CN110694938A - Rotary disc type veneer grading device and grading method - Google Patents

Abstract

A turntable type veneer grading device and grading method, the grading device includes a transmission device, an image recognition device is arranged in the running direction of the transmission device, and the end of the transmission device is provided with a turntable type plate dividing device, The image recognition device is connected with a turntable type plate separating device, which includes a turntable driven by the motor I to rotate, and a material frame for carrying veneers of different quality grades is arranged on the turntable. The veneer boards on the conveying device are recognized and graded by the image recognition device, and the image recognition device transmits the quality grading information to the turntable type de-laminating device, so that the veneer boards fall into the material frame matching the quality grade. It effectively avoids the damage of thin boards during quality grading.

Description

Rotary disc type veneer grading device and grading method

technical field

The invention relates to the technical field of veneer processing, in particular to a turntable type veneer grading device and a grading method.

Background technique

In recent years, the demand for veneer boards has continued to rise, but the production process still relies heavily on labor and the production efficiency is low. Therefore, an intelligent auxiliary system is urgently needed to improve efficiency. At present, the main detection methods for surface defects of blockboard at home and abroad include manual detection method and photoelectric detection. Manual detection relies too much on manual experience, which can easily lead to inaccurate quality grading and low work efficiency due to personal experience; photoelectric detection can only detect whether there are holes in the board, but cannot identify the scar pattern, nor can it accurately grade the board. As an important branch of artificial intelligence that is developing rapidly, machine vision uses machines to replace human eyes to measure and judge, and has the characteristics of high speed, high accuracy and labor saving. Although machine vision has been applied in the field of veneer at present, but after the veneer is graded, there is no efficient mechanical automation equipment to classify it according to different qualities, and it is often processed manually by picking it up, which increases the labor intensity of workers and makes work more difficult. low efficiency. In order to solve the defects of manual picking method, the following methods are used: 1. Sorting by mechanical arm, but the price is expensive; 2. Using linear reciprocating drive mechanism to push, but due to the thin board, it is difficult for the linear reciprocating drive mechanism to remove the thin board. The wooden boards are pushed down from the side of the running conveyor belt. During this process, it is easy to cause damage to the thin boards, which affects the quality of the grading of the thin boards. This is where the prior art differs.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a turntable type veneer grading device and a grading method for the deficiencies in the prior art, which can improve the efficiency of veneer quality grading, and reduce the impact on veneer during quality grading. damage.

This solution is realized by the following technical measures: a rotary disc type veneer grading device, including a transmission device, an image recognition device is provided in the running direction of the transmission device, and the end of the transmission device is provided with a rotary disc type classification device. Plate device, the image recognition device is connected with the turntable type plate separation device, the turntable type plate separation device includes a turntable driven by motor I to rotate, and the turntable is provided with a material frame for carrying veneers of different quality grades. By adopting this technical solution, the veneer on the transmission device is identified by the image recognition device and the quality of the veneer is graded, and the image recognition device transmits the quality grading information to the rotary plate-type separating device, so that the veneer falls into the same quality grade The matching material frame effectively avoids the damage of the veneer during the quality grading.

Preferably, an inclined guide plate is provided at the end of the transmission device, and the guide plate is arranged between the transmission device and the turntable type plate separating device. With this technical solution, the thin board falls into the material frame along the guide plate under the action of gravity.

Preferably, the image recognition device includes an industrial CCD camera and a controller connected to the industrial CCD camera, and the controller is connected to the motor I.

Preferably, the industrial CCD camera is fixedly arranged on the bracket, and the industrial CCD camera is arranged just above the conveying plane of the transmission device.

Preferably, the transmission device includes a conveyor belt driven by a motor II, and the motor II is connected to the controller.

Preferably, the transmission device is provided with a photoelectric detection switch for detecting whether the veneer runs directly below the industrial CDD camera, and the photoelectric detection switch is connected to the controller.

Preferably, the material frame is detachably fixed on the turntable.

A turntable type veneer grading method, comprising the following steps:

The conveying device conveys the veneer to run, when the veneer runs directly below the industrial CCD camera, the controller controls the industrial CCD camera to take pictures to obtain the surface image of the veneer, and the industrial CCD camera uploads the acquired surface image of the veneer to the controller,

The controller recognizes and calculates the number, area and perimeter of holes and scars on the surface image of the veneer, and compares the number, area and perimeter thresholds of holes and scars pre-set in the controller for quality Classify and transmit the classification information to the motor I, the motor I drives the turntable so that the material frame corresponding to the quality grade of the veneer corresponds to the position of the transmission device;

The conveyor continues to transport the veneers until the veneers fall into the material box corresponding to the quality class.

Preferably, it is judged whether the veneer board runs directly below the industrial CCD camera through the photoelectric detection switch arranged on the transmission device.

Preferably, the conveying device and the turntable type plate separating device are provided with inclined guide plates, and the veneer boards fall into the material frame corresponding to the quality grade of the veneer boards through the guide and conveying plates.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The present invention uses an industrial CCD camera to obtain the surface image of the veneer. Compared with ordinary cameras, the industrial CCD camera has high comparability in resolution, frame rate, light requirements, exposure methods, etc.; After image, upload the image information to the controller for processing. Image processing includes image extraction, binarization, filtering, edge detection, filling and erosion.

(2) The present invention adopts a turntable type board sorting device to sort the wood boards that have completed the quality classification. The veneer board continues to move on the conveyor belt after extracting the surface image. Before the veneer board is transported to the end of the conveyor belt, the controller transmits the classification information to the Rotary plate splitting device, according to the received grading information, the rotary table rotates the rotary table through the motor I to align the corresponding material basket with the guide plate at the end of the conveyor belt, and the veneer will slide from the guide plate to the corresponding material basket. During the process, the motor I rotates the turntable to return to its original position, and so on and so forth. Each grade of veneer has a material basket corresponding to it, that is to say, the controller controls the motor I to rotate at different angles to correspond to different grades of veneer. In addition, according to the different divisions of the quality level of the veneer, the workstations of the material baskets can be correspondingly increased or decreased, and the material baskets are arranged at an equal angle.

The advantage of the present invention is that, by setting the number threshold, area threshold and perimeter threshold of the veneer holes and scars in the image processing program in the controller, the veneer quality grading of different standards can be realized, and the image processing program is based on Visual Studio The platform is written with Opencv3.0 as a plug-in, without the need for complex algorithm design, which greatly simplifies the program and reduces the requirements for users. Then, by controlling the rotation of the turntable, the veneers that have completed the quality grading are distinguished, picked up, and graded at the same time. The material basket in the board picking device can be freely increased or decreased according to the requirements of the user, which improves the versatility. The principle of the invention is reasonable and reliable, the structure is simple and convenient for manufacture and installation, the expansibility is strong, the versatility is high, and the invention has a very wide market prospect and application prospect.

It can be seen that, compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious.

Description of drawings

Fig. 1 is the plane structure schematic diagram of turntable type veneer classification device;

Figure 2 is a schematic diagram of the installation of an industrial CCD camera;

Fig. 3 is the structural representation of the turntable type plate splitting device;

Fig. 4 is the working flow chart of the rotary disc type veneer classification method.

In the picture: 1-stand, 101-industrial CCD camera, 102-photoelectric detection switch, 201-motor II, 202-rotating shaft, 203-conveyor belt, 301-turntable, 302-303-304-305-materials of different quality grades Box, 306-motor I, 4-guide plate.

Detailed ways

In order to clearly illustrate the technical features of the present solution, the present solution will be described below through specific embodiments and in conjunction with the accompanying drawings.

A turntable type veneer grading device, including a transmission device, an image recognition device is arranged in the running direction of the transmission device, and a turntable type plate dividing device is arranged at the end of the transmission device, and the image recognition device The plate-splitting device is connected, and the turntable-type plate-splitting device includes a turntable driven and rotated by a motor I, and a material frame for carrying veneers of different quality grades is arranged on the turntable.

The end of the transmission device is provided with an inclined guide plate, and the guide plate is arranged between the transmission device and the turntable plate separating device.

The image recognition device includes an industrial CCD camera and a controller connected with the industrial CCD camera, and the controller is connected with the motor I.

The industrial CCD camera is fixedly arranged on the bracket, and the industrial CCD camera is arranged just above the conveying plane of the transmission device.

The transmission device includes a motor II with an adjustable speed, a rotating shaft and a conveyor belt with a black surface color, and the motor II is connected with the controller.

The transmission device is provided with a photoelectric detection switch for detecting whether the veneer runs directly below the industrial CDD camera, and the photoelectric detection switch is connected with the controller. According to actual use requirements, the controller can be an existing controller, such as a microcomputer.

Preferably, the material frame is detachably fixed on the turntable

A turntable type veneer grading method, comprising the following steps:

The conveying device conveys the veneer to run, when the veneer runs directly below the industrial CCD camera, the controller controls the industrial CCD camera to take pictures to obtain the surface image of the veneer, and the industrial CCD camera uploads the acquired surface image of the veneer To the controller, the controller recognizes and calculates the number, area and perimeter of holes and scars on the surface image of the veneer, and matches the number, area and perimeter thresholds of holes and scars pre-set in the controller The quality grade is divided by comparison, and the grade information is transmitted to the motor I, which drives the turntable to make the material frame corresponding to the quality grade of the veneer correspond to the position of the conveying device; the conveying device continues to transport the veneer and run until the veneer falls into the material box that matches its quality grade. Whether the veneer board is running directly under the industrial CCD camera is judged by the photoelectric detection switch arranged on the transmission device. The transmission device and the turntable type plate dividing device are provided with inclined guide plates, and the veneer board passes through the guide conveying plate. Drop into the material box corresponding to the quality grade of the veneer.

Figure 1 shows four levels of grading, which is just one of the implementations. The present invention can be expanded according to the specific usage requirements of users, and has extremely strong expansibility and high versatility.

The technical features that are not described in the present invention can be realized by or using the existing technology, and will not be repeated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above-mentioned embodiments. Changes, modifications, additions or substitutions made by persons within the essential scope of the present invention shall also belong to the protection scope of the present invention.

Claims (10)

1. A rotary plate type veneer grading device is characterized in that: comprising a transmission device, an image recognition device is provided in the direction in which the transmission device runs, and the end of the transmission device is provided with a rotary plate type plate dividing device, the The image recognition device is connected with a turntable type plate separating device, which includes a turntable driven by the motor I to rotate, and a material frame for carrying veneers of different quality grades is arranged on the turntable. 2. The turntable type veneer grading device according to claim 1, characterized in that: the end of the transmission device is provided with an inclined guide plate, and the guide plate is arranged on the transmission device and the turntable type plate separation device. between. 3 . The turntable type veneer grading device according to claim 1 , wherein the image recognition device comprises an industrial CCD camera and a controller connected with the industrial CCD camera, and the controller is connected with the motor I. 4 . 4 . The turntable type veneer grading device according to claim 3 , wherein the industrial CCD camera is fixedly arranged on the bracket, and the industrial CCD camera is arranged directly above the conveying plane of the transmission device. 5 . 5 . The turntable type veneer grading device according to claim 1 , wherein the transmission device comprises a conveyor belt driven by a motor II, and the motor II is connected to the controller. 6 . 6. The turntable type veneer grading device according to claim 5, characterized in that: the transmission device is provided with a photoelectric detection switch for detecting whether the veneer runs directly below the industrial CDD camera, and the photoelectric detection switch is connected with the veneer. Controller connection. 7 . The turntable type veneer grading device according to claim 1 , wherein the material frame is detachably fixed on the turntable. 8 . 8. A rotary disc type veneer grading method is characterized in that: comprise the following steps: The conveying device conveys the veneer to run, when the veneer runs directly below the industrial CCD camera, the controller controls the industrial CCD camera to take pictures to obtain the surface image of the veneer, and the industrial CCD camera uploads the acquired surface image of the veneer to the controller, The controller recognizes and calculates the number, area and perimeter of holes and scars on the surface image of the veneer, and compares the number, area and perimeter thresholds of holes and scars pre-set in the controller for quality Classify and transmit the classification information to the motor I, the motor I drives the turntable so that the material frame corresponding to the quality grade of the veneer corresponds to the position of the transmission device; The conveyor continues to transport the veneers until the veneers fall into the material box corresponding to the quality class. 9. The turntable veneer grading method according to claim 8, characterized in that: whether the veneer runs directly below the industrial CCD camera is judged by a photoelectric detection switch arranged on the transmission device. 10 . The method for classifying veneer boards according to claim 8 , wherein the conveying device and the turntable plate separating device are provided with inclined guide plates, and the veneer boards fall into and are separated from each other through the guide and conveying plates. 11 . The material frame corresponding to the quality grade of the veneer.

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