CN102865836A

CN102865836A - Scanning type image detection method

Info

Publication number: CN102865836A
Application number: CN2011101840690A
Authority: CN
Inventors: 谢家振
Original assignee: DONGGUAN SUNRISE AUTOMATION Co Ltd
Current assignee: DONGGUAN SUNRISE AUTOMATION Co Ltd
Priority date: 2011-07-04
Filing date: 2011-07-04
Publication date: 2013-01-09
Anticipated expiration: 2031-07-04
Also published as: CN102865836B

Abstract

The invention discloses a scanning type image detection method which is finished by seven stations sequentially, wherein the first four stations of a machine table form into one group; a servo motor is used for driving four cameras and annular light sources for respectively detecting the flatness of Latch, an upper grip, a lower grip and a pin; the last three stations of the machine table form into another group; a servo motor is used for driving three cameras and annular light sources for respectively detecting the flatness and the true position of the pin; in the detection process, all strip-shaped light sources do not move, wherein products being detected do not move; the cameras, lenses and the light sources simultaneously move; and the detection of one product is finished by collecting and detecting 20-frame images per second. According to the image detection method, a computer is used for controlling a movement axis to drive the cameras and the light sources to move; the products are tested in a sectional type; output signals are synthesized; the high-speed cameras conduct scanning tests in high-speed movement, so that the testing time of a unit product is saved; small-pixel cameras are used for testing high-density plugs, so that the testing speed and the testing accuracy are ensured; and the testing accuracy and the repeatability are excellent.

Description

A kind of scan-type image detecting method

Technical field

The present invention relates to a kind of scan-type image detecting method of test connector product.

Background technology

At present because the significantly lifting of ccd image sensor resolution and the operational speed of a computer, vision system take digital image as the basis cooperates accurate mechanism location, the automatic optical detecting system that reaches the database of computer-aided design (CAD) and design has been applied to various fields, obtains accurate data for length and the width of measuring fast test product.

In order to guarantee the measuring accuracy of large-scale highly dense connector product, the method of generally taking in the prior art is for increasing the resolution (namely improving pixel) of CCD, but when product was excessive, the area array cameras of possibility 5,000,000 pixels or 1,000 ten thousand pixels did not reach required precision yet.In motion timesharing, the segmentation of product detect, general sectionalization test all is with the motion of PLC Control Shaft, measure the rear stop motion in position to one, certified products and unacceptable product are differentiated in test, and then move to next measuring position, successively circulation, when product when guide rail moves, may be because kinematic accuracy, guide precision and template precision cause measuring error, and detection time also can be very long.

Summary of the invention

The purpose of this invention is to provide and a kind ofly can guarantee test speed and precision, the scan-type image detecting method of test accuracy and good reproducibility.

The technical solution adopted for the present invention to solve the technical problems is: a kind of scan-type image detecting method, finished by seven stations successively, wherein front four stations of board are one group, drive four cameras and annular light source with a servo motor, detect respectively Latch, upper jaws, lower jaws and PIN pin flatness, three stations are one group behind the board, drive three cameras and annular light source with a servo motor, detect respectively PIN pin flatness and normotopia degree, all strip sources do not move in the testing process.

Further, product is motionless in the detection, and camera, camera lens and light source are mobile simultaneously, by per second collection, detection 20 two field pictures, finishes the detection of a product.

The invention has the beneficial effects as follows: move sectionalization test product, integrated output signal by computer controlled motion axle drive camera and light source, high speed camera is sweep test in fast moving, save the test duration of unit product, test highly dense plug with the small pixel camera, guarantee test speed and precision, test accuracy and good reproducibility, got rid of the impact of other interference on test, timesharing, sectionalization test, classification output certified products or unacceptable product, unacceptable product is directly discharged, and makes things convenient for procedure analysis.

Description of drawings

Fig. 1 is the arrangenent diagram of front four stations of board of the present invention;

Fig. 2 is the arrangenent diagram of three stations behind the board of the present invention.

Embodiment

Below in conjunction with drawings and Examples the present invention is described in further detail.

A kind of scan-type image detecting method, finished by seven stations successively, wherein front four stations of board are one group, drive four cameras and annular light source with a servo motor, detect respectively Latch, upper jaws, lower jaws and PIN pin flatness, three stations are one group behind the board, drive three cameras and annular light source with a servo motor, detect respectively PIN pin flatness and normotopia degree, all strip sources do not move in the testing process, further, product is motionless in the detection, camera, camera lens and light source are mobile simultaneously, by the per second collection, detect 20 two field pictures, finish the detection of a product.

With reference to shown in Figure 1, the function of front four stations of board is as follows: the first station is used for realizing that LATCH detects and the positive polishing of ring light, the second station is used for pop-off detection and the strip light ring light front light filling that adds backlight on the Shi Xian Clip mouth, the 3rd station is used for pop-off detection and the strip light ring light front light filling that adds backlight under the Shi Xian Clip mouth, and the 4th station is used for the detection of Shi Xian Clip mouth side PIN pin flatness and the positive polishing of ring light.

The principle of work of front four stations of board is as follows: stop after delivering a product to test bit, servomotor drives four light source controllers, the sweep test in movement of the camera that is connected with light source controller, camera lens and annular light source, the light source controller of the first station is tested respectively the Latch of the right and left, the light source controller of second and third station is tested respectively jaws and lower jaws, flatness and the coplane degree thereof of the light source controller test jaws limit stitch of the 4th station.

All test results of merging after test is finished, output OK or NG signal are also discharged respectively, sub-station delivers a product to test bit, begin test after stable, avoid the error that causes because of factors such as product motion and system accuracies, the sub-station test, is avoided the measuring error that causes because of each factors such as the mutual interference of light source phase and product orientation at the test duration of minimizing unit product.

With reference to shown in Figure 2, the function of three stations is as follows behind the board: the 5th station is used for the detection of Shi Xian Clip mouth dorsal part PIN pin flatness and the positive polishing of ring light, the 6th station is used for Shi Xian Clip mouth side PIN pin normotopia degree and detects and the polishing of the strip light back side, and the 7th station is used for Shi Xian Clip mouth dorsal part PIN pin normotopia degree and detects and the polishing of the strip light back side.

The principle of work of three stations is as follows behind the board: stop after delivering a product to test bit, servomotor drives the camera sweep test in movement on three light source controllers, flatness and the coplane degree of the light source controller test jaws dorsal part stitch of the 5th station, the normotopia degree of the light source controller test jaws limit stitch of the 6th station, the normotopia degree of the light source controller test jaws dorsal part stitch of the 7th station.

All test result sub-station output OK of merging or NG signal and respectively discharge after test is finished, sub-station delivers a product to test bit, begin test after stable, avoid the error that causes because of factors such as product motion and system accuracies, the sub-station test, reduce the test duration of unit product, avoid the measuring error that causes because of each factors such as the mutual interference of light source phase and product orientation.

The invention has the beneficial effects as follows: adopt 300,000 pixel high-speed CCD cameras, moved by computer controlled motion axle drive camera and light source, the sectionalization test product, integrated output signal, high speed camera is sweep test in fast moving, save the test duration of unit product, test highly dense plug with the small pixel camera, guarantee test speed and precision, test accuracy and good reproducibility have been got rid of the impact of other interference on test, timesharing, sectionalization test, classification output certified products or unacceptable product, unacceptable product is directly discharged, and makes things convenient for procedure analysis.

Above-described embodiment is illustrative principle of the present invention and effect thereof only; and the embodiment of part utilization, for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design; can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims

1. scan-type image detecting method, it is characterized in that: finished by seven stations successively, wherein front four stations of board are one group, drive four cameras and annular light source with a servo motor, detect respectively Latch, upper jaws, lower jaws and PIN pin flatness, three stations are one group behind the board, drive three cameras and annular light source with a servo motor, detect respectively PIN pin flatness and normotopia degree, all strip sources do not move in the testing process.

2. detection method according to claim 1 is characterized in that, product is motionless in the detection, and camera, camera lens and light source are mobile simultaneously, by per second collection, detection 20 two field pictures, finishes the detection of a product.