基于超声波法的石质文物表面裂隙深度测量

Assessment of the crack depth on the surface of stone cultural relics using ultrasonic method

石质文物表面裂隙深度的快速、准确测量是制定相应保护措施的前提。本文提出了应用超声波法测试石质文物表面裂隙深度的方法。首先,论文介绍了超声波测试的相关原理;然后,利用超声波仪在室内对新鲜岩块进行了测试以论证该方法的可靠性;最后,利用超声波技术对承德避暑山庄永佑寺后续碑和普陀宗乘之庙某石狮子表面的裂隙深度进行了现场测量。测试结果表明,在一定误差范围内,该方法可以用于石质文物表面裂隙深度的测量。

Fast and accurate assessment of the crack depth on the surface of stone cultural relics plays an important role to develop the conservation measures. The paper presents a method to measure the crack depth by ultrasonic. Firstly,the principle of ultrasonic testing is demonstrated. Then,the reliability of the method is verified by measuring the depth of a manmade crack in the intact rock sample with ultrasonic instrument in the laboratory. Finally,field measurement of the crack depths on the surface of stone tablet in the Yongyou temple and stone lion in the Putuo Zongcheng Temple in Chengde Mountain Resort are performed using ultrasonic method. The results show that ultrasonic method could be used to measure the crack depth on the surface of the stone cultural relics.