Tire pressure monitoring system
AssigneeDenso Corporation
InventorNoriaki Okada
Life of this patent
Estimating the term…
Abstract
A sensor transceiver transitions into a first state that is capable of receiving RF waves intermittently. Upon starting to receive a burst signal on RF waves from a vehicle-body system under the first state, the sensor transceiver transitions into a second state that is capable of receiving RF waves continuously. Upon receiving a request signal on RF waves from the vehicle-body system under the second state, the sensor transceiver transmits data on tire pressure to the vehicle-body system.
Claims8
A tire pressure monitoring system applied to a vehicle having a vehicle body which a plurality of wheels are attached to, the plurality of wheels being equipped with and respectively corresponding to a plurality of tires,
- the tire pressure monitoring system comprising:
- a plurality of sensor transceivers provided to and respectively corresponding to the plurality of wheels;
- and
- a vehicle-body system provided in the vehicle body,
- each of the sensor transceivers comprising:
- a sensing unit configured to detect a tire pressure of a tire of a corresponding wheel among the plurality of wheels;
- a first control unit configured to prepare a frame that stores data regarding the tire pressure;
- a first transmission unit configured to transmit the frame prepared by the first control unit on RF waves;
- and
- a first reception unit configured to receive RF waves,
- the vehicle-body system comprising:
- a second reception unit configured to receive a frame transmitted from each of the sensor transceivers;
- a second control unit configured to detect a respective tire pressure of each of the tires of the plurality of wheels based on the received frame;
- and
- a second transmission unit configured to transmit RF waves to be received by the first reception unit,
- wherein in the vehicle-body system,
- in response to detecting that there is a possibility that the vehicle starts to run, the second control unit outputs, on RF waves, a burst signal and then a request signal to each of the sensor transceivers,
- the burst signal causing the first reception unit of each of the sensor transceivers to transition into a state that is capable of continuously receiving RF waves,
- the request signal requesting each of the sensor transceivers to transmit the frame,
- wherein, in each of the sensor transceivers,
- the first control unit sets the first reception unit to a standby state that is capable of intermittently receiving RF waves,
- in response to the first reception unit receiving the burst signal under the standby state, the first control unit causes the first reception unit to transition into the state capable of continuously receiving RF waves to receive the request signal, and
- in response to the first reception unit receiving the request signal, the first control unit transmits the frame as a response to the request signal.
Dependencies are inferred from the claim text.