CN108937933B - Skin detector, metal probe of skin detector and skin moisture calculating method - Google Patents
Skin detector, metal probe of skin detector and skin moisture calculating method Download PDFInfo
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- CN108937933B CN108937933B CN201810934361.1A CN201810934361A CN108937933B CN 108937933 B CN108937933 B CN 108937933B CN 201810934361 A CN201810934361 A CN 201810934361A CN 108937933 B CN108937933 B CN 108937933B
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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
- A61B5/05—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
- A61B5/0531—Measuring skin impedance
Abstract
The application discloses a skin detector and a metal probe thereof, comprising two metal sub-probes for measuring skin voltage under preset current, wherein the metal sub-probes comprise a line contact part or a surface contact part for contacting with skin. In the application, the contact part of the metal sub-probe and the skin is linear or planar, so that the area of the contact part with the skin is larger, the acquired data is more accurate, the acquisition is not needed for a plurality of times, the process is simple, the real-time performance is good, and the effective balance of the data reliability and the real-time performance is realized. The application also discloses a skin moisture calculating method which has the beneficial effects.
Description
Technical Field
The application relates to the field of skin detection, in particular to a skin detector, a metal probe thereof and a skin moisture calculating method.
Background
The detection principle of the skin detector is skin bioimpedance principle, and the core of the skin detector is the specific corresponding relation between the skin impedance of the human body and the moisture of the skin of the human body. Specifically, the metal probe of the skin detector is contacted with skin, and then a minute current is applied to the metal probe, and the minute current flows through the skin to form a loop. The skin voltage can be obtained through the metal probe, and the skin moisture value can be obtained according to the skin voltage and the corresponding relation. The skin detector in the market at present adopts the design of rod-shaped metal probe generally, namely mainly uses the contact point type, because the contact area of this kind of point contact type metal probe and skin is comparatively little, the skin voltage of gathering is unstable, consequently, in order to ensure that the skin moisture who obtains finally is reliable, need do many times and measure the average value on the skin, the process is loaded down with trivial details, and measuring time is long, can not accomplish effective balance of data reliability and instantaneity.
Disclosure of Invention
The application aims to provide a skin detector, a metal probe and a skin moisture calculating method thereof, which have the advantages of accurate acquired data, no need of acquisition for a plurality of times, simple process and good instantaneity, and achieve effective balance of data reliability and instantaneity.
In order to solve the technical problem, the application provides a metal probe of a skin detector, which comprises two metal sub-probes for measuring skin voltage under preset current, wherein the metal sub-probes comprise a line contact part or a surface contact part for contacting with skin.
Preferably, the two metal sub-probes are spaced apart by a predetermined distance.
Preferably, the surface contact part of the metal sub-probe is semi-circular.
Preferably, the concave surfaces of the two semicircular metal sub-probes are arranged opposite to each other.
In order to solve the technical problem, the application also provides a skin detector, which comprises the metal probe as described in any one of the above, and further comprises:
the power supply module is connected with the metal probe;
the analog-to-digital converter is connected with the metal probe and used for converting the skin voltage from analog quantity to digital quantity;
and the processor is respectively connected with the power supply module, the analog-to-digital converter and the power supply module, and is used for controlling the power supply module to output the preset current and also used for obtaining a skin moisture value according to the corresponding relation of the preset current, the digital skin voltage and the impedance moisture.
Preferably, the processor is specifically a processor for obtaining skin impedance according to the preset current and the voltage of the digital quantity, and obtaining a skin moisture value according to the skin impedance and an impedance moisture conversion relation;
wherein the impedance-moisture conversion relation is x= |z|t| r, x is the skin moisture, z|is the skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient,x 1 、x 2 …x n for the water sample data obtained according to the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage acquired by the reference skin detector, n is the number of moisture sample data.
Preferably, the processor is specifically a processor for obtaining skin impedance according to a preset current and a voltage of a digital quantity, and obtaining a skin moisture value according to the skin impedance and an impedance moisture conversion relation;
wherein, the impedance-moisture conversion relation is x= |z|r-offset, x is the skin moisture, z|is the skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient, and offset is an offset correction coefficient of the skin detector compared with a reference skin detector;x 1 、x 2 …x n for the water sample data obtained according to the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage collected by the reference skin detector, n is the number of moisture sample data, < >>
Preferably, the skin detector further comprises:
the input end is connected with the metal probe, and the output end is connected with the filtering module of the analog-to-digital converter and is used for filtering the skin voltage.
Preferably, the method further comprises:
the spectrum module is arranged between the two semicircular metal sub-probes and is used for detecting skin state information, and the skin state information comprises fat state information.
In order to solve the above technical problem, the present application further provides a skin moisture calculating method, which is applied to the processor described above, and includes:
acquiring skin voltage under preset current;
and obtaining a skin moisture value according to the corresponding relation of the preset current, the digital skin voltage and the impedance moisture.
Preferably, the obtaining the skin moisture value according to the preset correspondence between the current, the skin voltage and the impedance moisture includes:
obtaining skin impedance according to the preset current and the skin voltage, and obtaining a skin moisture value according to the skin impedance and the impedance moisture conversion relation;
wherein the impedance-moisture conversion relation is x= |z|t| r, x is the skin moisture, z|is the skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient,x 1 、x 2 …x n for the water sample data obtained according to the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage acquired by the reference skin detector, n is the number of moisture sample data.
Preferably, the obtaining the skin moisture value according to the preset correspondence between the current, the skin voltage and the impedance moisture includes:
a processor for obtaining skin impedance according to skin voltage of preset current and digital quantity and obtaining skin moisture value according to the skin impedance and impedance moisture conversion relation;
wherein, the impedance-moisture conversion relation is x= |z|r-offset, x is the skin moisture, z|is the skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient, and offset is an offset correction coefficient of the skin detector compared with a reference skin detector;x 1 、x 2 …x n for the water sample data obtained according to the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage collected by the reference skin detector, n is the number of moisture sample data, < >>
The application provides a skin detector, a metal probe and a skin moisture calculating method thereof. In the application, the contact part of the metal sub-probe and the skin is linear or planar, so that the area of the contact part with the skin is larger, the acquired data is more accurate, the acquisition is not needed for a plurality of times, the process is simple, the real-time performance is good, and the effective balance of the data reliability and the real-time performance is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a metal probe of a local skin detector according to the present application;
fig. 2 is a schematic structural diagram of a skin detector according to the present application;
FIG. 3 is a graph showing the data distribution of a prototype skin detector and a reference skin detector according to the present application;
fig. 4 is a process flow diagram of a skin moisture calculation method provided by the application.
Detailed Description
The core of the application is to provide the skin detector, the metal probe and the skin moisture calculating method thereof, the acquired data is more accurate, the acquisition is not needed for a plurality of times, the process is simple, the instantaneity is good, and the effective balance of the data reliability and the instantaneity is achieved.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a metal probe of a local skin detector according to the present application, the skin detector includes two metal sub-probes 11 for measuring skin voltage at a preset current, and the metal sub-probes 11 include a line contact portion or a surface contact portion for contacting with skin.
It should be noted that fig. 1 provided in this embodiment is an example of a contact portion included in the metal sub-probe 11 as a surface contact portion.
The design thought of the metal probe is as follows: since the skin impedance of the human body has a specific correspondence with the skin moisture of the human body, the skin impedance of the human body can be obtained first in order to obtain the skin moisture of the human body, and the voltage and the skin current corresponding to the skin of the human body can be obtained first in order to obtain the skin impedance of the human body. After a preset current is applied to the skin of a human body through the metal sub-probes 11, a loop is formed between the two metal sub-probes 11 and the skin between the metal sub-probes 11, so that the skin voltage at the preset current is obtained according to the two metal sub-probes 11.
In order to make the acquired data of the skin voltage more accurate, the present application requires that the contact portion of the metal sub-probe 11 with the skin be a surface contact portion or a line contact portion when the metal sub-probe 11 is designed, and in particular, when the contact portion is a surface contact portion, the shape of the surface may be a semicircular ring shape (as shown in fig. 1) or a rectangular shape, and the present application is not particularly limited to the shape of the surface. When the contact is a wire contact, the wire is of a certain length, and the specific length can be determined according to experiments or experience; the line may be a straight line or a curved line, depending on the actual situation. The relative position between the two metal sub-probes 11 is not particularly limited on the basis of no contact of the two metal sub-probes 11, for example, when the contact part is a semicircular surface contact part, concave surfaces of the two metal sub-probes 11 can be oppositely arranged (as shown in fig. 1); when the contact is a line contact, the two metal sub-probes 11 may be arranged in parallel.
Compared with the contact type metal sub-probe in the prior art, the metal sub-probe 11 in the application is linear or planar, and the area of the linear metal sub-probe or the planar metal sub-probe is larger than that of the point-shaped metal sub-probe. Based on the above, when the metal probe is adopted for data acquisition, the acquired data can be accurate, the acquisition is not required to be carried out for a plurality of times, the process is simple, the real-time performance is good, and the effective balance of the data reliability and the real-time performance is achieved.
Based on the above embodiments:
as a preferred embodiment, two metal sub-probes 11 are spaced apart by a preset distance.
It will be appreciated that the two metal sub-probes 11 need to collect the skin voltage between them, which is formed by the preset current on the skin, and if the distance between the two metal sub-probes 11 is small, there may be a possibility that electromagnetic influence or even a short circuit may exist between the two metal sub-probes 11, and if the distance between the two metal sub-probes 11 is large, the skin length through which the preset current flows will also be long, and the skin moisture state of different areas may also be greatly different, which may cause the collected skin voltage to not accurately reflect the skin moisture state. Based on this, in the present application, a preset distance is set between the two metal sub-probes 11, and the preset distance is required to be greater than a first preset value and less than a second preset value, where the first preset value is less than the second preset value, and the first preset value and the second preset value may be obtained according to multiple tests or may be obtained according to an empirical value. By the mode, the distance between the two metal sub-probes 11 is in a reasonable range, mutual electromagnetic influence between the two metal sub-probes 11 is reduced, and accuracy of skin voltage acquisition is guaranteed.
As a preferred embodiment, the surface contact portion of the metal sub-probe 11 is semi-circular.
Specifically, under the large background that the skin detector is miniaturized and attractive, the metal probe 1 is not particularly large, and under the comprehensive balance of area and attractive, the surface contact part of the metal sub-probe 11 can be designed into a semicircular shape, so that on one hand, the semicircular shape is attractive, the user experience is improved, and on the other hand, the semicircular shape can keep a larger area.
As a preferred embodiment, the concave surfaces of the two semi-circular metal sub-probes 11 are disposed opposite to each other.
The concave surfaces of the two semi-circular metal sub-probes 11 are arranged opposite to each other, as shown in fig. 1, and on one hand, the arrangement mode can maximally reduce the occupation of the area of the skin detector, and on the other hand, an idle area exists between the two semi-circular rings, and other skin test elements can be arranged in the area, for example, a spectrum module for detecting fat state information can be arranged.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a skin detector according to the present application, where the skin detector includes a metal probe 1 as in the above embodiment, and further includes:
a power module 2 connected with the metal probe 1;
an analog-to-digital converter 3 connected to the metal probe 1 for converting the skin voltage from an analog quantity to a digital quantity;
the processor 4 is respectively connected with the power module 2, the analog-to-digital converter 3 and the power module 2, and is used for controlling the power module 2 to output a preset current and also used for obtaining a skin moisture value according to the corresponding relation of the preset current, the skin voltage of the digital quantity and the impedance moisture.
Specifically, the application also provides a skin detector, which comprises the metal probe 1 in the embodiment, an analog-to-digital converter 3 and a processor 4. When the skin moisture sensor works, the processor 4 controls the power module 2 to output preset current through the metal probe 1 after receiving a user instruction so as to form voltage on skin, the analog-to-digital converter 3 converts the skin voltage from analog quantity to digital quantity after detecting the skin voltage under the preset current, and the processor 4 obtains the skin moisture value according to the corresponding relation among the preset current, the skin voltage of the digital quantity and the preset impedance moisture after receiving the skin voltage of the digital quantity. The skin moisture values in the different ranges correspond to different skin conditions, where the skin conditions may include dry, proper, wet, etc., and the present application is not particularly limited herein.
In practical application, the two metal sub-probes 11 can be attached to the skin detector and can be connected with the skin detector through a connecting piece. The processor 4 may be a single-chip microcomputer or the like, and the present application is not particularly limited herein. The power module 2 also supplies power to the processor 4, and the power module 2 may be a voltage module or the like.
The application adopts the metal sub-probe 11 with the contact part being a surface contact part or a line contact part to collect skin voltage, and because the area of the contact part between the metal sub-probe 11 and the skin is relatively large, the collected data is relatively accurate, the collection is not needed to be repeated, the process is simple, the real-time performance is good, and the effective balance of the data reliability and the real-time performance is realized.
As a preferred embodiment, the skin detector further comprises a prompting device for prompting skin moisture.
The prompting device can be a display screen and/or a voice broadcasting device, and the prompting device is determined according to actual conditions.
As a preferred embodiment, the processor 4 is specifically configured to obtain skin impedance according to a preset current and a voltage of a digital value, and obtain a skin moisture value according to a skin impedance and an impedance moisture conversion relation;
wherein, the impedance moisture conversion relation is x= |Z|T| r, x is skin moisture, |Z| is skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient,x 1 、x 2 …x n for the water sample data obtained from the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage acquired by the reference skin detector, n is the number of moisture sample data.
Existing technologyThe impedance-moisture conversion relation adopted in the technology is x= |z|t, wherein|z| is skin impedance,wherein R is the equivalent resistance of the skin, < + >>The skin impedance is obtained by directly acquiring skin voltage and preset current through the metal probe 1, and then the skin moisture value is obtained according to the skin impedance and the preset resistance conversion coefficient.
In order to realize anti-interference, an anti-interference algorithm such as a limiting filtering method, an arithmetic average filtering method and the like can be adopted, but the method must be used for continuously reading N skin moisture to perform corresponding limiting filtering recalculation or directly calculating the arithmetic average value of the skin moisture.
In order to solve the technical problems, the application introduces a fitting correction coefficient into the impedance-moisture conversion relation, and the fitting correction coefficient is proposed to reduce the deviation between a prototype skin detector and a professional reference skin detector.
Specifically, it is assumed that the data (skin moisture, skin impedance, skin voltage) obtained from the professional reference skin detector is x 1 、x 2 …x n According to the data obtained by the skin detector of the prototype, y is 1 、y 2 …y n The co-variation coefficients of the two groups of samples are:
the standard deviation of the samples is:
fitting correction coefficients
According to the embodiment, the corresponding relation between the prototype skin detector and the reference skin detector is embodied through fitting the correction coefficient, the final impedance moisture conversion relation is x= |Z|T|r, N values are not required to be continuously read for filtering through fitting the correction coefficient, comparison with the skin detection standard formulated according to the reference skin detector is facilitated, and the real-time performance of skin moisture detection is improved on the basis of guaranteeing the test precision.
As a preferred embodiment, the processor 4 is specifically configured to obtain skin impedance according to a preset current and a voltage of a digital value, and obtain a skin moisture value according to a skin impedance and an impedance moisture conversion relation;
wherein, the impedance-moisture conversion relation is x= |Z|T|r-offset, x is skin moisture, z|is skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient, and offset is an offset correction coefficient of the skin detector compared with a reference skin detector;x 1 、x 2 …x n for the water sample data obtained from the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage collected by the reference skin detector, n is the number of moisture sample data, < >>
Specifically, in order to further reduce the deviation between the skin detector of the prototype and the reference skin detector, the application introduces the offset correction coefficient of the skin detector compared with the reference skin detector on the basis of introducing the fitting correction coefficient, and referring to fig. 3, fig. 3 is a data distribution diagram of the skin detector of the prototype and the reference skin detector. It can be seen that although the trend of the prototype skin detector is substantially the same as that of the reference skin detector, there is also an offset between the two.
In order to solve the technical problems, the application introduces the offset correction coefficient of the skin detector compared with the reference skin detector,the measured data can be more close to the data measured by the reference skin detector through the offset correction coefficient, so that the data is favorable for comparison with the skin detection standard formulated according to the reference skin detector, and the detection accuracy of the skin detector of the prototype is further improved.
As a preferred embodiment, the skin detector further comprises:
the input end is connected with the metal probe 1, and the output end is connected with the filtering module of the analog-to-digital converter 3 and is used for filtering the skin voltage.
In order to further improve the detection accuracy of the skin detector, a filtering module is further arranged between the analog-to-digital converter 3 and the metal probe 1 and is used for filtering the skin voltage acquired by the metal probe 1. The application does not limit the specific structure of the filtering module, and the filtering module is determined according to the actual situation.
As a preferred embodiment, further comprising:
the spectrum module is arranged between the two semicircular metal sub-probes 11 and is used for detecting skin state information, and the skin state information comprises fat state information.
In order to improve the function of the skin detector and maintain the beauty of the skin detector, the present embodiment sets a spectrum module for detecting skin state information between two semi-circular metal sub-probes 11, and can detect skin state information including fat state information without increasing the area of the skin detector, where the spectrum module is specifically but not limited to an infrared spectrum module.
In one embodiment, two metal sub-probes 11 may be inserted into the spectroscopic module through two outward derivative projections, and connected to the analog-to-digital converter 3 through the spectroscopic module.
Referring to fig. 4, fig. 4 is a process flow chart of a skin moisture calculating method according to the present application, which is applied to the above-mentioned processor, and includes:
s11: acquiring skin voltage under preset current;
s12: and obtaining a skin moisture value according to the corresponding relation of the preset current, the skin voltage of the digital quantity and the impedance moisture.
As a preferred embodiment, obtaining the skin moisture value according to the preset current, skin voltage and impedance moisture correspondence relation includes:
obtaining skin impedance according to preset current and skin voltage, and obtaining a skin moisture value according to skin impedance and an impedance moisture conversion relation;
wherein, the impedance moisture conversion relation is x= (|Z|) T| r, x is skin moisture, |Z| is skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient,x 1 、x 2 …x n for the water sample data obtained from the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage acquired by the reference skin detector, n is the number of moisture sample data.
As a preferred embodiment, obtaining the skin moisture value according to the preset current, skin voltage and impedance moisture correspondence relation includes:
a processor for obtaining skin impedance according to the skin voltage of the preset current and the digital quantity and obtaining skin moisture value according to the skin impedance and the impedance moisture conversion relation;
wherein, the impedance moisture conversion relation is x= (|Z|) T r-offset, x is skin moisture, |Z| is skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient, and offset is an offset correction coefficient of the skin detector compared with a reference skin detector;x 1 、x 2 …x n for the water sample data obtained from the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage collected by the reference skin detector, n is the number of moisture sample data, < >>
For the description of the skin moisture calculating method provided by the present application, refer to the above embodiments, and the description of the present application is omitted herein.
It should be noted that in this specification 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 previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A skin detector comprising a metal probe, further comprising:
the power supply module is connected with the metal probe;
the analog-to-digital converter is connected with the metal probe and used for converting skin voltage from analog quantity to digital quantity;
the processor is respectively connected with the power supply module, the analog-to-digital converter and the power supply module, and is used for controlling the power supply module to output preset current and also used for obtaining a skin moisture value according to the corresponding relation of the preset current, the skin voltage of the digital quantity and the impedance moisture;
the processor is specifically a processor for obtaining skin impedance according to the preset current and the skin voltage of the digital quantity and obtaining a skin moisture value according to the skin impedance and the impedance moisture conversion relation;
wherein the impedance-moisture conversion relation is x= |z|t| r, x is the skin moisture, z|is the skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient,x 1 、x 2 …x n for the water sample data obtained according to the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage acquired by the reference skin detector, n is the number of moisture sample data.
2. The skin detector according to claim 1, wherein the processor is specifically a processor for obtaining skin impedance according to a skin voltage of a preset current and a digital value, and obtaining a skin moisture value according to the skin impedance and an impedance moisture conversion relation;
wherein the impedance-moisture conversion relation is x= |z|r-offset, x is the skin moisture, z|is the skin impedance, and T is a preset resistance conversion coefficientR is a fitting correction coefficient, and offset is an offset correction coefficient of the skin detector compared with a reference skin detector;x 1 、x 2 …x n for the water sample data obtained according to the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage collected by the reference skin detector, n is the number of moisture sample data, < >>
3. The skin detector of claim 1, wherein the skin detector further comprises:
the input end is connected with the metal probe, and the output end is connected with the filtering module of the analog-to-digital converter and is used for filtering the skin voltage.
4. A skin detector according to any one of claims 1-3, further comprising:
the spectrum module is arranged between the two semicircular metal sub-probes and is used for detecting skin state information, and the skin state information comprises fat state information.
5. A method of skin moisture calculation, for use in a processor according to any one of claims 1 to 4, comprising:
acquiring skin voltage under preset current;
obtaining a skin moisture value according to the corresponding relation of the preset current, the digital skin voltage and the impedance moisture;
the obtaining the skin moisture value according to the corresponding relation of the preset current, the skin voltage and the impedance moisture comprises the following steps:
obtaining skin impedance according to the preset current and the skin voltage, and obtaining a skin moisture value according to the skin impedance and the impedance moisture conversion relation;
wherein the impedance-moisture conversion relation is x= |z|t| r, x is the skin moisture, z|is the skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient,x 1 、x 2 …x n for the water sample data obtained according to the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage acquired by the reference skin detector, n is the number of moisture sample data.
6. The method of calculating skin moisture according to claim 5, wherein the obtaining the skin moisture value according to the preset current, skin voltage and impedance moisture correspondence relation comprises:
a processor for obtaining skin impedance according to skin voltage of preset current and digital quantity and obtaining skin moisture value according to the skin impedance and impedance moisture conversion relation;
wherein, the impedance-moisture conversion relation is x= |z|r-offset, x is the skin moisture, z|is the skin impedance, T is a preset resistance conversion coefficient, r is a fitting correction coefficient, and offset is an offset correction coefficient of the skin detector compared with a reference skin detector;x 1 、x 2 …x n for the water sample data obtained according to the skin voltage acquired by the skin detector, y 1 、y 2 …y n For the moisture sample data obtained from the skin voltage collected by the reference skin detector, n is the number of moisture sample data, < >>
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