202 簡易診断用押し当て式軌跡振動計の開発(計測1)(OS.02 : 計測・信号処理・異常診断)

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Various types of machine faults such as unbalance, misalignment, looseness, and eccentricity are found in the category of fault of structure. The unbalance includes static unbalance, couple unbalance, quasi-static unbalance and dynamic unbalance. The misalignment includes parallel misalignment, angular misalignment and compound misalignment. As the vibration forms vary according to the types of machine faults, it is extremely difficult for conventional unidirectional types of vibrometers to diagnose the structural faults. We can observe the movement of the structure by using orthogonal three directional vibration measurements, and it will be a great help to diagnose the structural faults. But large and complex operations are necessary to realize it. We have developed a palm size vibrometer which can measure vibrations in three orthogonal directions simultaneously and visualize the movement of the measuring point on LCD screen only by pressing the sensor onto a surface of machine. We call it the orbit visualizing vibrometer. We need not fix a sensor tightly by bolt or adhesive. The structure of the sensor is very unique. Three piezoelectric accelerometers are arranged at equal intervals around the sensor center axis with the sensitive axes of piezoelectric accelerometers facing the sensor tip. The principle of operation is quite different from conventional triaxial vibration pickups. A detailed operation principle of the new hand-held type triaxial vibration pickup is reported, and applications of the orbit visualizing vibrometer are described.
社団法人日本機械学会の論文
2001-08-03

202 簡易診断用押し当て式軌跡振動計の開発(計測1)(OS.02 : 計測・信号処理・異常診断)

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