Monday, February 2, 2015

Indoor location with one of these....

https://commerce.honeywell.com/webapp/wcs/stores/servlet/eSystemDisplay?catalogId=10251&storeId=10651&categoryId=53411&langId=-1

I learned this from QUIK recent MIG talk


Gyro
Manufacturer Technology Grade Model
Number
Size
(mm x mm x mm)
Bias
Stability
(deg/hr)
InvenSense MEMS Tactical MPU 3000 4 x 4 x 0.9* 36.0
Analog Devices MEMS Tactical ADXRS646 7 x 7 x 3 12.0
Honeywell Ring Laser Nav GG1320AN 88 x 88 x 45 0.0035

Navigation Grade Gyro  10,000x Better Than
MEMS Gyro
Navigation Grade Gyro  5x Volume of iPhone
6 Smartphone
 Just 60 seconds @ 12 deg/hr Bias Stability 
> 20 Yard Error


Interesting stuff. Ring laser and Indoor location could really be accurate.!
Who can make one small enough and cheap enough?


In a ring laser gyroscope, the two counter-rotating beams are channeled to a photo detector. If the vehicle is not rotating, the beams remain in phase. If rotation is occurring, one beam continuously changes phase with respect to the other. A diode translates that moving interference pattern into digital pulses, each pulse representing an angle of rotation (typically .0005 degree per pulse, according to Koper). The rate at which the pulses are produced is also a measure of the rate of rotation.


am blown away by this point
 Navigation Grade Gyro  5x Volume of iPhone
6 Smartphone
just doesn’t seem possible, but its there.


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