公开(公告)号：US20130222128A1

公开(公告)日：2013-08-29

申请号：US13772878

申请日：2013-02-21

Applicant: DENSO CORPORATION

Inventor： Nobuya Watabe ,  Masashi Mori ,  Noriaki Okada ,  Takatoshi Sekizawa

IPC: B60C23/04

CPC classification number: B60C23/0416 ,  B60C23/0488 ,  B60C23/0489

Abstract: In a tire pressure detecting apparatus, a receiver stores wheel positions detected by a previous wheel position detection as previous wheel positions. When an ignition switch is turned on and until wheel positions are newly specified by a current wheel position detection, the receiver permits an indicator to indicate tire pressure of each of wheels based on the previous wheel positions to notify a driver of the tire pressure from an earlier timing. The receiver permits the indication of the tire pressure based on the previous wheel positions only when a difference of the tire pressure between the wheels is equal to or less than a threshold. If there is a possibility that tire pressure of one of the wheels is insufficient, the receiver prevents the indicator to indicate the tire pressure until a current wheel position detection finishes.

Abstract translation: 在轮胎压力检测装置中，接收器将由前一轮位置检测检测到的车轮位置存储为前轮的位置。 当点火开关打开并且通过当前车轮位置检测重新指定车轮位置时，接收器允许指示器基于先前的车轮位置来指示每个车轮的轮胎压力，以通知驾驶员来自驾驶员的轮胎压力 更早的时机。 只有当车轮之间的轮胎压力的差等于或小于阈值时，接收器才允许基于先前车轮位置的轮胎压力的指示。 如果一个车轮的轮胎压力有可能不足，则接收器防止指示器指示轮胎压力，直到当前车轮位置检测结束。

公开(公告)号：US11338814B2

公开(公告)日：2022-05-24

申请号：US16910412

申请日：2020-06-24

Applicant: DENSO CORPORATION

Inventor： Ryosuke Kanbayashi ,  Nobuya Watabe

IPC: B60W40/06 ,  G01H11/08 ,  G01P15/00 ,  B60C19/00

Abstract: A road surface condition assessing device includes: a tire-mounted device; and a vehicle body system. The tire-mounted device includes: a vibration detector that outputs a detection signal of a vibration on a tire; a waveform processor that generates the road surface data; and a first data communication unit. The vehicle body system includes: a second data communication unit; and a road surface evaluation unit that evaluates the road surface condition. The tire-mounted device transmits an advertise signal including the road surface data indicative of a result of a waveform process on the detection signal and a waveform processing value corresponding to the road surface condition. The vehicle body system evaluates the road surface condition based on the waveform processing value.

公开(公告)号：US10239366B2

公开(公告)日：2019-03-26

申请号：US15328533

申请日：2015-07-24

Applicant: DENSO CORPORATION

Inventor： Takatoshi Sekizawa ,  Masashi Mori ,  Nobuya Watabe

IPC: B60C23/04 ,  G08C17/00 ,  G01D5/16 ,  B29D30/00

Abstract: A wheel position detecting device can suppress an erroneous detection of a wheel position even if a moving direction of a vehicle cannot be determined by wheel speed sensors whether in a forward direction or in a rearward direction. When an edge number (or a tooth number) is incremented based on detection signals of the wheel speed sensors of one, two or three wheels while the vehicle is at a halt, the edge number (or the tooth number) is not used as learning data. Thus, it is less likely that the wheel position is erroneously detected based on erroneous learning data. Therefore, even if the moving direction of the vehicle cannot be determined whether in the forward direction or the rearward direction by the wheel speed sensors, the wheel position detecting device can suppress the erroneous wheel position detection.

公开(公告)号：US09783013B2

公开(公告)日：2017-10-10

申请号：US14368240

申请日：2012-12-04

Applicant: DENSO CORPORATION

Inventor： Noriaki Okada ,  Nobuya Watabe ,  Masashi Mori ,  Takatoshi Sekizawa

IPC: G01P3/44 ,  B60C23/04 ,  G01P15/00

CPC classification number: B60C23/0489 ,  B60C23/0416 ,  G01P3/44 ,  G01P15/003

Abstract: A wheel position detector for a vehicle includes: a transmitter at each wheel having a first control portion for generating and transmitting a frame with specific identification information; and a receiver at a vehicle body receiving the frame from one wheel and having a second control portion for performing wheel position detection; and a wheel speed sensor for detecting a tooth of a gear. The second control portion: acquires gear information indicating a tooth position; corrects the tooth position based on a time difference between acquiring of the gear information and receiving time of the frame; and specifies the one wheel based on the tooth position at reception time.

公开(公告)号：US09776461B2

公开(公告)日：2017-10-03

申请号：US14908389

申请日：2014-06-16

Applicant: DENSO CORPORATION

Inventor： Noriaki Okada ,  Nobuya Watabe ,  Masashi Mori

IPC: B60C23/04 ,  G01L17/00

CPC classification number: B60C23/0445 ,  B60C23/0455 ,  B60C23/0462 ,  G01L17/00

Abstract: In a tire inflation pressure detection device, a receiver functions such that, when an ignition switch is on, power is generated by a power supply controller to set the power supply state of the receiver to one in which frame reception is enabled to detect the inflation pressure of a tire, and such that, when the IG is off, in each predetermined intermittent cycle power is generated by the power supply controller to set the power supply state of the receiver to one in which frame reception is enabled to detect the inflation pressure of the tire. A transmitter determines whether a decrease in tire inflation pressure occurs, and when the decrease occurs, the transmitter transmits frames more frequently than before the occurrence of the decrease in tire inflation pressure at a shorter frame transmission time interval than a regular transmission cycle during a high-frequency transmission period.

公开(公告)号：US20150142259A1

公开(公告)日：2015-05-21

申请号：US14406442

申请日：2013-06-06

Applicant: DENSO CORPORATION

Inventor： Masashi Mori ,  Nobuya Watabe

IPC: B60C23/04

CPC classification number: B60C23/0416 ,  B60C23/0455 ,  B60C23/0488 ,  B60C23/0489 ,  G01P3/481 ,  G01P15/00

Abstract: In a wheel position detecting device, a first controlling section of a transmitter transmits a frame when an increasing or decreasing direction of values of gravitational acceleration components included in detection signals of an acceleration sensor, which is detected at predetermined intervals, is continuously the same direction. A second controlling section of a receiver acquires gear information indicating a teeth position of gears in accordance with the detection signal of wheel speed sensors, and performs the wheel position detection in accordance with gear information at a reception timing of the frame.

Abstract translation: 在车轮位置检测装置中，当以预定间隔检测到的加速度传感器的检测信号中包含的重力加速度分量的值的增加或减小的方向的增加或减小方向连续地相同时，发射器的第一控制部分发送帧 。 接收机的第二控制部分根据车轮速度传感器的检测信号获取指示齿轮齿位置的齿轮信息，并根据帧的接收定时根据齿轮信息执行车轮位置检测。

公开(公告)号：US20140340213A1

公开(公告)日：2014-11-20

申请号：US14365576

申请日：2012-12-04

Applicant: DENSO CORPORATION

Inventor： Noriaki Okada ,  Masashi Mori ,  Takatoshi Sekizawa ,  Nobuya Watabe

IPC: B60C23/04

CPC classification number: B60C23/0416 ,  B60C23/0405 ,  B60C23/0488 ,  B60C23/0489

Abstract: A wheel position detector for a vehicle includes: a transmitter at each wheel having a first controller for generating and repeatedly transmitting a frame with specific identification information and an acceleration sensor; a receiver at a vehicle body receiving the frame from one wheel and having a second controller for performing wheel position detection; and a wheel speed sensor for detecting a tooth of a gear. The second controller acquires gear information indicating a tooth position; sets a variation allowance based on the tooth position; registers the one wheel with using the variation allowance; sets another variation allowance based on another tooth position when the receiver receives a new frame; and changes the variation allowance to a new variation allowance provided by an overlap portion between the variation allowance and another variation allowance.

Abstract translation: 一种用于车辆的车轮位置检测器包括：每个车轮处的发射机具有用于产生并重复地发送具有特定识别信息的帧的第一控制器和加速度传感器; 在车身处接收来自一个车轮的车架的接收器，并具有执行车轮位置检测的第二控制器; 以及用于检测齿轮的齿的车轮速度传感器。 第二控制器获取指示齿位置的齿轮信息; 根据牙齿位置设定变化余量; 使用变化补偿登记一个车轮; 当接收器接收到新的帧时，基于另一个齿位置设置另一种变化允许; 并将变更余量变更为由变更余量与其他变更余量之间的重叠部分提供的新变更余量。

公开(公告)号：US12252132B2

公开(公告)日：2025-03-18

申请号：US16929862

申请日：2020-07-15

Applicant: DENSO CORPORATION

Inventor： Yoichiro Suzuki ,  Nobuya Watabe ,  Masashi Mori ,  Takatoshi Sekizawa

IPC: B60W40/06 ,  B60C11/24 ,  B60C23/06 ,  G01W1/14 ,  B60C23/04 ,  B60T8/172 ,  G01M99/00

Abstract: A road surface state determination device includes a tire-side device and a vehicle-body-side system. The tire-side device is attached to each of a plurality of tires included in a vehicle. The vehicle-body-side system is included in a body of the vehicle. The tire-side device may output a detection signal corresponding to a magnitude of vibration of the tire. The tire-side device may sense the detection signal and generate road surface data indicative of a road surface state appearing in a waveform of the detection signal. The tire-side device may transmit the road surface data. The vehicle-body-side system may perform bidirectional communication with the tire-side device and receive the road surface data. The vehicle-body-side system may determine the road surface state of a road surface on which the vehicle is traveling based on the road surface data.

公开(公告)号：US11597238B2

公开(公告)日：2023-03-07

申请号：US17157687

申请日：2021-01-25

Applicant: DENSO CORPORATION

Inventor： Ryosuke Kanbayashi ,  Nobuya Watabe ,  Masashi Mori

IPC: B60C11/24 ,  G01M17/02

Abstract: A tire system includes a tire side device that is arranged corresponding to a tire provided in a vehicle and transmits data related to the tire, and a wear estimation unit that estimates a tire wear state based on the data related to the tire. The tire side device holds data related to an elapsed time since the tire was manufactured as data related to the tire, transmits data related to the elapsed time to the wear estimation unit. The wear estimation unit estimates the tire wear state based on the mileage from the start of use of the tire and a tire deterioration degree indicated by the data related to the elapsed time.

公开(公告)号：US11549808B2

公开(公告)日：2023-01-10

申请号：US16814789

申请日：2020-03-10

Applicant: DENSO CORPORATION

Inventor： Yoichiro Suzuki ,  Takatoshi Sekizawa ,  Nobuya Watabe

IPC: G01B17/08 ,  B60C23/04

Abstract: In a road surface condition determining device, when determining a road surface condition, a vibration detection unit, a waveform processing unit and a data transmission unit for implementing a sensing function and a data transmission function are not set continuously to an active state for all tire side device, but at least only one tire side device is set to an active state. Remaining one or more is set to a sleep state. A reduction in power consumption of the tire side devices set to the sleep state can thus be achieved. Further, with regard to the at least one tire side device, since the sensing function and the data transmission function remain in the active state, the road surface condition can be reliably determined based on the road surface data of the tire side device.