Search Coil
The search coil magnetometer or induction magnetometer, based on an inductive sensor (also known as inductive loop and inductive coil), is a magnetometer which measures the varying Magnetic Flux, magnetic flux. An inductive sensor connected to a conditioning electronic circuit constitutes a search coil magnetometer. It is a Magnetometer#Vector_magnetometers, vector magnetometer which can measure one or more components of the magnetic field. A classical configuration uses three orthogonal inductive sensors. The search-coil magnetometer can measure magnetic field from mHz up to hundreds of MHz. Principle The inductive sensor is based on Faraday's law of induction. The temporal variation of the Magnetic Flux \Phi through a ''N'' turns circuit will induce a voltage ''e'' which follows : e = - N\frac which can be expressed in a simpler way : e = - N\times S\frac by assuming that the induced magnetic field B is homogeneous over a section ''S'' (the Magnetic flux will be expressed ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Inductive Sensor
An inductive sensor is a device that uses the principle of electromagnetic induction to detect or measure objects. An inductor develops a magnetic field when a current flows through it; alternatively, a current will flow through a circuit containing an inductor when the magnetic field through it changes. This effect can be used to detect metallic objects that interact with a magnetic field. Non-metallic substances such as liquids or some kinds of dirt do not interact with the magnetic field, so an inductive sensor can operate in wet or dirty conditions.Winncy Y. Du, ''Resistive, Capacitive, Inductive, and Magnetic Sensor Technologies'', CRC Press, 2014 , Chapter 4 ''Inductive Sensors'' Principle The inductive sensor is based on Faraday's law of induction. The temporal variations of the Magnetic Flux \Phi through a ''N'' turns circuit will induce a voltage ''e'' which follows: : e = - N\frac which can be expressed in a simpler way: : e = - N\times S\frac by assuming that the ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]