Nitrogen blowing protection equipment for micro-channel plate

Abstract

The invention discloses microchannel plate nitrogen blowing protection equipment which comprises a protective cover, a nitrogen blowing opening, a pressing device, an unfolding device, a power supply subsystem and a control subsystem, wherein the protective cover and the nitrogen blowing opening are integrally designed; the protective cover covers the head of the sensor and is consistent with the head of the sensor in shape; the nitrogen blowing port blows nitrogen into the sensor in a ground test stage to prevent pollution; the blocking cap is used for blocking before the satellite is launched to prevent dust pollution; when the system is in a protection state, the pressing device presses the protective cover and the head of the sensor, and the protective cover is released through thermal cutting according to an instruction of the control subsystem; the unfolding device is matched with the pressing device to achieve unfolding of the protective cover, and the protective cover is locked after being released to a designated position. The power supply subsystem supplies power to the pressing device according to an instruction of the control subsystem; the control subsystem periodically collects state monitoring parameters and transmits the state monitoring parameters to the load management unit, controls power-on and power-off of the pressing device according to a ground remote control instruction, and executes unfolding operation of the system.

Description

[0001] This application is a divisional application of the invention application with application number "2025106542011", the invention name is "Spaceborne intelligent protection system for plasma detector", and the application date is May 21, 2025. TECHNICAL FIELD

[0002] The technical field relates to a space plasma detection key technology, in particular to a microchannel plate nitrogen blowing protection device. BACKGROUND

[0003] The microchannel plate (MCP) is used as a core component inside a plasma detector sensor for detecting a space environment, for amplifying input charges, and outputting to a back-end scientific data acquisition electronics, and finally realizing measurement and analysis of charged particles in the space environment. The structure of the MCP is composed of a large number of micro-holes, and the inner surface of the micro-hole is coated with a coating with a high secondary electron emission coefficient.

[0004] The MCP has hydrophilicity, and the surface coating is fragile, the micro-holes are easy to be blocked, and it is very sensitive to environmental cleanliness. The volatile water vapor, carbon dioxide and other gases in the atmospheric environment, non-volatile pollutants such as oil and other hydrocarbon molecules, and large dust particles (greater than the microchannel aperture) will all pollute the MCP, causing performance degradation or shortened service life, and seriously affecting the realization of scientific detection targets of the plasma detector. Therefore, the design of the protection measures for the MCP is an important link to ensure the normal detection of the plasma detector.

[0005] Although the final detection condition of the plasma detector is the space vacuum environment, it needs to be exposed to the atmospheric environment for testing during the ground test stage, and the water vapor, carbon dioxide and the like in the atmospheric environment will pollute the MCP; in addition, some dust raising actions after the satellite is launched will inevitably cause a large amount of dust and other pollutants in the surrounding environment to enter the instrument, causing the MCP to be polluted.

[0006] Therefore, it is necessary to invent a sensor protection system for the plasma detector to protect the sensor during the ground test stage and the initial stage of entering the orbit. In addition, as the core component of the plasma detector, only when the sensor effectively receives the charged particles in the space environment can the related scientific detection be realized, so the protection system needs to have extremely high reliability to ensure that it is normally opened during the scientific detection period and remains in the opened state for a long time. SUMMARY

[0007] The purpose of the present application is to overcome the defects of the prior art, and a microchannel plate nitrogen blowing protection device is provided.

[0008] Therefore, the application provides a micro-channel plate nitrogen blowing protection device, which comprises a micro-channel plate, an integrated protective cover and a nitrogen blowing port, and a pressing device, an unfolding device, a power supply system and a control subsystem.

[0009] The micro-channel plate is a core component inside a sensor of a space environment detection plasma detector, is used for amplifying input charges, and is connected to a rear-end scientific data acquisition electronics to finally realize measurement and analysis of charged particles in a space environment.

[0010] The protective cover is arranged on the sensor head, has a shape consistent with that of the sensor head, and has a size greater than that of the sensor head.

[0011] The nitrogen blowing port is used for continuously blowing nitrogen into the sensor during a ground test stage, effectively reduces the content of contaminated gas around the micro-channel plate, and thus achieves the purpose of preventing the micro-channel plate from being contaminated.

[0012] The pressing device is used for pressing the protective cover and the sensor head when the system is in a protection state, and is also used for releasing the protective cover in a hot cutting mode according to an instruction of the control subsystem.

[0013] The unfolding device is used for unfolding the protective cover in cooperation with the pressing device, and is used for locking the protective cover after the protective cover is released to a specified position.

[0014] The power supply system is used for supplying power to the pressing device according to an instruction of the control subsystem.

[0015] The control subsystem is used for periodically collecting state monitoring parameters and transmitting the state monitoring parameters to a load management unit, and is also used for controlling on-off of the pressing device according to a ground remote control instruction received by the load management unit, and performing an unfolding operation of the system.

[0016] The control subsystem comprises a heating wire power-on and power-off control module and a state monitoring module.

[0017] The heating wire power-on and power-off control module is used for generating a power-on signal according to a power-on instruction, and generating a power-off signal according to a power-off instruction or an internal timing power-off flag.

[0018] The state monitoring module is used for collecting voltages of a monitoring point of a protection circuit, a monitoring point of a temperature of the pressing device, and a monitoring point of the unfolding device, and buffering the voltages to a data buffer area.

[0019] The processing process of the heating wire power-on and power-off control module comprises the following steps.

[0020] When receiving the power-on instruction A, a first heating wire power-on signal is generated;

[0021] When receiving the power-on instruction B, a second heating wire power-on signal is generated;

[0022] When receiving the power-on instruction C, a signal for simultaneously powering on the two groups of heating wires is generated;

[0023] When receiving the power-off instruction, a signal for simultaneously powering off the two groups of heating wires is generated;

[0024] When no power-off instruction is received and the power-on duration has reached the power-on duration stored in the control parameter storage area, a signal for simultaneously powering off the two groups of heating wires is generated;

[0025] When no power-off instruction is received, the heating wire power-on time does not reach the power-on duration stored in the storage area, but has reached the maximum duration set internally, a signal for simultaneously powering off the two groups of heating wires is generated;

[0026] The state monitoring module controls the AD converter to periodically collect the voltage of the monitoring point; the monitoring point includes: a protection circuit state monitoring point, a protection system temperature monitoring point and a protection system deployment state monitoring point; wherein,

[0027] The protection circuit state monitoring point is a protection circuit monitoring point branched from the first path of the power supply system fuse path;

[0028] The protection system temperature monitoring point is a monitoring point branched from the middle of the thermistor and the 4.7kΩ resistor in series, wherein the thermistor is MF5802, and the 4.7kΩ resistor is pulled up to 5V in series;

[0029] The protection system deployment state monitoring point is a monitoring point branched from the middle of the microswitch and the 4.7kΩ resistor in series, wherein the microswitch and the 4.7kΩ resistor are pulled up to 5V in series;

[0030] The control subsystem further comprises an instruction receiving and analyzing module and a data packaging and sending module, wherein,

[0031] The instruction receiving and analyzing module is used to receive ground remote control instructions, the ground remote control instructions include power-on instructions, power-off instructions and satellite attitude information, and the power-on instructions and the power-off instructions are sent to the heating wire power-off control module, and the satellite attitude information is sent to the data packaging and sending module;

[0032] The data packaging and sending module is used to obtain the state monitoring parameters collected by the sensor from the cache area, and the satellite attitude information is packaged and sent to the payload management unit through RS422 according to the set period, and is transmitted to the ground.

[0033] Preferably, the compression device comprises a fiber rope, an accessory and a power heating cutting device;

[0034] The fiber rope and the accessory are used to generate a compression force to resist the unfolding force moment generated by the unfolding device, so as to compress the protective cover and the sensor head;

[0035] The power heating cutting device is used to melt the fiber rope by heating when the system performs the unfolding operation, so as to remove the resisting moment generated by the compression device and release the protective cover;

[0036] Two groups of independent heating wires are arranged in the power heating cutting device, so as to realize three kinds of heat cutting modes including separately electrifying each group of heating wires and simultaneously electrifying the two groups of heating wires.

[0037] Preferably, the power supply system comprises a short-circuit protection circuit and a magnetic latching relay on-off control module, wherein,

[0038] The short-circuit protection circuit adopts two groups of unbalanced parallel fusing paths with the same structure, wherein each group of fusing paths comprises two parallel branches, the first branch is two 1Ω / 1W resistors connected in parallel and connected in series with an MGA-S-125V-2.1A fuse, and the second branch is an MGA-S-125V-2.1A fuse; in the first branch, a protection circuit monitoring point is led out from the connection point of the two resistors and the fuse;

[0039] The magnetic latching relay on-off control module comprises two 2JB2-1-5B magnetic latching relays, which are connected in series with each group of fusing paths and correspond to one group of heating wires in the power heating cutting device, respectively, and are used to independently control the power-on and power-off of the heating wires in the power heating cutting device according to the control signal of the control subsystem.

[0040] Preferably, the unfolding device comprises a spring hinge, a limiting device and a dust cover, wherein,

[0041] The spring hinge is used to generate a driving moment to pop up the protective cover and lock after the protective cover is unfolded to a specified position;

[0042] The limiting device is used to ensure that the locking hook is locked after the protective cover is unfolded to the position, so as to avoid the rebound of the protective cover after being unfolded;

[0043] The dust cover is used to avoid the space dust and pollutants from entering the spring hinge, so as to avoid the jamming of the spring hinge and affect the unfolding of the protection system.

[0044] Compared with the prior art, the advantages of the present application are that:

[0045] 1. The micro-channel plate nitrogen blowing protection equipment is designed, a nitrogen blowing port is designed for ground test requirements, nitrogen blowing protection can be realized for the MCP during the ground test stage; a star state monitoring and remote control deployment system is designed for the dust environment during launching and the initial stage of entering the orbit, and the protection system can be deployed on the orbit under the condition that the environment state is good.

[0046] 2. Different backup schemes are designed for the power-on deployment of the protection system and the power-off after deployment, two independent power supply systems and two independent heating wires are designed for the heating wire used for deployment, and three different power-on schemes can be realized; after deployment, three different power-off schemes are designed for the power-off of the heating wire in the control system. Different schemes are designed for power-on and power-off, which can effectively ensure the smooth and safe deployment of the protection system on the orbit. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 It is a micro-channel plate nitrogen blowing protection equipment block diagram;

[0048] Figure 2 It is a plasma detector with an intelligent protection system on the star;

[0049] Figure 3 It is a power supply system principle block diagram;

[0050] Figure 4 It is a control subsystem principle block diagram;

[0051] Figure 5 It is a heating wire power-on and power-off flowchart. DETAILED DESCRIPTION

[0052] The micro-channel plate nitrogen blowing protection equipment overcomes the problem that the MCP is easily polluted by water vapor, carbon dioxide, oil and other carbon hydrocarbon molecules, large dust particles and the like in the working environment, causing the detection performance of the plasma detector to decrease or be lost, and a micro-channel plate nitrogen blowing protection equipment is proposed.

[0053] The shape of the micro-channel plate nitrogen blowing protection equipment is consistent with the shape of the sensor head, the edge is tightly attached to the sensor head, and the protective cover is covered on the sensor head. A small nitrogen blowing port is designed at the top of the protection system to realize atmospheric pollution protection. Nitrogen blowing is an effective method to prevent MCP from being polluted, during the ground atmospheric environment test stage, dry and clean high-purity nitrogen gas is continuously blown into the sensor through the nitrogen blowing port, which can effectively reduce the content of polluted gas around the MCP, so as to achieve the purpose of MCP pollution prevention. Before the satellite is launched, the nitrogen blowing is stopped, and the nitrogen blowing port is sealed with a protective cap, so as to achieve the protection purpose of the sensor during the ground test and the initial stage of entering the orbit. After the satellite enters the orbit, the vacuum degree and cleanliness of the surrounding environment reach the working conditions of the plasma detector, and the intelligent protection system is automatically deployed to the specified position through the ground injection remote control instruction control.

[0054] The microchannel plate nitrogen blowing protection device comprises a protective cover, a nitrogen blowing port, a pressing device, a deployment device, a power supply system and a control system. In an environment with a pollution source, the intelligent protection system is closed, the protective cover is closely combined with the sensor, and the pressing device is locked. The control system periodically collects and returns state monitoring parameters, and the ground control system judges the environment state to reach the sensor index requirements of the plasma detector. After a remote control command is injected from the ground, the control system controls the power supply system to supply power to the pressing device according to the received command, and the pressing device and the deployment device cooperate to realize the deployment of the protection system.

[0055] The pressing device comprises a power heating cutting device, two groups of independent heating wires in the device can realize three different ways of thermal cutting (heating wire 1 is powered alone, heating wire 2 is powered alone, and heating wire 1 and heating wire 2 are powered at the same time), and the power supply system is designed with an independent protection circuit and a power-on and power-off control module. The protection system is designed with temperature monitoring points and deployment state monitoring points on the pressing device, and a protection circuit state monitoring point in the power supply system. The control system periodically collects monitoring parameters and packages them together with satellite attitude information received from the load management unit for downward transmission. After the satellite is launched into orbit, relevant control decisions can be made according to the monitoring state parameters and satellite attitude information to control the deployment of the protection system.

[0056] The technical solutions of the present application will be described in detail below in combination with the drawings and examples.

[0057] Examples

[0058] The embodiment of the present application provides a microchannel plate nitrogen blowing protection device, which comprises a protective cover, a nitrogen blowing port, a pressing device, a deployment device, a power supply system and a control system. As shown in Figure 1 , Figure 2 .

[0059] The protective cover is consistent in shape with the sensor head, and the outer dimension is slightly larger than the outer contour of the sensor. In the closed state, the protective cover is closely combined with the sensor, and the pressing device is in the pressing state.

[0060] The nitrogen blowing port and the protective cover are integrally processed, and the nitrogen blowing port is a hollow cylindrical body with a certain length. In actual use, after the nitrogen blowing port is connected with the nitrogen blowing pipeline, nitrogen can be injected into the protective cover. In order to realize that the nitrogen blowing pipeline is not easy to loosen after being connected with the nitrogen blowing port, a thread shape is designed on the outside of the hollow cylindrical body of the nitrogen blowing port, which can effectively improve the friction coefficient and increase the resistance.

[0061] The compacting device comprises a fiber rope, a power heating cutting device and its accessories. The main function of the compacting device is to generate a compacting force by using the fiber rope and the accessories to resist the deployment torque generated by the deployment device when the intelligent protection system on the plasma probe satellite is in the protection (closed) state, so as to compact the protective cover and the sensor head. When the intelligent protection system on the plasma probe satellite needs to perform the deployment operation, the power heating cutting device generates heat to melt the fiber rope, so as to release the compacting torque generated by the compacting device and achieve the purpose of releasing the protective cover. The power heating cutting device has main and standby heating wires inside, and the two heating wires are independently powered, so as to realize the functions of single heating wire heating and two heating wires heating at the same time.

[0062] The deployment device comprises a spring hinge, a limiting device and a dust cover, and the main function thereof is to generate a driving torque. After the compacting device is unlocked, the spring hinge generates a driving torque to pop the protective cover, and the limiting device locks the protective cover after the protective cover is deployed to the specified position. The spring hinge designed by the device has a driving torque greater than 3 times the self-resistance torque of the spring hinge, and the limiting device can ensure that the locking hook is locked after the protective cover is deployed to the position, so as to avoid the rebound of the protective cover after deployment. In order to avoid the influence of lunar dust and space dust on the deployment device, a dust cover is specially designed for the deployment device.

[0063] As shown in Figure 3 , the power supply system mainly provides a power supply for the power heating cutting device of the compacting device, and has a short-circuit protection circuit, a protection circuit monitoring point and a magnetic latching relay on-off control module. The short-circuit protection circuit realizes the short-circuit protection function by using two groups of unbalanced parallel fusing paths. The fusing path (1) is designed as two 1Ω / 1W resistors connected in parallel and connected in series with an MGA-S-125V-2.1A fuse, and the fusing path (2) is an MGA-S-125V-2.1A fuse. The connection points of the two 1Ω / 1W resistors and the MGA-S-125V-2.1A fuse of the fusing path (1) lead out the protection circuit monitoring point. The protection circuit monitoring point is used to monitor the state of the short-circuit protection circuit. The magnetic latching relay 2JB2-1-5B on-off control module can independently control the power-on and power-off of the two heating wires according to the control system.

[0064] As shown in Figure 4 , the control subsystem comprises a heating wire power-on and power-off control module, a state monitoring module, an instruction receiving and analyzing module and a data packaging and sending module.

[0065] The instruction receiving and analyzing module can receive the remote control power-on and power-off instructions and the satellite attitude information from the payload management unit, and transmit the compacting device power-on and power-off signals to the heating wire power-on and power-off control module and transmit the attitude information to the data packaging and sending module.

[0066] The heating wire power-on and power-off control module independently controls the corresponding relay to close to power on the target heating wire according to the received power-on instruction. In order to ensure that the heating wire is powered off in time after the protection system is turned on, the heating wire power-on and power-off control module designs three different power-off strategies:

[0067] Strategy (1): after receiving the power-off instruction, control the relay to open;

[0068] Strategy (2): no power-off instruction is received, and the power-on duration has reached the power-on duration stored in the control parameter storage area, control the relay to open;

[0069] Strategy (3): no power-off instruction is received, the heating wire power-on time does not reach the power-on duration in the storage area, but has reached the maximum duration of 120s allowed by the program internally, then control the relay to open;

[0070] The specific process is shown in Figure 5 This design can effectively ensure that the heating wire is powered off smoothly after the protection system is turned on, avoiding the problem of equipment damage caused by long heating time.

[0071] The telemetry state acquisition module in the state monitoring module controls the AD converter to periodically acquire the voltages of the protection circuit monitoring state, the protection system temperature monitoring point voltage, and the protection system deployment state monitoring point voltage, and packs and caches them to the data cache area. Among them, the temperature monitoring point is: a thermistor MF5802 is used, which is pulled up to 5V in series with a 4.7kΩ resistor, and a monitoring point is led out from the middle of the thermistor and the 4.7kΩ resistor. The deployment state monitoring point is: a micro switch is used, which is pulled up to 5V in series with a 4.7kΩ resistor, and a monitoring point is led out from the middle of the micro switch and the 4.7kΩ resistor.

[0072] The data packaging and sending module sends the acquired data to the payload management unit through the RS422 interface at a cycle of 1s / packet, and then transmits it to the ground control system.

[0073] It should be noted that in the above embodiment of the system, each module included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be realized. In addition, the specific names of each functional module are only for easy differentiation, and do not limit the protection scope of the present application.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A microchannel plate nitrogen blowing protection device, characterized in that, The application relates to a micro-channel plate, an integrated protective cover and a nitrogen blowing port, and a pressing device, an unfolding device, a power supply system and a control subsystem. The micro-channel plate is a core component in a sensor of a space environment detection plasma detector and is used for amplifying input charges and outputting to a rear-end scientific data acquisition electronics, so that charged particles in a space environment are finally measured and analyzed; the micro-channel plate is composed of a large number of micro-holes, and the inner surface of the micro-holes is coated with a coating with a high secondary electron emission coefficient; The protective cover is arranged on the sensor head and has a shape consistent with that of the sensor head and a size larger than that of the sensor head; The nitrogen blowing port is used for continuously blowing nitrogen into the sensor in a ground test stage, effectively reducing the content of contaminated gas around the micro-channel plate, so that the purpose of preventing contamination of the micro-channel plate is achieved; the nitrogen blowing port is used for being blocked by a blocking cap before satellite launching to prevent dust pollution in the initial period of orbiting; the nitrogen blowing port is a hollow cylinder, and the outer side of the cylinder is in a threaded form; The pressing device is used for pressing the protective cover and the sensor head when the system is in a protection state and is also used for releasing the protective cover in a hot cutting mode according to an instruction of the control subsystem; The unfolding device is used for unfolding the protective cover in cooperation with the pressing device and is locked after the protective cover is released to a specified position; The power supply system is used for supplying power to the pressing device according to an instruction of the control subsystem; The control subsystem is used for periodically collecting state monitoring parameters and transmitting the state monitoring parameters to a load management unit and is also used for controlling on-off power supply of the pressing device according to a ground remote control instruction received by the load management unit and executing unfolding operation of the system; The control subsystem comprises a heating wire power-on and power-off control module and a state monitoring module; wherein The heating wire power-on and power-off control module is used for generating a power-on signal according to a power-on instruction and generating a power-off signal according to a power-off instruction or an internal timing power-off mark; The state monitoring module is used for collecting voltages of a protection circuit monitoring point, a pressing device temperature monitoring point and an unfolding device monitoring point and buffering the voltages to a data buffer area; The processing process of the heating wire power-on and power-off control module comprises the following steps: When a power-on instruction A is received, a first heating wire power-on signal is generated; When a power-on instruction B is received, a second heating wire power-on signal is generated; When a power-on instruction C is received, a signal for simultaneously powering on two groups of heating wires is generated; When a power-off instruction is received, a signal for simultaneously powering off two groups of heating wires is generated; When no power-off instruction is received and a power-on duration has reached a power-on duration stored in a control parameter storage area, a signal for simultaneously powering off two groups of heating wires is generated; When no power-off instruction is received, a heating wire power-on time does not reach the power-on duration stored in the storage area, but has reached a maximum time length set internally, a signal for simultaneously powering off two groups of heating wires is generated; The state monitoring module controls an AD converter to periodically collect voltages of monitoring points; the monitoring points comprise a protection circuit state monitoring point, a protective system temperature monitoring point and a protective system unfolding state monitoring point; wherein The protection circuit state monitoring point is a protection circuit monitoring point branched from a first branch of a fuse path of the power supply system; ​ The protection system temperature monitoring point is a monitoring point drawn from the middle of a thermistor and a 4.7kΩ resistor connected in series, wherein the thermistor is MF5802, and the 4.7kΩ resistor is connected in series to be pulled up to 5V; The protection system deployment state monitoring point is a monitoring point drawn from the middle of a microswitch and a 4.7kΩ resistor connected in series, wherein the microswitch and the 4.7kΩ resistor are connected in series to be pulled up to 5V; The control subsystem further comprises an instruction receiving and analyzing module and a data packaging and sending module, wherein, The instruction receiving and analyzing module is configured to receive a ground remote control instruction, the ground remote control instruction comprising a power-on instruction, a power-off instruction and satellite attitude information, and send the power-on instruction and the power-off instruction to the heating wire power-on and power-off control module and send the satellite attitude information to the data packaging and sending module; The data packaging and sending module is configured to obtain the state monitoring parameters collected by the sensor from the cache area, package the state monitoring parameters and the satellite attitude information, and send them to the payload management unit through RS422 at a set period and then to the ground.

2. The microchannel plate nitrogen-purged protection apparatus according to claim 1, wherein, The compression device comprises a fiber rope, an accessory and a power heating cutting device; The fiber rope and the accessory are configured to cooperate to generate a compression force to resist a deployment torque generated by the deployment device, compress the protective cover and the sensor head, and generate a compression force to resist a deployment torque generated by the deployment device. The power heating cutting device is configured to melt the fiber rope by heating when the system performs a deployment operation, remove the resisting torque generated by the compression device, and release the protective cover. The power heating cutting device is provided with two groups of independent heating wires to realize three heat cutting modes including separately powering each group of heating wires and simultaneously powering the two groups of heating wires.

3. The microchannel plate nitrogen-purged protection apparatus of claim 1, wherein, The power supply subsystem comprises a short circuit protection circuit and a magnetic latching relay on-off control module, wherein, The short circuit protection circuit adopts two groups of non-balance parallel fuse paths with consistent structures, each group of fuse paths comprising two parallel branches, the first branch being two 1Ω / 1W resistors connected in parallel and then connected in series with an MGA-S-125V-2.1A fuse, and the second branch being an MGA-S-125V-2.1A fuse; a protection circuit monitoring point is drawn from the connection point of the two resistors and the fuse in the first branch; The magnetic latching relay on-off control module comprises two 2JB2-1-5B magnetic latching relays connected in series with each group of fuse paths respectively and corresponding to one group of heating wires in the power heating cutting device, and is configured to independently control the power-on and power-off of the heating wires in the power heating cutting device according to the power-on and power-off signals of the control subsystem.

4. The microchannel plate nitrogen-purged protection apparatus of claim 1, wherein, The deployment device comprises a spring hinge, a limiting device and a dust cover, wherein, The spring hinge is configured to generate a driving torque to pop open the protective cover and lock it after the protective cover is deployed to a specified position; The limiting device is configured to ensure that the protective cover is locked after being deployed to a position, and the locking hook is locked to avoid the protective cover from rebounding after being deployed; The dust cover is configured to prevent space dust and pollutants from entering the spring hinge and causing the spring hinge to be stuck, thereby affecting the deployment of the protection system.

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