Wake up baby, for avoiding sudden infant death syndrome

Hi! I’m a industrial design student, of course my knowledges in electronics are remotes, i just have a basic knowledge about arduinos an lily pad, well I have this project for avoiding sudden infant death syndrome, i need a sensor that counts 40 breaths in a minute, that obviusly causes a movement of the toraxic zone on the baby, so i think i can monitorate this 40 movements in a minute, a very small baby because it’s for prematures, and with this rythim of breathing get low, after 15 seconds, activates an alarm, so i was looking but is kinda difficult to me because my poor knowledges and also my english it’s not so good, but i found this products, that maybe i think i can use, i’m gonna need besides the sensor of movement an audible alarm that it’s connected to the sensor. I found this pulse sensor https://www.sparkfun.com/products/11574 and i noticed that it haves a led that it’s monitoring the heartbeats per minute right?. Then i found this https://www.sparkfun.com/products/8630 but i don’t understand if it works for make things move, or if the alarm could be programated when the baby, stops to move, or this one that it’s a pressure sensor https://www.sparkfun.com/products/9376, besides if someone speaks spanish it could be easier for me to understand and explain my project. Thanks.

PPIpaw:
I found this pulse sensor https://www.sparkfun.com/products/11574 and i noticed that it haves a led that it’s monitoring the heartbeats per minute right?. Then i found this https://www.sparkfun.com/products/8630 but i don’t understand if it works for make things move, or if the alarm could be programated when the baby, stops to move, or this one that it’s a pressure sensor https://www.sparkfun.com/products/9376, besides if someone speaks spanish it could be easier for me to understand and explain my project. Thanks.

I don't see how the PIR sensor will be of use. It detects the sudden presence of heat in it's field of view. Since the baby will always be in the FOV, I don't think it will reliably detect any motion. Certainly not any breathing motion.

The pressure sensor might be of use but how are you expecting to use it ?

The primary question is what are you trying to detect ? If it’s breathing, how ? By the motion of air ? By the chest expansion/compression/movement ? By the electrical activity of the diaphragm muscle ? How is it done in hospitals ?

wireless blood oxygen sensor that baby can’t dislodge?