Single-coil power supply communication integrated device for implantable chip and method thereof

Abstract

The application provides a single-coil power supply communication integrated device applied to an implantable chip and a method thereof, a power supply part includes a power supply transmitting end outside a body and a corresponding power supply receiving end in the body, energy is transmitted into the body by using a magnetic coupling wireless power supply mode; the power supply receiving end is connected with a voltage stabilizing module, voltage stability is maintained; the voltage stabilizing module is connected with a control core, the control core is connected with a sensor and a storage ID, the control core performs data storage and signal modulation, data feedback is output to the power supply part by acquiring the sensor and the animal identity ID, and changes of the storage ID identity information and the sensor parameters are fed back on the power supply signal. The application solves the problem of interference between communication and power supply signals and reduces the volume of an implant.

Description

Technical Field

[0001] This invention belongs to the field of implantable chip technology, specifically relating to a single-coil power supply and communication integrated device and method for implantable chips. Background Technology

[0002] The basic principle of existing ID transmission technologies is to use RFID resistance modulation to modulate the ID digital signal onto the amplitude of the power supply signal. The modulated signal can be directly identified as either 0 or 1. It has already seen many applications in access control cards, pet monitoring, and other fields, such as CN213814737U, an active RFID tag for access control systems; and CN111062828A, a pet monitoring method, system, chip, and storage medium. A 0-1 digital signal can be generated by the opening and closing of a switch S, thus affecting the voltage amplitude, and the change in voltage amplitude indicates a change in the digital signal. However, these existing technologies cannot transmit analog signals. All current RFID products cannot transmit analog signals of internal physiological parameters; they only transmit digital signals.

[0003] The core technologies of existing implantable chips are basically power supply, sensing, and data communication. Most existing data communication and power supply technologies are based on magnetic field induction for signal transmission. Multiple coils are needed both inside and outside the body for data communication and power supply, respectively. The first link provides energy to the body, the second link transmits stimulation signals internally, and the third link returns feedback based on the stimulation signals. For example, CN112220593A, an implantable device and related method for monitoring heart failure, has three links. It is important to note that the second and third links may not be present in all implantable chips. For instance, implantable chips with sensors often lack the second link, as seen in CN113180602A, a circuit system for a multimodal sensor for acquiring intracranial physiological and biochemical information.

[0004] Existing ID transmission technologies are relatively mature, but these technologies can only transmit digital signals. Analog signals cannot be modulated onto switches, and therefore cannot transmit the analog signals carried by physiological parameters within the body. Currently, all RFID-enabled products cannot transmit analog signals of internal physiological parameters.

[0005] Existing implantable chips typically use multiple links, such as CN112220593A, for implantable devices and related methods for heart failure monitoring. One link is used for power supply, and another for data communication (forward and reverse). Data communication and power supply cannot be completely separated, and there may be a coupling coefficient between different links. For example, two links have 6 coupling coefficients, and three links have 15 coupling coefficients. Interference between signals is inevitable, which will cause deviations in the signals transmitted from inside the body to outside the body, thus affecting the measurement accuracy of the implantable chip. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention, targeting implantable chips, proposes a circuit structure that integrates communication and power supply coils to transmit analog signals carried by sensors externally. This solves the problem of interference between communication and power supply signals and reduces the size of the implant. Furthermore, by modulating the animal's identification ID and physiological parameters onto the power supply signal, both the identification ID and physiological parameters can be reflected in a single signal. The physiological parameters and identification ID information are respectively reflected in the frequency and duty cycle of a square wave.

[0007] The specific technical solution is as follows:

[0008] A single-coil power supply and communication integrated device for implantable chips, including a power supply section, a voltage regulator module, and a control core;

[0009] The power supply section includes an external power transmitter and a corresponding internal power receiver, which transmits energy into the body using magnetic coupling wireless power supply.

[0010] The power receiver is connected to a voltage regulator module to maintain a stable voltage.

[0011] The voltage regulator module is connected to the control core, which is connected to the sensor and the stored ID. The control core performs data storage and signal modulation, and feeds back the output data from the sensor and the animal's ID to the power supply section, reflecting the changes in the stored ID information and sensor parameters in the power supply signal.

[0012] Using the above-described device, the present invention also provides a single-coil power supply and communication integrated method for implantable chips, which modulates the animal's identity ID and physiological parameters together on the power supply signal, reflects the identity ID and physiological parameters on a single signal, and reflects the physiological parameters and identity ID information respectively on the frequency and duty cycle of a square wave.

[0013] Specifically, it includes the following steps:

[0014] S1. Changes in the sensor's sensing parameters will cause a change in the frequency of the sensor's output signal; store the ID to output the animal's identity;

[0015] The control core acquires the frequency of the analog signal carried by the sensor and the animal's identity stored in the ID, then modulates the two pieces of information into a signal, namely feedback data, and then inputs the feedback data into the power supply section.

[0016] The specific modulation method is as follows: After obtaining the sensor output signal, the sensor's measurement signal is used as the base frequency signal, and the Binary ASK modulation method is used with the following formula:

[0017]

[0018] Where A1 > A2, ω is the frequency of the sensor signal, and ω reflects the physiological parameter information; M is the animal's ID information 0 or 1. When M is 0, the signal amplitude is A2, and when M is 1, the signal amplitude is A1. The amplitude of the signal reflects the identity ID information. That is, the modulated signal contains both identity ID information and physiological parameter information. Identity ID information is represented by amplitude, and physiological parameter information is represented by frequency.

[0019] The resistance modulation method of the present invention can also be used for binary amplitude keying (OOK, On-Off Keying), passive phase shift modulation (PPSK), etc.

[0020] S2. Feed the data back to the power supply section. The power supply section feeds the data back to the power supply section. The power supply section represents the feedback data through a square wave signal, so as to use the signal frequency to reflect physiological parameters and the duty cycle to reflect the identity ID.

[0021] The specific method is as follows:

[0022] The feedback data output is connected to the gate of the NMOS transistor. When the feedback voltage value is higher than the threshold, the MOS transistor turns on, and R... mod When connected to the circuit, the load resistance decreases, the output voltage amplitude decreases, and the transmitter voltage amplitude increases; when the feedback voltage value is below the threshold, the MOS is turned off, and R... mod Disconnection causes the load resistance to increase, the output voltage amplitude to increase, and the voltage amplitude at the power supply transmitter to decrease.

[0023] The voltage amplitude will ultimately be reflected in the duty cycle of the square wave signal, so that the signal frequency can reflect physiological parameters and the duty cycle can reflect identity ID.

[0024] S3. After the data processing is completed, the period of each frame of the square wave is the same. By measuring the period T of the square wave signal, the frequency f of the sensor signal can be calculated. By establishing the relationship between the sensor's charge value and the frequency of the output signal, the internal physiological parameters can be obtained. By measuring t1 and t2, the duty cycle of each frame of data can be calculated. A larger value indicates a digital signal of 1, and a smaller value indicates a digital signal of 0. That is, the different duty cycles can be used to determine whether the digital signal is 0 or 1.

[0025] Key technologies of this invention:

[0026] 1. By using MOSFETs and resistor modulation, the power supply and communication coils are combined into one, enabling the transmission of analog signals from inside the body to outside the body.

[0027] 2. By using the duty cycle and period of the square wave to represent the identity ID and physiological information respectively, information that is very important to animals can be transmitted to the outside of the body through a single coil.

[0028] This invention first utilizes the principle of MOSFET and resistor modulation to transmit the analog signal carried by the sensor to the outside through a single link, solving the problem of interference between the two links in existing implantable chips. At the same time, the single link also reduces the size of the implant to a certain extent.

[0029] Based on this, the animal's identity ID and physiological parameters are integrated into the same signal. The duty cycle and frequency of the output square wave represent the animal's identity ID and physiological parameters, respectively. This solves the problem that existing animal implantable chips can only transmit IDs. Furthermore, using the duty cycle to represent the identity ID provides a certain degree of confidentiality compared to the existing technology that directly uses 0-1 signals to represent the ID. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the device of the present invention;

[0031] Figure 2 This is a schematic diagram of the implanted chip structure in an embodiment;

[0032] Figure 3 This is a schematic diagram of the signal modulation principle in the embodiment;

[0033] Figure 4 This is a schematic diagram of the feedback principle in an embodiment;

[0034] Figure 5 This is a waveform variation diagram of an embodiment. Detailed Implementation

[0035] The specific technical solution of the present invention will be described in conjunction with the accompanying drawings.

[0036] A single-coil power supply and communication integrated device for implantable chips, the basic structure diagram of which is shown below. Figure 1The system includes a power supply unit, comprising an external power transmitter and a corresponding internal power receiver. Energy is transferred to the internal body via magnetic coupling wireless power supply. An internal voltage regulator module ensures stable voltage and normal chip operation even when external conditions such as coil distance or load change. An internal control core connects to sensors and stored ID digital signals. It receives data from the sensors and animal identification ID and feeds it back to the power supply unit, reflecting changes in the stored ID information and sensor parameters (physiological parameters) onto the power supply signal.

[0037] A method for integrating single-coil power supply and communication in implantable chips:

[0038] S1、 Figure 2 The core of the implanted chip involves sensors whose sensing parameters change, causing a shift in the frequency of the sensor's output signal. The stored animal identification digital signal (ID) is read via an I2C interface, saving power consumption. The control core of the implanted chip primarily handles data storage and signal modulation. Feedback data is the signal modulated and output by the control core. After receiving power from the outside, the system begins operation. The control core acquires the frequency of the analog signal carried by the sensor and the stored animal identification ID. It then modulates these two pieces of information into a single signal and feeds the data back to the power supply.

[0039] The specific modulation method is as follows: After obtaining the sensor output signal, the sensor's measurement signal is used as the base frequency signal, and the Binary ASK modulation method is used with the following formula:

[0040]

[0041] Where A1 > A2, ω is the frequency of the sensor signal, and ω reflects physiological parameter information; M is the animal's ID information, 0 or 1. When M is 0, the signal amplitude is A2; when M is 1, the signal amplitude is A1. The signal amplitude reflects the identity ID information, that is, the modulated signal contains both identity ID information (represented by amplitude) and physiological parameter information (represented by frequency). Figure 3 As shown:

[0042] S2. Feed the data back to the power supply section. See the schematic diagram below. Figure 4 As shown.

[0043] The basic principle is to connect the feedback data output to the gate of an NMOS transistor. When the feedback voltage value is higher than a certain value, the MOS transistor turns on, and R... mod When connected to the circuit, the load resistance decreases, the output voltage amplitude decreases, and the transmitter voltage amplitude increases; when the feedback voltage value falls below a certain value, the MOS is turned off, and R...mod Disconnection causes the load resistance to increase, resulting in a larger output voltage amplitude and a smaller transmitting voltage amplitude. However, due to the presence of the voltage regulator module, the internal sensor of the chip remains unaffected by changes in output voltage amplitude and continues to operate normally.

[0044] For specific waveform changes, see Figure 5 From top to bottom are the feedback voltages. This embodiment is a simplified illustration, showing only four cycles: the voltage across the load resistor at the receiving end, the voltage across the coil at the transmitting end, and the demodulated voltage. After comparison, a square wave signal can be obtained.

[0045] When the ID signal is 1, the data output voltage amplitude is high; when the ID signal is 0, the data output voltage amplitude is low. For the same turn-on voltage ( Figure 5 (The black straight line in the middle) The voltage amplitude will ultimately be reflected in the duty cycle of the square wave signal, that is, the signal frequency is used to reflect physiological parameters and the duty cycle is used to reflect identity ID.

[0046] S3. After data processing is complete, each frame of the square wave has the same period. By measuring the period T of the square wave signal, the frequency f of the sensor signal can be calculated. By establishing the relationship between the sensor's electrical charge value and the frequency of the output signal, internal physiological parameters can be obtained. Measuring t1 and t2 allows the calculation of the duty cycle of each frame of data. A larger duty cycle indicates a digital signal of 1, and a smaller duty cycle indicates a digital signal of 0. In other words, the different duty cycles determine whether a number is 0 or 1. In summary, a set of data containing specific physiological parameters and identity ID information can be obtained externally, represented by different parameters of the square wave. The entire system has only one link, eliminating information interference.

Claims

1. A single-coil power supply and communication integrated method for implantable chips, utilizing a single-coil power supply and communication integrated device for implantable chips, the device including a power supply section, a voltage regulator module, and a control core; The power supply section includes an external power transmitter and a corresponding internal power receiver, which transmits energy into the body using magnetic coupling wireless power supply. The power receiver is connected to a voltage regulator module to maintain a stable voltage. The voltage regulator module is connected to the control core, which is connected to the sensor and the stored ID. The control core performs data storage and signal modulation, and feeds back the output data from the sensor and the animal identification ID to the power supply section, reflecting the changes in the stored ID information and sensor parameters in the power supply signal. The method is characterized by modulating the animal's identification ID and physiological parameters onto a power supply signal, reflecting both the identification ID and physiological parameters on a single signal, and reflecting the physiological parameters and identification ID information respectively on the frequency and duty cycle of a square wave; specifically, it includes the following steps: S1. Changes in the sensor's sensing parameters will cause a change in the frequency of the sensor's output signal; store the ID to output the animal's identity; The control core acquires the frequency of the analog signal carried by the sensor and the animal's identity stored in the ID, then modulates the two pieces of information into a signal, namely feedback data, and then inputs the feedback data into the power supply section. S2. Feed the data back to the power supply section. The power supply section will represent the feedback data as a square wave signal, so that the physiological parameters can be reflected by the signal frequency and the identity ID can be reflected by the duty cycle. S3. After the data processing is completed, the period of each frame of the square wave is the same. Measure the period T of the square wave signal, calculate the frequency f of the sensor signal, and obtain the internal physiological parameters by establishing the relationship between the sensor's charge value and the frequency of the output signal. Measure t1 and t2 to calculate the duty cycle of each frame of data. A larger value indicates a digital signal of 1, and a smaller value indicates a digital signal of 0. That is, the different duty cycles are used to determine whether the digital signal is 0 or 1.

2. The single-coil power supply and communication integrated method for implantable chips according to claim 1, characterized in that, The modulation method in S1 is as follows: after obtaining the sensor output signal, the sensor's measurement signal is used as the base frequency signal, and the Binary ASK modulation method is used with the following formula: ， in , The frequency of the sensor signal, It reflects physiological parameter information; The animal's ID information is 0 or 1, when When it is 0, the signal amplitude is ,when When the value is 1, the signal amplitude is The amplitude of the signal reflects the identity ID information. That is, the modulated signal contains both identity ID information and physiological parameter information. The identity ID information is represented by the amplitude, and the physiological parameter information is represented by the frequency.

3. The single-coil power supply and communication integrated method for implantable chips according to claim 1, characterized in that, The modulation method in S1 is binary amplitude shift keying.

4. The single-coil power supply and communication integrated method for implantable chips according to claim 1, characterized in that, The modulation method in S1 is a passive phase-shift modulation method.

5. The single-coil power supply and communication integrated method for implantable chips according to claim 1, characterized in that, In S2, the specific method is as follows: the power supply section outputs the feedback data to the gate of the NMOS transistor; when the feedback voltage value is higher than the threshold, the MOS transistor is turned on. When connected to the circuit, the load resistance decreases, the output voltage amplitude decreases, and the transmitter voltage amplitude increases; when the feedback voltage value is below the threshold, the MOSFET is turned off. Disconnection causes the load resistance to increase, resulting in a larger output voltage amplitude and a smaller voltage amplitude at the power supply transmitter.

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