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Engine label information visual detection system and method

A technology of visual inspection and label information, which is applied in the field of visual inspection, can solve problems such as low continuity of visual inspection, easy fatigue of employees, and difficulty in identification, and achieve the effects of reducing the operating rhythm of employees, improving the rate of production automation, and reducing transformation costs

Pending Publication Date: 2021-10-29
SAIC-GM-WULING AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The continuity of visual inspection is low, and employees are prone to fatigue, resulting in missed inspections and wrong inspections;
[0005] 2) Visual inspection data cannot be traced back, and quality management and analysis cannot be achieved;
[0006] 3) The position of the part label is not fixed and the text is small, making it difficult to identify

Method used

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  • Engine label information visual detection system and method
  • Engine label information visual detection system and method
  • Engine label information visual detection system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The error-proof operation process and detection process of water pump parts are as follows:

[0044] Step A: After the engine arrives at the station, the gear stop device on the track stops the engine, and RFID (radio frequency identification) identifies the engine model information;

[0045] Step B: the PLC device sends a station arrival signal to a certain holding register of the PLC device according to the arrival information of the engine;

[0046] Step C: The system software will read the value of the holding register on the PLC device in real time through the OPC communication protocol. If the value changes, it indicates that the engine has arrived, and the camera camera program is started to obtain a photo of the current engine parts

[0047] Step D: Detection process:

[0048] Step D1: Since the installation position of the engine water pump is fixed, and the position of the part identification is fixed, the upper, lower, left, and right coordinates of the iden...

Embodiment 2

[0056] The error-proof operation process and detection process of the piston assembly are as follows:

[0057] Step A: After the engine arrives at the station, the gear stop device on the track stops the engine, and RFID (radio frequency identification) identifies the engine model information;

[0058] Step B: According to the arrival information of the engine, the PLC equipment sends an arrival signal to a holding register of the PLC equipment. Different models send different signals, which can be freely defined;

[0059] Step C: the system reads the value of the register in real time through the OPC communication protocol. If the value changes, the camera program is triggered to start, and a current engine part photo is automatically obtained;

[0060] Step D: Detection process:

[0061] Step D1: There are four engine piston assemblies, and two cameras are required to take pictures, and the installation position of the engine piston assembly is fixed, and the position of th...

Embodiment 3

[0069] Figure 5 It is an engine part number visual inspection system according to an embodiment of the present invention, including an engine label 1, a camera bracket 2, an image acquisition module 3, an image processing identification module 4, an engine roller table 5 and a model information reading module (RFID) 6 .

[0070] Wherein, the image acquisition module 3 adopts an industrial camera.

[0071] Image 6 It is the software interface, the left side is the parameter setting, and the right side is the part photo display.

[0072] This scene is used to identify the part number information on the part label. The part number of the recognition result is displayed in the lower right corner, compared with the preset value, the result is correct, and the result is OK output to the PLC. The recognition results and comparison results are printed out on the software interface and saved for subsequent tracking of parts quality problems.

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Abstract

The invention provides an engine label information visual system and detection method . The system comprises a monitoring PLC signal module used for monitoring a trigger signal transmitted by a PLC; an image acquisition module which starts a camera program to acquire a current frame picture according to the trigger signal; an image processing identification module used for image preprocessing and identification to obtain a result; and a feedback module used for feeding back the result to the PLC. A visual identification model of the detection system adopts a deep learning framework, the model is obtained through collection of original data and software deep learning, key features of a label are remembered, the position of the label is automatically positioned, and part number information on the label is rapidly identified.

Description

technical field [0001] The invention belongs to the technical field of visual detection, and in particular relates to a visual detection system and method for engine label information. Background technique [0002] In the process of engine manufacturing and assembly, there are many parts and components. With the increase of engine models, there are more and more differences between each model, and it is becoming more and more difficult to prevent parts from being wrong. For example, there are many different part numbers for the fuel rail of the engine. The parts look similar, but the part label information is different. It is necessary to rely on the staff to visually check the part information on the label to prevent mistakes, and there is a large risk of mixed assembly. Moreover, this part is a calibration part, and mixed loading and dropping of parts will lead to major quality accidents. [0003] Technological process: The employee takes the fuel rail and checks the info...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G06K9/34G06K9/62
CPCG01N21/8851G01N2021/8887G06F18/214
Inventor 黄成荣凌以静陆丹阳
Owner SAIC-GM-WULING AUTOMOBILE CO LTD
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