CN107590942B - One kind being based on array temperature test type fire alarm and detection method - Google Patents
One kind being based on array temperature test type fire alarm and detection method Download PDFInfo
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- CN107590942B CN107590942B CN201710864601.0A CN201710864601A CN107590942B CN 107590942 B CN107590942 B CN 107590942B CN 201710864601 A CN201710864601 A CN 201710864601A CN 107590942 B CN107590942 B CN 107590942B
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Abstract
The invention discloses one kind to be based on array temperature test type fire alarm and detection method, including signal processor, detector, signal conditioning unit, warning circuit, control circuit and memory.The system of fire alarm and detector are initialized when use；It is corrected using heterogeneity signal of the signal processor to all pixels point on detector, bad point correction, so that all pixels on detector are standard IR radiation signal；Signal processor carries out ambient temperature compensation to detector and atmospheric attenuation compensates；Detector carries out object temperature detection and passes to signal processor, and when the body surface temperature that detector detects is greater than 45 °, then starting warning circuit early warning, simultaneously photoelectricity prompts, if body surface temperature is greater than 60 °, then start warning circuit alarm, buzzer movement, status data uploads memory.This programme is by above-mentioned principle, the direct measurement temperature that causes object of fire itself, rather than environment temperature, and alarm is quick and precisely.
Description
Technical field
The present invention relates to security against fire fields, and in particular to one kind is based on array temperature test type fire alarm and inspection
Survey method.
Background technique
Existing fire-alarm can divide 4 major class by detection method substantially: 1, feeling cigarette type: the smoke particle in detection air
Concentration；2, detection temperature sensitive type: is made to variation of ambient temperature；3, it photosensitive type: makes a response to ambient light Strength Changes；4,
Gaseous type: abnormal gas concentration is made a response in detection air.It is technically waiting object for the second class temperature sensitive type detector
Burning or chemical change cause environment temperature to increase extremely, basic means and index as differentiation；Due to common detection member
Part is all semiconductor heat sensing device, such as thermistor, and the devices such as thermal diode, this kind of device is low with precision, environment temperature,
Humidity all has an impact to it, and detection also only limits the air themperature on this alarm periphery；It is equal to object to have blazed up,
The case where fire can just be detected；Traditional fire-fighting scene is all that selection smoke detector and hygrosensor cross-over configuration are installed,
Mutual supplement with each other's advantages can be played in this way, expand fire detection to accuracy and reliability.Nevertheless, this detection mode is still deposited
In following disadvantage: precision is low, and real-time is poor, does not reflect the variation of live flammable object own temperature, can not react has
High temp objects enter the region.This detection mode is not suitable for thermally sensitive place, such as archives, and museum refuels
It the important nurse place such as stands.
Summary of the invention
The technical problem to be solved by the present invention is to be improved to existing temperature sensitive type fire-alarm, real time reaction object
Body surface temperature, rather than environment temperature, reaction is fast, and precision is high, can real-time tracking object temperature change curve, it is therefore intended that mentions
It is based on array temperature test type fire alarm and detection method for one kind, directly measures the temperature for causing object of fire itself
The temperature accuracy of degree, rather than environment temperature, measurement is high, without just taking alarm action until object blazes up, fire extinguishing row
Dynamic to greatly speed up, extinguishing effect is more preferable.
The present invention is achieved through the following technical solutions:
One kind being based on array temperature test type fire alarm, including
Signal processor: right according to the pyroelectric infrared sensor temperature correction value of the different objects stored in memory
Detector carries out both full-pixel correction, the linear signal of heterogeneity signal processing of all pixels point on detector, so that visiting
Surveying all pixels on device is the progress real-time surface temperature detection of object after standard IR radiation signal, by ethernet communication side
The far red light analog electrical signal that detector transmits after formula reading correction, after being converted into digital signal by ADC, with storage
Preset temperature value in device is compared, and starts warning circuit early warning and photoelectricity prompt if body surface temperature is greater than 45 °, if
Body surface temperature is greater than 60 °, then starts warning circuit alarm, buzzer movement, status data upload server；
Detector: built-in pyroelectric infrared sensor is converted to for detection object to the far red light signal of external radiation
Electric signal is transferred to signal processor, real-time detection body surface temperature by transfer bus；
Signal conditioning unit: connecting with signal processor, more than communication digital signal modulated to 24v level, utilizes biography
Defeated bus is transmitted at a distance；
Warning circuit: receiving signal processor and send instruction, realizes that circuit early warning, alarm, photoelectricity prompt or buzzer are dynamic
Make；
Control circuit: connecting with signal processor, and for controlling detector temperature, holding detector is temperature constant state；
Memory: connecting with signal processor, saves system factory-default, including pyroelectric infrared sensor temperature is rectified
Positive value, bad point calibration and system running log.
Compared with the mode of conventional detection environment temperature, this programme causes the temperature of object of fire itself by directly measurement
Degree, sets about monitoring from the root of fire, alarms more advanced, can real time reaction body surface temperature, rather than environment temperature,
Be not easily susceptible to the interference of external environment, the temperature accuracy of measurement is high, can real-time tracking object temperature change curve, do not have to wait until object
Volumetric combustion, which is got up, just takes alarm action, and action is greatly speeded up, and extinguishing effect is more preferable.
According to black body radiation principle, all temperature are higher than the object of absolute zero all ceaselessly red to surrounding space sending
External radiation energy.The size of the infrared energy of object and its have very closely by the distribution of wavelength with its surface temperature
Relationship.Therefore, by the measurement of the infrared energy radiated to object itself, its surface temperature just can accurately be measured.Heat
Electric infrared sensor is released using the principle, is widely used electronic anti-theft, in human body detection field, this sensor will not
Lead to privacy and business secrecy leakage.Pyroelectric infrared sensor is due to technique and materials variances, and each pixel is to infrared induction
The radiation of same intensity can also be led all it is possible that difference, very inconvenient in use if this difference is not corrected
Cause the body surface temperature inaccuracy of measurement.Therefore this alarm is in system before use, carrying out to pyroelectric infrared sensor
Both full-pixel correction realizes the heterogeneity signal processing linear signal of all the points all pixels are all treated as standard
Then infrared radiation signal carries out body surface temperature measurement again, it is accurate that measurement facilitates.
Preferably, further include Power Management Unit: being connect simultaneously with signal processor and detector, manage power supply electricity consumption
Amount.
Preferably, signal processor is after the value for reading PTAT register in pyroelectric infrared sensor, according to memory
The material emissivity parameter of middle storage compensates pyroelectric infrared sensor, calculates the surface temperature of measured object, according to
Following formula:To is target temperature
Value；Vir is detector data correction value；Ta is ambient temperature value；I, j are that the thermoelectric pile on pyroelectric infrared sensor is corresponding
Transverse and longitudinal coordinate value；VIr (i, j) COMPENSATEDFor detector VIr (i, j)Compensated value.
And there is difference to the radiation of the same intensity of infrared induction and can be compensated automatically by emissivity come real in each pixel
It is existing.Different objects emissivity is all different, and emissivity can compensate, for example you are with 1 micron of infrared radiation thermometer, goes to measure stainless
Steel, emissivity needs to be set as 0.3 or so, and measures carbon, needs to be arranged to 0.95 or so.According to the object of different detecting objects
Rationality matter goes that different emissivity are arranged, with the deviation of compensation temperature.So having this parameter of emissivity, compensation can also be called
Coefficient.It also cannot achieve automatic compensation at present, be the process of a set of complexity, there has been no one because of the emissivity value of judgment object
Kind infrared radiation thermometer itself can have the function of " emissivity compensates automatically ".Therefore this programme is before equipment factory in memory
In have the emissivity parameter for prestoring most of material, be manually set in use site.After compensating in this way, measuring apparatus
Temperature is closest to object self-temperature, and the precision of fire detection temperature is increased to 0.1 DEG C, and thermal change trend can track, accidentally
Report rate is less than 0.1%.
Preferably, pyroelectric infrared sensor includes the digital active thermopile array combination of multiple pixels, each active
Thermoelectric pile connects low-noise amplifier, ADC analog-digital converter, memory ram and I2C interface, I2C interface with this and is also connected with
EEPROM, I2C interface are stored in memory ram after the conversion of ADC analog-digital converter for reading active thermopile array combination
Measurement result, EEPROM for storage temperature calculate and calibrate parameter.
One kind being based on array temperature test type fire alarm detection method, includes the following steps:
Step A) system of fire alarm is initialized；
Step B) detector is initialized:
Step C) it is corrected using heterogeneity signal of the signal processor to all pixels point on detector, bad point correction,
So that all pixels on detector are standard IR radiation signal；
Step D) signal processor according to the different objects pyroelectric infrared sensor temperature correction value stored in memory,
Ambient temperature compensation and atmospheric attenuation compensation are carried out to detector；
Step E) detector carries out object temperature detection and passing to signal processor, when the object table that detector detects
Face temperature is greater than 45 °, then starts warning circuit early warning and photoelectricity prompt, if body surface temperature is greater than 60 °, starts alarm electricity
Road alarm, buzzer movement, status data upload memory；
Step F) system reset is then carried out after body surface temperature detection, eliminate alarm.
Compared with prior art, the present invention having the following advantages and benefits:
1, for the present invention compared with the mode of conventional detection environment temperature, this programme causes the object of fire by directly measurement
The temperature of itself sets about monitoring from the root of fire, alarm it is more advanced, can real time reaction body surface temperature, rather than
Environment temperature, is not easily susceptible to the interference of external environment, and the temperature accuracy of measurement is high, can real-time tracking object temperature change curve,
Without just taking alarm action until object blazes up, action is greatly speeded up, and extinguishing effect is more preferable.
2, after the present invention carries out emissivity-compensated to pyroelectric infrared sensor, the temperature of measuring apparatus is closest to object sheet
Body temperature, the precision of fire detection temperature are increased to 0.1 DEG C, and thermal change trend can track, and rate of false alarm is less than 0.1%.
3, infrared thermal imaging technique is transformed into fire detector technology by this programme, and complete machine structure is small, and coverage area is wide, at
This is low.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is flow chart of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1:
As shown in Figure 1, the present invention includes a kind of based on array temperature test type fire alarm, including
Signal processor: right according to the pyroelectric infrared sensor temperature correction value of the different objects stored in memory
Detector carries out both full-pixel correction, the linear signal of heterogeneity signal processing of all pixels point on detector, so that visiting
Surveying all pixels on device is the progress real-time surface temperature detection of object after standard IR radiation signal, by ethernet communication side
The far red light analog electrical signal that detector transmits after formula reading correction, after being converted into digital signal by ADC, with storage
Preset temperature value in device is compared, and starts warning circuit early warning and photoelectricity prompt if body surface temperature is greater than 45 °, if
Body surface temperature is greater than 60 °, then starts warning circuit alarm, buzzer movement, status data upload server；
Detector: built-in pyroelectric infrared sensor is converted to for detection object to the far red light signal of external radiation
Electric signal is transferred to signal processor, real-time detection body surface temperature by transfer bus；
Signal conditioning unit: connecting with signal processor, more than communication digital signal modulated to 24v level, utilizes biography
Defeated bus is transmitted at a distance；
Warning circuit: receiving signal processor and send instruction, realizes that circuit early warning, alarm, photoelectricity prompt or buzzer are dynamic
Make；
Control circuit: connecting with signal processor, and for controlling detector temperature, holding detector is temperature constant state；
Memory: connecting with signal processor, saves system factory-default, including pyroelectric infrared sensor temperature is rectified
Positive value, bad point calibration and system running log.
It is understood that the key of fire extinguishing is to find fire source place, and the generation of fire source is since the raising of object self-temperature reaches
Burning point has been arrived, fire behavior then occurs, and since the burning of object can indirectly lead to the raising of environment temperature, existing temperature sensitive type
Fire-alarm is the situation of change by measuring environment temperature, then carries out fire alarm, is equivalent to indirect measurement, at this time
It is equivalent to fire to have occurred and that, and situation of change is very fast after fire generation, it is clear that increase fire extinguishing in this case
Difficulty is unfavorable for putting out in time for fire.Due to any object more than absolute zero all can outside infrared radiation, it is modern
Physics is referred to as heat ray, the surface real time temperature of the object can be reflected, after the present invention is using both full-pixel correction is carried out
Pyroelectric infrared sensor accurately measure based on covering space in body surface temperature, then by signal processor analysis
Body surface temperature changing trend starts warning circuit early warning and photoelectricity prompt, if object if body surface temperature is greater than 45 °
Surface temperature is greater than 60 °, then starts warning circuit alarm, buzzer movement, and status data uploads memory.
Compared with the mode of conventional detection environment temperature, this programme causes the temperature of object of fire itself by directly measurement
Degree, sets about monitoring from the root of fire, alarms more advanced, can real time reaction body surface temperature, rather than environment temperature,
Be not easily susceptible to the interference of external environment, the temperature accuracy of measurement is high, can real-time tracking object temperature change curve, do not have to wait until object
Volumetric combustion, which is got up, just takes alarm action, and action is greatly speeded up, and extinguishing effect is more preferable.
According to black body radiation principle, all temperature are higher than the object of absolute zero all ceaselessly red to surrounding space sending
External radiation energy.The size of the infrared energy of object and its have very closely by the distribution of wavelength with its surface temperature
Relationship.Therefore, by the measurement of the infrared energy radiated to object itself, its surface temperature just can accurately be measured.Heat
Electric infrared sensor is released using the principle, is widely used electronic anti-theft, in human body detection field, this sensor will not
Lead to privacy and business secrecy leakage.Pyroelectric infrared sensor is due to technique and materials variances, and each pixel is to infrared induction
The radiation of same intensity can also be led all it is possible that difference, very inconvenient in use if this difference is not corrected
Cause the body surface temperature inaccuracy of measurement.Therefore this alarm is in system before use, carrying out to pyroelectric infrared sensor
Both full-pixel correction realizes the heterogeneity signal processing linear signal of all the points all pixels are all treated as standard
Then infrared radiation signal carries out body surface temperature measurement again, it is accurate that measurement facilitates.
Infrared thermal imaging technique is transformed into fire detector technology by this programme, and complete machine structure is small, and coverage area is wide, cost
It is low.This programme can be combined with smog labyrinth, form new compound alarm, be provided simultaneously with sense cigarette and temp sensing function.
Embodiment 2:
The present embodiment is preferably as follows on the basis of embodiment 1: further including Power Management Unit: with signal processor and spy
It surveys device to connect simultaneously, manages power supply electricity consumption.It is at low power consumpting state, reduces energy consumption.
Signal processor is after the value for reading PTAT register in pyroelectric infrared sensor, according to what is stored in memory
Material emissivity parameter compensates pyroelectric infrared sensor, calculates the surface temperature of measured object, according to the following formula:To is target temperature value；Vir is
Detector data correction value；Ta is ambient temperature value；I, j are the corresponding transverse and longitudinal coordinate of thermoelectric pile on pyroelectric infrared sensor
Value；VIr (i, j) COMPENSATEDFor detector VIr (i, j)Compensated value.After Vir detector data correction value passes through emissivity-compensated
Obtain VIr (i, j) COMPENSATEDCompensated value.
And there is difference to the radiation of the same intensity of infrared induction and can be compensated automatically by emissivity come real in each pixel
It is existing.Different objects emissivity is all different, and emissivity can compensate, for example you are with 1 micron of infrared radiation thermometer, goes to measure stainless
Steel, emissivity needs to be set as 0.3 or so, and measures carbon, needs to be arranged to 0.95 or so.According to the object of different detecting objects
Rationality matter goes that different emissivity are arranged, with the deviation of compensation temperature.So having this parameter of emissivity, compensation can also be called
Coefficient.It also cannot achieve automatic compensation at present, be the process of a set of complexity, there has been no one because of the emissivity value of judgment object
Kind infrared radiation thermometer itself can have the function of " emissivity compensates automatically ".Therefore this programme is before equipment factory in memory
In have the emissivity parameter for prestoring most of material, be manually set in use site.After compensating in this way, measuring apparatus
Temperature is closest to object self-temperature, and the precision of fire detection temperature is increased to 0.1 DEG C, and thermal change trend can track, accidentally
Report rate is less than 0.1%.
Pyroelectric infrared sensor includes the digital active thermopile array combination of multiple pixels, and each active thermoelectric pile is equal
Low-noise amplifier, ADC analog-digital converter, memory ram and I2C interface are connected with this, I2C interface is also connected with EEPROM, and I2C connects
The measurement result that mouth is stored in memory ram for reading active thermopile array combination after the conversion of ADC analog-digital converter,
The parameter that EEPROM is calculated and calibrated for storage temperature.The combination of digital active thermopile array can be to be visited by 64 sensors
Unit (thermoelectric pile) composition is surveyed, the infrared band energy that each probe unit detection receives simultaneously is translated into electric signal, passes through
It is converted into digital information after crossing ADC conversion, the RAM in sensor is then written by digital filtering.User can by the interface I2C
To access RAM and read measurement result for temperature computation.This programme selects the rpyroelectric infrared sensing of 30 ° × 30 ° field angles
Device, if right angle setting height is 5 meters, single sensor detection range can cover 3.14 × 2.88m × 2.88m
Area.Complete room area covering may be implemented using the splicing of multiple sensors.
Embodiment 3:
One kind being based on array temperature test type fire alarm detection method, includes the following steps:
Step A) system of fire alarm is initialized；
Step B) detector is initialized:
Step C) it is corrected using heterogeneity signal of the signal processor to all pixels point on detector, bad point correction,
So that all pixels on detector are standard IR radiation signal；
Step D) signal processor according to the different objects pyroelectric infrared sensor temperature correction value stored in memory,
Ambient temperature compensation and atmospheric attenuation compensation are carried out to detector；
Step E) detector carries out object temperature detection and passing to signal processor, when the object table that detector detects
Face temperature is greater than 45 °, then starts warning circuit early warning and photoelectricity prompt, if body surface temperature is greater than 60 °, starts alarm electricity
Road alarm, buzzer movement, status data upload memory；
Step F) system reset is then carried out after body surface temperature detection, eliminate alarm.
The data acquisition flow realized by this method are as follows: connect the external microcontroller i.e. signal of pyroelectric infrared sensor
Processor reads the RAM data of different address, and with reference to the calibration figure of EEPROM, to compensate different rpyroelectric infrared sensings
Difference between device, to establish thermal image, to calculate every in image temperature.Simultaneously in view of pyroelectric infrared sensor speed
Degree is fast, and data volume is big, and whens multiple sensor joining image-formings needs good management, therefore, needs reliable data logical in
Letter mode can guarantee communication quality using ethernet communication.Within the system, we are using C8051 as main control singlechip
To receive and process corresponding data, while the upload of responsible final calculation result, while realizing that system supplies using lithium battery
Electricity and communication process.
When calculating pyroelectric infrared sensor own temperature, PTAT register is read from pyroelectric infrared sensor,
Sensor temperature is obtained with parameter operation after being worth.Parameter operation values are for compensating and calibrating each sensing in calculating process
The difference of pixel unit.This part calculates and is utilized several formula, parameter therein be by the value secondary calculating in EEPROM and
Come.In addition, object is unlikely to be one " black matrix ", i.e., its emissivity is always less than 1 according to heat radiation theory.It is different simultaneously
Material has different emissivity, needs to consider the material emissivity on testee surface in the application, and be compensated.Finally
According to formulaCalculate measured object
Surface temperature.
This programme causes the temperature of object of fire itself by directly measurement, sets about monitoring from the root of fire, reports
Police is more advanced, can real time reaction body surface temperature, rather than environment temperature is not easily susceptible to the interference of external environment, measures
Temperature accuracy it is high, can real-time tracking object temperature change curve go out without just taking action until object blazes up
Fire action is greatly speeded up, and extinguishing effect is more preferable.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (4)
1. one kind is based on array temperature test type fire alarm characterized by comprising
Signal processor: according to the pyroelectric infrared sensor temperature correction value of the different objects stored in memory, to detection
Device carries out both full-pixel correction, the linear signal of heterogeneity signal processing of all pixels point on detector, so that detector
On all pixels be standard IR radiation signal after carry out the real-time surface temperature detection of object, read by ethernet communication mode
The far red light analog electrical signal that detector transmits after correcting is taken, after being converted into digital signal by ADC, in memory
Preset temperature value be compared, if body surface temperature be greater than 45 ° if start warning circuit early warning and photoelectricity prompt, if object
Surface temperature is greater than 60 °, then starts warning circuit alarm, buzzer movement, status data upload server；
Detector: built-in pyroelectric infrared sensor is converted to telecommunications for detection object to the far red light signal of external radiation
Number, signal processor, real-time detection body surface temperature are transferred to by transfer bus；
Signal conditioning unit: connecting with signal processor, total using transmission more than communication digital signal modulated to 24v level
Line is transmitted at a distance；
Warning circuit: receiving signal processor and send instruction, realizes circuit early warning, alarm, photoelectricity prompt or buzzer movement；
Control circuit: connecting with signal processor, and for controlling detector temperature, holding detector is temperature constant state；
Memory: connecting with signal processor, saves system factory-default, including pyroelectric infrared sensor temperature correction
Value, bad point calibration and system running log；
Signal processor is after the value for reading PTAT register in pyroelectric infrared sensor, according to the material stored in memory
Emissivity parameter compensates pyroelectric infrared sensor, calculates the surface temperature of measured object, according to the following formula:
ToFor target temperature value；VirFor detector data correction value；TaFor ambient temperature value；I, j are on pyroelectric infrared sensor
The corresponding transverse and longitudinal coordinate value of thermoelectric pile；VIr (i, j) COMPENSATEDFor detector VIr (i, j)Compensated value.
2. according to claim 1 a kind of based on array temperature test type fire alarm, which is characterized in that further include
Power Management Unit: connecting simultaneously with signal processor and detector, manages power supply electricity consumption.
3. according to claim 1 a kind of based on array temperature test type fire alarm, which is characterized in that pyroelectricity
Infrared sensor includes the digital active thermopile array combination of multiple pixels, and each active thermoelectric pile connects low noise with this
Amplifier, ADC analog-digital converter, memory ram and I2C interface, I2C interface are also connected with EEPROM, and I2C interface is active for reading
Thermopile array combination is stored in the measurement result in memory ram after the conversion of ADC analog-digital converter, and EEPROM is for storing temperature
Degree calculates and the parameter of calibration.
4. one kind is based on array temperature test type fire alarm detection method, using such as claim 1-3 any one institute
The fire alarm stated, which comprises the steps of:
Step A) system of fire alarm is initialized；
Step B) detector is initialized:
Step C) it is corrected using heterogeneity signal of the signal processor to all pixels point on detector, bad point correction, so that
All pixels on detector are standard IR radiation signal；
Step D) signal processor is according to the different objects pyroelectric infrared sensor temperature correction value stored in memory, to spy
It surveys device and carries out ambient temperature compensation and atmospheric attenuation compensation；
Step E) detector carries out object temperature detection and passing to signal processor, when the body surface temperature that detector detects
Degree is greater than 45 °, then starts warning circuit early warning and photoelectricity prompt starts warning circuit report if body surface temperature is greater than 60 °
Alert, buzzer movement, status data uploads memory；
Step F) system reset is then carried out after body surface temperature detection, eliminate alarm.
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| CN108399708A (en) * | 2018-05-17 | 2018-08-14 | 中恒智能工业设备（深圳）有限公司 | A kind of infrared thermal imagery alarm and alarm implementation method |
| EP3745104A1 (en) * | 2019-05-30 | 2020-12-02 | Melexis Technologies NV | Temperature measurement apparatus and method of measuring temperature |
| CN113639878A (en) * | 2021-07-02 | 2021-11-12 | 富盛科技股份有限公司 | Temperature sensor and fire alarm device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201497577U (en) * | 2009-08-13 | 2010-06-02 | 泉州市科立信安防电子有限公司 | Passive infrared detector |
| CN201689513U (en) * | 2009-12-28 | 2010-12-29 | 南京南消电子技术有限公司 | Image type fire detector |
| CN201707752U (en) * | 2010-05-24 | 2011-01-12 | 上海市东方海事工程技术有限公司 | Fire alarm device of air preheater |
| CN104215335A (en) * | 2014-09-29 | 2014-12-17 | 中国计量学院 | Wireless infrared temperature measuring device |
| CN104316201A (en) * | 2014-11-17 | 2015-01-28 | 重庆瑞升康博电气有限公司 | Infrared array temperature measurement monitoring system of high-voltage isolating switch contact |
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- 2017-09-22 CN CN201710864601.0A patent/CN107590942B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201497577U (en) * | 2009-08-13 | 2010-06-02 | 泉州市科立信安防电子有限公司 | Passive infrared detector |
| CN201689513U (en) * | 2009-12-28 | 2010-12-29 | 南京南消电子技术有限公司 | Image type fire detector |
| CN201707752U (en) * | 2010-05-24 | 2011-01-12 | 上海市东方海事工程技术有限公司 | Fire alarm device of air preheater |
| CN104215335A (en) * | 2014-09-29 | 2014-12-17 | 中国计量学院 | Wireless infrared temperature measuring device |
| CN104316201A (en) * | 2014-11-17 | 2015-01-28 | 重庆瑞升康博电气有限公司 | Infrared array temperature measurement monitoring system of high-voltage isolating switch contact |
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