SGER: A New Method for Landmine Detection and Minefield Mapping

SGER：地雷探测和雷区测绘的新方法

• 批准号: 0225424
• 负责人: Gary Brown
• 金额: $ 6.43万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-15 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0225424&HistoricalAwards=false
• 关键词: SGER; New; Method; Landmine; Detection

0225424BrownThis proposal is being submitted under the Small Grants for Exploratory Research (SGER)program and it focuses on answering critical feasibility questions pertaining to a newtechnique for the detection and location of buried landmines and unexploded ordnance. Thesubject technique comprises a standoff, ground based, pulsed radar that launcheselectromagnetic energy into the Norton surface wave mode of propagation. The Nortonsurface wave travels along the air-ground surface at the speed of light in a vacuum andexponentially decays into the ground due to the losses in the ground. By selecting thefrequency properly, sufficient energy will be scattered by the landmine back along thesame propagation path and then received by the radar. This energy is usually insufficientto be above the system noise level so return pulse averaging is carried out using coherenttechniques. If N return pulses are averaged coherently the signal-to-noise power ratiowill increase by a factor of N rendering the signal scattered from the landminedetectable. Location of the mine is achieved by using the pulse width to accomplishresolution in the range coordinate and the radar antenna to achieve resolution in theazimuth angle. In order to achieve area coverage and the best possible angular resolutionclose to the antenna, it is proposed to simultaneously employ both beam steering and nearfield focusing techniques. The critical study, to establish feasibility, is thedetermination of the highest operating frequency for which the Norton surface wave canpropagate on the surface and penetrate sufficiently deep to detect antipersonnel andantitank mines. It is also proposed to develop the appropriate radar range equation forthe Norton surface wave, investigate techniques for maximizing the coupling of the radarantenna to the Norton surface wave, determine the variation of soil conductivity and theradar cross section values for typical nonferrous landmines, and investigate the maximumrange and angle resolution or the acceptable frequencies of operation. Having answeredthese questions, it should be possible to establish the viability of such a radar subjectonly to the need to compute the effects of surface roughness and buried debris on the minescattered signal strength, i.e., the low signal-to-clutter ratio problem.

0225424 Brownthis提案正在根据探索性研究（SGER）计划提交，并着重于回答与纽特技术有关的关键可行性问题，以检测和位置埋葬地雷和位置。对象技术包括一个僵化的，基于地面的脉冲雷达，该雷达将发射电磁的能量进入诺顿表面波浪传播模式。 Nortonsurface波以真空中的光速沿着气球表面沿着空气地面行进，并且由于地面的损失而呈指数逐渐腐烂到地面。通过正确选择频率，地雷将沿这些传播路径散布足够的能量，然后由雷达接收。这种能量通常不足以超过系统噪声水平，因此使用相干技术进行返回脉冲平均。如果n返回脉冲平均平均，则信号到噪声功率比率增加了n使从地内探测器散射的信号的因子。通过使用脉冲宽度在范围坐标和雷达天线中完成分辨率以在剧场角度分辨率来实现矿山的位置。为了实现面积覆盖范围和最佳的角度分辨率到天线，提议同时采用光束转向和近场聚焦技术。为了确定可行性的批判性研究是最高工作频率的定义，诺顿表面波可以在表面上启动并穿透足够深的地方，以检测抗生素和抗生素。还建议为诺顿表面波开发适当的雷达范围方程，研究用于最大化Radarantenna与诺顿表面波的偶联的技术，确定土壤电导率和典型非有效性地雷的Theradar横截面值的变化，并研究最大值和角度分辨率或可接受的操作频率。回答了这些问题后，应该有可能建立这种雷达的生存能力，以计算表面粗糙度和掩埋碎片对地雷信号强度的影响，即低信噪比比率问题。