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 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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Project: AVASS of 12

Confidential Document http://www.kmintegrators.com

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.

Elmex SRS

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