CN103471629A - Single-ring absolute value coding disc - Google Patents
Single-ring absolute value coding disc Download PDFInfo
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- CN103471629A CN103471629A CN2013104315148A CN201310431514A CN103471629A CN 103471629 A CN103471629 A CN 103471629A CN 2013104315148 A CN2013104315148 A CN 2013104315148A CN 201310431514 A CN201310431514 A CN 201310431514A CN 103471629 A CN103471629 A CN 103471629A
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Abstract
The invention discloses a single-ring absolute value coding disc. A coding disc surface comprises an outer ring code channel, an inner ring code channel and a plurality of other code channels located between the inner ring code channel and the outer ring code channel, wherein the circle center of the outer ring code channel and the circle center of the inner ring code coding channel are different from the rotating center of the coding disc, and when the coding disc rotates, the overlapping width of light transmitting parts of the code channels and photosensitive parts of a photosensitive sensor changes according to a sine curve. According to the single-ring absolute value coding disc, the inner ring code channel and the outer ring code channel with the different circle centers are used, the size of the illumination area of the photosensitive sensor is determined by relying on the rotating positions of the inner ring code channel and the rotating positions of the outer ring code channel, and instead of carrying out location by relying on light-shade alternative grid lines of a single-ring code channel, location is achieved according to the size of the photosensitive area, corresponding to the photosensitive sensor, of the inner ring code channel and the outer ring code channel. The single-ring absolute value coding disc is simple in processing, low in cost, and high in concentration and resolution in use.
Description
Technical field
The present invention relates to the code-wheel field, particularly relate to a kind of individual pen absolute encoder dish, for mass transport industry, driving motor, machinery and plant engineering, engineering automatic field.
Background technology
Code-disc is to be made by optical glass, metal or plastics, is carved with many concentric code channels in the above, and printing opacity and the lightproof part arranged are according to certain rules arranged on each code channel.During work, light is incident upon on code-disc, code-disc rotates with moving object, and the light that sees through clear zone is accepted by light activated element after slit, and the arrangement of light activated element is corresponding one by one with code channel, the signal of exporting for the light activated element of clear zone and dark space, the former is " 1 ", and the latter is " 0 ", when code-disc is rotated in diverse location, the combination of light activated element output signal reflects the digital quantity of certain rule, has represented the angular displacement of code disk shaft.Existing individual pen absolute value encoder is that the coding that will represent angle is engraved on code-disc, and the resolution that processing technology has limited scrambler improves, and can not meet control system and rotational angle be carried out to the demand of high precision detection.The light and dark grid line that requires of existing individual pen absolute encoder dish is engraved on a code channel, so the process technology requirement is high.Existing individual pen absolute encoder dish requires the code-disc angular coding is engraved on code-disc, when the code-disc resolution requirement is higher, must need to increase the group/cording quantity of code-disc, resolution is higher, in code-disc coding, " 0 " and " 1 " shared relative area is just less, higher to the processing technology requirement, cost is also just higher; The processing technology of existing code-wheel can not meet the demand that control system is more and more higher to the angle angular resolution.
Summary of the invention
The objective of the invention is to solve the prior art problem, provide that a kind of processing is simple, cheap, high precision, high-resolution code-wheel.
The present invention addresses the above problem adopted technical scheme: a kind of individual pen absolute encoder dish, comprise outer ring code channel, inner ring code channel and some other code channels between inner ring and outer ring on described code-disc face, described outer ring code channel and inner ring code channel decentraction, and the rotation center of outer ring code channel and inner ring code channel does not overlap with the rotation center of code-disc.
In technique scheme, described outer ring code channel is comprised of two different concentric circles curves of radius.
In technique scheme, described inner ring code channel is comprised of two different concentric circles curves of radius.
In technique scheme, the overlapping area of the light transmission part of described inner ring code channel and outer ring code channel and light sensor sensitization part is according to sinusoidal variation.
In technique scheme, the output of the sinusoidal curve phase place of described inner ring code channel and outer ring code channel differs 90 degree.
Principle of work of the present invention is, whole device has also needed light sensor and signal processing circuit board, light sensor is fixed on signal processing circuit board, light sensor links together by the signal processing unit on circuit design and signal-processing board, and individual pen absolute encoder dish is arranged on the top of light sensor.
Comprise a plurality of photosensitive areas on light sensor, two curves of two of the outer ring code channel curves and inner ring code channel corresponding different photosensitive areas respectively on code-wheel, when the relative light sensor rotation of individual pen absolute encoder dish, due to the outmost turns code channel center of circle and innermost circle code channel center of circle decentraction, and the outmost turns code channel center of circle, the innermost circle code channel center of circle all with code-disc rotation center decentraction, doing the signal of exporting after difference processing after the photosensitive area sensitization of light sensor is sinusoidal signal, and the signal phase of two groups of outputs differs 90 degree.
At work, signal-processing board is processed the output signal from light sensor, if light sensor only has outer ring code channel sensitization, or only has the sensitization of inner ring code channel, and the signal after light sensor is processed can not be determined the anglec of rotation of code-disc.While only having signal-processing board to process the sinusoidal signal of photosensitive area of inner ring, outer ring code channel simultaneously, the anglec of rotation of individual pen absolute encoder dish is corresponding one by one with the signal of signal processing circuit board identification, and at this moment individual pen absolute encoder dish just can record each angle of turning axle.
In sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows: the present invention adopts the code channel of inside and outside two circle decentraction, not to rely on the light and dark grid line of individual pen code channel to locate, adopt two code channels to realize that the light sensor phase of output signal differs 90 °, by the signal to light sensor output processed just can unique definite code-disc position.The present invention have realize with low cost, precision is high, processing technology requires the characteristics such as low, the positioning precision of code-wheel no longer depend on " bright " on code-disc, " secretly " alternate code element the number, and depend on processing of circuit precision partly.
The accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the enlarged diagram of a segment encode road and light sensor in the present invention;
Fig. 3 is the structural representation of light sensor;
Fig. 4 is schematic diagram of the invention process;
Wherein: the 1st, code-wheel, the 2nd, light sensor, the 3rd, signal processing circuit board, the 1.1st, outer ring code channel, the 1.2nd, some code channels, the 1.3rd, inner ring code channel, the 2.1,2.2,2.3, the 2.4th, photosensitive area.
Embodiment
Disclosed all features in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
As shown in Fig. 1, be provided with outer ring code channel 1.1 and inner ring code channel 1.3 on code-wheel 1 of the present invention, and the some code channels 1.2 between two; Outer ring code channel 1.1 is comprised of two different concentric circles curves of radius, and inner ring code channel 1.3 also is comprised of two different concentric circles curves of radius; But outer ring code channel 1.1, inner ring code channel 1.3 all do not overlap with the rotation center of code-wheel 1.
As shown in Figure 3, be the structural representation of light sensor 2, be provided with a plurality of photosensitive areas 2.1,2.2,2.3,2.4 on light sensor 2; Be illustrated in figure 2 the structure for amplifying schematic diagram in the segment encode road in Fig. 1, photosensitive area 2.1, photosensitive area 2.2 on the corresponding light sensor 2 of the outer ring code channel 1.1 on code-wheel 1, the photosensitive area 2.3 on the corresponding light sensor of inner ring code channel 1.3, photosensitive area 2.4.
As shown in Figure 4, light sensor 2 is arranged on signal processing circuit board 3, and code-wheel 1 is between light source and light sensor 2, when light source luminescent is radiated on code-wheel 1, when code-wheel 1 rotates with respect to light sensor 2, due to the center of circle of outer ring code channel 1.1 and the center of circle decentraction of inner ring code channel 1.3, and the center of circle of outer ring code channel 1.1, the center of circle of inner ring code channel 1.3 all with code-wheel 1 rotation center decentraction, it is sinusoidal signal that photosensitive area 2.1 does with photosensitive area 2.2 signal of exporting after difference processing, photosensitive area 2.3 does with photosensitive area 2.4 signal of exporting after difference processing also becomes string signal, and phase phasic difference 90 degree of two output signals.When being read by the sinusoidal signal after the sinusoidal signal after photosensitive area 2.1, photosensitive area 2.2 difference processing or photosensitive area 2.3, photosensitive area 2.4 difference processing by 3 of signal processing circuit boards, can not make the anglec of rotation of individual pen absolute encoder dish 1 corresponding one by one with the signal of signal processing circuit board 3 identifications.But during the sinusoidal signal after the sinusoidal signal after signal processing circuit board 3 reads photosensitive area 2.1, photosensitive area 2.2 difference processing simultaneously and photosensitive area 2.3, photosensitive area 2.4 difference processing, signal processing circuit board 3 is by read two paths of signals simultaneously, just can make the anglec of rotation of individual pen absolute encoder dish 1 corresponding one by one with the signal of signal processing circuit board 3 identifications, at this moment individual pen absolute encoder dish 1 just can record each angle of turning axle.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosed in this manual, and the arbitrary new method disclosed or step or any new combination of process.
Claims (5)
1. an individual pen absolute encoder dish, it is characterized by described code-disc face and comprise outer ring code channel, inner ring code channel and some other code channels between inner ring and outer ring, and the rotation center of outer ring code channel and inner ring code channel does not overlap with the rotation center of code-disc.
2. a kind of individual pen absolute encoder dish according to claim 1, is characterized by described outer ring code channel and be comprised of two different concentric circles curves of radius.
3. a kind of individual pen absolute encoder dish according to claim 1, is characterized by described inner ring code channel and be comprised of two different concentric circles curves of radius.
4. according to the described a kind of individual pen absolute encoder dish of claim 2 or 3, it is characterized by the overlapping area of the light transmission part of described inner ring code channel and outer ring code channel and light sensor sensitization part according to sinusoidal variation.
5. a kind of individual pen absolute encoder dish according to claim 4, the sinusoidal curve phase place output that it is characterized by described inner ring code channel and outer ring code channel differs 90 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104315148A CN103471629A (en) | 2013-09-22 | 2013-09-22 | Single-ring absolute value coding disc |
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| CN2013104315148A CN103471629A (en) | 2013-09-22 | 2013-09-22 | Single-ring absolute value coding disc |
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| CN103471629A true CN103471629A (en) | 2013-12-25 |
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| CN2013104315148A Pending CN103471629A (en) | 2013-09-22 | 2013-09-22 | Single-ring absolute value coding disc |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248115A (en) * | 2016-09-19 | 2016-12-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Determine grating, dynamic grating and photoelectric encoder |
| CN106525090A (en) * | 2016-12-30 | 2017-03-22 | 横川机器人（深圳）有限公司 | Incremental coded disk with single-turn absolute value torque motor |
| CN106778990A (en) * | 2016-11-19 | 2017-05-31 | 哈尔滨理工大学 | Information coding structure based on circumferential arrangement step array |
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| CN1664508A (en) * | 2004-03-03 | 2005-09-07 | 郝双晖 | Coded disc |
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| CN102261927A (en) * | 2011-04-28 | 2011-11-30 | 南京中科天文仪器有限公司 | Single code channel grating encoder for outputting monocyclic position type sine wave signal |
| CN203464945U (en) * | 2013-09-22 | 2014-03-05 | 绵阳福德机器人有限责任公司 | Single-loop absolute value coding disc |
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2013
- 2013-09-22 CN CN2013104315148A patent/CN103471629A/en active Pending
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| JPH06235646A (en) * | 1993-07-27 | 1994-08-23 | Harmonic Drive Syst Ind Co Ltd | Rotary angle detector |
| US5734160A (en) * | 1996-05-17 | 1998-03-31 | Kia Motors Corporation | Automobile steering angle sensor with a humidity moving member and a spiral shape resistance body |
| CN1664508A (en) * | 2004-03-03 | 2005-09-07 | 郝双晖 | Coded disc |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248115A (en) * | 2016-09-19 | 2016-12-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Determine grating, dynamic grating and photoelectric encoder |
| CN106778990A (en) * | 2016-11-19 | 2017-05-31 | 哈尔滨理工大学 | Information coding structure based on circumferential arrangement step array |
| CN106778990B (en) * | 2016-11-19 | 2019-11-01 | 哈尔滨理工大学 | Information coding structure based on circumferential arrangement step array |
| CN106525090A (en) * | 2016-12-30 | 2017-03-22 | 横川机器人（深圳）有限公司 | Incremental coded disk with single-turn absolute value torque motor |
| CN106525090B (en) * | 2016-12-30 | 2019-05-31 | 横川机器人（深圳）有限公司 | A kind of band individual pen absolute value forces torque motor increment type coding disk |
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Application publication date: 20131225 |