SU517865A1 - Digital range error meter - Google Patents

Description

one

The invention is responsive to radio engineering and can be used in radar-tracking systems of autonacing in range.

A pythonic distance error meter is known, containing a code converter in a time interval, the first output of which is connected to the first input of the pulse distributor, and the second output is connected simultaneously to the second input of the pulse distributor and the first input of the quantizer, the second input of which is connected to the source of the support pair, and the output is connected to the interconnection including the 1st decoder of the error code and the averaging unit, with the outputs of the distributor the pulses are connected simultaneously with the inputs of the sign trigger and the decoder of the error code.

The purpose of the invention is to improve the accuracy of measuring the distance error. In the described meter, this is achieved by additionally introducing an adder, the first input of which is connected to an external source of the range code, and the output is connected to the input of the code converter in the time interval, and a counter of scale shift pulses, the input of which is connected to the source of probed signals, and the outputs are connected simultaneously to the second input of the adder and

the second input of the code decoder mismatch.

The drawing shows a block diagram of the described digital meter.

It contains the converter 1 of the code in the medium e1; sing interval, the first output of which is connected to the first input of the distributor PMP 2, and the second output is connected simultaneously with the second input of the distributor HMiv.ibcon 2 and the first input of the quantizer 3, the second input of which is associated with the source signal The third input is connected to an on-off voltage source, and the output is connected to a serially connected airframe 4 mismatch code on the unit averaging 5, trigger sign 6, adder 7, the first input of which is connected to an external source of the distance code spine, and an output connected to an input transducer 1, the code in the time interval counter 8 and the scale shift pulses, the input of which the source soedinep zondiruyush, their signals, and outputs podklyuchepy odpovremenno to the second input of the adder 7 and a second input of the decoder 4 mismatch code. The outputs of the pulse distributor 2 are connected simultaneously with the inputs of the trigger of the sign 6 and the decoder 4 of the error code.

Before starting work, the extra-distant value of the D-range code from the external distance code code is fed to the input of the adder 7, the second input of which receives the code from the output of the counter 8 of the scale shift pulses.

Counter code 8 is the result of counting the pulses preceding the radar pulses of the radar station and sent from the source to their signals.

Counter 8 periodically overflows through every pulse, where n is the number of bits of counter 8.

After the summation of both codes in adder 7, the inverse sum code is recorded in the counter of the converter 1 of the code in the time interval, the operation of which begins with the arrival of the "Start" applied to the input of converter 1, which is tightly synchronized with the probe, by its radar pulse. The output impulse of converter 1, which determines the start of the strobe in range, triggers pulse distributor 2, for which additional pulses of code converter 1 are used as clock pulses in a time interval. The pulse distributor 2 provides a predetermined strobe width in range (the first half of the pulses form the first half-gate, the second .- the second flash gate). The duration, t, of additional pulses of converter 1, arriving at their quantizer 3, is equal to the minimum quantization step of converter 1, which is determined by the minimum discreteness of quantization of the python error meter in range. The repetition period T of additional pulses of the converter 1 is less than or equal to the pulse duration of the signal supplied to the second input of quantizer 3 from the signal source, and at the level of the reference voltage Wop supplied to the third input of quantizer 3 from the source of the reference pair. In this case, during the arrival of the impulse of a sigial to the quaptizer 3, it coincides within the strobe as far as at least one additional impulse of the transducer 1.

Duration t p the repetition period of 7 additional impulses of the transducer 1 cwy ratio.

From the output of the quantizer 3, the normalized pulses are fed to the input of the decoder 4 of the error code, at the inputs of which a parallel code of the instantaneous error value ADj appears in the distance D.

The magnitude of the mismatch code depends on the pulse pulse distributor pulse number 2, during which the pulse of the signal coincides with the scale of the additional pulses of the converter 1, and on the position of the scale of the additional pulses of the converter 1 relative to the probe pulse, which is set by the counter 8 pulses of the scale shift.

The occurrence of a signal pulse during the first half-gate means a negative mismatch code value, and the trigger 6 is set to a minus position, and the occurrence of a signal pulse during the second half-bar indicates a positive mismatch code value, and the trigger 6 sign is set to a positive position.

Before the next sounding begins, another pulse arrives in the counter 8 of the scale pulses, as a result of which the counter code 8 increases by one unit. Since the extrapolated value of the range code D remains unchanged in this case, the code value at the output of the adder 7 becomes one more than in the previous sounding. As a result, ie, this scale of additional impulses of transducer 1 and output impulse of transducer 1 are shifted by one quantization sampling duration t. In this case, due to the coincidence of the signal pulse with the additional pulse of converter i and the outputs of the decoder 4, a new value of the TO error code appears, -.

The shift of the scale of the additional pulses of the converter 1 by the magnitude magnitude is carried out each period of the radar sounding, while the output of the decoder 4 is a new value of the error code D / ,.

The entire measurement cycle is a sounding period, and then the process repeats.

By averaging the obtained instantaneous values of D /, the averaging unit finds the center of gravity of the measured signal pulse.

F o rm} l and inventions

A digital distance error meter containing a code converter in a time interval, the first output of which is connected to the first input of the pulse distributor, and the second output is connected simultaneously to the second input of the pulse distributor and the first input of the quantizer, the second input is connected to the source of the reference voltage, and the output is connected to the series-connected decoder of the error code and the block a. m, and the outputs of the distributor are pulse s are connected simultaneously with the inputs of the trigger of the sign and the decoder of the mismatch code, characterized in that, in order to improve the accuracy of measuring the mismatch by distance, an adder is added to it, the first input of which is connected to the external source of the remote code, and the output is connected to the input of the code converter in the time interval, and the counter pulse shift of the scale, the input of which is connected to the source of probe signals, and the outputs are connected simultaneously to the second input of the adder and the second input of the code decoder mismatch.