With it developed the system to track and check the vehicle and measure the information parameter of the traffic.

在其基础上实现目标的检测和追踪，及最终的交通参数的测量。

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In this system, the variable frequency motor is applied to meet the requirement of low speed to check the compositive error and high speed to measure the vibration.

针对检测综合误差和振动时对主轴转速的要求，采用变频电机来控制主轴转速，以满足系统对转速的要求。

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This system is based on the principle that speed multiple time equals length. With sound-control circuit and a single chip, the equipment can measure, check, display, print etc.

该系统基于速度乘以时间等于距离的原理，运用声控电路和单片机，具有测量、校准、显示、打印等功能。

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