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公开(公告)号：US11639861B2
公开(公告)日：2023-05-02
申请号：US16423478
申请日：2019-05-28
Applicant: DENSO CORPORATION
Inventor： Toshihiro Fujita , Nobuyori Nakajima , Masaya Taki , Takahiro Suzuki
Abstract: An electric power steering apparatus has a rotation detection device that includes a sensor section that detects a rotation of a motor and outputs a mechanical angle and a count value, and a signal obtainer that obtains the mechanical angle and the count value from the sensor section. The rotation detection device also includes an absolute angle calculator that calculates an absolute angle based on the mechanical angle and the count value and a storage area for storing a reference value that is used for correcting calculation errors in the absolute angle.
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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：US10466122B2
公开(公告)日：2019-11-05
申请号：US15685919
申请日：2017-08-24
Applicant: DENSO CORPORATION
Inventor： Koichi Nakamura , Masaya Taki
Abstract: In a sensor device, microcomputers acquire detection signals from plural sensor sections. A first signal line includes a main line and a sub line, and is capable of bidirectional communication between the sensor section and the microcomputers. A second signal line includes a main line and a sub line, and is capable of bidirectional communication between the sensor section and the microcomputers. A trigger signal is transmitted to the sensor section from the first microcomputer via the main line. A trigger signal is transmitted to the sensor section from the second microcomputer via the main line. Detection of steering torque can be continued in the occurrence of an abnormality in part of the sensor sections or microcomputers.
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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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Patent Agency Ranking
公开(公告)号：US20170050670A1
公开(公告)日：2017-02-23
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
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.
Abstract translation: 传感器装置包括主传感器，副传感器和电子控制单元（ECU）。 ECU具有扭矩计算器，其在主输出信号正常时将作为转向转矩的主转向转矩设定为基于主传感器信号计算的主转向转矩。 在关于主输出信号的异常检测和异常建立之间的过渡期间，转矩计算器基于（i）基于副传感器信号计算的副转向转矩来计算转向转矩，以及（ii） 异常检测主转向扭矩。 以这种方式，即使在传感器信号的一部分中检测到异常的情况下，也可以防止由于转向转矩计算的切换而导致的转向转矩的波动或仅伴随着正常信号的计算。
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公开(公告)号：US20170029022A1
公开(公告)日：2017-02-02
申请号：US15222686
申请日：2016-07-28
Applicant: DENSO CORPORATION
Inventor： Kouichi Nakamura , Katsuhiko Hayashi , Takaharu Kozawa , Shuji Kuramitsu , Masaya Taki , Toshimitsu Sakai
CPC classification number: B62D6/10 , B62D5/0409 , B62D5/0421 , B62D5/0463 , B62D5/0487 , B62D5/049 , G01L3/101 , G01L25/003
Abstract: A sensor device includes a plurality of sensor elements and an output circuit in one sensor part, and a correction value calculator in an ECU, which obtains output signals from the sensor part and calculates an offset correction value based on a plurality of signal values that correspond to a detection value when a calculability condition is satisfied. The ECU also includes a control calculator that performs a calculation based on the corrected signal values that have been corrected by the offset correction value. Therefore, the offset correction value is calculated in view of an aging and an accuracy variation of the components used in the sensor device. In such manner, the detection value is appropriately corrected for the calculation.
Abstract translation: 传感器装置包括多个传感器元件和一个传感器部分中的输出电路，以及ECU中的校正值计算器，其获得来自传感器部分的输出信号，并且基于对应于多个信号值的偏移校正值 达到可计算条件时的检测值。 ECU还包括控制计算器，该控制计算器基于通过偏移校正值校正的校正信号值执行计算。 因此，考虑到传感器装置中使用的部件的老化和精度变化，计算偏移校正值。 以这种方式，适当地校正检测值用于计算。
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公开(公告)号：US20160362129A1
公开(公告)日：2016-12-15
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.
Abstract translation: 通信系统包括至少一个包括至少一个感测元件和传输电路的传感器装置，以及包括接收电路和差分计算器的微型计算机。 感测元件检测表示检测对象的物理量的传感器值，并且发送电路作为数字信号发送包含表示传感器值的信息在预定传输周期的传感器信号。 接收电路通过信号线接收传感器信号，并用当前时间传感器值更新上次传感器值。 差分计算器通过对与传感器值分开提供的更新的使用时间信息执行时间差分计算，以预定的计算周期计算时间差分值。
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公开(公告)号：US20160339948A1
公开(公告)日：2016-11-24
申请号：US15158207
申请日：2016-05-18
Applicant: DENSO CORPORATION
Inventor： Koichi Nakamura , Katsuhiko Hayashi , Takaharu Kozawa , Shuji Kuramitsu , Masaya Taki , Toshimitsu Sakai
CPC classification number: G01R33/04 , B62D1/04 , B62D5/049 , B62D6/10 , G01D5/24461 , G01L3/104 , G01R33/072
Abstract: A sensor device includes a first sensor section and a second sensor section, and the first sensor section has sensor elements and an output circuit for generating and transmitting an output signal including signals that respectively correspond to sensing values from the two sensor elements, and the second sensor section has sensor elements and an output circuit for generating and transmitting an output signal including signals that respectively correspond to sensing values from the two sensor elements. The sensor device further includes an ECU that has an abnormality determiner for determining abnormality of the sensor sections, and a calculator, thereby enabling a continuation of abnormality monitoring of a normal sensor section, even when a part of the sensor sections is abnormal.
Abstract translation: 传感器装置包括第一传感器部分和第二传感器部分，第一传感器部分具有传感器元件和输出电路，用于产生和传输包括分别对应于来自两个传感器元件的感测值的信号的输出信号，第二传感器部分 传感器部分具有传感器元件和用于产生和传输包括分别对应于来自两个传感器元件的感测值的信号的输出信号的输出电路。 传感器装置还包括具有用于确定传感器部分的异常的异常确定器的ECU和计算器，从而即使当传感器部分的一部分异常时也能够继续正常传感器部分的异常监测。
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公开(公告)号：US11529990B2
公开(公告)日：2022-12-20
申请号：US16298224
申请日：2019-03-11
Applicant: DENSO CORPORATION
Inventor： Masaya Taki , Toshihiro Fujita , Shuji Kuramitsu , Koichi Nakamura , Toshimitsu Sakai
IPC: B62D5/04
Abstract: An ECU, which is a signal control apparatus, has a plurality of control units, which control one same motor. Steering angle calculation units acquire sensor signals from the angle sensors provided corresponding to the steering angle calculation units, respectively, and calculate the steering angles in correspondence to the sensor signals. The angle FB units perform the angle FB control based on the angle differences, which are between the target angle and the steering angle and between the target angle and the steering angle, respectively. In the angular FB unit of at least one of the control units, the angular feedback control is performed using the angle difference, which is subjected to the correction processing to reduce the error between the detection angle of the own system and the detection angle of the other system calculated by the steering angle calculation unit of the other control unit.
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