Sensor based PLC programming for a discrete event control system
In the manufacturing industry, automation in material handling has increased the
overall profitability of the product with an improvement in the quality and
productivity of the system. This is primarily due to two reasons. First, automation
reduces the total production cycle time, and second, it helps smooth flow of raw
materials and finished products to their desired location with little or no human
interference. But, such an implementation involves several problems. One
significant problem is the location of sensors that perceive the system environment.
A correct choice of sensors at precise locations enables the controller to collect the
required information and take a suitable decision that makes the system more robust.
Moreover, the sensor logic is vital to control the system.
This thesis addresses the sensor placement and control logic issues in an automated
material handling system that was developed by The Providence Group, Applied
Technology (TPGAT) at Knoxville, Tennessee. The proposed design prevents
deadlock and controller jamming. This is achieved by a suitable control on the
occurrence of events in the system. This solution also allows the controller to take
decisions for the smooth movement of material. In addition, recommendations for
an overall improvement in the structural aspects of the system are discussed.
However, additional sensors need to be installed to implement this design. Although
similar systems exist this thesis attempts a cost effective solution.
School:The University of Tennessee at Chattanooga
School Location:USA - Tennessee
Source Type:Master's Thesis
Keywords:tpg applied technology knoxville tenn materials handling
Date of Publication: