Human health monitoring bracelet based on microwave wireless energy transmission and preparation method

Abstract

According to the human health monitoring bracelet based on microwave wireless energy transmission and the preparation method thereof, a flexible receiving antenna is responsible for receiving microwave energy, and the received microwave energy source is a special microwave energy transmitter deployed in a specific space and electromagnetic energy in a living environment; the power supply management module converts the microwave electromagnetic energy received by the flexible antenna into stable and sustainable energy through the rectification circuit, the matching circuit and the voltage stabilizing circuit, and outputs the energy, thereby achieving the wireless transmission of the energy. And the converted energy is used for supplying power to the physiological monitoring system. Meanwhile, the low-power-consumption single-chip microcomputer carries a sensor module to monitor the body temperature, blood oxygen and movement postures of the human body in real time, and data are uploaded to a cloud platform through a Bluetooth module. Wireless charging is carried out by adopting a microwave wireless energy transmission technology, the problem that regular charging is needed is solved, in addition, a flexible material is used as a support, the wearing comfort of the bracelet is improved, the cost is saved, and the bracelet is green and environment-friendly.

Description

Technical Field

[0001] The present invention belongs to the field of microwave wireless energy transmission and intelligent manufacturing, and specifically relates to a human health monitoring wristband based on microwave wireless energy transmission and a preparation method thereof. Background Art

[0002] Electromagnetic waves are the carriers of microwave energy. Their study has opened humanity to high-speed information channels. Furthermore, wireless energy transmission through electromagnetic waves has brought new vitality to energy transmission. Hertz's experiments in the 19th century demonstrated the ability of microwave energy to be transmitted through space, opening up new avenues for human communications.

[0003] The emergence of intelligent manufacturing technology has provided new ideas for production and manufacturing. Among them, 3D printing technology, different from subtractive manufacturing, adopts additive manufacturing, which saves the use of materials and provides the possibility for complex structural design of products.

[0004] However, traditional 3D printing is difficult to print on curved platforms because it uses a flat layer stacking printing method. The present invention changes the motion trajectory of traditional 3D printing during the printing process through algorithm design, and realizes integrated printing on arm-like curved surfaces. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art. It proposes a human health monitoring wristband based on microwave wireless energy transmission and its preparation method. The present invention aims to provide a power supply method that is different from the battery power supply of traditional smart wristbands. It is equipped with a dual-band flexible receiving antenna to receive electromagnetic energy from fixed electromagnetic energy transmitters and daily life, and converts this energy into stable and sustainable energy through designed modules. The ultimate goal is to improve the user experience when using the smart wristband to monitor and evaluate their own physiology and enhance user comfort. At the same time, the flexible receiving antenna is prepared through conformal printing, which reduces the gap between the electrical parameters of the actual product and the simulation, further enhancing the energy conversion efficiency.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A human health monitoring bracelet based on microwave wireless energy transmission includes a dual-band conformal flexible receiving antenna and a flexible PCB circuit board integrating various modules. The flexible PCB circuit board integrates a power management module and a human health monitoring system. The power management module in the flexible PCB circuit board includes a rectifier circuit part, a matching circuit part, a voltage stabilizing circuit part, and a solar energy collection panel, which serve as the power supply module of the bracelet. The human health monitoring system consists of a low-power single-chip microcomputer main control module, a sensor module, and a Bluetooth module. The flexible receiving antenna is connected to the flexible PCB circuit board through an SMA connector.

[0007] As a further improvement of the present invention, the flexible receiving antenna is prepared by conformal 3D printing, the radiating main body of the flexible receiving antenna is made of liquid metal material used for metal 3D printing, and is printed on a modified dielectric material by 3D printing technology, and a flexible material is selected as the substrate. The main receiving frequency of the flexible receiving antenna is determined by the microwave energy frequency emitted by the selected fixed microwave energy transmitting station, and the secondary receiving frequency is selected from the microwave signal frequency band.

[0008] As a further improvement of the present invention, the radiating main body of the flexible receiving antenna is made into a micro-mesh metal structure by metal 3D printing, and the micro-mesh metal structure is used to prepare an optically transparent flexible antenna, which is convenient for integration with a flexible solar collection panel without affecting the energy collection of the solar panel.

[0009] As a further improvement of the present invention, the rectifier circuit part is composed of four Schottky diodes to form a full-bridge circuit, the matching circuit part uses series-parallel inductors and capacitors to match the load end impedance with the power supply end impedance, and the voltage stabilizing circuit part provides a stable 3.3V voltage to the low-power microcontroller main control module through a buck-boost module, a voltage stabilizing chip and capacitor filtering.

[0010] The present invention provides a method for preparing a human health monitoring wristband based on microwave wireless energy transmission, and the specific steps are as follows: Step 1: First, use a scanner to scan the user's arm to obtain a three-dimensional model of the arm; Step 2: The 3D model of the arm is then imported into the simulation software. The flexible receiving antenna and substrate are then conformally placed on the 3D model of the user's arm for simulation and parameter adjustment. The electrical parameters of the flexible receiving antenna are adjusted to match the designed electromagnetic wave frequency band. Step 3. Finally, the three-dimensional model of the user's arm is printed and prepared by the FDM process in 3D printing, and it is used as a support platform for the printing and preparation of the flexible receiving antenna. The nozzles of the multi-nozzle printer used are pneumatic extrusion nozzles and piezoelectric micro-nozzles. The arm model is fixed on the printing platform, and the three-dimensional position positioning is used to ensure that the printing position of the flexible receiving antenna on the arm model is consistent with the position during simulation. Then, the conformal printing algorithm is used to prepare the flexible receiving antenna on the curved surface of the arm model. At the same time, the solar energy collection panel is placed under the optically transparent flexible receiving antenna. The flexible PCB circuit board is prepared by the intelligent robot arm identifying and grasping the device and placing it in a preset position. After that, the piezoelectric micro-nozzle is used to print as a wire, and then the pneumatic nozzle is used to extrude the flexible material for coating. Finally, the flexible receiving antenna and the flexible PCB circuit board are connected through the SMA connector to obtain this human health monitoring bracelet based on microwave wireless energy transmission.

[0011] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. The energy supply of the human health monitoring bracelet is provided by a flexible dual-band receiving antenna that receives electromagnetic wave energy from a fixed electromagnetic energy transmitter and recycles electromagnetic energy and solar energy in daily life, eliminating the complicated charging process and recycling the electromagnetic wave energy wasted in daily life, which is green and environmentally friendly.

[0012] 2. The flexible receiving antenna is made of a micro-grid metal structure to form an optically transparent flexible antenna, which is easy to superimpose on the solar collecting panel without affecting the light, greatly improving the energy transfer efficiency.

[0013] 3. The flexible dual-band receiving antenna produced through conformal 3D printing technology greatly reduces the gap between the parameters of the actual printed product and the parameters obtained by simulation using the 3D model of the user's arm. It also reduces the deformation of the printed flat product caused by the curvature of the human arm during actual wear, which affects the performance parameters of the product and reduces the energy loss caused by the change in performance parameters.

[0014] 4. Compared with traditional human body monitoring bracelets, this bracelet can adjust the receiving frequency band of the flexible receiving antenna so that it cannot be used when it deviates from the fixed microwave signal emission source. When used in public places such as gyms, it can effectively limit the scope of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing the process of the scanner of the present invention scanning a three-dimensional model of a user's arm; Figure 2 This is a schematic diagram of a flexible receiving antenna prepared by conformal 3D printing using parameters adjusted by simulation software. Figure 3 This is a schematic diagram of the connection between the flexible receiving antenna and the micro PCB circuit board, where 1-flexible receiving antenna, 2-flexible PCB circuit board; 3-power management module; 4-rectifier circuit part; 5-matching circuit part; 6-voltage regulator circuit part; 7-low-power microcontroller main control module; 8-sensor module; 9-Bluetooth module; 10-solar collector; 11-SMA connector; Figure 4 It is a schematic diagram of the internal electrical connections of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: The present invention also discloses a method for preparing a human health monitoring wristband based on microwave wireless energy transmission, wherein the internal electrical connection diagram is as follows Figure 4 As shown, the following steps are included: Step 1: First, Figure 1 The user's arm is scanned with a scanner to obtain a three-dimensional model of the arm; Step 2: The 3D model of the arm is then imported into the simulation software. The dual-band flexible antenna and substrate are then conformally placed on the 3D model of the user's arm for simulation and parameter adjustment. The electrical parameters of the dual-band flexible antenna are adjusted to match the designed electromagnetic wave frequency band. Step 3, finally Figure 2 As shown, a three-dimensional model of the user's arm is printed and prepared using the FDM process in 3D printing, and used as a support platform for printing and preparing the flexible antenna. The nozzles of the multi-nozzle printer used are pneumatic extrusion nozzles and piezoelectric micro-nozzles. The arm model is fixed to the printing platform. The three-dimensional position positioning ensures that the printing position of the flexible antenna on the arm model is consistent with the position during simulation. Then, a conformal printing algorithm is used to prepare the flexible antenna on the curved surface of the arm model. At the same time, a solar collector is placed under the optically transparent flexible antenna. The flexible PCB circuit board is prepared by an intelligent robot arm identifying and grasping the device and placing it in a preset position. Then, a piezoelectric micro-nozzle is used to print (nanosilver) as a conductor, and a pneumatic nozzle is used to extrude the flexible material for coating. Finally, the flexible antenna and PCB are connected via SMA connector 11 to obtain this human health monitoring bracelet based on microwave wireless energy transmission.

[0017] In terms of the flexible dual-band receiving antenna structure, a digital three-dimensional model of the user's arm is obtained by performing a three-dimensional scan of the user's arm. Based on this model, the model is imported into the simulation software, and the flexible dual-band receiving antenna is conformally simulated and adjusted on the model to determine the optimal antenna structure. After printing out the flexible receiving antenna 1 we prepared, the entire flexible PCB circuit board 2 is connected to the flexible receiving antenna 1 through the SMA connector 11. In order to reduce the overall size of the bracelet and increase the comfort of wearing the bracelet, the power management module 3 of the bracelet and the entire human health monitoring system are all integrated on the flexible PCB circuit board 2. The circuit logic of the entire micro PCB board is as follows: Figure 3As shown, the rectifier circuit 4 is directly connected to the feeder line of the SMA connector 11, converting the AC power transmitted by the SMA connector 11 into DC power. The matching circuit 5 increases energy transmission efficiency by matching the impedance of the load end with the power end; it also reduces irrelevant losses. The voltage stabilization circuit 6 stabilizes the output power of the power supply module through a step-up / step-down converter and a voltage regulator. A flexible solar panel 10 is used to ensure stable power supply to the low-power microcontroller main control module 7. The sensor module 8 is connected to the main control microcontroller module and transmits the collected physiological parameters to the low-power microcontroller main control module 7 via a serial port. The Bluetooth module 9 is connected to another serial port of the low-power microcontroller main control module 7 and transmits the physiological parameters via the Bluetooth module. The microcontroller module is also equipped with an LED indicator and a buzzer, which are used in conjunction with the sensor.

[0018] When the power management module 3 starts to power the low-power single-chip microcomputer main control module 7, the entire system begins to work in coordination, wherein the sensor module 8 is connected to the low-power single-chip microcomputer main control module 7. When the user's various vital signs are detected, the sensor module 8 packages all of this data and transmits it to the low-power single-chip microcomputer main control module 7. The low-power single-chip microcomputer main control module 7, as the core brain, processes this data and transmits it to the cloud platform via the Bluetooth module 9. The cloud platform transmits data to the user's mobile phone or computer, and through data visualization editing, the user can view it on the mobile phone app or computer web page. When the vital signs or physiological parameter information is not within the normal range, the LED indicator will light up red and the buzzer will continue to sound as a warning. The patient's heart rate and blood oxygen sensor can also be directly viewed through the mobile phone app or web page.

[0019] The sensor module is one or more of a temperature sensor, a humidity sensor, a pressure sensor, a heart rate sensor, a blood oxygen sensor, and a posture sensor, and can be used in combination according to actual needs. The temperature sensor mainly measures the patient's body temperature, and can also be customized to add semiconductor hot and cold compresses to work together. When the data information transmitted to the microcontroller by the temperature sensor shows that the user's body temperature is within the normal range, the microcontroller main control will control the semiconductor hot and cold compresses according to the actual situation. It can also be operated using a mobile phone app or a web page to transmit information through the Bluetooth module to the microcontroller, and the microcontroller controls the semiconductor hot and cold compresses to perform cold or hot compresses. Other sensors can also be customized to add similar functions. In order to effectively reduce costs and facilitate quick judgment of the situation, the present invention can not only directly interact with the mobile phone app and the web page through the Bluetooth module, but also use different color LED indicators to reflect the user's various vital signs. For example, the LED indicators include a low heart rate indicator, a low heart rate indicator, a normal heart rate indicator, etc., and different indicators are displayed in different cold colors.

[0020] Working principle: Based on the microwave energy transmitting station set up at the application site and other microwave energy in the surrounding environment, a flexible receiving antenna with a corresponding receiving frequency band is prepared, and a flexible solar energy collection device is integrated to obtain stable and sustainable energy.

[0021] The required sensor modules are selected based on needs and manufactured on-site. Once 3D printing is complete, the health monitoring wristband is ready for use. The wristband is worn on the inside of the user's wrist, with the sensor module aligned as closely as possible to the patient's wrist to improve sensor accuracy. Once the user enters the appropriate range of motion, the power management module begins supplying power, the power LED indicator lights up, the physiological parameter monitoring patch begins operating, and the sensor module begins sensing the user's body temperature, blood oxygen concentration, and other parameters, feeding this data back to the microcontroller module. The microcontroller module processes the data and controls the LED indicator to turn on and off, and to flash different colors.

[0022] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent variation based on the technical essence of the present invention shall still fall within the scope of protection claimed by the present invention.

Claims

1. A human health monitoring bracelet based on microwave wireless energy transmission, characterized in that: The invention comprises a dual-band conformal flexible receiving antenna (1) and a flexible PCB circuit board (2) integrating various modules. The flexible PCB circuit board (2) is integrated with a power management module (3) and a human health monitoring system. The power management module (3) in the flexible PCB circuit board (2) comprises four parts, namely a rectifier circuit part (4), a matching circuit part (5), a voltage stabilizing circuit part (6) and a solar energy collection panel (10), which serve as a power supply module for the wristband. The human health monitoring system is composed of a low-power single-chip microcomputer main control module (7), a sensor module (8) and a Bluetooth module (9). The flexible receiving antenna (1) is connected to the flexible PCB circuit board (2) via an SMA connector (11).

2. The human health monitoring bracelet based on microwave wireless energy transmission according to claim 1, characterized in that: The flexible receiving antenna (1) is prepared by conformal 3D printing, the radiation main body part of the flexible receiving antenna (1) is made of liquid metal material used for metal 3D printing, is printed on a modified dielectric material by 3D printing technology, and a flexible material is selected as a substrate, the main receiving frequency of the flexible receiving antenna (1) is determined by the microwave energy frequency emitted by the selected fixed microwave energy transmitting station, and the secondary receiving frequency is selected from the microwave signal frequency band.

3. The human health monitoring bracelet based on microwave wireless energy transmission according to claim 2 is characterized in that: The radiation main body part of the flexible receiving antenna (1) is made into a micro-mesh metal structure by metal 3D printing.

4. The human health monitoring bracelet based on microwave wireless energy transmission according to claim 1, characterized in that: The rectifier circuit part (4) is composed of four Schottky diodes forming a full-bridge circuit, the matching circuit part (5) uses a series-parallel inductor and capacitor to match the load end impedance with the power supply end impedance, and the voltage stabilization circuit part (6) provides a stable 3.3V voltage to the low-power single-chip microcomputer main control module (7) through a buck-boost module, a voltage stabilization chip and capacitor filtering.

5. The method for preparing a human health monitoring bracelet based on microwave wireless energy transmission according to any one of claims 1 to 4, characterized in that: The specific steps are as follows: Step 1: First, use a scanner to scan the user's arm to obtain a three-dimensional model of the arm; Step 2, then import the three-dimensional model of the arm into the simulation software, and then conformally place the flexible receiving antenna (1) and the substrate on the three-dimensional model of the user's arm to perform simulation parameter adjustment, and adjust the electrical parameters of the flexible receiving antenna (1) to match the designed electromagnetic wave frequency band; Step 3: Finally, the three-dimensional model of the user's arm is printed and prepared by the FDM process in 3D printing, and used as a support platform for printing and preparing the flexible receiving antenna (1). The nozzles of the multi-nozzle printer used are pneumatic extrusion nozzles and piezoelectric micro nozzles. The arm model is fixed on the printing platform. The printing position of the flexible receiving antenna (1) on the arm model is ensured to be consistent with the position during simulation through three-dimensional position positioning. Then, a conformal printing algorithm is used to prepare the flexible receiving antenna (1) on the curved surface of the arm model. At the same time, a solar energy collection panel (10) is placed under the optically transparent flexible receiving antenna (1). The flexible PCB circuit board (2) is prepared by the intelligent manipulator to identify and grasp the device and place it at a preset position. Then, a piezoelectric micro nozzle is used to print as a conductor, and then a pneumatic nozzle is used to extrude a flexible material for coating. Finally, the flexible receiving antenna (1) and the flexible PCB circuit board (2) are connected through an SMA connector (11) to obtain this human health monitoring bracelet based on microwave wireless energy transmission.

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