小波束角超声测距仪的研制  

Development of Ultrasonic Range-Finding Instrument with Small-Beamwidth

作　　者：宋伟[1] 潘仲明[1] 孔雅琼[1] 杜金榜[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《计算机测量与控制》2008年第4期585-587,共3页Computer Measurement &Control

摘　　要：目前的倒车雷达普遍采用大波束角设计,在此情况下易受干扰,虚警概率大;针对此问题提出小波束角超声测距方法,增强了测距的指向性,提高了抗干扰能力,探测范围限制在车身正后方;通过分析波束角与谐振频率、辐射面积及阵元组合的关系,设计出谐振频率为82.7kHz的3元线性传感器阵列,波束宽度为2.2°,满足小波束角超声测距的要求;设计了发射/接收电路,采用了推挽式功率放大电路,回波信号由C8051f300单片机电路处理,经实验验证,回波比较理想。The Current car-revering radar normally employed the large-beamwidth design to work which leads to bad anti-jamming ability and big probability of fake alert. Aiming at the problem, a method of small-beamwidth for ultrasonic range-finding system was given in the paper. By which the directional property of the system was strengthened, the performance of anti-jamming ability was improved, and the detecting scale was limited in the straight back of the car. The ultrasonic transducer in 3-element linear array whose resonance frequency is 82. 7KHz and the beam width is 2. 2° was adopted to satisfy the desire of the small-beamwidth method by analyzing the relationship among the beam width, the resonance frequency, the radiate area and the element array combination. Also, the transmitting/receiving circuit were designed and the push-pull power magnifine circuit was used . The echo signal would be processed by the singlechipC8051f300 processing electronics. By validating the experiment result shows the echo image is preciseness.

关 键 词：超声波传感器 小波束角 测距仪 

分 类 号：TB212.9[一般工业技术—工程设计测绘]