SU571767A1 - Device for measuring frequency increment of electric signals - Google Patents

Description

one

The imagery of fires to ectro-emissive technology and between them should be used in measuring systems with frequency sensors.

A device for measuring the frequency np is known, which is a tracking filter l.

A disadvantage of this device is the limitations imposed on the magnitude of the reference frequency, which reduces the accuracy of operation and reduces the operating frequency.

Closest to the invention of the technical solution & m is a device for measuring the increment of frequencies, a societal high-frequency oscillator, a mixer and an amplifier 2.

This device implements a heterodyning method. Under the conditions of the great differential

The destabilizing factors of the input signal frequency, which should be measured, significantly deviate from the initial range, which reduces the accuracy of operation.

The aim of the invention is

improved measurement accuracy.

Claims (1)

This goal is achieved due to the fact that the device for measuring the increment of frequencies, containing a high frequency generator, the output KOTopoi; o is connected to the pulse input of the valve 1 by the output of the pulse counter connected to the input, the first output of which is connected to the input of the calculator, the mixer, the meter for measuring the interval, and the amplifier, equipped with two electronic switches, a dividing circuit and a control divider. The signal input of the frequency divider is connected to the high frequency generator output, the input controlfflH is connected to the second output of the counter, and the pin to the first input of the mixer, the second input I of which is connected to the first output of the first key, the output to the first input of the separation circuit. The second input of this circuit is connected with the output of the first key, and the output - with the input of the measuring interval generator, j, the outputs of which through the second key are connected to the potential input of ven. Tala; The amplifier output is connected to the input of the first key; The structural electrical circuit of the device is pre-described in the drawing. The device consists of a high frequency generator 1, an amplifier 2, electronic switches 3, 4, separation circuit 5, a measuring interval 6, a mixer 7, a ventilation 8, a controlled divider 9 pulse frequency, a pulse counter U, and a calculator 11, Device Devices in the following way. The key 3 is set to the first position at which the signal of the frequency F is fed through the amplifier 2, the key 3 and the circuit 5 to the input of the driver b. An impulse with a duration different from one or one frequency frequency, F, is fed from the first output of the former 6 cheg-oz key 4 to the potential input of the valve 8. After passing through the valve 8 a packet of pulses of the clock signal F. —generator 1 is input to the counter U, Code numbers pa, for ksannogo on the counter Yu, sets the coefficient with which divider 9 divides generator 4acT.TjTy I ,,. The signal on the output of divider 9 has a frequency that is approximately equal to the frequency F.j. Ueira control divider 9 is pre-installed in such a way that & The frequency g of the signal at its output differed from the frequency F by several d & Hz hertz. After setting the division factor, the key 3, 4 is set to the second position. At the same time, the signal from iacTOToJt k is fed to the second input of the mixer 7. The simas imsKOg clock f- from the output of the mixer 7 through ccseu-Gu 5 is fed to the input of the front end c. An impulse with a duration equal to час2 periods of the clock-wave F j comes through the key 4 to the input of the valve 8, as a result of which the input of the counter 10 arrives t pa of the impulses frequency F | The digital code of the calculation is stored in the computation of the ellam 11. After you have obtained the correct value / I of the p - p - 2. The cat-ora is also memorized, the calculator 11 finds the difference uf., Af –D f The device provides a constant measurement accuracy under the conditions of a great variety of temperatures and,.: other destabilizing factors. There is no overlap on the reference frequency, and the operating frequency of the local oscillator is automatically selected as a result of calibration, which improves the measurement accuracy. Apparatus of the Invention A device for measuring the increment of frequencies of electrical signals comprising a high-frequency generator, the output of which is connected to an impeller's internal input, an output connected to an input by means of an input, the first output which is connected to an input of a calculator, a mixer, a shaper of an interval and An amplifier, characterized in that, in order to increase accuracy, it is equipped with two electronic switches, a dividing circuit and a controllable divider often, the signal input is connected to the generator output high frequency, control input with second M OUT 1; rticher, and output with nepBbJM mixer input, the second input of which is connected to the first output of the first key, the output to the first input of the separation circuit, the second input connected to the BT output and the first key, and an output with an inlet of the measuring device of the dimensional injector, whose outputs through the second key are connected with the special input of the valve, and the output of the driver is connected with the input of the first key, EAST-OCHULAR information taken into account. Masha at examination: 1 “Radar-location devices 5 and ed., Grigorin R bova, N ,, Sov. Radio, 1970.4 ,, 397. 2, Bogdanov N “V, Automagic H3 viepe nie chast-ot, M ,,,, Voenizddet, 1962, p. 72