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The FKS-111 air pressure sensor can detect very small changes which are
barely discernable to conventional sensors. One such application is to use it to
measure air pressure changes in an air mat or mattress in response to a sleeping persons motions. Changes as small as those caused by heartbeats may be
detected, but a more practical use may be to monitor respiration and sleeping disorders.
Possibilities:
 | Monitor babies crib for problems |
| Detect onset of sleep apnea |
| Detect patient leaving the air mat
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| The air mat is coupled via a tube to a closed chamber
housing the sensor. The electrical signals from the sensor are band-pass
filtered and passed to a signal processor.
The signal processor can be designed to recognize characteristics in
the signal waveform that define the activity being monitored |
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| The waveform shows activity on the air mat starting with no
person being present followed by states of mounting, laying face up,
rolling over and laying face down.
These basic characteristics could be refined to suit the intended
purpose. |
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FUJI &
CO.(Piezo Science)
