Design Document forTarget Capture SystemSubmitted to:Professor Joseph PiconeECE 4512: Senior Design IDepartment of Electrical and Computer EngineeringMississippi State UniversityMississippi State, Mississippi 39762April 30, 2002Submitted by:Heath Causey <[email protected]>Nobu Fuji <[email protected]>Renae Webb <[email protected]>Josh Wooten <[email protected]>Faculty Advisor: Dr. Robert Reese <[email protected]>Department of Electrical and Computer EngineeringMississippi State UniversityBox 9571Mississippi State, Mississippi 39762EXECUTIVE SUMMARY3.5. SOFTWARE DEVELOPMENT3.5.1 Device:3.5.2 Palm Pilot OS Software Development Environment3.5.4 Serial Port Communication Systems on Palm Pilot OS3.5.5 Palm Pilot OS Serial Port Communication Data ProtocolFigure 3.15. PC and Palm Pilot OS Interfacing3.5.6 Error Checking Bytes4. TESTING SPECIFICATIONS4.4 Shot Simulation for Palm DevelopmentShot Simulation for Palm DevelopmentTarget Capture Design Document forTarget Capture SystemSubmitted to:Professor Joseph PiconeECE 4512: Senior Design IDepartment of Electrical and Computer EngineeringMississippi State UniversityMississippi State, Mississippi 39762April 30, 2002Submitted by:Heath Causey <[email protected]>Nobu Fuji <[email protected]>ECE 4512 February 11, 2002DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERINGTarget Capture Renae Webb <[email protected]> Josh Wooten <[email protected]>Faculty Advisor: Dr. Robert Reese <[email protected]>Department of Electrical and Computer EngineeringMississippi State UniversityBox 9571Mississippi State, Mississippi 39762ECE 4512 February 11, 2002Target Capture EXECUTIVE SUMMARYIn today’s society time management has become a priority of most people. Many people enjoyshooting rifles but do not have time to practice target shooting. Walking to the target consumesmost of the time spent at the rifle range. The Target Capture System will display the target andbullet strike position to the shooter. With the use of this system, shooters will be able toeliminate unproductive time while sighting in rifles. A conveniently located target display willbe viewable from the shooters location. Accessibility of target information will allow the shooterto remain in their position for extended periods.Several design constraints will exist during the construction of this system. The rifle shooter willrequire accurate target information. Our system will be able to determine the location of a bulletstrike within 0.5 inches of the actual location. Computer graphics will be required to display thetarget to the user. A Personal Digital Assistant (Palm Pilot OS) was chosen because of the units’inexpensive price, compact size, and battery life. The Palm Pilot OS software will accuratelyrepresent the bullet strike position in reference to the target. Cost of the parts for the TargetCapture System should be less than $150, which makes the system affordable to most shootingenthusiasts. The system will consist of a collapsible shooting stand, an electrical component boxat the target, and an electrical component box at the shooting station. The target stand should becollapsible and functional for a wide range of shooting environments. The battery life of thesystem should be substantial for several one-hour visits to the shooting range. Electrical boxeslocated at the target and at the shooters location should operate using 9-volt batteries for at leastfour hours. The system is implemented by utilizing the leading edge of the shock wave from the bullet. Theshock wave will be sensed using an array of microphones. Once the wave has been detected, thesignal will be amplified to 5V TTL logic with the use of operational amplifiers and comparators.The 5V TTL logic will be sent through a differentiator to filter out any low frequency producedin the surrounding environment. This logic will then be read by a microprocessor, whichdetermines the order of the sound wave arrival times at each microphone. A microprocessordetermines the difference of the shock wave arrival time of each microphone from the triggermicrophone. Bullet position will be determined by triangulation calculation using these timedifferences. Time differences will be sent from the Target Base Station to the Shooter BaseStation via wireless RF communication. A Personal Digital Assistant will plug into a serial portof the Shooter Base Station for accessibility of the time differences. System software will thenbe used to compute the appropriate calculations for displaying a graphical location of the bulletstrike on the target to the shooter.Simple setup and accurate target information will make the Target Capture System a necessityfor all rifle shooters. With the increasing abundance of Palm Pilot OS users, the Target CaptureSystem will be the most convenient method to determine bullet strike positions. At an affordableprice, the shooter can reclaim lost time on the shooting range. There are over 2000 shootingranges affiliated with the National Rifle Association. Each rifle range is a potential consumer.Since our Target Capture System is geared to shooter enthusiast, the demand of such a systemhas great potential. When comparing prices of products used to view targets at the shootingrange, the Target Capture System is an affordable product.ECE 4512 February 11, 2002Target Capture TABLE OF CONTENTSABSTRACT…………………………………………………………………1. PROBLEM……………………………………………………………..2. OBJECTIVE……………………………………………………...........2.1. Resolution…………………………………………………………..2.2. Wireless Data Link…………………………………………………2.3. Graphical Representation…………………………………………..2.4. Position Coordinates, Order, and Number of Bullet Strikes……….2.5. Bullet Velocity……………………………………………………...2.6. Bullet Strike Velocity………………………………………………2.7.
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