Design of Large-Stroke Linear Displacement Sensor with High-Precision Based on SS495A1 Technology

摘要

Design of large-stroke linear displacement sensor with high-precision based on SS495A1 technology uses permanent magnet as the excitation source and a series of linear Hall devices as the sensing element. Having been encoded, linear Hall device output signal enters into DSPIC30F3011 A/D conversion to do conversion, and obtains the absolute displacement value after DSPIC30F3011 calculating, and then transmits to the host computer via RS485 to achieve the non-contact, absolute measurement of the linear displacement. The sensor shell and seal have special materials and special processes so that it can function stably under water, especially in the marine environment.