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首页> 外文期刊>NDT & E international >Development, experimental validation and tuning of a contact-less technique for the health monitoring of antique frescoes
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Development, experimental validation and tuning of a contact-less technique for the health monitoring of antique frescoes

机译：开发，实验验证和调整用于仿古壁画健康状况的非接触式技术

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摘要

ABSTRACT Monitoring of the health and the conservation state of artistic heritage is nowadays of great interest. It involves various fields of the applied research. In particular, several techniques aimed to determine the state of preservation of antique frescoes through non-invasive (NI) and non-destructive (ND) methods have been recently subjected to a considerable evolution. In this work the authors show the results of some experimental validation of a NI&ND vibro-acoustic technique. The diagnostic technique, based on the application of the Laser Doppler Vibrometry with acoustic excitation, is a non-invasive method of measurement of superficial vibrations. This methodology is still scarcely available due to the lack of experimental data needed for a reasonable choice of operating parameters. Therefore, this set of methods has been applied in many laboratory tests with a proper variety of specimens, in such a way to reproduce many of the characteristic sub-superficial detachments of a damaged antique frescos. The laboratory tests have been carried out using two main sources of excitation: contact excitation {impact test) and contact-less excitation {acoustic test). Thought impact test is not adoptable in the "real life", it has been used as a benchmark to validate the contact-less method. Through the comparison of different zones' dynamic behavior, it is possible to distinguish among surely non-damaged zones, damaged by detachment zones, uncertain zones. One of the targets of this work, in fact, has been to properly tune the method in order to restrict as much as possible the uncertain zone.
机译：摘要如今，对艺术遗产的健康和保护状况的监视引起了极大的兴趣。它涉及应用研究的各个领域。尤其是，最近一些旨在通过非侵入式（NI）和非破坏性（ND）方法确定古董壁画保存状态的技术经历了相当大的发展。在这项工作中，作者展示了对NI＆ND振动声技术进行一些实验验证的结果。基于激光多普勒振动测定法和声激发的应用，诊断技术是一种非侵入性的表面振动测量方法。由于缺乏合理选择操作参数所需的实验数据，因此该方法仍然很少可用。因此，这套方法已在许多实验室测试中使用了适当种类的标本，以这种方式再现了受损古董壁画的许多特征性亚浅表脱离。实验室测试是使用两种主要的激发源进行的：接触激发（冲击测试）和非接触激发（声学测试）。思想影响测试在“现实生活”中不可行，已被用作验证非接触式方法的基准。通过比较不同区域的动态行为，有可能在确定未损坏的区域，分离区域损坏的区域和不确定区域之间进行区分。实际上，这项工作的目标之一是适当地调整方法，以尽可能地限制不确定区域。

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  • 来源
    《NDT & E international》 |2011年第2期|p.152-157|共6页
  • 作者

    L Collini; R. Garziera F. Mangiavacca;

  • 作者单位

    Department of Industrial Engineering, University of Parma, Viale C.P. Usberti 181/A, 43100 Parma, Italy;

    Department of Industrial Engineering, University of Parma, Viale C.P. Usberti 181/A, 43100 Parma, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    contact-less diagnosis; ldv; antique fresco;

    机译：非接触诊断;ldv;古董壁画;

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