Falling collision protection device, task equipment module and aerostat

Abstract

The invention discloses a falling collision protection device, a task equipment module and an aerostat, and relates to the technical field of aerostats, the falling collision protection device comprises a mounting part, an air bag and a control unit, and the mounting part is provided with a containing cavity; the air bag can be contained in the containing cavity, and a gas generating agent is loaded in the air bag; the control unit is used for judging whether falling and collision protection is implemented or not, and when falling and collision protection is implemented, the gas generating agent is excited to generate protective gas, so that the air bag is unfolded under the action of pressure. According to the falling collision protection device, the solid sodium azide is instantaneously decomposed to generate nitrogen, so that the air bag is quickly unfolded before touching the ground, and the buffer failure caused by inflation delay of the compressed air cylinder is eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerostats, and in particular to a crash protection device, a mission equipment module and an aerostat. BACKGROUND

[0002] The avionics pod of a tethered airship and optical, radar and other precision payloads are usually fixed to the bottom of the pod. When the airship body suddenly loses lift, the tether cable breaks or the control command urgently forces the airship to land, the equipment falls with the airship body and finally collides with the ground at high speed. In order to alleviate the impact, the existing technology generally uses elastic struts, rubber shock absorbers or carries compressed gas cylinders and air blower to supply air to auxiliary airbags in a passive buffering mode, in order to reduce the overload at the moment of landing.

[0003] The compressed gas cylinder and air blower auxiliary airbag scheme relies on the delivery of gas along the pipeline and expansion, and the inflation process has inherent delay, which causes the airbag to fail to fully expand in the extremely short time of the airship falling at high speed to the ground, and the buffering function is thus ineffective. SUMMARY

[0004] The purpose of the present application is to provide a crash protection device, which generates nitrogen gas by instantaneous decomposition of solid sodium azide, so that the airbag rapidly expands before landing, eliminating the buffering failure caused by the inflation delay of the compressed gas cylinder. Another purpose of the present application is to provide a mission equipment module and an aerostat.

[0005] To achieve the above purpose, the present application provides a crash protection device, comprising:

[0006] A mounting member is provided with a receiving cavity;

[0007] An airbag can be accommodated in the receiving cavity, and the airbag is loaded with a gas generating agent inside;

[0008] A control unit is used to determine whether to implement crash protection, and when crash protection is implemented, the gas generating agent is excited to generate protective gas, so that the airbag expands under the action of pressure.

[0009] In some embodiments, the gas generating agent includes solid sodium azide, and the protective gas includes nitrogen gas generated by decomposition of the solid sodium azide.

[0010] In some embodiments, the control unit includes an electric heating wire, which uses the Joule heating effect to heat excite the gas generating agent.

[0011] In some embodiments, further comprising:

[0012] A distance measuring module is fixed to the mounting member, and the distance measuring module is used to measure distance data from the ground;

[0013] The control unit is connected with the distance measuring module, and is configured to determine whether to implement the crash protection according to the distance data.

[0014] In some embodiments, the control unit is configured to:

[0015] receive the distance data and calculate speed data, and determine whether to implement the crash protection according to the distance data and the speed data.

[0016] In some embodiments, when the control unit determines whether to implement the crash protection according to the distance data and the speed data, the control unit is configured to:

[0017] first, compare the distance data with a preset distance, and if the distance data is less than the preset distance, determine that a first condition for implementing the crash protection is met;

[0018] second, compare the speed data with a preset speed under the premise that the first condition is met, and if the speed data is greater than the preset speed, determine that a second condition for implementing the crash protection is met;

[0019] third, implement the crash protection under the premise that the second condition is met.

[0020] In some embodiments, the distance measuring module comprises a laser distance measuring module.

[0021] In some embodiments, the control unit comprises a control board and a battery; and / or,

[0022] The mounting member is provided with an opening; the crash protection device further comprises:

[0023] a cover plate bonded to the opening, the cover plate being configured to close the accommodating cavity;

[0024] The bonding force of the cover plate is less than the force acting on the airbag when the airbag is deployed.

[0025] The present application also provides a task equipment module comprising a cabin body and the above-mentioned crash protection device, and the mounting member is fixed to the cabin body.

[0026] The present application also provides an aerostat comprising an aerostat body;

[0027] The aerostat further comprises the above-mentioned crash protection device, and the mounting member is fixed to the aerostat body; and / or,

[0028] The aerostat further comprises the above-mentioned task equipment module, and the task equipment module is fixed to the aerostat body.

[0029] With respect to the above background art, the crash protection device provided by the present application mainly comprises a mounting member, an air bag and a control unit, the mounting member is provided with a receiving cavity; the air bag can be accommodated in the receiving cavity, and a gas generating agent is loaded in the air bag; the control unit is used for judging whether to implement crash protection, and when the crash protection is implemented, the gas generating agent is triggered to generate protective gas, so that the air bag is unfolded under the action of pressure.

[0030] In the prior art, the compressed gas cylinder or air blower scheme must sequentially complete three links of electromagnetic valve opening, high-pressure gas delivery along the pipeline, and air bag inflation, each link is restricted by fluid inertia and pipeline resistance, the inflation process presents an exponential decay characteristic, and full inflation cannot be completed within a millisecond time window at the end of airship falling, resulting in invalidation of the buffer at the moment of landing.

[0031] The present application provides a crash protection device, the core of which is that the gas generating agent is directly loaded in the air bag. When the control unit judges that crash protection needs to be implemented, the gas generating agent is triggered to rapidly generate a large amount of protective gas. This design omits the intermediate link of gas delivery in the traditional scheme, and avoids the inflation delay caused by the gas transmission path. Due to the direct combination of the gas generating agent and the air bag, the generation of the protective gas and the unfolding of the air bag are almost synchronous, which greatly shortens the inflation time, so that the air bag can be rapidly unfolded before the airship lands, thereby effectively solving the problem of invalidation of the buffer caused by the inflation delay in the prior art.

[0032] In combination with the above structure and process description, it can be seen that the crash protection device has at least the following beneficial effects: nitrogen gas is generated by instantaneous decomposition of solid sodium azide, so that the air bag is rapidly unfolded before landing, and the invalidation of the buffer caused by the inflation delay of the compressed gas cylinder is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0034] Figure 1 A schematic view of the crash protection device provided by the embodiments of the present application;

[0035] Figure 2 An exploded view of the crash protection device provided by the embodiments of the present application;

[0036] Figure 3 An installation view of the crash protection device provided by the first embodiment of the present application;

[0037] Figure 4The crash protection diagram of the crash protection device provided for the first embodiment of the present application;

[0038] Figure 5 The installation diagram of the crash protection device provided for the second embodiment of the present application;

[0039] Figure 6 The crash protection diagram of the crash protection device provided for the second embodiment of the present application;

[0040] Figure 7 The working flowchart of the crash protection device provided for the embodiment of the present application.

[0041] Wherein:

[0042] The crash protection device 100, the mounting piece 1, the accommodating cavity 101, the opening 102, the connecting lug 11, the connector 12, the air bag 2, the control unit 3, the control panel 31, the battery 32, the distance measuring module 4, the cover plate 5,

[0043] The task equipment module 1000, the cabin body 6, the working device 7,

[0044] The airship 10000, the airship body 8. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0046] Currently, the tethered airship adopts a mechanical buffer structure (such as an elastic support or a rubber shock absorber) at the bottom of the equipment or relies on a compressed gas cylinder or a blower-assisted air bag.

[0047] The prior art has the following disadvantages.

[0048] For the mechanical buffer structure, the mechanical buffer response is lagging: the mechanical buffer structure belongs to passive energy absorption and only plays a role after touching the ground, cannot be started in advance before touching the ground, and the impact reduction effect is general.

[0049] The protection is not comprehensive: the mechanical buffer structure is difficult to cope with complex landing attitudes and terrains, and the protection effect is limited.

[0050] For the compressed gas cylinder or the blower-assisted air bag, the inflation speed is slow: the compressed gas cylinder is limited by the bottle pressure and the pipeline, and the inflation time is as long as hundreds of milliseconds to several seconds, which cannot meet the high-speed landing requirement.

[0051] Carrying extra weight: the high pressure gas of the compressed gas cylinder has high requirements for the strength of the gas cylinder, and the gas cylinder is generally heavy. The captive boat carrying the gas cylinder ascends, which reduces the weight of the useful load that can be carried.

[0052] Single trigger mechanism: lack of height and speed dual criteria, easy to trigger in normal landing or low-altitude maneuver, or fail in real emergency.

[0053] In order to solve at least one of the above problems, the present application provides a crash protection device, a task equipment module and an aerostat.

[0054] In order to make the person skilled in the art better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0055] Please refer to Figures 1 to 7 , wherein, Figure 1 the schematic diagram of the crash protection device provided by the embodiment of the present application, Figure 2 the exploded view of the crash protection device provided by the embodiment of the present application, Figure 3 the installation diagram of the crash protection device provided by the first embodiment of the present application, Figure 4 the crash protection diagram of the crash protection device provided by the first embodiment of the present application, Figure 5 the installation diagram of the crash protection device provided by the second embodiment of the present application, Figure 6 the crash protection diagram of the crash protection device provided by the second embodiment of the present application, Figure 7 the working flowchart of the crash protection device provided by the embodiment of the present application.

[0056] In the first specific embodiment, the crash protection device 100 provided by the embodiment of the present application mainly comprises a mounting member 1, an air bag 2 and a control unit 3, the mounting member 1 is provided with a containing cavity 101; the air bag 2 can be accommodated in the containing cavity 101, and the air bag 2 is loaded with a gas generating agent inside; the control unit 3 is used to judge whether to implement crash protection, and when the crash protection is implemented, the gas generating agent is triggered to generate protective gas, so that the air bag 2 is expanded under the action of pressure.

[0057] In the prior art, the compressed gas cylinder or the blower scheme must complete the three links of electromagnetic valve opening, high pressure gas conveying along the pipeline and air bag inflation in turn, each link is restricted by fluid inertia and pipeline resistance, the inflation process presents exponential decay characteristics, and full inflation cannot be completed within the millisecond time window of the final section of airship falling, resulting in failure of buffer at the moment of landing.

[0058] The application provides a crash protection device 100, which is characterized in that a gas generating agent is directly loaded in an air bag 2. When a control unit 3 determines that crash protection is needed, the gas generating agent is triggered to rapidly generate a large amount of protective gas. This design omits the intermediate link of gas delivery in the traditional scheme, avoiding the inflation delay caused by the gas transmission path. Due to the direct combination of the gas generating agent and the air bag 2, the generation of the protective gas and the unfolding of the air bag 2 are almost synchronous, greatly shortening the inflation time, enabling the air bag 2 to rapidly unfold before the airship touches the ground, and effectively solving the problem of buffer failure caused by inflation delay in the prior art.

[0059] In combination with the above structure and process description, it can be seen that the crash protection device 100 has at least the following beneficial effects: nitrogen gas is generated by instantaneous decomposition of solid sodium azide, the air bag 2 is rapidly unfolded before touching the ground, and the buffer failure caused by inflation delay of the compressed gas cylinder is eliminated.

[0060] It should be noted that the installation position of the crash protection device 100 is not limited in this embodiment, for example, the mounting member 1 is installed near the device to be protected, so that the unfolded air bag 2 is interposed between the ground and the device, avoiding direct collision of the device with the ground, thereby providing crash protection for the device.

[0061] In addition, the specific composition of the gas generating agent is not limited in this embodiment; in other words, the gas generating agent can be a solid compound such as sodium azide, guanidine nitrate, or azodicarbonamide, or a liquid monomer stored in a microcapsule, or a solid-liquid mixed gas generating composition; the gas generating approach can be exothermic decomposition, acid-base neutralization, oxidation-reduction, or catalytic cracking. Therefore, as long as the gas can be rapidly released in the capsule after being triggered, the functional requirements of this embodiment can be met.

[0062] Similarly, the triggering method of the gas generating agent is not limited in this embodiment; the control unit 3 can apply initial energy to the agent through the thermal effect of a heating wire, mechanical striking, laser ignition, microwave induction, or shock wave initiation; current, light radiation, pressure pulse, or chemical reaction chain can all be effective trigger sources. As long as the triggering action can start the gas generating process within a millisecond time window and ensure that the gas generating starting point coincides with the air bag inflation starting point, the core purpose of "omitting the intermediate delivery link and shortening the inflation time" can be achieved.

[0063] Optionally, the mounting member 1 is provided with a connecting lug 11, and the mounting member 1 is mounted and fixed by using the connecting lug 11; the fixing methods include but are not limited to screws, 3M glue, straps, or magic bands.

[0064] In some embodiments, the gas generating agent includes solid sodium azide, and the protective gas includes nitrogen gas generated by decomposition of the solid sodium azide.

[0065] In the embodiment, the gas generating agent is specifically solid sodium azide, and the decomposition product of the sodium azide, i.e., nitrogen, directly constitutes the protective gas, thereby forming a single corresponding relationship between the agent and the gas. The sodium azide is in a solid state at normal temperature, has a high volumetric energy density, and can complete decomposition and release a large amount of nitrogen in a very short time, thereby meeting the requirement of rapid inflation of the airbag.

[0066] The solid form is beneficial to long-term storage and sealing, and can avoid leakage, delamination or fatigue problems of a pressure container that may occur in liquid or gaseous precursors. The decomposition reaction only produces nitrogen and a solid sodium residue, and the gas is pure and non-corrosive, and can be directly filled into the airbag without additional filtration, thereby simplifying the system structure. Nitrogen is an inert gas, and is chemically stable and will not cause side reactions with the airbag material or external components, thereby ensuring safety and controllability of the inflation process. Meanwhile, the decomposition threshold of the solid sodium azide is clear, and reliable excitation can be achieved through a small amount of energy input, thereby providing consistent and repeatable triggering conditions for the control unit.

[0067] In some cases, the interior of the airbag 2 is divided into a filling area of the gas generating agent and other areas, and a filter is arranged between the filling area and the other areas. Since the filling area is not completely pure gas generating agent, other impurities are also mixed therein, or when the gas generating agent is not sodium azide, excitation of the gas generating agent is also accompanied by generation of other impurities. The impurities will enter the other areas together with the protective gas after being mixed with the protective gas. In order to avoid damage to the airbag 2 caused by the impurities, the mixed gas is filtered through the filter, and the purified protective gas fills the airbag 2.

[0068] Optionally, the airbag 2 is installed and fixed in the form of a module in the crash protection device 100, and after the gas generating agent of the airbag 2 is used up, the airbag 2 can be replaced with a new airbag 2 filled with the gas generating agent, so that the crash protection device 100 can function again.

[0069] In some embodiments, the control unit 3 includes an electric heating wire, and the electric heating wire uses the Joule heating effect to heat-excite the gas generating agent.

[0070] In the embodiment, the control unit 3 uses the electric heating wire to implement heat excitation, and the working logic is based on two-stage conversion of “electric energy-thermal energy-chemical energy”. First, when the control unit 3 determines that the crash protection needs to be implemented, the control unit 3 outputs a stable current to the electric heating wire. The electric heating wire uses the Joule heat generated by the resistance of the electric heating wire to heat up to the decomposition threshold of the gas generating agent in a very short time. Taking sodium azide as an example, the sodium azide is ignited and rapidly decomposes to generate a large amount of nitrogen as the protective gas, so that the airbag 2 is inflated under the action of the pressure.

[0071] As an option, the heating wire is in direct contact with the solid sodium azide after penetrating into the air bag 2, the heat transfer path is extremely short, and no intermediate medium or mechanical structure is needed, thereby avoiding energy loss and delay in the transfer process.

[0072] This excitation mode has the characteristics of rapid response and accurate control. The on-off of the current is completely determined by the instruction of the control unit 3, and the excitation opportunity can be accurately controlled to the millisecond level, ensuring that the air bag 2 is deployed in time before the airship touches the ground. In addition, the electric heating wire has a simple structure and a small size, which is convenient to integrate in the installation space inside or adjacent to the air bag 2, does not increase the additional mechanical complexity, and does not need high-pressure or impact components, thereby significantly improving the safety and reliability of the system.

[0073] In addition, other chemical gas generating agents (such as guanidine nitrate, composite propellant) can be used instead of sodium azide (NaN3) ), which also belongs to the scope of the description of the present embodiment. Considering the reaction speed, gas purity and safety comprehensively, the most advantageous.

[0074] In some embodiments, it further comprises:

[0075] The distance measuring module 4 is fixed to the mounting member 1, and the distance measuring module 4 is used to measure the distance data from the ground;

[0076] The control unit 3 is in signal connection with the distance measuring module 4, and the control unit 3 is used to determine whether to implement the crash protection according to the distance data.

[0077] In the present embodiment, the distance measuring module 4 is rigidly fixed to the mounting member 1, and the detection end thereof faces the ground, and can output the linear distance data between the mounting member 1 and the ground surface in real time; the control unit 3 is connected with the distance measuring module 4 through a signal link, continuously receives the distance data, and independently decides whether to start the crash protection according to the distance data.

[0078] It should be noted that since the scheme only defines the functional boundary of the distance measuring module 4 to provide distance data, and does not make any limitation on the distance measuring principle, carrier type or upper limit of the range, ultrasonic waves, laser, millimeter waves, radar or optical stereo vision can be used as the implementation means, and the system designer can freely choose according to the accuracy requirement, environmental interference characteristics and power consumption constraint. Once the distance data enters the control unit 3, it becomes an input variable of the trigger criterion, and the subsequent logic operation and excitation timing are all based on this variable, thereby converting the physical quantity of “height from the ground” into the decision basis of “whether to deploy the air bag 2”, and realizing the height-controllable active protection.

[0079] On this basis, the crash protection device 100 can not only realize the height-controllable active protection, but also introduces speed as a second condition, thereby realizing the height- and speed-controllable active protection.

[0080] In particular, the control unit 3 is configured to:

[0081] receive distance data and calculate speed data, determine whether to implement crash protection according to the distance data and the speed data.

[0082] In this embodiment, the control unit 3 further performs time differentiation processing on the distance data on the basis of only obtaining the distance data, generates speed data in real time, thereby jointly taking the “ground clearance” and the “vertical descent speed” into the trigger decision framework, and forms the active protection logic of the binary criterion. This configuration does not require additional sensors, and speed information can be derived from a single distance signal through a software algorithm, so that the system structure remains simple.

[0083] By introducing the speed data, the control unit 3 can distinguish between “low-altitude hovering” and “low-altitude emergency descent”: when the distance data is below the threshold but the speed data is still in the safe range, it can be determined as a controllable landing, and the airbag 2 is inhibited from being deployed; only when the distance data and the speed data simultaneously cross their respective preset thresholds, the risk condition of “imminent hard landing” is met, triggering the instantaneous activation of the gas generating agent. In this way, while retaining the controllability of the height, the device obtains the direct perception ability of the falling kinetic energy, significantly reduces the probability of false triggering caused by low-altitude maneuvering or wind disturbance, and realizes the precise protection of the height-velocity binary coupling.

[0084] In some embodiments, when the control unit 3 determines whether to implement crash protection according to the distance data and the speed data:

[0085] First, compare the distance data with the preset distance, if the distance data is less than the preset distance, determine that the first level condition for implementing crash protection is met;

[0086] Second, on the premise of meeting the first level condition, compare the speed data with the preset speed, if the speed data is greater than the preset speed, determine that the second level condition for implementing crash protection is met;

[0087] Third, on the premise of meeting the second level condition, implement crash protection.

[0088] In this embodiment, the control unit 3 uses “less than” and “greater than” as comparison operators, and performs two-level threshold determination on the distance data and the preset distance, and the speed data and the preset speed, forming a strict height-velocity AND trigger logic. In the first step, when the distance data is lower than the preset distance, the system determines that the flight platform has entered the dangerous height interval, and the first level condition is met; at this time, if the speed has not reached the threat level, the logic remains standby to avoid premature activation. In the second step, on the basis of meeting the first level condition, the speed data needs to be higher than the preset speed to be considered as having enough kinetic energy to cause impact, and the second level condition is met.

[0089] Both two-step determinations take strict inequalities as trigger boundaries, ensuring that the triggering moment is neither lower than the safety height threshold nor delayed to a more dangerous low-speed state, thereby implementing crash protection at the double critical point of sufficient height and high speed, achieving precise and timely airbag deployment.

[0090] In some embodiments, the distance measuring module 4 comprises a laser distance measuring module.

[0091] In the present embodiment, the distance measuring module 4 is embodied as a laser distance measuring module, which measures the straight-line distance between the mounting member 1 and the ground using the time-of-flight or phase difference principle. The laser beam has the characteristics of strong directivity and small divergence angle, and can maintain signal strength and measurement accuracy in the range of hundreds of meters, thereby providing the control unit 3 with continuous, stable and high update frequency distance data.

[0092] Thanks to the long-distance capability of laser ranging, the control unit 3 can obtain accurate height information before the airship enters the low-altitude turbulence zone, and establish a speed trend curve in advance, leaving sufficient sampling periods for the operation of the subsequent two-level criteria. Compared with ultrasonic or infrared solutions, laser ranging can still maintain a low bit error rate in strong light, high temperature or electromagnetic interference environments, ensuring the reliability of distance-speed calculation; at the same time, its narrow beam characteristic avoids the reflection interference of side obstacles, making the measurement value truly reflect the vertical height change. Thus, the system can complete the first-level condition locking at a farther distance and earlier time, and immediately execute the second-level speed review after entering the critical height interval, significantly extending the available time window for decision-making and triggering, ensuring that the airbag 2 has sufficient deployment time before landing.

[0093] In some embodiments, the control unit 3 comprises a control board 31 and a battery 32.

[0094] In the present embodiment, the control unit 3 is composed of the control board 31 and the battery 32, forming an independent power supply and signal processing core. The control board 31 carries a microprocessor, a memory and a power switch circuit, responsible for receiving distance data from the distance measuring module 4, completing speed calculation, executing two-level threshold comparison, and outputting a triggering signal when the determination condition is met; the battery 32 provides stable DC voltage for the control board 31 and the subsequent triggering circuit, even if the main power supply of the airship is interrupted, the judgment and triggering functions can still be maintained. Both are integrated in the same sealed cavity and directly coupled through internal buses, eliminating the plug-in nodes of external power supply lines, reducing the risk of contact failure, and ensuring that the crash protection device 100 can still complete the whole process protection action in a power-off, electromagnetic interference or severe vibration environment.

[0095] As an option, a connector 12 is provided on the mounting member 1, which is led out from the inside of the mounting member 1 and connected with the control unit 3, while providing a joint for external connection of the crash protection device 100.

[0096] In some cases, the connector 12 is connected to an external safety control system, so that the control unit 3 is in communication with the safety control system, and the control unit 3 is powered by the external power supply at all times, and if the external power supply fails, the battery 32 ensures the power supply for the activation task.

[0097] In some embodiments, the mounting member 1 is provided with an opening 102; the crash protection device 100 further comprises:

[0098] A cover plate 5 is bonded to the opening 102, and the cover plate 5 is used to close the accommodation cavity 101;

[0099] The bonding force of the cover plate 5 is less than the force acting on the cover plate 5 when the airbag 2 is deployed.

[0100] In this embodiment, the cover plate 5 covers the opening 102 in a bonded manner, forming a breakable closure interface, which prevents foreign matter from entering or the airbag 2 from coming out during flight, and ensures that the airbag 2 can break through the constraint quickly when it is deployed. The selection of the adhesive makes the adhesion of the cover plate 5 lower than the axial thrust generated by the internal pressure of the airbag 2. When the gas generating agent is activated and the air pressure rises instantaneously, the thrust acts on the inside of the cover plate 5, and the bonding interface becomes the first failure point. The cover plate 5 falls off or is partially torn, and the opening 102 is immediately completely released, providing an unobstructed inflation channel for the airbag 2. This design replaces mechanical latches or explosive bolts with controllable bonding strength, and achieves "zero delay" opening without additional driving elements, which simplifies the structure, avoids secondary damage to surrounding equipment caused by flying metal fragments, and balances reliability, lightweight and safety.

[0101] As an option, the opening 102 of the mounting member 1 is processed into an L-shaped step, forming a circumferential corner bearing platform; after the cover plate 5 is embedded in the corner, its outer surface is flush with the outer contour of the mounting member 1, and its inner surface is in abutment between the axial end face and the radial end face of the step. The axial end face of the step bears the reverse thrust that the cover plate 5 may be subjected to during flight vibration, air pressure fluctuation or maintenance operation, and prevents the cover plate 5 from sliding inward into the accommodation cavity 101; when the internal pressure of the airbag 2 rises suddenly, the thrust direction points outward, and the cover plate 5 only has freedom in this direction, and the bonding interface becomes the only controllable failure path, thereby ensuring that the breakthrough direction is single and the risk of flying fragments is minimized. The L-shaped corner also provides a self-centering function, so that the cover plate 5 can be put in along the axial direction and automatically centered during assembly, reducing stress concentration caused by uneven bonding thickness, and further ensuring the consistency of the opening pressure threshold.

[0102] As shown in Figure 7 In a specific embodiment, the working flow chart of the crash protection device 100 is described as follows.

[0103] Stage one: instruction and data.

[0104] 1. "Manual input instruction" or emergency instruction triggered by safety control trigger.

[0105] 2. The main control board (control board 31) starts to continuously acquire the "height" and "speed" data provided by GNSS (from the control system) or laser ranging module.

[0106] Phase two: intelligent judgment (double insurance).

[0107] 3. Height judgment: the system first judges whether the airship is at a dangerous height close to the ground.

[0108] 4. If "no", cancel the trigger to avoid false start.

[0109] 5. If "yes", go to the next level of judgment.

[0110] 6. On the basis of the dangerous height, further judge whether the current speed is too fast.

[0111] 7. If "no", the state is controllable, cancel the trigger.

[0112] 8. If "yes", both dangerous conditions are met, the system confirms to execute the protection action.

[0113] Phase three: trigger and inflation.

[0114] 9. The control board sends the ignition instruction to the heating wire (electric heating wire) of the airbag system.

[0115] 10. The electric current passes through the heating wire, ignites the solid sodium azide (NaN3) , which decomposes rapidly to produce a large amount of nitrogen gas (N2) ).

[0116] Reaction equation: .

[0117] Phase four: landing buffer.

[0118] 11. The generated nitrogen gas fills the airbag instantly, providing a buffer pad for the falling airship.

[0119] 12. Finally achieve the safety protection purpose of "airship landing, airbag buffer".

[0120] The application also provides a task equipment module 1000, which comprises a cabin body 6 and the crash protection device 100 described above, and the mounting piece 1 is fixed to the cabin body 6.

[0121] In the embodiment, the task equipment module 1000 is composed of the cabin 6 and the crash protection device 100: the mounting member 1 is rigidly fixed to the bottom frame of the cabin 6 by screws, 3M glue or a cable tie, so that the deployment direction of the airbag 2 is vertically towards the ground; when the control unit 3 determines that the triggering condition is established, the gas generating agent instantaneously generates gas, the airbag 2 expands outward along the opening 102 of the mounting member 1, and lands on the ground before the cabin 6 and the internal precise load, thereby forming a local cushion. The configuration takes the crash protection device 100 as a standardized subsystem of the task equipment module 1000, and the modularization can be added without making large-scale changes to the original structure of the cabin 6, so that the sealing and electromagnetic shielding integrity of the equipment in the cabin is maintained, and the whole module is endowed with the ability to independently cope with hard landing, thereby significantly reducing the impact overload of the task equipment in the scene of sudden loss of lift or broken tether cable.

[0122] As an option, the number of crash protection devices 100 can be increased, so as to form a distributed airbag layout on the task equipment module 1000.

[0123] In a specific embodiment, for the existing tethered airship, in the case of sudden loss of lift, broken tether cable, emergency landing under control, etc., the avionics pod, precise equipment load (multispectral camera, radar, etc.) and other equipment are subjected to a large landing impact. The existing buffer system has problems such as slow response, single triggering mechanism and low system integration, and the application provides a tethered boat emergency protection device based on sodium azide (NaN3), which aims to: complete the inflation and deployment of the airbag in a very short time, meet the instantaneous buffer protection requirements of the airship under the condition of rapid descent; through the intelligent triggering mechanism of the height and descent speed double criteria, accurately identify the emergency state and avoid false triggering; use a high-energy-density gas generating agent to realize system lightweight and compactness; and protect the precise equipment through a distributed airbag layout.

[0124] Therefore, the crash protection device 100 provided by the application has the following key points.

[0125] 1. A gas generating agent is used, which is fast and light in weight.

[0126] Sodium azide (NaN3) is a mature solid propellant, and its core advantage is that the decomposition reaction speed is extremely fast. After the initial reaction is initiated by the heating wire, the decomposition of a large amount of heat will rapidly cause the remaining reaction and release a large amount of gas (mainly nitrogen).

[0127] 2. Double-criterion triggering mechanism: combined with height and descent speed, accurately identify the emergency state and avoid false triggering.

[0128] ​​​​The present application adopts "and" logic: both conditions of "ground clearance below the set value" and "vertical descent speed exceeding the set value" must be met at the same time, and the system will issue a firing command. The input of the judgment is provided by the safety control system and the laser ranging system at the same time. It ensures the necessity of triggering, reduces the probability of false triggering, and avoids unnecessary losses and risks.

[0129] 3. Lightweight and compact design.

[0130] The volume energy density is extremely high, which means that a small amount of mass and volume can store the chemical energy needed to produce a large volume of gas. According to calculations, a small amount of solid (usually about 200g) can produce enough gas volume (100L) to fill a large airbag.

[0131] In the field of aviation, "weight is cost, space is benefit". Each gram of weight reduction means longer endurance, larger payload or lower energy consumption. The lightweight and compact design of the present application makes it no longer a burden for flight, but a high-efficiency, integrable and cost-effective safety protection solution, greatly enhancing its feasibility and attractiveness in practice.

[0132] The present application also provides a floating vehicle 10000, comprising a floating main body 8; the floating vehicle 10000 further comprises the task equipment module 1000 described above, and the task equipment module 1000 is fixed to the floating main body 8.

[0133] In this embodiment, the task equipment module 1000 is integrated as a whole in the floating main body 8 of the floating vehicle 10000, forming a three-level nested scheme of boat-cabin-protection: the cabin body 6 is rigidly connected to the bottom keel of the floating main body 8 through a standard hanging point or a transition plate, so that the crash protection device 100 is located at the lowermost end of the whole boat; the control unit 3 completes two-level judgment according to the distance and speed data provided by the laser ranging module, and triggers the airbag 2 to expand at the moment before landing. Since the protection module is pre-positioned at the task equipment module 1000 level, the floating main body 8 does not need to be arranged with a buffer structure, but can rely on the airbag 2 provided by the module to absorb the first landing impact, avoid the transmission of shock waves along the skeleton to the airbag cabin or the lifting gas bag body, and reduce the risk of damage to the whole boat; at the same time, modular installation allows different tasks to quickly replace the load cabin without structural changes to the floating main body 8, realizing the synchronous improvement of safety redundancy and task adaptability of the floating vehicle 10000.

[0134] In addition, the crash protection device 100 can also be directly fixed to the floating vehicle 10000; specifically, the floating vehicle 10000 further comprises the crash protection device 100 described above, and the mounting part 1 is fixed to the floating main body 8.

[0135] ​In this embodiment, in addition to indirect installation via the task equipment module 1000, the crash protection device 100 can also be directly fixed to the airship body 8 in the form of a separate module: the mount 1 is rigidly connected to the longitudinal girder of the airship body 8 through a transition plate or keel corner piece, keeping the opening 102 facing the ground, and there is no structural obstruction in the airbag 2 deployment path.

[0136] In some cases, the airship 10000 is a dirigible.

[0137] As an option, regardless of the fixing mode of the task equipment module 1000, a distributed airbag layout can be adopted.

[0138] Specifically, the emergency protection box (crash protection device 100) is placed around the working device 7 of the equipment to be protected, such as a dual-optical pod, so that multiple airbags 2 are not concentrated in one place but distributed at the bottom of the airship, forming a buffer protection platform. This ensures that the airship can also play a certain protective role when landing in a normal attitude. The distributed airbag layout ensures that multiple airbags work together to ensure that the overall protection effect will not be significantly reduced when a single airbag fails. There is a certain fault tolerance space on the entire protection device system.

[0139] Therefore, the crash protection device 100, the task equipment module 1000, and the airship 10000 have the following advantages.

[0140] 1. Quick response: The chemical reaction is extremely fast, and the airbag is fully deployed within 50-100 milliseconds, effectively responding to emergency situations of rapid descent. This is a fundamental breakthrough that distinguishes this system from traditional mechanical or gas cylinder buffer solutions. It improves the start-up time of the buffer action from "seconds" to "milliseconds", achieving true "instant protection". The solid fuel undergoes a rapid decomposition reaction ( ) under the action of electric current, generating a large amount of nitrogen gas within 10-30 milliseconds. This is a direct chemical energy to gas kinetic energy conversion process with almost no inertia delay. In contrast to traditional gas cylinders: the high-pressure gas cylinder system needs to open the electromagnetic valve (a few milliseconds to a few tens of milliseconds), and the high-pressure gas needs to be expanded and accelerated through the pipeline (a few hundred milliseconds), the entire process is full of fluid resistance and inertia delay, and the total inflation time is usually more than 5 seconds.

[0141] Assuming that the airship is descending at an emergency landing speed of 7-10 meters per second, the system can complete the full deployment of the airbag within a very short distance before the airship touches the ground, creating the possibility of cushioning. In contrast, the traditional solution may not have inflated the airbag to half its capacity within the same time.

[0142] 2. Precise triggering: dual-criterion mechanism avoids false triggering and improves system reliability.

[0143] The control program of the system has intelligent decision-making capability, can accurately distinguish between "normal operation" and "emergency state", and thus can take decisive action when needed and remain silent when not needed.

[0144] 3. Compact structure: High energy density, system weight is reduced by more than 40% compared with traditional solutions, which fundamentally solves the stringent requirements of aircraft on safety system "lightweight" and "miniaturization". Compared with the traditional mechanical damping or carrying fan, gas cylinder, a large amount of mechanical structure and pipeline, valve and other parts are saved, which greatly reduces the number of parts, weight and space occupation ratio. The integrated light structure can be used as a standardized module without affecting the overall design.

[0145] 4. Comprehensive protection: Distributed airbag layout adapts to multiple landing attitudes and provides uniform buffering.

[0146] Compared with the traditional single-point airbag buffering, the distributed layout can improve "point buffering" to "surface buffering" and "body buffering", solving the core challenge of uncertain landing attitude. Multiple airbags are evenly distributed in the circumference to form a complete buffering protection area at the bottom of the airship. Regardless of the horizontal, inclined or lateral attitude of the airship, there is always one or more airbags in the primary impact position to start energy absorption immediately. This avoids the problem of protection failure of a single buffering structure in a non-ideal attitude. At the same time, the impact energy is shared and absorbed by multiple airbags, avoiding stress concentration and significantly reducing the peak impact overload of the main structure and internal equipment.

[0147] 5. Multi-redundant trigger safety design: Trigger condition is not single-point, avoiding single-point failure causing the entire system to fail.

[0148] The traditional mode uses GPS height triggering or manual triggering mode, ignoring the scenario of GPS or link failure in emergency state, which may cause triggering failure. In this application, there are two "or" trigger inputs for the emergency protection program trigger: A, manual trigger; B, trigger caused by the trigger of the safety control program under the automatic safety control system. Avoids the failure of triggering under link failure.

[0149] The emergency sodium azide reaction trigger program has two "and" trigger inputs: A, height reaches; B, speed reaches. Avoids false triggering and invalid triggering.

[0150] And the two trigger inputs can be provided by the safety control and laser ranging system respectively. Avoids triggering failure caused by single sensor failure.

[0151] Multiple data sources also ensure the redundancy of the trigger condition to some extent, avoiding single-point failure causing the entire system to fail, and improving the safety and reliability of the system.

[0152] It should be noted that many components mentioned in the present application are general standard components or components known to those skilled in the art, the structure and principle of which can be known by the technical personnel through technical manual or through conventional experimental method.

[0153] It should be noted that in the present specification, the relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0154] The above provides a detailed description of the crash protection device, task equipment module and airship provided by the present application. The principles and implementation modes of the present application are described by applying specific examples in this paper. The above example is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A fall protection device, characterized in that, include: The mounting component has a receiving cavity; An airbag, which can be housed in the receiving cavity, is filled with a gas generating agent; The control unit is used to determine whether to implement crash protection. When crash protection is implemented, the gas generator is activated to produce protective gas, causing the airbag to deploy under pressure.

2. The fall protection device according to claim 1, characterized in that, The gas generator includes solid sodium azide, and the protective gas includes nitrogen gas produced by the decomposition of the solid sodium azide.

3. The fall protection device according to claim 1, characterized in that, The control unit includes a heating wire that uses the thermal effect of electric current to thermally excite the gas generator.

4. The fall protection device according to claim 1, characterized in that, Also includes: A ranging module, fixed to the mounting component, is used to measure distance data to the ground; The control unit is signal-connected to the ranging module, and the control unit is used to determine whether to implement crash protection based on the distance data.

5. The fall protection device according to claim 4, characterized in that, The control unit is configured to: The system receives the distance data and calculates the speed data, then determines whether to implement crash protection based on the distance data and the speed data.

6. The fall protection device according to claim 5, characterized in that, When the control unit determines whether to implement crash protection based on the distance data and the speed data: The first step is to compare the distance data with a preset distance. If the distance data is less than the preset distance, it is determined that the first-level condition for implementing fall protection is met. The second step is to compare the speed data with the preset speed, provided that the first-level condition is met. If the speed data is greater than the preset speed, it is determined that the second-level condition for implementing crash protection is met. The third step is to implement crash protection, provided that the aforementioned secondary conditions are met.

7. The fall protection device according to claim 4, characterized in that, The ranging module includes a laser ranging module.

8. The fall protection device according to any one of claims 1 to 7, characterized in that, The control unit includes a control board and a battery; And / or, The mounting component has an opening; the fall protection device further includes: A cover plate, adhered to the opening, the cover plate being used to close the receiving cavity; The adhesive force of the cover plate is less than the force exerted when the airbag deploys.

9. A task device module, characterized in that, It includes a cabin and a crash protection device as described in any one of claims 1 to 8, wherein the mounting member is fixed to the cabin.

10. An airship, characterized in that, Including the floating main body; The buoy further includes a crash protection device as described in any one of claims 1 to 8, wherein the mounting member is fixed to the buoy body; and / or, The airship also includes the mission equipment module as described in claim 9, the mission equipment module being fixed to the airship body.

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