CN109461282A - A kind of device and method monitoring temperature - Google Patents
- ️Tue Mar 12 2019
Technical field
The present invention generally relates to wisdom fire-fighting fields, in particular to a kind of device for monitoring temperature.In addition, The invention further relates to a kind of methods for monitoring temperature.
Background technique
With the increase of indoor electric appliance, the frequency that fire occurs is higher and higher.In addition, with the liter year by year of Global Temperature Fire also occurs often in the outdoor location of height, such as forest or open storage etc.Fire once occurs, it will usually rapidly Development and sprawling speed, easily cause the great person and property loss.The early warning early of fire is to reduce fire risk and loss Important means.
Current fire alarm monitoring mainly uses the technologies such as heat detector, smoke detector, flame image identification to supervise Depending on place to be monitored.However, these monitoring technology are only capable of alarming after on fire smolder, before can not carrying out calamity before on fire smolder Early warning.And it is on fire smolder after, fire can be rapidly developed and be spread, less by rescue personnel is left for if just alarmed at this time Time disposes fire behavior and carries out rescue.In addition, temperature-sensitive smoke detector is generally single-point monitoring, monitoring range is smaller, Project amount is big, is difficult to carry out effective position to point of origin, and be not suitable for outdoor location.And the identification of flame figure is then by luminous environment It influences seriously, and has the environment of secret protection requirement that should not use.
Need at present it is a kind of can be in EARLY RECOGNITION fire risk, the wider array of temperature monitoring means of more efficient and applicable surface.
Summary of the invention
The task of the present invention is the device and method for providing a kind of monitoring temperature can be in fire by the device or method Calamity getting up early identifies fire risk before on fire smolder, and the device or method can be in larger place to be monitored effectively Ground positions fiery point, and the device or method are not by environment shadow sound and there is no invade privacy of user problem.
In the first aspect of the present invention, which is solved by a kind of device for monitoring temperature, which includes:
Thermal imaging camera is configured as executing following movement:
In the first thermal image for shooting place to be monitored at the first time；And
The second time after the first time shoots second thermal image in place to be monitored；And
Controller is configured as executing following movement:
Identify the first temperature in the first thermal image；
Identify the second temperature in the second thermal image；
The temperature rise rate in place to be monitored is determined according to the first temperature and second temperature and first time and the second time； And
Warning information is exported when temperature rise rate is higher than temperature rise threshold value.
In the present invention, controller can be realized with software, hardware or firmware or combinations thereof.Controller both can be independent In the presence of being also possible to a part of some component.
It is provided in a preferred embodiment of the invention, the temperature rise rate threshold value is 20 DEG C/min.By the way that the temperature is arranged Rate-valve value is risen, it can be preferably in EARLY RECOGNITION major part fire risk.Under the teachings of the present invention, according to different application field It closes, other temperature rise rate threshold values are also can sets itself.
It provides in another preferred embodiment of the invention, the controller is additionally configured to execute following movement:
Multiple threshold value of warning are provided, the threshold value of warning includes highest threshold value of warning and minimum threshold value of warning；
Identify the second maximum temperature in the second thermal image；
The second maximum temperature is subtracted into temperature deviation to be deviated when the second maximum temperature is greater than minimum threshold value of warning Temperature；And
Warning information is exported when offset temperatures are greater than minimum threshold value of warning.
By the preferred embodiment, fire wind can be efficiently identified by repeatedly measuring the maximum temperature in place to be monitored Danger.
It is provided in another preferred embodiment of the invention, the controller is additionally configured to execute following movement:
The first maximum temperature in the first thermal image is identified when offset temperatures are less than minimum threshold value of warning；And
Warning information is exported when the first maximum temperature is greater than minimum threshold value of warning.
By the preferred embodiment, fire wind can be efficiently identified by repeatedly measuring the maximum temperature in place to be monitored Danger.
It provides in another preferred embodiment of the invention, the controller is additionally configured to execute following movement:
The first maximum temperature is compared with minimum threshold value of warning when the second maximum temperature is less than minimum threshold value of warning；
The first maximum temperature be greater than minimum threshold value of warning when determine in the multiple threshold value of warning with the first maximum temperature Corresponding threshold value of warning, wherein threshold value of warning corresponding with the first maximum temperature is following threshold value of warning: first highest temperature Degree is higher than the threshold value of warning but is less than the higher threshold value of warning adjacent with the threshold value of warning；
First maximum temperature is subtracted into threshold value of warning corresponding with the first maximum temperature to obtain offset temperatures；And
Warning message is exported when the second maximum temperature is greater than the offset temperatures.
By the preferred embodiment, fire wind can be efficiently identified by repeatedly measuring the maximum temperature in place to be monitored Danger.
It is provided in an expansion scheme of the invention, output warning information includes:
Determine current alert level；And
Warning information is answered according to current alert level output phase.
By the expansion scheme, the alarm of different stage can be exported, corresponding measure is thus conveniently taken.
It is provided in a preferred embodiment of the invention, determines that Alert Level includes:
When Alert Level corresponding with the second maximum temperature is greater than Alert Level corresponding with the first maximum temperature Second maximum temperature is subtracted into temperature deviation to obtain offset temperatures；
When Alert Level corresponding with the offset temperatures is greater than Alert Level corresponding with the first maximum temperature Alert Level corresponding with the second maximum temperature is determined as current alert level；And
When Alert Level corresponding with the offset temperatures is equal to Alert Level corresponding with the first maximum temperature Alert Level corresponding with the first maximum temperature is determined as current alert level.
By the preferred embodiment, Alert Level can be determined according to the maximum temperature for repeatedly measuring place to be monitored, by This conveniently takes corresponding measure.
It provides in another preferred embodiment of the invention, determines Alert Level further include:
When Alert Level corresponding with the second maximum temperature is less than Alert Level corresponding with the first maximum temperature Threshold value of warning corresponding with the first maximum temperature is subtracted into temperature deviation to obtain offset temperatures；
Alert Level corresponding with the first temperature is determined as working as when the second maximum temperature is greater than the offset temperatures Preceding Alert Level；And
Alert Level corresponding with second temperature is determined as working as when the second maximum temperature is less than the offset temperatures Preceding Alert Level.
By the preferred embodiment, Alert Level can be determined according to the maximum temperature for repeatedly measuring place to be monitored, by This conveniently takes corresponding measure.
It is provided in another preferred embodiment of the invention, determines Alert Level further include:
When Alert Level corresponding with the second maximum temperature is equal to Alert Level corresponding with the first maximum temperature Alert Level corresponding with second temperature is determined as current alert level.
By the preferred embodiment, Alert Level can be determined according to the maximum temperature for repeatedly measuring place to be monitored, by This conveniently takes corresponding measure.
It is provided in an expansion scheme of the invention, the multiple threshold value of warning includes: 40 DEG C, 80 DEG C, 190 DEG C；With/ Or
The temperature deviation is 2 DEG C.
By the expansion scheme, the fire risk of coal-fired class combustible can be identified well.
In the second aspect of the present invention, foregoing task is solved by a kind of method for monitoring temperature, under this method includes Column step:
By thermal imaging camera in the first thermal image for shooting place to be monitored at the first time；And
Second thermal image in place to be monitored is shot by the second time of thermal imaging camera after the first time；
Identify the first temperature in the first thermal image；
Identify the second temperature in the second thermal image；
The temperature rise rate in place to be monitored is determined according to the first temperature and second temperature and first time and the second time； And
Warning information is exported when temperature rise rate is higher than temperature rise threshold value.
It is provided in a preferred embodiment of the invention, this method further includes the following steps:
Multiple threshold value of warning are provided, the threshold value of warning includes highest threshold value of warning and minimum threshold value of warning；
Identify the second maximum temperature in the second thermal image；
The second maximum temperature is subtracted into temperature deviation to be deviated when the second maximum temperature is greater than minimum threshold value of warning Temperature；And
Warning information is exported when offset temperatures are greater than minimum threshold value of warning.
The first maximum temperature in the first thermal image is identified when offset temperatures are less than minimum threshold value of warning；And
Warning information is exported when the first maximum temperature is greater than minimum threshold value of warning.
It provides in another preferred embodiment of the invention, method further includes the following steps:
The first maximum temperature is compared with minimum threshold value of warning when the second maximum temperature is less than minimum threshold value of warning；
The first maximum temperature be greater than minimum threshold value of warning when determine in the multiple threshold value of warning with the first maximum temperature Corresponding threshold value of warning, wherein threshold value of warning corresponding with the first maximum temperature is following threshold value of warning: first highest temperature Degree is higher than the threshold value of warning but is less than the higher threshold value of warning adjacent with the threshold value of warning；
First maximum temperature is subtracted into threshold value of warning corresponding with the first maximum temperature to obtain offset temperatures；And
Warning message is exported when the second maximum temperature is greater than the offset temperatures.
It is provided in another preferred embodiment of the invention, this method further includes the following steps:
The first maximum temperature in the first thermal image is identified when offset temperatures are less than minimum threshold value of warning；And
Warning information is exported when the first maximum temperature is greater than minimum threshold value of warning.
The present invention at least has following the utility model has the advantages that (1) in fire getting up early, i.e. on fire by the invention it is possible to smolder Preceding identification fire risk, this is seeing clearly as follows based on the present inventor: the development process of fire are as follows: heating up, glow, smolder On fire, flare has been leapt up, the intensity of a fire expands, high fire combustion gas forms fire, explosion, that is to say, that inflammable before on fire smolder Object has the energy accumulation of significant period of time, and in this stage by the accumulation of energy, the temperature of combustibles can be gradually risen, The variation that its temperature such as can have both been monitored in this stage, then can give warning in advance and avoid the generation of the condition of a disaster.If it is possible to rising Mildly glow the stage identification fire risk, then can be effectively prevented from the formation of fire, otherwise smolder it is on fire after, leave for fire fighting people The Deal with Time of member will be considerably less, and the present invention, can be true by analyzing by thermal imagery camera temperature data detected thus Determine temperature rise rate and temperature trend, thus effectively can identify fire risk in the earliest period of fire development, be won for artificial treatment Grace time is taken, fire probability is greatly reduced；(2) present invention, can be to view by thermal imaging camera temperature collection data All pixels point in open country independently obtains temperature value and does alarm decision, thus can quick lock in heat up region, so as to The fire hazard monitoring in larger range is effectively realized, and installing engineering amount is small, is not influenced by environment light condition, in addition, thermal imaging Camera will not invade privacy of user, therefore application range of the invention is wider.
Detailed description of the invention
With reference to specific embodiment, the present invention is further explained with reference to the accompanying drawing.
Fig. 1 shows the schematic diagram of the device of monitoring temperature according to the present invention；And
Fig. 2 shows the processes of the method for monitoring temperature according to the present invention.
Detailed description of the invention
It should be pointed out that each component in each attached drawing may be shown in which be exaggerated in order to illustrate, and it is not necessarily ratio Example is correctly.In the drawings, identical appended drawing reference is equipped with to the identical component of identical or function.
In the present invention, unless otherwise indicated, " on being arranged in ... ", " being arranged in ... top " and " on being arranged in ... " Do not exclude the case where there are intermediaries therebetween.
In the present invention, each embodiment is intended only to illustrate the solution of the present invention, and is understood not to restrictive.
In the present invention, unless otherwise indicated, quantifier "one", " one " and the scene for not excluding element.
It is also noted herein that in an embodiment of the present invention, for it is clear, for the sake of simplicity, might show only one Sub-unit or component, but those skilled in the art are it is understood that under the teachings of the present invention, it can be according to concrete scene Need to add required component or component.
It is also noted herein that within the scope of the invention, the wording such as " identical ", " equal ", " being equal to " are not meant to The two numerical value is absolutely equal, but allows certain reasonable error, that is to say, that the wording also contemplated " substantially phase Together ", " being essentially equal ", " being substantially equal to ".
In addition, the number of the step of each method of the invention limit the method step execute sequence.Unless special It does not point out, various method steps can be executed with different order.
Finally, in the present invention, term " thermal imaging camera " covers the various thermal imagings that thermal image can be generated and sets Standby, such as thermal imaging system, night vision device, infrared heat sensor.
Ideas based on the present invention is that different monitoring articles has respective burning point, it is assumed that the ignition point of certain class fire coal Be 190 to 270 DEG C, but due to the coal-fired vaporization of itself and the influence of environmental factor, can be gathered inside dump heat and It is vaporized with combustible, the combustible output being vaporized with can be accelerated when accumulated inside heat reaches 40 DEG C, when what is be vaporized with Combustible concentration reaches certain value, and when the thermal temperature of accumulated inside reaches 80 degrees Celsius, dump will glow in inside, When the area that glows can be gradually expanded in turn, while reaching coal-fired ignition point with the generation temperature glowed, the intensity of a fire will be rapid Expand the generation for eventually leading to the condition of a disaster.In this above-mentioned scene, three different grades of monitoring, alarming threshold values (40 can be set DEG C, 80 DEG C, 190 DEG C), and the temperature variations of dump are monitored in real time, when the single temperature spot at a certain moment reaches warning level The alarm of corresponding grade will be triggered when value.At the same time it can also be alarmed according to the burning feature for not having to article using temperature rise rate (such as alarm threshold value is 20 DEG C/min, and alarm is triggered when temperature rise rate reaches 20 DEG C/mi n), i.e., adopt according to multiple time points The temperature of collection calculates actual temperature rise rate.
The present invention has a characteristic that
1) it can be detected the variation of temperature in the temperature rise period and carry out early warning, can find fire hazard early；
2) large area monitoring can be carried out by video technique, installing engineering amount is small；
3) temperature value is independently obtained to all pixels point in the visual field, and does alarm decision.Thus quick lock in liter Temperature area；
4) infrared thermal imaging technique is not influenced by light, smog etc., is different from ordinary video, is particularly suitable for having secret protection It is required that environment.
Fig. 1 shows the schematic diagram of the device 100 of monitoring temperature according to the present invention.
As shown in Figure 1, the device 100 of monitoring temperature includes thermal imaging camera 101 and controller, is herein server 102.Thermal imaging camera 101 accesses internet 103 by wired or wireless connection, to communicate with server 102.User sets Standby 106 also by wirelessly or non-wirelessly connection access internet, to communicate with server 102 so as on user equipment 106 Warning information is remotely received in application program 107.Communication between each equipment can be coded communication to increase safety.With Family equipment 106 can also be authenticated to server 102 to ensure that the user is legitimate user.
Each component of the device 100 of monitoring temperature is described below:
Thermal imaging camera 101, such as can be infrared thermal imager.Thermal imaging camera 101 is configured as holding The following movement of row:
In the first thermal image for shooting place 104 to be monitored at the first time.It is for example stacked on place 104 to be monitored Combustibles 105.Thermal imaging camera 101 for example can regularly shoot one or more thermal images in monitoring place 104, and Comprehensive is an overall thermal image, which covers whole or most places.
The second time after the first time shoots second thermal image in place to be monitored.When second time is with first Between between interval can be regularly perhaps at random this can be provided by user or by factory pre-sets.For example, second It is divided between time and first time 1 minute.
Controller is herein server 102, and in other embodiments, controller is also possible to local device.Controller Or server 102 its be configured as executing following movement:
Identify the first temperature in the first thermal image.First temperature can be maximum temperature in the first thermal image, flat The temperature of equal temperature or any pixel.The identification process can for example carry out in the following way: determine in thermal image The color (or coloration or brightness) of pixel；It is for example determined using color-temperature table of comparisons according to identified color corresponding Temperature.
Identify the second temperature in the second thermal image.Second temperature can be maximum temperature in the second thermal image, flat The temperature of equal temperature or any pixel.
The temperature rise speed in place to be monitored is determined according to the first temperature and second temperature and first time and the second time Rate.Such as second temperature can be subtracted to the first temperature difference and determine temperature rise speed divided by the difference of the second time and the second time Rate.
Warning information is exported when temperature rise rate is higher than temperature rise threshold value.The temperature rise rate threshold value is, for example, 20 DEG C/minute Clock.
In addition, controller or server 102 are optionally additionally configured to execute following movement:
(1) temperature alarming is intended to combine the maximum temperature (the first maximum temperature) of last acquisition and currently acquires Maximum temperature (the second maximum temperature) determines that fire risk, temperature alarming include the following steps:
Multiple threshold value of warning are provided, the threshold value of warning includes highest threshold value of warning and minimum threshold value of warning.It is described pre- Alert threshold value can for example be sized: minimum threshold value of warning, secondary low threshold value of warning, intermediate threshold value of warning, secondary high threshold value of warning, Highest threshold value of warning.
Identify the second maximum temperature in the second thermal image.For example, can recognize the temperature of all pixels point in thermal image Degree, and determine the maximum temperature in these temperature.Or it can also directly be directly determined according to color (or coloration or brightness) Maximum temperature.
The second maximum temperature is subtracted into temperature deviation to obtain partially when the second maximum temperature is greater than minimum threshold value of warning Move temperature." temperature deviation " is the fixed temperature numerical value that can be customized by users, for example, can according to user or scene Actual demand defines, but ± 2 DEG C be also possible to other temperature values." temperature deviation " is aimed to solve the problem that in proximity sensing threshold value It is frequently reported by mistake due to caused by the narrow drift of actual monitoring regional temperature when critical point.
Warning information is exported when offset temperatures are greater than minimum threshold value of warning.
The first maximum temperature in the first thermal image is identified when offset temperatures are less than minimum threshold value of warning.
Warning information is exported when the first maximum temperature is greater than minimum threshold value of warning.
The first maximum temperature is compared with minimum threshold value of warning when the second maximum temperature is less than minimum threshold value of warning.
The first maximum temperature be greater than minimum threshold value of warning when determine in the multiple threshold value of warning with first highest temperature Corresponding threshold value of warning is spent, wherein threshold value of warning corresponding with the first maximum temperature is following threshold value of warning: the first highest Temperature is higher than the threshold value of warning but is less than the higher threshold value of warning adjacent with the threshold value of warning.
First maximum temperature is subtracted into threshold value of warning corresponding with the first maximum temperature to obtain offset temperatures.
Warning message is exported when the second maximum temperature is greater than the offset temperatures.
(2) alert levels are segmented, and are intended to provide the alarm of different stage, alert levels subdivision according to different fire risks Include:
It is greater than Alert Level corresponding with the first maximum temperature in Alert Level corresponding with the second maximum temperature When the second maximum temperature subtracted into temperature deviation to obtain offset temperatures.
It is greater than Alert Level corresponding with the first maximum temperature in Alert Level corresponding with the offset temperatures When Alert Level corresponding with the second maximum temperature is determined as current alert level.
It is equal to Alert Level corresponding with the first maximum temperature in Alert Level corresponding with the offset temperatures When Alert Level corresponding with the first maximum temperature is determined as current alert level.
It is less than Alert Level corresponding with the first maximum temperature in Alert Level corresponding with the second maximum temperature When threshold value of warning corresponding with the first maximum temperature subtracted into temperature deviation to obtain offset temperatures.
Alert Level corresponding with the first temperature is determined as when the second maximum temperature is greater than the offset temperatures Current alert level.
Alert Level corresponding with second temperature is determined as when the second maximum temperature is less than the offset temperatures Current alert level.
In addition, temperature rise rate early warning can also take multiple warning levels.In this case, when temperature pre-warning rank is big When rate warning level, temperature pre-warning rank is taken.When rate warning level is greater than temperature pre-warning rank, rate early warning grade is taken Not.If two equal, temperature pre-warning rank is taken.Furthermore, it is possible to obtain thermal imaging apparatus sequence number, monitored picture channel Number, early warning creation time, the type of warning level, rank title, maximum temperature, minimum temperature, mean temperature, Current Temperatures in Last time temperature-difference, monitoring area screen shot, monitoring area grayscale image, in entire monitoring area each point pulse compression at File is sent to server parsing.
The present invention at least has following the utility model has the advantages that (1) in fire getting up early, i.e. on fire by the invention it is possible to smolder Preceding identification fire risk, this is seeing clearly as follows based on the present inventor: the development process of fire are as follows: heating up, glow, smolder On fire, flare has been leapt up, the intensity of a fire expands, high fire combustion gas formed fire, explosion, if it is possible to heat up and glow the stage identification Fire risk can then be effectively prevented from the formation of fire, otherwise smolder it is on fire after, the Deal with Time for leaving firefighter for will Considerably less, the present invention can determine temperature rise rate and temperature by analysis by thermal imagery camera temperature data detected thus Thus trend effectively can identify fire risk in the earliest period of fire development, get grace time for artificial treatment, substantially drop Low fire probability；(2) present invention, can be only to all pixels point in the visual field by thermal imaging camera temperature collection data On the spot obtain and temperature value and do alarm decision, thus can quick lock in heat up region, so as to effectively realize larger range Interior fire hazard monitoring, and installing engineering amount is small, is not influenced by environment light condition, in addition, thermal imaging camera will not invade use Family privacy, therefore application range of the invention is wider.
Fig. 2 shows the processes of the method for monitoring temperature according to the present invention.
In step 202, by thermal imaging camera in the first thermal image for shooting place to be monitored at the first time.
In step 204, the of place to be monitored is shot by the second time of thermal imaging camera after the first time Two thermal images.
In step 206, the first temperature in the first thermal image is identified.
In step 208, the second temperature in the second thermal image is identified.
In step 210, place to be monitored is determined according to the first temperature and second temperature and first time and the second time Temperature rise rate.
In step 212, warning information is exported when temperature rise rate is higher than temperature rise threshold value.
Although some embodiments of the present invention are described in present specification, those skilled in the art Member is it is understood that these embodiments are merely possible to shown in example.Those skilled in the art under the teachings of the present invention may be used To expect numerous variant schemes, alternative solution and improvement project without beyond the scope of this invention.The appended claims purport It is limiting the scope of the invention, and is covering the method in the range of these claims itself and its equivalents and knot whereby Structure.