CN107764296A - Absolute position code and its reading device - Google Patents
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- CN107764296A CN107764296A CN201710880481.3A CN201710880481A CN107764296A CN 107764296 A CN107764296 A CN 107764296A CN 201710880481 A CN201710880481 A CN 201710880481A CN 107764296 A CN107764296 A CN 107764296A
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- 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
- G01D5/347—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 using displacement encoding scales
- G01D5/3473—Circular or rotary encoders
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Abstract
The invention provides a kind of absolute position code, the absolute position code is rectangle, including the position line, datum line and position code carrier；The absolute position code both sides edge line is s and r, and both sides the edge line s and r of the datum line and the absolute position code are vertically intersected on O points and P points, and the datum line OP line lengths are exactly the absolute position code element length；Described position line one end and the datum line intersect at that O points are into θ angle, and the other end intersects at Q points with the absolute position code opposite side edge line r, form right angled triangle OPQ.Biserial image sensor, it is the reading device of absolute position code.The present invention is with the high cost photo encoder of the alternative traditional high-resolution of high-resolution low cost, grating scale, tenthousandth micrometer etc..The present invention makes full use of image sensor high-resolution and high light sensitive characteristic to improve precision and reduce cost.
Description
Technical field
The present invention relates to Absolute position measurement technology and linear array image sensor technical field, particularly absolute position code
The field that composition and concatenate rule and its reading method are combined with linear array image sensor scan technology.
Background technology
Current position measurement apparatus mainly has photoelectric encoder, magnetic encoder, synchronous induction encoder, grating scale and gradually
Become gray encoder etc..The code-disc or yardstick of traditional location measurement apparatus ensure mainly by Physical Processing precision, with essence
The raising of degree, cost steeply rise.
The content of the invention
In order to solve problem in the prior art, the invention provides a kind of absolute position code, the absolute position code is square
Shape, including the position line, datum line and position code carrier；The absolute position code both sides edge line is s and r, the datum line with
Both sides the edge line s and r of the absolute position code are vertically intersected on O points and P points, and the datum line OP line lengths are exactly described absolute
Position code element length；It is into θ angle that described position line one end and the datum line intersect at O points, the other end and the absolute position
Code opposite side edge line r intersects at Q points, forms right angled triangle OPQ.
As a further improvement on the present invention, the absolute position code can continuous seamless connection, serial number n's and n+1
Two absolute position code concatenate rules：Serial number n absolute position code side edge line r and serial number n+1 absolute position code
Side edge line s is overlapped, and their datum line, with point-blank, dotted line x is two adjacent absolute position code sides
Coincidence line along the line.
As a further improvement on the present invention, in addition to bar code, the code value of the bar code is the absolute position code
Sequence number, it is parallel with the datum line to form the lines of the bar code, is hung down with absolute position code both sides the edge line s and r
It is straight intersecting.
As a further improvement on the present invention, the code value of the bar code is continuously incremented by or continuously successively decreased.
As a further improvement on the present invention, all lines in the position code carrier and the absolute position code are into most
Big gray scale difference, for the position code carrier to be white, all lines in the absolute position code are black.
A kind of biserial image sensor, the biserial image sensor are the recognition dresses of above-mentioned any one absolute position code
Put, the biserial image sensor includes driving recognition circuit, sensor circuit, lens A, lens B, light source, glass and structure
Body；The driving recognition circuit contains ADC analog to digital conversion circuits and connector, and the connector connects with the sensor circuit
Connect；The sensor circuit is inboard to be pasted with image sensing chip A and image sensing chip B side by side, and image sensing chip is by line
Battle array CCD or CMOS chip are spliced；The lens A and lens B is arranged on the image sensing chip A and the image
Sensing chip B smooth surfaces side, and the lens A and the lens B focus point just fall in the corresponding image biography
On sense chip A and the image sensing chip B pixel light median plane；The lens A and the lens B other ends side
Equipped with the light source, the light source is irradiated on the absolute position code through the glass, and the lens A and described
Mirror B just falls on the code of absolute position close to glass side focus point.
As a further improvement on the present invention, the lens A and lens B be by multiple lens pillar close-packed arrays and
Into strip lens.
As a further improvement on the present invention, a and b is the image sensing chip A and the image sensing chip B respectively
Corresponding scan line, scan line a and b is vertical with the datum line, with the position line into the small 90 ° of-θ in angle；The absolute position
The width for putting all lines in code is greater than the image sensing chip A and the image sensing chip B pixel elements spacing；Institute
The length for stating the i.e. described datum line of length of absolute position code is OP, the image sensing chip A and image sensing chip B pixels
First center spacing is d, and to avoid scan line a and scan line b while scanning at connecting line x, d can not be OP integral multiple.
As a further improvement on the present invention, scan line a intersects at M, N respectively with the position line, the datum line, institute
The sensitive volume of each pixel elements is changed into level signal when stating image sensing chip A work, through the ADC analog to digital conversion circuits
Be converted into numeral, these data pass through non-liner revision, turn into pixel elements quantized value m1 ... m16...n1, n2；The image
The area medium line G projected on sensing chip A is exactly measurement position, the complement β of the projected area quantized value of each pixel elements
(f-m) represent, f is ADC full scales, and m is the quantized value of the pixel elements, and β is constant, then is projected in pixel elements and often moves one
Pixel elements spacing i, it is all a pixel elemental area that projected area change is caused in G lines both sides, then the complement relation of i and quantized value
For i=β (f-0)=β f, if N points position is x, M points position is y, absolute position z, and QP line lengths are q, the position code sequence number
For n, length OP=u, if the image sensing chip A and the image sensing chip B resolution ratio are g, the ADC moduluses turn
It is f to change the full journey quantized value of circuit, if datum line is projected in first non-f quantized values pixel elements serial number N1 on sensing chip, most
Non- f quantized values pixel elements serial number Nj afterwards, intermediary image primitive element serial number Nc, n1...nj are respective pixel member quantized value；If position
Line projection first non-f quantized values pixel elements serial number M1 on sensing chip, last non-f quantized values pixel elements serial number Mk,
Intermediary image primitive element serial number Mc, m1...mk are respective pixel member quantized value, then calculation formula is as follows：
Nc=[(N1+ β (f-n1)/β f+N2+ β (f-n2)/β f+...+Nj+ β (f-nj)/β f)/j]
=[(N1+N2+...+Nj+ (f*j-n1-n2-...-nj)/f)/j]
Mc=[(M1+ β (f-m1)/β f+M2+ β (f-m2)/β f+...+Mk+ β (f-mk)/β f)/k]
=[(M1+M2+...+Mk+ (f*k-m1-m2-...-mk)/f)/k]
X=[Nc* β f+ β (f-n1+f-n2+...+f-nj)/2- β (f-n1+f-n2+...+f-n (Nc-N1))]
=[Nc* β f+ β (f*j-n1-n2-...-nj)/2- β (f* (Nc-N1)-n1-n2-...-n (Nc-N1))]
Y=[Mc* β f+ β (f-m1+f-m2+...+f-mk)/2- β (f-m1+f-m2+...+f-m (Mc-M1))]
=[Mc* β f+ β (f*k-m1-m2-...-mk)/2- β (f* (Mc-M1)-m1-m2-...-m (Mc-M1))]
Z=(n-1) * u+u*MN/QP
=(n-1) * u+u* (y-x)/(q*g/25.4* β f).
The beneficial effects of the invention are as follows：
The present invention is with the high cost photo encoder of the alternative traditional high-resolution of high-resolution low cost, grating scale, ten thousand
Divide chi etc..The present invention makes full use of image sensor high-resolution and high light sensitive characteristic to improve precision and reduce cost.Following table
Be the present invention with current main-stream product odds compared with.
| Device species | Diamagnetic interference | Resistance to mechanical is impacted | Reliability | It is non-contact | Coding rate | Resolution ratio | Antipollution | Cost |
| Photoelectricity | It is good | Difference | It is good | It is | It is high | Typically | Difference | It is high |
| Grating | It is good | Difference | It is good | It is | It is low | It is high | Difference | It is high |
| Magnetic-type | Difference | It is good | It is good | It is | It is high | It is low | It is good | Typically |
| Synchronous sensing | Typically | Typically | It is good | It is | It is high | It is low | Typically | Typically |
| Gradual change gray scale | It is good | Typically | It is good | It is | It is high | Typically | Difference | It is high |
| The present invention | It is good | Typically | It is good | It is | It is high | It is very high | Difference | It is low |
Brief description of the drawings
Fig. 1 is code structural representation in absolute position of the present invention；
Fig. 2 is code continuous seamless attachment structure schematic diagram in absolute position of the present invention；
Fig. 3 is biserial image sensor structure schematic diagram of the present invention；
Fig. 4 is absolute position code of the present invention and biserial image sensor structure schematic diagram；
Fig. 5 is that structural representation is distinguished in the measurement of bar code, the position line, datum line of the present invention.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
The present invention is mainly made up of two parts：Absolute position code 1 and biserial image sensor 2.Biserial image sensor is
The reading device of absolute position code.
As shown in figure 1, the existing rectangle of the absolute position code 1, including bar code 10, the position line 11, datum line 12 and position
Code carrier 13, the absolute position code 1 can also be free of the bar code 10.
The code value of the bar code 10 is exactly the sequence number of the absolute position code 1, form the lines of the bar code 10 with
The datum line 12 is parallel, is intersected vertically with absolute position code 1 both sides the edge line s and r.
Both sides the edge line s and r of the datum line 12 and the absolute position code 1 are vertically intersected on O points and P points, described
Datum line 12OP line lengths are exactly the element length of absolute position code 1.
It is into θ angle that described one end of the position line 11 and the datum line 12 intersect at O points, the other end and the absolute position code 1
Opposite side edge line r intersects at Q points, forms right angled triangle OPQ, and the position line 11 is used for position measurement.
Gray scale difference of the position code carrier 13 with all lines in the absolute position code 1 into maximum, it is generally described
For position code carrier 13 to be white, all lines in the absolute position code 1 are black, beneficial to measurement and recognition.
As shown in Fig. 2 the absolute position code 1 can continuous seamless connection.Serial number n and n+1 two absolute position codes 1
Concatenate rule：Serial number n absolute position code side edge line r and serial number n+1 absolute position code side edge line s weights
Close, and their datum line 12 is the same as point-blank；The code value of the bar code 10 is continuously incremented by or continuously successively decreased；Dotted line
X is two adjacent absolute position code edge line coincidence lines.
As shown in figure 3, biserial image sensor 2 includes driving recognition circuit 20, sensor circuit 23, lens A26, lens
B27, light source 29, glass 2a and structure 28.
The driving recognition circuit 20 contains ADC analog to digital conversion circuits 21 and connector 22, the connector 22 with it is described
Sensor circuit 23 connects.The sensor circuit 23 is inboard to be pasted with image sensing chip A24 and image sensing chip side by side
B25, image sensing chip are spliced by line array CCD or CMOS chip；The lens A26 and lens B27 is by multiple
The strip lens that lens pillar close-packed arrays form, the lens A26 and the lens B27 are arranged on the image sensing chip
A24 and the image sensing chip B25 smooth surfaces side, and the lens A26 and the lens B27 focus point just fall
On the corresponding image sensing chip A24 and the image sensing chip B25 pixel light median plane, i.e. biserial lens
Focus on biserial sensing chip, here it is the origin of biserial image sensor title.
The side of the lens A26 and the lens B27 other ends is equipped with the light source 29, described in the light source 29 passes through
Glass 2a is irradiated on the absolute position code 1, and the lens A26 and the lens B27 are close to the glass 2a sides
Focus point just falls on absolute position code 1, to obtain clearly scan-image.
As shown in Fig. 2 the biserial image sensor 2 performs relative motion when scanning the absolute position code 1, the direction of motion
It is parallel with the datum line 12；A and b is swept corresponding to the image sensing chip A24 and image sensing chip B25 respectively
Retouch line, it is understood that for the absolute position code 1 on the image sensing chip A24 and the image sensing chip B25
Projection；Scan line a and b is vertical with the datum line 12, with the position line 11 into the small 90 ° of-θ in angle；The absolute position
The width of all lines is greater than between the image sensing chip A24 and the image sensing chip B25 pixel elements in code 1
Away from；The length of the absolute position code 1 is that the length of the datum line 12 is OP, and the image sensing chip A24 and image are passed
Sense chip B25 pixel elements center spacing is d, and to avoid scan line a and scan line b while scanning at connecting line x, d can not be
OP integral multiple.
Operation principle：
When the biserial image sensor 2 is scanned to the position code 1, scan line a and b hangs down with the datum line 12
Directly, with the position line 11-θ angles in 90 °, as shown in Figure 2.By taking scan line a and the image sensing chip A24 as an example, sweep
Retouch line a and intersect at M, N respectively with the position line 11, the datum line 12, by measuring MN distances with regard to ON positions can be obtained.
The measurement recognition of the bar code 10, the position line 11, the datum line 12, as shown in Figure 5.Scan line a exists
Projection on the image sensing chip A24, including the bar code 10 projects, the position line 11 projects and the datum line
12 projections；The sensitive volume of each pixel elements can be changed into level signal during the image sensing chip A24 work, through described
ADC analog to digital conversion circuits 21 are converted into numeral, and these data pass through non-liner revision, turn into the pixel elements quantized value in Fig. 5
m1、...m16...n1、n2；The area medium line G projected on the image sensing chip A24 is exactly measurement position, and each picture
The projected area of primitive element can use the complement β (f-m) of quantized value to represent that f is ADC full scales, and m is the quantized value of the pixel elements, and β is
Constant, then it is projected in pixel elements and often moves a pixel elements spacing i, it is all one that projected area change is caused in G lines both sides
Pixel elemental area, then the complement relation of i and quantized value is i=β (f-0)=β f.
Similarly scan line a is measured scan line b.Because scan line a and scan line b spacing are d, therefore fixed corresponding pass be present
It is a=b-d.,, should be with scan line b readings to avoid malfunctioning when scan line a is close to connecting line x generally based on scan line a
Subtract d to be defined, i.e. a=b-d.
If N points position is x, M points position is y, and absolute position z, QP line lengths are q, the serial number n of absolute position code 1,
Length is OP=u, if the image sensing chip A24 and the image sensing chip B25 resolution ratio are g.The ADC moduluses turn
It is f to change the full journey quantized value of circuit 21.If datum line is projected in first non-f quantized values pixel elements serial number N1 on sensing chip,
Last non-f quantized values pixel elements serial number Nj, intermediary image primitive element serial number Nc, n1...nj are respective pixel member quantized value；If position
Line projection first non-f quantized values pixel elements serial number M1 on sensing chip is put, last non-f quantized values pixel elements serial number
Mk, intermediary image primitive element serial number Mc, m1...mk are respective pixel member quantized value.
Calculation formula：
Nc=[(N1+ β (f-n1)/β f+N2+ β (f-n2)/β f+...+Nj+ β (f-nj)/β f)/j]
=[(N1+N2+...+Nj+ (f*j-n1-n2-...-nj)/f)/j]
Mc=[(M1+ β (f-m1)/β f+M2+ β (f-m2)/β f+...+Mk+ β (f-mk)/β f)/k]
=[(M1+M2+...+Mk+ (f*k-m1-m2-...-mk)/f)/k]
X=[Nc* β f+ β (f-n1+f-n2+...+f-nj)/2- β (f-n1+f-n2+...+f-n (Nc-N1))]
=[Nc* β f+ β (f*j-n1-n2-...-nj)/2- β (f* (Nc-N1)-n1-n2-...-n (Nc-N1))]
Y=[Mc* β f+ β (f-m1+f-m2+...+f-mk)/2- β (f-m1+f-m2+...+f-m (Mc-M1))]
=[Mc* β f+ β (f*k-m1-m2-...-mk)/2- β (f* (Mc-M1)-m1-m2-...-m (Mc-M1))]
Z=(n-1) * u+u*MN/QP
=(n-1) * u+u* (y-x)/(q*g/25.4* β f)
Example：ADC is 16bit analog-digital converters, and its full journey is f=65535, position code length OP=2mm, Q to datum line
Distance QP=15mm, position code sequence number n=21, sensing chip resolution ratio g=1200dpi.As shown in figure 5, datum line pixel elements
Sequence number N1=11, N2=12, quantized value n1=3120, n2=0；The position line pixel elements sequence number M1=186, M16=201, quantify
Value m1=64978, m2=51234, m3=41786, m4=32675, m5=24367, m6=13211, m7=3680, m8=0,
M9=0, m10=6657, m11=13256, m12=24316, m13=34267, m14=42789, m15=50897, m16=
65268。
It is calculated as follows：
Nc=[(11+12+ (65535*2-3120-0)/65535)/2]
=[12.476]
=12
Mc=[(186+187+..+201+ (6535*16-64978-51234-41786-32675-24367-13211-
3680-0-0-6657-13256-24316-34267-427859-50897-65268)/65535)/16]
=[(3096+579179/65535)/16]
=[194.05]
=194
X=[12*65535 β+β ((65535*2-3120-0)/2-3120)]=β of [847275 β]=847275
Y=[194*65535 β+β (6535*16-64978-51234-41786-32675-24367-13211-3680-0-
0-6657-13256-24316-34267-427859-50897-65268)/2-(65535*(194-186)-64978-51234-
41786-32675-24367-13211-3680-0)]
=[12713790 β+β (579179/2-231931)]
=[12713790 β+β 57658]
=12771448 β
Z=(21-1) * 2mm+2mm* (12771448 β -847275 β)/(15*1200/25.4*65535 β)
=40mm+23848346 β mm/46442125.98 β
=40.5135mm
Theoretical resolution e=25.4mm/g/f/ (q/u)
=25.4mm/1200/65535/ (15/2)
=0.000000043mm
=0.00043um
=0.043nm
Application characteristic
Rotary encoder：Cylinder is made with absolute position code and substitutes code-disc, and biserial image sensor can scan inwall or outer
Absolute position code on wall.
Grating scale：Ruler is connected into absolute position code and substitutes grating scale, and grating reading head is substituted with biserial image sensor.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (9)
- A kind of 1. absolute position code, it is characterised in that：The absolute position code (1) is rectangle, including the position line (11), datum line And position code carrier (13) (12)；Absolute position code (1) both sides edge line is s and r, the datum line (12) with it is described absolutely O points and P points are vertically intersected on to both sides the edge line s and r of position code (1), datum line (12) the OP line lengths are exactly described exhausted To position code (1) element length；It is into θ angle that the described position line (11) one end and the datum line (12) intersect at O points, the other end with Absolute position code (1) the opposite side edge line r intersects at Q points, forms right angled triangle OPQ.
- 2. absolute position code according to claim 1, it is characterised in that：The absolute position code being capable of continuous seamless company Connect, serial number n and n+1 two absolute position code (1) concatenate rules：Serial number n absolute position code side edge line r and sequence Number overlapped for n+1 absolute position code side edge line s, and their datum line (12), with point-blank, dotted line x is Two adjacent absolute position code edge line coincidence lines.
- 3. absolute position code according to claim 2, it is characterised in that：Also include bar code (10), the bar code (10) code value is the sequence number of the absolute position code (1), forms the lines and the datum line (12) of the bar code (10) It is parallel, intersected vertically with absolute position code (1) both sides the edge line s and r.
- 4. absolute position code according to claim 3, it is characterised in that：The code value of the bar code (10) be continuously incremented by or Continuously successively decrease.
- 5. absolute position code according to claim 1, it is characterised in that：The position code carrier (13) and the absolute position All lines in code (1) are put into the gray scale difference of maximum, the position code carrier (13) is white, the absolute position code (1) In all lines be black.
- A kind of 6. biserial image sensor, it is characterised in that：The biserial image sensor is claim 1 to 5 any one The reading device of absolute position code, the biserial image sensor (2) include driving recognition circuit (20), sensor circuit (23), lens A (26), lens B (27), light source (29), glass (2a) and structure (28)；The driving recognition circuit (20) contains There are ADC analog to digital conversion circuits (21) and connector (22), the connector (22) is connected with the sensor circuit (23)；It is described Sensor circuit (23) inboard is pasted with image sensing chip A (24) and image sensing chip B (25), image sensing chip side by side It is spliced by line array CCD or CMOS chip；The lens A (26) and the lens B (27) are arranged on the image sensing core Piece A (24) and image sensing chip B (25) the smooth surface side, and the lens A's (26) and the lens B (27) is poly- Focus just falls in the pixel of the corresponding image sensing chip A (24) and the image sensing chip B (25) by light center On face；The side of the lens A (26) and the lens B (27) other end is equipped with the light source (29), and the light source (29) is saturating Cross the glass (2a) to be irradiated on the absolute position code (1), and the lens A (26) and the lens B (27) are close Glass (2a) side focus point just falls on absolute position code (1).
- 7. biserial image sensor according to claim 6, it is characterised in that：The lens A (26) and the lens B (27) it is the strip lens that are formed by multiple lens pillar close-packed arrays.
- 8. biserial image sensor according to claim 6, it is characterised in that：A and b is the image sensing chip respectively Scan line corresponding to A (24) and the image sensing chip B (25), scan line a and b is vertical with the datum line (12), with institute The position line (11) is stated into the small 90 ° of-θ in angle；The width of all lines is greater than the image sensing in the absolute position code (1) Chip A (24) and the pixel elements spacing of the image sensing chip B (25)；The length of the absolute position code (1) is the base The length of directrix (12) is OP, and the image sensing chip A (24) and image sensing chip B (25) pixel elements center spacing are d, To avoid scan line a and scan line b while scanning at connecting line x, d can not be OP integral multiple.
- 9. biserial image sensor according to claim 8, it is characterised in that：Scan line a and the position line (11), institute State datum line (12) and intersect at M, N respectively, convert the sensitive volume of each pixel elements when the image sensing chip A (24) works Into level signal, numeral is converted into through the ADC analog to digital conversion circuits (21), these data pass through non-liner revision, become as Primitive element quantized value m1 ... m16...n1, n2；The area medium line G projected on the image sensing chip A (24) is exactly to measure Position, the complement β (f-m) of the projected area quantized value of each pixel elements represent that f is ADC full scales, and m is the pixel elements Quantized value, β are constant, then are projected in pixel elements and often move a pixel elements spacing i, cause projected area to become in G lines both sides Change is all a pixel elemental area, then the complement relation of i and quantized value is i=β (f-0)=β f, if N points position is x, M points position Y, absolute position z are set to, QP line lengths are q, position code (1) serial number n, the length OP=u, if the image sensing core Piece A (24) and image sensing chip B (25) resolution ratio are g, and the full journey quantized value of the ADC analog to digital conversion circuits (21) is f, If datum line is projected in first non-f quantized values pixel elements serial number N1 on sensing chip, last non-f quantized values pixel elements sequence number For Nj, intermediary image primitive element serial number Nc, n1...nj are respective pixel member quantized value；If the position line is projected on sensing chip One non-f quantized values pixel elements serial number M1, last non-f quantized values pixel elements serial number Mk, intermediary image primitive element serial number Mc, M1...mk is respective pixel member quantized value, then calculation formula is as follows：Nc=[(N1+ β (f-n1)/β f+N2+ β (f-n2)/β f+...+Nj+ β (f-nj)/β f)/j]=[(N1+N2+...+Nj+ (f*j-n1-n2-...-nj)/f)/j]Mc=[(M1+ β (f-m1)/β f+M2+ β (f-m2)/β f+...+Mk+ β (f-mk)/β f)/k]=[(M1+M2+...+Mk+ (f*k-m1-m2-...-mk)/f)/k]X=[Nc* β f+ β (f-n1+f-n2+...+f-nj)/2- β (f-n1+f-n2+...+f-n (Nc-N1))]=[Nc* β f+ β (f*j-n1-n2-...-nj)/2- β (f* (Nc-N1)-n1-n2-...-n (Nc-N1))]Y=[Mc* β f+ β (f-m1+f-m2+...+f-mk)/2- β (f-m1+f-m2+...+f-m (Mc-M1))]=[Mc* β f+ β (f*k-m1-m2-...-mk)/2- β (f* (Mc-M1)-m1-m2-...-m (Mc-M1))]Z=(n-1) * u+u*MN/QP=(n-1) * u+u* (y-x)/(q*g/25.4* β f).
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| CN108716926A (en) * | 2017-09-26 | 2018-10-30 | 李里 | Absolute position code and its reading device |
| CN109631765A (en) * | 2018-12-07 | 2019-04-16 | 李里 | Blurring sensor and its measurement method |
| CN111023977A (en) * | 2019-09-06 | 2020-04-17 | 李里 | Displacement code, displacement code scale, detection method and device, and calibration method and system |
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| US7487916B2 (en) * | 2005-09-15 | 2009-02-10 | Symbol Technologies, Inc. | Imaging-based bar code reader with enhanced decoding capability |
| CN102706373B (en) * | 2012-05-24 | 2015-01-21 | 广东工业大学 | Single-track absolute grating scale and image coding method thereof |
| CN105627921B (en) * | 2015-12-18 | 2018-08-21 | 佛山轻子精密测控技术有限公司 | A kind of the subdivision acquisition system and its measurement method of absolute type encoder |
| CN205280099U (en) * | 2015-12-18 | 2016-06-01 | 佛山轻子精密测控技术有限公司 | Absolute position measuring device of absolute formula grating chi |
| CN107764296A (en) * | 2017-09-26 | 2018-03-06 | 李里 | Absolute position code and its reading device |
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| CN108716926A (en) * | 2017-09-26 | 2018-10-30 | 李里 | Absolute position code and its reading device |
| CN109631765A (en) * | 2018-12-07 | 2019-04-16 | 李里 | Blurring sensor and its measurement method |
| CN111023977A (en) * | 2019-09-06 | 2020-04-17 | 李里 | Displacement code, displacement code scale, detection method and device, and calibration method and system |
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