DE19611830A1 - Time signal distribution system for AC power network - Google Patents

Abstract

The distribution system has two translators for adding the time signal to the power supply network and at the receiving end for extracting the signal from the network. The signal does not have to be converted for transmission by the network, but the translator at the receiving end has a long wave receiver for capture and decoding of the signal. The signal is fed into the supply network by the utility company using a long wave signal at the main transformer via the primary side winding and this is carried over to the secondary side by the coupling between the two coils.

Description

The invention relates to a system for distributing a time signal via the AC voltage network according to the preamble of claim 1.

For household appliances such. B. washing machines tumble dryers, dishes dishwashers or herds using a radio clock receiver for DCF 77 reception to be equipped, problems arise with the Receiving antenna, since these devices are usually clad with sheet iron, with which an antenna is only functional outside the housing. There is however, it cannot be attached for functional reasons.

This problem can be avoided if the time signal in the nor male 220 V AC network is fed. It is then above that Power cords are available on every AC powered device. A separate au External antenna is unnecessary.

Such a system is known from DE-A-31 13 377. It includes one he The unit for reception that is output by the long-wave transmitter DCF 77 beamed, coded time information and contains the functional elements a superhet receiver until the intermediate frequency signal is generated as well as for the separation, reinforcement and coupling of a side band of the intermediate frequency signal into the chip inside the building or building power supply network. In a second embodiment, the Zwi frequency signal modulated back to a carrier frequency and on finally coupled into the power supply network. In the consumer the corresponding signals are transmitted to the demodulators  fed the original, encoded time information from the signal win back. Furthermore, autonomous clocks are provided, which at the display or a failure of the radio-assisted time signal Take over switching functions in the consumers.

This known system has the disadvantage that to feed the time character signal in the power supply network a complete Rundfunkemp must be present during the signal demodulation in the Power supply connected consumers.

The object of the invention is therefore a system for distributing a time Chensignal to indicate over the AC network that the above. After avoid parts. This task is solved by a distribution system a time signal with the features of claim 1. The advantage adhesive embodiment of the invention takes place according to the features of pending claims.

In the system for distributing a time signal over the change voltage network is provided, the long-wave signal of the time signal the DCF 77 can be fed directly into the AC network. There is one central antenna, a bandpass filter, based on the frequency of the time signal transmitter is matched, an amplifier stage and a coupling device the AC network is provided. On the device side, the long wave signal of the time signal transmitter via a transmitter from the Power supply network decoupled and a time signal receiver ger how he z. B. from the company TEMIC TELEFUNKEN microelectronic under the Designation U 4221 B, U 4222 B, U 4223 B, U 4224 B or U 4226 B sold is fed. As has become common practice, serves here too the radio clock receiver primarily for periodic adjustment an autonomous quartz watch. Because of the high sensitivity of the Radio clock receivers listed above are small levels of long-wave Si gnals on the AC network sufficient, so that none Disruptions are expected.  

The long wave signal can be fed into the AC network both locally, i.e. H. within the building or apartment, as well as across the board done by the energy supply companies. In the nationwide Case, the long-wave signal on large transformers, for. B. by primary side coupling and secondary coupling, pass by be tested.

Claims (2)

1. System for distributing a time signal over the AC voltage network with a first transformer for feeding the Zeitzeichen signal into the AC network and at least a second transmitter for decoupling the time signal from the AC network, characterized in that the time signal directly, without conversion to the AC network is fed and that every second transmitter is connected to a long-wave receiver for receiving and for decoding the time signal. 2. System for distributing a time signal over the AC chip Network according to claim 1, characterized in that when feeding of the time signal signal by the energy supply companies wave signal on large transformers by primary coupling and secondary coupling is passed by.