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gps speedometer for car
GPS devices follow the most classic formula: speed = distance / time to calculate speed.
When the vehicle is driving, the GPS device will continuously track the position of the vehicle and measure the driving distance of the vehicle. If the driving distance is divided by the driving time between the two places, the number obtained is the driving speed of the vehicle between the two points.The speedometer is prone to mechanical error, and GPS is calculated by calculating the time from point a to point B. generally speaking, GPS is more accurate, but there is little difference in accuracy between the two. Although there are mechanical errors in the speedometer, in view of the intimate service of the manufacturer to increase the speed, it should no longer blindly pursue the accuracy of the speed.
Matters needing attention:
1. Correct speed control is a necessary condition for safe driving. The so-called medium speed driving and safe comity. Generally speaking, users can set this speed as a safe speed according to the model and performance of the vehicle they drive. If this speed can meet the relevant provisions of traffic regulations and traffic environment.
2. Closely observe the traffic signs along the way. In case of speed limit signs, drive in strict accordance with the provisions of the signs.
3. According to the road conditions and operating conditions, flexibly master and control the speed, which is fast and slow.
4. When driving on roads with heavy traffic, many vehicles and natural speed rhythm of traffic flow, make your speed follow the speed of traffic flow and don't overtake in a hurry.
5.Try to keep the economic speed stable and avoid overtaking at high speed and driving slowly at low speed. When the vehicle load is light and the road conditions are good, the economic speed can be appropriately higher, while when the vehicle load is large and the road conditions are poor, the economic speed must be reduced.
GPS uses a pure mathematical technology to measure the speed of the vehicle, so it is more accurate than the speedometer. Because the GPS receiver needs to interact with the satellite, it is more accurate to use it in an open place with good weather. Most importantly, the speed calculated by GPS is not the instantaneous speed of the vehicle, but the average value of a distance, and the calculation of speed will be slightly delayed.
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