Physical sign parameter acquisition system, device and equipment for medical internet of things

Abstract

The invention discloses a physical sign parameter acquisition system, device and equipment for a medical internet of things. The physical sign parameter acquisition system comprises a data acquisition module, a data processing module, a communication module and a power management module, the output end of the data acquisition module is connected with the input end of the data processing module, the output end of the data processing module is connected with the input end of the communication module, and the output end of the communication module is in wireless / wired connection with the Internet of Things; the output end of the power management module is connected with the power ends of the data acquisition module, the data processing module and the communication module.

Description

Technical Field

[0001] This invention relates to the field of medical Internet of Things (IoT) technology, and in particular to a vital sign parameter acquisition system, device, and equipment for medical IoT. Background Technology

[0002] With the rapid development of the Internet of Medical Things (IoMT), vital sign parameter acquisition systems, as core devices of the sensing layer, play a crucial role in smart healthcare and health monitoring.

[0003] Currently, the industry faces several technical challenges in the vital sign data acquisition process. First, most systems employ constant voltage or constant current temperature measurement schemes, requiring external A / D converters and amplifier circuits, resulting in high overall power consumption and battery life of only a few days, necessitating frequent charging. Second, component selection and circuit layout are not fully optimized, making it difficult for system size to meet wearable application requirements. Third, body temperature acquisition is susceptible to power supply voltage fluctuations, ECG signals are significantly affected by power frequency interference, and blood oxygen calculation algorithms have low accuracy. Fourth, some wireless communication modules use custom protocols, making interconnection with standardized medical IoT systems difficult, leading to low data transmission reliability. Summary of the Invention

[0004] To address the problem that the acquisition and transmission of vital signs parameters in existing technologies are easily affected by external factors, resulting in low acquisition and transmission accuracy, this invention proposes a vital signs parameter acquisition system, device, and equipment for the Internet of Things in healthcare.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A vital signs parameter acquisition system for medical Internet of Things includes a data acquisition module, a data processing module, a communication module, and a power management module;

[0007] The output of the data acquisition module is connected to the input of the data processing module, the output of the data processing module is connected to the input of the communication module, and the output of the communication module is connected to the Internet of Things (IoT) wirelessly / wiredly. The output of the power management module is connected to the power supply terminals of the data acquisition module, the data processing module, and the communication module, respectively.

[0008] Preferably, it also includes a storage module for storing the vital signs signals acquired by the data acquisition module and the vital signs parameters calculated by the data processing module.

[0009] Preferably, the data processing module is disposed on the first PCB board; the power management module is disposed on the second PCB board; the ground wire is disposed on the third PCB board; and the communication module is disposed on the fourth PCB board.

[0010] Preferably, the data acquisition module includes a body temperature acquisition unit, an electrocardiogram (ECG) acquisition unit, and a blood oxygen acquisition unit; wherein, the body temperature acquisition unit is used to acquire body temperature signals; the ECG acquisition unit is used to acquire ECG signals; and the blood oxygen acquisition unit is used to acquire blood oxygen signals.

[0011] Preferably, the specific circuit of the body temperature acquisition unit is as follows:

[0012] The first output terminal of the data processing module is connected to one end of the thermistor, the second output terminal of the data processing module is connected to one end of the reference resistor, the other end of the thermistor, the other end of the reference resistor, and one end of the first capacitor are connected in parallel and then connected to the signal input terminal of the data processing module, and the other end of the first capacitor is grounded.

[0013] Preferably, the electrocardiogram acquisition unit uses a BMD101 biosignal processing chip; the blood oxygen acquisition unit uses a dual-wavelength phototransistor with red and infrared light.

[0014] Preferably, the data processing module includes a control unit, an initialization unit, a feature parameter calculation unit, a data encapsulation unit, and a power consumption management unit;

[0015] The system includes: a control unit for processing and forwarding various data, and for controlling the charging and discharging of the body temperature acquisition unit; an initialization unit for initializing the control unit, the feature parameter calculation unit, and the power management unit; a feature parameter calculation unit for calculating feature parameters based on the acquired vital signs signals; a data encapsulation unit for encapsulating the vital signs parameters according to a preset data frame format and sending them to the communication module; and a power management unit for putting each unit and module into sleep mode and waking it up.

[0016] Preferably, the power management module includes a battery unit, a button control unit, and an output unit; the output terminal of the battery unit is connected to the input terminal of the button control unit, the output terminal of the button control unit is connected to the input terminal of the output unit, and the output terminal of the output unit is connected to the power supply terminal of each module.

[0017] The present invention also provides a device for medical Internet of Things, including a vital sign parameter acquisition system for medical Internet of Things, a coordinator and a host computer; the output end of the vital sign parameter acquisition system is connected to the input end of the coordinator, and the output end of the coordinator is connected to the input end of the host computer.

[0018] The vital signs parameter acquisition system, as the sensing layer, is used to collect vital signs parameters;

[0019] As the core of the network layer, the coordinator is responsible for receiving vital signs parameters sent by multiple vital signs parameter acquisition systems, and then summarizing and forwarding the vital signs parameters to the host computer.

[0020] The host computer, as an application layer device, is used for data storage, analysis, and display. When abnormal vital signs occur, the host computer can issue an alarm.

[0021] The present invention also provides a monitoring device for the Internet of Things in healthcare, which integrates a vital sign parameter acquisition system for the Internet of Things in healthcare; the monitoring device includes a wristband, a chest patch, and a portable monitor.

[0022] In summary, by adopting the above technical solution, the present invention has at least the following beneficial effects compared with the prior art:

[0023] This invention achieves the design goals of low power consumption, miniaturization, and high precision through optimized module design and component selection. It boasts low power consumption, with a battery life exceeding 30 days; small size, with a PCB board dimensions of only 20mm × 30mm, making it suitable for wearable devices; high measurement accuracy, with all vital signs parameters meeting medical-grade standards; and strong compatibility, supporting standardized protocols for seamless integration into medical IoT systems.

[0024] Meanwhile, the medical IoT system and medical monitoring equipment built on this node have expanded its application scenarios and provided new solutions for the field of medical and health monitoring. Attached image description:

[0025] Figure 1 This is a schematic diagram of a vital sign parameter acquisition system for medical Internet of Things according to an exemplary embodiment 1 of the present invention.

[0026] Figure 2 This is a schematic diagram of the data acquisition module structure according to an exemplary embodiment 1 of the present invention.

[0027] Figure 3 This is a schematic diagram of a body temperature acquisition unit circuit according to an exemplary embodiment 1 of the present invention.

[0028] Figure 4 This is a schematic diagram of the data processing module structure according to an exemplary embodiment 1 of the present invention.

[0029] Figure 5 This is a schematic diagram of a power management module circuit according to an exemplary embodiment 1 of the present invention.

[0030] Figure 6 This is a schematic diagram of a device for medical Internet of Things according to an exemplary embodiment 2 of the present invention. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to embodiments and specific implementation methods. However, this should not be construed as limiting the scope of the above-described subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0032] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Example 1

[0034] like Figure 1 As shown, the present invention provides a vital sign parameter acquisition system for medical Internet of Things, including a data acquisition module, a data processing module, a communication module, and a power management module; the output end of the data acquisition module is connected to the input end of the data processing module, the output end of the data processing module is connected to the input end of the communication module, and the output end of the communication module is wirelessly / wiredly connected to the Internet of Things; the output end of the power management module is connected to the power supply ends of the data acquisition module, the data processing module, and the communication module respectively.

[0035] The data acquisition module is used to collect vital signs signals, including temperature signals, electrocardiogram signals, and blood oxygenation signals.

[0036] The data processing module is used to calculate the corresponding vital signs parameters based on the vital signs signals.

[0037] The communication module is used to transmit vital signs parameters to the Internet of Things for easy storage and viewing.

[0038] The power management module is used to provide power to all modules.

[0039] In this embodiment, a storage module is also included to store the vital signs signals collected by the data acquisition module and the vital signs parameters calculated by the data processing module, so as to facilitate subsequent tracing.

[0040] In this embodiment, a four-layer PCB board is also included, each measuring 20mm × 30mm, adapted for wearable devices: the data processing module is located on the first PCB board; the power management module is located on the second PCB board; the ground wire is located on the third PCB board; and the communication module is located on the fourth PCB board. This design effectively reduces electromagnetic interference between the modules, ensuring stable operation of each module, thereby avoiding the influence of power supply voltage fluctuations in body temperature acquisition and the impact of power frequency interference on electrocardiogram signals, and improving the accuracy of the acquired data.

[0041] like Figure 2As shown, the data acquisition module includes a body temperature acquisition unit, an electrocardiogram (ECG) acquisition unit, and a blood oxygen acquisition unit. The body temperature acquisition unit is used to acquire body temperature signals; the ECG acquisition unit is used to acquire ECG signals; and the blood oxygen acquisition unit is used to acquire blood oxygen signals.

[0042] like Figure 3 As shown, the specific circuit of the body temperature acquisition unit is as follows:

[0043] The first output terminal (OUT1) of the data processing module U1 is connected to the thermistor R. X One end is connected to the second output terminal (OUT2) of the data processing module U1 and the reference resistor R. ref One end is connected to the thermistor R X The other end, reference resistor R ref The other end of the capacitor and one end of the first capacitor C1 are connected in parallel and then connected to the signal input terminal (IN) of U1. The other end of the first capacitor C1 is grounded.

[0044] In this embodiment, the thermistor R X Reference resistor R ref Together with the first capacitor C1, they form an RC charging and discharging circuit. The thermistor R... X The MF51-E-503-F-3950 model is selected, with an operating temperature range of -40 to 100℃, capable of meeting the body temperature monitoring needs in various scenarios, and achieving a measurement accuracy of ±0.03℃; the reference resistor R... ref A 30KΩ precision resistor with an accuracy of 0.5% is selected; the first capacitor C1 is a 0.1μF polystyrene capacitor to ensure the stability of the charging and discharging process.

[0045] In this embodiment, the working principle of the body temperature acquisition unit is as follows:

[0046] The second output terminal of the data processing module U1 outputs a high level, which is transmitted through the reference resistor R. ref The first capacitor C1 is charged to VCC, and the charging time is set to 5 × R. ref ×C1; Subsequently, the second output terminal is set to a high-impedance state, the first output terminal outputs a low level, and the first capacitor C1 passes through the thermistor R. X Discharge, timer records discharge up to V ref (0.25VCC) time T x Similarly, the reference resistance R was measured. ref Discharge time T ref Finally, through formula R X =T x ×R ref / T ref The thermistor R was calculated. X The body temperature parameter is obtained by combining the resistance value of the thermistor with the resistance-temperature fitting function.

[0047] In this embodiment, the ECG acquisition unit uses the BMD101 biosignal processing chip, which integrates a low-noise amplifier, a 16-bit ADC converter, a notch filter, and a low-pass filter. It can directly acquire weak ECG signals at the μV level and effectively filter out 50 / 60Hz power frequency interference.

[0048] In the ECG acquisition unit, the BMD101 chip receives ECG signals through the SEP and SEN pins. The DC component is filtered out by an internal high-pass filter in the BMD101 chip, and the ECG signal is amplified by a low-noise amplifier. Then, a 16-bit ADC converter converts the amplified ECG signal into a digital signal. The digital signal is processed by a 50 / 60Hz notch filter and a 100Hz low-pass filter before being output to the data processing module through the TX pin. In addition, the ECG acquisition unit also includes a sensor detachment detection circuit. When the resistance between the input pins (i.e., the EP and SEN pins) exceeds a preset resistance threshold (19-25MΩ), an interrupt is triggered (indicating sensor detachment). This can be indicated by sound or light to remind the user to adjust the sensor position promptly.

[0049] In this embodiment, the blood oxygen acquisition unit employs a dual-wavelength photodiode using red light (660nm) and infrared light (940nm). It utilizes the difference in absorption of different wavelengths of light by arterial blood to acquire pulse wave signals and outputs them to the data processing module. The data processing module performs peak detection and feature extraction on the acquired pulse wave signals, and calculates blood oxygen saturation using Lambert-Beer's law. Its measurement range is 70%-100%, with an accuracy of ±2%, meeting the needs of daily health monitoring and medical auxiliary monitoring.

[0050] like Figure 4 As shown, the data processing module includes a control unit, an initialization unit, a feature parameter calculation unit, a data encapsulation unit, and a power management unit; the initialization unit, feature parameter calculation unit, data encapsulation unit, and power management unit are all bidirectionally electrically connected to the control unit.

[0051] The system comprises the following components: a control unit for processing and forwarding various data, and for controlling the charging and discharging of the body temperature acquisition unit; an initialization unit for initializing the control unit, feature parameter calculation unit, and power management unit, and configuring peripheral devices such as GPIO, UART, timers, and comparators; a feature parameter calculation unit for calculating feature parameters based on the acquired vital signs signals, such as peak detection and feature extraction of pulse wave signals, and calculating blood oxygen saturation using Lambert-Beer law; a data encapsulation unit for encapsulating vital signs parameters according to a preset data frame format and sending them to the communication module; and a power management unit for putting each unit into sleep mode and waking it up to reduce power consumption.

[0052] In this embodiment, the control unit is an MSP430F2370 (developed using the IAR EW430 development environment), a 16-bit RISC architecture with an operating voltage range of 1.8V-3.6V, suitable for low-power supply requirements. It integrates a rich set of peripherals, including an analog comparator, timer, 12-bit ADC, and UART interface. No additional amplifier circuitry or A / D chip is required; the built-in comparator and timer can form an integrating A / D converter, directly achieving analog-to-digital conversion of vital signs.

[0053] In terms of power consumption, the control unit operates at a current of only 270μA at a 1MHz clock speed, and its power consumption in RAM hold mode is as low as 0.1μA. It also supports 1μs fast wake-up, which significantly reduces power consumption in non-working states. At the same time, it has strong 16-bit fixed-point computing capabilities, which can complete algorithms such as body temperature fitting, ECG R-wave recognition, and blood oxygen calculation in real time with a processing latency of less than 100ms, ensuring data real-time performance.

[0054] In this embodiment, the control unit has a reserved JTAG interface for program burning, which facilitates later updates and debugging of the system program; a reserved test interface is provided for parameter calibration to ensure the system measurement accuracy.

[0055] In this embodiment, the data encapsulation unit communicates with the communication module via a UART interface, with the baud rate set to 38400bps to ensure data transmission rate. The data encapsulation unit adopts a custom data frame format, specifically defined as 2-byte command (CMD) + 1-byte data length (LEN) + variable-byte data (DATA), where CMD = 0x8001 represents a vital signs data report, and the DATA field includes node ID (1 byte), body temperature (4 bytes, 2 bytes for integer and 2 bytes for decimal), electrocardiogram (2 bytes), and blood oxygen (1 byte). This format can effectively improve data integrity and transmission efficiency.

[0056] In this embodiment, the workflow of the power management unit is as follows:

[0057] Within a single acquisition cycle, after completing the acquisition of vital signs, calculation of vital signs parameters, and transmission to the Internet of Things, a sleep signal is sent to each module to reduce system power consumption. When entering the next acquisition cycle or after external power-on, a wake-up signal is sent to each module.

[0058] In this embodiment, the communication module is a CC2530 chip U3, which is a 2.4GHz ZigBee radio frequency transceiver running the Z-Stack protocol stack. It is compatible with the 802.15.4 standard protocol, can be seamlessly connected to the medical IoT system, supports star networking, and has a communication distance of 10-30m in indoor environments, meeting the usage needs of scenarios such as home and hospital ward.

[0059] In terms of power consumption control, the CC2530 chip has multiple operating modes. The current in sleep mode is only 0.9μA, the current in receive mode is 19.7mA, and the current in transmit mode is 17.4mA (0dBm output). It automatically enters sleep mode when there is no data transmission, and only the 32KHz crystal oscillator works. It can resume operation within 1μs after being woken up by an external interrupt, effectively reducing power consumption.

[0060] In terms of hardware design, the communication module uses a 4mm×10mm patch antenna to reduce space consumption. The patch antenna impedance matching circuit achieves 50Ω matching through a π-type network to ensure signal transmission stability. The chip integrates a 32MHz crystal oscillator and a 32KHz crystal oscillator, used for the system clock and sleep timer respectively, ensuring accurate and stable clocking.

[0061] like Figure 5 As shown, the power management module includes a battery unit 11, a button control unit 12, and an output unit 13; the output terminal of the battery unit is connected to the input terminal of the button control unit, the output terminal of the button control unit is connected to the input terminal of the output unit, and the output terminal of the output unit is connected to the power supply terminal of each module.

[0062] In this embodiment, the specific circuit of the battery cell is as follows:

[0063] The first port (1) of the battery (BAT) is connected to one end of the second capacitor C2, one end of the sixth capacitor C6, one end of the first switch S1, and the voltage input terminal 1 (Vin) of U2 respectively; the second port (2) of the battery (BAT) is grounded; the other end of the second capacitor C2 and the other end of the sixth capacitor C6 are connected in parallel and then grounded.

[0064] The second capacitor C2 can be a 1μF ceramic capacitor to filter out high-frequency noise; the sixth capacitor C6 can be a 2.2μF tantalum capacitor to filter out low-frequency noise; thus ensuring stable power output and avoiding interference from voltage fluctuations in the battery cell to the operation of each module.

[0065] In this embodiment, the button control unit includes a DC voltage regulator U2 (model LP3985-2.5 can be used), and the specific circuit is as follows:

[0066] The ground terminal 2 (GND) of U2 is grounded; the enable terminal 3 (EN) of U2 is connected to one end of the fourth resistor R4, one end of the third resistor R3, and the negative terminal of the first diode D1; the other end of the fourth resistor R4 is grounded; the other end of the third resistor R3 is connected to the key signal input terminal (P_EN); the positive terminal of the first diode D1 is connected to one end of the first resistor R1 and one end of the second resistor R2; the other end of the second resistor R2 is grounded; the other end of the first resistor R1 is connected to the other end of the first switch S1.

[0067] In this embodiment, the working principle of the button control unit is as follows:

[0068] When a button signal is received for the first time, the battery voltage is divided by R1, R2, and R4 to make the enable terminal 3 (EN) of U2 > 1.4V, and the output terminal 5 (Vout) of U2 outputs 2.5V. After U2 is powered on, the button signal input terminal (P_EN) is set to a high level and is kept enabled by the voltage divider of R3 / R4. When a button signal is received for the second time, the button signal input terminal (P_EN) is set to a low level, and U2 is turned off, thus realizing flexible power supply control.

[0069] In this embodiment, the DC voltage regulator U2 has an input voltage range of 2.5V-6V, can be powered by two AA batteries, outputs a stable voltage of 2.5V, and has an output current of 150mA, which can meet the power supply requirements of each module. Its static current is only 1μA, and its own power consumption is extremely low.

[0070] In this embodiment, the specific circuit of the output unit is as follows:

[0071] The output terminal 5 (Vout) of U2 is connected to one end of the third capacitor C3, one end of the fourth capacitor C4, and the power output terminal (VCC); the feedback terminal 4 (RSN) of U2 is connected to one end of the fifth capacitor C5; the other end of the fifth capacitor C5, the other end of the third capacitor C3, and the other end of the fourth capacitor C4 are connected in parallel and then grounded.

[0072] Among them, the third capacitor C3 and the fifth capacitor C5 can be 1μF ceramic capacitors to filter out high-frequency noise; the fourth capacitor C4 can be a 2.2μF tantalum capacitor to filter out low-frequency noise; thus ensuring stable power output and avoiding interference from voltage fluctuations in the battery cell to the operation of each module.

[0073] In this embodiment, both resistors and capacitors are packaged in 0402 housings with a precision of 1%; all components are miniaturized to further reduce node size. The communication module uses a PCB patch antenna with an impedance of 50Ω, eliminating the need for an external antenna and simplifying the structure.

[0074] In this embodiment, the workflow of this node is divided into four stages, as follows:

[0075] Power-on initialization: The user presses a button to trigger the power management module, U2 outputs 2.5V voltage, U1 and U3 begin initialization, U3 starts the Z-Stack protocol stack and initiates a network access request. After successfully connecting to the medical IoT coordinator, the initialization process is completed and the device enters the data collection state.

[0076] Parameter acquisition: After successful network access, the U1 controls each acquisition unit to work in sequence every 5 minutes; first, it controls the body temperature acquisition unit to complete RC charging and discharging and time measurement, and calculates the body temperature data; then it receives the digital ECG signal output by the BMD101 chip, identifies the R wave and calculates the heart rate; finally, it controls the blood oxygen acquisition unit to acquire the pulse wave signal and calculate the blood oxygen saturation.

[0077] Data transmission: U1 encapsulates the processed body temperature, ECG, and blood oxygen data according to a custom data frame format and sends it to U3 via the UART interface. U3 then transmits the data to the medical IoT coordinator via the 802.15.4 protocol.

[0078] Low-power sleep mode: After data transmission is completed, U3 enters sleep mode, U1 shuts down each acquisition unit of the data acquisition module, and enters RAM retention mode to wait for the next acquisition cycle or external interrupt to wake it up. This cycle is repeated to maximize battery life.

[0079] In this embodiment, a vital sign parameter acquisition system for medical Internet of Things was also calibrated and tested:

[0080] Body temperature calibration was performed in a constant temperature chamber with an accuracy of ±0.01℃. The vital signs acquisition system was placed in the range of 34℃-42℃, and the thermistor R was recorded every 0.5℃. X The resistance value was obtained by fitting a cubic polynomial to obtain the temperature-resistance function, ensuring that the body temperature measurement accuracy reaches ±0.03℃.

[0081] The ECG test was connected to a standard ECG signal generator, which outputs MIT-BIH database signals. The test results showed that the node's accuracy in recognizing the R wave was ≥99%, and the heart rate calculation error was only ±1 bpm, which meets the accuracy requirements of ECG monitoring.

[0082] The blood oxygenation test uses a blood oxygenation simulator to output different blood oxygen values ​​within the range of 70%-100%. The test results show that the node measurement accuracy is ±2% and the response time is <5s, which can quickly and accurately reflect changes in blood oxygen saturation.

[0083] The power consumption test used a power analyzer with an accuracy of ±1μA to measure the current of the node in acquisition, transmission and sleep modes. The calculation showed that when powered by two AA batteries (2000mAh), the node's battery life is ≥30 days, which far exceeds that of existing similar products.

[0084] The data transmission reliability test was conducted in an indoor environment. The communication distance between the node and the coordinator was set to 20m. 10,000 sets of data were transmitted continuously. The data transmission success rate was ≥99.9%, indicating that the wireless communication performance of the node is stable and reliable.

[0085] Example 2

[0086] Based on the vital sign parameter acquisition system for medical IoT in Embodiment 1, this invention also proposes a device for medical IoT. For example... Figure 6 As shown, the device includes the vital signs parameter acquisition system described in Embodiment 1, a coordinator, and a host computer; the output end of the vital signs parameter acquisition system is connected to the input end of the coordinator, and the output end of the coordinator is connected to the input end of the host computer.

[0087] In this embodiment, the vital signs parameter acquisition system, as a sensing layer device, is deployed on the user or in the monitoring area. It collects vital signs parameters such as body temperature, electrocardiogram (ECG), and blood oxygen saturation at a set interval. After processing, the collected parameters are sent to the coordinator via the 802.15.4 protocol. The coordinator, as the core of the network layer, is responsible for receiving vital signs parameters from multiple acquisition systems and forwarding the aggregated parameters to the host computer. The host computer, as an application layer device, can be a computer, server, etc., and has data storage, analysis, and display functions. Medical personnel or users can view changes in vital signs parameters in real time through the host computer. When abnormal parameters occur, the host computer can issue an alarm.

[0088] This medical IoT device enables collaborative work between devices through standardized protocols. The low power consumption of the data acquisition nodes ensures long-term stable operation of the system, and the high-precision data acquisition provides a reliable basis for medical diagnosis and health management. It is suitable for various scenarios such as centralized monitoring in hospital wards, community health management, and home-based telemedicine.

[0089] Example 3

[0090] The present invention also proposes a device for monitoring medical IoT, which integrates a vital sign parameter acquisition system for medical IoT described in Embodiment 1, and can be designed as a wristband, chest patch, portable monitor, etc., depending on the application scenario.

[0091] When designed as a wristband, the PCB board and battery of the vital signs data acquisition system are integrated into the wristband body. The NTC thermistor of the body temperature acquisition unit and the photoelectric pair of the blood oxygen acquisition unit are located on the inside of the wristband, fitting snugly against the skin. The electrodes of the ECG acquisition unit can be designed as part of the wristband strap for convenient wear. When designed as a chest patch, a flexible PCB board is used to integrate all modules onto a thin chest patch carrier, which can be attached to the user's chest without affecting daily activities and is suitable for long-term monitoring.

[0092] This medical monitoring device features low power consumption and a miniaturized design. Powered by two AA batteries, it can last for more than 30 days without frequent charging, providing a good user experience. Furthermore, the collected vital sign data can be wirelessly transmitted to mobile phones, computers, and other terminal devices, allowing users to check their health status at any time and enabling medical staff to remotely monitor patients' conditions.

[0093] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A vital sign parameter acquisition system for medical Internet of Things, characterized in that, It includes a data acquisition module, a data processing module, a communication module, and a power management module; The output of the data acquisition module is connected to the input of the data processing module, the output of the data processing module is connected to the input of the communication module, and the output of the communication module is connected to the Internet of Things (IoT) wirelessly / wiredly. The output of the power management module is connected to the power supply terminals of the data acquisition module, the data processing module, and the communication module, respectively.

2. The vital sign parameter acquisition system for medical IoT as described in claim 1, characterized in that, It also includes a storage module for storing the vital signs signals collected by the data acquisition module and the vital signs parameters calculated by the data processing module.

3. The vital sign parameter acquisition system for medical IoT as described in claim 1, characterized in that, The data processing module is located on the first PCB board; the power management module is located on the second PCB board; the ground wire is located on the third PCB board; and the communication module is located on the fourth PCB board.

4. The vital sign parameter acquisition system for medical IoT as described in claim 1, characterized in that, The data acquisition module includes a body temperature acquisition unit, an electrocardiogram (ECG) acquisition unit, and a blood oxygen acquisition unit; wherein, the body temperature acquisition unit is used to acquire body temperature signals; the ECG acquisition unit is used to acquire ECG signals; and the blood oxygen acquisition unit is used to acquire blood oxygen signals.

5. A vital sign parameter acquisition system for medical IoT as described in claim 4, characterized in that, The specific circuit of the body temperature acquisition unit is as follows: The first output terminal of the data processing module is connected to one end of the thermistor, the second output terminal of the data processing module is connected to one end of the reference resistor, the other end of the thermistor, the other end of the reference resistor, and one end of the first capacitor are connected in parallel and then connected to the signal input terminal of the data processing module, and the other end of the first capacitor is grounded.

6. A vital sign parameter acquisition system for medical IoT as described in claim 4, characterized in that, The ECG acquisition unit uses the BMD101 biosignal processing chip; the blood oxygen acquisition unit uses a dual-wavelength photoelectric pair of red and infrared light.

7. A vital sign parameter acquisition system for medical IoT as described in claim 1, characterized in that, The data processing module includes a control unit, an initialization unit, a feature parameter calculation unit, a data encapsulation unit, and a power consumption management unit; The system includes: a control unit for processing and forwarding various data, and for controlling the charging and discharging of the body temperature acquisition unit; an initialization unit for initializing the control unit, the feature parameter calculation unit, and the power management unit; a feature parameter calculation unit for calculating feature parameters based on the acquired vital signs signals; a data encapsulation unit for encapsulating the vital signs parameters according to a preset data frame format and sending them to the communication module; and a power management unit for putting each unit and module into sleep mode and waking it up.

8. A vital sign parameter acquisition system for medical IoT as described in claim 1, characterized in that, The power management module includes a battery unit, a button control unit, and an output unit; the output terminal of the battery unit is connected to the input terminal of the button control unit, the output terminal of the button control unit is connected to the input terminal of the output unit, and the output terminal of the output unit is connected to the power supply terminal of each module.

9. A device for medical Internet of Things, characterized in that, The device includes a vital sign parameter acquisition system for medical Internet of Things as described in any one of claims 1-8, a coordinator, and a host computer; the output terminal of the vital sign parameter acquisition system is connected to the input terminal of the coordinator, and the output terminal of the coordinator is connected to the input terminal of the host computer. The vital signs parameter acquisition system, as the sensing layer, is used to collect vital signs parameters; As the core of the network layer, the coordinator is responsible for receiving vital signs parameters sent by multiple vital signs parameter acquisition systems, and then summarizing and forwarding the vital signs parameters to the host computer. The host computer, as an application layer device, is used for data storage, analysis, and display. When abnormal vital signs occur, the host computer can issue an alarm.

10. A monitoring device for medical Internet of Things, characterized in that, The monitoring device integrates a vital sign parameter acquisition system for medical Internet of Things as described in any one of claims 1-8; the monitoring device includes a wristband, a chest patch, and a portable monitor.

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