Wheel condition determination apparatus
First Claim
1. A wheel condition determination apparatus which determines a condition of a wheel provided in a vehicle, comprising:
- a primary sensor unit, provided in the wheel, which includes a first transceiver, a first detector that detects a first predetermined parameter indicating the condition of the wheel, and an operation-mode controller; and
a secondary sensor unit, provided in the wheel, which includes a second transceiver, and a second detector that detects a second predetermined parameter indicating the condition of the wheel, which is different from the first predetermined parameter, wherein the operation mode controller instructs the first transceiver to generate a mode-setting signal to set an operation mode of the secondary sensor unit to one of an active mode and a sleep mode, based on the detected first predetermined parameter.
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Accused Products
Abstract
A wheel condition determination apparatus includes a primary sensor unit and a secondary sensor unit that are provided in the wheels of a vehicle. The primary sensor unit detects a predetermined parameter indicating the condition of the wheel and controls the operation mode of the secondary sensor unit in accordance with the detected predetermined parameter. The secondary sensor unit detects a predetermined parameter indicating the condition of the wheel that is different from the predetermined parameter detected by the primary sensor unit. The operation mode of the secondary sensor unit may be changed between an active mode and a sleep mode. In the sleep mode, detection of the wheel condition may be suspended or performed less frequently than as the active mode.
19 Citations
8 Claims
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1. A wheel condition determination apparatus which determines a condition of a wheel provided in a vehicle, comprising:
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a primary sensor unit, provided in the wheel, which includes a first transceiver, a first detector that detects a first predetermined parameter indicating the condition of the wheel, and an operation-mode controller; and
a secondary sensor unit, provided in the wheel, which includes a second transceiver, and a second detector that detects a second predetermined parameter indicating the condition of the wheel, which is different from the first predetermined parameter, wherein the operation mode controller instructs the first transceiver to generate a mode-setting signal to set an operation mode of the secondary sensor unit to one of an active mode and a sleep mode, based on the detected first predetermined parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of determining a condition of a wheel provided in a vehicle, comprising:
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detecting a first predetermined parameter indicating the condition of the wheel using a first detector provided in a primary sensor unit provided in a wheel;
generating a mode-setting signal in a first transceiver provided in the primary sensor unit, based on the detected first predetermined parameter; and
transmitting the mode-setting signal to a secondary sensor unit provided in the wheel to set an operation mode of the secondary sensor unit to one of an active mode and a sleep mode, based on the first predetermined parameter.
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Specification