Hydrogen energy automobile wind tunnel full-spectrum test explosion-proof system and control method

Abstract

The invention discloses a hydrogen energy automobile wind tunnel full spectrum test explosion-proof system and a control method, and relates to the vehicle wind tunnel test explosion-proof field, and the hydrogen energy automobile wind tunnel full spectrum test explosion-proof system comprises a local layer unit which is used for detecting the temperature of each experiment stage of the ground of a wind tunnel environment chamber in real time; the combustible gas concentration, the air temperature and the temperature abnormal point in the wind tunnel environment chamber are detected, and the temperature abnormal point is a high-temperature point with the temperature higher than the surrounding area; and the far stratum unit is used for controlling the power-on state of the wind tunnel environment chamber according to the static temperature of the ground of the wind tunnel environment chamber before an experiment, and performing explosion risk grade judgment and corresponding alarm in combination with various detection data of the local stratum unit in the experiment. The local layer unit detects environmental parameters in the whole experiment process and sends a detection result to the far stratum unit, and the far stratum unit performs explosion risk grade judgment and performs corresponding alarm, so that the safety of the experiment process is improved.

Description

Technical Field

[0001] The invention relates to the field of explosion-proofing for vehicle wind tunnel tests, and in particular to an explosion-proofing system and a control method for full-spectrum tests in a hydrogen-powered automobile wind tunnel. Background Art

[0002] Wind tunnel full spectrum test refers to the use of specific light source equipment (such as full spectrum lamps) in the wind tunnel laboratory to simulate the full spectrum lighting environment from ultraviolet to infrared to test the aerodynamic characteristics, thermodynamic characteristics and optical characteristics of the vehicle under different lighting conditions. By using this technology, technicians can observe the reflection and scattering characteristics of the vehicle body and determine whether the appearance of the vehicle in different environments meets the design requirements. At the same time, it can also simulate the color and brightness of the interior of the vehicle under different light sources to ensure the visibility and comfort of the interior design under different lighting conditions.

[0003] However, the full-spectrum sunlight test equipment for automobile testing has some potential disadvantages in terms of hydrogen explosion prevention, especially for the simulated environment at high altitudes. If there is hydrogen leakage or accumulation inside the equipment, hydrogen may cause an explosion under high temperature or sparks, thereby endangering the safety of the entire equipment and the surroundings. Although the full-spectrum sunlight test equipment will take explosion-proof measures into consideration during design, such as using explosion-proof materials and setting explosion-proof doors, these measures cannot completely eliminate the risk of hydrogen explosion. Especially when the equipment is running for a long time or is improperly maintained, the effectiveness of the explosion-proof measures may be reduced, thereby increasing the possibility of hydrogen explosion. Summary of the invention

[0004] The present application provides an explosion-proof system and control method for a full-spectrum test of a hydrogen-powered vehicle in a wind tunnel, which can solve the technical problem in the prior art that, when conducting a full-spectrum test of a hydrogen-powered vehicle in a high-altitude simulated environment, conventional test equipment uses physical explosion-proof materials in its design, but the physical explosion-proof materials are difficult to maintain and their explosion-proof effect decreases after long-term use.

[0005] In a first aspect, an embodiment of the present application provides a hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system, comprising:

[0006] The local layer unit is used to detect in real time the temperature of each experimental stage on the ground of the wind tunnel environment chamber, as well as the concentration of combustible gas, air temperature and temperature anomaly points in the wind tunnel environment chamber, wherein the temperature anomaly points are high temperature points with a temperature higher than that of the surrounding areas;

[0007] The remote layer unit is used to control the power-on state of the wind tunnel environmental chamber according to the static temperature of the ground of the wind tunnel environmental chamber before the experiment, and to judge the explosion risk level and issue corresponding alarms in the experiment in combination with various detection data of the local layer unit.

[0008] In combination with the first aspect, in one embodiment, the local layer unit includes a temperature sensor, a gas concentration sensor, and an infrared sensor for being arranged in a wind tunnel environment chamber.

[0009] In one embodiment, a vehicle displacement module laid on the floor of the wind tunnel environment chamber and a daylight simulation lamp located on the top of the wind tunnel environment chamber are provided in the wind tunnel environment chamber.

[0010] In one embodiment, the daylight simulation lamp comprises a liftable lamp stand and a water-cooled lamp on the liftable lamp stand, wherein a lamp temperature sensor is disposed in the water-cooled lamp.

[0011] In one embodiment, a steering device connected to the bottom of the liftable lamp stand is provided on the back of the water-cooled lamp.

[0012] In one embodiment, the remote layer unit includes a system control cabinet, and the system control cabinet is provided with a higher-level control PCL for status monitoring, action allocation and coordination of the local layer unit.

[0013] In one embodiment, the remote layer unit is electrically connected to an electrical control unit, and the electrical control unit includes a power distribution cabinet, and the power distribution cabinet is provided with an EPS power supply for providing electrical energy to the wind tunnel environment chamber.

[0014] In a second aspect, the embodiment of the present application provides a control method for controlling the above-mentioned hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system, and the control method specifically includes:

[0015] Based on the static temperature of the ground of the wind tunnel environment chamber before the experiment, the remote layer unit controls the power on and off state of the wind tunnel environment chamber, and when the wind tunnel environment chamber is in the power-on state, the local layer unit performs the detection action;

[0016] Based on the detection results of the local layer unit, the remote layer unit determines the current explosion risk level of the wind tunnel environmental chamber and makes corresponding alarms and explosion-proof measures.

[0017] In combination with the second aspect, in one embodiment, based on the static temperature of the ground of the wind tunnel environment chamber before the experiment, the remote layer unit controls the power on / off state of the wind tunnel environment chamber, and when the wind tunnel environment chamber is in the power-on state, the local layer unit performs a detection action, specifically including:

[0018] The local layer unit obtains the static temperature before the ground experiment in the wind tunnel environmental chamber and transmits the static temperature value to the remote layer unit;

[0019] Based on the temperature value, the remote layer unit performs power-on and power-off actions, and when the wind tunnel environment chamber is in the power-on state, the wind tunnel environment chamber ground adjusts the experimental vehicle posture through its own displacement and generates heat;

[0020] The local layer unit detects the displacement temperature of the ground of the wind tunnel environment chamber, the concentration of combustible gas in the wind tunnel environment chamber, the air temperature and the high temperature point with a temperature higher than that of the surrounding area in real time, and transmits the detection results to the remote layer unit;

[0021] Among them, the remote layer unit performs power on and off actions, specifically: if the static temperature is higher than the preset allowable experimental temperature threshold, the remote layer unit controls the wind tunnel environmental chamber to power off and issues an over-temperature prompt; if the static temperature is lower than the preset allowable experimental temperature threshold, the remote layer unit controls the wind tunnel environmental chamber to power on.

[0022] In one embodiment, based on the monitoring results of the local layer unit, the remote layer unit determines the current explosion risk level of the wind tunnel environment chamber and makes corresponding alarms and explosion prevention measures, specifically including:

[0023] Judgment based on the monitoring results of the local layer unit:

[0024] When the flammable gas concentration or air temperature in the wind tunnel environmental chamber exceeds the preset normal threshold, the remote layer unit will issue a low-level risk warning;

[0025] When the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber exceeds the preset normal threshold, and the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber shows a continuous upward trend, the remote layer unit will issue a medium-level risk warning;

[0026] When the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber reaches the preset danger threshold, or a high temperature point appears in the wind tunnel environmental chamber, or the displacement temperature of the ground of the wind tunnel environmental chamber is higher than the preset allowable experimental temperature threshold, the remote layer unit will issue a high-level risk warning and control the wind tunnel environmental chamber to cut off power.

[0027] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0028] By setting up a local layer unit electrically connected to the remote layer, the local layer unit can detect the environmental parameters before and during the experiment in the wind tunnel environmental chamber, and send the detection results to the remote layer unit. The remote layer unit can judge the current explosion risk by itself through data fusion and take corresponding alarm actions. Compared with traditional physical explosion protection, it can more accurately control the changes in the external environment of the entire experimental process, and take appropriate explosion-proof alarm actions to improve the safety of the entire experimental process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 A schematic diagram of a hydrogen-powered vehicle wind tunnel full-spectrum test explosion-proof system provided in an embodiment of the present application;

[0031] Figure 2 A flow chart of the explosion-proof system for full-spectrum wind tunnel testing of hydrogen-powered vehicles provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the structure of a daylight simulation lamp in a hydrogen-powered vehicle wind tunnel full-spectrum test explosion-proof system provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the structure of a water-cooled lamp in a hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the structure of a steering device in a hydrogen-powered vehicle wind tunnel full-spectrum test explosion-proof system provided in an embodiment of the present application.

[0035] In the figure: 1. Daylight simulation lamp; 101. Liftable lamp stand; 102. Water-cooled lamp; 103. Double-layer insulation shell; 104. Metal halide lamp; 105. Water-cooling pipeline; 2. Steering device; 201. Turn signal bow; 202. Sliding part; 203. Fan-shaped plate; 204. Arc guide groove. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments 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 creative work are within the scope of protection of this application.

[0037] On the first aspect, the embodiments of the present application provide a hydrogen-powered vehicle wind tunnel full-spectrum test explosion-proof system, which can solve the technical problem in the prior art that when conducting full-spectrum tests on hydrogen-powered vehicles in a high-altitude simulated environment, conventional test equipment uses physical explosion-proof materials in its design, but the physical explosion-proof materials are difficult to maintain and their explosion-proof effect decreases after long-term use.

[0038] Figure 1A schematic diagram of a hydrogen-powered vehicle wind tunnel full-spectrum test explosion-proof system provided in an embodiment of the present application, Figure 2 A flow chart of the explosion-proof system for full-spectrum wind tunnel testing of hydrogen-powered vehicles provided in the embodiment of the present application is as follows: Figure 2 As shown, Figure 1 , Figure 2 As shown, the full-spectrum test explosion-proof system in the present application includes a local layer unit and a remote layer unit, wherein the local layer unit is mainly used to ensure the basic environmental parameters in the wind tunnel environmental chamber, and the remote layer unit is used to be electrically connected to the local layer unit, and can receive and process the detection data sent by the local layer unit to control the power on and off status in the wind tunnel environmental chamber. At the same time, the remote layer unit can also integrate various detection data sent by the local layer unit to form a comprehensive environmental status assessment, and judge the explosion risk level of the current environment in the wind tunnel environmental chamber according to the environmental status assessment results, and finally issue corresponding warning information.

[0039] Specifically, the local layer unit is used to detect in real time the temperature of each experimental stage on the ground of the wind tunnel environment chamber, as well as the concentration of combustible gas, air temperature and temperature anomaly points in the wind tunnel environment chamber, wherein the temperature anomaly points are high temperature points with a temperature higher than that of the surrounding areas;

[0040] The remote layer unit is used to control the power-on state of the wind tunnel environmental chamber according to the static temperature of the ground of the wind tunnel environmental chamber before the experiment, and to judge the explosion risk level and issue corresponding alarms in combination with various detection data of the local layer unit during the experiment.

[0041] Before the experiment begins, the local layer unit will conduct a preliminary test on the temperature of the floor of the wind tunnel environmental chamber and make a preliminary judgment based on the test results. If the temperature of the floor of the wind tunnel environmental chamber is too high before the experiment begins, it will be detrimental to the safety of the experiment. The remote layer unit will control the wind tunnel environmental chamber to cut off the power supply, and the staff will take corresponding cooling measures until the temperature of the floor of the wind tunnel environmental chamber drops to a reasonable range. Otherwise, the remote layer unit will control the wind tunnel environmental chamber to be powered on and the experiment can begin.

[0042] During the experiment, it is necessary to constantly adjust the posture and position of the experimental vehicle according to the data collection requirements. The commonly used method is to lay multiple vehicle displacement modules on the floor of the wind tunnel environment chamber. The vehicle displacement module will change the position and posture of the experimental vehicle by its own displacement. However, during the displacement process, the vehicle displacement module will also generate a lot of heat, causing the temperature in the wind tunnel environment chamber to continue to rise. Therefore, the local layer unit will continuously detect the motion temperature of the vehicle displacement module during the experiment, that is, the displacement temperature of the floor of the wind tunnel environment chamber.

[0043] At the same time, the explosion factors of combustible gas are also closely related to the concentration of combustible gas in the air and whether there is an open flame. Therefore, during the experiment, the local layer unit will also detect the combustible gas concentration, air temperature and high temperature points in the cave environment chamber that are higher than the surrounding area. Subsequently, the remote layer unit receives the various detection data of the local layer unit, and integrates the calculations to determine the current explosion risk level and issue a corresponding alarm.

[0044] Specifically, during the experiment, when the flammable gas concentration or air temperature in the wind tunnel environmental chamber exceeds the preset normal threshold, the remote layer unit issues a low-level risk warning; when the flammable gas concentration or air temperature in the wind tunnel environmental chamber exceeds the preset normal threshold, and the flammable gas concentration or air temperature in the wind tunnel environmental chamber shows a continuous upward trend, the remote layer unit issues a medium-level risk warning; when the flammable gas concentration or air temperature in the wind tunnel environmental chamber reaches the preset danger threshold, or a high temperature point appears in the wind tunnel environmental chamber, or the temperature of the wind tunnel environmental chamber ground displacement is higher than the preset allowable experimental temperature threshold, the remote layer unit issues a high-level risk warning and controls the wind tunnel environmental chamber to cut off power.

[0045] It should be noted here that “detecting the ground temperature of the wind tunnel environmental chamber” in this article refers to “detecting the temperature of the vehicle displacement module” and will not be repeated later.

[0046] Furthermore, the local stratigraphic unit includes a temperature sensor, a gas concentration sensor and an infrared sensor for being arranged in the wind tunnel environmental chamber. In one embodiment of the present application, the temperature sensor, the gas concentration sensor and the infrared sensor are all installed in the wind tunnel environmental chamber. The specific installation position and quantity are not limited here. It is sufficient to accurately monitor the combustible gas concentration, air temperature and high temperature points in the wind tunnel environmental chamber.

[0047] Furthermore, Figure 3 A schematic diagram of the structure of a daylight simulation lamp 1 in a hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, a daylight simulation lamp 1 is provided on the top of the wind tunnel environment chamber. The daylight simulation lamp 1 includes a liftable lamp stand 101 and a water-cooled lamp 102 located on the liftable lamp stand 101 . A lamp temperature sensor is provided in the water-cooled lamp 102 .

[0048] The daylight simulation lamp 1 is located at the top of the wind tunnel environment chamber, and can reproduce real natural sunlight. When assembling, the commonly used experimental parameters and vehicle models can be referred to, and the height from the ground, the radiation range, etc. of the water-cooled lamp 102 can be flexibly adjusted in conjunction with the liftable lamp stand 101. There are multiple water-cooled lamps 102 in the daylight simulation lamp 1, each of which is independently set and each of which is provided with a lamp temperature sensor. The lamp temperature sensor can monitor the temperature inside the water-cooled lamp 102 in real time, and is electrically connected to the remote layer unit. The remote layer unit controls the power-on state, brightness and other parameters of the water-cooled lamp 102 according to the lamp temperature sensor.

[0049] As an optional embodiment, a temperature threshold of the water-cooled lamp 102 is set in the remote layer unit in advance. When the temperature of the water-cooled lamp 102 is too high, the remote layer unit controls the water-cooled lamp 102 to cut off power, so that the temperature of the water-cooled lamp 102 can be controlled within a suitable working range, thereby extending the service life of the water-cooled lamp 102.

[0050] Furthermore, Figure 4 A schematic diagram of the structure of a water-cooled lamp 102 in a hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the water-cooled lamp 102 includes a double-layer heat-insulating outer shell 103 and a metal halide lamp 104 located in the double-layer heat-insulating outer shell 103, and a heat-insulating material is provided in the interlayer of the double-layer heat-insulating outer shell 103. The outer shell and inner shell materials of the double-layer heat-insulating outer shell 103 are both made of stainless steel, and the inner and outer shell interlayers are filled with heat-insulating rock wool to prevent the high temperature in the water-cooled lamp 102 from seeping out.

[0051] All joints of the double-layer insulation shell 103 are fully welded to ensure sealing and prevent external hydrogen from entering the double-layer insulation shell 103 and causing an explosion. At the same time, the water-cooled lamp 102 is equipped with a water-cooling pipeline 105, which is cooled by an external chiller. The cooling water is cooled twice by the external chiller and then transported to the water-cooling pipeline 105. The water outlet of the water-cooling pipeline 105 is connected to the return water port of the chiller to form an external circulation for heat exchange, which takes away most of the heat generated by the metal halide lamp 104, so that the internal temperature of the water-cooled lamp 102 is stable within a safe range, can meet the sealing capacity and self-cooling function, and is suitable for long-term and stable use in flammable and explosive occasions.

[0052] Furthermore, as an optional embodiment, in order to further ensure that the interior of the water-cooled lamp 102 is completely isolated from hydrogen, compressed air is used to fill each water-cooled lamp 102 with slightly positive pressure air to prevent hydrogen from entering the double-layer insulation shell 103.

[0053] Further, as an optional embodiment, the liftable lamp stand 101 includes a lifting end and a general frame at the bottom of the lifting end, a load-bearing structure is installed at the top of the wind tunnel, and the liftable lamp stand 101 is installed at the bottom of the load-bearing structure. As an optional embodiment, in order to ensure the lifting stability, the lifting end is set to a scissor lift type, and at least four reel-type steel ropes are set between the load-bearing structure and the general frame to further ensure that the force of the general frame is uniform. It should be noted that the lifting end also includes power devices such as a winch and a motor. The specific structure has no direct relationship with the technical solution in this application and will not be described in detail here.

[0054] Further, as an optional embodiment, the overall frame includes a plurality of lamp frames arranged in parallel, and at least one water-cooled lamp 102 is arranged at the bottom of each lamp frame. The overall frame adopts a modular design, which is convenient for production, manufacturing, transportation, installation, etc. Each two sets of lamp frames are connected by bolts to improve the overall strength of the overall frame after assembly. The main material of the lamp frame is a magnesium-aluminum alloy rectangular tube, and the frame is formed by a welding process. After welding, all welds on the outside are polished and smoothed, and the surface is sprayed with plastic.

[0055] Furthermore, the back of the water-cooled lamp 102 is provided with a steering device 2 connected to the bottom of the liftable lamp stand 101. Figure 5 A schematic diagram of the structure of a steering device 2 in a hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the steering device 2 is mainly used to facilitate flexible adjustment of the direction of the water-cooled lamp 102 according to the experimental progress. Specifically, the steering device 2 includes fan-shaped plates 203 respectively located on both sides of the double-layer insulation shell 103, and the arc-shaped ends of the fan-shaped plates 203 extend horizontally outside the double-layer insulation shell 103, and the arc-shaped ends of the fan-shaped plates 203 are provided with arc-shaped guide grooves 204. The steering device 2 also includes a turn signal bow 201, and the turn signal bow 201 includes a horizontal section arranged along the width direction of the double-layer insulation shell 103 and a longitudinal section located between the two horizontal sections. The free end of the longitudinal section is rotatably connected to the two sides outside the double-layer insulation shell 103, and the longitudinal section is provided with a sliding member 202 located in the arc-shaped guide groove 204.

[0056] That is, in the assembled state, the back of the double-layer insulation shell 103 faces the liftable lamp stand 101, the horizontal section in the turn signal bow 201 is connected to the bottom of the liftable lamp stand 101, and the free ends of the two longitudinal sections in the turn signal bow 201 are respectively rotated to connect the two sides of the double-layer insulation shell 103, and the fan-shaped plate 203 is also arranged on both sides of the double-layer insulation shell 103. The fan-shaped plate 203 includes a gathering end and an arc end. The gathering end of the fan-shaped plate 203 is fixedly connected to the double-layer insulation shell 103, and the arc end of the fan-shaped plate 203 extends toward the back of the double-layer insulation shell 103. The arc guide groove 204 is opened on one end of the plate body of the fan-shaped plate 203 close to the arc end. Based on this structural setting, the turn signal bow 201 is fixedly set, and the water-cooled lamp 102 can rotate relative to the turn signal bow 201, so as to realize the angle adjustment of the water-cooled lamp 102. Furthermore, the water-cooled lamp 102 may be steered manually or may be electrically connected to a remote layer unit to achieve automatic steering, which is not specifically limited in the present application.

[0057] Furthermore, the remote layer unit includes a system control cabinet, which is equipped with an upper control PCL for monitoring the status of the local layer units, allocating and coordinating actions. The local layer units are scheduled by the upper control PCL, and the operating conditions of all components in the local layer units are reported and displayed. The type and location of error information can be transmitted to the upper control PCL, including but not limited to the operating conditions of all components, actual values ​​of all measuring points, error and warning information, maintenance information, errors of fuses, power switches, load switches, etc.

[0058] Furthermore, the remote layer unit is electrically connected to an electrical control unit, which includes a power distribution cabinet. The power distribution cabinet is equipped with an EPS power supply for providing electrical energy to the wind tunnel environmental chamber. The EPS power supply can provide continuous and stable voltage and current to both ends of the bulb of the water-cooled lamp 102, and can also provide compensation for power fluctuations when the bulb is aging, thereby optimizing the working conditions of the bulb. The electrical control unit receives the dispatch of the remote layer unit to realize the control of electrical energy in the wind tunnel environmental chamber.

[0059] Furthermore, as an optional embodiment, an emergency stop button and a buzzer are provided in the power distribution cabinet. When an emergency occurs in the system, the buzzer will sound an alarm, and the operator can press the emergency stop button in time to power off the entire system to ensure that no major safety accidents occur. The power-off operation will not clear the previous test data, and the test data can be exported when the system resumes power supply.

[0060] In a second aspect, the embodiment of the present application provides a control method for controlling the above-mentioned hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system, specifically comprising:

[0061] S1: Based on the static temperature of the ground of the wind tunnel environment chamber before the experiment, the remote layer unit controls the power on and off state of the wind tunnel environment chamber, and when the wind tunnel environment chamber is in the power-on state, the local layer unit performs the detection action;

[0062] S2: Based on the detection results of the local layer unit, the remote layer unit determines the current explosion risk level of the wind tunnel environmental chamber and makes corresponding alarms and explosion-proof measures.

[0063] Further, in step S1, based on the static temperature of the ground of the wind tunnel environment chamber before the experiment, the remote layer unit controls the power on / off state of the wind tunnel environment chamber, and when the wind tunnel environment chamber is in the power-on state, the local layer unit performs a detection action, specifically including:

[0064] S101: The local layer unit obtains the static temperature before the ground experiment in the wind tunnel environment chamber, and transmits the static temperature value to the remote layer unit;

[0065] S102: Based on the temperature value, the remote layer unit performs power on and off actions, and when the wind tunnel environment chamber is in the power-on state, the ground of the wind tunnel environment chamber adjusts the posture of the experimental vehicle through its own displacement and generates heat;

[0066] S103: The local layer unit detects the displacement temperature of the ground of the wind tunnel environment chamber, the concentration of combustible gas in the wind tunnel environment chamber, the air temperature and the high temperature point whose temperature is higher than the temperature of the surrounding area in real time, and transmits the detection results to the remote layer unit;

[0067] Among them, the remote layer unit performs power on and off actions, specifically: if the static temperature is higher than the preset allowable experimental temperature threshold, the remote layer unit controls the wind tunnel environmental chamber to power off and issues an over-temperature prompt; if the static temperature is lower than the preset allowable experimental temperature threshold, the remote layer unit controls the wind tunnel environmental chamber to power on.

[0068] A vehicle displacement module is provided in the wind tunnel environment chamber and is laid on the floor of the wind tunnel environment chamber. The vehicle displacement module will change the position and posture of the experimental vehicle by its own displacement. However, during the displacement process, the vehicle displacement module will also generate a large amount of heat, causing the temperature in the wind tunnel environment chamber to continue to rise. In step S103, the displacement temperature of the floor of the wind tunnel environment chamber refers to the temperature of the vehicle displacement module when it moves during the experiment.

[0069] Furthermore, in step S2, based on the monitoring results of the local layer unit, the remote layer unit determines the current explosion risk level of the wind tunnel environment chamber and makes corresponding alarms and explosion prevention measures, specifically including:

[0070] Judgment based on the monitoring results of the local layer unit:

[0071] When the flammable gas concentration or air temperature in the wind tunnel environmental chamber exceeds the preset normal threshold, the remote layer unit will issue a low-level risk warning;

[0072] When the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber exceeds the preset normal threshold, and the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber shows a continuous upward trend, the remote layer unit will issue a medium-level risk warning;

[0073] When the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber reaches the preset danger threshold, or a high temperature point appears in the wind tunnel environmental chamber, or the displacement temperature of the ground of the wind tunnel environmental chamber is higher than the preset allowable experimental temperature threshold, the remote layer unit will issue a high-level risk warning and control the wind tunnel environmental chamber to cut off power.

[0074] During the entire experiment, the local layer unit performs two-level detection. Before the experiment begins, the local layer unit only detects the static temperature of the ground of the wind tunnel environmental chamber to determine whether the current environment can be used for the experiment. When the experimental conditions are met, the wind tunnel environmental chamber is powered on and the experiment begins. As the second-level detection, the local layer unit will continuously detect the displacement temperature of the ground of the wind tunnel environmental chamber (i.e. the temperature of the vehicle displacement module), the concentration of combustible gases in the wind tunnel environmental chamber, the air temperature and high-temperature points with temperatures higher than those of the surrounding areas during the experiment, and transmit the detection results to the remote layer unit. The remote layer unit performs data fusion, determines the current risk level, and makes corresponding alarms.

[0075] 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 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 application. 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 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.

[0076] It should be noted that, in this application, relational terms such as "first" and "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 presence of other identical elements in the process, method, article or device including the elements.

[0077] 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 and novel features applied for herein.

Claims

1. A hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system, characterized in that: include: The local layer unit is used to detect in real time the temperature of each experimental stage on the ground of the wind tunnel environment chamber, as well as the concentration of combustible gas, air temperature and temperature anomaly points in the wind tunnel environment chamber, wherein the temperature anomaly points are high temperature points with a temperature higher than that of the surrounding areas; The remote layer unit is used to control the power-on state of the wind tunnel environmental chamber according to the static temperature of the ground of the wind tunnel environmental chamber before the experiment, and to judge the explosion risk level and issue corresponding alarms in the experiment in combination with various detection data of the local layer unit.

2. A hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system as claimed in claim 1, characterized in that: The local layer unit includes a temperature sensor, a gas concentration sensor and an infrared sensor which are arranged in a wind tunnel environment chamber.

3. The hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system as claimed in claim 1, characterized in that: A vehicle displacement module laid on the floor of the wind tunnel environment chamber and a daylight simulation lamp (1) located on the top of the wind tunnel environment chamber are provided in the wind tunnel environment chamber.

4. A hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system as claimed in claim 3, characterized in that: The daylight simulation lamp (1) comprises a liftable lamp stand (101) and a water-cooled lamp (102) located on the liftable lamp stand (101), wherein a lamp temperature sensor is provided in the water-cooled lamp (102).

5. A hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system as claimed in claim 4, characterized in that: The back of the water-cooled lamp (102) is provided with a steering device (2) connected to the bottom of the liftable lamp stand (101).

6. The hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system as claimed in claim 1, characterized in that: The remote layer unit comprises a system control cabinet, in which a higher-level control PCL is arranged for status monitoring, action allocation and coordination of the local layer unit.

7. A hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system as claimed in claim 6, characterized in that: The remote layer unit is electrically connected to an electrical control unit, and the electrical control unit includes a power distribution cabinet. The power distribution cabinet is provided with an EPS power supply for providing electrical energy to the wind tunnel environment chamber.

8. A control method for controlling the hydrogen-powered automobile wind tunnel full-spectrum test explosion-proof system according to any one of claims 1 to 7, characterized in that: The control method specifically includes: Based on the static temperature of the ground of the wind tunnel environment chamber before the experiment, the remote layer unit controls the power on and off state of the wind tunnel environment chamber, and when the wind tunnel environment chamber is in the power-on state, the local layer unit performs the detection action; Based on the detection results of the local layer unit, the remote layer unit determines the current explosion risk level of the wind tunnel environmental chamber and makes corresponding alarms and explosion-proof measures.

9. A control method according to claim 8, characterized in that: Based on the static temperature of the ground of the wind tunnel environment chamber before the experiment, the remote layer unit controls the power on / off state of the wind tunnel environment chamber, and when the wind tunnel environment chamber is in the power-on state, the local layer unit performs a detection action, specifically including: The local layer unit obtains the static temperature before the ground experiment in the wind tunnel environmental chamber and transmits the static temperature value to the remote layer unit; Based on the temperature value, the remote layer unit performs power-on and power-off actions, and when the wind tunnel environment chamber is in the power-on state, the wind tunnel environment chamber ground adjusts the experimental vehicle posture through its own displacement and generates heat; The local layer unit detects the displacement temperature of the ground of the wind tunnel environment chamber, the concentration of combustible gas in the wind tunnel environment chamber, the air temperature and the high temperature point with a temperature higher than that of the surrounding area in real time, and transmits the detection results to the remote layer unit; Among them, the remote layer unit performs power on and off actions, specifically: if the static temperature is higher than the preset allowable experimental temperature threshold, the remote layer unit controls the wind tunnel environmental chamber to power off and issues an over-temperature prompt; if the static temperature is lower than the preset allowable experimental temperature threshold, the remote layer unit controls the wind tunnel environmental chamber to power on.

10. A control method according to claim 9, characterized in that: Based on the monitoring results of the local layer unit, the remote layer unit determines the current explosion risk level of the wind tunnel environmental chamber and makes corresponding alarms and explosion prevention measures, including: Based on the monitoring results of the local layer unit: When the flammable gas concentration or air temperature in the wind tunnel environmental chamber exceeds the preset normal threshold, the remote layer unit will issue a low-level risk warning; When the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber exceeds the preset normal threshold, and the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber shows a continuous upward trend, the remote layer unit will issue a medium-level risk warning; When the concentration of combustible gas or the air temperature in the wind tunnel environmental chamber reaches the preset danger threshold, or a high temperature point appears in the wind tunnel environmental chamber, or the displacement temperature of the ground of the wind tunnel environmental chamber is higher than the preset allowable experimental temperature threshold, the remote layer unit will issue a high-level risk warning and control the wind tunnel environmental chamber to cut off power.

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