Fiber grating sensor with high efficiency

Abstract

The invention discloses a fiber grating sensor with high efficiency. The fiber grating sensor comprises a sensor body; a grating is arranged at the top of the sensor body; a shell is arranged on the outer side of the sensor body; a projection plate is arranged on the outer side of each shell; one end of the projection plate is hinged to the shell. A light-transmitting cylinder is arranged at the top of the shell; a clamping ring is arranged at the top of the light-transmitting cylinder; a clamping groove is formed in the surface of the clamping ring, a top shell is arranged at the top of the clamping ring, a buckle ring is arranged at the bottom of the top shell, the clamping groove is sleeved with the buckle ring, reflectors are arranged on the inner walls of the top shell and the projection plate, a sliding rod is arranged at the bottom of the projection plate, the top end of the sliding rod is hinged to the projection plate, and a connecting wire is arranged at the bottom of the shell. By arranging the top shell, the projection plate and the reflectors, detection light is gathered on the grating through the reflectors, so that gathering of external light is facilitated, a lightreceiving range of the shell is enlarged, and the problem that detection cannot be achieved due to the angle problem is solved.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a fiber grating sensor with high efficiency. Background technique [0002] Grating sensors refer to sensors that use the principle of grating mosaic stripes to measure displacement. The grating is densely spaced and parallel scribed lines on a long piece of optical glass. The moiré fringes formed by the grating have the effect of optical amplification and error averaging, thus improving the measurement accuracy. The sensor is composed of four parts: scale grating, indicating grating, optical path system and measuring system. When the scale grating moves relative to the indicating grating, it forms light and dark moiré fringes that are distributed roughly according to the sinusoidal law. These stripes move at the relative motion speed of the grating, and directly irradiate the photoelectric element, and a series of electrical pulses are obtained at their output terminals, and a...

AI Technical Summary

Problems solved by technology

However, modern gratings can only receive light in one direction when receiving external light, and the receiving area is fixed, which affects the detection range of the grating sensor.

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