Hitachi, Ltd.

Hitachi Engineering Co., Ltd.

Akira Kaji

Setsuo Arita

Hiroshi Seki

Yukiharu Ohga

Yukio Nagaoka

Koichi Kawaguchi

Hiroyuki Yuchi

Hiroshi Matsumoto

Hiroshi Yokoyama

Seiitsu Nigawara

Tadayoshi Saito

Masahide Nomura

Makoto Shimoda

Kenji Baba

Yasunori Katayama

Junzo Kawakami

Akira Sugano

Hisanori Miyagaki

Hiroshi Hanaoka

Atsushi Takita

Takekazu Maruyama

Yukihiro Oda

Haruya Tobita

Yoshihiko Imura

Yataro Suzuki

Shinya Kikuchi

Masato Okano

A pointer remotely points a display screen of a large screen display device. The display screen is picked up by a monitor camera. An image processing unit extracts a feature of the pointer used for pointing based on the resulting image signal to identify the position of the pointing point and the pointer based on the feature. A computer generates information on an object to be displayed at a position pointed by the pointer. The generated information is displayed on a display device (CRT display device or large screen display device) assigned to the pointer. Even when a plurality of pointers are used, the information on the object to be displayed pointed by the pointer is properly displayed.

Information presentation apparatus and information display apparatus

A method and apparatus for displaying on a display screen the controlling circuit in a plant controlling system for controlling a plant by a controller using a microcomputer. The display screen is segmented into a software region and a hardware region. The software circuit which is realized by software is displayed in the software region, and the hardware circuit related to the software circuit is displayed in the hardware region. The information, which is plotted during the interactive process and is displayed in the software regions, is automatically translated into a program for controlling the controller. Operation data of the plant is also given on the display screen. Desired circuit elements of the software circuit may be selected to change parameters of the circuit elements. Maintenance work can be carried out while observing the indication on the display screen without any aid of documents such as the maintenance manual or the like.

Plant control system and method for displaying control circuit thereof

In a system which performs an inference based on fault tree knowledge, a guidance and a formula of definition can be displayed in a window on a CRT display screen by selecting the individual items from a fault tree on the display screen by using, for example, a soft key. For displaying an abnormal course in one display screen, only events relevant to the abnormal course is picked up, and the fault tree is then reedited, so that the reedited fault tree can be automatically displayed on the display screen.

Fault tree displaying method and process diagnosis support system

A state diagnostic system for equipment is disclosed. The system is constructed of a neural network model for learning in advance one or more samples of information on vibrations, which are produced in a specific operation state of the equipment, in association with the corresponding operation state and obtaining an output signal corresponding to results of the learning when information on vibrations produced upon operation of the equipment is inputted; an input unit for inputting to the neural network model the information on the vibrations produced upon operation of the equipment; and an output unit for outputting the output signal from the neural network model as diagnostic results to a user. State diagnostic methods, learning system, preview/predict system, diagnosis training system, service life estimation assisting system, service life estimation assisting system, and maintenance assisting system are also disclosed.

Neural network state diagnostic system for equipment

A process control system controls a large scale plant such as thermal power plant. This process control system includes a target setting unit for setting an operation target, a control unit for receiving a signal indicating the operation target and for outputting a controlled variable to operate the process, an evaluation unit for quantitatively evaluating operation characteristics corresponding to the operation target of the process operated on the basis of a signal indicating the controlled variable supplied from the control unit, a modification unit for extracting an optimum operation process qualitatively squaring or conforming with the evaluated value derived by the evaluation unit out of a modification rule predetermining operation unit in qualitative relation between the operation characteristics and the operation target of the process and for determining the modification rate of the control unit, a storage unit having a model of a neural network for storing a relation between the operation target and the modification rate derived by the modification unit as a connection state within a circuit, and a learning unit for making the model of the neural network learn the relation between the operation target and the modification rate.

Process control system and power plant process control system

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Hitachi, Japan

Akira Kaji