FIG. 1 is a top perspective view of a drone detection device showing my new design, FIG. 2 is a bottom perspective view thereof, FIG. 3 is a front elevational view thereof, FIG. 4 is a top plan view thereof, FIG. 5 is a bottom plan view thereof; and, FIG. 6 is a sectioned end face view taken along line A-A with internal mechanism being omitted thereof.