A laser and radio frequency dual-system data communication device and method based on SDR

Abstract

The present invention discloses a laser and radio frequency dual-system data communication device and method based on SDR, belonging to the field of software radio and laser communication technology. The device provided by the present invention fixes the optical path device side by side on the lower plate through a fixing component, and the upper plate is an SDR circuit board, which effectively reduces the volume and weight of the traditional laser communication optical head; by optimizing the layout and selection of the optical path device and radio frequency components, the device redundancy is reduced, the goals of lightweight and miniaturization are achieved, the portability and fixing stability of the device are improved, and the quality of laser transmission is guaranteed; through the control of the host computer and the main control circuit chip, flexible switching between laser and wireless radio frequency data communication can be achieved, overcoming the limitation of the single application scenario of traditional radio frequency laser dual-mode communication devices, enabling the device to adapt to a variety of communication scenarios and needs, and improving the flexibility and adaptability of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of software defined radio (SDR) and laser communication, and in particular to a laser and radio frequency dual-system data communication device and method based on SDR. Background Art

[0002] With the rapid development of wireless communications, numerous cutting-edge technologies have emerged and are rapidly gaining widespread adoption. Software-defined radio (SDR), for example, leverages its ability to flexibly load various communication software onto a universal communications hardware platform, enabling the diversification of communication functions and demonstrating excellent compatibility and programmability. However, despite its comprehensive capabilities, SDR still relies on electromagnetic waves for signal transmission, exposing it to multiple security risks such as signal interception, theft, or interference, which in turn impacts signal transmission security and quality.

[0003] Infrared laser communication, a key form of wireless communication, transmits data via laser carrier waves. Compared to standard SDR communications, infrared laser communication offers a higher cost-performance ratio, boasting advantages such as low bandwidth, ease of implementation, strong resistance to electromagnetic interference, high-speed applications, flexible spatial access, and economical practicality. It is widely used in indoor and outdoor point-to-point communications, infrared communications, and military infrared fuses, and has gained widespread acceptance in mobile communication devices.

[0004] Given the unique characteristics of infrared lasers, such as clear directionality, excellent monochromaticity, high coherence, strong invisibility and good concealment, the industry has begun to explore the combination of laser technology and SDR, aiming to integrate the advantages of both and design an SDR-based "laser + RF" dual-mode communication device.

[0005] However, the current SDR-based "laser + RF" dual-mode communication devices on the market still have the following significant problems:

[0006] First, excessive weight and size. Traditional design concepts make it difficult to miniaturize laser communication optical heads while maintaining performance. This results in a high overall weight and size, insufficient fixing stability, and thus affects the quality of laser transmission. Furthermore, optical components are too large. For example, while a periscope-style coarse pointing mechanism offers the advantages of a wide pointing range and relatively stable rotational load, the large aperture and two large reflectors required significantly increase the weight of the entire optical head and create excessive redundancy, thus affecting overall performance and reliability.

[0007] Second, application scenarios are limited. Existing RF-laser dual-mode communication devices have limited application scenarios and numerous restrictions. For example, they only support radio transmission or single laser transmission, and lack flexible switching. Constrained by transmission scenarios and environmental conditions, they struggle to adapt to the demands of diverse applications, including stable laser and radio communications, limiting their potential for widespread adoption.

[0008] Therefore, how to achieve lightweight, miniaturization and flexible switching of SDR-based "laser + RF" dual-mode communication devices has become a technical challenge that technicians in this field urgently need to overcome. Summary of the Invention

[0009] In view of the defects of the existing technology, the present invention provides a laser and radio frequency dual-system data communication device and method based on SDR, which can effectively solve the above problems.

[0010] The present invention solves the above technical problems through the following technical solutions:

[0011] A laser and radio frequency dual-system data communication device based on SDR includes a main body, a host computer, a transmitting antenna, and a receiving antenna. The main body includes an optical path device, an upper plate and a lower plate fixed by a supporting device. The optical path device includes a laser emitting device and a laser receiving device for transmitting and receiving signals via laser. The laser emitting device and the laser receiving device are fixed side by side on the lower plate via a fixing assembly. The upper plate is an SDR circuit board. A first USB interface of the host computer is connected to the power input terminal of the SDR circuit board for powering the SDR circuit board and communicating. The lower plate is provided with a main control circuit chip, a radio frequency switching transmitting chip, and a radio frequency switching receiving chip.

[0012] The signal communication end of the SDR circuit board is respectively connected to the first signal end of the RF switching transmitting chip and the first signal end of the RF switching receiving chip; the third signal end of the RF switching transmitting chip is connected to the transmitting antenna, and the second signal end of the RF switching transmitting chip is connected to the laser transmitting device; the third signal end of the RF switching receiving chip is connected to the receiving antenna, and the second signal end of the RF switching receiving chip is connected to the laser receiving device; the first output end of the main control circuit chip is respectively connected to the power supply voltage input end of the RF switching transmitting chip and the RF switching receiving chip, and the second output end of the main control circuit chip is respectively connected to the control voltage input end of the RF switching transmitting chip and the RF switching receiving chip, and the enable end of the RF switching transmitting chip and the RF switching receiving chip is grounded, for realizing switching laser and wireless data communication;

[0013] The power input end of the main control circuit chip is connected to the battery or the second USB interface of the host computer. The third output end of the main control circuit chip is divided into two paths. One path is connected to the laser emitting device through the level conversion circuit to power the laser emitting device. The other path is connected to the laser receiving device through the level conversion circuit, the boost circuit, and the digital potentiometer in sequence to power the laser receiving device. The main control circuit chip is also connected to a temperature sensor for obtaining the current temperature of the laser receiving device.

[0014] Furthermore, a receiving conditioning circuit is provided between the second signal end of the RF switching receiving chip and the laser receiving device, and a transmitting conditioning circuit is provided between the second signal end of the RF switching transmitting chip and the laser transmitting device, for decoupling, filtering and impedance matching to improve signal quality.

[0015] Furthermore, the laser emitting device includes a first lens barrel and a laser emitting diode, which is built into the first lens barrel and is used to converge the laser beam to be emitted by the laser emitting diode; the laser receiving device includes a second lens barrel and an avalanche photodiode, which is built into the second lens barrel and is used to converge the laser beam to be received by the avalanche photodiode.

[0016] Furthermore, the device also includes a display screen connected to the main control circuit chip, which is arranged above the SDR circuit board. The main control circuit chip is connected to the display screen through a DuPont line; the signal communication end of the SDR circuit board uses an IPEX soft line to connect the signal input end of the RF switching transmitting chip and the signal input end of the RF switching receiving chip respectively.

[0017] Furthermore, the device also includes a shell, which is a split structure, including an upper cover and a lower shell from top to bottom, the upper cover is provided with a first through hole corresponding to the display screen, and a second through hole corresponding to the first lens barrel and the second lens barrel is provided on one side of the lower shell, and a third through hole, a fourth through hole and a fifth through hole are provided on the other side, the third through hole is used to connect to the first USB interface of the host computer, the fourth through hole is used to connect to the battery or the second USB interface of the host computer, and the fifth through hole is used to pass through the transmitting antenna and the receiving antenna, and fixing screws are provided at the boundary position of the lower plate for fixing the device in the inner cavity of the lower shell, and the upper cover is fixedly connected to the lower shell by screws; the fixing assembly is an upper fixing plate, a lower fixing plate, a first auxiliary column and a second auxiliary column, wherein the upper fixing plate is tightly connected to the upper part of the first lens barrel and the second lens barrel through the first auxiliary column, and the lower fixing plate is tightly connected to the lower part of the first lens barrel and the second lens barrel through the second auxiliary column; the supporting device is four copper columns fixed between the upper plate and the lower plate.

[0018] Furthermore, the first lens barrel and the second lens barrel are respectively connected to a deepened lens barrel; the transmitting antenna and the receiving antenna are both rod-shaped.

[0019] Furthermore, the model of the RF switching transmitter chip and the RF switching receiver chip is HMC849ALP4CE. At this time, the first signal end is the RFC pin, the second signal end is the RF1 pin, the third signal end is the RF2 pin, the power supply voltage input end is the VDD pin, the control voltage input end is the Vctl pin, and the enable end is the EN pin; the model of the main control circuit chip is one of Pico and Pico W.

[0020] A laser and radio frequency dual-system data communication method based on SDR, using the above device,

[0021] When the host computer issues an instruction, the switching device switches to wireless radio frequency transmission mode.

[0022] The second output terminal of the main control circuit chip outputs a low level to the control voltage input terminal of the RF switching transmitting chip and the RF switching receiving chip, turns on the third signal terminal of the RF switching transmitting chip and the RF switching receiving chip, and communicates through the transmitting antenna and the receiving antenna;

[0023] When the host computer issues an instruction and the device switches to laser transmission mode,

[0024] The second output end of the main control circuit chip outputs a high level to the control voltage input end of the RF switching transmitting chip and the RF switching receiving chip, turns on the second signal end of the RF switching transmitting chip and the RF switching receiving chip, and communicates through the laser transmitting device and the laser receiving device.

[0025] Furthermore, when the host computer issues an instruction and the switching device uses a wireless radio frequency transmission mode, communication through the transmitting antenna and the receiving antenna specifically includes:

[0026] The host computer sends a signal transmission instruction and a signal to be transmitted to the SDR circuit board. The SDR circuit board processes the signal to be transmitted to obtain a processed signal, and transmits the processed signal to the transmitting antenna via the signal communication terminal, the first signal terminal, and the third signal terminal of the RF switching transmitting chip in sequence, thereby completing the transmission.

[0027] The host computer sends a signal receiving instruction to the SDR circuit board. The receiving antenna transmits the received signal to the signal communication end of the SDR circuit board through the third signal end and the first signal end of the RF switching receiving chip in sequence. The SDR circuit board receives the signal and processes it to obtain the processed signal, and transmits the processed signal to the host computer to complete the reception.

[0028] Furthermore, when the host computer issues an instruction and the switching device is in laser transmission mode, communication between the laser emitting device and the laser receiving device specifically includes:

[0029] The host computer sends a signal transmission instruction and a signal to be transmitted to the SDR circuit board. The output voltage of the third output terminal of the main control circuit chip is converted into the operating voltage of the laser emitting device through the level conversion circuit to drive the laser emitting device. The SDR circuit board processes the signal to be transmitted to obtain a processed signal, and transmits the processed signal to the laser emitting device via the signal communication terminal, the first signal terminal, and the second signal terminal of the RF switching transmitting chip in sequence, thereby completing the transmission.

[0030] The host computer sends a signal receiving instruction to the SDR circuit board and sets the operating voltage of the laser receiving device at 25°C; obtains the current operating voltage, and reads the current ambient temperature through the temperature sensor, and calculates the current optimal operating voltage of the laser receiving device based on the current ambient temperature. If the current operating voltage is not equal to the current optimal operating voltage, the output resistance of the digital potentiometer is adjusted through the level conversion circuit and the boost circuit until the current operating voltage is equal to the current optimal operating voltage, thereby driving the laser receiving device; the laser receiving device transmits the received signal to the signal communication terminal of the SDR circuit board via the second signal terminal and the first signal terminal of the RF switching receiving chip in sequence. The SDR circuit board receives the signal and processes it to obtain the processed signal, and transmits the processed signal to the host computer to complete the reception.

[0031] Compared with the prior art, the present invention has the following positive effects:

[0032] The device of the present invention fixes the optical path device side by side on the lower board through a fixing component, and the upper board is an SDR circuit board, which effectively reduces the volume and weight of the traditional laser communication optical head; by optimizing the layout and selection of the optical path device and the radio frequency component, the redundancy of the device is reduced, the goals of lightweight and miniaturization are achieved, the portability and fixing stability of the device are improved, and the quality of laser transmission is guaranteed; through the control of the upper computer and the main control circuit chip, flexible switching between laser and wireless radio frequency data communication can be achieved, overcoming the limitation of the single application scenario of the traditional radio frequency laser dual-mode communication device, so that the device can adapt to a variety of communication scenarios and needs, and improve the flexibility and adaptability of the device.

[0033] Furthermore, a conditioning circuit is provided, which reduces noise interference and signal distortion during signal transmission through functions such as decoupling, filtering and impedance matching, making the signal more stable during transmission, thereby improving the stability and reliability of signal transmission.

[0034] Furthermore, the laser emitting diode is built into the first lens barrel, and the design of the lens barrel helps to converge the laser beam to be emitted by the laser emitting diode, so that it has better directionality and focusing, ensuring that the laser beam can maintain a high energy density and a small divergence angle during transmission, thereby improving the accuracy and distance of communication; the avalanche photodiode is built into the second lens barrel, and the lens barrel enables the laser beam to be received to be more effectively focused on the photosensitive surface of the avalanche photodiode, thereby improving the sensitivity and efficiency of laser reception; at the same time, by building the laser emitting diode and the avalanche photodiode into the lens barrel, the internal structure of the device can be optimized, unnecessary components and space occupancy can be reduced, which helps to reduce the size and weight of the device and improve the portability and ease of use of the device; enabling the device to better adapt to different communication environments and scenarios, such as indoor, outdoor, long-distance or short-distance communication, etc., broadening the application range of the device.

[0035] Furthermore, the outer shell serves as the outer protective layer of the device and adopts a split structure, which is convenient for assembly and maintenance; at the same time, the outer shell can effectively protect the internal circuit boards, optical components and other key components, and prevent them from being damaged by external factors such as dust and moisture, thereby improving the durability and service life of the device; the first through hole set on the upper cover corresponds to the display screen, which is convenient for users to observe parameters; the design of the fixed component enables the laser transmitting and receiving device to be firmly fixed on the lower board while maintaining good optical alignment; the device is fixed in the inner cavity of the lower shell by fixing screws, and the upper cover is fixedly connected to the lower shell by screws, which enhances the structural stability of the device and reduces the risk of loosening or damage of internal components due to vibration or impact.

[0036] Furthermore, deepening the lens barrel can extend the transmission path of the laser beam within the lens barrel, thereby enhancing the focusing effect of the laser beam. At the same time, it can reduce interference from other indoor and outdoor light sources and ensure transmission quality. For the transmitting end, it helps to form a smaller and more concentrated laser beam, increasing the laser's energy density and transmission distance. For the receiving end, deepening the lens barrel can more effectively converge the received laser beam, improving the receiving sensitivity and signal-to-noise ratio of the avalanche photodiode. Both the transmitting antenna and the receiving antenna adopt a rod-shaped design. The rod-shaped antenna has better directivity and gain performance. The transmitting antenna can radiate electromagnetic waves more efficiently and send RF signals at a narrow beam angle, thereby increasing the signal transmission distance and penetration ability. The receiving antenna can more effectively receive RF signals from a specific direction, reduce the impact of interference and noise, and improve the reception quality and stability of the signal. In situations where long-distance communication or communication through obstacles is required, the design of deepening the lens barrel and rod-shaped antenna can provide stronger signal transmission capability and anti-interference ability.

[0037] The SDR-based laser and radio frequency dual-system data communication method provided by the present invention allows users to easily switch communication modes through host computer instructions according to actual needs. Both wireless radio frequency transmission and laser transmission can be selected, which improves the flexibility and adaptability of communication and makes it suitable for more diverse communication scenarios and needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0039] Figure 1 Schematic diagram of the framework of the device of the present invention;

[0040] Figure 2 It is a structural schematic diagram of the device of the present invention;

[0041] Figure 3 A rear view of an optical path device provided by an embodiment of the present invention;

[0042] Figure 4 A front view of an optical path device provided by an embodiment of the present invention

[0043] Figure 5 A schematic structural diagram of an optical path device provided by an embodiment of the present invention;

[0044] Figure 6 A schematic diagram of the upper cover structure provided by an embodiment of the present invention;

[0045] Figure 7 A schematic diagram of the lower housing structure provided by an embodiment of the present invention;

[0046] Figure 8 A voltage control flow chart of a laser receiving device provided by an embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of the connection between the RF switching transmitting chip and the RF switching receiving chip provided by an embodiment of the present invention.

[0048] Among them, 1 is an optical path device, 2 is a fixing component, 3 is an upper plate, 4 is a supporting device, 5 is a lower plate, 6-1 is a transmitting antenna, 6-2 is a receiving antenna, 7 is a fixing screw, 8 is an IPEX soft wire, 9 is a display screen, 10 is an upper fixing plate, 11 is a lower fixing plate, 12 is a first auxiliary column, 13 is a second auxiliary column, 14 is a laser emitting diode, 15 is an avalanche photodiode, 16 is a first lens barrel, 17 is a second lens barrel, 18 is a deepened lens barrel, 19 is an upper cover plate, 20 is a lower shell, 21 is a first through hole, 22 is a second through hole, 23 is a third through hole, 24 is a fourth through hole, and 25 is a fifth through hole. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0052] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] The present invention will be further described in detail below with reference to the accompanying drawings, which are intended to explain rather than limit the present invention.

[0056] See also Figure 1 and Figure 2 , a laser and radio frequency dual-system data communication device based on SDR, including a body, a host computer, a transmitting antenna 6-1 and a receiving antenna 6-2, the body including an optical path device 1, an upper plate 3 and a lower plate 5 fixed by a supporting device 4, the optical path device 1 including a laser emitting device and a laser receiving device for transmitting and receiving signals by laser, the laser emitting device and the laser receiving device are fixed side by side on the lower plate 5 by a fixing component 2, the upper plate 3 is an SDR circuit board, the first USB interface of the host computer is connected to the power input end of the SDR circuit board, for supplying power to the SDR circuit board and communicating; the lower plate 5 is provided with a main control circuit chip, a radio frequency switching transmitting chip and a radio frequency switching receiving chip, the signal communication end of the SDR circuit board is respectively connected to the first signal end of the radio frequency switching transmitting chip and the radio frequency switching receiving chip;

[0057] See also Figure 9 , the third signal end of the RF switching transmitting chip is connected to the transmitting antenna 6-1, and the second signal end of the RF switching transmitting chip is connected to the laser transmitting device; the third signal end of the RF switching receiving chip is connected to the receiving antenna 6-2, and the second signal end of the RF switching receiving chip is connected to the laser receiving device; the first output end of the main control circuit chip is respectively connected to the power supply voltage input end of the RF switching transmitting chip and the RF switching receiving chip, and the second output end of the main control circuit chip is respectively connected to the control voltage input end of the RF switching transmitting chip and the RF switching receiving chip, and the enable end of the RF switching transmitting chip and the RF switching receiving chip is grounded, which is used to realize switching laser and wireless data communication;

[0058] The power input end of the main control circuit chip is connected to the battery or the second USB interface of the host computer. The third output end of the main control circuit chip is divided into two paths. One path is connected to the laser emitting device through the level conversion circuit to power the laser emitting device. The other path is connected to the laser receiving device through the level conversion circuit, the boost circuit, and the digital potentiometer in sequence to power the laser receiving device. The main control circuit chip is also connected to a temperature sensor for obtaining the current temperature of the laser receiving device.

[0059] This device fixes the optical path device side by side on the lower board through a fixing component, and the upper board is an SDR circuit board, which effectively reduces the volume and weight of the traditional laser communication optical head; by optimizing the layout and selection of the optical path device and radio frequency components, the redundancy of the device is reduced, the goals of lightweight and miniaturization are achieved, the portability and fixed stability of the device are improved, and the quality of laser transmission is guaranteed; through the control of the upper computer and the main control circuit chip, flexible switching between laser and wireless radio frequency data communication can be achieved, overcoming the limitation of the single application scenario of traditional radio frequency laser dual-mode communication devices, so that the device can adapt to a variety of communication scenarios and needs, and improve the flexibility and adaptability of the device.

[0060] Specifically, a receiving conditioning circuit is arranged between the second signal end of the RF switching receiving chip and the laser receiving device, and a transmitting conditioning circuit is arranged between the second signal end of the RF switching transmitting chip and the laser transmitting device, which are used for decoupling, filtering and impedance matching to improve signal quality; the arranged conditioning circuit reduces noise interference and signal distortion during signal transmission through functions such as decoupling, filtering and impedance matching, making the signal more stable during transmission, thereby improving the stability and reliability of signal transmission.

[0061] For details, see Figure 3 and Figure 4 The laser emitting device includes a first lens barrel 16 and a laser emitting diode 14. The laser emitting diode 14 is built into the first lens barrel 16 and is used to converge the laser beam to be emitted by the laser emitting diode 14. The laser receiving device includes a second lens barrel 17 and an avalanche photodiode 15. The avalanche photodiode 15 is built into the second lens barrel 17 and is used to converge the laser beam to be received by the avalanche photodiode 15. The laser emitting diode is built into the first lens barrel. The design of the lens barrel helps to converge the laser beam to be emitted by the laser emitting diode, so that it has better directionality and focusing, ensuring that the laser beam can maintain a high energy density and a small The divergence angle is increased, thereby improving the accuracy and distance of communication; the avalanche photodiode is built into the second lens barrel, and the lens barrel enables the laser beam to be received to be more effectively focused on the photosensitive surface of the avalanche photodiode, thereby improving the sensitivity and efficiency of laser reception; at the same time, by building the laser emitting diode and the avalanche photodiode into the lens barrel, the internal structure of the device can be optimized, unnecessary components and space occupation can be reduced, which helps to reduce the size and weight of the device and improve the portability and ease of use of the device; the device can be better adapted to different communication environments and scenarios, such as indoor, outdoor, long-distance or short-distance communication, thereby broadening the application range of the device.

[0062] Specifically, the device also includes a display screen 9 connected to the main control circuit chip, which is arranged above the SDR circuit board. The main control circuit chip is connected to the display screen 9 through a DuPont line; the signal communication end of the SDR circuit board uses an IPEX soft line 8 to connect the signal input ends of the RF switching transmitting chip and the RF switching receiving chip respectively.

[0063] For details, see Figure 6 and Figure 7 , the device also includes a shell, which is a split structure, including an upper cover 19 and a lower shell 20 from top to bottom, the upper cover 19 is provided with a first through hole 21 corresponding to the display screen 9, and a second through hole 22 corresponding to the first lens barrel 16 and the second lens barrel 17 is provided on one side of the lower shell 20 of the shell, and a third through hole 23, a fourth through hole 24 and a fifth through hole 25 are provided on the other side, the third through hole 23 is used to connect to the first USB interface of the host computer, the fourth through hole 24 is used to connect to the battery or the second USB interface of the host computer, and the fifth through hole 25 is used to pass through the transmitting antenna 6-1 and the receiving antenna 6-2. A fixing screw 7 is provided at the boundary position of the lower plate 5 for fixing the device in the inner cavity of the lower shell 20, and the upper cover 19 is fixedly connected to the lower shell 20 by screws; the fixing assembly 2 is an upper fixing plate 10, a lower fixing plate 11, a first auxiliary column 12 and a second auxiliary column 13, wherein the upper fixing plate 10 is tightly connected to the first through the first auxiliary column 12 The upper part of the lens barrel 16 and the second lens barrel 17, and the lower fixing plate 11 are tightly connected to the lower part of the first lens barrel 16 and the second lens barrel 17 through the second auxiliary column 13; the supporting device 4 is four copper columns, fixed between the upper plate 3 and the lower plate 5; the outer shell serves as the external protective layer of the device and adopts a split structure, which is convenient for assembly and maintenance; at the same time, the outer shell can effectively protect the internal circuit boards, optical components and other key components, and prevent external factors such as dust and moisture from damaging them, thereby improving the durability and service life of the device; the first through hole set on the upper cover corresponds to the display screen, which is convenient for users to observe parameters; the design of the fixing component enables the laser transmitting and receiving device to be firmly fixed on the lower plate while maintaining good optical alignment; the device is fixed in the inner cavity of the lower shell by fixing screws, and the upper cover is fixedly connected to the lower shell by screws, which enhances the structural stability of the device and reduces the risk of loosening or damage of internal components due to vibration or impact.

[0064] For details, see Figure 5The first lens barrel 16 and the second lens barrel 17 are respectively connected to a deepened lens barrel 18; the transmitting antenna 6-1 and the receiving antenna 6-2 are both rod-shaped; the deepened lens barrel can extend the transmission path of the laser beam in the lens barrel, thereby enhancing the focusing effect of the laser beam, and at the same time, it can reduce the interference of other light sources indoors and outdoors to ensure transmission quality. For the transmitting end, it helps to form a smaller and more concentrated laser beam, thereby increasing the energy density and transmission distance of the laser. For the receiving end, deepening the lens barrel can more effectively converge the received laser beam, thereby increasing the receiving sensitivity and signal-to-noise ratio of the avalanche photodiode. Both the transmitting antenna and the receiving antenna adopt a rod-shaped design. The rod-shaped antenna has better directivity and gain performance. The transmitting antenna can radiate electromagnetic waves more efficiently and send out the radio frequency signal at a narrower beam angle, thereby increasing the signal transmission distance and penetration ability. The receiving antenna can more effectively receive radio frequency signals from a specific direction, reduce the impact of interference and noise, and improve the signal reception quality and stability. In situations where long-distance communication or communication through obstacles is required, the design of the deepened lens barrel and rod-shaped antenna can provide stronger signal transmission capability and anti-interference ability.

[0065] For details, see Figure 9 The models of the RF switching transmitter chip and the RF switching receiver chip are HMC849ALP4CE. At this time, the first signal terminal is the RFC pin, the second signal terminal is the RF1 pin, the third signal terminal is the RF2 pin, the power supply voltage input terminal is the VDD pin, the control voltage input terminal is the Vctl pin, and the enable terminal is the EN pin; the model of the main control circuit chip is one of Pico and Pico W.

[0066] Based on the same inventive concept, the present invention also provides an SDR-based laser and radio frequency dual-system data communication method. Using the above-mentioned device, when the host computer issues an instruction and the switching device is in wireless radio frequency transmission mode, the second output terminal of the main control circuit chip outputs a low level to the control voltage input terminal of the radio frequency switching transmitting chip and the radio frequency switching receiving chip, turning on the third signal terminal of the radio frequency switching transmitting chip and the radio frequency switching receiving chip, and communicating through the transmitting antenna 6-1 and the receiving antenna 6-2;

[0067] When the host computer issues an instruction and the switching device is in laser transmission mode, the second output end of the main control circuit chip outputs a high level to the control voltage input end of the RF switching transmitting chip and the RF switching receiving chip, turns on the second signal end of the RF switching transmitting chip and the RF switching receiving chip, and communicates through the laser transmitting device and the laser receiving device.

[0068] This method allows users to easily switch communication modes through host computer instructions according to actual needs. Either wireless radio frequency transmission or laser transmission can be selected, which improves the flexibility and adaptability of communication and makes it suitable for more diverse communication scenarios and needs.

[0069] As a specific embodiment of the present invention, when the model of the RF switching transmitting chip and the RF switching receiving chip is HMC849ALP4CE, the host computer sends an instruction, and the method of switching the device to wireless RF transmission mode and laser transmission mode is shown in the table below.

[0070]

[0071] Specifically, when the host computer issues an instruction and the switching device is in a wireless radio frequency transmission mode, communication via the transmitting antenna 6-1 and the receiving antenna 6-2 specifically includes:

[0072] The host computer sends a signal transmission instruction and a signal to be transmitted to the SDR circuit board. The SDR circuit board processes the signal to be transmitted to obtain a processed signal, and transmits the processed signal to the transmitting antenna 6-1 via the signal communication terminal, the first signal terminal, and the third signal terminal of the RF switching transmitting chip in sequence, thereby completing the transmission.

[0073] The host computer sends a signal receiving instruction to the SDR circuit board. The receiving antenna 6-2 transmits the received signal to the signal communication end of the SDR circuit board through the third signal end and the first signal end of the RF switching receiving chip in sequence. The SDR circuit board receives the signal and processes it to obtain the processed signal, and transmits the processed signal to the host computer to complete the reception.

[0074] Specifically, when the host computer issues an instruction and the switching device is in laser transmission mode, communication between the laser emitting device and the laser receiving device specifically includes:

[0075] The host computer sends a signal transmission instruction and a signal to be transmitted to the SDR circuit board. The output voltage of the third output terminal of the main control circuit chip is converted into the operating voltage of the laser emitting device through the level conversion circuit to drive the laser emitting device. The SDR circuit board processes the signal to be transmitted to obtain a processed signal, and transmits the processed signal to the laser emitting device via the signal communication terminal, the first signal terminal, and the second signal terminal of the RF switching transmitting chip in sequence, thereby completing the transmission.

[0076] See also Figure 8, the host computer sends a signal receiving instruction to the SDR circuit board and sets the operating voltage of the laser receiving device at 25°C; obtains the current operating voltage, and reads the current ambient temperature through the temperature sensor, and calculates the current optimal operating voltage of the laser receiving device according to the current ambient temperature. If the current operating voltage is not equal to the current optimal operating voltage, the output resistance of the digital potentiometer is adjusted through the level conversion circuit and the boost circuit until the current operating voltage is equal to the current optimal operating voltage, thereby driving the laser receiving device; the laser receiving device transmits the received signal to the signal communication end of the SDR circuit board through the second signal end and the first signal end of the RF switching receiving chip in sequence. The SDR circuit board receives the signal and processes it to obtain the processed signal, and transmits the processed signal to the host computer to complete the reception.

[0077] At the same time, by writing a program, the display screen displays the current working status (wireless RF transmission / laser transmission), the current ambient temperature, the optimal working voltage of the laser receiving device at the current temperature, and the actual working voltage of the laser receiving device at the current temperature.

[0078] Finally, it should be noted that the embodiments listed above are merely one or more specific manifestations of the technical solution of the present invention. Their purpose is to clearly illustrate the concept, principles, and application of the present invention through specific examples, and is in no way intended to limit the scope of protection of the present invention to these specific embodiments. In fact, the true value of this invention lies in its technical ideas and innovations, not in its form of expression or implementation.

[0079] For ordinary technicians in the relevant technical field, after thoroughly reading and understanding the technical solutions of the present invention, they are fully capable of making various forms of changes, modifications or equivalent replacements to the specific implementation methods of the invention based on their own professional knowledge and skills. These changes may include but are not limited to: adjusting the value range of technical parameters, optimizing algorithm processes to improve efficiency, replacing some technical components to achieve better compatibility or reduce costs, etc. As long as these modified technical solutions still substantially maintain the technical features claimed for protection by the original invention, that is, they can still achieve the core functions and effects of the present invention, then these changes should be deemed to fall within the scope of protection of the pending claims of the present invention.

[0080] Furthermore, with the continuous advancement and development of technology, new technical means and methods continue to emerge, providing ample room for further improvement and perfection of the present invention. Therefore, the scope of protection of the present invention should also include reasonably foreseeable improvements and extensions based on existing technologies. As long as these improvements and extensions do not deviate from the basic principles and core concepts of the present invention, they should be considered equivalent to the present invention and equally protected by patent rights.

Claims

1. A laser and radio frequency dual-system data communication device based on SDR, characterized in that: The invention comprises a main body, a host computer, a transmitting antenna (6-1) and a receiving antenna (6-2), wherein the main body comprises an optical path device (1), an upper plate (3) and a lower plate (5) fixed by a supporting device (4), the optical path device (1) comprises a laser emitting device and a laser receiving device for emitting and receiving signals by laser, the laser emitting device and the laser receiving device are fixed side by side on the lower plate (5) by a fixing component (2), the upper plate (3) is an SDR circuit board, and a first USB interface of the host computer is connected to a power input terminal of the SDR circuit board, for supplying power to the SDR circuit board and for communication; The lower board (5) is provided with a main control circuit chip, a radio frequency switching transmitting chip and a radio frequency switching receiving chip; The signal communication end of the SDR circuit board is respectively connected to the first signal end of the RF switching transmitting chip and the first signal end of the RF switching receiving chip; the third signal end of the RF switching transmitting chip is connected to the transmitting antenna (6-1), and the second signal end of the RF switching transmitting chip is connected to the laser transmitting device; the third signal end of the RF switching receiving chip is connected to the receiving antenna (6-2), and the second signal end of the RF switching receiving chip is connected to the laser receiving device; the first output end of the main control circuit chip is respectively connected to the power supply voltage input end of the RF switching transmitting chip and the RF switching receiving chip, the second output end of the main control circuit chip is respectively connected to the control voltage input end of the RF switching transmitting chip and the RF switching receiving chip, and the enable end of the RF switching transmitting chip and the RF switching receiving chip is grounded, for realizing switching laser and wireless data communication; The power input end of the main control circuit chip is connected to the battery or the second USB interface of the host computer. The third output end of the main control circuit chip is divided into two paths. One path is connected to the laser emitting device through the level conversion circuit to power the laser emitting device. The other path is connected to the laser receiving device through the level conversion circuit, the boost circuit, and the digital potentiometer in sequence to power the laser receiving device. The main control circuit chip is also connected to a temperature sensor for obtaining the current temperature of the laser receiving device.

2. The SDR-based laser and radio frequency dual-system data communication device according to claim 1, characterized in that: A receiving conditioning circuit is provided between the second signal end of the RF switching receiving chip and the laser receiving device, and a transmitting conditioning circuit is provided between the second signal end of the RF switching transmitting chip and the laser transmitting device, which are used for decoupling, filtering and impedance matching to improve signal quality.

3. The SDR-based laser and radio frequency dual-system data communication device according to claim 1, characterized in that: The laser emitting device comprises a first lens barrel (16) and a laser emitting diode (14), wherein the laser emitting diode (14) is built into the first lens barrel (16) and is used to converge the laser beam to be emitted by the laser emitting diode (14); and the laser receiving device comprises a second lens barrel (17) and an avalanche photodiode (15), wherein the avalanche photodiode (15) is built into the second lens barrel (17) and is used to converge the laser beam to be received by the avalanche photodiode (15).

4. The SDR-based laser and radio frequency dual-system data communication device according to claim 1, characterized in that: The device further comprises a display screen (9) connected to a main control circuit chip, which is arranged above the SDR circuit board. The main control circuit chip is connected to the display screen (9) via a DuPont line. The signal communication end of the SDR circuit board is connected to the signal input end of the radio frequency switching transmitting chip and the signal input end of the radio frequency switching receiving chip using an IPEX soft line (8).

5. The SDR-based laser and radio frequency dual-system data communication device according to claim 4, characterized in that: The device further comprises a shell, which is a split structure and comprises an upper cover plate (19) and a lower shell (20) from top to bottom. The upper cover plate (19) is provided with a first through hole (21) corresponding to the display screen (9). One side of the lower shell (20) of the shell is provided with a second through hole (22) corresponding to the first lens barrel (16) and the second lens barrel (17). The other side is provided with a third through hole (23), a fourth through hole (24) and a fifth through hole (25). The third through hole (23) is used to connect to the first USB interface of the host computer, the fourth through hole (24) is used to connect to the battery or the second USB interface of the host computer, and the fifth through hole (25) is used to pass through the transmitting antenna (6-1) and the receiving antenna (6-2). The lower plate ( 5) is provided with a fixing screw (7) at the boundary position for fixing the device in the inner cavity of the lower shell (20), and the upper cover plate (19) is fixedly connected to the lower shell (20) by screws; the fixing assembly (2) comprises an upper fixing plate (10), a lower fixing plate (11), a first auxiliary column (12) and a second auxiliary column (13), wherein the upper fixing plate (10) is tightly connected to the upper part of the first lens barrel (16) and the second lens barrel (17) through the first auxiliary column (12), and the lower fixing plate (11) is tightly connected to the lower part of the first lens barrel (16) and the second lens barrel (17) through the second auxiliary column (13); the supporting device (4) is four copper columns fixed between the upper plate (3) and the lower plate (5).

6. The SDR-based laser and radio frequency dual-system data communication device according to claim 5, characterized in that: The first lens barrel (16) and the second lens barrel (17) are respectively connected to a deepening lens barrel (18); the transmitting antenna (6-1) and the receiving antenna (6-2) are both in the shape of a rod.

7. The SDR-based laser and radio frequency dual-system data communication device according to claim 1, characterized in that: The models of the RF switching transmitter chip and the RF switching receiver chip are HMC849ALP4CE. In this case, the first signal terminal is the RFC pin, the second signal terminal is the RF1 pin, the third signal terminal is the RF2 pin, the power supply voltage input terminal is the VDD pin, the control voltage input terminal is the Vctl pin, and the enable terminal is the EN pin; the model of the main control circuit chip is one of Pico and Pico W.

8. A laser and radio frequency dual-system data communication method based on SDR, characterized in that: Using the device described in any one of claims 1 to 7, When the host computer issues an instruction, the switching device switches to wireless radio frequency transmission mode. The second output terminal of the main control circuit chip outputs a low level to the control voltage input terminal of the radio frequency switching transmitting chip and the radio frequency switching receiving chip, turns on the third signal terminal of the radio frequency switching transmitting chip and the radio frequency switching receiving chip, and communicates through the transmitting antenna (6-1) and the receiving antenna (6-2); When the host computer issues an instruction and the device switches to laser transmission mode, The second output end of the main control circuit chip outputs a high level to the control voltage input end of the RF switching transmitting chip and the RF switching receiving chip, turns on the second signal end of the RF switching transmitting chip and the RF switching receiving chip, and communicates through the laser transmitting device and the laser receiving device.

9. The method of laser and radio frequency dual-system data communication based on SDR according to claim 8, characterized in that: When the host computer issues an instruction and the switching device is in wireless radio frequency transmission mode, communication is carried out through the transmitting antenna (6-1) and the receiving antenna (6-2) specifically including: The host computer sends a signal transmission instruction and a signal to be transmitted to the SDR circuit board. The SDR circuit board processes the signal to be transmitted to obtain a processed signal, and transmits the processed signal to the transmitting antenna (6-1) via the signal communication terminal, the first signal terminal, and the third signal terminal of the radio frequency switching transmitting chip in sequence, thereby completing the transmission. The host computer sends a signal receiving instruction to the SDR circuit board. The receiving antenna (6-2) transmits the received signal to the signal communication end of the SDR circuit board via the third signal end and the first signal end of the RF switching receiving chip in sequence. The SDR circuit board receives the signal and processes it to obtain the processed signal, and transmits the processed signal to the host computer to complete the reception.

10. The method of laser and radio frequency dual-system data communication based on SDR according to claim 8, characterized in that: When the host computer issues an instruction and the device switches to laser transmission mode, communication between the laser emitting device and the laser receiving device specifically includes: The host computer sends a signal transmission instruction and a signal to be transmitted to the SDR circuit board. The output voltage of the third output terminal of the main control circuit chip is converted into the operating voltage of the laser emitting device through the level conversion circuit to drive the laser emitting device. The SDR circuit board processes the signal to be transmitted to obtain a processed signal, and transmits the processed signal to the laser emitting device via the signal communication terminal, the first signal terminal, and the second signal terminal of the RF switching transmitting chip in sequence, thereby completing the transmission. The host computer sends a signal receiving instruction to the SDR circuit board and sets the operating voltage of the laser receiving device at 25°C; obtains the current operating voltage, and reads the current ambient temperature through the temperature sensor, and calculates the current optimal operating voltage of the laser receiving device based on the current ambient temperature. If the current operating voltage is not equal to the current optimal operating voltage, the output resistance of the digital potentiometer is adjusted through the level conversion circuit and the boost circuit until the current operating voltage is equal to the current optimal operating voltage, thereby driving the laser receiving device; the laser receiving device transmits the received signal to the signal communication terminal of the SDR circuit board via the second signal terminal and the first signal terminal of the RF switching receiving chip in sequence. The SDR circuit board receives the signal and processes it to obtain the processed signal, and transmits the processed signal to the host computer to complete the reception.

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