Tire air pressure detection system
First Claim
1. A tire air pressure detection system comprising:
- a transmitter provided at each of a plurality of wheels provided with tires, having a sensing unit for detecting data relating to air pressure of a corresponding tire, and sending out a detection signal of that sensing unit anda receiver provided at a chassis side and provided with a first controller receiving detection signals and finding the air pressures of the tires provided at the plurality of wheels based on the detection signals, whereineach transmitter has a strong electric field detecting function unit for detecting a strong electric field or strong radio interference and a second controller for receiving as input the detection signal of the sensing unit and sending a transmission signal toward the receiver at predetermined transmission timings, andthe second controller is operative to stop a detection signal from being transmitted to the receiver at a current transmission timing when the strong electric field detecting function unit detects a strong electric field or strong radio interference in the interval from a previous communication timing to a current communication timing.
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Accused Products
Abstract
A tire air pressure detection system, able to prevent a strong electric field or strong radio interference from affecting transmitters and causing mistaken data relating to tire air pressure to be sent out and a driver from being mistakenly warned, having transmitters with controllers, detection circuits, and sensing units and a receiver, the controllers stopping detection signals from being sent to the receiver at current transmission timings when the detection circuits detect a strong electric field or radio interference in the interval from a previous communication timing to a current communication timing, whereby even if the strong electric field or radio interference affects detection signals from sensors provided at the sensing units, the transmitters can be prevented from sending out mistaken data relating to tire air pressure.
19 Citations
10 Claims
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1. A tire air pressure detection system comprising:
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a transmitter provided at each of a plurality of wheels provided with tires, having a sensing unit for detecting data relating to air pressure of a corresponding tire, and sending out a detection signal of that sensing unit and a receiver provided at a chassis side and provided with a first controller receiving detection signals and finding the air pressures of the tires provided at the plurality of wheels based on the detection signals, wherein each transmitter has a strong electric field detecting function unit for detecting a strong electric field or strong radio interference and a second controller for receiving as input the detection signal of the sensing unit and sending a transmission signal toward the receiver at predetermined transmission timings, and the second controller is operative to stop a detection signal from being transmitted to the receiver at a current transmission timing when the strong electric field detecting function unit detects a strong electric field or strong radio interference in the interval from a previous communication timing to a current communication timing. - View Dependent Claims (2, 3, 4, 7, 9)
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5. A tire air pressure detection system comprising:
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a transmitter provided at each of a plurality of wheels provided with tires, having a sensing unit for detecting data relating to air pressure of a corresponding tire, and sending out a detection signal of that sensing unit and a receiver provided at a chassis side and provided with a first controller receiving detection signals and finding the air pressures of the tires provided at the plurality of wheels based on the detection signals, wherein each transmitter has a strong electric field detecting function unit for detecting a strong electric field or radio interference and a second controller for receiving as input a detection signal of a sensing unit and sending a transmission signal toward the receiver at a predetermined transmission timing, and each second controller is operative to send dummy data different from a detection signal to the receiver at a current transmission timing when the strong electric field detecting function unit detects a strong electric field or radio interference in the interval from the previous communication timing to the current communication timing. - View Dependent Claims (6, 8, 10)
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Specification