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    • 21. 发明专利
    • Detector for fault position of power-transmission line
    • 电力传输线故障位置检测器
    • JPS59131177A
    • 1984-07-27
    • JP703683
    • 1983-01-17
    • Mitsubishi Electric Corp
    • ADACHI KAZUOYAMAUCHI TOSHITANE
    • H02H7/26G01M11/00G01R31/08
    • Y04S10/522
    • PURPOSE: To spot accurately a fault point by connecting a power-transmission fault detector installed on a steel tower to an optical fiber fault locator through an optical fiber, and monitoring remotely its operation state.
      CONSTITUTION: The power-transmission line fault detector 22 consists of an optical fiber breaker 31, optical fiber excessive-length storage part 32, and a power-transmission line fault detection part 33. If a fault occurs to a power- transmission line 1, the power-transmission line fault detection part 33 of the power-transmission line fault detector 22 installed on each steel tower which is closest to the fault point operates and the optical fiber breaker 31 operates associatively to disconnect the optical path of the optical fiber 32 combined with an overhead earth wire. Every power-transmission line fault detector 22 is monitored by the optical fiber fault locator 24 through the optical fiber 23, so the position of the fault point is spotted accurately.
      COPYRIGHT: (C)1984,JPO&Japio
    • 目的:通过将钢塔上安装的输变电故障检测器与光纤故障定位器连接,通过光纤进行远程监控,从而准确识别故障点。 构成:输电线路故障检测器22由光纤断路器31,光纤过长存储部32和输电线路故障检测部33组成。如果输电线路1发生故障, 安装在最靠近故障点的每个钢塔上的输电线路故障检测器22的输电线路故障检测部分33工作,并且光纤断路器31相关联地操作以将光纤32的光路分离 用架空地线。 每个输电线路故障检测器22由光纤故障定位器24通过光纤23进行监控,因此故障点的位置被精确地发现。
    • 22. 发明专利
    • CODING METHOD
    • JPS5637748A
    • 1981-04-11
    • JP11365379
    • 1979-09-04
    • MITSUBISHI ELECTRIC CORP
    • YAMAUCHI TOSHITANE
    • H03M13/00H04L1/00
    • PURPOSE:To increase the coding efficiency at the inferior transmission circuit and also securing high reliability, by converting the information word of the CRC coding method into the matrix and then giving the parity check code to the matrix. CONSTITUTION:For example, the undetected error rate PB is reduced by adding the internal coding of the information length R bit to the (n, R, 4) CRC (Cyclic Redundancy Check) coding of the code length (n) bit, the information R bit and the intercode distance 4. Then the R bit has constitution (R=aXb) of the row (a) and the column (b) each, and the data obtained by calculating the parity of each row direction of the row (a) and the column (b-1) up to the (b-1) column, i.e., the composite coding method having the horizontal parity code is adopted for the column (b) data of the final column. The figure shows the matrix in which the information word of (k) bit is set for the row (a) and the column (b) each, and the (r) bit is the CRC check bit, i.e., the redundant bit which means the residual obtained by dividing the equation aXb=k by the grown polynomial g(x).