传统的复合材料损伤和修复评估方法包括仪器化和非仪器化方法。仪器化方法（如键合测试仪）成本高昂，需要熟练的操作员。非仪器法（硬币敲击法）既便宜又简单，但也有缺点:它们依赖于个人的听力和判读，易受工作场所噪音的影响，并且无法提供定量数据。波音公司开发了一种低成本、低技能的仪器化攻丝锤，用于测量与结构局部刚度相关的攻丝脉冲特性。 敲击锤通过数字读数补充操作员的听力。本文介绍了仪器化丝锥锤，概述了其理论基础、设计和验证程序。

Traditional approaches to damage and repair assessment on composite include both instrumented and non-instrumented methods. The instrumented methods (such as bondtesters) are expensive and require skilled operators. Non-instrumented method (coin tapping) are cheap and simple but have drawbacks: they are dependent on an individual's hearing and interpretation, subject to workplace noise, and unable to provide quantitative data. Boeing has developed a low-cost, low skill instrumented tap hammer for measuring tap impulse characteristics, which are related to the local stiffness of the structure. The tap hammer supplements the hearing of the operator with a numeric readout. This paper describes the instrumented tap hammer and outlines its theoretical basis, design, and validation program.