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1.发明公开公开(公告)号：US20240225508A9
公开(公告)日：2024-07-11
申请号：US18461782
申请日：2023-09-06
发明人： Takashi YASUI , Ryoh MAEDA , Daisuke OYAMA , Yoshiaki ADACHI
CPC分类号： A61B5/243 , A61B5/245 , G01R33/0356
摘要： A biomagnetic field measurement device to measure a biomagnetic field includes a superconducting quantum interference device (SQUID) sensor, and includes a flux locked loop unit. The SQUID sensor includes an adjustment device configured to adjust a loop gain of the flux locked loop unit.
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2.发明公开公开(公告)号：US20240130654A1
公开(公告)日：2024-04-25
申请号：US18461782
申请日：2023-09-05
发明人： Takashi YASUI , Ryoh MAEDA , Daisuke OYAMA , Yoshiaki ADACHI
CPC分类号： A61B5/243 , A61B5/245 , G01R33/0356
摘要： A biomagnetic field measurement device to measure a biomagnetic field includes a superconducting quantum interference device (SQUID) sensor, and includes a flux locked loop unit. The SQUID sensor includes an adjustment device configured to adjust a loop gain of the flux locked loop unit.
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公开(公告)号：US20210103012A1
公开(公告)日：2021-04-08
申请号：US17062749
申请日：2020-10-05
发明人： Takashi YASUI , Daisuke OYAMA
IPC分类号： G01R33/035
摘要： A magnetic field measuring apparatus includes a digital FLL circuit including ADC that converts a periodically changing voltage output from a SQUID according to a change in a magnetic field into a digital value, a digital integrator that integrates the digital value output from the ADC, a DAC that converts an integrated value output from the digital integrator into a voltage, a converter that converts the voltage output from the DAC into a current, and a coil that generates the magnetic field received by the SQUID, based on the current output from the converter. A calculating device calculates a digital value indicating a flux quantum based on the digital value output from the ADC when the ADC converts the periodically changing voltage output from the SQUID upon receiving the magnetic field generated by a current that is obtained by converting a voltage generated by a voltage generator.
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