SU1094156A1 - Telegraph transmission speed measuring device - Google Patents

Abstract

A DEVICE FOR MEASURING TELEGRAPHIC SPEEDS containing a series-connected pulse shaper, a differentiating element, the first diode, the anode of which is connected to the cathode of the second diode, the first trigger, the first key, the second input of which is connected to the output of the pulse generator, the first counter and the first decoder, control input which is connected to the input of the second decoder, serially connected the first divider, the input of which is connected to the input of the first counter, the time setting element, the third decryptor p and indicator, the second and third inputs of which are connected to the outputs of the first and second decoders, respectively; the second counter, the first input and the first output of which are connected respectively to the first and second inputs of the third decoder, the second key, the second and third triggers, the third and fourth counters, characterized by the fact that, in order to improve the accuracy of measurements, an inverter, first and second zapokmnan units, second, third and fourth dividers, first, second, third, fourth and fifth And elements and modulo adder are entered into it two, while the output of the pulse driver is connected to the input of the inverter, the output of which is connected to the first input of the second key, to the first input of the third element And and to the first inputs of the second and first elements and the second inputs of which are connected respectively to the first and second outputs of the second trigger, the input of which is connected to the anode of the second diode and to the input of the second divider, the output of which is connected to the first inputs of the first and second storage units whose second inputs are connected to the outputs of the first and second, respectively And elements, the outputs of the first and second memory blocks are connected respectively to (L second and third inputs of the third element And whose output is connected to the input of the third trigger and the first input of the fourth element And, the second input of which is connected to the first output of the third trigger, the second output which is connected to the first input of the fifth element And, the second input of which is connected to the output x of the modulo two adder, the first input of which through the fourth counter is connected to the output of the fourth element And, the third input of which Connected with the output of the first key and the SP input of the third divider, the output of which 05 is connected to the second input of the second key, the output of which is connected to the first input of the third counter, the second input and the output of which are connected respectively to the input of the first trigger and to the second input of the modulo two and the output of the fifth element And through the fourth divider is connected to the second input of the second counter, the output of which is connected to the input of the second decoder.

Description

The invention relates to telecommunications and can be used in simulators for the training of radio telegraph operators and in measuring radio installations. It is known a device for measuring the speed of wiring, which contains a pulse shaper, the output of which through a differentiating element is connected to the anode of the first diode whose cathode is connected to the input of the triggering trigger, the output of which is connected to the first input of the first key, the second input of which is connected to the output of the pulse generator, and during turn connected to the input of the first counter, the output of which is connected to the first input of the first decoder, the output of which is connected to the first input of the indicator, the second input of which is connected with the output of the second decoder, the control input of which is combined with the control input of the first decoder ij. The disadvantage of this device is the low measurement accuracy. Haul, which is close to the invention by its technical nature, is a device for measuring the speed of wiring, which contains successively connected pulse shaper, a differentiating element, the first diode, the anode of which is connected to the cathode of the second diode, the first three ger, the first key, the second input of which is connected with the output of the pulse generator, the first counter and the first decoder, the control input of which is connected to the input of the second decoder, connected in series by the first divider, whose input is connected to the input m of the first counter, the time of the element, the third decoder and the indicator, the second and third inputs of which are connected to the outputs of the first and second decoders respectively, the second counter, the first input and the first output of which are connected respectively to the first and second inputs of the third decoder, the second key, second and third triggers, third and fourth counters 2. However, the known device has a very high accuracy of the telegraph speed, since the pulses to the input of the second flip-flop arrive simultaneously, which causes the comparison element to be compared each time for the duration of only two consecutive pauses of the original signal, and the output signal of the reference element will be equal. If one of these pauses is a pause between elements of a sign, and a friend is between signs (or groups). In addition, the comparison element behaves unpredictably if there is a pause between signs and a pause between groups, the duration of which may vary, taking into account the instability of the radio telegraphists, approximately two times. The purpose of the invention is to improve the accuracy of measuring the speed of wiring. The goal is achieved by the fact that in the mouth. An instrument for measuring the speed of cabling containing a pulse generator connected in series, a differentiating element, the first deed, the anode of which is connected to the cathode of the second diode, the first trigger, the first key, the second input of which is connected to the output of the pulse generator, the first counter and the first decoder, the control input which is connected to the input of the second decoder, serially connected the first divider, the input of which is connected to the input of the first counter, the time setting element, the third decoder and Icator, the second and third inputs of which are connected to the outputs of the first and second decoders, respectively, the second counter, the first input and the first output of which are connected respectively to the first and second inputs of the third decoder, the second key, the second and third triggers, the third and fourth counters, entered the inverter , the first and second blocks of memory, the second, third and fourth dividers, the first, second, third, fourth and fifth elements And And the modulo two, while the output of the pulse shaper is connected to the input of the inverter, clod It is expensively connected to the first input of the second key, to the first input of the third element I and to the primary inputs of the second and first elements I, the second inputs of which are connected respectively to the first and second outputs of the second trigger, the input of which is connected to the anode of the second diode and to the input of the second divider whose output is connected to the first inputs of the first and second storage units, the second inputs of which are connected to the outputs of the first and second elements I, respectively, the outputs of the first and second storage units are connected respectively but with the second and third inputs of the third element And, the output of which is connected to the input of the third trigger and the first input of the fourth element And, the second input of which is connected to the first output of the third trigger, the second output of which is connected to the first input of the fifth element And, the second input connected to the output of an adder modulo two, the first input of which is connected through the fourth counter to the output of the fourth element I, the third input of which is connected to the silo input of the first key and to the input of the third divider, the output of which is connected to the second input of the second key, the output of which is connected to the first input of the third counter, the second input and output of which are connected respectively to the input of the first three geers and the second input of the modulo two, and the output of the fifth element And through the fourth divider is connected to the second input counter, the output of which is connected to the input of the second decoder. FIG. 1 shows the structural electrical circuit of the proposed device; in fig. 2 - time diagrams for the device operation. The device contains a pulse shaper 1, a differentiation element 2, the first and second diodes 3 and 4, the inverter 5, the first element Ib, the first memory block 7, the railing divider 8, the pulse generator 9, the first key 10, the first and second triggers 11 and 12 , the second element And 13, the second block 14 memory, the third element And 15, the second divider 16, the second key 17, the first counter 18, the adder 19 modulo two, the fourth element And 20, the second counter 21, FIVE4 element And 22, the third trigger 23, third counter 24, first decoder 25, indicator 26, second decoder 27, third d The helper 28, the fourth counter 29, the fourth divider 30, the time of the spans element 31, the third decoder 32. The device works as follows. The signals of the telegraph source are fed to the input of the pulse generator 1. The pulse shaper 1 generates positive pulses, the duration of which is determined by the signal source (Fig. 2a) The pulses from the output of the pulse shaper 1 are fed to differentiating element 2, from which pulses go to the first and second diodes 3 and 4. Through the first diode 3 they pass impulses corresponding to the end of the pause in the original telegraph signal, through the second diode 4 passes the impulses, corresponding to the beginning of the pause (Fig. 26 and 2b, respectively). The telegraph operator's work, puts the first trigger 11 into the open state. The potential at the output of the first trigger 11 permits the passage of the pulses of the generator 9 pulses through the first key 10 to the first and third dividers 8 and 28 and to the first counter 18 "Pulses from the output of the pulse forming device 1 passes in addition, to the input of the inverter 5, which generates positive pulses in the interval of time corresponding to the pauses of the original telegraph signal (fig.2g) The positive potential from the output of the inverter 5 allows the passage of pulses from the third divider 28 through the second key 17 to the third counter 24, which zeroes after the end of the pause of the original signal with pulses from the output of the first diode (Fig. 2ij). The contents of the third counter 24 corresponds to the duration of the next pause of the original signal. The first, second, third and fourth elements are And 6, 13, 15, 20, the second divider 16, the first and second memory blocks 7 and 14, the second and third triggers 12 and 23, the fourth counter 29 perform the function of single pause selection. A single pause is distinguished from the three successive pauses of the original signal. This makes it possible to take into account signs consisting of one point or one dash, i.e. when successively two pauses between signs or between groups and signs arrive at the device. At the initial moment, let the second trigger 12 be in such a state that its potential is zero at the first output and a single potential at the second. The first pulse from the second diode 4 enters the input of the second trigger 12 and changes its state. The potential from the first output of the second trigger 12 permits the passage of a positive pulse, corresponding to the first pause in the source signal, from the output of the inverter 5 through the first element 6 to the first memory block 7. The second pulse from the second diode 4 transfers the second trigger 12 to the initial state, and the positive pulse corresponding to the second pause from the output of the inverter 5 passes through the second element. And 13. The pulse diagrams at the first output of the second trigger 12 and at the outputs of the first and second elements And 6 and 13 are shown in FIG. 2e, 2jK, 2z, respectively. The second divider 16 has a factor of 3 division, therefore the third pulse from the output of the second diode 4 (Fig. 2i) reads information from the first and second blocks 7 and 14 of the memory, which goes to the third element I 15. It also passes a positive pulse from the output inverter 5, corresponding to the third pause of the original signal. At the output of the third element And 15 we get a pulse.

the duration of which is equal to the duration of the minimum pause from the first three in the composition of the message transmitted by the tele-telegraph operator (Fig. 2fc). Taking into account the introduced assumption, the duration of this pulse is equal to the duration of a single pause corresponding to the handwriting of this radio telegraphist.

If in the initial state, at the first output of the second trigger 12, there is a single potential, and at the second, it is zero, the minimum pause is made similarly, with the only difference that the pulse corresponding to 11C1y of the first pause is recorded in the second block 14 of the recorded 15 mipapi, the second is in the first block 7 of memorization.

In the initial state at the first output of the third flip-flop 23 is a single potential (Fig. 2e), therefore the pulse from the output of the third element 15 permits the passage of the pulses of the generator 9 pulses through the first key 10 and the fourth element 20 to the fourth counter 29 (Fig. 2w). The content of 25 fourth counter 29 corresponds to the duration of a single pause. The rear edge of the pulse from the output of the third element And 15 translates the third trigger 23 into the opposite state (Fig. 2), thus completing the work of isolating a single pause and allowing the pulses from the output of adder 19 to modulo two through the fifth element And 22 to The fourth divider 30 with the Fifth element of AND 22 is needed to prevent false operation of the device until a single pause is allocated.

Modulo 19 modulo two emits a pulse whenever the content of the third counter 24 becomes equal to the content of the fourth counter 29. The division factor of the third divider 28 is 2, so the 1-gu single pause is compared in duration to the pause, the duration of which is 45 two times exceeds the pause duration of the original signal, which allows to take into account instabilities in the operation of the radio telegraph operator. If the duration of the next pause is two or more times longer than the duration of a single one, it is considered that this pause is a pause between signs or between groups.

The fourth divider 30 has a division factor of 5 and an impulse will appear at its output anytime the wireless telegrapher transmits to a group of five characters. These pulses are summed by the second counter 21. After the transmission of the five groups on the fifth section of the second counter 21, an impulse will appear, the inputs to the inputs of the first and second decoders 25 and 27, and the time taken to transmit five will be displayed on the indicator 26. groups, and the number of transferred groups.

At the end of each minute, the output of the time of the master element appears, an impulse appears that affects the control input of the third decoder 32, and the indicator 26 displays the number of groups transmitted by the student per minute, i.e. transmission speed in groups per minute. At the same time, the same impulse. stitched the second counter 21, counting the number of groups (Fig. 2n), preparing it for further work.

The entire device is reset to the reset circuit by pressing the corresponding button (the diagram is not shown).

The technical and economic efficiency of the device for measuring the speed of wiring consists in increasing the accuracy, which will make it possible to make more reliable and operational control over the work of radio telegraphists for transmission during periods of training, preparation for the work of diplomatic radio telegraphists, conducting competitions and passing control standards.

1

2

Claims (1)

DEVICE FOR MEASURING TELEGRAPHING SPEED, comprising a pulse shaper, a differentiating element, a first diode, the anode of which is connected to the cathode of the second diode, a first trigger, a first key, the second input of which is connected to the output of the pulse generator, the first counter and the first decoder, the control input of which connected to the input of the second decoder, a first divider connected in series, the input of which is connected to the input of the first counter, a timing element, a third decoder and an indie ator, the second and third inputs of which are connected to the outputs of the first and second decoders, the second counter, the first input and the first output of which are connected respectively to the first and second inputs of the third decoder, the second key, the second and third triggers, the third and fourth counters, differing in order to increase the accuracy of the measurements, an inverter, the first and second memory blocks, the second, third and fourth dividers, the first, second, third, fourth and fifth elements And and the adder modulo two are introduced into it, while you the pulse shaper is connected to the inverter input, the output of which is connected to the first input of the second key, to the first input of the third element And and to the first inputs of the second and first elements and, the second inputs of which are connected respectively to the first and second outputs of the second trigger, the input of which is connected to the anode of the second diode and to the input of the second divider, whose output is connected to the first inputs of the first and second blocks zapominaniyavtorye inputs are connected to outputs of the first and second aND trav- _with n da of the first and second memory blocks <S knowledge are connected respectively to the second and third inputs of the third element And, the output of which is connected to the input of the third trigger and the first input of the fourth element And, the second input of which is connected to the first S output of the third trigger, the second · whose output is connected to the first input of the fifth element And, the second input of which is connected to the output of the adder modulo two, the first input of which through the fourth counter is connected to the output of the fourth element And, the third input of which is connected to the output of the first and with the input of the third divider, the output of which is connected to the second input of the second key, the output of which is connected to the first input of the third counter, the second input and output of which are connected respectively to the input of the first trigger and to the second input of the adder modulo two, and the output of the fifth element And through the fourth divider is connected to the second input of the second counter, the output of which is connected to the input of the second decoder.