CN219891105U - An online detection system for surface defects of bamboo wood flooring - Google Patents

Abstract

The utility model discloses an online detection system for surface flaws of a bamboo-wood floor, which comprises a transmission belt, a machine vision detection box body, an industrial camera and a lens, a light source system, a photoelectric sensor, a stepping motor module, a power supply module, a motor control module, a light source control module and a flaw detection module. The power supply module is respectively connected with the stepping motor module, the motor control module, the light source control module and the flaw detection module for supplying power; the motor control module is connected with the stepping motor module and the photoelectric sensor; an output shaft of the stepping motor module is connected with the transmission belt; the system provided by the utility model can realize online automatic and intelligent detection, positioning and data management of surface flaws such as holes, grooves, vertical cracks and the like of the bamboo floor. Compared with manual spot inspection of the floor by naked eyes, the utility model has great advantages in the aspects of detection integrity, detection efficiency, detection quality stability, detection standard consistency and the like, and improves the quality and efficiency of bamboo-wood floor surface flaw detection.

Description

An online detection system for surface defects of bamboo wood flooring

Technical field

The utility model relates to the field of product surface quality detection, in particular to an online detection system for bamboo and wood floor surface defects.

Background technique

The quality of bamboo and wood flooring determines a series of important parameters such as performance, lifespan, and working reliability of bamboo and wood flooring. Surface defects of bamboo flooring are an important factor affecting its quality. At present, many bamboo and wood flooring processing and production enterprises in my country still mainly rely on artificial naked eyes for sampling inspection. Manual inspection has shortcomings in terms of inspection completeness, inspection efficiency, stability of inspection quality, and consistency of inspection standards. As the processing volume of bamboo wood flooring increases, the workload of manual detection and identification of products also increases, which brings about labor costs, sensory fatigue, work efficiency, emotions, etc. that affect detection efficiency and quality, making enterprises Products are transferred to the next process and node without complete quality inspection, and even defective products are flowed to the market, resulting in certain quality costs and brand losses. Therefore, it is necessary to design an online detection system for surface defects of bamboo and wood flooring to help companies realize online automated intelligent detection, positioning and data management of surface defects such as holes, grooves and vertical cracks in bamboo and wood flooring, thereby improving product quality and reducing costs. business costs.

Utility model content

In view of this, the purpose of this utility model is to provide an online detection system for bamboo and wood floor surface defects based on automation, informationization, and machine vision technology.

In order to solve the technical problem, the technical solution adopted by this utility model is:

An online detection system for surface defects of bamboo wood flooring, including a machine vision detection box, an industrial camera and lens, a first light source, a second light source, a third light source, a fourth light source, a photoelectric sensor, a stepper motor module, and a power module. Motor control module, light source control module, transmission belt and defect detection module; the power module is connected to the stepper motor module, motor control module, light source control module and defect detection module for power supply respectively; the motor control module and the stepper motor module , Photoelectric sensor connection; the output shaft of the stepper motor module is connected to the transmission belt; the motor control module receives the detection signal of the photoelectric sensor in real time, and controls the operation of the stepper motor module based on the detection signal of the photoelectric sensor, thereby controlling the transmission of the transmission belt and being detected The floor is placed on the transmission belt; the light source control module is connected to the first light source, the second light source, the third light source, and the fourth light source, and controls the closing and opening of the first light source, the second light source, the third light source, and the fourth light source. ; The industrial camera and lens, the first light source, the second light source, the third light source, the fourth light source and the photoelectric sensor are all placed in the machine vision detection box and above the transmission belt, wherein the first light source, the second light source, The third light source and the fourth light source are respectively located in the four directions of the industrial camera and lens; the photoelectric sensor is located at the edge of the front end of the conveyor belt transmission direction in the detection range of the industrial camera; the flaw detection module is connected to the industrial camera and lens, receiving the industrial camera and The image captured by the lens is used to detect defects.

Further, it also includes a computer host and a display screen. The computer host is connected to the motor control module, industrial camera and lens, and light source control module. The defect detection module is integrated in the computer host. The display screen is used to display the detection results of the defect detection module in real time. .

Further, the computer host establishes communication with the industrial camera and lens through a USB data cable to obtain the visual image of the bamboo wood floor captured by it.

Further, it also includes the computer host performing data communication through a USB to RS module and a motor control module.

Further, the computer host performs data communication through the USB to RS module and the light source control module.

Further, the first light source, the second light source, the third light source, and the fourth light source are LED light sources and emit light at an angle of 45 degrees to the projection point of the camera on the floor to be detected.

Further, the machine vision detection box is a light-tight box.

Furthermore, it also includes a carrying platform for placing the conveyor belt.

Further, it also includes a control cabinet for placing stepper motor modules, power modules, motor control modules and light source control modules.

The beneficial effect of the utility model is that through the automation and intelligent technology of the system, the detection, positioning and data management of floor surface defects such as holes, vertical cracks, transverse grooves, and vertical grooves can be realized. Compared with the original manual visual inspection in China, it has great advantages in terms of detection completeness, detection efficiency, stability of detection quality, and consistency of detection standards, etc., which improves the detection quality and efficiency of surface defect detection of bamboo wood flooring. .

Description of the drawings

Figure 1 is a schematic diagram of the system of the present utility model.

Among them, 1 is the machine vision inspection box, 2 is the industrial camera and lens, 3 is the first light source, 4 is the second light source, 5 is the third light source, 6 is the fourth light source, 7 is the photoelectric sensor, and 8 is the stepper. Motor module, 9 is the power module, 10 is the motor control module, 11 is the light source control module, 12 is the computer host, 13 is the display screen, 14 is the control cabinet, 15 is the load-bearing platform, 16 is the transmission belt, and 17 is the floor to be tested. .

Figure 2 is the logic diagram of the online detection control program of the computer host.

Figure 3 is the control program logic diagram of the motor control module.

Figure 4 is a control program logic diagram of the light source control module.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

As shown in Figure 1, the utility model's online detection system for surface defects of bamboo wood flooring includes a machine vision detection box 1, an industrial camera and lens 2, a first light source 3, a second light source 4, and a third light source 5. The fourth light source 6, photoelectric sensor 7, stepper motor module 8, power module 9, motor control module 10, light source control module 11, transmission belt 16 and defect detection module. The power supply module 9 is connected to the stepper motor module 8, the motor control module 10, the light source control module 11, and the defect detection module for power supply respectively. The motor control module 10 is connected to the stepper motor module 8 and the photoelectric sensor 7; the output shaft of the stepper motor module 8 is connected to the transmission belt 16; the motor control module 10 receives the detection signal of the photoelectric sensor 7 in real time, and based on the photoelectric sensor 7 The detection signal controls the operation of the stepper motor module 8, thereby controlling the transmission of the conveyor belt 16, and the tested floor 17 is placed on the conveyor belt 16; the light source control module 11 and the first light source 3, the second light source 4, the third light source 5 , the fourth light source 6 is connected to control the closing and opening of the first light source 3, the second light source 4, the third light source 5, and the fourth light source 6; the industrial camera and lens 2, the first light source 3, the second light source 4, The third light source 5, the fourth light source 6 and the photoelectric sensor 7 are all placed in the machine vision detection box 1 and above the conveyor belt 16. Among them, the first light source 3, the second light source 4, the third light source 5 and the fourth light source 6 are respectively located at the four directions of the industrial camera and lens 2; the photoelectric sensor 7 is located at the edge of the front end of the transmission direction of the conveyor belt 16 in the detection range of the industrial camera (right side in the picture), so that it can accurately detect whether the floor 17 to be detected is in Within the detection range of industrial cameras. The defect detection module is connected to the industrial camera and lens 2, receives the images acquired by the industrial camera and lens 2, and performs defect detection.

Preferably, it also includes a computer host 12 and a display screen 13. The computer host 12 performs data communication with the motor control module 10 through a USB to RS485 module. The motor control module 10 controls the stepper motor according to the photoelectric sensor 7 signal and the computer host 12 communication instructions. Module 8 starts and stops the conveyor belt 16 . The computer host 12 establishes communication with the industrial camera and lens 2 through a USB data cable to obtain the visual image of the bamboo wood floor captured by it. Preferably, the industrial camera model in the industrial camera and lens 2 is JHSM300s, which is arranged directly above the floor 17 to be inspected. The computer host 12 performs data communication with the light source control module 11 through a USB to RS485 module. The light source control module 11 controls the closing of the first light source 3, the second light source 4, the third light source 5, and the fourth light source 6 according to the communication instructions of the computer host 12. and turn on. The first light source 3, the second light source 4, the third light source 5, and the fourth light source 6 are LED light sources and emit light at a 45-degree angle to the projection point of the camera on the floor 17 to be detected, and are arranged in the floor transmission direction. A light source 3 and a third light source 5 are arranged in the vertical direction of the floor transmission direction, and the second light source 4 and the fourth light source 6 are arranged. At this time, the photoelectric sensor 7 is located at the edge of the third light source 5 in the detection range of the industrial camera. The machine vision detection box 1 is a light-tight box and contains an industrial camera and lens 2, a first light source 3, a second light source 4, a third light source 5, a fourth light source 6 and a photoelectric sensor 7 to ensure that the industrial The camera and lens 2 can eliminate ambient light interference when taking pictures and obtain accurate images. The defect detection module is integrated in the computer host 12, and the display screen 13 is used to display the detection results of the defect detection module in real time.

When the practical online detection system for bamboo and wood floor surface defects is working, workers place the floor 17 to be detected on the conveyor belt 16, and the computer host 12 sends a start detection command to the motor control module 10, and the motor control module 10 drives the stepper motor module 8. Control the conveyor belt 16 to forward the inspected floor 17 to a designated position. The computer host 12 controls the light source control module 11 and the industrial camera and lens 2 to obtain digital images, and uses the defect detection module to intelligently identify and locate floor defects. The logic diagram of the online detection control program of the computer host 12 is shown in Figure 2. When the detection is started, the computer sends an instruction to the motor control module 10 to start detection, and waits for the motor control module 10 to feedback the floor conveying completion signal. If the detected floor 17 is transported to the designated position, the computer host sends an instruction to the light source control module 11 to turn on the light source in a regular and sequential manner. After the instruction is issued, after a delay of t1 seconds, the industrial camera is controlled to collect image 1. After a delay of t2 seconds, control the industrial camera to collect image 2. After a delay of t2 seconds, control the industrial camera to collect image 3. After a delay of t2 seconds, control the industrial camera to collect image 4. Among them, t1 represents the reaction time from when the computer host sends an instruction to the light source control module 11 to turn on the light source until the first light source is turned on, and t2 represents the delay time from turning off the light source and turning on the next light source. The computer host 12 inputs the acquired images to the defect detection module for detection. The defect detection module applies photometric stereoscopic technology using the four collected images to obtain a surface gradient image. The Gaussian curvature image is then obtained through the surface gradient image. Locate and mark defective points based on the Gaussian curvature image, determine the quality level, and save relevant inspection data to the database. After completion, the computer host 12 sends an instruction to the motor control module 10 to control the conveyor belt 16 to continue conveying, and continuously detects it in real time. The control program logic diagram of the motor control module 10 is shown in Figure 3. When the motor control module 10 receives the computer instruction to start detection, it drives the stepper motor module 8 to control the conveyor belt 16 to move forward. At this time, the inspected floor 17 on the conveyor belt 16 also moves forward. The photoelectric sensor 7 detects in real time to determine whether the detected floor 17 reaches the detection range of the industrial camera. The motor control module 10 continuously receives the signal from the photoelectric sensor 7. If the photoelectric sensor 7 detects the detected floor 17, it drives the stepper motor module 8 to control The conveyor belt 16 stops conveying and feeds back to the computer host 12 that the conveying is completed. The computer host 12 controls other modules to complete the defect detection; when the detection is completed, the computer host 12 issues a continue conveying instruction, the motor control module 10 receives the computer host 2 to continue conveying instructions, and drives the stepper motor module 8 to control the conveyor belt 16 to be inspected on the floor 17 After conveying n distance forward, the conveying stops, and the next area to be inspected of the floor 17 to be inspected is conveyed to the inspection range and fed back to the computer host 2. n represents the maximum length of the camera in one shot in the conveying direction. Until the photoelectric sensor 7 cannot detect the floor 17 to be detected, it indicates that the detection of a floor product has been completed, and the stepper motor module 8 is driven to control the conveyor belt 16 to transport forward, and the next floor is transported to the position of the photoelectric sensor 7 and then starts to drop. Inspection of a floor. The control program logic diagram of the light source control module 12 is shown in Figure 4 . When the light source control module 12 receives the computer instruction to turn on the light source, it turns on the first light source and delays for t2 seconds. Then turn off the first light source, turn on the second light source and delay t for 2 seconds. Then turn off the second light source, turn on the third light source and delay t for 2 seconds. Then turn off the third light source, turn on the fourth light source and delay t for 2 seconds. Then turn off the fourth light source. Then wait for the computer host to turn on the light source command again and run the next cycle. Among them, the settings of t1 and t2 should ensure that the corresponding light source is on when the industrial camera collects images.

The utility model can realize online defect detection, positioning and data management of bamboo and wood flooring. Through the automation and intelligent technology of this system, the detection, positioning and data management of floor surface defects such as holes, vertical cracks, horizontal grooves, and vertical grooves can be realized. Compared with the original manual visual inspection in China, it has great advantages in terms of detection completeness, detection efficiency, stability of detection quality, and consistency of detection standards, etc., which improves the detection quality and efficiency of surface defect detection of bamboo wood flooring. .

Obviously, the above-mentioned embodiments are only examples for clear explanation and are not intended to limit the implementation. For those of ordinary skill in the art, other different forms of changes or changes can be made based on the above description. It is not necessary and impossible to exhaustively enumerate all implementations here. However, obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims (9)

1. An online detection system for surface defects of bamboo wood flooring, which is characterized in that it includes a machine vision detection box (1), an industrial camera and lens (2), a first light source (3), a second light source (4), and a Three light sources (5), fourth light source (6), photoelectric sensor (7), stepper motor module (8), power supply module (9), motor control module (10), light source control module (11), transmission belt ( 16) and the defect detection module; the power module (9) is connected to the stepper motor module (8), the motor control module (10), the light source control module (11) and the defect detection module to supply power respectively; the motor control module ( 10) Connect with the stepper motor module (8) and the photoelectric sensor (7); the output shaft of the stepper motor module (8) is connected with the transmission belt (16); the light source control module (11) and the first light source (3 ), the second light source (4), the third light source (5), and the fourth light source (6) are connected to control the first light source (3), the second light source (4), the third light source (5), and the fourth light source ( 6) closing and opening; the industrial camera and lens (2), first light source (3), second light source (4), third light source (5), fourth light source (6), photoelectric sensor (7) They are all placed in the machine vision inspection box (1) and above the conveyor belt (16). Among them, the first light source (3), the second light source (4), the third light source (5), and the fourth light source (6) They are respectively located at four directions of the industrial camera and lens (2); the defect detection module is connected to the industrial camera and lens (2), receives the images acquired by the industrial camera and lens (2) and performs defect detection. 2. The bamboo floor surface defect online detection system according to claim 1, characterized in that it also includes a computer host (12) and a display screen (13), wherein the computer host (12) and the motor control module (10), The industrial camera is connected to the lens (2) and the light source control module (11). The defect detection module is integrated in the computer host (12). The display screen (13) is used to display the detection results of the defect detection module in real time. 3. The online detection system for bamboo and wood floor surface defects according to claim 2, characterized in that the computer host (12) establishes communication with the industrial camera and lens (2) through a USB data cable to obtain the bamboo wood photographed by it. Floor visual image. 4. The bamboo and wood floor surface defect online detection system according to claim 2, characterized in that it also includes the computer host (12) performing data communication through a USB to RS485 module and a motor control module (10). 5. The bamboo and wood floor surface defect online detection system according to claim 2, characterized in that the computer host (12) performs data communication through a USB to RS485 module and a light source control module (11). 6. The online detection system for surface defects of bamboo wood flooring according to claim 1, characterized in that the first light source (3), the second light source (4), the third light source (5) and the fourth light source (6) are The LED light source emits light at a 45-degree angle to the camera's projection point on the floor (17) to be inspected. 7. The online detection system for surface defects of bamboo wood flooring according to claim 1, characterized in that the machine vision detection box (1) is an opaque box. 8. The online detection system for surface defects of bamboo wood flooring according to claim 1, characterized in that it also includes a bearing platform (15) for placing the transmission belt (16). 9. The bamboo floor surface defect online detection system according to claim 1, characterized in that it also includes a stepper motor module (8), a power module (9), a motor control module (10) and a light source. Control cabinet (14) for control module (11).