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Wide-range high-accuracy rotate speed measuring circuit

A speed measurement and high-precision technology, applied in the field of wide-range high-precision speed measurement circuits, can solve the problems of large measurement error and narrow speed measurement range, and achieve the effects of simple structure, wide speed measurement range and high measurement accuracy

Active Publication Date: 2013-06-26
北方通用电子集团有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a wide-range and high-precision speed measurement circuit, and solve the problems of large measurement errors and narrow speed measurement ranges in the existing speed measurement circuit

Method used

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  • Wide-range high-accuracy rotate speed measuring circuit

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with drawings and embodiments.

[0012] This circuit is a new wide-range high-precision speed measurement circuit composed of a wide-band magnetoelectric induction speed sensor, a high-speed comparator, a resistor, a capacitor, and an embedded microprocessor.

[0013] Such as figure 1 As shown, the signal output terminals of the speed sensor are respectively connected to one end of the second resistor R2, one end of the second capacitor C2, and one end of the third capacitor C3, which are used for the pull-up function of the broadband magnetic induction speed sensor and to filter the signal to enhance The anti-interference ability of the speed signal; the third capacitor C3 is used for filtering the clutter signal of the speed signal; the other end of the third capacitor C3 is respectively connected to the inverting input terminal of the comparator IC1 (input of the speed signal) and the seventh resist...

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Abstract

The invention provides a wide-range high-accuracy rotate speed measuring circuit. A digital circuit comprising a wide-frequency electromagnet induction rotate speed sensor, a high-speed comparator, a resistor, a capacitor and a micro processor is adopted. Signal filtering, compared shaping and an output rotate speed of a measured system are adopted to change a comparison value of an output comparator of the micro processor, so that system measuring accuracy is improved, and the problem that the measured system can not be continuously measured from low speed to high speed is solved. The wide-range high-accuracy rotate speed measuring circuit has the advantages of simple circuit construction, economical and practical features, simplicity in integration, high measuring accuracy, wide measuring range and the like. The wide-range high-accuracy rotate speed measuring circuit is suitable for situations that rotate speed is accurately measured in a wide range during a procedure of controlling a mechanism needed to be controlled to rotate.

Description

technical field [0001] The invention relates to a speed measuring circuit, in particular to a wide range and high precision rotating speed measuring circuit for measuring a rotating mechanism running at high speed. Background technique [0002] During the operation of a small turbojet engine, the operating speed changes from tens to hundreds of thousands of revolutions per minute, and a wide range and high-precision speed measuring device is required to measure its speed. At present, most of them use magnetoelectric induction sensors as measuring devices to measure their rotational speed. Although the magnetoelectric induction sensor has the advantages of non-contact and strong anti-interference, but because of the higher the induction speed, the signal output voltage is higher, and the corresponding noise voltage is higher; the signal output voltage is lower when the speed is lower. Ordinary speed measuring circuits tend to cause large errors in the measured speed when mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/44
Inventor 杨叶青路风杨威王航洲周伟丰
Owner 北方通用电子集团有限公司
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