A method for placing a large inclination lying posture dummy

Abstract

A method for placing a large-inclination lying posture dummy, S1: obtaining the backrest angle, cushion angle coordinates and H point coordinate average under the target position of the test seat; S2: keeping the included angle between the backrest and the cushion unchanged, rotating the test seat around the first mark point until the cushion angle of the test seat reaches the preset angle and defining the posture as the cushion angle standard position posture; S3: obtaining the backrest angle and the second mark point coordinates under the cushion angle standard position posture, and calculating the reference pelvis angle of the cushion angle standard position posture; S4: calculating the rotation angle difference of the cushion angle standard position posture and the target position reference pelvis angle; S5: keeping the included angle between the backrest and the cushion unchanged, rotating the test seat around the first mark point until the second mark point, the backrest angle and the cushion angle return to the target position; S6: calculating the target pelvis angle of the dummy; S7: placing the dummy on the test seat. The method solves the problems of error and inaccurate evaluation of the automobile safety evaluation data of the large-inclination lying posture dummy.

Description

Technical Field

[0001] The invention belongs to the field of automobile safety experiments, and in particular relates to a method for placing a lying dummy at a large inclination angle. Background Art

[0002] Crash dummies are widely used in automotive safety standards worldwide. Different characteristics of these dummies are tailored to meet safety regulations for different testing conditions. Current automotive safety standards primarily address occupant safety in the normal seating position, with the seatback reclined at approximately 25°. Accordingly, these standards position the crash dummies in the normal seating position. For example, the current standard GB11551-2014, "Occupant Protection in Frontal Impacts of Motor Vehicles," requires the front seatbacks to be adjusted to their normal use angle or tilted 25° rearward from the vertical, and then positioned using dummies meeting the 50% Hybrid III technical requirements. Other current standards, such as GB20071-2006, "Occupant Protection in Side Impacts of Motor Vehicles," GB / T20913-2007, "Occupant Protection in Frontal Offset Impacts of Passenger Cars," and GB / T37337-2019, "Occupant Protection in Side Pole Impacts of Motor Vehicles," all target the crash dummies at their normal use angle, tilted approximately 25° rearward from the vertical.

[0003] With the continuous advancement of automotive technology, especially the development of autonomous driving and intelligent cockpits, the seating posture of vehicle occupants is expected to become more diverse, no longer limited to the traditional upright position. Instead, the occupant's sitting position may gradually evolve from a normal sitting position to a reclining or semi-reclining position, with the seatback angle greater than 25°. With this change in sitting posture, the force distribution and movement patterns of various parts of the human body will change significantly. The crash dummy placement method used in vehicle occupant safety standards for a normal sitting position is not suitable for this non-traditional seating position, resulting in errors in vehicle safety evaluation data and inaccurate assessments. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a method for placing a lying dummy at a large tilt angle, so as to solve the problem of errors and inaccurate evaluation of automobile safety evaluation data of a lying dummy at a large tilt angle.

[0005] The basic solution provided by the present invention is a method for placing a lying dummy at a large inclination angle, which specifically includes the following steps:

[0006] S1: Determine the target position, place the test seat at the target position, and obtain the current backrest angle, seat cushion angle, and the average coordinates of the H points on the left and right sides of the test seat;

[0007] S2: determine the first mark point, the second mark point, and record the coordinates of the two mark points under the target position, keep the angle between the backrest and the cushion unchanged, rotate the test seat around the Y axis of the first mark point until the cushion angle of the test seat reaches the preset angle, define the posture of the test seat at this time as the cushion angle standard position posture;

[0008] S3: obtain the backrest angle and the second mark point coordinates under the cushion angle standard position posture, calculate the reference pelvis angle of the cushion angle standard position posture according to the backrest angle under the cushion angle standard position posture;

[0009] S4: calculate the rotation angle difference of the cushion angle standard position posture according to the coordinates of the first mark point and the second mark point under the target position, and the coordinates of the second mark point under the cushion angle standard position posture, and calculate the target position reference pelvis angle according to the rotation angle difference and the reference pelvis angle of the cushion angle standard position posture;

[0010] S5: keep the angle between the backrest and the cushion unchanged, rotate the test seat around the first mark point until the second mark point, the backrest angle, and the cushion angle also return to the coordinates under the target position;

[0011] S6: calculate the dummy target pelvis angle according to the target position reference pelvis angle;

[0012] S7: place the dummy on the test seat according to the test requirement.

[0013] The principle and advantages of the present application are that the target position is determined, the H point average coordinates are calculated, two mark points are set, the cushion angle standard position posture is determined according to the preset angle of the cushion angle, the mark point coordinates and the backrest angle are recorded respectively, the reference pelvis angle of the cushion angle standard position posture is calculated using the backrest angle under the cushion angle standard position posture, and then the rotation angle difference of the cushion angle standard position posture and the target position reference pelvis angle are calculated, the test seat is adjusted from the cushion angle standard position posture to the target position, and the dummy target pelvis angle is calculated, and the dummy is placed according to the calculated H point average coordinates and target pelvis angle;

[0014] The dummy is placed according to the H point average coordinates and the target pelvis angle, various factors such as the backrest angle, the cushion angle, the mark point coordinates, and the dummy physical parameters are fully considered in the process, and the dummy target pelvis angle is accurately determined through multiple angle calculations and rotation adjustments, so as to ensure the accuracy of the placement position of the dummy under the large inclination lying posture, and improve the accuracy of related test data;

[0015] The target position and other basic parameters are determined according to the production data of the manufacturer, and then the calculation is gradually derived, and finally the dummy is placed, the whole process is logically coherent, and a scientific and reasonable method for placing the dummy under the large inclination lying posture is provided;

[0016] This placement method has clear step-by-step instructions. From determining the seat position to the final placement of the dummy, each step has clear operational requirements and goals, which makes it easier for operators to follow and reduce operational errors.

[0017] Preferably, in step S3, the calculation formula of the standard position posture of the seat cushion angle with reference to the pelvic angle is as follows:

[0018]

[0019] Where, PA SP BA is the standard position of the seat angle and the reference pelvic angle. SP is the backrest angle for the standard seat cushion angle position, W is the dummy's weight, and H is the dummy's standing height. Calculating the reference pelvic angle using a mathematical model allows for a more accurate determination of the ideal pelvic angle for dummy placement. Compared to relying on experience or intuitive judgment, using a calculation formula provides more precise results and ensures consistency in each experimental setup, improving repeatability and data reliability. This method of determining the reference pelvic angle for the standard seat cushion angle position using a calculation formula based on the backrest angle not only improves experimental accuracy and efficiency but also provides important technical support for product design and safety assessments.

[0020] Preferably, in step S4, the calculation formula of the rotation angle difference of the standard position posture of the seat cushion angle is as follows:

[0021]

[0022] Where, Angle D is the angle difference of the standard position of the seat cushion angle, X SC is the X coordinate of the first marker point under the target position, X BP is the X coordinate of the second marker point under the target position, X BP0 is the X coordinate of the second mark point in the standard position of the cushion angle, Z SC is the Z coordinate of the first marker point under the target position, Z BP is the Z coordinate of the second marker point under the target position, Z BP0 The Z coordinate of the second landmark point in the standard seat angle position is used to calculate the angle difference. This calculation combines the coordinates of the first and second landmark points in the target position with the coordinates of the second landmark point in the standard seat angle position. This cross-verification of multiple coordinate data reduces the impact of single-data measurement errors on the results, ensuring the accuracy of the angle difference calculation. Accurate angle difference and the reference pelvic angle in the standard seat angle position are key to calculating the reference pelvic angle in the target position. This precise calculation based on actual position coordinates provides a reliable foundation for subsequent calculations of the reference pelvic angle in the target position, making the entire calculation process more rigorous and scientific.

[0023] Preferably, in step S4, the target position reference pelvic angle is calculated using the following formula:

[0024] PA TP =PA SP +Angle D

[0025] Where, PA TP The reference pelvic angle for the target position, PA SP Angle is the standard position of the seat angle and the reference pelvic angle. D The angular difference between the standard seat cushion angle and the standard pelvic angle is crucial for determining the correct positioning of the dummy in the high-angle reclining position. This ensures that the dummy's posture more closely matches the test requirements, maximizing the simulation of real-world scenarios and thereby improving the reliability and validity of the test data. This calculation step facilitates the accurate calculation of the target reference pelvic angle throughout the high-angle reclining dummy placement process, enhancing the systematicity and rationality of the method.

[0026] Preferably, in step S6, the calculation formula of the dummy target pelvic angle is as follows:

[0027] PA DTP =PA TP -δ

[0028] Where, PA DTP Target pelvic angle for the dummy, PA TP is the target position reference pelvic angle, and δ is the difference in dummy spatial structural angle between the target pelvic angle and the target position reference pelvic angle. The target position reference pelvic angle is precisely calculated based on the test seat's parameters and actual position coordinates. Using this as a basis for calculating the dummy's target pelvic angle closely matches the dummy's actual placement requirements in a reclining position, ensuring the dummy's posture on the test seat is highly consistent with actual application scenarios and meeting the stringent requirements for dummy placement in various tests. Calculating the dummy's posture using the target position reference pelvic angle effectively reduces dummy placement errors, ensuring that the dummy's forces and movements during the test are more realistic, thereby improving the accuracy and reliability of test data and providing strong data support for related research and analysis. Furthermore, this method of determining the dummy's target pelvic angle based on precise calculations significantly reduces errors caused by human factors, improves the consistency and stability of dummy placement, and ensures accurate and repeatable dummy placement across each test, compared to methods based on experience or simple estimates.

[0029] Preferably, in step S7, the dummy placement steps are as follows:

[0030] S7-1) Place the dummy in the test seat so that the mean coordinates of the dummy's H-point and the pelvic angle meet the test requirements;

[0031] S7-2) Adjust the dummy's torso and limbs so that the dummy's arms are close to the torso and the hands rest naturally on the seat armrests. If there are no armrests, keep the palms naturally against the thighs. Extend the legs forward and lower them naturally, keeping the thigh and calf on the same side in the same vertical plane, naturally fitting the seat cushion and leg support of the high-recline seat. Keep the feet naturally suspended in the air, with the longitudinal centerline of the feet parallel to the longitudinal centerline of the vehicle.

[0032] S7-3) Check again whether the coordinate mean of the dummy's H point and the pelvic angle meet the test requirements. If not, return to S7-2) and continue adjusting the dummy's posture. If so, the lying dummy placement is completed.

[0033] In S7-1), the dummy is initially positioned on the test seat according to the test requirements, facilitating subsequent gradual adjustments to the dummy's posture. In S7-2), the dummy's torso and limbs are carefully adjusted to restore the natural state of the human body in a reclining position at a large angle, making the dummy's posture more consistent with actual application scenarios, improving the authenticity and reliability of the test, and laying the foundation for obtaining more valuable test data. In S7-3), the test requirements are checked again to form a closed-loop quality control system. If the mean coordinate value of the dummy's H point and the pelvic angle do not meet the requirements, return to the previous step to continue adjustments, ensuring that the final dummy's posture fully meets the test standards, effectively reducing test errors caused by posture problems, and improving the accuracy and credibility of the test results.

[0034] Preferably, the test requirements include:

[0035] a. The mean value of the H point coordinates on the left and right sides of the dummy and the coordinates (X hp -20mm, Z hp +20mm) TP The error is within 13mm, X hp is the mean X coordinate of the H points on the left and right sides of the target position, Z hp is the mean Z coordinate of the H points on the left and right sides of the target position;

[0036] b. The dummy's pelvic angle is within the range of ±3° of the target pelvic angle;

[0037] c. The angles of the dummy's head, lumbar spine, and pelvis relative to the X-axis are all within the range of 0°±1°.

[0038] The test requirements stipulate that the mean H-point coordinates and pelvic angles of the dummy must be within specified error limits relative to the calculated values, as well as the angles of the dummy's head, lumbar spine, and pelvic angles relative to the X-axis. This maximizes the simulation of the human body's true physiological state in a reclining position at a high angle, improving the authenticity and reliability of the test and thereby obtaining test data that more closely reflects actual conditions. For example, Test Requirement a limits the error in the mean H-point coordinates of the dummy's left and right sides to within 13mm. This ensures highly accurate horizontal and vertical positioning of the dummy on the seat, ensuring its stability during the test and providing a precise foundation for subsequent test data collection, reducing data errors caused by positional deviations and making the test results more convincing. Test Requirement b limits the range of the dummy's pelvic angles, while Test Requirement c limits the angles of the dummy's head, lumbar spine, and pelvic angles relative to the X-axis. This ensures that the dummy's posture is consistent with the target posture within a very small error range, ensuring highly consistent conditions for each test. This series of precise, quantitative requirements establishes a rigorous test standard system. When placing the dummies, adjustments and checks are strictly carried out in accordance with these requirements, which avoids human arbitrariness, improves the standardization and scientific nature of the test, and facilitates comparison and verification between different tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a flow chart of the present invention;

[0040] Figure 2 This is a diagram showing the coordination between the dummy and the test seat of the present invention;

[0041] Figure 3 This is a schematic diagram of dummy-related parameters of the present invention;

[0042] Figure 4 Schematic diagram of the pelvic angle parameters of the dummy of the present invention. DETAILED DESCRIPTION

[0043] The following is further described in detail through specific implementation methods:

[0044] The specific implementation process is as follows: Figures 1 to 4 A method for placing a lying dummy at a large inclination angle specifically comprises the following steps:

[0045] S1: Determine the target position based on the high-angle seat production data provided by the manufacturer. Place the test seat at the target position according to the "H-point and R-point Determination Procedure" in GB / T29120-2012 and the HPM placement procedure in SAEJ4002. Obtain the current backrest angle, seat cushion angle, and the average coordinates of the left and right H points of the test seat (X hp , Z hp ) TP ;

[0046] The coordinate mean of the H point is calculated as follows:

[0047] X hp =0.5*(X hp-l +X hp-r )

[0048] Z hp =0.5*(Z hp-l +Z hp-r )

[0049] Where, X hp is the mean X coordinate of point H, Z hp is the mean Z coordinate of point H, X hp-l is the X coordinate of point H on the left side of the test seat, Z hp-l is the Z coordinate of point H on the left side of the test seat, X hp-l is the X coordinate of point H on the right side of the test seat, X hp-l is the Z coordinate of point H on the right side of the test seat.

[0050] In this embodiment, the average coordinate value of point H is (760.16, 510.23), the backrest angle at the target position is 38.00°, and the seat cushion angle is 17.70°.

[0051] S2: Determine the first marker point and the second marker point, and record the coordinates of the two marker points at the target position. The coordinates of the first marker point are (X SC , Z SC ) TP , the coordinates of the second marker point are (X BP , Z BP ) TP , keep the angle between the backrest angle and the cushion angle unchanged, and move the test seat around the first mark point (X SC , Z SC ) TP The Y-axis is rotated until the cushion angle of the test seat reaches a preset angle, and the test seat posture at this time is defined as the standard position posture of the cushion angle; during the rotation, the coordinates of the first mark point and the second mark point are detected by an instrument of three-dimensional space coordinates.

[0052] In step S2, the preset angle is 13.5° to 15.5°. In this embodiment, the preset angle is preferably 14.5°. In step S2, the first landmark point is the intersection of the test seat's backrest and seat cushion, i.e., the rotation center when the seat rotates while maintaining the angle between the backrest and seat cushion. The second landmark point is located on the edge of the test seat's backrest. In this embodiment, the angle between the backrest and seat cushion is 110.3°. The coordinates of the first landmark point at the target position are (872.46, 329.51), and the coordinates of the second landmark point are (1037.25, 743.48).

[0053] S3: Obtaining the backrest angle and the coordinates of the second landmark point in the standard seat cushion angle position, and calculating the reference pelvic angle of the standard seat cushion angle position according to the backrest angle in the standard seat cushion angle position;

[0054] In step S3, the calculation formula of the standard position posture of the seat cushion angle reference pelvic angle is as follows:

[0055]

[0056] Where, PA SP BA is the standard position of the seat angle and the reference pelvic angle. SP is the backrest angle in the standard seat cushion angle position, W is the dummy's weight, and H is the dummy's standing height. In this embodiment, the dummy's weight W is 76.6 kg, and her standing height is 1.75 m. The backrest angle in the standard seat cushion angle position is 34°. The coordinates of the second landmark are (1021.72, 749.32), and the reference pelvic angle in the standard seat cushion angle position is 62.07°.

[0057] S4: Calculating the rotation angle difference of the standard seat cushion angle position according to the coordinates of the first and second marker points at the target position and the coordinates of the second marker point at the standard seat cushion angle position, and calculating the target position reference pelvic angle according to the rotation angle difference and the reference pelvic angle of the standard seat cushion angle position;

[0058] In step S4, the calculation formula of the angle difference of the standard position of the seat cushion angle is as follows:

[0059]

[0060] Where, Angle D is the angle difference of the standard position of the seat cushion angle, X SC is the X coordinate of the first marker point under the target position, X BP is the X coordinate of the second marker point under the target position, X BP0 is the X coordinate of the second mark point in the standard position of the cushion angle, Z SC is the Z coordinate of the first marker point under the target position, Z BP is the Z coordinate of the second marker point under the target position, Z BP0 It is the Z coordinate of the second marker point in the standard position of the seat cushion angle.

[0061] In step S4, the target position reference pelvic angle is calculated as follows:

[0062] PA TP =PA SP +Angle D

[0063] Where, PA TP The reference pelvic angle for the target position, PA SP Angle is the standard position of the seat angle and the reference pelvic angle. D It is the angular difference of the standard position of the seat cushion.

[0064] In this embodiment, the rotation angle difference is 2.13°, and the target position reference pelvic angle is 64.20°.

[0065] S5: Keeping the angle between the backrest and the seat cushion unchanged, rotate the test seat around the first mark point until the second mark point, the backrest angle, and the seat cushion angle also return to the coordinates of the target position. During the rotation, use a three-dimensional space coordinate instrument to detect the coordinates of the mark point;

[0066] S6: Calculate the dummy's target pelvic angle based on the target position reference pelvic angle;

[0067] In step S6, the calculation formula of the dummy target pelvic angle is as follows:

[0068] PA DTP =PA TP -δ

[0069] Where, PA DTP Target pelvic angle for the dummy, PA TP is the reference pelvic angle at the target position, and δ is the dummy spatial structure angle difference between the dummy target pelvic angle and the reference pelvic angle at the target position.

[0070] In this embodiment, the target pelvic angle of the dummy is 39.20°, and δ is 25.00°.

[0071] like Figure 4 As shown, the target position is referenced to the pelvic angle PA TP The angle between the projection of the line connecting the “center coordinates of the two H points” to the “center point of the interface between the lumbar vertebra L5 and the sacrum S1” on the XZ plane and the Z axis; and the dummy’s target pelvic angle PA DTP The pelvic angle of the dummy used in the test. An angle sensor is usually set on this plane to directly read the pelvic reading; δ is the target pelvic angle PA of the dummy DTP Reference pelvic angle PA with target position TP The angle difference between the dummies' spatial structures is an inherent value.

[0072] S7: Place the dummy on the test seat according to the dummy placement test requirements.

[0073] In step S7, the steps for placing the dummy are as follows:

[0074] S7-1) Place the dummy in the test seat so that the mean coordinates of the dummy's H-point and the pelvic angle meet the test requirements;

[0075] S7-2) Adjust the dummy's torso and limbs so that the dummy's arms are close to the torso and the hands rest naturally on the seat armrests. If there are no armrests, keep the palms naturally against the thighs. Extend the legs forward and lower them naturally, keeping the thigh and calf on the same side in the same vertical plane, naturally fitting the seat cushion and leg support of the high-recline seat. Keep the feet naturally suspended in the air, with the longitudinal centerline of the feet parallel to the longitudinal centerline of the vehicle.

[0076] S7-3) Check again whether the coordinate mean of the dummy's H point and the pelvic angle meet the test requirements. If not, return to S7-2) and continue adjusting the dummy's posture. If so, the lying dummy placement is completed.

[0077] Test requirements include:

[0078] a. The mean value of the H point coordinates on the left and right sides of the dummy and the coordinates (X hp -20mm, Z hp +20mm) TP The error is within 13mm, X hp is the mean X coordinate of the H points on the left and right sides of the target position, Z hp is the average Z coordinate of the H points on the left and right sides of the target position; in this embodiment, the average coordinate of the H point of the dummy is (736.32, 537.63), which is within the specified error range when compared with the coordinates (760.16-20, 510.23+20);

[0079] b. The dummy's pelvic angle is within the range of ±3° of the target pelvic angle. In this embodiment, the dummy's final pelvic angle is 40.20°, which is within the specified error range compared to the calculated target pelvic angle of 39.20°.

[0080] c. The angles of the dummy's head, lumbar spine, and pelvis relative to the X-axis are all within the range of 0°±1°, which is within the range in this embodiment.

[0081] The above is only an embodiment of the present application, and the common knowledge of specific structures and characteristics in the scheme is not described in detail, and the ordinary skilled person in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply conventional experimental means before that date, and the ordinary skilled person in the art can improve and implement the present scheme under the guidance of the present application, and some typical known structures or known methods should not be an obstacle for the ordinary skilled person in the art to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the patent. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A method for placing a lying dummy at a large inclination angle, characterized in that: The specific steps include: S1: Determine the target position, place the test seat at the target position, and obtain the current backrest angle, seat cushion angle, and the average coordinates of the H points on the left and right sides of the test seat; S2: Determine the first and second marker points, and record the coordinates of the two marker points at the target position. Keeping the angle between the backrest and the seat cushion unchanged, rotate the test seat around the Y-axis of the first marker point until the seat cushion angle of the test seat reaches the preset angle. Define the test seat posture at this time as the standard seat cushion angle position posture; S3: Obtaining the backrest angle and the coordinates of the second landmark point in the standard seat cushion angle position, and calculating the reference pelvic angle of the standard seat cushion angle position according to the backrest angle in the standard seat cushion angle position; S4: Calculating the rotation angle difference of the standard seat cushion angle position according to the coordinates of the first and second marker points at the target position and the coordinates of the second marker point at the standard seat cushion angle position, and calculating the target position reference pelvic angle according to the rotation angle difference and the reference pelvic angle of the standard seat cushion angle position; S5: Keeping the angle between the backrest and the seat cushion unchanged, rotate the test seat around the first mark point until the second mark point, the backrest angle, and the seat cushion angle also return to the coordinates of the target position; S6: Calculate the dummy's target pelvic angle based on the target position reference pelvic angle; S7: Place the dummy on the test seat in accordance with the dummy placement test requirements so that the mean coordinate value of the dummy's H point and the pelvic angle meet the test requirements.

2. The method for placing a lying dummy at a large inclination angle according to claim 1, characterized in that: In step S2, the preset angle is 13.5° to 15.5°.

3. The method for placing a lying dummy at a large inclination angle according to claim 2, characterized in that: In step S2 , the preset angle is 14.5°.

4. The method for placing a lying dummy at a large inclination angle according to claim 1, characterized in that: In step S2, the first marking point is the intersection of the backrest and the seat cushion of the test seat, and the second marking point is located on one side of the edge of the backrest of the test seat.

5. The method for placing a lying dummy at a large inclination angle according to claim 1, characterized in that: In step S3, the calculation formula of the standard position posture of the seat cushion angle reference pelvic angle is as follows: Where, The standard position of the seat angle is based on the pelvic angle. is the backrest angle in the standard position of the seat cushion angle, W is the weight of the dummy, and H is the standing height of the dummy.

6. The method for placing a lying dummy at a large inclination angle according to claim 1, characterized in that: In step S4, the calculation formula of the angle difference of the standard position of the seat cushion angle is as follows: Where, is the angle difference of the standard position of the seat cushion angle, is the X coordinate of the first marker point under the target position, is the X coordinate of the second marker point under the target position, is the X coordinate of the second marker point in the standard position of the seat cushion angle, is the Z coordinate of the first marker point under the target position, is the Z coordinate of the second marker point under the target position, It is the Z coordinate of the second marker point in the standard position of the seat cushion angle.

7. The method for placing a lying dummy at a large inclination angle according to claim 1, characterized in that: In step S4, the target position reference pelvic angle is calculated as follows: Where, is the reference pelvic angle for the target position, The standard position of the seat angle is based on the pelvic angle. It is the angular difference of the standard position of the seat cushion.

8. The method for placing a lying dummy at a large inclination angle according to claim 1, characterized in that: In step S6, the calculation formula of the dummy target pelvic angle is as follows: Where, is the target pelvic angle of the dummy, is the reference pelvic angle for the target position, It is the dummy spatial structure angle difference between the dummy target pelvic angle and the target position reference pelvic angle.

9. The method for placing a lying dummy at a large inclination angle according to claim 1, characterized in that: In step S7, the steps for placing the dummy are as follows: S7-1) Place the dummy in the test seat so that the mean coordinates of the dummy's H-point and the pelvic angle meet the test requirements; S7-2) Adjust the dummy's torso and limbs so that the dummy's arms are close to the torso and the hands rest naturally on the seat armrests. If there are no armrests, keep the palms naturally against the thighs. Extend the legs forward and lower them naturally, keeping the thigh and calf on the same side in the same vertical plane, naturally fitting the seat cushion and leg support of the high-recline seat. Keep the feet naturally suspended in the air, with the longitudinal centerline of the feet parallel to the longitudinal centerline of the vehicle. S7-3) Check again whether the coordinate mean of the dummy's H point and the pelvic angle meet the test requirements. If not, return to S7-2) and continue adjusting the dummy's posture. If so, the lying dummy placement is complete.

10. The method for placing a lying dummy at a large inclination angle according to claim 1 or 9, characterized in that: Test requirements include: a. The mean value of the H point coordinates on the left and right sides of the dummy and the coordinates (X hp -20mm, Z hp +20mm) TP The error is within 13mm, X hp is the mean X coordinate of the H points on the left and right sides of the target position, Z hp is the mean Z coordinate of the H points on the left and right sides of the target position; b. The dummy's pelvic angle is within the range of ±3° of the target pelvic angle; c. The angles of the dummy's head, lumbar spine, and pelvis relative to the X-axis are all within the range of 0°±1°.

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