Yokogawa Electric Corporation

Satoshi Yoshitake

Masaru Nakagomi

Kazuma Takenaka

Koji Akiyama

Ryuuta Tanaka

Masahiro Kazumi

Hiroshi Ikeda

Hiroshi Shimizu

Yoshiaki Tanaka

Makoto Imamura

Minoru Takeuchi

Hisashi Koaizawa

Kazuo Nagata

Nobuo Okabe

Naoki Noguchi

Hiroshi Akahori

Kotaro Ogawa

Minako Terao

Shumpei Ito

Syuhei Okada

Jun Murai

Saki Kobako

Kiyoshi Takai

Soichiro Torai

Toshio Sekiguchi

Fumitake Terao

Hirofumi Nakanishi

Satoshi Hamano

Hideaki Horie

Hironori Hayashizaki

A deep water drawing step of drawing deep water that exists in a deep region of the sea to a surface region of the sea with an upwelling pipe (); and a phytoplankton culturing step of culturing the phytoplankton in the upwelling pipe () are included to produce, as a basic producer of a food chain, a living marine resource, such as fishes and shellfishes, with phytoplankton produced in the phytoplankton culturing step.

Living marine resource production method and living marine resource production device

An estimation method includes: performing, for each different degree of degradation, regression analysis between a first value and a second value, wherein the first value is related to one or more reference feature points on a differential curve of a charging-discharging curve indicating a voltage value with respect to integrated current amount of a reference storage battery, and the second value is at least one of a capacity value of the reference storage battery and an internal resistance value of the reference storage battery; and estimating at least one of a capacity value of a target storage battery and an internal resistance value of the target storage battery, based on a result of the regression analysis and a third value related to one or more target feature points on a differential curve of a charging-discharging curve of the target storage battery.

Estimation method, estimation system, and non-transitory computer-readable recording medium

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

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.

Pipeline thickness measurement sensor device

The present invention is a power storage service system including: quantitatively grasping the time leading up to the expression of the abnormality; capable determining possible or impossible of avoiding stopping of the function of the assembled battery system. According to the invention, a maintenance operator and a maintenance service supplier of the assembled battery system have a time margin to plan a response schedule and to prepare responding, and it can reduce the cost of responding to the maintenance by reducing and optimizing the number of response. One aspect of the present invention is a power storage service system configured to control a power system using an assembled battery system including a plurality of unit cells, the power storage service system including: a first measurer configured to measure a self-discharge current difference among the plurality of the unit cells; and a second measurer configured to obtain a residual time of the assembled battery using the self-discharge current difference measured by the first measurer.

Power storage service system

A secondary battery capacity measuring system that estimates maximum capacities of other cells using characteristics of a deteriorated cell even when a charging process in the deteriorated cell having a smaller maximum capacity than the other cells in cells constituting a battery module ends and data for measuring the maximum capacities of the other cells cannot be acquired is provided.

Secondary battery capacity measuring system and secondary battery capacity measuring method

A battery monitoring device for real-time measurement and monitoring of a battery module driving an actual load and having a plurality battery cells connected together in series, has a plurality of power and impedance calculators provided for the respective battery cells, and configured to receive voltage signals and current signals from the battery cells, respectively and to measure instantaneous power values and internal impedance characteristics of the battery cells, respectively, and a battery module state manager configured to receive output data of the power and impedance calculators via an internal bus.

Battery monitoring device

A secondary-battery maximum-capacity measuring apparatus, includes: a current dependency processing unit configured to convert an inter-terminal voltage and an open cell voltage of a secondary battery into values without depending on a load current based on an amount of change in relative value of a voltage during a time period when a constant current is drawn from the secondary battery; and an error calculation unit configured to compute errors of the inter-terminal voltage and the open cell voltage of the secondary battery, the inter-terminal voltage and the open cell voltage being converted by the current dependency processing unit.

Secondary-battery maximum-capacity measuring apparatus

A wireless equipment diagnosis system which can perform inspection and maintenance precisely and accurately, and which comprises sensors which measure information on each equipment being diagnosed, a transponder which transmits measured data from the sensors after modulating the measured data; a portable interrogator which acquires the measured data by receiving transmitted signals from the transponder; and a host computer which diagnoses each equipment by implementing predetermined signal processing using information stored in advance and data transferred from the acquired data.

Wireless equipment diagnosis system

An optical laser frequency stabilizer which is simple, inexpensive, produces an unmodulated output, and a highly controlled oscillation frequency, wherein signals supplied to a master laser are modulated with a signal which is switched between four or more different levels to control the oscillation frequency of the master laser to the frequency of an absorption line; and wherein the beat frequency of signals from the master laser and a slave laser is counted by an up-down frequency counter in synchronism with the modulation signal and, in response to the obtained total count, the oscillation frequency of the slave laser is controlled to a frequency based on the center frequency of the oscillation of the master laser so that an unmodulated output is generated which is not affected by variations in the powers of the laser beams. The laser frequency can be offset from the frequency of the absorption line, and also the offset frequency can be varied continuously.

Optical laser frequency stabilizer

Growing community of inventors

Tokyo, Japan

Satoshi Yoshitake