Automobile tire air leakage driving test device and test method

Abstract

The invention relates to an automobile tire air leakage driving test device and test method, and belongs to the technical field of vehicle test, and the automobile tire air leakage driving test device comprises a test bomb which is provided with a sensor assembly used for collecting the temperature and / or vibration of a support body in a tire; the launching mechanism is used for providing launching kinetic energy for the test bomb, so that the test bomb can impact and be fixed on a tire inner support body; the control module is used for receiving signals of the sensor assembly and judging whether the temperature and / or vibration signals exceed a set threshold value or not, and if yes, the driving mileage of the vehicle is recorded. Therefore, the test bomb is launched by the launching mechanism, so that the test bomb can be hit and fixed on the inner support body of the tire, and the temperature and / or vibration signals of the inner support body can be conveniently acquired through the sensor assembly in the test bomb and are sent to the control module for judgment, so that the driving mileage when the inner support body fails can be recorded; therefore, the convenience and accuracy of the test can be improved to a great extent.

Description

Technical Field

[0001] The present application relates to the field of vehicle testing technology, and in particular to a vehicle tire deflation drivable testing device and a testing method. Background Art

[0002] The military off-road vehicle tire deflated drivability test requires that the vehicle have the ability to "still be able to travel normally for a certain mileage after the tire is pierced by a bullet."

[0003] In the relevant technologies, actual gun shooting is not possible during the development and verification phase, and tests are usually conducted by drilling holes in the tire tread with a drill, deflating the valve core, or installing explosives on the tire tread. Such methods simply simulate the damage caused by bullets to the tire tread, but cannot simulate the damage caused to the tire's internal support after the bullet penetrates the tire and hits the tire's internal support, which is an insufficient assessment.

[0004] In addition, the termination condition of the normal mileage test is usually the smoke of the tire, which is subjective and affects the accuracy of the test. Therefore, it is necessary to study and improve the above method and provide a vehicle tire deflation drivable test device and test method in order to achieve a more practical purpose. Summary of the invention

[0005] In view of the above-mentioned deflationary tire drivability test device and test method, the embodiments of the present application provide a vehicle tire deflation drivability test device and test method, which can greatly improve the convenience and accuracy of the test.

[0006] In a first aspect, an embodiment of the present application provides a vehicle tire deflation drivability test device, comprising:

[0007] A test bomb (1) having a sensor assembly (3) for collecting the temperature and / or vibration of a support body inside a tire;

[0008] A launching mechanism (2) for providing launching kinetic energy for the test bullet (1) so that the test bullet (1) can impact and be fixed on a support body inside the tire;

[0009] The control module is used to receive the signal from the sensor assembly (3) and determine whether the temperature and / or vibration signal exceeds a set threshold value, and if so, record the vehicle mileage.

[0010] In a first aspect, in some embodiments, the test bullet includes a cylindrical body and a conical bullet head fixedly connected to the cylindrical body, and the cylindrical body is provided with a barb.

[0011] In the first aspect, in some embodiments, the barb is movably connected to the cylindrical elastic body, and the cylindrical elastic body is provided with a driving member for driving the barb to extend to the peripheral side of the cylindrical elastic body.

[0012] In the first aspect, in some embodiments, a hole for the barb to extend out is provided on the side wall of the cylindrical elastic body, and the hole is connected to a sliding sleeve for guiding the barb.

[0013] In the first aspect, in some embodiments, the conical bullet has a pointed tip and a side wall, and the side wall is provided with a plurality of barbs inclined toward the direction of the cylindrical bullet body.

[0014] On the first aspect, in some embodiments, the launching mechanism includes a metal ball or a magnetic acceleration channel for accelerating the metal ball, and the metal ball provides launching power for the test bullet through impact.

[0015] On the first aspect, in some embodiments, the magnetic acceleration channel includes a spiral pipe extending in a vertical direction, and the outer wall of the spiral pipe is wound with multiple coils arranged at intervals. The coils generate a magnetic field by connecting a power source to provide acceleration power for the metal ball.

[0016] In the first aspect, in some embodiments, the launching mechanism further comprises a pneumatic power element, and the pneumatic power element provides acceleration power to the metal ball by providing pressurized gas to the spiral pipe.

[0017] On the first aspect, in some embodiments, the end of the magnetic acceleration channel is provided with a contraction opening to prevent the metal ball from escaping, and a launch tube for guiding the test bullet.

[0018] In a second aspect, an embodiment of the present application provides a method for testing the drivability of a deflated automobile tire, using any of the above-mentioned drivability testing devices for deflated automobile tires, the method comprising:

[0019] The test bullet is fired at the tire of the vehicle through the firing mechanism, so that the test bullet hits and is fixed on the inner support of the tire with the designed kinetic energy;

[0020] The vehicle starts to travel at a set speed at a constant speed, and the temperature and / or vibration signals of the support body inside the tire are collected through the sensor assembly in the test bomb;

[0021] The control module receives and determines whether the temperature and / or vibration signal exceeds the set threshold. If so, the vehicle mileage is recorded.

[0022] The beneficial effects of the technical solution provided by this application include:

[0023] The embodiment of the present application provides a vehicle tire deflation drivability test device and test method, which includes a test bullet, which is provided with a sensor component for collecting the temperature and / or vibration of the tire inner support body; a launching mechanism, which is used to provide launching kinetic energy for the test bullet, so that the test bullet can impact and be fixed on the tire inner support body; and a control module, which is used to receive the signal of the sensor component and determine whether the temperature and / or vibration signal exceeds a set threshold value, and if so, record the vehicle mileage.

[0024] Therefore, by launching the test bullet through the launching mechanism, the test bullet can hit and be fixed on the inner support body of the tire, so that the temperature and / or vibration signal of the inner support body can be collected through the sensor component in the test bullet and given to the control module for judgment, so as to record the mileage that can be traveled when the inner support body fails. While simulating the tire wheel being shot, the arrangement of the sensor component is completed by using the test bullet fixed on the inner support body, and then the signal feedback from the sensor component is received by the control module for judgment, so as to record the mileage that can be traveled when the inner support body fails, thereby greatly improving the convenience and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the test bomb of the embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the implementation of the test bomb of the embodiment of the present application;

[0028] Figure 3 Schematic diagram of the structure of the launching mechanism of the embodiment of the present application.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Test projectile; 11. Columnar projectile body; 12. Conical projectile head; 13. Barb; 14. Driving member; 15. Orifice; 16. Sliding sleeve; 17. Barb;

[0031] 2. Launching mechanism; 21. Metal ball; 22. Spiral pipe; 23. Coil; 24. Air pressure power element; 25. Contraction port; 26. Launching tube; 27. Power supply;

[0032] 3. Sensor component. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution or advantage of the embodiment of the present application clearer, the technical solution in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] In view of the above-mentioned deflationary tire drivability test device and test method, the embodiments of the present application provide a vehicle tire deflation drivability test device and test method, which can greatly improve the convenience and accuracy of the test.

[0035] See also Figures 1 to 3 As shown, the first aspect of the embodiment of the present application provides a vehicle tire deflation drivability test device, comprising:

[0036] A test bomb 1, on which a sensor assembly 3 for collecting the temperature and / or vibration of the support body inside the tire is arranged;

[0037] A launching mechanism 2, which is used to provide launching kinetic energy for the test bullet 1, so that the test bullet 1 can impact and be fixed on the inner support of the tire;

[0038] The control module is used to receive the signal from the sensor assembly 3 and determine whether the temperature and / or vibration signal exceeds a set threshold. If so, the vehicle mileage is recorded.

[0039] A sensor assembly 3 is provided on the test bullet 1 of the automobile tire deflation drivable test device in the embodiment of the present application. The test bullet 1 is launched toward the tire by the launching mechanism 2, and the test bullet 1 can penetrate into the tire and hit the inner support body fixed on the outer side of the wheel hub. The test bullet 1 is fixed on the inner support body, and then the temperature and / or vibration signal of the inner support body can be collected by the sensor assembly 3 in the test bullet 1 and given to the control module for judgment, so as to record the mileage that can be driven when the inner support body fails.

[0040] Compared with the prior art, there is no need to install a sensor for measuring temperature or vibration on the inner support in advance, so there is no need to disassemble the tire to expose the inner support. That is, the present application can directly simulate the tire-wheel gunfire while using the test bullet 1 fixed on the inner support to simultaneously complete the arrangement of the sensor assembly 3, and use the signal fed back by the sensor assembly 3 to judge the failure of the inner support, thereby greatly improving the convenience and accuracy of the test.

[0041] Exemplarily, the control module is an electronic control unit (ECU) on the vehicle, and the sensor assembly 3 uses a wireless temperature sensor and / or a wireless acceleration sensor that can transmit signals wirelessly. During the test, the test bullet 1 shoots the inner support of the tire from the side, so that the test bullet 1 is fixed on the side wall of the inner support. The temperature and / or vibration acceleration of the inner support are collected from time to time through the wireless temperature sensor and the wireless acceleration sensor, and wirelessly transmitted to the electronic control unit (ECU). When the electronic control unit (ECU) determines that the temperature and / or vibration signal exceeds the set threshold, the vehicle mileage is recorded.

[0042] It should be noted that the tire wheel inner support is an annular device installed on the rim of a tubeless tire, which is made of special engineering plastic injection molding. It does not affect the normal operation of the wheel at ordinary times, but once the tire is deflated or burst, its outer cylindrical surface contacts the inner wall of the tire crown to support the wheel load, effectively avoiding traffic accidents caused by vehicle loss of control due to tire burst, so that the car can still be controlled and safely drive for a certain distance.

[0043] When the tire deflates and causes the inner support body to roll at zero pressure, the vehicle's maneuverability and handling stability will be greatly affected. The frictional heat generation problem between the inner support body and the tire is very serious, which manifests as the inner support body heating up and the structure becoming out of round, accompanied by severe vibration. Therefore, the out-of-roundness of the inner support body can be judged by monitoring the temperature or vibration of the inner support body.

[0044] Since when the inner support of the tire fails, its temperature and vibration amplitude during driving are significantly different from those when it is not failed, therefore, it is possible to determine whether the inner support has failed by monitoring its temperature or vibration. When it is determined that the inner support has failed, the vehicle mileage is recorded to complete the test.

[0045] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle tire deflated drivable test device, wherein the test bullet 1 of the vehicle tire deflated drivable test device comprises a cylindrical bullet body 11 and a conical bullet head 12 fixedly connected to the cylindrical bullet body 11, and a barb 13 is arranged on the cylindrical bullet body 11.

[0046] The test bullet 1 of the embodiment of the present application includes a cylindrical body 11 and a conical bullet head 12. A barb 13 is installed on the cylindrical body 11. The conical bullet head 12 is convenient for penetrating the tire and piercing into the inner support body. Further, it is convenient for the barb 13 on the cylindrical body 11 to penetrate into the inner support body, thereby stably fixing the test bullet 1 on the inner support body.

[0047] In some optional embodiments, see Figures 1 to 3As shown, an embodiment of the present application provides a vehicle tire deflated drivable test device, in which a barb 13 is movably connected to a cylindrical elastic body 11, and a driving member 14 is provided on the cylindrical elastic body 11 for driving the barb 13 to extend to the peripheral side of the cylindrical elastic body 11.

[0048] The barb 13 of the embodiment of the present application is movably connected to the cylindrical projectile 11, and a driving member 14 is provided on the cylindrical projectile 11 for driving the barb 13 to extend to the side of the cylindrical projectile 11. The barb 13 can be stored inside the cylindrical projectile 11, which is convenient for the test projectile 1 to be launched through the launch tube 26 and penetrate into the tire. When the barb 13 needs to be extended to the side of the cylindrical projectile 11, the driving member 14 can be used to push out the barb 13, which is convenient for fixing the barb 13 on the inner support body. Exemplarily, the driving member 14 can be a miniature electric telescopic rod.

[0049] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle tire deflated drivable test device, wherein a side wall of a cylindrical body 11 of the vehicle tire deflated drivable test device is provided with an opening 15 for extending a barb 13 , and the opening 15 is connected to a sleeve 16 for guiding the barb 13 .

[0050] The side wall of the cylindrical body 11 of the embodiment of the present application is provided with an opening 15, and the opening 15 is fixedly connected with a sliding sleeve 16 located in the cylindrical body 11. The barb 13 can extend along the opening 15 and the sliding sleeve 16. The sliding sleeve 16 can improve the stability of the barb 13 when it is against the surface of the inner support body, thereby avoiding deformation of the opening 15.

[0051] Exemplarily, in this embodiment, the driving member 14 adopts a miniature electric telescopic rod, the end of the electric telescopic rod is fixed in the cylindrical elastic body 11, and the telescopic end is movably connected with the barb 13 through a pin. The barb 13 is arc-shaped, and an arc-shaped hole that slides with the barb 13 is provided on the barb 13, so that the electric telescopic rod can simultaneously push the barbs 13 on both sides along the hole 15 and the sliding sleeve 16 to extend to the surrounding side of the cylindrical elastic body 11.

[0052] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle tire deflated drivable test device, wherein the conical bullet head 12 of the vehicle tire deflated drivable test device has a pointed head and a side wall, and the side wall is provided with a plurality of barbs 17 inclined toward the cylindrical bullet body 11.

[0053] The conical bullet 12 of the embodiment of the present application has a pointed head and a side wall. The pointed head is convenient for penetrating the tire and piercing the inner support body. The side wall is provided with a plurality of barbs 17 inclined toward the cylindrical bullet body 11. The barbs 17 can play a fixing role to prevent the conical bullet 12 from detaching from the inner support body.

[0054] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle tire deflated drivable test device, wherein a launching mechanism 2 of the vehicle tire deflated drivable test device comprises a metal ball 21 or a magnetic acceleration channel for accelerating the metal ball 21, and the metal ball 21 provides launching power for the test bullet 1 through impact.

[0055] The launching mechanism 2 of the embodiment of the present application includes a metal ball 21 and a magnetic acceleration channel. The magnetic acceleration channel can generate a magnetic field and use magnetic force to attract the metal ball 21, so that the metal ball 21 is accelerated in the magnetic acceleration channel. The metal ball 21 hits the test bullet 1, which can provide launching power for the test bullet 1 and eject the test bullet 1.

[0056] Exemplarily, the metal ball 21 is a small iron ball, and the test bullet 1 is arranged at the exit of the magnetic acceleration channel. After being accelerated in the magnetic acceleration channel, the small iron ball will collide with the test bullet 1, so that the test bullet 1 gains kinetic energy and is ejected.

[0057] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle tire deflated drivable test device, wherein the magnetic acceleration channel of the vehicle tire deflated drivable test device comprises a spiral pipe 22 extending in a vertical direction, wherein the outer wall of the spiral pipe 22 is wound with a plurality of coils 23 arranged at intervals, and the coils 23 generate a magnetic field by connecting a power source 27 to provide acceleration power for a metal ball 21.

[0058] The magnetic acceleration channel of the embodiment of the present application includes a spiral pipe 22 extending in the vertical direction, and the outer wall of the spiral pipe 22 is wound with multiple coils 23 arranged at intervals. For example, the metal ball 21 is an iron ball. When the iron ball slides along the spiral pipe 22 under the action of gravity, the multiple coils 23 are powered on and off in turn, and the magnetic field is used to attract the iron ball section by section to achieve acceleration of the iron ball.

[0059] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle tire deflated drivable test device, wherein the launching mechanism 2 of the vehicle tire deflated drivable test device further comprises a pneumatic power element 24, which provides acceleration power to the metal ball 21 by providing pressurized gas to the spiral pipe 22.

[0060] The launching mechanism 2 of the embodiment of the present application further includes a pneumatic power element 24, which is used to fill high-pressure gas into the spiral pipe 22, and uses the high-pressure gas to push the metal ball 21, thereby further accelerating the metal ball 21. Exemplarily, the pneumatic power element 24 is an air compressor that can generate and temporarily store compressed gas.

[0061] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle tire deflated drivable test device, wherein the end of the magnetic acceleration channel of the vehicle tire deflated drivable test device is provided with a contraction opening 25 for preventing the metal ball 21 from escaping, and a launch tube 26 for guiding the test bullet 1.

[0062] The end of the magnetic acceleration channel of the embodiment of the present application is provided with a contraction port 25 to prevent the metal ball 21 from escaping. The test bullet 1 can be inserted at the contraction port 25, which is convenient for arranging the test bullet 1. At the same time, after the metal ball 21 hits the test bullet 1, it is restricted by the contraction port 25 and will not escaping from the magnetic acceleration channel and be ejected with the metal ball 21. Furthermore, the contraction port 25 is connected to a launch tube 26, and the test bullet 1 moves in the launch tube 26, which can improve the safety of the test.

[0063] See also Figures 1 to 3 As shown, the second aspect of the embodiment of the present application provides a method for testing the drivability of a deflated automobile tire, using a deflated automobile tire drivability testing device according to any of the above embodiments, the method comprising:

[0064] Step S1: launching a test bullet 1 at a tire of a vehicle through a launching mechanism 2, so that the test bullet 1 hits an inner support body of the tire with a designed kinetic energy and is fixed on the inner support body through a barb 13 on the test bullet 1;

[0065] Step S2: the vehicle starts to travel at a set speed, and the temperature signal and / or vibration signal of the inner support body is collected by the sensor assembly 3 in the test bomb 1;

[0066] Step S3: Receive and determine whether the temperature and / or vibration signal exceeds a set threshold through the control module. If so, record the vehicle mileage.

[0067] The test method of the embodiment of the present application uses the automobile tire deflation test device of any of the above-mentioned embodiments to directly simulate the tire wheel being shot at, and at the same time, completes the arrangement of the sensor component 3 using the test bullet 1 fixed on the inner support body, and uses the signal fed back by the sensor component 3 to judge the failure of the inner support body, thereby greatly improving the convenience and accuracy of the test.

[0068] Exemplarily, step S1: launching a test bullet 1 at a tire of a vehicle through a launching mechanism 2, so that the test bullet 1 hits an inner support body of the tire with a designed kinetic energy and is fixed on the inner support body;

[0069] For example, it is required to use an AK-47φ7.62mm (10g) bullet for testing, the muzzle kinetic energy of which is approximately 5000 joules. This kinetic energy requirement can be met by changing the mass of the metal ball 21 or shortening the shooting distance.

[0070] Step S2: The vehicle starts to travel at a set speed, and the temperature signal and / or vibration signal of the inner support body is collected through the sensor component 3 in the test bomb 1; for example, the vehicle starts to travel at a speed of 30-40km / h, and the sensor component 3 uses a wireless temperature sensor or a wireless acceleration sensor and is connected to the control module signal.

[0071] Step S3: Receive and determine whether the temperature and / or vibration signal exceeds the set threshold through the control module. If so, record the vehicle mileage. For example, the control module uses an electronic controller (ECU) on the vehicle, which can constantly receive the temperature and / or vibration signal collected by the sensor assembly 3. When the temperature exceeds 120°C, it determines that the tire support body has failed and records the mileage, or when the vertical vibration acceleration of the support body exceeds 0.4g, it determines that the tire support body has failed and records the mileage;

[0072] Or a comprehensive judgment can be made based on both temperature and vibration acceleration. Furthermore, a preset duration limit can be added to the judgment condition to avoid accidental signals. For example, when the temperature exceeds 120°C and lasts for 60 seconds, the tire support is judged to have failed, the test is terminated and the mileage is recorded; or when the vertical vibration acceleration of the support exceeds 0.4g and lasts for 60 seconds, the tire support is judged to have failed, the test is terminated and the mileage is recorded.

[0073] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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 application or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise expressly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0074] It should be noted that, in this application, relational terms such as "first" or "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0075] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles or novel features applied for herein.

Claims

1. A vehicle tire deflation drivability test device, characterized in that: include: A test bomb (1) having a sensor assembly (3) for collecting the temperature and / or vibration of a support body inside a tire; A launching mechanism (2) for providing launching kinetic energy for the test bullet (1) so that the test bullet (1) can impact and be fixed on a support body inside the tire; The control module is used to receive the signal from the sensor assembly (3) and determine whether the temperature and / or vibration signal exceeds a set threshold value, and if so, record the vehicle mileage.

2. The vehicle tire deflation drivability test device according to claim 1, characterized in that: The test bullet (1) comprises a cylindrical bullet body (11) and a conical bullet head (12) fixedly connected to the cylindrical bullet body (11); the cylindrical bullet body (11) is provided with a barb (13).

3. The vehicle tire deflation drivability test device according to claim 2, characterized in that: The barb (13) is movably connected to the columnar elastic body (11), and a driving member (14) is provided on the columnar elastic body (11) for driving the barb (13) to extend to the peripheral side of the columnar elastic body (11).

4. The vehicle tire deflation drivability test device as claimed in claim 3, characterized in that: The side wall of the cylindrical elastic body (11) is provided with an opening (15) for the barb (13) to extend out, and the opening (15) is connected to a sliding sleeve (16) for guiding the barb (13).

5. The vehicle tire deflation drivability test device as claimed in claim 2, characterized in that: The conical bullet head (12) has a pointed head and a side wall, and the side wall is provided with a plurality of barbs (17) inclined toward the columnar bullet body (11).

6. The vehicle tire deflation drivability test device according to claim 1, characterized in that: The launching mechanism (2) comprises a metal ball (21) or a magnetic acceleration channel for accelerating the metal ball (21), and the metal ball (21) provides launching power for the test bullet (1) through impact.

7. The vehicle tire deflation drivability test device according to claim 6, characterized in that: The magnetic acceleration channel comprises a spiral pipe (22) extending in a vertical direction, the outer wall of the spiral pipe (22) is wound with multiple coils (23) arranged at intervals, and the coils (23) generate a magnetic field by connecting a power source (27) to provide acceleration power for the metal ball (21).

8. The vehicle tire deflation drivability test device according to claim 7, characterized in that: The launching mechanism (2) further comprises a pneumatic power element (24), wherein the pneumatic power element (24) provides acceleration power for the metal ball (21) by providing pressurized gas to the spiral pipe (22).

9. The vehicle tire deflation drivability test device according to claim 7, characterized in that: The end of the magnetic acceleration channel is provided with a contraction opening (25) for preventing the metal ball (21) from escaping, and a launch tube (26) for guiding the test bullet (1).

10. A vehicle tire deflated drivability test method, using the vehicle tire deflated drivability test device as claimed in any one of claims 1 to 9, characterized in that: Methods include: The test bullet (1) is launched at the tire of the vehicle through the launching mechanism (2), so that the test bullet (1) hits and is fixed on the inner support body of the tire with the designed kinetic energy; The vehicle starts to travel at a set speed at a constant speed, and the temperature and / or vibration signal of the support body inside the tire is collected through the sensor assembly (3) in the test bomb (1); The control module receives and determines whether the temperature and / or vibration signal exceeds the set threshold. If so, the vehicle mileage is recorded.

Images