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Local monitoring wireless sensor of vinylidene difluoride

A polyvinylidene fluoride, polyvinylidene fluoride piezoelectric technology, applied in instruments, analytical materials, material inspection products, etc., can solve the problems of poor reliability, high maintenance costs, large amount of monitoring network wiring, etc. The effect of installation and removal

Inactive Publication Date: 2005-10-12
欧进萍 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the data acquisition of various structural health monitoring is mainly realized by traditional "wired" sensors. Although this acquisition method has the characteristics of accurate signal acquisition, good immunity to interference, and The monitoring network has a large amount of wiring, high maintenance costs, poor reliability, and even wiring cannot be realized in some structures

Method used

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  • Local monitoring wireless sensor of vinylidene difluoride
  • Local monitoring wireless sensor of vinylidene difluoride
  • Local monitoring wireless sensor of vinylidene difluoride

Examples

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Embodiment 1

[0022] Embodiment 1. As shown in the figure, the composition of the polyvinylidene fluoride local monitoring wireless sensor includes a polyvinylidene fluoride piezoelectric film 1, a microprocessor composed of a microprocessor, a crystal oscillator circuit, an A / D modulation circuit and a filter circuit. Unit module 2, and wireless transceiver module 3. The polyvinylidene fluoride piezoelectric film is installed on the structure under test, the microprocessing unit module and the wireless transceiver module are set in the same housing and share a power supply 4, the UART port of the microprocessor is connected with the wireless communication module, and the polyvinylidene fluoride The vinyl piezoelectric film is connected with wires that can be input to the micro-processing unit module. A charge amplifier 5 is arranged between the polyvinylidene fluoride piezoelectric film and the microprocessing unit module. The micro-processing unit module, the wireless transceiver module an...

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PUM

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Abstract

A radio transducer consists of kynar piezoelectric film; microprocessing unit module formed by microprocessor, crystal oscillation circuit, A / D modulation circuit and filtering circuit; and radio transmit - receive module. It is featured as setting kynar piezoelectric film on structure to be tested, mocroprocessing unit module and radio transmit - receive module in the same shell for using one power supply; connecting microprocessor UART port to radio communication module and kynar piezoelectric film to wire of inputting - microprocessing unit module.

Description

(1) Technical field [0001] The invention relates to a monitoring device, in particular to a wireless sensor for local monitoring of civil engineering structures. (2) Background technology [0002] For some in-service structures or components in civil engineering, they may have different degrees of damage or defects due to various reasons, making the structures or components in a discontinuous state. When a structure or component with damage is subjected to alternating loads, even if the load level is far below the strength limit of the material itself, cracks may initiate and expand, resulting in a decrease in the resistance of the structure or component, and a decrease in safety indicators, resulting in Security risks. Monitoring the crack initiation and propagation of structures can provide direct information for structural safety assessment and damage location, and is one of the important measures to ensure structural safety. [0003] At present, the data acquisition of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38G01N35/00
Inventor 欧进萍喻言具典淑
Owner 欧进萍
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