Control method and device for hydraulic pump station of intelligent chassis, medium and electronic equipment

Abstract

The embodiment of the invention provides a hydraulic pump station control method and device of an intelligent chassis, a medium and electronic equipment, and is applied to the technical field of hydraulic pump station control. The method comprises the steps that the output flow and the interference flow of a hydraulic pump station are obtained, and the effective flow is determined according to the output flow and the interference flow; the load state of the hydraulic pump station is obtained, and the load demand flow is determined according to the load state of the hydraulic pump station; and starting and stopping control is conducted on a hydraulic pump in the hydraulic pump station according to the effective flow and the load demand flow. Therefore, by means of the self-adaptive control algorithm and the dynamic start-stop strategy, the hydraulic pump station can accurately meet the load requirement, energy consumption is remarkably reduced, and energy conservation and consumption reduction are achieved.

Description

Technical Field

[0001] This application relates to the field of intelligent control technology for hydraulic pump stations, and in particular to a hydraulic pump station control method, device, medium, and electronic equipment for an intelligent chassis. Background Technology

[0002] The hydraulic pump station is the core device in the laboratory that provides power to hydraulic equipment. It converts mechanical energy into hydraulic energy through a hydraulic pump, providing stable pressure and flow to the test equipment.

[0003] In related technologies, hydraulic pump stations typically output flow and pressure at a fixed flow rate to meet the load requirements of external equipment. However, because the required flow and pressure of external equipment change over time during testing, this method usually starts all hydraulic pumps to meet the maximum required flow and pressure, resulting in the output flow of the hydraulic pump station being far greater than the actual demand, causing serious energy waste. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art. Therefore, the purpose of this application is to propose a hydraulic pump station control method, device, medium, and electronic equipment for an intelligent chassis. By acquiring and accurately calculating the flow data of the hydraulic pump station, the start and stop of the hydraulic pump are dynamically adjusted to achieve efficient and economical operation of the hydraulic system, avoid resource waste, and improve system stability and adaptability.

[0005] To achieve the above objectives, the first aspect of this application proposes a hydraulic pump station control method for an intelligent chassis. The method includes: acquiring the output flow rate and interference flow rate of the hydraulic pump station, and determining the effective flow rate based on the output flow rate and interference flow rate; acquiring the load status of the hydraulic pump station, and determining the load demand flow rate based on the load status of the hydraulic pump station; and controlling the start and stop of the hydraulic pump in the hydraulic pump station based on the effective flow rate and the load demand flow rate.

[0006] According to one embodiment of this application, a hydraulic pump station is connected to multiple load devices. Obtaining the output flow rate and interference flow rate of the hydraulic pump station includes: installing and debugging flow meters on the high-pressure oil pipe and return oil pipe of the hydraulic pump station respectively; if the flow meter debugging is successful, controlling the hydraulic pump station to start and controlling the multiple load devices to shut down, so as to obtain the basic overflow flow rate through the flow meter on the return oil pipe; during the opening process of at least one load device, obtaining the output flow rate through the flow meter on the high-pressure oil pipe, and determining the interference flow rate based on the total number of opened load devices and the basic overflow flow rate.

[0007] According to one embodiment of this application, determining the interference flow based on the total number of at least one load device in operation and the basic overflow flow includes: obtaining the product between the total number of devices in operation and a preset coefficient to obtain a first interference flow; and obtaining the sum of the basic overflow flow and the first interference flow to obtain the interference flow.

[0008] According to one embodiment of this application, the load device is a hydraulic actuator using a servo valve. The load state of the hydraulic pump station is the operating state of the servo valve of each hydraulic actuator. Determining the load demand flow rate based on the load state of the hydraulic pump station includes: acquiring the operating voltage of the servo valve of each hydraulic actuator; identifying the operating state of the servo valve of the corresponding hydraulic actuator based on the operating voltage of the servo valve of each hydraulic actuator; determining the total number of servo valves in the open state based on the operating state of the servo valve of each hydraulic actuator; determining the preset demand flow rate of the hydraulic actuator; and obtaining the product of the total number of servo valves and the preset demand flow rate to obtain the load demand flow rate.

[0009] According to one embodiment of this application, determining the preset required flow rate of a hydraulic actuator includes: calculating the piston area of ​​the hydraulic actuator based on the piston diameter of the hydraulic actuator to determine the effective area of ​​the hydraulic actuator; and obtaining the product between the effective area and the preset maximum speed of the hydraulic actuator to determine the preset required flow rate.

[0010] According to one embodiment of this application, after controlling the start-stop of the hydraulic pumps in the hydraulic pump station based on the effective flow rate and the load demand flow rate, the hydraulic pump station control method of the intelligent chassis further includes: obtaining the actual opening degree of each servo valve in the open state; determining the actual demand flow rate based on the actual opening degree of each servo valve in the open state; determining the required number of hydraulic pumps based on the actual demand flow rate and the flow rate of a single hydraulic pump in the hydraulic pump station; and adjusting the start-stop of the hydraulic pumps in the hydraulic pump station based on the required number of hydraulic pumps.

[0011] According to one embodiment of this application, determining the required number of hydraulic pumps based on the actual required flow rate and the flow rate of a single hydraulic pump in a hydraulic pump station includes: obtaining the ratio between the actual required flow rate and the flow rate of a single hydraulic pump to obtain a first value; rounding the first value to obtain a second value; and adding one to the second value to obtain the required number of hydraulic pumps.

[0012] To achieve the above objectives, a second aspect of this application provides a computer-readable storage medium storing a control program for a hydraulic pump station, which, when executed by a processor, implements the hydraulic pump station control method according to the aforementioned intelligent chassis.

[0013] To achieve the above objectives, a third aspect of this application provides a hydraulic pump station control device for an intelligent chassis, comprising: a first acquisition module for acquiring the output flow and interference flow of the hydraulic pump station, and determining the effective flow based on the output flow and interference flow; a second acquisition module for acquiring the load status of the hydraulic pump station, and determining the load demand flow based on the load status of the hydraulic pump station; and a control module for controlling the start and stop of the hydraulic pump in the hydraulic pump station based on the effective flow and the load demand flow.

[0014] To achieve the above objectives, a fourth aspect of this application provides an electronic device, including a memory, a processor, and a control program for a hydraulic pump station stored in the memory and executable on the processor. When the processor executes the control program for the hydraulic pump station, it implements the aforementioned hydraulic pump station control method for an intelligent chassis.

[0015] The hydraulic pump station control method, device, medium, and electronic equipment of the intelligent chassis according to embodiments of this application determine the effective flow rate by acquiring the output flow rate and interference flow rate of the hydraulic pump station, determine the load demand flow rate according to the load status, and determine the required number of hydraulic pumps based on the actual demand flow rate and the flow rate of a single hydraulic pump in the hydraulic pump station, thereby controlling the start and stop of the hydraulic pumps. Thus, by monitoring the flow demand of external equipment in real time and dynamically adjusting the operating status of the hydraulic pumps, precise matching of load demand is achieved, effectively improving the energy utilization efficiency of the system and reducing energy consumption. Simultaneously, it reduces equipment wear, extends service life, and lowers maintenance costs, providing a reliable guarantee for the stable operation of the hydraulic system under complex working conditions. Attached Figure Description

[0016] Figure 1 The flowchart shows a hydraulic pump station control method for an intelligent chassis according to some embodiments of this application. Figure 2 This is a flowchart of a hydraulic pump station control method for an intelligent chassis according to a specific embodiment of this application; Figure 3 This is a block diagram of a hydraulic pump station control device for an intelligent chassis according to some embodiments of this application; Figure 4 This is a block diagram of an electronic device according to some embodiments of this application. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0018] Hydraulic pump stations are the core devices in laboratories that provide power to hydraulic equipment. They convert mechanical energy into hydraulic energy through hydraulic pumps, providing stable pressure and flow to the testing equipment. During testing, the hydraulic pump station needs to dynamically adjust its output flow and pressure according to the load requirements of external equipment to ensure the accuracy and stability of the test. However, traditional hydraulic pump stations typically use fixed flow rates or simple start-stop control methods, which have several problems: 1. Serious energy waste. Because the flow rate and pressure required by external equipment change over time during the test, and traditional pump stations often start all hydraulic pumps, the output flow rate is much greater than the actual demand. 2. Shortened motor lifespan: Long-term high-load operation causes frequent start-stop or full-load operation of the motor, resulting in excessive temperature rise and accelerated wear. 3. High operating costs, energy waste and equipment wear and tear directly increase costs, and frequent maintenance and replacement of motors also increase the economic burden on the laboratory; 4. Low control precision, lack of intelligent flow and pressure regulation mechanisms, and inability to accurately control according to the real-time needs of external devices, resulting in low system efficiency. Among related technologies, the solutions to the energy-saving problem of hydraulic pump stations mainly adopt the following three technologies: 1. Variable frequency control technology controls the output flow of the hydraulic pump by adjusting the motor speed. However, this solution has high performance requirements for the motor and hydraulic pump, and the application cost is also high. 2. Load-sensitive control technology adjusts the hydraulic pump output according to load demand, but this method has extremely high requirements for system response speed and stability, making it difficult to achieve precise control in complex and ever-changing test environments; 3. Multi-pump parallel control technology, which matches the load demand by manually starting and stopping different numbers of hydraulic pumps, still has problems such as wasted manpower and insufficient control precision.

[0019] Based on the above analysis, although the solutions adopted by the relevant technologies have alleviated the energy waste problem of hydraulic pump stations to a certain extent, they still have drawbacks such as low control precision, large equipment wear and tear, and high operating costs.

[0020] To address at least one of the aforementioned technical problems, this application proposes a hydraulic pump station control method for an intelligent chassis. By acquiring the output flow and interference flow of the hydraulic pump station to determine the effective flow, and combining it with the load demand flow determined based on the load status, the operating status of the hydraulic pump is dynamically adjusted to achieve precise matching of load demand. This effectively improves the energy utilization efficiency of the system, reduces energy consumption, and reduces the need for staff intervention, thereby lowering human resource costs. Ultimately, this extends the service life of the motor, saves energy, reduces operating costs, and improves work efficiency.

[0021] The hydraulic pump station control method of the intelligent chassis in this application embodiment can be implemented by control units such as MCU (Microcontroller Unit) and PLC (Programmable Logic Controller). The following description, taking the hydraulic pump station control method of this intelligent chassis executed by a PLC as an example, will be detailed with reference to the accompanying drawings. A PLC is a digital electronic device designed for industrial applications to control various machines and processes. It receives external input signals (such as sensor data), processes pre-written logic programs, and outputs control signals to drive actuators (such as motors and valves) to achieve automated control. PLCs are widely used in modern industrial automation due to their high reliability, flexible programming capabilities, and strong anti-interference capabilities.

[0022] Figure 1 This is a flowchart of a hydraulic pump station control method for an intelligent chassis according to some embodiments of this application.

[0023] Reference Figure 1 The hydraulic pump station control method of this intelligent chassis includes: S1, obtain the output flow and interference flow of the hydraulic pump station, and determine the effective flow based on the output flow and interference flow.

[0024] The hydraulic pump station provides power to the hydraulic oil and dynamically starts and stops according to PLC commands to precisely match load requirements. Output flow rate refers to the volume of hydraulic oil output from the hydraulic pump station per unit time; for example, the output flow rate is 100 L / min. Interference flow rate refers to the hydraulic oil other than that supplied to the load per unit time, including the hydraulic oil required for system maintenance and the hydraulic oil flowing back to the tank through the relief valve when the hydraulic oil pressure exceeds a predetermined load value. Interference flow rate can be obtained through a flow meter installed on the return oil pipe or calculated based on a preset relationship.

[0025] After obtaining the output flow and interference flow of the hydraulic pump station, the PLC determines the effective flow based on the flow difference between the output flow and the interference flow. The effective flow refers to the flow of hydraulic oil supplied to the load.

[0026] S2, obtain the load status of the hydraulic pump station, and determine the load demand flow rate based on the load status of the hydraulic pump station.

[0027] Specifically, the load status of the hydraulic pump station can be determined based on the start / stop status of the load or the status of the servo valve corresponding to each load. Then, the loads in the running state are identified based on the load status of the hydraulic pump station, and the load demand flow of the hydraulic pump station is obtained based on the demand flow of each load in the running state.

[0028] S3 controls the start and stop of the hydraulic pumps in the hydraulic pump station based on the effective flow rate and the load demand flow rate.

[0029] Specifically, the PLC dynamically controls the start and stop of hydraulic pumps in the hydraulic pump station based on the effective flow rate and the load demand flow rate. For example, when the effective flow rate is less than the load demand flow rate, the PLC controls the hydraulic pumps that are in a stopped state to start as a supplementary measure. When the effective flow rate is greater than the load demand flow rate and the flow rate difference is large, the PLC controls one or more of the hydraulic pumps that are in a started state to stop. The number of additional starts or stops of hydraulic pumps can be determined based on the flow rate difference between the effective flow rate and the load demand flow rate to match the effective flow rate with the load demand flow rate, thereby reducing energy consumption while meeting the load flow rate requirement. It can be understood that, to ensure operational effectiveness, the effective flow rate is kept greater than the load demand flow rate by a certain value to provide redundancy fluctuation margin.

[0030] In this embodiment, the PLC determines the effective flow rate based on the collected output flow rate and overflow flow rate data of the hydraulic pump station. It then determines the load demand flow rate based on the load status. Combining the effective flow rate and the load demand flow rate, the PLC controls the start and stop of the hydraulic pumps in the hydraulic pump station. Thus, through the PLC's automated control, the operating status of the hydraulic pump station is monitored and adjusted in real time, ensuring the efficient operation of the hydraulic system and the effective utilization of energy, achieving precise matching of load demands. Its technical effects include achieving automated start and stop control of the hydraulic pump station, improving system operating efficiency, reducing energy waste, lowering operating costs, extending the service life of the hydraulic pumps, reducing equipment maintenance costs, improving system stability and reliability, and ensuring the normal operation of the hydraulic system under different working conditions.

[0031] In some embodiments, to improve the operation control effect of the hydraulic pump station, pressure sensors can be used to measure the operating pressure data of the hydraulic pump station and monitor the system pressure status in real time; temperature sensors can be used to measure the operating hydraulic oil temperature data of the hydraulic pump station to prevent overheating damage; differential pressure sensors can be used to measure the internal and external pressure difference of the hydraulic pump station filter, and the degree of hydraulic oil contamination can be judged by the differential pressure to provide early warning of hydraulic oil status; water molecule detection sensors can be used to measure the water content of the hydraulic oil in the hydraulic pump station to prevent hydraulic oil emulsification from affecting system performance. The PLC is connected to the pressure sensor, temperature sensor, differential pressure sensor, water molecule detection sensor and intelligent panel respectively. The intelligent panel displays the operating status of the hydraulic pump station in real time, such as the start-up status of the hydraulic pump, running time, operating pressure, running flow, and data collected by the above sensors such as operating temperature and hydraulic oil contamination degree, and records and displays operating data, such as displaying alarm parameters when equipment failure occurs.

[0032] In some embodiments of this application, the hydraulic pump station is connected to multiple load devices. Obtaining the output flow rate and interference flow rate of the hydraulic pump station includes: installing and debugging flow meters on the high-pressure oil pipe and return oil pipe of the hydraulic pump station respectively; if the flow meter debugging is successful, controlling the hydraulic pump station to start and controlling the multiple load devices to shut down, so as to obtain the basic overflow flow rate through the flow meter on the return oil pipe; during the opening process of at least one load device, obtaining the output flow rate through the flow meter on the high-pressure oil pipe, and determining the interference flow rate based on the total number of at least one load device opened and the basic overflow flow rate.

[0033] The high-pressure oil pipe of a hydraulic pump station is a pipeline used to transport high-pressure hydraulic oil in a hydraulic system. It is usually located at the top or bottom of the cylinder and is responsible for transporting high-pressure fluid. The output flow rate of the hydraulic pump station can be obtained by a flow meter installed on the high-pressure oil pipe. The return oil pipe of the hydraulic pump station is responsible for returning the used hydraulic oil to the oil tank. It is usually directly connected to the oil tank and plays a role in recovering and recycling hydraulic oil. The return flow rate of the hydraulic pump station can be obtained by a flow meter installed on the return oil pipe.

[0034] In this embodiment, a high-precision flow meter is used to measure the flow data of the high-pressure oil pipe and the return oil pipe in real time, and transmit the data to the analog module to provide basic data support for the adaptive control algorithm. The analog module converts the analog signals collected by the flow meter and other sensors into digital signals that can be processed by the PLC and transmits them to the PLC. The flow meter needs to be installed on the side of the corresponding oil pipe to avoid gaps above the pipe due to insufficient flow or sedimentation at the bottom, which could affect the measurement results and ensure that the measurement data accurately reflects the system flow status.

[0035] The basic overflow flow rate refers to the return flow rate of a hydraulic pump station under conditions of no external load interference. Specifically, when the hydraulic pump station is in static operation mode, i.e., all load equipment is turned off, the hydraulic oil will still circulate within the hydraulic pump station. The return flow rate of the hydraulic pump station at this time is the basic overflow flow rate. The basic overflow flow rate provides an important reference for the real-time monitoring and calculation of the overflow flow rate during subsequent dynamic operation.

[0036] Specifically, first, select suitable locations and install high-precision flow meters on both the high-pressure oil pipe and the return oil pipe. Debug the flow meters and confirm their functionality against preset flow rate targets. If not, reinstall them until the flow rate targets indicate normal function, confirming successful debugging. Then, with the flow meters successfully debugged, start the hydraulic pump station while keeping all connected load devices off. Under conditions of no external load interference, obtain the basic overflow flow rate through the flow meter on the return oil pipe. During actual operation of the hydraulic pump station, the PLC obtains the actual output flow rate based on the flow meter on the high-pressure oil pipe. Based on the basic overflow flow rate and the total number of actually activated load devices, it estimates the system's interference flow rate for subsequent start / stop control of the hydraulic pump station.

[0037] This embodiment ensures the accuracy of flow measurement through the installation and debugging of the flow meter. During operation, the output flow is measured in real time by a high-pressure oil pipe flow meter. The interference flow under the current state is estimated based on the number of load devices in operation and the basic overflow flow, which is used for the start and stop control of the hydraulic pump station. This achieves precise control of the hydraulic pump station, ensures the stable operation of the system under different load conditions, reduces energy waste, extends equipment service life, and reduces operating costs.

[0038] In some embodiments of this application, determining the interference flow based on the total number of at least one load device in operation and the basic overflow flow includes: obtaining the product between the total number of devices in operation and a preset coefficient to obtain a first interference flow; and obtaining the sum of the basic overflow flow and the first interference flow to obtain the interference flow.

[0039] Specifically, with at least one load device in operation, the interference flow is determined based on the total number of load devices in operation and the basic overflow flow. Further, the total number of load devices in operation (denoted as x) is first obtained, and multiplied by a preset coefficient (denoted as k) to obtain the first interference flow (denoted as x*k). Then, the basic overflow flow (denoted as L0) is obtained and added to the first interference flow x*k to obtain the interference flow (denoted as L), i.e., L = L0 + x*k.

[0040] This allows for the precise calculation of the interference flow, providing a basis for the accurate control of the hydraulic pump station and enabling efficient management of the hydraulic system and effective utilization of energy.

[0041] In some embodiments of this application, the load device is a hydraulic actuator using a servo valve. The load state of the hydraulic pump station is the working state of the servo valve of each hydraulic actuator. Determining the load demand flow rate based on the load state of the hydraulic pump station includes: acquiring the working voltage of the servo valve of each hydraulic actuator; identifying the working state of the servo valve of the corresponding hydraulic actuator based on the working voltage of the servo valve of each hydraulic actuator; determining the total number of servo valves in the open state based on the working state of the servo valve of each hydraulic actuator; determining the preset demand flow rate of the hydraulic actuator; and obtaining the product of the total number of servo valves and the preset demand flow rate to obtain the load demand flow rate.

[0042] For example, the standard operating power supply W of the servo valve of the hydraulic actuator is either ±40mA or ±10V. The load demand flow of the load equipment depends on the load status of the hydraulic pump station (such as the opening degree of the servo valve). When the servo valve operating power supply is 0mA or 0V, the servo valve is in the closed state; when the servo valve operating power supply is +40mA and +10V, the servo valve is at the maximum positive opening degree; when the servo valve operating power supply is -40mA and -10V, the servo valve is at the maximum reverse opening degree.

[0043] In the control process of the hydraulic pump station, the working voltage of the servo valve of each hydraulic actuator is first obtained. Then, the working state of the servo valve of the corresponding hydraulic actuator is identified according to the working voltage of the servo valve of each hydraulic actuator. For example, when the working voltage of the servo valve is 0V, it is determined that the servo valve is in the closed state. When the working voltage of the servo valve is not 0V, it is determined that the servo valve is in the open state (open or closed). Then, the total number of servo valves in the open state is determined according to the working state of the servo valve of each hydraulic actuator. Finally, the preset demand flow of the hydraulic actuator is determined, and the product of the total number of servo valves and the preset demand flow is obtained as the load demand flow of the hydraulic pump station.

[0044] By acquiring the operating voltage of the servo valves of each hydraulic actuator, identifying the operating status of the servo valves, determining the total number of servo valves in the open state, and then calculating the load demand flow, the actual demand flow of the hydraulic system can be accurately determined. This provides a basis for precise control of the hydraulic pump station, enabling efficient management of the hydraulic system and effective utilization of energy. It improves the control accuracy and response speed of the hydraulic system, ensures stable operation under different working conditions, reduces energy waste, and lowers operating costs.

[0045] In some embodiments of this application, determining the preset required flow rate of the hydraulic actuator includes: calculating the piston area of ​​the hydraulic actuator based on the piston diameter of the hydraulic actuator to determine the effective area of ​​the hydraulic actuator; and obtaining the product between the effective area and the preset maximum speed of the hydraulic actuator to determine the preset required flow rate.

[0046] Taking a double-acting hydraulic actuator as an example, the effective area of ​​the double-acting actuator when extended is the piston area, and its calculation formula is: A = (π * D²) / 4, Where D is the piston diameter of the hydraulic actuator.

[0047] The maximum flow rate of the hydraulic actuator is estimated as the preset required flow rate. The calculation formula is as follows: Q=A*v, Where Q is the preset required flow rate in liters per minute (L / min); A is the effective area in square centimeters (cm²); and v is the preset maximum speed of the hydraulic actuator in centimeters per second (cm / s). The preset maximum speed is the known maximum speed of the actuator and is usually provided by the manufacturer or determined according to application requirements.

[0048] Combining the above formulas for calculating effective area and preset demand flow rate, we can obtain the preset demand flow rate Q = (π * D²) * v / 4.

[0049] For example, suppose the actuator piston diameter D = 100mm = 10cm, and the preset maximum speed v = 10cm / s. The effective area of ​​the hydraulic actuator A = (π*10²) / 4 = 78.54cm², and then calculate the preset required flow rate Q = 78.54cm²*10cm / s = 785.4cm³ / s, which is converted to liters / minute: Q = (785.4*60) / 1000 = 47.12L / min. Therefore, the preset required flow rate of the actuator is approximately 47L / min.

[0050] This embodiment calculates the piston area of ​​the hydraulic actuator by obtaining its piston diameter, thereby determining the effective area of ​​the hydraulic actuator. Then, by multiplying the effective area by the preset maximum speed of the hydraulic actuator, the preset required flow rate is determined. This allows for the accurate calculation of the flow rate requirement of the hydraulic actuator at its maximum speed, providing a basis for precise control of the hydraulic pump station and achieving efficient management of the hydraulic system and effective utilization of energy.

[0051] In some embodiments of this application, after controlling the start-stop of the hydraulic pumps in the hydraulic pump station according to the effective flow rate and the load demand flow rate, the hydraulic pump station control method of the intelligent chassis further includes: obtaining the actual opening degree of each servo valve in the open state; determining the actual demand flow rate based on the actual opening degree of each servo valve in the open state; determining the required number of hydraulic pumps according to the actual demand flow rate and the flow rate of a single hydraulic pump in the hydraulic pump station; and adjusting the start-stop of the hydraulic pumps in the hydraulic pump station according to the required number of hydraulic pumps.

[0052] Specifically, the actual opening degree of a servo valve in the open state can be obtained by converting the actual operating voltage of the servo valve, or by obtaining the actual detection value from the opening degree detection sensor; there is no specific limitation. Taking the operating voltage of the servo valve of each hydraulic pump in the open state as an example, the actual opening degree of the corresponding servo valve is identified based on its operating voltage. Then, the actual required flow rate of the hydraulic pump station is determined based on the actual opening degree of the servo valve. For example, the required flow rate corresponding to each servo valve is calculated based on the conversion formula between opening degree and flow rate. Then, the sum of the required flow rates of each servo valve in the open state is calculated to obtain the actual required flow rate of the hydraulic pump station. The actual required flow rate of the hydraulic pump station and the flow rate of a single hydraulic pump in the hydraulic pump station are used to calculate the required number of hydraulic pumps. The start-stop adjustment of the hydraulic pumps in the hydraulic pump station is then performed according to the required number of hydraulic pumps. For example, if the number of currently operating hydraulic pumps in the hydraulic pump station is less than the required number of hydraulic pumps, additional hydraulic pumps are started; if the number of currently operating hydraulic pumps in the hydraulic pump station is more than the required number of hydraulic pumps, the corresponding hydraulic pumps are shut down.

[0053] By accurately monitoring the actual opening degree of the servo valve and dynamically adjusting the number of hydraulic pumps in operation, the system can supply oil on demand, reduce redundant operation of pumps, achieve efficient energy utilization, reduce energy consumption, reduce equipment burden, extend service life, and improve the overall operating efficiency and stability of the hydraulic system.

[0054] In some embodiments, the flow rate of the hydraulic pump station is proportional to the control voltage of the servo valve. The maximum flow rate within the operating range of the hydraulic pump station is denoted as Q. max The maximum operating voltage of the servo valve is taken as W. The proportional coefficient k is calculated as k = Q. max / W. Then the control voltage W of the servo valve. 伺 The calculation method is W 伺 =Q 需 / k, where Q 需 The servo valve is controlled based on the actual flow rate required by the hydraulic pump station.

[0055] In some embodiments of this application, determining the required number of hydraulic pumps based on the actual required flow rate and the flow rate of a single hydraulic pump in the hydraulic pump station includes: obtaining the ratio between the actual required flow rate and the flow rate of a single hydraulic pump to obtain a first value; rounding the first value to obtain a second value; and adding one to the second value to obtain the required number of hydraulic pumps.

[0056] Specifically, the actual required flow rate and the flow rate of a single hydraulic pump are obtained. The PLC then calculates the ratio between these two values ​​to obtain a first value, which represents the theoretically required number of hydraulic pumps. Next, this first value is rounded down to obtain a second value. Finally, the second value is incremented by one to determine redundancy, resulting in the final required number of hydraulic pumps.

[0057] For example, assume the actual required flow rate is 347.12 L / min, and the flow rate of a single hydraulic pump is 100 L / min. The calculated ratio yields a first value of 3.4712. This first value is then rounded down to obtain a second value of 3. Adding one to this second value gives a requirement of 4 hydraulic pumps. Therefore, 4 hydraulic pumps need to be started to meet the actual demand.

[0058] Therefore, by calculating the required number of hydraulic pumps by comparing the actual required flow rate with the flow rate of a single hydraulic pump, the required flow rate of the hydraulic system can be accurately matched, thereby achieving energy saving and consumption reduction. This not only ensures the efficient operation of the hydraulic system, but also reduces energy consumption by minimizing unnecessary hydraulic pump starts, while also reducing equipment wear and tear, effectively extending the service life of hydraulic pumps and motors, and reducing equipment maintenance costs.

[0059] In some embodiments, Lora (Long Range Radio) modules can be used to enhance the IoT functionality of hydraulic pump stations, thus constructing an IoT module for the hydraulic pump station. Lora modules are a low-power wide-area network communication technology characterized by long-range, low-power, and high-capacity communication, suitable for data transmission in industrial environments. This IoT module consists of a transmitter and a receiver. The transmitter is installed at the servo valve to collect the servo valve's control signals and send them to the receiver in the control cabinet. Upon receiving the signal, the receiver transmits the data to the PLC via a network cable for further processing and analysis. Antennas are equipped at both ends of the IoT module to ensure stable signal transmission.

[0060] In some embodiments, a control cabinet can be used to integrate key equipment such as a PLC, contactors, soft starters, and alarms. The PLC, acting as the control center, is responsible for executing preset control programs and automating the management of the entire hydraulic system. Contactors and soft starters control the starting and stopping of the motor, achieving precise control of the hydraulic pump while reducing current surges during startup and extending equipment lifespan. The alarm promptly issues alerts when system abnormalities occur, ensuring safe system operation. The control cabinet also contains necessary components such as circuit breakers, intermediate relays, and contactors. These components work together to ensure the accurate execution of PLC control commands, thereby guaranteeing the stable and efficient operation of the entire hydraulic system. The control cabinet is connected to the pump station motor.

[0061] As a specific embodiment of this application, the intelligent control method for chassis power sources involves the following connected components: flow meters, a human-machine interface (HMI), a PLC, an analog module, a LoRa module, pressure sensors, temperature sensors, differential pressure sensors, water molecule detection sensors, hydraulic pumps, and a control cabinet. The analog module converts the analog signals from the flow meters, pressure sensors, temperature sensors, differential pressure sensors, and water molecule detection sensors into digital signals that the PLC can process and transmits them to the PLC. The flow meters are installed on the sides or below the high-pressure oil pipe and the return oil pipe to avoid gaps inside the oil pipes due to insufficient flow, which could affect the measurement results and ensure that the measurement data accurately reflects the system flow status. The intelligent panel receives data from the PLC and displays the operating status of the hydraulic pump station, including the hydraulic pump's start-up status, running time, operating pressure, operating flow rate, operating temperature, and hydraulic oil contamination level. Figure 2 As shown, the hydraulic pump station control method of this intelligent chassis includes the following steps: S101, High-precision flow meter installation and commissioning: Select suitable locations and install high-precision flow meters on both the high-pressure oil pipe and the return oil pipe. Run the pump station and begin real-time monitoring of the flow data during hydraulic pump station operation. Commission the flow meters to confirm their functionality; if not, reinstall them.

[0062] S102, determine if the flow meter is functioning properly. If yes, proceed to step S104; otherwise, proceed to step S103.

[0063] S103, Reinstall. Return to step S101.

[0064] S104, Input Adaptive Algorithm Flow Calculation Formula: Input the designed adaptive algorithm flow calculation formula into the PLC program via programming software for real-time calculation of dynamically changing flow demands. When load demands change, the algorithm automatically adjusts the start and stop of the hydraulic pump to ensure the system always operates in an optimal state, reducing interference flow and significantly lowering energy consumption.

[0065] S105: Data Acquisition: Converts analog signals from flow meters, pressure sensors, temperature sensors, differential pressure sensors, and water molecule detection sensors into digital signals that can be processed by the PLC via the analog module.

[0066] S106, Data Processing: The ST (Structured Text) language of the programming software is used to process sensor data transmitted from the analog module. Real-time data is displayed on the intelligent control panel (HMI) for easy monitoring by operators.

[0067] S107, Flow Supply: Based on the detected servo valve status, data processing is performed to control the operation and stop of the hydraulic pump, ensuring the flow requirements during equipment operation and dynamically adjusting the operating status of the hydraulic pump.

[0068] S108, Data Storage: The PLC records the running time and temperature of each motor in real time, as well as the operating pressure and flow rate of the hydraulic pump station, and stores the data in the internal memory for subsequent analysis and optimization.

[0069] S109, Remote Monitoring: Through the integration of PLC and HMI, data sharing and remote monitoring are achieved. Real-time data such as motor operating status, flow rate, pressure, and temperature are displayed on the HMI interface for convenient operator monitoring. When the system malfunctions (such as excessive pressure or temperature), the touchscreen automatically displays alarm information and triggers audible and visual alarms, enhancing the system's intelligence level.

[0070] S110, Data IoT: Utilizing IoT technology, system operation data is uploaded to the cloud via the LoRa module, enabling remote monitoring and data analysis. The remote monitoring function facilitates data sharing and historical data analysis, providing support for system optimization. This embodiment can achieve the following beneficial effects: 1. Energy saving and consumption reduction: Through adaptive control algorithms and dynamic start-stop strategies, load demand is accurately matched, significantly reducing energy consumption; 2. Extend equipment life: Optimize motor operation strategy, reduce equipment wear and tear, and extend the service life of hydraulic pumps and motors; 3. Improved operating efficiency: Real-time monitoring and adaptive control enable the system to respond quickly to load changes, thereby improving operating efficiency; 4. Intelligent Management: Through HMI and IoT technologies, data sharing, remote monitoring, and intelligent alarms are achieved, improving the system's management level and security; 5. Reduce maintenance costs: By monitoring the hydraulic oil status and equipment operating parameters in real time, potential problems can be predicted in advance, reducing maintenance costs.

[0071] In summary, this application provides an intelligent, efficient, and energy-saving control method for factory hydraulic pump stations. Through hardware modification, algorithm empowerment, strategy optimization, and IoT integration, it solves the problems of energy waste, high equipment wear and tear, and low control accuracy of traditional hydraulic pump stations, and has significant economic and social benefits.

[0072] This application also provides a computer-readable storage medium storing a control program for a hydraulic pump station, which, when executed by a processor, implements the aforementioned hydraulic pump station control method for an intelligent chassis.

[0073] This application also provides a control device for a hydraulic pump station of an intelligent chassis, as detailed in the following reference. Figure 3 The hydraulic pump station device 200 of the intelligent chassis includes: a first acquisition module 210, a second acquisition module 220, and a control module 230.

[0074] The first acquisition module 210 is used to acquire the output flow and overflow flow of the hydraulic pump station, and determine the effective flow based on the output flow and overflow flow; the second acquisition module 220 is used to acquire the load status of the hydraulic pump station, and determine the load demand flow based on the load status of the hydraulic pump station; the control module 230 is used to control the start and stop of the hydraulic pump in the hydraulic pump station based on the effective flow and the load demand flow.

[0075] In some embodiments of this application, the hydraulic pump station is connected to multiple load devices. The first acquisition module 210 acquires the output flow rate and interference flow rate of the hydraulic pump station. Specifically, it is used to: install and debug flow meters on the high-pressure oil pipe and return oil pipe of the hydraulic pump station respectively; when the flow meter debugging is successful, control the hydraulic pump station to start and control the multiple load devices to shut down, so as to acquire the basic overflow flow rate through the flow meter of the return oil pipe; during the opening process of at least one load device, acquire the output flow rate through the flow meter of the high-pressure oil pipe, and determine the interference flow rate based on the total number of at least one load device opened and the basic overflow flow rate.

[0076] In some embodiments of this application, the first acquisition module 210 determines the interference flow based on the total number of at least one load device in operation and the basic overflow flow. Specifically, it is used to: obtain the product between the total number of devices in operation and a preset coefficient to obtain the first interference flow; and obtain the sum of the basic overflow flow and the first interference flow to obtain the interference flow.

[0077] In some embodiments of this application, the load device is a hydraulic actuator using a servo valve. The load state of the hydraulic pump station is the working state of the servo valve of each hydraulic actuator. The second acquisition module 220 is used to determine the load demand flow rate based on the load state of the hydraulic pump station. Specifically, it is used to: acquire the working voltage of the servo valve of each hydraulic actuator; identify the working state of the servo valve of the corresponding hydraulic actuator based on the working voltage of the servo valve of each hydraulic actuator; determine the total number of servo valves in the open state based on the working state of the servo valve of each hydraulic actuator; determine the preset demand flow rate of the hydraulic actuator; and acquire the product of the total number of servo valves and the preset demand flow rate to obtain the load demand flow rate.

[0078] In some embodiments of this application, the second acquisition module 220 determines the preset required flow rate of the hydraulic actuator, specifically for: calculating the piston area of ​​the hydraulic actuator based on the piston diameter of the hydraulic actuator to determine the effective area of ​​the hydraulic actuator; and obtaining the product between the effective area and the preset maximum speed of the hydraulic actuator to determine the preset required flow rate.

[0079] In some embodiments of this application, after the control module 230 controls the start-stop of the hydraulic pumps in the hydraulic pump station based on the effective flow rate and the load demand flow rate, it is further configured to: obtain the actual opening degree of each servo valve in the open state; determine the actual demand flow rate based on the actual opening degree of each servo valve in the open state; determine the required number of hydraulic pumps based on the actual demand flow rate and the flow rate of a single hydraulic pump in the hydraulic pump station; and adjust the start-stop of the hydraulic pumps in the hydraulic pump station based on the required number of hydraulic pumps.

[0080] In some embodiments of this application, the control module 230 determines the required number of hydraulic pumps based on the actual required flow rate and the flow rate of a single hydraulic pump in the hydraulic pump station. Specifically, it is used to: obtain the ratio between the actual required flow rate and the flow rate of a single hydraulic pump to obtain a first value; round the first value to obtain a second value; and add one to the second value to obtain the required number of hydraulic pumps.

[0081] This application also provides an electronic device, with reference to... Figure 4 The electronic device 300 includes a memory 310, a processor 320, and a control program for a hydraulic pump station stored in the memory 310 and executable on the processor 320. When the processor 320 executes the control program for the hydraulic pump station, it implements the aforementioned hydraulic pump station control method for the intelligent chassis.

[0082] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0086] Any process or method described in the flowchart or otherwise herein is to be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0087] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0088] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0089] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments.

[0090] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0091] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

[0092] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0093] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A hydraulic pump station control method for an intelligent chassis, characterized in that, The method includes: The output flow rate and interference flow rate of the hydraulic pump station are obtained, and the effective flow rate is determined based on the output flow rate and the interference flow rate. Obtain the load status of the hydraulic pump station, and determine the load demand flow rate based on the load status of the hydraulic pump station; The hydraulic pumps in the hydraulic pump station are started and stopped according to the effective flow rate and the load demand flow rate.

2. The hydraulic pump station control method for an intelligent chassis according to claim 1, characterized in that, The hydraulic pump station is connected to multiple load devices, and the output flow and interference flow of the hydraulic pump station are obtained, including: Flow meters were installed and tested on the high-pressure oil pipe and return oil pipe of the hydraulic pump station. Once the flow meter has been successfully tested, the hydraulic pump station is started and multiple load devices are shut down to obtain the basic overflow flow rate through the flow meter on the return oil pipe. During the activation of at least one of the load devices, the output flow rate is obtained through the flow meter of the high-pressure oil pipe, and the interference flow rate is determined based on the total number of activated load devices and the basic overflow flow rate.

3. The hydraulic pump station control method for an intelligent chassis according to claim 2, characterized in that, Determining the interference flow based on the total number of at least one of the load devices in operation and the basic overflow flow includes: The first interference flow is obtained by multiplying the total number of activations by a preset coefficient. The sum of the basic overflow flow and the first interference flow is obtained to obtain the interference flow.

4. The hydraulic pump station control method for an intelligent chassis according to claim 2, characterized in that, The load device is a hydraulic actuator using a servo valve. The load status of the hydraulic pump station is the operating status of the servo valve of each hydraulic actuator. The load demand flow rate is determined based on the load status of the hydraulic pump station, including: Obtain the operating voltage of the servo valve of each hydraulic actuator, and identify the operating state of the servo valve of the corresponding hydraulic actuator based on the operating voltage of the servo valve of each hydraulic actuator; The total number of servo valves in the open state is determined based on the operating state of the servo valve of each hydraulic actuator. The preset required flow rate of the hydraulic actuator is determined, and the product of the total number of servo valves and the preset required flow rate is obtained to obtain the load required flow rate.

5. The hydraulic pump station control method for an intelligent chassis according to claim 4, characterized in that, Determining the preset flow rate requirement of the hydraulic actuator includes: The piston area of ​​the hydraulic actuator is calculated based on the piston diameter of the hydraulic actuator to determine the effective area of ​​the hydraulic actuator; The product between the effective area and the preset maximum speed of the hydraulic actuator is obtained to determine the preset required flow rate.

6. The hydraulic pump station control method for an intelligent chassis according to claim 4, characterized in that, After controlling the start-stop of the hydraulic pumps in the hydraulic pump station based on the effective flow rate and the load demand flow rate, the method further includes: Obtain the actual opening degree of each of the servo valves that is in the open state; The actual required flow rate is determined based on the actual opening degree of each of the aforementioned servo valves that is in the open state; The required number of hydraulic pumps is determined based on the actual required flow rate and the flow rate of a single hydraulic pump in the hydraulic pump station. Adjust the start and stop of the hydraulic pumps in the hydraulic pump station according to the required number of hydraulic pumps.

7. The hydraulic pump station control method for an intelligent chassis according to claim 6, characterized in that, The required number of hydraulic pumps is determined based on the actual required flow rate and the flow rate of a single hydraulic pump in the hydraulic pump station, including: Obtain the ratio between the actual required flow rate and the flow rate of the single hydraulic pump to obtain a first value; The first value is rounded down to obtain the second value; Add one to the second value to obtain the required number of hydraulic pumps.

8. A computer-readable storage medium, characterized in that, It stores a control program for a hydraulic pump station, which, when executed by a processor, implements the hydraulic pump station control method for an intelligent chassis according to any one of claims 1-7.

9. A hydraulic pump station control device for an intelligent chassis, characterized in that, The device includes: The first acquisition module is used to acquire the output flow rate and overflow flow rate of the hydraulic pump station, and determine the effective flow rate based on the output flow rate and the overflow flow rate; The second acquisition module is used to acquire the load status of the hydraulic pump station and determine the load demand flow rate based on the load status of the hydraulic pump station. The control module is used to control the start and stop of the hydraulic pumps in the hydraulic pump station according to the effective flow rate and the load demand flow rate.

10. An electronic device, characterized in that, The system includes a memory, a processor, and a control program for a hydraulic pump station stored in the memory and executable on the processor. When the processor executes the control program for the hydraulic pump station, it implements the hydraulic pump station control method for the intelligent chassis according to any one of claims 1-7.

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