稳定土厂拌设备两种控制方式的比较（Comparison of two control methods for stabilized soil mixing plant）.doc

稳定土厂拌设备两种控制方式的比较（Comparison of two control methods for stabilized soil mixing plant） Comparison of two control methods for stabilized soil mixing plant 2011-05-27 16:57 1. metering methods and performance requirements 1. measurement methods and performance requirements The electronic metering system of stabilized soil mixing plant can be controlled by 3 control modes, such as instrument, industrial computer and PLC (programmable controller). As the stage on the analog control with PLC in the practical application of the effect is not very ideal, so now the majority of electronic control system for dynamic measurement of stabilized soil mixing plant by computer control and batching instrument control two ways. The theory can be two kinds of control methods to achieve the system measurement error is not more than 2% aggregate system, powder measurement error less than 1%. The application software is compiled under the corresponding platform, and the Chinese character operating system is used, and only phrases or words can be used for the title, and the functions can be as follows: Can be a variety of materials in the total set and single flow, the material flow ratio set; the actual flow and the flow of computer display and consistent system; dynamic simulation of single scale display; computer can perform real-time parameter display and historical data management system; for each run, the cumulative yield the operation time ratio, parameter query and print; bumpless switching can realize manual and automatic batching system; password setting function, to ensure the safety of the system; the import of computer (core) of all the signals for photoelectric isolation, isolation voltage is more than 2500V; the system has self diagnosis function, can be on the cards the material of the lack of material, diagnosis, and equipped with the necessary alarm facilities. 2. comparison of two control methods Industrial computer control is developed on the basis of instrument control