27-01-2012, 03:27 PM
DESIGN AND IMPLEMENTATION OF SEISMIC SENSOR
[attachment=16724]
INTRODUCTION
1.1 Overview
There are two basic types of seismic sensors: inertial seismometers which measure ground motion relative to an inertial reference (a suspended mass), and strainmeters or extensometers which measure the motion of one point of the ground relative to another. Since the motion of the ground relative to an inertial reference is in most cases much larger than the differential motion within a vault of reasonable dimensions, inertial seismometers are generally more sensitive to earthquake signals.
Literature Review
As indicated earlier on, the most commonly used description of a seismograph response in the classical observatory practice has been the “magnification curve”, i.e. the frequency-dependent magnification of the ground motion
Project Organization
This project work presented the design and implementation of seismic sensors for industrial and domestic purpose using the piezo element and a piezo buzzer with its underlining principle of piezoelectricity. The circuit uses readily available components and the design is straight forward. A standard piezo sensor is used to detect vibrations/sounds due to pressure changes.
[attachment=16724]
INTRODUCTION
1.1 Overview
There are two basic types of seismic sensors: inertial seismometers which measure ground motion relative to an inertial reference (a suspended mass), and strainmeters or extensometers which measure the motion of one point of the ground relative to another. Since the motion of the ground relative to an inertial reference is in most cases much larger than the differential motion within a vault of reasonable dimensions, inertial seismometers are generally more sensitive to earthquake signals.
Literature Review
As indicated earlier on, the most commonly used description of a seismograph response in the classical observatory practice has been the “magnification curve”, i.e. the frequency-dependent magnification of the ground motion
Project Organization
This project work presented the design and implementation of seismic sensors for industrial and domestic purpose using the piezo element and a piezo buzzer with its underlining principle of piezoelectricity. The circuit uses readily available components and the design is straight forward. A standard piezo sensor is used to detect vibrations/sounds due to pressure changes.