Combustible gas detection device for fuel dispenser

Abstract

The application relates to a combustible gas detection device for a refueling machine, which comprises a built-in power supply module, a gas concentration detection module, a wireless communication module, an alarm module and a control module; the control module is connected with the gas concentration detection module; the wireless communication module is connected with the control module; the alarm module is connected with the wireless communication module; and the built-in power supply module is connected with the gas concentration detection module, the wireless communication module, the alarm module and the control module respectively. The application has the effect of improving the convenience of the combustible gas detection device.

Description

Technical Field

[0001] This application relates to the field of combustible gas detection technology, and in particular to a combustible gas detection device for refueling machines. Background Technology

[0002] Petroleum products sold at gas stations are flammable, explosive, volatile, prone to leakage, and prone to accumulating static charge. When the fuel nozzle sprays gasoline into a car's fuel tank, it accelerates the evaporation of the gasoline, producing gasoline vapors. Meanwhile, electronic devices such as mobile phones, car navigation systems, Bluetooth headsets, and wireless smart bracelets constantly emit electromagnetic waves. Especially when people are making phone calls or using the internet, the electromagnetic waves emitted by these devices suddenly intensify. This sudden increase in electromagnetic waves can ionize the air and produce sparks. When the concentration of gasoline vapors is high, it can even cause an explosion, posing a safety hazard.

[0003] However, even though people don't use electronic devices at gas stations, it's difficult to prevent applications running on those devices from accessing the internet. In this case, it's essential for gas stations to be equipped with combustible gas detection devices.

[0004] Typically, combustible gas detection devices installed at gas stations are powered by external power systems, which makes the installation of these devices inconvenient. Summary of the Invention

[0005] To improve the convenience of combustible gas detection devices, this application provides a combustible gas detection device for fuel dispensers.

[0006] This application provides a combustible gas detection device for fuel dispensers, which adopts the following technical solution:

[0007] A combustible gas detection device for a fuel dispenser, characterized in that it includes a built-in power supply module, a gas concentration detection module, a wireless communication module, an alarm module, and a control module;

[0008] The control module is connected to the gas concentration detection module;

[0009] The wireless communication module is connected to the control module;

[0010] The alarm module is connected to the wireless communication module;

[0011] The built-in power supply module is connected to the gas concentration detection module, wireless communication module, alarm module and control module respectively.

[0012] By adopting the above technical solution, the gas concentration detection module, wireless communication module, alarm module and control module are powered by the built-in power supply module, eliminating the need for an external power supply system. This facilitates the installation and use of the combustible gas detection device and improves its convenience.

[0013] Optionally, the built-in power supply module includes an electromagnetic filter unit, a first rectifier filter unit, a protection unit, a switching unit, a transformer, and a second rectifier filter unit;

[0014] The first rectifier filter unit is connected to the electromagnetic filter unit;

[0015] The switching unit is connected to the first rectifier and filter unit, and is connected to the control module through the protection unit;

[0016] The primary coil of the transformer is connected to a switching unit, and the secondary coil is connected to a second rectifier and filter unit.

[0017] Optionally, the protection unit includes an overload protection subunit and an overvoltage protection subunit.

[0018] Optionally, the control module is further configured to:

[0019] Obtain oil and gas concentration data;

[0020] When the oil and gas concentration data reaches the preset first warning value, an alarm signal is sent to the alarm device;

[0021] When the oil and gas concentration data reaches the preset second warning value, a cut-off signal is sent to the fuel dispenser to stop the fuel dispenser from working.

[0022] Optionally, the control module is further configured to:

[0023] After acquiring the oil and gas concentration data, the method further includes:

[0024] Acquire first location information, second location information, and temperature information, wherein the first location information is the location of the gas detection sensor, and the second location information is the location of the fuel dispenser;

[0025] The average diffusion rate is determined based on the temperature information and oil and gas concentration data.

[0026] The oil and gas concentration data at the refueling machine is predicted based on the average diffusion rate, oil and gas concentration data, first location information, and second location information.

[0027] Optionally, the control module is further configured to:

[0028] The step of determining the average diffusion rate based on the temperature information and oil and gas concentration data includes:

[0029] Retrieve infrared model;

[0030] Based on the infrared model, temperature distribution information is determined according to the temperature information.

[0031] Acquire historical concentration data, which is historical data of oil and gas concentration at the fuel dispenser;

[0032] The average concentration was determined based on the historical concentration data.

[0033] The concentration difference is determined based on the average concentration and the oil and gas concentration data.

[0034] The average diffusion rate is determined based on the temperature distribution information and concentration difference.

[0035] Optionally, the control module is further configured to:

[0036] Determining the average concentration based on the historical concentration data includes:

[0037] Select oil and gas concentration data for a specified time period from the historical concentration data;

[0038] Calculate the average value of oil and gas concentration data for a specified time period to obtain the average concentration.

[0039] Optionally, the control module is further configured to:

[0040] The step of selecting oil and gas concentration data for a specified time period from the historical concentration data includes:

[0041] Get the current state;

[0042] If the current status is "in use", then the specified time period is the period during which the oil gun is used.

[0043] Optionally, the control module is further configured to:

[0044] The step of selecting oil and gas concentration data for a specified time period from the historical concentration data also includes:

[0045] If the current status is not in use, then the specified time period is the period during which the oil gun is not in use.

[0046] Optionally, the control module is further configured to:

[0047] The method for determining the second warning value includes:

[0048] Obtain humidity and air pressure information;

[0049] Based on the warning value reference table, a second warning value is determined according to the temperature, humidity and air pressure information.

[0050] In summary, this application includes at least one of the following beneficial technical effects:

[0051] This application uses a built-in power supply module to power the gas concentration detection module, wireless communication module, alarm module and control module, eliminating the need for an external power supply system. This facilitates the installation and use of the combustible gas detection device and improves its convenience. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of a combustible gas detection device for a fuel dispenser according to an embodiment of this application.

[0053] Figure 2 This is a schematic diagram of the built-in power supply module in an embodiment of this application.

[0054] Figure 3 This is a flowchart illustrating the control module in an embodiment of this application.

[0055] Explanation of reference numerals in the attached diagram: 1. Power supply module; 11. Electromagnetic filter unit; 12. First rectifier and filter unit; 131. Overload protection subunit; 132. Overvoltage protection subunit; 14. Switching unit; 15. Transformer; 16. Second rectifier and filter unit; 2. Gas concentration detection module; 3. Wireless communication module; 4. Alarm module; 5. Control module. Detailed Implementation

[0056] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-3 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0057] This application discloses a combustible gas detection device for fuel dispensers, which is highly convenient.

[0058] Reference Figures 1-3 The combustible gas detection device for fuel dispensers includes a power supply module 1, a gas concentration detection module 2, a wireless communication module 3, an alarm module 4, and a control module 5. The housing of the combustible gas detection device of this application is also equipped with a magnet, which allows it to be attached to the fuel dispenser for easy installation.

[0059] The power supply module 1 includes an electromagnetic filter unit 11, a first rectifier filter unit 12, a protection unit, a switching unit 14, a transformer 15, and a second rectifier filter unit 16.

[0060] The electromagnetic filtering unit 11 is used to filter out electromagnetic interference. In this application, the electromagnetic filtering unit 11 is selected as an electromagnetic interference filter.

[0061] The first rectifier and filter unit 12 is connected to the electromagnetic filter unit 11 and is used to rectify and filter the power supply. In this application, the first rectifier and filter unit 12 is selected as a bridge rectifier circuit and a filter.

[0062] The switching unit 14 is connected to the first rectifier and filter unit 12 and to the control module 5 via the protection unit. The primary coil of the transformer 15 is connected to the switching unit 14, and the secondary coil is connected to the second rectifier and filter unit 16. The switching unit 14 provides a stable power supply; that is, when the switching unit 14 stops working, the gas concentration detection module 2 also stops working. The transformer 15 regulates the power supply voltage, and the second rectifier and filter unit 16 rectifies and filters the regulated power supply voltage to make it more stable. The protection unit protects the power circuit and includes an overload protection subunit 131 and an overvoltage protection subunit 132. The overload protection subunit 131 cuts off the power supply when the load in the circuit is too high to protect the circuit. The overvoltage protection subunit 132 cuts off the power supply when the voltage in the circuit is too high to protect the circuit. In this application, the second rectifier and filter unit 16 uses a bridge rectifier circuit and a filter.

[0063] Gas concentration detection module 2 is connected to the second rectifier and filter unit 16, control module 5 is connected to gas concentration detection module 2, wireless communication module 3 is connected to the second rectifier and filter unit 16 and control module 5 respectively, and alarm module 4 is connected to the second rectifier and filter unit 16 and wireless communication module 3 respectively.

[0064] Furthermore, the control module 5 can monitor the concentration of oil and gas at the gas station and issue an alarm when the concentration is too high, in order to prevent fires or explosions caused by excessive oil and gas concentration.

[0065] Specifically, control module 5 is configured as follows:

[0066] like Figure 1 As shown:

[0067] Step S110: Obtain oil and gas concentration data.

[0068] Among them, the oil and gas concentration data refers to the concentration of combustible gases in the air inside the gas station, which can be detected by combustible gas concentration detection sensors, specifically catalytic combustible gas detectors, semiconductor combustible gas detectors, and natural diffusion combustion detectors.

[0069] Step S120: When the oil and gas concentration data reaches the preset first warning value, an alarm signal is sent to the alarm device.

[0070] Step S130: When the oil and gas concentration data reaches the preset second warning value, a cut-off signal is sent to the fuel dispenser to stop the fuel dispenser from working.

[0071] The first warning value is lower than the second warning value. When the oil and gas concentration data does not reach the first warning value, no alarm will sound; when the oil and gas concentration data is higher than the first warning value but not higher than the second warning value, the refueling machine will not be stopped. In some specific embodiments, the magnitudes of the first and second warning values ​​can be adaptively adjusted according to actual needs.

[0072] It is worth noting that in actual use, the concentration of oil and gas detected by a combustible gas detector is usually related to its installation location; that is, the detected oil and gas concentration data is actually the concentration of oil and gas in a certain area around the detector. However, the area of ​​a gas station is often much larger than the detection range of the combustible gas detector. When oil and gas leaks, the molecules diffuse from areas of high concentration to areas of low concentration, resulting in varying oil and gas concentrations at different locations within the gas station. In this case, there may be a significant distance between the installation location of the combustible gas detector and the location of the oil and gas leak, causing a discrepancy between the detected concentration data and the actual concentration at the leak location. This can lead to situations where the detected concentration of oil and gas has not reached the first warning value, while the actual concentration at the leak location has already exceeded the first warning value. In such cases, the combustible gas detector cannot issue an alarm in a timely manner. Therefore, this application also provides a method for processing the collected oil and gas concentration data. The details are as follows:

[0073] Step S210: Obtain first location information, second location information, and temperature information.

[0074] The first location information is the positioning position of the gas detection sensor. The second location information is the positioning position of the fuel dispenser. The temperature information is the temperature of the fuel dispenser. The first and second location information can be obtained through a positioning device. The temperature information can be obtained through a temperature detection device installed on the fuel dispenser.

[0075] Step S220: Determine the average diffusion rate based on the temperature information and oil and gas concentration data.

[0076] The average diffusion rate is the diffusion rate of oil and gas molecules.

[0077] Optionally, step S220 includes the following steps (steps S221 to S226):

[0078] Step S221: Retrieve the infrared model.

[0079] The infrared model is a model that reflects the temperature distribution near the refueling machine at different temperatures, and it can be trained based on historical data. The infrared model can be pre-stored in a storage device with storage capabilities, such as a memory.

[0080] Step S222: Based on the infrared model, determine the temperature distribution information according to the temperature information.

[0081] Temperature distribution information reflects how temperature changes with distance. Once temperature information is obtained, the temperature distribution at that temperature can be simulated using an infrared model.

[0082] Step S223: Obtain historical concentration data.

[0083] Historical concentration data refers to the historical data on the oil and gas concentration at the fuel nozzle. This historical concentration data can be the predicted oil and gas concentration at the fuel nozzle based on the collected oil and gas concentration data at any given moment.

[0084] Step S224: Determine the average concentration based on the historical concentration data.

[0085] The average concentration is the average of all oil and gas concentration data in the historical concentration data. The average concentration can be used as a reference value for the oil and gas concentration at the fuel dispenser, so as to predict the actual oil and gas concentration data at the fuel dispenser.

[0086] Understandably, the vapor concentration at the fuel dispenser is higher when the nozzle is in use than when it is not, as using the nozzle accelerates the evaporation of fuel vapors. Therefore, to make the average concentration more reliable, it is necessary to determine the average concentration based on the current operating status of the nozzle when predicting the vapor concentration at the fuel dispenser.

[0087] Specifically, oil and gas concentration data for a specified time period are selected from historical concentration data, and the average concentration of the oil and gas data for the specified time period is calculated to obtain the average concentration. If the fuel dispenser is currently in use, the specified time period is the period during which the fuel dispenser is in use. If the fuel dispenser is currently not in use, the specified time period is the period during which the fuel dispenser is not in use.

[0088] Step S225: Determine the concentration difference based on the average concentration and the oil and gas concentration data.

[0089] The concentration difference is the difference between the average concentration and the oil and gas concentration data.

[0090] Step S226: Determine the average diffusion rate based on the temperature distribution information and concentration difference.

[0091] The average diffusion rate is the diffusion rate of oil and gas molecules. The diffusion rate of oil and gas molecules is affected by temperature and concentration difference. Higher temperatures and greater concentration differences result in faster diffusion.

[0092] It should be noted that the temperature distribution information reflects the temperature information at different locations. That is, the temperature of the fuel dispenser and the temperature of the combustible gas detector may differ. Therefore, the diffusion rate may also differ at different locations. In a specific embodiment, a relationship can be established between temperature distribution information, concentration difference, and average diffusion rate. Once the temperature distribution information and concentration difference are determined, the average diffusion rate can be obtained from them.

[0093] Step S230: Predict the oil and gas concentration data at the refueling machine based on the average diffusion rate, oil and gas concentration data, first location information, and second location information.

[0094] Since oil and gas molecules diffuse from locations of high concentration to locations of low concentration, the oil and gas concentration data at the refueling machine can be predicted based on its average diffusion rate and the distance between the refueling machine and the combustible gas detector.

[0095] Furthermore, if there is a height difference between the first position information and the second position information, the diffusion velocity in different directions can be determined, and then the average diffusion velocity in the synthesis direction can be determined.

[0096] Considering the impact of the environment on oil and gas concentration, different second warning values ​​should be set for different environments so that the combustible gas detection system can provide more accurate warnings and reduce the possibility of safety problems.

[0097] Specifically, first, humidity and air pressure information are acquired. Then, based on a warning value lookup table, a second warning value is determined according to the temperature, humidity, and air pressure information. The warning value lookup table can be pre-stored in a storage device with storage capabilities, such as a memory.

[0098] The implementation principle of a combustible gas detection device for a fuel dispenser according to an embodiment of this application is as follows: the built-in power supply module 1 supplies power to the gas concentration detection module 2, the wireless communication module 3, the alarm module 4, and the control module 5, eliminating the need for an external power supply system. This facilitates the installation and use of the combustible gas detection device and improves its convenience.

[0099] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A combustible gas detection device for a fuel dispenser, characterized in that: It includes a built-in power supply module (1), a gas concentration detection module (2), a wireless communication module (3), an alarm module (4), and a control module (5); The control module (5) is connected to the gas concentration detection module (2); The wireless communication module (3) is connected to the control module (5); The alarm module (4) is connected to the wireless communication module (3); The built-in power supply module (1) is connected to the gas concentration detection module (2), the wireless communication module (3), the alarm module (4), and the control module (5), respectively; The built-in power supply module (1) includes an electromagnetic filter unit (11), a first rectifier filter unit (12), a protection unit, a switching unit (14), a transformer (15), and a second rectifier filter unit (16); The first rectifier filter unit (12) is connected to the electromagnetic filter unit (11); The switching unit (14) is connected to the first rectifier and filter unit (12) and is connected to the control module (5) through the protection unit; The primary coil of the transformer (15) is connected to the switching unit (14), and the secondary coil is connected to the second rectifier and filter unit (16). The protection unit includes an overload protection subunit (131) and an overvoltage protection subunit (132); The control module (5) is further configured as follows: Obtain oil and gas concentration data; When the oil and gas concentration data reaches the preset first warning value, an alarm signal is sent to the alarm device; When the oil and gas concentration data reaches the preset second warning value, a cut-off signal is sent to the fuel dispenser to stop the fuel dispenser from working. The control module (5) is further configured as follows: After acquiring the oil and gas concentration data, the method further includes: Acquire first location information, second location information, and temperature information, wherein the first location information is the location of the gas detection sensor, and the second location information is the location of the fuel dispenser; The average diffusion rate is determined based on the temperature information and oil and gas concentration data. Predict the oil and gas concentration data at the fuel dispenser based on the average diffusion rate, oil and gas concentration data, first location information, and second location information. The control module (5) is further configured as follows: The step of determining the average diffusion rate based on the temperature information and oil and gas concentration data includes: Retrieve the infrared model; Based on the infrared model, temperature distribution information is determined according to the temperature information. Acquire historical concentration data, which is historical data of oil and gas concentration at the fuel dispenser; The average concentration was determined based on the historical concentration data. The concentration difference is determined based on the average concentration and the oil and gas concentration data. The average diffusion rate is determined based on the temperature distribution information and concentration difference.

2. The combustible gas detection device for a fuel dispenser according to claim 1, characterized in that: The control module (5) is further configured as follows: Determining the average concentration based on the historical concentration data includes: Select oil and gas concentration data for a specified time period from the historical concentration data; Calculate the average value of oil and gas concentration data for a specified time period to obtain the average concentration.

3. The combustible gas detection device for a fuel dispenser according to claim 2, characterized in that: The control module (5) is further configured as follows: The step of selecting oil and gas concentration data for a specified time period from the historical concentration data includes: Get the current state; If the current status is "in use", then the specified time period is the period during which the oil gun is used.

4. The combustible gas detection device for a fuel dispenser according to claim 3, characterized in that: The control module (5) is further configured as follows: The step of selecting oil and gas concentration data for a specified time period from the historical concentration data also includes: If the current status is not in use, then the specified time period is the period during which the oil gun is not in use.

5. The combustible gas detection device for a fuel dispenser according to claim 1, characterized in that: The control module (5) is further configured as follows: The method for determining the second warning value includes: Obtain humidity and air pressure information; Based on the warning value reference table, a second warning value is determined according to the temperature, humidity and air pressure information.

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