CN114759689B - Wireless power supply device - Google Patents
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- CN114759689B CN114759689B CN202210659722.2A CN202210659722A CN114759689B CN 114759689 B CN114759689 B CN 114759689B CN 202210659722 A CN202210659722 A CN 202210659722A CN 114759689 B CN114759689 B CN 114759689B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 164
- 238000004891 communication Methods 0.000 claims description 20
- 230000000087 stabilizing effect Effects 0.000 claims description 18
- 238000004088 simulation Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 description 17
- 238000010168 coupling process Methods 0.000 description 17
- 238000005859 coupling reaction Methods 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 16
- 230000001965 increasing effect Effects 0.000 description 15
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000001939 inductive effect Effects 0.000 description 6
- 210000004556 brain Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 210000003423 ankle Anatomy 0.000 description 1
- 239000000560 biocompatible material Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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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
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
Abstract
The invention provides a wireless power supply device, belonging to the technical field of electronics, and the device comprises: the energy transmission module comprises a first electrode and a second electrode, and the energy receiving module comprises a third electrode and a fourth electrode; the energy transmitting module is used for transmitting a first electric signal to the surface of the biological tissue through the first electrode, and the frequency of the first electric signal is a target transmission frequency; the energy receiving module is used for receiving a second electric signal corresponding to the first electric signal from the biological tissue through the third electrode, converting the second electric signal into direct-current voltage and outputting the direct-current voltage to the brain-computer interface device. According to the embodiment of the invention, a circuit closed loop can be formed through a forward path between the first electrode and the third electrode and a reverse path between the second electrode and the fourth electrode, the first electric signal is transmitted along the forward path, the energy receiving module receives the second electric signal from the forward path, and the miniaturization, no limitation of a specific position and transmission distance increase can be realized.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a wireless power supply device.
Background
The power supply module is an important component of a computer-computer interface system, but the miniaturized battery is difficult to meet the power consumption of a high-flux chip, needs to be replaced frequently, and is easy to cause biological tissue infection. Research on related technologies focuses on wireless power supply technologies to achieve stable power supply to a computer-computer interface system.
In the related art, power is generally supplied to the brain-computer interface system through a near-field inductive resonant coupling mode, but the near-field inductive coupling scheme has the problems of large coil volume, difficult coil alignment and short transmission distance.
Disclosure of Invention
The invention provides a wireless power supply device, which is used for overcoming the defects of large coil volume, difficult coil alignment and short transmission distance in the prior art, realizing volume miniaturization, being not limited by a specific position and increasing the transmission distance.
The present invention provides a wireless power supply device, including: the energy transmission module comprises a first electrode and a second electrode, and the energy receiving module comprises a third electrode and a fourth electrode;
the energy sending module is used for sending a first electric signal to the surface of the biological tissue through the first electrode, and the frequency of the first electric signal is a target transmission frequency;
the energy receiving module is used for receiving a second electric signal corresponding to the first electric signal from biological tissues through the third electrode, converting the second electric signal into direct-current voltage and outputting the direct-current voltage to the brain-computer interface equipment;
the first electrode is in contact connection with the surface of the biological tissue, and the second electrode is not connected with the biological tissue; the third electrode is in contact connection with the biological tissue; the fourth electrode is not connected to the biological tissue.
Optionally, according to a wireless power supply apparatus provided by the present invention, the energy transmission module includes a power supply unit and a resonant network unit;
the resonant network unit is used for adjusting the output impedance of the energy sending module based on the target transmission frequency and the target resonance parameter to obtain the first electric signal;
wherein the target resonance parameter is used to characterize an inductance-capacitance configuration of the resonant network element.
Optionally, according to the wireless power supply apparatus provided by the present invention, the resonant network unit is further configured to adjust the target resonant parameter based on a fixed target transmission frequency and an impedance parameter corresponding to the first electrode, so that the first electrode is in an impedance matching state.
Optionally, according to a wireless power supply apparatus provided by the present invention, the fixed target transmission frequency is determined based on a measured scattering parameter between a first port and a second port, where the first port is a port between the first electrode and the second electrode, and the second port is a port between the third electrode and the fourth electrode.
Optionally, according to a wireless power supply apparatus provided by the present invention, the resonant network unit is further configured to adjust the target transmission frequency based on a fixed target resonance parameter and the transmission power of the energy transmission module, so as to maximize the transmission power of the energy transmission module.
Optionally, according to the wireless power supply apparatus provided by the present invention, a value of the target transmission frequency ranges from 100kHz to 200 MHz.
Optionally, according to a wireless power supply apparatus provided by the present invention, the energy receiving module includes a front end receiving unit, a rectifying unit, and a voltage stabilizing unit;
the front end receiving unit is used for adjusting the second electric signal to obtain a third electric signal;
the rectifying unit is used for rectifying the third electric signal to obtain a rectified output voltage;
the voltage stabilizing unit is used for outputting direct current voltage based on the rectified output voltage.
Optionally, according to a wireless power supply apparatus provided by the present invention, the front end receiving unit includes an inductor capacitor array;
the inductance-capacitance array is used for adjusting target array parameters of the inductance-capacitance array based on the rectification output voltage and outputting the third electric signal to the rectification unit so as to enable the rectification output voltage to be maximum, and the target array parameters are used for representing inductance-capacitance configuration of the inductance-capacitance array.
Optionally, according to a wireless power supply apparatus provided by the present invention, the energy transmitting module includes a first wireless communication module, and the energy receiving module includes a second wireless communication module;
the first wireless communication module is configured to receive the rectified output voltage from the second wireless communication module;
the second wireless communication module is used for sending the rectified output voltage to the first wireless communication module;
the resonant network unit is configured to adjust the target transmission frequency based on a fixed target resonance parameter, the transmission power of the energy transmission module, and the rectified output voltage to maximize the rectified output voltage.
Optionally, according to a wireless power supply apparatus provided by the present invention, the energy receiving module further includes: a battery cell;
the voltage stabilizing unit is also used for outputting direct-current voltage to charge the battery unit;
the battery unit is used for supplying power to the brain-computer interface equipment.
According to the wireless power supply device provided by the invention, a closed circuit loop for energy transmission can be formed through a forward path between the first electrode and the third electrode and a reverse path between the second electrode and the fourth electrode, a first electric signal of a target transmission frequency can be transmitted along the forward path, the energy receiving module can receive a second electric signal from the forward path, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be contacted with any position on the surface of biological tissue, the limitation of a specific position can be avoided, the biological tissue is used as a conductive medium, the conductivity is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a wireless power supply apparatus provided in the present invention;
fig. 2 is a second schematic structural diagram of a wireless power supply apparatus provided in the present invention;
fig. 3 is a schematic diagram of a debugging process of the wireless power supply device provided by the present invention.
Detailed Description
In order to facilitate a clearer understanding of embodiments of the present invention, some relevant background information is first presented below.
In the related art, the wireless power supply technologies applied to the field of the brain-computer interface mainly include near-field inductive coupling, near-field capacitive coupling, ultrasonic and mid-field and far-field electromagnetic coupling technologies, and the like.
The near-field capacitive coupling technology is based on the electric field coupling principle, takes biological tissues as media, and realizes energy transmission through displacement current generated between two pairs of capacitors. The ultrasonic energy transmission technology is that transmitted ultrasonic waves are utilized to wirelessly transmit energy, an ultrasonic oscillator generates sound waves through surface vibration, and the sound waves are transmitted to a piezoelectric converter at the other end through biological tissues, so that the sound wave energy is converted into electric energy. The medium-field and far-field electromagnetic coupling technology is based on radiation of an electromagnetic field, and an antenna on an energy receiving side receives high-frequency energy radiated from an external coil.
According to performance requirements of a brain-computer interface such as transmission distance and transmission power, the most common wireless power supply scheme is a near-field inductive coupling technology. The technology is based on the electromagnetic induction principle, and a transmitting coil positioned outside a brain transmits energy to a receiving coil on an energy receiving side through resonance coupling, so that power supply of a brain-computer interface system is realized.
The near-field inductive coupling technology mainly has the following disadvantages:
(1) large coils are needed, the infection risk is increased by the large-volume coils, and long-term stable use is difficult to realize;
(2) the coil has alignment problem and low flexibility, and because the brain-computer interface equipment moves, the coil is difficult to keep alignment state, and the transmission efficiency is greatly reduced;
(3) the transmission distance is short, the distance between the transmitting coil and the receiving coil is limited due to near-field electromagnetic coupling power supply, the transmission efficiency in the short distance is high, and the transmission efficiency can be rapidly reduced along with the increase of the distance.
For the near-field capacitive coupling technology, the energy transmission efficiency is sensitive to the change of the relative position of capacitance between a transmitting end and a receiving end, and the transmission distance is limited. The ultrasonic energy transmission technology requires a piezoelectric transducer, which further increases the cost, and the energy transmission efficiency is easily affected by the distance between the transmitting end and the receiving end, the change of biological tissues, and the like. The energy transmission efficiency of the medium-field or far-field electromagnetic coupling technology is low, and the power requirement of a brain-computer interface system is difficult to meet.
Therefore, the existing wireless power supply scheme has the defects of large coil volume, alignment requirement, low flexibility, short transmission distance, high transmission loss, limitation of the moving range of a user and the like.
In order to overcome the above-mentioned drawbacks, the present invention provides a wireless power supply device, which can be miniaturized in size by an energy transmitting module and an energy receiving module, and can increase a transmission distance without being limited by a specific location.
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a wireless power supply apparatus provided in the present invention, and as shown in fig. 1, the apparatus includes: an energy transmitting module 101 and an energy receiving module 102, wherein the energy transmitting module comprises a first electrode and a second electrode, and the energy receiving module comprises a third electrode and a fourth electrode;
the energy sending module is used for sending a first electric signal to the surface of the biological tissue through the first electrode, and the frequency of the first electric signal is a target transmission frequency;
the energy receiving module is used for receiving a second electric signal corresponding to the first electric signal from biological tissues through the third electrode, converting the second electric signal into direct-current voltage and outputting the direct-current voltage to the brain-computer interface equipment;
the first electrode is in contact connection with the biological tissue surface, and the second electrode is not in connection with the biological tissue; the third electrode is in contact connection with the biological tissue; the fourth electrode is not connected to the biological tissue.
Specifically, the energy transmitting module can be placed at any position of the body surface (such as a wrist or an ankle), the energy receiving module can be placed on the body surface or in the body, and the energy transmitting module can radiate energy to the energy receiving module;
the first electrode of the energy sending module is in contact connection with the surface of biological tissue, the third electrode of the energy receiving module is in contact connection with the biological tissue, a forward path can be formed, a reverse path can be formed through a coupling capacitor between the second electrode of the energy sending module and the fourth electrode of the energy receiving module, and based on the forward path and the reverse path, a circuit closed loop for energy transmission can be formed, so that a first electric signal of a target transmission frequency sent by the energy sending module can be subjected to energy transmission along the forward path, and then the energy receiving module can receive a second electric signal corresponding to the first electric signal from the forward path, convert the second electric signal into direct-current voltage, and further supply power to the brain-computer interface device;
wherein, the energy is transmitted through the forward path, and the energy transmission on the surface or in the body of the animal body can be realized by using the animal body (including the human body) as a conductive medium.
Optionally, the third electrode of the energy receiving module may be in contact with biological tissue beneath the brain.
It is understood that the conductivity of the medium using animal body as the conductive medium (as shown in fig. 1, using biological tissue as the transmission medium) is higher than that of the medium using air (the conductive medium used in the wireless energy transmission technology based on the electromagnetic principle), so that the energy loss is relatively low and the transmission distance can be increased; the animal body is used as a conductive medium to transmit energy, only miniaturized electrodes are needed, and a large-volume antenna or capacitor is not needed, so that the miniaturization of a computer-computer interface system can be realized; the first electrode of the energy transmission module only needs to be in contact with an animal body, the limitation of a specific position is avoided, the defects of difficult alignment of an antenna or a capacitor in the near-field inductive coupling technology and the near-field capacitive coupling technology are avoided, and the moving range of a user can be enlarged.
According to the wireless power supply device provided by the invention, a closed circuit loop for energy transmission can be formed through a forward path between the first electrode and the third electrode and a reverse path between the second electrode and the fourth electrode, a first electric signal of a target transmission frequency can be transmitted along the forward path, the energy receiving module can receive a second electric signal from the forward path, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be contacted with any position on the surface of biological tissue, the restriction of a specific position can be realized, the conductivity of the biological tissue serving as a conductive medium is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the energy transmission module includes a power supply unit and a resonant network unit;
the resonant network unit is used for adjusting the output impedance of the energy sending module based on the target transmission frequency and the target resonance parameter to obtain the first electric signal;
wherein the target resonance parameter is used to characterize an inductance-capacitance configuration of the resonant network element.
Specifically, the energy transmission module may include a power supply unit and a resonant network unit, the power supply unit may provide a supply voltage to the resonant network unit, and then the resonant network unit may adjust an output impedance of the energy transmission module based on a target transmission frequency and a target resonance parameter, to obtain a first electrical signal, and then the first electrical signal of the target transmission frequency transmitted by the energy transmission module may perform energy transmission along a forward path, and then the energy reception module may receive a second electrical signal corresponding to the first electrical signal from the forward path, and convert the second electrical signal into a direct current voltage, and then may supply power to the computer interface device.
It can be understood that on the basis of miniaturization of the electrodes, by adjusting circuit parameters in real time, the energy transmission efficiency can be improved, and stable direct-current voltage can be provided for the computer interface device.
Therefore, the resonant network unit can adjust the output impedance of the energy transmitting module based on the target transmission frequency and the target resonance parameter, the acquired first electric signal can be used for energy transmission along the forward path, the energy receiving module can receive the second electric signal corresponding to the first electric signal from the forward path and convert the second electric signal into direct-current voltage, and then the power can be supplied to the brain-computer interface device, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be in contact with any position on the surface of the biological tissue and is not limited by a specific position, the biological tissue is used as a conductive medium, the conductivity of the biological tissue is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the resonant network unit is further configured to adjust the target resonance parameter based on a fixed target transmission frequency and an impedance parameter corresponding to the first electrode, so that the first electrode is in an impedance matching state.
Specifically, the energy transmission module may include a power supply unit and a resonant network unit, the power supply unit may provide a power supply voltage to the resonant network unit, and the resonant network unit may adjust a target resonance parameter based on a fixed target transmission frequency and an impedance parameter corresponding to the first electrode, so that the first electrode is in an impedance matching state, and energy transmission loss may be reduced;
specifically, a first electrical signal of a target transmission frequency sent by the energy sending module may perform energy transmission along a forward path, and then the energy receiving module may receive a second electrical signal corresponding to the first electrical signal from the forward path, and convert the second electrical signal into a direct current voltage, and then may supply power to the brain-computer interface device.
It can be understood that on the basis of miniaturization of the electrodes, by adjusting circuit parameters in real time, the energy transmission efficiency can be improved, and stable direct-current voltage can be provided for the computer interface device.
It can be understood that the energy transmission module may dynamically adjust the target resonance parameter of the resonant network unit based on the two-port impedance matching, may implement maximum effective transmission energy, and may improve the wireless energy transmission efficiency.
Therefore, the first electrode can be in an impedance matching state through the resonant network unit, energy transmission loss can be reduced, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be in contact with any position on the surface of the biological tissue and is not limited by a specific position, the conductivity of the biological tissue serving as a conductive medium is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the fixed target transmission frequency is determined based on a measured scattering parameter between a first port and a second port, the first port being a port between the first electrode and the second electrode, the second port being a port between the third electrode and the fourth electrode.
Specifically, after the electrodes of the energy transmission module and the electrodes of the energy reception module are configured, a vector network analyzer may be used, two ports of which are respectively connected to a first port and a second port through a balun, the first port being a port between the first electrode and the second electrode, and the second port being a port between the third electrode and the fourth electrode, and scattering parameters (S parameters) of the two ports are measured in a frequency band of 100kHz to 200 MHz. And introducing electromagnetic simulation software to obtain two-port impedance parameters, performing full-band dual-port impedance simulation, obtaining an optimal frequency point, namely fixed target transmission frequency, under the condition of full matching of the two ports, and taking the frequency point as the transmission frequency.
It can be understood that, on the basis of the miniaturized electrode, the first electric signal is transmitted based on the target transmission frequency determined by the measured scattering parameter, so that the energy transmission efficiency can be improved, and stable direct-current voltage can be provided for the brain-computer interface device.
Therefore, the fixed target transmission frequency is determined based on the measured scattering parameters between the first port and the second port, the first port is a port between the first electrode and the second electrode, the second port is a port between the third electrode and the fourth electrode, and then the first electric signal is transmitted based on the fixed target transmission frequency, so that the energy transmission loss can be reduced, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be contacted with any position on the surface of the biological tissue, the limitation of a specific position is avoided, the conductivity of the biological tissue serving as a conductive medium is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the resonant network unit is further configured to adjust the target transmission frequency based on a fixed target resonance parameter and the transmission power of the energy transmission module, so as to maximize the transmission power of the energy transmission module.
Specifically, the energy transmission module may include a power supply unit and a resonant network unit, the power supply unit may provide a supply voltage to the resonant network unit, and the resonant network unit may adjust the target transmission frequency based on the fixed target resonance parameter and the transmission power of the energy transmission module, so as to maximize the transmission power of the energy transmission module;
specifically, a first electrical signal of a target transmission frequency sent by the energy sending module may perform energy transmission along a forward path, and then the energy receiving module may receive a second electrical signal corresponding to the first electrical signal from the forward path, and convert the second electrical signal into a direct current voltage, and then may supply power to the brain-computer interface device.
It can be understood that on the basis of miniaturization of the electrodes, by adjusting circuit parameters in real time, the energy transmission efficiency can be improved, and stable direct-current voltage can be provided for the computer interface device.
Therefore, the transmitting power of the energy transmitting module can be maximized through the resonant network unit, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be in contact with any position on the surface of the biological tissue, the limitation of a specific position is avoided, the conductivity of the biological tissue serving as a conductive medium is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the target transmission frequency ranges from 100kHz to 200 MHz.
Optionally, the value of the target transmission frequency may be 100kHz, and then a first electrical signal of 100kHz sent by the energy sending module may transmit energy along the forward path, and then the energy receiving module may receive a second electrical signal corresponding to the first electrical signal from the forward path, and convert the second electrical signal into a direct current voltage, and then may supply power to the brain-computer interface device.
Optionally, the value of the target transmission frequency may be 100MHz, and then the 100MHz first electrical signal sent by the energy sending module may perform energy transmission along the forward path, and then the energy receiving module may receive the second electrical signal corresponding to the first electrical signal from the forward path, and convert the second electrical signal into a direct current voltage, and then may supply power to the brain-computer interface device.
Optionally, the value of the target transmission frequency may be 200MHz, and then the 200MHz first electrical signal sent by the energy sending module may perform energy transmission along the forward path, and then the energy receiving module may receive the second electrical signal corresponding to the first electrical signal from the forward path, and convert the second electrical signal into a direct current voltage, and then may supply power to the brain-computer interface device.
It can be understood that the value range of the target transmission frequency may be 100kHz to 200MHz, and the energy transmission module may select different target transmission frequencies based on different performance requirements, and may meet requirements in different scenarios.
Therefore, the value range of the target transmission frequency can be 100kHz to 200MHz, the requirements under different scenes can be met, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be in contact with any position on the surface of the biological tissue and is not limited by a specific position, the biological tissue is used as a conductive medium, the conductivity is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the energy receiving module includes a front end receiving unit, a rectifying unit and a voltage stabilizing unit;
the front end receiving unit is used for adjusting the second electric signal to obtain a third electric signal;
the rectifying unit is used for rectifying the third electric signal to obtain a rectified output voltage;
the voltage stabilizing unit is used for outputting direct current voltage based on the rectified output voltage.
Specifically, the energy transmission module may include a power supply unit and a resonant network unit, where the power supply unit may provide a power supply voltage to the resonant network unit, and then the resonant network unit may adjust an output impedance of the energy transmission module based on a target transmission frequency and a target resonance parameter, to obtain a first electrical signal, and then the first electrical signal of the target transmission frequency transmitted by the energy transmission module may perform energy transmission along a forward path;
specifically, the energy receiving module may include a front end receiving unit, a rectifying unit, and a voltage stabilizing unit, and may receive a second electrical signal corresponding to the first electrical signal from the forward path through the front end receiving unit, and adjust the second electrical signal, obtain a third electrical signal, and then may rectify the third electrical signal through the rectifying unit, obtain a rectified output voltage, and then may output a direct current voltage based on the rectified output voltage through the voltage stabilizing unit, and may supply power to the computer interface device.
Therefore, the energy receiving module can process the second electric signal through the front end receiving unit, the rectifying unit and the voltage stabilizing unit to obtain direct-current voltage and supply power to the brain-computer interface device, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be in contact with any position on the surface of the biological tissue and is not limited by a specific position, the biological tissue is used as a conductive medium, the conductivity of the biological tissue is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the front end receiving unit comprises an inductance-capacitance array;
the inductance-capacitance array is used for adjusting target array parameters of the inductance-capacitance array based on the rectification output voltage and outputting the third electric signal to the rectification unit so as to enable the rectification output voltage to be maximum, and the target array parameters are used for representing inductance-capacitance configuration of the inductance-capacitance array.
Specifically, the energy receiving module may include a front end receiving unit, a rectifying unit, and a voltage stabilizing unit, where the front end receiving unit may include an inductance-capacitance array, and the front end receiving unit may receive the second electrical signal through the inductance-capacitance array, and adjust the second electrical signal to obtain a third electrical signal;
the third electric signal can be rectified through the rectifying unit to obtain rectified output voltage, and target array parameters of the inductance and capacitance array can be adjusted through the inductance and capacitance array based on the rectified output voltage to enable the rectified output voltage to be maximum; and then can be based on the rectification output voltage through voltage regulator unit, output direct current voltage can supply power to brain machine interface device.
Optionally, fig. 2 is a second schematic structural diagram of the wireless power supply device provided by the present invention, and as shown in fig. 2, the device includes an energy transmitting module and an energy receiving module, the energy transmitting module includes a power supply unit and a resonant network unit, the energy receiving module includes a front end receiving unit, a rectifying unit and a voltage stabilizing unit, and the front end receiving unit includes an inductor capacitor array.
As shown in fig. 2, a forward path is formed between the first electrode of the energy transmission module and the third electrode of the energy reception module, and a reverse path is formed between the second electrode of the energy transmission module and the fourth electrode of the energy reception module.
As shown in fig. 2, the resonant network unit may adjust an output impedance of the energy transmission module based on the target transmission frequency and the target resonance parameter, obtain the first electrical signal, and then may transmit the first electrical signal to the surface of the biological tissue through the first electrode.
As shown in fig. 2, the front-end receiving unit may adjust the second electrical signal to obtain a third electrical signal, the rectifying unit may rectify the third electrical signal to obtain a rectified output voltage, and the voltage stabilizing unit may output a dc voltage to power the computer interface device based on the rectified output voltage.
It can be understood that, the energy receiving module can dynamically adjust the target array parameters of the inductance-capacitance array according to the rectified output voltage of the rectifying unit based on a closed-loop control strategy, so that the rectified output voltage can be maximized, the maximum effective energy receiving can be realized, and the wireless energy transmission efficiency can be improved.
Therefore, the rectified output voltage can be improved through the inductance-capacitance array, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be in contact with any position on the surface of the biological tissue and is not limited by a specific position, the biological tissue is used as a conductive medium, the conductivity of the biological tissue is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the energy transmission module comprises a first wireless communication module, and the energy reception module comprises a second wireless communication module;
the first wireless communication module is configured to receive the rectified output voltage from the second wireless communication module;
the second wireless communication module is used for sending the rectified output voltage to the first wireless communication module;
the resonant network unit is configured to adjust the target transmission frequency based on a fixed target resonance parameter, the transmission power of the energy transmission module, and the rectified output voltage to maximize the rectified output voltage.
Specifically, the energy transmitting module may include a power supply unit, a resonant network unit, and a first wireless communication module, where the power supply unit may provide a power supply voltage to the resonant network unit, and then the resonant network unit may adjust an output impedance of the energy transmitting module based on a target transmission frequency and a target resonance parameter, to obtain a first electrical signal, and then the first electrical signal of the target transmission frequency transmitted by the energy transmitting module may perform energy transmission along a forward path;
specifically, the energy receiving module may include a front end receiving unit, a rectifying unit, a voltage stabilizing unit, and a second wireless communication module, the front end receiving unit may receive a second electrical signal corresponding to the first electrical signal from a forward path, and may adjust the second electrical signal to obtain a third electrical signal, and then the rectifying unit may rectify the third electrical signal to obtain a rectified output voltage, and the resonant network unit may adjust the target transmission frequency based on the fixed target resonance parameter, the transmission power of the energy transmitting module, and the rectified output voltage to maximize the rectified output voltage;
and then can be based on the rectification output voltage through voltage regulator unit, output direct current voltage can supply power to brain machine interface device.
It can be understood that on the basis of miniaturization of the electrodes, by adjusting circuit parameters in real time, the energy transmission efficiency can be improved, and stable direct-current voltage can be provided for the computer interface device.
Therefore, the rectified output voltage can be improved through the resonant network unit, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be in contact with any position on the surface of the biological tissue and is not limited by a specific position, the biological tissue is used as a conductive medium, the conductivity of the biological tissue is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, the energy receiving module further comprises: a battery cell;
the voltage stabilizing unit is also used for outputting direct-current voltage to charge the battery unit;
the battery unit is used for supplying power to the brain-computer interface equipment.
Specifically, the direct-current voltage output by the voltage stabilizing unit can directly supply power to the computer interface equipment, and can also supply power to a miniaturized rechargeable battery firstly and then supply power to the computer interface equipment through the rechargeable battery.
Therefore, the energy receiving module can store and receive electric energy through the battery unit and supply power to the brain-computer interface device through the battery unit, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be in contact with any position on the surface of the biological tissue and is not limited by a specific position, the biological tissue is used as a conductive medium, the conductivity is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
Optionally, fig. 3 is a schematic diagram of a debugging process of the wireless power supply apparatus provided by the present invention, and as shown in fig. 3, the debugging process of the wireless power supply apparatus may include steps 301 to 307:
alternatively, the electrodes of the energy transmission module may use a conductive material, wherein the first electrode is connected in contact with the surface of the biological tissue of the animal body, and the ground electrode (second electrode) of the energy transmission module does not contact the animal body; the third electrode of the energy receiving module can be made of a biocompatible and conductive material and directly contacts with biological tissues, and the ground electrode (fourth electrode) of the energy receiving module can be electrically connected with the conductive layer of the brain-computer interface device, and the conductive layer is not directly contacted with the biological tissues and is isolated by the covered insulating layer.
alternatively, after the electrodes of the energy transmission module and the electrodes of the energy reception module are configured, a vector network analyzer may be used, two ports of which are respectively connected to the first electrode of the energy transmission module and the third electrode of the energy reception module through a balun, and a scattering parameter (S parameter) of a dual port in a frequency band of 100kHz to 200MHz is measured. And introducing electromagnetic simulation software to obtain two-port impedance parameters, performing full-band dual-port impedance simulation, obtaining an optimal frequency point, namely fixed target transmission frequency, under the condition of full matching of the two ports, and taking the frequency point as the transmission frequency.
304, the resonant network unit adjusts the target resonance parameter based on the fixed target transmission frequency and the impedance parameter corresponding to the first electrode;
305, acquiring a rectified output voltage in real time by an inductance-capacitance array;
in step 307, the voltage stabilizing unit outputs a dc voltage based on the rectified output voltage.
According to the wireless power supply device provided by the invention, a closed circuit loop for energy transmission can be formed through a forward path between the first electrode and the third electrode and a reverse path between the second electrode and the fourth electrode, a first electric signal of a target transmission frequency can be transmitted along the forward path, the energy receiving module can receive a second electric signal from the forward path, the energy transmitting module and the energy receiving module do not need coils or antennas, the size can be miniaturized, the first electrode can be contacted with any position on the surface of biological tissue, the limitation of a specific position can be avoided, the biological tissue is used as a conductive medium, the conductivity is higher than that of an air medium, the energy loss can be reduced, and the transmission distance can be increased.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A wireless power supply apparatus, comprising: the energy transmission module comprises a first electrode and a second electrode, and the energy receiving module comprises a third electrode and a fourth electrode;
the energy transmitting module is used for transmitting a first electric signal to the surface of the biological tissue through the first electrode, and the frequency of the first electric signal is a target transmission frequency;
the energy receiving module is used for receiving a second electric signal corresponding to the first electric signal from biological tissues through the third electrode, converting the second electric signal into direct-current voltage and outputting the direct-current voltage to the brain-computer interface equipment;
the first electrode is in contact connection with the biological tissue surface, and the second electrode is not in connection with the biological tissue; the third electrode is in contact connection with the biological tissue; the fourth electrode is not connected to the biological tissue;
the energy sending module comprises a power supply unit and a resonant network unit;
the resonant network unit is used for adjusting the output impedance of the energy sending module based on the target transmission frequency and the target resonance parameter to obtain the first electric signal;
wherein the target resonance parameter is used to characterize an inductance-capacitance configuration of the resonant network element;
the resonant network unit is further configured to adjust the target resonant parameter based on a fixed target transmission frequency and an impedance parameter corresponding to the first electrode, so that the first electrode is in an impedance matching state;
the fixed target transmission frequency is determined by performing target frequency band double-port impedance simulation based on measured scattering parameters between a first port and a second port, the target frequency band is 100kHz to 200MHz, the first port is a port between the first electrode and the second electrode, and the second port is a port between the third electrode and the fourth electrode;
the resonant network unit is further used for adjusting the target transmission frequency based on a fixed target resonance parameter and the transmission power of the energy transmission module so as to maximize the transmission power of the energy transmission module;
the energy receiving module comprises a front end receiving unit, a rectifying unit and a voltage stabilizing unit;
the front end receiving unit is used for adjusting the second electric signal to obtain a third electric signal;
the rectifying unit is used for rectifying the third electric signal to obtain a rectified output voltage;
the voltage stabilizing unit is used for outputting direct-current voltage based on the rectified output voltage;
the front end receiving unit comprises an inductance-capacitance array;
the inductance-capacitance array is used for adjusting target array parameters of the inductance-capacitance array based on the rectification output voltage and outputting the third electric signal to the rectification unit so as to enable the rectification output voltage to be maximum, and the target array parameters are used for representing inductance-capacitance configuration of the inductance-capacitance array.
2. The wireless power supply apparatus of claim 1, wherein the target transmission frequency is in a range of 100kHz to 200 MHz.
3. The wireless power supply apparatus according to claim 1, wherein the energy transmission module includes a first wireless communication module, and the energy reception module includes a second wireless communication module;
the first wireless communication module is configured to receive the rectified output voltage from the second wireless communication module;
the second wireless communication module is used for sending the rectified output voltage to the first wireless communication module;
the resonant network unit is configured to adjust the target transmission frequency based on a fixed target resonance parameter, the transmission power of the energy transmission module, and the rectified output voltage to maximize the rectified output voltage.
4. The wirelessly powered device of claim 1, wherein the energy receiving module further comprises: a battery cell;
the voltage stabilizing unit is also used for outputting direct-current voltage to charge the battery unit;
the battery unit is used for supplying power to the brain-computer interface equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210659722.2A CN114759689B (en) | 2022-06-13 | 2022-06-13 | Wireless power supply device |
| PCT/CN2023/096169 WO2023241330A1 (en) | 2022-06-13 | 2023-05-25 | Wireless power supply apparatus |
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| CN202210659722.2A CN114759689B (en) | 2022-06-13 | 2022-06-13 | Wireless power supply device |
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| CN103501059A (en) * | 2013-09-27 | 2014-01-08 | 重庆大学 | Electric field coupling type parallel wireless transmission system for energy signals |
| JP2014017927A (en) * | 2012-07-06 | 2014-01-30 | Toshiba Digital Media Engineering Corp | Power transmission device, power reception device, power transmission method and power reception method |
| CN111726143A (en) * | 2019-03-18 | 2020-09-29 | 清华大学 | Wireless body area network communication system |
| CN112022101A (en) * | 2020-09-23 | 2020-12-04 | 中国科学院自动化研究所 | Implanted brain-computer interface based on human body medium information and energy transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2806532B1 (en) * | 2012-01-18 | 2020-06-17 | Furukawa Electric Co., Ltd. | Wireless power transmission system, power transmission device, and power reception device |
| JP5975555B1 (en) * | 2015-12-08 | 2016-08-23 | 株式会社ｅＮＦＣ | Transmission system, transmission apparatus, and transmission method |
| CN110943547A (en) * | 2019-12-17 | 2020-03-31 | 华南理工大学 | Electric field coupling wireless power transmission system for parallel autonomous fractional order circuit |
| CN114759689B (en) * | 2022-06-13 | 2022-09-27 | 中国科学院自动化研究所 | Wireless power supply device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014017927A (en) * | 2012-07-06 | 2014-01-30 | Toshiba Digital Media Engineering Corp | Power transmission device, power reception device, power transmission method and power reception method |
| CN103501059A (en) * | 2013-09-27 | 2014-01-08 | 重庆大学 | Electric field coupling type parallel wireless transmission system for energy signals |
| CN111726143A (en) * | 2019-03-18 | 2020-09-29 | 清华大学 | Wireless body area network communication system |
| CN112022101A (en) * | 2020-09-23 | 2020-12-04 | 中国科学院自动化研究所 | Implanted brain-computer interface based on human body medium information and energy transmission |
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| CN114759689A (en) | 2022-07-15 |
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