MEASURING APPARATUS

PURPOSE:To continuously monitor the parts of a helicopter. CONSTITUTION:Vibration sensors 10-1 to 10-8 respectively detect the vibrations of the parts of a helicopter. The outputs are respectively amplified by amplifiers 12-1 to 12-8, and low frequency components are extracted by filters 14-1 to 14-...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAMOTO KUNIYOSHI, SATO HIROYUKI, SEKIZAKI SEIICHI
Format:	Patent
Sprache:	eng
Schlagworte:	AEROPLANES AIRCRAFT ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT AVIATION COSMONAUTICS EQUIPMENT FOR FITTING IN OR TO AIRCRAFT FLYING SUITS HELICOPTERS MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PARACHUTES PERFORMING OPERATIONS PHYSICS TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To continuously monitor the parts of a helicopter. CONSTITUTION:Vibration sensors 10-1 to 10-8 respectively detect the vibrations of the parts of a helicopter. The outputs are respectively amplified by amplifiers 12-1 to 12-8, and low frequency components are extracted by filters 14-1 to 14-8. Regarding an engine, 0Hz-1kHz are extracted. Regarding its rotor, 2.5-50Hz are extracted. Regarding a cooling fan, 2.5-500Hz are extracted. The measured data are stored in a primary memory 32 at interval of 0.1sec. When the memory 32 is fully stored, the oldest data is erased, and new measured data is stored. A secondary memory 34 stores data Fourier-transformed from the measured data at each five hours. The memories 32, 34 are formed out of nonvolatile memories and removable.