Modularized trimethylaluminum release device for near space wind measurement

Abstract

The invention belongs to the technical field of near space atmospheric environment in-situ detection, and particularly relates to a modularized trimethylaluminum release device for near space wind measurement, which comprises a cabin section adaptation module, a control module, a chemical solution storage tank and a high-pressure gas storage tank, the cabin section adaptation module is used for installing the chemical solution storage tank, the high-pressure gas storage tank and the control system into the same or different rocket cabin sections; and the control system is used for controlling communication between the high-pressure gas storage tank and the chemical solution storage tank, controlling the flow rate of gas pushed to the chemical solution storage tank by the high-pressure gas storage tank during communication, controlling communication between the chemical solution storage tank and the outside, and controlling the speed of spraying trimethyl aluminum to the outside by the chemical solution storage tank during communication. A traditional large-size mode is broken through, a modular assembly mode is achieved, and the rocket robot can adapt to various rockets.

Description

Technical Field

[0001] The invention belongs to the technical field of in-situ detection of near-space atmospheric environment, can detect high-altitude wind fields in-situ, and specifically relates to a modular trimethylaluminum release device for near-space wind measurement. Background Art

[0002] The near-space wind field is an important parameter of the near-space environment. At altitudes of 80 to 180 km, the measurement of high-altitude wind is difficult due to the low air density.

[0003] Visible gases are released from sounding rockets and optically tracked on the ground. This tracing technique allows for the measurement of high-altitude winds, and is the only means of in-situ detection of high-altitude wind fields. After being released, trimethylaluminum spontaneously comes into contact with oxygen, producing a pale white glow visible on the ground. This gas moves with the background atmosphere, and by releasing these vapors along the rocket trajectory and observing their "footprints" in space, it can be used to determine wind speed and direction. Trimethylaluminum is referred to as TMA.

[0004] Foreign countries have used the chemical tracer method to measure atmospheric parameters many times, and released trimethyl aluminum through sounding rockets to measure wind fields at an altitude of 80 to 180 kilometers. The existing release devices on foreign rockets are all fixed according to the rocket configuration, with large volume, chemical liquids and high-pressure gases in one integrated device, and cannot adapt to a variety of rocket models. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems of large size and low adaptability of traditional near-space wind measurement TMA release devices, thereby providing a modular trimethylaluminum release device for near-space wind measurement.

[0006] In order to solve the above technical problems, the technical solution of the present invention provides a modular trimethylaluminum release device for near-space wind measurement, which is characterized by comprising: a cabin adaptation module, a control module, and independently arranged chemical solution storage tanks and high-pressure gas storage tanks; wherein,

[0007] The compartment adaption module is used to install the chemical solution tank, the high-pressure gas tank and the control system into the same or different rocket compartments respectively;

[0008] The chemical solution storage tank is used to store trimethylaluminum solution;

[0009] The high-pressure gas storage tank is used to store gas;

[0010] The control system is connected to the chemical solution storage tank and the high-pressure gas storage tank, respectively, and is used to control the connection between the high-pressure gas storage tank and the chemical solution storage tank, and control the flow rate of the gas pushed from the high-pressure gas storage tank to the chemical solution storage tank when connected; and is used to control the connection between the chemical solution storage tank and the outside world, and control the speed of the chemical solution storage tank spraying trimethyl aluminum to the outside world when connected.

[0011] As an improvement of the above device, the gas includes: nitrogen.

[0012] As an improvement of the above device, the chemical solution storage tank and the high-pressure gas storage tank are placed according to different installation methods, including: horizontally placed side by side in the same compartment, vertically placed in the same compartment, and individually placed in different compartments.

[0013] As an improvement of the above-mentioned device, the chemical solution storage tank, the high-pressure gas storage tank and the control module are connected by pipelines; when the chemical solution storage tank and the high-pressure gas storage tank are placed horizontally side by side in the same compartment, the chemical solution storage tank and the high-pressure gas storage tank can be respectively detached and fixed to the same or their respective compartment adaptation modules; when the chemical solution storage tank and the high-pressure gas storage tank are placed vertically in the same compartment, the chemical solution storage tank and the high-pressure gas storage tank can be respectively detached and fixed to the same or their respective compartment adaptation modules; the chemical solution storage tank and the high-pressure gas storage tank are placed separately in different compartments and can be respectively detached and fixed to their respective compartment adaptation modules.

[0014] As an improvement of the above device, the high-pressure gas storage tank is filled with high-pressure gas on the ground and is fixed to the cabin adaptation module by screws.

[0015] As an improvement of the above device, the chemical solution tank is filled with the required amount of trimethylaluminum solution after calculating the amount according to the flight trajectory, and is fixed to the cabin adapter module by screws.

[0016] As an improvement of the above-mentioned device, the control module includes: a gas control subsystem and a liquid control subsystem; wherein the gas control subsystem is connected to the liquid control subsystem and the high-pressure gas tank, respectively, and includes a gas flow switch, a gas flow control module and a gas flow test module; wherein the gas flow switch is used to control the connection between the high-pressure gas tank and the chemical solution tank; the gas flow control module is used to reduce the pressure of the high-pressure gas to a predetermined pressure when the gas flow switch is turned on; the gas flow test module is used to feed back the decompression result to adjust the flow rate of the gas pushed by the high-pressure gas tank to the liquid control subsystem; the liquid control subsystem includes: a liquid nozzle switch, a liquid push switch and a liquid spray rate control module; wherein the liquid nozzle switch is used to control the connection between the gas flow test module and the chemical solution tank; the liquid push switch is used to control the connection between the chemical solution tank and the outside world; the liquid spray rate control module is used to control the speed of the chemical solution tank spraying trimethylaluminum to the outside world when the chemical solution tank is connected to the outside world.

[0017] As an improvement to the above device, the aperture of the liquid nozzle switch is adjustable, and the liquid spray rate control module controls the spray rate of the trimethylaluminum solution by adjusting the aperture of the liquid nozzle switch.

[0018] Compared with the prior art, the advantage of the present invention is that the modular trimethylaluminum release device for near-space wind measurement provided by the present invention, its chemical solution storage tank, high-pressure gas storage tank, control module and cabin adaptation module are all modular, and can be installed in parallel, vertically or through the cabin according to the size and position of the cabin. The present invention breaks through the traditional large-volume model, realizes a modular assembly method, and can be adapted to a variety of rockets. Not only can it be assembled horizontally or vertically according to the size of the rocket cabin, it can also be installed through the cabin according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a modular near-space wind measurement TMA release device provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the flow direction of trimethylaluminum solution;

[0021] Figure 3 This is a schematic diagram of the first installation method;

[0022] Figure 4 This is a schematic diagram of the second installation method;

[0023] Figure 5 This is a schematic diagram of the third installation method. DETAILED DESCRIPTION

[0024] The technical solution provided by the present invention is further illustrated below in conjunction with embodiments.

[0025] In order to break through the traditional large-volume structure, this embodiment proposes a modular near-space wind measurement TMA release device that can adapt to various compartments, such as Figure 1 As shown, it includes: a compartment adaptation module and a separated chemical solution tank, a high-pressure gas tank and a control module; the compartment adaptation module is used to install the chemical solution tank, the high-pressure gas tank and the control system into the same or different rocket compartments respectively; wherein,

[0026] The chemical solution storage tank is used to store trimethylaluminum solution;

[0027] The high-pressure gas storage tank is used to store 20-40Mpa nitrogen;

[0028] The control system is connected to the chemical solution storage tank and the high-pressure gas storage tank, respectively, and is used to control the connection between the high-pressure gas storage tank and the chemical solution storage tank, and control the flow rate of the nitrogen pushed from the high-pressure gas storage tank to the chemical solution storage tank when connected; and is used to control the connection between the chemical solution storage tank and the outside world, and control the speed of the chemical solution storage tank spraying trimethylaluminum to the outside world when connected.

[0029] Specifically, the chemical solution storage tank, the high-pressure gas storage tank and the control system can be detached and fixed to the same or respective compartment adaptation modules, and the gas circuits between the chemical solution storage tank, the high-pressure gas storage tank and the control system are connected via pipelines.

[0030] Specifically, the high-pressure gas storage tank is filled with high-pressure nitrogen on the ground and is fixed to the cabin adapter module by screws after filling.

[0031] Specifically, the chemical solution tank calculates the required amount of solution according to the flight trajectory, and then fills it on the ground. The chemical tank filled with trimethylaluminum solution is fixed to the cabin adapter module as an independent structure by screws.

[0032] Specifically, the control module includes a gas control subsystem and a liquid control subsystem.

[0033] Wherein, the gas control subsystem is connected to the liquid control subsystem and the high-pressure gas storage tank, respectively, and includes: a gas flow switch, a gas flow control module and a gas flow test module. After the gas flow switch is turned on, the high-pressure nitrogen flows out from the high-pressure gas storage tank, and is decompressed through the gas flow control module until the predetermined pressure, and the decompressed gas flows to the liquid control subsystem after passing through the gas flow test module. The function of the gas flow control module is to reduce the high-pressure nitrogen to the gas pressure required by the system through decompression. The high-pressure nitrogen flows through the gas flow control module, passes through the internal pressure reducing valve group, and reduces the high-pressure nitrogen to the pressure required by the system, and is output to the outside through the pipeline and flows to the liquid control subsystem. The function of the gas flow test module is to feed back the result of the high-pressure nitrogen after decompression to the gas control subsystem. The gas control subsystem can adjust the gas flow control module according to the actual nitrogen flow, thereby adjusting the gas pressure output of the high-pressure gas storage tank.

[0034] Specifically, the liquid control subsystem is connected to the gas control subsystem and the chemical solution storage tank, respectively, and includes a liquid nozzle switch and a liquid push switch; wherein the liquid nozzle switch is used to control the opening of the chemical solution storage tank with the outside world. When the liquid nozzle switch is turned on, the trimethylaluminum solution in the chemical solution storage tank is connected to the outside world; the liquid push switch is used to control the connection between the chemical solution storage tank and the gas control subsystem. When the liquid push switch is turned on, nitrogen is pushed into the chemical solution storage tank. One end of the liquid push switch is the trimethylaluminum solution, and the other end is high-pressure nitrogen. When the liquid push switch is turned on, the trimethylaluminum solution in the chemical solution storage tank is pushed by the high-pressure gas, so that the trimethylaluminum is pushed toward the liquid nozzle switch, and the trimethylaluminum solution is pushed toward the liquid nozzle switch until the trimethylaluminum solution is pushed out of the cabin through the liquid nozzle switch. The high-pressure nitrogen continues to push the trimethylaluminum solution, and the trimethylaluminum solution in the chemical solution storage tank can be completely pushed out of the cabin.

[0035] Specifically, the liquid nozzle switch is turned on once until the liquid is completely sprayed out of the cabin.

[0036] Specifically, the aperture of the liquid nozzle switch is adjustable, and the liquid control subsystem further comprises: a liquid spray rate control module for adjusting the aperture, and the release rate of methylaluminum is adjusted by adjusting the aperture.

[0037] The liquid spray speed control module calculates an initial speed on the ground according to the flight trajectory and adjusts the initial aperture of the liquid nozzle switch. After flying into the air, the aperture of the liquid nozzle switch is adjusted according to actual needs, thereby controlling the spray speed flow rate. Specifically, according to the flight trajectory of the sounding rocket, it is possible to determine the time to start releasing trimethylaluminum and the total duration of the release, calculate the rate of trimethylaluminum release, adjust the size of the liquid nozzle of the chemical solution storage tank, calculate the speed at which high-pressure nitrogen pushes nitrogen to the chemical solution storage tank, and adjust the gas flow control module parameters in the control module. After all parameters are adjusted, according to the actual situation of the cabin, the high-pressure gas storage tank, the chemical solution storage tank and the control module are all installed in the cabin adapter module, and each part is connected by a pipeline.

[0038] According to the working principle of releasing trimethylaluminum solution, a certain gas pressure is required to push the liquid, and the propulsion control module can push out the trimethylaluminum solution. The gas pressure is P, and the release flow rate of trimethylaluminum solution is Q. According to the density ρ of trimethylaluminum, it can be calculated that when the release flow rate is Q, the volume flow rate of trimethylaluminum is Q. V .

[0039] According to the liquid volume flow formula:

[0040] Q V =KL·A·ΔPm (Formula-1)

[0041] in the formula

[0042] Qv——Volume flow rate

[0043] m——empirical parameter

[0044] KL——coefficient, Cd is the flow coefficient, ρ is the density of the liquid

[0045] A——Orifice area

[0046] ΔP——pressure difference before and after the orifice

[0047] The aperture size Φmm, ie, the initial aperture size of the chemical solution tank nozzle module, can be calculated according to the formula.

[0048] When the driving gas pressure is P and the release aperture is Φ, the mass flow rate of the trimethylaluminum solution satisfies Q. According to the flight trajectory, the total time of the trimethylaluminum solution spraying can be calculated, and thus the total mass of the trimethylaluminum solution required can be obtained.

[0049] In order to ensure that the gas pressure P can be generated, the high-pressure gas tank needs to control the gas flow. After the high-pressure gas comes out of the high-pressure gas tank, it is pressure-regulated and fed back to the gas control subsystem through the gas flow test module. If the feedback gas pressure deviation is too large, the parameters can be adjusted again until the gas pressure is appropriate. The gas pressure pushes the liquid push switch to move the trimethylaluminum solution to the nozzle until the trimethylaluminum solution is released from the nozzle. During the rocket flight phase, the high-pressure gas continues to be output until all the trimethylaluminum solution is released from the nozzle to the outside of the cabin. During the entire rocket flight phase, the trimethylaluminum solution is released outside the cabin, forming a motion trajectory in the air. By continuously observing the trimethylaluminum trajectory in the air through the ground observation station arranged in advance, the wind field conditions at that time can be obtained.

[0050] During operation, the flow direction of high pressure gas and the flow direction of trimethylaluminum solution Figure 2 shown.

[0051] Three installation methods are shown below, but it is worth noting that other installation methods should also be within the scope of protection of this implementation. The following installation methods are only used to illustrate the technical solution of the present invention and are not limiting. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solution of the present invention does not depart from the spirit and scope of the technical solution of the present invention, and should be included in the scope of the claims of the present invention.

[0052] Figure 3 A first installation mode is shown, in which the chemical solution storage tank and the high-pressure gas storage tank are placed horizontally side by side.

[0053] Figure 4 A second installation is shown, in which the chemical solution tank and the high-pressure gas tank are placed vertically.

[0054] Figure 5 A third installation method is shown, in which the chemical solution tank and the high-pressure gas tank are installed in different compartments.

[0055] In these three installation methods, the control module is connected according to the actual situation, including the control cable connection and the control gas line connection, which can be adjusted according to the actual position. The following is an introduction to each installation method.

[0056] In the first installation method, Figure 3 As shown, the chemical solution tank and the high-pressure gas tank are placed side by side horizontally. According to the position of the compartment, both tanks are fixed to the compartment adapter module by bolts, and the control module is also fixed to the compartment adapter module according to the actual position. The high-pressure gas tank, the chemical solution tank and the control module are connected by a pipeline combination, and their reliability is determined by airtightness testing after assembly.

[0057] In the second installation method, if Figure 4 As shown, the chemical solution tank and the high-pressure gas tank are placed vertically. The high-pressure gas tank and the control module are fixed to the cabin adapter module by bolts. The chemical solution tank is fixed to the cabin adapter module and the bulkhead according to the actual cabin conditions. The high-pressure gas tank, the chemical solution tank and the control module are connected by a pipeline combination, and their reliability is determined by airtightness testing after assembly.

[0058] In the third installation method, if Figure 5 As shown, the chemical solution tank and the high-pressure gas tank are placed in different compartments. In this case, each compartment requires a compartment adapter module, which is fixed to the high-pressure gas tank and the chemical solution tank respectively. The control module is fixed to the compartment adapter module according to the actual situation in the compartment. The high-pressure gas tank, the chemical solution tank and the control module are connected by a pipeline combination, and their reliability is determined by airtightness testing after assembly.

[0059] The device can adapt to various types of rocket compartments. This device includes a chemical solution tank, a high-pressure gas tank, a control module and a compartment adapter module. The chemical solution tank and the high-pressure gas tank can be installed in a suitable compartment according to different needs. The structures are connected by a pipe combination and finally fixed on the compartment adapter module. The control module can control the chemical solution tank and the high-pressure gas tank. After the rocket flies to a certain height, the trimethylaluminum solution in the chemical solution tank is continuously pushed out of the cabin, forming a motion trajectory of the trimethylaluminum in the air. The motion trajectory of the trimethylaluminum in the air is photographed using an observation system built on the ground in advance to measure the wind in near space.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A modular trimethylaluminum release device for near-space wind measurement, characterized in that: include: The compartment adapter module, control module and independently arranged chemical solution tank and high-pressure gas tank; among which, The compartment adaption module is used to install the chemical solution tank, the high-pressure gas tank and the control system into the same or different rocket compartments respectively; The chemical solution storage tank is used to store trimethylaluminum solution; The high-pressure gas storage tank is used to store gas; The control system is connected to the chemical solution storage tank and the high-pressure gas storage tank, respectively, and is used to control the connection between the high-pressure gas storage tank and the chemical solution storage tank, and control the flow rate of the gas pushed from the high-pressure gas storage tank to the chemical solution storage tank when connected; and is used to control the connection between the chemical solution storage tank and the outside world, and control the speed of the chemical solution storage tank spraying trimethylaluminum to the outside world when connected.

2. The modular trimethylaluminum release device for near-space wind measurement according to claim 1 is characterized in that: The gas includes nitrogen.

3. The modular trimethylaluminum release device for near-space wind measurement according to claim 1 is characterized in that: The chemical solution storage tank and the high-pressure gas storage tank are placed according to different installation methods, including: horizontally placed in parallel in the same compartment, vertically placed in the same compartment, and individually placed in different compartments.

4. The modular trimethylaluminum release device for near-space wind measurement according to claim 3 is characterized in that: The chemical solution storage tank, the high-pressure gas storage tank and the control module are connected via pipelines; When the chemical solution tank and the high-pressure gas tank are placed horizontally side by side in the same compartment, the chemical solution tank and the high-pressure gas tank can be detached and fixed to the same or respective compartment adapter modules respectively; When the chemical solution tank and the high-pressure gas tank are placed vertically in the same compartment, the chemical solution tank and the high-pressure gas tank can be detached and fixed to the same or respective compartment adaptation modules respectively; The chemical solution storage tank and the high-pressure gas storage tank are placed separately in different compartments, and can be detached and fixed to their respective compartment adaptation modules.

5. The modular trimethylaluminum release device for near-space wind measurement according to claim 1 is characterized in that: The high-pressure gas storage tank is filled with high-pressure gas on the ground and is fixed to the cabin adaptation module by screws.

6. The modular trimethylaluminum release device for near-space wind measurement according to claim 1 is characterized in that: The chemical solution tank is filled with the required amount of trimethylaluminum solution after calculating the amount according to the flight trajectory, and is fixed to the cabin adaptation module by screws.

7. The modular trimethylaluminum release device for near-space wind measurement according to claim 1 is characterized in that: The control module includes: a gas control subsystem and a liquid control subsystem; wherein, The gas control subsystem is connected to the liquid control subsystem and the high-pressure gas storage tank, respectively, and includes a gas flow switch, a gas flow control module and a gas flow test module; wherein, The gas flow switch is used to control the communication between the high-pressure gas storage tank and the chemical solution storage tank; The gas flow control module is used to reduce the pressure of the high-pressure gas to a predetermined pressure when the gas flow switch is turned on; The gas flow test module is used to feed back the decompression result to adjust the flow rate of the gas pushed by the high-pressure gas storage tank to the liquid control subsystem; The liquid control subsystem includes: a liquid nozzle switch, a liquid push switch and a liquid spray speed control module; wherein, The liquid nozzle switch is used to control the communication between the gas flow test module and the chemical solution storage tank; The liquid push switch is used to control the connection and disconnection between the chemical solution storage tank and the outside world; The liquid spray speed control module is used to control the speed of spraying trimethylaluminum from the chemical solution storage tank to the outside when the chemical solution storage tank is connected to the outside.

8. The modularized trimethylaluminum release device for near-space wind measurement according to claim 7 is characterized in that: The aperture of the liquid nozzle switch is adjustable, and the liquid spray rate control module controls the spray rate of the trimethylaluminum solution by adjusting the aperture of the liquid nozzle switch.

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