Dividing incoming train of pulse signals into individual pulse signals

Hello,
I am acquiring the pulse signals using DAQ with sample rate of 500Hz.In the attached image the first signal corresponds to 1 second duration samples of pulse signal and second with 10 second duration collected using collector.Now I want to divide and save this incoming pulse signal as periods such that each period contains a pulse signals.The main problem is that the each incoming samples of 1 sec duration doesn't actually contain a single pulse but sometimes contains the two half's corresponding to two different pusle signals.
Can I know how to divide this incoming samples so that I can save the last four pulse signals in four periods so that they can be used to average the current pusle signal to make it better if it doesn't have the same shape or very different amplitude to the previuos one's.
Attachments:
Incoming_signal.PNG ‏181 KB

I want to divide the signal into periods such that it contains sample values(amplitude) from the satrting index of a pulse to the next index of another pulse as shown in the attached image.
Attachments:
pusle_division.PNG ‏85 KB

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Dividing incoming train of pulse signals into individual pulse signals

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