08-16-2017, 09:15 PM
Design of Health Technologies
[attachment=18066]
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.