X-axis and Y-axis detection

Question

khoo chai 2015-2-23

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编辑： khoo chai 2015-2-24

Hello,

I've got a signal as attached. What I'm trying to do is to detect the signal based on its Amplitude & time difference. So that it will detect and printout as follow:

"NORMAL" when (1.1 > Amplitude > 0.9) | (time difference doesn't matter)

"SAG" when (0.9 >= Amplitude >= 0.1) | (4 >= time difference >= 2)

"UNKNOWN" when (0.9 >= Amplitude >= 0.1) | (time difference <= 1)

So that based on signal, I should get:

"SAG,NORMAL,UNKNOWN,NORMAL,UNKNOWN,NORMAL,SAG,NORMAL,SAG"

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Answer 1

Abhishek GS 2015-2-24

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Hi Khoo,

Do you have the signal values in MATLAB or are you reading from any sensor in real time ? Also what do you mean by time difference ? Is it time difference between the last time the same value got recorded?

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khoo chai 2015-2-24

编辑：khoo chai 2015-2-24

Hi Abhishek,

I'm sorry for my mistake and I've edited the document above. Actually it was voltage signal in real time. The time difference means that from 1s to 4s (by referring to "amplitude and time detection.jpg") the time difference is 3s. From 5s to 7s the time difference is 2s and etc...So that based on the conditions (Amplitude & time difference) that I've listed above, from 1s to 4s it is "SAG" due to (0.9 >= Amplitude >= 0.1) | (4 >= time difference >= 2). Then, it is "NORMAL" due to (1.1 > Amplitude > 0.9) | (time difference doesn't matter). Next is "UNKNOWN" due to (0.9 >= Amplitude >= 0.1) | (time difference <= 1) and etc...

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