CAJ | 학술논문

对于在用超声散斑相关法测量时,转角对不同强度散斑的影响及散斑场相关性和转角之间的关系做了研究.为了分析界面位移前后,不同照射区域对散斑振幅是如何影响的,文中把超声照射区域化为M个反射基元,利用大量反射基元的统计规律,推导出了散斑形貌误差和统计误差对散斑场的影响关系,这个关系就是散斑的振幅越大,受转角大小的影响就越小;转角越大统计误差对散斑强度的影响就越大.为了验证这个结论作者建立了实验系统,实验结果显示理论分析是正确的.
대우재용초성산반상관법측량시,전각대불동강도산반적영향급산반장상관성화전각지간적관계주료연구.위료분석계면위이전후,불동조사구역대산반진폭시여하영향적,문중파초성조사구역화위M개반사기원,이용대량반사기원적통계규률,추도출료산반형모오차화통계오차대산반장적영향관계,저개관계취시산반적진폭월대,수전각대소적영향취월소;전각월대통계오차대산반강도적영향취월대.위료험증저개결론작자건립료실험계통,실험결과현시이론분석시정학적.
This paper studies the effect of rotating angle on speckle's intensity and the relationship between ultrasonic speckle correlation and the rotating angle by ultrasonic speckle correlation method. In order to make clear how the changed area influences the amplitude of the speckle, the irradiated area is divided into M reflecting element. From the statistical principle of large number reflecting element, it is studied that how the speckle profile error and the statistical error influence the speckle's field. It is found that: as the intensity of speckles increases, the influence of profile error on the speckle's field decreases; as the rotation angle increases, the influence of the statistical error on the speckle's intensity increases. An experimental system is established for verifying the above conclusion, the experimental results show the theoretical analysis is correct.