Embedded vision measurement and control system based on Ethernet and measurement and control method of embedded vision measurement and control system

Abstract

The invention discloses an embedded vision measurement and control system based on an Ethernet. The embedded vision measurement and control system comprises an image acquisition unit, a data complement unit, an image processing unit, an information storage unit, a man-machine interface unit, a control unit and an actuator. The problem of random packet loss in networks during Ethernet transmission is taken into consideration sufficiently, the embedded vision measurement and control system aims to reduce influences of packet loss during image data transmission, optimize a control strategy and the like, relative stability is realized instead of traditional whole-journey asymptotic stability to meet the requirement on control of a target, so that a measurement and control process is smoother, and a measurement and control result is more accurate. Besides, the invention further discloses a measurement and control method of the measurement and control system. The embedded vision measurement and control system and the measurement and control method have the advantages that influences of packet loss to stability of a closed-loop system can be effectively reduced, robustness of a network control system is improved, and design conservative property of a controller is reduced.

Description

technical field [0001] The invention belongs to the technical field of measurement and control, and in particular relates to an Ethernet-based embedded visual measurement and control system and a measurement and control method thereof. Background technique [0002] In the detection technology, the shape of the object to be measured often has a certain geometric shape, and its length, angle, hole diameter, radian, etc. are typical geometric parameters to be measured. The traditional measurement method is to use calipers or micrometers on the measured workpiece The average value is obtained after multiple measurements of a certain parameter, but this measurement method has low precision and slow test speed, and the data cannot be processed in real time, so the controller cannot make control decisions in real time based on this, so it is not suitable for automated production . [0003] The dimensional measurement method based on machine vision can effectively solve these probl...

AI Technical Summary

Problems solved by technology

[0005] However, because the Ethernet does not have the specificity of other industrial networks, and in order to ensure the speed of data transmission, the data transmission in the application is mostly based on the UDP protocol, which leads to a large number of network packet loss in the data transmission.

Due to the existence of packet loss, the use of traditional control methods may lead to invalid control instructions at certain moments, not only failing to control and adjust, but may cause adverse effects

[0006] At the same time, the existing machine vision measurement devices and control devices are often based on PCs. These devices are often expensive and bulky, which not only increases the cost, but also loses a lot of flexibility

Images