Active triggering type cultural relic protection device and method based on pre-earthquake prediction

Abstract

The invention discloses an active triggering type cultural relic protection device and method based on pre-earthquake prediction, and belongs to the technical field of cultural relic protection. The device comprises a showcase body, and a carrying platform is arranged in an inner cavity of the showcase body; the carrying platform rapid evacuation device controls the carrying platform to execute an opening action according to a control instruction of the main control unit; the safe bearing unit is arranged in the protection area and used for bearing the falling cultural relics; the earthquake early warning receiving module receives and analyzes the earthquake motion parameters; the main control unit receives the seismic oscillation parameters, judges the damage level according to the seismic oscillation parameters and generates a control instruction; the state monitoring unit monitors the vibration state of the showcase body, the overturning angle of the carrying platform and the internal pressure of the inner-layer air bag assembly in real time. By integrating the earthquake early warning system, the rapid evacuation mechanism and the multi-stage composite buffering safety bearing unit, a full-chain protection strategy of pre-earthquake prediction, active triggering, lossless transfer and multi-stage energy absorption is achieved, and the survival rate and safety of cultural relics in a strong earthquake environment are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of cultural relic protection technology, and in particular relates to a cultural relic protection device and method based on pre-earthquake prediction and active triggering. Background Technology

[0002] Movable cultural relics, such as ceramics, jade, calligraphy and paintings, bronzes, and lacquerware, serve as crucial material carriers of human civilization. They possess not only immense historical and artistic value but are also extremely fragile due to their material properties. These relics are often composed of brittle materials (such as ceramics and glass) or easily damaged materials (such as paper, textiles, and wood), making them highly susceptible to breakage, fragmentation, surface peeling, or structural failure under sudden and intense vibrations, such as earthquakes. This is especially true for relics already in poor condition, exhibiting micro-cracks or signs of aging; even slight vibrations can cause irreversible damage. These losses not only highlight the inherent physical fragility of the relics but also reflect significant deficiencies in the design concepts and earthquake-resistant protection functions of traditional display cases.

[0003] Currently, widely used earthquake-resistant technologies for artifact display cases can be broadly categorized into two types: passive buffering and mechanical fixing. Passive buffering relies on laying cushioning materials such as rubber, sponge, or polymer foam at the bottom of the display case or inside the artifact's support platform. These materials absorb and disperse vibrational energy through their elastic deformation. However, this method is only effective attenuating low- to mid-frequency vibrations with small amplitudes. Faced with the high-frequency, high-energy impact of strong earthquakes, its buffering capacity quickly saturates, significantly reducing its protective effect. Furthermore, this technology lacks the ability to sense and respond to external stimuli, relying entirely on passive mechanical energy dissipation and failing to achieve adaptive adjustment. On the other hand, mechanical fixing technology uses clamps, straps, ropes, or magnetic adsorption devices to forcibly fix the artifact to the display platform, restricting its displacement. However, this method has obvious drawbacks: mechanical pressure is easily concentrated on local parts of the cultural relic (especially the painted layer, glaze, inlaid ornaments or fragile structures), causing pressure damage, scratches or even breakage; at the same time, it is often difficult to strike a balance between "earthquake safety" and "operational convenience" - too strong a fixation makes it extremely inconvenient to retrieve and display the cultural relic in daily life, while too weak a fixation cannot withstand the strong inertial force during an earthquake, resulting in protection failure.

[0004] Besides the aforementioned technical limitations, existing display case protection systems generally lack intelligent linkage mechanisms with earthquake early warning systems. my country has established the world's largest earthquake early warning network, covering the entire country, capable of sending warning information to key areas within the first few seconds to tens of seconds after an earthquake, utilizing the principle that radio waves travel faster than seismic waves. However, this early warning signal has not yet been effectively integrated into the protection and control system of artifact display cases, resulting in the waste of the precious window of several to tens of seconds available before an earthquake, preventing the display cases from entering a protective state in advance. Furthermore, existing cushioning materials and structural designs are also insufficient to cope with the massive impact overload and high-frequency vibration components of extreme earthquake events, lacking a composite cushioning technology system capable of staged and frequency-specific energy dissipation.

[0005] In summary, existing earthquake-resistant technologies for artifact display cases have several shortcomings, including delayed activation of the protective mechanism, poor adaptability to strong earthquakes, limited efficiency of passive energy dissipation methods, potential secondary damage from mechanical fixation, and failure to effectively integrate earthquake early warning information. Therefore, developing a novel movable earthquake-resistant protection device and supporting methods for artifacts, featuring pre-earthquake prediction capabilities, active triggering and intelligent control, and composite buffering functions, is of paramount and urgent practical significance for enhancing the disaster resistance of museum collections and reducing the loss of cultural heritage during earthquakes. Summary of the Invention

[0006] This invention addresses the shortcomings of existing artifact display cases in earthquake protection, such as delayed response, poor adaptability to strong earthquakes, vulnerability of artifacts to fixed structures, and ineffective utilization of earthquake early warning information. It provides an intelligent earthquake-resistant protection device and method for movable cultural relics based on pre-earthquake prediction and active triggering mechanisms. By integrating an earthquake early warning system, a rapid evacuation mechanism, and multi-level composite buffer safety bearing units, it achieves a full-chain artifact protection strategy of "pre-earthquake prediction—active triggering—non-destructive transfer—multi-level energy absorption," significantly improving the survival rate and safety of precious movable cultural relics in strong earthquake environments.

[0007] To achieve the above-mentioned objectives, the first objective of this invention is to provide a pre-earthquake prediction-based active triggering cultural relic protection device, comprising: The display case body has a display platform inside its cavity. The area above the display platform is the display area, and the area below the display platform is the protection area. The rapid evacuation device for the cargo platform controls the cargo platform to perform an opening action according to the control instructions of the main control unit; The safety support unit, located within the protected area, is designed to support falling cultural relics. The earthquake early warning receiving module receives and analyzes seismic motion parameters. The main control unit receives the seismic motion parameters and determines the damage level based on the seismic motion parameters to generate control commands; The status monitoring unit monitors the vibration status of the display case body, the tilting angle of the loading platform, and the internal pressure of the inner airbag assembly in real time.

[0008] Preferably, the loading platform is composed of two equal-sized flaps, a first flap and a second flap, joined together. The outer edge of each flap is hinged to the inner wall of the display case body; the mating surfaces of the first flap and the second flap are connected by an electromagnetic lock.

[0009] Preferably, the electromagnetic latch includes a lock body located on the first flip plate and a lock tongue located on the second flip plate.

[0010] Preferably, ball joint supports are installed on the left and right inner walls of the protected area, and support rods are symmetrically arranged on the left and right sides. The left support rod is the No. 1 support rod, and the right support rod is the No. 2 support rod. The lower end of the No. 1 support rod is connected to the ball joint support on the left inner wall, and the lower end of the No. 2 support rod is connected to the ball joint support on the right inner wall. The upper end of the No. 1 support rod is hinged to the bottom of the No. 1 flap via a pin, and the upper end of the No. 2 support rod is hinged to the bottom of the No. 2 flap via a pin.

[0011] Preferably, the safety bearing unit includes: an outer impact-resistant shell, a middle energy-absorbing buffer layer, and an inner airbag assembly arranged sequentially from the outside to the inside.

[0012] Preferably, the outer impact-resistant shell is composed of alternating laminations of 7075 aluminum alloy plate and aramid fiber cloth; the middle energy-absorbing buffer layer has a total thickness of 90mm, and consists of open-cell aluminum foam, polyimide foam and nano aerogel felt from the outside to the inside; the inner airbag assembly includes multiple airbags, each airbag is connected to an air pump through an independent pipeline, and the air pump response delay is ≤10ms.

[0013] Preferably, the earthquake early warning receiving module includes a storage unit, a dual-mode communication unit, a positioning unit, and a data parsing unit.

[0014] Preferably, the main control unit has a built-in damage level assessment model, calculates the seismic safety limit of cultural relics based on the ground motion data parsed by the earthquake early warning receiving module, and generates corresponding control commands based on the calculation results; Preferably, the status monitoring unit includes an acceleration sensor, a displacement sensor, and a pressure sensor.

[0015] The second objective of this invention is to provide a proactive cultural relic protection method based on pre-earthquake prediction, comprising: S1. The earthquake early warning receiving module receives earthquake motion data sent by the earthquake bureau's early warning network in real time. After the data parsing unit processes the earthquake motion data, the parsing result is transmitted to the main control unit. S2. The main control unit calls the built-in damage level assessment model, and loads the pre-stored cultural relic quality parameters and cultural relic material parameters. It inputs the expected peak acceleration, cultural relic quality parameters and cultural relic material parameters into the damage level assessment model, calculates the seismic safety limit of the cultural relic, and determines the current damage level based on the calculation results. S3. If the damage level is determined to be level three, the main control unit immediately sends a control command to the actuator and triggers the emergency power supply unit to start, so that the emergency power supply unit can supply power to the core components of the system. S4. After receiving the protection command, the rapid evacuation device of the carrying platform in the actuator controls the electromagnetic lock to unlock, so that the carrying platform tilts and flips, and the cultural relics fall into the hollow cavity of the safety bearing unit under the action of gravity. S5. After receiving the protection command, the inner airbag assembly inflation device in the actuator inflates the inner airbag assembly to the rated pressure. The airbag and the middle energy-absorbing buffer layer work together to form a multi-level buffer structure to absorb the impact energy. S6. The status monitoring unit continuously collects vibration data of the display case body and pressure data of the inner airbag assembly, and feeds back the collected data to the main control unit in real time. When the vibration amplitude drops to the safety threshold, the status monitoring unit generates a protection completion signal and transmits the protection completion signal to the main control unit to complete this seismic protection process.

[0016] The advantages and positive effects of this application are: This invention is the first to deeply integrate earthquake early warning information with the active protection mechanism of cultural relic display cases. By utilizing the time window between P-waves and S-waves, the transfer of cultural relics is completed before the arrival of the main shock, realizing a paradigm shift from "passive response" to "active prevention". Specifically, after receiving the P-wave signal, the main control unit completes the damage level determination within 1 second after the earthquake early warning receiving module receives the signal, and completes the transfer of cultural relics at least 0.5 seconds before the arrival of the S-wave, ensuring that the cultural relics are in a safe bearing unit before the impact of the main shock. This invention employs a three-tiered composite buffer system consisting of a rigid shell, gradient energy absorption, and intelligent airbags. This system can attenuate the impact acceleration of strong earthquakes by more than 80%, which is significantly better than traditional single buffer materials. The outer impact-resistant shell bears the initial impact load, the middle energy-absorbing buffer layer absorbs medium- and high-frequency vibration energy through the stepwise compression of different materials, and the inner airbag assembly forms a flexible wrapping through rapid inflation to suppress residual vibration. The synergistic effect of these three components reduces the acceleration experienced by the cultural relic to below a safe threshold. In this invention, the rapid removal device of the carrying platform does not require clamping or binding of cultural relics. It relies on gravity free fall to complete the transfer, avoiding secondary damage to fragile cultural relics (such as ceramics and paper) caused by mechanical stress. The speed of the flipping process is controlled by damping hinges to ensure that the cultural relics fall smoothly into the safe carrying unit. Moreover, the transfer path is vertical, reducing the risk of lateral friction and collision. This invention has a graded response capability, which can dynamically decide whether to activate the full protection process based on the magnitude and characteristics of the cultural relics, taking into account both safety and ease of use; for minor earthquakes or distant earthquakes, only pre-inflation or local buffering is activated to avoid frequent triggering of the full protection process and affecting daily exhibitions. This invention features a well-sealed overall structure, and the outer shell has fireproof, waterproof, and explosion-proof functions, which can effectively resist secondary disasters caused by earthquakes.

[0017] In summary, this invention provides an intelligent, highly reliable, and non-destructive pre-earthquake predictive protection solution for movable cultural relics, suitable for important cultural heritage preservation sites such as museums, art galleries, and archives. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is an overall structural block diagram of a preferred embodiment of the present invention; Figure 2 This is a flowchart of a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the display case body partitions in a preferred embodiment of the present invention; Figure 4 This is a front view of the protected area and safety bearing unit in a preferred embodiment of the present invention; Figure 5 This is a top view of the loading platform in a preferred embodiment of the present invention; Figure 6 This is a structural diagram of the ball joint support in a preferred embodiment of the present invention; Figure 7 This is a structural diagram of the electromagnetic latch in a preferred embodiment of the present invention; Figure 8 This is a structural diagram of the inner airbag assembly in a preferred embodiment of the present invention.

[0019] The attached figures are labeled as follows: 1. Display case body; 11. Display area; 12. Protection area; 2. Carrying platform; 21. No. 1 flip panel; 22. No. 2 flip panel; 3. Flexible buffer pad; 4. Safety bearing unit; 41. Outer impact-resistant shell; 42. Middle energy-absorbing buffer layer; 5. Inner airbag assembly; 51. Airbag; 52. Air pump; 53. Control components; 6. Carrying platform quick evacuation device; 61. Ball joint support; 611. Ball head; 612. Ball joint shell; 613. Base; 614. Bolt hole; 62. Support rod; 621. No. 1 support rod; 622. No. 2 support rod; 63. Electromagnetic lock; 631. Lock body; 632. Lock tongue; 633. Lock tongue seat; 634. Electromagnetic push rod; 635. Electromagnetic coil; 636. Iron core. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 8 The first embodiment is a pre-earthquake prediction-based active triggering cultural relic protection device, comprising: The display case body 1 has a carrying platform 2 in its inner cavity. The upper part of the carrying platform 2 is the display area 11, and the lower part of the carrying platform 2 is the protection area 12. The rapid evacuation device 6 for the cargo platform controls the cargo platform 2 to perform an opening action according to the control instructions of the main control unit; Safety support unit 4 is located within the protected area 12 to support falling cultural relics; The earthquake early warning receiving module receives and analyzes seismic motion parameters. The main control unit receives the seismic motion parameters and determines the damage level based on the seismic motion parameters to generate control commands; The status monitoring unit monitors the vibration status of the display case body 1, the flipping angle of the loading platform 2, and the internal pressure of the inner airbag assembly 5 in real time.

[0022] In this invention, the primary function of the carrying platform 2 is to support the cultural relics displayed above. Its design employs a robust structure and high-strength materials to ensure the safety and stability of the relics during daily display. The secondary function of the carrying platform 2 is that in emergency situations (such as earthquakes), it can automatically open its unlocking mechanism, allowing the displayed cultural relics to fall smoothly into the protected area 12, effectively preventing damage and achieving rapid protection. The protected area 12, located below the carrying platform, is equipped with cushioning materials to further reduce impact and ensure the integrity of the cultural relics during the fall.

[0023] In one specific embodiment: the loading platform 2 is composed of two equal-sized flaps, No. 1 flap 21 and No. 2 flap 22, joined together to form a complete display plane, facilitating the carrying and display of items. The outer edge of each flap is connected to the inner wall of the display case body 1 via hinges, allowing the flaps to rotate and open around the hinge point, thus facilitating the display of artifacts falling into the protected area 12. The mating surfaces of flaps 21 and 22 are connected by an electromagnetic latch 63. When energized, the latch generates magnetic force to firmly lock the flaps together, ensuring the stability and safety of the loading platform 2; when de-energized, the latch releases, allowing the flaps to easily separate, enabling quick opening and closing operations.

[0024] The electromagnetic latch 63 includes a lock body 631 located on the first flap 211 and a latch 632 located on the second flap 212.

[0025] The left and right inner walls of the protected area 12 are respectively equipped with ball joint supports 61, and support rods 62 are symmetrically arranged on the left and right sides. The left support rod 62 is the first support rod 621, and the right support rod 62 is the second support rod 622. The lower end of the first support rod 621 is connected to the ball joint support 61 on the left inner wall, and the lower end of the second support rod 622 is connected to the ball joint support 61 on the right inner wall. The upper end of the first support rod 621 is hinged to the bottom of the first flap 21 through a pin, and the upper end of the second support rod 622 is hinged to the bottom of the second flap 22 through a pin.

[0026] The safety bearing unit 4 includes: an outer impact-resistant shell 41, a middle energy-absorbing buffer layer 42, and an inner airbag assembly 5 arranged sequentially from the outside to the inside.

[0027] The outer impact-resistant shell 41 is composed of alternating laminations of 7075 aluminum alloy plate and aramid fiber cloth; the middle energy-absorbing buffer layer 42 has a total thickness of 90mm, and consists of open-cell aluminum foam, polyimide foam and nano aerogel felt from the outside to the inside; the inner airbag assembly 5 includes multiple airbags 51, each airbag 51 is connected to an air pump 52 through an independent pipeline, and the air pump 52 has a response delay of ≤10ms.

[0028] The earthquake early warning receiving module includes a storage unit, a dual-mode communication unit, a positioning unit, and a data parsing unit.

[0029] The main control unit has a built-in damage level assessment model, calculates the seismic safety limit of cultural relics based on the ground motion data parsed by the earthquake early warning receiving module, and generates corresponding control commands based on the calculation results. The condition monitoring unit includes an acceleration sensor, a displacement sensor, and a pressure sensor.

[0030] This embodiment mainly includes: a display case body 1, a carrying platform 2, a flexible buffer pad 3, a safety bearing unit 4, an inner airbag assembly 5, and a rapid evacuation device for the carrying platform 6. The display case body 1 adopts a double-layer structure design of "exhibition above and protection below". The upper layer is the display area 11, which is enclosed by high-strength light-transmitting glass for daily display and viewing of cultural relics, taking into account both aesthetic and visibility requirements. The lower layer is the protection area 12, which adopts a sealed earthquake-resistant structure. The safety bearing unit 4 is set inside, and a flexible buffer pad 3 is laid. It is used to receive cultural relics that fall automatically from the carrying platform 2 before the arrival of seismic waves by being transferred through the rapid evacuation device 6. It relies on a multi-level buffer mechanism to absorb impact energy and protect cultural relics without damage. The carrying platform 2 is located between the display area 11 and the protection area 12. It is both a physical boundary layer and a core functional component. Normally, it serves as a static bearing foundation for cultural relics. In the event of a disaster, it can be quickly moved or sunk by the rapid evacuation device 6, effectively preventing cultural relics from being bumped or overturned during the transfer. The platform's structural design, drive mechanism, and action timing control are key technologies for enabling the seamless transfer of cultural relics from a display state to a safe protection state. The inner airbag assembly 5 further forms an air cushion buffer layer within the safety load-bearing unit 4, working synergistically with the flexible buffer pad 3 to significantly enhance the overall seismic buffering performance of the system.

[0031] The exhibition area is composed of ultra-white bulletproof glass and a 6061-T6 aluminum alloy frame, with the glass surface coated with an anti-ultraviolet film. The electromagnetic lock consists of two parts: a "lock body" and a "lock tongue," which are respectively installed on the inner mating edges of flap 1 and flap 2. The lock body of the electromagnetic lock is fixed on the mating edge of flap 1, and the lock tongue of the electromagnetic lock is fixed on the mating edge of flap 2. When powered on, the lock tongue engages with the lock body, locking the two flaps together to form a complete horizontal loading platform. When powered off, the lock tongue pops out, and the two flaps lose their locking constraint.

[0032] The upper end of the support rod is hinged to the bottom of the flip panel via a pin, while the lower end is connected to the inner wall of the display case via a ball joint. The ball joint allows the support rod to rotate freely around the joint. When the electromagnetic lock engages the flip panel, the support rod is in an "upwardly supported" state, providing additional load-bearing support for the platform. The operation of the rapid removal device for the platform is as follows: the electromagnetic lock is energized and engaged, locking the two flip panels into a horizontal platform. A flexible buffer pad is placed on top, ensuring the artifact is stably positioned. Simultaneously, the support rod is supported diagonally at the bottom of the flip panel via the ball joint, working with the electromagnetic lock to maintain the horizontal stability of the platform. Upon receiving a warning signal, the electromagnetic lock is de-energized and unlocked, instantly disengaging the latch. The two flip panels of the platform lose their locking constraint, and the support rod loses its upward support, rotating freely around the ball joint towards both sides of the display case (without obstructing the opening of the flip panels). Under the combined weight of its own body and the artifact, the flap folds downwards at a uniform speed around the outer damping hinge (like a door opening). Once fully open, the artifact falls freely and vertically into the safety support unit directly below. The safety support unit's buffer structure attenuates the impact, thus protecting the artifact. The safety support unit is the core protective component, containing a hollow cavity to house the artifact, and an outer layer employing a three-tiered composite structure. This three-tiered composite structure consists of an outer impact-resistant shell, a middle energy-absorbing buffer layer, and an inner air bladder assembly. The earthquake early warning receiving module includes a storage unit (caching early warning data and system logs for the past 30 days), a dual-mode communication unit (enabling dual-path reception of early warning information), a positioning unit (for calculating the straight-line distance between the display case and the epicenter), and a data analysis unit (for analyzing key parameters such as magnitude, epicentral distance, P-wave arrival time, and expected peak ground acceleration). The main control unit is connected to the earthquake early warning receiving module and the rapid evacuation device of the transport platform. The main control unit has a built-in damage level assessment model, calculates the seismic safety limit of the cultural relic based on the ground motion data analyzed by the earthquake early warning receiving module, and generates corresponding control commands based on the calculation results. The status monitoring unit includes an acceleration sensor, a displacement sensor, and a pressure sensor, used to collect vibration status data of the display case body and working status data of the safety bearing unit in real time. The emergency power supply unit is composed of a lithium-sulfur battery pack and a supercapacitor. After the external power supply is interrupted, the emergency power supply unit can maintain the continuous operation of the core functions of the system to ensure the normal execution of the protection mechanism during an earthquake.

[0033] like Figure 3 and Figure 5As shown, the loading platform 2 consists of two rectangular flaps of equal area, designated as flap 1 (21) and flap 22 (22). The outer edge of each flap is hinged to the inner wall of the display case body 1 via damping hinges. This hinged design allows the flap to smoothly rotate downwards around its outer edge. The damping hinges effectively buffer the impact force during rotation, preventing sudden opening and closing. The inner mating edges of flaps 21 and 22 are equipped with precisely matched locking interfaces and electromagnetic latches (63) to ensure accuracy and reliability during docking. Figure 7 As shown, the electromagnetic latch 63 includes a lock body 631, a latch 632, a latch seat 633, an electromagnetic push rod 634, an electromagnetic coil 635, and an iron core 636. The lock body 631 is bolted to the inner edge of the first flap 21, and the latch 632 is securely mounted to the inner edge of the second flap 22 via the latch seat 633. The latch seat 633 is designed to be adjustable for fine-tuning the locking position. When energized, the electromagnetic coil 635 generates a strong magnetic force, driving the iron core 636 to move linearly, thereby pushing the electromagnetic push rod 634 forward. This causes the locking tongue 632 to precisely engage in the lock groove of the lock body 631, tightly locking the first flip plate 21 and the second flip plate 22 into a complete horizontal loading platform 2, ensuring the stability of the loading platform 2 under load. When the power is off, the electromagnetic force disappears rapidly, and the locking tongue 632 ejects quickly within 50ms under the restoring force of the built-in spring, promptly releasing the locking constraint and facilitating the flipping operation of the loading platform 2. The upper surface of the loading platform 2 is covered with a flexible buffer pad 3, which is made of highly elastic silicone or wear-resistant polyurethane material, with a thickness of 5mm and a surface textured for anti-slip treatment. This effectively stabilizes the artifacts in a static display state, absorbs vibrations, prevents slippage and scratches, and improves display safety.

[0034] like Figure 1 and Figure 6 As shown, the rapid evacuation device 6 for the cargo platform also includes a pair of support rods 62 symmetrically arranged by a first support rod 621 and a second support rod 622, and corresponding ball joint supports 61. This symmetrical structure significantly enhances the stability and balance of the cargo platform 2 under load. The upper end of the support rod 62 is hinged to a position slightly outside the center of the bottom surface of the flap via a pin, while the lower end is connected to the ball joint support 61, forming a reliable rotational support connection. Figure 6As shown, the ball joint support 61 consists of a ball head 611, a ball joint housing 612, a base 613, and bolt holes 614. The ball head 611 is embedded inside the ball joint housing 612, forming a multi-directional rotatable joint structure, allowing the support rod 62 to rotate freely in any plane and adapt to the angle changes of the flip panel 21 under different movement states. When the electromagnetic lock 63 is locked, the support rod 62 maintains an upwardly inclined support posture, providing additional load-bearing capacity and rigid support for the flip panel. Once the electromagnetic lock 63 is released, the support rod 62 loses its upward support force and naturally retracts to both sides of the display case body 1 around the ball joint support 61 during the flip panel's downward movement, thus completely avoiding interference with the flip panel's flipping action. In addition, the bottom surface of the flip panel is also provided with a guide flange of a specific shape (not labeled in the figure). This flange precisely matches the edge of the top opening of the safety bearing unit 4, which can guide and limit the artifact when it falls, ensuring that the artifact falls accurately and vertically into the central area of ​​the hollow cavity, effectively preventing the risk of side wall collision caused by deviation.

[0035] like Figure 4 and Figure 8 As shown, the safety bearing unit 4 is located inside the protected area 12. Its core is a hollow cavity for containing cultural relics, and the outer layer adopts a three-level composite structure: the outermost layer is an outer impact-resistant shell 41, the middle layer is a middle energy-absorbing buffer layer 42, and the innermost layer is an inner airbag assembly 5. The outer impact-resistant shell 41 is formed by alternating lamination of 7075-T6 aviation aluminum alloy plate and aramid fiber cloth, and then hot-pressed and cured at 200℃ and 10MPa. It has a thickness of 10mm and has high impact resistance and UL94 V-0 flame retardant rating. It can maintain structural integrity for ≥30 minutes in an 800℃ flame. The middle energy-absorbing buffer layer 42 has a total thickness of 90mm and adopts a gradient energy absorption design. From the outside to the inside, it consists of 30mm open-cell aluminum foam (porosity 70%), 30mm polyimide foam (density 0.25g / cm³), and 30mm nano aerogel felt (thermal conductivity ≤0.02W / m·K), which gradually attenuates the vibration energy of different frequencies. The inner air bladder assembly 5 includes four independent air bladders 51, distributed around the perimeter of the cavity, and made of Kevlar fiber fabric. Each air bladder 51 is connected to an air pump 52 via an independent pipeline. The air pump 52 has a response delay of ≤10ms, and the response time from triggering the inflation command to full expansion is ≤0.5 seconds. The inner wall of the hollow cavity is also equipped with flexible limiting baffles (not labeled in the figure) arranged in a cross shape, made of silicone material, to limit the lateral displacement of the artifact while avoiding rigid contact.

[0036] The outer impact-resistant shell is made of composite material, which has high impact resistance and high temperature resistance.

[0037] The middle energy-absorbing buffer layer is formed by a multi-level energy-absorbing material composite and adopts a gradient energy absorption design.

[0038] The inner airbag assembly includes an independent airbag, which is made of Kevlar fiber fabric, and the response time of the airbag from triggering the inflation command to full inflation is ≤0.5 seconds.

[0039] The unlocking response time of the electromagnetic lock in the rapid evacuation device of the loading platform is ≤50ms. The rapid evacuation device of the loading platform drives the loading platform to achieve a flipping action and ensures that the cultural relics on the loading platform quickly fall into the hollow cavity of the safety bearing unit.

[0040] like Figure 1 As shown, the earthquake early warning receiving module is integrated into the control box at the top of the display case 1, including a storage unit, a dual-mode communication unit, a positioning unit, and a data parsing unit. The dual-mode communication unit includes a BeiDou short message module and a 4G / 5G communication module; when either link fails, the other automatically takes over. The positioning unit uses a GNSS multi-mode positioning chip with a positioning accuracy better than 2 meters. The data parsing unit uses an ARM Cortex-M7 architecture processor, capable of parsing and verifying parameters such as magnitude, epicentral distance, P-wave arrival time, and estimated peak ground acceleration within 100ms. The storage unit can cache early warning data and system logs from the past 30 days. The main control unit uses an industrial-grade embedded controller with a built-in damage level assessment model. This model sets different safety limits based on the material of the artifact: 0.3g–0.5g for ceramic artifacts and 0.15g–0.25g for paper or textile artifacts. The main control unit compares the predicted peak acceleration obtained from the analysis with the corresponding safety limit of the cultural relic. If it exceeds 80% of the safety limit, it is determined to be a level two warning, and only the inner airbag component 5 is pre-inflated to 30% capacity. If it exceeds the safety limit, it is determined to be a level three emergency, and all protection processes are activated.

[0041] The status monitoring unit includes a triaxial accelerometer, a laser displacement sensor, and a pressure sensor. The triaxial accelerometer is installed at the four bottom corners and the top center of the display case body 1, with a sampling frequency of 1kHz, for real-time vibration monitoring. The laser displacement sensor is installed on the inner wall of the display case body 1, aligned with the marked points on the bottom surface of the loading platform 2, measuring the tilt angle with an accuracy of ±0.5°. The pressure sensor is embedded in the wall of the inner airbag assembly 5, with a range of 0–0.3MPa and an accuracy of ±1%FS, for monitoring the internal pressure of the airbag. The emergency power supply unit consists of a lithium-sulfur battery pack (nominal voltage 24V, capacity 10Ah) and a supercapacitor pack (rated voltage 24V, energy storage 500F) connected in parallel via a bidirectional DC-DC converter. Normally powered and charged by mains electricity, it switches to emergency mode within 0.1 seconds after a mains power outage, with output voltage fluctuations ≤±2%, maintaining the core functions of the system for ≥45 minutes.

[0042] A proactive cultural relic protection method based on pre-earthquake prediction includes the following steps: S1: The earthquake early warning receiving module receives earthquake motion data from the earthquake bureau's early warning network in real time. After the data parsing unit processes the earthquake motion data, the parsing result is transmitted to the main control unit. S2: The main control unit calls the built-in damage level assessment model, loads the pre-stored cultural relic quality parameters and cultural relic material parameters, inputs the expected peak acceleration, cultural relic quality parameters and cultural relic material parameters into the damage level assessment model, calculates the seismic safety limit of the cultural relic, and determines the current damage level based on the calculation results; S3: If the damage level is determined to be level three (emergency level), the main control unit immediately sends a protection command to the actuator and triggers the emergency power supply unit to start, which then supplies power to the core components of the system. S4: After receiving the protection command, the rapid evacuation device of the carrying platform in the actuator completes the electromagnetic lock unlocking action in a short time, realizing the tilting and flipping of the carrying platform, and the cultural relic falls into the hollow cavity of the safety bearing unit under the action of gravity; S5: After receiving the protection command, the inner air bladder component inflation device in the actuator inflates the inner air bladder component to the rated pressure in a short time. The air bladder and the middle energy-absorbing buffer layer work together to form a multi-level buffer structure to absorb the impact energy. S6: The status monitoring unit continuously collects vibration data of the display case body and pressure data of the inner airbag assembly, and feeds back the collected data to the main control unit in real time; when the vibration amplitude drops to the safety threshold, the status monitoring unit generates a protection completion signal and transmits the protection completion signal to the main control unit to complete this seismic protection process.

[0043] The operation process of this invention is as follows: In stage S1, the earthquake early warning receiving module receives earthquake motion data sent by the earthquake bureau's early warning network in real time. After verification, format conversion, and signal amplification by the data parsing unit, the effective data is transmitted to the main control unit via wired or wireless transmission. In stage S2, the main control unit calls the built-in damage level assessment model, combines the pre-stored cultural relic quality parameters and material parameters (including density, elastic modulus, brittleness coefficient, etc.), dynamically calculates the seismic safety limit of the cultural relic, and determines the current earthquake damage level based on the peak ground acceleration and spectral characteristics. In stage S3, if the level is determined to be Level III emergency, the main control unit immediately sends a protection command to the actuator and simultaneously starts the emergency power supply unit to ensure that the actuator can still work normally in the event of a mains power outage. In stage S4, the rapid evacuation device 6 of the cargo platform receives the command. Following the command, the electromagnetic lock 63 is de-energized and unlocked within ≤50ms. Under the combined weight of its own gravity and the weight of the artifact, the first flap 21 and the second flap 22 rapidly flip downwards around the damping hinge, allowing the artifact to fall vertically into the hollow cavity of the safety bearing unit 4 via the guide structure. In stage S5, the inner airbag assembly 5 simultaneously receives the inflation command and is inflated to the rated pressure (e.g., 0.18MPa) by the air pump within ≤0.5 seconds, forming a multi-level buffer structure with gradient energy dissipation characteristics together with the middle energy-absorbing buffer layer 42. In stage S6, the status monitoring unit continuously collects vibration and pressure data and feeds it back to the main control unit. After the earthquake ends, if the vibration acceleration is below 0.05g for 30 consecutive seconds, the protection is deemed complete. The system automatically generates a protection report containing early warning data, action sequence, and vibration curves, and uploads it to the monitoring platform.

[0044] The detailed workflow is as follows: Step 1: Early Warning and Monitoring Phase (Routine) The earthquake early warning receiving module receives valid information from the earthquake bureau's early warning network in real time, and the main control unit continuously monitors the mains power supply status and self-test signals of each component (such as the status of the electromagnetic lock) to ensure that the system is in standby mode.

[0045] Step 2: Early Warning Analysis Phase (After the Earthquake) Upon receiving an earthquake early warning message, the system immediately enters the analysis state: resolving parameters (extracting magnitude M, epicentral distance D, P-wave arrival time T1, and expected peak ground acceleration); calculating the safety threshold S; and determining the level (judging the peak ground acceleration against the safety threshold).

[0046] Step 3, Pre-action phase (1 second before T1 from T0, where T0 is the moment the warning information is received) T0+1 seconds: The main control unit activates the emergency power supply unit and disconnects the mains power connection; T0+2 seconds: The inner air bladder component inflation device is activated, pre-inflating to 30% capacity to prevent damage to the fallen artifacts; T0+3 seconds: The electromagnetic latch under the cargo platform enters the unlocking preparation state.

[0047] Step 4: Protection Execution Phase (1 second before T1 to T1) T1-1 second: The main control unit issues an execution command, the electromagnetic lock latch is de-energized and unlocked (completed within 50ms), and the bolt instantly disengages from the lock body; T1-0.9 seconds: The two flaps of the loading platform lose their locking constraint, and at the same time the support rod loses its upward support force, and rotates freely around the ball joint support to the sides of the display case body. T1-0.5 seconds: Under the combined effect of its own weight and the weight of the artifact, the flap quickly flips downwards around the outer damping hinge; after the flap opens to a certain angle, the artifact falls freely and vertically into the safety bearing unit directly below. T1-0.3 seconds: The inner air bladder component inflation device is fully activated, encasing the cultural relic; At time T1: The artifact is fully inside the hollow cavity, and the inner air bladder assembly reaches the rated pressure, forming complete protection.

[0048] Step 5: Stabilization and Protection Phase (During Earthquake Duration) The condition monitoring unit monitors vibration data in real time. If an impact exceeding the design value is detected, the main control unit controls the inner airbag assembly's air supply valve to open and dynamically adjust the internal pressure to optimize the buffering effect.

[0049] Step 6: Recovery Phase (After the earthquake) When the vibration acceleration is less than 0.05g for 30 consecutive seconds, the system determines that the earthquake has ended and generates a protection report (including early warning data, action sequence, and vibration curve).

[0050] This invention is applied to display cases of Ming Dynasty blue and white porcelain.

[0051] Artifact parameters: Ming Dynasty Yongle blue and white lotus scroll pattern hand-pressed cup, weight 0.8kg, height 10cm, mouth diameter 9cm, classified as first-class cultural relic, material is brittle ceramic; Display case configuration: Safety load-bearing unit 4, outer impact-resistant shell 41 adopts 7075 aluminum alloy + aramid composite structure, middle energy-absorbing buffer layer 42 with a total thickness of 90mm; Early warning scenario: Receive earthquake early warning information, magnitude M=6.8, epicenter distance 55km, P-wave arrival time 10 seconds, expected peak acceleration 0.35g; System response: Safety threshold calculation: When the expected peak acceleration exceeds the safety threshold, level three protection is triggered; T0+2 seconds: Inner airbag assembly 5 is pre-inflated to 0.05 MPa; T0+8 seconds: The electromagnetic lock 63 under the cargo platform 2 is unlocked, and the flipping posture is completed within 1 second, and the ceramic cup falls into the safety bearing unit 4. T0+9 seconds: The inner airbag assembly 5 is fully inflated to 0.18MPa, and the ceramic cup is wrapped in the center by the airbag 51; After the seismic waves arrived, the maximum acceleration of the main frame of the display case was measured to be 1.2g. After buffering, the acceleration of the cultural relics in the safety bearing unit 4 was reduced to 0.08g, which is far below the ceramic breakage threshold (0.5g). After the earthquake, the cultural relics remained intact, and the system generated and uploaded a protection report.

[0052] This invention is applied to display cases of Qing Dynasty scroll paintings. Artifact parameters: Qing Dynasty Zheng Banqiao's "Ink Bamboo Painting" scroll, weight 1.2kg, length 180cm, width 60cm, paper artifact; Warning scenario: Magnitude M=5.5, epicenter distance 30km, P-wave arrival time 4 seconds, estimated peak acceleration 0.22g; System response: A level-two warning is triggered when the expected peak acceleration is less than the calculated safety threshold. The inner airbag assembly 5 is pre-inflated to 30%, and the electromagnetic latch 63 under the cargo platform 2 remains locked. After the seismic waves arrived, the display case vibrated slightly. Since it did not reach the level three threshold, the cultural relic did not enter the safe bearing unit 4. The vibration was absorbed only by the pre-inflated inner air bladder assembly 5 and the flexible buffer pad 3 on the loading platform 2. Ultimately, the artifact was free of wrinkles and tears, remaining in perfect condition.

[0053] Taking a Ming Dynasty Yongle blue-and-white lotus-patterned hand-pressed cup (weighing 0.8 kg, a first-class ceramic cultural relic) as an example: When receiving an early warning message with a magnitude of M=6.8, an epicenter distance of 55 km, and a P-wave arrival time of 10 seconds, the main control unit calculates the expected peak acceleration as 0.35 g. The main control unit determines that this exceeds the ceramic safety limit of 0.3 g, triggering level three protection. At T0+2 seconds, the inner airbag assembly 5 is pre-inflated to 0.05 MPa; at T0+8 seconds, the electromagnetic lock 63 unlocks, and the carrying platform 2 completes its rotation within 1 second, allowing the porcelain cup to fall vertically into the safety bearing unit 4; at T0+9 seconds, the airbag 51 is fully inflated to 0.18 MPa, encasing the porcelain cup in the center of the airbag. After the seismic wave arrives, the maximum measured acceleration of the display case frame is 1.2 g. After the three-level buffering, the acceleration experienced by the cultural relic drops to 0.08 g, far below the breakage threshold, and the cultural relic remains intact.

[0054] For the Qing Dynasty Zheng Banqiao's "Ink Bamboo Painting" scroll (weighing 1.2 kg, a paper artifact), when a warning of magnitude 5.5, epicentral distance 30 km, and P-wave arrival time 4 seconds was received, the main control unit calculated the estimated peak acceleration to be 0.22 g. Since this was lower than the safety limit of 0.25 g for paper artifacts but exceeded 80% (0.2 g), the system determined it to be a level two warning. Only the inner airbag assembly 5 was pre-inflated to 30%, and the cargo platform 2 remained locked. After the seismic wave arrived, the vibration was absorbed only by the flexible buffer pad 3 and the pre-inflated airbag 51, leaving the artifact intact without wrinkles or tears.

[0055] In summary, this invention integrates earthquake early warning, rapid evacuation mechanisms, and a three-level composite buffer system to achieve full-chain protection of earthquake prediction, active triggering, non-destructive transfer, and efficient energy absorption, significantly improving the safety and survival rate of movable cultural relics in strong earthquakes and secondary disaster environments.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A pre-earthquake prediction-based active triggering type cultural relic protection device, characterized in that, The display cabinet body (1) is provided with a support platform (2) in the inner cavity of the display cabinet body (1), and the upper part of the support platform (2) is a display area (11), and the lower part of the support platform (2) is a protection area (12); The support platform rapid evacuation device (6) controls the support platform (2) to execute the starting operation according to the control instruction of the main control unit; The safety bearing unit (4) is arranged in the protection area (12) and bears the falling cultural relics; The earthquake early warning receiving module receives and analyzes seismic parameters; The main control unit receives the seismic parameters, judges the damage level according to the seismic parameters, and generates control instructions; The state monitoring unit monitors the vibration state of the display cabinet body (1), the overturning angle of the support platform (2) and the internal pressure of the inner air bag assembly (5) in real time. The support platform (2) is composed of two left and right equal-area No. 1 and No. 2 turning plates (21) and (22), and the outer edges of each turning plate are hinged to the inner walls of the display cabinet body (1); the abutting surfaces of the No. 1 and No. 2 turning plates (21) and (22) are connected by an electromagnetic lock (63).

2. The active trigger type cultural relic protection device based on pre-earthquake prediction according to claim 1, characterized in that, The electromagnetic lock (63) includes a lock body (631) on the No. 1 turning plate (21) and a lock tongue (632) on the No. 2 turning plate (22).

3. The active triggered cultural relic protection device based on pre-earthquake prediction according to claim 2, characterized in that, The left and right inner walls of the protection area (12) are respectively provided with spherical hinge supports (61), and support rods (62) are symmetrically arranged on the left and right sides, the left support rod (62) is a No. 1 support rod (621), and the right support rod (62) is a No. 2 support rod (622); the lower end of the No. 1 support rod (621) is connected with the spherical hinge support (61) on the left inner wall, the lower end of the No. 2 support rod (622) is connected with the spherical hinge support (61) on the right inner wall, the upper end of the No. 1 support rod (621) is hinged to the bottom of the No. 1 turning plate (211) through a pin shaft, and the upper end of the No. 2 support rod (622) is hinged to the bottom of the No. 2 turning plate (212) through a pin shaft.

4. The active triggered cultural relic protection device based on pre-earthquake prediction according to claim 3, characterized in that, The safety bearing unit (4) comprises an outer anti-impact shell (41), a middle energy-absorbing buffer layer (42) and an inner air bag assembly (5) arranged in sequence from outside to inside.

5. The active triggered type cultural relic protection device based on pre-earthquake prediction according to claim 1, characterized in that, The outer anti-impact shell (41) is composed of 7075 aluminum alloy plates and aramid fiber cloth which are alternately laminated; the total thickness of the middle energy-absorbing buffer layer (42) is 90mm, and it is composed of open-cell foam aluminum, polyimide foam and nano aerogel felt in sequence from outside to inside; the inner air bag assembly (5) comprises a plurality of air bags (51), each air bag (51) is connected with a gas pump (52) through an independent pipeline, and the response delay of the gas pump (52) is less than or equal to 10ms.

6. The active triggered cultural relic protection device based on pre-earthquake prediction according to claim 5, characterized in that, The earthquake early warning receiving module comprises a storage unit, a dual-mode communication unit, a positioning unit and a data analysis unit.

7. The active triggered cultural relic protection device based on pre-earthquake prediction according to claim 1, characterized in that, The main control unit is provided with a damage level evaluation model, calculates the seismic safety limit value of cultural relics according to the seismic data analyzed by the earthquake early warning receiving module, and generates corresponding control instructions based on the calculation result.

8. The active triggered cultural heritage protection device based on pre-earthquake prediction according to claim 1, characterized in that, The state monitoring unit comprises an acceleration sensor, a displacement sensor and a pressure sensor.

9. The active triggered type cultural relic protection device based on pre-earthquake prediction according to claim 1, characterized in that, The display cabinet body (1) is provided with a support platform (2) in the inner cavity of the display cabinet body (1), and the upper part of the support platform (2) is a display area (11), and the lower part of the support platform (2) is a protection area (12); 10. A method for active triggering protection of cultural relics based on pre-earthquake prediction, characterized in that, ​ S1, the earthquake early warning receiving module receives the ground motion data issued by the earthquake early warning network in real time, analyzes the ground motion data through the data analysis unit, and transmits the analysis result to the main control unit; S2, the main control unit calls the built-in damage level evaluation model, loads the pre-stored cultural relic quality parameters and cultural relic material parameters, inputs the predicted peak acceleration, cultural relic quality parameters and cultural relic material parameters into the damage level evaluation model, calculates the seismic safety limit of cultural relics, and determines the current damage level according to the calculation result; S3, if the damage level is determined to reach level three, the main control unit immediately sends a control instruction to the actuator, and triggers the emergency power supply unit to start, and the emergency power supply unit supplies power to the system core components; S4, after the load platform rapid evacuation device in the actuator receives the protection instruction, the electromagnetic lock is unlocked, the load platform is tilted and turned over, and the cultural relics fall into the hollow cavity of the safety bearing unit under the action of gravity; S5, after the inner air bag assembly inflation device in the actuator synchronously receives the protection instruction, the inner air bag assembly is inflated to the rated pressure, the air bag and the middle energy absorption buffer layer cooperate to form a multi-stage buffer structure, and the impact energy is absorbed together; S6, the state monitoring unit continuously collects the vibration data of the showcase body and the pressure data of the inner air bag assembly, and feeds back the collected data to the main control unit in real time; when the vibration amplitude decreases to the safety threshold, the state monitoring unit generates a protection completion signal and transmits it to the main control unit, completing the anti-seismic protection process.

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