CN117547268A - Mental stress or tension index detection method and device - Google Patents
Mental stress or tension index detection method and device Download PDFInfo
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Abstract
A method of detecting a stress or strain index comprising: s1, acquiring skin internal resistance, blood oxygen saturation and pulse rate of a plurality of users showing different mental stress or tension indexes to obtain a plurality of sample data sets containing the mental stress or tension indexes; s2, establishing a relation model among skin internal resistance, blood oxygen saturation, pulse rate and mental stress or tension index based on the plurality of sample data sets; s3, measuring the skin internal resistance, blood oxygen saturation and pulse rate of the user in real time, substituting the measured values into the relation model, and calculating and outputting the mental stress or tension index of the user. The invention can calculate the mental stress or tension index based on the internal resistance of skin, the blood oxygen saturation and the pulse rate, and can be used as the judgment basis of the fatigue degree and the health state of the user based on the mental stress or tension index and also can be used as the early warning before the blood pressure detection of the user.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a method and a device for detecting mental stress or tension index.
Background
Fatigue refers to a state in which the work efficiency of the body tends to decrease due to excessive physical or mental work for a long time or under excessive stress under certain environmental conditions. The human body can reduce or destroy physiological kinetic energy under the fatigue state for a long time, thereby causing various diseases and affecting the health of the human body.
At present, the fatigue evaluation mainly comprises a subjective evaluation method, a questionnaire method, a physiological reaction test method, a biochemical method and the like, and the methods are limited by a detection method and conditions, so that objective quantification is difficult to achieve, and continuous dynamic measurement cannot be achieved. In recent years, researchers have developed to perform fatigue evaluation by applying bioelectrical signals such as electroencephalogram, electrocardiograph, myoelectricity, etc., based on the phenomenon that human brain waves, electrocardiograph, myoelectricity change when a person is fatigued. But each also has certain drawbacks:
the electroencephalogram signal acquisition system is expensive, and the contact type measurement mode and equipment thereof are easy to cause discomfort of a tested person after long-time contact, so that the practical application of the electroencephalogram signal in human body fatigue detection is hindered.
The deficiency of electrocardiosignal acquisition is poor sensitivity and diagnosis, and comprehensive research is needed by combining other analysis methods.
The measurement instrument and the practical operability of the electromyographic signal are not very practical.
All three methods need to perform multipoint collection during collection, which brings inconvenience to users. The method has the advantages that the signals acquired by the method are single, and the judgment on the fatigue degree is more unilateral; if the methods are combined, the devices adopted by the methods cannot be integrated in one device, so that the device is inconvenient to use and high in cost, and the fatigue judgment result after the three methods are combined is not researched, so that the fatigue judgment result is more comprehensive and accurate.
Therefore, how to solve the above-mentioned drawbacks of the prior art is a subject to be studied and solved by the present invention.
Disclosure of Invention
The invention aims to provide a mental stress or tension index detection method and device.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a method of detecting a stress or strain index comprising:
s1, acquiring skin internal resistance, blood oxygen saturation and pulse rate of a plurality of users showing different mental stress or tension indexes to obtain a plurality of sample data sets containing the mental stress or tension indexes;
s2, establishing a relation model among skin internal resistance, blood oxygen saturation, pulse rate and mental stress or tension index based on the plurality of sample data sets;
s3, measuring the skin internal resistance, blood oxygen saturation and pulse rate of the user in real time, substituting the measured values into the relation model, and calculating and outputting the mental stress or tension index of the user.
In a further scheme, in S2, a relationship model is established by adopting multiple linear regression, and a multiple linear regression model for detecting the stress or tension index is obtained:
Y＝a 1 *R -1 +a 2 *S+a 3 *P+b
wherein Y represents mental stress or tension index, R represents internal resistance of skin, S represents blood oxygen saturation, P represents pulse rate, a 1 、a 2 、a 3 And b is a model regression parameter.
There are studies showing that: when the human body is stimulated by visual, auditory and pain feeling and emotions, the resistance between two points of the skin is reduced; the peripheral mechanism of the change of the surface resistance of human skin has obvious relation with sweat gland activity. When sweat gland activity changes to a certain extent, the conductivity of skin changes obviously, and sweat gland activity is mainly regulated by sympathetic nerves; the close relationship between skin resistance and emotion is well established today.
In addition, the applicant found through experimental studies that: in different states of fatigue, the blood oxygen saturation and pulse rate in the human body also change greatly.
Therefore, the scheme combines three parameters of blood oxygen saturation, pulse rate and internal resistance of human body to judge the mental stress or tension degree of the human body, and the method is feasible and accurate after test verification.
The detection device for realizing the mental stress or tension index detection method comprises an oximeter, an internal resistance measurement mechanism and a processing module;
the oximeter is used for measuring blood oxygen saturation and pulse rate;
the internal resistance measuring mechanism is used for measuring the internal resistance of the skin;
the oximeter and the internal resistance measuring mechanism are electrically connected with the processing module, and the processing module is used for realizing S1-S3.
In a further scheme, the internal resistance measuring mechanism comprises two thin film resistors, wherein the two thin film resistors are attached to the upper surface and the lower surface of the finger to form a passage, and the passage is connected with an internal resistance measuring circuit.
In a further scheme, the internal resistance measurement circuit comprises a reference resistor and an ADC;
the input end of the reference resistor is connected with a power supply, the output end of the reference resistor is connected with the passage in series, and the passage is grounded;
the ADC is connected in parallel with two ends of the channel and is used for measuring the voltages of the two ends of the channel;
the output end of the ADC is electrically connected with the processing module, and the processing module calculates the skin internal resistance of the finger based on the resistance value of the reference resistor, the output voltage of the power supply and the voltages at the two ends of the channel.
In a further scheme, the internal resistance measurement circuit is arranged in the oximeter, two thin film resistors are arranged on the upper surface and the lower surface of a measurement cavity of the oximeter and are attached to the upper surface and the lower surface of a finger of a user under driving, the power supply is a power supply of the oximeter, and the processing module is a CPU of the oximeter.
In a further embodiment, two of the thin film resistors are disposed near the entrance of the measurement cavity.
In a further scheme, the oximeter adopts a finger-clip oximeter, an upper shell and a lower shell of the finger-clip oximeter are rotationally connected, and an elastic connecting piece for generating clamping force between the upper shell and the lower shell is arranged at the rotational connection part; the measuring cavity is formed between the upper shell and the lower shell, the two thin film resistors are respectively arranged on the opposite surfaces of the upper shell and the lower shell, and are driven by the elastic connecting piece to move close to or far from the fingers of a user.
In a further scheme, the oximeter is provided with a display module for displaying the internal resistance of skin, the saturation of blood oxygen, the pulse rate and the stress or tension index, and the display module is electrically connected with the processing module.
The working principle and the advantages of the invention are as follows:
the invention collects the internal resistance of skin, the blood oxygen saturation and the pulse rate of a large number of users showing different mental stress or tension indexes, builds a relation model among the internal resistance of skin, the blood oxygen saturation, the pulse rate and the mental stress or tension indexes by using regression analysis and other methods, and can calculate the mental stress or tension index of the users by measuring the internal resistance of skin, the blood oxygen saturation and the pulse rate when in actual use, and can be used as a judgment basis for the fatigue degree and the health state of the users and also can be used as an early warning before the blood pressure detection of the users;
the finger clip type blood oxygen instrument and the internal resistance measuring mechanism are integrally arranged, the blood oxygen saturation, the pulse rate and the skin internal resistance can be accurately measured by using the clamping force of the finger clip type blood oxygen instrument, the CPU of the blood oxygen instrument is used for processing and calculating the measured data, the mental pressure or tension index can be calculated and displayed on the display, the measured result is visually displayed, the whole machine structure is small and exquisite, the carrying is convenient, the accurate result can be obtained by single measurement, and the user is convenient.
Drawings
FIG. 1 is a schematic diagram of an integrated device of an oximeter and an internal resistance measuring mechanism of the present invention;
FIG. 2 is a cross-sectional view of an integrated oximeter and internal resistance measurement mechanism of the present invention;
FIG. 3 is a circuit diagram of the internal resistance measurement mechanism of the present invention;
fig. 4 is a circuit diagram of the internal resistance measuring mechanism with the filtering function of the present invention.
In the above figures: 1. an oximeter; 11. an oxygen probe; 12. a housing; 13. a measurement cavity; 2. an internal resistance measurement mechanism; 21. a thin film resistor; 22. a reference resistor; an adc analog-to-digital converter; 3.a processing module; 4. and a display module.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples:
examples: the present invention will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present invention, without departing from the spirit and scope of the present invention, as will be apparent to those of skill in the art upon understanding the embodiments of the present invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Singular forms such as "a," "an," "the," and "the" are intended to include the plural forms as well, as used herein.
As used herein, "connected" or "positioned" may refer to two or more components or devices in physical contact with each other, or indirectly, or in operation or action with each other.
As used herein, the terms "comprising," "including," "having," and the like are intended to be open-ended terms, meaning including, but not limited to.
The term (terms) as used herein generally has the ordinary meaning of each term as used in this field, in this disclosure, and in the special context, unless otherwise noted. Certain terms used to describe the present disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description herein.
The terms "front", "rear", "upper", "lower", "left", "right" and the like used herein are directional terms, and are merely used to describe positional relationships among the structures in the present application, and are not intended to limit the present protection scheme and the specific direction in actual implementation.
Referring to fig. 1 to 3, a detecting device for detecting mental stress or tension index comprises an oximeter 1, an internal resistance measuring mechanism 2, a processing module 3 and a display module 4.
The oximeter 1 is used for measuring blood oxygen saturation and pulse rate; the oximeter 1 comprises an oximeter probe 11 (optical sensor), a CPU and a power supply, wherein the power supply provides stable 2.5V voltage for the oximeter probe 11 and the CPU, the CPU controls the oximeter probe 11 to collect the blood oxygen saturation and pulse rate of a human body, analog signals collected by the two blood oxygen probes are converted into digital signals, the digital signals are sent to a display module 4 for display, and the display module 4 is a display.
The oximeter 1 adopts a finger-clip oximeter 1, an upper shell 12 and a lower shell 12 of the finger-clip oximeter are rotationally connected, and an elastic connecting piece which generates clamping force between the upper shell 12 and the lower shell 12 is arranged at the rotational connection part; the measuring chamber 13 is formed between the upper and lower housings 12.
The internal resistance measuring mechanism 2 is used for measuring the internal resistance of the skin; the internal resistance measuring mechanism 2 comprises two thin film resistors 21, wherein the two thin film resistors 21 are attached to the upper surface and the lower surface of the finger to form a passage, and the passage is connected with an internal resistance measuring circuit;
the internal resistance measuring circuit comprises a reference resistor 22 and an ADC (analog to digital converter) 23;
the input end of the reference resistor 22 is connected with a power supply to provide stable 2.5V voltage for the internal resistance measuring mechanism 2, the output end of the reference resistor 22 is connected with the passage in series, and the passage is grounded;
the ADC 23 is connected in parallel to the two ends of the path for measuring the voltage V across the path AVBAT The method comprises the steps of carrying out a first treatment on the surface of the The specific principle is that the ADC analog-to-digital converter 23 converts the analog signal of the voltage (i.e. the voltage at both ends of the channel) output to the processing module 3 into a digital signal, and calculates the digital signal to obtain a voltage value readable by naked eyes;
the output end of the ADC analog-to-digital converter 23 is electrically connected to the processing module 3, and the processing module 3 is based on the resistance R10 of the reference resistor 22, the output voltage of the power supply 2.5V, and the voltage V at two ends of the path AVBAT Calculating the internal resistance R11 of the skin of the finger;
since the reference resistor 22 is connected in series with the path, the ADC 23 is connected in parallel with the path, soI.e. < ->
R10 is a fixed value of 2Ω when V AVBAT After the measurement, the internal resistance R11 of the skin can be calculated.
In addition, a capacitor C15 may be further disposed in parallel connection between the ADC 23 and the path, and the output voltage may be filtered, as shown in fig. 4.
In order to facilitate simultaneous measurement of blood oxygen saturation, pulse rate and skin internal resistance, the internal resistance measurement mechanism 2 is arranged in the oximeter 1, and two thin film resistors 21 are arranged on the upper surface and the lower surface of a measurement cavity 13 of the oximeter 1 and are arranged close to an inlet of the measurement cavity 13; the two thin film resistors 21 are attached to the upper and lower surfaces of the fingers of the user under driving, the power supply of the oximeter 1 can be used as the power supply of the internal resistance measuring mechanism 2, and the processing module 3 can be the CPU of the oximeter 1.
When the oximeter 1 adopts the finger-clip oximeter 1, the upper and lower shells 12 are rotationally connected, and an elastic connecting piece for generating clamping force between the upper and lower shells 12 is arranged at the rotational connection position; the measuring cavity 13 is formed between the upper and lower shells 12, and the two thin film resistors 21 are respectively arranged on the opposite surfaces of the upper and lower shells 12 and driven by the elastic connecting piece to move close to or far from the fingers of the user. Therefore, during measurement, the upper shell 12 and the lower shell 12 can be opened, the two shells 12 are closed after the fingers of a user are placed in the measurement cavity 13, and the fingers are in a clamping state at the moment, so that the collection work of the internal resistance of the skin, the blood oxygen saturation and the pulse rate can be performed.
When the detection device is used for detecting the stress or tension index of the user, the detection method is as follows:
in this way, the internal resistance of the skin collected by the internal resistance measuring mechanism 2 and the blood oxygen saturation and pulse rate collected by the blood oxygen instrument 1 can be processed by the CPU and sent to the display for display, the CPU can also detect the mental stress or tension index based on the internal resistance of the skin, the blood oxygen saturation and pulse rate, and the obtained index is also displayed by the display, and the specific detection method of the mental stress or tension index is as follows:
s1, acquiring skin internal resistance, blood oxygen saturation and pulse rate of a plurality of users presenting different mental stress or tension indexes by using an oximeter 1 and an internal resistance measuring mechanism 2 to obtain a plurality of sample data sets, wherein each data set comprises the skin internal resistance, the blood oxygen saturation, the pulse rate and the mental stress or tension index; wherein the stress or stress level index comprises a mild stress or level, a moderate stress or level, and a deep stress or level, represented by index 1, index 2, and index 3, respectively; the user is a non-critically ill population.
In order to accurately calculate the stress or strain index of the user at the time of measurement, a large number of experiments are required and related data are collected, including data related to internal skin resistance, blood oxygen saturation and pulse rate of different populations (non-critically ill populations). The test process comprises the following steps: each subject was allowed to extract a set of data every five seconds in three states (the parameters of these three states are relatively typical in the process of performing state analysis and actual detection) of listening to music in a calm state, sitting after exercise, and generating gas. The following list ten samples of subjects P1-P10:
TABLE 1 measurement of subject P1 (female) in different states
TABLE 2 measurement of subject P2 (female) in different states
TABLE 3 measurement of subject P3 (Male) in different states
TABLE 4 measurement of subject P4 (female) in different states
TABLE 5 measurement of subject P5 (Male) in different states
TABLE 6 measurement of subject P6 (Male) in different states
TABLE 7 measurement of subject P7 (female) in different states
TABLE 8 measurement of subject P8 (Male) in different states
TABLE 9 measurement of subject P9 (female) in different states
TABLE 10 measurement of subject P10 (Men) in different states
According to the measurement data of the ten testees, the blood oxygen saturation, the pulse rate and the internal resistance of the human body can be greatly changed under different fatigue states of the human body.
S2, the processing module 3 establishes a relation model among skin internal resistance, blood oxygen saturation, pulse rate and mental stress or tension index based on the plurality of sample data sets; the method specifically comprises the following steps:
s21. selecting a multiple linear regression model y=b+a 1 *x 1 +a 2 *x 2 ...a n *x n Wherein Y is a dependent variable, x 1 、x 2 ...x n Is an independent variable, a 1 、a 2 ...a n Is a regression coefficient;
s22, eliminating abnormal data sets with serious abnormality in the plurality of sample data sets, and reserving normal data sets;
s23, model fitting: fitting the normal data set by using a multiple linear regression model, and estimating regression coefficients by using a least square method to obtain a relationship model among the internal resistance of skin, the blood oxygen saturation, the pulse rate and the stress or tension index:
Y＝a 1 *R -1 +a 2 *S+a 3 *P+b
wherein Y represents mental stress or tension index, R represents internal resistance of skin, S represents blood oxygen saturation, P represents pulse rate, a 1 、a 2 、a 3 And b is a model regression parameter.
S3, measuring the skin internal resistance, blood oxygen saturation and pulse rate of the user in real time by using the oximeter 1 and the internal resistance measuring mechanism 2, substituting the obtained measured values into the relation model by the processing module 3, and calculating and outputting the mental stress or tension index of the user. Based on the mental stress or tension index, the method can be used as a judging basis for the physical health of the user; when the index of mental stress or tension is higher, for example, 2 or 3, the blood pressure detection is carried out at the moment, and the detection result is inaccurate, so that the index can be used as a prompt and early warning basis before the blood pressure detection.
The accuracy of the present test device and method was verified by selecting a plurality of volunteers as follows, and using the above test device and method to measure the stress or tension index of each volunteer in three consecutive times, each time at five seconds intervals, and comparing the stress or tension index with the stress or tension evaluation index of the volunteer by the doctor, and the test data of ten volunteers are listed below:
note that: 1 represents a calm state, 2 represents a process of generating qi, and 3 represents a process after severe exercise.
Through the test verification, the mental stress or tension index detected by the blood oxygen saturation, the pulse rate and the internal skin resistance can be used as the judgment basis of the fatigue degree and the health state of the user.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (9)
1. A method for detecting a stress or strain index, comprising:
s1, acquiring skin internal resistance, blood oxygen saturation and pulse rate of a plurality of users showing different mental stress or tension indexes to obtain a plurality of sample data sets containing the mental stress or tension indexes;
s2, establishing a relation model among skin internal resistance, blood oxygen saturation, pulse rate and mental stress or tension index based on the plurality of sample data sets;
s3, measuring the skin internal resistance, blood oxygen saturation and pulse rate of the user in real time, substituting the measured values into the relation model, and calculating and outputting the mental stress or tension index of the user.
2. A method of detecting a stress or strain index according to claim 1, wherein: and S2, establishing a relation model by adopting multiple linear regression to obtain a multiple linear regression model for detecting the mental stress or tension index:
Y＝a 1 *R -1 +a 2 *S+a 3 *P+b
wherein Y represents mental stress or tension index, R represents internal resistance of skin, S represents blood oxygen saturation, P represents pulse rate, a 1 、a 2 、a 3 And b is a model regression parameter.
3.A detection device for implementing a method for detecting a stress or strain index according to any one of claims 1 to 2, characterized in that: the detection device comprises an oximeter, an internal resistance measurement mechanism and a processing module;
the oximeter is used for measuring blood oxygen saturation and pulse rate;
the internal resistance measuring mechanism is used for measuring the internal resistance of the skin;
the oximeter and the internal resistance measuring mechanism are electrically connected with the processing module, and the processing module is used for realizing S1-S3.
4. A stress or strain index detection device according to claim 3, wherein: the internal resistance measuring mechanism comprises two thin film resistors, wherein the two thin film resistors are attached to the upper surface and the lower surface of the finger to form a passage, and the passage is connected with an internal resistance measuring circuit.
5. A stress or strain index testing device according to claim 4 wherein: the internal resistance measurement circuit comprises a reference resistor and an ADC (analog-to-digital converter);
the input end of the reference resistor is connected with a power supply, the output end of the reference resistor is connected with the passage in series, and the passage is grounded;
the ADC is connected in parallel with two ends of the channel and is used for measuring the voltages of the two ends of the channel;
the output end of the ADC is electrically connected with the processing module, and the processing module calculates the skin internal resistance of the finger based on the resistance value of the reference resistor, the output voltage of the power supply and the voltages at the two ends of the channel.
6. A stress or strain index detection device according to claim 5, wherein: the internal resistance measuring circuit is arranged in the oximeter, the two thin film resistors are arranged on the upper surface and the lower surface of a measuring cavity of the oximeter and are attached to the upper surface and the lower surface of a finger of a user under driving, the power supply is a power supply of the oximeter, and the processing module is a CPU of the oximeter.
7. A stress or strain index detection device according to claim 6, wherein: the two thin film resistors are arranged close to the inlet of the measuring cavity.
8. A stress or strain index detection device according to claim 6, wherein: the oximeter adopts a finger-clip oximeter, an upper shell and a lower shell of the finger-clip oximeter are rotationally connected, and an elastic connecting piece which generates clamping force between the upper shell and the lower shell is arranged at the rotational connection part; the measuring cavity is formed between the upper shell and the lower shell, the two thin film resistors are respectively arranged on the opposite surfaces of the upper shell and the lower shell, and are driven by the elastic connecting piece to move close to or far from the fingers of a user.
9. A method and apparatus for detecting stress or strain index according to claim 3, wherein: the oximeter is provided with a display module for displaying the internal resistance of skin, the blood oxygen saturation, the pulse rate and the mental stress or tension index, and the display module is electrically connected with the processing module.
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| CN202311415301.6A CN117547268A (en) | 2023-10-27 | 2023-10-27 | Mental stress or tension index detection method and device |
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