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Long Range Fire Detection using a Parabolic Sound Reflecting Plate based on Sound Field Variation
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- Authors
- Dae-Woong Jang, Min-Hong Ahn, Seung-Hoon Park, Sang-Woo Lee, Seung-Joo Kim, Ju-Cheol Lee, Yi-Gyeong Kim, Kang-Ho Park
- Issue Date
- 2020-08
- Citation
- International Congress and Exhibition on Noise Control Engineering (Inter-Noise) 2020, pp.1-8
- Language
- English
- Type
- Conference Paper
- Abstract
- Long range fire detection technology using a parabolic sound reflecting plate based on sound field variation is proposed. Sound for the sound field variation monitoring is collimated from the speaker placed at the focal point of the parabolic sound reflecting plate, and the reflected sound is collected by the microphone place near the focal point of the parabolic sound reflecting plate. The fire in the far distant area to the focal direction of the parabolic can be detected by measuring frequency shift depending on the temperature change in sound field spectrum. The collimation and collection of sound using the parabolic reflecting plate is analysed with the finite element analysis method and the performance of fire detection in the far distant area is experimentally verified. The gas burner fire at the distance of 11.5m could be detected within 22 seconds based on sound field variation method using 17 channel multi-tone sound source around 4kHz in combination with the parabolic sound reflecting plate. This kind of technology could be applied for the early stage fire detection in the warehouse, compartment, and hall with high floor height.
- KSP Keywords
- Analysis method, Detection technology, Finite Element(FE), Finite-element method(FEM), Fire Detection, Gas burner, Long range, Measuring frequency, Sound field, Sound source, Temperature change