公开(公告)号：US4032913A

公开(公告)日：1977-06-28

申请号：US459386

申请日：1974-04-09

申请人： Masami Okamura ,  Fumio Aoki ,  Yoshihiro Sano ,  Jun-ichi Makino ,  Yoshiteru Miki ,  Hiroshi Sasaki ,  Kazuo Seo

发明人： Masami Okamura ,  Fumio Aoki ,  Yoshihiro Sano ,  Jun-ichi Makino ,  Yoshiteru Miki ,  Hiroshi Sasaki ,  Kazuo Seo

IPC分类号： H03M1/12 ,  G01D5/249 ,  H03M7/24 ,  H03M7/30 ,  H03M7/50 ,  H04B1/66 ,  H04L23/00 ,  H03K13/02

CPC分类号： H03M7/50 ,  H03M7/30

摘要： In a parallel digital signal delivered from an AD converter, "1" appearing in a bit position nearest to the most significant digit (MSD) is detected, and the parallel digital signal is converted into a serial digital signal consisting of a weight character indicating this specific bit position and a data character indicating the numerical value of the data. Further, a weight bit is provided for changing the weight of the output of the AD converter depending on the analog quantity subjected to AD conversion so as to reduce the number of bits required for coding the parallel signal.

公开(公告)号：US4620257A

公开(公告)日：1986-10-28

申请号：US632846

申请日：1984-07-20

申请人： Yoshihiro Sano ,  Fumio Iwatani ,  Takao Kubo ,  Yoshiteru Miki

发明人： Yoshihiro Sano ,  Fumio Iwatani ,  Takao Kubo ,  Yoshiteru Miki

IPC分类号： H04B17/00 ,  H02H7/26 ,  H02J13/00

CPC分类号： H02H7/263 ,  H02J13/0055 ,  Y02E60/725 ,  Y04S10/20

摘要： In a carrier relay system in which protective relay apparatus are disposed in terminal stations respectively and interchange information between the terminal stations via a signal transmission line for detecting a trouble occurred in power transmission lines on the basis of the exchanged information, specific information K is inserted in a predetermined position of a signal transmitted from the first terminal station to the second terminal station, and the specific information K is inserted intact in another predetermined position of a signal returned from the terminal station to the terminal station. In the terminal station, the specific information K inserted in the signal transmitted therefrom is compared with the specific information K inserted in the signal returned from the terminal station for deciding the presence or absence of a trouble occurred in the power transmission lines. The signal transmission line extending between the terminal stations includes two transmission channels, and circuit breakers are tripped when a fault has occurred in one or both of the signal transmission channels and a trouble detection relay has operated.

摘要翻译： 在保护中继装置分别设置在终端站中的载波中继系统中，基于所交换的信息，经由用于检测输电线路中出现的故障的信号传输线在各终端站之间交换信息，插入特定信息K 在从第一终端站发送到第二终端站的信号的预定位置，并且将特定信息K完整插入到从终端站返回到终端站的信号的另一预定位置。 在终端中，将从其发送的信号中插入的特定信息K与从终端返回的信号中插入的特定信息K进行比较，以确定在输电线路中是否存在故障。 在终端站之间延伸的信号传输线包括两个传输通道，并且在一个或两个信号传输通道中发生故障并且故障检测继电器已经操作时，断路器跳闸。

公开(公告)号：US3984737A

公开(公告)日：1976-10-05

申请号：US530286

申请日：1974-12-06

申请人： Masami Okamura ,  Yoshihumi Oura ,  Yoshihiro Sano ,  Junichi Makino ,  Yoshiteru Miki

发明人： Masami Okamura ,  Yoshihumi Oura ,  Yoshihiro Sano ,  Junichi Makino ,  Yoshiteru Miki

IPC分类号： H02H3/00 ,  H02H1/00 ,  H02H3/26 ,  H02H3/38 ,  H02H3/42 ,  H02H3/46

CPC分类号： H02H1/0053 ,  H02H3/26 ,  H02H3/382 ,  H02H3/42 ,  H02H3/46

摘要： Protection of an electric power system is attained under control of a digital computer. Voltage and current of the electric power system to be protected are subjected to sampling at a predetermined sampling frequency and are applied to the computer after being converted into digital signals. The computer computes the product of these two digital signal inputs. The signal thus obtained is added to a preceding signal representing the product of voltage and current taken at time before a predetermined period of time so that unnecessary frequency components included in these signals can be removed. Then, the level of the resultant signal (which is free from the unnecessary frequency components) is compared with the level of a reference signal. When the former is greater than the latter, there is a fault in the electric power system, and necessary protective measures are taken to protect the electric power system.

摘要翻译： 在数字计算机的控制下实现电力系统的保护。 要保护的电力系统的电压和电流以预定的采样频率进行采样，并且在被转换成数字信号之后被施加到计算机。 计算机计算这两个数字信号输入的乘积。 由此获得的信号被加到表示在预定时间段之前的时间所获得的电压和电流的乘积的先前信号，从而可以去除包括在这些信号中的不必要的频率分量。 然后，将结果信号（没有不必要的频率分量）的电平与参考信号的电平进行比较。 当前者大于后者时，电力系统存在故障，采取必要的保护措施保护电力系统。

公开(公告)号：US4161651A

公开(公告)日：1979-07-17

申请号：US882909

申请日：1978-03-02

申请人： Yoshihiro Sano ,  Tomio Chiba ,  Hiroyuki Kudou ,  Yoshiteru Miki

发明人： Yoshihiro Sano ,  Tomio Chiba ,  Hiroyuki Kudou ,  Yoshiteru Miki

IPC分类号： G02B6/28 ,  H02H1/00 ,  H02J13/00 ,  H04B10/275 ,  H04B9/00 ,  G01R19/26

CPC分类号： H02J13/0065 ,  G02B6/2817 ,  H02H1/0069

摘要： A system for sampling and collecting simultaneously data from terminal apparatus installed at a plurality of data measuring locations (data sources) distributed in a system to be monitored or controlled by using at least a single optical fiber includes means for initiating sampling of measured quantities in response to a synchronizing signal supplied-from a master station, and means for allotting to the terminal apparatus respective particular time slots during which the data as measured is transmitted to the master station through at least a single optical fiber.

摘要翻译： 一种系统，用于同时从安装在通过使用至少一根光纤监视或控制的系统中的多个数据测量位置（数据源）的数据测量位置（数据源）进行采样和收集数据的系统包括用于响应于开始采样测量量的装置 到从主站提供的同步信号，以及用于向终端设备分配相应的特定时隙的装置，在该时间期间，通过至少一根光纤将所测量的数据发送到主站。