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Similar to Panel: Affordable options for Indoor location and elevation
Similar to Panel: Affordable options for Indoor location and elevation (20)
Panel: Affordable options for Indoor location and elevation
- 1. MEMS sensor based navigation
Steve Wahl
Sales Director North America
June 23, 2010
Bosch Sensortec
1 Confidential | Marketing | 5/25/2010 | © Bosch Sensortec GmbH 2010. All rights reserved, also regarding any disposal, exploitation,
reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
- 2. MEMS sensors for navigation support
Pedestrian navigation cases
GPS reception environments
Good GPS signal Obstructed GPS signal No GPS signal
- Position by GPS - Hybrid GPS & Sensors - Multi-sensor navigation
- Accurate altitude by bar. navigation - Opportunity signals
pressure sensor - Mutual recalibration - Flexible hand-over
Increasing complexity and system cost
Bosch Sensortec
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- 3. MEMS sensors for navigation support
MEMS sensor use cases
Accelerometers for device position & motion detection:
Detect motion patterns like walking, running, sitting, laying down…
Detect “no motion” trigger sleep mode for device power saving
Detect “start of motion” system wake up, alarm, start fix…
Detect device position relative to g-vector – eCompass, mute
device, rotate display, turn off display…
Detect step frequency (of user) and derived stride length thus
provide traveled distance.
Multi use-case per sensor are the key for reducing cost / function
Bosch Sensortec
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- 4. MEMS sensors for navigation support
MEMS sensor use cases
Barometric pressure sensors provide:
Air pressure for altitude deduction (barometric formula & reference)
the most accurate means to achieve this at 0.25 m altitude resolution
Accurate altitude enables indoor navigation by providing floor
level detection.
Accurate altitude signals improves GPS accuracy in obstructed signal
environments.
Barometric pressure sensors are the solution for altitude detection
Bosch Sensortec
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- 5. Header of section
Navigation with pressure sensor
Purposes:
Altitude correction by weak GPS reception (by pressure)
Floor detection is based on altitude measurement (by pressure)
SW based error suppression:
weather drift suppression,
cancellation of pressure fluctuation
Noise filtering
Bosch Sensortec
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reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
- 6. MEMS sensors for navigation support
MEMS sensor use cases
Geomagnetic sensors & gyroscopes:
Geomagnetic sensors provide a heading even if no motion.
This allows for automatic map orientation & direction indication
Gyroscopes provide accurate short term turn information.
This allows for accurate turn angle detection.
Geomagnetic sensors & gyroscopes rely on accelerometer inputs
Bosch Sensortec
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reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
- 7. MEMS sensors for navigation support
Today’s Smartphone capabilities
Accelerometers are already standard in
smart-phones: no additional component cost. Ready for basic
pedestrian
Geomagnetic sensors will reach an adoption application
rate ~ 80% in smart-phones by end of 2010. today !!!
Low cost, high resolution barometric pressure Indoor navigation
sensors are already available today… is feasible…
The lack of comprehensive SW solutions and indoor map availability
are today’s main inhibitors
Bosch Sensortec
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reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
- 8. MEMS sensors for navigation support
Component cost: enabler or inhibitor ?
Accelerometer cost drivers:
Volumes are driving prices down. Strong price erosion experienced
in 2008 & 2009.
Current smart phone accelerometer adoption rate is already
100 % and overall mobile phone adoption rate is expected to
be ~ 45% in 2010 – strongest growth already took place.
What made this steep cost reduction possible ?
2005
Today !!!
5 x 5 mm 4 x 4 mm 3 x 3 mm 2 x 2 mm
Bosch Sensortec
8 Confidential | Marketing | 5/25/2010 | © Bosch Sensortec GmbH 2010. All rights reserved, also regarding any disposal, exploitation,
reproduction, editing, distribution, as well as in the event of applications for industrial property rights.