Final answer:
A tacho-generator is a device that converts rotational speed into electrical signals, allowing for the direct and accurate measurement of speed. It consists of a rotating shaft connected to the object being measured and a permanent magnet. The speed of the object can be determined by measuring the voltage signal produced by the tacho-generator.
Step-by-step explanation:
A speed measurement system using a tachometer generator works by converting rotational speed into electrical signals. The tachometer generator, or tacho-generator, consists of a rotating shaft connected to the object whose speed is being measured, and a permanent magnet. As the shaft rotates, it induces a voltage in the generator's coils, which is proportional to the speed of rotation. This voltage signal can then be measured and used to determine the speed of the object.
For example, let's say the tacho-generator is connected to the axle of a car. As the car moves, the axle rotates, causing the tacho-generator to produce a corresponding voltage signal. By measuring this voltage signal, we can calculate the rotational speed of the axle, which is directly related to the car's speed.
In this way, a tacho-generator provides a direct and accurate measurement of speed by converting rotational motion into electrical signals.