초록 ▼

A passive electro-optical range and total velocity measuring system having first and second cameras positioned along a common baseline. Control systems activate the first and second cameras at a first instance to capture a target image of a target at location T1and at a second instance to capture a

A passive electro-optical range and total velocity measuring system having first and second cameras positioned along a common baseline. Control systems activate the first and second cameras at a first instance to capture a target image of a target at location T1and at a second instance to capture a target image of the target at location T2. A range computer calculates ranges from the first camera, the second camera, and a baseline midpoint to a target at location T1and location T2. An angles computer calculates target displacement. A velocity computer calculates total total target velocity, track velocity, and cross-track velocity. The present invention also includes a method for measuring the range and total velocity of a target using a passive electro-optical system.

대표청구항 ▼

1. A method for measuring the range and total velocity of a target using a passive electro-optical system oriented along a line of sight (LOS) axis, said system including first and second image acquisition devices positioned along a common baseline perpendicular to said LOS, said method comprising t

1. A method for measuring the range and total velocity of a target using a passive electro-optical system oriented along a line of sight (LOS) axis, said system including first and second image acquisition devices positioned along a common baseline perpendicular to said LOS, said method comprising the steps of: (a) activating said first image acquisition device at a first instance t1to capture a target image of a target at location T1and at a second instance t2to capture a target image of said target at location T2; (b) activating said second image acquisition device at said first instance t1to capture a target image of said target at location T1and at said second instance t2to capture a target image of said target at location T2; (c) calculating ranges from said first image acquisition device to said target at location T1and location T2; (d) calculating ranges from said second image acquisition device to said target at location T1and location T2; (e) calculating a target displacement vector δRby performing the following steps: (i) defining a triangle A between said first image acquisition device, T1,and T2; (ii) defining a triangle B between said second image acquisition device, T1and T2; (iii) solving triangle A to find δRA,a first approximate distance between T1and T2; (iv) solving triangle B to find δRB,a second approximate distance between T1and T2; and (v) averaging δRAand δRBto find a substantially accurate δRusing the formula: δR=(δRA+δRB)/2); and (f) calculating total target velocity V. 2. The method of claim 1, further comprising the step of calculating velocity components parallel to and perpendicular to the LOS, respectively. 3. The method of claim 1, further comprising the step of implementing steps (a)-(f) using at least one software program implemented by at least one computer. 4. The method of claim 1 wherein said step of calculating total target velocity V includes the step of solving the equation: V=δR/(t2-t1).