A jettisonable water recovery storage system and recovery method

Abstract

A jettisonable water recovery storage system and recovery method includes a storage recovery system comprising a storage parachute buoyancy recovery device and a storage positioning assembly. The storage positioning assembly is installed in the storage parachute buoyancy recovery device. The storage parachute buoyancy recovery device ejects a parachute after receiving an ejection ignition signal. The storage positioning assembly is carried by a parachute and decelerated to the sea surface. Positioning information is sent through an antenna and a positioning module provided in the storage positioning assembly to realize water recovery of the storage.

Description

Technical Field

[0001] The invention relates to a jettisonable water recovery storage system and a recovery method, and belongs to the field of aerospace device technology design. Background Art

[0002] As a comprehensive and accurate recorder of flight data related to glider control, thermal insulation, and aerodynamics, the memory plays a crucial role in flight status monitoring and fault location. High-speed aircraft fly at high speeds, and when landing at sea, the memory's water impact protection and location recovery requirements are very high.

[0003] There are two main methods for traditional water storage recovery: one is to wrap the storage with metal protection to resist the impact of entering the water. The storage is then dropped into the sea, and an underwater positioning beacon is designed inside the storage. The storage is recovered by divers and professional salvage equipment. This method occupies less space on the aircraft, but the storage is difficult to locate, and deep-sea salvage is difficult and costly. The other method is to wrap the storage with a low-density floating structure, which eventually floats on the water surface, and uses dyes, thick smoke, etc. to assist in the search. This method is low-cost, but occupies more space on the aircraft, and the storage is difficult to locate and search. Summary of the Invention

[0004] The technical problem solved by the present invention is: in view of the various deficiencies of the traditional water-recovery storage in the current prior art, a jettisonable water-recovery storage system and a recovery method are proposed.

[0005] The present invention solves the above technical problems by the following technical solutions:

[0006] A jettisonable water recovery storage system comprises a storage parachute buoyancy recovery device and a storage positioning assembly. The storage positioning assembly is installed in the storage parachute buoyancy recovery device. The storage parachute buoyancy recovery device ejects a parachute after receiving an ejection ignition signal. The storage positioning assembly is carried by a parachute and decelerated to the sea surface. Positioning information is sent through an antenna and a positioning module provided in the storage positioning assembly to realize water recovery of the storage.

[0007] The storage parachute floating bag recovery device includes a parachute cabin, a parachute cabin cover, a catapult, a parachute, an airbag, and a gas generator. The storage positioning assembly is arranged inside the parachute cabin, the airbag is arranged inside the side wall of the parachute cabin, the parachute is arranged at the top position inside the parachute cabin, connected to the parachute cabin cover and stored through the parachute cabin cover, the catapult is arranged on the side wall of the parachute cabin, and the gas generator is arranged in the airbag. After receiving the ejection ignition signal, the catapult is activated to eject the parachute cabin cover and pull out the parachute. The parachute pulls out the storage positioning assembly and simultaneously stimulates the gas generator to inflate the airbag. The parachute drives the storage positioning assembly and the inflated airbag to descend.

[0008] The storage and positioning combination includes a storage module and a positioning module. The storage module stores data. After the storage and positioning combination is pulled out by a parachute and lands, the positioning module sends real-time location information to the outside through a short message to realize the recovery of the storage module.

[0009] The parachute cabin is a cylindrical structure, the parachute adopts a cross-shaped parachute, the airbag is in a circular ring shape, and is arranged in the parachute cabin wall. It is formed by heat-sealing Oxford cloth and reinforced by an aramid ring sleeve. Antennas are set on both sides of the airbag. When the parachute cabin drifts on the sea surface, wireless signals are transmitted outward through the antenna.

[0010] The gas generator includes a delay component, a firing component, a gas generator shell, a charge, a nozzle, a coolant, and a tail cover. After the parachute pops out of the gas generator, the parachute applies tension to the firing component and triggers the delay component. After a preset time, the charge is ignited to generate gas that flows into the coolant through the nozzle. The gas is cooled by the coolant and then filled into the airbag. The gas generator shell and the shell are sealed by the tail cover.

[0011] The working mode of the storage module is erase first and then write. When receiving an external recording instruction, it starts erasing data from the first address. After erasing, it is locked in the recording state and does not respond to any instructions. When the storage module receives data, it starts writing from the first address and automatically stops when the data is full.

[0012] The positioning module uses GPS and Beidou positioning information in the form of Beidou short messages and sends them through the antenna. The positioning module is equipped with dual redundant lithium batteries for independent power supply. After the storage positioning combination is popped out with the parachute, the positioning information is refreshed in real time at a specified frequency. If the positioning information is valid, the positioning information is sent immediately; after landing on the sea surface, it enters a low-power sleep mode, presets the power-on time interval, and works for a preset time after powering on, completing the positioning and sending of position coordinate information during the power-on period.

[0013] A recovery method implemented by a jettisonable water recovery storage system comprises:

[0014] The ejector of the parachute float device of the storage device receives the ejection ignition signal from the control system and ejects the parachute canopy;

[0015] The canopy pulls out the parachute, and the storage positioning assembly is pulled out by the tension of the parachute, while the tension of the parachute is used to activate the airbag gas generator;

[0016] After the gas generator is activated, the airbag is inflated after a delay;

[0017] The parachute carries the storage and positioning assembly and the airbag, decelerating and landing on the sea surface. The storage and positioning assembly relies on the buoyancy of the airbag to float on the sea surface and maintain a vertical posture, with the antenna end surface exposed above the water surface;

[0018] The internal battery of the storage and positioning combination supplies power to the positioning module, which sends its own positioning information in the form of Beidou short messages through the passive antenna;

[0019] After the positioning module successfully locates and sends the positioning information, it enters a low-power sleep mode and completes the positioning and position coordinates transmission during each startup;

[0020] The search device is used to determine the position of the stored positioning combination and the position change between the two positions through two consecutive received positioning information, and to carry out the search and recovery of the stored positioning combination.

[0021] The working mode of the storage module is erase first and then write. When receiving an external recording instruction, it starts erasing data from the first address. After erasing, it is locked in the recording state and does not respond to any instructions. When the storage module receives data, it starts writing from the first address and automatically stops when the data is full.

[0022] The positioning module uses GPS and Beidou positioning information in the form of Beidou short messages and sends them through the antenna. The positioning module is equipped with dual redundant lithium batteries for independent power supply. After the storage positioning combination is popped out with the parachute, the positioning information is refreshed in real time at a specified frequency. If the positioning information is valid, the positioning information is sent immediately; after landing on the sea surface, it enters a low-power sleep mode, presets the power-on time interval, and works for a preset time after powering on, completing the positioning and sending of position coordinate information during the power-on period.

[0023] The advantages of the present invention compared with the prior art are:

[0024] The present invention provides a jettisonable water recovery storage system and recovery method, which occupy a small space inside the aircraft and are light in weight. They adopt the means of "parachute deceleration + airbag floating + wireless positioning" and have high reliability. At the same time, the storage and positioning combination is designed to be cylindrical and covered with airbags, and antennas are designed on both sides. When the product floats on the sea, it is ensured that no matter how the product rolls under the influence of waves, the product has an antenna facing upward to reliably send out wireless signals; at the same time, the storage and positioning combination module is internally encapsulated and the circuit is designed to prevent short circuits, ensuring that the product can operate normally even if a short circuit occurs after entering the water; the product has dual redundant lithium batteries inside to ensure reliable power supply after separation from the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the storage parachute buoyancy bag recovery device provided for the invention;

[0026] Figure 2 A schematic diagram of the working process of the jettisonable floating storage system provided by the invention;

[0027] Figure 3 A schematic diagram of the storage positioning combination provided for the invention;

[0028] Figure 4 A schematic diagram of the power supply interface circuit of the positioning module provided by the invention; DETAILED DESCRIPTION

[0029] A jettisonable water recovery storage system and recovery method includes a storage recovery system comprising a storage parachute buoyancy recovery device and a storage positioning assembly. The storage positioning assembly is installed in the storage parachute buoyancy recovery device. The storage parachute buoyancy recovery device ejects a parachute after receiving an ejection ignition signal. The storage positioning assembly is carried by a parachute and decelerated to the sea surface. Positioning information is sent through an antenna and a positioning module provided in the storage positioning assembly to realize water recovery of the storage.

[0030] Specifically, the storage parachute floating bag recovery device includes a parachute cabin, a parachute cabin cover, a catapult, a parachute, an airbag, and a gas generator. The storage positioning assembly is arranged inside the parachute cabin, an airbag is arranged in the side wall of the parachute cabin, the parachute is arranged at the top position inside the parachute cabin, connected to the parachute cabin cover and stored through the parachute cabin cover, a catapult is arranged on the side wall of the parachute cabin, and a gas generator is arranged in the airbag. After receiving the ejection ignition signal, the catapult is actuated to eject the parachute cabin cover and pull out the parachute. The parachute pulls out the storage positioning assembly and simultaneously stimulates the gas generator to inflate the airbag. The parachute drives the storage positioning assembly and the inflated airbag to descend.

[0031] The storage and positioning assembly includes a storage module and a positioning module. The storage module stores data. After the storage and positioning assembly is pulled out by the parachute and lands, the positioning module sends the real-time location information to the outside via a short message to realize the recovery of the storage module.

[0032] The parachute cabin is a cylindrical structure, the parachute adopts a cross-shaped parachute, and the airbag is in a ring shape. It is set in the parachute cabin wall. It is formed by heat-sealing Oxford cloth and reinforced with aramid rings. Antennas are set on both sides of the airbag. When the parachute cabin drifts on the sea surface, the antennas transmit wireless signals outward.

[0033] The gas generator includes a delay assembly, a firing assembly, a gas generator housing, a charge, a nozzle, a cooling agent, and a tail cover. After the parachute is ejected, the parachute applies tension to the firing assembly and triggers the delay assembly. After a preset time, the charge is ignited to generate gas that flows into the cooling agent through the nozzle. The gas is cooled by the cooling agent and then filled into the airbag. The gas generator housing and the housing are sealed by the tail cover.

[0034] The working mode of the storage module is erase first and write later. When receiving the external record command, it starts erasing data from the first address. After erasing, it is locked in the recording state and does not respond to any other commands. When the storage module receives data, it starts writing from the first address and stops automatically when the data is full.

[0035] The positioning module uses GPS and Beidou positioning information in the form of Beidou short messages and sends them through the antenna. The positioning module is equipped with dual redundant lithium batteries for independent power supply. After the storage positioning combination is ejected with the parachute, the positioning information is refreshed in real time at a specified frequency. If the positioning information is valid, the positioning information is sent immediately. After landing on the sea surface, it enters a low-power sleep mode with a preset power-on time interval and a preset working time after power-on. During the power-on period, the positioning and position coordinate information are sent.

[0036] The specific workflow is:

[0037] The ejector of the parachute float device of the storage device receives the ejection ignition signal from the control system and ejects the parachute canopy;

[0038] The canopy pulls out the parachute, and the storage positioning assembly is pulled out by the tension of the parachute, while the tension of the parachute is used to activate the airbag gas generator;

[0039] After the gas generator is activated, the airbag is inflated after a delay;

[0040] The parachute carries the storage and positioning assembly and the airbag, decelerating and landing on the sea surface. The storage and positioning assembly relies on the buoyancy of the airbag to float on the sea surface and maintain a vertical posture, with the antenna end surface exposed above the water surface;

[0041] The internal battery of the storage and positioning combination supplies power to the positioning module, which sends its own positioning information in the form of Beidou short messages through the passive antenna;

[0042] After the positioning module successfully locates and sends the positioning information, it enters a low-power sleep mode and completes the positioning and position coordinates transmission during each startup;

[0043] The search device is used to determine the position of the stored positioning combination and the position change between the two positions through two consecutive received positioning information, and to carry out the search and recovery of the stored positioning combination.

[0044] The following is further described in conjunction with the accompanying drawings and preferred embodiments:

[0045] In the current embodiment, the jettisonable water recovery storage system mainly includes a storage parachute buoyancy recovery device and a storage positioning assembly. The storage positioning assembly is installed in the storage parachute buoyancy recovery device. The storage parachute buoyancy recovery device consists of a parachute cabin, a parachute cabin cover, a catapult, a parachute, an airbag, a gas generator, etc. Figure 1 As shown, the storage positioning assembly is connected to the parachute via a parachute rope, and the parachute and the parachute canopy are connected via a rope.

[0046] a) The working process of the jettisonable floating storage system is as follows: Figure 2As shown, the ejector of the storage parachute floating bag device receives the ejection ignition signal from the control system and ejects the parachute canopy at a speed greater than 7m / s.

[0047] b) The canopy pulls out the parachute, which in turn pulls out the storage positioning assembly by the force of the parachute, and also uses the force of the parachute to activate the airbag gas generator;

[0048] c) After the gas generator is activated, there is a 5-second delay before the airbag is inflated;

[0049] d) The parachute carrying the storage and positioning assembly and the airbag decelerates the descent, eventually landing on the sea at a speed no greater than 15m / s. The storage and positioning assembly floats on the sea surface by the buoyancy of the airbag and maintains an upright posture, with the antenna end surface exposed above the water surface;

[0050] e) The internal battery of the storage and positioning combination supplies power to the positioning module, which uses RNSS and RDSS integrated positioning communication technology to send its own positioning information in the form of Beidou short messages through the passive antenna;

[0051] f) After the positioning module successfully locates and sends the positioning information, it enters a low-power sleep mode and starts up once every 4 minutes. Each startup lasts for 2 minutes. During the startup period, the positioning and position coordinates are sent;

[0052] g) The search handset determines the position of the stored positioning combination and the position change between the two positions through two consecutive positioning information received, and conducts the search and recovery of the stored positioning combination;

[0053] The storage parachute floating bag recovery device consists of a parachute cabin, a parachute cabin cover, a catapult, a parachute, an air bag, a gas generator, etc., among which:

[0054] a) The parachute compartment is designed to be cylindrical to ensure that the storage can be pulled out smoothly.

[0055] b) The parachute adopts a cross-shaped parachute. The cross parachute can work stably within 1.5Ma, has good inflation performance, small swing angle during deceleration, and good stability. Based on the weight of the cargo-parachute system of 4kg and the terminal speed of 15m / s, the drag area of ​​the cross parachute is 0.284m 2 , taking the drag coefficient as 0.66 and the nominal area of ​​the parachute as 0.43m 2 .

[0056] c) The airbag is in a circular shape, similar to a lifebuoy structure, with an inner diameter of 80mm and an outer diameter of 350mm. The filled volume is 6L. The airbag body is formed by heat-sealing Oxford cloth, and aramid rings are used to reinforce weak parts of the structure.

[0057] d) The gas generator consists of a delay assembly, a firing assembly, a gas generator housing, a charge, a nozzle, a cooling agent, a tail cover and other structures. When inflation is required, a pulling force greater than 100N is applied to the firing assembly to trigger the delay device. After a delay of 3.5s, the delay device ignites the ignition powder and then ignites the gas generating powder. The gas generated by the combustion of the gas generating powder flows into the cooling agent through the nozzle. After the gas is cooled by the cooling agent, it is filled into the airbag at a temperature not exceeding 200°C to achieve airbag inflation.

[0058] The storage and positioning combination contains storage modules and positioning modules. See the schematic diagram for the composition. Figure 2 , completing data storage, and after the ejection tube is ejected and positioning is successful, the real-time location information is sent to the ground search device via a short message. The received location information can be used to quickly and accurately determine the coordinates of the stored landing point. To ensure the product can reliably transmit wireless positioning signals, the product is designed in a cylindrical shape with an airbag on the outer surface and antennas on both sides. When the product floats on the sea surface, it ensures reliable transmission of wireless signals.

[0059] a) The memory module uses an erase-before-write mode. After power-up, it is in the "idle" state. When it receives a "record" command, it erases data starting from the first address. After erasing, it locks into the recording state and no longer responds to any further commands. When the memory receives data, it writes data starting from the first address and automatically stops when the data is full. The memory erase time is less than 10 seconds, and the maximum write speed is no less than 60MByte / s, which meets the requirements.

[0060] b) The positioning module uses RNSS and RDSS integrated positioning communication technology to send its own GPS and Beidou positioning information in the form of Beidou short messages through the passive antenna. Each positioning module has its own dual redundant lithium batteries to ensure reliable power supply after separation from the aircraft. The power supply interface circuit is as follows: Figure 4 After the positioning module pops up, the device refreshes the positioning information in real time at a frequency of 1 second. If the positioning information is valid, it will be sent immediately. It then enters a low-power sleep mode and restarts every 4 minutes. Each startup lasts for 2 minutes. During the startup period, positioning and position coordinates are sent.

[0061] c) After the entire device falls into water, there is no external +12V and +5V power supply, and there is no battery inside the storage module. A short circuit of the interface will not damage the internal circuit. The external interface of the positioning device includes the RS422 transceiver interface and the +12V power supply interface. Considering that all external interfaces are short-circuited together, the 422 output software control interface outputs high impedance, and a short circuit of the 422 input has no effect. A diode is connected in series with the +12V power supply end, and the internal battery power supply will not be output. Therefore, after the interface is short-circuited, the device can still work normally. Figure 3 shown.

[0062] The design proposed in this embodiment occupies a small space inside the aircraft, only Ø120mm×350mm, and is light in weight, with the product weighing no more than 4kg. It adopts the "parachute deceleration + airbag flotation + wireless positioning" method, which has high reliability. At the same time, the storage and positioning combination is designed into a columnar shape with an airbag on the outer cover, and antennas are designed on both sides. When the product floats on the sea surface, it ensures that no matter how the product rolls under the influence of waves, the product has an antenna facing upward to reliably send out wireless signals. The storage and positioning combination module is potted inside and the circuit is designed to prevent short circuits, ensuring that the product can operate normally even if a short circuit occurs after entering water. The product has dual redundant lithium batteries inside to ensure reliable power supply after separation from the aircraft.

[0063] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

[0064] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A jettisonable water recovery storage system, characterized by: It includes a storage parachute buoyancy recovery device and a storage positioning assembly. The storage positioning assembly is installed in the storage parachute buoyancy recovery device. After receiving the ejection ignition signal, the storage parachute buoyancy recovery device ejects the parachute. The storage positioning assembly is carried by the parachute and decelerated to the sea surface. The antenna and positioning module provided in the storage positioning assembly send positioning information to realize the water recovery of the storage. The storage parachute floating bag recovery device includes a parachute cabin, a parachute cabin cover, a catapult, a parachute, an airbag, and a gas generator. The storage positioning assembly is arranged inside the parachute cabin, the airbag is arranged in the side wall of the parachute cabin, the parachute is arranged at the top position of the parachute cabin, connected to the parachute cabin cover and stored through the parachute cabin cover, the catapult is arranged on the side wall of the parachute cabin, and the gas generator is arranged in the airbag. After receiving the ejection ignition signal, the catapult is actuated to eject the parachute cabin cover and pull out the parachute. When the parachute pulls out the storage positioning assembly, the gas generator is activated to inflate the airbag. The parachute drives the storage positioning assembly and the inflated airbag to descend. The storage and positioning assembly includes a storage module and a positioning module. The storage module stores data. After the storage and positioning assembly is pulled out by the parachute and lands, the positioning module sends the real-time location information to the outside via a short message to realize the recovery of the storage module. The parachute cabin is a cylindrical structure, the parachute adopts a cross-shaped parachute, the airbag is in a circular ring shape, and is arranged in the parachute cabin wall. It is formed by heat-sealing Oxford cloth and reinforced by an aramid ring sleeve. Antennas are set on both sides of the airbag. When the parachute cabin drifts on the sea surface, wireless signals are transmitted outward through the antenna.

2. The jettisonable water recovery storage system according to claim 1, characterized in that: The gas generator includes a delay component, a firing component, a gas generator shell, a charge, a nozzle, a coolant, and a tail cover. After the parachute pops out of the gas generator, the parachute applies tension to the firing component and triggers the delay component. After a preset time, the charge is ignited to generate gas that flows into the coolant through the nozzle. The gas is cooled by the coolant and then filled into the airbag. The gas generator shell and the shell are sealed by the tail cover.

3. The jettisonable water recovery storage system according to claim 2, characterized in that: The working mode of the storage module is erase first and then write. When receiving an external recording instruction, it starts erasing data from the first address. After erasing, it is locked in the recording state and does not respond to any instructions. When the storage module receives data, it starts writing from the first address and automatically stops when the data is full.

4. The jettisonable water recovery storage system according to claim 3, characterized in that: The positioning module uses GPS and Beidou positioning information in the form of Beidou short messages and sends them through the antenna. The positioning module is equipped with dual redundant lithium batteries for independent power supply. After the storage positioning combination is popped out with the parachute, the positioning information is refreshed in real time at a specified frequency. If the positioning information is valid, the positioning information is sent immediately; after landing on the sea surface, it enters a low-power sleep mode, presets the power-on time interval, and works for a preset time after powering on, completing the positioning and sending of position coordinate information during the power-on period.

5. A recovery method implemented by the jettisonable water recovery storage system according to claim 4, characterized in that include: The ejector of the parachute float device of the storage device receives the ejection ignition signal from the control system and ejects the parachute canopy; The canopy pulls out the parachute, and the storage positioning assembly is pulled out by the tension of the parachute, while the tension of the parachute is used to activate the airbag gas generator; After the gas generator is activated, the airbag is inflated after a delay; The parachute carries the storage and positioning assembly and the airbag, decelerating and landing on the sea surface. The storage and positioning assembly relies on the buoyancy of the airbag to float on the sea surface and maintain a vertical posture, with the antenna end surface exposed above the water surface; The internal battery of the storage and positioning combination supplies power to the positioning module, which sends its own positioning information in the form of Beidou short messages through the passive antenna; After the positioning module successfully locates and sends the positioning information, it enters a low-power sleep mode and completes the positioning and position coordinates transmission during each startup; The search device is used to determine the position of the stored positioning combination and the position change between the two positions through two consecutive received positioning information, and to carry out the search and recovery of the stored positioning combination.

6. A recycling method according to claim 5, characterized in that: The working mode of the storage module is erase first and then write. When receiving an external recording instruction, it starts erasing data from the first address. After erasing, it is locked in the recording state and does not respond to any instructions. When the storage module receives data, it starts writing from the first address and automatically stops when the data is full.

7. A recycling method according to claim 6, characterized in that: The positioning module uses GPS and Beidou positioning information in the form of Beidou short messages and sends them through the antenna. The positioning module is equipped with dual redundant lithium batteries for independent power supply. After the storage positioning combination is popped out with the parachute, the positioning information is refreshed in real time at a specified frequency. If the positioning information is valid, the positioning information is sent immediately; after landing on the sea surface, it enters a low-power sleep mode, presets the power-on time interval, and works for a preset time after powering on, completing the positioning and sending of position coordinate information during the power-on period.

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