Tire pressure sensing system
First Claim
1. A tire pressure monitoring system, comprising:
- a sensor mounted within a tire that triggers a signal when tire pressure reaches a level outside predetermined parameters;
a receiver mounted in operative proximity to said sensor at a location outside of said tire, said receiver being electromagnetically coupled to said sensor when said sensor is activated in response to said tire pressure reaching the level outside predetermined parameters, said receiver including at least a first inductor and a second inductor, said first inductor and said second inductor being positioned relative to one another so that upon creating an electromagnetic coupling between said first inductor and said second inductor, feedback from said coupling is one of either a substantially zero feedback and a negative feedback; and
an indicator coupled to said receiver that generates a signal when said tire pressure reaches the level outside predetermined parameters.
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Accused Products
Abstract
A system is provided for monitoring tire pressure which includes a sensor mounted within a tire that triggers a train of pulses when tire pressure reaches a level outside predetermined parameters. The system also includes a receiver mounted in operative proximity to the sensor at a location exterior to the tire. The receiver is electromagnetically coupled to the sensor and the sensor is activated in response to tire pressure reaching a level outside predetermined parameters. Also provided is an indicator which is coupled to the receiver, which signals when the tire pressure reaches a level outside predetermined parameters. The sensor is mounted within the tire that senses tire air pressure. The receiver is mounted within operative proximity to the sensor and at a location external to the tire and is electromagnetically coupled to the sensor to generate signals dispersed by the sensor that are indicative of tire air pressure sensed by the sensor. The tire pressure indicator is coupled to the receiver that converts tire air pressure signals generated by the receiver into a driver readable output.
72 Citations
35 Claims
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1. A tire pressure monitoring system, comprising:
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a sensor mounted within a tire that triggers a signal when tire pressure reaches a level outside predetermined parameters; a receiver mounted in operative proximity to said sensor at a location outside of said tire, said receiver being electromagnetically coupled to said sensor when said sensor is activated in response to said tire pressure reaching the level outside predetermined parameters, said receiver including at least a first inductor and a second inductor, said first inductor and said second inductor being positioned relative to one another so that upon creating an electromagnetic coupling between said first inductor and said second inductor, feedback from said coupling is one of either a substantially zero feedback and a negative feedback; and an indicator coupled to said receiver that generates a signal when said tire pressure reaches the level outside predetermined parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A tire pressure monitoring system, comprising:
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a sensor mounted within a tire that triggers a signal when tire pressure reaches a level outside predetermined parameters; a receiver mounted in operative proximity to said sensor at a location outside of said tire, said receiver being electromagnetically coupled to said sensor when said sensor is activated in response to said tire pressure reaching the level outside predetermined parameters, wherein said sensor reverses a sign of a feedback in said receiver when said sensor becomes conductive and is placed in an interference location with respect to a first inductor and a second inductor positioned within said receiver; and an indicator coupled to said receiver that generates a signal when said tire pressure reaches the level outside predetermined parameters.
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17. A tire pressure monitoring system, comprising:
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a sensor mounted within a tire that senses tire air pressure; a receiver mounted within operative proximity to said sensor and at a location external to said tire that is electromagnetically coupled to said sensor to generate signals indicative of tire air pressure sensed by said sensor, said receiver including a first inductor and a second inductor, said first inductor and said second inductor being positioned relative to one another so that mutual interaction between said first inductor and said second inductor creates one of either a substantially zero feedback and a negative feedback; and a tire air pressure indicator coupled to said receiver that converts tire air pressure signals generated by said receiver into a driver readable output. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A tire pressure monitoring system, comprising:
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a sensor mounted within a tire that senses tire air pressure, said sensor including a capacitor having a capacitance that varies in proportion to the tire pressure, wherein said capacitor comprises a thin wall cylindrical capacitor having a first end isolated from said tire air and a second end open to said tire air, said capacitor being filled with an electrically conductive material that traps a volume of air between said first end and said material, said electrically conductive material compressing and decompressing said volume of air in direct relation to said tire air pressure; a receiver mounted within operative proximity to said sensor and at a location external to said tire that is electromagnetically coupled to said sensor to generate signals indicative of tire air pressure sensed by said sensor; and a tire air pressure indicator coupled to said receiver that converts tire air pressure signals generated by said receiver into a driver readable output.
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26. A tire pressure monitoring system, comprising:
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a passive sensor circuit mounted within a tire that senses tire air pressure; a receiver mounted within operative proximity to said passive sensor circuit and at a location external to said tire, said receiver being electromagnetically coupled to said pressure sensor circuit to generate signals indicative of tire air pressure sensed by said passive sensor circuit, said receiver including at least a first inductor and a second inductor, said first inductor and said second inductor being selectively positioned relative to one another so that upon creating an electromagnetic coupling between said first inductor and said second inductor, feedback from said coupling is one of either a substantially zero feedback and a negative feedback; and a tire pressure status indicator coupled to said receiver that converts the signals generated by said receiver into a tire pressure status output. - View Dependent Claims (27, 28)
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29. A tire pressure monitoring system for monitoring the pressure of at least one tire of a vehicle, said tire pressure monitoring system comprising:
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a sensor mounted within the at least one tire of the vehicle, said sensor operable to sense tire pressure within the at least one tire; a receiver mounted on the vehicle at a location external of the tire and within operative proximity to said sensor, said receiver operable to generate a signal indicative of the tire pressure sensed by said sensor, said receiver including a first inductor and a second inductor having a mutual coefficient β and
an amplifier having a gain K, where the mutual coefficient β
varies with the placement of said first inductor relative to said second inductor and with an inductance of said first inductor and said second inductor, said first inductor and said second inductor being positioned relative to one another such that Kβ
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1; anda tire pressure status indicator in communication with said receiver operable to display a tire pressure status based on the signal generated by said receiver. - View Dependent Claims (30, 31)
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32. A monitoring system for monitoring a first parameter, said monitoring system comprising:
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a sensor positioned at a first location, said sensor operable to sense the first parameter; a receiver positioned at a second location remote from said first location and within operative proximity to said sensor, said receiver operable to generate signals indicative of the first parameter, said receiver including a first inductor and a second inductor, said first inductor and said second inductor being positioned relative to one another so that upon creating an electromagnetic coupling between said first inductor and said second inductor, feedback from said coupling is one of either a substantially zero feedback and a negative feedback; and an indicator in communication with said receiver to provide the first parameter to a user. - View Dependent Claims (33, 34, 35)
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Specification