TWI546056B - Multifocal focused physiological sensing device - Google Patents

Description

Multi-focus concentrating physiological sensing device

The invention relates to a physiological detecting device, in particular to a multi-focus concentrating physiological sensing device capable of effectively collecting light.

With the advancement of technology, product development of physiological detection devices that can be worn around in recent years has become increasingly popular, such as physiological sensing watches. Most commonly used techniques use optical detection methods to generate a light source by using a light-emitting element, to inject light into the skin to be tested, to sense the light signal reflected by the skin, and to analyze the change of light intensity after the light source of different wavelengths passes through the physiological tissue. The signal calculates physiological values such as heart rate, blood oxygen, and blood sugar. However, when the intensity of the light source is insufficient, the light source cannot penetrate the depth of the skin and the biological tissue, and is easily affected by the noise of the ambient light. Accurate physiological data.

Therefore, in order to increase the light collection efficiency, a concentrating optical element is added to increase the intensity of the light, thereby improving the signal-to-noise ratio (S/N), which is a concentrating component such as Fresnel. The concentrating and receiving range of the lens (Fresnel Lens) is small, so that the efficiency cannot be effectively improved. In addition, when measuring heart rate, blood oxygen and blood sugar, it is necessary to use a variety of different wavelengths of light source. If only one focus optical element is used for concentrating light, it is impossible to perform signal analysis for each wavelength source at the same time, which is easy to cause measurement. Loss of precision in the physiological state.

Taking the prior art of US Pat. No. 5,995,856 as an example, and referring to the first figure at the same time, it is disclosed that there is an upper casing 90 and a lower casing 92 located below the upper casing 90, wherein the upper casing 90 has an upper concave mirror 902 and a physiological sensor 904, the lower housing 92 has a concave mirror 922 and a light-emitting element 924. The light-emitting element 924 emits a light source to the concave mirror 922, which is condensed and reflected to the skin 94 to be tested, and then reflected to the upper surface. The concave mirror 902 is configured to inject light into the physiological sensor 904 to detect a physiological state. However, the previous case does not mention that the curvature of the reflecting surface of the concave mirror can be adjusted to increase the condensing effect. Furthermore, since measuring a plurality of signals requires at least 2-3 different wavelengths of light source for processing and sensing, and the structure of the previous case cannot simultaneously use different wavelengths of light sources to detect different physiological signals, the previous case cannot be achieved. Simultaneously measure the function of physiological signals such as heart rate, blood oxygen and blood sugar.

In view of the above, the present invention proposes a multi-focus concentrating physiological sensing device to effectively overcome the above problems in view of the above-mentioned shortcomings of the prior art.

The main object of the present invention is to provide a multi-focus concentrating physiological sensing device, which can effectively increase the concentrating intensity, and can increase the light receiving range, and can have multiple light sources at the same time because of having multiple light incident focal points. To simultaneously use the light source of different wavelengths to converge on the skin to be tested, and to detect various physiological signals by using the light intensity change through the skin.

Another object of the present invention is to provide a multifocal concentrating physiological sensing device which has a simple structure, can effectively improve production efficiency, and can greatly improve the concentrating efficiency.

In order to achieve the above object, the present invention provides a multi-focus concentrating physiological sensing device, comprising: at least two illuminating elements respectively generating a light source, at least one multi-focus concentrator having at least one first elliptical reflecting member and at least one second ellipse The reflector is located at one end of the first elliptical reflector, wherein the first elliptical reflector has a first transparent plane having a first focus thereon, a sensor is placed on the first focus, and the first elliptical reflector and the second The intersection of the elliptical reflector has a first confocal point, a first object is placed on the first confocal point, the second elliptical reflector has a second transparent plane, and the second transparent plane has at least two second focal points; The second focus is respectively placed on the light-emitting element to generate a light source, the light source is concentrated to the first common focus through the second elliptical reflector and incident on an object to be tested, and the object to be tested reflects the light source back to the first common focus, and the first The elliptical reflector is reflected by the first focus to the sensor to detect the physiological state.

The purpose, technical content, features and effects achieved by the present invention will be more readily understood by the detailed description of the embodiments.

Referring to the second figure, as shown, the multi-focus concentrating physiological sensing device 1 includes at least two light-emitting elements 10 respectively generating a light source; at least one multi-focus concentrator 20 having at least a plurality of An elliptical reflector 22 and at least one second elliptical reflector 24 are disposed at one end of the first elliptical reflector 22, and the second elliptical reflector 24 is inclined upwardly to the first elliptical reflector 22 The inclination angle is about 1 to 15 degrees, the optimum inclination angle is 3 to 5 degrees, and the first elliptical reflector 22 and the second elliptical reflector 24 are integrally formed. The lower surface of the first elliptical reflector 22 has a first transparent plane 220. The first elliptical reflector 22 has a first focus 224 on the first planar transparent plane 220, and is located on the first elliptical reflector 22 and second. The intersection of the elliptical reflectors 24 has a first confocal point 25. The second elliptical reflector 24 of the embodiment has two first elliptical reflecting portions 246, 246', and the lower surface of the first elliptical reflecting portions 246, 246' has a second transparent plane 240, wherein the first elliptical reflecting portion 246 is The second planar focus plane 240 has a second focus 242, and the other first elliptical reflector 246' is located on the second planar transparent plane 240 and has a second focus 242'. The second focus 242, 242' is further provided with a light-emitting element 10, respectively, and the two light-emitting elements 10 respectively generate a light source, so that the light source can enter the second elliptical reflector 24 from the second focus 242, 242'; at least one sensor 30 The sensor 30 can be a photodiode (PD), a phototransistor, a charge-coupled device (CCD), and the sensor 30 is placed in the multi-focus concentrator 20 The first elliptical reflector 22 is on the first focus 224.

In addition, referring to the third and fourth figures, the present invention further has a housing 40 enclosing the light-emitting element 10, the multi-focus concentrator 20, and the sensor 30, and exposing the first confocal point 25, The object to be tested 28, such as the skin of a finger or a wrist, is placed on the first elliptical reflector 22 and located on the first confocal point 25 at the boundary of the second elliptical reflector 24 for detection. In addition, the two sides of the housing 40 are further provided with a strap (not shown) for attaching the multi-focus concentrating physiological sensing device 1 to the hand to perform physiological signals on the skin of the user's wrist. The measurement, or the multi-focus concentrating physiological sensing device 1 can be disposed in the steering wheel of the automobile. When driving, the skin of the finger can directly contact the measuring point of the multi-focus concentrating physiological sensing device 1 to facilitate the measurement. When you drive, you can instantly detect the physiological state. When the physiological state is not good, you can quickly remind you to drive.

Next, please refer to the second to fifth figures to illustrate the roadmap of light transmission when using the structure of the above embodiment. First, when measuring the physiological signal, the object to be tested 28, such as the finger of the measuring person, must be provided first. a first confocal point 25 placed on the first elliptical reflector 22 of the multi-focal concentrator 20 at the interface of the second elliptical reflector 24, and then transmitted through the light source generated by the two illuminating elements 10, so that the light source is respectively The two focal points 242, 242' enter the first elliptical reflecting portions 246, 246' to contact the curved surface of the first elliptical reflecting portions 246, 246', so that the light source reflects and concentrates the light to the first confocal point 25 and then enters the object to be tested. 28, the object 28 can reflect the light source through the first common focus 25, and the light source received by the first elliptical reflector 22 is reflected by the first elliptical reflector 22 and transmitted by the first focus 224 to the sensor 30. For the sensor 30 to detect the physiological parameter of the user according to the light source to be tested. The light emitting unit 10 can be a light emitting diode (LED), a surface mount type light emitting diode (SMD LED) or a laser diode (LD), and can be an infrared light emitting element that emits a wavelength of a light source. About 1000nm~1700nm, to measure blood sugar, or green light-emitting element, the wavelength of the light source is about 500nm~560nm, to measure the heart rate, or the red light-emitting element, the wavelength of the light source is about 600nm~700nm, or the wavelength of the light source The red light of 900 nm to 1000 nm is used to measure blood oxygen, so that the plurality of physiological signals are measured by the plurality of light-emitting elements 10 of different wavelengths, and can be replaced according to the needs of the user to measure physiological signals. Not limited.

In addition to the above embodiments, the structure of the multi-focus concentrating physiological sensing device 1 of the present invention can be further as shown in the sixth figure. The multi-focus concentrating physiological sensing device 1 includes at least one multi-focus concentrator 50, and more. The focus concentrator 50 has at least a first elliptical reflector 52 and a second elliptical reflector 54, the second elliptical reflector 54 is disposed at one end of the first elliptical reflector 52, and the second elliptical reflector 54 is tilted upward In the first elliptical reflector 52, the angle of inclination is about 1 to 15 degrees, and the optimum angle of inclination is 3 to 5 degrees, and the first elliptical reflector 52 and the second elliptical reflector 54 are integrally formed. The lower surface of the first elliptical reflector 52 has a first transparent plane 520. The first elliptical reflector 52 has a first focus 524 on both sides of the first transparent plane 520. The first elliptical reflector 52 has a first confocal point 55 at the interface with the second elliptical reflector 54 and the second elliptical reflector 54 further includes two first elliptical reflectors 546, 546' and a The second elliptical reflecting portion 548, the first elliptical reflecting portion 546 and the second elliptical reflecting portion 548 are the same curved ellipse, and each of the first elliptical reflecting portions 546 has a second transparent plane 540, 540', and the second transparent The two ends of the plane 540, 540' respectively have a second focus 542, 542', and the second focus 542, 542' is respectively provided with a light-emitting element 10 to respectively generate a light source, so that the light source can be made up of two second focus points 542, 542' The second elliptical reflector 54 is entered. The second elliptical reflector 548 is located at one end of the first elliptical reflector 52, and the lower surface of the second elliptical reflector 548 has a third transparent plane 545, and the third transparent plane 545 has a second confocal 56. The two first elliptical reflection portions 546, 546' are oppositely disposed on the second elliptical reflector 548, so that the second transparent planes 540, 540' are connected to the third transparent plane 545; at least one sensor 30 is disposed at the The first focus 524 of the first elliptical reflector 52 of the focus concentrator 50.

Referring to the sixth and seventh figures, the present invention further has a casing 40 covering the light-emitting element 10, the multi-focus concentrator 50, and the sensor 30, and exposing the first confocal point 55. For the object to be tested 28, such as the skin of a finger or a wrist, placed on the first elliptical reflector 52 and located at the first confocal point 55 at the junction of the second elliptical reflector 54, the rest being the same as the first embodiment The same, so the description is not repeated.

Next, please refer to the sixth to eighth figures to illustrate the roadmap of light transmission when the structure of the second embodiment is used. First, when measuring the physiological signal, a test object 28 must be provided first, such as measurement. The finger of the person is placed on the first confocal point 55 of the multifocal concentrator 50. After the light sources of the two light-emitting elements 10 enter the first elliptical reflection portions 546, 546' by the two second focus portions 542, 542', respectively, the surface-reflecting light source is contacted and concentrated in the second confocal point 56, and then transmitted to the second elliptical reflection portion. 548, the reflected light source is emitted to the first common focus 55 to be incident on the object to be tested 28, and the object to be tested 28 reflects the light source through the first common focus 55 and is incident on the curved surface of the first elliptical reflector 52. The first focus 524 is passed to the sensor 30 for the sensor 30 to detect the light source to be tested to detect physiological parameters. The above-described light-emitting elements 10 are the same as those of the first embodiment, and thus the description thereof will not be repeated.

In summary, the structure of the invention is simple, the production efficiency can be effectively improved, the concentrating intensity can be effectively increased, the light-receiving range can be increased, and the light source with multiple wavelengths can be simultaneously used due to the multiple light-in focus. At the same time, the light sources of different wavelengths are used to converge on the skin to be tested, and various physiological signals are detected by the change of the light intensity through the skin.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, any changes or modifications of the features and spirits of the present invention should be included in the scope of the present invention.

1‧‧‧Multi-focus concentrating physiological sensing device
10‧‧‧Lighting elements
20‧‧‧Multi-focus concentrator
22‧‧‧First elliptical reflector
220‧‧‧First transparent plane
224‧‧‧ first focus
24‧‧‧Second elliptical reflector
240‧‧‧Second transparent plane
242‧‧‧second focus
242'‧‧‧second focus
246‧‧‧First elliptical reflector
246'‧‧‧First elliptical reflector
25‧‧‧First Focus
28‧‧‧Test object
30‧‧‧ Sensor
40‧‧‧shell
50‧‧‧Multi-focus concentrator
52‧‧‧First elliptical reflector
520‧‧‧First transparent plane
524‧‧‧ first focus
54‧‧‧Second elliptical reflector
540‧‧‧Second transparent plane
540'‧‧‧ second transparent plane
542‧‧‧second focus
542'‧‧‧second focus
546‧‧‧First elliptical reflector
546'‧‧‧First elliptical reflector
548‧‧‧Second elliptical reflector
545‧‧‧ third transparent plane
55‧‧‧First focus
56‧‧‧Second focus
90‧‧‧Upper casing
902‧‧‧Upper concave mirror
904‧‧‧ Physiological sensor
92‧‧‧ Lower housing
922‧‧‧ concave mirror
924‧‧‧Lighting elements
94‧‧‧ skin to be tested

The first figure is a schematic diagram of a conventional physiological detection device. The second drawing is a perspective view of the first embodiment of the present invention. The third figure is a schematic view of the cladding casing of the first embodiment of the present invention. The fourth drawing is a side perspective view of the covering case of the first embodiment of the present invention. The fifth figure is a schematic diagram of light refraction according to the first embodiment of the present invention. The sixth drawing is a perspective view of a second embodiment of the present invention. The seventh drawing is a side perspective view of the covering case of the second embodiment of the present invention. The eighth figure is a schematic diagram of light refraction according to a second embodiment of the present invention.

1‧‧‧Multi-focus concentrating physiological sensing device

10‧‧‧Lighting elements

20‧‧‧Multi-focus concentrator

22‧‧‧First elliptical reflector

220‧‧‧First transparent plane

224‧‧‧ first focus

24‧‧‧Second elliptical reflector

240‧‧‧Second transparent plane

242‧‧‧second focus

242’‧‧‧second focus

246‧‧‧First elliptical reflector

246'‧‧‧First elliptical reflector

25‧‧‧First Focus

30‧‧‧ Sensor

Claims (13)

A multi-focus concentrating physiological sensing device includes: at least two illuminating elements respectively generating a light source; at least one multi-focus concentrator having at least one first elliptical reflecting member and at least one second elliptical reflecting member at the first One end of the elliptical reflector, the second elliptical reflector is inclined upwardly to the first elliptical reflector, the first elliptical reflector having a first transparent plane having a first focus thereon, the second elliptical reflector Having a second transparent plane, each of which has at least two second focal points, and the first elliptical reflector and the second elliptical reflector have a first common focus, and the second focus respectively places the light emitting component Generating a light source such that the two light sources converge light through the second elliptical reflector to the first confocal point and are incident on an object to be tested, and are reflected back to the first confocal point, so that the light source is reflected and then emitted by the first focus And at least one sensor disposed at the first focus of the multi-focus concentrator to receive the light source to be tested for the sensor to detect a physiological state. The multi-focus concentrating physiological sensing device of claim 1, wherein the second elliptical reflector of the multifocal concentrator further comprises two first elliptical reflecting portions, each of the first elliptical reflecting portions having one end respectively One of the second focus. The multi-focus concentrating physiological sensing device of claim 1, wherein the first elliptical reflector and the second elliptical reflector are integrally formed. The multi-focus concentrating physiological sensing device of claim 1, wherein the object to be tested is located on the first confocal point. The multi-focus concentrating physiological sensing device of claim 1, wherein the second elliptical reflector has an inclination angle of 1 to 15 degrees. The multi-focus concentrating physiological sensing device of claim 1, wherein the second elliptical reflector The method further includes two first elliptical reflecting portions and a second elliptical reflecting portion, each of the first elliptical reflecting portions having the second transparent plane having a second focus thereon, and the second elliptical reflecting portion having a first a third transparent plane having a second confocal point thereon, the second elliptical reflecting portion being located at one end of the first elliptical reflecting member, and the two first elliptical reflecting portions being oppositely disposed on the second elliptical reflecting portion The second transparent plane is connected to the third transparent plane, and the two second focal points respectively receive the light source into the first elliptical reflecting portion, and the second confocal focusing light reflects the light source to the first elliptical reflecting member The first common focus is emitted to be projected onto the object to be tested. The multi-focus concentrating physiological sensing device of claim 6, wherein the first elliptical reflecting portion is the same as the second elliptical reflecting portion curved surface. The multi-focus concentrating physiological sensing device of claim 2 or 6, wherein the illuminating elements are respectively disposed on the second focus of the second elliptical reflector. The multi-focus concentrating physiological sensing device of claim 1, wherein the illuminating element is a red illuminating element, a green illuminating element or an infrared illuminating element. The multi-focus concentrating physiological sensing device according to claim 1, wherein the illuminating element is a light emitting diode (LED), a surface-adhesive light-emitting diode (SMD LED) or a laser diode (LD). . The multi-focus concentrating physiological sensing device of claim 1, further comprising a casing covering the illuminating element, the multifocal concentrator and the sensor, and exposing the first confocal point. The multi-focus concentrating physiological sensing device according to claim 9, wherein the infrared light emitting element emits a light source having a wavelength of 1000 nm to 1700 nm, and the green light emitting element emits a light source having a wavelength of 500 nm to 560 nm, and the red light emitting element The wavelength of the emitted light source is 600 nm to 700 nm, or 900 nm to 1000 nm. The multi-focus concentrating physiological sensing device according to claim 9, wherein the infrared light emitting element It is used to measure blood sugar, the green light emitting element is used for measuring heart rate, and the red light emitting element is used for measuring blood oxygen.