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公开(公告)号：US10018468B2
公开(公告)日：2018-07-10
申请号：US14911253
申请日：2014-10-23
Inventor： Hideyuki Murakami , Takashi Kawai
IPC: G01C19/5614 , G01C19/5776 , G01P15/097
CPC classification number: G01C19/5614 , G01C19/5776 , G01P15/097
Abstract: A physical-quantity sensor is configured to be used with a physical-quantity sensor element that outputs a sensor signal in response to a physical quantity. A physical-quantity detection circuit of the physical-quantity sensor includes a signal generating unit for generating a detecting signal and a multiplier that multiplies the sensor signal by the detecting signal. The signal generating unit converts a first phase of a predetermined signal having a frequency corresponding to a frequency of the sensor signal, into a second phase, and calculates an amplitude value corresponding to the second phase as to generate the detecting signal. This physical-quantity sensor improves accuracy of phase adjustment without increasing a sampling frequency.
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公开(公告)号：US20150204690A1
公开(公告)日：2015-07-23
申请号：US14422375
申请日：2013-08-21
Inventor： Sho Shimada , Ryota Sudo , Hideyuki Murakami , Shinjiro Ueda
IPC: G01C25/00 , G01P21/00 , G01C19/5726 , G01P15/097 , G01P15/08
CPC classification number: G01C25/005 , G01C19/5614 , G01C19/5726 , G01C19/5776 , G01P3/486 , G01P15/0888 , G01P15/097 , G01P21/00
Abstract: A physical quantity sensor includes a detection circuit that outputs a detection value indicating a physical quantity applied to a detecting element and a correction processor that corrects the detection value to output a corrected value. The correction processor causes the corrected value to be substantially 0 (zero) if all of conditions that an absolute value of a time-differentiated value of the detection value is not larger than a predetermined differential threshold and that an absolute value of the corrected value is not larger than a predetermined output threshold are satisfied. This physical quantity sensor prevents the output signal from changing due a temperature change in spite of a small number of components
Abstract translation: 物理量传感器包括检测电路，其输出表示施加到检测元件的物理量的检测值，以及校正处理器，其校正检测值以输出校正值。 如果检测值的时间微分值的绝对值不大于预定的差分阈值且校正值的绝对值是否为绝对值，则校正处理器使校正值基本为0（零） 不大于预定输出阈值。 该物理量传感器防止由于温度变化而导致的输出信号变化，尽管组件数量很少
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公开(公告)号：US11915893B2
公开(公告)日：2024-02-27
申请号：US18156256
申请日：2023-01-18
Inventor： Hisashi Sagara , Takeshi Miyaoka , Hideyuki Murakami
CPC classification number: H01H25/002 , H01H25/04
Abstract: A multi-directional operation switch device that can smoothly move a slider that is movable in four directions back to a neutral position is provided. The multi-directional operation switch device includes: a slider movable in the four directions; four push switches provided in the four directions to detect a movement of the slider; and four pressing members provided between the slider and the push switches. The slider includes four side face portions, each intersecting a first axis or a second axis, each axis extending in at least one of the four directions. Each side face portion includes a sloped region sloped toward a center of the slider. The push switches include movable portions, each movable portion self-returning and moving to an original position when pressing is released. Each pressing member is in contact with a corresponding one of the movable portions and a corresponding one of the side face portions.
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公开(公告)号：US10359285B2
公开(公告)日：2019-07-23
申请号：US15219446
申请日：2016-07-26
Inventor： Hideyuki Murakami , Takashi Kawai , Masaki Nakamura
IPC: G01C19/5776
Abstract: An angular velocity sensor including a vibration body having a sensor electrode, a driving electrode, and a monitor electrode. The monitor electrode generates a signal according to vibration of the vibration body. The sensor circuit outputs a signal representing an angular velocity applied to the vibration body. The amplitude determination circuit measures amplitude of vibration of the vibration body. A PLL circuit includes a constant voltage source for generating a constant voltage, a timing switching unit for outputting a voltage by switching selectively between the constant voltage and a voltage corresponding to the monitor signal, and a voltage-controlled oscillator for outputting an oscillation signal having a frequency corresponding to the voltage output from the timing switching unit. When the amplitude measured is smaller than a predetermined value, the timing switching unit outputs the constant voltage output from the constant voltage source and outputs a start-up mode signal.
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公开(公告)号：US09885586B2
公开(公告)日：2018-02-06
申请号：US14422375
申请日：2013-08-21
Inventor： Sho Shimada , Ryota Sudo , Hideyuki Murakami , Shinjiro Ueda
IPC: G01C25/00 , G01C19/5776 , G01C19/5726 , G01P15/08 , G01P15/097 , G01P21/00 , G01C19/5614 , G01P3/486
CPC classification number: G01C25/005 , G01C19/5614 , G01C19/5726 , G01C19/5776 , G01P3/486 , G01P15/0888 , G01P15/097 , G01P21/00
Abstract: A physical quantity sensor includes a detection circuit that outputs a detection value indicating a physical quantity applied to a detecting element and a correction processor that corrects the detection value to output a corrected value. The correction processor causes the corrected value to be substantially 0 (zero) if all of conditions that an absolute value of a time-differentiated value of the detection value is not larger than a predetermined differential threshold and that an absolute value of the corrected value is not larger than a predetermined output threshold are satisfied. This physical quantity sensor prevents the output signal from changing due a temperature change in spite of a small number of components.
