Nec Corporation

Seikosha Co., Ltd.

Seiko Precision Inc.

Shingo Takahashi

Nobuhide Yoshida

Shigeru Koumoto

Yuan Luo

Noriyuki Itabashi

Sakae Tanaka

Junichi Miyamoto

Murtuza Petladwala

Aisaku Imanishi

Tomoaki Takahashi

Tadahiko Yamaoka

Ryota Suzuki

Kenichi Maruhashi

Shinya Ohhata

Junji Kogure

Kenji Kobayashi

Hiroshi Kajitani

Eisuke Saneyoshi

Kazuya Umeyama

Yuko Ohta

Yuichi Imamura

Yasuhiro Ishikawa

Sho Ohtani

Kazuaki Honda

Seiji Sanada

Provided an apparatus configured to calculate a periodicity of the time series data using at least one of a periodogram of the time series data and an autocorrelation of the time series data; generate a plurality of subsequences from the time series data, a length of each subsequence set to the periodicity, calculate feature values of the plurality of subsequences, and categorize the plurality of subsequences, based on the features values thereof, into one or more groups; and execute analysis of the time series data, based on the categorization result.

Periodicity analysis apparatus, method and program recording medium

Provided an apparatus configured to calculate a periodicity of time series data, generate a plurality of subsequences, from the time series data, a length of each subsequence set to the periodicity, calculate feature values of the plurality of subsequences; categorize the plurality of subsequences, based on the feature values thereof, into one or more groups, find a periodicity of the subsequences belonging in common to one group, based on an occurrence order of the subsequences belonging in common to the one group and perform missing event detection by identifying the subsequence, occurrence of which is expected according to the periodicity of the subsequences belonging in common to the one group, but not found.

Event monitoring apparatus, method and program recording medium

A feature transformation apparatus includes at least a combination storage part that stores a combination with respect to a set of features, wherein data is approximately represented as a sum of the combination of the features; and a transformation part that transforms at least the combination so as not to change the sum of the combination of the set of features.

Feature transformation apparatus and method, and recording medium

Provided a method including applying a Fourier Transform to an AC current waveform measured to perform conversion thereof to a frequency domain; adjusting entire phase components of frequency spectra obtained as a result of the Fourier Transform, such that a phase component of an AC power supply frequency becomes zero; and applying an inverse Fourier Transform to the frequency spectra with the entire phase components thereof adjusted to obtain a current waveform in a time domain.

Measurement apparatus and method

A maintenance monitoring apparatus includes: a maintenance management part that manages, based on a monitoring result of a current or power of a vending machine that provides a beverage by extracting the beverage from a raw material, whether an operation performed on the vending machine is a predetermined maintenance operation and whether the maintenance has been executed at an appropriate time interval and as many times as necessary; and a notification part that notifies that a maintenance has been executed or not.

Maintenance monitoring apparatus, system, method, and program

A control device of the present invention includes: an OCV estimating unit that estimates, based on a voltage value and a current value of a controlled device, an OCV of the controlled device; a capacity calculating unit that calculates an integrated capacity of the controlled device based on the current value of the controlled device; and a control unit that controls discharging and charging of the controlled device, and calculates a full capacity of the controlled device based on: a first SOC and a second SOC at a predetermined first OCV and a predetermined second OCV during the discharging or the charging of the controlled device; a first integrated capacity and a second integrated capacity at the first OCV and the second OCV during the discharging; and a third integrated capacity and a fourth integrated capacity at the second OCV and the first OCV during the charging.

Control device, control method, and recording medium

A charge and discharge device () includes: a battery unit () in which m (m is an integer of 3 or more) battery cells () that are connected in series are grouped into plural groups () including n (n is an integer equal to or larger than 2 and smaller than m) battery cells () that are continuously arranged and a part of the battery cells () that belong to a certain group is shared by a different group; a cell balance unit () that is provided for each group () and uniformizes voltages of the battery cells () that belong to the group (); and a control unit () that stops the operation of the cell balance unit (), when a voltage difference of the battery cells () that belong to an arbitrary one of the groups () is within a predetermined value, and when a total average voltage in all the battery cells () and a partial average voltage which is an average voltage of the battery cells () that belong to the arbitrary group () satisfy a specific condition, the cell balance unit () corresponding to the arbitrary group ().

Charge and discharge device, charge and discharge control method, and program

A power storage system comprises the following: a battery unit in which a plurality of battery cells are connected; an acquisition unit for continuously acquiring, while the battery unit is discharging, (V) which represents the extent of the discharge from the battery unit and the temperature (T) of the battery unit when the degree of discharge is (V); a balancing unit for executing cell balancing by which a difference in amount of charging between battery cells is reduced; and a balancing control unit for controlling the balancing unit so that when a reference state is detected based on (V) and (T), cell balancing is not executed, in accordance with a result of the detected reference state.

Method and program for controlling power storage system and storage battery

A battery control device includes: a measurement unit that individually measures an amount of discharging current of each discharging secondary battery of discharging secondary batteries among a plurality of secondary batteries which are independently charged and discharged; a time calculating unit that calculates time required for discharging said each discharging secondary battery until said each discharging secondary battery reaches a constant battery capacity based on a discharging current rate for said each discharging secondary battery which is calculated based on the amount of discharging current, and a state of charge (SOC) of said each discharging secondary battery; a number calculating unit that calculates an expected number of charging secondary batteries among said plurality of secondary batteries, which become fully charged in a required time, based on a charging current rate for each charging secondary battery of charging secondary batteries among said plurality of secondary batteries which is calculated based on an amount of charging current of said each charging secondary battery, a SOC of said each charging secondary battery, and the required time, and calculates a total value of the expected number and an existing number of said charging secondary batteries among said plurality of secondary batteries which are already fully charged; and a control unit that determines whether or not to raise the charging current rate based on the total value.

Battery control device, power storage device, power storage method, and program

A sensor system in which it is possible to identify a sufficient number of sensors even in a situation where the data length of a packet is limited, as well as a sensor and a receiving device in the same, are provided. A sensor repeating a measurement period for performing measurement and a transmission period for performing transmission at predetermined cycles, includes: a measurement section () that outputs during the measurement period measurement information based on predetermined measurement; and a transmission section () that transmits during the transmission period, by using a single packet or a plurality of packets, source identification information for identifying a source of a packet, the measurement information, and sensor-related information for identifying the sensor and/or a measurement target equipment of this sensor.

Sensor and receiving device in sensor system

A battery control device () includes: a measurement unit () that measures a voltage of a secondary battery; a control unit () that initiates a charging process of performing charging until the voltage of the secondary battery reaches a second reference value greater than a first reference value in a case where a voltage measured by the measurement unit () is less than the first reference value; and an adjustment unit () that receives a degree of deterioration of the secondary battery as first adjustment information that becomes a reference for adjustment of a hysteresis width that is determined on the basis of the first reference value and the second reference value, and adjusts the hysteresis width on the basis of the first adjustment information that is received.

Disclosed is a board including a semiconductor device including a first terminal to receive a signal that sets a functionality of the device, a second terminal to supply a first value and a third terminal to supply a second value, a first connection member connected to the first to third terminals of the semiconductor device, and a second connection member adapted to be connected to the first connection member provided on a counterpart board, with at least two terminals of the second connection member connected together via a first connection circuit, wherein the first connection member of the board is connected to the second connection member of another counterpart board.

Board, board apparatus and method for interconnection of boards

Provided is a power system that can arbitrarily set output power while stabilizing output voltages. Connection terminalsandof lower power sourcesandare connected to external connection terminalsin parallel. Voltage measurement sectionmeasures voltage values of external connection terminalsas measured voltage values. Power convertersandmeasure power supply capacities of lower power sourcesand, respectively. Output instruction sectionadjusts power or currents flowing through connection terminalsandbased on the measured voltage values and the power supply capacities so that the measured voltage values are included in a predetermined voltage range.

Power system and control method of the power system

The purpose of the present invention is to provide a processing apparatus, which operates using a power supply that asynchronously supplies and stops supplying power, and a processing method. A processing apparatus () of the present invention is provided with: a power supply monitoring unit (), which monitors power being supplied from a power supply that supplies power for a first period or more, at the time of supplying power of a first power value or more that is necessary for first processing, and which outputs first notification when the supplied power is at the first power value or more; and a processing unit (), which operates with the power supplied from the power supply, and when the first notification is received, which completes the first processing within the first period by transiting to a first operation state, wherein the first processing can be performed, from a standby state, wherein supply of power of the first power value or more is not needed.

Monitoring and controlling power supply apparatus and method

Provided is a storage battery device whose battery life can be prolonged further. Storage battery device having a plurality of storage battery cells connected in series includes monitoring unit that measures voltages via the terminals of the respective storage battery cells, and obtains degradation information indicating the degraded states of the plurality of storage battery cells based on the voltages, selection unit that selects at least one of the plurality of storage battery cells, power supply unit that supplies power to the storage battery cell selected by selection unit to charge the storage battery cell, and control unit that switches, based on the degradation information obtained by monitoring unit, a storage battery cell to be selected by selection unit, and adjusts the power supplied from power supply unit.

Growing community of inventors

Tokyo, Japan

Shingo Takahashi