Plasma detector and laser beam machine with plasma detector

Details Plasma detector and laser beam machine with plasma detector Plasma detector and laser beam machine with plasma detector

2005-01-31

2008-08-12

Elve, M. Alexandra (Department: 1793)

Electric heating

Metal heating

By arc

C219S121600

Reexamination Certificate

active

07411152

ABSTRACT:
Voltage fluctuating time integrating means integrates voltage fluctuating time when voltage of a sensor electrode fluctuates as a voltage fluctuation integrated time, and voltage fluctuation occurrence rate computing means computes a rate of occurrence of voltage fluctuation for time on the basis of the voltage fluctuation integrated time integrated. By doing so, quantity of generated plasma can be taken as the rate of occurrence of voltage fluctuation, and plasma detection judging means can easily detect large volume of generated plasma on the basis of the computed voltage fluctuation occurrence rate. Then, it is not necessary to provide a circuit for measuring electric resistance between the sensor electrode and a workpiece as a conventional way, thereby avoiding complexly structured plasma detector.

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EP Int'l. Search Report, May 24, 2005.

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