Inductive sensor classification and application

The inductive sensor uses electromagnetic induction to convert the measured physical quantities such as displacement, pressure, flow, vibration, etc. into the change of the self-inductance coefficient and mutual inductance coefficient of the coil, and then converts it into the voltage or current change output by the circuit to realize non-electrical conversion to electricity. The inductive sensor uses electromagnetic induction to convert the measured physical quantities such as displacement, pressure, flow, vibration, etc. into the change of the self-inductance coefficient and mutual inductance coefficient of the coil, and then converts it into the voltage or current change output by the circuit to realize non-electrical conversion to electricity. It is divided into the following three types: (1) Variable reluctance sensor - self-inductive type (2) Differential transformer type sensor - mutual inductance type (3) Eddy current sensor - Application of eddy current inductive sensor inductive type The sensor has the outstanding advantages of simple structure, fast dynamic response, easy non-contact measurement, etc. It is especially suitable for acids, alkalis, chlorides, organic solvents, liquid CO2, ammonia water, PVC powder, ash, oil-water interface, etc. Liquid level measurement is currently widely used in metallurgy, petroleum, chemical, coal, cement, grain and other industries. 1. The attenuation of detection distance. The slide is made of iron, which is suitable for inductive sensor detection; while the size of the measured part of the slide is slightly smaller than the size of the standard test object (the standard test object size is 3 times the rated detection distance, in this application, the standard size should be 120*120mm ), in this case there will be a certain attenuation. 2. On-site anti-interference ability. This is a problem that cannot be ignored. Ordinary inductive sensors are easily interfered by motors or inverters. Many technicians only choose sensors with strong anti-electromagnetic interference for applications in the vicinity. However, in the automobile manufacturing workshop, the workshop is large, and the on-site technicians are accustomed to using the walkie-talkie to communicate, especially when talking with the walkie-talkie while walking, they will inadvertently approach the sensor, resulting in a short-term failure. 3. Installation. With the popularization of inductive sensors, (liquid level gauges, liquid level transmitters, capacitive liquid level gauges, level switches, capacitive liquid level transmitters, level switches, etc.) sensors are not only in terms of electrical performance It has been improved, and its mechanical design has become more and more user-friendly. To the greatest extent possible to achieve user-friendly installation. It reduces the stocking of a variety of similar products and reduces the time for installation and maintenance. 4. Guarantee of stable operation. In the use of the depot, it is necessary to prevent any erosion of oil and dust. In addition, when the slippage passes through the track, the vibration exists for a long time, and the excellent vibration resistance also plays a very important role.
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