CN103616043B - A kind of machine vision device of double-face imaging - Google Patents

Abstract

The invention discloses a kind of machine vision device of double-face imaging, comprise camera, mirror, wedge, mounting groove and trip bolt; Described mounting groove is rectangular build, its centre, bottom has the through hole of strip along its length, in mounting groove, be provided with wedge, the bottom of wedge is provided with trip bolt, trip bolt is through through hole, fix by clamp nut, be provided with mirror on wedge, a side and the mounting groove of mirror are hinged; Described camera be arranged on mounting groove directly over. The present invention has realized a camera and has gathered simultaneously the positive and negative both sides image of a workpiece, has realized the high flexibility of adjusting imaging effect, can adjust according to concrete workpiece feature at any time; Total does not produce larger variation because of extraneous variation of ambient temperature, ensures good environmental suitability; Simple in structure, convenient disassembly, can take off at any time device and clear up maintenance.

Description

A machine vision device with double-sided imaging

technical field

The invention belongs to the field of equipment installation, in particular to the field of machine vision, and specifically relates to a double-sided imaging machine vision device.

Background technique

Machine vision technology is more and more widely used in the detection of industrial products. In order to comprehensively detect the characteristic information of products, new requirements are often put forward for the peripheral equipment of the vision system except cameras. There are following problems in practical applications: (1) One camera can only collect images of one side of the workpiece, and at least two cameras are required to collect information on the front and back sides of the workpiece, which will inevitably increase the cost of the vision system; (2) Most of the vision inspection systems in industrial applications are installed in On the assembly line, there is a conflict between installing the camera on the front and back and the movement of the conveyor; (3) installing the camera on the front and back will result in no place for the light source to be installed, and the rear lighting system cannot be applied directly; (4) Even if it is feasible, an extra pair of light source and camera will increase the cost of the system. In addition, in the application of the vision system in complex industrial occasions, the installation frame is also required to have flexible adjustment capabilities. At present, there is no device that can provide the machine vision system to enable it to collect the front and back information of the workpiece. Only detecting information on one side of the workpiece will directly lead to unqualified products flowing to the next process or entering the consumer market. Poor shock resistance will cause blurred shadows in the image information collected by the vision system. The limited adjustment ability will greatly reduce the flexibility of the vision system. All of these make the traditional vision system unable to meet the ideal detection requirements, and also restrict the application field of machine vision. The online detection method based on machine vision technology has a wide range of applications in industrial manufacturing due to its fast detection speed, high precision, and many measurement items.

Contents of the invention

The invention provides a double-sided imaging machine vision device aiming at the deficiencies of the prior art.

A double-sided imaging machine vision device of the present invention includes a camera, a mirror, a wedge, a mounting groove and a fastening screw;

The installation groove is cuboid, with a long through hole in the middle of the bottom along the length direction, a wedge block is arranged in the installation groove, and a fastening screw is arranged at the bottom of the wedge block, and the fastening screw passes through the through hole , fixed by fastening nuts, a mirror is arranged on the wedge-shaped block, and one side of the mirror is hinged with the installation groove; the camera is arranged directly above the installation groove.

In order to ensure that the imaging range is within the depth of field, it is enough to move the wedge to adjust the inclination of the mirror appropriately. The adjustment range is 8-30°. Specifically, it is calculated according to the following depth of field formula when used on site. is the focal length of the lens, Aperture value for lens shooting, is the focus distance, is the diameter of the permissible circle of confusion;

.

The beneficial effects that the present invention has:

1. Realized that one camera simultaneously collects images of both sides of the front and back of a workpiece.

2. Realize the high flexibility of adjusting the imaging effect, which can be adjusted according to the specific workpiece characteristics at any time;

3. The entire structure does not change greatly due to changes in the external ambient temperature, ensuring good environmental adaptability;

4. The structure is simple, easy to disassemble, and the device can be removed at any time for cleaning and maintenance.

Description of drawings

Fig. 1 is a structural front view of the present invention;

FIG. 2 is a top view of the double-sided imaging device of the present invention.

detailed description

The present invention will be further explained below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a double-sided imaging machine vision device of the present invention includes a camera 1, a mirror 3, a wedge 4, a mounting groove 5 and a fastening screw 6;

Described mounting groove is rectangular parallelepiped shape, and there is elongated through-hole 7 along the length direction in the middle of its bottom, is provided with wedge-shaped block 4 in the mounting groove, and the bottom of wedge-shaped block 4 is provided with fastening screw 6, and fastening screw Through the through hole 7, fixed by a fastening nut, a mirror 3 is arranged on the wedge block 4, and one side of the mirror is hinged with the mounting groove; the camera 1 is arranged directly above the mounting groove 5;

When working, the workpiece 2 is placed directly under the camera 1, and the wedge block 3 can push the rotation of the mirror 1 by moving the fastening screw 2, thereby causing the angle between the mirror surface and the workpiece to change.

Claims (1)

1. a machine vision device for double-face imaging, comprises camera, mirror, wedge, mounting grooveAnd trip bolt;

It is characterized in that: described mounting groove is rectangular build, open along its length its centre, bottomHave the through hole of strip, be provided with wedge in mounting groove, the bottom of wedge is provided with trip bolt,Trip bolt, through through hole, is fixed by clamp nut, is provided with mirror on wedge, mirrorOne side and mounting groove are hinged; Described camera be arranged on mounting groove directly over;

In order to guarantee areas imaging in field depth, mobile wedge suitably regulates minute surface inclination angleCan, adjustable range is 8～30 °, while specifically use at the scene, calculates according to following depth of field formula,Wherein f is lens focus, and F is lens shooting f-number, L be focusing from, δ is for allowing blur circleDiameter;

$\mathrm{\Δ}L=\frac{2f^2{\mathrm{F\δL}}^2}{f^4-F^2{\mathrm{\δ}}^2{L}^2}.$