Vehicle safety belt testing system and testing method

Abstract

The present invention relates to the technical field of vehicle seat belt testing, and specifically to a vehicle seat belt testing system and testing method. The testing system includes a carrying module, which is fixedly arranged and used to carry a dummy and a seat belt; a traction module, which is used to pull the dummy to simulate the inertial force of the dummy during braking; and a data acquisition module, which is used to collect test data during the test. The testing method uses the testing system of the present invention to simulate the inertial force of the dummy during braking by the traction force generated by the traction module on the dummy. It does not require a mobile mechanism or a large test site, is easy to operate and use, has high test efficiency and test repeatability, and has low test costs, and has great promotion value.

Description

Technical Field

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

[0002] Current vehicle seatbelt testing methods primarily fall into two categories: static and dynamic. Static testing employs a static seat and dummy to measure the belt's retraction force and speed. Dynamic testing employs a pulley to simulate braking, or directly conducts actual vehicle braking tests, to measure the belt's retraction force, speed, and occupant release control effectiveness.

[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 belt, but cannot measure the effect of the seat belt on improving 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 vehicle's braking and impact tests by moving the deceleration trolley. According to the active and passive deceleration instructions of the 2024 version of CNCAP (China New Car Assessment Program), the vehicle's braking time must be at least 500ms to reach the peak deceleration and stabilize. The braking time may be longer during actual vehicle use. Therefore, the deceleration trolley requires a very long moving stroke to meet the test requirements, and it 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 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] The 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 determines whether the debugging is qualified based on 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 collected by the data acquisition module during the simulation braking process of the dummy being pulled with the same inertia force, and the displacement and time relationship of the same test part is collected in the actual vehicle braking process or the vehicle test virtual simulation system.

[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; 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 to 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 both sides of the chest belt and / or the abdomen belt through two traction ropes.

[0019] Furthermore, the carrying 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 includes:

[0024] Fix the dummy and safety 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 when the dummy is towed and simulates 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 load-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 on the dummy to perform a simulated braking test when the displacement time curve s is not within the error range of the calibrated displacement time curve S until the displacement time curve s is within the error range of the calibrated displacement time curve S; the calibrated displacement time curve S is obtained by collecting the displacement of the same test part during the actual vehicle braking process or the displacement of the same test part in a 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 carrier 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 the dummy to perform a simulated braking test includes adjusting the voltage duty cycle of the drive motor used to pull the dummy to adjust the output torque of the drive motor.

[0032] The beneficial effects of the present invention include: 1. The present invention uses a fixed carrying module to carry a dummy and a seat belt, uses a traction module to pull the dummy, and uses traction to simulate the inertial force of the dummy during braking. When the traction force is generated, it is like a vehicle braking. The dummy is displaced when the traction force simulating the inertial force is generated. The data acquisition module collects various test data during the test to detect various performances of the seat belt. The present invention uses the traction force of the traction module to simulate the inertial force of the dummy's braking, eliminates the need for 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 determine 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 can test multiple test locations on the traction dummy to detect the improvement effect of the seat belt in each location. Qualified commissioning of multiple test locations can provide more accurate feedback on the high accuracy of the test system.

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

[0037] 6. Using two traction ropes to pull the chest and / or abdomen from both sides can reduce the deviation of the traction force exerted by the traction module on the dummy in the direction of the simulated inertial force. Since the chest and abdomen are relatively wide, bilateral traction can improve the accuracy of the traction force direction and reduce 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 determined to be within the error range of the calibration displacement time curve S to determine whether the debugging is qualified;

[0040] 9. The test method provided by the present invention is to fix the tested safety belt and dummy on the carrier module according to the industry regulations and conduct the test, so as to collect the safety belt data and avoid the test data being out of compliance with the regulations.

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

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

[0043] Figure 1 : A schematic structural 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 having 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, but are not to be construed as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships 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, rather than indicating or implying 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 limiting the present invention.

[0051] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise 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 seat belt testing system, which is used for testing seat belts and can simulate dynamic testing. A fixed carrying module 1 is used to carry a dummy 3 and a seat belt, 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 a vehicle braking. The dummy 3 is displaced when the traction force simulating the inertia force is generated. Various test data during the test process are collected by a data acquisition module to detect various performances of the seat belt. The present invention simulates the inertia force of the dummy 3 during the braking process through the traction force of the traction module 2. There is no need for a mobile mechanism for carrying the dummy 3 and a large test site, which saves test space, is easy to operate and use, has high test efficiency and test repeatability, and has low test cost, and has great promotion value.

[0054] A vehicle seat belt testing system, such as Figures 1 to 5 As shown, the system comprises a carrying module 1, a traction module 2, and a data acquisition module. The carrying module 1 is fixedly located at the test site and is used to carry a dummy 3 and the seat belt. The traction module 2 is used to pull the dummy 3 to simulate the inertial force of the dummy 3 during braking. The data acquisition module is used to collect test data during the test. The traction force exerted by the traction module 2 on the dummy 3 is equivalent to the inertial force of the dummy 3 during the actual vehicle braking process. Before the seat belt retracts, the dummy 3 is displaced by the traction force. The data acquisition module collects various test data, allowing dynamic testing of the seat belt to measure the effect of the seat belt on the dislocation of the dummy 3 during actual braking. Furthermore, there is no moving mechanism to carry the dummy 3 or the seat belt, eliminating the need for a large test site and conserving experimental space.

[0055] In one embodiment, the test system of the present invention further includes a judgment module. This judgment module is used to determine whether the test system has been successfully debugged. Specifically, it is used to determine whether the traction force exerted by the traction module on the dummy is satisfactory during debugging. With this judgment module, the test system can perform both debugging and testing operations. After successful debugging, the test system can directly perform seatbelt testing without the need for the judgment module.

[0056] The test system further includes a judgment module, which judges whether the test system is qualified based on 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 if it is 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 during the simulated braking process of the dummy 3 with the same inertial force. The calibration displacement time curve S is collected by the displacement and time relationship of the same test part during the actual vehicle braking process or the vehicle test virtual simulation system. The same inertial force means that the traction force is approximately the same as the inertial force of the dummy 3 in the actual vehicle braking test or the vehicle test virtual simulation system used to obtain the calibration displacement time curve S. For example, the calibration displacement time curve S obtained from the actual vehicle braking test with acceleration a has an inertial force of am on the dummy 3, m is the mass of the test part of the dummy 3, and the traction force f applied by the traction module 2 on the dummy 3 is the same as the inertial force, that is, the traction force f=am, and the acceleration a can vary 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, as Figures 1-2 As shown, traction module 2 simultaneously pulls multiple test areas of dummy 3. The traction force applied by traction module 2 to each test area matches the inertial force of that test area during the actual vehicle braking test. For example, traction module 2's traction force f = a0m, where m is the mass of the test area of ​​dummy 3 and a0 is the braking acceleration of the actual vehicle or the braking acceleration in the vehicle testing virtual simulation system. This can vary over the test time, and the traction force f also changes accordingly. By pulling multiple test areas, traction module 2 can capture their displacement during the simulated braking process, enabling the localized improvement effect of the seatbelt on the driver to be individually examined. Qualified commissioning of multiple test areas provides more accurate feedback on the test system's high accuracy.

[0058] Based on the traction module 2 simultaneously traction of 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. For example, the traction forces on the head 31, chest 32 and abdomen 33 of the dummy 3 are f1=m1a0, f2=m2a0, and f3=m3a0 respectively, where 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 the braking process, the driver's head 31, chest 32 and abdomen 33 have friction between the pelvis and the seat, which offsets the inertia 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 inertia, the three hinge points of the dummy's cervical, thoracic 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 the position during braking.

[0059] In one embodiment, if Figure 1 As shown, the traction module 2 includes a traction drive 21, a traction rope 22, and a strap 23. The strap 23 is used to securely attach to the test area of ​​the dummy 3. The strap 23 is selected based on the test area and is secured to the dummy 3 around the test area. The ends of the traction rope 22 are connected to the strap 23 and the traction drive 21, respectively, to traction the test area of ​​the dummy 3. Preferably, a drive motor is used as the traction drive 21 to facilitate adjustment of the output torque, and thus the traction force. The traction module 2 has a simple structure, with traction power provided by the traction drive 21 and secured to the test area of ​​the dummy 3 via the strap 23. The traction rope 22 connects to the strap 23 to transmit the traction force, thereby traction-enhancing the inertia force of the dummy 3 during the simulated 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 attached to the head 31, chest 32, and abdomen 33 of the dummy 3. The traction drive 21 is located on the same side of the test area. A traction rope 22 pulls the head strap 231 directly in front of the head 31. Two traction ropes 22 are used to pull the chest strap 232 and / or abdomen strap 233 on both sides. Due to the wide chest 32 and abdomen 33, using a single traction rope 22 to pull the traction force can easily deviate significantly from the direction of the inertial force. Using two traction ropes 22 to pull the chest strap 232 and / or abdomen strap 233 in the same direction can avoid the wearing area of ​​the safety belt and avoid affecting the safety belt test results. It can also improve the accuracy of the traction force direction and reduce deviation. When in use, the ends of the two traction ropes 22 away from the test area are both vertically fixed to the same crossbar 24. The traction drive 21 pulls the crossbar 24 at the midpoint of the connection between the two traction ropes 22.

[0063] In one embodiment, the carrier module 1 is described in detail, such as Figure 1 As shown, the carrier module 1 includes a fixed seat 11 and a seatbelt fixing assembly 12. The fixed seat 11 is fixedly installed at the test site, and the seatbelt fixing assembly 12 is used to install and fix the seatbelt. In a specific embodiment, the carrier module 1 also includes a fixing bracket 13. The fixing bracket 13 and the fixed seat 11 are both fixed to the base 10. The fixing bracket 13 is located on one side of the fixed seat 11, and the seatbelt fixing assembly 12 is fixed to the fixing bracket 13. During the test, the dummy 3 is adjusted according to industry regulations (technical requirements and test methods for active pretensioning seatbelts in automobiles) and the posture of the fixed seat 11 and the dummy 3 is recorded. After the seatbelt is installed, the traction module 2 is used to traction the test part of the dummy 3 for testing.

[0064] In one embodiment, the data acquisition module is described in detail, 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 throughout the entire test process. The collectors for collecting specific data can be added or subtracted according to actual needs. For example, an acceleration collector can be added to be installed on the actual vehicle to perform braking detection and 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. 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 includes:

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

[0067] B1, pulling dummy 3 to simulate 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-mentioned step C1, the test data includes a displacement-time curve s of the dummy 3 on the support module 1 during a simulated braking process pulled by an equal inertial force; the equal inertial force means that the pulling 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 used to obtain the calibration displacement-time curve S;

[0070] In step B1, the inertial force of dummy 3 during the braking process is simulated by traction, including determining whether the displacement time curve s is within the error range of the calibration displacement time curve S. If the displacement time curve s is not within the error range of the calibration displacement time curve S, the traction force on dummy 3 is adjusted to simulate the braking test 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 by collecting the displacement of the same test part in the vehicle test virtual simulation system. Whether the displacement time curve s is within the error range of the calibration displacement time curve S can be used to determine whether the test system needs to be debugged to meet the requirements. If it is outside the error range, it needs to be debugged to be within the error range before the seat belt can be tested.

[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 center of mass trajectory of the occupant head 31, as shown in the following example: 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 carried out 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 acquisition module is provided with a corresponding collector corresponding to each item of 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, chest 32 and abdomen 33 of the dummy 3 through the traction rope 22, the cross bar 24 and the belt 23 respectively, and the posture of the dummy 3 and the fixed seat 11 is recorded. The first drive motor 211, the second drive motor 212 and the third drive motor 213 are started, and the displacement time curve and preload force (which can be measured using a force sensor) of the head 31, chest 32 and abdomen 33 of the dummy 3 are recorded to comprehensively judge the tested seat belt data.

[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, applying the same voltage value with different duty cycles can produce different effective voltages, thereby achieving different motor speeds and output torques. This allows for adjusting the traction force exerted by the drive motor on the test area of ​​dummy 3. For example, if a 5V voltage is applied to the drive motor with a 75% duty cycle, the effective voltage is 5V * 75% = 3.75V.

[0076] In actual use, displacement monitoring cameras 4 with built-in time acquisition function are installed on the side and top of the fixed seat 11 respectively; straps 23 are fixedly installed on the head 31, chest 32 and abdomen 33 of the dummy 3 respectively, and the first drive motor 211, the second drive motor 212 and the third drive motor 213 are used to connect the head strap 231, the chest strap 232 and the abdomen strap 233 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 forces on the head 31, chest 32 and abdomen 33 of the dummy 3 respectively meet the requirements of 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 the tested seat belt is replaced and installed on the fixed bracket 13 to dynamically test various data of the seat belt.

[0077] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle seat belt testing system, characterized by: include, A carrying module (1), the carrying module (1) is fixedly arranged and used to carry a dummy (3) and a safety belt; A traction module (2), the traction module (2) is used to pull the dummy (3) to simulate the inertia force of the dummy (3) during braking; A data acquisition module, wherein the data acquisition module is used to collect test data during the test process; The testing method of the testing system includes: Fix the dummy (3) and the safety belt on the carrier 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.

2. A vehicle seat belt testing system according to claim 1, characterized in that: It also includes a judgment module, which is used to judge whether the debugging of the test system is qualified.

3. A vehicle safety belt testing system according to claim 2, characterized in that: 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 collected 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 collected during the braking process of the actual vehicle or in the vehicle test virtual simulation system. The displacement and time relationship of the same test part are collected.

4. A vehicle safety belt testing system according to any one of claims 1 or 2, characterized in that: 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 in a real vehicle braking test state.

5. A vehicle safety belt testing system according to claim 4, characterized in that: 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 according to claim 5, characterized in that: The traction module (2) pulls both sides of the chest (32) and / or abdomen (33) via two traction ropes (22).

7. A vehicle safety belt testing method, using the vehicle safety belt testing system according to any one of claims 1 to 6, characterized in that: The test data includes a displacement time curve s of the dummy (3) on the carrier 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.

8. A vehicle safety belt testing method according to claim 7, characterized in that: 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.

9. The vehicle safety belt testing system according to claim 7, wherein: 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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