Door lock burning test method and door lock burning test system

Abstract

The invention discloses a door lock burning test method and a door lock burning test system, and relates to the technical field of vehicle testing. The door lock burning test method comprises the steps that a burning object is placed above a burner, a burning model is selected according to the burning object and a burning position, the burning object comprises a whole vehicle or an independent vehicle door, and the burner comprises a plurality of burning units capable of being independently ignited; according to the combustion model, the corresponding combustion unit is ignited; the combustion state of the combustion object is monitored, and monitoring parameters are obtained; the monitoring parameters are compared with preset parameters corresponding to the selected combustion model, and at least one of the firepower, the ignition number and the ignition position of the combustion unit is adjusted according to the comparison result; and determining whether the door lock of the burning object can complete opening and closing actions or not when the burning time of the burning object reaches a set condition. The method is wide in door lock test application range, feedback data can be provided for whether door lock design is safe and reliable or not according to test detection results, and an improved reference basis is provided for door lock design.

Description

Technical Field

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

[0002] In the context of new energy vehicles, the door opening mechanism has gradually changed from a traditional mechanical structure to an electric structure, which can further improve the intelligence and convenience of the vehicle. However, in the development of new energy vehicles, safety issues have gradually become prominent, especially the frequent spontaneous combustion of new energy vehicles in recent years, which poses a huge threat to personal and property safety. It is particularly important to ensure that drivers and passengers can safely escape from the cabin after the vehicle catches fire. Traditional fuel vehicles also have the problem of difficulty in escaping due to vehicle fire in occasional situations.

[0003] Therefore, reliability testing of door lock safety in vehicle design has become one of the directions for improving vehicle safety. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a door lock fire test method and a door lock fire test system, which can determine the safety of the door lock in a fire by performing a fire test on a vehicle door with a burner.

[0005] The door lock fire test method according to an embodiment of the present invention includes:

[0006] P1: placing a burning object above a burner, and selecting a burning model according to the burning object and the fire location, wherein the burning object includes a whole vehicle or a separate door, and the burner includes a plurality of independently ignitable combustion units;

[0007] P2: Ignite the corresponding combustion unit according to the combustion model;

[0008] P3: monitor the combustion state of the combustion object and obtain monitoring parameters;

[0009] Comparing the monitoring parameters with the preset parameters corresponding to the selected combustion model, and adjusting at least one of the firepower, ignition quantity and ignition position of the combustion unit according to the comparison result;

[0010] P4: When the burning time of the burning object reaches the set condition, determine whether the door lock of the burning object can complete the opening and closing action.

[0011] According to the door lock fire test method of the embodiment of the present invention, a burner with a selectable combustion range is used to test the door lock function of the burning object under different combustion scenarios according to different combustion models. The combustion unit can be ignited independently, and the combustion degree of the burner can be selected for burning objects of different sizes and different requirements. Therefore, this door lock fire test method can simulate different combustion scenarios. The method has a wide range of application for door lock tests and can meet a variety of combustion test requirements, and can further detect and verify the door lock opening and closing function of the burning object under a combustion environment. The test results can provide feedback data on whether the design of the door lock is safe and reliable, providing a reference basis for the design of the door lock to be improved, which is conducive to improving disaster prevention and safety capabilities and ensuring the safety of passengers.

[0012] In some embodiments, step P3 further includes: adjusting the height of the ignited combustion unit according to changes in the preset parameters under the combustion model over time.

[0013] In some embodiments, the monitoring parameter includes at least one of the following parameters: a temperature at a set location, a flame height on the burning object.

[0014] In some embodiments, each of the combustion units has a combustion hole for supplying combustible gas and an air vent for supplying combustion-supporting gas, and the adjusting the fire power of the combustion unit includes:

[0015] When it is necessary to increase the firepower of the combustion unit, increase the flow rate of the combustible gas;

[0016] When it is necessary to reduce the fire power of the combustion unit, the flow rate of the combustible gas is reduced.

[0017] Specifically, among the ignited combustion units, the flow rate of the combustible gas supplied to the combustion units at the middle positions is lower than the flow rate of the combustible gas supplied to the combustion units at the edge positions.

[0018] Further, the burner includes at least one of a fan and a proportional regulating valve:

[0019] When the fan is included, the fan is used to drive the combustion-supporting gas to flow toward the vent, and the wind speed of the fan is increased when the flow rate of the combustible gas is increased, and the wind speed of the fan is decreased when the flow rate of the combustible gas is decreased;

[0020] When the proportional regulating valve is included, the proportional regulating valve includes a first inlet, a second inlet and a valve outlet, the valve outlet is connected to the vent, the first inlet is used for introducing air, and the second inlet is used for introducing oxygen. When the flow rate of the combustible gas is increased, the introduction ratio of the oxygen is increased, and when the flow rate of the combustible gas is reduced, the introduction ratio of the oxygen is decreased.

[0021] Furthermore, when the combustion time of the burning object reaches a preset condition in step P4, the combustion unit is extinguished;

[0022] When the combustion unit is extinguished, the supply of the combustible gas is stopped and the flow rate of the combustion-supporting gas is increased.

[0023] Optionally, steps P3 and P4 are cycled until the door lock cannot complete the opening and closing action, and the total combustion time of the burner on the combustion object is recorded.

[0024] According to the second aspect of the embodiment of the present invention, a door lock fire test system using the above-mentioned door lock fire test method includes: a burner, wherein the burner includes a combustion table, a plurality of combustion units and an ignition device, wherein the combustion table is placed below a burning object, a plurality of the combustion units are arranged on the combustion table and can be ignited and burned independently, and the ignition device is used to ignite each of the combustion units; a detection device, wherein the detection device is used to monitor the combustion state of the burning object and obtain monitoring parameters; and a controller, wherein the controller is electrically connected to the burner and the detection device.

[0025] Specifically, the burner further includes a lifter, and the lifter is connected to the combustion platform to adjust the height of the combustion platform, or the lifter is connected to at least one of the combustion units to adjust the height of the combustion unit.

[0026] Furthermore, the door lock fire test system also includes at least one of the following devices:

[0027] A gas analysis device for collecting internal gas of the combustion object;

[0028] The image acquisition device is used to capture and record the image of the burning object.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 is a flow chart of a door lock fire test according to an embodiment of the present invention;

[0032] Figure 2 is a structural layout diagram of a door lock fire test of some embodiments;

[0033] Figure 3is a schematic diagram of the structure of a controller of some embodiments;

[0034] Figure 4 is a schematic diagram of the burner structure used in the door lock fire test of some embodiments;

[0035] Figure 5 is a schematic side view of a burner of other embodiments;

[0036] Figure 6 is a schematic diagram of the structure of a combustion unit of some embodiments;

[0037] Figure 7 is a schematic structural diagram of a combustion unit in some other embodiments;

[0038] Figure 8 Schematic diagram of the arrangement of temperature collection devices on vehicle doors in some embodiments.

[0039] Reference numerals:

[0040] Burner 100, combustion table 1, wire mesh 11, particles 12, combustion unit 2, combustion hole 21, vent hole 22, lifter 3, gas source pipe 4, branch pipe 5, air pressure valve 6, air pressure gauge 7, flow meter 8, ignition device 9, fan 13, proportional control valve 14, first inlet 141, second inlet 142, valve outlet 143,

[0041] Image acquisition device 200, gas analysis device 300, temperature acquisition device 400, first temperature element 401, second temperature element 402, vehicle 500, vehicle door 510, vehicle body 520, wheel 530, power battery 540,

[0042] Controller 600 , storage module 610 , selection module 620 , control module 630 . DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The door lock fire test method and door lock fire test system according to embodiments of the present invention are described below with reference to the accompanying drawings.

[0047] After the vehicle is designed and produced, a series of tests are required for its safety. Whether the door lock of the vehicle door 510 can be opened in an open flame environment is an important indicator to ensure the safety of passengers. In order to meet people's needs for disaster prevention and safety, and to cope with the frequent fires after the popularization of new energy vehicles, it is necessary to add a door lock fire test to the vehicle safety test. Of course, there is a possibility of fire on new energy vehicles, and there is also a possibility of fire on traditional fuel vehicles, so the door lock fire test can be applicable to both new energy vehicles and traditional fuel vehicles.

[0048] The door lock fire test in the present application needs to be implemented using the door lock fire test system disclosed in the present application.

[0049] To be carried out Figure 1 The door lock flame test shown requires a matching door lock fire test system. The door lock fire test system includes Figure 4 The burner 100 shown, Figure 3The controller 600 shown, the door lock fire test system also includes a detection device. The burner 100 includes a combustion table 1, a plurality of combustion units 2 and an ignition device 9. The combustion table 1 is used to be placed under the combustion object. The plurality of combustion units 2 are arranged on the combustion table 1 and can be ignited and burned independently. The ignition device 9 is used to ignite each combustion unit 2. The detection device is used to monitor the combustion state of the combustion object and obtain monitoring parameters. The controller 600 is electrically connected to the burner 100 and the detection device, and controls the combustion state of the burner 100 according to the detection results.

[0050] The door lock fire test requires burning the entire vehicle 500 or a single door 510 through the door lock fire test system to determine the impact of the burning process on the door lock, and also to determine changes in other components on the vehicle during the burning process. The burner 100 used in the test is placed below the burning object, so that it is easy to ensure that the door lock is in an open flame environment after the burner 100 is ignited. Moreover, the power source of the vehicle is usually the location with the highest probability of fire in the vehicle. The power source of most vehicle models (such as the power battery 540 and the engine) is located on the chassis of the vehicle. After the power source catches fire, the door 510 is located above the fire source. Therefore, in the door lock fire test of this application, the burner 100 is placed below the burning object, which is easy to simulate the impact after the vehicle catches fire.

[0051] Reference Figure 1 and Figure 2 , fire test methods include:

[0052] P1: Place the burning object above the burner 100, and select a combustion model according to the burning object and the fire location. The burning object includes the entire vehicle 500 or a separate vehicle door 510, and the burner 100 includes a plurality of combustion units 2 that can be ignited independently.

[0053] Specifically, in the door lock fire test system used, refer to Figure 3 , the controller 600 at least includes: a storage module 610, a selection module 620, and a control module 630. The storage module 610 is used to store a database of preset multiple combustion models, and the selection module 620 is used to input selection parameters. There is a mapping relationship between the selection parameters and the combustion model. After the selection parameters are input through the selection module 620, the corresponding combustion model can be retrieved from the database of the storage module 610, and the combustion model is transferred to the control module 630. The control module 630 can control the burner 100 according to the setting of the combustion model, control the state of the burner 100, and realize the combustion process.

[0054] In the present application, there are at least two selection parameters, and there may be more selection parameters, each of which is equivalent to a dimension of the database. Specifically, the database stored in the storage module 610 is at least a two-dimensional database, in which one dimension (i.e., one selection parameter) is the burning object, and the other dimension (i.e., another selection parameter) is the fire location.

[0055] There are at least two options for the burning object, that is, there are at least two parameter options for the burning object, namely, the whole vehicle 500 and the separate door 510. As described above, when doing the door lock fire test, the whole vehicle 500 can be used for the fire test, or the door 510 can be removed from the whole vehicle 500, or a door 510 can be assembled separately, and the separate door 510 can be used for the fire test. Both can test the door lock in the fire. The cost of using a separate door 510 test is lower, and more and more comprehensive test data can be obtained by using the whole vehicle 500 test. Of course, this application does not exclude that more options can be set for the burning object, for example, the body can be added, that is, the burning object includes the white body and the door but does not include the chassis, etc. It can be understood that when the burning object is different, the area required to be burned is different, and the number of combustion units 2 to be ignited is also different. The volume of the burning object can be matched with the number and ignition position of the combustion unit 2 ignited by selecting according to the burning object. This avoids the situation where the firepower is insufficient when burning a large combustion object, and also avoids the situation where the firepower is wasted when burning a small combustion object.

[0056] The fire position can be set according to the actual vehicle structure. For example, the fire position can have one option, that is, the power battery 540 fire position, so that the door lock fire test can better match the electric vehicle or hybrid vehicle. Alternatively, the fire position can have one option, that is, the engine fire position, so that the door lock fire test can better match the fuel vehicle. Alternatively, more options can be set for the fire position, for example, the fire position can be the battery, control circuit, exhaust device, etc.

[0057] The fire position can be set according to the relative position of the vehicle. For example, there are three options for the fire position, namely the fire position at the front end of the vehicle, the fire position in the middle of the vehicle, and the fire position at the rear end of the vehicle.

[0058] The combustion model set according to the fire location allows the burning object to simulate the combustion conditions at different fire locations. This can not only verify whether the door lock function is effective at different fire locations, but also observe the impact of different fire locations on the vehicle.

[0059] It should be noted that in this application, a combustion model is set according to the fire position. The combustion model simulates the combustion and fire situation on the vehicle when the fire position is on fire in a real vehicle. Taking the burning object as the door 510 and the fire position as the power battery 540 as an example, the burning object refers to the object used in the combustion test in the test. As described above, the whole vehicle 500 or a separate door 510 can be used for the test and combustion. The fire position refers to the fire position of the vehicle simulated by the combustion model. The fire position in the combustion model is the power battery 540. The power battery 540 is located below the door 510 in the combustion model. Therefore, in the test, the fire directly below the door 510 gradually changes from weak to strong, and the flame height changes from small to large, so that the entire door 510 is gradually in the flame. When using the door 510 for the door lock fire test, it is not necessary to use a real power battery 540 for combustion.

[0060] Of course, in some embodiments, the selection parameters may be more. For example, the selection parameters may also include combustion intensity, that is, the database stored in the storage module 610 may also have a dimension of combustion intensity, which is used to simulate the combustion conditions of the vehicle under different combustion intensities after the vehicle is on fire during use. For example, in some embodiments, the selection parameters may also include combustion climate, that is, the database stored in the storage module 610 may also have a dimension of combustion climate, which is used to simulate the combustion conditions of the vehicle under different climate environments after the vehicle is on fire during use.

[0061] P2: According to the combustion model, the corresponding combustion unit 2 is ignited. Thus, the entire burner 100 is ignited and burned according to the setting of the combustion model, so that the combustion object is in a set open flame combustion state.

[0062] P3: Monitor the combustion state of the combustion object and obtain monitoring parameters; compare the monitoring parameters with the preset parameters corresponding to the selected combustion model, and adjust at least one of the firepower, ignition quantity and ignition position of the combustion unit 2 according to the comparison result.

[0063] Thus, the burner 100 can be adaptively adjusted, that is, the detection device is used to monitor the combustion state of the combustion object to provide feedback on whether the burner 100 is burning according to the setting of the combustion model. According to the comparison result, the firepower is automatically increased where the firepower is insufficient, and the firepower is automatically reduced where the firepower is too strong. In this way, the combustion state of the burner 100 can be intelligently controlled. Of course, since there are multiple combustion units 2 and they can be ignited independently, when the burner 100 is adaptively adjusted, it is not limited to adjusting the firepower size, for example, the number of combustion units 2 ignited where the firepower is insufficient is increased, and the number of combustion units 2 ignited where the firepower is too strong is reduced.

[0064] P4: When the burning time of the burning object reaches the preset condition, determine whether the door lock of the burning object can complete the opening and closing action.

[0065] It is understandable that the door lock fire test of the present application is mainly to verify whether the door lock can still be used normally so that the car door 510 can be opened normally during the burning process of the burning object. Therefore, it is necessary to test whether the door lock can complete the opening and closing action after the burning time reaches the preset conditions.

[0066] The preset conditions here can be set flexibly according to actual needs. For example, the preset condition can be the first set time or a set phenomenon. For example, the set phenomenon is that the door lock cannot complete the opening and closing action, that is, after the test starts, the burning state is maintained without stopping until the door lock is damaged.

[0067] Of course, the set phenomenon in the present application scheme may not be limited to this. For example, it may also be set to melt the surface of the part, etc. These set phenomena can be confirmed by visual inspection, so the control is more flexible.

[0068] In some specific embodiments, when determining whether the door lock can be opened and closed, the burner 100 remains in the ignition state. In this way, there is no need to ignite again when performing the next combustion test, reducing flameout and avoiding waste caused by insufficient combustion of fuel during ignition. In other specific embodiments, when determining whether the door lock can be opened and closed, the burner 100 is extinguished. In this way, when observing the door lock status, there is no flame influence, reducing the danger.

[0069] To facilitate understanding of how the burner 100 cooperates with the setting of the combustion model to perform combustion, the structure of the burner 100 in some embodiments that can implement the door lock fire test method of the present application is briefly introduced here.

[0070] Reference Figure 4 The burner 100 may include a combustion platform 1 and a plurality of combustion units 2 disposed on the combustion platform 1, each combustion unit 2 having at least one combustion hole 21, and each combustion unit 2 may be independently ignited and burned. The fuel of the burner 100 may be gas, liquid, or even solid. The following description will be made by taking the fuel used by the burner 100 as a combustible gas as an example.

[0071] It is understandable that each combustion unit 2 may include one or two or more combustion holes 21, and the number of combustion holes 21 included in a single combustion unit 2 is not limited here. Different combustion units 2 may have the same or different number of combustion holes 21. Each combustion unit 2 may be independently ignited and burned. When the combustion table 1 is placed under the combustion object and one or more combustion units 2 are ignited, the ignition range and combustion speed of the combustion object may be controlled. It is understandable that for the same combustion object, the more combustion units 2 are ignited, the wider the combustion range, and the faster the combustion speed is. For example, when only one combustion unit 2 is ignited, a certain point of the combustion object may be ignited; for another example, when multiple combustion units 2 are ignited and the combustion units 2 are located at different positions of the combustion table 1, multiple places of the combustion object may be ignited; for another example, when multiple combustion units 2 are ignited and the combustion units 2 are arranged adjacent to each other, one place of the combustion object may be ignited to increase the intensity of the flame there.

[0072] The door lock fire test method of the present application adopts a burner 100 with a selectable combustion range to test the door lock function of the burning object in a combustion scenario. The combustion unit 2 can be ignited independently, and the combustion range of the burner 100 is actively selected according to the combustion model design of different sizes and different requirements.

[0073] Therefore, this door lock fire test method can simulate different combustion models. This method has a wide range of application for door lock tests and can meet the test requirements of burning objects of different styles and sizes. It can then detect and verify the door lock opening and closing functions of the burning object under different combustion environments and determine the safety of the burning object. The test results can provide feedback data on whether the door lock design is safe and reliable, providing a reference basis for improving the design of the door lock, which is conducive to improving disaster prevention and safety capabilities and ensuring the safety of passengers.

[0074] This application provides a systematic, standardized and instructive test process method for door lock safety testing, laying a foundation for subsequent door lock safety testing. This door lock fire test method fills the gap in vehicle door lock fire verification and makes the vehicle's security and disaster prevention more complete.

[0075] In order to improve the functional completeness of the method of the present application, some embodiments of the burner 100 that can meet more requirements are provided below.

[0076] In some embodiments, Figure 5As shown, the burner 100 further includes a lifter 3. The lifter 3 is connected to the combustion platform 1 to control the height of the combustion platform 1, or the lifter 3 is connected to at least one combustion unit 2 to control the height of the combustion unit 2. The lifter 3 can adapt to the height of different combustion objects, further improving the simulation capability of the burner 100 for a real fire source and increasing the reliability of the combustion test results.

[0077] The structure of the lifter 3 is not limited here. The lifter 3 may include a slide bar and a slider connected to the slide bar, the lower end of the slide bar is supported on the ground, and the upper end of the slide bar is connected to the combustion platform 1. The lifter 3 may include a scissor-type lifting assembly, or other types of lifting structures.

[0078] The height of the lifter 3 can be achieved by electric control drive, for example, the lifter 3 can be driven by a motor. When the lifter 3 is driven by electric control, it can be remotely controlled, thereby increasing the combustion mode. For example, during the combustion process of the combustion object, the height of the fire source can be controlled by the lifter 3, so that when the fire source is far away from the combustion object, the height can be adjusted to simulate the real situation without affecting the safety of the test personnel, thereby improving the safety of the burner 100. In some schemes, the height of the lifter 3 can be manually driven. For example, when the lifter 3 includes a scissor-type lifting component, the angle of the scissor-type lifting component can be manually adjusted to adjust its height. When the height is manually adjusted, the height of the lifter 3 usually needs to be set in advance before the burner 100 is ignited.

[0079] like Figure 5 As shown, in some embodiments, a wire mesh 11 is provided on the combustion platform 1, particles 12 are laid on the wire mesh 11, and a combustion hole 21 is located below the wire mesh 11. Combustion gas, such as methane, natural gas, etc., can flow through the combustion hole 21. The combustion hole 21 is arranged below the wire mesh 11. The wire mesh 11 can suppress the deflagration flame. Laying particles 12 on the wire mesh 11 can avoid excessive combustion, thereby reducing the risk of explosion and further improving the safety of the burner 100. Some combustion holes 21 can also flow through combustion liquids, such as alcohol, gasoline, etc. Some other combustion holes 21 flow through a mixture, or some combustion holes 21 flow through combustion gas, and some combustion holes 21 flow through combustion liquids.

[0080] like Figure 5 As shown, in some specific embodiments, the particles 12 are sand particles, and the sand particles cover the wire mesh 11. The cost of sand particles is low, which can effectively reduce the risk of explosion and improve the cost performance.

[0081] like Figure 4As shown, in some embodiments, the burner 100 further includes a gas source pipe 4 and a plurality of branch pipes 5, one end of the branch pipe 5 is connected to the gas source pipe 4, and the other end of the branch pipe 5 is connected to at least one combustion unit 2 to supply gas to the combustion hole 21. The gas source pipe 4 can pass combustion gas into the branch pipe 5, and the gas source pipe 4 is a public gas pipeline. According to the flame height and width required for the test, different branch pipes 5 can be ventilated to ignite different combustion units 2 and combustion holes 21, thereby controlling the range of the flame.

[0082] like Figure 4 As shown, in some embodiments, the burner 100 further includes an air pressure valve 6 provided corresponding to each branch pipe 5 , and the air pressure valve 6 can detect and control the combustion gas of each branch pipe 5 .

[0083] like Figure 4 As shown, in some embodiments, the burner 100 also includes a pressure gauge 7 corresponding to each branch pipe 5. By setting the pressure gauge 7, the change of the air pressure in each branch pipe 5 can be detected, and the air pressure condition in the branch pipe 5 can be transmitted to the air pressure valve 6 to adjust the air pressure valve 6.

[0084] Specifically, in order to ensure combustion stability, the pressure change in the branch pipe 5 is checked by the pressure gauge 7, and reverse adjustment can be made to ensure that the gas partial pressure in each branch pipe 5 is equal.

[0085] like Figure 4 As shown, in some embodiments, the burner 100 also includes at least one flow meter 8, which is arranged on the gas source pipe 4 or the branch pipe 5, and can perform quantitative control on the combustion gas. When the combustion gas reaches a preset gas volume, the air pressure valve 6 can be automatically cut off and the gas supply can be stopped.

[0086] like Figure 4 As shown, in some embodiments, the burner 100 further includes an ignition device 9, which can ignite the combustion unit 2. Specifically, the ignition device 9 includes a spark plug corresponding to each combustion unit 2, and the ignition device 9 selects the spark plug of the corresponding combustion unit 2 to start according to the control command, so as to ignite only the combustion unit 2 required by the control command.

[0087] In some specific embodiments, Figure 4 As shown, the combustion holes 21 on the combustion platform 1 are arranged in multiple rows and columns, so that the combustion range can be effectively determined.

[0088] Specifically, the spacing of the combustion holes 21 on the combustion platform 1 can be flexibly set as needed. For example, the size of the combustion platform 1 is 1000*400mm, and the combustion holes 21 are located on both sides of each pipeline in pairs, and a pair of combustion holes 21 is set 100mm apart.

[0089] In some embodiments, Figure 6As shown, each combustion unit 2 has a combustion hole 21 for supplying combustible gas and an air vent 22 for supplying combustion-supporting gas.

[0090] In this way, the fire power of the combustion unit 2 can be adjusted by adjusting the flow rate of the combustible gas. Adjusting the fire power of the combustion unit 2 includes:

[0091] When it is necessary to increase the fire power of the combustion unit 2, increase the flow rate of the combustible gas;

[0092] When it is necessary to reduce the fire power of the combustion unit 2, the flow rate of the combustible gas is reduced.

[0093] The flow rate of combustible gas can be Figure 4 In the embodiment, the output gas flow rate of the gas source pipe 4 is adjusted. The output flow rate of the combustible gas of each combustion unit 2 can also be adjusted.

[0094] In some embodiments, in the ignited combustion unit 2, the flow rate of the combustible gas supplied to the combustion unit 2 at the middle position is lower than the flow rate of the combustible gas supplied to the combustion unit 2 at the edge position. It is understandable that in the test, the burner 100 uses multiple combustion units 2 to ignite. After the multiple combustion units 2 are ignited, the firepower at the middle position of the combustion object is superimposed, making the combustion situation at the middle position intense, resulting in the combustion situation being difficult to control. Therefore, in the test, the combustible gas flow rate supplied to the combustion unit 2 at the middle position is lower, while the combustible gas flow rate supplied to the combustion unit 2 at the edge position is higher, which is conducive to improving the controllability of the overall combustion situation.

[0095] Here, the middle position and the edge position refer to the middle position and the edge position in the ignited combustion unit 2, respectively.

[0096] In some specific embodiments, Figure 6 and Figure 7 As shown, the burner 100 includes at least one of a fan 13 and a proportional control valve 14 .

[0097] like Figure 6 As shown, when the burner 100 includes a fan 13, the fan 13 is used to drive the combustion-supporting gas to flow toward the vent 22. When the flow rate of the combustible gas needs to be increased, the wind speed of the fan 13 is increased, and when the flow rate of the combustible gas needs to be reduced, the wind speed of the fan 13 is decreased. It is understandable that the supply of the combustion-supporting gas can be adjusted by the wind speed, thereby adjusting the degree of flame combustion. Of course, in this process, the supply of the combustible gas is matched with the supply of the combustion-supporting gas to reduce fuel waste and temperature loss caused by excessive supply of the combustion-supporting gas. At this time, the combustion-supporting gas can directly adopt air.

[0098] like Figure 6As shown, when the burner 100 includes a ratio regulating valve 14, the ratio regulating valve 14 includes a first inlet 141, a second inlet 142 and a valve outlet 143, the valve outlet 143 is connected to the vent 22, the first inlet 141 is used to pass air, the second inlet 142 is used to pass oxygen, and the oxygen introduction ratio is increased when the flow rate of the combustible gas needs to be increased, and the oxygen introduction ratio is lowered when the flow rate of the combustible gas needs to be reduced. In this way, the flame combustion degree is adjusted by adjusting the oxygen content. Of course, in this process, the supply of combustible gas is matched with the oxygen supply ratio to reduce fuel waste and temperature loss caused by excessive supply of combustion-supporting gas. With such a design, on the one hand, air can be used to support combustion when the combustion degree is low, reducing costs. When the combustion degree is high, a higher proportion of oxygen can be used to support combustion, and a violent combustion condition can be quickly obtained.

[0099] In some specific embodiments, when the combustion time of the object to be burned in step P4 reaches a preset condition, the combustion unit 2 is extinguished. When the combustion unit 2 is extinguished, the supply of combustible gas is stopped and the flow rate of the combustion-supporting gas is increased. In this way, the flame is blown out by the high-speed flowing combustion-supporting gas, and then the temperature at the flame is taken away, which facilitates and quickly tests whether the door lock can be opened and closed. Such a setting can save test time, and the residual combustible gas can be quickly taken away and diluted with the help of the flow of the combustion-supporting gas, reducing the danger.

[0100] In the present application, the preset combustion model can be set very flexibly and close to the actual combustion situation under different selected parameters. At this time, the combustion state of the burner 100 must adapt to the changes in the combustion model.

[0101] For example, in some embodiments, the number of ignitions and the ignition position of the combustion unit 2 can be adjusted according to the changes of preset parameters in the combustion model over time. Thus, it is possible to simulate the changes of the burning position and intensity of the burning object at different positions on the vehicle over time after the burning object is caught on fire in real conditions. Taking the burning object as the whole vehicle 500 and the fire position as the power battery 540 as an example, the power battery 540 is initially on fire, and the power battery 540 is in a state of burning directly above it, and the intensity of the fire gradually increases. Subsequently, the electric battery ignites other flammable materials around it, such as the wires under the vehicle, tires, the front frame of the vehicle, and the lights. In this way, after the fire, the fire position shows that the fire gradually increases and then gradually weakens, and the fire range gradually spreads from the fire position to the surrounding area, and the fire spreads to the combustibles and the fire gradually increases and then gradually weakens. Therefore, the preset parameters of the fire intensity at each position in the combustion model in the present application can change over time, and the ignition quantity and ignition position of the combustion unit 2 can be adjusted according to the changes in the preset parameters of the fire intensity at each position over time, so that the combustion state of the burning object can be more consistent with the actual combustion condition, which is conducive to improving the authenticity and reliability of the door lock fire test results.

[0102] For example, in some embodiments, the height of the ignited combustion unit 2 is adjusted according to the change of preset parameters in the combustion model over time.

[0103] It is understandable that the temperature of the flame at different positions is different. The flame is divided into the flame core, inner flame and outer flame, and the temperature increases from the inside to the outside. By adjusting the height of the combustion unit 2, the height of the flame ignited by the combustion unit 2 can be adjusted, and the position of the flame core, inner flame and outer flame ignited on the combustion unit 2 can be adjusted. In this way, it is also possible to simulate the changes in the burning position and intensity of the burning object at different positions on the vehicle over time after the fire occurs at different fire positions in real situations.

[0104] For example, taking the burning object as the car door 510 and the fire position as the power battery 540, at the beginning, the power battery 540 catches fire and ignites, and the area directly above the power battery 540 is in a burning state, and the intensity of the fire gradually increases. Then the car seat above the power battery 540 slowly ignites, and after the car seat catches fire, the fire gradually increases and then gradually weakens. Using the above-mentioned height-adjustable burner 100, after the car door 510 is initially ignited, the position of the burner 100 is lowered so that the area below the car door 510 is in the outer flame. As time goes by, the ignited combustion unit 2 is gradually raised, so that the positions of the flame core, inner flame and outer flame are all raised, simulating the effect that the fire of the power battery 540 is weakened while the fire of the car seat is strengthened.

[0105] By utilizing the flame characteristics and cooperating with the height-adjustable control of the combustion unit 2, the change of fire intensity at different heights during the actual combustion process of the combustion object can be simulated, thereby reducing fuel consumption.

[0106] For example, in some embodiments, according to the changes of preset parameters in the combustion model over time, the ignition quantity and ignition position of the combustion unit 2 can be adjusted, and the height of the ignited combustion unit 2 can also be adjusted, thereby further improving the reliability of the fire test and saving fuel consumption.

[0107] In some embodiments, the monitoring parameters include at least one of the following parameters: temperature at a set location, flame height on a burning object, and color at a set location. In this way, the detection device can be flexibly designed, or monitoring accuracy can be improved through diversified parameter design.

[0108] When the monitoring parameter includes the temperature at a set position, the detection device may include a temperature acquisition device 400, such as a temperature sensor resistant to high temperature combustion, and the temperature sensor is installed at the set position, such as directly on the burning object.

[0109] When the monitoring parameters include the flame height of the burning object and the color of the set position, the detection device may include an image acquisition device 200 .

[0110] Here, taking the burning object as a car door 510 as an example, the original color of the car door 510 is white or silver. The car door 510 gradually turns red and then gradually turns black during the burning. The change in the color of the car door 510 can be used to observe the change in the burning state of the car door 510.

[0111] In some embodiments, steps P3 and P4 are cycled until the door lock cannot complete the opening and closing action, and the total time of the burner 100 burning the door 510 is recorded. It is understandable that before the test is completed, it is impossible to determine how long the door lock can maintain the opening and closing function in the combustion environment. Therefore, by cycling the combustion process, the door lock is tested once every combustion, which can simplify the test and eliminate the need to open and close the door 510 in the combustion environment, thereby reducing the difficulty of the test.

[0112] Here, in the cyclic operation, the preset conditions set for each cycle can be the same or different. For example, the preset conditions can be set to 10 minutes during the first combustion, and the preset conditions can be set to 8 minutes during the second combustion, and so on, which helps to improve the detection accuracy.

[0113] In some embodiments, a vehicle is used to conduct a fire test, such as Figure 2 As shown, the fire test also uses a gas analysis device 300, and step P3 also includes: collecting gas inside the vehicle, analyzing and recording the composition of the gas. In this way, it can be tested whether the vehicle is safe during combustion, which is helpful for analyzing the concentration and toxicity of the gas inside the vehicle. Furthermore, it can also be tested whether the oxygen in the vehicle is consumed too quickly and whether toxic gases are produced too quickly under the combustion environment, further completing the test results of vehicle safety.

[0114] Specifically, in step P3, the gas inside the vehicle is collected, and the composition of the gas is analyzed and recorded, including: collecting the gas inside the vehicle at every second set time interval, analyzing and recording the composition and concentration of the collected gas, and recording the changes in the composition and concentration of the gas.

[0115] Here, the interval collection and inspection of the internal gas of the vehicle can control the inspection frequency and thus control the test cost. In addition, it is understandable that the impact of the combustion process on the in-vehicle environment is also gradually accumulated. The collection and inspection at the interval of the second set time can reduce the interference of data results caused by gas instability.

[0116] In some embodiments, Figure 2 As shown, the image acquisition device 200 is also used in the fire test, and step P3 also includes: recording the image of the vehicle door 510. Of course, when the test object is a vehicle, the image acquisition device 200 can also record the image of the entire vehicle 500, so as to further understand the impact of the fire test on the vehicle or the vehicle door 510 more comprehensively.

[0117] When a vehicle is used for the fire test, step P3 further includes: recording the internal image of the vehicle. In this way, the impact of the fire environment on the interior of the vehicle can be further tested, especially the impact of the changes in the interior of the vehicle on the passengers can be observed.

[0118] In some specific embodiments, the image acquisition device 200 includes at least two for capturing images of different positions of the burning object, thereby further improving the richness, comprehensiveness, and reliability of the test results.

[0119] In some specific embodiments, a vehicle is used to conduct a fire test, step P3: processing the interior image of the vehicle, and recording the time when smoke and / or flame appear inside the vehicle;

[0120] When flames appear inside the vehicle, record the location and height of the flames.

[0121] Here, by recording the above data, the safety design requirements of the door lock can be determined, which is helpful to determine the improvement direction of the door lock. For example, the door lock needs to ensure the opening and closing ability, at least before the fire occurs in the car. In this way, before the fire burns into the car, the passengers can open the car door 510 and escape.

[0122] Of course, based on the recording results, the time when smoke, flames and other situations occur can be comprehensively considered to further improve its safety.

[0123] Optionally, step P3 further includes: recording the location and time of a set phenomenon occurring inside the vehicle; the set phenomenon includes: at least one of: melting of the surface layer of a part, expansion of the surface layer of a part, and rupture of the surface layer of a part. Of course, the set phenomenon is not limited to the above-mentioned phenomenon, and can also be other observable phenomena, such as a discoloration layer on the door 510, and the discoloration time of the discoloration layer can be recorded, so as to observe the temperature change on the surface of the door 510.

[0124] In some embodiments, a temperature acquisition device 400 is also used in the fire test, and step P3 further includes: acquiring temperature data of the vehicle or the door 510. Temperature data is important data of the fire test, and the combustion effect of the combustion environment can be determined by observing temperature changes. For example, the temperature data of the door lock of the tested vehicle or the door 510 can be acquired.

[0125] Optionally, the temperature acquisition device 400 may use a thermocouple, etc. For example, if a K-type thermocouple is selected, a suitable model may be selected to match a suitable acquisition frequency. For example, the acquisition frequency of some thermocouples is 1 Hz.

[0126] Specifically, the temperature acquisition device 400 includes a first temperature element 401, and at least two first temperature elements 401 are arranged on the vehicle door 510 from the outside to the inside. In this way, the temperature change of at least two locations from the outside to the inside of the vehicle door 510 can be measured to determine the temperature change at the location of the door lock, thereby determining the safety factor of the door lock. This provides a reliable basis for adjusting the location of the door lock.

[0127] like Figure 5 As shown, when the first temperature element 401 is provided on the vehicle door 510, the first temperature element 401 can also be provided at different heights. In this way, the speed of the height increase can be observed. In particular, the first temperature element 401 provided at the vehicle handle, where the temperature can measure the risk of being scalded when a person opens the door.

[0128] Specifically, a vehicle is used for the fire test, and the temperature collection device 400 includes a second temperature element 402, which is arranged on the power battery 540 of the vehicle. It can be understood that there are many chemical materials in the power battery 540, and the detection result of the second temperature element 402 is helpful to determine the temperature change of the power battery 540 under the combustion environment of an external fire source, thereby determining the possibility of the power battery 540 being ignited.

[0129] In some embodiments, a vehicle is used to conduct a fire test, and the surfaces of the vehicle's wheels 530 and power battery 540 are provided with a fireproof layer.

[0130] The fireproof layer provided on the wheel 530 can isolate the wheel 530 from open flames, reduce the thick smoke generated by combustion, and reduce the toxicity of gases at the combustion site.

[0131] The fireproof layer provided on the power battery 540 can isolate the power battery 540 from open flames, reduce the probability of combustion of the power battery 540, and reduce combustion losses.

[0132] In some specific embodiments, the door lock fire test method of the present application is used on electric vehicles, and it is necessary to prepare test equipment, test point areas, preset test operation processes, data collection processes, etc. in advance, so as to fully verify whether the door lock of the electric vehicle can be used normally after a fire.

[0133] The test site should have no obvious airflow disturbance, the relative humidity should be between 20% and 80%, the temperature should be (23±10)℃, and the indoor space and height should be larger than the area occupied by a vehicle. The test site should be convenient for carrying experimental tools, installing test instruments and placing burners 100100, and equipped with smoke exhaust facilities and fire extinguishing facilities.

[0134] The specific test process includes:

[0135] 1. According to the position of the vehicle door 510 and the position of the burner 100, the temperature collection device 400, i.e., the length of the thermocouple, is cut to ensure the safety of the operator.

[0136] 2. Temperature distribution: Before the test, the interior panels of the four doors 510 are disassembled, and the thermocouples are arranged in the inner panels of the doors 510 from the inside to the outside or from the outside to the inside, such as at the motor end of the motion function mechanism, the motor end of the door lock, the opening mechanism or button end in the door trim, the outer panel of the door 510, the outer opening and unlocking mechanism or button of the door 510, such as Figure 8 As shown in the schematic diagram, the point arrangement can be performed according to the size of the door 510 of the specific vehicle model being tested.

[0137] 3. Arrange a fireproof layer, that is, use heat-insulating cloth to safely protect the tires of the front and rear wheels 530 on one side of the door 510 to be tested and the bottom of the power battery 540, and use non-combustible materials as fire walls in corresponding positions to isolate flame erosion and burning. At the same time, arrange temperature thermocouples near the fire source on the bottom guard plate of the power battery 540 so that its temperature point can be monitored during the test to ensure its safety. If the monitored temperature point poses a safety hazard to the verification process, the verification must be stopped immediately and the power battery 540 must be disassembled before verification.

[0138] 4. Place the burner 100 near the door 510, with a distance of 200mm*mm from the door 510. The center of the burner 100 is located directly below the door 510 handle, ensuring that the entire door lock can be fully exposed to the flame. Place the burner 100 and adjust the air pressure according to the vehicle model and the size of the door 510 to meet the flame height. After the burner 100 is placed, confirm the position of the image acquisition device 200 at the front and rear ends.

[0139] 5. After the test is started and the external fire is burned for 2 minutes, the burner 100 is removed and the parameters of the gas collection components in the vehicle are confirmed and recorded. Then the door 510 is opened and closed four times from inside the vehicle, and finally the door 510 is opened and closed four times from outside the vehicle to confirm whether the door lock and its movement mechanism are in good condition and have no abnormalities.

[0140] The final test results include:

[0141] 1. Record the thermocouple position and the corresponding temperature value;

[0142] 2. Record the door opening and closing process and the status of the door 510 before and after the test;

[0143] 3. If smoke and flames enter the vehicle, observe the time they enter the vehicle and the height of the flames;

[0144] 4. Observe and record the dissolution, expansion, and cracking of the paint on the door 510 and the interior and exterior trim during the test and the corresponding times.

[0145] The structures and operations of other components on the vehicle according to the embodiment of the present invention, such as a control system, a steering system, etc., are well known to those skilled in the art and will not be described in detail here.

[0146] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0147] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A door lock fire test method, characterized in that: include: P1: placing a burning object above a burner, and selecting a burning model according to the burning object and the fire location, wherein the burning object includes a whole vehicle or a separate door, and the burner includes a plurality of independently ignitable combustion units; P2: Ignite the corresponding combustion unit according to the combustion model; P3: monitor the combustion state of the combustion object and obtain monitoring parameters; Comparing the monitoring parameters with the preset parameters corresponding to the selected combustion model, and adjusting at least one of the firepower, ignition quantity and ignition position of the combustion unit according to the comparison result; P4: When the burning time of the burning object reaches a preset condition, determine whether the door lock of the burning object can complete the opening and closing action.

2. The door lock fire test method according to claim 1, characterized in that: Step P3 also includes the following methods: According to the change of the preset parameters in the combustion model over time, the height of the ignited combustion unit is adjusted.

3. The door lock fire test method according to claim 1, characterized in that: The monitoring parameter includes at least one of the following parameters: a temperature of a set position, a flame height on the burning object, and a color of a set position.

4. The door lock fire test method according to any one of claims 1 to 3, characterized in that: Each of the combustion units has a combustion hole for supplying combustible gas and an air vent for supplying combustion-supporting gas, and the method for adjusting the firepower of the combustion unit includes: When it is necessary to increase the firepower of the combustion unit, increase the flow rate of the combustible gas; When it is necessary to reduce the fire power of the combustion unit, the flow rate of the combustible gas is reduced.

5. The door lock fire test method according to claim 4, characterized in that: Among the ignited combustion units, the flow rate of the combustible gas supplied to the combustion units at the middle positions is lower than the flow rate of the combustible gas supplied to the combustion units at the edge positions.

6. The door lock fire test method according to claim 4, characterized in that: The burner includes at least one of a fan and a proportional regulating valve: When the fan is included, the fan is used to drive the combustion-supporting gas to flow toward the vent, and the wind speed of the fan is increased when the flow rate of the combustible gas needs to be increased, and the wind speed of the fan is decreased when the flow rate of the combustible gas needs to be reduced; When the proportional regulating valve is included, the proportional regulating valve includes a first inlet, a second inlet and a valve outlet, the valve outlet is connected to the vent, the first inlet is used for introducing air, and the second inlet is used for introducing oxygen. When the flow rate of the combustible gas needs to be increased, the introduction ratio of the oxygen is increased, and when the flow rate of the combustible gas needs to be reduced, the introduction ratio of the oxygen is decreased.

7. The door lock fire test method according to claim 5, characterized in that: When the combustion time of the burning object reaches a preset condition in step P4, extinguishing the combustion unit; When the combustion unit is extinguished, the supply of the combustible gas is stopped and the flow rate of the combustion-supporting gas is increased.

8. The door lock fire test method according to any one of claims 1 to 3, characterized in that: Steps P3 and P4 are cycled until the door lock cannot complete the opening and closing action, and the total combustion time of the burner on the combustion object is recorded.

9. A door lock fire test system using the door lock fire test method according to any one of claims 1 to 8, characterized in that: include: A burner, the burner comprising a combustion platform, a plurality of combustion units and an ignition device, the combustion platform being used to be placed under a combustion object, a plurality of the combustion units being arranged on the combustion platform and being able to ignite and burn independently, the ignition device being used to ignite each of the combustion units; A detection device, the detection device is used to monitor the combustion state of the combustion object and obtain monitoring parameters; A controller is electrically connected to the burner and the detection device.

10. The door lock fire test system according to claim 9, characterized in that: The burner further includes a lifter, wherein the lifter is connected to the combustion platform to adjust the height of the combustion platform, or the lifter is connected to at least one of the combustion units to adjust the height of the combustion unit.

11. The door lock fire test system according to claim 9, characterized in that: The detection device comprises at least one of the following devices: A gas analysis device for collecting internal gas of the combustion object; An image acquisition device, used to capture and record the image of the burning object; The temperature collecting device is used to collect the temperature of a set position on the combustion object.

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