| 摘要 |
A method of the present invention includes exposing a structure to first electromagnetic radiation including at least one wavelength absorbed by a predetermined substance that is to be detected. Such substance can be water, a water-soluble substance, or fungi, the presence of which can be a significan t problem in a structure such as a house or building. The method includes sensing second electromagnetic radiation from the structure, the second radiation based on the first radiation. The method also includes determining whether the substance is present in the structure, based on the sensed secon d radiation. If the substance to be detected is water and the determining step reveals a water-suspect area in the structure, the method can include testin g the water-suspect area of the structure to determine whether water is presen t therein. If water is confirmed by the determination to be present in the structure, the method can include a step of determining the source of the water.
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