CN112472099A - Skin surface oil content detection device and method - Google Patents
Skin surface oil content detection device and method Download PDFInfo
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- CN112472099A CN112472099A CN202011482960.8A CN202011482960A CN112472099A CN 112472099 A CN112472099 A CN 112472099A CN 202011482960 A CN202011482960 A CN 202011482960A CN 112472099 A CN112472099 A CN 112472099A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 title claims description 7
- 239000013078 crystal Substances 0.000 claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 239000010453 quartz Substances 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 17
- 230000003993 interaction Effects 0.000 claims abstract description 13
- 230000002452 interceptive effect Effects 0.000 claims abstract description 5
- 239000004519 grease Substances 0.000 claims description 26
- 239000000523 sample Substances 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000003380 quartz crystal microbalance Methods 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 17
- 230000010355 oscillation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 201000004624 Dermatitis Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 210000001732 sebaceous gland Anatomy 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 208000017520 skin disease Diseases 0.000 description 1
- 230000036555 skin type Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/08—Design features of general application for actuating the drive
- G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
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- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Dermatology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
The invention provides a device and a method for detecting the content of oil on the surface of skin, comprising the following steps: data acquisition unit, data processing unit, interactive unit to and the shell, wherein: the data acquisition unit is used for acquiring quartz crystal frequency change information corresponding to a skin test area; the data processing unit is used for converting the frequency change information of the quartz crystal into oil content information of the skin surface and sending the oil content information to the interaction unit; and the interaction unit is used for displaying the oil content information according to the trigger information input by the user. According to the invention, through a quartz crystal microbalance technology, the electrical signal conversion of the oil content is carried out, and the collection of skin oil information is realized, so that the oil content on the skin surface is measured more accurately and rapidly, and the use is convenient.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a device and a method for detecting the content of grease on the surface of skin.
Background
The oil secreted by sebaceous gland forms a weakly acidic oil film on skin surface, and has effects of moistening skin and hair, preventing skin water evaporation and skin allergy, and inhibiting and killing skin surface bacteria. The oil content on the skin surface is an important reference index for judging the skin type, and the change of the oil content reflects the metabolism condition of the human body. Meanwhile, abnormal secretion of skin oil can cause certain skin diseases. Therefore, the method has great significance in detecting the content of the skin oil.
In the current skin oil measurement method, an internationally accepted measurement mode is to use a skin oil testing instrument (SEBUMERER) for measurement. Similar grease test instrument mainly used professional detection mechanism, there are measurement rate slow, test equipment is expensive, test fitting is difficult to find and generally promote the degree of difficulty big scheduling problem. Therefore, the development of a portable, rapid and accurate skin oil detection device which can be used for the common public has important significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for detecting the content of oil on the surface of skin.
In a first aspect, the present invention provides a device for detecting the fat content on the surface of skin, comprising: data acquisition unit, data processing unit, interactive unit to and the shell, wherein:
the data acquisition unit is used for acquiring quartz crystal frequency change information corresponding to a skin test area;
the data processing unit is used for converting the frequency change information of the quartz crystal into oil content information of the skin surface and sending the oil content information to the interaction unit;
and the interaction unit is used for displaying the oil content information according to the trigger information input by the user.
Optionally, the data acquisition unit comprises: grease collection probe, frequency acquisition module to and pressure sensor, wherein:
the pressure sensor is used for monitoring the pressure value of the grease collecting probe in real time when the grease collecting probe is contacted with the skin;
the oil collecting probe is internally provided with a QCM sensor, and the QCM sensor is used for collecting electric signals corresponding to a skin test area under the condition of stable pressure values;
and the frequency acquisition module is used for analyzing the electric signals and identifying the frequency change information of the quartz crystal.
Optionally, the data processing unit includes: an MSP430 processor, wherein:
the MSP430 processor processes the quartz crystal frequency change information acquired by the data acquisition unit according to internal clock information set by a communication protocol to obtain the oil content of the skin test area.
Optionally, the interaction unit includes: the display panel is provided with a key and a display; wherein:
the display is used for displaying the oil content information of the skin test area;
the key is used for receiving triggering information input by a user, and the triggering information comprises: start-up information, shut-down information, timing information.
In a second aspect, the present invention provides a method for detecting a skin surface oil content, which is applied to the apparatus for detecting a skin surface oil content according to any one of the first aspect, the method including:
aligning the data acquisition unit to a skin test area, and acquiring corresponding quartz crystal frequency change information within preset test time;
converting the frequency change information of the quartz crystal into oil content information of the skin surface;
and displaying the oil content information.
Compared with the prior art, the invention has the following beneficial effects:
according to the device and the method for detecting the oil content on the skin surface, provided by the invention, the electric signal conversion of the oil content is carried out through a quartz crystal microbalance technology, so that the collection of the oil information of the skin is realized, the oil content on the skin surface is more accurately and rapidly measured, the measurement precision is high, and the use is convenient.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural diagram of a device for detecting the content of oil on the skin surface according to an embodiment of the present invention;
in the figure:
1-a grease collecting probe;
2-a pressure sensor;
3-a frequency collector;
4-a data signal processor;
5-a display;
6-key press;
7-outer shell.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The embodiment of the invention provides a device for detecting the content of grease on the surface of skin, which comprises: data acquisition unit, data processing unit, interactive unit to and the shell, wherein: the data acquisition unit is used for acquiring quartz crystal frequency change information corresponding to a skin test area; the data processing unit is used for converting the frequency change information of the quartz crystal into oil content information of the skin surface and sending the oil content information to the interaction unit; and the interaction unit is used for displaying the oil content information according to the trigger information input by the user.
In this embodiment, data acquisition unit, data processing unit, interactive unit all set up inside the shell, and the shell plays the effect of supporting and its inside components and parts of protection. The data acquisition unit acquires frequency change information of the quartz crystal caused by the change of the quality of the grease on the skin surface of the detected area; the interaction unit displays the data of the measured skin surface oil content and performs selection function operation; the data processing unit is electrically connected with the data acquisition unit and the interaction unit and is used for processing the information acquired by the data acquisition unit.
Illustratively, the data acquisition unit includes: grease collection probe, frequency acquisition module to and pressure sensor, wherein: the pressure sensor is used for monitoring the pressure value of the grease collecting probe in real time when the grease collecting probe is contacted with the skin; the oil collecting probe is internally provided with a QCM sensor which is used for collecting an electric signal corresponding to a skin test area under the condition of stable pressure value; and the frequency acquisition module is used for analyzing the electric signals and identifying the frequency change information of the quartz crystal.
In this embodiment, the grease collecting probe in the data collecting unit may adopt a Quartz Crystal Microbalance (QCM) sensor, and when the data collecting unit contacts with the skin, the grease quality change on the skin surface of the measured area is sensed and converted into an electrical signal. The frequency acquisition module is connected with an oscillating circuit in the QCM probe and processes frequency signals through a digital counter. Optionally, the sinusoidal analog signal is converted before the signal enters the digital counter to improve the recognition of the frequency signal and digitize the collected frequency signal. The pressure sensor monitors the pressure value of the data acquisition unit when contacting with the skin in real time, so that the contact pressure of the skin and the grease acquisition probe keeps stable (at the same pressure value or in a threshold range) when a user tests, and the measurement error can be reduced; to more accurately measure the oil content of the skin surface.
Utilize Quartz Crystal Microbalance (QCM) sensor to carry out the signal conversion of the signal of telecommunication of grease content in this embodiment, realize the collection to skin grease information, the principle of its foundation is: the instrument for detecting the slight quality is realized by utilizing the piezoelectric effect of the crystal. Specifically, when the quartz crystal is stressed and deformed in a specific direction, two opposite surfaces of the quartz crystal can generate electric charges with different polarities, so that forced oscillation can be generated when the stressed crystal is under alternating voltage. When a slight mass is adsorbed on the surface electrode of the quartz crystal, the frequency changes accordingly. Therefore, the change in the content of skin oil adsorbed on the crystal surface can be measured by the piezoelectric resonance phenomenon.
In this embodiment, the accuracy of the frequency reading performed by the data acquisition module may affect the overall measurement accuracy. In order to attenuate such an influence, in the present embodiment, a series type oscillation circuit is to be employed, and a filter block is designed in the oscillation circuit. Specifically, a filter circuit at the front end and a voltage conversion circuit at the rear end are arranged, a filter capacitor is designed at a power supply port of the oscillating circuit to carry out filtering firstly, a common-mode filter inductor is designed to carry out power supply filtering later, and finally, the filter capacitor is added to carry out filtering. The voltage conversion circuit is arranged behind the filter circuit, and the three-terminal voltage stabilizer is adopted to reduce the ripple of the power supply and ensure that the oscillation circuit obtains more stable power supply.
In this embodiment, the pressure sensor collects pressure information between the skin being measured and the sensor. Because the skin has elasticity, the contact force between the testing device and the tested skin is different, the attachment content of the grease in the tested area can be changed, the tested frequency data can be different, and the grease content on the surface of the tested skin can be directly influenced. Therefore, after the pressure sensor is added in the implementation, the measurement error can be greatly reduced by reading the measurement result under the specific pressure.
Illustratively, the data processing unit includes: an MSP430 processor, wherein: the MSP430 processor processes the quartz crystal frequency change information acquired by the data acquisition unit according to internal clock information set by a communication protocol to obtain the oil content of the skin test area.
Illustratively, the interaction unit includes: the display panel is provided with a key and a display; wherein: the display is used for displaying the oil content information of the skin test area; the key is used for receiving triggering information input by a user, and the triggering information comprises: start-up information, shut-down information, timing information.
The embodiment of the invention also provides a method for detecting the content of the skin surface oil, which is characterized by being applied to the device for detecting the content of the skin surface oil, and the method comprises the following steps: aligning the data acquisition unit to a skin test area, and acquiring corresponding quartz crystal frequency change information within preset test time; converting the frequency change information of the quartz crystal into the oil content information of the skin surface; and displaying the oil content information.
Fig. 1 is a schematic structural diagram of a device for detecting a content of oil on a skin surface according to an embodiment of the present invention, as shown in fig. 1, the device may include: the device comprises a grease collecting probe 1, a pressure sensor 2, a frequency collector 3, a data signal processor 4, a display 5, a key 6 and a shell 7. Specifically, the frequency collector 3 is used for collecting frequency signals of the grease collecting probe 1, continuously collecting the signals for 10 times, and performing mean value and variance operation on collected effective data, wherein the obtained mean value and variance are used as sampling results; the effective value range of frequency acquisition is (10.1-9.9) MHz; the time length of each acquisition of the frequency is (1.2-1.5) s.
The calculation formula of the frequency mainly uses the Sauerberry equation:
in the formula: Δ f represents the resonance frequency shift of the quartz crystal, Δ m represents the surface quality variation of the crystal electrode, f represents the reference frequency of the crystal, a represents the thickness of the wafer surface electrode, μ represents the elastic stiffness coefficient of the crystal, and ρ represents the density of the quartz crystal.
The pressure sensor 2 is used for collecting pressure information between the measured skin and the instrument. When the grease collecting probe 1 is in contact with the surface of the skin, pressure data are fed back to the main control chip, and the pressure is maintained at a constant value.
The embodiment takes the read oil content under the specific pressure as a measurement result, and can greatly improve the measurement precision.
Illustratively, the data processing unit can include an AD acquisition chip and a single chip microcomputer. The AD acquisition chip is specially used for frequency measurement, is used for accurately processing the acquired frequency value, and can convert the frequency signal into a digital signal.
The single chip microcomputer of the embodiment is suitable for measurement of ultra-low power consumption (minimum to a few microamps), high-performance measurement of high precision (reaching 21-bit effective bits), and rapid measurement of up to 50 ten thousand times/second. For example, the single-chip microcomputer MSP430 is an ultra-low power consumption chip, and has strong processing capability and rich peripheral resources.
Specifically, the single-chip microcomputer MSP430 provides a sampling clock for the AD acquisition chip, processes the measured frequency data and pressure data, calculates the content of grease on the surface of the skin, and controls the normal operation of the keys and the display. The key is used for switching on and off and starting the working mode. The display is used for displaying data such as skin grease, pressure and the like. When in the real-time measurement mode, the display can display the real-time pressure value and the oil content on the surface of the skin.
Specifically, referring to fig. 1, during testing, the left button is pressed for a long time to start up, and then the right button is pressed to switch to the measurement mode. The test device is placed vertically on the skin to be tested and the display will count down until the timing is over by pressing the test device. The skin surface oil content on the display is read. And if the oil content of the skin surface at other positions is to be measured, replacing the measuring head and repeating the operation. After the measurement is finished, the left key is pressed for a long time to shut down the machine.
It should be noted that, the steps in the method for detecting the content of skin surface oil can be implemented by using corresponding modules, units, and the like in the device for detecting the content of skin surface oil, and those skilled in the art can refer to the technical scheme of the device to implement the step flow of the method, that is, the embodiment in the device can be understood as a preferred embodiment of the implementation method, and details are not described herein.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (5)
1. A skin surface oil content detection device, characterized by comprising: data acquisition unit, data processing unit, interactive unit to and the shell, wherein:
the data acquisition unit is used for acquiring quartz crystal frequency change information corresponding to a skin test area;
the data processing unit is used for converting the frequency change information of the quartz crystal into oil content information of the skin surface and sending the oil content information to the interaction unit;
and the interaction unit is used for displaying the oil content information according to the trigger information input by the user.
2. The device for detecting the content of the oil on the skin surface according to claim 1, wherein the data acquisition unit comprises: grease collection probe, frequency acquisition module to and pressure sensor, wherein:
the pressure sensor is used for monitoring the pressure value of the grease collecting probe in real time when the grease collecting probe is contacted with the skin;
the oil collecting probe is internally provided with a QCM sensor, and the QCM sensor is used for collecting electric signals corresponding to a skin test area under the condition of stable pressure values;
and the frequency acquisition module is used for analyzing the electric signals and identifying the frequency change information of the quartz crystal.
3. The skin surface oil content detection device according to claim 1, wherein the data processing unit comprises: an MSP430 processor, wherein:
the MSP430 processor processes the quartz crystal frequency change information acquired by the data acquisition unit according to internal clock information set by a communication protocol to obtain the oil content of the skin test area.
4. The skin surface oil content detection device according to claim 1, wherein the interaction unit comprises: the display panel is provided with a key and a display; wherein:
the display is used for displaying the oil content information of the skin test area;
the key is used for receiving triggering information input by a user, and the triggering information comprises: start-up information, shut-down information, timing information.
5. A method for detecting the oil content on the surface of skin, which is applied to the device for detecting the oil content on the surface of skin according to any one of claims 1 to 4, and which comprises:
aligning the data acquisition unit to a skin test area, and acquiring corresponding quartz crystal frequency change information within preset test time;
converting the frequency change information of the quartz crystal into oil content information of the skin surface;
and displaying the oil content information.
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| CN202011482960.8A CN112472099A (en) | 2020-12-15 | 2020-12-15 | Skin surface oil content detection device and method |
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| CN202011482960.8A CN112472099A (en) | 2020-12-15 | 2020-12-15 | Skin surface oil content detection device and method |
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