Tire pressure, speed and acceleration monitoring system and method
First Claim
1. A tire pressure, speed and acceleration monitoring system, comprising:
- a transducer mounted to a wheel, the transducer receiving power wirelessly and transmitting a pressure signal;
a controller receiving the pressure signal.
1 Assignment
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Accused Products
Abstract
The tire pressure, speed and acceleration monitoring system of the present invention has a transducer mounted to the wheel of a motor vehicle and a controller mounted to a non-rotating part of the vehicle. The transducer is passive and receives its power from an interrogation signal from the controller. The transducer replies with a pressure signal. The tire pressure may be frequency encoded. This is accomplished by having a resonant circuit whose resonant frequency depends on the tire pressure. Speed and acceleration are calculated by determining when the transducer passes the receiver of the controller. Since the range of the transducer is very limited, the transducer will only respond to an interrogation signal when the transducer is next to the controller receiver. The transducer has a tire pressure fill valve.
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Citations
20 Claims
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1. A tire pressure, speed and acceleration monitoring system, comprising:
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a transducer mounted to a wheel, the transducer receiving power wirelessly and transmitting a pressure signal; a controller receiving the pressure signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a tire pressure, speed and acceleration monitoring system, comprising the steps of:
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a) transmitting an interrogation signal from a controller; b) receiving the interrogation signal at a transducer on a rotating wheel; c) powering the transducer using the interrogation signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A tire pressure, speed and acceleration monitoring system, comprising:
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a controller having an acquisition algorithm transmitting an interrogation signal; and a transducer mounted to a wheel transmitting a response signal when the interrogation signal is received. - View Dependent Claims (17, 18, 19, 20)
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Specification