CN109171662A - The detector of moisture content of skin and the detection method of moisture content of skin - Google Patents
The detector of moisture content of skin and the detection method of moisture content of skin Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 claims description 23
- 230000035515 penetration Effects 0.000 claims description 9
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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
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0075—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy
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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
- A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
- A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis
- A61B5/443—Evaluating skin constituents, e.g. elastin, melanin, water
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Abstract
The present invention relates to the detection methods of the detector and moisture content of skin of the technical field of moisture content of skin detection more particularly to a kind of moisture content of skin.The detector, including light source module and photosensitive detecting module, data processing module is connected on photosensitive detecting module, detector further includes the standard reference plate being movably arranged on detector, photosensitive detecting module is able to detect detection light in the reflected light of standard reference plate and obtains standard spectrum signal, and photosensitive detecting module can also detect detection light reflected light on the skin and obtain detection spectral signal, data processing module can obtain the water content of skin according to the difference of detection spectral signal and standard spectrum signal.The detector efficiently solves the problems, such as that prior art error is big.
Description
Technical field
The present invention relates to the technical field of moisture content of skin detection more particularly to the detectors and skin of a kind of moisture content of skin
The detection method of skin water content.
Background technique
In skin, water content accounts for about the 18%-20% of its weight.Water content in skin be maintain skin softness and
One of most important factor of elasticity.The missing of moisture of skin will cause that epidermis metabolism is excessively slow, accelerate the aging of skin.In recent years
Come, the raising with people to health and U.S. demand, in order to improve moisture of skin and realize skin moisturization, moisture content of skin
Fast accurate judgement become a very important job.
The common measurement method of moisture content of skin includes capacitance method and Bioelectrical impedance analysis at present.Capacitance method is to be based on
Water dielectric constant with higher, the variation by using capacitor measurement skin pricktest capacitance reflect the aqueous of skin indirectly
Amount.A kind of body local moisture of skin detection system proposed such as Patent No. 201320238940.5.Bioelectrical impedance analysis
Method is to input a small current or voltage signal to skin by being placed in the electrode of body surface, detects corresponding resistance resistance
Change, calculates the water content of skin.A kind of skin moisture measuring method proposed such as Patent No. 200510011875.2.However,
Installation cost height based on capacitance method and structure is complicated, the device measurement error based on electrical bio-impedance is larger；In addition, base
It is typically necessary in the system and device of both methods and is directly contacted with skin, skin can be had an impact.
It is had begun in existing technology using near-infrared spectrum technique and measures the moisture of skin, as notification number is
" US6529767B1 ", entitled " Method and apparatus for measuring skin moisture by
The patent document of using near infrared reflectance spectroscopy ", the program are based on near-infrared
The moisture of skin measurement that spectral technique carries out, the program are as follows: the water content of multiple sample skins is detected using the prior art, so
The spectrum of sample skin is recorded afterwards, establishes near-infrared reflection by setting multiple regression calibration set and with reference to moisture value
The standard calibration equation of spectrum simultaneously stores, to be carried out radiating skin to be measured with NIR FT Raman spectra, by spectroscopic data band
Enter standard calibration equation above-mentioned, obtains corresponding water content.
Above-mentioned measurement has certain defect: this method analyzes full spectral band, wherein being doped with many useless
The analysis of spectrum, and need to split the spectrum into forecast set and verifying collection after pre-processing, and multiple linear regression modeling is carried out with this,
Establish standard calibration equation, should during need using a large amount of spectroscopic data, process is complicated and time-consuming, at the same its use it is existing
Technological means detect sample skin, selection which kind of measurement method and the water content of selected sample skin in the prior art
Range on linear regression modeling influence it is huge, it is subjective, and when the real-time measurement of light environmental factor easily to reality
Data have an adverse effect, and institute's measured data be easy by skin other materials interference, the measurement knot obtained by above-mentioned reason
Fruit error is larger.
Summary of the invention
The present invention provides a kind of detector of moisture content of skin, is missed with solving detection water content existing for existing detection technique
The big problem of difference；A kind of detection method of moisture content of skin is provided simultaneously.
A kind of detector of moisture content of skin, including the light source module and photosensitive detecting module for issuing detection light,
Data processing module is connected on the photosensitive detecting module, the detector further includes being movably arranged on the detector
Standard reference plate, the photosensitive detecting module are able to detect the detection light in the reflected light of standard reference plate and obtain standard light
Spectrum signal, and the photosensitive detecting module can also detect detection light reflected light on the skin and obtain detection spectrum letter
Number, the data processing module can obtain skin according to the difference of the detection spectral signal and the standard spectrum signal
Water content.
The light source module includes more than two light sources.
The wavelength for the detection light that different detection light sources issues is different.
The light source module includes two light sources, can respectively issue the first light source of the first detection light and can issue
The second light source of second detection light source, the data processing module use the water content of following equation calculation skin:Penetration depth when wherein z is light source irradiation skin, μaw1、μaw2It is the moisture in skin respectively
The absorption coefficient at absorption coefficient and the second light source corresponding wavelength at the first light source corresponding wavelength, κ are
Compensation factor is a constant.
The detector includes detector shell, and the front end of the detector shell is provided with port, and the detection light passes through
Light is projected to form illumination path in the port, and the reflected light exposes to the photosensitive detecting module by port
So as to form reflected light path.
The detector housing forward end is provided with the sliding slot radially extended, the standard reference plate and the sliding slot
It is slidably matched.
The detector further includes filtration module, and the filtration module includes optical filter, and the focus module includes two
A spaced lens.
A kind of detection method of moisture content of skin: using light source module irradiation standard reference plate and pass through photosensitive detecting module
The light of examination criteria reference plate reflection, obtains standard spectrum signal, irradiates skin using light source module and passes through photosensitive detection
Module detects the light of skin reflex, obtains detection spectral signal, data processing module can according to the detection spectral signal and
The difference of the standard spectrum signal obtains the water content of skin.
The light source module includes more than two light sources, and the wavelength for the detection light that light source difference issues is different.
The light source module includes two light sources, can respectively issue the first light source of the first detection light and can issue
The second light source of second detection light, the data processing module use the water content of following equation calculation skin:Penetration depth when wherein z is light source irradiation skin, μaw1、μaw2It is the moisture in skin respectively
Absorption coefficient at first light source corresponding wavelength and at second light source corresponding wavelength, κ are compensation factor, are a constants.
The beneficial effects of the present invention are: by setting standard white plate as reference, use feeling optical detection module detects light source
The detection light of sending standard reference plate reflected light and obtain standard spectrum signal, and photosensitive detecting module can also detect
Survey light reflected light on the skin and obtain detection spectral signal, data processing module can according to detection spectral signal with it is described
The difference of standard spectrum signal obtains the water content of skin.It is effectively kept away using standard reference plate without doing reference using sample skin
Error caused by when having exempted from selection sample skin, also avoids influence of the real time environment situation to data detection accuracy.To this
The scheme effective solution big problem of measurement moisture content of skin error in the prior art.
Further, the present invention eliminates skin by the measurement method that the light source of two kinds of different wave lengths carries out Difference Absorption
The interference of middle other materials, reduces error, improves the accuracy of result.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is a kind of work block diagram of the embodiment one of the detector of moisture content of skin of the invention；
Fig. 2 is a kind of concrete structure schematic diagram of the embodiment one of the detector of moisture content of skin of the invention；
Fig. 3 is a kind of overall structure diagram of the embodiment one of the detector of moisture content of skin of the invention；
Fig. 4 is a kind of flow chart of the embodiment one of moisture content of skin detection method of the invention；
In figure: 1, light source module；2, filtration module；3, determinand；4, focus module；5, photosensitive detecting module；6, signal
Conversion module；7, data processing module；8, key module；9, memory module；10, display module；11, power module；12, first
Light source；13, second light source；14, filter plate；15, collector lens；16, standard reference plate；17, adjustable handrail；18, skin；19,
Lens group；20, lens group fixed frame；21, sensitive detector；22, PCB circuit board；23, A/D conversion circuit；24, microprocessor；
25, memory；26, power supply；27, display screen；28, key；29, detector shell.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of embodiment one of the detector of moisture content of skin of the invention, principle is as shown in Figure 1, include for issuing
The light source module 1 and photosensitive detecting module 5 of detection light are connected with data processing module 7, detector on photosensitive detecting module 5
It further include the standard reference plate 16 being movably arranged on detector, photosensitive detecting module 5 is able to detect the detection light in standard
The reflected light of reference plate 16 simultaneously obtains standard spectrum signal, and photosensitive detecting module 5 can also detect the detection light in skin
On reflected light and obtain detection spectral signal, data processing module can be according to detection spectral signal and standard spectrum signal
Difference obtains the water content of skin.
Preferably, light source module 1 includes more than two light sources.
Preferably, light source module 1 uses two light sources, and two light sources are respectively issue 1120nm wavelength and 1450nm
The light source of wavelength, at this time the volume fraction of moisture content of skin beWherein z is light when irradiating skin
Penetration depth, the parameter be definite value, μaw1、μaw2Be respectively in skin moisture at first light source corresponding wavelength and second light source
Absorption coefficient at corresponding wavelength, κ are compensation factor, are constant, are brought by existing known sample skin data above-mentioned
Equation can obtain its numerical value, according to calculate its size within the scope of 0.8-1.2.
Skin is mainly made of water, protein, fatty acid and inorganic salts.After illumination is mapped to skin, a part of light is by skin
Skin is reflected or is scattered out, and another part light is absorbed by skin histology.It is strong that research finds that moisture has near infrared band
Absorption, and other substances in skin histology are less in the absorption of 800-1700nm range.In near infrared band, the suction of moisture
Caused by receiving the sum of fundamental frequencies mainly as the fundamental frequency of O-H key, frequency multiplication and other atom keys.In 800-1700nm range wave band, sum of fundamental frequencies
Absorption near caused 960nm, the absorption near 1150nm and 1450nm caused by frequency multiplication.Wherein, it is inhaled as caused by frequency multiplication
It receives more strong.
There is Bill's Lambert law in the propagation of light, in uniform dielectric, Bill's Lambert lawOr A=μaL,
Wherein I0It is initial beam intensity, L is dielectric thickness, A=ln (I0/ I) it is that absorbance belongs to non-uniform dielectric for skin, to light
Existing absorption has scattering effect again, wherein absorption coefficient μaFor indicating absorption of the skin to light, scattering coefficient μsIndicate skin pair
The scattering of light.Therefore, total attenuation coefficient is μ to light in skint=μa+μs.In order to embody the influence of scattering, lambert Bill is fixed
Rule is corrected forI can be obtained by conversion1=I01exp[-(μ′s1+μa1·ct+μaw1·cw) z], I2=
I02exp[-(μ′s2+μa2·ct+μaw2·cw) z] and wherein z be light source irradiation skin when penetration depth, μ 's1, μ 's2It is skin respectively
Total reduced scattering coefficient of the skin tissue in first light source corresponding wavelength and second light source corresponding wavelength, μa1, μa2It is in skin respectively
Outer total absorption coefficient of other substances at first light source corresponding wavelength and at second light source corresponding wavelength of moisture removal, μaw1、μaw2
It is absorption coefficient of the moisture at first light source corresponding wavelength and at second light source corresponding wavelength, c in skin respectivelytDistinguish with c
It is the gas fraction of moisture removal outer other substances and moisture in skin.
The scheme analyzed compared to the prior art using full spectral band, this programme use two specific absorptions of water
Peak is analyzed, and the analysis of useless spectral information is reduced, and prior art needs pre-process full spectral band, and
Forecast set and verifying collection need to be splitted the spectrum into, multiple linear regression modeling is carried out, establishes standard calibration equation, process needs are adopted
Collect a large amount of spectroscopic data, process is complicated, time-consuming.The present invention is without acquiring excessive spectroscopic data, it is only necessary to a small amount of spectrum number
It is calculated according to the calculation formula established is substituted into, obtains compensation factor, establish perfect moisture volume fraction computation model.
Preferably, light source uses light emitting diode.
Preferably, detector further includes the filter module being used cooperatively with light source.
A kind of detector of moisture content of skin further includes light source module 1, filtration module 2, focus module 4, power module
11, determinand 3, photosensitive detecting module 5, signal conversion module 6, the light source module 1 that power module 11 is provides electric energy, light source die
Block 1 generates the light of corresponding wave band, and light is transferred to the determinand 3 after being filtered through filtration module 2, from determinand
The light of 3 reflections is emitted in photosensitive detecting module 5 after the focus module 4 focuses, and photosensitive detecting module 5 will be received
Optical signal be converted into electric signal, signal conversion module 6 includes signal amplification circuit and A/D conversion circuit, photosensitive detecting module 5
The current signal of output is transformed into the voltage signal of amplification through signal amplification circuit, then turns voltage signal through A/D conversion circuit
It is changed to digital signal output, signal conversion module 6 is connected with data processing module 7, and data processing module 7 carries out digital signal
Acquisition and processing.
Preferably, the detector of the moisture content of skin further includes memory module 9, and memory module 9 adopts data processing module 7
Collection and the data of processing are stored.
Preferably, the detector of the moisture content of skin further includes display module 10, and display module 10 is for showing aforementioned number
The data information for acquiring and handling according to processing module, display module 10 is connected with key module 8, in order to data processing module
7 acquisitions and processing data carry out auxiliary operation.
Preferably, determinand 3 includes standard reference plate and skin, when the measurement for reference spectra, selection criteria ginseng
According to plate as object to be measured；When the measurement for skin near-infrared spectral reflectance, select skin as object to be measured.
Preferably, focus module 4 will focus in photosensitive detecting module 5 from the reflected light of sample.
Preferably, signal conversion module 6 is made of signal amplification circuit and A/D conversion circuit, wherein photosensitive detecting module
The current signal of output is transformed into the voltage signal of amplification through signal amplification circuit, then turns voltage signal through A/D conversion circuit
It is changed to digital signal output.
Preferably, the light data received is obtained skin by moisture content of skin computation model by data processing module 7
Moisture measurement data, then measurement data storage is shown in a storage module and by display module.
Preferably, key module 8 is mainly used for realizing that setting to instrument parameter, the control of data acquisition and data are shown
Removing and reproduction input operation.
Preferably, power module 11 is mainly light source module 1, signal conversion module 6, data processing module 7 and display mould
The offer electric energy of block 10 is provided with the switch that can control aforementioned modules power on/off on power module 11.
A kind of specific structure of the detector of moisture content of skin is as shown in Figures 2 and 3, wherein light source module above-mentioned 1 is right
Light source is answered, aforementioned filter module 2 specifically uses filter plate 14, and aforementioned determinand uses standard reference plate 16 apart from skin, aforementioned
Focus module 4 uses lens group 19, and aforementioned photosensitive detecting module 5 uses sensitive detector 21, and aforementioned signal conversion module 6 uses
A/D conversion circuit 23, aforementioned data processing module 7 use microprocessor 24, and aforementioned keys module 8 specifically uses key 28, preceding
It states memory module 9 and uses memory 25, display module specifically uses display screen 27, remaining element is that detector is specifically tied
The increased auxiliary element of structure institute.
Light source includes first light source 12 and second light source 13, and standard reference plate is provided at the port of detector shell 29
16, standard reference plate 16 is disposed adjacent the adjustable handrail for adjustment criteria reference plate area at 29 port of detector shell
17, lens group 19 is provided at position corresponding with 29 port of detector shell, lens group 19 is far from detector shell 29
One end of port is arranged at intervals with the sensitive detector 21 for incuding the light for passing through lens group 19, and sensitive detector 21 will be believed
Number it is transferred to A/D converter 24 above-mentioned, the signal after conversion is shown in display screen 27 after microprocessor 24 is acquired and handled
On.
Preferably, the front of detector shell is beloid structure.The front end of detector shell is provided with port, light
Source is arranged in the side of detector shell front, and light source issues detection light and by port projects light to form illumination path,
Detection light is radiated on standard reference plate to which detection light reflects to form reflected light, and reflected light is exposed to photosensitive by port
Detecting module is so as to form reflected light path.
Preferably, sliding slot is provided on detector housing forward end port, the standard reference plate and the sliding slot slide
Cooperation.
Preferably, sensitive detector 21 uses InGaAs photodiode.It is carried out compared to the prior art using spectrometer
The detection of light, this programme greatly reduce required cost using InGaAs photodiode, reduce the cost of detector.
Preferably, display screen is LED liquid crystal display or LCD liquid crystal display screen.
Preferably, standard reference plate uses standard white plate.The standard white plate material therefor is high-purity sulfuric acid barium, magnesia
Or polytetrafluoroethylene (PTFE), in 800-1700nm spectral region, its reflectivity reaches 98% or more.
Preferably, microprocessor 24, data storage 25, power supply 26 are arranged in PCB circuit board 22.
Preferably, display screen 27 is arranged on detector shell 29, and display screen 27 uses LCD liquid crystal display screen.
Preferably, be additionally provided on detector shell 29 for the detector to moisture content of skin carry out input operation by
Key 28.
Preferably, lens group 19 includes two lens with identical focal length.
Preferably, filter plate uses band pass filter, and wherein band pass filter is for the half-peak breadth of incident light to be limited in
Within 10nm, condenser lens is used to incident light focusing on determinand or skin.
The course of work: opening LED light source, and standard reference plate 16 is adjusted to the position parallel with plane where detector port
It sets, the light-receiving area of standard reference plate 16 is transferred to maximum at this time, and light is directly from standard white plate surface reflection back by photosensitive detection
Device 21 receives, and obtains the reference spectra signal I at two different wave lengths01And I02；
Standard reference plate 16 is pushed and pulled with adjustable handrail 17 later, when standard reference plate 16 moves out detector port completely
After range of exposures, light, at this time illumination are not mapped on skin 18 standard reference plate 16, photosensitive from the reflected light of skin 18
Detector 21 receives, and obtains the sample spectral signals I at two different wave lengths1And I2；
It is the resulting two reference spectra signals I of measurement later01And I02And two sample spectral signals I1And I2It is defeated
Enter to microprocessor 25 and carry out numerical value calculating, obtains the water content in skin.
Embodiment two, light source module includes the light source of the light of two kinds of sending different wave lengths, using laser diode and filter
The combination of wave plate.
Embodiment three, light source module includes the light source of two kinds of sending different wave lengths, using the combination of tungsten halogen lamp and filter plate.
Example IV, adds a rotary shaft between standard reference plate and detector shell, rotary shaft is threaded through standard ginseng
According between plate and detector shell, standard reference plate can be spun upside down under the operation of staff.
A kind of embodiment one of the detection method of moisture content of skin of the invention, as shown in Figure 4: a kind of moisture content of skin
Detection method is as follows:
The light for irradiating standard reference plate using light source module and being reflected by photosensitive detecting module examination criteria reference plate,
Standard spectrum signal is obtained, and detects the light of skin reflex using light source module irradiation skin and by photosensitive detecting module,
Detection spectral signal is obtained, data processing module can obtain the water content of skin according to the difference of the detection spectral signal.
Light source module includes more than two light sources, and the light source is different, and the wavelength of the detection light of sending is different.
Light source module includes two light sources, can respectively issue the first light source of the first detection light and can issue second
The second light source of detection light, the data processing module use the water content of following equation calculation skin:Wherein z is penetration depth of the light when irradiating skin, which is definite value, μaw1、μaw2It is respectively
Absorption coefficient of the moisture at first light source corresponding wavelength and at second light source corresponding wavelength, κ are compensation factor in skin, are
Constant, its numerical value can be obtained by bringing above-mentioned equation by existing known sample skin data, according to calculate its size in 0.8-1.2
Within the scope of.
Preferably, the first light source and sending of 1120nm wavelength are issued respectively using two
The second light source of 1450nm wavelength, irradiates standard reference plate with first light source first, and photosensitive detecting module senses
The spectral signal of reflected light is I01, skin is irradiated with first light source later, photosensitive detecting module senses the spectrum letter of reflected light
Number be I1, standard reference plate then is irradiated with second light source, photosensitive detecting module senses that the spectral signal of reflected light is I02, it
Skin is irradiated with second light source afterwards, induction detecting module senses that the spectral signal of reflected light is I2, by introducing skin above-mentioned
The formula of moistureThe content of moisture of skin is calculated.
Specific steps are as follows:
Step 1, the light source for choosing 1150nm and 1450nm, is respectively radiated on standard white plate, measurement gained reflected light light
Spectrum signal is I01And I02；
Step 2, light source is respectively radiated on skin, measurement gained reflected light spectral signal is I1And I2；
Step 3, the Bill's Lambert law propagated in scattering medium according to light, available formula: I1=I01exp[-
(μ′s1+μa1·ct+μaw1·cw) z] and I2=I02exp[-(μ′s2+μa2·ct+μaw2·cw) z], wherein z is penetration depth, μ
′s1, μ 's2It is total reduced scattering coefficient of the skin histology at wavelength 1150nm and 1450nm, μ respectivelya1, μa2It is in skin respectively
Outer total absorption coefficient of other substances at wavelength 1150nm and 1450nm of moisture removal, μaw1, μaw2It is that moisture exists in skin respectively
Absorption coefficient at wavelength 1150nm and 1450nm, ct, cwIt is the gas point of moisture removal other outer substances and moisture in skin respectively
Number.
Step 4, since other substances are smaller in the absorption of 800-1700nm range outside moisture removal in skin, can approximation recognize
For μa1≈μa2；And the reduced scattering coefficient exponentially function decaying that skin histology is total, it can be approximately considered in the near infrared region
μ′s1≈μ′s2.Therefore, the volume fraction of moisture in gained skin histology is calculated are as follows:Wherein z is
Penetration depth of the light when irradiating skin, the parameter are definite value, μaw1、μaw2It is that moisture in first light source corresponds to wave in skin respectively
Absorption coefficient at strong point and second light source corresponding wavelength, κ are compensation factor, are constant, pass through existing known sample skin
Skin data, which bring above-mentioned equation into, can obtain its numerical value, according to calculate its size within the scope of 0.8-1.2.
The words such as above-described " first " and " second " only do not provide constraints for convenience of description.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of detector of moisture content of skin, including the light source module and photosensitive detecting module for issuing detection light, institute
State and be connected with data processing module on photosensitive detecting module, it is characterised in that: the detector further include be movably arranged on it is described
Standard reference plate on detector, the photosensitive detecting module be able to detect the detection light standard reference plate reflected light simultaneously
Obtain standard spectrum signal, and the photosensitive detecting module can also detect detection light reflected light on the skin and obtain
Spectral signal is detected, the data processing module can be according to the difference of the detection spectral signal and the standard spectrum signal
Obtain the water content of skin.
2. the detector of moisture content of skin according to claim 1, it is characterised in that: the light source module include two with
On light source.
3. the detector of moisture content of skin according to claim 2, it is characterised in that: the inspection that different detection light sources issues
The wavelength for surveying light is different.
4. the detector of moisture content of skin according to claim 3, it is characterised in that: the light source module includes two light
Source can respectively issue the first light source of the first detection light and can issue the second light source of the second detection light source, the number
The water content of following equation calculation skin is used according to processing module:Wherein z is light source irradiation skin
When penetration depth, μaw1、μaw2Be respectively absorption coefficient of the moisture at the first light source corresponding wavelength in skin and
Absorption coefficient at the second light source corresponding wavelength, κ are compensation factor, are a constants.
5. the detector of moisture content of skin according to claim 4, it is characterised in that: the detector includes detector shell
Body, the front end of the detector shell are provided with port, and the detection light projects light by the port to form photograph
Optical path is penetrated, the reflected light exposes to the photosensitive detecting module by port so as to form reflected light path.
6. the detector of moisture content of skin according to claim 5, it is characterised in that: the detector housing forward end is set
It is equipped with the sliding slot radially extended, the standard reference plate is slidably matched with the sliding slot.
7. the detector of moisture content of skin according to claim 6, it is characterised in that: the detector further includes optical filtering mould
Block, the filtration module include optical filter, and the focus module includes two spaced lens.
8. a kind of detection method of moisture content of skin, it is characterised in that: irradiate standard reference plate using light source module and pass through sense
The light of optical detection module examination criteria reference plate reflection, obtains standard spectrum signal, irradiates skin using light source module and leads to
The light for crossing photosensitive detecting module detection skin reflex, obtains detection spectral signal, data processing module can be according to the detection
The difference of spectral signal and the standard spectrum signal obtains the water content of skin.
9. the detection method of moisture content of skin according to claim 8, it is characterised in that: the light source module includes two
The wavelength of a above light source, the detection light that light source difference issues is different.
10. the detection method of moisture content of skin according to claim 9, it is characterised in that: the light source module includes two
A light source can respectively issue the first light source of the first detection light and can issue the second light source of the second detection light, described
Data processing module uses the water content of following equation calculation skin:Wherein z is light source irradiation
Penetration depth when skin, μaw1、μaw2It is respectively the moisture in skin at first light source corresponding wavelength and second light source is corresponding
Absorption coefficient at wavelength, κ are compensation factor, are a constants.
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