CAJ | 학술논문

近场声全息要获得较高的重建精度必须在全息面上大孔径范围内进行密集的数据采集,需要大量的测量点,测量任务十分繁重.因此在保证重建精度的前提下研究如何有效地减少全息面测量点数对NAH的意义十分重大.提出一种利用支持向量回归对全息面进行插值的方法,该方法可以在全息面传声器数目较少时通过插值提高重建精度,因而可大幅地减少全息面的测量点数.试验表明该方法是有效的.
근장성전식요획득교고적중건정도필수재전식면상대공경범위내진행밀집적수거채집,수요대량적측량점,측량임무십분번중.인차재보증중건정도적전제하연구여하유효지감소전식면측량점수대NAH적의의십분중대.제출일충이용지지향량회귀대전식면진행삽치적방법,해방법가이재전식면전성기수목교소시통과삽치제고중건정도,인이가대폭지감소전식면적측량점수.시험표명해방법시유효적.
In near-field acoustic holography (NAH), accurate reconstruction requires dense measurement grid on large hologram, and so a huge number of microphones are usually demanded. It is significant to find a way to reduce the microphones number effectively while keeping high reconstruction accuracy in NAH implementation. A hologram interpolation approach based on support vector regression (SVR) was presented in the paper. Reconstruction accuracy can be improved significantly with small number of microphones. Therefore, the number of measurement points can be reduced. The presented approach was validated by the experimental results.