Principle of magnetostrictive displacement sensor

Lead: Today Bunny introduces magnetostrictive displacement sensor to everyone. Not many friends know about magnetostrictive sensors. In fact, it is a widely used tactile sensor. Widely used in magnetostrictive liquid level gauge and refueling, magnetostrictive sensor is often used to measure displacement. It is the magnetostrictive displacement sensor that Tutu told you today. Next, I'll tell you about the magnetostrictive displacement sensor.

First, the working principle of magnetostrictive displacement sensor

Magnetostrictive displacement (liquid level) sensor uses magnetostrictive principle to generate a strain pulse signal through the intersection of two different magnetic fields to accurately measure the position. The measuring element is a waveguide, and the sensitive element in the waveguide is made of special magnetostrictive material.

The measurement process is to generate a current pulse in the electronic chamber of the sensor and transmit it in the waveguide, thus generating a circumferential magnetic field outside the waveguide. When the magnetic field changes with the position and intersects with the magnetic field generated by the moving magnetic ring sheathed on the waveguide, due to the magnetostrictive effect. A strain mechanical wave pulse signal will be generated in the waveguide. This kind of strain mechanical wave pulse signal will propagate at a fixed sound speed and will be detected by the electronic room soon.

Because the transmission time of this strain mechanical wave pulse signal in the waveguide is proportional to the distance between the movable magnetic ring and the electronic chamber, the distance can be determined with high accuracy by measuring the time. Since the output signal is a true absolute value, it is not a proportional or amplified signal. Therefore, there is no signal drift or numerical change, and there is no need for periodic re-labeling.

Second, the application of magnetostrictive displacement sensor

With the continuous improvement of domestic wind turbine manufacturing level, hydraulic pitch control system will be widely used for its advantages of performance, environmental adaptability and maintenance cost. In the aspect of mechanical disc brake locking pin, the application of magnetostrictive linear displacement sensor significantly improves the reliability of locking pin action, and then improves the safety of the whole machine operation.

Displacement sensor is used to monitor whether the action of locking pin is reliable in place, so most mechanical disc brake systems need to be equipped with position sensor.

The above knowledge about the working principle of magnetostrictive displacement sensor is introduced in detail I believe that everyone has a relevant understanding of the principle of magnetostrictive displacement sensor. In fact, the magnetostrictive displacement sensor has good performance and high cost performance, and can carry out various output modes. The service life of the magnetostrictive displacement sensor is also relatively long. The introduction of magnetostrictive displacement sensor is here.

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