CN108317971B

CN108317971B - Angle detection device

Info

Publication number: CN108317971B
Application number: CN201810086855.9A
Authority: CN
Inventors: 汪舰; 杨期科; 袁运琪; 殷月红; 杨学峰; 刘明
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2018-01-30
Filing date: 2018-01-30
Publication date: 2023-06-16
Anticipated expiration: 2038-01-30
Also published as: CN108317971A

Abstract

The invention discloses an angle detection device which can detect the rotation angle of a rotating shaft of equipment. The device comprises a collimator, a semi-transparent semi-reflecting mirror, a rotating module, a convex lens, a collecting optical fiber, an optical fiber spectrometer, a processing module and a display module; the rotation module consists of an artificial protein Dan Guangzi crystal and a reflector which are perpendicular to each other, so that light beams entering and exiting the rotation module are antiparallel; the light intensity of the light reflected by the artificial protein Dan Guangzi crystal has a peak value along with the change of the wavelength, and the wavelength value corresponding to the reflection peak value changes along with the change of the incident angle of the incident light emitted to the artificial opal photonic crystal; the processing module calculates the rotation angle of the rotation module according to the corresponding relation between the rotation angle of the rotation module and the light intensity peak wavelength of the reflected light reflected from the artificial protein Dan Guangzi crystal. Compared with the prior art, the invention can realize non-contact measurement without interfering the rotation of the rotating shaft.

Description

Angle detection device

Technical Field

The invention belongs to the technical field of detection, relates to detection of a rotating shaft rotating angle, and particularly relates to detection of the rotating shaft rotating angle in mechanical equipment.

Background

The angle measuring device has wide application in various fields such as industry, maritime, military, geography, well drilling, machinery and the like. Many mechanical devices have a rotating shaft, and the rotation angle of the rotating shaft needs to be detected. The existing angle detection device is generally directly or indirectly connected with the rotating shaft, and the measurement of the rotating angle is realized through the associated devices such as gears and the like. However, this design affects the rotation of the rotating shaft, increases friction loss, and occupies a relatively large space at the position of the rotating shaft. There is thus a need for a new angle detection device that reduces the impact on the rotation axis.

Photonic crystals are artificial microstructured materials formed by periodic arrangements of medium of different refractive indices, whose dielectric constants are periodically arranged in space so that light propagates therein creating an energy band structure. Waves of a certain frequency range cannot propagate in this periodic structure, that is to say that this structure itself presents a "forbidden band". One can control the behavior of photons by changing certain parameters of the photonic crystal. For example, in terms of sensing detection, patent CN102680429a proposes a microcavity gas sensor employing photonic crystals, which enables detection of the refractive index of the gas. Patent CN102494816B proposes a method and apparatus for detecting pressure based on photonic crystal fibers.

Disclosure of Invention

The invention aims to solve the problems, and provides an angle detection device which can conveniently and rapidly detect the rotation angle of a rotating shaft and avoid interference to the rotation of the rotating shaft.

The invention adopts the following technical scheme:

an angle detection device comprises a collimator, a semi-transparent semi-reflecting mirror, a rotating module, a convex lens, a collecting optical fiber, an optical fiber spectrometer, a processing module and a display module; the rotation module further comprises an artificial protein Dan Guangzi crystal and a reflector; the artificial protein Dan Guangzi crystal and the reflector are mutually perpendicular, and the contact part of the artificial protein Dan Guangzi crystal and the reflector is positioned at the axis of the rotating shaft of the object to be detected; the parallel light emitted by the collimator passes through the half-mirror and enters the rotation module, one part of the light in the rotation module is reflected by the reflector after being reflected by the artificial protein Dan Guangzi crystal, and the other part of the light is reflected by the artificial protein Dan Guangzi crystal after being reflected by the reflector, and the incident angles of the two parts of light are equal to the incident angle formed on the surface of the artificial opal photonic crystal, so that the light intensity of the reflected light is the same along with the change condition of the wavelength; the parallel light beams reflected by the rotating module are parallel to the parallel light beams emitted by the collimator, the reflected parallel light beams are reflected to the convex lens by the semi-transparent and semi-reflective mirror, and then are focused to the input end of the collecting optical fiber by the convex lens; the collecting optical fiber outputs an optical signal to the optical fiber spectrometer; the optical fiber spectrometer converts the received optical signals into electric signals and outputs the electric signals to the processing module; the processing module analyzes and calculates the electric signals transmitted by the optical fiber spectrometer, and the calculation result is displayed by the display module.

In the above technical solution, the artificial protein Dan Guangzi crystal is made of polymer or silicon dioxide material.

In the above technical solution, the light intensity of the light reflected by the rotation module has a peak value along with the change of the wavelength, and the wavelength value corresponding to the reflection peak value changes along with the change of the incident angle of the incident light to the artificial opal photonic crystal.

In the above technical solution, the processing module calculates the rotation angle of the rotation module according to the correspondence between the rotation angle of the rotation module and the light intensity peak wavelength of the reflected light reflected from the artificial protein Dan Guangzi crystal.

Compared with the prior art, the invention utilizes the characteristics of the photonic crystal, when a beam of white light is incident from different angles, the reflective capability of the photonic crystal on light with different wavelengths is different, so that the incident light direction is fixed, the photonic crystal is rotated, the incident direction of the incident light can be relatively changed, the light reflected by the photonic crystal is received, and the rotating angle can be calculated by analyzing the light wavelength corresponding to the light intensity peak value of the light reflected by the photonic crystal.

The invention has the following characteristics and beneficial technical effects:

1. the angle detection device of the invention realizes non-contact measurement and does not interfere with the rotation of the rotating shaft because the angle detection device processes and analyzes the light reflected from the rotating module.

2. The structure of the artificial opal photonic crystal is adjustable, so that the reflected light in different wavelength ranges can be monitored, and the interference of peripheral light can be avoided to a certain extent.

Drawings

FIG. 1 is a schematic view of the overall structure of an angle detecting device of the present invention;

FIG. 2 is a reflection spectrum of incident light at different angles of incidence on an artificial opal photonic crystal in accordance with an embodiment of the present invention;

in the figure, 1-collimator, 2-semi-transparent semi-reflecting mirror, 3-rotation module, 4-convex lens, 5-collecting optical fiber, 6-optical fiber spectrometer, 7-processing module, 8-display module, 9-artificial protein Dan Guangzi crystal and 10-reflecting mirror.

Detailed Description

In order to make the novel technical scheme more clear, the invention is further described below with reference to the accompanying drawings and the specific examples, but the protection scope of the invention is not limited thereto.

As shown in fig. 1, the angle detection device of the present invention can be used for detecting the rotation angle of a machine rotation shaft. The device comprises a collimator 1, a semi-transparent semi-reflecting mirror 2, a rotating module 3, a convex lens 4, a collecting optical fiber 5, an optical fiber spectrometer 6, a processing module 7 and a display module 8; the rotation module 3 further comprises an artificial opal photonic crystal 9 and a reflector 10; the artificial opal photonic crystal 9 and the reflector 10 are mutually vertical, and the contact part of the artificial opal photonic crystal 9 and the reflector 10 is fixed at the axis position A of the rotating shaft of the object to be detected; the parallel light emitted by the collimator 1 enters the rotating module 3 after passing through the half-mirror 2, one part of the light is reflected by the artificial opal photonic crystal 9 and then reflected by the reflector 10, and the other part of the light is reflected by the artificial opal photonic crystal 9 and then reflected by the reflector 10; the light beam reflected by the rotating module 3 is reflected to the convex lens 4 by the half-mirror 2, and then is focused to the input end of the collecting optical fiber 5 by the convex lens 4; the collection optical fiber 5 outputs an optical signal to the optical fiber spectrometer 6; the optical fiber spectrometer 6 converts the received optical signal into an electric signal and outputs the electric signal to the processing module 7; the processing module 7 analyzes and calculates the electric signal transmitted by the optical fiber spectrometer 6, and the calculation result is displayed by the display module 8.

Example 1

The present embodiment has the various components connected according to the angle detection device shown in fig. 1.

First, the rotation angle of the rotation shaft is defined: when the reflector 10 and the collimator 1 in the rotation module 3 emit light beams perpendicular to each other, and the light beams are directed to the front surface of the reflector 10, the rotation angle of the rotation shaft is considered to be 0 degrees at this time; when the artificial opal photonic crystal 9 in the rotation module 3 and the light beam emitted from the collimator 1 are perpendicular to each other, and the light beam is directed to the front surface of the artificial opal photonic crystal 9, it is considered that the rotation axis is rotated by an angle of 90 degrees at this time. The angle detection range of the device is 0-90 degrees.

The specific detection process is as follows: the parallel light emitted by the collimator 1 enters the rotating module 3 after passing through the half-mirror 2, one part of the light is reflected by the artificial opal photonic crystal 9 and then reflected by the reflector 10, and the other part of the light is reflected by the artificial opal photonic crystal 9 after being reflected by the reflector 10, and the incident angles of the incident light of the two parts of light to the artificial opal photonic crystal 9 are equal, so that the wavelengths corresponding to the reflection peaks are the same; the light reflected by the rotating module 3 is reflected to the convex lens 4 by the half-mirror 2, and then is focused to the input end of the collecting optical fiber 5 by the convex lens 4; the collecting optical fiber 5 outputs an optical signal to the optical fiber spectrometer 6; the optical fiber spectrometer 6 analyzes the optical signal to obtain the reflection peak wavelength, and outputs the wavelength electric signal to the processing module 7; the processing module 7 calculates the rotation angle of the rotation module 3 according to the corresponding relation between the rotation angle of the rotation module 3 and the reflection peak wavelength of the reflection light reflected from the artificial opal photonic crystal 9, and displays the calculation result through the display module 8.

The processing module 7 is a singlechip;

the display module 8 is a liquid crystal display;

the artificial opal photonic crystal 9 is composed of a polymer;

the light intensity reflected by the artificial opal photonic crystal 9 has a reflection peak, and the wavelength corresponding to the reflection peak changes with the change of the incident angle of the incident light to the artificial opal photonic crystal 9.

The liquid crystal display of the display module 8 displays the calculation result of the singlechip.

As shown in fig. 2, the reflection peak of the reflected light reflected by the artificial opal photonic crystal 9 in the first embodiment moves in the short wave direction with an increase in the incident angle of the incident light. When the rotation module 3 rotates, the reflection peak of the reflected light reflected from the artificial opal photonic crystal 9 in the rotation module 3 changes, i.e. corresponds to different reflection peak wavelengths for different angles of rotation. The processing module 7 calculates the rotation angle of the rotation module 3 according to the corresponding relation of the reflection peak wavelength. Finally, the display module 8 is used for displaying the display information.

The invention can not interfere the rotation of the rotating shaft, has simple detection and can be widely used for detecting the rotation angle of the rotating shaft in mechanical equipment.

The foregoing is only one embodiment of the invention and any modifications, improvements, equivalents, etc. that come within the spirit and principles of the invention are desired to be protected by the following claims. Those skilled in the art will appreciate numerous variations and modifications of the invention, such as: if the number of the artificial opal photonic crystal 9 and the mirror in the rotation module 3 is increased or both are extended, the angle detection range can be increased, and these changes and modifications fall within the scope of the present invention.

Claims

1. The angle detection device is characterized by comprising a collimator (1), a semi-transparent and semi-reflective mirror (2), a rotating module (3), a convex lens (4), a collecting optical fiber (5), an optical fiber spectrometer (6), a processing module (7) and a display module (8); the rotation module (3) further comprises an artificial protein Dan Guangzi crystal (9) and a reflector (10); the artificial protein Dan Guangzi crystal (9) and the reflector (10) are mutually perpendicular, and the contact part of the artificial protein Dan Guangzi crystal and the reflector is fixed at the axis position (A) of the rotating shaft of the object to be detected; parallel light emitted by the collimator (1) enters the rotating module (3) after passing through the half-transparent half-reflecting mirror (2), one part of the light is reflected by the mirror (10) after being reflected by the artificial protein Dan Guangzi crystal (9), and the other part of the light is reflected by the mirror (10) and then reflected by the artificial protein Dan Guangzi crystal (9); the light beam reflected by the rotating module (3) is reflected to the convex lens (4) by the half-transparent half-reflecting mirror (2), and then is focused to the input end of the collecting optical fiber (5) by the convex lens (4); the collecting optical fiber (5) outputs an optical signal to the optical fiber spectrometer (6); the optical fiber spectrometer (6) converts the received optical signal into an electric signal and outputs the electric signal to the processing module (7); the processing module (7) analyzes and calculates the electric signals transmitted by the optical fiber spectrometer (6), and the calculation result is displayed through the display module (8); wherein the artificial protein Dan Guangzi crystal (9) is composed of a polymer or silica material; the light intensity of the light reflected by the artificial protein Dan Guangzi crystal (9) has a peak value along with the change of the wavelength, and the wavelength value corresponding to the reflection peak value changes along with the change of the incident angle of the incident light to the artificial protein Dan Guangzi crystal (9).

2. The angle detection device according to claim 1, wherein the processing module (7) calculates the rotation angle of the rotation module according to the correspondence between the rotation angle of the rotation module (3) and the light intensity peak wavelength of the reflected light reflected from the crystal (9) of the artificial protein Dan Guangzi.

3. The angle detecting device according to claim 1, wherein the rotation angle measuring range of the angle detecting device is 0 to 90 °.