本文用静电激发产生共振和非接触式接收信号的方法测定碳纤维单丝的横截面积和轴向杨氏模量。研究了空气阻尼、激发电极位置、非线性振动等因素对测试精度的影响,提出了降低测量误差的若干措施,为提高测试精度提供了依据。 In this paper, the cross-sectional area and axial Young’s modulus of carbon fiber monofilament are measured by the method of electrostatic excitation to generate resonance and non-contact receiving signals. The effects of air damping, excitation electrode position, nonlinear vibration and other factors on the test accuracy are studied. Several measures to reduce the measurement error are proposed, which provide the basis for improving the test accuracy.