SU1691865A2 - A radiotelegraph operator trainer - Google Patents

Abstract

This invention relates to automation. The purpose of the invention is to improve the accuracy of the assessment of the ability of the operator to detect a signal in the background noise. The device contains Morse stroke shaper 1, sound information presentation block 2, noise generator 3, adjustable attenuator 4, response analysis block 5, pause allocation block 6, operator response input block 7, error counter 8, count 9 number of presentations, block 10 indications. The introduction of the block 11 for determining the optimal localization and the block 12 for dynamic control allows adjusting the time delay of the signals of the sound emitters in block 2 depending on the cycle of errors made by the operator in the process of identifying the presented stimuli. For a given number of correct answers in previous cycles, block 12 reduces the delay until the number of errors increases, and the delay and the signal-to-noise ratio at which this occurred characterize the abilities of the operator. The device according to claim 2 is characterized by the execution of block 12. The device according to p. 3 is characterized by the execution of block 11. The device according to claim 4 is characterized by the execution of block 2. 3 hls files, 4 ill. (Ls

Description

Yu

1

oh oh

s

00

about ate

to

The invention relates to automation, can be used to assess the professional suitability of operators for detecting signals for interference, and is an improvement to the invention by the author. No. 1545237,

The purpose of the invention is to improve the accuracy of the assessment of the ability of the operator to detect a signal in the background noise.

In figure 1 - 4 schematically shows the proposed device.

The device for training wireless telegraphists (Fig. 1) contains the Morse code shaper 1, sound information presentation unit 2, interference generator 3, adjustable attenuator 4, response analysis unit 5, pause highlighting block 7, operator response input block 7, error counter 8 , a counter 9 of the number of presentations, a display unit 10, a block 11 for determining the optimal localization and a block 12 for dynamic control.

Dynamic control unit 12 (Fig. 2) includes trigger 13, first 14, second 20 and third 26 inhibit blocks, first 15, second 21 and third 28 delay blocks, first 17 and second 18 elements OR, first 19, second 23 and third 25 counters, the first 16, the second 22, the third 24 and the fourth 29 And elements and the one-shot 27.

The block 11 for determining the optimal localization (Fig. 3) forms a reversible counter 30, a decoder 31, a block 32 of keys, a block 33 of delay elements and an element OR 34,

The unit 2 for presenting sound information (FIG. 4) comprises a tone frequency generator 35, a key 36, first 37 and second 40 amplifiers, first 38 and second 41 emitters (headphones), and a delay unit 39.

The device operates as follows.

The switches of the former 1 set the characters (letters, numbers) that will be presented to the subject to distinguish against the background noise. After turning on the power, the counters, registers and the distributor are reset, the first output of the trigger 13 accepts a zero potential. When the operator presses the button in block 7, the noise from the generator 3 output goes through block 4 to the second inputs of amplifiers 37 and 40, and a block is displayed on the display of block 10, indicating the signal-to-noise ratio at which the subject distinguishes the Morse code sign sound, In this case, 2.0 is a minimum interference,

The unit potential from the output of the decoder 31 of the block 11 goes to the second (control) input of one of the keys of the block 32.

Simultaneously, the pulse from the output of the block

7 enters the first input of the imager 1, ensuring the extension of the sign from its first output. Binary combination of the sign with - the first output of the driver 1 comes

0 to the first (control) input of the key 36 of the block 2, ensuring the occurrence of the tone frequency from the generator 35, and to the first input of the block 5, to the second input (Ci) of which clock pulses are fed from the second output

5 shaper 1, which write into the register of block 5 the code combination of the character presented to the operator.

From the output of the key 36, the sound image of the Morse code mark goes directly to

0 the first input of the amplifier 37 and the first (informational) inputs of the keys 32 of the block 11. Since there is a single potential at the control input of the key, the signal passes through the key to the input of the delay element

5 of the block 33 and then through the OR element 34 enters the input of the element 39 of the block 2. The delayed signal from the output of the element 39 is fed to the first input of the amplifier 40. At the outputs of the amplifiers 37 and 40, sound images of the signal + disturbance appear, which are fed to the head phones 38 and 41. The signal comes to the phone 38 with a delay equal to the difference in delays of blocks 33 and 39. The listener, having listened to the presented sound image signal + noise, recognizes the signal in it (Morse code sign) and presses the corresponding key on the sensor of block 7 .

If the operator reproduced correctly

0 sign, then at the output of the block 5 adder there is no signal, and if the sign is incorrectly reproduced, an error pulse appears at the output of block 5.

If the operator has ten characters

5 reproduces without error or makes one mistake, then the output of block 9 is an overflow pulse, which enters the installation input of counters 23 and 19 of block 12, confirming that they are in the initial position, and to the second input of the register of block 4, move the unit to second bit

At the same time, the unit potential from the second output of block 4 enters the board

5 of block 10, preparing the flashing of the digit corresponding to a lower signal-to-noise ratio.

The device proceeds to the next cycle, in which the signal is presented against the background of the interference more than the previous one.

If the subject during the presentation of ten characters makes two errors during playback, the signal-to-noise ratio applied to the headphones does not change.

The device proceeds to the next cycle, in which the time shift between the arrival of signals to the headphones is reduced by 10 ms (one step).

If the individual operator's time shift is less than 700 ms, then in this cycle the subject does not make more than one error, the signal / noise ratio decreases to a certain value, for example, 1.0. The appearance in the third cycle of two or more errors causes a pulse from the output of the counter of block 8 to the inputs of counters 25 and 23 reduced by another 10 ms, i.e. 680 ms, and prepares the circuit for display on the delay panel 690.

If the set delay does not correspond to an individual time shift of the operator, the latter in the next cycle allows for more than one error. At the output of the counter 25 of block 12, when a third pulse arrives from the output of the counter of block 8, a unit potential appears that blocks the prohibition block 26, and through the element 24, to the second input of which the unit potential is fed from the second output of counter 23, passes to indicator 10 , highlighting on the scoreboard 1.0 and 690 and signaling the taking of indications.

If an individual operator time shift is 700 ms or more, then immediately after reducing the delay by 10 ms, the subject makes more than one error. The pulse from the output of block 8 is fed to the input of the installation of the counter of block 9, returning it to its original state and leaving the signal-to-noise ratio the same for the next cycle.

The pulse from the output of the element AND 29 through the element OR 17 is fed to the input of the return of the account of the reversible counter 36 by moving the unit potential in the decoder 31 to the left (to the initial position). The delay time increases by 10 ms, and the corresponding value 700 appears on the display 10.

If in the next cycle the operator admits no more than one error (an individual time shift of more than 700 ms), then the pulse from the output of block 9 moves the unit in block 4 by one bit, i.e. In the next cycle, the subject will be presented with information (sound images of signals) with a lower signal-to-noise ratio, and returns counters 23 and 19 to the initial state.

If the operator, after reproducing ten characters, allows more than one error, then the pulse from the output of block 8 provides the appearance at the second output of counter 19 of a single potential, which is fed to the input of indicator 10, highlighting the corresponding digits and signaling 0 readings.

Based on the indications of the scoreboard of unit 10, the ability of the subject to detect signals against the background noise and the optimal time delay for this operator are determined.

Claims (2)

Invention Formula 1, A device for the training of radio telegraphists by auth.St. No. 1545237, characterized in that, in order to improve the accuracy of assessing the ability of an operator to detect a signal against the background noise, an optimal localization determination unit and a dynamic control unit are introduced, the first and second inputs of which 5 are connected respectively to the output of the error counter and to the first output of the counter of the number of presentations, the first, second and third outputs of the dynamic control unit are connected respectively to the first and 0 by the second inputs of the signal localization detection unit and the corresponding input of the display unit, the third input of the optimal localization determination unit is connected to the output of the audible information presentation unit, the third input of which is connected to the first output of the optimal localization detection unit, the second multi-digit output of which is connected to the corresponding inputs Indication unit, 2. The device according to claim 1, characterized in that the dynamic control unit comprises a series-connected trigger, the first block of the prohibition, the first block 5 delays, the first AND element and the first OR element sequentially connected between the output of the first prohibition block and the second input of the first element AND the second OR element and the first counter, the second prohibition block sequentially connected, the second delay unit and the second AND element, the second sequentially connected the counter and the third element And, the output of which is connected to the second input of the first counter, and 5 in series, the third counter, the third block of the prohibition, the one-shot and the third delay block, the output of which is connected to the second inputs of the first and second OR elements and the first trigger input, and the fourth AND element included between the output of the third block and the third input of the first element OR, the first input of the second block is connected to the second output of the trigger, the first input of the second counter and the input of the third counter are connected to the output of the second block, the second output of the second counter is connected to the second input The second element And the second input of the third element And is connected to the output of the third counter, the second input of the fourth element And is connected to the output of the second block of the ban, the combined second inputs of the first and second blocks of the ban form The first input of the dynamic control unit, the second input of which is the combined second input of the second counter and the third input of the first counter, and the first, second and third outputs of the dynamic control block are respectively the outputs of the second AND element, the first OR element and the third AND element, 3, the device according to claim 1, characterized in that the block for determining the optimal localization contains successively the reversible counter, the decoder, the key block, the delay block and the OR element are turned on, while the forward and reverse inputs of the reversible counter form the first and second inputs of the optimal localization definition block, the third input of which is the combined second inputs of all keys of the key block, the element OR output is the first output of the optimal localization determination unit, the second multi-bit output of which is the decoder outputs. 4, the device according to claim 1, characterized in that the unit for presenting audio information comprises a sequentially connected tone frequency generator, a key, a first amplifier and a first radiator, a series-connected delay unit, a second amplifier and a second radiator, while the second key input, the combined second inputs of the amplifiers and the input of the delay unit form the first, second and third inputs of the audio presentation unit, respectively, the output of which is the key output. FM.1 Fig.Z Yy P