Abstract: A tire mounting position detection system measures a first signal strength which is the strength of a radio signal received by a first receiver (R1) for each transmitter, measures a second signal strength which is the strength of the radio signal received by a second receiver (R2) for each transmitter, and calculates an strength ratio which is a ratio using the first signal strength and the second signal strength for each transmitter. The tire mounting position detection system detects a wheel position where a tire equipped with a transmitter is mounted on the basis of the first signal strength, the second signal strength and a strength ratio for each transmitter.

Abstract: A processing device (120) of a tire state detection system (100) is provided with an acceleration data acquisition unit (123) for acquiring the acceleration data detected by an acceleration sensor (111) at every predetermined acquisition interval, an acceleration data extraction unit (125) for extracting the maximum acceleration data indicating at least the maximum acceleration and the intermediate acceleration data indicating the intermediate acceleration excluding the minimum acceleration data indicating the minimum acceleration from 3 or more acceleration data acquired sequentially, and a calculation unit (127) for executing an calculation using the extracted intermediate acceleration data.

Abstract: A circumferential main groove detection method for detecting, by a computer, a position of a circumferential main groove of a tire from 3D data of a tread surface of the tire, the method including: a cross-sectional data extracting step of extracting, at a plurality of places in a tire circumferential direction, cross-sectional data of the tread surface along one direction inclined with respect to the tire circumferential direction; an area dividing step of dividing the cross-sectional data respectively into a plurality of areas along one direction; an evaluating step of evaluating relative unevenness in the areas; and a circumferential main groove identifying step of overlaying evaluation results of divided areas at an identical position in the tire circumferential direction and identifying the position of the tire circumferential main groove.

Abstract: A tire mounting position detection system measures a first signal strength which is the strength of a radio signal received by a first receiver (R1) for each transmitter, measures a second signal strength which is the strength of the radio signal received by a second receiver (R2) for each transmitter, and calculates an strength ratio which is a ratio using the first signal strength and the second signal strength for each transmitter. The tire mounting position detection system detects a wheel position where a tire equipped with a transmitter is mounted on the basis of the first signal strength, the second signal strength and a strength ratio for each transmitter.

Abstract: A tire mounting state detection system (100) is provided with a vehicle configuration holding unit (230) holding a vehicle configuration including the number of wheels of a vehicle (10); a transmitter number detection unit (250) detecting the number of transmitters based on a radio signal received by a receiving unit; a state detection unit (260) detecting whether or not the number of transmitters exceeds or is short the number of wheels based on the number of wheels based on the vehicle configuration and the number of transmitters detected; and an output unit (270) outputting that the state of the transmitter is abnormal when it is determined that the number of transmitters exceeds or is short the number of wheels.

Abstract: A processing device (120) of a tire state detection system (100) is provided with an acceleration data acquisition unit (123) for acquiring the acceleration data detected by an acceleration sensor (111) at every predetermined acquisition interval, an acceleration data extraction unit (125) for extracting the maximum acceleration data indicating at least the maximum acceleration and the intermediate acceleration data indicating the intermediate acceleration excluding the minimum acceleration data indicating the minimum acceleration from 3 or more acceleration data acquired sequentially, and a calculation unit (127) for executing an calculation using the extracted intermediate acceleration data.

Abstract: The tire mount position detection system measures a first signal intensity, which is intensity of a radio signal received by a first receiver (R1), and a second signal intensity, which is intensity of a radio signal received by a second receiver (R2), for each transmitter, and calculates a difference of the first signal intensity and the second signal intensity and a total value of the first signal intensity and the second signal intensity for each transmitter. The tire mount position detection system detects the wheel position to which a tire having the transmitter is mounted, based on the difference and the total value of each transmitter.

Abstract: A tire mount position detection system measures a first signal intensity, which is intensity of a radio signal received by a first receiver (R1), and a second signal intensity, which is intensity of a radio signal received by a second receiver (R2), for each transmitter, and calculates a total value of the first signal intensity and the second signal intensity for each transmitter. The tire mount position detection system detects the wheel position to which a tire having the transmitter is mounted, based on the first signal intensity, the second signal intensity, and the total value of each transmitter.

Abstract: A tire mount position detection system measures a first signal intensity, which is intensity of a radio signal received by a first receiver (R1), and a second signal intensity, which is intensity of a radio signal received by a second receiver (R2), for each transmitter, and calculates a total value of the first signal intensity and the second signal intensity for each transmitter. The tire mount position detection system detects the wheel position to which a tire having the transmitter is mounted, based on the first signal intensity, the second signal intensity, and the total value of each transmitter.