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1. 发明授权

US4400782A Corrosion monitoring system using a metal pipe for transmission of monitoring signals 失效
标题翻译：腐蚀监测系统采用金属管道传输监测信号
公开(公告)号：US4400782A
公开(公告)日：1983-08-23
申请号：US238107
申请日：1981-02-25
申请人： Masashi Ishikawa , Masatoshi Shimada , Katsutomo Okamoto , Shigeyoshi Sugita , Masayuki Goto , Yukuo Koizumi , Osamu Kaneda
发明人： Masashi Ishikawa , Masatoshi Shimada , Katsutomo Okamoto , Shigeyoshi Sugita , Masayuki Goto , Yukuo Koizumi , Osamu Kaneda
IPC分类号： C23F13/00 , C23F13/04 , G01V3/00 , G01R31/02
CPC分类号： C23F13/04
摘要： In a monitoring system for protecting a metal pipe against corrosion, transmission of monitoring signals is carried out by the use of the pipe itself as a transmission line between a center station and a substation, which are coupled to the pipe at center and subordinate locations, respectively. The substation sends data signals over the pipe to the center station. These data signals represent the degree of corrosion that is measured at the subordinate location and are monitored by the center station. When a plurality of substations are coupled to the pipe, the center station selects a substation by transmitting through the pipe an address assigned to the substation. Each substation returns the assigned address to the center station in combination with the signals representing the measured degree of corrosion at the addressed substation. Preferably, the center station produces the selected address twice while each substation produces the assigned address and the measured corrosion signal, twice. Alternatively, the center station supplies a control signal in combination with the selected address, from the center station to remotely control each substation. A repeater may be interposed between the center station and the substation.
摘要翻译：在用于保护金属管道免受腐蚀的监控系统中，通过使用管道本身作为中心站和变电站之间的传输线来执行监控信号的传输，中心站和变电站在中心和下属位置处耦合到管道，分别。变电站通过管道向中心站发送数据信号。这些数据信号表示在下属位置测量并由中心站监测的腐蚀程度。当多个变电站耦合到管道时，中心站通过管道发送分配给变电站的地址来选择变电站。每个变电站将分配的地址与表示所寻址变电站的测得的腐蚀程度的信号相结合地返回给中心站。优选地，中心站产生所选择的地址两次，而每个变电站产生两次分配的地址和测量的腐蚀信号。或者，中心站从中心站提供与所选地址组合的控制信号，以远程控制每个变电站。在中心站和变电站之间可设置中继器。

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