Title: Development of Web-Based E-Quality Control System Principal Investigators: Drs. Richard Chiou and Yongjin Kwon Research Assistants: Prathaban Mookiah and Satish Anupindi Applied Engineering Technology Goodwin College of Professional Studies,
1Development of Web-Based E-Quality Control
System Principal Investigators Drs. Richard
Chiou and Yongjin Kwon Research Assistants
Prathaban Mookiah and Satish Anupindi Applied
Engineering Technology Goodwin College of
Professional Studies, Drexel University,
Philadelphia, PA
SYSTEM SOFTWARE ARCHITECTURE
Abstract
where the robot coordinate vector R, scaling
matrix T, image coordinate vector I and the
reference robot coordinate vector R0 are given
by
A web-based quality control system via E-machine
vision on inspecting part dimensions and
tolerance and connecting with robotic operations
in manufacturing. The remote accessibility and
the ability to control the equipment over the
Internet present unprecedented benefits to the
current manufacturing environment. Designers
located remotely from the production facility can
carry out the quality inspection and diagnosis as
their design processes evolve. The remote
quality monitoring system takes Java as a core
and uses it to encode diagnostic data. The use
of Java allows for seamless interconnection and
data transfer between the different components of
the web based quality system and the robots. The
Web based control chart can be automatically used
to send diagnostic data and commands to on-line
rejection of defective parts through Internet
based robots.
- Application Server
- The application server is a communications
program written in Java - Receives measurement data from the camera through
a TCP/IP connection - Makes quality decision based on this data
- Instructs the robot through a Telnet connection
over TCP/IP to perform the appropriate pickup and
place task based on the decision - Exchanges all this information with the user
interface through a TCP/IP connection
- User Interface
- User interface implemented through a Java Applet
and can be viewed through a web browser - Applet served by the Apache web server
- Applet receives information about the ongoing
manufacturing process from the application server
and displays it to the user
Objective
The project aims to develop an Internet based
quality control system for manufacturing through
a combination of Internet enabled industrial
devices. The final outcome is to enable the
quality control personal to receive quality
information on the ongoing manufacturing process
at a remote location over the Internet.
Web-based E-quality Control System
SYSTEM ARCHITECTURE
SYSTEM DESCRIPTION
All the subsystems are connected to the Goodwin
Colleges local area network at Drexel
University.
- Cognex DVT 540 Sensor
- Used for making inspections and measurements
- Equipped with Ethernet port and TCP/IP stack for
information exchange - Initially trained to learn the profile and make
measurements on the object being tested through
the - FrameWork software
- Once an object is detected by the ObjectFinder
soft-sensor, measurements are made automatically - through the measurement soft-sensors
- Inspection results reported back to application
server through a TCP/IP connection
SYSTEM SETUP
Student Learning in E-quality Control System
- Yamaha YK 250X SCARA Robot
- Particularly suitable for pick and place or
assembly operations with a high degree of
accuracy - and speed
- Variable speed Dorner 6100 conveyor system is
connected with the robots I/O device ports in - order to synchronize the conveyor with the
motion of the robot - The robots RCX 40 controller is equipped with an
Ethernet card and runs a Telnet daemon for remote
textual command based operation of the robot - Mapping Between Robot Camera Co-ordinates
- Object position has to be mapped from camera
coordinates to robot coordinates to guide the - robot to the correct pickup position.
Statistical Process Control Chart for CCD