Object Displacement Measurement System Based on One-Dimensional Position Sensitive Detector and Rotating Laser

This paper presents an object displacement measurement system based on a one-dimensional position-sensitive detector (PSD) and a rotating laser. The system uses the plane formed by the rotating laser as a reference. A one-dimensional PSD mounted on the object captures the laser signal, outputting two signals containing displacement information. These signals are amplified and sent to a microcontroller for parallel ADC conversion and data filtering. Finally, the data is transmitted to a computer via USART communication for further processing to obtain displacement information. Experimental results show that the displacement measurement system offers good measurement accuracy and can be applied in fields such as industrial measurement.