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Principle of use of surface roughness meter
Jan 09, 2019

Principle of use of surface roughness meter


The following small series to introduce the use of surface roughness meter


When measuring the surface roughness of the workpiece, the surface roughness meter firstly places the sensor on the surface to be measured, and then starts the instrument for measurement. The precision driving mechanism inside the instrument drives the sensor to slide along the surface to be measured at a constant speed, the sensor The roughness of the surface to be tested is felt by the built-in sharp stylus. At this time, the roughness of the surface to be measured of the workpiece causes the stylus to be displaced. This displacement changes the inductance of the sensor coil and thus the output of the phase sensitive detector. The end generates an analog signal proportional to the surface roughness of the measured surface. After the signal is amplified and level-converted, the signal enters the data acquisition system. The DSP chip performs digital filtering and parameter calculation on the collected data, and the measurement result is given on the display. It can be output on the printer and can also communicate with a PC.


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