【摘要】 透明风挡是飞行器的关键结构件，必须具有优异的性能。为减轻重量，飞行器透明风挡采用“有机玻璃-透明聚碳酸酯-有机玻璃”的异质多层复合式结构，其性能与透明件各层的厚度紧密相关。现有测量方法无法满足飞行器透明风挡高效率、高精度厚度逐层测量的综合性需求。为此，提出飞行器多层透明风挡谱域低相干测量方法。首先通过正交色散提升色散能力，从而增大测量量程，然后建立透明件厚度与光谱波数之间的映射模型，并利用高精度平行平晶标定了模型参数，最后搭建了测量系统。实验结果表明所提出的方法最大量程超过41 mm,具有微米级的测量精度，测量速度小于8 ms,能够满足飞行器多层透明风挡厚度测量的需求。更多还原

【Abstract】 The transparent windshield is a key structural part of the aircraft, which requires outstanding performance. To reduce weight, the aircraft′s transparent windshield utilizes a heterogeneous multi-layer composite structure of “organic glass-transparent polycarbonate-organic glass”, where the performance is closely related to the thickness of each layer of the transparent windshield. Existing measurement methods cannot meet the comprehensive requirements for efficient and high-precision layer-by-layer thickness measurement of the transparent windshield. Therefore, a new method for spectral-domain low-coherence measurement of the multi-layer transparent windshield is proposed. Firstly, by using the orthogonal dispersion to enhance dispersion capability, the measurement range is increased. Then, a mapping model between the thickness of the transparent windshield and the spectral wavenumber is formulated, and the model parameters are calibrated with high-precision parallel flat crystal. Finally, a measurement system is established. Experimental results show that the proposed method has a maximum range exceeding 41 mm, with micrometer-level measurement accuracy, and a measurement speed less than 8 ms. It can meet the requirements for thickness measurement of the multilayer aircraft transparent windshield.更多还原