多点测温与长线传输在分布式测温系统中的研究

Research on the Multi-point Temperature Measurement and Long-line Transmission in Distributed Temperature Measurement System

针对分布式温度测量系统中多点温度测量问题,设计了长线传输电路。详细阐述了利用一个I/O端口连接多个传感器来编制公用程序的方法,以实现多个温度测量的方法,较好地解决了多个I/O口多点测温的设计问题;给出了单总线温度传感器多点测温硬件连接方法,解决了数字温度传感器在长线传输中温度的正确读取以及电路设计的关键问题。

In accordance with the issue of temperature measurement for multiple points in distributed temperature measurement system, the long-line transmission circuit has been designed. The methods of connecting multiple sensors by using single I/O port, and programming the common program for implementing multi-point temperature measurement are described in detail. This better solved the design problem of multi- point temperature measurement with multiple I/O ports. The hardware connection of the single bus temperature sensor multi-point temperature measurement is given, the research and the key points of circuit design and correctly reading temperature of the digital temperature sensor in long-line transmission are solved.