CN111337146A - External temperature reference source correction system and method for infrared thermometer - Google Patents
External temperature reference source correction system and method for infrared thermometer Download PDFInfo
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- CN111337146A CN111337146A CN202010328303.1A CN202010328303A CN111337146A CN 111337146 A CN111337146 A CN 111337146A CN 202010328303 A CN202010328303 A CN 202010328303A CN 111337146 A CN111337146 A CN 111337146A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012937 correction Methods 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 89
- 238000006073 displacement reaction Methods 0.000 claims abstract description 42
- 230000000903 blocking effect Effects 0.000 claims abstract description 36
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 21
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000036760 body temperature Effects 0.000 description 10
- 238000001514 detection method Methods 0.000 description 9
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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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Abstract
The invention relates to a system and a method for correcting an external temperature reference source of an infrared thermometer, wherein the system comprises a displacement device and a metal baffle plate internally provided with a temperature sensor; the displacement device is used for driving the metal blocking piece to move to the front of the lens of the infrared thermometer to shield the lens, and driving the metal blocking piece to be removed from the front of the lens after the metal blocking piece stays in front of the lens for a preset time; the metal baffle is used as an external temperature measurement reference source, and the internal temperature of the metal baffle is measured by a built-in temperature sensor; the infrared thermometer is used for acquiring the internal temperature output by the temperature sensor and calibrating the reference temperature again according to the internal temperature. The invention can not only periodically carry out temperature correction on the infrared thermometer, but also can realize that the infrared thermometer can still carry out temperature correction on the temperature drift phenomenon on the premise of not using external black body equipment, thereby avoiding the higher cost of purchasing black bodies and the higher requirement of arranging the black bodies on the use space, and saving the working energy consumption of the whole temperature measuring system.
Description
Technical Field
The invention relates to the field of infrared temperature measurement, in particular to a system and a method for correcting an external temperature reference source of an infrared thermometer.
Background
For malignant infectious diseases such as SARS and new coronary pneumonia, timely identification and proper treatment of infected persons are important means for preventing the spread of epidemic situation. Because the infected people of the diseases are often accompanied by fever and high fever symptoms, screening the abnormal body temperature people in the people becomes one of the main methods for identifying the infected people. The infrared thermometer can realize contactless body temperature measurement on a large number of people under the condition that the pedestrian passing efficiency is not influenced, and the equipment is suitable for places with high crowd density and large pedestrian flow, such as airports, railway stations, subway stations and the like. Due to environmental influences and the characteristics of the infrared thermometer, the infrared thermometer inevitably has temperature drift, namely body temperature measurement errors, and further leads to the missed report or false report of abnormal body temperature patients. The prior art scheme for solving the technical problems is to recalibrate the temperature of the infrared thermometer (fix temperature correction) by using a black body placed at a fixed position in a detection view field, namely recalibrate the reference temperature of the infrared thermometer and correct the drift temperature. However, in the prior art, the blackbody equipment is required to be arranged at a fixed position in the field of view of the infrared thermometer, and the blackbody equipment needs to be arranged in the optimal temperature measuring range, so that strict requirements on the use space and the environment are met, and the blackbody equipment is inconvenient to use in the field or narrow space where power supply is inconvenient; in addition, the blackbody equipment is additionally purchased, so that the cost of the whole temperature measuring system is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing an external temperature reference source correction system and method for an infrared thermometer, which can avoid the higher cost of purchasing a black body and the higher requirement of arranging the black body on the use space, and can save the working energy consumption of the whole temperature measurement system.
The technical scheme for solving the technical problems is as follows: an external temperature reference source correction system of an infrared thermometer comprises a displacement device and a metal baffle plate internally provided with a temperature sensor, wherein the displacement device is matched with the infrared thermometer, and the metal baffle plate is arranged on the displacement device;
the displacement device is used for driving the metal blocking piece to move to the front of the lens of the infrared thermometer to shield the lens when the temperature of the infrared thermometer is recalibrated, and driving the metal blocking piece to be removed from the front of the lens after the metal blocking piece stays in front of the lens for a preset time;
the metal baffle is used as an external temperature measurement reference source, and the internal temperature of the metal baffle is measured by a built-in temperature sensor;
the infrared thermometer is used for acquiring the internal temperature output by the temperature sensor and calibrating the reference temperature again according to the internal temperature.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the displacement device is fixedly arranged on a shell of the infrared thermometer.
Further, the displacement device is specifically a steering engine.
Further, a timer is arranged in the infrared thermometer, and the displacement device is specifically configured to drive the metal blocking piece to move to a position in front of the lens of the infrared thermometer to shield the lens when the accumulated timing of the timer reaches a preset period, and after the metal blocking piece stays in front of the lens for a preset time, the timer is cleared and restarted, and the metal blocking piece is driven to be removed from the position in front of the lens for resetting.
Further, the infrared thermometer is specifically configured to measure a surface temperature of the metal barrier when the metal barrier shields the lens, obtain the internal temperature currently output by the temperature sensor, and recalibrate the reference temperature according to a relative temperature relationship between the surface temperature and the internal temperature.
Based on the system for correcting the external temperature reference source of the infrared thermometer, the invention also provides a method for correcting the external temperature reference source of the infrared thermometer.
A method for correcting an external temperature reference source of an infrared thermometer by using the correction system of the external temperature reference source of the infrared thermometer comprises the following steps,
the displacement device drives a metal baffle plate with a built-in temperature sensor to move to the front of a lens of an infrared thermometer to shield the lens, and the metal baffle plate stays in front of the lens for a preset time;
the temperature sensor measures the internal temperature of the metal baffle sheet within a preset time of the metal baffle sheet staying in front of the lens; after the metal blocking piece stays in front of the lens for a preset time, the displacement device drives the metal blocking piece to be removed from the front of the lens;
and the infrared thermometer acquires the internal temperature output by the temperature sensor and recalibrates the reference temperature according to the internal temperature.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, a timer is arranged in the infrared thermometer;
the displacement device drives a metal baffle plate with a built-in temperature sensor to move to the front of a lens of an infrared thermometer to shield the lens and stay in front of the lens for a preset time, specifically,
when the accumulated timing of the timer reaches a preset period, the displacement device drives the metal blocking piece to move to the front of the lens of the infrared thermometer to shield the lens, and the metal blocking piece stays in front of the lens for a preset time.
Further, after the metal blocking piece stays in front of the lens for a preset time, the timer is reset to reset, and the displacement device drives the metal blocking piece to be removed from the front of the lens to reset.
Further, the infrared thermometer obtains the internal temperature output by the temperature sensor, and recalibrates the reference temperature according to the internal temperature, specifically comprising the following steps,
and the infrared thermometer measures the surface temperature of the metal baffle plate when the metal baffle plate shields the lens, simultaneously obtains the internal temperature currently output by the temperature sensor, and recalibrates the reference temperature according to the relative temperature relationship between the surface temperature and the internal temperature.
The invention has the beneficial effects that: the invention relates to a system and a method for correcting an external temperature reference source of an infrared thermometer, which are used for correcting the temperature of the infrared thermometer by utilizing a metal baffle plate with a temperature sensor integrated at the front end of the infrared thermometer, and the scheme can not only periodically correct the temperature of the infrared thermometer, but also continuously keep the temperature measurement accuracy of the infrared thermometer, further ensure the screening of abnormal body temperature people in a crowd, effectively avoid false detection and omission, but also realize that the infrared thermometer can correct the temperature of the temperature drift phenomenon on the premise of not using external black body equipment, avoid the higher cost of purchasing a black body and the higher requirement of arranging the black body on the use space, and save the working energy consumption of the whole temperature measurement system; the invention has good improvement effect on the problem of temperature measurement error caused by temperature deviation of the infrared thermometer.
Drawings
FIG. 1 is a schematic structural diagram of an external temperature reference source correction system of an infrared thermometer according to the present invention;
FIG. 2 is an overall flowchart of the external temperature reference source calibration system of the infrared thermometer during temperature measurement and calibration;
FIG. 3 is a schematic diagram of a calibration method for an external temperature reference source of an infrared thermometer according to the present invention;
FIG. 4 is a flowchart of a method for calibrating an external temperature reference source of an infrared thermometer according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a displacement device, 2, a metal baffle, 3 and an infrared thermometer.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, an external temperature reference source correction system of an infrared thermometer comprises a displacement device 1 and a metal baffle 2 with a built-in temperature sensor, wherein the displacement device 1 is matched with an infrared thermometer 3, and the metal baffle 2 is installed on the displacement device 1;
the displacement device 1 is used for driving the metal baffle 2 to move to the front of the lens of the infrared thermometer 3 to shield the lens when the infrared thermometer 3 carries out temperature recalibration, and driving the metal baffle 2 to be removed from the front of the lens after the metal baffle stays in front of the lens for a preset time;
the metal baffle plate 2 is used as an external temperature measurement reference source and measures the internal temperature through a built-in temperature sensor;
the infrared thermometer 3 is used for acquiring the internal temperature output by the temperature sensor and calibrating the reference temperature again according to the internal temperature.
In the present embodiment, it is preferred that,
the displacement device 1 is fixedly arranged on the shell of the infrared thermometer 3. The displacement device 1 is specifically a steering engine.
The temperature sensor can be connected with an internal circuit of the infrared thermometer 3 through a lead and can also be in wireless connection through a wireless communication module.
The infrared thermometer 3 is internally provided with a timer, and the displacement device 1 is specifically configured to drive the metal blocking piece 2 to move to the front of the lens of the infrared thermometer 3 to shield the lens when the accumulated timing of the timer reaches a preset period, clear the timer to reset after the metal blocking piece stays in the front of the lens for a preset time, and drive the metal blocking piece 2 to be removed from the front of the lens to reset.
The infrared thermometer 3 is specifically configured to measure the surface temperature of the metal baffle 2 when the metal baffle 2 shields the lens, obtain the internal temperature currently output by the temperature sensor, and recalibrate the reference temperature according to a relative temperature relationship between the surface temperature and the internal temperature.
In the invention, the infrared thermometer 3 has extremely strong sensitivity to various forms of heat radiation of the surrounding environment, so that the temperature measurement is easily influenced by the change of the environment temperature and even the temperature change of the device, thereby causing inaccurate temperature measurement. Even if the temperature of the infrared thermometer 3 is corrected, the temperature of the infrared thermometer still cannot be accurately measured after the infrared thermometer works for a period of time, and the temperature needs to be corrected again. Therefore, the system of the invention can be used for calibrating the reference temperature to realize the temperature correction.
FIG. 2 is an overall flowchart of the external temperature reference source calibration system of the infrared thermometer during temperature measurement and calibration. After the infrared thermometer is started, an internal timer of the steering engine is controlled to start timing immediately, and when a person enters a temperature measurement area, the infrared thermometer measures the temperature of the person to be detected and judges whether body temperature data are abnormal or not. The patient with normal body temperature can pass through the device quickly; and if the body temperature is detected to be abnormal, an alarm is sent out to wait for the manual reinspection and subsequent treatment of related workers. In the whole detection process, if the timer times to reach a preset period, the infrared thermometer is subjected to rapid temperature correction, and if not, the body temperature of the pedestrian is continuously detected. In the whole detection process, the temperature of the infrared thermometer is periodically corrected, so that the infrared thermometer can continuously keep the accuracy of temperature measurement, the screening of abnormal body temperature people in a crowd is further ensured, and the false detection and the omission detection can be effectively avoided.
Based on the system for correcting the external temperature reference source of the infrared thermometer, the invention also provides a method for correcting the external temperature reference source of the infrared thermometer.
As shown in FIG. 3, a method for calibrating an external temperature reference source of an infrared thermometer by using the calibration system for an external temperature reference source of an infrared thermometer comprises the following steps,
the displacement device drives a metal baffle plate with a built-in temperature sensor to move to the front of a lens of an infrared thermometer to shield the lens, and the metal baffle plate stays in front of the lens for a preset time;
the temperature sensor measures the internal temperature of the metal baffle sheet within a preset time of the metal baffle sheet staying in front of the lens; after the metal blocking piece stays in front of the lens for a preset time, the displacement device drives the metal blocking piece to be removed from the front of the lens;
and the infrared thermometer acquires the internal temperature output by the temperature sensor and recalibrates the reference temperature according to the internal temperature.
In this particular embodiment: a timer is arranged in the infrared thermometer;
the displacement device drives a metal baffle plate with a built-in temperature sensor to move to the front of a lens of an infrared thermometer to shield the lens and stay in front of the lens for a preset time, specifically,
when the accumulated timing of the timer reaches a preset period, the displacement device drives the metal blocking piece to move to the front of the lens of the infrared thermometer to shield the lens, and the metal blocking piece stays in front of the lens for a preset time.
More specifically, the timer is arranged in a control circuit in the infrared thermometer, when the timer reaches a preset period, the control circuit sends an instruction, the displacement device starts to act to drive the metal baffle to move to the front of the lens of the infrared thermometer to shield the lens, then after the metal baffle stays for a preset time, the control circuit sends the instruction again, and the displacement device resets.
Further, after the metal blocking piece stays in front of the lens for a preset time, the timer is reset to reset, and the displacement device drives the metal blocking piece to be removed from the front of the lens to reset.
In this particular embodiment: the infrared thermometer obtains the internal temperature output by the temperature sensor and recalibrates the reference temperature according to the internal temperature, and the method specifically comprises the following steps,
and the infrared thermometer measures the surface temperature of the metal baffle plate when the metal baffle plate shields the lens, simultaneously obtains the internal temperature currently output by the temperature sensor, and recalibrates the reference temperature according to the relative temperature relationship between the surface temperature and the internal temperature.
In this embodiment, a flow of the external temperature reference source correction method of the infrared thermometer is shown in fig. 4, and the specific flow is as follows:
1) when the infrared thermometer is started, the timer starts timing immediately;
2) the timer accumulates the timing to reach a preset period;
3) a steering gear (a displacement device is specifically a steering gear) which is arranged outside and on the infrared thermometer is started and drives a metal separation blade with a built-in temperature sensor to move towards the front of the lens;
4) the metal baffle plate moves to a position where the lens is completely shielded and stops;
5) reading the internal temperature of the metal baffle plate measured by the current temperature sensor by an infrared thermometer;
6) the infrared thermometer automatically recalibrates the reference temperature according to the internal temperature;
7) after the reference temperature is calibrated again, resetting the timer and timing again;
8) the steering engine drives the metal separation blade to reset.
Through the periodic correction of the external temperature reference source, the infrared thermometer can continuously keep the accuracy of temperature measurement, thereby ensuring the screening of abnormal body temperature people in a crowd and effectively avoiding false detection and missed detection.
The invention relates to a system and a method for correcting an external temperature reference source of an infrared thermometer, which are used for correcting the temperature of the infrared thermometer by utilizing a metal baffle plate with a temperature sensor integrated at the front end of the infrared thermometer, and the scheme can not only periodically correct the temperature of the infrared thermometer, but also continuously keep the temperature measurement accuracy of the infrared thermometer, further ensure the screening of abnormal body temperature people in a crowd, effectively avoid false detection and omission, but also realize that the infrared thermometer can correct the temperature of the temperature drift phenomenon on the premise of not using external black body equipment, avoid the higher cost of purchasing a black body and the higher requirement of arranging the black body on the use space, and save the working energy consumption of the whole temperature measurement system; the invention has good improvement effect on the problem of temperature measurement error caused by temperature deviation of the infrared thermometer.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides an external temperature reference source correction system of infrared thermometer which characterized in that: the device comprises a displacement device and a metal baffle plate internally provided with a temperature sensor, wherein the displacement device is matched with an infrared thermometer, and the metal baffle plate is arranged on the displacement device;
the displacement device is used for driving the metal blocking piece to move to the front of the lens of the infrared thermometer to shield the lens when the temperature of the infrared thermometer is recalibrated, and driving the metal blocking piece to be removed from the front of the lens after the metal blocking piece stays in front of the lens for a preset time;
the metal baffle is used as an external temperature measurement reference source, and the internal temperature of the metal baffle is measured by a built-in temperature sensor;
the infrared thermometer is used for acquiring the internal temperature output by the temperature sensor and calibrating the reference temperature again according to the internal temperature.
2. The external temperature reference source correction system of the infrared thermometer according to claim 1, characterized in that: the displacement device is fixedly arranged on the shell of the infrared thermometer.
3. The external temperature reference source correction system of the infrared thermometer according to claim 1, characterized in that: the displacement device is specifically a steering engine.
4. The external temperature reference source correction system of the infrared thermometer according to any one of claims 1 to 3, characterized in that: the infrared thermometer is internally provided with a timer, and the displacement device is specifically used for driving the metal blocking piece to move to the front of the lens of the infrared thermometer to shield the lens when the accumulated timing of the timer reaches a preset period, resetting the timer after the metal blocking piece stays in front of the lens for a preset time, and driving the metal blocking piece to be removed from the front of the lens for resetting.
5. The external temperature reference source correction system of the infrared thermometer according to any one of claims 1 to 3, characterized in that: the infrared thermometer is specifically configured to measure a surface temperature of the metal barrier when the metal barrier shields the lens, obtain the internal temperature currently output by the temperature sensor, and recalibrate the reference temperature according to a relative temperature relationship between the surface temperature and the internal temperature.
6. A method for correcting an external temperature reference source of an infrared thermometer is characterized by comprising the following steps: the correction is carried out by using the external temperature reference source correction system of the infrared thermometer of any one of the claims 1 to 5, comprising the following steps,
the displacement device drives a metal baffle plate with a built-in temperature sensor to move to the front of a lens of an infrared thermometer to shield the lens, and the metal baffle plate stays in front of the lens for a preset time;
the temperature sensor measures the internal temperature of the metal baffle sheet within a preset time of the metal baffle sheet staying in front of the lens; after the metal blocking piece stays in front of the lens for a preset time, the displacement device drives the metal blocking piece to be removed from the front of the lens;
and the infrared thermometer acquires the internal temperature output by the temperature sensor and recalibrates the reference temperature according to the internal temperature.
7. The method for correcting the external temperature reference source of the infrared thermometer according to claim 6, characterized in that: a timer is arranged in the infrared thermometer;
the displacement device drives a metal baffle plate with a built-in temperature sensor to move to the front of a lens of an infrared thermometer to shield the lens and stay in front of the lens for a preset time, specifically,
when the accumulated timing of the timer reaches a preset period, the displacement device drives the metal blocking piece to move to the front of the lens of the infrared thermometer to shield the lens, and the metal blocking piece stays in front of the lens for a preset time.
8. The method for correcting the external temperature reference source of the infrared thermometer according to claim 7, characterized in that: after the metal blocking piece stays in front of the lens for a preset time, the timer is cleared and times again, and the displacement device drives the metal blocking piece to be removed from the front of the lens and reset.
9. The external temperature reference source correction method of the infrared thermometer according to any one of claims 6 to 8, characterized in that: the infrared thermometer obtains the internal temperature output by the temperature sensor and recalibrates the reference temperature according to the internal temperature, and the method specifically comprises the following steps,
and the infrared thermometer measures the surface temperature of the metal baffle plate when the metal baffle plate shields the lens, simultaneously obtains the internal temperature currently output by the temperature sensor, and recalibrates the reference temperature according to the relative temperature relationship between the surface temperature and the internal temperature.
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| CN202010328303.1A CN111337146A (en) | 2020-04-23 | 2020-04-23 | External temperature reference source correction system and method for infrared thermometer |
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| CN202010328303.1A CN111337146A (en) | 2020-04-23 | 2020-04-23 | External temperature reference source correction system and method for infrared thermometer |
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| CN112683409A (en) * | 2021-03-18 | 2021-04-20 | 深圳市理邦精密仪器股份有限公司 | Temperature detection device, temperature calibration method, and computer-readable storage medium |
| CN112880838A (en) * | 2021-02-08 | 2021-06-01 | 深圳市宇通联发科技有限公司 | Infrared body temperature detection method, storage medium and infrared body temperature detection device |
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