Apparatus for checking identification signal and method thereof

Details Apparatus for checking identification signal and method thereof Apparatus for checking identification signal and method thereof

1997-05-09

1999-10-05

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

34082531, 34082534, 34082569, 34082572, 341176, G08G 100

Patent

active

059631414

ABSTRACT:
An identification signal checking apparatus includes an apparatus (1) to be detected having a first wireless transmitting and receiving unit (4), a first signal processing unit (3) and a first memory unit (5) for storing an identification signal and includes a detecting device (10) having a second wireless transmitting and receiving unit (11), a second signal processing unit (12), a second memory unit (13) for storing an identification signal, and a communication permission signal generating means (14), being arranged such that the apparatus (1) to be detected transmits a communication request signal, when receiving a communication permission signal transmitted from the detecting apparatus (10) based on the communication request signal within a predetermined period, the apparatus (1) to be detected transmits the identification signal stored in the first memory unit (5) to the detecting apparatus (10), and the detecting apparatus (10) checks whether or not the transmitted identification signal coincides with the identification signal stored in the second memory unit (13).

REFERENCES:
patent: 4509093 (1985-04-01), Stellberger
patent: 5473318 (1995-12-01), Martel

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