阅读说明：本技术 一种人体阻抗测量方法、设备及计算机可读存储介质 (Human body impedance measuring method, device and computer readable storage medium ) 是由 尤杰 李晓 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种人体阻抗测量方法、设备及计算机可读存储介质。其中,该方法包括：根据第一激励信号测量被测对象的第一阻抗值；判断第一阻抗值是否处于预设的有效阻抗范围内；当第一阻抗值处于有效阻抗范围内时,根据第二激励信号测量被测对象的第二阻抗值,并根据第二阻抗值确定被测对象的生理参数；其中,第一激励信号的频率低于第二激励信号的频率。从而能够对测量过程中的异常状态进行更准确的识别,避免误判,提升了人体阻抗测量结果的准确性和可靠性。(The invention discloses a human body impedance measuring 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 within a preset effective impedance range or not; when the first impedance value is within 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. Therefore, the abnormal state in the measurement process can be more accurately identified, misjudgment is avoided, and the accuracy and reliability of the human body impedance measurement result are improved.)

1. A method of measuring impedance of a human body, the method comprising:

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 within the effective impedance range, measuring a second impedance value of the measured object according to a second excitation signal, and determining a physiological parameter of the measured object according to the second impedance value;

wherein a frequency of the first excitation signal is lower than a frequency of the second excitation signal.

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 human impedance measuring method of claim 2, wherein the measuring the first impedance value of the measured object according to the first excitation signal comprises: applying a first excitation signal to the measured object through an electrode, and measuring a first impedance value of the measured 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 comprises:

and outputting first prompt information according to the abnormal state, wherein the first prompt information is used for prompting at least one of the abnormal standing position of the measured object and the abnormal contact state of the measured object and the electrode.

4. The method for measuring human body impedance according to claim 2, wherein after determining that the measurement state of the object to be measured is an abnormal state, the method further comprises:

and if the measurement state of the object to be measured is continuously in the abnormal state within the preset adjustment time, outputting second prompt information, wherein the second prompt information is used for prompting a measurement error.

5. The human impedance measuring method of claim 1, wherein the human impedance measuring method is applied to a human impedance measuring apparatus having at least two electrodes for conducting the first excitation signal and the second excitation signal to the measured object;

before determining whether the first impedance value is within a preset effective impedance range, the method further includes:

determining the effective impedance range from a distance between at least two of the electrodes.

6. The body impedance measurement method of claim 5, 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, and wherein determining the effective impedance range from a distance between at least two of the electrodes comprises:

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.

7. The method of claim 6, wherein said determining said effective impedance range from a distance between at least two of said electrodes comprises:

when the first distance is greater than the second distance, determining the effective impedance range according to the second distance;

when the first distance is less than the second distance, determining the effective impedance range according to the first distance.

8. The method of measuring body impedance of any one of claims 1-7, wherein the frequency of the second excitation signal is 50KHz, and the frequency of the first excitation signal is less than 30 KHz.

9. 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 executed by the processor, carries out the steps of the body impedance measurement method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that a human body impedance measurement program is stored thereon, which when executed by a processor implements the steps of the human body impedance measurement method according to any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of electronic scales, in particular to a method and equipment for measuring human body impedance and a computer readable storage medium.

Background

In the existing body impedance measurement technology, it is required that both feet of the object to be measured are bare feet and make good contact with the electrodes, thereby facilitating the performance of body impedance measurement. When the two feet of the object are in contact with the electrodes, in order to acquire accurate electrode signals, the standing state or the electrode contact state of the object to be measured is generally determined by cross-driving and measuring the current excitation electrodes and the voltage measurement electrodes. However, when the distance between the two electrodes is relatively short, if a high frequency is used for measurement, signal coupling may be caused by parasitic capacitance between the two electrodes, so that the condition that the two feet of the object to be measured do not make good contact with the electrodes or the condition that the two feet wear shoes cannot be effectively identified. Particularly, the mainstream measurement frequency of the current human body composition analysis is 50KHz, and under the frequency, when the distance between the two electrodes is less than 15mm, the abnormal state cannot be effectively identified, so that the human body impedance may be mistakenly measured, and bad use experience is brought to a user.

Disclosure of Invention

In order to solve the technical defects in the prior art, the invention provides a human body impedance measuring method, which 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 within a preset effective impedance range or not;

when the first impedance value is within 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.

Optionally, after determining whether the first impedance value is within a preset effective impedance range, the method further includes:

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.

Optionally, the first impedance value of the measured object is measured according to the first excitation signal, and 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:

and outputting first prompt information according to the abnormal state, wherein the first prompt information is used for prompting at least one of the abnormal standing position of the measured object and the abnormal contact state of the measured object and the electrode.

Optionally, after determining that the measurement state of the measured object is an abnormal state, the method further includes:

and if the measurement state of the object to be measured is continuously in the abnormal state within the preset adjustment time, outputting second prompt information, wherein the second prompt information is used for prompting a measurement error.

Optionally, the human body impedance measuring method is applied to a human body impedance measuring device, which has at least two electrodes for conducting the first excitation signal and the second excitation signal to the measured object;

before determining whether the first impedance value is within the preset effective impedance range, the method further includes:

an effective impedance range is determined based on a distance between at least two electrodes.

Optionally, the body impedance measuring device comprises a first electrode pair comprising a first measuring electrode and a first stimulating electrode, and a second electrode pair comprising a second measuring electrode and a second stimulating electrode, the effective impedance range being determined from a distance between the 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 comprises:

and judging the magnitude relation between the first distance and the second distance, if the first distance is greater than the second distance, determining the effective impedance range according to the second distance, and if the first distance is less 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 30 KHz.

Optionally, the present invention also proposes a body impedance measuring device, which comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the body impedance measuring method as described in any one of the above.

Optionally, the present invention further proposes a computer readable storage medium having a human body impedance measurement program stored thereon, the human body impedance measurement program, when executed by a processor, implementing the steps of the human body impedance measurement method as described in any one of the above.

The invention 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 within a preset effective impedance range or not; when the first impedance value is within 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. Therefore, the abnormal state in the measurement process can be more accurately identified, misjudgment is avoided, and the accuracy and reliability of the human body impedance measurement 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 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 the body impedance measuring method according to an embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a flowchart of a human body impedance measurement method according to an embodiment of the present invention. In one embodiment, the present invention provides a method for measuring impedance of a human body, the method comprising:

s1, measuring a first impedance value of the measured object according to the 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 better understanding of the body weight measuring method of the present embodiment, please refer to fig. 2, and fig. 2 shows a schematic measurement diagram of the body impedance measuring method of the present embodiment implemented by the body impedance measuring apparatus. As shown in fig. 2, the body impedance measuring apparatus has a support panel, on which an electrode 1 and an electrode 2 are disposed, the electrode 1 and the electrode 2 being respectively used for contacting the sole of a measured object. In the normal measurement activity, the two feet of the object to be measured are in a barefoot state and are in good contact with the electrode 1 and the electrode 2 respectively, and in the process, the human body impedance value of the object to be measured can be measured through a conventional excitation signal. However, when the distance between the electrode 1 and the electrode 2 is relatively close and a conventional excitation signal is used for measurement, because the frequency of the excitation signal is high, signal coupling may be caused by parasitic capacitance between the electrode 1 and the electrode 2, so that an impedance value within a normal human body impedance value range can still be detected under the condition that the feet of the object to be measured are not in good contact with the electrodes or the shoes are worn by the feet. In order to solve the above technical problems, the inventor has found, through long-term research and practice, that a lower frequency excitation signal can reduce or even avoid signal coupling caused by parasitic capacitance between two electrodes, and therefore, in this embodiment, the low and high frequency excitation signals are successively used to measure the impedance value of the human body, the impedance measurement is performed through the lower frequency excitation signal to determine whether the human body is in an abnormal measurement state, and when the normal measurement state is confirmed, the human body impedance value of the measured object is measured through the higher frequency excitation signal.

As an implementation manner, firstly, a preset effective impedance range is obtained, and the effective impedance range is used for judging whether the 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 within 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 two feet of the object to be measured are not completely on the scale; or the distance between the two 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 an experimenter in a normal measurement state and according to 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 cannot fall into the effective human body impedance range due to signal coupling, and therefore misjudgment of the measurement state cannot be caused.

Further, when the first impedance value is not within the preset effective impedance range, it is determined that the current measurement state does not satisfy the normal measurement condition, and no further 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 object to be measured satisfies the normal measurement condition, a second excitation signal with a higher frequency is further used to measure a second impedance value of the object to be measured, and the physiological parameter of the object to be measured is determined according to the second impedance value.

In this embodiment, the measuring a first impedance value of the measured object according to the first excitation signal specifically includes: 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; and 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 embodiment has the advantages that impedance measurement is firstly carried out through the low-frequency excitation signal to judge whether the measurement state is abnormal, and when the measurement state is confirmed to be normal, the human body impedance value of the measured object is measured through the high-frequency excitation signal. Therefore, the abnormal state in the measurement process can be more accurately identified, misjudgment is avoided, and the accuracy and reliability of the human body impedance measurement 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, the measurement state of the measured object is determined to be an abnormal state. The abnormal state includes that the standing position of the object to be measured does not satisfy the standing condition, or the contact state of the object to be measured and the electrode is in an abnormal state. Specifically, during normal human body impedance measurement activities, the two feet of the object to be measured need to stand at specific positions of the weighing panel to ensure that the contact areas of the two feet and the electrodes are sufficient and consistent as much as possible, and if the standing posture of the object to be measured does not meet the requirements, the difference between the contact areas of the two feet and the electrodes is large, or the contact area of one foot and the electrodes is small, so that the accuracy of the measurement result is affected. Therefore, in the present embodiment, an effective impedance range is preset for the current electrode arrangement state, and if the first impedance value measured by the first excitation signal is within the effective impedance range, it can be determined that the two feet of the object to be measured stand at the specific position of the weighing panel, and meanwhile, the contact areas of the two feet of the object to be measured and the electrodes are 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 both 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 the abnormal state includes a case where the contact area of at least one of the both feet of the object to be measured and the electrode is small, or a case where a shoe or a sock is worn, and the like. When the standing position of the object to be measured does not satisfy the standing condition due to a certain situation or the contact state with the electrode is in an abnormal state, the first impedance value measured by the first excitation signal does not fall within the 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 this 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 human body impedance measurement activity is started again.

The method for measuring the human body impedance has the advantages that whether the first impedance value is in the preset effective impedance range or not is judged, and then the measured state of the measured object is in an abnormal state or a normal state, so that the method for measuring the human body impedance has a better error correction mechanism, and the occurrence of the situations of error measurement such as incapability of measurement, invalid measurement and the like is avoided.

In one embodiment, after determining that the measurement state of the measured object is an abnormal state, first prompt information is output according to the abnormal state, wherein the first prompt information is used for prompting at least one of the abnormality of the standing position of the measured object and the abnormality of the contact state of the measured object and the electrode. Optionally, the first prompt message includes one or more of a text prompt, a light prompt and a prompt sound prompt; optionally, the first prompt message is output via one or more of a speaker, a display screen, a set of indicator lights, and a vibration motor of the body impedance measurement device or another device communicatively coupled to the device. In the embodiment, the first prompt information is output in the abnormal state, so that the measured object can be reminded to adjust the standing position in time or contact 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 object to be measured is an abnormal state, monitoring whether the measurement state of the object to be measured is continuously in the abnormal state within a preset adjustment time. And if the measurement state of the object to be measured is continuously in the abnormal state within the preset adjustment time, outputting second prompt information, wherein the second prompt information is used for prompting a measurement error. Optionally, the second prompt message includes one or more of a text prompt, a light prompt and a prompt sound prompt; optionally, the second prompting message is output through one or more of a speaker, a display screen, a set of indicator lights, and a vibrating motor of the body impedance measuring device or the other device communicatively coupled to the device. In this embodiment, if the standing position of the object to be measured is adjusted within the preset adjustment time, so as to satisfy the standing condition, or the contact state between 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 the subsequent human body impedance measurement activity is started. The embodiment timely informs the measured object of measurement errors by outputting the second prompt information when the measured object is continuously in the abnormal state, avoids unnecessary long-time waiting, and simultaneously can remind the measured object of timely adjusting the standing position or the contact with the electrode to the normal measurement state so as to improve the measurement efficiency.

In one embodiment, the body impedance measurement method is applied to a body impedance measurement device, and fig. 2 shows a schematic diagram of the body impedance measurement device. The body impedance measuring device has at least two electrodes: the electrode 1 and the electrode 2, the electrode 1 and the electrode 2 are distributed in parallel, when the measured object stands on the human body impedance measuring device, the standing positions of the two feet are adjusted, so that the two feet are respectively in good contact with the electrode 1 and the electrode 2, when the measured object stably stands on the human body impedance measuring device, the first excitation signal and the second excitation signal are sequentially conducted to the two feet of the measured object through the electrode 1 and the electrode 2, and the abnormal state detection operation of the embodiment is started to be executed. Alternatively, when the electrodes 1 and 2 are transparent electrodes, the effective measurement range may be shown to the user in the surrounding or coverage area of the electrodes 1 and 2 by silk-screen printing or the like.

In one embodiment, the body impedance measurement method is applied to a body impedance measurement device, and fig. 3 shows a schematic diagram of another body impedance measurement device. The body impedance measuring apparatus includes a first electrode pair 10 and a second electrode pair 20, wherein the first electrode pair 10 includes a first measuring electrode 11 and a first exciting electrode 12, and the second electrode pair 20 includes a second measuring electrode 21 and a second exciting electrode 22. When the measured object stands on the human body impedance measuring device, the standing positions of the two feet are 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 stands stably on the body impedance measuring apparatus, the first and second excitation signals are conducted to both feet of the subject through the first and second excitation electrodes 12 and 22 of the first and second electrode pairs 10 and 20, respectively, thereby starting to perform the abnormal state detecting operation of the present embodiment. Alternatively, when the first measuring electrode 11, the first excitation electrode 12, the second measuring electrode 21, and the second excitation electrode 22 are transparent electrodes, an effective measuring range may be shown to a user in a surrounding or covering range of the first measuring electrode 11, the first excitation electrode 12, the second measuring electrode 21, and the second excitation electrode 22 by silk-screen printing 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 obtained, 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 from the second distance. It should be noted that, because the frequency of the first excitation signal adopted in the present embodiment is low, when the distance between the measurement electrode and the excitation electrode is short, the parasitic capacitance effect generated between the measurement electrode and the excitation electrode can also be avoided, and at this time, whether the measured object is in an abnormal state can be determined through 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 measurement electrode and the excitation electrode while the frequency of the first excitation signal is kept unchanged. Since the present embodiment is provided with the first measuring electrode 11 and the first excitation electrode 12, and the second measuring electrode 21 and the second excitation electrode 22 at the same time, the effective impedance range can be determined by the first distance or the second distance described above.

Further, in order to obtain a more accurate effective impedance range, in this embodiment, a magnitude relationship 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 omission of determination and identification of an 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 30 KHz. For example, the frequency of the first excitation signal may be 30KHz, 20KHz, 10KHz, or 5 KHz. 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 measuring device, which comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the body impedance measuring method as described in any one of the above.

Optionally, the present invention further proposes a computer readable storage medium having a human body impedance measurement program stored thereon, the human body impedance measurement program, when executed by a processor, implementing the steps of the human body impedance measurement method as described in any one of the above.

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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.