প্রক্সিমিটি সেন্সর (Proximity sensor) কি

Sensors Proximity (Proximity sensor)

Proximity sensors (Proximity sensor):
Proximity sensors(Proximity sensor)originally used to be is no object, the presence of the mean ,-d'or how much of what you mean. Typically, this type of sensor is an electromagnetic field produced by or electromagnetic radiation emitted by , and the changes to the object, how to,from , or the nature of the What it determine that. Various types of Proximity Sensor different types of objects, the determination to use that are , for example Capacitive sensors are used to make the plastic , wood or various insulation / conductive objects to locate the service. Inductive sensors are used to make the metallic magnetic materials to do so.

Sensors and transadiusara ever and their Types

Proximity sensors (Proximity sensor) are basically of two types .
1. PNP
2. NPN

There are basically different types of proximity sensors based on the work.

Capacitive Proximity Sensor
Inductive proximity sensor
EEE Admission Question & Answer
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Capacitive Proximity Sensor

EEE Admission Question & Answer

The capacitive proximity sensor is similar to the inductive proximity sensor, as shown. The main difference between the two, capacitive proximity sensor produces an electrostatic field instead of a magnetic field and the sensing area of the capacitive proximity sensor can be actuated by both conductive and non-conductive materials. A capacitive proximity sensor contains a high-frequency oscillating circuit along with a sensing surface formatted by two metal plates. When an object or some type of material gets in the sensing range it disturbs the electrostatic field of the metal plates, changing the capacitance of the proximity sensor, this change results in a change of state in the operation of the proximity sensor.

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I nductive proximity sensor

The inductive proximity sensor as seen in is used to detect both ferrous metals that contain iron and can be magnetized and nonferrous metals such as what we use to conduct electricity and copper. Inductive proximity sensors operate under the electrical principle of magnetism when a fluctuating current induces the voltage in a target object.

The inductive proximity sensor contains a certain type of solid-state control system. It contains an oscillator circuit that generates a high-frequency magnetic field. When the metal object enters the field, it disturbs the magnetic field, this disturbance results in a change of state in the high-frequency circuit .