CN111693148A - Outdoor infrared human body temperature measurement method and system - Google Patents
Outdoor infrared human body temperature measurement method and system Download PDFInfo
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- CN111693148A CN111693148A CN202010574652.1A CN202010574652A CN111693148A CN 111693148 A CN111693148 A CN 111693148A CN 202010574652 A CN202010574652 A CN 202010574652A CN 111693148 A CN111693148 A CN 111693148A
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000036760 body temperature Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 210000001061 forehead Anatomy 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
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- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
- G01J5/0025—Living bodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/80—Calibration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
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Abstract
The invention discloses an outdoor infrared human body temperature measurement method and system, wherein the method comprises the following steps: step 1, an environment temperature sensor collects body surface temperature data of a human body; step 2, the outdoor temperature measuring terminal or the environment temperature sensor transmits the body surface temperature data and the ID value of the equipment to the background server; and 3, converting the body surface temperature data by the outdoor temperature measuring terminal or the background server through a temperature conversion algorithm to obtain the real human body temperature. The invention has the beneficial effects that: the defect that the existing infrared thermometer cannot adapt to outdoor environment and outdoor temperature is overcome, and the problem that outdoor temperature measurement is inaccurate or the cost of a building system is too high is solved.
Description
Technical Field
The invention belongs to an infrared temperature measurement technology, and particularly relates to an outdoor infrared human body temperature measurement method and system.
Background
Compared with a traditional mercury thermometer and an ear thermometer, the non-contact infrared temperature measurement has the advantages that the temperature measurement efficiency is high, cross infection is avoided, and data synchronization is achieved. However, in recent years, the requirements for infrared temperature measurement in outdoor environments such as schools, communities and factories are met along with various epidemic needs, the outdoor environment is in different cities, different altitudes and even different time of the same position are greatly changed, the change of the room temperature can directly cause the change of the forehead surface temperature, for example, under the environment of 5 ℃, the forehead temperature can only be less than 30 ℃, and under the hot outdoor environment of 35 ℃, the forehead temperature can reach about 36 ℃, so the forehead surface temperature cannot be directly used as the judgment standard of body temperature heating, and meanwhile, the real human body temperature mainly changes due to the change of the environmental temperature and the change of the corresponding normal body surface temperature under a certain environmental temperature.
Many existing infrared temperature measurement devices are used by directly adopting body surface temperature, some devices can also perform temperature compensation, but during temperature compensation, accurate environment temperature needs to be acquired, and an infrared temperature measurement sensor needs to acquire a temperature value by acquiring the temperature of a certain characteristic object (non-air). Therefore, many manufacturers can utilize the infrared temperature measurement sensor to acquire the ambient temperature, namely, the temperature acquired when no person is in front of the infrared lens is taken as the ambient temperature. Therefore, algorithm conversion is carried out between the infrared thermometric lens and the body surface temperature, and due to the fact that other objects in the environment, including walls, trees and other buildings, are close to thermal balance with the environment, the temperature of the objects can be approximately equal to the environment temperature, but the biggest problem of the method is that the infrared thermometric lens does not know when no person is in front of the lens and how far away from the lens when a person is in front of the lens, so that a distance sensor or even a face detection function is needed to be added for assistance, but great uncertainty exists, for example, when a person stands at a place outside an effective face detection distance, the sensor lens just faces the body of the person, the temperature collected by the sensor can be higher than the real environment temperature, and the temperature of the human body output by the algorithm is lower than the actual temperature of the human body. Similarly, if the ambient temperature itself is high, but the sensor lens has just picked up the temperature of a cold object, the ambient temperature is much lower than the actual ambient temperature. Thereby causing the body surface conversion temperature to be higher and causing abnormal temperature alarm. In addition, in some occasions, for example, objects in an effective environment cannot be acquired within the angle of a lens of a sensor, and the environment temperature cannot be acquired, so that the algorithm cannot be calculated, and an effective body temperature value cannot be given.
Some manufacturers have considered to add an ambient temperature sensor module to the current human face temperature measurement terminal, that is, ambient temperature and human body surface temperature are integrated on one device, so that the advantage of obtaining ambient temperature without relying on an infrared temperature measurement module is achieved, but during actual use, due to the fact that the installation position of the device cannot be guaranteed to be in a real environment temperature scene, some abnormal conditions can be caused, for example, when the device is installed at the door of an office building, obstacles or other objects can be shielded around the device, and the environment temperature is 30 ℃. At this time, the value obtained by the environment temperature sensor on the equipment is only the temperature value of the environment where the current equipment is located, and the real outdoor environment temperature may be 34 ℃, so that when a person measures the temperature before walking to the equipment from the outside, the forehead surface temperature may be higher than the body surface temperature at 30 ℃, and the body surface temperature after temperature conversion may be different from the real body temperature.
The existing infrared temperature measurement equipment does not consider the situation that the outdoor temperature is higher or lower, only restricts equipment to be used at normal room temperature, and when the actual room temperature is too low or too high, various abnormal alarms can be met, and the existing infrared temperature measurement equipment can not be effectively solved simply by a temperature compensation mode:
1. the implementation cost is high: when the outdoor protection device is used outdoors, the existing equipment does not really perform corresponding temperature conversion and optimization according to the changes of the environment temperature and the body temperature, so that the equipment is required to be incapable of being used at the environment temperature beyond the expected temperature, usually 20-30 ℃, at the moment, if the outdoor environment temperature cannot meet the requirement, a movable board house or a tent is required to be additionally added, the implementation difficulty and the cost are greatly increased, and in some scenes, such as outdoor access control and outdoor gate machines, the protection device cannot be added at all due to the field and installation limitations.
2. Inaccurate environment temperature: the mode of taking the ring temperature through the infrared temperature measurement lens is greatly dependent on the field environment, the shielding of any non-human body can influence the environment value and the actual deviation to be large, and particularly the ring temperature cannot be acquired aiming at the outdoor open installation position and angle.
3, the deployment is not flexible, and some manufacturers add the ring temperature sensor to the equipment, which not only causes the difference between the ring temperature of the possible installation position of the equipment and the real ring temperature, but also causes each equipment to need a separate ring temperature sensor, increases the overall deployment cost, and needs to be configured separately in actual use.
Disclosure of Invention
The invention is realized by the following technical scheme that the background system pushes the ring temperature to the human body temperature measuring equipment installed on site, and the real and accurate human body temperature is obtained by combining the body surface temperature conversion algorithm.
An outdoor infrared human body temperature measurement method comprises the following steps:
step 1, an environment temperature sensor collects body surface temperature data of a human body;
step 2, the ambient temperature sensor transmits the body surface temperature data and the ID value of the equipment to a background server;
step 3, the background server converts the body surface temperature data through a temperature conversion algorithm to obtain the real human body temperature;
further, the background server sets a unique ID for each ambient temperature sensor, and each ID corresponds to a real field environment.
Furthermore, the environment temperature sensor adopts a platinum thermal resistor for temperature measurement, and the resistance value of the platinum thermal resistor can change along with the change of the actual temperature.
Further, the background server can update the environment temperature data at regular time and store the latest environment temperature data.
Furthermore, the device using the method configures the ambient temperature sensor in an outdoor temperature measurement with an independent computing unit intelligent terminal and an independent display unit, or a temperature measurement panel with a face recognition function and a handheld outdoor temperature measurement terminal, and the device is accessed to a background server in a Wi-Fi or wired mode.
Outdoor infrared human temperature measurement system based on outdoor temperature measurement, outdoor temperature measurement terminal and server that communicate each other, outdoor temperature measurement terminal includes: the system comprises an ambient temperature sensor, a main control chip, an interface chip and a Wi-Fi chip which are connected through a circuit, and the system is embedded or externally connected with an outdoor temperature measuring terminal for communication.
The invention has the beneficial effects that: the defect that the existing infrared thermometer cannot adapt to outdoor environment and outdoor temperature is overcome, and the problem that outdoor temperature measurement is inaccurate or the cost of a building system is too high is solved.
Drawings
FIG. 1 is a block diagram of an infrared temperature measurement system in an embodiment of the invention.
FIG. 2 is a block diagram of an embedded module system architecture in an embodiment of the invention.
FIG. 3 is a block diagram of an independent module system architecture according to an embodiment of the present invention.
Detailed Description
The figures and examples of the invention are described in detail below, but the invention can be implemented in many different ways, which are defined and covered by the claims.
A high-precision infrared temperature measurement method based on face recognition on the basis of the existing infrared temperature measurement terminal comprises the following steps:
the first embodiment is as follows:
step 1: ambient temperature acquisition
The environment temperature sensor belongs to independent temperature sensor, and adopts platinum resistance principle work itself, and the resistance can change along with actual temperature's change, can directly use at the open air, because environment temperature sensor itself does not belong to infrared temperature measurement mode, therefore the frequency and the numerical value of sensor collection temperature have no direct relation with infrared temperature measurement sensor. The environment temperature sensor can be flexibly installed outdoors according to the field condition. The background system can be accessed in a Wi-Fi or wired mode without being directly connected with the equipment.
Step 2: ambient temperature push
The background system sets a unique ID for each ambient temperature sensor, and each ID corresponds to a real site environment, so that the background can know which site the ambient temperature sensor is installed on according to the ID of the ambient temperature sensor. And then pushing the ring temperature to the appointed temperature measuring equipment through the network.
And step 3: temperature conversion
The temperature measuring equipment only needs to acquire the body surface temperature of the forehead of the measured person according to the actual environment temperature pushed by the background, and then the real human body temperature is acquired through a temperature conversion algorithm.
And (3) updating the temperature, wherein when the outdoor environment temperature changes, the forehead body surface temperature of the human body also changes, the data of the environment temperature sensor also changes at the moment, and the system can update the environment temperature data at regular time to ensure that the environment temperature during temperature conversion is the most real environment temperature at present.
The value of the environmental temperature can be obtained by adding an environmental temperature sensor on the temperature measuring equipment, and then the real human body temperature is calculated by the body surface temperature and body temperature conversion mode.
In the embodiment of the invention, the whole process and scheme of independent environment temperature value taking are included, the integration of the environment temperature sensor and the temperature measuring equipment is not limited, and the installation position of the environment temperature sensor and the communication and acquisition mode of the temperature are not limited.
In the embodiment of the invention, the device using the method configures the ambient temperature sensor at an intelligent outdoor temperature measuring terminal with an independent computing unit intelligent terminal and an independent display unit, or a temperature measuring panel combined with a face recognition function and a handheld outdoor temperature measuring terminal, and the device is accessed to a background server in a Wi-Fi or wired mode. The specific functional configuration of the infrared temperature measuring equipment does not need to be determined. The method and the device of the invention have wide application range and solve the defects of the prior art pointed out in the background technology.
As shown in fig. 1, the outdoor infrared human body temperature measurement system implementing the method comprises: the system comprises an environment temperature sensor, a main control chip, an interface chip and a Wi-Fi chip which are connected through a circuit. The system is embedded or externally connected with an outdoor temperature measuring terminal for communication. As shown in fig. 2 to 3, the present system has two forms.
An ambient temperature sensor: the temperature sensor is responsible for collecting temperature from the environment and converting the original temperature data into 485 data formats, and the environment temperature sensor adopts a waterproof sealing probe and can be directly placed in the outdoor environment.
Interface chip: the model is MAX485, the transceiver is a low-power-consumption transceiver for 485 communication, and the transceiver is used for converting a received differential signal of an ambient temperature sensor into a half-duplex signal which can be received by a single chip microcomputer and plays a role in driving and circuit protection.
A main control chip: the model is S3C2440, which is responsible for processing logic control of a lending chip and a circuit and has the functions of internal cache and power-down storage.
A Wi-Fi chip: the model of the system is BCM4325, and the system is responsible for sending the temperature data of the sensor to a face recognition terminal or a background system infinitely through a wifi protocol.
The working principle is as follows: after the face temperature measurement terminal and the environment temperature sensor are installed and powered on, the face terminal is manually clicked to obtain an environment temperature value as an initial reference value of a temperature measurement algorithm, at the moment, the face terminal can request data through a wifi instruction, and after receiving a protocol instruction, the BCM4325 informs the main control chip S3C2440 to obtain a real environment temperature value from the environment temperature sensor and then sends the real environment temperature value to face terminal equipment. When the ambient temperature is acquired to be abnormal, the main control chip can control the LED lamp to alarm abnormally through the peripheral circuit, abnormal information can be reported to the face temperature measuring terminal through the wifi module, the abnormal information can be displayed in time by the temperature measuring terminal, and operation and maintenance personnel can conveniently and timely troubleshoot the problems.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An outdoor infrared human body temperature measurement method comprises the following steps:
step 1, an environment temperature sensor collects body surface temperature data of a human body;
step 2, the ambient temperature sensor transmits the body surface temperature data and the ID value of the device to an outdoor temperature measuring terminal or a background server;
and 3, converting the body surface temperature data by the outdoor temperature measuring terminal or the background server through a temperature conversion algorithm to obtain the real human body temperature.
2. The outdoor infrared human body temperature measurement method according to claim 1, wherein the background server sets a unique ID for each ambient temperature sensor, and each ID corresponds to a real field environment.
3. The outdoor infrared human body temperature measurement method according to claim 1, wherein the environment temperature sensor measures temperature by using a platinum thermal resistor, and the resistance value of the platinum thermal resistor changes along with the change of actual temperature.
4. The outdoor infrared human body temperature measurement method according to claim 1, wherein the background server updates the ambient temperature data at regular time and stores the latest ambient temperature data.
5. The outdoor infrared human body temperature measurement method according to claim 1, wherein the device using the method is used for configuring an ambient temperature sensor in an outdoor temperature measurement terminal with an independent computing unit intelligent terminal and an independent display unit, or a temperature measurement panel and a handheld outdoor temperature measurement terminal which are combined with a face recognition function, and the device is accessed to a background server in a Wi-Fi or wired mode.
6. An outdoor infrared human body temperature measurement system by which the outdoor infrared human body temperature measurement method according to any one of claims 1 to 4 is implemented, characterized in that the outdoor infrared human body temperature measurement system, an outdoor temperature measurement terminal and a server which communicate with each other, the outdoor temperature measurement terminal includes: the system comprises an ambient temperature sensor, a main control chip, an interface chip and a Wi-Fi chip which are connected through a circuit, and the system is embedded or externally connected with an outdoor temperature measuring terminal for communication.
7. The outdoor infrared human body temperature measurement system of claim 6, wherein the Wi-Fi chip is connected with an antenna circuit.
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| CN202010574652.1A CN111693148A (en) | 2020-06-22 | 2020-06-22 | Outdoor infrared human body temperature measurement method and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461376A (en) * | 2020-12-07 | 2021-03-09 | 爱沃泰科技(深圳)有限公司 | Self-adaptive infrared sensor signal sampling algorithm |
| CN113252182A (en) * | 2021-06-04 | 2021-08-13 | 南京甄视智能科技有限公司 | Method and system for outdoor face recognition and human body temperature measurement |
| CN113310599A (en) * | 2021-06-04 | 2021-08-27 | 南京甄视智能科技有限公司 | Temperature measurement method and system based on indoor environment |
-
2020
- 2020-06-22 CN CN202010574652.1A patent/CN111693148A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461376A (en) * | 2020-12-07 | 2021-03-09 | 爱沃泰科技(深圳)有限公司 | Self-adaptive infrared sensor signal sampling algorithm |
| CN112461376B (en) * | 2020-12-07 | 2024-05-24 | 爱沃泰科技(深圳)有限公司 | Adaptive infrared sensor signal sampling algorithm |
| CN113252182A (en) * | 2021-06-04 | 2021-08-13 | 南京甄视智能科技有限公司 | Method and system for outdoor face recognition and human body temperature measurement |
| CN113310599A (en) * | 2021-06-04 | 2021-08-27 | 南京甄视智能科技有限公司 | Temperature measurement method and system based on indoor environment |
| CN113252182B (en) * | 2021-06-04 | 2021-10-12 | 南京甄视智能科技有限公司 | Method and system for outdoor face recognition and human body temperature measurement |
| CN113310599B (en) * | 2021-06-04 | 2024-06-11 | 小视科技(江苏)股份有限公司 | Temperature measurement method and system based on indoor environment |
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