Gas leakage monitoring method and mobile gas leakage monitoring equipment and system

Abstract

The invention relates to the technical field of gas leakage monitoring, discloses a gas leakage monitoring method and a mobile gas leakage monitoring device and system, and aims to solve the problems that after a gas leakage accident occurs, the gas leakage concentration in a region cannot be monitored quickly, and differential alarm can not be given at present. The method comprises the following steps: respectively detecting and acquiring gas leakage concentration information of deployment positions; the equipment with the maximum gas leakage concentration is recognized through pairwise multi-time iterative comparison and serves as main node equipment; acquiring gas leakage concentration information in a set area, and determining alarm grade information; and each gas leakage monitoring device carries out alarm action according to the received alarm level information and carries out on-site linkage alarm. According to the invention, the gas concentration of the fault gas well accessory monitoring point can be rapidly measured, and cloud picture linkage on-site alarm is carried out through differential alarm modes of on-site arranged equipment, so that on-site first-aid repair is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of gas leakage monitoring, and particularly to a gas leakage monitoring method, a mobile gas leakage monitoring device and a system. Background Art

[0002] With the continuous development of urbanization, the mileage of urban gas pipelines is increasing, and the probability of gas leakage accidents is gradually increasing. Gas leakage is the main cause of gas explosion accidents. How to effectively monitor gas leakage is an important measure to ensure the safe and stable operation of gas pipelines. Currently, gas companies mainly monitor gas pipeline leakage through means such as daily inspections and installing leakage monitoring devices at fixed points in manholes. After a gas leakage accident occurs, there is no effective monitoring means for monitoring the gas leakage concentration at the emergency repair site, especially for the concentration monitoring of other municipal manholes. After a gas leakage accident occurs, the gas concentration will diffuse to other municipal manholes through underground pipelines, resulting in gas concentration in other municipal manholes near the leakage point. When the concentration reaches a certain value, there is a risk of explosion, bringing serious safety problems. Summary of the Invention

[0003] This specification provides a gas leakage monitoring method, a mobile gas leakage monitoring device and a system, which are used to solve the problems that after a gas leakage accident occurs, it is impossible to quickly monitor the gas leakage concentration in the area and the current differential alarm.

[0004] On the one hand, the present invention proposes a gas leakage monitoring method, which is based on multiple gas leakage monitoring devices with communication functions in a set area, and includes the following steps:

[0005] Step S10, the gas leakage monitoring devices respectively detect and obtain the gas leakage concentration information at the deployed positions;

[0006] Step S20, adjacent gas leakage monitoring devices are selected one by one for pairwise comparison. In each round, the device with the larger gas leakage concentration is retained for subsequent comparison until the device with the largest gas leakage concentration is determined, and this device is used as the master node device; the adjacent gas leakage monitoring devices communicate with each other through a near-field communication module;

[0007] Step S30, the master node device obtains the gas leakage concentration information detected by each gas leakage monitoring device, determines the alarm level information corresponding to each gas leakage monitoring device according to this information, and sends it to the corresponding gas leakage monitoring device;

[0008] Step S40, each gas leakage monitoring device performs an alarm action according to the received alarm level information to perform on-site linkage alarm.

[0009] Preferably, after step S40, the following steps are further included:

[0010] The master node device sends the gas leakage concentration information detected by each gas leakage monitoring device and the alarm level information to the host computer management system;

[0011] The host computer constructs and displays a gas leakage cloud map based on the gas leakage concentration information and the alarm level information detected by each gas leakage monitoring device received.

[0012] Preferably, the method for determining the alarm level information in step S40 is as follows:

[0013] Preset the mapping relationship between gas concentration and alarm level; or

[0014] According to the total gas leakage concentration information obtained by the master node device, generate the alarm level information of each gas leakage monitoring device according to the preset number of level levels and the proportion of each level.

[0015] Preferably, the alarm level information includes two pieces of information, a and b, where a represents the alarm level and b represents the ranking of the device based on the concentration value within this level.

[0016] Preferably, the alarm actions of the gas leakage monitoring device include light alarm and / or sound alarm;

[0017] The light alarm performs differential color alarms according to the alarm level information;

[0018] The sound alarm performs differential frequency and / or differential sound type alarms according to the alarm level information.

[0019] Preferably, for the light alarms of the same level, differential color depth alarms are performed according to the sorting information of b in the alarm level information.

[0020] On the other hand, the present invention proposes a mobile gas leakage monitoring device for the above gas leakage monitoring method, which includes a gas sensor, a main control module, a power supply module, a housing, and further includes an alarm module, a communication module, and a storage module;

[0021] The alarm module includes a light alarm device and / or a sound alarm device;

[0022] The communication module includes a remote communication module and a near-field communication module; the remote communication module is used for information communication with the host computer management system; the near-field communication module is used for information communication with other mobile gas leakage monitoring devices within a set area;

[0023] The storage module is used for storing the detection data of the gas sensor and the interaction data between gas leakage monitoring devices.

[0024] Preferably, the light alarm device can display multiple colors and various shades of colors.

[0025] The sound alarm device can output different frequencies and / or different types of sounds.

[0026] Preferably, the housing is in a conical barrel structure or a telescopic cylinder structure.

[0027] In a third aspect of the present invention, a mobile gas leakage monitoring system is proposed, which includes a plurality of the above-mentioned mobile gas leakage monitoring devices and a host computer management system within a set area.

[0028] The mobile gas leakage monitoring devices are arranged at monitoring points, and the distance between adjacent mobile gas leakage monitoring devices is less than the set near-field communication distance.

[0029] When the distance between adjacent detection points is greater than the set near-field communication distance, a mobile gas leakage monitoring device is added between the two monitoring points as a near-field communication relay.

[0030] The host computer management system obtains the monitoring information of all mobile gas leakage monitoring devices within the set area, obtains the alarm level information of each mobile gas leakage monitoring device based on a preset rule, and generates a gas leakage cloud map.

[0031] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:

[0032] Through the rapid deployment of the gas leakage monitoring device at the gas leakage repair site, the gas concentration at the monitoring points near the faulty gas well can be quickly measured, the gas concentration cloud map information can be obtained, and through the differential alarm method of the devices deployed on-site, cloud map linkage on-site alarm can be carried out; the data can also be transmitted back to the remote host computer management platform to ensure that in the case of emergency repair, the on-site gas concentration distribution can be quickly and accurately grasped, providing data support for on-site repair and decision-making, and at the same time playing a warning and reminder role for on-site personnel to ensure the safety of people's lives and property. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments and descriptions thereof are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0034] Figure 1 It is a schematic diagram of the framework of the mobile gas leakage monitoring device provided by an embodiment of this specification;

[0035] Figure 2 It is a schematic diagram of the process flow of the gas leakage monitoring method provided by an embodiment of this specification. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Apparently, the described embodiments are only a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0037] The following will, with reference to the drawings, elaborate on the technical solutions provided by each embodiment of the present application.

[0038] To make the description of the technical solutions clearer, the embodiments will be described in the order of mobile gas leakage monitoring devices, mobile gas leakage monitoring systems, and gas leakage monitoring methods. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other

[0039] An embodiment of a mobile gas leakage monitoring device proposed by the present invention is as follows Figure 1 shown, including a gas sensor 4, a main control module 1, a power supply module 7, a housing 9, and further including an alarm module, a communication module, and a storage module 2.

[0040] The gas sensor 4 is used to detect the gas content in the air; the main control module 1 is used to control the operation of peripheral resources and provide data analysis and processing functions; the power supply module 7 is used to supply power to the entire device; the housing 9 is an external protection structure of the mobile gas leakage monitoring device.

[0041] The alarm module includes a light alarm device 3 and a sound alarm device 8 (in other embodiments, one of them can also be selected). The light alarm device 3 can display various colors and various shades of colors, and is used to give a light alarm prompt when gas leakage is detected. The light alarm module can emit multiple colors such as red, orange, and yellow. Different light colors represent different alarm levels (the sound alarm device 8 can output different frequencies and / or different sound types, and is used to give a sound alarm prompt when gas leakage is detected. The volume, frequency, content, and type of the alarm prompt can be set according to user needs. Different sound alarm prompts identify different alarm levels. Here, the alarm level can also be the gas concentration level, and the content it represents is the same).

[0042] In this embodiment, the lighting alarm device can not only display multiple colors, but also display various shades of colors. Multicolor lights (such as RGB LEDs) can be used. By controlling the brightness ratio of the three colors of red, green, and blue, multiple colors can be mixed. Alternatively, multiple monochromatic lights can be used to display different colors. When using multicolor lights, by controlling the brightness ratio of the three colors of red, green, and blue, the adjustment of color shades within a certain type of color can be achieved. Or, instead of adjusting color shades, the change in brightness under a certain type of color can be achieved through current control, PWM control, etc. When using multiple monochromatic lights, current control, PWM control, etc. are generally used to achieve this. For example, by changing the magnitude of the current flowing through the LED light, the brightness of the LED light can be changed. The larger the current, the higher the brightness; the smaller the current, the lower the brightness.

[0043] Traditional alarm methods are often relatively single, perhaps only having one of sound alarms or lighting alarms, and the alarm prompts and colors are usually relatively fixed. However, through diversified settings, this device makes the alarm method more intuitive and accurate, which helps users quickly identify gas leakage situations and take corresponding countermeasures. At the same time, after obtaining the gas leakage concentration information detected by each gas leakage monitoring device within the set area and obtaining the alarm level information of each device according to the preset rules, it is equivalent to obtaining the data information for constructing a cloud map. However, for on-site personnel, they cannot see the cloud map information and generally rely on the remote command of the command center. In case of an emergency, the lack of flexibility and mobility for on-site rescue is not conducive to the development of on-site rescue work. Through the differential display of the alarm level status of the device, the on-site connection between the cloud map and the on-site alarm is realized, which is more conducive to the rescue personnel to carry out flexible and mobile rescue work under the overall command.

[0044] The communication module includes a first communication module 5 and a second communication module 6; the first communication module 5 is a remote communication module, and the second communication module 6 is a near-field communication module. The remote communication module is used for information communication with the upper computer management system and can use communication methods such as 5G, 4G, NB, etc. to ensure a stable connection with the backend server; the near-field communication module is used for information communication with other mobile gas leakage monitoring devices within the set area and can use communication methods such as Bluetooth, WIFI, etc. to facilitate information interaction between multiple on-site devices.

[0045] Traditional gas leakage monitoring devices often only have a single communication method, either only capable of remote communication or only capable of near-field communication. The dual communication module design of this device not only ensures the real-time nature of remote monitoring but also facilitates the collaborative work between on-site devices, improving the monitoring efficiency and flexibility. At the same time, in an environment with poor remote communication, near-field communication can also be used to display the alarm status of the cloud map linkage field alarm in the emergency rescue scenario, avoiding system paralysis caused by poor remote communication capabilities.

[0046] A storage module for storing gas sensor detection data, interaction data between gas leakage monitoring devices, power information, configuration information, etc.

[0047] For the monitoring and emergency rescue at the gas leakage site, there is a certain degree of urgency and danger, which requires the mobile gas leakage monitoring device to be convenient and fast to deploy, and relatively eye-catching after placement. In this embodiment, the design of the outer shell adopts a cone structure or a retractable column structure, with a height generally about half a meter, and its outer surface is generally provided with eye-catching reflective strips or light strips. The retractable main body structure can be a retractable cylinder, cone, quadrilateral column, quadrilateral cone, etc.

[0048] An embodiment of a mobile gas leakage monitoring system proposed by the present invention includes a plurality of mobile gas leakage monitoring devices in the above embodiments deployed in a set area, and a host computer management system.

[0049] The mobile gas leakage monitoring device is set at the monitoring point, and the distance between adjacent mobile gas leakage monitoring devices is less than the set near-field communication distance.

[0050] When the distance between adjacent detection points is greater than the set near-field communication distance, a mobile gas leakage monitoring device is added between the two monitoring points as a near-field communication relay. Of course, data transmission between two mobile gas leakage monitoring devices can also be achieved by using a separate network relay device. The network relay device can be fixed or a drone can be used for high-altitude relay to reduce obstacle occlusion and improve communication quality.

[0051] The host computer management system obtains the monitoring information of all mobile gas leakage monitoring devices in the set area, obtains the alarm level information of each mobile gas leakage monitoring device based on preset rules, and generates a gas leakage cloud map to facilitate remotely and real-time grasping the on-site situation and giving reasonable disposal suggestions and instructions.

[0052] On-site duty personnel quickly judge the overall situation of the gas emergency repair site and the leakage diffusion situation according to the suggestions and instructions of remote personnel, combined with the alarm colors and alarm audio frequencies of each gas terminal device, so as to take corresponding control measures to ensure that gas accidents are quickly and effectively disposed of.

[0053] A gas leakage monitoring method proposed by the present invention is based on a plurality of the above-mentioned mobile gas leakage monitoring devices deployed within a set area, such as Figure 2 As shown, the specific method may include the following steps:

[0054] Step S10, the gas leakage monitoring devices respectively detect and obtain the gas leakage concentration information at the deployed positions.

[0055] When a gas leakage occurs, place the mobile gas leakage monitoring device on the manhole covers of other municipal manholes that are not gas-related, and detect the gas concentration in the municipal manhole through the ventilation holes of the manhole cover. Generally, gas leakage detection devices are installed in municipal manholes related to gas, and the objects of temporary deployment are basically the manhole covers of other municipal manholes that are not gas-related.

[0056] Step S20, select adjacent gas leakage monitoring devices in turn for pairwise comparison. In each round, retain the device with a larger gas leakage concentration to enter the subsequent comparison until the device with the largest gas leakage concentration is determined, and use this device as the main node device; adjacent gas leakage monitoring devices communicate with each other through a near-field communication module.

[0057] In this embodiment, the pairwise comparison method of the nearest devices is used for grouped comparison. Of course, other grouped comparison methods can also be used. Using pairwise comparison instead of centralized comparison greatly reduces the dependence on hardware performance and also reduces the cost of hardware devices. At the same time, it also has great advantages in terms of rapid response, reducing the burden on the upper computer, and improving system reliability. In terms of rapid response, the pairwise comparison method allows the device to make a preliminary judgment quickly on-site without waiting for all data to be uploaded to the upper computer management platform for unified analysis. This helps to shorten the response time, which is particularly important for emergencies such as gas leakage; in terms of reducing the burden on the upper computer, if the monitoring data of all devices are directly uploaded to the upper computer management platform or a certain mobile gas leakage monitoring device, the amount of data to be processed will be very large, which may increase the processing delay and the risk of errors. Pairwise comparison can perform preliminary screening at the device level, reducing the amount of data uploaded, thereby reducing the burden on the upper computer; in terms of improving system reliability, the pairwise comparison method can reduce the dependence on a single device to a certain extent. Even if a device fails or the data is abnormal, it will not affect the judgment of the entire system. If relying on the upper computer management platform for unified judgment, once the platform has problems, it may affect the normal operation of the entire monitoring system.

[0058] In some specific embodiments, due to various reasons, there may be gas leakage monitoring devices that cannot be paired in pairs during the grouped comparison process (for example, an odd number of gas leakage monitoring devices, or other reasons). When this situation occurs, this device is postponed to the next round of comparison.

[0059] Gas leakage monitoring devices are usually deployed in complex and changeable on-site environments. The pairwise comparison method can better adapt to these environments. It does not need to rely on a stable network connection or a high-performance host management platform, but can make quick and accurate judgments at the device level.

[0060] Through each group comparison, the device with the highest gas leakage concentration in each group is used as the object for the next group comparison. It is judged whether the total number of objects for group comparison is greater than 1. If it is greater than 1, another group comparison is carried out. In this embodiment, pairwise comparison is adopted. Through such an iterative method, the device with the highest monitored natural gas concentration among all deployed mobile gas leakage monitoring devices can be quickly obtained. This device is the key monitoring object and is used as the master node device.

[0061] Step S30, the master node device obtains the gas leakage concentration information detected by each gas leakage monitoring device, determines the alarm level information corresponding to each gas leakage monitoring device according to this information, and sends it to the corresponding gas leakage monitoring device.

[0062] Taking the device with the highest detected gas leakage concentration as the master device, the gas leakage concentration information detected by each gas leakage monitoring device within the set area is obtained, which greatly reduces the risk of master device information loss in remote information interaction.

[0063] The preset rule of this embodiment is: preset the mapping relationship between gas concentration and alarm level; or according to the full amount of gas leakage concentration information obtained by the master node device, generate the alarm level information of each gas leakage monitoring device according to the preset number of level levels and the proportion of each level.

[0064] For example, it is divided into three alarm levels according to the concentration data from large to small: greater than or equal to 25% is level 1, between 15% - 25% is level 2, and between 5% - 15% (including 15%) is level 3. Each level corresponds to a color of the light alarm device. This rule can be used for each mobile gas leakage monitoring device to make a separate judgment for prior alarm display, or wait for the master node device to identify the data fed back by each gas leakage monitoring device within the set area and then separately send the alarm level information for alarm display. If it is the former, a basic color alarm display is first carried out, and after receiving the alarm level information sent back by the master node device, the depth of the light alarm color is adjusted. If it is the latter, the device display of color and depth is directly carried out according to the returned alarm level information. The method of the sound alarm device is similar, and the difference lies in the difference in alarm output types, such as different frequencies, different sound types, etc., which will not be described in detail here.

[0065] The alarm level information includes two pieces of information, a and b, which are generally represented in the form of [a, b]. Here, a represents the alarm level, and b represents the ranking of the device within this level based on the concentration value. The ranking is generally in ascending order. For example, if there are 10 devices in a level and this device ranks 2nd, it is represented as 2 / 10. Then its brightness information is controlled according to the percentage of this value. Of course, it can also be simply represented in several set sub-levels. For example, for 10 items, the first 1 / 3, the middle 1 / 3, and the last 1 / 3 are respectively displayed with three color depths.

[0066] For example, the alarm light of a gas leakage monitoring device with a value exceeding 25% LEL lights red, and the higher the concentration, that is, the higher the ranking within this level, the deeper the color. At the same time, it emits an alarm at the first frequency. The alarm light of a gas concentration monitoring device with a value exceeding 15% LEL lights orange, and the higher the concentration, that is, the higher the ranking within this level, the deeper the color. The alarm light of a gas concentration monitoring device with a value exceeding 5% LEL lights yellow, and the higher the concentration, that is, the higher the ranking within this level, the deeper the color.

[0067] In this actual situation, it also includes the step of the upper computer management system obtaining information from the main node device. The main node device uploads the gas leakage concentration information detected by each gas leakage monitoring device within the set area, and feeds back the alarm level information according to the preset rules. The upper computer management system constructs a gas leakage cloud map and displays it to ensure that in the case of emergency repair, the remote command center can quickly and accurately grasp the on-site gas concentration distribution, provide data support for on-site repair and decision-making, and at the same time play a warning and reminder role for on-site personnel.

[0068] Step S50, each gas leakage monitoring device performs an alarm action according to the received alarm level information to perform on-site linkage alarm.

[0069] Alarm actions in different states make the alarm method more intuitive and accurate, helping users quickly identify gas leakage situations and take corresponding countermeasures. After obtaining the gas leakage concentration information detected by each gas leakage monitoring device within the set area and obtaining the alarm level information of each device according to the preset rules, it is equivalent to obtaining the data information for constructing the cloud map. However, for on-site personnel, they cannot see the cloud map information and generally rely on the remote command of the command center. In case of emergency, it lacks the flexibility and mobility of on-site rescue, which is not conducive to the development of on-site rescue work. Through the differential display of the alarm level status of the device, the on-site linkage alarm of the cloud map is realized, which is more conducive to the rescue personnel to carry out flexible rescue work under the overall command.

[0070] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A gas leakage monitoring method, based on multiple gas leakage monitoring devices with communication functions within a set area, characterized in that, It includes the following steps: Step S10, the gas leakage monitoring device respectively detects and obtains the gas leakage concentration information at the deployed location; Step S20, select adjacent gas leakage monitoring devices pairwise in rounds. In each round, retain the device with a larger gas leakage concentration to enter the subsequent comparison until the device with the largest gas leakage concentration is determined, and use this device as the master node device; adjacent gas leakage monitoring devices communicate through a near-field communication module; Step S30, the master node device obtains the gas leakage concentration information detected by each gas leakage monitoring device, determines the alarm level information corresponding to each gas leakage monitoring device according to this information, and sends it to the corresponding gas leakage monitoring device; Step S40, each gas leakage monitoring device performs an alarm action according to the received alarm level information to perform on-site linkage alarm.

2. The gas leakage monitoring method according to claim 1, wherein After step S40, it further includes: The master node device sends the gas leakage concentration information detected by each gas leakage monitoring device and the alarm level information to the upper computer management system; The upper computer constructs and displays a gas leakage cloud map according to the received gas leakage concentration information and alarm level information of each gas leakage monitoring device.

3. The gas leakage monitoring method according to claim 1, wherein The method for determining the alarm level information in step S40 is: Based on the preset mapping relationship between gas concentration and alarm level, obtain the alarm level information; or According to the full amount of gas leakage concentration information obtained by the master node device, generate the alarm level information of each gas leakage monitoring device according to the preset number of level levels and the proportion of each level.

4. The gas leakage monitoring method according to claim 3, wherein The alarm level information includes two pieces of information, a and b, where a represents the alarm level and b represents the ranking of the device based on the concentration value within this level.

5. The gas leakage monitoring method according to claim 1 or 4, characterized in that, The alarm action of the gas leakage monitoring device includes light alarm and / or sound alarm; The light alarm performs differential color alarm according to the alarm level information; The sound alarm performs differential frequency and / or differential sound type alarm according to the alarm level information.

6. The gas leakage monitoring method according to claim 4, wherein For the light alarm of the same level, perform differential color depth alarm according to the sorting information of b in the alarm level information.

7. A mobile gas leakage monitoring device for implementing the gas leakage monitoring method according to any one of claims 1-6, comprising a gas sensor, a main control module, a power supply module, and a housing, characterized in that, It also includes an alarm module, a communication module, and a storage module; The alarm module includes a light alarm device and / or a sound alarm device; The communication module includes a remote communication module and a near-field communication module; the remote communication module is used for information communication with the upper computer management system; the near-field communication module is used for information communication with other mobile gas leakage monitoring devices within the set area; The storage module is used for storing gas sensor detection data and interaction data between gas leakage monitoring devices.

8. The mobile gas leakage monitoring device according to claim 7, characterized in that, The light alarm device can perform displays of multiple colors and various color depths; The sound alarm device can output differential frequencies and / or differential sound types.

9. The mobile gas leakage monitoring device according to claim 7, characterized in that, The outer shell is in a conical barrel structure or a telescopic cylinder structure.

10. A mobile gas leakage monitoring system, characterized in that, It includes multiple mobile gas leakage monitoring devices as claimed in claim 8 within the set area and an upper computer management system; The mobile gas leakage monitoring device is set at the monitoring point, and the distance between adjacent mobile gas leakage monitoring devices is less than the set near-field communication distance; When the distance between adjacent detection points is greater than the set near-field communication distance, a mobile gas leakage monitoring device is added as a near-field communication relay between the two monitoring points. The upper computer management system obtains the monitoring information of all mobile gas leakage monitoring devices within the set area, obtains the alarm level information of each mobile gas leakage monitoring device based on preset rules, and generates a gas leakage cloud map.

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