The paper introduce the theory of surface acoustic wave sensor, the digital signal treatment, the method of soft design in the passive and wireless tire pressure monitoring system in detail.

文章详细介绍了无源无线轮胎压力监测系统中的声表面波传感器工作原理、回波信号组成、数字信号处理和软件开发方法；

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The acid value of waste tire crumbs is tested, and the surface of crumbs are activated, then the crumbs are used as the modifier in asphalt mixture.

对废弃轮胎胶粉的酸值进行了测试，并据此进行了胶粉表面活化处理，再用作为沥青混合料的改性剂。

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Apply the weighted surface parameter equation to fit the algorithm of cavity lateral surface, and realize the cavity surface construction of radial parting mold of meridian tire.

采用加权曲面参数方程拟合型腔侧壁曲面的算法，实现了子午线轮胎活络模模具型腔曲面的构造。

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