PPT On WEB BASED MANUFACTURING
Download
WEB BASED MANUFACTURING Presentation Transcript:
1.WEB BASED MANUFACTURING
2.INTRODUCTION
With the advent of the World Wide Web (www), information distributed at different location can be accessed and shared by users anywhere in the world using Web tools such as Web-browsers.
The Web technologies have been applied widely in developing manufacturing systems such as marketing, design, process planning, production, customer service etc. distributed at different locations into an integrated environment.
3.WHY WEB BASED MANUFACTURING?
Capturing global audience
The users of a manufacturing system can be in any part of the world and therefore it is vital that the system should be widely acceptable.
The web based manufacturing instead of developing customized client - server architecture depends on well defined and seasoned client-server architecture running on the internet, which is the www, to serve application logic in the form of Java applets, which provide platform independent means of accessing the system
4.HANDLING DATA LOSS AND OUT OF ORDER DELIVERY OF DATA:
When the web has been chosen as platform for development of the system, it should be noted that the application layer of web, HTTP runs over the transport layer protocol, TCP which provides reliable (connection-oriented) in order byte stream data transfer takes care of the problem associated with data loss and out of order delivery of data.
COORDINATING MULTI-USER ACCESS
The nature of operation of some operation in mfg. system such as drilling is such that only one client should have full control over the drilling machine at any given time. Due to this restriction, coordination of multi-user access is vital in ensuring fairness of use and safe operation of the machining unit.
5.REDUCED SUSCEPTIBILITY TO TEMPORAL COMMUNICATION DELAYS:
An important consequence of deciding against real time direct control of the machining unit is that susceptibility of the proposed system’s performance is reduced, thus addressing the uncertain time delay problem
6.FRAMEWORK OF WEB BASED MANUFACTURING
7.Web pages embedded with JAVA applets provide an interface for the operations. Using the web interface, the authorized remote clients (first tier) provide machining parameters which are relayed to the web server.
The machining parameters upon reaching the server (middle tier) constitute a part-program which is stored in a job file scheduled for execution of machining process
The machining operation is monitored by the network camera, which is a part of the middle tier providing real time feedback to the remote user.
8.In addressing security issues pertaining to the web based manufacturing system, the firewall is the first line of defense in restricting unauthorized access to the server and therefore the drilling machine
In addition to this, the web server authenticates users prior to granting permission to submit jobs, monitor the machining process or participate in virtual discussion
Finally all the sensitive communication between the client and the server is carried over TLS (Transport Layer Security) thereby ensuring confidentiality, data integrity and server authentication
9.MODULAR ARCHITECTURE OF THE WEB BASED MANUFACTURING SYSTEM
10.JOB SUBMISSION
The process of job submission requires coordinated interaction between the client and the server. On the client side is a JAVA applets responsible for reading and validating input machining parameters prior to encoding and sending it over to the server
The web server receives the machining parameters posted via CGI, sets up necessary environment variables and executes the CGI script responsible for storing machining parameters in a job file, adding the job file to the scheduling system and then notifying the machine controller about the presence of the job file in the queue.
Finally the user is informed about the status of the job submission by means of a job ID uniquely identifying their job.
