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
CN1680815AInactive Publication Date: 2005-10-12欧进萍 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
欧进萍
Publication Date
2005-10-12
Estimated Expiration
Not applicable · inactive patent

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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.
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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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