Uses of Capacitive Transducer: The following are the uses of capacitive transducer: The capacitive transducer uses for measurement of both the linear and angular displacement. It is extremely sensitive and used for the measurement of very small distance. It is used for the measurement of the force and pressures. The force or pressure, which is to be measured, is first converted into a displacement, and then the displacement changes the capacitances of the transducer. It is used as a pressure transducer in some cases, where the dielectric constant of the transducer changes with the pressure. The humidity in gases is measured through the capacitive transducer. The following figure 7 explains one application of the coaxial-cylindrical capacitive transducer for measuring the water level of a tank. Figure 7: Coaxial cylindrical capacitive sensor for liquid-level measurement 3. Inductive Transducers: Inductive transducers may be either of the self-generating or passive type. The self-generating type utilizes the basic electrical generator principle, a motion between a conductor and magnetic field induces a voltage in the conductor (generator action). Passive inductive transducers: They require an external source of power. The action of the transducer is principally one of modulating the excitation signal. The Differential transformer is a passive inductive transformer, well known as Linear Variable Differential Transformer (LVDT). It consists basically of a
Uses of Capacitive Transducer: The following are the uses of capacitive transducer: The capacitive transducer uses for measurement of both the linear and angular displacement. It is extremely sensitive and used for the measurement of very small distance. It is used for the measurement of the force and pressures. The force or pressure, which is to be measured, is first converted into a displacement, and then the displacement changes the capacitances of the transducer. It is used as a pressure transducer in some cases, where the dielectric constant of the transducer changes with the pressure. The humidity in gases is measured through the capacitive transducer. The following figure 7 explains one application of the coaxial-cylindrical capacitive transducer for measuring the water level of a tank. Figure 7: Coaxial cylindrical capacitive sensor for liquid-level measurement 3. Inductive Transducers: Inductive transducers may be either of the self-generating or passive type. The self-generating type utilizes the basic electrical generator principle, a motion between a conductor and magnetic field induces a voltage in the conductor (generator action). Passive inductive transducers: They require an external source of power. The action of the transducer is principally one of modulating the excitation signal. The Differential transformer is a passive inductive transformer, well known as Linear Variable Differential Transformer (LVDT). It consists basically of a