SU1709370A1 - Apparatus to check the work of an operator - Google Patents

Abstract

The invention relates to automation and can be used in systems controlling the functional state of operators, as well as during various psychophysiological studies and professional selection. The purpose of the invention is to expand the didactic capabilities of the device by determining the nature of changes in reaction time when the contrast ratio of stimuli presented by chance is changed. The device comprises a random pulse shaper 1, a key 2, an audio frequency generator 3, a program setting block 4, an indicator 5, an AND element 6. a time stamp generator 7, an operator response input block 8, registers 9 and 10. control blocks 11 and 12, switches 13 and 14, pulse generator 15. comparison unit 16, switch 17 and registration unit 18. The invention provides for a change in contrast when stimuli are presented during the transition from high to low signals and, vice versa, a comparison of the response time and the quantitative determination of their difference. 6 illustrations The invention relates to automation and can be used in control systems of the functional state of operators, as well as in various psychophysiological studies and professional selection. The purpose of the invention is to expand the didactic capabilities of the device by determining the nature of changes in response time when the intensity of the perceived signals changes decrease and increase in the contrast of stimuli presented randomly. Figure 1 shows the structural scheme of the device; Fig. 2 is a functional block diagram of the control unit; fig.Z - the same switch; figure 4 - the same pulse shaper; figure 5 - the same. commutator; Fig. 6 shows timing diagrams for explaining the operation of the device. The device for analyzing sensorial activity contains shaper 1 of a random sequence of pulses, key 2. first generator 3 (audio frequency), block 4 of the control program, indicator 5. element And 6, the second generator 7 (time stamps), the operator response input block 8 (single pulse button), registers 9 and 10. control blocks 11 and 12 (information input and output), switches 13 and 14. pulse shaper 15 , block 16 comparison, comm tator 17 and block 18 of registration. Former 1 contains a generator 19 pseudo-random sequence ^ about th with VJ about

Description

(PSP), a generator of 20 single pulses and trigger 21.

Block 4 includes a counter 22, a decoder 23, and a voltage divider 24.

Indicator 5 comprises amplifier 25, headphones 26, and indication nodes 271-274.

Block 16 includes an adder 28 modulo 2, the first and second elements And 29.30.

Block 18 has counters 31i-3l4 and decoders 321-32.

Block 11 (12) contains prohibition elements 33 and 34, trigger 35, delay elements 36 and element OR 37, and switch 13 (14)

- prohibition elements 38 and AND 39. The shaper 15 pulses contains a counter 40, elements AND 41 and 42, elements 43 and 44 of the delay and the element OR 45.

Switch 17 includes a T-flip-flop 46, prohibition 47. and 48 elements, and And 49.50 elements.

The device works as follows.

Turn on the power. The counters 31.40 are reset, the counter 21 is in the first position, the first output of the decoder 23 is a single potential allowing the voltage to be removed from the output of the divider 24, providing 60 dB at the output of the sound stimulus, head phones 26, triggers 21 and 35 are set to the zero position, trigger 46 is set to the first position (on the first exit

- zero potential).

At the output of generator 19, a pseudo-random sequence appears, the duration of an elementary pulse of which is 2 seconds (Fig. B). The leading edge of the first pulse of the memory bandwidth, which appeared at a random time, will form a single pulse at the output of the generator 20 (fig.bb), which, when it enters the trigger 21, will translate it into a single position (fig.bv). A single potential from the output of the flip-flop 21 is applied to the first inlet of element 6 I, to the second input of which time stamps are supplied from the first output of the generator 7, and to the control input of the key 2, ensuring that the 1000 Hz audio signal passes through its information input to the separator 24 voltage from the output of the generator 3.

The time stamps from the output of the element Ib (fig.bd) through the element 38, to the control input of which zero potential is fed from the first output of the trigger 46 (fig.bg), go to the input of the register 9 and through the element OR 37 to the input C of the register 9 by providing the last, timestamp record.

The tone frequency signal from the output of the voltage divider 24, which is in the first position, is fed through the amplifier 25 to the headphones 26 with an intensity of 60 dB.

The operator, having heard the signal in the headphones 26, presses the button-shaper unit 8, a single pulse from the output of which (fig.be) enters the trigger input

0 21, by transferring it to the zero position and stopping the tone signal to the head phones 26 and recording time marks in the register 9, to the input of the trigger 46, transferring it to the single position - to

5 to the first output of the unit potential (FIG. 6), to the input of the counter 22, transfer the decoder 23 to the second position, providing a decrease in sound intensity when the next tonal signal arrives at

0 output irritant to 55 dB, and through the element 45 OR to the input of the counter 40, writing in it a unit.

The appearance of the next (second) PSP pulse at a random time

5 (fig.b) will carry out the formation at the output of the generator 20 a single pulse (figbb), which will install the trigger 21 in a single position (fig.bv), ensuring the submission of timestamps, through the element 38

0 and the element 39, to the second input of which the unit potential is fed from the first output of the trigger 46 (fig.bg), to the input of the register 10 and through the element OR 37 to the input C of the register 10, the time me5 is recorded in it (fig.bd) .

A sound signal from the output of the generator 3. through the key 2 is fed to the input of the voltage divider 24, the tone signal from the output of which through the amplifier 25 will go to the headphones 26, giving the subject a stimulus, the intensity of which is reduced by 5 dB.

The operator, having heard the signal in the head phones 26, again presses the button-form 5 of the world number 8, a single impulse from whose input (fig.be) arrives at the input of the trigger 21, translate it to zero.e position (fig.bv), stopping the tonal signal to the headphones 26 and recording

0 timestamps in register 10, to the input of counter 40, recording the second unit and ensuring the appearance of an overflow pulse at its output (FIG. Bb). to the input of the trigger 46, throwing it to the zero position

5 (fig.bg) and to the input of the counter 22, translated the decoder 23 to the third position (65 dB).

A single potential from the output of the counter 40 will go to the first input of the element I, 42, ensuring that all the lines are running. via its input clock pulses (Fig.6 h, i) with

the second output of the generator 7, with a frequency of ten times greater than from the first output, the information inputs of the elements 34, whose control inputs are supplied with zero potentials with the output of the flip-flops 35, respectively. The clock pulses from the output of the elements 34, through the elements OR 37 are fed to the inputs C of the registers 9 and 10, by reading the information from their last outputs to the corresponding inputs of the adder 28.

If the response to the first signal (60 db) was faster than the second signal 5 db), i.e. the number of time stamps in register 10 turned out to be more than in register 9, and the outgoing marks (pulses) from the output of adder 28 will pass through AND 30 to the second input of switch 17, go through AND 50, to the second input of which potential potential is given the second output of the trigger 46, to the input of the counter 311, indicating an increase in response time when moving from a loud signal to a quiet one.

If the response to the first signal was slower than the second signal, i.e. the number of time stamps in register 9 turned out to be more than in register 10, then the excess pulses from adder 28 will pass through element 29 to the first input of switch 17, flow through element 47, to the control input of which zero potential is applied from the first output of the trigger 46, to an input of a counter 312 indicating a decrease in response time when moving from a loud signal to a quiet one.

When reading time stamps from the output of registers 9, 10, at the same time, they are written in them.

Let the register 9 recorded less timestamps than in register 10 (Fig.6 C, and). The occurrence of the last mark (pulse) at the last output of register 9 will provide a pulse through the information input of the element 33, to the control input of which the zero potential is fed from the penultimate register 9, to the input of the element 36 whose delay time is equal to the pulse duration.

The delayed pulse from the output of the element 36 is fed to the input of the trigger 35, transferring it to a single position (fig.bk). A single potential from the output of the trigger 35 is applied to the control input of the element 34, stopping the supply of clock pulses to the C input of the register 9, and to the first input of the And 41 element.

The occurrence of the last timestamp at the last output of register 10 will provide a pulse through element 33, to the control input of which is fed zero

the potential from the penultimate output of the register 10, to the input of the element 36. The delayed pulse from the output of the element 36 will go to the input of the trigger 35, transferring it to the single position (fig.bl). A single potential from the output of the trigger 35 is applied to the control input of the element 34, stopping the flow of clock pulses to the C input of the TO register, and to the second input of the And 41 element, ensuring the appearance of a pulse at its output (Fig. 6m).

The pulse from the output of element 41, after 43 delays, goes to the input of element 44, to the input of zeroing the counter 40, setting the latter to its original state, to the inputs of the trigger 35, translating the latter to the zero position, and through the information input of the element 38, to the control the input of which is fed to the zero potential from the first output of the trigger 46, to the reset input of the register 9, setting the latter to the initial state.

The delayed pulse from the output of element 44 will pass through the element OR 45 to the input of the counter 40. Writing one into it.

The appearance at a random time of the next (third) PSP pulse (Fig. 2b) will ensure the filing and recording of time stamps in register 9 and the sound signal to headphones 26 with a volume of 65 dB.

The operator, hearing the next (third) signal in the head phones 26, presses the button-shaper unit 8, the pulses from the output of which performs operations similar to that described above.

The arrival of a pulse at the input of the counter 40 will cause the appearance of a single potential (pulse) at its output, which is fed to the input of the element 42, ensuring the passage of clock pulses from the second output of the generator 7 to the shift inputs C of registers 9 and 10 similarly to the above.

 If the response to the third signal (65 db) was faster than the second signal (55 db), then the pulse from the second output of block 16 through a lump, | u1utator 17 goes to the input of counter 31z, indicating a decrease in response time when switching from a quiet signal to loud.

If the response to the third signal was slower than the second signal, then the pulses from the first output of block 16 through switch 17 arrive at the input of counter 314, indicating an increase in response time when switching from a quiet signal to a loud one.

The appearance of a pulse at the output of the element 41 ensures the reset of the counter 40,

returning the trigger 35 to the zero position. The pulse from the output of the element 43 is fed to the input element And 39, to the second input. which fed a single potential from the first trigger output, and from the last output to the reset input of register 10, setting the latter to the initial state.

The delayed pulse from the output of the element 44 will fix the unit in the counter 40.

After responding to the presentation of a signal with a sound power of 120 dB, following the signal in O db, a unit potential appears at the last output of the decoder 23, which is fed to the second input of the driver 1, turning off the generator 19, and to the second input of the indicator 5, highlighting the readings counters 31.

The use of the invention in devices for studying the psychophysiological characteristics of operators allows one to quantify the nature of changes in the reaction time when the intensity of perceived Sigia changes from a quiet stimulus to a loud one and decreases from a loud sound to a quiet one, i.e. with an increase in the contrast of signals (stimuli), - presented by chance. The change in the levels of sound intensity with a frequency of 1000 Hz is in the range from O db (hearing threshold) to 120 db - (suppression). By the number of timestamps highlighted on nodes 27i and 27, displaying the readings of counters 311 and 312, the possibility of using operators for pa6ofs in a given system is determined by the person — the machine, and by the number of timestamps highlighted on nodes 27z and 27, showing readings of the counters 31z and 31 (1, carry out monitoring of the functional state of the subject (physical and mental), the results of which are taken into account when qualifying the operators.

Claims (1)

Invention Formula Device for controlling operator's work, containing a random pulse sequence driver, the output of which is connected to the first input of the element, the key, whose information input is connected to the output of the first generator, the operator response input unit, the output of which is connected to the first input of the control program setting block, the first the output of which is connected to the corresponding input of the generator of a random sequence of pulses, the switch, the outputs of the group of which are connected to the corresponding inputs of the registration unit 5, as well as the second generator, the first switch and the indicator, the inputs of the group of which are connected to the corresponding outputs of the registration block, with a current topic. that, in order to expand the didactic capabilities of the device, a second switch, a pulse shaper of the first and second registers, the installation inputs of which are connected to the first and second 5 outputs of the second switch, and control inputs with the first and second outputs of the first switch, respectively, the first and second control units, the first outputs of which are connected to the clock 0 inputs of the corresponding registers, the second outputs correspond respectively to the first and second inputs of the pulse former, the first and second inputs correspond to the corresponding outputs of the first and second registers, respectively, the third and fourth inputs to the first and second outputs of the pulse former, respectively, and fifth inputs respectively to the first and second outputs of the first switch, the first input 0 which is connected to the output of the element I, and the comparison unit, the first and second inputs of which are connected to the first outputs of the first and second registers, respectively, and the first and second outputs to the corresponding inputs of the registration unit, the third input of which is connected to the output of the operator response input block , the second input of the generator of a random sequence of pulses and the third input 0 pulse generator, the fourth input of which is connected to one output of the second generator, and the first output - to the corresponding input of the second switch, the second input of which and the corresponding 5 the input of the first switch is connected to the output of the switch, the second input of the element I is connected to another output of the second generator, the control input and the output of the key are connected respectively to the output of the random pulse generator and to the second input of the control program setting block, the first and second outputs of which are connected to corresponding inputs of the indicator.