Design of a smart sensor for load insulation failure detection in DC supply system of UAV

This paper introduces an embedded smart sensor in the DC supply system of an unmanned aerial vehicle (UAV) based on AT89C2051, which can measure load insulation failure in direct current supply system. The measuring principles are analyzed first in this paper and the system design schemes of software and hardware are given out as well. Finally, the measure error has been analyzed and counted. This sensor possesses characteristics of low-cost, low-power consumption, high measurement precision, and high reliability. Practical experiments show that the sensor system, of which the measurement precision achieves 0.01mA, could meet the demands of detection accuracy, achieve the expected criteria of design, and could be spread.