CN1183547A - Absolute multiple code disc optoelectronic shaft angle coder - Google Patents
Absolute multiple code disc optoelectronic shaft angle coder Download PDFInfo
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- CN1183547A CN1183547A CN 96111269 CN96111269A CN1183547A CN 1183547 A CN1183547 A CN 1183547A CN 96111269 CN96111269 CN 96111269 CN 96111269 A CN96111269 A CN 96111269A CN 1183547 A CN1183547 A CN 1183547A
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- code
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- shaping circuit
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Abstract
An improved absolute photoelectric shaft angle encoder, which is a photoelectric angle shift measurer, is composed of two light sources, code disks, slit, receiver, shaft set to be measured, passive shaft set, speed variator, shaping circuit, and calibration circuit. Two low-precision code disks are used to be equivalent to one high-precision code disk, avoiding the difficulty in making high-resolution, multi-digid code disk.
Description
The invention belongs to the automatic measurement technical field, relate to a kind of photoelectric angular displacement measurement mechanism, is the improvement to absolute photoelectric shaft encoder.
Prior art is by a cover light source, slit, receiver, and a block code dish and measured axis system form.When the external information source drives the rotation of measured axis system, the code form of the corresponding read head of code-disc position is constantly changed, by light illumination, modulate thick sign indicating number and the smart sign indicating number that measured axis is the rotation angle displacement information through a block code dish like this, both receiver received the particular code of this representative code-disc position.Because the code-disc groove cycle is subjected to certain limitation, for delineation less than the line cycle below 10 μ, high-quality line owing to be subjected to the influence of optical diffraction, impossible substantially.Therefore, the delineation resolution of code-disc is restricted, and can not satisfy the requirement of high resolving power code-disc.
It is little and be subjected to the problem of the influence of optical diffraction effect to the objective of the invention is to solve on a block code dish delineation line cycle of the code channel that smart sign indicating number of delineation and thick sign indicating number brought, and avoids delineating the very difficult problem of high resolving power code-disc.
Particular content of the present invention is: it comprises light source 1, code-disc 2, slit 3, receiver 4, measured axis is 5, shaping circuit 6, encoder housing 7, be characterized in: measured axis be 5 and driven axle be to be installed with speed change gear 9 between 8, at driven axle is to be installed with code-disc 10 on 8, on encoder housing 7 and the corresponding mutually respectively light source 11 of placing in the both sides of the axial direction of code-disc 10, slit 12, receiver 13, the output terminal of receiver 13 and receiver 4 is connected with the input end of shaping circuit 6, and the output terminal of shaping circuit 6 is connected with the input end of correcting circuit 14.
The course of work of the present invention: after the scrambler energising, measured axis be 5 drive that code-discs 2 rotate and by speed change gear 9 drive driven axles be 8 and code-disc 10 rotate, receiver 4 and receiver 13 receive the light signal of code-disc 2 and code-disc 10 modulation, the smart code that light signal ends circuit 14 usefulness code-discs 10 by shaping circuit 6 and school removes to proofread and correct the thick code of code-disc 2, is the particular code of high resolving power code-disc corresponding angles displacement thereby form equivalence.Code-disc 2 rotates all code-discs 10 and rotates 1 * N doubly (N is the speed ratio of speed change gear 9), and code-disc 2 output codes are 1 * M doubly (M is the figure place of code-disc 2), and code-disc 10 is output as 1 * N * M code doubly.
Good effect of the present invention: it is to adopt the lower thick code-disc of two unitss, by speed change gear mechanical couplings speedup, is two code-disc combination equivalences the higher code-disc of one units, avoided high resolving power, seniority code-disc to make difficult problem effectively, eliminate smart sign indicating number of scrambler and thick sign indicating number carry error with correcting circuit, the code of realizing two code-discs connects, and forms the measured angle displacement continuous code of absolute type complete, sealing.Make a high-resolution scrambler with two thick code-discs, make that high resolution encoder is simple and feasible, it is simple to debug, cheap.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the present invention's two code-disc code channel odd even correction codes distribution plans.
Embodiments of the invention: light source 1 and 11 is selected TSUS3400 (infrarede emitting diode) BT101, BT211, BT201 for use.Receiver 4 and 13 is selected BPW16N (silicon phototriode) 3DU for use
11, 3DU54,3DU111.Code- disc 2 and 10 adopts two nine bit code dishes.It is 0.5 that speed change gear 9 adopts modulus, and the calibration garden is respectively two kinds of gears of Ф 20, Ф 10.Measured axis be 5 and driven axle be 8 to adopt four D100086 bearings.Slit 3 and 12 adopts corresponding nine bit code dishes respectively and adopts single slit.Shaping circuit 6 adopts μ A129, μ A229, μ A339.Correcting circuit adopts with single-chip microcomputer 8031, and 80C31 makes odd even and proofreaies and correct.Code-disc 10 is equivalent to the smart sign indicating number of common code-disc, and code-disc 2 is equivalent to the thick sign indicating number of common code-disc, and the setting of code-disc code channel and gear backlash and machinery, optics manufacturing tolerance are relevant.The odd even correction principle generally requires code-disc 10 to change for two weeks as shown in Figure 2, and code-disc 2 changes a sign indicating number, so speed change gear speed increasing ratio P equals 2
M, 2
-1, M is the figure place of code-disc 2, and N is the figure place of code-disc 10, and two code-discs equivalence code-disc total bit is 2
M-1+N, combination resolution is 360 °/2
M-1+N, B
0Be the smart sign indicating number of code-disc 10, B
1Be the school control code of code-disc 10, C is the correcting code of code-disc 2, A
mAnd A
M-1It is the thick sign indicating number of code-disc 2.
Claims (1)
1, a kind of absolute type multiple code disc optoelectronic shaft-position encoder, it comprises: light source 1, code-disc 2, slit 3, receiver 4, measured axis is 5, shaping circuit 6, housing 7, it is characterized in that: measured axis be 5 and driven axle be to be installed with speed change gear 9 between 8, at driven axle is to be installed with code-disc 10 on 8, on housing 7 and the corresponding mutually respectively light source 11 of placing in the both sides of the axial direction of code-disc 10, slit 12, receiver 13, the input end of shaping circuit 6 is connected with the output terminal of receiver 13 with receiver 4 respectively, and the output terminal of shaping circuit 6 is connected with the output terminal of correcting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96111269 CN1183547A (en) | 1996-08-30 | 1996-08-30 | Absolute multiple code disc optoelectronic shaft angle coder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96111269 CN1183547A (en) | 1996-08-30 | 1996-08-30 | Absolute multiple code disc optoelectronic shaft angle coder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1183547A true CN1183547A (en) | 1998-06-03 |
Family
ID=5121051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96111269 Pending CN1183547A (en) | 1996-08-30 | 1996-08-30 | Absolute multiple code disc optoelectronic shaft angle coder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1183547A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101394B (en) * | 2009-12-17 | 2013-03-20 | 北大方正集团有限公司 | Method for accurately positioning absolute encoder and control device |
| CN101458097B (en) * | 2007-12-11 | 2013-06-19 | 阿尔卡特朗讯 | Position sensor, evaluation circuit, and electric motor |
| CN116337120A (en) * | 2023-03-29 | 2023-06-27 | 东莞市涛涛电子有限公司 | Photoelectric encoder with electronic rotating disc |
-
1996
- 1996-08-30 CN CN 96111269 patent/CN1183547A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458097B (en) * | 2007-12-11 | 2013-06-19 | 阿尔卡特朗讯 | Position sensor, evaluation circuit, and electric motor |
| CN102101394B (en) * | 2009-12-17 | 2013-03-20 | 北大方正集团有限公司 | Method for accurately positioning absolute encoder and control device |
| CN116337120A (en) * | 2023-03-29 | 2023-06-27 | 东莞市涛涛电子有限公司 | Photoelectric encoder with electronic rotating disc |
| CN116337120B (en) * | 2023-03-29 | 2024-02-13 | 东莞市涛涛电子有限公司 | Photoelectric encoder with electronic rotating disc |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |