如何测量电压差在不同海拔地区-地球科学栈交流江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 07 - 07 - t17:08:48z //www.hoelymoley.com/feeds/question/20088 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/20088 1 如何测量电压差在不同海拔 eAndy //www.hoelymoley.com/users/20871 2020 - 08 - 18 - t17:45:28z 2023 - 06 - 06 - t12:06:20z 直接< p >想象两个点,一个在另一个的上方。< br > A - 10000英尺(PA) < br >点B - 20000英尺(PB) < / p > < p >想象这两点之间的电压潜力。< / p > < p > < /强> <强>问题:< / p > < ol > <李>你怎么能测量这些点之间的电压?李李< / > < >如果点在同一高度,但10英里远离对方。你怎么能测量电压潜力?(即PA在俄亥俄州10 k脚下和PB在印第安纳州在20 k英尺海拔,地面两点之间的距离是10英里)< /李> <李>你怎么能确定潜在的振荡?< /李> < / ol > //www.hoelymoley.com/questions/20088/-/20089 # 20089 0 具体化的回答如何测量电压微分在不同的海拔 具体化 //www.hoelymoley.com/users/20928 2020 - 08 - 18 - t20:54:48z 2023 - 01 - 07 - t11:46:13z 李< blockquote > < ol > < >你怎么能测量这些点之间的电压?< /李> < / ol >

I imagine you could measure the potential difference using weather balloons. Send one balloon up to 10,000 ft (Balloon A) and one to 20,000 ft (Balloon B) with wires connecting them to a voltmeter. The challenge here is to account for the wire resistance, which, if the potential difference is low, will in all likelihood interfere with the measurement. If the difference is too low to be measured, you would have to amplify the voltage and then account for the amplification and wire resistance.

  1. What if the points were at the same altitude, but 10 miles away from each other. How could you measure the voltage potential? (i.e. PA is in Ohio at 10k feet and PB is in Indiana at 20k feet altitude - ground distance between the two points is 10 miles)

I would try using weather balloons again, but obviously Balloon A and Balloon B would be at the same altitude but 10 miles apart from each other.

  1. How could you determine if the potential was oscillating?

Instead of a voltmeter measure with an oscilloscope. There's going to be noise no matter what; what oscillations are produced by noise and what is actual oscillations is a judgment call. I would say that truly oscillating potential difference is likely to be low frequency, so to filter out high frequency noise connect the circuit to a low-pass filter before processing with the oscilloscope.

Another way to determine oscillations is to measure the voltage with a data logger and post-process with computer software; any programming language that can easily manipulate large amounts of data would be sufficient, even excel would work. Plot the voltage vs time using a linear regression model to smooth the noise out. As an example, python's numpy has a regression function called polyfit. With a linear regression model and a moving window you will truncate the beginning and end of the dataset, but that shouldn't matter if you have a lot of data.

Baidu
map