Method and apparatus for executing a command in a plurality of
electrical metering devices
    2.
    发明授权
    Method and apparatus for executing a command in a plurality of electrical metering devices 失效
    用于在多个电计量装置中执行命令的方法和装置

    公开(公告)号:US5995022A

    公开(公告)日:1999-11-30

    申请号:US744131

    申请日:1996-11-05

    摘要: A method and apparatus for executing a command in a number of electrical metering devices of a power distribution system provides each metering device with a command having a predetermined execution time and subsequently executes the command in each of the metering devices once the present time value equals or exceeds the predetermined execution time. Each electrical metering device includes a clock for providing the present time value as well as a memory device for receiving and storing the command. Each electrical metering device also includes at least one controller or microprocessor for monitoring or comparing the present time value with the predetermined execution time of the stored command and for executing the stored command once the present time value is at least as large as the predetermined execution time. A command may thus be provided to each electrical metering device of a power distribution system at various prior arbitrary times. The command may subsequentially be executed simultaneously in each of the electrical metering devices at the predetermined execution time.

    摘要翻译: 用于在配电系统的多个电计量装置中执行命令的方法和装置为每个计量装置提供具有预定执行时间的命令,并且随后在每个计量装置中执行命令,一旦当前时间值等于或等于 超过预定执行时间。 每个电计量装置包括用于提供当前时间值的时钟以及用于接收和存储该命令的存储装置。 每个电计量装置还包括至少一个控制器或微处理器,用于监视或比较当前时间值与所存储的命令的预定执行时间,并且一旦当前时间值至少与预定执行时间一样大,则执行存储的命令 。 因此,可以在各种先前的任意时间向配电系统的每个电计量装置提供命令。 在预定执行时间,可以在每个电计量装置中顺序执行该命令。

    Method of serially processing binary characters asynchronously received
by an electrical energy meter
    3.
    发明授权
    Method of serially processing binary characters asynchronously received by an electrical energy meter 失效
    串行处理由电能表异步接收的二进制字符的方法

    公开(公告)号:US5469153A

    公开(公告)日:1995-11-21

    申请号:US968948

    申请日:1992-10-30

    CPC分类号: H04Q9/14 H02J13/00

    摘要: A method of processing binary characters received by an electrical energy meter includes the step of generating a clock signal internal to the meter so that asynchronously received serial data can be processed, even though a synchronization clock signal does not accompany the serial data. The method includes the steps of detecting receipt of a first of a string of binary input characters at a serial input/output port of the meter, and then sampling the detected first character by generating a respective first clock signal which is phase-synchronized with a least significant bit of the first character. These steps are then repeated in sequence for each subsequently received character in the string. The sampled characters can be temporarily stored in meter hardware such as a register and written to memory such as programmable read-only or random-access memory. Phase-synchronization between the sampling clock signals and each of the respective characters is achieved even though the data rate of the binary string (e.g., 9600 bits/sec) is unequal to an integer fraction of the frequency of the main crystal oscillator of the meter (e.g., 4.19 MHz), which controls meter operations.

    摘要翻译: 一种处理由电能表接收的二进制字符的方法包括产生仪表内部的时钟信号的步骤,即使同步时钟信号不伴随串行数据,也可以处理异步接收的串行数据。 该方法包括以下步骤:检测在仪表的串行输入/输出端口处的一串二进制输入字符的接收,然后通过产生与第一个时钟信号相同步的相应的第一时钟信号来对所检测的第一个字符进行采样 第一个字符的最低有效位。 然后,对于字符串中随后接收的每个字符,依次重复这些步骤。 采样字符可以临时存储在诸如寄存器的仪表硬件中,并写入诸如可编程只读或随机存取存储器之类的存储器。 即使二进制串的数据速率(例如,9600比特/秒)不等于仪表的主晶体振荡器的频率的整数分数,也可以实现采样时钟信号和各个字符之间的相位同步 (例如,4.19 MHz),可控制仪表运行。

    Method and apparatus for sharing passwords
    4.
    发明授权
    Method and apparatus for sharing passwords 失效
    用于共享密码的方法和设备

    公开(公告)号:US5428351A

    公开(公告)日:1995-06-27

    申请号:US998064

    申请日:1992-12-28

    摘要: The method and apparatus for sharing passwords includes an electronic meter comprising a metering unit, a register unit, an optical port, and a communications unit. An external reading device, such as a handheld reading device or a personal computer, is coupled to the communication board via the optical port. The method and apparatus for sharing passwords provides that both the meter register and the communications unit have the same security code. In addition, the communications unit is able to distinguish between a security code for the communications unit and a security code for the meter register, and the communications unit will not interfere with communications between the external reading device and the meter register.

    摘要翻译: 用于共享密码的方法和装置包括一个包括计量单元,寄存器单元,光学端口和通信单元的电子仪表。 诸如手持读取装置或个人计算机的外部读取装置经由光学端口耦合到通信板。 用于共享密码的方法和装置提供了仪表寄存器和通信单元具有相同的安全码。 此外,通信单元能够区分用于通信单元的安全代码和用于仪表寄存器的安全代码,并且通信单元不会干扰外部读取设备和仪表寄存器之间的通信。