Method and device for determining an operational geographical zone observed by a sensor

A determination method for determining at least one operational geographical zone in a region of interest, said zone being determined relative to a sensor configured to observe and measure the radial speed of an object traveling at a non-zero minimum speed “VT” in the region of interest, the method comprising:

• a step of simulating the position of said sensor in said region of interest at a position and in an orientation that are determined;
• a step of determining at least one first zone of said region of interest that is constituted by points for each of which, said object at said point and traveling at a speed greater than or equal to said speed VT and in a given direction “DT”, would be seen from said sensor to have a radial speed greater than a threshold value defined for that point;
• and
• a step of determining a second zone of said region of interest, the second zone constituting a coverage zone of said sensor in which said object is observable while taking account at least of the intrinsic characteristics of said sensor and of the intrinsic characteristics of said object, and also of the position of said object relative to said sensor;
• said at least one operational geographical zone being defined by taking account of the intersection between at least said first and second zones.

A method of assisting in installing a sensor configured to observe and measure a radial speed of an object traveling at a non-zero minimum speed “VT” and in at least one given direction “DT” in a region of interest, the method comprising:

• at least one iteration, each iteration comprising determining an operational geographical zone of said sensor by simulating said sensor being positioned in said region of interest at a determined position and in a determined orientation, by performing a method of determining such a zone in accordance with claim 1;
• a step of determining at least one preferred position among said positions enabling an optimized operational geographical zone to be determined in accordance with an optimization criterion;
• and
• a step of reproducing said at least one preferred position.

A device for determining at least one operational geographical zone in a region of interest, said zone being determined relative to a sensor configured to observe and measure the radial speed of an object traveling at a non-zero minimum speed “VT” in the region of interest, the device comprising:

• a unit for simulating said sensor being positioned in said region of interest at a determined position and in a determined orientation;
• a unit for determining at least one first zone of said region of interest that is constituted by points at each of which, said object at said point and traveling at a speed greater than or equal to said speed VT and in a given direction “DT”, would be seen by said sensor to have a radial speed greater than a threshold speed defined for that point;
• and
• a unit for determining a second zone of said region of interest, the second zone constituting a coverage zone of said sensor in which said object is observable while taking account at least of the intrinsic characteristics of said sensor and of the intrinsic characteristics of said object, and also of the position of said object relative to said sensor;
• said at least one operational geographical zone being defined by taking account of the intersection of at least said first and second zones.