Title:
COMMUNICATING DEVICE FOR VEHICLE
Document Type and Number:
Japanese Patent JP3211674
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To quickly and exactly attain communication by increasing communicating frequency while setting the same frequency at the time of providing plural antenna units.
SOLUTION: Each antenna unit 16-18 arranged at the gantry of a charge collecting place is set with the same frequency so that the communicating period of the adjacent one can be alternate, and a down-link period for transmitting a question signal and an up-link period for transmitting a non-modulated carrier wave and receiving the response signal are set as the communicating period. An on-vehicle equipment 30 receives a signal, generates a response signal by a controlling circuit 42, transmits it by reflection, fixes the communicating party, and operates a communication processing. The communicating period is shifted between the adjacent antenna units so that any radio interference can not be generated. Also, the down-link period and the up-link period are made coincident between the separated antenna units 16 and 18 whose communicating areas are not overlapped so that any radio interference can not be generated.
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Inventors:
Toshihide Ando
Taisei Kato
Taisei Kato
Application Number:
JP22105596A
Publication Date:
September 25, 2001
Filing Date:
August 22, 1996
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G07B15/00; (IPC1-7): G07B15/00
Domestic Patent References:
| JP829527A | ||||
| JP293390A | ||||
| JP6243385A | ||||
| JP6508452A |
Attorney, Agent or Firm:
Tsuyoshi Sato
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