安防网络中的数字及图象信号传输(英文)

COMMUNICATION OF IMAGE AND DIGITAL SIGNAL IN A SAFE PROTECTION SYSTEM

在设计的安全防护网络 (SPN)中 ,前端控制箱与中央控制台之间的联系是由通讯网络来完成的。信息可以数字信号的形式在电力线上传输 ,也可通过调制解调器直接传输图象信号。尤其是数字信号决定着是否报警并采取相关动作。所以其准确性是系统最基本的要求。

In the safe protection net (SPN) designed,the connection of the frontage control boxes and the center control station is accomplished by the communication net.The information could be transferred on the power line in the form of digital signal,or on the telephone line by a modem with and image.It is the digital signal that especially determines the actions of alarming or some related control.So the veracity of it is the main demand to the system.In the SPN designed,some advanced methods are used to ensure the high reliability of the communication of the signals.