CN106767538B - A kind of high-precision angle-measuring method - Google Patents
A kind of high-precision angle-measuring method Download PDFInfo
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- CN106767538B CN106767538B CN201611028388.1A CN201611028388A CN106767538B CN 106767538 B CN106767538 B CN 106767538B CN 201611028388 A CN201611028388 A CN 201611028388A CN 106767538 B CN106767538 B CN 106767538B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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Abstract
Invention describes a kind of high-precision angle-measuring methods, and using the DVD disc of the optical track containing two circular concentrics, the coding of angle measurement rail recycles a Zhou Zucheng by " 10 "；Walking direction rail successively increases one " 0 " between " 1 ", and such one week as direction code；Optical code disk is fixed on the mounting platform being arranged in the middle part of rotation axis；Rotation axis is connected with system under test (SUT)；The consistent laser head of spacing of two spacing and two optical tracks is set below optical code disk；Using the angle interval of each data bit as the foundation of angle measurement, and calculate the data bit adjustment factor of angle measurement rail and walking direction rail；The actual deviation angle of angle measurement rail measured is calculated according to the adjustment factor.The present invention is at low cost, and measurement accuracy is high, and use scope is extensive；Not only angle rotation and bias direction may determine that, but also simple method can be used to improve resolution ratio, high-acruracy survey angle is carried out with low cost.
Description
Technical field
The present invention relates to Technology of Precision Measurement field, especially a kind of high-precision angle-measuring method.
Background technique
Accurate measurement has an a large amount of application in Aeronautics and Astronautics, naval vessel, numerical control device, such as main shaft of numerical control machine tool
Angle value measurement is related to the precision of lathe.Present high precision angle measuring apparatus grating encoder be in one week groove of disc, and it is right
The sine wave that secondary grating and key light grid are formed during exercise carries out digital subdivision, to improve resolution ratio, needs high groove
Number, its structure is complicated, manufacture difficulty is big, expensive, or even needs to be given birth under the ultra-clean of hundred meters of underground, squelch
It produces.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of high-precision angle-measuring method, raw with low cost under simple environment
Produce the high-acruracy survey angle of the leading level in the world.
In order to realize the purpose for solving above-mentioned technical problem, present invention employs following technical solutions:
A kind of high-precision angle-measuring method, using the DVD disc of the optical track containing two circular concentrics, DVD disc, that is, optical code disk,
The optical track of two circular concentrics is the angle measurement rail of outer ring, inner ring walking direction rail respectively, and the coding of angle measurement rail is by " 10 " circulation one
Zhou Zucheng；The coding of walking direction rail successively increases one " 0 ", such as characterized by " 01001000100001 " between " 1 "
It is used as direction code within this week；Optical code disk is fixed on the mounting platform being arranged in the middle part of rotation axis；Rotation axis and system under test (SUT)
It is connected, when system under test (SUT) rotates, rotation axis can rotate with it and optical code disk is driven to rotate；
The consistent laser head of spacing of setting two spacing and two optical tracks below optical code disk, difference face angle measurement rail,
Walking direction rail, laser head are used to emit laser and receive the reflection laser of angle measurement rail and walking direction rail；
Control system is communicated to handle the data, data calculation and system under test (SUT) of laser head reading and transmission, and according to
The rotation of data control motor；
When system under test (SUT) moves in the environment of shaking generates radial deflection, control system controls motor rotation, fine tuning
The position of laser head makes laser head be respectively aligned to angle measurement rail, walking direction rail；When generating axial dipole field, laser head is according to partially
It moves size and adjusts focal length, laser head is enable accurately to read the data of quasi- angle measurement rail, walking direction rail；
According to the diameter difference of angle measurement rail and walking direction rail, calculate angle measurement rail and walking direction rail data bit difference and
The difference accounts for angle measurement rail total data position ratio, calculates the data bit adjustment factor of angle measurement rail and walking direction rail；According to the adjusting
The actual deviation angle of coefficient calculating angle measurement rail measured；Above-mentioned measurement and set-up procedure are repeated until system under test (SUT) stops work
Make.
It is more bigger than walking direction rail diameter such as since angle measurement rail is in outer ring, by taking 0.2 second precision as an example, angle measurement rail perimeter
About 25.92CM, data bit have 648000, walking direction rail Zhou Changyue 24.48CM, and data bit has 612000, difference 36000
It is a, the 1/18 of angle measurement rail is accounted for, then needing to provide data bits by the method for " the every mistake 18 of angle measurement rail subtracts 1 " for walking direction rail
Amount.
More specifically, a kind of high-precision angle-measuring method of this patent, specific steps are as follows:
1, optical code disk of the production comprising angle measurement rail, walking direction rail；
2, installation obtains angle-measuring equipment, so that:
Shell and upper cover form the space of a sealing；Internal power cord and data line draw from the outlet hole in shell outer rim
Out；Power supply line is set for system；Data line is connected into master control borad and system under test (SUT)；
Optical code disk is installed on the mounting platform in the middle part of rotation axis；
The outer ring of bearing is mounted in the hole one of housing bottom, rotation axis bottom end is mounted on the inner ring of bearing, master control borad
It is immobilized in the shell, rotation axis passes through the hole three at the hole two at master control borad center, optical code disk center, the mounting platform position in rotation axis
Above master control borad, optical code disk is fixedly mounted on mounting platform, and rotation axis top passes through the Kong Si at upper cover center, and rotation axis is stretched
The part of case top lid is connected with system under test (SUT) out, so that rotation axis can rotate with it and band when system under test (SUT) rotation
Dynamic optical code disk rotation；
Single-chip microcontroller, motor, power supply line, data line are arranged on master control borad, screw rod one end is connected to motor, pedestal and spiral shell
Bar is connected, and two laser heads are mounted on the base, for emitting laser and receiving the angle measurement rail and walking direction rail of optical code disk
Reflection laser；
3, it is powered on to measuring device, self-test enters working condition after passing through；
4, when system under test (SUT) generates rotation, rotation axis rotates with it and optical code disk is driven to rotate, and two laser heads are simultaneously
The data of corresponding optical track are read, this data is converted into angle value and rotation direction after being input to single-chip microcontroller, and passes through data line
It is output to system under test (SUT)；
When system under test (SUT) moves in the environment of shaking generates radial deflection, single-chip microcontroller controls motor rotation, and fine tuning swashs
The position of shaven head, makes laser head be respectively aligned to angle measurement rail, walking direction rail；When generating axial dipole field, laser head is according to offset
Size adjusts focal length, and laser head is enable accurately to read the data of quasi- angle measurement rail, walking direction rail；
According to the diameter difference of angle measurement rail and walking direction rail, calculate angle measurement rail and walking direction rail data bit difference and
The difference accounts for angle measurement rail total data position ratio, calculates the data bit adjustment factor of angle measurement rail and walking direction rail；According to the adjusting
The actual deviation angle of coefficient calculating angle measurement rail measured；
It is more bigger than walking direction rail diameter such as since angle measurement rail is in outer ring, by taking 0.2 second precision as an example, angle measurement rail perimeter
About 25.92CM, data bit have 648000, walking direction rail Zhou Changyue 24.48CM, and data bit has 612000, difference 36000
It is a, the 1/18 of angle measurement rail is accounted for, then needing to provide data bits by the method for " the every mistake 18 of angle measurement rail subtracts 1 " for walking direction rail
Amount.
5, above-mentioned measurement and set-up procedure are repeated until system under test (SUT) stops working.
More specifically, the setting of optical track unlike the optical code disk and DVD media disk or DVD data disk, DVD media
Optical track on disk or DVD data disk is a continuous helical shape, from the circle circle of outer ring one to contract.
Further specifically, the system under test (SUT) is the external equipment for needing measurement angle value, such as numerically-controlled machine tool, thunder
It reaches, elevator, robot etc.；
It further specifically, the rotation axis is partially coated with lubricating oil with what hole four contacted, turn rotation axis can freely
It moves and plays sealing function.
Further specifically, the optical code disk includes matrix, matrix setting is coated with reflecting layer and data Layer；Data Layer
The interval of two data bit is less than 1 micron；Reflecting layer is located at below data Layer.
Further specifically, the coding of the angle measurement rail recycles a Zhou Zucheng by " 10 ".In this way, being rotated in optical code disk
When, shaven head often reads one 1 or 0 counting is primary, illustrates not rotate if always 1 or 0.
Optical code disk principle are as follows: using DVD light read-write technology make optical code disk, DVD be coated in matrix reflecting layer and
Data Layer after data conversion is at binary system, burns pitting through laser on a data layer, has the place in hole that can appear reflecting layer,
When reading, laser is had the place in hole to reflect, and is just read as " 0 ", and the place in no hole is not reflected, and is read as
" 1 ", for example, 0.4 micron is divided between two data bit of DVD, it is per cm that 25000 data bit may be present, if a circle
There is 360*60*60=129600 data bit on all tracks, then the angle interval of each data bit is 1 second, a piece of band
There is the code-disc of such optical track, be read out with the mode of laser irradiation, the measurement of angle can be as accurate as 1 second, and with
The increase of optical track diameter, precision also will increase, and precision is 1 second when optical track diameter is 1.65 centimetres, and optical track diameter is 8.25 centimetres
Shi Jingdu is 0.2 second.
The principle of optical track are as follows: two optical tracks are set on optical code disk, and one is angle measurement rail, and coding recycles one week group by " 10 "
At when optical code disk rotates, shaven head often reads one 1 or 0 counting is primary, illustrates not rotate if always 1 or 0；One is
Walking direction rail, it is every to become 01 by one more than 1 one 0 and 00001 with 01001000100001 circulation one week as direction code
When be defined as increasing, be judged as rotating forward, it is every to become to be defined as reducing when 00001 by one 1 few one 0 and 01, be judged as anti-
Turn；Since in the coding of walking direction rail, containing continuous multiple " 0 ", the quantity of data bit must be provided in real time from angle measurement rail 12
It has turned over how many data bit.It is more bigger than walking direction rail diameter since angle measurement rail is in outer ring, by taking 0.2 second precision as an example, angle measurement
Rail Zhou Changyue 25.92CM, data bit have 648000, and walking direction rail Zhou Changyue 24.48CM, data bit has 612000, phase
Poor 36000, the 1/18 of angle measurement rail is accounted for, then needing to provide number by the method for " the every mistake 18 of angle measurement rail subtracts 1 " for walking direction rail
According to bit quantity.
By using above-mentioned technical proposal, the present invention has the following beneficial effects: high-precision angle measurement side of the invention
Method, measurement cost is low, and measurement accuracy is high, and use scope is extensive；Angle measurement rail and walking direction rail are especially dexterously devised, both
It may determine that angle rotation and bias direction, and simple method can be used and improve resolution ratio, it can be high under simple environment
Precision measure angle.
Detailed description of the invention
Fig. 1 is the angle-measuring equipment outline drawing of the high-precision angle-measuring method of this patent.
Fig. 2 is the internal structure chart of the angle-measuring equipment of the high-precision angle-measuring method of this patent.
Fig. 3 is the decomposition chart of the angle-measuring equipment of the high-precision angle-measuring method of this patent.
Fig. 4 is that figure is arranged in the optical track of the optical code disk of the angle-measuring equipment of the high-precision angle-measuring method of this patent.
The general DVD media disk or DVD data disk optical track schematic diagram that Fig. 5 is.
Fig. 6 is the optical track schematic diagram for the optical code disk of the high-precision angle-measuring method of this patent used.
In figure, 1- shell, 2- upper cover, 3- outlet hole, 4- master control borad, 5- single-chip microcontroller, 6- bearing, 7- rotation axis, 8- laser
Head, 9- motor, 10- screw rod, 11- optical code disk, 12- angle measurement rail, 13- walking direction rail, 14- mounting platform, the hole 15- one, the hole 16-
The hole two, 17- three, the hole 18- four, 19- power supply line -20- data line, 21- pedestal, 22- system under test (SUT).
Specific embodiment.
The present invention is further explained with reference to the accompanying drawing.But protection scope of the present invention is not limited to specifically implement
Mode.
High-precision angle-measuring method of the invention, utilizes the DVD disc of the optical track containing two circular concentrics, i.e. optical code disk
11, it is angle measurement rail 12, the inner ring walking direction rail 13 of outer ring respectively, the coding of angle measurement rail 12 recycles a Zhou Zucheng by " 10 "；Side
It to the coding for judging rail 13 characterized by " 01001000100001 ", i.e., is successively increased between " 1 " one " 0 ", such one week
As direction code；Optical code disk 11 is fixed on the mounting platform 14 that 7 middle part of rotation axis is set；Rotation axis 7 and system under test (SUT)
22 are connected, and when system under test (SUT) 22 rotates, rotation axis 7 can rotate with it and optical code disk 11 is driven to rotate；
The consistent laser head 8 of spacing of two spacing and two optical tracks, respectively face angle measurement are set below optical code disk 11
Rail 12, walking direction rail 13, laser head 8 are used to emit laser and receive the reflection laser of angle measurement rail 12 and walking direction rail 13；
It is logical to the data, data calculation and system under test (SUT) 22 for handling the reading of laser head 8 and transmission by control system
News, and according to the rotation of data control motor 9；
When system under test (SUT) 22 moves in the environment of shaking generates radial deflection, control system controls motor 9 and rotates, micro-
The position for adjusting laser head 8, makes laser head 8 be respectively aligned to angle measurement rail 12, walking direction rail 13；When generating axial dipole field, laser
First 8 adjust focal length according to bias size, and laser head 8 is enable accurately to read the data of quasi- angle measurement rail 12, walking direction rail 13；
According to the diameter difference of angle measurement rail 12 and walking direction rail 13, the data bit of angle measurement rail 12 and walking direction rail 13 is calculated
Difference and the difference account for 12 total data position ratio of angle measurement rail, and the data bit for calculating angle measurement rail 12 and walking direction rail 13 adjusts system
Number；The actual deviation angle of angle measurement rail 12 measured is calculated according to the adjustment factor；Repeat above-mentioned measurement and set-up procedure until
System under test (SUT) 22 stops working.
Concrete operation step are as follows:
1, optical code disk 11 of the production comprising angle measurement rail 12, walking direction rail 13；Two optical tracks of setting on optical code disk 11, one
For angle measurement rail 12, coding recycles a Zhou Zucheng by " 10 ", and when optical code disk 11 rotates, shaven head often reads one 1 or 0 counting one
It is secondary, illustrate not rotate if always 1 or 0；One is walking direction rail 13, with
010010001000010000010000001 circulation one week is every to become by one more than 1 one 0 and 0000001 as direction code
It is defined as increasing when 01, is judged as rotating forward, it is every to become to be defined as reducing when 0000001 by one 1 few one 0 and 01, judge
For reversion；Since in the coding of walking direction rail 13, containing continuous multiple " 0 ", the number of data bit must be provided in real time by angle measurement rail 12
It has turned over how many data bit known to amount.
2, installation obtains angle-measuring equipment, so that:
Shell 1 and upper cover 2 form the space of a sealing；Internal power cord 19 and data line 20 are from 1 outer rim of shell
Outlet hole 3 is drawn；Power supply line 19 is set for system；Data line 20 is connected into master control borad 4 and system under test (SUT) 22；
Optical code disk 11 is installed on the mounting platform 14 at 7 middle part of rotation axis；
The outer ring of bearing 6 being mounted in the hole 1 of 1 bottom of shell, 7 bottom end of rotation axis is mounted on the inner ring of bearing 6,
Master control borad 4 is fixed in shell 1, and rotation axis 7 passes through the hole 3 17 at the hole 2 16 at 4 center of master control borad, 11 center of optical code disk, rotation
Mounting platform 14 on axis 7 is located above master control borad 4, and optical code disk 11 is fixedly mounted on mounting platform 14, and 7 top of rotation axis is worn
The hole 4 18 at upper cover center is crossed, the part that rotation axis 7 stretches out case top lid 2 is connected with system under test (SUT) 22, so that when tested system
When 22 rotation of system, rotation axis 7 can rotate with it and optical code disk 11 is driven to rotate；
Single-chip microcontroller 5, motor 9, power supply line 19, data line 20 are arranged on master control borad 4,10 one end of screw rod and motor 9 connect
It connects, pedestal 21 is connected with screw rod 10, and two laser heads 8 are mounted on pedestal 21, for emitting laser and receiving optical code disk 11
Angle measurement rail 12 and walking direction rail 13 reflection laser；
3, it is powered on to measuring device, self-test enters working condition after passing through；
4, when system under test (SUT) 22 generates rotation, rotation axis 7 rotates with it and optical code disk 11 is driven to rotate, two laser heads
8 read the data of corresponding optical track simultaneously, this data is converted into angle value and rotation direction after being input to single-chip microcontroller 5, and passes through
Data line 20 is output to system under test (SUT) 22；
When system under test (SUT) 22 moves in the environment of shaking generates radial deflection, single-chip microcontroller 5 controls motor 9 and rotates, micro-
The position for adjusting laser head 8, makes laser head 8 be respectively aligned to angle measurement rail 12, walking direction rail 13；When generating axial dipole field, laser
First 8 adjust focal length according to bias size, and laser head 8 is enable accurately to read the data of quasi- angle measurement rail 12, walking direction rail 13；
According to the diameter difference of angle measurement rail 12 and walking direction rail 13, the data bit of angle measurement rail 12 and walking direction rail 13 is calculated
Difference and the difference account for angle measurement rail total data position ratio, and the data bit for calculating angle measurement rail 12 and walking direction rail 13 adjusts system
Number；The actual deviation angle of angle measurement rail 12 measured is calculated according to the adjustment factor；
It is more bigger than 13 diameter of walking direction rail such as since angle measurement rail 12 is in outer ring, by taking 0.2 second precision as an example, angle measurement rail
It is about within 12 weeks 25.92CM, data bit has 648000, is about 24.48CM within walking direction rail 13 weeks, and data bit has 612000,
Difference 36000, accounts for the 1/18 of angle measurement rail 12, then needing by the method for " the every mistake 18 of angle measurement rail 12 subtracts 1 " to be walking direction rail
13 provide number of data bits.
5, above-mentioned measurement and set-up procedure are repeated until system under test (SUT) 22 stops working.
Claims (5)
1. a kind of high-precision angle-measuring method, it is characterized in that: using the DVD disc of the optical track containing two circular concentrics, DVD disc is
Optical code disk, the optical track of two circular concentrics are the angle measurement rail of outer ring, inner ring walking direction rail respectively, and the coding of angle measurement rail is by " 10 "
Recycle a Zhou Zucheng；The coding of walking direction rail successively increases one characterized by " 01001000100001 " between " 1 "
" 0 " is used as direction code in such one week；Optical code disk is fixed on the mounting platform being arranged in the middle part of rotation axis；Rotation axis and quilt
Examining system is connected, and when system under test (SUT) rotates, rotation axis can rotate with it and optical code disk is driven to rotate；It is set below optical code disk
The consistent laser head of spacing of two spacing Yu two optical tracks is set, respectively face angle measurement rail, walking direction rail, laser head is used to send out
It penetrates laser and receives the reflection laser of angle measurement rail and walking direction rail；The number that control system reads and transmits to handle laser head
It is communicated according to, data calculation, with system under test (SUT), and controls the rotation of motor according to data；When system under test (SUT) is in the environment of shaking
When movement generates radial deflection, control system controls motor rotation, finely tunes the position of laser head, laser head is made to be respectively aligned to angle measurement
Rail, walking direction rail；When generating axial dipole field, laser head adjusts focal length according to bias size, and laser head is enable accurately to read
The data of quasi- angle measurement rail, walking direction rail；According to the diameter difference of angle measurement rail and walking direction rail, angle measurement rail and walking direction are calculated
The data bit difference and the difference of rail account for angle measurement rail total data position ratio, calculate the data bit tune of angle measurement rail and walking direction rail
Save coefficient；The actual deviation angle of angle measurement rail measured is calculated according to the adjustment factor；It repeats above-mentioned measurement and set-up procedure is straight
It stops working to system under test (SUT).
2. high-precision angle-measuring method according to claim 1, it is characterized in that: specific steps are as follows:
(1), optical code disk of the production comprising angle measurement rail, walking direction rail；
(2), installation obtains angle-measuring equipment, so that:
Shell and upper cover form the space of a sealing；Internal power cord and data line are drawn from the outlet hole in shell outer rim；
Power supply line is set for system；Data line is connected into master control borad and system under test (SUT)；
Optical code disk is installed on the mounting platform in the middle part of rotation axis；The outer ring of bearing is mounted in the hole one of housing bottom, is turned
Moving axis bottom end is mounted on the inner ring of bearing, and master control borad is immobilized in the shell, and rotation axis passes through the hole two at master control borad center, optical code disk
The hole three at center, the mounting platform in rotation axis are located above master control borad, and optical code disk is fixedly mounted on mounting platform, rotation axis
Top passes through the Kong Si at upper cover center, and the part that rotation axis stretches out case top lid is connected with system under test (SUT), so that when tested system
When system rotation, rotation axis can rotate with it and optical code disk is driven to rotate；Single-chip microcontroller, motor, power supply line, data line setting are existed
On master control borad, screw rod one end is connected to motor, and pedestal is connected with screw rod, and two laser heads are mounted on the base, for emitting
The reflection laser of the angle measurement rail and walking direction rail of laser and reception optical code disk；
(3), it is powered on to measuring device, self-test enters working condition after passing through；
(4), when system under test (SUT) generates rotation, rotation axis rotates with it and optical code disk is driven to rotate, and two laser heads are read simultaneously
It is converted into angle value and rotation direction after taking the data of corresponding optical track, this data to be input to single-chip microcontroller, and defeated by data line
System under test (SUT) is arrived out；When system under test (SUT) moves in the environment of shaking generates radial deflection, single-chip microcontroller controls motor rotation, micro-
The position for adjusting laser head, makes laser head be respectively aligned to angle measurement rail, walking direction rail；When generating axial dipole field, laser head according to
Bias size adjusts focal length, and laser head is enable accurately to read the data of quasi- angle measurement rail, walking direction rail；According to angle measurement rail and direction
Judge the diameter difference of rail, the data bit difference and the difference for calculating angle measurement rail and walking direction rail account for angle measurement rail total data position ratio
Example calculates the data bit adjustment factor of angle measurement rail and walking direction rail；The reality of angle measurement rail measured is calculated according to the adjustment factor
Border misalignment angle；
(5), above-mentioned measurement and set-up procedure are repeated until system under test (SUT) stops working.
3. high-precision angle-measuring method according to claim 1, it is characterized in that: the optical code disk includes matrix, matrix
Setting is coated with reflecting layer and data Layer；The interval of two data bit of data Layer is less than 1 micron；Reflecting layer is located under data Layer
Side.
4. high-precision angle-measuring method according to claim 1, it is characterized in that: the system under test (SUT) is to need to measure angle
The external equipment of angle value.
5. high-precision angle-measuring method according to claim 2, it is characterized in that: the portion that the rotation axis is contacted with hole four
Divide and be coated with lubricating oil, keeps rotation axis free to rotate and play sealing function.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611028388.1A CN106767538B (en) | 2016-11-22 | 2016-11-22 | A kind of high-precision angle-measuring method |
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| CN201611028388.1A CN106767538B (en) | 2016-11-22 | 2016-11-22 | A kind of high-precision angle-measuring method |
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| CN106767538B true CN106767538B (en) | 2019-03-12 |
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| CN116642438B (en) * | 2023-07-26 | 2024-02-09 | 东莞市冠隆机械设备有限公司 | Angle measuring device of high-precision turntable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4740691A (en) * | 1984-08-16 | 1988-04-26 | Fanuc Ltd. | Optical rotary encoder and method of assembling the same |
| US6330522B1 (en) * | 1998-09-17 | 2001-12-11 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Rotational angle detector and method |
| CN201780116U (en) * | 2010-08-20 | 2011-03-30 | 西南交通大学 | Photoelectric encoder for detecting rotation speed and rotation angle of rotating objects |
| CN102203562A (en) * | 2008-10-30 | 2011-09-28 | 约翰尼斯海登海恩博士股份有限公司 | Absolute angle code and angle measuring device |
| CN105627921A (en) * | 2015-12-18 | 2016-06-01 | 佛山轻子精密测控技术有限公司 | Absolute encoder subdivision acquisition system and measurement method thereof |
-
2016
- 2016-11-22 CN CN201611028388.1A patent/CN106767538B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4740691A (en) * | 1984-08-16 | 1988-04-26 | Fanuc Ltd. | Optical rotary encoder and method of assembling the same |
| US6330522B1 (en) * | 1998-09-17 | 2001-12-11 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Rotational angle detector and method |
| CN102203562A (en) * | 2008-10-30 | 2011-09-28 | 约翰尼斯海登海恩博士股份有限公司 | Absolute angle code and angle measuring device |
| CN201780116U (en) * | 2010-08-20 | 2011-03-30 | 西南交通大学 | Photoelectric encoder for detecting rotation speed and rotation angle of rotating objects |
| CN105627921A (en) * | 2015-12-18 | 2016-06-01 | 佛山轻子精密测控技术有限公司 | Absolute encoder subdivision acquisition system and measurement method thereof |
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| CN106767538A (en) | 2017-05-31 |
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