Magnetic proximity switch is a kind of proximity switch, which is one of the many kinds in the sensor family. It is made of electromagnetic working principle and advanced technology, and it is a kind of position sensor. It can change the non-electric quantity or electromagnetic quantity into the desired electrical signal through the change of the position relation between the sensor and the object, so as to achieve the purpose of control or measurement.
The magnetic proximity switch can achieve the maximum detection distance with a small switching volume. It can detect magnetic objects (usually permanent magnets), and then produce a trigger switch signal output. Since the magnetic field can pass through many non-magnetic objects, the triggering process does not necessarily require the target object to be directly close to the induction surface of the magnetic proximity switch. Instead, the magnetic field is transmitted to a long distance through a magnetic conductor (such as iron). For example, signals can be transmitted to the magnetic proximity switch through high temperature to generate the triggering action signal.
Working principle of magnetic proximity switch:
The magnetic proximity switch can achieve the maximum detection distance with a small switching volume. It can detect magnetic objects (usually permanent magnets), and then produce a trigger switch signal output. Since the magnetic field can pass through many non-magnetic objects, the triggering process does not necessarily require the target object to be directly close to the induction surface of the magnetic proximity switch, but transmits the magnetic field through a magnetic conductor (such as iron) to a long distance. For example, the signal can be transmitted to the magnetic proximity switch through high temperature to generate the triggering action signal.
It works like an inductive proximity switch, containing an LC oscillator, a signal trigger, and a switching amplifier, as well as an amorphous, high-penetration magnetic soft glass metal core that causes eddy current losses and attenuates the oscillating circuit. If placed in a magnetic field (for example, near a permanent magnet), the core is designed to reduce the frequency of the oscillation circuit. At this time, the eddy current loss that is affecting the attenuation of the oscillation circuit will be reduced, and the oscillation circuit will not be attenuated. Thus, the power consumed by the magnetic proximity switch increases due to the approach of the permanent magnet, and the signal trigger is activated to produce an output signal. It has a wide range of applications, such as: can be through the plastic container or conduit to detect the object; Object detection in high temperature environment; Material resolution system; Use a magnet to identify codes, etc.
Post time: Dec-15-2022