CN114915040A - Single-coil power supply and communication integrated device applied to implanted chip and method thereof - Google Patents

Single-coil power supply and communication integrated device applied to implanted chip and method thereof Download PDF

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CN114915040A
CN114915040A CN202210506838.2A CN202210506838A CN114915040A CN 114915040 A CN114915040 A CN 114915040A CN 202210506838 A CN202210506838 A CN 202210506838A CN 114915040 A CN114915040 A CN 114915040A
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power supply
signal
sensor
identity
frequency
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马骏
杨涛
杜天昊
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Beijing Xinlianxin Technology Development Co ltd
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Beijing Xinlianxin Technology Development Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
    • H04B13/005—Transmission systems in which the medium consists of the human body
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

The invention provides a single coil power supply and communication integrated device applied to an implanted chip and a method thereof.A power supply part comprises a power supply transmitting end outside a body and a power supply receiving end inside the corresponding body, and energy is transferred to the inside of the body by using a magnetic coupling wireless power supply mode; the power supply receiving end is connected with the voltage stabilizing module to keep the voltage stable; the voltage stabilizing module is connected with the control core, the control core is connected with the sensor and the storage ID, the control core performs data storage and signal modulation, data are output and fed back to the power supply part through the acquisition of the sensor and the animal identity ID, and the storage ID identity information and parameters of the sensor are fed back to the change of the power supply signal. The invention solves the problem of interference between communication and power supply signals and reduces the volume of the implant.

Description

Single-coil power supply and communication integrated device applied to implanted chip and method thereof
Technical Field
The invention belongs to the technical field of implantable chips, and particularly relates to a single-coil power supply and communication integrated device and a single-coil power supply and communication integrated method applied to an implantable chip.
Background
The basic principle of the existing identity ID transmission technology is to modulate an ID digital signal on the amplitude of a power supply signal by utilizing an RFID resistance modulation principle, and the modulated signal can also directly see whether the signal is 0 or 1. The method has many applications in the fields of access control cards, pet supervision and the like, such as CN213814737U, an active RFID label for an access control system; CN111062828A, a pet supervision method, system, chip and storage medium. The 0-1 digital signal can be the switch S is closed and opened, so that the voltage amplitude is influenced, and the change of the digital signal can be seen from the change of the voltage amplitude. However, these prior art technologies cannot transmit analog signals, and all existing RFID-enabled products cannot transmit analog signals of internal physiological parameters, but only digital signals.
The core technology of the existing implanted chip is basically energy supply, sensing and data communication. The existing data communication and energy supply technologies are mostly based on magnetic field induction for signal transmission, a plurality of coils are needed in vivo and in vitro for data communication and energy supply respectively, a first link provides energy for the inside of the body, a second link transmits stimulation signals to the inside, and a third link returns feedback according to the stimulation signals. Such as CN112220593A, there are three links in an implantable device and related method for heart failure monitoring. It should be noted that, within different implantable chips, the second link and the third link do not necessarily exist, and if the implantable chip of the sensor exists, the second link often does not exist, CN113180602A, and the circuit system of the multi-modal sensor for acquiring intracranial physiological and biochemical information.
The existing identity ID transmission technology is mature, but the technology can only transmit digital signals, and analog signals cannot be modulated on a switch and cannot transmit analog signals carried by physiological parameters in a body. All existing RFID-functional products cannot transmit analog signals of internal physiological parameters.
Existing implantable chips typically use multiple links, such as CN112220593A, implantable devices and related methods for heart failure monitoring. One for energy supply and the other for data communication (forward direction and reverse direction), the data communication and the energy supply cannot be completely separated, one coupling coefficient may exist between different links, for example, 6 coupling coefficients exist for two links, 15 coupling coefficients exist for three links, and interference can certainly exist between signals, which can cause deviation of signals transmitted from the inside to the outside of the body, and further influences the measurement accuracy of the implanted chip.
Disclosure of Invention
In order to solve the technical problems, the invention provides a circuit structure integrating communication and power supply coils, which can transmit analog signals carried by a sensor to the outside of a body, aiming at an implanted chip, so that the problem of interference between communication and power supply signals is solved, and the volume of an implant is reduced. And on the basis, the identity ID and the physiological parameters of the animal are modulated on the power supply signal together, the identity ID and the physiological parameters can be reflected on one signal, and the physiological parameters and the identity ID information are respectively reflected on the frequency and the duty ratio of the square wave.
The specific technical scheme is as follows:
the single-coil power supply and communication integrated device applied to the implanted chip comprises a power supply part, a voltage stabilizing module and a control core;
the power supply part comprises a power supply transmitting end outside the body and a power supply receiving end inside the corresponding body, and energy is transmitted into the body in a magnetic coupling wireless power supply mode;
the power supply receiving end is connected with the voltage stabilizing module to keep the voltage stable;
the voltage stabilizing module is connected with the control core, the control core is connected with the sensor and the storage ID, the control core performs data storage and signal modulation, data are output and fed back to the power supply part through the acquisition of the sensor and the animal identity ID, and the storage ID identity information and parameters of the sensor are fed back to the change of the power supply signal.
By applying the device, the invention also provides a single-coil power supply and communication integrated method applied to the implanted chip, the identity ID and the physiological parameters of the animal are modulated on the power supply signal together, the identity ID and the physiological parameters are reflected on one signal, and the physiological parameters and the identity ID information are respectively reflected on the frequency and the duty ratio of the square wave.
Specifically, the method comprises the following steps of,
s1, changing the sensing parameter of the sensor causes the frequency of the output signal of the sensor to change; storing the ID and outputting the identity of the animal;
the control core acquires the frequency of an analog signal carried by the sensor and the identity of an animal storing the ID, then modulates the two kinds of information into a signal, namely feedback data, and then inputs the feedback data into the power supply part;
the specific modulation method is as follows, after obtaining the signal output by the sensor, the measurement signal of the sensor is taken as a fundamental frequency signal, and the following formula is used by using the modulation method of Binary ASK:
Figure BDA0003633193380000021
wherein A is 1 ＞A 2 Omega is the frequency of the sensor signal, and omega reflects physiological parameter information; m is ID information 0 or 1 of the animal, and when M is 0, the signal amplitude is A 2 When M is 1, the signal amplitude is A 1 The amplitude of the signal reflects the identity ID information, namely the modulated signal contains both the identity ID information and the physiological parameter information, the identity ID information is represented by the amplitude, and the physiological parameter information is represented by the frequency.
The resistance Modulation method of the present invention may be binary amplitude Keying (OOK), Passive Phase Shift Modulation (PPSK), or the like.
S2, feeding back data to the power supply part, feeding back the data to the power supply part, and expressing the feedback data by the power supply part through a square wave signal to realize that the signal frequency is used for reflecting physiological parameters and the duty ratio is used for reflecting identity ID;
the specific method comprises the following steps:
the feedback data output is connected to the grid electrode of the NMOS tube, when the feedback voltage value is higher than the threshold value, the MOS is conducted, and R is mod The voltage is connected into a circuit, so that the load resistance is reduced, the output voltage amplitude is reduced, and the emission end voltage amplitude is increased; when the feedback voltage value is lower than the threshold value, the MOS is cut off, and R mod The load resistance is increased, the output voltage amplitude is increased, and the power is suppliedA source emitter voltage amplitude is reduced;
the voltage amplitude is finally reflected on the duty ratio of the square wave signal, so that the signal frequency is used for reflecting the physiological parameter, and the duty ratio is used for reflecting the identity ID;
s3, after the data processing is finished, each frame period of the square wave is the same, the period T of the square wave signal is measured, the frequency f of the sensor signal can be calculated, and the internal physiological parameters can be obtained through the relationship established between the electric quantity value of the sensor and the frequency of the output signal; by measuring t1 and t2, the duty ratio of each frame of data can be calculated, wherein the larger is the digital signal 1, and the smaller is the digital signal 0, namely the digital signal is judged to be 0 or 1 through the difference of the duty ratios.
The key technology of the invention is as follows:
1. and the power supply and communication coil is integrated by using an MOS (metal oxide semiconductor) tube and resistance modulation, so that the analog signal is transmitted from the inside to the outside of the body.
2. The duty ratio and the period of the square wave are used for respectively representing the identity ID and the physiological information, and the information which is very important for the animal is transmitted to the outside of the body through the single coil.
The invention firstly utilizes the MOS tube and the resistance modulation principle to transmit the analog signal carried on the sensor to the outside of the body through one link, thereby solving the problem of interference of two links of the existing implanted chip, and simultaneously reducing the volume of the implant to a certain extent by one link.
On the basis, the identity ID and the physiological parameter of the animal are fused on the same signal, the duty ratio and the frequency of the output square wave are used for respectively representing the identity ID and the physiological parameter of the animal, the problem that the existing implanted chip of the animal can only transmit the ID is solved, and certain confidentiality is achieved when the duty ratio is used for representing the identity ID compared with the situation that the ID is directly represented by a signal of 0-1 in the prior art.
Drawings
FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;
FIG. 2 is a schematic view of an implanted chip according to an embodiment;
FIG. 3 is a schematic diagram of the signal modulation principle of the embodiment;
FIG. 4 is a schematic diagram of the feedback principle of the embodiment;
fig. 5 is a waveform change diagram of the embodiment.
Detailed Description
The specific technical scheme of the invention is explained by combining the attached drawings.
A single-coil power supply and communication integrated device applied to an implanted chip is shown in a basic structural diagram in figure 1 and comprises a power supply part, wherein the power supply part comprises a power supply transmitting end outside a body and a power supply receiving end corresponding to the inside of the body, energy is transferred to the inside of the body in a magnetic coupling wireless power supply mode, a voltage stabilizing module is further arranged inside the body, when external conditions such as the distance of a coil, load and the like change, voltage can be kept stable, and the chip can work normally. The control core is also arranged in the power supply part, is connected with the sensor and stores the digital signal of the ID, and feeds back the stored ID information and the sensor parameter, namely the physiological parameter, to the change of the power supply signal by acquiring the output data of the sensor and the animal ID and feeding back the output data to the power supply part.
The method applied to the integration of power supply and communication of the single coil of the implanted chip comprises the following steps:
s1, fig. 2 shows a core part of the implant chip, wherein the change of the sensing parameter of the sensor will cause the frequency of the output signal of the sensor to change. The animal identification digital signal of the storage ID is read in through an I2C interface, so that the power consumption can be saved. The control core of the implanted chip mainly stores data and modulates signals. The feedback data is a signal output by modulation of the control core. After the energy coming from the outside is obtained, the system starts to operate, the control will obtain the frequency of the analog signal carried on the sensor and the identity of the animal storing the ID, then the control core will modulate the two kinds of information into one signal, and then feed the data back to the power supply part.
The specific modulation method is as follows, after obtaining the signal output by the sensor, the measurement signal of the sensor is taken as a fundamental frequency signal, and the following formula is used by using the modulation method of Binary ASK:
Figure BDA0003633193380000041
wherein A is 1 ＞A 2 Omega is the frequency of the sensor signal, and omega reflects physiological parameter information; m is ID information 0 or 1 of the animal, and when M is 0, the signal amplitude is A 2 When M is 1, the signal amplitude is A 1 The amplitude of the signal reflects the ID information, i.e. the modulated signal contains both ID information (expressed by amplitude) and physiological parameter information (expressed by frequency). As shown in fig. 3:
and S2, feeding back data to the power supply part, wherein a specific schematic diagram is shown in FIG. 4.
The basic principle is that feedback data output is connected to a grid electrode of an NMOS tube, when a feedback voltage value is higher than a certain value, an MOS is conducted, and R is mod The voltage is connected into a circuit, so that the load resistance is reduced, the output voltage amplitude is reduced, and the emission end voltage amplitude is increased; when the feedback voltage value is lower than a certain value, the MOS is cut off, and R is mod And the load resistance is increased, the output voltage amplitude is increased, and the emission terminal voltage amplitude is reduced. Due to the existence of the voltage stabilizing module, when the output voltage amplitude changes, the sensor in the chip can work normally without being influenced by the voltage amplitude change.
The specific waveform change is shown in fig. 5, and the feedback voltage is respectively from top to bottom, and the embodiment is a simple schematic diagram, and only four periods are drawn, and the voltage at two ends of the load resistor at the receiving end, the voltage at two ends of the coil at the transmitting end, and the demodulated voltage are compared subsequently to obtain a square wave signal.
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 (black straight line in fig. 5), the voltage amplitude will be finally reflected on the duty ratio of the square wave signal, that is, the signal frequency is used to reflect the physiological parameter, and the duty ratio is used to reflect the identity ID.
S3, after the data processing is finished, each frame period of the square wave is the same, the period T of the square wave signal is measured, the frequency f of the sensor signal can be calculated, and the internal physiological parameters can be obtained through the relationship established between the electric quantity value of the sensor and the frequency of the output signal; by measuring t1 and t2, the duty ratio of each frame of data can be calculated, wherein the larger is the digital signal 1, and the smaller is the digital signal 0, namely the digital signal is judged to be 0 or 1 through the difference of the duty ratios. In summary, a set of data including specific physiological parameters and ID information can be obtained in vitro and expressed by different parameters of square waves; the whole system has only one link, and no information interference exists.

Claims (7)

1. The single-coil power supply and communication integrated device applied to the implanted chip is characterized by comprising a power supply part, a voltage stabilizing module and a control core;
the power supply part comprises a power supply transmitting end outside the body and a power supply receiving end inside the corresponding body, and energy is transmitted into the body in a magnetic coupling wireless power supply mode;
the power supply receiving end is connected with the voltage stabilizing module to keep the voltage stable;
the voltage stabilizing module is connected with the control core, the control core is connected with the sensor and the storage ID, the control core performs data storage and signal modulation, data are output and fed back to the power supply part through the acquisition of the sensor and the animal identity ID, and the storage ID identity information and parameters of the sensor are fed back to the change of the power supply signal.
2. The single-coil power supply and communication integrated method applied to the implanted chip is characterized in that the device of claim 1 is used for modulating the identity ID and the physiological parameters of animals on a power supply signal together, reflecting the identity ID and the physiological parameters on one signal, and reflecting the physiological parameters and the identity ID information on the frequency and the duty ratio of square waves respectively.
3. The integrated single-coil power supply and communication method applied to the implantable chip according to claim 2, specifically comprising the following steps,
s1, changing the sensing parameter of the sensor causes the frequency of the output signal of the sensor to change; storing the ID and outputting the identity of the animal;
the control core acquires the frequency of an analog signal carried by the sensor and the identity of an animal storing the ID, then modulates the two kinds of information into a signal, namely feedback data, and then inputs the feedback data into the power supply part;
s2, feeding back data to the power supply part, wherein the power supply part represents the feedback data through a square wave signal, so that the signal frequency is used for reflecting physiological parameters, and the duty ratio is used for reflecting the ID;
s3, after the data processing is finished, each frame period of the square wave is the same, the period T of the square wave signal is measured, the frequency f of the sensor signal is calculated, and the internal physiological parameters can be obtained through the relationship established by the electric quantity value of the sensor and the frequency of the output signal; by measuring t1 and t2, the duty ratio of each frame of data can be calculated, wherein the larger is the digital signal 1, and the smaller is the digital signal 0, namely the digital signal is judged to be 0 or 1 through the difference of the duty ratios.
4. The integrated single-coil power supply and communication method applied to the implantable chip according to claim 3, wherein the modulation method in S1 is to use the measurement signal of the sensor as a fundamental frequency signal after obtaining the signal output by the sensor, and use the following formula by using the modulation method of Binary ASK:
Figure FDA0003633193370000011
wherein A is 1 ＞A 2 Omega is the frequency of the sensor signal, and omega reflects physiological parameter information; m is ID information 0 or 1 of the animal, and when M is 0, the signal amplitude is A 2 When M is 1, the signal amplitude is A 1 The amplitude of the signal reflects the identity ID information, namely the modulated signal contains the 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.
5. The integrated single-coil power supply and communication method applied to the implantable chip according to claim 3, wherein the modulation method in S1 is a binary amplitude keying method.
6. The integrated single-coil power supply and communication method applied to the implantable chip according to claim 3, wherein the modulation method in S1 is a passive phase shift modulation method.
7. The integrated single-coil power supply and communication method applied to the implantable chip according to claim 3, wherein the specific method in S2 is that the power supply part outputs feedback data to the gate of the NMOS transistor, and when the feedback voltage value is higher than a threshold value, the MOS is turned on, and R is turned on mod The voltage is connected into a circuit, so that the load resistance is reduced, the output voltage amplitude is reduced, and the emission end voltage amplitude is increased; when the feedback voltage value is lower than the threshold value, the MOS is cut off, and R mod And the load resistance is increased due to disconnection, the output voltage amplitude is increased, and the voltage amplitude of the power source emission end is reduced.
CN202210506838.2A 2022-05-09 2022-05-09 Single-coil power supply and communication integrated device applied to implanted chip and method thereof Pending CN114915040A (en)

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