JPH10328154A - Mental and physical condition evaluation device - Google Patents

Abstract

(57) [Problem] To move a trajectory when evaluating a subject's mind and body state from a trajectory diagram drawn on a coordinate plane, with a heart rate calculated from a subject's electrocardiographic signal and a pulsation interval RRV on a coordinate plane. Even when there is a change in the direction, the mental and physical condition is accurately evaluated. A load presentation unit (1) sets a load, and outputs a time during which the amount of change in the load changes to an elapsed time determination unit (27). From the electrocardiogram signal detected by the sensor 2 and amplified and filtered by the electrocardiogram measurement unit 3, the electrocardiogram analysis unit 4 calculates the variance value RRV of the heart rate and the beat interval. In the trajectory diagram processing unit 5, a new coordinate plane is provided for each time when the amount of change in the load changes,
A trajectory diagram with the heart rate on the abscissa and the variance RRV on the ordinate is created and displayed on the trajectory display section 6. Psychosomatic condition evaluation unit 7
Then, the mental and physical condition is evaluated from the movement of the trajectory. Even when there is a change in the moving direction of the trajectory, since the trajectory diagram is drawn on another coordinate plane every time, the mental and physical state can be evaluated for each trajectory diagram.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a psychosomatic condition evaluation apparatus for evaluating a psychosomatic condition when a load is applied to a subject.

[0002]

2. Description of the Related Art Conventionally, a variance value RRV of a heart rate and a beat interval is calculated from an electrocardiographic signal of a subject, and a locus diagram is drawn on a coordinate plane in which the heart rate is set on a vertical axis and the variance value RRV is set on a horizontal axis. And
There is a psychosomatic state evaluation device that evaluates the psychosomatic state from the trajectory. FIG. 16 shows an example of this type of evaluation device. The load control unit 32 of the load presentation unit 11 sets a load on the bicycle ergometer 22, and the sensor 2 detects an electrocardiographic signal of the subject. The measured electrocardiographic signal is amplified by the amplifier 23 of the electrocardiograph 3, filtered by the filter 24, and sent to the electrocardiogram analyzer 4.

In the electrocardiogram analyzing section 4, the heart rate and the interval RRI of the R wave of the electrocardiographic signal which is the pulsation interval as shown in FIG.
Is calculated, and the variance RRV is calculated from the following equation.

(Equation 1) The trajectory diagram processing unit 13 creates coordinate data on a coordinate plane in which the heart rate is set on the vertical axis and the variance RRV is set on the horizontal axis. The locus diagram display section 6 displays a locus diagram based on the coordinate data. The psychosomatic state evaluation unit 7 evaluates the psychosomatic state from the change of the locus displayed on the locus diagram.

[0004] Even if the heart rate is constant, the beat interval varies slightly every beat, and when the user is relaxing,
It is known that the variability is large, and the variability decreases during concentration or tension. Therefore, the variance value RRV of the beat interval can be calculated from the electrocardiographic signal and used as an index of whether the subject is relaxed or nervous. However, since the pulsation interval changes depending on the increase and decrease of the heart rate, even if only the variance value RRV is calculated from the electrocardiographic signal, it is not sufficient for the evaluation of the mental and physical condition. Therefore, as shown in FIG.
And the variance value RRV (R1) of the pulse intervals of the n heartbeats within a predetermined time immediately before the time t2, and the heart rate (B2) and the n heartbeats within a predetermined time immediately before the time t2 The variance value RRV (R2) is obtained from the electrocardiographic signal, and as shown in FIG. 18B, the heart rate is displayed on the coordinate set on the vertical axis and the variance value RRV is displayed on the horizontal axis, and as time elapses, We draw as a trajectory, and evaluate the mental and physical condition from the trajectory map.

[0005]

However, in such a conventional mental and physical condition evaluation apparatus, when a subject is given an exercise load as shown in FIG. As shown in FIG. 19B, when the load increases from a low load to a high load and decreases to a low load after maintaining a constant value, the locus moves from the point a1 to the points a2 and a3. In such a locus diagram display method, the heart rate and the variance RRV measured within the measurement time are displayed in a single locus diagram. Therefore, after drawing the locus diagram, the moving direction of such a locus However, there is a problem that the reliability of the evaluation of the physical and mental state is reduced because the change with time of the locus cannot be recognized even by looking at the locus diagram having a change in the locus. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a psychosomatic state evaluation apparatus that can accurately evaluate a subject's psychosomatic state even in the case where there is a change in the moving direction of a trajectory.

[0006]

In order to achieve the above object, a psychosomatic condition evaluation apparatus according to the present invention comprises: a load presenting means for applying a load to a subject; an electrocardiographic measuring means for measuring an electrocardiographic signal of the subject; The electrocardiogram analyzing means for calculating the variance RRV of the heart rate and the R-wave interval of the electrocardiographic signal from the output of the electrocardiographic measuring means, and the coordinates of the trajectory chart having the heart rate on the horizontal axis and the variance RRV on the vertical axis. A trajectory map processing means for setting and creating coordinate data, a trajectory map display means for displaying a trajectory map, and a psychosomatic state evaluation means for evaluating a psychosomatic state from a trajectory change of the trajectory map are provided.

The trajectory diagram processing means may include an elapsed time determining means for determining an elapsed time and a coordinate setting means for changing a coordinate plane based on an output of the elapsed time determining means. It is preferable that the coordinate setting means changes a horizontal axis direction of a coordinate plane based on an output of the elapsed time determination means.

Further, the trajectory diagram processing means may include a load fluctuation amount determining means for determining a change in the load fluctuation amount, and a coordinate setting means for changing a coordinate plane based on the output of the load fluctuation amount determining means. It is also possible to determine the direction of the change in the load fluctuation amount and change the horizontal axis direction of the coordinate plane. The trajectory diagram processing means may include a heart rate fluctuation amount determining means for determining a change in the heart rate fluctuation amount, and a coordinate setting means for changing a coordinate plane based on the output of the heart rate fluctuation amount determining means. It is also possible to determine the direction of the change in the heart rate fluctuation amount and change the horizontal axis direction on the coordinate plane.

Further, the trajectory diagram processing means includes a variance value RRV
A variance value fluctuation amount determining means for determining a change in the fluctuation amount and a coordinate setting means for changing a coordinate plane based on the output of the variance value fluctuation amount determining means may be provided. The variance RR
It is also possible to determine the direction of the change in the V fluctuation amount and change the horizontal axis direction of the coordinate plane.

[0010]

When the load is set so that the heart rate increases or decreases over time by setting the heart rate on the horizontal axis and the variance value RRV on the vertical axis of the coordinate plane on which the locus diagram is drawn. In this case, the heart rate on the horizontal axis can be regarded as substantially coincident with the time axis, and the concept of the time axis often set on the horizontal axis can be included in the locus diagram. FIG.
The locus diagram when the load is set as shown in FIG.
FIG. 20B shows the coordinates displayed with the heart rate taken on the horizontal axis and the variance RRV taken on the vertical axis. In this case, as time elapses, the locus moves from point b1 to point b2 and point b3,
Since the passage of time is reflected on the horizontal axis, it is easy to recognize changes over time in the locus diagram. Can be improved in evaluation accuracy.

For this purpose, a new coordinate plane is provided for each time set by the load presenting means, and a separate trajectory diagram is obtained, whereby the mental and physical condition of each section can be evaluated.
It is possible to know the temporal change of the mental and physical state of the subject due to the temporal change of the load. Further, a new coordinate plane is provided based on the change in the load variation set by the load presenting means to obtain another trajectory map, or the heart rate variation and the variance RRV are obtained.
By providing a new section based on the change in the fluctuation amount and obtaining another trajectory diagram, the mental and physical condition of each section can be similarly evaluated. Further, when the heart rate decreases with the passage of time, the trajectory is displayed to move from left to right with the passage of time by inverting the magnitude relationship of the horizontal axis of the coordinate plane. Is displayed on the trajectory diagram in accordance with the general concept of the time axis that is displayed from left to right.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to examples. FIG. 1 is a diagram showing a first embodiment of the present invention. The psychosomatic condition evaluation apparatus according to the present embodiment includes a load presenting unit 1 for applying a load to a subject, a sensor 2 for detecting an electrocardiographic signal of the subject, an electrocardiographic measuring unit 3 for extracting a necessary signal from the electrocardiographic signal, An electrocardiogram analyzing unit 4 for calculating a heart rate and a variance value RRV from an output of the electrocardiogram measuring unit 3, a locus diagram processing unit 5 for creating data for displaying a locus diagram, and a locus diagram display unit for displaying a locus diagram. 6 and a psychosomatic state evaluation unit 7 for evaluating the psychosomatic state of the subject from the movement of the trajectory.

The load presenting section 1 includes a load control section 21 and a bicycle ergometer 2 controlled by the load control section 21.
2 The load control unit 21 outputs to the locus diagram processing unit 5 the time for switching the amount of change in the applied load. The electrocardiogram measurement unit 3 includes an amplification unit 23 and a filter 24. The locus diagram processing unit 5 includes a coordinate setting unit 25, a coordinate data creation unit 26, and an elapsed time determination unit 27.

Next, the basic operation of this embodiment will be described with reference to the flowchart shown in FIG. In step 101, the operation is started and the operation proceeds to step 102. Step 1
When the load control unit 21 of the load presentation unit 1 sets the load and time to be applied to the subject as shown in FIG. 3A, the load control unit 21 sets the bicycle ergometer 2
2 and set time T0, T1, T2, T3,
It outputs T4 and T5 to the elapsed time determination unit 27. In step 103, the coordinate setting unit 25 of the trajectory diagram processing unit 5 sets the first coordinate plane for drawing the trajectory. Step 104
Then, the subject's electrocardiographic signal detected by the sensor 2 is
The signal is amplified by the amplification unit 23 of the electrocardiogram measurement unit 3, and an unnecessary signal is removed by the filter 24. In step 105, the electrocardiogram analyzing unit 4 calculates the variance value RRV of the heart rate B and the beat interval from the electrocardiographic signal read from the electrocardiographic measuring unit 3. The operation of this step will be described later in detail using another flowchart.

In step 106, the coordinate data generator 26 of the locus map processor 5 calculates the coordinate positions of the heart rate B and the variance RRV at the coordinates set by the coordinate setting unit 25, and displays the coordinate data for display. Create In step 107, the locus diagram display unit 6 draws a locus diagram of the coordinate data created by the coordinate data creating unit 26 on the coordinate plane set by the coordinate setting unit 25. In step 108, the elapsed time T from the start of the electrocardiographic signal measurement is compared with the times T1, T2, T3, T4 and T5 set by the elapsed time determination unit 27, and the time T
Is equal to the time T1, T2, T3, T4 or T5, the routine proceeds to step 109. When the time T does not coincide with the time T1, T2, T3, T4 or T5, the process returns to step 104, and the measurement of the electrocardiographic signal is continued.

In step 109, the psychosomatic state evaluation section 7 evaluates the psychosomatic state of the subject from the change in the locus position of the locus diagram drawn on the coordinate plane. When the trajectory is distributed above the coordinate plane, the variance RRV is large,
That is, since the variation in the time interval RRI of the R wave of the electrocardiographic signal is large, it is determined that the subject's mental and physical state is the relaxed state. When the trajectory is distributed on the lower side of the coordinate plane, the variance RRV is small, that is, the variation of the time interval RRI of the R wave of the electrocardiographic signal is small. I do. For example, as shown in FIG. 3B, between time T0 and time T1, the trajectory is distributed to the upper left, so the subject's mental and physical state is determined to be in a relaxed state, and the time from time T1 to time T1 is determined. During T2, since the trajectory moves from the upper left to the lower right, it is determined that the trajectory has moved from the relaxed state to the concentrated state. Similarly, during the period from time T2 to T3, the person is in the concentrated state, and between the time T3 and time T4, the person moves from the concentrated state to the relaxed state,
From time T4 to time T5, it is evaluated as being in a relaxed state.

In step 110, the elapsed time T from the start of the electrocardiographic signal measurement is determined by the time set by the elapsed time determination unit 27.
Compared to T1, T2, T3, T4 and T5, time T is equal to time T1, T
When it matches 2, T3 or T4, the process proceeds to step 111. When the time T coincides with the time T5, step 11
Proceed to 2 and end the operation. In step 111, the coordinate setting unit 25 newly sets a coordinate plane in order to draw a new trajectory diagram.

Next, the operation of the electrocardiogram analyzer 4 in step 105 will be described with reference to the flowchart shown in FIG. In step 113, the electrocardiogram signal V (t) output from the electrocardiogram measurement unit 3 is fetched. In step 114, the electrocardiographic signal V (t) is compared with a preset threshold value Th. If the electrocardiographic signal V (t) is smaller than the threshold value Th, the process returns to step 114. If the electrocardiographic signal V (t) is larger than the threshold value Th, it is determined that the R wave has been measured, and the process proceeds to step 115. In step 115, the electrocardiographic signal V (t)
Is measured as time R (i). Step 11
At 6, the difference between the time R (i) and the time R (i-1) when the previous electrocardiographic signal V (t) exceeded the threshold value Th is defined as an R-wave interval RRI (i).

In step 117, the instantaneous heart rate B '
(I) is calculated from the following equation. B ′ (i) = 60 / RRI (i) In step 118, a moving average value RRI (i) a of the n interval RRIs is calculated from the following equation.

(Equation 2) In step 119, a heart rate B (i) which is a moving average value of the n instantaneous heart rates B 'is calculated from the following equation.

(Equation 3) In step 120, n moving average values RRI are obtained from the following equation.
(I) Calculate the variance RRV (i) of a.

(Equation 4) Thereby, the heart rate and the variance RRV are obtained.

Step 10 of the flowchart shown in FIG.
Step 2 constitutes a load presenting means in the invention, and step 104 constitutes an electrocardiogram measuring means. Step 105 of the flowchart shown in FIG. 2, that is, steps 113 to 120 of the flowchart shown in FIG. Steps 103, 106, 108, 11
0 and step 111 constitute a trajectory diagram processing means in the invention, and particularly, step 103 and step 11
1 is a coordinate setting means, which corresponds to steps 108 and 110
Constitutes elapsed time determination means. Step 107
Step 109 constitutes a trajectory diagram display means in the invention, and Step 109 constitutes a psychosomatic state evaluation means.

By the above operation, as shown in FIG. 3B, a constant high level is maintained between the time T0 and the time T1 before the load is applied and between the time T1 and the time T2 when the load gradually increases. Separate trajectory diagrams for each section from time T2 when the load is applied to time T3, from time T3 when the load is gradually reduced to time T4, and from time T4 to time T5 when the load is not applied Can be obtained, and the psychosomatic state of each section can be evaluated, and the temporal change of the psychosomatic state accompanying the temporal change of the load can be known. Also, between the time T1 when the load gradually increases and the time T2, the heart rate B also gradually increases,
Between the time T3 and the time T4 when the load gradually decreases, the heart rate B also gradually decreases, so that the heart rate axis, which is the horizontal axis of the coordinate plane, can be regarded as substantially coincident with the time axis, The time change of the variance RRV can be observed without providing a time axis.

The present embodiment is configured as described above, and a new coordinate plane is provided for each time set by the load presenting unit 1, and a trajectory diagram with the heart rate on the horizontal axis and the variance RRV on the vertical axis is shown. It is created separately, displayed on the trajectory diagram display unit 6, and evaluated by the psychosomatic state evaluation unit 7 for each section. The condition can be evaluated.

Next, a description will be given of a second embodiment of the present invention in which the configuration of the trajectory diagram processing unit is changed. FIG. 5 is a diagram illustrating the configuration of the trajectory diagram processing unit 8 according to the present embodiment. This locus diagram processing unit 8
Is composed of a coordinate setting unit 28, a coordinate data creation unit 26, and an elapsed time determination unit 29. This operation is different from step 12 in FIG. 6 in place of steps 110 and 111 in the flowchart for explaining the operation of the first embodiment shown in FIG.
1. Steps 122 and 123 are executed.

After the mental and physical condition is evaluated in step 109, the process proceeds to step 121 instead of step 110.
In step 121, the elapsed time T from the start of the electrocardiographic signal measurement is determined by the time T1, T2, T3,
When the time T matches the time T1 or T2 as compared with T4 and T5, the process proceeds to step 122. Time T is T3 or T4
If it matches, the process proceeds to step 123. When the time T coincides with the time T5, the process proceeds to step 112, and the operation ends. In step 122, a coordinate plane is newly set to draw a new trajectory map, and in step 104
Return to

In step 123, in order to draw a new trajectory diagram, the magnitude of the heart rate axis, which is the horizontal axis, is inverted, and a coordinate plane for displaying a trajectory with a small heart rate on the right side and a large heart rate on the left side is set. A new setting is made and the process returns to step 104.
Step 108 of the flowchart of FIG. 2 and step 121 of the flowchart of FIG. 6 constitute an elapsed time determination unit of the invention, and step 103 of the flowchart of FIG. 2 and steps 122 and 123 of the flowchart of FIG. 6 constitute a coordinate setting unit. Other configurations and operations are the same as those of the first embodiment shown in FIG.

Thus, the locus diagram displayed as shown in FIG. 7A in the first embodiment is displayed as shown in FIG. 7B in the present embodiment. Since the heart rate axis substantially coincides with the time axis, it is represented in the directions of arrows c and d in FIG. In FIG. 7B, arrows c,
e is displayed in the direction of e, and the trajectory is displayed so as to move from left to right with the passage of time. I do. This embodiment is configured as described above,
The same effect as that of the embodiment can be obtained, and when the trajectory diagram is observed, the temporal change of the mental and physical state of the subject can be intuitively recognized.

Next, a description will be given of a third embodiment in which the load presenting section and the trajectory map processing section are changed. In the present embodiment, a coordinate plane is newly set based on a change in the amount of load fluctuation. FIG. 8 is a diagram showing the configuration of this embodiment. The load presentation unit 9 includes a load control unit 30 and a bicycle ergometer 22 controlled by the load control unit 30. The load control unit 30 outputs the value of the applied load to the locus diagram processing unit 10. The trajectory diagram processing unit 10 includes a coordinate setting unit 25, a coordinate data creation unit 26, and a load variation determination unit 31.

In the operation of the present embodiment, step 124 shown in FIG. 10 is used instead of step 102 in the flowchart for explaining the operation of the first embodiment shown in FIG. 2, and steps 125 and 126 are used instead of step 108.
Is executed. The operation starts in step 101. In step 124, when the load applied to the subject is set by the load control unit 30 as shown in FIG. 9A, the load control unit 30 operates the bicycle ergometer 22,
Further, it outputs the set value L of the load to the load variation determining unit 31.

After displaying the locus diagram in step 107,
Proceed to step 125 instead of step 108. In step 125, the load fluctuation amount determination unit 31 calculates the load fluctuation amount d from the load value L output from the load control unit 30.
L (= L (t) -L (t-1)) is obtained, and the variance ΔL of the load variation is calculated. In step 126, the variance value ΔL of the load variation is compared with a preset value Ls. When the variance value ΔL is smaller than the value Ls, the process returns to step 104. When the variance value ΔL is equal to or larger than the value Ls, the process proceeds to step 109, where the mental and physical states are evaluated, a new coordinate plane is set in step 111, and the process returns to step.

Further, in this embodiment, step 110 is omitted, and when the tester instructs the termination, the state of mind and body is evaluated and the operation is terminated. By these steps, a locus diagram and an evaluation result of the physical and mental state as shown in FIG. 9B are obtained. Step 124 corresponds to the load presenting means in the present invention, and includes steps 125 and 12
6 constitutes a load fluctuation amount determining means. Other configurations and operations are the same as those of the first embodiment.

The present embodiment is configured as described above. By providing a new coordinate plane based on the variance of the load variation, the same effect as that of the first embodiment can be obtained, and the time variation of the load can be obtained in advance. It is not necessary to set, and when the load fluctuates, new coordinates are set.
An appropriate load can be set in real time while observing the test state. If the load fluctuation amount dL becomes negative, the heart rate decreases. Therefore, as shown in FIG. 11, steps 127, 128, and 129 are provided instead of step 111, and the heart rate, which is the horizontal axis of the coordinates, is set. By reversing several axes, it is possible to intuitively recognize a temporal change in the physical and mental state of the subject when observing the locus diagram.

Next, a fourth embodiment in which the load presenting section and the trajectory map processing section are changed will be described. In the present embodiment, a coordinate plane is newly set based on a change in the heart rate fluctuation amount. FIG. 12 is a diagram showing the configuration of this embodiment. The load presentation unit 11 includes a load control unit 32 and a bicycle ergometer 22 controlled by the load control unit 32. The trajectory diagram processing unit 12 includes a coordinate setting unit 25, a coordinate data creation unit 26, and a heart rate fluctuation amount determination unit 33. The output of the electrocardiogram analysis unit 4 is sent to the coordinate data creation unit 26 and the heart rate fluctuation amount determination unit 33.

In the operation of this embodiment, step 130 shown in FIG. 14 is replaced by step 10 instead of step 102 of the flowchart for explaining the operation of the first embodiment shown in FIG.
Steps 131 and 132 are performed instead of 8. The operation starts in step 101. Step 13
0, the load applied to the subject by the load control unit 32 is as shown in FIG.
When the setting is made as shown in FIG. 3A, the load control unit 32 operates the bicycle ergometer 22. After displaying the locus diagram in step 107, the process proceeds to step 131 instead of step 108.

In step 131, the heart rate variability determining section 33 determines the heart rate variability dB (= B) from the heart rate B output from the electrocardiogram analyzing section 4 shown in FIG.
(T) −B (t−1)), and the variance ΔB of the heart rate fluctuation amount is calculated. In step 132, the variance ΔB of the heart rate variability is compared with a preset value Bs, and the variance ΔB
Is smaller than the value Bs, the process returns to step 104,
When the variance value ΔB is equal to or greater than the value Bs, the process proceeds to step 109, where the mental and physical states are evaluated, a new coordinate plane is set in step 111, and the process returns to step 104.

In the present embodiment, step 110 is omitted, and when the termination is instructed by the tester, the state of mind and body is evaluated, and the operation is terminated. By these steps, a trajectory diagram and a mental and physical condition evaluation result as shown in FIG. 13C are obtained. Step 130 constitutes a load presenting means in the invention, and steps 131 and 132 constitute a heart rate fluctuation amount determining means. Other configurations and operations are the same as those of the first embodiment.

The present embodiment is configured as described above, and FIG.
(B), between the time T0 ′ and the time T1 ′ where the heart rate is almost constant at a low value, and between the time T1 ′ and the time T2 ′ where the heart rate gradually increases, During a period from time T2 ', at which the heart rate is almost constant at a high value to time T3', from a time T3 ', at which the heart rate gradually decreases to time T4',
And again, in each section from time T4 'to time T5' where the heart rate is almost constant at a low value, it is possible to obtain separate trajectory maps, and from these trajectory maps it is possible to evaluate the psychosomatic state of each section In addition, it is possible to know the temporal change of the physical and mental state due to the change of the heart rate. Further, as in the period from the time T2 'to the time T3', even if there is a change in the load fluctuation amount, a locus diagram when the heart rate fluctuation is small can be automatically cut out.

Therefore, by providing a new coordinate plane based on the variance value of the heart rate fluctuation amount, the same effect as in the first embodiment can be obtained, and the heart rate fluctuation is small and the subject's mental and physical state appears remarkably. The locus diagram of the section can be automatically cut out, and the evaluation accuracy of the mental and physical condition can be further improved.

Note that, as shown in FIG.
Are provided in place of step 133, step 134, and step 135. When the heart rate fluctuation amount dB becomes negative, the heart rate axis, which is the horizontal axis of the coordinates, is inverted to observe the trajectory diagram. It is possible to intuitively recognize a temporal change in the mental and physical state of the subject. Furthermore, in the present embodiment, the new coordinates are provided based on the change in the heart rate fluctuation amount, but the present invention is not limited to this, and new coordinates can be provided when the movement of the locus diagram changes. The coordinates may be newly provided based on the change in the variation of the variance RRV.

[0039]

As described above, according to the present invention, the heart rate is set on the horizontal axis and the variance value RRV is set on the vertical axis of the coordinate plane for drawing the trajectory diagram. By obtaining different trajectory maps in the sections, the evaluation of the mental and physical state of each section becomes possible, and it is possible to know the temporal change of the physical and mental state of the subject due to the temporal change of the load. Even when there is a change in the moving direction of the trajectory, a separate trajectory diagram can be obtained for each set time, and the psychosomatic state of the subject can be evaluated with high accuracy.

When the load is set so that the heart rate increases or decreases with the passage of time, the heart rate on the horizontal axis can be regarded as substantially coincident with the time axis. The concept of the time axis, which is usually set on the horizontal axis, can be included in the locus diagram, and the time change of the variance value RRV can be observed without providing the time axis.

Furthermore, when the heart rate decreases with the passage of time, the locus of the horizontal axis of the coordinate plane is inverted so that the trajectory is displayed so as to move from left to right with the passage of time. The concept of the normal time axis, in which the elapsed time is represented from left to right, matches the display on the trajectory diagram. Thereby, when observing the trajectory diagram, it is possible to intuitively recognize the temporal change of the mental and physical state of the subject.

Further, the locus diagram is divided into sections based on the change in the amount of load fluctuation set by the load presenting means, and another locus diagram is obtained. Since the new coordinates are set when the load changes, the tester can set an appropriate load in real time while observing the test state. In addition, the section is divided based on the change in the heart rate fluctuation amount and the variance RRV fluctuation amount, and another trajectory diagram is obtained, so that the trajectory diagram in which the heart rate fluctuation is small and the subject's mental and physical condition is conspicuous is automatically cut out. Therefore, the evaluation accuracy of the mental and physical condition can be further improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a flowchart of a basic operation of the first embodiment.

FIG. 3 is a diagram showing a load setting and a trajectory diagram of the first embodiment and a result of evaluation of a mental and physical condition.

FIG. 4 is a flowchart of an operation of the electrocardiogram analyzing unit.

FIG. 5 is a partial configuration diagram of a second embodiment.

FIG. 6 is a part of a flowchart of a basic operation of the second embodiment.

FIG. 7 is a diagram showing a load setting and a trajectory diagram of a second embodiment, and a result of mental and physical condition evaluation.

FIG. 8 is a configuration diagram of a third embodiment.

FIG. 9 is a diagram showing a load setting and a locus diagram of a third embodiment and a result of evaluation of a physical and mental state.

FIG. 10 is a flowchart of a basic operation of the third embodiment.

FIG. 11 is a flowchart showing a modification of the basic operation of the third embodiment.

FIG. 12 is a configuration diagram of a fourth embodiment.

FIG. 13 is a diagram showing a load setting and a trajectory diagram of a fourth embodiment, and a result of mental and physical condition evaluation.

FIG. 14 is a flowchart of a basic operation of the fourth embodiment.

FIG. 15 is a flowchart illustrating a modification of the basic operation of the fourth embodiment.

FIG. 16 is a configuration diagram of a conventional example.

FIG. 17 is an explanatory diagram of a variance value between an electrocardiographic signal and a beat interval.

FIG. 18 is a diagram illustrating a method of creating a locus diagram of a heart rate and a variance value.

FIG. 19 is a diagram showing a load setting and a locus diagram of a conventional example.

FIG. 20 is a diagram showing a load setting and a locus diagram.

[Explanation of symbols]

 1, 9, 11 load presenting unit 2 sensor 3 electrocardiographic measuring unit 4 electrocardiographic analyzing unit 5, 8, 10, 12, 13 trajectory map processing unit 6 trajectory diagram display unit 7 psychosomatic state evaluation unit 21, 30, 32 load control Unit 22 bicycle ergometer 23 amplification unit 24 filter 25, 28 coordinate setting unit 26 coordinate data creation unit 27, 29 elapsed time determination unit 31 load variation determination unit 33 heart rate variation determination unit

Claims (9)

[Claims] 1. A load presenting means for applying a load to a subject, an electrocardiogram measuring means for measuring an electrocardiographic signal of the subject, and a variance RRV of a heart rate and an R-wave interval of the electrocardiographic signal from an output of the electrocardiographic measuring means. And the coordinates of a locus diagram with the heart rate on the horizontal axis and the variance RRV on the vertical axis,
And a trajectory diagram processing means for creating coordinate data, a trajectory diagram display means for displaying the trajectory diagram, and a psychosomatic state evaluation means for evaluating a psychosomatic state from a trajectory change of the trajectory diagram. Evaluation device. 2. The method according to claim 1, wherein the trajectory diagram processing means includes an elapsed time determining means for determining an elapsed time and a coordinate setting means for changing a coordinate plane based on an output of the elapsed time determining means. The mental and physical condition evaluation device described in the above. 3. The mental and physical condition evaluation apparatus according to claim 2, wherein the trajectory diagram processing means changes a horizontal axis direction of a coordinate plane based on an output of the elapsed time determination means. 4. The method according to claim 1, wherein the trajectory diagram processing means includes a load fluctuation amount determining means for determining a change in the load fluctuation amount, and a coordinate setting means for changing a coordinate plane based on an output of the load fluctuation amount determining means. The mental and physical condition evaluation device according to claim 1, wherein: 5. The mental and physical condition evaluation device according to claim 4, wherein the trajectory diagram processing means changes a horizontal axis direction of a coordinate plane based on a direction of the change in the load fluctuation amount. 6. The trajectory diagram processing means includes a heart rate fluctuation amount determining means for determining a change in heart rate fluctuation amount, and a coordinate setting means for changing a coordinate plane based on an output of the heart rate fluctuation amount determining means. The psychosomatic condition evaluation device according to claim 1, further comprising: 7. The psychosomatic state evaluation apparatus according to claim 6, wherein the trajectory diagram processing means changes a horizontal axis direction of a coordinate plane based on a direction of the change in the heart rate variability. 8. The trajectory map processing means includes: a variance value variation amount determination means for determining a change in a variance value RRV variation amount; and a coordinate setting means for changing a coordinate plane based on an output of the variance value variation amount determination means. The mental and physical condition evaluation device according to claim 1, comprising: 9. The trajectory map processing means includes a variance value RR.
9. The mental and physical condition evaluation device according to claim 8, wherein the horizontal axis direction of the coordinate plane is changed based on the direction of the change in the V fluctuation amount.