Hitachi, Ltd.

Hitachi Building Systems and Engineering Service Co.

Nobuhisa Kobayashi

Katsumi Kawano

Toshihiko Nakano

Shigetoshi Sameshima

Masayuki Miyazaki

Kinji Mori

Motohisa Funabashi

Masaru Kokubo

Tohru Watanabe

Hirokazu Ihara

Yasuo Sato

Junichi Yamada

Hideyuki Nagaishi

Kenichi Mizugaki

Masato Utsumi

Masahiro Matsubara

Yasushi Harada

Setsuo Tsuruta

Keisuke Bekki

Masao Tsuyuzaki

Nobuyoshi Ando

Akio Nakano

Tatsuya Yoshikawa

Masaki Honma

Naohiro Yuasa

Nobuhiro Fujino

Katuaki Ikeda

Hiroyuki Seki

Masao Tada

Yuuichi Ootake

Naoki Mitsuyoshi

Chiemi Tsuchiya

Isamu Asahi

Kouzou Mabuti

A power demand adjustment system and method that controls a plurality of sub-aggregators and electrical devices in a customer's facility based on information collected by the power company and the sub-aggregators. The method and system includes a comparison of the power company and sub-aggregator data which enables accurate accounting and control of the customer's electrical devices.

Power demand adjustment system and power demand adjustment method

A wireless communication device includes a sensor processing unit that generates sensor data including a measurement result acquired by a sensor; a communication measurement unit that generates communication quality data including a communication state for transmitting a packet; a compression determination unit that determines compression rates of first sensor data and first communication quality data according to the contents of the first sensor data including the transmitted sensor data and the generated sensor data or the contents of the first communication quality data including the transmitted sensor data and the generated communication quality data; a compression unit that compresses the first sensor data and the first communication quality data according to the determined compression rates; and a wireless communication unit that transmits a packet including the compressed first sensor data and the compressed first communication quality data to another wireless communication device or the access point.

Wireless network system and wireless communication device

In distributed system for operating devices in association with one another, a device responsible for determining whether or not an access is permitted, and criteria for determination are hidden from accessing device or user, and flexible access control is provided among devices without need for previously defining accessible devices or user's identifiers. Communication process opens data communications which are interactions between devices to permit indefinite number of other devices to monitor data. A behavior monitoring process acquires interaction within particular device or between other devices in system for storage in behavior log table. Access control process matches the behavior log table with access control policy to determine whether or not device should be associated with target device from which process request is received, or with a target device to which a process program of the particular device attempts to access.

Open information based access control method

An appliance located states accumulating method includes the steps of, receiving state information indicating operating state changes of the appliances constituted of a distributed computer through a network, calculating an occurrence time difference from the state changes occurred in the appliances in accordance with occurrence time information indicative of occurrence times of the state changes included in the state information, and calculating the positional relation of the positions, where the appliances occur the state changes, from the calculated occurrence time difference, thereby accumulating the positional relation of the installed appliances.

Method of accumulating appliance located states and apparatus using the same

A system for managing energy consumption has a data storage module, a calculation module and an operation planning module. The data storage module stores an operational past record of a unit belonging to a facility to be managed by the system. The calculation module calculates wasteful energy consumption for the unit based on the operational past record stored in the data storage module. The operation planning module generates an operational plan for the unit belonging to the facility based on the wasteful energy consumption calculated by the calculation module.

Method, system and computer program for managing energy consumption

Access to restricted areas or devices are controlled by based on collecting information about the surrounding environment in connection with those restricted areas or service devices. Generally, one refers to service devices and access to service devices. Area access control can be viewed as being provided by a service device (e.g., an automated door or gate), access to which permits entry to (or exit from) a controlled area. Information about the surrounding environment includes, but is not limited to, the presence or absence of particular individuals, the presence or absence of other service devices, the location and/or proximity of other service devices, the location of the user requesting access to the service device, and so on. Based on knowledge of the surrounding environment, service access to the device can be permitted or denied.

Service provision method and apparatus in a distributed system

A highly reliable display control apparatus and method suitable for use in a computer control system which is required to have high degree of reliability, such as control systems for railroad traffic or a nuclear power station. A meaningful symbol is divided into a plurality of sections and these sections are independently input to either one of the inputs of an interactive man-machine system through different systems so that these sections of the meaningful symbol are displayed in the same frame of the man-machine system, thus enabling the operator to visually detect any abnormality as to whether the displayed meaningful symbol is complete or not, whereby a high degree of reliability of the display is obtained.

Method and apparatus of detecting and displaying abnormal conditions

A system is provided for the preparation of a cyclic maintenance work schedule table. The system includes a display unit which can show boxes defined by dates in a desired period and the names of individual workers. The system also has a worker data memory for storing scheduled work information of the individual workers during the period and work qualifications of the individual workers; a building data memory for storing the names, work details, last working dates, and contracted frequencies of maintenance work of buildings to be worked with during the period; a processor for deciding working dates in the period for the buildings stored in the building data memory; and another processor for allocating the names of the buildings in the descending order of the difficulty of work items on the basis of data - which have been obtained from the worker data memory, building data memory and working date deciding means - and, after one of the boxes has been filled with a predetermined working time, moving to another one of the boxes.

Cyclic maintenance work schedule table preparation system

A method of retrieving and editing distributed information, in which one of a plurality of equipment units connected to a common signal transmission line issues or originates a request to retrieve data information distributed among and stored in respective files of the other equipment units and to edit the distributed data information. The above-mentioned one equipment unit sends to the transmission line a retrieval request message containing retrieval information necessary to retrieve distributed data information. Each of the equipment units storing therein distributed data information receives the retrieval request message from the transmission line, and the files are retrieved on the basis of the retrieval information to retrieve the distributed data information. The data information retrieved in at least a first one of the equipment units storing therein the distributed data information is sent to the transmission line. This data information retrieved in the first equipment unit is received by at least two of the other equipment units through the transmission line for editing. These two other equipment units edit both the received data information from the first equipment unit and data information retrieved in these two equipment units, and then send the edited data information to the transmission line.

Method of retrieving and editing distributed information

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Hitachinaka, Japan

Nobuhisa Kobayashi