单声束周向旋转扫描探测技术  

Study on Single Acoustic Beam Circumferential Detection Technology

作　　者：孟凡达[1] 马少杰[1] 朱海洋[1] 

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,南京210094

出　　处：《兵器装备工程学报》2017年第1期119-124,共6页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金项目(51275248)

摘　　要：针对阵列式超声探测系统空间限制和固有盲区的问题,提出了一种新型的超声波周向扫描方案。设计了可以实现调节声波信号发射角度和转速旋转扫描机构,该结构简单可靠。对超声波声场进行仿真,使用具有增强声场和指向性的超声传感器。在同步扫描系统的基础上,对单声束探测目标车辆信息、回波信号和脉冲频率与转速匹配关系进行数值仿真分析,确定信号脉冲频率与电机扫描转速的最佳匹配参数。使用原理样机进行扫描探测实验,结果表明:当超声脉冲频率f≥27 Hz,周向扫描转速范围n=233 r/min,周向扫描探测系统能捕获速度低于70 km/h的目标车辆,同时验证了超声波周向扫描探测可行性,为单束超声周向探测系统设计提供依据。For the problems of ultrasonic detection system to space limitations and inherent blind spots,a new type of ultrasound circumferential scanning program was put forward. First of all,the rotary scanning structure was designed,which is simple and reliable and can adjust the angle of the acoustic emission signals and the rotating speed. Ultrasonic transducer with the enhanced sound field and direction is chosen according to ultrasonic sound field simulation. Secondly,on the basis of synchronous scanning scheme,best match parameter signal pulse frequency and scanning speed of the motor was confirmed according to numerical simulation analysis about single-beam probe target acquisition vehicle and the echo signal and the rotating speed and the relationship of pulse frequency and rotating speed. At last,we proposed scanning probe experiments with the use of principle prototype. The results show that target acquisition rate was analyzed. Calculating results demonstrate that the highest speed of ultrasonic circumferential scanning system is 233 r/min in the case of good compatibility when the ultrasonic pulse pace is f≥27 Hz,which can acquire the target with a speed lower than 70 km/h and verify the feasibility of ultrasonic scanning probe week. This provides basis for design of single beam ultrasonic circumferential detection system.

关 键 词：单声束 超声探测 扫描机构 周向 最佳频率与转速 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TB55[自动化与计算机技术—控制科学与工程]