Why is Industrial Design Important for Wrist-Based Wearables?

Challenges One of the big issues facing a PPG sensor is that, during active body motion like running, the sensor also senses the motion-related blood volume change in the wrist as the wrist-worn watch presses the skin and deforms the blood vessel under the skin. [...]the PPG sensor senses the reflec...

Full description

Saved in:
Bibliographic Details
Published in:Machine Design 2019-09
Main Author: Koh, Steve
Format: Article
Language:English
Subjects:
Accelerometers
Algorithms
Blood
Blood vessels
Blood volume
Design
Design engineering
Glass
Heart rate
Industrial design
Light
Luminous intensity
Noise
Reading
Scratch resistance
Sensors
Skin
Wrist
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Challenges One of the big issues facing a PPG sensor is that, during active body motion like running, the sensor also senses the motion-related blood volume change in the wrist as the wrist-worn watch presses the skin and deforms the blood vessel under the skin. [...]the PPG sensor senses the reflected light-intensity change in the blood-volume change as it stems from motion as well as from cardiac origins. Watch users tend to like scratch-resistant watch faces, yet the manufacturer’s preference for scratch-resistant glass often exacerbates this very rocking motion because the heavier glass moves on top of all the other watch components. [...]the industrial designer and component designer need to work together to avoid this top-heavy weight distribution. Furthermore, frequency-domain computation is too costly in a power-stingy wearable platform. [...]it’s essential to find a compromise that will minimize motion-related artifacts.
ISSN:0024-9114
1944-9577