Elektriskt system för detektion vid ballistiskt prov

• Main Author: Kiuru, Tobias
• Format: Others
• Language: Swedish
• Published: Linköpings universitet, Institutionen för systemteknik 2004
• Subjects: Electronics; metalldetektering; Elektronik
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2542

The purpose of this thesis was to design an electrical system for use in a ballistic test at the Swedish National laboratory of forensic science (SKL). The detector unit would use four main parts: coilsystem, transmitter, reciever and indicator. The coilsystem would be based on a balanced system using three coils. One that creates a magneticfield and the other two will sense the differences when a metallobject is in the coilsystem. This report starts out by investigating possible solutions for this specific task followed by a description of the physics that the metaldetector use. Then a description of the design of a scaled metaldetector model followed by testing and evalution. The results are then beeing used when the design and testing of the full scale detector. The possible solutions for the transmitter-, reciver- and indicator circuit are then beeing described and also simulated. Last in this report a evalution and suggestions of further improvments are presented.