CN101561948A - Automatic coin quality detection device - Google Patents

Abstract

The invention relates to an automatic coin quality detection device, in particular to a high-precision multifunctional automatic coin production quality detection device based on a visual system, realized by applying an image processing technology. The detection device comprises a combined illumination imaging light source, an image receiving unit, an image processing unit, a result output unit and a damaged coin discarding device, wherein the image receiving unit, the image processing unit, the result output unit and the damaged coin discarding device are sequentially connected; the combined illumination imaging light source adopts a mode that surface light sources at a high angle and a low angle illuminate at the same time; the image receiving unit collects image data on the coin surface; the image processing unit process the collected image data, confirms and discards defective products according to a production standard and transfers real-time detected images and analysis result information to the result output unit; and the damaged coin discarding device discards the ultra-detective products according to the control information of the image processing unit. The invention has the objective detection standard, can quantitatively prescribe, improves the production efficiency, can continuously upgrade the detection speed, emancipates the labor force and improves the automation degree of coinage.

Description

A kind of automatic coin quality detection device

Technical field

The present invention relates to a kind of coin production product quality pick-up unit, the high-accuracy multifunctional coin quality of production automatic detection device that particularly a kind of application image treatment technology is realized based on vision system.

Background technology

Coin circulation during China produces at present mainly contains three kinds: be respectively the monobasic coin, and five jiaos of coin and one jiao of coin.In addition, the commemorative coin that also has some.Because Chinese population quantity is many, coin circulation quantity is big, is the only way of enhancing productivity so adopt the coinage process of robotization.Along with the raising of national power, people are also more and more higher to the currency quality requirements of representing national image.Adopt coin finished product (being called for short the flower cake) quality detecting system to replace traditional artificial quality testing can realize the process of robotization coinage, enhance productivity, can also improve the quality of the product that dispatches from the factory.

The detection of flower cake is last link in the coinage flow process, is last one critical point that product quality is checked on.In all multipaths of coinage, because technology, equipment, environment, factor such as artificial can produce various defectives, as: scratch, damage, sticking to mould, dirty cake, oil cake, big incompleteness, little incompleteness, stain, burn into variable color, sticking hole, play knurl etc.Adopt manual detection in the past, had big, the problems such as efficiency ratio is lower, human cost height of examination criteria disunity, labour intensity.

Summary of the invention

The present invention is directed to above-mentioned problems of the prior art, a kind of automatic coin quality detection device is provided, can carry out comprehensive printing quality at existing coin circulation and commemorative coin product and detect, solve examination criteria disunity in the prior art, labour intensity is big, efficient is low, cost is high problem.The present invention adopts many high precision area array CCD cameras to form the precision optics detection system, auxiliary collection and the test analysis of realizing coin image with high accuracy mechanical gearing and stop means; Can detect all surface defective of coin pros and cons and the function of geometric parameter.

Technical scheme of the present invention is:

Surface quality is set checks module, handle the tow sides data of flower cake respectively, and reject the defective coin according to testing result; Comprise combination lighting imaging source, the image receiving unit that connects successively, graphics processing unit, output unit and bad coin are picked out device as a result; The combination lighting imaging source adopts high and low angle area source lighting system simultaneously, can guarantee to obtain the image of coin surface complete display; Image receiving unit is gathered the view data on coin surface; Graphics processing unit is handled the view data of gathering, and determines faulty goods and rejecting according to production standard, real-time detected image and analysis result information can be sent to output unit as a result simultaneously; Bad coin is picked out the control information of device according to graphics processing unit, and overproof product is rejected.

Described image receiving unit comprises shooting support and camera system, and described shooting support is fixed on the operating platform, and combination lighting imaging source and camera system are fixed on the shooting support, gathers the view data on coin surface along coin Surface Vertical direction.

Described graphics processing unit, comprise successively the positioning unit, the filter unit that connect, cut apart sampling unit and lopsided correcting unit, respectively by location, filtering, cut apart and with alignment technique the image of gathering carried out multi-scale filtering and various dimensions are handled, obtain flower cake qualitative data, determine faulty goods and rejecting according to production standard, real-time detected image and analysis result information can be sent to output unit as a result simultaneously.

Described output unit as a result comprises display unit, alarm unit, performance element and database, shows in real time, stores or print.

Described bad coin is picked out device, comprise control circuit, air-blast connection pipe, solenoid valve, special-purpose oriented nozzle, the opening and closing of solenoid valve are controlled by control circuit, and air-blast connection pipe is connected on the inlet of solenoid valve, and the outlet of solenoid valve connects special-purpose oriented nozzle.

Described camera system is area array CCD camera and high-resolution lens.

Be provided with light path between described shooting support and the camera system, strengthen anti-veiling glare interference performance.

Also be provided with material-falling hopper, each side of material-falling hopper inboard is provided with soft material.

Described operating platform also is provided with feed belt and mechanical positioner.

Advantageous effect of the present invention is as follows:

The present invention adopts machine vision technique, and the realtime graphic of production is handled.Check that whether coin exists the various defectives that produce because of technology, equipment, environment, factor such as artificial, can reject the defective coin simultaneously automatically.This device check criteria is objective quantitatively can to improve coin production efficiency greatly, improves the coinage automaticity.

The present invention adopts machine vision technique to carry out quality check, and check criteria is objective, and can quantitative description; Improved production efficiency, detection speed depends on hardware arithmetic speed and program optimization degree, along with the development of technology, can constantly upgrade; The liberation labour improves the coinage automaticity.

Bad coin is picked out unlatching that device can regulate solenoid valve by control circuit constantly and open perdurability, the jet direction that can regulate special-purpose oriented nozzle by bearing structure.Solenoid valve is opened under the effect of control circuit, and air-blast connection pipe transferring high voltage air sprays at a certain angle from special-purpose oriented nozzle, the inferior coin of checking out accurately can be sorted out from good product, has not influenced the normal transmission of product.

Material-falling hopper can be preserved the inferior coin that eliminates.Inferior coin flower cake is blown in the material-falling hopper passage from the side, after the flower cake enters, can guarantee that it falls along opening, does not get back in the product and can not rebound.

The present invention is a non-contact detection system, can not cause any harm for product, and is identical with the principle of work of human eye, and examination criteria is objective reliable, is that desirable end product quality is checked means.

Description of drawings

Fig. 1 is a principle of work block diagram of the present invention.

Fig. 2 is a system works synoptic diagram front view of the present invention.

Fig. 3 is a system works synoptic diagram vertical view of the present invention.

Among the figure, 1, camera, 2, camera lens, 3, light source, 4, device for eliminating, 5, position transducer, 6, the flower cake, 7, scrambler.

Embodiment

Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated.

Surface quality is set checks module, handle the tow sides data of flower cake respectively, and reject the defective coin according to testing result; Comprise combination lighting imaging source, the image receiving unit that connects successively, graphics processing unit, output unit and bad coin are picked out device as a result; The combination lighting imaging source adopts high and low angle area source lighting system simultaneously, can guarantee to obtain the image of coin surface complete display; Image receiving unit is gathered the view data on coin surface along coin Surface Vertical direction, it comprises shooting support, area array CCD camera and high-resolution lens, described shooting support, travelling belt and mechanical positioner are fixed on the operating platform, combination lighting imaging source, area array CCD camera and high-resolution lens are fixed on the shooting support, and the light path of strengthening anti-veiling glare interference performance is set between shooting support and area array CCD camera, the high-resolution lens; Graphics processing unit comprises successively the positioning unit, the filter unit that connect, cuts apart sampling unit and lopsided correcting unit, respectively by location, filtering, cut apart and with alignment technique the image of gathering carried out multi-scale filtering and various dimensions are handled, obtain flower cake qualitative data, determine faulty goods and rejecting according to production standard, simultaneously real-time detected image and analysis result information can be sent to display unit, alarm unit, performance element and database, show in real time, store or print; Bad coin is picked out the control information of device according to graphics processing unit, and overproof product is rejected in the material-falling hopper, and each side of material-falling hopper inboard is provided with soft material; Bad coin is picked out device and is made up of control circuit, air-blast connection pipe, solenoid valve, special-purpose oriented nozzle and bearing structure, the opening and closing of solenoid valve are controlled by control circuit, air-blast connection pipe is connected on the inlet of solenoid valve, and the outlet of solenoid valve connects special-purpose oriented nozzle.

The principle of work of the present invention and the course of work are as follows:

The present invention adopts machine vision technique, promptly obtains real-time target image by imageing sensor, obtains defect information by image processing techniques again, has carried out the bad product letter sorting.

Light source is the benchmark and the reference source of system, when illumination detects target, provides system's reference signal.After the detection target is illuminated, surface signal (comprising pattern, background and defective) will be modulated on the reference signal.Modulation signal is imaged on the focal plane of camera after assembling by camera lens, camera is converted to electronic image signal by CCD with optical image signal and is input to graphics processing unit, after graphics processing unit is treated to the form that needs with picture signal, carry out various information extractions and processing, normal signal and flaw indication mark are come out, be distributed to display unit, alarm unit, performance element and database by computing machine.

In order to improve detection efficiency, system adopts the two-way parallel detection, as shown in Figure 2.The flower cake is fallen on the feed belt by feeder hopper, through mechanical positioner, makes that the movement locus left and right sides is controlled, is convenient to detect.When the sensor of coin in-position, determine exact position, coin front and back, in conjunction with the speed of travelling belt, trigger camera shutter, obtain accurately product picture signal in real time.When the product of finding not meet quality standard, control circuit is opened solenoid valve, and pressure-air is rejected defective from special-purpose oriented nozzle ejection.Defective falls into special-purpose material-falling hopper.

Claims (9)

1, a kind of automatic coin quality detection device is characterized in that comprising following structure: surface quality is set checks module, handle the tow sides data of flower cake respectively, and reject the defective coin according to testing result; Comprise combination lighting imaging source, the image receiving unit that connects successively, graphics processing unit, output unit and bad coin are picked out device as a result; The combination lighting imaging source adopts high and low angle area source lighting system simultaneously, can guarantee to obtain the image of coin surface complete display; Image receiving unit is gathered the view data on coin surface; Graphics processing unit is handled the view data of gathering, and determines faulty goods and rejecting according to production standard, real-time detected image and analysis result information can be sent to output unit as a result simultaneously; Bad coin is picked out the control information of device according to graphics processing unit, and overproof product is rejected.

2, a kind of automatic coin quality detection device according to claim 1, it is characterized in that described image receiving unit, comprise shooting support and camera system, described shooting support is fixed on the operating platform, combination lighting imaging source and camera system are fixed on the shooting support, gather the view data on coin surface along coin Surface Vertical direction.

3, a kind of automatic coin quality detection device according to claim 2 is characterized in that described camera system is area array CCD camera and high-resolution lens.

4, a kind of automatic coin quality detection device according to claim 2 is characterized in that being provided with light path between described shooting support and the camera system, strengthens anti-veiling glare interference performance.

5, a kind of automatic coin quality detection device according to claim 2 is characterized in that described operating platform also is provided with feed belt and mechanical positioner.

6, a kind of automatic coin quality detection device according to claim 1, it is characterized in that described graphics processing unit, comprise successively the positioning unit, the filter unit that connect, cut apart sampling unit and lopsided correcting unit, respectively by location, filtering, cut apart and with alignment technique the image of gathering carried out multi-scale filtering and various dimensions are handled, obtain flower cake qualitative data, determine faulty goods and rejecting according to production standard, real-time detected image and analysis result information can be sent to output unit as a result simultaneously.

7, a kind of automatic coin quality detection device according to claim 1 is characterized in that described output unit as a result comprises display unit, alarm unit, performance element and database, shows in real time, stores or print.

8, a kind of automatic coin quality detection device according to claim 1, it is characterized in that described bad coin picks out device, comprise control circuit, air-blast connection pipe, solenoid valve, special-purpose oriented nozzle, the opening and closing of solenoid valve are controlled by control circuit, air-blast connection pipe is connected on the inlet of solenoid valve, and the outlet of solenoid valve connects special-purpose oriented nozzle.

9, a kind of automatic coin quality detection device according to claim 1 is characterized in that also being provided with material-falling hopper, and each side of material-falling hopper inboard is provided with soft material.

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