Abstract: This paper describes the evaluation and improvement of a Dual Band Infrared (DBIR) thermal imaging system developed by Lawrence Livermore National Laboratory (LLNL), under the sponsorship of Federal Highway Administration (FHWA). DBIR thermal imaging system is a nondestructive evaluation technique which has the potential of detecting delaminations in concrete bridge decks, with and without asphalt overlays. The system consist of two infrared scanners, one operating at a wavelength of 3 - 5 micrometer and the other at a wavelength of 8 - 12 micrometers. The scanners are mounted in front of a vehicle and are microprocessor controlled from inside the vehicle. The vehicle is driven at a speed of 40 km/hr and a typical bridge deck can be scanned in less than 5 minutes, with a low level of traffic control. !21
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机译：摘要：本文描述了由劳伦斯·利弗莫尔国家实验室（LLNL）在联邦公路管理局（FHWA）的赞助下开发的双波段红外（DBIR）热成像系统的评估和改进。 DBIR热成像系统是一种无损评估技术，具有检测带有或不带有沥青覆盖层的混凝土桥面板中分层的潜力。该系统由两台红外扫描仪组成，一台扫描仪在3-5微米的波长下工作，另一台在8-12微米的波长下工作。扫描仪安装在车辆前方，并由车辆内部进行微处理器控制。车辆以40 km / hr的速度行驶，可以在不到5分钟的时间内对典型的桥面进行扫描，并且交通控制水平较低。 ！21
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