CN101344403A - Double-group number-reading absolute photoelectric coded disk - Google Patents
Double-group number-reading absolute photoelectric coded disk Download PDFInfo
- Publication number
- CN101344403A CN101344403A CNA2008100510992A CN200810051099A CN101344403A CN 101344403 A CN101344403 A CN 101344403A CN A2008100510992 A CNA2008100510992 A CN A2008100510992A CN 200810051099 A CN200810051099 A CN 200810051099A CN 101344403 A CN101344403 A CN 101344403A
- Authority
- CN
- China
- Prior art keywords
- code
- circle
- photic zone
- slit
- disc
- 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.)
- Pending
Links
Images
Landscapes
- Optical Transform (AREA)
Abstract
The invention relates to an absolute photoelectric coded disk with two groups of reading, which belongs to one photoelectric coded disk in the photoelectric measurement technology field. The technical problem to be solved is to provide the absolute photoelectric coded disk with two groups of reading. The technical proposal for the solution is that: the absolute photoelectric coded disk comprises a code disk and a slit disk. The code disk comprises N circles of code channels, N is a natural number which is greater than or equal to 3; the slit disk is the slit disk with the two groups of reading and N circles and is matched with the code disk, the diameter of each circle from the smallest inner circle to the biggest outer circle is equal to the diameter of the corresponding circle of the code disk; the code disk and the slit disk with the two groups of reading are arranged on a main shaft of an encoder, thereby forming the absolute photoelectric coded disk with the two groups of reading.
Description
Technical field
The invention belongs to a kind of photoelectric coded disk that relates in the photoelectric measurement technical field.
Background technology
Optical electric axial angle encoder is the representative photoelectric displacement sensor of measured angular displacement, be widely used in national defence, industry and the sciemtifec and technical sphere, and the core component of optical electric axial angle encoder is exactly a photoelectric coded disk, and it comprises code-disc and slit plate.
Optical electric axial angle encoder is mounted in the angle measurement element on the main body instrument.Generally speaking, each axle of main body instrument is fastened an optical electric axial angle encoder only is installed, and the photoelectric coded disk of the optical electric axial angle encoder that adopts all is the code-wheel of single group number-reading usually.But on some environment, place, some equipment, adopt the scrambler of single group number-reading, make the reliability of main body instrument work can not get guaranteeing, for example: in the environment of space technology, spaceborne photoelectric tracking, observation, sight device, reliability requirement to the work of main body instrument is very high, to the photoelectric switching circuit requirement cold standby of used optical electric axial angle encoder.And realize that cold standby need fasten the optical electric axial angle encoder that two single group number-readings are installed in each of main body instrument usually, will occupy the very large space of main body instrument like this.For space technology, the volume and weight of main body instrument is subjected to strict restriction.Therefore, must try every possible means to address this problem.If can on a scrambler, realize the cold standby of photoelectric switching circuits such as luminotron, receiving tube, can reduce the mechanical-optical setup of main body instrument, effectively alleviate the weight of main body instrument, can guarantee the functional reliability of main body instrument again.
The prior art the most approaching with the present invention is the absolute optical electric axis angle code-wheel of single group number-reading of Chinese Academy of Sciences's Changchun optical precision optical machinery and the exploitation of reason Research Institute, as depicted in figs. 1 and 2: comprise code-disc 1, slit plate 2.Code-disc 1 has N circle code channel, and slit plate 2 is the slit plates with N circle that are complementary with code-disc 1, N be greater than, equal 3 natural number.
What Fig. 1 showed is the pattern of code-disc 1, and from the extremely maximum outer ring of the inner lane of minimum, the regularity of distribution in photic zone and light tight district is:
First lap: 0 °～180 ° light tight, 180 °～360 ° printing opacities;
Second circle: 0 °～90 ° are light tight, 90 °～270 ° printing opacities, and 270 °～360 ° are light tight;
The 3rd circle: two photic zones and two light tight districts are arranged, and photic zone and light tight sector width equate that first photic zone is since 45 °;
N circle: have 2
N-2Individual photic zone and 2
N-2Individual light tight district, photic zone and light tight sector width equate that first photic zone is from 90 °/2
N-2Beginning.
What Fig. 2 showed is the pattern of slit plate 2, and slit plate 2 is from the extremely maximum outer ring of the inner lane of minimum, and every loop diameter equates that with code-disc 1 corresponding each loop diameter the regularity of distribution in slit photic zone and light tight district is:
First lap: located a slit photic zone for 0 °, width is 50 μ m;
Second circle: located a slit photic zone for 0 °, width is 50 μ m;
The 3rd circle: located a slit photic zone for 0 °, width is 50 μ m;
The N-1 circle: located a slit photic zone for 0 °, width is 50 μ m;
The N circle: locate respectively to have two slit photic zones for 0 °, 180 °, width equates with code-disc N circle.
Above-mentioned code-disc 1 and slit plate 2 are installed on the same main shaft, and code-disc 1 rotates with main shaft, and slit plate 2 maintains static.When main axis rotation, relative rotation between code-disc 1 and the slit plate 2, the light that luminotron sends is modulated into the light signal that contains the fixed angle code and shines on the photoelectric receiving tube through the photic zone of code-disc 1 with slit plate 2, and the photosignal of generation is sent to treatment circuit in real time; Treatment circuit is translated into N-2 position natural binary code with the circle of the N-2 in photosignal code channel and is called thick sign indicating number, the N ring signal is subdivided into some natural binary codes is called smart sign indicating number, at last essence sign indicating number, N-1 circle correcting code and thick sign indicating number are processed into the output of multidigit scale-of-two angle code.
This photoelectric coded disk has only single group number-reading, does not possess the cold standby of treatment circuits such as luminotron, photoelectric receiving tube, in case single group number-reading breaks down, the reliability of main body instrument work can not get guaranteeing, causes damage to work.
Summary of the invention
In order to overcome the defective that prior art exists, the objective of the invention is to make the reliability of main body instrument work to be guaranteed.The absolute type photoelectricity code-wheel of a kind of double-group number-reading of ad hoc meter is used for absolute optical encoder, is implemented in the cold standby of the photoelectric switching circuit of the photoelectric encoder in the main body instrument.
The technical problem to be solved in the present invention is: the absolute type photoelectricity code-wheel that a kind of double-group number-reading is provided.The technical scheme of technical solution problem comprises code-disc 1, slit plate 3 as shown in figures 1 and 3.
The pattern of code-disc 1 was described in background technology, had N circle code channel, N be greater than, equal 3 natural number, to maximum outer ring, the regularity of distribution in photic zone and light tight district is from the inner lane of minimum:
First lap: 0 °～180 ° light tight, 180 °～360 ° printing opacities;
Second circle: 0 °～90 ° are light tight, 90 °～270 ° printing opacities, and 270 °～360 ° are light tight;
The 3rd circle: two photic zones and two light tight districts are arranged, and photic zone and light tight sector width equate that first photic zone is since 45 °;
N circle: have 2
N-2Individual photic zone and 2
N-2Individual light tight district, photic zone and light tight sector width equate that first photic zone is from 90 °/2
N-2Beginning.
What Fig. 3 showed is the pattern of the slit plate 3 of double-group number-reading, slit plate 3 is the slit plates with N circle that are complementary with code-disc 1, from the extremely maximum outer ring of the inner lane of minimum, every loop diameter equates that with code-disc 1 corresponding each loop diameter the regularity of distribution in photic zone and light tight district is:
First lap: locate respectively to have a slit photic zone for 0 °, 45 °, width is 50 μ m;
Second circle: locate respectively to have a slit photic zone for 0 °, 45 °, width is 50 μ m;
The 3rd circle: locate respectively to have a slit photic zone for 0 °, 45 °, width is 50 μ m;
The N-1 circle: locate respectively to have a slit photic zone for 0 °, 45 °, width is 50 μ m;
The N circle: locate respectively to have two slit photic zones for 0 °, 45 °, 180 °, 225 °, width equates with code-disc N circle.
Principle of work of the present invention: the principle of work of the absolute type photoelectricity code-wheel of double-group number-reading system as shown in Figure 4, it comprises main light emission pipe 4, code-disc 1, slit plate 3, key light electricity receiving tube 5, main shaft 6, main treatment circuit 7, is equipped with luminotron 8, is equipped with photoelectric receiving tube 9, is equipped with treatment circuit 10.
During main encoder work, code-disc 1 is with main shaft 6 rotations, and the light that main light emission pipe 4 sends shines on the key light electricity receiving tube 5 through code-disc 1, double-group number-reading slit plate 3, and key light electricity receiving tube 5 produces photosignal and sends into scrambler master treatment circuit 7 in real time; Main treatment circuit 7 is translated into N-2 position natural binary code with the circle of the N-2 in key light electric signal code channel signal and is called thick sign indicating number, the N ring signal is subdivided into some natural binary codes is called smart sign indicating number, at last essence sign indicating number, N-1 circle correcting code and thick sign indicating number are processed into the output of multidigit natural binary angle code.
When being equipped with scrambler work, code-disc 1 is with main shaft 6 rotations, be equipped with light that luminotron 8 sends on code-disc 1, slit plate 3 shine fully photoelectric receiving tube 9, being equipped with photoelectric receiving tube 9 produces photosignals and sends into scrambler in real time and be equipped with treatment circuit 10, being equipped with treatment circuit 10 will be equipped with N circle code channel in the photosignal and translate signal and become N position natural binary code to be called thick sign indicating number, the N+2 ring signal is subdivided into some natural binary codes is called smart sign indicating number, at last essence sign indicating number, N+1 circle correcting code and thick sign indicating number are processed into the output of multidigit natural binary angle code.
During main encoder work, be equipped with the work of scrambler no power; When being equipped with scrambler work, the work of main encoder no power; Active and standby scrambler is cold standby each other.
Good effect of the present invention: can be implemented in the photoelectric encoder and back up treatment circuits such as luminotron, photoelectric receiving tube.Under the situation that guarantees functional reliability, reduce the mechanical-optical setup part of a photoelectric encoder, can reduce main body instrument volume effectively, alleviate weight of equipment, reduce cost.
Description of drawings
Fig. 1 is an absolute type code-disc pattern synoptic diagram
Fig. 2 is the slit plate synoptic diagram of the single group number-reading of prior art
Fig. 3 is the slit plate synoptic diagram of double-group number-reading of the present invention
Fig. 4 is an absolute type photoelectricity code-wheel principle of work explanation synoptic diagram of the present invention
Embodiment
The present invention makes code-disc by absolute type code-disc pattern shown in Figure 1, and the base material of code-disc adopts K9 optical glass, and the size of diameter determines according to the figure place of code-disc, the method preparation that the code-disc pattern adopts chromium plating, photoetching, duplicates.
The slit plate of double-group number-reading is by pattern preparation shown in Figure 3, base material adopts K9 optical glass, the size of slit plate diameter is big or small consistent with the code-disc diameter, the number of turns of slit plate is identical with the number of turns of code-disc, both identical number of turns positions are corresponding, the method preparation that slit plate adopts chromium plating, photoetching, duplicates.
The slit plate 3 of code-disc 1 with double-group number-reading is installed on the scrambler main shaft, forms the absolute type photoelectricity code-wheel of double-group number-reading.
Claims (1)
1, a kind of absolute type photoelectricity code-wheel of double-group number-reading comprises code-disc (1), it is characterized in that also comprising slit plate (3); Code-disc (1) has N circle code channel, N be greater than, equal 3 natural number, to maximum outer ring, the regularity of distribution in photic zone and light tight district is from the inner lane of minimum:
First lap: 0 °～180 ° light tight, 180 °～360 ° printing opacities;
Second circle: 0 °～90 ° are light tight, 90 °～270 ° printing opacities, and 270 °～360 ° are light tight;
The 3rd circle: two photic zones and two light tight districts are arranged, and photic zone and light tight sector width equate that first photic zone is since 45 °;
N circle: have 2
N-2Individual photic zone and 2
N-2Individual light tight district, photic zone and light tight sector width equate that first photic zone is from 90 °/2
N-2Beginning;
Slit plate (3) is the slit plate with N circle that is complementary with code-disc (1), and from the extremely maximum outer ring of the inner lane of minimum, every loop diameter equates that with corresponding each loop diameter of code-disc (1) regularity of distribution in photic zone and light tight district is:
First lap: locate respectively to have a slit photic zone for 0 °, 45 °, width is 50 μ m;
Second circle: locate respectively to have a slit photic zone for 0 °, 45 °, width is 50 μ m;
The 3rd circle: locate respectively to have a slit photic zone for 0 °, 45 °, width is 50 μ m;
The N-1 circle: locate respectively to have a slit photic zone for 0 °, 45 °, width is 50 μ m;
The N circle: locate respectively to have two slit photic zones for 0 °, 45 °, 180 °, 225 °, width equates with code-disc N circle; The slit plate (3) of code-disc (1) with double-group number-reading is installed on the scrambler main shaft, forms the absolute type photoelectricity code-wheel of double-group number-reading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100510992A CN101344403A (en) | 2008-08-21 | 2008-08-21 | Double-group number-reading absolute photoelectric coded disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100510992A CN101344403A (en) | 2008-08-21 | 2008-08-21 | Double-group number-reading absolute photoelectric coded disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101344403A true CN101344403A (en) | 2009-01-14 |
Family
ID=40246445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100510992A Pending CN101344403A (en) | 2008-08-21 | 2008-08-21 | Double-group number-reading absolute photoelectric coded disk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101344403A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607617A (en) * | 2012-03-31 | 2012-07-25 | 中国科学院长春光学精密机械与物理研究所 | Multi-turn absolute type double-reading group combined photoelectric shaft angle encoder |
| CN107091655A (en) * | 2017-05-18 | 2017-08-25 | 中国科学院长春光学精密机械与物理研究所 | A kind of absolute optical encoder code-disc and absolute optical encoder |
-
2008
- 2008-08-21 CN CNA2008100510992A patent/CN101344403A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607617A (en) * | 2012-03-31 | 2012-07-25 | 中国科学院长春光学精密机械与物理研究所 | Multi-turn absolute type double-reading group combined photoelectric shaft angle encoder |
| CN107091655A (en) * | 2017-05-18 | 2017-08-25 | 中国科学院长春光学精密机械与物理研究所 | A kind of absolute optical encoder code-disc and absolute optical encoder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101339053B (en) | Double group reading matrix type photoelectric coded circle | |
| CN103512598B (en) | a kind of absolute type matrix encoder | |
| CN1997876A (en) | Magnetic encoder device | |
| CN106767955A (en) | A kind of implementation method of the off-axis formula measurement of absolute angle based on magnetic coder | |
| CN100405018C (en) | Absolute matrix coding disk for outputting 12-site code by precisive-code gap damaged phase | |
| CN204831337U (en) | Big absolute formula photoelectric encoder of narrow ring of hollow shaft many circles of ultra -thin type high accuracy | |
| CN101476952B (en) | Capacitor based dynamic torque sensor | |
| CN104613991B (en) | Encoder grating disc and photoelectric encoder | |
| CN101344403A (en) | Double-group number-reading absolute photoelectric coded disk | |
| CN201885729U (en) | Magnetic electricity rotary encoder | |
| CN204988306U (en) | Magnetoelectric hybrid absolute value encoder | |
| CN101984328B (en) | Single-code channel photoelectric coder | |
| CN102538841A (en) | Small absolute metal photoelectric coded disk using single-loop gray codes | |
| CN201819692U (en) | Single-code-channel photoelectric encoder for detecting rotation speed and rotation angle of rotating article | |
| CN104075740A (en) | Capacitance-type rotary encoder and method of determining absolute rotation angle | |
| CN101750106B (en) | Heavy load absolute type multi-ring resolving encoder | |
| CN101872065B (en) | Combined raster scanning system of photoelectric shaft angle encoder | |
| CN101901370B (en) | Meter reading encoding character wheel device and encoding method thereof | |
| CN106197482A (en) | Finite angle encoder magnetic steel structure and there is the encoder of this magnetic steel structure | |
| CN101441093B (en) | Minitype absolute encoder with sixteen bit output | |
| CN204388870U (en) | absolute encoder | |
| CN105157734A (en) | Encoder | |
| CN101576397A (en) | Non-contact digital signal gear sensor and using method thereof | |
| CN201352123Y (en) | Non-contact type digital signal gear sensor | |
| CN203364856U (en) | Absolute-type matrix coding disc |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090114 |