WO2017163285A1

WO2017163285A1 - Biological information measurement device

Info

Publication number: WO2017163285A1
Application number: PCT/JP2016/004187
Authority: WO
Inventors: 和宏井出; 朋哉日下部; 北堂　正晴
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2016-03-25
Filing date: 2016-09-14
Publication date: 2017-09-28
Also published as: JP2017169974A

Abstract

A biological information measurement device according to the present invention includes: a first measurement unit that measures stress on the basis of the subjective opinion of a person to be measured; a second measurement unit that measures stress on the basis of biological information of the person to be measured; and a third measurement unit that measures stress on the basis of the measurement result from the first measurement unit and the measurement result from the second measurement unit. Thus, the stress state of the person being measured can be accurately measured. That is, the stress state of the person being measured can be accurately measured compared to when the stress state is measured only on the basis of the subjective opinion of the person being measured.

Description

Biological information measuring device

The present disclosure relates to a biological information measuring apparatus that measures a stress of a measurement subject.

In recent years, worker stress has attracted attention as a social problem. Against this background, a stress check system has been introduced that requires employers who meet certain conditions to check the stress of workers. In the stress determination method defined by the stress check system as described in Non-Patent Document 1, the subject's subjectivity is answered for a plurality of test items, and the measurer determines the subject's stress based on the result. judge. When it is determined that the stress is high, a treatment such as an interview by a doctor or a public health nurse is taken.

According to the stress determination method described above, since the stress state is determined based only on answers obtained by the subject's subjectivity, there is a possibility that an accurate result cannot be obtained.

An object of the present disclosure is to provide a biological information measuring device that contributes to accurately measuring the stress state of the measurement subject.

One form of the biological information measurement device according to the present disclosure includes a first measurement unit that measures stress based on subjectivity of the measurement subject, and a second measurement unit that measures stress based on biological information of the measurement subject. And a third measurement unit that measures stress based on the measurement result of the first measurement unit and the measurement result of the second measurement unit.

The biological information measuring device contributes to accurately measuring the stress state of the person being measured.

FIG. 1 is a front view of the biological information measuring apparatus according to the first embodiment. FIG. 2 is a front view of the biological information measuring apparatus of FIG. 1 attached to an arm. FIG. 3 is a rear view of the biological information measuring apparatus of FIG. FIG. 4 is a block diagram showing a configuration of the stress measurement unit of FIG. FIG. 5 is a diagram illustrating an example of a stress state measurement map. FIG. 6 is a flowchart illustrating an example of a procedure of a stress state measurement method. FIG. 7 is a diagram illustrating an example of a stress state measurement map according to the second embodiment.

(An example of a form that the biological information measuring device can take)
One form of the biological information measurement device according to the present disclosure includes a first measurement unit that measures stress based on subjectivity of the measurement subject, and a second measurement unit that measures stress based on biological information of the measurement subject. And a third measurement unit that measures stress based on the measurement result of the first measurement unit and the measurement result of the second measurement unit.

The measurement result obtained by the third measurement unit reflects not only the measurement result based on the subjectivity of the measurement subject obtained by the first measurement unit but also the objective measurement result regarding the stress obtained by the second measurement unit. To do. For this reason, compared with the case where the state of stress is measured based only on the subject's subjectivity, the state of stress of the subject can be measured accurately.

According to an example of the biological information measuring apparatus, the third measurement unit may be any of a plurality of types of stress states in which a combination of the measurement result of the first measurement unit and the measurement result of the second measurement unit is defined in advance. It is judged whether it corresponds to.

For example, if the subjectively measured stress intensity is significantly different from the objectively measured stress intensity, it is not possible to accurately measure the stress state only from the perspective of how much the stress intensity is. . One of the stress measurement methods in such a case is a combination of subjectively measured stress intensity and objectively measured stress intensity among a plurality of pre-classified stress states. A method for determining which of these is applicable. According to this method, when the measurement results by the subjective and objective methods are consistent and when the measurement results are not consistent, it can be determined as one of the stress states. The state can be measured more accurately.

According to the example of the biological information measuring device, the third measurement unit has a low stress estimated from the measurement result of the first measurement unit, and the stress estimated from the measurement result of the second measurement unit. If the strength of is high, it is determined that there is a stress that the measurement subject cannot recognize.

When the stress is measured using the biological information measuring apparatus including the first measurement unit and the second measurement unit, the stress intensity measured subjectively is weak and the stress intensity measured objectively. Measurement result may be obtained. This measurement result can also be interpreted as suggesting that there is a strong stress that the measurement subject cannot recognize. Since the biological information measuring device performs measurement incorporating such a concept, it can detect that there is a latent stress on the measurement subject.

According to an example of the biological information measurement device, the third measurement unit is based on the multiple measurement results acquired from the first measurement unit and the multiple measurement results acquired from the second measurement unit. Measure stress.

Measured person's condition and measurement environment may affect the measurement result related to stress condition. For this reason, in order to improve the accuracy of the measurement result, it is preferable to obtain a final measurement result by combining a plurality of measurement results. According to the biological information measuring apparatus, since measurement based on such points is performed, the state of stress of the measurement subject can be measured more accurately.

According to an example of the biological information measuring device, at least one of the measurement result of the first measurement unit, the measurement result of the second measurement unit, and the measurement result of the third measurement unit is used as the characteristics of the measurement subject. Correct based on.

Measured person characteristics may affect the response to stress. A major example of a person being measured is the age and personality of the person being measured. According to the biological information measuring apparatus, since measurement based on such points is performed, the state of stress of the measurement subject can be measured more accurately.

(Embodiment 1)
The configuration of the biological information measuring apparatus 10 will be described with reference to FIGS.

1, the biological information measuring device 10 includes a main body 11, an input unit 12, an output unit 13, a mounting unit 14, a pulse wave detection unit 20, and a stress measurement unit 30. The stress measurement unit 30 is a computer having a function of measuring a state related to stress of the measurement subject (hereinafter, “stress state”). The main body 11 supports or accommodates various elements constituting the biological information measuring apparatus 10 including the input unit 12 and the like.

The input unit 12 is operated by a measurement person or a measurement person (hereinafter referred to as “user”) in order to input information on the measurement person to the stress measurement part 30. An example of the input unit 12 is an operation button provided on the main body 11 so that the user can operate, or a wireless reception unit provided on the main body 11 so that information from an external device can be received. An example of the external device is a portable information terminal such as a smartphone, a tablet information terminal, and a portable or stationary personal computer.

The information about the person to be measured input to the input unit 12 is considered to affect information that subjectively evaluates the state of the person to be measured regarding stress (hereinafter referred to as “subjective evaluation information”) and a response to the stress. Information on the characteristics of the person being measured (hereinafter referred to as “characteristic information”). Subjective evaluation information includes, for example, the response of the measured person to the Occupational Stress Simple Questionnaire, the response of the measured person to the Chalder Fatigue Scale, the response of the measured person to the Pittsburgh Sleep Questionnaire, or depression The measurement result of the measured person for CES-D is measured. The characteristic information includes, for example, age and personality.

The output unit 13 outputs the stress state measured by the stress measurement unit 30. An example of the output unit 13 is a display device provided in the main body 11 so that the user can visually recognize it, or a wireless transmission unit provided in the main body 11 so that information can be transmitted to the portable information terminal.

The mounting part 14 fixes the main body 11 to the arm of the person to be measured. An example of the mounting portion 14 is a belt. FIG. 2 shows a state in which the main body 11 is attached to the arm of the person to be measured when the attachment portion 14 is wound around the arm. In addition, the structure for mounting | wearing the body with the biological information measuring device 10 can be changed arbitrarily. For example, the biological information measuring device 10 can be configured to be worn on the finger, ankle, forehead, chest, shoulder, or ear of the measurement subject.

As shown in FIG. 3, the pulse wave detection unit 20 includes a light emitting unit 21 and a light receiving unit 22, and is a pulse that is time-series data of a measured subject's pulse wave based on a light reception signal output from the light receiving unit 22. Wave information is calculated. The light emitting unit 21 and the light receiving unit 22 are provided on the back surface 11 </ b> B of the main body 11. An example of the light emitting unit 21 is a green light emitting diode. An example of the light receiving unit 22 is a photodiode. When green light is reflected from the light emitting unit 21 toward the body, a part of the green light is reflected and received by the light receiving unit 22. The light receiving unit 22 outputs a light reception signal that changes according to the intensity of the received green light. The intensity of the reflected green light varies depending on the state of the pulse wave of the measurement subject. For this reason, the pulse wave of the person to be measured can be calculated based on the light reception signal of the light receiving unit 22.

The configuration of the stress measurement unit 30 will be described with reference to FIG.

The stress measurement unit 30 includes a first measurement unit 31, a second measurement unit 32, a third measurement unit 33, a CPU 34, and a memory 35. The memory 35 stores temporary data necessary for processing executed by the measurement units 31 to 33, calculation results of the measurement units 31 to 33, and the like. An example of the memory 35 is a nonvolatile memory. Information on the person to be measured input to the input unit 12 is input to the first measurement unit 31 and stored in the memory 35. The measurement result of the pulse wave detection unit 20 is input to the second measurement unit 32 and stored in the memory 35.

The first measurement unit 31 calculates a subjective stress value P, which is an index that subjectively evaluates the strength of stress of the measurement subject, based on the subjective evaluation information input to the input unit 12. In one example, a subjective evaluation map that defines the relationship between the subjective evaluation information and the subjective stress value P is stored in the memory 35 in advance. The first measurement unit 31 uses the subjective evaluation map and the subjective evaluation information input to the input unit 12 to obtain a subjective stress value P corresponding to the subjective evaluation information.

The second measuring unit 32 calculates an objective stress value Q that is an index that objectively evaluates the strength of stress of the measurement subject based on the pulse wave information measured by the pulse wave detecting unit 20. In one example, the objective stress value Q is calculated by the following procedure.

First, the time between adjacent local maximum values in the time series data of the received light signal obtained by the light receiving unit 22 is calculated as the heartbeat interval PP. Next, PI (Percentage Index), which is a value indicating the change in the heartbeat interval PP as a percentage, is calculated from the following equation [1]. PPi in the formula [1] indicates the i-th measured heartbeat interval PP. Next, entropy E, which is an index of autonomic nerve activity, is calculated from the following equation [2], which is an equation of Shannon's average information amount. P shown in the equation [2] indicates the probability that the PI obtained by the equation [1] will occur. Next, a tone T that is an index of the balance of the autonomic nerve is calculated for each activity state of the living body by the following equation [3]. [3] M in the equation is the number of heartbeat intervals PP measured.

The second measuring unit 32 calculates an objective stress value Q based on the tone T and entropy E. In one example, an objective evaluation map that defines the relationship between the tone T and entropy E and the objective stress value Q is stored in the memory 35 in advance. The second measuring unit 32 uses the objective evaluation map and the calculated tone T and entropy E to obtain an objective stress value Q corresponding to the tone T and entropy E. Here, an evaluation method using entropy E and tone T as an index representing the state of the autonomic nerve is illustrated, but objective stress value Q may be calculated using an index different from entropy E and tone T. it can. An example of another index is a ratio (LF / HF) of an LF (Low Frequency) component and an HF (High Frequency) component obtained by a frequency analysis method.

Based on the subjective stress value P obtained by the first measurement unit 31 and the objective stress value Q obtained by the second measurement unit 32, the third measurement unit 33 determines the stress state of the measurement subject. measure. In one example, the third measuring unit 33 reads the stress state measurement map shown in FIG. 5 from the memory 35, and a point determined by the subjective stress value P and the objective stress value Q (hereinafter, “measurement point R”) belongs to it. The state of stress of the measurement subject is determined according to the area on the stress state measurement map. Thus, the third measuring unit 33 corresponds to any of a plurality of pre-classified stress states in which the subjectively measured stress intensity and the objectively measured stress intensity are combined. Judge whether to do. According to this method, when the measurement results by the subjective and objective methods are consistent and when the measurement results are not consistent, it can be determined as one of the stress states. The state can be measured more accurately.

The stress state measurement map is a coordinate plane defined by the coordinate axis related to the subjective stress value P and the coordinate axis related to the objective stress value Q, and the first area A1 corresponding to the first quadrant and the second area corresponding to the second quadrant. Area A2, a third area A3 corresponding to the third quadrant, and a fourth area A4 corresponding to the fourth quadrant.

The first area A1 is an area where the subjective stress value P is larger than the reference value PX and the objective stress value Q is larger than the reference value QX. In the first region A1, since the stress measured based on the subject's subjectivity and the stress measured objectively based on the pulse wave information are both strong, there is strong stress on the subject. It is strongly suggested that For this reason, when the measurement point R belongs to the first region A1, it is determined that the stress state of the measurement subject is the first stress state in which a strong stress that has been manifested exists.

The second area A2 is an area where the subjective stress value P is smaller than the reference value PX and the objective stress value Q is larger than the reference value QX. In the second region A2, the stress evaluated based on the subject's subjectivity is weak and the stress objectively evaluated based on the pulse wave information is strong, so the results of subjective evaluation and objective evaluation Are not consistent. This conflicting result can be interpreted as suggesting a state in which there is a stress that the measurement subject cannot recognize. For this reason, when the measurement point R belongs to the second region A2, it is determined that the stress state of the measurement subject is a second stress state in which strong stress that the measurement subject cannot recognize is latent.

The third area A3 is an area where the subjective stress value P is smaller than the reference value PX and the objective stress value Q is smaller than the reference value QX. In the third region A3, since both the stress measured based on the subject's subjectivity and the stress objectively measured based on the pulse wave information are weak, the stress held by the subject is weak. Or it strongly suggests that there is almost no stress in the measurement subject. For this reason, when the measurement point R belongs to the third region A3, the stress state of the measurement subject is weak, or the third stress in which the measurement subject has almost no stress. The state is determined.

The fourth area A4 is an area where the subjective stress value P is larger than the reference value PX and the objective stress value Q is smaller than the reference value QX. In the fourth region A4, since the stress evaluated based on the subjectivity of the measurement subject is strong and the stress evaluated objectively based on the pulse wave information is weak, the result of subjective evaluation and objective evaluation Are not consistent. This conflicting result can be interpreted as suggesting that the person being measured is stressed, but the stress is temporarily strong and transient. For this reason, when the measurement point R belongs to the fourth region A4, the stress state of the measurement subject is the fourth stress state in which there is a high possibility that the stress is a transient stress although the stress exists. Determined.

Referring to FIG. 6, an example of the stress state measurement procedure will be described.

In step S <b> 1, the user operates the input unit 12 to input information on the person to be measured to the stress measurement unit 30. The input information is stored in the memory 35. In step S2, the first measuring unit 31 calculates a subjective stress value P based on the subjective evaluation information. In step S3, the pulse wave detection unit 20 calculates the pulse wave information of the measurement subject. In step S4, the second measuring unit 32 calculates the tone T and entropy E based on the pulse wave information. In step S5, the second measuring unit 32 calculates an objective stress value Q based on the tone T and entropy E.

In step S6, the first measuring unit 31 stores the subjective stress value P in the memory 35, and the second measuring unit 32 stores the objective stress value Q in the memory 35. In step S7, the third measuring unit 33 determines whether or not the number of measurements of the subjective stress value P and the objective stress value Q has reached a predetermined number. The state of the person being measured and the measurement environment may affect the measurement results regarding the state of stress. For this reason, in order to improve the accuracy of the measurement result, it is preferable to obtain a final measurement result by combining a plurality of measurement results. Step S7 is a step for realizing this point. For this reason, according to this measurement procedure including step S7, the state of stress of the measurement subject is more accurately measured.

In step S8, the third measuring unit 33 calculates an average value of a plurality of subjective stress values P and an average value of a plurality of objective stress values Q. In step S9, based on the region where the measurement point R determined by the average value of the subjective stress value P and the average value of the objective stress value Q belongs in the stress state measurement map, the stress state is the first to fourth stress states. It is determined which is applicable. In step S <b> 10, the third measurement unit 33 transmits the measurement result of the stress state to the output unit 13. In step S11, the output unit 13 outputs the measurement result of the stress state. In one example, the output unit 13 displays a stress state measurement map as shown in FIG. 5 and measurement points R plotted thereon on the display device. When the output unit 13 includes a wireless transmission unit, a signal including the measurement result of the stress state is transmitted to an external device such as a portable information terminal. When the external device receives a signal from the output unit 13, the external device displays the coordinate plane and the measurement point R on a display device provided in the external device.

As described above, the measurement result obtained by the third measurement unit 33 is not only the measurement result based on the subjectivity of the measurement subject obtained by the first measurement unit 31 but also the stress obtained by the second measurement unit 32. Reflects objective measurement results. For this reason, compared with the case where the state of stress is measured based only on the subject's subjectivity, the state of stress of the subject can be measured accurately.

(Embodiment 2)
The biological information measuring apparatus 10 according to the second embodiment includes a configuration in which a part of the stress state measurement process according to the first embodiment is changed. In the stress state measurement process of the first embodiment, the measurement point R determined by the average value of the subjective stress value P and the average value of the objective stress value Q is displayed on the display device. On the other hand, in the stress state measurement process according to the second embodiment, the measurement unit R determined by each of the set of the measured subjective stress values P and objective stress values Q is displayed on the output unit 13. For example, when measurement is performed three times a day, and the first measurement point R1, the second measurement point R2, and the third measurement point R3, which are measurement points R, are obtained by each measurement, Each measurement point R1 to R3 is plotted on the stress state measurement map. FIG. 7 shows an example.

In addition to displaying each measurement point R, the output unit 13 further displays a line segment connecting the measurement points R so that a polygon having each measurement point R as a vertex is formed. In the example shown in FIG. 7, a triangle having each measurement point R as a vertex is displayed. The area of the polygon having each measurement point R as a vertex is considered to reflect, for example, the degree of stress intensity fluctuation (hereinafter referred to as “degree of fluctuation”). For this reason, the user can recognize the degree of variation from the size of the polygonal area.

In one example, the stress measuring unit 30 is provided with a function for obtaining the degree of variation. In this case, the stress measurement unit 30 calculates a polygonal area based on each measurement point R, determines whether the area is equal to or larger than the determination area, and causes the output unit 13 to output the result. When the area of the polygon is equal to or larger than the determination area, it is determined that the degree of variation is large. When the area of the polygon is less than the determination area, it is determined that the degree of variation is small.

(Embodiment 3)
The biological information measuring apparatus 10 according to the third embodiment has a configuration in which a part of the stress state measuring process according to the first embodiment is changed. In the stress state measurement process of the first embodiment, the final measurement result regarding the state of stress is determined using the stress state measurement map. On the other hand, in the stress state measurement process of the third embodiment, the total stress value obtained by integrating the subjective stress value P and the objective stress value Q using the subjective stress value P and the objective stress value Q and a predetermined function. U is calculated. In one example, the content of step S8 of the stress state measurement process of the first embodiment is changed as follows.

In the changed step S8, the third measuring unit 33 calculates the total stress value U in the following order. First, the correction coefficient α and the correction coefficient β are determined based on the characteristic information input to the input unit 12. The correction coefficient α is a weighting coefficient for the subjective stress value P. The correction coefficient β is a weighting coefficient for the objective stress value Q. The memory 35 stores a correction coefficient map that defines the relationship between the characteristic information, the correction coefficient α, and the correction coefficient β. Next, the total stress value U is calculated from the following equation [4].

The third measurement unit 33 causes the output unit 13 to output the total stress value U as a final measurement result regarding the stress state. In another example, the third measuring unit 33 determines whether the total stress value U belongs to a plurality of predetermined ranks, and outputs the determined rank as a final measurement result regarding the stress state. 13 to output.

In addition, the description regarding each said embodiment is an illustration of the form which the biological information measuring device which concerns on this indication can take, and it does not intend restrict | limiting the form. The biological information measuring device according to the present disclosure may take another form in which a part of each embodiment is changed, for example.

The biological information measuring apparatus according to the present disclosure can be used to check the stress of the measurement subject in various scenes such as a medical institution and a home, including a worker's stress check based on the stress check system.

DESCRIPTION OF SYMBOLS 10 Biological information measuring device 31 1st measurement part 32 2nd measurement part 33 3rd measurement part

Claims

A first measurement unit that measures stress based on the subjectivity of the measurement subject;
A second measuring unit that measures stress based on the biological information of the person to be measured;
A biological information measurement apparatus comprising: a third measurement unit that measures stress based on a measurement result of the first measurement unit and a measurement result of the second measurement unit.
The third measurement unit determines whether a combination of a measurement result of the first measurement unit and a measurement result of the second measurement unit corresponds to a plurality of types of stress states defined in advance. The biological information measuring device according to 1.
The third measurement unit has a low stress intensity estimated from the measurement result of the first measurement unit, and a high stress intensity estimated from the measurement result of the second measurement unit. The biological information measuring device according to claim 1, wherein it is determined that there is a stress that the measurement subject cannot recognize.
The third measurement unit measures stress based on a plurality of measurement results acquired from the first measurement unit and a plurality of measurement results acquired from the second measurement unit. 4. The biological information measuring device according to any one of 3 above.
2. At least one of a measurement result of the first measurement unit, a measurement result of the second measurement unit, and a measurement result of the third measurement unit is corrected based on characteristics of the measurement subject. The biological information measuring device according to any one of 1 to 4.