发明申请
US20190238178A1 HIGH SPEED FREQUENCY HOPPING DAS INTERROGATION USING AOM-GATED RE-CIRCULATING LOOP AND FREQUENCY-SHIFTED RECEIVER LO
审中-公开
基本信息:
- 专利标题： HIGH SPEED FREQUENCY HOPPING DAS INTERROGATION USING AOM-GATED RE-CIRCULATING LOOP AND FREQUENCY-SHIFTED RECEIVER LO
- 申请号：US16258586 申请日：2019-01-26
- 公开(公告)号：US20190238178A1 公开(公告)日：2019-08-01
- 发明人： Yue-Kai HUANG , Ezra IP , Giovanni MILIONE , Fatih YAMAN
- 申请人： NEC Laboratories America, Inc.
- 申请人地址： US NJ PRINCETON
- 专利权人： NEC LABORATORIES AMERICA, INC
- 当前专利权人： NEC LABORATORIES AMERICA, INC
- 当前专利权人地址： US NJ PRINCETON
- 主分类号： H04B1/7136
- IPC分类号： H04B1/7136 ; H04B1/7143 ; H04B1/715 ; G01H9/00
摘要：
Aspects of the present disclosure describe systems, methods, and structures for high speed frequency hopping distributed acoustic sensing using an acousto-optic modulated (AOM), gated re-circulating loop and a frequency shifted receiver local oscillator. Using the re-circulating loop controlled by the AOM to generate frequency-hopping pulse(s) increases DAS acoustic bandwidth overcomes infirmities exhibited in the art that generate multiple frequency patterns that are not suitable for long-distance DAS. Additionally, by employing frequency shifted local oscillator (LO) with asymmetric in band detection, bandwidth requirements are reduced by one half.
公开/授权文献:
IPC结构图谱:
| H | 电学 |
| --H04 | 电通信技术 |
| ----H04B | 传输 |
| ------H04B1/00 | 不包含在H04B3/00至H04B13/00单个组中的传输系统的部件；不以所使用的传输媒介为特征区分的传输系统的部件 |
| --------H04B1/69 | .一般扩频技术 |
| ----------H04B1/707 | ..利用直接序列调制的 |
| ------------H04B1/7136 | ...产生跳频的装置，例如：使用频带资源，使用连续的调谐或使用转换 |