Visual mistake proofing method for positioning pin of built-in wire tray

Abstract

The invention provides an in-line tray positioning pin visual mistake proofing method, which relates to the technical field of tray positioning pins, and comprises the following steps: step 1, putting a tray into a station for adjusting the tray positioning pin by a worker; 2, selecting a model template according to the information received by the photographing visual error-proofing system, and then manually adjusting a tray positioning pin; step 3, the photographing visual error-proofing system carries out automatic photographing; step 4, automatically photographing and comparing by the photographing visual error-proofing system; and step 5, a lamp is turned on for releasing if comparison is qualified, and an alarm lamp is turned on for manual processing if disqualification. The tray positioning pins are monitored and recognized in real time through the photographing visual mistake proofing system, the assembling accuracy is greatly improved, positioning errors caused by manual misoperation or equipment faults can be effectively prevented, the error rate is reduced, manual intervention is reduced in the automatic detection and recognition process, and the production efficiency is improved. And the production efficiency is improved, high stability and reliability are achieved, and long-term stable operation can be guaranteed.

Description

Technical Field

[0001] The present application relates to the field of pallet locating pins, and more specifically, to a visual error prevention method for locating pins of an internally installed pallet. Background Art

[0002] The main line pallet of the engine assembly line is a precision positioning pallet, and its accuracy mainly depends on the relative position of the positioning pin and the positioning block (the positioning pin is used to determine the engine position (different models use different positioning pins), and the bolt is used to lock the engine. When in the working position, the positioning mechanism first holds the positioning block tightly, fixes the engine position, and then performs assembly operations). There are a large number of pallets on the assembly line. The only way to determine whether the pallet accuracy meets the requirements is to use three-coordinate equipment to detect the position of the positioning pin. This method not only has a long cycle and high labor intensity (the total weight of the pallet is about 300kg, and it needs to be sent to the three-coordinate room for measurement), but also increases manufacturing costs.

[0003] However, existing pallet positioning pins cannot be detected and identified at the same time, and manual positioning leads to equipment failure or positioning errors, thereby reducing assembly accuracy and further reducing production efficiency. Summary of the invention

[0004] In order to overcome the existing deficiencies, an embodiment of the present application provides a visual error-proofing method for positioning pins of an internal assembly line pallet, which can solve the problem that the above-mentioned manual positioning leads to equipment failure or positioning errors, thereby reducing the accuracy of assembly and further reducing production efficiency.

[0005] The technical solution adopted by the embodiment of the present application to solve the technical problem is: a visual error-proofing method for positioning pins of an internally installed line tray, comprising the following steps:

[0006] Step 1: Place the pallet into the position where the worker adjusts the pallet positioning pins;

[0007] Step 2: Select the model template according to the information received by the camera vision error prevention system, and then manually adjust the tray positioning pin;

[0008] Step 3: The camera visual error-proofing system automatically takes photos;

[0009] Step 4: The camera visual error-proofing system automatically takes photos for comparison;

[0010] Step 5: If the qualified light is on, the vehicle will be released; if the unqualified light is on, manual processing will be carried out.

[0011] In a specific implementation scheme, in step 2, the camera vision error prevention system includes a vision system deployment unit, an image processing and recognition unit, a locating pin status monitoring unit, an error prevention logic judgment unit and a feedback and adjustment unit. The vision system deployment unit can capture and recognize the image of the pallet locating pin, the image processing and recognition unit calculates the picture of the pallet locating pin collected by the vision system deployment unit, the locating pin status monitoring unit can perform real-time detection of the insertion status of the pallet locating pin, the error prevention logic judgment unit determines whether the pallet locating pin is qualified according to the results of the vision system deployment unit and the image processing and recognition unit, and the feedback and adjustment unit can feed back the generated detection data to the production line management and control system.

[0012] In a specific implementation scheme, the vision system deployment unit includes a high-precision vision sensor having high resolution and fast processing capabilities to capture images of the pallet and its locating pins in real time, and can easily and accurately identify the shape, size and position of the pallet locating pins.

[0013] In a specific implementation scheme, the image processing and recognition unit includes a picture processing module and a calculation module. The picture processing module can pre-process the image data captured by the visual sensor, including denoising and contrast enhancement, to improve image quality. The calculation module can use the image recognition algorithm to identify the pallet locating pins after the processed image and determine their position, direction and status.

[0014] In a specific implementation scheme, the error-proofing logic judgment unit determines whether the pallet and its locating pins meet the predetermined assembly requirements based on the calculation result identification results of the calculation module. If abnormal conditions are found, such as the locating pins are in the wrong position, missing, or the workpiece type on the pallet does not match, the assembly process is stopped immediately and an error prompt is issued.

[0015] In a specific implementation scheme, the positioning pin status monitoring can monitor the insertion status of the pallet positioning pin in real time to determine whether the positioning pin is correctly inserted into the positioning hole of the pallet. If the positioning pin is detected to be loose, deformed or damaged, an alarm can be issued in time.

[0016] In a specific implementation scheme, the feedback and adjustment unit can feed back the judgment structure of the calculation module and the error-proofing logic judgment unit to the production line management and control system, and make necessary adjustments or modifications to the pallet locating pins according to the instructions of the production line management and control system to ensure the smooth progress of the subsequent assembly process and ensure the security of the collected and processed data to prevent data leakage or malicious tampering.

[0017] In a specific implementation, the image processing module and the calculation module may be an image acquisition card and an image processor, which are used to receive image data from a visual sensor and have high-performance computing capabilities and stable operating performance.

[0018] In a specific implementation scheme, the camera-based visual error-proofing system can successfully read the engine information in the pallet RFID, and select the corresponding model template for comparison based on the read engine number. The camera-based visual error-proofing system integrates the functions of the physical buttons on the edge of the line into the display, and the operator can effectively control it through the mouse and keyboard.

[0019] In a specific implementation scheme, in step 2, the camera visual error prevention system also includes an alarm and display device. When an abnormal situation such as the positioning pin being in the wrong position, missing, or the workpiece type on the pallet not matching is detected, an alarm needs to be issued and an error message displayed.

[0020] The advantages of the embodiments of the present application are:

[0021] The camera-based visual error-proofing system monitors and identifies the pallet locating pins in real time, greatly improving the accuracy of assembly and effectively preventing positioning errors caused by improper manual operation or equipment failure, thereby reducing the error rate. The automated detection and identification process reduces manual intervention, improves production efficiency, and has a high degree of stability and reliability, which can ensure long-term stable operation. This method combines visual recognition technology and mechanical locating pins, and uses a visual system to monitor and identify the pallet locating pins in real time to ensure that the pallet and the workpiece on it can be correctly and accurately placed in the specified position. At the same time, this method can also effectively prevent positioning errors caused by improper manual operation or equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the posture of the pallet positioning pin 6A / 6J provided in the embodiment of the present application;

[0023] Figure 2 A schematic diagram of the posture of the tray positioning pin 6L provided in the embodiment of the present application;

[0024] Figure 3 A schematic diagram of the posture of the pallet positioning pin 6MK provided in the embodiment of the present application;

[0025] Figure 4 A schematic diagram of the posture of the pallet positioning pin elastic connection assembly K08 provided in an embodiment of the present application;

[0026] Figure 5 This is a schematic diagram of the posture of the pallet locating pins K09 / K11 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solution in the embodiment of the present application is to solve the problem that the above-mentioned manual positioning leads to equipment failure or positioning error, thereby reducing the accuracy of assembly and further reducing production efficiency. The overall idea is as follows:

[0028] See also Figure 1-Figure 5 , a visual error-proofing method for positioning pins of an internal assembly line pallet, comprising the following steps:

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Step 1: Put the pallet into the position where the worker adjusts the pallet positioning pin; Step 2: Select the machine model template according to the information received by the photo visual error prevention system, and then manually adjust the pallet positioning pin; Step 3: The photo visual error prevention system automatically takes pictures; Specifically, after the manual adjustment of the pallet positioning pin is completed according to the needs, a signal is given to the photo error prevention system, and the system automatically recognizes and makes a judgment. After the machine foot is installed manually, two trigger information, voice control and button, are used to give the photo visual error prevention system for photo judgment. Step 4: The photo visual error prevention system automatically takes pictures for comparison; Step 5: After the comparison, the qualified light is on and released, the qualified light is green, and the unqualified alarm light is on for manual processing, and the unqualified light is red. The pallet positioning pin is divided into 5 postures, namely 6A / 6J, 6L, 6MK, K08, K09 / K11. Among them, this visual error prevention method for the positioning pin of the internal assembly line requires technical support such as image processing technology, machine learning and artificial intelligence, sensor fusion technology and industrial automation technology, as well as hardware support such as high-precision visual sensors, image acquisition and processing equipment, positioning and guiding devices, alarm and display devices and network communication equipment. The synergy of these technologies and hardware can ensure the accuracy and reliability of the system, thereby improving production efficiency and product quality. The real-time monitoring and identification of the pallet positioning pins by the camera vision error-proofing system greatly improves the accuracy of assembly and can effectively prevent positioning errors caused by improper manual operation or equipment failure, thereby reducing the error rate. The automated detection and identification process reduces manual intervention, improves production efficiency, and has a high degree of stability and reliability, which can ensure long-term stable operation.

[0030] In step 2, the camera vision error prevention system includes a vision system deployment unit, an image processing and recognition unit, a positioning pin state monitoring unit, an error prevention logic judgment unit, and a feedback and adjustment unit. The vision system deployment unit can capture and recognize the image of the pallet positioning pin, the image processing and recognition unit calculates the image of the pallet positioning pin collected by the vision system deployment unit, the positioning pin state monitoring unit can detect the insertion of the pallet positioning pin in real time, the error prevention logic judgment unit judges whether the pallet positioning pin is qualified according to the results of the visual system deployment unit and the image processing and recognition unit, and the feedback and adjustment unit can feed back the generated detection data to the production line management and control system. The vision system deployment unit includes a high-precision visual sensor. Specifically, because there is a KPK light rail crane running directly above the pallet, the high-precision visual sensor can only be arranged obliquely above the four corner edges of the pallet, about 400mm away from the edge of the pallet and about 2000mm high. The installed high-precision sensor must fully consider the interference and clear shooting functions. In order to avoid affecting the normal production use of the camera vision error prevention system, the station operation cannot use active light sources. The visual sensor has high resolution and fast processing capabilities to capture images of the pallet and its locating pins in real time, and can easily and accurately identify the shape, size and position of the pallet locating pins. The image processing and recognition unit includes an image processing module and an algorithm module. The image processing module can pre-process the image data captured by the visual sensor, including denoising and contrast enhancement to improve image quality. The algorithm module can use the image recognition algorithm to identify the pallet locating pins after processing and determine their position, direction and status. By training the machine learning model, the visual system can more accurately identify the pallet locating pins and their status. The artificial intelligence algorithm can also optimize the image processing and recognition process to improve the real-time performance and accuracy of the system.

[0031] The error-proofing logic judgment unit determines whether the pallet and its locating pins meet the predetermined assembly requirements based on the calculation result recognition result of the calculation module. If the locating pin position is wrong, missing, or the workpiece type on the pallet does not match, the assembly process is stopped immediately and an error prompt is issued. The locating pin status monitoring can monitor the insertion of the pallet locating pin in real time to determine whether the locating pin is correctly inserted into the locating hole of the pallet. If the locating pin is detected to be loose, deformed or damaged, an alarm can be issued in time. The feedback and adjustment unit can feed back the judgment structure of the calculation module and the error-proofing logic judgment unit to the production line management and control system. According to the instructions of the production line management and control system, the pallet locating pin is adjusted or modified as necessary to ensure the smooth progress of the subsequent assembly process and ensure the security of the collected and processed data to prevent data leakage or malicious tampering. The image processing module and the calculation module can be an image acquisition card and an image processor for receiving image data from a visual sensor, and have high-performance computing power and stable operating performance. In step 2, the camera visual error-proofing system also includes an alarm and a display device. When an abnormal situation such as the locating pin position is wrong, missing, or the workpiece type on the pallet does not match is detected, an alarm needs to be issued and an error message is displayed. The camera-based visual error-proofing system can successfully read the engine information in the pallet RFID, and select the corresponding model template for comparison based on the read engine number. The camera-based visual error-proofing system integrates the functions of the physical buttons on the line side into the display, and the operator can effectively control it through the mouse and keyboard.

[0032] When using this application:

[0033] This visual error-proofing method for pallet locating pins in internal assembly lines requires technical support such as image processing technology, machine learning and artificial intelligence, sensor fusion technology, and industrial automation technology, as well as hardware support such as high-precision visual sensors, image acquisition and processing equipment, positioning and guiding devices, alarm and display devices, and network communication equipment. The collaborative work of these technologies and hardware can ensure the accuracy and reliability of the system, thereby improving production efficiency and product quality. The real-time monitoring and identification of pallet locating pins by the camera visual error-proofing system greatly improves the accuracy of assembly, and can effectively prevent positioning errors caused by improper manual operation or equipment failure, thereby reducing the error rate. The automated detection and identification process reduces manual intervention, improves production efficiency, and has a high degree of stability and reliability, which can ensure long-term stable operation.

[0034] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A visual error-proofing method for positioning pins of internal assembly line pallets, characterized in that: The following steps are involved: Step 1: Place the pallet into the position where the worker adjusts the pallet positioning pins; Step 2: Select the model template according to the information received by the camera vision error prevention system, and then manually adjust the tray positioning pin; Step 3: The camera visual error-proofing system automatically takes photos; Step 4: The camera visual error-proofing system automatically takes photos for comparison; Step 5: If the qualified light is on, the vehicle will be released; if the unqualified light is on, manual processing will be carried out.

2. The visual error-proofing method for positioning pins of internal line trays according to claim 1, characterized in that: In step 2, the photo-taking visual error prevention system includes a visual system deployment unit, an image processing and recognition unit, a locating pin state monitoring unit, an error prevention logic judgment unit and a feedback and adjustment unit. The visual system deployment unit can capture and recognize the image of the pallet locating pin, the image processing and recognition unit calculates the image of the pallet locating pin collected by the visual system deployment unit, the locating pin state monitoring unit can perform real-time detection of the insertion status of the pallet locating pin, the error prevention logic judgment unit determines whether the pallet locating pin is qualified according to the results of the visual system deployment unit and the image processing and recognition unit, and the feedback and adjustment unit can feed back the generated detection data to the production line management and control system.

3. The visual error-proofing method for positioning pins of internal line trays according to claim 2, characterized in that: The visual system deployment unit includes a high-precision visual sensor with high resolution and fast processing capabilities to capture images of the pallet and its locating pins in real time, and can accurately identify the shape, size and position of the pallet locating pins.

4. The visual error-proofing method for positioning pins of internal line trays according to claim 3, characterized in that: The image processing and recognition unit includes a picture processing module and an operation module. The picture processing module can pre-process the image data captured by the visual sensor, including denoising and contrast enhancement, to improve the image quality. The operation module can use the image recognition algorithm to identify the pallet locating pins after the processed image and determine their position, direction and status.

5. The visual error-proofing method for positioning pins of internal line trays according to claim 4, characterized in that: The error-proofing logic judgment unit determines whether the pallet and its locating pins meet the predetermined assembly requirements based on the calculation results of the calculation module. If any abnormal conditions are found, such as the locating pins are in the wrong position, missing, or the workpiece type on the pallet does not match, the assembly process is stopped immediately and an error prompt is issued.

6. The visual error-proofing method for positioning pins of internal line trays according to claim 2, characterized in that: The positioning pin status monitoring can monitor the insertion status of the pallet positioning pin in real time to ensure that the positioning pin is correctly inserted into the positioning hole of the pallet. If the positioning pin is detected to be loose, deformed or damaged, an alarm can be issued in time.

7. The visual error-proofing method for positioning pins of internal line trays according to claim 5, characterized in that: The feedback and adjustment unit can feed back the judgment structure of the calculation module and the error-proofing logic judgment unit to the production line management and control system, and make necessary adjustments or modifications to the pallet locating pins according to the instructions of the production line management and control system to ensure the smooth progress of the subsequent assembly process and ensure the security of the collected and processed data to prevent data leakage or malicious tampering.

8. The visual error-proofing method for positioning pins of internal line trays according to claim 4, characterized in that: The image processing module and the calculation module can be an image acquisition card and an image processor, which are used to receive image data from visual sensors and have high-performance computing capabilities and stable operating performance.

9. The visual error-proofing method for positioning pins of internal line trays according to claim 1, characterized in that: In step 2, the camera vision error prevention system also includes an alarm and display device. When an abnormal situation such as the positioning pin is in the wrong position, missing, or the workpiece type on the pallet does not match is detected, an alarm needs to be issued and an error message displayed.

10. The visual error-proofing method for positioning pins of internal line trays according to claim 1, characterized in that: The camera-based visual error-proofing system can successfully read the engine information in the pallet RFID, and select the corresponding model template for comparison based on the read engine number. The camera-based visual error-proofing system integrates the functions of the physical buttons on the line side into the display, and the operator can effectively control it through the mouse and keyboard.

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