Hydrogen leakage detection device and vehicle

Abstract

The invention discloses a hydrogen leakage detection device and a vehicle. The hydrogen leakage detection device is used for the vehicle, the vehicle comprises a frame body and a plurality of hydrogen storage bottles, each hydrogen storage bottle is connected with a bottle opening valve, and the hydrogen leakage detection device comprises a hydrogen concentration detection part, a moving module and a control module; the moving module is connected with the hydrogen concentration detection part and is used for driving the hydrogen concentration detection part to move; the control module is electrically connected with the hydrogen concentration detection part and the moving module, and the control module is used for acquiring position information of the plurality of bottleneck valves, determining a plurality of inspection areas based on the position information of the plurality of bottleneck valves, and controlling the moving module to drive the hydrogen concentration detection part to sequentially move to the plurality of inspection areas so as to perform area inspection on the plurality of inspection areas; wherein the area inspection comprises the steps of obtaining the hydrogen concentration detected by the hydrogen concentration detection piece, and determining whether hydrogen leaks or not based on the hydrogen concentration. According to the scheme, the problem that the hydrogen leakage detection precision is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a hydrogen leakage detection device and a vehicle. Background Art

[0002] Hydrogen, as the fuel of hydrogen fuel cell vehicles, is very easy to leak due to its low density and good diffusivity. In addition, hydrogen is flammable and explosive. Therefore, hydrogen leakage detection is a key step to ensure the safe operation of fuel cell vehicles.

[0003] Since hydrogen has a low density and rises rapidly when leaking, current hydrogen leak detection on vehicles usually involves installing a hydrogen concentration sensor at a high-risk leak point on the vehicle. The hydrogen concentration is detected by the hydrogen concentration sensor and a hydrogen leak is determined when the hydrogen concentration is greater than a certain concentration and lasts for a certain period of time.

[0004] However, due to the extremely easy diffusion of hydrogen, when the hydrogen leakage point is far away from the hydrogen concentration sensor, it is impossible to accurately measure the concentration due to the influence of environmental factors such as vehicle operation and wind speed. Combined with the current hydrogen leakage detection, it is necessary to judge hydrogen leakage only when the hydrogen concentration is greater than a certain concentration and lasts for a certain period of time. It is very likely that hydrogen leakage will occur, but it is impossible to accurately detect hydrogen leakage. Summary of the invention

[0005] The present invention provides a hydrogen leakage detection device and a vehicle to solve the problem of low hydrogen leakage detection accuracy.

[0006] According to one aspect of the present invention, there is provided a hydrogen leakage detection device for a vehicle, the vehicle comprising a frame and a hydrogen storage bottle, the number of the hydrogen storage bottles is multiple, each of the hydrogen storage bottles is connected to a bottle mouth valve, the hydrogen leakage detection device comprises a hydrogen concentration detection element, a mobile module and a control module;

[0007] The moving module is connected to the hydrogen concentration detection element, and the moving module is used to drive the hydrogen concentration detection element to move;

[0008] The control module is electrically connected to the hydrogen concentration detection component and the mobile module. The control module is used to obtain position information of the multiple bottle mouth valves, determine multiple inspection areas based on the position information of the multiple bottle mouth valves, and control the mobile module to drive the hydrogen concentration detection component to move to the multiple inspection areas in sequence to perform regional inspections on the multiple inspection areas; wherein the regional inspection includes: obtaining the hydrogen concentration detected by the hydrogen concentration detection component, and determining whether hydrogen is leaking based on the hydrogen concentration.

[0009] In an optional embodiment of the present invention, the control module is specifically used for:

[0010] Determine an average value of hydrogen concentration within a preset time period based on the hydrogen concentration;

[0011] When the average value of the hydrogen concentration within the preset time period is greater than or equal to the preset hydrogen concentration threshold, a hydrogen leak is determined, and the area identification information of the current inspection area is output;

[0012] When the average value of the hydrogen concentration within a preset time period is less than a preset hydrogen concentration threshold, the moving module is controlled to drive the hydrogen concentration detection element to move to a next inspection area to perform a regional inspection on the next inspection area.

[0013] In an optional embodiment of the present invention, the position information of the bottle mouth valve includes the coordinates of the bottle mouth valve, and the control module is specifically used for:

[0014] When performing regional inspection, the mobile module is controlled to drive the hydrogen concentration detection component to move to the bottle mouth valve coordinates of the current inspection area, and move from the bottle mouth valve coordinates to the inspection trajectory of the current inspection area to move along the inspection trajectory of the current inspection area, wherein the inspection trajectory is circular and takes the bottle mouth valve coordinates as the origin.

[0015] In an optional embodiment of the present invention, the inspection track has a radius of the hydrogen storage bottle.

[0016] In an optional embodiment of the present invention, the control module is specifically used for:

[0017] When the hydrogen concentration detection component does not detect the hydrogen concentration at the initial position, executing the step of controlling the moving module to drive the hydrogen concentration detection component to move to multiple inspection areas in sequence, so as to perform regional inspections on the multiple inspection areas;

[0018] When the hydrogen concentration detection component monitors the hydrogen concentration at the initial position, the moving module is controlled to drive the hydrogen concentration detection component to move to determine the inspection area with the maximum hydrogen concentration, and the inspection area with the maximum hydrogen concentration is determined as the leakage area.

[0019] In an optional embodiment of the present invention, a plurality of the hydrogen storage bottles are arranged in a matrix, the frame includes a plurality of support cross bars, a layer of the hydrogen storage bottles is provided between two adjacent support cross bars, a monitoring point is provided on the support cross bars at the upper end of each layer of the hydrogen storage bottles, and the initial position of the hydrogen concentration detection element is located at the monitoring point on the topmost support cross bar;

[0020] The control module is specifically used for: when the hydrogen concentration detection component detects the hydrogen concentration at the monitoring point corresponding to the initial position, controlling the mobile module to drive the hydrogen concentration detection component to move downward to determine the monitoring point with the largest average hydrogen concentration within a preset time length, and moving laterally along the supporting cross bar where the monitoring point with the largest average hydrogen concentration is located to determine the inspection area with the largest average hydrogen concentration, and determining the inspection area with the largest average hydrogen concentration as the leakage area.

[0021] In an optional embodiment of the present invention, the control module is specifically used for:

[0022] When the hydrogen concentration detection element detects the hydrogen concentration at the monitoring point corresponding to the initial position, the average value of the hydrogen concentration at the monitoring point within the preset time period is recorded;

[0023] Control the moving module to drive the hydrogen concentration detection element to move downward by a first distance to the next monitoring point, record the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element is located within a preset time period, and compare it with the average hydrogen concentration of the previous monitoring point;

[0024] When the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element is located is greater than or equal to the average hydrogen concentration of the previous monitoring point, controlling the moving module to drive the hydrogen concentration detection element to move downward a first distance to the next monitoring point until the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element is located is less than the average hydrogen concentration of the previous monitoring point;

[0025] When the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element is located is less than the average hydrogen concentration of the previous monitoring point, the previous monitoring point is determined to be the monitoring point with the largest average hydrogen concentration, and the moving module is controlled to drive the hydrogen concentration detection element to move upward by the first distance to return to the previous monitoring point.

[0026] In an optional embodiment of the present invention, the control module is specifically used for:

[0027] Determine the horizontal coordinates of the bottle mouth valves corresponding to the plurality of hydrogen storage bottles in the layer adjacent to the lower end of the support crossbar where the monitoring point with the maximum average hydrogen concentration is located;

[0028] Control the moving module to drive the hydrogen concentration detection component to move laterally to the horizontal coordinates of the bottle mouth valves corresponding to the plurality of hydrogen storage bottles in the adjacent layer in sequence, and record the average hydrogen concentration monitored within the preset time period when the hydrogen concentration detection component is located at the horizontal coordinates of the plurality of bottle mouth valves;

[0029] The inspection area where the bottle mouth valve with the largest average hydrogen concentration is located is determined as the leakage area.

[0030] In an optional embodiment of the present invention, the control module is specifically used for:

[0031] The bottle valve identification information of the bottle mouth valve corresponding to the leakage area and the area identification information of the corresponding inspection area are output.

[0032] According to another aspect of the present invention, a vehicle is provided, which includes a frame, a hydrogen storage bottle and the hydrogen leakage detection device described in any embodiment of the present invention, wherein the number of the hydrogen storage bottles is multiple, and each hydrogen storage bottle is provided with a bottle mouth valve.

[0033] The technical solution of the embodiment of the present invention is to drive the hydrogen concentration detection part to move through the mobile module, obtain the position information of the multiple bottle mouth valves through the control module, determine multiple inspection areas based on the position information of the multiple bottle mouth valves, and control the mobile module to drive the hydrogen concentration detection part to move to the multiple inspection areas in sequence, so as to perform regional inspections on the multiple inspection areas; wherein, the regional inspection includes: obtaining the hydrogen concentration detected by the hydrogen concentration detection part, and determining whether hydrogen is leaking based on the hydrogen concentration. In this way, regional inspections can be performed on multiple inspection areas without increasing the number of hydrogen concentration sensors, realizing leakage monitoring when the hydrogen concentration detection part is far away from the leakage point and there is a slight leakage, improving the accuracy and reliability of hydrogen detection, ensuring the hydrogen safety of the entire vehicle, and solving the problem of low accuracy in hydrogen leakage detection.

[0034] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a partial structural schematic diagram of a vehicle to which a hydrogen leakage detection device provided according to Embodiment 1 of the present invention is applied.

[0037] Among them: 1. frame; 11. supporting horizontal bar; 12. supporting vertical bar; 13. bottle storage space; 2. hydrogen storage bottle; 3. bottle mouth valve; 4. hydrogen concentration detection part; 5. mobile module; 6. control module. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] Embodiment 1

[0041] Embodiment 1 of the present invention provides a hydrogen leakage detection device, which can be applied to the situation of hydrogen leakage detection of vehicles, such as Figure 1 As shown, the vehicle includes an on-board hydrogen system, which includes a frame 1 and a hydrogen storage bottle 2. There are multiple hydrogen storage bottles 2, and each hydrogen storage bottle 2 is connected to a bottle mouth valve 3, which is used to ensure the safety and normal inflation and gas supply of the hydrogen storage bottle 2.

[0042] like Figure 1 As shown, the hydrogen leakage detection device includes a hydrogen concentration detection component 4, a mobile module 5 and a control module 6; the mobile module 5 is connected to the hydrogen concentration detection component 4, and the mobile module 5 is used to drive the hydrogen concentration detection component 4 to move; wherein the hydrogen concentration detection component 4 refers to a component that can detect the concentration of hydrogen, and in some embodiments, the hydrogen concentration detection component 4 is a hydrogen concentration sensor. The mobile module 5 refers to a device that can drive the hydrogen concentration detection component 4 to move. Preferably, the mobile module 5 includes a mechanical arm, which is fixedly connected to the frame 1, and the mechanical arm is used to drive the hydrogen concentration detection component 4 to move relative to the frame 1. In other embodiments, the mobile module 5 may also be other devices, as long as it can drive the hydrogen concentration detection component 4 to move, and no specific limitation is made here.

[0043] The control module 6 is electrically connected to the hydrogen concentration detection element 4 and the mobile module 5. The control module 6 refers to a functional module capable of performing logic control. In some embodiments, the control module 6 includes a hydrogen system controller for controlling hydrogen supply of the hydrogen system, collecting system signals, and ensuring system hydrogen safety.

[0044] The control module 6 is used to obtain the position information of multiple bottle mouth valves 3, determine multiple inspection areas based on the position information of the multiple bottle mouth valves 3, and control the moving module 5 to drive the hydrogen concentration detection component 4 to move to the multiple inspection areas in sequence, so as to perform regional inspection on the multiple inspection areas; wherein, the regional inspection includes: obtaining the hydrogen concentration detected by the hydrogen concentration detection component 4, and determining whether the hydrogen is leaking based on the hydrogen concentration.

[0045] Among them, the position information of the bottle mouth valve 3 refers to information that can reflect the specific position of the bottle mouth valve 3 in space. In some embodiments, a coordinate system is established in the vehicle-mounted hydrogen system, and the position information of the bottle mouth valve 3 includes the bottle mouth valve coordinates. The bottle mouth valve coordinates can be specifically two-dimensional coordinates. In this case, a two-dimensional coordinate system is established on the coplanar plane of the hydrogen storage bottle 2 and the bottle mouth valve 3, so that the bottle mouth valve coordinates can reflect the specific position of the bottle mouth valve 3. The inspection area refers to the area included in the regional inspection of the hydrogen storage bottle 2 corresponding to the bottle mouth valve 3.

[0046] The following is a specific example to illustrate the specific method of performing regional inspection on multiple inspection areas. In this example, multiple hydrogen storage bottles 2 are arranged in an array, that is, multiple bottle mouth valves 3 are also arranged in an array, and each bottle mouth valve 3 corresponds to an inspection area. The multiple inspection areas are numbered P11, P12...Pmn in a specific order, and P11 refers to the inspection area of ​​the first row and first column, P12 refers to the inspection area of ​​the first row and second column, and so on, Pmn refers to the inspection area of ​​the mth row and nth column.

[0047] First, the mobile module 5 drives the hydrogen concentration detection component 4 to move from the initial position to the inspection area P11 for regional inspection. If there is no hydrogen leakage in the inspection area P11, it moves to the inspection area P12 for regional inspection, and so on, until all inspection areas have been inspected. After all inspection areas have been inspected, the mobile module 5 drives the hydrogen concentration detection component 4 to return to the initial position. At the same time, when a regional inspection is performed on a certain inspection area, if a hydrogen leakage occurs in the inspection area, a fault alarm is issued. It can be understood that in other embodiments, multiple hydrogen storage bottles 2 can be arranged in other ways, and multiple inspection areas can be numbered in other ways, as long as the hydrogen concentration detection component 4 can be moved to multiple inspection areas in sequence to perform regional inspections on multiple inspection areas.

[0048] In the above scheme, the hydrogen concentration detection part 4 is driven to move by the mobile module 5, the position information of multiple bottle mouth valves 3 is obtained by the control module 6, multiple inspection areas are determined based on the position information of multiple bottle mouth valves 3, and the mobile module 5 is controlled to drive the hydrogen concentration detection part 4 to move to multiple inspection areas in sequence, so as to perform regional inspections on multiple inspection areas; wherein, the regional inspection includes: obtaining the hydrogen concentration detected by the hydrogen concentration detection part 4, and determining whether hydrogen is leaking based on the hydrogen concentration. Therefore, it is possible to perform regional inspections on multiple inspection areas without adding hydrogen concentration detection parts 4, and realize leakage monitoring when the hydrogen concentration detection part 4 is far away from the leakage point and there is a slight leakage, thereby improving the accuracy and reliability of hydrogen detection, ensuring the hydrogen safety of the entire vehicle, and solving the problem of low accuracy of hydrogen leakage detection.

[0049] In an optional embodiment of the present invention, Figure 1 As shown, the control module 6 is specifically used to determine the average value of hydrogen concentration within a preset time period based on the hydrogen concentration.

[0050] When the average value of hydrogen concentration within the preset time period is greater than or equal to the preset hydrogen concentration threshold, hydrogen leakage is determined and the area identification information of the current inspection area is output.

[0051] When the average value of the hydrogen concentration within the preset time period is less than the preset hydrogen concentration threshold, the moving module 5 is controlled to drive the hydrogen concentration detection element 4 to move to the next inspection area to perform regional inspection on the next inspection area.

[0052] Among them, the current inspection area refers to the inspection area where the hydrogen concentration detection device 4 is currently performing regional inspection, and the regional identification information refers to a mark that can identify the inspection area. In some embodiments, the regional identification information is the area number. For example, multiple inspection areas are numbered in a specific order as P11, P12...Pmn, and P11 is the area identification information of the inspection area in the first row and first column.

[0053] The average hydrogen concentration is the average value of the hydrogen concentration within a preset time period. The preset hydrogen concentration threshold refers to the value that the hydrogen concentration does not exceed when there is no hydrogen leakage. The preset time period can be set based on demand. In some embodiments, the preset time period is 5s. In other embodiments, the preset time period is 3s or 4s. No specific limitation is made on the specific value of the preset time period.

[0054] By determining that hydrogen is leaking only when the average hydrogen concentration is greater than or equal to the preset hydrogen concentration threshold within a preset time period, false alarms can be avoided. By outputting the area identification information of the current inspection area when hydrogen leaks, the relatively accurate positioning of the leakage position in the case of hydrogen leakage can be achieved without increasing the number of hydrogen concentration detection parts 4, which is convenient for subsequent maintenance personnel to locate, monitor and operate safely.

[0055] In an optional embodiment of the present invention, the position information of the bottlemouth valve 3 includes the bottlemouth valve coordinates, and the control module 6 is specifically used to: when performing regional inspection, control the mobile module 5 to drive the hydrogen concentration detection component 4 to move to the bottlemouth valve coordinates of the current inspection area, and move from the bottlemouth valve coordinates to the inspection trajectory of the current inspection area to move along the inspection trajectory of the current inspection area, wherein the inspection trajectory is circular and takes the bottlemouth valve coordinates as the origin.

[0056] Among them, the bottle mouth valve coordinates are specifically the two-dimensional coordinates of the center of the bottle mouth valve 3, that is, (X, Y), and the bottle mouth valve coordinates of multiple bottle mouth valves 3 are (X1, Y1), (X2, Y2), ..., (Xn, Yn), respectively. The inspection trajectory refers to the path that the hydrogen concentration detection part 4 will move through when performing regional inspections. Since hydrogen is stored in the hydrogen storage bottle 2, it usually leaks at the position of the bottle mouth valve 3. By making the inspection trajectory circular and taking the bottle mouth valve coordinates as the origin, the hydrogen concentration detection part 4 will first move to the bottle mouth valve coordinates of the current inspection area, and then move from the bottle mouth valve coordinates to the inspection trajectory of the current inspection area to move along the inspection trajectory of the current inspection area. Therefore, during regional inspections, the hydrogen concentration detection part 4 will pass through high-risk leakage areas, and can more accurately detect whether hydrogen is leaking, thereby improving the accuracy and reliability of hydrogen detection and ensuring the hydrogen safety of the entire vehicle.

[0057] On the basis of the above embodiment, the inspection track is based on the radius of the hydrogen storage bottle 2. Since hydrogen is stored in the hydrogen storage bottle 2, hydrogen leakage is through the hydrogen storage bottle 2. By using the radius of the inspection track based on the radius of the hydrogen storage bottle 2, the location of hydrogen leakage can be better covered, and whether hydrogen leakage can be detected more accurately, thereby improving the accuracy and reliability of hydrogen detection.

[0058] In an optional embodiment of the present invention, Figure 1 As shown, the control module 6 is specifically used for: when the hydrogen concentration detection element 4 does not monitor the hydrogen concentration at the initial position, executing the control movement module 5 to drive the hydrogen concentration detection element 4 to move to multiple inspection areas in sequence, so as to perform regional inspections on the multiple inspection areas.

[0059] When the hydrogen concentration detection element 4 detects the hydrogen concentration at the initial position, the moving module 5 is controlled to drive the hydrogen concentration detection element 4 to move to determine the inspection area with the largest hydrogen concentration, and the inspection area with the largest hydrogen concentration is determined as the leakage area.

[0060] The initial position refers to the position of the hydrogen concentration detector 4 when the moving module 5 is not in motion. The leakage area refers to the area where hydrogen leakage occurs.

[0061] When the hydrogen concentration detection element 4 does not detect the hydrogen concentration at the initial position, it means that the hydrogen has not leaked or only leaked slightly, which is difficult to detect directly at the initial position. At this time, the control moving module 5 drives the hydrogen concentration detection element 4 to move to multiple inspection areas in sequence to perform regional inspections on multiple inspection areas, thereby realizing the leakage monitoring of the hydrogen system when the hydrogen concentration detection is far from the leakage point and there is a slight leakage without increasing the number of hydrogen concentration detection elements 4, thereby ensuring the hydrogen safety of the whole vehicle.

[0062] When the hydrogen concentration detection component 4 detects the hydrogen concentration at the initial position, it indicates that there is a hydrogen leakage at this time. The hydrogen concentration is usually higher at the leakage position. At this time, the mobile module 5 is controlled to drive the hydrogen concentration detection component 4 to move to determine the inspection area with the largest hydrogen concentration, and the inspection area with the largest hydrogen concentration is determined as the leakage area. Without increasing the number of hydrogen concentration detection components 4, relatively accurate positioning of the leakage area of ​​the hydrogen system in the case of hydrogen leakage can be achieved, which is convenient for subsequent maintenance personnel to locate, monitor and operate safely.

[0063] In an optional embodiment of the present invention, Figure 1 As shown, a plurality of hydrogen storage bottles 2 are arranged in a matrix, and the frame 1 includes a plurality of support cross bars 11, a layer of hydrogen storage bottles 2 is arranged between two adjacent support cross bars 11, and a monitoring point is arranged on the support cross bars 11 at the upper end of each layer of hydrogen storage bottles 2, and the initial position of the hydrogen concentration detection element 4 is located at the monitoring point on the topmost support cross bar 11. In some embodiments, the frame 1 also includes support vertical bars 12, and the support vertical bars 12 and the support cross bars 11 are crisscrossed to form a plurality of storage bottle spaces 13 for accommodating hydrogen storage bottles 2, and a plurality of hydrogen storage bottles 2 are arranged in the storage bottle spaces 13 in a one-to-one correspondence to form a matrix arrangement, and the monitoring point is located at the intersection of the support vertical bars 12 and the support cross bars 11.

[0064] The control module 6 is specifically used for: when the hydrogen concentration detection component 4 detects the hydrogen concentration at the monitoring point corresponding to the initial position, controlling the moving module 5 to drive the hydrogen concentration detection component 4 to move downward to determine the monitoring point with the largest average hydrogen concentration within a preset time length, and moving laterally along the supporting cross bar 11 where the monitoring point with the largest average hydrogen concentration is located to determine the inspection area with the largest average hydrogen concentration, and determining the inspection area with the largest average hydrogen concentration as the leakage area.

[0065] Among them, since the density of hydrogen is small, it will rise rapidly when leaking, so by setting monitoring points on the support crossbar 11 at the upper end of each layer of hydrogen storage bottles 2, the hydrogen concentration can be better monitored. The hydrogen storage bottle 2 below the monitoring point with the largest average hydrogen concentration within the preset time is the layer of hydrogen storage bottles 2 with the greatest possibility of leakage. Since there are multiple hydrogen storage bottles 2 in each layer, after finding the monitoring point with the largest average hydrogen concentration, by controlling the hydrogen concentration detection part 4 to move horizontally along the support crossbar 11 where the monitoring point with the largest average hydrogen concentration is located, the inspection area with the largest average hydrogen concentration can be detected, and the inspection area is the leakage area. In this way, it is possible to achieve relatively accurate positioning of the leakage area of ​​the hydrogen system in the case of hydrogen leakage without increasing the number of hydrogen concentration detection parts 4, which is convenient for subsequent maintenance personnel to locate, monitor and operate safely. At the same time, judging by the average hydrogen concentration can reduce the occurrence of misjudgment compared to directly judging by the reduction of hydrogen concentration.

[0066] Based on the above embodiments, Figure 1 As shown, the control module 6 is specifically used for: when the hydrogen concentration detection element 4 detects the hydrogen concentration at the monitoring point corresponding to the initial position, recording the average value of the hydrogen concentration at the monitoring point within a preset time period. Among them, the monitoring point corresponding to the initial position is the first monitoring point.

[0067] The control moving module 5 drives the hydrogen concentration detection element 4 to move downward a first distance to the next monitoring point, records the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element 4 is located within a preset time period, and compares it with the average hydrogen concentration of the previous monitoring point. The first distance is the distance between two adjacent monitoring points, which is substantially the same as the sum of the relative distance between two adjacent support crossbars 11 and the width of the support crossbar 11.

[0068] When the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element 4 is located is greater than or equal to the average hydrogen concentration of the previous monitoring point, the control moving module 5 drives the hydrogen concentration detection element 4 to move downward by a first distance to the next monitoring point until the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element 4 is located is less than the average hydrogen concentration of the previous monitoring point. Among them, when the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element 4 is located is greater than or equal to the average hydrogen concentration of the previous monitoring point, it means that the hydrogen concentration is rising during the downward movement of the hydrogen detection element, indicating that the leakage area is not at the previous monitoring point, and is likely to be below, so the control moving module 5 drives the hydrogen concentration detection element 4 to move downward by a first distance to the next monitoring point.

[0069] When the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element 4 is located is less than the average hydrogen concentration of the previous monitoring point, the previous monitoring point is determined to be the monitoring point with the largest average hydrogen concentration, and the moving module 5 is controlled to drive the hydrogen concentration detection element 4 to move upward a first distance to return to the previous monitoring point.

[0070] Among them, when the average hydrogen concentration of the monitoring point where the hydrogen concentration detection component 4 is located is less than the average hydrogen concentration of the previous monitoring point, since the average hydrogen concentration of the previous monitoring point will be greater than the remaining monitoring points above it, and hydrogen leakage will move upward, the previous monitoring point is the monitoring point with the largest average hydrogen concentration. At this time, the control moving module 5 drives the hydrogen concentration detection component 4 to move upward a first distance to return to the previous monitoring point, that is, return to the monitoring point with the largest average hydrogen concentration, so as to facilitate subsequent movement to find the leakage area.

[0071] Compared with measuring the hydrogen concentration of all monitoring points to find the monitoring point with the largest average hydrogen concentration, the above scheme can more quickly find the monitoring point with the largest average hydrogen concentration, saving time for locating the leakage area.

[0072] In an optional embodiment of the present invention, the control module 6 is specifically used to determine the horizontal coordinates of the bottle mouth valves 3 corresponding to the multiple hydrogen storage bottles 2 in the adjacent layer at the lower end of the support crossbar 11 where the monitoring point with the maximum average hydrogen concentration is located.

[0073] The control movement module 5 drives the hydrogen concentration detection component 4 to move laterally to the horizontal coordinates of the bottle mouth valves 3 corresponding to the multiple hydrogen storage bottles 2 in the adjacent layer in sequence, and records the average hydrogen concentration monitored within a preset time length when the hydrogen concentration detection component 4 is located at the horizontal coordinates of the multiple bottle mouth valves 3.

[0074] The inspection area where the bottle mouth valve 3 with the largest average hydrogen concentration is located is determined as the leakage area.

[0075] Among them, since hydrogen leakage usually occurs at the position of the bottle mouth valve 3, the hydrogen concentration detection component 4 is driven to move horizontally to the horizontal coordinates of the bottle mouth valves 3 corresponding to the multiple hydrogen storage bottles 2 in the adjacent layer by directly controlling the moving module 5. At this time, the hydrogen concentration detection component 4 will be directly above the bottle mouth valve 3, so that the detected hydrogen concentration is more accurate, so the leakage area can be located more accurately, which is convenient for subsequent maintenance personnel to locate, monitor and operate safely.

[0076] In an optional embodiment of the present invention, the control module 6 is specifically used to: output the bottle valve identification information of the bottle mouth valve 3 corresponding to the leakage area and the area identification information of the corresponding inspection area.

[0077] The bottle valve identification information of the bottle mouth valve 3 refers to a mark that can identify the bottle mouth valve 3. In some embodiments, the bottle valve identification information is the number of the bottle mouth valve 3. For example, the numbers of the multiple bottle mouth valves 3 are F1, F2, ..., Fn, and the bottle valve identification information of the first bottle mouth valve 3 is F1. It can be understood that in other embodiments, the bottle valve identification information of the bottle mouth valve 3 can also be in other forms, such as a combination of single numbers, a combination of single letters, etc., which is not specifically limited here, but is only used as an example.

[0078] The area identification information of the inspection area refers to a mark that can identify the inspection area. In some embodiments, the area identification information is an area number. For example, multiple inspection areas are numbered P11, P12...Pmn in a specific order, and P11 is the area identification information of the inspection area in the first row and the first column. It can be understood that in other embodiments, the area identification information of the inspection area can also be in other forms, such as a combination of single numbers, a combination of single letters, etc., which is not specifically limited here, but is only an example.

[0079] The specific control method of the present scheme is described below with a specific embodiment. In this embodiment, multiple inspection areas are numbered P11, P12...Pmn in a specific order. First, it is determined whether the hydrogen concentration detection component 4 detects the hydrogen concentration at the initial position. When the hydrogen concentration detection component 4 does not detect the hydrogen concentration at the initial position, the hydrogen concentration detection component 4 is driven by the mobile module 5 to move from the initial position to the inspection area P11 for regional inspection. If there is no hydrogen leakage in the inspection area P11, it is moved to the inspection area P12 for regional inspection, and so on, until all inspection areas have been inspected. After all inspection areas have been inspected, the mobile module 5 drives the hydrogen concentration detection component 4 to return to the initial position. Among them, when performing regional inspection on the current inspection area, the control mobile module 5 drives the hydrogen concentration detection part 4 to move to the bottle mouth valve coordinates of the current inspection area, and moves from the bottle mouth valve coordinates to the inspection trajectory of the current inspection area to move along the inspection trajectory of the current inspection area, wherein the inspection trajectory is circular, and the bottle mouth valve coordinates are used as the origin, and the radius of the hydrogen storage bottle 2 is used as the radius. At the same time, when performing regional inspection on a certain inspection area, if the average value of the hydrogen concentration within a preset time period is greater than or equal to the preset hydrogen concentration threshold, a hydrogen leak is determined, a fault alarm is issued, and the area number of the current inspection area is output. Without increasing the number of hydrogen concentration detection parts 4, the hydrogen system realizes leakage alarm monitoring when the hydrogen concentration detection part 4 is far away from the leakage point and there is a slight leak, thereby ensuring the hydrogen safety of the entire vehicle.

[0080] When the hydrogen concentration detection component 4 detects the hydrogen concentration at the initial position, the average hydrogen concentration C1 within the preset time length is recorded, and then the mobile module 5 is controlled to drive the hydrogen concentration detection component 4 to move downward by the first distance to the next monitoring point, and the average hydrogen concentration C2 of the monitoring point where the hydrogen concentration detection component 4 is located within the preset time length is recorded and compared with the average hydrogen concentration C1 of the previous monitoring point. When C2≧C1, the mobile module 5 is controlled to drive the hydrogen concentration detection component 4 to continue to move downward by the first distance to the next monitoring point and obtain C3. Repeat the comparison and detection of the average hydrogen concentration value. When Cn+1<Cn, the sensor returns to the monitoring point corresponding to Cn, maintains the Y coordinate and moves horizontally, and moves to multiple horizontal bottle mouth valve 3X coordinate positions respectively, and records the average hydrogen concentration Cn1 to Cnn at multiple bottle mouth valve 3X coordinate positions within the preset time length. The maximum value of Cn1 to Cnn is selected, and the bottle valve number of the bottle mouth valve 3 corresponding to the maximum hydrogen concentration average value and the area number of the inspection area are output. Without increasing the number of hydrogen concentration detection elements 4, relatively accurate positioning of the leakage area of ​​the hydrogen system in the event of a hydrogen leak is achieved, facilitating subsequent positioning monitoring and safe operation by maintenance personnel.

[0081] This solution uses a mobile module 5 to integrate with a hydrogen concentration detection component 4. By dividing and inspecting the bottle mouth valve 3 into a matrix-type high-risk leakage area, the hydrogen system's micro-leakage is accurately monitored and large-scale leakage of the hydrogen system is located. Without increasing the number and cost of the hydrogen concentration detection component 4, the hydrogen detection accuracy and reliability are improved to ensure the hydrogen safety of the entire vehicle.

[0082] Embodiment 2

[0083] A second embodiment of the present invention provides a vehicle, such as Figure 1 As shown, the vehicle includes a frame 1, a hydrogen storage bottle 2 and a hydrogen leakage detection device according to any embodiment of the present invention, the number of hydrogen storage bottles 2 is multiple, each hydrogen storage bottle 2 is provided with a bottle mouth valve 3, and the bottle mouth valve 3 is used to ensure the safety and normal filling and gas supply of the hydrogen storage bottle 2. The vehicle generally includes an on-board hydrogen system, and the frame 1 and the hydrogen storage bottle 2 are part of the on-board hydrogen system.

[0084] In an optional embodiment of the present invention, the frame 1 includes a plurality of support cross bars 11, each of which is provided with a monitoring point; a plurality of hydrogen storage bottles 2 are arranged in a matrix, a layer of hydrogen storage bottles 2 is provided between two adjacent support cross bars 11, and the initial position of the hydrogen concentration detection element 4 is located at the monitoring point on the topmost support cross bar 11.

[0085] On the basis of the above embodiment, the frame 1 also includes support vertical rods 12, which are crisscrossed with support horizontal rods 11 to form a plurality of bottle storage spaces 13 for accommodating hydrogen storage bottles 2. The plurality of hydrogen storage bottles 2 are arranged one by one in the bottle storage spaces 13 to form a matrix arrangement.

[0086] Since the vehicle includes the hydrogen leakage detection device of any embodiment of the present invention, the effects of the hydrogen leakage detection device are also possessed by the vehicle mentioned in this embodiment, which will not be described in detail here.

[0087] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0088] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrogen leakage detection device for a vehicle, the vehicle comprising a frame and a hydrogen storage bottle, the number of the hydrogen storage bottles is multiple, each of the hydrogen storage bottles is connected to a bottle mouth valve, characterized in that: The hydrogen leakage detection device comprises a hydrogen concentration detection element, a moving module and a control module; The moving module is connected to the hydrogen concentration detection element, and the moving module is used to drive the hydrogen concentration detection element to move; The control module is electrically connected to the hydrogen concentration detection component and the mobile module. The control module is used to obtain position information of the multiple bottle mouth valves, determine multiple inspection areas based on the position information of the multiple bottle mouth valves, and control the mobile module to drive the hydrogen concentration detection component to move to the multiple inspection areas in sequence to perform regional inspections on the multiple inspection areas; wherein the regional inspection includes: obtaining the hydrogen concentration detected by the hydrogen concentration detection component, and determining whether hydrogen is leaking based on the hydrogen concentration.

2. The hydrogen leakage detection device according to claim 1, characterized in that: The control module is specifically used for: Determine an average value of hydrogen concentration within a preset time period based on the hydrogen concentration; When the average value of the hydrogen concentration within the preset time period is greater than or equal to the preset hydrogen concentration threshold, a hydrogen leak is determined, and the area identification information of the current inspection area is output; When the average value of the hydrogen concentration within a preset time period is less than a preset hydrogen concentration threshold, the moving module is controlled to drive the hydrogen concentration detection element to move to a next inspection area to perform a regional inspection on the next inspection area.

3. The hydrogen leakage detection device according to claim 1, characterized in that: The position information of the bottle mouth valve includes the coordinates of the bottle mouth valve, and the control module is specifically used for: When performing regional inspection, the mobile module is controlled to drive the hydrogen concentration detection component to move to the bottle mouth valve coordinates of the current inspection area, and move from the bottle mouth valve coordinates to the inspection trajectory of the current inspection area to move along the inspection trajectory of the current inspection area, wherein the inspection trajectory is circular and takes the bottle mouth valve coordinates as the origin.

4. The hydrogen leakage detection device according to claim 3, characterized in that: The inspection track has a radius of the hydrogen storage bottle as its radius.

5. The hydrogen leakage detection device according to any one of claims 1 to 4, characterized in that: The control module is specifically used for: When the hydrogen concentration detection component does not detect the hydrogen concentration at the initial position, executing the step of controlling the moving module to drive the hydrogen concentration detection component to move to multiple inspection areas in sequence, so as to perform regional inspections on the multiple inspection areas; When the hydrogen concentration detection component monitors the hydrogen concentration at the initial position, the moving module is controlled to drive the hydrogen concentration detection component to move to determine the inspection area with the maximum hydrogen concentration, and the inspection area with the maximum hydrogen concentration is determined as the leakage area.

6. The hydrogen leakage detection device according to claim 5, characterized in that: The plurality of hydrogen storage bottles are arranged in a matrix, the frame includes a plurality of support cross bars, a layer of hydrogen storage bottles is arranged between two adjacent support cross bars, a monitoring point is arranged on the support cross bar at the upper end of each layer of hydrogen storage bottles, and the initial position of the hydrogen concentration detection element is located at the monitoring point on the topmost support cross bar; The control module is specifically used for: when the hydrogen concentration detection component detects the hydrogen concentration at the monitoring point corresponding to the initial position, controlling the mobile module to drive the hydrogen concentration detection component to move downward to determine the monitoring point with the largest average hydrogen concentration within a preset time length, and moving laterally along the supporting cross bar where the monitoring point with the largest average hydrogen concentration is located to determine the inspection area with the largest average hydrogen concentration, and determining the inspection area with the largest average hydrogen concentration as the leakage area.

7. The hydrogen leakage detection device according to claim 6, characterized in that: The control module is specifically used for: When the hydrogen concentration detection element detects the hydrogen concentration at the monitoring point corresponding to the initial position, the average value of the hydrogen concentration at the monitoring point within the preset time period is recorded; Control the moving module to drive the hydrogen concentration detection element to move downward by a first distance to the next monitoring point, record the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element is located within a preset time period, and compare it with the average hydrogen concentration of the previous monitoring point; When the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element is located is greater than or equal to the average hydrogen concentration of the previous monitoring point, controlling the moving module to drive the hydrogen concentration detection element to move downward a first distance to the next monitoring point until the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element is located is less than the average hydrogen concentration of the previous monitoring point; When the average hydrogen concentration of the monitoring point where the hydrogen concentration detection element is located is less than the average hydrogen concentration of the previous monitoring point, the previous monitoring point is determined to be the monitoring point with the largest average hydrogen concentration, and the moving module is controlled to drive the hydrogen concentration detection element to move upward by the first distance to return to the previous monitoring point.

8. The hydrogen leakage detection device according to claim 6, characterized in that: The control module is specifically used for: Determine the horizontal coordinates of the bottle mouth valves corresponding to the plurality of hydrogen storage bottles in the layer adjacent to the lower end of the support crossbar where the monitoring point with the maximum average hydrogen concentration is located; Control the moving module to drive the hydrogen concentration detection component to move laterally to the horizontal coordinates of the bottle mouth valves corresponding to the plurality of hydrogen storage bottles in the adjacent layer in sequence, and record the average hydrogen concentration monitored within the preset time period when the hydrogen concentration detection component is located at the horizontal coordinates of the plurality of bottle mouth valves; The inspection area where the bottle mouth valve with the largest average hydrogen concentration is located is determined as the leakage area.

9. The hydrogen leakage detection device according to claim 8, characterized in that: The control module is specifically used for: The bottle valve identification information of the bottle mouth valve corresponding to the leakage area and the area identification information of the corresponding inspection area are output.

10. A vehicle, characterized in that: It comprises a frame, a hydrogen storage bottle and the hydrogen leakage detection device according to any one of claims 1 to 9, wherein there are multiple hydrogen storage bottles, and each hydrogen storage bottle is provided with a bottle mouth valve.

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