Unpaved roads data collections
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Unpaved Roads Data Collections. Richard J. Dobson ( [email protected] ), Colin Brooks, Chris Roussi , Ben Hart, Dave Dean - MTRI. Remote Controlled Helicopter. Bergen Tazer 800 Weight: 5.22kg, 12.75kg loaded Max flight time: 18 minutes Max Payload: 10kg

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Unpaved Roads Data Collections

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Unpaved roads data collections

Unpaved Roads Data Collections

Richard J. Dobson ([email protected]), Colin Brooks, Chris Roussi,

Ben Hart, Dave Dean - MTRI


Remote controlled helicopter

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


Remote controlled helicopter1

Remote Controlled Helicopter


Ground station

Ground Station

  • Set waypoints for helicopter collect

  • Google Earth interface

  • Ability to set the altitude and speed


Ground station1

Ground Station


Ground station2

Ground Station


Uploading waypoints to the helicopter

Uploading Waypoints to the Helicopter


Data collects

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


Unpaved road characteristics

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

      • <1', 1'-2', 2'-3', >3‘ width bins

      • <2”, 2”-4”, >4” depth bins

    • Ruts

      • Detect features >5”, >10' in length, precision +/-2”

    • Corrugations (washboarding)

      • Classify by depth to a precision of +/-1”

      • <1”, 1”-3”, >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”


Site preparation

Site Preparation

  • Road divided into 50 m sections (for test flights)

  • Road was blocked during flights


Distress measurements

Distress Measurements

  • Measurements are taken of all distresses within the segment

    • Potholes

    • Rutting

    • Washboarding

    • Loose aggregate


Remote controlled helicopter demonstration

Remote Controlled Helicopter Demonstration

http://www.youtube.com/watch?v=KBNQzM7xGQo


Piotter rd and garno collect november 8 2012

Piotter Rd. and Garno CollectNovember 8, 2012


Helicopter collect piotter rd

Helicopter CollectPiotter Rd.


Helicopter data piotter rd 25 m altitude

Helicopter Data – Piotter Rd.25 m Altitude


Helicopter collect garno rd

Helicopter Collect Garno Rd.


Helicopter data garno rd 25m altitude

Helicopter Data – Garno Rd.25m Altitude


Resolution from 25m at garno rd

Resolution from 25m at Garno Rd.


Aerial collect

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


Aerial collect piotter

Aerial CollectPiotter


Aerial data piotter rd 500 ft altitude

Aerial Data – Piotter Rd.500 ft Altitude


Aerial collect garno rd

Aerial CollectGarno Rd.


Aerial data garno rd 500 ft altitude

Aerial Data – Garno Rd.500 ft Altitude


2013 collects

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


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