What are the working principles of magnetostrictive displacement sensors?

The magnetostrictive displacement sensor usually uses the working principle of magnetostriction and forms a strain pulse signal with the cross of two different magnets to accurately measure the Angle. The magnetostrictive displacement sensor can complete non-contact and thoroughly integrated absolute Angle measurement in the hydraulic cylinder, and is suitable for mobile working machines and equipment under extremely harsh working conditions.

The application of independent innovative magnetostrictive technology that can guarantee high stability, equipped with advanced detection functions, can help users significantly reduce operating costs, so it is particularly suitable for installation in the original cylinder structure.

1, Electrostatic interference and frequency modulation interference

Static interference and frequency modulation interference will make the digital display of the electronic ruler of the linear displacement sensor jump. Therefore, the signal line of the electronic ruler should be separated from the strong wire of the equipment. The electronic ruler must be grounded forcibly. Signal cables are shielded cables, and a section of the electrical box is grounded with the shielded cables. For example, in the case of high-frequency interference, the voltage measurement value of the multimeter displays normally, but the displayed number will not stop jumping; When electrostatic interference occurs, the situation is the same as that of high-frequency interference.

2. Power supply of the sensor

If the power supply capacity of the displacement sensor is insufficient, it will cause some of the following situations: the motion of the melt glue will transform the display of the clamping electronic ruler, and there will be fluctuations, or the motion of the clamping electronic ruler will cause the display fluctuation of the shooting glue electronic ruler, resulting in greater measurement error. This is more likely to occur if the driving power of the solenoid valve is shared with the power supply of the linear displacement sensor.

3. Wiring of displacement sensor

The power line and output line of the linear displacement sensor are not exchangeable; You can't connect three wires wrong. If the above line is connected incorrectly, the accuracy of the control will become very poor, and it is difficult to control it, there will be a large linear error, and the display is easy to jump and so on. The above points need special attention when the displacement sensor is installed and used.

4. Specific requirements for neutrality, parallelism and Angle

The alignment of the linear displacement sensor needs to be very good, but the allowable error of parallelism is ±0.5mm and the allowable error of Angle is ±12°. However, if the parallelism error and Angle error are too large, the display display number will jump. In this case, the parallelism and Angle must be adjusted.

Magnetostrictive displacement sensor equipment performance price is relatively high, a variety of output methods are available, anti-surge, anti-radio frequency disturbance, do not require timing calibration and maintenance, convenient assembly, high precision, high stability, high reliability, long life, with input power reverse polarity protection, fine structure, environmental applicability, isolation explosion-proof type.