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为探索红外热成像技术用于玻璃钢材料厚度测量的方法,文中使用闪光灯脉冲激励热成像的方法对玻璃钢平底洞标准件进行检测,通过脉冲相位法(PPT)进行数据处理,提取频域信息、消除噪声,并在试验设备采样频率不能满足盲频测量要求的限制条件下,建立相位阈值,完成了厚度测量。试验结果表明,玻璃钢试件的物理特性会对测量结果造成误差,但经数值优化后可在一定厚度范围内得到和实际深度接近的探测值,该方法可以作为玻璃钢厚度测量的有效手段。
In order to explore the method of infrared thermography used for the thickness measurement of FRP materials, this paper uses the method of flash pulse excitation thermal imaging to inspect the standard parts of FRP flat-bottomed cavities, processes the data by pulse phase method (PPT), extracts the frequency domain information, Noise, and the test equipment sampling frequency can not meet the blind frequency measurement requirements of the restrictions, the establishment of the phase threshold, the completion of the thickness measurement. The experimental results show that the physical properties of FRP specimens will cause errors to the measurement results. However, the numerical value of the FRP specimens can get the measured value close to the actual depth within a certain thickness range. This method can be used as an effective measure for FRP thickness measurement.