Proximity Calibration Unit

Scope :- :- 

A Proximity sensor can detect objects without physical contact. A proximity sensor often emits an electromagnetic field or beam and look for changes in the field. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. For example, a capacitive or photoelectric sensor might be suitable for a plastic target; an inductive proximity sensor requires a metal target. This project mainly used in the in the proximity sensor manufacturing unit.

Objective

  The objective of this project is to find out the maximum and the minimum sensing point of the proximity sensor in order to determine the specifications of the sensor.

Methodology

The Project is designed with the following blocks such as

• Display
• Microcontroller
• Keypad
• Stepper driver circuit
• Stepper motor
• Proximity sensor
• Metal piece

In this project, the Keypad is used to set the stepping angle of the stepper motor. A keypad consists of several push buttons and they depend on our requirement. The stepping angle can be sent to the microcontroller. A microcontroller (or MCU) is a computer-on-a-chip used to control any electronic device. The microcontroller is programmed already according to our objective. The output signal from the microcontroller is passed to the stepper driver circuit. The stepper driver circuit drives the stepper motor. The stepper motor converts electrical signal to mechanical movement. Stepper motors consist of a permanent magnet rotating shaft, called the rotor, and electromagnets on the stationary portion that surrounds the motor, called the stator. The rotation of the stepper motor depends on the step angle. The stepper motor is connected to the proximity sensor.Infront of the proximity sensor the metal piece is placed. For a particular stepping angle, minimum length of sensing of the proximity sensor is measured. Similarly for a particular stepping angle, maximum length of sensing of the proximity sensor is measured. The minimum and the maximum length are displayed on the LCD Display.

Advantages

• Accuracy in measurement can be achieved
• Speedy process
• Reliable 
• Cheap in cost
•  Low power consumption 

 Applications

The proximity calibration unit can be used in detection of the E-ring insertion, checking of part ID affixed to pallet, Determination of transistor placement, confirmation of seating of piston to be drilled.