Transcript
- Slide 1
- www.mtri.org Richard J. Dobson ([email protected]), Colin Brooks, Chris Roussi,[email protected] Ben Hart, Dave Dean - MTRI Unpaved Roads Data Collections
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- Remote Controlled Helicopter Bergen Tazer 800 Weight: 5.22kg, 12.75kg loaded Max flight time: 18 minutes Max Payload: 10kg GPS IMU: Full autopilot system with the capability of flying preprogrammed waypoints
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- Remote Controlled Helicopter
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- Ground Station Set waypoints for helicopter collect Google Earth interface Ability to set the altitude and speed
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- Ground Station
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- Slide 7
- Uploading Waypoints to the Helicopter
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- Data Collects Total flight time: 16 minutes (not including a 2 minute reserve) Flight time for a 200 m section: 4 minutes During collects helicopter is flown at 2 m/s and at an altitude of 25 m and 30 m (below 100), rural areas only Camera Used: Nikon D800 36.3 MP resolution 55 mm prime lens 8
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- Unpaved Road Characteristics Unpaved roads have common characteristics Cross Section (Loss of Crown) Facilitates drainage, typically 2% - 4% (up to 6%) vertical change Sloping away from the centerline to the edge Measure the profile every 10' along the road direction Able to detect a 1% change across a 9'-wide lane Potholes 3 width bins 4 depth bins Ruts Detect features >5, >10' in length, precision +/-2 Corrugations (washboarding) Classify by depth to a precision of +/-1 3 Report total area of the reporting segment affected Roadside Drainage System should be able to measure ditch bottom Relative to road surface within +/-2, if >6 Detect the presence of water, elevation +/-2, width +/-4 Float aggregate (berms) Surface type Surface width Collected every 10', with a precision of +/- 4
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- Site Preparation Road divided into 50 m sections (for test flights) Road was blocked during flights
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- Distress Measurements Measurements are taken of all distresses within the segment Potholes Rutting Washboarding Loose aggregate
- Slide 12
- Remote Controlled Helicopter Demonstration http://www.youtube.com/watch?v=KBNQzM7xGQo
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- Piotter Rd. and Garno Collect November 8, 2012
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- Helicopter Collect Piotter Rd.
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- Helicopter Data Piotter Rd. 25 m Altitude
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- Helicopter Collect Garno Rd.
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- Helicopter Data Garno Rd. 25m Altitude
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- Resolution from 25m at Garno Rd.
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- Aerial Collect Aircraft: Cessna 172 Average air speed: 65 Knots (~75 mph) Altitudes flown: 500 and 1000 feet Nikon D800 with 105 mm prime lens
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- Aerial Collect Piotter
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- Aerial Data Piotter Rd. 500 ft Altitude
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- Aerial Collect Garno Rd.
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- Aerial Data Garno Rd. 500 ft Altitude
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- 2013 Collects Planned addition of Bergen Hexacopter Compare & contrast capabilities of single-rotor helicopter vs. multi-rotor helicopter Fly rural unpaved roads with variety of distresses New aerial collect with 200 mm lens Camera will be mounted to the door of a Cessna 152 - nadir Working with John Sullivan of Aerial Associates Photography, Inc., as recommended by President of Professional Aerial Photographers Association Chuck Boyle 2013 collection details will be documented in Deliverable 7-A Field Deployment Plans report, due 5/30/2013