CN103453840A - Automatic detection method for lock core precision of cylinder lock - Google Patents
Automatic detection method for lock core precision of cylinder lock Download PDFInfo
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- CN103453840A CN103453840A CN2013104350457A CN201310435045A CN103453840A CN 103453840 A CN103453840 A CN 103453840A CN 2013104350457 A CN2013104350457 A CN 2013104350457A CN 201310435045 A CN201310435045 A CN 201310435045A CN 103453840 A CN103453840 A CN 103453840A
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Abstract
The invention provides an automatic detection method for lock core precision of a cylinder lock. The method comprises the steps of enabling a lock core of the cylinder lock to be fixed on a tool strip clamp, enabling the face of the lock core of the cylinder lock with spring holes to be vertically upward, enabling the tool strip clamp to run on line, enabling a shooting camera to be fixed over the tool strip clamp running on line, externally triggering and controlling signals to start the camera to shoot in real time images of the face of the lock core of the cylinder lock provided with the spring holes and running on line, enabling a computer to extract and measure diameters of all the spring holes and intervals of the spring holes by image algorithm processing; at error precision of 0.5mm, judging whether all products simultaneously meet the conditions that the diameters of the spring holes obtained by measurement are equal and the intervals between the spring holes are equal, enabling the products to serve as qualified products if the diameters of the spring holes obtained by measurement are equal and the intervals between the spring holes are equal, and enabling the products to serve as waste products if at least one of the two conditions is not met. The automatic detection method is finished by means of a machine vision technology and is high in precision and detection speed and suitable for industrial automation mass production.
Description
Technical field
The present invention relates to mechanical vision inspection technology, especially utilize machine vision the lock core precision of spring lock to be carried out to the method automatically detected.
Background technology
Spring lock also claims cylinder lock with balls, pearl lock, snap lock or pin tumbler locks, is a kind of modal lock structure, and it inserts lock core with key and rotarily drives mechanism and realize switch motion.Several holes that radially distributing on the cylinder-type lock wicking surface of spring lock, these holes are corresponding with the hole on lock body, and guarantee necessary concentricity.Pack in these holes cylinder-shaped marble of two rows differing heights, go up pellet and lower pellet.Generally, the upper pellet in lock body opening inserts in lock core hole, or, in the lower pellet insertion lock body opening in lock core, lock core can not be rotated arbitrarily.After inserting correct key, because shaped as key bit is corresponding one by one with marble hole, tooth depth is corresponding with lower spring length, each pellet is pushed to identical height, thereby the surface of contact of pellet and lower pellet is just in time coincided with the surface of contact of lock core and lock body, lock core is just decontroled and can be rotated freely, thereby lead agency is realized switch motion.
Therefore, can the precision of cylinder of spring lock normally realize that to the spring lock product switching function is most important, at the cylinder of spring lock workshop scene of line production, need to detect online the marble hole diameter of cylinder of spring lock, the precision of spacing.At present, online detection dependence to the cylinder of spring lock precision is manually detected, carry out range estimation and the judgement of cylinder of spring lock precision processes the other workman of arrangement of cylinder of spring lock production line, according to testing result, product is divided into to certified products and unacceptable product, unacceptable product is directly as goods rejection.
The shortcoming that manual detection cylinder of spring lock precision exists mainly contains: the Test Field environment is severe, testing staff's non-stop run for a long time; The accuracy requirement that cylinder of spring lock detects is high, and error precision is generally 0.5mm, and human eye is difficult to accurately judgement, and the chance of makeing mistakes is a lot, can't guarantee to detect quality; Artificial macroscopic speed is limited, and detection efficiency is low.
Summary of the invention
For prior art, the online detection dependence of cylinder of spring lock precision is manually carried out, labour intensity is large, easily produce visual fatigue, can't guarantee product percent of pass and detect quality, the problems such as detection speed is low, the invention provides a kind of rely on machine vision technique to complete there is high precision, high detection speed, be applicable to the automatic testing method of the cylinder of spring lock precision of the large production of industrial automation.
Technical scheme of the present invention is as follows:
A kind of automatic testing method of cylinder of spring lock precision comprises the following steps:
1) cylinder of spring lock is fixed on frock bar fixture, and the face with marble hole that makes cylinder of spring lock is vertically upward, makes frock bar fixture on-line operation, by take camera be fixed on on-line operation frock bar fixture directly over; According to the size of cylinder of spring lock to be detected, adjust aperture size, the time shutter of taking camera, in order to obtain photographic images clearly;
2) the marble hole diameter of cylinder of spring lock and marble hole spacing are made as to the detection parameter, and accuracy of detection and the acceptability limit of described detection parameter are set according to customer requirements;
3) computing machine is obtained triggering and the control signal that camera is synchronizeed with production process, start by external trigger and control signal the image that described camera is taken the face with marble hole of on-line operation cylinder of spring lock in real time, and image transmitting to the computing machine of taking is supplied to detect;
4) computing machine is processed by image algorithm, extracts the image of the face with marble hole of cylinder of spring lock;
5) computing machine carries out characteristic portion extraction and measurement to the image of the face with marble hole of described cylinder of spring lock; The one, extract and measure the diameter of all marble holes; The 2nd, extract and measure the spacing of all marble holes;
6) judge with the error precision of 0.5mm whether the diameter of all marble holes that measure equates, as equated to proceed to next step, as unequal as waste product; By external trigger and control signal, waste product is rejected from the discharging opening of appointment; When product being detected and be waste product, computing machine carries out picture cues by man-machine interface, and starts warning device;
7) with the error precision of 0.5mm judgement institute in steps 6 spacings of not rejecting the marble hole that product measures whether equate, as equal as certified products, as unequal as waste product; By external trigger and control signal, waste product is rejected from the discharging opening of appointment; When product being detected and be waste product, computing machine carries out picture cues by man-machine interface, and starts warning device.
Useful technique effect of the present invention is:
The present invention adopts machine vision automatically to detect the cylinder of spring lock precision, replaces manual detection, reduces hand labor intensity.The present invention is 10 times of artificial left and right to the detection speed of cylinder of spring lock precision, has improved production efficiency.Manual detection, due to environment and physiological reason, can't round-the-clockly uninterruptedly be carried out the product detection, adopts the present invention to make it become possibility, and the production time can extend to greatest extent, has improved the utilization factor of equipment.The qualification rate of manual detection is difficult to assurance, and defect rate is high, has caused the significant wastage of the resources of production and cost; Accuracy of detection of the present invention is high, can greatly improve product percent of pass.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of cylinder of spring lock.
Fig. 2 is the captured detected image of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
Basler ACA640-100GM type industrial camera is fixed on to cylinder of spring lock and detects the both sides by belt transmission system, camera is about 20mm apart from the distance of cylinder of spring lock upper surface, use is executed and is born 50 times of amplification zoom zoom camera lenses, focal length is adjusted to 16mm, aperture is transferred to maximal value, and the time shutter is adjusted to 0.41ms.Accuracy of detection is set to the 0.1mm degree, and marble hole diameter and the spacing dimension error of setting the cylinder of spring lock of certified products are the 0.5mm degree.Adopt special-purpose White LED bowl light source, irradiated (positive light) from the same side of camera, and block with semiclosed the impact that the metal framework shields extraneous veiling glare, in order to obtain visual pattern more stablely, embody the obvious characteristic on cylinder of spring lock surface.The LED bowl light source of this project is used the machine vision special light source (also can use the LED bowl light source of other companies) of CCS company, in order to can photograph image clearly more stablely, and is shown in the screen of computing machine.Cylinder of spring lock is fixed on frock bar fixture, and the face with marble hole (upper surface of Fig. 1) that makes cylinder of spring lock vertically upward, adopt the belt transmission system on production line to carry out the conveying of cylinder of spring lock, guarantee that cylinder of spring lock, by certain direction and speed, stably enters pick-up unit.
Computing machine is according to the different control system of institute of different production firm production equipment, obtain triggering and control signal that camera is synchronizeed with production process, start described industrial camera and take the image (as shown in Figure 2) of the face with marble hole of the cylinder of spring lock of on-line operation, and, by the image of the face with marble hole of the cylinder of spring lock that obtains, be stored in computing machine.
Computing machine carries out the image processing to captured image by edge extracting, smoothing denoising, binary conversion treatment, Fourier Tranform scheduling algorithm, makes image more clear, more meets the truth of cylinder of spring lock.The algorithm adopted in above-mentioned image processing process is conventional algorithm of the prior art.
Computing machine calculates and compares the image of described cylinder of spring lock.On the one hand, extract and measure the diameter of all marble holes, as shown in Figure 2 size a1, a2, a3, a4; On the other hand, extract and measure the spacing of all marble holes, as shown in Figure 2 size b1, b2, b3.
Then, at first with the error precision of 0.5mm, judge whether diameter a1, a2, a3, the a4 of all marble holes that measure equate, as equated to proceed to next step, as unequal as waste product; Then, with the error precision of 0.5mm, judge after all judgements of the diameters through above-mentioned marble hole whether spacing b1, the b2, the b3 that do not reject the marble hole that product measures equate, as equated as certified products, as unequal as waste product; By external trigger and control signal, waste product is rejected from the discharging opening of appointment; When product being detected and be waste product, computing machine carries out picture cues by man-machine interface, and starts warning device.That is, only have the diameter error that simultaneously meets all marble holes that measure to be less than 0.5mm, and the interval error of all marble holes that measure just is judged as certified products while being less than this two conditions of 0.5mm.
For example, the value that calculates a1 in Fig. 2, a2, a3, a4 is 3.0mm, and the value of b1, b2 is 4.5mm, and the value of b3 is 4.7mm, but the error of b3 and b1, b2 is within acceptability limit 0.5mm, and this product is certified products; Computing machine is recorded, is classified, is added up warehouse-in to such certified products.As the value that calculates a1 in Fig. 2, a2, a3, a4 is 3.5mm, the value of b1, b3 is 5.0mm, and the value of b2 is 5.6mm, and the error of b2 and b1, b3 is outside acceptability limit 0.5mm, and this product is unacceptable product.Computing machine is pointed out the unacceptable product situation in image by friendly man-machine interface, and gives sound, light alarm, and such unacceptable product is recorded, classifies, adds up warehouse-in.
The control system (hardware and software) of the image capture device used in above all embodiment (camera, radiation source, power supply, image pick-up card etc.) and storage device (hard disk, CD, floppy disk etc.), image processing equipment (hardware of image processor and software), image display (hardware and software), warning device and each part mentioned above all adopts prior art to design and produce or directly adopts relevant commercially available prod.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive without departing from the spirit and concept in the present invention or associate, within all should thinking and being included in protection scope of the present invention.
Claims (1)
1. the automatic testing method of a cylinder of spring lock precision is characterized in that comprising the following steps:
1) cylinder of spring lock is fixed on frock bar fixture, and the face with marble hole that makes cylinder of spring lock is vertically upward, makes frock bar fixture on-line operation, by take camera be fixed on on-line operation frock bar fixture directly over; According to the size of cylinder of spring lock to be detected, adjust aperture size, the time shutter of taking camera, in order to obtain photographic images clearly;
2) the marble hole diameter of cylinder of spring lock and marble hole spacing are made as to the detection parameter, and accuracy of detection and the acceptability limit of described detection parameter are set according to customer requirements;
3) computing machine is obtained triggering and the control signal that camera is synchronizeed with production process, start by external trigger and control signal the image that described camera is taken the face with marble hole of on-line operation cylinder of spring lock in real time, and image transmitting to the computing machine of taking is supplied to detect;
4) computing machine is processed by image algorithm, extracts the image of the face with marble hole of cylinder of spring lock;
5) computing machine carries out characteristic portion extraction and measurement to the image of the face with marble hole of described cylinder of spring lock; The one, extract and measure the diameter of all marble holes; The 2nd, extract and measure the spacing of all marble holes;
6) judge with the error precision of 0.5mm whether the diameter of all marble holes that measure equates, as equated to proceed to next step, as unequal as waste product; By external trigger and control signal, waste product is rejected from the discharging opening of appointment; When product being detected and be waste product, computing machine carries out picture cues by man-machine interface, and starts warning device;
7) with the error precision of 0.5mm judgement institute in steps 6 spacings of not rejecting the marble hole that product measures whether equate, as equal as certified products, as unequal as waste product; By external trigger and control signal, waste product is rejected from the discharging opening of appointment; When product being detected and be waste product, computing machine carries out picture cues by man-machine interface, and starts warning device.
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| CN201310435045.7A CN103453840B (en) | 2013-09-23 | 2013-09-23 | The automatic testing method of lock core precision of cylinder lock |
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| CN201310435045.7A CN103453840B (en) | 2013-09-23 | 2013-09-23 | The automatic testing method of lock core precision of cylinder lock |
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| CN103453840B CN103453840B (en) | 2015-12-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105956942A (en) * | 2016-05-12 | 2016-09-21 | 陕西瑞海电力工程有限公司 | Detection method for quality of electric power pipe gallery reinforcing steel bar mesh based on machine vision and detection device |
| CN106932643A (en) * | 2017-03-30 | 2017-07-07 | 深圳市立德通讯器材有限公司 | A kind of binding effect detection device and detection method for AMOLED products |
| CN112630559A (en) * | 2020-11-26 | 2021-04-09 | 珠海格力智能装备有限公司 | Butt joint tool and detection equipment |
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| JPH02139280U (en) * | 1989-04-26 | 1990-11-21 | ||
| JP2003344296A (en) * | 2002-05-31 | 2003-12-03 | Shibuya Kogyo Co Ltd | Inspection method and device for key |
| US7243437B1 (en) * | 2006-03-13 | 2007-07-17 | Armando Estrada | Decoding device for double-sided keys |
| CN201011490Y (en) * | 2007-01-15 | 2008-01-23 | 曹堃 | Lock core measuring tool |
| EP2336462A1 (en) * | 2009-12-18 | 2011-06-22 | A/S Ruko | Lock pin configuration device and method, computer program product and computer program therefor |
-
2013
- 2013-09-23 CN CN201310435045.7A patent/CN103453840B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02139280U (en) * | 1989-04-26 | 1990-11-21 | ||
| JP2003344296A (en) * | 2002-05-31 | 2003-12-03 | Shibuya Kogyo Co Ltd | Inspection method and device for key |
| US7243437B1 (en) * | 2006-03-13 | 2007-07-17 | Armando Estrada | Decoding device for double-sided keys |
| CN201011490Y (en) * | 2007-01-15 | 2008-01-23 | 曹堃 | Lock core measuring tool |
| EP2336462A1 (en) * | 2009-12-18 | 2011-06-22 | A/S Ruko | Lock pin configuration device and method, computer program product and computer program therefor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105956942A (en) * | 2016-05-12 | 2016-09-21 | 陕西瑞海电力工程有限公司 | Detection method for quality of electric power pipe gallery reinforcing steel bar mesh based on machine vision and detection device |
| CN105956942B (en) * | 2016-05-12 | 2020-06-16 | 陕西瑞海电力工程有限公司 | Machine vision-based quality detection method and device for electric power pipe gallery reinforcing mesh |
| CN106932643A (en) * | 2017-03-30 | 2017-07-07 | 深圳市立德通讯器材有限公司 | A kind of binding effect detection device and detection method for AMOLED products |
| CN112630559A (en) * | 2020-11-26 | 2021-04-09 | 珠海格力智能装备有限公司 | Butt joint tool and detection equipment |
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| CN103453840B (en) | 2015-12-23 |
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