boolean arrays

[Benji..]

Boolean arrays..

Is there anybody that can help me to find a way to count how many times each boolean element in an array is high..

Here is what I want to do: 

The Boolean array read about 40 pir detectors. Each element in the array control lights, and I also need it to work as an alarm system. Many detectors can be active/high in the same time,

it only depends on how much movement there is in the area.

I want to count each element in the array, and when one of them reach a limit.. lets say “3”

the buffer(or memory) will reset all values to zero.

I have searched in this forum for a long time, but I can’t find any solution..

Is there anybody that have an idea, and can help me?? I use LV8.0

Very best regards

Benjii

[Halemani]

Here is the VI which resets each element of the shift register. It can be changed to array too. You wanted whole array to be reset?
Then put a FOR loop in that case and reset whole array.

[daveTW]

Hello Benji,
this Vi determines, if the number of trues exceed a given count. there are sketched two ways.
greets, Dave




Message Edited by daveTW on 04-28-2008 12:16 PM

[MikeS81]

Hi Benji,

here is another example for you. I understand it in this way. Hope it helps.

Mike

Message Edited by MikeS81 on 04-28-2008 12:24 PM

[Benji..]

Hi, and thank's for your fast reply..

Either I didn't explain clearly, or you have missunderstood me.. I have tried many solutions before, but I haven't been lucky to solve this yet... Your exemple wotks fine, but I need to explain to you how I want it to work..

Let's say that one pir detector(element in array) is high for about 500ms, and then goes low again..  Next time the same detector goes high, it will count 2 (for this specific element).. the next time.. 3 etc.. And in the mean time the same could happen to other elements in the array. When one of the array element  reach the counting level 3, an alarm will be active..  and all counters for the arrays, or memory will be reseted.

Thanks again.. regards Benjii

[MikeS81]

Hi Benji,

did you see this post http://forums.ni.com/ni/board/message?board.id=170&view=by_date_ascending&message.id=319421#M319421 

Mike

[Benji..]

Hi Mike...  and thank's for your answer and example..

It didn't work in the way I wanted it to be, but if you read my second explanation, maybe you can help me.. In the mean time.. thanks..

regards from Benjii

[Halemani]

Sorry for this. Damn, no delete post here

Message Edited by Halemani on 04-28-2008 06:22 AM

Message Edited by Halemani on 04-28-2008 06:24 AM

[Halemani]

Hi, this should help you.
The while loop takes in the boolean values and the case structures deal with the  resetting the array.
If you want delay just put in the proper loop! 

[ThomasV]

Best way to count how many elements of a boolean array are true :

[boolean array] --------[Boolean to (0,1)-function]-------------[Add array elements-function]

(change boolean to zero's and one's, and calculate the total sum of all values)

Thomas.

Message Edited by ThomasV on 04-28-2008 06:40 AM

Message Edited by ThomasV on 04-28-2008 06:46 AM