CN101261140A - Increment type optical-electric encoder code disc for digital method discriminating rotary direction - Google Patents
Increment type optical-electric encoder code disc for digital method discriminating rotary direction Download PDFInfo
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- CN101261140A CN101261140A CNA2008101068167A CN200810106816A CN101261140A CN 101261140 A CN101261140 A CN 101261140A CN A2008101068167 A CNA2008101068167 A CN A2008101068167A CN 200810106816 A CN200810106816 A CN 200810106816A CN 101261140 A CN101261140 A CN 101261140A
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Abstract
The invention provides an incremental photoelectric encoder disc which judges the rotation direction by a digital method, comprising a disc body which is provided with an external code passage A, a middle code passage B and an internal code passage Z; the circumferences of the external code passage A and the middle code passage B are provided with grid holes which have equal radians; two grid holes adjacent to the external code passage A and two grid holes adjacent to the middle code passage B form a basic unit; the disc body is uniformly and compactly provided with a plurality of basic units; in each basic unit, one of the two grid holes of the external code passage A and one of the two grid holes of the middle code passage B are on the same sector; in the grid hole of different code passages on the same sector and the other two grid holes, the middle grid hole and the grid holes at two sides of the middle grid hole have an equal angle clearance. Both of the grid holes of the external code passage A and the grid holes of the middle code passage B of the code disc of the invention generate a counting pulse; the counting pulse logics of two paths or rotation angle used for recording the code disc subsequently have the code passage structure which is beneficial to improve resolution of the code disc by more than one time compared with the resolution of the prior art under the situation of the same processing precision.
Description
Technical field
The present invention relates to the angular position measurement field of sensing technologies, especially a kind of digital method is differentiated the incremental optical-electricity encoder code-disc of rotation direction.
Background technology
Photoelectric encoder is a kind of light harvesting, mechanical, electrical in the digital angle measurement device of one, photoelectric encoder partly is made up of light source, code-disc, detection grating, photoelectricity testing part, electronic processing circuit etc., coded system classification by forming code-disc has two kinds of increment type and absolute types.The code-disc of photoelectric encoder is a thin rounded flakes made from metal or other material, is furnished with some circle code channels above, is carved with many grid hole on every code channel according to certain rules.Code-disc structure such as Fig. 8 of existing incremental optical-electricity encoder, its code-disc has three code channels: the outer ring is code channel A, centre circle is code channel B, inner ring is code channel Z, code channel A, code channel B have only drawn 8 grid holes among Fig. 8, and actual product can have hundreds and thousands of according to the requirement of resolution, even up to ten thousand grid holes, code channel Z has only a grid hole.This incremental optical-electricity encoder, the characteristics of the coded system that its code-disc adopts are: use the method for phase demodulation to differentiate the direction that code-disc rotates, use the position, angle of the method record code-disc rotation of step-by-step counting.In order to narrate conveniently, we take out a fan section and launch from Fig. 8, obtain the code channel stretch-out view of Fig. 9, and the A1 among Fig. 9, A2, A3 are the grid holes on the code channel A, and B1, B2, B3 are the grid holes on the code channel B, and L represents pitch.As can be seen from Figure 9, grid hole on the code channel A that radian equates and the grid hole on the code channel B, the position of having staggered mutually, promptly phase differential 1/4th pitches.Because this phase differential, when code-disc was just changeing, the A phase signals was than leading 1/4th pitches of B phase signals; During counter-rotating, the B phase signals is than leading 1/4th pitches of A phase signals.Utilize this feature of code channel, carry out phase demodulation by electronic circuit, determine that counting circuit is to add counting to photoimpact, still subtract counting, thereby finish the measurement of relative angular displacement, code channel Z has only a grid hole, is used for determining the zero-bit of code-disc.Because the developing direction of photoelectric encoder is miniaturization, intellectuality, integrated, the development trend of aspect of performance is high resolving power, high precision, high frequency sound.And existing this incremental optical-electricity encoder, the arrangement mode of its code channel has restricted the development of photoelectric encoder, is difficult to improve its resolution and precision.
Summary of the invention
Purpose of the present invention just provides the incremental optical-electricity encoder code-disc that the high digital method of a kind of resolution height, precision is differentiated rotation direction.
Digital method of the present invention is differentiated the incremental optical-electricity encoder code-disc of rotation direction, comprise disk body, establish outer code channel A on the disk body, middle code channel B and interior code channel Z, interior code channel Z has only a grid hole, all have the grid hole that radian equates on the circumference of outer code channel A and middle code channel B, an elementary cell is formed in two the grid holes adjacent with middle code channel B, two grid holes that outer code channel A is adjacent, be characterized in some elementary cells of evenly gathering on the disk body, in each elementary cell, among the outer code channel A in two grid holes one with middle code channel B in two grid holes one on same sector, between the grid hole of two different code channels on this same sector and two other grid hole three, middle grid hole equates with the grid angle of spot hole gap of its both sides.
Digital method of the present invention is differentiated the principle of work of the incremental optical-electricity encoder code-disc of rotation direction: for clarity, the arrangement mode in code channel grid hole on the code-disc, represent with code channel stretch-out view 2, omitted interior code channel Z among the figure, code channel A of Fig. 2 China and foreign countries and middle code channel B two elementary cells of respectively having drawn, be respectively B1, B2, B3, the B4 on A1, A2, A3, A4 and the middle code channel B on the outer code channel A, grid hole on grid hole on the outer code channel A and the middle code channel B, following three kinds of collocation states are arranged: on the 1. outer code channel A of state grid hole A2 or A4 are arranged, there is not the grid hole on the middle code channel B; On the 2. outer code channel A of state grid hole A1 or A3 are arranged, on the middle code channel B grid hole B2 or B4 are arranged; Do not have the grid hole on the 3. outer code channel A of state, on the middle code channel B grid hole B1 or B3 are arranged.If we will have the place in grid hole to represent with numeral 1, the place in no grid hole represents that with numeral 0 binary number that state is 1. corresponding is exactly 01B so, and the binary number that state is 2. corresponding is exactly 11B, and the binary number that state is 3. corresponding is exactly 10B.During the code-disc forward rotation, the order of state exchange is: state 1. → state 2. → state 3. → state 1. → state 2. → state 3. → ..., closed circulation like this; During the code-disc backward rotation, the order of state exchange is then opposite: state 1. → state 3. → state 2. → state 1. → state 3. → state 2. → ... closed circulation like this.Obviously the order that shifts by observation state can be differentiated the direction that code-disc rotates.Because the situation on the code-disc has only three kinds, therefore every kind of corresponding binary number of situation can with the method that electronic digit is handled, differentiate the direction that code-disc rotates by the Changing Pattern of binary number.
The grid hole of the outer code channel A of the incremental optical-electricity encoder code-disc of digital method differentiation rotation direction of the present invention and the grid hole of middle code channel B all can produce count pulse, two-way count pulse logical OR is used to write down the rotational angle of code-disc later on, its code channel structure helps improving the resolution of code-disc, under the identical situation of machining precision, can be enhanced about more than once than the resolution of prior art.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a code-disc stretch-out view of the present invention;
Fig. 3 is the code-disc stretch-out view of an embodiment of the present invention;
Fig. 4 is the code-disc stretch-out view of an embodiment of the present invention;
Fig. 5 is the code-disc stretch-out view of an embodiment of the present invention;
Fig. 6 is the code-disc stretch-out view of an embodiment of the present invention;
Fig. 7 is the code-disc stretch-out view of an embodiment of the present invention;
Fig. 8 is the code-disc structural representation of prior art;
Fig. 9 is the code-disc stretch-out view of prior art.
Embodiment
A kind of digital method is differentiated the incremental optical-electricity encoder code-disc of rotation direction, comprise disk body, establish outer code channel A on the disk body, middle code channel B and interior code channel Z, interior code channel Z has only a grid hole, have the grid hole A1 that radian equates on the circumference of outer code channel A and middle code channel B, A2 and B1, B2, two grid hole A1 that outer code channel A is adjacent, two grid hole B1 that A2 is adjacent with middle code channel B, B2 forms an elementary cell, grid hole A3, A4 and grid hole B3, B4 forms another identical elementary cell, be characterized in some elementary cells of evenly gathering on the disk body, in each elementary cell, two grid hole A1 among the outer code channel A, among the A2 one with middle code channel B in two grid hole B1, one among the B2 on same sector, between the grid hole of two different code channels on this same sector and two other grid hole three, middle grid hole equates with the grid angle of spot hole gap of its both sides.
Embodiment 1, and as Fig. 2, in each elementary cell, grid hole A1 and B2 are on same sector, and the sector, front and back is respectively grid hole B1, A2.
Embodiment 2, and in Fig. 3, in each elementary cell, A1 and B1 are on same sector, and latter two sector is grid hole A2, B2 successively.
Embodiment 3, and as Fig. 4, in each elementary cell, A1 and B1 are on same sector, and latter two sector is grid hole B2, A2 successively.
Embodiment 4, and as Fig. 5, in each elementary cell, A2 and B2 are on same sector, and preceding two sectors are grid hole A1, B1 successively.
Embodiment 5, and as Fig. 6, in each elementary cell, A2 and B1 are on same sector, and the sector, front and back is respectively grid hole A1, B2.
Embodiment 6, and as Fig. 7, in each elementary cell, A2 and B2 are on same sector, and preceding two sectors are grid hole B1, A1 successively.
Claims (1)
1, a kind of digital method is differentiated the incremental optical-electricity encoder code-disc of rotation direction, comprise disk body, establish outer code channel (A) on the disk body, middle code channel (B) and interior code channel (Z), interior code channel (Z) has only a grid hole, have the grid hole (A1) that radian equates on the circumference of outer code channel (A) and interior code channel (B), (A2) and (B1), (B2), it is characterized in that: two grid holes (A1) that outer code channel (A) is adjacent, (A2) two grid holes (B1) adjacent with middle code channel (B), (B2) form an elementary cell, evenly densely covered some elementary cells on the disk body, in each elementary cell, two grid holes (A1) in the outer code channel (A), (A2) in one with middle code channel (B) in two grid holes (B1), (B2) one on same sector, between the grid hole of two different code channels on this same sector and two other grid hole three, middle grid hole equates with the grid angle of spot hole gap of its both sides.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101068167A CN100567906C (en) | 2008-04-23 | 2008-04-23 | Digital method is differentiated the incremental optical-electricity encoder code-disc of rotation direction |
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| CNB2008101068167A CN100567906C (en) | 2008-04-23 | 2008-04-23 | Digital method is differentiated the incremental optical-electricity encoder code-disc of rotation direction |
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| CN101261140A true CN101261140A (en) | 2008-09-10 |
| CN100567906C CN100567906C (en) | 2009-12-09 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429370A (en) * | 2014-09-22 | 2016-03-23 | 亿腾科技（无锡）有限公司 | Limit running self-reset limiting encoder |
| CN106525089A (en) * | 2016-11-22 | 2017-03-22 | 洛阳伟信电子科技有限公司 | High-precision angle measuring apparatus |
| CN111044087A (en) * | 2020-01-14 | 2020-04-21 | 奥维飞越通信有限公司 | High-precision magnetic induction type encoder |
| CN111680780A (en) * | 2020-05-21 | 2020-09-18 | 长春汇通光电技术有限公司 | Encoder counting device, counting method, equipment and readable storage medium |
-
2008
- 2008-04-23 CN CNB2008101068167A patent/CN100567906C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429370A (en) * | 2014-09-22 | 2016-03-23 | 亿腾科技（无锡）有限公司 | Limit running self-reset limiting encoder |
| WO2016045408A1 (en) * | 2014-09-22 | 2016-03-31 | 亿腾科技（无锡）有限公司 | Run-length limited self-resetting type limit encoder |
| CN105429370B (en) * | 2014-09-22 | 2017-09-29 | 亿腾科技（无锡）有限公司 | Run the limit spacing encoder of self-replaced type |
| CN106525089A (en) * | 2016-11-22 | 2017-03-22 | 洛阳伟信电子科技有限公司 | High-precision angle measuring apparatus |
| CN106525089B (en) * | 2016-11-22 | 2018-11-16 | 洛阳伟信电子科技有限公司 | A kind of high-precision angle-measuring equipment |
| CN111044087A (en) * | 2020-01-14 | 2020-04-21 | 奥维飞越通信有限公司 | High-precision magnetic induction type encoder |
| CN111680780A (en) * | 2020-05-21 | 2020-09-18 | 长春汇通光电技术有限公司 | Encoder counting device, counting method, equipment and readable storage medium |
| CN111680780B (en) * | 2020-05-21 | 2023-05-23 | 长春汇通光电技术有限公司 | Encoder counting device, counting method, apparatus and readable storage medium |
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| Publication number | Publication date |
|---|---|
| CN100567906C (en) | 2009-12-09 |
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Effective date of registration: 20100521 Address after: 101 No. 330098 Jiangxi city of Nanchang Province Ziyang Avenue Co-patentee after: JIANGXI PROVINCIAL TRANSPORTATION ENGINEERING GROUP CORPORATION Patentee after: Jiangxi University of Technology Address before: 101 No. 330098 Jiangxi city of Nanchang Province Ziyang Avenue Patentee before: Jiangxi University of Technology |
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