A High Precision Magnetic Based Linear Displacement Sensor

The fast industrial developments result in newly created devices in a wide range of applications. Sensors families are one of the most important instruments in industries which provide various useful facilities in controlling and monitoring applications. Precise displacement sensors are needed in any moving applications. The measurement of the linear displacement in the electromechanical systems is a special issue in industries. Linear displacement measuring not only is needed to provide a suitable control system in various systems but also it is necessary to protect some devices in industrial applications such as turbine and generator shafts. In this paper, a low-cost, robust, non-contact, and high precision linear displacement sensor is proposed. The mechanical structure and electrical circuit are two special parts of the sensor. A load cell works as a transducer which converts the mechanical tension to voltage data set. An industrial setup of the sensor is provided and tested to demonstrate the system accuracy and effectiveness in the linear displacement measurement.