An infrared focusing anti-interference blood oxygen saturation sensor

Abstract

This utility model discloses an infrared focusing anti-interference blood oxygen saturation sensor, belonging to the field of medical electronic equipment technology. It includes a probe, a cable, and a plug. The probe comprises an LED chip as the transmitter and a PD chip as the receiver. These two chips are fixed to one surface of a medical non-woven fabric with a spacing of 18.9-25.9 mm and a center line between them. During use, the sensor can be folded along this center line, placing the LED chip and PD chip on opposite sides of the finger. A focusing lens with an aspherical design covers the surfaces of the LED chip and PD chip. A metal shielding layer, composed of a copper-nickel alloy mesh, is embedded within the medical non-woven fabric. This infrared focusing anti-interference blood oxygen saturation sensor is convenient to use, provides accurate and reliable measurement results, and is safe and hygienic. It can meet the needs of people of different ages and is suitable for clinical and home health monitoring scenarios.

Description

Technical Field

[0001] This utility model belongs to the field of medical electronic equipment technology, specifically relating to an infrared focusing anti-interference blood oxygen saturation sensor. Background Technology

[0002] Blood oxygen saturation is one of the key physiological parameters reflecting human health, and it plays an important role in clinical medicine and home health monitoring. Currently, photoelectric blood oxygen saturation meters are widely used, and the blood oxygen saturation sensor is the core component.

[0003] However, traditional pulse oximeter sensors have some significant problems in practical use. On the one hand, their anti-interference ability is weak, and external factors such as light can easily affect the measurement results, leading to inaccurate data, which may in turn affect medical staff's judgment and diagnosis of patients' conditions. On the other hand, some sensors have poor wearing comfort and cannot meet the needs of people of different ages. For example, children have delicate skin and have high requirements for materials and wearing comfort. Utility Model Content

[0004] The purpose of this invention is to provide an infrared focusing anti-interference blood oxygen saturation sensor to solve the problems mentioned in the background art, such as insufficient anti-interference ability and susceptibility to external light and other factors, which lead to inaccurate measurement results.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an infrared focusing anti-interference blood oxygen saturation sensor, comprising a probe, a cable, and a plug. One end of the cable is connected to the plug, and the other end is connected to the probe. The probe includes an LED chip as the transmitting end, a PD chip as the receiving end, and a medical non-woven fabric for fixation. The LED chip and the PD chip are fixed on one surface of the medical non-woven fabric with a spacing of 18.9-25.9 mm. A foldable center line is provided between the LED chip and the PD chip. In use, the sensor is folded along the center line so that the transmitting end and the receiving end are located on opposite sides of the measured area. The surfaces of the LED chip and the PD chip are covered with focusing lenses. A metal shielding layer is embedded in the medical non-woven fabric, and the metal shielding layer is a copper-nickel alloy mesh.

[0006] In a further embodiment, the other side of the medical nonwoven fabric is provided with a double-sided adhesive inner paper, and the double-sided adhesive inner paper is covered with transparent release paper.

[0007] In a further embodiment, the condensing lens is an aspherical design with a focal length that matches the distance between the transmitting and receiving ends, and an annular light shield is provided around the condensing lens.

[0008] In a further embodiment, the LED chip includes red light-emitting diodes and infrared light-emitting diodes, which are arranged in an array.

[0009] In a further embodiment, the centerline incorporates a shape memory alloy hinge that can automatically adjust the spacing within a pressure range of 0.1-5N.

[0010] In a further embodiment, the medical nonwoven fabric is made of a breathable and skin-friendly material, and the inner paper of the double-sided adhesive is made of medical pressure-sensitive adhesive.

[0011] In a further embodiment, the LED chip and PD chip are attached to the surface of non-woven fabric with conductive silver paste, and the encapsulation thickness is ≤1.5mm.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] This infrared focusing anti-interference blood oxygen saturation sensor effectively improves anti-interference capabilities by setting a metal shielding layer, a ring-shaped light shield, and an optimized focusing lens design, making the measurement results more accurate and reliable. The metal shielding layer can shield external electromagnetic interference, the ring-shaped light shield can block external stray light, and the focusing lens can focus the emitted light, improve the light transmission efficiency, and reduce the interference of external factors on the measurement signal.

[0014] Made with breathable and skin-friendly medical non-woven fabric and medical pressure-sensitive adhesive, as well as shape memory alloy hinges that can automatically adjust the spacing, it improves wearing comfort and safety, meets the needs of people of different ages. The breathable and skin-friendly material can avoid skin allergies, the medical pressure-sensitive adhesive is firmly attached and has little skin irritation, and the shape memory alloy hinge can automatically adjust the spacing according to the finger thickness of different people to ensure measurement stability.

[0015] Its slim design and convenient mounting method make it suitable for various scenarios such as clinical and home health monitoring. It is easy to use, safe and hygienic. This infrared focusing anti-interference blood oxygen saturation sensor is easy to use, provides accurate and reliable measurement results, and is safe and hygienic. It can meet the needs of people of different ages and is suitable for clinical and home health monitoring scenarios. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an exploded view of the PD chip and the focusing lens of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention with its foldable center line cut open.

[0020] Figure 4 This is a schematic diagram of the structure of the medical nonwoven fabric of this utility model in a cut-open state;

[0021] Figure 5 This is a schematic diagram of the structure of the double-sided adhesive inner paper of this utility model.

[0022] In the diagram: 1. Probe; 2. Cable; 3. Plug; 4. Medical non-woven fabric; 5. LED chip; 6. PD chip; 7. Foldable center line; 8. Double-sided adhesive inner paper; 9. Red light-emitting tube; 10. Infrared light-emitting tube; 11. Focusing lens; 12. Ring-shaped light shield; 13. Shape memory alloy hinge; 14. Metal shielding layer; 15. Transparent release paper. Detailed Implementation

[0023] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0024] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0025] This utility model provides, for example Figure 1-5 The infrared focusing anti-interference blood oxygen saturation sensor shown includes a probe 1, a cable 2, and a plug 3. The cable 2 connects the plug 3 to the probe 1 to ensure stable signal transmission. The probe 1 is the core component, which includes a transmitter LED chip 5, a receiver PD chip 6, and medical non-woven fabric 4. The LED chip 5 and PD chip 6 are fixed on the same side of the medical non-woven fabric 4 with a spacing of 18.9-25.9mm. A foldable center line 7 is provided between them. When in use, the sensor is folded along this line so that the transmitter and receiver are located on both sides of the finger, ensuring that the light passes smoothly through the tissue being measured.

[0026] The medical nonwoven fabric 4 plays multiple key roles. First, it is made of breathable and skin-friendly material, which greatly improves wearing comfort and is especially suitable for people of different ages to use for a long time, reducing the risk of skin allergies. Second, the medical nonwoven fabric 4 has a copper-nickel alloy mesh embedded in the metal shielding layer 14, which can effectively shield external electromagnetic interference and ensure the stability and accuracy of the measurement signal. Third, the double-sided adhesive inner paper 8 on the other side of the medical nonwoven fabric 4 is made of medical pressure-sensitive adhesive and covered with transparent release paper 15. When using it, peeling off the release paper 15 can easily and firmly fix the probe 1 to the measurement site, and the pasting process is less irritating to the skin and meets hygiene standards.

[0027] The internal structure of the LED chip 5 is carefully designed, including a red light-emitting tube 9 and an infrared light-emitting tube 10, which are arranged in an array. This arrangement can enhance the intensity and uniformity of light emission, providing a stable light source for accurate measurement. The condenser lens 11 covering the surface of the LED chip 5 is an aspherical design, and its focal length is precisely matched with the distance between the emitting end and the receiving end. The condenser lens 11 is also surrounded by a ring-shaped light shield 12. The condenser lens 11 focuses the emitted light and improves the light transmission efficiency, while the ring-shaped light shield 12 blocks external stray light interference, further improving the accuracy of measurement.

[0028] The foldable centerline 7 has a built-in shape memory alloy hinge 13 that can automatically adjust the spacing within a pressure range of 0.1-5N. This design can automatically adapt to the finger thickness of different people, which not only ensures the stability of the measurement process, but also avoids the measurement results being affected by being too tight or too loose, greatly improving the applicability of the sensor.

[0029] In actual operation, first peel off the transparent release paper 15, fix the probe 1 to the finger or other part to be measured by the double-sided adhesive inner paper 8, fold the probe 1 along the foldable center line 7 so that the LED chip 5 and PD chip 6 are located on both sides of the finger. After the measurement is started, the red light-emitting tube 9 and the infrared light-emitting tube 10 in the LED chip 5 emit light. The light passes through the finger tissue and is received by the PD chip 6. During this process, the focusing lens 11 focuses the light, the ring light shield 12 blocks stray light, and the metal shielding layer 14 resists electromagnetic interference. The three work together to ensure the accuracy of the measurement signal. The measurement circuit processes the received light signal, calculates the blood oxygen saturation value, and transmits the data to the display device, such as a monitor or mobile APP, through the cable 2 for medical staff or users to view.

[0030] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The control method of this utility model is through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Working principle:

[0033] This infrared focusing anti-interference blood oxygen saturation sensor first peels off the transparent release paper 15, and fixes the probe 1 to the measured area (such as a finger) with the double-sided adhesive inner paper 8. Fold along the foldable center line 7 so that the LED chip 5 and PD chip 6 are located on both sides of the finger. The red light-emitting tube 9 and infrared light-emitting tube 10 in the LED chip 5 emit light. After the light passes through the tissue of the measured area, it is received by the PD chip 6. The focusing lens 11 focuses the emitted light to improve the light transmission efficiency. The ring light shield 12 blocks external stray light interference, and the metal shielding layer 14 prevents external electromagnetic interference to ensure the accuracy of the measurement signal. The measurement circuit calculates the blood oxygen saturation value based on the received light signal and transmits it to the display device (such as a monitor, mobile APP, etc.) for display through the cable 2.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An infrared light-accumulating anti-interference oximetry sensor comprising a probe (1), a cable (2) and a plug (3), characterized in that: One end of the cable (2) is connected to the plug (3), and the other end is connected to the probe (1). The probe (1) includes an LED chip (5) as the transmitting end and a PD chip (6) as the receiving end, as well as a medical non-woven fabric (4) for fixing. The LED chip (5) and the PD chip (6) are fixed on one side of the medical non-woven fabric (4) with a spacing of 18.9-25.9mm. A foldable intermediate line (7) is provided between the LED chip (5) and the PD chip (6). When in use, the foldable intermediate line (7) is folded so that the transmitting end and the receiving end are located on both sides of the part being measured. The surfaces of the LED chip (5) and the PD chip (6) are covered with a focusing lens (11). A metal shielding layer (14) is embedded in the medical non-woven fabric (4). The metal shielding layer (14) is a copper-nickel alloy mesh.

2. The infrared focusing anti-interference blood oxygen saturation sensor according to claim 1, characterized in that: The other side of the medical nonwoven fabric (4) is provided with double-sided adhesive inner paper (8), and the double-sided adhesive inner paper (8) is covered with transparent release paper (15).

3. The infrared focusing anti-interference blood oxygen saturation sensor according to claim 1, characterized in that: The condenser lens (11) is an aspherical design with a focal length that matches the distance between the transmitter and receiver. A ring-shaped light shield (12) is provided around the condenser lens (11).

4. The infrared focusing anti-interference blood oxygen saturation sensor according to claim 1, characterized in that: The LED chip (5) includes a red light-emitting tube (9) and an infrared light-emitting tube (10), which are arranged in an array.

5. The infrared focusing anti-interference blood oxygen saturation sensor according to claim 1, characterized in that: The foldable center line (7) has a built-in shape memory alloy hinge (13) that can automatically adjust the spacing within a pressure range of 0.1-5N.

6. The infrared focusing anti-interference blood oxygen saturation sensor according to claim 2, characterized in that: The medical nonwoven fabric (4) is made of breathable and skin-friendly material, and the double-sided adhesive inner paper (8) is made of medical pressure-sensitive adhesive.

7. The infrared focusing anti-interference blood oxygen saturation sensor according to claim 1, characterized in that: The LED chip (5) and PD chip (6) are attached to the surface of non-woven fabric (4) with conductive silver paste, and the encapsulation thickness is ≤1.5mm.

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