CN117309244B - Human chest impact module counterweight method, system and storage medium - Google Patents
Human chest impact module counterweight method, system and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 210000000056 organ Anatomy 0.000 claims description 28
- 238000000418 atomic force spectrum Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000009863 impact test Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 210000001015 abdomen Anatomy 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
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- 239000006260 foam Substances 0.000 description 3
- 230000037237 body shape Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
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- 230000001360 synchronised effect Effects 0.000 description 2
- 206010061386 Chest injury Diseases 0.000 description 1
- 208000029224 Thoracic injury Diseases 0.000 description 1
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- 230000001070 adhesive effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating imbalance
- G01M1/32—Compensating imbalance by adding material to the body to be tested, e.g. by correcting-weights
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/12—Static balancing; Determining position of centre of gravity
- G01M1/122—Determining position of centre of gravity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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Abstract
The invention relates to the field of automobile collision safety, in particular to a human chest impact module counterweight method, a system and a storage medium. The system applies the method, which includes S100, adjusting the centroid of the impact module; s200, placing the human body model in a space rectangular coordinate system, and dividing the human body model into a human body upper part, a chest body section and a human body lower part; a rotating shaft is arranged for calculating the moment of inertia, passes through the mass center of the chest body section and is parallel to the coronal axis of the human body; s300, arranging an upper balancing weight above the impact module for simulating the weight of the upper part of a human body and calculating the mass of the upper balancing weight; s400, arranging a lower balancing weight below the impact module for simulating the weight of the lower part of the human body and calculating the mass of the lower balancing weight; s500, installing a balancing weight; s600, verifying whether the weight of the balancing weight is accurate. According to the technical scheme, the human body impact module can better simulate the weight distribution of the body under the real condition, and the influence on the human body when the vehicle collides can be simulated more truly.
Description
Technical Field
The invention relates to the field of automobile collision safety, in particular to a human chest impact module counterweight method, a system and a storage medium.
Background
In the automobile crash test, a human chest impact module is used to simulate the impact of a human chest. The invention CN109141925A discloses a simple dummy chest simulation device used in an automobile front collision test, which comprises a chest skeleton and intervertebral discs arranged between the rear parts of the chest skeleton, wherein the chest skeleton consists of a plurality of simulated ribs, and the intervertebral discs are deformed by compressing the intervertebral discs through impacting the front surfaces of the chest skeleton.
When a human body is collided with a car, the weight distribution of the body can influence the deformation of the chest. If the dummy does not carry out correct counterweight, the weight and distribution of the human body cannot be truly simulated, the motion trail and impact force transmission after collision of the dummy are greatly different from those of the real person, and the impact and damage degree of the chest cannot be accurately simulated, so that the experimental result is inaccurate. In addition, the false weight can cause instability of the dummy model in the collision process, and further influence the reliability of the experimental result.
Disclosure of Invention
The invention aims at: the technical scheme can enable the human body impact module to better simulate the weight distribution of the body under the real condition and simulate the influence on the human body when the vehicle collides more truly, so that the vehicle collision test data is more approximate to reality, and the safety performance of the vehicle is further accurately evaluated.
To achieve the above object, in a first aspect, an embodiment of the present disclosure provides a method for weighting a chest impact module of a human body, including:
Step S100, adjusting the mass center C Impact module of the impact module, wherein the mass center C Impact module is positioned at the center of each symmetry plane of the rib at the middle of the impact module on the symmetry plane, and the mass center C Impact module is positioned at the rear part of the rib on the asymmetric plane;
step 200, placing the human body model in a space rectangular coordinate system and dividing the human body model into a human body upper part, a chest body section and a human body lower part; a rotating shaft is arranged for calculating the moment of inertia, passes through the centroid C Chest of the chest body section and is parallel to the coronal axis of the human body;
Step S300, arranging an upper balancing weight above the impact module for simulating the weight of the upper part of the human body, calculating the rotational inertia I Upper part of the upper part of the human body, and obtaining the mass m Upper part of the upper balancing weight according to the rotational inertia I Upper part ;
step S400, arranging a lower balancing weight below the impact module for simulating the weight of the lower part of the human body, calculating the moment of inertia I Lower part(s) of the lower part of the human body, and obtaining the mass m Lower part(s) of the lower balancing weight according to the moment of inertia I Lower part(s) ;
Step S500, installing the balancing weights according to the upper balancing weight mass m Upper part and the lower balancing weight mass m Lower part(s) ;
step S600, verifying whether the quality of the upper balancing weight and the lower balancing weight is accurate.
The basic scheme has the beneficial effects that: step 100, the mass center of the human body impact module is located at the center and at the back, so that the human body impact module can be better kept stable when being impacted in an experiment, and the reliability of an experiment result is ensured; step S200 can more accurately represent the position of the mass center, and meanwhile, the body is divided, so that the moment of inertia can be calculated in the subsequent steps conveniently, and the counter weight of each body segment is calculated; step S300-step S500 can accurately calculate the mass of the upper balancing weight and the lower balancing weight, and install the upper balancing weight and the lower balancing weight on the impact module, simulate the weight distribution of the body under the real condition, simulate the influence on the human body when the vehicle collides more truly, and therefore enable the vehicle collision test data to be more approximate to reality, and step S600 can verify the mass of the installed balancing weights, and further improve the accuracy of the vehicle collision test result.
Preferably, in the step S300, a calculation formula of the moment of inertia I Upper part is:
wherein r i is the vertical distance from each organ and tissue in the chest body segment to the rotating shaft; m i is the mass of each organ and tissue in the chest body segment, and r n is the vertical distance from each organ and tissue in the phantom of the lower part of the human body to the rotation axis of the chest body segment; m n is the mass of each organ and tissue in the phantom removed from the lower part of the human body.
In the step S300, the calculation formula of the mass m Upper part of the upper balancing weight is as follows:
wherein Z C Upper part is the Z-axis coordinate of the mass center of the upper balancing weight; z C Impact module is the Z-axis coordinate of the mass center of the impact module.
In the preferred embodiment, in the step S400, a calculation formula of the mass m Lower part(s) of the lower balancing weight is:
Wherein r k is the vertical distance from each organ and tissue of the human body model on the upper part of the human body to the rotating shaft of the chest body section; m k is the mass of each organ and tissue of the human body model of the upper part of the human body; r i is the vertical distance from each organ and tissue of the chest body segment to the rotation axis of the chest body segment; m i is the mass of each organ and tissue of the chest body segment; z C Lower part(s) is the Z-axis coordinate of the mass center of the lower balancing weight; z C Impact module is the Z-axis coordinate of the mass center of the impact module.
Preferably, the step S600 includes:
Step S601, pendulum impact test is carried out on the human chest impact module provided with the upper balancing weight and the lower balancing weight by using dummy calibration equipment,
And step S602, comparing the pendulum force curve obtained through the pendulum impact test with a specified pendulum force limit curve, and if the pendulum force curve is in the range of the pendulum force limit channel, accurately weighing the balancing weight.
In a second aspect, an embodiment of the present disclosure provides a human chest impact module weighting system, which uses the above-mentioned human chest impact module weighting method.
In a third aspect, embodiments of the present disclosure provide a storage medium having a computer program stored therein, which when executed by a processor, enables the above-described method for weighting a human chest impact module.
Drawings
FIG. 1 is a logic diagram of a method of weighting a chest impact module of a person;
FIG. 2 is a schematic side view of a mannequin according to one embodiment;
FIG. 3 is a block diagram of a chest impact module of a human body after installing a balancing weight according to an embodiment;
FIG. 4 is a side view of a human chest impact module after a weight is installed according to an embodiment;
FIG. 5 is a graphical representation of a comparison of the specified pendulum force limit of the ISO/TR 9790 document with an actual measured pendulum force curve;
FIG. 6 is a block diagram of a chest impact module of a human body;
FIG. 7 is a top view of a rib module and a damping module;
FIG. 8 is a cross-sectional view taken at A-A of FIG. 7;
FIG. 9 is a cross-sectional view taken at B-B of FIG. 7;
FIG. 10 is a schematic diagram of a third embodiment;
Fig. 11 is a schematic diagram illustrating the operation of the three-range sensor according to the third embodiment.
Detailed Description
The following is a further detailed description of the embodiments:
The labels in the drawings of this specification include: the upper body 11, the chest body section 12, the rotation shaft 13, the lower body 14, the upper weight 21, the lower weight 22, the guide rail 31, the first through hole 311, the ventilation hole 312, the anti-collision block 313, the slide rail 32, the second through hole 321, the damper 33, the third through hole 331, the first spring 34, the second spring 35, the piston 36, the connecting rod 37, the stopper 38, the screw 39, the distance measuring sensor 40, the guide rail fixing plate 51, the connecting plate 52, the rib fixing plate 53, the rib 61, the skin foam 62.
In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "upper", "lower", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that the terms "disposed," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined and limited. For example, the connection can be fixed connection, detachable connection or integrated connection; the mechanical connection (including various mechanical connection forms such as a coupling or a gear pair and the like) and the electrical connection can be realized; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1, a method for weighting a chest impact module of a human body includes:
In step S100, the centroid C Impact module of the impact module is located at the center of each symmetry plane (up, down, left and right) of the middle rib of the impact module, and on the asymmetric plane (front and rear), the centroid C Impact module should be located at the rear of the rib, in this embodiment, at the rib fixing plate 53.
And step S200, placing the Chinese 50 percentile human model in a space rectangular coordinate system. The Chinese 50 percentile human model is a human model for researching the body shape characteristics of Chinese crowd, and can reflect the body shape and the structure characteristics of Chinese crowd based on the body characteristics of Chinese crowd.
The phantom is divided into an upper body portion 11, a chest body section 12 and a lower body portion 14 using a plane perpendicular to the standing surface of the pedestrian from the upper tangent point of the first rib to the lower tangent point of the tenth rib, and a phantom side view diagram is obtained with reference to fig. 2. And a rotating shaft 13 is arranged for calculating the moment of inertia, and passes through the centroid C Chest of the chest body section 12 and is parallel to the coronal axis of the human body. The coronal axis of the human body refers to the axis that extends horizontally parallel to the horizontal plane and perpendicular to the sagittal plane.
In step S300, an upper counterweight 21 is disposed above the chest impact module, and the upper counterweight 21 is used for simulating the mass m Upper part and the moment of inertia I Upper part of the upper portion 11 (head, neck and arm) of the human body, and is connected with the impact module through screws. The mass m Upper part of the upper balancing weight 21 to be installed is calculated, and the specific steps are as follows:
Step S301, removing the upper part 11 (head, neck and arms) and the lower part 14 (abdomen and legs), splitting the chest body segment 12 model, and calculating the position of the centroid C Chest of the chest body segment 12, wherein the calculation formula is as follows:
Where r C Chest denotes the sagittal diameter of the chest centroid relative to the origin of coordinates; m i is the mass of each organ and tissue of the chest body segment 12; p i denotes the sagittal diameter of each organ and tissue of the chest body segment 12 relative to the origin of coordinates; m is the total mass of the chest body segment 12, 。
Step S302, the lower body part 14 (abdomen and legs) in the chinese 50-percentile mannequin is removed, resulting in a mannequin comprising the chest body part 12 and the upper body part 11 (head, neck and arms). The moment of inertia I Chest and I Without the lower part of the chest body segment 12 model and the model of the removed human lower portion 14 model relative to the centroid C Chest of the chest body segment 12 are calculated respectively as follows:
Wherein r i is the vertical distance from each organ and tissue of the chest body segment 12 to the rotating shaft 13 of the chest body segment 12; m i is the mass of the various organs and tissues of the chest body segment 12.
Wherein r n is the vertical distance from each organ and tissue of the human body model of the lower part 14 (abdomen and leg) of the human body to the rotating shaft 13 of the chest body segment 12; m n is the mass of the various organs and tissues of the manikin from which the lower portion 14 (abdomen and legs) of the human body is removed.
Step S303, calculating the moment of inertia I Upper part of the upper portion 11 (head, neck and arm), i.e
The upper weight 21 is a regular cube, and the centroid position C Upper part of the upper weight 21 is easily obtained
Wherein L Upper part is the distance between the mass center C Upper part of the upper balancing weight 21 and the mass center C Impact module of the impact module; z C Upper part is the Z-axis coordinate of the mass center of the upper balancing weight 21; z C Impact module is the Z-axis coordinate of the mass center of the impact module.
The chest centroid C Chest and upper counterweight mass m Upper part are formulated as follows:
In step S400, a lower counterweight 22 is disposed below the chest impact module, and the lower counterweight 22 is used for simulating the mass m Lower part(s) and the moment of inertia I Lower part(s) of the lower portion 14 (abdomen and leg) of the human body, and is connected to the impact module by screws. The mass m Lower part(s) of the lower counterweight 22 to be mounted is calculated, and similarly, similar to step S300, the following calculation formula can be obtained:
Where r C Chest denotes the sagittal diameter of the chest centroid relative to the origin of coordinates; m i is the mass of each organ and tissue of the chest body segment 12; p i represents the sagittal diameter of each organ and tissue of the chest body segment 12 relative to the origin of coordinates.
The lower weight 22 is a regular cube, and the centroid position C Lower part(s) of the lower weight 22 is easily obtained
Wherein r k is the vertical distance from each organ and tissue of the human body model of the upper part 11 (head, neck and arm) of the human body to the rotating shaft 13 of the chest body section 12; m k is the mass of the organs and tissues of the phantom from which the upper part 11 (head, neck and arms) of the human body is removed; r i is the vertical distance from each organ and tissue of the chest body segment 12 to the axis of rotation 13 of the chest body segment 12; m i is the mass of each organ and tissue of the chest body segment 12; z C Lower part(s) is the Z-axis coordinate of the center of mass of the lower counterweight 22; z C Impact module is the Z-axis coordinate of the mass center of the impact module.
In step S500, referring to fig. 3 and 4, the weights are mounted according to the calculated mass m Upper part of the upper weight 21 and the calculated mass m Lower part(s) of the lower weight 22.
Step S600, verifying whether the quality of the upper balancing weight and the lower balancing weight is accurate, wherein the specific steps are as follows:
Step S601, comparing with the pendulum force limit value specified in the ISO/TR 9790 document, step S601, performing pendulum impact test on the chest impact module mounted with the upper and lower counterweights 21 and 22 using the dummy calibration device.
In step S602, the Pendulum Force curve obtained by the Pendulum impact test is compared with the Pendulum Force Limit value specified in the ISO/TR 9790 document, referring to fig. 5, the abscissa in the figure is time (unit ms), the ordinate is Pendulum Force (unit N), the Lower Limit is the specified Lower Limit of Pendulum Force, the Upper Limit is the specified Upper Limit of Pendulum Force, the Pendulum Force curve is the Pendulum Force curve obtained by the Pendulum impact test, and if the Pendulum Force curve is within the range of the Pendulum Force Limit value channel, the weight of the balancing weight is accurate.
The embodiment also comprises a human chest impact module weight system which can realize all the steps of the weight method of the human chest impact module.
Example two
Referring to fig. 6 and 7, a human chest impact module includes a damping module, a measuring module, a fixing bracket, and a rib module. The chest portion is specifically referred to as the chest body segment, and is specifically defined as the range from the upper tangent point of the first rib to the lower tangent point of the tenth rib when a pedestrian stands.
Referring to fig. 8 and 9, the damping module includes a guide rail 31, a slide rail 32, a damper 33, a first spring 34, a second spring 35 and a connecting rod 37, wherein the guide rail 31 is detachably connected with a guide rail fixing plate 51 through a screw 39, one end of the guide rail 31 is provided with an air vent 312, the other end is provided with a first through hole 311, the first through hole 311 is internally provided with the first spring 34, one end of the guide rail 31 provided with the first through hole 311 is also provided with an anti-collision block 313, so that the rib 61 and the guide rail 31 are prevented from being damaged due to collision in extreme cases, and the buffering and limiting effects are achieved; the sliding rail 32 is a hexagonal prism and slides in a matched manner with the V surface of the first through hole 311; one end of the sliding rail 32 is detachably connected with the screw 39 on the inner side of the rib 61, the other end of the sliding rail is provided with a second through hole 321, and a damper 33 and a second spring 35 are arranged in the second through hole 321; the damper 33 is in clearance fit with the second through hole 321, one end of the damper 33 is provided with a stepped boss, the boss is sleeved with the first spring 34, and the other end of the damper 33 is provided with a third through hole 331; the third through hole 331 is internally provided with a stop block 38 to form a cavity, the cavity is internally provided with a piston 36 in clearance fit with the third through hole 331, the piston 36 is fixedly connected with one end of a connecting rod 37, the other end of the connecting rod 37 is connected with a screw 39 of the sliding rail 32, the middle of the connecting rod 37 is provided with a second spring 35, and one end of the second spring 35 abuts against the stop block 38.
The measuring module includes a distance measuring sensor 40, and the distance measuring sensor 40 is fixedly connected to the side of the guide rail 31 through a screw 39, and detects the deformation amount when the rib 61 is deformed by impact.
The fixing support comprises connecting plates 52, guide rail fixing plates 51 and rib fixing plates 53, the two guide rail fixing plates 51 are connected through four connecting plates 52 by using screws 39, the fixing support is in a 'mesh' -shaped structure, and the rib fixing plates 53 are connected with the guide rail fixing plates 51 through the screws 39.
The rib module comprises ribs 61 and skin foam 62, the skin foam 62 is fixedly connected to the outer side of the ribs 61 through an adhesive, the ribs 61 are fixedly connected to the rib fixing plate 53 through screws 39, in the embodiment, the rib module comprises three ribs 61, the height of each rib 61 is 40mm, the gap between the ribs 61 is 16mm, the size is designed according to rib 61 anatomical data of a Chinese human body, the height of the human body is closely related to the gravity center position, the moment of inertia, the radius of rotation and the like from the ergonomic point of view, the chest compression value which is consistent with the size of the human body of the Chinese human body and is not caused to deviate from the size of the human body of the Chinese human body, and the chest injury degree when the Chinese human body is impacted transversely across the road can be represented by the experimentally obtained response.
The specific implementation process is as follows:
In the embodiment, the standard hammer can be used for impacting three ribs 61, the ribs 61 deform to drive the sliding rail 32 and the connecting rod 37 to move leftwards, under the extrusion of the sliding rail 32, the second spring 35 contracts and stores the force and extrudes the damper 33, the damper 33 moves leftwards to extrude the first spring 34, and when the piston 36 slides to the leftmost side of the third through hole 331 to abut against, the first spring 34 abuts against the first through hole 311 under the further extrusion of the damper 33 to contract and store the force; the first spring 34 is contracted to the shortest and then stretched to drive the damper 33 to move rightwards, the second spring 35 is stretched to drive the slide rail 32 and the connecting rod 37 to move rightwards, the process forms a deformation simulation of the rib 61 with the damping-spring-mass, and the ranging sensor 40 continuously detects the deformation amplitude of the rib 61.
Example III
The distinguishing technical features of the present embodiment and the second embodiment are that, referring to fig. 10, the measurement module further includes a controller, a storage module, and an analysis module, where the controller is electrically connected to the storage module, the analysis module, and the ranging sensor. The storage module is used for storing deformation data of the ranging sensor 40, and the data of the deformation stage is sent to the analysis module after the rib 61 is deformed, so that the measured rib deformation can be converted into collision force.
Referring to FIG. 11, the ranging sensor measures the deformation x of the ribs in the contraction direction of the damper, the collision force of the single rib at 2m/s, 3m/s and 4m/s nominal hammer collision speed is F 2、F3、F4, and the specific force function expression is as follows:
wherein F represents the transverse collision force, and the collision force-deformation curve of the single rib module under different collision speeds is obtained according to the transverse collision force.
The chest impact module of the human body in the embodiment realizes the mechanical property similar to the chest elasticity of a real pedestrian, so that the chest impact module can reflect the chest deformation condition of the real human body under the transverse impact working condition, and the impact force-deformation curve of a single rib module under different impact speeds is obtained, and can represent the impact working condition of most pedestrian-vehicle impact accidents, so that the application range is wider.
The embodiment also comprises a human chest impact module weight system which can realize all the steps of the method.
Embodiments of the present application also include a storage medium having a computer program stored therein, which when executed by a processor, performs all the steps of any of the methods of the embodiments described above.
Those skilled in the art will appreciate that the above-described process for implementing all or a portion of a method for weighting a chest impact module may be implemented by means of a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and the program may include the process for implementing the above-described embodiments of a method for weighting a chest impact module. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SYNCHLINK) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The foregoing is merely exemplary of the present application, and specific structures and features well known in the art will not be described in detail herein, so that those skilled in the art will be aware of all the prior art to which the present application pertains, and will be able to ascertain the general knowledge of the technical field in the application or prior art, and will not be able to ascertain the general knowledge of the technical field in the prior art, without using the prior art, to practice the present application, with the aid of the present application, to ascertain the general knowledge of the same general knowledge of the technical field in general purpose. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present application, and these should also be considered as the scope of the present application, which does not affect the effect of the implementation of the present application and the utility of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (4)
1. A human chest impact module weight balancing method, which is characterized in that: comprising the following steps:
Step S100, adjusting the mass center C Impact module of the impact module, wherein the mass center C Impact module is positioned at the center of each symmetry plane of the rib at the middle of the impact module on the symmetry plane, and the mass center C Impact module is positioned at the rear of the rib on the asymmetric plane;
step 200, placing the human body model in a space rectangular coordinate system and dividing the human body model into a human body upper part, a chest body section and a human body lower part; a rotating shaft is arranged for calculating the moment of inertia, passes through the centroid C Chest of the chest body section and is parallel to the coronal axis of the human body;
Step S300, arranging an upper balancing weight above the impact module for simulating the weight of the upper part of the human body, calculating the rotational inertia I Upper part of the upper part of the human body, and obtaining the mass m Upper part of the upper balancing weight according to the rotational inertia I Upper part ;
The calculation formula of the moment of inertia I Upper part is as follows:
Wherein r i is the vertical distance from each organ and tissue in the chest body segment to the rotating shaft; m i is the mass of each organ and tissue in the chest body segment, and r n is the vertical distance from each organ and tissue in the phantom of the lower part of the human body to the rotation axis of the chest body segment; m n is the mass of each organ and tissue in the human body model of the lower part of the human body;
The calculation formula of the mass m Upper part of the upper balancing weight is as follows:
Wherein Z C Upper part is the Z-axis coordinate of the mass center of the upper balancing weight; z C Impact module is the Z-axis coordinate of the mass center of the impact module;
step S400, arranging a lower balancing weight below the impact module for simulating the weight of the lower part of the human body, calculating the moment of inertia I Lower part(s) of the lower part of the human body, and obtaining the mass m Lower part(s) of the lower balancing weight according to the moment of inertia I Lower part(s) ;
The calculation formula of the mass m Lower part(s) of the lower balancing weight is as follows:
wherein r k is the vertical distance from each organ and tissue of the human body model on the upper part of the human body to the rotating shaft of the chest body section; m k is the mass of each organ and tissue of the human body model of the upper part of the human body; r i is the vertical distance from each organ and tissue of the chest body segment to the rotation axis of the chest body segment; m i is the mass of each organ and tissue of the chest body segment; z C Lower part(s) is the Z-axis coordinate of the mass center of the lower balancing weight; z C Impact module is the Z-axis coordinate of the mass center of the impact module;
Step S500, installing the balancing weights according to the upper balancing weight mass m Upper part and the lower balancing weight mass m Lower part(s) ;
step S600, verifying whether the quality of the upper balancing weight and the lower balancing weight is accurate.
2. The method for weighting a chest impact module of a person according to claim 1, wherein: the step S600 includes:
step S601, pendulum impact test is carried out on a human chest impact module provided with an upper balancing weight and a lower balancing weight by using dummy calibration equipment;
and step S602, comparing the pendulum force curve obtained through the pendulum impact test with a specified pendulum force limit curve, and if the pendulum force curve is in the range of the pendulum force limit channel, accurately weighing the balancing weight.
3. A human chest impact module weight system, characterized by: a method of weighting a chest impact module according to any one of claims 1-2.
4. A storage medium, characterized by: the storage medium stores a computer program which, when executed by a processor, enables a method for weighting a human chest impact module according to any one of claims 1-2.
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