Help with signal pulse generation in Simulink

Hi, I have a filtered ECG signal which is exhibiting filtered/enhanced R wave peaks. The sampling frequency is 100 Hz, i.e. a sample every 0.01 second. Now all I want with my model is to generate a pulse (amplitude could be unit) every time a peak is peak is detected. Further I want to generate separate signal pulses after a time delay, say 50 mSec, from the first one.

Please see the attached images from the scope. First one shows filtered, but non threshold-ed output, hence some noise at low amplitude level. Second one shows threshold-ed output to eliminate that noise. Third is a snapshot of my model.

A side note, this signal generation has to be real time, i.e. as the peak is getting detected. Any help will be greatly appreciated.

Thank you.

Answer 1

[A Jenkins]

You should be able to build something out of the following blocks:

Detect Change

Compare to Constant

Transport Delay

[Sameer]

Thanks for your suggestion. While I understand the usage of transport delay to induce a time difference, I don't understand how you can use Detect Change and Compare to Constant building blocks to detect peaks. Mind you the peak amplitudes are not constant.