Inertial Seismograph Design-Limitations in Principle and Practice (Or How Not to Build a Sensitive Seismograph)

Melton, Ben S.; Johnson, Daniel P.

doi:10.1109/jrproc.1962.287960

Cited by 9 publications

(4 citation statements)

References 3 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: 99%

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: 99%

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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“…These instruments were quite rug ged, and some of them eventually replaced the vertical com ponent Benioff seismometers. Some details of this in strument were shown and discussed by Melton and Johnson [1962].…”

Section: Reconsiderations Of Practical Seismographs and Combinationsmentioning

confidence: 98%

Earthquake seismograph development: A modern history—Part 1

Melton¹

1981

EoS Transactions

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The years from 1948 through 1976 saw numerous changes in electrodynamic‐type earthquake seismographs. During this period, these seismographs and their associated amplifiers, recorders, timing systems, and power supplies were adapted for worldwide service under many operating conditions. These developments required and led to a better understanding of the fundamental limitations on design, ultimately allowing small but adequately sensitive instruments to be built for installation in cased holes, thereby avoiding undesired local surface disturbances. The recording system developed within this period permits ready review and compact storage of seismological data.

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“…Here it is possible to suspend the test mass by a spring, sense changes in the extension of the spring. and use these to move the suspension point of the spring in a vertical direction in such a way as to maintain the spring at constant length (see Melton 1962). A vertical anti-seismic system of this type is presently being developed at JILA by Faller and Rinker (1979).…”

Section: N a Robertson R W P Dretler: I Kerr And J Houghmentioning

confidence: 99%

Passive and active seismic isolation for gravitational radiation detectors and other instruments

Robertson¹,

Drever²,

Kerr³

et al. 1982

J. Phys. E: Sci. Instrum.

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Abstract. Some new passive and active methods for reducing the effects of seismic disturbances on suspended masses are described, with special reference to gravitational radiation detectors in which differential horizontal motions of two or more suspended test masses are monitored. In these methods it is important to be able to determine horizontal seismic accelerations independent of tilts of the ground. Measurement of changes in inclination of the suspension wire of a test mass, relative to a direction defined by a reference arm of long period of oscillation, makes it possible to carry this out over the frequency range of interest for earth-based gravitational radiation detectors. The signal obtained can then be used to compensate for the effects of seismic disturbances on the test mass if necessary. Alternatively the signal corresponding to horizontal acceleration can be used to move the point from which the test mass is suspended in such a way as to reduce the effect of the seismic disturbance and also damp pendulum motions of the suspended test mass. Experimental work with an active anti-seismic system of this type is described.

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Inertial Seismograph Design-Limitations in Principle and Practice (Or How Not to Build a Sensitive Seismograph)

Cited by 9 publications

References 3 publications

Review: Inertial Sensors for Low-Frequency Seismic Vibration Measurement

Review: Inertial Sensors for Low-Frequency Seismic Vibration Measurement

Earthquake seismograph development: A modern history—Part 1

Passive and active seismic isolation for gravitational radiation detectors and other instruments

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