class A triaxial force-balance accelerometers

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Journal Article
Published: 05 May 2022
Seismological Research Letters (2022) 93 (4): 2138–2146.
...Nikos Germenis; Georgios Dimitrakakis; Efthimios Sokos; Pantelis Nikolakopoulos Abstract A new class‐A forcebalance accelerometer (FBA) is designed, simulated, and evaluated. The focus of this work was to design a low‐cost but high‐performance instrument. The FBA has output voltage proportional...
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Journal Article
Published: 01 July 2014
Seismological Research Letters (2014) 85 (4): 771–774.
... structure for comparison. REF TEK force balance triaxial borehole accelerometers form the downhole array to capture the propagation and travel time from the lowest downhole depth to the ground surface. Large and abrupt changes may indicate damage to structural components, allowing engineers to rapidly...
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Journal Article
Published: 23 October 2019
Seismological Research Letters (2020) 91 (2A): 585–592.
... communication, real‐time auxiliary and state‐of‐health (SOH) channels, event processing and triggers, remote firmware upgrades, and features for earthquake early warning, such as low data latency. Mandatory criteria for the triaxial, broadband, forcebalance accelerometers were full‐scale range of ± 4...
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Journal Article
Published: 01 August 2021
Earthquake Spectra (2021) 37 (3): 2066–2083.
... and employed in this study as the reference sensor, the EpiSensor is a triaxial force-balance servo accelerometer optimized for earthquake recording applications. A widely used accelerometer, the EpiSensor consists of three orthogonally co-mounted force-balance sensors per axis. The EpiSensor, FBA ES-T, has...
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Journal Article
Published: 01 August 2004
Earthquake Spectra (2004) 20 (3): 579–596.
... and crosses the Denali fault perpendicularly about 87 km east of the epicenter (Figure 1). The Alyeska pump-station records and the instrumental characteristics were provided to the USGS by Alyeska under a cooperative agreement. The pump stations are equipped with Honeywell Sundstrand force-balance...
Journal Article
Published: 10 March 2021
Seismological Research Letters (2021) 92 (3): 1704–1716.
...) . Since 2011, the network has been further developed, and it now consists of 43 broadband and short‐ and mean‐period stations, 83 strong‐motion stations (29 force balance accelerometers collocated with seismometers and 54 micro electro‐mechanical systems [MEMS]–based accelerometers installed at selected...
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Journal Article
Published: 14 February 2017
Bulletin of the Seismological Society of America (2017) 107 (2): 718–740.
... distributed on 10 levels (Fig.  4 ): basement, 1st (ground), 2nd, 7th, 8th, 13th, 14th, 19th, 20th, and roof. Among the sensors, 29 of them are 2 g ‐uniaxial (Kinemetrics ES‐U) and one triaxial Force Balance Accelerometers (Kinemetrics ES‐T) with 1.25    V / g sensitivity. The ES‐T (channels 1...
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Journal Article
Published: 01 July 2013
Seismological Research Letters (2013) 84 (4): 629–644.
..., and located in the Po plain, were assigned to class C and denoted with a dagger. The strong‐motion stations are equipped with Kinemetrics Episensor or Syscom MS2007+, which are triaxial force balance sensors, with a natural frequency above 50 Hz set to or full‐scale. They are coupled...
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Journal Article
Published: 01 November 2001
Earthquake Spectra (2001) 17 (4): 569–595.
... transformer models supporting a bushing, are presented. Experimental results are consistent with the analytical results and further support the effectiveness of FPS bearings in reducing inertia forces, thus, providing a suitable procedure to mitigate the seismic hazard of substation transformers. © 2001...
Journal Article
Published: 02 May 2017
Bulletin of the Seismological Society of America (2017) 107 (3): 1254–1264.
... Program (TSMIP), which has recorded the strong ground motions at free field since 1992. The details regarding the network can be found in Liu et al. (1999) . Each station is equipped with triaxial forcebalanced accelerometers, with a flat frequency response from direct current to about 50.0 Hz...
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Journal Article
Published: 01 December 1990
Bulletin of the Seismological Society of America (1990) 80 (6A): 1725–1752.
... accelerometer of Block and Moore (1970) was constructed to illustrate this principle. Feedback is used in many other situations where, although it results in improved linearity and broader band response, it does not lower noise levels. The use of electromagnetic feedback, which allows large feedback forces...
Journal Article
Published: 01 June 2004
Bulletin of the Seismological Society of America (2004) 94 (3): 818–827.
... Kinemetrics K2 digital recorders near the mainshock epicenter between 12 and 28 February 2001. Each K2 included an internal triaxial force-balance accelerometer set to full scale of 2 g and a built-in GPS timing system. An external velocity sensor (Mark Products triaxial L-28) was also attached to each K2...
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Journal Article
Published: 01 April 1995
Bulletin of the Seismological Society of America (1995) 85 (2): 496–515.
...-channel re- The SMART1 seismic array was installed in the corders. The pre-event memory is set to 10 sec. Ground northeast corner of Taiwan (Fig. 2). It is a dense array motions are digitized at 200 samples per second, so that of 39 force-balanced triaxial accelerometers configured the Nyquist frequency...
Journal Article
Published: 11 September 2018
Bulletin of the Seismological Society of America (2018) 108 (6): 3469–3487.
... triaxial force balance accelerometers and GSR‐18 strong‐motion recorders with GSD 18‐bit digitizer. Average interstation distance is 20–30 km in the hilly regions and 40–50 km in the plains ( Kumar et al. , 2012 ). The accelerograms recorded by this network are accessible from the PESMOS website (see...
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Journal Article
Published: 01 April 2022
Seismological Research Letters (2022) 93 (2B): 1115–1372.
...-precision geophysical measurements. These inherently digital sensors operate in the time domain with orders of magnitude improved performance compared to traditional analog transducers. Quartz crystal absolute pressure gauges, triaxial accelerometers and rotation sensors measure short-term events like...
Journal Article
Published: 01 January 2013
Seismological Research Letters (2013) 84 (1): 139–161.
... and certified the treasurer’s report. The fiscal year is 1 September to 31 August. The checking account balance is relatively high to pay for digitizing older issues of SRL and Earthquake Notes . Dues increased this last year and will increase...
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Journal Article
Published: 01 April 2020
Seismological Research Letters (2020) 91 (2B): 1095–1338.
...), useful resolution (NU), collocated recording comparison and shake map generation. The results proved that GL-P2B can be classified as a type of Class-B sensor. The records obtained are consistent with the data obtained by the collocated traditional force-balanced accelerometers even for stations...
Journal Article
Published: 01 April 2021
Seismological Research Letters (2021) 92 (2B): 1213–1479.
.... In this contribution, we report on the progress towards EEW readiness throughout the project to date. Optimizing EEW systems have led to demon- strate the possible speed and quality of earthquake parameter estimations. 70 EEW-ready class A force balance accelerographs are being installed across the region to reduce...
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 January 2008
GeoArabia (2008) 13 (1)
... with today’s and future challenges. Engaging this new blood in any organization, with the right balance of freedom and guidance, maximizes the utilization of such force and keep the motivation at high levels. Bérengère Savary-Sismondini (Schlumberger, Norway < bsavary@stavanger.oilfield.slb.com...
Series: Geophysical References Series
Published: 01 January 2002
DOI: 10.1190/1.9781560801979.ch1
EISBN: 9781560802969
... formats. associative memory : Content-addressable memory capable of performing search and compare operations on all memory locations in one memory access. Looks for similar bit patterns in key words. astatic : (ā stat' ik) Having a negative restoring force that aids a deflecting force, thereby...
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