ABSTRACT
In this paper, drawn from the practical application of topics - "The Ningbo AIU-pressure pipe system" developed. This is a pressure detection system used in the iron and steel enterprises produced the request of the closed cavity pressure on the real-time automatic pressure monitoring system. The scene by SIEMENS S7-200PLC and control of the joint control of the configuration software. PLC completed the scene of major motor control and pressure on the value of the acquisition, and so on, with effective control of a PC configuration software primarily through communication with the PLC control PLC thereby control the scene of the equipment to run automatically.
In this paper, for technical requirements, the eva luation process and a variety of detection methods, devices on a package of the design options to determine the thickness measurement devices from mechanical systems, coupled systems, measuring system and a control system. Meet high-speed, automatic detection and visual monitoring requirements, and the thickness of the image display, automatic超标alarm, automatic detection of data storage, for the function, follow the manufacture low-cost, practical principle. At the same time, pressure test on the basis of theory into a sensor choice, repetition rate, the rate of detection and resolution of the relationship between the type and use this formula to determine the sensors in the device's layout and the use of specific number. On this basis, the coupling system of testing containers, secret, closed structure, and water purification systems were studied and passed the test to improve the design of this system, this device has been used successfully in production.
The first chapter, introduced the system overall context of the second chapter, on the pipe production process, Chapter III, introduced a system of the overall plan and design overview, Chapter IV, the PLC on the preparation and procedures, the Fifth Chapter, the configuration software on the configuration screen and the preparation of Chapter VI of suppressing the practical application of Chapter VII of suppressing the development and prospects
This equiPment has been aPPlied to the Production suecessfully. ComPared to Similar technique at home and abroad,it is easy to design and make， the transfer and Receiving system of the signal is very simPle, it can be also aPPlied to the steel tube with big diameter.The eost,fault rate and the fee for maintenance is low.
Keywords: pressure testing， immersiontesting， steeltube，ultrasonie，PLC A/D Serial port communication
