RANGE-FINDING METHOD Russian patent published in 2012 - IPC G01C3/08 G01S17/08 

FIELD: physics.

SUBSTANCE: method involves generating a time-setting clock sequence of pulses with period T, generating and transmitting to a target a probe signal S₀(t,t₀) with duration t_s>T, whose shape corresponds to the sequence of its sampled values S_0i of the array {S_0i}; receiving the reflected signal S(t,t_D), digitisation thereof and determining the time position relative the probe signal, wherein t is the current time, t₀ is the time when the probe signal is emitted, t_D is the time when the reflected signal is received, i=1…K is the sampling order of the probe signal S_0i, K=t_s/T is the number of samples of the probe signal, j=1…J_max is the sampling order of the received signal S_j, J_max=2D_max/cT is the number of samples of the received signal, D_max is the maximum measured range, c is the speed of light. The arrays {S_0i} and {S_j} are compared by generating numbers 1≤p≤J_max, arrays {S_jP}={S_p-1+i} are generated and is determined. The value R_min(p) is selected, the value p(R_min)=P is determined and range D=cPT/2 is calculated. The array {S_0i} is obtained by pre-digitisation of the probe signal. The target is probed N≥1 times. Sampled values of the received signal are generated in form of a sum of sampled values obtained during each probe, where m is the probing index number.

EFFECT: high accuracy of range-finding.

4 dwg