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    • 1. 发明公开
    • Improvements in or relating to electricity meters
    • 电表或与电表有关的改进
    • EP0772052A1
    • 1997-05-07
    • EP96115904.3
    • 1996-10-04
    • SIEMENS MEASUREMENTS LIMITED
    • Graham, IanHarrison, LeighBain, David
    • G01R21/127
    • G01R21/133
    • An electricity meter for the measurement of electrical energy (1) supplied to a consumer (2) comprising a first measurement circuit (3) which produces a first analogue signal the amplitude of which is representative of supplied current, a second measurement circuit (4) which produces a second analogue signal representative of supplied voltage, a triangular waveform reference signal generator (14) , two comparators (10,13) to which said first and second analogue signals respectively and the triangular waveform reference signal are fed so that the comparators each produce a pulse-width modulated output signal characteristic of current and voltage respectively, the mark/space ratio of which is determined in dependance upon the amplitude of the analogue signal fed thereto, the output signals each being repeatedly sampled to produce in respect of voltage and current, during consecutive periods corresponding to each cycle of the triangular waveform reference signal a plurality of samples, corresponding current and voltage samples for each period being mutually multiplied and integrated thereby to provide a signal indicative of energy supplied.
    • 一种用于测量提供给消费者(2)的电能的电表(1),包括产生第一模拟信号和第二测量电路(4)的第一测量电路(3),所述第一模拟信号的振幅表示所提供的电流, 其产生代表所提供的电压的第二模拟信号,三角波形参考信号发生器(14),两个比较器(10,13),所述第一和第二模拟信号分别以及三角波参考信号被馈送至所述比较器 产生分别具有电流和电压特性的脉宽调制输出信号,该信号的标记/空间比取决于馈送给其的模拟信号的幅度来确定,每个输出信号被重复地采样以产生电压,并且 在对应于三角波形基准信号的每个周期的连续周期中,在多个采样中, 每个周期的相应的电流和电压采样相互相乘并积分,从而提供表示所提供的能量的信号。
    • 3. 发明公开
    • A polled communications network
    • Aufrufdatenübertragungsnetz。
    • EP0598297A2
    • 1994-05-25
    • EP93118050.9
    • 1993-11-08
    • SIEMENS MEASUREMENTS LIMITED
    • Sheppard, Timothy JohnGraham, Ian
    • H04L12/40
    • H04Q9/00H04L12/403H04Q2209/10H04Q2209/60
    • The network comprises a master unit 10 and a plurality of slave units 20 to 25. The master unit is arranged to send messages to, and receive messages from each slave unit. The master unit issues a log-on request message which is received by the slave units, but only the slave units which have not communicated with the master unit before (ie. new slave units) respond to the message. In this way the master unit recognises new slave units connected to the network, enabling the master unit to communicate with them. The network may be used to remotely read electricity meters and automatically recognises when a new meter is connected to the network.
    • 网络包括主单元10和多个从单元20至25.主单元被布置成向每个从单元发送消息并从每个从单元接收消息。 主单元发出由从单元接收的登录请求消息,但是仅在未被通信的主单元(即,新的从单元)响应该消息的从单元之前。 以这种方式,主单元识别连接到网络的新的从单元,使得主单元能够与它们通信。 该网络可用于远程读取电表,并自动识别何时将新的仪表连接到网络。