Telemetric control system for checking operator working capacity from vigilance level and hypoglycemia precursors

FIELD: medical engineering.

SUBSTANCE: device has telemeter, electrodes for recording electric dermal activity from phase and tonus components, electrodes for recording hypoglycemia precursors from critical drop of electric skin resistance, logarithmic transducers, dual-channel analog-to-digital converter, code package shaper and transmitter connected to stationary part unit having receiving unit, control and signal-processing unit, display unit with acoustic signal unit and awareness and hypoglycemia precursors indication units.

EFFECT: wide range of functional applications.

6 cl, 2 dwg

 

The invention relates to diagnostics of psychophysiological state of a person in the process of professional activity and can be used in the automatic control state operators, in particular drivers of the vehicles.

It is known that the safety in industry, transport is primarily determined by the psycho-physiological state of the human operator responsible professions. For example, being in the stage of exhaustion, under the influence of stress or under the influence of alcohol or drugs impact statement - driver loses an objective picture of the traffic conditions, as a source of road accidents.

Described a large number of inventions relating to technical countermeasures as initially unworkable operator, and the operator who is in the process of professional activity loses efficiency. So, it is known the use of gas analyzers for the determination of alcohol vapors in the breathing process of the driver, preventing engine start (EP 1024746 A1, Smart Start Inc., 09.08.2000), the use of speech recognition systems (EN 2148505, CJSC “NEUROCOM”, 60 TO 28/06, 10.05.2000) for the same purpose.

Another way of monitoring the state of the operator is fixing its physiological, parametro is - electroencephalogram, electromyogram and electrooculogram, and their joint analysis (WO 00/44580 A1, Compumedics Sleep. PTY. Ltd, 03.08.2000), state pressure, heart rate, skin temperature, its conductivity and other (WO 02/096694 A1, 05.12.2002). The control of the functional state can be effectively used to maintain health, for example, in terms of monotony, when the operator loses vigilance (see EN 2111134 C1, NEUROCOM, 1998). One of the most informative criteria for the transition into a state of loss of efficiency of the operator is the change in galvanic skin response (RU 2107460 C1, NEUROCOM, 27.03.1998; US 6167299, Galchenkov et al., NEUROCOM, 26.12.2000). The device for implementing the method comprises electrodes with means for attaching them connected to the input device, means for suppression of impulse noise, means for selecting a signal in the band of physical and tonic components of electrodermal activity, means for detecting pulses of a physical component, the registration unit.

The closest device on the purpose and set of features is a system for patent RU 2200095 C1, NEUROCOM, 10.03.2003. Telemetry system vigilance of the operator contains electrodes with means for attaching them connected to the input of the device connected to blocks of the reception signal processing and control the deposits and the display unit. The electrodes and the input device is designed as a single unit to the remote sensor with the possibility of placing and fastening on the wrist or finger of the operator. Blocks of the reception signal processing and control and display unit housed in a single unit stationary part, the connection mentioned telemetry sensor and reception unit is wireless. The input device includes sequentially connected logarithmic Converter, analog-to-digital Converter, the driver code parcels and a transmitter having a transmitting antenna, which is the output of the remote sensor. The block signal is two-channel, with each channel is formed of series-connected receiving antenna, an amplifier, high frequency detector, the correlator outputs of correlators connected to the preprocessing block of information, connected through the interface unit, signal processing and control, and receiving antennas are mutually orthogonal polarization. The signal processing unit and a control connected to the blocks of the input signals of the vehicle, interfacing with the onboard computer of the vehicle, the generation of control actions and interface to communicate with the display unit, the block input signals connected with snap is the first confirmation of wakefulness and has a group of inputs for connection to respective electrical circuits of the vehicle. The display unit includes a control unit display, the outputs of which are connected the unit audible alarm and indicator of the level of wakefulness.

The system allows to monitor the alertness of the operator, but does not allow timely inform about the possibility of hypoglycemic shock, if the operator suffers from diabetes.

At the same time, hypoglycemic shock in patients with diabetes mellitus is one of the most dangerous States of the human operator. Hypoglycemia often occurs due to negligence of the patient with diabetes, which in time will not take food or unacceptable increase physical activity. In mild stages of hypoglycemia person feels hunger, more sweating, weakness, and when severe can lead to loss of consciousness and even death. There are many cases when people, for example, managing the vehicle due to the sudden onset of hypoglycemia was losing control over their actions and created an emergency situation on the road, often leading to serious consequences (see Rune Elvik, Anne Borger Mysen, Trols the Shaft. The Handbook of road safety / Env. with Norv. Edited by Prof. VLA. M: MADI (STU), 2001. 754 C.). In accordance with the List of medical contraindications to the standpipe (approved by the order of Ministry of health of the USSR from September 29, 1989 No. 555) patients with diabetes admitted unfit for professional activities as drivers of vehicles of categories "b", "C", "D" and "E". At the same time, in Russia and some other countries this disease is not an obstacle to obtaining the rights to manage the car.

As described above, current is early recognition of the symptoms of an approaching attack of hypoglycemia using non-invasive remote sensing techniques. This makes sense both from the point of view secure mission critical work, and return to full activities of persons suffering from diabetes, when such activity is prohibited by reason of any disease.

The present invention is a device that provides health monitoring operator's level of wakefulness and to identify precursors of hypoglycemia. According to the information available to the applicant, the statement of the problem and the means of its solution are new.

The technical result, formulated in the problem of the invention is achieved by the fact that the telemetry system of monitoring the health of the operator contains block the remote sensor including a first pair of electrodes for registration of electrodermal activity on physical and tonic components, the connection is nnuu to soedinenii each other first logarithmic Converter, analog-to-digital Converter, the driver code parcels and the transmitter connected via radio with the unit stationary part, the output of which is connected to the display unit including the control unit display, the outputs of which are connected the unit audible alarm and indicator of the level of wakefulness. In addition there are means for registration of a predictor of hypoglycemia critical decline in the electrical resistance of the skin, is made in the form of the second pair of electrodes connected to the second logarithmic Converter, while the analog-to-digital Converter is two-channel, to its inputs connected to the outputs of the both mentioned logarithmic converters, and the display unit includes an indicator predictor of hypoglycemia on critical drop in the electrical resistance of the skin, connected to the output of the control unit display.

The system can be characterized by the fact that the first pair of electrodes has means for galvanic coupling with the inner surface of the skin of the wrist or finger, and the second dorsal area of the hand or wrist of the operator.

The system can be characterized and what to critical drop in the electrical resistance of the skin, as a precursor GI is glikemijskog shock, consider the magnitude of the drop in the electrical resistance of the skin in the range from 1.5 to hundreds of times over a period of time not exceeding one minute.

The system can be characterized also by the fact that block the remote sensor is designed as one with the electrodes of the second group unit with stowage and securing the hand of the operator.

The system can be characterized, moreover, by the fact that block the remote sensor is designed as one with the electrodes of the second group unit with stowage and securing the hand of the operator.

The system can be characterized by the fact that the tool mounting block the remote sensor on the hand of the operator is made in the form of gloves or part thereof, and electrodes mounted on the inner surface of the gloves with the possibility of galvanic coupling with the skin of the hands.

The basis of patentable inventions are the following provisions. As is known, to date no reliable bloodless method of determining the level of sugar in the blood. At the same time to determine hypoglycemia is not necessary to know the quantitative concentrations of sugar. It is enough to detect the precursors of hypoglycemic shock to the human operator was able to take a standard corrective action. One of the forerunners of the C is increased sweating in areas on the skin, where there is no sweating due to other causes, such as emotional state of the person. Such areas should also be characterized by the absence of thermal regulation of sweating in a comfortable temperature conditions. Examples of areas that meet the conditions described, are the skin of the back area of the hand and wrist of a person. Increased sweating is a sharp drop in the electrical resistance of the skin G. As shown by the experiments, as harbingers of hypoglycemic shock can be taken of the magnitude of the drop in the electrical resistance of the skin G in the range from 1.5 to tens or hundreds of times during a time interval not exceeding a few tens of seconds. For generating signals-precursors used modernized tract conversion and signal processing for patent-analogue EN 2200095, the essential features of which are disclosed in the following graphic materials and description.

The invention is illustrated in the figures, where:

figure 1 shows a block diagram of the patent system;

figure 2 presents the algorithm of functioning of the system.

The system contains (see figure 1) remote sensor 10, the receiver 20 signals the remote sensor, the controller 30 and the device 40 display. The remote sensor 10 purpose is to obtain information about the relative change of the parameters of the skin resistance of the driver, conversion of this information into the code of the package and transmitting them by radio gigahertz frequency range on processing subsystem signals the remote sensor. The remote sensor 10 is located on the wrist or finger of the operator and can be made in the form of a bracelet, a watch or ring, as well as gloves or its fragment, worn on the hand.

The remote sensor 10 has two pairs of electrodes 101 and 102, 103 and 104, which provides electrical contact with the skin of the operator. One pair of electrodes (102, 101) is designed to record electrodermal activity, the parameters of which are in-band signals physical and tonic components (completely analogous closest analogue EN 2200095). The second pair of electrodes (103, 104) is intended for registration of a predictor of hypoglycemia on critical drop in the electrical resistance of the skin. These electrodes are installed in the zones, as noted above, is usually not characterized by sweating in conditions of emotional stress, and not expressly sweating in a comfortable environment. Such areas are the back of the brush area or back of the wrist of the operator.

A pair of electrodes connected to the input of the logarithmic converters 106, 107. The outputs of converters 106, 107 p is clucene to the inputs of the dual-channel analog-to-digital Converter (ADC) 108, the output of which is connected to the input of the shaper 110 code of parcels, the output of which is connected to the transmitter 112, which is connected to the transmitting antenna 114. Power sensor 10 is supplied from the battery 113.

The signal receiver 20 of the remote sensor 10 is designed to receive high-frequency signals via two independent channels with mutually orthogonal polarization, which are two receiving antennas 202 and 204. Antennas 202, 204 are connected to two amplifier channels high frequency 206, 208, which outputs through the detectors 210, 212 are connected to the inputs of the channel correlators 214, 216. From the output of the correlator 214, 216 of the digital values of the correlation function of the input signal fed to the input of block 218 preliminary processing of telemetry sensor. The output of the above-mentioned block 218 is connected to the interface 220 for communication with the controller 30.

For this purpose, the controller 30 has an interface 302, connected to a block 304 control and digital signal processing. Block 304 is connected to the block 306 generating control actions with a number of corresponding output terminals 308 to connect to a variety of alarm systems or management of the object (the object can be a vehicle). In this case, to one input of block 304 is connected to the block 310 of the input signals, having a group of inputs 312 for connection to appropriate Estulin circuits of the object. For example, for a vehicle - the signs of braking, turning, and others. To block 310 is also connected button 314 confirm awake. To connect unit 304 to the onboard computer managed object entered block 316 mates, whose input is connected to the block 304, and the output has a corresponding connector 318. In addition, the block 304 is associated with the interface 320 for communication with the device 40 display.

The device 40 display associated with the interface 320 via interface 402 that is connected to the block 404 control indication with appropriate outputs. These outputs are connected to the block 406 audible alarm indicator 408 wakefulness, showing the level of wakefulness of the operator conditional on the scale, and the indicator 410 predictor of hypoglycemia on critical drop in the electrical resistance of the skin.

Interfaces 220, 302, 320, and 402 can be arranged according to the standard RS-232C or another used on the managed object.

The device operates as follows.

The current through the skin of the hands, marked in figure 1 as the resistance G, connected to the pairs of electrodes 101, 102 and 103, 104, converted logarithmic converters 106, 107 to a voltage and fed to the inputs of the ADC 108, which measures the current value of the resistances G.

The output signal from the ADC 108 is supplied to the imaging unit 10 of the code of parcels, which controls the modulation of the transmitter 112 of the radio channel. In the code parcels transmitted as information about connecting the electrodes 101, 102, 103, 104 to the body of the operator, the voltage of the battery (block 113) and the onset of the test mode.

The receiver 20 signals the remote sensor receives the high-frequency pulse-modulated signals via two independent channels with mutually orthogonal polarized receiving antennas 202, 204. After amplification (units POS. 206, 208), detection (Ref. 210, 212) and regulation on the amplitude of the input signal on each channel is fed to the inputs of channel correlator 214, 216. With the issuance of said correlators digital values of the correlation function of the input signal fed to the input of block 218 preliminary processing of telemetry sensor. Channel to handle the actual sending of telemetry sensor is selected by the maximum value of the correlation function on the interval of the start bit of the parcel.

Upon request of the controller 30 code information together with evidence of testing and the error is fed to the output device. Block 304 management and digital processing analyzes received from the receiver 20, the signals corresponding to the measured value of resistance of the skin. Based on this analysis, given the known criteria of being awake for skin-galvanize the coy responses (e.g., EN 2107460) unit 304 determines the level of alertness of the operator.

In accordance with the level of wakefulness through interface 320 to the input device 40 display enters status code indicator 408. Block 404 control indication includes the required number of elements of the indicator (e.g., LEDs) and in critical reduction of the level of wakefulness sends a signal to block 406 audible alarm. Sound the alarm requires the operator pressing the button 314 confirm awake. If the operator has pressed the button 314 or block 310 input signals from a vehicle registered signal on any of the inputs 312, the entire system continues as before. In that case, if the output from block 310 to block 304 not received any signal, confirming wakefulness, unit 304 outputs the signals at block 306, the generation of control actions, output terminals 308 which is connected to the functional systems of the vehicle. When using a telemetry system for road transport and river vessels of this system light and sound alarm, control fuel injection control air suspension. Railway transport control action is served on the emergency braking system.

When managed by the operator of the facility onboard network standard is and CAN BUS patentable telemetry system can be connected to the onboard computer via block 316 mates with the connector 318, made in the standard CAN BUS. In the side chain may be passed information about the current level of alertness of the operator, enabling the audible alarm, the activation of driver button 314 confirm wakefulness, information about the provision of signals to block 306 generation of control actions. In addition, the side chain may receive information about the state of the control system wakefulness (e.g., malfunction, loss of contact telemetry sensor with the skin of the operator's hand, the battery discharge sensor and other nereglamentnom situations in the system).

The algorithm of functioning of the system is shown in figure 2.

At power-up (p) is a self-test of the stationary part of the system (p), in the process that verifies the correct operation of its units. When errors are detected, the message (p), then the driver decides (p) regarding further use of the system to continue operation of the system (p) or disable (item 75).

If the self test is successful, check signal from the sensor 10 (item 62). In that case, if the signal is missing, the system returns to the loop self-test (p). When the signal light is illuminated reception (p) and analyzes the received given the s (p). In the case of error detection (p), a message which has passed the sensor 10 or the receiver 20, the error message (p). After that, the driver decides (p) regarding further use of the system: to eliminate the cause of the error and continue the operation of the system (p) or disable the system (item 75).

In the absence of error is the determination of the level of wakefulness (p) and indication (p). Then test the level of wakefulness (p) according to known criteria, its indication (p).

Checks for the presence of warning signs of hypoglycaemia on critical decline in skin resistance (p) in the measurement channel connected to the back side of the wrist (pair of electrodes 103, 104). If there is a critical drop in the resistance G for a short period of time (the criteria described above), then turn on the corresponding led 410 (p). If such a drop is not detected, the system works similar to the prototype, i.e. determines the level of alertness on the physical component of the resistance of the skin.

If the wakefulness level above the critical value, the system returns to item 62 cycle. If the wakefulness level below the critical, the phone sounds an alert tone, Confirm awake” (p). Checked the response of the operator (item 70): if pressed within the specified time button 314.

<> If the button is pressed, the system returns to step (item 62). It also checks the signals from the control vehicle (p) with a group of inputs 312, such as signs of braking, turning, and other. If at least one of these signals is present, the system returns to step item 62. In the absence of such signals is fed to manage the impact on the outputs 308 and a corresponding error message (p). After that, the driver decides (p) regarding further use of the system to continue operation of the system, eliminating the cause of the error (p), or disable the system (item 75).

Thus, the system allows you to simultaneously monitor both the performance level of vigilance and to register harbingers of hypoglycemic shock, thereby enhancing the stability of the human operator.

1. Telemetry system for monitoring the health of the operator, containing the telemetry unit of the sensor, including a first pair of electrodes for registration of electrodermal activity on physical and tonic components connected to connected to each other first logarithmic Converter, analog-to-digital Converter, the driver code parcels and the transmitter connected via radio with the unit stationary part, the output catalogocucina with the display unit, including the control unit display, the outputs of which are connected the unit audible alarm and indicator of the level of wakefulness, characterized in that it additionally means for registering a predictor of hypoglycemia critical decline in the electrical resistance of the skin, is made in the form of the second pair of electrodes connected to the second logarithmic Converter, while the analog-to-digital Converter is two-channel, to its inputs connected to the outputs of the both mentioned logarithmic converters, and the display unit includes an indicator predictor of hypoglycemia on critical drop in the electrical resistance of the skin, connected to the output of the control unit display.

2. The system according to claim 1, characterized in that the first pair of electrodes has means for galvanic coupling with the inner surface of the skin of the wrist or finger, and the second dorsal area of the hand or wrist of the operator.

3. The system according to claim 1, wherein the critical decrease of electrical resistance of the skin, as a harbinger of hypoglycemic shock, consider the magnitude of the drop in the electrical resistance of the skin in the range from 1.5 to hundreds of times over a period of time not exceeding one minute.

4. The system according to claim 2, characterized in that the block the remote sensor is designed as one with the electrodes of the second group unit with stowage and securing the hand of the operator.

5. The system according to claim 3, characterized in that the block the remote sensor is designed as one with the electrodes of the second group unit with stowage and securing the hand of the operator.

6. The system according to claim 2, characterized in that the tool mounting block the remote sensor on the hand of the operator is made in the form of gloves or part thereof, and electrodes mounted on the inner surface of the gloves with the possibility of galvanic coupling with the skin of the hands.



 

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