Design of Computer Control System of Mobile Asphalt Concrete Mixer

2012 ◽  
Vol 182-183 ◽  
pp. 1174-1178
Author(s):  
Xian Wu Gong ◽  
Gui Ping Wang

In order to achieve the application requirements of a mobile asphalt concrete mixer, a distributed computer control system of the mixer is developed with an industrial control computer and a S7-200 PLC. Through analyzing the operation principle of mixer, main functions and specifications of the system are proposed. In this paper, the hardware constitution and the software design method of the system are introduced in detail, and the working process of the asphalt concrete mixer can be controlled automatically and intelligently in real time. Moreover, the functions of batching control, process monitoring and data management has been realized. Test results show that the asphalt concrete mixer works stably and reliability.

2012 ◽  
Vol 500 ◽  
pp. 506-510
Author(s):  
Liang Zhou ◽  
Yan Tao Fang ◽  
Gang Cao ◽  
Bo Zhu

The reconfigurable flexible process-equipment developed for machining complex shape and size changes in the scope of large thin-walled parts usually consists of dozens or even hundreds of positioning/support units. During the control process, each unit communicates with the host computer to get control commands and simultaneously feedback internal state information. For large complex system composed of many subsystems, the traditional cable connection based on field bus technology is high control costs and the complexity of the control circuit is hard to build and manage. To solve this problem, this paper puts forward a new way of wireless communication with the cable network technology and drive positioning/support unit in order. This paper focuses on the overall structure of the proposed system, host computer control system, lower computer control system and wireless communication module as well as the implementation hardware circuits and software algorithm. In addition, some solutions of related issues are discussed. The research shows that the proposed system has high stability and reliability, and it provides an effective way to the control and communication of complex system which fully meets the requirements of reconfigurable flexible process-equipment.


2014 ◽  
Vol 910 ◽  
pp. 433-436
Author(s):  
Jiao Yue Liu ◽  
Ji Chang Wang ◽  
Ya Bei Shi ◽  
Ju Qing Yang

In view of current production technology of asphalt concrete mixing plant and technology, a distributed computer control system based on PLC and field bus is developed. The compensation iteration self-learning algorithm is adopted, the compensation amount of learning algorithm of the system is designed and the course program control algorithm is presented. Therefore the precision of the system’s measurement and control is improved and the transmission error is reduced.


Author(s):  
Xiaobei Wang

Objective: The cotton textile industry, as a competitive industry in China's international competition, is confronting new opportunities and challenges brought by the growing process of mechatronics. To further improve the traditional drive control of combing machines made in China and the automatic level of machines as a whole, some of our cotton textile enterprises have undertaken necessary technical transformations on the combing machines so as to raise the operational efficiency and production technology of domestic textile equipments. Methods: This paper focuses on the basic status and dynamic characteristics of the drive part of the domestic new comber, and analyzes the operation process of the comber and the prominent problems from the production practice. Results: The technically improved drive control system uses an industrial control computer (IPC) as the core of the system, which effectively improves the overall working efficiency of the comber, and improves the production accuracy and production efficiency. Conclusion: The combers that are textile machinery equipments with comprehensive application of machines, electricity, gases and instruments, play a vital role in enhancing product quality and production efficiency. Highly intelligent and integrated process control, real-time monitoring and accurate data acquisition and data analysis have become the mainstreams in the development of auto-control. Therefore, the commitment of high technology to transform the traditional production mode has also been an important research.


1979 ◽  
Vol 26 (3) ◽  
pp. 3267-3271 ◽  
Author(s):  
A. W. Chao ◽  
R. A. Early ◽  
J. D. Fox ◽  
A. E. Gromme ◽  
R. H. Helm ◽  
...  

Author(s):  
Chong Zou ◽  
Puzhen Gao ◽  
Wei Pan ◽  
Zheng Yang ◽  
Xianbing Chen

We preliminarily designed a power tracking and control system using single-chip computers and industrial control computer in the electric heating simulated power loop. The system is an innovational design based on the proven simulated nuclear power loop, with increased techniques of step-less power regulation system and modeling nuclear feedback effect correctional programs. We promoted both hardware and software designs of this power tracking and control system in this paper. It used single-chip computers as the core control chips and an industrial control computer as the additional correctional program and record carrier. The process and implementation of the control software are presented, which is designed as a fuzzy theoretical nonlinear system. In order to ensure the subsequent updates, the access interface of the system is open for following correctional programs, including the correctional program of void fraction effect, temperature effect, hysteresis effect and heat power distribution effect. Taken hysteresis effect correctional program as an example, we use an offset tic-tac clock replacing the inherent tic-tac clock in different devices of the system in order to reduce the hysteresis effect of measuring and corresponding errors. We also put out a preliminary analysis of the accurate synchronization for the system at the end of the paper.


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