A method for securing a fuel dispenser

Abstract

The application relates to a safety protection method of a refueling machine, and belongs to the technical field of refueling machines. The steps of the application are closely connected, and form an efficient, comprehensive and rapid abnormality detection and response process. From preliminary monitoring of acceleration to double confirmation of a rotation angle, each step provides reliable data support for the subsequent step, ensures that the system can accurately identify the abnormality of the refueling machine in the shortest time, effectively deals with various emergency situations such as collision, pulling and sinking that the refueling machine may encounter in the use process, and ensures the safety and stability of the refueling process. Through accurate monitoring and rapid response, the system can effectively prevent fuel leakage and equipment damage.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil dispensers, and particularly relates to a safety protection method for an oil dispenser. BACKGROUND

[0002] Currently, an emergency cut-off valve and an emergency pull-off valve are used in an oil dispenser to prevent the oil dispenser from being tilted and causing fuel leakage due to collision or pulling caused by a vehicle. The emergency cut-off valve is installed at the bottom of the oil dispenser. When the oil dispenser is tilted, the emergency cut-off valve is cut off, and the upper and lower valve bodies are separated. The upper and lower valve bodies each have a valve cover to close one end of the oil dispenser and one end of a pipeline, so that the gasoline is closed, the fuel at both ends is effectively stored, and further oil spill is prevented, thereby minimizing the risk of flammability. The cut-off torque of the cut-off ring groove is 350-550 Nm.

[0003] The emergency cut-off valve and the emergency pull-off valve work when they are subjected to severe collision or pulling. When the emergency cut-off valve is subjected to a torque less than 350 Nm, or the emergency pull-off valve is subjected to a pulling force less than 800 N, they do not work, but at this time, the oil dispenser may have been tilted and deformed, and the oil line may be damaged to cause fuel leakage and risk.

[0004] During use, the oil dispenser may be subjected to external forces to cause tilting, pulling, collision, and sinking. Most of these situations are caused by 1, improper operation of the driver or out-of-control vehicle, causing the oil dispenser to be subjected to collision or pulling by the vehicle or other external forces, resulting in tilting of the machine; 2, natural causes such as settlement of the ground on which the oil dispenser is installed, strong wind, etc. cause tilting. When these problems occur, if the emergency cut-off valve or the emergency pull-off valve does not trigger in time, there may be a risk of fuel leakage. Based on the above, there are many situations of safety accidents of the oil dispenser, and a simple mechanical protection structure cannot comprehensively protect the oil dispenser from various situations and timely remind the user.

[0005] Therefore, there is an urgent need for a comprehensive and timely safety protection method for an oil dispenser. SUMMARY

[0006] To solve the above problems in the prior art, the present application provides a safety protection method for an oil dispenser, which solves the problem of incomplete safety protection of the existing oil dispenser.

[0007] The object of the present application can be achieved by the following technical solutions:

[0008] A safety protection method for an oil dispenser, which is suitable for an oil dispenser and comprises a first inclination gyroscope sensor and a second inclination gyroscope sensor arranged in the oil dispenser.

[0009] S1: the master control system monitors and calculates the measured value B1 of the first tilt angle gyroscope sensor, compares the measured value B1 with the set threshold value A1, and judges whether the measured value B1 exceeds the threshold value A1;

[0010] S2: if the measured value B1 exceeds the threshold value A1, the measured value C1 of the second tilt angle gyroscope sensor is compared with the threshold value A1, and it is judged whether the measured value C1 exceeds the threshold value A1;

[0011] S3: if the measured value C1 exceeds the threshold value A1, the measured value B2 of the first tilt angle gyroscope sensor is monitored and calculated, the measured value B2 is compared with the set threshold value A2, and it is judged whether the measured value B2 exceeds the threshold value A2;

[0012] S4: if the measured value B2 exceeds the threshold value A2, the measured value C2 of the second tilt angle gyroscope sensor is compared with the threshold value A2, and it is judged whether the measured value C2 exceeds the threshold value A2;

[0013] S5: if the measured value C2 exceeds the threshold value A2, a safety accident occurs in the oil dispenser, and the master control system sends a closing instruction to the oil pump and the electromagnetic valve; the measured values B1 and C1 represent the acceleration of the first tilt angle gyroscope sensor and the second tilt angle gyroscope sensor respectively; the measured values B2 and C2 represent the rotation angle of the first tilt angle gyroscope sensor and the second tilt angle gyroscope sensor respectively; the threshold value A1 represents the acceleration threshold value, and the threshold value A2 represents the rotation angle threshold value.

[0014] Preferably, for the S1:

[0015] S101: if the measured value B1 does not exceed the threshold value A1, the measured value C1 is compared with the threshold value A1;

[0016] S102: if the measured value C1 exceeds the threshold value A1; or for the S2: if the measured value C1 does not exceed the threshold value A1, the master control system sends an alarm instruction to the alarm unit provided in the oil dispenser, and the alarm unit issues a yellow alarm according to the instruction of the master control system.

[0017] Preferably, for the S3:

[0018] S301: if the measured value B2 does not exceed the threshold value A2, the measured value C2 is compared with the threshold value A2;

[0019] S302: if the measured value C2 exceeds the threshold value A2; or for the S4: if the measured value C2 does not exceed the threshold value A2, the master control system sends an alarm instruction to the alarm unit, and the alarm unit issues an orange alarm according to the instruction of the master control system; the master control system also sends a closing instruction to the oil pump and the electromagnetic valve.

[0020] Preferably, for the S301, if the measured value C2 does not exceed the threshold value A2, the master control system sends an alarm instruction to the alarm unit, and the alarm unit sends a yellow alarm according to the instruction of the master control system, and the master control system sends a closing instruction to the oil pump and the electromagnetic valve.

[0021] Preferably, in the S101:

[0022] S103: if the measured value C1 does not exceed the threshold value A1, the measured value B2 is compared with the threshold value A2;

[0023] S104: if the measured value B2 does not exceed the threshold value A2, the measured value C2 is compared with the threshold value A2;

[0024] S105: if the measured value C2 does not exceed the threshold value A2, the data monitored by the master control system is normal, and it is judged that the refueling machine is in a normal state.

[0025] Preferably, for the S103:

[0026] S1031: if the measured value B2 exceeds the threshold value A2, the measured value C2 is compared with the threshold value A2;

[0027] S1032: if the measured value C2 exceeds the threshold value A2, the master control system sends an alarm instruction to the alarm unit, and the alarm unit sends an orange alarm according to the instruction of the master control system.

[0028] Preferably, for the S1031, the measured value C2 does not exceed the threshold value A2, and for the S104, the measured value C2 exceeds the threshold value A2; the master control system sends an alarm instruction to the alarm unit, and the alarm unit sends a yellow instruction according to the instruction of the master control system.

[0029] Preferably, the acceleration data and the rotation angle data each include data of X-axis, Y-axis and Z-axis.

[0030] The present application has the following beneficial effects:

[0031] 1. The steps of the present application are closely connected, forming an efficient, comprehensive and rapid abnormal detection and response process; from the preliminary monitoring of acceleration to the double confirmation of rotation angle, each step provides reliable data support for the subsequent step, ensuring that the system can accurately identify the abnormal condition of the refueling machine in the shortest time, effectively dealing with various emergency situations such as collision, pulling and sinking that the refueling machine may encounter during use, ensuring the safety and stability of the refueling process, and preventing fuel leakage and equipment damage through accurate monitoring and rapid response.

[0032] 2、The present application not only focuses on the acceleration change of the refueling machine, but also identifies various abnormal conditions such as pulling and sinking by monitoring the rotation angle, so that the comprehensive monitoring method enables the system to more accurately evaluate the working state of the refueling machine, so that more accurate safety measures can be taken. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to facilitate those skilled in the art to understand, the present application will be further described below in conjunction with the drawings.

[0034] Figure 1 The safety protection logic diagram provided by the present application in an embodiment;

[0035] Figure 2 The first and second inclination gyro sensor installation front view structure schematic diagram provided by the present application in an embodiment;

[0036] Figure 3 The first and second inclination gyro sensor installation side view structure schematic diagram provided by the present application in an embodiment;

[0037] Figure 4 The first and second inclination gyro sensor installation top view structure schematic diagram provided by the present application in an embodiment; DETAILED DESCRIPTION

[0038] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the specific embodiments, structures, features and effects according to the present application are described in detail below in conjunction with the drawings and preferred embodiments.

[0039] As shown in Figures 1-4 A safety protection method for a refueling machine, suitable for a refueling machine, comprising a first inclination gyro sensor and a second inclination gyro sensor arranged in the refueling machine; the first and second inclination gyro sensors are respectively installed at different positions (such as front and back or left and right sides) of the refueling machine, for measuring the acceleration and rotation angle change of the refueling machine to monitor the movement state of the refueling machine;

[0040] S1: The main control system monitors and calculates the measurement value B1 of the first inclination gyro sensor, and compares the measurement value B1 with the set threshold value A1 to determine whether the measurement value B1 exceeds the threshold value A1; this step is the starting point of the protection response, which can preliminarily screen possible abnormal conditions, reduce the false positive rate, and provide basic data for subsequent judgment;

[0041] S2: If the measured value B1 exceeds the threshold value A1, compare the measured value C1 of the second tilt angle gyroscope sensor with the threshold value A1, and determine whether the measured value C1 exceeds the threshold value A1; if B1 exceeds the threshold value A1, the system further acquires the measured value C1 of the second tilt angle gyroscope sensor, and performs the same comparison. The double confirmation mechanism improves the reliability of the judgment, avoids the misoperation caused by single sensor failure or misjudgment, and through double confirmation, the system can more accurately identify the real abnormal situation, providing a solid basis for subsequent safety protection;

[0042] S3: If the measured value C1 exceeds the threshold value A1, monitor and calculate the measured value B2 of the first tilt angle gyroscope sensor, and compare the measured value B2 with the set threshold value A2 to determine whether the measured value B2 exceeds the threshold value A2; after confirming the acceleration anomaly, the system starts to monitor the rotation angle change (i.e. measured value B2) of the first tilt angle gyroscope sensor, and compares it with the set rotation angle threshold A2, aiming to identify whether the refueling machine has abnormal rotation due to pulling or sinking; further refining the judgment of abnormal situation, through monitoring the rotation angle change, the system can more comprehensively evaluate the motion state of the refueling machine, providing a basis for taking more accurate safety measures.

[0043] S4: If the measured value B2 exceeds the threshold value A2, compare the measured value C2 of the second tilt angle gyroscope sensor with the threshold value A2, and determine whether the measured value C2 exceeds the threshold value A2; similar to the double confirmation of acceleration, if B2 exceeds the threshold value A2, the system again acquires the rotation angle measured value C2 of the second tilt angle gyroscope sensor, and performs comparison; double confirmation ensures the accuracy and reliability of the rotation angle abnormality judgment; through double confirmation of rotation angle abnormality, the system can be more confident that the refueling machine is indeed in an unsafe state, thereby triggering the emergency shutdown program to prevent the situation from further deteriorating;

[0044] S5: If the measured value C2 exceeds the threshold value A2, the refueling machine has a safety accident, and the main control system sends a shutdown instruction to the oil pump and the electromagnetic valve; the measured values B1 and C1 represent the accelerations of the first and second tilt angle gyroscope sensors respectively; the measured values B2 and C2 represent the rotation angles of the first and second tilt angle gyroscope sensors respectively; the threshold value A1 represents the acceleration threshold, and the threshold value A2 represents the rotation angle threshold; when the measured value C2 also exceeds the threshold value A2, the main control system determines that the refueling machine has a safety accident (such as a serious collision, pulling or sinking), and immediately sends a shutdown instruction to the oil pump and the electromagnetic valve, and the electromagnetic valve quickly cuts off the fuel supply path to prevent fuel from continuing to flow out; the start of the emergency shutdown program is the final link of the system response, and is also a key step to ensure safety, by quickly cutting off the fuel supply, the system effectively prevents the serious consequences of fuel leakage;

[0045] B1 includes Δa X1 , ΔaY1 , Δa Z1 ; B2 includes Δθ X1 , Δθ Y1 , Δθ Z1 ; C1 includes Δa X2 , Δa Y2 , Δa Z2 ; C2 includes Δθ X2 , Δθ Y2 , Δθ Z2 ; wherein Δθ X1 = |θ X1 - θ X10 |; Δθ Y1 = |θ Y1 - θ Y10 |; Δθ Z1 = |θ Z1 - θ Z10 |; Δa X1 = |a X1 - a X10 |; Δa Y1 = |a Y1 - a Y10 |; Δa Z1 = |a Z1 - a Z10 |; Δθ X2 = |θ X2 - θ X20 |; Δθ Y2 = |θ Y2 - θ Y20 |; Δθ Z2 = |θ Z2 - θ Z20 |; Δa X2 = |a X2 - a X20 |; Δa Y2 = |a Y2 - a Y20 |; Δa Z2 = |a Z2 - a Z20 |;

[0046] θ X1 is a first tilt gyro sensor rotation angle measurement about the X axis; θ Y1 is a first tilt gyro sensor rotation angle measurement about the Y axis; θ Z1 is a first tilt gyro sensor rotation angle measurement about the Z axis; a X1 is a first tilt gyro sensor X axis direction acceleration measurement; a Y1 is a first tilt gyro sensor Y axis direction acceleration measurement; a Z1is the acceleration measured value of the Z-axis direction of the first tilt gyroscope sensor; the measured values of the axes of the second tilt gyroscope sensor are named in the same way, and will not be described again; θ X10 is the factory-set value of the rotation angle of the X-axis direction of the first tilt gyroscope sensor; θ Y10 is the factory-set value of the rotation angle of the Y-axis direction of the first tilt gyroscope sensor; θ Z10 is the factory-set value of the rotation angle of the Z-axis direction of the first tilt gyroscope sensor; a X10 is the factory-set value of the acceleration of the X-axis direction of the first tilt gyroscope sensor; a Y10 is the factory-set value of the acceleration of the Y-axis direction of the first tilt gyroscope sensor; a Z10 is the factory-set value of the acceleration of the Z-axis direction of the first tilt gyroscope sensor; θ X20 is the factory-set value of the rotation angle of the X-axis direction of the second tilt gyroscope sensor; θ Y20 is the factory-set value of the rotation angle of the Y-axis direction of the second tilt gyroscope sensor; θ Z20 is the factory-set value of the rotation angle of the Z-axis direction of the second tilt gyroscope sensor; a X20 is the factory-set value of the acceleration of the X-axis direction of the second tilt gyroscope sensor; a Y20 is the factory-set value of the acceleration of the Y-axis direction of the second tilt gyroscope sensor; a Z20 is the factory-set value of the acceleration of the Z-axis direction of the second tilt gyroscope sensor; θ X10 = 0, θ Y10 = 0, θ Z10 = 0, a X10 = 0, a Y10 = 0, a Z10 = 0, θ X20 = 0, θ Y20 = 0, θ Z20 = 0, a X20 = 0, a Y20 = 0, a Z20 = 0.

[0047] In summary, the steps are closely linked, forming an efficient and accurate abnormal detection and response process. From the initial monitoring of acceleration to the double confirmation of rotation angle, each step provides reliable data support for the subsequent step, ensuring that the system can accurately identify the abnormal situation of the fuel dispenser in the shortest time; the double sensor confirmation mechanism is an important guarantee for system reliability. Whether it is acceleration or rotation angle monitoring, two independent tilt gyro sensors are used for measurement, and double confirmation is performed by the main control system, effectively reducing the impact of single sensor failure or misjudgment on the overall performance of the system, improving the stability and reliability of the system; In addition to focusing on the acceleration change of the fuel dispenser, the rotation angle is also monitored to identify various abnormal conditions such as pulling and sinking. This comprehensive monitoring method enables the system to more accurately assess the motion state of the fuel dispenser, thereby taking more precise safety measures; by setting multiple thresholds and using a double confirmation mechanism, the system effectively reduces the likelihood of false positives and false negatives. Only when the measurement values of the two sensors both exceed the corresponding threshold, the system will determine that there is an abnormal situation and start the emergency shutdown program; it not only ensures the sensitivity of the system, but also avoids wasting resources due to false positives; at the same time, it not only improves the safety protection level of the fuel dispenser, but also provides strong support for the safety management and maintenance of the gas station; through real-time monitoring and data analysis, management personnel can timely understand the running state and potential risks of the fuel dispenser

[0048] In an embodiment, for S1:

[0049] S101: If the measurement value B1 does not exceed the threshold A1, compare the measurement value C1 with the threshold A1; this step is to further confirm the second sensor (C1) after initially determining that the fuel dispenser is not subjected to significant external forces (i.e. B1 does not exceed A1), this design aims to improve the robustness of the system, prevent misjudgment caused by single sensor failure or error; only when the data of the two sensors are both abnormal, the system will consider that there is a potential risk, thereby reducing the possibility of false positives.

[0050] S102: If the measurement value C1 exceeds the threshold A1; or for S2: If the measurement value C1 does not exceed the threshold A1, the main control system sends an alarm instruction to the alarm unit provided for the fuel dispenser, and the alarm unit issues a yellow alarm according to the instruction of the main control system; as long as the data of one sensor is abnormal, the fuel dispenser may have an abnormal situation, only an alarm needs to be sent to remind the staff to maintain, without the need to shut down the oil pump, affecting the normal work of the fuel dispenser, based on the principle of early warning mechanism, that is, before the potential risk develops into an actual accident, an alarm is issued to remind relevant personnel to take preventive measures, which can reduce or avoid accidents.

[0051] In an embodiment, for S3:

[0052] S301: If the measurement value B2 does not exceed the threshold value A2, compare the measurement value C2 with the threshold value A2;

[0053] S302: If the measurement value C2 exceeds the threshold value A2, the system considers that there may be an abnormal situation; or for S4: If the measurement value C2 does not exceed the threshold value A2, although the measurement value of C2 does not exceed the threshold value A2, since there is an abnormal situation of data in the S4 step, and both sensors detect that the acceleration and the rotation angle are abnormal, at this time the host system sends an alarm instruction to the alarm unit, and the alarm unit sends an orange alarm according to the instruction of the host system, aiming to remind the operator to pay attention and take corresponding measures; the host system also sends a closing instruction to the oil pump and the electromagnetic valve; through the multi-step confirmation and evaluation process, the system ensures accurate judgment and timely response to abnormal situations. This not only improves the safety and reliability of the system, but also reduces the possibility of false positives and false negatives. By starting the emergency response program, sending an alarm, closing the oil pump and electromagnetic valve, and notifying relevant personnel, the system can control potential risks and reduce losses in the shortest time.

[0054] In an embodiment, for S301, if the measurement value C2 does not exceed the threshold value A2, the host system sends an alarm instruction to the alarm unit, and the alarm unit sends a yellow alarm according to the instruction of the host system, and the host system sends a closing instruction to the oil pump and the electromagnetic valve; the internal logic judgment and data analysis in step S301 provide more comprehensive information support, which helps to make reasonable decisions, and in emergency situations, this can significantly improve the response speed and disposal efficiency. The system not only relies on the threshold value of a single parameter to trigger the alarm and closing instruction, but also conducts comprehensive evaluation combining multiple factors; this preventive maintenance strategy helps to discover potential problems in advance and take measures to solve them, thereby prolonging the service life of the equipment and reducing maintenance costs.

[0055] In an embodiment, in S101:

[0056] S103: If the measurement value C1 does not exceed the threshold value A1, compare the measurement value B2 with the threshold value A2;

[0057] S104: If the measurement value B2 does not exceed the threshold value A2, compare the measurement value C2 with the threshold value A2;

[0058] S105: If the measurement value C2 does not exceed the threshold value A2, the data monitored by the host system is normal, and the host system judges that the fuel dispenser is in a normal state;

[0059] According to the monitoring of the acceleration and rotation angle of the first and second inclination gyro sensors, the host system judges that the fuel dispenser is in a normal state only when all the data are normal, ensuring the normal operation of the fuel dispenser.

[0060] In an embodiment, for S103:

[0061] S1031: if the measurement value B2 exceeds the threshold value A2, compare the measurement value C2 with the threshold value A2;

[0062] S1032: if the measurement value C2 exceeds the threshold value A2, the master system sends an alarm instruction to the alarm unit, and the alarm unit issues an orange alarm according to the instruction of the master system.

[0063] In an embodiment, for S1031 the measurement value C2 does not exceed the threshold value A2 and for S104 the measurement value C2 exceeds the threshold value A2; the master system sends an alarm instruction to the alarm unit, and the alarm unit issues a yellow alarm according to the instruction of the master system, which is a refueling machine.

[0064] In an embodiment, the acceleration data and the rotation angle data include data of each of the X-axis, the Y-axis, and the Z-axis; the data of a single axis can only reflect the state of the refueling machine in a certain direction, while ignoring the changes in other directions. For example, only through the X-axis data, it may not be able to accurately determine whether the refueling machine has occurred lateral tilt or forward and backward pull. While the multi-dimensional data can comprehensively reflect the overall motion state of the refueling machine, thereby avoiding missing important information; by simultaneously monitoring the data of the X-axis, the Y-axis, and the Z-axis, the system can capture the small changes of the refueling machine in each direction. This multi-dimensional data enables the system to more accurately determine the motion state of the refueling machine, and through the comprehensive analysis of the acceleration data and the rotation angle data, the system can construct the complete motion state of the refueling machine in three-dimensional space; this multi-dimensional comprehensive analysis enables the system to more accurately determine whether the refueling machine has occurred collision, tilt, pull, and the like, when the system can quickly and accurately determine the motion state of the refueling machine, it can respond faster, for example, when detecting that the refueling machine has occurred collision or tilt, the system can immediately start the protection mechanism, such as closing the oil pump and the electromagnetic valve, to prevent potential dangers such as fuel leakage. This fast response capability helps to reduce the possibility of accidents and losses.

[0065] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments made according to the technical essence of the present application, without departing from the technical solution of the present application, are still within the scope of the technical solution of the present application.

Claims

1. A method of securing a fuel dispenser, suitable for use with a fuel dispenser, comprising: The first and second inclination gyro sensors are arranged in the refueling machine, characterized in that S1: the main control system monitors and calculates the measurement value B1 of the first inclination gyro sensor, compares the measurement value B1 with the set threshold value A1, and judges whether the measurement value B1 exceeds the threshold value A1; S2: if the measurement value B1 exceeds the threshold value A1, the measurement value C1 of the second inclination gyro sensor is compared with the threshold value A1, and whether the measurement value C1 exceeds the threshold value A1 is judged; S3: if the measurement value C1 exceeds the threshold value A1, the measurement value B2 of the first inclination gyro sensor is monitored and calculated, the measurement value B2 is compared with the set threshold value A2, and whether the measurement value B2 exceeds the threshold value A2 is judged; S4: if the measurement value B2 exceeds the threshold value A2, the measurement value C2 of the second inclination gyro sensor is compared with the threshold value A2, and whether the measurement value C2 exceeds the threshold value A2 is judged; S5: if the measurement value C2 exceeds the threshold value A2, the refueling machine has a safety accident, and the main control system sends a closing instruction to the oil pump and the electromagnetic valve. The measurement values B1 and C1 represent the accelerations of the first and second inclination gyro sensors respectively; the measurement values B2 and C2 represent the rotation angles of the first and second inclination gyro sensors respectively; the threshold value A1 represents the acceleration threshold value, and the threshold value A2 represents the rotation angle threshold value.

2. The method of claim 1, wherein the method further comprises: For the S1: S101: if the measurement value B1 does not exceed the threshold value A1, the measurement value C1 is compared with the threshold value A1; S102: if the measurement value C1 exceeds the threshold value A1; or for the S2: if the measurement value C1 does not exceed the threshold value A1, the main control system sends an alarm instruction to the alarm unit provided in the refueling machine, and the alarm unit issues a yellow alarm according to the instruction of the main control system.

3. The method of claim 1, wherein the method further comprises: For the S3: S301: if the measurement value B2 does not exceed the threshold value A2, the measurement value C2 is compared with the threshold value A2; S302: if the measurement value C2 exceeds the threshold value A2; or for the S4: if the measurement value C2 does not exceed the threshold value A2, the main control system sends an alarm instruction to the alarm unit, and the alarm unit issues an orange alarm according to the instruction of the main control system; the main control system also sends a closing instruction to the oil pump and the electromagnetic valve.

4. The method of claim 3, wherein the step of determining the presence of a person in the area of the fuel dispenser comprises the steps of: determining the presence of a person in the area of the fuel dispenser by using a sensor. For the step S301, if the measurement value C2 does not exceed the threshold value A2, the main control system sends an alarm instruction to the alarm unit, the alarm unit issues a yellow alarm according to the instruction of the main control system, and the main control system sends a closing instruction to the oil pump and the electromagnetic valve.

5. A safety protection method for a fuel dispenser according to claim 2, characterized in that, In the S101: S103: if the measurement value C1 does not exceed the threshold value A1, the measurement value B2 is compared with the threshold value A2; S104: if the measurement value B2 does not exceed the threshold value A2, the measurement value C2 is compared with the threshold value A2; S105: if the measurement value C2 does not exceed the threshold value A2, the data monitored by the main control system is normal, and the refueling machine is in a normal state.

6. A safety protection method for a fuel dispenser according to claim 5, characterized in that, For the S103: S1031: if the measurement value B2 exceeds the threshold value A2, the measurement value C2 is compared with the threshold value A2; S1032: if the measurement value C2 exceeds the threshold value A2, the main control system sends an alarm instruction to the alarm unit, and the alarm unit issues an orange alarm according to the instruction of the main control system.

7. The method of claim 6, wherein the step of determining the presence of a person in the area of the fuel dispenser comprises the steps of: determining the presence of a person in the area of the fuel dispenser by using a sensor. For the S1031 measured value C2 not exceeding the threshold value A2 and for the S104 measured value C2 exceeding the threshold value A2, the master system sends an alarm instruction to the alarm unit, and the alarm unit issues a yellow instruction according to the instruction of the master system.

8. The method of claim 1, wherein the method further comprises: The acceleration data and the rotation angle data each include data of each of an X-axis, a Y-axis and a Z-axis.

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