Collision dummy chest skin calibration device, calibration method and storage medium

Abstract

The present invention relates to the field of crash dummies, and discloses a calibration device for the chest skin of a crash dummy, a calibration method, an electronic device, and a storage medium. The calibration device includes: a support device, a chest skin fixing device, a pendulum positioning device, a pendulum control device, and a movable pendulum; wherein, the chest skin fixing device is used to fix the chest skin of the crash dummy to the target position of the calibration device; the pendulum positioning device cooperates with the movable pendulum to limit the movement of the movable pendulum after the movable pendulum first impacts the chest skin of the crash dummy, and prevent the movable pendulum from making a second impact on the chest skin of the crash dummy; the pendulum control device is used to adjust the position where the movable pendulum impacts the chest skin of the crash dummy. This embodiment can effectively achieve the calibration of the chest vest skin, thereby further improving the consistency of the responses of different dummy chest assemblies when impacted, and further improving the accuracy of the crash test results.

Description

Technical Field

[0001] The present invention relates to the field of vehicle crash dummies, and particularly to a calibration device for the chest skin of a crash dummy, a calibration method, an electronic device, and a storage medium. Background Art

[0002] The chest assembly of a vehicle crash dummy consists of ribs with different performances, a vest skin on the chest, and connecting fittings. The ribs and the chest vest skin play a major role in chest calibration. Each rib is composed of high-strength steel and damping material bonded together, and the vest skin is made of PVC + polyurethane foam material.

[0003] In the crash dummy standard 49 CFR part 57.34, only the performance requirements of the chest assembly under standard working conditions are specified, and the calibration method and performance requirements for the chest vest skin are not determined. This results in the situation that combinations of chest parts with large performance differences may also meet the performance requirements of the chest assembly. Consequently, under non-standard working conditions, there are significant differences in the mechanical responses of different dummy chests when hitting the same position, which affects the accuracy of crash test results.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a calibration device for the chest skin of a crash dummy, a test and evaluation method, an electronic device, and a storage medium. The device can effectively calibrate the chest vest skin, and at the same time, the corresponding calibration method can accurately evaluate the quality of the performance of the chest vest skin, thereby further improving the consistency of the responses when different dummy chest assemblies are impacted, and further improving the accuracy of crash test results.

[0006] An embodiment of the present invention provides a calibration device for the chest skin of a crash dummy, which includes:

[0007] A support device; a chest skin fixing device, a pendulum positioning device, and a pendulum control device provided on the support device; and a movable pendulum connected to the pendulum control device;

[0008] Wherein, the support device is used to carry the chest skin fixing device, the pendulum positioning device, and the pendulum control device; the chest skin fixing device is used to fix the dummy chest skin to the target position of the calibration device;

[0009] The pendulum positioning device cooperates with the movable pendulum to limit the movement of the movable pendulum after the movable pendulum first impacts the dummy chest skin, preventing the movable pendulum from making a second impact on the dummy chest skin; the pendulum control device is used to adjust the position where the movable pendulum impacts the dummy chest skin;

[0010] An acceleration sensor is installed on the non-impacting end of the movable pendulum. The acceleration sensor is used to detect the chest compression displacement when the movable pendulum impacts the chest skin of the dummy. The target position is the position where the movable pendulum impacts the chest skin of the dummy; the chest skin fixing device includes a pressure sensor for detecting the chest compression force when the movable pendulum impacts the chest skin of the dummy.

[0011] An embodiment of the present invention provides a method for calibrating the chest skin of a crash dummy, which is carried out based on the above-mentioned crash dummy chest skin calibration device. The method includes:

[0012] For each set position among multiple set positions of each dummy chest skin in multiple different dummy chest skins, impact tests with a set speed are respectively carried out by the movable pendulum;

[0013] When carrying out the impact test with the set speed, the chest compression displacement of each set position of each dummy chest skin is respectively obtained through the acceleration sensor, and the chest compression force of each set position of each dummy chest skin is obtained through the pressure sensor;

[0014] For each set position of each dummy chest skin, a first curve of the chest compression displacement and the chest compression force corresponding to the current set position of the current dummy chest skin is drawn based on the chest compression displacement and the chest compression force of the current set position of the current dummy chest skin, and a buffer coefficient corresponding to the current set position of the current dummy chest skin is determined according to the first curve;

[0015] A buffer coefficient average value corresponding to the current set position is determined based on the buffer coefficients respectively corresponding to the current set positions of each dummy chest skin;

[0016] A standard deviation corresponding to the current set position is determined based on the buffer coefficient average value corresponding to the current set position and the buffer coefficients respectively corresponding to the set positions of each dummy chest skin;

[0017] A calibration range of the current set position is determined based on the buffer coefficient corresponding to the current set position and the standard deviation corresponding to the current set position;

[0018] Wherein, the current dummy chest skin is any one of the multiple different dummy chest skins, and the current set position is any one of the multiple set positions.

[0019] An embodiment of the present invention provides an electronic device, and the electronic device includes:

[0020] A processor and a memory;

[0021] The processor is used to execute the steps of the chest skin calibration method for a crash dummy according to any one of the embodiments by calling the programs or instructions stored in the memory.

[0022] An embodiment of the present invention provides a computer-readable storage medium storing programs or instructions, and the programs or instructions cause a computer to execute the steps of the chest skin calibration method for a crash dummy according to any one of the embodiments.

[0023] The embodiments of the present invention have the following technical effects:

[0024] It can effectively calibrate the skin of the chest vest, and at the same time, the corresponding calibration method can accurately evaluate the quality of the chest vest skin performance, thereby further improving the consistency of the responses of different dummy chest assemblies when impacted, and further improving the accuracy of the crash test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is a structural block diagram of a chest skin calibration device for a crash dummy provided by an embodiment of the present invention;

[0027] Figure 2 is a structural schematic diagram of a chest skin calibration device for a crash dummy provided by an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of a movable pendulum and a pendulum positioning structure provided by an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the impact position of the dummy chest skin provided by an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of a curve of chest compression displacement C and chest compression force F provided by an embodiment of the present invention;

[0031] Figure 6 is a schematic flow chart of a chest skin calibration method for a crash dummy provided by an embodiment of the present invention;

[0032] Figure 7 is a structural schematic diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative efforts fall within the scope of protection of the present invention.

[0034] The collision dummy chest skin calibration device provided by the embodiments of the present invention is mainly applicable to calibrating the chest skin of a collision dummy and testing the chest skin of a collision dummy to be evaluated, so as to determine the performance advantages and disadvantages of the chest skin of the collision dummy to be evaluated. The collision dummy chest skin calibration method provided by the embodiments of the present invention can be executed by an electronic device.

[0035] Figure 1 is a structural block diagram of a collision dummy chest skin calibration device provided by an embodiment of the present invention. Refer to Figure 1 , the collision dummy chest skin calibration device specifically includes: a support device 110, a chest skin fixing device 120, a pendulum positioning device 130, and a pendulum control device 140.

[0036] Among them, the support device 110 is used to carry the chest skin fixing device 120, the pendulum positioning device 130, and the pendulum control device 140; the chest skin fixing device 120 is used to fix the dummy chest skin to the target position of the calibration device. The pendulum positioning device 130 cooperates with the moving pendulum ( Figure 1 not shown in the figure) to limit the movement of the moving pendulum after the first impact on the dummy chest skin, preventing the moving pendulum from making a second impact on the dummy chest skin; the pendulum control device 140 is used to adjust the position where the moving pendulum impacts the dummy chest skin; an acceleration sensor is installed on the non-impacting end of the moving pendulum, and the acceleration sensor is used to detect the chest compression displacement when the moving pendulum impacts the dummy chest skin, and the target position is the position where the moving pendulum impacts the dummy chest skin; the chest skin fixing device 120 includes a pressure sensor 121 for detecting the chest compression force when the moving pendulum impacts the dummy chest skin.

[0037] Exemplarily, the implementation of the support device may specifically be a structure with a support function such as a support frame or a support table. The implementation of the pendulum positioning device 130 may be two rod-shaped objects (e.g., two cylindrical rigid rods) mounted on the support device, and the movable pendulum passes through the space between the two rod-shaped objects to hit the dummy's chest skin. In other words, the movable pendulum needs to pass through the space between the two rod-shaped objects when hitting the dummy's chest skin. Correspondingly, the movable pendulum includes a limiting structure, and when hitting the dummy's chest skin, the limiting structure automatically pops up, and the popped-up limiting structure cooperates with the two rod-shaped objects to limit the movement of the movable pendulum and prevent the movable pendulum from hitting the dummy's chest skin for a second time. Furthermore, the two rod-shaped objects are connected to the support device through a slide groove, and the slide groove is used to change the distance between the two rod-shaped objects and the dummy's chest, and / or change the distance between the two rod-shaped objects.

[0038] Optionally, the movable pendulum may be caught by the two rods through its limiting structure, thereby limiting the movement of the movable pendulum and preventing the movable pendulum from hitting the dummy's chest skin for a second time. It is understandable that at this time, when the movable pendulum hits the dummy's chest skin and rebounds, it returns and passes through the space between the two rods, thereby being caught by the two rods with the help of its own limiting structure. Other embodiments are also possible, for example, when the movable pendulum passes through the space between the two rods for the second time, the space between the two rods is automatically adjusted to prevent the movable pendulum from passing through again, or when the movable pendulum passes through the space between the two rods for the second time, the limiting structure set on the two rods automatically pops up to prevent the movable pendulum from passing through the space between the two rods for the third time, thereby preventing the movable pendulum from hitting the dummy's chest skin for the second time.

[0039] For example, see Figure 2 The schematic diagram of the structure of a collision dummy chest skin calibration device is shown, which includes a support frame 1, a movable pendulum 2, a pendulum control line 3, a pendulum height adjustment line 4, a rod 5 for pendulum clamping, a chest skin fixing device 6, dummy chest skin 7, a bottom slide 8 for moving the rod 5, and a slide 10 for adjusting the left and right positions of the pendulum control line 3. Among them, the support frame 1 is mainly used to carry the chest skin fixing device 6, the rod 5 for pendulum clamping and the movable pendulum 2, and the entire calibration process also needs to rely on the support frame 1 to complete.

[0040] The chest skin fixing device 6 is used to fix the skin 7 of the dummy's chest to a suitable position of the calibration device. The chest skin fixing device 6 mainly includes two parts: a supporting spine and a contoured rib.

[0041] The movable pendulum 2 is mainly a device used for impact calibration of the chest vest skin 7. The speed, mass, etc. of the movable pendulum 2 directly affect the calibration result of the chest vest skin 7. The structure of the movable pendulum 2 can be such that the diameters of the cylinders at both ends are equal and slightly larger than the diameter of the middle cylinder. A limiting structure can be provided on the front cylinder of the movable pendulum 2, which will automatically pop out when the movable pendulum 2 is subjected to an impact force. The rod-shaped object 5 for pendulum positioning cooperates with the popped-out limiting structure to prevent the chest skin 7 from being impacted a second time. Further, referring to Figure 3 as shown in the schematic diagram of a movable pendulum and a pendulum positioning structure, a limiting structure 21 is provided on the front cylinder of the movable pendulum 2. The limiting structure 21 automatically pops out when the movable pendulum 2 impacts the chest skin 7 of the dummy. When the movable pendulum 2 rebounds, it can pass through the space between the two rod-shaped objects 5, but it cannot move towards the chest of the dummy again. When moving towards the chest of the dummy, the two rod-shaped objects 5 cooperate with the limiting structure 21 to achieve the purpose of preventing the chest skin 7 of the dummy from being impacted a second time.

[0042] The pendulum height adjustment line 4 is a non-elastic rope. The release height of the movable pendulum can be adjusted by adjusting the length of the line to achieve the required pendulum speed. The pendulum height adjustment line 4 is connected to the pendulum control line 3 through a locking ring structure. The pendulum control line 3 is a non-elastic rope structure used to suspend the movable pendulum 2 on the support frame 1.

[0043] Generally speaking, the pendulum control device includes a pendulum control line 3 and a pendulum height adjustment line 4. The pendulum height adjustment line 4 is a non-elastic line used to adjust the release height of the movable pendulum 2 to adjust the position where the movable pendulum 2 impacts the chest skin 7 of the dummy; the pendulum control line 3 is used to suspend the movable pendulum 2 on the support device 1, and the pendulum height adjustment line 4 is connected to the pendulum control line 3 through a locking ring structure 9. The chest skin fixing device 6 includes: a support spine and contoured ribs; the pressure sensor is arranged in the space between the contoured ribs and the support spine.

[0044] When calibrating the chest skin of the crash dummy, the speed at which the movable pendulum impacts the chest skin of the dummy can be determined according to the test requirements or the provisions of relevant standards, and then the height of the movable pendulum can be adjusted through the pendulum height adjustment line based on this speed, so as to achieve the required impact speed.

[0045] Exemplarily, the speed of the movable pendulum is obtained through the relative speed between the vehicle and the person's chest during a real vehicle collision to simulate the relative speed during a real collision. Specifically:

[0046] V (pendulum) = V (person's chest) - V (real vehicle)

[0047] Wherein, V (pendulum) represents the required impact speed, that is, the set speed of the movable pendulum, and V (person's chest) - V (real vehicle) represents the relative speed between the vehicle and the person's chest during a real vehicle collision.

[0048] After determining the speed of the movable pendulum, the height of the movable pendulum can be determined according to the relationship between speed and displacement. Specifically, the calculation method of the height H (pendulum) of the movable pendulum is as follows:

[0049] H (pendulum) = 0.5V 2 (pendulum) / g, where g represents the acceleration due to gravity, H (pendulum) represents the height of the movable pendulum, and V (pendulum) represents the speed of the movable pendulum.

[0050] According to the calculated height value H (pendulum), the movable pendulum is adjusted to the specified height through the pendulum height adjustment line, and the movable pendulum is adjusted to the appropriate position according to the impact position through the pendulum height adjustment line. It can be understood that the calculated height value H (pendulum) is the relative height between the movable pendulum and the impact position.

[0051] After adjusting the height and position of the movable pendulum, the chest vest skin of the crash dummy is installed on the chest skin fixing device. The front skin of the crash dummy's chest is closely attached to the contoured rib structure of the chest fixing device, and the center line position of the chest is aligned with the center line position of the ribs to prevent deviation in placement. The two rod-shaped objects of the pendulum positioning device are adjusted to the appropriate position for chest impact through the bottom chute (for example, if the impact speed is large, the two rod-shaped objects need to be farther away from the dummy's chest; if the impact speed is small, the two rod-shaped objects need to be closer to the dummy's chest to ensure that the movement of the movable pendulum can be restricted when it rebounds and prevent the dummy's chest from being impacted a second time), and are fastened to the support frame with bolts. After the above process is completed, the locking ring is controlled by the electromagnetic controller to open, and the movable pendulum is released to make the movable pendulum naturally impact the chest vest skin of the dummy. After the impact, the limiting structure of the movable pendulum pops out and cooperates with the pendulum positioning device after rebounding to fix the movable pendulum, completing one impact calibration test.

[0052] The impact positions can be respectively at the upper 1 / 3, lower 1 / 3, left 1 / 3, and right 1 / 3 of the chest midline, such as Figure 4A schematic diagram of the impact positions on the chest skin of a dummy, including four impact positions. For the convenience of distinction, the four impact positions can be respectively marked as the first impact position 410, the second impact position 420, the third impact position 430, and the fourth impact position 440. Among them, the first impact position 410 is at the upper 1 / 3 of the horizontal chest midline, the second impact position 420 is at the lower 1 / 3 of the horizontal chest midline, the third impact position 430 is at the left 1 / 3 of the vertical chest midline, and the fourth impact position 440 is at the right 1 / 3 of the vertical chest midline. Among them, the total width of the chest skin of the dummy is marked as L, and the total height is marked as M. The distance between the center of the first impact position 410 and the horizontal chest midline is M / 6, the distance between the horizontal chest midline and the top is 0.5M, and the distance between the center of the third impact position 430 and the vertical chest midline is L / 6. To further evaluate the quality of the chest vest skin, the performance score of the chest vest skin can be evaluated according to the weight ratio of the impact positions. In actual working conditions, most of the impact positions on the chest of the frontal impact dummy are in the middle, and fewer are on both sides. Therefore, different weight ratios can be assigned to different impact positions. For example, the weights of the upper 1 / 3 and the lower 1 / 3 of the chest midline are 0.35 and 0.35 respectively, and the weights of the left 1 / 3 and the right 1 / 3 are 0.15 and 0.15 respectively.

[0053] The specific method for calibrating the chest skin of the collision dummy is as follows:

[0054] Select 10 pieces of specific chest vests of the dummy (the 10 pieces of chest vests of the dummy are skins with better performance after identification). For each piece of chest vest of the dummy, conduct impact tests respectively according to the above description, and collect data during the impact test (including chest compression displacement C and chest compression force F). A total of 10 groups of data are obtained, and each group of data contains data of four impact positions. For the data of each impact position, draw curves of chest compression displacement C and chest compression force F, as Figure 5 shown in a schematic diagram of the curves of chest compression displacement C and chest compression force F, that is, each impact position corresponds to a curve as Figure 5 shown. According to the curves of the 10 chest vests corresponding to the same impact position, calculate the buffer coefficient during the loading and unloading processes. Loading refers to the process of the active pendulum impacting the chest vest skin and the chest vest skin compressing. The work done by the active pendulum during the loading process is S 1i，j =F 加 ×C. Unloading refers to the process of the active pendulum rebounding after impacting the chest vest skin. The work done by the active pendulum during the unloading process is S 2i，j =F 卸 ×C. Among them, F 加 refers to the curve during the loading process, and F 卸 refers to the curve during the unloading process.

[0055] The calculation formula for the buffering coefficient is shown as the following formula (1):

[0056] D i，j =(S 1i，j -S 2i，j ) / S 1i，j (1)

[0057] Wherein, D i，j represents the buffering coefficient, S 1i , j represents the work done by the moving pendulum during the loading process, S 2i , j represents the work done by the moving pendulum during the unloading process, i represents the group (i = 1,2,3,4,5,6,7,8,9,10), and j represents the position (j = 1,2,3,4).

[0058] The average value of the buffering coefficient D1 at the first impact position in 10 groups of data = ∑(D i，1 ) / 10; the average value of the buffering coefficient D2 at the second impact position in 10 groups of data = ∑(D i，2 ) / 10; the average value of the buffering coefficient D3 at the third impact position in 10 groups of data = ∑(D i，3 ) / 10; the average value of the buffering coefficient D4 at the fourth impact position in 10 groups of data = ∑(D i，4 ) / 10.

[0059] The corresponding standard deviation of the buffering coefficient is:[[]]

[0060] The standard deviation of the buffering coefficient q1 at the first impact position = sqrt((D 1，1 -D1) 2 +(D 2，1 -D1) 2 +(D 3，1 -D1) 2 +(D 4，1 -D1) 2 +(D 5，1 -D1) 2 +(D 6，1 -D1) 2 +(D 7，1 -D1) 2 +(D 8，1 -D1) 2 +(D 9，1 -D1) 2 +(D 10，1 -D1) 2 ).

[0061] The standard deviation of the buffering coefficient q2 at the second impact position = sqrt((D 1，2 -D2)2 +(D 2，2 -D2) 2 +(D 3，2 -D2) 2 +(D 4，2 -D2) 2 +(D 5，2 -D2) 2 +(D 6，2 -D2) 2 +(D 7，2 -D2) 2 +(D 8，2 -D2) 2 +(D 9，2 -D2) 2 +(D 10，2 -D2) 2 )。

[0062] The standard deviation q3 of the buffer coefficient at the third impact position = sqrt((D 1，3 -D3) 2 +(D 2，3 -D3) 2 +(D 3，3 -D3) 2 +(D 4，3 -D3) 2 +(D 5，3 -D3) 2 +(D 6，3 -D3) 2 +(D 7，3 -D3) 2 +(D 8，3 -D3) 2 +(D 9，3 -D3) 2 +(D 10，3 -D3) 2 )。

[0063] The standard deviation q4 of the buffer coefficient at the fourth impact position = sqrt((D 1，4 -D4) 2 +(D 2，4 -D4) 2 +(D 3，4 -D4) 2 +(D 4，4 -D4) 2 +(D 5，4 -D4) 2 +(D 6，4 -D4) 2 +(D 7，4 -D4) 2 +(D 8，4 -D4) 2+(D 9，4 -D4) 2 +(D 10，4 -D4) 2 )。

[0064] The calibrated qualified channel is D 合格 = Dm ± qm, where Dm represents the average buffer coefficient at the impact position m, qm represents the standard deviation of the buffer coefficient at the impact position m, and m = 1, 2, 3, 4 represent different impact positions.

[0065] To further evaluate the quality of the chest vest skin, the performance score of the chest vest skin is determined according to the impact weight ratio. In actual working conditions, the middle position of the front collision dummy's chest is more frequent, and the two sides are less. The weight ratios of the four impact positions are 0.35 for the first impact position, 0.35 for the second impact position, 0.15 for the third impact position, and 0.15 for the fourth impact position. The calculation formula for the performance score T of the chest vest skin is as follows formula (2):

[0066] T = 0.35(q1 - (D1 实测 - D1)) / q1 + 0.35(q2 - (D2 实测 - D2)) / q2 + 0.15(q3 - (D3 实测 - D3)) / q3 + 0.15(q4 - (D4 实测 - D4)) / q4 (2)

[0067] Where D1 实测 , D2 实测 , D3 实测 , D4 实测 represent the buffer coefficients of different impact positions of the chest vest skin that actually need to be measured and evaluated. Specifically, D1 实测 represents the buffer coefficient of the first impact position (1 / 3 above the chest midline) of the chest vest skin to be evaluated; D2 实测 represents the buffer coefficient of the second impact position (1 / 3 below the chest midline) of the chest vest skin to be evaluated; D3 实测 represents the buffer coefficient of the third impact position (1 / 3 to the left of the chest midline) of the chest vest skin to be evaluated, and D4 实测 represents the buffer coefficient of the fourth impact position (1 / 3 to the right of the chest midline) of the chest vest skin to be evaluated.

[0068] When evaluating the performance of the dummy's chest vest skin according to the performance score, refer to Table 1 below. According to the performance score of the chest vest skin, the calibrated skin can be divided into three grades: A, B, and C. The higher the performance score, the higher the grade, indicating better skin performance and higher bionic degree.

[0069] Table 1: Corresponding Relationship Table between Chest Vest Skin Score and Performance Grade

[0070] Level Score A 0.8-1 B 0.5-0.8 C 0-0.5

[0071] In a specific embodiment, assume that D1 = 0.75, D2 = 0.68, D3 = 0.53, D4 = 0.53; q1 = 0.03, q2 = 0.02, q3 = 0.04, q4 = 0.04. Then the calibration qualified range of the first impact position among the four impact positions is D1 = 0.75 ± 0.03; the calibration qualified range of the second impact position is D2 = 0.68 ± 0.02; the calibration qualified range of the third impact position is D3 = 0.53 ± 0.04; the calibration qualified range of the fourth impact position is D4 = 0.53 ± 0.02.

[0072] Assume that for the chest vest skin of a certain test dummy to be calibrated, the buffer coefficients of the four impact positions are: D1 实测 = 0.76, D2 实测 = 0.68, D3 实测 = 0.53, D4 实测 = 0.51, all within the calibration qualified range.

[0073] To further evaluate the quality of the above chest vest skin, the performance score of the chest vest skin can be calculated according to the impact weight ratio. The performance score T can be obtained according to the weight ratios of 0.35, 0.35, 0.15, and 0.15 respectively:

[0074] T = 0.35(q1 - (D1 实测 - D1)) / q1 + 0.35(q2 - (D2 实测 - D2)) / q2 + 0.15(q3 - (D3 实测 - D3)) / q3 + 0.15(q4 - (D4 实测 - D4)) / q4

[0075] = 0.35(0.03 - (0.76 - 0.75)) / 0.03 + 0.35(0.02 - (0.68 - 0.68)) / 0.02 + 0.15(0.04 - (0.53 - 0.53)) / 0.04 + 0.15(0.04 - (0.51 - 0.53)) / 0.04

[0076] = 0.96

[0077] Referring to Table 1 above, it can be determined that the chest vest skin belongs to Class A vest skin.

[0078] Generally speaking, the embodiment of the present invention provides a calibration method for the chest skin of a collision dummy, which is carried out based on the above-mentioned calibration device for the chest skin of a collision dummy, asFigure 6 As shown, the method includes the following steps:

[0079] S610. For each set position among multiple set positions of each dummy chest skin in multiple different dummy chest skins, perform an impact test at a set speed through the movable pendulum respectively.

[0080] For example, select 10 pieces of specific dummy chest vest skins (the 10 pieces of dummy chest vest skins are skins with good performance through identification). For four positions of each dummy chest vest skin (for example, 1 / 3 above the midline of the chest, 1 / 3 below the midline of the chest, 1 / 3 to the left of the midline of the chest, and 1 / 3 to the right of the midline of the chest, refer to Figure 4 as shown), perform an impact test at a set speed through the movable pendulum respectively.

[0081] S620. When performing the impact test at the set speed, respectively obtain the chest compression displacement of each set position of each dummy chest skin through an acceleration sensor, and obtain the chest compression force of each set position of each dummy chest skin through a pressure sensor.

[0082] For example, select 10 pieces of specific dummy chest vest skins. Perform an impact test at a set speed through the movable pendulum for four positions of each dummy chest vest skin respectively, and collect relevant data. 10 groups of data can be obtained. Each group of data contains data of four impact positions. The data of each impact position includes chest compression displacement C and chest compression force F. Therefore, a curve of chest compression displacement C and chest compression force F can be drawn for each impact position (as Figure 5 shown).

[0083] S630. For each set position of each dummy chest skin, draw a first curve of chest compression displacement and chest compression force corresponding to the current set position of the current dummy chest skin based on the chest compression displacement and chest compression force of the current set position of the current dummy chest skin, and determine the buffer coefficient corresponding to the current set position of the current dummy chest skin according to the first curve.

[0084] Specifically, determine the area S 1i，j of the loading process and the area S 2i，j of the unloading process according to the first curve, and then determine the buffer coefficient according to the area S 1i，j of the loading process and the area S 2i，j of the unloading process, as shown in the above formula (1).

[0085] S640. Determine the average buffer coefficient corresponding to the current set position based on the buffer coefficients respectively corresponding to the current set positions of each dummy chest skin.

[0086] S650. Determine the standard deviation corresponding to the current set position based on the average buffering coefficient corresponding to the current set position and the buffering coefficients corresponding to the respective set positions of the chest skin of each dummy.

[0087] For example, the standard deviation q1 of the buffering coefficient at the first impact position = sqrt((D 1，1 - D1) 2 +(D 2，1 - D1) 2 +(D 3，1 - D1) 2 +(D 4，1 - D1) 2 +(D 5，1 - D1) 2 +(D 6，1 - D1) 2 +(D 7，1 - D1) 2 +(D 8，1 - D1) 2 +(D 9，1 - D1) 2 +(D 10，1 - D1) 2 ).

[0088] The standard deviation q2 of the buffering coefficient at the second impact position = sqrt((D 1，2 - D2) 2 +(D 2，2 - D2)2 + (D 3，2 - D2) 2 +(D 4，2 - D2) 2 +(D 5，2 - D2) 2 +(D 6，2 - D2) 2 +(D 7，2 - D2) 2 +(D 8，2 - D2) 2 +(D 9，2 - D2) 2 +(D 10，2 - D2) 2 ).

[0089] The standard deviation q3 of the buffering coefficient at the third impact position = sqrt((D 1，3 - D3) 2 +(D 2，3 - D3) 2 +(D 3，3 - D3) 2 +(D 4，3 - D3) 2 +(D5，3 - D3) 2 +(D 6，3 - D3) 2 +(D 7，3 - D3) 2 +(D 8，3 - D3) 2 +(D 9，3 - D3) 2 +(D 10，3 - D3) 2 )。

[0090] The standard deviation q4 of the buffer coefficient at the fourth impact position = sqrt((D 1，4 - D4) 2 +(D 2，4 - D4) 2 +(D 3，4 - D4) 2 +(D 4，4 - D4) 2 +(D 5，4 - D4) 2 +(D 6，4 - D4) 2 +(D 7，4 - D4) 2 +(D 8，4 - D4) 2 +(D 9，4 - D4) 2 +(D 10，4 - D4) 2 )。

[0091] where D i，j represents the buffer coefficient at the impact position j of the dummy's chest skin i. i represents the group of the dummy's chest skin (i = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10), and j represents the impact position (j = 1, 2, 3, 4).

[0092] S660. Determine the calibration range of the current set position based on the buffer coefficient corresponding to the current set position and the standard deviation corresponding to the current set position.

[0093] The calibration ranges for different impact positions are as follows: D1 = 0.75 ± 0.03, D2 = 0.68 ± 0.02, D3 = 0.53 ± 0.04, D4 = 0.53 ± 0.02.

[0094] where the current dummy's chest skin is any one of the multiple different dummy's chest skins, and the current set position is any one of the multiple set positions. The calibration range is used to determine the performance of the dummy's chest skin to be tested.

[0095] Further, the method further includes:

[0096] Determine the performance score of the chest skin of the dummy to be tested based on the impact weights respectively corresponding to each of the multiple set positions, the average buffer coefficient respectively corresponding to each set position, the standard deviation respectively corresponding to each set position, and the average buffer coefficient corresponding to each of the set positions of the chest skin of the dummy to be tested. For example, determine the performance score T of the chest skin of the dummy to be tested according to the above formula (2). Determine the performance level of the chest skin of the dummy to be tested according to the performance score.

[0097] Further, the method further includes:

[0098] Determine whether the chest skin of the dummy to be tested is qualified according to the calibration range of each of the set positions and the buffer coefficient corresponding to each of the set positions of the chest skin of the dummy to be tested. For example, if the buffer coefficients corresponding to the four impact positions of the chest skin of the dummy to be tested all fall within the calibration range of the corresponding positions, it can be determined that the chest skin of the dummy to be tested is qualified. Or, if the buffer coefficients corresponding to most (for example, three-quarters of the total number of impact positions) of the impact positions of the chest skin of the dummy to be tested all fall within the calibration range of the corresponding positions, it can be determined that the chest skin of the dummy to be tested is qualified.

[0099] This embodiment has the following technical effects:

[0100] The calibration device provided by the embodiment of the present invention can effectively realize the calibration of the chest vest skin, and at the same time, the corresponding calibration method can accurately judge the quality of the chest vest skin performance, thereby further improving the consistency of the responses of different dummy chest assemblies when being impacted, and further improving the accuracy of the collision test results.

[0101] Figure 7 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. As Figure 7 shown, the electronic device 400 includes one or more processors 401 and a memory 402.

[0102] The processor 401 may be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 400 to perform desired functions.

[0103] The memory 402 may include one or more computer program products, and the computer program products may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage media, and the processor 401 may run the program instructions to implement the collision dummy chest skin calibration method of any embodiment of the present invention described above and / or other desired functions. Various contents such as initial external parameters, thresholds, etc. may also be stored in the computer-readable storage media.

[0104] In one example, the electronic device 400 may further include: an input device 403 and an output device 404, and these components are interconnected through a bus system and / or other forms of connection mechanisms (not shown). The input device 403 may include, for example, a keyboard, a mouse, etc. The output device 404 may output various information to the outside, including warning prompt information, braking force, etc. The output device 404 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0105] Of course, for simplicity, Figure 7 only some of the components related to the present invention in the electronic device 400 are shown, and components such as buses, input / output interfaces, etc. are omitted. In addition, according to specific application scenarios, the electronic device 400 may further include any other appropriate components.

[0106] In addition to the above methods and devices, an embodiment of the present invention may also be a computer program product, which includes computer program instructions, and when the computer program instructions are run by a processor, the processor is caused to execute the steps of the collision dummy chest skin calibration method provided by any embodiment of the present invention.

[0107] The computer program product may be written in any combination of one or more programming languages to write program code for performing the operations of the embodiments of the present invention. The programming languages include object-oriented programming languages, such as Java, C++, etc., and also include conventional procedural programming languages, such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's device, executed as an independent software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0108] In addition, an embodiment of the present invention may also be a computer-readable storage medium storing computer program instructions, which, when run by a processor, cause the processor to execute the steps of the collision dummy chest skin calibration method provided by any embodiment of the present invention.

[0109] The computer-readable storage medium may adopt any combination of one or more readable media. The readable media may be a readable signal medium or a readable storage medium. The readable storage medium may, for example, include but not be limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0110] It should be noted that the terms used in the present invention are only for describing specific embodiments and do not limit the scope of the present application. As shown in the specification and claims of the present invention, unless the context clearly indicates an exception, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. The term "comprising", "including", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, or device including the said element.

[0111] It should also be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. Unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A method for calibrating the chest skin of a crash dummy, which is carried out based on a calibration device for the chest skin of a crash dummy, is characterized in that The chest skin calibration device for a crash dummy includes: a support device; a chest skin fixing device, a pendulum positioning device, and a pendulum control device provided on the support device; and a movable pendulum connected to the pendulum control device. An acceleration sensor is installed on the non-impact end of the movable pendulum. The acceleration sensor is used to detect the chest compression displacement when the movable pendulum impacts the chest skin of the dummy. The target position is the position where the movable pendulum impacts the chest skin of the dummy. The chest skin fixing device includes a pressure sensor for detecting the chest compression force when the movable pendulum impacts the chest skin of the dummy. The method for calibrating the chest skin of a crash dummy includes: For each set position among multiple set positions of each dummy chest skin in multiple different dummy chest skins, an impact test at a set speed is respectively carried out by the movable pendulum. When carrying out the impact test at the set speed, the chest compression displacement of each set position of each dummy chest skin is respectively obtained through the acceleration sensor, and the chest compression force of each set position of each dummy chest skin is obtained through the pressure sensor. For each set position of each dummy chest skin, a first curve of the chest compression displacement and the chest compression force corresponding to the current set position of the current dummy chest skin is drawn based on the chest compression displacement and the chest compression force of the current set position of the current dummy chest skin, and a buffer coefficient corresponding to the current set position of the current dummy chest skin is determined according to the first curve. Based on the buffer coefficients respectively corresponding to the current set positions of each dummy chest skin, a buffer coefficient average value corresponding to the current set position is determined. Based on the buffer coefficient average value corresponding to the current set position and the buffer coefficients respectively corresponding to the set positions of each dummy chest skin, a standard deviation corresponding to the current set position is determined. Based on the buffer coefficient corresponding to the current set position and the standard deviation corresponding to the current set position, a calibration range of the current set position is determined. Wherein, the current dummy chest skin is any one of the multiple different dummy chest skins, and the current set position is any one of the multiple set positions. Based on the impact weights respectively corresponding to the set positions among the multiple set positions, the buffer coefficient average values respectively corresponding to the set positions, the standard deviations respectively corresponding to the set positions, and the buffer coefficient average values corresponding to the set positions of the chest skin of the dummy to be tested, the performance score of the chest skin of the dummy to be tested is determined. According to the performance score, the performance level of the chest skin of the dummy to be tested is determined.

2. The calibration method according to claim 1, wherein It further includes: According to the calibration range of each set position and the buffer coefficients corresponding to the set positions of the chest skin of the dummy to be tested, it is determined whether the chest skin of the dummy to be tested is qualified.

3. The calibration method according to claim 1, characterized in that The support device is used to carry the chest skin fixing device, the pendulum positioning device, and the pendulum control device. The chest skin fixing device is used to fix the chest skin of the dummy to the target position of the calibration device. The pendulum blocking device cooperates with the movable pendulum to limit the movement of the movable pendulum after the movable pendulum first impacts the dummy's chest skin, preventing the movable pendulum from making a second impact on the dummy's chest skin; The pendulum control device is used to adjust the position where the movable pendulum impacts the dummy's chest skin; The pendulum blocking device includes: two rod-shaped objects installed on the support device, and the movable pendulum passes through the space between the two rod-shaped objects to impact the dummy's chest skin; The movable pendulum includes a limiting structure. When impacting the dummy's chest skin, the limiting structure automatically pops out, and the popped-out limiting structure cooperates with the two rod-shaped objects to limit the movement of the movable pendulum, preventing the movable pendulum from making a second impact on the dummy's chest skin.

4. The calibration method according to claim 3, wherein The two rod-shaped objects are connected to the support device through a sliding groove, and the distance between the two rod-shaped objects and the dummy's chest is changed through the sliding groove.

5. The calibration method according to claim 1, wherein The pendulum control device includes a pendulum control line and a pendulum height adjustment line. The pendulum height adjustment line is a non-elastic line used to adjust the release height of the movable pendulum to adjust the position where the movable pendulum impacts the dummy's chest skin; The pendulum control line is used to suspend the movable pendulum on the support device, and the pendulum height adjustment line is connected to the pendulum control line through a locking ring structure.

6. The calibration method according to claim 1, wherein, The chest skin fixing device includes: a support spine and contoured ribs; The pressure sensor is arranged in the space between the contoured ribs and the support spine.

7. An electronic device, characterized in that, The electronic device includes: a processor and a memory; The processor is used to execute the steps of the method for calibrating the collision of the dummy's chest skin according to any one of claims 1 to 6 by calling the program or instruction stored in the memory.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instruction, and the program or instruction causes a computer to execute the steps of the method for calibrating the collision of the dummy's chest skin according to any one of claims 1 to 6.

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