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公开(公告)号：US20200346655A1
公开(公告)日：2020-11-05
申请号：US16929862
申请日：2020-07-15
Applicant: DENSO CORPORATION
Inventor： Yoichiro SUZUKI , Nobuya WATABE , Masashi MORI , Takatoshi SEKIZAWA
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.
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公开(公告)号：US20200348167A1
公开(公告)日：2020-11-05
申请号：US16936159
申请日：2020-07-22
Applicant: DENSO CORPORATION
Inventor： Naohito TAKASUKA , Yoichiro SUZUKI , Takatoshi SEKIZAWA
Abstract: A vehicle body side system is provided with a second data communication unit that performs bidirectional communication with a tire side device and receives road surface data and measurement data transmitted from a first data communication unit, a road surface determination unit that determines the road surface condition of a road surface on which a vehicle travels based on the road surface data, a reception strength measurement unit that measures the reception strength of the measurement data, and a transmission angle setting unit that stores the reception strength of the measurement data during one rotation of a tire, sets as a transmission angle, a presence angle when the reception strength of the measurement data during one rotation of the tire is high, and transmits data indicating the transmission angle to the tire side device via the second data communication unit. In addition, a control unit causes the first data communication unit to transmit the road surface data when the presence angle becomes the transmission angle.
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公开(公告)号：US20190077408A1
公开(公告)日：2019-03-14
申请号：US16083912
申请日：2017-01-12
Applicant: DENSO CORPORATION
Inventor： Takatoshi SEKIZAWA , Masashi MORI , Nobuya WATABE , Hideyuki IKEMOTO , Yoichiro SUZUKI
Abstract: A hydroplaning determination device that determines occurrence of a hydroplaning phenomenon in a vehicle includes a tire mount sensor including a vibration detection unit, a signal process unit and a transmission unit, and a vehicle body system including a receiver, a condition determination unit and a hydroplaning determination unit. The vibration detection unit is attached to a rear surface of a tire provided in a vehicle and outputs a detection signal according to a magnitude of vibration of the tire. The signal process unit generates a vibration data based on the detection signal. The hydroplaning determination unit determines, based on the vibration data, whether a hydroplaning phenomenon has occurred when the condition determination unit determines that a road surface condition is a wet condition in which a water film exists between the tire and a road surface.
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公开(公告)号：US20210291597A1
公开(公告)日：2021-09-23
申请号：US17343018
申请日：2021-06-09
Applicant: DENSO CORPORATION , SOKEN, INC.
Inventor： Yoichiro SUZUKI , Takatoshi SEKIZAWA
Abstract: A tire wear detection apparatus includes a tire side device and a vehicle body side system. The tire side device includes a vibration detection unit, a vehicle speed estimation unit, a signal processing unit, and a first data communication unit. The vibration detection unit is configured to output a detection signal. The vehicle speed estimation unit is configured to estimate the vehicle speed. The signal processing unit is configured to generate wear data. The vehicle body side system includes a second data communication unit and a controller. The controller has a wear determination unit configured to determine a tire wear state based on the wear data. The signal processing unit is configured to acquire the detection signal within a detection signal acquiring range, and calculate a level value of a vibration level of the acquired detection signal within a predetermined frequency range based on a natural frequency of the tire.
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公开(公告)号：US20210237517A1
公开(公告)日：2021-08-05
申请号：US17236539
申请日：2021-04-21
Applicant: DENSO CORPORATION
Inventor： Yoichiro SUZUKI , Takatoshi SEKIZAWA
Abstract: A tire wear detection apparatus for a vehicle includes a tire side apparatus and a vehicle body side system. In response to a wet road surface being detected, from a vibration waveform of a tire indicated by a detection signal according to a magnitude of a vibration of the tire, the tire side apparatus is configured to (i) acquire a peak level value of a vibration level at a stepping time at which an apparatus corresponding position in the tire corresponding to an arranged position of the tire side apparatus starts to contact the road surface, and/or (ii) calculate a level value of the vibration level in a post-kicking range after the apparatus corresponding position kicks to separate from the road surface, so as to generate a wear data indicating a wear state of the tire.
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Patent Agency Ranking
公开(公告)号：US20200319020A1
公开(公告)日：2020-10-08
申请号：US16910778
申请日：2020-06-24
Applicant: DENSO CORPORATION
Inventor： Kenichiro SANJI , Yoichiro SUZUKI , Hidenori OSAI , Takatoshi SEKIZAWA
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 applied to the tire. The tire-side device may extract data items of a road surface state indicative of the vibration of the tire during one rotation of the tire from the detection signal. The tire-side device may generate road surface data. The tire-side device may transmit the road surface data. The vehicle-body-side system may receive the road surface data. The vehicle-body-side system may determine the road surface state based on the road surface data.
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公开(公告)号：US20190280627A1
公开(公告)日：2019-09-12
申请号：US16426440
申请日：2019-05-30
Applicant: DENSO CORPORATION , TOHOKU UNIVERSITY
Inventor： Yoichiro SUZUKI , Akira TAKAOKA , Takatoshi SEKIZAWA , Hiroki KUWANO
Abstract: A power generation device is provided. A weight may vibrate in one direction as an axial direction in response to an external vibration. A beam may be arranged in at least one side with respect to the weight in the axial direction of the weight, and vibrate together with the weight. A piezoelectric element may be mounted on the beam. A guide may include a hollow guiding a movement of the weight in the axial direction. A stopper may be included in the weight. The stopper may restrict an amount of the movement of the weight in the axial direction within a predetermined amount. A stopper wall may stop the movement of the weight in the axial direction by contacting with the stopper.
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公开(公告)号：US20200317203A1
公开(公告)日：2020-10-08
申请号：US16904260
申请日：2020-06-17
Applicant: DENSO CORPORATION
Inventor： Yoichiro SUZUKI , Takatoshi SEKIZAWA
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 a back surface of a tread of 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 outputs a detection signal corresponding to a magnitude of vibration applied to the tire. The tire-side device generates road surface data indicative of a road surface state appearing in a waveform of the detection signal. The tire-side device transmits the road surface data. The vehicle-body-side system performs bidirectional communication with the tire-side device and receives the road surface data. The vehicle-body-side system determines the road surface state of a road surface on which the vehicle is traveling based on the road surface data.
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公开(公告)号：US20200298635A1
公开(公告)日：2020-09-24
申请号：US16895040
申请日：2020-06-08
Applicant: DENSO CORPORATION
Inventor： Yoichiro SUZUKI , Takatoshi SEKIZAWA , Kenichiro SANJI , Naohito TAKASUKA
IPC: B60C23/04
Abstract: A tire system is configured to enable a general-purpose communication device to establish data communication with a tire-side device, thereby enabling transmission of data indicating a tire-related condition from the tire-side device to the general-purpose communication device. The general-purpose communication device acquires the tire-related condition, and reports the tire-related condition to the user via a notification unit. Based on the above, it is possible to report the tire-related condition via the general-purpose communication device based on the communication between the general-purpose communication device and the tire-side device.
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公开(公告)号：US20200208969A1
公开(公告)日：2020-07-02
申请号：US16814789
申请日：2020-03-10
Applicant: DENSO CORPORATION
Inventor： Yoichiro SUZUKI , Takatoshi SEKIZAWA , Nobuya WATABE
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.
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