附带一个问题

我是用来分辨两束光的，因为光速太快了，所以算来算去
采样率至少得120MHz，这么高的采样速率的卡似乎没有，
有也太贵了。有没有什么办法在低的采样率下还是可以分辨
出两束光。谢谢！
.3

根据什么原理来分辨两束光？
.16

完全靠采集卡采集到的两个信号的时间差来达到定位的目的，
定位的精度决定了采集卡的采样率，这个似乎不行
我没有那么多钱买那么高级的采集卡
原理问题没考虑清楚，唉！
.3

I know an application. It was to detect leakage on the high-pressure power lin
e. If there is a leakge on the line, a voltage drop occurs. If you can catch t
he change, you could probably detect the location of the leakge. I uppose the
power propagates at the speed of light.
Because you only care about the change, rather than the power propagation itse
lf, you may not need a very high speed DAQ card. Anyway, it depends on how fas
t is the voltage drop.
.233