CN-118533506-B - Chest biomechanical property simulation module simulating human rib and measurement method

CN118533506BCN 118533506 BCN118533506 BCN 118533506BCN-118533506-B

Abstract

The invention relates to the technical field of automobile testing, in particular to a chest biomechanical property simulation module imitating human ribs and a measurement method. The rib support comprises a shoulder support and a chest support, rib units are fixedly connected to the shoulder support and the chest support, the rib units comprise inner ribs, outer ribs and a displacement sensor, an inner layer base plate is arranged at the center of the inner side of the inner ribs, the outer ribs are in a semi-open annular shape, an outer layer base plate is arranged at the center of the outer side of the outer ribs, the inner layer base plate and the outer layer base plate are fixedly connected through screws, open holes are formed in central lines of the inner ribs, the outer ribs, the inner layer base plate and the outer layer base plate, one end of the displacement sensor is fixedly connected to the chest support, the other end of the displacement sensor is fixedly connected to the open holes through a pin shaft, and an arm connecting block is fixedly connected to the outer side of the rib units at the shoulder support and fixedly connected with the arm units. The scheme can more accurately simulate and evaluate the injury condition of the chest of the pedestrian in the side impact accident.

Inventors

WAN XINMING
XIAO ZHI
HU LIN
ZHANG GUANJUN
LONG YONGCHENG
WANG GUOJIE
LIU YU
ZHENG ZHI
CHANG YI
CHEN HAO
Peng Gun

Assignees

中国汽车工程研究院股份有限公司

Dates

Publication Date: 20260505
Application Date: 20240709

Claims (10)

1. A chest biomechanical performance simulation module simulating human ribs is characterized by comprising a fixing support, rib units and arm units, wherein the fixing support comprises a shoulder support and a chest support, the shoulder support and the chest support are fixedly connected with the rib units, the rib units comprise inner ring ribs, outer ring ribs and displacement sensors, the outer ring ribs are semi-open annular, an inner layer backing plate is arranged at the center of the inner side of each inner ring rib, an outer layer backing plate is arranged at the center of the outer side of each outer ring rib, the inner layer backing plate is fixedly connected with the outer layer backing plate through a screw, openings are formed in the central lines of the inner ring ribs, the outer ring ribs, the inner layer backing plates and the outer layer backing plates, one end of each displacement sensor is fixedly connected to the chest support, the other end of each displacement sensor is fixedly connected to the corresponding opening through a pin shaft, arm connecting blocks are fixedly connected to the outer sides of the rib units at the shoulder support, U-shaped clamps are fixedly connected to two sides of the arm connecting blocks through bolts, and the U-shaped clamps are fixedly connected with arm supporting pieces.
2. The rib-imitated chest biomechanical property simulation module of claim 1, wherein the chest support is fixedly connected with a transmitting frame, and the center of the transmitting frame is consistent with the height of the center of gravity of the chest impactor.
3. The rib-like thoracic biomechanical performance simulation module of claim 2, wherein the thoracic support is formed by connecting two side plates using a support shaft with internal threads and screws.
4. The chest biomechanical performance simulation module of the humanoid rib according to claim 1, wherein two ends of the inner ring rib and the outer ring rib are fixed on the chest support through screws, the outer sides of the inner ring rib and the outer ring rib are in contact with the chest support, and screw heads are positioned on the inner sides of the inner ring rib or the outer ring rib.
5. The human rib-like chest biomechanical performance simulation module according to claim 4, wherein the chest support is fixedly connected with a plurality of rib units, the height of each rib unit is 40mm, and the gap between each rib unit is 16mm.
6. The chest biomechanical performance simulation module of a humanoid rib according to claim 1, 4 or 5, wherein the inner side of the inner ring rib is bonded with damping material through adhesive, and the outer side of the outer ring rib is bonded with outer rubber.
7. The chest biomechanical performance simulation module of the humanoid rib according to claim 1, wherein chest foam is adhered to the outer side of a rib unit at a chest bracket, and the outer side of the foam is covered with a layer of rubber.
8. The rib-like chest biomechanical performance simulation module of claim 7, wherein the arm support piece is covered with arm foam, and the arm foam is internally provided with arm support piece-shaped open pores, so that the arm foam can be covered on the surface of the arm support piece through gluing.
9. The rib-imitated chest biomechanical property simulation module of claim 8, wherein the arm support piece is made of steel sheet.
10. A method for measuring the biomechanical properties of human chest with human-like ribs is characterized in that the chest biomechanical property simulation module with human-like ribs as set forth in any one of claims 1-9 is used to obtain the compression of side impact chest by measuring the length change and deflection angle of the sleeve of the displacement sensor The formula is as follows: In the formula, For the sensor hinge point spacing, Is that The hinge point spacing of the time sensor, Is that The hinge point spacing of the time sensor; at the distance of the hinge points of the sensor The projection in the axial direction is provided, Is that The hinge point distance of the time sensor is equal to The projection in the axial direction is provided, Is that The hinge point distance of the time sensor is equal to Projection in the axial direction; As the angle between the axis of the sensor and the Y axis, Is that The angle of the moment of time is set, Is that The time angle; is the amount of lateral compression of the impactor.

Description

Chest biomechanical property simulation module simulating human rib and measurement method Technical Field The invention relates to the technical field of automobile testing, in particular to a chest biomechanical property simulation module imitating human ribs and a measurement method. Background In various traffic accidents, the chest of a pedestrian becomes a very vulnerable part due to the unique physiological structure and position, and particularly, the chest injury risk is remarkably increased in side impact accidents possibly suffered by the pedestrian when crossing a road. Accident statistics data and simulation experiments clearly indicate that the chest of a pedestrian is more prone to cause serious injury under side impact than front impact, and the high disability rate of the chest of the pedestrian forms a direct and serious threat to the life safety of the pedestrian. However, in the current pedestrian protection evaluation system, the evaluation of the chest protection effect of the pedestrian appears to be relatively weak. Specifically, there are several technical problems to be solved: 1. At present, a set of systematic evaluation method for accurately measuring the protection effect of different vehicle types on the chest of pedestrians in an accident is not established. This results in a lack of scientific evidence and effective guidance in vehicle design and pedestrian protection policy control. 2. The existing pedestrian chest simulation device has obvious differences in structure and materials with the human real rib structure, and high-biological fidelity simulation is difficult to realize in an impact experiment. This discrepancy not only limits the accuracy and reliability of the impactor in assessing pedestrian chest safety performance, but also hampers the development of related studies. 3. The side impact simulation is insufficient, and the pedestrian chest simulation device and the evaluation method are mostly focused on the front or specific angle impact simulation, but the simulation of the side impact high-risk scene is insufficient. This results in the presence of significant voids and stubs when evaluating the vehicle's side protection against the pedestrian's chest. Therefore, in order to solve the above-mentioned problems, it is needed to develop a novel and efficient human chest biomechanical performance simulation module and measurement method for simulating human ribs. Disclosure of Invention The invention aims at: the technical scheme can accurately simulate the damage condition of the human chest in a side impact accident. In order to achieve the above object, according to a first aspect, an embodiment of the present disclosure provides a chest biomechanical performance simulation module simulating human ribs, including a fixing support, rib units and arm units, wherein the fixing support includes a shoulder support and a chest support, the shoulder support and the chest support are both fixedly connected with the rib units, the rib units include an inner ring rib, an outer ring rib and a displacement sensor, the outer ring rib is in a half-open annular shape, an inner layer backing plate is arranged in the center of the inner side of the inner ring rib, an outer layer backing plate is arranged in the center of the outer side of the outer ring rib, the inner layer backing plate and the outer layer backing plate are fixedly connected through screws, openings are formed in the center lines of the inner ring rib, the outer ring rib, the inner layer backing plate and the outer layer backing plate, one end of the displacement sensor is fixedly connected to the chest support, the other end of the displacement sensor is fixedly connected to the opening through a pin shaft, the outer side of the rib units at the shoulder support is fixedly connected with arm connecting blocks, the arm connecting blocks are fixedly connected with U-shaped clamps, the U-shaped clamps are fixedly connected to the two sides of the arm connecting blocks through bolts, and the U-shaped clamps are fixedly connected with arm supporting pieces. The basic scheme has the beneficial effects that the simulation module in the scheme can simulate the chest response of the pedestrian when the side face of the pedestrian is impacted, consider the protection of the vehicle to the chest safety of the pedestrian, not only improve the pedestrian safety assessment index of the vehicle type, provide a guiding scheme for the appearance of the vehicle in the vehicle development process, but also reduce the damage of the pedestrian in the accident and reduce the casualty rate of the traffic accident. Because the injury of the vehicle to the chest of the pedestrian does not generally relate to the non-impact side in the side collision accident of the pedestrian-vehicle, the simulation module in the scheme only simulates the half-chest structure of the pedestrian, and the requirements on the impactor launching device