Hitachi, Ltd.

Fumio Murata

Setsuo Arita

Tetsuo Ito

Yukiharu Ohga

Mitsuru Kudo

Hideyuki Sato

Yuichi Higashikawa

Yuuzi Yamasawa

Shigeru Izumi

Satoshi Suzuki

Atomi Noguchi

Yasuo Nishizawa

Hiroshi Ujita

Masao Miyake

Fumiyasu Ookido

Shunsuke Utena

In an apparatus for operating and monitoring a plant, a manipulating device provides the plant with manipulation signals for operating the plant. In response to information supplied from the plant and a manipulating signal of the manipulating device, a first display data producing device produces first display data needed for the operation of the plant changing every moment. On the basis of data supplied from the first display data producing device, a first display device displays information relating to the operation of the plant. In response to information supplied from the plant and a manipulating signal of the manipulating device, a second display data producing device produces data needed for monitoring the plant. On the basis of data supplied from the second display data producing device, a second display device displays information relating to the monitoring of the plant on a larger display screen than that of the first display device. Information displayed by the first display device and information displayed by the second display device complement each other and make it possible to accurately operate and monitor the plant.

Plant operating and monitoring apparatus

Disclosed is an information processing system having a neural processing unit, an expert system for executing an inference using a rule, and an information selection unit. The neural processing unit and the expert system being arranged in parallel to each other. The information selection unit selects and outputs necessary information from the information outputted from the neural processing unit and the expert system. Since necessary information is selected and outputted from the information obtained from the neural processing unit and the expert system as a result of processing executed by the neural processing unit and the expert system in the parallelly different points of view, the certainty of the information to be selected is improved.

Information processing apparatus having a neural network and an expert

A safety control safeguard system includes sensors disposed in a quadruple array. First, second, third and fourth signal processing channels provided in parallel each include signal processing means for receiving output signals from the associated sensors for producing a trip signal. First and second actuating means operable independent of each other are provided for actuating an apparatus to be controlled. A first switch means operatively connected to the first, second, third and fourth processing channels for activating the first actuating means in response to reception of the trip signal produced by the signal processing channels and second switch means operatively connected to the first, second, third and fourth processing channels for activating the second actuating means in response to reception of the trip signal produced by the signal processing channels. The first and second switching means are operable independent of each other and constitute a 2-out-of-4 logic circuit in cooperation with the first and second actuating means.

Control system

Growing community of inventors

Katsuta, Japan

Fumio Murata