Tire location detecting apparatus with transmitters configured to transmit signals at predetermined angular positions
First Claim
1. A wheel identifying apparatus comprising:
- a plurality of transmitters each of which is mounted on one of a plurality of wheels of a vehicle with a given distance from a rotation axis of the one of the wheels, each of the transmitters being configured to transmit a signal when an angular position thereof coincides with a predetermined angular position; and
a receiver including a receiving antenna located at such a predetermined position on a body of the vehicle that all distances from the receiving antenna to the rotation axes of the wheels of the vehicle are different from each other, the receiver being configured to;
receive, via the receiving antenna, all the signals transmitted from the transmitters, detect, for each of the received signals, a received signal level thereof, and identify, for each of the received signals, the wheel on which the transmitter having transmitted the received signal is located, based on the detected received signal level of the received signal.
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Accused Products
Abstract
According to the invention, a wheel identifying apparatus includes a plurality of transmitters and a receiver. Each of the transmitters is mounted on one of wheels of a vehicle with a given distance from a rotation axis of the wheel. Each of the transmitters is configured to transmit a signal when an angular position thereof coincides with a predetermined angular position. The receiver includes a receiving antenna located at such a predetermined position on a body of the vehicle that all distances from the receiving antenna to the rotation axes of the wheels of the vehicle are different from each other. The receiver works to receive all the signals transmitted from the transmitters, detect the received signal levels of the signals, and identify, for each of the signals, the wheel on which the transmitter having transmitted the signal is located, based on the detected received signal level of the signal.
21 Citations
19 Claims
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1. A wheel identifying apparatus comprising:
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a plurality of transmitters each of which is mounted on one of a plurality of wheels of a vehicle with a given distance from a rotation axis of the one of the wheels, each of the transmitters being configured to transmit a signal when an angular position thereof coincides with a predetermined angular position; and
a receiver including a receiving antenna located at such a predetermined position on a body of the vehicle that all distances from the receiving antenna to the rotation axes of the wheels of the vehicle are different from each other, the receiver being configured to;
receive, via the receiving antenna, all the signals transmitted from the transmitters, detect, for each of the received signals, a received signal level thereof, and identify, for each of the received signals, the wheel on which the transmitter having transmitted the received signal is located, based on the detected received signal level of the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wheel identifying apparatus comprising:
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four rotation direction detecting devices each of which is mounted on one of front-right, front-left, rear-right, and rear-left wheels of a vehicle to detect rotation direction of the one of the wheels and outputs a rotation direction signal representative of the detected rotation direction;
four transmitters each of which is mounted on one of the wheels of the vehicle with a given distance from a rotation axis of the one of the wheels to have association with the rotation direction detecting device on the one of the wheels, each of the transmitters being configured to transmit a frame that contains the rotation direction signal outputted from the associated rotation direction detecting device when an angular position thereof coincides with a predetermined angular position; and
a receiver including a receiving antenna located at such a predetermined position on a body of the vehicle that at least distances from the receiving antenna to the rotation axes of the front-side wheels of the vehicle are different from those from the receiving antenna to the rotation axes of the rear-side wheels of the vehicle, the receiver being configured to;
receive, via the receiving antenna, all the frames transmitted from the transmitters, detect, for each of the received frames, a received signal level thereof, and determine, for each of the received frames, whether the transmitter having transmitted the frame is located on one of the right-side wheels or one of the rear-side wheels of the vehicle based on the rotation direction signal contained in the received frame and whether the same is located on one of the front-side wheels or one of the rear-side wheels of the vehicle based on the received signal level of the received frame. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification