String vibration measurement system based on PSD

摘要

Equipment monitoring, fault diagnosis, and noisiness analysis and eliminating and so on industrial production processes can't do without vibration measurement, this paper compose a vibration test system with the laser - string - PSD sensor and the corresponding signal processing electric circuit. PSD is one optics semiconductor sensor, can output the different size electric current according to the luminous spot in its different superficial position, fast locate with precision to the luminous spot position, carry on experiment to PSD sensor in different vibration source and frequency, obtained vibration waveform of the luminous spot on PSD photosurface, calculates each kind of vibration parameter about vibration source, such as vibration frequency and amplitude, experimental result is in accordance with the actual parameter, verifies PSD not only to have own good qualities in the position measurement, but also have the unique superiority in the vibration measurement.