Understand the principle and application of surface roughness instrument

Roughness instrument is also called surface roughness instrument, surface finish instrument, surface roughness detector, roughness measuring instrument, roughness meter, roughness tester and other names. It was first developed and produced abroad and then introduced into China.

Roughness meter measuring the surface roughness of workpieces, put the sensors on the workpiece surface to be tested, by instrument internal drive mechanism drive the sensor do constant speed glide along the surface to be tested, sharp sensor through the built-in stylus feel the roughness of the surface being measured, the roughness of the workpiece surface to be tested at this time cause displacement by the probe, the displacement of the sensor of the inductance coil inductance changes,Thus, an analog signal proportional to the measured surface roughness is generated at the output end of the phase-sensitive rectifier. After amplification and level conversion, the signal enters the data acquisition system.

The application fields of roughness meter are:

First, machine processing manufacturing industry, mainly metal processing manufacturing.Roughness meter was originally produced to test the surface roughness of machined parts.In particular, the stylus roughness measuring instrument is more suitable for the detection of hard metal surface.


Such as: auto parts processing manufacturing, machinery parts processing manufacturing and so on.As long as these processing and manufacturing industries are concerned with the surface quality of the workpiece, the test application of the roughness meter is the best.

Second, non-metal processing manufacturing industry, with the progress and development of science and technology, more and more new materials are applied to the processing technology, such as ceramics, plastics, polyethylene, and so on. Now some bearings are processed with special ceramic materials, and pumps and valves are processed with polyethylene materials.These materials are hard and can be used in some applications as a substitute for metal materials to make workpieces, and their surface roughness needs to be measured during production and processing.

3. With the continuous enhancement and improvement of the technology and function of the roughness meter, as well as the in-depth promotion and application, more and more industries have been found to demand roughness detection. In addition to mechanical processing and manufacturing, electric power, communication, electronics,

Such as: switch coupling, integrated circuit semiconductor and other production and processing process also need to assess the roughness, and even people used in life stationery, tableware, human teeth surface need to use roughness test.

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