CN209342121U - A kind of code-disc and encoder - Google Patents
A kind of code-disc and encoder Download PDFInfo
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- CN209342121U CN209342121U CN201822088124.6U CN201822088124U CN209342121U CN 209342121 U CN209342121 U CN 209342121U CN 201822088124 U CN201822088124 U CN 201822088124U CN 209342121 U CN209342121 U CN 209342121U
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Abstract
The utility model discloses a kind of code-disc and encoder, which includes: the code channel component encoded by the coding mode of setting, and corresponding with the code channel component determines grating；Wherein, the coding mode, the width of the absolute window for improving the code channel component.The embodiment of the utility model can solve the problem of leading to absolute signal windows narrow with the increase of increment code channel groove number and reduce the reliability of encoder, achieve the effect that the reliability for promoting encoder.
Description
Technical field
The utility model belongs to encoder techniques field, and in particular to a kind of code-disc and encoder, more particularly to it is a kind of absolutely
To the code-disc and photoelectric encoder of encoder.
Background technique
Photoelectric encoder be it is a kind of integrate light, mechanical, electrical angle-measuring equipment, pass through mechanical structure and signal processing circuit
Electric signal is converted optical signals into, to realize the direct or indirect survey of a variety of physical quantitys such as diagonal displacement, position and speed
Amount.
The coding mode of absolute encoder and determine grating as depicted in figs. 1 and 2 in the prior art, increment code channel is used to obtain
Cosine and sine signal improves encoder resolution further to segment；Absolute signal uses binary coding, to provide coding
The absolute position of device.Wherein the window width of absolute signal is a pitch P of increment signal, with increment code channel groove number
Increase, pitch P will be gradually reduced, and lead to absolute signal windows narrow, the sensitive volume of PD (photodiode array) is insufficient, signal
It exports unstability to reinforce, the per-word error probability of absolute signal greatly improves, and reduces the reliability of encoder.
Utility model content
The purpose of this utility model is that in view of the foregoing drawbacks, a kind of code-disc and encoder are provided, to solve the prior art
In the problem of leading to absolute signal windows narrow with the increase of increment code channel groove number and reduce the reliability of encoder, reach
To the effect for the reliability for promoting encoder.
The utility model provides a kind of code-disc, comprising: the code channel component encoded by the coding mode of setting, Yi Jiyu
The code channel component is corresponding to determine grating；Wherein, the coding mode, the width of the absolute window for improving the code channel component
Degree.
Optionally, the code channel component, comprising: more than one increment code channel and more than one absolute code channel；Wherein,
The groove of more than one described increment code channel and more than one absolute code channel uses uniformly distributed form, and light and dark.
Optionally, when the number of encoding bits N of the code-disc be 4 when, more than one increment code channel and it is more than one absolutely
Code channel, comprising: the first increment code channel, the second increment code channel, the absolute code channel of N-3 and the absolute code channel of N-4；Wherein, described
One increment code channel, the second increment code channel, the absolute code channel of the N-3 and the absolute code channel of N-4 groove using equal
The form of cloth, and it is light and dark.
Optionally, the groove period of the second increment code channel is M times of the first increment code channel, and the N-3 is exhausted
The groove period to code channel is 2M times of the first increment code channel, and the groove period of the absolute code channel of N-4 is described
4M times of one increment code channel；M is natural number.
Optionally, described to determine grating, comprising: more than one increment window and more than one absolute window；Wherein, one
A absolute window of the above, is distributed in the periphery of more than one increment window.
Optionally, when the number of encoding bits N of the code-disc be 4 when, more than one increment window and it is more than one absolutely
Window, comprising: the first increment window, the second increment window, the absolute window of N-3 and the absolute window of N-4；Wherein, described
One increment window splits the arrangement of phase method using 4 quadrants comprising 4 parts, generates A ,/A and B ,/B signal, for obtain sinusoidal signal and
Cosine signal；The second increment window generates 90 ° of phase phase difference of two two-way square waves comprising 90 ° two parts of phase shifting
Signal, for generating the 1st and the 2nd of absolute signal；The absolute window of N-3 and the absolute window of N-4, are used for
Generate the 3rd and the 4th of absolute signal.
Optionally, wherein the window width of the second increment window is P times of the first increment window, and P is nature
Number；And/or the window width of the N-3 absolute window and the absolute window of N-4, it is the first increment window
2P times；P is natural number.
Match with above-mentioned code-disc, the utility model another further aspect provides a kind of encoder, comprising: encoder body；Also
It include: above-described code-disc.
Optionally, further includes: LED, photosensitive unit and signal processing circuit；Wherein, the encoder body, the code
Disk, the LED, the photosensitive unit and the signal processing circuit constitute photoelectric encoder.
The embodiment of the utility model, by the width for improving absolute window, it is ensured that the sensitive volume of PD improves absolutely letter
Number stability, guarantee encoder reliability in application process.
Further, the embodiment of the utility model, by improving the width of absolute window, in the identical premise of encoder digit
Under, the code channel number of grating can be reduced, conducive to the miniaturization of encoder.
The embodiment of the utility model as a result, by the width for improving absolute window, it is ensured that the sensitive volume of PD solves
In the prior art as the increase of increment code channel groove number leads to absolute signal windows narrow and reduces the reliability of encoder
(such as: the window width of absolute signal be increment signal a pitch P, with increment code channel groove number increase pitch P gradually
Reduce and lead to absolute signal windows narrow, reduce the reliability of encoder) the problem of, thus, overcome in the prior art absolutely
Defect narrow to window width, absolute signal stability difference is low with the reliability of encoder, realizes that absolute window width is wide, absolute
Signal stabilization is good and the beneficial effect of the high reliablity of encoder.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the coding mode of existing code-disc (such as: the code-disc of absolute encoder)；
Fig. 2 is the structural schematic diagram that existing code-disc (such as: the code-disc of absolute encoder) determines grating；
Fig. 3 is the structure of the coding mode of an embodiment of the code-disc (such as: the code-disc of absolute encoder) of the utility model
Schematic diagram；
Fig. 4 is that an embodiment of the code-disc (such as: the code-disc of absolute encoder) of the utility model determines the structural representation of grating
Figure；
Fig. 5 is the waveform of the output signal of an embodiment of the code-disc (such as: the code-disc of absolute encoder) of the utility model
Schematic diagram.
Specific embodiment
It is specific below in conjunction with the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Technical solutions of the utility model are clearly and completely described in embodiment and corresponding attached drawing.Obviously, described embodiment
It is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without making creative work, belongs to the utility model
The range of protection.
Embodiment according to the present utility model provides a kind of code-disc (such as: the code-disc of absolute encoder).Referring to Fig. 3 institute
Show the structural schematic diagram of an embodiment of the code-disc of the utility model.The code-disc may include: to encode by the coding mode of setting
Obtained code channel component, and corresponding with the code channel component determine grating.
Wherein, the coding mode can be used for improving the width of the absolute window of the code channel component.
Such as: a kind of encoder coding mode and it is corresponding determine grating, to improve the width of absolute window, guarantee the sense of PD
Light quantity improves the stability of absolute signal, guarantees the reliability of encoder in application process；Meanwhile in encoder digit phase
With under the premise of, the code channel number of grating can be reduced, conducive to the miniaturization of encoder.
Required code channel group is obtained by the coding mode of the width by the absolute window for improving the code channel component as a result,
Part, and obtain that code channel component is corresponding determines grating with this, the width of absolute window can be improved, to improve the steady of absolute signal
It is qualitative, guarantee the reliability of encoder in application process.
In an optional example, the code channel component may include: more than one increment code channel and more than one
Absolute code channel.
Wherein, more than one described increment code channel and more than one described absolute code channel set gradually (as from up to down according to
Secondary setting is set gradually from left to right), also, more than one described increment code channel and more than one absolute code channel
Groove uses uniformly distributed form, and light and dark.
As a result, by code channel component, making the groove of increment code channel and absolute code channel uniformly distributed and light and dark, favorably
In the width for improving absolute window, guarantees the sensitive volume of PD, improve the stability of absolute signal.
Optionally, when the number of encoding bits N of the code-disc is 4 (N is natural number), more than one increment code channel and one
Above absolute code channel, may include: the first increment code channel (such as increment code channel 1), the second increment code channel (such as increment code channel 2),
The absolute code channel of N-3 (such as absolute code channel N-3) and the absolute code channel of N-4 (such as absolute code channel N-4).
Wherein, the first increment code channel, the second increment code channel, the absolute code channel of the N-3 and the N-4 are exhausted
Uniformly distributed form is used to the groove of code channel, and light and dark.
Such as: encoder coding mode principle as shown in figure 3, by increment code channel 1, increment code channel 2, absolute code channel N-3, absolutely
Code channel N-4 is formed.It is corresponding to determine grating as shown in figure 4, by 1 window of increment, 2 window of increment, absolute N-3 window, absolute N-4
Window composition.Wherein, the increment code channel 1, increment code channel 2, absolute code channel N-3, absolute code channel N-4, groove is using uniformly distributed
Form, and it is light and dark.Wherein, N is the digit of binary coder.
Groove as a result, by increment code channel and absolute code channel when in code channel component, making number of encoding bits N 4 is uniformly distributed,
And it is light and dark, be conducive to the width for improving absolute window, guarantee the sensitive volume of PD, improves the stability of absolute signal.
More optionally, the groove period of the second increment code channel is M times of the first increment code channel, the N-3
The groove period of absolute code channel is 2M times of the first increment code channel, and the groove period of the absolute code channel of N-4 is described
4M times of first increment code channel；M is natural number.
Such as: the groove period of increment code channel 2 is 4 times of increment code channel 1, and the groove period of absolute code channel N-3 is increment
8 times of code channel 1, the groove period of absolute code channel N-4 are 16 times of increment code channel 1.
As a result, by code channel component, when number of encoding bits N is 4, using the groove period of the first increment code channel as base
The groove cycle set of other increment code channels and absolute code channel is the setting multiple of the benchmark, is conducive to promote absolute window by standard
The width of mouth, improves the stability of encoder.
It is described to determine grating in an optional example, may include: more than one increment window and it is more than one absolutely
To window.
Wherein, more than one described absolute window, is distributed in the periphery of more than one increment window.
As a result, by making absolute window be distributed in the periphery of increment window in determining grating, be conducive to improve absolute signal
Width, guarantee the sensitive volume of PD.
Optionally, when the number of encoding bits N of the code-disc is 4 (N is natural number), more than one increment window and one
Above absolute window, may include: the first increment window (such as 1 window of increment), the second increment window (such as 2 window of increment),
The absolute window of N-3 (such as absolute N-3 window) and the absolute window of N-4 (such as absolute N-4 window).
Specifically, the first increment window splits the arrangement of phase method using 4 quadrants comprising 4 parts, generates A ,/A and B ,/B letter
Number, sinusoidal signal and cosine signal are obtained after the signal processing that can be used for being set.
Such as: 1 window of increment splits the arrangement of phase method using 4 quadrants comprising 4 parts, generates A ,/A and B ,/B signal, warp
Subsequent conditioning circuit processing obtains sinusoidal signal and cosine signal, and waveform is segmented as shown in A, B in Fig. 5 for signal, to improve coding
Device resolution ratio.
Specifically, the second increment window generates 90 ° of phase phase difference two-by-two comprising 90 ° two parts of phase shifting
Road square-wave signal generates the 1st and the 2nd of absolute signal after the calculation processing that can be used for being set.
Such as: 2 window of increment, window width are 4 times of 1 window of increment, include two of 90 ° of phase shifting
Point, 90 ° of phase phase difference of 2 two-way square-wave signals are generated, waveform, by calculating, generates absolute signal as shown in C, D in Fig. 5
1,2.
Specifically, the absolute window of the N-3 and the absolute window of N-4, can be used for generating the 3rd of absolute signal
Position and the 4th.
Such as: the absolute N-3 window and absolute N-4 window, window width is 8 times of 1 window of increment, for generating
3,4 of absolute signal, waveform is as shown in E, F in Fig. 5.In Fig. 5, by CDEF formed absolute coding be 1111,1110,
1100,1101,1011,1010,1000,1001,0111,0110,0100,0101,0011,0010,0000,0001, amount to 16
It is a and without repeat, reach 4 coding purposes.
As a result, by way of increment window and absolute window generation signal are arranged in determining grating, be conducive to be promoted exhausted
To the stability of signal.
More optionally, the window width of the second increment window is P times of the first increment window, and P is natural number；
And/or the window width of the N-3 absolute window and the absolute window of N-4, it is the 2P of the first increment window
Times；P is natural number.
As a result, by determining grating, when number of encoding bits N is 4, on the basis of the window width of the first increment window,
The window width of other increment windows and absolute window is set as to the setting multiple of the benchmark, is conducive to promote absolute window
Width improves the stability of encoder.
It,, can be with by improving the width of absolute window using the technical solution of the utility model through a large amount of verification experimental verification
The sensitive volume for guaranteeing PD improves the stability of absolute signal, guarantees the reliability of encoder in application process.
Embodiment according to the present utility model additionally provides a kind of encoder corresponding to code-disc.The encoder, can wrap
It includes: encoder body.It can also include: above-described code-disc.
It optionally, can also include: LED, photosensitive unit and signal processing circuit.
Wherein, the encoder body, the code-disc, the LED, the photosensitive unit and the signal processing circuit,
Constitute photoelectric encoder.
Such as: a kind of photoelectric encoder may include: structural body, LED, photosensitive unit, signal processing circuit, code-disc；Its
It is characterized in that, using above-mentioned coding mode and to determining grating.
Wherein, structural body is the body construction of encoder, may include: axis, bracket, bearing, nut etc..
Required code channel group is obtained by the coding mode of the width by the absolute window for improving the code channel component as a result,
Part, and obtain that code channel component is corresponding determines grating with this, the width of absolute window can be improved, to improve the steady of absolute signal
It is qualitative, guarantee the reliability of photoelectric encoder in application process.
In an optional embodiment, to solve to cause absolute signal window to become with the increase of increment code channel groove number
The problem of reliability that is narrow and reducing encoder, the embodiment of the utility model propose a kind of encoder coding mode and correspondence
Determine grating, to improve the width of absolute window, guarantee the sensitive volume of PD, improve the stability of absolute signal, guarantee encoder
Reliability in application process；Meanwhile under the premise of encoder digit is identical, the code channel number of grating can be reduced, is conducive to
The miniaturization of encoder.
In an optional example, the embodiment of the utility model proposes a kind of encoder coding mode and corresponding determines light
Grid guarantee the sensitive volume of PD to improve the width of absolute window, improve the stability of absolute signal, guarantee that encoder is being applied
Reliability in the process；Meanwhile under the premise of encoder digit is identical, the code channel number of grating can be reduced, is conducive to encoder
Miniaturization.
Optionally, the embodiment of the utility model proposes double increment code channel coding modes of a kind of absolute encoder and corresponding
Determine grating, the width of absolute window can be effectively ensured, improve the sensitive volume of PD, ensure that the stability of absolute signal, increases
The strong reliability of encoder in application process；Meanwhile under the premise of encoder digit is identical, the code channel number of grating can be with
1 is reduced, conducive to the miniaturization of encoder.
As it can be seen that the utility model proposes a kind of encoder coding mode and it is corresponding determine grating, absolute window can be improved
Width, guarantee the sensitive volume of PD, solve the problems, such as that the absolute window of photoelectric encoder is underexposed；Improve the stabilization of absolute signal
Property, it solves the problems, such as photoelectric encoder absolute signal unstability in application process, guarantees encoder in application process
Reliability；Meanwhile under the premise of encoder digit is identical, the code channel number of grating can be reduced, conducive to the miniaturization of encoder,
Solve photoelectric encoder miniaturization issues.
In an optional specific embodiment, Fig. 3 may refer to example shown in fig. 5, to the side of the utility model
The specific implementation process of case illustrates.
To be illustrated by taking N=4 as an example in the embodiment of the utility model convenient for stating.
In an optional specific example, in the embodiment of the utility model, encoder coding mode principle as shown in figure 3,
It is made of increment code channel 1, increment code channel 2, absolute code channel N-3, absolute code channel N-4.It is corresponding to determine grating as shown in figure 4, by increasing
Measure 1 window, 2 window of increment, absolute N-3 window, absolute N-4 window composition.
Optionally, the increment code channel 1, increment code channel 2, absolute code channel N-3, absolute code channel N-4, groove is using uniformly distributed
Form, and it is light and dark.
Wherein the groove period of increment code channel 2 is 4 times of increment code channel 1, and the groove period of absolute code channel N-3 is incremental code
8 times of road 1, the groove period of absolute code channel N-4 are 16 times of increment code channel 1.Wherein, which can be fixed value, not root
It is changed according to the value of N.
Optionally, 1 window of increment splits the arrangement of phase method using 4 quadrants comprising 4 parts, generates A ,/A and B ,/B signal,
It is handled through subsequent conditioning circuit, obtains sinusoidal signal and cosine signal, waveform is segmented as shown in A, B in Fig. 5 for signal, is compiled with improving
Code device resolution ratio.
Wherein, subsequent processing may include: signal condition, signal amplification and signal filtering processing etc..
Optionally, 2 window of increment, window width are 4 times of 1 window of increment, include two of 90 ° of phase shifting
Point, 90 ° of phase phase difference of 2 two-way square-wave signals are generated, waveform, by calculating, generates absolute signal as shown in C, D in Fig. 5
1,2.
Optionally, the absolute N-3 window and absolute N-4 window, window width is 8 times of 1 window of increment, for producing
3,4 of raw absolute signal, waveform is as shown in E, F in Fig. 5.
In Fig. 5, by CDEF formed absolute coding be 1111,1110,1100,1101,1011,1010,1000,
1001,0111,0110,0100,0101,0011,0010,0000,0001, amount to 16 and without repeat, reach 4 coding mesh
's.
By comparison, using the encoder of above-mentioned coding mode, absolute window width is the 4 of the absolute window of the prior art
Times, the sensitive volume of PD is improved, ensure that the stability of absolute signal, enhances the reliability of encoder in application process；
Meanwhile under the premise of encoder digit is identical, the code channel number of grating can reduce 1, conducive to the miniaturization of encoder.
The processing and function realized by the encoder of the present embodiment essentially correspond to earlier figures 3 to code shown in fig. 5
Embodiment, principle and the example of disk, therefore not detailed place in the description of the present embodiment, may refer to the correlation in previous embodiment
Illustrate, this will not be repeated here.
Through a large amount of verification experimental verification, compiled using the technical solution of the utility model by improving the width of absolute window
Under the premise of code device digit is identical, the code channel number of grating can be reduced, conducive to the miniaturization of encoder.
To sum up, it will be readily appreciated by those skilled in the art that under the premise of not conflicting, above-mentioned each advantageous manner can be certainly
It combined, be superimposed by ground.
The above description is only the embodiments of the present invention, is not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of the claims of the utility model.
Claims (8)
1. a kind of code-disc characterized by comprising the code channel component encoded by the coding mode of setting, and with it is described
Code channel component is corresponding to determine grating；
Wherein, the coding mode, the width of the absolute window for improving the code channel component；
The code channel component, comprising: more than one increment code channel and more than one absolute code channel；Wherein,
The groove of more than one described increment code channel and more than one absolute code channel uses uniformly distributed form, and light and shade phase
Between.
2. code-disc according to claim 1, which is characterized in that when the number of encoding bits N of the code-disc is 4, more than one
Increment code channel and more than one absolute code channel, comprising: the first increment code channel, the second increment code channel, the absolute code channel of N-3 and
The absolute code channel of N-4；Wherein,
The first increment code channel, the second increment code channel, the absolute code channel of the N-3 and the absolute code channel of N-4
Groove uses uniformly distributed form, and light and dark.
3. code-disc according to claim 2, which is characterized in that the groove period of the second increment code channel is described first
M times of increment code channel, the groove period of the absolute code channel of N-3 are 2M times of the first increment code channel, and the N-4 is exhausted
The groove period to code channel is 4M times of the first increment code channel；M is natural number.
4. code-disc described in one of -3 according to claim 1, which is characterized in that described to determine grating, comprising: more than one increment
Window and more than one absolute window；Wherein,
More than one described absolute window, is distributed in the periphery of more than one increment window.
5. code-disc according to claim 4, which is characterized in that when the number of encoding bits N of the code-disc is 4, more than one
Increment window and more than one absolute window, comprising: the first increment window, the second increment window, the absolute window of N-3 and
The absolute window of N-4；Wherein,
The first increment window splits the arrangement of phase method using 4 quadrants comprising 4 parts, A ,/A and B ,/B signal is generated, for obtaining
Sinusoidal signal and cosine signal；
The second increment window generates 90 ° of phase phase difference of two two-way square-wave signals comprising 90 ° two parts of phase shifting,
For generating the 1st and the 2nd of absolute signal；
The absolute window of N-3 and the absolute window of N-4, for generating the 3rd and the 4th of absolute signal.
6. code-disc according to claim 5, which is characterized in that wherein,
The window width of the second increment window is P times of the first increment window, and P is natural number；
And/or
The window width of the N-3 absolute window and the absolute window of N-4, is 2P times of the first increment window；P
For natural number.
7. a kind of encoder characterized by comprising encoder body；Further include: the code as described in claim 1 to 6 is any
Disk.
8. encoder according to claim 7, which is characterized in that further include: LED, photosensitive unit and signal processing circuit；
Wherein,
The encoder body, the code-disc, the LED, the photosensitive unit and the signal processing circuit constitute photoelectricity and compile
Code device.
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| CN201822088124.6U CN209342121U (en) | 2018-12-12 | 2018-12-12 | A kind of code-disc and encoder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443402A (en) * | 2018-12-12 | 2019-03-08 | 珠海格力电器股份有限公司 | A kind of code-disc and encoder |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443402A (en) * | 2018-12-12 | 2019-03-08 | 珠海格力电器股份有限公司 | A kind of code-disc and encoder |
| CN109443402B (en) * | 2018-12-12 | 2024-04-05 | 珠海格力电器股份有限公司 | Code wheel and encoder |
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