| Summary: | 碩士 === 國立成功大學 === 電機工程學系碩博士班 === 96 === Sudden infant death syndrome (SIDS) is the most common death reason of infants statistically, about 2 to 3 of every thousand newborns die, and apnea is a main reason for infant death. This thesis is to design an infant-respiration detector, when the instrument stop breathing, the designed instrument will alarm. Most commercially available respiration detectors are to sense the infant movements, and the sensor may be in contact with the body. In this coork, piezo-resistive sensor is adopted and the detector is contacts.
A micro electro mechanical systems(MEMS) piezo-resistive sensor is used. In fact, piezo-resistive sensor is generally used to sense pressure, but it also can be used to detect air flow. From our experimental data, the sensor has a very linear relation ship with flow rate. The signal pressing circuit is made by a few commercially available ICs, In the future, the whole circuit can be integrated into a single chip to reduce cost and size.
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