Kawasaki Microelectronics, Inc.

Mitsubishi Electric Corporation

Asahi Seimitsu Kabushiki Kaisha

Honda Motor Co., Ltd.

Mitsubishi Denki Kabushiki Kaisha

Kawasaki Steel Corporation

Masayuki Ueno

Hiroyuki Nakamura

Yohei Sato

Masaki Kanehiro

Masatoshi Takada

Kenji Kaneko

Hiroshi Ogasawara

Homu Takayama

Satoru Nakai

Yuzuru Tone

Shotaro Yamazaki

Hisanori Yanagida

Munetsugu Hanji

Yosuke Ojima

Eisuke Horii

Kohei Akamine

Hiroyuki Iwasaki

Akira Wakabayashi

Takuro Shimizu

Tomoaki Kotaki

Shogo Nishizawa

Tatsuyuki Araki

Tomofumi Ishihara

Akira Mitamura

Tetsuji Honnami

Chie Serizawa

Hideo Sako

Hiroyuki Nakata

Atsuki Ohira

A vehicle brake system includes a first fluid pressure generating device for generating a fluid pressure according to a brake operating amount, a second fluid pressure generating device for generating a fluid pressure by moving a piston with an electric actuator, and a switching valve switchable between a first state allowing communication between the first fluid pressure generating device and a vehicle behavior stabilizing device and a second state allowing communication between the second fluid pressure generating device and the vehicle behavior stabilizing device. A control device places the switching valve in the second state during execution of automatic brake control, and places the switching valve in the first state when a predetermined abnormality occurs in the vehicle, except that the control device places the switching valve in the second state when an abnormality including inability of the second fluid pressure generating device to generate the fluid pressure occurs.

Vehicle brake system

A control device for a vehicle equipped with a steering system including a steering wheel (), a rack () for steering the wheels () of the vehicle, and a redundant arrangement for transmitting a displacement of the steering wheel to the rack, wherein upon detecting a failure in the redundant arrangement, the control device sets an upper limit speed to a first value in a first stage, and changes the upper limit speed from the first value to a second value smaller than the first value in a progressive manner in a second stage that follows the first stage.

Control device for vehicle

A system construction supporting apparatus searches through, when receiving an input for arranging a component on the system configuration diagram anew, association information in which combinations among components connectable to one another are described and extracts a component connectable to a component selected by the input, connects a display object of the selected component and a display object of the extracted component each other and arranges the display objects, and independently moves, when receiving an input for moving one of a plurality of display objects connected to one another and arranged on the system configuration diagram (Yes at step S), the display object designated by the input while deforming a connection line connecting the display object designated by the input and another display object connected to the display object while maintaining a connection relation between the display objects by the connection line (steps Sto S).

System construction supporting apparatus and system configuration diagram creating method

A shared-label extracting unit extracts a shared label to be associated with a device corresponding to a memory shared by a plurality of control devices. A shared-label write/read information generating unit identifies a control device writing data and a control device reading data with respect to the shared label by referring to a control program, and generates shared-label write/read information. A device batch assigning/associating unit sorts shared labels using the shared-label write/read information, and associates the shared label with an address of the device for each sort based on a result of determining a configuration of the control system.

Programming support apparatus, programming support method, program for causing computer to implement the method, and recording medium containing the program

A connection is made to one of a plurality of programmable controllers (hereinafter, 'PLCs') included in a control system in which the plurality of PLCs are connected to one another via one or more networks; the one of the PLCs is specified as an originating PLC; network configuration information of the control system and online connection paths to the PLCs included in the control system are collected; layout relationships among the networks as well as connection relationships of the PLCs and coordinates thereof are calculated based on the network configuration information and the online connection paths; and the results are displayed on a display means as objects.

Network PLC control system engineering configuration layout and connection path display

A high accuracy D/A converter includes D/A converter sections including 64 current cells for outputting a current corresponding to 1 LSB of 8-bit input data and a D/A converter section including 63 current cells, a reference current generating section for supplying the respective D/A converter sections with reference currents, and a decoder for activating each of the current cells from the D/A converter sections to the D/A converter section in the stated order in a cyclic manner when the 8-bit input data value is increased, and deactivating one each of the activated current cells from the D/A converter section to the D/A converter section in the stated order in a cyclic manner when the 8-bit input data value is decreased.

D/A converter

An error correction circuit and a folding ADC are provided. In the folding ADC, the range of the input voltage to an upper ADC circuit and to a lower ADC circuit is shifted by a predetermined voltage toward higher and lower electric potential sides. The error correction circuit outputs the conversion result of the upper bits as is, or corrects the conversion result of the upper bits by either subtracting or adding 1 from or to the conversion result of the upper bits in accordance with the least significant bit within the conversion result of the upper bits and in accordance with the polarity of a code having different polarities between a period in which the voltage level of one folding signal among a plurality of folding signals output from the folding circuit is higher than the center level and a period in which the voltage level is lower.

Error correction circuit and A/D converter

In an I/V converter circuit and a D/A converter, a wide pass band for signal can be obtained and current consumption can be reduced. A current is supplied through an input terminal to a first node, and a first bias current is supplied from a first bias-current generating circuit to the first node. The current supplied to the first node is mirrored to a second node, and a second bias current is supplied from a second bias-current generating circuit to the second node. A first control circuit controls first and second elements of a current mirror circuit so that the voltage of the first node is substantially equal to a bias voltage, a third element converts a current flowing therethrough to a voltage by using the bias voltage as reference, and a second control circuit controls the voltage output from an output terminal so that the voltage of the second node is substantially equal to the bias voltage.

I/V converter circuit and D/A converter

A central processor of a factory automation system which has an application program for issuing instructions to a plurality of controllers to in parallel and controlling the controllers to , a plurality of interface for connecting the application program and the controllers to , and interface control for dynamically increasing or decreasing the number of the interface in response to the number of the instructions issued by the application program to the controllers to in parallel.

Control method of factory automation system, recording medium recording a program therefor and central processor of factory automation system

A current/voltage converter includes a current source connected to a first node; a first transistor element connected between the first node and a power supply or ground; a second transistor element which is connected between a second node and the power supply or ground, whose control terminal is connected to that of the first transistor element; a first control circuit which controls the voltages of control terminals of the first and second transistor elements so that the voltage of the first node becomes substantially equal to that of a bias voltage as one of inputs to the first control circuit; a second control circuit controlling the voltage of the second node so as to become substantially equal to that of the first node; and a resistance element one end of which is connected to the second node, and which converts the current flowing through the second transistor element into a voltage.

Current/voltage converter and D/A converter

The charge stored in a hold capacitor is prevented from leaking via the switches connected to the electrode of the capacitor, in a sample-and-hold circuit, and the reduction in the voltage held in the capacitor is suppressed, thereby improving the performance of the sample-and-hold circuit. The switches connected to the capacitor comprises two N-channel MOS transistors that are connected in series and are simultaneously turned on or off. During the period that the switches are in the OFF state, the potential at the interconnection node of the two transistors (one end of a first transistor) is set so as to be equal to that of the other end of the first transistor. Since the potential difference between both ends of the first transistor thereby becomes zero, leakage currents via the first transistor is reduced, and charge leakage in the capacitor can be prevented.

Sample-and-hold circuit

Measurement surveying device

A reference voltage generating circuit outputs a reference voltage (used for comparison of magnitude with an analog voltage) at a plurality of levels by using a differential amplifier to amplify voltages at nodes formed by mutually adjacent resisters among a plurality of resistors comprising a ladder resistor unit which is optionally selected by a decoder and an analog switch unit.

Reference voltage generating circuit

Electronic measurement device

Growing community of inventors

Tokyo, Japan

Masayuki Ueno