CN207528356U - A kind of multichannel temperature monitoring device for underground heat shallow well - Google Patents

本实用新型涉及温度实时监测领域，尤其涉及一种用于地热浅井的多通道温度监测装置。用于地热浅井的多通道温度监测装置包括监测箱、温度传感网络和安装组件。本实用新型利用光纤布拉格光栅温度传感器采集到温度的光信号，通过监测箱转化为相应的温度数据发送到数据监控中心，解决了现有监测设备抗腐蚀能力差且容易受到电磁干扰，不能保证在恶劣环境下的长期稳定运行，受到复杂几何空间限制，且只能实现点式测量等的缺陷。

The utility model relates to the field of real-time temperature monitoring, in particular to a multi-channel temperature monitoring device for geothermal shallow wells. A multi-channel temperature monitoring device for shallow geothermal wells includes a monitoring box, a temperature sensing network and installation components. The utility model uses the optical fiber Bragg grating temperature sensor to collect the optical signal of the temperature, converts it into corresponding temperature data and sends it to the data monitoring center through the monitoring box, and solves the problem that the existing monitoring equipment has poor corrosion resistance and is prone to electromagnetic interference, which cannot be guaranteed Long-term stable operation in harsh environments is limited by complex geometric space and can only achieve point-based measurement.

一种用于地热浅井的多通道温度监测装置A multi-channel temperature monitoring device for geothermal shallow wells

技术领域technical field

本实用新型涉及地热浅井温度实时监测领域，尤其涉及一种用于地热浅井的多通道温度监测装置。The utility model relates to the field of real-time temperature monitoring of geothermal shallow wells, in particular to a multi-channel temperature monitoring device for geothermal shallow wells.

背景技术Background technique

浅层地温能是指蕴藏在地表以下一定深度(一般小于200米)范围内岩土体、地下水和地表水中具有开发利用价值的一般低于25℃的热能。Shallow geothermal energy refers to the heat energy that is generally lower than 25°C and has development and utilization value in rock and soil, groundwater, and surface water within a certain depth (generally less than 200 meters) below the surface.

目前，我国浅层地温能研究程度较低，特别是换热效率、节能等方面都存在着瓶颈，究其根源则为无法确定性的捕获小井眼换热通道内温度的空间分布情况。At present, the research level of shallow geothermal energy in my country is relatively low, especially in terms of heat transfer efficiency and energy saving.

现有技术利用铂电阻或DS18B20温度传感器进行数据采集，具有监测设备抗腐蚀能力差且容易受到电磁干扰，不能保证在恶劣环境下的长期稳定运行，受到复杂几何空间限制，且只能实现点式测量等的缺陷。The existing technology uses platinum resistance thermometers or DS18B20 temperature sensors for data collection. The monitoring equipment has poor corrosion resistance and is susceptible to electromagnetic interference. It cannot guarantee long-term stable operation in harsh environments. It is limited by complex geometric spaces and can only realize point-type Defects in measurement etc.

实用新型内容Utility model content

鉴于上述的分析，本实用新型旨在提供一种用于地热浅井的多通道温度监测装置，用以解决现有装置通道不可扩展且传感器数量单一的问题。In view of the above analysis, the utility model aims to provide a multi-channel temperature monitoring device for geothermal shallow wells to solve the problems of the existing device that the channels are not expandable and the number of sensors is single.

本实用新型的目的主要是通过以下技术方案实现的：The purpose of this utility model is mainly achieved by the following technical solutions:

一种用于地热浅井的多通道准分布式温度监测装置，其特征在于，包括监测箱、温度传感网络和安装组件；A multi-channel quasi-distributed temperature monitoring device for geothermal shallow wells, characterized in that it includes a monitoring box, a temperature sensing network and an installation assembly;

所述温度传感网络与监测箱的连接孔通过通讯光缆相连；The temperature sensing network is connected to the connection hole of the monitoring box through a communication optical cable;

所述温度传感网络由多通道的温度传感器串组成，每个温度传感器串包括至少一个光纤布拉格光栅温度传感器；The temperature sensing network is composed of multi-channel temperature sensor strings, and each temperature sensor string includes at least one fiber Bragg grating temperature sensor;

每个温度传感器串通过安装组件固定安装在地热浅井监测孔中。Each temperature sensor string is fixedly installed in the geothermal shallow well monitoring hole through the installation component.

本实用新型有益效果如下：选用光纤布拉格光栅温度传感器测量温度代替传统的铂电阻或DS18B20温度传感器，因为光纤传输的是光波信号，避免了原传感器容易受电磁干扰的缺陷，且光纤不易腐蚀，可有效地保证在恶劣环境下长期稳定的运行。并且其温度传感网络由多通道温度传感串组成，解决了现有设备只能实现点式监测的问题。The beneficial effects of the utility model are as follows: the optical fiber Bragg grating temperature sensor is used to measure the temperature instead of the traditional platinum resistance or DS18B20 temperature sensor, because the optical fiber transmits the light wave signal, which avoids the defect that the original sensor is easily subjected to electromagnetic interference, and the optical fiber is not easy to corrode, and can Effectively ensure long-term stable operation in harsh environments. And its temperature sensing network is composed of multi-channel temperature sensing strings, which solves the problem that the existing equipment can only realize point monitoring.

在上述方案的基础上，本发明还做了如下改进：On the basis of the foregoing scheme, the present invention has also made the following improvements:

进一步，所述安装组件包括套管、钢丝绳和卡具；每个温度传感器串安置在一个套管中，套管垂向设置在地热浅井监测孔中；Further, the installation assembly includes a casing, a steel wire rope and a clamp; each temperature sensor string is arranged in a casing, and the casing is vertically arranged in a geothermal shallow well monitoring hole;

所述温度传感器串与钢丝绳捆绑安置在套管中，钢丝绳的首段固定在地面之上，尾端设有重锤，传感器串上的每个温度传感器通过卡具固定在钢丝绳上，沿钢丝绳垂向设置于监测孔的不同高度位置处。The temperature sensor string is bundled with the steel wire rope and placed in the casing. The first section of the steel wire rope is fixed on the ground, and the tail end is provided with a weight. It is arranged at different height positions of the monitoring hole.

采用上述进一步方案的有益效果是：将传感器固定在带重锤的钢丝绳上使得钢丝绳承重主要垂向拉力，以避免温度传感器因自身重力造成测量误差和损坏。并将温度传感器和钢丝绳设置在套管中，既可以保护温度传感器，又可以快速将温度传导到传感器中。The beneficial effect of adopting the above further solution is: the sensor is fixed on the steel wire rope with a weight so that the steel wire rope bears the main vertical tension, so as to avoid measurement error and damage of the temperature sensor due to its own gravity. And the temperature sensor and the steel wire rope are arranged in the casing, which can not only protect the temperature sensor, but also quickly conduct the temperature into the sensor.

进一步，所述地热浅井监测孔与套管之间设置有填充物，确保套管与井壁完整耦合无间隙。Further, a filler is provided between the monitoring hole of the geothermal shallow well and the casing to ensure that the casing is fully coupled with the well wall without gaps.

采用上述进一步方案的有益效果是：用回填的方法将套管与监测孔之间无间隙，使得热量能更好的传导到温度传感器，从而减小误差。The beneficial effect of adopting the above further scheme is: there is no gap between the bushing and the monitoring hole by backfilling, so that the heat can be better conducted to the temperature sensor, thereby reducing the error.

进一步，所述填充物为上返岩屑、原浆灌浆浇筑物；或者，为包括膨润土、水泥、砂和水的混合料；或者，为原位土。Further, the filler is upturned rock cuttings, grouted grouting material; or, a mixture including bentonite, cement, sand and water; or, in-situ soil.

采用上述进一步方案的有益效果是：将填充物选择为上述材料，可以有效的模拟原本的土壤状态，最大程度的减小误差。The beneficial effect of adopting the above further solution is: the filling material is selected as the above material, which can effectively simulate the original soil state and minimize errors.

进一步，所述监测箱，包括光电信号发射与传输组件，光电信号转化与处理组件和微控制器；Further, the monitoring box includes a photoelectric signal emission and transmission component, a photoelectric signal conversion and processing component and a microcontroller;

所述微控制器分别与光电信号发射与传输组件、光电信号转化与处理组件相连；光电信号发射与传输组件与温度传感网络连接，进行光信号的传输；光电信号发射与传输组件与光电信号转化与处理组件连接，将温度传感网络输入的光信号传输至光电信号转化与处理组件。The micro-controller is respectively connected with the photoelectric signal emission and transmission component, the photoelectric signal conversion and processing component; the photoelectric signal emission and transmission component is connected with the temperature sensing network to transmit the optical signal; the photoelectric signal emission and transmission component is connected with the photoelectric signal The conversion and processing component is connected to transmit the optical signal input by the temperature sensing network to the photoelectric signal conversion and processing component.

采用上述进一步方案的有益效果是：选用一个监测箱，将多个电路集成在监测箱中，既方便携带，又保护了电路免受环境影响。通过这些电路采集传感器数据，并将数据采集，滤波，转换为数字信号。The beneficial effect of adopting the above further solution is that a monitoring box is selected and a plurality of circuits are integrated in the monitoring box, which is convenient to carry and protects the circuits from environmental influences. Sensor data is collected through these circuits, and the data is collected, filtered, and converted into digital signals.

进一步，所述光电信号发射与传输组件，包括扫描光源、光纤耦合器、三端口光环形器；Further, the photoelectric signal emission and transmission component includes a scanning light source, a fiber coupler, and a three-port optical circulator;

所述微控制器与扫描光源电路信号输入端相连；The microcontroller is connected to the signal input end of the scanning light source circuit;

扫描光源输出光信号至光纤耦合器的输入端口，光纤耦合器的每个分路输出端口通过一个光环行器连接一个传感器串，每个光环行器余下的第三端口与光电信号转换与处理组件相连。The scanning light source outputs the optical signal to the input port of the fiber coupler, each split output port of the fiber coupler is connected to a sensor string through an optical circulator, and the remaining third port of each optical circulator is connected with the photoelectric signal conversion and processing component connected.

采用上述进一步方案的有益效果是：扫描光源将光源信号发出，通过光纤耦合器将光路分为多个通道，使得传感器可以同时多通道扫描。解决了现有技术扩展通道实时性差的缺陷。The beneficial effect of adopting the above further solution is: the scanning light source sends out the light source signal, and the optical path is divided into multiple channels through the fiber coupler, so that the sensor can scan multiple channels at the same time. The defect of poor real-time performance of the expansion channel in the prior art is solved.

进一步，所述扫描光源发射单通道C波段连续光谱；Further, the scanning light source emits a single-channel C-band continuous spectrum;

采用上述进一步方案的有益效果是：将C波段连续光谱用于扫描光源有利于光栅测温。The beneficial effect of adopting the above further solution is that the use of the C-band continuous spectrum for the scanning light source is beneficial to grating temperature measurement.

进一步，所述光电信号转化与处理组件，包括光电探测器、微弱信号处理器、AD转换器和数据采集器；Further, the photoelectric signal conversion and processing components include photodetectors, weak signal processors, AD converters and data collectors;

光电探测器与光环形器的第三端口相连；光电探测器与微弱信号处理器相连，微弱信号处理器输出的信号通过AD转换器进行模数转换后，经由数据采集器发送至微控制器。The photodetector is connected to the third port of the optical circulator; the photodetector is connected to the weak signal processor, and the signal output by the weak signal processor is converted to analog by the AD converter and sent to the microcontroller through the data collector.

采用上述进一步方案的有益效果是：将光信号转化为数字信号并将处理好的信号发送到微控制器，以获得监测温度。The beneficial effect of adopting the above further solution is: converting the optical signal into a digital signal and sending the processed signal to the microcontroller to obtain the monitored temperature.

进一步，所述用于地热浅井的多通道准分布式温度监测装置还包括电能供应电路，所述电能供应电路包括避雷设备和太阳能转化设备；所述监测箱内还设有与微控制器相连的电压转换控制电路；Further, the multi-channel quasi-distributed temperature monitoring device for geothermal shallow wells also includes a power supply circuit, the power supply circuit includes lightning protection equipment and solar energy conversion equipment; Voltage conversion control circuit;

所述避雷设备包括避雷针和接地导体，所述避雷针的针尖向上，并与所述接地导体良好连接；所述避雷针高度高于整个设备的顶端；The lightning protection device includes a lightning rod and a grounding conductor, the tip of the lightning rod is upward and is well connected to the grounding conductor; the height of the lightning rod is higher than the top of the entire device;

所述太阳能转化设备包括太阳能板、可充电锂电池组和智能太阳能充放电控制电路；太阳能电池板与智能太阳能充放电控制电路相连，智能太阳能充放电控制电路与可充电锂电池相连，智能太阳能充放电控制电路与电压转换控制电路相连，为整个装置供电。The solar energy conversion equipment includes a solar panel, a rechargeable lithium battery pack and an intelligent solar charge and discharge control circuit; the solar panel is connected with the intelligent solar charge and discharge control circuit, the intelligent solar charge and discharge control circuit is connected with the rechargeable lithium battery, and the intelligent solar charge The discharge control circuit is connected with the voltage conversion control circuit to supply power for the whole device.

采用上述进一步方案的有益效果是：通过太阳能转化的电能为这个设备的可充锂电电池供电，从而为整个设备供电，满足实际中野外监测过程中对供电的需求。The beneficial effect of adopting the above further solution is that the rechargeable lithium battery of the device is powered by the electric energy converted from solar energy, thereby powering the whole device and meeting the demand for power supply in the actual field monitoring process.

进一步，所述监测箱内还包括数据传输电路，监测箱外设置有数据传输天线，所述数据传输电路分别与微控制器和数据传输天线相连，通过数据传输天线发送数据至控制中心。Further, the monitoring box also includes a data transmission circuit, and a data transmission antenna is arranged outside the monitoring box, and the data transmission circuit is respectively connected with the microcontroller and the data transmission antenna, and sends data to the control center through the data transmission antenna.

采用上述进一步方案的有益效果是：将数据通过数据传输电路，经由天线发送到控制中心，使得监测到的数据可以在数据控制中心利用。The beneficial effect of adopting the above further scheme is that the data is sent to the control center through the data transmission circuit via the antenna, so that the monitored data can be used in the data control center.

本实用新型的其他特征和优点将在随后的说明书中阐述，并且，部分的优点从说明书中变得显而易见，或者通过实施本实用新型而了解。本实用新型的目的和其他优点可通过在所写的说明书、权利要求书以及附图中所特别指出的结构来实现和获得。Other features and advantages of the utility model will be set forth in the following description, and some advantages become obvious from the description, or can be understood by implementing the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

附图说明Description of drawings

附图仅用于示出具体实施例的目的，而并不认为是对本实用新型的限制，在整个附图中，相同的参考符号表示相同的部件。The drawings are only for the purpose of illustrating specific embodiments, and are not considered to limit the present utility model. Throughout the drawings, the same reference symbols represent the same components.

图1为本实用新型实施例用于地热浅井的多通道准分布式温度实时测试设备安装示意图，Fig. 1 is the schematic diagram of the installation of multi-channel quasi-distributed temperature real-time testing equipment for geothermal shallow wells according to the embodiment of the utility model,

图中标号：1-太阳能电池板、2-监测支架、3-数据传输天线、4-监测箱、5-通讯光缆、6-钢丝绳、7-地热浅井、8-回填固井、9-套管、10-固定卡具、11-温度传感器、12-重锤、13-避雷针、14-接地导体；Labels in the figure: 1-solar panel, 2-monitoring bracket, 3-data transmission antenna, 4-monitoring box, 5-communication optical cable, 6-steel wire rope, 7-geothermal shallow well, 8-backfill cementing, 9-casing , 10-fixing fixture, 11-temperature sensor, 12-weight hammer, 13-lightning rod, 14-grounding conductor;

图2为本实用新型实施例公开的地热浅井的多通道准分布式温度实时测试设备电路图。Fig. 2 is a circuit diagram of a multi-channel quasi-distributed temperature real-time testing device for geothermal shallow wells disclosed in an embodiment of the utility model.

具体实施方式Detailed ways

下面结合附图来具体描述本实用新型的优选实施例，其中，附图构成本申请一部分，并与本实用新型的实施例一起用于阐释本实用新型的原理。The preferred embodiments of the present utility model are specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present utility model to explain the principle of the present utility model.

本实用新型能够实现地热浅井特别是浅层地温能钻孔的准分布式温度监测、具有温度传感灵敏、传感器位置灵活布置、抗电磁干扰和不受复杂几何空间(如小孔径井眼)等较恶劣环境限制等特点。The utility model can realize the quasi-distributed temperature monitoring of geothermal shallow wells, especially shallow geothermal energy drilling, and has the advantages of sensitive temperature sensing, flexible arrangement of sensor positions, anti-electromagnetic interference, and free from complex geometric spaces (such as small-diameter boreholes), etc. Features such as harsh environment restrictions.

如图1所示，本实施例提供了一种地热浅井的多通道准分布式温度实时测试系统装置，包括太阳能板1、监测支架2、数据传输天线3、监测箱4和温度传感器11。As shown in FIG. 1 , this embodiment provides a multi-channel quasi-distributed temperature real-time testing system device for geothermal shallow wells, including a solar panel 1 , a monitoring bracket 2 , a data transmission antenna 3 , a monitoring box 4 and a temperature sensor 11 .

监测箱4安装在监测支架2的上端，监测箱4内部安装有电路板和可充电锂电池组。电路板包括电压转换电路、光电信号发射与传输组件、光电信号转化与处理组件、微控制器和数据传输电路；微控制器通过光电信号发射与传输组件与温度传感网络相连；温度传感网络与光电信号发射与传输组件相连，经由光电信号转化与处理组件，将采集到的数据发送到微控制器中。The monitoring box 4 is installed on the upper end of the monitoring bracket 2, and a circuit board and a rechargeable lithium battery pack are installed inside the monitoring box 4. The circuit board includes a voltage conversion circuit, a photoelectric signal emission and transmission component, a photoelectric signal conversion and processing component, a microcontroller and a data transmission circuit; the microcontroller is connected to the temperature sensing network through the photoelectric signal emission and transmission component; the temperature sensing network It is connected with the photoelectric signal emission and transmission component, and sends the collected data to the microcontroller through the photoelectric signal conversion and processing component.

优选地，太阳能电池板1安装在监测支架2的上端，通过电压转换电路与可充电锂电池组相连，为整个设备提供电能。Preferably, the solar panel 1 is installed on the upper end of the monitoring bracket 2, and is connected with a rechargeable lithium battery pack through a voltage conversion circuit to provide electric energy for the entire device.

具体地，太阳能电池板1完成太阳能向电能的转换，并通过智能太阳能充放电控制器储存到可充电锂电池组中；同时，可充电锂电池组通过智能太阳能充放电控制器为整个监测系统提供12V电源的供应。Specifically, the solar panel 1 completes the conversion of solar energy into electric energy, and stores it in the rechargeable lithium battery pack through the intelligent solar charge and discharge controller; at the same time, the rechargeable lithium battery pack provides the entire monitoring system with the intelligent solar charge and discharge controller. 12V power supply.

优选地，还包括避雷设备，所述避雷设备包括避雷针13和接地导体14，避雷针13的高度高于监测支架2的高度。Preferably, a lightning protection device is also included, and the lightning protection device includes a lightning rod 13 and a grounding conductor 14 , and the height of the lightning rod 13 is higher than that of the monitoring support 2 .

具体地，光电信号发射与传输组件包括扫描光源、光纤耦合器、三端口光环形器；微控制器与扫描光源信号控制端相连，扫描光源输出光信号至光纤耦合器的输入端口，光纤耦合器的每个分路端口通过一个光环行器连接一个传感器串，每个光环行器余下的第三端口与光电信号转换与处理组件相连。Specifically, the photoelectric signal emission and transmission component includes a scanning light source, a fiber coupler, and a three-port optical circulator; the microcontroller is connected to the signal control terminal of the scanning light source, and the scanning light source outputs an optical signal to the input port of the fiber coupler Each branching port of each optical circulator is connected to a sensor string through an optical circulator, and the remaining third port of each optical circulator is connected to a photoelectric signal conversion and processing component.

优选地，扫描光源发射单通道C波段(1527-1568nm)连续光谱，进入光纤耦合器分为多路光信号同时扫描，理论上可实现2n(n＝0,1,2,3,......)路光信号的同时扫描，但是由于每一阶耦合器都存在损耗，为了保证光信号探测与传输的有效性，建议n的取值小于等于4。每通道光信号分别进入独立的三端口光环行器电路的端口1，并从端口2进入温度传感器，温度传感器中携带温度信息的光信号通过三端口光环行器的端口2进入，并通过端口3进入到光电信号转化与处理组件。光环行器能够实现对入射光和反射光的分离，保证了光信号的互不干扰，实现发射信号与数据信号的有效区分。Preferably, the scanning light source emits a single-channel C-band (1527-1568nm) continuous spectrum, which enters the fiber coupler and divides it into multiple optical signals for simultaneous scanning. In theory, 2n (n=0,1,2,3,... ...) simultaneous scanning of optical signals, but due to the loss of each stage coupler, in order to ensure the effectiveness of optical signal detection and transmission, it is recommended that the value of n be less than or equal to 4. The optical signal of each channel enters port 1 of the independent three-port optical circulator circuit, and enters the temperature sensor from port 2, and the optical signal carrying temperature information in the temperature sensor enters through port 2 of the three-port optical circulator, and passes through port 3 Enter the photoelectric signal conversion and processing components. The optical circulator can realize the separation of the incident light and the reflected light, ensure that the optical signals do not interfere with each other, and realize the effective distinction between the transmitted signal and the data signal.

具体地，光电信号转化与处理组件包括光电探测器、微弱信号处理器、AD转换器和数据采集器。光环形器电路与光电探测器的地三端口相连；光电探测器与微弱信号处理器相连，微弱信号处理器输出的信号通过AD转换器进行模数转换后，经由数据采集器发送至微控制器。Specifically, the photoelectric signal conversion and processing components include photodetectors, weak signal processors, AD converters and data collectors. The optical circulator circuit is connected to the three ground ports of the photodetector; the photodetector is connected to the weak signal processor, and the signal output by the weak signal processor is converted from analog to digital by the AD converter and sent to the microcontroller through the data collector .

具体地，微控制器包括数据存储电路和微处理器。将光电信号转化与处理组件转化的数据发送到微处理器中，微处理器并将数据存储到数据存储电路中，再由数据传输电路发送到数据控制中心。Specifically, a microcontroller includes a data storage circuit and a microprocessor. The data converted by the photoelectric signal conversion and processing component is sent to the microprocessor, and the microprocessor stores the data in the data storage circuit, and then is sent to the data control center by the data transmission circuit.

需要说明的是，微控制器采用现有多种芯片均可实现，其仅是激励扫描光源发射光波，将输入的传感终端数据存储在内存器内，控制电压的转换，其程序为常规程序，本实施例不涉及对微控制器中程序协议的改进。It should be noted that the microcontroller can be realized by using various existing chips. It only excites the scanning light source to emit light waves, stores the input sensing terminal data in the memory, and controls the conversion of the voltage. The program is a conventional program , this embodiment does not involve the improvement of the program protocol in the microcontroller.

温度传感器11通过通讯光缆5与监测箱4内部的光环形器相连。The temperature sensor 11 is connected with the optical circulator inside the monitoring box 4 through the communication optical cable 5 .

具体地，温度传感器11由多通道光纤布拉格光栅温度传感器(FBG)串组成，每个光纤布拉格光栅温度传感器串至少串联1支高精度温度传感器，通过光栅传感器波长变化反应传感器周围温度情况。Specifically, the temperature sensor 11 is composed of multi-channel fiber Bragg grating temperature sensor (FBG) strings, and each fiber Bragg grating temperature sensor string is connected in series with at least one high-precision temperature sensor, and the temperature around the sensor is reflected by the wavelength change of the grating sensor.

以下以一具体安装实例，说明本实施例的监测装置的安装及原理。The installation and principle of the monitoring device of this embodiment will be described below with a specific installation example.

根据浅层地温能开发利用模式，不同的钻孔类型与利用方法，可分别结合本实用新型实施例的监测装置分别开展监测工作。According to the development and utilization mode of shallow geothermal energy, different drilling types and utilization methods can be combined with the monitoring device of the embodiment of the utility model to carry out monitoring work respectively.

具体地，背景值监测孔一般为单孔单通道，通道径约100mm，可通过利用本实用新型实施例的多通道开展准分布式分层监测；勘查换热试验孔一般单孔多通道，通道在井下采用连接，形成双通道U型管，单通道直径约32mm，可结合多通道分别监测；开发利用孔一般为双孔(开采孔和注水孔)单通道或多通道，单通道直径约为32mm，可利用多通道分别对开采孔和注水孔分别监测。Specifically, the background value monitoring hole is generally a single hole and a single channel, and the channel diameter is about 100 mm, and quasi-distributed layered monitoring can be carried out by utilizing the multi-channel of the embodiment of the utility model; The connection is adopted in the downhole to form a double-channel U-shaped pipe. The diameter of a single channel is about 32mm, which can be combined with multiple channels for separate monitoring; the development and utilization holes are generally double-hole (production hole and water injection hole) single-channel or multi-channel, and the diameter of a single channel is about 32mm. 32mm, multi-channel can be used to monitor the production hole and water injection hole separately.

在浅层地温能浅孔成孔后，下井镀锌套管(或PE型U型管)，通过上返岩屑、原浆进行灌浆浇筑或根据监测要求采用膨润土、水泥、砂和水的混合料，也可根据原位土回填以增加换热准确性回填，确保套管与井壁完整耦合无间隙。After the shallow ground temperature can form a shallow hole, go down the galvanized casing (or PE-type U-shaped pipe), and carry out grouting by returning rock cuttings and original slurry or using a mixture of bentonite, cement, sand and water according to monitoring requirements It can also be backfilled according to the in-situ soil to increase the accuracy of heat transfer and ensure that the casing and the well wall are completely coupled without gaps.

通过轻便绞车将温度传感网络的传感器串与下井钢丝绳通过钢卡捆绑下井，钢丝绳尾端固定重锤，保证钢丝绳保持垂向下井，每个传感器分别固定在钢丝绳上，利用钢丝绳承担主要垂向拉力，以避免温度传感器因为自身重力造成测量误差和损坏。The sensor string of the temperature sensing network and the downhole steel wire rope are bound to go down the well through a light winch, and the end of the steel wire rope is fixed with a weight to ensure that the steel wire rope remains vertical downhole. Each sensor is fixed on the steel wire rope, and the steel wire rope is used to bear the main vertical tension. To avoid measurement errors and damage to the temperature sensor due to its own gravity.

记录传感器串的通道和下放的位置，将钢丝绳通过捆绑固定在地面井口套管处，使钢丝绳与套管相对固定，以免套管沉降影响监测数据。Record the channel and lowering position of the sensor string, and fix the wire rope to the ground wellhead casing by bundling, so that the wire rope and the casing are relatively fixed to prevent the casing settlement from affecting the monitoring data.

用于地热浅井的多通道准分布式温度监测装置还包括电能供应电路，其中，电能供应电路包括避雷设备和太阳能转化设备。避雷设备包括避雷针和接地导体，所述避雷针的针尖向上，并与所述接地导体良好连接，并且避雷针高度高于整个设备的顶端。The multi-channel quasi-distributed temperature monitoring device for geothermal shallow wells also includes a power supply circuit, wherein the power supply circuit includes lightning protection equipment and solar energy conversion equipment. The lightning protection device includes a lightning rod and a grounding conductor. The tip of the lightning rod is upward and well connected to the grounding conductor, and the height of the lightning rod is higher than the top of the entire device.

太阳能转化设备包括太阳能板、可充电锂电池组和智能太阳能充放电控制电路；太阳能电池板与智能太阳能充放电控制电路相连，智能太阳能充放电控制电路与可充电锂电池相连，智能太阳能充放电控制电路与电压转换控制电路相连，为整个装置供电。Solar energy conversion equipment includes solar panels, rechargeable lithium battery packs and intelligent solar charge and discharge control circuits; solar panels are connected to intelligent solar charge and discharge control circuits, intelligent solar charge and discharge control circuits are connected to rechargeable lithium batteries, and intelligent solar charge and discharge control circuits The circuit is connected with the voltage conversion control circuit to supply power for the whole device.

固定监测支架及避雷套件，安装太阳能电池板、监测箱，连接导线并分别将温度传感网络按照通道连接至地面监测系统的光环行器接口法兰。Fix the monitoring bracket and lightning protection kit, install the solar panel and the monitoring box, connect the wires and connect the temperature sensing network to the optical circulator interface flange of the ground monitoring system according to the channels.

以下以一具体使用实例，说明本实施例的监测装置的使用。The use of the monitoring device of this embodiment will be described below with a specific use example.

启动监测系统电源，微控制器通过向扫描光源发出控制信号(包括：扫描间隔和波长范围等)，激光信号进入光纤耦合器组分成多通道光信号，每个通道光信号分别经过一个三端口的光环行器进入到固定的传感器串中。Start the power supply of the monitoring system, the microcontroller sends a control signal (including: scanning interval and wavelength range, etc.) Optical circulators go into fixed sensor strings.

温度传感器的预刻栅格会反射激光信号，在受到外界温度变化后，预刻光栅栅格会跟随变化，其表现形式为所反射的波长偏离传感器初始状态的中心波长，偏移量受传感器自身系数和环境温度控制，传感器自身系数为常数，实验室内测定，因此光栅反射波长偏移量(测试波长与中心波长的波长差)与环境温度变化量(测试环境与标定环境的温度差)成正比例关系。The pre-engraved grid of the temperature sensor will reflect the laser signal. After the external temperature changes, the pre-engraved grating grid will change accordingly. Coefficient and ambient temperature control, the coefficient of the sensor itself is a constant, measured in the laboratory, so the grating reflection wavelength offset (the wavelength difference between the test wavelength and the central wavelength) is proportional to the ambient temperature change (the temperature difference between the test environment and the calibration environment) Proportional relationship.

具体地，监测箱外还设置有数据传输天线，数据传输电路分别与微控制器和数据传输天线相连，通过数据传输天线发送数据至控制中心。携带温度信息的反射波长经过光环行器进入到光电探测组件转换为微弱电信号，经过整形、放大、模拟信号转化为数字信号后进入采集模块数据采集，并将最终的数据通过微处理器模块处理后保存至数据存储模块并利用天线和无线公网发送至数据控制中心。Specifically, a data transmission antenna is provided outside the monitoring box, and the data transmission circuit is respectively connected with the microcontroller and the data transmission antenna, and the data is sent to the control center through the data transmission antenna. The reflected wavelength carrying temperature information enters the photoelectric detection component through the optical circulator and converts it into a weak electrical signal. After shaping, amplifying, and converting the analog signal into a digital signal, it enters the acquisition module for data acquisition, and the final data is processed by the microprocessor module. Then save it to the data storage module and send it to the data control center by using the antenna and wireless public network.

综上所述，本实用新型实施例提供了一种用于地热浅井的多通道准分布式温度监测装置，实现了浅层地温能地热浅井的准分布式温度测量，具有通道可扩展、传感器串联数量多、抗电磁干扰和不受复杂几何空间等恶劣环境的限制等特点，每通道通过单芯普通通讯光缆连接即可实现温度信号的传输，同时随着孔内温度测试空间分辨率的增加，单位信息的获取成本大大降低，对于浅井高精度温度数据的长期网络化测量提供了一种有效的监测技术。In summary, the embodiment of the utility model provides a multi-channel quasi-distributed temperature monitoring device for shallow geothermal wells, which realizes the quasi-distributed temperature measurement of shallow geothermal energy geothermal shallow wells, and has expandable channels and series sensors It has the characteristics of large quantity, anti-electromagnetic interference, and not being restricted by harsh environments such as complex geometric spaces. Each channel can be connected by a single-core ordinary communication optical cable to realize the transmission of temperature signals. At the same time, with the increase of the spatial resolution of the temperature test in the hole, The acquisition cost of unit information is greatly reduced, and it provides an effective monitoring technology for long-term networked measurement of high-precision temperature data in shallow wells.

以上所述，仅为本实用新型较佳的具体实施方式，但本实用新型的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本实用新型揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本实用新型的保护范围之内。The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model.