Piercing and sucking type pest vibration interference equipment and ultrasonic audio frequency orientation system thereof

Abstract

The invention relates to the technical field of pest control, and particularly discloses piercing-sucking type pest vibration interference equipment and an ultrasonic audio frequency orientation system thereof, the piercing-sucking type pest vibration interference equipment comprises an upper fixing plate and a lower fixing plate which are of an arc-shaped structure, and a vibration interference unit is fixedly installed between the upper fixing plate and the lower fixing plate. According to the piercing-sucking type pest vibration interference equipment and the ultrasonic audio frequency orientation system thereof, low-frequency interference signals and ultrasonic carrier signals are modulated on the basis of frequency spectrum characteristics of target pest interference signals, modulated ultrasonic signals are sent out through an energy converter (namely an orientation player) in the vibration interference unit, and then the target pest interference signals are sent out. The ultrasonic waves are self-demodulated into high-directivity interference signals in the air, and the interference signals are accurately transmitted to the edge position or the irregular dead angle area of the field, so that the interference signals of an omnidirectional player in the field are prevented from being attenuated to be invalid when reaching the edge position or the dead angle area of the field; the two players are matched with each other, so that the power of the internal omnidirectional player does not need to be greatly improved, and noise pollution is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of pest control, and specifically to a vibration interference device for piercing-sucking pests and its ultrasonic audio frequency direction system. Background Art

[0002] Piercing-sucking pests are one of the most destructive pest groups in agriculture and horticulture. They feed by piercing plant tissues (leaves, stems, fruits, etc.) and sucking the sap. The common feature of these pests is that they have specialized piercing-sucking mouthparts, directly sucking the sap from the phloem or xylem of plants, resulting in plants lacking nutrients, withering of buds and leaves, and spreading plant diseases. Many piercing-sucking pests communicate information through vibration signals transmitted through the substrate. After research, these pests can disrupt intra-species information communication through vibration interference to achieve the purpose of controlling them.

[0003] For example, in the prior art, the Chinese patent with the application number CN202011514706.1 discloses a method for driving or interfering with pests by using a buried vibration source, including the following steps: (1) determining the target insects, and the target insects complete intra-species communication through one or more vibration waves; here, insects usually achieve courtship through vibration waves; (2) burying the vibration source underground; the burial depth is not limited; (3) sending interference vibration waves only targeting the target insects to the plants, and the vibration waves reach the target insects on the plants from the vibration source through the soil and the plant body in the form of solid medium transmission, so as to achieve at least one of the following purposes: making the target insects leave the plant body; obstructing courtship between target insects through a certain vibration wave; interfering with information exchange between target insects through a certain vibration wave.

[0004] Again, in the prior art, the Chinese patent with the application number CN202310322722.8 discloses a method for detecting the effectiveness of vibration interference signals in controlling rice planthoppers. The method mainly evaluates by measuring the vibration intensity (vibration velocity) of the vibration interference signals emitted by the insect vibration signal interference device at the base of the main stem of rice; the present invention also relates to a system for detecting the effectiveness of vibration interference signals in controlling rice planthoppers, including the insect vibration signal interference device to be tested, rice plants from tillering stage to booting stage, a vibration measuring instrument, and a scale; by collecting the vibration velocity data at the base of the stems of rice plants at different positions to judge whether the parameter settings of the interference device effectively interfere with rice planthoppers.

[0005] Combined with the above materials, it can be seen that in the prior art, the method of using vibration wave stimulation can be adopted to achieve the purpose of interfering with the behavior of pests. However, in the actual use process, omnidirectional speakers or exciters are generally used in the field to play sound waves. When the sound waves are transmitted to the edge of the field, the intensity needs to be attenuated to below 40 dB (required by the national environmental protection standard). At this time, the reproduction intensity of the interference signal on the leaves or stems of the crops at the edge of the field cannot reach the effective intensity threshold that affects the behavior of the target pests. However, if the sound wave intensity is increased, it will cause relatively serious noise pollution to the surrounding environment of the field. Summary of the Invention

[0006] The purpose of the present invention is to provide a vibration interference device for piercing-sucking pests and its ultrasonic audio directional system, which cooperates with an omnidirectional speaker to construct an effective sound field of the interference signal for the target pests in the field, so as to solve the problem that the omnidirectional speaker has poor sound wave propagation directivity in the above-mentioned background technology, and the sound wave (interference signal) cannot effectively cover the edge of the field or irregular dead corners under the condition of meeting the environmental protection requirements.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: A vibration interference device for piercing-sucking pests, including an upper fixing plate and a lower fixing plate in an arc structure. A vibration interferer is fixedly installed between the upper fixing plate and the lower fixing plate. An omnidirectional player is installed inside the vibration interferer. A transducer is fixedly installed on the outer surface of the vibration interferer. The transducer is a circular piston transducer. A control box is fixedly installed on the upper surface of the lower fixing plate, and the control box is connected to the vibration interferer by a connecting wire; A support base for supporting the whole device is arranged below the lower fixing plate. Moving rollers are rotatably installed on the side surface of the support base. A support column is arranged between the support base and the lower fixing plate, and an adjusting mechanism is arranged outside the support column.

[0008] Preferably, a storage battery for supplying power to it is fixedly installed above the control box, and the storage battery is connected to a solar panel, and the solar panel is fixedly installed on the upper surface of the upper fixing plate.

[0009] Preferably, a heat dissipation fan is installed on the side surface of the control box, and a heat dissipation air duct is formed between the heat dissipation fan and a heat dissipation slot opened inside the rear cover plate.

[0010] Preferably, the adjusting mechanism includes a limit sleeve slidably installed outside the support column. The limit sleeve is fixedly installed with an adjusting slider through a connecting plate installed outside it. The adjusting slider is fixedly connected to the lower fixing plate through a support plate installed outside it.

[0011] Preferably, an adjusting threaded rod is rotatably installed on the upper surface of the support column. The adjusting threaded rod is threadedly connected through the adjusting slider, and a rotating handle is coaxially fixedly installed at the top of the adjusting threaded rod.

[0012] An ultrasonic audio frequency directional system for a vibration interference device for piercing and sucking pests, comprising an ultrasonic audio frequency directional propagation system and an interference signal preprocessing algorithm. The theoretical basis for signal processing in the ultrasonic audio frequency directional propagation system is the KZK equation and its analytical solution. The KZK equation is used for the simulation and verification of the nonlinear sound field of a directional speaker. The expression of the KZK equation is as follows:

[0013]

[0014] In the formula: z is the propagation distance of the sound wave along the sound beam axis, p is the sound pressure, c is the speed of sound, τ is the delay time, δ is the sound scattering degree, β is the nonlinear coefficient, and ρ is the air density.

[0015] Preferably, in the ultrasonic audio frequency directional propagation system, sound waves are directly emitted by a circular piston transducer. The directivity function of the circular piston transducer is:

[0016]

[0017] Among them, the directivity of the circular piston transducer is related to the radius of the effective vibration surface.

[0018] Preferably, the interference signal preprocessing algorithm adopts an improved AM modulation method. On the basis of the DSB method, it draws on the development principle of the square root method to reduce the sound distortion of the DSB method.

[0019] Preferably, the output of the improved AM modulation method is:

[0020] .

[0021] Preferably, the ultrasonic audio frequency directional propagation system further includes a control processing circuit, a data communication circuit, a power supply circuit, a watchdog circuit, a U disk interface circuit, a serial port signal circuit, a storage circuit, and a power amplification circuit;

[0022] The control processing circuit uses a domestic processing chip GD32F470ZIT6;

[0023] The data communication circuit uses an EC04-DGC4GM QTT communication module, which supports the Cat1 network access of the three major operators and has a combined positioning function of GPS / Beidou at the same time;

[0024] The watchdog circuit automatically restores the system to its normal working state without human intervention in case of system crashes caused by potential errors in some programs or interference in harsh environments;

[0025] The U disk interface circuit uses the host mode of the USB full-speed interface of the GD32F470ZIT6 processing chip;

[0026] The driving chip CH340N used in the serial communication circuit is a USB bus transfer chip, which realizes USB to serial port conversion;

[0027] The storage circuit includes SDRAM and SDNAND, where SDRAM is a synchronous dynamic random access memory, and SDNAND is an extension of the memory card.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: The piercing-sucking pest vibration interference device and its ultrasonic audio beamforming system adopt a novel structural design, and the specific content is as follows:

[0029] 1. The vibration of the vibration interferer transducer (i.e., the directional player) emits a modulated ultrasonic signal. The ultrasonic wave self-demodulates a highly directional interference signal in the air, and accurately transmits the interference signal to the edge position of the field, avoiding the attenuation of the signal of the omnidirectional player inside the field to an ineffective level when reaching the edge position of the field, or being unable to cover irregular dead corners. By using the cooperation of the two players, it is not necessary to greatly increase the power of the internal omnidirectional player, thus avoiding noise pollution;

[0030] Furthermore, a solar panel is fixed on the upper surface of the upper fixing plate of the device. The solar panel absorbs sunlight and converts it into electric energy, and the electric energy is stored by the storage battery inside the device, achieving the purpose of energy conservation and environmental protection;

[0031] Even further, by rotating the handle to drive the adjustment screw rod to rotate, the adjustment slider threadedly installed outside the adjustment screw rod is driven to move up and down, so that the adjustment slider drives the device to move up and down as a whole, achieving the purpose of adjusting the height, so that the device can be adapted to crops of different heights.

[0032] 2. The ultrasonic audio beamforming system generates multiple frequency ultrasonic signals with good directivity through ultrasonic transducers, propagates along the specified direction, and then multiple frequency ultrasonic signals generate multiple frequency signals through non-linear interaction during the propagation process and continuously strengthen. Among them, the high-frequency signals will attenuate with the increase of the propagation distance, and finally only the low-frequency audible sound signals enter the listener's ears;

[0033] Furthermore, during the use of the device, on the basis of the interference signal preprocessing algorithm DSB method using the improved AM modulation method, drawing on the development principle of the square root method, an improved amplitude modulation (AM) method is proposed to reduce the sound distortion of the DSB method and provide an achievable limited signal bandwidth, solving the problems of large distortion of the DSB method and the requirement of infinite bandwidth for the square root method. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall front structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the overall back structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the solar panel structure of the present invention;

[0037] Figure 4 This is a schematic diagram of the control box structure of the present invention;

[0038] Figure 5 This is a schematic diagram of the support base structure of the present invention;

[0039] Figure 6 This is the present invention Figure 5 The enlarged structure schematic diagram at position A in;

[0040] Figure 7 This is the schematic diagram of the improved AM modulation method of the present invention;

[0041] Figure 8 This is the distortion percentage of different modulation methods of the present invention;

[0042] Figure 9 This is the data communication circuit diagram of the present invention;

[0043] Figure 10 This is the watchdog circuit diagram of the present invention;

[0044] Figure 11 This is the USB flash drive interface circuit diagram of the present invention;

[0045] Figure 12 This is the serial communication circuit diagram of the present invention;

[0046] Figure 13 This is the power amplifier circuit diagram of the present invention.

[0047] In the figure: 1. Upper fixing plate; 2. Lower fixing plate; 3. Vibration interferer; 4. Transducer; 5. Control box; 6. Connecting wire; 7. Storage battery; 8. Solar panel; 9. Cooling fan; 10. Rear cover plate; 11. Cooling slot; 12. Support base; 13. Moving roller; 14. Support column; 15. Limiting sleeve; 16. Connecting plate; 17. Adjusting slider; 18. Adjusting screw rod; 19. Rotating handle; 20. Support plate. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] Embodiment 1: Please refer to Figures 1-6 , in this embodiment, a vibration interference device for piercing-sucking pests includes an upper fixing plate 1 and a lower fixing plate 2 with an arc-shaped structure. A vibration interferer 3 is fixedly installed between the upper fixing plate 1 and the lower fixing plate 2 (the number of interferers is not limited to 6. 6 interferers cover 180 degrees and emit sound waves inward. If the field is rectangular, if the directional speaker is on the edge, 6 interferers can be selected; if the directional speaker is in the corner, 3 interferers can be selected to cover 90 degrees). A transducer 4 is fixedly installed on the outer surface of the vibration interferer 3. The transducer 4 is a circular piston transducer. A control box 5 is fixedly installed on the upper surface of the lower fixing plate 2, and the control box 5 is connected to the vibration interferer 3 by a connecting wire 6. A support base 12 for supporting the whole device is arranged below the lower fixing plate 2. A moving roller 13 is rotatably installed on the side of the support base 12. A support column 14 is arranged between the support base 12 and the lower fixing plate 2. An adjusting mechanism is arranged outside the support column 14. A storage battery 7 for supplying power to it is fixedly installed above the control box 5, and the storage battery 7 is connected to a solar panel 8. The solar panel 8 is fixedly installed on the upper surface of the upper fixing plate 1. A heat dissipation fan 9 is installed on the side of the control box 5, and a heat dissipation air duct is formed between the heat dissipation fan 9 and a heat dissipation slot 11 opened inside the rear cover plate 10. The adjusting mechanism includes a limit sleeve 15 slidably installed outside the support column 14. The limit sleeve 15 is fixedly installed with an adjusting slider 17 through a connecting plate 16 installed on its outer part. The adjusting slider 17 is fixedly connected to the lower fixing plate 2 through a support plate 20 installed on its outer part. An adjusting threaded rod 18 is rotatably installed on the upper surface of the support column 14. The adjusting threaded rod 18 is threadedly connected through the adjusting slider 17, and a rotating handle 19 is coaxially fixedly installed at the top of the adjusting threaded rod 18.

[0050] When using the device, first use the moving roller 13 to push the device to the designated position in the field. Then, rotate the adjusting screw rod 18 by turning the handle 19. During the rotation of the adjusting screw rod 18, the adjusting slider 17 installed through the external threaded part moves up and down (during this process, the limiting sleeve 15 slides on the outside of the support column 14, and the rotation of the adjusting slider 17 is restricted by the limiting sleeve 15, so that the adjusting slider 17 can slide up and down in sequence). During the up and down movement of the adjusting slider 17, the overall height of the device is adjusted through the connecting plate 16. Then, turn on the power supply of the device (during daily use, the solar panel 8 converts sunlight into electric energy and stores it in the storage battery 7). At this time, the transducer 4 on the outer surface of the vibration interferer 3 vibrates to emit ultrasonic signals to interfere with the behavior of pests (the interference signals played by the omnidirectional speakers inside the field are severely attenuated when transmitted to the edge of the field. The vibration interferer 3 plays interference signals directionally from the edge of the field to the inner side or dead corner areas to compensate for the attenuated interference signals and construct an effective sound field of the target pest interference signals covering the entire field without causing noise pollution to the surrounding areas of the field). During the use of the device, turn on the cooling fan 9 on the side of the control box 5, and cooperate with the heat dissipation slots 11 opened in the rear cover plate 10 to achieve the purpose of overall heat dissipation of the device.

[0051] Embodiment 2: Please refer to Figures 7-13 , in this embodiment, a vibration interference device for piercing-sucking pests, the theoretical basis for the signal processing of the ultrasonic audio frequency directional propagation system is the KZK equation and its analytical solution. The KZK equation is used for the simulation verification of the nonlinear sound field of the directional speaker. The expression of the KZK equation is:

[0052]

[0053] In the formula: z is the propagation distance of the sound wave along the sound beam axis, p is the sound pressure, c is the sound speed, τ is the delay time, δ is the sound scattering degree, β is the nonlinear coefficient, and ρ is the air density. Using the KZK equation for sound field modeling in parametric acoustics, the obtained parametric array theoretical model will be more accurate than the Westervelt equation and the "Berktay far-field solution", which is a huge progress for audio frequency directional signal processing.

[0054] In the ultrasonic audio frequency directional propagation system, sound waves are directly emitted by a circular piston transducer. The directivity function of the circular piston transducer is:

[0055]

[0056] The directivity expression of the sound wave emitted by a circular piston transducer. When the wavelength of the audible sound emitted is fixed, the directivity of the sound field is determined by the radius of the effective vibration surface of the transducer. As shown, when the frequency of the emitted sound wave is f = 3 kHz, the directivity diagrams of a point source and a single transducer with radii R = 50 mm and 200 mm are presented. It can be seen that the sound field of the point source is the same in different deflection angle directions, indicating that the sound field of the point source has no directivity. While the transducer with a certain vibration area has obvious directivity, and the larger the vibration surface, the more obvious the directivity. On the other hand, once the vibration area of the transducer is determined, the directivity of its radiation sound field is determined by the wavelength of the emitted sound wave. From the directivity diagrams when the radius of the effective vibration surface of the transducer and the sound generation frequencies are 1 kHz, 4 kHz, and 8 kHz respectively, it can be seen that once the transducer is determined, the directivity becomes more obvious as the sound generation frequency increases.

[0057] Based on the DSB method and drawing on the development principle of the square root method, an improved amplitude modulation (AM) method is proposed to reduce the sound distortion of the DSB method and provide an achievable finite signal bandwidth, solving the problems of large distortion in the DSB method and the requirement for an infinite bandwidth in the square root method. Considering that the second harmonic component is relatively large in the DSB method, to reduce this harmonic component, the square operation in the Berktay far-field solution is carried out using the properties of trigonometric functions;

[0058] When the carrier frequency is 25 kHz and the highest frequency of the bionic interference signal is taken as 2 kHz, the signal bandwidth requirement for this improved AM method is 21 - 29 kHz, which can be fully realized using an actual physical system.

[0059] The output of the improved AM modulation method is:

[0060]

[0061] In the formula:

[0062]

[0063] Taking f(t) = sinωt, we can obtain:

[0064]

[0065] The first term in the brackets is the input audible sound, which is the useful signal, and the second and third terms are both harmonic distortions.

[0066] Compared with DSB and SSB modulations, the harmonic distortion of the improved AM modulation algorithm is reduced a lot. However, in the case of a relatively large modulation coefficient, the harmonic distortion of AM modulation is still relatively serious. Considering the output power problem of the parametric array loudspeaker, a relatively large modulation coefficient is generally used. In this case, further preprocessing of the input signal is still required.

[0067] The ultrasonic audio directional propagation system also includes a control and processing circuit, a data communication circuit, a power supply circuit, a watchdog circuit, a USB flash drive interface circuit, a serial port signal circuit, a storage circuit, and a power amplifier circuit;

[0068] The control and processing circuit uses a domestic processing chip GD32F470ZIT6, which has floating-point operation function, low

[0069] interrupt latency time and low-cost debugging characteristics. The high integration and enhanced characteristics make this chip suitable for market fields that require high-performance and low-power microcontrollers;

[0070] The data communication circuit uses an EC04-DGC4GM QTT communication module, which supports the Cat1 network access of the three major operators and has the combined positioning function of GPS / Beidou at the same time;

[0071] The watchdog circuit automatically restores the system to its normal working state without human intervention in case of system crashes caused by some potential program errors or interference in harsh environments. The P706 watchdog circuit can monitor the power supply voltage and provide a power-on reset signal. If VP706 is not fed within 1.6 seconds, it will output a reset signal to restart the system. This reset can also be achieved by manually pressing the SW1 key. In addition, VP706 internally provides a power failure detector with a 1.25V threshold to monitor the externally input power supply voltage. When the external power supply fails, it can timely provide a power failure detection signal to the control and processing chip GD32F470ZIT6, enabling it to quickly save important parameters and data during system operation;

[0072] The USB flash drive interface circuit uses the host mode of the USB full-speed interface of the GD32F470ZIT6 processing chip; the driver chip CH340N used in the serial communication circuit is a USB bus transfer chip that realizes USB to serial port;

[0073] The storage circuit includes SDRAM and SDNAND, where SDRAM is a synchronous dynamic random access memory and SDNAND is an extension of the memory card.

[0074] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration interference device for piercing-sucking pests, comprising an upper fixing plate (1) and a lower fixing plate (2) with an arc-shaped structure, characterized in that: A vibration interferer (3) is fixedly installed between the upper fixing plate (1) and the lower fixing plate (2). An omnidirectional player is installed inside the vibration interferer (3). A transducer (4) is fixedly installed on the outer surface of the vibration interferer (3). The transducer (4) is a circular piston transducer. A control box (5) is fixedly installed on the upper surface of the lower fixing plate (2), and the control box (5) is connected to the vibration interferer (3) by a connecting wire (6); A support base (12) for supporting the whole device is arranged below the lower fixing plate (2). A moving roller (13) is rotatably installed on the side of the support base (12). A support column (14) is arranged between the support base (12) and the lower fixing plate (2), and an adjusting mechanism is arranged outside the support column (14).

2. The vibration interference device for piercing-sucking pests according to claim 1, characterized in that: A storage battery (7) for supplying power to it is fixedly installed above the control box (5). The storage battery (7) is connected to a solar panel (8), and the solar panel (8) is fixedly installed on the upper surface of the upper fixing plate (1).

3. The vibration interference device for piercing-sucking pests according to claim 2, characterized in that: A heat dissipation fan (9) is installed on the side of the control box (5), and a heat dissipation air duct is formed between the heat dissipation fan (9) and a heat dissipation slot (11) formed inside the rear cover plate (10).

4. The vibration interference device for piercing-sucking pests according to claim 1, characterized in that: The adjusting mechanism includes a limit sleeve (15) slidably installed outside the support column (14). The limit sleeve (15) is fixedly installed with an adjusting slider (17) through a connecting plate (16) installed outside it. The adjusting slider (17) is fixedly connected to the lower fixing plate (2) through a support plate (20) installed outside it.

5. The vibration interference device for piercing-sucking pests according to claim 4, wherein: An adjusting threaded rod (18) is rotatably installed on the upper surface of the support column (14). The adjusting threaded rod (18) is threadedly connected through the adjusting slider (17), and a rotating handle (19) is coaxially fixedly installed at the top of the adjusting threaded rod (18).

6. An ultrasonic audio frequency directional system for a vibration interference device of piercing-sucking pests, characterized in that: It includes an ultrasonic audio directional propagation system and an interference signal preprocessing algorithm. The theoretical basis for signal processing of the ultrasonic audio directional propagation system is the KZK equation and its analytical solution. The KZK equation is used for simulation verification of the nonlinear sound field of a directional speaker. The expression of the KZK equation is: ； In the formula: z is the propagation distance of the sound wave along the sound beam axis, p is the sound pressure, c is the sound speed, τ is the delay time, δ is the sound scattering degree, β is the nonlinear coefficient, and ρ is the air density.

7. The ultrasonic audio frequency directional system of a vibration interference device for piercing-sucking pests according to claim 6, characterized in that: In the ultrasonic audio directional propagation system, sound waves are directly emitted by a circular piston transducer. The directivity function of the circular piston transducer is: ； The directivity of the circular piston transducer is related to the radius of the effective vibration surface.

8. The method of using the ultrasonic audio frequency direction system of a vibration interference device for piercing-sucking pests according to claim 6, characterized in that, The interference signal preprocessing algorithm adopts an improved AM modulation method. On the basis of the DSB method, it draws on the development principle of the square root method to reduce the sound distortion of the DSB method.

9. The method of using the ultrasonic audio frequency directional system of a vibration interference device for piercing-sucking pests according to claim 8, characterized in that, The output of the improved AM modulation method is: 。 10. The method of using the ultrasonic audio frequency directional system of a vibration interference device for piercing-sucking pests according to claim 6, characterized in that The ultrasonic audio directional propagation system also includes a control processing circuit, a data communication circuit, a power supply circuit, a watchdog circuit, a U disk interface circuit, a serial port signal circuit, a storage circuit, and a power amplification circuit; The control and processing circuit uses a domestic processing chip GD32F470ZIT6; The data communication circuit uses an EC04-DGC4GM QTT communication module, which supports the Cat1 network access of the three major operators and has the combined positioning function of GPS / Beidou at the same time; The watchdog circuit automatically restores the system to its normal working state without human intervention in case of system crashes caused by potential errors in some programs or interference in harsh environments; The USB flash drive interface circuit uses the host mode of the USB full-speed interface of the GD32F470ZIT6 processing chip; The driver chip CH340N used in the serial communication circuit is a USB bus transfer chip that realizes USB to serial port conversion; The storage circuit includes SDRAM and SDNAND, where SDRAM is a synchronous dynamic random access memory and SDNAND is an extension of the memory card.

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