Energy absorption device and using method of energy absorption device

Abstract

The invention discloses an energy absorption device and an energy absorption device using method. The energy absorbing device comprises a plurality of base plates, a plurality of connecting rods and a plurality of connecting rods, wherein the base plates form a long-strip chain plate capable of being unfolded or folded; the first energy absorption half bodies are arranged on one face of each base plate except the base plate located at one end of the long-strip chain plate, and annular bodies are arranged on the first energy absorption half bodies; the second energy absorption half bodies are arranged on one face of each base plate except the base plate located at the other end of the long-strip chain plate, and hook claw structures are arranged on the second energy absorption half bodies. According to the energy absorption device, the hook claw structure with the protruding thorn face and the hair face annular body opposite to the hook claw structure are mutually coupled, the hook claw structure and the annular body which are mutually locked can form relatively stable hooking interaction force, and hooking and disengaging of the hook and the annular body can be repeated for multiple times.

Description

Technical Field

[0001] The present application relates to the field of energy absorption technology, and in particular to an energy absorption device and a method for using the energy absorption device. Background Art

[0002] Fires and other accidents often occur in today's society, and in such accidents, residents of high-rise buildings have no better way than to escape through the escape passages.

[0003] Some high-rise buildings are now equipped with external wall escape tools, but most escape tools require people to escape by walking, and most escape tools are made of metal and plastic. Once escape tools made of metal and plastic encounter fire and other situations, on the one hand, they may burn, and on the other hand, they may become unusable due to excessive temperature.

[0004] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned defects of the prior art. Summary of the invention

[0005] The purpose of the present application is to provide an energy absorbing device to overcome or at least alleviate at least one of the above-mentioned defects of the prior art.

[0006] To achieve the above objectives, the present application provides an energy absorbing device for assisting a human body in high altitude landing, the energy absorbing device comprising:

[0007] Multiple base plates, ends of every two adjacent base plates are hinged to each other, and each base plate forms a long chain plate that can be unfolded or folded;

[0008] A first energy absorbing half body, wherein the number of the first energy absorbing half bodies is one less than the number of the base plates, wherein, except for a base plate located at one end of the long chain plate, a first energy absorbing half body is arranged on one surface of each base plate, and the first energy absorbing half body comprises a first base and a plurality of annular bodies arranged on one surface of the first base, and the other surface of the first base is connected to the base plate;

[0009] A second energy absorbing half body, wherein the number of the second energy absorbing half bodies is one less than the number of the base plates, wherein, except for a base plate located at the other end of the long chain plate, a second energy absorbing half body is arranged on one surface of each base plate, and the second energy absorbing half body comprises a second base and a plurality of hook structures arranged on one surface of the second base, and the other surface of the first base is connected to the base plate; wherein,

[0010] When the long chain plate is folded, at least one of the hook structures hooks the annular body;

[0011] When an external force causes the hook structure to separate from the annular body, the long chain plate switches from the folded position to the unfolded position, and during the switching process, the energy absorption mechanism at least partially absorbs the external force;

[0012] The energy absorbing device can be transformed from the folded position to the unfolded position or from the unfolded position to the folded position by external force.

[0013] Optionally, the energy absorbing device further comprises:

[0014] A connecting rope, one end of which is connected to another surface of the long chain plate at one end of the long chain plate and having a first energy absorbing half body disposed thereon;

[0015] A safety belt for aerial work, wherein the safety belt for aerial work is connected to a surface of the long chain plate which is located at one end and has a second energy absorbing half body disposed on one surface.

[0016] Optionally, the energy absorbing device further comprises:

[0017] A distance sensor is provided on each substrate, and the distance sensor is used to obtain the distance between the substrate on which it is located and the substrate opposite to the substrate. Among them, among every two opposite substrates, only one surface of one substrate is provided with the distance sensor.

[0018] Optionally, the energy absorbing device further comprises:

[0019] An electrically controlled telescopic mechanism is provided on each substrate, a fixed end of the electrically controlled telescopic mechanism is provided on the substrate, and the telescopic end of the electrically controlled telescopic mechanism can be close to or away from the fixed end of the electrically controlled telescopic mechanism.

[0020] Optionally, the energy absorbing device further includes a camera device, which is installed on the safety belt for aerial work and is used to capture images of the surrounding environment.

[0021] Optionally, the energy absorbing device further comprises:

[0022] A master controller, wherein the master controller is respectively connected to each of the distance sensors, the camera device and the electrically controlled telescopic mechanism, and the master controller is used to obtain the distance information transmitted by each distance sensor and / or the surrounding environment image transmitted by the camera device, and control one or more movements of the electrically controlled telescopic mechanism according to the distance information.

[0023] The present application also provides a method for using an energy absorbing device, the method for using the energy absorbing device comprising:

[0024] Obtaining video stream information captured by a camera device;

[0025] Determine whether the video is currently in use based on the video stream information. If so,

[0026] Obtain the distance information transmitted by each distance sensor;

[0027] Obtaining the deployment length of the current energy absorbing device according to each distance information;

[0028] According to the current deployment length of the energy absorbing device and the preset floor height information, it is determined whether one or more of the electric control telescopic mechanisms need to be controlled. If so,

[0029] One or more telescopic ends of the electrically-controlled telescopic mechanisms are controlled to be away from the electrically-controlled telescopic mechanisms.

[0030] Optionally, before acquiring the surrounding environment image captured by the camera device, the method for using the energy absorbing device further comprises:

[0031] Obtain the distance information transmitted by each distance sensor;

[0032] According to the distance information transmitted by each distance sensor, it is determined whether to send a shooting request to the camera device. If so,

[0033] A shooting request is sent to the camera device.

[0034] The energy absorption device of the present application is coupled with a hook structure with a protruding thorn surface and a rough surface annular body opposite thereto. The interlocked hook structure and the annular body can form a relatively stable hooking interaction force, and the hooking and detaching of the hook and the annular body can be repeated many times.

[0035] In actual use, the user grabs one of the base plates and then falls from the air. During the falling process, the energy absorbing effect between the first energy absorbing half body and the second energy absorbing half body is used to buffer the force of the person's fall, so that the person can land smoothly on the ground or land at a height that does not pose a threat to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of an energy absorption device according to an embodiment of the present application. Figure 2 Schematic diagram of the use of the energy absorbing device in one embodiment of the present application. Figure 3 FIG. 4 is a schematic diagram of a cohesive region in an embodiment of the present application. Figure 4 It is a schematic diagram of the interface effect when the rough surface and the thorny surface of the interface are separated in one embodiment of the present application.

[0037] Reference numerals

[0038] 1. Base plate, 2. First energy absorbing half body, 3. Ring body, 4. Second energy absorbing half body, 5. Hook structure, 6. Distance sensor, 7. Electric control telescopic mechanism. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of this application are described in detail below in conjunction with the drawings.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0041] Figure 1 It is a schematic structural diagram of an energy absorption device according to an embodiment of the present application.

[0042] like Figure 1 The energy absorbing device shown comprises a plurality of substrates 1, a first energy absorbing half body 2, and a second energy absorbing half body 4, wherein:

[0043] The ends of every two adjacent base plates 1 are hinged to each other, and each base plate 1 forms a long chain plate that can be unfolded or folded;

[0044] The number of the first energy absorbing half bodies 2 is one less than the number of the base plates 1, wherein, except for a base plate 1 located at one end of the long chain plate, a first energy absorbing half body 2 is arranged on one surface of each base plate 1, and the first energy absorbing half body 2 includes a first base and a plurality of annular bodies 3 arranged on one surface of the first base, and the other surface of the first base is connected to the base plate;

[0045] The number of the second energy absorbing half bodies 4 is one less than the number of the base plates, wherein, except for a base plate 1 located at the other end of the long chain plate, a second energy absorbing half body 4 is arranged on one surface of each base plate 1, and the second energy absorbing half body 4 includes a second base and a plurality of hook structures 5 arranged on one surface of the second base, and the other surface of the first base is connected to the base plate 1; wherein,

[0046] When the long chain plate is folded, at least one hook structure 5 hooks the annular body;

[0047] When an external force causes the hook structure 5 to separate from the annular body, the long chain plate switches from the folded position to the unfolded position, and during the switching process, the energy absorption mechanism at least partially absorbs the external force;

[0048] The energy absorbing device can be transformed from the folded position to the unfolded position or from the unfolded position to the folded position by external force.

[0049] The energy absorption device of the present application is coupled with a hook structure with a protruding thorn surface and a rough surface annular body opposite thereto. The interlocked hook structure and the annular body can form a relatively stable hooking interaction force, and the hooking and detaching of the hook and the annular body can be repeated many times.

[0050] In actual use, the user grabs one of the base plates and then falls from the air. During the falling process, the energy absorbing effect between the first energy absorbing half body and the second energy absorbing half body is used to buffer the force of the person's fall, so that the person can land smoothly on the ground or land at a height that does not pose a threat to the human body.

[0051] In this embodiment, the interlocking hook structure and the annular body can form a relatively stable hooking interaction force, and the hooking and disconnecting of the hook and the annular body can be repeated many times. This structure has the advantages of being easy to use, safe, maintenance-free, and highly reusable. In addition, the sound emitted by the hook structure and the rough-surfaced annular body opposite thereto during the tearing process has a warning and reminder function under certain circumstances. Since the external load required to pull apart and peel off the connected hook structure and the rough-surfaced annular body opposite thereto is much greater than the force required to make them fit together, and the tearing force generated by the hook structure and the rough-surfaced annular body opposite thereto during the peeling process is very stable, the energy that can be absorbed by the hook structure and the rough-surfaced annular body opposite thereto when they are separated is much higher than the energy required when they are combined. In addition, the various substrates of the present application are connected by hinges, which can achieve a high folding and unfolding ratio, making transportation and storage convenient.

[0052] In this embodiment, the energy absorption device further includes a connecting rope and a safety belt for aerial work, one end of the connecting rope is connected to another surface located at one end of the long chain plate and having a first energy absorbing half-body provided on one surface; the safety belt for aerial work is connected to another surface located at one end of the long chain plate and having a second energy absorbing half-body provided on one surface.

[0053] Specifically, the energy absorbing device of the present application can be used in an environment to prevent people from falling from a high altitude. For example, a user needs to jump from the third floor of a building. At this time, the energy absorbing device of the present application is used to tie a fixed object (such as a pillar of a building or a pillar) with one end of the connecting rope. Figure 2 As shown, the building has an outer wall, and the connecting rope is fixed on the outer wall), and then the user puts on a safety belt for high-altitude work. At this time, when jumping from the outside of the building, the potential energy of the jump is absorbed by the energy-absorbing device of the present application, so that the user can slowly fall to a position close to the ground.

[0054] In this embodiment, the safety belt for aerial work and the connecting rope are both devices that can be used for outdoor climbing, and therefore, they are sufficient to support the weight of a human body when it falls.

[0055] In this embodiment, the first energy absorbing half body 2 and the second energy absorbing half body 4 of the present application may be made of nylon and polyester.

[0056] In this embodiment, the side of the first energy absorbing half body 2 having the randomly densely packed annular bodies is called a rough side.

[0057] The side of the second energy absorbing half body 4 with neatly arranged hooks is called the thorn side.

[0058] See also Figure 1 In this embodiment, when the hair surface and the thorn surface are attached to each other, the hooks of the thorn surface wrap around the annular body of the hair surface, and mechanical interlocking occurs through the microstructure of the interface, so that the two interfaces have a large peeling strength. Both nylon and polyester have good elasticity. The elastic modulus of nylon material is about 2.8-3.8GPa, and the elastic modulus of polyester can reach 14-17GPa. Because both nylon and polyester have good resilience, the hooks and the annular body can return to their original shape after deformation, so multiple peeling can be achieved and a relatively stable interface strength can be maintained.

[0059] In this embodiment, one end of each two substrates is connected by a hinge, and a fold is formed between the two.

[0060] In this embodiment, the substrate is a PVC board.

[0061] In this embodiment, the lengths of the rough surface, the thorn surface and the PVC board are respectively represented by l m , l c and l p The widths of the rough surface, thorn surface and PVC board are represented by w m 、w c and w p The thickness of the rough surface, thorn surface and PVC board are represented by t m ,t c and tp express.

[0062] It is understood that, in one embodiment, m , l c and l p can be equal, in one embodiment, w m 、w c and w p Can be equal.

[0063] In this embodiment, the first base and the second base may be made of plastic glue, that is, the rough surface and the thorny surface are glued to the front and back surfaces of the PVC board by means of plastic glue.

[0064] In this embodiment, it is assumed that there are two adjacent substrates A, substrate B, and substrate C, wherein one surface of substrate A is opposite to a surface of substrate B, and the other surface of substrate A is opposite to a surface of substrate C, wherein the surface opposite to substrate B is called the first surface of substrate A, and the surface opposite to substrate C is called the second surface of substrate A, a surface of substrate B opposite to the first surface of substrate A can be called the first surface of substrate B, and the other surface of substrate B is called the second surface of substrate B, the surface of substrate C opposite to the second surface of substrate A is called the first surface of substrate C, and the other surface of substrate C is called the second surface of substrate C.

[0065] In this embodiment, if the first energy absorbing half body is disposed on the first surface of substrate A, the second energy absorbing half body is disposed on the first surface of substrate B, and the second energy absorbing half body is disposed on the second surface of substrate A, then the first energy absorbing half body is disposed on the first surface of substrate C.

[0066] In this embodiment, the energy absorption device further includes a distance sensor. A distance sensor is arranged on each substrate, and the distance sensor is used to obtain the distance between the substrate on which it is located and the substrate opposite to the substrate. Among them, among every two opposite substrates, only one surface of each substrate is provided with the distance sensor.

[0067] Taking the above-mentioned substrate A, substrate B and substrate C as an example, a distance sensor is arranged on the surface of substrate A opposite to substrate B, and a distance sensor is arranged on the surface of substrate B opposite to substrate C.

[0068] It is understandable that a distance sensor may be provided on the surface of substrate B opposite to substrate A, and a distance sensor may be provided on the surface of substrate C opposite to substrate B.

[0069] It is understandable that a distance sensor may be provided on each surface of each substrate.

[0070] By setting a distance sensor, the opening degree of two adjacent base plates can be sensed, so that the unfolding condition of the entire long chain plate can be understood.

[0071] In one embodiment, the distance sensor is disposed near one end where the two substrates are connected to each other. In this way, when the two substrates are separated from each other, the distance sensor can obtain the distance from the substrate on which it is disposed (for example, substrate A) to another substrate (based on substrate B) in real time, and the opening angle of the two substrates can be obtained by the distance.

[0072] It is understandable that the distance sensor can also be set at other positions, because, in specific operations, by adjusting the direction of the distance sensor, it can be ensured that it can measure the distance between the two before opening to a certain angle (for example, the angle between substrate A and substrate B is 90 degrees).

[0073] In this embodiment, the present application further includes an electrically controlled telescopic mechanism, and each substrate is provided with an electrically controlled telescopic mechanism, the fixed end of the electrically controlled telescopic mechanism is provided on the substrate, and the telescopic end of the electrically controlled telescopic mechanism can be close to or away from the fixed end of the electrically controlled telescopic mechanism.

[0074] The reason for setting up an electric-controlled telescopic mechanism is that the weight of users who jump from buildings is different. Some users who jump from buildings can use their weight to unfold each substrate to a more appropriate degree, even if the user can touch the ground or jump to the ground. However, some users are lighter and may not be able to unfold each substrate to a more appropriate angle through their own gravity. In other words, the user may still be in mid-air at this time. However, it is still dangerous for the user to stay in mid-air for a long time. At this time, external force is needed to unfold each substrate to a more appropriate degree. At this time, the substrate can be pushed by the electric-controlled telescopic mechanism. For example, the fixed end of an electric-controlled telescopic mechanism is set on substrate A, and the telescopic end is controlled to extend to push substrate B away from substrate A.

[0075] In this way, the movement of the electrically controlled telescopic mechanism is controlled in a time-sharing or simultaneous manner, thereby achieving a slow descent of the user.

[0076] In this embodiment, substrate A, substrate B, and substrate C form a long chain plate, wherein substrate C serves as one end of the long chain plate, and the second surface of substrate C is not provided with the first energy absorbing half and the second energy absorbing half, and substrate B serves as the other end of the long chain plate, and the second surface of substrate B is also not provided with the first energy absorbing half and the second energy absorbing half.

[0077] In this embodiment, the energy absorbing device further includes a camera device, which is installed on the safety belt for aerial work and is used to capture images of the surrounding environment.

[0078] Through the video stream captured by the camera device, we can determine whether the energy absorbing device of the present application is being deployed, or whether the surrounding environment is outdoors and moving at any time.

[0079] In this embodiment, the energy absorption device further includes a master controller, which is respectively connected to each of the distance sensors, the camera device and the electrically-controlled telescopic mechanism. The master controller is used to obtain the distance information transmitted by each distance sensor and / or the surrounding environment image transmitted by the camera device, and control one or more movements of the electrically-controlled telescopic mechanism according to the distance information.

[0080] In this embodiment, the energy absorption performance of the energy absorption device of the present application can be obtained through an electronic universal testing machine, a force sensor, a camera, a tensile fixture, an acrylic plate, and a test piece.

[0081] The present application also provides an energy absorbing device design method for the energy absorbing device as described above, the energy absorbing device design method comprising:

[0082] Obtaining basic parameters of the current application scenario, wherein the basic parameters of the current application scenario include user weight information and expandable size;

[0083] Obtain the total amount of energy to be absorbed based on the basic parameters of the current application scenario;

[0084] Obtain the number of fold layers and the length of each substrate according to the basic parameters of the current application scenario;

[0085] Obtain the number of base plates constituting the long chain plate according to the number of folding layers;

[0086] Get substrate material information;

[0087] Obtain the length of the cohesive zone according to the substrate material information;

[0088] The magnitude of the stable tearing force of each energy absorbing device is obtained according to the length of the cohesive zone, the number of fold layers, the length of each substrate, and the total amount of energy to be absorbed;

[0089] Obtaining the initial ring body density per unit area and the initial hook structure density per unit area;

[0090] Obtaining the width of each substrate according to the magnitude of the stable tearing force between each first energy absorbing half body and the corresponding second energy absorbing half body;

[0091] Obtaining the area of ​​the annular body of the first energy absorbing half body on the substrate according to the width, length and initial annular body density per unit area of ​​the substrate;

[0092] According to the width and length of the substrate and the initial density of the hook structures per unit area, the area of ​​the second energy absorbing half body on the substrate where the hook structures are arranged is obtained;

[0093] The energy absorbing device model is generated according to the width of each substrate, the length of each substrate, the number of fold layers, the area of ​​the hook structure of the second energy absorbing half body on the substrate, and the area of ​​the hook structure of the second energy absorbing half body on the substrate.

[0094] In this embodiment, the current application scenario refers to the scenario in which the energy absorbing device needs to be used. For example, a person jumping from a fifth-floor building is one application scenario, and a person jumping from a third-floor building is another application scenario.

[0095] In each application scenario, there is user weight information and expandable dimensions.

[0096] The total amount of energy to be absorbed can be obtained through the user's weight information and the deployable size. Specifically, the total amount of energy to be absorbed is obtained according to the basic parameters of the current application scenario using the following formula:

[0097] EA = (mgh) * 98%; where

[0098] EA is the total amount of energy to be absorbed, m is the user's weight information, g is the gravitational acceleration, and h is the deployable size.

[0099] The above formula can be used to know the energy absorption required for this application. In this application, the energy absorption is set to 98% because, in some cases, it is uncertain whether the ground is dangerous. Therefore, the amount that allows a person to just touch the ground will not be directly set. Instead, a certain space is given to allow the user to decide whether to touch the ground. The total amount of energy to be absorbed can be set as needed.

[0100] In this embodiment, the number of fold layers and the length of each substrate are obtained according to the basic parameters of the current application scenario;

[0101] In this embodiment, obtaining the number of fold layers and the length of each substrate according to the basic parameters of the current application scenario includes:

[0102] Acquire a crease layer number database, wherein the crease layer number database includes basic parameters of at least one application scenario and a tuple corresponding to the basic parameters of each application scenario, wherein the tuple includes the crease layer number and the length of each substrate;

[0103] Get the number of fold layers and the length of each substrate in the binary group corresponding to the basic parameters of the current application scenario.

[0104] Specifically, preliminary tests can be used to determine the appropriate number of fold layers and the length of each PVC board at different floors (or heights). For example, if the height is 5 meters and the weight of a human body is 100 kilograms, the designer will find through preliminary design simulation models that each base plate is 1 meter and a total of 5 folds are more appropriate. In this case, each base plate can be 1 meter long, with a total of 5 folds.

[0105] It is understandable that the database can set the relationship between height, weight, fold and substrate length according to the user's ideas.

[0106] In this embodiment, the substrate material information may include the following:

[0107] The comprehensive thickness is the superposition of thickness, elastic modulus, Poisson's ratio, substrate, second base and equivalent thickness of adhesive.

[0108] In this embodiment, parameters such as the curvature of the hook structure can be set according to one's own needs.

[0109] In this embodiment, the length of the cohesive region is obtained according to the substrate material information.

[0110] See also Figure 3 , Figure 3 shows a schematic diagram of the cohesive zone. It can be understood that Figure 3 In order to indicate various parameters, the first energy absorbing half body and the second energy absorbing half body are omitted in the drawing.

[0111] The cohesive force model is a widely used and studied computational model in elastic-plastic fracture mechanics. The cohesive force model proposes that there is a small cohesive force region at the crack tip, and the stress in this region is a function of the cracking displacement value. The equivalent relationship between the traction force and the opening displacement near the crack tip can be described by the local traction force-cracking displacement relationship.

[0112] In the cohesive region, the traction increases with the increase of crack displacement. The maximum traction is regarded as the interface strength, and the area enclosed by the traction-displacement curve is regarded as the interface toughness. When the interface crack distance reaches the critical value, the interface will break and the interface crack will expand.

[0113] The cohesive force model can better simulate the mechanical characteristics of crack propagation behavior and interface separation due to the introduction of cohesive force area and cohesive force. The current classic cohesive force models include linear, power exponential, trapezoidal, rectangular and other forms. Since the separation tip will maintain a certain closing trend when the interface rough surface and the thorn surface are separated, the magnitude of the cohesive force on the open crack surface is related to the degree of deformation of the hook of the thorn surface microstructure. The greater the deformation of the hook, that is, the greater the crack opening, the greater the traction force of the hook on the annular body. Based on this feature, this application uses a cohesive force interface model of a linear stress law to describe the interface action when the interface rough surface and the thorn surface are separated, such as Figure 4 shown.

[0114] In this embodiment, since the loading direction of the hook structure of the hair surface on the thorn surface in the interface is usually perpendicular to the base direction of the thorn surface, the direction of the interface separation tearing force is considered to be perpendicular to the base plane, that is, a 90° film tearing model, such as Figure 3 shown.

[0115] The film is considered as a plane strain model, adhered to a rigid substrate, and the tearing force F acts on the right end of the film, which is always perpendicular to the substrate. The horizontal distance between the tearing force F and the crack tip is represented by L. The entire interface tearing process is divided into two regions: the cohesive region and the fracture failure region. The cohesive region is affected by the cohesive force, that is, the claw structure of the thorn surface is affected by the traction force of the rough surface annular body. The cohesive force in the fracture failure region is zero, that is, the rough surface and the thorn surface are completely separated.

[0116] In the interfacial tearing test, the thorn surface is usually fixed as the base and the fleece surface is fixed as the tearing surface. The fleece surface is made of polyester and has a small bending stiffness that can be ignored. Its bending stiffness is determined by the substrate to which it is attached.

[0117] When the bending stiffness of the substrate at the interface is small enough, the fracture failure zone can be ignored, that is, the tear force is considered to act directly at the critical position of the interface separation. When the bending stiffness of the substrate cannot be ignored, the role of the fracture failure zone must be considered. The length of the cohesive zone is represented by l, and the length of the cohesive zone is related to the bending stiffness of the film.

[0118] In this embodiment, the film is subjected to the cohesive zone traction force T, the tearing force F2 and the tearing force bending moment in the cohesive zone. According to the displacement boundary condition y(0)=y'(0)=0, the deflection expression of the cohesive zone film can be set as follows:

[0119] y2=ax 2 +bx 3 +cx 5

[0120] Among them, a, b, and c are the coefficients of the membrane deflection expression.

[0121] The deflection of the cohesive zone film must also satisfy the boundary conditions:

[0122] in,

[0123] It is the critical displacement for the first energy absorbing half body to separate from the second energy absorbing half body.

[0124] According to the deflection expression, the bending moment distribution in the cohesive zone can be expressed as:

[0125] M2=E * I(20cx 3 +6bx+2a); where

[0126] M2 is the bending moment distribution in the cohesive zone, E * =E / (1-μ 2 ), where E represents the elastic modulus of the first energy-absorbing half, I = t 3 / 12, represents the moment of inertia of the tear-off layer per unit width, where t represents the thickness of the tear-off layer, μ represents the Poisson's ratio, and a, b, and c are the coefficients of the film deflection expression.

[0127] In the cohesive zone length l, the tearing force bending moment can be expressed as:

[0128] M F =-E * I(20cl 3 +6bl+2a); among them,

[0129] E * =E / (1-μ 2 ), where E represents the elastic modulus of the peeling layer, μ represents Poisson's ratio, and I = t 3 / 12 represents the moment of inertia of the tear-off layer per unit width, where t represents the thickness of the tear-off layer, the length of the cohesive zone is l, and a, b, and c are the coefficients of the film deflection expression.

[0130] Therefore, the total potential energy of the cohesive region of the film can be expressed as:

[0131] in,

[0132] ∏ represents the total potential energy of the cohesive zone of the film, M2 is the bending moment distribution of the cohesive zone, and E * =E / (1-μ 2 ), where E represents the elastic modulus of the peeling layer, I = t 3 / 12, represents the moment of inertia of the peeling layer per unit width, y2 is the deflection expression of the film in the cohesive zone, d represents the differential, F2 represents the interface peeling force, is the critical displacement for the separation of the first energy absorbing half body from the second energy absorbing half body, is the bending moment effect of the tearing force on the right boundary of the cohesive zone at x = l2, where: Where L is the position where the tear force F acts; θ is Figure 3 Angle shown.

[0133] According to the minimum potential energy principle, among all the displacement groups that satisfy the displacement boundary conditions, the actual existing displacement group should make the total potential energy an extreme value, so:

[0134] in,

[0135] Therefore, according to the boundary conditions of the deflection of the cohesive zone film and the principle of minimum potential energy, the values ​​of the coefficients a, b, c and the cohesive zone length l in the deflection expression can be calculated.

[0136] In this embodiment, the above parameters can be determined through experiments after the material parameters of the substrate are selected.

[0137] In this embodiment, the magnitude of the stable tearing force of each energy absorbing device is obtained according to the length of the cohesive zone, the number of fold layers, the length of each substrate, and the total amount of energy to be absorbed.

[0138] In this embodiment, the stable tearing force of each first energy absorbing half body and the corresponding second energy absorbing half body is obtained according to the length of the cohesive zone, the length of each substrate, and the total amount of energy to be absorbed, and the following formula is used to obtain the stable tearing force of each first energy absorbing half body and the corresponding second energy absorbing half body:

[0139] in,

[0140] EA is the total amount of energy to be absorbed, L f is the length of the substrate, where the lengths of the substrates are equal, l is the length of the cohesive zone, and F steady It is the magnitude of the stable tearing force between the first energy absorbing half body and the corresponding second energy absorbing half body.

[0141] In this embodiment, the initial annular body density per unit area and the initial hook structure density per unit area are obtained. It can be understood that the initial value can be set according to the user's needs. If the width of the substrate calculated after the setting is too wide and the user does not need such a wide substrate, the initial annular body density per unit area and the initial hook structure density per unit area can be changed (for example, increased) to reduce the width of the substrate.

[0142] In this embodiment, the width of each substrate is obtained according to the magnitude of the stable tearing force of each first energy absorbing half body and the corresponding second energy absorbing half body, using the following formula:

[0143] F steady =G c w f

[0144] ;in,

[0145] F steady is the stable tearing force between the first energy absorbing half and the corresponding second energy absorbing half, G c is the value of the external force work required by the hook structure per unit area when the hook structure and the annular body are separated, obtained through experiments, w f is the width of the substrate.

[0146] In this embodiment, the area of ​​the annular body of the first energy absorbing half is equal to the length multiplied by the width of the substrate.

[0147] In this embodiment, the area of ​​the second energy absorbing half body where the hook structure is arranged is equal to the length and width of the base plate.

[0148] It is understandable that if it is desired that the area of ​​the annular body of the first energy absorbing half is smaller than the length multiplied by the width of the substrate, the length or width of the substrate can be increased again after this step.

[0149] It is understandable that if it is desired that the area of ​​the annular body of the second energy absorbing half is smaller than the length multiplied by the width of the substrate, the length or width of the substrate can be increased again after this step.

[0150] In this embodiment, the first energy absorbing half body and the second energy absorbing half body have the same area.

[0151] In this embodiment, after the above parameters are obtained, the energy absorbing device model of this application can be generated through a finite element model or three-dimensional modeling software.

[0152] After the energy absorbing device model of the present application is generated, it can be manufactured. It can be understood that the manufactured energy absorbing device can be tested, so that the designer can adjust the crease layer number database of the present application according to the test results.

[0153] The present application also provides a method for using an energy absorbing device, the method for using the energy absorbing device comprising:

[0154] Obtaining video stream information captured by a camera device;

[0155] Determine whether the video is currently in use based on the video stream information. If so,

[0156] Obtain the distance information transmitted by each distance sensor;

[0157] Obtaining the deployment length of the current energy absorbing device according to each distance information;

[0158] According to the current deployment length of the energy absorbing device and the preset floor height information, it is determined whether one or more of the electric control telescopic mechanisms need to be controlled. If so,

[0159] One or more telescopic ends of the electrically-controlled telescopic mechanisms are controlled to be away from the electrically-controlled telescopic mechanisms.

[0160] In this embodiment, before acquiring the surrounding environment image captured by the camera device, the method for using the energy absorbing device further includes:

[0161] Obtain the distance information transmitted by each distance sensor;

[0162] According to the distance information transmitted by each distance sensor, it is determined whether to send a shooting request to the camera device. If so,

[0163] A shooting request is sent to the camera device.

[0164] In actual use, it is first necessary to determine whether the energy absorption device of the present application is in use. Only when it is in use is the control of each device involved.

[0165] Through the information transmitted by each distance sensor, the situation between each substrate can be obtained. If multiple substrates are separated from each other, then theoretically they should be used at this time. However, it is also possible that the user turns on the energy absorption device of the present application at home. Therefore, further judgment is made through the video stream obtained by the camera device.

[0166] By using image recognition for each frame of the video stream, it is possible to determine whether the energy absorbing device of the present application is outdoors and whether the scenes in each frame of the image are basically different. If they are different, it means that the energy absorbing device of the present application is indeed in use.

[0167] It can be understood that in one embodiment, while judging each frame of the video stream, the information of each distance sensor continues to be obtained. When it is judged through the image that it is indeed outdoors and each frame of the image is different, and one or more distance information in each distance sensor is increasing, it is judged that the current state is in use.

[0168] When it is determined that the current state is in use, the distance information transmitted by each distance sensor is obtained in real time;

[0169] The unfolded length of the current energy absorbing device is obtained according to each distance information. Taking a distance sensor as an example, when the distance information transmitted by the distance sensor is known, the opening angle between the two substrates is known, and the length of the substrate is known. The height of the opening of the two substrates at this time can be known through trigonometric functions.

[0170] When the deployed length of the current energy absorbing device is obtained and the height of the current installation position of the energy absorbing device is known (the height will be preset in the main controller of this application during installation), it is now known whether the user will be injured if he falls to the ground.

[0171] For example, the unfolded length is 10 meters, and the current energy absorption device is installed at a height of 15 meters, which means a difference of 5 meters. Assuming the user is 1.5 meters tall, the user needs to fall from a height of about 3 meters, which may easily injure the user.

[0172] At this time, the unfolded length can be made larger by controlling one or more of the electrically controlled telescopic mechanisms.

[0173] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy absorbing device for assisting a human body in high altitude landing, characterized in that: The energy absorbing device comprises: A plurality of base plates (1), the ends of each two adjacent base plates (1) are hinged to each other, and each base plate (1) forms a long chain plate that can be unfolded or folded; A first energy absorbing half body (2), the number of the first energy absorbing half bodies (2) being one less than the number of the base plates (1), wherein, except for a base plate (1) located at one end of the long chain plate, a first energy absorbing half body (2) is arranged on one surface of each base plate (1), the first energy absorbing half body (2) comprising a first base and a plurality of annular bodies (3) arranged on one surface of the first base, and the other surface of the first base being connected to the base plate; A second energy absorbing half body (4), the number of the second energy absorbing half bodies (4) being one less than the number of the base plates, wherein, except for a base plate (1) located at the other end of the long chain plate, a second energy absorbing half body (4) is arranged on one surface of each base plate (1), the second energy absorbing half body (4) comprises a second base and a plurality of hook structures (5) arranged on one surface of the second base, and the other surface of the first base is connected to the base plate (1); wherein, When the long chain plate is folded, at least one of the hook structures (5) hooks the annular body; When an external force causes the hook structure (5) to separate from the annular body, the long chain plate is transformed from a folded position to an unfolded position, and during the transformation process, the energy absorption mechanism at least partially absorbs the external force; The energy absorbing device can be transformed from the folded position to the unfolded position or from the unfolded position to the folded position by external force.

2. The energy absorbing device according to claim 1, characterized in that: The energy absorbing device further comprises: A connecting rope, one end of which is connected to another surface of the long chain plate at one end of the long chain plate and having a first energy absorbing half body disposed thereon; A safety belt for aerial work, wherein the safety belt for aerial work is connected to a surface of the long chain plate which is located at one end and has a second energy absorbing half body disposed on one surface.

3. The energy absorbing device according to claim 2, characterized in that: The energy absorbing device further comprises: A distance sensor is provided on each substrate, and the distance sensor is used to obtain the distance between the substrate on which it is located and the substrate opposite to the substrate. Among them, among every two opposite substrates, only one surface of one substrate is provided with the distance sensor.

4. The energy absorbing device according to claim 3, characterized in that: The energy absorbing device further comprises: An electrically controlled telescopic mechanism is provided on each substrate, a fixed end of the electrically controlled telescopic mechanism is provided on the substrate, and the telescopic end of the electrically controlled telescopic mechanism can be close to or away from the fixed end of the electrically controlled telescopic mechanism.

5. The energy absorbing device according to claim 4, characterized in that: The energy absorbing device further comprises a camera device, which is mounted on the safety belt for aerial work and is used to capture images of the surrounding environment.

6. The energy absorbing device according to claim 5, characterized in that: The energy absorbing device further comprises: A master controller, wherein the master controller is respectively connected to each of the distance sensors, the camera device and the electrically controlled telescopic mechanism, and the master controller is used to obtain the distance information transmitted by each distance sensor and / or the surrounding environment image transmitted by the camera device, and control one or more movements of the electrically controlled telescopic mechanism according to the distance information.

7. A method for using an energy absorbing device, characterized in that: The method for using the energy absorbing device comprises: Obtaining video stream information captured by a camera device; Determine whether the video is currently in use based on the video stream information. If so, Obtain the distance information transmitted by each distance sensor; Obtaining the deployment length of the current energy absorbing device according to each distance information; According to the current deployment length of the energy absorbing device and the preset floor height information, it is determined whether one or more of the electric control telescopic mechanisms need to be controlled. If so, One or more telescopic ends of the electrically-controlled telescopic mechanisms are controlled to be away from the electrically-controlled telescopic mechanisms.

8. The method for using the energy absorbing device according to claim 7, characterized in that: Before acquiring the surrounding environment image captured by the camera device, the method for using the energy absorbing device further includes: Obtain the distance information transmitted by each distance sensor; According to the distance information transmitted by each distance sensor, it is determined whether to send a shooting request to the camera device. If so, A shooting request is sent to the camera device.

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