07-03-2012, 02:22 PM
Design of Health Technologies
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Basic Health - Temperature sensors
Simplest form of sensor. Quite a few of these on the market, several have PC interfaces.
Electronic versions use small thermal sensing elements – fast
response.
Blood Pressure Monitors
The most accurate versions are arm cuff models.
There are also finger, or wrist-style models. But location relative to heart height is critical. Latest wrist models include smart sensing to position at the correct height.
Pulse oximetry
Pulse oximetry. A light source/sensor on a finger senses light transmission at 650nm and 805nm.
These wavelengths are absorbed selectively by oxygenated and non-oxygenated blood.
An oximeter signal varies at pulse rate.
Exercise pedometers
Accelerometer-based sensors detect leg motion. Sensor typically mounted in the shoe or at the waist.
