Unmanned aerial vehicle three-wire mooring cable

Abstract

The utility model discloses a three-wire mooring cable for an unmanned aerial vehicle, which comprises an anode high-voltage cable, a cathode high-voltage cable, a low-voltage cable and a signal transmission module, and is characterized in that one end of the anode high-voltage cable, one end of the cathode high-voltage cable and one end of the low-voltage cable are all connected to the ground end; the other end of the positive high-voltage cable, the other end of the negative high-voltage cable and the other end of the low-voltage cable are all connected to the sky end, the low-voltage cable is further connected with the signal transmission module, the positive high-voltage cable and the negative high-voltage cable are used for transmitting high-voltage power, the low-voltage cable is used for transmitting low-voltage signals, and the signal transmission module is connected with the signal transmission module. The signal transmission module includes a plurality of discrete components. According to the utility model, a wired cable is adopted for transmission, external wireless interference signals can be well resisted, the application of chips in the signal transmission module is reduced, a plurality of discrete components are adopted, the circuit board can be simplified, the failure rate can be reduced, the computing power can be reduced, and the signal transmission module can be widely applied to the technical field of signal transmission.

Description

Technical Field

[0001] This utility model relates to the field of signal transmission technology, and in particular to a three-line tethering cable for unmanned aerial vehicles. Background Technology

[0002] Currently, tethered cables are primarily high-voltage cables used only for power transmission, commonly 400V and 800V; these cables typically consist of two wires: a positive terminal and a negative terminal. Signal transmission between the overhead and tethered ground-based devices primarily utilizes power line carrier and wireless transmission methods. Power line carrier and wireless transmission methods have the following drawbacks:

[0003] 1) Power line carrier: Using power line carrier increases the complexity of the circuit boards at both the transmitting and receiving ends. Both the transmitting and receiving ends must use signal processing chips (two chips) that are compatible with power line carrier. This places high demands on the hardware computing power of the receiving end and increases the overall cost and the size of the circuit board. In addition, since power line carrier transmits network data, its reliability is at risk. When a device with a network interface malfunctions, communication will be interrupted.

[0004] 2) Wireless Transmission: Using wireless transmission requires additional signal processing chips on both the transmitting and receiving circuit boards, increasing costs; it also carries the risk of signal delay and has poor resistance to electromagnetic interference. It is less resistant to the increasing number of wireless anti-drone devices emerging. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a three-line tether cable for drones that can resist external signal interference and reduce computing power.

[0006] The technical solution adopted by this utility model is:

[0007] A three-wire tethered cable for unmanned aerial vehicles (UAVs) includes a positive high-voltage cable, a negative high-voltage cable, a low-voltage cable, and a signal transmission module. One end of each of the positive, negative, and low-voltage cables is connected to the ground, and the other end is connected to the sky. The low-voltage cable is also connected to the signal transmission module. The positive and negative high-voltage cables are used to transmit high-voltage electricity, and the low-voltage cable is used to transmit low-voltage signals. The signal transmission module includes multiple discrete components.

[0008] In some embodiments, the signal transmission module includes a signal transmitting module located at the ground end, and the input end of the low-voltage cable is connected to the output end of the signal transmitting module.

[0009] In some embodiments, the signal transmission module comprises a signal receiving module, the signal receiving module is located at the sky end, and an output end of the low-voltage cable is connected to an input end of the signal receiving module.

[0010] In some embodiments, the signal transmission module comprises a main control circuit, a coupling circuit, and a switch circuit, an output end of the main control circuit is connected to an input end of the coupling circuit, an output end of the coupling circuit is connected to a first input end of the switch circuit, and an output end of the switch circuit is connected to an input end of the low-voltage cable.

[0011] In some embodiments, the coupling circuit comprises a photoelectric coupler, the switch circuit comprises a field effect tube, a positive electrode of the photoelectric coupler is connected to an output end of the main control circuit, a collector of the photoelectric coupler is connected to a gate of the field effect tube, and a negative electrode and an emitter of the photoelectric coupler are grounded.

[0012] In some embodiments, the signal transmission module further comprises a power supply port, an output end of the power supply port is connected to a drain of the field effect tube.

[0013] In some embodiments, the signal transmission module further comprises a wiring port, an input end of the wiring port is connected to a source of the field effect tube, and an output end of the wiring port is connected to an input end of the low-voltage cable.

[0014] In some embodiments, the signal transmission module further comprises a protection circuit, the protection circuit is connected between the source of the field effect tube and the input end of the wiring port.

[0015] In some embodiments, the main control circuit comprises a main control chip and a filter circuit, an output end of the main control chip is connected to an input end of the coupling circuit, and the filter circuit is connected to the main control chip.

[0016] In some embodiments, the signal receiving module comprises a first resistor, the first resistor is connected to an output end of the low-voltage cable.

[0017] The utility model discloses a beneficial effect is: the utility model discloses unmanned aerial vehicle three line mooring cable including positive high voltage cable, negative high voltage cable, low voltage cable and signal transmission module, through positive high voltage cable and negative high voltage cable transmission high voltage power, through low voltage cable transmission low voltage signal, wherein signal transmission module includes a plurality of discrete components. The utility model discloses one aspect between the sky end and ground end of mooring unmanned aerial vehicle, increase a low voltage cable transmission low voltage signal, and through signal transmission module carries out signal sending and receiving, adopts wired cable transmission, can concentrate signal energy in copper wire interior, thereby betterly resist external wireless interference signal, on the other hand, reduce the application of chip in signal transmission module, change a plurality of discrete components, thereby reduce the computing power, and simplify circuit board, reduce the failure rate. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiment of the present application, the following introduces the drawings needed to be used in the embodiment of the present application as follows, it should be understood that the drawings in the following introduction only for the convenience of clearly expressing part of the embodiment in the technical scheme of the present application, for the person skilled in the art, without paying the creative labor, can also obtain other drawings according to these drawings.

[0019] Figure 1 The utility model provides a kind of unmanned aerial vehicle three line mooring cable structure schematic view;

[0020] Figure 2 The utility model provides cable structure diagram;

[0021] Figure 3 The utility model provides the structure schematic view of signal sending module;

[0022] Figure 4 The utility model provides the circuit schematic diagram of main control chip;

[0023] Figure 5 The utility model provides the circuit schematic diagram of filter circuit;

[0024] Figure 6 The utility model provides the circuit schematic diagram of coupling circuit and switch circuit.

[0025] Signs: 101, positive high voltage cable;102, negative high voltage cable;103, low voltage cable;U31, main control chip;C20, first capacitor;C21, second capacitor;C67, third capacitor;U37, photoelectric coupler;Q6, field effect tube;CN17, wiring port;D13, diode. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0027] The current tethered cable is basically a high-voltage cable used only for power transmission, and the common voltages are 400V and 800V. The composition of the cable is basically two wires: positive and negative. The signal transmission between the sky end and the tethered ground end device is basically carried out in the mode of power carrier and wireless transmission. The transmission signals of power carrier and wireless transmission have the following shortcomings:

[0028] 1) Power carrier: using the power carrier mode increases the complexity of the transmitting end and receiving end circuit boards, and both the transmitting end and the receiving end must use the signal processing chip (two chips) matched with the power carrier, which requires high hardware computing power of the receiving end and increases the overall cost and the size of the circuit board. In addition, since the power carrier is network data transmission, its reliability is at risk, and when a device with a network interface has a problem, the communication is interrupted.

[0029] 2) Wireless transmission: using the wireless transmission mode requires additional signal processing chips for the transmitting end and receiving end circuit boards, increasing the cost; at the same time, there is a risk of signal delay and poor anti-electromagnetic interference ability. In the face of the increasing number of wireless anti-drone devices, the resistance is poor.

[0030] Therefore, the embodiments of the present application propose a three-wire tethered cable for unmanned aerial vehicles, which comprises a positive high-voltage cable, a negative high-voltage cable, a low-voltage cable and a signal transmission module. High-voltage power is transmitted through the positive high-voltage cable and the negative high-voltage cable, and low-voltage signals are transmitted through the low-voltage cable, wherein the signal transmission module comprises a plurality of discrete elements. On the one hand, the present application increases a low-voltage cable to transmit low-voltage signals between the sky end and the ground end of the tethered unmanned aerial vehicle, and transmits and receives signals through the signal transmission module, and transmits signals through a wired cable, which can concentrate signal energy inside the copper wire, thereby better resisting external wireless interference signals. On the other hand, the application of chips in the signal transmission module is reduced, and a plurality of discrete elements are used instead, thereby reducing computing power, simplifying the circuit board and reducing the failure rate.

[0031] Referring to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a three-wire tethered cable for unmanned aerial vehicles, Figure 2For the cable structure diagram, a three-wire mooring cable of unmanned aerial vehicle includes positive high-voltage cable 101, negative high-voltage cable 102, low-voltage cable 103 and signal transmission module, one end of positive high-voltage cable 101, negative high-voltage cable 102 and low-voltage cable 103 is connected to ground end, the other end of positive high-voltage cable 101, negative high-voltage cable 102 and low-voltage cable 103 is connected to sky end, low-voltage cable 103 is also connected with signal transmission module, positive high-voltage cable 101 and negative high-voltage cable 102 are used for transmitting high-voltage power, and low-voltage cable 103 is used for transmitting low-voltage signal, wherein the signal transmission module comprises a plurality of discrete elements.

[0032] Specifically, the positive high-voltage cable 101 and the negative high-voltage cable 102 are used for transmitting high-voltage power, and the low-voltage cable 103 is used for transmitting low-voltage signal.

[0033] The discrete elements refer to single electronic elements such as ordinary resistors, capacitors and transistors.

[0034] It should be noted that, in the embodiment of the utility model, the signal transmission is carried out through the wired cable, the signal energy can be concentrated in the copper wire, and the external wireless interference signal can be better resisted.

[0035] Referring to Figure 1 Further, as an optional embodiment, the signal transmission module comprises a signal sending module, the signal sending module is located at the ground end, and the input end of the low-voltage cable 103 is connected with the output end of the signal sending module.

[0036] Referring to Figure 1 Further, as an optional embodiment, the signal transmission module comprises a signal receiving module, the signal receiving module is located at the sky end, and the output end of the low-voltage cable 103 is connected with the input end of the signal receiving module.

[0037] Specifically, in the embodiment of the utility model, unidirectional sending and receiving are adopted, the ground end is the signal sending end, the sky end is the signal receiving end of the moored unmanned aerial vehicle, the signal sending module is arranged at the ground end (i.e. the sending end) and connected with the input end of the low-voltage cable 103, and the signal receiving module is arranged at the sky end (i.e. the receiving end) and connected with the output end of the low-voltage cable 103, so that the low-voltage signal of the low-voltage cable 103 can be sent and received in real time.

[0038] Referring to Figure 3 , Figure 3 is a structural schematic diagram of the signal sending module, and further as an optional implementation, the signal sending module includes a master control circuit, a coupling circuit, and a switching circuit, an output end of the master control circuit is connected with an input end of the coupling circuit, an output end of the coupling circuit is connected with an input end of the switching circuit, and an output end of the switching circuit is connected with an input end of the low-voltage cable 103.

[0039] Specifically, the master control circuit is configured to output a high-low level signal in a digital form, and output the high-low level signal to the coupling circuit through the output end, so as to control the on-off of the coupling circuit.

[0040] The coupling circuit is configured to convert the high-low level signal generated by the master control circuit into a control signal, and transmit the control signal to the switching circuit, so as to realize the transmission of the signal.

[0041] The switching circuit is configured to control the on-off of the low-voltage cable 103 according to the control signal transmitted by the coupling circuit, when the signal transmitted by the coupling circuit makes the switching circuit conductive, a path is formed between the low-voltage cable 103 and the power supply or the ground, so as to allow the signal to be transmitted to the signal receiving module at the sky end through the low-voltage cable 103.

[0042] Referring to Figure 4 and Figure 5 , Figure 4 is a circuit principle diagram of the master control chip, Figure 5 is a circuit principle diagram of the filter circuit, and further as an optional implementation, the master control circuit includes a master control chip U31 and a filter circuit, and the filter circuit is connected with the master control chip U31.

[0043] Specifically, the master control chip U31 is configured to output a high-low level signal in a digital form, and output the high-low level signal to the coupling circuit through a GPIO pin.

[0044] The filter circuit is configured to filter out the clutter in the circuit, so as to make the master control chip U31 work stably, and the filter circuit includes a first capacitor C20, a second capacitor C21, and a third capacitor C67, the first capacitor C20, the second capacitor C21, and the third capacitor C67 are connected in parallel, and one end is connected to a 3.3V master control chip U31 power supply output end, and the other end is grounded.

[0045] Referring to Figure 6 , Figure 6As a further optional implementation, the coupling circuit comprises an optocoupler U37, and the switching circuit comprises a field effect transistor Q6. The positive electrode of the optocoupler U37 is connected to the output end of the main control circuit, the collector of the optocoupler U37 is connected to the gate of the field effect transistor Q6, and the negative electrode and the emitter of the optocoupler U37 are grounded.

[0046] wherein, Figure 6 VSIG_ONTEN is the control output end of the main control chip U31, and is connected to the GPIO pin of the main control chip U31, and is used for outputting 3.3V high and low levels.

[0047] Specifically, the optocoupler U37 is used for converting the 3.3V high and low levels output by VSIG_ONTEN into a control signal of the field effect transistor Q6.

[0048] The field effect transistor Q6 is used for turning on or turning off according to the control signal transmitted by the optocoupler U37, so as to control the signal transmission of the low-voltage cable 103.

[0049] The optocoupler is an electrical device that uses light as a transmission medium. It is composed of a light-emitting diode (LED) and a photosensitive transistor (such as a photosensitive triode). When the signal output by the main control chip U31 makes the light-emitting diode emit light, the photosensitive transistor will sense the light signal and produce a corresponding current or voltage change, thereby transmitting the signal to the switching circuit.

[0050] Referring to Figure 3 and Figure 6 , as a further optional implementation, the signal transmission module further comprises a power supply port, and the output end of the power supply port is connected to the drain of the field effect transistor Q6.

[0051] Specifically, the power supply port is used for outputting a 12V isolation power supply to the field effect transistor Q6.

[0052] Referring to Figure 3 and Figure 6 , as a further optional implementation, the signal transmission module further comprises a wiring port CN17, and the input end of the wiring port CN17 is connected to the source of the field effect transistor Q6, and the output end of the wiring port CN17 is connected to the input end of the low-voltage cable 103.

[0053] Specifically, the wiring port CN17 is used for connecting the input end of the low-voltage cable 103.

[0054] Referring to Figure 3 and Figure 6 , as a further optional implementation, the signal transmission module further comprises a protection circuit, and the protection circuit is connected between the source of the field effect transistor Q6 and the input end of the wiring port CN17.

[0055] Specifically, the protection circuit includes a diode D13, a positive electrode of the diode D13 is connected with a field effect tube Q6, for preventing the induced voltage of the tethering line from being inverted.

[0056] The circuit composition structure of the signal sending module is described above, and it can be understood that the main control chip U31 of the signal sending module outputs high and low levels through a GPIO pin, and controls the on-off of the photoelectric coupler U37. When the GPIO pin of the main control chip U31 outputs a high level, the control output end VSIG_ONTEN is 3.3V, the 3 and 4 pins of the photoelectric coupler U37 are turned on, the field effect tube Q6 is turned on, the wiring port CN17 outputs a 12V level, and the signal is allowed to be transmitted to the signal receiving module of the sky end through the low-voltage cable 103. When the GPIO pin of the main control chip U31 outputs a low level, the control output end VSIG_ONTEN is 0V, the 3 and 4 pins of the photoelectric coupler U37 are not turned on, the field effect tube Q6 is turned off, and the wiring port CN17 outputs a 0V level, so that the signal is not allowed to be transmitted to the signal receiving module of the sky end through the low-voltage cable 103.

[0057] Further, as an optional embodiment, the signal receiving module comprises a first resistor connected with the output end of the low-voltage cable 103.

[0058] Specifically, the signal receiving module judges the high and low level signals according to the port voltage, without additional decoding calculation, so as to reduce the computing power.

[0059] It should be noted that, in order to reduce the application of the chip, the signal sending module and the signal receiving module designed in the embodiment of the utility model are composed of one or more discrete elements, which can reduce the size of the circuit board, simplify the circuit board, and thus reduce the failure rate.

[0060] The structure and working principle of the unmanned aerial vehicle three-wire tethering cable of the utility model are described above, and it can be recognized that, compared with the existing tethering unmanned aerial vehicle cable, the utility model has the following advantages:

[0061] I. The signal is transmitted by a wired cable, which can concentrate the signal energy in the copper wire, thereby better resisting external wireless interference signals.

[0062] II. The signal receiving module judges the high and low level signals according to the port voltage, without additional decoding calculation, so as to reduce the computing power.

[0063] III. The signal sending module and the signal receiving module are composed of one or more discrete elements, which can reduce the size of the circuit board, simplify the circuit board, and thus reduce the failure rate.

[0064] In the description of the utility model, if several meanings are one or more, the meaning of multiple is two or more, greater than, less than, exceed and the like are understood as not including the number, above, below, within and the like are understood as including the number.If there is a description to the first, the second is only used for distinguishing the purpose of technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the relationship between the indicated technical features.

[0065] In the utility model, unless there is definite stipulation and limitation, the terms such as " install " " connect " " connect " " fixed " should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated;Can be mechanical connection, can also be electrical connection;It can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or interaction of two elements inside two elements, unless otherwise explicitly limited.The above-mentioned terms in the utility model can be understood according to the specific meaning of the specific circumstances by the ordinary skilled in the art.

[0066] In the utility model, unless there is definite stipulation and limitation, the first feature is " on " or " below " the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium.Moreover, the first feature " above " " above " and " above " the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature.The first feature " below " " below " and " below " the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0067] In the description of the specification, the description of the terms " one embodiment " " some embodiments " " example " " specific example " or " some examples " means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradicting each other.

[0068] The preferred embodiments of the utility model are described above, but the utility model is not limited to the embodiments, and the skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. A drone tri-line tether cable, characterized by: The application relates to a signal transmission module, which comprises a positive high-voltage cable, a negative high-voltage cable, a low-voltage cable and a signal transmission module, one end of the positive high-voltage cable, the negative high-voltage cable and the low-voltage cable is connected to a ground end, the other end of the positive high-voltage cable, the negative high-voltage cable and the low-voltage cable is connected to a sky end, the low-voltage cable is further connected with the signal transmission module, the positive high-voltage cable and the negative high-voltage cable are used for transmitting high-voltage power, and the low-voltage cable is used for transmitting low-voltage signals, wherein the signal transmission module comprises a plurality of discrete elements.

2. The unmanned aerial vehicle three-wire tethered cable of claim 1, wherein: The signal transmission module comprises a signal sending module, the signal sending module is located at the ground end, and the input end of the low-voltage cable is connected with the output end of the signal sending module.

3. The unmanned aerial vehicle three-wire tethered cable of claim 1, wherein: The signal transmission module comprises a signal receiving module, the signal receiving module is located at the sky end, and the output end of the low-voltage cable is connected with the input end of the signal receiving module.

4. The unmanned aerial vehicle three-wire mooring cable of claim 2, wherein: The signal sending module comprises a main control circuit, a coupling circuit and a switching circuit, the output end of the main control circuit is connected with the input end of the coupling circuit, the output end of the coupling circuit is connected with the input end of the switching circuit, and the output end of the switching circuit is connected with the input end of the low-voltage cable.

5. The unmanned aerial vehicle three-wire tethered cable of claim 4, wherein: The coupling circuit comprises a photoelectric coupler, the switching circuit comprises a field effect tube, the anode of the photoelectric coupler is connected with the output end of the main control circuit, the collector of the photoelectric coupler is connected with the gate of the field effect tube, and the cathode and the emitter of the photoelectric coupler are grounded.

6. The unmanned aerial vehicle three-wire tethered cable of claim 5, wherein: The signal sending module further comprises a power supply port, and the output end of the power supply port is connected with the drain of the field effect tube.

7. The unmanned aerial vehicle three-wire tethered cable of claim 5, wherein: The signal sending module further comprises a wiring port, the input end of the wiring port is connected with the source of the field effect tube, and the output end of the wiring port is connected with the input end of the low-voltage cable.

8. The unmanned aerial vehicle three-wire tethered cable of claim 7, wherein: The signal sending module further comprises a protection circuit, which is connected between the source of the field effect tube and the input end of the wiring port.

9. The unmanned aerial vehicle three-wire tethered cable of claim 4, wherein: The main control circuit comprises a main control chip and a filter circuit, the output end of the main control chip is connected with the input end of the coupling circuit, and the filter circuit is connected with the main control chip.

10. The unmanned aerial vehicle three-wire tethered cable of claim 3, wherein: The signal receiving module comprises a first resistor, and the first resistor is connected with the output end of the low-voltage cable.

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