JP2006232229A - On-vehicle oxygen feed system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle oxygen feed system capable of effectively awakening a driver. <P>SOLUTION: The on-vehicle oxygen feed system comprises a pattern storage unit 7 to store a plurality of oxygen feed pattern models according to the physiologic state of a driver, an individual state detection unit 5 to detect the physiologic state of the driver, a pattern model selection unit to select a oxygen feed pattern model when feeding oxygen into a cabin from the plurality of oxygen feed pattern models based on the detected physiologic state, and an oxygen feed unit 13 to feed oxygen into the cabin according to the selected oxygen feed pattern model. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an in-vehicle oxygen supply apparatus that supplies oxygen, particularly a high oxygen concentration gas, into a vehicle compartment for awakening of a driver.

  From the change pattern of the driver's consciousness, determine whether the consciousness is due to monotonous driving, fatigue or lack of sleep. There is a snooze driving prevention device that stops the device.

  There is also a system in which the above-described apparatus is combined with an automatic driving system and an alarm system that sounds an alarm when the driver's arousal level is lowered.

Japanese Patent Laid-Open No. 06-107031 JP-A-06-171391

However, awakening is performed by repeated warnings or warning awakenings, and the awakening pattern cannot be changed according to the driver's condition, personal characteristics, personal preferences,
It tends to be a very monotonous awakening method.

  The present invention provides an in-vehicle oxygen supply system capable of changing a wake-up pattern according to a driver's personality.

  In particular, in the present invention, oxygen is appropriately supplied into the vehicle compartment in order to improve the driver's attention.

  The present invention provides a pattern storage unit that stores a plurality of oxygen supply pattern models according to a driver's physiological state, an individual state detection unit that detects a physiological state, and supplies oxygen into the vehicle compartment based on the detected physiological state. An on-vehicle vehicle comprising: a pattern model selection unit that selects an oxygen supply pattern model for performing the operation from the plurality of oxygen supply pattern models; and an oxygen supply unit that supplies oxygen into the vehicle compartment according to the selected oxygen supply pattern model An oxygen supply device is provided.

  Further, in order to change the personal identification unit for identifying the driver and the oxygen supply pattern model according to the identified driver, the pattern change data generation unit creates pattern change data, and the pattern change data May be provided in the above-described in-vehicle oxygen supply device. When the pattern change data storage unit does not have pattern change data corresponding to the identified driver, the oxygen supply pattern model may be generated based on a predetermined default value.

  In addition, a vehicle state detection unit that detects the traveling state of the vehicle is further provided, and when the detected traveling state indicates that the vehicle is traveling, the oxygen supply unit supplies oxygen into the vehicle compartment. Good.

  The oxygen supply pattern model may include at least one of an intermittent supply pattern model, a Fourier function pattern model, and a fluctuation pattern model.

  The present invention further includes a step of storing a plurality of oxygen supply pattern models corresponding to the physiological state of the driver, a step of detecting the physiological state, and oxygen when supplying oxygen into the vehicle compartment based on the detected physiological state. There is also provided a vehicle interior oxygen supply method comprising: selecting a supply pattern model from a plurality of oxygen supply pattern models; and supplying oxygen into the vehicle interior according to the selected oxygen supply pattern model.

  The above-described method may further include the step of identifying the driver and the step of changing the oxygen supply pattern model according to the identified driver. Moreover, you may further provide the step which detects the driving state of a vehicle, and the step which supplies oxygen in a vehicle interior, when the detected driving state shows that the vehicle is driving | running | working. A program for causing a computer to execute each of these steps is also included in the present invention.

  In the present application, “supplying oxygen” generally means supplying a gas (high oxygen concentration gas) having a higher oxygen concentration than normal air into the vehicle compartment, and the oxygen concentration is not particularly limited. However, the concentration is selected so as not to harm human health. Of course, the concentration can be variable. Moreover, the production method of the high oxygen concentration gas is not particularly limited.

  In the present invention, the oxygen supply pattern is appropriately changed according to the personality and physiological state of the driver, in particular, the arousal state, so that the driver can be effectively awakened.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows a schematic configuration of an in-vehicle oxygen supply device 100 of the present invention. The in-vehicle oxygen supply device 100 includes a control unit 1, a personal identification unit 3, a personal state detection unit 5, a pattern storage unit 7, a pattern change data generation unit 8, a pattern change data storage unit 9, The vehicle state detection part 11 and the oxygen supply part 13 are comprised.

  The control unit 1 controls the operation of the in-vehicle oxygen supply device 100, and is configured mainly by a processor (not shown) that operates according to a predetermined program. The control unit 2 includes various memories (not shown) such as a memory for storing various programs executed by the processor, a memory serving as a work area at the time of program execution, and a memory for storing various setting data of the oxygen supply device. Yes. As these memories, a plurality of types of memories different in access speed, storage capacity, volatile and non-volatile, and the like are used depending on the application.

  The personal identification unit 3 identifies and recognizes the driver. As an identification method, there is a method of identifying and recognizing an individual from an electronic license or an ID memory 15 mounted on a mobile phone or the like. In addition, an automatic recognition method using image recognition, voice recognition, or the like may be employed, or a predetermined biometric authentication method, authentication by entering a password after boarding, or the like may be used. The method is not limited as long as an individual can be identified and specified.

  The personal state detection unit 5 detects biological state information corresponding to a physiological state such as a fatigue level, arousal level, stress, and physiological indices of a vehicle driver. For example, a method of detecting the degree of arousal by capturing and analyzing an image around the driver's eyeball can be used (eg, Japanese Patent Application Laid-Open No. 2001-198113). Alternatively, the state of the driver may be measured by a method of measuring a skin resistance, a skin temperature, a pulse wave, etc. by attaching a predetermined sensor to the driver's finger or providing a predetermined sensor on the handle (example) : Japanese Patent No. 33566763).

  Various studies and papers have been published on the relationship between physiological indices (biological information) such as heart rate variability, blood pressure, pulse wave, and electrodermal activity, and physiological conditions. For example, “Survey study on applicability of stress measurement technology to safety measures” (edited by the Association for Promotion of Mechanical Systems). The detection method is not particularly limited, and any detection method can be used. In particular, the determination of whether the driver is awake or is in a state close to sleep is important from the viewpoint of driving support, and the degree of arousal is one of the physiological states to be detected.

  The pattern storage unit 7 is for storing various oxygen supply pattern models corresponding to various supply patterns when a high oxygen concentration gas is supplied into the vehicle compartment. The pattern storage unit 7 can be realized using various memories, ROMs, information recording media, and the like, and its configuration is not particularly limited. The supply pattern model accumulated and stored in the pattern storage unit will be described in detail later.

  The pattern change data generation unit 8 generates pattern change data for appropriately changing the oxygen supply pattern model stored in the pattern storage unit 7 according to the driver identified by the personal identification unit 3. The pattern change data storage unit 9 is generated by the pattern change data generation unit 8 and stores various pattern change data corresponding to each driver. Examples of such data will also be described in detail later. The pattern change data storage unit 9 can also be realized by using various memories, ROMs, information recording media, and the like, and its configuration is not particularly limited.

  The vehicle state detection unit 11 detects the running state of the vehicle, detects various physical values related to the vehicle, and determines whether the driver is driving or stopping the vehicle. . There are various determination methods, but as determination criteria, 1) it is determined that the engine is operating if it is operating, 2) it is determined that it is operating if the moving speed is not 0, and 3) the travel distance is If it increases, it is judged that the vehicle is in operation. In general, the criterion 1) is used. The vehicle state detection unit 11 receives information corresponding to the traveling state by wire or wirelessly from vehicle parts such as an engine, and its configuration is not particularly limited.

  The oxygen supply unit 13 is for actually supplying a high oxygen concentration gas generated by an oxygen generation unit (not shown) or a part of the oxygen supply unit 13 itself into the vehicle compartment according to the selected oxygen supply pattern model. Is. From the mechanical point of view, it is equipped with an oxygen supply port, oxygen supply pipe, oxygen supply valve and the like. The configuration and type of the supply unit 13 are not limited to specific ones, and various units and devices can be used.

  As a method for producing a high oxygen concentration gas, 1) a method in which oxygen sealed in a high pressure gas cylinder as a liquefied gas is diluted with normal air so as to have a predetermined concentration, and 2) a molecular sieving action such as zeolite. 3) Obtaining by using the adsorption characteristics of adsorbents for nitrogen by alternately repeating pressurization and depressurization. 3) Obtaining by using the difference in gas permeation rate by polymer membrane (oxygen-enriched membrane module). 4) A method obtained by a reaction between a chemical substance containing oxygen such as sodium percarbonate and water. Of course, the generation method is not particularly limited. Further, the configuration and type of the generation unit are not limited to specific ones, and various units and devices can be used.

  In the present application, “supplying oxygen” generally means supplying a gas (high oxygen concentration gas) having a higher oxygen concentration than normal air into the vehicle compartment. The oxygen concentration is not particularly limited, but a concentration that does not harm human health is selected. A mechanism that enables concentration adjustment may be provided separately.

  The control unit 1 acquires various information and data obtained from the personal identification unit 3, the personal state detection unit 5, the pattern storage unit 7, and the pattern change data storage unit 9. By selecting or generating a final oxygen supply pattern suitable for the above situation and controlling the oxygen supply unit 13, the high acidity concentration gas is supplied into the vehicle compartment according to the predetermined supply pattern. The control unit 1 functions as a pattern model selection unit that selects from the pattern storage unit 7 an oxygen supply pattern model for supplying a high oxygen concentration gas into the vehicle compartment based on the physiological state of the driver.

  2 and 3 show various pattern models stored in the pattern storage model unit 7. 2 (a) and 2 (b) show different examples of the intermittent pattern model, respectively, and FIG. 2 (c) shows an example of the Fourier function pattern model. The shape of the intermittent signal can be changed according to the driver's arousal level.

The intermittent pattern feature of FIG. 2A is easy to control and can change the external environment (output state) with simple control of power on / off. In the sensory organs of living organisms including human beings, “habituation” occurs when the irritated stimulus is in a certain condition, and the threshold value for recognizing changes in the external environment increases. Continuously outputting high concentration of oxygen for a certain period of time increases the metabolic efficiency and increases the activity of nerve cells, improving the arousal level. At the same time, it is external to the sensory organs of living organisms including humans. It is equipped with a mechanism that constantly recognizes changes in the environment (in this case, changes in output on / off) and monitors whether there are encounters with life support or danger (for example, an ascending reticular activation system) Including the nerve tract), and mobilizing all these mechanisms to effectively improve the arousal level. The output is turned on / off by repeating a pattern in which, for example, high-concentration oxygen is supplied for 20 seconds and the supply is stopped for 10 seconds. In the case of FIG. 2 (a), for example, a ₀ = 10 seconds and b ₀ = 20 seconds are set, and at other timings, a high concentration oxygen is supplied for 10 seconds and the supply is stopped for 10 seconds. May be repeated.

  In the case of the intermittent pattern in FIG. Furthermore, nerve cells are divided into functions such as cells that ignite on / off, cells that ignite to change, and cells that react to a combination of them. In the pattern of FIG. Awakening can be improved by firing many different neurons. Incidentally, “ignition” is an expression commonly used in neurophysiology, and the case where an output occurs in response to an input to a nerve cell is called ignition.

  The above-described effects are also included in the case of the intermittent pattern in FIG. Furthermore, in the case of this pattern, by measuring FmΘ in the electroencephalogram, the coefficient of the Fourier function pattern for calculating the degree of arousal that is most effective (assuming that FmΘ appears and can be maintained is effective) is calculated. It can be obtained by analysis. Here, FmΘ is an electroencephalogram that appears due to an intelligent attention maintenance function or a high arousal level function. This value may be set as a default value. The measurement method using this FmΘ as the evaluation standard of the arousal level is not limited to the pattern of FIG. 2C, but can be applied to the pattern of FIG. 2A and the pattern of FIG. The default value of the parameter can be obtained by measuring physiological information.

  On the other hand, FIG. 3 shows an example of a fluctuation pattern model. A power spectrum and 1 / f fluctuation are calculated by discrete Fourier transform of the input oxygen supply pattern at a simple constant interval, and oxygen is output in the applied state. It is thought that it can contribute to driver's arousal by giving fluctuations to the oxygen supply and adding strength to the supply.

  The various pattern models in FIGS. 2 and 3 are deformed and changed by the pattern change data according to the individual driver. Such pattern change data is stored in the pattern change data storage unit 9 as described above. A set of parameters such as coefficients, a0, a1, b0, b1, h, c, and ω in FIGS. 2 and 3 corresponds to the pattern change data. Such pattern change data is provided corresponding to each individual specified in advance. Further, there is no pattern change data for a person who has not been specified in advance (for example, a person who drives the vehicle for the first time). Therefore, a predetermined default value is prepared, and when such an unspecified one gets on, the default value may be used as it is to generate an oxygen supply pattern model.

  The default value setting is generally created offline as described above. Usually, that value is used. When creating a default value, a plurality of optimum default values are prepared in advance according to gender, age, driving history, personality pattern (for example, type A or other). The reason for classification according to type A or other is related to personality and behavior patterns, and people called type A behavior are hostile, competitive, tempered, frustrated, and work-immersive . There is data that it is easy to get distracted while driving a car, because it is a characteristic type that is obsessed with obsession-type behavior, waiting for something, or driving behind a slow car. Such personal information (gender, age, driving history, personality pattern) can be obtained from a license or the like (for example, an electronic license or an IC card), or can be set by an individual. For example, the personality as to whether it is type A may be determined from the accident history, the number of violations, etc., or the personality may be determined by receiving information such as the accident history from the communication unit. The default value that is closest to the individual may be selected and set directly based on information from a license, etc., or a value obtained by linearly interpolating parameter values using multiple default values and personal information may be used as an individual parameter. Good (reference: type A-personality and heart disease by M. Friedman, R.H. Rosenman / supervised by Toshinobu Kono / Haruka Niisato)

  FIG. 4 shows a process flow of the oxygen supply apparatus 100. First, the personal identification unit 3 identifies a driver based on information from the ID memory 15 or the like (step S1). Next, the vehicle state detection unit 11 determines the traveling state of the vehicle such as whether the vehicle is operating or stopped (step S2). If it is determined that the vehicle is in a stopped state, personal identification is performed again after a predetermined time (step S1), and it is further determined whether or not the vehicle is in operation (step S2). Until the state is reached, the operations of step S1 and step S2 are repeated. The predetermined time can be freely determined, and a default elapsed time stored in advance in the apparatus can be used.

  If it is determined in step S2 that the vehicle is in a driving state, the driver's physiological state is detected by the personal state detection unit 5 (step S3). Then, it is determined whether or not the pattern model change data corresponding to both the individual (driver) identification and the individual (driver) state exists in the pattern change data storage unit 9 (step S4). If it is determined that the pattern model change data exists, data corresponding to the driver is selected (step S5). If the data does not exist, a predetermined default value is selected (step S6).

  Then, a final oxygen supply pattern is generated based on the oxygen supply pattern model and the change data (step S7), and a high oxygen concentration gas is supplied into the vehicle compartment according to the pattern (step S8). For example, in the case of the intermittent pattern in FIG. 2A, in the case of the type A type, the high concentration oxygen is supplied for 20 seconds and the supply is stopped for 10 seconds. The pattern of supplying high concentration oxygen for 10 seconds and stopping the supply for 10 seconds may be repeated. Note that it is possible to change the blowing time (supply time) of this high concentration oxygen and the rest time (supply stop time).

  The present invention also provides an in-vehicle oxygen supply method, which includes a step of storing a plurality of oxygen supply pattern models corresponding to a driver's physiological state, a step of detecting a physiological state, and a detection A step of selecting an oxygen supply pattern model for supplying oxygen into the vehicle compartment from a plurality of oxygen supply pattern models based on the physiological state, and supplying oxygen into the vehicle compartment according to the selected oxygen supply pattern model Steps.

  The above-described method can further include the step of identifying the driver, and the step of changing the oxygen supply pattern model according to the identified driver, and detecting the traveling state of the vehicle; When the detected traveling state indicates that the vehicle is traveling, a step of supplying oxygen into the vehicle compartment can be further included.

  That is, the oxygen supply device can be realized without the personal identification unit 3 and the pattern change data storage unit 9. In this case, several standard oxygen supply pattern models may be prepared, and an appropriate oxygen supply pattern model may be selected based only on the detected physiological state of the driver. Moreover, the vehicle state detection part 11 is not essential.

  Moreover, the program for making the computer which comprises the vehicle-mounted oxygen supply apparatus perform each above-mentioned step is also contained in the scope of the present invention. This program can be incorporated in or outside the device in various formats. For example, the program can be recorded in a predetermined memory in the control unit 2. The program may be recorded on an information recording device such as a hard disk, or an information recording medium such as a CD-ROM, DVD-ROM, or memory card.

  When supplying oxygen according to the present invention, an appropriate oxygen supply pattern can be selected according to the physiological state of the driver, and the effect of supplying oxygen, particularly the driver's awakening effect, can be further enhanced.

  Although various embodiments of the present invention have been described above, the present invention is not limited to the matters shown in the above-described embodiments, and those skilled in the art will be able to understand based on the claims and the description of the specification and well-known techniques. Such changes and applications are also within the scope of the present invention, and are included in the scope of seeking protection.

  The present invention provides an in-vehicle oxygen supply device that can effectively awaken a driver and contribute to driving support.

Outline diagram of in-vehicle oxygen supply system Example of oxygen supply pattern model Example of oxygen supply pattern model Processing flow of on-board oxygen supply system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control part 3 Personal identification part 5 Personal state detection part 7 Pattern storage part 8 Pattern change data generation part 9 Pattern change data storage part 11 Vehicle state detection part 13 Oxygen supply part 15 ID memory 100 Oxygen supply apparatus

Claims (11)

A pattern storage unit that stores a plurality of oxygen supply pattern models according to the physiological state of the driver;
A personal state detection unit for detecting the physiological state;
A pattern model selection unit that selects, from the plurality of oxygen supply pattern models, an oxygen supply pattern model for supplying oxygen into the vehicle compartment based on the detected physiological state;
An in-vehicle oxygen supply device comprising: an oxygen supply unit that supplies oxygen into the vehicle compartment according to the selected oxygen supply pattern model. The in-vehicle oxygen supply device according to claim 1,
A personal identification unit for identifying the driver;
A pattern change data generator for generating pattern change data for changing the oxygen supply pattern model stored in the pattern storage unit according to the driver identified by the personal identification unit;
An in-vehicle oxygen supply device further comprising a pattern change data storage unit for storing the pattern change data. The in-vehicle oxygen supply device according to claim 2,
When the pattern change data storage unit does not have the pattern change data corresponding to the identified driver, the oxygen supply pattern model is generated based on a predetermined default value. apparatus. The in-vehicle oxygen supply device according to any one of claims 1 to 3,
A vehicle state detection unit for detecting a traveling state of the vehicle;
When the detected running state indicates that the vehicle is running, the oxygen supply unit supplies oxygen into the vehicle compartment. The in-vehicle oxygen supply device according to any one of claims 1 to 4,
The in-vehicle oxygen supply device, wherein the oxygen supply pattern model is an intermittent supply pattern model. The in-vehicle oxygen supply device according to any one of claims 1 to 4,
The in-vehicle oxygen supply device, wherein the oxygen supply pattern model is a Fourier function pattern model. The in-vehicle oxygen supply device according to any one of claims 1 to 4,
An in-vehicle oxygen supply device, wherein the oxygen supply pattern model is a fluctuation pattern model. Storing a plurality of oxygen supply pattern models according to the physiological state of the driver;
Detecting the physiological state;
Selecting, from the plurality of oxygen supply pattern models, an oxygen supply pattern model for supplying oxygen into the vehicle compartment based on the detected physiological state;
Supplying oxygen into the vehicle compartment according to the selected oxygen supply pattern model. The vehicle interior oxygen supply method according to claim 8,
Identifying the driver;
And a step of changing the oxygen supply pattern model according to the identified driver. The vehicle interior oxygen supply method according to claim 8 or 9,
Detecting the running state of the vehicle;
A vehicle interior oxygen supply method, further comprising: supplying oxygen into the vehicle interior when the detected travel state indicates that the vehicle is traveling.   The program for making a computer perform each step of Claim 8 thru | or 10.

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