摘要
利用传输矩阵方法,推导了多层介质超声液位检测中回波能量透射系数的表达式.得出了在被检测结构一定的条件下,大的回波能量透射系数对应有一最佳检测频率.由此表明,选择合适的声发射换能器,有助于提高液位检测回波信号的强度.
According to the transfer matrix, the expression of the echo energy transmission coefficient come from multiple mediums in ultrasonic liquid level testing is derived. In a certain medium structure, the echo energy transmission coefficient changing with the ultrasonic testing frequency is studied and the maximum magnitude is obtained. The result shows that in order to obtain the strong echo signal, a suitable selection of the ultrasonic transducer operating frequency is necessary.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第2期47-49,共3页
Journal of Shaanxi Normal University：Natural Science Edition
基金
陕西省教育厅科研基金资助项目(07JK216)
关键词
回波能量
透射系数
回波信号
检测频率
echo energy
transmission coefficient
echo signal
testing frequency
