CN108341230B - A kind of wood-based plate surface defect on-line measuring device based on synchronization principles - Google Patents
A kind of wood-based plate surface defect on-line measuring device based on synchronization principles Download PDFInfo
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- CN108341230B CN108341230B CN201810031308.0A CN201810031308A CN108341230B CN 108341230 B CN108341230 B CN 108341230B CN 201810031308 A CN201810031308 A CN 201810031308A CN 108341230 B CN108341230 B CN 108341230B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/898—Irregularities in textured or patterned surfaces, e.g. textiles, wood
- G01N21/8986—Wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/02—Control or detection
- B65G2203/0208—Control or detection relating to the transported articles
- B65G2203/025—Speed of the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/02—Control or detection
- B65G2203/0266—Control or detection relating to the load carrier(s)
- B65G2203/0291—Speed of the load carrier
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a kind of wood-based plate surface defect on-line measuring device based on synchronization principles, belongs to log detection equipment technical field.On-Line Monitor Device proposed by the present invention, encoder obtains wood-based plate instantaneous velocity to be measured and gives controller on wood-based plate conveyer belt to be measured, and judge whether wood-based plate to be measured enters shooting area by trigger switch, controller sends motor according to detection signal and instructs, drive the driven member including camera mobile with speed identical with wood-based plate to be measured, camera completes the shooting to wood-based plate to be measured therebetween, image is subsequently sent to computer, and defect estimation is carried out according to image of the Processing Algorithm to acquisition, camera can automatically reset under acting under spring restoring force simultaneously, it is ready for shooting next time.The present invention is inherently eliminated image motion and obscures, and solves the problems, such as that traditional fuzzy image recovery Processing Algorithm is complicated, time-consuming, realizes the machine vision on-line checking of wood-based plate surface defect to be measured.
Description
Technical field
The present invention relates to a kind of wood-based plate surface defect on-line measuring device based on synchronization principles, belongs to log detection and sets
Standby technical field.
Technical background
Surface quality is one of the important joint of detection before wood-based plate factory, and for rejecting, there are gum spot, scratch, chippings etc.
Defect plate, to guarantee wood-based plate production economy benefit.Wood-based plate surface defects detection is identified mainly by artificial eye at present, but
Human eye recognition efficiency in prolonged work can be gradually reduced, and accuracy also can be reduced seriously, be easy to appear holiday.The problem
It is especially prominent during continuous press produces wood-based plate, influence economic benefit.It is some with the development of computer technology
Scholar extracts and handles to surface image using machine vision and image processing techniques, to realize automatic detection and product
Classification.Such as Chinese patent 201611160059.2 discloses a kind of surface defect detection apparatus of wood plank, utilizes CCD industry
Camera shoots wood plank on conveyer belt, is subsequently sent to computer and is handled.But wood-based plate moves in production line
Fast speed, and camera shooting needs certain time for exposure, leads to the motion blur for generating image, and it is reliable to influence image procossing
Property, which is a great problem that machine vision technique is applied in wood-based plate on-line checking field.Fuzzy, the mesh for image motion
Before have some solutions, if Chinese patent 201110099458.3 discloses a kind of method that elimination image motion is fuzzy,
The direction of motion and speed are estimated by way of calculating objective area in image luminance component frequency spectrum, and weight is obtained by deconvolution
Composition picture；Chinese patent 201210125697.6 discloses a kind of arbitrary motion blur image restoration of high-speed CCD image sequence
Method obtains the image sequence in the time for exposure using high-speed CCD sensor to construct point spread function (PSF), to pass through
Inverse operation finds out restored image, but similar method is based substantially on the estimation to image point spread function, computationally intensive, seriously subtracts
The efficiency of image processing algorithm, the wood-based plate on-line checking of not competent high rate travel are delayed.
Summary of the invention
The purpose of the present invention is to propose to a kind of wood-based plate surface defect on-line measuring device based on synchronization principles, passes through machine
The mode of tool transmission drives camera and wood-based plate to move in the same direction, at the same speed, to eliminate motion blur, reaches and obtains clear image
Purpose, to effectively be identified to board surface defect feature.
Wood-based plate surface defect on-line measuring device proposed by the present invention based on synchronization principles, including conveyer belt, coding
Device, computer, motor, rack, support frame, makees platform, cam, idler wheel, spring, sliding block and camera at controller；The conveyer belt
It is mounted on the lower part of rack, wood-based plate to be measured is placed on conveyer belt, and conveyer belt is equipped with trigger switch, and trigger switch passes through signal
Line is connected with the controller；The encoder is mounted on the inside of conveyer belt, to measure belt instantaneous velocity and incite somebody to action
The belt instantaneous velocity is sent to controller；
The motor is connected by signal wire with controller, and motor is mounted on the lower part of rack by support frame, described
Motor installation on the support frame；
The camera is connected by signal wire with computer, and camera is installed on the workbench, and workbench is mounted on sliding block
On, sliding block is erected on guide rail, and guide rail is fixed on the top of rack, and guide rail is consistent with the wood-based plate direction of motion to be measured, plays
Guiding role；
The idler wheel is mounted on the lower part of workbench, the shaft level of idler wheel and cam, and idler wheel is contacted with cam for line；
The spring is placed between workbench and rack, for borrowing in workbench in the backhaul stage of the movement along guide rail
Helping the restoring force of spring resets camera.
Wood-based plate surface defect on-line measuring device proposed by the present invention based on synchronization principles, features and advantages are:
1, on-line measuring device proposed by the present invention drives camera using mechanical drive mode, reaches camera and people to be measured
The purpose that plate is in the same direction, moves at the same speed is made, it is fuzzy to be inherently eliminated image motion, it solves traditional fuzzy image and restores processing calculation
The problem of method is complicated, time-consuming, to realize the machine vision on-line checking of wood-based plate surface defect to be measured.Using cam machine
Structure, as long as reasonably designing cam profile, so that it may realize conversion of the cam uniform rotation to driven member linear uniform motion, reach
It is synchronous with preventing for artificial board to be measured to camera " effect；Meanwhile by the restoring force of spring, camera can be made certainly in the cam backhaul stage
It is dynamic to reset, prepare the shooting to next plate, achievees the effect that camera moves back and forth under the conditions of not changing motor steering.
2, on-line measuring device proposed by the present invention carries out speed to wood-based plate on conveyer belt using encoder and examines in real time
Survey, thus motor speed can be adjusted in time, when conveyor belt speed changes, be still able to maintain camera with it is to be measured artificial
Plate moves synchronously.
3, on-line measuring device proposed by the present invention installs trigger switch in the suitable position of conveyer belt, to judge to
Survey whether wood-based plate enters shooting area, controller starts motor according to the trigger signal of trigger switch, it can be achieved that electric motor starting
And what is stalled is precisely controlled, therefore final effect is, only when wood-based plate to be measured enters shooting area, motor just be will start, and be driven
Dynamic camera moves synchronously with wood-based plate to be measured and completes to shoot, while camera motion speed becomes with wood-based plate velocity variations to be measured
Change, therefore improves the detection accuracy of surface defect.
Detailed description of the invention
Fig. 1 is the structural representation of the wood-based plate surface defect on-line measuring device proposed by the present invention based on synchronization principles
Figure.
Fig. 2 is mechanical transmission mechanism schematic diagram of the present invention；
Fig. 3 is cam mechanism working principle diagram in the present invention.
In Fig. 1-Fig. 3,1 is conveyer belt, and 2 wood-based plates to be measured, 3 be trigger switch, and 4 be encoder, and 5 be controller, and 6 be meter
Calculation machine, 7 be guide rail, and 8 be sliding block, and 9 be camera, and 10 be workbench, and 11 be idler wheel, and 12 be spring, and 13 be rack, and 14 be cam,
15 be motor, 16 support frames.
Specific embodiment
Wood-based plate surface defect on-line measuring device proposed by the present invention based on synchronization principles, structure as shown in Figure 1,
Including conveyer belt 1, encoder 4, controller 5, computer 6, motor 15, rack 13, support frame 16, workbench 10, cam 14, rolling
Wheel 11, spring 12, sliding block 8 and camera 9；
The conveyer belt 1 is mounted on the lower part of rack 13, and wood-based plate 2 to be measured is placed on conveyer belt 1, sets on conveyer belt 1
There is trigger switch 3, trigger switch 3 is connected by signal wire with the controller 5；The encoder 4 is mounted on conveyer belt 1
Inside, to measure belt instantaneous velocity and the belt instantaneous velocity be sent to controller 5；
The motor 15 is connected by signal wire with controller 5, and motor 15 is mounted on rack 13 by support frame 16
Lower part, as shown in Figure 2, the cam 14 and motor 15 are mounted on support frame 16,
The camera 9 is connected by signal wire with computer 6, and camera 9 is mounted on workbench 10, and workbench 10 is installed
On sliding block 8, sliding block 8 is erected on guide rail 7, and guide rail 7 is fixed on the top of rack 13, and guide rail 7 and wood-based plate 2 to be measured move
Direction is consistent, plays guiding role；
The idler wheel 11 is mounted on the lower part of workbench 10, idler wheel 11 and cam 14 and shaft it is horizontal, idler wheel 11 with
Cam 14 is line contact, and idler wheel 11 and cam 14 are without Relative sliding during rotation, to reduce and 14 contact process of cam
Frictional force.
The spring 12 is placed between workbench 10 and rack 13, in workbench 10 in the movement along guide rail 7
The backhaul stage resets camera 9 by the restoring force of spring 12.
With reference to the accompanying drawing, on-line measuring device content of the invention is discussed in detail:
Motor 15 in on-line measuring device of the present invention controls it by controller 5, and remain a constant speed after starting rotation every time
And it rotates a circle, and the time used is less than individual wood-based plate 2 to be measured completely by certain fixed point required time, to guarantee in time
It resets.Motor 15 can be diversified forms motor, such as alternating current generator, direct current generator, stepper motor or servo motor, according to motor
Form is different, and used control mode also answers different, various additional components needed for control modes all kinds of for realization
This patent does not enumerate, but belongs within the scope of this patent.
Camera 9 and workbench 10 are connected, and workbench 10 is connect with sliding block 8, idler wheel 11 respectively again, and cam is collectively formed in they
The driven member of mechanism；The idler wheel 11 is fixed on one end of workbench 10, can be freely rotated on workbench 10, to reduce work
Make the frictional force in platform 10 and 14 contact process of cam；The guide rail 7 and rack 13 and conveyer belt 1 are relatively fixed, and guide rail 7 with
2 direction of motion of wood-based plate to be measured is consistent, plays guiding role；The shaft of the cam 14 and idler wheel 11 is horizontal, and the two connects in line
It touches and the two is during rotation without Relative sliding；The motor 15 is connect with cam 14, can be moved in a circle with moving cam 14,
Motor 15 and rack 13 are connected by support frame 16 simultaneously；The workbench 10 is connect with rack 13 by spring 12, in order to
Camera 9 is resetted by 12 restoring force of spring in the backhaul stage.
Fig. 3 shows cam mechanism working principle in device: entire mechanism totally one driving link, can when motor 15 rotates
Camera 9 is driven to move to far from 15 direction of motor by the lift section of cam 14, spring 12 is stretched at this time；When entrance backhaul rank
Section, since by 12 pulling force of spring, camera 9 just automatically returns to initial position, by this manner, motor 15 often rotates a circle, phase
Machine 9 undergoes the reciprocal process with wood-based plate 2 to be measured movement and reset in the same direction, as shown in the thick-line arrow in Fig. 3.
Guide rail 7 has length two identical, is located at the two sides of camera 9, to ensure that camera 9 does not rotate, simultaneously
Shooting of the camera 9 to wood-based plate 2 to be measured is not interfered.Sliding block 8 also there are two, be separately fixed at the left and right sides of camera 9, can be upper
It states and is slid on guide rail 7, form prismatic pair with guide rail 7.Cam 14 and rack 13, idler wheel 11 and workbench 10 are respectively formed rotation
Pair, motor 15 are driving device.Cam 14 and idler wheel 15 form higher pair, and wherein cam 14 is driving link, and contour line includes to rise
Journey, it is remote stop, backhaul and closely stop four-stage, wherein the lift stage is to push the movement in the same direction of driven member and wood-based plate to be measured 2,
The backhaul stage can reset by spring 12, and far stop and closely stop driven member speed in the stage and remain zero.14 contour line of cam
Concrete form according to 9 time for exposure of camera, driven member accelerate and ways of deceleration depending on, wherein camera in certain section in lift stage
9 holdings move at the same speed with wood-based plate 2 to be measured and the time is greater than the time for exposure, to ensure to shoot image clearly.
14 shaft of cam is vertical with 2 surface of wood-based plate to be measured in the present embodiment, but can also be horizontally mounted therewith, specific
Form need to be depending on actual size of the space and mechanism stress condition；
Encoder 4 is mounted on inside conveyer belt 1, to measure belt instantaneous velocity.Trigger switch 3 is mounted on conveyer belt 1
Certain position of upper surface, to detect whether wood-based plate 2 to be measured enters shooting area.Trigger switch 3 can be a variety of in embodiment
The sensor of form, such as photosensitive sensor, infrared sensor, effect be exported according to the position of wood-based plate 2 to be measured "None" or
The signal of " having ".
It is as follows to the process of individual wood-based plate surface defects detection to be measured in the present embodiment:
Firstly, the encoder 4 being mounted on conveyer belt 1 obtains belt speed, which can be considered the shifting of wood-based plate 2 to be measured
Dynamic speed, and give controller 5；When wood-based plate to be measured shifting 2, which is moved, shoots area to camera, trigger switch 4 is sent to controller 5 believes
Number, at this time controller 5 according to 2 speed of wood-based plate to be measured to motor 15 send instruct, drive camera 9 with 2 phase of wood-based plate to be measured
Same speed is mobile, while camera 9 completes the shooting to wood-based plate 2 to be measured；Subsequent picture is sent to computer 6, and according to place
Adjustment method carries out defect estimation to the image of acquisition；Last camera 9 is resetted in the case where spring draws the effect of 12 power, is ready for next time
Shooting.
In conclusion on-Line Monitor Device proposed by the present invention, encoder obtains people to be measured on wood-based plate conveyer belt to be measured
It makes plate instantaneous velocity and gives controller, and judge whether wood-based plate to be measured enters shooting area, controller root by trigger switch
Motor is sent according to detection signal and is instructed, the driven member including camera is driven to move with speed identical with wood-based plate to be measured
Dynamic, camera completes the shooting to wood-based plate to be measured therebetween, and image is subsequently sent to computer, and according to Processing Algorithm to acquisition
Image carries out defect estimation, while camera can automatically reset under effect under spring restoring force, be ready for shooting next time.
In one embodiment of the present of invention, the model Omron E6B2-CWZ6C of encoder used, control used
Model SIEMENS PLC-the S1200 of device, motor used are Panasonic MSME022G1S.
The embodiment only describes the technology of the present invention principle, can not limit the scope of protection of the present invention, therefore, all at this
Any change, the replacement done within the spirit and principle of invention, should be included within the scope of the present invention.
Claims (1)
1. a kind of wood-based plate surface defect on-line measuring device based on synchronization principles, it is characterised in that the on-line measuring device packet
Include conveyer belt, encoder, controller, computer, motor, rack, support frame, workbench, cam, idler wheel, spring, sliding block and phase
Machine；The conveyer belt is mounted on the lower part of rack, and wood-based plate to be measured is placed on conveyer belt, and conveyer belt is equipped with trigger switch,
Trigger switch is connected by signal wire with the controller；The encoder is mounted on the inside of conveyer belt, to measure
The belt instantaneous velocity is simultaneously sent to controller by belt instantaneous velocity；
The motor is connected by signal wire with controller, and motor is mounted on the lower part of rack, the electricity by support frame
Machine is installed on the support frame；
The camera is connected by signal wire with computer, and camera is installed on the workbench, and workbench is mounted on sliding block, sliding
Block frame is located on guide rail, and guide rail is fixed on the top of rack, and guide rail is consistent with the wood-based plate direction of motion to be measured, is played guiding and is made
With；
The idler wheel is mounted on the lower part of workbench, and idler wheel is parallel with the shaft of cam, and idler wheel is contacted with cam for line；
The spring is placed between workbench and rack, for backhaul stage of the workbench when moving along the rail by spring
Restoring force reset camera.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810031308.0A CN108341230B (en) | 2018-01-12 | 2018-01-12 | A kind of wood-based plate surface defect on-line measuring device based on synchronization principles |
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| CN201810031308.0A CN108341230B (en) | 2018-01-12 | 2018-01-12 | A kind of wood-based plate surface defect on-line measuring device based on synchronization principles |
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| CN108341230B true CN108341230B (en) | 2019-08-30 |
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| CN113670362B (en) * | 2021-10-25 | 2022-02-15 | 广东科视光学技术股份有限公司 | Full-automatic optical precision measurement equipment |
| CN114295629B (en) * | 2022-01-04 | 2024-06-14 | 浙江科镭仕科技有限公司 | Machine vision image characteristic scanning device and scanning method thereof |
| CN117750204A (en) * | 2023-11-14 | 2024-03-22 | 东南大学 | Visual synchronous tracking shooting method and device for moving target on conveying line |
| CN117647583A (en) * | 2024-01-29 | 2024-03-05 | 中国林业科学研究院木材工业研究所 | Method and device for on-line quality inspection of artificial board and decorative artificial board |
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| CN203534979U (en) * | 2013-10-11 | 2014-04-09 | 长春理工大学 | Portable metal surface defect laser scanning detection device |
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