Remote control system and method for vehicle
First Claim
1. A remote control system for vehicle-mounted equipment comprising:
- a portable device which receives a request signal and transmits a response signal in response to the request signal;
a vehicle-side unit mounted on a vehicle and including a transmitter for transmitting the response signal into a compartment of the vehicle, a receiver for receiving the predetermined signal from the portable device, and control means for controlling operation of vehicle-mounted equipment when the response signal is received;
a reference receiver mounted in the vehicle and receiving a signal transmitted from the transmitter; and
output adjusting means for adjusting a signal transmission output of the transmitter based upon a result of reception of the signal by the reference receiver.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle has a reference receiver installed at an outer edge position of a desired detection area in a compartment to receive a signal transmitted from a transmitter in the compartment. The level of signal transmission output of the transmitter is adjusted based on the reception result of the reference receiver. It becomes possible to adjust the signal transmission output of the transmitter in the compartment so as to obtain a desired detection area at all times irrespective of change of the detection area reached by the request signal from the transmitter determined by the compartment or irrespective of variation in the electromagnetic wave environment in which the vehicle is placed.
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Citations
10 Claims
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1. A remote control system for vehicle-mounted equipment comprising:
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a portable device which receives a request signal and transmits a response signal in response to the request signal; a vehicle-side unit mounted on a vehicle and including a transmitter for transmitting the response signal into a compartment of the vehicle, a receiver for receiving the predetermined signal from the portable device, and control means for controlling operation of vehicle-mounted equipment when the response signal is received; a reference receiver mounted in the vehicle and receiving a signal transmitted from the transmitter; and output adjusting means for adjusting a signal transmission output of the transmitter based upon a result of reception of the signal by the reference receiver. - View Dependent Claims (2, 3)
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4. A remote control system for vehicle-mounted equipment comprising:
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a portable device which receives a request signal and transmits a response signal in response to the request signal; a vehicle-side unit mounted on a vehicle and including a transmitter for transmitting the request signal into a compartment of the vehicle, a receiver for receiving a response signal from the portable device, and control means for controlling the operation of the vehicle-mounted equipment when the response signal is received; a reference transmitter-receiver mounted in the vehicle, receives a signal transmitted from the transmitter and transmits a predetermined return signal when the signal is received; and output adjusting means for adjusting a signal transmission output of the transmitter based upon the return signal from the reference transmitter-receiver. - View Dependent Claims (5, 6)
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7. A remote control method for a vehicle comprising:
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transmitting a request signal from a transmitter provided in a vehicle into a compartment of the vehicle to be received by a portable device carried by a user; allowing the user to operate the vehicle when a response signal is received from the portable device in response to the request signal; transmitting a predetermined signal from the transmitter into the compartment to be received by a reference receiver provided in the vehicle; and changing a signal output level of the transmitter based on a state of reception of the predetermined signal by the reference receiver so that the signal output level of the transmitter is adjusted to generally correspond to the compartment of the vehicle. - View Dependent Claims (8, 9, 10)
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Specification