Inductance type transducer Inductance type sensor uses electromagnetic induction to convert measured physical quantities such as displacement, pressure, flow, vibration, etc. into coil self-inductance coefficient and mutual inductance coefficient, and then converts the circuit into voltage or current change. The output is output to achieve non-electricity to power conversion. Divided into the following three types:
(1) Variable Reluctance Sensor - Self-Inductive
(2) Differential transformer type sensor - mutual inductance
(3) Eddy current sensor - eddy current type
application
Inductive sensors have the advantages of simple structure, fast dynamic response, easy to achieve non-contact measurement, etc., especially suitable for acids, alkalis, chlorides, organic solvents, liquid CO2, ammonia, PVC powder, ash, oil and water. Interface level measurement, currently used in metallurgy, petroleum, chemical, coal, cement, food and other industries.
1. Detect the attenuation of the distance . Sliding is iron, suitable for inductive sensor detection; while the size of the tested part is slightly smaller than the standard test object size (the standard measured 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. Anti-interference ability on site. This is a problem that cannot be ignored. Ordinary inductive sensors are easily interfered by motors or inverters. Many technicians only select sensors that are highly resistant to electromagnetic interference for applications in the vicinity. However, in the automobile manufacturing workshop, the factory building 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 aspects. With the popularity of inductive sensors, sensors are not only improved in electrical performance, but their mechanical design is becoming more and more human. To achieve the most humanized installation. Reduces the stocking of multiple approximate products and reduces the time for installation and maintenance.
4. Guarantee of stable operation. In the use of the car factory, it is necessary to prevent any oil and dust from eroding. In addition, when the slider passes through the track, the vibration is long-lived, and the excellent vibration resistance also plays a very important role.
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