Time between excitation wave and received waves

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LINDO MTSWENI 2021-6-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/856880-time-between-excitation-wave-and-received-waves

评论： Star Strider 2021-6-16

sample.fig

If I have graph of voltage vs time for the excitation signal and the received signal for a material...how do I calculate the time it takes for the wave to move from one side of the material to the other side.. the blue signal is the excitation then the orange signal is the received one

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Jonas 2021-6-15

can you provide an image or data so we can see the excitation signal and the resulting signal?

LINDO MTSWENI 2021-6-15

编辑：LINDO MTSWENI 2021-6-15

sample.fig

attached is the figure ... thye blue signal is the excitation then the orange one is the received signal

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Answer 1

Star Strider 2021-6-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/856880-time-between-excitation-wave-and-received-waves#answer_725505

在 MATLAB Online 中打开

Try this —

F = openfig('sample.fig');
Ax = gca;
Lines = findobj(Ax, 'Type','line')
sent = findobj(Lines,'DisplayName','Excitation Signal');
Xsent = sent.XData;
Ysent = sent.YData;
recd = findobj(Lines,'DisplayName','Received Signal');
Xrecd = recd.XData;
Yrecd = recd.YData;
Ysidx = Ysent>0.01;                                                 % Threshold Signal
Yridx = Yrecd>0.01;                                                 % Threshold Signal
Yss = find(Ysidx,1,'first');                                        % First 'true' Index
Yrs = find(Yridx,1,'first');                                        % First 'true' Index
[istart,istop,dist] = findsignal(Yrecd(Yridx), Ysent(Ysidx));
figure
findsignal(Yrecd(Yridx), Ysent(Ysidx))
grid
figure
subplot(2,1,1)
plot(Xsent, Ysent)
% text(Xsent([istart istop])+Xsent(Yss), [0 0], compose('\\leftarrow t = %8.5E', Xsent([istart istop])+Xsent(Yss)), 'Rotation',90)
title('Sent')
grid
subplot(2,1,2)
plot(Xrecd, Yrecd)
text(Xrecd([istart istop])+Xrecd(Yrs), [0 0], compose('\\leftarrow t = %8.5E', Xrecd([istart istop])+Xrecd(Yrs)), 'Rotation',90, 'Horiz','left', 'Vert','middle')
title('Received')
grid