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

Inactive Publication Date: 2012-05-02
CHENGDU FANXINJIA TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] Aiming at the above-mentioned prior art, the technical problems to be solved by the present invention are: the cost of the traditional speed sensor is high, the use environment is limited, the output signal is weak, the anti-interference ability is poor, and the service life is short

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  • Pulse output type rotation speed sensor
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Embodiment Construction

[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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Abstract

The invention discloses a pulse output type rotation speed sensor, which comprises a gear disc installed on a rotation shaft, a magnetic pulse sensing permanent magnet, a soft magnet, an induction coil assembly, and a built-in signal reshaping circuit. The pulse output type rotation speed sensor disclosed by the invention can directly output large-amplitude pulse signals and has very strong anti-interference performance. The pulse output type rotation speed sensor adopts a passive designing technology and does not need external power supply, has the advantages of high intensity of output signals, strong anti-interference capability, no need of power supply, convenience in installation and use, no mechanical wear, long service life, and no need of control and provision of any excitation circuit, and can be used in smog, oil gas, hydrosphere and other environments.

Description

technical field [0001] The invention relates to the technical field of vehicle sensors, in particular to a rotational speed sensor. Background technique [0002] In modern industrial production, with the improvement of the level of science and technology, the speed detection and automatic adjustment of electromechanical equipment have become more and more important. The speed sensor is an indirect measuring device. According to the signal shape, the speed sensor can be divided into two types: analog and digital. The output signal value of the former is a linear function of the rotational speed, while the output signal frequency of the latter is proportional to the rotational speed, or its peak interval is inversely proportional to the rotational speed. [0003] Commonly used speed sensors include the following types. The torque speed sensor has a complex structure and high cost; the photoelectric speed sensor can only measure the speed value of the shaft by counting the sig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/46
Inventor 高静袁代华邓金智
Owner CHENGDU FANXINJIA TECH
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