Yokogawa Electric Corporation

Kabushiki Kaisha Toshiba

Waseda University

Kotaro Ogawa

Kazuma Takenaka

Minako Terao

Naoki Noguchi

Saki Kobako

Masaki Sato

Tatsuya Arai

Tetsuya Ishikawa

Kazuto Kuroda

Shinichiro Kosugi

Masahiro Sekino

Tomonao Takamatsu

Mitsunobu Yoshida

Takafumi Nakahama

Hideaki Yasui

Atsumi Kondo

Akinobu Nishikawa

Mai Honda

Masahiro Kurosu

Akihiko Ujiie

Satoshi Yoshitake

Hiroshi Kawarada

Keisuke Igarashi

Yukihiro Shintani

Fumitake Terao

Shigeki Kono

Masafumi Inaba

Mohd Sukri Shaili Falina Binti

Takuro Naramura

Sukri Shaili Falina Binti Mohd

A current measurement device (to) includes a first sensor (SE) 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 () that includes a cutout portion (CP) into which the measurement target conductor is inserted and in which the first sensor is accommodated, a fixing mechanism () 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 () configured to calculate a current flowing through the measurement target conductor based on a detection result of the first sensor.

Current measurement device

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.

Current measurement device for measuring currents flowing in mutually opposite directions

The current measurement device () includes a first sensor (SE) configured to detect a direct current magnetic field and a low-frequency alternating current magnetic field generated due to the current () flowing through the conductor (MC) to be measured, a second sensor (SE) configured to detect alternating current magnetic fields from a low frequency to a high frequency generated due to the current (I) flowing through the conductor to be measured, a first calculator (A) 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 (SE) and the conductor (MC) to be measured, a second calculator () configured to calculate the current flowing through the conductor to be measured from a detection result of the second sensor, and a synthesizer () configured to synthesize a calculation result of the first calculator with a calculation result of the second calculator.

Current measurement device, current measurement method, and non-transitory computer readable storage medium

A current measurement device (and) is for measuring a current (I) flowing through measurement target conductors (MCand MC), and the current measurement device includes: a plurality of triaxial magnetic sensors (, and) disposed so that a magnetic sensing direction and a relative position have a prescribed relationship; a noise remover () configured to remove noise components included in detection results of the plurality of triaxial magnetic sensors; a sign adder () 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 (and) 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.

A current measuring device () includes two triaxial magnetic sensors () that are arranged with a prescribed gap between the two triaxial magnetic sensors () such that magnetic-sensing directions of the two triaxial magnetic sensors () 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 () and a gap between the two triaxial magnetic sensors ().

Current measuring device, current measuring method, and non-transitory computer-readable storage medium

An electronic component includes a field effect transistor that functions as a working electrode of an ion sensor and a driving circuit that causes a potential difference between a source electrode and a drain electrode of the field effect transistor. A reference electrode potential of the field effect transistor is fixed.

Ion sensor, ion concentration measurement method, and electronic component

According to one embodiment, a vehicle-use storage battery system includes a storage battery, a main circuit, a circuit breaker, a storage battery management unit, a first determiner, and a second determiner. The main circuit is electrically connected to the storage battery. The circuit breaker is disposed between the storage battery and the main circuit to make or break the electrical connection therebetween. The storage battery management unit manages an operating state of the storage battery. The first determiner determines whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker. The second determiner determines, on the basis of at least one of operating states of the storage battery management unit, the first determiner, and the circuit breaker, whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker.

Vehicle-use storage battery system

According to one embodiment, a vehicular storage battery device includes a housing, battery boxes, and a common cooling passage. The battery boxes are disposed in the housing. Each of the battery boxes houses an electric cell as a vehicle power source and includes a heat transporting part transporting heat generated in the battery box to outside of the battery box. The common cooling passage is disposed in the housing. The common cooling passage is provided with an inlet for taking in a fluid and an outlet for discharging the fluid having passed through the passage. The inlet and the outlet are open in a direction different from a traveling direction of the vehicle. The heat transporting part of each of the battery boxes is exposed to inside of the passage.

Vehicular storage battery device

A vehicle system includes an instructing portion that issues open/close instructions for a charging disconnector, a discharging disconnector, and a pair of contactors. A diagnosis start determination portion determines a diagnosis start timing before entering a trolleyless section. A remaining battery capacity checks whether a battery unit has a battery capacity necessary in a trolleyless section travel. A relay operation check portion checks operability of a charging disconnector, the discharging disconnector, and the pair of contactors based on certain open/close states of a plurality of relays depending on the open/close instructions. An abnormality determination portion determines trolleyless section travel is not allowed when the relay operation check portion is incapable of checking operability or necessary remaining battery capacity, the remaining battery capacity check portion, the relay operation check portion, and the abnormality determination portion being operated when the diagnosis start determination portion determines that it is diagnosis start timing.

Vehicle system and control method therefor

Growing community of inventors

Tokyo, Japan

Kotaro Ogawa