A wearable smart bracelet device based on physiological signal recording

Abstract

A wearable smart wristband device based on physiological signal acquisition for the acquisition of physiological signals, comprising a wristband case (1) wherein a main control board (11) and a module for acquiring physiological signals (12) are arranged inside the case (1); the receiver unit of the physiological signal sensor (12) is aligned with the sensing window (13) located on the underside of the wristband case (1). A battery (14) is also integrated inside the main part of said wristband (1).

Description

TECHNICAL AREA

[0001] The present utility model relates to the field of intelligent carrying devices and in particular to a wearable intelligent wristband device based on the detection of physiological signals. TECHNICAL BACKGROUND

[0002] Existing wearable health monitoring devices, particularly smartwatches, are already widely used for the daily monitoring of basic physiological parameters such as heart rate. However, these devices still have limitations regarding their design and data quality. The key issues are: Signal perception is susceptible to motion interference, leading to waveform distortions and complicating the analysis of highly psychological parameters such as heart rate variability (HRV). Furthermore, the internal design is complex, hindering maintenance and upgrades. Wearing stability and comfort also need improvement, resulting in an unsatisfactory user experience. Therefore, we have proposed a wearable smart bracelet technology based on the capture of physiological signals, designed to solve the aforementioned problems. CONTENTS OF THE PRESENT APPLICATION(1) Technical problems solved

[0003] To overcome the disadvantages of existing technology, the present utility model solution provides a wearable smart wristband device based on the acquisition of physiological signals. It solves the problems of conventional wearable health monitoring wristbands described in the previous section, such as a disorderly internal structure, signal distortion due to movement disturbances, and poor wearing stability and discomfort. (2) Technical solution

[0004] To achieve the aforementioned objectives, the present utility model solution implements the following technical solution: A wearable smart bracelet based on the acquisition of physiological signals comprises a main body in which a main control board and a module for acquiring physiological signals are integrated.

[0005] The receiver unit of the aforementioned physiological signal sensor is aligned with the detection windows at the lower part of the wristband housing.

[0006] Inside the main body of the aforementioned bracelet is also a battery.

[0007] Furthermore, the battery is located in the lower part of the bracelet case and is configured so that the overall weight of the case is closer to the wearer's body side when worn.

[0008] Furthermore, the inside of the main body of the bracelet extends to a first and a second mounting reinforcement plate group, with the data acquisition window positioned between these two groups.

[0009] Furthermore, the physiological signal sensor module is located between the first and second mounting grid plates. It comprises a control board for the sensor and a PPG sensor whose receiving area is aligned with the detection window.

[0010] Furthermore, a first mounting position is provided on the top of the first mounting grid plate group, via which the charging control plate is attached.

[0011] In addition, a charging port is provided on one side of the main body of the bracelet, with the charging control plate integrating a charging port plate, one end of which protrudes into the charging port hole.

[0012] In addition, a second mounting position is provided on the top of the second mounting grid plate group, to which the main control plate is attached.

[0013] Furthermore, the width of the second mounting grid plate group is greater than that of the first, and the battery is located on the lower inside of this second group.

[0014] In addition, the system includes a wrist strap attachment that is located at both ends of the main part of the wristband.

[0015] Furthermore, the main control chip of the main control board is the ESP32-C3; a cover is also attached to the top of the main body of the bracelet. (3) Beneficial effects

[0016] Compared to existing technologies, the present utility model solution offers a wearable smart wristband device for recording physiological signals, which offers the following advantages: The stable mounting frame, consisting of the first and second groups of mounting grid plates, precisely positions the physiological signal sensor module and the PPG sensor. Combined with the optimized center-of-gravity design of the battery in the lower part of the wristband housing and the constant central pressure of the wristband, this ensures stable alignment and a closer fit between the PPG sensor's receiver interface and the data acquisition window. The stable acquisition of high-quality PPG signals with low motion distortion forms the crucial hardware foundation for HRV data extraction. The modular, self-contained mounting of the main control board and the charging control board on the hinge plate allows for easy maintenance and replacement.The overall structure thus provides a reliable and continuous data source for future psychological health analyses based on physiological signals and capturing pressure trends, attention states, and emotional fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS Fig. shows the schematic representation of the main structure of the wristband device according to the present utility model solution. Fig. shows the structure of the capture window according to the present utility model solution. Fig. shows the internal structure of the main part of the bracelet device according to the present utility model solution. Fig. shows the first assembly group of the reinforcement plate according to the present utility model solution. Fig. The second group of mounting grid plates according to the present utility model solution is shown. Fig. shows the structure of the physiological sensor within the framework of the present utility model solution.

[0017] Figure: 1. Main body of the wristband; 11. Main control board; 12. Physiological signal acquisition module; 121. Sensor control board; 122. PPG sensor; 13. Acquisition window; 14. Battery; 15. First mounting grid board; 151. First mounting position; 16. Second mounting grid board; 161. Second mounting position; 17. Charging control board; 171. Charging port; 18. Charging port; 19. Top cover; 2. Wristband. DETAILED DESCRIPTION

[0018] The technical solution according to the exemplary embodiments of the present utility model solution is described clearly and completely below with reference to the accompanying drawings. Obviously, the described exemplary embodiments represent only a portion of the possible embodiments of the present utility model solution, but not its entire range. All further embodiments developed by a person skilled in the art without creative effort are protected under the present utility model. Example

[0019] How Fig. As shown, an embodiment of the present utility models comprises a wearable intelligent wristband device for recording physiological signals, consisting of a wristband body 1 in which a main control module 11 and a physiological sensor module 12 are integrated.

[0020] The receiving unit of the physiological signal sensor 12 is aligned with the detection window 13 located in the base of the wristband housing 1.

[0021] Inside the main body 1 of the aforementioned bracelet is also the battery 14.

[0022] How Fig. As shown, in some embodiments the battery 14 is located in the lower part of the bracelet case 1 and is configured so that the entire center of gravity of the case is close to the wearer's side of the skin when worn.

[0023] The battery 14 serves as the main weight and is attached to the lower end of the wristband housing 1, closest to the body, thus altering the device's center of gravity. When worn by the user, the housing 1 therefore automatically conforms to the skin, increasing its resistance to displacement.

[0024] By positioning the battery 14 at the lower end of the wristband housing 1, the device's weight distribution is optimized, shifting the overall center of gravity downwards and closer to the wrist skin when worn. This significantly improves the device's stability during movement and reduces motion distortions caused by swinging or twisting the wristband. This provides a stable foundation for the physiological signal perception module 12.

[0025] How Fig. As shown, in some embodiments the inside of the main body 1 of the wristband extends to a first mounting grid plate group 15 and a second mounting grid plate group 16, with the data acquisition window 13 being arranged between these two groups.

[0026] The reinforcement plates emerging integrally from the inner surface of the main body 1 of the wristband – the first and second mounting reinforcement plate groups 15 and 16 – form a high-strength mounting frame. The collector window 13 is positioned between two groups of reinforcement plates, thus defining the mounting area of ​​the sensor module and structurally separating it from the areas for the main control module 11, the battery 14, and other modules. This enables a modular arrangement and effective EMI management.

[0027] The first mounting grid plate group 15 and the second mounting grid plate group 16 form the central framework of the bracelet housing 1. This structure physically and functionally divides the interior, thus creating a stable mechanical foundation and a precise positioning reference for the subsequent, independent assembly of the individual electronic modules. This ensures the stability and reliability of the overall structure.

[0028] How Fig. As shown, in some embodiments the physiological signal sensor module 12 is arranged between the first mounting grid plate group 15 and the second mounting grid plate group 16. The module 12 comprises a sensor control plate 121 and a PPG sensor 122, the receiving surface of which is aligned with the detection window 13.

[0029] The physiological signal sensor module 12 is of type MAX30102. The first and second mounting grid plate groups 15 and 16 act as fixed edge structures on both sides and together hold the sensor's control plate 121 in place, thereby "locking" the entire module 12 in the specified position. The PPG sensor 122 is integrated in a fixed position on the sensor control plate 121. Once the control plate is in position, the receiver unit automatically aligns with the sensing window 13 at the lower edge of the wristband housing 1.

[0030] The physiological signal perception module 12 is fixedly mounted in the designated zone between the two groups of mounting rails (first mounting rail group 15 and second mounting rail group 16), thus strictly limiting its spatial position. This ensures that the receiver part of the PPG sensor 122 is always precisely aligned with the detection window 13, forming a stable, unchanging optical path and fundamentally preventing optical distortions or signal losses due to displacements of internal components.

[0031] How Fig. As shown, in some embodiments a first mounting position 151 is provided on the upper side of the first mounting grid plate group 15, via which the charging control plate 17 is mounted.

[0032] The first mounting position 151 is a special structure at the top of the first mounting grid plate group 15, for example, a clamping slot, a screw position, or a positioning recess, which enables precise adjustment and fixation of the shape of the charging control plate 17. Assembly is simple and facilitates subsequent maintenance. The charging control plate 17 is mounted by lifting it from the top of the first mounting grid plate group 15. By being offset vertically from other modules located between the first mounting grid plate group 15 and the second mounting grid plate group 16, or on their underside, the internal stacking structure is optimized.

[0033] How Fig. As shown, in some embodiments a charging opening 18 is provided on one side of the main body 1 of the bracelet, inside of which a charging port 171 is located on the charging control plate 171.

[0034] The charging control board 17 serves as a carrier for the charging port 171, with its mounting position determining its axial orientation. After the charging control board 17 has been attached to the first mounting position 151 of the first mounting grid plate group 15, its integrated charging port 171 can be precisely inserted into the pre-drilled charging bore 18 on the side wall of the wristband housing 1, thus providing a stable connection for external chargers.

[0035] The charging port 171 is positioned directly above the charging control plate 17 and extends to the charging port 18 in the main body 1 of the wristband, making the charging port visible by default and simplifying the connection and disconnection of the charging cable for the user. This design ensures a secure connection of the charging port 171, prevents the internal connections from loosening due to repeated connection and disconnection, and simultaneously physically separates the charging zone from the main signal head zone (below).

[0036] How Fig. As shown, in some embodiments a second mounting position 161 is provided on the upper side of the second mounting grid plate group 16, to which the main control plate 11 is attached.

[0037] The second mounting position 161 is a mounting arrangement specifically designed for connecting the main control board 11 at the upper end of the second mounting grid plate group 16, for example in the form of clamping slots, screw positions, or positioning recesses. It enables easy installation and facilitates subsequent maintenance and replacement. The main control board 11 is mounted in a higher position via the mounting position, below which is the area enclosed by the second mounting grid plate group 16 – i.e., the battery 14 compartment – ​​thus creating a vertical, modular layered structure.

[0038] The main control board 11 is independently mounted at the second mounting position 161 on the top of the second mounting grid plate group 16, so that it is spatially separated from the physiological signal sensor module 12, the battery 14 and other components. This arrangement promotes cooling of the main control board 11, shortens the power supply path to the batteries 14 in the same area of ​​the grid plate group and simultaneously reduces the potential electromagnetic interference that the high-frequency circuits of the main control board 11 can exert on sensitive sensor signals.

[0039] How Fig. As shown, in some embodiments the width of the second mounting grid plate group 16 is greater than that of the first mounting grid plate group 15, wherein the battery 14 is arranged on the lower inside of the second mounting grid plate group 16.

[0040] The width of the reinforcement plate group determines the transverse dimension of the space it encloses. The wider second mounting reinforcement plate group 16 thus forms a larger battery 14 recess. The battery 14 is installed in the lower inner surface of this housing, thereby concentrating its weight on the lower surface, near the detection window 13. This structurally shifts the center of gravity of the device significantly downwards.

[0041] The second mounting plate group 16 is wider and forms a relatively large receiving chamber inside, ideally suited to accommodate the bulky battery 14. By positioning the battery 14 at the lower inside of this chamber, it is not only tightly enclosed and physically protected, but its weight is also transferred directly to the lowest part of the bracelet case 1 – significantly improving wearing stability.

[0042] How Fig. As shown, in some embodiments additionally bracelets 2 are provided, which are attached to both ends of the main part 1 of the bracelet.

[0043] The wristband 2 uses a standard, adjustable wristband that is either detachably or permanently connected to the two ends of the main part 1 of the wristband via the connecting pieces at both ends, thus forming a ring-shaped area. When worn, the tension of the wristband 2 is converted into pressure on the back of the main part 1 of the wristband, which counteracts the skin and thereby brings the measuring window 13 into contact with the skin. The material quality, elasticity, and adjustable length of the wristband 2 together determine the comfort level and the stability of the skin contact.

[0044] How Fig.As shown, in some embodiments the main control chip of the main control board 11 of the ESP32-C3 is located; in addition, a cover 19 is attached to the top of the main body 1 of the wristband.

[0045] The ESP32-C3 chip is integrated on the main control board 11 and executes the firmware program to perform key tasks such as scanning the PPG sensor 122, preliminary data filtering, and wireless data transmission via the wireless module. The cover 19 is connected to the base of the wristband housing 1 as a separate housing element via clamps, screws, or adhesive connections, and together they form a tightly sealed or dustproof chamber housing the main control board 11, the charging control board 17, and other internal components.

[0046] With the ESP32-C3 as the main control chip, the device is provided with a powerful and energy-efficient wireless data processing and communication system that meets the requirements for the preprocessing and transmission of physiological signals in real time. The cover 19 attached to the top of the main body 1 provides complete protection against dust, sweat, and other ingress agents, ensuring the safety and reliability of all electronic components and giving the device an attractive appearance. During operation: phase of stable signal acquisition

[0047] After the user wears the wristband, the wristband 2 exerts constant centripetal pressure, causing the optical window at the lower end of the wristband housing 1 to fit snugly against the wrist skin. The PPG sensor 122 (e.g., MAX30102), integrated into the physiological signal sensor module 12, is then activated and emits specific wavelengths of light into the skin tissue. After the light beam is reflected by the subcutaneous tissue, the light intensity varies according to the periodic changes in capillary volume caused by heartbeats. The photodetector integrated into the PPG sensor 122 continuously measures this reflection intensity and converts it into a continuous electrical signal—this is the original PPG signal.Thanks to the stable mounting structure consisting of the embedded measurement window 13, the internal reinforcement plates, and the tightly wrapped wrist strap 2, the relative position and pressure between the PPG sensor 122 and the skin remain stable during movement. This minimizes motion distortion and signal shifts, enabling the generation of high-quality PPG signals for advanced analyses. Signal processing and transmission:

[0048] The PPG analog signal, which is acquired by the physiological signal sensor module 12, is processed via digital interfaces such as I after preliminary processing. 2The signal is transferred to the main control board 11. There, the central control chip – for example, an ESP32 series – collects the digital PPG signal at a preset sampling frequency and performs initial digital filtering to suppress baseline drift and high-frequency noise. The processed PPG data stream is then transmitted wirelessly or via cable to external computing devices such as smartphones, tablets, or cloud servers via the Bluetooth or USB interface integrated into the main controller.

[0049] Phase of extractive evaluation of advanced physiological parameters: In the software of an external computing device—be it a PC or a mobile device—the received PPG data undergoes precise filtering and processing using an algorithm to detect characteristic points and accurately identify each peak per heartbeat. The time interval between two consecutive heartbeats, i.e., the RR interphase, is then calculated. Based on the RR interphase... A series of heart rate variability (HRV) parameters are systematically calculated in the time and frequency domains, including SDNN and RMSSD. These HRV parameters are considered key quantitative indicators of the baseline state of the autonomic nervous system.

[0050] Intelligent analysis and feedback generation: The calculated HRV parameters, along with other derived physiological characteristics—such as the resting heart rate trend line—are fed into a data analysis system that integrates a model with psychological insights. This system, based on big data models, does not simply determine threshold values ​​but rather comprehensively analyzes the user's current physiological parameters, historical trends, and current behavioral situations. Finally, the system generates an understandable, structured interpretation of the user's mental health—for example, stress levels and an assessment of emotional stability—as well as personalized suggestions for regulation, such as breathing exercises or activity recommendations, and presents these to the user via a graphical interface or in natural language.In this way, a complete closed cycle is realized, from the stable recording of physiological signals to the assessment and intervention of mental health status.

[0051] The physiological signal sensor module 12 and the PPG sensor 122 are precisely fixed by the stable mounting frame, which consists of the first mounting grid plate group 15 and the second mounting grid plate group 16. This is complemented by the optimized center of gravity calculation of the battery 14 in the lower part of the wristband housing 1 and the constant central pressure provided by the wristband 2. This ensures stable alignment and adjustment between the PPG sensor 122 and the sensing window 13, enabling reliable and stable acquisition of PPG signals with low motion distortion. This forms the crucial hardware basis for the extraction of HRV data. Furthermore, the modular, independent mounting of the main control board 11 and the charging control board 17 on the joint plate group allows for easy maintenance and replacement.The overall structure forms a reliable and continuous data source for the subsequent mental health analysis, which is based on physiological signals and is intended to capture pressure trends, the state of attention, and emotional fluctuations.

[0052] Finally, it should be noted that the examples mentioned above merely represent preferred embodiments of the present utility model solution and do not limit it. Although the present solution has been explained in detail with reference to the examples given, those skilled in the field may further develop the technical solutions described in these examples or replace individual technical features with equivalent variants. All modifications, equivalent replacements, or improvements made in the spirit and according to the principles of the present utility model solution shall be subject to the scope of protection of this utility model solution. SUMMARY

[0053] The present utility model solution relates to the field of intelligent wearable devices and specifically to a wearable smart wristband device based on the acquisition of physiological signals. The stable mounting frame, consisting of the first and second groups of mounting grid plates, precisely positions the physiological signal sensor module and the PPG sensor. Combined with the optimized center-of-gravity design of the battery in the lower part of the wristband housing and the constant central pressure of the wristband, this ensures stable alignment and a closer fit between the receiver interface of the PPG sensor and the data acquisition window. The stable acquisition of high-quality PPG signals with low motion distortion forms the crucial hardware basis for the extraction of HRV data.The modular, independent mounting of the main control board and the charging control board on the hinge plate allows for easy maintenance and replacement. The overall structure thus provides a reliable and continuous data source for future psychological health analyses based on physiological signals, capturing pressure trends, attention states, and emotional fluctuations.

Claims

[1] A wearable smart wristband device based on physiological signal acquisition for the acquisition of physiological signals, comprising a wristband case (1) wherein a main control board (11) and a module for acquiring physiological signals (12) are arranged inside the case (1); the receiver unit of the physiological signal sensor (12) is aligned with the sensing window (13) provided on the underside of the wristband case (1). A battery (14) is also integrated inside the main part of said wristband (1). [2] A wearable smart wristband device based on physiological signal acquisition according to claim 1, which is based on the acquisition of physiological signals, characterized by , that the battery (14) is located in the lower part of the bracelet case (1) and is configured such that the entire center of gravity of the bracelet case (1) is located near the skin side of the wearer when worn. [3] A wearable smart wristband device based on physiological signal acquisition according to claim 1, which is based on the acquisition of physiological signals, characterized by , that the inside of the bracelet case (1) forms a first mounting grid plate (15) and a second mounting grid plate (16), wherein the detection window (13) is arranged between the first and the second mounting grid plates (15) and (16). [4] A wearable smart wristband device based on physiological signal acquisition according to claim 1, which is based on the acquisition of physiological signals, characterized by , that the physiological sensor module (12) is arranged between the first mounting grid plate (15) and the second mounting grid plate (16);The physiological signal perception module (12) comprises a sensor control board (121) and a PPG sensor (122) whose receiving area is aligned with the detection window (13). [5] A wearable smart wristband device based on physiological signal acquisition according to claim 3, which is based on the acquisition of physiological signals, characterized by , that a first mounting position (151) is provided on the top of the first mounting connecting disc (15) and a charging control plate (17) is attached above this position. [6] A wearable smart wristband device based on physiological signal acquisition according to claim 5, which is based on the acquisition of physiological signals, wherein a charging opening (18) is provided on one side of the wristband housing (1) and the charging control plate (17) integrates a charging connection point (171) the end of which extends into the charging opening (18). [7] A wearable smart wristband device based on physiological signal acquisition according to claim 3, which is based on the acquisition of physiological signals, characterized by, that a second mounting position (161) is provided on the top of the second mounting reinforcement plate (16) and the main control plate (11) is mounted on the second mounting reinforcement plate (16) via this position. [8] A wearable smart wristband device based on physiological signal acquisition according to claim 3, which is based on the acquisition of physiological signals, characterized by , that the width of the second mounting plate group (16) is greater than that of the first mounting plate group (15) and the battery (14) is located in the lower interior of the second mounting plate group (16). [9] A wearable smart wristband device based on physiological signal acquisition according to claim 1, which is based on the acquisition of physiological signals and further comprising a wristband (2) attached to both ends of the main part of the wristband (1). [10] A wearable smart wristband device based on physiological signal acquisition according to claim 1, which is based on the acquisition of physiological signals, wherein the main control board (11) is equipped with the control element ESP32-C3 and the wristband housing (1) is provided on its top side with a cover device (19).

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