CN111307300B - Temperature calibration device and method for infrared temperature measurement sensor - Google Patents
Temperature calibration device and method for infrared temperature measurement sensor Download PDFInfo
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- CN111307300B CN111307300B CN202010309484.3A CN202010309484A CN111307300B CN 111307300 B CN111307300 B CN 111307300B CN 202010309484 A CN202010309484 A CN 202010309484A CN 111307300 B CN111307300 B CN 111307300B
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000012937 correction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000001931 thermography 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
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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 temperature calibration device and method of an infrared temperature measurement sensor, which is characterized in that: comprises a shell (1), a temperature measuring sensor (2), a calibration device (3), a calibration sensor (4) and a signal processing device (5); the calibration method of the black body with high price in the prior art is replaced, online calibration is realized by adopting a mode of overlapping partial measurement ranges while temperature detection is carried out on the calibration sensor with relatively high precision, the time loss of pre-calibration and possible deviation are avoided, calibration is accurate, the process is stable, additional adjustment is not needed, and the use is convenient.
Description
Technical Field
The invention relates to the technical field of temperature measurement sensors, in particular to a temperature calibration device and method of an infrared temperature measurement sensor.
Background
The core element of the infrared thermal imaging device, the multi-point infrared thermometer and the matrix type temperature measuring device is an infrared temperature measuring chip, the chip is formed by arranging a plurality of temperature measuring sensors into a matrix shape and can measure the temperature of a plurality of positions in a certain angle range, the existing temperature measuring sensors are greatly influenced by the ambient temperature, the distance between the sensors and an object to be measured and even the air humidity, and the error is large, in order to correct the error and realize calibration, a user often adopts an external black body for correction in advance, or the actual temperature is manually measured and compared with the temperature measured by the temperature measuring sensors, so that the detection precision of the infrared temperature measuring sensors is corrected; however, the correction mode in the prior art has the defects that the black body is high in price and even higher than the sensor, the external temperature measurement correction cannot be carried out in real time, and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a temperature calibration device and method of an infrared temperature measurement sensor.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an infrared temperature sensor's temperature calibrating device which characterized in that: the device comprises a shell, a temperature measuring sensor, a calibration device, a calibration sensor and a signal processing device; the temperature measurement sensor, the calibration device, the calibration sensor and the signal processing device are respectively arranged in the shell, the calibration sensor is arranged in the calibration device, the measurement direction of the temperature measurement sensor is the same as that of the calibration sensor, the calibration measurement range of the calibration sensor is located in the original measurement range of the temperature measurement sensor, the temperature measurement sensor and the calibration sensor are respectively in signal connection with the signal processing device, and the signal processing device calibrates the temperature measurement range of the temperature measurement sensor according to the received measurement data and calibration data in the calibration measurement range.
Furthermore, the calibration device is made of non-reflective materials.
Further, the calibration device is a black body.
Further, the calibration measurement range can be adjusted according to the requirement of calibration precision.
Further, the detection precision of the calibration sensor is higher than that of the temperature measurement sensor.
Further, the invention also provides a temperature calibration method of the infrared temperature measurement sensor, which is characterized in that: the method comprises the following steps:
1) measuring the temperature of a certain cell on the surface of the object to be measured in the original measurement range by using a temperature measuring sensor to obtain an original measurement value T0;
2) measuring the temperature of the corresponding cell in the calibration measurement range of the surface of the object to be measured in the original measurement range through the calibration sensor to obtain a calibration measurement value T1;
3) the temperature sensor transmits an original measured value T0 to the signal processing device, the calibration sensor transmits a calibration measured value T1 to the signal processing device, and after data processing, calibration parameters are obtained, wherein the calibration parameters are
Wherein,
ri is a calibration coefficient of the ith position cell on the object to be measured;
li is the distance between the ith position cell and the circle center position cell on the object to be measured;
mi is the detection coefficient of the temperature sensor;
ni is a detection coefficient of the calibration sensor;
t0i is the original measured value of the ith position cell detected by the temperature sensor;
t1i is the calibration measurement value of the ith position cell detected by the calibration sensor;
4) the temperature measurement sensor measures the temperature of the cells in the original measurement range but outside the calibration measurement range, and sends the measurement result to the signal processing device, and the signal processing device calibrates the temperature measurement of the cells in the temperature measurement range according to the calibration coefficient.
The invention has the beneficial effects that:
(1) the calibration method of the black body with high price in the prior art is replaced, online calibration is realized by adopting a mode of overlapping partial measurement ranges while temperature detection is carried out on the calibration sensor with relatively high precision, the time loss of pre-calibration and possible deviation are avoided, calibration is accurate, the process is stable, additional adjustment is not needed, and the use is convenient.
Drawings
Fig. 1 is a schematic structural diagram of a temperature calibration device of an infrared temperature measurement sensor according to the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a temperature calibration device of an infrared temperature measurement sensor comprises a shell 1, a temperature measurement sensor 2, a calibration device 3, a calibration sensor 4 and a signal processing device 5; wherein, the temperature sensor 2, the calibrating device 3, the calibrating sensor 4, and the signal processing device 5 set up in the inside of casing 1 respectively, the calibrating sensor 4 sets up in the inside of calibrating device 3, the measuring direction of temperature sensor 2 is the same with the measuring direction of calibrating sensor 4 and the calibrating measuring range S2 of calibrating sensor 4 is located the inside of the original measuring range S0 of temperature sensor 2, temperature sensor 2 and calibrating sensor 4 are respectively with signal processing device 5 signal connection, the signal processing device 5 calibrates the temperature measuring range S1 of temperature sensor 2 according to the measured data and the calibration data in the calibration measuring range S2 that receive.
Specifically, the calibration device 3 is made of non-reflective materials, so that the detection precision and the calibration accuracy of the calibration device 3 are effectively guaranteed.
Specifically, the calibration device 3 is made of a black body, and preferably, the calibration device 3 may also be made of other materials with satisfactory detection accuracy.
Specifically, the calibration measurement range S2 can be adjusted according to the requirement of the calibration accuracy, so that the application range is wide, and the use requirements in different ranges can be met.
Specifically, the detection accuracy of the calibration sensor 4 is higher than that of the temperature sensor 2, thereby ensuring the effectiveness and accuracy of calibration with higher detection accuracy.
Specifically, the invention also provides a temperature calibration method of the infrared temperature measurement sensor, which comprises the following steps:
1) measuring the temperature of a certain cell on the surface of the object to be measured in the original measurement range S0 by using a temperature measuring sensor to obtain an original measurement value T0;
2) measuring the temperature of the corresponding cell in the calibration measurement range S2 of the surface of the object to be measured in the original measurement range S0 through the calibration sensor to obtain a calibration measurement value T1;
3) the temperature sensor transmits an original measured value T0 to the signal processing device, the calibration sensor transmits a calibration measured value T1 to the signal processing device, and after data processing, calibration parameters are obtained, wherein the calibration parameters are
Wherein,
ri is a calibration coefficient of the ith position cell on the object to be measured;
li is the distance between the ith position cell and the circle center position cell on the object to be measured;
mi is the detection coefficient of the temperature sensor;
ni is a detection coefficient of the calibration sensor;
t0i is the original measured value of the ith position cell detected by the temperature sensor;
t1i is the calibration measurement value of the ith position cell detected by the calibration sensor;
therefore, on the premise of simultaneously considering the detection position, the detection distance, the detection coefficients of the temperature sensor and the calibration sensor, the detection result of the temperature sensor is calibrated and corrected in real time.
4) The temperature sensor measures the temperature of the cells in the original measurement range S0 but outside the temperature measurement range S1 of the calibration measurement range S2, and sends the measurement result to the signal processing device, and the signal processing device calibrates the temperature measurement of the cells in the temperature measurement range S1 according to the calibration coefficient.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (1)
1. A temperature calibration method of an infrared temperature measurement sensor is characterized by comprising the following steps: for the use method of temperature calibration device, the temperature calibration device includes: the temperature measurement device comprises a shell (1), a temperature measurement sensor (2), a calibration device (3), a calibration sensor (4) and a signal processing device (5); the temperature measurement sensor (2), the calibration device (3), the calibration sensor (4) and the signal processing device (5) are respectively arranged in the shell (1), the calibration sensor (4) is arranged in the calibration device (3), the measurement directions of the temperature measurement sensor (2) and the calibration sensor (4) are the same, the calibration measurement range (S2) of the calibration sensor (4) is located in the original measurement range (S0) of the temperature measurement sensor (2), the temperature measurement sensor (2) and the calibration sensor (4) are respectively in signal connection with the signal processing device (5), and the signal processing device (5) calibrates the temperature measurement range (S1) of the temperature measurement sensor (2) according to the received measurement data and calibration data in the calibration measurement range (S2);
the calibration method comprises the following steps:
1) measuring the temperature of a certain cell on the surface of the object to be measured in the original measuring range (S0) by a temperature measuring sensor to obtain an original measuring value T0;
2) measuring the temperature of the corresponding cell in the calibration measurement range (S2) of the surface of the object to be measured in the original measurement range (S0) through the calibration sensor to obtain a calibration measurement value T1;
3) the temperature sensor transmits an original measured value T0 to the signal processing device, the calibration sensor transmits a calibration measured value T1 to the signal processing device, and after data processing, calibration parameters are obtained, wherein the calibration parameters are
Wherein,
ri is a calibration coefficient of the ith position cell on the object to be measured;
li is the distance between the ith position cell and the circle center position cell on the object to be measured;
mi is the detection coefficient of the temperature sensor;
ni is a detection coefficient of the calibration sensor;
t0i is the original measured value of the ith position cell detected by the temperature sensor;
t1i is the calibration measurement value of the ith position cell detected by the calibration sensor;
4) the temperature sensor measures the temperature of the cells within the original measurement range (S0) but outside the calibration measurement range (S2) within the temperature measurement range (S1), and transmits the measurement result to the signal processing device, and the signal processing device calibrates the temperature measurement of the cells within the temperature measurement range (S1) based on the calibration coefficient.
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| CN101646930A (en) * | 2007-03-30 | 2010-02-10 | 丰田自动车株式会社 | Temperature measuring device and temperature measuring method |
| US7725286B2 (en) * | 2007-06-02 | 2010-05-25 | Dräger Safety AG & Co. KGaA | Device and method for measuring the body temperature of a living being |
| CN104364800A (en) * | 2012-03-30 | 2015-02-18 | 前视红外系统股份公司 | Facilitating analysis and interpretation of associated visible light and infrared (IR) image information |
| CN105942987A (en) * | 2016-04-18 | 2016-09-21 | 北京异度矩阵科技有限公司 | Portable infrared thermometer for continuous monitoring and temperature compensation method thereof |
| CN109154977A (en) * | 2016-03-28 | 2019-01-04 | 亚马逊科技公司 | Combined depth and thermal information are to be used for object detection and evacuation |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646930A (en) * | 2007-03-30 | 2010-02-10 | 丰田自动车株式会社 | Temperature measuring device and temperature measuring method |
| US7725286B2 (en) * | 2007-06-02 | 2010-05-25 | Dräger Safety AG & Co. KGaA | Device and method for measuring the body temperature of a living being |
| CN104364800A (en) * | 2012-03-30 | 2015-02-18 | 前视红外系统股份公司 | Facilitating analysis and interpretation of associated visible light and infrared (IR) image information |
| CN109154977A (en) * | 2016-03-28 | 2019-01-04 | 亚马逊科技公司 | Combined depth and thermal information are to be used for object detection and evacuation |
| CN105942987A (en) * | 2016-04-18 | 2016-09-21 | 北京异度矩阵科技有限公司 | Portable infrared thermometer for continuous monitoring and temperature compensation method thereof |
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