A wireless signal energy co-transmission system and method based on different frequency direction backtracking

Abstract

The application belongs to the technical field of wireless energy transmission and wireless communication synchronous transmission, and discloses a wireless signal and energy synchronous transmission system and method based on different frequency direction backtracking, which comprises an electromagnetic energy and information receiving end and an electromagnetic energy and information transmitting end.The transceiving different frequency direction backtracking method disclosed by the application has the advantages of fast response, adaptive tracking, anti-multipath and multi-frequency interference.The backtracking circuit adopts a pure analog mode to realize the backtracking function, can realize directional back transmission of energy and information without extracting target position information, and due to the digital signal processing process without position information extraction, the system has fast response speed and can adaptively track the target in fast motion.The system can effectively resist the interference of multipath signals on target positioning.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wireless energy transmission and wireless communication synchronous transmission, and particularly relates to a wireless signal and energy synchronous transmission system and method based on different frequency direction backtracking. BACKGROUND

[0002] With the development of Internet of Things technology, a large number of wireless sensing and Internet of Things networks are widely built and applied, the use amount of sensors and small electronic devices is greatly improved, and at the same time, with the complication of application environment, the traditional complex wired power supply has appeared to be insufficient to meet the use demand, and a large number of sensor and electronic device power supply needs to develop towards wireless and intelligent, electromagnetic energy as a green, controllable and sustainable energy provides a selectable solution for solving this problem. At the same time, the demand for information transmission in Internet of Things technology cannot be ignored, electromagnetic wave as an excellent energy and information carrier, the technology of using microwave for wireless energy and wireless information transmission has been widely researched and developed.

[0003] In the process of signal and energy transmission, how to accurately locate the target and transmit enough power energy and information is a difficult problem to be solved. In the traditional way of positioning the target first by a wireless positioning subsystem, and then transmitting energy by controlling the beam direction of a phased array, multipath reflection and high-power energy transmission signals interfere with the wireless positioning subsystem and are difficult to handle, and due to the need for digital signal processing part, the response speed is limited, and it is difficult to cope with the signal and energy transmission of high-speed moving targets. Direction backtracking has the advantage of realizing adaptive tracking backtracking by pure analog mode, and can be well applied to the working environment of wireless energy transmission system. Some existing wireless energy transmission systems based on direction backtracking reported, such as the patent "Wireless energy transmission system and method based on direction backtracking antenna" (Patent No. CN201810656679.8) applied by Xi'an University of Electronic Science and Technology, all use the same or similar transmit and receive frequency. Such architecture is easy to design and reuse the transceiver antenna array, but has the defects of insufficient transmit and receive isolation and insufficient transmit energy, and most of them are only simple wireless energy transmission, and do not fully utilize the characteristics of the system architecture. On the basis of the original wireless energy transmission system, the wireless information transmission is organically combined to realize the common transmission of energy and information.

[0004] Through the above analysis, the problems and defects of the prior art are:

[0005] The existing wireless energy transmission system based on direction backtracking adopts the same or similar transmitting and receiving frequency, such a structure is easy to design and multiplex the transmitting and receiving antenna array, but has the defects of insufficient transmitting and receiving isolation and insufficient transmitting energy, and only transmits wireless energy, and does not fully utilize the characteristics of the system structure, and organically combines wireless information transmission based on the original wireless energy transmission system to realize the common transmission of energy and information. SUMMARY

[0006] In view of the problems in the prior art, the application provides a wireless energy and information co-transmission system and method based on different frequency direction backtracking.

[0007] The application is implemented as follows: a wireless energy and information co-transmission system based on different frequency direction backtracking comprises:

[0008] An electromagnetic energy and information receiving end and an electromagnetic energy and information transmitting end;

[0009] The electromagnetic energy and information receiving end comprises a guiding and receiving common-aperture antenna, a guiding signal radio frequency source, a power divider, an information demodulation module and a rectification energy storage module; the guiding and receiving common-aperture antenna is connected with the guiding signal radio frequency source and the power divider, and the power divider is connected with the information demodulation module and the rectification energy storage module respectively.

[0010] The guiding and receiving common-aperture antenna comprises a guiding frequency transmitting antenna and an energy and information co-transmission frequency receiving antenna, which are respectively used for transmitting electromagnetic waves of the guiding frequency and receiving electromagnetic waves of the energy and information co-transmission frequency; the polarization modes of the guiding and receiving common-aperture antenna are orthogonal; and the guiding signal and the energy and information co-transmission signal are narrowband signals without harmonic relationship in frequency.

[0011] Further, the guiding signal radio frequency source is a microwave source, which is used for generating continuous waves of the guiding signal frequency.

[0012] The power divider is a coupler or a power divider, which is used for dividing the energy and information co-transmission electromagnetic signals with different powers to be used for information demodulation and energy rectification respectively.

[0013] The information demodulation module comprises a down-mixer and a demodulator, which are used for demodulating the energy and information co-transmission information.

[0014] The rectification energy storage module comprises a rectification circuit and a battery connected in sequence, and the rectification circuit is composed of a rectification diode and a matching circuit thereof.

[0015] Further, the electromagnetic energy and information transmitting end comprises a different frequency common-aperture transmitting and receiving antenna array, a different frequency direction backtracking circuit and a guiding signal monitoring module.

[0016] Further, the hetero-frequency co-boresight transmitting antenna array comprises a guiding frequency receiving antenna array and a signal energy co-transmitting frequency transmitting antenna array, both of which have the same number of units, the same phase centers and the same ratio of unit spacing to wavelength;

[0017] The hetero-frequency direction backtracking circuit comprises a receiving down-mixing module, a signal loading and transmitting up-mixing module and a direct current power supply module.

[0018] Further, the receiving down-mixing module comprises a filter circuit, a low-noise amplifier and a down-mixer, which is used for down-mixing the guiding signal to an intermediate frequency for information loading; the signal loading and transmitting up-mixing module comprises an amplitude control circuit, a modulated signal generating circuit, an up-mixer, a filter circuit, a phase compensation circuit and a power amplification circuit.

[0019] The up-mixers and down-mixers in all channels share the same local oscillator input, i.e., the local oscillator input signals of the up-mixers and down-mixers in all channels are generated by the same signal source and are divided by a power divider to each channel, so as to ensure that the phase shift amount introduced by the local oscillator of the mixer to each channel is the same.

[0020] The intermediate frequency input frequency of one of the down-mixer and the up-mixer in each channel is higher than the radio frequency input frequency, and the intermediate frequency input frequency of the other mixer is lower than the radio frequency input frequency.

[0021] The amplitude control circuit comprises a gain-controlled amplification circuit and a control voltage forming circuit, and the automatic control circuit gain realizes stable power output.

[0022] The modulated signal generating circuit adopts a phase shift keying (PSK) mode.

[0023] The phase compensation circuit is a phase shifter with a phase shift amount adjustable range of 0°-360°.

[0024] The direct current power supply module is connected with 220V mains and is connected with the guiding signal monitoring module through an electrically controlled switch.

[0025] Further, the guiding signal monitoring module comprises a detecting antenna and a detector, and the power of the guiding signal is used to determine whether to open or close the direct current power supply of the electromagnetic energy and information transmitting end.

[0026] Another object of the present application is to provide a wireless signal energy co-transmitting method based on hetero-frequency direction backtracking, which comprises the following steps:

[0027] Step 1, when the battery power in the electromagnetic energy and information receiving end is lower than a set threshold, a guiding signal S1 with a frequency f1 is generated by a guiding signal radio frequency source and is transmitted through a guiding antenna.

[0028] Step 2, the signal S1 is received by the electromagnetic energy and information transmitting end through space propagation, and the guiding signal monitoring module judges according to the received power, if it is lower than the set threshold, the direct current power supply of the heterodyne direction backtracking circuit is closed, if it is higher than the set threshold, the direct current power supply of the heterodyne direction backtracking circuit is opened;

[0029] Step 3, the signal S1 received by the guiding frequency receiving antenna array is sent to the heterodyne direction backtracking circuit, and after filtering other interference signals in space through a filter, the signal S2 is obtained;

[0030] Step 4, the signal S2 is amplified in power through a low noise amplifier, and then is down-mixed through a mixer with a local oscillation signal frequency f2, and after filtering spurious signals through a filter, the intermediate frequency signal S3 with a frequency f3 is obtained;

[0031] Step 5, the signal S3 is input into a gain-controlled amplification circuit to amplify power, and the intermediate frequency signal S4 with stable power is output;

[0032] Step 6, the signal S4 is input into a mixer with a local oscillation signal being a phase modulation signal with a frequency f4 to perform up-mixing, and after filtering spurious signals through a filter, the modulation signal S5 with a frequency f5 is obtained;

[0033] Step 7, the signal S5 is phase-compensated through a phase shifter, different phase compensation amounts are compensated for each channel to keep the phase compensation amounts consistent, and after power amplification through a multi-stage amplifier, the modulation signal S6 with a large power and a frequency f5 is output;

[0034] Step 8, the signal S6 is input into a signal-energy co-transmission frequency transmitting antenna of the electromagnetic energy and information transmitting end to be converted into electromagnetic waves and forwarded to the direction of the incident guiding signal adaptively;

[0035] Step 9, the signal S6 is received by a signal-energy co-transmission frequency receiving antenna of the electromagnetic energy and information receiving end through space propagation, and after filtering other interference signals in space through a filter, the signal is input into a power divider and is divided into two signals s7 and s8;

[0036] Step 10, the signal S7 is input into an information demodulation module to demodulate the carried information;

[0037] Step 11, the signal S8 is input into a rectification energy storage circuit, is converted into direct current, and after filtering fundamental wave and high harmonic components through a filter, is stored into a battery.

[0038] Another purpose of the present application is to provide a computer device comprising a memory and a processor, the memory stores a computer program, when the computer program is executed by the processor, the processor executes the steps of the wireless signal-energy co-transmission method based on heterodyne direction backtracking.

[0039] Another object of the present application is to provide a computer readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the wireless signal and energy co-transmission method based on the direction backtracking of different frequencies.

[0040] Another object of the present application is to provide an information data processing terminal for implementing the wireless signal and energy co-transmission system based on the direction backtracking of different frequencies.

[0041] In combination with the above technical solutions and the technical problems solved, the technical solution to be protected by the present application has the following advantages and positive effects:

[0042] Firstly, compared with the traditional technical solution, the direction backtracking method for receiving and transmitting different frequencies disclosed in the present application has the advantages of fast response, adaptive tracking, anti-multipath and multi-frequency interference. The backtracking circuit realizes the function of backtracking in a pure analog mode, can perform directional return of energy and information without extracting target position information, and due to the digital signal processing process without position information extraction, the system response speed is fast, and the target in fast motion can be adaptively tracked. And because in a fixed use scenario, the signal propagation path is fixed, the multipath incoming waves that have been reflected for several times to reach the power supply end will return to the power consumption end along the propagation path, which can effectively resist the interference of multipath signals on target positioning, and because different frequencies are used for receiving and transmitting, different frequency interference signals cannot trigger the same frequency signal energy co-transmission signal, and it is difficult to interfere with the system.

[0043] Compared with the traditional wireless energy transmission system based on direction backtracking, the wireless signal and energy co-transmission system based on the direction backtracking of different frequencies disclosed in the present application realizes higher receiving and transmitting isolation through the proposed system architecture using different receiving and transmitting frequencies without harmonic relationship, polarization orthogonal receiving and transmitting antennas, and twice frequency mixing with multiple high selectivity filters, further improves the upper limit of the system transmission power, and makes the system transmit more energy compared with the traditional design scheme.

[0044] The wireless signal and energy co-transmission system and method based on the direction backtracking of different frequencies disclosed in the present application fully utilizes the frequency mixer originally needed in the power supply end for realizing phase conjugation, increases the signal transmission function by replacing the local oscillator signal source of the frequency mixer, fully develops and utilizes the circuit structure of the energy transmission system based on the direction backtracking of different frequencies, realizes the increase of new functions without adding additional components, and realizes the synchronous transmission of information and energy.

[0045] Second, the wireless energy and data transmission system based on the heterodyne direction backtracking provided by the present application exhibits innovative design, aiming to solve the problem of low efficiency of wireless energy transmission and data transmission in the prior art, and significantly improve the reliability and multifunctionality of the system. The technical problems solved by the present application and the significant technical progress obtained are described in detail as follows:

[0046] Technical problems solved by the prior art:

[0047] 1. Efficiency problem of wireless energy and data transmission: In traditional wireless energy transmission systems, energy and data are usually transmitted at the same frequency, which limits the transmission efficiency and distance, because the optimal frequency for energy transmission and the optimal frequency for data transmission are often different.

[0048] 2. Signal interference problem: When energy and data are transmitted using the same or similar frequency, interference between signals is likely to occur, affecting the accuracy of data transmission and the effective transmission of energy.

[0049] 3. System flexibility and adaptability problem: Traditional systems lack flexibility in design, making it difficult to optimize performance according to specific application scenarios, especially in applications that require simultaneous transmission of data and energy.

[0050] Significant technical progress obtained:

[0051] 1. Improve transmission efficiency: By using a guide and receiving co-boresight antenna, data and energy are transmitted simultaneously at different frequencies, significantly improving the efficiency of wireless transmission. The design of the guide frequency transmitting antenna and the signal energy transmission frequency receiving antenna allows energy and data to be transmitted at their optimal frequencies, reducing energy loss and data error rate.

[0052] 2. Reduce signal interference: The present application effectively avoids interference between guide signals and signal energy transmission signals by using orthogonal polarization and narrowband signal design with no harmonic relationship between frequencies, ensuring clear transmission of signals and efficient reception of energy.

[0053] 3. Enhance the multifunctionality and reliability of the system: The system design that integrates guide signals and signal energy transmission technology not only improves the performance of energy and data transmission, but also enhances the stability and reliability of the system in complex environments through the use of orthogonal polarization and frequency separation technology.

[0054] 4. Improve the flexibility and adaptability of the system: The system design of the present application allows flexible adjustment of frequency and polarization according to application requirements, enabling the system to adapt to different operating conditions and application scenarios, thereby achieving optimal performance in different practical applications.

[0055] The present application has made significant technical progress in improving the transmission efficiency of the wireless signal energy transmission system, reducing signal interference, enhancing the versatility, reliability and flexibility of the system, and solving many technical problems existing in the prior art. These innovations make the present application have important practical value in the field of wireless energy transmission and data communication.

[0056] Third, as the creative evidence of the claims of the present application, it is also embodied in the following important aspects:

[0057] (1) The expected income and commercial value of the technical scheme of the present application after transformation are:

[0058] The technical scheme of the present application can solve the problem of power supply and information collection of various small electronic devices in outdoor and indoor unmanned scenes after transformation, without the need for complex wired network construction and manpower to replace batteries, which can simplify the power supply process of small electronic devices, and at the same time has the function of information transmission, greatly reducing the hardware cost of early equipment wiring and the labor cost of later maintenance.

[0059] (2) The technical scheme of the present application solves the technical problems that people have been eager to solve but have failed to succeed:

[0060] The technical scheme of the present application solves the problem of power supply and communication of small electronic devices in specific environments, such as environmental information sensors in outdoor and unmanned scenes, which are difficult to build wired cables and do not have the implementation conditions to convert wind energy, solar energy, etc. into electric energy, and overcomes the technical difficulty of building a sustainable wireless sensor network.

[0061] (3) The technical scheme of the present application overcomes technical bias:

[0062] The technical scheme of the present application overcomes the technical difficulties of high transceiver isolation requirement and channel consistency maintenance in the direction backtracking system, solves the technical bias that the traditional direction backtracking system cannot perform high-power microwave energy transmission, and innovatively realizes the simultaneous transmission of far-field high-power microwave energy and information using the direction backtracking method, fully utilizing the advantages of self-tracking and fast response of the direction backtracking system. BRIEF DESCRIPTION OF DRAWINGS

[0063] Figure 1 is the structure block diagram of the wireless signal energy transmission system based on the heterodyne direction backtracking provided by the embodiment of the present application.

[0064] Figure 2 is the backtracking function principle schematic diagram of the heterodyne direction backtracking provided by the embodiment of the present application.

[0065] Figure 3The embodiment of the present application provides a top layout structure diagram of a co-caliber transmitting and receiving antenna in an electromagnetic energy and information transmitting end in a wireless signal energy simultaneous transmission system based on a different frequency direction backtracking.

[0066] Figure 4 The embodiment of the present application provides a basic structure diagram of a wireless signal energy simultaneous transmission system based on a different frequency direction backtracking.

[0067] Figure 5 The embodiment of the present application provides a structure diagram of an electromagnetic energy and information receiving end in a wireless signal energy simultaneous transmission system based on a different frequency direction backtracking.

[0068] Figure 6 The embodiment of the present application provides a structure diagram of an electromagnetic energy and information transmitting end in a wireless signal energy simultaneous transmission system based on a different frequency direction backtracking.

[0069] Figure 7 The embodiment of the present application provides a flow chart of a wireless signal energy simultaneous transmission method based on a different frequency direction backtracking.

[0070] Figure 8 The embodiment of the present application provides a test effect diagram under a scenario that a transmitting end and a receiving end are 5 meters apart.

[0071] Figure 9 The embodiment of the present application provides a test result effect diagram.

[0072] Figure 1 The embodiment of the present application provides a test result effect diagram. Specific embodiments

[0073] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is further described in detail below with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0074] As shown in Figure 1 The embodiment of the present application provides a wireless signal energy simultaneous transmission system based on a different frequency direction backtracking, which comprises:

[0075] An electromagnetic energy and information receiving end 1 and an electromagnetic energy and information transmitting end 2.

[0076] The electromagnetic energy and information receiving end 1 comprises a co-caliber antenna for guiding and receiving, a guided signal radio frequency source, a power distributor, an information demodulation module and a rectification energy storage module; the co-caliber antenna for guiding and receiving is connected with the guided signal radio frequency source and the power distributor; the power distributor is connected with the information demodulation module and the rectification energy storage module respectively.

[0077] The guiding and receiving co-antenna comprises a guiding frequency transmitting antenna and a signal energy co-transmitting frequency receiving antenna, which are respectively used for transmitting electromagnetic waves of guiding frequency and receiving electromagnetic waves of signal energy co-transmitting frequency, polarizations of the guiding and receiving antennas are orthogonal, and the guiding signal and the signal energy co-transmitting signal are narrowband signals without harmonic relationship in frequency.

[0078] The working principle of the wireless signal energy co-transmitting system based on the different frequency direction backtracking provided by the embodiment of the application is as follows:

[0079] 1. Guiding signal and different frequency direction backtracking:

[0080] In the electromagnetic energy and information receiving end 1, the guiding frequency transmitting antenna in the guiding and co-antenna receiving antenna is responsible for generating and transmitting electromagnetic waves of guiding frequency. This guiding signal is a narrowband signal, which is used to guide the directional transmission of the electromagnetic energy and information transmitting end 2.

[0081] After the electromagnetic energy and information transmitting end 2 receives the guiding signal, through the different frequency direction backtracking technology, without calculating the target position, the transmitting beam can be adaptively pointed to the direction of the guiding electromagnetic wave through the transmission of the signal phase. The different frequency direction backtracking technology is developed on the basis of the traditional direction backtracking technology, and its characteristic is that the frequency of the received guiding signal is different from the frequency of the transmitted signal.

[0082] The electromagnetic energy and information transmitting end 2 directs the electromagnetic energy and signal energy co-transmitting signal to the electromagnetic energy and information receiving end 1 according to the phase of the received guiding signal.

[0083] 2. Reception and processing of signal energy co-transmitting signal:

[0084] In the electromagnetic energy and information receiving end 1, the signal energy co-transmitting frequency receiving antenna is responsible for receiving electromagnetic waves of signal energy co-transmitting frequency. This electromagnetic wave contains both energy information and data information.

[0085] The received electromagnetic wave signal is power-divided by a power divider. Part of the signal enters an information demodulation module to demodulate and restore the data; another part of the signal enters a rectification energy storage module to convert the energy in the electromagnetic wave into electrical energy and store it.

[0086] 3. Orthogonal polarization mode:

[0087] The polarization modes of the guiding frequency transmitting antenna and the signal energy co-transmitting frequency receiving antenna in the guiding and receiving co-antenna are orthogonal. This design can ensure that the guiding signal and the signal energy co-transmitting signal do not interfere with each other during transmission, and improve the stability and reliability of the system.

[0088] 4. Frequency without harmonic relationship:

[0089] The guide signal and the signal energy are narrow-band signals without harmonic relationship in frequency.

[0090] Through the working principle, the wireless signal energy co-transmission system based on the different frequency direction backtracking can realize efficient transmission of electromagnetic energy and reliable transmission of information, and ensure stability and reliability of the signal in the transmission process.

[0091] The guide signal radio frequency source is a microwave source for generating continuous wave of the guide signal frequency.

[0092] The power divider is a coupler or a power divider for distributing different power signal energy co-transmission electromagnetic signals for information demodulation and energy rectification.

[0093] The information demodulation module comprises a down-mixer and a demodulator for demodulating the signal energy co-transmission information.

[0094] The rectification energy storage module comprises a rectifier circuit and a battery connected in series, and the rectifier circuit is composed of a rectifier diode and a matching circuit thereof.

[0095] The electromagnetic energy and information transmitting end 2 comprises a different frequency common aperture transmitting-receiving antenna array, a different frequency direction backtracking circuit and a guide signal monitoring module.

[0096] The different frequency common aperture transmitting-receiving antenna array comprises a guide frequency receiving antenna array and a signal energy co-transmission frequency transmitting antenna array, the number of units of the two is the same, the phase centers coincide and the ratio of the unit spacing to the wavelength is the same.

[0097] The different frequency direction backtracking circuit comprises a receiving down-mixer module, a signal loading and transmitting up-mixer module and a direct current power supply module.

[0098] The receiving down-mixer module comprises a filter circuit, a low-noise amplifier and a down-mixer for down-mixing the guide signal to an intermediate frequency for information loading.

[0099] The signal loading and transmitting up-mixer module comprises an amplitude control circuit, a modulated signal generating circuit, an up-mixer, a filter circuit, a phase compensation circuit and a power amplification circuit.

[0100] The intermediate frequency input frequency of one of the mixers in the downmixer and the upmixer of each channel is higher than the radio frequency input frequency, and the intermediate frequency input frequency of the other mixer is lower than the radio frequency input frequency;

[0101] The amplitude control circuit comprises a gain-controlled amplification circuit and a control voltage forming circuit, and the automatic control circuit gain is controlled to realize stable power output;

[0102] The modulation signal generating circuit adopts a phase modulation (PSK) mode;

[0103] The phase compensation circuit is a phase shifter with a phase adjustment range of 0°-360°.

[0104] The direct current power supply module is connected with 220V mains, and is connected with the guide signal monitoring module through an electrically controlled switch.

[0105] The guide signal monitoring module provided by the embodiment of the present application comprises a detection antenna and a detector, and the power of the guide signal is used to determine whether to turn on or off the direct current power supply of the electromagnetic energy and information transmitting end 2.

[0106] As shown in Figure 7 The wireless signal and energy co-transmission method based on the hetero-frequency direction backtracking provided by the embodiment of the present application comprises:

[0107] Step 1, when the battery power in the electromagnetic energy and information receiving end 1 is lower than a set threshold value, a guide signal S1 with a frequency of f1 is generated by a guide signal radio frequency source and is transmitted through a guide antenna;

[0108] Step 2, the signal S1 is received by the electromagnetic energy and information transmitting end 2 after space propagation, and the guide signal monitoring module determines whether to turn off the direct current power supply of the hetero-frequency direction backtracking circuit or to turn on the direct current power supply of the hetero-frequency direction backtracking circuit according to the received power;

[0109] Step 3, the signal S1 received by the guide frequency receiving antenna array is sent to the hetero-frequency direction backtracking circuit, and after filtering other interference signals in the space through a filter, a signal S2 is obtained;

[0110] Step 4, the signal S2 is amplified in power through a low noise amplifier, and then is down-mixed through a local oscillator signal frequency mixer with a frequency of f2, and after filtering spurious signals through a filter, an intermediate frequency signal S3 with a frequency of f3 is obtained;

[0111] Step 5, the signal S3 is input into a gain-controlled amplification circuit for power amplification, and an intermediate frequency signal S4 with stable power is output;

[0112] Step 6, the signal S4 is input into a frequency mixer of a local signal which is a phase modulation signal with a frequency of f4 to perform up-mixing, and a modulation signal S5 with a frequency of f5 is obtained after filtering out the spurious signal through a filter;

[0113] Step 7, the signal S5 is input into a phase shifter to perform phase compensation, different phase compensation amounts are compensated for each channel to keep the phase compensation amounts consistent, and a modulation signal S6 with a frequency of f5 and a large power is output after power amplification through a multi-stage amplifier;

[0114] Step 8, the signal S6 is input into a signal-energy co-transmission frequency transmitting antenna of the electromagnetic energy and information transmitting end 2 to be converted into an electromagnetic wave and be forwarded to the direction of the guiding signal adaptively;

[0115] Step 9, the signal S6 is received by a signal-energy co-transmission frequency receiving antenna of the electromagnetic energy and information receiving end 1 through space propagation, and after filtering out other interference signals in the space, the signal is input into a power distributor and is divided into two signals S7 and S8;

[0116] Step 10, the signal S7 is input into an information demodulation module to demodulate the carried information;

[0117] Step 11, the signal S8 is input into a rectification energy storage circuit to be converted into a direct current and be stored in a battery after filtering out the fundamental wave and harmonic components through a filter.

[0118] Another object of the present application is to provide a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the computer program is executed by the processor to make the processor execute the steps of the wireless signal-energy co-transmission method based on the different-frequency direction backtracking.

[0119] Another object of the present application is to provide a computer readable storage medium storing a computer program, and the computer program is executed by a processor to make the processor execute the steps of the wireless signal-energy co-transmission method based on the different-frequency direction backtracking.

[0120] Another object of the present application is to provide an information data processing terminal for realizing the wireless signal-energy co-transmission system based on the different-frequency direction backtracking.

[0121] The following will be described in detail through specific embodiments.

[0122] I. Technical principle of the present application

[0123] The proposed signal energy same transmission system is based on the frequency direction backtracking technology, the principle is based on the phase conjugation theory of antenna array theory, that is, the phase difference of each unit corresponding to the receiving and transmitting antennas is opposite, because the direction of transmission is different, the transmitting signal will be returned along the incoming wave direction.

[0124] In the two-dimensional planar antenna array as shown in Figure 2 , the quadrilateral represents the receiving unit, and the circle represents the transmitting unit. The spatial Cartesian coordinate system is established with the receiving unit at the outermost corner as the coordinate origin. All units are included in the first quadrant of the xoy plane. The unit and the corresponding transmitting unit (coordinate position (xs, ys)) are respectively taken as the receiving and transmitting reference units. For the mn receiving antenna unit with coordinate position (xrm, yrn), the receiving frequency is fr, and when it receives the far-field plane wave from the direction, the receiving signal amplitude of each unit is consistent. The phase difference between the mn receiving unit and the reference unit is . After the processing of the proposed direction backtracking circuit, the phase difference of each channel is inverted by a local oscillator frequency higher than the input radio frequency mixer once. The phase shift amount introduced by the remaining devices is compensated to be equal by the phase shifter. At the same time, the phase shift amount introduced by the phase modulation of the signal is also the same at each moment, i.e., the relative value is 0, which does not affect the phase difference between the units. Therefore, when the signal reaches the mn transmitting antenna unit with coordinate (xs+xtm, ys+ytn), the transmitting frequency is ft, and the phase difference with the reference unit is .

[0125] For the antenna unit in the transmitting antenna array, when the transmitting beam is directed to the direction, the phase difference between the mn unit with coordinate (xs+xtm, ys+ytn) and the reference unit is . If the transmitting direction is the same as the incoming direction, i.e., , then there needs to be:

[0126]

[0127] When the phase centers of the receiving and transmitting arrays coincide, if the spacing between the corresponding units of the receiving and transmitting arrays of different frequencies satisfies the inverse proportion to the working frequency, i.e., , then t x tm +β t y tn =β r x rm +β r y rn . Figure 3As shown (taking a uniformly arranged two-dimensional planar array as an example, where rectangles and circles represent receiving and transmitting antenna elements respectively), formula (1) holds true, and the beam pointing of the transceiver array satisfies This means that the waves transmitted by each transmitting antenna element are superimposed in phase with the incident wave in the same direction. Since the phase difference and distance difference between elements are considered, this also applies to arrays with non-uniformly distributed elements. In this case, the array beam points towards the direction of the incoming wave, and there is no need to extract the position information of the direction of the incoming wave, thus enabling adaptive tracking of the transmitted beam with respect to the direction of the incoming wave.

[0128] like Figure 4 As shown, the present invention proposes a wireless signal and energy transmission system based on different frequency directional backtracking, which includes an electromagnetic energy and information receiving end (power consumption end) and an electromagnetic energy and information transmitting end (power supply end).

[0129] The specific structure of the electromagnetic energy and information receiving end is as follows: Figure 5 As shown, the system includes a transceiver antenna, a signal source, a filter, a power divider, a rectifier and energy storage circuit, and an information demodulation circuit. The transceiver antenna consists of a single guided signal transmitting antenna with a common aperture and an array of signal and energy transmission receiving antennas, converting electromagnetic waves into guided waves in space. The signal source provides a guided continuous wave signal for the transmitting antenna. The received signal and energy transmission signal is filtered to remove clutter and then split into two signals of unequal power by the power divider, used for energy transmission and communication respectively. The rectifier and energy storage circuit includes a rectifier circuit and a battery. It uses the nonlinearity of diodes to rectify microwave energy into DC power and store it in the battery. The battery powers the signal source and the information demodulation circuit. The information demodulation circuit downmixes the signal and extracts the information through carrier synchronization, phase detection, and information recovery.

[0130] Figure 6 The proposed electromagnetic energy and information transmitter has the following specific structure: a detection control module, a DC power supply module, a backtracking communication module, and a transceiver antenna. The detection control module includes a detection receiving antenna, a detector, and a control switch, which controls the switching of the DC power supply module based on the input signal. The DC power supply module is connected to a 220V AC mains power supply and is used to power the active devices in the circuit after voltage transformation. The backtracking communication module includes a filter, low-noise amplifier, downmixer, automatic gain control, modulation upmixer, phase compensation, and power amplifier. In the two mixing sections, only one mixer has an intermediate frequency input frequency higher than the radio frequency input frequency, while the other mixer has an intermediate frequency input frequency lower than the radio frequency input frequency, which is used to achieve phase conjugation. The transceiver antenna includes a common-aperture, common-phase-center transceiver antenna array, and the ratio of the spacing between each pair of corresponding receiving and transmitting units is equal to the ratio of the transmitting frequency to the receiving frequency, that is, the ratio of the spacing of each transceiver array to the wavelength is equal.

[0131] Figure 7 The workflow of the proposed wireless signal and energy co-transmission method based on heterodyne direction backtracking.

[0132] Firstly, it is determined whether the battery power in the current electromagnetic energy and information receiving end is lower than the set threshold value. If it is lower than the threshold value, the guiding signal radio frequency source power is turned on to generate a guiding signal S1 with a frequency of f1, which is transmitted through the guiding antenna. If it is not lower than the threshold value, the guiding signal radio frequency source power is not turned on.

[0133] Subsequently, the signal S1 is received by the detection receiving antenna and the backtracking receiving antenna of the electromagnetic energy and information transmitting end after space propagation. The detection receiving antenna receives the guiding signal, which is judged by the detector whether the power is higher than the set threshold value. The direct current power supply of the heterodyne direction backtracking circuit is controlled to control whether the transmitting end works or not. If it is lower than the set threshold value, the direct current power supply of the heterodyne direction backtracking circuit is turned off. If it is higher than the set threshold value, the direct current power supply of the heterodyne direction backtracking circuit is turned on.

[0134] When the direct current power supply of the heterodyne direction backtracking circuit is turned on, the signal S1 received by the backtracking receiving antenna array is sent to the heterodyne direction backtracking circuit for phase conjugation processing, phase modulation, amplification and backtracking transmission. The specific steps are as follows: after filtering out other interference signals in space through the filter, the signal S2 is obtained; the power is amplified through the low-noise amplifier, and then the frequency is down-converted through the local oscillator signal frequency f2 mixer; after filtering out the spurious signal through the filter, the intermediate frequency signal S3 with a frequency of f3 is obtained; the power is amplified through the gain-controlled amplifier circuit, and the intermediate frequency signal S4 with stable power is output; the signal is loaded and up-converted through the local oscillator frequency f4 phase modulation signal mixer, and the modulated signal S5 with a frequency of f5 is obtained after filtering out the spurious signal through the filter; the phase is compensated through the phase shifter, different phase compensation amounts are compensated for each channel to keep the phase shift amounts consistent, and the modulated signal S6 with a large power and a frequency of f5 is output after power amplification through the multi-stage amplifier, and is input into the signal and energy co-transmission frequency transmitting antenna of the electromagnetic energy and information transmitting end, which is converted into electromagnetic waves and is adaptively retransmitted towards the direction of the incident guiding signal.

[0135] Subsequently, the signal and energy co-transmission signal S6 is received by the signal and energy co-transmission frequency receiving antenna of the electromagnetic energy and information receiving end after space propagation, and is input into the power divider after filtering out other interference signals in space through the filter.

[0136] The signal S7 is input into the information demodulation module to demodulate the carried information.

[0137] The signal S8 is input into the rectification energy storage circuit, is converted into direct current, and is stored into the battery after filtering out the fundamental and high harmonic components through the filter.

[0138] It should be noted that embodiments of the present application can be implemented by hardware, software, or a combination of software and hardware. The hardware part can be implemented by using special logic; the software part can be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or a specially designed hardware. Those skilled in the art can understand that the above-mentioned devices and methods can be implemented by using computer executable instructions and / or included in processor control code, for example, such code is provided on a carrier medium, such as a magnetic disk, CD or DVD-ROM, a programmable memory, such as a read-only memory (firmware), or a data carrier, such as an optical or electronic signal carrier. The device of the present application and its modules can be implemented by hardware circuit, such as ultra-large-scale integrated circuit or gate array, semiconductor, such as logic chip, transistor, or programmable hardware device, such as field programmable gate array, programmable logic device, etc., or by software executed by various types of processors, or by a combination of the above-mentioned hardware circuit and software, such as firmware.

[0139] The development of a prototype is carried out in the examples of the present application to verify the principles and part of the functions of the proposed wireless energy and information transmission system based on heterodyne direction backtracking. 3.8 GHz and 5.8 GHz are respectively selected as the frequencies of the guide and energy and information transmission signals. The electromagnetic energy and information receiving end 1 is transmitted by a single antenna with a point frequency signal source, and a 4×4 receiving antenna array is used for energy and information transmission signal reception. A rectifier circuit and an oscilloscope are respectively connected to the receiving end for energy conversion and information reception verification. The electromagnetic energy and information transmitting end 2 uses a single antenna connected to a low-noise amplifier and a detector as a monitor. An 8×8 array antenna is matched with a 64-channel backtracking circuit to realize backtracking energy transmission and communication.

[0140] During the test, the function of backtracking is first tested. In the scenario where the transmitting and receiving ends are 5 meters apart, as shown in Figure 8 , the microwave power intensity received by the electromagnetic energy and information receiving end 1 is tested when it moves in the horizontal plane at different angles. The test results are shown in Figure 9 , which show good adaptive beam directional tracking characteristics and high power reception to convert into direct current signals and communication demodulation.

[0141] The receiving antenna in the electromagnetic energy and information receiving end 1 is connected to a rectifier circuit and an information demodulation module for verification. The direct current power converted by the rectifier module is sufficient to supply the temperature and humidity sensor to work and return the sensing information. The error vector magnitude of the BPSK signal demodulated by the information demodulation module is less than 7.5%.

[0142] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any modification, equivalent replacement and improvement within the technical range disclosed by the present application and within the spirit and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A wireless energy transmission system based on heterodyne direction backtracking, characterized in that, The application relates to a kind of electromagnetic energy and information receiving terminal and electromagnetic energy and information transmitting terminal. The electromagnetic energy and information receiving terminal comprises a guide and receive co-aperture antenna, a guide signal radio frequency source, a power divider, an information demodulation module and a rectification energy storage module; the guide and receive co-aperture antenna is connected with the guide signal radio frequency source and the power divider, and the power divider is connected with the information demodulation module and the rectification energy storage module respectively. The guide and receive co-aperture antenna comprises a guide frequency transmitting antenna and a signal energy co-transmission frequency receiving antenna, which are respectively used for transmitting electromagnetic waves of guide frequency and receiving electromagnetic waves of signal energy co-transmission frequency; the polarization mode of the guide and receive co-aperture antenna is orthogonal, and the guide signal and the signal energy co-transmission signal are narrowband signals without harmonic relationship in frequency. The guide signal radio frequency source is a microwave source, which is used for generating continuous waves of guide signal frequency.

2. The wireless energy transmission system based on the heterodyne direction backtracking of claim 1, wherein, The power divider is a coupler or a power divider, which is used for dividing signal energy co-transmission electromagnetic signals with different powers to be used for information demodulation and energy rectification respectively. The information demodulation module comprises a down-mixer and a demodulator, which are used for demodulating signal energy co-transmission information. The rectification energy storage module comprises a rectification circuit and a battery connected in sequence, and the rectification circuit is composed of rectification diodes and matching circuits thereof. The electromagnetic energy and information transmitting terminal comprises a hetero-frequency co-aperture transmitting-receiving antenna array, a hetero-frequency direction backtracking circuit and a guide signal monitoring module.

3. The wireless energy transmission system based on the heterodyne direction backtracking of claim 1, wherein, The hetero-frequency co-aperture transmitting-receiving antenna array comprises a guide frequency receiving antenna array and a signal energy co-transmission frequency transmitting antenna array, which have the same number of units, the same phase center and the same ratio of unit spacing to wavelength.

4. The wireless energy transmission system based on the heterodyne direction backtracking of claim 3, wherein, The hetero-frequency direction backtracking circuit comprises a receiving down-mixing module, a signal loading and transmitting up-mixing module and a direct current power supply module. The receiving down-mixing module comprises a filter circuit, a low-noise amplifier and a down-mixer, which are used for down-mixing the guide signal to intermediate frequency so as to load information; the signal loading and transmitting up-mixing module comprises an amplitude control circuit, a modulated signal generating circuit, an up-mixer, a filter circuit, a phase compensation circuit and a power amplification circuit.

5. The wireless energy transmission system based on the heterodyne direction backtracking of claim 4, wherein, The up / down mixers in all channels share the same local oscillator input, that is, the local oscillator input signals of the up / down mixers in all channels are generated by the same signal source and are divided to each channel through a power divider, so as to ensure that the phase shift amount introduced by the local oscillator of the mixer to each channel is the same. The intermediate frequency input frequency of only one mixer in the down-mixer and the up-mixer of each channel is higher than the radio frequency input frequency, and the intermediate frequency input frequency of the other mixer is lower than the radio frequency input frequency. The amplitude control circuit comprises a gain-controlled amplification circuit and a control voltage forming circuit, which automatically control the circuit gain to realize stable power output. The modulated signal generating circuit adopts a phase modulation PSK mode. The phase compensation circuit is a phase shifter with a phase shift amount adjustable range of 0-360 degrees. The direct current power supply module is connected with 220V mains, and is connected with the guide signal monitoring module through an electrically controlled switch. The guide signal monitoring module comprises a detection antenna and a detector, which determines whether to open or close the direct current power supply of the electromagnetic energy and information transmitting terminal according to the power of the guide signal.

6. The wireless energy transmission system based on the heterodyne direction backtracking of claim 5, wherein, ​ 7. A method for wireless energy transmission based on the hetero-frequency direction backtracking of the system according to any one of claims 1-6, characterized in that, The wireless signal and energy co-transmission method based on the hetero-frequency direction backtracking comprises the following steps: Step 1, when the battery power in the electromagnetic energy and information receiving end 1 is lower than a set threshold, a guide signal S1 with a frequency f1 is generated by a guide signal radio frequency source and is transmitted through a guide antenna; Step 2, the signal S1 is received by the electromagnetic energy and information transmitting end 2 through space propagation, and a guide signal monitoring module judges according to the received power, if the received power is lower than a set threshold, the direct current power supply of the hetero-frequency direction backtracking circuit is turned off, if the received power is higher than the set threshold, the direct current power supply of the hetero-frequency direction backtracking circuit is turned on; Step 3, the signal S1 received by the guide frequency receiving antenna array is sent to the hetero-frequency direction backtracking circuit, and after filtering other interference signals in the space through a filter, a signal S2 is obtained; Step 4, the signal S2 is amplified in power through a low noise amplifier, and then is down-mixed through a local oscillator signal frequency f2 mixer, and after filtering spurious signals through a filter, an intermediate frequency signal S3 with a frequency f3 is obtained; Step 5, the signal S3 is input into a gain controlled amplification circuit for power amplification, and an intermediate frequency signal S4 with stable output power is output; Step 6, the signal S4 is input into a local oscillator signal frequency f4 phase modulation signal mixer for up-mixing, and after filtering spurious signals through a filter, a modulated signal S5 with a frequency f5 is obtained; Step 7, the signal S5 is phase compensated through a phase shifter, different phase compensation amounts are compensated for each channel to keep the phase shift amounts caused by each channel consistent, and after power amplification through a multi-stage amplifier, a modulated signal S6 with a large power and a frequency f5 is output; Step 8, the signal S6 is input into the signal and energy co-transmission frequency transmitting antenna of the electromagnetic energy and information transmitting end 2, and is converted into an electromagnetic wave and is forwarded to the direction of the guide signal incidence direction adaptively; Step 9, the signal S6 is received by the signal and energy co-transmission frequency receiving antenna of the electromagnetic energy and information receiving end 1 through space propagation, and after filtering other interference signals in the space through a filter, is input into a power distributor and is divided into two signals S7 and S8; Step 10, the signal S7 is input into an information demodulation module, and the carried information is demodulated; Step 11, the signal S8 is input into a rectification energy storage circuit, is converted into a direct current and is stored into a battery after filtering fundamental wave and high harmonic components through a filter.

8. A computer device, comprising: The computer device comprises a memory and a processor, the memory stores a computer program, and the computer program is executed by the processor to make the processor execute the steps of the wireless signal and energy co-transmission method based on the hetero-frequency direction backtracking.

9. A computer readable storage medium, storing a computer program, the computer program is executed by a processor to make the processor execute the steps of the wireless signal and energy co-transmission method based on the hetero-frequency direction backtracking.

10. An information data processing terminal, characterized by The information data processing terminal is used to realize the wireless signal and energy co-transmission system based on the hetero-frequency direction backtracking.

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