JP2005185608A - Physical condition judging device - Google Patents

Abstract

An object of the present invention is to improve a determination accuracy in a physical condition determination device for an automobile driver.
A physiological information measuring device 20 measures a driver's blood pressure and heart rate. The inquiry execution unit 30 executes an inquiry regarding health to the driver. The data storage unit 40 has allowable range data that determines allowable ranges of blood pressure and heart rate. Tolerance range data is prepared in two ways: normal and sensitive. The physical condition acceptance / rejection determination unit 50 determines whether or not the driver's health condition requires attention based on the result of the inquiry performed by the inquiry execution unit 30, and based on the determination result, allows either normal time or attention required. The range data is read from the data storage unit 40, and using the blood pressure and heart rate obtained by the physiological information measuring device 20, it is determined whether or not the driver is in poor physical condition. The determination result of the physical condition is notified to the driver by the determination result notification unit 60.
[Selection] Figure 1

Description

  The present invention relates to an apparatus for determining the physical condition of a driver such as a vehicle.

  In recent years, for the purpose of preventing car accidents or improving safety, it is possible to monitor the health condition of the driver who is driving the car, and if the health condition is not suitable for driving, technology to inform the driver accordingly Has been developed.

  For example, Japanese Patent Laid-Open No. 6-22914 discloses a heart rate detection device using a heart rate sensor provided on a steering wheel.

JP-A-6-22914

  Conventionally, the physical condition of a driver who is driving a vehicle is determined based on whether or not the detected heart rate is within a predetermined allowable range. However, since the physical condition of the driver changes from day to day, there are times when it should be determined that there is no physical condition, and there are times when it should be determined that there is no problem with the physical condition, even if the heart rate is the same. However, in the conventional determination of the physical condition of the driver, the physical condition of the driver that changes daily is not taken into consideration. For this reason, poor physical condition is overlooked, or conversely, there is a case where it is determined that the physical condition is poor although there is no problem with the physical condition, and the accuracy of the physical condition determination cannot be said to be sufficient.

  An aspect of the present invention includes a physiological information measuring unit that measures a driver's physiological information, an inquiry execution unit that performs an inquiry to the driver, physiological information measured by the physiological information measuring unit, and the physiological information Physical condition quality determination means for determining the physical condition of the driver based on a physical condition determination standard that defines an allowable range, wherein the physical condition quality determination means uses the physical condition determination standard according to an inquiry result by the inquiry execution means. Judgment is performed. Examples of physiological information include blood pressure and heart rate.

  In the above aspect, the condition of the physical condition determination when the inquiry result by the inquiry execution unit is not good may be stricter than the condition determination standard when the inquiry result is good.

  In the above aspect, a plurality of the physiological information is measured, and the physical condition determination unit performs physical condition determination for each physiological information, and determines that the physical condition is poor when any one of the physiological information exceeds a physical condition determination criterion. May be.

  In the above aspect, a plurality of the physiological information is measured, and the physical condition quality determination unit performs physical condition determination for each physiological information, and determines that the physical condition is poor when two or more physiological information exceeds a physical condition determination criterion. May be.

  Moreover, in the said aspect, it further has a means to input profiles, such as age, sex, a weight, and height, The said physical condition quality determination means may perform a physical condition determination using the physical condition determination reference | standard according to the said profile. .

  Moreover, in the said aspect, the means which inputs the physiological information data which the driver | operator measured in the past may be further provided, and a physical condition determination reference | standard may be corrected according to the said physiological information data.

  According to the present invention, the physical condition of the driver can be determined with higher accuracy.

  Hereinafter, the present invention will be described through embodiments of the invention.

  FIG. 1 shows a configuration of a physical condition determination device 10 according to the embodiment.

  The physical condition determination device 10 includes a physiological information measurement device 20, an inquiry execution unit 30, a data storage unit 40, a physical condition quality determination unit 50, and a determination result notification unit 60.

  The physiological information measuring device 20 measures physiological information such as a driver's blood pressure and heart rate. The physiological information measuring apparatus 20 includes an electrocardiographic sensor 22 shown in FIG. 2, a wristwatch-type pulse wave sensor 24 shown in FIG. 4, and a physical condition acceptability determination unit 50 shown in FIG. 5, and measures physiological information such as blood pressure and heart rate. To do.

  As shown in FIG. 2, the electrocardiographic sensor 24 includes electrodes 30 and 32 provided on the steering wheel 28, a potential difference measuring unit 34, and an electrocardiogram calculating unit 36. The electrodes 30 and 32 are provided on the left and right sides of the steering wheel 28, and a potential difference is generated between the electrodes 30 and 32 when the left and right hands of the driver touch the electrodes 30 and 32 independently. A potential difference between the electrodes 30 and 32 is measured by a potential difference measuring unit 34. The electrocardiogram calculation unit 36 calculates an electrocardiogram based on the potential difference measured by the potential difference measurement unit 34. The calculated electrocardiogram is transmitted to the physical condition quality determination unit 50.

  The electrodes of the electrocardiographic sensor 22 are not limited to being installed on the steering wheel 28, and may be provided on the shift lever 38, the center console 40, the door trim 42, or the like as shown in FIG. According to this, an electrocardiogram can be measured even when the steering wheel 28 is not grasped with both hands. For example, the electrocardiogram can be measured even when the steering wheel 28 is gripped with the right hand and the shift lever 38 is operated with the left hand.

  FIG. 4 shows a wrist watch type pulse wave sensor 24. The wristwatch-type pulse wave sensor 24 includes a belt 44 that can be worn on the driver's arm and a pulse wave sensor 46 provided on the back surface of the belt 44. The pulse wave sensor 46 detects the reflected light of the infrared rays emitted from the LED by a photoelectric detector, and measures the change in blood flow. The pulse wave obtained by the wristwatch type pulse wave sensor 24 is transmitted to the physical condition quality determination unit 50 by a well-known wireless transmission means (not shown).

  FIG. 5 shows a configuration of the physical condition quality determination unit 50. The physical condition quality determination unit 50 includes an electrocardiogram peak detection unit 52, a pulse wave peak detection unit 54, a peak time difference detection unit 56, a peak interval detection unit 58, a blood pressure calculation unit 61, and a heart rate calculation unit 62. FIG. 6 shows an electrocardiogram 64 and a pulse wave 66 obtained by the electrocardiogram sensor 22 and the wristwatch-type pulse wave sensor 24, respectively, and a method for calculating blood pressure and heart rate by the physical condition quality determination unit 50 will be described with reference to FIG. To do.

  The electrocardiogram peak detection unit 52 detects each peak position of the electrocardiogram 64 (the portion marked with ◯ in the electrocardiogram 64), and records the time when each peak appears. Further, the pulse wave peak detection unit 54 detects each peak position of the pulse wave 66 (portion where the circle is added to the pulse wave 66), and records the time when each peak appears.

  The peak time difference detection unit 56 calculates a PWTT (pulse wave propagation time) 68 based on the time at which each electrocardiogram peak appears and the time at which each pulse wave peak generated after each electrocardiogram peak appears. The PWTT 68 is known to shorten when the blood pressure increases and to extend when the blood pressure decreases, and the blood pressure can be detected by obtaining the PWTT 68.

  The blood pressure calculation unit 61 calculates the blood pressure by a predetermined calculation formula using each PWTT 68 obtained by the peak time difference detection unit 56.

  The peak interval detector 58 calculates a time difference 70 between each pulse wave peak of the pulse wave 66. The heart rate calculator 62 calculates a heart rate by a predetermined calculation formula based on each time difference 70 obtained by the peak interval detector 58. Needless to say, the heart rate can also be obtained from the electrocardiogram 64.

  Returning to the description of the physical condition determination apparatus 10 shown in FIG. 1, the inquiry execution unit 30 performs an inquiry related to the physical condition of the driver. The inquiry execution unit 30 displays the question items on a vehicle-mounted display, and obtains an answer from the driver.

  FIG. 7 shows a display screen example 74 for inquiry displayed on the display 72. The display screen example 74 shows questions and answers to the questions, and the driver answers each question. The answer can be made using a known touch panel.

  The question may be made by voice, the driver's answer to the question may be made by voice, and the answer may be obtained using a known voice recognition system.

  The data storage unit 40 stores blood pressure and heart rate tolerance range data. For example, there are two types of blood pressure permissible range data, that is, a normal time and a time when attention is required, and each determines a lower limit value and an upper limit value of the blood pressure permissible range. The lower limit value at the time of attention is set higher than the normal time, and the upper limit value at the time of attention is set lower than the normal time. That is, the allowable range is set narrower than usual when attention is required.

  Note that the blood pressure and heart rate calculated by the physiological information measuring device 20 and the inquiry result by the inquiry execution unit 30 may be recorded in the data storage unit 40. According to this, the obtained physiological information and the inquiry result can be read as needed and utilized for diagnosis by a doctor and the like.

  The physical condition determination unit 50 determines whether or not the driver is in good physical condition based on the blood pressure and heart rate calculated by the physiological information measuring device 20 and the inquiry result by the inquiry execution unit 30. The operation procedure of the physical condition determination unit 50 will be described according to the flowchart shown in FIG. Below, the physical condition quality determination based on blood pressure is demonstrated.

  First, based on the result of the inquiry, it is determined whether or not the driver's physical condition requires attention (S10). For example, if points are set for the answers to each question in the interview (for example, 1 point if the answer is related to poor physical condition, 0 if not), and the total number of points exceeds a predetermined value It is determined that it needs attention.

  If the physical condition is not sensitive, normal blood pressure tolerance range data is read from the data storage unit 40 (S20). On the other hand, when it is determined that the physical condition is in need of caution, blood pressure tolerance range data at the time of caution is read from the data storage unit 40 (S30).

  Whether or not the blood pressure is within the allowable range is examined based on the allowable range data at the normal time or at the time of caution and the blood pressure obtained by the physiological information measuring device 20, and the quality of the physical condition is determined (S40). . If the blood pressure is within the allowable range, the physical condition is good, and if the blood pressure exceeds the allowable range, the physical condition is determined to be poor. In determining the poor physical condition, the number of times that the blood pressure exceeds the allowable range within a predetermined period reaches the predetermined number, or the continuous time or total time when the blood pressure exceeds the allowable range within the predetermined period is predetermined. It is good also as a condition when exceeding this time. According to this, malfunction when a sudden drop in blood pressure or increase that is not directly related to poor physical condition is prevented, and it is possible to make a more accurate physical condition determination.

  In the above, taking the blood pressure as an example, the operation of the physical condition determination unit 50 has been described. However, the physical condition determination based on the heart rate can be performed in parallel with the blood pressure, and either the blood pressure or the heart rate is determined. When the allowable range is exceeded or when both the blood pressure and the heart rate exceed the allowable range, it can be determined that the physical condition is poor.

  FIG. 9 illustrates physical condition determination based on blood pressure and heart rate. The graph of FIG. 9 represents the time change of the blood pressure data 80 and the heart rate data 82 obtained by the physiological information measuring device 20. Here, it is assumed that the physical condition is a caution, and the allowable ranges for blood pressure and heart rate are those for the caution. In FIG. 9, at time T <b> 1, the blood pressure does not exceed the normal blood pressure upper limit, but exceeds the blood pressure upper limit for caution, so it is determined that the patient is in poor physical condition. At time T1, the heart rate data 82 does not exceed the heart rate upper limit at the time of caution and the blood pressure data 80 only exceeds the allowable range, but the blood pressure data 80 and the heart rate data 82 are within the allowable range. When it exceeds (time T2), it may be determined that the patient is in poor physical condition.

  The determination result notification unit 60 receives the determination result from the physical condition determination unit 50 and causes the display 72 to display the determination result. The determination result alerting | reporting part 60 may alert | report a physical condition defect with a warning sound. If the driver continues to drive despite poor physical condition, or if the poor physical condition continues or worsens, a signal to automatically stop the vehicle is driven. It may be sent to the control device or notified to the rescue.

  According to the configuration of the physical condition determination device 10 described above, since the reference for determining whether or not the physical condition of the driver is necessary is set, the determination of whether or not the physical condition is good can be performed with higher accuracy. Malfunction is prevented.

  FIG. 10 shows a configuration of a physical condition determination device 12 according to another embodiment. The physical condition determination device 12 has the same configuration as the physical condition determination device 10 except that it includes a personal information input unit 14. Therefore, in the following, the description of the same configuration as the physical condition determination device 10 will be omitted as appropriate, and the description will focus on the configuration different from the physical condition determination device 10.

  The personal information input unit 14 inputs profile data such as age, sex, weight, and height, and physiological information data in a normal time when the driver himself / herself actually measured blood pressure, heart rate, etc. in a hospital or the like. The input data is sent to the physical condition determining unit 50. The driver can input his / her profile data or physiological information data using the touch panel of the display 72, for example.

  The data storage unit 40 stores permissible range data such as blood pressure and heart rate corresponding to profiles such as age, sex, weight, and height. Tolerance range data is prepared in two ways: normal and sensitive.

  The physical condition determination unit 50 reads allowable range data such as blood pressure and heart rate corresponding to the profile data input from the personal information input unit 14 from the data storage unit 40, and performs physical condition determination. According to this, since the reference for determining the physical condition is set according to the driver's profile, the physical condition determination can be performed with higher accuracy.

  Furthermore, when the physiological information data is input to the personal information input unit 14, the physical condition quality determination unit 50 corrects the allowable range data. For example, when the average blood pressure during normal times is input, the upper and lower limits of the allowable range data are corrected so that the average blood pressure is at the center of the allowable range. According to this, since the reference for determining the physical condition is set according to the history of the physiological information of the driver in the past, the physical condition determination can be performed with higher accuracy.

It is a figure showing the composition of physical condition judging device 10 concerning an embodiment. It is a figure which shows the electrocardiogram sensor. It is a figure which shows the example of attachment of the electrode of the electrocardiogram sensor. It is a figure which shows the wristwatch-type pulse wave sensor. It is a figure which shows the structure of the physical condition quality determination part. It is a figure which shows the electrocardiogram 64 and the pulse wave 66 which were obtained by the electrocardiogram sensor 22 and the wristwatch type pulse wave sensor 24, respectively. It is a figure which shows the display screen example 74 for an inquiry displayed on the display 72. FIG. It is a flowchart which shows the operation | movement procedure of the physical condition quality determination part. It is a figure which illustrates physical condition determination based on a blood pressure and a heart rate. It is a figure which shows the structure of the physical condition determination apparatus 12 which concerns on other embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Physical condition determination apparatus, 20 Physiological information measurement apparatus, 22 Electrocardiogram sensor, 24 Watch type pulse wave sensor, 30 Interrogation execution part, 40 Data storage part, 50 Physical condition determination part, 60 Determination result alert | report part, 72 Display.

Claims (6)

Physiological information measuring means for measuring the physiological information of the driver;
An interrogation execution means for interrogating the driver;
Physical condition quality determination means for determining the physical condition of the driver based on physiological information measured by the physiological information measurement means and physical condition determination criteria for determining an acceptable range of the physiological information;
With
The physical condition determination device, wherein the physical condition determination unit performs physical condition determination using a physical condition determination criterion corresponding to an inquiry result by the inquiry execution unit.   The physical condition determination apparatus according to claim 1, wherein conditions for physical condition determination when an inquiry result by the inquiry execution unit is not favorable are stricter than conditions for physical condition determination when the inquiry result is good.   A plurality of the physiological information is measured, and the physical condition quality determination unit performs physical condition determination for each physiological information, and determines that the physical condition is poor when any one of the physiological information exceeds a physical condition determination criterion. The physical condition determination apparatus according to claim 1 or 2.   A plurality of the physiological information is measured, and the physical condition quality determination unit performs physical condition determination for each physiological information, and determines that the physical condition is poor when two or more physiological information exceeds a physical condition determination criterion. The physical condition determination apparatus according to claim 1 or 2. It further includes means for entering profiles such as age, gender, weight, height,
The physical condition determination device according to claim 1, wherein the physical condition quality determination unit performs physical condition determination using a physical condition determination criterion corresponding to the profile. A means for inputting physiological information data measured in the past by the driver;
The physical condition determination apparatus according to any one of claims 1 to 5, wherein a physical condition determination criterion is corrected according to the physiological information data.

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