Body Fat Monitor Body Impedance Measuring Roger TSAI Apr 25, 2007.
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Transcript of Body Fat Monitor Body Impedance Measuring Roger TSAI Apr 25, 2007.
Body Fat MonitorBody Impedance Measuring
Roger TSAI
Apr 25, 2007
Something about Roger (his friend)
Before After
Why Measuring Body Fat?
• Same weight as Michael Jordan? How’bout body fat?– Height 6 ft 6 in (1.98 m)
– Weight 216 lb (98 kg)
• Health Indicator– Prevent from blood related disease
Product Information• Manufacturer: Tanita
• Price: $30
• Function: – Measuring weight
– Measuring body fat
– Two user memory set
– Unit: Lb or kg
How to use it (1)Setting:
How to use it (2)• Switch on and get on !
– (take off your sox first)
Health Standard
Male
Female
How it works electrically
• Theory of BIA (Bioelectrical Impedance Analysis)
– Shots an electron into one side or your body and receive it from the other
side
– Fat generate more resistance(impedance) than muscle do
– BIA: Calculate fat percentage of your body by data of your gender, age,
height, and weight.
What it senses(1)
• Weight – Use balance bridge, malleable metal,
and flex sensor to calculate your weight
What it senses(1)
• Comparing with other weight scale– http://www.howstuffworks.com/inside-scale.htm
What it senses(2)• Impedance
– Shooting electron from left side of food pad, and receive electron from right side.– Measure voltage difference to between two sides.
Data Sheet
• Not much info on data sheet
PCBLED monitor
Connect toUnit switch
Speaker
Connect topower
Connect toFoot pad
Connect to flex sensor
Up Memory DownButtons:
Wiring
Micro controller
NEC SGP (for LCD)
BU4052BCF Dual 4-channel analog multiplexer
Data Value
• Voltage
Availability
• Availability:
– Domestic merchandise, e.g. Bed, Bath, and Beyond
– Pharmacy, e.g. Duane Read
– Internet, e.g. eBay
• Cost:– Price Range: $30~$100
• Industry links:– http://www.tanita.com/
What’s Next
• Advance version of body fat monitor
• Further application