Gas leakage detection method and system

Abstract

The invention relates to a gas leakage detection method and system, and an acquisition and processing device applied to the gas leakage detection system, the system comprises an unmanned aerial vehicle, a sampling device, a rotating wheel device and an acquisition and processing device, and the sampling device, the rotating wheel device and the acquisition and processing device are fixed on the unmanned aerial vehicle; the method comprises the steps that collected to-be-detected gas is detected, and the to-be-detected gas is obtained by collecting gas in the environment where detected equipment is located through a sampling device under the condition that the extension length of a sampling pipe of the sampling device is adjusted to the reference extension length; the extension length of the sampling pipe is adjusted based on the reference extension length through a rotating wheel device in the detection system. According to the invention, the accuracy of gas leakage detection can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of unmanned aerial vehicle gas leakage detection, in particular to a gas leakage detection method and system. BACKGROUND

[0002] As an important scene of hydrogen energy application, the safety of hydrogen refueling station has always been concerned. Hydrogen is a flammable and explosive gas with a very wide explosive concentration range (for example, the Lower Explosive Limit is 4% and the Upper Explosive Limit is 75%), and the minimum ignition energy is very low. Moreover, due to the extremely low energy density of hydrogen at normal temperature and pressure, it needs to be stored at ultra-low temperature or ultra-high pressure, so hydrogen has strong permeability and can easily leak from flanges, threads or other mating surfaces. Hydrogen can also react with many substances, such as hydrogen embrittlement of metals, and these characteristics determine the high risk of hydrogen. However, hydrogen refueling stations are prone to leakage during actual operation. How to accurately monitor whether hydrogen leaks and provide early warning becomes an important guarantee for the safe operation of hydrogen refueling stations and an important measure to reduce the consequences of accidents.

[0003] In the prior art, hydrogen refueling stations generally use fixed detection of hydrogen gas and on-site personnel inspection to prevent hydrogen leakage, and currently, the main method for detecting hydrogen leakage sources is to use infrared identification of leakage sources based on the low-temperature characteristics of liquid hydrogen. However, using unmanned aerial vehicles for detection, the airflow generated by the propeller of the unmanned aerial vehicle has a great influence on the measurement results, and the detector is in the form of an external mount, so how to simply and effectively obtain power for the detection unit itself is a problem that needs to be solved by those skilled in the art. However, the existing unmanned aerial vehicle detection method generally has the problem of low detection accuracy.

[0004] At present, there is no effective solution to the problem of low accuracy of hydrogen leakage detection in the prior art. SUMMARY

[0005] Therefore, it is necessary to provide a gas leakage detection method and system to solve the above technical problems.

[0006] In a first aspect, the present application provides a gas leakage detection method, which is applied to a collection and processing device in a gas leakage detection system, the system comprising an unmanned aerial vehicle, a sampling device, a rotating wheel device and the collection and processing device, wherein the sampling device, the rotating wheel device and the collection and processing device are fixed on the unmanned aerial vehicle; the method comprising:

[0007] The collected to-be-detected gas is detected, wherein the to-be-detected gas is a gas collected by the sampling device from the environment of the device under test when the extension length of the sampling tube of the sampling device is adjusted to a reference extension length, and the extension length of the sampling tube is a length adjusted based on the reference extension length by the rotating device in the detection system.

[0008] In one of the embodiments, the gas leakage detection system further comprises a wind speed and direction detection device, and the wind speed and direction detection device is arranged at the inlet of the sampling tube, and the method further comprises:

[0009] The rotating device is controlled based on the wind speed and direction signal to adjust the extension length of the sampling tube, wherein the wind speed and direction signal is obtained by the wind speed and direction detection device based on wind speed data and wind direction data in the environment of the system, and the wind speed and direction signal is sent to the collection and processing device by the wind speed and direction detection device.

[0010] In one of the embodiments, the above method further comprises:

[0011] When the sampling tube is at the current extension length, the current concentration of the to-be-detected gas at the current extension length is obtained, and the sampling tube is adjusted from the current extension length to a new extension length;

[0012] When the sampling tube is at the new extension length, a new concentration of the to-be-detected gas at the new extension length is obtained;

[0013] When the concentration difference between the current concentration and the new concentration is greater than a preset concentration difference threshold value, a next new extension length is obtained by adjusting the new extension length, and a new concentration at the last new extension length is obtained until the concentration difference between the last obtained new concentration and the previous new concentration is less than or equal to the concentration difference threshold value, and the new extension length corresponding to the last obtained new concentration is taken as the reference extension length.

[0014] In one of the embodiments, the maximum extension length is obtained, comprising:

[0015] If the wind speed and direction data is detected to be within a preset maximum wind speed and direction data, the maximum extension length of the sampling tube is determined based on the wind speed and direction data and the physical characteristics of the unmanned aerial vehicle system, and the extension length of the sampling tube is controlled by the rotating device to be less than or equal to the maximum extension length, wherein the wind speed and direction data is collected by the wind speed and direction detection device.

[0016] In a second aspect, the application provides a gas leakage detection system, comprising: an unmanned aerial vehicle, a sampling device, a rotating device, and a collection and processing device, wherein the sampling device, the rotating device, and the collection and processing device are fixed on the unmanned aerial vehicle;

[0017] A rotating device is connected with the sampling device, and is used to adjust the extension length of the sampling tube of the sampling device to a reference extension length.

[0018] The sampling device is used to collect the to-be-detected gas in the environment of the detected equipment when the extension length of the sampling tube is adjusted to the reference extension length, and deliver the to-be-detected gas to the collection and processing device.

[0019] The collection and processing device is used to collect and detect the to-be-detected gas.

[0020] In one of the embodiments, the system further comprises a wireless charging device and a wind speed and direction detection device, wherein the wireless charging device is fixedly connected with the unmanned aerial vehicle, and the wind speed and direction detection device is arranged at the inlet of the sampling tube.

[0021] The wind speed and direction detection device is used to detect the wind speed data and the wind direction data in the environment, obtain a wind speed and direction signal, and send the wind speed and direction signal to the collection and processing device; wherein the collection and processing device is further used to control the rotating device based on the wind speed and direction signal, so as to adjust the extension length of the sampling tube.

[0022] The wireless charging device is used to charge the wind speed and direction detection device through an output unit on the wireless charging device and a receiving unit on the wind speed and direction detection device.

[0023] In one of the embodiments, the system further comprises a linking device, which comprises a power linking unit and an unmanned aerial vehicle connecting port; wherein the power linking unit is fixedly connected with the unmanned aerial vehicle connecting port.

[0024] The unmanned aerial vehicle connecting port is used to transmit the electric energy provided by the unmanned aerial vehicle to the power linking unit.

[0025] The power linking unit is used to supply power to the wireless charging device based on the received electric energy.

[0026] The wireless charging device is used to charge the battery in the wind speed and direction detection device by using the electric energy provided by the power linking unit.

[0027] In one of the embodiments, the wind speed and direction detection device further comprises a wind speed and direction detection unit, a wind speed and direction communication unit, and a wind speed and direction processing unit.

[0028] The wind speed and direction detection unit is used to detect the wind speed and direction data of the environment.

[0029] The wind speed and direction processing unit is used to process the wind speed and direction data to obtain a wind speed and direction signal.

[0030] The wind speed and direction communication unit is used to send the wind speed and direction signal to the collection and processing device.

[0031] In one embodiment, the rotating device further includes a drive unit, a rotating wheel, and a rotating shaft; wherein the drive unit is connected to the rotating wheel via the rotating shaft, and the sampling tube is placed inside the rotating wheel;

[0032] The drive unit is used to drive the rotating wheel to rotate via the rotating shaft, thereby adjusting the extension length of the sampling tube to the reference extension length.

[0033] In one embodiment, the acquisition and processing device further includes a sampling processing unit, a gas sensor, a storage unit, a sampling pump, and a sampling communication unit; wherein the gas sensor, storage unit, sampling pump, and sampling communication unit are all fixed to a non-movable end of the sampling tube;

[0034] A sampling pump is used to deliver the gas to be detected to the gas sensor.

[0035] A gas sensor is used to detect the gas to be tested and obtain gas data;

[0036] The sampling and processing unit is also used to process gas data and obtain data processing results;

[0037] Storage unit, used to store the results of data processing;

[0038] The sampling communication unit is used to communicate with a preset communication terminal to transmit data processing results.

[0039] The aforementioned gas leak detection method and system adjust the extension length of the sampling tube in the sampling device to a reference extension length using a rotating wheel device. The system then collects the gas to be detected from the environment surrounding the device being tested through the inlet end of the sampling tube and delivers the gas to be detected to the collection and processing device for detection. This system reduces the interference of airflow generated by the UAV propellers on the collected gas, thereby improving the accuracy of the gas collection. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a structural block diagram of a gas leak detection system in one embodiment;

[0042] Figure 2 This is a schematic diagram of a gas leak detection system at a certain measurement position in one embodiment.

[0043] Figure 3Fig. 2 is a schematic diagram of a gas leak detection system in another measurement position according to one embodiment;

[0044] Figure 4 Fig. 4 is a schematic diagram of a process for determining a reference extension length according to one embodiment;

[0045] Figure 5 Fig. 5 is a schematic diagram of a process for determining a maximum extension length according to one embodiment;

[0046] Figure 6 Fig. 6 is a schematic diagram of a gas leak detection system in a certain measurement position and relative to a wind condition according to one embodiment;

[0047] Figure 7 Fig. 7 is a schematic diagram of a gas leak detection system in another measurement position and relative to a wind condition according to one embodiment;

[0048] Figure 8 Fig. 8 is a front view of a gas leak detection system according to one embodiment;

[0049] Figure 9 Fig. 9 is a left view of a gas leak detection system according to one embodiment.

[0050] The following items are used in the description of the embodiments: 11, UAV body; 12, UAV support; 13, rotor; 21, motor; 22, rotating wheel; 23, rotating shaft; 24, adjusting device; 25, shell; 31, gas sensor; 32, sampling processing unit; 33, storage unit; 34, sampling pump; 35, sampling communication unit; 41, sampling tube; 42, sampling tube inlet; 51, receiving permanent magnet component; 52, receiving coil; 53, output coil; 54, output permanent magnet component; 61, charging support; 62, UAV connection port; 63, power link unit; 71, wind speed and direction detection unit; 72, battery; 73, wind speed and direction communication unit; 74, wind speed and direction processing unit. DETAILED DESCRIPTION

[0051] In order to facilitate the understanding of the present application, a more complete description of the present application will be made with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0053] It can be understood that the terms "first", "second", and the like used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of the present application, a first resistor can be referred to as a second resistor, and similarly, a second resistor can be referred to as a first resistor. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0054] It can be understood that "connection" in the following embodiments should be understood as "electrically connected", "communicatively connected", etc. if the circuits, modules, units, etc. connected to each other have transmission of electrical signals or data.

[0055] It can be understood that "at least one" means one or more, and "multiple" means two or more. "At least part of the element" means part or all of the element.

[0056] As used herein, the singular forms "a", "an" and "the" can also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprise / comprising" or "have / having" specify the presence of the stated feature, integer, step, operation, component, part, or combination thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in the specification includes any and all combinations of the related listed items.

[0057] In one embodiment, a gas leakage detection method is provided, the method is applied to a collection processing device in a gas leakage detection system, the system includes a drone, a sampling device, a rotating wheel device and the collection processing device, wherein the drone is fixed with the sampling device, the rotating wheel device and the collection processing device; the method comprises:

[0058] detecting the collected gas to be detected, wherein the gas to be detected is collected by the sampling device from the gas in the environment of the detected equipment under the condition that the extension length of the sampling pipe of the sampling device is adjusted to the reference extension length, and the extension length of the sampling pipe is the length adjusted based on the reference extension length by the rotating wheel device in the detection system.

[0059] Specifically, the scheme in the present embodiment is applied to a collection processing device in a gas leakage detection system, the structure of the system is as shown in Figure 1 The system includes a drone 10, a sampling device 40, a rotating wheel device 20 and a collection processing device 30, wherein the drone 10 is fixed with the sampling device 40, the rotating wheel device 20 and the collection processing device 30.

[0060] The collected gas is detected by the collection and processing device 30, wherein the gas is collected by the sampling device 40 when the extension length of the sampling tube of the sampling device 40 is adjusted to the reference extension length, and the extension length of the sampling tube is adjusted by the rotating device 20 in the detection system based on the reference extension length.

[0061] The reference extension length can be an extension length preset by a skilled person according to actual needs, or can be an optimal extension length calculated by the unmanned aerial vehicle 10 based on the wind force and wind direction of the current environment, or can be an extension length obtained by changing the extension length of the sampling tube 41 multiple times by the rotating device 20 and simultaneously changing the height of the unmanned aerial vehicle 10, so that although the extension length changes, the height at the inlet 42 of the sampling tube remains unchanged, and the gas is collected at different extension lengths for gas concentration detection. When it is detected that the difference between the gas concentrations corresponding to at least two extension lengths is small, it is determined that the position is the reference extension length, which represents that the influence of the airflow generated by the propeller of the unmanned aerial vehicle on the gas collected by the extension component is small. For example, three gas concentration detections are performed, the first time is to perform one gas concentration detection when the extension length is x, at this time the gas concentration is a, the second time is to perform one gas concentration detection when the extension length is y, at this time the gas concentration is b, and the third time is to perform one gas concentration detection when the extension length is z, at this time the gas concentration is c (the height of the sampling tube for collecting gas is adjusted simultaneously to make the inlet 42 of the sampling tube have the same height). If it is detected that the concentration difference between a and b is large (greater than a preset concentration difference threshold), but the concentration difference between b and c is small (less than a preset concentration difference threshold), it is determined that y or z is the reference extension length described above, because at this time y or z is a certain distance away from the propeller of the unmanned aerial vehicle, and is less affected by the airflow brought by the propeller of the unmanned aerial vehicle. The present embodiment does not limit the acquisition of the reference extension length, and adjusting the extension length of the sampling tube 41 based on the reference extension length can ensure the safety of the gas leakage detection of the unmanned aerial vehicle 10 to a certain extent.

[0062] The collection and processing device 30 is preferably arranged at one end of the sampling tube 41 that is close to the main body of the unmanned aerial vehicle 10 and is not movable.

[0063] The concentration difference threshold can be set by a skilled person according to actual needs.

[0064] In some preferred embodiments, the unmanned aerial vehicle 10 can be a multi-rotor unmanned aerial vehicle.

[0065] The gas leakage detection system in the present application can detect various preset target gases according to actual needs, including but not limited to hydrogen, helium, ammonia, methane, fluorine, carbon monoxide and sulfur dioxide, chlorine, phosgene, diphosgene, hydrogen cyanide and various dangerous gases. The sampling pipe 41 generally has a long telescopic length. In actual application, the sampling pipe can be made of polytetrafluoroethylene pipe, rubber pipe, nylon pipe, snake skin pipe, braided pipe, PVC steel wire hose, steel wire rubber pipe, steel wire braided pipe, metal bellows, PU pipe, cloth- wrapped rubber pipe, PVC pipe, PVC synthetic pipe and other materials. In actual application, the sampling pipe 41 can be coiled and placed inside the rotating device 20, and the end of the sampling pipe 41 away from the unmanned aerial vehicle 10 body does not exceed the unmanned aerial vehicle 10 support when it is fully retracted. One end of the sampling pipe 41 is a non-movable end, which is fixed with the rotating device 20. The rotating device 20 can extend the sampling pipe 41 based on the reference extension length, so that the movable end of the sampling pipe 41 is away from the unmanned aerial vehicle propeller, thereby avoiding the influence of the airflow generated by the propeller on the gas detection result. When the extension length of the sampling pipe 41 is adjusted to the reference extension length, the movable end of the sampling pipe 41 can collect the detected gas in the environment of the detected device, and the detected gas is transported to the collection and processing device 30 through the sampling pipe 41. The collection and processing device 30 detects the detected gas, wherein the detected device is generally a device that needs to be detected for gas leakage, including but not limited to hydrogenation station, natural gas pipeline, chemical enterprise tank area, etc. The detection result of the collection and processing device 30 can detect whether there is target gas leakage in the detected gas. In some embodiments, the gas at the preset position can be collected to calculate the corresponding gas concentration field (i.e. standard concentration), and then the detected gas can be compared with the above-mentioned gas concentration field after the detected gas is collected, thereby completing the detection of the gas concentration, wherein the above-mentioned preset position is a position or area specified in advance by the relevant technical personnel according to actual needs. Figure 2 is a schematic view of the gas leakage detection system in one embodiment at a certain measurement position, Figure 3 is a schematic view of the gas leakage detection system in one embodiment at another measurement position, wherein the Figure 2 and Figure 3 It can be seen that, Figure 2 and Figure 3 the position of the rotating device in Figure 2 and Figure 3 the extension length of the sampling pipe 41 is also different, Figure 3 the extension length of the sampling pipe 41 in

[0066] In summary, in the embodiment, the sampling tube 41 is extended by the rotating wheel device 20, adjusted to the reference extension length, and the to-be-detected gas in the environment of the detected equipment is collected through the movable end of the sampling tube 41 away from the unmanned aerial vehicle 10, and the to-be-detected gas is detected through the collection and processing device 30, which ensures the gas collection and detection efficiency, and makes the movable end of the sampling tube 41 away from the propeller of the unmanned aerial vehicle, effectively reduces the influence of the airflow generated by the propeller on the gas detection, and improves the accuracy of the gas detection.

[0067] In one embodiment, the above method further comprises:

[0068] In the case that the sampling tube 41 is at the current extension length, the current concentration of the to-be-detected gas at the current extension length is obtained, and the sampling tube 41 is adjusted from the current extension length to a new extension length;

[0069] In the case that the sampling tube 41 is at the new extension length, the new concentration of the to-be-detected gas at the new extension length is obtained;

[0070] In the case that the concentration difference between the current concentration and the new concentration is greater than a preset concentration difference threshold value, the next new extension length is obtained by adjusting the new extension length, and the new concentration at the last new extension length is obtained until the concentration difference between the last obtained new concentration and the previous new concentration is less than or equal to the concentration difference threshold value, and the new extension length corresponding to the last obtained new concentration is taken as the reference extension length.

[0071] Specifically, the present application provides a method for determining a reference extension length, Figure 4 For one embodiment, a flowchart of the method for determining the reference extension length is shown.

[0072] In step S401, the position information of the unmanned aerial vehicle is determined, and it is determined whether the current position height is appropriate, whether it is in a detectable area, etc. At this time, the rotating wheel 22 in the rotating wheel device is at the initial position, that is, the inlet end 42 of the sampling tube does not exceed the unmanned aerial vehicle support 12. Further, the sampling tube inlet end is provided with a wind speed and direction detection device, which can be wirelessly charged by a wireless charging device. Specifically, the output permanent magnet part 54 and the output coil 53 provided on the wireless charging device charge the receiving permanent magnet part 51 and the receiving coil 52 installed on the wind speed and direction detection device. The output permanent magnet part 54 and the receiving permanent magnet part 51 can be fixed by magnetic force to ensure the best coupling between the output coil 53 and the receiving coil 52, and through the interaction of the magnetic field, the induced electromotive force in the receiving coil 52 can also be enhanced, thereby improving the charging efficiency.

[0073] Step S402, the rotating wheel 22 in the rotating wheel device rotates to a current position to adjust the telescopic length of the sampling tube 41, and the current extension length of the corresponding sampling tube 41 is the current extension length, wherein the current position can be a preset point. Further, since the telescopic length of the sampling tube 41 can be controlled by the rotating wheel device, and the wind speed and direction detection device is arranged at the sampling tube inlet, when the wind speed and direction detection device is wirelessly charged, if it is needed to end the charging of the wind speed and direction detection device, the telescopic length of the sampling tube 41 can be increased or decreased by the rotating wheel device, so that the magnetic force fixation between the receiving permanent magnet part 51 and the output permanent magnet part 54 is released in combination with the current wind speed and direction, the weight of each device on the unmanned aerial vehicle, the weight of the extension section of the sampling tube 41, and other factors, so as to end the charging of the wind speed and direction detection device.

[0074] Step S403, the collecting and processing device collects the gas and detects the gas concentration corresponding to the current extension length, to obtain a current concentration.

[0075] Step S404, the rotating wheel 22 in the rotating wheel device rotates to a next position to increase the extension length of the sampling tube 41, and the current extension length of the corresponding sampling tube 41 is a new extension length. Similarly, the next position can be a preset point.

[0076] Step S405, the collecting and processing device collects the gas and detects the gas concentration corresponding to the new extension length, to obtain a new concentration. It should be noted that although the new extension length is greater than the current extension length, the unmanned aerial vehicle will simultaneously increase the hovering height in this process, so that the height of the inlet 42 of the sampling tube remains unchanged.

[0077] Step S406, it is detected whether the concentration difference between the current concentration and the new concentration is less than or equal to a preset concentration difference threshold. It can be understood that the detected gas concentrations at the same height generally do not change greatly, so if the difference between the two concentrations is large, it means that the detected gas concentration is greatly affected by the airflow generated by the propeller of the unmanned aerial vehicle, and at this time, if the gas leakage detection is performed, the correctness of the detection result is low. Similarly, if the difference between the two concentrations is small, it means that the detected gas concentration is less affected by the airflow generated by the propeller of the unmanned aerial vehicle, that is, the telescopic length of the sampling tube 41 at this time is taken as the above-mentioned reference extension length, and at this time, if the gas leakage detection is performed, a more accurate detection result can be obtained. Therefore, if it is detected that the difference between the current concentration and the new concentration does not meet the preset condition, jump to step S407, and if it is detected that the difference between the current concentration and the new concentration meets the preset condition, jump to step S408.

[0078] Step S407, detecting whether the current sampling tube 41 reaches the preset maximum extension length, if not, jumping to step S404, i.e. adjusting the extension length of the sampling tube 41 to the next new extension length, and repeating the above steps until the newly acquired new concentration and the last newly acquired new concentration meet the preset condition, at this time, the new extension length corresponding to the newly acquired new concentration is taken as the reference extension length, if yes, jumping to step S408.

[0079] Step S408, performing gas sampling to acquire the to-be-detected gas in the environment where the detected device is located.

[0080] In summary, the scheme provided in the embodiment adjusts the extension length of the sampling tube 41 at least twice until the difference between the final adjacent two gas concentrations is less than the preset concentration difference threshold, or until the extension length of the sampling tube 41 reaches the preset maximum extension length. The scheme provided in the embodiment can correct the extension length of the sampling tube 41 before gas detection, so as to ensure that the sampling tube 41 is less affected by the airflow of the unmanned aerial vehicle rotor 13 / propeller during gas detection, thereby improving the accuracy of gas detection.

[0081] In one of the embodiments, acquiring the maximum extension length further includes:

[0082] If it is detected that the wind speed and direction data is within the preset maximum wind speed and direction data, the maximum extension length of the sampling tube 41 is determined based on the wind speed and direction data and the physical characteristics of the unmanned aerial vehicle system, and the extension length of the sampling tube 41 is controlled by the rotating wheel device to be less than or equal to the maximum extension length, wherein the wind speed and direction data is acquired by the wind speed and direction detection device.

[0083] Specifically, Figure 5 The flowchart for determining the maximum extension length in one of the embodiments.

[0084] Step S501, determining the location information of the unmanned aerial vehicle currently located, and judging whether the current location height is appropriate, whether it is in a detectable area, etc., at this time, the rotating wheel 22 in the rotating wheel device is in the initial position, i.e. the inlet 42 of the sampling tube does not exceed the unmanned aerial vehicle support 12.

[0085] Step S502, detecting the wind speed and direction data of the environment where the unmanned aerial vehicle is currently located.

[0086] Step S503, detecting whether the wind speed and direction data exceeds the wind requirement of the UAV, i.e. detecting whether the wind speed and direction data is within the preset maximum wind speed and direction data, if yes, jumping to step S508, if no, jumping to step S504, wherein the maximum wind speed and direction data can be a data range set by the human in advance, which represents the maximum wind speed and direction data that the UAV can move, if the wind speed and direction data under the current environment exceeds the maximum wind speed and direction data, it indicates that there will be a security risk if the UAV continues to move, and the UAV should be controlled to return.

[0087] Step S504, determining the maximum extension length of the sampling tube 41 under the current environment by the wind speed and direction data and the physical characteristics of the UAV system, and recording the maximum extension length, wherein the physical characteristics of the UAV system include but are not limited to the weight of each device, component and unit on the UAV, and the physical characteristics (such as yield strength and weight) of the sampling tube 41.

[0088] Step S505, detecting whether the extension length of the sampling tube 41 is greater than the maximum extension length, if yes, jumping to step S506, if no, jumping to step S507.

[0089] Step S506, reducing the length of the sampling tube 41 to the maximum extension length.

[0090] Step S507, detecting whether the gas leakage detection task is completed, if yes, jumping to step S508, if no, jumping to step S502.

[0091] Step S508, controlling the sampling tube 41 to return to the initial position by the rotating wheel device, and controlling the UAV to return, wherein the initial position can be set by the relevant technical personnel, and can be preferably set as the position where the output permanent magnet component 54 and the receiving permanent magnet component 51 can be magnetically fixed.

[0092] According to the embodiment, the maximum extension length can be dynamically calculated according to the wind speed and direction data under the current environment, and the extension length of the sampling tube 41 is controlled to be less than the maximum extension length throughout the process, thereby reducing the security risk.

[0093] In some embodiments, under the condition of stopping flying, the motor 21 in the rotating wheel device can be started to increase the extension length of the sampling tube 41, so that the receiving unit in the wind speed and direction detection device (i.e. the receiving unit in the wireless charging device) can directly charge the battery 72 in the wind speed and direction detection device by using the commercial power and the related wireless charging adapter.

[0094] In some embodiments, the wind speed and direction data is monitored in real time during the gas leakage detection task, and if the wind speed and direction data increases, the above-mentioned maximum extension length is also reduced. In the present embodiment, the mapping relationship between the wind speed and direction data and the maximum extension length is not limited too much, and only needs to ensure that the wind speed and direction data and the maximum extension length are inversely proportional.

[0095] In one of the embodiments, the gas leakage detection system further comprises a wind speed and direction detection device, and the wind speed and direction detection device is arranged at the inlet of the sampling pipe. The method further comprises:

[0096] The wind speed and direction detection device is arranged at the inlet of the sampling pipe, i.e. at the end of the sampling pipe 41 which is movable and away from the unmanned aerial vehicle.

[0097] Specifically, the wind speed and direction device is arranged at the inlet 42 of the sampling pipe, i.e. at the end of the sampling pipe 41 which is movable and away from the unmanned aerial vehicle.

[0098] The wind speed and direction detection device can detect the wind speed data and the wind direction data in the environment where the unmanned aerial vehicle is located, obtain the wind speed and direction signal, and send the wind speed and direction signal to the collection and processing device. The collection and processing device can calculate the safe distance of the sampling pipe 41 in the current environment according to the wind speed and direction signal, i.e. calculate the maximum extension length of the sampling pipe 41 in the current environment. It can be understood that when the wind speed is too large, the position of the sampling pipe 41 and the wind speed and direction detection device connected with the sampling pipe 41 will deviate too much, thereby affecting the safety of the unmanned aerial vehicle. Similarly, when the wind direction is from bottom to top, the risk coefficient increases, and the sampling pipe 41 and the wind speed and direction detection device will also affect the safety of the unmanned aerial vehicle. Similarly, when the unmanned aerial vehicle advances against the wind, the relative wind speed increases, and at this time the sampling pipe 41 and the wind speed and direction detection device will also affect the safety of the unmanned aerial vehicle. Therefore, the maximum extension length of the sampling pipe 41 at this time needs to be calculated according to the wind speed data and the wind direction data of the current environment. In some preferred embodiments, the above-mentioned maximum extension length can be calculated based on the wind speed data, the wind direction data, the physical properties (such as yield strength, weight, etc.) of the sampling pipe 41, and the weight of each component on the unmanned aerial vehicle. Figure 6 Fig. 2 is a schematic view of the gas leakage detection system in one embodiment in a certain measurement position and relative to the wind condition, Figure 7 Fig. 3 is a schematic view of the gas leakage detection system in another embodiment in a certain measurement position and relative to the wind condition.

[0099] The collection processing device controls the rotating wheel device to adjust the extension length of the sampling tube 41 through the rotating wheel device. If it is detected that the extension length exceeds the maximum extension length, the extension length of the sampling tube 41 is shortened through the rotating wheel system, so that the extension length is kept within the range less than the maximum extension length.

[0100] In one embodiment, a gas leakage detection system is provided, comprising: a UAV 10, a sampling device 40, a rotating wheel device 20 and a collection processing device 30, wherein the sampling device 40, the rotating wheel device 20 and the collection processing device 30 are fixed on the UAV 10;

[0101] The rotating wheel device 20 is connected with the sampling device 40, and is used to adjust the extension length of the sampling tube 41 of the sampling device 40 to a reference extension length;

[0102] The sampling device 40 is used to collect the to-be-detected gas in the environment of the detected equipment and deliver the to-be-detected gas to the collection processing device 30 when the extension length of the sampling tube 41 is adjusted to the reference extension length;

[0103] The collection processing device 30 is used to detect the to-be-detected gas.

[0104] Specifically, one end of the sampling tube 41 is a non-movable end, and the non-movable end is fixed with the rotating wheel device 20. The rotating wheel device 20 can extend the sampling tube 41 based on the reference extension length, so that the movable end of the sampling tube 41 is away from the propeller of the UAV, thereby avoiding the influence of the airflow generated by the propeller on the gas detection result. In the case that the extension length of the sampling tube 41 is adjusted to the reference extension length, the to-be-detected gas in the environment of the detected equipment can be collected based on the movable end of the sampling tube 41, and the to-be-detected gas is delivered to the collection processing device 30 through the sampling tube 41. The collection processing device 30 detects the to-be-detected gas, and the detection result of the collection processing device 30 can detect whether there is target gas leakage in the to-be-detected gas.

[0105] The reference extension length can be an extension length preset by a skilled person according to actual needs, can be an optimal extension length calculated by the unmanned aerial vehicle 10 according to wind power, wind direction and other data of the current environment, or can be an extension length obtained by changing the extension length of the sampling pipe 41 multiple times through the rotating wheel device 20 and synchronously changing the height of the unmanned aerial vehicle 10, so that although the extension length changes, the height at the inlet 42 of the sampling pipe does not change, and the gas collected at different extension lengths is detected for gas concentration detection. When it is detected that there is at least two extension lengths corresponding to the gas concentration, the difference between the gas concentrations is small, it is judged that the position is the reference extension length, which represents that the influence of the airflow generated by the propeller of the unmanned aerial vehicle on the gas collected by the extension component is small. The embodiment does not make too many limitations on the acquisition of the reference extension length, and adjusting the extension length of the sampling pipe 41 based on the reference extension length can ensure the safety of the gas leakage detection of the unmanned aerial vehicle 10 to a certain extent.

[0106] In summary, in the embodiment, the sampling pipe 41 is extended by the rotating wheel device 20 and adjusted to the reference extension length. The movable end of the sampling pipe 41 away from the unmanned aerial vehicle 10 collects the detected gas in the environment of the detected device, and the detected gas is detected by the collection and processing device 30. The efficiency of gas collection and detection is ensured, and the movable end of the sampling pipe 41 is away from the propeller of the unmanned aerial vehicle, which effectively reduces the influence of the airflow generated by the propeller on the gas detection, and improves the accuracy of the gas detection.

[0107] In one of the embodiments, the system further comprises a wireless charging device and a wind speed and direction detection device, wherein the wireless charging device is fixedly connected with the unmanned aerial vehicle, and the wind speed and direction detection device is arranged at the inlet of the sampling pipe;

[0108] The wind speed and direction detection device is used for detecting wind speed data and wind direction data in the environment to obtain a wind speed and direction signal, and sending the wind speed and direction signal to the collection and processing device. The collection and processing device is further used for controlling the rotating wheel device based on the wind speed and direction signal to adjust the extension length of the sampling pipe.

[0109] The wireless charging device is used for charging the wind speed and direction detection device through an output unit on the wireless charging device and a receiving unit on the wind speed and direction detection device.

[0110] The gas leakage detection system further comprises a wireless charging device configured to charge the wind speed and direction detection device to ensure that the wind speed and direction detection device can work normally. Since the wireless charging device is loaded on the unmanned aerial vehicle, the contact electrode of the charging device can be polluted due to the environment and other reasons such as rainwater, corrosive gas, and bird droppings. Therefore, the wind speed and direction detection device is charged by the wireless charging device in this embodiment. It can be understood that the charging interface is less affected by pollution, so the wind speed and direction detection device is charged by the wireless charging device, which can meet the use requirements.

[0111] The wind speed and direction detection device can detect the wind speed and direction data in the environment where the unmanned aerial vehicle is located, obtain the wind speed and direction signal, and send the wind speed and direction signal to the collection and processing device. The collection and processing device can calculate the safe distance of the sampling tube 41 in the current environment according to the wind speed and direction signal, that is, calculate the maximum extension length of the sampling tube 41 in the current environment. The collection and processing device controls the rotating wheel device to adjust the extension length of the sampling tube 41 through the rotating wheel device. If it is detected that the extension length exceeds the maximum extension length, the extension length of the sampling tube 41 needs to be shortened through the rotating wheel system to keep the extension length within the range of the maximum extension length.

[0112] Specifically, the output unit includes an output permanent magnet component 54 and an output coil 53, and the receiving unit includes a receiving permanent magnet component 51 and a receiving coil 52. In actual application, the receiving permanent magnet component 51 can be fixed with the output permanent magnet component 54 through magnetic force to ensure the optimal coupling between the output coil 53 and the receiving coil 52. In addition, the interaction of the magnetic field can also enhance the induced electromotive force in the receiving coil 52, thereby improving the charging efficiency. In summary, the wind speed and direction detection system can be charged by the wireless charging device.

[0113] In one embodiment, the system further comprises a linking device, which includes a power linking unit 63 and an unmanned aerial vehicle connection port 62. The power linking unit 63 is fixedly connected with the unmanned aerial vehicle connection port 62.

[0114] The unmanned aerial vehicle connection port 62 is configured to transmit the electric energy provided by the unmanned aerial vehicle to the power linking unit 63.

[0115] The power linking unit 63 is configured to supply power to the wireless charging device based on the received electric energy.

[0116] The wireless charging device is configured to charge the battery 72 in the wind speed and direction detection device by using the electric energy provided by the power linking unit 63.

[0117] Specifically, the unmanned aerial vehicle connection port 62 is used to transmit the electric energy of the unmanned aerial vehicle to the power link unit 63, and the unmanned aerial vehicle connection port 62 is preferably arranged at the unmanned aerial vehicle body 11. The power link unit 63 is used to supply power to the wireless charging device based on the received electric energy, so that the battery 72 in the wind speed and direction detection device can be charged through the wireless charging device.

[0118] In one embodiment, the wind speed and direction detection device further comprises a wind speed and direction detection unit 71, a wind speed and direction communication unit 73, and a wind speed and direction processing unit 74.

[0119] The wind speed and direction detection unit 71 is used to detect the wind speed and direction data of the environment.

[0120] The wind speed and direction processing unit 74 is used to process the wind speed and direction data to obtain a wind speed and direction signal.

[0121] The wind speed and direction communication unit 73 is used to send the wind speed and direction signal to the collection and processing device.

[0122] Specifically, the wind speed and direction detection device is preferably arranged at the end of the sampling pipe 41 which is movable and away from the unmanned aerial vehicle body 11. The wind speed and direction detection unit 71 is used to collect the wind speed and direction data of the current environment, and the wind speed and direction detection unit 71 includes but is not limited to an anemometer, a wind direction meter, etc. The wind speed and direction processing unit 74 can be an MCU (Microcontroller Unit), a CPU (Central Processing Unit), or an analog-to-digital conversion unit in actual application, and the functions of the wind speed and direction processing unit 74 include but are not limited to analog-to-digital conversion of the wind speed and direction data to obtain a wind speed and direction signal. The wind speed and direction communication unit 73 communicates wirelessly with the collection and processing device, and the wind speed and direction data is sent to the collection and processing device through the wind speed and direction communication unit 73 for the collection and processing device to calculate the maximum extension length corresponding to the current environment. In actual application, the wireless communication includes but is not limited to Bluetooth wireless communication, Wi-Fi wireless communication, radio wave wireless communication, mobile wireless communication, Zigbee / Z-Wave wireless communication, etc.

[0123] In one embodiment, the rotating wheel device further comprises a driving unit, a rotating wheel 22, and a rotating shaft 23. The driving unit is connected to the rotating wheel 22 through the rotating shaft 23, and the sampling pipe 41 is placed inside the rotating wheel 22.

[0124] The driving unit is used to drive the rotating wheel 22 to rotate through the rotating shaft 23, so as to adjust the extension length of the sampling pipe 41 to the reference extension length.

[0125] Specifically, the driving unit can be set as a stepper motor, a servo motor, a motor with an encoder, or the like, and can also include the motor 21 and the adjusting device 24 (such as an encoder, a limit switch, an angle sensor, or the like). If the adjusting device 24 is included in the driving unit, the position of the sampling inlet 42 of the sampling tube can be changed by the adjusting device 24 through extension or coiling. At this time, the motor 21 can serve as a power source. After the rotating wheel device is opened, the driving unit drives the rotating wheel 22 to rotate, start or stop, and change direction through the rotating shaft 23, so that the extension length of the sampling tube 41 is changed. The above process needs to ensure that there is enough safety space below the unmanned aerial vehicle, otherwise the extended sampling tube 41 may be wound around the obstacle below, thereby causing a safety hazard. Therefore, the hovering height of the unmanned aerial vehicle can be increased before the sampling tube 41 is extended, so as to ensure enough safety space.

[0126] In summary, the rotating wheel device can adjust the extension length of the sampling tube 41. The movable end of the sampling tube 41 is provided with a wind speed and direction detection device, and the wind speed and direction detection device is wirelessly charged by the wireless charging device fixed on the unmanned aerial vehicle. Therefore, the start and end of the charging process of the wind speed and direction detection device can be controlled by the operation of the rotating wheel device. For example, in the case that the receiving permanent magnet part 51 and the output permanent magnet part 54 are magnetically fixed in the wireless charging device, that is, in the case of wirelessly charging the wind speed and direction detection device, if it is needed to end the charging of the wind speed and direction detection device, the extension length of the sampling tube 41 can be increased or decreased by the rotating wheel device, so that the receiving permanent magnet part 51 and the output permanent magnet part 54 are separated from the magnetic fixation in combination with the current wind speed and direction, the weight of each device on the unmanned aerial vehicle, the weight of the extended section of the sampling tube 41, and other factors, so as to end the charging of the wind speed and direction detection device.

[0127] In one embodiment, the collection and processing device further includes a gas sensor 31, a storage unit 33, a sampling pump 34, and a sampling communication unit 35. The gas sensor 31, the storage unit 33, the sampling pump 34, and the sampling communication unit 35 are all fixed at the end of the sampling tube 41 that is not movable.

[0128] The sampling pump 34 is configured to deliver the to-be-detected gas to the gas sensor 31.

[0129] The gas sensor 31 is configured to detect the to-be-detected gas to obtain gas data.

[0130] The sampling processing unit 32 is further configured to perform data processing on the gas data to obtain a data processing result.

[0131] The storage unit 33 is configured to store the data processing result.

[0132] The sampling communication unit 35 is used for communication with a preset communication terminal to transmit the data processing result.

[0133] Specifically, the collection and processing device is arranged on the unmanned aerial vehicle body 11 at the non-movable end of the sampling pipe 41. After the sampling pump 34 is turned on, the gas enters the sampling pipe from the inlet end 42 (i.e., the movable end of the sampling pipe 41 away from the unmanned aerial vehicle body 11). The sampling pipe inlet end 42 can be provided with a filtering device to protect the collection and processing device. In addition, a filtering device can also be arranged on the pipeline of the sampling pipe 41. The filtering material includes but is not limited to filter cotton, biochemical cotton, fiber ball sintered metal, non-woven material, filter cloth, filter screen, filter paper, etc. The gas sensor 31 is used for detecting the collected gas to be detected to obtain gas data. The gas data can reflect various data, including but not limited to which types of gas are included in the gas to be detected, the content of each type of gas, etc. In actual application, the gas sensor 31 can include various sensors, such as high-precision hydrogen sensors, methane sensors, etc. The required gas sensor 31 can be selected according to actual needs. Then, the sampling processing unit 32 performs digital-to-analog conversion and other processing according to the above-mentioned gas data, and judges whether the device to be detected exists gas leakage according to the gas data, so as to obtain the data processing result. The storage unit 33 can store the data processing result, and can also be used to store the required computer program. The above-mentioned data processing result can also be communicated with a preset communication terminal through the sampling communication unit 35 to feed back the data processing result. The above-mentioned unmanned aerial vehicle connection port 62 can also be used for communication with a preset communication terminal on the ground. It should be emphasized that the above-mentioned unmanned aerial vehicle connection port 62 can be an E-Port, PWM, PPM, SBUS, serial port, SPI, I2C, CAN, etc. In addition, the port can also provide power supply for the mounted wind speed and direction detection device.

[0134] In some embodiments, the gas leakage detection system in the present application can also be provided with one or more of an infrared sensing system, a night vision camera, an infrared camera, a positioning system, and a wireless communication system according to actual needs.

[0135] In some embodiments, all the above-mentioned communication units can also communicate in an effective form.

[0136] The present application also provides a preferred embodiment of a gas leakage detection system, Figure 8 and Figure 9 is a structural schematic diagram of the gas leakage detection system in a preferred embodiment, Figure 8 is a front view of the gas leakage detection system, Figure 9 is a left view of the gas leakage detection system, and Figure 9Fig. 1 is a schematic diagram of the sampling tube 41 of the gas leakage detection system in the initial position (i.e. the position where the output permanent magnet 54 and the receiving permanent magnet 51 can be magnetically fixed).

[0137] In the figure, the unmanned aerial vehicle includes an unmanned aerial vehicle body 11, an unmanned aerial vehicle support 12, and rotors 13, wherein the rotors 13 can be provided with four rotors. The rotating wheel device further includes a motor 21, a rotating wheel 22, a rotating shaft 23, an adjusting device 24, and a shell 25, wherein the motor 21 can drive the adjusting device 24 and the rotating wheel 22 through the rotating shaft 23, so that the extension length of the sampling tube 41 is lengthened, and in a preferred embodiment, the motor 21 and the adjusting device 24 can be combined into a motor 21 with an adjusting device 24. The above-mentioned shell 25 is the shell 25 outside the rotating wheel 22, and the sampling tube 41 is coiled and placed in the rotating wheel 22. The above-mentioned gas sensor 31, sampling processing unit 32, storage unit 33, sampling pump 34, and sampling communication unit 35 are fixed on the unmanned aerial vehicle close to the non-movable end of the sampling tube 41, the sampling pump 34 is used to deliver the gas to be detected to the gas sensor 31, the gas sensor 31 is used to detect the gas to be detected to obtain gas data, the sampling processing unit 32 is used to process the gas data to obtain a data processing result, the storage unit 33 is used to store the data processing result, and the sampling communication unit 35 is used to send the data processing result to a preset communication end. The above-mentioned sampling tube 41 is preferably provided as a sampling tube, and the sampling tube inlet 42 is the movable end of the sampling tube 41 away from the unmanned aerial vehicle body 11. The above-mentioned receiving permanent magnet 51 and receiving coil 52 are fixed on the wind speed and direction detection device, the above-mentioned output permanent magnet 54 and output coil 53 are fixed at the wireless charging device, and the above-mentioned receiving permanent magnet 51, receiving coil 52, output permanent magnet 54, and output coil 53 jointly constitute the wireless charging device. The above-mentioned charging support 61 supports and fixes the output permanent magnet 54 and the output coil 53, the unmanned aerial vehicle connection port 62 is arranged on the unmanned aerial vehicle body 11, and is used to transmit the electric energy of the unmanned aerial vehicle to the power link power supply. The power link power supply is fixed on the unmanned aerial vehicle body 11, and is used to supply power to the wireless charging device based on the received electric energy, so that the wireless charging device can charge the wind speed and direction detection device. The above-mentioned wind speed and direction detection unit 71, battery 72, wind speed and direction communication unit 73, and wind speed and direction processing unit 74 are arranged on the unmanned aerial vehicle close to the movable end of the sampling tube 41. The wind speed and direction detection unit 71 at least includes an anemometer and a wind vane, and other detection units can also be arranged according to actual needs. The wind speed and direction processing unit 74 is used to process the wind speed and direction data detected by the wind speed and direction detection unit 71 to obtain a wind speed and direction signal, and the wind speed and direction communication unit 73 is used to send the wind speed and direction signal to the collection and processing device.

[0138] To sum up, the application can effectively reduce the interference of the unmanned aerial vehicle rotor 13 on the collected gas by collecting the to-be-detected gas through the sampling pipe 41 away from the entrance 42 of the unmanned aerial vehicle main body 11, and the application can ensure the normal work of the wind speed and direction detection device externally hung on the unmanned aerial vehicle by wirelessly charging the wind speed and direction detection device through the wireless charging device, and can also reduce the influence of rain, bird droppings and other impurities in the air on the charging interface.

[0139] In some embodiments, the wind speed and direction data are also monitored in real time during the gas leakage detection task, and if the wind speed and direction data increase, the above-mentioned maximum extension length also decreases accordingly. In the present embodiment, the mapping relationship between the wind speed and direction data and the maximum extension length is not limited too much, and only needs to ensure that the wind speed and direction data and the maximum extension length are inversely proportional.

[0140] In the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above-mentioned terms does not necessarily refer to the same embodiment or example.

[0141] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0142] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for detecting gas leaks, characterized in that, The method is applied to a data acquisition and processing device in a gas leak detection system. The system includes a drone, a sampling device, a rotating wheel device, and the data acquisition and processing device, wherein the sampling device, the rotating wheel device, and the data acquisition and processing device are fixed on the drone. The method includes: The collected gas to be detected is detected, wherein the gas to be detected is the gas collected by the sampling device from the environment of the device being detected when the extension length of the sampling tube of the sampling device is adjusted to a reference extension length, and the extension length of the sampling tube is the length adjusted based on the reference extension length by the rotating device in the detection system.

2. The method according to claim 1, characterized in that, The gas leak detection system also includes a wind speed and direction detection device, and the wind speed and direction detection device is installed at the inlet of the sampling tube. The method also includes: The rotating device is controlled based on the wind speed and direction signal to adjust the extension length of the sampling tube. The wind speed and direction signal is obtained by the wind speed and direction detection device based on the wind speed and direction data in the environment where the system is located, and the wind speed and direction signal is sent to the acquisition and processing device through the wind speed and direction detection device.

3. The method according to claim 1, characterized in that, The method further includes: With the sampling tube at its current extension length, the current concentration of the gas to be detected at the current extension length is obtained, and the sampling tube is adjusted from the current extension length to a new extension length; With the sampling tube at the new extension length, obtain the new concentration of the gas to be detected at the new extension length; If the concentration difference between the current concentration and the new concentration is greater than the preset concentration difference threshold, the new extension length is adjusted to obtain the next new extension length, and the new concentration under the most recent new extension length is obtained until the concentration difference between the most recently obtained new concentration and the previous new concentration is less than or equal to the concentration difference threshold, and the new extension length corresponding to the most recently obtained new concentration is used as the reference extension length.

4. The method according to claim 3, characterized in that, Obtaining the maximum extension length includes: If the wind speed and direction data are detected to be within the preset maximum wind speed and direction data, then based on the wind speed and direction data and the physical characteristics of the UAV system, the maximum extension length of the sampling tube is determined, and the extension length of the sampling tube is controlled to be less than or equal to the maximum extension length by the rotating wheel device, wherein the wind speed and direction data is collected by the wind speed and direction detection device.

5. A gas leak detection system, characterized in that, include: The drone, sampling device, rotating wheel device, and data acquisition and processing device are provided, wherein the sampling device, rotating wheel device, and data acquisition and processing device are fixed on the drone. The rotating wheel device is connected to the sampling device and is used to adjust the extension length of the sampling tube of the sampling device to a reference extension length; The sampling device is used to collect the gas to be detected in the environment where the device being tested is located, and to deliver the gas to be detected to the collection and processing device when the extension length of the sampling tube is adjusted to the reference extension length. The acquisition and processing device is used to acquire and detect the gas to be detected.

6. The system according to claim 5, characterized in that, The system also includes a wireless charging device and a wind speed and direction detection device, wherein the wireless charging device is fixedly connected to the drone, and the wind speed and direction detection device is set at the inlet of the sampling tube; The wind speed and direction detection device is used to detect wind speed and direction data in the environment, obtain wind speed and direction signals, and send the wind speed and direction signals to the acquisition and processing device; wherein, the acquisition and processing device is also used to control the rotating device based on the wind speed and direction signals to adjust the extension length of the sampling tube. The wireless charging device is used to charge the wind speed and direction detection device through the output unit on the wireless charging device and the receiving unit on the wind speed and direction detection device.

7. The system according to claim 6, characterized in that, The system also includes a linking device, which includes a power linking unit and a drone connection port; wherein the power linking unit is fixedly connected to the drone connection port. The drone connection port is used to transmit the power supplied by the drone to the power link unit; The power connection unit is used to supply power to the wireless charging device based on the received electrical energy. The wireless charging device is used to charge the battery in the wind speed and direction detection device using the electrical energy provided by the power link unit.

8. The system according to claim 6, characterized in that, The wind speed and direction detection device also includes a wind speed and direction detection unit, a wind speed and direction communication unit, and a wind speed and direction processing unit. The wind speed and direction detection unit is used to detect the wind speed and direction data of the environment; The wind speed and direction processing unit is used to process the wind speed and direction data to obtain wind speed and direction signals; The wind speed and direction communication unit is used to send the wind speed and direction signals to the acquisition and processing device.

9. The system according to claim 5, characterized in that, The rotating device further includes a drive unit, a rotating wheel, and a rotating shaft; wherein the drive unit is connected to the rotating wheel via the rotating shaft, and the sampling tube is placed inside the rotating wheel; The drive unit is used to drive the rotating wheel to rotate via the rotating shaft, thereby adjusting the extension length of the sampling tube to the reference extension length.

10. The system according to claim 5, characterized in that, The data acquisition and processing device further includes a sampling processing unit, a gas sensor, a storage unit, a sampling pump, and a sampling communication unit; wherein the gas sensor, the storage unit, the sampling pump, and the sampling communication unit are all fixed to one immovable end of the sampling tube; The sampling pump is used to deliver the gas to be detected to the gas sensor; The gas sensor is used to detect the gas to be detected and obtain gas data; The sampling and processing unit is also used to process the gas data to obtain data processing results; The storage unit is used to store the data processing results; The sampling communication unit is used to communicate with a preset communication terminal to transmit the data processing results.

Images