A high-precision and low-ripple integrated control system for series pumps

Abstract

The present invention discloses a high-precision and low-pulsation integrated control system for series pumps. The system includes a master control logic unit, a drive control module, a sensing gain feedback module, and a peripheral integration module. The master control unit is responsible for controlling the rhythm, logic, and peripheral integration of the entire series chromatography pump. The drive control module is used to drive the coordinated movement of the multi-axis motor end. The sensing gain feedback module is used to detect, record, and feedback the status of specific parameters of the system. The peripheral integration module realizes the specific functional requirements of the liquid chromatography series pump and conducts two-way data and control instruction transmission between the master control unit, the drive control module, and the sensing gain feedback module.

Description

Technical Field

[0001] This application relates to the technical field of electronic engineering, in particular to a high-precision and low-pulsation series pump integrated control system. Background Art

[0002] Currently, the ultra-high performance liquid chromatography analyzer (UHPLC) is the most advanced detection system in the existing chromatography analysis field, and it is an inevitable trend for the replacement of the widely used high performance liquid chromatography analysis system (HPLC). In the fields of food safety, pharmaceuticals, environmental detection, scientific research, etc., it greatly improves the work efficiency of chromatographers, significantly reduces the consumption of solvents and samples, greatly reduces the demand for environmental resources, and significantly saves costs.

[0003] Currently, the vast majority of UHPLC systems are products of foreign companies, and there is no domestic UHPLC benchmark product. The main reason is that the core component of UHPLC - the high-precision and low-pulsation series pump lacks corresponding matching suppliers and a complete supply chain solution, and there is a large gap in this product technology compared with foreign countries. It is difficult to meet the performance requirements in terms of flow accuracy, flow pulsation, high-pressure resistance, efficient analysis, etc., which restricts the development of domestic UHPLC. Summary of the Invention

[0004] This application overcomes the deficiencies of the existing control system with poor multi-axis control synchronization and poor hardware system integration, and provides a high-precision and low-pulsation series pump integrated control system. Through integrated design, the control accuracy of the existing series pump drive system is improved. This method is used to ensure the consistency of the conveying flow accuracy of the series pump under different working conditions and medium conditions, reduce the system pressure pulsation during operation, and ensure high-precision, low-pulsation, and dynamic response of the output flow.

[0005] In the first aspect, a liquid chromatography pump control system is provided. The liquid chromatography pump control system is applied to a liquid chromatography pump system. The liquid chromatography pump system includes a main pump element, a secondary pump element, a main pump element motor, and a secondary pump element motor. The main pump element and the secondary pump element are used to exchange liquids with a flow path tube connected between an inlet and an outlet. The main pump element motor is used to control the main pump element to discharge or extract liquids, and the secondary pump element motor is used to control the secondary pump element to discharge or extract liquids;

[0006] The liquid chromatography pump control system includes a total control logic module, a drive control module, and a sensing gain feedback module. The total control logic module is used to determine the drive control instruction for the i-th cycle according to the state parameter information obtained from the sensing gain feedback module in the (i - 1)-th cycle. The drive control module is used to control the main pump element motor and the secondary pump element motor in the (i + 1)-th cycle according to the drive control instruction for the i-th cycle.

[0007] In combination with the first aspect, in some implementations of the first aspect, the liquid chromatography pump control system includes a plurality of registers, the drive control module includes a plurality of drivers, the plurality of registers are connected in parallel to the plurality of drivers, and the drivers are configured to read drive control instructions from the corresponding registers under the trigger of the master control logic module.

[0008] In combination with the first aspect, in some implementations of the first aspect, determining the drive control instruction for the i-th cycle includes:

[0009] In the first time period of the i-th cycle, write the drive control instructions for the corresponding drivers into the plurality of registers respectively;

[0010] In the second time period of the i-th cycle, trigger the plurality of drivers to read the drive control instructions from the corresponding registers respectively.

[0011] In combination with the first aspect, in some implementations of the first aspect, the drive control instructions written in the first time period of the i-th cycle are calculated in the second time period of the (i - 1)-th cycle.

[0012] In combination with the first aspect, in some implementations of the first aspect, the second time period is less than the first time period.

[0013] In combination with the first aspect, in some implementations of the first aspect, the liquid chromatography pump control system is used to perform speed regulation, and the speed regulation satisfies:

[0014] ,

[0015] where is the speed set value after compensation in the i-th cycle, is the set speed set value, is the actual arrival position value in the (i - 1)-th cycle, is the set arrival position value in the (i - 1)-th cycle, is the duration of the (i - 1)-th cycle, is a coefficient.

[0016] In combination with the first aspect, in some implementations of the first aspect, the liquid chromatography pump control system is further used to balance the pressures of the main pump element and the auxiliary pump element, satisfying:

[0017] , ΔL is the change value of the stroke in the cavity, is the compensation coefficient of the liquid, V is the volume of the main pump element or the auxiliary pump element, and the volumes of the main pump element and the auxiliary pump element are the same, , P1 is the measurement value of the main pump pressure sensor, P2 is the measurement value of the auxiliary pump pressure sensor, and R is the radius of the flow path tube.

[0018] In combination with the first aspect, in certain implementations of the first aspect, the overall control logic unit includes a logic control sub-module and a high-speed data parsing sub-module. The logic control sub-module is used to generate the drive control instruction, and the high-speed data parsing sub-module is used to perform real-time arithmetic parsing on the status parameter information.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the drive control module includes a multi-axis motor drive sub-module and a motion trajectory phase correction sub-module. The multi-axis motor drive sub-module is used to receive the coordinated motion signal of the overall control logic unit and convert it into respective drive signals for each multi-axis motor to execute the motor operation action. The motion trajectory phase correction sub-module can be used to adaptively adjust and reduce the real-time operation error of each current axis motor, and to real-time adjust and eliminate the phase accumulation error of multi-axis operation.

[0020] In a second aspect, a liquid chromatography pump system is provided, which includes a main pump element, a secondary pump element, a main pump element motor, a secondary pump element motor, and the liquid chromatography pump control system as described in any one of the implementations in the above first aspect. The main pump element and the secondary pump element are used to exchange liquid with a flow path tube connected between an inlet and an outlet. The liquid chromatography pump control system is used to control the main pump element and the secondary pump element to exchange liquid with the flow path tube respectively through the main pump element motor and the secondary pump element motor.

[0021] Compared with the prior art, the solution provided by this application includes at least the following beneficial technical effects:

[0022] (1) Adopt a more optimized control system composition architecture. Adopt a system architecture of high-precision motors and encoders + high-speed pressure sensor data acquisition unit + high-speed field bus and upper computer. And to meet the overall requirements of light weight and small size, adopt an overall control architecture of ARM + DSP to generate stable motion beats and drive instructions. The high-speed pressure sensor data acquisition unit performs data acquisition and control instruction communication through a high-speed peripheral interface, which can effectively reduce the number of signal lines and there is no loss of measurement accuracy in signal transmission; the high-precision motors perform instruction communication through a grouped high-speed CAN bus on the external design interface, ensuring independent sending and receiving of instructions without mutual conflict and interference, effectively reducing communication signal interference, instruction delay and out-of-sync problems caused by too many nodes in the bus control loop, and being more adaptable to the trend of distributed and modular design of the control system.

[0023] (2) Adopt a real-time online compensation control strategy and algorithm. The present invention designs a motion trajectory phase correction module. Through real-time acquisition of pressure data and data compensation methods, the motors driven by the two pump elements can perform real-time online adjustment according to the motion results of the previous cycle in each coordinated motion cycle, realizing online identification and dynamic compensation of the compression amount, and greatly reducing the system pressure pulsation. Description of the Drawings

[0024] Figure 1 It represents the block diagram of the series pumps where the integrated control system provided by the embodiments of the present invention is located;

[0025] Figure 2 It represents the block diagram of the integrated control system provided by the embodiments of the present invention;

[0026] Figure 3 It represents the process diagram of multi-axis motor synchronous control and adaptive regulation provided by the embodiments of the present invention;

[0027] Figure 4 It represents the process diagram of the alternating operation and pressure compensation of the main and auxiliary pump elements provided by the embodiments of the present invention. Detailed implementation manners

[0028] The following further describes the present application in detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 It is a schematic structural diagram of the integrated control system and series pumps provided by the present invention. The motion planning of the motor 2 for driving the main pump element and the motor 5 for driving the auxiliary pump element is controlled by the integrated control system 1. The integrated control system 1 is used to control the motors to make the main pump element 3 and the auxiliary pump element 6 perform complementary action alternation, so that the liquid flow rate flowing in from the inlet and the liquid flow rate discharged from the outlet are consistent with the preset target flow rate.

[0030] The complementary actions of the main pump element 3 and the auxiliary pump element 6 are described in detail, which are mainly divided into two stages: In the first stage, during the discharge stroke of the main pump element 3 for discharging liquid, the auxiliary pump element 6 performs the suction stroke for sucking liquid. A part of the liquid discharged from the main pump element 3 is sucked into the pump cavity of the auxiliary pump element 6. If the suction speed of the auxiliary pump element 6 is less than the discharge speed of the main pump element 3, the remaining liquid will flow out from the outlet. In the second stage, during the discharge stroke of the auxiliary pump element 6 for discharging liquid, the main pump element 3 performs the compression action of the liquid in the cavity to ensure that the liquid pressure in the main pump element 3 is close to or equal to the liquid pressure in the cavity of the auxiliary pump element 6. Since the main pump element 3 and the auxiliary pump element 6 are connected by a check valve, the liquid in the auxiliary pump element 6 will only flow out from the outlet end during the liquid discharge process. The above two stages are cyclically and alternately executed to form a flow output under a stable pressure.

[0031] Figure 2 It is a high-precision and low-pulsation series pump integrated control system provided by the present invention. The integrated control system may include a master control logic module, a drive control module, a sensing gain feedback module, and a peripheral integration interface module.

[0032] The master control logic module is the core and smallest unit of the entire series pump control. It forms a physical connection with the drive control module and the sensing gain feedback module through the peripheral integration interface module, and can logically transmit information bidirectionally with the drive control module and the sensing gain feedback module. The drive control module is used to receive and feedback the information of the master control logic module and synchronously drive multiple motors to move collaboratively. The sensing gain feedback module interacts with the master control logic module in real time, and is used to detect, record, and feedback the status of specific parameters of the system in real time. The peripheral integration interface module is the physical and logical channel for the master control logic module to interact with the drive control module and the sensing gain feedback module, and realizes the unified integrated management of the series pump peripheral interfaces.

[0033] In some embodiments, the master control logic unit may include a logic control sub-module and a high-speed data parsing sub-module. The logic control sub-module is used to generate control signals and data interactions with the peripheral electronic control devices of the series pump; the high-speed data parsing sub-module is used to perform real-time arithmetic parsing on the parameter data required during the operation of the series pump. The above sub-modules can physically be set in a main electronic chip.

[0034] In some embodiments, the peripheral integration interface module may be a unified interface for the master control logic unit to interact with the peripherals of the series pump, and perform unified data and control logic management on the drive control module and the sensing gain feedback module. In terms of physical form, it can be the peripheral circuit and components of the main electronic chip.

[0035] In some embodiments, the drive control module may include a multi-axis motor drive sub-module and a motion trajectory phase correction sub-module. The multi-axis motor drive sub-module can be used to receive the collaborative motion signal of the master control unit and convert it into the respective drive signals of the multi-axis motors to execute the motor operation actions. The motion trajectory phase correction sub-module can be used to adaptively adjust and reduce the current real-time operation error of each axis motor, and real-time adjust and eliminate the accumulated phase error of multi-axis operation. The above sub-modules can be integrated on an independent circuit board.

[0036] In some embodiments, the sensing gain feedback module can be used to monitor and feedback the current key state parameter values of the system in real time, and is directly connected to the master control logic unit through a physical wiring method, providing data feedback for the master control unit to adjust the operation state. This module can be integrated on an independent circuit board.

[0037] The present invention also provides a high-precision and low-pulsation series pump integrated control method, and the specific steps are as follows.

[0038] 1) Precise synchronization of multi-axis control instructions of the master control logic unit

[0039] Precise clock signal timing triggering is performed through the high-speed data parsing sub-module in the master control logic unit. By modifying the data in the calibration value register, the CPU frequency is modified to achieve triggering at a specific interrupt time interval.

[0040] When the master control logic module provided by the present invention executes instruction sending, it adopts the CANOpen-PDO synchronous mapping control method. Before updating the execution action during the operation of the motor, all motor trajectory planning parameters are written in advance, and multiple motor action execution instructions are sent within the timing interrupt function triggered by the same time beat.

[0041] Multiple CANs are connected in parallel to multiple single-axis drivers. Each axis driver is set with a unique ID number. Each axis driver listens for instructions in real time and executes the instructions with its own ID number. As Figure 3 shown, within the T(1) cycle, the acceleration A, speed V, and position P of the driving motors of the main pump element and the auxiliary pump element are alternately sent at intervals in sequence, written into the CAN-PDO mapping. At the end time node of T(1), the motor drive instructions of the two pump elements are updated simultaneously, and then the two motors operate synchronously according to the set operation curve.

[0042] As Figure 3 shown, the i-th cycle can be divided into 2 time periods. The first time period can be used to write A i (1), A i (2), V i (1), V i (2), P i (1), P i (2) (which can be determined according to the state parameter value obtained from the sensing gain feedback module in the (i - 1)-th cycle). A i (1), A i (2), V i (1), V i (2), P i (1), P i (2) can be used to indicate the parameters of the motor driven by the driver in the (i + 1)-th cycle.

[0043] As Figure 3 shown, A i (1) can be written into CAN(1) in time period 1 of the first time period. A i (1) can be used to indicate the acceleration of the main pump element motor. A i (2) can be written into CAN(2) in time period 2 of the first time period. A i (2) can be used to indicate the acceleration of the auxiliary pump element motor. V i (1) can be written into CAN(1) in time period 3 of the first time period. V i(1) It can be used to indicate the speed of the main pump unit motor. V i (2) It can be written to CAN(2) in period 4 of the first period, V i (2) It can be used to indicate the speed of the auxiliary pump unit motor. P i (1) It can be written to CAN(1) in period 5 of the first period, P i (1) It can be used to indicate the position of the main pump unit motor. P i (2) It can be written to CAN(2) in period 6 of the first period, P i (2) It can be used to indicate the position of the auxiliary pump unit motor.

[0044] The second period can be used to send commands R i (1), R i (2), to simultaneously trigger the main pump unit driver and the auxiliary pump unit driver to read the parameters in the register; the second period can also be used to calculate the A i+1 (1), A i+1 (2), V i+1 (1), V i+1 (2), P i+1 (1), P i+1 (2) that should be stored in the register in the next cycle (i.e., the (i + 1)-th cycle). Specifically, the master control logic unit can determine the deceleration A, speed V, and position P of the (i + 1)-th cycle according to the state parameter values obtained from the sensing gain feedback module during the i-th cycle. The duration occupied by the second period can be much less than the duration occupied by the first period.

[0045] 2) Precise position control and trajectory planning of the drive control module

[0046] The execution instructions received by the drive control module include the arrival position value instruction, the running speed instruction, and the motion acceleration and deceleration instruction. The motor selects the position control mode. The drive control module adaptively generates a motor running position - speed - time curve according to the above received instruction set and drives the motor to move according to the specified curve. Different from the existing scheme that only sets the instructions once at the beginning of the operation, in this method, during the operation, the motion trajectory phase correction sub-module continuously compares the difference between the arrival position value and the feedback value of the high-precision encoder directly connected to the motor tail end. By calculating the magnitude and sign of the difference, it updates the position - speed - time curve and generates the updated curve points. Using the position instruction value as the outermost closed loop of the motor control, it adjusts the running speed of the motor at all times until the arrival position value is the same as the encoder feedback value, thereby realizing the real-time and precise execution of the motor position - speed - time curve.

[0047] The motion trajectory phase correction sub-module in the drive control module provided by the present invention ensures that, under the condition of maintaining the current running speed, according to the feedback results of the motor encoder position information of each pump element, the speed can be adjusted in real time. By updating the position-speed-time curve through the magnitude and sign of the difference, it is ensured that the motor can perform real-time speed adjustment within the T(1)-T(n) cycle. By controlling the time interval of each cycle T, speed adjustment can be achieved.

[0048]

[0049] where is the speed set value after compensation in the i-th cycle (which can be stored in a register in the i-th cycle to indicate the driving mode of the driver in the (i + 1)-th cycle), is the set speed set value. is the actual arrival position value in the (i - 1)-th cycle, is the set arrival position value in the (i - 1)-th cycle. is the duration of the (i - 1)-th cycle. In some embodiments, by adjusting the cycle length of T, the magnitude of the actual given speed can be adjusted in real time, thereby dynamically adjusting and updating the correspondence relationship between the motor position, speed, and time. is a coefficient, which can take a value of 1. can be approximately solved through

[0050] The sensing gain feedback module logic closed-loop reduces system pulsation. The sensing gain feedback module, as the acquisition unit of the system pressure value, participates in the low pulsation control process of the system pressure. The main control logic unit receives the acquired sensing gain data and performs periodic parameter compensation and update. During the commutation process of the main and auxiliary cylinder motors running alternately, in order to ensure that the pressure fluctuation is maintained within a certain range, it is necessary to obtain the measurement difference of the main and auxiliary pump pressure sensors in the current cycle, and through the system piecewise linear interpolation calculation, obtain the running trajectory planning of the main and auxiliary cylinder motors required to maintain balance in the next synchronous cycle, realizing online identification and dynamic compensation of the arrival position quantity. In each operating cycle, the sensing gain feedback module calibrates the parameters of the two pressure sensors of the main and auxiliary pumps with respect to the pressure balance state and the normal pressure state as the reference. Therefore, the correction value will also change with the change of the system, reducing the requirements for the accuracy and consistency of the sensing gain feedback module itself.

[0051] ​Under actual working conditions, during the operation of the series pump, since the set flow rate gradually increases linearly with time, the driving motor speeds of the main pump element and the auxiliary pump element change linearly, causing the system pressure in the cavity to change. To ensure the smoothness of the gradient curve and the accuracy of the flow rate, it is necessary for the driving motors of the main pump element and the auxiliary pump element to change the motion parameters in each cycle. At the same time, to ensure the accuracy and low pulsation of the flow rate throughout the process, the multi-axis motion needs to maintain a certain coupling and coordination, and the compression coefficient needs to be dynamically adjusted. Therefore, the information flow of the entire control system must be transmitted quickly and accurately to ensure that the concentration ratio in the gradient process is accurately and stably operated according to the set method.

[0052] Figure 4 The curves of the main pump element motor and the auxiliary pump element motor are shown. Combining Figure 4 and Figure 1 , during the process from a to b, the main pump element motor decelerates, and the main pump element has discharged most of the liquid; the auxiliary pump element motor accelerates, and there is still relatively more liquid in the auxiliary pump element that has not been discharged. During the process from b to c, the main pump element motor pauses to prepare for the upcoming reverse rotation; the auxiliary pump element continues to discharge the liquid. During the process from c to f, the main pump element starts to extract part of the liquid flowing in from the inlet, and the remaining liquid flowing in from the inlet and the liquid discharged from the auxiliary pump element flow to the outlet together. During this period, the main pump element motor can experience one acceleration and one deceleration. The liquid stored in the main pump element gradually increases, and the liquid stored in the auxiliary pump element gradually decreases. During the process from f to g, since the liquid stored in the auxiliary pump element is relatively less, the formed hydraulic pressure is relatively small, and the main pump element can reverse the driving motor to compress the liquid in the main pump element, increasing the liquid pressure to prepare for the subsequent discharge of the liquid by the main pump element. At the same time, the auxiliary pump element continues to discharge the liquid. During the process from h to i, since the liquid pressure in the main pump element is relatively increased, to reduce the loss of the driving motor, the main pump pressure motor pauses to prepare for the subsequent reverse rotation. During the process from i to n, the main pump element continuously discharges the liquid, and the auxiliary pump element changes from discharging a small amount of liquid to extracting the liquid. Part of the liquid discharged from the inlet and the main pump element can enter the auxiliary pump element, and the other part can be discharged through the outlet.

[0053] During the double-cylinder commutation stage (i.e., the process from f to g), there will be pressure pulsation due to the different pressures in the two cylinders after the valve is opened. The pressure error value in the cavities of the main pump element and the auxiliary pump element , where P2 is the measured value of the auxiliary pump pressure sensor and P1 is the measured value of the main pump pressure sensor. Based on the pressure change value of the pressure sensor at the start and end of the current operation cycle , the position quantity ΔL that the driving motor of the main pump element needs to reach in the next cycle is calculated by piecewise linear interpolation to ensure the generation of pre-pressure, so that there will be no pressure difference at the moment of commutation. Subsequently, the above calculation parameters are updated and calculated in the total control logic module to generate the ΔL value required for the next cycle, realizing online identification and dynamic compensation of the arrival position quantity.

[0054] The specific process of calculating the motor arrival position quantity ΔL of the system in the next cycle is as follows:

[0055] (1) Calculate the volume to be compressed in the current state :

[0056]

[0057] The compensation coefficient of the liquid Based on the laboratory test results under conventional conditions, it can be obtained by looking up the table. V is the volume of the main pump element or the auxiliary pump element (the volumes of the main pump element and the auxiliary pump element are the same).

[0058] (2) Calculate the distance ΔL (i.e., the change value of the stroke in the cavity) that the plunger needs to move to compress a certain volume of the liquid:

[0059] , where R is the radius of the flow path pipe.

[0060] (3) According to (1) and (2), ΔL can be calculated, and ΔL can correspond to the motor arrival position quantity of the system in the next cycle:

[0061] .

[0062] Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope defined by the claims of the present invention.

Claims

1. A liquid chromatography pump control system, characterized in that, The liquid chromatography pump control system is applied to a liquid chromatography pump system, which includes a main pump element, a secondary pump element, a main pump element motor, and a secondary pump element motor. The main pump element and the secondary pump element are used to exchange liquids with a flow path tube connected between an inlet and an outlet. The main pump element motor is used to control the main pump element to discharge or extract liquids, and the secondary pump element motor is used to control the secondary pump element to discharge or extract liquids; The liquid chromatography pump control system includes a master control logic module, a drive control module, and a sensing gain feedback module. The master control logic module is used to determine the drive control instruction for the i-th cycle based on the status parameter information obtained from the sensing gain feedback module in the (i - 1)-th cycle. The drive control module is used to control the main pump element motor and the secondary pump element motor in the (i + 1)-th cycle according to the drive control instruction for the i-th cycle; The liquid chromatography pump control system includes a plurality of registers, and the drive control module includes a plurality of drivers. The plurality of registers are connected in parallel to the plurality of drivers, and the drivers are used to read the drive control instructions from the corresponding registers under the trigger of the master control logic module; Determining the drive control instruction for the i-th cycle includes: in the first period of the i-th cycle, writing the drive control instructions for the corresponding drivers into the plurality of registers respectively; in the second period of the i-th cycle, triggering the plurality of drivers to read the drive control instructions from the corresponding registers respectively. The drive control instructions written in the first period of the i-th cycle are calculated in the second period of the (i - 1)-th cycle, and the second period is less than the first period; The driving motors of the main pump element and the auxiliary pump element change the motion parameters within each cycle; during the double-cylinder commutation stage, the pressure error value in the cavities of the main pump element and the auxiliary pump element , where P2 is the measured value of the auxiliary pump pressure sensor and P1 is the measured value of the main pump pressure sensor; based on the pressure change value of the pressure sensor at the start and end of the current operation cycle , the position quantity ΔL reached by the driving motor of the main pump element in the next cycle is calculated by piecewise linear interpolation to ensure the generation of pre-pressure to achieve online identification and dynamic compensation of the reached position quantity; the liquid chromatography pump control system is also used to balance the pressures of the main pump element and the auxiliary pump element, satisfying: , ΔL is the stroke change value in the cavity, is the compensation coefficient of the liquid, V is the volume of the main pump element or the auxiliary pump element, and the volumes of the main pump element and the auxiliary pump element are the same. , P1 is the measured value of the main pump pressure sensor, P2 is the measured value of the auxiliary pump pressure sensor, and R is the radius of the flow path pipe.

2. The liquid chromatography pump control system according to claim 1, wherein, The liquid chromatography pump control system is used to perform speed regulation, and the speed regulation satisfies: ， wherein is the compensated speed set value in the i-th cycle, is the set speed set value, is the actual arrival position value in the (i - 1)-th cycle, is the set arrival position value in the (i - 1)-th cycle, is the duration of the (i - 1)-th cycle, is a coefficient.

3. The liquid chromatography pump control system according to claim 1, wherein, The master control logic unit includes a logic control sub-module and a high-speed data analysis sub-module. The logic control sub-module is used to generate the drive control instruction, and the high-speed data analysis sub-module is used to perform real-time arithmetic analysis on the status parameter information.

4. The liquid chromatography pump control system according to claim 1, characterized in that, The drive control module includes a multi-axis motor drive sub-module and a motion trajectory phase correction sub-module. The multi-axis motor drive sub-module is used to receive the coordinated motion signal of the master control logic unit and convert it into the respective drive signals of the multi-axis motors to execute the motor operation actions. The motion trajectory phase correction sub-module can be used to adaptively adjust and reduce the current real-time operation error of each axis motor, and adjust in real time to eliminate the phase accumulation error of multi-axis operation.

5. A liquid chromatography pump system, characterized in that, Comprising a main pump element, a secondary pump element, a main pump element motor, a secondary pump element motor, and the liquid chromatography pump control system according to any one of claims 1 to 4, wherein the main pump element and the secondary pump element are used to exchange liquids with a flow path tube connected between an inlet and an outlet, and the liquid chromatography pump control system is used to control the main pump element and the secondary pump element to exchange liquids with the flow path tube respectively through the main pump element motor and the secondary pump element motor.

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