发明名称 |
Detection of ingress of water in an intermediate layer using acoustic resonance technology |
摘要 |
An apparatus and a method for determining a moisture ingress in an insulating layer surrounding a pipe, the insulating layer being surrounded by a tubular jacket. The apparatus includes an acoustic transducer in communication with an exciter adapted to provide a brief and broad banded acoustic signal which includes frequencies which by their propagation in the material of the jacket has a wavelength which corresponds to twice the thickness of the jacket or an odd multiple of twice the thickness of the jacket, and to process a reverberation signal emitted from the jacket in response to sending into the jacket the brief and broad banded output signal from the transducer. The signal processor is adapted to make a frequency analysis of the received reverberation signal for producing a frequency response curve, to establish features of the frequency response curve which are characteristic of a moisture content in the insulation material on the inside of the jacket, and to output an indication being specific for the moisture ingress. |
申请公布号 |
AU2008297649(B2) |
申请公布日期 |
2014.04.03 |
申请号 |
AU20080297649 |
申请日期 |
2008.09.09 |
申请人 |
HALFWAVE AS |
发明人 |
NORLI, PETTER;NEGARD, NILS OTTO;OLSEN, AGE A.;LAG, STEINAR;BERGH, ASHILD;HALAS SKAR, TORE MAGNE;JACOBSEN, JOSTEIN |
分类号 |
G01N29/42;G01B17/00;G01M3/24 |
主分类号 |
G01N29/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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