Hitachi, Ltd.

Atsushi Kawabata

Shinya Tanifuji

Korefumi Tashiro

Kenji Oguma

Michio Fujiwara

Hiromi Inaba

Kimiya Yamaashi

Norito Watanabe

Yoshinori Ohkura

Shuuichi Miura

Nobuhisa Motoyama

Kenichi Yamashita

Yuji Taki

Yasuo Morooka

Yoshiki Kobayashi

Masayuki Tani

Tsugio Tomita

Toshio Sakai

Akihiro Sakamoto

Kinya Nakatsu

Takeshi Tokuyama

Koichiro Tanikoshi

Takanori Yokoyama

Masayasu Futakawa

Masakazu Yahiro

Yoshiaki Usami

Kazuo Kera

Kunio Nakanishi

Kengiro Sato

Yasuo Sasaki

Kazunari Maeda

Masaki Katahira

Satoru Murata

Naomi Yamazaki

The present invention provides an electric circuit device in which it is possible to achieve simultaneously the improvement of cooling performance and reduction in operating loss due to line inductance. The above object can be attained by constructing multiple plate-like conductors so that each of these conductors electrically connected to multiple semiconductor chips is also thermally connected to both chip surfaces of each such semiconductor chip to release heat from the chip surfaces of each semiconductor chip, and so that among the above conductors, a DC positive-polarity plate-like conductor and a DC negative-polarity plate-like conductor are opposed to each other at the respective conductor surfaces.

Electric circuit device, electric circuit module, and power converter

A train detection system includes transmitters receivers connected to a track circuit for transmitting and receiving a train detecting signal to and from the track circuit, and a control device on the ground, which transmits the train detecting signal to the transmitter and receives the train detection signal from the receiver. The transmitter adds a first unique code data to the train detecting signal received from the control device and transmits the same to the track circuit, and the receiver adds a second unique code data to the train detecting signal being added of the first unique code data received from the track circuit and transmits the same to the control device. The control device on the ground includes a storage portion and a collating portion which collates whether the first and second unique code data received from the receiver coincide with data stored in advance in the storage portion.

Train detection system and a train detection method

An elevator system in which a car travels upward and downward among a plurality of floors. The elevator system includes a first terminal having a wireless transmitting/receiving unit provided for at least one of the plurality of floors and a second terminal having a wireless transmitting/receiving unit associated with the car. A mobile terminal is provided which enables wireless transmitting/receiving of signals between at least the first and second terminals.

Elevator system utilizing wireless transmission units to exchange control information between elevator car and elevator control unit

A transmitter and receiver device used together with a control device provided on ground, which performs detection of a train, performs transmission and reception of a train detecting signal, and collates data added to a received train detection signal with predetermined data. A transmitter, to be connected to a track circuit, transmits a train detecting signal, to the track circuit, and a receiver, to be connected to the track circuit, receives the train detecting signal from the track circuit. The transmitter adds a first unique code to the train detecting signal transmitted from the control device provided on the ground and transmits the same to the track circuit. The receiver adds a second unique code to the train detecting signal which was the first unique code added thereto and received from the track circuit and transmits the same to the control device provided on the ground.

Transmitter and receiver device for train detection

An elevator system in which a car travels upward and downward among a plurality of floors. The elevator system includes terminals each having a wireless transmitting/receiving unit. One of the terminals is correspondingly provided for at least one of the plurality of floors and another of the terminals is correspondingly provided for the car and at least one of a counterweight. A mobile terminal is provided which enables wireless transmitting/receiving of signals between the terminals which are arranged within a predetermined distance of each other.

Elevator system having terminals with wireless transmitting/receiving unit

A train detection system and method in which a transmitter transmits a train detecting signal, a receiver receives the train detecting signal, and a control device on the ground which is connectable to the transmitter and transmits the train detecting signal to the transmitter and receives the train detecting signal from the receiver. The transmitter adds first unique code data to the train detecting signal transmitted from control device on the ground and the receiver adds second unique code data to the train detecting signal. The control device on the ground collates whether the first unique code data and the second unique code data received from said receiver coincide with predetermined data contents.

Train detection system and a train detection method cross reference to related application

A train detection system, having a transmitter which transmits a train detecting signal, a receiver, and a wayside controller connected to the transmitter and the receiver. The transmitter adds a first unique code assigned to the transmitter to the train detecting signal received from the wayside controller and transmits the thus processed train detecting signal and the receiver adds data of a second unique code to the train detecting signal and transmits the thus processed train detecting signal. The wayside controller includes a unique code checker for checking whether or not the first unique code and the second unique code agree with the contents of a predetermined code.

An elevator system in which a car travels upward and downward among a plurality of floors includes an elevator control unit and terminals each having a wireless transmitting/receiving unit. The terminals are provided for the elevator control unit and for each of the floors. Transmitting/receiving of signals between two of the terminals distant from each other is effected so as to at least enable wireless bi-directional communication between the two of the terminals distant from each other by relaying signals through another wireless transmitting/receiving unit of another of the terminals.

Elevator system with wireless elevator control transmit/receive unit

A train detection system, having a transmitter which transmits a train detecting signal, a receiver and a wayside controller connected to the transmitter and the receiver through a data transmission path. The transmitter adds a first unique code assigned to the transmitter to the train detecting signal received from the wayside controller and transmits the thus processed train detecting signal and the receiver adds data of a second unique code to the train detecting signal and transmits the thus processed train detecting signal. The wayside controller includes a unique code checker for checking whether or not the first unique code data and the second unique code data agree with the contents of predetermined data.

Train detection system

In order to make it possible to transmit and receive information between terminals and to reduce the number of wires used for an elevator in a building in an elevator system by transmitting and receiving information through wireless transmission even if a very weak radio wave having a narrow communicable range is used, an elevator control unit, a car terminal and floor terminals are individually provided with short distance wireless transmitting/receiving units having a communicable range of nearly a 2-floor distance (5 to 6 m) using very weak radio waves. The radio waves are received and transmitted between the wireless transmitting/receiving units located within the communicable range to transmit information by a relaying method of sequentially transferring information from terminal to terminal until it reaches a final destination.

Elevator system having wireless transmitting/receiving units

In a railway information transmission method and system wherein information is transmitted by a consecutive transmission mode between on-vehicle control equipment and ground control equipment, a redundant code which is updated in accordance with a predetermined procedure every transmission processing is affixed to information to-be-communicated, the information being then transmitted, and on a reception side, a logical operation is performed on the redundant code which is contained in the received information and a redundant code which is created on this side and which is updated in a predetermined procedure. Thus, the trouble of a transmission path can be simply found, and further, the safety. of train service based on an automatic train control or the like can be enhanced.

Railway information transmission method and system

A train detection system, including a transmitter, to be connected to a track circuit, which transmits to the track circuit a train detecting signal for confirming the existence of a train in the track circuit, a receiver, to be connected to the track circuit, which receives the train detecting signal from the transmitter through the track circuit, and a wayside controller. The wayside controller is connected to the transmitter and the receiver through a data transmission path, which transmits the train detecting signal to the transmitter and receives the train detecting signal from the receiver. The wayside controller includes a checker for checking whether or not the train detecting signal, which is received from the receiver, agrees with the contents of predetermined data.

In a railway information transmission method and system wherein information is transmitted by a consecutive transmission mode between on-vehicle control equipment and ground control equipment, a redundant code which is updated in accordance with a predetermined procedure every transmission processing is affixed to information to-be-communicated, the information being then transmitted, and on a reception side, the redundant code which is contained in the received information is correlated with a redundant code which is created on this side and which is updated in a predetermined procedure. Thus, the trouble of a transmission path can be simply found, and further, the safety of train service based on an automatic train control or the like can be enhanced.

A train detection system is capable of realizing reliable train detection with a train detection apparatus of simple construction using a track circuit. This is attained by a transmitter,adding data of a first unique code to a train detecting signal received from wayside controller,and transmitting it to a track circuit; a receiver,adding data of a second unique code to the train detecting signal added with the first unique code data received from the track circuit and transmitting it to the wayside controller,and the wayside controller,checking whether or not the data received from the receiver,agrees with predetermined data.

There are provided apparatuses for generating the motion path of an object. One apparatus includes an input unit for inputting information representative of the position of a start point of the motion of an object, at least one of the magnitude and direction of a velocity at the start point, an end point of the motion of the object, and at least one of the magnitude and direction of a velocity at the end point, and a calculation unit for calculating a motion path from the start point to the end point, in accordance with the information inputted to the input unit. As an alternative of the position and velocity of an object, the rotary angle and angular velocity of an object may be used to represent the facing direction of the object. Another apparatus includes a display device for displaying information of the position of an object and an icon representative of the time corresponding to the position of the object, and a calculator for calculating information representative of the motion path, in accordance with the information entered by the icon and information representative of at least one of the magnitude and direction of a velocity at the position of the object. The motion path is then displayed on the screen. The motion of an object can be easily defined and smoothly coupled to a succeeding or preceding motion on each key frame. The path and/or surface reflection attribute of an object can be defined with a small number of procedures.

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Hitachi, Japan

Atsushi Kawabata