Human rib-simulated human chest biomechanical property simulation module
By designing a human chest biomechanical performance simulation module that imitates human ribs, the problem of difficulty in accurately simulating the side impact damage of pedestrian chests in accidents in the prior art is solved, and more accurate chest injury simulation and vehicle safety assessment are achieved, reducing the casualty rate in traffic accidents.
Patent Information
- Application Number
- CN202421614864.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The prior art lacks effective methods to simulate and evaluate the damage of pedestrian chests during side impacts in accidents, making it difficult for vehicle design and pedestrian protection strategies to accurately evaluate chest safety performance.
A human chest biomechanical performance simulation module that imitates human ribs is designed, including a fixing bracket, a rib unit and an arm unit. By simulating the pedestrian semi-thoracic structure and arm state, the displacement sensor is used to measure the displacement and deformation of the ribs, and then the chest injury is evaluated.
This simulation module can more accurately simulate the damage of pedestrian chests in side impact accidents, improve the accuracy and reliability of the assessment of vehicle safety protection of pedestrian chests, reduce pedestrian damage in accidents, and reduce the casualty rate of traffic accidents.
Smart Images
Figure CN222837827U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biomechanical performance simulation, in particular to a biomechanical performance simulation module of a human chest which imitates human ribs. Background Art
[0002] As road traffic becomes increasingly busy, pedestrian safety has become a key issue of social concern. Among them, pedestrian chests have attracted extensive attention and research due to their vulnerability to injury in accidents, especially when pedestrians are hit from the side while crossing the road. Accident statistics and simulation experiments show that side impacts on pedestrian chests are more likely to cause serious injuries and a higher disability rate than frontal impacts, which poses a serious threat to pedestrian life safety.
[0003] However, in the existing pedestrian protection evaluation procedures, the evaluation of pedestrian chest protection has not received enough attention. At present, there is a lack of evaluation methods for the pedestrian chest protection effects of different vehicle models in accidents, and there is also a lack of impactors that can effectively simulate pedestrian chest injuries. This makes it difficult to accurately evaluate the protective effect of vehicles on pedestrian chest safety when designing vehicles and formulating pedestrian protection strategies.
[0004] Research on chest biomechanical performance simulation modules at home and abroad is still in its early stages, and there are no mature physical results that can be applied to actual evaluations. The structure of the chest biomechanical performance simulation modules used in published studies is significantly different from the real human rib structure, resulting in poor biofidelity in impact experiments and difficulty in accurately simulating the damage to pedestrian chests in accidents. Therefore, the accuracy and reliability of these impactors are severely limited when evaluating the safety performance of pedestrian chests. Utility Model Content
[0005] The utility model aims to provide a human chest biomechanical performance simulation module that simulates human ribs. The technical solution can more accurately simulate the damage to the pedestrian's chest in a side impact accident.
[0006] To achieve the above-mentioned purpose, the utility model provides a basic solution: a human chest biomechanical performance simulation module that imitates human ribs, comprising a fixed bracket, a rib unit and an arm unit; the fixed bracket comprises a shoulder bracket and a chest bracket, and the shoulder bracket and the chest bracket are both fixedly connected with the rib unit; the rib unit comprises an inner circle rib, an outer circle rib and a displacement sensor, an inner pad is arranged at the center of the inner side of the inner circle rib, an outer pad is arranged at the center of the outer side of the outer circle rib, and the inner pad and the outer pad are fixedly connected by a plurality of screws; openings are arranged on the center lines of the inner circle rib, the outer circle rib and the inner pad and the outer pad, one end of the displacement sensor is fixedly connected to the chest bracket, and the other end is fixed in the opening by a pin shaft; an arm connecting block is fixedly connected to the outer side of the rib unit at the shoulder, and the arm connecting block is fixedly connected to an arm supporting sheet, and the arm supporting sheet is covered with arm foam.
[0007] Principles and beneficial effects of the basic solution: The existing technology generally only considers the head and lower limbs in the evaluation of pedestrian safety performance of vehicles, and rarely evaluates the chest, which has a high injury rate and serious injuries. The simulation module in this solution can simulate the chest response of pedestrians and consider the protection of the chest safety of pedestrians by vehicles. It can not only improve the pedestrian safety assessment indicators of vehicle models, provide guidance for vehicle appearance during vehicle development, but also reduce the damage suffered by pedestrians in accidents and reduce the casualty rate of traffic accidents.
[0008] Since the injury caused by the vehicle to the pedestrian's chest in a pedestrian-vehicle side collision accident generally does not involve the non-impact side, the simulation module in this scheme only simulates the pedestrian's half-thorax structure, which simplifies the structure and reduces the weight while reducing the requirements for the impactor launcher. Through modular design, including independently replaceable or adjustable parts such as fixed brackets, rib units and arm units, it is not only convenient to customize the configuration according to specific experimental needs, but also improves the versatility and reusability of the module, reducing experimental costs and time.
[0009] The rib unit of the simulation module includes inner and outer ribs, supplemented by the structure of inner and outer pads, which can highly simulate the complex anatomical structure and biomechanical properties of the human chest. The inner ribs highly restore the arc shape of the human ribs, and the semi-open ring shape of the outer ribs is similar to the human chest contour, allowing the module to move in the lateral, front-to-back, and up-and-down directions, which helps to more accurately simulate the actual movement of the pedestrian's ribs in an accident. The pedestrian's arm is simulated through the arm unit to evaluate the impact of the arm state on chest injuries during side impacts.
[0010] The design of the inner pad and the outer pad ensures that the movement states of the inner and outer ribs remain consistent during the test. The deformation of the simulated module caused by the impact can be measured more directly and effectively by the displacement sensor, ensuring the accuracy of the side impact test results.
[0011] As an implementable preferred solution, the chest support is fixedly connected to a launch frame, and the center of the launch frame is kept consistent in height with the center of gravity of the chest biomechanical performance simulation module.
[0012] As an implementable preferred solution, the chest support is formed by connecting two side plates using a support shaft with internal threads and screws.
[0013] As an implementable preferred solution, both ends of the inner circle ribs and the outer circle ribs are fixed to the chest support with screws, the outer sides of the inner circle ribs and the outer circle ribs are in contact with the chest support, and the screw heads are located on the inner side of the inner circle ribs or the outer circle ribs.
[0014] As an implementable preferred solution, a chest support is fixedly connected with a plurality of rib units, a single rib unit has a height of 40 mm, and a gap between the rib units is 16 mm.
[0015] As an implementable preferred solution, the inner side of the inner ring rib is bonded with the damping material by means of an adhesive; and the outer side of the outer ring rib is bonded with the outer layer of rubber.
[0016] As an implementable preferred solution, chest foam is bonded to the outer side of the rib unit at the chest support, and the outer side of the chest foam is covered with a layer of rubber.
[0017] As an implementable preferred solution, the arm unit includes an arm supporting piece, which is covered with arm foam, and the arm foam has openings in the shape of the arm supporting piece, so that the arm foam can be covered on the surface of the arm supporting piece by gluing.
[0018] As an implementable preferred solution, the arm connecting block is fixedly connected with a U-shaped clamp, and the U-shaped clamp is fixed to both sides of the arm connecting block by bolts, and the U-shaped clamp is fixedly connected to the arm supporting plate.
[0019] As an implementable preferred solution, the arm support plate is made of a steel plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The present invention is a structural schematic diagram of a fixing bracket of a biomechanical performance simulation module of a human chest that imitates human ribs.
[0021] Figure 2 The present invention is a structural schematic diagram of a rib unit of a human thorax biomechanical performance simulation module that imitates human ribs.
[0022] Figure 3 The present invention is a schematic diagram of the structure of a biomechanical performance simulation module of the human chest that imitates human ribs.
[0023] Figure 4 It is a side view of a biomechanical performance simulation module of the human chest that imitates human ribs.
[0024] Figure 5 The present invention is a schematic diagram of the deformation of the rib unit of a human chest biomechanical performance simulation module that imitates human ribs.
[0025] Figure 6 It is a top view of a biomechanical performance simulation module of the human chest that imitates human ribs.
[0026] Figure 7 The present invention is a schematic diagram of the structural parameters of a displacement sensor of a biomechanical performance simulation module of the human chest that imitates human ribs. DETAILED DESCRIPTION
[0027] The technical solution of this application is further described in detail below through specific implementation methods:
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection (including various mechanical connection forms, such as couplings or gear pairs, etc.), or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] Figure numerals: shoulder support 1, chest support 2, support shaft 3, side panel 4, launching frame 5, mounting plate 6, rubber 7, chest foam 8, arm foam 9, arm support plate 10, locking nut 11, U-shaped clamp 12, arm connecting block 13, damping material 14, inner circle rib 15, outer circle rib 16, outer layer rubber 17, inner layer pad 18, pin shaft 19, outer layer pad 20, displacement sensor 21.
[0030] Embodiment 1
[0031] A human chest biomechanical performance simulation module imitating human ribs comprises a fixing bracket, a rib unit and an arm unit.
[0032] Reference Figure 1The fixed bracket includes a shoulder bracket 1 and a chest bracket 2. The chest bracket 2 is formed by connecting two side panels 4 using a support shaft 3 with an internal thread and screws; the chest bracket 2 is fixedly connected to a launching frame 5, the center of the launching frame 5 is consistent with the height of the center of gravity of the chest biomechanical performance simulation module, the launching frame 5 is connected to the launching device through a pin shaft, and torque loading can be set in the launching frame and the pin shaft.
[0033] The shoulder support 1 is fixedly connected with a rib unit for simulating the mechanical properties of the shoulder, and the chest support is fixedly connected with a plurality of rib units for simulating the mechanical properties of the chest. In this embodiment, one rib unit is provided at the shoulder, and three rib units are provided at the chest. The structure of the rib unit at the shoulder support is similar to that of the rib unit at the chest support. The outer ring ribs of the rib unit at the shoulder support are slightly smaller in the front-to-back direction than the outer ring ribs of the rib unit at the chest support, which corresponds to the slightly smaller size of the upper ribs of the human body.
[0034] The overall thickness of the module is 218mm and the width is 149mm. The height of a single rib unit of the rib unit group at the chest support is 40mm, and the gap between the rib units is 16mm. From an ergonomic point of view, a person's height is closely related to the center of gravity, moment of inertia, rotation radius, etc. The above parameter settings make the human chest biomechanical performance simulation module close to the pedestrian's body size, thereby avoiding the chest compression value that characterizes chest injury from deviating far from the pedestrian, so that the data obtained by this module can represent the degree of injury to the crowd in the event of a side collision. The device can also adjust the rib spacing according to the anatomical structure of the human chest at different percentiles to achieve chest height adaptation to different percentiles of the human body.
[0035] Reference Figure 2 Each rib unit includes an inner ring rib 15, an outer ring rib 16 and a displacement sensor 21. In this embodiment, a 2D IR-TRACC displacement sensor is used. The inner side of the inner ring rib 15 is bonded with a damping material 14 by an adhesive; the damping material 14 is used to absorb a certain impact energy and reduce rebound; the outer side of the outer ring rib 16 is bonded with an outer layer rubber 17, and the outer layer rubber 17 has a certain buffering effect on the inner and outer ring ribs to avoid direct contact between the inner and outer ring ribs; an inner layer pad 18 is arranged at the center of the inner side of the inner ring rib 15, and an outer layer pad 20 is arranged at the center of the outer side of the outer ring rib 16. The inner layer pad 18 and the outer layer pad 20 are fixedly connected by a number of screws. In this embodiment, the screws pass through the outer layer pad 20, the outer ring rib 16, the inner ring rib and the inner layer pad 18 in sequence, so as to ensure that the movement state of the components on the impact side is consistent. There are openings on the center lines of the inner ring rib 15, the outer ring rib 16, the inner layer pad 18, and the outer layer pad 20. One end of the displacement sensor 21 is fixedly connected to the chest support 2, and the other end (the end of the circular ring) is fixed in the opening through a pin 19.
[0036] Reference Figure 4 The chest foam 8 is bonded to the outside of the rib unit at the chest support. The outside of the foam is covered with a layer of rubber 7 for simulating skin. The two ends of the rubber are pressed and fixed on the support 2 through the mounting plate 6.
[0037] The two ends of the inner circle ribs 15 and the outer circle ribs 16 are fixed to the chest support 2 with screws, the outer sides of the inner circle ribs 15 and the outer circle ribs 16 are in contact with the chest support 2, and the screw heads are located on the inner side of the inner circle ribs 15 or the outer circle ribs 16. In this technical solution, the inner circle ribs highly restore the arc shape of the human ribs, and the semi-open ring shape of the outer circle ribs is similar to the human chest contour, so that the ribs can not only move laterally, but also move in the front-to-back and up-and-down directions, which better simulates the response of the pedestrian ribs in an accident.
[0038] Reference Figure 3 The outer side of the rib unit at the shoulder support is fixedly connected with an arm connection block 13, and the arm connection block 13 is fixedly connected with a U-shaped clamp 12. The U-shaped clamp 12 is fixedly connected to both sides of the arm connection block 13 by bolts, and the U-shaped clamp 12 is fixedly connected to the arm support sheet 10 by a locking nut 11. The arm support sheet 10 is preferably made of a steel sheet. There is an opening in the shape of the arm support sheet 10 in the arm foam 9, so that the arm foam 9 can be covered on the surface of the arm support sheet 10 by gluing; the U-shaped clamp 12 can rotate around the arm connection block 13 at a certain angle, thereby simulating different lifting angles and positions of the arm. During a pedestrian-vehicle collision, different movement states of the arm will affect the severity of the chest injury. If the arm is located between the chest and the hood, the chest injury will be aggravated. This technical solution simulates the arm by the arm unit, and can evaluate the damage to the chest under the most serious working conditions. The U-shaped clamp 12 is used to allow the arm to rotate laterally, so that the force on the arm can be better transferred to the chest during a side impact; the arm support plate and the U-shaped clamp 12 are fixed with a locking nut, so that the arm angle of the arm unit remains stable during the test, but the arm angle can be adjusted as needed in different test conditions. By simulating different positions of the arm between the chest and the hood, the damage to the chest under the most severe conditions can be evaluated, providing an important reference for improving vehicle safety design.
[0039] Before using the chest biomechanical performance simulation module, it is necessary to calibrate it. Fix the impactor on the calibration test bench and use a standard calibration hammer to impact the four rib units in this embodiment. Figure 5 As shown in the figure (disp represents displacement, time represents time), if the maximum deformation of the rib unit is within the calibration range, the calibration is passed.
[0040] Embodiment 2
[0041] The technical feature that distinguishes this embodiment from the first embodiment is that a method for measuring the biomechanical properties of the human chest that simulates human ribs is provided, and chest compression is used to evaluate human chest injuries.
[0042] Reference Figure 6 , by measuring the change in the length of the sleeve of the displacement sensor 21 and the deflection angle, the compression amount of the side chest is obtained, and the formula is as follows:
[0043]
[0044] In the formula, is the distance between the sensor hinge points, for The distance between the hinge points of the sensors at the moment, for The distance between the hinge points of the sensors at all times; The distance between the sensor hinge points is The projection in the axial direction, for The distance between the hinge points of the sensors at the moment The projection in the axial direction, for The distance between the hinge points of the sensors at the moment Axis projection; is the angle between the sensor axis and the Y axis, for The moment angle, for Moment angle; is the lateral compression of the impactor.
[0045] The above contents are only embodiments of the utility model. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.
Claims
1. A human chest biomechanical performance simulation module that simulates human ribs, characterized by: It includes a fixed bracket, a rib unit and an arm unit; the fixed bracket includes a shoulder bracket and a chest bracket, and the shoulder bracket and the chest bracket are both fixedly connected with the rib unit; the rib unit includes an inner circle rib, an outer circle rib and a displacement sensor, an inner pad is arranged at the center of the inner side of the inner circle rib, an outer pad is arranged at the center of the outer side of the outer circle rib, and the inner pad and the outer pad are fixedly connected by a number of screws; openings are arranged on the center lines of the inner circle rib, the outer circle rib and the inner pad and the outer pad, one end of the displacement sensor is fixedly connected to the chest bracket, and the other end is fixed in the opening by a pin shaft; an arm connecting block is fixedly connected to the outer side of the rib unit at the shoulder, the arm connecting block is fixedly connected to an arm supporting sheet, and the arm supporting sheet is covered with arm foam.
2. The human chest biomechanical performance simulation module imitating human ribs according to claim 1, characterized in that: The chest support is fixedly connected with a launching frame, and the center of the launching frame is kept consistent with the height of the center of gravity of the chest biomechanical performance simulation module.
3. The human chest biomechanical performance simulation module imitating human ribs according to claim 2, characterized in that: The chest support is made by connecting two side plates using a support shaft with internal threads and screws.
4. The human chest biomechanical performance simulation module imitating human ribs according to claim 1, characterized in that: Both ends of the inner circle rib and the outer circle rib are fixed to the chest support by screws, the outer sides of the inner circle rib and the outer circle rib are in contact with the chest support, and the screw heads are located on the inner sides of the inner circle rib or the outer circle rib.
5. The human chest biomechanical performance simulation module imitating human ribs according to claim 4, characterized in that: The chest support is fixedly connected with a plurality of rib units, the height of a single rib unit is 40 mm, and the gap between the rib units is 16 mm.
6. A human chest biomechanical performance simulation module imitating human ribs according to claim 1, 4 or 5, characterized in that: The inner side of the inner ring rib is bonded with a damping material through an adhesive; the outer side of the outer ring rib is bonded with an outer layer of rubber.
7. The human chest biomechanical performance simulation module imitating human ribs according to claim 1, characterized in that: The outer side of the rib unit at the chest support is bonded with chest foam, and the outer side of the chest foam is covered with a layer of rubber.
8. The human chest biomechanical performance simulation module imitating human ribs according to claim 1, characterized in that: The arm unit comprises an arm supporting sheet, the arm supporting sheet is covered with arm foam, and the arm foam has openings in the shape of the arm supporting sheet, so that the arm foam can be covered on the surface of the arm supporting sheet by gluing.
9. The human chest biomechanical performance simulation module imitating human ribs according to claim 8, characterized in that: The arm connecting block is fixedly connected with a U-shaped clamp, and the U-shaped clamp is fixed to both sides of the arm connecting block by bolts, and the U-shaped clamp is fixedly connected to the arm supporting piece.
10. The human chest biomechanical performance simulation module imitating human ribs according to claim 9, characterized in that: The arm supporting piece is made of steel sheet.