SU1231530A1 - Device for checking psychophysiological conditions of trainees - Google Patents

Abstract

The invention relates to automation and computer technology and can be used both during training and during psychological and pedagogical experiments during the educational process. The aim of the invention is to improve the accuracy of the device. The device for monitoring the trainees includes pulse sensors, a display unit, an amplifier unit, a frequency meter, a switching unit, a reference voltage setting unit, a control unit, a comparison unit, a pulse rate calculator. The device allows constant monitoring of the activity of both each student and the group as a whole. 3 hp ff, 5 ill. (L tN5 SO ate with

Description

The invention relates to automation and computer technology, in particular to automated training systems and can be used both in training and in conducting psychological and pedagogical experiments during the educational process.

The purpose of the invention is to improve the accuracy of the device.

FIG. 1 shows a block diagram of the device; in fig. 2 is a block diagram of a calculator of the rate of change of the pulse; in fig. 3 is a block diagram of the control device of FIG. 4 - basic electrical circuit of the switching element; in fig. 5 shows plots of the addition of signals in the adder of the calculator of the rate of change of the pulse.

The device for monitoring the trainees contains 1 pulse sensors (the number of which corresponds to the number of trainees) indication unit 2, amplifier unit 3, frequency meter 4, switching unit 5, reference voltage setting unit 6, control unit 7, comparison unit 8, pulse rate calculator 9 and input 10 of the display unit 2.

Block 2 is formed by switching element 11, integrators 12 and 13, indicator 14 and individual control nodes 15 (their number corresponds to the number of students) containing triggers 16 and indicators 17.

The calculator 9 of the rate of change of the pulse contains an adder 18, a differentiating circuit 19, a trigger 20, a digital-to-analog converter, a D / A converter 21, and a delay element 22.

Blbk 7 consists of a generator 23 1 1 pulses, multivibrators 24 and 25, a dagging circuit 26, a frequency divider 27 and a trigger 28.

The switching element 11 contains relays 29, normally-closed contacts 30 and 31, as well as normally-closed contacts 32 and 33.

Switching unit 5 consists of two stepping finders, one of which alternately to the control pulses from the output of the control device 7, connects the pulse sensors 1 to the amplifier block 3, and the second stepping finder also connects to the control pulses alternately the outputs of block 6 to the inputs of the corresponding triggers 16

display unit 2 and the input of the comparison unit 8.

Unit 6 reference voltages is a set of potentiometers according to the number of trainees. The engine of each potentiometer is set to a position corresponding to the voltage proportional to the rate of change in the heart rate of the student in a quiet state, determined experimentally before the start of classes.

The device works as follows.

Before starting a group of students in the setter 6, the values of the rate of change of heart rate / heart rate of each student are set. The sensor 1 pulsa is attached to

the earlobe trained. When the first pulse arrives from the first output of the generator 23, the first step finder of the switching unit 5 connects the sensor 1 of the first learner's pulse to the input of the amplifier unit 3, and the second step finder the first Reference voltage of the setting device 6 simultaneously to the input of the control unit 8 and the trigger input 16 first node

15 individual, control The amplified signal in block 3 of the amplifiers arrives at the first Bxoft frequency meter 4. A pulse generator 23 starts the first multivibrator 24 operating in a sound mode, and the second multivibrator 25 generating a pulse signal with a period

.

- T,

where T | „„ is the period of impulses produced by the generator23

pulses;

 max maximal pulse period of trainees. This signal through the differentiating circuit 26 is fed to the second input of the multivibrator 24 of the second, which is opened by the second pulse generated by passing through the differentiating circuit 26.

In the output of the first multivibrator 24, a pulse signal is produced with a duration of 2 T "", which, when a frequency meter .4 arrives at the second input, generates pulses at its output, the duration of which is equal to the period of the pulses from the code of the amplifier block 3. These pulses are simultaneously input.

adder 18 and the input element 22 of the delay. Element 22 transmits pulses to the input of the adder 18, separated by time

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tcp sa 2

  T

- back. min E "p) max p,

ap. H 1 in and

- jag-max. H i

t - the difference is minimal

 Min

periods of the student's pulse at the beginning and at the end of the control cycle; , - line delay time

delays; - the maximum difference

periods of the student's pulse at the beginning and at the end of the control cycle;

- the minimum period of the pulse of trainees.

In the adder 18 is the addition of the first and last signals, separated by time. As a result of the addition, a signal is obtained at the output (Fig. 5), which as a result of differentiation and differentiating circuit 19 is converted into one pulse of positive polarity and two pulses of negative polarity. The latter are separated in time by an amount proportional to the rate of change of the pulse of the first student, and control the operation of the trigger 20 (the first pulse opens, the second closes). The output of the calculator 9, the rate of change of the pulse after passing the signal through the converter 21, produces a voltage proportional to the pulse duration coming from the output of the trigger 20. The greater the rate of change of the heart rate during mental work of the learner, the higher the voltage at the output of the calculator 9 speed pulse changes. The threshold of operation of the comparison unit 8 is determined by the signal arriving at its input from the output of the switching unit 5. At the output of the comparator unit 8, a signal is obtained that is proportional to the degree of activity of the first student (as the rate of change is compared (w pulse before and during occupation). This signal is post0

five

0

five

0

It goes to the inputs of the flip-flops 16 and the input of the element 11. If the signal received at the input of the flip-flop 16 of the first node 15 of the individual control, the signal 18 at the other input triggers, the first trainee has reached the specified level of activity. The second and subsequent learners are monitored sequentially. The control time of each student is determined by the type and intensity of the occupation and is determined by the frequency of the generator 23 pulses. The signal received from the output of block 8 of the comparison input of the switching device 11 passes through its first normally closed contact 30 to the integrator 12 pulses. The duration of the pulse accumulation cycle in the integrator is determined by the number of trainees, which is set on the frequency divider 27. The signal from the output of the pulse generator 23, the passage through the divider only after the end of the first cycle of control of all trainees, opens trigger 28, which gives a signal to the coil 29 of the relay. In this case, the normally-closed contacts 30 and 31 are opened, and the normally-open contacts 32 and 33 are closed. The signal accumulated in the integrator 12 through the contact 33 enters the indicator 14, indicating the degree of activity (in percent) of the group of students as a whole. At the same time, through the closed contact 32, there is an accumulation of pulses in the integrator 13 of the student’s second cycle of control. At the next actuation of element 11, when contacts 30 to 31 are closed, and 32 and 33 are opened, the accumulation of pulses occurs in integrator 12, and the signal accumulated in integrato 13 13 through contact 31 goes to indicator 14. Thus, there is a constant control of activity like each student separately, and the group as a whole.

Claims (4)

Invention Formula 1, A device for monitoring the psycho-physiological state of the trainees, comprising pulse sensors, an indicating unit and an amplifier unit connected in series and a frequency meter, characterized in that, in order to improve the accuracy, it is device-based; A reference voltage adjuster, a comparison unit and a switching unit are inputted into it, the inputs of the first group of which are connected to the outputs of the pulse sensors, the inputs of the second group are connected to the outputs of the reference voltage generator, the outputs of the group are connected to the inputs of the display unit group, the first output is connected to the input of the unit amplifiers, and the second to the first input of the comparator unit, whose output is connected to the first input of the display unit, the calculator of the rate of change of the pulse, the output of which is connected to the second input of the comparator unit, and the input is connected with the output of the frequency meter, the control unit, the first, second and third outputs of which are connected respectively to the input of the switching unit and the second inputs of the display unit and the frequency meter. 2. The device according to claim 1, wherein the display unit comprises a switching element and triggers, the first inputs of which are the inputs of the group of the block, and the second inputs and the first input of the switching element are the first input of the first and second integrators whose outputs are connected respectively with the second and third inputs of the switching element, the fourth input of which is the second input of the unit, the first 0 five 0 five and the second outputs are connected to the inputs of the respective integrators, the third is connected to the first indicator, and the other indicators are connected to the outputs of the flip-flops. 3. The device according to claim 1, wherein the calculator of the rate of change of the pulse comprises a series-connected adder, a differentiating circuit, a trigger and a digital-in-step converter, the output of which is the output of the calculator, and a delay element whose input and the first input The accumulator is the input of the calculator, the output of the delay element is connected to the BTd input of the adder. 4. The device according to claim 1, characterized in that the control unit comprises a series-connected pulse generator, a first multivibrator, a differentiating circuit and a second multivibrator, the output of which is the first output of the block, serially connected frequency divider and trigger, the output of which is the second output unit, the second output of the pulse generator is the third output of the unit, the third output is connected to the second input of the second multivibrator, and the fourth output is connected to the input of the frequency divider. FIG. 2 n5l.11 28 K8l. - srig. .12 Compiled by O. Boldyrev Editor L. Pchelinska Tehred L. Oleinik Proofreader M. Pojo Order 2654/53 Circulation 455 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 f f / t. 13 fi & a r-q fie.V