Method for placing dummy in large-dip-angle lying posture

Abstract

The invention discloses a method for placing a dummy in a large-inclination-angle lying posture. The method comprises the steps that S1, a backrest angle coordinate, a cushion angle coordinate and an H-point coordinate mean value of a test seat at a target position are obtained; 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 a preset angle, and defining the posture as a cushion angle standard position posture; s3, acquiring a backrest angle and a second mark point coordinate under a cushion angle standard position posture, and calculating a cushion angle standard position posture reference pelvic angle; s4, calculating a corner difference of a cushion angle standard position posture and a target position reference pelvic angle; s5, keeping the included angle between the backrest and the cushion unchanged, and 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 a dummy target pelvic angle; and S7, placing the dummy on the test seat. The problems that errors exist in automobile safety evaluation data of the dummies in the large-dip-angle lying posture, and evaluation is not accurate are solved.

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 evaluation tools in the current global automotive safety standards. Crash dummies with different characteristics are suitable for safety regulations of different evaluation conditions. The current automotive safety standards are mainly aimed at the safety of occupants in normal sitting positions, that is, the seat back angle is about 25°. Correspondingly, in the standards, the crash dummies are adjusted to a normal sitting position. For example, in the current standard GB11551-2014 "Occupant Protection in Frontal Collisions of Automobiles", the front seat back position is adjusted to the normal use angle or a position tilted 25° backward from the vertical plane, and then a dummy that meets the 50% Hybrid III technical requirements is placed. Other current standards GB20071-2006 "Occupant Protection in Side Collisions of Automobiles", GB / T20913-2007 "Occupant Protection in Frontal Offset Collisions of Passenger Cars", GB / T37337-2019 "Occupant Protection in Side Column Collisions of Automobiles" are all aimed at the collision dummy at a normal use angle, that is, tilted about 25° backward from the vertical plane.

[0003] With the continuous advancement of automobile technology, especially the development of autonomous driving and smart cockpits, the sitting posture of passengers in the car may become more diverse, no longer limited to the traditional upright sitting posture, and the passenger sitting posture may gradually evolve from a normal sitting posture to a lying posture or a semi-lying posture, that is, the seat back tilt angle is greater than 25°. As the sitting posture changes, the force distribution and movement pattern of various parts of the human body will change significantly. The collision dummy placement method used in the automobile occupant safety standard under normal sitting posture cannot be applied to this non-traditional sitting posture, resulting in errors in the automobile safety evaluation data and inaccurate evaluation. Summary of the invention

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

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

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

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

[0008] S3: obtaining a backrest angle and a second marker point coordinate in a standard position of the seat cushion angle, and calculating a reference pelvic angle in a standard position of the seat cushion angle according to the backrest angle in the standard position of the seat cushion angle;

[0009] S4: calculating the rotation angle difference of the standard position of the cushion angle according to the coordinates of the first mark point and the second mark point at the target position and the coordinates of the second mark point at the standard position of the cushion angle, and calculating the reference pelvic angle of the target position according to the rotation angle difference and the reference pelvic angle of the standard position of the cushion angle;

[0010] 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;

[0011] S6: Calculate the dummy's target pelvic angle according to the target position reference pelvic angle;

[0012] S7: Place the dummy on the test seat according to the dummy placement test requirements.

[0013] The principle and advantage of the present invention are: determining the target position, calculating the mean coordinates of the H point, setting two marking points, and determining the standard position and posture of the cushion angle according to the preset angle of the cushion angle, recording the coordinates of the marking points and the backrest angle respectively, calculating the reference pelvic angle of the standard position and posture of the cushion angle by using the backrest angle under the standard position and posture of the cushion angle, and then calculating the rotation angle difference of the standard position and posture of the cushion angle and the reference pelvic angle of the target position, adjusting the test seat from the standard position and posture of the cushion angle back to the target position, and calculating the target pelvic angle of the dummy, and placing the dummy according to the calculated mean coordinates of the H point and the target pelvic angle;

[0014] The dummy is placed according to the mean coordinates of the H point and the target pelvic angle. In the process, multiple factors such as the backrest angle, seat cushion angle, landmark coordinates, and dummy body parameters are fully considered. Through multiple angle calculations and rotation adjustments, the dummy's target pelvic angle can be accurately determined, thereby ensuring the accurate placement of the dummy in a large-angle lying position, which is conducive to improving the accuracy of relevant test data;

[0015] Determine the target position and other basic parameters based on the manufacturer's production data, then gradually deduce and calculate, and finally complete the placement of the dummy. The entire process is logically coherent, providing a scientific and reasonable method for placing a large-angle lying dummy.

[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 is easy for operators to follow and reduces 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 and posture reference pelvic angle of the seat cushion angle. SP is the backrest angle in the standard position of the cushion angle, W is the weight of the dummy, and H is the standing height of the dummy. The reference pelvic angle calculated by the mathematical model can more accurately determine the ideal pelvic angle when the dummy is placed. Compared with experience or intuitive judgment, the use of calculation formulas can provide more accurate results and ensure the consistency of each experimental setting, improving the repeatability of the experimental process and the reliability of the data; the method of determining the reference pelvic angle of the standard position of the cushion angle based on the backrest angle and the calculation formula not only improves the accuracy and efficiency of the experiment, but also provides important technical support for product design and safety evaluation.

[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 It is the Z coordinate of the second mark point in the standard position of the cushion angle. The angle difference is calculated by combining the coordinates of the first and second mark points in the target position and the coordinates of the second mark point in the standard position of the cushion angle. Multiple sets of coordinate data are used for mutual verification to reduce the impact of single data measurement error on the results and ensure the accuracy of the angle difference calculation. The accurate angle difference and the reference pelvic angle in the standard position of the cushion angle are the key to calculating the reference pelvic angle in the target position. This precise calculation based on the actual position coordinates provides a reliable foundation for the subsequent calculation of the reference pelvic angle in the target position, making the entire calculation process more rigorous and scientific.

[0023] Preferably, in step S4, the calculation formula of the target position reference pelvic angle is as follows:

[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 and posture reference pelvic angle of the seat cushion. D is the angular difference of the standard position of the cushion angle. The accurate target position reference pelvic angle is crucial to determine the accurate placement of the dummy in a high-angle lying position. It enables the dummy's posture to better meet the test requirements and simulate the real scene to the greatest extent, thereby improving the reliability and validity of the test data. In the entire high-angle lying dummy placement process, this calculation step facilitates the accurate calculation of the target position reference pelvic angle, enhancing the systematicness 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 dummy spatial structure angle difference between the dummy's target pelvic angle and the target position reference pelvic angle. The target position reference pelvic angle is accurately calculated based on the various parameters of the test seat and the actual position coordinates. The target pelvic angle of the dummy is calculated based on it, which can closely fit the actual placement requirements of the dummy in a large tilt angle lying position, ensure that the dummy's posture on the test seat is highly consistent with the actual application scenario, and meet the strict requirements of various tests for the dummy's placement posture. Calculation based on the target position reference pelvic angle can effectively reduce the dummy placement posture error, make the dummy's force, movement and other conditions during the test closer to the actual situation, and thus improve the accuracy and reliability of the test data, and provide strong data support for related research and analysis. And the use of this method based on the derivation of precise calculation results to determine the dummy's target pelvic angle can significantly reduce the error caused by human factors, improve the consistency and stability of the dummy placement, and ensure the accuracy and repeatability of the dummy placement in each test, compared with the method based on experience or simple estimation.

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

[0030] S7-1) Place the dummy on the test seat so that the coordinate mean 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 are placed naturally on the seat armrests. If there are no armrests, keep the palms naturally in contact with the thighs. Extend the legs forward and lower them naturally, keep the thigh and calf on the same side in the same vertical plane, and naturally fit the seat cushion and leg support of the high-angle seat. The feet are naturally suspended in the air, and the longitudinal centerline of the feet is 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) to continue adjusting the dummy's posture. If yes, the placement of the lying dummy is completed.

[0033] In S7-1), the dummy is initially positioned on the test seat according to the test requirements to facilitate the subsequent gradual adjustment of 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 in line 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), check again whether the test requirements are met to form a closed-loop quality control system. If the mean value of the dummy's H-point coordinates and the pelvic angle do not meet the requirements, return to the previous step to continue adjusting, ensuring that the final dummy's posture fully meets the test standards, effectively reducing the 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 coordinates of the H points 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 pelvic angle of the dummy is within the range of ±3° of the target pelvic angle;

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

[0038] The test requirements stipulate that the mean value of the H-point coordinates of the dummy, the pelvic angle and the calculated value, as well as the head, lumbar spine, pelvic angle and X-axis angle of the dummy are within the specified error range, simulating the real physiological state of the human body in a reclining position at a large angle to the greatest extent, improving the authenticity and reliability of the test, and thus obtaining test data that is closer to the actual situation. For example, in test requirement a, the mean error of the H-point coordinates on the left and right sides of the dummy is limited to 13mm, which makes the horizontal and vertical position of the dummy on the seat highly accurate, ensures the stability of the dummy's position during the test, provides an accurate basis for the collection of subsequent test data, reduces data errors caused by position deviation, and makes the test results more convincing; test requirement b limits the range of the dummy's pelvic angle, and test requirement c limits the dummy's head, lumbar spine, pelvic angle and X-axis angle, ensuring that the dummy's posture is consistent with the target posture within a very small error range, making the conditions of each test highly consistent. This series of precise quantitative requirements has built a rigorous test standard system. When placing the dummies, adjustments and checks are carried out strictly in accordance with these requirements, which avoids human arbitrariness, improves the standardization and scientific nature of the tests, 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 A diagram showing the coordination between a dummy and a test seat of the present invention;

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

[0042] Figure 4 It is a schematic diagram of the pelvic angle parameters of a 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 according to the production data of the high-angle seat 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, and obtain the current backrest angle, seat cushion angle, and the coordinate average of the left and right H points of the test seat through the three-dimensional H-point device-II (HPM-II) hp , Z hp ) TP ;

[0046] The coordinate mean value calculation method of the H point is 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] In the formula, 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 coordinate mean 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 mark point and the second mark point, and record the coordinates of the two mark points at the target position. The coordinates of the first mark 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 test seat is rotated along the Y-axis 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 mark point is the intersection of the backrest and the seat cushion of the test seat, that is, the rotation center of the seat when the seat keeps the angle between the backrest and the seat cushion unchanged for overall rotation. The second mark point is located on one side of the edge of the backrest of the test seat. In this embodiment, the angle between the backrest angle and the seat cushion angle is 110.3°. The coordinates of the first mark point at the target position are (872.46.329.51), and the coordinates of the second mark point are (1037.25, 743.48).

[0053] S3: obtaining a backrest angle and a second marker point coordinate in a standard position of the seat cushion angle, and calculating a reference pelvic angle in a standard position of the seat cushion angle according to the backrest angle in the standard position of the seat cushion angle;

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

[0055]

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

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

[0058] In step S4, the calculation formula of the rotation angle difference of the standard position posture 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 mark point in the standard position of the seat cushion angle.

[0061] In step S4, the calculation formula of the target position reference pelvic angle is 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 and posture reference pelvic angle of the seat cushion. 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: Keep the angle between the backrest and the seat cushion unchanged, and 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, and detect the coordinates of the mark point by a three-dimensional space coordinate instrument during the rotation;

[0066] S6: Calculate the dummy's target pelvic angle according to 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 of the target position, and δ is the dummy spatial structure angle difference between the dummy target pelvic angle and the reference pelvic angle of 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 refers 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 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 of the dummy space structure between them 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 of placing the dummy are as follows:

[0074] S7-1) Place the dummy on the test seat so that the coordinate mean 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 are placed naturally on the seat armrests. If there are no armrests, keep the palms naturally in contact with the thighs. Extend the legs forward and lower them naturally, keep the thigh and calf on the same side in the same vertical plane, and naturally fit the seat cushion and leg support of the high-angle seat. The feet are naturally suspended in the air, and the longitudinal centerline of the feet is 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) to continue adjusting the dummy's posture. If yes, the placement of the lying dummy is completed.

[0077] The test requirements include:

[0078] a. The mean value of the coordinates of the H points 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; in this embodiment, the mean coordinate of the H point where the dummy is finally placed is (736.32, 537.63), which is within the specified error range compared with the coordinates (760.16-20, 510.23+20);

[0079] b. The pelvic angle of the dummy is within the range of ±3° of the target pelvic angle. In this embodiment, the pelvic angle of the dummy is finally placed at 40.20°, which is within the specified error range compared with the calculated target pelvic angle of 39.20°;

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

[0081] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret 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, cushion angle, and coordinate average of the H points on the left and right sides of the test seat; S2: Determine the first mark point and the second mark point, and record the coordinates of the two mark points at the target position, keep the angle between the backrest and the seat cushion unchanged, rotate the test seat around the Y axis of the first mark point until the seat cushion angle of the test seat reaches a preset angle, and define the test seat posture at this time as the standard position posture of the seat cushion angle; S3: obtaining a backrest angle and a second marker point coordinate in a standard position of the seat cushion angle, and calculating a reference pelvic angle in a standard position of the seat cushion angle according to the backrest angle in the standard position of the seat cushion angle; S4: calculating the rotation angle difference of the standard position of the cushion angle according to the coordinates of the first mark point and the second mark point at the target position and the coordinates of the second mark point at the standard position of the cushion angle, and calculating the reference pelvic angle of the target position according to the rotation angle difference and the reference pelvic angle of the standard position of the cushion angle; 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 according to the target position reference pelvic angle; S7: Place the dummy on the test seat according to the dummy placement 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 and posture of the seat cushion angle with reference to the pelvic angle is as follows: Where, PA SP BA is the standard position and posture reference pelvic angle of the seat cushion angle. SP is the backrest angle in the standard position of the 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 rotation angle difference of the standard position posture of the seat cushion angle is as follows: 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 mark 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 calculation formula of the target position reference pelvic angle is as follows: PA TP =PA SP +Angle D Where, PA TP The reference pelvic angle for the target position, PA SP Angle is the standard position and posture reference pelvic angle of the seat cushion. D 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: PA DTP =PA TP -δ Where, PA DTP Target pelvic angle for the dummy, PA TP is the reference pelvic angle of the target position, and δ is the dummy spatial structure angle difference between the dummy target pelvic angle and the reference pelvic angle of the target position.

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 of placing the dummy are as follows: S7-1) Place the dummy on the test seat so that the coordinate mean 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 are placed naturally on the seat armrests. If there are no armrests, keep the palms naturally in contact with the thighs. Extend the legs forward and lower them naturally, keep the thigh and calf on the same side in the same vertical plane, and naturally fit the seat cushion and leg support of the high-angle seat. The feet are naturally suspended in the air, and the longitudinal centerline of the feet is 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) to continue adjusting the dummy's posture. If yes, the placement of the lying dummy is completed.

10. The method for placing a lying dummy at a large inclination angle according to claim 1 or 9, characterized in that: The test requirements include: a. The mean value of the coordinates of the H points 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 pelvic angle of the dummy is within the range of ±3° of the target pelvic angle; c. The angles of the dummy’s head, lumbar spine, pelvis and X-axis are all within the range of 0°±1°.

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