Blood oxygen detection device

Abstract

The present invention relates to the technical field of measuring blood characteristics, and specifically to a blood oxygen detection device, comprising a power supply; a transmitting module for transmitting detection light waves into the skin; a measuring module for receiving the detection light waves; a pressure module for applying pressure to the subject's skin and causing it to rebound and reset; a camera for collecting video information of the pressed area of ​​the subject's skin when the pressure module is activated; and a control module for acquiring the video information and using an inter-frame difference method to determine the time points when the subject's skin is compressed and rebounds, obtaining the rebound time after the skin is compressed and performing interval judgment, and adjusting the light wave intensity according to the different intervals in which the rebound time falls. Compared with traditional solutions, the present invention solves the problem of individual differences affecting the accuracy of blood oxygen detection while ensuring the maximum battery life of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring blood characteristics, and in particular to a blood oxygen detection device. Background Art

[0002] Blood oxygen, in simple terms, refers to the amount of oxygen in the blood. The normal oxygen content in the human body is around 90%. The higher the oxygen content in the blood, the better the metabolism. Too low a level can lead to insufficient oxygen supply to the body. Because all cells in the body require oxygen, abnormal blood oxygen levels can affect most bodily functions. Therefore, blood oxygen saturation testing is widely used in clinical settings such as internal medicine, surgery, and intensive care units.

[0003] Oxygen is essential for human survival. From the moment we breathe in air, it's transported through our bloodstream to various organs. Of course, oxygen also needs transportation: hemoglobin, a protein within red blood cells responsible for transporting oxygen. One hemoglobin (the angular, thread-like structure) can carry four oxygen molecules (blue); at this point, the "fully loaded" hemoglobin is called oxygen-saturated hemoglobin.

[0004] When hemoglobin is fully loaded with four oxygen molecules, its color will be brighter red. When the oxygen molecules "get off the bus", the hemoglobin becomes a little dimmer. This color difference is also reflected in the reflectivity of the two light sources, infrared and infrared light. Because oxygen-saturated hemoglobin is reddish, when it is irradiated with red light, its reflectivity of red light is higher, while its reflectivity of infrared light is lower; conversely, when hemoglobin is insufficiently oxygenated, its reflectivity of red light is lower, while its reflectivity of infrared light is higher. By analyzing the different reflectivities of these two light sources and calculating the proportion of oxygen-saturated hemoglobin in all hemoglobin, the blood oxygen saturation can be obtained.

[0005] A typical oximeter sensor consists of a pair of LEDs, which are positioned directly opposite a photodiode through a translucent part of the patient's body (usually a fingertip or earlobe). One LED emits red light at a wavelength of 660nm; the other emits infrared light at a wavelength of 940nm. The blood oxygen percentage is calculated by measuring the different absorption rates of these two wavelengths of light as they pass through the body.

[0006] The light source of existing blood oxygen saturation detection devices is generally a point light source, so only part of the light is involved in the detection, the light intensity is low, resulting in a weak signal, which increases the complexity of the detection device and the complexity of subsequent processing.

[0007] For example, in the invention document of Chinese patent publication No. CN105559795B, a wearable blood oxygen detection device and its blood oxygen sensor are described. The blood oxygen sensor includes: a light-emitting device, arranged on a chip substrate, for emitting detection light waves into the tissue to be measured; a first light-guiding device, arranged on the light-emitting device, for reflecting the detection light waves into the tissue to be measured; a detection device, arranged on the chip substrate, for measuring the detection light waves reflected from the tissue to be measured and within a detection range; and a second light-guiding device, for reflecting the detection light waves outside the detection range and measuring them by the detection device.

[0008] This invention arranges a first light-guiding device on the light-emitting device so that the detection light wave changes from vertical incidence to oblique incidence after reflection, which facilitates reflection in the tissue to be tested; and arranges a second light-guiding device on the detection device so that more detection light waves can be measured by the detection device after reflection, thereby improving the utilization rate of the detection light waves.

[0009] However, when this invention encounters individual differences, such as when the subject's skin is locally too thick or hard, the detection data will have significant errors because the effect of the detection light wave penetrating the skin will be weakened. However, if only the intensity of the detection light wave is increased, then the detection data of some subjects (easy to detect) will be biased, and the power consumption will also be high, seriously affecting the battery life and service life of the equipment. Therefore, there is a need for a device that can solve the problem of individual differences affecting the accuracy of blood oxygen detection. Summary of the Invention

[0010] The present invention provides a blood oxygen detection device, the purpose of which is to solve the problem that individual differences affect the accuracy of blood oxygen detection.

[0011] In order to achieve the above objectives, this solution provides the following technical solutions:

[0012] A blood oxygen detection device, comprising:

[0013] power supply;

[0014] A transmitting module, which is used to transmit detection light waves into the skin;

[0015] A measurement module, which is used to receive detection light waves;

[0016] Also includes:

[0017] A pressure module is used to apply pressure to the subject's skin and rebound to reset;

[0018] A camera is used to collect video information of the pressure-applying part of the subject's skin when the pressure-applying module is activated;

[0019] A control module is used to obtain video information and use the inter-frame difference method to determine the time points when the subject's skin is compressed and rebounded, obtain the rebound time after the skin is compressed, and perform interval judgment. When the rebound time is in the first interval, the light wave intensity is adjusted to 80%-90% of the preset value; when the rebound time is in the second interval, the light wave intensity is adjusted to the preset value; when the rebound interval is in the third interval, the light wave intensity is adjusted to 110%-120% of the preset value;

[0020] The power supply is electrically connected to the control module.

[0021] The principle and beneficial technical effects of this technical solution:

[0022] Because it includes a pressure module, a camera and a control module, the pressure module is used to apply pressure to the subject's skin and rebound to reset, the camera is used to collect video information of the subject's skin where pressure is applied when the pressure module is started, and the control module is used to obtain video information and use the inter-frame difference method to determine the time points when the subject's skin is compressed and rebounded, to obtain the rebound time after the skin is compressed and to perform interval judgment.

[0023] Because the pressure module applies pressure and rebounds to the subject's skin, the blood in the pressed part of the subject moves to both sides when the pressure is applied. After the pressure part is reset, the capillaries in the pressed part of the subject are refilled, and a large amount of blood moves there, driving more hemoglobin to flow through the pressed part, which is conducive to the collection of more samples and improves the accuracy of blood oxygen detection data.

[0024] When the rebound time is in the first interval, the light wave intensity is adjusted to 80%-90% of the preset value; when the rebound time is in the second interval, the light wave intensity is adjusted to the preset value; when the rebound interval is in the third interval, the light wave intensity is adjusted to 110%-120% of the preset value. Therefore, before the subject measures blood oxygen, the device will conduct a preliminary inspection and judgment of the subject's skin elasticity and condition based on the rebound time after the skin is compressed. When the rebound time is in the first interval, the light wave intensity is adjusted to 80%-90% of the preset value; when the rebound time is in the second interval, the light wave intensity is adjusted to the preset value; when the rebound interval is in the third interval, the light wave intensity is adjusted to 110%-120% of the preset value. Therefore, when the skin conditions of the subjects are different, for subjects with fast skin rebound, reducing the intensity of the detection light wave is beneficial to saving energy consumption and improving endurance. For subjects with high skin hardness and slow rebound, increasing the intensity of the detection light wave is conducive to penetrating the skin and avoiding affecting the accuracy of the detection data.

[0025] Because it includes a transmitting module and a measuring module, the transmitting module is used to transmit detection light waves into the skin, and the measuring module is used to measure the detection light waves, so light of appropriate intensity enters the skin after being emitted, and accurate data collection can be achieved through light reflection.

[0026] Because the power supply is electrically connected to the control module, the power supply can supply power to the control module.

[0027] This solution uses a pressure module and camera to test and record the subject's skin condition, increasing the amount of hemoglobin sampled at the pressure site and improving the accuracy of blood oxygen measurement data. The control module then uses logic to classify the time it takes for the subject's skin to rebound. For subjects with fast-rebounding skin, the intensity of the detection light wave is reduced to save energy and improve battery life. For subjects with hard, slow-rebounding skin, the intensity of the detection light wave is increased to facilitate skin penetration and avoid affecting the accuracy of the measurement data.

[0028] Furthermore, it also includes a data storage module, which is used to store the detection information of the subject and a plurality of pictures of different skin colors.

[0029] Beneficial effect: The test information of the test subject can be saved.

[0030] Furthermore, it also includes a speaker. The control module can be used to obtain the picture from the camera and compare it with several skin pictures of different skin colors in the data storage module. When it is determined that the similarity between the subject's skin and the existing pictures is lower than a threshold, the speaker is activated to alert the subject.

[0031] Beneficial effect: Prevent dyes on the subject's hands from affecting normal blood oxygen detection. For example, if the subject's fingers are painted with nail polish, paint, dirt, etc., the device can immediately sound an alarm to alert the subject so that the skin at the detection site can be cleaned for accurate blood oxygen detection.

[0032] Furthermore, it also includes a light sensor and a light emitting diode. The light sensor, light emitting diode and control module are electrically connected. The light sensor is used to obtain the ambient light intensity to obtain light intensity information. The control module obtains the light intensity information at the light sensor. When the light intensity information is greater than a threshold, the control module transmits an open signal to the light emitting diode. After receiving the open signal, the light emitting diode emits light to alert the subject.

[0033] Beneficial Effects: Ambient light, which isn't generated by the transmitter, can affect the intensity of light received by the measurement module, directly affecting the intensity of the photocurrent that reflects the characteristics of the medium. To improve measurement accuracy, reducing ambient light intensity is necessary. The light sensor detects ambient light intensity. When the ambient light is too strong, the controller turns on the LED to alert the test subject, improving detection accuracy.

[0034] Furthermore, it also includes a transmission module, which is used to transmit information to a designated server.

[0035] Beneficial effect: The test information of the subjects is uploaded to the server for subsequent data storage and processing.

[0036] Furthermore, it also includes a storage box for storing the control module and the data storage module.

[0037] Beneficial effect: After storage, the appearance is neater and cleaner.

[0038] Furthermore, the pressure module includes a finger clamp, an electromagnet and a metal plate. The finger clamp is a small square box with a finger hole on the side. The finger hole is used to place the subject's finger. The electromagnet is slidably connected below the finger hole, and the metal plate is fixedly connected above the finger hole.

[0039] Beneficial effects: low cost, good pressure effect, pressure can be freely adjusted, the electromagnet can automatically reset after power failure, and no additional energy is required.

[0040] Furthermore, the finger clamp is made of ABS material.

[0041] Beneficial effects: ABS material has good rigidity, hardness and impact resistance, and is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a logic diagram of embodiment 1 of the present invention;

[0043] Figure 2 A partial cross-sectional view of the right side of the pressure module of the present invention;

[0044] Figure 3 This is a three-dimensional view of the pressure module of the present invention. DETAILED DESCRIPTION

[0045] The following is a further detailed description through specific implementation methods:

[0046] The symbols in the drawings of the specification include: 1. small square box; 2. metal plate; 3. electromagnet.

[0047] Example 1 is as follows:

[0048] A blood oxygen detection device, comprising:

[0049] Power supply: The power supply can be used to supply power to all modules that require electricity, saving the cost of energy equipment;

[0050] The transmitting module includes a red LED with a wavelength of 660nm and an infrared LED with a wavelength of 910nm, which are used to transmit detection light waves into the skin;

[0051] The measuring module adopts an optical receiver for receiving detection light waves;

[0052] Also includes:

[0053] A pressure module is used to apply pressure to the subject's skin and rebound to reset;

[0054] A camera is used to collect video information of the pressure-applying part of the subject's skin when the pressure-applying module is activated;

[0055] A control module is used to obtain video information and use an inter-frame difference method to determine the time points when the subject's skin is compressed and rebounded, obtain the rebound time after the skin is compressed, and perform interval judgment. When the rebound time is in the first interval, the light wave intensity is adjusted to 85% of the preset value; when the rebound time is in the second interval, the light wave intensity is adjusted to the preset value; when the rebound interval is in the third interval, the light wave intensity is adjusted to 115% of the preset value;

[0056] The pressure module adopts an electromagnet 3 and a metal plate 2, including a finger clamp, an electromagnet 3 and a metal plate 2. The finger clamp is a small square box 1 with a square finger hole on the side. The finger hole is used to place the subject's finger. The electromagnet 3 is slidably connected to the groove on the lower wall of the small square box 1, and the metal plate 2 is screwed to the upper wall of the small square box 1.

[0057] The small square box is made of ABS material, which has good rigidity, hardness and impact resistance and low cost.

[0058] When the electromagnet 3 is energized, the camera is also energized to take pictures of the subject's skin.

[0059] During specific use, the subject, Xiao Ming, a first-grade student, puts his finger into the finger hole in the small square box 1. The pressure module is activated and the electromagnet 3 is energized. Due to its magnetic properties, the electromagnet 3 moves toward the side of the metal plate 2 and squeezes Xiao Ming's finger with a force of 10N. After the power is turned off for 1 second, the electromagnet 3 is no longer magnetic and Xiao Ming's finger is no longer squeezed.

[0060] While electromagnet 3 is energized, the camera captures video footage of Xiao Ming's finger being squeezed. The control module, which utilizes an Intel i5-8279U processor and its components, acquires the video footage from the camera and uses inter-frame differencing to determine the time points at which the subject's skin is compressed and rebounds. This determines the rebound time after compression and then determines the intervals. If the rebound time falls within the first interval, the light intensity is adjusted to 85% of the preset value. Of course, if the subject is a normal middle-aged adult, the rebound time falls within the second interval, and the light intensity is adjusted to the preset value. If the subject is a construction worker with tough skin, the rebound time falls within the third interval, and the light intensity is adjusted to 115% of the preset value. The light intensity can be adjusted appropriately based on the elasticity of the subject's skin.

[0061] The transmitting module includes a red light LED with a wavelength of 660nm and an infrared LED with a wavelength of 910nm. After the intensity is determined, the detection light wave is emitted into the skin of Xiao Ming's finger. After reflection, the measurement module receives the detection light wave and accurately detects the blood oxygen level of Xiao Ming's finger.

[0062] Compared to traditional solutions, this solution uses a pressure module and camera to test and record the subject's skin condition, increasing the amount of hemoglobin sampled at the pressure site and improving the accuracy of blood oxygen measurement data. The control module then uses logic to classify the time it takes for the subject's skin to rebound. For subjects with fast skin rebound, the intensity of the detection light wave is reduced to save energy and improve battery life. For subjects with hard skin and slow rebound, the intensity of the detection light wave is increased to facilitate skin penetration and avoid affecting the accuracy of the test data.

[0063] Example 2

[0064] The difference from Example 1 is that it further includes a data storage module, which is used to store the detection information of the subject and a number of pictures with different skin colors.

[0065] It also includes a speaker. The control module can be used to obtain the image from the camera and compare it with 300 skin images of different skin colors in the data storage module (the correspondence between skin images and the optimal light-emitting diode power). When it is judged that the similarity between the subject's skin and all images is less than 95%, the speaker is activated to alert the subject and clean the dye, dirt, nail polish and other substances that affect the detection accuracy on the skin.

[0066] It also includes a light sensor and a light-emitting diode. The light sensor, the light-emitting diode and the control module are electrically connected. The light sensor is used to detect the ambient light intensity. The control module obtains light intensity information. The control module is used to determine whether the light intensity information is greater than 50 Lux. When the light intensity information is greater than 50 Lux, the control module transmits an open signal to the light-emitting diode. After receiving the open signal, the light-emitting diode emits light to alert the subject.

[0067] It also includes a transmission module, which is used to transmit information to a designated server.

[0068] It also includes a display module, which is connected to the control module and is used to display the detected values.

[0069] During specific use, the subject, Xiao Ming, a first-grade student, puts his finger on the test area of ​​the device. The camera collects image information of Xiao Ming's skin, which is used to input operation instructions to the control module. When the control module determines that the similarity values ​​of the subject's skin image and the existing 300 common pictures of different skin colors in the data storage module are all lower than 95%, it determines that the subject's skin is stained with substances that affect the detection accuracy. The control module turns on the speaker to prompt the subject to clean the skin to improve the detection effect.

[0070] Excessive ambient light intensity will affect the received light intensity of the measurement module, thereby affecting the blood oxygen detection effect. Therefore, the light sensor obtains the ambient light intensity, and the control module obtains the ambient light intensity from the light sensor. When it is determined that the ambient light intensity is too high, the light-emitting diode is activated to realize the function of warning Xiao Ming.

[0071] The data storage module can store Xiao Ming's blood oxygen detection information and 300 common pictures of different skin colors.

[0072] The transmission module uploads Xiao Ming's blood oxygen test information to the server, facilitating subsequent storage and processing of the blood oxygen test data. The display module is connected to the control module to visualize Xiao Ming's test data, improving the overall user experience.

[0073] It also includes a storage box for storing the control module, transmission module and data module, which improves the overall portability and aesthetics.

[0074] The above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A blood oxygen detection device, comprising: power supply; A transmitting module, which is used to transmit detection light waves into the skin; A measurement module, which is used to receive detection light waves; It is characterized by further comprising: A pressure module is used to apply pressure to the subject's skin and rebound to reset; A camera is used to collect video information of the pressure-applying part of the subject's skin when the pressure-applying module is activated; A control module is used to obtain video information and use the inter-frame difference method to determine the time points when the subject's skin is compressed and rebounded, obtain the rebound time after the skin is compressed, and perform interval judgment. When the rebound time is in the first interval, the light wave intensity is adjusted to 80%-90% of the preset value; when the rebound time is in the second interval, the light wave intensity is adjusted to the preset value; when the rebound interval is in the third interval, the light wave intensity is adjusted to 110%-120% of the preset value; The power supply is electrically connected to the control module.

2. The blood oxygen detection device according to claim 1, wherein: The invention also comprises a data storage module, wherein the data storage module is used to store the detection information of the subject and a plurality of pictures of different skin colors.

3. The blood oxygen detection device according to claim 2, wherein: It also includes a speaker. The control module can be used to obtain the image from the camera and compare it with several skin pictures of different skin colors in the data storage module. When it is determined that the similarity between the subject's skin and the existing pictures is lower than a threshold, the speaker is activated to alert the subject.

4. The blood oxygen detection device according to claim 1, wherein: It also includes a light sensor and a light emitting diode, which are electrically connected to the light sensor, the light emitting diode and the control module. The light sensor is used to obtain the ambient light intensity to obtain light intensity information, and the control module obtains the light intensity information at the light sensor. When the light intensity information is greater than a threshold, the control module transmits an open signal to the light emitting diode, and the light emitting diode emits light to alert the subject after receiving the open signal.

5. The blood oxygen detection device according to claim 4, characterized in that: It also includes a transmission module, which is used to transmit information to a designated server.

6. The blood oxygen detection device according to claim 1, wherein: Also included is a storage box for storing the control module and the data storage module.

7. The blood oxygen detection device according to claim 1, wherein: The pressure module includes a finger clamp, an electromagnet and a metal plate. The finger clamp is a small square box with a finger hole on the side. The finger hole is used to place the subject's finger. The electromagnet is slidably connected to the groove on the lower wall of the small square box, and the metal plate is fixedly connected to the upper wall of the small square box.

8. The blood oxygen detection device according to claim 7, characterized in that: The finger clip is made of ABS material.

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