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1、Displacement Sensors,Members: Wei Gao Wenjing Ning Wanfeng Li Qian Zhang,1. Introduction 2. The categories of displacement sensors 3. The illustrate of displacement sensors 4. Sensor market prospects,Contents,1.Introduction,Displacement sensor is also known as linear sensor, it is a linear device be
2、longs to the metal induction. Sensor is used to convert various measured quantities to electricity.,2. The categories of displacement sensors,according to the motion method Linear displacement sensor Angular displacement sensor according to classified material Metal film sensors, conductive plastic
3、sensors, photoelectric sensors, magnetic sensors, metal glass uranium sensor, the sensor winding.,inductive displacement sensor capacitive displacement sensors optical displacement sensor Hall-type displacement sensor.,3. The illustrate of displacement sensors,inductive displacement sensors,Inductiv
4、e displacement sensor is a metal sensor is a linear device.,Principle of inductive displacement sensors,the air-gap type,the section type,the spiral tube type,the principle diagram of the self inductance type sensor,capacitive displacement sensors,Capacitive displacement sensor is a kind of non-cont
5、act capacitance of the principle of precision measuring instruments.,Principle of capacitive displacement sensors,S plate relative area covered； d the distance between the plates； rrelative dielectric constant； 0permittivity of vacuum； the dielectric constant of medium between capacitor plates。,capa
6、citive differential pressure sensors,Simple structure, high sensitivity, fast response speed (about 100 ms) To measure tiny differential pressure (0 0.75 Pa), vacuum or tiny absolute pressure Should be put on one side of the diaphragm seal and high pumped into vacuum (10-5 pa),capacitance accelerati
7、on sensors,1、5 fixed plate 2body case 3leaf spring 4 mass block 6 nonconductor,high precision, wide frequency response range, large range, high acceleration can be measured,optical displacement sensors,Optical displacement sensor is based on the number of the measured object to block the flux measur
8、ement object displacement or geometry. Characterized by a non-contact measurement, and continuous measurements.,hall-type displacement sensors,Hall displacement sensor measuring principle is to maintain its Hall component (see semiconductor magnetic components) of the excitation current constant, an
9、d make it in a uniform magnetic field gradient to move, then move the displacement is proportional to the output of the Hall Potential.,4.Sensor market prospects,Development of new technologies will redefine the future of the sensor market, such as wireless sensors, fiber optic sensors, smart sensors and metal oxide sensors and the emergence of new sensors to expand market share.,Thank you,