4results about How to "Improve electromechanical conversion efficiency" patented technology

The invention provides an ultrasonic transducer and ultrasonic cleaning equipment, the ultrasonic transducer comprises a piezoelectric exciter and a vibration radiant panel, the vibration radiant panel is fixed on the piezoelectric exciter, a power supply is electrically connected with the piezoelectric exciter, so that the piezoelectric exciter can generate longitudinal vibration, and the longitudinal vibration of the piezoelectric exciter can excite bending vibration of the vibration radiant panel. The longitudinal vibration sandwich type piezoelectric ultrasonic transducer solves the defects that an existing longitudinal vibration sandwich type piezoelectric ultrasonic transducer is small in radiation area, weak in longitudinal displacement amplitude, long in longitudinal size and the like to a great extent, and has the advantages of being small in space needed by operation, large in sound radiation area and sound radiation power, small in size and the like. The ultrasonic transducer can be widely applied to the application requirements of miniaturization and thinning of the installation space of the ultrasonic transducer. Meanwhile, the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer can be influenced by the length, and / or the width and / or the thickness of the vibration radiant panel, so that the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer is further improved through the size of the vibration radiant panel.

The utility model relates to a damping rectification structure, a suspension system and a vehicle, and relates to the technical field of vehicles, and the damping rectification structure comprises a movable part, a conversion part and a power recovery part. The movable part is used for connecting an excitation object and responding to reciprocating motion generated by external excitation; the first end of the conversion part is in transmission connection with the movable part, the second end is in transmission connection with the power recovery part, and the conversion part is used for converting movement of the movable part in different directions into directional rotation of the power recovery part. By arranging a mechanical transmission structure with a rectification function, the power recovery part always keeps rotating in a single direction, so that electromagnetic energy loss and mechanical abrasion caused by frequent reversing are reduced, the energy recovery efficiency is improved, and the service life of the system is prolonged. The structure is suitable for excitation environments such as a vehicle suspension system, the design of a control system can be simplified, and structural stability and practicability are enhanced.

The invention relates to a vibration energy collector for power supply of an electric toothbrush, comprising a vibration beam (1) and a vibration amplification device, the vibration beam (1) is an arched iron sheet with MFC sheet (2) pasted on the inner side of several concaves, the vibration amplification device comprises an iron ball (3) and a spring (4). Compared with the prior art, the invention has the advantages of high system output power, long service life, stable work and the like.

This invention discloses a piezoelectric MEMS device, its fabrication method, and its applications, belonging to the field of microelectromechanical systems (MEMS) technology. The fabrication method includes: preparing an SOI wafer; performing PSG spin-coating annealing and / or metallization modification on the device layer surface to form a conductive seed layer; depositing a piezoelectric layer; simultaneously etching the insulating layer, modified device layer, and piezoelectric layer using a specific mixed gas or pulse modulation process; forming a metal electrode layer and a bonding metal layer; and bonding and integrating with a TSV structure. This invention replaces traditional metal electrodes with metallization modification, avoiding electrode fatigue and aging, and improving device reliability; the use of single-mask synchronous etching and vapor phase release technology eliminates overlay and bonding errors, reducing process complexity and cost, making it suitable for high-performance sensors, ultrasonic detection, audio, and smart hardware.