ALTEC Automated Gang Lock Final Presentation Presented By Randy Turner Michael Thompson Justin Rutledge Ben Mize Drew Mardis Richard Moyer The Automated Gang Lock The system uses a heavy duty 45 pound force solenoid The system fits in the narrowest boxes The mechanism fits in a single box protecting it from impact and corrosion The module can be welded bolted or riveted in place Can use mounting brackets or can be mounted directlyto the box by the housing Please wait while we open Windows Media Player A car door style latch is employed to lock the bar in place These latches are mass produced and can be bought for 5 dollars in large quantities A rack and pinion design was explored An appropriate motor cost as much as the solenoid in the final design The rack and pinion design also increased complexity and part count Manual override must be locked out An access panel can lock out the mechanism directly Alternatively a release mechanism can be keyed to the outside Rivet Strength Calculations Tensile Strength under moment force 314lbs FOS 2 Tensile Strength 1780 lbs FOS 2 Shear Strength 2600 lbs FOS 2 Spring force calculations Item Coefficient of Friction Weight Friction Force Deflection 3 06 lbs Spring Tension Initial Tension Tension 1 Deflection Greased Bar 0 251 12 252 3 06 lbs 0 103 2 54 lbs 7 58 lbs Resistive Force On Solenoid 5 6 lbs 10 64 lbs Force From Solenoid 16 6 lbs 45 lbs Spring Cost Estimation Articles shown in gray are conservative estimates The wireless controller is simple to integrate into the system No wiring takes place inside the box after assembly Wires can be run along with the lights The receiver is specifically designed to work on 12VDC automobile power Wireless modules cannot work inside closed metal boxes Wireless signals cannot transmit through a conductive metal cage Faraday Cage Effect The receiver can be placed outside the box An antenna could be run to the outside of the box The box itself can be made to act as an antenna Wiring Wiring the system is relatively straight forward Each solenoid requires a relay to protect the wireless unit and to function reliably Conclusions Cost Estimate 45 per box in parts 35 estimate labor costs per box Final Estimated Cost for 3 box truck 320 Design uses mostly inexpensive manufactured parts Can be installed in boxes large and small The automated system
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