A high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting

Abstract

This invention provides a high-precision blood glucose concentration detection system supporting wireless / photovoltaic dual-mode energy harvesting, comprising: a chip, a sensor, and a wireless / photovoltaic power supply system; the chip is connected to the wireless / photovoltaic power supply system for receiving the collected ambient energy; the chip includes: a power management module, comprising a wireless / photovoltaic dual-mode energy harvesting module, a bandgap reference voltage source, and a low-dropout linear regulated power supply; a blood glucose concentration detection module, comprising a potentiometer and a current detection module, the current detection module comprising a programmable transimpedance amplifier, an oversampling successive approximation analog-to-digital converter, a digital filter, and a downsampling module; a control module, comprising a serial digital interface, a control logic module, a first-in-first-out module, at least one 12-bit digital-to-analog converter, a temperature sensor, and a system analog-to-digital converter; this invention solves the problem of balancing battery life and accuracy in dynamic blood glucose monitoring devices.

Description

Technical Field

[0001] This invention relates to the fields of integrated circuits and medical electronics, specifically to a high-precision blood glucose concentration detection system that supports wireless photovoltaic dual-mode energy harvesting. Background Technology

[0002] In recent years, with population aging and changes in lifestyle, the number of diabetes patients in my country has continued to grow, exceeding 140 million. Continuous glucose monitoring (CGM) technology, through wearable devices, continuously monitors blood glucose levels, reflecting real-time trends and gradually becoming an important tool for diabetes management. However, most existing CGM systems rely on a single battery, resulting in limited battery life. Frequent battery replacements or recharging not only affect user experience but also limit the system's long-term continuous monitoring capability. Furthermore, some systems sacrifice detection accuracy to reduce power consumption, making it difficult to balance the needs of long-term operation with high-precision measurement.

[0003] Therefore, how to improve the system's energy acquisition capability, extend the operating time under small battery conditions, and achieve high-precision, low-noise acquisition of electrochemical blood glucose signals while ensuring detection accuracy has become an urgent problem to be solved in current dynamic blood glucose monitoring technology. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision blood glucose concentration detection system that supports wireless photovoltaic dual-mode energy harvesting, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting, comprising: a chip, a sensor, and a wireless / photovoltaic power supply system; The chip is connected to the wireless / photovoltaic power supply system and is used to receive the ambient energy collected by it; The chip includes: The power management module includes a wireless / photovoltaic dual-mode energy harvesting module, a bandgap reference voltage source, and a low-dropout linear regulated power supply; The blood glucose concentration detection module includes a potentiometer and a current detection module. The current detection module includes a programmable transimpedance amplifier, an oversampling successive approximation analog-to-digital converter, a digital filter, and a downsampling module. The control module includes a serial digital interface, a control logic module, a first-in-first-out module, at least one 12-bit digital-to-analog converter, a temperature sensor, and a system analog-to-digital converter; The potentiometer is connected to the reference electrode of the sensor and the 12-bit digital-to-analog converter in the control module; the input of the programmable transimpedance amplifier is connected to the working electrode of the sensor, and the output is connected to the oversampled successive approximation analog-to-digital converter; the oversampled successive approximation analog-to-digital converter, the digital filter, and the downsampling module are connected in sequence; the output of the downsampling module is connected to the first-in-first-out module.

[0006] Furthermore, the wireless / photovoltaic dual-mode energy harvesting module is used to harvest radio frequency energy and solar energy from the environment, and to provide energy for the bandgap reference voltage source and the low dropout linear regulated power supply.

[0007] Furthermore, the bandgap reference voltage source and the low-dropout linear regulated power supply are used to provide a stable 1.2V operating voltage for the system.

[0008] Furthermore, the blood glucose concentration detection module performs oversampling through the oversampling successive approximation analog-to-digital converter, and then processes the signal through the digital filter and downsampling module to reduce noise within the signal bandwidth.

[0009] Furthermore, the programmable transimpedance amplifier can be configured with at least three different transimpedance gains to detect current signals in different ranges.

[0010] Furthermore, the control module includes three 12-bit digital-to-analog converters, which are used to set the reference voltages of the first working electrode, the second working electrode, and the potentiometer, respectively.

[0011] Furthermore, the system analog-to-digital converter is used to quantify the voltage of each electrode of the sensor; the first-in-first-out module is used to receive and cache blood glucose concentration data from the downsampling module, temperature data from the temperature sensor, and electrode voltage data from the system analog-to-digital converter.

[0012] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: by introducing a wireless / photovoltaic dual-mode energy harvesting mechanism, it can simultaneously and efficiently harvest radio frequency energy and solar energy from the environment, providing continuous energy support for the system and significantly extending the system's usage time and continuous monitoring capability under small battery power conditions; at the same time, the system adopts a low-power power management and high-precision blood glucose signal acquisition design, achieving stable and accurate detection of weak electrochemical blood glucose signals while ensuring overall power consumption is limited, and possessing certain sensor adaptability and improved detection range, thereby enhancing the system's practicality and reliability. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a system principle block diagram of the present invention. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figure 1 The present invention provides a technical solution: a high-precision blood glucose concentration detection system that supports wireless photovoltaic dual-mode energy harvesting, comprising: a chip, a sensor and a wireless / photovoltaic power supply system; The chip connects to a wireless / photovoltaic power supply system to receive the ambient energy it collects; The chip includes: The power management module includes a wireless / photovoltaic dual-mode energy harvesting module, a bandgap reference voltage source, and a low-dropout linear regulated power supply; The blood glucose concentration detection module includes a potentiometer and a current detection module. The current detection module includes a programmable transimpedance amplifier, an oversampling successive approximation analog-to-digital converter, a digital filter, and a downsampling module. The control module includes a serial digital interface, a control logic module, a first-in-first-out module, at least one 12-bit digital-to-analog converter, a temperature sensor, and a system analog-to-digital converter; The potentiometer is connected to the reference electrode of the sensor and the 12-bit digital-to-analog converter in the control module; the input of the programmable transimpedance amplifier is connected to the working electrode of the sensor, and the output is connected to the oversampled successive approximation analog-to-digital converter; the oversampled successive approximation analog-to-digital converter, the digital filter, and the downsampling module are connected in sequence; the output of the downsampling module is connected to the first-in-first-out module.

[0016] The wireless / photovoltaic dual-mode energy harvesting module is used to collect radio frequency energy and solar energy from the environment, rectify, convert and manage the collected energy, and provide power to the bandgap reference voltage source and low dropout linear regulated power supply. During system operation, the wireless / photovoltaic dual-mode energy harvesting module can adaptively utilize one or more energy sources, either radio frequency energy or photovoltaic energy, according to environmental conditions, and work in conjunction with a small-capacity battery. This effectively reduces battery energy consumption and significantly extends the continuous working time and lifespan of the system without significantly increasing the system size.

[0017] The wireless / photovoltaic dual-mode energy harvesting module collects radio frequency energy and solar energy from the environment, and provides at least a portion of the harvested energy to a bandgap reference voltage source and a low-dropout linear regulator to support their normal operation. The bandgap reference voltage source generates a stable reference voltage, and the low-dropout linear regulator regulates the input energy based on the reference voltage, thereby providing a stable 1.2V operating voltage to each functional module of the chip system. This ensures that the system can maintain a reliable and stable operating state even under external energy fluctuations or battery voltage changes.

[0018] The blood glucose concentration detection module performs oversampling through an oversampling successive approximation analog-to-digital converter, and then processes the signal through a digital filter and a downsampling module to reduce noise within the signal bandwidth and achieve high-precision blood glucose concentration detection.

[0019] The programmable transimpedance amplifier can be configured with at least three different transimpedance gains to detect current signals in different ranges.

[0020] The three 12-bit digital-to-analog converters in the control module can change the reference voltages of working electrode 1 (WE1), working electrode 2 (WE2), and potentiometer respectively according to the configuration of the serial digital interface and control logic. Their function is to change the voltage of each electrode (WE1, WE2, RE, and CE) according to the user configuration to adapt to different sensors.

[0021] The system analog-to-digital converter of the control module is used to quantify the voltage of each electrode (WE1, WE2, RE, and CE). The first-in-first-out (FIFO) module is used to receive the data quantized by the blood glucose concentration detection module, the temperature data quantized by the temperature sensor after being converted by the analog-to-digital converter, and the voltage of each electrode converted by the system analog-to-digital converter in real time. Users can read the quantified data sequentially through the FIFO module. Its function is to periodically detect blood glucose concentration, temperature, and electrode working status. The temperature is used to calibrate the blood glucose concentration data.

[0022] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting, characterized in that, include: Chips, sensors, and wireless / photovoltaic power supply systems; The chip is connected to the wireless / photovoltaic power supply system and is used to receive the ambient energy collected by it; The chip includes: The power management module includes a wireless / photovoltaic dual-mode energy harvesting module, a bandgap reference voltage source, and a low-dropout linear regulated power supply; The blood glucose concentration detection module includes a potentiometer and a current detection module. The current detection module includes a programmable transimpedance amplifier, an oversampling successive approximation analog-to-digital converter, a digital filter, and a downsampling module. The control module includes a serial digital interface, a control logic module, a first-in-first-out module, at least one 12-bit digital-to-analog converter, a temperature sensor, and a system analog-to-digital converter; The potentiometer is connected to the reference electrode of the sensor and the 12-bit digital-to-analog converter in the control module; the input of the programmable transimpedance amplifier is connected to the working electrode of the sensor, and the output is connected to the oversampled successive approximation analog-to-digital converter; the oversampled successive approximation analog-to-digital converter, the digital filter, and the downsampling module are connected in sequence; the output of the downsampling module is connected to the first-in-first-out module.

2. The high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting according to claim 1, characterized in that, The wireless / photovoltaic dual-mode energy harvesting module is used to harvest radio frequency energy and solar energy from the environment, and to provide energy for the bandgap reference voltage source and the low dropout linear regulated power supply.

3. A high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting according to claim 1, characterized in that, The bandgap reference voltage source and low dropout linear regulated power supply are used to provide a stable 1.2V operating voltage for the system.

4. A high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting according to claim 1, characterized in that, The blood glucose concentration detection module performs oversampling through the oversampling successive approximation analog-to-digital converter and processes the signal through the digital filter and downsampling module to reduce noise within the signal bandwidth.

5. A high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting according to claim 1, characterized in that, The programmable transimpedance amplifier can be configured with at least three different transimpedance gains to detect current signals in different ranges.

6. A high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting according to claim 1, characterized in that, The control module includes three 12-bit digital-to-analog converters, which are used to set the reference voltages of the first working electrode, the second working electrode, and the potentiometer, respectively.

7. A high-precision blood glucose concentration detection system supporting wireless photovoltaic dual-mode energy harvesting according to claim 1, characterized in that, The system analog-to-digital converter is used to quantify the voltage of each electrode of the sensor; the first-in-first-out module is used to receive and cache blood glucose concentration data from the downsampling module, temperature data from the temperature sensor, and electrode voltage data from the system analog-to-digital converter.

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