Rebar corrosion monitoring sensor based on acoustic surface wave
A technology for monitoring sensors and surface acoustic wave devices, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and instruments. Low accuracy and other problems, to achieve the effect of enhancing environmental adaptability, high measurement accuracy, and high accuracy
Inactive Publication Date: 2018-05-04
ARMY ENG UNIV OF PLA
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Problems solved by technology
None of these physical methods directly sense the corrosion of steel bars, which makes the monitoring less accurate and less reliable, and most of the sensors have many components and complex structures, making it difficult to achieve long-term real-time on-line monitoring
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[0019] Such as figure 1 As shown, the steel bar corrosion monitoring sensor based on the surface acoustic wave of the present invention includes a surface acoustic wave device 1, a sensing electrode 2 and a reference electrode 3;
[0020] One end of the surface acoustic wave device 1 is electrically connected to the sensing electrode 2, and the other end is electrically connected to the reference electrode 3;
[0021] The sensing electrode 2 is arranged around the steel bar 4 to be tested, and the reference electrode 3 is arranged in the same environment as the steel bar 4 to be tested;
[0022] The sensing electrode 2 is used to sense the impedance change caused by the corrosion of the steel bar 4 to be measured;
[0023] The reference electrode 3 is used to sense the impedance change caused by the same environment as the steel bar 4 to be tested.
[0024] Preferably, the surface acoustic wave device 1 includes a piezoelectric substrate 11, a transducer 12 placed in the mid...
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The invention discloses a rebar corrosion monitoring sensor based on acoustic surface wave, which comprises a acoustic surface wave device (1), a sensing detecting electrode (2) and a reference electrode (3), one end of the acoustic surface wave device (1) is electrically connected with the sensing detecting electrode (2), the other end is electrically connected with the reference electrode (3); the sensing detecting electrode (2) is arranged around a to-be-detected rebar (4), the reference electrode (3) is arranged on the same environment of the to-be-detected rebar (4); the sensing detectingelectrode (2) is used for sensing and detecting impedance change caused by the corrosion of the to-be-detected rebar (4); the reference electrode (3) is used for sensing and detecting the impedance change caused by the same environment of the to-be-detected rebar (4). The rebar corrosion monitoring sensor based on acoustic surface wave provided by the invention has advantages that the accuracy ishigh, the reliability is good, the structure is simple, the passive work and wireless communication can be realized and is very suitable for performing long-period real-time online monitoring on therebar corrosion in an embedded mixed steel structure.
Description
technical field [0001] The invention belongs to the technical field of steel bar corrosion monitoring devices for civil structures, in particular to a surface acoustic wave-based steel bar corrosion monitoring sensor with high accuracy, good reliability and simple structure. Background technique [0002] Steel corrosion is one of the main factors affecting the durability of civil structures. Once the steel bar in the structure is corroded, the stress section of the steel bar will be reduced, resulting in a decrease in the bearing capacity of the steel bar and a decrease in the ultimate elongation. Corrosion of steel bars will also produce rust expansion stress, which will cause cracking and crack expansion along the bars. Corrosion of steel bars also reduces the bond between steel bars and concrete. Therefore, in order to ensure the safety of civil structures, it is necessary to monitor the corrosion of steel bars. [0003] At present, there are mainly physical methods an...
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CPCG01N29/041G01N2291/018G01N2291/0234
Inventor 谢立强邢建春朱玺峰王添仙杨启亮王荣浩
Owner ARMY ENG UNIV OF PLA