Intelligent filling system

Abstract

The invention relates to the field of industrial automation, and discloses an intelligent filling system which comprises a PLC module used for logic control and data processing; the sensor module is used for monitoring the liquid levels of the anti-freezing liquid oil tank and the engine oil tank in real time through a liquid level sensor; the flow meter module is used for detecting the flow of the anti-freezing solution and the engine oil through a flow meter; the oil pump control module is used for conveying anti-freezing liquid or engine oil through an oil pump; the valve module is used for controlling the flow of the anti-freezing solution or the engine oil through an electromagnetic valve; the touch control module is used for performing parameter setting, operation state display and alarm prompt through an HMI touch screen; and the industrial Ethernet module is used for realizing communication between the PLC module and other components. Through cooperation of the flowmeter and the PLC, the flow and the accumulative filling amount are monitored in real time, the states of an oil pump and a valve are dynamically adjusted according to a target value, control logic is optimized, the filling precision is improved, liquid waste is remarkably reduced, and the economical efficiency and the environmental protection property of the system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial automation, and in particular to an intelligent filling system. Background Art

[0002] With the continuous development of industrial automation technology, liquid filling systems are increasingly used in many fields, including antifreeze filling of generators and quantitative replenishment of lubricating oil. These systems usually achieve the delivery and filling of liquids through the coordinated work of sensors, oil pumps and controllers. Traditional liquid filling systems mostly use mechanical flow meters, manual operations or simple time control methods to meet some basic needs. However, the functional design of such systems is relatively fixed, usually optimized for a single scenario, and it is difficult to perform at its best in a complex and changeable industrial environment. In addition, some more advanced automated filling equipment has gradually acquired preliminary intelligent control capabilities, but its implementation method is still mainly mechanical adjustment, and there is still room for improvement in control accuracy, operating efficiency and system integration.

[0003] Although the above technologies have improved the efficiency of filling operations to a certain extent, as industrial sites put forward higher requirements for accuracy, safety and intelligence for filling systems, the limitations of traditional technologies have gradually emerged. For example, the quantitative control of the filling amount depends on fixed time or single-point sensor signal feedback, which is prone to errors when the liquid flow fluctuates greatly; the level sensor or flow meter is disturbed by environmental factors during long-term operation, which may lead to a decrease in measurement accuracy. In addition, many existing technologies lack the ability to respond quickly to abnormal conditions, especially when there are problems such as pipeline blockage, oil pump overload or insufficient liquid. The system cannot issue an alarm or take protective measures in time, which can easily cause safety hazards or equipment damage. At the same time, since the communication method mostly adopts a point-to-point design, it is difficult to support the needs of modular expansion or remote monitoring. These problems make it difficult for existing technologies to adapt to the requirements of efficient, stable and intelligent filling in complex industrial scenarios, so they are urgently needed to be optimized and improved through technological innovation. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an intelligent filling system, which solves the problems of insufficient filling accuracy, slow abnormal response and poor system scalability in the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intelligent filling system, comprising:

[0006] PLC module for logic control and data processing;

[0007] A sensor module for real-time monitoring of the liquid levels of the antifreeze tank and the engine oil tank through a liquid level sensor;

[0008] Flow meter module, used to detect the flow rates of antifreeze and engine oil through a flow meter;

[0009] Oil pump control module, used to transport antifreeze or engine oil through an oil pump;

[0010] Valve module, used to control the flow rates of antifreeze or engine oil through solenoid valves;

[0011] Touch module, used for parameter setting, operating status display, and alarm prompting through an HMI touch screen;

[0012] Industrial Ethernet module, used to achieve communication between the PLC module and other components;

[0013] Acoustic and optical alarm module, used to prompt abnormal operation or faults;

[0014] Among them, the PLC module controls the start and stop actions of the oil pump and solenoid valve according to the filling parameters input by the touch module, and monitors the operating status in real time based on the data of the flow meter and liquid level sensor; when the filling is completed or an abnormality occurs, it triggers an alarm or stops operating.

[0015] Preferably, the PLC module collects the instantaneous flow rate F(t) of the flow meter in real time, and calculates the cumulative filling volume Q through the following formula:

[0016]

[0017] Among them, Q is the cumulative filling volume, F(t i ) is the instantaneous flow rate of the i-th sampling, Δt is the sampling time interval, and N is the number of samplings;

[0018] When the cumulative filling volume Q reaches the set value, the PLC module closes the solenoid valve and stops the oil pump.

[0019] Preferably, the liquid level sensor is used to monitor the liquid level of the fuel tank in real time. When the liquid level is lower than the preset value L min

[0020] At this time, the PLC module triggers an acoustic and optical alarm and supplements the liquid from the temporary storage tank to the main fuel tank through a liquid replenishment pump; when the liquid level reaches the set upper limit value L max At this time, the PLC module controls the liquid replenishment pump to stop operating.

[0021] Preferably, the HMI touch screen is used to set the following parameters:

[0022] Generator model and power range;

[0023] Target filling volume V of antifreeze or engine oil set ;

[0024] Upper and lower limits of pipeline pressure P max and Pmin ;

[0025] The upper and lower limit values L of the fuel tank liquid level alarm max and L min ;

[0026] Meanwhile, it will also display the following information in real time:

[0027] System operation status;

[0028] Accumulative filling volume Q;

[0029] Fuel tank liquid level status;

[0030] Fault alarm information and fault location.

[0031] Preferably, the industrial Ethernet module realizes the following real-time data interaction through the PLC module:

[0032] The data of the liquid level sensor and the flowmeter are uploaded to the HMI touch screen;

[0033] The operation instructions input by the HMI touch screen are sent down to the PLC module;

[0034] The logic control signals of the PLC module are transmitted to the oil pump and the solenoid valve;

[0035] The system operation and alarm status data are synchronized to the remote device.

[0036] Preferably, the PLC module has a fault detection function. When any of the following faults occurs, it triggers an audible and visual alarm and stops running:

[0037] Oil pump overload: oil pump current I pump > I rated ;

[0038] Solenoid valve action timeout;

[0039] Flowmeter signal abnormal: flow F(t) < F min ;

[0040] Liquid level sensor signal abnormal: liquid level L > L max or L < L min ;

[0041] Pipeline pressure abnormal: pressure P > P max or P < P min .

[0042] Preferably, the audible and visual alarm module includes a red warning light and a buzzer:

[0043] The red warning light flashes to indicate the fault status;

[0044] The buzzer emits a sharp beep once every second to warn the operator of the urgency of the fault;

[0045] When the audible and visual alarm module starts to give an alarm, the HMI touch screen interface displays the specific fault cause and location.

[0046] Preferably, the PLC module controls the filling process including the following steps:

[0047] S1. According to the filling parameters input by the HMI, the PLC module controls the oil pump to start and opens the solenoid valve;

[0048] S2. The flowmeter monitors the flow rate in real time and accumulatively calculates the total filling volume;

[0049] S3. When ≥ the target filling volume, the PLC module controls to close the solenoid valve and stop the oil pump;

[0050] S4. The HMI displays the "filling completed" status and records the filling parameters;

[0051] S5. When it is detected that replenishment is required, the operator can input a replenishment instruction through the touch screen of the temporary replenishment water tank in the test room, and the PLC module controls the replenishment pump to transport the antifreeze from the temporary replenishment water tank to the main system to achieve the temporary replenishment operation.

[0052] Preferably, the system has a data recording function, including:

[0053] The time, filling volume, and pressure change curve of each filling;

[0054] The operating status of the oil pump and solenoid valve;

[0055] The real-time data of the liquid level sensor and flowmeter;

[0056] The type, time, and location of the fault alarm;

[0057] The data is exported through the HMI interface for subsequent analysis and maintenance.

[0058] Preferably, the system supports multi-model parameter setting. By storing the antifreeze or oil filling parameters of different models through the HMI, including the target filling volume, minimum flow rate min, and upper and lower pressure limits min and max, the filling mode can be quickly called and switched.

[0059] The present invention provides an intelligent filling system. It has the following beneficial effects:

[0060] 1. Through the collaborative cooperation of the flowmeter module and the PLC module, the present invention realizes the precise monitoring and control of liquid flow rate and cumulative filling volume. By real-time collecting the instantaneous flow signal of the flowmeter and combining with the preset filling target value, the system can dynamically adjust the operating states of the oil pump and the valve to ensure that the filling volume is strictly controlled within the error range. At the same time, through the optimization of the control logic, by gradually reducing the valve opening or lowering the rotational speed of the oil pump, the accuracy at the end of filling is improved. This precise quantitative control method significantly reduces liquid waste and enhances the economy and environmental protection of the industrial filling system.

[0061] 2. The present invention adopts a modular design architecture, in which each functional module realizes high-speed data communication and real-time collaboration through the industrial Ethernet module. This modular design enables the system to have good scalability and flexibility, and can be quickly adjusted and upgraded according to actual needs. In addition, the modular design also improves the fault tolerance of the system. For example, through the redundancy mechanism of the industrial Ethernet module and the independent alarm function of the audible and visual alarm module, problems can be quickly isolated and response measures can be triggered when the system fails, ensuring the safety and stability of the system.

[0062] 3. The present invention realizes an intuitive operation interface design through the touch control module. The operator can real-time monitor various parameters during the filling process and flexibly adjust the operating parameters through the touch interface. In addition, combined with the remote communication function of the industrial Ethernet module, the system supports remote monitoring and management of data. The operator can view the operating status, adjust the control parameters, and receive alarm information in real time at the remote terminal. This intelligent design improves the operation efficiency of the system, reduces the dependence on on-site operation, and at the same time provides higher management efficiency and flexibility for distributed industrial scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a schematic diagram of the system modules of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0064] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0065] Please refer to the attached Figure 1 , an intelligent filling system provided by an embodiment of the present invention includes:

[0066] A PLC module for logic control and data processing;

[0067] A sensor module for real-time monitoring of the liquid levels of the antifreeze tank and the engine oil tank through a liquid level sensor;

[0068] A flow meter module for detecting the flow rates of the antifreeze and the engine oil through a flow meter;

[0069] An oil pump control module for delivering the antifreeze or the engine oil through an oil pump;

[0070] A valve module for controlling the flow rates of the antifreeze or the engine oil through a solenoid valve;

[0071] A touch control module for parameter setting, operating status display, and alarm prompting through an HMI touch screen;

[0072] An industrial Ethernet module for enabling communication between the PLC module and other components;

[0073] An audible and visual alarm module for prompting abnormal operation or faults;

[0074] Among them, the PLC module controls the start and stop actions of the oil pump and the solenoid valve according to the filling parameters input by the touch control module, and monitors the operating status in real time based on the data of the flow meter and the liquid level sensor; when the filling is completed or an abnormality occurs, it triggers an alarm or stops running;

[0075] The system has a data recording function, including:

[0076] The time of each filling, the filling volume Q, and the pressure change curve;

[0077] The operating status of the oil pump and the solenoid valve;

[0078] The real-time data of the liquid level sensor and the flow meter;

[0079] The type, time, and location of the fault alarm;

[0080] The data is exported through the HMI interface for subsequent analysis and maintenance;

[0081] The system supports parameter setting for multiple models, and stores the filling parameters of the antifreeze or the engine oil for different models through the HMI, including the target filling volume, the minimum flow rate F min , the upper and lower pressure limits P min and P max , and can quickly call and switch the filling mode;

[0082] The PLC module collects the instantaneous flow rate F(t) of the flow meter in real time, and calculates the cumulative filling volume Q through the following formula:

[0083]

[0084] Among them, Q is the cumulative filling volume, F(t i$q_i$ is the instantaneous flow rate of the $i$-th sampling, $\Delta t$ is the sampling time interval, and $N$ is the number of samplings;

[0085] When the cumulative filling volume $Q$ reaches the set value, the PLC module closes the solenoid valve and stops the oil pump;

[0086] The liquid level sensor is used to monitor the liquid level of the fuel tank in real time. When the liquid level is lower than the preset value $L$ min the PLC module triggers an audible and visual alarm and replenishes the liquid from the temporary storage tank to the main fuel tank through the replenishing pump; when the liquid level reaches the set upper limit value $L$ max the PLC module controls the replenishing pump to stop running;

[0087] The HMI touch screen is used to set the following parameters:

[0088] Generator model and power range;

[0089] The target filling volume $V$ of antifreeze or engine oil set ;

[0090] Upper and lower limits of pipeline pressure $P$ max and $P$ min ;

[0091] Upper and lower limit values $L$ of fuel tank liquid level alarm max and $L$ min ;

[0092] At the same time, it also displays the following information in real time:

[0093] System operation status;

[0094] Cumulative filling volume $Q$;

[0095] Fuel tank liquid level status;

[0096] Fault alarm information and fault location;

[0097] The PLC module has a fault detection function. When any of the following faults occur, it triggers an audible and visual alarm and stops running:

[0098] Oil pump overload: oil pump current $I$ pump >$I$ rated ;

[0099] Solenoid valve action timeout;

[0100] Flowmeter signal abnormal: flow rate $F(t)$ < $F$ min ;

[0101] Liquid level sensor signal abnormal: liquid level $L$ > $L$ max or $L$ < $L$ min ;

[0102] Pipeline pressure abnormal: pressure P> P max or P < P min ;

[0103] The PLC module controls the filling process, which includes the following steps:

[0104] S1. According to the filling parameters input by the HMI, the PLC module controls the oil pump to start and opens the solenoid valve;

[0105] S2. The flowmeter monitors the flow rate F(t) in real time and accumulatively calculates the total filling volume Q;

[0106] S3. When Q ≥ the target filling volume, the PLC module controls to close the solenoid valve and stop the oil pump;

[0107] S4. The HMI displays the "filling completed" status and records the filling parameters;

[0108] S5. When it is detected that replenishment is required, the operator can input a replenishment instruction through the touch screen of the temporary replenishment water tank in the test room, and the PLC module controls the replenishment pump to transport the antifreeze from the temporary replenishment water tank to the main system to achieve the temporary replenishment operation;

[0109] The audible and visual alarm module includes a red warning light and a buzzer:

[0110] The red warning light flashes to indicate the fault status;

[0111] The buzzer emits a sharp beep once per second to warn the operator of the urgency of the fault;

[0112] When the audible and visual alarm module starts to give an alarm, the HMI touch screen interface displays the specific fault cause and fault location;

[0113] The industrial Ethernet module realizes the following real-time data interaction through the PLC module:

[0114] The data of the liquid level sensor and the flowmeter are uploaded to the HMI touch screen;

[0115] The operation instructions input by the HMI touch screen are sent down to the PLC module;

[0116] The logic control signals of the PLC module are transmitted to the oil pump and the solenoid valve;

[0117] The system operation and alarm status data are synchronized to the remote device.

[0118] Specifically, as the center of the system, the PLC module is the data operation and logic control center of the entire control system. The PLC module is closely linked with functional modules such as liquid level sensors, flow meters, oil pumps, solenoid valves, and HMI touch screens. After the system starts, the PLC module communicates with other modules in real time through industrial Ethernet to coordinate the normal operation of the entire filling process. This module is responsible for performing multiple core tasks such as self-checking, data acquisition, logical judgment, and control signal output.

[0119] Generally, during the system initialization phase, the PLC module first completes the self-check process, including detecting input signals, output signals, and the operating status of internal logic. After completing the self-check, the PLC enters the standby state, waiting for the operating parameters input by the HMI touch screen.

[0120] In this embodiment, the main functions of the PLC module include the following aspects:

[0121] Specifically, during the operation of the system, the PLC module receives the signal data of the liquid level sensor in real time through its analog acquisition module to judge the liquid level status of the antifreeze and oil tanks. The signal range of the liquid level sensor is usually 4mA to 20mA, and the PLC converts this signal into a liquid level percentage value L. As an option, when the liquid level is lower than the preset lower limit L min the PLC module will trigger an alarm and prompt the operator to replenish the liquid through the HMI touch screen.

[0122] In a possible implementation, the PLC module simultaneously collects the data of the flow meter to monitor the instantaneous flow rate F(t) of the filling pipeline in real time. Generally, the sampling frequency of the flow meter is set to 0.1 second, and the sampling data is cumulatively calculated through the following formula:

[0123]

[0124] where Q is the cumulative filling volume, F(t i ) is the instantaneous flow rate at the i-th sampling point, Δt is the sampling time interval, and N is the total number of sampling points.

[0125] Specifically, when the cumulative filling volume Q reaches the target value V set the PLC module controls the solenoid valve to close and stops the operation of the oil pump to ensure the accuracy of the filling process.

[0126] As an option, the PLC also monitors the pipeline pressure P through a pressure sensor. In a possible implementation, the upper and lower limit values of the pipeline pressure are respectively set to P min and P max . When the pressure P > P max or P < P minWhen this happens, the PLC triggers an abnormal signal to pause the filling process, and at the same time, the surrounding operators are prompted to check through the audible and visual alarm unit.

[0127] In this embodiment, the PLC also has a built-in fault detection program to determine whether the equipment is operating normally. For example, when the detected oil pump current I pump exceeds the rated value I rated , the PLC will immediately stop the operation of the oil pump and trigger an alarm signal. Similarly, when the solenoid valve action times out or the flowmeter data is abnormal (such as the instantaneous flow rate F(t) < F min ), the PLC controls the red warning light of the audible and visual alarm unit to flash through the output module, and makes the buzzer sound rapidly at a frequency of once per second.

[0128] As another possible implementation, the PLC also supports independent control of the temporary water replenishment tank in the test room. When the system detects that the liquid level of the main fuel tank is lower than the safe range but needs to continue running, the operator can issue a water replenishment instruction through the touch screen in the test room. At this time, the PLC controls the liquid filling pump to start, conveys the antifreeze from the temporary water replenishment tank to the liquid storage pipeline of the main system, and automatically stops after completion.

[0129] In some embodiments, the PLC also provides functions for storing and calling multi-model parameters through the HMI touch screen. The operator can preset the filling parameters of generators in different power ranges through the touch screen, including the target filling volume V set , the lower flow limit F min , the upper and lower pressure limits P min and P max , the liquid level alarm threshold L min and L max . Specifically, these parameters are stored in the holding register of the PLC. When switching the generator model, the PLC quickly loads the corresponding parameters to complete the switching of the filling mode.

[0130] As an extended function, the PLC also has the ability to record and export data. Generally, the PLC records the following data in real time:

[0131] The cumulative filling volume Q of each filling process;

[0132] The pipeline pressure change curve;

[0133] The start and stop states of the oil pump and the solenoid valve;

[0134] The real-time monitoring data of the liquid level and the flow rate;

[0135] The type, time, and location of the fault alarm.

[0136] These data are synchronized to the HMI touch screen interface via industrial Ethernet for operators to view and export. Specifically, the recorded data can be exported in spreadsheet format for subsequent analysis or system maintenance.

[0137] The sensor module, as a key component of the intelligent filling system of the present invention, mainly undertakes the task of real-time monitoring of key physical parameters during the operation of the system. Its output data provides the necessary basic information for the logical judgment of the PLC module, and at the same time, through the coordinated action with the actuator, the safety and stability of the system filling process are achieved. Generally, the sensor module includes a liquid level sensor and a pressure sensor, which are respectively used to monitor the liquid level in the fuel tank and the pressure state in the pipeline. In this embodiment, the design and application of the sensor module focus on the accuracy of functions, the stability of signals, and the flexibility of installation.

[0138] As an option, the sensor module transmits the collected signal data to the PLC module for processing via industrial Ethernet or analog interfaces. Its output signal form is a standardized analog signal, such as 4mA - 20mA or 0V - 10V, to facilitate data transmission and further logical operations. The specific signal data usually corresponds to the real-time changes of physical parameters, such as liquid level height, pipeline pressure, etc., providing reliable data support for the entire filling process.

[0139] In this embodiment, the liquid level sensor is mainly installed at the top or side wall of the antifreeze tank and the engine oil tank to monitor the liquid level height of the stored liquid in real time. The liquid level sensor adopts a float type or ultrasonic type design to adapt to different viscosity liquid media and tank structure forms.

[0140] Generally, the output signal range of the liquid level sensor is 4mA - 20mA, which is converted into the liquid level percentage L by the analog module of the PLC and is associated with the tank height through the following formula:

[0141]

[0142] where H measured is the liquid level height actually measured by the sensor, and H tank is the total height of the tank.

[0143] Specifically, when the liquid level is lower than the set lower limit value L min , the liquid level sensor transmits the signal to the PLC module. The PLC module triggers an alarm according to the logical judgment and reminds the operator to supplement the liquid through the HMI interface. In some embodiments, the liquid level sensor is also linked with the liquid replenishment system. When the liquid level is lower than the critical value, the PLC module automatically starts the liquid replenishment pump according to the signal of the liquid level sensor, and transports the antifreeze from the temporary replenishment tank to the main tank until the liquid level reaches the preset upper limit value L max .

[0144] The pressure sensor is installed at the key nodes of the pipeline to monitor the pressure state inside the pipeline in real time. Generally, the output signal of the pressure sensor is an analog voltage or current signal, with a range of 0 - 4mA to 20 - 10V or 4mA to 20mA. Its main task is to provide safety guarantees for the liquid flow inside the pipeline and avoid equipment or pipeline failures caused by abnormal pressure.

[0145] As an option, the range of the pressure sensor should be set according to the pipeline design pressure. For example, for a conventional medium - pressure pipeline, a sensor with a range of 0MPa to 2MPa can be selected, while for a high - pressure transmission system, a sensor with a range of 0MPa to 10MPa can be selected to ensure the accuracy of data.

[0146] Specifically, the monitoring range of the pressure sensor is the preset upper and lower limits P min and P max . When the pressure P exceeds this range, the pressure sensor transmits an abnormal signal to the PLC module. As a possible implementation method, when P > P max , the system determines that the pipeline is over - pressured, and the PLC controls to close the solenoid valve and suspend the operation of the oil pump; when P < P min , it may be caused by pump failure or leakage, and the system will trigger an alarm and display detailed prompt information.

[0147] In some embodiments, the pressure sensor is combined with flow control. When the flowmeter signal shows a decrease in flow and an increase in pressure, the system can determine that the pipeline is blocked and trigger the corresponding maintenance process. Conversely, when the pressure decreases and the flow is insufficient, it may be due to insufficient liquid or the oil pump running idle, and liquid replenishment or maintenance operations are required.

[0148] In a possible implementation method, the liquid - level sensor is used to detect the liquid - level distribution in different areas. For example, multiple liquid - level sensors can be arranged in a large fuel tank to accurately grasp the changing trend of the liquid level through multi - point monitoring and avoid deviations caused by single - point measurement. This method is especially suitable for inclined fuel tanks or complex structures with multiple outlets.

[0149] The flowmeter module is mainly used to monitor the instantaneous flow rate of the liquid in the pipeline and provide basic data for the calculation of the cumulative filling volume. The flowmeter module ensures quantitative control of the filling process through high - speed data communication with the PLC, and at the same time provides the necessary technical support for the rapid detection and processing of flow anomalies. Generally, the output signals of the flowmeter module include two types: instantaneous flow rate and cumulative flow rate, and its signal characteristics are closely related to the type of the selected flowmeter.

[0150] As an independent functional unit, the flowmeter module is mainly responsible for the real-time monitoring of dynamic liquid flow. Different from other sensor modules such as pressure sensors and liquid level sensors, its monitoring object is the dynamic state of the liquid in the pipeline. By transmitting the flow data to the PLC in real time, the flowmeter module lays the foundation for the precise control of the intelligent filling system.

[0151] In this embodiment, the flowmeter module adopts a turbine flowmeter or an ultrasonic flowmeter, and the specific selection depends on the viscosity characteristics of the liquid to be filled and the pipeline operating conditions. The turbine flowmeter is suitable for low-viscosity liquids such as antifreeze; the ultrasonic flowmeter is suitable for high-viscosity liquids such as engine oil.

[0152] Specifically, the working principle of the turbine flowmeter is that the liquid flow drives the turbine blades to rotate, and the rotation speed is proportional to the flow rate. The sensor inside the flowmeter converts the rotation signal into a frequency signal, and the frequency directly reflects the instantaneous flow rate F(t). The ultrasonic flowmeter calculates the flow velocity by the influence of the liquid flow on the ultrasonic propagation velocity and further calculates the flow rate, which has the advantages of no mechanical components and being suitable for high-viscosity liquids.

[0153] Generally, the flowmeter module is installed in the middle of the filling pipeline, close to the outlet of the oil pump, to ensure the stability of liquid flow and the accuracy of data acquisition. As an option, the installation direction of the flowmeter module needs to be consistent with the liquid flow direction, and the straight pipe section length of the pipeline should meet the requirements of the flowmeter for the front and back flow disturbances to reduce the fluctuation of the flow data.

[0154] In this embodiment, the output signal of the flowmeter module is an analog signal or a pulse frequency signal.

[0155] As a possible implementation, the flowmeter module also has a signal filtering function to eliminate the signal fluctuations caused by fluid pulsation in the pipeline or external electromagnetic interference. By introducing a low-pass filter at the hardware or software level, the flowmeter module can output a more stable instantaneous flow signal to ensure the accuracy of the cumulative filling volume calculation.

[0156] In this embodiment, the flowmeter module is not only used for flow monitoring but also can achieve the rapid detection of flow anomalies. Specifically, the system sets a normal flow range F min ≤F(t)≤F max . When the instantaneous flow rate F(t) output by the flowmeter is lower than the lower limit value F min for a long time, the PLC judges whether there is a blockage or liquid exhaustion problem in the pipeline according to the signal of the flowmeter module; when F(t) exceeds the upper limit value F max , the system may identify that the pump is overloaded or the pipeline is broken.

[0157] As an option, when an abnormality occurs, the flowmeter module will immediately output an alarm signal, trigger an audible and visual alarm device through the PLC, and prompt the operator to conduct an inspection. In a possible implementation, the flowmeter module can more accurately determine the cause of the abnormality by combining the signals of the pressure sensor. For example, when the flow rate F(t) decreases and the pipeline pressure increases, it is usually caused by pipeline blockage; while when the flow rate F(t) decreases and the pipeline pressure decreases, it may be due to reduced pump efficiency or leakage.

[0158] In some embodiments, the real-time data of the flowmeter module can also be uploaded to a remote monitoring platform via an industrial Ethernet for trend analysis of the filling process and storage of historical records. For example, in large-scale industrial applications, multiple flowmeter modules can be simultaneously connected to the same remote platform, and the operator can view the flow status of each pipeline in real time at a remote terminal and adjust the system operation parameters as needed.

[0159] The main function of the oil pump control module is to ensure the stability and accuracy of the liquid transportation and filling process by controlling the start and stop of the oil pump. This module closely cooperates with the PLC and adjusts the operating state of the oil pump in real time through logical judgment and signal output. At the same time, the oil pump control module also forms a linkage with the flowmeter module and the sensor module to ensure the safety and efficiency of the entire filling system.

[0160] Generally, the oil pump control module receives start and stop signals from the PLC and realizes the operation control of the oil pump through the motor drive unit. The oil pump control module needs to adapt to the transportation characteristics of different liquid media, such as low-viscosity antifreeze and high-viscosity engine oil. Specifically, this module can dynamically adjust the start and stop of the oil pump according to the set filling parameters and operating state, and respond in a timely manner in case of abnormalities.

[0161] In the embodiment, the oil pump control module realizes start and stop control through the output relay or frequency converter interface of the PLC. Generally, the PLC calculates the target filling volume V set based on the parameters preset by the HMI and calculates the actual filling volume Q by monitoring the flowmeter signal F(t) cumulatively. When Q reaches V set , the PLC sends a stop signal to the oil pump control module, and the oil pump control module responds to the signal and stops running.

[0162] Specifically, the starting conditions of the oil pump are that all of the following conditions are met simultaneously:

[0163] The system has been initialized and there is no fault alarm;

[0164] The signal of the fuel tank liquid level sensor L > L min , that is, the liquid storage in the fuel tank is sufficient;

[0165] The signal of the pipeline pressure sensor is within the set range Pmin P≤P≤ max 。

[0166] The logic for the oil pump to stop includes, but is not limited to, the following situations:

[0167] The cumulative filling volume Q≥V set ;

[0168] The liquid level is lower than the safety threshold;

[0169] The oil pump is detected to be overloaded, and the current I pump >I rated ;

[0170] The signal of the flowmeter is abnormal.

[0171] As a safety design, the oil pump control module has built-in overload protection logic. When the operating current I of the oil pump motor pump exceeds the rated current I rated the module will immediately cut off the power supply of the oil pump and send a fault signal to the PLC. After receiving the signal, the PLC will display a prompt of "oil pump overload" on the HMI touch screen and trigger the audible and visual alarm unit to remind the operator.

[0172] In some embodiments, the oil pump control module also combines the signal of the pressure sensor for fault location. For example, when the pipeline pressure continues to rise during the operation of the oil pump but the signal F(t) of the flowmeter remains low, it may be an overload fault caused by pipeline blockage. In this case, the PLC will distinguish between the oil pump motor fault and the pipeline problem through logical judgment and guide the operator to carry out targeted processing.

[0173] In this embodiment, the oil pump control module supports the variable frequency speed regulation function, and adjusts the operating speed of the oil pump through the frequency converter to adapt to different filling requirements. Generally, for low-viscosity liquids (such as antifreeze), a higher operating speed can be adopted to improve the filling efficiency, while for high-viscosity liquids (such as engine oil), a lower operating speed is required to ensure stable flow.

[0174] As an implementation method, the speed adjustment of the oil pump can be achieved through the target flow rate F calculated by the PLC target The specific formula is:

[0175]

[0176] where V set is the target filling volume; T set is the target filling time.

[0177] The PLC adjusts the rotation speed of the oil pump according to the deviation of the real-time flowmeter F(t), thereby optimizing the filling efficiency and ensuring the quantitative accuracy.

[0178] The valve module is used to control the flow state of the liquid in the filling pipeline. By controlling the opening and closing of the solenoid valve, the valve module can achieve precise diversion and cutoff of the liquid, ensuring that the liquid only flows in the target pipeline, thereby realizing precise filling and avoiding leakage. The valve module is linked with the oil pump control module and the flowmeter module to form a complete liquid transportation and control chain. Its design not only needs to meet the response speed requirements of the system operation, but also takes into account the physical properties of the liquid medium and the pipeline structure.

[0179] Generally, the valve module consists of multiple solenoid valves, which are distributed and installed according to the flow direction requirements of different liquids. The PLC controls the opening and closing actions of the valves through output signals, and dynamically adjusts the valve state according to the real-time feedback of the flowmeter and pressure sensor, so as to realize the stable operation of the system.

[0180] In this embodiment, the core component of the valve module is the solenoid valve, which adopts a direct-acting or pilot-operated structure to meet the requirements of different working pressures and flows. The direct-acting solenoid valve is suitable for low-pressure or micro-fluid control, while the pilot-operated solenoid valve is suitable for high-pressure and large-flow working conditions. The material of the solenoid valve is selected as stainless steel with excellent corrosion resistance to adapt to the chemical properties of different liquid media such as antifreeze and engine oil.

[0181] As a design, the installation position of the valve module needs to be optimized in combination with the pipeline layout and flow direction logic. For example, at the intersection of the main transportation pipeline and the branch pipeline, a main control solenoid valve is usually installed to control the diversion of the liquid from the main pipeline to the branch pipeline. At the filling port, an end solenoid valve is installed to ensure that the liquid only flows into the target container when filling is required.

[0182] In this embodiment, the opening and closing state of the valve module is controlled by the PLC and dynamically adjusted according to the system operation state. Generally, the on-off signal of the solenoid valve is synchronized with the start-stop signal of the oil pump. When the oil pump starts, the PLC first opens the solenoid valve of the target pipeline; when the oil pump stops, the PLC closes all relevant solenoid valves to avoid leakage of residual liquid.

[0183] As an option, the valve module has a step-by-step closing function during the filling process. When the cumulative filling volume Q is close to the target value V set the PLC reduces the opening degree of the solenoid valve through hierarchical control to reduce the liquid flow rate in the pipeline, thereby improving the filling accuracy. The specific control logic is as follows:

[0184]

[0185] where α represents the opening degree ratio of the solenoid valve, and its value range is from 0 to 1, Q is the current cumulative filling volume; V set is the target filling volume.

[0186] In a possible implementation, the valve module can also be dynamically adjusted according to the real-time data of the flow meter. For example, when the flow rate F(t) exceeds the upper limit F max the PLC quickly reduces the opening of the solenoid valve to lower the flow rate; when the flow rate is lower than the lower limit F min the PLC determines that the pipeline is blocked or the liquid is exhausted and directly closes the solenoid valve to protect the system.

[0187] In this embodiment, the valve module has an action timeout protection function. When the solenoid valve fails to complete the opening and closing action within the set time, the PLC will record the abnormal signal and prompt the specific abnormal position through the HMI touch screen. As an extended design, the opening and closing signal of the solenoid valve can be monitored by feedback through a position sensor. For example, the limit switch installed on the actuator of the solenoid valve can monitor the actual state of the valve in real time and transmit the signal to the PLC for comparison.

[0188] In some embodiments, the valve module also combines with a pressure sensor to achieve fault diagnosis. For example, when the pressure sensor detects that the pressure in the target pipeline continues to rise while the flow meter shows a low flow rate, the system determines that the solenoid valve may not be fully opened and needs to be repaired. Similarly, when pressure fluctuations are still detected in the pipeline after the valve is closed, it may be that the valve seal fails and needs to be replaced in time.

[0189] In this embodiment, the valve module operates in coordination with other modules to achieve a rapid response to the system operating state. Specifically, it includes:

[0190] Linkage with the oil pump control module: Before the oil pump starts, the valve module ensures that the solenoid valve of the target pipeline is fully opened; after the oil pump stops, the solenoid valve is closed after a delay to drain the residual liquid.

[0191] Linkage with the flow meter module: When the flow meter detects abnormal flow, the valve module quickly adjusts the opening and closing state. For example, when the flow rate suddenly increases, the system can determine that the target container is approaching the full liquid level, and the valve module will give priority to closing the solenoid valve of the branch pipeline.

[0192] Linkage with the alarm module: When the solenoid valve malfunctions or there is liquid leakage, the valve module triggers an alarm signal and displays the abnormal position and type on the HMI interface.

[0193] In this embodiment, the maintenance design of the valve module emphasizes modularity and easy replaceability. Generally, the solenoid valve adopts a plug-and-play connector design, which is convenient for quick replacement in case of failure. The sealing material of the solenoid valve is made of fluororubber that is resistant to high temperature, high pressure, and chemical corrosion to extend its service life.

[0194] As an optimized design, the valve module can improve the operating efficiency through intelligent control algorithms. For example, in a multi-pipeline system, priority logic can be adopted to dynamically allocate the switching states of solenoid valves, reducing unnecessary energy consumption and improving the filling efficiency.

[0195] The touch control module is the core part of the human-machine interaction of the intelligent filling system of the present invention, providing the operator with the functions of real-time monitoring of the system operating status and dynamic setting of filling parameters. This module is connected to the PLC module through the graphical interface of the touch screen (HMI), displaying system information in an intuitive and friendly manner, while allowing the operator to input or adjust operating parameters, thereby achieving comprehensive control of the entire filling process. The touch control module also integrates alarm prompts, data recording, and operating status display functions, providing rich operation support for the operator.

[0196] Generally, the touch control module communicates with the PLC module through industrial Ethernet or a serial interface, receiving data from the sensor module, flowmeter module, and valve module in real time, and at the same time quickly transmitting the instructions input by the operator to the PLC for processing. Through the touch control module, the operator can flexibly control the operation of the filling equipment, view the current system status in real time, and obtain alarm information and solution prompts in a timely manner when a fault occurs.

[0197] In this embodiment, the core component of the touch control module is an industrial touch screen (HMI), which uses a color liquid crystal display, and the screen size is generally between 7 inches and 10 inches to provide sufficient operation vision. The touch interface is based on a modular design, and partitions and displays the system operating status, parameter settings, alarm information, and historical data.

[0198] The input method of the touch control module is capacitive multi-touch, which can identify multiple touch points at the same time to support complex operation logics. To improve the operation accuracy, the touch control module adopts an anti-mis-touch design and optimizes the touch sensitivity according to the requirements of the industrial scenario.

[0199] Specifically, the signal processing logic of the touch control module includes the following steps:

[0200] The touch signals input by the operator are collected by the capacitive sensor and converted into digital signals;

[0201] After the digital signals are filtered and logically operated, they are compared with the current system status data;

[0202] The processed instructions are transmitted to the PLC module through industrial Ethernet to adjust the operating parameters of the equipment in real time.

[0203] In this embodiment, the touch control module has the ability to handle exceptions. When the communication signal of the touch control module is interrupted or the hardware fails, the system will automatically switch to the default filling process and continue to complete the filling task through the preset parameters inside the PLC. At the same time, a "communication exception" prompt will pop up on the touch control interface, asking the operator to check the module status as soon as possible.

[0204] In some embodiments, the touch control module also supports the multi-user permission management function. For example, operators with different permission levels can access different function interfaces. Ordinary operators can only view the running status and input basic parameters, while advanced users or maintenance personnel can access advanced functions such as data recording, parameter calibration, and hardware diagnosis.

[0205] In a possible implementation manner, the touch control module integrates the remote monitoring function. By connecting to the industrial Ethernet, the operator can view the touch control interface in real time on the remote terminal and even operate the system through the network. This design is suitable for distributed industrial scenarios. For example, when multiple filling systems are running simultaneously, the operator can remotely manage all devices in the central control room.

[0206] In this embodiment, the touch control module adopts an embedded installation design and can be directly embedded in the control cabinet panel, which is convenient for the operator to observe and operate. The electrical interface of the touch control module adopts a modular design, which is convenient for quick replacement and repair.

[0207] As an optimized design, the display screen of the touch control module is treated with anti-glare to improve readability in strong light environments. At the same time, its surface is covered with scratch-resistant tempered glass to adapt to the complex conditions in the industrial environment.

[0208] The industrial Ethernet module is used to achieve efficient data transmission and real-time interaction between various modules within the system. Its main task is to connect functional units such as the PLC module, sensor module, flowmeter module, valve module, oil pump control module, and touch control module, ensuring accurate data transfer between modules and synchronous and orderly system operation. Through the high-speed communication ability of the industrial Ethernet, the system can complete signal acquisition, logical judgment, and distribution of control instructions in real time, thereby improving the overall operation efficiency and reliability.

[0209] Generally, the industrial Ethernet module constructs a local area network environment through a switch device and connects each module in a star topology structure. By adopting a communication method that supports industrial protocols, the industrial Ethernet module can be compatible with different types of device interfaces, ensuring the scalability and stability of the system.

[0210] The core components of the industrial Ethernet module include an industrial switch, an Ethernet communication interface, and network cables. The industrial switch is the hub device of the entire network, responsible for managing the data traffic between modules in the system. The switch usually selects industrial equipment with a high protection level (such as IP65 or higher) to adapt to complex industrial environments.

[0211] As an option, the communication interface of the industrial Ethernet module uses RJ45 or fiber optic interfaces, and the selection is based on the specific equipment layout and transmission distance. For example, in scenarios with a short distance, ordinary gigabit network cables can meet the requirements; while in scenarios with a long transmission distance, fiber optic interfaces can be selected to reduce signal attenuation.

[0212] Specifically, the network cabling of the industrial Ethernet module needs to be optimized according to the physical location and functional requirements of the equipment. Generally, network cabling should avoid being arranged in parallel with high-voltage cables to reduce the impact of electromagnetic interference on signal transmission. Inside the control cabinet of the filling system, the industrial switch is usually installed near the PLC module for easy centralized management and debugging.

[0213] In this embodiment, the industrial Ethernet module supports the full-duplex communication mode to achieve simultaneous sending and receiving of data. Through the port management function of the switch, each module can exchange data with a fixed communication cycle to ensure real-time performance and synchronization.

[0214] Specifically, the communication tasks of the industrial Ethernet module mainly include the following aspects:

[0215] Data acquisition and distribution: Real-time receive monitoring data from sensor modules and flowmeter modules, including parameters such as liquid level, pressure, and instantaneous flow rate. After being processed by the PLC, send control instructions to the oil pump control module and valve module.

[0216] Status feedback: Real-time transmit the operating status of each actuator to the touch module for the operator to monitor and adjust. For example, the start / stop status of the oil pump, the open / close position of the valve, and the real-time flow rate value of the flowmeter are all transmitted to the touch interface through the industrial Ethernet.

[0217] Alarm transmission: When a fault occurs in the system, the industrial Ethernet module is responsible for quickly transmitting the alarm signal to the PLC and touch module, and at the same time triggering the audible and visual alarm device. For example, when the flowmeter detects abnormal flow or the sensor module monitors insufficient liquid level, the alarm information will be transmitted to all relevant modules within milliseconds.

[0218] In this embodiment, the industrial Ethernet module has link redundancy and failover functions. When a communication link is interrupted, the module will automatically switch to the standby link through the built-in fast switching mechanism to ensure the normal operation of the system. As an implementation method, the industrial Ethernet module adopts a ring network topology and enables the Spanning Tree Protocol (STP) to prevent the formation of network loops.

[0219] Specifically, when a communication failure occurs at a certain port of the switch, the STP protocol will quickly recalculate the data transmission path and usually complete the link recovery within 50 milliseconds. This design significantly improves the fault tolerance of the network and is suitable for scenarios of frequent electromagnetic interference and physical damage in industrial environments.

[0220] In terms of security, the industrial Ethernet module supports access control lists (ACLs) and firewall functions to prevent unauthorized devices from accessing the network. For example, the switch can restrict access rights based on the MAC address or IP address of the device to ensure that only legitimate devices within the system can participate in communication.

[0221] In this embodiment, the communication protocol of the industrial Ethernet module supports the transmission of multiple data formats, including analog data, digital data, and alarm signals, etc. Through the data processing function of the PLC, the module can achieve data grouping management and real-time update. For example, the analog signal of the liquid level sensor and the digital signal of the valve module can be transmitted on the same communication link and allocated to different storage areas according to the module functions.

[0222] In this embodiment, the industrial Ethernet module adopts a modular design, which is convenient for installation and maintenance. Generally, hardware failures of the switch and communication interfaces can be quickly replaced by hot-swapping without interrupting the operation of the system. For complex industrial environments, anti-interference filters are also equipped inside the module to reduce the impact of external electromagnetic interference on signal transmission.

[0223] In this embodiment, the triggering condition of the audible and visual alarm module is sent to the alarm module by the PLC module after judging according to the preset logic. Generally, the alarm signal comes from the abnormal detection of the sensor module, flowmeter module, or valve module. For example, when the liquid level sensor detects that the liquid level is lower than the threshold L min , the PLC will send a low liquid level alarm signal to the audible and visual alarm module, and the module will immediately start the low-level alarm mode.

[0224] In this embodiment, the audible and visual alarm module has a self-check function to monitor its own operating status and signal transmission quality. For example, when the system starts up, the module will automatically check whether the functions of the buzzer and warning light are normal and feedback the test results to the PLC. If an abnormality is found, the system will prompt "Alarm module failure" on the HMI interface and suggest that the operator check or replace the device.

[0225] As a design, the audible and visual alarm module also supports signal redundant transmission function. When the communication between the PLC and the alarm module is interrupted, the module will automatically enter the default alarm mode and maintain the last alarm status to ensure that the alarm signal will not be lost due to communication failure. For example, when the flow rate is abnormal, even if the signal between the PLC and the alarm module is interrupted, the module can still keep the yellow light flashing and beeping through its built-in logic until the operator manually resets it.

[0226] In this embodiment, the audible and visual alarm module forms a linkage with the PLC and other modules through industrial Ethernet. For example, when the oil pump module detects that the current I pump exceeds the rated value I rated , the PLC will trigger a high-priority alarm of the audible and visual alarm module and display the overload alarm information through the HMI interface. At this time, the audible and visual alarm module will give priority to activating the red light flashing and emitting a rapid beep to remind the operator to check the status of the oil pump in time.

[0227] In a possible design, the audible and visual alarm module also cooperates with the touch module. When the operator confirms the alarm through the HMI interface, the module will automatically reduce the alarm intensity. For example, the red light flashing can be switched to a constant on state, and the beep interval time can be extended to reduce the interference to the operation environment.

[0228] In this embodiment, the design of the audible and visual alarm module emphasizes easy maintenance. For example, both the warning light and the buzzer adopt pluggable connections, which are convenient for quick replacement. The shell of the module is made of high-strength ABS material, with dustproof and waterproof performance, suitable for harsh industrial environments.

[0229] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent filling system, characterized in that: include: PLC module for logic control and data processing; A sensor module for real-time monitoring of the liquid levels of the antifreeze tank and the engine oil tank through a liquid level sensor; A flow meter module, used to detect the flow of antifreeze and engine oil through a flow meter; An oil pump control module, used for delivering antifreeze or engine oil through an oil pump; Valve module, used to control the flow of antifreeze or oil through solenoid valve; Touch control module, used for parameter setting, operation status display and alarm prompt through HMI touch screen; Industrial Ethernet module, used to realize the communication between PLC module and other components; Sound and light alarm module, used to indicate abnormal operation or failure; Among them, the PLC module controls the start and stop of the oil pump and the solenoid valve according to the filling parameters input by the touch module, and monitors the operating status in real time according to the data of the flow meter and the liquid level sensor; when the filling is completed or an abnormality occurs, an alarm is triggered or the operation is stopped.

2. The intelligent filling system according to claim 1, characterized in that: The PLC module collects the instantaneous flow rate F(t) of the flow meter in real time and calculates the cumulative filling volume Q by the following formula: Among them, Q is the cumulative filling amount, F(t i ) is the instantaneous flow rate of the i-th sampling, Δt is the sampling time interval, and N is the number of sampling times; When the cumulative filling amount Q reaches the set value, the PLC module closes the solenoid valve and stops the oil pump.

3. The intelligent filling system according to claim 1, characterized in that: The liquid level sensor is used to monitor the tank liquid level in real time. When the liquid level is lower than the preset value L min When the liquid level reaches the set upper limit value L, the PLC module triggers an audible and visual alarm and replenishes the liquid from the temporary storage tank to the main tank through the replenishment pump; max When the PLC module controls the replenishment pump to stop running.

4. The intelligent filling system according to claim 1, characterized in that: The HMI touch screen is used to set the following parameters: Generator model and power range; Target filling capacity V of antifreeze or engine oil set ; Pipeline pressure upper and lower limits P max and P min ; The upper and lower limits of the oil tank level alarm L max and L min ; It also displays the following information in real time: System operation status; Cumulative filling volume Q; Fuel tank level status; Fault alarm information and fault location.

5. The intelligent filling system according to claim 1, characterized in that: The industrial Ethernet module realizes the following real-time data interaction through the PLC module: The data from the level sensor and flow meter are uploaded to the HMI touch screen; The operation instructions input by the HMI touch screen are sent to the PLC module; The logic control signal of the PLC module is transmitted to the oil pump and solenoid valve; System operation and alarm status data are synchronized to remote devices.

6. The intelligent filling system according to claim 5, characterized in that: The PLC module has a fault detection function. When any of the following faults occurs, an audible and visual alarm is triggered and the operation stops: Oil pump overload: Oil pump current I pump >I rated ; The solenoid valve action timeout; Flow meter signal abnormality: flow rate F(t)<F min ; Abnormal liquid level sensor signal: liquid level L>L max Or L<L min ; Abnormal pipeline pressure: pressure P>P max Or P<P min .

7. The intelligent filling system according to claim 1, characterized in that: The sound and light alarm module includes a red warning light and a buzzer: The red warning light flashes to indicate a fault condition; The buzzer beeps rapidly once per second to alert the operator to the urgency of the fault; When the sound and light alarm module starts to sound an alarm, the HMI touch screen interface displays the specific cause of the fault and the fault location.

8. The intelligent filling system according to claim 1, characterized in that: The PLC module controls the filling process, which includes the following steps: S1. According to the filling parameters input by HMI, the PLC module controls the oil pump to start and open the solenoid valve; S2, the flow meter monitors the flow rate F(t) in real time and accumulates and calculates the total filling amount Q; S3, when Q ≥ target filling amount, the PLC module controls to close the solenoid valve and stop the oil pump; S4. HMI displays the "filling completed" status and records the filling parameters; S5. When it is detected that refilling is needed, the operator can input the refilling instruction through the touch screen of the temporary water replenishment tank in the test room. The PLC module controls the refilling pump to transport the antifreeze from the temporary water replenishment tank to the main system to realize the temporary refilling operation.

9. An intelligent filling system according to any one of claims 1 to 8, characterized in that: The system has data recording functions, including: Time of each filling, filling volume Q, and pressure change curve; The operating status of the oil pump and solenoid valve; Real-time data from level sensors and flow meters; Type, time and location of fault alarms; The data is exported through the HMI interface for subsequent analysis and maintenance.

10. An intelligent filling system according to any one of claims 1 to 8, characterized in that: The system supports multi-model parameter settings, and stores antifreeze or oil filling parameters of different models through HMI, including target filling amount, minimum flow rate F min , Pressure upper and lower limits P min and P max , you can quickly call and switch the filling mode.

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