中国海洋大学声学基础实验报告 - 图文

c=1500; fs=6000;

td=0.5*fs;%需要的点数

loc=[0.0,0.0;0.99,-0.11;1.98,-0.21;2.97,-0.32;3.96,-0.43;4.59,-0.53;5.59,-0.64;6.39,-0.75;7.94,-0.84;8.95,-0.90;9.94,-0.95;10.94,-1.01;11.94,-1.07;12.93,-1.13;13.93,-1.19;14.93,1.25;15.93,-1.29;16.94,-1.29;17.93,-1.29;18.93,-1.29;19.93,-1.29;20.92,-1.29;21.92,-1.29;22.92,-1.29;23.92,-1.29;24.92,-1.29;25.92,-1.29;26.92,-1.29;27.92,-1.29;28.92,-1.29;29.92,-1.29;30.90,-1.29];

signd=zeros(361,td);%时延加和信号 theta=-pi:pi/180:pi; for count=1:361

timdelay=round(loc*[cos(theta(count));sin(theta(count))]/c*fs); for cell=1:32

signd(count,:)=signd(count,:)+data(cell,110001+timdelay(cell):110000+td+timdelay(cell)); end end

target=sum((signd.^2)');

plot(theta*180/pi,target/max(target),'b');

time-domaine-signals0.10.080.060.040.020-0.02-0.04-0.06-0.08-0.100.20.40.60.811.21.41.61.8x 102-3v

f/khz ch2/mv ch3/mv 30 13.8 13.2 35 15.5 15.9 40 14.0 15.2 45 15.1 15.1 50 19.5 16.8 55 33.2 29.0 60 45.0 39.6 65 47.6 42.2 70 47.6 43.5 75 46.4 43.4 80 40.7 38.2 0.060.050.04ch2ch3u/v0.030.020.010-0.01 2.533.544.5t/s55.566.57x 10-4

修正后两接收声纳的灵敏度0.050.0450.040.035ch2ch3 ue/v0.030.0250.020.0150.01 33.544.555.510khz66.577.58速度，加速度频率曲线1 10.80.80.60.60.40.40.2volocityaccelerationtheoretical acceleration0 0100200300400500600frequency/hz7008009000.201000mm/sm/s2