To evaluate the mechanical properties of structures in service, a portable micro-indentation device was developed and built. The basic design principle of the indentation device, i.e. measurement of the indentation depth and the indentation force with sufficient accuracy, was discussed. To avoid using load cell to decrease the machine compliance, a new method that using the current through voice coil motor to calculate the indentation force was proposed. After analyzing the equivalent mechanical model of the developed device, an eddy current displacement sensor was installed on the device to improve the measurement accuracy of indentation depth. Indentation tests were performed on polymethylmethacrylate (PMMA) and unplasticized polyvinyl chloride (UPVC) with the developed device and the commercial indentation device ZHU2.5 to demonstrate the validity and accuracy of the developed micro-indentation device.

为了评估使用中的结构的机械性能，开发并制造了便携式微压痕设备。讨论了压痕装置的基本设计原理，即以足够的精度测量压痕深度和压痕力。为了避免使用测力传感器降低机械柔度，提出了一种利用通过音圈电机的电流来计算压入力的新方法。在分析了所开发设备的等效机械模型之后，在设备上安装了涡流位移传感器，以提高压痕深度的测量精度。使用开发的装置和商用压痕装置ZHU2对聚甲基丙烯酸甲酯（PMMA）和未增塑的聚氯乙烯（UPVC）进行压痕测试。