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Point-by-point pixel error calibration method for infrared module

An error calibration and module technology, applied in the field of temperature measurement, can solve the problems of not being able to greatly improve the accuracy of temperature measurement, and not realizing the effective use of pixels on the array, and achieve the effect of improving environmental adaptability and temperature measurement accuracy.

Inactive Publication Date: 2021-08-13
河北高达智能装备股份有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method neither realizes the effective utilization of pixels on the team array nor greatly improves the accuracy of temperature measurement.

Method used

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  • Point-by-point pixel error calibration method for infrared module
  • Point-by-point pixel error calibration method for infrared module
  • Point-by-point pixel error calibration method for infrared module

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Embodiment Construction

[0020] Below, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0021] A point-by-point pixel error calibration method for infrared modules, comprising the following steps:

[0022] Step 1, fix the infrared module with a resolution of n×m on the high-precision pan / tilt, where n≥1, m≥1;

[0023] Step 2, place a constant temperature source with a temperature T in front of the infrared module, and detect the constant temperature source through the infrared module, wherein, 20°C≤T≤35°C;

[0024] Step 3: Rotate the platform to make the constant temperature source image at each pixel position on the focal plane array detector of the infrared module, and record the temperature t(x, y) at the pixel position (x, y) to obtain the temperature matrix A;

[0025]

[0026] In the formula, 1≤x≤m, 1≤y≤n;

[0027] Step 4, calculate the temperature deviation Δt(x, y)=T-t(x, y), output temperature deviation matrix A ...

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Abstract

The invention discloses a point-by-point pixel error calibration method for an infrared module, and belongs to the technical field of temperature measurement. According to the method, an infrared module with the resolution of n*m is adopted to detect a constant-temperature source with the temperature of T; each pixel position of the infrared module detects the constant temperature source and records the temperature, and then the temperature deviation of each pixel position is calculated and stored. According to the invention, the accuracy and stability of temperature measurement of the infrared imaging human body surface temperature measurement system are improved.

Description

technical field [0001] The invention relates to the technical field of temperature measurement, in particular to a point-by-point pixel error calibration method for infrared modules. Background technique [0002] The infrared imaging module is the main device of the infrared imaging temperature measurement system, and its core component is called the focal plane array (FPA), which is similar to a CCD / CMOS chip. When sampling, one micro-scene element corresponds to one pixel on the array. Infrared focal plane array detectors integrate the incoming infrared energy and convert it into an electrical signal for use by the controller. At present, due to the influence of many aspects such as manufacturing process, use environment, module lens, and focal length adjustment, even for a background with uniform temperature, the output signals generated by all pixels in the focal plane background are inconsistent, that is, the non-uniformity of infrared focal plane array devices. Unifo...

Claims

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Application Information

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IPC IPC(8): G01J5/00
CPCG01J5/00G01J2005/0077G01J5/80
Inventor 王力飞靳闪闪葛同府王彦勋张振江马广存边文广杜云东王常涛
Owner 河北高达智能装备股份有限公司