Intelligent ring
By symmetrically setting up the light receiving module and integrating the light emitting module in the smart ring, the light signal receiving path is optimized, the problem of uneven light signal reception is solved, the sampling reliability is improved and the circuit design is simplified, and stable signal reception is achieved under different wearing angles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2026-03-17
AI Technical Summary
Existing smart rings suffer from poor light signal reception due to asymmetrical light sensor settings. This results in a large deflection angle when the ring is worn, affecting the quality of signal sampling and complicating circuit board circuitry.
The first and second optical receiving modules are symmetrically arranged to receive green light, red light, and infrared light signals respectively. The optical group transmitter integrates green light, red light, and infrared light transmitting modules. The optical receiving module and the transmitting module are arranged symmetrically around the center. Combined with the retaining wall structure and the inner ring of light-transmitting material, the optical signal receiving path is optimized.
It improves the reliability and stability of signal sampling, simplifies circuit design, ensures balanced reception of optical signals at different wearing angles, and reduces power consumption.
Smart Images
Figure CN223994898U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of smart wearable device technology, and in particular to a smart ring. Background Technology
[0002] PPG (photoplethysmograph) technology uses photoelectric sensors (PDs) to sample data such as heart rate and blood oxygenation.
[0003] Existing smart rings only have one green light sensor and one red light sensor, and they are positioned opposite each other. If the ring is deflected at a large angle when worn, it can easily lead to poor light signal reception, thus affecting the quality of signal sampling.
[0004] Furthermore, the green light emitter is positioned close to the green light sensor, while the red light emitter and infrared light emitter are positioned close to the red light sensor. This means that the green light emitter and green light sensor are located in one area, while the red light emitter, infrared light emitter, and red light sensor are located in another area, resulting in a more complex circuit board layout. Utility Model Content
[0005] The purpose of this invention is to provide an intelligent ring with two symmetrically arranged first and second optical receiving modules to prevent or reduce signal degradation caused by ring rotation, thereby improving the reliability and stability of sampling.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A smart ring includes a housing, a light emitting unit, and a light receiving unit. The housing has an inner cavity. The light emitting unit and the light receiving unit are both located inside the inner cavity. The light emitting unit integrates a green light emitting module, a red light emitting module, and an infrared light emitting module.
[0008] The optical receiver unit includes a first optical receiver module and a second optical receiver module;
[0009] The first optical receiving module is used to receive green light signals. The first optical receiving module is set close to the optical group transmitter, and two are set symmetrically with the optical group transmitter as the center.
[0010] The second optical receiving module is used to receive red light and infrared light signals. The second optical receiving module is set away from the optical group emitting part, and two are set symmetrically with the optical group emitting part as the center.
[0011] In some implementations, two green light emitting modules are arranged symmetrically.
[0012] In some implementations, the angle between the first optical receiving module and the optical group emitting unit is between 25 degrees and 45 degrees.
[0013] In some implementations, the second optical receiving module is offset from the optical group emitting section at an angle between 45 degrees and 65 degrees.
[0014] In some embodiments, an inner ring is also included, which is made of a light-transmitting material; the inner ring has multiple protrusions, which are spherical or rectangular. Among them, the first protrusion corresponds to the first light receiving module, the second protrusion corresponds to the second light receiving module, and the third protrusion corresponds to the light group emitting part.
[0015] In some embodiments, the light receiving unit further includes a barrier structure, which is provided at least between the first light receiving module and the second light receiving module; the barrier structure is higher than the first light receiving module and the second light receiving module.
[0016] In some embodiments, the light group emitting unit sequentially emits green light signals, red light signals, and infrared light signals;
[0017] The corresponding optical receivers sequentially receive green light signals, red light signals, and infrared light signals.
[0018] In some implementations, the light signals emitted by the green light emitting module, the red light emitting module, and the infrared light emitting module have the same emission duration;
[0019] The light signal transmission intervals between the green light emitting module, the red light emitting module, and the infrared light emitting module are the same;
[0020] The duration of the launch is longer than the launch interval.
[0021] In some implementations, it also includes an MCU processing chip, an AFE analog front-end chip, and an accelerometer;
[0022] Both the AFE analog front-end chip and the accelerometer are electrically connected to the MCU processing chip.
[0023] Both the optical transmitter and receiver are electrically connected to the AFE analog front-end chip;
[0024] It also includes batteries, charging and discharging chips, power conversion chips, and wireless communication chips;
[0025] The battery, charging / discharging chip, power conversion chip, and MCU processing chip are electrically connected in sequence.
[0026] The power conversion chip is electrically connected to the accelerometer.
[0027] The wireless communication chip and the MCU processing chip are electrically connected.
[0028] The beneficial effects of this utility model are: two optical receiving modules are symmetrically arranged for both the first and second optical receiving modules, which prevents or reduces signal degradation caused by the rotation of the ring, and improves the reliability and stability of sampling.
[0029] Furthermore, the light group's emitting section integrates a green light emitting module, a red light emitting module, and an infrared light emitting module, which helps to simplify circuit design;
[0030] Both the first and second optical receiving modules are arranged symmetrically around the optical transmitter, forming a unique layout. Attached Figure Description
[0031] Figure 1 This is one of the structural schematic diagrams of the smart ring of this utility model;
[0032] Figure 2 This is one of the structural layout diagrams of the light emitting section of this utility model;
[0033] Figure 3 This is one of the structural cross-sectional views of the smart ring of this utility model;
[0034] Figure 4 This is one of the cross-sectional views of the inner ring of this utility model;
[0035] Figure 5 This is the second cross-sectional view of the inner ring of this utility model;
[0036] Figure 6 This is the second structural schematic diagram of the smart ring of this utility model;
[0037] Figure 7 This is the second structural arrangement diagram of the light emitting section of this utility model;
[0038] Figure 8 This is the second structural cross-sectional view of the smart ring of this utility model;
[0039] Figure 9 This is a circuit connection structure diagram of the smart ring of this utility model;
[0040] Figure 10 This is a schematic diagram of the sampling steps of this utility model;
[0041] Wherein: 1-Housing; 10-Inner cavity; 2-Inner ring; 21-First boss; 22-Second boss; 23-Third boss; 3-Battery; 4-Circuit board; 5-Light emitting unit; LED1-Green light emitting module; LED2-Red light emitting module; LED3-Infrared light emitting module; 6-Light receiving unit; PD1-First light receiving module; PD2-Second light receiving module; 61-First barrier; 62-Second barrier; 81-MCU processing chip; 82-AFE analog front-end chip; 83-Charging and discharging chip; 84-Power conversion chip; 85-Acceleration sensor; 86-Wireless communication chip. Detailed Implementation
[0042] The present invention will now be described in further detail with reference to the accompanying drawings.
[0043] refer to Figure 1 and Figure 6 A smart ring includes a housing 1, a light emitting part 5 and a light receiving part 6. The housing 1 is ring-shaped and has an inner cavity 10.
[0044] Both the light emitting unit 5 and the light receiving unit 6 are located inside the inner cavity 10. The light emitting unit 5 integrates a green light emitting module LED1, a red light emitting module LED2 and an infrared light emitting module LED3. The integration can be understood as the green light emitting module LED1, the red light emitting module LED2 and the infrared light emitting module LED3 being placed in the same position.
[0045] The green light emitting module LED1 is used to emit green light signals, the red light emitting module LED2 is used to emit red light signals, and the infrared light emitting module LED3 is used to emit infrared light signals;
[0046] refer to Figure 1 and Figure 6 The optical receiving unit 6 includes a first optical receiving module PD1 and a second optical receiving module PD2; the first optical receiving module PD1 is used to receive green light signals, and the second optical receiving module PD2 is used to receive red light and infrared light signals.
[0047] Both the first optical receiving module PD1 and the second optical receiving module PD2 are based on PPG (photoplethysmography, a photoelectric technique for detecting the blood volume of microvessels in tissues) sensors or light sensors, which can be used to measure physiological parameters such as heart rate and blood oxygen saturation. PPG technology is existing technology, and the first optical receiving module PD1 and the second optical receiving module PD2 are applications of existing technology.
[0048] Heart rate sampling: The green light emitting module LED1 emits a green light signal, which is reflected by the finger and received by the first light receiving module PD1. The reflected green light signal is processed to obtain the user's heart rate data.
[0049] Blood oxygen sampling: The red light emitting module LED2 emits a red light signal, which is reflected by the finger and received by the second light receiving module PD2. Then, the infrared light emitting module LED3 emits an infrared light signal, which is transmitted through the finger and received by the second light receiving module PD2. The reflected red light signal and the transmitted infrared light signal are processed to obtain the user's blood oxygen data.
[0050] refer to Figure 1 and Figure 6 The first optical receiving module PD1 is set close to the optical group transmitter 5, and two are set symmetrically with the optical group transmitter 5 as the center. This can be understood as: the two first optical receiving modules PD1 are set symmetrically with the center line OL.
[0051] The second optical receiving module PD2 is used to receive red light and infrared light signals. The second optical receiving module PD2 is set away from the optical group emitting part 5, and two are set symmetrically with the optical group emitting part 5 as the center. It can be understood that the two second optical receiving modules PD2 are set symmetrically with the center line OL.
[0052] Since green light has a shorter wavelength and red light has a longer wavelength, the first optical receiving module PD1 is positioned relatively closer to the optical group transmitter 5, while the second optical receiving module PD2 is positioned relatively farther away from the optical group transmitter 5, so that the intensity of the optical signal received by the first optical receiving module PD1 and the second optical receiving module PD2 tends to be more balanced.
[0053] The first optical receiving module PD1 and the second optical receiving module PD2 are both symmetrically arranged in twos, which can prevent or reduce the signal degradation caused by the ring rotation. Even if there is a certain deviation in the wearing angle of the ring, it can still ensure that a good optical signal is received, thereby improving the reliability and stability of sampling.
[0054] refer to Figure 2 The first embodiment of the light group emitting unit 5.
[0055] The green light emitting module LED1, the red light emitting module LED2, and the infrared light emitting module LED3 are arranged along the axial direction of the housing 1, and the three light signal emitting modules are all aligned with the center line OL.
[0056] refer to Figure 1 The angle α between the first optical receiving module PD1 and the green light emitting module LED1 of the optical group emitting unit 5 is between 25 degrees and 45 degrees. This facilitates the sampling of green light signals, ensuring reliable light signal reception even if the wearing angle of the ring has a certain deviation.
[0057] refer to Figure 1 The angle β between the second light receiving module PD2 and the red light emitting module LED2 or the infrared light emitting module LED3 of the light group emitting unit 5 is between 45 degrees and 65 degrees. This facilitates the sampling of red and infrared light signals, ensuring reliable light signal reception even if the wearing angle of the ring has a certain deviation.
[0058] refer to Figure 7 The second embodiment of the light group emitting unit 5.
[0059] The red light emitting module LED2 and the infrared light emitting module LED3 are arranged along the axial direction of the housing 1 and correspond to the center line OL. There are two green light emitting modules LED1, which are symmetrically arranged with respect to the center line OL. That is, the two green light emitting modules LED1 correspond to the two first light receiving modules PD1 in terms of position. The two green light emitting modules LED1 emit green light signals at the same time, which helps to improve the sampling accuracy of the green light signal.
[0060] refer to Figure 6 The angle α between the first optical receiving module PD1 and the green light emitting module LED1 of the optical group emitting unit 5 is between 25 degrees and 45 degrees. This facilitates the sampling of green light signals, ensuring reliable light signal reception even if the wearing angle of the ring has a certain deviation.
[0061] refer to Figure 6 The angle β between the second light receiving module PD2 and the red light emitting module LED2 or the infrared light emitting module LED3 of the light group emitting unit 5 is between 45 degrees and 65 degrees. This facilitates the sampling of red and infrared light signals, ensuring reliable light signal reception even if the wearing angle of the ring has a certain deviation.
[0062] Of course, the above angle settings need to be adjusted according to the ring diameter. For example, the smaller the ring diameter, the larger the angle between the transmitting module and the receiving module.
[0063] refer to Figure 3 and Figure 8 It also includes an inner ring 2, which is made of a light-transmitting material, such as glass, acrylic, sapphire, etc. The inner ring 2 can be fixed to the housing 1 by glue or snap-fit structure, and the housing 1 and the inner ring 2 form a basically sealed internal space.
[0064] The inner ring 2 is provided with a second boss 22, which can be spherical or rectangular (see reference). Figure 4 and Figure 5When the second protrusion 22 is spherical, it forms a convex lens structure, and its focal point points to the second optical receiving module PD2, which is conducive to the aggregation of optical signals and to the second optical receiving module PD2 receiving optical signals better.
[0065] Optionally, the inner ring 2 is provided with a first boss 21, which can be spherical or rectangular, and its structure is basically the same as or similar to that of the second boss 22 (see reference). Figure 4 and Figure 5 When the first protrusion 21 is spherical, it forms a convex lens structure. The focal point of the first protrusion 21 points to the first optical receiving module PD1, which is conducive to the aggregation of optical signals and to the second optical receiving module PD2 receiving optical signals better.
[0066] Optionally, the inner ring 2 is provided with a third boss 23, which can be spherical or rectangular, and its structure is basically the same as or similar to that of the second boss 22 (see reference). Figure 4 and Figure 5 The third protrusion 23 can be provided once, corresponding to the light emitting part 5; or multiple protrusions can be provided for each emitting module, for example, the green light emitting module LED1, the red light emitting module LED2 and the infrared light emitting module LED3 are all provided with the third protrusion 23.
[0067] refer to Figure 4 and Figure 5 The thickness of the inner ring 2 is T, which is greater than or equal to 0.5 mm. The height of the first boss 21, the second boss 22 and the third boss 23 is H, which is greater than or equal to 1.0 mm. The heights H of the first boss 21, the second boss 22 and the third boss 23 are approximately the same.
[0068] The design of the first protrusion 21, the second protrusion 22, and the third protrusion 23 facilitates accurate ring wearing by the user. In this case, the protrusion structure acts as a position marker. Simultaneously, it increases the friction between the ring and the finger, improving wearing stability. Of course, the first protrusion 21, the second protrusion 22, and the third protrusion 23 can be configured as needed.
[0069] refer to Figure 1 and Figure 6 The optical receiving unit 6 also includes a baffle structure, which is provided at least between the first optical receiving module PD1 and the second optical receiving module PD2. The baffle structure extends above the first optical receiving module PD1 and the second optical receiving module PD2, and its top end extends towards the inner ring 2, where it can appropriately approach or slightly abut against the inner ring 2. The baffle structure helps reduce light leakage and crosstalk within the inner cavity 10 or the inner ring 2, thereby improving the accuracy of optical signal sampling.
[0070] The first embodiment of the barrier structure: the first barrier 61 is disposed on both sides of the first optical receiving module PD1 and is higher than the first optical receiving module PD1; the second barrier 62 is disposed on both sides of the second optical receiving module PD2 and is higher than the second optical receiving module PD2; both the first barrier 61 and the second barrier 62 are flat.
[0071] A second embodiment of the retaining wall structure: the first retaining wall 61 is arranged around the first optical receiving module PD1 and is higher than the first optical receiving module PD1; the second retaining wall 62 is arranged around the second optical receiving module PD2 and is higher than the second optical receiving module PD2; both the first retaining wall 61 and the second retaining wall 62 can be in the shape of a ring or a square frame.
[0072] refer to Figure 10 The light emitting unit 5 emits green light signals, red light signals and infrared light signals in sequence; the corresponding light receiving unit 6 receives green light signals, red light signals and infrared light signals in sequence.
[0073] During sampling:
[0074] The first step involves simultaneously activating the green light emitting module LED1 and the first light receiving module PD1. LED1 emits a green light signal, and PD1 receives the reflected green light signal. Then, after a preset emission duration T1, both LED1 and PD1 stop simultaneously. Both PD1 modules simultaneously receive the reflected green light signal. If two LED1 modules are used, they emit green light signals simultaneously.
[0075] In the second step, the red light emitting module LED2 and the second light receiving module PD2 are started simultaneously. The red light emitting module LED2 emits a red light signal, and the second light receiving module PD2 receives the reflected red light signal. Then, after the preset emission duration T1 is reached, the red light emitting module LED2 and the second light receiving module PD2 stop simultaneously. Among them, the two second light receiving modules PD2 simultaneously receive the reflected red light signal.
[0076] Third, the infrared light emitting module LED3 and the second light receiving module PD2 are started simultaneously. The infrared light emitting module LED3 emits infrared light signals, and the second light receiving module PD2 receives the transmitted infrared light signals. Then, after reaching the preset emission duration T1, the infrared light emitting module LED3 and the second light receiving module PD2 stop simultaneously. Among them, the two second light receiving modules PD2 simultaneously receive the transmitted infrared light signals.
[0077] The above three steps can be regarded as a sampling cycle, and sampling is performed cyclically.
[0078] In this way, the green light signal, red light signal and infrared light signal are emitted in sequence, which helps to reduce interference between light signals, improve the accuracy and reliability of sampling, and also helps to reduce operating power and power consumption.
[0079] Furthermore, the light emission duration T1 of the green light emitting module LED1, the red light emitting module LED2, and the infrared light emitting module LED3 is the same;
[0080] The light signal emission interval T2 between the green light emitting module LED1, the red light emitting module LED2, and the infrared light emitting module LED3 is the same;
[0081] The duration of launch duration T1 is longer than the launch interval T2.
[0082] refer to Figure 9 It also includes an MCU processing chip 81, an AFE analog front-end chip 82, and an accelerometer sensor 85;
[0083] Both the AFE analog front-end chip 82 and the accelerometer 85 are electrically connected to the MCU processing chip 81.
[0084] Both the light emitting unit 5 and the light receiving unit 6 are electrically connected to the AFE analog front-end chip 82. That is, the green light emitting module LED1, the red light emitting module LED2, the infrared light emitting module LED3, the two first light receiving modules PD1 and the two second light receiving modules PD2 are all electrically connected to the AFE analog front-end chip 82; among them, one or two green light emitting modules LED1 can be provided.
[0085] The AFE analog front-end chip 82 converts the received optical signal (voltage signal) into a digital signal. The MCU processing chip 81 processes this digital signal or data to obtain information or data such as heart rate and blood oxygenation, which is then stored in memory. Simultaneously, in conjunction with the accelerometer sensor 85, the information or data can be further processed to obtain information or data such as sleep patterns and step count. Of course, the accelerometer sensor 85 can also assist in heart rate calculation or data processing.
[0086] It also includes battery 3, charging and discharging chip 83, power conversion chip 84 and wireless communication chip 86;
[0087] Battery 3, charging / discharging chip 83, power conversion chip 84 and MCU processing chip 81 are connected in sequence to each other.
[0088] The power conversion chip 84 is electrically connected to the accelerometer 85.
[0089] The wireless communication chip 86 is electrically connected to the MCU processing chip 81.
[0090] The wireless communication chip 86 can be a Bluetooth chip or a Wi-Fi chip, used to connect with terminals such as mobile phones. The terminal can have an app installed to interact with the ring. The terminal is used to display data such as heart rate and blood oxygen, and for transmitting commands. The chips mentioned above are all existing technologies and are only applied here.
[0091] refer to Figure 3 , Figure 8 and Figure 9 It also includes a circuit board 4, on which the light group transmitter 5, light receiver 6, MCU processing chip 81, AFE analog front-end chip 82, charging and discharging chip 83, power conversion chip 84, accelerometer 85 and wireless communication chip 86 are all assembled. The entire circuit board 4 is arc-shaped, with the light group transmitter 5 located in the middle of the circuit board 4 and the light receiver 6 located on both sides of the light group transmitter 5. The battery 3 is also arc-shaped, which facilitates assembly into the inner cavity 10 of the housing 1 and results in a compact structure.
[0092] The above description only discloses some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.
Claims
1. A smart ring, characterized in that, Including shell (1), light group emission part (5) and light receiving part (6), the shell (1) is equipped with inner chamber (10); The light group emission part (5) and light receiving part (6) are all arranged in the inner chamber (10), the light group emission part (5) is integrated with green light emission module (LED1), red light emission module (LED2) and infrared light emission module (LED3); The light receiving part (6) includes first light receiving module (PD1) and second light receiving module (PD2); The first light receiving module (PD1) is used for receiving green light signal, the first light receiving module (PD1) is arranged close to light group emission part (5), and two are arranged symmetrically with light group emission part (5) as center; The second light receiving module (PD2) is used for receiving red light and infrared light signal, the second light receiving module (PD2) is arranged away from light group emission part (5), and two are arranged symmetrically with light group emission part (5) as center.
2. The smart ring of claim 1, wherein, The green light emission module (LED1) is symmetrically arranged two.
3. The smart ring according to claim 1 or 2, characterized in that, The angle (α) of the first light receiving module (PD1) deviating from the green light emission module (LED1) of light group emission part (5) is between 25 degrees and 45 degrees.
4. The smart ring of claim 3, wherein, The angle (β) of the second light receiving module (PD2) deviating from the red light emission module (LED2) of light group emission part (5) is between 45 degrees and 65 degrees.
5. The smart ring of claim 1, wherein, Further comprising inner ring (2), the inner ring (2) is made of light-transmitting material; The inner ring (2) is equipped with second boss (22), the second boss (22) corresponds to second light receiving module (PD2), the second boss (22) is spherical or rectangular.
6. The smart ring of claim 5, wherein, The inner ring (2) is equipped with first boss (21), the first boss (21) corresponds to first light receiving module (PD1), the first boss (21) is spherical or rectangular; The inner ring (2) is equipped with third boss (23), the third boss (23) corresponds to light group emission part (5);The third boss (23) is spherical or rectangular; The height (H) of the first boss (21), second boss (22) and third boss (23) is the same.
7. The smart ring of claim 1, wherein, The light receiving part (6) further includes a retaining wall structure, at least between the first light receiving module (PD1) and the second light receiving module (PD2) is provided with the retaining wall structure;The retaining wall structure is higher than the first light receiving module (PD1) and the second light receiving module (PD2).
8. The smart ring of claim 7, wherein, The retaining wall structure includes first retaining wall (61) and second retaining wall (62); The first retaining wall (61) is arranged on both sides of the first light receiving module (PD1), and the second retaining wall (62) is arranged on both sides of the second light receiving module (PD2); Or the first retaining wall (61) is arranged around the first light receiving module (PD1), and the second retaining wall (62) is arranged around the second light receiving module (PD2).
9. The smart ring of claim 1, wherein, The light group emission part (5) emits green light signal, red light signal and infrared light signal in sequence; Correspondingly, the light receiving part (6) receives green light signal, red light signal and infrared light signal in sequence; The emission duration (T1) of the light signals of the green light emitting module (LED1), the red light emitting module (LED2) and the infrared light emitting module (LED3) is the same; The emission interval time (T2) of the light signals between the green light emitting module (LED1), the red light emitting module (LED2) and the infrared light emitting module (LED3) is the same; The length of the emission duration (T1) is longer than the emission interval time (T2).
10. The smart ring of claim 9, wherein, It also includes an MCU processing chip (81), an AFE analog front-end chip (82) and an acceleration sensor (85); The AFE analog front-end chip (82) and the acceleration sensor (85) are electrically connected with the MCU processing chip (81); The light group emitting part (5) and the light receiving part (6) are electrically connected with the AFE analog front-end chip (82); It also includes a battery (3), a charge-discharge chip (83), a power conversion chip (84) and a wireless communication chip (86); The battery (3), the charge-discharge chip (83), the power conversion chip (84) and the MCU processing chip (81) are electrically connected in sequence; The power conversion chip (84) is electrically connected with the acceleration sensor (85); The wireless communication chip (86) is electrically connected with the MCU processing chip (81).