Hitachi, Ltd.

Yuji Ichinose

Setsuo Arita

Hideaki Masuko

Shinji Murata

Yasuhiro Nakatsuka

Yoshikazu Ishii

Naoyuki Yamada

Hiroyuki Akiyama

Nao Saito

Daisuke Shinma

Wataru Kitaura

Shigenobu Yanai

Keigo Takeuchi

Daisuke Sinma

Kohyu Fukunishi

An object is to provide a radiation therapy system which can easily and accurately set an X-ray irradiation range. A movable X-ray diaphragm unithas, in its configuration, an X-ray shielding unit configured with a plurality of members, a driver for the X-ray shielding unit, and a position detector for acquiring a position of the X-ray shielding unit. It has displaysandwhich display a transmission image of a subject based on an output of an X-ray detection unit and a simulation image when the X-ray shielding unit is projected on the X-ray detection unitbased on an output of the position detector.

Radiation therapy system

Arrangements with wireless transmitter having: transmission operation processing unit allocating first header information (FHI) including physical address (PA) information to a header, allocates first data error checking code (FDECC) for detecting an error of FHI, second header information (SHI) as redundant header information of FHI, second data error checking code (SDECC) for detecting an error of SHI, divides data field into cell units, and adds third error checking code to each cell, to generate the communication frame; and a wireless transmission unit. A wireless receiver with: wireless receiving unit receiving the frame; reception operation processing unit checking if errors exists in FHI based on FDECC allocated to data field, and if an error, further checks if error in SHI based on SDECC, and if no error, generates a predetermined PA by using SHI, and judges if received communication frame is addressed to own wireless receiver based on generated predetermined PA.

Wireless communications device and wireless communications method

Disclosed is a wireless communications device with strong realtime performance, giving rise to no latency in communications even if communications errors arise in the communication frame MAC header. MAC header information is used to determine whether or not the destination address of a received data frame is the address of a concerned wireless communications device (). MAC header information allocated among a plurality of MAC headers is employed in selecting MAC header information without errors. If all MAC header information is in error, a majority determination processing unit () is used to effect a majority determination of the MAC header information and generate correct MAC header information. A received data extraction unit () removes the received frame header, etc., extracts the received data, and outputs same to an external device.

Using a network in which one master station modemand multiple slave station modemare physically connected by rudder connection or bus connection with a telecommunication line, the measurement result of the S/N ratio between the master station and slave stations is once collected in the master station at the initialization stage, pairs of the modulation method, by which all modems can demodulate at high probability, and transmission voltage are calculated based on this data, and the calculation is transmitted to all slave stations; and at a normal transmission stage, information regarding the coordination and control of the network is transmitted in accordance with this setting. Thus, one-to-multi communication is realized, guaranteeing an access right.

Control and monitoring telecommunication system and method of setting a modulation method

A communication apparatus installed in the trains and that in a complex station building, a station or a maintenance factory communication through feeders, trolley wires or third rails can communicate each other. The present invention can realize a low cost vehicle-facility intra communication system that provides various information services available in the train.

Communication apparatus, communication method and installation method of railway vehicle-facility intra communication system

A plurality of slave stations receive a plurality of apparatus information signals concerning apparatus to be controlled (or sensors), and a master station allots the apparatus information signals to time slots in a transmission path and receives a specified apparatus information signal with priority from the respective slave stations. A priority change information signal adder in the master station adds a priority change information signal for changing priority of the information signals transmitted from each slave station to an information transmission signal string containing a sync signal and various information signals transmitted to each slave station. A multi-element information signal separator/processor in the master station separates and processes the multi-element information signals transmitted from each slave station, on the basis of the priority change information signal. A detector/counter in each slave station detects the sync signal transmitted from the master station and counts the number of time slots following the sync signal. A transmission pattern reconstructor in the slave station reconstructs transmission patterns of the respective slave stations in accordance with the priority change information signal when a count value coincides with a predetermined value.

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Mito, Japan

Yuji Ichinose