Tablet Visual Inspection System
 TVIS-EX3
PDF   Videos  
 
TVIS-EXX

 TVIS-EXX

 Viswill TVIS-EX2
---Click Images To Expand---
 
Standard Specifications
Item
Specifications
Inspection Functions Applicable Tablets Un-coated, film-coated, sugar-coated tablets; tablets with printed mark on one or both sides; scored tablets; tablets with engraved mark
Tablet Size Circular tablets: 5-12 mm in diameter and 2-8 mm in thickness
Shaped tablets: 5-12 mm in width, 2-8 mm in thickness, and 5-21 mm in length
Non-standard shape tablet is also applicable. 
Inspected Items Dirt, scratch, adherence of foreign particle, crack, chip, deformation, different color, discoloration, scratchy print, blurred print, hair, mottled tablet, etc.
(Algorithm to improve inspection accuracy has been added)
Inspected Surfaces Face, back and side
Inspected Accuracy Defects equivalent to a 50m square black speck
Processing Capacity 350,000 tablets/hour (actual value; dia. 6 mm). The value varies according to the size and shape of tablets.
Hardware Transfer Subsystem Hopper Capacity: 12 L
Vibratory Feeder Transfer capacity: Max. 8000 tablets/mm.
Flow-Control Turntable 600, t 0.5, 0 - 60 rpm
Conveyor Units Suction disc conveyor unit, suction belt conveyor units
Rejection Unit Pneumatic system
Inspection Subsystem Optical Unit 6 optical units (face, 4 ; side, 2) 150 W Halogen lamp (each unit)
Camera CCD line sensor camera x 6*2
Monitor/Communication Terminal Compurter (Windows XPe)
Judgment Processing Unit Microcomputer, high-speed processor, signal processing analog board
Rejection Subsystem Defective Tablet Collection Bin Capacity: 25L 
Uninspected Tablet Collection Bin Capacity: 8L
Pneumatic Unit Suction blower for the disc and belt conveyor units: 2.2 kW
Suction blower for powder collection: 1.5 kW
Cooling blower for the lamp unit: 0.4 kW
Software Inspection functions Individual and overall judgments; Input of sensitivity; Inspection condition setting; Output of inspection results; Networking
Diagnostic functions Monitoring of inspection status;Hardware monitoring; Self diagnosis
Size & Environment Dimensions 1413W1210D 1720H
Power Supply 200 VAC (3-phase), 50/60 Hz,
Pneumatic Pressure 0.35MPa
Ambient Condition Temperature 10 - 30C; Humidity 30 - 70%
Outer Housing Stainless Stell
 
System Outline
 

OUTLINE OF SYSTEM

  • The Tablets Visual Inspection System (TVIS-EX3) ensures appearance quality of tablets.
  • Tablets are placed into the hopper positioned on the upper-top left of the inspection system. 
  • Tablets supplied to the hopper are fed to the flow-control turntable by the vibratory feeder, lined up on the flow-control turntable, and then transferred to the inspection subsystem. 
  • The side of tablets over a 360 degree range and the face and bottom of tablets are inspected while they are transferred by the disc conveyor unit and the belt conveyor units, respectively. 
  • While tablets pass through the lighting units, images are taken by four high-precision CCD line sensor cameras from six different angles, checking for defects using state of the art advanced technical image processing and easy to set-up algorithms.
  • Tablets judged defective during the image processing step are discarded by the double confirmation rejection unit. 
  • Upstream or downstream options, such as a tablet feeder or distributor, may be added to enable unattended operation for an extended period of time e.g. continuous overnight operation.
     
     

Features

TVIS-EX3  Tablet Automated Visual Inspection System

TVIS-EX3, our new Tablet Video Inspection System, upgraded from our prior model (TVIS-EXX) is a high-precision, powerful inspection system.  Based on valuable remarks and feedback from customers, Viswill implemented improvements on the TVIS-EX3;  which enhances: continuous operation, operator friendliness and cleaning efficiency.
 
ENHANCEMENT OF INSPECTION PRECISION
 
HIGH-PRECISION INSPECTION
The unique round-belt suction transfer mechanism firmly fixes tablets on the belt while keeping the tablets intact and the latest image processing technology enables detection of a 50m square or larger black speck on tablets.
 
NEW ALGORITHM
A newly developed algorithm has further improved the detection of defective tables such as those listed below.
  • Defects due to hair or fibers of 50m or less
  • Defects due to dirt or foreign matter on mottled tablets
  • Minute chips on the bottom of tablets with printed marks on one side
  • Minute Chips on the edge of tablets
ENHANCEMENT OF INSPECTION PRECISION WITH OPTIONAL DEDICATED CAMERAS
Optional cameras for the face and bottom may be added to enable recognition and inspection of embossing and scores. The precision of inspecting defective roughness (chips, blotches, peeled coating, etc.) on the face and bottom will be noticeably improved by using this ring illumination system.
 
IMPROVEMENT IN CHANGEOVER AND CLEANING EFFICIENCY
 
SHORTENED TIME FOR ATTACHING AND DETACHING PARTS
Tablet type changeover time has been shortened by decreasing the number of parts to replace, reducing the weight of parts, plus simplifying detachment and attachment procedures. Weight of parts for respective units has also been reduced so that strength of operators does not affect ability to change parts.
 
CONFIRMATION OF RESIDUAL TABLETS
The inspection subsystem, rear side of the inspection subsystem and trough are made simple and visible in structure, thus facilitating confirmation of residual tablets.
 
CLEANING OF PARTS IN CONTACT WITH TABLETS
Parts in contact with tablets are easy to remove and washable.
 
ENHANCEMENT OF PROCESSING CAPACITY
The suction belt system produces stable transfer and soft handling of tablets. A mechanism for improving alignment efficiency on the flow-control turntable has been developed to ensure stable transfer up to 350,000 tablets per hour (6 mm flat round tablet), which is a 50% throughput increase (compared to the conventional model) A new function to confirm inspection time-elapse has also been added with a graphic screen to show processing capacity and defective ratio.
 
ENHANCEMENT IN OPERATOR FRIENDLINESS
 
RECOGNITION OF INSPECTION PRINCIPLES AND SIMPLIFIED CONDITION SETTINGS
Photos of defective tablets can be consulted on the inspection screen (touch screen) and their waveforms may also be checked on the adjacent window.  This function visually shows a detection mechanism for defective tablets by the inspection system. Improvement in continuous operability.
 
CONTINUOUS OPERATION
The inspection system is able to keep continuous operation with the function to automatically solve a blockage caused by half-cracked tablets.
 
COUNTERMEASURES FOR UNCOATED TABLETS (POWDER)
Continuous operability for uncoated tablets is also considerably improved by increasing powder collection ports on the flow-control turntable, adding powder recognition software, altering specifications for the rejection sensors and altering the shape of the powder collecting cleaner on the disc conveyor unit.
 
ONE-TOUCH CHANGEOVER OF SIDE LIGHTING UNIT
Ring and vertical lighting units are employed as the side lighting units.  While both lighting unit were required for the conventional EXX model, a film attachment may be mounted to the ring lighting unit of the EX2 model to alter the lighting unit to a vertical lighting unit, thus markedly reducing cost.
 
GUIDANCE FUNCTIONALITY FOR CAMERA FOCUS ADJUSTMENT
A function to support the operator in obtaining optimum camera focus has been improved for better inspection precision.