摘要:
A sensor includes two shear-mode piezoelectric transducers, wherein each piezoelectric transducer has a bottom surface and a top surface, wherein the top surfaces of the piezoelectric transducers are rigidly connected to each other, and wherein the bottom surfaces of the piezoelectric transducers are configured to be attached to an object to be measured.
摘要:
Methods and apparatuses are disclosed that assist in sensing underwater signals in connection with geophysical surveys. One embodiment relates to a transducer including a cantilever coupled to a base. The cantilever may include a beam and a first coupling surface angularly oriented from the beam, and the base may include a second coupling surface angularly oriented from the beam and substantially parallel to the first coupling surface of the cantilever. The transducer may further include a sensing material coupled between the first coupling surface of the cantilever and the second coupling surface of the base.
摘要:
Der piezoelektrische Beschleunigungsmesser enthält einen zylindrischen piezoelektrischen Messfühler (1), der eine Schubverformung durch ein Trägheitselement (2) erfährt, bei dem in Richtung der Höchstempfindlichkeitsachse (A) eine Durchgangsbohrung (17) für einen ersten Stromanschluss (15) ausgeführt ist, der von einer Stirnfläche des piezoelektrischen Messfühlers (1) zu dessen anderer Stirnfläche durchgeführt ist, in deren Nähe der erste Stromanschluss (15) mit der inneren Seitenfläche des zylindrischen piezoelektrischen Messfühlers (1) elektrisch verbunden ist, während der zweite Stromanschluss (16) mit der äusseren Seitenfläche des zylindrischen piezoelektrischen Messfühlers (1) seitens der ersten Stirnfläche des letztgenannten elektrisch verbunden ist, in deren Nähe die Anschlusstelle der Stromanschlüsse (15, 16) liegt, die mit einem die letzteren umschliessenden Versteifungsglied (7) versehen ist.
摘要:
Methods and apparatuses are disclosed that assist in sensing underwater signals in connection with geophysical surveys. One embodiment relates to a transducer including a cantilever coupled to a base. The cantilever may include a beam and a first coupling surface angularly oriented from the beam, and the base may include a second coupling surface angularly oriented from the beam and substantially parallel to the first coupling surface of the cantilever. The transducer may further include a sensing material coupled between the first coupling surface of the cantilever and the second coupling surface of the base.
摘要:
An acceleration sensor includes a weight and a vibrator that supports the weight at its center of gravity. When acceleration is applied to the weight, stress equivalent to the applied acceleration is generated in the vibrator. As the vibrator is arranged to support the weight at its center of gravity, a characteristic relationship is observed between the acceleration, such as angular acceleration or translational acceleration, and the size of electric charges and the polarity. By taking advantage of this relationship, different types of acceleration can be easily detected.
摘要:
In an acceleration sensor (10) including a vibrator (1) subject to a sliding vibration and a weight section (2) connected to the vibrator (1) and supported at a position different from the position of the center of gravity of an assembly of the vibrator (1) and weight section (2), for detecting an angular moment about the support point, which is produced at the weight section (2) by application of acceleration, as sliding vibration with the vibrator (1), the acceleration sensor (10) includes a rectangular substrate (3) having a plurality of electrodes (6) electrically connected to the vibrator (1), a formation pattern of the plurality of electrodes (6) is symmetrical about an axis parallel to at least one side of the substrate (3), and the plurality of electrodes (6) have substantially equal thickness. Since the formation pattern of the electrodes (6) on the substrate (3) is symmetrical and the respective electrodes (6) have substantially equal thickness, the vibrator (1) that is bonded to this substrate (3) does not incline and the detection sensitivity does not vary.
摘要:
In an acceleration sensor (10) including a vibrator (1) subject to a sliding vibration and a weight section (2) connected to the vibrator (1) and supported at a position different from the position of the center of gravity of an assembly of the vibrator (1) and weight section (2), for detecting an angular moment about the support point, which is produced at the weight section (2) by application of acceleration, as sliding vibration with the vibrator (1), the acceleration sensor (10) includes a rectangular substrate (3) having a plurality of electrodes (6) electrically connected to the vibrator (1), a formation pattern of the plurality of electrodes (6) is symmetrical about an axis parallel to at least one side of the substrate (3), and the plurality of electrodes (6) have substantially equal thickness. Since the formation pattern of the electrodes (6) on the substrate (3) is symmetrical and the respective electrodes (6) have substantially equal thickness, the vibrator (1) that is bonded to this substrate (3) does not incline and the detection sensitivity does not vary.
摘要:
A small-sized, high detection sensitivity and high performance acceleration sensor (1) having directional or non-directional sensitivity is disclosed. The acceleration sensor (1) is provided with a vibrator (2) having uni-directional polarization and a weight (3) connected to the vibrator (2). The weight (3) is supported at the position different from the center of gravity of the total body of the vibrator (2) and the weight (3) itself. The vibrator (2) is disposed so that its direction of polarization axis is either consistent of inconsistent with an axis of the torsion of the vibrator.
摘要:
La masse sismique (4) d'un accéléromètre comportant au moins un transducteur électro-mécanique est stabilisée dans la direction perpendiculaire à l'axe sensible par un stabilisateur latéral (8) disposé entre la masse sismique ou le transducteur électro-mécanique et un élément de structure (7). Par cette stabilisation, les perturbations du résultat de mesure par des accélérations latérales sont évitées ou au moins réduites.