Gps speedometer app without data
It means that the instrument readings are proportional to the number of pulses per time unit. The data from the electromechanical odometer is based on the electronic pulse counter readings from the speed sensor. Depending on the operating conditions of the vehicle, the wear of components and assemblies, as well as the use of non-OEM parts, the total error can reach even 12-15%. The mechanical odometer by default has an error of up to 5%. The error gap depends on the type of odometer installed in the vehicle. The main reason for doing this is ensuring road safety and reducing the number of traffic accidents globally. In our experience, automakers usually calibrate the speedometer and odometer so that the readings exceed the actual value by 5-10%. Besides, according to technical requirements, speedometers can’t lower the reading, therefore if the odometer is connected to the speedometer, it will only give higher data readings.Īccording to legislation, the average speedometer error can only be positive and not exceed the actual speed for more than 10% + 6 km/h. Each of the device types has the limit of permissible error. None of the odometers installed in vehicles can be considered as precise tools for data reading. How various odometer types influence mileage data? Besides, if the vehicle has incorrectly sized tyres, the error percentage can be even higher. If you compare the numbers, it becomes clear that such a scenario is very likely to happen. It’s calculated thatĪ change in the wheel radius by 5 mm leads to a change in the mileage reading on the odometer (also tachograph) by about 2%. It means that a decrease in tread depth will also decrease the wheel radius. According to international legislation, the tread depth for new tyres can vary between 6 to 10 mm, with the minimum legal depth being 1.6 mm for summer and from 3 to 4 mm for winter tyres. Tyre condition and, specifically, the wheel radius is one of the factors that affect the distance data. Tyre condition impact on distance readings Temporary satellite signal interferences due to temperature, pressure, humidity and other conditions, etc.The presence of permissible odometer errors.Use of worn or incorrectly sized tyres.The data accuracy depends on various factors, such as: Odometer data is received through various electro-mechanical converters and depends on the wheel speed, while GPS fleet tracking system data is obtained by mathematical calculations of the vehicle’s location according to the navigation satellites. This article provides a broader explanation of how and why distance data vary depending on whether you get it from odometer or GPS.įirst and foremost, the data differs because it’s obtained in different ways. We often receive various questions about fleet data – how we gather and analyse them, and, most frequently, why is there a difference in the same data that is obtained from various sources.