Development of magnetostrictive displacement sensor
The displacement is the amount related to the movement of the position of the object during the movement, and the range of measurement of the displacement is quite extensive. Small displacements are usually detected by strain gauge, inductive, differential transformer, eddy current, and Hall sensors. Large displacements are commonly measured by sensing technologies such as inductosyn, grating, capacitive grid, and magnetic grid. Displacement sensors, also known as linear sensors, function to convert various measured physical quantities into electrical quantities. In the production process, the measurement of displacement is generally divided into two types: physical size measurement and mechanical displacement. According to the output signal, the displacement sensor can be divided into analog and digital.
With the rapid development of information technology social science and technology, especially the continuous application of new materials and new technologies, the principle and method of displacement measurement are continuously developed, updated and improved. At the same time, production applications are placing increasing demands on displacement measurements. For example, in the process of high-precision motion control, it is necessary to meet the requirements of high precision, large scale and low cost at the same time. Conventional pull-type, capacitive, inductive, grating and other displacement sensors can not meet the measurement requirements. The introduction of the magnetostrictive principle has solved this problem well. Compared with the traditional sensor, the magnetostrictive displacement sensor has the advantages of high precision, large range, high safety, high reliability, easy installation and maintenance.
