Vibration comfort degree testing method based on human body multi-signal change
By analyzing the multi-signal of EEG, ECG and IEM in the vibrating environment, judging comfort and analyzing the vibration attenuation rules, the problem that the existing technology cannot fully reflect the human comfort level is solved, and more accurate comfort assessment and building functional zoning suggestions are achieved.
Patent Information
- Application Number
- CN202411688824.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-03-07
AI Technical Summary
The prior art cannot fully reflect the comfort of the human body in a vibrating environment, and does not consider the actual situation where the changes in the human body's electrical signal change with the attenuation of vibration.
By collecting and analyzing the multiple signal changes of the tester's EEG, EK and EMI, we judge the degree of brain power, cardiac strength, and muscle fatigue, determine the vibration comfort level, and judge the attenuation level of vibration response based on the signal reference value changes, providing guidance on building partitioning.
It achieves a more direct and accurate judgment of the comfort in the vibration environment, which can better reflect the comfort of the human body in different environments, and provides effective functional partitioning suggestions to ensure the physical and mental health of the people.
Smart Images
Figure CN119574018A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a vibration comfort testing method for a building, and in particular to a vibration comfort testing method based on multi-signal changes of a human body. Background Art
[0002] Vibration comfort refers to the degree of satisfaction of the human body with the environment in a vibrating environment. Comfort is actually a trinity indicator. Muscle fatigue can cause discomfort on the physical level, mental fatigue can cause discomfort on the mental level, and mental fatigue affects the state of the whole person, which can cause discomfort at the mildest level and harm health at the worst. Existing research mainly focuses on the reflection of comfort level by one of the EEG signals, ECG signals, and EMG signals. The corresponding equipment is used to collect the corresponding type of signals of the test personnel, and then the comfort level is quantified according to the test personnel's subjective response to the comfort level. Finally, the corresponding signal limit is sorted out to determine whether the comfort level is satisfied. This evaluation method cannot fully reflect the comfort level of the human body in a certain environment. Moreover, the existing technology does not take into account the fact that the changes in the human body's electrical signals change with the attenuation of vibration. Summary of the invention
[0003] In view of the above technical problems, the present invention discloses a vibration comfort testing method based on multi-signal changes of the human body. By testing the changes of EEG, ECG and EMG signals, the degree of mental fatigue, mental fatigue and muscle fatigue can be intuitively judged, so as to judge whether the comfort level is met; when the comfort level is met, the attenuation degree of the vibration response is judged according to the degree of change of the reference values of EEG, ECG and EMG signals, so as to give guiding suggestions for the zoning of buildings.
[0004] To this end, the technical solution adopted by the present invention is:
[0005] A vibration comfort testing method based on multi-signal changes of human body comprises the following steps:
[0006] Step S1, evenly arranging excitation equipment and testers on any layer of the structure to be tested, and collecting EEG, ECG, and surface electromyography signal data of the testers on that layer under vibration excitation;
[0007] Step S2, determining the comprehensive fatigue limit of the tester under the mental, heart and muscle fatigue state;
[0008] Step S3, setting an excitation device on at least one layer of the structure to be tested, evenly setting testers on each layer of the structure to be tested, and collecting brain, heart and muscle force signals of the testers at different distances and different layers in the structure to be tested under vibration excitation;
[0009] Step S4, sorting out the brain power, heart power and muscle power signals of the tester in step S3, and taking the sum of the three types of signals of each tester as the comprehensive fatigue reference value of the individual tester;
[0010] Step S5, compare the comprehensive fatigue reference value of all testers in step S3 with the comprehensive fatigue limit value. If the comprehensive fatigue reference value is greater than the comprehensive fatigue limit value, the vibration condition does not meet the comfort requirement and vibration control measures need to be taken; if the comprehensive fatigue reference value is less than or equal to the comprehensive fatigue limit value, the vibration condition meets the comfort requirement.
[0011] With this technical solution, in step S1, the vibration excitation of the equipment and the test personnel are evenly arranged in a single layer of the structure to be tested, so as to determine the comprehensive fatigue limit. Then, in step S3, the test personnel are arranged in each layer of the structure to be tested, and the comprehensive fatigue values of the test personnel at different distances and positions of the structure to be tested are obtained, so as to obtain a comparison between the comprehensive fatigue reference value and the comprehensive fatigue limit value, derive the comfort conditions, and further guide the functional zoning.
[0012] Based on the test of EEG, ECG and surface electromyography signals, the comprehensive fatigue limit is obtained to better reflect the comfort of the human body in a certain environment.
[0013] As a further improvement of the present invention, the vibration comfort test method based on multi-signal changes of the human body also includes: step S6, analyzing the vibration attenuation law according to the relationship between the average comprehensive fatigue reference value of the test person and the distance and number of floors.
[0014] As a further improvement of the present invention, step S1 includes: evenly arranging n testers and m devices in any layer of the structure to be tested, arranging electroencephalogram testers on the heads of the n testers, arranging electrocardiogram testers at the heart position, and arranging surface electromyography testers on the back, buttocks, and legs to collect the electroencephalogram, electrocardiogram, and electromyography signals of the testers; after the test starts, when the tester feels uncomfortable due to vibration during the test, the tester exits the test and the signal collection ends; when the last tester exits the test, the test ends.
[0015] As a further improvement of the present invention, n=3m.
[0016] As a further improvement of the present invention, in step S2, the average of the maximum values of the beta wave frequency of all test persons is counted as the limit value of mental fatigue; the average of the maximum values of the QRS wave group duration of all test persons is counted as the limit value of mental fatigue; the average of the maximum values of the myoelectric frequency of all test persons is counted as the limit value of muscle fatigue; the sum of the above three types of indicator limits is taken as the comprehensive fatigue limit value;
[0017] As a further improvement of the present invention, in step S2, the principles for selecting and grouping testers are as follows: the male-female ratio is 1:1; the age is 18-30 years old: 30-40 years old: 40-50 years old = 1:1:1; the BMI is less than 18.5: greater than 18.5 and less than 23: greater than 23 = 1:1:1.
[0018] As a further improvement of the present invention, in step S3, p testers are evenly arranged on each layer of the structure to be tested, and p testers are replaced after the test is completed. A total of q tests are performed, and equipment is arranged only at one position on a certain layer of the structure to be tested; an electroencephalogram tester is arranged on the head of the tester, an electrocardiogram tester is arranged at the heart position, and a surface electromyography tester is arranged on the back, buttocks, and legs; after the test starts, the electroencephalogram, electrocardiogram, and electromyography signals of the tester are collected, and the electrical signals of the tester are collected. The setting of the tester should follow the following principles: the ratio of men to women on each layer is 1:1; age 18-30 years old: 30-40 years old: 40-50 years old = 1:1:1; BMI is grouped according to less than 18.5: greater than 18.5 and less than 23: greater than 23 = 1:1:1. In this technical solution, the purpose of grouping is mainly to ensure that people of all ages and physical fitness participate in the test in the same proportion, so as to avoid the influence of individual deviations of the testers.
[0019] As a further improvement of the present invention, in step S4, calculations are performed respectively according to the groups in each layer, and the value with the smallest value is taken as the comprehensive fatigue reference value of the test person.
[0020] As a further improvement of the present invention, in step S6, the average comprehensive fatigue reference value of the testers at different positions of the equipment excitation layer and the distance from the excitation source in q tests are analyzed to obtain the relationship between the vibration attenuation and the distance from the vibration source; the average comprehensive fatigue reference value of the testers at the same projection point position on the upper and lower o adjacent layers of the equipment excitation layer and the number of layers away from the equipment excitation layer are analyzed to obtain the relationship between the vibration attenuation and the number of layers away from the vibration source.
[0021] The present invention also discloses the application of the vibration comfort test method based on multi-signal changes of the human body as described above, and the partitioning of the structure to be tested is performed according to the relationship between the obtained vibration attenuation and the number of layers from the vibration source.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] The technical solution of the present invention is adopted to test the human brain electroencephalogram, electrocardiogram, and electromyography signals to obtain the signal reference value under vibration conditions, and directly judge whether the comfort level is satisfied based on human perception. Compared with the prior art, the judgment method is more direct by testing the structural vibration response index, performing post-processing, and referring to the specification, and the result is more in line with human perception and more accurate. And according to the test method obtained by the present invention, the comprehensive fatigue limit range of each floor of the building under vibration of the overall structure can be obtained, thereby guiding the layout of the functional zoning of each floor, so that under vibration conditions, there are no staff members within the comprehensive fatigue limit range, and the physical and mental health of the staff is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a flow chart of a vibration comfort testing method based on multi-signal changes of the human body according to an embodiment of the present invention.
[0025] Figure 2 It is a schematic diagram of setting up a tester and a stimulus device in step S1 of an embodiment of the present invention.
[0026] Figure 3 It is a schematic diagram of setting the tester and the stimulus device in step S3 of an embodiment of the present invention.
[0027] Figure 4 It is a schematic diagram of analysis of step S6 of an embodiment of the present invention. DETAILED DESCRIPTION
[0028] The preferred embodiments of the present invention are described in further detail below.
[0029] A vibration comfort test method based on multi-signal changes of the human body, such as Figure 1 As shown, the following steps are included:
[0030] S1. Under vibration excitation, collect the EEG, ECG and surface electromyography signals of the test personnel in the structure to be tested: use the vibration of the equipment as the excitation source, and use the mental, heart and muscle fatigue of the test personnel in the structure as the standard to end the test and collect their surface electromyography signals.
[0031] S2. Determine the comprehensive fatigue limit under the state of mental, heart and muscle fatigue: During the test, if the tester feels uncomfortable, he / she shall quit the test and record his / her EEG, ECG and EMG signals. The test ends when all testers quit. The average of the maximum values of the EEG Beta wave frequency of all testers is counted as the limit of mental fatigue; the average of the maximum value of the QRS wave group duration of the ECG is used as the limit of heart fatigue; the average of the maximum value of the EMG frequency is used as the limit of muscle fatigue; the sum of the above three types of indicator limits is used as the comprehensive fatigue limit.
[0032] S3. Collect the brain, heart and muscle strength signals of testers at different distances and levels within the structure.
[0033] S4. Arrange the tester's mental, heart and muscle strength signals, and take the sum of the three types of signals of each tester as the comprehensive fatigue reference value of the individual tester.
[0034] S5. Compare the comprehensive fatigue reference value of all testers with the comprehensive fatigue limit value: if the comprehensive fatigue reference value is greater than the limit value, the vibration condition does not meet the comfort requirement and vibration control measures need to be taken; if the comprehensive fatigue reference value is less than or equal to the limit value, the vibration condition meets the comfort requirement.
[0035] S6. Analyze the vibration attenuation law based on the relationship between the average comprehensive fatigue reference value of the test personnel and the distance and number of layers.
[0036] Wherein, step S1 includes: evenly arranging n testers in a certain layer of the structure to be tested, see Figure 2 Small and medium people, and evenly arrange m devices, see Figure 2 In the square, an EEG tester is placed on the head of n testers, an ECG tester is placed at the heart position, and a surface electromyography tester is placed on the back, buttocks, and legs to collect the EEG, ECG, and EMG signals of the testers. After the test starts, the equipment starts to operate. If the tester feels uncomfortable due to vibration during the test, he or she can quit the test and end the signal collection. When the last tester quits the test, the test ends.
[0037] The more test personnel n, the smaller the sample error. The number of m devices should be suitable for the number of test personnel n, that is, n=3m. The test personnel and equipment are evenly arranged in the structure. The criterion for test personnel to exit the test is discomfort. Since each person's physical condition is different, the selection and judgment criteria of test personnel will be described in detail in the next step.
[0038] In step S2, the frequency of the Beta wave in the EEG signal that can reflect the degree of concentration is selected as a mental fatigue judgment indicator; the duration of the QRS wave group in the ECG signal that can reflect whether the heart rate is normal is selected as a mental fatigue judgment indicator; the frequency of the surface electromyography signal that can reflect the state of muscle tension is selected as a muscle fatigue judgment indicator; the Beta wave frequency in the EEG signal should be maintained within a certain limit. The closer it is to this limit, the more difficult it is to concentrate; the duration of the QRS wave group in the ECG signal should be maintained within a certain limit. The closer it is to this limit, the more obvious palpitations, chest tightness and other symptoms are; the frequency in the electromyography signal should be maintained within a certain limit. The closer it is to this limit, the more obvious muscle fatigue is.
[0039] Due to differences in people's physical conditions, a person's gender, age, height, and body mass index (BMI) will all affect the degree of fatigue. Therefore, the setting of testers should follow the following principles: the ratio of male to female is 1:1; age 18-30 years old: 30-40 years old: 40-50 years old = 1:1:1; BMI is grouped according to less than 18.5: greater than 18.5 and less than 23: greater than 23 = 1:1:1.
[0040] The correction calculation of the indicators is carried out according to different groups. The calculated limit values of different groups are compared, and the limit value of the lowest group is taken as the comprehensive fatigue limit value. For example, the limit value measured by the female group aged 40-50 years old with a BMI less than 18.5 is the lowest, so the data limit value of this group is used as the unified limit value for all groups. Because the physical conditions of people working in the structure are different, it is necessary to ensure that those with the worst physical condition can work normally in the structure, so as to ensure that everyone can work normally.
[0041] In step S3, Figure 3 As shown, n testers are evenly arranged on each floor of the building structure to be tested, and n testers are replaced after the test. A total of m tests are performed (the larger the n and m, the more accurate the test results). Equipment is arranged only at one location on a certain floor, and an electroencephalogram tester is arranged on the head of the tester, an electrocardiogram tester is arranged at the heart position, and surface electromyography testers are arranged on the back, buttocks, and legs. After the test starts, the equipment is operated to collect the electroencephalogram, electrocardiogram, and electromyography signals of the tester, and the collected electrical signals of the tester are recorded. The setting of the tester n should follow the following principles: the ratio of men to women on each floor is 1:1; the age is 18-30 years old: 30-40 years old: 40-50 years old = 1:1:1; BMI is grouped according to less than 18.5: greater than 18.5 and less than 23: greater than 23 = 1:1:1. Further preferably, n and m satisfy: n = 3m.
[0042] In step S4, calculation is performed according to the grouping of each layer, and the value with the smallest value is taken as the comprehensive fatigue reference value of the test person.
[0043] In step S5, if the comprehensive fatigue reference value of the personnel in the equipment excitation layer is less than the comprehensive fatigue limit value, since the vibration effect of the equipment excitation layer is the most obvious, it is considered that the overall structure meets the comfort requirements under this vibration condition; when the comprehensive fatigue reference value of the equipment excitation layer is greater than the comprehensive fatigue limit value in the table, it is considered that the vibration condition does not meet the comfort requirements.
[0044] In step S6, if the vibration condition meets the comfort requirement, the average comprehensive fatigue reference value of the test personnel at different positions of the equipment excitation layer and the distance from the excitation source are analyzed, such as Figure 4By analyzing the average comprehensive fatigue reference value of all testers A in m tests and the average comprehensive fatigue reference value of all testers B in m tests, the relationship between vibration attenuation and the distance from the vibration source can be analyzed; the average comprehensive fatigue reference value of the testers at the same projection point position of the adjacent upper and lower o layers of the equipment excitation layer and the size of the number of layers from the equipment excitation layer can be analyzed, such as Figure 4 By analyzing the average comprehensive fatigue reference value of all tester A in m tests and the average comprehensive fatigue reference value of all testers C and D in m tests, the relationship between vibration attenuation and the number of layers from the vibration source can be analyzed.
[0045] Based on the above analysis, the range of each partition of the device under test can be obtained.
[0046] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.
Claims
1. A vibration comfort test method based on multi-signal changes of the human body, characterized in that: The steps include: Step S1, evenly arranging excitation equipment and testers on any layer of the structure to be tested, and collecting EEG, ECG, and surface electromyography signal data of the testers on that layer under vibration excitation; Step S2, determining the comprehensive fatigue limit of the tester under the mental, heart and muscle fatigue state; Step S3, setting an excitation device on at least one layer in the structure to be tested, evenly setting testers on each layer of the structure to be tested, and collecting brain, heart and muscle force signals of the testers at different distances and different layers in the structure to be tested under vibration excitation; Step S4, sorting out the brain power, heart power and muscle power signals of the tester in step S3, and taking the sum of the three types of signals of each tester as the comprehensive fatigue reference value of the individual tester; Step S5, compare the comprehensive fatigue reference value of all testers in step S3 with the comprehensive fatigue limit value. If the comprehensive fatigue reference value is greater than the comprehensive fatigue limit value, the vibration condition does not meet the comfort requirement and vibration control measures need to be taken; if the comprehensive fatigue reference value is less than or equal to the comprehensive fatigue limit value, the vibration condition meets the comfort requirement.
2. The vibration comfort testing method based on human body multi-signal changes according to claim 1 is characterized in that: The method further comprises: step S6, analyzing the vibration attenuation law according to the relationship between the average comprehensive fatigue reference value of the test personnel and the distance and the number of layers.
3. The vibration comfort testing method based on human body multi-signal changes according to claim 2 is characterized in that: Step S1 includes: evenly arranging n testers and m equipment in any layer of the structure to be tested, arranging electroencephalogram testers on the heads of the n testers, arranging electrocardiogram testers at the heart position, and arranging surface electromyography testers on the back, buttocks, and legs to collect the electroencephalogram, electrocardiogram, and electromyography signals of the testers; after the test starts, if the tester feels uncomfortable due to vibration during the test, the tester quits the test and the signal collection ends; when the last tester quits the test, the test ends.
4. The vibration comfort testing method based on human body multi-signal changes according to claim 3 is characterized in that: n=3m.
5. The vibration comfort testing method based on human body multi-signal changes according to claim 3 is characterized in that: In step S2, the average of the maximum values of the EEG Beta wave frequencies of all test persons is calculated as the limit of mental fatigue; the average of the maximum values of the ECG QRS wave group duration of all test persons is calculated as the limit of mental fatigue; the average of the maximum values of the myoelectric frequency of all test persons is calculated as the limit of muscle fatigue; and the sum of the above three types of indicator limits is taken as the comprehensive fatigue limit.
6. The vibration comfort testing method based on human body multi-signal changes according to claim 5 is characterized in that: In step S2, the testers are selected and grouped according to the following principles: male to female ratio is 1:1; age is 18-30 years old: 30-40 years old: 40-50 years old = 1:1:1; BMI is less than 18.5: greater than 18.5 and less than 23: greater than 23 = 1:1:1; Take the lowest group limit as the comprehensive fatigue limit.
7. The vibration comfort testing method based on human body multi-signal changes according to claim 5, characterized in that: In step S3, p testers are evenly arranged on each layer of the structure to be tested, and p testers are replaced after the test is completed. A total of q tests are performed, and equipment is only arranged at one location on a certain layer of the structure to be tested; Place an EEG tester on the tester's head, an ECG tester on the heart, and a surface electromyography tester on the back, buttocks, and legs. After the test begins, the EEG, ECG and EMG signals of the testers are collected and the collected electrical signals of the testers are displayed. The setting of the testers should follow the following principles: the ratio of men to women in each layer is 1:1; age 18-30 years old: 30-40 years old: 40-50 years old = 1:1:1; BMI is grouped according to less than 18.5: greater than 18.5 and less than 23: greater than 23 = 1:1:
1.
8. The vibration comfort testing method based on human body multi-signal changes according to claim 5, characterized in that: In step S4, calculations are performed according to the groups in each layer, and the minimum value is taken as the comprehensive fatigue reference value of the test person.
9. The vibration comfort testing method based on human body multi-signal changes according to claim 8, characterized in that: In step S6, the average comprehensive fatigue reference value of the testers at different positions of the equipment excitation layer and the distance from the excitation source in q tests are analyzed to obtain the relationship between vibration attenuation and the distance from the vibration source; the average comprehensive fatigue reference value of the testers at the same projection point position on the upper and lower o adjacent layers of the equipment excitation layer and the number of layers away from the equipment excitation layer are analyzed to obtain the relationship between vibration attenuation and the number of layers away from the vibration source.
10. Application of the vibration comfort testing method based on human body multi-signal changes as claimed in claim 9, characterized in that: Based on the relationship between the vibration attenuation and the number of layers from the vibration source, the partitions of the structure to be tested are set.