CN211802425U - An automatic monitoring instrument for the appearance of silicone rubber products - Google Patents

Abstract

The utility model provides an automatic monitoring and testing instrument for the appearance of silicone rubber products, which comprises a tooling base, a conveyor belt, a conveyor belt driving motor, a detection mechanism and an industrial computer fixedly mounted under the tooling base. The detection mechanism comprises a lighting device, a camera and a Photoelectric switch, the camera is fixed on one side of the tooling base through a mounting bracket, the lighting device is mounted on the lower end of the camera, and a shading cylinder is also provided below the lighting device, and the shading cylinder is fixed on the on the mounting bracket; the photoelectric switch is arranged on one end of the tooling base close to the feeding port of the conveyor belt, and the center line of the photoelectric switch and the edge of the shading cylinder are located on the same vertical plane; the industrial control The machine is respectively connected with the camera, the lighting device, the photoelectric switch and the conveyor belt drive motor. The utility model has the advantages of high efficiency, high accuracy and good quality control.

Description

An automatic monitoring instrument for the appearance of silicone rubber products

technical field

The utility model relates to the field of testing equipment, in particular to an automatic monitoring and testing instrument for the appearance of silicone rubber products.

Background technique

Silicone products (such as remote control button panels) need to be inspected for their appearance after the production is completed. Appearance inspection mainly focuses on its color, surface silk screen pattern, oil stain, color difference, etc. At present, these types of appearance inspections are mainly carried out manually. For visual inspection, manual visual inspection can meet certain production requirements, but there are also major defects, such as low manual operation efficiency, high labor intensity, high labor cost, easy eye fatigue, and large health risks, which are prone to errors. The detection accuracy is not high.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the background technology, the utility model proposes an automatic monitoring and detecting instrument for the appearance of silicone rubber products.

An automatic monitoring and testing instrument for the appearance of a silicone rubber product, comprising a tooling base, a conveyor belt and a conveyor belt driving motor fixed on the tooling base, at least one detection mechanism arranged above the conveyor belt, and fixed under the tooling base. The detection mechanism includes a lighting device, a camera and a photoelectric switch, the camera is fixed on one side of the tooling base through a mounting bracket, the lighting device is installed at the lower end of the camera, and a lower part of the lighting device is also provided There is a shading cylinder, and the shading cylinder is fixed on the mounting bracket through a fixing rod; the photoelectric switch is arranged on the end of the tooling base close to the feeding port of the conveyor belt, and the center line of the photoelectric switch is in line with the The edges of the shading tube are located on the same vertical plane; the industrial computer is respectively connected with the camera, the lighting device, the photoelectric switch and the conveyor belt drive motor.

Based on the above, it also includes an on-site PC, and an image capture card is inserted into the on-site PC, and the image capture card is connected with the camera; the on-site PC is also connected with the industrial computer.

Based on the above, the end of the tooling base that is far away from the feeding port of the conveyor belt is also provided with an air blowing pipe, and an air pump connected to the air blowing pipe is also arranged under the tooling base, and the air pump communicates with the industrial control system through a field bus. machine communication connection.

Based on the above, the mounting bracket includes a fixing block for fixing on the side wall of the tooling base and a support rod fixed on the fixing block, the support rod is sleeved with a connecting rod, and the connecting rod is The movable end is a connecting plate, and the camera is fixed on the connecting plate.

Based on the above, the light-shielding cylinder and the fixing rod have an integral structure.

Compared with the prior art, the present utility model has substantial features and advancements. Specifically, the present utility model integrates the automatic monitoring and testing instrument for the appearance of silicone rubber products by arranging a lighting device, a shading cylinder, a camera, a photoelectric switch and a conveyor belt. It can replace manual detection of products, with high accuracy and high efficiency, and can eject unqualified products through the blowing pipe when detecting unqualified products, thereby preventing unqualified products from mixing with qualified products and improving quality control capabilities.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Figure 1 is a schematic structural diagram of the present invention.

In the picture: 1. Tooling base; 2. Conveyor belt; 3. Conveyor belt drive motor; 4. Industrial computer; 5. Camera; 6. Lighting device; 7. Photoelectric switch; 8. Shading cylinder; 9. Field PC; 10. Blow pipe.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1 , an automatic monitoring instrument for the appearance of a silicone rubber product includes a tooling base 1 , a conveyor belt 2 fixed on the tooling base 1 , a conveyor belt drive motor 3 , and at least one conveyor belt 2 arranged above the conveyor belt 2 . A detection mechanism and an industrial computer 4 fixedly mounted under the tooling base 1, the detection mechanism includes a lighting device 6, a camera 5 and a photoelectric switch 7, and the camera 5 is fixed on one side of the tooling base 1 through a mounting bracket, The illuminating device 6 is installed at the lower end of the camera 5, and a shading cylinder 8 is also arranged below the illuminating device 6, and the shading cylinder 8 is fixed on the mounting bracket by a fixing rod; preferably, the shading cylinder 8 It is an integral structure with the fixing rod; the photoelectric switch 7 is arranged on one end of the tooling base 1 close to the feeding port of the conveyor belt 2, and the center line of the photoelectric switch 7 is connected to the edge of the shading cylinder 8. On the same vertical plane, preferably, the photoelectric switch 7 is an opposite-beam photoelectric switch 7; the industrial computer 4 is driven by the camera 5, the lighting device 6, the photoelectric switch 7 and the conveyor belt respectively. Motor 3 is connected.

Specifically, the mounting bracket includes a fixing block for fixing on the side wall of the tooling base 1 and a support rod fixed on the fixing block, the support rod is sleeved with a connecting rod, and the connecting rod The active end of the camera 5 is a connecting plate, and the camera 5 is fixed on the connecting plate.

In practical applications, different cameras 5 , such as a line scan CCD, an area array CCD, a monochrome camera 5 and a color camera 5 can be selected according to different practical applications. According to the needs of the application, the camera 5 can output standard monochrome video (RS-170/CCIR), composite signal (Y/C), RGB signal, and can also output non-standard progressive scan signal, line scan signal, high resolution When choosing a camera 5 lens, you should pay attention to: focal length, target height, image height, magnification, distance from the image to the target, distortion, etc.

The number of the detection mechanism can be one or more. If there are multiple detection mechanisms, all the detection mechanisms are sequentially arranged above the conveyor belt 2 along the conveying direction of the conveyor belt 2, and can also pass the image. The acquisition card is used to switch to acquire the image data of the multi-channel cameras 5, or simultaneously acquire the image data of the multi-channel cameras 5 through synchronous control.

When using an image capture card, it is usually necessary to install the image capture card in the computer host in the form of an inserted card, and its main job is to transmit the image data output by the camera 5 to the computer host. The analog signal or digital signal is converted into an image data stream in a certain format, and at the same time, some parameters of the camera 5 can be controlled, such as trigger signal, exposure/integration time, shutter speed, and the like.

Under normal circumstances, for different types of cameras 5, the frame capture card can have different hardware structures and different bus forms, such as PCI, PCI64, Compact PCI, PCIO4, ISA, etc., and the frame capture card directly determines the interface of the camera 5. : black, color, analog, digital, etc., typically a PCI or AGP compatible capture card, which can quickly transmit image data to a PC for processing.

It should also be noted that lighting is an important factor affecting the input of a machine vision system, which directly affects the quality and application of the input data. Therefore, in order to further improve the imaging quality of the camera 5, a corresponding lighting device 6 may also be selected for each specific application instance to achieve the best effect. According to the visibility of light, the lighting devices 6 can be divided into visible light lighting and invisible light lighting. The commonly used visible light lighting devices 6 are incandescent lamps, fluorescent lamps, mercury lamps and sodium lamps.

In other embodiments, the lighting device 6 can also be selected as backlight illumination, structured light and stroboscopic lighting according to the illumination method, wherein the backlight illumination means that the object to be measured is placed between the light source and the camera 5, and its The advantage is that high-contrast images can be obtained; structured light illumination projects gratings or line light sources onto the measured object, and demodulates the three-dimensional information of the measured object according to the distortion produced by them; stroboscopic lighting is to convert high-frequency When the light pulse is irradiated on the object, instantaneous high-intensity illumination can be obtained, but the camera 5 shooting requires synchronization with the light source.

Further, the end of the tooling base 1 away from the feed port of the conveyor belt 2 is also provided with an air blowing pipe 10, and an air pump communicating with the air blowing pipe 10 is also provided below the tooling base 1, and the air pump passes through the air blowing pipe 10. The field bus is connected to the industrial computer 4 in communication, and is used to control the blowing pipe to eject the unqualified products when the unqualified products are detected, so as to prevent the unqualified products from being mixed into the qualified products and improve the quality control ability.

Specifically, the automatic automatic monitoring and detection instrument further includes an industrial computer 9, and an image capture card is inserted into the industrial computer 9, and the image capture card is connected to the camera 5; the industrial computer 9 is also connected to the The IPC 4 is connected. Specifically, machine vision software is installed on the industrial computer 4 to process the image data sent by the detector, and then obtain a result through a certain operation. The output result may be PASS/FAIL signal, coordinate position, string etc. Common machine vision software comes in the form of C/C++ image library, Active X control, graphical programming environment, etc., which can be dedicated functions (such as only used for LCD inspection, BGA inspection, template alignment, etc.), or general purpose. Purpose (including positioning, measurement, barcode/character recognition, spot detection, etc.).

The industrial computer 9 also includes control equipment, such as I/O, motion control unit, level conversion unit, etc., once the vision software completes the image analysis (unless it is only used for monitoring), the control equipment and external units are required to communicate In order to complete the control of the production process; some simple controls can directly use the I/O that comes with some frame grabbers, while relatively complex logic/motion control must rely on additional programmable logic control units/motion control cards to achieve the necessary action.

The working process of the appearance inspection based on the industrial computer 9 is as follows:

1. When the photoelectric switch 7 detects that the object to be detected has moved to the center of the field of view of the camera 5, it sends a trigger signal to the industrial computer 4;

2. The industrial computer 4 sends a stop signal to the conveyor belt drive motor 3 according to the trigger signal to control the conveyor belt 2 to stop moving. The lighting device 6 sends out a trigger pulse;

3. The camera 5 opens the electronic shutter, and the exposure time can be set in advance;

4. The lighting device 6 is turned on, and the turn-on time of the light should match the exposure time of the camera 5;

5. After the camera 5 is exposed, the scanning and output of a frame of image are officially started;

6. The image capture card receives the analog video signal and digitizes it through A/D, or directly receives the digital image data digitized by the camera 5, and stores it in the memory of the industrial computer 9;

7. The machine vision software of the industrial computer 9 processes, analyzes and recognizes the image data to obtain measurement results or logical control values;

The industrial computer 9 issues a control command to the industrial computer 4 according to the processing result, so as to control the movement of the conveyor belt 2, perform positioning, correct movement errors, and the like.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

Claims (5)

1. An appearance automatic monitoring detector for silicon rubber products is characterized in that: the detection mechanism comprises a lighting device, a camera and a photoelectric switch, wherein the camera is fixed on one side of the tool base through an installation support, the lighting device is installed at the lower end of the camera, a shading cylinder is further arranged below the lighting device, and the shading cylinder is fixed on the installation support through a fixing rod; the photoelectric switch is arranged at one end, close to the feeding hole of the conveyor belt, of the tooling base, and the center line of the photoelectric switch and the edge of the shading cylinder are located on the same vertical plane; the industrial personal computer is respectively connected with the camera, the lighting device, the photoelectric switch and the conveyor belt driving motor.

2. The automatic appearance monitor for silicone rubber products according to claim 1, wherein: the system also comprises an on-site PC (personal computer), wherein an image acquisition card is also inserted into the on-site PC and is connected with the camera; and the field PC is also connected with the industrial personal computer.

3. The automatic appearance monitor for silicone rubber products according to claim 2, wherein: the tool base is provided with a conveyor belt feeding hole, an air blowing pipe is further arranged at one end, far away from the conveyor belt feeding hole, of the tool base, an air pump communicated with the air blowing pipe is further arranged below the tool base, and the air pump is in communication connection with the industrial personal computer through a field bus.

4. The automatic appearance monitoring and detecting instrument for silicone rubber products according to claim 1, 2 or 3, characterized in that: the mounting bracket comprises a fixing block for fixing the side wall of the tool base and a supporting rod fixedly arranged on the fixing block, wherein a connecting rod is sleeved on the supporting rod, the movable end of the connecting rod is a connecting plate, and the camera is fixed on the connecting plate.

5. The automatic appearance monitoring and detecting instrument for silicone rubber products according to claim 1, 2 or 3, characterized in that: the shading cylinder and the fixing rod are of an integrated structure.

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