Device and method for bonding shank zipper of automobile crash dummy

Abstract

The invention relates to the technical field of vehicle collision testing, in particular to a device and method for bonding a shank zipper of an automobile collision dummy. The shank skin fixing platform is used for fixing the skin of the shank of the collision dummy; the laser scanning device is used for scanning the skin and transmitting scanning data to the intelligent control system; the intelligent control system is used for generating a zipper bonding track according to the scanning data and transmitting the zipper bonding track to the glue smearing structure; the glue smearing structure is used for smearing glue on the skin along a zipper bonding track under the control of the intelligent control system; and the honeycomb array pressing rod is used for pressing and standing the zipper under the control of the intelligent control system after the glue is smeared on the skin and the zipper is placed along the glue path. The production process of the automobile crash dummy can be optimized, the production efficiency of the dummy shank is improved, and conditions are provided for large-scale or rapid production of the dummy in the future.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle collision testing, and in particular to a device and method for bonding a zipper on the calf of a car collision dummy. Background Art

[0002] As the core equipment for vehicle safety performance testing, the design and optimization of the lower leg area of ​​the car crash dummy has important scientific significance and engineering value in collision safety assessment.

[0003] During the current manufacturing process of mannequin calf skin, a zipper needs to be installed on the calf skin. Since the thickness of the calf skin is uneven, it is not convenient to sew the zipper directly on the skin. Therefore, the existing process is to first sew the zipper on a thin skin strip made of the same material as the mannequin skin, and then use glue to stick the skin strip with the zipper to the mannequin's calf. After applying the glue, a clip is also needed to fix the zipper to the skin to enhance the bonding effect.

[0004] During the production process of automobile crash dummies, a zipper needs to be glued to the back of the calf of the dummy to facilitate disassembly, assembly and testing of the automobile crash dummy during use. The current method of gluing the zipper on the calf skin of automobile crash dummies relies entirely on manual labor, with low repeatability and low production efficiency. It can meet the needs of small-scale production but is difficult to meet the needs of large-scale production or emergency production. The main difficulty in gluing calf skin zippers nowadays is that the calf skin where the zipper is glued is a curved structure, and traditional fixing methods are difficult to clamp stably. After applying glue, the calf skin zipper needs to be fixed and left to stand still with a clamp. The uneven pressure on different parts during standing will also affect the bonding effect. The thickness of different parts of the calf skin is uneven, and manual labor cannot stably control the force when the clamp is clamped. Too much pressure will cause the glue to overflow, and too little pressure will make it loose, affecting the bonding effect of the zipper.

[0005] The calf skin of a car crash dummy is similar to that of a real person, with both surfaces possessing curved structures. Fast, efficient, and stable zipper bonding on curved surfaces is a difficult problem to solve with current technology. This application was filed in light of this. Summary of the Invention

[0006] The purpose of this application is to provide a device and method for bonding zippers on the calf of a car crash dummy, so as to optimize the production process of the car crash dummy, speed up the production efficiency of the dummy calf, and provide conditions for the large-scale or rapid production of dummies in the future.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application provides a device for bonding a zipper on the calf of a car crash dummy, comprising: Calf skin fixation platform, used to fix the skin of the crash dummy's calf; A laser scanning device, used for scanning the skin and transmitting the scan data to an intelligent control system; The intelligent control system is used to generate a zipper bonding track according to the scanning data and transmit the zipper bonding track to the glue applying structure; The glue applying structure is used to apply glue on the skin along the zipper bonding track under the control of the intelligent control system; The honeycomb array pressure rod is used to press and keep the zipper stationary under the control of the intelligent control system after glue is applied to the skin and the zipper is placed along the glue path.

[0008] In a second aspect, the present application provides a method for bonding a zipper on the calf of a car crash dummy, comprising: Collecting scan data of the skin of the crash dummy's lower leg using a laser scanning device; generating a zipper bonding trajectory according to the scan data; Controlling the glue applying structure to apply glue on the skin along the zipper bonding track; After the glue is applied to the skin and the zipper is placed along the glue path, the honeycomb array pressure rod is controlled to press the zipper and let it stand.

[0009] Compared with the prior art, the present invention has the following advantages: This application uses a laser scanning device to scan the skin of a car crash dummy's calf to determine the zipper bonding path. A glue-applying mechanism is automatically controlled to apply glue to the skin along the zipper bonding path. After the glue is applied to the skin and the zipper is positioned along the glue path, a honeycomb array pressure rod is automatically controlled to press and hold the zipper in place. This eliminates the need for manual glue application and pressure, achieving fast, efficient, and stable zipper bonding on curved skin surfaces. This optimizes the production process for car crash dummies and accelerates calf production efficiency, paving the way for future large-scale or rapid dummies. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0011] Figure 1 This is a schematic structural diagram of a device for bonding a zipper on the calf of a car crash dummy provided in an embodiment of the present application; Figure 2is a schematic structural diagram of a calf skin fixation platform provided in an embodiment of the present application; Figure 3 Schematic diagram of the structure of the laser scanning device provided in an embodiment of the present application; Figure 4 Schematic diagram of a zipper bonding track provided in an embodiment of the present application; Figure 5 It is a structural schematic diagram of the glue applying structure provided in an embodiment of the present application; Figure 6 This is a schematic structural diagram of a honeycomb array pressure bar provided in an embodiment of the present application; Figure 7 This is a schematic diagram of the structure inside the pressure rod provided in an embodiment of the present application; Figure 8 This is a flow chart of a method for bonding a zipper on the calf of a car crash dummy provided in an embodiment of the present application; Among them, 1-calf skin fixing platform, 2-laser scanning device, 3-glue coating structure, 4-honeycomb array pressure rod, 5-intelligent control system, 101-cage frame, 102-calf skin support rod, 103-support column, 104-slide rail protrusion, 105-platform motor, 106-first screw rod, 201-laser scanner, 202-second screw rod, 203-first slide rail groove, 204-slide rail motor, 205-intelligent Control information output end, 301-support base, 302-first rotary joint, 303-second rotary joint, 304-robotic arm, 305-glue storage box, 306-gear pump, 307-dispensing head, 401-pressure rod, 402-pressure control end, 403-second slide rail groove, 404-pressure rod motor, 405-third screw rod, 406-force sensor, 407-composite spring, 408-telescopic rod, 409-pressure head. DETAILED DESCRIPTION

[0012] The following description of exemplary embodiments of the present application is made in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0013] Figure 1 This is a schematic diagram of the structure of a device for bonding a zipper on the calf of a car crash dummy provided in an embodiment of the present application. This embodiment is suitable for bonding a zipper on the skin of a car crash dummy. Figure 1The device provided in this embodiment includes a calf skin fixation platform 1, a laser scanning device 2, an intelligent control system 5, a glue application structure 3, and a honeycomb array pressure rod 4. The laser scanning device 2 and the honeycomb array pressure rod 4 are connected to the calf skin fixation platform 1, and the intelligent control system 5 is in communication with the laser scanning device 2, the glue application structure 3, and the honeycomb array pressure rod 4, either wirelessly or by wire. The structure and function of each component are described in detail below: The calf skin fixation platform 1 is used to fix the skin of the crash dummy's calf. The laser scanning device 2 is used to scan the skin and transmit the scanned data to the intelligent control system 5. The intelligent control system 5 is used to generate a zipper bonding track based on the scanned data and transmit the zipper bonding track to the glue application structure 3. The glue application structure 3 is used to apply glue to the skin along the zipper bonding track under the control of the intelligent control system 5. The honeycomb array pressure rod 4 is used to press and hold the zipper in place after the glue is applied to the skin and the zipper is positioned along the glue path under the control of the intelligent control system 5. This embodiment requires manual placement of the zipper along the glue path.

[0014] This application uses a laser scanning device 2 to scan the skin of a car crash dummy's calf to determine the zipper bonding path. A glue application mechanism 3 is automatically controlled to apply glue to the skin along the zipper bonding path. After the glue is applied to the skin and the zipper is positioned along the glue path, a honeycomb array pressure rod 4 is automatically controlled to press and hold the zipper in place. This eliminates the need for manual glue application and pressure, achieving fast, efficient, and stable zipper bonding on the curved surface of the skin. This optimizes the production process for car crash dummies and accelerates the production efficiency of dummy calves. This paves the way for future large-scale or rapid dummies production.

[0015] Figure 2 It is a structural schematic diagram of the calf skin fixation platform provided in an embodiment of the present application, including a cage frame 101, and a calf skin support rod 102, a support column 103, a slide rail protrusion 104, a platform motor 105 and a screw rod 106 placed in the cage frame 101.

[0016] The calf skin support rod 102 is located below the cage frame 101 and is made in the style of a dummy's calf skeleton. It is used to fix the skin of the calf of the collision dummy. The support column 103 is used to support the calf skin support rod 102. The slide rail protrusion 104 is fixed above the cage frame 101 and is at least two in number. Figure 2 3 are shown), which are used to provide a path for the movement of the laser scanning device 2 and the honeycomb array pressure rod 4. Figure 2In the embodiment, the extension direction of the slide rail protrusion 104 is perpendicular to the axial direction of the calf, thereby providing a path perpendicular to the axial direction of the calf for the movement of the laser scanning device 2 and the honeycomb array pressure rod 4. The platform motor 105 is used to control the first screw rod 106 to move the laser scanning device 2 and the honeycomb array pressure rod 4 along the slide rail protrusion 104. In a specific application scenario, if the laser scanning device 2 is used, the first screw rod 106 is controlled to move the laser scanning device 2 above the skin. If the honeycomb array pressure rod 4 is used, the first screw rod 106 is controlled to move the honeycomb array pressure rod 4 above the skin.

[0017] Figure 3 This is a structural diagram of the laser scanning device provided in an embodiment of the present application. The laser scanning device 2 includes a laser scanner 201, a second screw rod 202, a first slide rail groove 203, a slide rail motor 204 and an intelligent control information output terminal 205.

[0018] The laser scanner 201 is connected to the second screw rod 202 for scanning the skin and transmitting the scanned data to the intelligent control system 5 through the intelligent control information output terminal 205. Optionally, the intelligent control information output terminal 205 is actually a communication terminal with communication capabilities such as Bluetooth and Wi-Fi. Figure 2 The laser scanner 201 engages with the slide protrusion 104 in the lower leg, and driven by the platform motor 105, the laser scanner 201 moves along the slide protrusion 104. The slide motor 204 controls the movement of the laser scanner 201 on the second lead screw 202. The second lead screw 202 is parallel to the calf axis. The slide motor 204 controls the laser scanner 201 to move along the calf axis. In this way, the laser scanner 201 achieves two-dimensional movement on the horizontal plane, allowing for comprehensive scanning of the left and right sides of the calf skin opening.

[0019] The intelligent control system 5 (e.g., a host computer) generates a zipper bonding track based on the scan data and transmits the zipper bonding track to the glue applying mechanism 3. Optionally, the scan data is the point cloud data of each point on the calf skin. An opening is reserved on the calf skin, with the two sides of the opening being the left and the right. The zipper bonding track includes the left track and the right track. To facilitate the description of the position of the track points, see Figure 4 , establish a coordinate system on the calf. The ankle joint is the origin, the Z axis is along the calf axis, the X axis is horizontal and perpendicular to the calf axis, and the Y axis is vertical and perpendicular to the X and Z axes. The intelligent control system 5 analyzes the scan data, extracts the trajectory points on the left side of the opening and performs fitting, and extracts the trajectory points on the right side of the opening and performs fitting. The fitting formula is as follows: ; ; ; ; ; in, x L ( z )and y L ( z ) are the coordinate points on the X-axis and Y-axis on the left side of the calf skin opening, x R ( z )and y R ( z ) are the coordinate points on the X-axis and Y-axis on the right side of the calf skin opening; z is the coordinate point on the Z-axis, z=0 at the center of the ankle joint, z=L (calf length) at the center of the knee joint, z a It is the upper reference point of the ankle joint, and the positioning point where the projection of the ankle joint rotation center in the sagittal plane is offset in the positive direction along the Z axis. In actual operation, it serves as the lower boundary reference point of the zipper bonding track; k is the lower reference point of the knee joint, which is the coordinate point of the projection point of the lower pole of the patella on the coronal plane offset in the negative direction along the Z axis; (z a , z k ) is the zipper bonding area, is a function of the calf cross-sectional radius, D0 is the ankle joint base diameter, and is the minimum circumscribed circle diameter of the calf anatomical cross-section at section Z = 0; K is the axial radius growth rate, and Δ is the normal offset (corresponding to a 1 cm adhesive tape), which is the constant vertical distance between the zipper tape centerline and the line connecting the center of curvature of the calf surface. The normal here refers to the direction normal to the calf skin bonded to the zipper surface. θ0 is the azimuth angle of the opening centerline. The calculation formula is as follows: ; Among them, β is the curvature correction coefficient, which can be obtained by calibration.

[0020] After obtaining the bonding track of the zipper by laser scanning, the laser scanning system 2 is controlled to move along the slide rail protrusion 104 to the edge of the cage frame 101 .

[0021] Figure 5 3 is a structural diagram of the glue applying structure provided in the embodiment of the present application. The glue applying structure 3 includes a support base 301, at least two mechanical arms 304 ( Figure 5 Three end-to-end connected robotic arms 304 are shown. Two robotic arms 304 are connected via a rotary joint, each of which has an independent motor and rotary shaft (not shown). Figure 5The first rotary joint 302 and the second rotary joint 303 are shown, which can control the two robotic arms 304 to rotate within a certain angle range.

[0022] Attached to the end of the robotic arm 304 are a glue storage box 305, a gear pump 306, and a dispensing head 307. The glue storage box 305 stores glue, while the gear pump 306 evenly pumps glue from the box. The dispensing head 307 applies glue to the skin at a set diameter. The intelligent control system 5 controls the motor in the rotary joint to adjust the movement of the dispensing head 307 along the zipper bonding path, ensuring a uniform application of glue to the calf skin surface.

[0023] In order to ensure the smooth movement of the dispensing head 307, the zipper bonding trajectory needs to satisfy the first-order continuous differentiability: ; ; The moving speed v(z) of the dispensing head 307 in the Z-axis direction is constrained as follows: ; in, is the calf cross-sectional radius function, which is used to describe the instantaneous outer radius in the calf axis direction (Z direction); and It refers to the tangent vector component of the three-dimensional trajectory curve projected on the XY plane, reflecting the horizontal rate of change of the dispensing head 307 when it moves; dz is the infinitesimal displacement along the axis of the lower leg (Z direction); It is the rate of change of the outer contour radius of the calf along the axial direction, that is, the radius change caused by height change.

[0024] The amount of glue used to bond the zipper to the dummy's calf skin also needs to be controlled. Applying too little glue will reduce the zipper's bonding effect, while applying too much glue will cause excessive glue overflow, affecting the aesthetics of the final product and wasting resources. Therefore, a calculation formula for the amount of glue applied is introduced into the gear pump 306:

[0025] Where Q is the amount of smear, ρ is the density of glue (g / mm 3 ), D is the diameter of the dispensing head 307 (mm), V is the linear velocity of the dispensing needle relative to the bonding surface after the dispensing head 307 dispenses glue (mm / s), t is the effective contact time between the dispensing head 307 and the bonding surface after the dispensing head 307 dispenses glue (s), K T is the temperature compensation coefficient (inversely proportional to the ambient temperature).

[0026] After applying glue to the zipper's bonding area (i.e., the left and right sides of the opening) on ​​the car crash dummy's calf skin, the leather strip with the zipper sewn on it (referred to as the zipper) is placed on the calf skin along the glue trace. The honeycomb array pressure rods 4 are then automatically controlled to press the zipper and keep it stationary.

[0027] Figure 6 This is a schematic diagram of the structure of the honeycomb array pressure rod provided in the embodiment of the present application. Figure 7 This is a schematic diagram of the internal structure of the pressure rod provided by an embodiment of the present application. The honeycomb array pressure rod 4 includes a plurality of pressure rods 401 arranged in a honeycomb pattern, and the pressure rods 401 are sequentially connected with a force sensor 406, a composite spring 407, a telescopic rod 408, a pressure head 409, a pressure control end 402, a second slide rail groove 403, a third screw rod 405, and a pressure rod motor 404.

[0028] Pressure head 409 is used to press and hold the zipper in place under the action of pressure control end 402. Telescopic rod 408 can be extended and retracted, compressing composite spring 407. Force sensor 406 detects the force of composite spring 407, representing the actual pressure generated by pressure rod 401. Composite spring 407 is a composite of a memory alloy and a traditional spring. Pulsing the heating current changes the elastic modulus of composite spring 407, thereby dynamically adjusting the pressure of pressure head 409.

[0029] The pressure control end 402 receives the measured pressure generated by each pressure rod 401 through the force sensor 406 and transmits the measured pressure to the intelligent control system 5. The intelligent control system 5 calculates the pressure compensation amount based on the difference between the measured pressure and the target pressure: ; Wherein, ΔPi(t) is the pressure compensation value of the i-th pressure rod 401 at time t (unit is N), is the target pressure value (set according to the process), is the measured pressure (in N) of the pressure rod 401i at time t collected by the force sensor 406, α is the proportional gain coefficient, and γ is the differential gain coefficient.

[0030] During the pressing and resting process, the force applied to the compression rod 401 may be too great or too small, requiring adjustment. The composite spring 407 within the compression rod 401 utilizes a composite structure of shape memory alloy (SMA) and a traditional spring. Pulse Width Modulation (PWM) can be used to control the heating current (0-2A) and adjust the elastic modulus.

[0031] The pressure of each pressure rod 401 is: ; ; Among them F i is the pressure of the i-th pressure head 409, k is the elastic modulus of the composite spring 407 inside the pressure rod 401, △ l is the deformation (i.e., compression displacement) of the internal composite spring 407. The composite spring 407 inside the compression rod 401 is composed of a memory alloy and a traditional spring in series. The principle formula of the equivalent stiffness of the composite spring 407 is as follows: ; ; where k eff is the equivalent stiffness, λ is the temperature influence coefficient of the memory alloy, △T is the temperature change controlled by current, k steel is the elastic stiffness of the traditional spring, k SMA is the stiffness of the memory alloy at the current temperature, It is the stiffness of the memory alloy at room temperature.

[0032] The pressure control terminal 402 receives the elastic modulus of each composite spring 407 from the intelligent control system 5 and controls the elastic modulus of the composite spring 407 accordingly. By changing the elastic modulus of the composite spring 407, the pressure of the pressure rod 401 is dynamically adjusted. Once the pressure is within an appropriate range, the system is left to stand until the zipper is fully bonded to the calf skin.

[0033] The second rail groove 403 engages with the rail protrusion 104. The platform motor 105 controls the first screw 106 to achieve horizontal movement of the honeycomb array pressure rod 4 within the cage frame 101, allowing the honeycomb array pressure rod 4 to be positioned directly above the calf skin. The pressure rod motor 404 controls the vertical movement of the honeycomb array pressure rod 4. The pressure head 409 is a hemispherical pressure head with a flexible design to prevent deformation of the dummy's calf skin when the zipper is pressed.

[0034] In summary, the intelligent control system provided in this embodiment is capable of receiving scanning data output by a laser scanning device, generating a zipper bonding trajectory, and transmitting this zipper bonding trajectory to the glue application mechanism, which then applies glue along the zipper bonding trajectory. The glue application mechanism integrates a formula for calculating the amount of glue applied, allowing it to independently control the amount of glue applied. When the honeycomb array of pressure rods presses the zipper and allows it to remain stationary, the intelligent control system receives the force of each rod and intelligently controls the elastic modulus of the composite spring within each rod, ensuring that pressure at every point in the zipper approximates and approaches the target pressure value, ensuring effective zipper bonding.

[0035] Figure 8This is a flow chart of a method for bonding a zipper on the calf of a car crash dummy, provided in an embodiment of the present application. The method utilizes the apparatus for bonding a zipper on the calf of a car crash dummy, provided in the aforementioned embodiment, and is executed by an intelligent control system. The method includes: S110, collecting scanning data of the skin of the crash dummy's calf using a laser scanning device; S120, generating a zipper bonding track according to the scanning data; S130, controlling the glue applying structure to apply glue on the skin along the zipper bonding track; S140: After glue is applied to the skin and the zipper is positioned along the glue path, control the honeycomb array pressure rods to press the zipper and allow it to remain stationary. Specifically, collect the measured pressure generated by each pressure rod in the honeycomb array; calculate a pressure compensation amount based on the difference between the measured pressure and the target pressure; calculate the elastic modulus of the composite spring based on the pressure compensation amount and the deformation of the composite spring; and control the composite spring based on the elastic modulus.

[0036] The following describes in detail a method for bonding a zipper on a car crash dummy's calf using a specific embodiment and a hybrid dummy's calf skin model: A 500mm long dummy calf skin was fixed on a calf skin fixing platform. Measurements showed that the base diameter of the calf ankle joint was 80mm, the distance between the upper and lower reference points of the ankle joint was 51mm, the distance between the upper and lower reference points of the knee joint was 81mm, the axial radius growth rate was 0.18, the opening centerline azimuth was 60°, and the curvature correction coefficient was 0.002.

[0037] The curve equation of the zipper bonding trajectory is obtained by laser scanning, where the curve equation of the zipper bonding trajectory on the left is: ; ; ; Where D0 is 80, K is 0.18, and β is 0.002. After simplification, the zipper bonding trajectory curve on the left is: ; ; ; Similarly, the bonding trajectory curve of the zipper on the right is: ; ; Among them, the bonding track of the calf zipper is at the edge of the calf opening. The zipper will be sewn on a dummy skin material with a width of 2 cm before bonding. In order to ensure the bonding effect, glue needs to be applied at a position 1 cm from the edge of the calf opening. Glue is applied on the calf skin according to the obtained zipper bonding track. The amount of glue applied should not be too much or too little. Too much glue will cause the glue to overflow when pressed and left to stand, affecting the aesthetics of the calf skin product. Too little glue will cause the calf zipper to be unstable. Therefore, it is necessary to control the uniform movement of the glue applying device on this track, and the gear pump also needs to evenly pump the glue out of the glue dispensing head. The formula for the amount of glue applied on the dummy calf skin is shown in the above embodiment.

[0038] After applying the glue, the leather strip with the zipper sewn on it is placed along the glue path. The honeycomb array pressure rod is then moved directly over the dummy's calf skin, pressing the zipper to ensure a secure bond between the skin and the zipper. To illustrate the entire process of dynamic pressure adjustment, a scenario that might occur in actual use is used as an example.

[0039] The preset target pressure is 3.5±0.5N, and the real-time detected pressure is 5.2N. At this time, the displacement of the composite spring is 1.9mm, the radius of the memory alloy is 0.6mm, the temperature influence coefficient of the memory alloy is -0.5, and the initial stiffness of the traditional spring and the memory alloy is set to 20N / mm. The pressure compensation amount is calculated using the following formula: ; ; Substituting this into the formula, we get a pressure compensation of -1.9N. Assuming the deformation of this set of composite springs is 1.9mm, the stiffness of the entire composite spring needs to be reduced by 1.

[0040] Substituting 1 into the formula for the equivalent stiffness of a composite spring yields a delta T of approximately 7.2°C. Therefore, heating the memory alloy to 7.2°C is sufficient to achieve the target spring stiffness, thereby adjusting the pressure rod force to the appropriate range. Once all pressure rods are within the appropriate pressure range, the zipper is left to fully bond to the calf skin. During this resting period, the intelligent control system dynamically adjusts the pressure of the pressure rods, ensuring that every point along the entire zipper is within the appropriate range. This effectively squeezes out air bubbles between the zipper and the calf skin without causing glue overflow, achieving optimal bonding.

[0041] This embodiment can quickly and accurately adapt to the curved calf morphology of automobile crash dummies of varying sizes. Multi-point dynamic pressure compensation technology effectively eliminates the adhesive thickness deviation caused by uneven clamping force in traditional bonding processes. The device utilizes a modular adjustment design, achieving a bonding positioning accuracy of ±0.1mm without complex equipment, significantly reducing manual error. Its operation is simple and efficient. By ensuring uniform force on the bonding surface of the calf zipper, the reliability of the simulation of the dummy leg's biomechanical characteristics is significantly improved.

[0042] In the above embodiments, all or part of the embodiments can be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired connection, such as a coaxial cable, optical fiber, digital subscriber line (DSL), or wireless connection, such as infrared, wireless, or microwave. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device, such as a server or data center, that includes one or more available media. The available medium can be a magnetic medium (e.g., a floppy disk, hard disk, or magnetic tape), an optical medium, or a semiconductor medium. It is worth noting that the computer-readable storage medium mentioned in the embodiments of the present application may be a non-volatile storage medium, in other words, a non-transitory storage medium.

[0043] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. This is not a limitation herein.

[0044] The above specific embodiments do not constitute a limitation on the scope of protection of this application. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A device for bonding zippers on the lower legs of automobile crash dummies, characterized in that: include: Calf skin fixation platform, used to fix the skin of the crash dummy's calf; A laser scanning device, used for scanning the skin and transmitting the scan data to an intelligent control system; The intelligent control system is used to generate a zipper bonding track according to the scanning data and transmit the zipper bonding track to the glue applying structure; The glue applying structure is used to apply glue on the skin along the zipper bonding track under the control of the intelligent control system; The honeycomb array pressure rod is used to press and keep the zipper stationary under the control of the intelligent control system after glue is applied to the skin and the zipper is placed along the glue path.

2. The device for bonding zippers on the lower legs of automobile crash dummies according to claim 1, characterized in that: The calf skin fixation platform includes: a cage frame, and a calf skin support rod, a support column, a slide rail protrusion and a platform motor placed in the cage frame; The calf skin support rod is located below the cage frame and is used to fix the skin of the crash dummy's calf; The support column is used to support the calf skin support rod; The slide rail protrusion is fixed above the cage frame and is used to provide a path for the movement of the laser scanning device and the honeycomb array pressure rod; The platform motor is used to control the laser scanning device and the honeycomb array pressure rod to move along the slide rail protrusion.

3. The device for bonding zippers on the lower legs of automobile collision dummies according to claim 2, characterized in that: The laser scanning device includes: a laser scanner, a second screw rod, a first slide rail groove, a slide rail motor and an intelligent control information output terminal; The laser scanner is connected to the second screw and is used to scan the skin and transmit the scan data to the intelligent control system through the intelligent control information output terminal; The first slide rail groove is engaged with the slide rail protrusion, and the slide rail motor controls the laser scanner to move on the second lead screw.

4. The device for bonding zippers on the lower legs of automobile collision dummies according to claim 3, characterized in that: The glue applying structure includes: a support base, at least two mechanical arms connected to the support base, a glue storage box connected to the end mechanical arms, a gear pump and a glue dispensing head; The glue storage box is used to store glue, the gear pump is used to control the glue to be evenly pumped out from the glue storage box, and the glue dispensing head allows the glue to be applied on the skin with a set diameter.

5. The device for bonding zippers on the lower legs of automobile crash dummies according to claim 1, characterized in that: The honeycomb array pressure rod comprises: a plurality of pressure rods arranged in a honeycomb pattern, and a force sensor, a composite spring, a telescopic rod and a pressure head, a pressure control end, a second slide rail groove, a third screw rod and a pressure rod motor connected in sequence in the pressure rod; Wherein, the pressure head is used to press the zipper to keep it stationary under the action of the pressure control end; The pressure control end receives the measured pressure generated by each pressure rod through the force sensor, transmits the measured pressure to the intelligent control system, receives the elastic modulus of each composite spring fed back by the intelligent control system, and controls the composite spring according to the elastic modulus; The second slide rail groove is engaged with the slide rail protrusion, and the slide rail motor controls the honeycomb array pressure rod to move on the second screw rod; The pressure rod motor is used to control the movement of the honeycomb array pressure rod in the vertical direction.

6. The device for bonding zippers on the lower legs of automobile crash dummies according to claim 5, characterized in that: The pressure head is a hemispherical pressure head with softness.

7. A method for bonding a zipper on the lower leg of a car crash dummy, characterized in that: The device for bonding a zipper on the calf of a car crash dummy according to any one of claims 1 to 6 is applied, wherein the method is executed by an intelligent control system and comprises: Collecting scan data of the skin of the crash dummy's lower leg using a laser scanning device; generating a zipper bonding trajectory according to the scan data; Controlling the glue applying structure to apply glue on the skin along the zipper bonding track; After the glue is applied to the skin and the zipper is placed along the glue path, the honeycomb array pressure rod is controlled to press the zipper and let it stand.

8. The method for bonding a zipper on the lower leg of a car crash dummy according to claim 7, characterized in that: The zipper bonding tracks include the track on the left side of the calf skin opening and the track on the right side of the calf skin opening: ； ； ； ； ； The ankle joint is the origin, the Z axis is along the calf axis, the X axis is in the horizontal direction and perpendicular to the calf axis, and the Y axis is in the vertical direction and perpendicular to the X and Z axes. x L ( z )and y L ( z ) are the coordinate points on the X-axis and Y-axis on the left side of the calf skin opening, x R ( z )and y R ( z ) are the coordinate points on the X-axis and Y-axis on the right side of the calf skin opening; z is the coordinate point on the Z-axis, a is the reference point on the ankle joint, z k It is the lower reference point of the knee joint; is a function of the calf cross-sectional radius, D0 is the ankle joint base diameter, K is the axial radius growth rate, △ is the normal offset, and θ0 is the opening centerline azimuth.

9. The method for bonding a zipper on the lower leg of a car crash dummy according to claim 7, characterized in that: The amount of glue applied satisfies the following formula: ； Where Q is the amount of glue applied, ρ is the density of glue, D is the diameter of the dispensing head, V is the moving speed of the dispensing head, t is the contact time between the dispensing head and the skin, K T is the temperature compensation coefficient, which is inversely proportional to the ambient temperature.

10. The method for bonding a zipper on the lower leg of a car crash dummy according to claim 7, characterized in that: Controlling the honeycomb array pressure rod to press the zipper to keep it stationary includes: collecting the measured pressure generated by each pressure rod in the honeycomb array pressure rod; Calculating a pressure compensation amount according to a difference between the measured pressure and the target pressure; Calculating the elastic modulus of the composite spring according to the pressure compensation amount and the deformation of the composite spring; The composite spring is controlled according to the elastic modulus.

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