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Infrared thermal imager calibration method based on FPA temperature

A technology of infrared thermal imager and calibration method, which is applied in the direction of radiation pyrometry, instruments, scientific instruments, etc., can solve the problems of high price, and achieve the effects of wide application, accurate calibration, and extended temperature measurement range

Active Publication Date: 2019-03-29
昆山合朗航空科技有限公司
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Problems solved by technology

[0003] The accurate temperature measurement of the existing uncooled infrared thermal cameras completely depends on the sensor manufacturer's private algorithm; therefore, the models that achieve accurate temperature measurement are more expensive

Method used

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  • Infrared thermal imager calibration method based on FPA temperature
  • Infrared thermal imager calibration method based on FPA temperature
  • Infrared thermal imager calibration method based on FPA temperature

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Embodiment Construction

[0044] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] Such as Figure 4 As shown, the present invention provides a kind of infrared camera calibration method based on FPA temperature, comprising:

[0046] Step S1, establishing a multi-segment linear model between the FPA calibration temperature range and the output of the infrared thermal imager at each blackbody temperature;

[0047] Step S2, according to the multi-segment linear model, predict the output of the infrared thermal imager corresponding to each black body temperature outside the FPA calibration temperature range;

[0048] Step S3, correcting the output of the thermal imaging camera in different intervals, eliminating the distortion of the output of the thermal imaging camera introduced when the FPA temperature c...

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Abstract

The invention provides an infrared thermal imager calibration method based on FPA temperature. The infrared thermal imager calibration method provided by the invention comprises the steps that a piecewise linear model of the output of an infrared thermal imager and FPA temperature is established, and the output of the infrared thermal imager outside a calibrated FPA temperature interval is predicted; the FPA temperature range is divided into several cells; in each cell, FPA temperature and the output of the infrared thermal imager are established; and an output model is corrected; in each interval section, the output of the infrared thermal imager is corrected, and the output distortion, which is caused by the FPA temperature change, of the thermal imager is eliminated; and finally, the model of the corrected output of the temperature and the infrared thermal imager is established piecewise to realize temperature measurement of the infrared thermal imager. According to the invention, FPA temperature compensation is carried out outside a sensor when a sensor manufacturer does not support temperature measurement, and accurate temperature measurement is realized.

Description

technical field [0001] The invention relates to a method for calibrating an infrared thermal imager based on FPA temperature. Background technique [0002] The infrared thermal imaging camera uses the infrared detector and the optical imaging objective lens to receive the infrared radiation energy of the external target, and obtains the infrared thermal image through the photosensitive element of the infrared detector. The thermal image reflects the heat distribution field of the measured target plane, therefore, Infrared thermal imaging cameras can be used to measure the temperature of objects, and this temperature measurement is non-contact, and it is widely used in fire protection, electric power, and fault diagnosis industries. [0003] The accurate temperature measurement of the existing uncooled infrared thermal cameras depends entirely on the sensor manufacturer's proprietary algorithm; therefore, the models that achieve accurate temperature measurement are relatively...

Claims

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Application Information

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IPC IPC(8): G01J5/00
CPCG01J5/00G01J5/80
Inventor 杨军伟
Owner 昆山合朗航空科技有限公司
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