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公开(公告)号：US20140319538A1
公开(公告)日：2014-10-30
申请号：US14220093
申请日：2014-03-19
发明人： Kazuma TAKENAKA
CPC分类号： H01L29/84 , G01L1/16 , G01L1/18 , G01L5/162 , G01L5/167 , G01L9/0052 , G01L9/008 , G01L9/06 , H01L29/1602
摘要： A force detection device includes a diamond piezoresistor including a highly orientated diamond into which boron is introduced as an impurity. The absolute value of the piezoresistance coefficient of the diamond piezoresistor is greater than the absolute value of a piezoresistance coefficient π11 or π12 in a case in which a major axis is in the direction.
摘要翻译： 力检测装置包括金刚石压敏电阻，其包括高导向金刚石，其中作为杂质引入硼。 在长轴在<100>方向的情况下，金刚石压敏电阻的压阻系数的绝对值大于压电阻系数的绝对值pgr 11或pgr 12。
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公开(公告)号：US20210088557A1
公开(公告)日：2021-03-25
申请号：US16971927
申请日：2019-02-05
发明人： Kazuma TAKENAKA , Tetsuya ISHIKAWA , Minako TERAO , Kotaro OGAWA , Saki KOBAKO
摘要： A current measuring device (1) includes two triaxial magnetic sensors (11, 12) that are arranged with a prescribed gap between the the two triaxial magnetic sensors (11, 12) such that magnetic-sensing directions of the two triaxial magnetic sensors (11, 12) are parallel to each other, and a calculator configured to calculate a current (I) flowing in a measurement-object conductor (MC) based on detection results from the two triaxial magnetic sensors (11, 12) and a gap between the two triaxial magnetic sensors (11, 12).
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公开(公告)号：US20230273243A1
公开(公告)日：2023-08-31
申请号：US18016802
申请日：2021-07-26
发明人： Kazuma TAKENAKA , Kotaro OGAWA , Minako TERAO , Naoki NOGUCHI
CPC分类号： G01R15/181 , G01R15/207
摘要： A current measurement device (1 to 3) includes a first sensor (SE1) configured to detect a direct current magnetic field and a low-frequency alternating current magnetic field generated by a current (I) flowing through a measurement target conductor (MC), a hollow magnetic shielding member (12) that includes a cutout portion (CP2) into which the measurement target conductor is inserted and in which the first sensor is accommodated, a fixing mechanism (13) configured to fix the measurement target conductor such that a distance between a center of the measurement target conductor inserted into the cutout portion of the magnetic shielding member and the first sensor is a predetermined reference distance (r), and a first calculator (21) configured to calculate a current flowing through the measurement target conductor based on a detection result of the first sensor.
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公开(公告)号：US20150145509A1
公开(公告)日：2015-05-28
申请号：US14541725
申请日：2014-11-14
发明人： Kazuma TAKENAKA , Shinya MITO , Satoshi KATO , Soukichi FUNAZAKI
CPC分类号： G01V3/08 , G01N27/9046 , G01R33/09
摘要： A conductive foreign material detecting apparatus includes an exciting coil configured to apply an AC magnetic field to a base substance through which the AC magnetic field passes, a magnetic sensor configured to detect a change of the AC magnetic field caused by a conductive foreign material on a surface of the base substance or in the base substance, a noise reduction coil configured to reduce a noise of substantially the same frequency as the AC magnetic field other than the change of the AC magnetic field by generating predetermined magnetic field to the AC magnetic field, and a current controller configured to control a drive current and a phase of the noise reduction coil so as to make the noise of substantially the same frequency as the AC magnetic field other than the change of the AC magnetic field be minimal.
摘要翻译： 导电异物检测装置包括：励磁线圈，被配置为向交流磁场通过的基础物质施加交流磁场;磁传感器，被配置为检测由导电异物引起的交流磁场的变化， 基体物质的表面或基体物质中的除了交流磁场的变化以外的交流磁场的频率大致相同的噪声的噪声降低线圈，通过对交流磁场产生规定的磁场， 以及电流控制器，被配置为控制所述降噪线圈的驱动电流和相位，以使得除了所述交流磁场的变化之外的与所述AC磁场基本相同的频率的噪声最小。
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公开(公告)号：US20220214383A1
公开(公告)日：2022-07-07
申请号：US17609984
申请日：2020-05-11
发明人： Kazuma TAKENAKA , Tetsuya ISHIKAWA , Minako TERAO , Kotaro OGAWA , Saki KOBAKO , Naoki NOGUCHI
摘要： A current measurement device includes: four or more triaxial magnetic sensors arranged to have predefined positional relationships such that magnetism-sensing directions thereof are parallel to each other; and a calculator configured to calculate currents flowing through a pair of conductors to be measured, which are arranged in proximity to each other, based on detection results of the four or more triaxial magnetic sensors and the positional relationships between the four or more triaxial magnetic sensors, the currents flowing in mutually opposite directions.
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公开(公告)号：US20220146406A1
公开(公告)日：2022-05-12
申请号：US17427673
申请日：2019-12-27
摘要： An absolute thickness distribution cannot be accurately calculated with a conventional technique. A sensor device is provided that includes a plurality of magnetic sensors arranged to face an outer circumference surface of a pipeline and ultrasonic sensors arranged to face the outer circumference surface and measure a thickness of the pipeline in a measurement region in which the plurality of magnetic sensors measure a magnetic field, the ultrasonic sensors being less than the plurality of magnetic sensors.
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公开(公告)号：US20210349162A1
公开(公告)日：2021-11-11
申请号：US17282591
申请日：2019-10-03
发明人： Kazuma TAKENAKA
摘要： The magnetic detector 1 according to the present disclosure includes a transmission line 10 having a linear first conductor 11 including a magnetic material, a signal generator 30 configured to input a pulse as an incident wave to the transmission line 10, and a calculator 20 configured to detect a reflected wave caused by impedance mismatching at a magnetic field application position of the transmission line 10 and the incident wave. The calculator 20 calculates a position and a strength of the magnetic field applied to the transmission line 10 on the basis of the incident wave and the reflected wave.
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公开(公告)号：US20220283247A1
公开(公告)日：2022-09-08
申请号：US17637895
申请日：2020-08-25
发明人： Kazuma TAKENAKA , Minako TERAO , Kotaro OGAWA , Saki KOBAKO , Naoki NOGUCHI
IPC分类号： G01R33/028 , G01R15/20 , G01R33/09 , G01R33/07
摘要： A current measurement device (1 and 2) is for measuring a current (I) flowing through measurement target conductors (MC1 and MC2), and the current measurement device includes: a plurality of triaxial magnetic sensors (11, 12, and 13) disposed so that a magnetic sensing direction and a relative position have a prescribed relationship; a noise remover (25a) configured to remove noise components included in detection results of the plurality of triaxial magnetic sensors; a sign adder (25b) configured to add a sign to the detection results from which the noise components have been removed, based on sign information of each of the detection results of the plurality of triaxial magnetic sensors obtained at a specific point in time; and a current calculator (25c and 25d) configured to calculate a current flowing through the measurement target conductors by using the detection results to which the sign has been added by the sign adder.
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公开(公告)号：US20220244295A1
公开(公告)日：2022-08-04
申请号：US17620196
申请日：2020-06-17
发明人： Kazuma TAKENAKA , Kotaro OGAWA , Minako TERAO , Naoki NOGUCHI , Saki KOBAKO , Fumitake TERAO , Satoshi YOSHITAKE
摘要： The current measurement device (1, 2) includes a first sensor (SE1) configured to detect a direct current magnetic field and a low-frequency alternating current magnetic field generated due to the current (1) flowing through the conductor (MC) to be measured, a second sensor (SE2) configured to detect alternating current magnetic fields from a low frequency to a high frequency generated due to the current (1) flowing through the conductor to be measured, a first calculator (21, 21A) configured to calculate the current flowing through the conductor to be measured from a detection result of the first sensor using distance information indicating a distance (r) between the first sensor (SE1) and the conductor (MC) to be measured, a second calculator (22) configured to calculate the current flowing through the conductor to be measured from a detection result of the second sensor, and a synthesizer (23) configured to synthesize a calculation result of the first calculator with a calculation result of the second calculator.
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公开(公告)号：US20180120357A1
公开(公告)日：2018-05-03
申请号：US15793485
申请日：2017-10-25
发明人： Kazuma TAKENAKA
CPC分类号： G01R15/181 , G01R15/18 , G01R15/185 , G01R15/20 , G01R15/202 , G01R15/205 , G01R15/207 , G01R19/0061 , G01R19/0092 , G01R33/0005 , G01R33/0041 , G01R33/02 , G01R33/07
摘要： A current measurement device includes a low frequency measurement sensor configured to measure a magnetic field, a high frequency measurement sensor configured to measure the magnetic field and configured to generate a magnetic field for canceling the magnetic field applied to the low frequency measurement sensor, a magnetism sensing direction of the low frequency measurement sensor and a magnetism sensing direction of the high frequency measurement sensor being substantially parallel to each other, a negative feedback circuit configured to control a current flowing through the high frequency measurement sensor based on the magnetic field measured by the low frequency measurement sensor, a low pass filter configured to adjust a frequency characteristic of the current controlled by the negative feedback circuit, and an outputter configured to output a measurement value of the current to be measured based on the current flowing through the high frequency measurement sensor.
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