Peiselerrad

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The Peiseler tow wheel ("Peiselerrad"), also known as the fifth wheel , is a measuring device for vehicles with which the distance traveled is measured. It is manufactured by Peiseler GmbH in Groebenzell. According to the principle of a measuring wheel ( odometer ), it is more robust, but a little less accurate.

Although there are similar systems from other providers, the term “Peiselerrad” has become a generic name. Ä. In English-speaking countries, the expression "fifth wheel" (fifth wheel) is also used.

Problem

When measuring the mileage of vehicles, there is the problem that the usually desired accuracy cannot be achieved with on-board resources. For example, speedometers in vehicles are never 100% accurate due to manufacturing tolerances and are usually built in such a way that they show a slightly higher speed than the actual speed. The circumference of the wheels is also not constant, but changes with air pressure and wear. Other sources of error such as slip on the measuring wheel and changed circumference at high speeds contribute to the fact that measurements based on the vehicle's own equipment and wheels are inaccurate.

The solution is to pull a precisely defined wheel, the circumference of which is precisely known and which has its own calibrated measuring device, behind the vehicle to be measured.

execution

The Peiseler tow wheel is a wheel that runs alongside a vehicle and has measuring devices. In order not to falsify the driving values, it must have a low mass compared to the vehicle mass and a low rolling resistance. Therefore, Peiseler wheels are very thin wheels with a rather large circumference, similar to a bicycle wheel. Magnetic or optoelectronic sensors are attached to the wheel, with the help of which the wheel rotation is measured and stored. The speed and acceleration can also be calculated from the distance measured and the time required. In newer versions, this data is also transmitted by radio to a measuring station and combined with any GPS data that may have been recorded . The bucket wheel is usually attached to the vehicle to be measured by means of suction cups, retaining clips, to trailer couplings or to towing eyes.

operation area

In addition to the measurement of maximum speeds and acceleration times of vehicles, the Peiselerrad can be used for all purposes in which an exact measurement of the distance covered is important, e.g. B .:

In many areas of application, however, optical distance measuring systems or GPS receivers are increasingly being used instead of a drag wheel to measure the distance covered.

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