1
Marcos Laraia
Jose Marcos Laraia, Masahisa Niwa, Robert P Moehrke, Jose G Taveira: Reactive sensor modules using Pade Approximant based compensation and providing module-sourced excitation. AMI Semiconductor, Matsushita Electric Works, MacPherson Kwok Chen & Heid, Gideon Gimlan, February 28, 2006: US07006938 (30 worldwide citation)

Reactive sensors typically exhibit nonlinear response to temperature variation. Systems and methods are disclosed for compensating for the nonlinear and/or temperature dependent behavior of reactive sensors and for calibrating the post-compensation output signals relative to known samples of the phy ...


2
Marcos Laraia
Jose Marcos Laraia, Masahisa Niwa, Robert P Moehrke, Jose G Taveira: Reactive sensor modules using pade approximant based compensation and providing module-sourced excitation. MacPherson Kwok Chen & Heid, December 22, 2005: US20050283330-A1

Reactive sensors typically exhibit nonlinear response to the combination of an excitational signal (e.g., sinusoidally oscillating signal) and a physical parameter under measure (e.g., position of magnetic core member). Such sensors are typically sensitive to temperature variation. Systems and metho ...


3
Masahisa Niwa: Position sensor to compensate for change of temperature coefficient of impedance of a detection coil. Matsushita Electric Works, Greenblum & Bernstein, June 21, 2005: US06909279 (15 worldwide citation)

A direct current and an alternate current are simultaneously supplied from a constant current circuit to a detection coil. At least one of the ratio of the direct current to the alternate current, the ratio of an alternate current component to a direct current component of an impedance in a detectin ...


4
Masahisa Niwa, Kunitaka Okada, Fumihiro Kasano, Sukoya Tawaratsumida: Proximity sensor. Panasonic Corporation, McDermott Will & Emery, April 30, 2013: US08432169 (8 worldwide citation)

A proximity sensor has an oscillation circuit, an amplitude measurement circuit, a control circuit and a signal processing circuit. The oscillation circuit has an LC resonant circuit and an oscillation control circuit that is configured to supply an electric current to the LC resonant circuit to gen ...


5
Masahisa Niwa: Displacement detector. Matsushita Electric Works, Cheng Law Group PLLC, March 31, 2009: US07511477 (4 worldwide citation)

The present invention is directed to a displacement detector which can compensate a change in temperature coefficient of impedance of a coil to a displacement of a core. The detector comprises a constant-current supply unit for outputting a constant current including an alternating current, a coil p ...


6
Norimi Asahara, Yukiko Nishida, Masahisa Niwa: Displacement sensing device. Toyota Jidosha Kabushiki Kaisha, Panasonic Corporation, Oblon Spivak McClelland Maier & Neustadt L, July 17, 2012: US08222895 (3 worldwide citation)

A compact sensing device capable of sensing a rotational angle and a rotational velocity, or a rectilinear moving distance and a moving velocity. A displacement sensing device that senses a rotational angle of a moving member rotation and a distance of a linear movement of the moving member, or sens ...


7
Masahisa Niwa: Proximity sensor. Panasonic Corporation, Cheng Law Group PLLC, April 17, 2012: US08159234 (2 worldwide citation)

A proximity sensor includes an L-C resonator, an oscillator for oscillating the L-C resonator, an oscillation detector, an output circuit, and a burnout detecting means. The L-C resonator has a detection coil for detecting an object, and a resonant capacitor connected across the detection coil. The ...


8
Masahisa Niwa, Yukiko Inooka: Position sensor having tubular detection coil. Panasonic Electric Works, Greenblum & Bernstein, March 16, 2010: US07679361 (1 worldwide citation)

A compact position sensor with high operational reliability is provided. This sensor has a tubular detection coil, a magnetic core movable in the detection coil, a drive circuit for the detection coil, a signal processing circuit for converting a change in impedance of the detection coil into an ele ...


9
Masahisa Niwa, Kunitaka Okada, Itsushi Tadamasa: Physical quantity measurement device. Panasonic Corporation, Cheng Law Group PLLC, January 1, 2013: US08346494 (1 worldwide citation)

The physical quantity measurement device involves a terminal unit, a sensor, a storage unit, an output unit, a communication unit, a control unit, and a discriminating unit. The terminal unit has a power terminal, an output terminal, and a ground terminal. The communication unit uses the power termi ...


10
Fumitaka Saito, Masahisa Niwa: Load sensor, load detector including load sensor, and method for detecting load. Panasonic Intellectual Property Management, McDermott Will & Emery, October 10, 2017: US09784627

A load sensor includes a core having a hollow part provided therein and containing magnetic material and a coil attached to the core. A magnetic path along which a magnetic flux generated by a current flowing in the coil is formed along a circumference direction of the hollow part. The core has a lo ...