Method for standardizing liquefied gas bottle use end management based on internet-of-things digital platform

Abstract

The invention discloses a method for standardizing liquefied gas bottle use end management based on an internet-of-things digital platform, and relates to the technical field of liquefied gas bottle management.The method comprises the specific steps that a vibration switch is installed on a liquefied gas bottle, and a positioning function is conducted and triggered through the vibration switch when the liquefied gas bottle moves and is collided by external force; by integrating the MEMS gas sensor and multiple positioning technologies, real-time monitoring and leakage detection of the liquefied gas bottle are realized, the MEMS gas sensor regularly and continuously monitors the concentration of gas around the liquefied gas bottle, once an abnormal concentration value is detected, the system immediately triggers an alarm, and early warning information is sent to a manager through the cloud platform, so that the safety of the liquefied gas bottle is ensured. Therefore, the management personnel can take measures in the first time, and a plurality of positioning technologies ensure that the liquefied gas bottle is accurately positioned in any environment, so that accurate position information can be provided indoors or outdoors.

Description

Technical Field

[0001] The present invention relates to the technical field of liquefied gas cylinder management, and in particular to a method for regulating the management of liquefied gas cylinder users based on an Internet of Things digital platform. Background Art

[0002] In the management and use of liquefied gas cylinders, ensuring safety is of vital importance. As a common energy source, liquefied gas is widely used in many fields such as households, catering and industry. However, in the use and storage of liquefied gas, if it is improperly managed or there are safety hazards, it is very easy to cause serious accidents such as fire and explosion. Therefore, effective supervision of liquefied gas cylinders has become an issue that needs to be solved urgently.

[0003] At present, the existing method of managing the use of liquefied gas cylinders uses QR codes and RFID tags for positioning, which cannot track the location of the liquefied gas cylinders in real time, resulting in the inability to determine whether the liquefied gas cylinders are used in compliant locations. At the same time, it is also impossible to determine whether the gas cylinders are inflated at compliant filling stations. In terms of safety monitoring, the existing technology cannot determine in real time whether there is a gas leak during use, and cannot promptly handle and warn of potential gas leakage safety hazards, thereby endangering life and property safety.

[0004] In summary, the existing liquefied gas cylinder management technology has obvious defects in the key links of positioning and safety monitoring. These defects seriously affect the safety and standardization of the use of liquefied gas cylinders, and cannot meet the needs of modern society for efficient management of liquefied gas cylinders. A more advanced management method based on the Internet of Things digital platform is urgently needed to solve these problems. Summary of the invention

[0005] The purpose of the present invention is to make up for the shortcomings of the prior art and provide a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform. It can track the location of liquefied gas cylinders in real time by combining Beidou positioning, GPS positioning, WIFI positioning, base station positioning and MEMS gas sensing technology to ensure that they are used in compliant locations and issue an early warning in the first time when a leak occurs, thereby effectively avoiding potential safety hazards, realizing real-time positioning of liquefied gas cylinders and leakage warning, and greatly improving the level of urban safety management.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for standardizing the management of liquefied gas cylinder users based on the Internet of Things digital platform, the specific steps of the method are:

[0007] S100, a vibration switch is installed on the liquefied gas cylinder, and the vibration switch is turned on and triggers the positioning function when the liquefied gas cylinder moves or is hit by external force;

[0008] The vibration switch is in an open circuit state when stationary, and normal operation of touching and switching the angle valve will not trigger positioning;

[0009] S200, using a variety of positioning methods to accurately locate the liquefied gas cylinder and obtain location information, the positioning methods include: Beidou positioning, GPS positioning, WIFI positioning, base station positioning, where:

[0010] When the liquefied gas cylinder is located outdoors, use Beidou and GPS positioning;

[0011] When the liquefied gas cylinder is located indoors, use WIFI and base station positioning;

[0012] S300, setting an electronic fence area on the cloud platform based on the positioning information, and triggering an electronic fence alarm when the liquefied gas cylinder is not used in the fence area, wherein the electronic fence area is set by geographic coordinates and building boundary information;

[0013] S400, using MEMS gas sensor timing trigger to detect liquefied gas leaks;

[0014] S500, when a gas leak is detected, the MEMS gas sensor transmits the leak information to the cloud platform, the leak information includes the time of the leak, the gas tank number and the estimated value of the leaked gas concentration, and the cloud platform sends an early warning message to the management personnel via SMS according to the severity of the leak, the severity of the leak includes light leak, moderate leak and heavy leak, and S500 includes:

[0015] S501, the MEMS gas sensor regularly monitors the gas concentration around the liquefied gas cylinder. When the sensor detects that the gas concentration exceeds a threshold, it is determined to be a gas leak;

[0016] S502, determining the time of leakage and the number of the gas tank;

[0017] S503, calculating an estimated value of the concentration of the leaked gas according to the reading of the MEMS gas sensor;

[0018] S504, judging the leakage degree according to the estimated value, that is, comparing the calculated leakage gas concentration estimate value with the concentration thresholds corresponding to different leakage degrees to judge the severity of the leakage;

[0019] S505, sending warning information to management personnel according to the leakage degree;

[0020] S600 receives leakage information and warning information through the IoT cloud platform, and performs centralized equipment management of liquefied gas cylinders. The equipment management performs batch management and rapid positioning of gas tank equipment by project, and authorizes equipment for sharing and transfer.

[0021] Furthermore, when the liquefied gas cylinder moves and is hit by an external force, the state judgment and positioning trigger of the vibration switch in S100 are expressed as follows: Where V(t) is the voltage output of the vibration switch at time t, V th is the trigger threshold voltage of the vibration switch, T on is the opening time of the vibration switch, V out (t) represents the output state of the vibration switch at time t, that is, 1 represents conduction and triggers positioning, and 0 represents non-conduction and does not trigger positioning.

[0022] Furthermore, the S100 is for the normal operation of the touch and switch angle valve by setting the integral time T int to confirm vibration to distinguish between normal operation, movement and collision, i.e. For V int (t) exceeds the integral threshold V int,th When , the vibration switch is considered to be effectively triggered: Where V represents voltage, τ is the integral variable, i.e., the time point between the start of integration and time t, V(τ) represents the voltage output of the vibration switch at time τ, V int (t) represents the integral value of the voltage output V(τ) from the integration start time to time t, V int,th It is the threshold used to determine the vibration switch triggering positioning due to vibration.

[0023] Furthermore, when the liquefied gas cylinder is located outdoors, the S300 uses the current position coordinates of the liquefied gas cylinder as (x, y) and sets the electronic fence area as a polygon, whose vertex coordinates are (x1, y1), (x2, y2), ..., (x n ,y n ), calculate the distance d from the position of the liquefied gas cylinder to each side of the electronic fence i , for the edge (x i ,y i )-(x i+1 ,y i+1 ) Its distance d i for: For d i ≥0 means on one side of the edge, for d i <0 means on the other side of the edge, for all d i If both conditions are satisfied that they are on one side defined by the polygon, the liquefied gas cylinder is determined to be within the electronic fence area, otherwise the electronic fence alarm is triggered.

[0024] Furthermore, the S300 triggers the electronic fence alarm in the same manner when the liquefied gas cylinder is located indoors and when it is located outdoors.

[0025] Furthermore, the MEMS gas sensor in S400 adopts low power consumption technology to support pulse power supply, so as to perform gas detection by timing triggering.

[0026] Furthermore, the S504 determines the background gas concentration C by monitoring the environment without leakage. b for: Where T is the monitoring time period, C s (t) is the gas concentration detected by the MEMS gas sensor at time t, and the change in gas concentration is calculated to determine the increase in gas concentration after the leak occurs ΔC(t): ΔC(t) = C s (t)-C b , integrate ΔC(t) within the time Δt after the leakage occurs to calculate the total concentration estimate C of the leaked gas e : Where t0 is the time when the leak occurs, Δt is the time change of monitoring after the leak, and the estimated value C according to the concentration of the leaked gas e The concentration is compared with the concentration thresholds corresponding to different leakage degrees to determine the severity of the leakage.

[0027] Furthermore, the S505 uses the concentration estimation value C e Compare with different leakage degree thresholds to determine the leakage degree and send warning information. The leakage concentration threshold is C l and C h , the leakage degree judgment includes:

[0028] For C e ≤C l If it is a minor leak, the IoT cloud platform will send SMS and APP push notifications to remind management personnel to pay attention and check;

[0029] For C l ≤C e ≤C h If it is a moderate leak, the electronic fence alarm will be activated based on the reminder, restricting the further use of the gas cylinder and notifying the management staff to go to the site for processing;

[0030] For C e ≥C h If it is a serious leak, the emergency alarm mechanism will be triggered immediately, the emergency rescue number will be automatically dialed through the cloud platform, and the processing progress will be tracked in real time using the Internet of Things cloud platform.

[0031] Furthermore, the S600 cloud platform is accessed through a web browser and WeChat applet, manages equipment by project, supports authorization management, and also supports the current location and historical trajectory tracking of gas tanks, electronic fence alarms, gas leak alarms, anti-dismantling alarms, and low-battery alarms.

[0032] Compared with the prior art, the method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform has the following beneficial effects:

[0033] 1. The present invention realizes real-time monitoring and leakage detection of liquefied gas cylinders by integrating MEMS gas sensors and multiple positioning technologies. Its MEMS gas sensors regularly and continuously monitor the gas concentration around the liquefied gas cylinders. Once an abnormal concentration value is detected, the system will immediately trigger an alarm and send early warning information to managers through the cloud platform, which enables managers to take measures at the first time. In addition, multiple positioning technologies ensure the precise positioning of liquefied gas cylinders in any environment, and can provide accurate location information whether indoors or outdoors. Based on this location information, the system sets an electronic fence, and automatically triggers an alarm when the gas cylinder is moved to an unauthorized area. This multi-level security mechanism not only improves the safety of liquefied gas cylinders, but also enhances the flexibility and response speed of management.

[0034] 2. The present invention realizes the centralized management of massive liquefied gas cylinders through the Internet of Things cloud platform. The cloud platform can be accessed in a variety of ways and utilizes project management equipment to facilitate batch management and rapid positioning. It also supports authorization management to facilitate the sharing and transfer of equipment management rights. The cloud platform also supports the current location and historical trajectory tracking of gas tanks, gas leakage alarms, anti-dismantling alarms, and low-power alarms, which reduces the workload and difficulty of manual management and improves the accuracy and timeliness of management.

[0035] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0037] Figure 1 It is an operation flow chart of a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform;

[0038] Figure 2 The present invention is a flowchart of the specific steps of S500 in a method for regulating the user-end management of liquefied gas cylinders based on an Internet of Things digital platform. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1

[0041] This embodiment demonstrates the application of a method for regulating the end-use management of liquefied gas cylinders based on an IoT digital platform in the urban catering industry. By installing vibration switches and MEMS gas sensors on liquefied gas cylinders and combining a variety of positioning technologies with the IoT cloud platform, accurate positioning, leakage detection and centralized management of liquefied gas cylinders in catering venues are achieved, effectively improving the safety and management efficiency of liquefied gas cylinders in complex catering environments.

[0042] First, in the indoor environment of the urban catering industry, a vibration switch and a MEMS gas sensor are installed for each liquefied gas cylinder. The vibration switch is installed on the side and top of the gas cylinder to ensure that the mobile trigger signal can be accurately detected. That is, the voltage output of the vibration switch at time t is V(t), and the trigger threshold voltage is V th , the opening time is T on According to its working principle, when the gas cylinder is stationary, the vibration switch is in an open circuit state, and V(t) = 0. When the gas cylinder is hit or moved by external force and the vibration reaches an appropriate level, V(t) will change. Its state judgment and positioning trigger are expressed as: Where V out (t) indicates the output state of the vibration switch at time t. 1 indicates that it is on and triggers positioning, and 0 indicates that it is not on and does not trigger positioning. For normal operations such as touch and switch angle valves, in order to avoid false triggering of the positioning function, the integral time T is set. int To confirm vibration to distinguish normal operation, movement and collision, the integral value of the voltage output V(τ) from the integration start time to time t is V i nt(t)=∫(τ)dτ. In normal operation, the vibration caused by touching and switching the angle valve is small, so the value of V(τ) is also small. The integrated value V int (t) will not exceed the integral threshold V int,th , that is, when V int (t) <V int,th When the vibration switch is not triggered, V out (t)=0, only when V int (t)≥V int,th When the vibration switch is considered to be effectively triggered, and V out(t) = 1. The MEMS gas sensor should be installed inside the gas cylinder near the liquefied gas outlet and the gas gathering area, and use low-power technology to support pulse power supply to perform gas detection by timing triggering.

[0043] Then, in the indoor dining environment, WIFI and base station positioning are mainly used to locate the liquefied gas cylinder. For WIFI positioning, the WIFI environment in the restaurant should be evaluated first. Make sure there are enough WIFI signals with sufficient strength available around. WIFI positioning calculates the location of the liquefied gas cylinder by analyzing the signal strength and propagation time of multiple WIFI access points. Base station positioning uses the signal of the mobile communication base station to determine the approximate location of the liquefied gas cylinder. The two positioning methods work together to improve the accuracy of positioning. The restaurant manager can set the electronic fence area as a polygon based on the geographic coordinates and building boundary information on the cloud platform. The vertex coordinates are (x1, y1), (x2, y2), ..., (x n ,y n ), establish a plane rectangular coordinate system with a corner in the kitchen as the origin, set the current position coordinates of the liquefied gas cylinder as (x, y), and calculate the distance d from the position of the liquefied gas cylinder to each side of the electronic fence i , for the edge (x i ,y i )-(x i+1 ,y i+1 ), whose distance d i for: When i ≥0 means on one side of the edge, when d i <0 means on the other side of the edge, if all d i If both of them are on one side of the polygon, the gas cylinder is judged to be within the electronic fence area, otherwise the electronic fence alarm is triggered. For example, if the electronic fence is set to a specific area in the kitchen, when the gas cylinder is accidentally moved to another area of ​​the kitchen, by calculating the distance from the gas cylinder position to each side of the electronic fence, d i <0, thus triggering an alarm.

[0044] Subsequently, the MEMS gas sensor regularly monitors the gas concentration around the liquefied gas cylinder. The monitoring time period is set to T. The environment is monitored without leakage to determine the background gas concentration. Among them C s (t) is the gas concentration detection value of the MEMS gas sensor at time t. When the sensor detects that the gas concentration exceeds the threshold, it is judged as a gas leak. Assume that the time when the leak occurs is t0, and the time change after the leak is Δt, calculate the change in gas concentration ΔC(t) = C s (t)-C b, integrate ΔC(t) within the time Δt after the leak occurs to calculate the total concentration estimate of the leaked gas For example, if at a certain time t, C s The value of (t) suddenly increases and exceeds the set threshold, indicating that gas leakage may have occurred. At this time, by calculating C e To further determine the severity of the leak, according to the calculated estimated value of the leaked gas concentration C e Compare with the concentration thresholds corresponding to different leakage degrees to determine the severity of the leakage. Set the concentration threshold for mild leakage as C l , the moderate leakage concentration threshold is C h , when C e ≤C l When it is a slight leak, the IoT cloud platform sends a text message and APP push notification to remind the restaurant manager to check. The text message content is "There may be a slight gas leak in a gas cylinder in the kitchen, please check it in time"; when C l ≤C e ≤C h When the leakage is moderate, in this case, not only the restaurant manager should be reminded through SMS and APP push notification, but also the electronic fence alarm should be activated to restrict the further use of the gas cylinder and notify the management staff to go to the scene to deal with it. That is, the electronic fence alarm will prevent the gas cylinder from being moved again, and the restaurant manager will receive a notification to arrange relevant personnel to go to the kitchen to check the gas cylinder. e ≥C h If it is a serious leak, the emergency alarm mechanism will be triggered immediately, and the emergency rescue phone will be automatically dialed through the cloud platform. The Internet of Things cloud platform will be used to track the processing progress in real time, and a notification will be sent to the restaurant manager to inform him that the gas cylinder has a serious leak. At the same time, the processing progress will be updated in real time, that is, whether the rescue personnel have set out and the estimated arrival time, etc.

[0045] Finally, when the gas cylinder is moved to an unauthorized area, based on the positioning and electronic fence setting mechanism, the system will immediately trigger the electronic fence alarm and notify the restaurant manager through the APP. For an area in the kitchen where the electronic fence is set, when the gas cylinder is moved to another area in the kitchen or the dining area of ​​the restaurant, the distance d from the gas cylinder to each side of the electronic fence is calculated. i If the situation d i<0 (indicates on the other side of the edge), an alarm is triggered. At the same time, the system will record the movement trajectory of the gas cylinder. The restaurant manager can view the historical trajectory of the gas cylinder on the cloud platform to understand the movement of the gas cylinder. The restaurant manager can centrally manage multiple liquefied gas cylinders through the IoT cloud platform. The cloud platform can be accessed through a web browser or WeChat applet, manage equipment by project, and support authorization management. For example, all gas cylinders in the kitchen can be managed as a project. On the cloud platform, you can view the current location, historical trajectory, and related alarm information of each gas cylinder. If a new gas cylinder is added to the kitchen, the restaurant manager can assign it to the kitchen project on the cloud platform. At the same time, the cloud platform also supports the current location and historical trajectory tracking of gas tanks, gas leak alarms, anti-disassembly alarms, low-power alarms and other functions. If the power of the gas cylinder is lower than the set value, the cloud platform will issue a low-power alarm to remind the restaurant manager to replace the battery in time or charge the gas cylinder-related equipment.

[0046] In summary, this embodiment realizes all-round management of liquefied gas cylinders in catering places, which not only improves the safety of liquefied gas cylinders and avoids potential safety hazards caused by leakage or improper location, but also improves management efficiency and facilitates restaurant managers to uniformly manage and monitor multiple gas cylinders. This management method based on the Internet of Things digital platform provides effective protection for the safe use of liquefied gas cylinders in the urban catering industry.

[0047] Embodiment 2

[0048] This embodiment describes the application of a method for regulating the user management of liquefied gas cylinders based on an Internet of Things digital platform in the outdoor environment of an industrial zone. By equipping the liquefied gas cylinders with relevant equipment and connecting them to the cloud platform, accurate positioning, leakage detection and efficient management of liquefied gas cylinders in industrial zones are achieved, effectively preventing the occurrence of industrial accidents and ensuring production safety in industrial zones.

[0049] In the outdoor environment of the industrial zone, each liquefied gas cylinder must first be installed and initialized. A vibration switch and a MEMS gas sensor, as well as a positioning device (including an antenna that supports Beidou and GPS positioning, etc.) must be installed on the cylinder. The vibration switch is installed at a suitable position on the cylinder. The voltage output at time t is V(t), and the trigger threshold voltage is V t h, the opening time is T on , when the cylinder is stationary, V(t) = 0, when it is impacted or moved by external force and satisfies V(t) ≥ V th And t ≥ T om When the vibration switch is turned on, its state judgment and positioning trigger are expressed as: Where V out (t) is the output state, 1 means conduction and triggering positioning, 0 means no conduction and no triggering positioning. For normal operations such as touch and switch angle valve, by setting the integral time Tint , let the integral value of the voltage output V(τ) from the start of integration to time t be V int (t)=∫(τ)dτ, when V int (t) exceeds the integral threshold V int,th It is triggered only when The MEMS gas sensor is installed at a suitable position inside the gas cylinder, using low-power technology to support pulse power supply and timed triggering to detect gas concentration. When installing the positioning equipment, ensure that the antenna signal is good to ensure accurate reception of satellite signals for positioning.

[0050] Then, outside the industrial area, the liquefied gas cylinder is mainly located by Beidou and GPS positioning methods. The Beidou and GPS positioning systems determine the location of the gas cylinder by receiving satellite signals. When the satellite signal is interfered or blocked, it can switch to WIFI or base station positioning as an auxiliary. The park manager sets the electronic fence area based on the geographic coordinates and building boundary information on the cloud platform. The current location coordinates of the liquefied gas cylinder are set to (x, y), and the electronic fence area is set to a polygon, and its vertex coordinates are (x1, y1), (x2, y2), ..., (x n ,y n ), calculate the distance d from the position of the liquefied gas cylinder to each side of the electronic fence i , for the edge (x i ,y i )-(x i+1 ,y i+1 ), whose distance d i for: When i ≥0 means on one side of the edge, when d i <0 means on the other side of the edge, if all d i If both are on one side defined by the polygon, the liquefied gas cylinder is determined to be within the electronic fence area, otherwise the electronic fence alarm is triggered. The MEMS gas sensor regularly monitors the gas concentration around the liquefied gas cylinder. The monitoring time period is set to T. In the absence of leakage, the environment is monitored to determine the background gas concentration Among them C s (t) is the gas concentration detected by the MEMS gas sensor at time t. When the sensor detects that the gas concentration exceeds the threshold, it is judged as a gas leak. Assume that the time when the leak occurs is t0, and the time change after the leak is Δt, calculate the change in gas concentration ΔC(t) = C s (t)-C b , integrate ΔC(t) within the time Δt after the leak occurs to calculate the total concentration estimate of the leaked gas According to the calculated estimated value of leakage gas concentration C eCompare with the concentration thresholds corresponding to different leakage degrees to determine the severity of the leakage. Set the concentration threshold for mild leakage as C l , the moderate leakage concentration threshold is C h , when C e ≤C l If it is a minor leak, the IoT cloud platform will send SMS and APP push notifications to remind the park managers to check. l ≤C e ≤C h In this case, the system automatically starts the moderate leakage processing procedure. First, it sends an alarm message to the park manager and relevant security personnel through the IoT cloud platform. Then, it starts the electronic fence to restrict the movement of the gas cylinder. That is, through the above electronic fence setting mechanism, when the position of the gas cylinder changes, its distance d to each side of the electronic fence is calculated. i If d appears i <0 (indicates on the other side), the cylinder cannot be moved, and the safety personnel are notified to go to the scene for processing. e ≥C h If it is a serious leak, the emergency alarm mechanism will be triggered immediately, the emergency rescue phone will be automatically dialed through the cloud platform, and the processing progress will be tracked in real time using the Internet of Things cloud platform.

[0051] Finally, in industrial areas, gas cylinders may be moved due to production needs. When a gas cylinder is moved to an unauthorized area, the system will immediately trigger an electronic fence alarm based on the positioning and electronic fence setting mechanism. For example, when a gas cylinder is mistakenly moved from one working area to another area where the use of gas cylinders is prohibited, the system will immediately trigger an electronic fence alarm based on the positioning and electronic fence setting mechanism. For example, when a gas cylinder is mistakenly moved from one working area to another area where the use of gas cylinders is prohibited, the system will immediately trigger an electronic fence alarm based on the positioning and electronic fence setting mechanism. i If d appears i If the value is less than 0, an alarm is triggered. At the same time, the system will record the movement trajectory of the gas cylinder. The park manager can view the historical trajectory of the gas cylinder on the cloud platform to understand the movement of the gas cylinder. The park manager can centrally manage multiple liquefied gas cylinders through the IoT cloud platform. The cloud platform can be accessed through a web browser or WeChat applet, manage equipment by project, and support authorization management. For example, gas cylinders in different work areas can be managed as different projects. On the cloud platform, you can view the current location, historical trajectory, and related alarm information of each gas cylinder. At the same time, the cloud platform also supports the current location and historical trajectory tracking of gas tanks, gas leak alarms, anti-dismantling alarms, low-power alarms and other functions.

[0052] In summary, comprehensive management of liquefied gas cylinders is achieved through this embodiment. This management method can accurately locate the position of gas cylinders, timely detect and handle leakage incidents, effectively prevent gas cylinders from being mistakenly moved to dangerous areas, improve the safety and management efficiency of the use of liquefied gas cylinders in industrial areas, and provide reliable protection for production activities in industrial areas.

[0053] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform, characterized in that: The specific steps of this method are: S100, a vibration switch is installed on the liquefied gas cylinder, and the vibration switch is turned on and triggers the positioning function when the liquefied gas cylinder moves or is hit by external force; The vibration switch is in an open circuit state when stationary, and normal operation of touching and switching the angle valve will not trigger positioning; S200, using a variety of positioning methods to accurately locate the liquefied gas cylinder and obtain location information, the positioning methods include: Beidou positioning, GPS positioning, WIFI positioning, base station positioning, where: When the liquefied gas cylinder is located outdoors, use Beidou and GPS positioning; When the liquefied gas cylinder is located indoors, use WIFI and base station positioning; S300, setting an electronic fence area on the cloud platform based on the positioning information, and triggering an electronic fence alarm when the liquefied gas cylinder is not used in the fence area, wherein the electronic fence area is set by geographic coordinates and building boundary information; S400, using MEMS gas sensor to trigger timing to detect liquefied gas leaks; S500, when a gas leak is detected, the MEMS gas sensor transmits the leak information to the cloud platform, the leak information includes the time of the leak, the gas tank number and the estimated value of the leaked gas concentration, and the cloud platform sends an early warning message to the management personnel via SMS according to the severity of the leak, the severity of the leak includes light leak, moderate leak and heavy leak, and S500 includes: S501, the MEMS gas sensor regularly monitors the gas concentration around the liquefied gas cylinder. When the sensor detects that the gas concentration exceeds a threshold, it is determined to be a gas leak; S502, determining the time of leakage and the number of the gas tank; S503, calculating an estimated value of the concentration of the leaked gas according to the reading of the MEMS gas sensor; S504, judging the leakage degree according to the estimated value, that is, comparing the calculated leakage gas concentration estimate value with the concentration thresholds corresponding to different leakage degrees to judge the severity of the leakage; S505, sending warning information to management personnel according to the leakage degree; S600 receives leakage information and warning information through the IoT cloud platform, and performs centralized equipment management of liquefied gas cylinders. The equipment management performs batch management and rapid positioning of gas tank equipment by project, and authorizes equipment for sharing and transfer.

2. According to claim 1, a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform is characterized in that: When the liquefied gas cylinder moves and is hit by external force, the state judgment and positioning triggering of the vibration switch in S100 are expressed as follows: Where V(t) is the voltage output of the vibration switch at time t, V th is the trigger threshold voltage of the vibration switch, T on is the opening time of the vibration switch, V out (t) represents the output state of the vibration switch at time t, that is, 1 represents conduction and triggers positioning, and 0 represents non-conduction and does not trigger positioning.

3. According to claim 2, a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform is characterized in that: The S100 is for the normal operation of the touch and switch angle valve, by setting the integration time T int to confirm vibration to distinguish between normal operation, movement and collision, i.e. For V int (t) exceeds the integral threshold V int,th When , the vibration switch is considered to be effectively triggered: Where V represents voltage, τ is the integral variable, i.e., the time point between the start of integration and time t, V(τ) represents the voltage output of the vibration switch at time τ, V int (t) represents the integral value of the voltage output V(τ) from the integration start time to time t, V int,th It is the threshold used to determine the vibration switch triggering positioning due to vibration.

4. According to claim 1, a method for regulating the management of liquefied gas cylinder users based on an Internet of Things digital platform is characterized in that: When the liquefied gas cylinder is located outdoors, S300 uses the current position coordinates of the liquefied gas cylinder as (x, y) and sets the electronic fence area as a polygon whose vertex coordinates are (x1, y1), (x2, y2), ..., (x n ,y n ), calculate the distance d from the position of the liquefied gas cylinder to each side of the electronic fence i , for the edge (x i ,y i )-(x i+1 ,y i+1 ) Its distance d i for: For d i ≥0 means on one side of the edge, for d i <0 means on the other side of the edge, for all d i If both conditions are satisfied that they are on one side defined by the polygon, the liquefied gas cylinder is determined to be within the electronic fence area, otherwise the electronic fence alarm is triggered.

5. According to claim 4, a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform is characterized in that: The S300 triggers the electronic fence alarm in the same manner when the liquefied gas cylinder is located indoors or outdoors.

6. According to claim 1, a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform is characterized in that: The MEMS gas sensor in the S400 adopts low-power technology to support pulse power supply and performs gas detection by timing triggering.

7. According to claim 1, a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform is characterized in that: The S504 determines the background gas concentration C by monitoring the environment without leakage. b for: Where T is the monitoring time period, C s (t) is the gas concentration detected by the MEMS gas sensor at time t, and the change in gas concentration is calculated to determine the increase in gas concentration after the leak occurs ΔC(t): ΔC(t) = C s (t)-C b , integrate ΔC(t) within the time Δt after the leakage occurs to calculate the total concentration estimate C of the leaked gas e for: Where t0 is the time when the leak occurs, Δt is the time change of monitoring after the leak, and the estimated value C according to the concentration of the leaked gas e The concentration is compared with the concentration thresholds corresponding to different leakage degrees to determine the severity of the leakage.

8. According to claim 1, a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform is characterized in that: S505 uses the concentration estimation value C e Compare with different leakage degree thresholds to determine the leakage degree and send warning information. The leakage concentration threshold is C l and C h , the leakage degree judgment includes: For C e ≤C l If it is a minor leak, the IoT cloud platform will send SMS and APP push notifications to remind management personnel to pay attention and check; For C l ≤C e ≤C h If it is a moderate leak, the electronic fence alarm will be activated based on the reminder, restricting the further use of the gas cylinder and notifying the management staff to go to the site for processing; For C e ≥C h If it is a serious leak, the emergency alarm mechanism will be triggered immediately, the emergency rescue number will be automatically dialed through the cloud platform, and the processing progress will be tracked in real time using the Internet of Things cloud platform.

9. According to claim 1, a method for regulating the management of liquefied gas cylinder users based on the Internet of Things digital platform is characterized in that: The S600 cloud platform is accessed through a web browser and WeChat applet, manages equipment by project, supports authorization management, and also supports the current location and historical trajectory tracking of gas tanks, electronic fence alarms, gas leak alarms, anti-dismantling alarms, and low-battery alarms.

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