Batteryless tire pressure monitoring system
First Claim
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1. A batteryless tire pressure sensing device comprising:
- a sensor disposed in conjunction with a wheel for sensing at least one pressure-related parameter of a tire;
an antenna coupled to said sensor for receiving a microwave energy signal; and
a control circuit coupled to said antenna and said sensor for converting at least a portion of said microwave energy signal to a supply voltage for providing power to said sensor;
wherein said sensor senses said at least one pressure related parameter of said tire in response to receiving said supply voltage from said control circuit.
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Abstract
A batteryless tire pressure sensing device is provided that includes a sensor disposed in a wheel for sensing at least one pressure-related parameter of a tire. An antenna is coupled to the sensor for receiving a modulated microwave energy signal. A control circuit coupled to the antenna and the sensor converts at least a portion of the modulated microwave energy signal to a supply voltage for providing power to the sensor. The sensor senses the at least one pressure related parameter of the tire in response to receiving the supply voltage from the control circuit.
21 Citations
20 Claims
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1. A batteryless tire pressure sensing device comprising:
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a sensor disposed in conjunction with a wheel for sensing at least one pressure-related parameter of a tire;
an antenna coupled to said sensor for receiving a microwave energy signal; and
a control circuit coupled to said antenna and said sensor for converting at least a portion of said microwave energy signal to a supply voltage for providing power to said sensor;
wherein said sensor senses said at least one pressure related parameter of said tire in response to receiving said supply voltage from said control circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A batteryless tire pressure monitoring system comprising:
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a reading module for transmitting a microwave energy signal;
a sensor disposed in a wheel for sensing at least one pressure-related parameter of said tire;
a transceiver coupled to said sensor for receiving said microwave energy signal and for transmitting a modulated tire pressure-related signal; and
a control circuit coupled to said transceiver and said sensor for demodulating said microwave energy signal and for converting at least a portion of said microwave energy signal to a supply voltage for providing power to said sensor;
wherein said sensor senses said at least one pressure-related parameter of said tire in response to receiving said supply voltage from said control circuit and said transceiver transmits said tire-pressure related signal containing said sensed pressure-related parameter to said reading module. - View Dependent Claims (10, 11, 12)
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13. A method for providing electrical energy to a tire pressure sensing device including a sensor for sensing at least one pressure related parameter of a vehicle tire, the method comprising the steps of:
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transmitting a modulated microwave energy signal to said tire pressure sensing device;
converting at least a portion of said modulated microwave energy signal to a supply voltage; and
applying said supply voltage to said sensor;
determining a pressure-related parameter; and
transmitting said pressure-related parameter to a reading module. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification