Automated checking weighing system

Proposed System

The proposed system consists of a Reflective IR Sensor, PIC16F877A microcontroller, HIN232CP IC, a weighing scale that outputs serial data and two pneumatic arm controllers. The main objective of the system is to weigh a package when it is not in motion to and check whether the package is within the given weight limit of 225±5g where this value is set in the program itself. If the package weight is within the weight limit the pneumatic arm 1 is activated where it pushes the parcel on to the conveyor that carries packages with correct weight limit. If the pack weight is greater or less than the weight limit pneumatic arm 2 is activated where it pushes the parcel on to the conveyor that carries packages with incorrect weight limit.

The Reflective IR Sensor and weighing scale are inputs to the main processing unit the PIC16F877A microcontroller and the actuating components (outputs from the microcontroller) are the two pneumatic arms as shown in the block diagram below.

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