CN113796848B - Human body impedance measurement method, device and computer readable storage medium - Google Patents
Human body impedance measurement method, device and computer readable storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000002847 impedance measurement Methods 0.000 title claims abstract description 37
- 230000005284 excitation Effects 0.000 claims abstract description 85
- 230000002159 abnormal effect Effects 0.000 claims abstract description 48
- 238000005259 measurement Methods 0.000 claims description 59
- 230000009471 action Effects 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000003071 parasitic effect Effects 0.000 description 5
- 238000005303 weighing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000037396 body weight Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Classifications
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/7405—Details of notification to user or communication with user or patient ; user input means using sound
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/742—Details of notification to user or communication with user or patient ; user input means using visual displays
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/7455—Details of notification to user or communication with user or patient ; user input means characterised by tactile indication, e.g. vibration or electrical stimulation
Abstract
The invention discloses a human body impedance measurement method, a device and a computer readable storage medium. Wherein the method comprises the following steps: measuring a first impedance value of the measured object according to the first excitation signal; judging whether the first impedance value is in a preset effective impedance range or not; when the first impedance value is in the effective impedance range, measuring a second impedance value of the measured object according to the second excitation signal, and determining a physiological parameter of the measured object according to the second impedance value; wherein the frequency of the first excitation signal is lower than the frequency of the second excitation signal. Therefore, the abnormal state in the measuring process can be identified more accurately, erroneous judgment is avoided, and the accuracy and reliability of the human body impedance measuring result are improved.
Description
Technical Field
The present invention relates to the field of electronic scales, and in particular, to a method and apparatus for measuring impedance of a human body, and a computer readable storage medium.
Background
In the existing human body impedance measurement technology, the feet of the measured object are required to be barefoot and well contact with the electrodes, so that the human body impedance measurement is convenient to perform. When the feet of the measured object are in contact with the electrodes, in order to acquire accurate electrode signals, the standing state or the electrode contact state of the measured object is generally judged by performing cross driving and measurement on the current excitation electrode and the voltage measurement electrode. However, when the distance between the two electrodes is relatively short, if the measurement is performed at a relatively high frequency, signal coupling is caused by parasitic capacitance between the two electrodes, so that the two feet of the measured object are not in good contact with the electrodes, or the situation that shoes are worn by the two feet cannot be effectively identified. Particularly, the main flow measurement frequency of the current human body component analysis is 50KHz, and at the frequency, when the distance between two electrodes is smaller than 15mm, the abnormal state cannot be effectively identified, so that the false measurement of the human body impedance can be possibly caused, and bad use experience is brought to a user.
Disclosure of Invention
In order to solve the above technical drawbacks in the prior art, the present invention provides a method for measuring impedance of a human body, which includes:
measuring a first impedance value of the measured object according to the first excitation signal;
judging whether the first impedance value is in a preset effective impedance range or not;
when the first impedance value is in the effective impedance range, measuring a second impedance value of the measured object according to the second excitation signal, and determining a physiological parameter of the measured object according to the second impedance value;
wherein the frequency of the first excitation signal is lower than the frequency of the second excitation signal.
Optionally, after determining whether the first impedance value is within the preset effective impedance range, the method further includes:
when the first impedance value is not in the effective impedance range, the measurement state of the measured object is determined to be an abnormal state.
Optionally, measuring a first impedance value of the measured object according to the first excitation signal is: applying a first excitation signal to the measured object through the electrode, and measuring a first impedance value of the measured object under the action of the first excitation signal;
after determining that the measurement state of the measured object is an abnormal state, the method further comprises the following steps:
and outputting first prompt information according to the abnormal state, wherein the first prompt information is used for prompting at least one of abnormal standing position of the tested object and abnormal contact state of the tested object and the electrode.
Optionally, after determining that the measurement state of the measured object is an abnormal state, the method further includes:
if the measured state of the measured object is continuously in an abnormal state within the preset adjustment time, outputting second prompt information, wherein the second prompt information is used for prompting measurement errors.
Optionally, the body impedance measurement method is applied to a body impedance measurement device, the body impedance measurement device having at least two electrodes for conducting the first excitation signal and the second excitation signal to the object under test;
before judging whether the first impedance value is within the preset effective impedance range, the method further comprises the following steps:
the effective impedance range is determined based on the distance between the at least two electrodes.
Optionally, the body impedance measurement device comprises a first electrode pair and a second electrode pair, the first electrode pair comprising a first measurement electrode and a first excitation electrode, the second electrode pair comprising a second measurement electrode and a second excitation electrode, the effective impedance range being determined from a distance between at least two electrodes, comprising:
determining an effective impedance range from a first distance between the first measurement electrode and the first excitation electrode; alternatively, the effective impedance range is determined from a second distance between the second measurement electrode and the second excitation electrode.
Optionally, determining the effective impedance range from the distance between the at least two electrodes includes:
and judging the magnitude relation between the first distance and the second distance, if the first distance is larger than the second distance, determining the effective impedance range according to the second distance, and if the first distance is smaller than the second distance, determining the effective impedance range according to the first distance.
Optionally, the frequency of the second excitation signal is 50KHz, and the frequency of the first excitation signal is less than 30KHz.
Optionally, the present invention also proposes a body impedance measurement device comprising a memory, a processor and a computer program stored on said memory and executable on said processor, which when executed by said processor implements the steps of the body impedance measurement method as claimed in any one of the preceding claims.
Optionally, the present invention further proposes a computer readable storage medium, on which a body impedance measurement program is stored, which when executed by a processor implements the steps of the body impedance measurement method according to any one of the preceding claims.
The method has the advantages that the first impedance value of the measured object is measured according to the first excitation signal; judging whether the first impedance value is in a preset effective impedance range or not; when the first impedance value is in the effective impedance range, measuring a second impedance value of the measured object according to the second excitation signal, and determining a physiological parameter of the measured object according to the second impedance value; wherein the frequency of the first excitation signal is lower than the frequency of the second excitation signal. Therefore, the abnormal state in the measuring process can be identified more accurately, erroneous judgment is avoided, and the accuracy and reliability of the human body impedance measuring result are improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of a method for measuring human body impedance according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a body impedance device for implementing a body impedance measurement method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another body impedance device for implementing a method for measuring body impedance according to an embodiment of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present invention, and have no specific meaning per se. Thus, "module," "component," or "unit" may be used in combination.
In order to enable those skilled in the art to better understand the present invention, a clear and complete description of the technical solution in the present embodiment will be provided below with reference to the accompanying drawings in the present embodiment. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a flowchart of a method for measuring impedance of a human body according to an embodiment of the present invention. In one embodiment, the invention provides a method for measuring impedance of a human body, comprising:
s1, measuring a first impedance value of a measured object according to a first excitation signal;
s2, judging whether the first impedance value is in a preset effective impedance range;
s3, when the first impedance value is in the effective impedance range, measuring a second impedance value of the measured object according to the second excitation signal, and determining the physiological parameter of the measured object according to the second impedance value; wherein the frequency of the first excitation signal is lower than the frequency of the second excitation signal.
For a better understanding of the body weight measurement method of the present embodiment, please refer to fig. 2, fig. 2 shows a measurement schematic diagram when the body impedance measurement method of the present embodiment is implemented by using the body impedance measurement apparatus. As shown in fig. 2, the body impedance measuring apparatus is provided with a carrying panel on which an electrode 1 and an electrode 2 are provided, the electrode 1 and the electrode 2 being respectively used for contacting soles of a subject. In normal measurement activities, the feet of the measured object are in a barefoot state, and the feet are in good contact with the electrode 1 and the electrode 2 respectively, and in the process, the measurement of the human body impedance value of the measured object can be realized through a conventional excitation signal. However, when the distance between the electrodes 1 and 2 is relatively short and the conventional excitation signal is used for measurement, the frequency of the excitation signal is relatively high, and the parasitic capacitance between the electrodes 1 and 2 may cause signal coupling, so that when the feet of the measured object are not in good contact with the electrodes or shoes are worn on the feet, an impedance value within a normal impedance value range of the human body can still be detected. In order to solve the above technical problems, through long-time research and practice, the inventor finds that the excitation signal with a lower frequency can reduce or even avoid signal coupling caused by parasitic capacitance between two electrodes, so in this embodiment, the impedance values of the human body are measured by adopting the excitation signals with the low frequency and the high frequency sequentially, the impedance measurement is performed by the excitation signal with the lower frequency to determine whether the measurement state is abnormal, and when the measurement state is confirmed to be normal, the impedance value of the human body of the measured object is measured by the excitation signal with the higher frequency.
As one embodiment, first, a preset effective impedance range is acquired, and the effective impedance range is used for determining whether a measured object is in an abnormal measurement state; then, applying a first excitation signal with lower frequency to the measured object and measuring a first impedance value of the measured object under the action of the first excitation signal, if the first impedance value is not in a preset effective impedance range, determining that the current standing position of the measured object is abnormal or the contact state of the measured object and the electrode is abnormal, for example, at least one of the two feet of the measured object is not in good contact with the electrode; or, the feet of the measured object do not stand on the scale completely; or the distance between the feet of the measured object is too far or too close, etc.
The effective impedance range can be determined by applying a first excitation signal with a lower frequency to the experimenters in a normal measurement state and according to the human body impedance values of a plurality of experimenters under the action of the first excitation signal. Because the excitation signal with lower frequency can reduce or even avoid signal coupling caused by parasitic capacitance between the two electrodes, when the standing position of the measured object is abnormal or the contact state with the electrodes is abnormal, the impedance value measured by the excitation signal with lower frequency does not fall into the effective human body impedance range due to signal coupling, and therefore erroneous judgment on the measurement state is not caused.
Further, when the first impedance value is not within the preset effective impedance range, it can be determined that the current measurement state does not meet the normal measurement condition, no subsequent measurement activity is performed, if the first impedance value is within the preset effective impedance range, it is determined that the current measurement state of the measured object meets the normal measurement condition, then a second impedance value of the measured object is further measured by using a second excitation signal with higher frequency, and a physiological parameter of the measured object is determined according to the second impedance value.
In this embodiment, a first impedance value of the measured object is measured according to the first excitation signal, specifically: applying a first excitation signal to the measured object through the electrode, and measuring a first impedance value of the measured object under the action of the first excitation signal; measuring a second impedance value of the measured object according to the second excitation signal, specifically: and applying a second excitation signal to the measured object through the electrode, and measuring a second impedance value of the measured object under the action of the second excitation signal.
The beneficial effect of this embodiment is that the impedance measurement is performed by the excitation signal with lower frequency to determine whether the measurement state is abnormal, and when the measurement state is confirmed to be normal, the impedance value of the human body of the measured object is measured by the excitation signal with higher frequency. Therefore, the abnormal state in the measuring process can be identified more accurately, erroneous judgment is avoided, and the accuracy and reliability of the human body impedance measuring result are improved.
In one embodiment, after determining whether the first impedance value is within the preset effective impedance range, it may be determined whether the measurement state of the measured object is abnormal according to the determination result. Specifically, when the first impedance value is not within the effective impedance range, it is determined that the measurement state of the measured object is an abnormal state. The abnormal state comprises that the standing position of the tested object does not meet the standing condition or the contact state of the tested object and the electrode is in the abnormal state. Specifically, in normal impedance measurement activities of the human body, the feet of the measured object need to stand at a specific position of the weighing panel to ensure that the contact area between the feet and the electrodes is enough and consistent as much as possible, if the standing posture of the measured object does not meet the requirements, the difference between the contact areas of the feet and the electrodes is larger, or the contact area between a certain foot and the electrodes is smaller, so that the accuracy of the measurement result is affected. Therefore, in this embodiment, for the current electrode arrangement state, an effective impedance range is preset, and if the first impedance value measured by the first excitation signal is within the effective impedance range, it can be determined that the feet of the measured object have been standing at the specific position of the weighing panel, and meanwhile, the contact area between the feet of the measured object and the electrodes is sufficient and consistent. In this embodiment, the case where the standing position of the object to be measured does not satisfy the standing condition includes a case where at least one of the feet of the object to be measured does not stand at a specific position of the weighing panel, and the like, and the case where the contact state of the object to be measured and the electrode is in an abnormal state includes a case where the contact area of at least one of the feet of the object to be measured and the electrode is small, or shoes or socks are worn, and the like. When the standing position of the object to be measured does not satisfy the standing condition or the contact state with the electrode is in an abnormal state due to a certain situation, the first impedance value measured by the first excitation signal does not fall within the above effective impedance range. Therefore, the present embodiment can identify whether the measurement state of the user is normal by determining whether the first impedance value is in the effective impedance range. Alternatively, in the present embodiment, when the measurement signal is received, the abnormal state determination is started to be performed until the normal state is determined, and the subsequent body impedance measurement activity is restarted.
The method has the beneficial effects that whether the first impedance value is in the preset effective impedance range or not is judged, so that the measured state of the measured object is an abnormal state or a normal state is obtained, the human body impedance measuring method has a better error correction mechanism, and the occurrence of erroneous measurement conditions such as incapability of measuring, invalid measuring and the like is avoided.
In one embodiment, after determining that the measurement state of the object to be measured is an abnormal state, outputting first prompt information according to the abnormal state, where the first prompt information is used to prompt at least one of an abnormal standing position of the object to be measured and an abnormal contact state of the object to be measured and the electrode. Optionally, the first prompt information includes one or more of a text prompt, a light prompt and a prompt tone prompt; optionally, the first prompt message is output through one or more of a speaker, a display screen, an indicator light set, and a vibration motor of the body impedance measurement device or other devices communicatively connected to the device. According to the embodiment, the first prompt information is output in the abnormal state, so that the measured object can be reminded of timely adjusting the standing position or contacting with the electrode to the normal measurement state, and the measurement efficiency is improved.
In one embodiment, after determining that the measurement state of the measured object is an abnormal state, monitoring whether the measurement state of the measured object is continuously in the abnormal state within a preset adjustment time. If the measured state of the measured object is continuously in an abnormal state within the preset adjustment time, outputting second prompt information, wherein the second prompt information is used for prompting measurement errors. Optionally, the second prompt information includes one or more of a text prompt, a light prompt and a prompt tone prompt; optionally, the second prompt message is output through one or more of a speaker, a display screen, an indicator light set, and a vibration motor of the body impedance measurement device or of another device communicatively coupled to the device. In this embodiment, if the standing position of the measured object is adjusted within the preset adjustment time, so as to satisfy the standing condition, or the contact state of the two feet and the electrode is adjusted, so that the two feet and the electrode are in good contact, the first impedance value returns to the preset effective impedance range, and further the subsequent human body impedance measurement activity is started. According to the embodiment, the second prompt information is output when the measured object is continuously in the abnormal state, so that the measured object is timely informed of measurement errors, unnecessary long-time waiting is avoided, and meanwhile, the measured object can be reminded of timely adjusting the standing position or contacting with the electrode to be in the normal measurement state, so that the measurement efficiency is improved.
In one embodiment, the body impedance measurement method is applied to a body impedance measurement apparatus, a schematic diagram of which is shown in fig. 2. The body impedance measuring device has at least two electrodes: the electrodes 1 and 2 are arranged in parallel, when the measured object stands on the human body impedance measuring equipment, the standing positions of the two feet are adjusted, so that the two feet are respectively in good contact with the electrodes 1 and 2, and when the measured object stands on the human body impedance measuring equipment stably, the first excitation signal and the second excitation signal are conducted to the two feet of the measured object through the electrodes 1 and 2 in sequence, so that the abnormal state detection operation of the embodiment starts to be executed. Alternatively, when the electrodes 1 and 2 are transparent electrodes, an effective measurement range may be shown to the user around or within a coverage area of the electrodes 1 and 2 by silk screening or the like.
In one embodiment, the body impedance measurement method is applied to a body impedance measurement apparatus, and fig. 3 shows a schematic diagram of another body impedance measurement apparatus. The body impedance measuring device comprises a first electrode pair 10 and a second electrode pair 20, wherein the first electrode pair 10 comprises a first measuring electrode 11 and a first excitation electrode 12, and the second electrode pair 20 comprises a second measuring electrode 21 and a second excitation electrode 22. When the measured object stands on the human impedance measuring device, the standing position of the two feet is adjusted, so that one foot of the measured object is in good contact with the first measuring electrode 11 and the first exciting electrode 12, and the other foot of the measured object is in good contact with the second measuring electrode 21 and the second exciting electrode 22. When the subject stably stands on the human impedance measuring apparatus, the first excitation signal and the second excitation signal are respectively conducted to both feet of the subject through the first excitation electrode 12 of the first electrode pair 10 and the second excitation electrode 22 of the second electrode pair 20, thereby starting to perform the abnormal state detection operation of the present embodiment. Alternatively, when the first measuring electrode 11, the first exciting electrode 12, the second measuring electrode 21, and the second exciting electrode 22 are transparent electrodes, an effective measuring range may be shown to the user in the surroundings or coverage of the first measuring electrode 11, the first exciting electrode 12, the second measuring electrode 21, and the second exciting electrode 22 by silk screening or the like.
In this embodiment, the effective impedance range is determined according to the distance between the at least two electrodes.
Specifically, a first distance between the first measurement electrode 11 and the first excitation electrode 12 is acquired, and then an effective impedance range is determined according to the first distance; alternatively, a second distance between the second measuring electrode 21 and the second excitation electrode 22 is acquired, and then the effective impedance range is determined based on the second distance. Since the frequency of the first excitation signal used in the present embodiment is low, when the distance between the measurement electrode and the excitation electrode is short, parasitic capacitance effect between the measurement electrode and the excitation electrode can be avoided, and at this time, it can be determined whether the object to be measured is in an abnormal state by the impedance value. In order to accurately identify whether the object is in an abnormal state, the effective impedance range may be determined in advance according to the distance between the measuring electrode and the exciting electrode in the case that the frequency of the first exciting signal remains unchanged. Since the present embodiment is provided with the first measuring electrode 11 and the first exciting electrode 12, the second measuring electrode 21 and the second exciting electrode 22 at the same time, the effective impedance range can be determined by the above-described first distance or second distance.
Further, in order to obtain a more accurate effective impedance range, in this embodiment, the magnitude relation between the first distance and the second distance is determined, if the first distance is greater than the second distance, the effective impedance range is determined according to the second distance, and if the first distance is less than the second distance, the effective impedance range is determined according to the first distance, so that the effective impedance range is ensured to be in an optimal effective range, and the missing of the determination and identification of the abnormal state is avoided.
Optionally, the frequency of the second excitation signal is 50KHz, and the frequency of the first excitation signal is less than 30KHz. For example, the frequency of the first excitation signal may be 30KHz, 20KHz, 10KHz or 5KHz. Alternatively, when the distance between the measurement electrode and the excitation electrode is small, the frequency of the first excitation signal is further reduced, thereby improving the recognition rate of the abnormal state, and when the distance between the measurement electrode and the excitation electrode is large, the frequency of the first excitation signal may be appropriately increased.
Optionally, the present invention also proposes a body impedance measurement device comprising a memory, a processor and a computer program stored on said memory and executable on said processor, which when executed by said processor implements the steps of the body impedance measurement method as claimed in any one of the preceding claims.
Optionally, the present invention further proposes a computer readable storage medium, on which a body impedance measurement program is stored, which when executed by a processor implements the steps of the body impedance measurement method according to any one of the preceding claims.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (8)
1. A human body impedance measurement method, characterized in that the human body impedance measurement method is applied to a human body impedance measurement apparatus having at least two electrodes for conducting a first excitation signal and a second excitation signal to a measured object;
the method comprises the following steps:
measuring a first impedance value of the measured object according to the first excitation signal;
judging whether the first impedance value is in a preset effective impedance range or not;
when the first impedance value is in the effective impedance range, measuring a second impedance value of the measured object according to the second excitation signal, and determining a physiological parameter of the measured object according to the second impedance value;
wherein,
before judging whether the first impedance value is within the preset effective impedance range, the method further comprises:
determining the effective impedance range from a distance between at least two of the electrodes;
the frequency of the second excitation signal is 50KHz, and the frequency of the first excitation signal is less than 30KHz.
2. The method of claim 1, wherein after determining whether the first impedance value is within a predetermined effective impedance range, the method further comprises:
and when the first impedance value is not in the effective impedance range, determining that the measurement state of the measured object is an abnormal state.
3. The method of measuring impedance of a human body according to claim 2, wherein the measuring the first impedance value of the measured object according to the first excitation signal is: applying a first excitation signal to the tested object through an electrode, and measuring a first impedance value of the tested object under the action of the first excitation signal;
after the measurement state of the measured object is determined to be an abnormal state, the method further includes:
and outputting first prompt information according to the abnormal state, wherein the first prompt information is used for prompting at least one of abnormal standing position of the tested object and abnormal contact state of the tested object and the electrode.
4. The method according to claim 2, wherein after the determination that the measurement state of the measured object is an abnormal state, the method further comprises:
and if the measurement state of the measured object is continuously in the abnormal state within the preset adjustment time, outputting second prompt information, wherein the second prompt information is used for prompting measurement errors.
5. The method of claim 1, wherein the body impedance measurement device comprises a first electrode pair comprising a first measurement electrode and a first excitation electrode and a second electrode pair comprising a second measurement electrode and a second excitation electrode, the determining the effective impedance range based on a distance between at least two of the electrodes comprising:
determining the effective impedance range from a first distance between the first measurement electrode and the first excitation electrode; alternatively, the effective impedance range is determined from a second distance between the second measurement electrode and the second excitation electrode.
6. The method of claim 5, wherein said determining said effective impedance range based on a distance between at least two of said electrodes comprises:
determining the effective impedance range according to the second distance when the first distance is greater than the second distance;
and when the first distance is smaller than the second distance, determining the effective impedance range according to the first distance.
7. A body impedance measurement device, characterized in that the device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when being executed by the processor, realizes the steps of the body impedance measurement method according to any of claims 1 to 6.
8. A computer-readable storage medium, on which a body impedance measurement program is stored, which when executed by a processor, implements the steps of the body impedance measurement method according to any one of claims 1 to 6.
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| CA2707419A1 (en) * | 2007-08-09 | 2009-02-12 | Impedimed Limited | Impedance measurement process |
| US20180279903A1 (en) * | 2012-09-07 | 2018-10-04 | Respiratory Motion, Inc. | Spacing of electrodes for bioimpedance measurements |
| JP2019005323A (en) * | 2017-06-27 | 2019-01-17 | ルネサスエレクトロニクス株式会社 | Height measurement device, health care appliance and rotation gate |
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