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    • 5. 发明授权
    • System for detecting defective point on power transmission line by
utilizing satellite
    • 通过使用卫星检测电力传输线上的缺陷点的系统
    • US5070537A
    • 1991-12-03
    • US445647
    • 1989-11-24
    • Sakari OhiraMasatoshi YamakiAkira TerashimaMasaaki Ozawa
    • Sakari OhiraMasatoshi YamakiAkira TerashimaMasaaki Ozawa
    • G01R31/08H02H3/28
    • G01R31/088
    • The invention relates to a system for detecting any defective point on a power transmission line by making use of highly-accurate time signal transmitted from a satellite and by utilizing a digital data processing system. The system comprises a master station and a subordinate station, each of the stations having a surge detection circuit capable of detecting a surge voltage generated as a result of cutting of a power transmission line, a GPS receiver for delivering a predetermined periodical pulse and a reset signal in accordance with the electric wave from a satellite, and a time counter/time base which is reset at a period of 1 second in accordance with the signal from the GPS receiver and which is capable of converting a pulse of a predetermined period derived from the GPS receiver into a binary-coded digital signal, the system further comprising modulation/demodulation means for enabling the digital signal generated by the time counter/time base to be transmitted from the subordinate station to the master station, and a processor controller provided in the master station and capable of conducting a comparison between the digital signals so as to determine the distance to the point at which the power transmission line is cut.
    • PCT No.PCT / JP89 / 00318 Sec。 371日期:一九八九年十一月二十四日 102(e)日期1989年11月24日PCT 1989年3月24日PCT公布。 第WO89 / 09415号公报 日期:1989年10月5日本发明涉及一种通过利用从卫星发送的高度准确的时间信号和利用数字数据处理系统来检测输电线路上的缺陷点的系统。 该系统包括主站和下属站,每个站具有浪涌检测电路,该浪涌检测电路能够检测由于输电线切断而产生的浪涌电压,用于传送预定周期脉冲的GPS接收器和复位 根据来自卫星的电波的信号,以及根据来自GPS接收机的信号在1秒的周期复位的时间计数器/时基,并且能够将从 将GPS接收机转换为二进制编码的数字信号,该系统还包括用于使由时间计数器/时基产生的数字信号能够从下属站发送到主站的调制/解调装置,以及处理器控制器 主站,并且能够进行数字信号之间的比较,以便确定到电力点的距离 r传输线被切断。