TESTER

TESTER

PROBLEM TO BE SOLVED: To appropriately prevent hunting by detecting the hunting by filter treatment of a detected signal of displacement or testing force. SOLUTION: During displacement feedback control, a displacement signal is guided to a filter 131. The displacement signal of a test frequency or h...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: YASUDA ZENICHI
Format: Patent
Sprache:eng
Schlagworte:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To appropriately prevent hunting by detecting the hunting by filter treatment of a detected signal of displacement or testing force. SOLUTION: During displacement feedback control, a displacement signal is guided to a filter 131. The displacement signal of a test frequency or higher passes the filter 131. The amplitude of the displacement signal having passed the filter 131 is compared with a reference value by a comparator 151. When the amplitude is a reference value or higher, the occurrence of hunting is detected, a switch 171 is opened, and a servo valve 3 is stopped. COPYRIGHT: (C)2008,JPO&INPIT