Nec Corporation

Square Co., Ltd.

Nec Toshiba Space Systems, Ltd.

Nec Space Technologies, Ltd.

Kazuhiko Aoki

Yoshiho Yanagita

Koji Kudo

Takahiro Toizumi

Hisato Sakuma

Hitoshi Yano

Eisuke Saneyoshi

Ryo Hashimoto

Masahiko Ohta

Yuma Iwasaki

Fujio Okumura

Osamu Ishibashi

So Nishimura

Keizo Kokubo

Shuichi Ohkubo

Tomohiro Hamada

Hidehiko Kuroda

Kazuyuki Egashira

Hisaya Niizawa

Daisuke Eto

Takeharu Shibatoko

Toshihiro Kurii

Isamu Kumihashi

A battery control device controlling an operation of a battery connected to a power system includes detection means that detects battery-related information that shows a state of the battery, or a voltage of an interconnection point of the power system and the battery, first communication means that transmits a detection result of the detection means to an external device, and receives operation control information to control the operation of the battery from the external device, and control means that controls the operation of the battery, based on a state of the power system and the operation control information received by the first communication means.

Battery control device, battery control support device, battery control system, battery control method, battery control support method, and recording medium

A supply-and-demand adjustment system, that utilizes characteristics of supply-and-demand adjustment apparatuses and precisely matches a total supply-and-demand adjustment amount with a required adjustment amount when performing a supply-and-demand adjustment. The supply-and-demand adjustment system comprises a central control apparatus and one or more supply-and-demand adjustment apparatuses, the central control apparatus includes a state collection unit that collects information with regard to a state of each supply-and-demand adjustment apparatus, an allocation band calculation unit that calculates a frequency band and an intensity of a fluctuation of a supply-and-demand adjustment to be allocated to each supply-and-demand adjustment apparatus based on the information of the state, and an adjustment amount calculation unit that calculates a supply-and-demand adjustment amount for each supply-and-demand adjustment apparatus based on the frequency band and the intensity of the fluctuation of the supply-and-demand adjustment to be allocated to said each supply-and-demand adjustment apparatus.

Supply and demand adjustment system, supply and demand adjustment method, and supply and demand adjustment program

It is an object of the present invention to drive a mirror in a wide driving range and at a fast response speed. An imaging deviceincludes an imaging element, a mirror, a lens, and a mirror tilt actuator. The imaging elementimages subject light that is reflected light from a subject. The mirrorreflects the subject light, and makes the subject light incident on the imaging element. The lenscollects the subject light on the mirror. The mirror tilt actuatordrives the mirrorso as to change an optical axis of the lens OAL. The optical axis of the lens OAL is an optical axis to be incident on the central part C of the imaging elementin the subject light exited from the lens

Imaging device including a control unit configured to counteract vibration

A power flow control system is provided that is capable of improving the reliability of controlling power flow fluctuation and creating wide applicability for systems that control power flow fluctuation. A power-varying device () varies the distribution line power amount, which is a value of the power flow that flows in a distribution line () to which is connected a plurality of power sources () that each generate power. A measurement device () measures an index value relating to the total generated power amount, which is the sum total of the amount of power generated by each of the power sources. A calculation device () estimates the total generated power amount from the index value, and according to the estimation result, regulates the amount of change in the distribution line power amount that is changed by the power-varying device.

Power flow control system and power flow control method

A supply and demand adjustment system, that utilizes characteristics of a supply-and-demand adjustment apparatuses and precisely matches the total supply-and-demand adjustment amount with a required adjustment amount, when adjusting supply and demand, is provided. The supply and demand adjustment system that includes a central control apparatus and one or more supply-and-demand adjustment apparatuses, the central control apparatus including, supply-and-demand-adjustment-apparatus-state-collection unit that collects information with regard to a state of each supply-and-demand adjustment apparatus, allocation band calculation unit that calculates a frequency band and an intensity of a fluctuation of supply and demand adjustment to be allocated to the supply-and-demand adjustment apparatus based on the information of the state, and a supply-and-demand-adjustment-amount-calculation-unit that calculates a supply-and-demand adjustment amount for each supply-and-demand adjustment apparatus based on the frequency band and the intensity of the fluctuation of supply and demand adjustment to be allocated to the supply-and-demand adjustment apparatus.

There have been problems that a capturing device requires an optical source having a large power output, and a scanning operation and a capturing operation must be alternately performed by the respective devices. A capturing device is provided with an optical receiver which receives a beam from outside as a reception beam, a reception beam capturing unit which performs a capturing operation by which the reception beam is introduced to the optical receiver, an optical transmitter which generates a transmission beam transmitted to the outside, a transmission beam scanning unit which performs a scanning operation of the transmission beams, and an optical circulator wherein the incidence of the reception beam and the exit of the transmission beam are performed at the same terminal.

Capturing device, capturing method, and capturing program

A projector includes a screen having a periodic array of color stripes for producing visible light depending on incident light, a light source that remits a light beam, a projection unit that scans an area of the screen where the color stripes are disposed, with the light beam in a direction across the color stripes, to display an image on the screen, a detector that detects the visible light from each of the color stripes as a feedback light pulse, and a controller that adjusts a start-of-emission timing of the light source based on a start-of-detection timing at which the feedback light pulse is detected by the detector and a detection period during which the feedback light pulse is detected by the detector, and controlling the light source to emit the light beam in order to apply light pulses to the color stripes within boundaries thereof.

Projector and control method

A fluorescent screen includes a phosphor layer including a phosphor that absorbs excitation light to emit fluorescence, a reflecting layer that is provided on one surface of the phosphor layer so as to transmit the excitation light and to reflect, to the phosphor layer, a part of fluorescence that is emitted from the phosphor and that exits from the one surface; and a plurality of holes that penetrates the reflecting layer.

Fluorescent screen and image display device comprising same

An image display device includes: excitation light source (), fluorescent screen () provided with a plurality of phosphor regions () that are arranged periodically in the in-plane direction, the regions between phosphor regions being retroreflective regions () that bend incident light in the direction opposite the direction of incidence of the light; scanning means () that scans fluorescent screen () with a light beam from excitation light source (); optical detection means () that detects retroreflective light () that is reflected by retroreflective regions (); and control means () that causes scanning by scanning means (), detects boundaries between each phosphor region () and retroreflective region () on fluorescent screen () based on output of optical detection means (), and controls the light emission timing of excitation light source () based on the detected boundaries.

Image display device and light emission timing control method

A projection screen includes: phosphor regions arranged cyclically in an in-plane direction of a display region; a plurality of black stripes and reference black stripes that partition the display region into the phosphor regions; and an optical information formation unit that is provided in a specific position within the display region and that generates readable optical information.

Projection system, projection-type image display device, and multi-projection system

A fluorescent screen includes phosphor regions-R,-G, diffusion region-B and reflecting meansformed on a region that includes phosphor regions-R and-G and diffusion region-B. Reflecting meansincludes fluorescent light reflecting layer, phase difference layer, and polarizing layerdeposited in that order. Fluorescent light reflecting layertransmits excited lightand reflects fluorescent light from phosphor regions-R and-G. Polarizing layerboth transmits excited lightand, of diffused light of the excited light () that was entered from diffusion region_B through Phase difference layer, transmits TM polarized light and reflects TE polarized light.

Fluorescent screen and image display device provided with same

A motor control apparatus that controls the rotational angle of a motor () which drives a rotating body () includes a synchronizing means () for generating and outputting an interrupt signal () based on an external reference signal () input from outside and a rotating body reference signal () generated by the rotating body, and a controlling means () for computing a command value for making the rotational angle of the motor follow a target rotational angle and outputting the command value to the motor each time the interrupt signal is inputted. The synchronizing means () changes the output period of the interrupt signal () in accordance with a time difference between the external reference signal () and the rotating body reference signal ().

Motor control apparatus, motor control method, motor system, and computer-readable medium

An image display device includes an excitation light source; a fluorescent screen including a plurality of phosphor regions that are repeatedly formed in an in-plane direction and a retro-reflection region that reflects a part of incident light in the opposite direction of the incident light; a scanning unit that scans a surface of fluorescent screen on which the phosphor regions and the retro-reflection region are formed with excitation light from the excitation light source; a photo detection unit that outputs signal value that varies on the basis of an incident light amount onto the photo detection unit; a reflection unit that reflects retro-reflection light of the excitation light directed from the retro-reflection region to the photo detection unit; and a control unit that causes the scanning unit to scan the fluorescent screen, detects boundaries between the phosphor regions and the retro-reflection region on the fluorescent screen.

Image display device

A three-phase motor control apparatuscontrolling a driver which drives a three-phase motor includes: a desired rotation angle generation sectionwhich generates a desired rotation angle; a rotation angle detectorwhich detects a detected rotation angle which is the rotation angle of said three phase motor; a feedback controllerwhich generates a q-axis command reference value which controls the q-axis voltage or the q-axis current of the three-phase motorin response to the desired rotation angle and the detected rotation angle; a drive torque correction section and an adderwhich generate a q-axis command value by correcting the q-axis command reference value; and a two-phase to three-phase transformation sectionwhich generates a control signal which controls the driver circuitwhich drives the three-phase motor in response to the q-axis command. The drive torque correction sectionincludes an angle look-up tablewhich contains elements respectively associated with angle ranges defined for the rotation angle of the three-phase motor, and selects any of the elements in response to the detected rotation angle. The q-axis command is generated by correcting the q-axis command reference value based on the value of the selected element.

Three-phase motor controller, three-phase motor system, three-phase motor control method and program

A fast steering mirror has n plate springs (to) and m drive means (to). The plate springs (to) are arranged such that a cross-sectional plane passing through the center of the thickness of each of the plate springs is on the same plane as the reflection surface of a mirror (), and are arranged rotationally symmetric to each other about the center (O). The plate springs each have a section extending along the circumference of the mirror holder, the section being obtained by dividing the perimeter of the mirror holder substantially into n sections. The drive means (to) are arranged such that a cross-sectional plane passing through the center of torque generated by each of the drive means is on the same plane as the reflection surface of the mirror () and are rotationally symmetric to each other about the center (O).

Growing community of inventors

Tokyo, Japan

Kazuhiko Aoki