A Temperature Compensation and Calibration Method for Thermal Infrared Array Sensor
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摘要:
针对远红外矩阵式温度传感器提出一种可显著提高温度测量精度的补偿及校准方法，该方法建立了基于矩阵式红外阵列温度检测的最值补偿模型，并提出一种距离归一化校准方法，利用该温度补偿及校准方法可对矩阵式红外温度传感器在任意角度，任意距离下的测量误差进行补偿和校准。实验结果表明，该方法能够减少测量角度及距离对温度测量的影响，显著提高矩阵式红外温度传感器的测量精度，并具备实用价值。
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关键词:
- 红外矩阵式感温传感器 /
- 角度补偿 /
- 距离补偿 /
- 距离校准 /
- 距离归一化
Abstract:A temperature compensation and calibration method of the thermal infrared radiometer array sensor were introduced to improve the measurement accuracy. A maximum temperature calibration model were established based on the matrix IR temperature sensor, and a distance uniform method were introduced in this paper. By using the method, measurement error can be calibrated without the limitation of the angle and distance of the IR array sensor. Test results showed that this method can reduce the influences of the angle or distance of the measurement, and improve the accuracy.
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图 3 不同温度下水平方向补偿后曲线
Figure 3. Compensation curves in horizontal axis of different temperature
表 1 水平x方向补偿数据汇总
Table 1 Compensation on horizontal direction
Column index Sensor 1 Sensor 2 Sensor 3 Avg. Avg. Comp. Avg. Comp. Avg. Comp. 2 80.917 1.165 81.547 1.159 80.464 1.184 1.161 4 84.217 1.119 85.353 1.107 83.725 1.137 1.119 6 87.823 1.073 87.723 1.077 87.422 1.089 1.080 8 89.250 1.056 89.550 1.055 89.652 1.062 1.058 9 91.997 1.025 90.147 1.048 92.263 1.032 1.036 11 92.330 1.021 91.477 1.033 93.592 1.018 1.022 13 94.017 1.003 94.067 1.004 95.093 1.001 1.004 16 94.267 1.000 94.473 1.000 95.229 1.000 1.000 17 94.267 1.000 94.317 1.000 95.225 1.000 1.000 20 93.187 1.012 93.660 1.007 94.876 1.004 1.007 22 93.053 1.013 92.993 1.014 93.815 1.015 1.017 24 90.920 1.037 90.650 1.040 91.763 1.038 1.039 25 89.870 1.049 90.190 1.046 90.162 1.056 1.049 27 86.167 1.094 87.390 1.079 87.612 1.087 1.081 29 84.783 1.112 85.347 1.105 85.603 1.112 1.105 31 79.800 1.181 81.057 1.164 80.881 1.177 1.164 
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表 2 不同距离补偿值
Table 2 Compensation of different distances
de Φ10 cm 40 cm×60 cm 80 cm×120cm Avg. c(d) d1 Avg. c(d) d2 Avg. c(d) 2.5 84.82 0.92 10.00 85.68 0.91 20.00 80.67 0.92 5.0 83.947 0.93 20.00 84.62 0.92 40.00 79.88 0.92 7.5 83.06 0.94 30.00 83.54 0.94 60.00 79.20 0.93 10.0 82.22 0.95 40.00 82.70 0.94 80.00 78.27 0.94 15.0 80.81 0.96 60.00 81.29 0.96 120.00 77.13 0.96 20.0 80.01 0.97 80.00 80.03 0.98 160.00 75.86 0.97 25.0 79.42 0.98 100.00 79.60 0.98 200.00 75.39 0.98 30.0 78.92 0.99 120.00 78.98 0.99 240.00 75.09 0.98 35.0 78.53 0.99 140.00 78.46 1.00 280.00 74.02 1.00 40.0 77.90 1.00 160.00 78.08 1.00 320.00 73.81 1.00
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表 3 实验验证数据
Table 3 Test of different distances and angles with compensation
H/cm d/cm de/cm x y T0/℃ e0% Tr/℃ er% Tl/℃ Φ10 cm 30 30 8 31 85.1 -13.2 99.0 0.99 98 30 30 21 10 90.6 -7.5 97.0 -1.03 98 40 40 4 24 85.9 -9.6 96.2 1.24 95 40 40 4 6 82.1 -13.6 95.2 0.26 95 40 cm×60 cm 80 20 10 5 84.5 -6.2 89.9 -0.15 90 80 20 20 28 83.8 -6.9 91.3 1.45 90 100 25 15 9 95.5 -2.6 97.9 -0.12 98 100 25 7 29 88.7 -9.5 99.3 1.30 98 80 cm×120 cm 240 30 19 8 73.1 -8.7 81.3 1.60 80 240 30 7 27 71.2 -11.0 81.4 1.72 80 160 20 6 19 91.7 -6.5 95.7 -2.35 98 160 20 19 21 91.8 -6.3 95.6 -2.42 98
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