CN104567742A - Novel displacement measurement device and method - Google Patents
Novel displacement measurement device and method Download PDFInfo
- Publication number
- CN104567742A CN104567742A CN201510007787.9A CN201510007787A CN104567742A CN 104567742 A CN104567742 A CN 104567742A CN 201510007787 A CN201510007787 A CN 201510007787A CN 104567742 A CN104567742 A CN 104567742A
- Authority
- CN
- China
- Prior art keywords
- array element
- light
- sensitive array
- data processing
- processing module
- 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.)
- Pending
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a novel displacement measurement device, and belongs to the field of measurement devices. The novel displacement measurement device comprises a rotating shaft, a laser light source, a photosensitive array element set and a data processing module. The laser light source is fixedly mounted on the rotating shaft, the photosensitive array element set is arranged around the rotating shaft in an annular mode, and the data processing module is connected with the photosensitive array element set. The invention further discloses a measurement method of the device. When the device works, the rotating shaft and a measured shaft make synchronous rotating movement, laser beams rotate along with the rotating shaft, light spots are formed on the photosensitive array element set, photosensitive units which receive the light spots generate electrical signals to be transmitted to the data processing module, the data processing module calculates the absolute rotating position of the measured shaft corresponding to the light spots according to the address information of the photosensitive units, and therefore the technical problem that the precision of an encoder in the prior art is limited by a photoelectric encoder is solved.
Description
Technical field
The present invention relates to measurement mechanism, relate to a kind of novel displacement measuring device and measuring method thereof particularly.
Background technology
Displacement transducer to be gathered around as lathe, robot, production line, elevator etc. at industrial circle and is widely used, the service precision of these machine tools depends on the precision of displacement transducer to a great extent, and displacement transducer widely uses the most with scrambler, can measured angular displacement or straight-line displacement.Scrambler most is at present the device of core with photoelectric code disk based on grating process, and the dividing precision of photoelectric code disk determines the service precision of scrambler, and the precision of photoelectric code disk is higher, and its difficulty of processing is also higher, and the process-cycle is longer, and cost of manufacture is huge.
Summary of the invention
The object of the present invention is to provide a kind of novel displacement measuring device to solve the technical matters of prior art scrambler measuring accuracy by photoelectric code disk restriction.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of novel displacement measuring device, comprise rotating shaft, LASER Light Source, light-sensitive array element group and data processing module, described LASER Light Source is fixedly installed in described rotating shaft, described light-sensitive array element group annular configuration is around rotating shaft, described data processing module is connected with this light-sensitive array element group, during the work of this device, rotating shaft and measured axis are made synchronous rotary and are moved, laser beam rotates with rotating shaft, light-sensitive array element group forms hot spot, the photosensitive unit being subject to hot spot produces electric signal transmission to data processing module, data processing module is according to the address information of photosensitive unit, calculate the absolute rotational position of measured axis corresponding to hot spot.
One as the technical program is improved, described light-sensitive array element group is made up of the light-sensitive array element being not less than three quantity, also can be the light-sensitive array element in closed hoop of customization, this light-sensitive array element group be arranged in around rotating shaft in the form of a ring; This light-sensitive array element can be cmos image sensor, and ccd image sensor etc. are by the integrated array element of photosensitive unit.
Another kind as the technical program improves, and described data processing module is for driving described light-sensitive array element group.
As another improvement of the technical program, described data processing module comprises signal screening unit, position operation processing unit, this signal screening unit is used for screening the signal from light-sensitive array element group, this position operation processing unit is used for calculating the signal that this signal screening sieve unit is selected, and calculates the absolute rotational position of measured axis corresponding to hot spot.
Meanwhile, present invention also offers the measuring method of this novel displacement measuring device, specifically comprise the following steps:
S1, to be connected with measured axis by the rotating shaft of shaft coupling by this device, to make to do synchronous rotary with measured axis and move, LASER Light Source energising simultaneously, sends laser;
S2, light-sensitive array element group receive laser, and light-sensitive array element group forms hot spot, and light signal is converted to electric signal by the image sensor element unit being subject to hot spot;
Signal screening unit in S3, data processing module screens the electric signal in step S2, and export screening this screened go out the column address i of electric signal;
Position operation processing unit in S4, data processing module to the column address i exported in step S3 carry out identification calculate, calculate measured axis angle;
S5, step S4 is drawn measured axis angular position information export.
Further, the computing method in described step S4 are specifically made up of following formula:
Wherein: k is the column address of o point; O point is the subpoint of shaft axis center on light-sensitive array element;
D is the column pitch of light activated element unit;
H is the distance of shaft axis center to o point.
The present invention compared with prior art, has following technical advantage:
The present invention is with rotating shaft, LASER Light Source, light-sensitive array element group, and a kind of novel displacement measuring device of data processing module composition, during the work of this device, rotating shaft and measured axis are made synchronous rotary and are moved, laser beam rotates with rotating shaft, light-sensitive array element group forms hot spot, the photosensitive unit being subject to hot spot produces electric signal transmission to data processing module, data processing module is according to the address information of photosensitive unit, thus calculate the absolute rotational position of measured axis corresponding to hot spot, the precision of apparatus of the present invention depends on the dimensions of the photosensitive unit of light-sensitive array element and the shaft axis center distance h to o point, array cell sizes is less, distance h is larger, the measuring accuracy of device is higher.When photosensitive unit is of a size of 2.2um × 2.2um, h=20mm, measuring accuracy can reach ± and 3.6 ", resolution can reach more higher than the measurement level of precision through software and hardware segmentation.
Accompanying drawing explanation
Fig. 1 is the structural representation of displacement measuring device novel in embodiment one;
Fig. 2 is photosensitive-cell array in embodiment one and light spot shape schematic diagram
Fig. 3 is the schematic diagram of data processing module in embodiment one;
Fig. 4 is the measuring method process flow diagram of displacement measuring device novel in embodiment two;
Fig. 5 is the position calculation schematic diagram in embodiment two;
In figure: 1 rotating shaft, 2 LASER Light Source, 3 light-sensitive array element groups, 4 data processing modules, 2a point-like laser, 2b mono-word laser, 41 signal screening unit, 42 position operation processing unit.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent.
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, be clearly and completely described the technical scheme in the present invention, obviously, described embodiment is only a part of embodiment of invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
As shown in Figure 1, for the structural representation of displacement measuring device novel in the present embodiment, this device comprises rotating shaft 1, LASER Light Source 2 is fixedly installed in described rotating shaft 1, as shown in Figure 2, LASER Light Source 2 can be point-like laser 2a, also can be a word laser 2b, the light curtain face of one word laser 2b is vertical with paper, namely rotating shaft 1 axle center be parallel to constantly or launch light curtain face on, in the present embodiment, LASER Light Source 2 adopts a word laser 2b, light-sensitive array element group annular configuration is around rotating shaft, in the present embodiment, light-sensitive array element group 3 is made up of four light-sensitive array elements, during installation, photosurface is closed into annular configuration around rotating shaft on the axial visual angle of rotating shaft 1, this light-sensitive array element is cmos image sensor, the distribution of this photosensitive-cell array as shown in Figure 2, this array is linear array, may also be face battle array, the mode of linear array is adopted in the present embodiment, data processing module 4 is connected (not shown) with this light-sensitive array element group 3, this data processing module 4 is for driving described light-sensitive array element group 3, this data processing module 4 as shown in Figure 3 simultaneously, comprise signal screening unit 41, position operation processing unit 42, this signal screening unit 41 is for screening the signal from light-sensitive array element group 3, this position operation processing unit 42 calculates for the signal filtered out this this signal screening unit 41, calculate the absolute rotational position of measured axis corresponding to hot spot, with FPGA executive signal screening function in the present embodiment, by DSP executing location operation processing unit function.
Embodiment two
The present embodiment is the measuring method of novel displacement measuring device, as shown in Figure 4, specifically comprises the following steps:
S1, to be connected with measured axis by the rotating shaft of shaft coupling by this device, and to do synchronous rotary with measured axis and move, LASER Light Source energising simultaneously, sends laser;
S2, light-sensitive array element group receive laser, and light-sensitive array element group forms hot spot, and light signal is converted to electric signal by the image sensor element unit being subject to hot spot;
Signal screening unit in S3, data processing module screens the electric signal in step S2, and export screening this screened go out the column address i of electric signal;
Position operation processing unit in S4, data processing module to the column address i exported in step S3 carry out identification calculate, calculate measured axis angle;
S5, step S4 is drawn measured axis angular position information export.
Wherein, for the every sheet independent light sensitive array element in light-sensitive array element group, as shown in Figure 5, be the computing method in step S4, have following mathematical relation,
o is the subpoint of shaft axis center on light-sensitive array element, x is the position of laser beam on light-sensitive array element, h is the distance of shaft axis center to o point, ox is the coordinate position of laser spot on light-sensitive array element, and coordinate position is by data processing module identification and calculate; If the column address of o point is k, the column pitch of photosensitive unit is d, then
; For the anglec of rotation measuring axle, unique light-sensitive array element angle is had to be mapped,
, namely the measurement of this device is absolute.
Embodiment three
The present embodiment is by measuring method in the novel displacement measuring device in conjunction with the embodiments in one and embodiment two;
Centered by rotating shaft, four linear CMOS image sensors between two at right angle setting are centered around around rotating shaft, clockwise direction is respectively first, second, third and fourth linear array, photosurface surrounds a square, specifies 0,90,180,360 of the corresponding rotating shaft angle of square length of side center position difference.
During operation result of measurement, for linear array numbering j, thus operational formula has
, result value scope is-45
< θ <315, further numerical value conversion, has
, this
θvalue is measurement result.
More than that better enforcement of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (6)
1. a novel displacement measuring device, it is characterized in that, comprise rotating shaft, LASER Light Source, light-sensitive array element group and data processing module, described LASER Light Source is fixedly installed in described rotating shaft, described light-sensitive array element group annular configuration is around rotating shaft, and described data processing module is connected with this light-sensitive array element group.
2. a kind of novel displacement measuring device as claimed in claim 1, is characterized in that, described light-sensitive array element group is not less than the light-sensitive array element of three by quantity or the light-sensitive array element in closed hoop of customization is formed.
3. a kind of novel displacement measuring device as claimed in claim 1, is characterized in that, described data processing module is for driving described light-sensitive array element group.
4. a kind of novel displacement measuring device as claimed in claim 1, it is characterized in that, described data processing module comprises signal screening unit, position operation processing unit, this signal screening unit is used for screening the signal from light-sensitive array element group, this position operation processing unit is used for calculating the signal that this signal screening sieve unit is selected, and calculates the absolute rotational position of measured axis corresponding to hot spot.
5. a measuring method for a kind of novel displacement measuring device as claimed in claim 1, is characterized in that, comprise the following steps:
S1, to be connected with measured axis by the rotating shaft of shaft coupling by this device, to make to do synchronous rotary with measured axis and move, LASER Light Source energising simultaneously, sends laser;
S2, light-sensitive array element group receive laser, and light-sensitive array element group forms hot spot, and light signal is converted to electric signal by the image sensor element unit being subject to hot spot;
Signal screening unit in S3, data processing module screens the electric signal in step S2, and export screening this screened go out the column address i of electric signal;
Position operation processing unit in S4, data processing module to the column address i exported in step S3 carry out identification calculate, calculate measured axis angle;
S5, step S4 is drawn measured axis angular position information export.
6. the measuring method of a kind of novel displacement measuring device as claimed in claim 5, it is characterized in that, the computing method in described step S4 are specifically made up of following formula:
Wherein: k is the column address of o point; O point is the subpoint of shaft axis center on light-sensitive array element
D is the column pitch of light activated element unit;
H is the distance of shaft axis center to o point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007787.9A CN104567742A (en) | 2015-01-08 | 2015-01-08 | Novel displacement measurement device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007787.9A CN104567742A (en) | 2015-01-08 | 2015-01-08 | Novel displacement measurement device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104567742A true CN104567742A (en) | 2015-04-29 |
Family
ID=53084367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510007787.9A Pending CN104567742A (en) | 2015-01-08 | 2015-01-08 | Novel displacement measurement device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104567742A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949855A (en) * | 2017-03-03 | 2017-07-14 | 四川大学 | A kind of rotating shaft angular travel measurement apparatus |
| CN108627122A (en) * | 2018-04-26 | 2018-10-09 | 大连理工大学 | A kind of angle displacement measuring device and its application method |
| CN110186399A (en) * | 2019-06-20 | 2019-08-30 | 珠海格力电器股份有限公司 | Driver positioning accuracy detection device and method |
| CN112504129A (en) * | 2020-10-30 | 2021-03-16 | 北京全路通信信号研究设计院集团有限公司 | Non-contact multi-rail crawling displacement monitoring method and monitoring system based on laser detection |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0453778A2 (en) * | 1990-04-27 | 1991-10-30 | Dr. Johannes Heidenhain GmbH | Angle measuring device |
| SU1696856A1 (en) * | 1988-11-21 | 1991-12-07 | Предприятие П/Я Х-5827 | Device for measuring angle of shaft turning |
| CN101995233A (en) * | 2010-09-10 | 2011-03-30 | 曹彦波 | Angle measuring method for sun precision tracking and digital photoelectric angle sensor |
| CN202630909U (en) * | 2012-05-29 | 2012-12-26 | 梁友明 | Rotary scan laser detector with photosensitive linear array |
| CN102914277A (en) * | 2012-10-17 | 2013-02-06 | 重庆大学 | Photoelectric sensor for measuring angular displacement of rotating shaft and measurement method thereof |
| CN203658381U (en) * | 2013-12-29 | 2014-06-18 | 国家电网公司 | Radial light emission-type CCD rotation speed detection base device |
-
2015
- 2015-01-08 CN CN201510007787.9A patent/CN104567742A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1696856A1 (en) * | 1988-11-21 | 1991-12-07 | Предприятие П/Я Х-5827 | Device for measuring angle of shaft turning |
| EP0453778A2 (en) * | 1990-04-27 | 1991-10-30 | Dr. Johannes Heidenhain GmbH | Angle measuring device |
| EP0453778A3 (en) * | 1990-04-27 | 1992-09-23 | Dr. Johannes Heidenhain Gmbh | Angle measuring device |
| CN101995233A (en) * | 2010-09-10 | 2011-03-30 | 曹彦波 | Angle measuring method for sun precision tracking and digital photoelectric angle sensor |
| CN202630909U (en) * | 2012-05-29 | 2012-12-26 | 梁友明 | Rotary scan laser detector with photosensitive linear array |
| CN102914277A (en) * | 2012-10-17 | 2013-02-06 | 重庆大学 | Photoelectric sensor for measuring angular displacement of rotating shaft and measurement method thereof |
| CN203658381U (en) * | 2013-12-29 | 2014-06-18 | 国家电网公司 | Radial light emission-type CCD rotation speed detection base device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949855A (en) * | 2017-03-03 | 2017-07-14 | 四川大学 | A kind of rotating shaft angular travel measurement apparatus |
| CN106949855B (en) * | 2017-03-03 | 2023-08-15 | 四川大学 | Rotating shaft angular displacement measuring device |
| CN108627122A (en) * | 2018-04-26 | 2018-10-09 | 大连理工大学 | A kind of angle displacement measuring device and its application method |
| CN110186399A (en) * | 2019-06-20 | 2019-08-30 | 珠海格力电器股份有限公司 | Driver positioning accuracy detection device and method |
| CN112504129A (en) * | 2020-10-30 | 2021-03-16 | 北京全路通信信号研究设计院集团有限公司 | Non-contact multi-rail crawling displacement monitoring method and monitoring system based on laser detection |
| CN112504129B (en) * | 2020-10-30 | 2022-08-12 | 北京全路通信信号研究设计院集团有限公司 | Non-contact multi-rail crawling displacement monitoring method and monitoring system based on laser detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104457806B (en) | Composite type rotary encoder and measurement method thereof | |
| CN104567742A (en) | Novel displacement measurement device and method | |
| EP2546612B1 (en) | Method for working out the angular position of a rotating element and device for carrying out such a method | |
| CN105387817A (en) | Device for rapidly detecting size parameters of cylinder type excircle shape | |
| CN104482948B (en) | A kind of high-precision rotary encoder and measuring method thereof | |
| CN109357631A (en) | A kind of measuring system center scaling method based on laser displacement sensor | |
| CN105651320B (en) | A kind of photoelectric encoder | |
| CN104634367B (en) | A kind of magneto-electric absolute position transducer of Large central aperture structure and the method for measurement absolute position | |
| CN205192431U (en) | Case valve barrel parameter automatic checkout device | |
| CN104567740A (en) | Angular displacement measurement device and measurement method thereof | |
| CN103718004A (en) | Servomotor production method, servomotor production device, servomotor, and encoder | |
| CN104567741B (en) | A kind of new angle displacement measuring device and its measuring method | |
| CN102122144A (en) | Numerical control system for detecting cam contours | |
| CN103759753B (en) | A kind of grating photoelectric speed testing device | |
| CN203464945U (en) | Single-loop absolute value coding disc | |
| CN104567743A (en) | Angle displacement measurement device and measurement method thereof | |
| CN100578156C (en) | Photoelectric angle sensor | |
| CN202092660U (en) | Scenery simulator applicable to TDI (Transport Driver Interface) camera | |
| CN106525090B (en) | A kind of band individual pen absolute value forces torque motor increment type coding disk | |
| CN204373621U (en) | A kind of Novel angle displacement measuring device | |
| CN103063165B (en) | Optoelectronic angle sensor | |
| CN104567745A (en) | Rotary encoder based on light sensation principle and measuring method thereof | |
| CN116295550A (en) | Novel photoelectric encoder code wheel design method | |
| CN108759878B (en) | Absolute encoder, motor control method and related components | |
| CN102944254A (en) | Rotary encoder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Zhicheng Inventor after: Wang Xinli Inventor before: Wang Xinli |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |