Analysis and optimization of wide-band force-balance seismometer responses

Ples̆inger, A.; Buben, J.

doi:10.1007/bf01587111

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…FBAs are well adapted to record strong earthquakes, but it has been shown in Plesinger (1984) that, for a broadband record of the seismic activity, a sensor with a flat response to the ground velocity (i.e., a broadband seismometer) is better adapted (Sheffield, 1964;Melton and Johnson, 1962;Teupser and Plesinger, 1979;Usher et al, 1979;Wielandt and Streckeisen, 1982). This is achieved by introducing a derivative term in the controller, such as Hs g p g i =s sg d :…”

Section: Passive Accelerometermentioning

confidence: 98%

Review: Inertial Sensors for Low-Frequency Seismic Vibration Measurement

Collette¹,

Janssens²,

Fernandez-Carmona³

et al. 2012

Bulletin of the Seismological Society of America

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The objective of this paper is to review recent advances in the sensors used to measure seismic linear vibrations at low frequencies. The main types of inertial sensors are reviewed: absolute displacement sensors, geophones, accelerometers, and seismometers. The working principle of each of them is explained, along with the general strategies to extend their bandwidth. Finally, the principle fundamental limitations of all inertial sensors are reviewed: tilt-to-horizontal coupling, zerolength springs, and sources of noise.

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Section: Passive Accelerometermentioning

confidence: 98%

Review: Inertial Sensors for Low-Frequency Seismic Vibration Measurement

Collette¹,

Janssens²,

Fernandez-Carmona³

et al. 2012

Bulletin of the Seismological Society of America

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show abstract

“…Undoubtedly, the cornerstone of this evolution has been the introduction of the so-called force balance principle [2]- [5], which reduces the relative motion between the inertial mass and the support, and provides to feedback seismometers a much larger dynamic range than passive sensors. Actually, the introduction of this balancing force offers many advantages: (1) to increase the linearity of the sensor (because non-linear effects appear for large displacements), (2) to offer a flat sensitivity to acceleration or velocity at low frequency, which is better for measure seismic signals, and finally (3) to use a high resolution capacitive sensor to measure this relative motion.…”

Section: Introductionmentioning

confidence: 99%

Prototype of a Small Low Noise Absolute Displacement Sensor

2014

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Abstract-Inertial seismic sensors have typically a velocity readout, in order to offer a large dynamic range in a large frequency range. However, in some precision engineering applications, it can be preferable to access to the displacement. An example is the so-called sky-hook spring strategy used for active vibration isolation. In this paper, we present a prototype of small inertial sensor with a displacement readout. It is based on a commercial low cost geophone, which has been modified to measure the displacement with a capacitive sensor. It results in a compact sensor with a resolution which is a factor 10 better than the commercial geophone, but a limited range of amplitudes. The paper finished with an attempt to extend the bandwidth of the sensor at low frequency.Index Terms-Absolute displacement sensor, geophone, capacitive sensor, inertial reference.

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Analysis and optimization of wide-band force-balance seismometer responses

Cited by 2 publications

References 6 publications

Review: Inertial Sensors for Low-Frequency Seismic Vibration Measurement

Review: Inertial Sensors for Low-Frequency Seismic Vibration Measurement

Prototype of a Small Low Noise Absolute Displacement Sensor

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