The development of a device to detect explosives and other materials on the underside of a Vehicle
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Abstract
The purposes of this research were 1) to create and develop a device to detect explosives and other materials on the underside of a vehicle; and 2) to assess user satisfaction levels. The subjects consisted of 20 staff from Buengkan Border Patrol Officials. The sample was selected using purposive sampling. The instruments used for this experiment were as follows: 1) the materials detector; 2) an effectiveness record form used to record the effectiveness of the detector; and 3) a questionnaire was used to assess user satisfaction levels towards the constructed detector. The percentage, mean, and standard deviation of the questionnaire scores was used to assess the user satisfactions towards the constructed detector. However, The research results were as follows: 1) A CCD camera can image the underside of a car and displays in 3 ways a) A 7-inches LCD TV screen where a staff used the detector b) An 18-inches screen used to see the image remotely via transmission to a receiver at a frequency of 2.4 GHz, and c) A 4.5-inch - Smart Phone screen. The image signals display clearly. The image resolution was700 TVL, the sharpness of the image was 1.3 million pixels. The photo sensitivity 0 LUX /F1.2, produced infrared light up to 30 meters away. The camera was able to send a signal to a screen up to 150 meters away. Continuous usage in case of power outage or usage up to 5 hours in areas with no available power supply, both night and day, and link to Internet system. This system has the ability to send images of ongoing inspections to multiple viewers; and 2) the overall user satisfaction level towards using the detector was at highest when analyzed in 3 parts. All parts were at the highest level. In chronological order: usage, working and design
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