Infrared technology-based skin sebum measurement method, measurement instrument and measurement system

Abstract

An infrared technology-based skin sebum measurement method, a measurement instrument and a measurement system, said method comprising: controlling to emit an infrared signal to skin undergoing test (S101); controlling to receive an infrared signal reflected by said skin and converting same into an electrical signal (S102); and on the basis of the electrical signal, acquiring the sebum state of said skin (S103). The skin sebum measurement on the basis of the principles of infrared signal absorption and reflection of skin (namely, the more the sebum on a skin surface, the more infrared rays absorbed, the less infrared rays reflected, the weaker the light received by an infrared receiver (1022), and the smaller the corresponding electric signal) achieves a high measurement speed, low cost and accurate results.

Description

Skin oil detection method, detection instrument and detection system based on infrared technology Technical Field

[0001] The present invention relates to the technical field of skin detection, in particular to a skin oil detection method, a detection instrument and a detection system based on infrared technology. Background Art

[0002] There are two main methods for measuring sebum (skin oil) that are recognized worldwide. The first method uses Sebumeter SM810 (CK, Germany), which uses the world's recognized The first method, based on the principle of an oil spot photometer, involves applying a 0.1mm thick special matte tape to the skin. After absorbing the oil from the human skin, the tape becomes translucent, and the amount of light transmitted changes accordingly. Therefore, its transparency is proportional to the amount of oil: the more oil absorbed, the greater the light transmittance. By measuring the light transmittance, the oil content of the skin can be determined. The second method uses the principle of image analysis. After the skin to be tested is defatted, an oil-absorbing adhesive microporous film is applied to the skin. Because oil does not scatter light, when the air in the film's micropores is replaced by absorbed oil, the film becomes transparent, forming light-transmitting spots that coincide with the openings of the hair follicles. After collecting the tape, professional image analysis software is used to quantify the number of sebum spots, maximum and minimum values, and the sebum excretion rate of the measured area. Both of these approaches have certain limitations.

[0003] The limitations of the first method are as follows:

[0004] 1. High cost. CK sebum testing equipment costs tens of thousands of yuan and requires specific oil-absorbing paper consumables.

[0005] 2. The oil-absorbing paper will still be affected by moisture, resulting in a decrease in accuracy;

[0006] 3. The detection effect of rough skin such as scalp and other hair-containing areas has large errors;

[0007] 4. It takes a long time. It takes 15 seconds to use the oil-absorbing paper, and then tens of seconds of equipment analysis time;

[0008] The limitations of the second method are as follows:

[0009] 1. The cost is high and oil-absorbing paper consumables are required during use;

[0010] 2. The detection effect of rough skin such as scalp and other hair-containing areas has large errors;

[0011] 3. The oil-absorbing paper will still be affected by moisture, resulting in a decrease in accuracy;

[0012] In addition, both methods are performed in a laboratory or the subjects are unable to complete the sebum detection of the designated area by themselves.

[0013] Summary of the Invention

[0014] The main purpose of the present invention is to propose a skin oil detection method, detection instrument and detection system based on infrared technology, which overcomes the shortcomings of the existing technology. The present invention performs skin oil detection based on the principle of skin absorption and reflection of infrared signals (the more oil on the skin surface, the more infrared rays are absorbed and the less infrared rays are reflected, the weaker the light received by the infrared receiver, and the smaller the corresponding electrical signal). The detection speed is fast, the cost is low, and the results are accurate.

[0015] The present invention adopts the following technical solutions:

[0016] In the first aspect, a skin oil detection method based on infrared technology comprises:

[0017] S101, controlling the emission of infrared signals to the detection skin;

[0018] S102, controlling the reception of infrared signals reflected by the skin and converting them into electrical signals;

[0019] S103: Acquire and detect the oiliness of the skin based on the electrical signal.

[0020] Preferably, the oil state includes the amount of oil; and acquiring and detecting the amount of oil on the skin based on the electrical signal specifically includes:

[0021] The electrical signal is processed by A / D to obtain an electrical signal value, and the amount of oil in the detected skin is obtained based on a quadratic equation of the electrical signal value; the electrical signal value is negatively correlated with the amount of oil.

[0022] Preferably, the oil state includes an oil level; and obtaining and detecting the oil level of the skin based on the electrical signal specifically includes:

[0023] The electrical signal is processed by A / D to obtain an electrical signal value, the electrical signal value is compared with a preset range, and the oil level of the detected skin is obtained according to the range to which the electrical signal belongs.

[0024] Preferably, the grease levels include dry and lack of oil, water and oil balance, light grease, medium grease and heavy grease; the electrical signals corresponding to dry and lack of oil, water and oil balance, light grease, medium grease and heavy grease decrease in sequence.

[0025] Preferably, controlling the reception of infrared signals reflected by the skin and converting them into electrical signals specifically includes:

[0026] The infrared signal reflected by the skin is received and detected, and converted into a current signal; the current signal is converted into a voltage signal through a voltage divider resistor.

[0027] Preferably, after the current signal is converted into a voltage signal by a voltage divider resistor, the method further includes:

[0028] amplifying the voltage signal;

[0029] It is determined whether the voltage signal after the amplification process reaches a preset value. If so, step S103 is executed.

[0030] On the other hand, a skin oil detection instrument based on infrared technology comprises:

[0031] The detection terminal comprises a conductive transmitting terminal and a conductive receiving terminal respectively in contact with the detection skin;

[0032] The infrared module is arranged inside the skin oil detection instrument and includes an infrared transmitter and an infrared receiver; the infrared transmitter is used to transmit infrared signals to the detection skin; the infrared receiver is used to receive the infrared signals reflected by the detection skin and convert them into electrical signals;

[0033] The control module includes an infrared control unit and a data processing unit; the infrared control unit is used to control the opening / closing of the infrared transmitter and the infrared receiver; the data processing unit is used to receive the electrical signal sent by the infrared receiver.

[0034] Preferably, the data processing unit is also used to amplify the electrical signal and determine whether the amplified electrical signal reaches a preset value. If it is greater than, the electrical signal value is obtained through A / D processing, and the oiliness state of the skin is detected based on the electrical signal value.

[0035] Preferably, the data processing unit is also used to amplify the electrical signal and determine whether the amplified electrical signal reaches a preset value. If it does, the electrical signal value is obtained through A / D processing and sent to an external terminal device.

[0036] Preferably, the skin oil detection instrument based on infrared technology further includes: an infrared focusing lens arranged between the detection terminal and the infrared module; the infrared signal emitted by the infrared transmitter is focused by the infrared focusing lens.

[0037] Preferably, the skin oil detection instrument based on infrared technology further includes a switch module; the switch module is connected to the control module and is used to start the skin oil detection instrument and / or trigger the infrared module.

[0038] Preferably, the infrared technology-based skin oil detection instrument further includes: a communication module; the control module is connected to an external terminal device via the communication module.

[0039] Preferably, the skin oil detection instrument based on infrared technology further includes: a sound prompt module; the sound prompt module is connected to the control module to provide voice prompts.

[0040] In the third aspect, a skin oil detection system based on infrared technology includes the skin oil detection instrument based on infrared technology; and also includes an external terminal device; the external terminal device is connected to the skin oil detection instrument based on infrared technology, and is used to receive the oil status of the skin and provide prompts.

[0041] In a fourth aspect, a skin oil detection system based on infrared technology includes the skin oil detection instrument based on infrared technology; and also includes an external terminal device; the external terminal device is connected to the skin oil detection instrument based on infrared technology, and is used to receive an electrical signal value, and obtain the oil status of the detected skin based on the received electrical signal value and provide a prompt.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] (1) The present invention includes controlling the emission of infrared signals to the detection skin; controlling the reception of infrared signals reflected by the detection skin and converting them into electrical signals; and obtaining the oiliness of the detection skin based on the electrical signals. The present invention detects skin oiliness based on the principle of skin absorption and reflection of infrared signals (the more oil there is on the skin surface, the more infrared rays are absorbed, the less infrared rays are reflected, the weaker the light received by the infrared receiver, and the smaller the corresponding electrical signal). The detection speed is fast, the cost is low (the main components only require an infrared transmitter and an infrared receiver), and the results are accurate.

[0044] (2) The present invention can output various forms of detection results to meet the various needs of users. Specifically, when the user wishes to obtain the amount of oil, the electrical signal is processed by A / D to obtain an electrical signal value, and the amount of oil on the detected skin is obtained based on a quadratic equation of the electrical signal value; when the user wishes to obtain the oil level, the electrical signal is processed by A / D to obtain an electrical signal value, and the electrical signal value is compared with a preset range, and the oil level of the detected skin is obtained according to the range to which the electrical signal belongs;

[0045] (3) The present invention detects the oiliness of the skin only when the electrical signal corresponding to the reflected infrared signal reaches a preset value, thereby preventing inaccurate detection results from being performed when the device is not in close contact with the skin.

[0046] (4) The present invention provides an infrared focusing lens between the detection terminal and the infrared module, so that the divergent infrared light emitted by the infrared emitter is focused by the infrared focusing lens, so that more infrared light is focused on the skin, which can make the detected electrical signal value more obvious and improve the accuracy of the detection result.

[0047] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are listed below.

[0048] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] FIG1 is a flow chart of a skin oil detection method based on infrared technology according to a first embodiment of the present invention;

[0050] FIG2 is a schematic diagram showing changes in skin oil content and infrared detection voltage values ​​for different test subjects according to the first embodiment of the present invention;

[0051] FIG3 is a schematic diagram of a curve showing the infrared detection voltage value and the amount of skin oil according to the first embodiment of the present invention;

[0052] FIG4 is a perspective schematic diagram of a skin oil detection instrument based on infrared technology according to a second embodiment of the present invention;

[0053] FIG5 is a cross-sectional view of a skin oil detection instrument based on infrared technology according to a second embodiment of the present invention;

[0054] FIG6 is an exploded view of a skin oil detection instrument based on infrared technology according to a second embodiment of the present invention;

[0055] FIG7 is a schematic structural diagram of a contact terminal and skin forming a loop according to a second embodiment of the present invention;

[0056] FIG8 is a structural block diagram of a skin oil detection system based on infrared technology according to the third and fourth embodiments of the present invention. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0058] In the description of the present invention, it should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0059] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, step identifiers S101, S102, S103, etc. are only used for convenient expression and do not represent the execution order. The corresponding execution order can be adjusted.

[0062] Example 1

[0063] 1 , this embodiment provides a skin oil detection method based on infrared technology, including:

[0064] S101, controlling the emission of infrared signals to the detection skin;

[0065] S102, controlling the reception of infrared signals reflected by the skin and converting them into electrical signals;

[0066] S103: Acquire and detect the oiliness of the skin based on the electrical signal.

[0067] It should be noted that the execution entities of the above-mentioned S101 to S103 are all control modules of skin oil detection instruments based on infrared technology (such as control chips such as single-chip microcomputers or MCUs), or the execution entities of S101 to S102 are control chips of skin oil detection instruments based on infrared technology (such as single-chip microcomputers or MCUs), and the execution entity of S103 is an external terminal device or a cloud server. The S103 can also be partially executed on the control module of the skin oil detection instrument based on infrared technology, and partially executed on the external terminal device or the cloud server. The specific settings can be made as needed, and this embodiment does not impose any restrictions.

[0068] Specifically, the present invention uses an infrared transmitter to emit an infrared signal, which is then reflected by the skin via an infrared receiver integrated into the same light source board. After the infrared-based skin oil and fat detection instrument is powered on and the detection terminals are in contact with the skin, forming a seal, a short press of the infrared transmitter triggers the infrared signal to be emitted. Waiting a few seconds, the oil and fat detection result is obtained.

[0069] The working principle of this embodiment is as follows:

[0070] 1. Infrared emission: The control chip on the circuit board controls the IO port IR-TX1 to output high and low levels to control the short-range signal infrared transmitter to emit infrared signals.

[0071] Specifically, when the IO port IR-TX1 is controlled to output a high level, the infrared transmitter transmits an infrared signal; when the IO port IR-TX1 is controlled to output a low level, the infrared transmitter is turned off.

[0072] 2. Infrared reception: The control chip on the circuit board outputs the control level through the control IO port IR-RX_EN to control the receiving circuit to receive infrared signals.

[0073] Specifically, when the control IO port IR-RX_EN outputs a high level, the infrared receiver is in a working state and can receive the infrared signal sent by the infrared transmitter; when the control IO port IR-RX_EN outputs a low level, the infrared receiver is in a closed state.

[0074] 3. Specific working principle of infrared light receiving and transmitting:

[0075] Short press the switch (button) of the skin oil detection instrument. After the control chip on the circuit board receives the signal, it first controls the IO port IR-RX_EN to output a high level, and the infrared receiver is in working state and can receive infrared signals. After turning on the receiving circuit, it then controls the IO port IR-TX1 to output a high level, and the infrared transmitter transmits an infrared signal (940nm infrared light). Part of the infrared light emitted to the skin is absorbed by the skin, and the other part is reflected by the skin. If the emitted light signal is received by the infrared receiver, it will immediately be converted into a current signal. The current signal is then converted into a voltage signal through a voltage divider resistor. The converted voltage signal will be amplified by the two-pole operational amplifier inside the main control chip. The amplified signal is then transmitted to the main control chip for further processing to determine whether an infrared signal is received (if the signal voltage amplitude is not zero, it is considered that the signal is received). If the received signal is determined to be the expected signal (reaching the preset value), an internal interrupt occurs within the main control chip, triggering the internal ADC (a circuit module that converts analog signal voltage signals into digital signals, i.e., data). This voltage signal is converted into a numerical value, which is then processed to obtain the grease status. Alternatively, the numerical value is transmitted to an external terminal device via the communication module on the circuit board for further processing to obtain the grease status. At this time, if the control chip controls IO port IR-TX1 to output a low level, the infrared transmitter is turned off. When the control IO port IR-TX1 outputs a low level, the infrared receiver LED2 is turned off.

[0076] 4. As the skin surface becomes more and more oily, more infrared rays are absorbed and less infrared rays are reflected. The light received by the infrared receiver becomes weaker, the converted voltage becomes smaller, and the value becomes lower.

[0077] Furthermore, only after contact with the skin are the IO ports IR-RX_EN and IR-TX1 sequentially controlled to output high levels, sealing the detection area. Specifically, this can be achieved by briefly pressing a switch button after the detection terminal is in close contact with the skin, or by controlling the IO ports IR-RX_EN and IR-TX1 to output high levels only after the control chip detects that the electrical signal output by the output terminal reaches a preset threshold. This ensures that the skin oil detection instrument forms a sealed state when in contact with the skin, and the interior of the skin oil detection instrument is black, minimizing the impact of ambient light on the detection results and ensuring the accuracy of the test results.

[0078] In an optional solution of this embodiment, the oil state includes the amount of oil; and obtaining and detecting the amount of oil on the skin based on the electrical signal specifically includes:

[0079] The electrical signal is processed by A / D to obtain an electrical signal value, and the amount of oil in the detected skin is obtained based on a quadratic equation of the electrical signal value; the electrical signal value is negatively correlated with the amount of oil.

[0080] Table 1 below shows the voltage values ​​collected by different testers under increasing amounts of epidermal oil. The testing environment, detection distance, and application area were identical for each test.

[0081] Table 1

[0082] It can be seen from Table 1 that, when the variables are controlled, the detected voltage value decreases as the amount of skin oil increases.

[0083] Figure 2 shows a graph plotting the changes in skin oil content and infrared detection voltage for different test subjects, based on Table 1. The horizontal axis represents the test subject, and the vertical axis represents the infrared detection voltage for the corresponding oil content. Series 1-10 represent gradually increasing oil content, with Series 1 having the lowest oil content and Series 10 having the highest. As can be seen from the figure, even when different test subjects applied the same amount of oil, the voltage values ​​obtained by infrared detection were essentially consistent.

[0084] According to the test data, the relationship between the voltage value and the amount of skin oil can be fitted, as shown in Figure 3. Further obtain the corresponding fitting equation, such as

[0085] As shown in Figure 3, the test data is made into a scatter plot, and the corresponding trend line is fitted to obtain the calculation formula between the grease amount and the test voltage value, as follows: y = 0.0123x 2 -0.2998x+3.0877

[0086] Among them, y represents the voltage value and x represents the amount of grease.

[0087] It should be noted that the above fitting formula is only an example, and the specific coefficients may vary within a range.

[0088] In another optional solution of this embodiment, the oil state includes an oil level; and obtaining the oil level of the skin based on the electrical signal specifically includes:

[0089] The electrical signal is processed by A / D to obtain an electrical signal value, the electrical signal value is compared with a preset range, and the oil level of the detected skin is obtained according to the range to which the electrical signal belongs.

[0090] Specifically, the grease levels include dry, oil-free, balanced, light, medium, and heavy. The electrical signals corresponding to these three levels decrease in descending order. For example, a voltage above 2.5V indicates dry, oil-free, 2.5-2.35 indicates balanced, 2.35-1.9 indicates light, 1.9-1.5 indicates medium, and below 1.5V indicates heavy.

[0091] It should be noted that the above range levels are only settings. In specific implementation, more oil and fat grades can be divided as needed, and the range can be adjusted as needed. This embodiment does not limit this.

[0092] Specifically, controlling the reception and detection of infrared signals reflected by the skin and converting them into electrical signals includes:

[0093] The infrared signal reflected by the skin is received and detected, and converted into a current signal; the current signal is converted into a voltage signal through a voltage divider resistor.

[0094] Furthermore, as described in the principle, after the current signal is converted into a voltage signal by the voltage divider resistor, the method further includes:

[0095] amplifying the voltage signal;

[0096] Determine whether the voltage signal after amplification reaches a preset value. If so, execute S103; if not, give a prompt.

[0097] Specifically, if the voltage signal after amplification is smaller than a preset value, it indicates that the detection terminal is not in close contact with the skin, and the user needs to be prompted to place the detection terminal close to the skin.

[0098] The present invention detects skin oiliness based on the principle of skin absorption and reflection of infrared signals (the more oil there is on the skin surface, the more infrared rays are absorbed, the less infrared rays are reflected, the weaker the light received by the infrared receiver, and the smaller the corresponding electrical signal). The detection speed is fast and the cost is low (the main components only require an infrared transmitter and an infrared receiver). In addition, the oil amount and oil level detected by the present invention have experimental basis, so the test results are accurate and can reflect the true condition of the skin, and then provide corresponding improvement suggestions such as cleaning, so that users can clean their faces accurately and efficiently.

[0099] Example 2

[0100] Referring to Figures 4 to 6, a skin oil detection instrument based on infrared technology includes:

[0101] The detection terminal 101 includes a conductive transmitting terminal 1011 and a receiving terminal 1012 that are in contact with the detection skin respectively;

[0102] The infrared module 102 is provided inside the skin oil detection instrument and includes an infrared transmitter 1021 and an infrared receiver 1022. The infrared transmitter 1021 is used to transmit infrared signals to the detection skin; the infrared receiver 1022 is used to receive the infrared signals reflected by the detection skin and convert them into electrical signals.

[0103] The control module 103 includes an infrared control unit and a data processing unit; the infrared control unit is used to control the on / off of the infrared transmitter 1021 and the infrared receiver 1022; the data processing unit is used to receive the electrical signal sent by the infrared receiver 1022.

[0104] In this embodiment, the control module 103 includes a control chip such as a single chip microcomputer or an MCU. The control module 103 is disposed on a main circuit board.

[0105] In an optional solution of this embodiment, the data processing unit is also used to amplify the electrical signal and determine whether the amplified electrical signal reaches a preset value. If it is greater than, the electrical signal value is obtained through A / D processing, and the oiliness status of the skin is detected based on the electrical signal value.

[0106] In this solution, the detection of the oiliness of the skin based on the value of the electrical signal is implemented in a skin oiliness detection instrument. For details, please refer to the implementation method of the first embodiment.

[0107] Specifically, the oil state includes the amount of oil; and acquiring and detecting the amount of oil on the skin based on the electrical signal specifically includes:

[0108] The electrical signal is processed by A / D to obtain an electrical signal value, and the amount of oil in the detected skin is obtained based on a quadratic equation of the electrical signal value; the electrical signal value is negatively correlated with the amount of oil.

[0109] or,

[0110] The oil state includes the oil level; obtaining the oil level of the skin based on the electrical signal specifically includes:

[0111] The electrical signal is processed by A / D to obtain an electrical signal value, the electrical signal value is compared with a preset range, and the oil level of the detected skin is obtained according to the range to which the electrical signal belongs.

[0112] Specifically, the grease levels include dry, oil-free, balanced, light, medium, and heavy. The electrical signals corresponding to these levels decrease in descending order. For example, 2.5V or above indicates dry, oil-free, 2.5-2.35 indicates balanced, 2.35-1.9 indicates light, 1.9-1.5 indicates medium, and 1.5V or below indicates heavy.

[0113] In another optional solution of this embodiment, the data processing unit is also used to amplify the electrical signal and determine whether the amplified electrical signal reaches a preset value. If it does, the electrical signal value is obtained through A / D processing and the electrical signal value is sent to an external terminal device.

[0114] That is, the skin oil detection instrument is responsible for collecting the electrical signal value and sending the electrical signal value to the external terminal device, and the oil status of the skin is detected based on the electrical signal value through the external terminal device.

[0115] In this embodiment, the infrared-based skin oil detection instrument further includes an infrared focusing lens 104 disposed between the detection terminal 101 and the infrared module 102 ; the infrared signal emitted by the infrared transmitter 1021 is focused by the infrared focusing lens 104 .

[0116] An infrared focusing lens 104 is provided between the detection terminal 101 and the infrared module 102, so that the divergent infrared light emitted by the infrared emitter 1021 is focused through the infrared focusing lens 104, so that more infrared light is focused on the skin, which can make the detected electrical signal value more obvious and improve the accuracy of the detection result.

[0117] In this embodiment, the infrared-based skin oil detection instrument further includes a switch module 105. Specifically, the switch module 105 is disposed on the housing of the skin oil detection instrument and includes a push button switch or a touch switch. The switch module 105 is connected to the control module 103 and is used to activate the skin oil detection instrument and / or trigger the infrared module 102.

[0118] Specifically, the switch module 105 can be pressed once to turn on the power and trigger the infrared module 102 (start infrared reception and transmission), or it can be pressed once to turn on the power and pressed again to trigger the infrared module 102. The specific settings can be made as needed, and this embodiment does not limit it.

[0119] In this embodiment, the infrared-based skin oil detection instrument further includes a communication module (not shown in the figure); the control module 103 is connected to an external terminal device via the communication module.

[0120] Specifically, for a solution implementing skin oil status detection in a skin oil detection instrument, the detection result can be sent to an external terminal device for display. For a solution implementing skin oil status detection in an external terminal device, the electrical signal value can be sent to the external terminal device. In addition, the communication module can include wired or wireless (such as a WiFi module / Bluetooth module, etc.), and is specifically configured as needed, and this embodiment does not impose any restrictions.

[0121] In this embodiment, the skin oil detection instrument based on infrared technology further includes: a sound prompt module (not shown in the figure); the sound prompt module is connected to the control module 103 to provide voice prompts.

[0122] Specifically, it is possible to prompt whether the detection terminal 101 contacts the skin, and to prompt the detection result.

[0123] In this embodiment, the infrared-based skin oil detection instrument further includes a power supply module 106 connected to the control module 103 for supplying power. The power supply module may include a rechargeable lithium battery for ease of use.

[0124] In this embodiment, the skin oil detection instrument based on infrared technology also includes: an upper cover 107, a detection head 108, a fixing base 109 and a lower shell 110 arranged in sequence; the transmitting terminal 1011 and the receiving terminal 1012 are relatively arranged on the detection head 108; a light source board provided with an infrared transmitter 1021 and an infrared receiver 1022 and a main circuit board provided with a control module 103 are arranged in the lower shell 110 or the fixing base 109.

[0125] The infrared focusing lens 104 and a lens fixing member 111 are further provided between the detection head 108 and the light source board. The lens fixing member 111 is used to fix the infrared focusing lens 104 .

[0126] The infrared-based skin oil detection instrument further includes an indicator light 112 and a light guide 113. The light guide 113 can soften the light of the indicator light 112 and enhance the appearance of the detection pen. The indicator light 112 is disposed on the main circuit board, and the light guide 113 is disposed above the indicator light 112.

[0127] Specifically, the transmitting terminal 1011 and the receiving terminal 1012 are provided on the detection head 108 .

[0128] Specifically, the transmitting terminal 1011 and the receiving terminal 1012 can be plastic electroplated parts or metal parts, as long as they are conductive. In order to make the skin oil detection instrument based on infrared technology more portable, the transmitting terminal 1011 and the receiving terminal 1012 of this embodiment are made of plastic electroplated parts.

[0129] The detection head 108 and the fixing base 109 are disposed within the upper cover 107, which is connected to the lower housing 110 to form a single unit. The upper cover 107 prevents dust from entering the detection head 108 and protects the infrared-based skin oil detection instrument. The upper cover 107 can be removed for testing.

[0130] It should be noted that after the power is turned on, transmitting terminal 1011 sends a signal, and receiving terminal 1012 receives the signal, forming a circuit with the air. Since air is generally non-conductive (occasionally with very weak conductivity), the electrical signal received by control module 103 is 0 or a small value. After contact with the skin, receiving terminal 1012 receives the signal sent by transmitting terminal 1011 (i.e., forming a circuit with human skin, see Figure 7) and outputs a signal to control module 103. Since skin is conductive, after contact with the skin, control module 103 can detect a sudden change in the larger electrical signal value, which can be used to determine whether detection terminal 101 has contacted the skin.

[0131] Example 3

[0132] As shown in Figure 8, a skin oil detection system based on infrared technology includes the skin oil detection instrument 10 based on infrared technology; and also includes an external terminal device 20; the external terminal device 20 is connected to the skin oil detection instrument 10 based on infrared technology, and is used to receive the oil status of the skin and provide prompts.

[0133] In this embodiment, the detection of the oily state of the skin based on the electrical signal value is implemented in the skin oil detection instrument 10, and the skin oil detection instrument 10 sends the detected oily state to the external terminal device 20 for display or voice prompt, etc.

[0134] In this embodiment, the external terminal device 20 includes a mobile phone, IPAD, computer or beauty instrument, etc., and the corresponding APP is installed on the mobile phone, IPAD, computer or beauty instrument. The user sends a detection instruction to the skin oil detection instrument 10 through the APP, and at the same time receives the oil status sent by the skin oil detection instrument 10 and displays the results and information prompts on the APP.

[0135] Specifically, the external terminal device 20 communicates with the skin oil detection instrument 10 through a communication module.

[0136] Example 4

[0137] As shown in Figure 8, a skin oil detection system based on infrared technology includes the skin oil detection instrument 10 based on infrared technology; and also includes an external terminal device 20; the external terminal device 20 is connected to the skin oil detection instrument 10 based on infrared technology, and is used to receive the electrical signal value, and obtain the oil status of the detected skin based on the received electrical signal value and provide a prompt.

[0138] In this embodiment, the detection of the oily state of the skin based on the electrical signal value is implemented in the external terminal device 20 , and the skin oil detection instrument 10 sends the detected electrical signal value to the external terminal device 20 .

[0139] In this embodiment, the external terminal device 20 includes a mobile phone, IPAD, computer or beauty instrument, etc., and the corresponding APP is installed on the mobile phone, IPAD, computer or beauty instrument. The user sends a detection instruction to the skin oil detection instrument 10 through the APP, and at the same time receives the electrical signal value sent by the skin oil detection instrument 10, and obtains the skin oil status after processing by the APP, and displays the result and information prompts, etc.

[0140] Specifically, the external terminal device 20 communicates with the skin oil detection instrument 10 through a communication module.

[0141] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention. Industrial Applicability

[0142] The present invention provides a skin oil detection method, detection instrument and detection system based on infrared technology. Based on the principle of skin absorption and reflection of infrared signals, skin oil detection is performed. The detection speed is fast, the cost is low, the results are accurate, the application range is wide, and there is good industrial applicability.

Claims

1. A skin oil detection method based on infrared technology, characterized in that: include: S101, controlling the emission of infrared signals to the detected skin; S102, controlling the receiving and detecting of the infrared signal reflected by the skin and converting it into an electrical signal; S103, acquiring and detecting the oily state of the skin based on the electrical signal.

2. The skin oil detection method based on infrared technology according to claim 1, characterized in that: The oil state includes the oil amount; acquiring and detecting the oil amount of the skin based on the electrical signal specifically includes: The electrical signal is processed by A / D to obtain an electrical signal value, and the amount of oil on the detected skin is obtained based on a quadratic equation of the electrical signal value; the electrical signal value is negatively correlated with the amount of oil.

3. The skin oil detection method based on infrared technology according to claim 1, characterized in that: The grease state includes grease grade; Acquiring and detecting the oil level of the skin based on the electrical signal specifically includes: The electrical signal is processed by A / D to obtain an electrical signal value, the electrical signal value is compared with a preset range, and the oil level of the detected skin is obtained according to the range to which the electrical signal belongs.

4. The skin oil detection method based on infrared technology according to claim 3 is characterized in that: The grease levels include dryness and lack of oil, water-oil balance, light grease, medium grease and heavy grease; the electrical signals corresponding to dryness and lack of oil, water-oil balance, light grease, medium grease and heavy grease decrease in sequence.

5. The skin oil detection method based on infrared technology according to claim 1, characterized in that: Control receiving and detecting the infrared signal reflected by the skin and converting it into an electrical signal, including: The infrared signal reflected by the skin is received and detected, and converted into a current signal; the current signal is converted into a voltage signal through a voltage-dividing resistor.

6. The skin oil detection method based on infrared technology according to claim 5, characterized in that: After the current signal is converted into a voltage signal through a voltage dividing resistor, the method further includes: amplifying the voltage signal; It is determined whether the voltage signal after the amplification process reaches a preset value. If so, S103 is executed.

7. A skin oil detection instrument based on infrared technology, characterized in that: include: The detection terminal comprises a conductive transmitting terminal and a receiving terminal respectively in contact with the detection skin; The infrared module is arranged inside the skin oil detection instrument, and includes an infrared transmitter and an infrared receiver; the infrared transmitter is used to transmit infrared signals to the detection skin; the infrared receiver is used to receive the infrared signals reflected by the detection skin and convert them into electrical signals; A control module, including an infrared control unit and a data processing unit; The infrared control unit is used to control the on / off of the infrared transmitter and the infrared receiver; the data processing unit is used to receive the electrical signal sent by the infrared receiver.

8. The skin oil detection instrument based on infrared technology according to claim 7, characterized in that: The data processing unit is also used to amplify the electrical signal and determine whether the amplified electrical signal reaches a preset value. If it does, the electrical signal value is obtained through A / D processing, and the oil state of the detected skin is obtained based on the electrical signal value.

9. The skin oil detection instrument based on infrared technology according to claim 7, characterized in that: The data processing unit is also used to amplify the electrical signal and determine whether the amplified electrical signal reaches a preset value. If it does, obtain the electrical signal value through A / D processing and send the electrical signal value to an external terminal device.

10. The skin oil detection instrument based on infrared technology according to claim 7, characterized in that: Also includes: An infrared focusing lens disposed between the detection terminal and the infrared module; The infrared signal emitted by the infrared transmitter is focused by the infrared focusing lens.

11. The skin oil detection instrument based on infrared technology according to claim 7, characterized in that: The skin oil detection instrument based on infrared technology also includes a switch module; the switch module is connected to the control module and is used to start the skin oil detection instrument and / or trigger the infrared module.

12. The skin oil detection instrument based on infrared technology according to claim 7, characterized in that: Also includes: Communication module; The control module is connected to an external terminal device through the communication module.

13. The skin oil detection instrument based on infrared technology according to claim 7, characterized in that: Also includes: Voice prompt module; the voice prompt module is connected to the control module to provide voice prompts.

14. The skin oil detection instrument based on infrared technology according to claim 8, characterized in that: The grease state includes grease quantity and grease grade; the grease grade includes dryness and lack of oil, water-oil balance, light grease, medium grease and heavy grease; the electrical signals corresponding to dryness and lack of oil, water-oil balance, light grease, medium grease and heavy grease decrease in sequence.

15. A skin oil detection system based on infrared technology, characterized in that: It comprises the skin oil detection instrument based on infrared technology as described in claim 7 or 8; and also comprises an external terminal device; the external terminal device is connected to the skin oil detection instrument based on infrared technology, and is used to receive the oil status of the skin and give prompts.

16. A skin oil detection system based on infrared technology, characterized in that: It includes the skin oil detection instrument based on infrared technology as described in claim 7 or 9; and also includes an external terminal device; the external terminal device is connected to the skin oil detection instrument based on infrared technology, and is used to receive the electrical signal value, and obtain the oil status of the detected skin based on the received electrical signal value and give a prompt.

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