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公开(公告)号：US10384712B2
公开(公告)日：2019-08-20
申请号：US15256277
申请日：2016-09-02
Applicant: DENSO CORPORATION
Inventor： Katsuhiko Hayashi , Takaharu Kozawa , Shuji Kuramitsu , Kouichi Nakamura , Masaya Taki , Toshimitsu Sakai
Abstract: If abnormalities of the sensor part are detected, the power-source control section temporarily stops the electric power supply from the sensor power source to the sensor part so that the sensor power source voltage Vs which is the voltage between the sensor power source and the sensor part falls. In addition, after electric power supply to the sensor part resumes, and the sensor part is recovered from the abnormalities, then, the power source control section continues the electric power supply from the sensor power source to the sensor part. When the sensor part is not recovered from the abnormalities, the power source control section stops the electric power supply from the sensor power source to the sensor part.
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公开(公告)号：US10343714B2
公开(公告)日：2019-07-09
申请号：US15220001
申请日：2016-07-26
Applicant: DENSO CORPORATION
Inventor： Koutarou Nakashima , Shuji Kuramitsu , Kouichi Nakamura , Masaya Taki , Toshimitsu Sakai , Takaharu Kozawa , Katsuhiko Hayashi
Abstract: A sensor device includes sensors and an Electronic Control Unit (ECU). The sensors include sensor elements, a signal comparator, and a signal transmitter. The signal comparator compares a first main detection value from one of the sensor elements, and a first sub detection value from the other of the sensor elements. When the first main detection value matches the first sub detection value, the signal transmitter generates and transmits an output signal that includes a first main signal corresponding to the first main detection value without including a first sub signal corresponding to the first sub detection value. In such manner, the responsiveness of the sensor device may be improved, without deteriorating a reliability of the output signals from the sensor sections.
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公开(公告)号：US10328972B2
公开(公告)日：2019-06-25
申请号：US15479066
申请日：2017-04-04
Applicant: DENSO CORPORATION
Inventor： Toshihiro Fujita , Hideki Kabune , Katsuhiko Hayashi , Takaharu Kozawa , Shuhei Miyachi , Koichi Nakamura , Yuki Watanabe , Atsuko Oka , Shuji Kuramitsu , Toshimitsu Sakai , Masaya Taki
Abstract: In a rotation detecting apparatus, a sensor includes a sensor element outputting a measurement value representing rotation of a detection target, and a circuit module. The circuit module includes a rotational angle calculator calculating, based on the measurement value, rotational angle information indicative of a rotational angle of the detection target. The rotational angle calculator generates a rotational angle signal including the rotational angle information. The circuit module includes a rotation number calculator calculating, based on the measurement value, rotation number information representing the number of rotations of the detection target. The rotation number calculator generates a rotation number signal including the rotation number information. An output unit outputs, as an output signal, a series of the rotational angle signal and the rotation number signal. A controller obtains the output signal from the communicator, and calculates, based on the output signal, information about the rotation of the detection target.
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公开(公告)号：US10077069B2
公开(公告)日：2018-09-18
申请号：US15238356
申请日：2016-08-16
Applicant: DENSO CORPORATION
Inventor： Shuji Kuramitsu , Katsuhiko Hayashi , Takaharu Kozawa , Kouichi Nakamura , Masaya Taki , Toshimitsu Sakai
CPC classification number: B62D5/0484 , B62D5/0463 , B62D5/049 , B62D6/10 , G01L5/22 , G01L5/221 , G01L25/003
Abstract: A sensor device includes a main sensor, a sub sensor, and an Electronic Control Unit (ECU). The ECU has a torque calculator that sets, as a steering torque, a main steering torque that is calculated based on a main sensor signal when a main output signal is normal. During a transition period between an abnormality detection and an abnormality establishment regarding the main output signal, the torque calculator calculates the steering torque based on (i) a sub steering torque calculated based on a sub sensor signal and (ii) a prior-to-abnormality-detection main steering torque. In such manner, even when abnormality is detected in a part of the sensor signals, a fluctuation of the steering torque due to, or accompanying, the switching of the steering torque calculation to a normal signal only calculation is prevented.
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公开(公告)号：US20160339945A1
公开(公告)日：2016-11-24
申请号：US15158283
申请日：2016-05-18
Applicant: DENSO CORPORATION
Inventor： Takaharu Kozawa , Shuji Kuramitsu , Koichi Nakamura , Katsuhiko Hayashi , Masaya Taki , Toshimitsu Sakai
IPC: B62D5/04
CPC classification number: B62D5/049 , B62D5/0463 , G01L3/104 , G01L25/003
Abstract: A sensor device including a first output circuit generating and outputting a first output signal that is generated as a signal sequence from a first main signal based on a detection value of a first main sensor element to a first sub signal based on a detection value of a first sub sensor element, a second output circuit generating and outputting a second output signal that is generated as a signal sequence from a second main signal based on a detection value of a second main sensor element to a second sub signal based on a detection value of a second sub sensor element, and an abnormality determiner determining abnormality of the device based on the first output signal and the second output signal.
Abstract translation: 一种传感器装置，包括：第一输出电路，其基于第一主传感器元件的检测值，基于第一主传感器元件的检测值，生成并输出作为来自第一主信号的信号序列产生的第一输出信号 第一子传感器元件，第二输出电路，基于第二主传感器元件的检测值，基于第二主信号的检测值，生成并输出作为来自第二主信号的信号序列产生的第二输出信号， 第二子传感器元件和异常判定器，其基于第一输出信号和第二输出信号来确定装置的异常。
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Patent Agency Ranking
公开(公告)号：US09352771B2
公开(公告)日：2016-05-31
申请号：US14596992
申请日：2015-01-14
Applicant: DENSO CORPORATION
Inventor： Shuji Kuramitsu
CPC classification number: B62D5/0463 , B62D5/0481 , G06F17/11
Abstract: An electric power steering control device for controlling an assist torque output by a motor includes: a steering wheel of a vehicle; a torsion bar between the steering wheel and a column shaft; a torque sensor that detects a steering torque; a turning device that converts a rotation motion of the column shaft into a reciprocating motion of a rack that turns a wheel of the vehicle; the motor; a motor rotation angle sensor that detects a rotation angle of the motor; a steering shaft load estimation unit that estimates a steering shaft load; and a basic assist control unit that calculates a basic assist torque command value. The steering shaft load estimation unit estimates the steering shaft load based on the steering torque, a steering angular velocity or a steering angle acceleration, and a previous value of the basic assist torque command value.
Abstract translation: 一种用于控制由电动机输出的辅助转矩的电动助力转向控制装置，包括：车辆的方向盘; 方向盘和柱轴之间的扭杆; 检测转向转矩的转矩传感器; 旋转装置，其将柱轴的旋转运动转换成转动车辆的车轮的齿条的往复运动; 电机; 电动机旋转角传感器，其检测电动机的旋转角度; 估计转向轴负载的转向轴负载估计单元; 以及基本辅助控制单元，其计算基本辅助转矩指令值。 转向轴负载估计单元基于转向扭矩，转向角速度或转向角加速度以及基本辅助转矩指令值的先前值来估计转向轴负载。
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7.发明授权公开(公告)号：US11254352B2
公开(公告)日：2022-02-22
申请号：US16405040
申请日：2019-05-07
Applicant: DENSO CORPORATION
Inventor： Atsuko Oka , Shuji Kuramitsu , Koichi Nakamura , Nobuyori Nakajima , Go Endoh , Yosuke Ogi
IPC: H02P1/46 , B62D5/04 , H02K11/27 , H02P29/40 , H02P6/04 , H02P21/22 , H02P29/60 , H02P29/028 , H02P21/00 , H02P25/22
Abstract: A rotary electric machine control device for controlling driving of a rotary electric machine including a plurality of winding sets, includes: a plurality of drive circuits; and a plurality of control units, each of which includes: an individual current limit value calculation unit; a current limit value calculation unit; and a control signal calculation unit. The current limit value calculation unit switches between a current limit value sharing mode and a current limit value non-sharing mode. An electric power steering device includes: the rotary electric machine control device; the rotary electric machine that outputs an assist torque for assisting a steering operation of a steering wheel by a driver; and a power transmission unit that transmits a driving force of the rotary electric machine to a drive target.
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公开(公告)号：US10654518B2
公开(公告)日：2020-05-19
申请号：US16243519
申请日：2019-01-09
Applicant: DENSO CORPORATION
Inventor： Toshimitsu Sakai , Masaya Taki , Shuji Kuramitsu , Koichi Nakamura
IPC: F04D15/00 , H02K7/14 , B62D5/04 , G06F1/12 , H02P25/22 , B62D6/08 , H02P27/06 , H02P27/08 , G06F9/4401 , G06F1/06
Abstract: A motor control apparatus include: multiple motor drive circuits that drives at least one motor; multiple microcomputers that include a drive signal generator, and a drive timing generator; and multiple clock generation circuits. The microcomputers include a synchronization signal transmitter microcomputer as at least one microcomputer that transmits a synchronization signal synchronized with the drive timing of an own microcomputer and synchronizing the drive timing of the microcomputers. The microcomputers include a synchronization signal receiver microcomputer as at least one microcomputer that receives the synchronization signal transmitted from the synchronization signal transmitter microcomputer.
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公开(公告)号：US10173720B2
公开(公告)日：2019-01-08
申请号：US15222691
申请日：2016-07-28
Applicant: DENSO CORPORATION
Inventor： Takaharu Kozawa , Shuji Kuramitsu , Kouichi Nakamura , Masaya Taki , Toshimitsu Sakai , Katsuhiko Hayashi
Abstract: A sensor device includes two sensor parts and an ECU. An output division of one of the two sensor parts stops output of an output signal when a detected internal abnormality is a first abnormality. Further, when the detected internal abnormality is a second abnormality that is different from the first abnormality, the output division controls an abnormality signal to take a value indicative of the second abnormality. An abnormality determiner determines either of a signal obtainment abnormality or the first abnormality of the sensor part when the output signal is not obtained from the one of the sensor parts, or determines the second abnormality of the one of the sensor parts when the obtained output signal includes the abnormality signal having a value indicative of the second abnormality. Such determination, thus, enables the abnormality determiner to classify an abnormality caused in the sensor parts.
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公开(公告)号：US09878736B2
公开(公告)日：2018-01-30
申请号：US15178414
申请日：2016-06-09
Applicant: DENSO CORPORATION
Inventor： Masaya Taki , Toshimitsu Sakai , Shuji Kuramitsu , Kouichi Nakamura , Takaharu Kozawa , Katsuhiko Hayashi
CPC classification number: B62D5/0463 , B62D5/0409 , G01D21/00 , H04L7/06 , H04L67/12 , H04Q9/04
Abstract: A communication system includes at least one sensor apparatus including at least one sensing element and a transmission circuit, and a microcomputer including a reception circuit and a differential calculator. The sensing element detects a sensor value indicating a physical quantity of a detection target, and the transmission circuit transmits, as a digital signal, a sensor signal including information indicative of the sensor value at a predetermined transmission cycle. The reception circuit receives the sensor signal through a signal line and updates last time sensor value with present time sensor value. The differential calculator calculates, at a predetermined calculation cycle, a time differential value by performing a time differential calculation to the updated using time information provided separate from the sensor value.
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