轿车车速表指示误差研究

汽车驾驶者准确掌握真实车速，对车辆的行驶安全性和减少道路交通事故的发生及其危害程度有着极为重要的影响。因此，对驾驶者借以了解汽车行驶速度的车速表，其指示值是否准确及指示误差的大小必须加以研究。本文运用数理统计工具及样本实测数据，选取上海桑塔纳ＬＸ轿车车速表检验值进行统计规律研究，给出其分布参数，建立相应数学模型，指明其误差情况，对于深入了解轿车车速表指示误差统计规律，保证车辆的行驶安全性，改进车速表设计均具有十分重要的意义。

Study on Indicatory Error of Car Speedometer

Car drivers know well the real speed of the car being drivien is of great importance for safe drive and in diminishing the traffic accident and its damage. So the accuracy and indicatory error of the speedometer must be studied. By statistics and sample data, and taking the speedometers of Shanghai Santana LX cars as the target, the test values were statistically analyzed to get the distribution parameters and to establish the corresponding mathematical models. From this study, the statistic rule of the indicatory error could be well known. It is beneficial for safe drive and is significant in improving the design of the speedometer.