2012 PURDUE ROAD SCHOOL
Transcript of 2012 PURDUE ROAD SCHOOL
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JW Stanger, P.E.
Rieth-Riley Construction Co., Inc.
2012 PURDUE ROAD SCHOOL
Session 56
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•GPS Components –Base Stations
–3D-GPS – Rover Pack
–3D-GPS – Machine Control
–3D-millimeter GPS
–Truck Mounted GPS
•Using GPS Data –Quantity Documentation
–Change of Work Verification
–Utility Conflict Resolution
–Complete Project As-Built
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•Base Stations
•3D-GPS – Rover Pack
•3D-GPS – Machine Control
•3D-millimeter GPS
•Truck Mounted GPS
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•Purpose of the Base Station
•Placement of the Base Station
•InCORS Network
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Even though GPS receivers have the ability to calculate a position every second (some even faster). Given what the signals have to travel through and the precision of the clock used to calculate a solution, those positions could vary as much as 30 feet.
Purpose of the Base Station
Problem…
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The Base receiver is told to assume one calculated position to be the “true” position. From there it can determine the relationship between the “true” position and every other calculated position. It then passes this relationship to the Rover and the Rover then corrects itself.
Purpose of the Base Station
RADIO
Base
Rover Now all of the Rover’s positions are highly precise relative to the Base’s “true” position
How do we correct this tolerance?
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Placement of the Base Station
Keep it Simple:
• Easy to get to for simple daily setup
• Non-production area to minimize relocation
Keep it Safe:
• Safe from theft
• Away from roads and easy access locations
• Near people, equipment yard, jobsite office, etc.
• Safe from getting hit by machinery & vehicles
Keep it Stable:
•The mounting platform must be stable
• Keep clear of equipment, parking areas, and work areas where it
might get bumped or subject to vibration.
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Placement of the Base Station
Tripod Permanent
Pole
Permanent
Building
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Placement of the Base Station
Primary factors
determining the best
location for the Base
Station 1. GPS Friendly Location
2. Radio Friendly Location
3. Simple, Safe, Stable Location
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• Network of 45 geodetic quality GPS (GNSS) receivers and antennas, permanently installed, located across the state – INDOT & ISP sites
• Continuously collects GPS data
• Transmits through internet to central servers
• Data archived for future use, available for download by users
• Data processed by server software to generate network corrections – available via internet in real-time
• The InCORS Network takes the place of needing a Base Station setup on a project
InCORS Network (Indiana Continuously Operating Reference Station Network)
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•Components
•GPS Receiver
•Data Collector
•Capabilities
•Cut and fill information
•Layout items
•Measure and record points
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Rover Pack - Components GPS Receiver
•Communicates
with satellites
•Receives data from
base station
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Rover Pack - Components Data Collector
•Communicates with the
GPS Receiver via
Bluetooth
•Touch screen interface
•Contains all project data
•Surface Models
•Linework Files
•Alignment Lines
•Control Points
•Data Points
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The individual Data files are contained in a Project File • Multiple Project files can be stored in the controller.
Rover Pack - Components Data Collector
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•A CAD Surface Model is created and imported into the Data
Collector
•This Surface Model is the surface with which the existing
grade is related to, providing the cut and fill numbers
Rover Pack - Components Data Collector
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Managing Layers
• Layers can be created (New), edited, or
deleted
• Layers can be selected to be ON or OFF
Layer is ON
• Linework/Points will be displayed on the
working screen.
• Linework or Points will be displayed when
Linework/Points Listing is selected.
Layer is OFF
Rover Pack - Components Data Collector
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Rover Pack - Capabilities Cut and Fill
See continuous Cut/Fill and Elevations anywhere on the
project
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Rover Pack - Capabilities Cut and Fill
• Ability to check grade anywhere on the project, at any time
• Eliminates the need to set lathe for INDOT to pull stringline to check grade
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Rover Pack - Capabilities Layout Items
Lines and points can be manually placed into the data
collector or imported directly from an AutoCAD drawing.
• Alignment Lines
• Construction Phase Lines
• Permanent ROW
• Construction ROW
• Radius Locations
• Temp Widening Limits
• Striping/Stop Bar
Locations
• Temp Striping Lines
• Signal Post Locations
• Extents of Sheeting
• Pavement Removal
• Box Culvert Layout
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Rover Pack - Capabilities Measure and Record Points
Points, lines and curves can be recorded by placing the
rover over the point and pushing the measure button. This
supplies both a location as well as an elevation of the point.
•Volume of Common Excavation
•Measure Stockpile Volumes
•Complete Project As-Builts
•Calculate Quantities
•Provide Quantity Documentation
•Change of Work Quantities
•Utility Locations
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Components
•GPS Base
•GPS Rover
Capabilities
•Layout
•Grade Checking
•Collect Points
•Quantities
•Stake Tool
Offers control over every
single square inch of your job!
3D-GPS – Rover Pack Summary
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•Overview
•Components
•Benefits
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Machine Control - Overview •Placed on several different types of machines
•Graders
•Dozers
•Excavators
•Concrete and Asphalt Pavers
•Milling Machines
•Sensors are installed on the machinery and
are infused with the valves
•The automated process then controls the
blades and moves them according to the
proposed surface model grades
•Uses the same Control, Surface and Linework
files as the Rover Pack
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3D-MC uses System Five’s Cross
Slope Components
Main Slope Sensor
Rotation Sensor
Blade Slope Sensor
Machine Control - Components
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Machine Control - Components
Blade
Slope
Sensor
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Machine Control - Components
Rotation
Sensor
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Machine Control - Components
Main Fall
Sensor
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GPS Antenna
Radio Antenna
GPS Receiver & Radio
3D-MC Control Box
Machine Control - Components
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Machine Control - Components
•Radio Antenna •Communicates with the Base Station
•GPS Antenna •Collects signals from the satellites
•GPS Receiver and Radio •The “heart” of the 3D GPS System
•Contains GPS receivers, radios, and controllers
•3D-MC Control Box •Provides the operator with real-time grade
information and control
•Similar to the Rover Pack Data Collector as it
contains the files for the system
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Machine Control - Components
Control Box sample screen shots
(Plan View)
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Machine Control - Components
Control Box sample screen shots
(Profile View)
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Machine Control - Components
Control Box sample screen shots
(3D View)
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Machine Control - Benefits
•Significantly increase grading productivity
•Reduce staking on jobsite almost entirely
•Control materials
•Keep up with fast paced construction
schedules
•All jobs becoming easier to grade
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•Overview
•Components
•Benefits
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3D-millimeter GPS - Overview
•Combines the advantages of laser (multi-user
and high vertical accuracy) with GPS (multi-
user and 3D) into one versatile and easy to
use system
•Large working range: up to 8000’ horizontal
and 120’ vertical
•Works with existing GPS systems
•Control multiple machines and rovers at the
same time
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3D-millimeter GPS - Overview
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15’
15’
±33’
1000’
mmGPS Vertical Working Window
3D-millimeter GPS - Overview
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Operate up to 4 PZL-1 Transmitters at
the same time for a total working range
of 8000’.
3D-millimeter GPS - Overview
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Each PZL-1 = 30’
Operate up to 4 PZL-
1 Transmitters at the
same time for a total
working height of
120’.
3D-millimeter GPS - Overview
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PZL-1 Transmitter
• Tripod (2 meter fixed height tripod)
• Calibration download cable
PZS-1 Sensor
• Cable to connect PZS-1 to GPS receiver - Rover
PZS-MC GPS+ Receiver
• mm receiver w/ built in GPS antenna - Grader
3D-millimeter GPS - Components
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PZL-1 Transmitter
• Setup on a Control Point with a known height (2 meters)
• The Rover Receiver sends the GPS info through the mmGPS Sensor to the Transmitter
• The Transmitter corrects the data and transmits it back to the sensor with laser accuracy
3D-millimeter GPS - Components
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PZS-1 Sensor
• Receives & Decodes the Laser Zone Signal
• Works with up to 4 PZL-1s
3D-millimeter GPS - Components
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PZS-MC
• Receives & Decodes the Laser Zone
Signal
• 360o beam Detection
• Portable – easy to move between machines
• GPS works without PZL-1 transmitter
3D-millimeter GPS - Components
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3D-millimeter GPS - Components
PZS-MC
Machine
Sensor
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3D-millimeter GPS - Benefits
•Up to 300% more accurate than standard GPS
•Increased Productivity – fewer passes to
reach final grade
•Grade to tighter tolerances and eliminate
high-cost material overruns
•Finish grade even with minimal satellite
coverage
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•Expedient •Collect current, up-to-date location information
•Efficient •Collect data at normal roadway speeds
•Collect complete information in one pass
•Eliminate return trips to the field
•Safe •Map from the security of a vehicle
•Used by INDOT, designers, and contractors
to record existing project data.
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•Quantity Documentation
•Change of Work Verification
•Complete Project As-Builts
•Utility Conflict Resolution
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Quantity Documentation
•With Rover Pack, measure the extents of
each pay item on the project
•Use different layers for each item
•Can use points, lines and polylines
•Calculate the area or length using either the
data collector software or a CAD program
•Print drawing of the areas of each pay item
for records
•Print out the length or area calculation page
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Quantity Documentation
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Quantity Documentation
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Change of Work Verification
•With Rover Pack, shoot location and
elevations of items with any change in work
•Soft Unsuitable Subgrade
•Volume of undercut
•Removal items
•Temporary pavements
•Especially important when the items will be
covered up and not able to be quantified later.
•Will be able to print out a drawing showing
actual quantities.
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Complete Project As-Builts
•Use the same shots taken for the Quantity
Documentation
•Will then have accurate locations of all items
on project.
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Complete Project As-Builts
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Complete Project As-Builts
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Utility Conflict Resolution
•As the underground line has been uncovered,
can shoot the location and elevation of said
line.
•Can then simply email the CAD file of actual
locations to INDOT/Engineers to be able to
quickly create a resolution to the conflict.
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