Data transmission device and method

Abstract

The invention discloses a data transmission device and method, and the device comprises a piezoelectric transduction module which converts a part of received ultrasonic signals into a first AC electric signal, and reflects the other part of the received ultrasonic signals; the alternating current-direct current conversion module is connected with the piezoelectric transduction module; the data acquisition module is connected with the alternating current-direct current conversion module; the signal modulation module is connected with the data acquisition module; and the control module is connected with the alternating current-direct current conversion module and the signal modulation module. Wherein the load impedance of the piezoelectric transduction module is dynamically adjusted by controlling the conduction time of the alternating current-direct current conversion module, so that the load impedance required by energy supply and data modulation is met, energy supply and data transmission can be carried out at the same time, and the data transmission efficiency is improved; in addition, during data transmission, the ultrasonic transducer does not need to be actively driven, the overall power consumption is reduced, and the temperature of the ultrasonic transducer does not need to be regulated and controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of data transmission, and in particular to a data transmission device and method. Background Art

[0002] Wireless power supply and data transmission technology based on ultrasound as an implant in the human body has demonstrated many significant advantages. For example, the use of wireless power supply and data transmission technology can achieve energy focusing at a greater depth (>10 cm) and focus the energy to the millimeter range. At the same time, due to the slow transmission speed of ultrasound, even at a lower frequency (such as 1MHZ), it can still achieve a millimeter-level focusing effect, which is particularly beneficial for applications with high spatial resolution requirements. In addition, ultrasound has a lower attenuation during transmission, which can further improve its transmission efficiency, and has higher transmission efficiency than RF far-field functions.

[0003] At present, active driving and pulse echo methods are mainly used for power supply and data transmission of implants in the human body based on ultrasound. The active driving method uses active driving of ultrasonic transducers for data transmission, and driving the ultrasonic transducer requires higher energy consumption, which increases the overall energy consumption of the system, and the heat generated by the active driving of the ultrasonic transducer needs to be further regulated to avoid excessive temperature of the ultrasonic transducer. The pulse echo method requires different load impedances during power supply and data transmission. When power is supplied, the impedance of the front end of the energy collection circuit is too low, resulting in the inability to perform data transmission. Therefore, power supply and data transmission cannot be performed at the same time, resulting in low data transmission efficiency.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a data transmission device and method to solve the problems in the prior art that the energy consumption is high when actively driving the ultrasonic transducer for data transmission and the ultrasonic transducer needs temperature control; and the pulse echo method cannot supply power and data transmission at the same time, resulting in low data transmission efficiency.

[0006] The technical solution adopted by the present invention to solve the technical problem is: to provide a data transmission device, comprising:

[0007] A piezoelectric transducer module is used to receive an ultrasonic signal, convert a portion of the received ultrasonic signal into a first alternating current signal, and reflect another portion of the received ultrasonic signal;

[0008] an AC-DC conversion module connected to the piezoelectric transducer module, the AC-DC conversion module being used to receive a first AC signal and output a first DC signal according to the first AC signal;

[0009] A data acquisition module, connected to the AC-DC conversion module, the data acquisition module is used to collect status data of the position to be monitored on the human body, and output a first digital signal according to the status data;

[0010] A signal modulation module connected to the data acquisition module, the signal modulation module is used to receive the first digital signal, and encode and demodulate the first digital signal to output a modulated signal;

[0011] A control module is connected to the AC-DC conversion module and the signal modulation module. The control module is used to receive the modulation signal and output a first control signal to the AC-DC conversion module according to the modulation signal to control the conduction time of the AC-DC conversion module.

[0012] The present invention further provides that the AC-DC conversion module comprises:

[0013] an active rectifying unit connected to the piezoelectric transducer module and the control module, the active rectifying unit being used to receive a first alternating current signal and output a second direct current signal according to the first alternating current signal, the control module being used to output the first control signal to the active rectifying unit according to the modulation signal, so as to control the conduction time of the active rectifying unit;

[0014] The DC-DC conversion unit is connected to the active rectification unit, and is used for receiving a second DC power signal and outputting a first DC power signal according to the second DC power signal.

[0015] The present invention further provides that the AC-DC conversion module comprises:

[0016] an active rectifying unit, connected to the piezoelectric transducer module, the active rectifying unit being used to receive a first alternating current signal and output a second direct current signal according to the first alternating current signal;

[0017] A DC-DC conversion unit is connected to the active rectification unit and the control module, the DC-DC conversion unit is used to receive a second DC signal and output a first DC signal according to the second DC signal, and the control module is used to output the first control signal to the DC-DC conversion unit according to the modulation signal to control the conduction time of the DC-DC conversion unit.

[0018] The present invention further provides that the AC-DC conversion module comprises:

[0019] an active rectifying unit, connected to the piezoelectric transducer module, the active rectifying unit being used to receive a first alternating current signal and output a second direct current signal according to the first alternating current signal;

[0020] a DC-DC conversion unit connected to the active rectifying unit, the DC-DC conversion unit being used to receive a second DC power signal and output a first DC power signal according to the second DC power signal;

[0021] A switch unit is connected to the control module, the input end of the DC-DC conversion unit is grounded through the switch unit, and the control module is used to output the first control signal to the switch unit according to the modulation signal to control the conduction time of the switch unit.

[0022] The present invention further provides that the AC-DC conversion module further includes: an energy storage unit, and the energy storage unit is arranged on the connection path between the switch unit and the ground.

[0023] The present invention further provides that the switch unit includes a first switch tube, the first switch tube is connected to the control module, and the DC-DC conversion unit is connected to the energy storage unit via the first switch tube.

[0024] The present invention is further arranged that the energy storage unit comprises an energy storage capacitor, one end of the energy storage capacitor is connected to the source of the first switch tube, and the other end of the energy storage capacitor is grounded.

[0025] The present invention is further arranged that the data acquisition module comprises:

[0026] A first sensor, connected to the AC-DC conversion module, and used to collect status data of the position to be monitored;

[0027] An analog-to-digital conversion unit is connected to the first sensor and the signal modulation module, and is used to receive the status data and output a first digital signal according to the status data.

[0028] The present invention further provides that the first sensor is a pressure sensor or a blood oxygen sensor.

[0029] The present invention also provides a method for applying the data transmission device as described above, the method comprising:

[0030] receiving an ultrasonic signal, converting a portion of the received ultrasonic signal into a first alternating current signal, and reflecting another portion of the received ultrasonic signal;

[0031] receiving a first alternating current signal, and outputting a first direct current signal according to the first alternating current signal;

[0032] Collecting status data of a position to be monitored on a human body, and outputting a first digital signal according to the status data;

[0033] receiving the first digital signal, and encoding and demodulating the first digital signal to output a modulated signal;

[0034] The modulation signal is received, and a first control signal is output to the AC-DC conversion module according to the modulation signal to control the on or off time of the AC-DC conversion module so that the modulation signal is carried on the reflected ultrasonic signal.

[0035] The beneficial effects of the present invention are:

[0036] The present invention discloses a data transmission device and method. The piezoelectric transducer module of the data transmission device is used to receive an ultrasonic signal, convert part of the ultrasonic signal into a first alternating current signal, and reflect another part of the ultrasonic signal; an alternating current-to-direct current conversion module is connected to the piezoelectric transducer module, and the alternating current-to-direct current conversion module is used to receive the first alternating current signal and convert the first alternating current signal into a first direct current signal; a data acquisition module is connected to the alternating current-to-direct current conversion module, and the data acquisition module is used to acquire status data of a position to be monitored by a human body, and output a first digital signal according to the status data; a signal modulation module is connected to the data acquisition module, and the signal modulation module is used to receive the first digital signal, and encode and demodulate the first digital signal to output a modulation signal to the ultrasonic signal reflected by the piezoelectric transducer module; a control module is connected to the alternating current-to-direct current conversion module and the signal modulation module, and the control module is used to receive the modulation signal, and output a first control signal to the alternating current-to-direct current conversion module according to the modulation signal, so as to control the on or off time of the alternating current-to-direct current conversion module, so that the modulation signal is carried on the reflected ultrasonic signal. In the technical solution of the present invention, when data is transmitted, the load impedance of the piezoelectric transducer module is affected by controlling the conduction time of the AC-DC conversion module, so that the load impedance of the piezoelectric transducer module is dynamically adjusted to meet the load impedance required in the energy supply and data modulation process, so that energy supply and data transmission can be carried out simultaneously, thereby improving data transmission efficiency; in addition, during data transmission, the modulated signal is carried on the ultrasonic signal reflected by the piezoelectric transducer module and transmitted to the outside, without actively driving the ultrasonic transducer, thereby reducing the overall power consumption and eliminating the need to regulate the temperature of the ultrasonic transducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0038] Figure 1 It is a principle block diagram of the data transmission device of the present invention.

[0039] Figure 2 It is a principle block diagram of a data transmission device in one embodiment of the present invention.

[0040] Figure 3 It is a principle block diagram of a data transmission device in another embodiment of the present invention.

[0041] Figure 4 It is a working principle diagram of a data transmission device and an ultrasonic transducer in one embodiment of the present invention.

[0042] Marks in the accompanying drawings: 100, piezoelectric transducer module; 200, AC-DC conversion module; 201, active rectifier unit; 202, DC-DC conversion unit; 203, switch unit; 204, energy storage unit; 300, data acquisition module; 301, first sensor; 302, analog-to-digital conversion unit; 400, signal modulation module; 500, control module; Q1, first switch tube; C1, energy storage capacitor; 600, ultrasonic transducer; 700, first area; 800, second area. DETAILED DESCRIPTION

[0043] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0044] In recent years, the high incidence and severity of neurological and cardiovascular diseases have prompted the continuous development of related diagnostic and treatment methods. In this context, data transmission devices implanted in the human body have gradually become one of the important directions for solving such problems. Through highly integrated micro-hardware, these systems can achieve real-time monitoring of physiological signals and provide necessary stimulation or feedback. However, miniaturized implantable systems still face many challenges in energy acquisition and data transmission, especially in how to achieve stable and efficient energy supply and reliable data communication. There are technical bottlenecks. These problems urgently need to be solved through the research and development of new technologies, so as to promote the development of energy transmission and data transmission technologies and achieve effective support for implants.

[0045] As an emerging wireless power supply technology for implants, ultrasonic energy transmission has shown many significant advantages. First, it can achieve energy focusing at a greater depth (>10 cm) and concentrate the energy to the millimeter range; and because the propagation speed of ultrasound is slow, even at lower frequencies (such as 1MHz), it can still achieve millimeter-level focusing effects, which is particularly beneficial for applications with high spatial resolution requirements. In addition, ultrasonic transmission has low attenuation in tissues, and the transmission efficiency can be further improved. Compared with RF far-field power supply, it has higher power transmission efficiency.

[0046] However, existing ultrasonic power supply and communication technologies for implants are limited by average transmission power, data rate and energy consumption, mainly due to the limitations of the current active drive method and pulse echo method. First, many current solutions use actively driven ultrasonic transducers to achieve uplink data transmission. This method drives the ultrasonic transducer at the implant end to achieve data transmission. However, driving the ultrasonic transducer requires high energy consumption, resulting in a significant increase in the overall power consumption of the system, which not only affects the energy sustainability of the implant, but also the heat generated by it needs to be further regulated to avoid tissue heating. In addition, the circuit of actively driving the ultrasonic transducer is complex, which is not conducive to long-term operation, especially for miniaturized implant devices.

[0047] On the other hand, in the pulse echo mode, existing studies have proposed different implementation methods: for example, the prior art proposes a fully implantable, wireless, battery-free real-time sensor system for deep tissue oxygen (O2) monitoring. The real-time sensor system uses a single ultrasound link to achieve power supply and downlink / uplink data transmission. The uplink data is transmitted by digital amplitude modulation of ultrasound backscatter. The prior art also proposes a 6.7mm 3Wireless, battery-free, millimeter-scale biosensor and stimulation implants use magnetoelectric energy transmission and pulse width modulation (PWM) backscattering for uplink data transmission, using a single magnetoelectric transducer to complete energy supply and data transmission. 3 Wireless, ultrasonically powered, free-floating neural recording implants achieve uplink data transmission through analog amplitude modulation of ultrasonic reflected waves. However, since these systems impose different load impedances on the sensors during energy reception and data modulation, power supply and data transmission cannot be performed simultaneously. Such interference causes the system to interrupt energy reception during data transmission, which in turn leads to discontinuous power supply, affecting the stability and energy efficiency of the system. It can be seen that the alternation of power supply and data communication in data transmission devices using pulse echo not only reduces the effective data transmission rate, but also makes the overall energy utilization efficiency low, which seriously restricts the overall performance of the system.

[0048] Based on the above problems, the present invention provides a data transmission device. Figure 1 As shown, the data transmission device may include a piezoelectric transducer module 100 , an AC-DC conversion module 200 , a data acquisition module 300 , a signal modulation module 400 and a control module 500 .

[0049] The piezoelectric transducer module 100 is used to receive ultrasonic signals, convert part of the ultrasonic signals in the received ultrasonic signals into first alternating current signals, and reflect other part of the ultrasonic signals in the received ultrasonic signals; the AC-DC conversion module 200 is connected to the piezoelectric transducer module 100, and the AC-DC conversion module 200 is used to receive the first alternating current signal and convert the first alternating current signal into a first direct current signal; the data acquisition module 300 is connected to the AC-DC conversion module 200, and the data acquisition module 300 is used to collect state data of the position to be monitored of the human body, and output a first digital signal according to the state data; the signal modulation module 400 is connected to the data acquisition module 300, and the signal modulation module 400 is used to receive the first digital signal (the first digital signal is a binary digital signal), and encode and demodulate the first digital signal to output a modulation signal; the control module 500 is connected to the AC-DC conversion module 200 and the signal modulation module 400, and the control module 500 is used to receive the modulation signal, and output a first control signal to the AC-DC conversion module 200 according to the modulation signal, so as to control the conduction time of the AC-DC conversion module 200.

[0050] The data transmission device can be implanted into the position to be monitored in the human body, for example, the data transmission device can be used to monitor the intraocular pressure and blood pressure of the human body. Specifically, the data transmission device is implanted into the human body, and an ultrasonic signal is emitted through an ultrasonic transducer 600 outside the body. At this time, the piezoelectric transducer module 100 can receive the ultrasonic signal. Among the ultrasonic signals received by the piezoelectric transducer module 100, part of the ultrasonic signal will be converted into a first alternating current signal by the piezoelectric transducer module 100, and another part of the ultrasonic signal will be reflected by the piezoelectric transducer module 100, and the ultrasonic signal reflected by the piezoelectric transducer module 100 will be received by the ultrasonic transducer 600.

[0051] In this embodiment, the piezoelectric transducer module 100 can be any piezoelectric transducer that can convert an ultrasonic signal into an alternating current signal, and the amplitude of the reflected ultrasonic signal is affected by its own load impedance, that is, the amplitude of the reflected ultrasonic signal will change with the change of the load impedance; for example, the piezoelectric transducer module 100 can be any piezoelectric transducer that can achieve the above functions. The AC-DC conversion module 200 is an AC-DC conversion module 200 that can convert AC into DC with two states of on and off. The signal modulation module 400 can be any digital circuit that can encode and modulate binary digital signals. Those skilled in the art can determine the specific circuit structure of the signal modulation module 400 according to requirements, and no excessive restrictions are made here.

[0052] In specific applications, the ultrasonic transducer 600 outside the body outputs an ultrasonic signal, and the piezoelectric transducer module 100 receives the ultrasonic signal. The piezoelectric transducer module 100 converts part of the received ultrasonic signal into a first alternating current signal to the AC-DC conversion module 200, and the piezoelectric transducer module 100 reflects another part of the received ultrasonic signal. The AC-DC conversion module 200 converts the first AC signal into a first DC signal and outputs it to the data acquisition module 300, supplying power to the data acquisition module 300. Thereafter, the data acquisition module 300 starts to work and collects The state data of the position to be monitored is collected, and a first digital signal is output according to the state data, wherein the first digital signal is a binary digital signal; after receiving the first digital signal, the signal modulation module 400 encodes and modulates the first digital signal by the signal modulation module 400, and then outputs a modulation signal (the modulation signal is a binary digital signal); after receiving the modulation signal, the control module 500 controls the conduction or shutdown of the AC-DC conversion module 200 according to the received modulation signal, so that the modulation signal is carried to the ultrasonic signal reflected by the piezoelectric transducer module 100, thereby realizing data transmission.

[0053] It can be seen that when the data transmission device is performing data transmission, it controls the conduction time of the AC-DC conversion module 200, thereby affecting the load impedance of the piezoelectric transducer module, so that the load impedance of the piezoelectric transducer module 100 is dynamically adjusted to meet the load impedance required in the process of energy supply and data modulation, so that energy supply and data transmission can be carried out simultaneously, thereby improving data transmission efficiency; in addition, during data transmission, the modulated signal is output to the ultrasonic signal reflected by the piezoelectric transducer module 100 and transmitted to the outside (using a passive backscattering mechanism), and there is no need to actively drive the ultrasonic transducer 600, thereby reducing the overall power consumption and there is no need to regulate the temperature of the ultrasonic transducer 600.

[0054] Here, it should be noted that, when data is transmitted, changes in the load impedance of the piezoelectric transducer module 100 will affect the amplitude of the ultrasonic signal reflected by the piezoelectric transducer. The amplitude of the reflected ultrasonic signal is dynamically adjusted by dynamically adjusting the load impedance of the piezoelectric transducer module 100, so that the modulated signal can be loaded into the reflected ultrasonic signal. When adjusting the load impedance of the piezoelectric transducer module, the load impedance of the piezoelectric transducer module can be adjusted by controlling the on and off of the AC-DC conversion module 200. The longer the on time of the AC-DC conversion module 200, the smaller the load impedance of the piezoelectric transducer module.

[0055] In this embodiment, when outputting ultrasonic signals, multiple ultrasonic transducers 600 may be used to output ultrasonic signals, and the stability of the data transmission device may be improved by redundant design. Similarly, multiple data transmission devices may be provided to receive ultrasonic signals, and the stability of the data transmission device may also be improved by redundant design.

[0056] In this embodiment, when the modulation module performs modulation, modulation methods such as BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), and 8QAM (Quadrature Amplitude Modulation) may be used.

[0057] In some embodiments, Figure 1As shown, the AC-DC conversion module 200 may include an active rectifier unit 201 and a DC-DC conversion unit 202; the active rectifier unit 201 is connected to the piezoelectric transducer module 100 and the control module 500, the active rectifier unit 201 is used to receive a first AC signal, and output a second DC signal according to the first AC signal, the control module 500 is used to output a first control signal to the active rectifier unit 201 according to the modulation signal to control the conduction or shutdown of the active rectifier unit 201; the DC-DC conversion unit 202 is connected to the active rectifier unit 201, the DC-DC conversion unit 202 is used to receive the second DC signal, and output a first DC signal according to the second DC signal.

[0058] Specifically, the active rectifier unit 201 also includes two states: on and off. When controlling the on time of the AC-DC conversion module 200 , the on time of the AC-DC conversion module 200 can be controlled by controlling the on time of the active rectifier unit 201 .

[0059] In this embodiment, the active rectifier unit 201 is an active rectifier. The control module 500 is a digital circuit constructed by a time delayer. When the conduction time of the AC-DC conversion module 200 is specifically controlled, after the digital circuit constructed by the time delayer receives the modulation signal, when the received modulation signal is "1", the time delayer starts to work, so that the conduction time of the active rectifier becomes longer (the specific conduction time is related to the time preset in the time delayer). When the received modulation signal is "0", the time delayer stops working, and the turn-off time of the active rectifier does not change. This method is used to control the conduction time of the AC-DC conversion module 200. The digital circuit constructed by the time delayer can be any digital circuit that can achieve the above functional requirements, and no excessive restrictions are made here.

[0060] In this embodiment, the active rectifier is an active rectifier constructed using switching tubes, comparators and other devices in the prior art. When the active rectifier is turned on, the voltage at an input terminal on the comparator is compared with the ground potential. When the voltage is greater than the ground potential, the active rectifier is turned on, and when the voltage is less than the ground potential, the active rectifier is turned off.

[0061] In this embodiment, if Figure 4 As shown, when the data transmission device is specifically configured, the piezoelectric transducer module 100, the active rectifier unit 201, the DC-DC conversion unit 202, the data acquisition module 300, the signal modulation module 400 and the control module 500 can be arranged on the same integrated circuit board, wherein the active rectifier unit 201, the DC-DC conversion unit 202 and the data acquisition module 300 are arranged in the first area 700, and the control module 300 and the signal modulation module 400 are arranged in the second area 800.

[0062] Furthermore, if Figure 2 As shown, the DC-DC conversion unit 202 can also be connected to the control module 500. When the DC-DC conversion unit 202 is connected to the control module 500, the control module 500 is used to output a first control signal to the DC-DC conversion unit 202 according to the modulation signal to control the conduction time of the DC-DC conversion unit 202.

[0063] Specifically, the DC-DC conversion unit 202 also includes two states: on and off. When controlling the on time of the AC-DC conversion module 200, the on and off frequency of the DC-DC conversion unit 202 can also be controlled to control the on and off time of the AC-DC conversion module 200.

[0064] In this embodiment, the DC-DC conversion unit 202 can be a DC-DC converter, and the control module 500 is a digital circuit capable of setting the on and off frequency of the DC-DC converter, and the on time of the AC-DC module is controlled by controlling the on and off frequency of the DC-DC converter. In specific control, when the received modulation signal is "1", the digital circuit can control the switching frequency of the DC-DC converter to be f1, that is, when the received modulation signal is "1", the digital circuit controls the DC-DC converter to work at the switching frequency f1; when the received modulation signal is "0", the switching frequency of the DC-DC converter can be controlled to be f2, that is, when the received modulation signal is "0", the digital circuit controls the DC-DC converter to work at the switching frequency f2, and the load impedance of the DC-DC converter is controlled by controlling the frequency of the DC-DC converter (the switching frequency of the DC-DC converter is different, and its load impedance is also different, that is, after changing the switching frequency of the DC-DC converter, the load impedance of the DC-DC converter will also change).

[0065] In this embodiment, the control module 500 can be any digital circuit that can achieve the above requirements, and no further limitation is given here.

[0066] In this embodiment, if Figure 4 As shown, when the data transmission device is specifically configured, the piezoelectric transducer module 100, the active rectifier unit 201, the DC-DC conversion unit 202, the data acquisition module 300, the signal modulation module 400 and the control module 500 can be arranged on the same integrated circuit board, wherein the active rectifier unit 201, the DC-DC conversion unit 202 and the data acquisition module 300 are arranged in the first area 700, and the control module 500 and the signal modulation module 400 are arranged in the second area 800.

[0067] In some embodiments, Figure 3As shown, the AC-DC conversion module 200 also includes a switch unit 203, which is connected to the control module 500. The input end of the DC-DC conversion unit 202 is grounded via the switch unit 203, that is, the switch unit 203 is arranged in series on the connection path between the DC-DC conversion unit 202 and the ground. The control module 500 is used to output a first control signal to the switch unit 203 according to the modulation signal to control the conduction or shutdown of the switch unit 203.

[0068] In this embodiment, since the input end of the DC-DC conversion unit 202 is grounded via the switch unit 203, that is, one end of the switch unit 203 is connected to the connection path between the DC-DC conversion unit 202 and the active rectification unit 201, and the other end of the switch unit 203 is grounded, when the switch unit 203 is in the on state, the DC-DC conversion unit 202 cannot receive the second DC signal and cannot output the first DC signal, which is equivalent to the DC-DC conversion unit 202 being in the off state.

[0069] It can be seen that when controlling the on and off of the DC-DC conversion unit 202, the on and off frequencies of the switch unit 203 can be controlled by the control module 500, that is, when controlling the on time of the AC-DC conversion module 200, the on and off frequencies of the switch unit 203 can be controlled by the control module 500.

[0070] In some embodiments, Figure 3 As shown, the AC-DC conversion module 200 further includes an energy storage unit 204 , which is disposed on a connection path between the switch unit 203 and the ground.

[0071] In this embodiment, since the energy storage unit 204 is arranged on the connection path between the switch unit 203 and the ground, when the switch unit 203 is in the on state, the second DC signal output by the active rectifier unit 201 charges the energy storage unit 204, and the energy storage unit 204 starts to store energy. The energy storage unit 204 can be used to supply energy to other devices in the data transmission device, thereby improving energy utilization.

[0072] In this embodiment, if Figure 4 As shown, when the data transmission device is specifically configured, the piezoelectric transducer module 100, the active rectifier unit 201, the DC-DC conversion unit 202, the switch unit 203, the energy storage unit 204, the data acquisition module 300, the signal modulation module 400 and the control module 500 can be arranged on the same integrated circuit board, wherein the active rectifier unit 201, the DC-DC conversion unit 202, the switch unit 203, the energy storage unit 204 and the data acquisition module 300 are arranged in the first area 700, and the control module 500 and the signal modulation module 400 are arranged in the second area 800.

[0073] In some embodiments, Figure 3 As shown, the switch unit 203 may include a first switch tube Q1 , and the DC-DC conversion unit 202 is connected to the energy storage unit 204 via the first switch tube Q1 .

[0074] Specifically, the first switch tube Q1 can be a MOS tube (Metal-Oxide-Semiconductor Field-Effect Transistor), a triode or other switch tubes, and those skilled in the art can determine the first switch tube Q1 according to actual conditions. The on and off of the first switch tube Q1 is the on and off of the switch unit 203.

[0075] In this embodiment, the control module 500 is a digital circuit capable of controlling the first switch tube Q1. During specific control, the digital circuit can control the first switch tube Q1 to be turned on when the received modulation signal is "1"; and control the first switch tube Q1 to be turned off when the received modulation signal is "0". The control module 500 can be any digital circuit that can achieve the above requirements, and no further limitations are made here.

[0076] Furthermore, if Figure 3 As shown, the energy storage unit 204 may include an energy storage capacitor C1 , one end of the energy storage capacitor C1 is connected to the first switch tube Q1 , and the other end of the energy storage capacitor C1 is grounded.

[0077] In some embodiments, Figure 3 As shown, the data acquisition module 300 may include a first sensor 301 and an analog-to-digital conversion unit 302; the first sensor 301 is connected to the AC-DC conversion module 200, and the first sensor 301 is used to collect status data of the position to be monitored; the analog-to-digital conversion unit 302 is connected to the first sensor 301 and the signal modulation module 400, and the analog-to-digital conversion unit 302 is used to receive the status data and output a first digital signal according to the status data.

[0078] In specific applications, the status data of the monitored position is collected by the first sensor 301. The status data is an analog signal and needs to be converted into a digital signal. Therefore, the status data collected by the first sensor 301 is transmitted to the analog-to-digital conversion unit 302 and converted into a first digital signal and output to the signal modulation module 400; the analog-to-digital conversion unit 302 can be any analog-to-digital converter (ADC, Analog to Digital Converter) that can achieve the above-mentioned functional requirements, and no excessive restrictions are made here.

[0079] Among them, the first sensor 301 is determined to be related to the position to be monitored. For example, when monitoring intraocular pressure at the eye position, the first sensor 301 can be a pressure sensor; for another example, when monitoring blood pressure in a blood vessel, the first sensor 301 can be a blood oxygen sensor.

[0080] In specific applications, the digital transmission device can be applied to implantable medical devices that require miniaturization, low power consumption, and long service life, so that the implantable medical device can transmit data while obtaining electrical energy.

[0081] In some embodiments, the present invention further provides a method for applying the data transmission device as described above, the method comprising the steps of:

[0082] S100, receiving an ultrasonic signal, converting part of the received ultrasonic signal into a first alternating current signal, and reflecting another part of the received ultrasonic signal;

[0083] S200, receiving a first alternating current signal, and outputting a first direct current signal according to the first alternating current signal;

[0084] S300, collecting status data of a position to be monitored on a human body, and outputting a first digital signal according to the status data;

[0085] S400, receiving a first digital signal, and encoding and demodulating the first digital signal to output a modulated signal;

[0086] S500, receiving a modulation signal, and outputting a first control signal to an AC-DC conversion module according to the modulation signal, so as to control a conduction time of the AC-DC conversion module.

[0087] Specifically, an ultrasonic signal is emitted by an ultrasonic transducer 600 outside the body. When the piezoelectric transducer module inside the body receives the ultrasonic signal, part of the ultrasonic signal in the received ultrasonic signal is converted into a first alternating current signal to the AC-DC conversion module. The AC-DC conversion module converts the first AC signal into a first direct current signal and then supplies power to the data acquisition module. Thereafter, the data acquisition module starts to work, collects status data of the position to be monitored, and outputs a first digital signal according to the status data. After receiving the first digital signal, the signal modulation module encodes and modulates the first digital signal by the signal modulation module and then outputs a modulation signal. After receiving the modulation signal, the control module controls the conduction time of the AC-DC conversion module according to the received modulation signal, so that the modulation signal is carried to the ultrasonic signal reflected by the piezoelectric transducer module, thereby realizing data transmission.

[0088] In this embodiment, when the data transmission device is performing data transmission, it controls the conduction time of the AC-DC conversion module, thereby affecting the load impedance of the piezoelectric transducer module, so that the load impedance of the piezoelectric transducer module is dynamically adjusted to meet the load impedance required in the process of energy supply and data modulation, so that energy supply and data transmission can be carried out simultaneously, thereby improving data transmission efficiency; in addition, during data transmission, the modulated signal is output to the ultrasonic signal reflected by the piezoelectric transducer module and transmitted to the outside, without the need to actively drive the ultrasonic transducer 600, thereby reducing the overall power consumption and eliminating the need to regulate the temperature of the ultrasonic transducer 600.

[0089] Here, it should be pointed out that the description of the above data transmission method embodiment is similar to the description of the above data transmission device embodiment, and has similar beneficial effects as the above data transmission device. For technical details not disclosed in the data transmission method embodiment, please refer to the description of the data transmission device embodiment of the present invention for understanding.

[0090] In summary, the present invention provides a data transmission device and method, which have the following beneficial effects:

[0091] When data is transmitted, the on or off time of the AC-DC conversion module is controlled to affect the load impedance of the piezoelectric transducer module, so that the load impedance of the piezoelectric transducer module is dynamically adjusted to meet the load impedance required in the energy supply and data modulation process, so that energy supply and data transmission can be carried out simultaneously, thereby improving data transmission efficiency; in addition, when data is transmitted, the modulated signal is output to the ultrasonic signal reflected by the piezoelectric transducer module and transmitted to the outside, without actively driving the ultrasonic transducer 600, thereby reducing the overall power consumption and eliminating the need to control the temperature of the ultrasonic transducer 600.

[0092] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A data transmission device, characterized in that: include: A piezoelectric transducer module is used to receive an ultrasonic signal, convert a portion of the received ultrasonic signal into a first alternating current signal, and reflect another portion of the received ultrasonic signal; an AC-DC conversion module connected to the piezoelectric transducer module, the AC-DC conversion module being used to receive a first AC signal and output a first DC signal according to the first AC signal; A data acquisition module, connected to the AC-DC conversion module, the data acquisition module is used to collect status data of the position to be monitored on the human body, and output a first digital signal according to the status data; A signal modulation module connected to the data acquisition module, the signal modulation module is used to receive the first digital signal, and encode and demodulate the first digital signal to output a modulated signal; A control module is connected to the AC-DC conversion module and the signal modulation module. The control module is used to receive the modulation signal and output a first control signal to the AC-DC conversion module according to the modulation signal to control the conduction time of the AC-DC conversion module.

2. The data transmission device according to claim 1, characterized in that: The AC-DC conversion module comprises: an active rectifying unit connected to the piezoelectric transducer module and the control module, the active rectifying unit being used to receive a first alternating current signal and output a second direct current signal according to the first alternating current signal, the control module being used to output the first control signal to the active rectifying unit according to the modulation signal, so as to control the conduction time of the active rectifying unit; The DC-DC conversion unit is connected to the active rectification unit, and is used for receiving a second DC power signal and outputting a first DC power signal according to the second DC power signal.

3. The data transmission device according to claim 1, characterized in that: The AC-DC conversion module comprises: an active rectifying unit, connected to the piezoelectric transducer module, the active rectifying unit being used to receive a first alternating current signal and output a second direct current signal according to the first alternating current signal; A DC-DC conversion unit is connected to the active rectification unit and the control module, the DC-DC conversion unit is used to receive a second DC signal and output a first DC signal according to the second DC signal, and the control module is used to output the first control signal to the DC-DC conversion unit according to the modulation signal to control the conduction time of the DC-DC conversion unit.

4. The data transmission device according to claim 1, characterized in that: The AC-DC conversion module comprises: an active rectifying unit, connected to the piezoelectric transducer module, the active rectifying unit being used to receive a first alternating current signal and output a second direct current signal according to the first alternating current signal; a DC-DC conversion unit connected to the active rectifying unit, the DC-DC conversion unit being used to receive a second DC power signal and output a first DC power signal according to the second DC power signal; A switch unit is connected to the control module, the input end of the DC-DC conversion unit is grounded through the switch unit, and the control module is used to output the first control signal to the switch unit according to the modulation signal to control the conduction time of the switch unit.

5. The data transmission device according to claim 4, characterized in that: The AC-DC conversion module further includes: an energy storage unit, which is arranged on a connection path between the switch unit and the ground.

6. The data transmission device according to claim 5, characterized in that: The switch unit includes a first switch tube, the first switch tube is connected to the control module, and the DC-DC conversion unit is connected to the energy storage unit via the first switch tube.

7. The data transmission device according to claim 6, characterized in that: The energy storage unit includes an energy storage capacitor, one end of the energy storage capacitor is connected to the source of the first switch tube, and the other end of the energy storage capacitor is grounded.

8. The data transmission device according to claim 1, characterized in that: The data acquisition module comprises: A first sensor, connected to the AC-DC conversion module, and used to collect status data of the position to be monitored; An analog-to-digital conversion unit is connected to the first sensor and the signal modulation module, and is used to receive the status data and output a first digital signal according to the status data.

9. The data transmission device according to claim 8, characterized in that: The first sensor is a pressure sensor or a blood oxygen sensor.

10. A method for using the data transmission device according to any one of claims 1 to 9, characterized in that: The method comprises: receiving an ultrasonic signal, converting a portion of the received ultrasonic signal into a first alternating current signal, and reflecting another portion of the received ultrasonic signal; receiving a first alternating current signal, and outputting a first direct current signal according to the first alternating current signal; Collecting status data of a position to be monitored on a human body, and outputting a first digital signal according to the status data; receiving the first digital signal, and encoding and demodulating the first digital signal to output a modulated signal; The modulation signal is received, and a first control signal is output to the AC-DC conversion module according to the modulation signal to control the conduction time of the AC-DC conversion module.

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