CN103424192A - Method of temperature drift compensation for infrared thermometers - Google Patents
- ️Wed Dec 04 2013
CN103424192A - Method of temperature drift compensation for infrared thermometers - Google Patents
Method of temperature drift compensation for infrared thermometers Download PDFInfo
-
Publication number
- CN103424192A CN103424192A CN2013102964755A CN201310296475A CN103424192A CN 103424192 A CN103424192 A CN 103424192A CN 2013102964755 A CN2013102964755 A CN 2013102964755A CN 201310296475 A CN201310296475 A CN 201310296475A CN 103424192 A CN103424192 A CN 103424192A Authority
- CN
- China Prior art keywords
- temperature
- response output
- infrared
- infrared thermometer
- movement Prior art date
- 2013-07-16 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000004044 response Effects 0.000 claims abstract description 52
- 230000005457 Black-body radiation Effects 0.000 claims abstract description 6
- 239000011159 matrix material Substances 0.000 claims 4
- 230000007613 environmental effect Effects 0.000 claims 2
- 238000009529 body temperature measurement Methods 0.000 abstract description 14
- 230000008859 change Effects 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Landscapes
- Radiation Pyrometers (AREA)
Abstract
An embodiment of the invention discloses a method of temperature drift compensation for infrared thermometers. The method includes: setting temperature sensors on a core and a retainer plate respectively, responding to black-body radiation in a thermostat, and acquiring multiple response output groups by controlling the thermostat and the continuous change of black-body temperature; linearly fitting the response output of the infrared thermometer to black-body temperature, interior temperature of the thermostat and first temperature of the core by the obtained data groups; compensating temperature drift caused by the temperature of the core through fitting results, and acquiring a function of relation of the response output of the infrared thermometer to the black-body temperature, the interior temperature of the thermostat and the first temperature of the core; calibrating with the retainer plate, and acquiring current ambient temperature according to the fitted relation function; removing the retainer plate, measuring the temperature of a target object by the infrared thermometer, and calculating the temperature of the target object according to the current response output, the current ambient temperature and the fitted relation function. The method has the advantages that temperature change can be monitored in real time for the calibrating retainer plate and the core, the temperature drift caused by the change in the temperature of the core and the ambient temperature is compensated, nonuniformity of the infrared thermometer can be corrected effectively, and temperature measurement is more accurate.
Description
技术领域 technical field
本发明涉及红外成像领域，特别是涉及一种红外测温仪温度漂移补偿的方法。 The invention relates to the field of infrared imaging, in particular to a method for compensating the temperature drift of an infrared thermometer.
背景技术 Background technique
一切温度高于绝对零度的物体都在不停地向周围空间发射红外辐射能量，红外辐射能量的大小按波长的分布与它的表面温度有着十分密切的关系，通过对物体自身发出的红外能量的测量,能准确地测出它的表面温度。 All objects with a temperature higher than absolute zero are constantly emitting infrared radiation energy to the surrounding space. The distribution of infrared radiation energy according to the wavelength has a very close relationship with its surface temperature. Measurement can accurately measure its surface temperature.
红外测温技术随着现代技术的发展日趋完善, 并且逐渐渗透到各个领域。开发新型的红外测温技术，完善红外测温系统的性能是时代发展的要求。 With the development of modern technology, infrared temperature measurement technology is becoming more and more perfect, and gradually penetrates into various fields. The development of new infrared temperature measurement technology and the improvement of the performance of the infrared temperature measurement system are the requirements of the development of the times.
在众多红外测温技术中，最受关注的当属基于黑体辐射原理的红外测温技术，它的非接触测量，实现了遥测技术，同时极大的提高了仪器的使用寿命，降低了生产成本；光子作为信息载体，响应速度快；灵敏度高；频带宽，动态范围大；方便与计算机连接，容易实现数字化，智能化；体积小、重量轻、价格不断下降等优点使得它在其他的测温技术中占有越来越大的优势。 Among the many infrared temperature measurement technologies, the most concerned is the infrared temperature measurement technology based on the principle of black body radiation. Its non-contact measurement realizes the telemetry technology, greatly improves the service life of the instrument and reduces the production cost. ;Photon as an information carrier, fast response speed; high sensitivity; wide frequency band, large dynamic range; easy to connect with the computer, easy to realize digitization, intelligent; There is an increasing advantage in technology.
在红外测温过程中，红外焦平面阵列探测单元的响应特性会随着时间和环境的改变而发生缓慢变化，这种缓慢的变化，即漂移现象，这种漂移会使已生成的非均匀性校正系数在使用中产生较大的误差，如果不对漂移进行补偿，会严重影响红外系统的测温精度。因此对外界温度的监测和控制对提高红外探测器的测温精度显得尤为重要。 In the process of infrared temperature measurement, the response characteristics of the infrared focal plane array detection unit will slowly change with the change of time and environment. This slow change, that is, the drift phenomenon, will make the generated non-uniformity The correction coefficient produces a large error in use. If the drift is not compensated, it will seriously affect the temperature measurement accuracy of the infrared system. Therefore, the monitoring and control of the external temperature is particularly important to improve the temperature measurement accuracy of the infrared detector.
红外焦平面阵列温漂产生的原因有很多，其主要是由于外界环境和内部元器件温度变化对探测元的影响导致的。由于非致冷红外焦平面探测器系统无制冷装置，工作于环境温度时，探测单元的响应特性会随着环境温度、电源波动、吸收红外辐射以及挡板温度的变化而缓慢的漂移。 There are many reasons for the temperature drift of the infrared focal plane array, which is mainly caused by the influence of the temperature change of the external environment and internal components on the detection element. Since the uncooled infrared focal plane detector system has no refrigeration device, when working at ambient temperature, the response characteristics of the detection unit will slowly drift with the ambient temperature, power fluctuations, infrared radiation absorption and baffle temperature changes.
目前针对红外测温仪温度漂移的现象，通常采用的解决方法有两种：一是设计专门的补偿电路进行补偿，二是利用软件的方法进行补偿。 其中软件方法一般采用一点校正、两点校正、多点校正以及一点校正和两点校正同时并用的非均匀性校正算法，同时选择适当的定标物体以及控制环境温度的变化等。这些方法能够对温漂进行一定的补偿，但是在实际测温过程中，作为定标用的挡板本身温度也会发生变化，系统机芯以及环境温度的变化对红外探测器的影响也无法控制，因此这些方法都不能对红外测温的温度漂移进行彻底的补偿，红外测温仪的非均匀性校正得不到有效的提高，整个系统的测温精度也达不到理想的效果。 At present, there are usually two solutions to the temperature drift of infrared thermometers: one is to design a special compensation circuit for compensation, and the other is to use software to compensate. Among them, the software method generally adopts one-point correction, two-point correction, multi-point correction, and non-uniformity correction algorithms that use both one-point correction and two-point correction at the same time, while selecting appropriate calibration objects and controlling changes in ambient temperature. These methods can compensate the temperature drift to a certain extent, but in the actual temperature measurement process, the temperature of the baffle itself used for calibration will also change, and the influence of changes in the system core and ambient temperature on the infrared detector cannot be controlled , so these methods cannot completely compensate the temperature drift of infrared temperature measurement, the non-uniformity correction of infrared thermometer cannot be effectively improved, and the temperature measurement accuracy of the whole system cannot achieve the ideal effect.
发明内容 Contents of the invention
本发明的目的之一是提供一种能够实时监测挡板和机芯温度变化并对温度漂移进行补偿的红外测温仪温度漂移补偿的方法。 One of the objectives of the present invention is to provide a temperature drift compensation method for an infrared thermometer capable of monitoring the temperature changes of the baffle and the movement in real time and compensating for the temperature drift.
本发明实施例公开的技术方案包括： The technical solutions disclosed in the embodiments of the present invention include:
提供了一种红外测温仪温度漂移补偿的方法，其特征在于，包括： Provided is a method for temperature drift compensation of an infrared thermometer, characterized in that it includes:
在所述红外测温仪的机芯上设置第一温度传感器； A first temperature sensor is set on the core of the infrared thermometer;
将所述红外测温仪置于恒温箱中对黑体辐射进行响应，获得所述红外测温仪的红外焦平面阵列的第一响应输出，并获取与所述第一响应输出对应的所述黑体的温度、所述恒温箱内的温度，以及通过所述第一温度传感器获得与所述第一响应输出对应的所述机芯的第一温度； placing the infrared thermometer in an incubator to respond to blackbody radiation, obtaining the first response output of the infrared focal plane array of the infrared thermometer, and obtaining the blackbody corresponding to the first response output temperature, the temperature in the incubator, and the first temperature of the movement corresponding to the first response output obtained by the first temperature sensor;
对所述第一响应输出、所述黑体的温度、所述恒温箱内的温度和所述机芯的第一温度进行拟合，获得所述第一响应输出与所述黑体的温度、所述恒温箱内的温度和所述机芯的第一温度的第一关系函数； Fitting the first response output, the temperature of the blackbody, the temperature in the incubator, and the first temperature of the core to obtain the first response output and the temperature of the blackbody, the A first relationship function between the temperature in the thermostat and the first temperature of the movement;
将所述红外测温仪从所述恒温箱中取出； The infrared thermometer is taken out from the incubator;
将挡板放置在所述红外测温仪的红外镜头和所述红外焦平面阵列之间，并在所述挡板上设有第二温度传感器； The baffle is placed between the infrared lens of the infrared thermometer and the infrared focal plane array, and a second temperature sensor is arranged on the baffle;
通过所述第二温度传感器获得所述挡板的温度，通过所述第一温度传感器获得所述机芯的第二温度，并获得所述红外测温仪的所述红外焦平面阵列的第二响应输出； The temperature of the baffle is obtained by the second temperature sensor, the second temperature of the movement is obtained by the first temperature sensor, and the second temperature of the infrared focal plane array of the infrared thermometer is obtained. response output;
根据所述挡板的温度、所述机芯的第二温度、所述第二响应输出和所述第一关系函数计算当前环境温度； calculating the current ambient temperature according to the temperature of the baffle, the second temperature of the movement, the second response output and the first relational function;
对由所述机芯的温度引起的温度漂移进行补偿，获得所述红外测温仪的响应输出与环境温度和挡板温度之间的第二关系函数； Compensating the temperature drift caused by the temperature of the core, obtaining a second relational function between the response output of the infrared thermometer and the ambient temperature and the baffle temperature;
用所述红外测温仪对目标物体进行成像，获得所述红外测温仪的红外焦平面阵列的当前响应输出； Imaging the target object with the infrared thermometer to obtain the current response output of the infrared focal plane array of the infrared thermometer;
根据所述当前响应输出、所述当前环境温度和所述第二关系函数计算所述目标物体的温度。 calculating the temperature of the target object according to the current response output, the current ambient temperature and the second relational function.
进一步地，获得多个第一响应输出和与每个第一响应输出对应的黑体的温度、恒温箱内的温度和机芯的第一温度。 Further, a plurality of first response outputs and the temperature of the black body, the temperature in the thermostat box and the first temperature of the movement corresponding to each first response output are obtained.
本发明的实施例的方法中，可以实时监测定标挡板、机芯温度变化并对机芯、环境温度变化导致的温度漂移进行补偿，能够有效地校正红外测温仪的非均匀性，提高测温精度。 In the method of the embodiment of the present invention, the temperature change of the calibration baffle and the core can be monitored in real time and the temperature drift caused by the temperature change of the core and the environment can be compensated, which can effectively correct the non-uniformity of the infrared thermometer and improve Temperature measurement accuracy.
附图说明 Description of drawings
图1是本发明一个实施例的红外测温仪温度漂移补偿的方法的流程示意图。 FIG. 1 is a schematic flowchart of a method for compensating temperature drift of an infrared thermometer according to an embodiment of the present invention.
具体实施方式 Detailed ways
下面将参考附图详细说明本发明的实施例。 Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
图1为本发明一个实施例的一种红外测温仪温度漂移补偿的方法的流程示意图，下面对图1的实施例中各个步骤进行详细的说明。 FIG. 1 is a schematic flowchart of a method for temperature drift compensation of an infrared thermometer according to an embodiment of the present invention. The steps in the embodiment of FIG. 1 will be described in detail below.
如图1所示，本发明的实施例中，一种红外测温仪温度漂移补偿的方法包括步骤10、步骤12、步骤16和步骤18。 As shown in FIG. 1 , in an embodiment of the present invention, a method for temperature drift compensation of an infrared thermometer includes step 10 , step 12 , step 16 and step 18 .
步骤10：在红外测温仪的机芯上设置第一温度传感器。 Step 10: Set the first temperature sensor on the movement of the infrared thermometer.
在红外测温仪工作的过程中，由于例如红外测温仪器件工作中散发热量等因素，机芯温度会发生变化，从而影响红外测温仪的红外焦平面阵列的输出。本发明的实施例中，在红外测温仪的机芯上设置第一温度传感器，以实时监测机芯的温度。 During the working process of the infrared thermometer, due to factors such as heat emitted during the operation of the infrared thermometer device, the temperature of the core will change, thereby affecting the output of the infrared focal plane array of the infrared thermometer. In the embodiment of the present invention, a first temperature sensor is provided on the movement of the infrared thermometer to monitor the temperature of the movement in real time.
红外测温仪的机芯也即红外测温仪的控制器，其可以是任何类型的适合的电子器件，例如，可以通过单片机、微处理器、各种适合的专用集成电路、各种适合的逻辑器件（例如FPGA、CPLD等等）等等实现。本发明的实施例中的红外测温仪温度漂移补偿的方法的一些步骤可以在该机芯中实现或者执行，或者在该机芯的控制下实现。 The core of the infrared thermometer is also the controller of the infrared thermometer, which can be any type of suitable electronic device, for example, can be controlled by a single-chip microcomputer, a microprocessor, various suitable application-specific integrated circuits, various suitable Logic devices (such as FPGA, CPLD, etc.) and so on. Some steps of the method for compensating the temperature drift of the infrared thermometer in the embodiment of the present invention may be realized or executed in the core, or implemented under the control of the core.
红外测温仪的控制器还可以通过数据传输接口与上位机通信，从而在上位机的控制下工作。这里，上位机例如可以是其它的计算机或者其它控制装置。数据传输接口可以是任何适合不同电子设备之间进行数据传输的数据接口，例如，可以是RS232接口等等。 The controller of the infrared thermometer can also communicate with the host computer through the data transmission interface, so as to work under the control of the host computer. Here, the host computer can be, for example, other computers or other control devices. The data transmission interface may be any data interface suitable for data transmission between different electronic devices, for example, it may be an RS232 interface and the like.
本发明的实施例中，第一温度传感器可以是任何适合的温度传感器，只要能够实时测量获得机芯的温度即可。该第一温度传感器可以是集成在机芯上，也可以是通过适合的连接方式安装在机芯上。 In the embodiment of the present invention, the first temperature sensor may be any suitable temperature sensor, as long as it can measure and obtain the temperature of the movement in real time. The first temperature sensor may be integrated on the movement, or installed on the movement through a suitable connection method.
第一温度传感器电连接到红外测温仪的机芯，并且在机芯的控制下工作。在机芯的控制下，第一温度传感器采集机芯的温度，并将采集的温度数据发送给控制器。 The first temperature sensor is electrically connected to the movement of the infrared thermometer and works under the control of the movement. Under the control of the core, the first temperature sensor collects the temperature of the core, and sends the collected temperature data to the controller.
步骤12：在恒温箱中对黑体辐射进行响应并拟合获得第一关系函数。 Step 12: Responding to the black body radiation in the thermostat and fitting to obtain the first relational function.
红外测温仪中，红外焦平面阵列像元的响应输出与目标物体的辐射（用目标物体的温度T度量）、环境温度T环境、机芯温度T机芯有关，这种关系可以用一个模拟的函数表示为： In the infrared thermometer, the response output of the infrared focal plane array pixel is related to the radiation of the target object (measured by the temperature T of the target object), the ambient temperature T environment , and the core temperature T core . This relationship can be simulated by a The function of is expressed as:
这个函数关系代表了红外测温仪的红外焦平面阵列本身的响应特性。 This functional relationship represents the response characteristics of the infrared focal plane array itself of the infrared thermometer.
本发明的实施例中，可以通过在特定的环境温度、特定的机芯温度下红外测温仪的红外焦平面阵列下对特定温度的黑体的响应输出，获得红外测温仪的红外焦平面阵列的响应输出与黑体温度（相当于目标物体的温度）、该恒定的环境温度（相当于环境温度）和机芯温度之间的函数关系。 In the embodiment of the present invention, the infrared focal plane array of the infrared thermometer can be obtained through the response output of the infrared focal plane array of the infrared thermometer to a blackbody at a specific temperature at a specific ambient temperature and a specific core temperature. The response output of is a function of the blackbody temperature (equivalent to the temperature of the target object), the constant ambient temperature (equivalent to the ambient temperature), and the temperature of the core.
因此，步骤12中，可以将红外测温仪置于恒定的环境温度下，例如，置于恒温箱中，在恒温箱中对黑体辐射进行响应。 Therefore, in step 12, the infrared thermometer can be placed at a constant ambient temperature, for example, placed in a constant temperature box, and responds to black body radiation in the constant temperature box.
此时，控制黑体具有一定的温度，控制恒温箱内也具有一定的温度。红外测温仪中的红外焦平面阵列对于该具有一定的温度的黑体将具有一定的响应输出，本文中将在恒温箱内时红外测温仪中的红外焦平面阵列的响应输出称之为第一响应输出。 At this time, the control black body has a certain temperature, and the control thermostat also has a certain temperature. The infrared focal plane array in the infrared thermometer will have a certain response output to the black body with a certain temperature. In this paper, the response output of the infrared focal plane array in the infrared thermometer in the infrared thermometer is called the first A response output.
此时，测量红外测温仪的红外焦平面阵列的第一响应输出，并通过机芯上的第一温度传感器获得此时的机芯的温度（本文中，将在恒温箱内时测量获得的机芯温度称之为机芯的第一温度），这样，即可获得一组数据：黑体的温度、恒温箱的温度、机芯的第一温度、第一响应输出。 At this time, measure the first response output of the infrared focal plane array of the infrared thermometer, and obtain the temperature of the movement at this time through the first temperature sensor on the movement (herein, the temperature obtained by measuring in the incubator The temperature of the core is called the first temperature of the core), so that a set of data can be obtained: the temperature of the black body, the temperature of the thermostat, the first temperature of the core, and the first response output.
控制黑体的温度和恒温箱内的温度变化，对于每组黑体温度和恒温箱内的温度，均测量获得对应的机芯的第一温度和红外测温仪的红外焦平面阵列的第一响应输出，这样，即可获得一系列的数据组。 Control the temperature of the blackbody and the temperature change in the incubator. For each set of blackbody temperature and temperature in the incubator, measure the first temperature of the corresponding movement and the first response output of the infrared focal plane array of the infrared thermometer. , so that a series of data groups can be obtained.
然后，对获得的第一响应输出、黑体的温度、恒温箱内的温度和机芯的第一温度的该一系列数据组进行拟合，并用拟合的结果对机芯温度温度引起的漂移进行补偿，获得第一响应输出与黑体的温度、恒温箱内的温度和机芯的第一温度之间的关系函数： Then, the series of data sets of the obtained first response output, the temperature of the black body, the temperature in the thermostat box and the first temperature of the movement are fitted, and the drift caused by the temperature of the movement is carried out with the fitting result. Compensate to obtain the relationship function between the first response output and the temperature of the black body, the temperature in the thermostat and the first temperature of the movement:
（2） (2)
其中Tb是黑体的温度。 where Tb is the temperature of the black body.
本文中称之为第一关系函数。 This is referred to herein as the first relational function.
对这些数据组进行拟合的方法可以使用数学领域中任何适合的拟合方法，在此不再赘述。对数据组的拟合过程可以由机芯执行适合的程序实现。 The method for fitting these data sets can use any suitable fitting method in the field of mathematics, which will not be repeated here. The fitting process to the data set can be realized by executing a suitable program on the core.
步骤16：从恒温箱中取出红外测温仪并用挡板定标，获得当前环境温度。 Step 16: Take out the infrared thermometer from the incubator and calibrate with the baffle to obtain the current ambient temperature.
获得第一关系函数之后，即可用该第一关系函数标定当前的环境温度。 After the first relational function is obtained, the current ambient temperature can be calibrated by using the first relational function.
步骤16中，首先将红外测温仪从恒温箱中取出，然后在红外测温仪的红外镜头和红外焦平面阵列之间。该挡板可以用任何适合的方式驱动，例如，红外测温仪中可以设置电机，电机的输出轴通过传动转置与挡板连接，从而驱动挡板运动到红外镜头和红外焦平面阵列之间，或者从红外镜头和红外焦平面阵列之间移开。 In step 16, the infrared thermometer is first taken out of the incubator, and then placed between the infrared lens of the infrared thermometer and the infrared focal plane array. The baffle can be driven in any suitable way, for example, a motor can be set in the infrared thermometer, and the output shaft of the motor is connected to the baffle through transmission transposition, so as to drive the baffle to move between the infrared lens and the infrared focal plane array , or move away from between the infrared lens and the infrared focal plane array.
本发明的实施例中，挡板上可以设置第二温度传感器。第二温度传感器可以是任何适合的温度传感器，只要能够实时测量获得挡板的温度即可。该第二温度传感器可以是集成在挡板上，也可以是通过适合的连接方式安装在挡板上。 In an embodiment of the present invention, a second temperature sensor may be arranged on the baffle. The second temperature sensor can be any suitable temperature sensor, as long as it can measure and obtain the temperature of the baffle in real time. The second temperature sensor may be integrated on the baffle, or installed on the baffle through a suitable connection method.
第二温度传感器电连接到红外测温仪的机芯，并且在机芯的控制下工作。在机芯的控制下，第二温度传感器采集挡板的温度，并将采集的温度数据发送给机芯。 The second temperature sensor is electrically connected to the movement of the infrared thermometer and works under the control of the movement. Under the control of the movement, the second temperature sensor collects the temperature of the baffle, and sends the collected temperature data to the movement.
挡板设置在红外镜头和红外焦平面阵列之间之后，红外焦平面阵列会响应挡板的辐射而产生响应输出（本文中，将在用挡板定标时红外焦平面阵列的响应输出称之为第二响应输出）。 After the baffle is set between the infrared lens and the infrared focal plane array, the infrared focal plane array will respond to the radiation of the baffle to generate a response output (in this paper, the response output of the infrared focal plane array when the baffle is used for calibration is called output for the second response).
测量获得红外焦平面阵列的第二响应输出，并通过第二温度传感器获得挡板的温度，以及通过第一温度传感器获得机芯的温度（本文中，将在用挡板定标时机芯的温度称之为机芯的第二温度）。 The measurement obtains the second response output of the infrared focal plane array, and obtains the temperature of the baffle through the second temperature sensor, and obtains the temperature of the movement through the first temperature sensor (in this paper, the temperature of the movement when using the baffle to calibrate The temperature is called the second temperature of the movement).
然后，即可根据获得的挡板的温度、机芯的第二温度、红外焦平面阵列的第二响应输出和前述的第一函数关系，即可计算出当前环境温度。 Then, the current ambient temperature can be calculated according to the obtained temperature of the baffle, the second temperature of the core, the second response output of the infrared focal plane array and the aforementioned first functional relationship.
在用挡板进行定标时，设黑体的辐出度为Pb，挡板的辐射能为P挡，当红外焦平面阵列接收到相同辐出度的情况下，挡板温度与黑体温度的关系为： When using the baffle for calibration, set the radiance of the black body as P b , and the radiant energy of the baffle as P block . When the infrared focal plane array receives the same radiance, the temperature of the baffle is equal to the temperature of the black body The relationship is:
可推出： Can launch:
或者 or
其中ε为挡板的发射率，为光学系统透过率，Tb是黑体的温度，T挡是挡板的温度。 Where ε is the emissivity of the baffle, the transmittance of the optical system, T b is the temperature of the blackbody, and T is the temperature of the baffle.
将式（3）代入式（2）中，可以获得此时第二响应输出与挡板温度、环境温度和机芯温度之间的函数关系： Substituting formula (3) into formula (2), the functional relationship between the second response output and the baffle temperature, ambient temperature and core temperature can be obtained at this time:
本文中称之为第二关系函数。 This is referred to herein as the second relational function.
由前文所述，步骤16中已经获得了挡板的温度（即式（5）中的T挡）、机芯的第二温度（即式（5）中的T机芯）和红外焦平面阵列的第二响应输出（即式（5）中的V）。因此，根据式（5），即可计算出当前环境温度（即式（5）中的T环境）。 As mentioned above, the temperature of the baffle (that is, the T block in formula (5)), the second temperature of the movement (that is, the T movement in formula (5)) and the infrared focal plane array have been obtained in step 16. The second response output (that is, V in formula (5)). Therefore, according to formula (5), the current ambient temperature (that is, T environment in formula (5)) can be calculated.
步骤18：用红外测温仪对目标物体测温，获得目标物体温度。 Step 18: Use an infrared thermometer to measure the temperature of the target object to obtain the temperature of the target object.
在前述步骤中获得了当前环境温度和第二关系函数之后，即可将挡板从红外镜头和红外焦平面阵列之间移开，然后用该红外测温仪对目标物体测温，获得此时红外焦平面阵列的当前响应输出。 After obtaining the current ambient temperature and the second relational function in the preceding steps, the baffle can be removed from between the infrared lens and the infrared focal plane array, and then the infrared thermometer is used to measure the temperature of the target object to obtain The current response output of the infrared focal plane array.
然后，根据前述获得的第二关系函数（式（5）），以及当前响应输出（相当于式（5）中的V2）和步骤16中机芯的第二温度（相当于式（5）中的T机芯）以及步骤16中获得当前环境温度（相当于式（5）中的T环境）即可计算出目标物体的表面温度（此时，式（5）中的T挡即为目标物体表面温度）。 Then, according to the second relational function (equation (5)) obtained above, and the current response output (equivalent to V 2 in the expression (5)) and the second temperature of the core in step 16 (equivalent to the expression (5) The T core in the formula) and the current ambient temperature obtained in step 16 (equivalent to the T environment in the formula (5)) can calculate the surface temperature of the target object (at this time, the T gear in the formula (5) is the target object surface temperature).
本发明的实施例的方法中，可以实时监测定标挡板、机芯温度变化并对机芯、环境温度变化导致的温度漂移进行补偿，能够有效地校正红外测温仪的非均匀性，提高测温精度。 In the method of the embodiment of the present invention, the temperature change of the calibration baffle and the core can be monitored in real time and the temperature drift caused by the temperature change of the core and the environment can be compensated, which can effectively correct the non-uniformity of the infrared thermometer and improve Temperature measurement accuracy.
以上通过具体的实施例对本发明进行了说明，但本发明并不限于这些具体的实施例。本领域技术人员应该明白，还可以对本发明做各种修改、等同替换、变化等等，这些变换只要未背离本发明的精神，都应在本发明的保护范围之内。此外，以上多处所述的“一个实施例”表示不同的实施例，当然也可以将其全部或部分结合在一个实施例中。 The present invention has been described above through specific examples, but the present invention is not limited to these specific examples. Those skilled in the art should understand that various modifications, equivalent replacements, changes, etc. can also be made to the present invention. As long as these changes do not deviate from the spirit of the present invention, they should all be within the protection scope of the present invention. In addition, "one embodiment" described in many places above represents different embodiments, and of course all or part of them may be combined in one embodiment.
Claims (2)
1. the method for an infrared thermometer temperature drift compensation, is characterized in that, comprising:
The first temperature sensor is set on the movement of described infrared thermometer;
Described infrared thermometer is placed in to constant temperature oven to be responded blackbody radiation, obtain the first response output of the infrared focal plane array of described infrared thermometer, and obtain the temperature of the described black matrix corresponding with described the first response output, the temperature in described constant temperature oven, and obtain the first temperature of exporting corresponding described movement with described the first response by described the first temperature sensor;
The temperature of described the first response output, described black matrix, temperature in described constant temperature oven and the first temperature of described movement are carried out to matching, and compensate with the temperature drift that the result of matching causes the movement temperature, obtain the first relation function of the first temperature of described the first response output and the temperature of described black matrix, the temperature in described constant temperature oven and described movement;
Described infrared thermometer is taken out from described constant temperature oven;
Baffle plate is placed between the infrared lens and described infrared focal plane array of described infrared thermometer, and is provided with the second temperature sensor on described baffle plate;
By measuring infrared focal plane array, receive in the situation of identical spoke out-degree, the relation of baffle plate temperature and blackbody temperature and the first funtcional relationship, calculate the second relation function of temperature, environment temperature and the described movement temperature of response output and described baffle plate;
Obtain the temperature of described baffle plate by described the second temperature sensor, obtain the second temperature of described movement by described the first temperature sensor, and obtain the second response output of the described infrared focal plane array of described infrared thermometer;
Calculate current environmental temperature according to the second temperature of the temperature of described baffle plate, described movement, described the second response output and described the second relation function;
With described infrared thermometer, target object is carried out to thermometric, obtain the current response output of the infrared focal plane array of described infrared thermometer;
Calculate the temperature of described target object according to described current response output, described current environmental temperature and described the first relation function.
2. the method for claim 1 is characterized in that: the temperature, the temperature in constant temperature oven and the first temperature of movement that obtain a plurality of the first response output and the black matrix corresponding with each the first response output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310296475.5A CN103424192B (en) | 2013-07-16 | 2013-07-16 | A kind of method of infrared thermometer temperature drift compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310296475.5A CN103424192B (en) | 2013-07-16 | 2013-07-16 | A kind of method of infrared thermometer temperature drift compensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103424192A true CN103424192A (en) | 2013-12-04 |
| CN103424192B CN103424192B (en) | 2015-10-28 |
Family
ID=49649280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310296475.5A Expired - Fee Related CN103424192B (en) | 2013-07-16 | 2013-07-16 | A kind of method of infrared thermometer temperature drift compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103424192B (en) |
Cited By (23)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792011A (en) * | 2014-01-27 | 2014-05-14 | 无锡艾立德智能科技有限公司 | Method and device for compensating for temperature drift through thermal infrared imager in a self-adaptation mode |
| CN103869151A (en) * | 2014-03-24 | 2014-06-18 | 国网河南省电力公司漯河供电公司 | Sampling resistor real-time deviation-correcting and compensating method based on infrared principle |
| CN104181613A (en) * | 2014-08-13 | 2014-12-03 | 中国人民解放军理工大学 | Foundation infrared ceilometer on-site calibration method and device |
| CN104280136A (en) * | 2014-09-30 | 2015-01-14 | 中国电子科技集团公司第四十一研究所 | Temperature drift and spectral response compensation method for pyroelectric detector |
| CN104634458A (en) * | 2014-11-04 | 2015-05-20 | 北京富吉瑞光电科技有限公司 | Temperature measurement calibration system and temperature measurement method |
| CN105864956A (en) * | 2016-03-28 | 2016-08-17 | 广东美的暖通设备有限公司 | Drifting detection method for temperature sensor in air side heat exchanger, processor and air conditioner |
| CN106662559A (en) * | 2014-02-19 | 2017-05-10 | 马林克罗特医疗产品知识产权公司 | Method for compensating for long term sensitivity drift of an electrochemical gas sensor exposed to nitric oxide |
| CN106768347A (en) * | 2016-11-17 | 2017-05-31 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of temp measuring method of the uncooled ir temperature measurer of uncompensated device |
| CN107885078A (en) * | 2017-10-24 | 2018-04-06 | 西安惠迪诺华电子科技股份有限公司 | The adaptive temperature-compensation circuit and method of a kind of ultraviolet infrared detector |
| CN108322732A (en) * | 2017-12-01 | 2018-07-24 | 中国航空工业集团公司洛阳电光设备研究所 | The thermal infrared imager nonuniformity correction baffle test method of variable temperatures radiative material |
| TWI651519B (en) * | 2017-12-26 | 2019-02-21 | 國家中山科學研究院 | Temperature measurement correction method, electronic system and method for generating corrected regression coefficient table |
| CN109549635A (en) * | 2018-11-08 | 2019-04-02 | 湖南仪峰安安网络科技股份有限公司 | Body temperature on-line dynamic measurement method and wearable device |
| CN110230868A (en) * | 2019-05-17 | 2019-09-13 | 青岛海尔空调器有限总公司 | The control method of human body temperature detection method and air-conditioning system |
| CN110672214A (en) * | 2019-10-28 | 2020-01-10 | 中科和光（天津）应用激光技术研究所有限公司 | Method for acquiring temperature drift compensation parameter of uncooled infrared thermal imaging |
| CN110793635A (en) * | 2019-10-10 | 2020-02-14 | 深圳市景阳信息技术有限公司 | Thermal imaging temperature measurement method and device and terminal equipment |
| CN111595462A (en) * | 2020-07-23 | 2020-08-28 | 南京智谱科技有限公司 | Infrared imaging temperature measurement system calibration method and device, computing equipment and storage medium |
| CN111879411A (en) * | 2020-07-30 | 2020-11-03 | 河南中原申威信息科技有限公司 | an infrared thermometer |
| CN111964789A (en) * | 2020-08-14 | 2020-11-20 | 深圳市视美泰技术股份有限公司 | Temperature measuring method, temperature measuring device, computer equipment and storage medium |
| CN113252189A (en) * | 2021-04-20 | 2021-08-13 | 北京空间机电研究所 | Temperature drift calibration method of high-precision low-temperature drift temperature measurement circuit of infrared detector |
| CN113375816A (en) * | 2021-04-30 | 2021-09-10 | 武汉华中数控股份有限公司 | Infrared temperature measurement method based on detector temperature |
| CN113542732A (en) * | 2021-07-19 | 2021-10-22 | 中国大恒(集团)有限公司北京图像视觉技术分公司 | High-precision measuring system |
| CN113749623A (en) * | 2020-11-23 | 2021-12-07 | 田海中 | Method, system and device for non-contact, namely rapid and accurate measurement of oral cavity body temperature |
| WO2022087783A1 (en) * | 2020-10-26 | 2022-05-05 | 深圳市大疆创新科技有限公司 | Temperature drift correction method and apparatus for infrared thermal imager, infrared thermal imager, movable platform and computer-readable storage medium |
Citations (2)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042878A (en) * | 2010-10-21 | 2011-05-04 | 电子科技大学 | Infared nonuniformity correction method for removing temperature shift |
| US20130147966A1 (en) * | 2009-02-23 | 2013-06-13 | Flir System, Inc. | Flat field correction for infrared cameras |
-
2013
- 2013-07-16 CN CN201310296475.5A patent/CN103424192B/en not_active Expired - Fee Related
Patent Citations (2)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130147966A1 (en) * | 2009-02-23 | 2013-06-13 | Flir System, Inc. | Flat field correction for infrared cameras |
| CN102042878A (en) * | 2010-10-21 | 2011-05-04 | 电子科技大学 | Infared nonuniformity correction method for removing temperature shift |
Cited By (37)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792011A (en) * | 2014-01-27 | 2014-05-14 | 无锡艾立德智能科技有限公司 | Method and device for compensating for temperature drift through thermal infrared imager in a self-adaptation mode |
| CN103792011B (en) * | 2014-01-27 | 2016-05-25 | 无锡艾立德智能科技有限公司 | A kind of self adaptation thermal infrared imager temperature drift compensation method and device |
| US11141549B2 (en) | 2014-02-19 | 2021-10-12 | Mallinckrodt Pharmaceuticals Ireland Limited | Systems and methods for compensating long term sensitivity drift of electrochemical gas sensors exposed to nitric oxide |
| CN106662559B (en) * | 2014-02-19 | 2019-09-27 | 马林克罗特医疗产品知识产权公司 | Method for compensating for long term sensitivity drift of an electrochemical gas sensor exposed to nitric oxide |
| CN106662559A (en) * | 2014-02-19 | 2017-05-10 | 马林克罗特医疗产品知识产权公司 | Method for compensating for long term sensitivity drift of an electrochemical gas sensor exposed to nitric oxide |
| CN103869151A (en) * | 2014-03-24 | 2014-06-18 | 国网河南省电力公司漯河供电公司 | Sampling resistor real-time deviation-correcting and compensating method based on infrared principle |
| CN103869151B (en) * | 2014-03-24 | 2017-06-13 | 国家电网公司 | A kind of sampling resistor real-time deviation correcting compensation method based on infrared principles |
| CN104181613A (en) * | 2014-08-13 | 2014-12-03 | 中国人民解放军理工大学 | Foundation infrared ceilometer on-site calibration method and device |
| CN104181613B (en) * | 2014-08-13 | 2017-02-15 | 中国人民解放军理工大学 | Foundation infrared ceilometer on-site calibration method |
| CN104280136B (en) * | 2014-09-30 | 2017-05-17 | 中国电子科技集团公司第四十一研究所 | Temperature drift and spectral response compensation method for pyroelectric detector |
| CN104280136A (en) * | 2014-09-30 | 2015-01-14 | 中国电子科技集团公司第四十一研究所 | Temperature drift and spectral response compensation method for pyroelectric detector |
| CN104634458A (en) * | 2014-11-04 | 2015-05-20 | 北京富吉瑞光电科技有限公司 | Temperature measurement calibration system and temperature measurement method |
| CN105864956A (en) * | 2016-03-28 | 2016-08-17 | 广东美的暖通设备有限公司 | Drifting detection method for temperature sensor in air side heat exchanger, processor and air conditioner |
| CN106768347B (en) * | 2016-11-17 | 2019-03-05 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of temp measuring method of the uncooled ir temperature measurer of uncompensated device |
| CN106768347A (en) * | 2016-11-17 | 2017-05-31 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of temp measuring method of the uncooled ir temperature measurer of uncompensated device |
| CN107885078A (en) * | 2017-10-24 | 2018-04-06 | 西安惠迪诺华电子科技股份有限公司 | The adaptive temperature-compensation circuit and method of a kind of ultraviolet infrared detector |
| CN108322732B (en) * | 2017-12-01 | 2020-02-14 | 中国航空工业集团公司洛阳电光设备研究所 | Thermal infrared imager non-uniform correction baffle testing method for temperature-variable radiation material |
| CN108322732A (en) * | 2017-12-01 | 2018-07-24 | 中国航空工业集团公司洛阳电光设备研究所 | The thermal infrared imager nonuniformity correction baffle test method of variable temperatures radiative material |
| TWI651519B (en) * | 2017-12-26 | 2019-02-21 | 國家中山科學研究院 | Temperature measurement correction method, electronic system and method for generating corrected regression coefficient table |
| CN109549635A (en) * | 2018-11-08 | 2019-04-02 | 湖南仪峰安安网络科技股份有限公司 | Body temperature on-line dynamic measurement method and wearable device |
| CN109549635B (en) * | 2018-11-08 | 2022-04-19 | 湖南仪峰安安网络科技股份有限公司 | Dynamic online measuring method for human body temperature and wearable equipment |
| CN110230868A (en) * | 2019-05-17 | 2019-09-13 | 青岛海尔空调器有限总公司 | The control method of human body temperature detection method and air-conditioning system |
| CN110793635A (en) * | 2019-10-10 | 2020-02-14 | 深圳市景阳信息技术有限公司 | Thermal imaging temperature measurement method and device and terminal equipment |
| CN110793635B (en) * | 2019-10-10 | 2020-10-23 | 深圳市景阳信息技术有限公司 | Thermal imaging temperature measurement method and device and terminal equipment |
| CN110672214A (en) * | 2019-10-28 | 2020-01-10 | 中科和光（天津）应用激光技术研究所有限公司 | Method for acquiring temperature drift compensation parameter of uncooled infrared thermal imaging |
| CN111595462A (en) * | 2020-07-23 | 2020-08-28 | 南京智谱科技有限公司 | Infrared imaging temperature measurement system calibration method and device, computing equipment and storage medium |
| CN111595462B (en) * | 2020-07-23 | 2020-11-13 | 南京智谱科技有限公司 | Infrared imaging temperature measurement system calibration method and device, computing equipment and storage medium |
| CN111879411A (en) * | 2020-07-30 | 2020-11-03 | 河南中原申威信息科技有限公司 | an infrared thermometer |
| CN111964789A (en) * | 2020-08-14 | 2020-11-20 | 深圳市视美泰技术股份有限公司 | Temperature measuring method, temperature measuring device, computer equipment and storage medium |
| WO2022087783A1 (en) * | 2020-10-26 | 2022-05-05 | 深圳市大疆创新科技有限公司 | Temperature drift correction method and apparatus for infrared thermal imager, infrared thermal imager, movable platform and computer-readable storage medium |
| CN113749623A (en) * | 2020-11-23 | 2021-12-07 | 田海中 | Method, system and device for non-contact, namely rapid and accurate measurement of oral cavity body temperature |
| CN113749623B (en) * | 2020-11-23 | 2023-11-03 | 田海中 | Method, system and device for precisely measuring oral cavity body temperature in non-contact type instant speed |
| CN113252189A (en) * | 2021-04-20 | 2021-08-13 | 北京空间机电研究所 | Temperature drift calibration method of high-precision low-temperature drift temperature measurement circuit of infrared detector |
| CN113375816A (en) * | 2021-04-30 | 2021-09-10 | 武汉华中数控股份有限公司 | Infrared temperature measurement method based on detector temperature |
| CN113375816B (en) * | 2021-04-30 | 2023-03-14 | 武汉华中数控股份有限公司 | Infrared temperature measurement method based on detector temperature |
| CN113542732A (en) * | 2021-07-19 | 2021-10-22 | 中国大恒(集团)有限公司北京图像视觉技术分公司 | High-precision measuring system |
| CN113542732B (en) * | 2021-07-19 | 2024-04-16 | 中国大恒(集团)有限公司北京图像视觉技术分公司 | High-precision measurement system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103424192B (en) | 2015-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103424192B (en) | 2015-10-28 | A kind of method of infrared thermometer temperature drift compensation |
| CN111351583A (en) | 2020-06-30 | Temperature correction method for infrared temperature measurement and infrared thermal imager |
| Zhang et al. | 2016 | A method for reducing the influence of measuring distance on infrared thermal imager temperature measurement accuracy |
| CN101435721B (en) | 2011-02-23 | Infrared target temperature correction system and method |
| CN102564598B (en) | 2013-09-25 | Method for calibrating and correcting temperature measurement of infrared probe as well as corresponding temperature measuring method |
| RU2523775C2 (en) | 2014-07-20 | Method and system for correction on basis of quantum theory to increase accuracy of radiation thermometer |
| CN104634458A (en) | 2015-05-20 | Temperature measurement calibration system and temperature measurement method |
| CN103983361A (en) | 2014-08-13 | Online network temperature-measuring thermal imager calibration method |
| CN101183026A (en) | 2008-05-21 | Infrared temperature measurement online self-calibration device and method thereof |
| CN111272290B (en) | 2022-07-19 | Temperature measurement thermal infrared imager calibration method and device based on deep neural network |
| CN107677375A (en) | 2018-02-09 | Calibration device and calibration method for infrared radiation measurement system |
| CN111024238A (en) | 2020-04-17 | Radiation calibration and temperature measurement method for uncooled temperature measurement thermal imager |
| CN202631114U (en) | 2012-12-26 | Infrared image processing apparatus and system |
| CN106124062A (en) | 2016-11-16 | A kind of infrared measurement of temperature automatic compensating method based on historical data |
| CN106679817A (en) | 2017-05-17 | Method for calibrating thermal infrared imager |
| EP3926311A1 (en) | 2021-12-22 | Temperature measuring device and method using thermal imaging camera, and computer-readable recording medium |
| CN106768347A (en) | 2017-05-31 | A kind of temp measuring method of the uncooled ir temperature measurer of uncompensated device |
| CN111272289A (en) | 2020-06-12 | Real-time calibration device for thermal infrared imager |
| CN105628208A (en) | 2016-06-01 | Temperature measurement method based on infrared imaging system |
| CN101915618A (en) | 2010-12-15 | A calibration device and method for high-temperature gas emissivity |
| CN104316194A (en) | 2015-01-28 | Light adjusting-type infrared radiation calibration method |
| CN111024237A (en) | 2020-04-17 | Non-contact wide-temperature-difference infrared temperature measuring method |
| CN111198041A (en) | 2020-05-26 | Device and method for multi-dimensional non-contact high-precision detection of target temperature |
| CN103256999B (en) | 2015-05-20 | Distributed type optical fiber temperature measuring method |
| CN114018416A (en) | 2022-02-08 | Thermal infrared camera radiation calibration method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 2013-12-04 | C06 | Publication | |
| 2013-12-04 | PB01 | Publication | |
| 2013-12-25 | C10 | Entry into substantive examination | |
| 2013-12-25 | SE01 | Entry into force of request for substantive examination | |
| 2015-10-28 | C14 | Grant of patent or utility model | |
| 2015-10-28 | GR01 | Patent grant | |
| 2024-06-28 | CF01 | Termination of patent right due to non-payment of annual fee | |
| 2024-06-28 | CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 |