The Design of the Loss-in-Weight Weighing Controller

In order to achieve higher precision, reliability and stability, lower cost and power consumption, friendly user interface and network functions, loss-in-weight weighing Controller based on ARM9 and Windows CE is designed for controlling dynamic real time batching equipment. This paper first introduces the working principle and architecture of the embedded Controller, then explains hardware system component and design of software system of the Controller, developed on Platform Builder 5.0. The paper pays more attention on the application layer development. Subfuctions of application software are introduced and working flow chart of main modules is given. Double incremental PID algorithm used by the system is presented to achieve the highest accuracy in the shortest possible time. The high precision 0.1% can be achieved, and Controller products are widely used in the metallurgy, chemical industry.

Operating System for the Dynamic Belt Measurement

Firstly, The core model, structure module, performance characteristics and JTAG debug interface of the microprocessor were described by this article. Then, the system power supply module, prior to the passage weighing signal and tachometer signal circuits were designed in this paper. Secondly, according to the operational needs of the belt scale system, the external memory circuit and the TFT-LCD touch screen circuit modules were studied. Finally, the high-speed circuit board PCB designed to solve EMC problems. And it described the data collection and weighing controller bus communication test situation and established the communications test platform of Profibus-DP, introduced the test experimental procedures, experiment shows the communication between master and slave test results are correct.The computing speed and accuracy, data processing compared with traditional electronic belt scale, information exchange, integration, reliability and stability will be greatly improved by the advanced embedded technology and so on.

The Design of the Network Weighing Monitoring System Based on Embedded Controller

The functions and the characteristics of RS-485 bus, I-7188 embedded controller, and SK2001 intellectual weighting controller are introduced briefly in this paper. The communication protocol of weighing controller, design of system hardware and software, and implementation of communication function are also analyzed in detail here. The serial communication between I-7188 and multiple weighing controllers has been implemented by using RS-485. As a result, the centralized control of the distributed equipments, the acquisition and automation upload of the metering data have been accomplished. The results of practical application show that this system has the characteristic of high stability and tolerance; it is easy to be managed and expanded as well.