Passive rotating speed counting device and counting method thereof

Abstract

The invention relates to technology for the field of rotating speed counting equipment of rotating objects, in particular to a passive rotating speed counting device and a counting method thereof, which has the advantages that the rotating speed measurement is free from interference, high in measurement accuracy, passive and safer, and is suitable for rotating characteristic measurement under severe environments such as high temperature, low temperature, underwater, high electromagnetic interference and the like. The device comprises a processing device, an optical fiber transmission channel and a turntable, wherein the optical fiber transmission channel comprises a transmitting optical fiber and a receiving optical fiber; the transmitting optical fiber transmits an optical signal by a transmitting core wire; the receiving optical fiber receives the optical signal transmitted by the transmitting optical fiber by a receiving core wire; the turntable is arranged on a rotating speed output shaft of a rotating speed output device to be measured and is blocked on an optical path between the transmitting optical fiber and the receiving optical fiber; at least one group of through holes are arranged on the turntable; in the process of rotating the turntable, the through holes are intermittently connected with the optical path between the transmitting optical fiber and the receiving optical fiber; and the processing module is used for processing the optical signal received by the receiving optical fiber so as to calculate the rotating speed.

Description

technical field [0001] The invention relates to the technology in the field of rotational speed counting equipment for rotating objects, in particular to a passive rotational speed counting device and a counting method thereof with simple structure, safe use and wide application range. Background technique [0002] At present, the speed measurement and counting of rotating objects are basically realized by various speed sensors. There are many kinds of speed sensors and they are widely used. The reason is that various motors are widely used in automatic control systems and automatic instruments. There are strict requirements for the accurate measurement of low speed (such as less than one revolution per hour), high speed (such as hundreds of thousands of revolutions per minute), stable speed (such as the error is only a few ten thousandths) and instantaneous speed. [0003] Commonly used speed sensors include magnetoelectric induction type, photoelectric effect type, Hall ef...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to overcome the disadvantages of poor safety, susceptibility to interference and low measurement accuracy of the traditional rotational speed sensor, and provide a passive rotational speed counting device and its counting method, so that the rotational speed measurement can be measured without interference. High precision, passive and safer, suitable for measurement of rotational characteristics in harsh environments such as high temperature, low temperature, underwater and strong electromagnetic interference

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