Help choosing a sensor

rikstick

Hi,
I'm in need of a sensor that will detect when an infant moves around in a stroller or other similar device. If the baby is asleep then the sensor should not be activated, but if the baby moves or squirms around then the sensor should detect this movement.

Any suggestions as to what type of sensor I should use in conjunction with a stamp would be greatly appreciated. I was looking at the Flexiforce sensor, but I'm not sure if that would serve my purpose.

Thanks

Franklin

Depending on the amount of movement a pir might work. You could also use an accelerometer.

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- Stephen

Sandgroper

I agree, a PIR could work. It would be better for stationary purposes though, e.g. in the nursery.

You'd have to filter out any background movement to prevent false triggering. You'd also need to filter out the normal movements that infants make while sleeping. Perhaps you could monitor the number of times that the sensor is activated within a given time frame.

From a practical view point, the sensor could only tell you how active or inactive the baby is. It couldn't tell you whether or not the baby is safe. I know I'm preaching to the converted, but obviously nothing beats close parental supervision.

That said, it would be reasonable to assume that a high degree of activity indicates that the child is awake and possibly in need of attention. Also, any activity when you're not expecting it would be worth knowing about!

If you're thinking about using a PIR you might want to consider a camcorder. Many camcorders have bult in motion sensors, Think of the possibilities...

PIR's aren't the only sensors you could use. A simple vibration detector would work, especially when attached to a stationary stroller. A PING sensor could be useful too. Changes in measured distance indicate movement.

Hmmm, come to think of it, a MOISTURE DETECTOR would definitely come in handy!!!!

SY

I don't know if you are trying to create this from scratch but there are products out there that do just that.
Depending on your budget you might want to purchase one of these, hack them and read the output with the basic stamp.
If you are interested check out AngleCare. They have a great product that senses the shallowest breath.