Temperature correction method for infrared temperature measurement, and infrared thermal imager

An infrared thermal imager and infrared thermometer technology, which is applied in radiation pyrometry, instruments, measuring devices, etc., can solve the problem of large temperature gaps, cost control of infrared temperature measurement technology, and temperature measurement accuracy. Problems such as measuring the real temperature of the object

Pending Publication Date: 2020-06-30
广州尚衡信息科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is to use the temperature sensor installed next to the infrared thermometer to correct the measurement results of the infrared thermometer. The temperature sensor obtains a temperature value close to the ambient temperature, which is far from the body temperature of the human body. In addition, the

Method used

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  • Temperature correction method for infrared temperature measurement, and infrared thermal imager
  • Temperature correction method for infrared temperature measurement, and infrared thermal imager
  • Temperature correction method for infrared temperature measurement, and infrared thermal imager

Examples

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Effect test

Embodiment 1

[0050] This embodiment provides a temperature correction method for infrared temperature measurement, which is suitable for scenes where the position of the measured object changes with time relative to the infrared thermometer, such as an infrared thermal imaging device installed at the entrance of a public place. An infrared thermometer is installed in the device.

[0051] For the temperature correction method of the infrared temperature measurement, refer to figure 1 , including the following steps:

[0052] Arrange infrared thermal imaging devices and black bodies in the laboratory, distribute and set N black bodies within the temperature measurement range of the infrared thermometer, N is a natural number greater than or equal to 2; set the temperature of N black bodies to the same value .

[0053] 1) To obtain the correction parameters, the steps are:

[0054] 1.1) Obtain the distance between N black bodies and the infrared thermometer: the distance S between the blac...

Embodiment 2

[0077] This embodiment provides a temperature correction method for infrared temperature measurement, including the following steps:

[0078] An infrared thermometer and a blackbody are installed in the environment of the measured object, and the blackbody 1 is moved within the temperature measurement range of the infrared thermometer. Specifically, such as Figure 4 As shown, the black body 1 is placed at a distance L from the infrared thermometer 2, and then the black body 1 is moved to a distance in turn, and each time the distance L is moved, each position of the black body 1 is guaranteed when moving. It is on the same straight line as the infrared thermometer 2. The distance S between the blackbody at different positions and the infrared thermometer n ,n are equal to 1,2,...N,S respectively n = nL.

[0079] 1) To obtain the correction parameters, the steps are:

[0080] 1.1) Obtain the distance between the black body 1 at N different positions and the infrared therm...

Embodiment 3

[0090] This implementation case provides an infrared thermometer, including

[0091] Infrared Thermometer;

[0092] A positioning unit, the positioning unit is used to measure the position vector between the measured object and the infrared thermometer;

[0093] A calculation unit, the calculation unit measures the position vector between the measured object and the infrared thermal imager through the positioning unit, and the temperature of the measured object measured by the infrared thermal imager, and executes the infrared measurement Warm temperature correction method.

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Abstract

The invention discloses a temperature correction method for infrared temperature measurement, and an infrared thermal imager. The method completes the temperature correction through the following steps: obtaining the position vectors between N black bodies at different positions and an infrared thermometer, improving the correction precision through the black bodies at different positions, and providing a data source for the temperature correction; then, respectively measuring the temperatures of the black bodies by using a contact type temperature measuring sensor and the infrared thermometer, calculating the relative temperature differences of the black bodies, and based on the temperature differences and the spatial relationship between the black bodies and the infrared thermometer, incombination with preset parameters of the external environment such as temperature, humidity, wind speed, illumination conditions and the like, using a mathematical analysis technology to obtain correction parameters, and correcting the temperature measurement value of a measured object to complete temperature correction of the infrared thermometer. The high-precision constant-temperature controlof the black bodies is converted into real-time accurate monitoring of the temperature of the black bodies, so that the calibration cost is effectively controlled, and the temperature measurement accuracy is ensured.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement using infrared radiation, in particular to a temperature correction method for infrared temperature measurement and an infrared thermal imager. Background technique [0002] Infrared thermal imaging thermometer has a large number of applications in industrial temperature measurement, human body temperature measurement and other scenarios due to its characteristics of non-contact, long temperature measurement distance, multi-point simultaneous temperature measurement, and high temperature measurement efficiency. [0003] In actual use, the accuracy of temperature measurement by infrared thermometers is greatly affected by the environment, especially outdoors, where the temperature measurement error is large, and the ambient temperature, measurement distance, occlusion, surface emissivity, surrounding heat sources, etc. are all errors in temperature measurement influencing factors. ...

Claims

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Application Information

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IPC IPC(8): G01J5/00G01J5/06G01J5/52
CPCG01J5/00G01J5/06G01J2005/0077G01J5/064G01J5/80G01J5/53
Inventor 李伟干严瑾
Owner 广州尚衡信息科技有限公司
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