Vehicle safety belt test system and test method

Abstract

The invention relates to the technical field of vehicle safety belt testing, in particular to a vehicle safety belt testing system and method. The test system comprises a bearing module which is fixedly arranged and used for bearing a dummy and a safety belt; the traction module is used for dragging the dummy to simulate inertia force of the dummy in the braking process; and the data acquisition module is used for acquiring test data in the test process. According to the test method, the test system is used, the inertia force of the dummy in the braking process is simulated through the traction force generated by the traction module on the dummy, a moving mechanism and a large test site are not needed, operation and use are convenient, the test efficiency and test repeatability are high, the test cost is low, and the test system has great popularization value.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle safety belt testing, and in particular to a vehicle safety belt testing system and a testing method. Background Art

[0002] At present, the measurement methods of vehicle seat belts mainly include static test and dynamic test. The static test mainly uses static seats and dummies to measure the retraction force and retraction speed of the seat belt; the dynamic test mainly uses a pulley to simulate the braking process, or directly conducts a real vehicle braking test to measure the retraction force, retraction speed and occupant out-of-position control effect of the seat belt.

[0003] The "Technical Requirements and Test Methods for Active Pre-tensioned Seat Belts in Automobiles" uses static testing to detect the retraction force and retraction speed of the seat belts, but cannot measure the results of the seat belt's improvement in the dummy's disengagement during actual braking.

[0004] Patent publication number "CN116296449A" discloses a system and method for testing the dynamic safety performance of active intelligent seat belts for automobiles. The test system includes a load-bearing module, an active intelligent seat belt, a test scenario simulation unit, and a data acquisition unit. The test scenario simulation unit of the test system includes a deceleration trolley, which simulates the braking and impact tests of the vehicle by moving the deceleration trolley. According to the description of active and passive deceleration in the 2024 version of CNCAP (China New Car Assessment Procedure), the vehicle braking time must be at least 500ms to reach the peak deceleration and stabilize. The braking time may be longer during actual vehicle use, so the deceleration trolley needs a very long moving stroke to meet the test requirements, and occupies a large area. Summary of the invention

[0005] The main purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and provide a vehicle safety belt testing system and a testing method.

[0006] The technical solution adopted by the present invention is: a vehicle safety belt testing system, comprising:

[0007] A carrying module, the carrying module is fixedly arranged and used to carry a dummy and a safety belt;

[0008] A traction module, the traction module is used to pull the dummy to simulate the inertia force of the dummy during braking;

[0009] A data acquisition module is used to collect test data during the test process.

[0010] Furthermore, it also includes a judgment module, which is used to judge whether the debugging of the test system is qualified.

[0011] Furthermore, the judgment module judges whether the debugging is qualified according to whether the displacement time curve s is within the error range set by the calibration displacement time curve S; the displacement time curve s is acquired by the data acquisition module during the simulation braking process of the dummy being pulled by the same inertia force, and the relationship between the displacement and time of the dummy is acquired; the calibration displacement time curve S is acquired during the actual vehicle braking process or in the vehicle test virtual simulation system, and the relationship between the displacement and time of the same test part is acquired.

[0012] Furthermore, the error range is 10% of the calibration displacement time curve S.

[0013] Furthermore, the traction module simultaneously pulls multiple test parts of the dummy; and the traction force of the traction module on the test parts conforms to the inertia force of the test parts under the actual vehicle braking test state.

[0014] Furthermore, the test parts include the dummy's head, chest and abdomen, and the traction forces exerted by the traction module on the dummy's head, chest and abdomen respectively conform to the inertia forces of the test parts under the actual vehicle braking test state.

[0015] Furthermore, the traction module includes a traction drive device, a traction rope and a belt, the belt is used to be fixed on the test part of the dummy, and the two ends of the traction rope are respectively connected to the belt and the traction drive device.

[0016] Furthermore, the traction module also includes a tension sensor for detecting the magnitude of the traction force applied to the dummy.

[0017] Furthermore, the traction module pulls both sides of the chest and / or abdomen through two traction ropes.

[0018] Furthermore, the traction drive device pulls two sides of the chest belt and / or the abdomen belt through two traction ropes.

[0019] Furthermore, the load-bearing module includes a fixed seat and a seat belt fixing assembly for fixing a seat belt.

[0020] Furthermore, the data acquisition module includes a time collector and a displacement collector.

[0021] Furthermore, the displacement collector includes a displacement monitoring camera or a wire sensor.

[0022] Furthermore, the traction drive device includes a drive motor.

[0023] Another aspect of the present invention provides a vehicle safety belt testing method, using the vehicle safety belt testing system provided by the present invention, the testing method comprises:

[0024] Fix the dummy and seat belt on the load-bearing module according to industry regulations;

[0025] The traction dummy simulates the inertial force of the dummy during braking;

[0026] Collect test data during the dummy being towed and simulated braking.

[0027] According to a vehicle safety belt testing method provided by the present invention, the test data includes a displacement time curve s of a dummy on a bearing module during a simulated braking process pulled by an equal inertial force;

[0028] The traction dummy simulates the inertia force of the dummy during braking, including adjusting the traction force of the dummy to perform a simulated braking test when the displacement time curve s is not within the error range of the calibration displacement time curve S, until the displacement time curve s is within the error range of the calibration displacement time curve S; the calibration displacement time curve S is obtained by collecting the displacement of the same test part during the braking process of the actual vehicle or the displacement of the same test part in the vehicle test virtual simulation system.

[0029] According to a vehicle seat belt testing method provided by the present invention, the test data includes seat belt data of the tested seat belt and the dummy fixed on the bearing module according to industry regulations when the displacement time curve s is within the error range of the calibration displacement time curve S.

[0030] According to a vehicle seat belt testing method provided by the present invention, the seat belt data includes at least one of pre-tensioning response time, pre-tensioning speed, pre-tensioning force or durability.

[0031] According to a vehicle seat belt testing method provided by the present invention, the adjusting of the traction force of a dummy to perform a simulated braking test includes adjusting a voltage duty cycle of a drive motor used to pull the dummy to adjust an output torque of the drive motor.

[0032] The beneficial effects of the present invention include: 1. The present invention carries the dummy and the safety belt through a fixed carrying module, pulls the dummy through a traction module, uses traction force to simulate the inertia force of the dummy during braking, and generates traction force just like vehicle braking. The dummy is displaced when the traction force simulating the inertia force is generated, and various test data in the test process are collected through a data acquisition module to detect various performances of the safety belt; the present invention simulates the inertia force of the dummy braking through the traction force of the traction module, does not need a mobile mechanism for carrying the dummy and a large test site, saves test space, and is easy to operate and use;

[0033] 2. The judgment module can be used to judge whether the debugging of this test system meets the requirements. It can be used to debug this test system and also to test seat belts;

[0034] 3. The judgment method of the judgment module is very simple. If the collected displacement time curve s is within the error range of the calibration displacement time curve S, the debugging is qualified and the seat belt test can be carried out;

[0035] 4. The traction module has multiple test parts for traction dummy, which can detect the improvement effect of the seat belt locally. The qualified debugging of multiple test parts can provide more accurate feedback on the higher accuracy of this test system.

[0036] 5. The test parts include the head, chest and abdomen, which have large inertia forces and are common injured parts in accidents. Using these three parts as test parts is conducive to protecting the driver's life safety;

[0037] 6. By using two traction ropes to pull the chest and / or abdomen on both sides, the deviation of the traction force of the traction module on the dummy in the simulated inertial force direction can be reduced. Since the chest and abdomen are wide, bilateral traction can improve the accuracy of the traction force direction and reduce the deviation;

[0038] 7. The vehicle safety belt testing method provided by the present invention fully utilizes the advantages of the vehicle safety belt testing system of the present invention, does not require a large test site, and the testing method is simple;

[0039] 8. The test method provided by the present invention can be used to debug the test system of the present invention. The displacement time curve s collected by the braking test with the same inertia force as the traction force is judged whether the debugging is qualified or not by whether it is within the error range of the calibration displacement time curve S;

[0040] 9. The test method provided by the present invention, when the test system is debugged and qualified, fixes the tested seat belt and dummy on the bearing module according to the industry regulations for testing, collects seat belt data, and avoids the test data not meeting the standards;

[0041] 10. The method of adjusting the traction force of the present invention is very simple. A driving motor is used as a traction driving device. The output torque of the driving motor can be adjusted by adjusting the voltage duty cycle of the driving motor to change the traction force.

[0042] The vehicle seat belt test system of the present invention can be used to simulate dynamic testing of seat belt data. The traction force generated by the traction module on the dummy simulates the inertia force of the dummy during braking. It does not require a mobile mechanism and a large test site. It is easy to operate and use, has high test efficiency and test repeatability, and has low test cost, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 : A structural schematic diagram of a vehicle safety belt test system of the present invention;

[0044] Figure 2 : A schematic diagram of the structure of the traction module connected to the dummy of the present invention;

[0045] Figure 3 : Schematic diagram of voltage duty cycle;

[0046] Figure 4 : Head center of mass trajectory authentication channel map;

[0047] Figure 5 : A schematic front view of an embodiment of the test system;

[0048] Among them: 1—carrying module; 10—bottom plate; 11—fixed seat; 12—seat belt fixing assembly; 13—fixed bracket; 2—traction module; 21—traction drive device, 211—first drive motor; 212—second drive motor; 213—third drive motor; 22—traction rope; 23—belt; 231—head strap; 232—chest strap; 233—abdomen strap; 24—cross bar; 3—dummy; 31—head; 32—chest; 33—abdomen; 4—displacement monitoring camera. DETAILED DESCRIPTION

[0049] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] The present invention relates to a vehicle safety belt test system, which is used for testing the safety belt and can simulate dynamic testing. A dummy 3 and a safety belt are carried by a fixedly arranged bearing module 1, and a traction module 2 is used to pull the dummy 3, and a traction force is used to simulate the inertia force of the dummy 3 during braking. When the traction force is generated, it is like vehicle braking, and the dummy 3 is displaced when the traction force simulating the inertia force is generated. Various test data in the test process are collected by a data acquisition module to detect various performances of the safety belt; the present invention simulates the inertia force of the dummy 3 during braking by the traction force of the traction module 2, and does not need a mobile mechanism for carrying the dummy 3 and a large test site, thus saving test space, being easy to operate and use, having high test efficiency and test repeatability, and low test cost, and having great promotion value.

[0054] A vehicle seat belt testing system, such as Figures 1 to 5 As shown, it includes a bearing module 1, a traction module 2 and a data acquisition module. The bearing module 1 is fixedly arranged at the test site and is used to bear the dummy 3 and the safety belt; the traction module 2 is used to pull the dummy 3 to simulate the inertia force of the dummy 3 during the braking process; and the data acquisition module is used to collect test data during the test process. The traction force of the traction module 2 on the dummy 3 is the inertia force of the dummy 3 during the braking process of the actual vehicle. Before the safety belt is reeled, the dummy 3 is displaced under the action of the traction force. By collecting various test data through the data acquisition module, the safety belt can be dynamically tested to measure the improvement of the dummy 3's dislocation caused by the safety belt during the actual braking process. At the same time, there is no moving mechanism for bearing the dummy 3 and the safety belt, so a large test site is not required, saving experimental space.

[0055] In a certain embodiment, the test system of the present invention further includes a judgment module, which is used to judge whether the debugging of the test system is qualified, that is, to judge whether the traction force of the traction module on the dummy is qualified when debugging the test system. When the test system has the judgment module, both debugging and testing operations can be performed. After the debugging is qualified, the test system can directly perform the seat belt test without the judgment module.

[0056] On the basis that the test system also includes a judgment module, the judgment module judges whether the test system is qualified according to whether the displacement time curve s is within the error range set by the calibration displacement time curve S; the displacement time curve s is used to judge whether the test system is qualified within the error range set by the calibration displacement time curve S; otherwise, it is judged that the test system needs to be debugged; the displacement time curve s is collected by the data acquisition module when the dummy 3 is pulled with the same inertia force to simulate the braking process and the displacement and time relationship of the dummy 3; the calibration displacement time curve S is collected by the actual vehicle braking process or the vehicle test virtual simulation system The displacement and time relationship of the same test part is collected; the same inertia force refers to the traction force being approximately the same as the inertia force of the dummy 3 in the actual vehicle braking test or the vehicle test virtual simulation system in which the calibration displacement time curve S is obtained; for example, the calibration displacement time curve S obtained by the actual vehicle braking test with acceleration a, the inertia force of the dummy 3 is am, m is the mass of the test part of the dummy 3, and the traction force f of the traction module 2 on the dummy 3 is the same as the inertia force, that is, the traction force f=am, and its acceleration a can change with the test time. Preferably, the error range of the calibration displacement time curve S is set to 10%. The judgment module can be used to judge whether the debugging of the test system meets the requirements. The judgment method is simple. If the collected displacement time curve s is within the error range of the calibration displacement time curve S, the debugging is qualified.

[0057] In certain embodiments, such as Figures 1-2 As shown, the traction module 2 pulls multiple test parts of the dummy 3 at the same time; the traction force of the traction module 2 on the test part conforms to the inertia force of the test part under the actual vehicle braking test state; for example, the traction force f of the traction module 2 = a0m, where m is the mass of the test part of the dummy 3, and a0 is the acceleration of the actual vehicle braking or the braking acceleration in the vehicle test virtual simulation system, which can change with the test time, and the traction force f also changes when it changes. The traction module 2 pulls multiple test parts, and the displacement of multiple test parts in the simulated braking process can be collected, and the improvement effect of the seat belt on the driver's local area can be detected separately; the qualified debugging of multiple test parts can more accurately feedback the higher accuracy of this test system.

[0058] Based on the traction module 2 simultaneously tractioning multiple test parts of the dummy 3, in a certain embodiment, the test parts include the head 31, chest 32 and abdomen 33 of the dummy 3, and the traction forces of the traction module 2 on the head 31, chest 32 and abdomen 33 of the dummy 3 respectively conform to the inertia force of each test part under the actual vehicle braking test state, such as the traction forces on the head 31, chest 32 and abdomen 33 of the dummy 3 are f1=m1a0, f2=m2a0, f3=m3a0, respectively, m1 is the mass of the head 31, m2 is the mass of the chest 32, m3 is the mass of the abdomen 33, and a0 is the acceleration of the actual vehicle braking. During braking, the driver's head 31, chest 32 and abdomen 33 have frictional force between the pelvis and the seat, which offsets the inertial force of the pelvis, resulting in a displacement of the pelvis relative to the seat that is usually only a few mm, which can be ignored. The abdomen 33 is connected to the pelvis through the lumbar vertebrae, the chest 32 is connected to the abdomen 33 through the thoracic vertebrae, and the head 31 is connected to the chest 32 through the cervical vertebrae. Under the action of inertial force, the three hinges of the dummy's cervical vertebrae, thoracic vertebrae and lumbar vertebrae will rotate at different angles, resulting in displacements of different sizes when the above three parts lean forward. Using these three items as test parts can very accurately reproduce the occupant leaving their position during braking.

[0059] In one embodiment, if Figure 1 As shown, the traction module 2 includes a traction drive device 21, a traction rope 22 and a belt 23. The belt 23 is used to be fixed to the test part of the dummy 3. The belt 23 is selected according to the test part, and is fixed to the dummy 3 around the test part. The two ends of the traction rope 22 are respectively connected to the belt 23 and the traction drive device 21 to pull the test part of the dummy 3. Preferably, a drive motor is used as the traction drive device 21, which is convenient for adjusting the magnitude of the output torque, thereby adjusting the magnitude of the traction force. The traction module 2 has a simple structure, and the traction power is provided by the traction drive device 21. It can be fixed to the test part of the dummy 3 through the belt 23. The traction rope 22 can be connected to the belt 23 to transmit the traction force, thereby realizing the inertia force of the traction dummy 3 to simulate the braking process.

[0060] In some embodiments, the traction module 2 also includes a tension sensor for detecting the magnitude of the traction force applied to the dummy 3, so as to facilitate the regulation of the traction force so that the measured displacement time curve s conforms to the error range of the calibrated displacement time curve S; the tension sensor can be arranged between the traction rope 22 and the belt 23 to detect the magnitude of the tension.

[0061] Based on the fact that the traction module 2 includes a traction drive device 21, a traction rope 22 and a belt 23, as shown in FIG. Figures 1-2 As shown, multiple traction drive devices 21 are provided corresponding to multiple test locations, that is, each traction drive device 21 corresponds to a test location one by one, so that the traction force of each test location can be adjusted individually so that the displacement time curve s of each test location meets the error range of the calibration displacement time curve S.

[0062] Based on the fact that the traction module 2 includes a traction drive device 21, a traction rope 22 and a belt 23, as shown in FIG. Figure 2 As shown, three straps 23 are respectively fixed to the head 31, chest 32 and abdomen 33 of the dummy 3, and the traction drive device 21 is located on the same side of the test site. A traction rope 22 pulls the head strap 231 in front of the head 31, and two traction ropes 22 are used to pull the two sides of the chest strap 232 and / or the abdomen strap 233. Since the chest 32 and the abdomen 33 are relatively wide, using a single traction rope 22 to pull is likely to cause the traction force to deviate greatly in the direction of the inertial force. Using two traction ropes 22 to pull the two sides of the chest strap 232 and / or the abdomen strap 233 in the same direction can avoid the wearing area of ​​the safety belt and avoid affecting the test results of the safety belt. At the same time, it can also improve the accuracy of the traction force direction and reduce the deviation. When in use, the ends of the two traction ropes 22 away from the test site are vertically fixed to the same crossbar 24, and the traction drive device 21 pulls the crossbar 24 at the midpoint of the connection between the two traction ropes 22.

[0063] In a certain embodiment, the carrier module 1 is specifically described, such as Figure 1 As shown, the bearing module 1 includes a fixed seat 11 and a seat belt fixing assembly 12. The fixed seat 11 is fixed at the test site, and the seat belt fixing assembly 12 is used to install the fixed seat belt. In a specific solution, the bearing module 1 also includes a fixed bracket 13. The fixed bracket 13 and the fixed seat 11 are both fixed on the base 10. The fixed bracket 13 is located on one side of the fixed seat 11, and the seat belt fixing assembly 12 is fixed on the fixed bracket 13. When using the test, the dummy 3 is adjusted according to the industry regulations (technical requirements and test methods for active pre-tensioning seat belts of automobiles) and the posture of the fixed seat 11 and the posture of the dummy 3 are recorded. After the seat belt is installed, the traction module 2 is used to traction the test part of the dummy 3 for testing.

[0064] In a certain embodiment, the data acquisition module is specifically described, such as Figure 5 As shown, the data acquisition module includes a time collector and a displacement collector. The time collector is used to record the time data of the test process; the displacement collector is used to collect and record the displacement data of the test part of the dummy 3 and form a displacement time curve. The data acquisition module is used to collect and record various test data in the entire test process. The collectors for collecting specific data can be increased or decreased according to actual needs. For example, an acceleration collector is added to be installed on the actual vehicle for braking detection. The acceleration time curve of the braking process. During the debugging of the test system, the product of the acceleration time curve and the mass of the test part is the traction time curve. The continuous traction of the traction module 2 on the dummy 3 can be adjusted according to the traction time curve. The displacement collector includes but is not limited to the displacement monitoring camera 4 or the wire sensor, and other devices that can collect the displacement of the dummy 3 can also be used.

[0065] Another aspect of the present invention further provides a vehicle safety belt testing method, using the vehicle safety belt testing system provided by the present invention, the above-mentioned testing method comprises:

[0066] A1. Fix the dummy 3 and the safety belt on the load-bearing module 1 according to industry regulations;

[0067] B1, traction dummy 3 simulates the inertia force of dummy 3 during braking;

[0068] C1. Collect test data of dummy 3 during the simulated braking process.

[0069] According to a vehicle seat belt testing method provided by the present invention, in the above step C1, the test data includes a displacement time curve s of the dummy 3 on the carrier module 1 during a simulated braking process pulled by an equal inertial force; the equal inertial force means that the traction force is equal to or substantially the same as the inertial force of the dummy 3 in the actual vehicle braking test or vehicle test virtual simulation system for obtaining the calibration displacement time curve S;

[0070] In the above step B1, the traction dummy 3 simulates the inertia force of the dummy 3 during the braking process, including judging whether the displacement time curve s is within the error range of the calibration displacement time curve S; when the above displacement time curve s is not within the error range of the calibration displacement time curve S, adjust the traction force of the dummy 3 to perform a simulated braking test until the above displacement time curve s is within the error range of the calibration displacement time curve S; the above calibration displacement time curve S is obtained by the displacement collection of the same test part during the braking process of the actual vehicle or the displacement collection of the same test part in the vehicle test virtual simulation system. By judging whether the displacement time curve s is within the error range of the calibration displacement time curve S, it can be judged whether the test system needs to be debugged to be qualified. If it exceeds the error range, it needs to be debugged to be within the error range before testing the seat belt.

[0071] The method for judging whether the displacement time curve s is within the error range of the calibration displacement time curve S can be based on the virtual evaluation procedures for active and passive out-of-position occupant protection in Appendix I of CNCAP 2024, which provides a certification channel for the trajectory of the center of mass of the occupant's head 31, such as Figure 4 As shown, the head 31 displacement time curves that meet the area between the head 31 displacement time upper limit curve and the head 31 displacement time lower limit curve are all valid. If the center line of the trajectory area is taken as the calibration displacement time curve S, the upper and lower error boundaries are about 10% to 15%. The preferred error boundary is 10% as the judgment range, which can improve the accuracy of the test data of this test system.

[0072] According to a vehicle seat belt testing method provided by the present invention, in the above-mentioned step C1, the test data also includes seat belt data of the tested seat belt and the dummy 3 being fixed on the carrier module 1 according to industry regulations when the above-mentioned displacement time curve s is within the error range of the calibration displacement time curve S. The seat belt data can be tested according to steps A1, B1, and C1. This process can be performed according to industry regulations, and the traction force on the test part of the dummy 3 does not need to be of the same inertia force size.

[0073] According to a vehicle seat belt testing method provided by the present invention, the seat belt data includes at least one of pre-tensioning response time, pre-tensioning speed, pre-tensioning force or durability; the collection module is provided with a corresponding collector corresponding to each seat belt data.

[0074] After qualified debugging, the test system fixes the tested seat belt and dummy 3 on the carrier module 1 according to industry regulations to test the seat belt data. In actual use, the dummy 3 can be fixed on the fixed seat 11 according to industry regulations, and the first drive motor 211, the second drive motor 212 and the third drive motor 213 are used to connect the head 31, the chest 32 and the abdomen 33 of the dummy 3 through the traction rope 22, the cross bar 24 and the belt 23 respectively, and the postures of the dummy 3 and the fixed seat 11 are recorded. The first drive motor 211, the second drive motor 212 and the third drive motor 213 are started, and the displacement time curves and preload (which can be measured using a force sensor) of the head 31, chest 32 and abdomen 33 of the dummy 3 are recorded, and the tested seat belt data are comprehensively judged.

[0075] According to a vehicle seat belt testing method provided by the present invention, the above adjustment of the traction force on the dummy 3 to perform a simulated braking test includes adjusting the voltage duty cycle of the drive motor used to pull the dummy 3 to adjust the output torque of the drive motor, thereby adjusting the traction force on the dummy 3. Figure 3 As shown, when voltages with equal voltage values ​​are applied, different voltage duty ratios can output different effective voltages, thereby obtaining different motor speeds and output torques, thereby adjusting the traction force of the drive motor on the test part of the dummy 3. For example, when a voltage of 5V is applied to the drive motor and the voltage duty ratio is 75%, the effective voltage is 5V*75%=3.75V.

[0076] In actual use, a displacement monitoring camera 4 with a time acquisition function is installed on the side and top of the fixed seat 11; a strap 23 is fixedly installed on the head 31, chest 32 and abdomen 33 of the dummy 3, and the head strap 231, chest strap 232 and abdomen strap 233 are connected by the first drive motor 211, the second drive motor 212 and the third drive motor 213 through the traction rope 22, respectively. The posture of the fixed seat 11 and the posture of the dummy 3 are adjusted and recorded according to industry regulations, and the inspection and calibration seat belt is installed and wrapped around the dummy 3; the test system is debugged, and the first drive motor 211, the second drive motor 212 and the third drive motor 213 are started simultaneously with the same inertia force, so that the traction force on the head 31, chest 32 and abdomen 33 of the dummy 3 meets f1=m 1a0, f2=m2a0, f3=m3a0, record the displacement time curves s1, s2 and s3 of the head 31, chest 32 and abdomen 33 respectively, and judge whether the displacement time curves s1, s2 and s3 are respectively within the set error range of the calibration displacement time curves S1, S2 and S3 of the head 31, chest 32 and abdomen 33 of the dummy 3 through the judgment module. If they are all within the error range, it means that the test system is qualified, and the tested seat belt can be installed for testing. The traction of the drive motor corresponding to the displacement time curve that is not within the error range is adjusted, and its voltage duty cycle is increased or decreased until the measured displacement time curve is within the error range of the calibration displacement time curve; then replace and install the tested seat belt on the fixed bracket 13 to dynamically test various data of the seat belt.

[0077] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vehicle seat belt testing system, Features: include, A carrying module (1), the carrying module (1) being fixedly arranged and used for carrying a dummy (3) and a safety belt; A traction module (2), the traction module (2) being used to pull a dummy (3) to simulate the inertia force of the dummy (3) during braking; A data acquisition module is used to collect test data during the test process.

2. A vehicle safety belt testing system as claimed in claim 1, Features: It also includes a judging module, which is used to judge whether the debugging of the test system is qualified.

3. A vehicle safety belt testing system as claimed in claim 2, Features: The judgment module judges whether the debugging is qualified according to whether the displacement time curve s is within the error range set by the calibration displacement time curve S; the displacement time curve s is acquired by the data acquisition module during the simulation braking process of the dummy (3) being pulled by the same inertia force; the calibration displacement time curve S is acquired during the braking process of the actual vehicle or in the vehicle test virtual simulation system.

4. A vehicle safety belt testing system according to any one of claims 1 to 3, Features: The traction module (2) simultaneously pulls multiple test parts of the dummy (3); the traction force of the traction module (2) on the test parts conforms to the inertia force of the test parts under the actual vehicle braking test state.

5. A vehicle safety belt testing system as claimed in claim 4, Features: The test parts include the head (31), chest (32) and abdomen (33) of the dummy (3), and the traction forces exerted by the traction module (2) on the head (31), chest (32) and abdomen (33) of the dummy (3) respectively conform to the inertia forces of the test parts under the actual vehicle braking test state.

6. A vehicle safety belt testing system as claimed in claim 5, Features: The traction module (2) pulls both sides of the chest (32) and / or abdomen (33) via two traction ropes (22).

7. A vehicle seat belt testing method, Features: Using the vehicle safety belt testing system as claimed in any one of claims 1 to 6, the testing method comprises: Fix the dummy (3) and the safety belt on the load-bearing module (1) according to industry regulations; The traction dummy (3) simulates the inertial force of the dummy (3) during the braking process; The test data of the dummy (3) during the towed simulated braking process is collected.

8. A vehicle safety belt testing method as claimed in claim 7, Features: The test data includes a displacement time curve s of the dummy (3) on the bearing module (1) during a simulated braking process when the dummy (3) is pulled with an equal inertial force; The traction dummy (3) simulates the inertia force of the dummy (3) during the braking process, including adjusting the traction force of the dummy (3) to perform a simulated braking test when the displacement time curve s is not within the error range of the calibration displacement time curve S, until the displacement time curve s is within the error range of the calibration displacement time curve S; the calibration displacement time curve S is obtained by collecting the displacement of the same test part during the braking process of the actual vehicle or collecting the displacement of the same test part in a vehicle test virtual simulation system.

9. A vehicle safety belt testing method as claimed in claim 8, Features: The test data includes seat belt data obtained by fixing the tested seat belt and the dummy (3) on the carrier module (1) according to industry regulations when the displacement time curve s is within the error range of the calibration displacement time curve S.

10. A vehicle safety belt testing system as claimed in claim 8, Features: The adjustment performs a simulated braking test on the traction force of the dummy (3), including adjusting the voltage duty cycle of the drive motor used for traction of the dummy (3) to adjust the output torque of the drive motor.

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