Non-power consumption accelerometer based on magnetostriction and piezoelectric effect

Abstract

The invention relates to a power consumption free accelerometer based on magnetostriction and piezoelectric effect in the technical field of sensors, which comprises an upper permanent magnet, a lower permanent magnet, a magnet supporting frame, a right cantilever beam, a left cantilever beam, an upper magnetostrictor, a lower magnetostrictor, an upper piezoelectric film, a lower piezoelectric film and an accelerometer fixing frame. When outside acceleration exists, due to the action of the inertia, the permanent magnets can generate a displacement in a positive or an opposite direction so asto make the intensity of a magnetic field passing the magnetostrictors change. Due to the magnetostriction effect, the magnetostrictors generate corresponding deformation, and drive the piezoelectricfilms to generate corresponding deformation. Due to the piezoelectric effect, the surfaces of the piezoelectric films generate direct current voltage signals of which the magnitude is in direct proportion to the outside acceleration, and the signals are used as the detecting signals of the outside acceleration. The accelerometer has the advantages of no power consumption, simple structure, easy processing, no need of sealing vacuum or special requirements, direct current voltage signals used as the detecting signals, convenient detection and high reliability.

Description

technical field [0001] The invention relates to an accelerometer in the technical field of sensors, in particular to a non-power consumption accelerometer based on magnetostriction and piezoelectric effects. Background technique [0002] Accelerometers are the core components of technologies such as trajectory tracking, attitude control and inertial guidance. Accelerometer research has increased in recent decades, mostly focusing on capacitive accelerometers (operating principles that utilize capacitive drive or capacitive sensing). With the development of inertial technology and the increasing demand for guidance and civil accelerometers such as satellites and missiles, the requirements for accelerometers also increase, such as low power consumption, low cost, simple packaging, and adaptability to harsh environments. [0003] Through the patent search of the existing technology, it is found that the patent "A Differential Capacitive Micromachined Accelerometer", publicatio...

AI Technical Summary

Problems solved by technology

Many traditional accelerometers that do not need to detect capacitors and resistors need to be driven, which will introduce signal sources and increase power consumption

Moreover, most accelerometers have complex structures in order to improve accuracy, and require vacuum packaging, which leads to increased costs.

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