SU394722A1 - DEVICE OF ADMISSION FREQUENCY CONTROL - Google Patents

Description

The invention of the invention of the method of measuring the frequency and frequency can be used, in particular, to control the frequency of the conversion of teti and apa meg-h astto.

There are known devices for admissible control of frequency: astrotes, soda / rzzhayuschie converter of controlled frequency in a proportional number of pulses, the output of which ov zai with the inputs of the threshold elements, curtailed. logging through the lo | -uic scheme by the recorder; the threshold elements are summing counters, the threshold of which is determined by their P1 preliminary filling, and the logic circuit is executed on coincidence circuits, the inputs of which are associated with the threshold elements, and the outputs are output to the recorder.

The device is equipped with a controllable switch, which, for the time of preliminary filling off, disconnects the threshold elements of their connection with the logic circuit.

The proposed tolerance control device differs from those known in that the prefilling inputs of the counter are connected via valves, which are removed by the prefilling code | Ne, with the output of the counter connected to the frequency output recorder of the specified tolerance, and the outputs of the latter are connected to the y; mi

This simplifies the Scheme and increases its reliability.

On Ch1M1tezhe; 1Image of the block diagram of the proposed device, consisting of 1, from the converter / controlled frequency to the proportional number of Imiulsov, contained; its S.u. cosyadepi 2, on one of the inputs of which is fed a signal from the sensor 3 reference Interval standards, threshold element 4, performed on a pulse counter, a group of peptides 5, a registrar 6, containing its summing counter 7 with single-ary coding and pointers.

The monitored frequency signal / d is converted by the converter / into a proportional number .Vi, of pulses that go to counter 4. Before measuring, the corresponding C-.Vj difference code is written to the corresponding inputs -4, used as a register, Where:

с - counter capacity,

0

..UZ - the number of pulses. corresponding to its limit.

There are three cases.

The output of counter 4 does not receive ia pulses of counter 7, which will remain in the initial state corresponding to the position "1 in its first bit. The unit level from this bit goes to pointer 8 "Below and A,: V ,,

where L2 is the number of pulses corresponding to the upper limit.

The ogetician 4 will be overfilled with a pulse from its output, which through valves 5 will take out-of the nporpaiMMiHoro device (not according to the order; in the diagram) to this counter-to the binary parallel code paiSiHocTH

C (N, -N,).

In a number of cases of practical verification, the output of the counter 4 in the cepp is 5 — the input of the group of 5 groups is set to delayed (LZ), not punished according to the scheme, with the parameter

N) s s

/Max

Where:

t „is the duration of the counting pulse,

t, c, - run time "I in the counter 4,

Ts - time delay in LZ,

/ maize - the maximum value of the “controlled frequency,

T-ii. -time zn.nenn code nredvaritel-Hoix) zagul-nen in Counter 4.

If,, LZ is not necessary.

The -1muls retransfer of counter 4 is fed to the input of counter 7, moving the unit code to the second bit. The unit level of the second bit trigger goes to pointer 9 “Goal, en.

III L, L.

(Pchetchnk 4 will be the second time, and the second time) And with a single counter, 4 will move

four

to slIe p, s counter 7 to the third discharge account | 1ka /. R. mdnnny level trigger third pa, pe and da.stunast on pointer W "Above.

At the end of p, 1-1kl, a pulse is emitted from the microprocessor device, which returns the circuit to the initial state.

The proposed |) device can be used to control the frequency of various transducers i ar and meter-frequency, having a s / p-channel, that: K and NI-ney-ny10 depends on the frequency of 1-1 on the monitored parameter. The nonlinearity of the frequency dependency — from the size of the parameter is checked at programming and within the limits. ACCURACY n-1: the device is determined by the value of the hall-1 1 and time intervals.

PREMLETS

A tolerant frequency control device containing a controlled frequency converter in: proportional to the number of pulses, a summing counter, which is a threshold electrical element, and a recorder of the frequency output iH3 output tolerance, including indicators, characterized in that , for the purpose of simpler; neither -circuits and amplification, inputs of the prefixing of the counter hours-of-valve, controlled by the code of the pre-triggered, are connected to the output of the counter, connected to the frequency output recorder from the setpoint -ioj-o tolerance and the exits of the last one are connected to the L-Kazatel-mi.