figure Q4 shows three configurations of inductive proximity sensor. 1)what is th
ID: 2293103 • Letter: F
Question
figure Q4 shows three configurations of inductive proximity sensor.
1)what is the function of the shield shown in figure Q4 (a) and (b)?
2)there are two coils shown in figure Q4 (b). name both coil and their functions.
3)figure Q4 (c) shows a non-shielded inductive procimity sensors. give advantage and a disadvantage of this type of sensor.
4)provide two differences between inductive proximity and capacititve proximity sensors.
5)how to measure rotational speed using proximity sensors? draw a schematic diagram of its configuration to visualize the working principle.
6) beside inductive and capacitive proximity sensor, name two more types of proximity sensors.
Figure 04Explanation / Answer
1) The function of shield is to that the flux is concentrated at the front of Sensors, which reduces the influence of surrounding metal.
2) Two coils are primary and secondary winding or coil.
Function:- The change in inductive coupling between coils, referred to as primary and secondary windings, are measured by LVDTs, RVDTs, and resolvers. The primary windings couple energy into the secondary windings but the ratio of energy coupled into the individual secondary windings varies proportionately to the relative displacement of a magnetically permeable target.
3) Disadvantage:- the surface of the sensing coil on Unshielded Proximity Sensors is not covered with metal, so flux is also generated from the surface, which makes Sensors easily influenced by surrounding metal.
Advantage:- cost effective
4) Inductive sensors use a magnetic field to detect objects. Capacitive sensors use an electric field. In order to be sensed by an inductive sensor an object must be conductive. This limits suitable targets to metal objects (for the most part). In order to be sensed by a capacitive sensor the target doesn’t need to be conductive. A capacitive sensor will react to an object acting as a dielectric material as well as a conductive object. This makes metal and non-metal objects suitable targets.
5) Tachometer
6) a) capacitive displacement sensor
b) Eddy current
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