摘要:
A capacitive device comprising at least one first and one second comb, respectively provided with interdigital fingers, adapted to be mobile relative to each other depending on the closing-spacing apart of the axes of the fingers, at least one finger of the first comb including a face opposite a face of a finger of the second comb wherein the axis of the finger of the first comb and the axis of the finger of the second comb are inclined relative to a plane orthogonal to the first direction of displacement of the combs, the plane being defined by the second and third directions perpendicular to the direction, and perpendicular to each other.
摘要:
Device for converting mechanical energy from the impact of objects into electrical energy, comprising a frame, a membrane suspended on said frame by at least a first and second longitudinal end, said membrane being intended to be impacted by said objects in a direction substantially transverse to a mid-plane of the membrane, said membrane comprising a core made from material for transducing mechanical energy into electrical energy, extending from the first longitudinal end to the second longitudinal end, and at least one electrode on a first face of the core and at least one electrode on a second face of the core, said electrodes extending from the first to the second longitudinal end.
摘要:
A capacitive device comprising at least one first and one second comb, respectively provided with interdigital fingers, adapted to be mobile relative to each other depending on the closing-spacing apart of the axes of the fingers, at least one finger of the first comb including a face opposite a face of a finger of the second comb wherein the axis of the finger of the first comb and the axis of the finger of the second comb are inclined relative to a plane orthogonal to the first direction of displacement of the combs, the plane being defined by the second and third directions perpendicular to the direction, and perpendicular to each other.
摘要:
A system for conversion of mechanical energy into electrical energy by electrostatic conversion that includes at least one fixed electrode (2) and at least one mobile electrode (4) that can be vibrated by mechanical energy, facing the fixed electrode, said fixed (2) and mobile (4) electrodes being separated at rest by an air gap distance (Δ). The system includes means (12) of modifying the air gap distance as a function of the variation of the vibration amplitude of the mobile electrode (4). An energy conversion method using such a system is also described.
摘要:
A variable capacitance device including at least one first fixed electrode and a second electrode free to move with respect to the fixed electrode, each electrode including a body and protuberances projecting from at least one face of the body. Each electrode is arranged such that the faces of each electrode provided with the protuberances are facing each other, the distance separating the two faces facing each other being greater than the sum of the heights of a protuberance from the fixed electrode and a protuberance from the mobile electrode. The electrodes are capable of moving with respect to each other in two parallel planes along at least one main direction.
摘要:
Optical pumping magnetometer with controlled polarization.This magnetometer comprises a linear polarizer (16), whose orientation is controlled (42,44) in such a way that the detection signal is at a maximum, no matter what the orientation of the field to be measured.Application to the construction of isotropic magnetometers.
摘要:
An electroactive polymer transducer comprising a membrane formed of an approximately rectangular electroactive polymer portion surrounded by two electrodes, at least two points of the membrane being connected to rigid supports, and comprising at least one deformable element for limiting the deformations that the membrane may undergo, the limiting element having a meandering form and being connected to the membrane in several approximately distributed points.
摘要:
A nuclear detection device, especially a gamma-camera type device which features deconvolution filters. In a gamma-camera variant, the device includes digital filters for deconvoluting electric measuring signals. A transfer function of these filters is opposite that of a circuit having formed the electric signals. It is then possible to separate any pulses which would overlap. Such a system finds particular application in nuclear physics and in particular in the medical field.
摘要:
A magnetometer for precise measurement of weak magnetic fields involves a system which injects a plurality of light beams into a gas containing cell. An optical multiplexer receives the light beams emitted by a source and successively supplies a plurality of light beams which traverse a corresponding number of polarizers. The beams are subsequently injected into the cell 10 in the plurality of different directions in order to optically pump the gas. A detection device detects an electrical resonance signal and supplies a plurality of signals corresponding to the optical pumping beams.
摘要:
An improved optical pumping magnetometer with sequential polarization for measurement of weak magnetic fields involves a device which sequentially modifies the polarization either in the direction of the polarization or from clockwise to counterclockwise circular polarization. As a result of the sequential modification of the polarization, the magnetometer for measurement of the weak magnetic fields has excellent isotropy while still retaining a simple construction and a small overall dimension to the device by using only a single cell.