Fire extinguishing system based on sound wave fire extinguishing and fire extinguishing method thereof

Abstract

The invention provides a fire extinguishing system based on sound wave fire extinguishing and a fire extinguishing method thereof. The fire extinguishing system based on sound wave fire extinguishing comprises a waveform generator used for generating low-frequency sound wave analog electric signals, a power amplifier used for amplifying the low-frequency sound wave analog electric signals, an electro-acoustic transducer used for converting the amplified low-frequency sound wave analog electric signals into low-frequency longitudinal waves and directionally transmitting the low-frequency longitudinal waves in the transverse direction, and a partition body used for reflecting the low-frequency longitudinal waves to form a superposed sound field and carrying out reflection enhancement on the transmitted longitudinal waves in the advancing direction of the low-frequency longitudinal waves. A stable superposed sound field is formed in the interval space between the electro-acoustic transducer and the partition body, and a high pressure gradient generated in the superposed sound field can cause a transverse density difference at the moving position of the moving flame, so that the flame of the moving flame transversely deviates from a fuel area, the flame is quickly extinguished in the superposed sound field, and spreading and secondary ignition of moving flames are prevented. 本发明提供了一种基于声波灭火的消防系统及其灭火方法，基于声波灭火的消防系统包括用于产生低频声波模拟电信号的波形发生器、用于将低频声波模拟电信号进行放大的功率放大器、用于将放大后的低频声波模拟电信号转换成低频纵波并将低频纵波沿横向定向发射的电声换能器的电声换能器，以及用于反射低频纵波以形成叠加声场的隔断体，则隔断体在低频纵波的行进方向上对发射纵波进行反射增强，在电声换能器与隔断体之间的间隔空间内形成稳定的叠加声场，叠加声场内产生的较高的压力梯度会在移动火焰的移动位置引发横向密度差，使移动火焰的火焰横向偏离燃料区，使火焰在叠加声场中快速熄灭，防止移动火焰的蔓延及二次引燃。