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0 概述 有线通信包括两种:一种是利用邮电部门的公用电话线;另一种是水利部门自己布设的专用线。专用线主要用于水文参数的近距离测量,例如,库水位、流速等参数的信号传输均采用有线通信方式。本文主要介绍邮电部门的公用电话线在水利水文中的应用。 世界上发达国家使用公用电话线进行水文参数传输的时间较长、面较宽。过去我国由于受通信
0 Overview There are two types of wired communications: one is the use of PSTN public telephone lines; the other is dedicated lines laid by the WR department. Dedicated line is mainly used for short-range hydrological parameters of the measurement, for example, the library water level, flow rate and other parameters of signal transmission are used wired communication. This article mainly introduces the application of PSTN PSTN in water conservancy and hydrology. Developed countries in the world use public telephone lines to transmit hydrological parameters for a long time and have a wide surface. In the past due to communication in our country