Pulse output type rotation speed sensor
A speed sensor and pulse output technology, applied in the field of vehicle sensors, can solve the problems of weak anti-interference ability of the output signal, limited use environment, short service life, etc., and achieve strong anti-interference ability, convenient installation and use, and no power supply Effect
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[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0016] A pulse output speed sensor, including a gear plate installed on a rotating shaft, a permanent magnet for magnetic pulse sensing, a soft magnet, and an induction coil assembly. Excellent anti-interference performance; using passive design technology, no external power supply is required.
[0017] to combine figure 1 As shown, the present invention uses the principle of magnetoelectric induction to realize speed measurement, that is, when the gear rotates, the magnetic field lines passing through the sensor coil change, and a periodic voltage is generated in the sensor coil, and its amplitude is related to the rotational speed. The higher the rotational speed, the higher the output voltage. High, the output frequency is proportional to the speed. As the speed increases further, the magnetic circuit loss increases, and the output potenti...
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