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目的:为提高挠度测量的准确性，研究基于标尺标定法的光电挠度仪及其影响因素。方法:采用标尺标定法。通过安装已知尺寸的标尺，利用工业相机成像获取标尺对应的像素尺寸，计算标定系数；选定标靶，通过图像处理计算像素位移，获得实际挠度值。实验分析了挠度变化速度、相机安装角度、环境光照度等因素对光电挠度仪测量结果的影响。结果:实验结果表明，在实验参数变化范围内(2.5～10 mm/s、400～2 200 lx、仰角范围2°～14°、水平角范围2°～14°),挠度变化速度、环境光照度、相机安装角度等因素对挠度测量结果无显著影响，光电挠度仪的测量值与高精度位移传感器数据基本一致，偏差在0.1 mm以内。结论:基于标尺标定法的光电挠度仪准确度高，受外界因素影响小，具有很高的实际应用价值。
Abstract：Aims: This paper aims to study the photoelectric deflectometer based on the scale calibration method and its influencing factors to improve the accuracy of deflection measurement. Methods: By installing a scale of known size, the number of pixels corresponding to the scale was obtained by imaging with an industrial camera. The calibration coefficient was calculated; then the actual deflection value was calculated by selecting the target for image processing. The main factors affecting the measurement results of the photoelectric deflectometer, such as the deflection change speed, the camera angle, and the ambient illumination, were analysed. Results: The experimental results showed that within the experimental variation range(2.5 to 10 mm/s, 400 to 2 200 lx, elevation angle range 2° to 14°, horizontal angle range 2° to 14°), factors such as the deflection change rate, the ambient illuminance, and the camera installation angle had no significant impact on the deflection measurement results. The measurement values of the photoelectric deflection meter were basically consistent with those of the high-precision displacement sensor, with a deviation within 0.1 mm. Conclusions: The photoelectric deflectometer based on the scale calibration method has highly accurate and little infcuence by external factors with high practical application value.
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基本信息:
DOI：
中图分类号:TH70
引用信息:
[1]王欣荣,龚华平,于子淇,等.基于标尺标定法的光电挠度仪及其影响因素研究[J].中国计量大学学报,2025,36(02):178-185.
基金信息:
国家重点研发计划项目(No.2020YFF0217803)