Chandima Perera Jeremy Brown Xiangyu Sun Brianne Luff.
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Transcript of Chandima Perera Jeremy Brown Xiangyu Sun Brianne Luff.
Chandima Perera
Jeremy Brown
Xiangyu Sun
Brianne Luff
In The BeginningIn The Beginning
• Identified Opportunity… – The lifting properties of certain types of
modern cranes pose a safety hazard if guidelines are not adhered to.
Design ConceptDesign Concept
• Solution… – To create a safety system to ensure the safe
operation of today’s modern cranes.
– This system would guarantee that the crane load is in accordance with the load chart.
– This in return will assure that no unnecessary crane accidents arise due to excessive loads.
Crane Load Failsafe SystemCrane Load Failsafe System
What and Who Benefits?
• Ensures safety to operators and people in the crane operating vicinity.
• US studied reported 22 deaths in the US from 1984-94 due to overloading.
• Reduces the risk of collateral damage.• The crane itself.• Assets surrounding the crane’s operational area.
Design SpecificationDesign Specification
• Model crane was built to simulate actual crane operations.
• Weight and boom angle measurements are taken by PIC.
• The PIC calculates the maximum load at the corresponding boom angle. It then controls the hoist and boom angle motors.
Instrumentation ComponentsInstrumentation Components
Two Geared DC Motors PotentiometerLoad Cell (0-10lb)
16F877 PIC Board
Instrumentation Amplifier
Model Crane DesignModel Crane Design
Electrical DesignElectrical Design
Coding FlowchartCoding Flowchart
Model Load ChartModel Load Chart
Demonstration VideoDemonstration Video
Problems EncounteredProblems Encountered
• Instrumentation– Noise from instrumentation– Overshooting in reverse boom direction– Calibration of load cell– Insuring safety protocols during operation
• Mechanical– Clearance issues in brackets and boom– Difficulty machining Plexiglas– Mounting pulleys– Installation of potentiometer
Future Design ConsiderationsFuture Design Considerations
• Load cell or instrumentation amplifier with a more stable signal.
• Emergency system override
• Audio/Visual warning alarms prior to motor shutdown
• Max load display for corresponding boom angle
ConclusionConclusion
• The Crane Failsafe System is a success!
• The team was able to apply our knowledge obtained from this course to create a functioning prototype with added features.
• We believe this System may have industry potential in crane safety.
Any Question?Any Question?