Hitachi, Ltd.

Nec Corporation

Takahiro Nishimura

Makoto Hirose

Masanao Terada

Hajime Urai

Toshiaki Sakuyama

Ryoichi Shiobara

Yuichiro Yamane

Jun Nukaga

Hideyuki Kotsuji

An object is to enhance direct-current insulating performance of a gas-blast circuit breaker. The gas-blast circuit breaker includes: a pair of main contacts disposed in a gas tank to face each other and configured to operate for opening and closing a circuit; a pair of arc contacts disposed to face each other and configured to operate for opening and closing the circuit, the arc contacts being disposed coaxially with the main contacts at locations close to the centers of the main contacts, respectively; and an elastic electrically conductive material disposed on an outer surface of an insulating nozzle facing an inner surface of one of the main contacts.

Gas-blast circuit breaker

A gas circuit breaker includes a gas suppresser composed of a protruded portion which is formed on a horizontal surface facing an exhaust cylinder of a shaft guide and which forms a gap between itself and the exhaust cylinder and an enlarged portion which is adjacent to the protruded portion and where a gap to the exhaust cylinder is enlarged so that the shaft guide, which operates along an inner circumferential surface of the exhaust cylinder, which is provided to an inner circumferential portion of a movable side main conductor and is provided to outer circumferences of an exhaust shaft and an operation rod, and couples the operation rod with the exhaust shaft, is axially adjacent to a sliding member that slides along the exhaust cylinder with no space to the exhaust cylinder and suppresses discharge of heated and pressurized insulating gas.

Gas circuit breaker

An autonomous mobile robot includes a target acquisition unit which acquires a target by using an image obtained by an imaging unit whose field of view is able to be changed, a target movement prediction unit which predicts the destination of the target by using the image of the target, an obstacle movement prediction unit which predicts the destination of an obstacle by using an image of the obstacle, an occlusion determination unit which determines whether or not the target is occluded by the obstacle from result of the prediction by the target movement prediction unit and result of the prediction by the obstacle movement prediction unit, and a target tracking unit which changes the field of view of the imaging unit so that the area of the target coming into the field of view increases in the case where it is determined that at least a part of the target is occluded by the obstacle.

Autonomous mobile robot, and method and program for controlling the same

In order to solve the above-described problems, a gas circuit breaker of the present invention has an insulating nozzle disposed so as to cover an inner surface of a coupling member such that an end surface of the coupling member and an end surface of the insulating nozzle form one surface (the end surface of the coupling member is flush with the end surface of the insulating nozzle), in order to suppress contact between a high-temperature and high-pressure gas generated by an arc and the coupling member coupling the insulating nozzle and a driving rod.

To provide a gas circuit breaker designed to achieve further improvement in interruption performance for a small to medium current. The gas circuit breaker according to the present invention includes: an operation mechanism; a heat puffer chamber; a machine puffer chamber; a release valve; a movable main contactand movable arc contact; a stationary main contactand stationary arc contact; a movable-side leading conductor; and a stationary-side leading conductor, and features: a separation cylinderfor radially partitioning the heat puffer chamber; an inner circumferential flow pathformed on an inner circumferential side of the separation cylinder; and a check valvefor opening or closing a communication hole

An object of the present invention is to provide a DLL circuit adjustment system that can adjust the sampling timing of a DLL circuit without causing any increase of the number of interface signals or amount of coding overhead and any reduction of the data transfer efficiency. On a transmitter side, an ECC generating section adds an error detection/correction code to transmission data and outputs the transmission data with the error detection/correction code. Of output channels of the transmission data from the ECC generating section, a data bit associated with the DLL circuit to be adjusted is replaced with a sampling timing adjustment pattern using a to-be-adjusted channel selection circuit and a selector, and the resulting transmission data is transmitted to a receiver side. On the receiver side, the transmission data is received via a DLL circuit provided for each channel of the received transmission data, and an error detecting/correcting section corrects any error in the output of each DLL circuit, thereby forming received data. In this way, normal data transfer can be maintained while adjusting the sampling timing of each DLL circuit.

System for adjusting sampling timing of DLL circuit, method therefor and transmitter-receiver used therefor

An object of the present invention is to provide a data transfer system capable of maintaining synchronization of the data during the operation of apparatus by performing the periodical adjustment for a DLL circuit without using a method of 8B10B. In a transmitting apparatus, a control portion switches a selector to start a readjustment for the DLL circuit in a receiving apparatus, if a counter indicates a readjustment interval time. In performing there adjustment for the DLL circuit, a pattern generator sends a pattern making a signal waveform a stationary wave through the selector for a certain time, and if the signal is made stationary, a readjustment pattern is sent to the DLL circuit. The DLL circuit resets the sampling timing, based on this readjustment pattern. The selector switches the normal data A and the readjustment pattern to be sent to the DLL circuit.

Growing community of inventors

Tokyo, Japan

Takahiro Nishimura