50 results about "Central mass" patented technology

The invention relates to a piezoelectric multi-direction vibration energy acquisition device, and belongs to the technical field of new energy and power generation. A frame is arranged on a base via abolt, a side plate is arranged on each surface via a bolt, an inertia block is connected with each side plate via a buffer spring, a piezoelectric oscillator group is fixedly at the periphery of eachinertia block, each inertia block is connected with a central mass block via a spring, the piezoelectric oscillator group is formed by pasting a metal substrate and a piezoelectric chip, each piezoelectric oscillator group is connected in parallel via a wire, parallel connection means that each metal substrate is connected via a wire and each piezoelectric hip is connected via a wire, a rectification circuit and an energy storage device are fixedly arranged on the base, and the rectification circuit is connected with the piezoelectric oscillator and the energy storage device via a wire. The piezoelectric multi-direction vibration energy acquisition device has the advantages that low-frequency vibration energy can be achieved in an arbitrary direction, and the piezoelectric multi-directionvibration energy acquisition device has the characteristics of high reliability and high energy efficiency.

The invention discloses a three-dimensional vector hydrophone capable of suppressing vibration in X and Y directions. The three-dimensional vector hydrophone capable of suppressing vibration in the Xand Y directions comprises a substrate and cilia, wherein the substrate is composed of a central mass block, beams and a frame, and a piezoresistor is arranged at the tail end of each beam. Each edgeof the center mass block is suspended on the frame by every two beams, that is, the right edge of the center mass block, the upper edge of the center mass block, the left edge of the center mass blockand the lower edge of the center mass block are separately connected with the frame by the beams, and the center mass block is suspended on the frame. A certain gap is reserved among the mass block,the beams and the frame, and the overload resistance is achieved by limiting the displacement of the central mass block in the X and Y directions in a cartesian coordinate system; a certain gap is reserved between the central mass block and a lower cover plate, and the overload resistance is achieved by limiting the displacement of the central mass block in the Z direction in cartesian coordinates; and as the thickness and area of the central mass become larger, the bending moment of the mass block to the beams can offset the bending moment of the cilia to the beams when the hydrophone is subjected to vibration signals so as to reduce the vibration sensitivity of the hydrophone.