Signal transmission device and communication method

Abstract

The invention provides a signal transmission device and a communication method. Wherein the signal transmission device is used for transmitting a signal from one side of the medium structure to the other side of the medium structure. The dielectric structure comprises a first surface and a second surface which are oppositely arranged in the thickness direction of the dielectric structure, and the signal transmission device comprises a first signal transmission module arranged on the first surface side and a second signal transmission module arranged on the second surface side. The first signal transmission module comprises a signal conversion unit and at least one first piezoelectric assembly which are arranged on the first surface, the signal conversion unit is configured to convert a radio frequency signal sent by the signal sending terminal into a first electric signal, and the first piezoelectric assembly is configured to generate corresponding deformation according to the first electric signal; the dielectric structure generates corresponding displacement according to the deformation generated by the first piezoelectric assembly, and the second signal transmission module is configured to determine a target signal according to a plurality of displacement amounts generated by the dielectric structure within a preset time and transmit the signal to a signal receiving terminal.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of communication, and particularly relates to a signal transmission device and a communication method. BACKGROUND

[0002] In the field of modern communication and signal transmission, traditional wired and wireless transmission methods have certain limitations in certain specific environments. For example, in some metal-enclosed spaces, signal transmission loss is serious, and in some harsh environments such as strong electromagnetic interference, high temperature, and high humidity, traditional transmission methods may be severely affected, resulting in signal distortion, transmission interruption, and other problems. In addition, for some occasions with high requirements for signal confidentiality, traditional transmission methods are also difficult to meet the demand. Therefore, it is particularly important to develop a new type of signal transmission device and communication method that can stably and efficiently transmit signals in various complex environments while ensuring signal confidentiality. SUMMARY

[0003] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and provide a signal transmission device and a communication method.

[0004] The signal transmission device is configured to transmit signals from one side of a medium structure to the other side; the medium structure includes a first surface and a second surface arranged opposite along the thickness direction thereof; the signal transmission device includes a first signal transmission module arranged on the side of the first surface, and a second signal transmission module arranged on the side of the second surface.

[0005] The first signal transmission module includes a signal conversion unit and at least one first piezoelectric component electrically connected; the signal conversion unit is configured to receive a radio frequency signal sent by a signal sending terminal, and convert the radio frequency signal into a first electric signal; the first piezoelectric component is arranged on the first surface and is configured to generate a corresponding deformation according to the first electric signal; the medium structure generates a corresponding displacement according to the deformation generated by the first piezoelectric component.

[0006] The second signal transmission module is configured to determine a target signal according to a plurality of displacement amounts generated by the medium structure within a preset time, and transmit the target signal to a signal receiving terminal.

[0007] In some embodiments, the second signal transmission module includes at least one second piezoelectric component and a first signal processing unit.

[0008] The second piezoelectric component is arranged on the second surface and is configured to generate a corresponding deformation according to the displacement amount generated by the medium structure.

[0009] The first signal processing unit is configured to determine the target signal according to a deformation amount generated by the second piezoelectric component within the preset time, and transmit the target signal to the signal receiving terminal.

[0010] In some embodiments, the second signal transmission module comprises a laser emitter, a beam splitter, a photodetector, and a second signal processing unit.

[0011] The laser emitter is configured to emit an initial laser signal.

[0012] The beam splitter is configured to split the initial laser signal into a first laser signal and a second laser signal, transmit the first laser signal to the second surface of the medium structure, and transmit the second laser signal to the photodetector; the first laser signal becomes a third laser signal after being reflected by the second surface; the frequency of the second laser signal is the same as that of the first laser signal, the frequency of the third laser signal is different from that of the first laser signal, and the frequency of the third laser signal carries information of a displacement amount generated by the medium structure.

[0013] The photodetector is configured to receive the second laser signal and the third laser signal, and generate an interference signal according to the second laser signal and the third laser signal.

[0014] The second signal processing unit is configured to determine the target signal based on a plurality of interference signals within the preset time, and transmit the target signal to the signal receiving terminal.

[0015] In some embodiments, the second signal transmission module further comprises a first mirror and a second mirror.

[0016] The first mirror is configured to adjust the transmission direction of the second laser signal, so that the second laser signal is transmitted to the photodetector.

[0017] The second mirror is configured to adjust the transmission direction of the third laser signal, so that the third laser signal is transmitted to the photodetector.

[0018] In some embodiments, the second signal transmission module comprises a signal generator, a power divider, a transmitting antenna, a receiving antenna, a mixer, a signal extraction unit, and a third signal processing unit.

[0019] The signal generator is configured to output an initial periodic signal.

[0020] The power divider is configured to divide the initial periodic signal into a first periodic signal and a second periodic signal, transmit the first periodic signal to the second surface of the medium structure through the transmitting antenna, and transmit the second periodic signal to the frequency mixer; the frequency of the second periodic signal is the same as that of the first periodic signal; the first periodic signal becomes a third periodic signal after being reflected by the second surface, and the third periodic signal is transmitted to the frequency mixer through the receiving antenna; the frequency of the third periodic signal is different from that of the first periodic signal, and the frequency of the third periodic signal carries information of the displacement amount generated by the medium structure;

[0021] The frequency mixer is configured to perform frequency mixing processing on the second periodic signal and the third periodic signal, and output an intermediate frequency signal; the intermediate frequency signal includes a first original sub-signal, a second original sub-signal, a sum frequency sub-signal and a difference frequency sub-signal; the frequency of the first original sub-signal is the same as that of the second periodic signal, the frequency of the second original sub-signal is the same as that of the third periodic signal, the frequency of the sum frequency sub-signal is the sum of the frequencies of the second periodic signal and the third periodic signal, and the frequency of the difference frequency sub-signal is the difference between the frequencies of the second periodic signal and the third periodic signal;

[0022] The signal extraction unit is configured to extract the frequency and phase of the difference frequency sub-signal;

[0023] The third signal processing unit is configured to determine the target signal based on the frequencies and phases of a plurality of difference frequency sub-signals within the preset time, and transmit the target signal to the signal receiving terminal.

[0024] In some embodiments, the second signal transmission module further includes a power amplifier and a low-noise signal amplifier;

[0025] The power amplifier is arranged between the power divider and the transmitting antenna, and is configured to amplify the power of the first periodic signal, and transmit the amplified signal to the second surface of the medium structure through the transmitting antenna;

[0026] The low-noise signal amplifier is arranged between the receiving antenna and the frequency mixer, and is configured to amplify the power of the third periodic signal, and transmit the amplified signal to the frequency mixer.

[0027] In some embodiments, the third signal processing unit includes a Fourier transform sub-unit, a phase extraction sub-unit, a phase unwrapping sub-unit, a filtering sub-unit and a signal output sub-unit;

[0028] The Fourier transform subunit is configured to perform Fourier transform on the frequency and phase of the difference frequency sub-signal;

[0029] The phase extraction subunit is configured to extract data from the phase after Fourier transform and output phase data.

[0030] The phase unwinding subunit is configured to recover the continuous phase based on the phase data;

[0031] The filtering subunit is configured to filter the frequency of the difference frequency sub-signal after Fourier transform and the continuous phase.

[0032] The signal output subunit is configured to output the target signal based on the frequency and continuous phase of the multiple filtered difference frequency sub-signals within the preset time period, and transmit the target signal to the signal receiving terminal.

[0033] In some embodiments, the second signal transmission module further includes an analog-to-digital conversion unit;

[0034] The analog-to-digital conversion unit is disposed between the signal extraction unit and the third signal processing unit, and is configured to convert the frequency and phase of the analog signal extracted by the signal extraction unit into the frequency and phase of the digital signal.

[0035] In some embodiments, the first signal transmission module further includes a signal amplification unit;

[0036] The signal amplification unit is disposed between the signal conversion unit and the first piezoelectric component, and is configured to amplify the first electrical signal output by the signal conversion unit and transmit the amplified signal to the first piezoelectric component.

[0037] This disclosure also provides a communication method implemented using the signal transmission device described in the above embodiments.

[0038] In some embodiments, the communication method includes:

[0039] Receive radio frequency signals sent by the signal transmitting terminal;

[0040] The radio frequency signal is converted into a first electrical signal, which causes the first piezoelectric component to produce a deformation; the deformation generated by the first piezoelectric component causes the dielectric structure to produce a displacement.

[0041] Based on the multiple displacements generated by the medium structure within a preset time, the target signal is determined and transmitted to the signal receiving terminal. Attached Figure Description

[0042] Figure 1 This is a communication architecture diagram for realizing communication between a signal transmitting terminal and a signal receiving terminal.

[0043] Figure 2 This is another communication architecture diagram for realizing communication between a signal transmitting terminal and a signal receiving terminal.

[0044] Figure 3 This is a communication architecture diagram for another method of communication between a signal transmitting terminal and a signal receiving terminal.

[0045] Figure 4 This is a communication architecture diagram for another method of communication between a signal transmitting terminal and a signal receiving terminal.

[0046] Figure 5 This is a communication architecture diagram for implementing communication between a signal transmitting terminal and a signal receiving terminal, provided by an embodiment of this disclosure.

[0047] Figure 6 This is an architectural diagram of a first signal transmission module provided in an embodiment of the present disclosure.

[0048] Figure 7 This is an architectural diagram of a signal amplification unit provided in an embodiment of the present disclosure.

[0049] Figure 8 This is a schematic diagram of another signal amplification unit provided in an embodiment of the present disclosure.

[0050] Figure 9 This is a communication architecture diagram for another embodiment of communication between a signal transmitting terminal and a signal receiving terminal provided in this disclosure.

[0051] Figure 10 for Figure 9 Architecture diagram of the second signal transmission module.

[0052] Figure 11 This is a communication architecture diagram for another embodiment of communication between a signal transmitting terminal and a signal receiving terminal provided in this disclosure.

[0053] Figure 12 for Figure 11 Architecture diagram of the second signal transmission module. Detailed Implementation

[0054] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of objects. "Above," "below," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0056] In recent years, the construction of new maritime information infrastructure in my country has been booming. With the advent of the 5G era, the marine economy is ushering in new opportunities for large-scale development. Maritime communication support, including maritime operational communications, maritime safety and emergency communications, and maritime tourism, has become a key focus for operators. Basic telecommunications companies are accelerating 5G coverage in distant waters, extending 5G capabilities to the ocean and integrating it into the construction of a "smart ocean." Against this backdrop, the research and development of signal transmission devices and communication methods are particularly important.

[0057] Currently, there are two main methods of maritime communication: one relies on satellite, and the other relies on the existing 4G and 5G networks covering coastal areas. Both methods require the installation of dedicated receiving terminals on the ship's hull (top of the bridge). Because the hull is mostly made of metal steel plates, signal penetration loss is significant, making it difficult for external signals to wirelessly reach the interior. Therefore, it is necessary to make openings in the hull to introduce signals into the interior via radio frequency cables or digital cables, and then provide secondary coverage through indoor routers or other signal terminals. Figure 1 As shown. While this method solves the signal coverage problem, it presents challenges such as construction difficulties, the need for specialized installation, and the potential for compromising the ship's sealing.

[0058] These problems can be solved using wireless communication. The glass of the ship's bridge can serve as a medium for signal transmission with low loss and without physical disruption.

[0059] Specifically, there are three existing technologies that can achieve wireless communication. (See reference...) Figure 2 The first implementation involves adding a high-power amplifier after the signal transmitting terminal. This amplifier increases the signal strength of the signal transmitted by the terminal, thus offsetting signal loss caused by obstacles (such as the driver's cab window) during transmission. (See reference...) Figure 3 The second approach involves adding a beam-adjustable terminal device to the signal transmitting terminal, aligning the main beam with the bridge glass to ensure most of the signal is focused and covers the interior with low-loss glass. This method utilizes the directional transmission characteristics of the beam-adjustable terminal device, significantly improving signal transmission efficiency and reducing signal loss during transmission. Simultaneously, by adjusting the direction and angle of the beam, it ensures accurate signal coverage within the bridge, meeting indoor communication needs. Furthermore, this method avoids drilling holes in the hull, maintaining the hull's integrity and sealing, and reducing construction difficulty and cost. (Refer to...) Figure 4 The third implementation method involves transmitting signals using optical repeaters. Specifically, the principle of an optical repeater is to modulate a radio frequency (RF) signal onto an optical carrier, allowing the signal to pass through glass in the form of light. The RF signal is then demodulated by a reverse device located on the other side of the glass. This method utilizes the low signal loss and strong anti-interference capabilities of optical signals during transmission, especially when passing through obstacles such as the glass of the cockpit, significantly reducing signal attenuation. Optical repeaters not only improve signal transmission quality but also maintain a clean electromagnetic environment within the ship's cabin, avoiding electromagnetic interference problems that might arise from adding additional signal transmission equipment.

[0060] However, in the first implementation, the high power amplifier consumes a lot of energy, leading to electromagnetic pollution and communication interference, which is inconsistent with the current trend of green energy conservation. Furthermore, the high power amplifier increases the complexity and cost of the equipment, hindering large-scale promotion and application. In the second implementation, the beam-tunable terminal equipment includes a large antenna array, phase shifters, and complex phase control modules, which inevitably increases communication costs and equipment complexity. In addition, beam-tunable terminal equipment requires high antenna calibration accuracy; even a slight deviation in the antenna array can lead to a decrease in signal focusing effect, affecting communication quality. In the third implementation, the optical repeater equipment includes devices such as lithium niobate electro-optic modulators or silicon photoelectric modulators, which are costly. Moreover, the optical carrier generally uses a laser, requiring strict optical path alignment between the internal and external units during installation. During use, any slight vibration or temperature change can cause optical path misalignment, affecting signal transmission quality. To maintain optical path stability, additional stabilization devices and temperature control equipment are often required, which undoubtedly further increases the system's complexity and cost.

[0061] In view of this, the present disclosure provides a signal transmission device that can transmit a signal from one side of a medium structure to the other, wherein a signal transmitting terminal is disposed on one side of the medium structure and a signal receiving terminal is disposed on the other side. Specifically, Figure 5 This is a communication architecture diagram provided by an embodiment of the present disclosure for realizing communication between a signal transmitting terminal and a signal receiving terminal, with reference to... Figure 5 The dielectric structure has a first surface S1 and a second surface S2 arranged opposite to each other along its thickness direction. The first surface S1 is closer to the outside than the second surface S2; that is, the first surface side of the dielectric structure is outdoors, and the second surface side is indoors. A signal transmitting terminal is located on the first surface side, and a signal receiving terminal is located on the second surface side. The signal transmitting terminal includes, but is not limited to, base stations, satellite ground stations, and mobile terminals, and the signals it transmits are electromagnetic waves transmitted in space, i.e., radio frequency signals. The signal receiving terminal includes, but is not limited to, mobile terminals, routers, base station receivers, or other devices capable of receiving and processing signals. The dielectric structure includes, but is not limited to, the glass of a ship's bridge or the walls of a building.

[0062] For details, please refer to... Figure 5The signal transmission device includes a first signal transmission module disposed on a first surface and a second signal transmission module disposed on a second surface. The first signal transmission module includes a signal conversion unit and at least one first piezoelectric component. The signal conversion unit receives a radio frequency signal transmitted by a signal receiving terminal and converts the radio frequency signal into a first electrical signal. Exemplarily, the signal conversion unit includes, but is not limited to, an antenna, a base station receiver, or other devices capable of receiving and converting signals. The first piezoelectric component includes a first electrode, a first piezoelectric layer, and a second electrode stacked sequentially along the thickness direction of the dielectric structure. One of the first and second electrodes is connected to the signal conversion unit, and the other is grounded or connected to a reference level signal terminal. Thus, the first electrical signal can be transmitted from the signal conversion unit to the first piezoelectric component, controlling the first piezoelectric component to deform.

[0063] In some examples, the first and second electrodes can be made of conductive materials resistant to high-temperature oxidation, such as titanium / platinum (Ti / Pt), indium tin oxide (ITO), gold (Au), ruthenium oxide (RuO2), and lanthanum nickelate (LaNiO3), and the first piezoelectric layer can have a piezoelectric constant greater than or equal to 6 C / m. 2 Piezoelectric materials include lead zirconate titanate (PZT), lead magnesium niobate-lead titanate (PMNT), lead metaniobate-barium lithium (PBLN), and barium titanate (BT). Materials with higher piezoelectric constants can generate larger voltages under mechanical stress, thus exhibiting efficient electromechanical conversion capabilities (i.e., the ability to convert mechanical energy into electrical energy). Furthermore, materials with higher piezoelectric constants also possess high strength and stiffness, enabling them to withstand significant mechanical stress and ensuring good stability and reliability of the first piezoelectric layer even in complex mechanical environments.

[0064] Here, the first piezoelectric component can adopt a large-area sheet structure or a small-area block structure, or it can adopt a shape adapted to the first surface of the dielectric structure to ensure good fit and signal transmission effect, and enhance the flexibility of the signal transmission device to adapt to different application scenarios and installation requirements. It should be noted that in the actual installation process, one or more first piezoelectric components need to be fabricated on the substrate first, and then the first piezoelectric components fabricated on the substrate are mounted on the first surface of the dielectric structure. For example, depending on different installation requirements, the substrate can be a flexible substrate or a rigid substrate. Flexible substrates are advantageous for adapting to irregularly shaped dielectric structures, while rigid substrates are advantageous for providing sufficient support for the first piezoelectric components. When the substrate includes multiple first piezoelectric components, the arrangement of each first piezoelectric component can also be designed according to specific requirements.

[0065] In some examples, to reduce the impact of noise on signal transmission, such as Figures 5-6As shown, the first signal transmission module further includes a signal amplification unit disposed between the signal conversion unit and the first piezoelectric component. The signal amplification unit is configured to amplify the first electrical signal output by the signal conversion unit. This amplification can be, for example, amplitude amplification or power amplification. The amplified signal is then transmitted to the first piezoelectric component for transmission. Specifically, as shown... Figure 7 As shown, when the first electrical signal is an analog signal, the signal amplification unit may include an amplifier and a power supply that controls the amplifier's operation. Under the control of the power supply, the amplifier can amplify the analog signal without distortion. Figure 8 As shown, when the first electrical signal is a digital signal, the signal amplification unit includes a DC source and a digital switch. The effective amplitude of the DC source is greater than the effective amplitude of the first electrical signal. During signal amplification, the first electrical signal controls the digital switch. Under the control of the first electrical signal, the digital switch can convert the DC source signal into a digital signal with the same waveform and duty cycle as the first electrical signal but a larger amplitude, thereby amplifying the first electrical signal.

[0066] When the first electrical signal converted by the signal conversion unit is transmitted to the first piezoelectric component, the first piezoelectric layer will deform accordingly due to the piezoelectric effect of the piezoelectric material, thereby causing the dielectric structure to displace accordingly. Within a preset time, multiple displacements generated by the dielectric structure are detected or received by the second signal transmission module located on the second surface of the dielectric structure, and the target signal can be output and transmitted to the signal receiving terminal located on the second surface. In this application, the piezoelectric effect of the piezoelectric material is used to transmit signals, which can effectively reduce costs and equipment complexity, while improving the signal anti-interference capability during transmission. It should be noted that the preset time can be designed differently according to product requirements.

[0067] In some examples, continue to refer to Figure 5 The second signal transmission module includes at least one second piezoelectric component and a first signal processing unit connected to the second piezoelectric component. The second piezoelectric component is disposed on a second surface and includes a third electrode, a second piezoelectric layer, and a fourth electrode stacked sequentially along the thickness direction of the dielectric structure. The third and fourth electrodes may be made of the same conductive material as the first and second electrodes, and the second piezoelectric layer may be made of the same piezoelectric material as the first piezoelectric layer. After the dielectric structure undergoes displacement, the second piezoelectric layer in the second piezoelectric component disposed on the second surface deforms accordingly due to the inverse piezoelectric effect of the piezoelectric material. In other words, the deformation of the second piezoelectric component carries radio frequency signal information.

[0068] Similar to the first piezoelectric component, the second piezoelectric component can also adopt a large-area sheet structure or a small-area block structure, or it can adopt a shape adapted to the second surface of the dielectric structure to ensure good fit and signal transmission effect. Similarly, during the installation process, the second piezoelectric component also needs to be formed on a flexible substrate or a rigid substrate before being mounted on the second surface of the dielectric structure.

[0069] Subsequently, after detecting the deformation of the second piezoelectric component, the first signal processing unit can determine the target signal based on the multiple deformations generated by the second piezoelectric component within a preset time, and transmit the target signal to the signal receiving terminal, thus achieving lossless communication between the signal transmitting terminal and the signal receiving terminal. The first signal processing unit includes, but is not limited to, chips, integrated circuit boards, or other electronic components capable of processing electrical signals. These electronic components possess high sensitivity, high stability, and high precision, enabling them to accurately convert the deformation of the second piezoelectric component into electrical signals and further process them to obtain the target signal.

[0070] Figure 9 This is a communication architecture diagram illustrating another embodiment of communication between a signal transmitting terminal and a signal receiving terminal provided by this disclosure. Figure 10 for Figure 9 The specific architecture diagram of the second signal transmission module in the diagram is as follows: Figures 9-10 As shown in the figure, in this example, the second signal transmission module includes a laser transmitter, a beam splitter, a photodetector, and a second signal processing unit (to simplify the figures and clearly show the connection relationship between the second signal transmission module and the signal receiving terminal,...). Figure 9 In this diagram, structure Q1 refers to the laser emitter, beam splitter, and photodetector. The laser emitter emits an initial laser signal with a frequency of f0. The beam splitter divides this initial laser signal into a first laser signal and a second laser signal. Here, the beam splitter only redistributes the power of the initial laser signal; it does not change the frequency of the initial laser signal. That is, the frequencies of both the first and second laser signals are the same as the initial laser signal, f0. The amplitudes of the first and second laser signals are affected by the splitting ratio of the beam splitter. When the splitting ratio is 1:1, the amplitudes of the first and second laser signals are the same; when the splitting ratio is not 1:1, the two amplitudes are different.

[0071] Subsequently, the beam splitter transmits the split first laser signal to the second surface of the dielectric structure. It should be noted that the first laser signal transmitted to the second surface of the dielectric structure is used to detect and carry displacement information of the dielectric structure. Specifically, when the first laser signal is transmitted to the second surface of the dielectric structure, the vibrating dielectric structure causes a Doppler frequency shift in the first laser signal, with a frequency shift frequency of fd = 2v / λ, where v is the speed of light and λ is the wavelength of the first laser signal. Therefore, after reflection from the second surface of the dielectric structure, the first laser signal becomes a third laser signal with a frequency of f0 + fd. In other words, the frequency of the third laser signal carries information about the displacement generated by the dielectric structure, which is to say, it carries relevant information about the radio frequency signal.

[0072] Continue to refer to Figure 10 Simultaneously, while transmitting the first laser signal to the second surface of the dielectric structure, the beam splitter transmits the second laser signal to the photodetector. Here, the second laser signal is used as a reference signal for comparison with the third laser signal. Specifically, after receiving the second and third laser signals, the photodetector converges them onto the sensor. The two beams interfere on the sensor surface, generating an interference signal with a frequency of f0 + fd. In other words, the frequency of the interference signal carries information about the displacement generated by the dielectric structure, which is related to the radio frequency signal.

[0073] After that, as Figure 9 As shown, the second signal processing unit can determine the target signal based on the frequencies of multiple interference signals within a preset time period and transmit the target signal to the signal receiving terminal. The second signal processing unit may include circuit components such as an analog-to-digital converter (ADC), a filter, and a demodulator. The ADC converts the analog frequencies of the interference signals into digital signals, facilitating subsequent digital signal processing. The filter removes noise components from the digital signal, improving the signal-to-noise ratio. The demodulator recovers the original analog signal from the digital signal according to a preset modulation scheme. Through this series of processes, the second signal processing unit can accurately and efficiently recover and transmit the radio frequency signal to the signal receiving terminal, achieving effective information transmission.

[0074] For example, continue to refer to Figure 10In addition to the laser emitter, beam splitter, and photodetector, the second signal transmission module also includes a first reflector and a second reflector. The first reflector is used to adjust the transmission direction of the second laser signal, ensuring it reaches the photodetector. The second reflector is used to adjust the transmission direction of the third laser signal, ensuring it reaches the photodetector as well. The first and second reflectors include, but are not limited to, plane mirrors or curved mirrors, to ensure that the second and third laser signals are accurately focused onto the photodetector. Furthermore, the first and second reflectors are preferably made of highly reflective materials to reduce laser signal loss during reflection and improve signal strength and stability.

[0075] Figure 11 This is a communication architecture diagram illustrating another embodiment of communication between a signal transmitting terminal and a signal receiving terminal provided in this disclosure. Figure 12 for Figure 11 The specific architecture diagram of the second signal transmission module is as follows: Figures 11-12 As shown in the figure, in this example, the second signal transmission module includes a signal generator, a power divider, a transmitting antenna, a receiving antenna, a mixer, a signal extraction unit, and a third signal processing unit (to simplify the figures and clearly show the connection relationship between the second signal transmission module and the signal receiving terminal,...). Figure 11 In this diagram, structure Q2 refers to the laser emitter, beam splitter, and photodetector. The signal generator outputs an initial periodic signal, which may include, but is not limited to, sawtooth or triangular waves. Sawtooth and triangular waves possess excellent frequency characteristics and waveform stability, ensuring high accuracy and reliability in distance measurement. The power divider splits the initial periodic signal into a first periodic signal and a second periodic signal, reducing signal loss. The transmitting antenna is positioned between the power divider and the dielectric structure, transmitting the first periodic signal (split by the power divider) to the second surface of the dielectric structure via radio frequency. The receiving antenna is positioned between the dielectric structure and the mixer, receiving the third periodic signal reflected from the dielectric structure and transmitting it to the mixer. Here, the power divider only redistributes the power of the initial periodic signal; it does not change the frequency of the periodic signal. That is, the first and second periodic signals have the same frequency as the initial periodic signal. However, the third periodic signal reflected from the second surface of the dielectric structure has a different frequency than the first periodic signal, and its frequency carries information about the displacement of the dielectric structure.

[0076] After that, continue to refer to Figure 12The mixer receives the second and third period signals and mixes them to output an intermediate frequency (IF) signal. This IF signal includes not only the frequency components of the original second and third period signals, but also their sum-frequency and difference-frequency components. Specifically, the IF signal comprises a first original sub-signal, a second original sub-signal, a sum-frequency sub-signal, and a difference-frequency sub-signal. The first original sub-signal has the same frequency as the second period signal, the second original sub-signal has the same frequency as the third period signal, the sum-frequency sub-signal has the sum of the frequencies of the second and third period signals, and the difference-frequency sub-signal has the difference between the frequencies of the second and third period signals. The frequency of the difference-frequency sub-signal is related to the displacement of the dielectric structure; that is, the frequency of the difference-frequency sub-signal carries information about the displacement generated by the dielectric structure.

[0077] After that, continue to refer to Figure 12 The signal extraction unit extracts the frequency and phase of the difference frequency sub-signal and sends them to the third signal processing unit. Based on the frequency and phase of the difference frequency sub-signal, the third signal processing unit can determine the target signal and transmit it to the signal receiving terminal, achieving lossless signal transmission. Here, the frequency and phase of the difference frequency sub-signal extracted by the signal extraction unit are data in analog signal form, which the third signal processing unit cannot directly process. Therefore, in some examples, such as... Figure 12 As shown, the second signal transmission module also includes an analog-to-digital conversion unit disposed between the signal extraction unit and the third signal processing unit. It is configured to convert the frequency and phase of the analog signal extracted by the signal extraction unit into the frequency and phase of the digital signal for further processing by the third signal processing unit.

[0078] In a specific example, the third signal processing unit includes a Fourier transform subunit, a phase extraction subunit, a phase unwinding subunit, a filtering subunit, and a signal output subunit. The Fourier transform subunit is configured to perform a Fourier transform on the frequency and phase of the difference frequency sub-signal output by the signal extraction unit, outputting the frequency and phase of the difference frequency sub-signal in the frequency domain. Performing a Fourier transform on the difference frequency sub-signal clearly displays the frequency components and their intensity within the signal, while filtering out high-frequency noise. Next, the phase extraction subunit extracts the phase data after the Fourier transform, outputting phase data carrying information about the displacement caused by the dielectric structure. It should be noted that each phase data point is independent. Then, the phase unwinding subunit unwinds each independent phase data point, outputting a continuous phase. Finally, the filtering subunit filters the frequency and continuous phase of the Fourier-transformed difference frequency sub-signal to remove noise and interference. Subsequently, the signal output subunit determines the target signal based on the frequencies of multiple filtered difference frequency sub-signals within a preset time and the continuous phase, and transmits the target signal to the signal receiving terminal to achieve lossless signal transmission. The aforementioned third signal processing unit includes, but is not limited to, chips, integrated circuit boards, or other electronic components capable of processing electrical signals.

[0079] In some specific examples, to improve the anti-interference capability of signal transmission, the second signal transmission module also includes a power amplifier and a low-noise amplifier, such as... Figure 12 As shown in the diagram. The power amplifier is positioned between the power divider and the transmitting antenna to amplify the first-cycle signal, thereby increasing its signal strength, reducing noise interference during transmission, and improving the signal-to-noise ratio. The low-noise signal amplifier is positioned between the mixer and the receiving antenna to amplify the third-cycle signal, thereby increasing its signal strength, reducing noise interference during transmission, and improving the signal-to-noise ratio.

[0080] This disclosure also provides a communication method that enables communication between a signal transmitting terminal and a signal receiving terminal. The communication method is implemented using the signal transmission device described in the above embodiments. Specifically, the communication method includes: receiving a radio frequency signal emitted by the signal transmitting terminal and converting the radio frequency signal into a first electrical signal. After the first electrical signal is transmitted to a first piezoelectric component, the first piezoelectric component deforms, causing a corresponding displacement in the dielectric structure attached to the first piezoelectric component. Subsequently, a second signal transmission module detects multiple displacements of the dielectric structure within a preset time period to determine a target signal and transmits the target signal to the signal receiving terminal, thereby achieving lossless communication between the signal transmitting terminal and the signal receiving terminal.

[0081] The communication method of this application utilizes the piezoelectric effect of piezoelectric materials to transmit signals, offering advantages such as low manufacturing cost, strong anti-interference capability, and high signal transmission efficiency. This method is not only suitable for short-range communication but can also be applied to long-range communication in some special environments, demonstrating broad application prospects. Furthermore, the communication method of this application achieves contactless signal transmission through the piezoelectric effect, avoiding communication interruptions caused by poor or damaged line connections in traditional wired communication methods, thus improving communication stability and reliability. Simultaneously, this method is easy to integrate and expand, allowing for convenient connection and communication with other electronic devices, further broadening its application scope. Therefore, the communication method of this application has enormous development potential in the future field of wireless communication.

[0082] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A signal transmission device for transmitting a signal from one side of a dielectric structure to another; said dielectric structure includes a first surface and a second surface disposed opposite to each other along its thickness direction; wherein, The signal transmission device includes a first signal transmission module disposed on the first surface side and a second signal transmission module disposed on the second surface side; The first signal transmission module includes an electrically connected signal conversion unit and at least one first piezoelectric component; the signal conversion unit is configured to receive a radio frequency signal transmitted by a signal transmitting terminal and convert the radio frequency signal into a first electrical signal; the first piezoelectric component is disposed on the first surface and configured to generate a corresponding deformation according to the first electrical signal; the dielectric structure generates a corresponding displacement according to the deformation generated by the first piezoelectric component; The second signal transmission module is configured to determine the target signal based on the multiple displacements generated by the medium structure within a preset time, and transmit the target signal to the signal receiving terminal.

2. The signal transmission device according to claim 1, wherein, The second signal transmission module includes at least one second piezoelectric component and a first signal processing unit; The second piezoelectric component is disposed on the second surface and configured to generate corresponding deformation according to the amount of displacement generated by the dielectric structure; The first signal processing unit is configured to determine the target signal based on the deformation generated by the second piezoelectric component within the preset time, and transmit the target signal to the signal receiving terminal.

3. The signal transmission device according to claim 1, wherein, The second signal transmission module includes a laser emitter, a beam splitter, a photodetector, and a second signal processing unit; The laser emitter is configured to emit an initial laser signal; The beam splitter is configured to split the initial laser signal into a first laser signal and a second laser signal, and to transmit the first laser signal to a second surface of the dielectric structure, and to transmit the second laser signal to the photodetector. The first laser signal is reflected by the second surface and becomes a third laser signal; the frequency of the second laser signal is the same as the frequency of the first laser signal, the frequency of the third laser signal is different from the frequency of the first laser signal, and the frequency of the third laser signal carries information about the displacement generated by the medium structure. The photodetector is configured to receive the second laser signal and the third laser signal, and to generate an interference signal based on the second laser signal and the third laser signal; The second signal processing unit is configured to determine the target signal based on a plurality of interference signals within the preset time period, and transmit the target signal to the signal receiving terminal.

4. The signal transmission device according to claim 3, wherein, The second signal transmission module further includes a first reflector and a second reflector; The first reflector is configured to adjust the transmission direction of the second laser signal so that the second laser signal is transmitted to the photodetector; The second reflector is configured to adjust the transmission direction of the third laser signal so that the third laser signal is transmitted to the photodetector.

5. The signal transmission device according to claim 1, wherein, The second signal transmission module includes a signal generator, a power divider, a transmitting antenna, a receiving antenna, a mixer, a signal extraction unit, and a third signal processing unit; The signal generator is configured to output an initial periodic signal; The power divider is configured to divide the initial periodic signal into a first periodic signal and a second periodic signal, transmit the first periodic signal to the second surface of the dielectric structure via the transmitting antenna, and transmit the second periodic signal to the mixer; the frequency of the second periodic signal is the same as the frequency of the first periodic signal; the first periodic signal is reflected by the second surface and becomes a third periodic signal, which is transmitted to the mixer via the receiving antenna; the frequency of the third periodic signal is different from the frequency of the first periodic signal, and the frequency of the third periodic signal carries information about the displacement generated by the dielectric structure. The mixer is configured to perform frequency mixing processing on the second periodic signal and the third periodic signal to output an intermediate frequency (IF) signal; the IF signal includes a first original sub-signal, a second original sub-signal, a sum frequency sub-signal, and a difference frequency sub-signal; the frequency of the first original sub-signal is the same as the frequency of the second periodic signal, the frequency of the second original sub-signal is the same as the frequency of the third periodic signal, the frequency of the sum frequency sub-signal is the sum of the frequencies of the second periodic signal and the third periodic signal, and the frequency of the difference frequency sub-signal is the difference between the frequencies of the second periodic signal and the third periodic signal; The signal extraction unit is configured to extract the frequency and phase of the difference frequency sub-signal; The third signal processing unit is configured to determine the target signal based on the frequency and phase of a plurality of difference frequency sub-signals within the preset time period, and transmit the target signal to the signal receiving terminal.

6. The signal transmission device according to claim 5, wherein, The second signal transmission module also includes a power amplifier and a low-noise signal amplifier; The power amplifier is disposed between the power divider and the transmitting antenna and is configured to amplify the power of the first periodic signal and transmit the amplified signal to the second surface of the dielectric structure through the transmitting antenna. The low-noise signal amplifier is disposed between the receiving antenna and the mixer and is configured to amplify the power of the third-cycle signal and transmit the amplified signal to the mixer.

7. The signal transmission device according to claim 5, wherein, The third signal processing unit includes a Fourier transform subunit, a phase extraction subunit, a phase dewinding subunit, a filtering subunit, and a signal output subunit; The Fourier transform subunit is configured to perform Fourier transform on the frequency and phase of the difference frequency sub-signal; The phase extraction subunit is configured to extract data from the phase after Fourier transform and output phase data. The phase unwinding subunit is configured to recover the continuous phase based on the phase data; The filtering subunit is configured to filter the frequency of the difference frequency sub-signal after Fourier transform and the continuous phase. The signal output subunit is configured to output the target signal based on the frequency and continuous phase of the multiple filtered difference frequency sub-signals within the preset time period, and transmit the target signal to the signal receiving terminal.

8. The signal transmission device according to claim 5, wherein, The second signal transmission module also includes an analog-to-digital conversion unit; The analog-to-digital conversion unit is disposed between the signal extraction unit and the third signal processing unit, and is configured to convert the frequency and phase of the analog signal extracted by the signal extraction unit into the frequency and phase of the digital signal.

9. The signal transmission device according to any one of claims 1-8, wherein, The first signal transmission module further includes a signal amplification unit; The signal amplification unit is disposed between the signal conversion unit and the first piezoelectric component, and is configured to amplify the first electrical signal output by the signal conversion unit and transmit the amplified signal to the first piezoelectric component.

10. A communication method implemented by a signal transmission device as described in any one of claims 1-9.

11. The communication method according to claim 10, wherein, The communication method includes: Receive radio frequency signals sent by the signal transmitting terminal; The radio frequency signal is converted into a first electrical signal, which causes the first piezoelectric component to produce a deformation; the deformation generated by the first piezoelectric component causes the dielectric structure to produce a displacement. Based on the multiple displacements generated by the medium structure within a preset time, the target signal is determined and transmitted to the signal receiving terminal.

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