Transmitter of tire condition monitoring apparatus and tire condition monitoring apparatus
First Claim
1. A transmitter in an apparatus for monitoring a condition of a tire of a vehicle, wherein the transmitter is provided in the tire, the transmitter comprising:
- a measuring device for measuring a condition of the tire;
a transmission circuit, wherein the transmission circuit generates a transmission signal containing data that represents the measured tire condition;
a valve stem, wherein the tire is filled with air through the valve stem, and wherein the valve stem has a magnetic piece;
a magnetizing member for magnetizing the magnetic piece, wherein the position of the magnetizing member relative to the magnetic piece can be changed, and wherein a magnetized state of the magnetic piece varies according to the position of the magnetizing member relative to the magnetic piece; and
a magnetized state detecting device for detecting the magnetized state of the magnetic piece, wherein the transmission signal contains data based on the detected magnetized state in addition to the tire condition data.
1 Assignment
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Accused Products
Abstract
A transmitter in an apparatus for monitoring a condition of a tire includes a pressure sensor, a transmission circuit, a valve stem, an MR sensor, and a magnetic ring. The valve stem has magnetic pieces. The pressure sensor measures the air pressure in the interior of the tire. The transmission circuit generates a transmission signal containing data that represents the measured air pressure. The magnetic ring magnetizes the magnetic pieces. The position of the magnetic ring relative to the magnetic pieces can be changed. A magnetized state of the magnetic pieces varies according to the position of the magnetic ring relative to the magnetic pieces. The MR sensor detects the magnetized state of the magnetic piece. The transmission signal contains data based on the detected magnetized state in addition to the tire condition data. This is capable of identifying the tire mount position.
15 Citations
14 Claims
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1. A transmitter in an apparatus for monitoring a condition of a tire of a vehicle, wherein the transmitter is provided in the tire, the transmitter comprising:
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a measuring device for measuring a condition of the tire;
a transmission circuit, wherein the transmission circuit generates a transmission signal containing data that represents the measured tire condition;
a valve stem, wherein the tire is filled with air through the valve stem, and wherein the valve stem has a magnetic piece;
a magnetizing member for magnetizing the magnetic piece, wherein the position of the magnetizing member relative to the magnetic piece can be changed, and wherein a magnetized state of the magnetic piece varies according to the position of the magnetizing member relative to the magnetic piece; and
a magnetized state detecting device for detecting the magnetized state of the magnetic piece, wherein the transmission signal contains data based on the detected magnetized state in addition to the tire condition data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for monitoring conditions of a plurality of tires of a vehicle, the apparatus comprising:
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a plurality of transmitters each provided in one of the tires, wherein each transmitter includes;
a measuring device for measuring a condition of the corresponding tire;
a transmission circuit, wherein the transmission circuit generates a transmission signal containing data that represents the measured tire condition;
a valve stem, wherein the tire is filled with air through the valve stem, and wherein the valve stem has a magnetic piece;
a magnetizing member for magnetizing the magnetic piece, wherein the position of the magnetizing member relative to the magnetic piece can be changed, and wherein a magnetized state of the magnetic piece varies according to the position of the magnetizing member relative to the magnetic piece; and
a magnetized state detecting device for detecting the magnetized state of the magnetic piece, wherein the transmission signal contains data based on the detected magnetized state in addition to the tire condition data, and a receiver for receiving the transmission signals that are wirelessly transmitted by the transmitters, wherein, when receiving the transmission signal from any one of the transmitters, the receiver determines the position of the tire in which the transmitter that has transmitted the signal is provided based on the received transmission signal. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification