Piezoelectric transducer and intelligent wireless sensing network node based on piezoelectric energy recovery

A piezoelectric transducer and energy recovery technology, applied in the direction of using electric/magnetic devices to transfer sensing components, network topology, wireless communication, etc., to achieve the effects of low power consumption, high integration, and small size

Inactive Publication Date: 2010-09-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the intelligent wireless sensor network node of this technical solution is also designed for low power consumption, it requires an additional power supply for power supply

Method used

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  • Piezoelectric transducer and intelligent wireless sensing network node based on piezoelectric energy recovery
  • Piezoelectric transducer and intelligent wireless sensing network node based on piezoelectric energy recovery
  • Piezoelectric transducer and intelligent wireless sensing network node based on piezoelectric energy recovery

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Experimental program
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Embodiment 2

[0051] Embodiment two: if figure 2 As shown, this embodiment is a piezoelectric transducer, which includes a cantilever beam 2 connected to the external structure at one end, and a mass block 3 is provided at the other end of the cantilever beam, wherein the thickness of the end of the cantilever beam 2 connected to the external structure is Greater than the thickness of the other end, it has good electromechanical coupling with the vibration in the external environment. The longitudinal section of the cantilever beam is an isosceles trapezoid, wherein the angle between the two sides of the isosceles trapezoid is 0.82 degrees. Its first-order resonance frequency can be adjusted by changing the mass at the end of the beam. The cantilever beam in this example is made of copper material. The mechanical size is 90mm long and 22mm wide. The thickness of the thick end, that is, the end connected to the structure, is 2mm, and the thickness of the thin end, that is, the end where th...

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PUM

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Abstract

The invention discloses an intelligent wireless sensing network node based on piezoelectric energy recovery, comprising an energy recovery unit, a resistance strain sensor signal conditioning unit and a wireless transceiving and data processing unit. A self-powered wireless sensing system is realized by utilizing piezoelectric energy recovery without external energy, battery replacing or maintenance, the system has the power consumption as low as 4.9MW, and the real-time monitoring performance is ensured at the same time. An engineering structure health monitoring wireless sensing network established by the intelligent wireless sensing network node based on energy self-supplying can replace a traditional battery supply monitoring network system, and has the advantages of light weight, small size, no environment pollution, no need of replacing battery, and the like. The invention also discloses a piezoelectric transducer comprising a cantilever beam, wherein the other end of the cantilever beam is provided with a mass block, at least one piezoelectric piece is attached to the cantilever beam, and the thickness of the end of the cantilever beam connected with an external structure is greater than the thickness of the end provided with the mass block.

Description

1. Technical field [0001] The invention relates to a device for engineering structure health monitoring, in particular to an intelligent wireless sensor network node capable of recovering energy without energy supply. Also relates to a piezoelectric transducer applied to piezoelectric energy recovery 2. Background technology [0002] Structural health monitoring technology is a branch of intelligent structure technology. With the increasing attention to the safety of aircraft structures and large-scale infrastructure structures, this technology has attracted more and more attention. Structural health monitoring is a new type of technology that uses the advanced sensor / drive element network integrated in the structure to obtain information related to the health of the structure online and in real time, and to control and eliminate the unsafe factors existing in the structure at an early stage. Interdisciplinary. At present, structural health monitoring technologies are main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16G01H11/08H04W84/18G01D5/16
Inventor 裘进浩沈辉张超吴一丰徐姣季宏丽朱孔军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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