Detector gain adjustment method applied to infrared thermal imager

Abstract

The application provides a detector gain adjustment method applied to an infrared thermal imager, and comprises the following steps: (A1) setting a detector gain parameter of the infrared thermal imager as a reference value; (A2) using a black body for calibrating temperature T0 to obtain a gray value A by using the infrared thermal imager with the adjusted gain parameter; using a black body for calibrating temperature T1 to obtain a gray value B by using the infrared thermal imager, wherein T1>T0; (A3) classifying according to the gray values A and B, adjusting the detector gain parameter, and entering step (A2) until the gray values A and B meet the requirements, and outputting the gain parameters F, INT and S at this time. The application has the advantages of automatic operation, small error and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to an infrared thermal imager, in particular to a detector gain adjustment method applied to an infrared thermal imager. BACKGROUND

[0002] In the calibration process of the thermal imager, the detector gain parameters F, INT and S need to be adjusted.

[0003] The existing methods are all manually adjusted by experience, and the detector gain related parameters are manually adjusted until the gray value falls within the target range when the thermal imager faces two calibration blackbodies. This operation has many deficiencies, such as:

[0004] The operation is different for different people, and the manual operation error is large and the efficiency is low. SUMMARY

[0005] To solve the deficiencies in the prior art, the present application provides a detector gain adjustment method applied to an infrared thermal imager.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] The detector gain adjustment method applied to an infrared thermal imager comprises the following steps:

[0008] (A1) setting the detector gain parameters of the infrared thermal imager to the reference value;

[0009] (A2) using the infrared thermal imager with adjusted gain parameters to aim at the calibration blackbody at temperature T0 to obtain the gray value A;

[0010] Using the infrared thermal imager to aim at the calibration blackbody at temperature T1 to obtain the gray value B, T1>T0;

[0011] (A3) classifying according to the gray values A and B;

[0012] If A>B and B>A+R, enter step (B1); If A>B and B>A+R, enter step (C1); If A>B and B>A+R, enter step (D1);

[0013] If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R; If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R; If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R;

[0014] If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R; If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R; If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R;

[0015] If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R; If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R; If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R; If A>B and B>A+R, enter step (E1); parameter R∈[1,10], the higher the required accuracy, the smaller R;

[0016] If the above condition is not met, the gray scale values A and B are within the normal range, and the gain parameters F, INT and S of the detector at this time are outputted;

[0017] (B1) performing a loop, k1 is the change of the detector output gray scale value when the gain parameter F is adjusted by 1, and the gain parameter F of the infrared thermal imager is adjusted to the gain parameter F i+1 , and step (A2) is entered;

[0018] (C1) performing a loop, k2 is the change of the detector output gray scale value when the gain parameter INT is adjusted by 1, and the gain parameter INT of the infrared thermal imager is adjusted to the gain parameter INT i+1 , and step (A2) is entered, the gray scale values A and B are obtained, and the gain parameter is calculated using the gray scale values A and B;

[0019] Step (A2) is entered; k3 is the change of the detector output gray scale value when the gain parameter S is adjusted by 1.

[0020] (D1) performing a loop, k1 is the change of the detector output gray scale value when the gain parameter F is adjusted by 1, and the gain parameter F of the infrared thermal imager is adjusted to the gain parameter F i+1 , and step (A2) is entered;

[0021] (E1) performing a loop, k2 is the change of the detector output gray scale value when the gain parameter INT is adjusted by 1, and the gain parameter INT of the infrared thermal imager is adjusted to the gain parameter INT i+1 , and step (A2) is entered, the gray scale values A and B are obtained, and the gain parameter is calculated using the gray scale values A and B;

[0022] Step (A2) is entered; k3 is the change of the detector output gray scale value when the gain parameter S is adjusted by 1.

[0023] Compared with the prior art, the present application has the beneficial effects that:

[0024] The present application adopts automatic adjustment, improves the consistency of operation, avoids the influence caused by human operation, and has small adjustment error and high efficiency. DETAILED DESCRIPTION

[0025] The following description describes optional embodiments of the present application to teach those skilled in the art how to implement and reproduce the present application. Some conventional aspects have been simplified or omitted for the sake of teaching the present application. Those skilled in the art should understand that variations or substitutions from these embodiments will be within the scope of the present application. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the present application. Thus, the present application is not limited to the following optional embodiments, but is only defined by the claims and their equivalents.

[0026] Embodiment:

[0027] The detector gain adjustment method applied to an infrared thermal imager comprises the following steps:

[0028] (A1) setting the detector gain parameter of the infrared thermal imager to a reference value;

[0029] (A2) using the infrared thermal imager with the adjusted gain parameter to align with a blackbody for calibration at temperature T0, obtaining a gray value A;

[0030] using the infrared thermal imager to align with a blackbody for calibration at temperature T1, obtaining a gray value B, T1>T0;

[0031] (A3) classifying according to the gray values A, B;

[0032] if and entering step (B1);

[0033] if and entering step (C1);

[0034] if and entering step (D1);

[0035] if and entering step (E1); the parameter R∈[1, 10], the higher the required accuracy, the smaller R;

[0036] if none of the above, the gray values A, B are within the normal range, outputting the gain parameters F, INT and S of the detector at this time, and adjusting the gain parameter of the infrared thermal imager to this;

[0037] (B1) performing a loop, k1 is the change in the gray value output by the detector when the gain parameter F is adjusted by 1, and the gain parameter of the infrared thermal imager is adjusted to the gain parameter F i+1 , entering step (A2);

[0038] (C1) execute a loop, k2 is the change in the output gray value of the detector per 1 adjustment of the gain parameter INT, and the gain parameter of the infrared thermal imager is adjusted to the gain parameter INT i+1 , and step (A2) is entered to obtain the gray values A and B, and the gain parameter is calculated using the gray values A and B;

[0039] Step (A2) is entered; k3 is the change in the output gray value of the detector per 1 adjustment of the gain parameter S;

[0040] (D1) execute a loop, k1 is the change in the output gray value of the detector per 1 adjustment of the gain parameter F, and the gain parameter of the infrared thermal imager is adjusted to the gain parameter F i+1 , and step (A2) is entered;

[0041] (E1) execute a loop, k2 is the change in the output gray value of the detector per 1 adjustment of the gain parameter INT, and the gain parameter of the infrared thermal imager is adjusted to the gain parameter INT i+1 , and step (A2) is entered to obtain the gray values A and B, and the gain parameter is calculated using the gray values A and B;

[0042] Step (A2) is entered; k3 is the change in the output gray value of the detector per 1 adjustment of the gain parameter S.

Claims

1. A detector gain adjustment method for an infrared thermal imager, the detector gain adjustment method for an infrared thermal imager comprising the following steps: (A1) Set the detector gain parameter of the infrared thermal imager to the baseline value; (A2) Using an infrared thermal imager with adjusted gain parameters, aiming at a calibration blackbody at temperature T0, the grayscale value A is obtained; Use the infrared thermal imager to align with the calibration blackbody at temperature T1 to obtain a grayscale value B, T1>T0; (A3) classifying according to the grayscale values ​​A and B; like and Go to step (B1); like and Go to step (C1); like and Go to step (D1); like and Go to step (E1); parameter R∈[1,10]. The higher the required accuracy, the smaller R. In the absence of the above situation, the grayscale values ​​A and B are within the normal range, and the detector gain parameters F, INT and S are output at this time; (B1) Execute the loop, k1 is the change in the detector output grayscale value when the gain parameter F is adjusted by 1. The gain parameter of the infrared thermal imager is adjusted to the gain parameter F. i+1 , proceed to step (A2); (C1) execute the loop, k2 is the change in the grayscale value of the detector output when the gain parameter INT is adjusted by 1. The gain parameter of the infrared thermal imager is adjusted to the gain parameter INT i+1 , proceed to step (A2), obtain grayscale values ​​A and B, and use the grayscale values ​​A and B to calculate the gain parameter; Go to step (A2); k3 is the change in the detector output grayscale value for every adjustment of the gain parameter S by 1; (D1) executes the loop, k1 is the change in the detector output grayscale value when the gain parameter F is adjusted by 1. The gain parameter of the infrared thermal imager is adjusted to the gain parameter F. i+1 , proceed to step (A2); (E1) Execute the loop, k2 is the change in the grayscale value of the detector output when the gain parameter INT is adjusted by 1. The gain parameter of the infrared thermal imager is adjusted to the gain parameter INT i+1 , proceed to step (A2), obtain grayscale values ​​A and B, and use the grayscale values ​​A and B to calculate the gain parameter; Go to step (A2); k3 is the change in the detector output grayscale value when the gain parameter S is adjusted by 1.

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