Child safety seat high-altitude falling collision test system and method

Abstract

The invention discloses a high-altitude falling collision test system and method for a child safety seat. The system is characterized in that an experimental test object is fixed in a safety seat to be experimented, a data sensor and a collision marker are arranged in the experimental test object, and the data sensor is connected with a data acquisition and analysis module; the to-be-tested safety seat is installed in a preset seat position of the first test vehicle; the vehicle lifting module lifts the first test vehicle to a preset falling height; a trigger sensor is arranged in the second test vehicle and is connected with the data acquisition and analysis module; at least one in-vehicle high-speed camera is arranged in the first test vehicle, the in-vehicle high-speed camera is used for shooting an experimental test object, and the in-vehicle high-speed camera is connected with the data acquisition and analysis module; according to the invention, comprehensive safety testing can be carried out on the child safety seat in a high-altitude falling mode, and the accuracy of testing the child safety seat is improved by simulating the real motion state of vehicle collision.

Description

Technical Field

[0001] The invention relates to the field of safety seat testing, and in particular to a high-altitude drop collision testing system and method for a child safety seat. Background Art

[0002] Child safety seats are car safety devices designed specifically for children, which can permanently improve the safety of children riding in cars. The safety test of child safety seats is carried out through simulation experiments simulating real traffic accidents, and the damage to the test dummy caused by the child safety seat during the simulation experiment is observed to see whether it meets the requirements of the national standards for motor vehicle restraint systems. The current simulation experiment mainly involves installing the child safety seat in a trolley, accelerating the trolley to 50km / h, and simulating a collision. However, the technical solutions of the existing technology have certain limitations. The trolley simulation can only realize the impact of speed on the child safety seat, and cannot fully simulate the protection of the child by the child safety seat under the condition of a real car collision. Summary of the invention

[0003] The invention provides a child safety seat high-altitude drop collision test system and method, so as to solve the technical problem that the safety protection performance of the child safety seat in a traffic accident cannot be tested.

[0004] According to one aspect of the present invention, a child safety seat high-altitude drop collision test system is provided, comprising a vehicle lifting module, a first test vehicle, a second test vehicle, a safety seat to be tested, an experimental test object and a data acquisition and analysis module; wherein:

[0005] The experimental test object is fixed in the safety seat to be tested, a data sensor and a collision marker are set in the experimental test object, and the data sensor is connected to the data acquisition and analysis module;

[0006] The safety seat to be tested is installed in the preset seat position of the first test vehicle;

[0007] The vehicle lifting module lifts the first test vehicle to a preset drop height;

[0008] A trigger sensor is provided in the second test vehicle, and the trigger sensor is connected to the data acquisition and analysis module;

[0009] At least one in-vehicle high-speed camera is arranged in the first test vehicle, and the in-vehicle high-speed camera is used to photograph the experimental test object, and the in-vehicle high-speed camera is connected to the data acquisition and analysis module;

[0010] The data acquisition and analysis module receives the collision trigger signal sent by the trigger sensor and generates a data acquisition signal and a video acquisition signal;

[0011] The data acquisition and analysis module sends the data acquisition signal to the data sensor, and collects the collision test data according to the data acquisition signal through the data sensor;

[0012] The data acquisition and analysis module sends the data acquisition signal to the in-vehicle camera, and the in-vehicle camera collects the collision image in the vehicle according to the video acquisition signal;

[0013] The data acquisition and analysis module determines the test results of the safety seat to be tested based on the collision test data and the in-vehicle collision image.

[0014] According to another aspect of the present invention, a method for testing a child safety seat from a height drop to a collision is provided, which is applied to a child safety seat from a height drop to a collision test system according to any embodiment of the present invention, comprising:

[0015] When a collision trigger signal is received, a data acquisition signal and a video acquisition signal are generated;

[0016] Collect collision test data according to the data acquisition signal;

[0017] Collecting collision images inside the vehicle according to video acquisition signals;

[0018] The test results of the safety seat to be tested are determined based on the collision test data and the in-vehicle collision images.

[0019] The technical solution of the embodiment of the present invention realizes a complete simulation of the real car collision in a real traffic accident by directly installing the child safety seat to be tested in the test vehicle and selecting two test vehicles for real collision; in the simulation process, the test vehicle is selected to be lifted to mid-air through the vehicle lifting module to perform a high-altitude drop collision of a free fall body, which can effectively control the collision speed of the test vehicle, reduce the influence of experimental errors on the experimental results, and reduce the test cost; and a trigger sensor and a data sensor are set in the collision vehicle, and when the vehicle collides, data collection is triggered to reduce data interference in the data collection process and improve the accuracy of the experiment; and at the same time, an in-vehicle high-speed camera is installed in the experimental vehicle, and a collision marker is set in the test dummy, and the protection of the child safety seat against vehicle collision injuries during the vehicle collision is effectively observed through video acquisition and collision markers, and the safety of the child safety seat is further tested and evaluated. The technical problem that the safety protection performance of the child safety seat in a traffic accident cannot be tested in the prior art is solved, and the vehicle collision experiment at different speeds is realized, which can effectively detect the safety of the child safety seat.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A structural schematic diagram of a high-altitude drop collision test system for a child safety seat is provided for an embodiment of the present invention;

[0023] Figure 2 It is an enlarged schematic diagram of the first test vehicle;

[0024] Figure 3 A flowchart of a high-altitude drop collision test method for a child safety seat provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] Figure 1 The present invention provides a schematic diagram of a high-altitude drop collision test system for a child safety seat. Figure 2 This is an enlarged schematic diagram of the first test vehicle, see Figure 1 and Figure 2The embodiment of the present invention can be applied to the technical scenario of performing collision test on the safety of child safety seats. The system is composed of a vehicle lifting module 10, a first test vehicle 20, a second test vehicle 30, a safety seat to be tested 40, an experimental test object 50 and a data acquisition and analysis module 60; wherein,

[0028] The experimental test object 50 is fixed to the safety seat 40 to be tested, and a data sensor and a collision marker are set in the experimental test object 50 . The data sensor is in communication connection with the data acquisition and analysis module 60 .

[0029] Optionally, the experimental test object 50 may be a child safety test dummy, which is a tool specially designed to simulate the impact that a child may suffer in a traffic accident. The child safety test dummy selected by the experimental test object 50 may be a Q series child dummy, including a Q1.5 dummy and a Q3 dummy, wherein the Q1.5 dummy simulates an 18-month-old child and the Q3 dummy simulates a 3-year-old child. The installation method of the experimental test object 50 is as follows: when the experimental test object 50 is a Q1.5 dummy, the experimental test object 50 is installed in reverse, and the head support gear and shoulder belt position of the safety seat 40 to be tested are adjusted to appropriate positions with reference to the instruction manual of the selected safety seat 40 to be tested and the method for installing the child safety test dummy of the UN129 dynamic test, the seat gear is adjusted to the tilt gear, and the seat belt that restrains the dummy is tightened to an appropriate tightness; when the experimental test object 50 is a Q3 dummy, the experimental test object 50 is installed in the forward direction, and the head support gear and shoulder belt position of the safety seat 40 to be tested are adjusted to appropriate positions with reference to the instruction manual of the selected safety seat 40 to be tested and the method for installing the child safety test dummy of the UN129 dynamic test, the seat gear is adjusted to the upright gear, and the seat belt that restrains the dummy is tightened to an appropriate tightness.

[0030] Optionally, the collision marker can be used to identify the part of the experimental test object 50 that contacts the vehicle during the collision process; after the experimental test object 50 is installed in the safety seat 40 to be tested, in order to detect whether the experimental test object 50 is injured by the collision, a collision marker can be set in the experimental test object 50 to identify whether the experimental test object 50 is injured by the collision through the collision marker. Exemplarily, when detecting whether the head of the experimental test object 50 is injured during the vehicle collision process, paint is selected on the head of the experimental test object 50 as a collision marker.

[0031] Optionally, the data collector can be a sensor for collecting data of the experimental test object 50; it should be noted that in the high-altitude fall and collision of the child safety seat, the experimental test object 50 will be affected by the vehicle acceleration and collision, and the experimental test object 50 will be displaced in the safety seat to be tested 40 and subjected to pressure. Therefore, the data collector needs to select acceleration sensors, torque sensors, displacement sensors and pressure sensors, and select 32-channel data collection and have impact resistance functions.

[0032] Optionally, when the data collector is installed, in order to comprehensively record the injuries suffered by the experimental test object 50 in a high-altitude fall and collision, acceleration sensors are selected to be set on the head and chest of the experimental test object 50 in the X, Y and Z directions, and the acceleration sensors are set to be communicatively connected with the data acquisition and analysis module 60, a torque sensor is set on the upper neck, and the torque sensor is set to be communicatively connected with the data acquisition and analysis module 60, a posture sensor is set on the chest, and the posture sensor is set to be communicatively connected with the data acquisition and analysis module 60, and a pressure sensor is set on the abdomen, and the pressure sensor is set to be communicatively connected with the data acquisition and analysis module 60.

[0033] Specifically, the safety seat 40 to be tested is installed in a preset seat position of the first test vehicle 20. The preset seat position may be the left rear seat and the right rear seat of the test vehicle, and two safety seats 40 to be tested may be installed in the rear seats of the first test vehicle 20 at the same time. For a specific installation method, refer to the installation and use instructions of the safety seat 40 to be tested.

[0034] The first test vehicle 20 can be a test vehicle for dropping from a high altitude, and the first test vehicle 20 needs to be a car that can be driven normally. All on-board equipment is normally installed in the first test vehicle 20, and it is ensured that the on-board equipment is in normal operating condition, and the vehicle mass is consistent with the vehicle curb mass. Vehicle parts that cannot be dropped are selected with counterweights of the same mass, and 90% of the tank volume of water should be injected into the fuel tank of the first test vehicle 20. The liquids in other vehicle systems (brake system, cooling system) should be completely drained, and the drained liquids should be compensated in the first test vehicle 20; for the first test vehicle 20, the steering wheel of the vehicle should be in the middle position, and at the end of the acceleration process, the steering wheel is in a free state and is in the manufacturer's specifications. The position of the vehicle when it is traveling in a straight line; the window glass should be in the closed position. For the convenience of measurement, the window glass can also be opened. For hand-cranked windows, the control handle must be in the position when the window is closed. The vehicle's gear lever should be in the neutral position; the pedals should be in the normal relaxed position; the doors should be closed but not locked; if the vehicle is equipped with a movable roof or a removable roof, it should be in the closed state. For the convenience of measurement, it can be opened; the sun visor should be in the retracted state; the rearview mirror should be in the normal use position; the front and rear armrests should be in the lowered state; the height-adjustable headrest should be in the highest position; the seats should be in the normal riding state.

[0035] Specifically, the vehicle lifting module 10 lifts the first test vehicle 20 to a preset drop height. The preset drop height can be determined based on the vehicle collision speed pre-set in the test experiment; it should be noted that since the acceleration of the vehicle falling from a high altitude is the gravity acceleration, the corresponding preset drop height is set according to the preset collision speed of the first test vehicle 20. For example, for a vehicle collision speed of 80 km / h, the preset drop height is 25.17 meters based on the calculation of the gravity acceleration.

[0036] Optionally, the vehicle lifting module 10 includes a vehicle lifting unit, a vehicle connection mechanism and a lifting controller; wherein,

[0037] The vehicle lifting unit is connected to the vehicle connection mechanism, and the vehicle connection mechanism is fixed in the vehicle lifting unit. The vehicle connection mechanism is used to fix the first test vehicle 20 in the air in a first vehicle posture. The first vehicle posture is that the front of the first test vehicle 20 is downward, the rear of the vehicle is upward, the rear of the vehicle is connected to the vehicle connection mechanism, and the front of the vehicle is vertically downward. The vehicle lifting unit is used to lift and lower the vehicle connection mechanism and the first test vehicle 20. The vehicle connection mechanism is communicatively connected to the lifting controller, and the lifting controller can obtain the height of the vehicle connection mechanism and the connection status of the vehicle connection mechanism and the first test vehicle 20. The lifting controller can also be communicatively connected to the vehicle lifting unit and can control the lifting and lowering of the vehicle lifting unit. The lifting controller can be communicatively connected to the data acquisition and analysis module 60, send signals to the data acquisition and analysis module 60, and receive signals sent by the data acquisition and analysis module 60. Among them, the connection status of the vehicle connection mechanism and the first test vehicle 20 is fixed and unconnected.

[0038] Optionally, the vehicle connection mechanism can be a connection plate connecting the vehicle lifting unit and the first test vehicle 20 respectively, which is connected to the first test vehicle 20 through four adjustable ropes on the connection plate, two of the four adjustable ropes are respectively connected to the front two wheels of the first test vehicle 20, and the other two ropes are connected to the beam between the front door and the rear door of the first test vehicle 20. The first test vehicle 20 is put into a balanced state by adjusting the length of the four ropes.

[0039] Optionally, the vehicle lifting unit may be a vertical lifting platform, or a crane or a hoist.

[0040] Optionally, when the first test vehicle 20 is fixed in the first vehicle posture by the vehicle connection mechanism, an angle measuring instrument may be used to measure the vertical angle of the first test vehicle 20 to ensure that the first test vehicle 20 is in the first vehicle posture.

[0041] Specifically, a trigger sensor is provided in the second test vehicle 30, and the trigger sensor is communicatively connected with the data acquisition and analysis module 60. The trigger sensor of the second test vehicle 20 can be set to a contact switch trigger, a TTL trigger, and a sensor signal trigger. The trigger sensor sends a signal to the data acquisition and analysis module 60 to trigger data acquisition of the experimental test object 50.

[0042] Optionally, when the second test vehicle 30 is provided with a trigger sensor, a rigid surface can be selected on the front of the second test vehicle, the trigger sensor can be installed, and a trigger mode of the trigger sensor can be set. Exemplarily, the trigger mode can be set to send a signal to the data acquisition and analysis module 60 when the first test vehicle 20 collides with the second test vehicle 30; the trigger mode can also be set to when the first test vehicle 20 collides with the second test vehicle 30, the acceleration of the first test vehicle 20 reaches 10g.

[0043] Specifically, the second test vehicle 30 is also provided with a laser transmitter, and the first test vehicle 20 is provided with a laser receiver and an acceleration sensor. It should be noted that the number of laser transmitters provided in the second test vehicle 30 is the same as that of laser receivers provided in the first test vehicle 20, and each laser transmitter has a corresponding laser receiver, and each laser receiver is communicatively connected to the data acquisition and analysis module 60. The acceleration sensor is communicatively connected to the data acquisition and analysis module 60, and the acceleration sensor is usually provided on the vehicle B-pillar and the load beam of the first test vehicle 20.

[0044] Optionally, by setting laser transmitters and laser receivers at corresponding positions of the second test vehicle 30 and the first test vehicle 20, the second test vehicle 30 and the first test vehicle 20 are aligned by the laser transmitter and the laser receiver so that the collision effect between the second test vehicle 30 and the first test vehicle 20 is best.

[0045] Optionally, when a laser transmitter is set on the second test vehicle 30, a laser receiver is set on the corresponding position of the first test vehicle 20, and the laser transmitter emits a laser beam, and the laser receiver detects the laser beam. If the laser beam is not detected within a certain time range, a vehicle alignment signal is sent to the data acquisition and analysis module 60; if the laser beam is detected within a certain time range, the laser receiver determines the angle of the laser beam, and calculates the position of the laser transmitter relative to the laser receiver through the angle of the laser beam. If the positions of the laser receiver and the laser transmitter are in a straight line, a vehicle alignment signal is sent to the data acquisition and analysis module 60; if the positions of the laser receiver and the laser transmitter are not in a straight line, a vehicle alignment signal is sent to the data acquisition and analysis module 60.

[0046] Optionally, when multiple laser transmitters are set on the second test vehicle 30, a corresponding number of laser receivers are set at corresponding positions on the first test vehicle 20, each laser transmitter emits a laser beam, each laser receiver detects the laser beam, each laser receiver receives the laser beam within a certain time range, and through the angle calculation of the laser beam, it is obtained that the laser transmitters are in a straight line relative to the laser receiver, and a vehicle alignment signal is sent to the data acquisition and analysis module 60; otherwise, a vehicle to be aligned signal is sent to the data acquisition and analysis module 60.

[0047] Optionally, when aligning the first test vehicle 20 and the second test vehicle 30, the first test vehicle 20 is preferentially raised to a preset drop height by the vehicle lifting module 10, and then the first test vehicle 20 and the second test vehicle 30 are aligned by adjusting the vehicle connection mechanism.

[0048] Specifically, the child safety seat high-altitude drop collision test system also includes a ground fixing module 70, which is used to fix the second test vehicle 30 to a second vehicle posture, where the second vehicle posture is that the front of the second test vehicle 30 is facing upward and the rear of the second test vehicle 30 is facing downward. Exemplarily, the ground fixing module 70 can be provided with a fixing device connected to the second test vehicle 30, and the fixing device can select a plurality of fixing chains.

[0049] Optionally, the ground fixed module 70 is further provided with at least one high-speed camera outside the vehicle, which is in communication connection with the data acquisition and analysis module 60, and is used to acquire collision images of the first test vehicle 20 and the second test vehicle 30, and upload the captured collision images of the first test vehicle 20 and the second test vehicle 30 to the data acquisition and analysis module 60. The high-speed camera outside the vehicle is generally arranged at a position far away from the second test vehicle 30 to prevent the collision of the first test vehicle 20 and the second test vehicle 30 from causing damage to the high-speed camera outside the vehicle, and when the high-speed camera outside the vehicle is shooting, the high-speed camera outside the vehicle can be arranged to track the first test vehicle 20, and record images of the entire process of the fall collision and the moment of the collision.

[0050] Specifically, at least one in-vehicle high-speed camera is set in the first test car 20, and the in-vehicle high-speed camera is set inside the first test car 20. When the experimental test object 50 is a Q3 dummy, a camera bracket is welded at the front of the interior of the first test car 20, and the angle and viewing angle of the in-vehicle high-speed camera are adjusted to align with the experimental test object 50; when the experimental test object 50 is a Q1.5 dummy, a camera bracket is welded at the rear of the interior of the first test car 20, and the angle and viewing angle of the in-vehicle high-speed camera are adjusted to align with the experimental test object 50. The installed in-vehicle high-speed camera should be impact-resistant, and the lens of the in-vehicle high-speed camera should also be impact-resistant, and the image quality clarity of the in-vehicle high-speed camera is adjusted, and a local area network is established for the in-vehicle high-speed camera, and unified control and data transmission are performed through the local area network.

[0051] Specifically, when testing the experimental test object 50, the data acquisition and analysis module 60 can be set on the ground, and the entire test system can be controlled and processed by the test staff. The data acquisition and analysis module 60 can be used to receive signals sent by sensors, send control signals to sensors, receive test data sent by sensors and cameras after collecting the experimental test object 50, and perform data processing and data analysis on the test data to obtain the test results of the safety seat 40 to be tested. Before the collision test, a signal is sent to the lifting controller, and the first test vehicle 20 is lifted to a preset drop height through the vehicle lifting unit and the vehicle connecting mechanism; by receiving the vehicle alignment signal sent by the laser receiver, a vehicle position adjustment instruction is generated and sent to the lifting controller. After receiving the vehicle position adjustment instruction, the lifting controller controls the vehicle connecting mechanism to adjust the position of the first test vehicle 20, so as to align the first test vehicle 20 with the second test vehicle 30; after the data acquisition and analysis module 60 receives the vehicle alignment signal sent by the laser receiver, the data acquisition and analysis module 60 generates an experiment request instruction, and the data acquisition and analysis module 60 respectively confirms the working status of the data sensor, the trigger sensor, the in-vehicle high-speed camera, the out-vehicle high-speed camera and the acceleration sensor, and when the working status of the data sensor, the trigger sensor, the in-vehicle high-speed camera, the out-vehicle high-speed camera and the acceleration sensor are all in Under normal working conditions, the test staff confirms the start of the experiment through the data acquisition and analysis module 60, generates an experiment start instruction, sends the experiment start instruction to the lifting controller, and controls the vehicle connection mechanism to release the first test vehicle 20 according to the experiment start instruction through the lifting controller, so that the first test vehicle 20 and the second test vehicle 30 fall from a high altitude and collide; the data acquisition and analysis module 60 receives the collision trigger signal sent by the trigger sensor, and generates a data acquisition signal and a video acquisition signal; the data acquisition and analysis module 60 sends the data acquisition signal to the data sensor, and collects collision test data according to the data acquisition signal through the data sensor; the data acquisition and analysis module 60 sends the data acquisition signal to the high-speed camera in the vehicle, and collects the collision image in the vehicle according to the video acquisition signal through the high-speed camera in the vehicle; the data acquisition and analysis module 60 determines the test result of the safety seat 40 to be tested according to the collision test data and the collision image in the vehicle.

[0052] Optionally, the data acquisition and analysis module 60 may also include a data acquisition unit 610 and a data analysis unit 620. The data acquisition unit 610 and the data analysis unit 620 are connected via communication. The data acquisition unit 610 may be disposed at the rear of the first test vehicle 20, and the data analysis unit 620 may be disposed on the ground.

[0053] The technical solution of the embodiment of the present invention realizes a complete simulation of the real car collision in a real traffic accident by directly installing the child safety seat to be tested in the test vehicle and selecting two test vehicles for real collision; in the simulation process, the test vehicle is selected to be lifted to mid-air through the vehicle lifting module to perform a high-altitude drop collision of a free fall body, which can effectively control the collision speed of the test vehicle, reduce the influence of experimental errors on the experimental results, and reduce the test cost; and a trigger sensor and a data sensor are set in the collision vehicle, and when the vehicle collides, data collection is triggered to reduce data interference in the data collection process and improve the accuracy of the experiment; and at the same time, an in-vehicle high-speed camera is installed in the experimental vehicle, and a collision marker is set in the test dummy, and the protection of the child safety seat against vehicle collision injuries during the vehicle collision is effectively observed through video acquisition and collision markers, and the safety of the child safety seat is further tested and evaluated. The technical problem that the safety protection performance of the child safety seat in a traffic accident cannot be tested in the prior art is solved, and the vehicle collision experiment at different speeds is realized, which can effectively detect the safety of the child safety seat.

[0054] Figure 3 A flowchart of a child safety seat high-altitude drop collision test method provided by an embodiment of the present invention. The embodiment of the present invention is applied to the process of performing a safety test on a child safety seat through a child safety seat high-altitude drop collision test system. The embodiment of the present invention is applied to a child safety seat high-altitude drop collision test system, such as Figure 3 As shown, the method includes:

[0055] S310: When a collision trigger signal is received, a data acquisition signal and a video acquisition signal are generated.

[0056] Specifically, the trigger sensor of the second test vehicle sends a collision trigger signal to the data acquisition and analysis module. The first test vehicle and the second test vehicle collide. The data acquisition and analysis module receives the collision trigger signal and generates a data acquisition signal and a video acquisition signal based on the received collision trigger signal.

[0057] Among them, the data acquisition signal is used by the data sensor to collect data; the video acquisition signal is used to trigger the in-vehicle camera to collect image data.

[0058] S320: Collect collision test data according to the data collection signal.

[0059] Specifically, the data acquisition and analysis module sends the data acquisition signal to the data sensor, and the data sensor receives the data acquisition signal and collects the collision test data according to the data acquisition signal.

[0060] Among them, the collision test data is the injury data suffered by the experimental test subject during the collision between the first test vehicle and the second test vehicle; the collision test data may include the acceleration of the first test vehicle, the seat belt load, the chest acceleration, the head acceleration, the upper neck load, the upper neck torque, the chest deformation and the abdominal pressure.

[0061] S330: Collect a collision image inside the vehicle according to the video acquisition signal.

[0062] Specifically, the data acquisition and analysis module sends the video acquisition signal to the in-vehicle high-speed camera, which receives the video acquisition signal and acquires the in-vehicle collision image according to the video acquisition signal. The in-vehicle collision image is an image of the experimental test object when the first test vehicle and the second test vehicle collide.

[0063] S340: Determine the test result of the safety seat to be tested according to the collision test data and the in-vehicle collision image.

[0064] Specifically, the data acquisition and analysis module receives collision test data and in-vehicle collision images, analyzes the test conditions of the test safety seat based on the collision test data and the in-vehicle collision images, determines the degree of protection of the test safety seat for the test object based on the collision test data, and determines the protection capability of the test safety seat for the test object based on the in-vehicle collision images.

[0065] Optionally, in another optional embodiment of the present invention, determining the test result of the safety seat to be tested according to the collision test data and the in-vehicle collision image includes:

[0066] Perform data filtering on the collision test data based on preset data standards to determine target safety data;

[0067] When the target safety data meets the preset safety threshold, if the in-vehicle collision image identifies that there is no collision marker in the first test vehicle, the test result of the safety seat to be tested is determined to have passed the safety test.

[0068] Among them, the preset data standard can be a data channel cutoff frequency of preset sensor data; the target safety data can be sensor data that meets the preset data standard; the preset safety threshold can be a preset safety standard value for the degree of injury to the child dummy. It should be noted that the preset data standard can be the measurement channel frequency level regulation of ISO 6487:2015, the preset safety threshold can be a safety indicator set with reference to the requirements of UN129, and the preset safety threshold can be based on data comparison between the target safety data and the preset safety threshold. If the target safety data is less than the preset safety threshold, it means that the safety seat to be tested meets the safety indicator; if the target safety data is greater than the preset safety threshold, it means that the safety seat to be tested does not meet the safety indicator.

[0069] Among them, the collision marker has a certain sticky identification function. It should be noted that the collision marker is identified through the collision image in the car. If it is judged that there is a collision marker in the first test vehicle, it means that the child dummy has collided with the first test vehicle, and there is a safety risk; if it is judged that there is no collision marker in the first test vehicle, it means that the child dummy has not collided with the first test vehicle, and there is no safety risk.

[0070] Specifically, the collision test data is filtered based on preset data standards to determine target safety data; when the target safety data meets the preset safety threshold, if the in-vehicle collision image recognizes that there is no collision marker in the first test vehicle, the test result of the safety seat to be tested is determined to have passed the safety test.

[0071] Exemplarily, the preset safety threshold is a safety indicator set with reference to the requirements of UN129, and the preset safety threshold includes: first test vehicle acceleration 60, seat belt load 60, chest acceleration 180, head acceleration 1000, upper neck load 1000, upper neck torque 600, chest deformation 600 and abdominal pressure 180.

[0072] Optionally, in another optional embodiment of the present invention, determining the test result of the safety seat to be tested according to the collision test data and the in-vehicle collision image includes:

[0073] After filtering the collision test data based on the preset data standard and determining the target safety data, it also includes:

[0074] When the target safety data meets the preset safety threshold, if the in-vehicle collision image recognizes that there is a collision marker in the first test vehicle, the test result of the safety seat to be tested is determined to be a risky safety seat.

[0075] Specifically, when the target safety data meets the preset safety threshold, if the in-vehicle collision image recognizes that there is a collision marker in the first test vehicle, the test result of the safety seat to be tested is determined to be a risky safety seat.

[0076] Optionally, in another optional embodiment of the present invention, after filtering the collision test data based on a preset data standard to determine the target safety data, the method further includes:

[0077] In the case where the target safety data does not meet the preset safety threshold, the test result of the safety seat to be tested is determined to have failed the safety test.

[0078] Specifically, when the target safety data does not meet the preset safety threshold, the test result of the safety seat to be tested is determined as failing the safety test.

[0079] Optionally, in another optional embodiment of the present invention, before generating a data acquisition signal when a collision test signal is received, the method further includes:

[0080] When a vehicle alignment signal is received, a vehicle position adjustment instruction is generated; the vehicle position adjustment instruction is sent to the lifting controller through the data acquisition and analysis module; and the position of the first test vehicle is adjusted through the lifting controller to align the first test vehicle with the second test vehicle.

[0081] Specifically, before the collision test, a signal is sent to the lifting controller, and the first test vehicle is lifted to a preset drop height through the vehicle lifting unit and the vehicle connecting mechanism; by receiving the vehicle alignment signal sent by the laser receiver, a vehicle position adjustment instruction is generated and sent to the lifting controller. After receiving the vehicle position adjustment instruction, the lifting controller controls the vehicle connecting mechanism to adjust the position of the first test vehicle, so as to align the first test vehicle with the second test vehicle.

[0082] Optionally, in another optional embodiment of the present invention, after the position of the first test vehicle is adjusted by the lifting controller so that the first test vehicle is aligned with the second test vehicle, the method further includes:

[0083] When a vehicle alignment signal is received, an experiment request instruction is generated; an experiment start instruction is determined according to the experiment request instruction; the experiment start instruction is sent to the lifting controller through the data acquisition and analysis module; and the lifting controller controls the vehicle connection mechanism according to the experiment start instruction to release the first test vehicle, so that the first test vehicle and the second test vehicle undergo a high-altitude drop collision.

[0084] Specifically, after the data acquisition and analysis module receives the vehicle alignment signal sent by the laser receiver, the data acquisition and analysis module generates an experiment request instruction, and the data acquisition and analysis module confirms the working status of the data sensor, the trigger sensor, the in-vehicle high-speed camera, the outside-vehicle high-speed camera and the acceleration sensor respectively. When the working status of the data sensor, the trigger sensor, the in-vehicle high-speed camera, the outside-vehicle high-speed camera and the acceleration sensor are all in normal working condition, the test staff confirms the start of the experiment through the data acquisition and analysis module, generates an experiment start instruction, and sends the experiment start instruction to the lifting controller. The lifting controller controls the vehicle connection mechanism according to the experiment start instruction to release the first test vehicle, so that the first test vehicle and the second test vehicle undergo a high-altitude drop collision.

[0085] The technical solution of the embodiment of the present invention realizes a complete simulation of the real car collision in a real traffic accident by directly installing the child safety seat to be tested in the test vehicle and selecting two test vehicles for real collision; in the simulation process, the test vehicle is selected to be lifted to mid-air through the vehicle lifting module to perform a high-altitude drop collision of a free fall body, which can effectively control the collision speed of the test vehicle, reduce the influence of experimental errors on the experimental results, and reduce the test cost; and a trigger sensor and a data sensor are set in the collision vehicle, and when the vehicle collides, data collection is triggered to reduce data interference in the data collection process and improve the accuracy of the experiment; and at the same time, an in-vehicle high-speed camera is installed in the experimental vehicle, and a collision marker is set in the test dummy, and the protection of the child safety seat against vehicle collision injuries during the vehicle collision is effectively observed through video acquisition and collision markers, and the safety of the child safety seat is further tested and evaluated. The technical problem that the safety protection performance of the child safety seat in a traffic accident cannot be tested in the prior art is solved, and the vehicle collision experiment at different speeds is realized, which can effectively detect the safety of the child safety seat.

[0086] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0087] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A child safety seat high-altitude drop collision test system, characterized in that: It includes a vehicle lifting module, a first test vehicle, a second test vehicle, a safety seat to be tested, a test object and a data acquisition and analysis module; wherein, The experimental test object is fixed in the safety seat to be tested, a data sensor and a collision marker are arranged in the experimental test object, and the data sensor is connected to the data acquisition and analysis module; The safety seat to be tested is installed in a preset seat position of the first test vehicle; The vehicle lifting module lifts the first test vehicle to a preset drop height; A trigger sensor is provided in the second test vehicle, and the trigger sensor is connected to the data acquisition and analysis module; At least one in-vehicle high-speed camera is arranged in the first test vehicle, and the in-vehicle high-speed camera is used to photograph the experimental test object, and the in-vehicle high-speed camera is connected to the data acquisition and analysis module; The data acquisition and analysis module receives the collision trigger signal sent by the trigger sensor and generates a data acquisition signal and a video acquisition signal; The data acquisition and analysis module sends the data acquisition signal to the data sensor, and collects collision test data according to the data acquisition signal through the data sensor; The data acquisition and analysis module sends the data acquisition signal to the in-vehicle high-speed camera, and the in-vehicle high-speed camera acquires the in-vehicle collision image according to the video acquisition signal; The data acquisition and analysis module determines the test result of the safety seat to be tested according to the collision test data and the in-vehicle collision image.

2. The system according to claim 1, characterized in that The vehicle lifting module includes a vehicle lifting unit, a vehicle connecting mechanism and a lifting controller; The vehicle connection mechanism is used to fix the first test vehicle in a first vehicle posture; The vehicle connection mechanism is fixed in the vehicle lifting unit, and the lifting controller is connected to the vehicle connection mechanism; The lifting controller is connected to the vehicle lifting unit, and the lifting controller is connected to the data acquisition and analysis module.

3. The system according to claim 2, characterized in that The second test vehicle is provided with a laser transmitter; the first test vehicle is provided with a laser receiver and an acceleration sensor; The laser receiver is connected to the data acquisition and analysis module; The acceleration sensor is connected to the data acquisition and analysis module.

4. The system according to claim 1, characterized in that It also includes a ground fixing module; the ground fixing module is used to fix the second test vehicle to a second vehicle posture; At least one external high-speed camera is arranged in the ground fixed module, and the external high-speed camera is used to photograph the first test vehicle and the second test vehicle, and the external high-speed camera is connected to the data acquisition and analysis module.

5. A method for testing a child safety seat from high altitude drop, characterized in that: A child safety seat high-altitude drop collision test system applied to any one of claims 1-4, comprising: When a collision trigger signal is received, a data acquisition signal and a video acquisition signal are generated; Collect collision test data according to the data acquisition signal; collecting a collision image inside the vehicle according to the video acquisition signal; The test result of the safety seat to be tested is determined according to the collision test data and the in-vehicle collision image.

6. The method according to claim 5, characterized in that The step of determining the test result of the safety seat to be tested according to the collision test data and the in-vehicle collision image comprises: Performing data filtering on the collision test data based on a preset data standard to determine target safety data; In the case where the target safety data meets a preset safety threshold, if the in-vehicle collision image identifies that no collision marker exists in the first test vehicle, the test result of the safety seat to be tested is determined to have passed the safety test.

7. The method according to claim 6, characterized in that After filtering the collision test data based on the preset data standard to determine the target safety data, the method further includes: In the case where the target safety data meets a preset safety threshold, if the in-vehicle collision image identifies a collision marker in the first test vehicle, the test result of the safety seat to be tested is determined as a risky safety seat.

8. The method according to claim 6, characterized in that After filtering the collision test data based on the preset data standard to determine the target safety data, the method further includes: In the case where the target safety data does not meet the preset safety threshold, the test result of the safety seat to be tested is determined as failing the safety test.

9. The method according to claim 5, characterized in that In the case of receiving a collision test signal, before generating a data acquisition signal, the method further includes: generating a vehicle position adjustment instruction when receiving a vehicle to be aligned signal; Sending the vehicle position adjustment instruction to the lifting controller through the data acquisition and analysis module; The position of the first test vehicle is adjusted by the lifting controller so that the first test vehicle is aligned with the second test vehicle.

10. The method according to claim 9, characterized in that After adjusting the position of the first test vehicle by the lifting controller so that the first test vehicle is aligned with the second test vehicle, the method further includes: generating an experiment request instruction when a vehicle alignment signal is received; Determine an experiment start instruction according to the experiment request instruction; Sending the experiment start instruction to the lifting controller through the data acquisition and analysis module; The lifting controller controls the vehicle connection mechanism to release the first test vehicle according to the experiment start instruction, so that the first test vehicle and the second test vehicle perform a high-altitude drop collision.

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