Tablet Presence/Absence Inspection System

Project Overview

This system verifies the presence of tablets inside pre-formed plastic packaging that contains multiple individual pockets. A high-resolution camera with a backlight captures each pack as it moves down the production line. Custom vision software scans for any empty tablet compartments and triggers a pneumatic rejection if a discrepancy is found. Multiple layout templates can be used to adapt to different packaging formats.

Problem Statement

Human inspection of tablet packs often failed to catch missing units, especially on fast-moving lines. Errors led to customer complaints and non-compliance with regulatory standards. With different packaging formats in rotation, manual verification introduced inconsistency and slowdowns.

Solution Architecture

• Conveyor transports sealed packs under inspection camera
• Backlight and industrial camera capture a clear image of the tablet compartments
• Vision software checks each slot to confirm presence of a tablet
• Different templates support various compartment layouts (e.g. 2x5, 3x4, etc.)
• A PLC evaluates the software output and controls the pneumatic rejection system
• Rejected packs are removed from the line into a separate collection bin
• Touchscreen HMI enables configuration and monitoring by the operator

Key Features

Results Achieved

Solution Flowchart

Demo Video