Equipment and method for preventing vehicle from pulling oil pipe and escaping orders in gas station

Abstract

The invention discloses a device and method for preventing a vehicle from pulling an oil pipe and escaping an order in a gas station, and relates to the technical field of gas station retail, the device comprises n distance monitoring units, an oil gun position detection unit and an alarm unit, the number of the distance monitoring units corresponds to the number of refueling machines, and the alarm unit is connected with the n distance monitoring units. The distance monitoring unit, the oil gun position detection unit and the alarm unit are configured as follows: when the oil gun position detection unit detects that the oil gun is in a state of being taken down from the oiling machine, and the sensing distances monitored by all the distance monitoring structures in the distance monitoring unit located at the same oiling machine as the oil gun are changed, the alarm unit gives an alarm; the alarm unit responds to the signals and sends out alarm information. According to the scheme, the refueling vehicle of each refueling machine does not need to be continuously observed manually, only whether the vehicle possibly has the behavior of pulling the oil pipe or not needs to be judged according to the alarm information, and the scheme saves manpower in use and is high in accuracy.

Description

Technical Field

[0001] This invention relates to the field of gas station retail technology, specifically to a device and method for preventing vehicles from pulling fuel hoses and evading payment at gas stations. Background Technology

[0002] Gas station attendants typically oversee several fuel dispensers. After refueling or while refueling is in progress, if the fuel nozzle is not properly repositioned and remains inserted into the vehicle's fuel inlet, and the vehicle drives away without noticing the nozzle still on the tank, the rubber fuel hose can often be severed, potentially pulling down the entire dispenser. This not only causes equipment damage ranging from thousands to tens of thousands of yuan, but also poses a serious safety hazard due to fuel leaks, such as fires or explosions, with unimaginable consequences.

[0003] After refueling, the fuel nozzle was put back in its original position, but the driver fled the scene without paying the refueling fee, which is called fare evasion.

[0004] Currently, gas stations rely on gas station attendants to manually monitor vehicles to prevent them from moving. Some gas stations use vertical barriers in front of vehicles to prevent movement. However, since gas station attendants have to monitor several pumps simultaneously, manually monitoring vehicles is ineffective and often results in vehicles being missed. Summary of the Invention

[0005] The present invention aims to solve the problem that existing gas stations rely on manual observation to determine whether a vehicle may have a ruptured fuel line, which is prone to missed detection.

[0006] To address the aforementioned problems, in a first aspect, the present invention provides a device for preventing vehicles from pulling fuel hoses and evading payment at gas stations. The device includes n distance monitoring units, the number of which corresponds to the number of fuel dispensers. Each distance monitoring unit has at least two distance monitoring structures, which monitor changes in the sensing distance when a vehicle is parked at the corresponding fuel dispenser. It also includes n fuel nozzle position detection units for detecting whether a corresponding fuel nozzle is being removed from the fuel dispenser. Finally, it includes an alarm unit for issuing alarm information at different fuel dispensers. The distance monitoring units, fuel nozzle position detection units, and alarm units are configured such that when a fuel nozzle position detection unit detects that a fuel nozzle is being removed from the fuel dispenser, and all sensing distances detected by the distance monitoring structures in the distance monitoring units located at the same fuel dispenser change, the alarm unit responds to the signal and issues an alarm.

[0007] The present invention provides a device for preventing vehicles from pulling fuel hoses and evading payment at gas stations, which, compared with the prior art, has the following beneficial effects, but is not limited to: The distance monitoring unit can have multiple sets of distance monitoring structures, each capable of monitoring vehicles at the same fuel dispenser to determine whether the vehicle is stationary or moving. The fuel nozzle position detection unit detects the position of the fuel nozzle to determine if there is a possibility of hose tampering. When the fuel nozzle position detection unit detects that the fuel nozzle is removed, indicating a potential refueling situation, and the corresponding distance monitoring structure in the distance monitoring unit detects that a refueling vehicle near the dispenser is likely to move, a signal is sent to the alarm unit. The alarm unit then responds to this signal and issues an alarm. In this scheme, the alarm unit only issues an alarm after all distance monitoring structures used to identify the stationary status of refueling vehicles at the dispenser have detected a change in sensing distance, thus minimizing false alarms and missed alarms. This scheme eliminates the need for continuous manual observation of refueling vehicles at each dispenser; instead, it only requires determining whether a vehicle is likely to tamper with the fuel nozzle based on alarm information. This solution is labor-saving and highly accurate.

[0008] As a further aspect of the present invention, the distance monitoring structure has an accuracy value at the millimeter level.

[0009] As a further aspect of the present invention: the distance monitoring structure has no fewer than four components, which are arranged along the width direction of the fuel dispenser. They are located at the location where the vehicle is parked and fixed on the fuel dispenser, and the sensing area matches the corresponding vehicle parking position.

[0010] As a further aspect of the present invention: the projections of the monitoring lines of the two outermost distance monitoring structures on the horizontal plane are inclined to the mounting surface of the fuel dispenser, and the monitoring lines generated by all distance monitoring structures in the same distance monitoring unit do not intersect within the formed monitoring area.

[0011] As a further aspect of the present invention, the alarm unit is configured to respond to the above signal and issue an alarm message only when the fuel nozzle position detection unit detects that the fuel nozzle is in a state of being removed from the fuel dispenser, and the sensing distance detected by all distance monitoring structures in the corresponding distance monitoring unit increases.

[0012] As a further aspect of the present invention, it also includes a payment information monitoring unit for monitoring whether the order of the fuel dispenser is in an unpaid state. The distance monitoring unit, alarm unit and payment information monitoring unit are configured such that when the sensing distance detected by all distance monitoring structures in the distance monitoring unit changes, and the payment information monitoring unit detects that the order of the corresponding fuel dispenser is in an unpaid state, the alarm unit responds to the above signal and issues an alarm message.

[0013] As a further aspect of the present invention: the alarm unit is configured to have a first alarm message and a second alarm message. When the fuel nozzle position detection unit detects that the fuel nozzle is being removed from the fuel dispenser, and the sensing distance detected by all distance monitoring structures in the corresponding distance monitoring unit changes, the alarm unit issues the first alarm message. When the sensing distance detected by all distance monitoring structures in the distance monitoring unit changes, and the payment information monitoring unit detects that the order for the corresponding fuel nozzle is in an unpaid state, the alarm unit issues the second alarm message.

[0014] As a further aspect of the present invention, it also includes a closed oil circuit unit for controlling the opening and closing states of the submersible pump and solenoid valve connected to the oil pipeline. When the fuel nozzle position detection unit detects that the fuel nozzle is in the state of being removed from the fuel dispenser, and the sensing distance detected by all distance monitoring structures in the corresponding distance monitoring unit changes, the closed oil circuit unit responds to the above signal and shuts off the submersible pump and solenoid valve connected to the corresponding fuel nozzle.

[0015] Secondly, the present invention provides a method based on the above-described device for preventing vehicles from pulling on fuel lines and evading payment at gas stations: when the fuel nozzle position detection unit detects that the fuel nozzle is removed from the fuel dispenser, and the sensing distance detected by all distance monitoring structures in the corresponding distance monitoring unit changes, the alarm unit responds to the above signal and issues an alarm message.

[0016] The method provided by this invention has, but is not limited to, the following beneficial effects compared to the prior art: By causing changes in the sensing distance detected by all distance monitoring structures, it is confirmed that the vehicle is indeed moving. Then, when the corresponding fuel nozzle is being removed from the fuel dispenser, it is determined that there may be a pulling of the fuel hose, causing the alarm unit to respond to the above signal and issue an alarm message. This method can effectively save manpower and improve the accuracy of judgment.

[0017] The present invention also provides a method based on the above-described device for preventing vehicles from pulling fuel hoses and evading payment at gas stations: when the sensing distances detected by all distance monitoring structures in the distance monitoring unit change, and the payment information monitoring unit detects that the order for the corresponding fuel nozzle is in an unpaid state, the alarm unit responds to the above signal and issues an alarm message.

[0018] The present invention also provides a method that, compared with the prior art, has, but is not limited to, the following beneficial effects: The payment information monitoring unit monitors whether the corresponding fuel dispenser order is in an unpaid state. If so, when the sensing distance detected by all distance monitoring structures in the distance monitoring unit changes, it is considered that the corresponding fuel vehicle is in a moving state and may be attempting to evade payment. This triggers the alarm unit to respond to the above signal and issue an alarm message. This method is more convenient than manual judgment and can judge all fuel dispensers in the same gas station, saving a lot of manpower while also improving the accuracy of the judgment. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the control method flowchart structure in this invention; Figure 2 This is a top view schematic diagram of the distance monitoring structure installed on the refueling machine in this invention; Figure 3 This is a block diagram of the control system in this invention.

[0021] In the diagram: 1. Distance monitoring unit; 11. Distance monitoring structure; 2. Fuel dispenser; 3. Fuel nozzle position detection unit; 4. Alarm unit; 5. Payment information monitoring unit; 6. Closed fuel line unit. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0023] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the specification, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, components, or groups of features, integers, steps, or components.

[0027] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0028] like Figure 2 and 3 As shown, a device for preventing vehicles from pulling fuel hoses and evading payment at gas stations includes n distance monitoring units 1, the number of which corresponds to the number of fuel dispensers 2. Each distance monitoring unit 1 has at least two distance monitoring structures 11, which are used to monitor changes in the sensing distance when a vehicle stops at the corresponding fuel dispenser 2. It also includes n fuel nozzle position detection units 3, used to detect whether the corresponding fuel nozzle is being removed from the fuel dispenser 2. Furthermore, it includes an alarm unit 4, used to issue alarm information at different fuel dispensers 2. The distance monitoring units 1, fuel nozzle position detection units 3, and alarm unit 4 are configured such that when a fuel nozzle position detection unit 3 detects that a fuel nozzle is being removed from the fuel dispenser 2, and the sensing distance detected by all distance monitoring structures 11 in the distance monitoring units 1 at the same fuel dispenser 2 changes, the alarm unit 4 responds to the signal and issues an alarm.

[0029] In this embodiment, the distance monitoring unit 1 can have multiple sets of distance monitoring structures 11. Each set of distance monitoring structures 11 can monitor vehicles at the same fuel dispenser 2, determining whether the vehicle is stationary or moving. The fuel nozzle position detection unit 3 detects the position of the fuel nozzle to determine if there is a possibility of hose pulling. When the fuel nozzle position detection unit 3 detects that the fuel nozzle is in a removed state, i.e., a possible refueling state, and the corresponding distance monitoring structure 11 in the distance monitoring unit 1 detects that a refueling vehicle near the fuel dispenser 2 is in a possible moving state, a signal is sent to the alarm unit 4. The alarm unit 4 responds to the signal and issues an alarm message. In this scheme, all distance monitoring structures 11 used to identify the parking state of the refueling vehicle at the fuel dispenser 2 detect a change in sensing distance before the alarm unit 4 issues an alarm message, which can maximize the avoidance of false alarms and missed alarms. With the above scheme, it is not necessary to continuously observe the refueling vehicles at each fuel dispenser 2 manually. Instead, it is only necessary to determine whether there is a vehicle that may be pulling the fuel nozzle based on the alarm message. This scheme saves manpower and has high accuracy.

[0030] Optionally, the distance monitoring structure 11 has an accuracy value in the millimeter range.

[0031] In this embodiment, the accuracy of the distance monitoring structure 11 is set to the millimeter level. A distance change that can be detected at the millimeter level is within 1-10 mm. Since the vehicle body shell is mostly curved, distance changes are inevitable when the vehicle moves. Using this accuracy can effectively improve the accuracy and immediacy of vehicle status identification. Exemplarily, the distance monitoring structure 11 can be implemented as a distance sensor.

[0032] like Figure 2 As shown, optionally, the distance monitoring structure 11 has no less than four and is arranged along the width direction of the fuel dispenser 2. It is located at the location where the vehicle is parked at the corresponding fuel dispenser 2 and fixed on the fuel dispenser 2, and the sensing area matches the corresponding vehicle parking position.

[0033] In this embodiment, the distance monitoring structure 11 can be set on the refueling machine 2 in the corresponding monitoring area and arranged along the width direction. It can match the state when the vehicle is parked and is used to facilitate the positioning and monitoring of multiple positions on the vehicle body, so as to facilitate the judgment of the vehicle's parking status.

[0034] like Figure 2 As shown, optionally, the projection of the monitoring lines of the two outermost distance monitoring structures 11 on the horizontal plane is inclined to the mounting surface of the fuel dispenser 2, and the monitoring lines generated by all distance monitoring structures 11 in the same distance monitoring unit 1 do not intersect within the formed monitoring area.

[0035] In this embodiment, the monitoring line refers to the line connecting the center point of the detection source on the distance monitoring structure 11 to the center point of the area that can be sensed. The monitoring lines of the two outermost distance monitoring structures 11 are tilted to the mounting surface of the fuel dispenser 2, which can increase the distance between the monitoring areas corresponding to the two distance monitoring structures 11. At the same time, space is left for the monitoring position of the possible distance monitoring structure 11 in the middle of the fuel dispenser 2. It also ensures that the monitoring lines generated by all distance monitoring structures 11 in the same distance monitoring unit 1 do not cross within the formed monitoring area. This can avoid the problem of large-area overlap of the areas monitored by the distance monitoring structures 11, and also avoid the problem of the monitoring position of the distance monitoring structure 11 being set too far away unnecessarily, resulting in a long feedback signal time.

[0036] Optionally, the alarm unit 4 is configured to respond to the above signal and issue an alarm message only when the fuel nozzle position detection unit 3 detects that the fuel nozzle is removed from the fuel dispenser 2 and the sensing distance detected by all distance monitoring structures 11 in the corresponding distance monitoring unit 1 increases.

[0037] In this embodiment, when the distance monitoring structure 11 detects that the sensing distance has decreased, it may be because a person or object has passed between the distance monitoring structure 11 and the corresponding monitoring vehicle, causing the signal to be blocked, thus reducing the sensing distance. To avoid false alarms, the alarm unit 4 will only respond to the above signal and issue an alarm message when the sensing distance detected by all distance monitoring structures 11 has increased, thereby improving the accuracy of the alarm.

[0038] like Figure 1 As shown, optionally, it also includes a payment information monitoring unit 5, used to monitor whether the order of the fuel nozzle is in an unpaid state. The distance monitoring unit 1, the alarm unit 4 and the payment information monitoring unit 5 are configured such that when the sensing distance detected by all distance monitoring structures 11 in the distance monitoring unit 1 changes, and the payment information monitoring unit 5 detects that the order of the corresponding fuel nozzle is in an unpaid state, the alarm unit 4 responds to the above signal and issues an alarm message.

[0039] In this embodiment, the payment information monitoring unit 5 can query the order status corresponding to the current fuel dispenser 2 to determine whether it is in a paid or unpaid state, in order to determine whether the driver has paid. When the sensing distance detected by all distance monitoring structures 11 in the distance monitoring unit 1 changes, it indicates that the vehicle is considered to be in motion. If the payment information monitoring unit 5 detects that the order of the corresponding fuel dispenser is in an unpaid state, it is considered that the driver has evaded payment. The alarm unit 4 responds to the above signal and issues an alarm message to prevent the driver from evading payment. This solution also does not require manual observation and judgment, and is fully automated in monitoring. It is convenient to use and has a high accuracy rate.

[0040] like Figure 1 As shown, optionally, the alarm unit 4 is configured to have a first alarm message and a second alarm message. When the fuel nozzle position detection unit 3 detects that the fuel nozzle is being removed from the fuel dispenser 2, and the sensing distance detected by all distance monitoring structures 11 in the corresponding distance monitoring unit 1 changes, the alarm unit 4 issues the first alarm message. When the sensing distance detected by all distance monitoring structures 11 in the distance monitoring unit 1 changes, and the payment information monitoring unit 5 detects that the order for the corresponding fuel nozzle is in an unpaid state, the alarm unit 4 issues the second alarm message.

[0041] In this embodiment, the alarm information of alarm unit 4 is divided into first alarm information and second alarm information to match different states. For example, the situation of pulling the hose can be considered more serious than the situation of skipping out on a bill. Therefore, the intensity and severity of the first alarm information are set to be greater than the intensity and severity of the second alarm information. Alarm unit 4 may include a sound alarm structure and a light alarm structure. Changes in intensity and severity may include changes in sound loudness, sound frequency, light brightness, and light flashing frequency. It is understood that alarm unit 4 can also issue the first alarm information and the second alarm information simultaneously. When skipping out on a bill and pulling the hose may occur simultaneously, alarm unit 4 can issue both alarm information at the same time. For example, alarm unit 4 may include multiple speakers. When alarm unit 4 needs to issue the first alarm information and the second alarm information simultaneously, at least one speaker issues the first alarm information and at least one speaker issues the second alarm information; alternatively, all speakers issue the first alarm information first, and then issue the second alarm information.

[0042] like Figure 1 As shown, optionally, it also includes a closed oil circuit unit 6, which is used to control the opening and closing state of the submersible pump and solenoid valve connected to the oil pipeline. When the oil nozzle position detection unit 3 detects that the oil nozzle is in the state of being removed from the oil dispenser 2, and the sensing distance detected by all distance monitoring structures 11 in the corresponding distance monitoring unit 1 changes, the closed oil circuit unit 6 responds to the above signal and closes the submersible pump and solenoid valve connected to the corresponding oil nozzle.

[0043] In this embodiment, when there is a possibility of the oil pipe being pulled, the submersible pump and solenoid valve on the fuel dispenser 2 that is likely to be pulled can be shut off by the oil circuit unit 6 to prevent the oil from continuing to flow out, thereby reducing the probability of the oil being ignited by the sparks generated during the pulling.

[0044] In one method, when the fuel nozzle position detection unit 3 detects that the fuel nozzle is removed from the fuel dispenser 2 and the sensing distance detected by all distance monitoring structures 11 in the corresponding distance monitoring unit 1 changes, the alarm unit 4 responds to the above signal and issues an alarm message.

[0045] In this embodiment, by causing all the sensing distances detected by the distance monitoring structures 11 to change, it is confirmed that the vehicle is indeed in a moving state. Then, when the corresponding fuel nozzle is in the state of being removed from the fuel dispenser 2, it is determined that there may be a pulling of the fuel hose, so that the alarm unit 4 responds to the above signal and issues an alarm message. This method can effectively save manpower and improve the accuracy of judgment.

[0046] In one method, when the sensing distances detected by all distance monitoring structures 11 in the distance monitoring unit 1 change, and the payment information monitoring unit 5 detects that the order for the corresponding refueling nozzle is in an unpaid state, the alarm unit 4 responds to the above signal and issues an alarm message.

[0047] In this embodiment, the payment information monitoring unit 5 monitors whether the order of the corresponding refueling nozzle is in an unpaid state. If so, when the sensing distance detected by all distance monitoring structures 11 in the distance monitoring unit 1 changes, it is considered that the corresponding refueling vehicle is in a moving state and may evade payment. The alarm unit 4 responds to the above signal and issues an alarm message. This method is more convenient than manual judgment and can judge all refueling machines 2 in the same gas station, saving a lot of manpower and making the judgment more accurate.

[0048] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A device for preventing vehicles from pulling fuel hoses and evading payment at gas stations, characterized in that, The system includes n distance monitoring units (1), the number of which corresponds to the number of fuel dispensers (2). Each distance monitoring unit (1) has at least two distance monitoring structures (11), which are used to monitor the change in sensing distance when a vehicle stops at the corresponding fuel dispenser (2). The system also includes n fuel nozzle position detection units (3), which are used to detect whether the corresponding fuel nozzle is removed from the fuel dispenser (2). The system also includes an alarm unit (4), which is used to issue alarm information at different fuel dispensers (2). The distance monitoring unit (1), fuel nozzle position detection unit (3), and alarm unit (4) are configured such that when the fuel nozzle position detection unit (3) detects that the fuel nozzle is removed from the fuel dispenser (2), the sensing distance detected by all distance monitoring structures (11) in the distance monitoring unit (1) at the same fuel dispenser (2) as the fuel nozzle changes, the alarm unit (4) responds to the above signal and issues an alarm information.

2. The device for preventing vehicles from pulling fuel hoses and evading payment at gas stations according to claim 1, characterized in that, The distance monitoring structure (11) has an accuracy value in the millimeter range.

3. The device for preventing vehicles from pulling fuel hoses and evading payment at gas stations according to claim 1, characterized in that, The distance monitoring structure (11) has no fewer than four and is arranged along the width direction of the fuel dispenser (2). It is located at the location where the vehicle is parked at the corresponding fuel dispenser (2) and fixed on the fuel dispenser (2), and the sensing area matches the corresponding vehicle parking position.

4. A device for preventing vehicles from pulling fuel hoses and evading payment at gas stations according to claim 1, characterized in that, The projection of the monitoring lines of the two outermost distance monitoring structures (11) on the horizontal plane is inclined to the mounting surface of the fuel dispenser (2), and the monitoring lines generated by all distance monitoring structures (11) in the same distance monitoring unit (1) do not intersect within the formed monitoring area.

5. A device for preventing vehicles from pulling fuel lines and evading payment at gas stations according to claim 1, characterized in that, The alarm unit (4) is configured to respond to the above signal and issue an alarm message only when the fuel nozzle position detection unit (3) detects that the fuel nozzle is removed from the fuel dispenser (2) and the sensing distance detected by all distance monitoring structures (11) in the corresponding distance monitoring unit (1) increases.

6. A device for preventing vehicles from pulling fuel lines and evading payment at gas stations according to claim 1, characterized in that, It also includes a payment information monitoring unit (5) for monitoring whether the order of the fuel nozzle is in an unpaid state. The distance monitoring unit (1), alarm unit (4) and payment information monitoring unit (5) are configured such that when the sensing distance detected by all distance monitoring structures (11) in the distance monitoring unit (1) changes, and the payment information monitoring unit (5) detects that the order of the corresponding fuel nozzle is in an unpaid state, the alarm unit (4) responds to the above signal and issues an alarm message.

7. A device for preventing vehicles from pulling fuel lines and evading payment at gas stations according to claim 6, characterized in that, The alarm unit (4) is configured to have a first alarm message and a second alarm message. When the fuel nozzle position detection unit (3) detects that the fuel nozzle is removed from the fuel dispenser (2), and the sensing distance detected by all distance monitoring structures (11) in the corresponding distance monitoring unit (1) changes, the alarm unit (4) issues the first alarm message. When the sensing distance detected by all distance monitoring structures (11) in the distance monitoring unit (1) changes, and the payment information monitoring unit (5) detects that the order of the corresponding fuel nozzle is in an unpaid state, the alarm unit (4) issues the second alarm message.

8. A device for preventing vehicles from pulling fuel lines and evading payment at gas stations according to claim 1, characterized in that, It also includes a closed oil circuit unit (6) for controlling the opening and closing status of the submersible pump and solenoid valve connected to the oil pipeline. When the oil nozzle position detection unit (3) detects that the oil nozzle is removed from the oil dispenser (2) and the sensing distance detected by all distance monitoring structures (11) in the corresponding distance monitoring unit (1) changes, the closed oil circuit unit (6) responds to the above signal and closes the submersible pump and solenoid valve connected to the corresponding oil nozzle.

9. A method, based on a gas station device for preventing vehicles from pulling fuel hoses and evading payment as described in any one of claims 1-8, characterized in that, When the fuel nozzle position detection unit (3) detects that the fuel nozzle is removed from the fuel dispenser (2) and the sensing distance detected by all distance monitoring structures (11) in the corresponding distance monitoring unit (1) changes, the alarm unit (4) responds to the above signal and issues an alarm message.

10. A method, based on a gas station device for preventing vehicles from pulling fuel hoses and evading payment as described in any one of claims 1-8, characterized in that, When the sensing distance detected by all distance monitoring structures (11) in the distance monitoring unit (1) changes, and the payment information monitoring unit (5) detects that the order of the corresponding fuel nozzle is in an unpaid state, the alarm unit (4) responds to the above signal and issues an alarm message.

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