Method and apparatus for space status detection based on acoustic chirp signals
AssigneeIndustrial Technology Research Institute
InventorsChang-Hong Lin, Ming-Yen Chen, Tai-Shih Chi
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Abstract
A method and an apparatus for space status detection based on acoustic chirp signals are provided. The method includes following steps. One of a plurality of acoustic chirp signals is transmitted into a space respectively at a plurality of different time points. A plurality of acoustic waves that are the transmitted acoustic chirp signals varied in the space are sequentially received to generate a plurality of acoustic spatial response signals, and a plurality of space features of the space are obtained based on the acoustic spatial response signals. A status change of the space is detected by comparing two of the space features.
Claims25
A method for space status detection based on acoustic chirp signals, comprising:
- transmitting one of a plurality of acoustic chirp signals into a space at a plurality of different time points respectively;
- sequentially receiving a plurality of acoustic waves that are the transmitted acoustic chirp signals varied in the space to generate a plurality of acoustic spatial response signals, and obtaining a plurality of space features of the space based on the acoustic spatial response signals;
- and
- detecting a status change of the space by comparing two of the space features.
An apparatus for space status detection based on acoustic chirp signals, comprising:
- a receiving device, sequentially receiving a plurality of acoustic waves that are a plurality of acoustic chirp signals varied in a space to generate a plurality of acoustic spatial response signals, wherein each of the acoustic chirp signals is respectively transmitted into the space at a plurality of different time points;
- a space feature generator, coupled to the receiving device to receive the acoustic spatial response signals and calculating a plurality of space features of the space based on the acoustic spatial response signals;
- and
- a determiner, coupled to the space feature generator to receive the space features and detecting a status change of the space by comparing two of the space features.
Dependencies are inferred from the claim text.