floating signal with a time dependent thresholding

Hi all

I have a floating signals that need a time threshold function. For example, if the signal to pass more than 0.2 V in less than a second then an alarm is set otherwise the base line and if the signal from 0, 2V in more than one second and then alarm stays off and vertical offset. I tried different techniques such as the spreading of the signal and deducting his originals, but nothing seems to work I also tried to set a delay time, but all of the channel of the instrument are then delayed even if created in a Subvi. could someone help me please?

Thanks in advance

Frédéric.

Hi Fred,.

I have re-written the buffer circular for you and also written a small code demo showing how to find the max and min and an alarm is that is greater than or equal to a trigger point:

Circular buffer 2, this time I do not turn the buffer but just increment an index and clock this more when the buffer is full.

Here is a small demo vi showing how to raise an alarm if the difference of the maximum and minimum value is equal to or greater, then a trigger point.

With regard to the circular buffer 2 I pulled out the current index value. This is where you need to go through the buffer sometime running during the first to the last command. You can use this value to index as your starting point.

I hope this helps.

RGS,

Lucither

Tags: NI Software

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