SU1239619A1 - Counting-type electronic frequency meter - Google Patents

Abstract

The invention can be used to measure the rate of change of frequency. The purpose of the invention is to increase the speed of the frequency 3 pa. The device contains a time selector 1, a counter 2, registers 3 and 10 of memory, an indicator 4, a block 5 of frequency dividers, a driver of 6 strobe pulses, a driver of 7 rewriting pulses and a driver of reset pulses. Introduction to the device of the imaging unit 9 of the pulses of the installation and the counter 11 performed by the subtractive with the presetting makes it possible not to interrupt the measurement process while indicating the result of the previous measurement. . 1 3.p. f-ly. 2 Il. W с: tS9 со со 05 СО Phi & .1

Description

"1239619

the invention relates to the radio source d 5 with the age of

measuring technique and can be used to measure the rate of change of frequency.

The purpose of the invention is to increase the speed of the electron-counting frequency meter.

FIG. 1 shows a functional diagram of the electron-counting frequency counter; Fig, 2 - plot output signals of its blocks.

The device contains a time selector 1, counter 2, register 3. Memory, indicator 4., block 5 frequency dividers, driver 6 strobe pulses, driver 7 rewriting pulses, driver 8 reset pulses, driver 9 setting pulses, additional register 10 of memory , additional counter 11.

The first input of the time selector 1 receives a continuous sequence of pulses of the measured frequency.

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the second input of the time selector is connected to the output of the strobe pulse generator 6. The output of the time selector 1 is connected to the counting input of counter 2 and the counting input of the additional counter 11. The bits of the bits of the counter 11 are of the memory register 3 are connected to the inputs of the indicator 4, the bits of the bits of the counter 2 are through the additional register of memory 10 The bits of the additional counter 11 are located at the output of the imager 6 strobe pulses connected to the input of the imager 7 rewriting pulses, the output of which is connected to the control inputs of the 3 memory register and the additional register 10 memory and to the input bodies 9 pulses installation. The output of the imaging unit 9 pulses of the installation is connected to the installation input of the additional counter 11 and the input of the imaging unit 8 reset pulses. The output of the block 5 frequency dividers is connected to the first input of the driver 6 strobe pulses. The output of the resetting device 8 is connected to the second input of the forming device 6 strobe pulses, to the input of the 5 frequency divider unit and to the zeroing input of the counter 2, the signal of the reference frequency to the second input of the 5 frequency divider unit.

The device works with l edukitsim. in a way.

In the initial state after the impact of the reset pulse (Fig. 2nd), the counter 2 and the gate driver 6 are in the zero state, and the block 5 of the frequency dividers is in the initial state. The signal of the measured frequency is fed to the input of the time selector 1 controlled by the gate driver 6. The signal of the reference frequency f through the block 5 frequency dividers

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arrives at the input of the pulse shaper b, which opens the selector 1 for the counting time t. (Fig. 2q, S). A burst of pulses (Fig. 2e) is removed from the output of the selector 1 and fed to counters 2 and 11. At the end of the strobe pulse, the formers 7.9 and -8 are started in succession (Figs. 2, -d, 3). Output signal

 the latter (Fig. 2 a) sets the block 5, the strobe pulse generator 6 and the counting dial 2 to the initial state and the measurement cycle is repeated. Counter - 2 counts the pulses arriving at its counting input in the forward mode. An additional counter 11 counts the pulses arriving at its counting input in the opposite direction from some advance

0 of the set number, expressed in the binary-decimal code 8-4-2-1. At the end of each strobe, counter 2 contains the number of pulses corresponding to the current value of the frequency f, expressed in the binary-decimal code 8-4-2-1. This value of the frequency of the overwrite pulse signal from the generator 7 is rewritten into register 10 of the additional memory, In addition:; the counter 11c with the end of the strobe contains the number of pulses corresponding to the frequency change over time

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those.

value of -f, +

expressed in code 8-4-2-1. This frequency change information after the impact of the rewrite pulse (Fig. 2-1) is transmitted to memory register 3 and is indicated by the indicator

50 4. On the signal: a setting pulse, which is formed after the end of the overwrite pulse (Fig. 2 / g) and is fed to the input of the installation of the additional counter: 11, into the counter 11

55 the state of memory cells of register 10 corresponding to the value of frequency f1 is entered in code 8-4-2-1, and with the beginning of a new strobe the counting of pulses

comes from this value. At the end of the strobe in counter 11 there will remain the number of pulses corresponding to the change in f, ff + z in counter 2 (and then in register 10) - the value of the frequency f ;. . Due to the sequential start of 8, B, -g, Q, I (Fig. 2), the formation of the strobe pulses proceeds uninterruptedly, successively one after the other, and the blocks 1,2,5-11 provide an automatic continuous measurement of the rate of change of the frequency iV (c storing and indicating the difference uf at each subsequent time in the memory register 3 and indicator 4, respectively.

Thus, in the proposed device, the measurement process is not interrupted during the display of the result of the previous measurement, which increases its speed.

Claims (2)

1. Electronic counter frequency meter, containing a series of frequency dividers, a pulse shaper from the tomb, a time selector, a counter, and a dubbing pulse shaper, the output of which is connected to the control of the memory register input, the output of which is connected to the indicator input, a shaper of the reset pulses, connected to the zeroing input of the counter, the input of the frequency divider unit and the second input of the strobe pulse former, characterized in that, in order to improve speed, a pulse former has been introduced into it In the installation, an additional memory register and an additional counter, in which the counting input is connected to the output of the time selector, the setup input is connected to the output of the pulse generator of the installation, and the bits of the additional counter are connected to the outputs of the additional memory register, whose inputs connected to the outputs of the bits, the counter, while the outputs of the bits of the additional counter are connected to the inputs of the memory register, and the output of the overwriting pulse former is connected to the control input additionally of the register memory and the input of the pulse shaper installation, whose output is connected to the input of the reset pulse, the pulse shaper dubbing input coupled to the output of the strobe pulses. 2. Frequency meter according to claim 1, that is, that the additional counter is filled with the subtractive with the preliminary setting. FIG. 2