Vehicle with position detector
First Claim
1. A vehicle with a position detector comprising:
- a communication means for issuing information to be used for deciding the position of the vehicle;
a main power supply means installed in the vehicle for supplying electric power for said communication means; and
a control means for maintaining the supply of electric power to said communication means for a predetermined time after turning OFF said main power supply means, wherein the time for maintaining the supply of electric power to said communication means is set to be longer than an issuing interval of information to be used for deciding the position of the vehicle.
1 Assignment
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Accused Products
Abstract
The position of a vehicle is to be detected accurately while suppressing the consumption of a battery. In accordance with instructions given from a position detection service center a base station issues requests at certain intervals. A vehicle V, upon receipt of a request, issues an answer signal containing ID information. On the basis of the answer signal the position detection service center decides the position of the vehicle V and offers the position information to a control center on demand. Electric power is supplied from a vehicular battery to an answer signal issuing member installed in the vehicle V. Even after a main power supply switch is turned OFF, the supply of electric power from the battery is continued, thus permitting an answer to a request from the base station. Consequently, the control center can determine a vehicular stop position accurately.
9 Citations
12 Claims
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1. A vehicle with a position detector comprising:
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a communication means for issuing information to be used for deciding the position of the vehicle;
a main power supply means installed in the vehicle for supplying electric power for said communication means; and
a control means for maintaining the supply of electric power to said communication means for a predetermined time after turning OFF said main power supply means, wherein the time for maintaining the supply of electric power to said communication means is set to be longer than an issuing interval of information to be used for deciding the position of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A position detector for a vehicle comprising:
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a communication means for issuing a signal to be used for detecting a position of a vehicle;
a main power supply means for supplying electric power to said communication means; and
a control means operatively connected to said main power supply means for maintaining the supply of electric power to said communication means for a predetermined time after turning OFF said main power supply means, wherein the time for maintaining the supply of electric power to said communication means is set to be longer than an issuing interval of information to be used for determining the position of the vehicle. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification