RU2201130C2 - Human operator monitoring system - Google Patents

Abstract

FIELD: medical engineering. SUBSTANCE: system has biological signal transducers, common electrode transducer, electrode for suppressing inphase component, bioelectrical signal multiplexor unit, normalizing amplifier, analog-to-digital converter of electric biological signals, control unit, sequential communication interface unit, host computer, preliminary amplifier, autonomous power supply source, temperature gage, thermoelectric signal multiplexor unit, zero adjustment digital-to-analog converter, thermoelectric signal analog-to-digital converter , code-to-voltage transducer for suppressing inphase component, microprogram memory unit, read-only-memory unit, biological feedback processor, stimulus and test digital-to-analog converter, stimulus and test normalizer, paraphase commutation unit, wireless transceiver of human operator, wireless transceiver of computer. EFFECT: higher information capacity of biological data; wide range of functional applications. 3 cl, 2 dwg

Description

 The proposed human operator monitoring system belongs to the field of medicine, namely to research and diagnostic systems with biological feedback for a comprehensive assessment of the state and capabilities of the human operator and the operational correction of its psychophysiological state.

 In a number of cases (for example, for operators of nuclear power plants, space stations, submarines and other human-operator activities that require decision-making in extreme situations), it is necessary to continuously monitor human-operator systems in natural (or as close as possible) conditions to tasks and making an operational decision on professional suitability at a given time and access control.

 At the same time, it is necessary that such systems have biological feedback with the operator, which allows not only to control the degree of adequacy of his behavior, but also to perform operational correction, if necessary, his psychophysiological state by special methods.

 Such a system should be compact, highly informative, have a high degree of reliability and reliability.

 Existing polygraphs with a large number of channels are large and have a large processing time. They practically do not realize biological feedback for the operational correction of the psychophysiological state of a human operator.

 Therefore, it becomes necessary to select the most informative bioelectrophysiological channels of the state of the human operator and the most effective methods of correcting his psychophysiological state in order to reduce the overall dimensions and processing time. At this time, the most significant channels of the psychophysiological state of a human operator are considered channels of EGG, ECG, thermograms, etc.

 A known system for recording and processing electroencephalographic signals (electroencephalograph) (LR Zenkov. Clinical electroencephalography. - Taganrog State Radio Engineering University, 1996, p. 24), containing a switching unit, a unit of amplifiers and filters, ADC, data input unit, processor unit , stimulation unit and calibration signal generator.

 Also known is a system for recording and analyzing evoked brain potentials (V.V. Gnezditsky. Evoked brain potentials in clinical practice. - Taganrog State Radio Engineering University, 1997, p. 27), containing a stimulus generator, stimulation block, EEG amplifiers, filter, ADC, processor for selecting and processing VIs, printer and monitor.

 The reasons that impede the achievement of the required technical result in both systems are the limited dynamic range of input frequencies, high hardware costs, low accuracy, the presence of a wired connection between a person and the system, which makes it impossible to use it for continuous monitoring of a human operator in the process of performing tasks, and limited functionality.

 Of the known systems, the closest in technical essence is the system of registration, storage and research of electro-biopotentials (application 96121714 from 11/14/1996. The system of registration, storage and research of electro-biopotentials), containing a set of electrodes, protection elements, controlled keys (switches), a unit for generating test signals , differential signal generating unit, differential amplifiers, filters, switch, ADC, controller, galvanic isolation unit, interface, microcomputer, suppression signal generating circuit in-phase component.

 The reason that impedes the achievement of the required technical result is that the system with a comparative increase in accuracy with respect to previous devices still has a limited dynamic range of input frequencies, high hardware costs, the presence of a wired connection between a person and the system, which makes it impossible to use it for continuous monitoring a human operator in the process of fulfilling tasks, and limited functionality.

 Signs of the prototype, common with the claimed technical solution, are as follows: a set of electrodes (biological signal sensors and a common electrode sensor), a common-mode signal suppression signal generating circuit (common-mode component suppression electrode), a switch (bioelectric signal multiplexer), differential amplifiers (normalizer amplifier ( УН), analog-to-digital converter (ADC) (analog-to-digital converter of electrobiological signals (АЦПЭБС), microcomputer (control controller), serial interface th communication (BCC), a personal computer (host computer).

 The objective of the proposed technical solution is to increase accuracy, reduce overall dimensions, higher information content, a higher degree of reliability and reliability of monitoring results, as well as the implementation of short-range methods of correction of the psychophysiological state of the operator.

 The technical result achieved by the implementation of the invention is to increase the informativeness of biological information (an extended frequency range of electrobiological signals and an additional thermogram channel), the presence of biological feedback for the operational correction of the psychophysiological state of a human operator, the presence of wireless communication that allows the functioning of the system as a whole under normal conditions for the activities of a human operator or as close as possible naturally, the overall increase in the accuracy and reliability of the system, reducing the weight and dimensional parameters pickup device and the biological information of the operator-human psychophysiological state correction apparatus using biofeedback.

 The system consists of the following components: biological signal sensors, common electrode sensor, common mode rejection electrode, bioelectric signal multiplexer, normalizer amplifier, analog-to-digital converter of electrobiological signals, control controller, serial communication interface, central computer. It also additionally includes the following units: a preamplifier, an autonomous power supply, a temperature sensor, a thermoelectric signal multiplexer, a digital-to-analog converter (DAC) for zero correction, an ADC for thermoelectric signals, a code-voltage converter for suppressing the common-mode component (PCNPS), a microprogram memory block, random access memory, biofeedback processor (BFB), DAC stimuli and tests, stimulus and test normalizer, paraphase signal switching unit , human operator’s wireless transceiver, computer’s wireless transceiver.

 The invention is illustrated in FIG. 1, which shows the structural diagram of the system.

The system includes the following blocks:
1.1 -1.N. - sensors of biological signals (DBS),
2 - common electrode sensor (DOE),
3 - electrode suppression of the in-phase component (EPSS),
4 - a multiplexer of bioelectric signals (MBEC),
5 - thermoelectric signal multiplexer (MTES),
6 - amplifier normalizer (UN),
7 - analog-to-digital Converter (ADC) of electrobiological signals (ADCES),
8 - digital-to-analog Converter (DAC) zero correction (CAPKN),
9 - ADC thermoelectric signals (ADCTES),
10 - converter code - voltage to suppress the common mode component (PCNPS),
11 - control controller (KU),
12 - block memory microprograms (BPMP),
13 - random access memory (RAM),
14 - processor BOS (CBOS),
15 - DAC incentives and tests (CAPST),
16 - normalizer of stimuli and tests (NST),
17 - block switching the paraphase signal (BKPS),
18 - serial communication interface (IPS),
19 is a wireless transceiver device of a human operator (for example, through an infrared channel) (BEUCO),
20 - wireless transceiver device of the computer (BTUZK),
21 - central computer (CC).

The composition of the biological signal sensor includes:
1.1.1 - electrode (e.g. silver chlorine),
1.1.2 - pre-amplifier,
1.1.3 - autonomous power source,
1.1.4 - temperature sensor.

The composition of the DOE:
2.1 - common electrode,
2.2 - amplifier
2.3 - temperature sensor,
2.4. - autonomous power source.

And in FIG. 2 shows a block diagram of the algorithm of the system, where the following notation:
1 - "Start";
2 - "Testing";
3 - "Health Check";
4 - "Fault signal";
5 - "Monitoring mode?";
6 - "A = 1";
7 - "B = 1";
8 - "Input bioelectric signals from the A electrode";
9 - "Input thermoelectric signals from the electrode B";
10 - "Check for compliance with the normalized signal";
11 - "Data input and processing in a biological feedback processor";
12 - "Data output from the processor to RAM";
13 - "B> N + 1";
14 - "B = B + 1";
15 - "A>N";
16 - "Data output to the central computer";
17 - "A = A + 1";
18 - "Change the gain of the amplifier-normalizer";
19 - "Mode of stimulation?";
20 - "Enter stimulation program";
21 - "Rationing of the stimulating signal";
22 - "Selection of the required pair of electrodes from 1 to N + 1";
23 - "Stimulation of zones";
24 - "Continue Stimulation?"
25 - "Continue to work?"
26 - The End.

The system works as follows: the biological signal sensors 1 are placed on the head of a human operator according to the corresponding scheme. DOE 2 is located at the location of the common electrode of bioelectric signals. The common-mode suppression electrode 3 is located on a part of the body that is substantially remote from the sensors of biological signals (for example, on one of the limbs.)
Blocks 4-19, made structurally in a compact casing, are placed in a place convenient for the operator to carry out work activities.

 Block 20 and 21 are stationary, in a place convenient for continuous monitoring.

 When the system is turned on, the testing mode is carried out (see Fig. 2), followed by the monitoring mode with the possibility of using biofeedback electrical stimulation.

 The monitoring process is as follows: from each of the biological signal sensors from 1.1 to 1.N, information about the psychophysiological state of the human operator in the form of an electric potential is fed to the corresponding multiplexers: MBEP and MTES. The multiplexer 4 provides the alternate connection of each of the sensors from 1.1 to 1.N through the UN 6 to the input of the ADC 7. The multiplexer 5 provides the connection of signals from the temperature sensors from 1 to N + 1, to the input of the ADC 9. The processor 11 picks up and processes information with both ADCs 7 and 9. To ensure the operation of block 11, the BPMP 12 is used. Information is exchanged with the central computer 21 through the interface node 14 via the wireless channel 20, 19. To expand the lower boundary of the frequency band of the processed signals from biological sensors from 1 to N, use zuetsya DAC 8, performs compensation of the constant component of each channel. KU 11 normalizes the measured signals in accordance with the level of input signals for each channel. To suppress the in-phase component, an electrode 3 is used, which, according to the signal of the processor 11, leads the potential of the human operator to a level close to the average value of the measured potential through PCNPS 10. From the first output of the block of test signals, a signal is supplied to the second inputs of the differential amplifiers of each of the sensors from 1 to N. If necessary, the monitoring mode can be accompanied by a stimulation mode.

 In stimulation mode: the biofeedback processor (14) and RAM (13) implement the biofeedback programs for a given event. In this case, from the corresponding outputs of the TSS (14), digital codes corresponding to the necessary shape and magnitude of the stimulus are supplied to the inputs of the CAPST (15). The output of the converter is connected to the NST (16), the purpose of which is to bring the CAPST output signal to the stimulus level and decouple it from the power supply, BKPS (17) alternately selects the necessary pairs of electrodes from 1 to N + 1 located in the corresponding stimulation zones .

 Test mode: KU selects from the BPMP an appropriate set of test signals that are fed to the CAPST inputs. The HCT connected to the CAPST output, by the corresponding command from the control unit, switches to the normalizer mode of the test signal. The normalized test signal from the HCT is fed to the paraphase signal switching unit, which carries out its sequential supply to all electrodes.

 Thus, the system described above makes it possible to carry out an operative comprehensive assessment of the state and capabilities of a human operator with high reliability and effective operational correction of its psychophysiological state using biological feedback.

Claims (3)

 1. A human operator monitoring system containing biological signal sensors, the first outputs of which are connected to N inputs of a bioelectric signal multiplexer, the output of which is connected to the first input of a normalizer amplifier, a common electrode sensor, the first output of which is connected to the first inputs of each biological signal sensor, common mode rejection electrode, analog-to-digital converter of electrobiological signals, control controller, serial communication interface, central computer ter, characterized in that it includes a digital-to-analog converter for zero correction, an analog-to-digital converter for thermoelectric signals, a biofeedback processor, a random access memory, a microprogram memory unit, a wireless transceiver for a human operator, a wireless transceiver for a computer, a digital-to-analog stimulus converter, and tests, stimulus and test signal normalizer, digital-to-analog converter for suppressing the in-phase component, switching a paraphase signal, a thermoelectric signal multiplexer, to the N + 1 inputs of which the second outputs of the biological signal sensors and the second output of the common electrode sensor are connected, and the output through an analog-to-digital converter of thermoelectric signals to the first input of the biological feedback processor, to the second input of which an analog-to-digital converter of electrobiological signals is connected to the output of the amplifier-normalizer, to the second input of which the output of the digital-to-analog converter is connected a zero correction device, the input of which is connected to the first output of the biofeedback processor, the second output of which is connected through the digital-to-analog converter of stimuli and tests to the input of the normalizer of stimulus and test signals, and through the digital-to-analog converter to suppress the in-phase component - to the input of the common-mode component suppression electrode, the third output the biological feedback processor is connected to the first input of the control controller, the second input of which is connected to the bi-directional bus, connected to the third input of the biofeedback processor, the input of random access memory, and the serial communication interface, the third input is connected to the output of the microprogram memory, and the output is connected to the input of the microprogram memory block, to the third input of the normalizer amplifier, and the control inputs of biological and thermoelectric signal multiplexers, a paraphase signal switching unit, the second input of the normalizer of stimulus and test signals, the third input of which is connected to the first output of the common electronic sensor an ode whose paraphase output through (N + 1) • 2 outputs of the paraphase signal switching unit is connected to the corresponding second inputs of the biological signal sensors and the input of the common electrode sensor, and the output of the serial communication interface through a wireless transceiver device of a human operator and a wireless transceiver device of a computer is connected to the central computer.  2. The system according to claim 1, characterized in that the biological signal sensors comprise an autonomous power source, an electrode, a temperature sensor, a preliminary amplifier, the first input of which is connected to the first input of the biological signal sensor, the second input to the electrode and to the second input of the biological sensor signals, and the output is with the first output of the sensor, the second output of the biological signal sensor is connected to the output of the temperature sensor, and the autonomous power source is connected to a pre-amplifier and a temperature sensor.  3. The system according to p. 1, characterized in that the common electrode sensor contains an autonomous power source, a common electrode, a temperature sensor, a matching amplifier, the input of which is connected to a common electrode and to the input of the common electrode sensor, and the first output to the first output of the sensor the common electrode, the second output of the common electrode sensor is connected to the output of the temperature sensor, and the autonomous power source is connected to a matching amplifier and a temperature sensor.

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