摘要
该文根据聚焦声场测量的要求,应用LabVIEW虚拟仪器平台建立了一个聚焦声场测量系统。该系统能够自动寻找聚焦声场的焦点位置,并根据焦域的大小调整扫描路径,三维声场扫描时间从均匀步长的888 h减少到变步长的9.25 h,提高了声场测量效率。理论计算与系统测量结果存在一定偏差,其中焦平面-6 dB宽度差异率为3.691%,声束轴-6 dB长度的差异率为12.937%。
In this paper, according to the requirement of the focused sound field measurement, a focused sound field measurement system was established based on the LabVIEW virtual instrument platform. The system can automatically search the focus position of the sound field, and adjust the scanning path according to the size of the focal region. Three-dimensional sound field scanning time reduced from 888 hours in uniform step to 9.25 hours in variable step. The efficiency of the focused sound field measurement was improved. There is a certain deviation between measurement results and theoretical calculation results. Focal plane - 6 dB width difference rate was 3.691%, the beam axis - 6 dB length differences rate was 12.937%.
出处
《中国医疗器械杂志》
CAS
2014年第3期181-185,共5页
Chinese Journal of Medical Instrumentation
基金
上海市科技攻关项目(11441900200)
