SU1721446A1 - Device for measurement of vibration parameters - Google Patents

Abstract

The invention relates to a measurement technique and can be used to monitor and measure the parameters of the angular vibrations of objects. The aim of the invention is to improve the accuracy and sensitivity of 2 by doubling the influence of the angle of rotation on the change in the zone of the zaprofka. To do this, the light passes through the radiating light guide 10 to the transmitting light guide 9, mounted on the inertial element 3, and then passes through a regular light guide 11 U-shaped and returns to the receiving optical fibers 5 and 6. In the presence of angular vibrations that are transmitted to the inertial element 3 through the elastic elements 4 connected to the housing 1, the light guide 9 rotates, which leads to a change in the ratio of the light fluxes recorded from the output ends of the receiving light guides 5 and 6 by the photoregistering unit 7, the signal from which is transmitted are in the processing unit 8. 2 yl. sl C j yu о о o

Description

The invention relates to a measurement technique and can be used to monitor and measure the parameters of the angular vibrations of machine parts and various mechanisms.

The aim of the invention is to improve the accuracy and sensitivity by doubling the influence of the rotation angle on the change of the illumination zone.

FIG. 1 shows a diagram of the optical part of the device; in fig. 2 - the course of the light beam along the optical part when the transmitting light guide is rotated clockwise by the angle a ..

The device comprises a housing 1, a light source 2, an inertial element 3 mounted inside the housing 1 and connected with it by elastic elements 4, two receiving light guides 5 and 6, the input ends of which are fixed in the housing 1, and the output optically coupled to the photo registration a dummy unit 7, the output of which is connected to a processing unit 8, transmitting a light guide 9 attached to the inertial element 3, and its input end is optically connected with the ends of the receiving 5 and 6 and the radiating 10 light guides and the output with the ends of the U-shaped light guide 11, pinned go in case 1.

The device works as follows.

Fixed fixedly on the surface of the object to be monitored, the device body 1 makes angular oscillations similar to those of the monitored surface, which leads to vibro rotations of the inertial element 3 with the transmitting light guide 9 relative to the body 1 and modulating the light flux perceived by the photoreteating unit 7.

When the inertial IT is in the equilibrium position (i.e., there are no angular vibrations), the light from the light source 2 passes through the radiating light guide 10 and hits the input end 12 of the transmitting light guide 9, and the zone of illumination of the end face 12 is located symmetrically relative to the fiber axis 9. The light passed through the light guide 9 is divided into two equal starts at the ends of the U-shaped light guide 11. These beams, having passed one towards the other along the guide 11, return to the end 13 of the light guide 9, and are led away from it to the other. 10. At the input ends of the receiving light guides 5 and b light does not fall.

When the inertial element 3 is rotated by angle a, for example, by the hour hand, the center of the illumination zone is a torus, and 12 light guide 9 is displaced counterclockwise from the center of symmetry of this end counterclockwise by p / 2 a, and at the end 13 of the same light guide the common zone is shifted by the same amount from the center of symmetry of this end,

but clockwise. Due to the fact that the entire end 13 of the light guide 9 is displaced clockwise by an amount p / 2 a relative to the housing 1 with a fixed light guide 11, the center of the illumination zone at the ends

fiber 11 is displaced clockwise from the center of symmetry of fiber 11 by an amount of 2 p / 2 a. Since the light guide 11 is made regular, the light shchi zone with the ends of this fiber is symmetrically

the zone of illumination of these ends relative to the line of junction of these ends is offset by 2 p / 2 and counterclockwise relative to the center of symmetry of the ends of the U-shaped light guide 11. Since the end is 13

fiber 9 is offset by p / 2 "relative to fiber 11, then the light zone at the ends of the fiber 11 forms the illumination zone at the end 13, offset by 3 p / 2 a relative to the center of this end

counterclockwise, and at the end 12 of the light guide 9 - by the same amount, but clockwise from the center of the end 12, and due to the fact that the end 12 is shifted relative to the housing 1 and the radiating light guide 10 at

the value of p / 2a is clockwise, the center of the illumination zone at the ends of the receiving optical fibers 5 and 6 and the radiating light guide 10 is shifted by an amount of 4 p / 2 and clockwise relative to the axis of the radiating light guide. This perceives the light guide 5 and transmits for registration to the photoregistrating unit 7. When the inertial element rotates with the transmitting light guide 9 mounted on it counterclockwise, the device operates in the same way. Presentation of measurement information is possible in both analog and digital form. This is done by measuring the light

flux or the number of illuminated discrete receiving fibers, respectively.

Thus, in the proposed device compared to the known, there is a fourfold increase in the zone

the illumination of the ends of the receiving light guides, and, consequently, a fourfold increase in the sensitivity and measurement accuracy of the converter.

Claims (1)

Invention Formula A device for measuring vibration parameters, comprising a light source, a housing designed to be fixed to an object, an inertia element housed in the housing, and elastic elements bonded at one end to the housing, and the other with an inertia light emitting optical fiber whose input end face is optically aligned with the source light, a photoregistration unit, a processing unit, the input of which is connected to the output of the photoregistration unit, and receiving fibers, the input ends of which are located in the housing and the output optical us with photorecording unit, characterized in that, in order to increase measurement sensitivity and accuracy, it is provided with a regulator molecular waveguide U-shaped, placed in the housing, and the transfer controller molecular sveto0 five water installed on the inertial element and oriented so that its input end is optically connected with the output end of the radiating and input ends of the receiving light guides, and the output end is connected with the ends of the U-shaped light guide, the output end of the radiating light guide is located in the housing symmetrically between the receiving light guides, and the surfaces of the ends of the transmitting light guide and the interface surfaces of the ends of the light guide of U-shaped fiber and the surface of the output ends of the radiating and output ends of the receiving light guides are made in the form of rotating surfaces. FIG. 2