CN1356533A - Method for correcting angle measurement error of coding disc - Google Patents
Method for correcting angle measurement error of coding disc Download PDFInfo
- Publication number
- CN1356533A CN1356533A CN 00132033 CN00132033A CN1356533A CN 1356533 A CN1356533 A CN 1356533A CN 00132033 CN00132033 CN 00132033 CN 00132033 A CN00132033 A CN 00132033A CN 1356533 A CN1356533 A CN 1356533A
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- China
- Prior art keywords
- code
- envelope
- wheel
- sign indicating
- indicating number
- Prior art date
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Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 title abstract 2
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 13
- 230000005693 optoelectronics Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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- Transmission And Conversion Of Sensor Element Output (AREA)
- Optical Transform (AREA)
Abstract
The invention discloses a full code correction method for angle metering errors of a code disc. The method solves the problem that the angle metering error correction area can be changed only by re-carving the code disc or the slit in the prior art. The method obtains absolute periodic codes and square wave signals of the closed codes of the angle measurement of the coding disc by performing photoelectric conversion on alternating light signals of each code channel and performing successive frequency division on the most precise closed codes, and randomly measures the angle of the coding discSquare wave signal A of error correction area of code channel positionn－3、An－2、An－1、AnParity judgment correction of (envelope) An－2And (4) error correction is achieved. The method is simple, low in cost and applicable to actual production of coded disks.
Description
The present invention is a kind of method for correcting angle-metering error of encode disk, and any code channel (abbreviation all-key) that belongs at code-wheel all can carry out the correction method of code-wheel angular measure error all-key.
In the prior art, normally adopt the method for directly on code-wheel, scribing the sealing sign indicating number to proofread and correct to the angular measure error of code-wheel.This method is different with precision according to the metering resolution of code-wheel, from little correcting range, the design error correcting range increase time by time once or secondary, three error correction districts, this need scribe one or two, three sealing sign indicating numbers on code-wheel.The defective of this method is: when intrinsic certain correcting range is big inadequately, must be by the making again of hardware---scribe code-wheel again or scribe slit (many slits or single slit) again and could change the error correction scope, time-consuming, be unfavorable for producing in enormous quantities, sometimes owing to the restriction of physical dimension, this change is difficult to realize.In addition, along with the requirement of resolution and precision is high more, the code channel on the code-wheel is many more, brings restriction for the further raising of code-wheel precision, and manufacturing cost is raise.
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art and a kind of code-wheel angular measure error all-key correction method that is easy to produce error correction district sealing sign indicating number is provided.
Purpose of the present invention can realize by following steps:
By to relatively rotating between code-wheel and slit, and the alternation light signal of each code channel carried out opto-electronic conversion, obtain one group of every code output square wave A as the absolute cycle sign indicating number of code-wheel angular measure
1, A
2, A
3, A
4A
N-1, A
nA wherein
1Be A
2Sealing sign indicating number (A
2Envelope).
By smart sign indicating number slit opto-electronic conversion is set, obtains the former of 90 ° of two phase phasic differences as smart signal J of square wave and J envelope to code-wheel;
Square-wave signal J envelope is carried out after the signal level obtaining 90 ° of phase places output square-wave signal A that a series of frequencies reduce successively at double along triggering frequency division one by one
3(envelope), A
4(envelope) ... A
N-1(envelope), A
n(envelope); They can be respectively as A, A
4, A
5A
N-1, A
nThe sealing sign indicating number;
Any code channel position at code-wheel is provided with certain error correction district, according to A
N-3, A
N-2, A
N-1, A
nThe odd even of (envelope) is judged A
N-2End point error, and proofread and correct.
The present invention compares following advantage with prior art: by the smart sign indicating number slit to code-wheel opto-electronic conversion and electricity frequency division are set, obtain the sealing sign indicating number of the every code of absolute cycle sign indicating number of code-wheel angular measure, do not need on code-wheel, to make the sealing sign indicating number, therefore saved production cost and manufacturing procedure than prior art by delineation.In addition, because the present invention in any code channel position of code-wheel step-up error correction zone, passes through A
n(envelope), A
N-1Proofread and correct A
N-3, A
N-2End point error, the error that causes of correction coding dish foozle, setting-up eccentricity, axle system factor such as rock easily, and if find that intrinsic a certain error correction scope is big inadequately in debug process and actual the use, can choose A again
N-1, A
N-2(envelope) removes to proofread and correct A
N-4, A
N-3End point error, do not need code-wheel (or slit) is delineated sealing sign indicating number again and reset electricity hardware.Therefore this method is simple, cost is low, workable.
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the error correction schematic diagram of the code-wheel of embodiment.
The original absolute cycle code channel of sign presentation code dish shown in Figure 2.
Sign shown in Figure 3 is represented sealing sign indicating number A
10Envelope, A
2Envelope.
Sign shown in Figure 4 is represented A
3(envelope) ∽ A
9(envelope).
As shown in the figure, this embodiment is typical ten code-wheels.The original absolute cycle code channel of code-wheel (also being the output square wave that code channel obtains after opto-electronic conversion) is represented with sign shown in Figure 2.A wherein
1(also be A
2Envelope), A
2, A
3, A
4, A
5, A
6, A
7, A
7, A
9And A
10Every code (minimum resolution be 21.1 ') of forming ten absolute cycle sign indicating numbers.A on the code-wheel
10And A
2The sealing sign indicating number A of code channel
10Envelope, A
2Envelope (the also output square wave that promptly obtains through opto-electronic conversion) is represented with sign shown in Figure 3.
The embodiment of the invention is passed through A
10Envelope output square-wave signal obtains A after carrying out seven electricity frequency divisions
3(envelope), A
4(envelope), A
5(envelope), A
6(envelope), A
7(envelope), A
8(envelope), A
9(envelope) seven output square-wave signal is represented with sign shown in Figure 4.This seven square waves and A
2Envelope and A
10Front cover rises as the corresponding sealing sign indicating number of ten every codes of absolute cycle sign indicating number of this code-wheel.
I, II represent gauge position respectively among the figure, when gauge position during in the I district, and A
7, A
8, A
9, A
10Correct code be 0010 (corresponding phase angle value be 63.28 ').Situation such as rock if foozle, setting-up eccentricity, axle system appear in code-wheel, cause that the end points of each code channel changes, will cause the variation of code value, for example A
8Forward terminal change (i.e. elongation) in advance, this moment the I district code A
7, A
8, A
9, A
10Therefore can become 0110, compare with former correct code 0010, produced 21.1 ' error.As A
8Forward terminal postpone conversion (promptly shortening), then can make the code angle generation-21.1 in I district ' error.
The embodiment of the invention is by being provided with the most smart code channel A
10Envelope is proofreaied and correct A
8, A
7End point error.Promptly according to A
10Envelope, A
9, A
8, A
7Odd even judge, at I district, A
10Envelope, A
9, A
8, A
7For odd number is just proofreaied and correct, promptly in the code angle value that has read, deduct 21.1 ', thereby obtain the correct code value.If A
10Envelope, A
9, A
8, A
7Be even number, just do not proofread and correct.
Equally, when the II district, judge A
10Envelope, A
9, A
8, A
7Odd even, if A
10Envelope, A
9, A
8, A
7During for odd number, proofread and correct, i.e. the A that is reading
10, A
9, A
8, A
7Add 21.1 in the code value ', obtain the correct code value.And A
10Envelope, A
9, A
8, A
7Just do not proofread and correct during for even number.
Like this, just obtain ± 21.1 ' correcting range.This correcting range is positive and negative resolution, i.e. an A
101/4 angle value of code channel.
First correction zone that the embodiment of the invention is provided with is used A
10Envelope A
9Proofread and correct A
8, A
7, can make A
8, A
7The correcting range of code channel end point error reaches ± 21.1 '.
The embodiment of the invention is at A
7Code channel is provided with second correction zone, uses A
7(envelope), A
6Proofread and correct A
5, A
4Code channel obtains ± 2.81 ° correcting range.As A
5The code channel end point error less than 21.1 ', and A
4When the end point error of code channel is 3.5 °, exceed 2.81 ° correcting range, correction can't be carried out, the embodiment of the invention then will be proofreaied and correct zone position from being arranged on A originally
7Code channel changes into and is arranged on A
6Code channel is promptly used A
6(envelope), A
5Remove to proofread and correct A
4, A
3The error of code channel.The expanded range of second correction zone after the change one times, be ± 5.62 °, make former A
4The error of code channel end points (3.5 °) has obtained effective correction.
The embodiment of the invention is at A
4Code channel is provided with the 3rd correction zone, uses A
4(envelope), A
3Proofread and correct two code channel A the thickest
2, A
1End point error, its correcting range has reached maximum value, promptly ± 22.5 °.
Claims (1)
1. code-wheel angular measure error all-key correction method is characterized in that comprising the following step:
By to relatively rotating between code-wheel and slit, and the alternation light signal of each code channel carried out opto-electronic conversion, obtain one group of every code output square wave A as the absolute cycle sign indicating number of code-wheel angular measure
1, A
2, A
3, A
4A
N-1, A
nA wherein
1As A
2Sealing sign indicating number (A
2Envelope);
By smart sign indicating number slit opto-electronic conversion is set, obtains the smart signal J of original square wave and the J envelope of 90 ° of two phase phasic differences code-wheel;
Square-wave signal J envelope is carried out after the signal level obtaining 90 ° of phase places output square-wave signal A that a series of frequencies reduce successively at double along triggering frequency division one by one
3(envelope), A
4(envelope) ... A
N-1(envelope), A
n(envelope); They the institute respectively as A
3, A
4, A
5A
N-1, A
nThe sealing sign indicating number;
In any code channel position of code-wheel step-up error correction zone, in certain correction zone according to A
N-3, A
N-2, A
N-1, A
nThe odd even of (envelope) is judged A
N-2End point error, and proofread and correct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001320335A CN1166917C (en) | 2000-11-30 | 2000-11-30 | Method for correcting angle measurement error of coding disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001320335A CN1166917C (en) | 2000-11-30 | 2000-11-30 | Method for correcting angle measurement error of coding disc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1356533A true CN1356533A (en) | 2002-07-03 |
| CN1166917C CN1166917C (en) | 2004-09-15 |
Family
ID=4594910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001320335A Expired - Fee Related CN1166917C (en) | 2000-11-30 | 2000-11-30 | Method for correcting angle measurement error of coding disc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1166917C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997867A (en) * | 2011-09-14 | 2013-03-27 | 常州科教城新能源汽车工程技术研究院 | Absolute angle measurement device and angle measurement method thereof |
| CN104035448A (en) * | 2014-05-21 | 2014-09-10 | 北京航天发射技术研究所 | Aiming sight orientation and pitching electronic control tracking aiming device and method |
-
2000
- 2000-11-30 CN CNB001320335A patent/CN1166917C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997867A (en) * | 2011-09-14 | 2013-03-27 | 常州科教城新能源汽车工程技术研究院 | Absolute angle measurement device and angle measurement method thereof |
| CN104035448A (en) * | 2014-05-21 | 2014-09-10 | 北京航天发射技术研究所 | Aiming sight orientation and pitching electronic control tracking aiming device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1166917C (en) | 2004-09-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |