Dummy H point coordinate measuring system and method

Abstract

The invention relates to the technical field of vehicle testing, in particular to a dummy H-point coordinate measuring system and method.The method comprises the steps that when a dummy model is in an initial placement state, measuring circular plates are arranged on the two sides of the dummy model, and the center position coordinates of a first positioning hole of the dummy model are determined; measuring an initial positioning hole center position coordinate and an H point position coordinate of the dummy model, and calculating an initial relative position based on a measurement result; an angle sensor is arranged in a dummy pelvis in the dummy model, and corresponding pelvis inclination angle real-time monitoring data are collected; judging whether the pelvis inclination angle real-time monitoring data at the current moment and the previous moment are changed or not, and if yes, determining a second relative position after the corresponding dummy pelvis is changed according to the pelvis inclination angle real-time monitoring data at the current moment and the initial relative position; and determining a dummy H point coordinate corresponding to the dummy model according to the corresponding second relative position at the current moment and the center position coordinate of the first positioning hole.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle testing, and particularly to a system and method for measuring the H-point coordinates of a dummy. Background Art

[0002] The H-point of a dummy, as a key reference point for the human sitting posture, is a core indicator for evaluating the ergonomic performance of products such as automotive seats and office furniture. In the automotive industry, the H-point coordinates directly affect the seat comfort, the design of seat belt fixing points, and the test results of crash safety performance; in the field of ergonomics, accurately measuring the dynamic change trajectory of the H-point is the basis for optimizing the product space layout and the human-computer interaction experience.

[0003] Traditional methods for measuring the H-point of a dummy mainly rely on static measurement. It is necessary to manually adjust the posture of the dummy and rely on fixed jigs for positioning, and it is impossible to track the change of the pelvic tilt angle in real time (such as the posture change caused by seat adjustment and human movement). When the posture of the dummy changes dynamically, it is necessary to repeatedly disassemble, reinstall the dummy and recalibrate, which is cumbersome and time-consuming, and the efficiency is low.

[0004] Based on this, there is an urgent need for a system and method for measuring the H-point coordinates of a dummy, which can achieve rapid and accurate measurement of the H-point of the dummy and greatly improve the measurement efficiency. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a system and method for measuring the H-point coordinates of a dummy, which can achieve rapid and accurate measurement of the H-point of the dummy and greatly improve the measurement efficiency.

[0006] To achieve the above purpose, a method for measuring the H-point coordinates of a dummy is provided, including the following steps: S1. Place the BIORID dummy model at a preset installation position, and at this time, the placement state of the BIORID dummy model is the initial placement state; S2. When the BIORID dummy model is in the initial placement state, set measurement circular plates on both sides of the BIORID dummy model, and determine the central position coordinates of the first positioning hole of the BIORID dummy model based on the position coordinates corresponding to any three measurement points on the measurement circular plates; S3. When the BIORID dummy model is in the initial placement state, based on a preset initial state measurement strategy, measure the central position coordinates of the initial positioning hole and the H-point position coordinates of the BIORID dummy model in the initial placement state, and calculate the initial relative position of the H-point of the corresponding BIORID dummy model relative to the central position of the initial positioning hole based on the measurement results; S4. Install an angular sensor on the dummy pelvis in the BIORID dummy model, and use the angular sensor to monitor the inclination angle of the dummy pelvis corresponding to the BIORID dummy model in real time, and collect the corresponding real-time monitoring data of the pelvis inclination angle; S5. According to the real-time monitoring data of the pelvis inclination angle collected, determine whether the real-time monitoring data of the pelvis inclination angle at the current moment and the previous moment has changed. If so, it is determined that the inclination angle of the dummy pelvis of the BIORID dummy model rotates at this time, and it is determined that the placement state of the BIORID dummy model at this time is the second placement state, and according to the real-time monitoring data of the pelvis inclination angle at the current moment and the initial relative position, determine the second relative position of the corresponding dummy pelvis after change at the current moment; S6. According to the determined second relative position corresponding to the current moment and the center position coordinates of the first positioning hole, determine the coordinates of the dummy H point corresponding to the BIORID dummy model.

[0007] Principle and effect of this solution: In this solution, the BIORID dummy model is placed at a preset position (S1) to ensure stable posture in the initial state, which serves as a benchmark for subsequent measurements. By setting measurement discs on both sides of the dummy, using the coordinates of any three points on the discs, the center position coordinates of the first positioning hole are calculated based on geometric principles (such as three points in space determining the center of a plane circle) (S2). This coordinate serves as a reference point in the initial state. Through a preset measurement strategy (such as a three-dimensional coordinate measuring instrument, laser scanning, etc.), directly obtain the relative position relationship (initial relative position) between the dummy H point and the center of the positioning hole in the initial state, and establish a mathematical relationship between the H point coordinates and the center of the positioning hole (S3).

[0008] An angular sensor (such as a gyroscope, inclinometer) is installed in the dummy pelvis to monitor the inclination angle change of the pelvis around a specific axis (such as the transverse axis, longitudinal axis) in real time, and output the pelvis inclination angle monitoring data (S4). Compare the inclination angle data at the current moment with that at the previous moment. If there is a change (exceeding the threshold), it is determined that the dummy posture changes from the initial state to the second placement state (such as a change in sitting posture, pelvic rotation, etc.). At this time, the change in the pelvis inclination angle will cause the position of the H point relative to the center of the positioning hole to change. Based on the initial relative position and the current pelvis inclination angle, calculate the new relative position (second relative position) of the H point after the pelvis posture changes. Combine the initial coordinates of the center of the positioning hole with the real-time updated relative position, and calculate the absolute coordinates of the dummy H point at the current moment through coordinate transformation (translation, rotation) (S6).

[0009] The determination of the H-point coordinates of traditional dummies is mostly static measurement. When the posture of the dummy changes, reinstallation and calibration are required, resulting in low efficiency. In this solution, angle sensors are installed inside the pelvic bone of the dummy to monitor the change of pelvic tilt angle in real time. Once the pelvic tilt angle data fluctuates, the system can quickly capture the signal of posture change, determine that the dummy enters the second placement state, and based on the initial relative position and the current tilt angle data, quickly calculate the changed H-point coordinates to achieve dynamic update of the coordinates.

[0010] This solution decouples the initial positioning and dynamic monitoring, and has strong universality. On the one hand, the method for determining the center coordinates of the initial positioning holes does not depend on a specific dummy model. Only by adjusting the installation position and measurement strategy of the measurement circular plate according to the structures of different dummies, the positioning of the reference points can be completed. On the other hand, the logic of the angle sensor monitoring the change of pelvic tilt angle and calculating the H-point coordinates is applicable to various human models with similar pelvic structures. This design enables this method to quickly adapt to different models of BIORID dummies without large-scale technical transformation, greatly reducing the technical migration cost and improving the versatility and reusability of the method. That is, it can achieve rapid and accurate measurement of the H-point of the dummy, greatly improving the measurement efficiency.

[0011] Further, the determination of the center position coordinates of the first positioning holes of the BIORID dummy model based on the position coordinates corresponding to any three measurement points on the measurement circular plate in S2 includes the following steps: Randomly select three points on the measurement circular plates on both sides of the BIORID dummy model as the corresponding measurement points, and determine the circumferential position coordinates corresponding to each measurement point; Based on the circumferential position coordinates corresponding to each measurement point, calculate the center position coordinates of the two measurement circular plates respectively based on the preset calculation formula for the center position coordinates of the circular plate; Based on the center position coordinates of the two measurement circular plates respectively, determine the center position coordinates of the first positioning holes of the BIORID dummy model based on the preset calculation formula for the center position coordinates of the first positioning holes; The preset calculation formula for the center position coordinates of the first positioning holes:

[0012]

[0013]

[0014] In the formula, is the center position coordinates of one of the measurement circular plates, is the center position coordinates of the other measurement circular plate, is the center position coordinates of the first positioning holes of the BIORID dummy model.

[0015] Beneficial effects: Based on the geometric principle that a unique circle can be determined by three points in space, the center position of the circular plate can be calculated by measuring the coordinates of any three points on the circular plate. This method does not rely on special marking points or complex instruments and can achieve positioning only through basic geometric operations (such as solving the equation of a circle in space), avoiding subjective errors caused by artificially selecting specific points and ensuring that the mathematical definition of the initial reference point is unique and reproducible. Combining the symmetric averaging algorithm (preset formula) of the center coordinates of the circular plates on both sides further eliminates the unilateral measurement deviation, making the center coordinates of the first positioning hole naturally have geometric symmetry, which conforms to the physical characteristics (such as left-right symmetry) of the dummy model structure design.

[0016] Furthermore, both the initial relative position and the second relative position of the H point of the BIORID dummy model with respect to the center position of the initial positioning hole include the relative rotation angles around the x-axis, y-axis, and z-axis, as well as the distance value between the center position of the positioning hole and the H point of the dummy.

[0017] Beneficial effects: By uniformly describing the initial relative position and the second relative position with three-axis rotation angles and a fixed distance, a standardized parameter system is constructed. This system can completely capture any attitude changes of the pelvis in three-dimensional space, avoiding the limitations of traditional single-axis measurements. The distance from the center of the positioning hole to the H point is used as a rigid body property, ensuring that the geometric relationship remains unchanged during the calculation process and simplifying the complexity of the dynamic model.

[0018] Furthermore, the determination logic for determining the second relative position corresponding to the changed dummy pelvis at the current moment according to the real-time monitoring data of the pelvic tilt angle at the current moment and the initial relative position in S5 is as follows:

[0019]

[0020]

[0021] In the formula, is the relative rotation angle around the x-axis corresponding to the second relative position, is the relative rotation angle around the y-axis corresponding to the second relative position, is the relative rotation angle around the z-axis corresponding to the second relative position; is the relative rotation angle around the x-axis corresponding to the second relative position, is the relative rotation angle around the y-axis corresponding to the second relative position, is the relative rotation angle around the z-axis corresponding to the second relative position; , , They are the rotation angles around the x-axis, y-axis, and z-axis respectively.

[0022] Beneficial effects: The change process from the initial relative position to the second relative position is completely driven by the real-time inclination angle, and all intermediate parameters (such as , , ) can be recorded and archived, which is convenient for subsequent data review or error tracing. For example, if the coordinates of a certain H-point are abnormal, the mutation point at a specific moment can be located by playing back the sensor data.

[0023] Furthermore, in step S6, according to the determined second relative position and the coordinate of the center position of the first positioning hole corresponding to the current moment, the coordinate of the H-point of the BIORID dummy model is determined.

[0024] It includes the following steps: According to the relative rotation angles around the x-axis, y-axis, and z-axis corresponding to the second relative position at the current moment, based on the preset coordinate transformation formula, the relative rotation angles around the x-axis, y-axis, and z-axis are transformed into the corresponding coordinate points in the spherical coordinate system; The preset coordinate transformation formula is:

[0025]

[0026]

[0027] In the formula, is the distance value between the center position of the positioning hole corresponding to the second relative position and the H-point of the dummy; , , are the corresponding coordinate points in the spherical coordinate system respectively; According to the coordinate points corresponding in the spherical coordinate system, the distance value between the center position of the positioning hole and the H-point of the dummy, and the coordinate of the center position of the first positioning hole of the BIORID dummy model, based on the preset H-point coordinate calculation formula, the coordinate of the H-point of the BIORID dummy model is calculated; The preset H-point coordinate calculation formula is:

[0028]

[0029]

[0030] In the formula, , , It is the H-point coordinate of the dummy corresponding to the BIORID dummy model.

[0031] Beneficial effects: Through the conversion formula from spherical coordinates to rectangular coordinates, the pelvic rotation angle and fixed distance are converted into the H-point space coordinates, realizing the accurate mathematical modeling of rigid body motion. The fixed distance forces the H-point to be on the sphere with the center of the positioning hole as the center of the sphere, avoiding the "virtual displacement" that violates the characteristics of the rigid body, and the calculation results conform to physical intuition. In spherical coordinates, the rotations of the x, y, and z axes can be independently decomposed into the changes of the polar angle and azimuth angle, avoiding the coupling effect of the three-axis rotation in rectangular coordinates (such as rotating around the y-axis will affect the x and z coordinates).

[0032] The present invention also provides a dummy H-point coordinate measurement system, which uses the above-mentioned dummy H-point coordinate measurement method. Brief Description of the Drawings

[0033] Figure 1 It is the flowchart of the dummy H-point coordinate measurement method in Embodiment 1 of the present invention. Detailed Description of the Embodiments

[0034] The following is a further detailed description through specific embodiments: Embodiment 1 A dummy H-point coordinate measurement method is basically as Figure 1 shown, and includes the following steps: S1. Place the BIORID dummy model at the preset installation position, and at this time, the placement state of the BIORID dummy model is the initial placement state; S2. When the BIORID dummy model is in the initial placement state, set measurement circular plates on both sides of the BIORID dummy model, and based on the position coordinates corresponding to any three measurement points on the measurement circular plates, determine the position coordinates of the center of the first positioning hole of the BIORID dummy model; The step of determining the position coordinates of the center of the first positioning hole of the BIORID dummy model based on the position coordinates corresponding to any three measurement points on the measurement circular plate in S2 includes the following steps: Randomly select three points on the measurement circular plates on both sides of the BIORID dummy model as the corresponding measurement points, and determine the circumferential position coordinates corresponding to each measurement point; The circumferential position coordinates are calculated as follows: Assume that the circumferential position coordinates on the circular plate A are respectively ( ), ( ), ( ), then the center position coordinates ( ) of the circular plate A can be expressed as:

[0035]

[0036]

[0037] Among them, .

[0038] Assume that the circumferential position coordinates on the circular plate B are respectively ( ), ( ), ( ), then the center position ( ) of the circular plate can be expressed as:

[0039]

[0040]

[0041] Among them, .

[0042] Based on the circumferential position coordinates corresponding to each measurement point, and based on the preset calculation formula for the center position coordinates of the circular plate, calculate the center position coordinates of the circular plate corresponding to each of the two measurement circular plates; Based on the center position coordinates of the circular plate corresponding to each of the two measurement circular plates, and based on the preset calculation formula for the center position coordinates of the first positioning hole, determine the center position coordinates of the first positioning hole of the BIORID dummy model; The preset calculation formula for the center position coordinates of the first positioning hole:

[0043]

[0044]

[0045] In the formula, is the center position coordinates of the circular plate corresponding to one of the measurement circular plates, is the center position coordinates of the circular plate corresponding to the other measurement circular plate, is the center position coordinates of the first positioning hole of the BIORID dummy model.

[0046] S3. When the BIORID dummy model is in the initial placement state, based on the preset initial state measurement strategy, measure the initial positioning hole center position coordinates and the H-point position coordinates of the BIORID dummy model in the initial placement state, and calculate the initial relative position of the H-point of the corresponding BIORID dummy model relative to the initial positioning hole center position based on the measurement results; S4. Install angular sensors on the pelvic bone of the BIORID dummy model, and use the angular sensors to monitor the inclination angle of the pelvic bone of the BIORID dummy model in real time, and collect the real-time monitoring data of the corresponding pelvic bone inclination angle; S5. According to the real-time monitoring data of the pelvic bone inclination angle collected, determine whether the real-time monitoring data of the pelvic bone inclination angle at the current moment and the previous moment has changed. If so, it is determined that the pelvic bone inclination angle of the BIORID dummy model rotates at this time, and it is determined that the placement state of the BIORID dummy model at this time is the second placement state, and according to the real-time monitoring data of the pelvic bone inclination angle at the current moment and the initial relative position, determine the second relative position corresponding to the changed pelvic bone of the dummy at the current moment; The initial relative position and the second relative position of the H point of the BIORID dummy model relative to the center position of the initial positioning hole both include the relative rotation angle around the x-axis, the relative rotation angle around the y-axis, the relative rotation angle around the z-axis, and the distance value between the center position of the positioning hole and the H point of the dummy. In this embodiment, the relative position between the center point position of the positioning hole and the H point of the dummy is defined as the relative rotation angles around the x-axis, y-axis and z-axis , , and distance . For example, measure the coordinates of the center position of the initial positioning hole of the BIORID dummy model and the position coordinates of the H point of the dummy, and obtain the initial installation center position coordinates as (x = 2400.666, y = -397.887, z = 873.077), and the position coordinates of the H point of the dummy are (x = 2330.564, y = -398.111, z = 834.939). Obtain the relative position of the H point of the dummy relative to the center position of the initial positioning hole as (-28.55°, -197.82°, 0°, 79.81). Since the pelvic structure of the dummy is a rigid body that cannot be deformed, the length is a fixed value.

[0047] The determination logic for determining the second relative position corresponding to the changed pelvic bone of the dummy at the current moment according to the real-time monitoring data of the pelvic bone inclination angle at the current moment and the initial relative position in S5 is as follows:

[0048]

[0049]

[0050] In the formula, is the relative rotation angle around the x-axis corresponding to the second relative position, is the relative rotation angle around the y-axis corresponding to the second relative position, is the relative rotation angle about the z-axis corresponding to the second relative position; is the relative rotation angle about the x-axis corresponding to the second relative position, is the relative rotation angle about the y-axis corresponding to the second relative position, is the relative rotation angle about the z-axis corresponding to the second relative position; , , are the rotation angle about the x-axis, the rotation angle about the y-axis, and the rotation angle about the z-axis respectively. The direction of the rotation angle follows the right-hand rule.

[0051] When the pelvic inclination angle of the dummy changes, the relative position between the center P of the positioning hole and the H-point of the dummy will change. The changed angular position information and distance are: Rotation angle about the x-axis:

[0052] Rotation angle about the y-axis:

[0053] Rotation angle about the z-axis:

[0054] Distance:

[0055] Convert the rectangular coordinate system to the spherical coordinate system. Since the rotation angle about the z-axis does not affect the transformation of the rectangular coordinate system, only the rotation angle about the x-axis, the rotation angle about the y-axis, and the distance information are used to determine the coordinates of the H-point. Define the relative position vector of the center of the positioning hole of the H-point as:

[0056] S6. Determine the coordinates of the H-point of the dummy corresponding to the BIORID dummy model according to the determined second relative position and the coordinates of the center position of the first positioning hole at the current moment.

[0057] The step of determining the coordinates of the H-point of the dummy corresponding to the BIORID dummy model according to the determined second relative position and the coordinates of the center position of the first positioning hole at the current moment in S6 includes the following steps: According to the relative rotation angle about the x-axis, the relative rotation angle about the y-axis, and the relative rotation angle about the z-axis corresponding to the second relative position at the current moment, based on the preset coordinate system conversion formula, convert the relative rotation angle about the x-axis, the relative rotation angle about the y-axis, and the relative rotation angle about the z-axis into the corresponding coordinate points in the spherical coordinate system; The preset coordinate system conversion formula is:

[0058]

[0059]

[0060] In the formula, is the distance value between the center position of the positioning hole corresponding to the second relative position and the H-point of the dummy; , , are respectively each coordinate point corresponding to the spherical coordinate system; According to each coordinate point corresponding to the spherical coordinate system, the distance value between the center position of the positioning hole and the H-point of the dummy, and the coordinate of the center position of the first positioning hole of the BIORID dummy model, based on the preset H-point coordinate calculation formula, calculate the H-point coordinate of the dummy corresponding to the BIORID dummy model; The preset H-point coordinate calculation formula is:

[0061]

[0062]

[0063] In the formula, , , are the H-point coordinates of the dummy corresponding to the BIORID dummy model.

[0064] This embodiment also discloses a dummy H-point coordinate measurement system, which uses the above-mentioned dummy H-point coordinate measurement method.

[0065] The above are only the embodiments of the present invention. Common knowledge such as specific structures and characteristics known in the art are described in too much detail here. Those of ordinary skill in the art know all the common technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can know all the existing technologies in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, combine their own abilities to complete and implement this solution. Some typical known structures or known methods should not become an obstacle for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A method for measuring the H-point coordinates of a dummy, characterized in that: Including the following steps: S1. Place the BIORID dummy model at the preset installation position, and at this time, the placement state of the BIORID dummy model is the initial placement state; S2. When the BIORID dummy model is in the initial placement state, set measuring circular plates on both sides of the BIORID dummy model, and based on the position coordinates corresponding to any three measurement point positions on the measuring circular plates, determine the central position coordinates of the first positioning hole of the BIORID dummy model; S3. When the BIORID dummy model is in the initial placement state, based on the preset initial state measurement strategy, measure the central position coordinates of the initial positioning hole and the H-point position coordinates of the BIORID dummy model in the initial placement state, and calculate the initial relative position of the H-point of the corresponding BIORID dummy model relative to the central position of the initial positioning hole based on the measurement results; S4. Install angle sensors inside the dummy pelvis of the BIORID dummy model, and use the angle sensors to monitor the inclination angle of the dummy pelvis corresponding to the BIORID dummy model in real time, and collect the corresponding real-time monitoring data of the pelvis inclination angle; S5. According to the collected real-time monitoring data of the pelvis inclination angle, judge whether the real-time monitoring data of the pelvis inclination angle at the current moment and the previous moment has changed. If so, judge that the inclination angle of the dummy pelvis of the BIORID dummy model rotates at this time, determine that the placement state of the BIORID dummy model at this time is the second placement state, and determine the second relative position of the changed dummy pelvis corresponding to the current moment according to the real-time monitoring data of the pelvis inclination angle at the current moment and the initial relative position; S6. According to the determined second relative position corresponding to the current moment and the central position coordinates of the first positioning hole, determine the coordinates of the dummy H-point corresponding to the BIORID dummy model.

2. The method for measuring the H-point coordinates of a dummy according to claim 1, characterized in that: The step of determining the central position coordinates of the first positioning hole of the BIORID dummy model based on the position coordinates corresponding to any three measurement point positions on the measuring circular plate in S2 includes the following steps: Randomly select three points on the measuring circular plates on both sides of the BIORID dummy model as the corresponding measurement points, and determine the circumferential position coordinates corresponding to each measurement point; According to the circumferential position coordinates corresponding to each measurement point, calculate the central position coordinates of the two measuring circular plates respectively based on the preset central position coordinate calculation formula of the circular plate; According to the central position coordinates of the two measuring circular plates respectively, determine the central position coordinates of the first positioning hole of the BIORID dummy model based on the preset first positioning hole central position coordinate calculation formula; The preset first positioning hole central position coordinate calculation formula: In the formula, is the coordinate of the center position of the circular plate corresponding to one of the measuring circular plates, is the coordinate of the center position of the circular plate corresponding to the other measuring circular plate, is the coordinate of the center position of the first positioning hole of the BIORID dummy model.

3. A method for measuring the H-point coordinates of a dummy according to claim 2, characterized in that: The initial relative position and the second relative position of the H-point of the BIORID dummy model relative to the central position of the initial positioning hole both include the relative rotation angle around the x-axis, the relative rotation angle around the y-axis, the relative rotation angle around the z-axis, and the distance value between the central position of the positioning hole and the dummy H-point.

4. A method for measuring the H-point coordinates of a dummy according to claim 3, characterized in that: The determination logic for determining the second relative position corresponding to the changed pelvis of the dummy at the current moment according to the real-time monitoring data of the pelvis inclination angle and the initial relative position at the current moment in S5 is as follows: In the formula, is the relative rotation angle around the x-axis corresponding to the second relative position, is the relative rotation angle around the y-axis corresponding to the second relative position, is the relative rotation angle around the z-axis corresponding to the second relative position; is the relative rotation angle around the x-axis corresponding to the second relative position, is the relative rotation angle around the y-axis corresponding to the second relative position, is the relative rotation angle around the z-axis corresponding to the second relative position; , , are the rotation angles around the x-axis, the rotation angle around the y-axis, and the rotation angle around the z-axis, respectively.

5. A method for measuring the H-point coordinates of a dummy according to claim 4, characterized in that: The steps for determining the dummy H-point coordinates corresponding to the BIORID dummy model according to the determined second relative position and the center position coordinates of the first positioning hole at the current moment in S6 are as follows: According to the relative rotation angle around the x-axis, the relative rotation angle around the y-axis, and the relative rotation angle around the z-axis corresponding to the second relative position at the current moment, based on the preset coordinate system conversion formula, convert the relative rotation angle around the x-axis, the relative rotation angle around the y-axis, and the relative rotation angle around the z-axis into the corresponding coordinate points in the spherical coordinate system; The preset coordinate system conversion formula is: In the formula, is the distance value between the center position of the positioning hole corresponding to the second relative position and the H-point of the dummy; , , are respectively the corresponding coordinate points in the spherical coordinate system; According to the respective coordinate points corresponding to the spherical coordinate system, the distance value between the center position of the positioning hole and the dummy H-point, and the center position coordinates of the first positioning hole of the BIORID dummy model, calculate the dummy H-point coordinates corresponding to the BIORID dummy model based on the preset H-point coordinate calculation formula; The preset H-point coordinate calculation formula is: In the formula, , , are the dummy H-point coordinates corresponding to the BIORID dummy model.

6. A dummy H-point coordinate measurement system, characterized in that: Use a method for measuring dummy H-point coordinates according to any one of claims 1 to 5 above.

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