Measurement method and apparatus for abdominal displacement of test dummy, and electronic device and medium

Abstract

Provided in the present application are a measurement method and apparatus for the abdominal displacement of a test dummy, and an electronic device and a medium, which are applied to a measurement device for the abdominal displacement of a test dummy. The measurement method comprises: using, as a measurement point, the point at which the front end of a universal joint is connected to an abdominal surface of a test dummy, and on the basis of design parameters of a measurement device, an initial displacement value of a pull-rod displacement sensor in the measurement device, and initial angles of a first angle sensor and a second angle sensor in the measurement device, determining initial coordinates of the measurement point for when the abdomen of the test dummy has not been impacted; after the abdomen of the test dummy has been impacted, on the basis of the current displacement value of the pull-rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor, determining the current coordinates of the measurement point for when the abdomen of the test dummy is impacted; and on the basis of the initial coordinates of the measurement point and the current coordinates of the measurement point, obtaining a three-dimensional displacement of a compressed abdomen of the test dummy. By using the technical solution provided in the present application, the accuracy of measuring the abdominal deformation of a dummy can be improved.

Description

Method, device, electronic equipment and medium for measuring abdominal displacement of test dummy

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311152669.8 filed with the State Intellectual Property Office of China on September 7, 2023, entitled “Method, device, electronic equipment and medium for measuring abdominal displacement of a test dummy,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of collision testing, and in particular to a method, device, electronic equipment and medium for measuring abdominal displacement of a test dummy. Background Art

[0004] Crash dummies are important instruments used to evaluate the passive safety performance of passenger vehicles (such as cars, trains, and aircraft). By combining biomechanical injury criteria with simulated crash tests, they evaluate the occupant protection of passenger vehicles, thereby continuously improving their safety. The abdomen is a particularly vulnerable area to injury, so testing the deformation of the dummy's abdomen during impact is essential for improving the safety of passenger vehicles.

[0005] Currently, the abdomen of most crash dummies is a one-piece foam filling, which has a certain degree of biosimulation, but is not capable of measuring and assessing damage. Some dummy collision compression displacement measurements use uniaxial deformation measurement, but this method is not suitable for the dummy abdomen because the abdomen is a soft body. This method will lead to inaccurate measurement of the dummy's abdominal deformation, affecting the safety assessment of manned vehicles. Therefore, how to accurately measure the dummy's abdominal deformation and provide accurate data support for the dummy's abdominal injury has become a problem that needs to be solved urgently.

[0006] Summary of the Invention

[0007] In view of this, the purpose of this application is to provide a method, device, electronic equipment and medium for measuring the displacement of the abdomen of a test dummy, which can determine the compressive displacement components of the dummy's abdomen in three directions through a simple measuring device composed of a pull rod displacement sensor and two angle sensors, so as to measure the spatial displacement caused by the impact on the dummy's abdomen, thereby improving the accuracy of measuring the deformation of the dummy's abdomen.

[0008] This application mainly includes the following aspects:

[0009] In a first aspect, an embodiment of the present application provides a method for measuring abdominal displacement of a test dummy, which is applied to a measuring device for the abdominal displacement of a test dummy. The measuring device comprises a pull rod displacement sensor, a first angle sensor, a second angle sensor, a connector, a universal joint, and a sensor base. The front end of the universal joint is connected to the abdominal surface of the test dummy. The end of the universal joint is connected to the front end of the pull rod displacement sensor. The end of the pull rod displacement sensor is connected to the rotating shafts of the first angle sensor and the second angle sensor respectively via a connector. The first angle sensor is fixed to the thoracic vertebra of the test dummy via the sensor base. The measuring method comprises:

[0010] Acquiring design parameters of the measuring device in a pre-established coordinate system, as well as an initial displacement value of a pull rod displacement sensor, and initial angles of a first angle sensor and a second angle sensor in the measuring device;

[0011] The point where the front end of the universal joint connects with the abdominal surface of the test dummy is used as a measurement point, and based on the design parameters, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor, the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted are determined;

[0012] After the abdomen of the test dummy is impacted, obtaining a current displacement value of a pull rod displacement sensor, and current angles of a first angle sensor and a second angle sensor in the measuring device;

[0013] Determining the current coordinates of the measurement point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor;

[0014] Based on the initial coordinates of the measuring points and the current coordinates of the measuring points, a three-dimensional displacement of the compressed abdomen of the test dummy is obtained.

[0015] Furthermore, the design parameters include a first distance and a second distance; the first distance is the vertical distance between the axis of the second angle sensor and the connecting plane between the sensor base and the thoracic vertebra; the second distance is the vertical distance between the axis of the first angle sensor and the axis of the tie rod displacement sensor; the step of determining the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters, the initial displacement value of the tie rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor includes:

[0016] Substituting the second distance, the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor into a first preset formula to obtain an initial horizontal axis coordinate;

[0017] Substituting the first distance, the initial displacement value of the tie rod displacement sensor, and the initial angle of the second angle sensor into a second preset formula to obtain an initial vertical axis coordinate; wherein the first angle sensor measures the angle between the axis of the second angle sensor and the Z axis in the coordinate system; and the second angle sensor measures the angle between the tie rod displacement sensor and the X axis in the coordinate system;

[0018] Substituting the second distance, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor into a third preset formula to obtain an initial vertical axis coordinate;

[0019] A combination of the initial horizontal axis coordinate, the initial vertical axis coordinate, and the initial vertical axis coordinate is determined as the initial coordinate of the measurement point when the abdomen of the test dummy is not impacted.

[0020] Furthermore, the step of determining the current coordinates of the measurement point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor includes:

[0021] Substituting the second distance, the current displacement value of the pull rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor into a fourth preset formula to obtain a current horizontal axis coordinate;

[0022] Substituting the first distance, the current displacement value of the pull rod displacement sensor, and the current angle of the second angle sensor into a fifth preset formula to obtain a current vertical axis coordinate;

[0023] Substituting the second distance, the current displacement value of the pull rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor into a sixth preset formula to obtain a current vertical axis coordinate;

[0024] A combination of the current horizontal axis coordinate, the current vertical axis coordinate, and the current vertical axis coordinate is determined as the current coordinate of the measurement point when the abdomen of the test dummy is impacted.

[0025] Furthermore, the first preset formula is the formula when the measurement time parameter in the fourth preset formula is zero; the second preset formula is the formula when the measurement time parameter in the fifth preset formula is zero; and the third preset formula is the formula when the measurement time parameter in the sixth preset formula is zero.

[0026] Furthermore, the step of obtaining the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measurement points and the current coordinates of the measurement points includes:

[0027] determining a difference between a current horizontal axis coordinate in the current coordinates of the measuring point and an initial horizontal axis coordinate in the initial coordinates of the measuring point as a current horizontal displacement;

[0028] determining a difference between a current longitudinal axis coordinate in the current coordinates of the measuring point and an initial longitudinal axis coordinate in the initial coordinates of the measuring point as a current longitudinal displacement;

[0029] determining a difference between a current vertical axis coordinate in the current coordinates of the measuring point and an initial vertical axis coordinate in the initial coordinates of the measuring point as a current vertical displacement;

[0030] A combination of the current lateral displacement, the current longitudinal displacement, and the current vertical displacement is determined as a three-dimensional displacement of the compressed abdomen of the test dummy.

[0031] Furthermore, the measuring method further includes:

[0032] The three-dimensional displacement of the left side of the abdomen of the test dummy due to compression is obtained by a measuring device fixed to the left side of the thoracic vertebra of the test dummy;

[0033] The three-dimensional displacement of the right side of the abdomen of the test dummy due to compression is obtained by a measuring device fixed to the right side of the thoracic vertebra of the test dummy;

[0034] Determining an average displacement of the test dummy's abdomen when compressed based on the three-dimensional displacement of the test dummy's left side of the abdomen and the three-dimensional displacement of the test dummy's right side of the abdomen when compressed;

[0035] Determining whether the average displacement of the compressed abdomen of the test dummy is within a preset abdominal calibration displacement range;

[0036] If so, the bionic performance of the abdomen of the test dummy is determined to be up to standard.

[0037] In a second aspect, an embodiment of the present application further provides a device for measuring the abdominal displacement of a test dummy, which is used in a device for measuring the abdominal displacement of a test dummy. The device comprises a pull rod displacement sensor, a first angle sensor, a second angle sensor, a connector, a universal joint, and a sensor base. The front end of the universal joint is connected to the abdominal surface of the test dummy. The end of the universal joint is connected to the front end of the pull rod displacement sensor. The end of the pull rod displacement sensor is connected to the rotating shafts of the first angle sensor and the second angle sensor respectively via a connector. The first angle sensor is fixed to the thoracic vertebra of the test dummy via the sensor base. The measuring device comprises:

[0038] a first acquisition module, configured to acquire design parameters of the measuring device in a pre-established coordinate system, as well as an initial displacement value of a pull rod displacement sensor, and initial angles of a first angle sensor and a second angle sensor in the measuring device;

[0039] a first determination module, configured to use a point where the front end of the universal joint connects with the abdominal surface of the test dummy as a measurement point, and determine an initial coordinate of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters, an initial displacement value of the pull rod displacement sensor, and initial angles of the first angle sensor and the second angle sensor;

[0040] a second acquisition module, configured to acquire a current displacement value of the pull rod displacement sensor, and current angles of the first angle sensor and the second angle sensor in the measuring device after the abdomen of the test dummy is impacted;

[0041] a second determining module, configured to determine the current coordinates of the measuring point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor;

[0042] The measuring module is used to obtain the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measuring point and the current coordinates of the measuring point.

[0043] Furthermore, the design parameters include a first distance and a second distance; the first distance is the perpendicular distance between the axis of the second angle sensor and the plane connecting the sensor base and the thoracic vertebra; the second distance is the perpendicular distance between the axis of the first angle sensor and the axis of the tie rod displacement sensor; when the first determination module is used to determine the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters, the initial displacement value of the tie rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor, the first determination module is specifically used to:

[0044] Substituting the second distance, the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor into a first preset formula to obtain an initial horizontal axis coordinate;

[0045] Substituting the first distance, the initial displacement value of the tie rod displacement sensor, and the initial angle of the second angle sensor into a second preset formula to obtain an initial vertical axis coordinate; wherein the first angle sensor measures the angle between the axis of the second angle sensor and the Z axis in the coordinate system; and the second angle sensor measures the angle between the tie rod displacement sensor and the X axis in the coordinate system;

[0046] Substituting the second distance, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor into a third preset formula to obtain an initial vertical axis coordinate;

[0047] A combination of the initial horizontal axis coordinate, the initial vertical axis coordinate, and the initial vertical axis coordinate is determined as the initial coordinate of the measurement point when the abdomen of the test dummy is not impacted.

[0048] In a third aspect, an embodiment of the present application further provides an electronic device comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate via the bus, and when the machine-readable instructions are executed by the processor, the steps of the method for measuring the abdominal displacement of a test dummy as described above are performed.

[0049] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above-mentioned method for measuring the abdominal displacement of a test dummy are executed.

[0050] The embodiment of the present application provides a method, device, electronic device and medium for measuring the abdominal displacement of a test dummy, which is applied to a device for measuring the abdominal displacement of a test dummy, wherein the measuring device is composed of a pull rod displacement sensor, a first angle sensor, a second angle sensor, a connector, a universal joint and a sensor base; the front end of the universal joint is connected to the abdominal surface of the test dummy; the end of the universal joint is connected to the front end of the pull rod displacement sensor, and the end of the pull rod displacement sensor is connected to the rotating shafts of the first angle sensor and the second angle sensor respectively through a connector; the first angle sensor is fixed to the thoracic vertebra of the test dummy through the sensor base; the measuring method comprises: obtaining the design parameters of the measuring device in a pre-established coordinate system, as well as the initial displacement value of the pull rod displacement sensor in the measuring device, the first angle sensor, the second angle sensor, the first angle sensor and the second angle sensor; and the initial angles of the first angle sensor and the second angle sensor; taking the point where the front end of the universal joint connects to the abdominal surface of the test dummy as the measuring point, and determining the initial coordinates of the measuring point when the abdomen of the test dummy is not impacted based on the design parameters and the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor; after the abdomen of the test dummy is impacted, obtaining the current displacement value of the pull rod displacement sensor, the current angles of the first angle sensor and the second angle sensor in the measuring device; determining the current coordinates of the measuring point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor, the current angles of the first angle sensor and the second angle sensor; and obtaining the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measuring point and the current coordinates of the measuring point.

[0051] In this way, the technical solution provided by this application can determine the compressive displacement components of the dummy's abdomen in three directions through a simple measuring device consisting of a pull rod displacement sensor and two angle sensors, so as to measure the spatial displacement caused by the impact on the dummy's abdomen, thereby improving the accuracy of measuring the deformation of the dummy's abdomen.

[0052] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0054] FIG1 shows a flow chart of a method for measuring abdominal displacement of a test dummy provided in an embodiment of the present application;

[0055] FIG2 shows a flow chart of another method for measuring abdominal displacement of a test dummy provided in an embodiment of the present application;

[0056] FIG3 is a schematic diagram showing a structure of a measuring device provided in an embodiment of the present application;

[0057] FIG4 shows one schematic diagram of a coordinate system provided in an embodiment of the present application;

[0058] FIG5 shows a second schematic diagram of a coordinate system provided in an embodiment of the present application;

[0059] FIG6 is a schematic diagram showing a spatial geometry principle provided by an embodiment of the present application;

[0060] FIG7 shows one structural diagram of a device for measuring abdominal displacement of a test dummy provided in an embodiment of the present application;

[0061] FIG8 shows a second structural diagram of a device for measuring abdominal displacement of a test dummy provided in an embodiment of the present application;

[0062] FIG9 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art, under the guidance of the contents of this application, can add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0064] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0065] In order to enable those skilled in the art to use the contents of this application, the following implementation method is provided in combination with the specific application scenario "measurement of abdominal displacement of a test dummy". For those skilled in the art, the general principles defined here can be applied to other embodiments and application scenarios without departing from the spirit and scope of this application.

[0066] The following methods, devices, electronic devices, or computer-readable storage media of the embodiments of the present application can be applied to any scenario requiring measurement of the abdominal displacement of a test dummy. The embodiments of the present application are not limited to specific application scenarios. Any scheme using the method, device, electronic device, and storage medium for measuring the abdominal displacement of a test dummy provided in the embodiments of the present application is within the scope of protection of this application.

[0067] It's worth noting that crash dummies are crucial tools for evaluating the passive safety performance of passenger vehicles (such as cars, trains, and airplanes). This approach primarily involves evaluating the occupant protection of passenger vehicles using biomechanical injury criteria in simulated crash tests, thereby continuously improving the safety of these vehicles. The abdomen is a particularly vulnerable area to injury, so testing the deformation of the dummy's abdomen during impact is crucial for improving the safety of passenger vehicles.

[0068] Currently, the abdomen of most crash dummies is a one-piece foam filling, which has a certain degree of biosimulation, but is not capable of measuring and assessing damage. Some dummy collision compression displacement measurements use uniaxial deformation measurement, but this method is not suitable for the dummy abdomen because the abdomen is a soft body. This method will lead to inaccurate measurement of the dummy's abdominal deformation, affecting the safety assessment of manned vehicles. Therefore, how to accurately measure the dummy's abdominal deformation and provide accurate data support for the dummy's abdominal injury has become a problem that needs to be solved urgently.

[0069] Based on this, the present application proposes a method, device, electronic equipment and medium for measuring the abdominal displacement of a test dummy, which is applied to the measuring equipment for the abdominal displacement of a test dummy, the measuring equipment consisting of a pull rod displacement sensor, a first angle sensor, a second angle sensor, a connecting piece, a universal joint and a sensor base; the front end of the universal joint is connected to the abdominal surface of the test dummy; the end of the universal joint is connected to the front end of the pull rod displacement sensor, and the end of the pull rod displacement sensor is respectively connected to the rotating shafts of the first angle sensor and the second angle sensor through a connecting piece; the first angle sensor is fixed to the thoracic vertebra of the test dummy through the sensor base; the measuring method includes: obtaining the design parameters of the measuring equipment in a pre-established coordinate system, as well as the initial displacement value of the pull rod displacement sensor, the first angle sensor and the initial angles of the first angle sensor and the second angle sensor; taking the point where the front end of the universal joint connects to the abdominal surface of the test dummy as the measuring point, and determining the initial coordinates of the measuring point when the abdomen of the test dummy is not impacted based on the design parameters and the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor; after the abdomen of the test dummy is impacted, obtaining the current displacement value of the pull rod displacement sensor, the current angles of the first angle sensor and the second angle sensor in the measuring device; determining the current coordinates of the measuring point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor, the current angles of the first angle sensor and the second angle sensor; and obtaining the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measuring point and the current coordinates of the measuring point.

[0070] In this way, the technical solution provided by this application can determine the compressive displacement components of the dummy's abdomen in three directions through a simple measuring device consisting of a pull rod displacement sensor and two angle sensors, so as to measure the spatial displacement caused by the impact on the dummy's abdomen, thereby improving the accuracy of measuring the deformation of the dummy's abdomen.

[0071] To facilitate understanding of the present application, the technical solutions provided in the present application will be described in detail below in conjunction with specific embodiments.

[0072] Please refer to FIG1 , which is a flow chart of a method for measuring abdominal displacement of a test dummy provided in an embodiment of the present application. As shown in FIG1 , the measurement method includes:

[0073] S101, obtaining design parameters of the measuring device in a pre-established coordinate system, as well as an initial displacement value of a pull rod displacement sensor, and initial angles of a first angle sensor and a second angle sensor in the measuring device;

[0074] It should be noted that the measurement method provided in this embodiment is applied to a measuring device for the abdominal displacement of a test dummy. Please refer to Figure 3, which is a schematic diagram of the structure of a measuring device provided in an embodiment of the present application. As shown in Figure 3, the measuring device is composed of a pull rod displacement sensor 1, a first angle sensor 4, a second angle sensor 5, a connecting piece 3, a universal joint 2 and a sensor base 6; the end of the moving rod of the pull rod displacement sensor 1 is connected to the outer surface of the test dummy's abdomen by a universal joint 2; the sleeve at the fixed end of the pull rod displacement sensor 1 is connected to the rotating shaft of the first angle sensor 4 and the second angle sensor 5 respectively through the connecting piece 3; the first angle sensor 4 is fixed to the thoracic vertebra of the test dummy through the sensor base 6, and the final test dummy's abdominal compression displacement measurement values ​​are all relative to the thoracic vertebra.

[0075] As an example, please refer to Figures 4 and 5. Figure 4 is one of the schematic diagrams of a coordinate system provided in an embodiment of the present application, and Figure 5 is the second schematic diagram of a coordinate system provided in an embodiment of the present application. As shown in Figures 4 and 5, Figure 4 is a front view of the measuring device, and Figure 5 is a top view of the measuring device. A coordinate system can be established with the intersection of the rotation axis center of the sensor base 6 and the connection plane of the sensor base 6 and the thoracic vertebra as the coordinate origin, the axis of the pull rod displacement sensor 1 in the horizontal position as the X-axis, the rotation axis center of the first angle sensor 4 as the Y-axis, and the direction perpendicular to the XY plane as the Z-axis; after the three sensors are connected in the above manner, the pull rod displacement sensor 1 has three degrees of freedom in the X-direction, the rotation around the Y-axis, and the rotation around the Z-axis. Here, the design parameters include a first distance L1 and a second distance L2. The first distance L1 is the perpendicular distance between the axis of the second angle sensor 5 and the plane connecting the sensor base 6 and the thoracic vertebra. The second distance L2 is the perpendicular distance between the axis of the first angle sensor 4 and the axis of the tie rod displacement sensor 1. L1 and L2 are generally constants based on design requirements. The first angle sensor 4 measures the angle ω between the axis of the second angle sensor 5 and the Z axis in the XZ plane of the coordinate system. The second angle sensor 5 measures the angle θ between the tie rod displacement sensor 1 and the X axis in the XY plane of the coordinate system. The tie rod displacement sensor 1 measures the tie rod distance r between the universal joint 2 and the connector 3. The initial displacement value r0 is the initial displacement value of the tie rod displacement sensor 1 installed on the abdomen of the test dummy. The initial angle ω0 of the first angle sensor 4 is the initial angle between the axis of the second angle sensor 5 and the Z axis in the XZ plane, that is, the initial reading of the first angle sensor 4. The initial angle θ0 of the second angle sensor 5 is the initial angle between the tie rod sensor 1 and the X axis in the XY plane, that is, the initial reading of the second angle sensor 5.

[0076] S102: Using the point where the front end of the universal joint connects with the abdominal surface of the test dummy as a measurement point, and determining the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor;

[0077] In this step, the coordinates (x0, y0, z0) of the initial position A of the fixed point (ie, the measurement point) of the test dummy's abdominal surface measurement device can be calculated using the above-mentioned pre-established coordinate system and trigonometric function relationships.

[0078] It should be noted that, referring to FIG. 2 , FIG. 2 is a flow chart of another method for measuring abdominal displacement of a test dummy provided in an embodiment of the present application. As shown in FIG. 2 , the steps of determining the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor include:

[0079] S201, substituting the second distance, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor into a first preset formula to obtain an initial horizontal axis coordinate;

[0080] In this step, the first preset formula is as follows: x0=r0cosθ0cosω0-L2sinω0;

[0081] Among them, r0 is the initial displacement value of the pull rod displacement sensor, θ0 is the initial angle of the second angle sensor, ω0 is the initial angle of the first angle sensor, L2 is the second distance, and x0 is the horizontal coordinate of the initial position point A (the initial horizontal axis coordinate of the measuring point).

[0082] S202, substituting the first distance, the initial displacement value of the pull rod displacement sensor, and the initial angle of the second angle sensor into a second preset formula to obtain an initial vertical axis coordinate;

[0083] In this step, the second preset formula is as follows: y0=r0sinθ0+L1;

[0084] Wherein, L1 is the first distance, and y0 is the ordinate of the initial position point A (the initial ordinate coordinate of the measurement point).

[0085] S203, substituting the second distance, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor into a third preset formula to obtain an initial vertical axis coordinate;

[0086] In this step, the third preset formula is as follows: z0=r0cosθ0sinω0+L2cosω0;

[0087] Wherein, z0 is the vertical coordinate of the initial position point A (the initial vertical axis coordinate of the measurement point).

[0088] S204 : Determine a combination of the initial horizontal axis coordinate, the initial vertical axis coordinate, and the initial vertical axis coordinate as the initial coordinate of the measurement point when the abdomen of the test dummy is not impacted.

[0089] In this step, the coordinates (x0, y0, z0) of the initial position point A, ie, the initial coordinates of the measurement point, can be obtained through steps S201 to S203.

[0090] S103, after the abdomen of the test dummy is impacted, obtaining a current displacement value of the pull rod displacement sensor, and current angles of the first angle sensor and the second angle sensor in the measuring device;

[0091] In this step, after the test dummy's abdomen is impacted, the sensor readings are reread to determine the coordinates (x1, y1, z1) of the position B of the measurement point on the test dummy's abdomen surface when it was impacted, that is, the current coordinates of the measurement point.

[0092] S104, determining the current coordinates of the measurement point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor;

[0093] It should be noted that the step of determining the current coordinates of the measurement point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor includes:

[0094] S1041: Substitute the second distance, the current displacement value of the pull rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor into a fourth preset formula to obtain a current horizontal axis coordinate;

[0095] In this step, the fourth preset formula is as follows: x1=(r0+Δr(t))cos(θ0+Δθ(t))cos(ω0+Δω(t))-L2sin(ω0+Δω(t));

[0096] Among them, (r0+Δr(t)) is the current displacement value of the pull rod displacement sensor, (θ0+Δθ(t)) is the current angle of the second angle sensor, (ω0+Δω(t)) is the current angle of the first angle sensor, and x1 is the horizontal coordinate of the current position point B (the current horizontal axis coordinate of the measurement point).

[0097] S1042: Substitute the first distance, the current displacement value of the pull rod displacement sensor, and the current angle of the second angle sensor into a fifth preset formula to obtain a current vertical axis coordinate;

[0098] In this step, the fifth preset formula is as follows: y1=(r0+Δr(t))sin(θ0+Δθ(t))+L1;

[0099] Where y1 is the ordinate of the current position point B (the current ordinate coordinate of the measurement point).

[0100] S1043: Substitute the second distance, the current displacement value of the pull rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor into a sixth preset formula to obtain a current vertical axis coordinate;

[0101] In this step, the sixth preset formula is as follows: z1=(r0+Δr(t))cos(θ0+Δθ(t))sin(ω0+Δω(t))+L2cos(ω0+Δω(t));

[0102] Wherein, z1 is the vertical coordinate of the current position point B (the current vertical axis coordinate of the measurement point).

[0103] S1044: Determine a combination of the current horizontal axis coordinate, the current vertical axis coordinate, and the current vertical axis coordinate as the current coordinate of the measurement point when the abdomen of the test dummy is impacted.

[0104] In this step, the coordinates (x1, y1, z1) of the current position point B can be obtained through steps S1041 to S1043, that is, the current coordinates of the measurement point when the abdomen of the test dummy is impacted.

[0105] Here, it can be seen that the first preset formula is the formula when the measurement time parameters (Δr(t), Δθ(t), Δω(t)) in the fourth preset formula are zero; similarly, the second preset formula is the formula when the measurement time parameters in the fifth preset formula are zero; the third preset formula is the formula when the measurement time parameters in the sixth preset formula are zero.

[0106] S105 : Obtaining a three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measurement point and the current coordinates of the measurement point.

[0107] It should be noted that the steps of obtaining the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measurement points and the current coordinates of the measurement points include:

[0108] S1051. Determine the difference between the current horizontal axis coordinate in the current coordinates of the measuring point and the initial horizontal axis coordinate in the initial coordinates of the measuring point as the current horizontal displacement;

[0109] S1052: Determine the difference between the current longitudinal axis coordinate in the current coordinates of the measuring point and the initial longitudinal axis coordinate in the initial coordinates of the measuring point as the current longitudinal displacement;

[0110] S1053: Determine the difference between the current vertical axis coordinate in the current coordinates of the measuring point and the initial vertical axis coordinate in the initial coordinates of the measuring point as the current vertical displacement;

[0111] S1054: Determine a combination of the current lateral displacement, the current longitudinal displacement, and the current vertical displacement as a three-dimensional displacement of the compressed abdomen of the test dummy.

[0112] In steps S1051 to S1054, the compression displacement change of the measurement point on the abdominal surface of the test dummy before and after the impact can be determined. The specific formula is as follows: Δx=x1-x0; Δy=y1-y0; Δz=z1-z0;

[0113] Among them, Δx is the current lateral displacement, Δy is the current vertical displacement, and Δz is the current vertical displacement. The three-dimensional displacement of the compressed abdomen of the test dummy is (Δx, Δy, Δz).

[0114] It should be noted that the measurement method also includes:

[0115] 1. Obtaining the three-dimensional displacement of the left side of the test dummy's abdomen under compression using a measuring device fixed to the left side of the test dummy's thoracic vertebrae;

[0116] 2. Obtaining the three-dimensional displacement of the right side of the test dummy's abdomen under compression by a measuring device fixed to the right side of the test dummy's thoracic vertebrae;

[0117] 3. determining an average displacement of the test dummy's abdomen when compressed based on the three-dimensional displacement of the test dummy's left side and the three-dimensional displacement of the test dummy's right side;

[0118] 4. Determine whether the average displacement of the test dummy's abdomen when compressed is within a preset abdominal calibration displacement range;

[0119] 5. If yes, the bionic performance of the abdomen of the test dummy is determined to be up to standard.

[0120] In steps 1 to 5, since the restraints or impact forces on the left and right sides of the test dummy's abdomen are generally inconsistent, a measuring device can be installed on each side of the test dummy's abdomen to measure the compression displacement on both sides of the abdomen respectively to assess personal injury.

[0121] As an example, the sensor bases 6 of the two measuring devices are respectively fixed on the left and right sides of the thoracic vertebrae of the dummy, and the front end of the universal joint 2 is connected to the front surface of the abdomen of the dummy; referring to the coordinate system regulations of the dummy itself, the intersection of the rotation axis center of the sensor base 6 and the connection plane of the sensor base 6 and the thoracic vertebrae is used as the coordinate origin, the horizontal position axis of the pull rod sensor 1 is used as the X-axis, the rotation axis center of the first angle sensor 4 is used as the Y-axis, and the direction perpendicular to the XY plane is used as the Z-axis to establish the coordinate system of the measuring device; according to the coordinate system established above, combined with Figure 6, Figure 6 is an embodiment of the present application A schematic diagram of the spatial geometry principle is provided, as shown in FIG6 . The coordinates of the initial position A of the fixed point of the dummy abdomen surface measurement device are (x0, y0, z0). According to the definition of the parameters, the specific design parameters are: L1 = 42.5 mm, L2 = 31.5 mm. After the dummy abdomen displacement measurement unit is installed in the dummy abdomen, the initial values ​​of the pull rod displacement sensor and the two angle sensors are read and recorded according to the display of the data collector: r0 = 179.7 mm; θ0 = 6.95°; ω0 = 1.32°. The above L1, L 2. Substitute r0, θ0, and ω0 into the formulas (the first preset formula, the second preset formula, and the third preset formula) to calculate the initial coordinates (x0, y0, z0) of the measuring device when it is installed on the dummy's chest without being impacted, namely (177.61, 64.25, 35.60). According to the dummy's abdominal impact calibration requirements, use an impact hammer to impact the dummy's abdomen at a certain speed. During the impact, the dummy's abdomen is compressed and produces a compression displacement. According to the data acquisition device display, read the values ​​of the pull rod displacement sensor and the two angle sensors at the same time again and record them. :r1=r0+Δr(t)=131.72mm、θ1=θ0+Δθ(t)=6.48°、ω1=ω0+Δω(t)=5.25°;Substitute the recorded values ​​of r1, θ1, ω1 into the formulas (the fourth preset formula, the fifth preset formula, and the sixth preset formula) to calculate the coordinates (x1, y1, z1) of the front end of the ribs of the dummy when the measuring device is installed when the chest is impacted, i.e., (127.45, 57.37, 43.35); The three-dimensional displacement of the dummy's abdominal compression displacement can be calculated by the following formulas, i.e., Δx=x1-x0=177.61-127.45=-50.16mm; Δy=y1-y0=64.25-57.37=6.88mm; Δz=z1-z0=35.60-43.35=-7.75mm;

[0122] Similarly, similar to the above method, the three-dimensional displacement of the left and right sides of the dummy's abdomen can be calculated separately. By calculating the average of the compression of the left and right abdomens and comparing it with the range required for abdomen calibration, it can be examined whether the bionic performance of the dummy's abdomen meets the standard. The measurement method provided in this embodiment can effectively measure the three-dimensional displacement of the collision dummy's abdomen when it is impacted, providing more accurate and reliable data reference for dummy abdomen calibration and dummy injury assessment.

[0123] In summary, the measurement method provided in this embodiment is applied to a measuring device. The measuring device only involves one pull rod sensor and two angle sensors, and has the characteristics of simple structure, small space occupation, and accurate measurement. It plays an important supporting role in its structural design, is easy to implement, and is easy to obtain. The one movement and two rotational degrees of freedom in the pull rod sensor can be utilized to decompose the spatial coordinates to give the displacement component in each direction, and the dummy's abdominal compression displacement can be accurately calculated. It can correspond to the passive safety occupant injury assessment index, which is more conducive to the safety assessment of personnel protection in manned vehicles.

[0124] The embodiment of the present application provides a method for measuring the abdominal displacement of a test dummy, which is applied to a measuring device for the abdominal displacement of a test dummy, wherein the measuring device is composed of a pull rod displacement sensor, a first angle sensor, a second angle sensor, a connecting piece, a universal joint and a sensor base; the front end of the universal joint is connected to the abdominal surface of the test dummy; the end of the universal joint is connected to the front end of the pull rod displacement sensor, and the end of the pull rod displacement sensor is connected to the rotating shafts of the first angle sensor and the second angle sensor respectively through a connecting piece; the first angle sensor is fixed to the thoracic vertebra of the test dummy through the sensor base; the measuring method comprises: obtaining the design parameters of the measuring device in a pre-established coordinate system, and the initial displacement value of the pull rod displacement sensor, the first angle sensor and the second angle sensor in the measuring device the initial angle of the angle sensor; taking the point where the front end of the universal joint connects to the abdominal surface of the test dummy as the measuring point, and determining the initial coordinates of the measuring point when the abdomen of the test dummy is not impacted based on the design parameters and the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor; after the abdomen of the test dummy is impacted, obtaining the current displacement value of the pull rod displacement sensor, the current angles of the first angle sensor and the second angle sensor in the measuring device; determining the current coordinates of the measuring point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor, the current angles of the first angle sensor and the second angle sensor; and obtaining the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measuring point and the current coordinates of the measuring point.

[0125] In this way, the technical solution provided by this application can determine the compressive displacement components of the dummy's abdomen in three directions through a simple measuring device consisting of a pull rod displacement sensor and two angle sensors, so as to measure the spatial displacement caused by the impact on the dummy's abdomen, thereby improving the accuracy of measuring the deformation of the dummy's abdomen.

[0126] Based on the same application concept, the embodiments of the present application also provide a device for measuring the abdominal displacement of a test dummy corresponding to the above-mentioned method for measuring the abdominal displacement of a test dummy. Since the principle of solving the problem by the device in the embodiments of the present application is similar to the method in the above-mentioned embodiments of the present application, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0127] Please refer to Figures 7 and 8. Figure 7 is one of the structural diagrams of a test dummy abdominal displacement measuring device provided in an embodiment of the present application, and Figure 8 is the second structural diagram of a test dummy abdominal displacement measuring device provided in an embodiment of the present application. The measuring device for measuring the abdominal displacement of a test dummy is composed of a pull rod displacement sensor, a first angle sensor, a second angle sensor, a connector, a universal joint, and a sensor base; the front end of the universal joint is connected to the abdominal surface of the test dummy; the end of the universal joint is connected to the front end of the pull rod displacement sensor, and the end of the pull rod displacement sensor is connected to the rotating shafts of the first angle sensor and the second angle sensor respectively through a connector; the first angle sensor is fixed to the thoracic vertebra of the test dummy through the sensor base; as shown in Figure 7, the measuring device 710 includes:

[0128] A first acquisition module 711 is configured to acquire design parameters of the measuring device in a pre-established coordinate system, as well as an initial displacement value of a pull rod displacement sensor, and initial angles of a first angle sensor and a second angle sensor in the measuring device;

[0129] a first determining module 712 configured to use a point where the front end of the universal joint connects with the abdominal surface of the test dummy as a measurement point, and determine the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor;

[0130] A second acquisition module 713 is configured to acquire a current displacement value of the rod displacement sensor, and current angles of the first angle sensor and the second angle sensor in the measuring device after the abdomen of the test dummy is impacted;

[0131] A second determining module 714 is configured to determine the current coordinates of the measurement point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor;

[0132] The measurement module 715 is configured to obtain the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measurement point and the current coordinates of the measurement point.

[0133] Optionally, the design parameters include a first distance and a second distance; the first distance is the perpendicular distance between the axis of the second angle sensor and the plane connecting the sensor base and the thoracic vertebra; the second distance is the perpendicular distance between the axis of the first angle sensor and the axis of the tie rod displacement sensor; when the first determination module 712 is used to determine the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters, the initial displacement value of the tie rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor, the first determination module 712 is specifically configured to:

[0134] Substituting the second distance, the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor into a first preset formula to obtain an initial horizontal axis coordinate;

[0135] Substituting the first distance, the initial displacement value of the tie rod displacement sensor, and the initial angle of the second angle sensor into a second preset formula to obtain an initial vertical axis coordinate; wherein the first angle sensor measures the angle between the axis of the second angle sensor and the Z axis in the coordinate system; and the second angle sensor measures the angle between the tie rod displacement sensor and the X axis in the coordinate system;

[0136] Substituting the second distance, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor into a third preset formula to obtain an initial vertical axis coordinate;

[0137] A combination of the initial horizontal axis coordinate, the initial vertical axis coordinate, and the initial vertical axis coordinate is determined as the initial coordinate of the measurement point when the abdomen of the test dummy is not impacted.

[0138] Optionally, when the second determining module 714 is configured to determine the current coordinates of the measurement point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor, the second determining module 714 is specifically configured to:

[0139] Substituting the second distance, the current displacement value of the pull rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor into a fourth preset formula to obtain a current horizontal axis coordinate;

[0140] Substituting the first distance, the current displacement value of the pull rod displacement sensor, and the current angle of the second angle sensor into a fifth preset formula to obtain a current vertical axis coordinate;

[0141] Substituting the second distance, the current displacement value of the pull rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor into a sixth preset formula to obtain a current vertical axis coordinate;

[0142] A combination of the current horizontal axis coordinate, the current vertical axis coordinate, and the current vertical axis coordinate is determined as the current coordinate of the measurement point when the abdomen of the test dummy is impacted.

[0143] Optionally, the first preset formula is the formula when the measurement time parameter in the fourth preset formula is zero; the second preset formula is the formula when the measurement time parameter in the fifth preset formula is zero; and the third preset formula is the formula when the measurement time parameter in the sixth preset formula is zero.

[0144] Optionally, when the measuring module 715 is used to obtain the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measuring point and the current coordinates of the measuring point, the measuring module 715 is specifically used to:

[0145] determining a difference between a current horizontal axis coordinate in the current coordinates of the measuring point and an initial horizontal axis coordinate in the initial coordinates of the measuring point as a current horizontal displacement;

[0146] determining a difference between a current longitudinal axis coordinate in the current coordinates of the measuring point and an initial longitudinal axis coordinate in the initial coordinates of the measuring point as a current longitudinal displacement;

[0147] determining a difference between a current vertical axis coordinate in the current coordinates of the measuring point and an initial vertical axis coordinate in the initial coordinates of the measuring point as a current vertical displacement;

[0148] A combination of the current lateral displacement, the current longitudinal displacement, and the current vertical displacement is determined as a three-dimensional displacement of the compressed abdomen of the test dummy.

[0149] Optionally, as shown in FIG8 , the measuring device 710 further includes an application module 716 , and the application module 716 is configured to:

[0150] The three-dimensional displacement of the left side of the abdomen of the test dummy due to compression is obtained by a measuring device fixed to the left side of the thoracic vertebra of the test dummy;

[0151] The three-dimensional displacement of the right side of the abdomen of the test dummy due to compression is obtained by a measuring device fixed to the right side of the thoracic vertebra of the test dummy;

[0152] Determining an average displacement of the test dummy's abdomen when compressed based on the three-dimensional displacement of the test dummy's left side of the abdomen and the three-dimensional displacement of the test dummy's right side of the abdomen when compressed;

[0153] Determining whether the average displacement of the compressed abdomen of the test dummy is within a preset abdominal calibration displacement range;

[0154] If so, the bionic performance of the abdomen of the test dummy is determined to be up to standard.

[0155] An embodiment of the present application provides a device for measuring the abdominal displacement of a test dummy, which is applied to a measuring device for the abdominal displacement of a test dummy, wherein the measuring device is composed of a pull rod displacement sensor, a first angle sensor, a second angle sensor, a connecting piece, a universal joint and a sensor base; the front end of the universal joint is connected to the abdominal surface of the test dummy; the end of the universal joint is connected to the front end of the pull rod displacement sensor, and the end of the pull rod displacement sensor is connected to the rotating shafts of the first angle sensor and the second angle sensor respectively through a connecting piece; the first angle sensor is fixed to the thoracic vertebra of the test dummy through the sensor base; the measuring device includes: a first acquisition module for acquiring the design parameters of the measuring device in a pre-established coordinate system, as well as the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor in the measuring device; a first a determination module for taking the point where the front end of the universal joint connects with the abdominal surface of the test dummy as a measurement point, and determining the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters and the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor, and the second angle sensor; a second acquisition module for acquiring the current displacement value of the pull rod displacement sensor, the current angles of the first angle sensor, and the second angle sensor in the measuring device after the abdomen of the test dummy is impacted; a second determination module for determining the current coordinates of the measurement point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor, the current angles of the first angle sensor, and the second angle sensor; and a measurement module for obtaining the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measurement point and the current coordinates of the measurement point.

[0156] In this way, the technical solution provided by this application can determine the compressive displacement components of the dummy's abdomen in three directions through a simple measuring device consisting of a pull rod displacement sensor and two angle sensors, so as to measure the spatial displacement caused by the impact on the dummy's abdomen, thereby improving the accuracy of measuring the deformation of the dummy's abdomen.

[0157] Please refer to Figure 9 , which is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. As shown in Figure 9 , the electronic device 900 includes a processor 910 , a memory 920 , and a bus 930 .

[0158] The memory 920 stores machine-readable instructions executable by the processor 910. When the electronic device 900 is running, the processor 910 communicates with the memory 920 via the bus 930. When the machine-readable instructions are executed by the processor 910, the steps of the method for measuring the abdominal displacement of the test dummy in the method embodiment shown in Figures 1 and 2 above can be performed. The specific implementation method can be found in the method embodiment and will not be repeated here.

[0159] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the computer program can execute the steps of the method for measuring the abdominal displacement of a test dummy in the method embodiments shown in FIG. 1 and FIG. 2 . The specific implementation method can be found in the method embodiments and will not be described in detail here.

[0160] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0161] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0162] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0163] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0164] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0165] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for measuring abdominal displacement of a test dummy, characterized in that: A measuring device for abdominal displacement of a test dummy, the measuring device comprising a rod displacement sensor, a first angle sensor, a second angle sensor, a connecting piece, a universal joint and a sensor base; the front end of the universal joint is connected to the abdominal surface of the test dummy; the end of the universal joint is connected to the front end of the rod displacement sensor, and the end of the rod displacement sensor is respectively connected to the rotating shafts of the first angle sensor and the second angle sensor through a connecting piece; the first angle sensor is fixed to the thoracic vertebra of the test dummy through the sensor base; the measuring method comprises: Acquire the design parameters of the measuring device in a pre-established coordinate system, as well as the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor in the measuring device; The point where the front end of the universal joint is connected to the abdominal surface of the test dummy is used as a measuring point, and based on the design parameters and the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor, the initial coordinates of the measuring point when the abdomen of the test dummy is not impacted are determined; After the abdomen of the test dummy is impacted, obtaining a current displacement value of a pull rod displacement sensor, and current angles of a first angle sensor and a second angle sensor in the measuring device; Determine the current coordinates of the measuring point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor; Based on the initial coordinates of the measuring points and the current coordinates of the measuring points, a three-dimensional displacement of the compressed abdomen of the test dummy is obtained.

2. The measuring method according to claim 1, characterized in that: The design parameters include a first distance and a second distance; the first distance is a vertical distance from the axis of the second angle sensor to the connecting plane of the sensor base and the thoracic vertebra; the second distance is a vertical distance from the axis of the first angle sensor to the axis of the pull rod displacement sensor; the step of determining the initial coordinates of the measuring point when the abdomen of the test dummy is not impacted based on the design parameters and the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor, comprises: Substituting the second distance, the initial displacement value of the pull rod displacement sensor, the first angle sensor and the initial angle of the second angle sensor into a first preset formula to obtain an initial horizontal axis coordinate; Substituting the first distance, the initial displacement value of the pull rod displacement sensor and the initial angle of the second angle sensor into a second preset formula to obtain an initial longitudinal axis coordinate; wherein the first angle sensor measures the angle between the axis of the second angle sensor and the Z axis in the coordinate system; and the second angle sensor measures the angle between the pull rod displacement sensor and the X axis in the coordinate system; Substituting the second distance, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor into a third preset formula to obtain an initial vertical axis coordinate; A combination of the initial horizontal axis coordinate, the initial vertical axis coordinate and the initial vertical axis coordinate is determined as the initial coordinate of the measurement point when the abdomen of the test dummy is not impacted.

3. The measuring method according to claim 2, characterized in that: The step of determining the current coordinates of the measuring point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor comprises: Substituting the second distance, the current displacement value of the pull rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor into a fourth preset formula to obtain a current horizontal axis coordinate; Substituting the first distance, the current displacement value of the pull rod displacement sensor, and the current angle of the second angle sensor into a fifth preset formula to obtain a current longitudinal axis coordinate; Substituting the second distance, the current displacement value of the pull rod displacement sensor, and the current angles of the first angle sensor and the second angle sensor into a sixth preset formula to obtain a current vertical axis coordinate; A combination of the current horizontal axis coordinate, the current vertical axis coordinate and the current vertical axis coordinate is determined as the current coordinate of the measuring point when the abdomen of the test dummy is impacted.

4. The measuring method according to claim 3, characterized in that: The first preset formula is the formula when the measurement time parameter in the fourth preset formula is zero; the second preset formula is the formula when the measurement time parameter in the fifth preset formula is zero; The third preset formula is a formula when the measurement time parameter in the sixth preset formula is zero.

5. The measuring method according to claim 1, characterized in that: The step of obtaining the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measuring points and the current coordinates of the measuring points comprises: Determine the difference between the current horizontal axis coordinate in the current coordinates of the measuring point and the initial horizontal axis coordinate in the initial coordinates of the measuring point as the current horizontal displacement; Determine the difference between the current longitudinal axis coordinate in the current coordinate of the measuring point and the initial longitudinal axis coordinate in the initial coordinate of the measuring point as the current longitudinal displacement; Determine the difference between the current vertical axis coordinate in the current coordinates of the measuring point and the initial vertical axis coordinate in the initial coordinates of the measuring point as the current vertical displacement; A combination of the current lateral displacement, the current longitudinal displacement and the current vertical displacement is determined as a three-dimensional displacement of the compressed abdomen of the test dummy.

6. The measuring method according to claim 1, characterized in that: The measuring method further comprises: The three-dimensional displacement of the left side of the abdomen of the test dummy under compression is obtained by means of a measuring device fixed to the left side of the thoracic vertebra of the test dummy; The three-dimensional displacement of the right side of the abdomen of the test dummy under compression is obtained by means of a measuring device fixed to the right side of the thoracic vertebra of the test dummy; Determine an average displacement of the test dummy's abdomen being compressed by the three-dimensional displacement of the left side of the test dummy's abdomen being compressed and the three-dimensional displacement of the right side of the test dummy's abdomen being compressed; Determining whether the average displacement of the compressed abdomen of the test dummy is within a preset abdominal reference displacement range; If so, the bionic performance of the abdomen of the test dummy is determined to be up to standard.

7. A device for measuring abdominal displacement of a test dummy, characterized in that: A measuring device for abdominal displacement of a test dummy, the measuring device comprising a rod displacement sensor, a first angle sensor, a second angle sensor, a connecting piece, a universal joint and a sensor base; the front end of the universal joint is connected to the abdominal surface of the test dummy; the end of the universal joint is connected to the front end of the rod displacement sensor, and the end of the rod displacement sensor is respectively connected to the rotating shafts of the first angle sensor and the second angle sensor through a connecting piece; the first angle sensor is fixed to the thoracic vertebra of the test dummy through the sensor base; the measuring device comprises: A first acquisition module, used to acquire design parameters of the measuring device in a pre-established coordinate system, as well as an initial displacement value of a pull rod displacement sensor, and initial angles of a first angle sensor and a second angle sensor in the measuring device; a first determination module, configured to use a point where the front end of the universal joint is connected to the abdominal surface of the test dummy as a measurement point, and determine the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor; A second acquisition module is used to acquire the current displacement value of the rod displacement sensor, the current angles of the first angle sensor and the second angle sensor in the measuring device after the abdomen of the test dummy is impacted; A second determination module is used to determine the current coordinates of the measurement point when the abdomen of the test dummy is impacted based on the current displacement value of the pull rod displacement sensor and the current angles of the first angle sensor and the second angle sensor; The measuring module is used to obtain the three-dimensional displacement of the compressed abdomen of the test dummy based on the initial coordinates of the measuring point and the current coordinates of the measuring point.

8. The measuring device according to claim 7, characterized in that The design parameters include a first distance and a second distance; the first distance is a vertical distance from the axis of the second angle sensor to the connecting plane of the sensor base and the thoracic vertebra; the second distance is a vertical distance from the axis of the first angle sensor to the axis of the pull rod displacement sensor; when the first determination module is used to determine the initial coordinates of the measurement point when the abdomen of the test dummy is not impacted based on the design parameters and the initial displacement value of the pull rod displacement sensor, the initial angles of the first angle sensor and the second angle sensor, the first determination module is specifically used to: Substituting the second distance, the initial displacement value of the pull rod displacement sensor, the first angle sensor and the initial angle of the second angle sensor into a first preset formula to obtain an initial horizontal axis coordinate; Substituting the first distance, the initial displacement value of the pull rod displacement sensor and the initial angle of the second angle sensor into a second preset formula to obtain an initial longitudinal axis coordinate; wherein the first angle sensor measures the angle between the axis of the second angle sensor and the Z axis in the coordinate system; and the second angle sensor measures the angle between the pull rod displacement sensor and the X axis in the coordinate system; Substituting the second distance, the initial displacement value of the pull rod displacement sensor, and the initial angles of the first angle sensor and the second angle sensor into a third preset formula to obtain an initial vertical axis coordinate; A combination of the initial horizontal axis coordinate, the initial vertical axis coordinate and the initial vertical axis coordinate is determined as the initial coordinate of the measurement point when the abdomen of the test dummy is not impacted.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are run by the processor, the steps of the method for measuring the abdominal displacement of a test dummy as described in any one of claims 1 to 6 are executed.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for measuring abdominal displacement of a test dummy according to any one of claims 1 to 6 are executed.

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