Method and apparatus for determining the accuracy of projectiles fired at a target

Claim 1

AN APPARATUS FOR DETERMINING THE HITS OR MISSING DISTANCES, RESPECTIVELY, OF PROJECTILES FIRED AT A TARGET WHICH COMPRISES (A) MEANS IN THE TARGET FOR TRANSMITTING ELECTROMAGNETIC RADIATIONS IN AT LEAST TWO FREQUENCIES, (B) MEANS IN THE TARGET FOR RECEIVING THE RADIATIONS, AFTER REFLECTION FROM A PROJECTILE, WITH A FREQUENCY SHIFT CORRESPONDING TO THE VELOCITY OF THE PROJECTILE AS A RESULT OF THE DOPPLER EFFECT, (C) MEANS FOR FORMING DIFFERENTIAL FREQUENCIES IN THE RECEIVERS FROM FREQUENCIES TRANSMITTED DIRECTLY THERETO BY THE TRANSMITTERS AND FROM COORDINATE REFLECTED FREQUENCIES, (D) MEANS FOR DETERMINING THE PHASE DIFFERENCE BETWEEN THE DIFFERENTIAL FREQUENCIES, AND (E) MEANS FOR CONVERTING SAID PHASE DIFFERENCE INTO A VALUE REPRESENTATIVE OF THE DISTANCE OF THE PROJECTILE FROM THE TARGET, THE LATTER MEANS INCLUDING PHASE-TRUE LIMITER AMPLIFIER MEANS FOR CONVERTING THE DIFFERENTIAL FREQUENCIES GAINED DUE TO THE DOPPLER EFFECT INTO SQUARE-TOPPED PLUSED AND PHASE DISCRIMINATOR MEANS FOR COMPARING THE POSITION OF ZERO PASSAGE OF THE SQUARE-TOPPED PULSE SEQUENCE AND TRANSFORMING THE PHASE SHIFT, CORRESPONDING TO THE DISTANCE OFF THE PROJECTILE, INTO FURTHER SQUARE-TOPPED PULSES OF CORRESPONDING DURATION.

Claim 2

AN APPARATUS FOR DETERMINING THE HITS OR MISSING DISTANCES, RESPECTIVELY, OF PROJECTILES FIRED AT A TARGET WHICH COMPRISES (A) MEANS IN THE TARGET FOR TRANSMITTING ELECTROMAGNETIC RADIATIONS IN AT LEAST TWO FREQUENCIES, (B) MEANS IN THE TARGET FOR RECEIVING THE RADIATIONS, AFTER REFLECTION FROM A PROJECTILE, WITH A FREQUENCY SHIFT CORRESPONDING TO THE VELOCITY OF THE PROJECTILE AS A RESULT OF THE DOPPLER EFFECT, (C) MEANS FOR FORMING DIFFERENTIAL FREQUENCIES IN THE RECEIVERS FROM FREQUENCIES TRANSMITTED DIRECTLY THERETO BY THE TRANSMITTERS AND FROM COORDINATE REFLECTED FREQUENCIES, (D) MEANS FOR DETERMINING THE PHASE DIFFERENCE BETWEEN THE DIFFERENTIAL FREQUENCIES, AND (E) MEANS FOR CONVERTING SAID PHASE DIFFERENCE INTO A VALUE REPRESENTATIVE OF THE DISTANCE OF THE PROJECTILE FROM THE TARGET, THE LATTER MEANS INCLUDING PHASE-TRUE LIMITER AMPLIFIER MEANS FOR CONVERTING THE DIFFERENTIAL FREQUENCIES GAINED DUE TO THE DOPPLER EFFECT INTO SQUARE-TOPPED PLUSED AND PHASE DISCRIMINATOR MEANS FOR COMPARING THE POSITION OF ZERO PASSAGE OF THE SQUARE-TOPPED PULSE SEQUENCE AND TRANSFORMING THE PHASE SHIFT, CORRESPONDING TO THE DISTANCE OFF THE PROJECTILE, INTO FURTHER SQUARE-TOPPED PULSES OF CORRESPONDING DURATION.