The odometer is different in the car now. It overcomes the shortcoming of "keeping the car in mind" and can tell you how many kilometers you have traveled this time and how many kilometers you have traveled since leaving the factory. Therefore, whether the vehicle needs to be overhauled and whether the engine proportion relationship should be scrapped are recorded.
Taking a taxi has become a very common thing in everyone's daily life, and the main basis of taxi charging is the mileage, and the charging is calculated by the meter according to the data of the odometer. Do you know the principle of odometer? Listen to me slowly.
In fact, the principle is very simple, because the diameter of the car wheel is known and the circumference of the wheel remains unchanged. From this, we can calculate how many times the wheel turns every mile, and this number is also constant. So as long as you can automatically accumulate the revolutions of the wheels and then divide them by the corresponding revolutions per mile, you can get the mileage.