Magnetostrictive displacement sensors typically utilize the magnetostrictive principle, employing the cross-linking of two different magnets to generate a strain pulse signal for precise angle measurement. These sensors enable non-contact, fully integrated absolute angle measurement within hydraulic cylinders, making them suitable for mobile machinery operating in extremely harsh conditions. Employing innovative magnetostrictive technology that ensures high stability, and equipped with advanced detection functions, they significantly reduce operating costs, making them particularly suitable for installation in existing cylinder structures. Below, we will discuss some precautions for using magnetostrictive displacement sensors.
1. Electrostatic interference and frequency modulation interference
Electrostatic discharge (ESD) and frequency modulation (FM) interference can cause the digital display of a linear displacement sensor to fluctuate. Therefore, the signal line of the linear displacement sensor should be kept separate from the power lines of the equipment. The linear displacement sensor must be forcibly grounded. Shielded cables should be used for the signal line, and one end of the cable should be grounded to the shield. For example, under high-frequency interference, the multimeter's voltage measurement may appear normal, but the displayed number will fluctuate continuously; the same situation occurs when ESD occurs.
2. Power supply status of the sensor
If the power supply capacity of the displacement sensor is insufficient, it can cause the following problems: the movement of the molten plastic will cause fluctuations in the display of the mold closing electronic ruler, or the movement of the mold closing will cause fluctuations in the display of the injection electronic ruler, resulting in larger measurement errors. This situation is more likely to occur if the power supply for the solenoid valve is shared with the power supply for the linear displacement sensor.
3. Wiring of the displacement sensor
The power and output lines of a linear displacement sensor cannot be interchanged; the three wires must not be connected incorrectly. If these wires are connected incorrectly, the control accuracy will be very poor, making control difficult and resulting in large linear errors, as well as display fluctuations. These are all points that require special attention during the installation and use of displacement sensors.
4. Specific requirements for neutrality, parallelism, and angles.
The alignment of the linear displacement sensor needs to be excellent, with a parallelism tolerance of ±0.5mm and an angle tolerance of ±12°. However, if the parallelism and angle errors are too large, the displayed numbers will jump. In this case, the parallelism and angle must be adjusted.
Magnetostrictive displacement sensors offer high performance at a reasonable price, with multiple output methods available. They are surge-proof, RF interference-proof, require no periodic calibration or maintenance, are easy and quick to assemble, and feature high precision, high stability, high reliability, long lifespan, reverse polarity protection for input power, sophisticated construction, strong environmental adaptability, and explosion-proof design. For any further questions, please feel free to contact us.
