A vehicle crash test dummy h-point measurement device

Abstract

The application discloses a kind of vehicle collision test dummy H point measuring devices, including dummy;The pelvis of dummy is connected with the pull line pull-out end of X direction pull line displacement sensor and Z direction pull line displacement sensor respectively;The pull line of X direction pull line displacement sensor is pulled out along the horizontal direction forward and then connected with the pelvis of dummy;The pull line of Z direction pull line displacement sensor is pulled out along the vertical direction upward and then connected with the pelvis of dummy;X direction pull line displacement sensor and Z direction pull line displacement sensor are respectively used to output the displacement of dummy H point in X direction and Z direction during collision test process;Data collector is connected with X direction pull line displacement sensor and Z direction pull line displacement sensor respectively;Data processing unit is connected with data collector, for obtaining the real-time position of dummy H point in real-time collision process, the real-time position of dummy H point in collision process can be reliably obtained in real time by the application, and it has great practical significance.

Description

Technical Field

[0001] This invention relates to the field of vehicle collision testing technology, and in particular to a vehicle collision test dummy H-point measuring device for real-time reading of the dummy's H-point position during the collision process. Background Technology

[0002] Currently, vehicle safety is receiving increasing attention. Vehicle crash testing is a crucial step in vehicle safety research. Given the inherent danger and destructive nature of crash testing, it is necessary to use crash dummies to study and evaluate the vehicle's safety performance, rather than using real people.

[0003] The H-point of a dummy, or hip point, is the connection point between the torso and thigh in a dummy. In the human template, it is the hip joint. This point is often used as a positioning reference point to determine the position of the seat and other related interior components.

[0004] The H-point of the crash test dummy is the hinge point connecting the pelvis and thigh, and is a key feature point for measuring the dummy's motion posture. In automotive crash tests, the trajectory of the dummy's H-point is an important evaluation indicator. The horizontal component of the H-point displacement characterizes the restraint capability of the seat and restraint system on the occupant, while the vertical component helps confirm whether the seat has experienced a "subsidence" phenomenon.

[0005] Currently, industry and enterprise standards for automotive seat testing set limits on the horizontal and vertical displacement of point H. If these limits are exceeded, the product is considered unqualified.

[0006] However, based on the existing displacement measurement technology of the dummy's H point in the crash test, it is necessary to analyze the data through high-speed cameras and perform data calculations to obtain the position of the dummy's H point in the crash test. The entire analysis and data calculation process is complex, takes a lot of time, is not real-time, and cannot meet the needs of automotive safety performance testing units. Summary of the Invention

[0007] The purpose of this invention is to address the technical deficiencies of existing technologies by providing a device for measuring the H-point of a vehicle collision test dummy.

[0008] To this end, the present invention provides a vehicle collision test dummy H-point measurement device, including a dummy, an X-direction wire displacement sensor, a Z-direction wire displacement sensor, a data acquisition unit, and a data processing unit;

[0009] The pelvis of the dummy is connected to the pull-out end of the X-axis wire displacement sensor and the pull-out end of the Z-axis wire displacement sensor, respectively.

[0010] The X-axis wire displacement sensor has a wire that is pulled forward horizontally and connected to the dummy's pelvis. The horizontal forward direction is the X-axis.

[0011] The Z-direction wire displacement sensor's wire is pulled upwards vertically and connected to the dummy's pelvis; the vertical upward direction is the Z-direction.

[0012] The X-axis wire displacement sensor is used to output the displacement of the dummy's H point in the X direction to the data acquisition unit during a crash test.

[0013] Z-axis wire displacement sensor is used to output the displacement of the dummy's H point in the Z direction to the data acquisition unit during a crash test;

[0014] The data acquisition unit has its signal acquisition terminals connected to the signal output terminals of the X-direction wire displacement sensor and the Z-direction wire displacement sensor, respectively. It is used to collect and record the displacement of the dummy's H point in the X direction and the displacement in the Z direction in real time, and send them to the data processing unit.

[0015] The data processing unit, connected to the data acquisition unit, is used to pre-establish an XOZ two-dimensional coordinate system, record and mark the initial position coordinates of point H on the dummy, and receive in real time the displacement of point H on the dummy in the X direction and the displacement in the Z direction sent by the data acquisition unit. Based on the initial position coordinates of point H on the dummy, the real-time position coordinates of point H on the dummy during the real-time collision are obtained, that is, the real-time position of point H on the dummy during the real-time collision is obtained.

[0016] As can be seen from the technical solution provided by the present invention above, compared with the prior art, the present invention provides a vehicle collision test dummy H-point measuring device, which is scientifically designed and can obtain the real-time position of the dummy's H-point during the collision process in a real-time, accurate and reliable manner, and has significant practical significance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a vehicle collision test dummy H-point measuring device provided by the present invention;

[0018] In the figure, 1 is a dummy, 2 is the H-point clamp, 3 is the H-point fixed position frame, 4 is the first fixed pulley, and 5 is the X-direction pull wire displacement sensor.

[0019] 6 is the data acquisition unit, 7 is the data processing unit, 8 is the Z-axis wire displacement sensor, 9 is the second fixed pulley, 10 is the data acquisition unit mounting bracket, and 11 is the vehicle platform. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, it should first be noted that point H is the hinge point connecting the dummy's pelvis and thigh, and is a key feature point for measuring the dummy's movement posture.

[0025] It should also be noted that, in the present invention, in the car crash test, the dummy is placed on the seat. During the collision, the dummy moves forward relative to the seat. The trajectory of the dummy's H point is the combination of the horizontal forward displacement and the vertical displacement of the dummy's H point relative to the seat.

[0026] See Figure 1 The present invention provides a vehicle collision test dummy H-point measuring device, including a dummy 1, an X-direction wire displacement sensor 5, a Z-direction wire displacement sensor 8, a data acquisition unit 6, and a data processing unit 7;

[0027] Among them, the pelvis of the dummy 1 is connected to the pull-out end of the X-direction pull-out sensor 5 and the pull-out end of the Z-direction pull-out sensor 8 respectively (specifically, it is a rigid connection and a linkage connection, for example, a linkage connection through mechanical parts such as clamps).

[0028] The X-direction wire displacement sensor 5 has a wire that is pulled forward in the horizontal direction and connected to the pelvis of the dummy 1. The horizontal forward direction is the X direction.

[0029] The Z-direction wire displacement sensor 8 has a wire that is pulled upwards in a vertical direction and connected to the pelvis of the dummy 1. The vertical upward direction is the Z-direction.

[0030] X-direction wire displacement sensor 5 is used to output the displacement of point H of dummy 1 in the X direction to data acquisition device 6 during the collision test;

[0031] Z-direction wire displacement sensor 8 is used to output the displacement of point H of dummy 1 in the Z direction to data acquisition unit 6 during the collision test;

[0032] It should be noted that the X-direction wire displacement sensor 5 and the Z-direction wire displacement sensor 8 can detect the displacement of the dummy 1 as a whole and point H on it in the X and Z directions.

[0033] The data acquisition unit 6 has its signal acquisition terminals connected to the signal output terminals of the X-direction wire displacement sensor 5 and the Z-direction wire displacement sensor 8, respectively. It is used to collect and record the displacement of point H of the dummy 1 in the X direction and the displacement in the Z direction (which is equal to the displacement of point H on the dummy 1 at its initial position) in real time, and send it to the data processing unit 7.

[0034] The data processing unit 7 is connected to the data acquisition unit 6 (specifically, through a communication connection). It is used to pre-establish an XOZ two-dimensional coordinate system, record and mark the initial position coordinates of point H on the dummy 1, and receive in real time the displacement of point H on the dummy 1 in the X direction and the displacement in the Z direction sent by the data acquisition unit 6. Based on the initial position coordinates of point H on the dummy 1, it obtains the real-time position coordinates of point H on the dummy during the real-time collision, that is, it obtains the real-time position of point H on the dummy during the real-time collision.

[0035] It should be noted that the initial coordinates of point H on dummy 1 are the positions of point H on the dummy before the start of the collision test, and are positions known in advance.

[0036] It should be noted that, for this invention, a coordinate system XOZ is pre-established, including an X-axis (i.e., the X-direction axis) and a Z-axis (i.e., the Z-direction axis). The origin of this coordinate system XOZ is the intersection of the X-axis and the Z-axis (for example, any point below and behind the pelvis of the dummy placed on the seat). The horizontal forward direction is the X-direction, and the vertical upward direction is the Z-direction. The dummy remains stationary relative to the ground throughout the entire collision process. Before conducting the collision test, the initial position coordinates of point H on dummy 1 in the XOZ coordinate system can be obtained in advance.

[0037] In this invention, specifically, the pelvis of the dummy 1 is rigidly connected to the pull-out end of the X-direction pull-out sensor 5 and the pull-out end of the Z-direction pull-out sensor 8, respectively. Therefore, the displacement of the dummy 1 as a whole (including the initial position coordinates of point H on it) in the X and Z directions can be reliably detected by the X-direction pull-out sensor 5 and the Z-direction pull-out sensor 8.

[0038] It should be noted that during a vehicle collision, the position of the dummy's H point will change, thereby causing the pull wires of the X-direction pull wire displacement sensor 5 and the Z-direction pull wire displacement sensor 8 to move. Through the acquisition by the X-direction pull wire displacement sensor 5 and the Z-direction pull wire displacement sensor 8, the displacement of the dummy's H point in the X and Z directions can be collected respectively. Finally, after analysis and processing, the real-time position of the dummy's H point and the real-time position change curve can be output.

[0039] In this invention, specifically, the data acquisition device 6 is disposed on the top of the data acquisition device fixing bracket 10;

[0040] A vertically distributed data acquisition unit mounting bracket 10 is installed on the top of the vehicle platform 11.

[0041] In this invention, specifically, the pull wire of the X-direction pull wire displacement sensor 5 is pulled forward in the horizontal direction after passing around the first fixed pulley 4, and its pull-out end is connected to the pelvis of the dummy 1 (specifically, a linkage connection).

[0042] The cable of the Z-axis cable displacement sensor 8 is pulled upward in the vertical direction after passing around the second fixed pulley 9, and its pulled end is connected to the pelvis of the dummy 1 (specifically, a linkage connection).

[0043] In practice, the first fixed pulley 4 and the second fixed pulley 9 are respectively set in the car body (inner bottom surface of the vehicle interior space) or connected to the data acquisition device fixing bracket 10 or the vehicle platform 11 through a separate fixed pulley bracket.

[0044] In this invention, specifically, an H-point clamp 2 is fixedly installed on the pelvis of the dummy 1;

[0045] The H-point fixture 2 has one end protruding from the surface of the dummy 1;

[0046] The H-point clamp 2 has an H-point fixing position frame 3 fixedly installed on one end of the dummy 1 that is exposed on the surface of the dummy 1;

[0047] The X-direction draw wire displacement sensor 5 has a draw wire that is pulled forward in the horizontal direction and connected to the H-point fixed position frame 3.

[0048] The Z-axis draw wire displacement sensor 8 has a draw wire that is pulled upwards in the vertical direction and connected to the H-point fixed position frame 3.

[0049] It should be noted that the H-point clamp 2 can be an existing clamp, as long as it can be firmly connected to a certain position on the pelvis of the dummy 1.

[0050] In practice, the H-point clamp 2 is a rod that is inserted into the dummy's pelvis and is fixedly connected to the dummy's pelvis.

[0051] In practice, the H-point fixed position frame 3 is located below and behind the dummy's pelvis.

[0052] In practice, the bottom of the H-point fixed position frame 3 is connected to the pull-out end of the X-direction pull-line displacement sensor 5 and the pull-out end of the Z-direction pull-line displacement sensor 8 (specifically, it is a rigid connection).

[0053] In specific implementation, the bottom of the fixed position frame 3 at point H is preferably the origin of the coordinate system XOZ.

[0054] In this invention, specifically, the data processing unit 7 performs coordinate processing in real time based on the displacement of point H of the dummy 1 in the X direction and the displacement in the Z direction sent by the data collector 6, as well as the initial position coordinates of point H on the dummy 1, so as to obtain the real-time position coordinates of point H of the dummy during the real-time collision.

[0055] For example, the initial position coordinates of point H of dummy 1 are (X0, Z0); at a certain time point during the real-time collision process (e.g., when the collision has been going on for 1 second), the displacement of point H of dummy 1 in the X direction is △X, and the displacement of point H of dummy 1 in the Z direction is △Y. Then, the real-time position coordinates of point H of dummy 1 at this time point during the real-time collision process are (X0+△X, Z0+△Y), and the position at this time point can be determined.

[0056] If the collision process lasts for a preset duration (e.g., 5 seconds), multiple positions of point H of dummy 1 can be obtained in real time and dynamically within this duration (i.e., multiple dynamically changing positions).

[0057] In specific implementation, the data processing unit 7 is also used to mark the real-time position coordinates of the dummy H point in the coordinate system XOZ after obtaining the real-time position coordinates of the dummy H point during the real-time collision, and to connect the marked multiple position points in sequence (specifically, to connect any two adjacent position points) to generate the real-time position curve (i.e., the real-time position coordinate curve) of the dummy H point during the real-time collision.

[0058] It should be noted that if the data processing unit 7 has its own display screen, it can directly display the real-time position curve of the dummy's H point during the real-time collision process; otherwise, it will display the position through a connected external display screen.

[0059] In specific implementation, the data processing unit 7 can be a programmable logic controller (PLC), a central processing unit (CPU), a digital signal processor (DSP), or a microcontroller (MCU), or it can be an industrial computer or an industrial tablet PC.

[0060] In this invention, specifically, the data acquisition device 6 is an existing data acquisition instrument capable of reading the displacement data output by the wire displacement sensor.

[0061] In this invention, specifically, the vehicle platform 11 is specifically located on the inner bottom surface of the vehicle's interior space.

[0062] In this invention, specifically, the position of point H on the dummy is measured by a high-precision pull-wire displacement sensor: the pull-out ends of the X-axis pull-wire displacement sensor and the Z-axis pull-wire displacement sensor are fixedly connected to the H-point fixed position frame, and it is necessary to ensure that the direction is absolutely horizontal and vertical. The fixed connection method is not limited to adhesive or riveting.

[0063] In this invention, specifically, the H-point clamp can be a rod inserted into the dummy's pelvis, which can be appropriately lengthened or shortened, and needs to be matched with the vehicle platform or vehicle fixed position.

[0064] In this invention, specifically, the fixed pulley used in this invention can be fixed to the data acquisition device or the data acquisition device fixing bracket by a corresponding bracket;

[0065] In this invention, specifically, the size of the data acquisition device mounting bracket can be appropriately adjusted according to the vehicle platform or vehicle shape.

[0066] To better understand the technical solution of the present invention, the working principle of the present invention is explained below.

[0067] In this invention, a dummy is fixed to the seat of a vehicle, and an H-point clamp 2 is fixed at the pelvic position of the dummy. The H-point clamp 2 is connected to an H-point fixing frame 3. The H-point fixing frame is further connected to two pull-line displacement sensors: an X-direction pull-line displacement sensor 5 and a Z-direction pull-line displacement sensor 8. The pull-line end of the pull rope of the X-direction pull-line displacement sensor 5, which is pulled along the horizontal X direction, is connected to the H-point fixing frame 3. The pull-line end of the pull rope of the Z-direction pull-line displacement sensor 8, which is pulled along the vertical Z direction, is connected to the H-point fixing frame 3.

[0068] By collecting data from the X-direction wire displacement sensor 5 and the Z-direction wire displacement sensor 8, the displacement of point H of the dummy in the X and Z directions can be collected respectively.

[0069] The data acquisition unit 6, which establishes data communication with the X-direction wire displacement sensor 5 and the Z-direction wire displacement sensor 8, will collect and record the motion displacement of the two wire displacement sensors during the collision. Finally, the data collected by the data acquisition unit is output to the data processing unit 7. The data processing unit 7 performs coordinate processing on the displacement collected in the X direction and the displacement collected in the Z direction to generate a readable real-time position curve of point H during the collision process.

[0070] Compared with the prior art, the vehicle collision test dummy H-point measuring device provided by the present invention has the following beneficial effects:

[0071] 1. This invention uses a high-precision wire displacement sensor to read the position of point H in real time during the collision process, which is beneficial for the identification of the dummy's position and subsequent motion analysis.

[0072] 2. This invention is applicable to vehicles with or without doors. Considering the limited space in vehicles with doors, the interior door panel needs to be removed to fix the two fixed pulleys and the data acquisition device mounting bracket.

[0073] In summary, compared with the prior art, the vehicle collision test dummy H-point measuring device provided by the present invention is scientifically designed and can obtain the real-time position of the dummy's H-point during the collision process in a real-time, accurate and reliable manner, which has significant practical significance.

[0074] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for measuring the H-point of a vehicle collision test dummy, characterized in that, It includes a dummy (1), an X-axis wire displacement sensor (5), a Z-axis wire displacement sensor (8), a data acquisition unit (6), and a data processing unit (7); Among them, the pelvis of the dummy (1) is connected to the pull-out end of the X-direction pull-out sensor (5) and the pull-out end of the Z-direction pull-out sensor (8), respectively. The pull wire of the X-direction pull wire displacement sensor (5) is pulled forward along the horizontal direction and connected to the pelvis of the dummy (1). The horizontal forward direction is the X direction. The pull wire of the Z-direction pull wire displacement sensor (8) is pulled out vertically upward and connected to the pelvis of the dummy (1). The vertical upward direction is the Z direction. X-direction wire displacement sensor (5) is used to output the displacement of the H point of the dummy (1) in the X direction to the data acquisition unit (6) during the collision test. Z-direction wire displacement sensor (8) is used to output the displacement of the H point of the dummy (1) in the Z direction to the data acquisition unit (6) during the collision test. The data acquisition unit (6) has its signal acquisition end connected to the signal output end of the X-direction wire displacement sensor (5) and the signal output end of the Z-direction wire displacement sensor (8) respectively. It is used to collect and record the displacement of the H point of the dummy (1) in the X direction and the displacement in the Z direction in real time, and send it to the data processing unit (7). The data processing unit (7) is connected to the data acquisition unit (6) and is used to pre-establish the XOZ two-dimensional coordinate system, record and mark the initial position coordinates of the H point on the dummy (1), and receive the displacement of the H point of the dummy (1) in the X direction and the displacement in the Z direction sent by the data acquisition unit (6) in real time. Based on the initial position coordinates of the H point on the dummy (1), the real-time position coordinates of the H point of the dummy during the real-time collision are obtained, that is, the real-time position of the H point of the dummy during the real-time collision is obtained. An H-point clamp (2) is fixedly installed on the pelvis of the dummy (1); The H-point clamp (2) has one end protruding from the surface of the dummy (1); The H-point clamp (2) has an H-point fixing position frame (3) fixedly installed on one end of the dummy (1) that is exposed on the surface of the dummy. The X-direction pull-wire displacement sensor (5) has a pull wire that is pulled forward in the horizontal direction and connected to the H-point fixed position frame (3); The pull wire of the Z-direction pull wire displacement sensor (8) is pulled upward along the vertical direction and connected to the H-point fixed position frame (3); H-point clamp (2), specifically a rod that is inserted into the pelvis of a dummy; H-point fixed position frame (3) is located below and behind the pelvis of the dummy; The bottom of the H-point fixed position frame (3) is connected to the pull-out end of the X-direction pull-line displacement sensor (5) and the pull-out end of the Z-direction pull-line displacement sensor (8); The bottom of the fixed position frame (3) at point H is used as the origin of the coordinate system XOZ.

2. The vehicle collision test dummy H-point measuring device as described in claim 1, characterized in that, The pelvis of the dummy (1) is rigidly connected to the pull-out end of the X-direction pull-out sensor (5) and the pull-out end of the Z-direction pull-out sensor (8), respectively.

3. The vehicle collision test dummy H-point measuring device as described in claim 1, characterized in that, The cable of the X-axis cable displacement sensor (5) is pulled forward in the horizontal direction after passing around the first fixed pulley (4), and its pulled end is connected to the pelvis of the dummy (1). The cable of the Z-direction cable displacement sensor (8) is pulled upward in the vertical direction after passing over the second fixed pulley (9), and its pulled end is connected to the pelvis of the dummy (1).

4. The vehicle collision test dummy H-point measuring device as described in claim 1, characterized in that, The data acquisition unit (6) is mounted on top of the data acquisition unit mounting bracket (10); A vertically distributed data acquisition device mounting bracket (10) is installed on the top of the vehicle platform (11).

5. The vehicle crash test dummy H-point measuring device as described in any one of claims 1 to 4, characterized in that, The data processing unit (7) is also used to mark the real-time position coordinates of the dummy H point in the coordinate system XOZ after obtaining the real-time position coordinates of the dummy H point during the real-time collision, and to connect the marked multiple position points in sequence to generate the real-time position curve of the dummy H point during the real-time collision.

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