Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Disco Corporation

Kenichi Fujie

Katsuya Tsujimoto

Takamasa Asai

Takayuki Yamamoto

Yoshiyuki Fujii

Hisashi Ishikura

Naruki Suetake

Isao Tottori

Tomoko Konda

Kazuki Terada

Akinobu Sugiyama

Zhibo Su

Shogo Matsuoka

A blade holding jig for holding a washer-type cutting blade via an annular retainer flange includes an annular flange holding portion configured to hold a first annular surface of the retainer flange under suction, and an annular non-contact suction portion arranged on an outer peripheral portion of the flange holding portion and configured to produce a negative pressure by ejection of a fluid toward the outer peripheral portion of the retainer flange held by the flange holding portion and to draw up the cutting blade toward the retainer flange. The cutting blade drawn up toward the retainer flange by the non-contact suction portion is held on the retainer flange by a suction force acting from the flange holding portion via a plurality of through holes disposed extending from a second annular surface to the first annular surface of the retainer flange.

Blade holding jig

The present invention is an SPI-communication-method communication apparatus that has a plurality of slave communication units for a single master communication unit and an electric power converter utilizing the communication apparatus; the master communication unit outputs communication signals simultaneously to all of the slave communication units and separately reads respective data signals outputted by the slave communication units, in accordance with a priority.

Communication apparatus

In a rotation angle detection device for detecting a rotation angle and a rotation speed of a motor generator by using a resolver, a resolver detection accuracy is improved by raising the amplitude or frequency of an excitation signal when the motor generator is performing a driving operation. Furthermore, by reducing the amplitude or frequency of the excitation signal when the motor generator is not performing a driving operation, it is possible to suppress the amount of heat generated by the excitation circuit and the resolver, while maintaining a resolver detection accuracy that enables information about the rotation speed of the motor generator to be obtained.

Rotation angle detection device and rotation angle detection method

A power conversion device has an internal power supply switch and a bias power supply switch connected in parallel with the internal power supply switch, wherein, when an output voltage of an internal power supply circuit is greater than a predetermined value when a power supply is started up, the bias power supply switch opens a current path, and when the power supply is stopped, the step-up power supply circuit is stopped based on a stop signal output by the internal power supply circuit and the internal power supply switch closes the current path, and when the output voltage of the internal power supply circuit becomes lower than a predetermined value, the bias power supply switch closes the current path.

Power conversion device

Provided is a power conversion device, including a fault determination unit () for determining, based on phase voltages of a polyphase dynamo-electric machine () detected by phase voltage detection units (), a power, earth, or open fault of armature windings of the polyphase dynamo-electric machine (). The fault determination unit () determines, in a state that all power semiconductor switching elements () are in an off state and no induction voltage is generated in the armature windings of the polyphase dynamo-electric machine (), the power fault when all the phase voltages are substantially equal to an anode potential of a DC power supply (), the earth fault when all the phase voltages are substantially equal to a cathode potential of the DC power supply (), and the open fault when all the phase voltages are not substantially the same potential.

Power conversion device and method for diagnosing failure thereof

The present invention relates to a diagnosis apparatus for a field winding type rotating electric machine. The diagnosis apparatus includes an internal power supply circuit having an open fault determination potential, and determines, on the basis of a measurement result of a voltage value of a circuit that includes the field winding in a fault diagnosis condition, that a disconnection has occurred in the circuit when the measurement result is within an open fault determination voltage range including the open fault determination potential, that a power fault has occurred in the circuit when the measurement result is within a power fault determination voltage range including the positive electrode potential, and that an earth fault has occurred in the circuit when the measurement result is within an earth fault determination voltage range including the negative electrode potential.

Diagnosis apparatus for field winding type rotating electric machine and diagnosis method for field winding type rotating electric machine

The present invention has: a pump capacitor (), which has one end thereof connected to the source power supply (B) side via a diode (), and which has the other end thereof connected to two kinds of voltage sources via switches (); and an output capacitor (), which has one end there of connected to a high-potential terminal of a pump capacitor via a diode (), and the other end thereof connected to a source power supply. A filter circuit configured with a resistor () and a capacitor () is provided between the source power supply and the diode ().

Charge pump circuit

A current limiting device includes a switching portion, a reflux portion connected to a connection point of the switching portion and an output terminal, and supplying a current to a motor generator while the switching portion is cutting off the current, a current measurement portion that measures the current flowing from the output terminal to the motor generator, and a current control portion that controls the switching portion to switch ON/OFF according to a current value measured by the current measurement portion. When the motor generator is motor-driven using electric power of a condenser, the current control portion limits the current to the motor generator by controlling the switching portion to switch ON/OFF in a case where the measured current value is equal to or exceeds a predetermined current value.

Current limiting device for vehicle

An image input apparatus can acquire an image with a high contrast without saturating a camera output even for a subject having a large light and dark difference while achieving a wide dynamic range. An image sensor has an input-output characteristic varying with a plurality of regions delimited according to a difference in the amount of incident light. A video luminance signal level is detected from a video signal of the image sensor. An amount of light on a screen is calculated from the image luminance signal level. The image sensor is adjusted to make the amount of light on the screen coincide with a target light amount. The target light amount is set such that a relation between the target light amount R and an amount of light Q at a change point that is at the lowest luminance in an input-output characteristic of the image sensor satisfies R&#x3c;Q.

Image input apparatus

A vehicular auto light system is configured to calculate screen brightness on the basis of image data obtained from imaging means that images the outside of a vehicle, operate the imaging means and control imaging conditions with imaging condition control means such that the screen brightness becomes constant, estimate the amount of light around the vehicle with around-vehicle light amount estimating means on the basis of an operation amount of the imaging conditions, and turn lights of the vehicle ON or OFF on the basis of the light amount estimation result.

Vehicular auto light system

An imaging apparatus of a wide dynamic range can be achieved at low cost while making improvement in contrast and the maintenance or reduction of a circuit size compatible with each other. The apparatus includes a photoelectric conversion part that converts a signal from a light receiving element into a voltage in accordance with an amount of incident light, an analog signal processing part that processes an analog video signal output from the photoelectric conversion part, an A/D conversion part that converts the analog video signal into a digital video signal, and a high frequency emphasis part that emphasizes a high frequency component of the video signal. The high frequency emphasis part suppresses a low frequency component of brightness in the video signal to emphasize the high frequency component, whereby image data of good contrast can be obtained while keeping a dynamic range of the signal.

Video imaging apparatus having non-linear input-output characteristic for improved image contrast control

A lane recognizing image processing system for recognizing lane markings laid on a driving road for motor vehicles includes a lane marking candidate point extraction means () for extracting lane marking candidate points (C) from an image (G) taken by an image pickup means () mounted on the motor vehicle, and a lane recognizing means () for recognizing a lane defined on the road on the basis of set of the lane marking candidate points (C). The lane recognizing means () includes a lane marking candidate point position converting means () for recognizing as lane marking candidate point positions the positions of the lane marking candidate points (C) transformed onto a straight line extending toward a null point.

Lane recognizing image processing system

A lane recognition image processing apparatus can improve lane marking recognition performance by preventing false detection by addition of a condition without changing the basic principle of an one-dimensional image filter. A search area is set for each lane marking with respect to images stored in a image storage part through a window. A candidate point extraction part extracts candidate points of each lane marking from the search area thus set. A lane marking mathematical model equation is derived by approximating sets of extracted candidate points by a mathematical model equation. The candidate point extraction part includes a kernel size setting part, a filtering part that outputs, as a filtering result, the smaller of differences between the gray value of a pixel of interest and those of pixels forwardly and rearwardly apart a kernel size from the pixel of interest in a scanning direction, respectively, and a binarization part that binarizes the filtering result.

Growing community of inventors

Tokyo, Japan

Kenichi Fujie