发明名称 |
ELECTRIC SIGNALLING INSTALLATION COMPRISING AT LEAST ONE TRANSMITTER AND ONE RECEIVER |
摘要 |
<p>An electrical signalling apparatus including a transmitter and receiver connected to the same electrical power distribution network wherein a signal generated by the transmitter is used to control apparatus connected to the receiver. The system uses a pair of amplitude-modulated low frequency signals as the control signals that react with the receiver to control apparatus connected thereto. The transmitter has an oscillator modulated by twin tuning forks and provides a signal for a period of, for example 10 seconds, determined by a time-delay relay. The receiver has a demodulator followed by two filters connected to integrators. As soon as the integrated signals reach a predetermined value, a control signal is transmitted to the output. This apparatus provides a communication system which is virtually insensitive to interferences on the distribution network and operates perfectly with weak signals.</p> |
申请公布号 |
EP0073776(B1) |
申请公布日期 |
1986.10.22 |
申请号 |
EP19820900620 |
申请日期 |
1982.03.15 |
申请人 |
TRANSEC S.A. |
发明人 |
LECHNER, HEINZ;TAILLENS, JEAN-FRANCOIS |
分类号 |
H02J13/00;H04B3/54;(IPC1-7):H02J13/00 |
主分类号 |
H02J13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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