Large Mileage Deviation Problem
<p>[TOC]</p>
<h3>I. Problem Phenomenon</h3>
<p>After the vehicle has been running online for a period of time, the difference between the mileage calculated by the device and the actual mileage run is large, and the phenomena are:</p>
<ul>
<li>Mileage suddenly becoming large.</li>
<li>Mileage regression of a large value.</li>
<li>There is a certain deviation betweenthe mileage increment for a period of time and the actual mileage increase for the run, but still exists a positive correlation between them.</li>
</ul>
<h3>II. Analysis Steps</h3>
<p>The following steps can be followed to troubleshoot the causes of the problem one by one:
1、Check if the platform has set the initial mileage.
2、Check if the device has set the initial mileage.
3、Check whether the platform track has serious drift phenomenon.
4、Check whether there is a long time non-positioning state of the platform track.
5、Check whether the platform track has a long-term low-speed operation state.</p>
<h3>III. Operating Instruction</h3>
<h4>1、Check if the platform has set the initial mileage</h4>
<ul>
<li>Whether the initial mileage is set in the platform parameter configuration.</li>
</ul>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=1abffc5b26d3091c7256e42dfa0bb0c8" alt="" /></p>
<ul>
<li>Whether the initial mileage has been set by means of a platform text distribution.</li>
</ul>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=bdc333de0bf2ce0f070b1cada8c6394a" alt="" /></p>
<ul>
<li>Whether the initial mileage has been set by command of the SMS.</li>
</ul>
<h4>2、Check if the device has set the initial mileage.</h4>
<p>Whether the initial mileage is set in the device menu SYSTEM SETUP-Register.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=da702a0b4d792ca3d2ddffd4df5be15b" alt="" /></p>
<h4>3、Check the drift phenomenon of platform track</h4>
<p>In the platform track playback, check whether there is drift, if there is drift, the mileage calculated by the equipment differs significantly from the actual mileage run.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=27357b82d5493370040f6d0d355e3995" alt="" /></p>
<h4>4、Check the platform track for a long time without locating state</h4>
<p>Is the device not located for a long time，you can refer to [GPS Positioning poor/No Positioning](<a href="http://118.195.179.210:9000/web/#/11/315">http://118.195.179.210:9000/web/#/11/315</a> "GPS Positioning poor/No Positioning").</p>
<h4>5、Check the platform track in a long-term low-speed operation</h4>
<p>Checking whether the vehicle is operating at low speed for a long period of time.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=796f40495f342a55d45dc8157bdd30e7" alt="" /></p>