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汽车的动力性能包括加速性和最高速度等是汽车的主要性能之一。国内研制成功的砷化镓汽车测速仪,用非接触测量法测出汽车经过固定两点之间所需的时间,求得两点之间的平均速度。这种测速仪可以测定最高车速,但它不能测量瞬时速度,也就不能测定汽车的加速度。我们用CO_2激光多普勒测速法,可以精确地测定瞬时速度,所以不但能测定汽车的最高速度,而且也可以测定汽车的加速性能,测定结果比以前用的五轮仪精确,而且数据处理也大为简化。
The car’s power performance, including acceleration and maximum speed is one of the main performance of the car. China has successfully developed a gallium arsenide car speedometer, measured by non-contact measurement of the car after the fixed two points between the time required to find the average speed between two points. The speedometer can measure the maximum speed, but it can not measure the instantaneous speed, it can not determine the car’s acceleration. We use CO_2 laser Doppler velocimetry, which can accurately measure the instantaneous speed, so not only can measure the maximum speed of the car, but also can be measured car acceleration performance, the measurement results than the previous five-wheel precision, and data processing Greatly simplified.