Quantitative oil delivery anti-cheating monitoring system
The intelligent monitoring system solved the problems of electromagnetic interference and cheating in the oil depot's quantitative oil dispensing system, achieving precise control and risk prevention in the oil dispensing process, and improving the digital management level and safety of the oil depot.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-04-14
AI Technical Summary
The quantitative oil dispensing system at the oil depot is susceptible to interference in a complex electromagnetic environment, with the possibility of changes in flow meter pulse signals and human tampering. The lack of effective digital monitoring means leads to inaccurate oil dispensing, and the inability to remotely monitor the status of electro-hydraulic valves poses a risk of cheating.
The system employs intelligent flow meters, intelligent flow meter transmitters, intelligent electro-hydraulic valves, PLC controllers, alarm systems, and wireless transmission systems, combined with a central control host computer, to achieve flow meter pulse monitoring, electro-hydraulic valve status management, and identification. Through wireless transmission and data comparison, it provides real-time alarm and traceability functions to ensure the accuracy and safety of the oil dispensing process.
It enables precise control and risk prevention of the oil dispensing process, reduces human interference, improves the operational efficiency of the oil depot, ensures the accuracy and safety of the oil dispensing quantity, and enhances the level of digital monitoring and the ability to prevent and control safety accidents.
Smart Images
Figure CN121857424A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of oil monitoring and control, and in particular to a quantitative oil dispensing anti-cheating monitoring system. Background Technology
[0002] In a modern oil depot operation system, the stability and accuracy of the quantitative oil dispensing system at the oil depot level play a crucial role in ensuring the fairness and impartiality of oil trade and the safety and efficiency of oil depot operations. Among these systems, the flow meter, as the core metering device in the dispensing process, directly determines the accuracy and reliability of the dispensing process through the precision of its dispensing pulses. However, in-depth research has revealed numerous problems that urgently need to be addressed in the current operation of the quantitative oil dispensing system at oil depot levels.
[0003] In actual operation scenarios, the electromagnetic environment around oil depots is extremely complex. The flow meter pulses of the quantitative oil dispensing system at the oil depot are susceptible to strong magnetic interference. According to the principle of electromagnetic induction, a strong external magnetic field will generate an induced electromotive force in the pulse transmission line of the flow meter, which will be superimposed on the original pulse signal, causing changes in the frequency and amplitude of the dispensing pulse. At the same time, there may be cases of human intervention in the circuit affecting the accuracy of the dispensing pulses, causing the dispensing controller to receive the flow meter pulses inaccurately, resulting in inaccurate dispensing. In addition, by installing cheating devices between the flow meter and the dispensing controller, the pulse transmission can be stopped, causing insufficient counting by the dispensing control system, which may constitute a cheating situation. Currently, there are no effective digital control measures for these issues. Power outages due to malfunctions of the flow meter's electronic meter head and empty pipelines can cause the flow meter rotor to rotate in the forward or reverse direction, and there is a lack of effective digital monitoring methods. As a key component for the start-up and shutdown of the entire oil dispensing system, the process status of key valves such as normally open, normally closed, and manual operation of the electro-hydraulic valves at the oil depot cannot be effectively monitored and managed digitally. There are also issues with incomplete sealing of the electro-hydraulic valves and the inability to effectively monitor the valve status remotely. The mass flow meter is a straight-through pipe type flow meter. When there is no vibration signal after a power outage, the electro-hydraulic valve and manual valve can be tampered with to cheat by dispensing oil. The mass flow meter lacks control. At present, volumetric flow meters generally do not have standby oil dispensing detection function, cannot automatically check the oil dispensing volume to prevent cheating, and lack flow condition monitoring. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a quantitative oil dispensing anti-cheating monitoring system. This invention focuses on the field of oil product monitoring and control, aiming to create a highly efficient, accurate, and stable oil product monitoring and control system. The purpose of this system is to establish an integrated quantitative oil dispensing monitoring system encompassing quantitative oil dispensing, flow meter pulse monitoring, and electro-hydraulic valve supervision. This system enables monitoring of oil flow conditions, pulse comparison monitoring with out-of-tolerance alarms, flow meter cumulative pulse count verification, and forward / reverse rotation identification; it also enables electro-hydraulic valve status monitoring, precise graded control, signal feedback, and ID identification; transmitter power monitoring and abnormal alarms; recording data and cumulative pulses of each intelligent flow meter so that users can trace the usage of each flow meter; and improving the comprehensive management and control functions of oil depots regarding flow meter data management.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A quantitative oil dispensing anti-cheating monitoring system includes an intelligent flow meter, an intelligent flow meter transmitter integrated with the intelligent flow meter, an intelligent electro-hydraulic valve, a PLC controller, an alarm system, a wireless transmission system, and a central control host computer. The central control host computer is equipped with host computer management software for monitoring the oil dispensing process. The intelligent flow meter is a high-precision volumetric flow meter. The intelligent flow meter transmitter is equipped with a wireless device, which can transmit signals and data to the central control host computer through the wireless transmission system. The intelligent flow meter has a DI interface for receiving commands from the PLC controller. The intelligent flow meter transmitter is equipped with a battery to support monitoring of oil flow during power outages. The oil dispensing process of the quantitative oil dispensing anti-cheating monitoring system is as follows: Upon receiving the oil dispensing command, the host computer control software identifies the smart flow meter ID and the smart electro-hydraulic valve ID. If the ID identification is abnormal, the central control host computer alarms and oil dispensing cannot proceed. If the ID identification is normal, oil dispensing begins. The host computer control software receives and records the cumulative amount before oil dispensing, the cumulative amount after oil dispensing, and the amount of oil dispensed during a single oil dispensing process. The difference between the cumulative amounts before and after oil dispensing, as well as the amount of oil dispensed, are compared with the pulse oil quantity received by the PLC controller. If the difference between either of these two comparison methods exceeds the comparison difference set by the host computer control software, the alarm system triggers an alarm. In non-oil dispensing mode, if the intelligent flow meter detects oil flow, it will send the detected single flow to the central control host computer via a wireless device and trigger an alarm; when power is off, the intelligent flow meter is powered by a battery.
[0006] Furthermore, the intelligent flow meter has start and end reading recognition. When the DI interface of the intelligent flow meter is high, it is in the oil dispensing state; when the DI is low, it is in the non-oil dispensing state. When the PLC controller is powered off, the DI interface is low.
[0007] Furthermore, the intelligent flow meter has a forward and reverse rotation recognition function, which can distinguish the direction of medium flow and count them separately.
[0008] Furthermore, the intelligent flow meter can intelligently identify and automatically clear small fluctuations in the medium within the pipeline when it is not generating oil.
[0009] Furthermore, the battery is equipped with a power failure reminder and a low battery alarm; the alarm system includes on-site audible and visual alarms and central control room audible and visual alarms.
[0010] Furthermore, the intelligent flow meter transmitter operates for more than one month during power outages.
[0011] Furthermore, the central control host computer has a traceability function, which can record the data and pulse accumulation of each smart flow meter separately.
[0012] The beneficial effects of this invention are as follows: This invention achieves risk control in the quantitative oil dispensing system and realizes anti-cheating monitoring of the oil dispensing pulse of the flow meter. The benefits are threefold: first, it ensures the accuracy and reliability of the oil dispensing quantity, improving the level of digital monitoring in oil depots; second, it reduces human interference factors, improves the operational efficiency of the oil station, and facilitates better resource management, cost reduction, efficiency improvement, and increased profitability for oil depots; third, cheating often involves illegal modification and damage to the oil dispensing equipment, which may lead to decreased equipment performance or malfunctions, and the system enhances the ability to prevent safety accidents. The anti-cheating device can promptly detect and prevent illegal activities, ensuring the safe and stable operation of the oil dispensing station. Attached Figure Description
[0013] Figure 1 This is a structural diagram illustrating the anti-cheating principle of the quantitative oil dispensing anti-cheating monitoring system of the present invention; Figure 2 This is the power failure monitoring operation logic diagram of the present invention; Figure 3 This is a schematic diagram illustrating the forward and reverse rotation technology of this invention. Figure 4 This is a schematic diagram of flow meter data monitoring according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the upper computer control software for judging the power failure alarm of the flow meter in an embodiment of the present invention; The labels in the diagram are as follows: 1-Gateway, 2-Central Control Host Computer, 3-Central Control Alarm, 4-PLC Controller, 5-Field Alarm, 6-Intelligent Flow Meter, 7-Intelligent Electro-hydraulic Valve, 61-Intelligent Flow Meter 1, 62-Intelligent Flow Meter 2, 63-Intelligent Flow Meter 3. Detailed Implementation
[0014] The present invention will be further described in detail below with reference to embodiments, such as... Figure 1 , Figure 2 , Figure 3As shown, the quantitative oil dispensing anti-cheating monitoring system includes an intelligent flow meter, an intelligent flow transmitter integrated with the intelligent flow meter, an intelligent electro-hydraulic valve, a PLC controller, an alarm system, a wireless transmission system, and a central control host computer. The central control host computer is equipped with host computer management software for monitoring the oil dispensing process. The intelligent flow meter is a high-precision volumetric flow meter. The intelligent flow meter transmitter is equipped with a wireless device, which can transmit signals and data to the central control host computer through the wireless transmission system. The intelligent flow meter also has a DI interface for receiving commands from the PLC controller. The intelligent flow meter transmitter is equipped with a battery to support monitoring of oil flow during power outages. The intelligent flow meter has forward and reverse rotation recognition capabilities.
[0015] The intelligent flow meter features an extremely sensitive rotor capable of detecting flow rates as low as 0.5 m³ / h. Linearity accuracy is ±0.05%, and repeatability is 0.01%. It is equipped with a mechanical pulse output for strong anti-interference capabilities. The wireless receiver and encrypted communication utilize encrypted communication (433MHz public frequency wireless transmission with digital signal encryption). The central control computer and software automatically record oil dispensing data for each crane position, compare results, and trigger alarms in case of anomalies. A low-power audible and visual alarm system includes a flashing red light and a buzzer, designed for low power consumption to ensure battery life. The computing unit and processing system feature a self-designed computing circuit and program. Detailed technical route description: (1) Design of host computer control software The functions of the host computer control software include: receiving and displaying oil dispensing volume and comparison difference information, configuring pulse alarm difference values, controlling the opening and closing of the audible and visual alarm in the central control room, storing abnormal oil dispensing data of the crane positions, and realizing simultaneous monitoring of multiple crane positions.
[0016] (2) Transmitter and arithmetic unit circuit design Transmitter power supply options: External power supply: (9~36)V DC power supply, which can be powered by a separate power supply or directly by the PLC. Battery power supply: When the external power supply is interrupted, a lithium battery is used to power the transmitter and alarm. The battery status can be monitored by the central control unit.
[0017] Power-off operation: When the meter is powered solely by battery, the pulse detection alarm function is activated. At this time, the flow meter detects oil flow and triggers an audible and visual alarm, sending an alarm signal to the central control room. The design replaces the screen with a low-power segment LCD (with backlight) and modifies the pulse output circuit. When power is off, it no longer outputs pulses, only records and saves the oil delivery record. No additional power consumption is generated when the battery is powered.
[0018] The processing unit adds a pulse detection circuit to the output of the meter. Pulse acquisition is performed through the circuit shown in the diagram below (simulated PLC or PLC controller reception). The meter automatically compares the received pulse count with the actual transmitted pulse count. When the difference reaches a set value, an alarm signal is sent to the central control room. For example... Figure 1, Figure 3 As shown, this circuit can detect the pulse difference generated by the disconnection or shorting of the signal line. (3) Transmitter design Battery communication: Reads battery level and allows setting alarm values on the central control software (initial setting is alarm below 10%). The transmitter battery provides a low-battery alert. Under full load, the transmitter battery can provide power continuously for 15 days; under normal operating frequency, it can provide power for approximately 2 months.
[0019] Pulse anomaly detection: Collect pulse counts and compare them with the actual number of pulses emitted in a single pulse. When a difference is found, an alarm signal is sent.
[0020] Wireless transmission encoding: Data packet Modbus protocol: Address code + Function data code + Data position + Data length + Checksum; Data transmission format: Byte transmission: LSB First, 8 data bits, 2 stop bits, no checksum. Word transmission (except CRC16 checksum): Transmitted in two bytes, with the most significant byte first and the least significant byte last. For example: 0x0102, 0x01 is transmitted first, then 0x02. Double-word and multi-word transmission: Transmitted in multiple words, with the least significant word first and the most significant word last. For example: 0x01020304, the least significant word 0x0304 is transmitted first, then the most significant word 0x0102, with the byte transmission order being 0x03, 0x04, 0x01, 0x02.
[0021] Functional data: oil dispensing status, single dispensing volume, return pulse acquisition volume, power consumption, alarm information.
[0022] (4) Wireless transmission design The low-power Ebyte-E220 wireless transmission chip was selected, and the data transmission format was configured in software and then integrated onto the circuit board. Transmission method: encrypted transmission on the public 433MHz band; data packets use Modbus packetization to ensure transmission accuracy; transmission distance: 500m in unobstructed environments, approximately 200m through 3-4 walls; transmission time: 0.5 seconds.
[0023] Transceiver: Ebyte-E220 wireless serial port module (integrated into the chassis).
[0024] Master-slave configuration: The master is the central control computer, set to real-time transmit / receive mode; the slave is the flow meter head, set to station address and mode to transmit mode.
[0025] Sleep mode: Enters sleep mode (low power) after switching to battery power; activates when an alarm message is received (slave).
[0026] The hair oil process, such as Figure 4As shown, there are three intelligent flow meters, labeled as Flow Meter 1, Flow Meter 2, and Flow Meter 3. The host computer control software identifies the flow meter ID and the intelligent electro-hydraulic valve ID. By identifying the device ID, it ensures that the equipment is in normal condition and prevents unauthorized equipment replacement. The host computer control software records the total cumulative volume of the intelligent flow meters before and after this oil dispensing. It compares the difference between the cumulative volume of the intelligent flow meters before and after this dispensing with the pulse received by the PLC controller. The intelligent flow meters also upload the oil dispensing volume via wired transmission and compare it with the pulse received by the PLC controller. When the difference between the two comparison methods exceeds the comparison difference set in the software terminal, the alarm system triggers an alarm. Specific parameters are shown in Tables 1 and 2.
[0027] Table 1 Data Acquisition by Smart Flow Meter
[0028] Table 2 Traffic Data Monitoring
[0029] Non-oil-processing, such as Figure 5 As shown, during a power outage, the intelligent flow meter is powered by a battery (the PLC controller is powered off). The intelligent flow meter is equipped with a DI interface; a high DI indicates the start of oil flow, and a low DI indicates the end of oil flow. The intelligent flow meter receives instructions from the PLC controller to determine the start and end of oil flow. In the power-off state, when DI is low, it is in a non-oil-flowing state. If the flow meter detects oil flow, it wirelessly transmits the single-flow volume to the central control computer and triggers the alarm system. Simultaneously, the intelligent flow meter has forward and reverse rotation recognition technology, effectively preventing errors caused by the electronic meter's inability to effectively identify forward and reverse flow due to pipeline closures. The control software records the data and total cumulative pulse volume of each intelligent flow meter, facilitating the oil depot's tracking of each flow meter's usage and improving the oil depot's management of flow meter data.
[0030] The above content is only used to illustrate the technical solution of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.
Claims
1. A quantitative oil dispensing anti-cheating monitoring system, characterized in that: The system includes an intelligent flow meter (including an intelligent flow meter transmitter), an intelligent electro-hydraulic valve, a PLC controller, an alarm system, a wireless transmission system, and a central control host computer. The central control host computer is equipped with host computer management software for monitoring the oil dispensing process. The intelligent flow meter is a high-precision volumetric flow meter. The intelligent flow meter transmitter is equipped with a wireless device, which can transmit signals and data to the central control host computer via the wireless transmission system. The intelligent flow meter has a DI interface for receiving commands from the PLC controller. The intelligent flow meter transmitter is equipped with a battery to support monitoring of oil flow during power outages. The oil dispensing process of the quantitative oil dispensing anti-cheating monitoring system is as follows: Upon receiving the oil dispensing command, the host computer control software identifies the smart flow meter ID and the smart electro-hydraulic valve ID. If the ID identification is abnormal, the central control host computer alarms and oil dispensing cannot proceed. If the ID identification is normal, oil dispensing begins. The host computer control software receives and records the cumulative amount before oil dispensing, the cumulative amount after oil dispensing, and the amount of oil dispensed during a single oil dispensing process. The difference between the cumulative amounts before and after oil dispensing, as well as the amount of oil dispensed, are compared with the pulse oil quantity received by the PLC controller. If the difference between either of these two comparison methods exceeds the comparison difference set by the host computer control software, the alarm system triggers an alarm. In non-oil dispensing mode, if the intelligent flow meter detects oil flow, it will send the detected single flow to the central control host computer via a wireless device and trigger an alarm; when power is off, the intelligent flow meter is powered by a battery.
2. The quantitative oil dispensing anti-cheating monitoring system according to claim 1, characterized in that: The intelligent flow meter has start and end reading recognition. When the DI interface of the intelligent flow meter is high, it is in the oil dispensing state, and when the DI is low, it is in the non-oil dispensing state. When the PLC controller is powered off, the DI is low.
3. The quantitative oil dispensing anti-cheating monitoring system according to claim 1, characterized in that: The intelligent flow meter has forward and reverse rotation recognition function, which can distinguish the direction of medium flow and count them separately.
4. The quantitative oil dispensing anti-cheating monitoring system according to claim 1, characterized in that: The intelligent flow meter can intelligently identify and automatically clear small fluctuations in the medium inside the pipeline when it is not generating oil.
5. The quantitative oil dispensing anti-cheating monitoring system according to claim 1, characterized in that: The battery is equipped with a power failure reminder and a low battery alarm; the alarm system includes on-site audible and visual alarms and central control room audible and visual alarms.
6. The quantitative oil dispensing anti-cheating monitoring system according to claim 1, characterized in that: The intelligent flow meter transmitter has been in operation for more than one month without power.
7. The quantitative oil dispensing anti-cheating monitoring system according to claim 1, characterized in that: The central control host computer has a traceability function, which can record the data and pulse accumulation of each smart flow meter.