Yokogawa Electric Corporation

Bridgestone Corporation

Yoshikatsu Sakai

Yoshiyuki Kamata

Kenji Yamaguchi

Masayuki Nakagawa

Masao Yokomori

Katsuhisa Tsuda

Masami Kikuchi

Takashi Yokoi

Takahisa Shizuku

Taisuke Kuroda

Wataru Seki

Katsuhiro Kobayashi

Takafumi Kawano

Kouji Suzuki

Asao Miyabe

Yasuo Nakai

Provided is a method for predicting the remaining life of a hose and a method for diagnosing the deterioration level of a hose that can be easily performed without breaking the hose. The disclosure includes: a testing step of performing a hose bending test; and a predicting step of predicting the remaining life of a hose subject to prediction, wherein during the hose bending test, either a value of an external force required to displace a hose portion in a direction of the external force by a predetermined displacement amount, or a value of a displacement amount in a direction of the external force of the hose portion when the external force of a predetermined magnitude is exerted on the hose portion is measured, and the measured value is obtained as the test result.

Method for predicting remaining life of hose and method for diagnosing deterioration level of hose

A seismic isolation apparatus features damping characteristics equivalent to or better than prior art, without burdening the environment. In this seismic isolation apparatus, a cylindrical cavity portion is formed at the middle of an outer side laminated body, which has a form in which respective pluralities of resiliently deformable rubber rings and metal rings for maintaining rigidity are alternately laminated. A helically formed coil spring is disposed in this cavity portion so as to be snugly fitted. An inner side laminated body, which has a form in which respective pluralities of resiliently deformable rubber plates and metal plates for maintaining rigidity are alternately laminated, is disposed at an inner peripheral side of the coil spring.

Seismic isolation apparatus

The controller executes a control calculation based on proportional and integration calculation parameters which are preset, and outputs a control output to a process, and comprises a display device for displaying panels having characters and figures thereon; a panel expanding key for instructing the display device to expand, or change, the panel to be displayed; a plurality of keys for setting control operations and various parameters; an operating panel generating unit for displaying as a bar graph; a process value and a control output value on an operating panel to be displayed on the display device; a trend graph panel generating unit for displaying the transition of the process value on a trend graph panel to be displayed on the display device; a tuning panel generating unit for displaying information to control the control parameter used in the control calculation on a tuning panel to be displayed on the display device; a display controlling unit for controlling the displays of the panels; and an operation key function changing unit for changing the functions of the plurality of keys.

Controller including multi-function

The controller executes a control calculation based on proportional and integration calculation parameters which are preset, and outputs a control output to a process, and comprises a display device for displaying panels having characters and figures thereon; a panel expanding key for instructing the display device to expand, or change, the panel to be displayed; a plurality of keys for setting control operations and various parameters; an operating panel generating unit for displaying as a bar graph a process value and a control output value on an operating panel to be displayed on the display device; a trend graph panel generating unit for displaying the transition of the process value on a trend graph panel to be displayed on the display device; a tuning panel generating unit for displaying information to control the control parameter used in the control calculation on a tuning panel to be displayed on the display device; a display controlling unit for controlling the displays of the panels; and an operation key function changing unit for changing the functions of the plurality of keys.

Controller including multifunctions

A controller in which proportional integral (PI) arithmetic is effected on a deviation between a measurement or process signal from a process or controlled system and a control set value, and a resultant manipulation signal is outputted to the process. A waveform of the process signal or the deviation signal is observed. PI arithmetic parameters undergo self-tuning so that the measurement result becomes a preset response target. In the preferred embodiment, means are provided for performing self-tuning on the PI arithmetic parameters including waveform observing means for using an area ratio of a first area to a second area as one of the evaluation indexes which represent patterns of the measured waveforms, the ratio being associated with the process signal or the deviation signal extending from a first generation timing of a first peak of the process signal or the deviation signal, to a subsequent second generation timing of a second peak, the second area being associated with the process signal or the deviation signal extending from the second generation timing to a timing given by second timing+(second timing - first timing).

Self-tuning controller

Growing community of inventors

Tokyo, Japan

Yoshikatsu Sakai