CN113418446B - Absolute position detection grating sensing device and working method thereof - Google Patents
Absolute position detection grating sensing device and working method thereof Download PDFInfo
- Publication number
- CN113418446B CN113418446B CN202110682701.8A CN202110682701A CN113418446B CN 113418446 B CN113418446 B CN 113418446B CN 202110682701 A CN202110682701 A CN 202110682701A CN 113418446 B CN113418446 B CN 113418446B
- Authority
- CN
- China
- Prior art keywords
- light
- visible light
- absolute position
- optical fiber
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
Abstract
The invention discloses an absolute position detection grating sensing device and a working method thereof. The device includes: a light emitting module capable of generating monochromatic visible light; the mobile detection target is fixed on the mobile equipment to be detected and used for reflecting the monochromatic visible light; a detection grating scale arranged on the reflected path; the lighting end is arranged on the detection grating ruler and used for collecting the reflected visible light which penetrates through the slit; the optical fiber is connected with the lighting end and is used for transmitting the collected visible light; the light output module is arranged at the tail end of the optical fiber and outputs the visible light conducted by the optical fiber; and a light output arrangement combined board for distributing the light output module array. The device can be used for achieving the purpose of displacement coding and can meet the working requirement of visually knowing the position of an object to be detected during on-site inspection.
Description
Technical Field
The invention relates to an absolute position detection grating sensing device and a working method thereof, and relates to the technical field of displacement coding through visible light.
Background
The image recognition and monitoring camera shooting technology of the power inspection robot is popularized and applied in the power industry for many years, but because of the high voltage, strong magnetic field environment, irregularity of the structure of the electrical equipment, hidden position and higher position of the electrical equipment in the application of a power system, the online detection of the temperature of a main transformer is removed, the real-time states of pressure (density), oil level, temperature, leakage current, working position and the like of most electrical equipment are not digitalized and intelligentized, and the development requirement of a power grid can not be met. In the prior art, patent document CN103712638B discloses a color absolute grating sensing device, which comprises a white light source, a color main grating ruler, a U-shaped measurement grating ruler, a superimposed prism and a photoelectric receiving tube, wherein a transparent main grating ruler substrate is scribed with black, red, orange, yellow, green, blue, indigo, purple and white transparent grating lines with the same width and larger than the wavelength of red visible spectrum, the transparent grating lines are sequentially coated in layers, the transparent grating lines are scribed on two vertical sides of the U-shaped measurement grating ruler, the transparent grating lines are respectively scribed right opposite to the vertical side and have the same width as the grating line on the bottom layer or the top layer of the main grating ruler, a beam of white light is shot into the U-shaped measurement grating ruler from the front direction of a chopper bar grating, a monochromatic light band with a fixed position is refracted by the prism after passing through a monochromatic light band with different refractive indexes on the other side of the U-shaped measurement grating ruler, seven photoelectric tubes are arranged at the positions where the seven monochromatic light bands are shot, and the seven photoelectric tubes respectively receive the monochromatic light signals and then output voltage or current signals to realize the color absolute positioning grating ruler. The device mainly needs illumination of a high-brightness sunlight source to enable colors at all positions on the color main grating ruler to be transmitted or reflected, and then transmits the transmitted or reflected position information to all triangular prisms through optical fibers to split light for arranging and combining the position codes of the optical information units. The technology has the limitation of air insulation of optical fibers and energy supply of strong light sources in outdoor high-voltage and strong electric field environments with the voltage class of 10kV and above or indoor high-voltage and strong electric field environments with the voltage class of 35kV, so that a reliable online detection displacement sensing device with low energy consumption in high-voltage and strong electric field environments needs to be researched and developed, the real-time states of pressure (density), oil level, working position and the like on electrical equipment of a power system are realized, digitalization and intellectualization are realized, and the working requirement of on-site inspection is met.
Disclosure of Invention
The invention aims to solve the technical problem of providing an absolute position detection grating sensing device and a working method thereof, which can not only meet the aim of displacement coding, but also meet the working requirement of intuitively knowing the position of an object to be detected during on-site patrol.
In order to solve the technical problems, the invention adopts the following technical scheme:
in one aspect, the present invention provides an absolute position detection grating sensing device, comprising:
an electroluminescent module capable of generating monochromatic visible light;
the mobile detection target is fixed on the mobile equipment to be detected and used for reflecting the monochromatic visible light;
a detection grating scale for blocking the reflected path;
the lighting end heads are arranged on the detection grating ruler and used for collecting the reflected visible light which penetrates through the slits in a one-to-one correspondence manner;
the optical fiber is connected with the lighting end and is used for transmitting the collected visible light;
the light output module is arranged at the tail end of the optical fiber and outputs the visible light conducted by the optical fiber;
and a light output arrangement combined board for distributing the light output module array.
As a further improvement:
the light emitting module can perform electroluminescence in an alternating current high voltage and/or strong magnetic field environment.
The light emitting module is in a strip shape, and an electroluminescent panel is arranged along the length direction of the light emitting module.
The movable detection target is provided with a light reflecting strip for reflecting visible light, and other areas outside the light reflecting strip on the movable detection target do not emit light or reflect light.
The lighting end comprises lighting columns, a first collecting mirror, an optical filter and a monochromatic light incident head, the lighting columns are arranged at the slits of the detection grating ruler in a one-to-one correspondence mode, reflected visible light is transmitted to the end portion of the detection grating ruler through the lighting columns when penetrating through the slits, collected in the monochromatic light incident head after being condensed by the first collecting mirror and filtered by the optical filter, and finally transmitted to the optical fiber.
The optical fiber is a single mode optical fiber.
The optical output module comprises a second condenser, an optical filter and a light receiving head, reflected light transmitted by the optical fiber is transmitted to the light receiving head after being condensed by the second condenser and filtered by the optical filter, and then light signals are emitted by the light receiving head.
The optical output module further includes an optical fiber collecting plate in which optical fiber insertion fixing holes into which optical fibers are inserted are arranged.
The light output modules are arranged on the light output arrangement composition board in a matrix manner.
On the other hand, the invention also provides a working method of the absolute position detection grating sensing device, which is a position detection method and comprises the following steps:
1) fixing a movable detection target capable of reflecting monochromatic visible light on an object at a position to be detected;
2) emitting monochromatic visible light through the light emitting module and reflecting the visible light by the mobile detection target;
3) a detection grating ruler is arranged on the reflected path, and lighting ends for collecting the reflected visible light penetrating through the slit in a one-to-one correspondence manner are arranged on the detection grating ruler;
4) the lighting end transmits the collected reflected visible light to the light output modules which are arranged on the light output arrangement composition board in an array mode through the optical fibers, and the light output modules receive the reflected visible light and then output light signals for displaying the position of the object to be detected.
The invention has the beneficial effects that:
the invention outputs the collected optical signals after grating processing on the optical output arrangement combination board in an array mode, so that the combination of the optical output modules forms a visual optical information unit arrangement combination encoder, the optical output modules can achieve the conventional precision or high-precision absolute position detection in a photoelectric switch or optical diffraction image subdivision mode, and the requirements of real-time simple absolute position detection and real-time high-precision absolute position detection are met.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment.
Fig. 2 is a schematic structural diagram of the electroluminescent module in the embodiment of fig. 1.
Fig. 3 is a schematic view of the structure of the lighting tip in the embodiment of fig. 1 and the lighting path thereof.
Fig. 4 is a schematic structural diagram of the light output module in the embodiment of fig. 1.
Fig. 5 is a schematic structural diagram of a fiber collection plate of the light output module.
The reference numbers in the figures are: 1. detecting a grating ruler; 2. a lighting end; 3. moving the detection target; 4. a light-reflecting strip; 5. an optical fiber; 6. a light output arrangement composition sheet; 7. a light output module; 8. an optical fiber collection plate; 9. inserting the optical fiber into the fixing hole; 10. a second condenser lens; 11. a light receiving head; 12. a light emitting module; 13. an electroluminescent panel; 14. an optical filter; 15. a first condenser lens; 16. a monochromatic light injection head; 17. a lighting column; 18. the light rays pass through.
Detailed Description
The present invention will now be described with reference to the accompanying drawings, wherein the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
As shown in fig. 1 to 5, the absolute position detection grating sensing device of the present embodiment includes: the device comprises a light emitting module 12 capable of generating monochromatic visible light, a mobile detection target 3 fixed on mobile equipment to be detected and used for reflecting the monochromatic visible light, a detection grating ruler 1 arranged on a reflected path, a lighting end 2 arranged on a slit of the detection grating ruler 1 and used for collecting the reflected visible light, an optical fiber 5 connected with the lighting end 2 and used for conducting the collected visible light, a light output module 7 arranged at the tail end of the optical fiber 5 and used for outputting the conducted visible light, and a light output arrangement combined plate 6 for distributing the light output module 7 in an array manner.
The light emitting module 12 is a strip, and an electroluminescent panel 13 is disposed along a length direction thereof. The light emitting module 12 may be electroluminescent in an ac high voltage and/or strong magnetic field environment. The movable detection target 3 is provided with a reflective strip 4 for reflecting visible light, and other areas outside the reflective strip 4 on the movable detection target 3 do not emit light or reflect light. The lighting end 2 is arranged on the backlight surface of the detection grating ruler 1 and comprises lighting columns 17, a first condenser 15, an optical filter 14 and a monochromatic light incident head 16, the lighting columns 17 are arranged at the slit position of the detection grating ruler 1 in a one-to-one correspondence mode, reflected visible light is transmitted to the end portion of the slit through the lighting columns 17 when penetrating through the slit, then is collected in the monochromatic light incident head 16 after being condensed by the first condenser 15 and filtered by the optical filter 14, and finally is transmitted to the optical fiber 5. The optical fiber 5 is a single mode optical fiber. The light output module 7 includes a second condenser 10, a filter 14 and a light receiving head 11, and the reflected light transmitted by the optical fiber 5 is transmitted to the light receiving head 11 after being condensed by the second condenser 10 and filtered by the filter 14, and then the light signal is emitted by the light receiving head 11. The optical output module 7 also comprises a fibre-collection plate 8 which is fitted with fibre-insertion fixing holes 9 for inserting the fibres 5 to ensure that the fibres 5 are aligned and correctly accessed.
The absolute position detection grating sensing device is used for position detection, in particular displacement detection in a high-voltage and strong magnetic field environment, and the detection method comprises the following steps: 1) fixing a movable detection target 3 capable of reflecting monochromatic visible light on an object at a position to be detected; 2) emitting monochromatic visible light by the light emitting module 12 and reflecting the visible light by the moving detection target 3; 3) a detection grating ruler 1 is arranged on the reflected path, and lighting ends 2 for collecting the reflected visible light penetrating through the slit in a one-to-one correspondence manner are arranged on the detection grating ruler 1; 4) the lighting end 2 transmits the collected reflected visible light to the light output modules 7 which are arrayed and distributed on the light output arrangement composition plate 6 through the optical fibers 5, and the light output modules 7 receive the reflected visible light and output light signals for displaying the position of the object to be detected.
The invention realizes the real-time detection of absolute position in one-dimensional space (space-time), and theoretically, the position is detected at most: n units and N rows, there are at most N + N2+N3+………+NNAn absolute detection position. Straight lines, circles, arcs or other arbitrary paths can also be designed in advance, and absolute position and real-time process detection of multi-dimensional space (space-time) can be realized through combination.
Specifically, the light output modules 7 are arranged in a matrix on the light output arrangement composition plate 6, and the matrix is m rows and n columns (m × n matrix). Correspondingly, the slits on the detection grating ruler 1 are vertically arranged into m rows, and the number of the slits arranged in each row is n and n2、n3……nmAnd the length of each slit outside the m-th row is equal to the length occupied by its adjacent smaller n slits. The movable detection target 3 is strip-shaped, the reflective strip 4 is arranged along the length direction of the reflective strip, and the movable detection target 3 is vertical to each row of slits of the detection grating ruler 1. The lighting ends 2 corresponding to each row of slits are sequentially connected to the light output modules 7 in the corresponding row on the light output arrangement composition plate 6 by taking n as a unit from top to bottom, namely, each n lighting ends 2 of the light output modules 7 in the corresponding row are connected with one light output module 7, so that the purpose of rapid positioning and coding can be realized. More specifically, the light output modules 7 of the present embodiment are arranged in a 3 × 6 matrix, and the detection grating ruler 1 is provided with 3 rows of slits, a first row of 6 slits, and a second row of 6 slits236, third row 63216, lighting at the slitThe ends 2 are sequentially connected with the light output modules 7 by taking 6 as a unit, namely, every 6 lighting ends 2 of the light output modules 7 in the corresponding row are connected with one. In this embodiment, the absolute position of each line is detected in a single dimension, 6 units, and 3 rows, so that 216 straight line absolute position detections can be performed. It is apparent that the movement detection target 3 is shown in fig. 1 as being located at the 1 st bit in row a, the 1 st bit in row B, and the 4 th bit in row C at the same time.
Claims (10)
1. An absolute position sensing grating sensing device, comprising:
a light emitting module (12) capable of generating monochromatic visible light;
the mobile detection target (3) is fixed on the mobile equipment to be detected and used for reflecting the monochromatic visible light;
a detection grating scale (1) for blocking the reflected path;
the lighting end heads (2) are arranged on the detection grating ruler (1) and used for collecting the reflected visible light which penetrates through the slits in a one-to-one correspondence manner;
the optical fiber (5) is connected with the lighting end (2) and is used for conducting the visible light collected by the lighting end;
a light output module (7) which is arranged at the tail end of the optical fiber (5) and outputs the visible light conducted by the optical fiber;
and a light output arrangement combined board (6) for distributing the light output modules (7) in an array manner.
2. The absolute position sensing grating sensor device of claim 1, wherein:
the light emitting module (12) can be used for electroluminescence in an alternating current high voltage and/or strong magnetic field environment.
3. The absolute position detection grating sensing device according to claim 1 or 2, wherein:
the light emitting module (12) is long and is provided with an electroluminescent panel (13) along the length direction.
4. The absolute position sensing grating sensor device of claim 1, wherein:
the movable detection target (3) is provided with a reflective strip (4) for reflecting visible light, and other areas outside the reflective strip (4) on the movable detection target (3) do not emit light or reflect light.
5. The absolute position sensing grating sensor device of claim 1, wherein:
daylighting end (2) are including adopting light post (17), first condensing lens (15), light filter (14) and monochromatic light incident head (16), and adopt light post (17) one-to-one set up in the slit department that detects grating chi (1), and the visible light of reflection conducts its tip through daylighting post (17) when permeating the slit, gathers in monochromatic light incident head (16) after first condensing lens (15) spotlight, light filter (14) are filtered again, conducts to optic fibre (5) at last.
6. The absolute position sensing grating sensor device of claim 1, wherein:
the optical fiber (5) is a single mode optical fiber.
7. The absolute position sensing grating sensor device of claim 1, wherein:
the optical output module (7) comprises a second condenser (10), an optical filter (14) and an optical receiving head (11), and reflected light transmitted by the optical fiber (5) is condensed by the second condenser (10) and filtered by the optical filter (14), then is transmitted to the optical receiving head (11), and then is transmitted by the optical receiving head (11).
8. The absolute position sensing grating sensor device of claim 7, wherein:
the light output module (7) further comprises a fiber collection plate (8) which is provided with fiber insertion fixing holes (9) into which the optical fibers (5) are inserted.
9. The absolute position sensing grating sensor device of claim 1, wherein:
the light output modules (7) are arranged on the light output arrangement combined board (6) in a matrix manner.
10. A position detection method, comprising the steps of:
1) fixing a mobile detection target (3) capable of reflecting monochromatic visible light on an object at a position to be detected;
2) emitting monochromatic visible light through the light emitting module (12) and reflecting the visible light by the mobile detection target (3);
3) a detection grating ruler (1) is arranged on the reflected path, and lighting ends (2) used for collecting the reflected visible light penetrating through the slit in a one-to-one correspondence manner are arranged on the detection grating ruler (1);
4) the lighting end (2) transmits the collected reflected visible light to the light output modules (7) which are arranged in the light output arrangement composition board (6) in an array mode through the optical fibers (5), and the light output modules (7) receive the reflected visible light and output light signals for displaying the position of an object to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110682701.8A CN113418446B (en) | 2021-06-17 | 2021-06-17 | Absolute position detection grating sensing device and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110682701.8A CN113418446B (en) | 2021-06-17 | 2021-06-17 | Absolute position detection grating sensing device and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113418446A CN113418446A (en) | 2021-09-21 |
| CN113418446B true CN113418446B (en) | 2022-04-19 |
Family
ID=77789233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110682701.8A Active CN113418446B (en) | 2021-06-17 | 2021-06-17 | Absolute position detection grating sensing device and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113418446B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543862A (en) * | 2021-10-27 | 2022-05-27 | 深圳市施特安邦科技有限公司 | Grating sensor quality detection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411538A (en) * | 2013-07-20 | 2013-11-27 | 中国科学技术大学 | Digital wave length coding optical absolute displacement sensor |
| CN103512500A (en) * | 2013-07-26 | 2014-01-15 | 广东工业大学 | Image collecting circuit of high-speed absolute grating ruler |
| CN205280099U (en) * | 2015-12-18 | 2016-06-01 | 佛山轻子精密测控技术有限公司 | Absolute position measuring device of absolute formula grating chi |
| CN107462168A (en) * | 2017-08-31 | 2017-12-12 | 广东工业大学 | A kind of new array photoelectric Raster Displacement Detection System and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203349848U (en) * | 2013-02-27 | 2013-12-18 | 叶秋诗 | Colorful absolute optical grating sensing device |
| JP6400035B2 (en) * | 2016-03-14 | 2018-10-03 | キヤノン株式会社 | Position detecting device, force sensor, and device |
| JP7148337B2 (en) * | 2018-09-14 | 2022-10-05 | キヤノン株式会社 | Position sensing apparatus, lithographic apparatus, force sensor and apparatus with force sensor |
-
2021
- 2021-06-17 CN CN202110682701.8A patent/CN113418446B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411538A (en) * | 2013-07-20 | 2013-11-27 | 中国科学技术大学 | Digital wave length coding optical absolute displacement sensor |
| CN103512500A (en) * | 2013-07-26 | 2014-01-15 | 广东工业大学 | Image collecting circuit of high-speed absolute grating ruler |
| CN205280099U (en) * | 2015-12-18 | 2016-06-01 | 佛山轻子精密测控技术有限公司 | Absolute position measuring device of absolute formula grating chi |
| CN107462168A (en) * | 2017-08-31 | 2017-12-12 | 广东工业大学 | A kind of new array photoelectric Raster Displacement Detection System and method |
Non-Patent Citations (1)
| Title |
|---|
| 新型绝对零位粗光栅的研究;林鹏，袁祥辉，吕果林，陈小强;《现代计量测试》;19950326(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113418446A (en) | 2021-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113418446B (en) | Absolute position detection grating sensing device and working method thereof | |
| CN107076665B (en) | Optical sensor module and spectrometer comprising a grating structure | |
| CN101349576A (en) | Optical fiber position digital encoder and uses thereof | |
| MX2007014015A (en) | Improved reversible, low cost, distributed optical fiber sensor with high spatial resolution. | |
| EP2244071A2 (en) | Photoelectric encoder and method for controlling operation of the same | |
| CA2781990A1 (en) | Spectral sensor for checking documents of value | |
| CN102507150A (en) | On-line real-time detection device of optical parameters, color parameters and electrical parameters of light emitting diode (LED) lamp | |
| EP0824211A3 (en) | Apparatus and method for detecting chemiluminescent light | |
| CN101256089A (en) | Optical fibre sensor with variable precision | |
| CN205283683U (en) | Optical device | |
| CN102395858A (en) | Optical detector suitable for use in light curtains | |
| CN1975342A (en) | Optical fiber grating sensing system | |
| CN109632098B (en) | Method and system for measuring space optical radiation of small-sized luminous body and optical fiber image transmission bundle | |
| CN203758905U (en) | Multi-light source light path system of channel of colorimetric pool and detection device | |
| US8767198B2 (en) | Detection apparatus | |
| CN203072041U (en) | Contact image sensor | |
| CN108091680A (en) | The light-emitting-diode panel that optical finger print recognizes in screen | |
| CN203349848U (en) | Colorful absolute optical grating sensing device | |
| CN113267277A (en) | Location perception structure based on light signal changes | |
| CN212410429U (en) | Detection system of food safety detector and food safety detector | |
| CN202886283U (en) | Triple-waveband optical transmittance measuring instrument | |
| CN104568147A (en) | Monochromator for microplate readers | |
| CN112666732B (en) | Optical detection device of backlight module | |
| CN110736425B (en) | Laser projection point coordinate measuring device and measuring method thereof | |
| CN112316409A (en) | Method for identifying different shooting points of screen by infrared laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220321 Address after: 201306 Building 1 and building 2, No. 333, Haiyang 1st Road, Lingang New District, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Applicant after: Shanghai aikeruite Control Technology Co.,Ltd. Address before: 246000 No. 2, Huancheng South Road, Yingjiang District, Anqing City, Anhui Province Applicant before: ANHUI QIHAI INTELLIGENT CONTROL TECHNOLOGY CO.,LTD. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |