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1. WO2011004413 - LOW FREQUENCY FOLDED PENDULUM WITH HIGH MECHANICAL QUALITY FACTOR, AND SEISMIC SENSOR UTILIZING SUCH A FOLDED PENDULUM

Publication Number WO/2011/004413
Publication Date 13.01.2011
International Application No. PCT/IT2010/000293
International Filing Date 01.07.2010
IPC
G01H 1/00 2006.01
GPHYSICS
01MEASURING; TESTING
HMEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
1Measuring vibrations in solids by using direct conduction to the detector
G01V 1/18 2006.01
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
1Seismology; Seismic or acoustic prospecting or detecting
16Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
18Receiving elements, e.g. seismometer, geophone
G01P 15/02 2006.01
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
15Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
02by making use of inertia forces
CPC
G01H 1/00
GPHYSICS
01MEASURING; TESTING
HMEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
1Measuring ; characteristics of; vibrations in solids by using direct conduction to the detector
G01P 15/08
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
15Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
02by making use of inertia forces ; using solid seismic masses
08with conversion into electric or magnetic values
G01P 2015/0828
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
15Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
02by making use of inertia forces ; using solid seismic masses
08with conversion into electric or magnetic values
0805being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration
0822for defining out-of-plane movement of the mass
0825for one single degree of freedom of movement of the mass
0828the mass being of the paddle type being suspended at one of its longitudinal ends
G01V 1/186
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
1Seismology; Seismic or acoustic prospecting or detecting
16Receiving elements for seismic signals
18Receiving elements, e.g. seismometer, geophone ; or torque detectors, for localised single point measurements
186Hydrophones
Applicants
  • UNIVERSITÀ DEGLI STUDI DI SALERNO [IT]/[IT] (AllExceptUS)
  • GIORDANO, Gerardo [IT]/[IT] (UsOnly)
  • BARONE, Fabrizio [IT]/[IT] (UsOnly)
Inventors
  • GIORDANO, Gerardo
  • BARONE, Fabrizio
Agents
  • PERRONACE, Andrea
Priority Data
RM2009A00034807.07.2009IT
Publication Language English (EN)
Filing Language Italian (IT)
Designated States
Title
(EN) LOW FREQUENCY FOLDED PENDULUM WITH HIGH MECHANICAL QUALITY FACTOR, AND SEISMIC SENSOR UTILIZING SUCH A FOLDED PENDULUM
(FR) PENDULE REPLIÉ BASSE FRÉQUENCE POURVU D'UN FACTEUR DE HAUTE QUALITÉ MÉCANIQUE ET CAPTEUR SISMIQUE UTILISANT CE PENDULE REPLIÉ
Abstract
(EN)
The invention concerns a folded pendulum, comprising: - a support (F); - a test mass (PM); - a simple pendulum (SP); - an inverted pendulum (IP); the simple pendulum and the inverted pendulum being connected at one of their ends to the test mass (PM) and at the other end to the support (F) by means of 4 corresponding joint systems (G), the test mass being not connected to the support (F) and being therefore free to oscillate, each joint system (G) relevant to the simple pendulum (PS) comprising one or more joints in tension, the folded pendulum being characterised in that: each of the joint systems (G) relevant to the inverted pendulum (IP) comprises one or more joints in compression. The invention further concern a seismic sensor utilizing the folded pendulum according to the invention.
(FR)
La présente invention concerne un pendule replié comprenant : - un support (F) ; - une masse d'essai (PM) ; - un pendule simple (SP) ; - un pendule inversé (IP) ; le pendule simple et le pendule inversé étant raccordés au niveau de l'une de leurs extrémités à la masse d'essai (PM) et au niveau de l'autre extrémité au support (F) au moyen de quatre systèmes d'articulation correspondants (G), la masse d'essai n'étant pas raccordée au support (F) et étant, par conséquent, libre d'osciller, chaque système d'articulation (G) applicable au pendule simple (PS) comprenant une ou plusieurs articulations en tension, le pendule replié étant caractérisé en ce que : chacun des systèmes d'articulation (G) applicable au pendule inversé (IP) comprend une ou plusieurs articulations en compression. La présente invention concerne également un capteur sismique utilisant le pendule replié selon l'invention.
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