SU1659976A1 - Device to determine pulse middle position - Google Patents

Abstract

The invention relates to a pulse technique and can be used to determine the position of the midpoint of a pulse in radar, television measurement technology, biomedical measurements. The aim of the invention is to improve the accuracy of measuring the position of the center of the pulse relative to the reference pulse. The goal is achieved by the fact that switches 3, 4 are introduced into the device. Bus 7 is a reference signal. The device also contains a reference frequency generator 1, trigger 2, counter 5. input bus 6, output buses 8. 2 or

Description

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The invention relates to a pulse technique and can be used to determine the position of the midpoint of a pulse in radar, television measurement equipment, and medical measurements.

The aim of the invention is to improve the accuracy of measuring the position of the center of the pulse relative to the reference pulse.

FIG. 1 shows a block diagram of the device; in fig. 2 shows a temporary diagram of the operation of the device.

A device for determining the position of the midpoint of the pulse (Fig. 1) contains a frequency generator 1, a trigger 2, switches 3,4, a counter 5, an input signal bus 6, a reference signal bus 7, output buses 8. An input signal bus 6 is connected to the first input trigger 2 and the third inputs of switches 3.4, the output of the frequency generator 1 is connected to the second input of switch 3 and the first input of switch 4, the output of which is connected to the second input of counter 5, the output of the first bit of which is connected to the second input of switch 4, fourth input which It is connected to the output of trigger 2 and the fourth input of switch 3, the output of which is connected to the first input of counter 5, the installation input of which is connected to the reference signal bus 7 and the second input of trigger 2, the discharge outputs of counter 5 are device output buses 8, the first input switch 3 is connected to a source of zero logic level.

The device works as follows.

The reference pulse (0, Fig. 2) is fed through bus 7 to the second input of trigger 2 and the installation input of counter 5 and sets them to their initial state.

At the same time, the control inputs of the switches 3.4 provide signals allowing the passage of the signal from the first input of each switch to its output. Since the first input of the switch 3 is supplied with a logic level O, then the first input (input of the least significant bit) of counter 5 does not receive reference frequency pulses, pulses with frequency f of the reference frequency generator 1 are received through the first input of switch 4 to the second input of counter 5. With the transition of the pulse of the object (I0, Fig. 2) on the bus 6 to

The control inputs of the switches 3, 4 are given signals that allow the passage of the signal from the second input of each switch to its output. That is, pulses

the reference frequency f from the generator 1 through the second input of the switch 3 arrives at the first input of the counter 5. On the falling edge of the object pulse, the trigger 2 switches to the opposite state and its output signal bolts the passage of the pulses of the reference frequency of the generator 1 through the switches 3, 4 to both inputs . Thus, in counter 5, a code will be recorded on the position of the midpoint of the object’s pulse relative to the reference pulse.

The operation of the device is described by an expression like

, ti + f .. where xc is the number of pulses counted by counter 5;

ti - the time interval from the reference pulse to the leading edge of the pulse of the object:

At is the pulse duration of the object;

f is the frequency of the pulse generator 1.

Claims (1)

The invention The device for determining the position of the middle of the pulse containing the bus an input signal, a reference frequency generator, a trigger, a counter, the discharge outputs of which are output devices of the device, characterized in that, in order to increase the measurement accuracy, it introduced two switches and a reference signal bus connected to the second trigger input and the installation input of the initial state of the counter, the first input of which is connected to the output of the first switch, the first input of which is connected to the logic zero bus, the output of the reference generator, frequency is connected to the second input of the first switch and the first input of the second switch, the output of which connected to the second counter input, the output of the first bit of which is connected to the second input of the second switch, the third input of which is connected to the third input of the first switch, to the input signal bus and to the first trigger input, the output of which is connected to the fourth inputs of the first and second switches. FIG. 2