CN203732031U

CN203732031U - Cross-shaped key tooth form size detection apparatus

Info

Publication number: CN203732031U
Application number: CN201420112774.9U
Authority: CN
Inventors: 沈鹏程; 孙坚; 钟少俊; 徐红伟; 张海波; 朱少诚
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2014-03-13
Filing date: 2014-03-13
Publication date: 2014-07-23
Anticipated expiration: 2024-03-13

Abstract

The utility model discloses a cross-shaped key tooth form size detection apparatus. A backlight source is placed on a U-shaped object bearing platform, a fixed plate is vertically fixed on a side face of the object bearing platform, the center of the fixed plate is provided with a 90 degree rotating air cylinder, a handle part of a cross-shaped key is fixed on a clamp, an air pump and a PLC is connected with the 90 degree rotating air cylinder through a solenoid valve, a CCD camera is placed above a cross-shaped key tooth form part to be detected, the camera is connected with a computer host through an image acquisition card, a display device is connected with the computer host, and the PLC is connected with the computer host. The cross-shaped key tooth form size detection apparatus is characterized in that the outline of the key tooth form part is clearly presented in a camera visual field scope through illumination of the backlight source, image interference is removed through image processing operation, a tooth form image boundary is positioned, and distance between opposite sides of the tooth form part can be calculated. An Omnibearing image of the key tooth form part can be collected through a 90 degree rotating mechanism, whether a product is qualified can be determined according to an interval among image sampling points and a preset threshold value, and the problem that real-time on-line detection cannot be realized through a traditional detection mode can be solved.

Description

A kind of pick-up unit of cross shaped as key bit size

Technical field

The utility model relates to machine vision on-line measuring device, is specifically related to a kind of pick-up unit of cross shaped as key bit size.

Background technology

Cross key is a kind of key type conventional in daily life, coordinate cross lock core, be used on antitheft door more, due to its special tooth-shape structure, in coaxial four directions that differ 90 degree, all there is a profile of tooth, make its profile of tooth quality of manual detection have a lot of problems: cost of labor is high, and efficiency is low, work long hours because people's kopiopia inevitably can produce flase drop and undetected, artificial sampling observation is difficult to realize real-time online and detects.

Machine vision is a kind of novel detection method, has been widely used in the fields such as dimensional measurement, measurement of angle, defects detection, has the fast precision advantages of higher of speed.

Summary of the invention

For the problem existing in background technology, the purpose of this utility model is to provide a kind of pick-up unit of cross shaped as key bit size, effectively solves in cross shaped as key bit size detection cost of labor high, the problem such as detection speed is slow, and automaticity is low.

The technical solution adopted in the utility model is as follows:

The utility model comprises U-shaped objective table, backlight, backlight power supply adaptor, backlight position stationary shaft, fixed head, 90 degree rotary cylinders, pincer-like fixture, air pump, PLC, CCD camera, bracing frame, image pick-up card, display and main frame.

Backlight lies in a horizontal plane on the end face of U-shaped objective table both sides, is fixed by four backlight position stationary shaft, and backlight is connected with backlight power supply adaptor; Fixed head is vertically fixed on a side of objective table, at fixed head center, energy 90 of inside horizontal setting is spent rotary cylinder, the shank of cross key to be detected is fixed in the pincer-like fixture of 90 degree rotary cylinder ends, the turning axle of pincer-like fixture and 90 degree rotary cylinders joins, pincer-like fixture is positioned at the top of backlight, air pump is connected with the air intake opening of 90 degree rotary cylinders, and PLC is connected with the piston of 90 degree rotary cylinders by solenoid valve; Bracing frame is vertically arranged on the opposite side base of objective table, CCD camera is arranged on above bracing frame, CCD camera is positioned at the top of cross shaped as key bit part to be detected, CCD camera is connected with main frame through image pick-up card, display is connected with main frame, and PLC is connected with main frame.

Compared with background technology, the beneficial effect the utlity model has is:

The utility model is applied to machine vision technique in cross shaped as key bit size detection, within shaped as key bit clear-cut being presented on to camera field range with backlight irradiation, use image processing techniques remove image disruption, accurately locate profile of tooth image boundary, calculate profile of tooth opposite side distance from.For the special tooth profile structure of cross key, 90 degree rotating mechanisms are designed, realize the omnibearing image acquisition of shaped as key bit, whether qualified according to the threshold determination product of the spacing of image sampling point and setting, having solved traditional detection mode can not detect by real-time online, the problem time-consuming, precision is low.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the partial enlarged drawing of 90 degree rotary cylinders and pincer-like fixtures in Fig. 1.

Fig. 3 is a kind of structural representation of cross key.

In figure: 1, U-shaped objective table, 2, backlight, 3, backlight power supply adaptor, 4, backlight position stationary shaft, 5, fixed head, 6,90 degree rotary cylinders, 7, pincer-like fixture, 8, air pump, 9, PLC, 10, CCD camera, 11, bracing frame, 12, image pick-up card, 13, display, 14, main frame.

Embodiment:

Below in conjunction with the drawings and specific embodiments, the utility model is further described.

As shown in Figure 1, the utility model comprises U-shaped objective table 1, backlight 2, backlight power supply adaptor 3, backlight position stationary shaft 4, fixed head 5,90 degree rotary cylinders 6, pincer-like fixture 7, air pump 8, PLC 9, CCD camera 10, bracing frame 11, image pick-up card 12, display 13 and main frame 14.

Backlight 2 lies in a horizontal plane on U-shaped objective table 1 both sides end face, and fixing by four backlight position stationary shaft 4, backlight 2 is connected with backlight power supply adaptor 3; Fixed head 5 is vertically fixed on a side of objective table 1, spend rotary cylinder 6 at fixed head 5 center energy 90 of inside horizontal setting, the shank of cross key to be detected is fixed in the pincer-like fixture 7 of 90 degree rotary cylinder 6 ends, the turning axle of pincer-like fixture 7 and 90 degree rotary cylinders 6 joins, pincer-like fixture 7 is positioned at the top of backlight 2, air pump 8 is connected with the air intake opening of 90 degree rotary cylinders 6, and PLC 9 is connected with the piston of 90 degree rotary cylinders 6 by solenoid valve.

Bracing frame 11 is vertically arranged on the opposite side base of objective table 1, CCD camera 10 is arranged on above bracing frame 11, CCD camera 10 is positioned at the top of cross shaped as key bit part to be detected, the image pick-up card of CCD camera 10 through matching is connected with main frame 14, display 13 is connected with main frame 14, and PLC 9 is connected with main frame 14.

Above device, according to design needs, all can be chosen and obtain on market.

As shown in Figure 2, when 90 degree rotary cylinders receive the control signal that PLC 9 sends, 90 degree rotary cylinders drive rotating shaft dextrorotations to turn 90 degrees, pincer-like fixture 7 also dextrorotation simultaneously turn 90 degrees, realize in testing process the omnibearing image acquisition of cross shaped as key bit.

As shown in Figure 3, be a kind of structural representation of cross key, key all has profile of tooth on coaxial four direction, and between each profile of tooth, angle is 90 degree.

The utility model is applicable to the cross shaped as key bit size detection of different size, has improved accuracy of detection and speed.

Claims

1. A detection device for the size of a cross-shaped key tooth, which is characterized in that it includes a U-shaped stage (1), a backlight (2), a backlight power adapter (3), and a backlight position fixing shaft (4) , fixed plate (5), 90-degree rotating cylinder (6), pincer fixture (7), air pump (8), PLC (9), CCD camera (10), support frame (11), image acquisition card (12) , a monitor (13) and a computer host (14); the backlight source (2) is horizontally placed on the end faces of both sides of the U-shaped stage (1), fixed by four backlight position fixing shafts (4), and the backlight source (2) ) is connected with the backlight power adapter (3); the fixed plate (5) is vertically fixed on one side of the stage (1), and a cylinder (6) capable of rotating 90 degrees is placed horizontally inward at the center of the fixed plate (5) , the handle of the cross-shaped key to be detected is fixed in the pincer fixture (7) at the end of the 90-degree rotary cylinder (6), and the pincer fixture (7) is connected with the rotating shaft of the 90-degree rotary cylinder (6). The shaped fixture (7) is located above the backlight (2), the air pump (8) is connected to the air inlet of the 90-degree rotating cylinder (6), and the PLC (9) is connected to the piston of the 90-degree rotating cylinder (6) through a solenoid valve ;The support frame (11) is vertically arranged on the base of the other side of the stage (1), the CCD camera (10) is installed on the support frame (11), and the CCD camera (10) is located on the cross-shaped key tooth shape to be detected. On the top of the part, the CCD camera (10) is connected to the host computer (14) through the image acquisition card, the display (13) is connected to the host computer (14), and the PLC (9) is connected to the host computer (14).