空气冲击波速度是以测量波的传播方向上两个确定点之间的平均速度来实现的。由于空气冲击波在传播过程中速度变化率的非线性,用平均速度来表示中点的即时速度必然会产生误差。此外,测量系统本身也会带来一定的误差。为保证足够的测试精度,应对产生测量误差的原因和主要环节进行一些分析和探讨,这对于设计和使用测速系统都是必要的。 The air shock wave velocity is achieved by measuring the average velocity between two determinations in the wave propagation direction. Due to the non-linearity of the rate of change of velocity of the air shock waves in the course of propagation, the instantaneous velocity of the midpoint represented by the average velocity inevitably results in errors. In addition, the measurement system itself will bring some errors. In order to ensure sufficient test accuracy, the causes and main aspects of the measurement error should be analyzed and discussed, which is necessary to design and use the speed measurement system.