Analog to logical system for range measurements incorporating a radar

Claim 2

An analogue to digital system for detecting the range of a target at some predetermined distance for use with a continuously emitting radar, comprising: first and second flip-flops connected to the receiver of said radar, each being responsive to a different voltage level of the signal received by said radar receiver; said first and second flip-flops having known low triggering voltage thresholds; pulse counting means operative to start a count responsive to the output of said first flip-flop and to stop said count responsive to the output of said second flip-flop; trigger means connected to said radar receiver for transforming the pulses of said signal into shaped pulses for input into said counting means; and reckoning logic circuit means including means connected to said radar receiver and responsive to said received signal for producing a signal corresponding to the range of said target, said reckoning logic circuit means being responsive to the final output count of said counting means to operate on and compare said final output count of said counting means and said signal corresponding to the range of said target to provide an indication when the distance between said radar and said target corresponds to said predetermined distance.

Claim 3

An analogue to digital system for detecting the range of a target at some predetermined distance for use with a continuously emitting radar, comprising: first and second flip-flops connected to the receiver of said radar, each being responsive to a different voltage level of the signal received by said radar receiver; said first and second flip-flops having known low triggering voltage thresholds; pulse counting means operative to start a count responsive to the output of said first flip-flop and to stop said count responsive to the output of said second flip-flop; trigger means connected to said radar receiver for transforming the pulses of said signal into shaped pulses for input into said counting means; and reckoning logic circuit means connected to the output of said counting means for indicating when the distance between said radar and said target corresponds to said predetermined distance including: i. analogue means connected to said radar receiver for producing an analogue voltage corresponding to the range of said target, ii. an analogue to digital converter connected to said analogue means to convert said analogue voltage to a digital equivalent, iii. means connected to the output of said counting means to raise the count output to the fourth power, and iv. comparator means operatively connected to said last mentioned means and said converter for comparing their respective outputs to give an output indication corresponding to the distance between said radar and said target.

Claim 4

An analogue to digital system for detecting the range of a target at some predetermined distance for use with a continuously emitting radar, comprising: first and second flip-flops connected to the receiver of said radar, each being responsive to a different voltage level of the signal received by said radar receiver; said first and second flip-flops having known low triggering voltage thresholds; pulse counting means operative to start a count responsive to the output of said first flip-flop and to stop said count responsive to the output of said second flip-flop; trigger means connected to said radar receiver for transforming the pulses of said signal into shaped pulses for input into said counting means; and reckoning logic circuit means connected to the output of said counting means for indicating when the distance between said radar and said target corresponds to said predetermined distance including: i. analogue means connected to said radar receiver for producing an analogue voltage corresponding to the range of said target, ii. an analogue to digital converter connected to said analogue means to convert said analogue voltage to a digital equivalent, iii. means connected to the output of said counting means to raise the count output to the fourth power, and iv. comparator means operatively connected to said last mentioned means and said converter for comparing their respective outputs to give an output indication corresponding to the distance between said radar and said target.

Claim 5

An analogue to digital system for detecting the range of a target at some predetermined distance for use with a continuously emitting radar, comprising: first and second flip-flops connected to the receiver of said radar, each being responsive to a different voltage level of the signal received by said radar receiver; said first and second flip-flops having known low triggering voltage thresholds; pulse counting means operative to start a count responsive to the output of said first flip-flop and to stop said count responsive to the output of said second flip-flop; trigger means connected to said radar receiver for transforming the pulses of said signal into shaped pulses for input into said counting means; and reckoning logic circuit means responsive to said counting means for indicating when the distance BETWEEN said radar and said target correspond to said predetermined distance including: i. a second pulse counting means connected to said trigger means and the one of said flip-flops having the lower threshold for counting the pulses supplied by said trigger means starting the count upon triggering of said last mentioned flip-flop, ii. a comparator connected to said second counting means to receive the output logical count figure from said second counter bit by bit, iii. a binary adder simultaneously responsive to the output count multiplied by a constant coefficient of said first counter and the binary complement of said predetermined range distance measured in numbers of wave lengths of the emitted frequency, and iv. means connecting the output of said binary added to said comparator.

Claim 6

An analogue to digital system for detecting the range of a target at some predetermined distance for use with a continuously emitting radar, comprising: first and second flip-flops connected to the receiver of said radar, each being responsive to a different voltage level of the signal received by said radar receiver; said first and second flip-flops having known low triggering voltage thresholds; pulse counting means operative to start a count responsive to the output of said first flip-flop and to stop said count responsive to the output of said second flip-flop; trigger means connected to said radar receiver for transforming the pulses of said signal into shaped pulses for input into said counting means; and reckoning logic circuit means responsive to said counting means for indicating when the distance BETWEEN said radar and said target correspond to said predetermined distance including: i. a second pulse counting means connected to said trigger means and the one of said flip-flops having the lower threshold for counting the pulses supplied by said trigger means starting the count upon triggering of said last mentioned flip-flop, ii. a comparator connected to said second counting means to receive the output logical count figure from said second counter bit by bit, iii. a binary adder simultaneously responsive to the output count multiplied by a constant coefficient of said first counter and the binary complement of said predetermined range distance measured in numbers of wave lengths of the emitted frequency, and iv. means connecting the output of said binary added to said comparator.

Claim 7

In the system of claim 3 wherein the ratio of the low triggering voltages for said first and second flip-flops are determinative of the constant coefficient of the output count of said first counter and further that said ratio is chosen to define said coefficient as a power of 2 so that binary multiplication is achieved through a mere shifting of the binary bits.