The relative characteristics of the pseudo code are analyzed. With discussion on the principle ol ultrasonic level measurement based on pseudo code technology, the level measuring system is designed.

分析了伪随机码的相关特性，讨论了基于伪码相关技术的超声波液位测量原理，设计并完成了液位测量系统。

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First, the basic principle of the strain measurement with bonding resistance, theory of strain measurement, method and the relative signal disposition are introduced in the dissertation.

首先，介绍了电阻应变测量法的基本原理，应变测量的理论、方法以及相关的信号处理知识。

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The measurement principle of the surface material property of spatial attitude sensor is introduced, including spectral diffuse reflectance and the relative reflectance distribution in space.

论述了空间姿态敏感器表面材料测量的基本原理，即光谱漫反射基本原理和光谱相对空间反射分布测量原理。

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