Determination of wheel sensor position using shock sensors and a wireless solution
First Claim
1. A tire monitor configured for mounting on a vehicle, the tire monitor comprising:
- a first shock sensor to produce a first motion signal;
a second shock sensor to produce a second motion signal; and
a control circuit coupled to the first shock sensor and the second shock sensor and configured to determine right side-left side position information for the tire monitor based on a lag-lead relationship of the first motion signal and the second motion signal.
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Accused Products
Abstract
A remote tire monitor system includes a control unit and a plurality of tire monitors mountable on respective wheels of a vehicle to transmit radio signals to the control unit. The tire monitors each include a pair of motion sensors such as shock sensors and a control circuit configured to determine position information for the respective tire monitor based on first and second shock sensor signals from the pair of shock sensors. The shock sensors produce an output voltage proportional to a change in applied force. Therefore, the offset created by centrifugal force in previously used accelerometers is absent, simplifying design of the tire monitors.
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Citations
17 Claims
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1. A tire monitor configured for mounting on a vehicle, the tire monitor comprising:
a first shock sensor to produce a first motion signal;
a second shock sensor to produce a second motion signal; and
a control circuit coupled to the first shock sensor and the second shock sensor and configured to determine right side-left side position information for the tire monitor based on a lag-lead relationship of the first motion signal and the second motion signal.- View Dependent Claims (2, 3, 4, 5)
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6. A remote tire monitor system comprising:
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a control unit; and a plurality of tire monitors mountable on respective wheels of a vehicle to transmit radio signals to the control unit, the respective tire monitors each including a pair of shock sensors to produce first and second sensor signals which are proportional to a change in force applied to the sensors, and a control circuit configured to determine right side-left side position information for the respective tire monitor based on the first and second sensor signals from the pair of sensors and wherein transmitted radio signals include temperature information and the control circuit operates in response to compensation software, the control circuit in conjunction with the compensation software configured to compensate relative strength of the transmitted radio signals using the temperature information. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A tire monitor configured for mounting on a vehicle, the tire monitor comprising:
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a first shock sensor to produce a first motion signal; a second shock sensor to produce a second motion signal; a control circuit coupled to the first shock sensor and the second shock sensor to determine right side-left side position information for the tire monitor based on the first motion signal and the second motion signal; a radio circuit coupled to the control circuit to transmit radio signals based at least in part on a tire condition signal; and at least one temperature sensor electrically coupled to the radio circuit, the transmitted radio signals including temperature information, and the control circuit operating in response to compensation software, the control circuit in conjunction with the compensation software configured to compensate the relative strength of the transmitted radio signals using the temperature information. - View Dependent Claims (15, 16, 17)
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Specification