APPARATUS AND METHOD OF MONITORING GAS BASED ON VARIATION IN SOUND FIELD SPECTRUM

摘要

A gas monitoring apparatus according to the inventive concept includes a sound generator, a sound receiver, and a sound field signal processor. The sound generator continuously outputs a sound signal into a gas monitoring space. The sound receiver receives a sound signal reflected from the gas monitoring space. The sound field signal processor obtains sound field information on the received sound signal, calculates a sound field spectrum for the sound field information, uses a correlation between the calculated sound field spectrum and a reference sound field spectrum, and determines whether there are gas leak and mixing in the gas monitoring space, wherein the reference sound field spectrum is a sound field spectrum according to frequency measured in a case where a gas is not leaked in the gas monitoring space, and the sound signal is formed by a linear sum of sine waves that have a plurality of frequency components.

主权项

1. A gas monitoring apparatus comprising:
a sound generator configured to continuously output a sound signal into a gas monitoring space; a sound receiver configured to receive a sound signal reflected from the gas monitoring space; and a sound field signal processor configured to obtain sound field information on the received sound signal, calculate a sound field spectrum for the sound field information, use a correlation between the calculated sound field spectrum and a reference sound field spectrum, and determine whether there are gas leak and mixing in the gas monitoring space, wherein the reference sound field spectrum is a sound field spectrum according to frequency measured in a case where a gas is not leaked in the gas monitoring space, and the sound signal is formed by a linear sum of sine waves that have a plurality of frequency components.