Detection device and glucometer

Abstract

The invention relates to the technical field of blood glucose detection, and discloses a detection device and a glucometer, the detection device comprises a substrate, a laser, a first lens, a photosensitive element and a second lens, the laser is arranged on the substrate, the laser is used for emitting laser, the emitting direction of the laser is inclined to the substrate, the first lens is arranged on the light emitting side of the laser, and the photosensitive element is arranged on the second lens. The first lens is used for receiving laser emitted by the laser and converging the laser to a target object, the target object is used for receiving the laser and emitting light, the light comprises the laser and Raman scattering light, the photosensitive element is arranged on the substrate, the photosensitive element and the laser are located on the same side of the substrate, and the second lens is arranged on the side, away from the substrate, of the photosensitive element. The second lens is used for receiving light emitted by the target object and converging the light to the photosensitive element. According to the detection device and the glucometer, the light path of the detection device is simple, the structure of the detection device is simple, and the overall size is small.

Description

Technical Field

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

[0002] High blood sugar (glucose in the blood) levels can cause various acute and long-term complications, such as kidney disease, nervous and circulatory system diseases, cardiovascular disease, blindness, stroke, etc. In related technologies, blood sugar testing includes three methods: invasive, minimally invasive, and non-invasive. Among them, invasive and minimally invasive methods can cause pain and discomfort to patients, and are accompanied by potential risks such as infection.

[0003] Based on this, the existing blood sugar test mainly promotes non-invasive methods, using Raman spectroscopy to perform non-destructive testing of human blood sugar. Laser is used to irradiate the patient's skin to generate Raman scattered light, and a photosensitive element is used to receive the Raman scattered light, thereby achieving blood sugar testing.

[0004] However, the optical path of the existing detection device is relatively complex, the structure of the detection device is relatively complex, and the overall volume is relatively large. Summary of the invention

[0005] The embodiments of the present invention disclose a detection device and a blood glucose meter. The optical path of the detection device is relatively simple, the structure of the detection device is relatively simple, and the overall volume is relatively small.

[0006] In the first aspect, an embodiment of the present invention discloses a detection device, including a substrate, a laser, a first lens, a photosensitive element and a second lens, wherein the laser is disposed on the substrate, the laser is used to emit laser light, and the emission direction of the laser light is inclined to the substrate, the first lens is disposed on the light emitting side of the laser, the first lens is used to receive the laser light emitted by the laser and converge the laser light to a target object, the target object is used to receive the laser light and emit light, the light light includes the laser light and Raman scattered light, the photosensitive element is disposed on the substrate, the photosensitive element and the laser are located on the same side of the substrate, the second lens is disposed on the side of the photosensitive element away from the substrate, the second lens is used to receive the light light emitted by the target object and converge the light light to the photosensitive element.

[0007] As an optional implementation, in an embodiment of the present invention, the detection device also includes a mounting member, which is disposed on the substrate, and the mounting member has an inclined surface, which is inclined to the substrate, and the laser is disposed on the inclined surface, and the emission direction of the laser is perpendicular to the inclined surface.

[0008] As an optional implementation, in an embodiment of the present invention, the angle between the inclined surface and the substrate is α, 30°≤α≤75°.

[0009] As an optional implementation, in an embodiment of the present invention, the angle between the incident direction of the laser beam converging to the target object and the target object is θ, and 15°≤θ≤60°.

[0010] As an optional implementation, in an embodiment of the present invention, the detection device further includes a narrowband filter, and the narrowband filter is arranged between the laser and the first lens.

[0011] As an optional implementation, in an embodiment of the present invention, the light also includes Rayleigh scattered light, and the detection device also includes a notch filter, wherein the notch filter is arranged between the second lens and the photosensitive element, and the notch filter is used to filter the laser and the Rayleigh scattered light in the light, and to transmit the Raman scattered light to the photosensitive element.

[0012] As an optional implementation, in an embodiment of the present invention, the detection device further includes a bandpass filter, and the bandpass filter is arranged between the second lens and the photosensitive element.

[0013] As an optional implementation, in an embodiment of the present invention, the detection device also includes a plurality of the photosensitive elements and a plurality of the bandpass filters, the plurality of the photosensitive elements are arranged at intervals on the substrate, the central wavelengths of the plurality of the bandpass filters are different, and the plurality of the bandpass filters are arranged corresponding to the plurality of the photosensitive elements one by one.

[0014] As an optional implementation, in an embodiment of the present invention, the first lens includes one of a Fresnel lens, a diffractive lens, and a super lens, and the second lens includes one of a Fresnel lens, a diffractive lens, and a super lens.

[0015] In a second aspect, an embodiment of the present invention discloses a blood glucose meter, comprising the detection device of the first aspect.

[0016] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects:

[0017] In the embodiment of the present invention, a laser is arranged on a substrate, the laser can emit laser light, and the emission direction of the laser light is inclined to the substrate, and the laser light is focused to the target object by using a first lens, so that the target object can emit light to the second lens after receiving the laser light, and the light light is focused to the photosensitive element arranged on the substrate by the second lens, so that the photosensitive element can receive Raman scattered light in the light light, thereby realizing blood sugar detection. In addition, the emission direction of the laser light emitted by the laser is inclined to the substrate, and after the laser light is focused to the target object by the first lens, the light emitted by the target object can be projected to the second lens, and then focused to the photosensitive element by the second lens, the optical path of the detection device is relatively simple, the structure of the detection device is relatively simple, and the overall volume is relatively small. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this technical field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic diagram of the structure of a detection device disclosed in Embodiment 1 of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of a blood glucose meter disclosed in Embodiment 2 of the present invention.

[0021] Description of main reference numerals

[0022] 100. Detection device; 10. Substrate; 11. Laser; 12. First lens; 13. Photosensitive element; 14. Second lens; 15. Mounting piece; 15a. Inclined surface; 16. Narrowband filter; 17. Notch filter; 18. Bandpass filter; 200. Blood glucose meter; a. Target object. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0025] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0028] The invention discloses a detection device and a blood glucose meter. The optical path of the detection device is relatively simple, the structure of the detection device is relatively simple, and the overall volume is relatively small.

[0029] Embodiment 1

[0030] See also Figure 1, is a schematic structural diagram of a detection device 100 provided in Embodiment 1 of the present invention, the detection device 100 comprises a substrate 10, a laser 11, a first lens 12, a photosensitive element 13 and a second lens 14, the laser 11 is arranged on the substrate 10, the laser 11 is used to emit laser light, the emission direction of the laser light is inclined to the substrate 10, the first lens 12 is arranged on the light emitting side of the laser 11, the first lens 12 is used to receive the laser light emitted by the laser 11, and converge the laser light to the target object, the target object is used to receive the laser light and emit light, the light includes laser light and Raman scattered light, the photosensitive element 13 is arranged on the substrate 10, the photosensitive element 13 and the laser 11 are located on the same side of the substrate 10, the second lens 14 is arranged on the side of the photosensitive element 13 away from the substrate 10, the second lens 14 is used to receive the light emitted by the target object, and converge the light to the photosensitive element 13.

[0031] The target object a may be the user's skin. The laser is emitted to the user's skin by the laser. After the laser reaches the surface of the user's skin, it will be absorbed, reflected, and scattered by the skin components. The reflection includes the laser emitted by the laser, and the scattering includes Rayleigh scattered light and Raman scattered light. Figure 1 In the figure, the dotted line with arrows is used to represent the optical path of the detection device 100.

[0032] Exemplarily, the photosensitive element 13 may be an APD (Avalanche Photon Diode) sensor or a SPAD (Single Photon Avalanche Diode) sensor. In this embodiment, the photosensitive element 13 may be an APD as an example.

[0033] In this embodiment, a laser 11 is arranged on a substrate 10. The laser 11 can emit laser light, and the emission direction of the laser light is inclined to the substrate 10. The laser light is focused to the target object by the first lens 12. In this way, after receiving the laser light, the target object can emit light to the second lens 14. The second lens 14 converges the light to the photosensitive element 13 arranged on the substrate 10, so that the photosensitive element 13 can receive Raman scattered light in the light, thereby realizing blood sugar detection. In addition, the detection device 100 in the related art needs to use multiple reflectors to assist in changing the path of light, so that the laser light emitted by the laser 11 can be reflected to the target object through the reflector, and the light emitted by the target object can be reflected to the photosensitive element 13 through the reflector. The optical path of the detection device 100 is relatively complex, and the arrangement of multiple reflectors causes the structure of the detection device 100 to be relatively complex and the overall volume to be relatively large. In this embodiment, the emission direction of the laser emitted by the laser 11 is inclined to the substrate 10. After the laser is converged to the target object through the first lens 12, the light emitted by the target object can be emitted to the second lens 14, and then converged to the photosensitive element 13 through the second lens 14. The optical path of the detection device 100 is relatively simple, the structure of the detection device 100 is relatively simple, and the overall volume is relatively small.

[0034] The laser 11 may be a vertical-cavity surface-emitting laser 11 (VCSEL), which can emit multiple infrared spots simultaneously. Alternatively, the laser 11 may be an edge-emitting laser 11, which can emit a single infrared spot. In this case, the detection device 100 also needs to be provided with a diffractive optical element, which is used to diffuse the single infrared spot, so that the infrared spot increases in multiples, thereby emitting multiple infrared spots at a single time.

[0035] In some embodiments, the detection device 100 further includes a mounting member 15, the mounting member 15 is disposed on the substrate 10, the mounting member 15 has an inclined surface 15a, the inclined surface 15a is disposed obliquely to the substrate 10, the laser 11 is disposed on the inclined surface 15a, and the emission direction of the laser is perpendicular to the inclined surface 15a. In this way, on the one hand, by mounting the mounting member 15 on the substrate 10 and using the inclined surface 15a of the mounting member 15 to mount the laser 11, the laser 11 can be stably mounted on the substrate 10. On the other hand, by using the inclined surface 15a of the mounting member 15 to be disposed obliquely to the substrate 10, the emission direction of the laser emitted by the laser 11 is perpendicular to the inclined surface 15a, thereby making the emission direction of the laser inclined to the substrate 10, and the inclination angle of the emission direction of the laser can be determined by the inclination angle of the inclined surface 15a and the substrate 10, and the inclination angle of the inclined surface 15a and the substrate 10 can be controlled by processing and assembly, and the inclination angle of the emission direction of the laser can be controlled.

[0036] Optionally, the angle between the inclined surface 15a and the substrate 10 is α, 30°≤α≤75°. In this way, the angle α is formed between the inclined surface 15a and the substrate 10, and the laser is emitted perpendicular to the inclined surface 15a. When it is converged to the target object through the first lens 12, the angle between the incident direction of the laser and the target object is θ, and θ=90°-α. That is, 30°≤90°-θ≤75°, and thus, 15°≤θ≤60°. If α<30°, then θ>60°. At this time, the angle θ between the incident direction of the laser and the target object is larger. When the distance d between the laser 11 and the photosensitive element 13 is the same, a larger distance L needs to be set between the laser 11 and the target object so that the light emitted by the target object can be converged to the photosensitive element 13, and the use distance L of the detection device 100 is longer. If α>75°, then θ<60°. At this time, the angle θ between the incident direction of the laser and the target object is larger. When the distance L between the laser 11 and the target object is the same, the distance d between the laser 11 and the photosensitive element 13 is larger, and the overall volume of the detection device 100 is larger.

[0037] Therefore, the angle α between the inclined surface 15a and the substrate 10 can be 30°≤α≤75°, and the angle θ between the incident direction of the laser converged to the target object and the target object can be 15°≤θ≤60°. The use distance L of the detection device 100 is short, and the distance d between the laser 11 and the photosensitive element 13 is small, and the overall volume of the detection device 100 is small. The angle α can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, etc., and the angle θ can be 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, etc., and this embodiment does not specifically limit this.

[0038] In some embodiments, the detection device 100 further includes a narrowband filter 16, which is disposed between the laser 11 and the first lens 12. Thus, by disposing the narrowband filter 16 between the laser 11 and the second lens 14, the narrowband filter 16 is used to filter stray light of other wavelengths, and the laser light emitted by the laser 11 is emitted to the first lens 12, thereby reducing the influence of stray light and improving the sensitivity of blood sugar detection.

[0039] Exemplarily, the light also includes Rayleigh scattered light, and the detection device 100 also includes a notch filter 17, which is disposed between the second lens 14 and the photosensitive element 13, and is used to filter the laser and Rayleigh scattered light in the light, and to transmit the Raman scattered light to the photosensitive element 13. In this way, by filtering the laser and Rayleigh scattered light through the notch filter 17, interference caused by the laser and Rayleigh scattered light can be avoided, the signal-to-noise ratio of the Raman spectrum can be improved, and thus the sensitivity of blood sugar detection can be improved.

[0040] In some embodiments, the detection device 100 further includes a bandpass filter, which is disposed between the second lens 14 and the photosensitive element 13. In this way, by providing the bandpass filter to filter stray light, Raman scattered light of a specific wavelength or bandwidth is incident on the photosensitive element 13, and a specific characteristic peak can be obtained.

[0041] Exemplarily, the detection device 100 includes a plurality of photosensitive elements 13 and a plurality of bandpass filters, the plurality of photosensitive elements 13 are arranged at intervals on the substrate 10, the central wavelengths of the plurality of bandpass filters are different, and the plurality of bandpass filters are arranged one by one corresponding to the plurality of photosensitive elements 13. In this way, by using a plurality of bandpass filters with different central wavelengths to filter stray light, Raman scattered light of different specific wavelengths is irradiated to different photosensitive elements 13, so that the Raman characteristic peak intensities of multiple specific wavelengths can be collected, thereby improving the accuracy of blood glucose detection. For example, the detection device 100 has four bandpass filters and four photosensitive elements 13, and the four photosensitive elements 13 can be arranged in a 2x2 manner, so as to collect the Raman characteristic peak intensities of four characteristic wavelengths, including three characteristic peaks of glucose and one characteristic peak of hemoglobin. Specifically, the central wavelengths of the four bandpass filters can be 845.5nm, 865.6nm, 861nm, and 893.5nm, respectively, and the bandwidth is 0.5nm, then the three characteristic peaks of glucose that can be collected are 911cm -1 、1060cm -1 、1125cm -1 , and a characteristic peak of hemoglobin at 1549 cm -1 .

[0042] Optionally, the first lens 12 includes one of a Fresnel lens, a diffractive lens, and a super lens, and the second lens 14 includes one of a Fresnel lens, a diffractive lens, and a super lens. This embodiment provides a plurality of first lenses 12 and second lenses 14 with different structures, which can be selected according to actual conditions, and this embodiment does not specifically limit this.

[0043] The first embodiment of the present invention provides a detection device 100, in which a laser 11 is arranged on a substrate 10, and the laser 11 can emit laser light, and the emission direction of the laser light is inclined to the substrate 10, and the laser light is focused to the target object by the first lens 12, so that the target object can emit light to the second lens 14 after receiving the laser light, and the second lens 14 can focus the light to the photosensitive element 13 arranged on the substrate 10, so that the photosensitive element 13 can receive Raman scattered light in the light, thereby realizing blood sugar detection. In addition, the emission direction of the laser light emitted by the laser 11 is inclined to the substrate 10, and after the laser light is focused to the target object by the first lens 12, the light emitted by the target object can be projected to the second lens 14, and then focused to the photosensitive element 13 by the second lens 14, and the optical path of the detection device 100 is relatively simple, the structure of the detection device 100 is relatively simple, and the overall volume is relatively small.

[0044] Embodiment 2

[0045] See also Figure 2 , is a schematic structural diagram of a blood glucose meter 200 provided in the second embodiment of the present invention, and the blood glucose meter 200 includes the detection device 100 of the first embodiment.

[0046] The second embodiment of the present invention provides a blood glucose meter 200 , in which the optical path of the detection device 100 is relatively simple, the structure of the detection device 100 is relatively simple, and the overall volume is relatively small, which is conducive to the miniaturization design of the blood glucose meter 200 .

[0047] The above is a detailed introduction to a detection device and a blood glucose meter disclosed in the embodiments of the present invention. This article uses individual examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the detection device and blood glucose meter of the present invention and their core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A detection device, characterized in that: include: substrate; A laser, the laser being disposed on the substrate and configured to emit laser light, wherein the emission direction of the laser light is inclined to the substrate; a first lens, the first lens being disposed on the light-emitting side of the laser, the first lens being used to receive the laser emitted by the laser and converge the laser to a target object, the target object being used to receive the laser and emit light, the light including the laser and Raman scattered light; A photosensitive element, wherein the photosensitive element is disposed on the substrate, and the photosensitive element and the laser are located on the same side of the substrate; and The second lens is disposed on a side of the photosensitive element away from the substrate, and the second lens is used to receive the light emitted by the target object and converge the light to the photosensitive element.

2. The detection device according to claim 1, characterized in that: The detection device further comprises a mounting member, which is arranged on the substrate. The mounting member has an inclined surface, which is arranged inclined to the substrate. The laser is arranged on the inclined surface, and the emission direction of the laser is perpendicular to the inclined surface.

3. The detection device according to claim 2, characterized in that: The angle between the inclined surface and the substrate is α, 30°≤α≤75°.

4. The detection device according to claim 1, characterized in that: The angle between the incident direction of the laser beam converging to the target object and the target object is θ, and 15°≤θ≤60°.

5. The detection device according to any one of claims 1 to 4, characterized in that: The detection device further comprises a narrowband filter, and the narrowband filter is arranged between the laser and the first lens.

6. The detection device according to any one of claims 1 to 4, characterized in that: The light also includes Rayleigh scattered light, and the detection device also includes a notch filter, which is arranged between the second lens and the photosensitive element. The notch filter is used to filter the laser and the Rayleigh scattered light in the light, and to transmit the Raman scattered light to the photosensitive element.

7. The detection device according to any one of claims 1 to 4, characterized in that: The detection device also includes a bandpass filter, which is arranged between the second lens and the photosensitive element.

8. The detection device according to claim 7, characterized in that: The detection device includes a plurality of the photosensitive elements and a plurality of the bandpass filters. The plurality of the photosensitive elements are arranged at intervals on the substrate. The central wavelengths of the plurality of the bandpass filters are different. The plurality of the bandpass filters are arranged corresponding to the plurality of the photosensitive elements one by one.

9. The detection device according to any one of claims 1 to 4, characterized in that: The first lens includes one of a Fresnel lens, a diffractive lens, and a super lens, and the second lens includes one of a Fresnel lens, a diffractive lens, and a super lens.

10. A blood glucose meter, characterized in that: Comprising the detection device according to any one of claims 1 to 9.

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