Flexible wristband system for monitoring hemodynamics and recognizing gestures

Abstract

A flexible wristband system for monitoring hemodynamics and recognizing gestures, relating to the technical field of medical health monitoring and chalcogenide integrated photonics, and comprising: a wristband apparatus (3), an electric pulse generating apparatus (1), a signal light generating apparatus (2), a control device (4), and an information receiving, processing and display device (5), wherein a signal output end of the electric pulse generating apparatus (1) is electrically connected to a signal input end of the wristband apparatus (3), a signal output end of the signal light generating apparatus (2) is connected to the signal input end of the wristband apparatus (3) by means of an optical fiber, and signal input ends of the electric pulse generating apparatus (1), of the signal light generating apparatus (2) and of the information receiving, processing and display device (5) are all connected to a signal output end of the control device (4). The flexible wristband system can improve detection sensitivity and the capability of detecting weak signals.

Description

A flexible wristband system for monitoring hemodynamics and recognizing gestures Technical Field

[0001] The present invention relates to the fields of medical health monitoring and chalcogenide integrated photonics technology, and in particular to a flexible wristband system for monitoring hemodynamics and recognizing gestures. Background Art

[0002] With the continuous development of society, people's pace of life has greatly accelerated. Heavy workloads and increasing pressures have led more and more people to neglect their physical health. Existing research shows that sub-health conditions caused by insufficient physical activity can lead to a range of diseases, including obesity, diabetes, and hypertension. The number of deaths caused by this condition is now second only to smoking, making it the second leading cause of unnatural death. Therefore, people need to increase their physical activity and improve their physical fitness. However, blindly increasing the amount and intensity of physical activity based on personal preference will not achieve the desired results and may even lead to certain risks. Therefore, it is necessary to first assess people's current physical fitness before providing scientific exercise and fitness methods. Chalcogenide materials are non-oxide amorphous glasses formed by using the chalcogen elements of Group VIA of the periodic table (such as sulfur, selenium, and tellurium) as the base element and introducing other elements. Chalcogenide materials have advantages such as low Young's modulus, high photoelastic coefficient, excellent light field confinement, and continuously tunable component properties, and are widely used in the sensing field. As research in integrated photonics continues to advance, ultrasonic sensors based on chalcogenide materials have become a growing research hotspot both domestically and internationally, thanks to their simple structure and high sensitivity. However, piezoelectric or thin-film ultrasonic sensors, commonly used in current wearable integrated devices, have limited bandwidth and low unit sensitivity, hindering their practical application in detecting weak signals.

[0003] The prior art discloses a miniature ultrasonic blood pressure detection device comprising: at least one bulk piezoelectric material sensor, which is used to convert electrical energy into mechanical energy and transmit and receive ultrasonic waves, with the side of the bulk piezoelectric material sensor that transmits and receives ultrasonic waves facing the detection object; the bulk piezoelectric material sensor having at least a first electrode lead and a second electrode lead; a first circuit board disposed below the bulk piezoelectric material sensor, with an acoustic barrier layer disposed between the bulk piezoelectric material sensor and the first circuit board to prevent ultrasonic waves from the bulk piezoelectric material sensor from propagating toward the first circuit board; and a controller electrically connected to the first and second electrode lead terminals of the bulk piezoelectric material sensor via the first circuit board. This prior art piezoelectric ultrasonic sensor has a limited receiving bandwidth and low unit sensitivity, which has been a barrier to its practical application in detecting weak signals. Summary of the Invention

[0004] The primary purpose of the present invention is to overcome the problems existing in the prior art and provide a flexible wristband system for monitoring hemodynamics and recognizing gestures. The present invention can improve detection sensitivity and the ability to detect weak signals.

[0005] To achieve the above objectives, the present invention provides a wristband device, comprising: a wireless signal transmission module, multiple flexible film connection modules, and multiple optical sensor array modules, wherein the flexible film connection modules and the optical sensor array modules are spaced apart, the wireless signal transmission module is disposed on one of the optical sensor array modules, and the wireless signal transmission module is configured to transmit received electrical signals; the flexible film connection module is configured to connect to the optical sensor array modules; and the optical sensor array modules are configured to detect and collect ultrasonic echo signals, and convert the ultrasonic echo signals into electrical signals for transmission to the wireless signal transmission module.

[0006] Preferably, the number of the flexible film connection modules and the number of the optical sensor array modules are the same, that is, 8.

[0007] Preferably, the optical sensing array module includes: two polydimethylsiloxanes, a back substrate film, a polyimide film and a flexible optical substrate, wherein the back substrate film, the polyimide film and the flexible optical substrate are sequentially arranged between the two polydimethylsiloxanes, the polydimethylsiloxane is used to support the optical sensing array module, and the back substrate film is used to absorb back ultrasonic echo signals.

[0008] Preferably, the optical sensing array module further includes: a piezoelectric film upper electrode, a plurality of microring sensing units, a waveguide, a multilayer piezoelectric film and a piezoelectric film lower electrode, the microring sensing unit is coupled to the waveguide, the microring sensing unit and the piezoelectric film are spaced apart and arranged between the piezoelectric film upper electrode and the piezoelectric film lower electrode, and the microring sensing unit and the waveguide are coupled for signal transmission.

[0009] Preferably, the number of the microring sensor units is 16, the number of the piezoelectric films is 4 layers, every four microring sensor units form a microring sensor unit group, and each microring unit group is spaced apart from the piezoelectric film.

[0010] Preferably, the microring sensing unit and the waveguide are both made of chalcogenide materials, and the flexible optical substrate is made of silicon material.

[0011] To achieve the above-mentioned objectives, the present invention provides a flexible wristband system for monitoring hemodynamics and recognizing gestures, comprising the wristband device according to any one of claims 1 to 6, an electric pulse generating device, a signal light generating device, a control device, an information receiving, processing and display device, and a target to be measured, wherein the signal output end of the electric pulse generating device is electrically connected to the signal input end of the wristband device, the signal output end of the signal light generating device is connected to the signal input end of the wristband device via an optical fiber, and the signal input ends of the electric pulse generating device, the signal light generating device, and the information receiving, processing and display device are all connected to the signal output end of the control device.

[0012] The control device sends a first control signal to the electric pulse generating device, and the first control signal is used to control the intensity and pulse frequency of the ultrasonic excitation of the wristband device. The control device sends a second control signal to the signal light generating device, and the second control signal is used to control the wavelength and power of the light source output by the signal light generating device; the control device sends a third control signal to the information receiving, processing and display device, and the third control signal is used to control the rate at which the information receiving, processing and display device collects and demodulates signals; the control device, the electric pulse generating device and the signal light generating device work together to enable the wristband device to receive the ultrasonic echo signal generated by the target to be measured, and the wristband device and the information receiving, processing and display device work together to analyze the ultrasonic echo signal.

[0013] Preferably, the information receiving, processing and display device adopts an array-based digital optical frequency comb technology to de-mute the dimming signal.

[0014] Preferably, the signal light generating device and the wireless signal transmitting module are respectively connected to two adjacent optical sensor array modules.

[0015] Preferably, the information receiving, processing and display device uses a deep learning algorithm to process the optical signal to obtain the user's hemodynamic information, gesture recognition and reconstruct the vascular information image.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention uses an electric pulse generator to send an electric pulse signal to the piezoelectric film in the wristband. The piezoelectric film generates an ultrasonic signal and transmits it to the blood vessels and tissue structures inside the user's wrist. The target to be measured generates an ultrasonic echo signal and radiates outward from the inside of the user's wrist. The microcavity sensing components in the optical sensing array module made of multiple chalcogenide materials receive the ultrasonic echo signal and convert it into an optical signal. The optical signal is then converted into an electrical signal, and the electrical signal is transmitted to the wireless signal transmission module to complete the signal transmission. Finally, the back-end receiving device completes the display of hemodynamics and the recognition of gestures. The present invention improves the detection sensitivity and the ability to detect weak signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a structural diagram of a flexible wristband system for monitoring hemodynamics and recognizing gestures according to an embodiment of the present invention;

[0019] FIG2 is a structural diagram of a wristband device of a flexible wristband system for monitoring hemodynamics and recognizing gestures according to an embodiment of the present invention;

[0020] 3 is a structural cross-sectional view of a flexible wristband system for monitoring hemodynamics and recognizing gestures according to an embodiment of the present invention;

[0021] FIG4 is a top view of a flexible wristband system for monitoring hemodynamics and recognizing gestures according to an embodiment of the present invention;

[0022] FIG5 is a diagram of anterior and posterior blood vessel wall signals of a flexible wristband system for monitoring hemodynamics and recognizing gestures according to an embodiment of the present invention;

[0023] FIG6 is a pulse diagram of a flexible wristband system for monitoring hemodynamics and recognizing gestures according to an embodiment of the present invention.

[0024] Description of the numbers in the figure:

[0025] 1. Electric pulse generating device; 2. Signal light generating device; 3. Wristband device; 4. Control device; 5. Information receiving, processing and display device; 6. Target to be measured; 31. Wireless signal transmitting module; 32. Flexible film connection module; 33. Optical sensor array module; 331. Polydimethylsiloxane; 332. Back substrate film; 333. Polyimide film; 334. Flexible optical substrate; 335. Piezoelectric film upper electrode; 336. Microring sensor unit; 337. Waveguide; 338. Piezoelectric film; 339. Piezoelectric film lower electrode. Modes for Carrying Out the Invention

[0026] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0029] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0030] Example 1

[0031] As shown in Figures 2-4, a wristband device according to a preferred embodiment of the present invention includes: a wireless signal transmission module 31, multiple flexible film connection modules 32, and multiple optical sensor array modules 33. The flexible film connection modules 32 and optical sensor array modules 33 are spaced apart, and the number of flexible film connection modules and optical sensor array modules is the same, 8 each. The eight optical sensor array modules 33 are capable of recording ultrasonic information from the entire wrist. Through signal transmission and information reception processing by the wireless signal transmission module 31 and signal processing by the display device 5, hand gesture recognition is achieved. The wireless signal transmission module 31 is mounted on one of the optical sensor array modules 33 and is used to transmit received electrical signals. The flexible film connection module 32 is used to connect to the optical sensor array module. The optical sensor array module 33 is used to detect and collect ultrasonic echo signals, convert them into electrical signals, and transmit them to the wireless signal transmission module 31.

[0032] Furthermore, the optical sensor array module 33 comprises two polydimethylsiloxanes 331, a backing film 332, a polyimide film 333, and a flexible optical substrate 334. The backing film 332, polyimide film 333, and flexible optical substrate 334 are sequentially positioned between the two polydimethylsiloxanes 331. The polydimethylsiloxanes 331 provide support and protection for the overall structure while also enabling the flexible wristband system 3 to better conform to the skin surface, enabling ultrasonic signal transmission. The backing film 332 primarily absorbs ultrasonic signals from the back, preventing multiple reflections of the ultrasonic signal from affecting the data. The device also includes a piezoelectric film upper electrode 335, multiple microring sensor units 336, a waveguide 337, a multilayer piezoelectric film 338, and a piezoelectric film lower electrode 339. The microring sensor units 336 are coupled to the waveguide 337. The microring sensor units 336 and the piezoelectric film 338 are spaced apart between the piezoelectric film upper electrode 335 and the piezoelectric film lower electrode 339. The microring sensor units 336 and the waveguide 337 are coupled for signal transmission. There are 16 microring sensor units 336 and four layers of piezoelectric film 338. Every four microring sensor units 336 form a microring sensor unit group, and each microring sensor unit group is spaced apart from the piezoelectric film 338. Both the microring sensor unit 336 and the waveguide 337 are made of chalcogenide materials. Chalcogenide materials are non-oxide amorphous glasses formed by using elements from Group VIA of the periodic table (such as sulfur, selenium, and tellurium) as a base element and introducing other elements. Chalcogenide materials have advantages such as low Young's modulus, high photoelastic coefficient, excellent light field confinement, and continuously tunable component properties. The flexible optical substrate 334 is made of silicon.

[0033] Example 2

[0034] As shown in Figure 1, a flexible wristband system for monitoring hemodynamics and recognizing gestures in a preferred embodiment of an embodiment of the present invention includes: a wristband device 3, an electric pulse generating device 1, a signal light generating device 2, a control device 4, an information receiving, processing and display device 5 and a target to be measured 6. The signal output end of the electric pulse generating device 1 is electrically connected to the signal input end of the wristband device 3, the signal output end of the signal light generating device 2 is connected to the signal input end of the wristband device 3 through an optical fiber, the signal input ends of the electric pulse generating device 1, the signal light generating device 2 and the information receiving, processing and display device 5 are all connected to the signal output end of the control device 4, the signal light generating device 2 and the wireless signal transmitting module 31 are respectively connected to two adjacent optical sensor array modules 33, and the control device 4 is connected to the wireless signal transmitting module 31. The control device 4 sends a first control signal to the electric pulse generating device 1, and the first control signal is used to control the intensity and pulse frequency of the ultrasonic excitation of the wristband device 3. The control device 4 sends a second control signal to the signal light generating device 2, and the second control signal is used to control the wavelength and power of the light source output by the signal light generating device 2; the control device 4 sends a third control signal to the information receiving, processing and display device 5, and the third control signal is used to control the rate at which the information receiving, processing and display device 5 collects and demodulates signals; the control device 4, the electric pulse generating device 1 and the signal light generating device 2 work together, so that the wristband device can receive the ultrasonic echo signal generated by the target to be measured 6, and the wristband device 3 and the information receiving, processing and display device 5 work together to analyze the ultrasonic echo signal.

[0035] Example 3

[0036] As shown in Figures 5-6, a flexible wristband system for monitoring hemodynamics and recognizing gestures, according to a preferred embodiment of the present invention, employs an information receiving, processing, and display device 5 to decode and modulate optical signals using an array based on digital optical frequency comb technology. A deep learning algorithm is used to process the optical signals to acquire the user's hemodynamic information, recognize gestures, and reconstruct vascular information images.

[0037] The working principle of the present invention is as follows: the control device 4 sends a first control signal to the electric pulse generating device 1, so that the electric pulse generating device 1 sends an electric pulse signal to the piezoelectric film in the wristband, and the piezoelectric film generates an ultrasonic signal and transmits it to the blood vessels and tissue structures inside the user's wrist. The target to be measured 6 will generate an ultrasonic echo signal and radiate outward from the inside of the user's wrist. The control device 4 sends a second control signal to the signal light generating device 2, so that the signal light generating device 2 sends a laser signal to the wristband device. The laser signal then enters the optical sensor array 33. Multiple microcavity sensor components in the optical sensor array 33 module made of sulfur-based materials receive the ultrasonic echo signal and convert it into an optical signal, and then convert the optical signal into an electrical signal, and transmit the electrical signal to the wireless signal transmission module to complete the signal transmission. Finally, the back-end receiving device 5 completes the display of hemodynamics and gesture recognition.

[0038] In summary, an embodiment of the present invention provides a flexible wristband system for monitoring hemodynamics and recognizing gestures. It uses an electric pulse generating device to send an electric pulse signal to the piezoelectric film in the wristband. The piezoelectric film generates an ultrasonic signal and transmits it to the blood vessels and tissue structures inside the user's wrist. The target to be measured will generate an ultrasonic echo signal and radiate outward from the inside of the user's wrist. The microcavity sensing components in the optical sensing array module made of multiple chalcogenide materials receive the ultrasonic echo signal and convert it into an optical signal, and then convert the optical signal into an electrical signal, and transmit the electrical signal to the wireless signal transmission module to complete the signal transmission. Finally, the back-end receiving device completes the display of hemodynamics and the recognition of gestures. The present invention improves the detection sensitivity and the ability to detect weak signals.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A wristband device, characterized in that: include: A wireless signal transmission module (31), a plurality of flexible film connection modules (32) and a plurality of optical sensor array modules (33), wherein the flexible film connection modules (32) and the optical sensor array modules (33) are arranged at intervals, the wireless signal transmission module (31) is arranged on one of the optical sensor array modules (33), and the wireless signal transmission module (31) is used to transmit a received electrical signal; The flexible film connection module (32) is used to connect to the optical sensor array module (33); the optical sensor array module (33) is used to detect and collect ultrasonic echo signals, and convert the ultrasonic echo signals into electrical signals for transmission to the wireless signal transmission module (31).

2. A wristband device according to claim 1, characterized in that: The number of the flexible film connection modules (32) and the number of the optical sensing array modules (33) are the same, both being eight.

3. The wristband device according to claim 1, wherein: The optical sensing array module (33) comprises: two polydimethylsiloxanes (331), a back substrate film (332), a polyimide film (333) and a flexible optical substrate (334), wherein the back substrate film (332), the polyimide film (333) and the flexible optical substrate (334) are sequentially arranged between the two polydimethylsiloxanes (331), the polydimethylsiloxanes (331) are used to support the optical sensing array module (33), and the back substrate film (332) is used to absorb back ultrasonic echo signals.

4. A wristband device according to claim 3, characterized in that: The optical sensing array module (33) further includes: a piezoelectric film upper electrode (335), a plurality of micro-ring sensing units (336), a waveguide (337), a multilayer piezoelectric film (338) and a piezoelectric film lower electrode (339), wherein the micro-ring sensing unit (336) is coupled with the waveguide (337), and the micro-ring sensing unit (336) and the piezoelectric film (338) are spaced apart between the piezoelectric film upper electrode (335) and the piezoelectric film lower electrode (339), and the micro-ring sensing unit (336) and the waveguide (337) are coupled for signal transmission.

5. The wristband device according to claim 4, characterized in that: The number of the micro-ring sensing units (336) is 16, the number of the piezoelectric film (338) is 4 layers, every four micro-ring sensing units (336) form a micro-ring sensing unit group, and each micro-ring unit group is spaced apart from the piezoelectric film (338).

6. A wristband device according to claim 5, characterized in that: The micro-ring sensing unit (336) and the waveguide (337) are both made of sulfur-based materials, and the flexible optical substrate (334) is made of silicon material.

7. A flexible wristband system for monitoring hemodynamics and recognizing gestures, characterized in that: The invention comprises a wristband device (3) as claimed in any one of claims 1 to 6, an electric pulse generating device (1), a signal light generating device (2), a control device (4), an information receiving, processing and display device (5) and a target to be measured (6), wherein the signal output end of the electric pulse generating device (1) is electrically connected to the signal input end of the wristband device (3), the signal output end of the signal light generating device (2) is connected to the signal input end of the wristband device (3) via an optical fiber, and the signal input ends of the electric pulse generating device (1), the signal light generating device (2) and the information receiving, processing and display device (5) are all connected to the signal output end of the control device (4). The control device (4) sends a first control signal to the electric pulse generating device (1), and the first control signal is used to control the intensity and pulse frequency of the ultrasonic excitation of the wristband device (3); the control device (4) sends a second control signal to the signal light generating device (2), and the second control signal is used to control the wavelength and power of the light source output by the signal light generating device (2); the control device (4) sends a third control signal to the information receiving, processing and display device (5), and the third control signal is used to control the rate at which the information receiving, processing and display device (5) collects and demodulates signals; the control device (4), the electric pulse generating device (1) and the signal light generating device (2) work together, so that the wristband device can receive the ultrasonic echo signal generated by the target to be measured (6), and the wristband device (3) and the information receiving, processing and display device (5) work together to analyze the ultrasonic echo signal.

8. The flexible wristband system for monitoring hemodynamics and recognizing gestures according to claim 7, characterized in that: The information receiving, processing and display device (5) adopts an array based on digital optical frequency comb technology to de-mute the dimming signal.

9. The flexible wristband system for monitoring hemodynamics and recognizing gestures according to claim 7, characterized in that: The signal light generating device (2) and the wireless signal transmitting module (31) are respectively connected to two adjacent optical sensing array modules (33).

10. The flexible wristband system for monitoring hemodynamics and recognizing gestures according to claim 7, characterized in that: The information receiving, processing and display device (5) uses a deep learning algorithm to process light signals, thereby obtaining the user's hemodynamic information, gesture recognition and reconstructing a vascular information image.

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