出租车计价器内部时钟稳定性实验及分析

提出了一种利用北斗定位系统所提供的高精度UTC作为参考时钟源,检测出租车计价器(以下称计价器)内部时钟稳定性及环境温度适应性的测量方法。将三台不同晶振的计价器作为实验对象,对其内部晶振时间与北斗定位系统所提供的高精度UTC时间进行比对。在常温25℃下累计110天记录计价器内部时钟差,并通过改变实验温度来分析环境温度对计价器内部时钟的影响。本文对实验数据进行处理分析,得到一组能够客观反映其长期稳定性的实验结果。

Experiment and Analysis of the Internal Clock Stability of Taximeters

A method is proposed for measuring the internal clock stability and the adaptability of the environment temperature of taximeters (hereinafter referred to as meters) by using the high-precision UTC provided by the Beidou Positioning System as the reference clock source.The meters with three different crystals are used as the experimental objects,and the high-precision UTC time for the internal oscillator time was compared with the Beidou Positioning System.By changing the experiment temperature,the temperature effects on the meters'internal clocks were analyzed,and the meters'internal clock differences at 25℃ were recorded for 110 days.Through the analysis of the experimental data,the group of experimental results obtained can objectively reflect the long-term stability.