Abstract: A tire valve registration system including: a plurality of tire valves that are respectively installed on a plurality of tires and on a spare tire and that each transmit a radio signal that includes a valve ID and data on tire air pressure; and a receiver that is provided to a vehicle body and that is capable of receiving the radio signal from each of the plurality of tire valves. The system includes: a spare tire ID collecting unit that collects, as at least one spare tire candidate ID, the valve ID of at least one radio signal received by the receiver; and a spare tire ID confirming unit that confirms the ID of the spare tire.

Abstract: A tire position determination system is provided with: a plurality of tire air pressure transmitters each capable of transmitting a first radio signal including air pressure data and a tire ID; a plurality of axle rotation detection units each generating axle rotation information; and a receiver mounted to a vehicle body and capable of receiving the first radio signal. Each of the plurality of tire air pressure transmitters includes a specific position detection unit capable of detecting the arrival of the tire air pressure transmitter at a specific position on a trajectory of rotation of the tire, and a transmission control unit that, based on a result of detection, generates a second radio signal including data indicating the arrival of the tire air pressure transmitter at the specific position on the trajectory of rotation of the tire and the ID. The receiver includes a position determination unit that determines a tire position of the plurality of tires based on the second radio signal.

Abstract: A tire position determination system includes a position determination unit that determines a tire position by obtaining axle rotation information when each of tire pressure transmitters reaches a specific position on a tire rotation path of a corresponding tire and specifying a tire that rotates in synchronism with the axle rotation information of each axle. A cycle calculator calculates a rotation cycle of each axle based on the axle rotation information. A validity determination unit determines validity of accuracy of gravity sampling based on the rotation cycle, a gravity sampling interval time of a gravitational component acting on each tire pressure transmitter, and a gravity sampling frequency in the rotation cycle. The position determination unit determines the tire position based on a determination result of the validity determination unit.

Abstract: A tire position registration system includes a receiver that estimates, from a data group of axle rotation information of each of axles obtained for each valve ID, a parent population of the axle rotation information of each of the axles. The receiver sets a synchronized wheel tolerance region, which functions as an index for determining validity of the corresponding axle rotation information, for each parent population based on a population mean that is a mean of the parent population. The receiver specifies the tire position by determining whether or not the axle rotation information obtained for each valve ID is included in the synchronized wheel tolerance region of the corresponding parent population and specifying the axle rotating in synchronization with the tire corresponding to the valve ID.

Abstract: A tire valve registration system including: a plurality of tire valves that are respectively installed on a plurality of tires and on a spare tire and that each transmit a radio signal that includes a valve ID and data on tire air pressure; and a receiver that is provided to a vehicle body and that is capable of receiving the radio signal from each of the plurality of tire valves. The system includes: a spare tire ID collecting unit that collects, as at least one spare tire candidate ID, the valve ID of at least one radio signal received by the receiver; and a spare tire ID confirming unit that confirms the ID of the spare tire.

Abstract: A tire position determination system is provided with: a plurality of tire air pressure transmitters respectively attached to a plurality of tires and each capable of transmitting a first radio wave signal including air pressure data and a tire ID; a plurality of axle rotation detection units that are respectively installed in association with a plurality of axles and that generate axle rotation information by detecting rotation of a corresponding one of the plurality of axles; and a receiver mounted to a vehicle body and capable of receiving the first radio wave signal from each of the plurality of tire air pressure transmitters.

Abstract: A tire position determination system includes a position determination unit that determines a tire position by obtaining axle rotation information when each of tire pressure transmitters reaches a specific position on a tire rotation path of a corresponding tire and specifying a tire that rotates in synchronism with the axle rotation information of each axle. A cycle calculator calculates a rotation cycle of each axle based on the axle rotation information. A validity determination unit determines validity of accuracy of gravity sampling based on the rotation cycle, a gravity sampling interval time of a gravitational component acting on each tire pressure transmitter, and a gravity sampling frequency in the rotation cycle. The position determination unit determines the tire position based on a determination result of the validity determination unit.

Abstract: A tire position determination system is provided with: a plurality of tire air pressure transmitters each capable of transmitting a first radio signal including air pressure data and a tire ID; a plurality of axle rotation detection units each generating axle rotation information; and a receiver mounted to a vehicle body and capable of receiving the first radio signal. Each of the plurality of tire air pressure transmitters includes a specific position detection unit capable of detecting the arrival of the tire air pressure transmitter at a specific position on a trajectory of rotation of the tire, and a transmission control unit that, based on a result of detection, generates a second radio signal including data indicating the arrival of the tire air pressure transmitter at the specific position on the trajectory of rotation of the tire and the ID. The receiver includes a position determination unit that determines a tire position of the plurality of tires based on the second radio signal.

Abstract: A tire identification code registration system for use with tire pressure detectors and a tire pressure monitoring system (TMPS) receiver. Each tire pressure detector, which includes a unique tire identification code, is coupled to a tire to detect the pressure of the tire and transmit a tire pressure signal. The receiver receives the tire pressure signal and monitors the pressure of the tire. The tire identification code registration system includes a storage manager that stores, in a memory, tire identification codes included in wireless signals received during a predetermined storage period as candidate tire identification codes. A registration unit registers the candidate tire identification codes in the memory as formal tire identification codes after the storage performed by the storage manager when the number of the candidate tire identification codes in the memory is equal to a predetermined storage number.

Abstract: An antenna device includes an antenna. The antenna includes a plurality of plate-like legs, coupled to a base plate, and a plurality of plate-like arms, supported by the legs. Adjacent ones of the arms are continuous with each other. At least two of the legs have thicknesses in different thickness-wise directions.

Abstract: An input apparatus for a vehicle, the apparatus being used for operation input to various vehicular electronic devices, sets position input permission areas on a two-dimensional operation surface of an operation input device discretely by control of a main controller. In control modes of a reaction force, a guide input mode where position indication operations to the areas on the operation surface by the operation input device are guided along unique paths defined in the respective area and an arbitrary mode where the position indication operations are not guided but performed freely can be changed. The guide input mode is set at least during a vehicle travel.

Abstract: A tire position determination system including tire pressure detectors respectively attached to tires, axle rotation detectors respectively corresponding to axles, and a receiver located on a vehicle body. Each tire pressure detector detects when reaching a specific position on a rotation trajectory of the corresponding tire and transmits a radio wave including the tire ID. An ID temporary registration unit temporarily registers tire IDs to the memory that are received from the tire pressure detectors existing in a signal receivable area of the receiver. An ID registration acquires axle rotation information from each axle rotation detector whenever receiving the radio wave from each tire pressure detector, and specifies a tire ID of a tire that rotates in synchronism with rotation of each axle to determine the tire position of the tire.

Abstract: Each tire pressure detector detects a characteristic point in a detection signal of an acceleration sensor indicating that the tire pressure detector is located at a certain rotation position. When detecting the characteristic point, the tire pressure detector transmits a notification signal including the detector ID. Whenever a receiver receives a notification signal, the receiver acquires an axle rotation amount of a representative wheel and stores the axle rotation amount in a memory in association with the detector ID in the notification signal. After acquiring axle rotation amounts associated with the detector IDs of all of the tire pressure detectors, the receiver determines mounting positions of tires from the angle each tire pressure detector rotated and the angle each axle rotated between a first determination timing and a second determination timing.

Abstract: A multifunction receiver shared by an electronic key system and a tire pressure monitoring system. The electronic key system verifies an electronic key with a verification control unit of a vehicle body through wireless communication, and the tire pressure monitoring system monitors tire pressure of a tire by transmitting a tire pressure signal from a sensor arranged on the tire to the vehicle body through wireless communication. The multifunction receiver includes a trigger signal generation unit that generates a trigger signal when a level shift occurs in at least one of a first operation mode switch signal and a second operation mode switch signal from the verification control unit. A mode setting unit sets an operation mode based on the first operation mode switch signal and the second operation mode switch signal in response to the trigger signal received from the trigger signal generation unit.

Abstract: A tire identification code registration system for use with tire pressure detectors and a tire pressure monitoring system (TMPS) receiver. Each tire pressure detector, which includes a unique tire identification code, is coupled to a tire to detect the pressure of the tire and transmit a tire pressure signal. The receiver receives the tire pressure signal and monitors the pressure of the tire. The tire identification code registration system includes a storage manager that stores, in a memory, tire identification codes included in wireless signals received during a predetermined storage period as candidate tire identification codes. A registration unit registers the candidate tire identification codes in the memory as formal tire identification codes after the storage performed by the storage manager when the number of the candidate tire identification codes in the memory is equal to a predetermined storage number.

Abstract: A tire position determination system including tire pressure detectors respectively attached to tires, axle rotation detectors respectively corresponding to axles, and a receiver located on a vehicle body. Each tire pressure detector detects when reaching a specific position on a rotation trajectory of the corresponding tire and transmits a radio wave including the tire ID. An ID temporary registration unit temporarily registers tire IDs to the memory that are received from the tire pressure detectors existing in a signal receivable area of the receiver. An ID registration acquires axle rotation information from each axle rotation detector whenever receiving the radio wave from each tire pressure detector, and specifies a tire ID of a tire that rotates in synchronism with rotation of each axle to determine the tire position of the tire.

Abstract: Each tire pressure detector detects a characteristic point in a detection signal of an acceleration sensor indicating that the tire pressure detector is located at a certain rotation position. When detecting the characteristic point, the tire pressure detector transmits a notification signal including the detector ID. Whenever a receiver receives a notification signal, the receiver acquires an axle rotation amount of a representative wheel and stores the axle rotation amount in a memory in association with the detector ID in the notification signal. After acquiring axle rotation amounts associated with the detector IDs of all of the tire pressure detectors, the receiver determines mounting positions of tires from the angle each tire pressure detector rotated and the angle each axle rotated between a first determination timing and a second determination timing.

Abstract: An antenna device includes an antenna. The antenna includes a plurality of plate-like legs, coupled to a base plate, and a plurality of plate-like arms, supported by the legs. Adjacent ones of the arms are continuous with each other. At least two of the legs have thicknesses in different thickness-wise directions.

Abstract: A multifunction receiver shared by an electronic key system and a tire pressure monitoring system. The electronic key system verifies an electronic key with a verification control unit of a vehicle body through wireless communication, and the tire pressure monitoring system monitors tire pressure of a tire by transmitting a tire pressure signal from a sensor arranged on the tire to the vehicle body through wireless communication. The multifunction receiver includes a trigger signal generation unit that generates a trigger signal when a level shift occurs in at least one of a first operation mode switch signal and a second operation mode switch signal from the verification control unit. A mode setting unit sets an operation mode based on the first operation mode switch signal and the second operation mode switch signal in response to the trigger signal received from the trigger signal generation unit.

Abstract: A valve ID registration system includes a sudden pressure decrease detector that detects a sudden pressure decrease in the tire and a transmission unit that transmits a valve signal. When the detector detects a sudden pressure decrease, the transmission unit transmits the valve signal, which includes sudden pressure decrease information, with more frames than normal. A sudden pressure decrease monitoring unit monitors the received valve signal for sudden pressure decrease information. After the valve signal including the sudden pressure decrease information is received with more frames than normal, when a new valve signal is received including the same valve ID as that in the valve signal including the sudden pressure decrease information and the new valve signal indicates an increase in air pressure, a registration unit determines that the valve signals were transmitted from the tire of the vehicle and registers the valve ID.