The Proceedings of Conference of Kanto Branch
Online ISSN : 2424-2691
ISSN-L : 2424-2691
2015.21
Session ID : 20406
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20406 Development of Absolute Displacement Sensor for measuring a Long Period and Large Amplitude by measurable although minimum
Akihiro HARAKazuto SETOYuichi IWASAKIMitsuru MIYAZAKIToru WATANABERyo WATANABESatoshi FUTAI
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
This paper proposes a new type of active seismometer measuring vibration possessing long period and wide dynamic range. In order to lower the natural frequency and expand the detectable amplitude, the sensor with the low natural frequency is realized by using feedback control. Moreover, to compensate phase-delay, third order phase-lag compensator is added to shape measured output. It has been demonstrated that the detectable frequency range of the sensor is extended from 0.1 [Hz] to 10[Hz], while the dynamic range of that is expanded up to 57[dB], namely vibrations that possess 700times larger amplitude than the maximum stroke of the sensor. New sensor body is produced and tested.
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© 2015 The Japan Society of Mechanical Engineers
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