INFRARED & VISIBLE BRIDGE SCOPING
INFRARED (IR) BRIDGE SCOPING BridgeGuard速 is a revolutionary scoping tool that uses IR sensors to identify and locate delaminations in bridge decks and substructures. BridgeGuard provides initial bridge scanning and scoping to identify decks or substructures that need further investigation. Deck scanning can be executed at highway speeds, up to 50 mph, allowing commerce to maintain a continuous flow and eliminating road user costs associated with delays or stoppages. Commerce can continue at a steady pace, and all inspection personnel are kept safe within the vehicle.
BridgeGuard links precision satellite GPS data with an IR scan of the bridge deck. Locating Hidden Delaminations BridgeGuard uses an infrared (IR) imaging sensor, precise GPS tracking and sophisticated proprietary analysis software to identify the thermal indicators of a delamination. Delaminations interrupt the conduction of heat through the concrete that occurs as temperatures rise and fall during a normal daily cycle. During periods of significant heat flow, delaminations become â€œvisibleâ€? to the on-board sensors. BridgeGuard was developed by engineers and thermographers who specialize in the infrared detection of hidden objects. Their experience includes military, environmental, security, medical, and machine vision applications.
Safe & Cost Effective With the BridgeGuard System, inspection personnel are not exposed to the dangers of working on foot next to active traffic lanes. Bridgeguard is able to eliminate the Road User Costs (RUC) associated with lane closures and/or detours required of typical sounding methods.
HIGH-DEFINITION CRACK SURVEY
IR & VISIBLE BRIDGE DECK SCANNING Project Approach For each project, BridgeGuard will begin with a thorough field evaluation of all the bridges while following project management best practices and procedures. This information will allow BridgeGuard to perform within the parameters of the established project scope of the infrared survey, timeline, and budget to prioritize the condition and needs of the structures in accordance with current AASHTO guidelines.
Eliminate Lane Closures BridgeGuard scans one bridge lane per pass. To optimize the vehicle pathway, it allows for planning a bridge corridor path or series across multiple bridges and bridge lanes to cover maximum bridge area in minimal time.
The high-definition visible band imagery will be used to identify cracks in the bridge decks. Analysis and reporting of the cracks will consist of a description using the AASHTO Condition States (CS) as described below. The standard BridgeGuard crack analysis and reporting will contain those cracks that fall into the CS3 category. For additional information regarding CS1/CS2 categories contact your BridgeGuard sales and support team. Crack data will be presented as a layer on the same MicroStation or AutoCAD drawing as the delamination, spall, and patch data and will have the proper number, location, and size.
AASHTO CONDITION STATES • CS1/CS2 (<0.125”): A trace of the crack, orientation, density; considered “less than severe.” Indicate map cracking. • CS3 (>0.125”): A trace of the crack, orientation, width, density; considered “severe.” Indicate map cracking.
Data Collection & Survey While collecting infrared data of the entire clear roadway of the bridge decks with a vehicle-mounted camera system, BridgeGuard will emerge with two products. The first is an infrared data capture that will identify areas of delamination, patches, and visible spalling. The second involves high-definition visible band imagery to capture deck detail and acts as a means of reconciling any delamination anomalies.
CS1/CS2 Condition State
Identifying Cracks & Defects BridgeGuard includes a visible-band sensor that performs a high resolution scan of the bridge deck, allowing precise location and characterization of cracks and other surface defects with a survey grade GPS data feed.
Analysis & Reporting Analysis of the infrared deck defects will be completed using BridgeGuard’s proprietary analysis software that allows quantification of the delamination and spall defect areas. A MicroStation or AutoCAD drawing will be obtained from the client or created for each bridge deck showing all of the numbered defect areas drawn in the proper location and orientation. A spreadsheet will accompany each bridge drawing showing the defect number, location, and size, ultimately reporting the defect area as a percentage of the total bridge deck area.
CS3 Condition State
Need image approval
Infrared Scan with hidden delaminations
INFRARED & VISIBLE BRIDGE SUBSTRUCTURE SCANNING
Bridge Substructure Cap Delamination
Using high tech lenses, BridgeGuard locates delaminations on substructure or superstructure elements without lane closures or snooper trucks. In the past, locating cracks or delaminations in elevated substructure elements such as caps, piles, and deck undersides required lane closures and snooper trucks to perform soundings. BridgeGuard identifies and locates surface defects or cracks without stopping traffic. Subsurface defects like delaminations become thermally visible during periods of thermal flux. With BridgeGuard infrared scoping services, these thermally visible delaminations in concrete structures can now be detected from our inspection boats or from the ground. Our precision digital range finders allow accurate measurements of delamination surface area. The area of delamination is later quantified during analysis of collected image data and entered into the report data. Report output of delaminations will be completed using MicroStation or AutoCAD software to enable end users to seamlessly integrate this critical information into existing bridge files.
BridgeGuard Services Include: • Quantifying area of delaminations • Inspect elevated concrete structures • Elimination or reduce lane closures • Remote scoping from surveyor’s tri-pod, boat or hand held systems • Data collection and analysis by ASNT certified technicians • Electronic web-based downloads and report notifications for clients
IR Analysis of Bridge Elements Bridge surfaces are subject to continuously varying thermal inputs due to their exposure to atmospheric events, such as convection forces, solar radiation, and thermal radiation exchanges. Technicians choose when an IR scan will occur based on the natural thermal environmental conditions which create thermal anomalies consistent with bridge delaminations (or signatures). This change in signature is a predictable pattern resulting from the natural cyclic change of thermal conditions that occur during the transition from day to night and back again, referred to as the Diurnal Cycle. At Right: Conduction paths around a delamination in the bridge deck during morning warm-up. Delamination interrupts the conduction path as the bridge is heated by solar load or by radiant cooling to a clear night sky.
UNDERSTANDING INFRARED Sensing temperatures at the surface enables us to detect delaminations inside the bridge structure. Safely Capture Thermal Light A standard video camera intercepts and records the reflection of visible light, whereas infrared cameras record naturally-occurring emissions and reflections of thermal light. Unlike radar or microwave systems that both transmit and measure radiation, the BridgeGuard sensor is a safe, passive system that does not emit. It can be used directly by operators in any situation without health or safety concerns. In this aspect it is no different than regular video or digital cameras. It simply records lightâ€”or radianceâ€”of a longer wavelength than the human eye can perceive.
High Accuracy Detection BridgeGuard thermal imaging records the infrared radiance of the bridge elements to locate cold and hot spots. These thermal variations can indicate the presence of delaminations within the concrete during periods of thermal flux. The delaminations break the conduction path of heat moving into or out of the bridge (see illustration at left). The longer conduction pathway around a delamination creates telltale hot patches or cold patches that the BridgeGuard sensor records. The sensitivity of the BridgeGuard sensor can detect temperature differences as little as .05 degrees Celsius (NETD).
Daily thermal cycles make delaminations visible to the BridgeGuard sensor Bridge surfaces are constantly heating and cooling through daily cycles. Changes in air temperature, solar intensity, and radiant cooling to night skies move heat into and out of the bridge elements. IR scans are best performed during the steepest changes in bridge temperature. In addition to enabling technicians to identify and report delaminations, the BridgeGuard software requires technicians to record data during optimal conditions. In the case of inclement weather the BridgeGuard software will advise the technician to refrain from acquiring data until conditions have optimized.
IR Analysis of Bridge Elements
DECK SCAN ANALYSIS
DECK SCAN REPORTING
BridgeGuard software records the thermal and visible scan of the bridge while driving over each lane. After scanning a corridor of bridges, the BridgeGuard technician will upload the scan data to our secure web portal for analysis. The BridgeGuard Analysis and Reporting Service identifies the location and the size of defects. As bridge data is compiled over time, regression models may be generated for comparison of bridge decks, rate of delamination growth, and an analysis of multiple bridge deck characteristics.
Trained and certified thermographers provide analysis of the scan data uploaded to our secure web portal, generating detailed reports in MicroStation or AutoCAD format. The reports are then made available for download to the clientâ€™s system for review. Each report will identify cracks and delaminations, and report the percentage of the entire deck area that is delaminated. The percent delamination can be used with bridge matrix guidelines to determine appropriate action.
SUBSTRUCTURE REPORTING Our detailed reports provide a comprehensive infrared and visible understanding of the bridge condition.
Identifying Delaminations & Cracks Detailed reports are compiled and summarized; the collected data files are then exported via a web-based interface, providing a comprehensive understanding of the bridge condition.
Reporting Results A technician exports a CAD file of a detailed bridge condition report showing the area of each delamination. Upon report upload, the client is automatically notified, via email, of the report availability and can then access the secure site to retrieve the bridge report. The report and corresponding data is securely archived for the client and provides a historical record of bridge conditions. The reports are generated in MicroStation or AutoCAD and provided to the client in both CAD and pdf form, and can be printed or posted online for management review.
- Detailed reports include: • Location of each delamination • Quantified area of each delamination and element • Number of delaminations • % of each element delaminated - Asset management • Regression models • Compare rate of growth over time • Compare district to district
PROJECT MANAGEMENT TIMELINE DATA COLLECTION: 20% • Proprietary collection software • Recording infrared and visible surface images • GPS locations and field notes • Logistics
DATA ANALYSIS: 60% • Secure upload to BridgeGuard servers • BridgeGuard software synchronizes locations with IR and visible band images • Certified thermographers • Frame by frame analysis isolates each defect • Square footage of each delamination is calculated and recorded • Location of each crack and delamination is extracted using BridgeGuard software Infrared
DATA REPORTING: 20% Visible Band
• Individual defect/delamination reports • Bridge-level reports • Electronic upload/download to client Allows for: • Year-to-year comparison of bridge degradation • Regression tools for predicting future bridge conditions and scheduling repairs • Regional comparison of percent delaminations
ASSET MANAGEMENT APPLICATIONS The BridgeGuard Asset Management tool is designed to allow the end user to request a variety of statistical bridge data. The tools allow BridgeGuard personnel to compare specific bridge results against previous results or regional or state data. This comparison can be used to evaluate the statistical standard deviation from a single bridge to the district or state mean or any combination thereof. Below are several standard sample BridgeGuard graphical reports that can be developed from collected bridge data.
Regional/District Bridge Ranking Bridge Name/#
Total Bridge Area Overlay Type (sf)
# Delaminations Total Delam. Area (sf)
The ranking of individual bridges or regions within a state can easily be summarized in this report. By doing so the user can identify “at a glance” bridges or districts that may need additional attention. Ranking takes place based on total percentage of delamination for the bridge or average overall percentage of delamination for the district.
The “Delamination by District” chart explains how the average percentage of delamination of a collection of bridges in any given district compares to the average of all the bridges in the sample population of the state.
The “Regression Rate of Change and Projection for Bridge #123-ABC” chart explains the rate of growth from each inspection as well as provides a projected amount of delamination for forthcoming inspections.
BRIDGE CAD SERVICES Leverage our 25 years of experience to update and improve your prints, 3D models, and As-Built drawings. With our CAD services your bridge files can be kept up to date without bringing on additional resources to support you on a temporary basis. This means more efficiency for less dollars. • We use a multitude of file formats to integrate with your files • Cost reduction over existing manual methods
The BridgeGuard staff has design and detail experience utilizing a variety of CAD software packages in wide range of industries from simple conceptual models to various bridge elements. • • • • • • • • •
As-built changes to drawings From infrared images to CAD Layering Solid model bridge structures Redline mark up drawings CAD overlays Custom report outputs Delamination/spall photogrammetry surveys Convert archived legacy data to CAD
• Electronic file formatting for data archiving
EXPERIENCE ACROSS INDUSTRIES
• GoToMeeting or Web X to communicate and manage your project
• Government: DOT, Municipalities, Security
• Seamlessly view delaminations captured by our infrared services • The most recent software releases are used to ensure compatibility with client formats - MicroStation - AutoCAD
CAD DESIGN SERVICES
• Commercial: Mobile Heavy Equipment, Material Handling Equipment, Automotive Components, Plant Process Design, Control Systems, Industrial/Mobile Electrical Systems • Military: Land and Sea Applications
INFRARED LEVEL I CERTIFICATION TRAINING Get the skills you need to effectively perform nondestructive testing.
THIS COURSE WILL: • Develop an in-depth understanding of the physics of infrared (IR) • Provide an in-depth understanding of IR camera operations - What the camera sees, why, & interpretation • Cover the thermal process of IR radiation and its application to bridge elements
IR Camera Training
• Address and solve the practical problems typically standing in the way of a successful program
Formal training is an important and necessary element in acquiring the skills to effectively perform nondestructive testing (NDT) specific to bridge elements.
• Teach thermographers to fully utilize their cameras in specialized applications
BridgeGuard offers bridge specific Infrared Level I Certification Training that meets ASNT-TC-1A Requirements. This course is designed specifically for state DOTs and other bridge owners who have acquired infrared (IR) cameras or are thinking of obtaining IR cameras. BridgeGuard Infrared NDT instructors will come to your facility to train your personnel.
• Provide thermographers post-classroom support to enhance and extend formal classroom instruction • Maximize the use and dissemination of information gathered during field processes.
Goals & Solutions The goal of the BridgeGuard training program is to ensure its students become as proficient as possible in the use of IR cameras. Only then will he/she get the most from the camera and the greatest return on an organization’s investment. In this context, formal training will pay dividends in the growth and accuracy of any bridge structure inspection program. To achieve these goals, our program consists of the following: • Basic Thermal/Infrared Physics Course • Basic Thermal/Infrared Operating Course • Basic Thermal/Infrared Applications Course • Hands on training specific to bridge elements • Exceeds ASNT-TC-1A certification requirements
Getting Started with BridgeGuard速 Online and live demonstrations of BridgeGuard are available to qualified organizations. Contact us to schedule a review with your team. Visit us online at BridgeGuard.net
速 A DIVISION OF TALON RESEARCH, INC. BridgeGuard速 is a registered trademark of Talon Research, Inc.
Phone: 866-780-8722 Email: info@BridgeGuard.net www.BridgeGuard.net
401 Hancock Street Hancock, Michigan 49930 Made in the USA 20130909