The use of magnetostrictive elastic displacement sensors in industrial and consumer electronics is not small, and its marketed products are gradually used in metallurgy, aviation, wood processing, petroleum, industrial vehicles, bridge monitoring and other fields.
The principle of magnetostrictive displacement sensor technology is to use the intersection of two different magnetic fields to generate a strain pulse signal, and then calculate the time period required for this signal to be explored, and convert the exact position from the two. One of these two magnetic fields comes from the active magnetic field outside the magnetostrictive sensor, and the other comes from the current pulse of the waveguide inside the magnetostrictive sensor, which is actually generated by the inherent electronics of the sensor head.
When two magnetic fields intersect, a strain pulse is generated that travels back to the sensing coil of the electronic component at a fixed speed of sound. Multiply the time period required from the moment the current pulse is generated to the time period required to measure the change pulse by this fixed velocity, and we can accurately calculate the change in the position magnet. This process is sequential, so every time the moving magnet is driven, the new position is quickly sensed. Because the output signal is a true positive position output, rather than a proportional or reamplified signal, there is no signal drift or value variation, so there is no need for timing recalibration and maintenance as is the case with other sensors.
Magneto-elastomeric displacement sensors use non-touch to monitor the displacement of a moving magnet, as there is no direct touch between the magnet and the sensor, so magnetoelastic sensors are not a problem in harsh industrial environments, such as being susceptible to oil, solution, dust or other contamination. In addition, magnetostrictive sensors are more resistant to high temperatures, high pressures, and high vibrations. Finally, because the sensing elements are non-touch, even if the sensing process is repeated, there is no wear and tear on the sensor. Magnetostrictive elastic displacement sensors are ideal for use in harsh environments such as rolling mills.
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