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Machine vision equipment communication verification method based on PLC serial communication

A machine vision, communication verification technology, applied in the direction of instruments, general control systems, electrical testing/monitoring, etc.

Inactive Publication Date: 2018-06-22
TIANJIN PUDA SOFTWARE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following problems technically: 1. The computer sends the detection result signal delay problem and the signal loss problem
3. There is a difference in the number of signals sent by the PLC counting and detection software
Once the above three situations occur, when the PLC should perform the elimination action, it does not receive the bad signal sent by the computer and cannot be eliminated normally, resulting in false detection and missed detection during the operation of the detection equipment.
In the normal production process, it will bring hidden dangers to product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The following describes the detection software on the PC side, the coding rules on the PLC side, and the communication rules between the PC and PLC.

[0014] PC detection software:

[0015] Each picture acquired by the camera is numbered, and the number is cycled from 0 to 64. When the detection software starts to detect, the number is forced to be 0, and then every time a picture is collected, the picture number is increased by 1; after the number reaches 64, download A picture number starts from 0 again, and it goes round and round. Each numbered picture can be detected in different detection threads. After the detection of each detection thread is completed, the detection results of each picture are encoded according to the following rules: the first two digits are the picture number, and the last two digits For the test results, good products are 01 and defective products are 02. For example, if the No. 13 picture is detected as unqualified, its encoding is 1302. ...

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PUM

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Abstract

The invention relates to a machine vision equipment communication verification method based on PLC serial communication. The method includes the following aspects: 1) a PC side which performs cyclic numbering on each picture of an object to be detected which is obtained by a camera, encodes a detection result of each picture and the encoded detection results are pressed into a detection result stack from a rear end according to a time sequence, a detection result sending thread being developed; and 2) a PLC side which performs cyclic numbering on each photographing signal, and establishes a removal moment stack.

Description

technical field [0001] The invention relates to a diagnosis method for detecting abnormal operation of equipment. Background technique [0002] At present, more and more manufacturers use computer-based and PLC-based machine vision inspection equipment to inspect the quality of products on industrial production lines. The PC in this type of inspection equipment is equipped with machine vision inspection software, which is responsible for analyzing the product pictures captured by the camera and judging whether it is a defective product; the PLC in the equipment is mainly responsible for triggering the camera to take pictures when the product passes through and controlling the removal of defective products The organization sorts qualified products and non-conforming products. [0003] In general industrial sites, after the detection software on the PC side detects a defective product, it will send a level line number output to the PLC through the IO card, or send the defined...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0213G05B2219/24065
Inventor 余天洪亢君于振
Owner TIANJIN PUDA SOFTWARE TECH
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