摘要
超声传感器阵列是提高超声指向性性能的重要手段,本文提出利用阵列中阵元发射不同振幅超声波的方法进一步改善发射阵列的指向性性能。通过与常规阵元同振幅发射模式的指向性进行模拟和实验比较,结果表明该方法在超声阵列阵元分布形式完全相同的情况下,获得的超声波波束不但能保证主瓣尖锐的指向性,而且能有效的抑制旁瓣数量和旁瓣级,避免能量分散,提高超声发射效率。
The sensor array is important method to improve the directivity of ultrasonic. A new method is proposed to improve the directivity of ultrasonic sensor array by multi-array-elements that transmit different amplitude ultrasonic from each other. The simulation results and experimental results of this method is compared with conventional method, the results show under the same conditions this method that not only can improve the directivity of ultrasonic, but also suppress the range sidelobes efficiently and improve energy efficiency.
出处
《传感技术学报》
CAS
CSCD
北大核心
2008年第5期761-764,共4页
Chinese Journal of Sensors and Actuators
关键词
超声波
指向性
阵元异振幅
传感器阵列
ultrasonic
directivity
different amplitude of array-element
array of sensors
