Survy of Methods and Techniques for Metal Detection

A physical protection system (PPS) integrates people, procedures, and equipment for the protection of assets or facilities against theft, sabotage, or other malevolent human attacks. The design of an effective PPS requires a methodical approach in which the designer weighs the objectives of the PPS against available resources, and then evaluates the proposed design to determine how well it meets the objectives. Many techniques have been used to detect the weapons and metal in different medium. The work propose the advantage and disadvantages of the methods.