Omron Tateisi Electronics Co.

Omron Corporation

Ryoichi Miyake

Hisato Fujisaka

Hiroyuki Yamada

Takeshi Yamada

Yoshimi Kanda

Shinichiro Fukuoka

Hideaki Nakamura

Iichi Hirao

Takaharu Takinami

Tatsuhiko Naito

Tunetaka Shimada

Kazunori Morikawa

Kiyokazu Yoshimura

Koichi Tshujino

Norio Miyawaki

Tatemitsu Hirayama

Kazuaki Otsuka

Tetsuro Iwakiri

A first device (1) and a second device (2) can be communicated by an electromagnetic coupling. Data to be transmitted from the first device to the second device is converted into pulse signals of different duty ratios in accordance with the H or L level of the transmission data. Further, the oscillation of an oscillator (15) of the first device is intermittently performed in accordance with the H/L level of the pulse signal. Switching elements (39, 40) are provided for a resonance circuit (30) provided in the second device. When data is transmitted from the second device to the first device, the switching elements are turned on or off in accordance with the data. Thus, the electromagnetic coupling is intermittently performed. The oscillator of the first device at that time intermittently executes the oscillation at a third duty ratio.

Data communication apparatus

Data carrier

This invention is directed to a data carrier identification system which is used, for example, in production lines. Different data carrier identification numbers (DCNos.) are assigned to respective different data carriers in an access enable area where data carriers can communicate with a central controller. The different DCNos. allow the controller to correctly access a specific data carrier even if more than one data carrier exists in an access enable area. When a new data carrier enters the access enable area its data carrier identification number is checked by the controller to determine if another data carrier already in the area has the same data carrier identification number and, if so, the controller instructs one or more of the data carriers to change their data carrier identification number so that no two data carriers within the access area have the same data carrier identification number.

Data carrier identification system

A tool monitoring system for detecting a tool failure of a tool employed in a tool machine, comprising artificial signal generating unit for generating a predetermined artificial tool failure signal simulating the acoustic emission signal obtained in an actual failure of the tool, acoustic emission transducing unit adapted to be mounted on the tool machine near the tool and driven by the artificial signal generating unit for applying the artificial tool failure signal to the tool machine, acoustic emission sensing unit mounted on the tool machine near the tool so as to receive, in a setting mode of the system where the transducing unit is mounted on the machine, the applied artificial tool failure signal from the acoustic emission transducing unit through the tool machine and, in a monitoring mode of the system where the tool is operated, an acoustic emission from the tool, and signal processing unit for analyzing an output signal generated from the acoustic emission sensing unit to detect the tool failure of the tool.

Tool monitoring system

Growing community of inventors

Kyoto, Japan

Ryoichi Miyake