Approximate engineering method for detection of magneto-resistive proximity sensor

By non-contacting measurement, the inductive proximity sensor overcomes disadvantages such as short service life and unreliability of position detection components like micro-switch. And high environmental resistance of magneto-resistive proximity sensor is realized by using wholly-metallic sealing housing. Because the coil loop resistance is easily affected by ambient temperature while the coil inductance of inductive proximity sensor is generally not affected by it, an algorithm to calculate the coil inductance is proposed. For ease of engineering, the design of inductive proximity sensor unaffected by ambient temperature is realized by approximate calculation and error estimation. The actual test shows that this solution has better temperature adaptability and engineering conditions than the traditional one.