CN111765979A - Infrared thermal imaging measurement data analysis combined compensation temperature calibration method - Google Patents
Infrared thermal imaging measurement data analysis combined compensation temperature calibration method Download PDFInfo
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- 238000001931 thermography Methods 0.000 title claims abstract description 61
- 238000005259 measurement Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007405 data analysis Methods 0.000 title claims abstract description 13
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000004891 communication Methods 0.000 claims abstract description 14
- 238000003331 infrared imaging Methods 0.000 claims abstract description 7
- 230000036760 body temperature Effects 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 6
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
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- 208000015181 infectious disease Diseases 0.000 description 2
- 230000002458 infectious effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
- G01J5/14—Electrical features thereof
- G01J5/16—Arrangements with respect to the cold junction; Compensating influence of ambient temperature or other variables
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
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Abstract
The invention discloses a method for calibrating infrared thermal imaging measurement data analysis and compensation temperature, wherein sensing data of the body temperature of an infrared thermal imaging camera is sent to a thermal infrared imaging temperature measurement system in real time through a wireless data interface or a USB data interface to serve as compensation precision drift reference data, a RTD temperature detection module controls a heating and cooling power supply circuit to work, the infrared thermal imaging camera is assisted to quickly reach an ideal working temperature, the infrared thermal imaging camera with an excessively high working temperature is promoted to be cooled, the automatic cooling function of infrared thermal imaging system equipment is realized through a conductor heating and cooling power supply circuit, a better working environment is provided for the thermal infrared imaging temperature measurement system in an active cooling mode to obtain temperature stability, and high-precision measurement is realized to reach +/-0.3 ℃ and +/-0.3 ℃; and the real-time communication and temperature data reading with the infrared thermal imaging human body temperature measurement system are realized by combining a wireless data interface and a USB data interface, so that the system is automatically calibrated.
Description
Technical Field
The invention belongs to a body temperature measuring method, and particularly relates to a method for calibrating temperature precision based on access of measurement data and combination of a heating and cooling function.
Background
In the field of health and epidemic prevention, because more serious disease patients caused by viruses like Ebola virus (Ebola), 2019 novel coronavirus (2019-nCoV), Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS) have fever and fever, and the patients have high infectious risk at the moment, the infrared thermal imaging body temperature monitoring system is used for detecting the body temperature in dense crowds, so that a potential infectious person method can be found, pre-warned and selected, and the method is an effective epidemic situation control mode.
However, the conventional infrared thermal imaging device has poor temperature accuracy, and needs calibration during use to achieve accurate temperature measurement, and generally uses self-cooling and self-calibration of a timing switch inside the infrared thermal imaging camera to perform temperature compensation, and if higher temperature accuracy is needed, a black body is needed to be used for calibration or an external temperature compensation mode is used to improve measurement accuracy.
The infrared thermal imaging temperature detection system has the advantages that under different environments, the measurement precision has obvious deviation, the measurement result is influenced, the temperature of the infrared thermal imaging temperature detection system is within the range of 30-42 ℃ of the core temperature of a human body, the measurement result with the temperature deviation reaching 1-2 ℃ can possibly cause misjudgment, and the precision and the stability within the temperature range of the human body temperature measurement are not ideal enough.
With different application environment conditions, the temperature of the infrared thermal imaging temperature detection system equipment can rise due to power consumption, the higher temperature can seriously affect the measurement result of the system, and the measurement data has larger deviation with the actual temperature along with the drift of the equipment temperature.
In summary, the prior art mainly has 2 major disadvantages:
1. the conventional infrared thermal imaging human body temperature measurement system equipment does not have accurate temperature monitoring capability, the system operation depends on the thermal stability and cost of the equipment, and the temperature measurement performance deviation is larger in a low-cost system;
2. the conventional infrared thermal imaging human body temperature measurement system generally does not have the functions of detecting the ambient temperature and the humidity, and also does not have the functions of wireless or wired connection or data communication connection of external ambient temperature and humidity detection components, so that the automatic temperature calibration of the infrared thermal imaging human body temperature measurement system is difficult to realize.
Disclosure of Invention
The invention aims to provide a method for calibrating the temperature by combining the analysis and compensation of infrared thermal imaging measurement data, which has the advantages of high precision, good stability, quick start and real-time communication.
In order to solve the technical problems, the invention adopts the technical scheme that: a temperature calibration method combining infrared thermal imaging measurement data analysis and compensation integrates an RTD temperature detection module, a wireless data interface and a USB data interface, and is tightly combined to an infrared thermal imaging camera body, and sensing data of the temperature of the infrared thermal imaging camera body is sent to a thermal infrared imaging temperature measurement system in real time through the wireless data interface or the USB data interface to serve as compensation precision drift reference data; the infrared thermal imaging camera is closely combined with a heating and cooling power supply circuit, the RTD temperature detection module controls the heating and cooling power supply circuit to work, the infrared thermal imaging camera is assisted to quickly reach an ideal working temperature, and in addition, the infrared thermal imaging camera with the overhigh working temperature is promoted to cool.
Further, the wireless data interface comprises a Bluetooth wireless data interface and a Wifi wireless data interface.
Furthermore, the heating and cooling power supply circuit adopts a heating and cooling power supply circuit containing a semiconductor, a carbon nano tube or graphene.
Further, an environment humidity detection module is integrated.
Furthermore, the RTD temperature detection module, the wireless data interface and the USB data interface are connected to a power supply circuit of the infrared thermal imaging camera.
Further, a 5G communication chip is integrated.
By implementing the technical scheme of the invention, the automatic cooling function of the infrared thermal imaging system equipment is realized through the conductor heating and cooling power supply circuit, a better working environment is provided for the thermal infrared imaging temperature measurement system in an active cooling mode to obtain temperature stability, various infrared thermal imaging human body temperature measurement systems are matched, and the measurement precision of high precision +/-0.3 ℃ and high stability +/-0.3 ℃ is achieved; the RTD temperature detection module, the wireless data interface and the USB data interface are combined to realize real-time communication and temperature data reading with the infrared thermal imaging human body temperature measurement system for automatic system calibration, the wireless data communication interface enables the infrared thermal imaging temperature measurement system to acquire temperature and humidity data of the environment in a method manner, the environment temperature and humidity detection function of the infrared thermal imaging system can be realized, and the acquired temperature and humidity data of the environment are used as reference compensation temperature to integrate the precision curve of the original infrared thermal imaging camera to bring higher precision to the camera; the wireless data interface and the USB data interface realize real-time communication with different infrared thermal imaging humidity measuring systems, are suitable for different infrared thermal imaging cameras, share a power supply with an original camera power circuit without influencing application, and the design of small volume and low power consumption enables the functional unit to be matched with the original camera power circuit without changing, so that the multifunctional infrared thermal imaging humidity measuring system has excellent convenience and realizes simple combination and rapid arrangement.
The invention is widely applied to the fields of safety protection monitoring, emergency search and rescue and industrial automation, and also has the following characteristics:
1. the infrared thermal imaging human body temperature measurement system with low and medium cost is improved, high-benefit application is realized, and the infrared thermal imaging human body temperature measurement system is suitable for large-scale popularization and application and reduces public epidemic prevention expenses;
2. under the action of the heating function of the conductor heating and cooling power supply circuit, the starting can quickly enter a normal working state;
3. the data transmission mode that utilizes the bluetooth to be wireless possesses ultralow consumption and connection convenience, can realize with the real-time communication of infrared thermal imaging human temperature measurement system.
Drawings
FIG. 1 is a block diagram of an infrared thermography measurement data analysis in conjunction with a compensated temperature calibration method.
Fig. 2 is a human body infrared temperature measurement system with measurement data analysis combined with compensation temperature calibration function.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the method for analyzing the measurement data of infrared thermal imaging and compensating the temperature calibration adopts an integrated assembly of RTD high-precision temperature detection, environmental humidity detection and bluetooth wireless and USB data interfaces, which takes a high-precision platinum IEC standard class a RTD (resistance temperature detector) with a resolution of 0.01 ℃ as a core, and can be tightly combined to the infrared thermal imaging camera housing of a low-cost thermal infrared imaging temperature detection system.
Sensor data such as the temperature of the infrared thermal imaging camera body, the ambient humidity and the like can be sent to the thermal infrared imaging temperature measuring system in real time through a wireless Bluetooth or USB data interface, software is used as reference data of the system to compensate precision change caused by temperature drift of the infrared thermal imaging camera, and a reasonable curve compensation mode is selected to obtain the accuracy of final temperature measurement data.
The heating and cooling power supply circuit separated from the temperature measuring circuit by a certain distance is also tightly combined on the infrared thermal imaging camera shell, and can assist in increasing or reducing the temperature of the infrared thermal imaging camera, namely, when the camera is at a lower temperature and does not reach the temperature condition of ideal precision, a heating function is provided, so that the camera can be quickly heated to reach a better working state; when the camera has overhigh temperature to influence the testing precision, the cooling function can lead the camera to return to a better working state and maintain stability through the cooling of the shell; the heating and refrigerating functions are controlled by the RTD temperature detection module and can be written in target control temperature parameters through the data interface.
The whole functional unit is small in size, so that the functional unit can be simply adsorbed or attached to the surface of the shell of the infrared thermal imaging camera, extremely low power consumption is achieved, and meanwhile, the functional unit can share a power supply with an original camera power circuit without influencing application.
As shown in fig. 2, the infrared thermal imaging measurement data analysis and compensation temperature calibration method is applied to a human body infrared temperature measurement system, and the human body infrared temperature measurement system is composed of a superconducting heat pipe black body target plate, a black body target plate heater, an RTD temperature measurement element, a heating and cooling power supply circuit, an RTD temperature measurement control circuit, an environmental parameter sensor module, a black body target plate semiconductor refrigerator and a data interface module.
The superconducting heat pipe black body target plate contacts the black body target plate heater and the black body target plate semiconductor refrigerator, the black body target plate heater and the black body target plate semiconductor refrigerator are powered by a heating and cooling power supply circuit, the heating and cooling power supply circuit is electrically connected with an RTD temperature measurement control circuit, the RTD temperature measurement control circuit is electrically connected with an environmental parameter sensor module, a Bluetooth wireless data interface module, a WiFi wireless data interface module and an RS232 serial data interface module, and the black body target plate heater is electrically connected with an RTD temperature measurement element.
The precision of the infrared thermal imaging temperature measurement system is compared with the precision drift of different environmental temperature and humidity data, and the precision drift can be precisely measured and collated into a basic precision database in a laboratory environment and stored in system software, namely corresponding different measured temperature deviation curves under different shell temperature and humidity curves; all data points on the curve can be mathematically compensated to near zero error; when the environmental temperature and humidity data in the whole functional unit are collected to the infrared thermal imaging temperature measurement system, the system software can reasonably and reasonably select, switch and mathematically operate corresponding to a basic precision database stored in the previous software according to the parameters collected in real time, and other compensation factors are additionally added, so that the high-precision infrared thermal imaging temperature measurement data can be finally output on the system-level software. The final system performance is obviously improved compared with the system without the functional unit.
The Bluetooth and Wifi wireless communication interfaces adopted by the functional unit can adopt technical modes such as Zigbee (based on IEE802.15.4 standard), RF (wireless RFID, radio frequency non-contact automatic identification technology) EnOcean (international standard ISO/IEC14543-3-10), NB-IoT (cellular-based narrowband Internet of things) and the like to obtain similar effects.
The RS232 wired communication interface adopted by the function of the invention can adopt RS485 (a balanced digital multipoint system communication protocol standard defined by the telecommunication industry association and the electronic industry alliance) or Modbus (an industrial communication standard) and the like to realize similar functions, and in some simplified application occasions, the function of the limited communication interface can be removed.
The function unit of the invention can remove the semiconductor heating and cooling function and the related circuit in the simplified application; or other single heating devices can be adopted for replacement, such as a carbon nano tube heating device and a graphene heating device for replacement to realize similar functions.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (6)
1. A method for calibrating temperature by combining infrared thermal imaging measurement data analysis and compensation is characterized by comprising the following steps:
the RTD temperature detection module, the wireless data interface and the USB data interface are integrated and tightly combined to the infrared thermal imaging camera body, and sensing data of the infrared thermal imaging camera body temperature are sent to the thermal infrared imaging temperature measurement system in real time through the wireless data interface or the USB data interface to serve as compensation precision drift reference data;
the infrared thermal imaging camera is closely combined with a heating and cooling power supply circuit, the RTD temperature detection module controls the heating and cooling power supply circuit to work, the infrared thermal imaging camera is assisted to quickly reach an ideal working temperature, and in addition, the infrared thermal imaging camera with the overhigh working temperature is promoted to cool.
2. The infrared thermal imaging measurement data analysis in combination with compensated temperature calibration method of claim 1, wherein: the wireless data interface comprises a Bluetooth wireless data interface and a Wifi wireless data interface.
3. The infrared thermal imaging measurement data analysis in combination with compensated temperature calibration method of claim 1, wherein: the heating and cooling power supply circuit adopts a heating and cooling power supply circuit containing a semiconductor, a carbon nano tube or graphene.
4. The infrared thermal imaging measurement data analysis in combination with compensated temperature calibration method of claim 1, wherein: an ambient humidity detection module is also integrated.
5. The infrared thermal imaging measurement data analysis in combination with compensated temperature calibration method of claim 1, wherein: and the RTD temperature detection module, the wireless data interface and the USB data interface are connected to a power supply circuit of the infrared thermal imaging camera.
6. The infrared thermal imaging measurement data analysis in combination with compensated temperature calibration method of claim 1, wherein: and a 5G communication chip is integrated.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008404A (en) * | 2021-02-22 | 2021-06-22 | 深圳市商汤科技有限公司 | Temperature measuring method and device, electronic device and storage medium |
| CN113345194A (en) * | 2021-04-29 | 2021-09-03 | 浙江大华技术股份有限公司 | Forest fire early warning method, system, electronic device and storage medium |
| WO2022104816A1 (en) * | 2020-11-23 | 2022-05-27 | 江苏镭博智能科技有限公司 | Temperature compensation method and system for thermal camera |
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Application publication date: 20201013 |