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The system is developed with Visual, so that the program structure is clear, each module completes an independent function, which is convenient for system function expansion and maintenance. According to the design requirements of the gear visual inspection system, it mainly includes initialization module, image acquisition module, image processing module, motion control module, output and related auxiliary function modules; the block diagram of the software system is shown in Figure 3. The image acquisition module adopts the basic program provided by the image acquisition card manufacturer and develops it on the basis of the parameters. It is divided into parameter settings (image parameters, input parameters, channel selection, board selection, etc.), image acquisition, graph Function sub-modules like display and storage.
Figure 3 Block diagram of the software system module The image processing module processes or post-processes the acquired image in real time. Its processing power and speed are an important indicator of the gear visual inspection system, including a complete image processing solution. In addition to the functions of inputting, outputting and saving images, it can also realize other processing functions of images, such as image, operation, transformation, enhancement, edge and contour, analysis and restoration. The motion control module uses Advantech's PCL-839 three-axis stepper motor 1 control card to realize the control of the stepper motor through the driver, so that the gears of the mechanical motion unit can automatically convey and classify the detected gears with a certain beat. 4 is an example of a basic setting interface of a motion control unit embedded with a master program by a VC system.
Figure 4: Basic setting of motion control module 5 Conclusion Using machine vision recognition system instead of manual gear quality inspection, it has practical value. This paper has carried on the preliminary discussion and attempts. The next step is to solve the problem. Processing, the second is to detect and identify other defects of the gears except the defects of the table, and how to use the system to detect other mechanical parts; but in any case, the overall design of the system is feasible, overcoming The professional gear manufacturer generally adopts the problem of poor precision and low efficiency caused by the measurement of the comprehensive measuring instrument. It has broad application prospects. The PLC control system has 16 inputs and 13 outputs, and its I/O distribution. As shown in Table 1 and Table 2. Table 1 PLC input port defines the port signal name port; signal name X0 lateral stroke switch end point X8 lateral; fine adjustment to the right X1 longitudinal stroke switch end point X9 start X2 lateral; stroke switch zero XA self-test X3 longitudinal stroke; switch zero XB return to zero X4 point Move XC; pause/continue X5 to fine-tune the XD punch position detection vertically.
Dental visual inspection program preset