RU20487U1 - VEHICLE DRIVER TELEMETRY CONTROL SYSTEM - Google Patents

Abstract

1. A telemetry system for monitoring the wakefulness of a car driver, containing electrodes with their fasteners, connected to an input device connected to the reception, signal processing and control, and indication units, characterized in that the electrodes and the input device are made as a single telemetry sensor unit with the ability to place and mount on the wrist or on the finger of the driver, the reception, signal processing and control units and the display unit are located in a single unit of the stationary part, The removed telemetry sensor and the reception unit is carried out by radio, the input device contains a logarithmic converter, an analog-to-digital converter, a code transmitter and a transmitter having a transmitting antenna that is the output of the telemetry sensor, the signal receiving unit is made two-channel, with each channel formed connected in series by a receiving antenna, a high-frequency amplifier, a detector, a correlator, the outputs of the correlators are connected an information processing unit connected via an interface to a signal processing and control unit, the receiving antennas being mutually orthogonal polarized, a group of inputs for connecting to the vehicle’s electrical circuits connected to the inputs of the signal processing and control unit, and an on-board interface unit to the outputs a car computer, a control action generation unit and an interface for communicating with the display unit, the display unit includes an indication control unit, to the output

Description

Telemetry system for monitoring the wakefulness of a car driver

The utility model relates to diagnostic tools for the psychophysiological state of a person in the process of professional activity and can be used in automatic control systems for drivers of vehicles.

It is known that transport safety is primarily determined by the psychophysiological state of the driver. Being in the stage of fatigue, under the influence of stressful situations or in a state of alcoholic (narcotic) exposure, the driver loses an objective picture of the road situation, being a source of road traffic accidents.

A large number of inventions are described relating to counteracting getting behind the wheel of a vehicle both an initially inoperable driver and a driver who loses working capacity while driving. So, it is known the use of gas analyzers to determine the alcohol vapor during the breath of the driver, preventing the engine from starting (EP 1024746 A1, Smart Start Inc., АВВ 5/097, ... В60К 28/06, 08/09/2000) 1, use of speech recognition systems driver (RU 2148505, CJSC "NEUROKOM, V60K 28/06, 05/10/2000) 2 for the same purposes. Systems are also known that use as a performance criterion a time analysis of the degree of compression of the steering wheel by the driver (WO 00/55000 A1, Fahrertraining ..., B60K 28/06, 09/21/2000) 3, in the extreme case of diagnosing the death of the driver (WO 00 / 18012, Gustav Magenwirth, NPZK 17/975, B60K 28/04, 03/30/2000) 4.

The process of transition to a drowsy state during movement is proposed to be fixed by the frequency of movement of the eyelid (US 5469143, Cooper, G08B 21/00, 340/575, 11/21/1995; WO 00/24309 Al, Renault, A61B 3/113, 04.05.2000 )5. Another direction of monitoring the driver’s state during movement is to fix its physiological parameters - electroencephalograms, electromyograms and electrooculograms, as well as their joint analysis (WO 00/44580 A1, Compumedics Sleep. PTY. Ltd, B60K 28/02, / 06, 03.08. 2000) 6. Functional status monitoring may

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be effectively used to maintain operability, for example, in monotony conditions, when the operator loses his vigilance (see RU 2111134 C1, NEUROKOM, 60 K 28/06, 1998) 7.

One of the most informative criteria for transitioning to a driver’s loss of working state is a change in the skin-galvanic reaction (RTJ 2107460 C1, NEYROKOM, A61B 5/05, 5/103, 5/18, 03/27/1998; US 6167299, Galchenkov et al., NEUROCOM, 600/547, 12/26/2000 - Patents-analogues) 8. A device for implementing the method comprises electrodes with their mounting means connected to an input device, means for suppressing impulse noise, means for isolating a signal in the phase band of electro-dermal activity, means for detecting pulses of a phase component, a registration unit. Means for isolating the signal in the phase component band, means for suppressing impulse noise, and means for detecting pulses of the phase component are made in the form of a low-pass filter, a unit for converting the input signal to the first and second time derivatives, and a pulse shape analysis unit, connected in series to This input of the latter is connected to the input of the registration unit.

The known device 8 does not affect the technical aspects of adapting the device for automobile transport, ensuring stable telemetry and maintaining wakefulness without creating additional inconvenience to the driver, which is the technical result of the invention.

The technical result of the patented object is ensured by the fact that the telemetric system for monitoring the wakefulness of a car driver contains electrodes with means for their fastening, connected to an input device connected to the reception, signal processing and control units, an indication unit. The electrodes and the input device are made in the form of a single telemetric sensor unit with the possibility of placement and mounting on the wrist or on the finger of the driver. The reception, signal processing and control units and the display unit are located in a single unit of the stationary part, while the said telemetry sensor and the reception unit are connected via a radio channel. The input device contains a logarithmic converter, an analog-to-digital converter, a code parcel driver, and a transmitter having a transmit antenna that is the output of the telemetry sensor in series. The signal receiving unit is made two-channel, with each of the channels formed by a series-connected receiving antenna, high-frequency amplifier, detector, correlator. The outputs of the correlators are connected to an information pre-processing unit, connected via an interface to a signal processing unit, and the receiving antennas are mutually orthogonal polarized. A group of inputs is connected to the inputs of the signal processing and control unit for connecting to the corresponding electrical circuits of the vehicle, and to the outputs are a unit for interfacing with the on-board computer of the vehicle, a block for generating control actions, and an interface for communication with the display unit. The display unit includes a display control unit, to the outputs of which an audible alarm unit and an alert level indicator are connected.

The system can be characterized by the fact that the telemetry sensor unit is made in the form of a bracelet, watch or ring.

The system can also be characterized by the fact that the stationary part unit has a front panel on which there is a radio signal reception indicator from the telemetry sensor unit, an awake level indicator, an awake confirmation button, and a power switch for the device.

The invention is illustrated in the figures, where:

in FIG. 1 shows a block diagram of a patented wakefulness control system.

in FIG. Figure 2 shows an embodiment of the system.

The system comprises (see FIG. 1) a telemetry sensor 10, a telemetry sensor signal receiver 20, a controller 30, and an indication device 40. The telemetric sensor 10 is designed to receive information about the relative change in skin resistance of the driver, converting this information into code packages and transmitting them over the radio channel of the gigahertz frequency range to the signal processing subsystem of the telemetric sensor. The telemetry sensor 10 is located on the wrist or on the finger of the driver. It can be made in the form of a bracelet, watch or ring.

The telemetry sensor 10 has electrodes 102, 104 having electrical contact with the driver’s skin and connected to the input of the logarithmic transducer 106. The output of the transducer 106 is connected to an analog-to-digital converter (ADC) 108, the output of which is connected to the input of the code packet generator 110, the output of which connected to the transmitter 112 connected to the transmitting antenna 114. The sensor 10 is powered by a built-in replaceable autonomous element.

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

For this purpose, the controller 30 has an interface 302 connected to the control and digital signal processing unit 304. Block 304 is connected to a control action generating unit 306 having a series of respective output terminals 308 for connection to various vehicle systems. To one of the inputs of block 304, a block of input signals from a vehicle 310 is connected, having a group of inputs 312 for connecting to the corresponding electrical circuits of the vehicle, for example, braking, turn indicators, and others. A block wake confirmation button 314 is also connected to block 310. To connect the unit 304 to the on-board computer of the vehicle, an interface unit 316 is introduced, the input of which is connected to the unit 304, and the output has a corresponding connector 318. In addition, the unit 304 is connected to the interface 320 for communication with the display device 40.

The display device 40 is connected to the interface 320 via an interface 402 connected to the display control unit 404 having corresponding outputs. These outputs are connected to the block 406 sound alarms and the indicator 408 level of wakefulness, showing the level of wakefulness of the driver on a conventional scale.

Interfaces 220, 302, 320 and 402 can be organized according to the RS23 2C standard or another used on a vehicle.

paired part 50 and telemetric sensor 10, made in the form of a watch. The stationary part 50 contains the blocks of the controller 30, the receiver 20 and the indicating device 40. The stationary part has a front panel 52, on which the wake level indicator 408, the wake confirmation button 314, the device power switch 54, the radio signal reception indicator 56 are placed.

The device operates as follows.

The current through the skin of the hand indicated in FIG. 1 as resistance G, connected to electrodes 102, 104, is converted by a logarithmic converter 106 into voltage and fed to the input of the ADC 108, which measures the current resistance value. The signal from the output of the ADC 108 is fed to the shaper software code parcels, which controls the modulation of the transmitter 112 of the radio channel. Information on connecting electrodes 102, 104 to the driver’s body, battery voltage, and the onset of test mode is also transmitted in the code packages.

The receiver 20 of the signals of the telemetric sensor 10 is designed to receive signals of the telemetric sensor over the air, its preliminary processing and issuance upon request of the controller 30 of the system. In addition, the receiver 20 detects the presence of a second working telemetry sensor in the system coverage area and informs the system controller 30 about this. Such information is necessary in the case of the presence of a shift driver in the vehicle cabin, also having a similar individual telemetry sensor

The receiver 20 of the telemetry sensor signals receives high-frequency pulse-modulated signals through two independent channels with mutually orthogonal polarization of the receiving antennas 202, 204. After amplification (blocks pos. 206, 208), detection (pos. 210,212) and amplitude normalization, the input signal for each of channels arrives at the inputs of channel correlators 214,216. From the output of the said correlators, the digital values of the correlation function of the input signal are fed to the input of the telemetry sensor information preprocessing unit 218. The channel for processing the current package of the telemetry sensor is selected by the maximum value of the correlation function on the interval of the start bit of the package.

The boots are analiruig received from the receiver 20 signals corresponding to the measured value of the skin resistance. Based on this analysis, taking into account the well-known criteria of wakefulness according to the skin-galvanic reaction 8, block 304 determines the level of wakefulness of the driver.

In addition, the control and digital processing unit 304 analyzes the error signals received from the receiver 20. These errors include:

a) the lack of contact of the electrodes 102,104 with the skin of the driver,

b) the closure of the electrodes 102, 104 to each other,

c) the absence of a radio signal from the sensor 10,

g) the presence of the second enabled sensor 10,

d) malfunctioning of the receiver 20.

The operation algorithm of block 304 provides, in the presence of the mentioned errors, the supply of a certain signal to block 404 indication control, which puts the indicator in a special mode of operation (for example, blinking), or gives an audio signal through block 406.

In accordance with the level of wakefulness, an indicator status code 408 is received at the input of the display device 40 through the interface 320. The display control unit 404 includes the required number of indicator elements (for example, LEDs) and, upon a critical decrease in the level of wakefulness, sends a signal to the audible alarm unit 406. The audible alarm requires the driver to press the wake confirmation button 314. If the driver pressed the button 314 or the block 310 of the input signals from the vehicle registered a signal at any of the inputs 312, the entire system continues to work as before. In the event that there is no signal confirming wakefulness from the output 310 to block 304, block 304 receives signals to control actions generation block 306, the output terminals 308 of which are connected to the vehicle’s functional systems (for example, an alarm, an audio signal for alerts for other road users, fuel injection control system, air suspension control, and driver activation systems).

If the vehicle has an on-board CAN bus network, the patented telemetry system can be connected to the on-board computer of the vehicle via the interface unit 316 via the connector 318, also made in the CAN BUS standard. To the vehicle's on-board network in this

In this case, information can be transmitted about the current level of driver’s wakefulness, the inclusion of an audible alarm, the driver activating the wake confirmation button 314, and information about the issuance of signals to control actions generation unit 306. In addition, information about the state of the wakefulness monitoring system itself (for example, the occurrence of malfunctions, loss of contact of the telemetry sensor with the skin of the driver’s hand, the discharge of the sensor’s battery, and other unregulated situations in the system’s operation) can be displayed on the on-board network.

The operation of the entire system, with the exception of the telemetry sensor, is provided by a secondary power source. It converts the constant voltage of the vehicle electrical system into several constant stabilized output voltages (not shown in FIG. 1).

Claims (3)

1. A telemetry system for monitoring the wakefulness of a car driver, containing electrodes with their fasteners, connected to an input device connected to the reception, signal processing and control, and indication units, characterized in that the electrodes and the input device are made as a single telemetry sensor unit with the ability to place and mount on the wrist or on the finger of the driver, the reception, signal processing and control units and the display unit are located in a single unit of the stationary part, The removed telemetry sensor and the reception unit is carried out by radio, the input device contains a logarithmic converter, an analog-to-digital converter, a code transmitter and a transmitter having a transmitting antenna that is the output of the telemetry sensor, the signal receiving unit is made two-channel, with each channel formed connected in series by a receiving antenna, a high-frequency amplifier, a detector, a correlator, the outputs of the correlators are connected an information processing unit connected via an interface to a signal processing and control unit, the receiving antennas being mutually orthogonal polarized, a group of inputs for connecting to the vehicle’s electrical circuits connected to the inputs of the signal processing and control unit, and an on-board interface unit to the outputs a car computer, a control action generation unit and an interface for communicating with the display unit, the display unit includes an indication control unit, to the output whose odes are connected to the sound alarm unit and the wake level indicator.  2. The system according to claim 1, characterized in that the telemetry sensor unit is made in the form of a bracelet, watch or ring. 3. The system according to claim 1, characterized in that the stationary part unit has a front panel on which there is a radio signal reception indicator from a telemetry sensor unit, an awake level indicator, an awake confirmation button, a power switch of the device.