CN209056926U - A lightning protection device for tethered unmanned aerial vehicle and a tethered unmanned aerial vehicle system - Google Patents

Abstract

Embodiments of the present utility model provide a lightning protection device for mooring a drone and a mooring drone system, wherein the provided device includes: a first surge protector, a second surge protector , grounding module, power supply and power supply equipment; the phase end of the first surge protector is connected to the output end of the power supply, and the neutral end is connected to the grounding module; the phase end of the second surge protector is connected to the output end of the power supply. The line end is connected with the input end of the power supply, and the neutral line end is connected with the grounding module; the power supply device is connected with the input end of the power supply; wherein, the power supply is used for mooring unmanned persons through the output end machine power supply. The device provided by the embodiment of the present utility model proposes a lightning protection device applied to a tethered unmanned aerial vehicle. Two surge protectors are used to discharge the lightning current, which solves the problem of the tethered unmanned aerial vehicle under lightning strike conditions. It eliminates the electromagnetic impact of lightning current on equipment and personnel, thus ensuring the safety of life and property of personnel and equipment.

Description

A lightning protection device for tethered unmanned aerial vehicle and a tethered unmanned aerial vehicle system

technical field

The embodiments of the utility model relate to the field of lightning protection, in particular to a lightning protection device for tethered unmanned aerial vehicles and a tethered unmanned aerial vehicle system.

Background technique

The tethered UAV high-altitude base station is a multi-rotor UAV equipped with an emergency base station communication system powered by a tethered power module. The system obtains the required power through the ground generator or 380V/220V, and transmits the voltage through the ground power conversion to the aerial power supply and then converts it to the voltage required for the operation of the UAV power system. The power transmission between the ground power and the air power is achieved by means of tethered cables. The control of the system is usually done by wire, that is, through the built-in optical fiber in the tethered cable to the terminal near the ground power supply.

The development of tethered UAVs aims to solve the problems of small load and short flight time of common light and small UAVs, and because it is often combined with communication equipment to improve the communication conditions in areas with poor infrastructure, its working state is It can be summarized as the establishment of the commanding heights of the platform under the complex weather in the wild and the long-term airborne operation. This working characteristic makes it easy to be used as a lightning source in thunderstorm weather. The tethered drone is connected to the ground power supply equipment through a tethered cable when it is operating in the air. In order to improve the loading efficiency of the drone, the weight of the cable will be reduced as much as possible. Therefore, the tethered cable is generally not provided with a conductive ground wire. When the drone is struck by lightning, its huge energy will impact the ground power supply and power supply equipment through the tethered cable. Because the operator is close to the ground equipment, it may even endanger the safety of the personnel.

At present, there are no lightning protection measures for light and small UAVs in the existing technology. The impact caused by lightning strikes is achieved by limiting the flight area as much as possible. Even with tethered cables, lightning will always cause impact damage to ground equipment and personnel.

Utility model content

The embodiments of the present utility model provide a lightning protection device for tethered unmanned aerial vehicles and a tethered unmanned aerial vehicle system, which are used to solve the problem that there are no lightning protection measures for light and small unmanned aerial vehicles in the prior art. The impact of lightning strikes is achieved by limiting the flight area as much as possible, but for tethered drones, since there are tethered cables between the air end and the ground end, lightning will always cause impact damage to ground equipment and personnel. .

On the one hand, an embodiment of the present utility model provides a lightning protection device for mooring a drone, including: a first surge protector, a second surge protector, a grounding module, a power supply and a power supply device;

The phase line end of the first surge protector is connected to the output end of the power supply, and the neutral line end is connected to the grounding module; the phase line end of the second surge protector is connected to the input end of the power supply , the neutral line terminal is connected to the grounding module; the power supply device is connected to the input terminal of the power supply; wherein the power supply is used to supply power to the tethered drone.

Wherein, the first surge protector is a switch-type surge protector, which is used to discharge the direct lightning current.

Wherein, the second surge protector is a voltage-limiting surge protector, which is used for discharging residual voltage.

Wherein, the second surge protector is a voltage-limiting surge protector, which is used for discharging residual voltage.

Wherein, the first surge protector, the second surge protector, the power supply and the power supply equipment are equipotentially connected.

On the other hand, an embodiment of the present invention provides a tethered unmanned aerial vehicle system, including:

A moored drone and the lightning protection device for mooring a drone as provided in the first aspect above; the moored drone is connected to an output end of a power supply in the lightning protection device through a mooring cable .

The lightning protection device for tethered unmanned aerial vehicle provided by the embodiment of the present invention adopts two surge protectors to discharge the lightning current, which solves the safety problem of the tethered unmanned aerial vehicle under the condition of lightning strike, and eliminates the The electromagnetic impact of lightning current on equipment and personnel ensures the safety of life and property of personnel and equipment.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative work.

1 is a schematic structural diagram of a lightning protection device for mooring a drone according to an embodiment of the present invention;

2 is a schematic structural diagram of a tethered unmanned aerial vehicle system according to an embodiment of the present invention;

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of a lightning protection device for mooring a drone according to an embodiment of the present invention. The provided device includes: a first surge protector 11, a second surge protector Protector 12 , grounding module 13 , power supply 14 and power supply equipment 15 .

The phase line end of the first surge protector 11 is connected to the output end of the power supply 14 , the neutral line end is connected to the grounding module 13 ; the phase line end of the second surge protector 12 is connected to the power supply 14 . The input end is connected, and the neutral line end is connected to the grounding module 13; the power supply device 15 is connected to the input end of the power supply 14; wherein the power supply 14 is used to supply power to the moored drone through the output end.

Specifically, the device provided in this embodiment uses the first surge protector and the second surge protector to eliminate the electromagnetic impact of lightning current on equipment and personnel by means of graded shunt discharge, thereby ensuring the safety of operators. .

The first surge protector is mainly used to discharge the energy entering the tethered cable as soon as possible, so as to protect the protected equipment or system from being damaged by impact. The second surge protector is mainly used to limit the instantaneous overvoltage on the conductive line within the voltage range that the equipment or system can withstand. When the tethered drone is struck by lightning, the drone is equivalent to an air-termination device, and the tethered cable is equivalent to a down conductor. The lightning current will inject energy into the lightning protection device on the ground along the tethered cable. The energy of the lightning strike is very huge, and it is necessary to gradually discharge the lightning strike energy to the ground through the method of graded discharge.

Between the UAV and the output terminal of the ground power supply, a switch-type surge protector is installed as the first-level protection to discharge the direct lightning current. The phase line of the switch-type surge protector is connected to the output end of the power supply. When the mooring cable is directly struck by lightning, it will discharge the huge energy conducted. There is a secondary protection between the input end of the power supply and the power supply equipment. The residual voltage of the front-stage protector and the protection equipment for induced lightning strikes in the area are protected by the voltage-limiting surge protector. , there is still a part of the energy that is quite huge for the device and needs to be further absorbed by the second surge protector. The phase line interface of the second surge protector is connected with the ground power input end, and is connected in series with the grounding column and the lightning protection grounding pin to be connected to the ground. The purpose of its setting is to further limit the value of the residual surge voltage through the first surge protector to 1000-2000V, and the second-level power surge protector selects the 5SD7414-2 signal surge protector.

Through this device, a lightning protection device for tethered unmanned aerial vehicles is proposed. Two surge protectors are used to discharge the lightning current, which solves the safety problem of tethered unmanned aerial vehicles under lightning strike conditions and eliminates the It avoids the electromagnetic impact of lightning current on equipment and personnel, thus ensuring the safety of life and property of personnel and equipment.

On the basis of the above embodiment, the first surge protector is a switch-type surge protector, which is used to discharge the direct lightning current. The second surge protector is a voltage-limiting surge protector for discharging residual voltage. The grounding module adopts the TT grounding system for grounding. The first surge protector, the second surge protector, the power supply and the power supply device are equipotentially connected.

Specifically, the first surge protector is a switch-type surge protector (SPD). The function of the switch-type surge protector is to discharge the energy entering the tethered cable as soon as possible to protect the protected equipment or system from damaged by impact. The second surge protector is a voltage-limiting surge protector whose main function is to limit the instantaneous overvoltage on the conductive line within the voltage range that the equipment or system can withstand. The switch-type surge protector is a gap discharge type device, which has a large ability to discharge lightning energy. The main function used on the line is to discharge the lightning energy; The discharge ability is small, but its overvoltage suppression ability is good. The main function of using it on the line is to limit the overvoltage. The first surge protector, the second surge protector, the equipotential connection between the power supply and the power supply equipment, and the grounding module adopts the TT grounding system. The potential difference between components is eliminated, and the danger of dangerous fault voltages introduced from outside the equipment through electrical lines and various metal pipes is eliminated. In the TT system, one point of the power system is directly connected to the ground, and the exposed conductive part of the electrical device on the load side is connected to an independent grounding device on the electrical equipment that has nothing to do with the grounding point of the power system. In the TT system, except for the direct grounding of the neutral point on the low-voltage side of the transformer, the neutral wire is no longer grounded, and the same insulation level as the phase wire should be maintained. When a ground fault occurs in the equipment, the grounding current forms a loop through the grounding resistance of the equipment and the grounding resistance of the system, resulting in a voltage drop across the two resistances, so the grounding voltage of the equipment is far smaller than the phase voltage, that is, the protective grounding reduces the contact voltage, But this voltage is still very dangerous to the human body, so in the TT system, an overcurrent protector or a residual current action protector should also be used for protection.

Referring to FIG. 2, FIG. 2 is a schematic structural diagram of a tethered unmanned aerial vehicle system according to an embodiment of the present invention. The provided system includes the lightning protection device LPZ1 for tethered unmanned aerial vehicle provided by the above-mentioned embodiment. and the tethered unmanned aerial vehicle LPZ0A, the tethered unmanned aerial vehicle LPZ0A is connected to the output end of the power supply in the lightning protection device LPZ1 through a tethered cable.

The system includes two levels of lightning protection devices, which are respectively placed at the junction of the direct lightning non-protection zone (LPZ0A) and the first protection zone (LPZ1) and at the junction of the first protection zone (LPZ1) and the second protection zone (LPZ2). The second protection zone is the power supply device 15, which is used for supplying power to the power supply. When the drone is struck by lightning, the drone is equivalent to a lightning receptor, and the tethered cable is equivalent to a down conductor. The lightning current will inject energy into the ground equipment along the tethered cable, because the energy of the lightning strike is very huge. , it is necessary to discharge the lightning strike energy gradually to the ground through the method of graded discharge. At the junction of the direct lightning non-protection zone (LPZ0A) and the first protection zone (LPZ1), that is, between the UAV and the output end of the ground power supply 14, a switch-type surge protector 11 is installed as the first level of protection to protect against direct lightning strikes. The lightning current is discharged, or when the mooring cable is directly struck by lightning, the huge energy that is conducted is discharged. A voltage-limiting surge protector 12 is installed at the junction of the first protection zone and the second protection zone (LPZ2) as the second level of protection. The second-level protector is a protective device for the residual voltage of the front-level protector and the induced lightning strike in the area. When a large lightning strike energy absorption occurs in the front-level, there is still a part that is quite huge for the equipment or the second-level protector. The energy will be conducted over, and a second-level protector will be required to further absorb it. At the same time, the transmission line passing through the first-level lightning arrester will also induce lightning strike electromagnetic pulse radiation. When the line is long enough, the energy of the induced lightning becomes large enough, and the second-level protector is required to further discharge the lightning strike energy.

The phase line of the second-level surge protector is connected to the ground power input terminal, and is connected to the grounding module 13 in series, and the lightning protection grounding nail is connected to the ground. The purpose of its setting is to further limit the value of the residual surge voltage through the first-level lightning arrester to 1000-2000V, and implement equipotential bonding for LPZ1-LPZ2. The second-level power supply surge protector adopts the 5SD7414-2 type surge protector and adopts the TT grounding system.

Through this system, the device of the utility model proposes a tethered unmanned aerial vehicle system, which solves the safety problem of ground equipment and personnel of tethered unmanned aerial vehicles under the condition of lightning strike, and makes up for the blank of lightning protection technology in the field of tethered unmanned aerial vehicles. . The key point of its technology is that it proposes a discharge method that installs surge protectors on ground equipment to achieve graded shunting, so as to avoid the damage of lightning energy to ground equipment and personnel.

The device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or some parts of the embodiments.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit of the technical solutions of the embodiments of the present invention and range.

Claims (6)

1. a kind of for being tethered at the lightning protection device of unmanned plane characterized by comprising

First Surge Protector, the second Surge Protector are grounded mould group, power supply and power supply unit；

The phase line end of first Surge Protector is connected with the output end of power supply, and zero line side is connected with the ground connection mould group；

The phase line end of second Surge Protector is connected with the input terminal of the power supply, zero line side and the ground connection mould group phase Even；

The power supply unit is connected with the input terminal of the power supply；

Wherein, the power supply is used to power by output end to unmanned plane is tethered at.

2. the apparatus according to claim 1, which is characterized in that first Surge Protector is switching mode surge protection Device, for releasing to direct attack lightning current.

3. the apparatus according to claim 1, which is characterized in that second Surge Protector is votage limit type surge protection Device, for releasing to residual voltage.

4. the apparatus according to claim 1, which is characterized in that the ground connection mould group is grounded using TT earthed system.

5. the apparatus according to claim 1, which is characterized in that first Surge Protector, the second Surge Protector, electricity It is equipotential link between source and power supply unit.

6. one kind is tethered at UAV system characterized by comprising

It is tethered at unmanned plane and a method as claimed in any one of claims 1 to 5 for being tethered at the lightning protection device of unmanned plane；

The unmanned plane that is tethered at is connected by being tethered at cable with the output end of power supply in the lightning protection device.