Oil fume concentration detection device and detection method thereof

摘要: The invention discloses an oil fume concentration detection device comprising a laser emitter, frosted glass and optical diffraction element. the element are sequentially arranged at downstream of emitter on emission path. Besides, also includes CCD camera that is used for shooting speckle image formed after emitted by passes through In addition, method extractor hood applying device. Laser images shot in one area canbe performed to obtain distribution space. reliability high.