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美國Bridge Diagnostics, Inc. (BDI) 
BDI（橋梁診斷試驗公司）是美國科羅拉多州專門致力于研究經濟實用結構評估的公司。

BDI曾經在HNTB（邁阿密國際機場的運輸線大橋）；Finley-McNary Engineers (Natchez Trace公園干道拱橋）；Modjeski & Masters 公司；特拉華大學；蒙大拿州立大學；佛羅里達州環球影視城；土壤力學公司（馬來西亞）；科羅里達、懷俄明，堪薩斯州運輸部門等眾多機構的橋梁工程項目中進行了荷載測試。

STS-WiFi采用了高效的現場測試方法，它所用的時間比傳統的應變數據記錄方法所用的時間減少一半以上；采用應變傳感器取代了應變片，與應力應變片相比，準備工作工作少，安裝每個傳感器只需3至5分鐘，避免過多紛雜的電纜和其他繁瑣的安裝工作，可以使土木工程師可以更專注于結構的評估。

自1989年起，在300個以上的結構測試經驗的基礎上，STS-WiFi已被改進成皮實堅固，輕巧高效的便攜設備，對于一個典型的橋梁采用64通道的STS-WiFi一天之內就能完成檢測。

STS-WiFi系統采用一個獨立的基站，并帶16個四通道STS- WiFi，該系統安置在結構上靠近傳感器的地方。友好易用的WinSTS軟件用于控制STS- WiFi并允許使用者對信號強度和電量剩余進行監測在傳感器的支持方面，堅固耐用的精確的BDI傳感器已經為公路大橋，閘門以及其它土木建筑物記錄了數千個應變測試數據。所有的STS-WiFi系統標配都含有BDI的高精度智能型應變傳感器. 此外, 該系統還支持很多其他類別傳感器包括，LVDT型傳感器, 壓力盒, 總線型電位計, 加速度計, 和箔式應變計。BDI還提供獨特的智能型應變傳感器，使用該傳感器將得到更加精確的測試結果。

Based on the experience of more than 350 field tests since 1989, Bridge Diagnostics, Inc. (BDI) provides the most efficient structural load testing services available. In addition, BDI manufactures equipment specifically designed for bridge testing, including our new Wireless Structural Testing System, our Long-Term Structural Monitoring System and our BDI Fatigue Monitoring System (BDI-FMS). If you’re tired of trying to adapt general-purpose data acquisition systems to your testing needs and would rather use the right tool for the job, please contact us!

Company History
In the late 1980’s, two bridge research projects were conducted at the University of Colorado in Boulder. The first was sponsored by the Pennsylvania Department of Transportation (PennDOT) and required the implementation of an efficient technique for developing highway bridge load ratings based on load test results. The second project was funded by the Federal Highway Administration (FHWA) and furthered this initial research to include recording the dynamic behavior of various bridge types. Approximately 50 highway bridges were tested and evaluated during the course of these two projects, and hardware and software delivered to each of the sponsors.

Based on the results of this extensive experience, the key personnel from the two projects founded Bridge Diagnostics, Inc. (BDI) in October, 1989. BDI has gone on to test and evaluate another approximately 200 structures around the U.S., Asia, and Australia. While most of these tests have been conducted on highway bridges, BDI has run many tests on railroad bridges, lock gates, and amusement park rides. Some of the clients that BDI has worked with are the U.S. Army Corps of Engineers, New York DOT, Seattle DOT, Louisiana DOT, and many government municipalities and universities.

The individual members of BDI have had a great amount of field testing and structural evaluation experience. The President, George Goble, Ph.D, P.E., first began field testing bridges in 1972 on a research project funded by the Ohio DOT in which 10 structures were tested. He also led the project that developed the Pile Driving Analyzer, and helped found Pile Dynamics, Inc. and Goble Rausche Likins and Associates, Inc. (GRL), of Cleveland, Ohio. He was on the faculty at Case Western Reserve University for 15 years and is Professor Emeritus of the Civil Engineering Department at the University of Colorado in Boulder.

Jeff Schulz, P.E. is the Chief Testing Engineer and a co-founder of BDI. He was responsible for the development of the instrumentation and performing the tests on both the PennDOT and FHWA bridge projects. In all, Mr. Schulz has supervised the testing operations on more than 350 structures around the U.S., Asia, Australia, and India. He is also responsible for the development of the Structural Testing System (BDI-STS).

In addition to the extensive field experience of the firm members, Brett Commander, P.E., another co-founder and Chief Analysis Engineer, adds a significant dimension with his analytical modeling and correlation abilities. His experience includes the modeling, analysis correlation, and load rating for the previously mentioned structures, and development of the BDI-Structural Analysis and Correlation software (WinGen, WinGRF, & WinSAC).

In addition to providing load testing and analysis services, BDI manufactures the BDI-STS which has been developed specifically for the purpose of testing highway bridges and other structures subjected to live load. Several customers in the U.S., Asia, and Australia are currently using the new STS to perform their own testing and evaluation. In addition to the STS, BDI has implemented several long-term monitoring systems and developed a laser-based overhead clearance measurement system for collecting clearances at highways speeds.