KR20180059087A - Appratus for preveinting drowsy driving - Google Patents

Abstract

The present invention relates to an apparatus for preventing drowsy driving. The apparatus for preventing drowsy driving according to the present invention comprises: an information collecting portion for collecting bio-information of a driver or vehicle driving information; a drowsiness determination portion for detecting whether the driver is in a drowsy state by receiving the bio-information or the vehicle driving information; and an air plasma generating portion for continuously or periodically irradiating a pulse laser beam on a space one point around the driver to generate air plasma when the drowsiness determination portion determines the driver to be in the drowsy state.

Description

{APPRATUS FOR PREVENTING DROWSY DRIVING}

The present invention relates to a drowsiness driving prevention device, and more particularly, to a drowsiness driving prevention device capable of preventing an driver from drowsy by generating air plasma by irradiating a laser to the air.

In modern society, automobiles are exploding because of the increase of income and the pursuit of convenience of consumers. As a result, casualties due to traffic accidents are increasing. To reduce traffic accident casualties, various safety devices are added to cars.

In particular, devices are being developed to detect drowsy driving. For example, Korean Patent Laid-Open Publication No. 10-3013-0009158 discloses a technique for detecting a departure from a left lane or a right lane of a vehicle in the running state of an automobile and alerting the driver to the driver's attention to prevent a safety accident , And the registered patent No. 617777 discloses a driver's eye warning device for rapidly detecting an eye image of a driver in a driver's image input from a camera using an eye search template having a structure similar to that of a driver's eye stored in advance. An image detecting apparatus and method are disclosed.

However, these conventional methods use vibration or voice warning to prevent the driver from drowning.

However, when the steering wheel is vibrated, the driver who is surprised by the sudden vibration can manipulate the steering wheel in an unintended direction, which can cause serious side effects.

In addition, there is a problem in that it is not effective for drowsiness when using voice.

Therefore, it is necessary to study how to effectively wake the driver when drowsy driving is detected.

Korean Patent Publication No. 3013-0009158 (published on March 30, Korean Patent Registration No. 10-0617777 (published on Aug. 28, 2007)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drowsiness driving prevention device capable of effectively preventing drowsiness of a driver of a motor vehicle.

It is another object of the present invention to provide a drowsiness driving prevention device capable of preventing drowsiness driving by inducing a driver's sense of body.

The technical problem to be solved by the present invention is not limited to the above-mentioned technical problems, and various technical problems can be included within the scope of what is well known to a person skilled in the art from the following description.

In order to solve the above problems, an apparatus for preventing drowsiness driving according to the present invention includes an information collecting unit for collecting bio information or vehicle driving information of a driver; A drowsiness determination unit for receiving the bio-information or vehicle driving information and detecting whether the driver is drowsy; And an air plasma generator for generating an air plasma by continuously or periodically irradiating a pulsed laser to one point of a space around the driver when the drowsiness determination unit determines that the user is in a drowsy state.

The apparatus for preventing drowsiness according to the present invention may further include a lens for collecting the laser beam irradiated from the air plasma generator to one point to induce air plasma generation.

Further, in the drowsiness prevention device according to the present invention, the air plasma generator may include a laser output unit for outputting the pulse laser; And a control unit for controlling the laser output unit to output the pulse laser when it is determined that the laser diode is in the drowsy state.

Further, in the drowsiness prevention apparatus according to the present invention, the controller may include: a frequency controller for controlling the pulse frequency per unit time of the laser; An energy controller for controlling an energy intensity of the laser; And a diameter control unit for controlling the diameter of the laser.

In addition, in the drowsiness prevention apparatus according to the present invention, the air plasma generator may be installed in the backrest of the driver's seat or in the inside of the driver's seat so as to generate air plasma in the empty space between the backrest and the headrest.

In addition, in the drowsiness prevention apparatus according to the present invention, the air plasma can generate a shock wave and an electric field, and can induce a somatic sensation of the human skin existing in a region affected by the shock wave and the electric field.

In addition, in the drowsiness prevention device according to the present invention, in the drowsiness prevention device according to the present invention, the shock wave stimulates the details in the human body skin to generate action potentials to the peripheral nerve, can do.

In addition, in the drowsiness prevention apparatus according to the present invention, the electric field induces the intracellular potential of the human skin, and induces an action potential in the peripheral nerve stimulated by the generated potential to induce a change in the state of the human skin .

Further, in the drowsiness prevention device according to the present invention, the wavelength of the pulse laser may be 1064 nm.

Further, in the drowsiness prevention device according to the present invention, the energy intensity of the pulsed laser may be 35 mJ to 65 mJ.

According to the present invention, it is possible to prevent the driver from drowsing by sensing the driver's drowsiness driving and inducing the driver's sense of body.

In addition, according to the present invention, since the laser is not directly applied to the skin tissue of the user, the somatic sensation can be induced without damaging the skin tissue.

In addition, according to the present invention, since different energy of the sun emitted by the air plasma can be utilized, the body sensation can be induced by different mechanisms.

Also, according to the present invention, there is an effect of inducing a somatosensitivity to all the medium existing in a region close to the point where the air plasma is generated.

1 is a block diagram of an apparatus for preventing drowsiness in accordance with the present invention.
2 shows a schematic concept of an air plasma according to the present invention.
3 is a block diagram of an air plasma generator according to the present invention.
4 and 5 illustrate a process in which a user recognizes a somatosensory sensation by an air plasma according to the present invention.
6 shows an example in which air plasma is generated around a driver's seat in a vehicle according to the present invention.
7 shows the result of measuring the shock wave using a microphone.
8 shows the result of measuring the shock wave using an acceleration sensor.
9 shows an experimental environment for measuring shock waves in an area close to the air plasma.
FIG. 10 shows a result of measurement through a microphone in the experimental environment of FIG. 9. FIG.
FIG. 11 shows the results of measurement by the acceleration sensor in the experimental environment of FIG.
FIG. 12 shows the intensity distribution of the shock wave measured in the experimental environment of FIG.
13 shows an experimental environment for measuring an electric field.
14 shows the electric field measured according to the energy intensity of the laser beam.
FIGS. 15 and 16 show the measurement results of the electric field by changing the parameters of the laser beam.
17 shows experimental results for confirming whether the user's sense of body is sensed according to the distance from the air plasma.

DETAILED DESCRIPTION OF THE EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

The embodiments disclosed herein should not be construed or interpreted as limiting the scope of the present invention. It will be apparent to those of ordinary skill in the art that the description including the embodiments of the present specification has various applications. Accordingly, any embodiment described in the Detailed Description of the Invention is illustrative for a better understanding of the invention and is not intended to limit the scope of the invention to embodiments.

The functional blocks shown in the drawings and described below are merely examples of possible implementations. In other implementations, other functional blocks may be used without departing from the spirit and scope of the following detailed description. Also, although one or more functional blocks of the present invention are represented as discrete blocks, one or more of the functional blocks of the present invention may be a combination of various hardware and software configurations that perform the same function.

In addition, the expression "including any element" is merely an expression of an open-ended expression, and is not to be construed as excluding the additional elements.

Further, when a component is referred to as being connected or connected to another component, it may be directly connected or connected to the other component, but it should be understood that there may be other components in between.

1 schematically shows a configuration of a drowsiness prevention device according to the present invention.

1, the drowsiness prevention apparatus of the present invention includes an information collecting unit 10, a drowsiness determining unit 20, and an air plasma generating unit 30, and additionally includes a lens 40 ).

The information collecting unit 10 collects driving information of a driver and driving information of a vehicle and may include a camera 11, a heartbeat measuring unit 12, and a traveling information measuring unit 13. All of these three configurations may be included, and some configurations may be omitted as necessary.

The camera 11 is installed inside the vehicle and photographs the face of the driver and transmits the image to the drowsiness determination unit 20. The camera 11 may be disposed at a suitable position where the driver's face and eyes can be photographed. For example, at a position such as a handle or a windshield frame.

The heartbeat measuring unit 12 detects the heartbeat number of the driver and transmits a heartbeat signal corresponding to the detected heartbeat to the sleepiness determining unit 20. [ The heartbeat measuring unit 12 may be formed in a wearable form or a form mounted on a vehicle. For example, the heartbeat measuring unit 12 may include a plurality of electrodes provided on the steering wheel. When the right and left hands of the driver come into contact with the electrodes respectively, a potential difference corresponding to the driver's electrocardiograph occurs between the two electrodes. The heartbeat measuring unit 12 acquires the heartbeat signal of the driver by detecting the potential difference generated between these two electrodes .

Alternatively, a pulse wave sensor in the form of a wristwatch, a ring, or the like may be attached to the driver to detect a heartbeat signal (a signal corresponding to a heartbeat signal).

The traveling information measuring unit 13 measures the traveling state of the vehicle using various sensors (steering sensors, torque sensors, etc.) installed in the vehicle and transmits the result to the drowsiness determination unit 20. For example, the travel information measuring unit 13 measures a steering angle (degree of steering) of the vehicle and lateral position of the vehicle, and transmits a signal (vehicle signal) indicating the traveling state of the vehicle to the drowsiness determination unit 20.

The drowsy state determination unit 20 receives various types of information on the driver and the vehicle state from the information collection unit 10 and determines whether or not the driver is in a drowsy state.

For example, in the case of receiving a photographed image from the camera 11, it is possible to determine the driver's sleepiness by analyzing the pupil image of the driver. The driver's pupil region is detected from Haar-like feature from the photographed driver's face, the detection rate of the detected pupil region is increased using the AdaBoost learning algorithm, and the binarization of the detected pupil And judging the drowsiness based on the pupil size and the circularity through the determination of the symmetry. If the detected perimeter or area of the pupil is smaller than the perimeter or area of the predetermined pupil, it can be judged as a drowsy state.

In addition, the drowsiness determination unit 20 may determine drowsiness using heart rate measurement information. For example, if the driver's heart rate falls below a certain level, it can be judged to be in a drowsy state.

In addition, the drowsiness determination unit 20 can determine whether or not the user is drowsy using the vehicle state signal. For example, if the vehicle does not travel normally, moves in a zigzag pattern, or travels through a lane without driving to a normal lane, it can be judged to be in a drowsy state.

As described above, the drowsiness determination unit determines whether or not the driver is drowsy based on the bio information of the driver and the state information of the vehicle, and transmits the drowsiness determination unit 30 to the air plasma generation unit 30.

The air plasma generator 30 receives a signal indicating whether the driver is drowsy, and generates an air plasma by irradiating a laser beam when receiving a drowsy signal. The air plasma can induce somesthesia in the user's skin.

2 shows a conceptual diagram of the air plasma generating section 30 generating air plasma.

The air plasma generator 30 irradiates a laser beam to the air to generate plasma. At this time, various parameters of the laser beam can be controlled, and the intensity, size, and duration of the plasma can be controlled. The wavelength of the laser beam may be 1064 nm and the energy intensity of the laser beam may be 35 mJ to 65 mJ. If the intensity of the laser beam is less than 35 mJ, somatic sensation may not be induced or may not be sensed by a weak person, and if it exceeds 65 mJ, it may be harmful to the human body. Above 68mJ in particular, it may cause direct damage to human body.

The air plasma generator 30 may further include a lens 40 for generating an air plasma. The lens 40 functions to collect the laser beam irradiated from the air plasma generator 30 at one point. The lens may be provided in the air plasma generator 30, (30).

Plasma refers to the state of gas separated by electrons and electrons having positive charges at ultra-high temperatures. In order to generate a plasma, an electric method such as a direct current, a very high frequency, or a laser is used. In the present invention, it is assumed that a pulsed laser is irradiated at one point in the air to generate plasma. In the present invention, plasma is generated in the air. In the present specification, it is referred to as an air plasma (AP). Such an air plasma can induce somesthesion of the driver within a predetermined distance, thereby preventing the driver from drowsy.

3 is a block diagram showing the detailed configuration of the air plasma generator 30. As shown in Fig.

3, the air plasma generating unit 30 may include a laser output unit 31, a power source unit 32, an input unit 33, a display 34, and a control unit 35. In order to implement the air plasma generator 30 at this time, the laser output unit 31 and the control unit 35 are essentially included, and other functional units can be included or excluded according to the needs of the user.

The laser output unit 31 may include a laser driver and a cooling device for outputting a pulse laser. The laser driver may include sub-devices such as a laser medium, an optical pumping, and an optical resonator, and generates an optical signal for implementing a pulsed laser. In addition, the cooling device cools the heat generated by the laser driver in the process of generating an optical signal, and prevents malfunction due to overheating of the laser driver.

The laser output unit 31 may be implemented in various ways to generate a pulsed laser. For example, a ruby laser, a neodymium: YAG laser, a neodymium: glass laser, a laser diode, an excimer laser, a dye laser, or the like. For reference, it is noted that a neodymium: YAG laser is used to generate a pulse laser in the experimental example described below.

The power supply unit 32 can supply power to other configurations including the air plasma generator 31.

The input unit 33 receives a setting input necessary for driving the air plasma generator 31 from a user. The input unit may be implemented by various types of input devices such as a pad, a touch screen, and a mouse.

The display 34 is a configuration for displaying various information such as a setting parameter of a laser or the like to display an operation state and an operation result of the air plasma generator 30. The display may display various menus, information input by a user, information to be provided to a user, and may be implemented by a liquid crystal display (LCD), an OLED, and a sound output device.

The control unit 35 receives a temperature value sensed by the temperature sensing unit 35 and controls the laser output unit 31 to generate an air plasma by outputting a laser when the received temperature is equal to or higher than a predetermined temperature have. The control unit 35 may include at least one computing means and a storage means, wherein the computing means may be a general purpose central processing unit (CPU), a programmable device element (CPLD, FPGA ), An application specific integrated circuit (ASIC), or a microcontroller chip. In addition, a volatile memory element, a non-volatile memory element, or a non-volatile electromagnetic storage element may be utilized as the storage means.

The control unit 35 may include a frequency control unit, an energy control unit, and a diameter control unit. The control unit 35 may control the pulse laser to be continuously or periodically irradiated to generate an air plasma of a desired shape.

Specifically, the frequency control unit controls the pulse frequency per unit time of the irradiated laser. Assuming that the output of the laser is one cycle when the output of the laser is high and one time when the laser is low, the frequency controller may include a pulse cycle of unit time, for example, several pulses per second And the user can control the frequency of the pulsed laser through such a setting operation.

It should be understood that the pulse laser frequency in the present invention is freely controllable from 1 Hz to 50 Hz. Further, if the frequency is 0 Hz, that is, a single shot, Can be set.

Next, the energy control unit controls the energy intensity of the irradiated laser. The energy intensity is expressed in millijoules (mJ), and the energy intensity in the present invention can preferably be controlled to be 40 mJ or more. On the other hand, the energy control unit may be actually implemented by an optical filter, which may include an attenuator for attenuating the intensity of the pulsed laser.

Next, the diameter control unit controls the diameter of the irradiated laser or focuses the laser accurately on a target point to be irradiated.

The diameter control unit can be embodied as a convex lens for converging the laser to one point and a concave lens for diffusing the laser. By selectively adjusting the distance between the convex lens and the concave lens, Can be controlled.

In addition to the air plasma generator 30, the drowsiness prevention device according to the present invention may further include a lens 30 for generating an air plasma. The lens 30 functions to collect the laser beam irradiated from the air plasma generator 30 at one point. The lens 30 may be provided in the air plasma generator 30, (30).

With this configuration, the air plasma generating section 30 can generate air plasma in a specific space inside the vehicle. Further, the size, shape, and duration of the air plasma can be controlled. When an air plasma is generated around the driver, shock waves and electric fields caused by the air plasma can induce the driver's sense of body and prevent drowsiness.

Referring again to FIG. 2, the drowsiness prevention device according to the present invention can generate an air plasma in the air and utilize the energy released thereby to induce a somatic sensation in the medium 40, that is, the skin of the user .

On the other hand, in the air plasma generated in this way, energy is emitted in two kinds of shock waves and electric fields.

A shock wave is a strong pressure wave that is transmitted at a speed faster than a sonic velocity into a fluid. The shock wave is generated by superimposing a wave surface due to a sudden pressure change. When a shock wave passes through it, pressure, density and speed increase. That is, the energy emitted from the air plasma rapidly transfers energy to the surrounding fluid, that is, the air, and the air thereby repetitively generates the overlap region, thereby enabling energy transfer to the outside.

On the other hand, an electric field refers to a field generated in an ambient space of an electric charge. In an electric field, a charged object receives an electric force and a state change occurs. Since the air plasma itself is a charged gas, an electric field is generated around the air plasma, and the present invention uses this to induce a state change in the medium 50.

Hereinafter, a method of inducing somatosensory using air plasma according to the present invention will be described with reference to FIGS. 4 and 5. FIG.

FIG. 4 is a graph showing the relationship between the energy of the shock wave and the electric field transmitted to the user's skin when the shock waves and the electric field are emitted by the air plasma, and when the transmitted energy changes state to the skin, The process of recognizing the senses is briefly shown.

FIG. 5 is a step-by-step representation of the procedure of FIG. Referring to FIG. 5, the somatosensory induction method using air plasma starts from the step S51 of irradiating the pulse laser first. The pulse laser is irradiated by the air plasma generator described in the description of FIG. 2. The pulse laser may further include a step of setting a parameter of the laser beam before the step S51. The step of setting the parameters of the laser beam means the step of the air plasma generator receiving the input from the user and setting the parameters of the laser beam to be irradiated in the air according to the input.

After the step S51, the irradiated pulse laser generates air plasma in the air (S52). In the air plasma thus generated, the shock wave and the electric field are generated to the outside. (S53, S54)

The generated shock waves stimulate the skin, that is, the cells constituting the skin by touching the skin of the user, that is, stimulating the peripheral nerve in the cell (S56), and accordingly, the activation of the action potential (S57) (S58), and the brain senses the somatic sensation (S59).

On the other hand, the electric field generated from the air plasma affects the cells constituting the skin of the user, and the electric field generates a potential difference in the cell (S55) to stimulate the peripheral nerve of the cell (S56). Steps S56-S59 from the peripheral nerve stimulation to the somatic sensory perception step in the brain are the same as those in the shock wave described above.

At this time, the sense of driving induced by the air plasma is strong enough to feel the stiffness, which is sufficient for the driver to break the drowsiness.

Accordingly, the air plasma generating unit 30 can be disposed around the driver to guide the driver's body sensation.

6 shows an example in which the air plasma generator 30 is disposed in a car chair. 6, the air plasma generator 30 is installed in the headrest A or the backrest B of the automobile chair to generate an air plasma AP in an empty space between the headrest and the backrest, can do. When the air plasma (AP) is generated, a sense of body sensation can be induced to a driver within a predetermined distance from the air plasma. Therefore, if it is determined that the driver is in a drowsy state, air plasma can be generated to prevent the driver from drowning.

7 shows the results of measurement of the shock wave generated in the air plasma.

7 (a) shows a result of measuring a shock wave sensed by a microphone after converting a voltage signal into a voltage signal after providing a microphone at a certain point within a radius of 50 mm based on a point where the air plasma is generated. According to this, it can be confirmed that a voltage signal of a predetermined magnitude is repeatedly detected from 0.5 ms after the air plasma is generated at 0.3 ms. The experimental result shows that the shock waves generated by the air plasma are continuously As shown in FIG. 6 (a), it can be seen that the intensity of the shock wave generated by the air plasma becomes weaker with time.

As the energy intensity of the laser beam increases, the shock wave generated by the air plasma can also be expected to increase in size. Experimental results are shown in (b) and (c). That is, when air plasmas are generated by setting the energy intensities of the parameters of the laser beam to 32 mJ and 60 mJ, respectively, the shock wave sensed by the microphone can be expressed as shown in FIGS. 7B and 7C, The higher the strength is, the higher the strength is.

On the other hand, the shock wave generated by the air plasma can be measured not only by a microphone but also by using an acceleration sensor. 8 is a graph comparing the results of measurement of shock waves with an acceleration sensor and a microphone. The graph shows that the magnitude of the voltage signal of the shock wave measured by the acceleration sensor is relatively small compared to that measured by the microphone, but the resultant values show a similar pattern.

In the meantime, since the shock wave and the electric field generated by the air plasma can affect all directions around the generation position of the air plasma, the body sense, that is, the human skin, If the distance is kept below a certain level, somatic sensation can be induced regardless of the direction. In other words, the shock wave and the electric field generated from the air plasma can induce a state change of the medium existing on a certain point in the hypothetical center around the generation position of the air plasma.

FIG. 9 shows an experimental environment for confirming such a characteristic. In the experimental environment, an octagonal frame is provided around the point where the air plasma is generated, and a microphone is installed on all the surfaces except for the lower end. At this time, the position of the microphone is spaced the same distance from the center.

FIG. 10 shows the results measured in the experiment of FIG. 9, and the graphs of FIG. 7 show the intensity of the shock wave measured in all directions by the magnitude of the voltage signal. As can be seen from the graph, the shockwave was measured in all directions. Especially, the shock waves in each direction were measured more as the energy level of the laser beam was larger, and the stronger the shock wave was measured as closer to the center from the air plasma.

FIG. 11 is a graph showing intensity of shock waves measured after changing a microphone to an acceleration sensor in the experimental environment of FIG. 9, and shock waves in all directions affect the acceleration sensor in a similar pattern even when the graphs of FIG. 11 are viewed. .

On the other hand, FIG. 12 is a graph showing the intensity distribution according to the distance of the shock wave measured in each direction. 10, the intensity of the shock wave in each direction is inversely proportional to the distance to the air plasma. As can be seen from FIG. 12, the intensity of the shock wave is more strongly measured as the distance from the air plasma is shorter .

From the results of the experiments of FIGS. 10 to 12, it can be concluded that the shock wave generated by the air plasma affects all directions, and thus the somatic sensation can be induced to the medium located at any arbitrary point, And the degree of somatic sensation that can be induced according to the distance of the air plasma, that is, the intensity of the tactile sensation, can be changed.

13 shows an experimental environment for measuring an electric field generated by the air plasma. In the experimental environment, the electrode plate is provided above and below the point where the air plasma is generated, and the electrode plate is connected with a wire, but connected in series with a voltmeter.

FIG. 14 is a graph showing the voltage signals of the electric field measured when the energy intensities of the laser beams are 32 mJ and 60 mJ, respectively. According to this, the peak-to-peak voltage was measured at about 20 V in a 32 mJ environment and about 30 V in a 60 mJ environment Able to know. That is, the higher the energy of the laser beam is, the stronger the intensity of the electric field generated by the air plasma is.

FIG. 15 is a graph showing the minimum peak value, the peak-to-peak value, and the power value of the electric field voltage signal measured while varying the energy intensity of the laser beam, i.e., the plasma energy, while maintaining the DC potential of FIG. . As the energy value increases, the peak-to-peak value and the power value increase proportionally. The minimum peak value is continuously decreased in the graph, but this eventually indicates that the potential difference increases. The graph shows that the intensity of the electric field increases with increasing energy of the laser beam.

FIG. 16 is a graph showing a voltage signal of an electric field when the magnitude of the potential changes. Specifically, FIG. 16 shows the measured electric field when the plasma generation energy shown in FIG. 13 is kept constant and the DC potential applied to the copper plate is changed. In the future, when air plasma is used for humans, that is, a certain amount of electric potential is given to the skin and plasma is generated in the vicinity of the skin, tactile sensation is generated, and various tactile sensations may be caused by controlling the frequency and size of plasma It is the data that can be inferred that there is.

Similar to the result shown in FIG. 15, the peak, the peak-to-peak value, and the power value are increased as the potential difference between the electrode plates increases. Respectively.

FIG. 17 shows experimental results for measuring the extent to which a person can sense a somatic sensation according to the energy intensity value of the laser beam.

According to this, the results were obtained by monitoring whether or not a plurality of subjects could feel somatosensory or tactile sensation according to the distance from the air plasma. The subjects placed their fingers apart from the air plasma at intervals of 1 mm, The experiment was done in answering way.

It can be seen that when the energy intensity of the laser beam is 35 mJ, the laser beam can feel a touch to the point 5 mm away from the center, about 8 mm away at 50 mJ, and about 10 mm away at 65 mJ.

That is, as the intensity of the laser increases, the influence of the shock wave and the electric field can be extended to a wider region, which means that the region that can affect the medium can be controlled by controlling the intensity of the laser do.

The environment in which various tactile sensations can be induced by the drowsiness prevention device according to the present invention has been described with reference to the drawings. The embodiments of the present invention described above are disclosed for the purpose of illustration, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention.

10: Information collecting section
20: Drowsiness judgment unit
30: air plasma generator
40: lens
50: medium

Claims (10)

An information collecting unit for collecting bio information or vehicle driving information of the driver;
A drowsiness determination unit for receiving the bio-information or vehicle driving information and detecting whether the driver is drowsy; And
And an air plasma generator for generating an air plasma by continuously or periodically irradiating a pulsed laser to one point of a space around the driver when the drowsiness determination unit determines the drowsy state.
The method according to claim 1,
And a lens for collecting the laser beam irradiated from the air plasma generating unit at one point to induce air plasma generation.
The plasma processing apparatus according to claim 1, wherein the air plasma generating unit
A laser output unit for outputting the pulse laser; And
And a control unit for controlling the laser output unit to output the pulse laser when it is determined that the laser printer is in the drowsy state.
The apparatus of claim 3,
A frequency controller for controlling a pulse frequency per unit time of the laser;
An energy controller for controlling an energy intensity of the laser; And
And a diameter control unit for controlling the diameter of the laser.
The method according to claim 1,
Wherein the air plasma generating unit is mounted in the backrest of the driver's seat or in the inside of the driver's seat so as to generate air plasma in an empty space between the backrest and the headrest.
The method according to claim 1,
The air plasma generates shock waves and electric fields,
Wherein the shock wave and the electric field induce body sensation of the human skin existing in an area affected by the shock wave and the electric field.
The method according to claim 6,
Wherein the shock wave stimulates the details in the human skin to cause an action potential to the peripheral nerve, thereby inducing a state change of the human skin.
The method according to claim 6,
Wherein the electric field generates intracellular potential of the human skin and induces action potentials in the peripheral nerve stimulated by the generated electric potential to induce a state change of the human skin.
The method according to claim 1,
Wherein the pulse laser has a wavelength of 1064 nm.
The method according to claim 1,
Wherein the pulse laser has an energy intensity of 35 mJ to 65 mJ.

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