CN207688875U - A kind of dipmeter based on machine vision - Google Patents
A kind of dipmeter based on machine vision Download PDFInfo
- Publication number
- CN207688875U CN207688875U CN201721575711.7U CN201721575711U CN207688875U CN 207688875 U CN207688875 U CN 207688875U CN 201721575711 U CN201721575711 U CN 201721575711U CN 207688875 U CN207688875 U CN 207688875U
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- China
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- box body
- ccd camera
- microcontroller
- serial ports
- machine vision
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Abstract
The utility model discloses a kind of dipmeters based on machine vision, including CCD camera, camera lens, vertical line, ball-type pendulum, fixing bracket, box body, microcontroller and serial ports screen, CCD camera configured with camera lens is fixed at the center of tray interior top surface, fixing bracket one end is fixed on tray interior side, the other end is located along the same line with CCD camera, box body center, and the vertical line of end setting herein, vertical line end connects ball-type pendulum, microcontroller and serial ports screen are each attached on box body side surface, and microcontroller is electrically connected with CCD camera, serial ports screen respectively.Box body is placed on tested inclined-plane, camera identifies the physical location of ball-type pendulum according to the calibration grid on tray interior bottom surface, and in conjunction with parameters such as length of perpendicular, operation obtains inclination angle in microcontroller, and is shown on serial ports screen.Dipmeter disclosed by the utility model based on machine vision can be into Mobile state, the accurate measurement of static angular, and strong antijamming capability, and precision is high.
Description
Technical field：
The utility model is related to engineering measurement fields, more particularly to a kind of dipmeter based on machine vision.
Background technology：
In engineering practice, high-technology field especially harsh to required precision, precision measurement apparatus is essential.
Wherein, the measurement of the fine angles such as corner, inclination angle has important meaning to bridge construction, aerospace and military equipment exploitation etc.
Justice.The systems such as radar, robot, high-precision machine tool are required for angle measurement unit or related sensor.Accurate angle measurement
It has not only ensured the normal operation of instrument and equipment, has more improved accuracy and the stability of its operation.
In angle measurement method, it converts angle change to the parameters such as voltage, electric current, the electricity then measured again is surveyed
Amount method is easy by electromagnetic interference, affected by environment big；Although and the mechanical measuring means stability that directly measurement angle changes
It is higher, but precision is relatively low, it cannot be guaranteed that accuracy of measurement.
Invention content：
For existing angle measurement unit there are the problem of, the utility model provides a kind of inclination angle based on machine vision
Measuring instrument measures the inclination angle of plumb line benchmark using machine vision technique, has strong antijamming capability, measurement accuracy
Height, it is highly practical the advantages that.
Realize that the technical solution of the utility model aim is a kind of dipmeter based on machine vision, the dress
It sets including CCD camera, camera lens, vertical line, ball-type pendulum, fixing bracket, box body, microcontroller and serial ports screen；CCD camera is fixed on box
At the center of body inside top surface, and CCD camera is configured with camera lens, and fixing bracket one end is fixed on tray interior side, another
End is located along the same line with CCD camera, box body center, and the vertical line of end setting herein, and vertical line end connects ball-type pendulum, monolithic
Machine and serial ports screen are each attached on box body side surface, and microcontroller is electrically connected with CCD camera, serial ports screen and monolithic mechatronics.
The measuring instrument of the utility model design, has following remarkable advantage：(1) use perpendicular as inclination angle benchmark,
Accuracy is higher, can adapt to different by geodesic structure.(2) position of pendulum is positioned using machine vision technique, and
The method for handling to obtain final inclination angle using microcontroller, not only has an anti-interference ability of Mechanical measurement, and no less than
The accuracy of indirect electrical measurement, can be achieved to accurately measure to dynamic angle and static angular.(3) net of tray interior bottom surface
Lattice are used for the calibration of camera, and in conjunction with the serial ports screen of microcontroller and display for processing, whole device globality is high, practicability
By force, different types of angle change can be measured, adapts to varying environment.
Description of the drawings：
Fig. 1 is the structural schematic diagram of dipmeter of the utility model based on machine vision；
Fig. 2 is camera acquisition image simplified schematic diagram；
Fig. 3 is the relationship simplified schematic diagram at inclination angle and other parameters.
Specific implementation mode：
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
The utility model uses machine vision technique, and the inclination angle on the basis of perpendicular is measured and shown, and will be whole
A system is encapsulated as a kind of dipmeter based on machine vision.
As shown in Figure 1, a kind of dipmeter based on machine vision includes CCD camera 1, camera lens 2, vertical line 3, ball-type pendulum
Hammer 4, fixing bracket 5, box body 6, microcontroller 7 and serial ports screen 8.Box body 6 is the cube structure of six blocks of plank composition, inner space
Relevant apparatus is measured for placing, the relevant apparatus of processing and display is placed in outside.The centre bit of upper surface inside box body 6
It sets and is fixed with CCD camera 1, also, be configured with camera lens 2, the visual angle of CCD camera 1 is the vertical direction of box body 6, and visual field model
Enclose the 6 entire bottom surface in inside of covering box body.It is internally provided with fixing bracket 5 in box body 6, fixing bracket 5 is alphabetical " L " shape structure,
The bottom of " L " is fixed on the side inside box body 6, the endpoint of the other end on the visual angle line of CCD camera 1, that is, endpoint,
One vertical line 3 of connection in the same horizontal line, and is held in the center of CCD camera 1 and box body 6 herein, and 3 other end of vertical line connects ball-type
Pendulum 4, ball-type pendulum 4 remain plummet state, when to ensure that CCD camera 1 acquires image data, not by fixing bracket 5
It influences, selects transparent plastic as its material.The image that CCD camera 1 acquires needs to be converted into available actual coordinate data, institute
With the grid of similar chessboard is drawn in the bottom surface inside box body 6, and mesh is square, the calibration for CCD camera 1 and coordinate
Conversion.
It controls and measures part, be fixed with microcontroller 7 and serial ports screen 8 in the exterior lateral sides of box body 6, and microcontroller 7 divides
It not being electrically connected between CCD camera 1 and serial ports screen 8, microcontroller 7 can control CCD camera 1 to be acquired and related setting,
The image data that CCD camera 1 acquires can be transferred to microcontroller 7, and serial ports screen 8 can show the final operation result of microcontroller 7.
The measurement method of dipmeter based on machine vision, is as follows：
1st step：The outer bottom face of dipmeter box body 6 is fitted on tested inclined-plane, microcontroller 7 is started, controls CCD
Camera 1 starts operation.
2nd step：CCD camera 1 determines coordinate origin O according to 6 inner bottom surface grid of box body, acquires spherical pendulum in box body 6
Then a series of projected images of inner bottom surface are split processing to every frame image, ball-type pendulum 4 is gone out as Target Segmentation
Come, and carry out centroid detection processing, using the center-of-mass coordinate of the i-th frame as the position coordinates (x of ball-type pendulum 4 at this timei,yi), such as scheme
Shown in 2.
3rd step：CCD camera 1 again according to 6 inner bottom surface of box body grid image, and combining camera resolution ratio carry out
Calibration, determines the transformational relation of image coordinate system and world coordinate system：
Wherein, j × k is the resolution ratio of camera, and M × N is the actual size of grid under camera fields of view, (Xi,Yi) it is that the world is sat
To (x under image coordinate system under mark systemi,yi) coordinate transforming.
4th step：According to 3 length of vertical line, the projected position of spherical pendulum and position relationship shown in Fig. 3, can be obtained by
The practical inclination angle in deviational survey face：
Wherein, l is the length of vertical line 3；l1Projected length for vertical line 3 in bottom surface, i.e., in image particle to origin away from
From；θiThe inclination angle obtained for the i-th frame measurement.
5th step：When measuring dynamic angle, using microcontroller 7 by inclination angle thetaiThe Drawing of Curve changed over time comes out, and shows
Show on serial ports screen 8；When measuring static angular, to improve accuracy rate, using microcontroller 7 to the inclination angle theta within the scope of certain timei
Take mean value as final inclination angle.
Claims (3)
1. a kind of dipmeter based on machine vision, which is characterized in that including CCD camera (1), camera lens (2), vertical line (3),
Ball-type pendulum (4), fixing bracket (5), box body (6), microcontroller (7) and serial ports screen (8), CCD camera (1) are fixed on box body (6)
At the center of inside top surface, and CCD camera (1) is configured with camera lens (2), and fixing bracket (5) one end is fixed on box body (6) private side
On face, the other end is located along the same line with CCD camera (1), box body (6) center, and end setting vertical line (3) herein, vertical line (3)
End connects ball-type pendulum (4), and microcontroller (7) and serial ports screen (8) be each attached on box body (6) side surface, microcontroller (7) and
CCD camera (1) is electrically connected, and serial ports screen (8) is electrically connected with microcontroller (7).
2. a kind of dipmeter based on machine vision according to claim 1, which is characterized in that the fixing bracket
(5) it is the L-shaped structure of transparent plastics material.
3. a kind of dipmeter based on machine vision according to claim 1, which is characterized in that the box body (6)
For the closing cube structure of six blocks of plank composition, drawing in inner bottom surface has grid, mesh to be square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721575711.7U CN207688875U (en) | 2017-11-16 | 2017-11-16 | A kind of dipmeter based on machine vision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721575711.7U CN207688875U (en) | 2017-11-16 | 2017-11-16 | A kind of dipmeter based on machine vision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207688875U true CN207688875U (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721575711.7U Expired - Fee Related CN207688875U (en) | 2017-11-16 | 2017-11-16 | A kind of dipmeter based on machine vision |
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| Country | Link |
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| CN (1) | CN207688875U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059856A (en) * | 2018-06-30 | 2018-12-21 | 浙江工业大学 | A kind of inclination measuring system and its measurement method based on camera |
-
2017
- 2017-11-16 CN CN201721575711.7U patent/CN207688875U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059856A (en) * | 2018-06-30 | 2018-12-21 | 浙江工业大学 | A kind of inclination measuring system and its measurement method based on camera |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180803 Termination date: 20191116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |