Kiirusmõõtja

Kiirusmõõtja, commonly known as a speedometer, is an instrument used to measure and display the instantaneous speed of a vehicle. It is a crucial component in modern automobiles, providing drivers with essential information about their travel velocity. The most common type of speedometer in use today is the electronic speedometer, which uses a sensor to detect the rotational speed of the transmission output shaft or the wheel hub. This rotational speed is then converted into a linear speed reading, typically displayed on a digital or analog gauge on the dashboard.

Historically, mechanical speedometers were prevalent. These devices operated using a system of gears and a flexible cable connected to the transmission. The rotation of the cable would drive a magnetic coupling, which in turn would spin a needle on a calibrated dial. While effective, mechanical speedometers were susceptible to wear and tear and less precise than their electronic counterparts.

The primary function of a kiirusmõõtja is to inform the driver about their speed, aiding in adhering to speed limits and maintaining safe driving practices. Many modern speedometers also incorporate additional features such as an odometer, which tracks the total distance traveled by the vehicle, and sometimes even a trip meter for measuring shorter distances. The accuracy of a kiirusmõõtja is essential for legal compliance and driver safety.