Crane Safety Systems Chandima Perera Jeremy Brown Xiangyu

Crane Safety Systems Chandima Perera Jeremy Brown Xiangyu Sun Brianne Luff

In The Beginning • Identified Opportunity… – The lifting properties of certain types of modern cranes pose a safety hazard if guidelines are not adhered to.

Design 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 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 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 Components Two Geared DC Motors Load Cell (0 -10 lb) Potentiometer 16 F 877 PIC Board Instrumentation Amplifier

Model Crane Design

Electrical Design

Coding Flowchart

Model Load Chart 1400 Load vs Boom Angle 1200 Load (g) 1000 800 600 400 200 0 90 80 70 60 50 40 30 Boom Angle (Degrees) 20 10 0

Demonstration Video

Problems 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 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

Conclusion • 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?