Yokogawa Electric Corporation

Tetsuya Ohtani

Akira Nagashima

Shinji Kobayashi

Hiroshi Sugawara

Akira Miura

Akira Toyama

Chie Sato

Katsuya Ikezawa

Hirotoshi Kodaka

Minoru Akutsu

Yusuke Kishine

Ryutaro Okano

A network control system for packet-transmitting a manipulated variable (MV), calculated from a deviation between a variable from a sensor measuring a physical quantity of a controlled object plant and a set value at a known sampling period, to an actuator provided on the plant side via a network, and causing the actuator to provide the MV to the plant. The system includes: an MV complementing unit that provides a complementary value of the MV to the actuator when an error occurs in a packet transmission; an MV buffering unit that answers back trend data of the MV provided to the plant from the actuator or the complementary value being complemented by the MV compensating unit for the actuator, to the controller via the network; and an MV compensating unit that corrects a calculation of the MV of the controller based on the trend data or the complementary value being answered.

Network control system

An inspection apparatus inspects an inspected object based on a waveform quality of a signal that the inspected object outputs. The inspection apparatus has a power supply section which outputs a control signal that controls an output of the inspected object, a waveform measuring section which measures the signal that the inspected object outputs to generate a waveform image, an analyzing section which derives a value indicating a waveform quality from the waveform image that the waveform measuring section measures, a deciding section which decides whether or not the value derived by the analyzing section satisfies a target value, and an optimizing section which changes a set value of the control signal that the power supply section outputs, based on a decision result of the deciding section.

Inspection apparatus

Growing community of inventors

Tokyo, Japan

Tetsuya Ohtani