CN108931196A - Fly to clap the high precision measuring device latched and its application method based on grating scale high speed - Google Patents
Fly to clap the high precision measuring device latched and its application method based on grating scale high speed Download PDFInfo
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- CN108931196A CN108931196A CN201810873540.9A CN201810873540A CN108931196A CN 108931196 A CN108931196 A CN 108931196A CN 201810873540 A CN201810873540 A CN 201810873540A CN 108931196 A CN108931196 A CN 108931196A
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- grating scale
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- high speed
- clap
- characteristic point
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 238000009960 carding Methods 0.000 claims description 14
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 19
- 230000006978 adaptation Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
Classifications
-
- 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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention discloses and provides a kind of high precision measuring device and its application method for flying to clap latch based on grating scale high speed, and measurement accuracy is high, and hardware cost is low, and structure is simple, and speed of taking pictures is fast.The technical scheme adopted by the invention is that: the present invention includes a kind of high precision measuring device for flying to clap latch based on grating scale high speed, it includes camera model, grating scale module and two groups of symmetrically arranged straight-line motion mechanisms, straight-line motion mechanism includes bracket and the ball screw for being arranged at frame upper, shaft coupling and driving motor, adaptation is provided with nut slider on ball screw, camera model includes camera and camera mounting base, the two sides of camera mounting base are fixedly connected with the nut slider in two groups of straight-line motion mechanisms respectively, grating scale module includes grating scale and reading head, reading head is connected with nut slider, the axial direction on bracket and being parallel to ball screw is arranged in grating scale.The present invention can be used for the technical field of long range measuring technology application.
Description
Technical field
Fly to clap the high precision measuring device latched and its application method based on grating scale high speed the present invention relates to a kind of.
Background technique
If to realize length on free hand drawing away from high-acruracy survey, the high camera of gesture necessary choice pixel matches small multiplying power camera lens,
It is more than also can not to a certain degree apart from the configuration of current hardware highest if the longer hardware cost of measurement distance increases at geometric multiple
Reach measurement request.Camera pixel is higher, and the more big corresponding weight and volume of lens ratio also increases, and then increases structure space
The complexity of design.
Conventional long-range measurement structure exists following insufficient:
1) measurement accuracy is poor, data inaccuracy.Conventional measurement structure is all camera to be hung in straight line mould group, by controlling motor
It takes pictures on two measurement end positions of AB respectively, is then to survey two characteristics of image position deviation superimposed motor move distances
Span is from such measurement has ignored motor movement in place completely has vibration to determine process error, motor gear or shaft coupling torsion gap
Error, screw rod gap error, environment space temperature expansion error etc., these errors directly affect measurement accuracy, structural member
Loosening also will cause measurement data mistake.
2) hardware cost is high, and structure is complicated.If measurement apart from larger and be not desired to sacrifice in measurement accuracy, must select big picture
Plain camera and small multiplying power camera lens, scheme cost is with regard to high；The weight and volume of high pixel camera and small multiplying power camera lens is all bigger,
Increase the complexity of structure design.
Summary of the invention
Fly to clap the high-acruracy survey dress latched based on grating scale high speed the technical problem to be solved in the present invention is to provide a kind of
It sets and its application method, measurement accuracy is high, and hardware cost is low, and structure is simple, and speed of taking pictures is fast.
The technical scheme adopted by the invention is that: the present invention includes a kind of high-precision for flying to clap latch based on grating scale high speed
Measuring device, it includes camera model, grating scale module and two groups of symmetrically arranged straight-line motion mechanisms, the linear motion machine
Structure includes bracket and the ball screw, shaft coupling and driving motor for being arranged at the frame upper, on the ball screw
Adaptation is provided with nut slider, and the camera model includes camera and camera mounting base, the two sides difference of the camera mounting base
It being fixedly connected with the nut slider in straight-line motion mechanism described in two groups, the grating scale module includes grating scale and reading head,
The reading head is connected with the nut slider, and the grating scale is arranged on the bracket and is parallel to the ball screw
Axial direction.
Further, it further includes PLC module, the PLC module include encoder acquisition unit, speedy carding process unit and
High speed input unit, the encoder acquisition unit for acquiring grating scale data, the speedy carding process unit and camera in real time
Match to merge and take pictures for triggering camera, the high speed input unit is matched with the reading head signal and merged for latching current light
Grid ruler location information.
Further, the camera is provided with station of taking pictures on motion path, and the speedy carding process unit is mounted on institute
It states on bracket and corresponds at the station of taking pictures, be provided on the camera and connect with what the speedy carding process cell signal cooperated
Device is received, the encoder acquisition unit and the high speed input unit are installed in camera mounting base.
Further, the upper inner of the bracket is provided with linear guide, the linear guide and the ball screw
Parallel, the bottom of the camera mounting base is provided with the sliding block being slidingly fitted with the linear guide.
Further, the linear guide is provided with inner groovy on the two sides of width direction, and the bottom of the sliding block is set
It is equipped with card slot compatible with the top of the linear guide.
The invention also includes a kind of to fly to clap the application method of the high precision measuring device latched based on grating scale high speed, it is wrapped
Include following steps:
A, A characteristic point and B characteristic point are marked on product to be measured, and the grid scaling board of 1*1mm is placed in the visual field of camera；
B, start driving motor, camera model is enabled to move along a straight line；
C, camera model successively moves to the corresponding A characteristic point pre-set and B characteristic point is taken pictures on station, speedy carding process list
Member triggering camera and to taking pictures, while triggering high speed input unit and latching the position of current raster ruler, and obtaining A spy in succession
Levy the image 1 of point and the image 2 of B characteristic point；
D, the deviation (S1) of A feature in image 1 is recorded, the deviation (S3) of B feature in grating scale spacing (S2) and image 2, meter
Calculate characteristic point distance: distance (S1)+(S2)+(S3) of characteristic point.
Further, step B- step D is repeated, distance, the deviation (S1) of A feature, grating scale of multiple groups characteristic point are obtained
The value and record of the deviation (S3) of spacing (S2) and B feature are taken pictures the repeatability of fixing line distance for verifying AB two o'clock.
Further, number of repetition is 100 times.
The invention has the benefit that directly reacting the real data of tache motorice present invention introduces grating scale module, taking pictures
Moment latches grating scale current location, it is ensured that image and physical location really correspond to, and eliminate what control terminal and tache motorice introduced
Any error, greatly improves measurement accuracy；The present invention uses grating scale actual measurement, can choose small pixel camera and general
Logical multiplying power camera lens does not all influence precision completely, greatly reduces development cost.The present invention solves asking for high Cost Design hardly possible
Topic, greatly improves the competitiveness of product.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the measuring device in the present invention；
Fig. 2 is the cooperation schematic diagram of PLC module Yu grating scale and camera；
Fig. 3 is operation principle schematic diagram；
Fig. 4 is the line chart of 1 deviation of image (S1)；
Fig. 5 is the line chart of grating scale spacing (S2)；
Fig. 6 is the line chart of 2 deviation of image (S3)；
Fig. 7 is the line chart for measuring distance.
Specific embodiment
As shown in Figure 1 to Figure 3, a specific embodiment of the invention is: the present invention includes a kind of winged based on grating scale high speed
The high precision measuring device latched is clapped, it includes camera model, grating scale module and two groups of symmetrically arranged straight-line motion mechanisms,
The straight-line motion mechanism includes bracket 1 and the ball screw 2 for being arranged at 1 top of bracket, shaft coupling 3 and driving electricity
Machine 4, adaptation is provided with nut slider 5 on the ball screw 2, and the camera model includes camera 6 and camera mounting base 7, institute
The two sides for stating camera mounting base 7 are fixedly connected with the nut slider 5 in straight-line motion mechanism described in two groups respectively, the grating scale
Module includes grating scale 8 and reading head 9, and the reading head 9 is connected with the nut slider 5, and the grating scale 8 is arranged in institute
State on bracket 1 and be parallel to the axial direction of the ball screw 2.
Further, it further includes PLC module 10, and the PLC module 10 includes encoder acquisition unit 11, speedy carding process
Unit 12 and high speed input unit 13, for the encoder acquisition unit 11 for acquiring grating scale data in real time, the high speed is defeated
Unit 12 merges with the matching of camera 6 and takes pictures for triggering camera 6 out, the high speed input unit 13 and 9 signal of reading head
With merging for latching current raster ruler location information.
Further, the camera 6 is provided with station of taking pictures on motion path, and the speedy carding process unit 12 is mounted on
It is on the bracket 1 and corresponding at the station of taking pictures, it is provided on the camera 6 and matches with 12 signal of speedy carding process unit
The receiver of conjunction, the encoder acquisition unit 11 and the high speed input unit 13 are installed in camera mounting base 7.
Further, the upper inner of the bracket 1 is provided with linear guide 14, the linear guide 14 and the ball
Screw rod 2 is parallel, and the bottom of the camera mounting base 7 is provided with the sliding block 15 being slidingly fitted with the linear guide 14.
Further, the linear guide 14 is provided with inner groovy, the bottom of the sliding block 15 on the two sides of width direction
Portion is provided with card slot compatible with the top of the linear guide 14.
The invention also includes a kind of to fly to clap the application method of the high precision measuring device latched based on grating scale high speed, it is wrapped
Include following steps:
A, A characteristic point 16 and B characteristic point 17 are marked on product to be measured, and the grid calibration of 1*1mm is placed in the visual field of camera 6
Plate；
B, start driving motor 4, camera model is enabled to move along a straight line；
C, camera model successively moves to the corresponding A characteristic point 16 pre-set and B characteristic point 17 is taken pictures on station, and high speed is defeated
Unit 12 triggers camera 6 and to taking pictures out, while triggering the position that high speed input unit 13 latches current raster ruler 8, and
The image 1 of A characteristic point 16 and the image 2 of B characteristic point 17 are obtained in succession；
D, the deviation (S1) of A feature in image 1 is recorded, the deviation (S3) of B feature in grating scale spacing (S2) and image 2, meter
Calculate characteristic point distance: the distance of characteristic point=(S1)+(S2)+(S3).
Further, step B- step D is repeated, distance, the deviation (S1) of A feature, grating scale of multiple groups characteristic point are obtained
The value and record of the deviation (S3) of spacing (S2) and B feature are taken pictures the repeatability of fixing line distance for verifying AB two o'clock.
Further, number of repetition is 100 times.
Further, grating scale spacing (S2) is that image 2 latches the position of grating scale and image 1 latches light in step D
The difference of the position of grid ruler.
The invention has the benefit that directly reacting the real data of tache motorice present invention introduces grating scale module, taking pictures
Moment latches 8 current location of grating scale, it is ensured that image and physical location really correspond to, and eliminate what control terminal and tache motorice introduced
Any error, greatly improves measurement accuracy；The present invention use 8 actual measurement of grating scale, can choose small pixel camera and
Common multiplying power camera lens does not all influence precision completely, greatly reduces development cost.The present invention solves high Cost Design hardly possible
Problem greatly improves the competitiveness of product.
In this embodiment, encoder acquisition unit 11 acquires mould using times good fortune encoder of model EL5101
Block, speedy carding process unit 12 and high speed input unit 13 are respectively the 2 channel number word amounts of model EL2252 and model EL1252
Input terminal module.Speedy carding process unit 12 and high speed input unit 13 have the characteristics that following two: independent dual channel high speed is defeated
Enter and exports；The input and output corresponding time < 1us.In addition, high speed latch is worked as while the realization of present invention PLC module 10 is taken pictures
Front position, it is only necessary to which pre-set picture-taking position, driving motor 4 are realized fly in the process from starting point high-speed motion to terminal
It claps, shortens photo opporunity to greatest extent.Solve in the prior art that measurement demand motor must take pictures again after coming to a complete stop every time, from subtracting
Speed measures the range data pole of multiple characteristic points to stopping, taking pictures, further accelerate and at least need to consume time of 0.5S if necessary
Efficiency is affected greatly.
It is carrying out passing through experiment number as shown in Figures 4 to 7 for verifying the take pictures repeatability of fixing line distance of AB two o'clock
Fly to clap measuring distance repeatability all within 3um according to can be seen that 100 repeatability, this technology detection scheme reaches high-precision
Measurement is horizontal.
The present invention can be used for the technical field of long range measuring technology application.
Claims (8)
1. a kind of fly to clap the high precision measuring device latched based on grating scale high speed, it is characterised in that: it includes camera model, light
Grid ruler module and two groups of symmetrically arranged straight-line motion mechanisms, the straight-line motion mechanism include bracket (1) and are arranged at institute
The ball screw (2), shaft coupling (3) and driving motor (4) on bracket (1) top are stated, is adapted to setting on the ball screw (2)
Have nut slider (5), the camera model includes camera (6) and camera mounting base (7), the two sides of the camera mounting base (7)
It is fixedly connected respectively with the nut slider (5) in straight-line motion mechanism described in two groups, the grating scale module includes grating scale (8)
With reading head (9), the reading head (9) is connected with the nut slider (5), and the grating scale (8) is arranged in the bracket
(1) on and it is parallel to the axial directions of the ball screw (2).
2. according to claim 1 fly to clap the high precision measuring device latched based on grating scale high speed, it is characterised in that: it
It further include PLC module (10), the PLC module (10) includes encoder acquisition unit (11), speedy carding process unit (12) and height
Fast input unit (13), the encoder acquisition unit (11) for acquiring grating scale data, the speedy carding process unit in real time
(12) match to merge with camera (6) and take pictures for triggering camera (6), the high speed input unit (13) and the reading head (9)
Signal is with merging for latching current raster ruler location information.
3. according to claim 2 fly to clap the high precision measuring device latched based on grating scale high speed, it is characterised in that: institute
State camera (6) and be provided with station of taking pictures on motion path, the speedy carding process unit (12) be mounted on the bracket (1) and
It corresponds at the station of taking pictures, the reception with speedy carding process unit (12) signal cooperation is provided on the camera (6)
Device, the encoder acquisition unit (11) and the high speed input unit (13) are installed on camera mounting base (7).
4. according to claim 1 fly to clap the high precision measuring device latched based on grating scale high speed, it is characterised in that: institute
The upper inner for stating bracket (1) is provided with linear guide (14), and the linear guide (14) is equal with the ball screw (2)
Row, the bottom of the camera mounting base (7) is provided with the sliding block (15) being slidingly fitted with the linear guide (14).
5. according to claim 4 fly to clap the high precision measuring device latched based on grating scale high speed, it is characterised in that: institute
State linear guide (14) and be provided with inner groovy on the two sides of width direction, the bottom of the sliding block (15) be provided with it is described straight
The compatible card slot in top of line guide rail (14).
6. a kind of application method for flying to clap the high precision measuring device latched as claimed in claim 3 based on grating scale high speed,
It is characterized by comprising the following steps:
A characteristic point (16) and B characteristic point (17) are marked on product to be measured, and the grid of 1*1mm is placed in the visual field of camera (6)
Scaling board；
Start driving motor (4), camera model is enabled to move along a straight line；
Camera model successively moves to the corresponding A characteristic point (16) pre-set and B characteristic point (17) is taken pictures on station, high speed
Output unit (12) triggering camera (6) and to taking pictures, while triggering high speed input unit (13) and latching current raster ruler (8)
Position, and obtain the image 1 of A characteristic point (16) and the image 2 of B characteristic point (17) in succession；
The deviation (S1) of A feature in image 1 is recorded, the deviation (S3) of B feature in grating scale spacing (S2) and image 2 calculates
Characteristic point distance: the distance of characteristic point=(S1)+(S2)+(S3).
7. according to the method described in claim 6, it is characterized by: repeat step B- step D, obtain multiple groups characteristic point away from
Value and record from, the deviation (S3) of the deviation (S1) of A feature, grating scale spacing (S2) and B feature, for verifying AB two
Put the repeatability for fixing line distance of taking pictures.
8. according to the method described in claim 7, it is characterized by: number of repetition is 100 times.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810873540.9A CN108931196A (en) | 2018-08-02 | 2018-08-02 | Fly to clap the high precision measuring device latched and its application method based on grating scale high speed |
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| CN201810873540.9A CN108931196A (en) | 2018-08-02 | 2018-08-02 | Fly to clap the high precision measuring device latched and its application method based on grating scale high speed |
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| CN108931196A true CN108931196A (en) | 2018-12-04 |
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Cited By (3)
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| CN111355893A (en) * | 2020-03-31 | 2020-06-30 | 广东利元亨智能装备股份有限公司 | Flying shooting control method and system |
| CN111467693A (en) * | 2020-05-13 | 2020-07-31 | 新里程医用加速器(无锡)有限公司 | Multi-blade grating |
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