CN208012624U - Photoelectric encoder and dynamic grating - Google Patents
Photoelectric encoder and dynamic grating Download PDFInfo
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- CN208012624U CN208012624U CN201820314125.5U CN201820314125U CN208012624U CN 208012624 U CN208012624 U CN 208012624U CN 201820314125 U CN201820314125 U CN 201820314125U CN 208012624 U CN208012624 U CN 208012624U
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Abstract
The utility model discloses a kind of photoelectric encoders and dynamic grating.Wherein, which includes：Structure, signal processor, light source, photoreceptor move grating and determine grating, wherein the width ratio of bright, the dark pane of dynamic grating is 1：N, wherein N is the numerical value more than 1.The source signal sine that the utility model solves photoelectric encoder is poor, the technical issues of being unfavorable for high-precision fine.
Description
Technical field
The utility model is related to field of industrial measurement, in particular to a kind of photoelectric encoder and dynamic grating.
Background technology
Photoelectric encoder be it is a kind of integrating optics, machinery, angle-measuring equipment electrically, pass through mechanical structure and signal
Processing circuit converts optical signals into electric signal, to realize the direct of a variety of physical quantitys such as diagonal displacement, speed and position
Or it measures indirectly.
In absolute optical encoder, by move grating rotating absolute coding can realize rotation turn around in each angle
The coding of degree is all unique.In order to make photoelectric encoder while meet high-resolution and the small requirement of size, electronics must be passed through
The mode of subdivision handles signal.And the source signal that electronic fine-grained middle needs are used is electronic fine-grained foundation stone.Source signal
Generation depend on dynamic grating and determine the design of grating.Fig. 1 is a kind of design signal of dynamic grating of the relevant technologies
Figure, as shown in Figure 1, the width design of bright, dark pane is 1 in increment code channel on code-disc：1, the dynamic grating of this design and determine light
The sine of source signal is not fine caused by grid cooperation, is unfavorable for high-precision subdivision.
For above-mentioned problem, currently no effective solution has been proposed.
Utility model content
The utility model embodiment provides a kind of photoelectric encoder and dynamic grating, at least to solve the source of photoelectric encoder
Signal sine is poor, the technical issues of being unfavorable for high-precision fine.
According to the one side of the utility model embodiment, a kind of photoelectric encoder is provided, including：Structure, signal
Processor, light source, photoreceptor move grating and determine grating, wherein the width ratio of bright, the dark pane of the dynamic grating is 1：N,
Wherein, N is the numerical value more than 1.
Optionally, N is the natural number more than 1.
Optionally, the value of N is 2.
Optionally, bright, the dark pane for determining grating is arranged at dislocation respectively.
Optionally, the dislocation arrangement is radial step arrangement.
Optionally, the shape of bright, the dark pane for determining grating is identical rectangle.
Optionally, the material of the dynamic grating is optical glass.
According to the another aspect of the utility model embodiment, a kind of dynamic grating is additionally provided, is applied in photoelectric encoder,
Including：The width ratio of bright, the dark pane of the dynamic grating is 1：N, wherein N is the numerical value more than 1.
Optionally, the value of N is 2.
Optionally, the material of the dynamic grating is optical glass.
In the utility model embodiment, by the way of the design that grating is moved in adjustment, set in photoelectric encoder
Set structure, signal processor, light source, photoreceptor dynamic grating and determines grating, wherein the width ratio of bright, the dark pane of dynamic grating
Example is 1：N, wherein N is the numerical value more than 1.Photoelectric encoder in the utility model embodiment has reached the source signal generated
The better purpose of sine to realize the technique effect for improving photoelectric encoder subdivision accuracy, and then solves photoelectricity volume
The source signal sine of code device is poor, the technical issues of being unfavorable for high-precision fine.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings：
Fig. 1 is a kind of design schematic diagram of dynamic grating of the relevant technologies；
Fig. 2 is the structural schematic diagram according to the photoelectric encoder 10 of the utility model embodiment；
Fig. 3 is the structural schematic diagram according to the dynamic grating 15 of the photoelectric encoder 10 of the utility model preferred embodiment；
Fig. 4 is the structural schematic diagram for determining grating 16 according to the photoelectric encoder 10 of the utility model preferred embodiment；
Fig. 5 is the light transmission capacity schematic diagram according to the photoelectric encoder 10 of the utility model preferred embodiment.
Specific implementation mode
In order to make those skilled in the art more fully understand the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered
When the range for belonging to the utility model protection.
It should be noted that term " first " in the specification and claims of the utility model and above-mentioned attached drawing,
" second " etc. is for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that in this way
The data used can be interchanged in the appropriate case, so that the embodiments of the present invention described herein can be in addition at this
In illustrate or description those of other than sequence implement.In addition, term " comprising " and " having " and their any deformation, meaning
It includes to be not necessarily limited to clearly for example, containing a series of system of modules or unit, product or equipment that figure, which is to cover non-exclusive,
Module or unit those of are listed to Chu, but may include not listing clearly or intrinsic for these products or equipment
Other modules or unit.
According to the one side of the utility model embodiment, a kind of photoelectric encoder is provided, Fig. 2 is new according to this practicality
The structural schematic diagram of the photoelectric encoder 10 of type embodiment, as shown in Fig. 2, the photoelectric encoder 10 includes：Structure 11, signal
Processor 12, light source 13, photoreceptor 14 move grating 15 and determine grating 16.
Wherein, grating 15 is moved, grating 16 is determined, light source 13 and photoreceptor 14 are arranged on structure 11, signal processor 12
It is connected with photoreceptor 14.And it moves the center of circle of grating 15 and determines the center of circle of grating 16 on same axis.
Wherein, the width ratio for moving bright, the dark pane of grating 15 is 1：N, N are the numerical value more than 1.Because in the related technology,
The width design of bright, dark pane is 1 in the design of dynamic grating：1, though the source signal that this design generates has certain sine
Property, but sine and bad, are unfavorable for high-precision subdivision.Use state clearly, the width ratio of dark pane is 1：The design side of N
Formula, N are the numerical value more than 1, can effectively adjust the sine of the source signal of photoelectric encoder generation, are realized high-precision thin
Point.The value of N can be adjusted correspondingly according to the application environment and testing requirements of photoelectric encoder.
Wherein, above-mentioned N can be the natural number more than 1, or be more than 1 decimal, according to the convenience of manufacture craft
It is required that optionally, N can be the natural number more than 1.
Preferably, the value of N can be 2.By dependence test, the width ratio of bright, the dark pane of above-mentioned dynamic grating 15
It is 1：When 2, in the rotary course of dynamic grating 15, optical signal can realize light quantity closest to sinusoidal signal through grating 16 is determined
Output, and then make source signal sine realize full accuracy subdivision.
To eliminate disadvantage of the increment code channel for determining grating 16 in the related technology using source signal difference caused by radial rectangular configuration
End, determining bright, the dark pane of grating 16 can arrange at dislocation respectively.The bright pane of grating 16 is determined into the design of dislocation arrangement
Mode, while dark pane is also at the design method of dislocation arrangement.Wherein, determining the shape of bright, the dark pane of grating 16 can be
Identical shape, such as rectangle, square, parallelogram.Preferably, the shape for determining bright, the dark pane of grating 16 is rectangle.
Preferably, above-mentioned dislocation arrangement is radial step arrangement.Wherein, the identical rectangular shapes and sizes of number of plies M are preset
Bright, dark pane be arranged above and below the arrangement mode of radially step arrangement.Wherein, the value of M can be according to photoelectric encoder
Application environment and testing requirements are adjusted correspondingly.
Determine grating 16 using by above-mentioned design method, photoelectric encoder 10 can be made in the rotary course of dynamic grating 15
In, optical signal transmission, which determines grating 16, can realize the output close to the light quantity of sinusoidal signal, and then keep the sine of source signal real
The subdivision of existing degree of precision.
Wherein, move grating 15 and determine grating 16 material can there are many, be not specifically limited herein.According to optical glass
Excellent translucency and other physical characteristics, it is preferred that the material of dynamic grating 15 can be optical glass.
According to the other side of the utility model embodiment, a kind of preferred implementation side of photoelectric encoder 10 is additionally provided
Case, Fig. 3 are according to the structural schematic diagram of the dynamic grating 15 of the photoelectric encoder 10 of the utility model preferred embodiment, and Fig. 4 is
According to the structural schematic diagram for determining grating 16 of the photoelectric encoder 10 of the utility model preferred embodiment.
Wherein, it moves grating 15 and determines to include a plurality of absolute code channel and increment code channel in grating 16, wherein absolute code channel
Item number is X, and X is more than 1；The item number of increment code channel is Y, and Y is more than or equal to 1.It moves grating 15 and determines absolute code channel and increasing in grating 16
The item number difference for measuring code channel is identical, and each code channel corresponds.
As shown in Figure 3 and Figure 4, bright, dark pane in the first increment code channel of the dynamic grating 15 in the photoelectric encoder 10
Width ratio is 1：2, the sum of width of each group of bright, dark pane is (360/2X) angle；Determine the second incremental code of grating 16
Have that the rectangle for the same shape and size that the number of plies is 4 is bright, dark pane in road, wherein above state clearly, dark pane is arranged above and below composition diameter
To the step arrangement of dislocation type.Wherein, the first increment code channel is corresponding with the second increment code channel.
Above-mentioned first increment code channel and the second increment code channel often rotate a list for generating sinusoidal signal in dynamic grating 15
The angle of position generates an absolute coding, wherein the angle of said one unit is each in 15 first increment code channel of dynamic grating
The sum of the width of bright, the dark pane of group, i.e., (360/2X) angle value.And then dynamic grating 15 is for each revolution, i.e., it, can at 360 degree
To generate 2XA absolute coding, wherein each absolute coding is all different.And in 15 rotary course of dynamic grating, each is absolutely
The sinusoidal signal of the corresponding a cycle of coding.
Because above-mentioned absolute coding indicates that each coding does not repeat, thus dynamic grating 15 for each revolution, the inside generation
Each coding is unique.
In 10 operational process of photoelectric encoder, it is fixed to determine grating 16, moves grating 15 and is mounted on motor shaft, with electricity
Machine rotates together along a fixed-direction.In the rotary course of dynamic grating 15, the optical signal that light source 13 provides is through dynamic grating 15
It can realize what light transmission capacity elder generation gradually incrementally gradually successively decreased again with the first increment code channel and the second increment code channel determined in grating 16
The output of the light quantity of near sinusoidal signal form.Fig. 5 is the light transmission capacity according to the photoelectric encoder 10 of the utility model embodiment
Schematic diagram, as shown in figure 5, in the rotary course of dynamic grating 15, during turning over one of unit angle, first increases
Amount code channel and the situation of change for the light transmission capacity that the second increment code channel generates are as shown in Table 1 below：
| 1 | 2 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Table 1
Wherein, it 1 represents and determine in second increment code channel of grating 16 1 bright pane transmission in the pane of each row step arrangement
Light quantity, 2 represent the light quantity that 2 bright panes penetrate, remaining number can be with the rest may be inferred.Because having 4 layers of rank in the second increment code channel
The pane of ladder arrangement, therefore maximum transmission amount is 4 in table 1.In Fig. 5, abscissa is the angle that dynamic grating 15 rotates, and ordinate is more
The summation for the light transmission capacity that group increment code channel generates.
Because sinusoidal signal is electronic fine-grained foundation stone, sinusoidal signal can be handled by interpolation algorithm, to reach
Improve the purpose of photoelectric encoder resolution ratio.Therefore in the utility model embodiment, by moving grating 15 and determining the spy of grating 16
The combination very designed so that the sine for the light quantity that photoreceptor 14 receives in photoelectric encoder 10 is more preferable.
Width design because in the related technology, moving bright, dark pane in the increment code channel of grating is 1：1, meanwhile, determine grating
Increment code channel use also for radial rectangular configuration, therefore the output for the light quantity that its realization is triangular wave patterns.And this practicality is new
The sinusoidal signal generated in type embodiment is more advantageous to high-precision subdivision than triangular signal.Therefore photoelectric encoder 10 can be same
When meet high-resolution and the small requirement of size.
According to the other side of the utility model embodiment, a kind of dynamic grating is additionally provided, wherein above-mentioned dynamic grating
The width ratio of bright, dark pane is 1：N, wherein N is the numerical value more than 1.
Width design because in the related technology, moving bright, dark pane in the design of grating is 1：1, this design generates
Source signal be mostly triangular wave, though have certain sine, sine is simultaneously bad, is unfavorable for high-precision subdivision.Using upper
It states clearly, the width ratio of dark pane is 1：The design method of N can effectively adjust the sine of the source signal of photoelectric encoder generation
Property.Wherein, above-mentioned N can be natural number, or decimal.The value of N can according to the application environment of photoelectric encoder and
Testing requirements are adjusted correspondingly.
Facilitate requirement according to manufacture craft, it is preferred that the value of N can be 2.By dependence test, above-mentioned dynamic grating
Bright, dark pane width ratio be 1：When 2, in the rotary course of dynamic grating, optical signal is through corresponding with dynamic grating fixed
When grating, the output closest to the light quantity of sinusoidal signal can be realized, and then the sine of source signal is made to realize full accuracy
Subdivision.
Wherein, move grating material can there are many, here, being not specifically limited.According to the light transmission that optical glass is excellent
Property and other physical characteristics, it is preferred that the material of dynamic grating can be optical glass.
Above-mentioned the utility model embodiment serial number is for illustration only, can not represent the quality of embodiment.
In above-described embodiment of the utility model, all emphasize particularly on different fields to the description of each embodiment, in some embodiment
The part not being described in detail may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, for example, the unit division, Ke Yiwei
A kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
It connects, can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
On unit.Some or all of unit therein can be selected according to the actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing unit,
Can be that each unit physically exists alone, it can also be during two or more units be integrated in one unit.It is above-mentioned integrated
Unit both may be used hardware form realize, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, the technical solution of the utility model sheet
The all or part of the part that contributes to existing technology or the technical solution can be with software product in other words in matter
Form embodies, which is stored in a storage medium, including some instructions are used so that a meter
It calculates machine equipment (can be personal computer, server or network equipment etc.) and executes each embodiment the method for the utility model
All or part of step.And storage medium above-mentioned includes：USB flash disk, read-only memory (ROM, Read-Only Memory), with
Machine access memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can to store journey
The medium of sequence code.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of photoelectric encoder, which is characterized in that including：Structure, signal processor, light source, photoreceptor move grating and determine
Grating, wherein
The width ratio of bright, the dark pane of the dynamic grating is 1：N, wherein N is the numerical value more than 1.
2. photoelectric encoder according to claim 1, which is characterized in that N is the natural number more than 1.
3. photoelectric encoder according to claim 2, which is characterized in that the value of N is 2.
4. photoelectric encoder according to any one of claim 1 to 3, which is characterized in that bright, the dark window for determining grating
Lattice are arranged at dislocation respectively.
5. photoelectric encoder according to claim 4, which is characterized in that the dislocation arrangement is radial step arrangement.
6. photoelectric encoder according to claim 4, which is characterized in that the shape of bright, the dark pane for determining grating is equal
For identical rectangle.
7. photoelectric encoder according to claim 3, which is characterized in that the material of the dynamic grating is optical glass.
8. a kind of dynamic grating, which is characterized in that be applied in photoelectric encoder, the width ratio of bright, the dark pane of the dynamic grating
Example is 1：N, wherein N is the numerical value more than 1.
9. dynamic grating according to claim 8, which is characterized in that the value of N is 2.
10. dynamic grating according to claim 8 or claim 9, which is characterized in that the material of the dynamic grating is optical glass.
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| CN201820314125.5U CN208012624U (en) | 2018-03-07 | 2018-03-07 | Photoelectric encoder and dynamic grating |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534810A (en) * | 2018-03-07 | 2018-09-14 | 珠海格力节能环保制冷技术研究中心有限公司 | Photoelectric encoder and dynamic grating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534810A (en) * | 2018-03-07 | 2018-09-14 | 珠海格力节能环保制冷技术研究中心有限公司 | Photoelectric encoder and dynamic grating |
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