CAJ | 학술논문

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%。
해문근거취초성장측량적요구，응용LabVIEW허의의기평태건립료일개취초성장측량계통。해계통능구자동심조취초성장적초점위치，병근거초역적대소조정소묘로경，삼유성장소묘시간종균균보장적888 h감소도변보장적9.25 h，제고료성장측량효솔。이론계산여계통측량결과존재일정편차，기중초평면-6 dB 관도차이솔위3.691%，성속축-6 dB장도적차이솔위12.937%。
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 automatical y 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%.