Abstract: A 3D measuring apparatus is disclosed, in which a light beam is projected in such a manner as to raster scan toward a virtual surface. Specific data corresponding to the angle of incidence of the light beam is output, which light beam is reflected from an object of measurement at the time point of passing through each of a plurality of sampling sections into which the virtual surface is segmented in the main scanning direction X and the subsidiary scanning direction Y. With the position data Xg in the main scanning direction and the position data Yg in the subsidiary scanning direction for each sampling section as an address, the specific data are written in a memory. Also, the incident light beam is received by a photo-electric conversion device of one-dimensional position detection type, and the optical image of the object is compressed unidirectionally and formed on the photo-detection surface of the photo-electric conversion device.

Abstract: A control apparatus for a power converter having a plurality of semiconductor switching devices that converts DC power into AC power and outputs three levels of voltages, including a command voltage generator configured to output a command voltage vector that represents a voltage to be output from the power converter, an integrator configured to calculate a difference integral vector by integrating a difference between the command voltage vector and an output voltage vector that represents a voltage command for the power converter, a difference vector calculator configured to calculate difference vectors by subtracting the command voltage vector from each of the possible output voltage vectors, a vector selector configured to select one of the possible output voltage vectors which corresponds to one of the difference vectors making the largest angle with the difference integral vector as the output voltage vector only if the difference integral vector exceeds a predetermined value, and a gate signal generator

Abstract: An apparatus and method for detecting a three-dimensional image. The apparatus includes a projector which projects a reference light on an object; an image sensor which senses an image of the object; and a controller for controlling the projector and the image sensor, wherein the image sensor includes an aperture that restricts the passage of entering light; and an aperture controller for setting an aperture value for the aperture when receiving a two-dimensional image input, and setting an aperture value for the aperture when receiving a three-dimensional image input. The aperture value is set based on the intensity of received reference light. A processing unit determines the position of the object based on a relationship between an illumination direction of the reference light at the determined time center Npeak and an entrance direction of the reference light relative to the target pixel.

Abstract: A three-dimensional measurement apparatus includes an optical system for scanning a reference beam across a target object to be measured, a light sensor which receives light reflected from the target object, and a processor for calculating a three-dimensional shape of the target object from the received light. An image for calculating the three-dimensional shape of the target object and an image for displaying the target object are both captured by the same sensor. The displayed image is a grayscale image that is based on a centroid that is calculated from multiple data samples taken for each pixel in the image as the target is being scanned.

Abstract: A three-dimensional measurement device employs a slit ray projection technique to optically determine a three-dimensional image. The device offers a choice in operating modes between high-speed measurement, high-resolution measurement and large dynamic range in the depth direction, to accommodate various situations. The different modes of operation are achieved by selectively modifying one or more of the scanning speed of a projected reference beam, the readout speed of a photosensor, the line width or line spacing of the photosensor, and the number of lines per image frame.

Abstract: A series compensation generator SCG is installed in a transmission line that links various substations SS and the transmission capability of the system as a whole can be increased by regulating the equivalent reactance of the transmission line. Series compensation generator SCG generates a voltage of which the phase angle is shifted substantially 90° in relation to the current flowing in the transmission line, and it also generates a voltage that compensates the voltage drop due to the equivalent reactance. Also, when an electrical fluctuation phenomenon (power oscillation) occurs in the transmission line, it is possible speedily to suppress the power oscillation by detecting the power fluctuation of the transmission line and controlling the compensating voltage of series compensation generator SCG so that it suppresses that power fluctuation.

Abstract: In a three dimensional measurement system, a three dimensional pickup apparatus picks up an object repeatedly to generate image information including a shape of the object, and an information processor receives image frame signals and digital signals from the pickup apparatus to process the image information. Image information is sent as image frame signals through a first output terminal, and digital signals are sent through a second output terminal in correspondence to output of the image information through the first output terminal. In the information processor, an input controller receives the digital signals from the first output terminal and receives the image frame signals suitable for transmission of moving images in correspondence to the received digital signals from the second output terminal. For example, the pickup conditions for a next period are set based on the pickup information obtained in a current period.

Abstract: A power converting system has power converters for converting a direct current into an alternating current, a DC power source arranged on the DC side of the power converters, and voltage dividing transformers having windings whose first ends are connected to the power converters phase by phase and whose second ends are joined together and connected to a load phase by phase. Also provided is a controller for controlling the power converting system.

Abstract: A three-dimensional measuring system comprises an optical system for emitting a light and optically scanning an object, a measuring sensor having an image pickup surface consisting of a plurality of picture elements and adapted to receive the light reflected on the surface of the object, a galvanometer mirror for changing a direction in which the light irradiates the object, a system controller for driving the measuring sensor so as to allow the same to output information on the quantity of light incident on each of the picture elements, and a barycentric calculation circuit for finding an instant when the light traverses each of the picture elements. This instant is found by implementing a barycentric calculation on the basis of outputs of the measuring sensor taken for a prescribed period of time and an instant at which each of the outputs is taken. The measuring system further comprises a host computer for finding a position on the surface of the object corresponding to each of the picture elements.

Abstract: A power converter includes first and second power conversion units that are connected to each other by a d.c. reactor. The first power conversion unit is a converter in which arms consisting of thyristors are connected in a bridge configuration. The second power conversion unit is an inverter in which arms each of a series combination of a thyristor and a self-excited switch unit having a GTO for producing a commutation voltage for the thyristor are connected in a bridge configuration.

Abstract: In a three dimensional measurement system, a three dimensional pickup apparatus picks up an object repeatedly to generate image information including a shape of the object, and an information processor receives image frame signals and digital signals from the pickup apparatus to process the image information. Image information is sent as image frame signals through a first output terminal, and digital signals are sent through a second output terminal in correspondence to output of the image information through the first output terminal. In the information processor, an input controller receives the digital signals from the first output terminal and receives the image frame signals suitable for transmission of moving images in correspondence to the received digital signals from the second output terminal. For example, the pickup conditions for a next period are set based on the pickup information obtained in a current period.

Abstract: A power conversion system including a DC power source, a plurality of unit converters connected in parallel, each composed of a bridge connected switching devices, a plurality of DC reactors and a control circuit. The control circuit includes a conduction arm number calculating circuit for determining conduction arm numbers of the unit converters of each phase, each being determined based on a ratio of the current instruction value of respective phase and a mean value of the DC currents. The control circuit further includes a current balance control circuit for generating a plurality of conduction instructions for the switching devices at a time of change of one of the conduction arm numbers based on a first order of magnitude of the AC voltages, a second order of magnitude of the DC currents and the conduction arm numbers of each phase at that point.

Abstract: A control device for a power conversion system with a plurality of power converters, each of which is provided with a DC power source, a DC reactor and a unit converter composed of self-turn-off switching devices with DC terminals connected to the DC power source through the DC reactor, in which AC terminals of the plurality of unit converters are connected in common and is connected to an AC load. The control device includes a first unit for generating an instruction value vector for an AC output current of the power conversion system, a second unit for generating a set of actual value vectors showing all of the AC output currents that can be generated by the power conversion system, a third unit for selecting a closest actual value vector that is closest to the instruction value vector out of the set of the actual value vectors, and a fourth unit for controlling the self-turn-off switching devices in the unit converters in response to the closest actual value vector.

Abstract: A power generation system is constituted by an induction generator and a converter. An output current waveform of the induction generator is determined by the magnetic flux, speed, winding impedance, DC output voltage, and load of the induction generator. In particular, the output current waveform is changed in accordance with a change in speed (i.e., change in slip). Switching elements in the converter are ON/OFF-controlled in accordance with changes in current waveform, thereby controlling power generation of the induction generator.

Abstract: A power converting apparatus controls switching of self turn-off type semiconductor devices so as to perform power conversion. The apparatus comprises a plurality of switch units each having first and second self turn-off type semiconductor devices, first and second diodes, and a capacitor. The cathode of the first self turn-off type semiconductor device is connected to the anode of the first diode, and the cathode of the second diode is connected to the anode of the second self turn-off type semiconductor device. The capacitor is connected between a common junction between the cathode of the first self turn-off type semiconductor device and the anode of the first diode and a common junction between the cathode of the second diode and the anode of the second self turn-off type semiconductor device.

Abstract: A power generation system is constituted by an induction generator and a converter. An output current waveform of the induction generator is determined by the magnetic flux, speed, winding impedance, DC output voltage, and load of the induction generator. In particular, the output current waveform is changed in accordance with a change in speed (i.e., change in slip). Switching elements in the converter are ON/OFF-controlled in accordance with changes in current waveform, thereby controlling power generation of the induction generator.

Abstract: This invention relates to an electric braking and auxiliary engine mechanism for a motor vehicle including a rotary machine coupled with the crank shaft of the internal combustion engine which drives the axle of the vehicle. This mechanism is characterized in that squirrel-cage polyphase induction machine is used as the rotary machine which is fixedly connected to the crank shaft, and the squirrel-cage polyphase induction mechanism is fed with a revolving magnetic field which is variable either positive or negative direction by an invertor, so that the squirrel-cage polyphase induction machine may be utilized either as a power generator or a motor.

Abstract: An image input circuit, an image memory, an image processing circuit and an image output circuit are controlled by a host CPU through a host CPU bus and are connected by an image data bus so as to enable data transfer between each other. The image memory, image processing circuit and the image data bus for multiple-valued image and those for binary image are prepared. Consequently, storing, processing and transfer of multiple-valued image data and those for binary image data can be carried out independently from each other.

Abstract: This invention relates to an electric braking and auxiliary engine mechanism for a motor vehicle including a rotary machine coupled with the crank shaft of the internal combustion engine which drives the axle of the vehicle. This mechanism is characterized in that squirrel-cage polyphase induction machine is used as the rotary machine which is fixedly connected to the crank shaft, and the squirrel-cage polyphase induction mechanism is fed with a revolving magnetic field which is variable either positive or negative direction by an invertor, so that the squirrel-cage polyphase induction machine may be utilized either as a power generator or a motor.

Abstract: An induction system of the invention is adapted to apply coordinate transformation to the excitation current reference vector corresponding to the primary interlinkage magnetic flux vector reference value and the primary current vector so that they exist in the same coordinate system, thereafter to control the secondary current vector so that the primary interlinkage magnetic flux vector is in correspondence with the primary interlinkage magnetic flux vector, thereby allowing the primary side of the wound-rotor induction machine to function apparently as a voltage source.