水下气泡幕激光后向探测中的信号起伏和干扰抑制

水下气泡幕的激光后向探测实验中发现，由于气泡幕的存在，信号有时得到增强，有时会减弱。对该问题进行分析，将探测区域分为三个组成部分，对三部分信号进行比较分析，从而找出影响信号强度的因素，并通过实验进行验证。结果表明，信号的强度是增强还是减弱，主要取决于气泡幕本身的信号强度，它与气泡幕的距离以及气泡密度等因素有关。对同一距离上相同密度的气泡幕进行探测，适当增大探测器和发射器之间的距离，可以提高有无气泡时的差异，从而提高系统探测性能。

Signal Fluctuating in Laser Backward Detection of Bubble Films in Water and Restraint of Water Interference

Signals sometimes increase and sometimes decrease on the experiment of laser backward detection of bubble films.To analyze this question,the detection section is divided into three parts,and three portions of signals are analyzed comparatively.So the factors which influence the signal intensity are ascertained,and the validating experiment is carried out.The results shows that the intensity of signals lie on the intensity of light backward scattering from bubble film which is related to distance and density,etc.To detect bubble film in the same distance and the same density,augmenting the distance between the laser and detector properly will favor the difference between signals having and having no bubbles,so it will favor laser backward detection of bubble films in water.