mit-scan2 – bt mit-scan2-bt acpa webinar presentation€¦ · – side shift (longitudinal...

kesslerdcp.com

KSE Testing Equipment

A Leading Manufacturer & Distributor of Testing Equipment for Soils, Asphalt & Concrete Pavements in Highways & Airfields

MIT-SCAN2-BTMIT-SCAN2 – BT

ACPA Webinar PresentationBY

Garry Aicken, P.E.KESSLER SOILS ENGINEERING PRODUCTS, INC

North American Distributor for MITACPA Member

103/04/14 Copyright © 2014 by Kessler Soils Engineering, Products, Inc. All rights reserved.

kesslerdcp.com



OUTLINE

• How Does It Work• Limitations• Description of the System

– Rail System– Casio Handheld & MagnoNorm Software– MagnoProof 3.3 & 5.0 (Just Released)

• Future Products


kesslerdcp.com



SYSTEM OVERVIEW

The MIT-SCAN2-BT sensor system provides nondestructive testing of dowel bars in plain concrete pavements. Using a rail-gliding measuring carriage, all deviations of bar positions from the specified position can be determined quickly, precisely and cost-effectively.

Concrete covering, translations, deviations, skew and tilt from the prescribed orientation of the dowel and tie bars can be determined within tenths of an inch precision.


kesslerdcp.com



PRINCIPLES OF THE TECHNOLOGY

4

• The device functions according to the principles of pulse-induction. Its transmitter sends a weak, pulsating magnetic signal.

• The magnetic field is harmless to the surrounding area and does not affect the physical properties of the dowels or of the concrete.

• Similarly Concrete properties do not affect the signal or results (i.e. amount of moisture in the concrete).


kesslerdcp.com



PRINCIPLES OF THE TECHNOLOGY

5

• When the magnetic field comes into contact with metallic objects, it induces eddy currents inside of them. The currents cause magnetic response signals and these magnetic signals are then measured by receivers inside the testing device, and evaluated.

• The measured values are recorded every 20 milliseconds. They are collected in large quantities for a mathematical evaluation.


kesslerdcp.com



DOWEL BAR ORIENTATION

ORIENTATION OF BARS & DATA TERMINOLOGY• The direction of the road way is the “y” axis and the direction of the joint is the “x” axis and

the depth is the “z” axis. Clockwise rotation for Skew or Tilt is recorded as a positive number.

6

Horizontal Skew (Misalignment) Longitudinal Translation

(Side Shift)

Plan View:

Cross Section:Pavement Surface

+ “z” Vertical Tilt (Misalignment)

Vertical Translation (Depth Deviation)

Bottom of Pavement

is planned position is actual position03/04/14 Copyright © 2014 by Kessler Soils Engineering, Products, Inc. All rights reserved.

kesslerdcp.com



DOWEL BAR INSTALLATION TOLERANCES

• The following are Dowel Bar Installation Tolerances for achieving the Manufacturer’s Accuracy Tolerances on the next Slide :– Side Shift (Longitudinal Translation) less than 80 mm (3.2 in)– Horizontal Misalignment (Horizontal Skew) less than 40 mm (1.6 in)– Vertical Misalignment (Vertical Skew) less than 40 mm (1.6 in)– Dowel Bar Depths between 110 mm (4.3 in) and 190 mm (7.5 in)– Thin (Tie) Bar (0<=25.4mm/1in) depth between 80 mm (3.2 in) and 160

mm (6.3 in)– Airport Bar Depths between 175 mm (6.9 in) and 255 mm (10.0 in)


kesslerdcp.com



ACCURACY TOLERANCES

ACCURACY TOLERANCES for the MIT-SCAN2-BT:• Tolerances values:

– repeatability 2 mm (0.1 in), – measuring path (x-direction) +/- (3 mm +0.3% of the distance) – bar spacing +/- 4 mm (0.2 in) – horizontal misalignment +/- 4 mm (0.2 in) – side shift +/- 8 mm (0.3 in) – depth (cover) +/- 4 mm (0.2 in) – vertical misalignment +/- 4 mm (0.2 in)


kesslerdcp.com



BASKETS

• The measuring and testing device SCAN2-BT was developed for the determination of dowel and tie bar positions installed with a Dowel Bar Inserter (DBI).

• It can be used for dowel bars in baskets with shipping straps cut.

Uncut Cut


kesslerdcp.com



• Remove any debris, snow or ice covering the surface to be measured.

• Vehicles and Construction Equipment should not be within 6 feet and 11 feet of the measurement device.

• Operators with steel-toe shoes should remain the length of the pulling rope from the device.

• Metal in or under the concrete pavement will influence results. Such as:

– Reinforcing Steel in the Paving– Conduits– Direct Buried Cables– Expansion Joint Frames– Manholes & Inlet Grates

1003/04/14

INFLUENCES ON RESULTS

Copyright © 2014 by Kessler Soils Engineering, Products, Inc. All rights reserved.

kesslerdcp.com



SYSTEM COMPONENTS

Rail System

Scanning Device

CASIO Handhelds

MagnoNorm on CASIO

MagnoProof on PC

IT600 or IT800


kesslerdcp.com



TRANSPORT BOXES

The MIT-SCAN2-BT is transported in two boxes with wheel at one end of each box.

Rails for the Measuring Device Measuring Device


kesslerdcp.com



ASSEMBLING THE RAIL SYSTEM

• The rail system is made out of glass fiber-reinforced plastic.

• Individual segments can be joined to reach a maximum length of 10 meters (32.8 ft), which permits a measurement across multiple lanes in one step.

• Due to the light weight of the rail system and the measuring device, the rails can lie directly upon the concrete surface while measuring curved surfaces including crowns


kesslerdcp.com



ASSEMBLING THE RAIL SYSTEM

• The cross-ties have a center line to be aligned with the joint and wheels at one end for easy movement to another joint when the rails are installed.

• The measuring vehicle is pulled manually by a nonmetallic cord over the rails with a speed between 10 and 20 inches per second.


kesslerdcp.com



MOVING THE RAIL SYSTEM

• Once Assembled, then movement from joint to joint can be done in one piece with the wheels on the cross ties.

• It is recommended that one person per 15 feet of connected rail to raise one side and move to the next joint.


kesslerdcp.com



PHYSICAL LAYOUT

PREPARATION FOR MEASUREMENT• Layout the cross-ties with the wheels on the side for the next joint and connect

the rails with the provided bolts. • Position the cross-tie center line exactly over the joint.• Position the end rail sections orange/white color change at the edge of pavement• Position the rail system so that the measuring device rear wheels are against the

stop pins and check the white line is positioned at the edge of the pavement.

Where white joins orange on the end rail positioned over the right edge of concrete

white line


kesslerdcp.com



CASIO POCKET PC

• The Pocket PC communicates with the measuring device via a Bluetooth connection. The software MagnoNorm, that runs on the Pocket PC, controls the action of the device. The measurement data is automatically recorded, reviewed and analyzed on-site.

Settings: User input for the project


kesslerdcp.com



CASIO IT600 OR IT800

• While the operator moves the measuring device on tracks along the joint, all measurement data is recorded and saved in a hand held POCKET PC (CASIO IT600 or IT800) . After the end of the joint is reached, the exact positions and alignments of the dowel bars regarding the concrete surface and the joint position are computed within seconds.


kesslerdcp.com



CASIO FUNCTIONS

• The Casio serves the following tasks:– Controlling the functions of the

measuring device, – Displaying the input data (highway

number, lane, joint ) and other parameters (bar type),

– Recording and saving the input measured data,

– Displaying a color map for a visual evaluation.


kesslerdcp.com



MAGNONORM SETTINGS

MEASUREMENT OPERATION

1. Enter the settings: a. Dowel Type – select from the list, (mm)b. Highway – input,c. Station No. – input, d. Path – input, e. Plan Offset – input, (mm)f. Plan Spacing - input and, (mm)g. Plan Depth. (mm)

2. Select units (metric or Imperial)


kesslerdcp.com



MAINTENCE & BATTERIES

Daily Checks:• Check Scanner wheels for free movement.• Check Alignment Rub Bars, rotate if necessary to maintain

centering of the Scanner in the rail system• Check Rail System for cracks, tighten locking screws make sure the

rail section ends are flush against each other. Small gaps will hang up the Scanner when pulling over them.

2103/04/14

KSE Service, Repairs or Spare Parts:[email protected] or 703-569-2583

Batteries:• MIT-SCAN2-BT and Pocket PC (Casio) are equipped with separate rechargeable

batteries and with chargers for each of them. Both batteries should be charged using the special connecting cables & cradle.

• The MIT-SCAN2-BT is a Lead-Gel battery. – Operating time is at least 8 hours.– The charging time is about 4 hours.

• The Casio is a Lithium battery– Operating time is at least 8 hours.– The charging time is about 4 hours.

Copyright © 2014 by Kessler Soils Engineering, Products, Inc. All rights reserved.

mailto:[email protected]

kesslerdcp.com



MAGNOPROOF

OVERVIEW• MagnoProof is used for analysis, visualization and

documentation of measurements of the MIT-SCAN2-BT device on a Desktop PC. It is specifically designed for the analysis of measurements the dowel bars compared to the planned positions.

• Reports reflecting the deviations of the actual dowel bar positions from the planned positions can be created and printed with the software MagnoProof. This post processing application permits the rapid analysis of large quantities of measurements.

• Current Software Version in use is MagnoProof 3.3 with a totally new version MagnoProof 5 just released


kesslerdcp.com



MOVING FILES

• The measuring files can be moved in one of the following ways:– When the Casio is in it’s cradle is connected to the PC with the provided

wiring, an icon with the description Mobile Device appears My Computer folder.

– Files can be copied or moved using the Window-Explorer.– Files can be moved with MagnoProof 5

• Open MagnoProof 3.3 to pull individual files for Analysis:


kesslerdcp.com



PROJECT SETTINGS - MAGNOPROOF Version 3.3


kesslerdcp.com



BATCH PROCESSING - CALCULATIONBatch processing (A) – Option to Calculatethe data for multiple measurement files at the same time. The window is populated after the files are selected for analysis. The results are saved and displayed in a single Excel file.

Calibration files can be changed prior to Batch Processing

BATCH PROCESSING - MAGNOPROOF Version 3.3


kesslerdcp.com



• Shows Tabular Results & Map Preview

Page 1 of 2

AFTER CALCULATION - MAGNOPROOF Version 3.3


kesslerdcp.com



VIEWING SIGNAL CURVES- MAGNOPROOF Version 3.3

Signal Curves are critical to identifying influences/interferences then evaluating what is the cause. Once the cause is known then the user can insert or delete a bar that will reduce the influence on adjacent bars results.


kesslerdcp.com



GRAPHICAL OUTPUT - MAGNOPROOF Version 3.3

xs zs dy sh sv 2803/04/14 Copyright © 2014 by Kessler Soils Engineering, Products, Inc. All rights reserved.

kesslerdcp.com



EXAMPLE OF THE DATA REPORT

EXCEL DATA REPORT- MAGNOPROOF Version 3.3


kesslerdcp.com



NEW - MAGNOPROOF 5.0

Just Released in January 2014


kesslerdcp.com



MAGNOPROOF 5 OVERVIEW

• Easier Data Transfer– Function performed within

MagnoProof no longer need to work within Windows Mobile Device to move files

• Improved Data Analysis Tool– Improves identification of influenced

areas and suggest possible causes

• Better Presentation of Results– Graphics & Report Table are shown

in the same window

Page 1 of 2 03/04/14 Copyright © 2014 by Kessler Soils Engineering, Products, Inc. All rights reserved.

kesslerdcp.com



MAGNOPROOF 5.0 BROWSE SCREEN

32

Test Data Foldersto Data Transfer In

Work Folder &Output Transfer

Tests Files Available to Analyze

Signal Strength, Parameter Editing, & Batch Processing with Status Line

Program Settings:Project Specifications:DepthSide ShiftMisalignment

Unit of Measure:International (Metric)Imperial (English)


kesslerdcp.com



IMPORTING DATA FROM CASIO

• Only works with files named “.hdfx”. Old “.hdf” files will not work with MagnoProof 5.0

• Only MagnoNorm 5.0 produces “.hdfx” files

• User selects:– Smart Device (Casio)

• Red for not Connected• Green for Connected

– Memory Card/Local Folder


kesslerdcp.com



TEST DATA FILES

• Individual Test File Results including Stationing & Joint Number Information

• Can Select Test Result Files for Batch Processing

34

Batch Processing Status Information is shown in this box


kesslerdcp.com



VISUALIZATION SCREEN MAP & TABLE

35

• Visualization Screen:– Signal Chart– Intensity Map

– Modeled vs. Measured Signal– Tabular Results– Project Information


kesslerdcp.com



OUTPUT SCREEN OVERVIEW

36

• Combines the Map, Bar Validation & Results Table• Includes an Interference Identification Code


kesslerdcp.com



AUTOMATIC INTERFERENCE INDICATORS

37

• Program Generated Potential Interference Indication

• Needs to be Reviewed• Shows in the Comment

Column


kesslerdcp.com



OUTPUT SCREEN HEADERS


kesslerdcp.com



BATCH PROCESSING RESULTS

39

Vertical Misalignment Results by Bar

Horizontal Misalignment Results by Bar

Side Shift Results by BarTotal Misalignment Results by Bar(Combination of Horizontal & Vertical Misalignments)

Depth Results by Bar

Average Depth Results by Bar as a X-Section(Shows each bar, plan elevation, & average depth )


kesslerdcp.com



Disturbing objects: Tiebars

Disturbing objects: Metal objects close to surface

40

INTERFERENCE EXAMPLES


kesslerdcp.com



Disturbing objects: Neighbor bar with strong horizontal misalignment

Disturbing objects: Several small metal objects

41



kesslerdcp.com



Missing signal information: Deep dowel between higher dowels

Missing signal information: Deep dowel positions and small dowel spacing

sufficientnot sufficient

42



kesslerdcp.com



Missing signal information : Low signal in two sensors for extreme side shift

Background signal: superstructures over exisiting reinforcement

43



kesslerdcp.com



Interference leads to deviation between measuring signal and modelled signal

Deviation in the standard case Deviation, when having interferingbackground signal

Signal analysis offers means to detect interferences

44

SIGNAL ANALYSIS BENEFIT


kesslerdcp.com



Influencingfactor

Influence on themeasuring result

Influenceobservalbe

Possibility to give reliable results

Local Object Big Yes Usually No Indication of Results are Possible

Missing Signal Information

Varying Yes Results Less Reliable

Extreme Misalignment

Increases with Increasing Misalignment

Yes Statements about the Extreme Misalignment Still Possible

Background Signal

Big Yes Compensation of Influence Possible for Constant Interference

Influence of Neighboring Bar

Usually Small Yes Results Less Reliable

45

SUMMARY OF INFLUENCES


kesslerdcp.com



FUTURE PRODUCTS

• New Scanning Device without rails.Called “DowelScan”

• MagnoProof 5 Software Module for Basket Analysis

• New SCAN – T3 for concrete pavement thickness • “Joint Finder” for center lines & bar depths• Contact Information:

[email protected] or571-291-2284 x103


mailto:[email protected]

mit-scan2 – bt mit-scan2-bt acpa webinar presentation€¦ · – side shift (longitudinal...

Documents