Laser fiber speed measuring sensor, switching value sensor and measuring method

Abstract

The invention relates to a laser fiber speed measuring sensor, a switching value sensor and a measuring method. The laser fiber speed measuring sensor comprises a shell body having an accommodating space, wherein a rotating disk is arranged inside the shell body, a plurality of through holes in the same shape are evenly formed in the surface of the rotating disk along the circumferential direction, the through holes are formed at a fixed interval, the sector size of the same diameter part entity and that of the interval are completely identical at an open hole sector length part, a rotating shaft is arranged at the center of the rotating disk, and the rotating shaft extends out of the shell body and is connected with a first structure to be measured; one side of the rotating disk is provided with an optical fiber connected to a light emitting unit, an emitting end of the optical fiber and the through holes are in the same horizontal position, so that pulsed laser can completely pass through the through holes, and the tail end of the optical fiber is connected with a laser demodulator; and the other side of the rotating disk is provided with a reflection unit, and the reflection unit receives and reflects the pulsed laser passing through the through holes, so that the pulsed laser returns to the optical fiber via an original path and enters the laser demodulator.

Description

technical field [0001] The invention relates to a laser optical fiber speed measuring sensor, a switching value sensor and a measuring method. Background technique [0002] With social development and technological innovation, the level of mechanization has been continuously improved, and in industries such as industry and agriculture, the level of automation has become higher and higher. At the same time, as the country attaches more and more importance to production and life safety. In order to meet the needs of the society and the market, the supporting safety monitoring system and detection methods have also been greatly improved. [0003] With the development and maturity of electronic equipment, it plays an important role in daily production and life as a conventional monitoring equipment because of its sensitive response, low price, and relative reliability. However, since electronic equipment as a detection equipment itself needs power supply, in special occasions ...

AI Technical Summary

Problems solved by technology

Both methods use the principle of fiber optic sensors to ensure the passive characteristics of the sensor without electricity, but its biggest disadvantage is that the fiber grating is used as the measuring element, and the fiber grating and its fixed platform are subject to high-frequency repeated stress, which is prone to fatigue. fiber grating break

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