Self-powered triaxial acceleration sensor and detection method

A technology of axial acceleration and sensors, applied in multi-dimensional acceleration measurement, acceleration measurement using inertial force, electrical components, etc., to achieve the effects of easy overall structure of the device, simple processing technology, and low cost

Pending Publication Date: 2018-03-20
JILIN UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a self-powered three-axis acceleration sensor and a detection method to solve the problem that the traditional piezoelectr

Method used

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  • Self-powered triaxial acceleration sensor and detection method
  • Self-powered triaxial acceleration sensor and detection method
  • Self-powered triaxial acceleration sensor and detection method

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Embodiment Construction

[0017] Such as figure 1 , 2 As shown, it includes: a cantilever beam 1 , a piezoelectric layer 2 , a base mass 3 , an auxiliary mass 4 , a permanent magnet 5 , an electromagnetic induction coil 6 , a magnetic shielding layer 7 and a support structure 8 .

[0018] The four cantilever beams 1 are vertical in pairs and distributed in a cross shape, such as figure 1 As shown, the piezoelectric layer 2 is fixedly connected to the end of each cantilever beam 1, and the same base mass 3 is attached to the free end. The cantilever beam 1 and the base mass 3 are integrally processed. 8 connected, the cantilever beam 1 and the support structure 8 can be processed in one piece; when the cantilever beam 1 and the support structure 8 are made of different materials, the end of the cantilever beam 1 can be fixed on the support structure by bolt connection, and the material used for the bolt is non-magnetic Insulating materials such as nylon (Polyamide, PA), etc.;

[0019] The auxiliary m...

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Abstract

The invention provides a self-powered triaxial acceleration sensor and a detection method, which belongs to the technical field of energy materials and devices. Four cantilever beams are vertical in pairs and are distributed in a cruciform shape. A piezoelectric layer is arranged on the tail end of each cantilever beam to realize triaxial acceleration detection. The free end is connected with a base mass, and the tail end is connected with a support structure. The direct lower part of the base mass is fixedly connected with an auxiliary mass and a permanent magnet in sequence, and the base mass, the auxiliary mass and the permanent magnet form the entire mass. An electromagnetic induction coil is placed directly below the permanent magnet and on the inner bottom surface of the support structure to collect vibration energy to power the acceleration sensor. The acceleration sensor provided by the invention can detect acceleration in any direction, is self-powered, reduces the cost, and expands the application range.

Description

technical field [0001] The invention belongs to the technical field of energy materials and devices, and particularly relates to a self-powered three-axis acceleration sensor and a detection method based on the principle of electromagnetic induction. Background technique [0002] An acceleration sensor is an electronic device capable of measuring acceleration, and has been widely used in the automotive industry, aerospace, military equipment and other fields. Although the piezoelectric acceleration sensor does not need a power supply during detection, its output signal cannot be directly obtained by the AD acquisition circuit. It must be powered by a constant current source and its signal is conditioned into a standard signal. In wireless sensor network applications, due to the large number of nodes and large distribution range, the problem of battery replacement is difficult to solve; at the same time, for many applications that cannot provide power, require long-term monit...

Claims

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Application Information

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IPC IPC(8): G01P15/18H02N2/18H02K35/02
CPCH02K35/02H02N2/186G01P15/18
Inventor 王东方朱逸凡杨旭傅宇鹏宋杰洪婧储泽轩吕诚苑文楼曹曦
Owner JILIN UNIV
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