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Investigation of a New Generation of FCC Compliant NDT Devices for Pavement Layer Information Collection: Hardware and Algorithms.
| 题名： | Investigation of a New Generation of FCC Compliant NDT Devices for Pavement Layer Information Collection: Hardware and Algorithms. |
| 作者： | liu, r. li, j. chen, x. ekbote, a. xing, h. |
| 关键词： | pavement thickness, moisture detection, radar, field tests, laboratory tests, hybrid systems |
| 摘要： | The Federal Communications Commission (FCC) adopted a new rule on ground penetrating radar (GPR) devices on July 12, 2002, that permits the operation of GPRs and wall imaging systems only below 960 MHz and between 3.1 and 10.6 GHz. To comply with new FCC regulations, a hybrid GPR system is developed which includes the following two individual radars: (1) a pulse GPR radar working in the frequency range from DC to 900 MHz for thick pavement layer and subgrade layer thickness and moisture detection; and (2) a frequency-modulated continuous-wave (FMCW) radar working in the frequency range from 3.1 to 8.5 GHz for measuring thin asphalt layers. The GPR data format is now compatible with Texas Department of Transportation (TxDOT) software, which benefits the information sharing and the implementation of this FCC compliant GPR system. Laboratory tests and field tests have been conducted. The measured results agree with the real cases very well. / NOTE:Technical rept. (Sept 2003-Aug 2005). |
| 总页数： | u0701；44p |
| 报告类型： | 科技报告 |
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