design and construction of mobile surveillance robot

Session 4Ccircuits. This low battery indicator consists of twotransistors and an LED, which will turn on at a specifiedvoltage. The indicated voltage is set to allow enough powerto keep the speed controllers in operation and return theMSR to the user. The LED for the motor subsystem isvisible to the camera so the operator of the device knows tobring the MSR back for recharging and data collection.CONCLUSIONFIGURE 9MOTOR SUBSYSTEM CIRCUITThe physical design of the robot allows for the fourbatteries to be positioned in the lower half of the middlesection. This assists in the self-righting ability of the ball.Sufficient distance was maintained between the batteries andthe motors to prevent interference with electromagneticfields. This is important to the operational performance ofthe robot and prevents the lithium polymer batteries fromlosing the ability to recharge.The second system is designed to power the datacollection unit. Only one battery is needed for the powerrequirements over 10 minutes. A transistor acts as a switchto protect the batteries from using all of their charge. Thecircuit for the camera subsystem is shown below in Figure10.In this project, several alternative designs were consideredand compared based on their ability to meet the requirementsestablished by the design team. The requirements werecreated in order to assure that the robot was able to becontrolled wirelessly from another location without line ofsight, provide live video feedback, and have at least tenminutes of full operational capabilities. Other criteriaconsidered in the comparison of the design alternatives werestability, cost, durability, power consumption, feasibility,mobility, manufacturability, size, and surveillance clarity. Itwas concluded that a dual tread capsule shape design wouldbest fulfill these requirements established by the designteam. Once this design was chosen the eight-student designteam divided the design into four subsystems to better utilizethe specialties of each team member. The subsystemsconsisted of a mechanical subsystem, created by the fourmechanical engineering students on the design team, acontrol and a data acquisition subsystem, both created by thetwo computer engineering students on the design team, and apower subsystem created by the two electrical engineeringstudents.REFERENCES[1] Perterdewnl. "Balbot." YouTube. 20 June 2007. Web. 11 Oct. 2009..[2] Rusil. "Spherical Autonomic Robot S.A.R." YouTube. 28 June 2006.Web. 11 Oct. 2009. .FIGURE 10CAMERA SUBSYSTEM CIRCUITA manual three way switch is present in order toconnect to the separate charging circuits for each subsystem.This will isolate the rest of circuit during the chargingprocess. A low battery indicator is also present in both[3] Palmisano. "Cyclone RC Robot Kit." YouTube. 20 Apr. 2008. Web. 11Oct. 2009. .[4] "B-230013-12A Spec Doc." Portescap. A Danaher Motion Company.Web. 8 Feb. 2010. hhttp://www.portescap.com/BrushlessSlottedDC>.[5] Drivers Ed Guide Instruction Manual for All Castle Creations Car andTruck Brushless Power Systems. Castle Creations, 2009. Print.Pittsburgh, PA March 26 - 27, 2010ASEE North Central Sectional Conference4C-6