CN107242871B - Method for automatically distinguishing four electrodes and eight electrodes in human body impedance measurement - Google Patents
Method for automatically distinguishing four electrodes and eight electrodes in human body impedance measurement Download PDFInfo
- Publication number
- CN107242871B CN107242871B CN201710504216.5A CN201710504216A CN107242871B CN 107242871 B CN107242871 B CN 107242871B CN 201710504216 A CN201710504216 A CN 201710504216A CN 107242871 B CN107242871 B CN 107242871B
- Authority
- CN
- China
- Prior art keywords
- impedance
- electrode
- electrodes
- measurement
- feet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0537—Measuring body composition by impedance, e.g. tissue hydration or fat content
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7271—Specific aspects of physiological measurement analysis
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physiology (AREA)
- Psychiatry (AREA)
- Signal Processing (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention discloses a method for automatically judging four and eight electrodes in human body impedance measurement, which accurately judges whether eight-electrode measurement or four-electrode measurement is used or not by respectively measuring bioelectrical impedance between two hands and two feet, and can be switched to a corresponding mode. The invention adopts a cross-drive multi-electrode measuring method and a direct measuring mode of multi-section parts to quickly judge and measure the testee, judges whether the testee carries out eight-electrode measurement or four-electrode measurement at present and switches to a corresponding measuring mode. From this, can make eight electrode body fat appearance also can compatible four electrode measurement, and automatic intelligent judgement, bring the convenience for the person that is surveyed, bring more product selection simultaneously for manufacturing enterprise.
Description
Technical Field
The invention belongs to the technical field of human body bioelectrical impedance measurement, and particularly relates to a method for distinguishing four electrodes from eight electrodes in human body impedance measurement of a human body scale.
Background
Along with the popularization and application of the BIA (bioelectrical impedance) technology, products for detecting the health condition of a human body by acquiring human body composition parameters through the BIA are more and more abundant, a mode for acquiring impedance information is also evolved from 2 electrodes to 4 electrodes and 8 electrodes, exciting current is also increased to multi-band analysis from single frequency, detected parameters are more and more abundant, not only can impedance values be detected, but also various human body compositions are calculated and acquired to provide more accurate and useful references for health life, and more layers of support and guarantee are provided for human body health monitoring. The current technology mainly uses four-electrode and eight-electrode measuring modes. The four electrodes are convenient and simple to measure, but the acquisition part is limited, so that the measured data are less. Eight electrodes are relatively complex in measurement, but accurate data measurement can be carried out on all sections of the human body.
In the prior art, all the body scales are single four-electrode lipid meters. If the segment body data needs to be accurately measured, an eight-electrode body fat instrument must be purchased, but the eight-electrode body fat instrument cannot be tested according to a four-electrode body fat instrument. Under the actual measurement condition, the testee more hopes to have a body fat meter which can measure four or eight electrodes, and can automatically distinguish and switch to the corresponding four or eight electrode measurement mode according to the electrode contacted by the testee. The original technology can greatly improve the use cost and is extremely inconvenient to use.
As patent application 201610597869.8 discloses a human impedance measuring device and human composition analysis appearance thereof, relates to human composition detection technical field, and human impedance measuring device wherein includes: the device comprises a detection electrode unit, a measurement circuit unit, an analog switch unit and a signal acquisition unit; the detection electrode unit is connected with the measurement circuit unit, and the measurement circuit unit is connected with the signal acquisition unit through the analog switch unit: the detection electrode unit is in contact with a human body and used for outputting detection current, and the measurement circuit unit is internally provided with an operational amplifier which is used for amplifying the detection current. The human body impedance measuring device and the human body composition analyzer thereof can adopt the operational amplifier to amplify the detection current, can amplify effective signals, have high input impedance and low output impedance, and can overcome the influence of upper limbs and lower limbs when detecting the impedance of the trunk, so that the measuring result is more accurate, and more accurate biological composition data can be obtained. However, this method still uses a single four-electrode or eight-electrode body fat meter, and cannot realize switching between body fat meters in multiple structural forms, which is not favorable for people to use.
In a word, because the bioelectrical impedance signal of the measured human body is weak, the influence of interference signals such as polarization voltage on the electrode slice can interfere the acquired data, the existing body fat meter is fixed in a four-electrode measurement mode or an eight-electrode measurement mode, some people use eight electrodes to carry out simple and convenient four-electrode measurement when roughly knowing the body composition, some people use eight electrodes to carry out accurate eight-electrode measurement when wanting to know the body composition in detail, the measurement of the measured person according to the current measurement mode is limited by the use and adjustment of the measured person, the use mode of people cannot be distinguished, and inconvenience is brought to the measured person.
Disclosure of Invention
Based on this, the primary objective of the present invention is to provide a method for automatically determining four and eight electrodes in human body impedance measurement, which uses a cross-drive multi-electrode measurement method, and a multi-segment direct measurement method to rapidly determine and measure the subject, and determine whether the subject currently performs eight-electrode measurement or four-electrode measurement, and switch to a corresponding measurement mode.
Another objective of the present invention is to provide a method for automatically determining four and eight electrodes in human body impedance measurement, which enables an eight-electrode lipid meter to be compatible with four-electrode measurement, and has the advantages of automatic and intelligent determination, convenience for the measured person, no additional cost, simple implementation and low cost.
The research shows that: the four-electrode body fat instrument is mainly used for measuring the impedance of a human body and calculating and analyzing the components of the whole body by measuring four electrodes between two feet, and the eight-electrode body fat instrument is used for accurately measuring the impedance of each section of the human body in a segmented manner and calculating and analyzing the components of the whole body by eight electrodes of two feet and two hands. When the testee only wants to simply carry out four-electrode measurement, the testee only needs to stand on four electrodes of two feet with bare feet, and the body fat meter automatically judges that the four-electrode measurement is carried out and switches to a corresponding measurement mode. When a testee wants to accurately measure the eight electrodes, two hands are in contact with the four electrodes of the two hands, and the body fat meter automatically judges that the measurement is the eight-electrode measurement when the feet stand on the four electrodes of the two feet, and switches to a corresponding measurement mode.
Therefore, in order to achieve the purpose, the technical scheme of the invention is as follows:
a method for automatically distinguishing four electrodes and eight electrodes in human body impedance measurement comprises the following steps:
101. measuring the bioelectrical impedance between the two feet;
specifically, the method comprises the following steps:
1011. exciting the left foot to the right foot, and measuring the bioelectrical impedance BZ12 between the two feet;
1012. exciting the foot from the right to the left, and measuring the bioelectrical impedance BZ21 between the two feet;
102. judging whether the impedance between the two feet is in the impedance range between the two feet of a normal human body; judging whether the standing posture of the two feet is correct and the contact with the electrode is normal;
further comprising:
1021. and judging whether the two electrical impedances of the BZ12 and the BZ21 are in the impedance range between the feet of the normal human body.
1022. And judging the absolute value of the difference value of the two electrical impedances of BZ12 and BZ21, and if the absolute value of the difference is within a normal threshold value W, judging that the standing posture of the two feet is correct and the contact with the electrodes is normal.
103. Measuring the bioelectrical impedance between the two hands;
specifically, the method comprises the following steps:
1031. exciting from left hand to right hand, and measuring bioelectrical impedance BZ34 between the two hands;
1032. judging whether the BZ34 impedance is within the normal human body impedance range between two hands;
1033. and judging whether the BZ33 and the BZ44 impedances are in a normal single-leg impedance range or not.
104. Exciting the left foot to the left hand, and measuring the bioelectrical impedance BZ33 between the two feet at the moment;
105. and judging whether the BZ33 impedance is within the normal human body single-leg impedance range.
106. Exciting from the right foot to the right hand, and measuring the bioelectrical impedance BZ44 between the two feet at the moment;
107. and judging whether the BZ44 impedance is within the normal human body single-leg impedance range.
108. If the conditions are met, the eight-electrode measurement mode is judged and switching is carried out, otherwise, the four-electrode measurement mode is considered and switching is carried out.
The method for automatically judging the four and eight electrodes in the human body impedance measurement, which is realized by the invention, adopts a cross-drive multi-electrode measurement method and carries out rapid judgment and measurement on a testee in a multi-section position direct measurement mode, judges whether the testee carries out eight-electrode measurement or four-electrode measurement at present, and switches to a corresponding measurement mode. Therefore, the eight-electrode grease meter can be compatible with four-electrode measurement and can automatically and intelligently judge. Bringing convenience to the testee.
Meanwhile, the method can realize two functions of four-electrode measurement and eight-electrode measurement only by the eight-electrode grease meter, is simple and convenient to realize, brings convenience to production enterprises, is convenient to reduce the manufacturing cost, and does not need to additionally manually set a test mode.
Drawings
FIG. 1 is a schematic diagram of a four electrode measurement implemented in the prior art.
Fig. 2 is a schematic diagram of an eight electrode measurement implemented by the prior art.
Figure 3 is a flow chart of body impedance measurements performed by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a four-electrode measurement mode is adopted in the prior art and the invention. Referring to fig. 2, the eight-electrode measurement mode adopted by the present invention is also known in the prior art.
The flow chart of the measuring method realized by the invention is shown in figure 3. The current excitation electrode is firstly output from the left foot electrode plate and input from the right foot electrode plate, then the voltage value between the left foot and the right foot is measured, and the impedance value BZ12 between the two electrodes is calculated. And then exchanging the current excitation and the voltage measurement electrode, wherein the current excitation is output from the right foot electrode plate and input from the left foot electrode plate, then measuring the voltage value between the left foot electrode and the right foot electrode, and calculating the impedance value BZ21 between the two electrodes. If any impedance value of BZ12 and BZ21 exceeds the impedance value (200 ohm-1.5K ohm) in the normal range or the absolute value of the difference value of BZ12 and BZ21 exceeds the threshold value BZY, the standing posture error or the lower limb four-electrode contact failure can be judged. At the moment, the human body impedance measurement mode can be exited, and errors are reported to prompt that the four-electrode measurement of the lower limbs of the user is abnormal.
If the four-electrode measurement of the lower limb is normal, the eight-electrode measurement can be distinguished. Firstly, current excitation electrodes are output from a left-hand electrode plate and input from a right-hand electrode plate, then voltage values between the left hand and the right hand are measured, an impedance value BZ34 between the two electrodes is calculated, whether the impedance of BZ34 is in a normal single-leg impedance range or not is judged, if the impedance value of BZ34 exceeds the normal range impedance value (250 ohm-1.5K ohm), the two-hand electrodes are considered not to be in contact, the eight-electrode measurement mode exits, and the four-electrode measurement mode returns.
If BZ34 impedance is normal, the next eight electrode measurement discrimination can be continued. Firstly, the current excitation electrode is output from a left foot electrode plate and input from a left hand electrode plate, then the voltage value between the left foot and the right foot is measured, the impedance value BZ33 between the two electrodes is calculated, whether the impedance of BZ33 is in the normal single-leg impedance range or not is judged, if the impedance value BZ33 exceeds the normal range impedance value (100 ohm-500K ohm), the left hand electrode is considered not to be well contacted, and a user can be reminded to hold a handle or exit from an eight-electrode measurement mode, and then the four-electrode measurement mode is returned.
If BZ33 impedance is normal, the next eight electrode measurement discrimination can be continued. Firstly, the current excitation electrode is output from a 'right foot electrode plate', input from a 'right hand electrode plate', then the voltage value between the 'right foot' and the 'left foot' is measured, the impedance value BZ44 between the two electrodes is calculated, whether the impedance of BZ44 is in the normal single-leg impedance range is judged, if the impedance value of BZ44 exceeds the normal range impedance value (100 ohm-500 ohm), the right hand electrode is considered not to be in good contact, and a user can be reminded to hold a handle or exit from an eight-electrode measurement mode, and then the four-electrode measurement mode is returned.
If all the above conditions are satisfied normally, the subject is considered to be in the eight-electrode measurement mode. The data were measured in each case, and their data sheet is referred to in the attached Table 1.
In a word, the method for automatically distinguishing the four electrodes and the eight electrodes in the human body impedance measurement, which is realized by the invention, adopts a cross-drive multi-electrode measurement method and carries out rapid judgment and measurement on a testee in a multi-section position direct measurement mode, judges whether the testee carries out eight-electrode measurement or four-electrode measurement at present, and switches to a corresponding measurement mode. Therefore, the eight-electrode grease meter can be compatible with four-electrode measurement and can automatically and intelligently judge. Bringing convenience to the testee.
Meanwhile, the method can realize two functions of four-electrode measurement and eight-electrode measurement only by the eight-electrode grease meter, is simple and convenient to realize, brings convenience to production enterprises, is convenient to reduce the manufacturing cost, and does not need to additionally manually set a test mode.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A method for automatically distinguishing four electrodes and eight electrodes in human body impedance measurement is characterized by comprising the following steps:
101. measuring the bioelectrical impedance between the two feet;
102. judging whether the impedance between the two feet is in the impedance range between the two feet of a normal human body; judging whether the standing posture of the two feet is correct and the contact with the electrode is normal;
103. measuring the bioelectrical impedance between the two hands;
104. exciting the left foot to the left hand, and measuring the bioelectrical impedance BZ33 between the two feet at the moment;
105. judging whether the BZ33 impedance is within the normal human body single leg impedance range;
106. exciting from the right foot to the right hand, and measuring the bioelectrical impedance BZ44 between the two feet at the moment;
107. judging whether the BZ44 impedance is within the normal human body single leg impedance range;
108. if the conditions are met, the eight-electrode measurement mode is judged and switching is carried out, otherwise, the four-electrode measurement mode is considered and switching is carried out.
2. The method of claim 1 for automatically identifying four and eight electrodes in human impedance measurement, wherein the step 101 generally comprises:
1011. exciting the left foot to the right foot, and measuring the bioelectrical impedance BZ12 between the two feet;
1012. the bioelectrical impedance BZ21 between the two feet is measured by exciting the foot from the right to the left.
3. The method for automatically discriminating between four and eight electrodes in human impedance measurement as claimed in claim 2, wherein said step 102 further comprises:
1021. judging whether the two electrical impedances of BZ12 and BZ21 are in the impedance range between the two feet of a normal human body;
1022. and judging the absolute value of the difference value of the two electrical impedances of BZ12 and BZ21, and if the absolute value of the difference is within a normal threshold value W, judging that the standing posture of the two feet is correct and the contact with the electrodes is normal.
4. The method of claim 3 for automatically identifying four or eight electrodes in human impedance measurement, wherein the step 103 comprises:
1031. exciting from left hand to right hand, and measuring bioelectrical impedance BZ34 between the two hands;
1032. judging whether the BZ34 impedance is within the normal human body impedance range between two hands;
1033. and judging whether the BZ33 and the BZ44 impedances are in a normal single-leg impedance range or not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504216.5A CN107242871B (en) | 2017-06-27 | 2017-06-27 | Method for automatically distinguishing four electrodes and eight electrodes in human body impedance measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504216.5A CN107242871B (en) | 2017-06-27 | 2017-06-27 | Method for automatically distinguishing four electrodes and eight electrodes in human body impedance measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107242871A CN107242871A (en) | 2017-10-13 |
| CN107242871B true CN107242871B (en) | 2021-01-19 |
Family
ID=60014193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710504216.5A Active CN107242871B (en) | 2017-06-27 | 2017-06-27 | Method for automatically distinguishing four electrodes and eight electrodes in human body impedance measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107242871B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108652622B (en) * | 2018-03-13 | 2021-07-06 | 广东乐心医疗电子股份有限公司 | Method and system for automatically detecting human body components |
| CN109350056A (en) * | 2018-12-04 | 2019-02-19 | 芯海科技（深圳）股份有限公司 | Mobile terminal for bodily fat measurement and the body fat measuring method based on the terminal |
| CN110974224A (en) * | 2019-11-21 | 2020-04-10 | 芯海科技（深圳）股份有限公司 | Human body composition parameter measuring method and device, electronic equipment and storage medium |
| CN113679370B (en) * | 2020-05-19 | 2024-05-17 | 华为技术有限公司 | A body composition detection method, device and computer readable storage medium |
| CN113796848B (en) * | 2020-05-29 | 2024-02-06 | 芯海科技（深圳）股份有限公司 | Human body impedance measurement method, device and computer readable storage medium |
| CN113456050B (en) * | 2021-07-23 | 2023-12-19 | 芯海科技（深圳）股份有限公司 | Human body impedance measuring device and human body impedance measuring method |
| CN115462775A (en) * | 2022-08-16 | 2022-12-13 | 深圳市伊欧乐科技有限公司 | Body fat scale control method, body fat scale and storage medium |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393276C (en) * | 2005-07-29 | 2008-06-11 | 浙江工业大学 | Body Fat Measuring Device |
| CN100421617C (en) * | 2006-08-16 | 2008-10-01 | 中山市创源电子有限公司 | A human body impedance measuring device and a fat meter using the device |
| CN101496720B (en) * | 2009-03-06 | 2010-08-25 | 南京大学 | Biological electric impedance analyzer based on USB |
| KR200449735Y1 (en) * | 2010-04-07 | 2010-08-05 | 주식회사 지테크인터내셔날 | Device for measuring of body fat |
| CN103162781B (en) * | 2011-12-19 | 2016-01-27 | 天津九安医疗电子股份有限公司 | A kind of weighing scale with measuring body composition function |
| CN103123669B (en) * | 2013-02-28 | 2016-03-30 | 大连大学 | A kind of body composition analysis's method based on genetic algorithm |
| CN105496409A (en) * | 2016-01-19 | 2016-04-20 | 北京四海华辰科技有限公司 | Human body composition analyzer |
| CN105486393A (en) * | 2016-01-20 | 2016-04-13 | 惠州市开蒙实业有限公司 | Body fat weigher |
| CN106618569A (en) * | 2016-11-10 | 2017-05-10 | 中国人民解放军第四军医大学 | Measuring device and method for contact impedance between electrodes and skin |
-
2017
- 2017-06-27 CN CN201710504216.5A patent/CN107242871B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| An in-vivo electrical property based health monitoring sensor;Safa Salman 等;《2013 7th European Conference on Antennas and Propagation (EuCAP)》;20130412;785-786 * |
| 一种新型的基于四电极结构的生物电阻测量方法;王家海 等;《机电一体化》;20100725;65-71 * |
| 基于ARM_Linux的便携式人体阻抗分析仪设计;杨淇仁 等;《微计算机信息》;20100315;第26卷(第3-2期);119-121 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107242871A (en) | 2017-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107242871B (en) | Method for automatically distinguishing four electrodes and eight electrodes in human body impedance measurement | |
| CN100421617C (en) | A human body impedance measuring device and a fat meter using the device | |
| US9149235B2 (en) | Oedema detection | |
| CN106618569A (en) | Measuring device and method for contact impedance between electrodes and skin | |
| CN107928658B (en) | Human body scale for heart rate measurement and heart rate measurement method | |
| AU648637B2 (en) | Fertility probe | |
| US8535225B2 (en) | Integrated colligation evaluating device for human body enginery indexes | |
| CN205067611U (en) | Hand -held type crop blade electric capacity resistance measurement appearance | |
| AU2003302594A1 (en) | Live finger detection by four-point measurement of complex impedance | |
| CA2777797A1 (en) | Fluid level indicator determination | |
| US20200359931A1 (en) | Body Composition Scale and Body Composition Measurement Program | |
| CN109171722B (en) | Bioimpedance measurement circuit, bioimpedance measurement method and wearable device | |
| CN107432745B (en) | Method for judging wrong standing posture in human body impedance measurement | |
| CN108113653B (en) | A body fat measurement device and method based on the fusion of 3D scanning and bioelectrical impedance technology | |
| CN108652608B (en) | Human body scale and method for measuring heart rate | |
| US20040181163A1 (en) | Fat analyzer | |
| CN209770372U (en) | Device for measuring extracellular fluid electrical impedance and total moisture electrical impedance | |
| JP2003116803A (en) | Electric characteristic measuring system | |
| CN113049149B (en) | Portable Y balance intelligent testing device | |
| KR20170037704A (en) | Multielectrode to measure chest impedance and measuring method of chest impedance using the multielectrode | |
| CN204909448U (en) | Fat scale | |
| CN209236147U (en) | A kind of biological impedance circuit and wearable device | |
| CN108652622A (en) | Method and system for automatically detecting human body components | |
| CN106725474A (en) | A kind of human body impedance detection method | |
| CN222217827U (en) | LED guide body fat scale |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |