Robotics/Feedback Sensors/Tachometers

A tachometer is a type of sensor used to measure the rotational speed or angular velocity of a rotating object, such as an engine, motor, or shaft. It provides information about the speed of rotation, which is typically expressed in revolutions per minute (RPM).

Tachometers can be categorized into two main types: contact and non-contact tachometers.

1. Contact Tachometers: These tachometers require physical contact with the rotating object. They typically use a mechanical or magnetic sensor that comes into direct contact with the object to measure its rotational speed. The sensor may consist of a wheel or probe that makes contact with a rotating surface, generating electrical signals proportional to the rotational speed. Contact tachometers are commonly used in automotive applications, such as measuring the RPM of an engine.

2. Non-Contact Tachometers: These tachometers do not require direct physical contact with the rotating object. Instead, they utilize optical, infrared, or laser sensors to measure the speed of rotation. Non-contact tachometers work by emitting a beam of light or infrared radiation onto a reflective mark or surface on the rotating object. The reflected light is then detected and analyzed to determine the rotational speed. Non-contact tachometers are often used in industrial applications where contact with the rotating object may not be feasible or safe.

Tachometers find applications in various fields, including automotive, aerospace, manufacturing, and laboratory testing. They are used to monitor the speed and performance of engines, motors, turbines, conveyors, and other rotating machinery. Tachometers can also be integrated into control systems to provide feedback and enable speed regulation or synchronization of rotating components.

In addition to measuring rotational speed, some tachometers may offer additional features, such as recording maximum and minimum speeds, displaying total revolutions or elapsed time, and providing alarm functions for abnormal speed conditions.

Overall, tachometers are essential tools for monitoring and controlling the rotational speed of various machinery and equipment, allowing for precise operation and maintenance.e