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Understanding MEMS-based digital seismic sensors
First Break, 2017Over the last few decades almost all the electronic devices we use in our daily lives have switched from analog to digital owing to the numerous benefits they offer, such as miniaturization, enhanced functionalities or reduced power consumption, etc.
Nicolas Tellier, Jérôme Lainé
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Spatial aliasing and 3C seismic sensors
GEOPHYSICS, 2021Temporal aliasing occurs when a waveform is sampled with less than two points per time period for a signal at a given frequency. This insufficiently sampled frequency will be incorrectly mapped into a lower (aliased) frequency. Analogous to this, spatial aliasing is said to occur when a propagating waveform is measured at spatial intervals larger than
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Piezoelectric seismic sensor for intrusion detection
The Journal of the Acoustical Society of America, 1983A seismic sensor for intrusion detection includes a base, a cantilever member of piezoelectric construction extending from the base, and a mass loading the end of the cantilever member remote from the base. The base defines a slot for receiving the end of the cantilever member, and holes, perpendicular to the slot, for receiving electrical conductors ...
Eric A. Kolm, Henry H. Kolm
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Human footstep detection using seismic sensors
2015 7th International Conference on Electronics, Computers and Artificial Intelligence (ECAI), 2015This paper is focused on the hardware and software implementation of DSP algorithms for footstep detection using seismic signal. The main contribution of this research consists in a hardware design and in a software application that process the signals received from the seismic sensor of type SM-24 using PC sound card.
Petre Anghelescu +2 more
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Coupling and recovering seismic detection sensors
The Journal of the Acoustical Society of America, 1994A seismic system is placed in a predetermined orientation with respect to a surface of a formation, and a low viscosity substance is introduced between the sensor system and the surface of the formation. The substance has a composition formulated for stiffening in situ by increasing viscosity to provide a mechanical bond and an acoustical signal ...
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The Leading Edge, 1999
A simple design has served geophysicists well for many decades. It is, of course, the geophone—essentially a coil suspended in a magnetic field. This simple arrangement can detect vibrations of the earth’s surface when explosive or vibratory sources send energy into the ground.
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A simple design has served geophysicists well for many decades. It is, of course, the geophone—essentially a coil suspended in a magnetic field. This simple arrangement can detect vibrations of the earth’s surface when explosive or vibratory sources send energy into the ground.
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Innovations in research and clinical care using patient‐generated health data
Ca-A Cancer Journal for Clinicians, 2020H S L Jim +2 more
exaly