Linear acceleration sensor for bionic-ear stone implement structure

Abstract

The invention discloses a linear acceleration sensor for a bionic-ear stone implement structure, and the acceleration sensor comprises a rigid housing, a flexible elastic body, a plurality of parallel piezoelectric fibers comprising metal cores, a rigid element pasted at the top of the flexible elastic body, and an elastic element connected with the rigid element and the external rigid housing, wherein the piezoelectric fibers are fixed at the bottom of the grid housing. The symmetric electrodes of the piezoelectric fibers are led out through two wires, and the two wires are respectively connected to the positive and negative electrodes of an input end of a charge amplifier. The whole sensor is fixed on a vibration exciter. When the vibration exciter vibrates up and down, the elastic element stretches and withdraws and drives the rigid element. At this moment, the flexible elastic body will deform, and the piezoelectric fibers will also deform elastically. Moreover, the piezoelectric fibers in the flexible elastic body will obtain an impact signal. Because of the piezoelectric effect, surface electrodes on a piezoelectric material will generate charges. Because the positions of electrodes are different, the charges generated on the electrodes or the voltages are different. Therefore, the acceleration information can be obtained through the collection of the charge signals on the electrodes and the data processing and analysis.

Description

technical field [0001] The invention discloses a linear acceleration sensor with an otolith-like structure, which is a new type of sensor capable of measuring linear acceleration, with a relatively simple structure and high precision. Background technique [0002] As one of the components of the vestibular nervous system, the otolith organ, like the semicircular canal, has receptors, conduction nerve pathways and control centers. Like the semicircular canal, it has vestibular eye movement, vestibular spinal cord, vestibular cerebellum, vestibular autonomic nervous system, vestibular cortical pathway and corresponding reaction. Different from the semicircular canal system, its suitable stimulus is not angular acceleration, but gravity and linear acceleration. The functions of the otolithic system can be divided into three categories: (1) perception of spatial orientation and linear motion; (2) generation of compensatory eye movements for head linear acceleration; (3) partici...

AI Technical Summary

Problems solved by technology

Due to the limitations of this principle, it is determined that the test environment has high requirements and high cost, and it is difficult to meet the requirements for detecting linear acceleration.

Images