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What is the working process of visual system?

Author:Shenzhen Xingyuan Intelligent Equipment Co., Ltd. Click: Time:2020-10-13 09:31:16

The main working process of a complete machine vision system is as follows:

1. The workpiece positioning detector detects that the object has moved to the center of view close to the camera system, and sends a trigger pulse to the image acquisition part.

2. The image acquisition part sends the start pulse to the camera and lighting system respectively according to the preset program and time delay.

3. The camera stops the current scanning and starts a new frame scanning, or the camera is in a waiting state before the start pulse comes, and starts a frame scanning after the starting pulse arrives.

4. The exposure mechanism is turned on before the camera starts a new frame scanning, and the exposure time can be set in advance.

5. Another start pulse turns on the light, and the light on time should match the exposure time of the camera.

6. After the camera is exposed, the scanning and output of a frame of image is officially started.

7. The image acquisition part receives analog video signal and digitizes it through a / D, or directly receives digital video data after camera digitization.

8. The image acquisition part stores the digital image in the memory of processor or computer.

9. The processor processes, analyzes and identifies the image to obtain the measurement results or logic control values.

10. The processing result controls the movement of the pipeline, carries on the localization, corrects the movement error and so on.

From the above workflow, we can see that machine vision is a more complex system. Because most of the objects monitored by the system are moving objects, the matching and coordinating action between the system and the moving objects is particularly important, so it brings strict requirements to the action time and processing speed of each part of the system. In some application fields, such as robot and flying object guidance, there are strict requirements for the weight, volume and power consumption of the whole system or part of the system.


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