You have heard about proximity sensors in your daily life that are commonly used in mobile or smartphones, tablets, etc. Proximity sensors are commonly used on mobile devices to detect if someone is in nominal range. A proximity sensor is a type of sensor which is able to detect the presence of nearby objects without any … Read more
Figure. RVDT In the previous article, we have learned about Linear variable differential transformer (LVDT). Rotary Variable Differential Transformer (RVDT) is a variation of LVDT and used to sense angular displacement. It is a passive transducer. In short, RVDT provides a variable alternating current (AC) output voltage that is linearly proportional to the angular displacement … Read more
In Inductive transducers, the basic principle is that self-inductance of a single coil or the mutual inductance between two coils is changed by a quantity to be measured i.e. measurand. Usually, the measurand could be a rotary or linear displacement, force, pressure, torque, velocity, acceleration, and vibration. For example, LVDT is an inductive transducer which … Read more
A sensor is basically a device that converts the physical parameter (for example, viscosity, temperature, blood pressure, light intensity, humidity, speed, etc.) into a signal(may be electrical or non-electrical quantity) which can be easily measured. For example, let us consider an electrical resistance temperature element. Here the measurand is the temperature which is being sensed … Read more
A sensor producing an electrical output, when combined with some interfacing hardware is termed to be an intelligent sensor. Intelligent sensors are also called smart sensors, which is a more acceptable term now. Sensors + Interfacing hardwares = Smart sensors This type of sensor is different from other types of sensors because it carries out … Read more
Magneto-Strictive Transducers A magneto-striction transducer is a device that is used to convert mechanical energy into magnetic energy and vice versa. A change in mechanical stress of a ferromagnetic material causes its permeability to change. This phenomenon is called as Joule effect. The reverse process of Joule effect is called as magneto-striction or Villari effect. … Read more
Resolver source: designworldonline.com Resolver is a synchro whose rotor is mechanically driven to translate rotor angle into electrical information corresponding to the sine and cosine of rotor angle. It can interchange rectangular and polar coordinates. It is also called a sine-cosine generator and synchro-resolver. It is an analog device. A resolver is a … Read more