The purpose of the tachometer is to measure the rotational speed of a machine. For example, within the automotive industry, a tachometer is typically displayed on the dashboard of the car. This informs the driver when to shift gears taking the rotational speed of the shaft into account.
What is the principle of tachometer?
The principle of Tacheometric surveying is based on the property of an isosceles triangle, i.e. the ratio of the distance of the base from the apex and the length of the base is always constant.
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