Method of determining optimal detection beam locations using reflective feature mapping

A map of the locations in a volume of space under surveillance, where an object is detected by detecting reflections of at least one sample beam of energy directed into the volume of space by a sensor system located at a reference area, produced by

• (A) placing the object at a predetermined location within the volume of space;
• (B) locating the sensor system at a selected reference area;
• (C) directing at least one sample beam of energy waves from a reference area onto the object within the space;
• (D) detecting the energy reflected back to the reference area from the object;
• (E) recording the reference area and the detection of energy on a map of the space under surveillance;
• (F) relatively moving the sensor system and the object to locate the sensor system at a different selected reference area;
• and
• (G) repeating steps (C), (D), (E) and (F) a predetermined number of times to create said map.

A method for automating the selection of a subset of possible energy beam orientations from a larger set of possible beam orientations for which data has been acquired, comprising the steps of

• (A) compiling a list of sample energy beams in relative order according to the total number of detections of beams reflected from an object within the volume of space under surveillance;
• (B) selecting the beam having the highest number of detections;
• (C) compiling another list of the remaining sample energy beams in relative order according to the total number of detections of beams reflected from an object within the volume of space under surveillance that are non-duplicative of the detections of any selected beam;
• (D) selecting the remaining beam having the highest number of detections that are non-duplicative of the detections of any selected beam;
• and
• (E) repeating steps (B), (C) and (D) a predetermined number of times to produce a combined detectivity map of all detections of all selected beams.

A method of quantifying the performance of a sensor system used to detect the presence of an object in a volume under surveillance, where the object is detected by detecting reflections of at least one sample beam of energy directed into the volume of space by a sensor system, comprising the steps of

• (A) placing the object at a plurality of uniformly spaced locations within the volume;
• (B) directing said at least one of sample beams of energy from the sensor system into the volume;
• (C) recording the detection status of the reflections of the beams on a map of the volume for each of the locations within the volume to determine the number of detections;
• and
• (D) evaluating the number of detections to quantify the performance of a sensor system.

A method of defining a sensing system for detecting the presence of an object vehicle in blind spot of a host vehicle, by determining the optimal placement of a plurality of energy beams which are projected into the blind spot, the reflections of which are detected to detect the presence of the object vehicle, comprising the steps of

• (A) placing the object vehicle at a preselected position within the blind spot;
• (B) directing a plurality of sample beams of energy, which have a predetermined orientation, from a source onto the object vehicle;
• (C) detecting the sample beam energy reflected from points on the object vehicle by energy detectors;
• (D) recording the preselected position of the object vehicle, the predetermined orientation of sample beams, and the detection status of the energy detectors;
• (E) changing the equatorial and azimuthal angles of each of the beams and repeating steps (A) through (D);
• (F) moving the source of the sample beams relative to the object vehicle;
• (G) repeating steps (B) through (F) to produce spatial maps of the locations at which the object vehicle is positioned when each of the energy detectors detect reflected sample beam energy;
• and
• (H) using the spatial maps so produced to select the optimal orientation of a set of energy beams which will maximize the detection probability of an object vehicle located in the blind spot.