CN105973287B - A kind of more rail absolute grating ruler image encoding/decoding methods - Google Patents
A kind of more rail absolute grating ruler image encoding/decoding methods Download PDFInfo
- Publication number
- CN105973287B CN105973287B CN201610293695.6A CN201610293695A CN105973287B CN 105973287 B CN105973287 B CN 105973287B CN 201610293695 A CN201610293695 A CN 201610293695A CN 105973287 B CN105973287 B CN 105973287B
- Authority
- CN
- China
- Prior art keywords
- code
- label
- coding
- thick
- absolute grating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000003384 imaging method Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/36—Forming the light into pulses
- G01D5/38—Forming the light into pulses by diffraction gratings
Abstract
The invention discloses a kind of more rail absolute grating ruler image encoding/decoding methods, coding method includes：The multiple information of more rail absolute grating rulers is encoded using plain algorithm is searched, obtains the multiple information code of more rail absolute grating rulers, it is described to search plain algorithm and encoded characterized by maximum identical substring length, and flexible modulation group/cording quantity and coding range；The multiple information code of more rail absolute grating rulers is decomposed on a plurality of binary code channel, is then carried out on binary code channel position encoded, obtains corresponding binary code channel coding；Label is added between the code word of binary code channel coding, obtains final coding, and table is made and is stored according to coding codeword each in final coding and location information.The present invention has simple, efficient, and coding range is wide and can flexibly be adjusted, and decoding speed soon and advantage with high accuracy, can be widely applied to coding field.
Description
Technical field
The present invention relates to coding field, especially a kind of more rail absolute grating ruler image encoding/decoding methods.
Background technology
Grating scale is widely used precision measurement means on lathe, can be divided into base according to main measuring principle
(absolute code is also made to compile in the incremental code grating scale that Moire fringe blocks or interferes and the absolute code grating scale measured based on absolute code
Code device).Relative to incremental code grating scale, absolute code grating scale encodes each position, in actual use, absolute code light
Grid ruler remains to after restarting that reading position information is without back to zero under the fortuitous events such as power down, also not due to back to zero
Caused accumulated error.These advantages cause absolute code grating scale under the higher and higher trend of the degree of automation now, by
More and more extensive concern.
However, absolute code grating scale, especially more rail absolute grating rulers are decoded there is no unified international code and are marked at present
It is accurate so that grating scale it is complicated, coding range can not be adjusted not enough and flexibly, and decoding speed is slow and precision is low.
Invention content
In order to solve the above technical problems, it is an object of the invention to：There is provided it is a kind of simple, efficient, coding range it is wide and
It can flexibly be adjusted, more rail absolute grating ruler method for encoding images.
It is another object of the present invention to：It is an object of the invention to：It is simple to provide one kind, decoding speed is fast and precision is high
, more rail absolute grating ruler picture decoding methods.
The technical solution used in the present invention is：
A kind of more rail absolute grating ruler method for encoding images, include the following steps：
S1, the multiple information of more rail absolute grating rulers is encoded using searching plain algorithm, obtains more rail absolute grating rulers
Multiple information code, it is described to search plain algorithm and encoded characterized by maximum identical substring length, and flexible modulation coded number
Amount and coding range；
S2, the multiple information code of more rail absolute grating rulers is decomposed on a plurality of binary code channel, then on binary code channel
It carries out position encoded, obtains corresponding binary code channel coding；
S3, label is added between the code word of binary code channel coding, obtains final coding, and according in final coding
Each coding codeword and location information are made table and are stored.
Further, it is described to search plain algorithm satisfaction：There are one maximum identical substring length (b- between different codeword sequences
1), b is the code length of substring, and length can only at most occur once for the substring of (b-1) in code set；Arbitrary coding
Length is that the substring of b differs；Group/cording quantity and coding range are adjusted by information word number and code word size n.
Further, the information word number of more rail absolute grating ruler multiple informations is 2x, x is positive integer.
Further, the label is encoded for two code channel of a binary, and has been searched plain algorithm and excluded.
Another technical solution for being taken of the present invention is：
A kind of more rail absolute grating ruler picture decoding methods, include the following steps：
S1, the light transmission frame for obtaining more rail absolute grating rulers；
S2, binary symbol value is obtained according to light transmission frame, and polynary symbol value is synthesized according to binary symbol value；
S3, the label of code word each in polynary symbol value is identified, it is exhausted then to obtain more rails using matching method of tabling look-up
The accurate location of grating scale multiple information code is encoded.
Further, the step S2 includes：
S21, binary symbol value is obtained by imaging sensor according to light transmission frame；
S22, binary symbol value is synthesized by polynary symbol value according to the multiple information code decomposition rule of setting.
Further, the step S3 includes：
S31, the label of code word each in polynary symbol value is identified using matching method, identifies the position residing for outgoing label
It puts；
S32, it is decoded according to the location of label using matching method of tabling look-up, obtains the thick code of label position, the mark
It signs the thick code in position and includes the thick code of codeword position and the thick code of label codeword position before label；
S33, according to the label information of each code word, to label position, thick code is finely divided, and obtains decoded code value.
Further, the step S32 is specially：
If label is located at the front half section of decoding image, the rear b bit symbols of label are decoded using matching method of tabling look-up,
And the location information to obtain is as the thick code A of label codeword position, at this point, the thick code of codeword position is A- (l+n) * d before label；If
Label is located at the second half section of decoding image, then the preceding b bit symbols of label are decoded using matching method of tabling look-up, and to obtain
Location information is as the thick code A of codeword position before label, at this point, the thick code of label codeword position is A+ (l+n) * d, wherein, decoding figure
As being decoded by light transmission frame, b is the code length of substring, and l is the length of label, and n is the length of code word, and d is single
The width of root grating.
Further, the step S33 is specially：
Using the most central bar code symbol of label as position reference point, joined using the central point for decoding image as position is measured
Examination point, judges whether position reference point overlaps with measuring position reference point, if so, using the thick code of label position as decoded
Code value；Conversely, according to position reference point and distance and the location of label between position reference point then are measured into advancing one
Step subdivision, and the subdivision value to obtain is as decoded code value.
Further, it is described according to position reference point and measure distance between position reference point and the location of label into
It goes further the step for segmenting, is specially：
According to the location of the distance p*d between position reference point and measurement position reference point and label to label position
Thick code is further segmented, if label is located at the front half section of decoding image, the thick decoded code values of code A of label codeword position
For A+p*d, the decoded code value of the thick code of codeword position is A- (l+n-p) * d before label；If label is located at the later half of decoding image
Section, then the thick decoded code values of code A of codeword position are A-p*d before label, and the decoded code value of the thick code of label codeword position is A+
(l+n-p) * d, p are position reference point and measure the number between position reference point apart from symbol.
The advantageous effect of coding method of the present invention is：Plain algorithm is searched to more using what maximum identical substring length was characterized
The multiple information of rail absolute grating ruler is encoded, and energy flexible modulation group/cording quantity and coding range, coding range are wide；By more rails
The multiple information code of absolute grating ruler is decomposed on a plurality of binary code channel, and multiple information code is decomposed into existing grating scale manufactures skill
The binary information code position coding method that art generally uses, simple in structure, coding rate is fast, efficient；Coding code word it
Between add label, convenient for being decoded subsequently through the mode of tag location.
The advantageous effect of coding/decoding method of the present invention is：Binary symbol value is first obtained according to the light transmission frame of acquisition,
Polynary symbol value is synthesized further according to binary symbol value, then the label of code word each in polynary symbol value is identified, finally
The accurate location that more rail absolute grating ruler multiple information codes are obtained using matching method of tabling look-up is encoded, integrated use tag location
Mode and matching method of tabling look-up are decoded, and simple in structure, decoding speed is fast and precision is high.Further, the position according to residing for label
It puts and is decoded using matching method of tabling look-up, the thick code of label position is obtained, then according to the label information of each code word to label position
It puts thick code to be finely divided, obtains decoded code value, more accurately.Further, matching algorithm of tabling look-up only needs to carry out b bit symbols
Matching, without carry out all-key matching, further improve decoding speed.
Description of the drawings
Fig. 1 is a kind of step flow chart of more rail absolute grating ruler method for encoding images of the present invention；
Fig. 2 is a kind of step flow chart of more rail absolute grating ruler picture decoding methods of the present invention；
Fig. 3 is the process schematic that the thick code in a pair of of embodiment of the present invention position is finely divided.
Specific embodiment
With reference to Fig. 1, a kind of more rail absolute grating ruler method for encoding images include the following steps：
S1, the multiple information of more rail absolute grating rulers is encoded using searching plain algorithm, obtains more rail absolute grating rulers
Multiple information code, it is described to search plain algorithm and encoded characterized by maximum identical substring length, and flexible modulation coded number
Amount and coding range；
S2, the multiple information code of more rail absolute grating rulers is decomposed on a plurality of binary code channel, then on binary code channel
It carries out position encoded, obtains corresponding binary code channel coding；
S3, label is added between the code word of binary code channel coding, obtains final coding, and according in final coding
Each coding codeword and location information are made table and are stored.
Preferred embodiment is further used as, it is described to search plain algorithm satisfaction：There are one between different codeword sequences
Maximum identical substring length (b-1), b are the code length of substring, and the substring that length is (b-1) is most in code set
Can occur primary；The substring that arbitrary code length is b differs；Group/cording quantity is adjusted by information word number and code word size n
And coding range.
Preferred embodiment is further used as, the information word number of more rail absolute grating ruler multiple informations is 2x, x is
Positive integer.
Preferred embodiment is further used as, the label is encoded for two code channel of a binary, and has been searched plain algorithm institute
It excludes.
With reference to Fig. 2, a kind of more rail absolute grating ruler picture decoding methods include the following steps：
S1, the light transmission frame for obtaining more rail absolute grating rulers；
S2, binary symbol value is obtained according to light transmission frame, and polynary symbol value is synthesized according to binary symbol value；
S3, the label of code word each in polynary symbol value is identified, it is exhausted then to obtain more rails using matching method of tabling look-up
The accurate location of grating scale multiple information code is encoded.
Preferred embodiment is further used as, the step S2 includes：
S21, binary symbol value is obtained by imaging sensor according to light transmission frame；
S22, binary symbol value is synthesized by polynary symbol value according to the multiple information code decomposition rule of setting.
Preferred embodiment is further used as, the step S3 includes：
S31, the label of code word each in polynary symbol value is identified using matching method, identifies the position residing for outgoing label
It puts；
S32, it is decoded according to the location of label using matching method of tabling look-up, obtains the thick code of label position, the mark
It signs the thick code in position and includes the thick code of codeword position and the thick code of label codeword position before label；
S33, according to the label information of each code word, to label position, thick code is finely divided, and obtains decoded code value.
Preferred embodiment is further used as, the step S32 is specially：
If label is located at the front half section of decoding image, the rear b bit symbols of label are decoded using matching method of tabling look-up,
And the location information to obtain is as the thick code A of label codeword position, at this point, the thick code of codeword position is A- (l+n) * d before label；If
Label is located at the second half section of decoding image, then the preceding b bit symbols of label are decoded using matching method of tabling look-up, and to obtain
Location information is as the thick code A of codeword position before label, at this point, the thick code of label codeword position is A+ (l+n) * d, wherein, decoding figure
As being decoded by light transmission frame, b is the code length of substring, and l is the length of label, and n is the length of code word, and d is single
The width of root grating.
Preferred embodiment is further used as, the step S33 is specially：
Using the most central bar code symbol of label as position reference point, joined using the central point for decoding image as position is measured
Examination point, judges whether position reference point overlaps with measuring position reference point, if so, using the thick code of label position as decoded
Code value；Conversely, according to position reference point and distance and the location of label between position reference point then are measured into advancing one
Step subdivision, and the subdivision value to obtain is as decoded code value.
Be further used as preferred embodiment, it is described according to position reference point and measure the distance between position reference point with
And the location of label the step for further being segmented, it is specially：
According to the location of the distance p*d between position reference point and measurement position reference point and label to label position
Thick code is further segmented, if label is located at the front half section of decoding image, the thick decoded code values of code A of label codeword position
For A+p*d, the decoded code value of the thick code of codeword position is A- (l+n-p) * d before label；If label is located at the later half of decoding image
Section, then the thick decoded code values of code A of codeword position are A-p*d before label, and the decoded code value of the thick code of label codeword position is A+
(l+n-p) * d, p are position reference point and measure the number between position reference point apart from symbol.
The present invention is described in further detail with specific embodiment with reference to the accompanying drawings of the specification.
Embodiment one
The present invention proposes a kind of more rail absolute grating ruler image encoding/decoding methods, and multiple information is decomposed a plurality of two
First code channel, such as can by four metamessages (A, G, C, T) decomposable asymmetric choice net to two binary code channels, and eight metamessages then decomposable asymmetric choice net to three
Binary code channel is first-class；Then it is carried out position encoded, table of tabling look-up is made.During decoding, compared using table match method
Decode corresponding location information.The present embodiment mainly by taking four metamessages as an example, illustrates the realization process of coding and decoding.
More rail absolute grating ruler image encoding/decoding methods of the present embodiment mainly include：
(1) it encodes
(1) in order to ensure the uniqueness of different coding codewords and otherness and yardage, present invention employs searching algorithm,
Realize the coding to four metamessages (A, G, C, T).The searching algorithm of the present embodiment has the characteristics that：1) it ensure that coding is different
The otherness of code word, there are one maximum identical substring length (b-1) between different codeword sequences, and the substring that length is (b-1)
Can only at most occur in code set primary；2) substring that arbitrarily coding code length is b differs；3) pass through information word number
And code word size n adjusts group/cording quantity and coding range.The code word number of coding can be reasoned out according to the range of code length is required
Amount.For general multiple information coding, the information word number the big, and the code pond encoded is also bigger, available encoded number
It is more.The present invention realizes the adjusting of group/cording quantity by the adjusting of information word number and code word size n, so as to have adjusted coding site
Length range.
(2) in order to be positioned to each code word, the present embodiment adds label between code word.What the present embodiment added in
The label binary two code channel coding special for one, is excluded by searching algorithm before.For example, during b=7, the label
Two rows same 1110111 are can be taken as, i.e. the label of quaternary symbol is TTTCTTT.Wherein, the position of C will corresponding coding site
Reference point.Tag length l, then complete code length is l+n, code word form can for (lllllnnnn) form or
(nnnnllll) head or tail of form, i.e. label as code word, the present embodiment is using for as code word head；D is single
The width of grating, then code word spacing is (l+n) * d.
(2) it decodes
(1) used optical system is traditional optical sensor system during present invention decoding.It is passed through by the light that light source is sent out
It is impinged perpendicularly on grating scale after crossing collimating mirror, and grating scale light transmission information is read after being handled by imaging sensor below, most
It is decoded afterwards by subsequent embedded device.The reading code message length of the present embodiment imaging sensor is taken as l+2n, it is ensured that
At least one label is read in visual field.
(2) each coding codeword and location information are made table of tabling look-up by the present invention, after the image procossing of acquisition, are obtained
Its polynary symbol value, then passes through matching process of tabling look-up, you can finds the location information represented by it, concrete implementation process is such as
Under：
1) binary symbol value is obtained by imaging sensor first, and passes through (one) determining decomposition rule synthesis multi-element code
Code value；Then it identifies label, the position of label is obtained by matching method.Since label is the special code word elected, by
The position of label is easy to get with method.Followed by being decoded, marked using matching method of tabling look-up according to the location of label
Sign the thick code in position：If identifying, obtained label is located at the front half section of decoding image, and decoding of tabling look-up to b bit symbols after label obtains
To location information be the thick code of label codeword position, be set as A, the thick code of codeword position is A- (l+n) * d before label；If it identifies
The label arrived is located at the second half section of decoding image, then decoding of tabling look-up to b bit symbols before label, obtained location information is label
The thick code in position of previous code word, is set as A, then the thick code of label codeword position (i.e. the positional value of code word corresponding to label) is A+ (l
+n)*d.It is that can obtain the thick code C in position of label by the method.Due to the substring not phase that any two code length is b
Together, so the matching algorithm of the present invention only needs to carry out the matching of b bit symbols, without carrying out all-key matching, decoded speed
Degree is faster.
In addition, grating scale is in the operating condition, due to the variation of work condition environment, such as because adverse circumstances occur grid line pollution or
Imaging sensor reading head may lead to the identification difficulty of indivedual grid lines, can suitably carry at this time to the distance change of grating scale etc.
High decoded redundancy carries out the symbol more than b and matches, so as to ensure to remain to be correctly decoded in the presence of a harsh environment, improves solution
The reliability of code.
2) it is segmented using the label information of each code word：Using the most central bar code symbol C of label as position reference point, with
The central point of decoding image is the reference point for measuring position, judges whether the two overlaps, if so, the thick code of label position is accurate
It is worth (i.e. decoded code value)；Conversely, according to residing for the distance p*d and label between position reference point and measurement position reference point
Position be finely divided, subdivision value is obtained, and using subdivision value as decoded code value, as shown in Fig. 3 and the following table 1.
1 label position of table and decoding result mapping table
The present invention proposes a kind of more rail absolute grating ruler image encoding/decoding methods, including：Multiple information passes through maximum
The cataloged procedure that identical substring length is characterized, can flexible modulation coded number and coding range；Multiple information code is decomposed into existing
Have grating scale manufacturing technology can and binary information code process, it is simpler, it is more efficient；It is carried out by the positioning of label position
Decoding process, decoding speed is fast and precision is high.The present invention is a kind of simple, quick and feasible coding-decoding method, due to it
Grating scale after coding is a plurality of binary information, therefore can also segment technology using existing binary raster ruler to improve essence
Degree.
It is that the preferable of the present invention is implemented to be illustrated, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations under the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (10)
1. a kind of more rail absolute grating ruler method for encoding images, it is characterised in that：Include the following steps：
S1, the multiple information of more rail absolute grating rulers is encoded using searching plain algorithm, obtains the more of more rail absolute grating rulers
Metamessage code, it is described to search plain algorithm and encoded characterized by maximum identical substring length, and can flexible modulation group/cording quantity and
Coding range；
S2, the multiple information code of more rail absolute grating rulers is decomposed on a plurality of binary code channel, is then carried out on binary code channel
It is position encoded, obtain corresponding binary code channel coding；
S3, label is added between the code word of binary code channel coding, obtains final coding, and according to each in final coding
Coding codeword and location information are made table and are stored.
2. a kind of more rail absolute grating ruler method for encoding images according to claim 1, it is characterised in that：It is described to search plain calculation
Method meets：There are one maximum identical substring length (b-1) between different codeword sequences, b is the code length of substring, and long
Spending can only at most occur once for the substring of (b-1) in code set；The substring that arbitrary code length is b differs；It is logical
It crosses information word number and code word size n adjusts group/cording quantity and coding range.
3. a kind of more rail absolute grating ruler method for encoding images according to claim 2, it is characterised in that：More rails are exhausted
Information word number to grating scale multiple information is 2x, x is positive integer.
4. a kind of more rail absolute grating ruler method for encoding images according to claim 1,2 or 3, it is characterised in that：It is described
Label is encoded for two code channel of a binary, and has been searched plain algorithm and excluded.
5. a kind of more rail absolute grating ruler picture decoding methods, it is characterised in that：Include the following steps：
S1, the light transmission frame for obtaining more rail absolute grating rulers；
S2, binary symbol value is obtained according to light transmission frame, and polynary symbol value is synthesized according to binary symbol value；
S3, the label of code word each in polynary symbol value is identified, more rail absolute lights is then obtained using matching method of tabling look-up
The accurate location coding of grid ruler multiple information code.
6. a kind of more rail absolute grating ruler picture decoding methods according to claim 5, it is characterised in that：The step S2
Including：
S21, binary symbol value is obtained by imaging sensor according to light transmission frame；
S22, binary symbol value is synthesized by polynary symbol value according to the multiple information code decomposition rule of setting.
7. a kind of more rail absolute grating ruler picture decoding methods according to claim 5, it is characterised in that：The step S3
Including：
S31, the label of code word each in polynary symbol value is identified using matching method, the location of identification outgoing label；
S32, it is decoded according to the location of label using matching method of tabling look-up, obtains the thick code of label position, the label position
It puts thick code and includes the thick code of codeword position and the thick code of label codeword position before label；
S33, according to the label information of each code word, to label position, thick code is finely divided, and obtains decoded code value.
8. a kind of more rail absolute grating ruler picture decoding methods according to claim 7, it is characterised in that：The step
S32 is specially：
If label is located at the front half section of decoding image, the rear b bit symbols of label are decoded using matching method of tabling look-up, and with
Obtained location information is as the thick code A of label codeword position, at this point, the thick code of codeword position is A- (l+n) * d before label；If label
Positioned at the second half section of decoding image, then the preceding b bit symbols of label are decoded, and the position to obtain using matching method of tabling look-up
Information is as the thick code A of codeword position before label, at this point, the thick code of label codeword position is A+ (l+n) * d, wherein, decoding image by
Light transmission frame decodes, and b is the code length of substring, and l is the length of label, and n is the length of code word, and d is single light
The width of grid.
9. a kind of more rail absolute grating ruler picture decoding methods according to claim 8, it is characterised in that：The step
S33 is specially：
Using the most central bar code symbol of label as position reference point, to decode the central point of image as measuring reference by location
Point, judges whether position reference point overlaps with measuring position reference point, if so, using the thick code of label position as decoded code
Value；Conversely, it is then carried out according to the location of the distance between position reference point and measurement position reference point and label further
Subdivision, and the subdivision value to obtain is as decoded code value.
10. a kind of more rail absolute grating ruler picture decoding methods according to claim 9, it is characterised in that：The basis
The step for the location of distance and label between position reference point and measurement position reference point are further segmented,
Specially：
According to position reference point and measure distance p*d between position reference point and the location of label to label position thick code
It is further segmented, if label is located at the front half section of decoding image, the thick decoded code values of code A of label codeword position are A+
P*d, the decoded code value of the thick code of codeword position is A- (l+n-p) * d before label；If label is located at the second half section of decoding image,
The thick decoded code values of code A of codeword position are A-p*d before label, and the decoded code value of the thick code of label codeword position is A+ (l+n-
P) * d, p are position reference point and measure the number between position reference point apart from symbol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293695.6A CN105973287B (en) | 2016-05-04 | 2016-05-04 | A kind of more rail absolute grating ruler image encoding/decoding methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293695.6A CN105973287B (en) | 2016-05-04 | 2016-05-04 | A kind of more rail absolute grating ruler image encoding/decoding methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105973287A CN105973287A (en) | 2016-09-28 |
| CN105973287B true CN105973287B (en) | 2018-07-06 |
Family
ID=56991148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610293695.6A Expired - Fee Related CN105973287B (en) | 2016-05-04 | 2016-05-04 | A kind of more rail absolute grating ruler image encoding/decoding methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105973287B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362208B (en) * | 2018-04-02 | 2024-04-05 | 广州数控设备有限公司 | Pseudo-random code channel grating ruler and reading method thereof |
| CN114079780A (en) * | 2020-08-20 | 2022-02-22 | 腾讯科技（深圳）有限公司 | Video decoding method, video encoding method, video decoding apparatus, video encoding apparatus, and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562500U (en) * | 2012-05-24 | 2012-11-28 | 广东工业大学 | Single-track absolute grating ruler |
| CN103411635A (en) * | 2013-07-26 | 2013-11-27 | 广东工业大学 | Code micro-macro combined collection method of absolute grating ruler |
| CN103759749A (en) * | 2013-12-13 | 2014-04-30 | 合肥工业大学 | Single-code-channel absolute position encoder |
| CN103759660A (en) * | 2014-01-28 | 2014-04-30 | 广东工业大学 | Method for auxiliary installation and error compensation of absolute optical grating ruler |
| CN104019834A (en) * | 2014-05-22 | 2014-09-03 | 中国科学院上海光学精密机械研究所 | Single code channel absolute position coding method and reading measuring system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07888Y2 (en) * | 1988-02-22 | 1995-01-11 | 株式会社ミツトヨ | Optical displacement detector |
-
2016
- 2016-05-04 CN CN201610293695.6A patent/CN105973287B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562500U (en) * | 2012-05-24 | 2012-11-28 | 广东工业大学 | Single-track absolute grating ruler |
| CN103411635A (en) * | 2013-07-26 | 2013-11-27 | 广东工业大学 | Code micro-macro combined collection method of absolute grating ruler |
| CN103759749A (en) * | 2013-12-13 | 2014-04-30 | 合肥工业大学 | Single-code-channel absolute position encoder |
| CN103759660A (en) * | 2014-01-28 | 2014-04-30 | 广东工业大学 | Method for auxiliary installation and error compensation of absolute optical grating ruler |
| CN104019834A (en) * | 2014-05-22 | 2014-09-03 | 中国科学院上海光学精密机械研究所 | Single code channel absolute position coding method and reading measuring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105973287A (en) | 2016-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103411540B (en) | A kind of high-accuracy grating displacement measuring device | |
| EP2414782B1 (en) | A one-dimension position encoder | |
| KR840004965A (en) | Data transfer method | |
| CN105973287B (en) | A kind of more rail absolute grating ruler image encoding/decoding methods | |
| TWI519766B (en) | Method and apparatus for determining position | |
| JP2004529344A (en) | Absolute position measurement method | |
| KR910005590A (en) | Generalized Viterbi Decoding Method | |
| CN102095439B (en) | Single-code-channel absolute-position encoding method, decoding method and measuring device | |
| JP2013003143A (en) | Linear position measurement system | |
| CN104713479A (en) | Absolute type linear grating ruler and encoding method thereof | |
| CN106908091B (en) | A kind of grating and method for detecting position, system | |
| CN107966106A (en) | A kind of absolute grating scale and displacement measurement method | |
| JP2001074507A (en) | Device and method for determining positions of parts which move relatively with each other | |
| CN1379931A (en) | High-speed ACS unit for viterbi decoder | |
| IT1263630B (en) | PROCEDURE AND DEVICE FOR READING A BAR CODE | |
| CN104243095A (en) | Code word type blind identification method for convolutional code and linear block code | |
| CN113984094B (en) | Decoding method, device, medium and product of absolute value encoder | |
| CN107016318A (en) | A kind of bar code decoding method and device | |
| CN111289015A (en) | Multi-resolution absolute position measuring device | |
| CN105783715B (en) | A kind of absolute grating scale measuring device and its measurement method | |
| CN106991348A (en) | A kind of bar code decoding method and device | |
| CN102062615B (en) | Position coding method of single-code channel | |
| Denic et al. | Code reading synchronization method for pseudorandom position encoders | |
| CN202329553U (en) | Precise displacement measurement device with real scale | |
| CN102818511B (en) | Linear position is measured system and determines the compartment method along the absolute position of guide rail |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180706 Termination date: 20210504 |