您好：
我使用的是一款picoscope 4425A的四通道PICO示波器，在使用电流探头时，实测波形和实际波形会有3~4us的延迟，使用示波器参考波形来补偿延迟，来进行积分计算，发现参考波形的积分结果跟实际波形的积分结果有很大差值，具体波形图可参考上次提问的帖子《PICO示波器数学通道计算不准确？》
有什么方法可以消除该误差或者更好的积分方法？
感谢各位！
PICO示波器参考波形积分问题
Re: PICO示波器参考波形积分问题
Do you have low pass filtering on in the settings ?
Benno
Benno
Re: PICO示波器参考波形积分问题
未打开低通滤波，参考波形复制的也是未打开低通滤波的波形
Re: PICO示波器参考波形积分问题
can you post a .psdata via https://wetransfer.com/
Also the current probe works with hall sensors and thye have some opamps in it to amplify the output of the hall sensor, they usually have a bandwidth of around 10kHz so a delay of some sort is to expect from this kind of sensor.
If possible you can use a shunt resistor (depending on where you want to measure the current) because all ground clips of the scope are connected together (for all but 2 types of picoscope)
Benno
Also the current probe works with hall sensors and thye have some opamps in it to amplify the output of the hall sensor, they usually have a bandwidth of around 10kHz so a delay of some sort is to expect from this kind of sensor.
If possible you can use a shunt resistor (depending on where you want to measure the current) because all ground clips of the scope are connected together (for all but 2 types of picoscope)
Benno
Re: PICO示波器参考波形积分问题
I have made a comparison between different methods of current measurement.
See attached .psdata file. Measured on a 1 ms pulse of 11A DC rising and falling edges are of interest for you.
Benno
See attached .psdata file. Measured on a 1 ms pulse of 11A DC rising and falling edges are of interest for you.
Benno
- Attachments
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- hantec vs fluke vs pico TA300 vs shunt.psdata
- (373.59 KiB) Downloaded 454 times
Re: PICO示波器参考波形积分问题
Hi Benno:
感谢您的对于不同电流探头测量的分享，现在我想用PICO示波器自带的参考波形来消除电流测量的延迟误差，但是在参考波形的积分上出现了问题，我不清楚是什么原因，实际波形和参考波形的积分图像不一致，下面是我分享的.psdata文件。
https://we.tl/t-AaWXEPDeqR
感谢您的对于不同电流探头测量的分享，现在我想用PICO示波器自带的参考波形来消除电流测量的延迟误差，但是在参考波形的积分上出现了问题，我不清楚是什么原因，实际波形和参考波形的积分图像不一致，下面是我分享的.psdata文件。
https://we.tl/t-AaWXEPDeqR
Re: PICO示波器参考波形积分问题
Got message file is corrupt. (more like encrypted or something like "%TSD-Header-" at the start if the file.
Can you retry uploading it to we transfer.
Benno
Can you retry uploading it to we transfer.
Benno
Re: PICO示波器参考波形积分问题
您好，因为加密系统的原因，我可能不能上传解密后的文件，下面是我使用参考波形和原始波形积分的图像，积分公式相同，只有参考波形和原始波形的差异（参考波形和原始波形均未打开低通滤波），目前的积分结果是不一致的；
是否PicoScope 6对参考波形的积分有一定的误差？
是否PicoScope 6对参考波形的积分有一定的误差？
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Re: PICO示波器参考波形积分问题
您好：
该问题是否可以帮忙解答一下，感谢
该问题是否可以帮忙解答一下，感谢