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- W2184580079 abstract "Summary This paper presents an overview of the design & operating principles of Micro-Electro-Mechanical Systems (MEMS) Digital Geophones being introduced in seismic data acquisition. Seismic reflection is a powerful technique for under ground exploration which depends upon on the existence of distinct and abrupt seismic velocity and /or mass density changes in the sub surface. The change in density or velocity is known as acoustic contrast. Ground motion can be measured as displacement, velocity, or acceleration. Conventional geophone is velocity sensitive which has limitation about frequency response, noise etc. MEMS based accelerometer with onboard Sigma Delta Modulator can be used as digital geophones for seismic data acquisition. The advantages over conventional geophones are that digital geophones provide a direct digital output signal in the form of a pulse density modulated bit stream, broad bandwidth, less sensitive to planting tilt, 3 component seismic data acquisition from a single point geophone, etc. Capacitive accelerometers which measure acceleration below their fundamental resonance can be thought as digital geophones with very high sensitivity, no DC output, no drift bias stability and lowest noise floor. Micromachined geophones can offer size and weight advantage over conventional geophones." @default.
- W2184580079 created "2016-06-24" @default.
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- W2184580079 date "2006-01-01" @default.
- W2184580079 modified "2023-09-27" @default.
- W2184580079 title "MEMS Based Digital Geophones with Onboard Sigma Delta Modulator" @default.
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