CN206974374U - A kind of simple absolute circle grating scale - Google Patents
A kind of simple absolute circle grating scale Download PDFInfo
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- CN206974374U CN206974374U CN201720770619.XU CN201720770619U CN206974374U CN 206974374 U CN206974374 U CN 206974374U CN 201720770619 U CN201720770619 U CN 201720770619U CN 206974374 U CN206974374 U CN 206974374U
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Abstract
The utility model discloses a kind of simple absolute circle grating scale, it is characterized in that, including the incremental encoding disk in annular shape and ring-type positioned at the incremental encoding disk and the absolute coding disk that is integrated with the incremental encoding disk, the incremental encoding disk has same pivot with the absolute coding disk；Also include to produce the grating reading head with the pulse train corresponding to the anglec of rotation of the incremental encoding disk and counting, and the anglec of rotation of the absolute coding disk to be converted to the photoelectric sensor of electric signal；Also include the display device that current absolute location can be obtained by electric signal caused by the grating reading head and the photoelectric sensor.Above-mentioned Circular gratings chi, when barrier turns back in power down or for some reason, the electric signal exported using the absolute coding part of Circular gratings chi can know its actual position value, so as to avoid the back to zero of increment type grating scale from operating.
Description
Technical field
Grating scale technical field is the utility model is related to, more particularly to a kind of simple absolute circle grating scale.
Background technology
In accurate measurement, Circular gratings chi, using the optical principle of grating, is substantially carried out displacement of the lines as important instrument
With the measurement of angular displacement.
Mainly in the manufacture of grating, the quality of grating directly influences whether to examine the key technology and difficult point of Circular gratings chi
Survey the precision and reliability of result.Existing Circular gratings chi mainly has glass Circular gratings chi and round metal grating scale, and its form has
Two kinds of increment type Circular gratings chi and absolute type Circular gratings chi.
Wherein, increment type Circular gratings chi needs to refer to signal (relative zero), and the operation of reference point back to zero must be performed when upper electric.
After power down, grating scale must back to zero again so that equipment is unable to recovery operation.In addition, in excessive velocities, pulse can be produced
Dropout and influence accuracy.However, one fixed code channel of each position correspondence of absolute type Circular gratings chi, measurement are shown
Value is only relevant with the starting of measurement and the position of termination, unrelated with middle measurement process, can also recover current location after power down,
Anti-interference is good.But absolute grating scale coding is complicated, manufacturing cost is high, and reading speed is slow, it is necessary to corresponding scale of arranging in pairs or groups
Grating, its measurement accuracy and the precision of scale grating have much relations, therefore in high-acruracy survey, will to scale grating line
Ask very high, so as to add processing cost.
Utility model content
The purpose of this utility model is to provide a kind of simple absolute circle grating scale, and the Circular gratings chi hinders in power down or for some reason
When turning back on, the electric signal exported using the absolute coding part of Circular gratings chi can know its actual position value, so as to avoid
The back to zero operation of increment type grating scale.
To achieve the above object, the utility model provides a kind of simple absolute circle grating scale,
Including the incremental encoding disk in annular shape and ring-type positioned at the incremental encoding disk and with the incremental encoding
The absolute coding disk that disk is integrated, the incremental encoding disk have same pivot with the absolute coding disk；
Also include to produce the grating with the pulse train corresponding to the anglec of rotation of the incremental encoding disk and counting
Reading head, and the anglec of rotation of the absolute coding disk to be converted to the photoelectric sensor of electric signal；
Also including can be current exhausted by electric signal acquisition caused by the grating reading head and the photoelectric sensor
To the display device of position.
Relative to above-mentioned background technology, simple absolute circle grating scale provided by the utility model, including the increasing in annular shape
Amount coding disk and the absolute coding being integrated in or beyond the ring-type of the incremental encoding disk and with the incremental encoding disk
Disk, the incremental encoding disk and the same pivot of absolute coding disk；The absolute encoder can be eccentric by two phase inscribes
Circle mask exposure obtains；Also include to produce and the pulse train corresponding to the anglec of rotation of the incremental encoding disk and counting
Grating reading head, and the anglec of rotation of the absolute coding disk to be converted to the photoelectric sensor of analog electrical signal；
Also include counting increment grid line and absolute coding angle electric signal corresponds and by caused by the photoelectric sensor
Electric signal obtains the display device of current absolute location.That is, simple absolute circle grating scale provided by the utility model, main bag
Include incremental encoding disk, absolute coding disk, grating reading head, photoelectric sensor and display device；Incremental encoding is in grating reading head
Counting under record angle or the displacement of motion, absolute coding is used to the absolute position of grating scale be marked, namely photoelectricity
Sensor is used to the absolute position where absolute coding disk being converted into corresponding electric signal, is exported according to grating reading head is corresponding
Counting, correction subdivision after voltage deviation, be stored in tables of data in, obtain each absolute position voltage deviation change, paint
Table is made or fits function；In measurement process, the voltage output value according to caused by photoelectric sensor, look-up table or root
According to the functional relation of fitting, absolute position is directly obtained, so as to avoid the back to zero of increment type grating scale from operating；Also overcome definitely
Formula Circular gratings chi the drawbacks of cost is high in high-acruracy survey.Circular gratings chi provided by the utility model, make simply, cost is low
Honest and clean, measurement process is quick, accurate, easy, strong antijamming capability.
Preferably, the grating reading head is set close to the incremental encoding disk.
Preferably, the photoelectric sensor is set close to the absolute coding disk.
Preferably, the display device includes counting institute between electric signal correspondingly to store grating reading head
The storage part of curve after form and/or fitting, and be connected with the storage part to by produced by the photoelectric sensor
Electric signal and the form and/or fitting after the curve be compared to obtain the acquisition unit of current absolute location, also
Including being connected with the acquisition unit to by current absolute location is exported and is shown output section.
Preferably, the photoelectric sensor is specially the anglec of rotation of the absolute coding disk is converted into voltage letter
Number photoelectric sensor.
Preferably, the output section is specially LED display.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, because absolute coding disk is located at the incremental encoding disk
Ring-type in (outer) two appearance design schemes principle function it is consistent, the present embodiment is located at the increment with absolute coding disk
Design in the ring-type of coding disk is described.It should be evident that drawings in the following description are only the utility model
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to offer
Accompanying drawing obtain other accompanying drawings.
The structural representation for the Circular gratings chi that Fig. 1 is provided by the utility model embodiment；
Fig. 2 is the schematic diagram of incremental encoding disk and absolute coding disk in Fig. 1；
Fig. 3 is the first position that absolute coding disk is residing in rotary course in Fig. 2；
Fig. 4 is the second place that absolute coding disk is residing in rotary course in Fig. 2；
Fig. 5 is the 3rd position that absolute coding disk is residing in rotary course in Fig. 2；
Fig. 6 is the 4th position that absolute coding disk is residing in rotary course in Fig. 2；
Fig. 7 is shown by the absolute coding disk voltage signal that photoelectric sensor exports during rotating a circle in Fig. 2
It is intended to；
Fig. 8 is by the schematic diagram of diverse location corresponding after the voltage signal subdivision in Fig. 7.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
In order that those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and specifically
The utility model is described in further detail for embodiment.
It refer to Fig. 1 to Fig. 8, the structural representation for the Circular gratings chi that Fig. 1 is provided by the utility model embodiment；Fig. 2
For the schematic diagram of incremental encoding disk and absolute coding disk in Fig. 1；Fig. 3 is that absolute coding disk is residing in rotary course in Fig. 2
First position；Fig. 4 is the second place that absolute coding disk is residing in rotary course in Fig. 2；Fig. 5 is absolute coding disk in Fig. 2
The 3rd residing position in rotary course；Fig. 6 is the 4th position that absolute coding disk is residing in rotary course in Fig. 2；Fig. 7
By the schematic diagram of absolute coding disk voltage signal that photoelectric sensor exports during rotating a circle in Fig. 2；Fig. 8 is will
The schematic diagram of corresponding diverse location after voltage signal subdivision in Fig. 7.
A kind of simple absolute circle grating scale provided by the utility model, mainly includes incremental encoding disk 11, absolute coding disk
12nd, grating reading head 2, photoelectric sensor 3 and display device；Wherein, incremental encoding disk 11 and absolute coding disk 12 can be referred to as
For grating coding disk；Incremental encoding disk 11 can use photolithography method to make, and absolute coding disk 12 can use mask-exposure
Technique productions；Certainly, the set-up mode of incremental encoding disk 11 and absolute coding disk 12 can also refer to prior art.
Core of the present utility model is to be combined incremental encoding disk 11 with absolute coding disk 12, and incremental encoding disk 11 is set
In annular shape, absolute coding disk 12 is located in or beyond the annulus of incremental encoding disk 11, and the Integral design of code-disc inclined with the increment 11,
As shown in Figure of description 1 and accompanying drawing 3.The Circular gratings chi rotates around axle O, and the incremental encoding disk 11 of Circular gratings chi utilizes grating
Reading head 2 is counted, and the count value is corresponding with the anglec of rotation of incremental encoding disk 11；The absolute coding disk 12 of Circular gratings chi
The anglec of rotation of absolute coding disk 12 is converted into electric signal using photoelectric sensor 3；In order to realize grating reading head 2 and photoelectricity
The normal work of sensor 3, grating reading head 2 can be set close to incremental encoding disk 11, and photoelectric sensor 3 is close to absolute coding
Disk 12 is set；Certainly, the set-up mode and operation principle of grating reading head 2 and photoelectric sensor 3 may be referred to prior art,
Repeat no more herein.
Circular gratings chi of the present utility model also includes display device, display device and grating reading head 2 and photoelectric sensor 3
It is connected, and can be by a pair of electric signal 1 caused by the counting of pulse train caused by grating reading head 2 and photoelectric sensor 3
Should, and current absolute location is obtained by electric signal caused by photoelectric sensor 3.
Specifically, the utility model by taking Figure of description 3 to accompanying drawing 6 as an example, using O as the center of circle press by absolute coding disk 12
According to turning clockwise, first position to the 4th position is undergone successively；Wherein, the P0-0 in accompanying drawing 3 is the first of absolute coding disk 12
Beginning position, namely first position；When absolute coding disk 12 is rotated to the second place, namely the position of the P0-N/2 in accompanying drawing 4；
When absolute coding disk 12 is rotated to three positions, namely the position of the P0-N in accompanying drawing 5；When absolute coding disk 12 is rotated to
During four positions, namely the position of the P0-i in accompanying drawing 6.That is, grating encoding coiling axle O is rotated, grating reading head 2 is used to count
Angle in rotation process corresponding to incremental encoding；Absolute coding in rotation process is converted into accordingly by photoelectric sensor 3
Voltage signal simultaneously exports；Grating coding disk rotates a circle during (2 π), obtains voltage letter caused by photoelectric sensor 3
Number, voltage is undergone from 0 to maximum VmaxAgain to 0 mechanical periodicity, in a cycle shown in voltage change table 1 below；
Table 1：Voltage signal and the corresponding relation of position
| Voltage/V | 0 | V1 | V2 | ...... | Vmax |
| Position | P0_0 | P0_1 | P0_2 | ...... | P0_N |
Figure of description 7 shows that grating coding disk (including incremental encoding disk 11 and absolute coding disk 12) is rotating a circle
During (2 π), voltage V with the change of position；Electric signal herein can be electricity caused by photoelectric sensor 3
Press signal；Certainly, according to being actually needed, electric signal can also be other kinds of signal, repeat no more herein.
According to the counting of the pulse train of the corresponding output in incremental encoding part, the voltage deviation after correction subdivision, number is stored in
Change according to the voltage deviation in table, obtaining each absolute position, be depicted as table or fit function；In measurement process,
According to voltage output value caused by photoelectric sensor 3, look-up table or the functional relation according to fitting, absolute position is directly obtained
Put, different magnitudes of voltage corresponds to corresponding position as shown in table 1.At the same time, the utility model will be current using display device
Position display, to know current location in time.
Wherein, the operation principle of photoelectric sensor 3 is：Under the irradiation of light source, the absolute coding disk of the Circular gratings chi of rotation
12 block light source, change photoelectric sensor photosensitive area generating period, produce the electric signal for corresponding to mechanical periodicity therewith.
For above-mentioned display device, it can include storage part, acquisition unit and output section；Storage part can be by pulse train
Between electric signal curve after one-to-one form and/or fitting stored, also i.e. by table 1 and/or accompanying drawing 8
Appearance is stored；Acquisition unit is connected with storage part, during actually detected, actual electric signal hair caused by photoelectric sensor 3
Acquisition unit is delivered to, acquisition unit is compared the electric signal of the actual electric signal and curve in the electric signal in table 1 and/or accompanying drawing 8
It is right, and then obtain current absolute location；And current absolute location is exported and shown using output section；Wherein, it is electric in table 1
Pressure should be consistent with the corresponding relation of the curve in accompanying drawing 8 with the corresponding relation of position, namely no matter by actual electric signal and table 1
In electric signal of the electric signal still with curve in accompanying drawing 8 be compared, obtained current absolute location should be consistent.Certainly, originally
The output section of utility model can be LED display, namely show current absolute location using LED display.
Simple absolute circle grating scale provided by the utility model, from the excellent of increment type Circular gratings chi and absolute type Circular gratings chi
Point sets out, and the incremental encoding part of common Circular gratings chi and absolute coding is partially bonded together, and increase photoelectric sensor
(or photosensor arrays)；It can not be restarted after easily losing pulse and power down when not only solving increment type Circular gratings chi high speed
The shortcomings that, and the drawbacks of also overcome absolute type Circular gratings chi cost is high in high-acruracy survey.
Simple absolute circle grating scale provided by the utility model is described in detail above.Tool used herein
Body example is set forth to principle of the present utility model and embodiment, and the explanation of above example is only intended to help and understood
Method and its core concept of the present utility model.It should be pointed out that for those skilled in the art, do not taking off
On the premise of from the utility model principle, some improvement and modification can also be carried out to the utility model, these are improved and modification
Also fall into the protection domain of the utility model claims.
Claims (6)
- A kind of 1. simple absolute circle grating scale, it is characterised in thatIncluding the incremental encoding disk (11) in annular shape and ring-type positioned at the incremental encoding disk (11) and with the increment The absolute coding disk (12) that coding disk (11) is integrated, the incremental encoding disk (11) have same with the absolute coding disk (12) One pivot；Also include to produce the grating with the pulse train corresponding to the anglec of rotation of the incremental encoding disk (11) and counting Reading head (2), and the anglec of rotation of the absolute coding disk (12) to be converted to the photoelectric sensor (3) of electric signal；Also include to obtain currently by electric signal caused by the grating reading head (2) and the photoelectric sensor (3) The display device of absolute position.
- 2. simple absolute circle grating scale according to claim 1, it is characterised in that the grating reading head (2) is close to institute State incremental encoding disk (11) setting.
- 3. simple absolute circle grating scale according to claim 1, it is characterised in that the photoelectric sensor (3) is close to institute State absolute coding disk (12) setting.
- 4. the simple absolute circle grating scale according to claims 1 to 3 any one, it is characterised in that the display device Including storing the storage of the curve after grating reading head counts the one-to-one form of institute between electric signal and/or is fitted Portion, and be connected with the storage part to by electric signal caused by the photoelectric sensor (3) and the form and/or plan The curve after conjunction is compared to obtain the acquisition unit of current absolute location, in addition to is connected with the acquisition unit to incite somebody to action The output section that current absolute location is exported and shown.
- 5. simple absolute circle grating scale according to claim 4, it is characterised in that the photoelectric sensor (3) is specially The anglec of rotation of the absolute coding disk (12) to be converted to the photoelectric sensor of voltage signal.
- 6. simple absolute circle grating scale according to claim 5, it is characterised in that the output section is specially that LED is shown Screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720770619.XU CN206974374U (en) | 2017-06-28 | 2017-06-28 | A kind of simple absolute circle grating scale |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720770619.XU CN206974374U (en) | 2017-06-28 | 2017-06-28 | A kind of simple absolute circle grating scale |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144225A (en) * | 2017-06-28 | 2017-09-08 | 广东工业大学 | A kind of simple absolute circle grating scale |
| CN108613689A (en) * | 2018-05-04 | 2018-10-02 | 广东工业大学 | A kind of rotating grating encoder measuring device and swing offset measurement method |
-
2017
- 2017-06-28 CN CN201720770619.XU patent/CN206974374U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144225A (en) * | 2017-06-28 | 2017-09-08 | 广东工业大学 | A kind of simple absolute circle grating scale |
| CN108613689A (en) * | 2018-05-04 | 2018-10-02 | 广东工业大学 | A kind of rotating grating encoder measuring device and swing offset measurement method |
| CN108613689B (en) * | 2018-05-04 | 2020-12-11 | 广东工业大学 | Rotary grating encoder measuring device and rotary displacement measuring method |
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