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本文叙述了由微机网络构成的通用遥控遥测系统的组成及工作原理。主控端以IBM-PC机为核心,终端由单片微处理机及其外围芯片构成。讯道采用电话线路,运用载波工作方式,使得数据传输和通话互不影响。系统为“指令—响应”型。各终端以不同的地址码来区分,当主控端要对某终端进行一定的操作时,发出相应的地址码和功能码即指令。被选中的站,根据功能码来响应主控端的控制,完成一定的操作。本系统已通过科学院地学部和唐山市科委组织的技术鉴定,并已在唐山市热力管网中运行两个供暖期。结果表明:系统设计合理,功能齐全,性能良好。从而大大地提高了管理水平,节省了人力物力,具有较高的经济效益和社会效益。
This paper describes the composition and working principle of a universal remote telemetry system composed of computer network. Host to IBM-PC as the core, the terminal consists of a single chip microprocessor and its peripheral chips. The use of telephone lines, the use of carrier mode, making the data transmission and call each other. The system is “command-response” type. Each terminal to a different address code to distinguish, when the control terminal to a terminal for a certain operation, issue the appropriate address code and function code instructions. The selected station, according to the function code to respond to the control of the host, to complete certain operations. This system has passed the technical appraisals organized by the Department of Earth Sciences of the Academy of Sciences and Tangshan Science and Technology Commission and has run two heating periods in the heat pipe network of Tangshan City. The results show that the system has reasonable design, complete functions and good performance. Thus greatly improving the management level, saving manpower and resources, with high economic and social benefits.