Tire monitoring system and method
First Claim
1. A monitoring sensor, comprising:
- a sensor configured to generate a signal indicative of (i) rotation of a tire, and (ii) a measured gas-flow produced vibration of the tire; and
a controller configured to determine, based on the signal, a filling state of the tire while the tire is in a non-rotating state during which the tire is being inflated or deflated, andwherein the determining includes;
determining an environmental condition based on a variance value associated with the signal; and
comparing the determined variance value to a threshold value to determine the filling state.
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Accused Products
Abstract
Sensor and method for determining operating states associated with one or more tires. The operating state of the tire can be determined based on one or more measures environmental conditions of the tire(s). For example, a controller can be configured to determine a change in one or more environmental conditions, including determining, for example, a rate-of-change value, a variance value, a standard deviation, or the like. The rate-of-change, variance, and/or standard deviation values can be compared to one or more threshold values to determine the operating state(s) associated with the tire(s). The environmental condition can include, for example, acceleration of the tire, pressure of the tire, and/or temperature of the tire. The operating state can be, for example, a filling state indicative of the tire being inflating, and/or a drive state indicative of the tire rotating about its axle.
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Citations
19 Claims
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1. A monitoring sensor, comprising:
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a sensor configured to generate a signal indicative of (i) rotation of a tire, and (ii) a measured gas-flow produced vibration of the tire; and a controller configured to determine, based on the signal, a filling state of the tire while the tire is in a non-rotating state during which the tire is being inflated or deflated, and wherein the determining includes; determining an environmental condition based on a variance value associated with the signal; and comparing the determined variance value to a threshold value to determine the filling state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A monitoring method, comprising:
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generating a signal indicative of (i) rotation of a tire, and (ii) a gas-flow produced vibration of the tire; determining a variance of the gas-flow produced vibration based on the signal; comparing the variance to a threshold value; and determine a filling state of the tire based on the comparison while the tire is in a non-rotating state during which the tire is inflated or deflated. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A monitoring device, comprising:
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a sensor configured to generate an acceleration signal indicative of (i) rotation of the tire, and (ii) a measured gas-flow produced vibration of the tire; and a controller configured to determine a rate-of-change value or a variance value based on the acceleration signal, and a filling state of the tire while the tire is in a non-rotating state during which the tire is inflated or deflated based on the determined rate-of-change value or the variance value. - View Dependent Claims (18, 19)
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Specification