elmex srs
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KM Integrators Pvt. Ltd
E-201, Vasant-Vihar Township, Udhna Magdalla-City Light JunctionUdhna Magdalla RD., Nr.China Gate Soc., ALTHAN, Surat - 395017
Ph: +91-0261-6540896
Distribution strictly prohibited http://www. kmintegrators.com
Project Name: AVASS Document ID: SRS-ELVS- 01 Version: 1.0
PP Form No: Version Date: 13-7-2010
Type of document: System Requirements Specification Page 1 of 12
System Requirement Study
Document ID SRS-ELVS-01
DocumentName
AVASS SRS
File Name Elmex SRS.doc
Document
Version
1.0
Client Name Elmex.
Project Name Automatic vision assisted sorting system
Project Version 1.0
Created By Himanshu Goyal
Reviewed By
Note:
Development of project will not begin until the client approves the System RequirementsStudy document
After approval from client, any features not mentioned in System requirements study willbe treated as “Design Change”
After Approval of SRS from client, Approval of any Design change will be solely at ourdiscretion
Text in color other than black will have following meaningso Red: Query which client should clarify o Blue: update portion of previous version document o Green: Optional Component, the description will not apply to development process
but is for clients information o Black: standard SRS Texto Yellow Highlighted: Yet to be finalized
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Table of Contents
Note: 1
INTRODUCTION ........................................................................................................................................ 3
OBJECTIVE ............................................................................................................................................... 3
SYSTEM OVERVIEW ........................... ........................... .......................... .......................... ....................... 4
Block Diagram:................................................................................................................................ ............4 System Description: .................................................................................................................................... 4
HARDWARE ............................................................................................................................................ 10
Hardware Overview: .................................................................................................................................. 10
Electrical Diagram: .................................................................................................................................... 11 Hardware Requirement: ............................................................................................................................ 11
SOFTWARE ............................................................................................................................................. 12
Software Implementation: .......................................................................................................................... 12
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INTRODUCTION
An electrical connector manufacturing company produces many types of connectors, rail mountin
terminal blocks for panel wiring and Automation. Rail mounting terminal blocks produced are of various
sizes and specifications. An automatic Vision assisted sorting system will sort those components and
segregate defective items with the accepted items.
OBJECTIVE
Rail mounting terminal blocks are an assembly of small items that are assembled prior to the inspection
process. The objective of this system is to sort the assembled blocks by comparing a master piece with
the pieces in line. There are currently 10 points that need to be considered while inspecting the items. If
any of the listed points come true for the items being checked, the system shall discard it.
Conditions defining defective item:
1. All components missing.
2. Screw missing.
3. Screw Clamp missing.
4. Screw Clamp Tail bent.
5. Current Bar reversed assembled.
6. Screw Clamp wrong assembly.
7. Threads absent in current bar.
8. Shade variation.
9. Short Molding.
10. Groove for screwdriver missing/damaged in screw.
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SYSTEM OVERVIEW
Block Diagram:
Vibratory bo
Feed conveyor
SideCamera
Yellow Edge must be perfectly aligned across the camera axis
RejectionMechanism
Rejection Bin
A c c e p t an c eB i n
Vision system
VerticalCamera
Coloursensor
System Description:
Automatic Vision Assisted Sorting system comprises of
1. Vibratory Bowl feeding system
2. Item conveying system
3. Vision system
a. Vertical scanning
b. Horizontal scanning
c. Shade variation sensing
4. Sorting system
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AVASS Flow Chart
START
Master profile = incoming profile?for conditions 1..6, 9
END
Y
Item entry into
VisionInspection Zone
Item scanning
under verticalcamera
Masteritem
Profile
Item scanning
under Horizontalcamera
Y
Master profile = incoming profile?for condition 10
Item scanningunder Color
sensor
Product selected
1. Grey block2. Brown block
Grey block
Color shade matching?
for condition 8
Item RejectionItem accepted
Y
N
N
N
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Given Below are the criteria on basis of which the sorting mechanism accepts the incoming item or
rejects it. For reference, Master item image is displayed on the right side to have a clear understanding.
1. All components missing
It can be seen from the above image that there are all metal components missing.
2. Screw Missing
A right hand side screw is missing in the item.
3. Screw Clamp missing.
It is clear from the above image that the right hand side clamp is missing in the item.
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4. Screw Clamp Tail bent.
A screw clamp tail is limited to have certain angle of bent. An item with excess bent tail angle is
rejected.
5. Current Bar reversed assembled.
A current bar is assembled between two clamps which is a critical component in a rail mountedterminal blocks. If the current bar is assembled in reverse direction, it is considered as a defective
item. Thus, it gets rejected.
6. Screw Clamp wrong assembly.
A screw clamp has to face its tail in the opposite direction. This is to enable the wire end to get clamped
between clamp and a current bar. If it is assembled otherwise, it is considered as a defective item.
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7. Threads absent in current bar.
Threads in the middle of the current bar have to be checked. If they are missing from a current bar, it is considered as a defect in the item.
8. Shade variation.
If the item to be inspected has a shade variation on a plastic moulding, then it is considered as a
defected item.
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HARDWARE
Hardware Overview:
Vibratory Bowl feeder:
A vibratory bowl feeder is used to collect the components to be checked and feeds them one byone in a certain pattern and orientation to the conveyor belt. The conveyor belt carries those items
under vision system where they are all inspected and decision is taken accordingly to accept or
reject them.
Camera:
In our vision system for connector inspection, we have two cameras and two way lighting
system which are in horizontal and vertical directions.
Colour sensor:
A colour sensor is required to detect shade variation on the surface of the plastic component.
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Electrical Diagram:
FireWireIEEE 1394
card
Conveyor belt
Digitalcard
Digital Output
Short stroke
actuator
Rejection Bin
Hardware Requirement:
Requirement Qty
Vibrator Bowl Feeder with frame, conveyor assembly 1
3 MP camera 2
Colour sensor 1
System PC 1
Short stroke actuator 1
Digital Card 1
FireWire Interface Card 1
3 core, shielded cable 100 meter. 1
HMI Touch Screen Panel (1024 X 768 resolution) 1
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C fid ti l D t h // k i
SOFTWARE
Software Implementation:
The system is controlled to be a stand-alone field program by NI LabVIEW software. Compact Vision
system ensures the camera vision. The control action of a part rejection mechanism will be provided
through System PC. An efficient state machine architecture that ensures robustness of the software, easy
debugging and reliability shall be developed.
In System, user can easily define setting according to his requirement by HMI touch screen. Elegant
popup windows that endure the user friendly interface and faster operations have been implemented.
Some of the snapshots of a user interface is given below.