ISHM

Clark School

DEPARTMENT OF CIVIL & ENVIRONMENTAL ENGINEERING

Tasks and Deliverables

Task 1  |  Task 2  |  Task 3  |  Task 4  |  Task 5  |  Task 6

Task 1: Establishing weak point identification maps and conducting baseline field tests

This task involves collecting field data from the specified baseline test bridge in Maryland. The test will be conducted on a steel bridge led by UMD team. Findings from this task will be included in the report to US DOT.

  • Subtask 1.1: Analyzing the bridge
  • Subtask 1.2: Sensor placement on the bridge
  • Subtask 1.3: Environmental variable data collection
Outputs/Deliverables:
  1. A sensor placement scheme which will be used for Task 5;
  2. Field test data collected which will be used for sensor and system development efforts in Tasks 2 and 4.
  3. A report that includes the findings of the all activities performed under Task 1 described above (finite element model, sensor placement scheme, environmental variable data, etc.) and details of baseline test on the specified bridge. This will be prepared in accordance with the requirements of US DOT and made available on the project website. Reporting will be due to DOT within six (6) months of the effective date of the Agreement.

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Task 2: Fabrication and characterization of piezo paint AE sensing dot array

The UMD team will lead this research task on transformational development of a flexible and high-fidelity piezo paint acoustic emission (AE) sensor. The piezo paint AE sensor will be optimally tailored for the proposed AE signal based diagnostics algorithm. Development efforts will be made to realize a new version of piezo paint AE sensor that will inherit the low-profile and wideband features of the existing piezo paint AE sensor while extending to relatively large flexible pieces with sensing dot array.

  • Subtask 2.1: Development of piezo paint sensor with larger size and improved sensitivity
  • Subtask 2.2: Development of piezo paint AE sensing dot array
Outputs/Deliverables:

Outputs will be:

  1. The piezo paint AE sensor for integration with wireless sensors in Task 4 and lab/field validation/characterization tests in Task 5.

Deliverables of this task are:

  1. Piezo paint AE sensor with improved sensitivity and sensing dot array;
  2. A report that describes the findings of the all activities performed under Task 2 described above (piezo paint sensor with improved sensitivity, piezo paint sensing dot array), description of corresponding development procedure for modeling, fabrication, and experimental characterization of piezo paint AE sensor. This report will be prepared in accordance with the requirements of US DOT and made available on the project website. Reporting will be due to DOT within twelve (12) months of the effective date of the Agreement.

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Task 3: Development of a time-reversal (T-R) method for AE source identification

This task involves the development and verification of the T-R algorithm for detecting, locating, and characterizing the AE source. Laboratory test is planned for validation and debugging the T-R method for fatigue-induced AE source detection and characterization.

  • Subtask 3.1: T-R method development through virtual T-R experiments
  • Subtask 3.2: Lab tests for validating and characterizing T-R method
Outputs/Deliverables:

Outputs will be:

  1. A validated T-R algorithm ready to be implemented on wireless sensors for onboard diagnostics in Task 4 and also used in lab/field validation/characterization tests in Task 5.

Deliverables of this task include:

  1. A new method (T-R method) for passive damage interrogation using AE signals;
  2. A report that documents the research efforts and findings in virtual T-R experiments and lab tests to validate and characterize T-R method for fatigue related damage detection. This report will be prepared in accordance with the requirements of US DOT and made available on the project website.Reporting will be due to US DOT within twelve (12) months of the effective date of the Agreement.

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Task 4: Development of a wireless smart sensor with a hybrid-mode energy harvester and embedded T-R algorithms

In this task, an integrated wireless smart sensor system including a self-sustained wireless smart sensor, a hybrid-mode energy harvester and embedded diagnosis algorithms will be developed.

  • Subtask 4.1: Continuous AE listening capability for wireless sensors with piezoelectric paint sensors
  • Subtask 4.2: A hybrid-mode energy harvester with MWTS and solar panel
  • Subtask 4.3: Mathematical cores in FPGA and embedded algorithms
Outputs/Deliverables:

Output will be:

  1. A wireless smart sensor with a hybrid-mode energy harvester and onboard diagnostics capability based on the T-R method; this wireless smart sensor will be further evaluated on large scale structural testing specimens in lab test of Task 5 and field tests on real bridges in Task 5.

Deliverables of this task include:

  1. A wireless smart sensor comprised of self-sustained wireless smart sensor and hybrid-mode energy harvester. Results will be due to DOT within twelve (12) months of the effective date of the Agreement as an interim report;
  2. A passive damage interrogation method based on the T-R algorithm which that is embeddable in the wireless smart sensor. Results will be due to DOT within eighteen (18) months of the effective date of the Agreement;
  3. A report that documents the research efforts and findings in wireless smart sensor and onboard diagnostics method based on the T-R algorithm, as well as corresponding lab tests to validate and evaluate the wireless smart sensor system. This report will be prepared in accordance with the requirements of US DOT and made available on the project website. Reporting will be due to US DOT within eighteen (18) months of the effective date of the Agreement.

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Task 5: Developing ISHM in both laboratory and field environments and implementation with Bridge Management System

This task involves development and experimental evaluation of a prototype integrated structural health monitoring (ISHM) system in controlled laboratory environment with large scale bridge components and field tests on real bridges. The interplay between key system parameters and system performance will be investigated in the tests. Field testing in a real-world setting provides a comprehensive assessment of the ISHM performance under various environmental interferences and will be conducted in the final phase of the development effort for the ISHM system. The UMD team will lead this task with active participation of the NCSU and URS teams.

  • Subtask 5.1: Developing ISHM for bridges in controlled lab environment
  • Subtask 5.2: Demonstration of ISHM system for bridges in field environment
  • Subtask 5.3: Improving quantitative bridge condition assessment in the Bridge Management System (BMS)
Outputs/Deliverables:

Output will be:

  1. Data sets from lab tests and field tests as well as test details to be uploaded to project website and reports in Task 6.

Deliverables of this task include:

  1. Piezo paint AE sensors integrated with wireless smart sensor and hybrid-mode energy harvester that are validated and thoroughly evaluated through lab tests and field tests on real bridges. Results will be due to DOT within twenty-one (21) months of the effective date of the Agreement.
  2. A commercial-ready ISHM system with remote sensing capability for bridge management that is demonstrated in field tests. Results will be due to DOT within twenty-one (21) months of the effective date of the Agreement.
  3. Strategy of commercialization of the ISHM system. It will be due to DOT within Twenty-four (24) months of the effective date of the Agreement.
  4. A report that documents the research efforts and findings in lab tests and field tests of the ISHM system. This report will be prepared in accordance with the requirements of US DOT and made available on the project website. Reporting will be due to US DOT within twenty-one (21) months of the effective date of the Agreement.

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Task 6: Project Website, Report and Project Assessment

  • Subtask 6.1: Project website
  • Subtask 6.2: Report
  • Subtask 6.3: Strategy of commercialization
Output/Deliverables:

The technical advisory committee (TAC) will be formed and kick-off team meeting will be arranged. Detailed project organization will be updated and results will be due to DOT within three (3) months of the effective date of the Agreement.

This will be followed by other tasks of the project. Deliverables of this task include:

  1. A project website hosted and regularly updated at the UMD server that documents essentials and details of the project work and findings. . Initiation of the project website will be due to DOT within three (3) months of the effective date of the Agreement.
  2. Quarterly status and progress reports and final project report will be prepared according to the US DOT requirements and submitted timely.
  3. Technology transfer deliverables in the form of papers submitted for professional conference presentations and journal publication. It will be due to the US DOT within Twenty Four (24) months of the effective date of the Agreement.

Task 1  |  Task 2  |  Task 3  |  Task 4  |  Task 5  |  Task 6

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