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中线制轮廓仪(计)的电信号处理过程方框图见图1(以压电式传感器为例)。由传感器把工件表面粗糙度机械量转化为电荷量,经电荷放大后送带通滤波器。带通滤波器的作用是在低频段限制工件的宏观几何信号及波度信号的进入,在高频段限制高频噪声进入运算部分,它是电信号处理系统中十分重要的环节,如果设计不合理或装配、调试不准确,就会造成一定的测量误差。
The center line profiler (meter) of the electrical signal processing block diagram shown in Figure 1 (with piezoelectric sensors, for example). By the sensor to the surface roughness of the mechanical quantity into charge, the charge amplified by the band-pass filter. The role of the band-pass filter is to limit the workpiece in the low-band macro-geometric signal and the introduction of the wavy signal, high-frequency high-frequency noise limiting part of the operation, it is a very important part of the electrical signal processing system, if the design is not reasonable Or assembly, debugging is not accurate, it will cause some measurement error.