A peristaltic pump precise quantitative control system and control method thereof

Abstract

The present invention relates to a peristaltic pump precise quantitative control system and a control method thereof. The system includes a driver, a pump head, a pipeline switching device, a metering pipeline, and a discharge pipeline. The pump head is provided with an elastic hose, and the outlet end of the elastic hose is connected to the pipeline switching device. The driver drives the pump head to operate, pumping liquid in the pipeline to the outlet end of the elastic hose. The driver is electrically connected to the pipeline switching device and can control the pipeline switching device to switch the outlet end of the elastic hose to connect to the metering pipeline or the discharge pipeline. In response to the driver driving the pump head to operate to a predetermined starting position, the pipeline switching device is driven to switch the outlet end of the elastic hose from being connected to the discharge pipeline to being connected to the metering pipeline. The embodiments of the present invention achieve precise quantitative delivery of the peristaltic pump, and have the advantages of simple structure, high quantitative accuracy, continuous operation, high delivery efficiency, low cost, and wide adaptability.

Description

Technical Field

[0001] The present invention belongs to the technical field of peristaltic pumps, and in particular relates to a precise quantitative control system for peristaltic pumps and a control method thereof. Background Art

[0002] A peristaltic pump generally comprises a driver (not shown), a pump head 101 and an elastic hose 102. Figure 1 As shown in the figure, when a peristaltic pump is in operation, the elastic hose 102 is filled with liquid 103. A driver, via a shaft 108, drives the roller 104 in the pump head 101 to rotate. During this rotation, multiple rollers 105 on the periphery of roller 104 alternately squeeze and release the elastic hose 102 toward the hose pressure block 106, thereby creating a negative pressure within the elastic hose 102 and pumping the liquid 103. Compared with other pumps, peristaltic pumps offer advantages such as good controllability, pollution-free operation, cleanliness, and a certain degree of transmission accuracy. They are currently widely used in various fields such as biology, environmental protection, chemical engineering, pharmaceuticals, laboratories, and intelligent manufacturing, and have huge market prospects.

[0003] Liquid quantitative filling is a major application of peristaltic pumps. The existing peristaltic pump quantitative dispensing function controls the motor to rotate the same number of revolutions to obtain a roughly uniform amount of dispensed liquid.

[0004] However, peristaltic pumps experience pulsation during operation. When the hose extrusion component (generally referred to as a roller or rotor in the peristaltic pump field, depending on its characteristics) leaves the working surface at the outlet, it will suddenly and instantly release the occupied volume, causing the liquid flow at the outlet to decrease instantly. In addition, the larger the inner diameter of the hose, the larger the volume occupied by a hose extrusion component on the hose, and the more obvious the flow pulsation phenomenon generated at the outlet. Since the position of the hose extrusion point is not fixed each time the peristaltic pump is started according to the task and the pulsation phenomenon exists, under fixed speed conditions, the amount of liquid transmitted within the same time interval has a deviation in the volume occupied by a hose extrusion component on the hose. Therefore, the larger the inner diameter of the hose, the greater the error in liquid distribution.

[0005] To ensure the accuracy of peristaltic pump dosing, conventional practice is to use a hose with a smaller inner diameter. However, this approach presents a problem: to transfer the same amount of liquid, a smaller hose requires more revolutions. This not only prolongs filling time and reduces efficiency, but also increases the frequency of hose squeezing, significantly shortening its service life and reducing the stability of the peristaltic pump's dosing.

[0006] Current linear peristaltic pumps on the market address these issues by converting rotary motion into a repetitive, single-stroke linear motion with adjustable stroke, enabling precise metered liquid dispensing. However, these pumps are complex and expensive, lack continuous operation, have long return stroke times, and lack versatility. Summary of the Invention

[0007] In order to solve the above-mentioned technical problem of large quantitative error caused by the non-fixed position of the hose extrusion point and pulsation phenomenon when the peristaltic pump is started according to a task each time, an embodiment of the present invention proposes a peristaltic pump precise quantitative control system and a control method thereof.

[0008] According to one aspect of the present invention, a peristaltic pump precise quantitative control system is provided, comprising a driver, a pump head, a pipeline switching device, a metering pipeline and a discharge pipeline.

[0009] The pump head is provided with an elastic hose, and the outlet end of the elastic hose is connected to the pipeline switching device;

[0010] The pipeline switching device can switch the outlet end of the elastic hose to be connected to the metering pipeline or the discharge pipeline;

[0011] The driver drives the pump head to operate, pumping the liquid in the pipeline to the outlet end of the elastic hose; the driver is electrically connected to the pipeline switching device, and can control the pipeline switching device to switch the output pipeline connected to the outlet end of the elastic hose;

[0012] In response to the driver driving the pump head to move to a predetermined starting position, the driving pipeline switching device switches the outlet end of the elastic hose from a state of being connected to the discharge pipeline to a state of being connected to the metering pipeline.

[0013] Furthermore, the peristaltic pump precise quantitative control system also includes an input pipeline connected to the inlet end of the elastic hose in the pump head.

[0014] Furthermore, the discharge pipeline is communicated with the input pipeline, and a reflux path can be formed from the outlet end of the elastic hose to the input pipeline.

[0015] Furthermore, the driver drives the pump head to a predetermined starting position in response to a quantitative output start signal or a quantitative output end signal, and then drives the pipeline switching device to switch the outlet end of the elastic hose from a state connected to the discharge pipeline to a state connected to the metering pipeline.

[0016] Furthermore, the peristaltic pump precise quantitative control system also includes a position detection device capable of detecting whether the pump head has moved to a predetermined starting position. The driver is electrically connected to the position detection device to obtain a position detection signal indicating whether the pump head has moved to the predetermined starting position.

[0017] Furthermore, the driver includes a control board and a motor, and the control board is connected to the motor, the position detection device and the pipeline switching device respectively;

[0018] The position detection device is arranged on the motor or the pump head or on a connecting piece between the motor and the pump head.

[0019] Furthermore, the roller of the pump head has at least one roller, and the position detection device can detect whether any of the rollers has moved to a predetermined starting position; or

[0020] The position detection device includes a magnetic sensor and a magnet. The magnetic sensor is electrically connected to the driver and is arranged on the rear output shaft of the motor that drives the pump head to operate, and can detect the rotation of the magnet.

[0021] According to another aspect of the present invention, a control method for the peristaltic pump precise quantitative control system as described above is provided, the method comprising the following steps:

[0022] The driver obtains the position detection signal to determine whether the pump head has reached the predetermined starting position.

[0023] In response to the pump head not moving to the predetermined starting position, the driver controls the pipeline switching device so that the outlet end of the elastic hose is connected to the discharge pipeline, and the driver controls the pump head to continue moving toward the predetermined starting position;

[0024] In response to the pump head being in a predetermined starting position, the driver controls the pipeline switching device so that the outlet end of the elastic hose is connected to the metering pipeline, so that the driver can control and drive the pump head to operate and output a fixed amount of liquid.

[0025] According to another aspect of the present invention, a method for precise quantitative control of a peristaltic pump is provided, which comprises the following steps when performing quantitative fluid output:

[0026] Obtaining a position detection signal to determine whether the pump head has reached a predetermined starting position;

[0027] In response to the pump head not moving to the predetermined starting position, the outlet end of the peristaltic pump elastic hose is connected to the discharge pipeline, and the pump head is controlled to continue moving toward the predetermined starting position;

[0028] In response to the pump head being in a predetermined starting position, the outlet end of the peristaltic pump elastic hose is connected to the metering pipeline, thereby controlling and driving the pump head to operate and output a fixed amount of liquid.

[0029] Furthermore, in response to the quantitative output start signal or the quantitative output end signal, a position detection signal is acquired to determine whether the pump head has moved to a predetermined starting position.

[0030] Furthermore, the liquid discharged through the discharge pipeline flows back to the input end of the peristaltic pump.

[0031] Beneficial effects of the present invention: The peristaltic pump precise quantitative control system and control method proposed in the embodiment of the present invention, while retaining the original advantages of the peristaltic pump such as cleanliness, easy maintenance, and good controllability, realizes the precise quantitative delivery of the peristaltic pump, and has the advantages of simple structure, high quantitative accuracy, continuous operation, high delivery efficiency, low cost and wide adaptability (applicable to a variety of pump heads). The peristaltic pump precise quantitative control system is provided with a pipeline switching device and a discharge pipeline on the basis of the existing peristaltic pump. By judging the operating position of the pump head, the pipeline switching device is activated in time to switch the connection path, thereby realizing the discharge of liquid during the pump head adjustment process, and realizing that the starting position of the pump head is exactly the same each time the liquid is quantitatively output, eliminating the quantitative transmission error caused by the pulsation phenomenon, and having extremely high repeatability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of a peristaltic pump in the prior art;

[0033] Figure 2 Schematic diagram of the structure of a peristaltic pump precise quantitative control system according to an embodiment of the present invention;

[0034] Figure 3 1 is a circuit connection diagram of a peristaltic pump precise quantitative control system according to an embodiment of the present invention;

[0035] Figure 4 1 is a flowchart of the precise quantitative control system of the peristaltic pump according to an embodiment of the present invention;

[0036] Figure 5 Schematic diagram of liquid flow during discharge in a peristaltic pump precise quantitative control system according to an embodiment of the present invention;

[0037] Figure 6 Schematic diagram of liquid flow in the peristaltic pump precise quantitative control system during quantitative output according to an embodiment of the present invention;

[0038] Figure 7 Schematic diagram of the structure of a peristaltic pump precise quantitative control system according to another embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of liquid flow during discharge in a peristaltic pump precise quantitative control system according to another embodiment of the present invention;

[0040] Figure 9 4 is a flowchart of the precise quantitative control method of a peristaltic pump according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments and accompanying drawings. However, those skilled in the art will appreciate that the present invention is not limited to the accompanying drawings and the following embodiments.

[0042] The embodiment of the present invention provides a peristaltic pump precise quantitative control system, such as Figure 1 As shown, the peristaltic pump precise quantitative control system includes a driver 1, an input pipeline 6, a pump head 2, a pipeline switching device 4, a metering pipeline 3 and a discharge pipeline 5.

[0043] An elastic hose (not shown) is provided in the pump head 2. The inlet end of the elastic hose in the pump head 2 is connected to the input pipeline 6, and the outlet end of the elastic hose is connected to the pipeline switching device 4. Those skilled in the art will appreciate that the input pipeline 6 and the elastic hose in the pump head 2 can be a single pipeline or multiple interconnected pipelines; the outlet end of the elastic hose can be connected to the pipeline switching device 4 via another connecting pipe.

[0044] The pipeline switching device 4 can switch the outlet end of the elastic hose to communicate with the metering pipeline 3 or the discharge pipeline 5. The pipeline switching device 4 can be a pipeline switching device such as a rotary valve, a pinch valve, an isolation valve, a switching valve, a solenoid valve, and a diaphragm valve.

[0045] The driver 1 drives the pump head 2, causing the hose extrusion component in the pump head 2 to rotate, alternately squeezing and releasing the elastic hose in the pump head 2. This creates negative pressure within the elastic hose, pumping liquid from the input line 6 to the outlet of the elastic hose. The driver 1 is electrically connected to the line switching device 4. The driver 1 controls the line switching device 4 to switch the output line connected to the outlet of the elastic hose, so that the outlet of the elastic hose is connected to the metering line 3 or the discharge line 5.

[0046] The driver 1 drives the pump head 2 to a predetermined starting position, and then drives the pipeline switching device 4 to switch the outlet end of the elastic hose from being in communication with the discharge pipeline 5 to being in communication with the metering pipeline 3. Preferably, the driver 1 drives the pump head 2 to a predetermined starting position in response to a quantitative output start signal or a quantitative output end signal, and then drives the pipeline switching device 4 to switch the outlet end of the elastic hose from being in communication with the discharge pipeline 5 to being in communication with the metering pipeline 3. It will be understood by those skilled in the art that the pump head 2 can be driven to a predetermined starting position and the pipeline switching device 4 can be driven to switch the outlet end of the elastic hose from being in communication with the discharge pipeline 5 to being in communication with the metering pipeline 3 at any time after one quantitative output and before the next quantitative output.

[0047] Specifically, the peristaltic pump precise quantitative control system further includes a position detection device for detecting whether the pump head 2 has moved to a predetermined starting position. The position detection device can be provided on the motor, the pump head, or a connection between the motor and the pump head. The driver 1 is electrically connected to the position detection device to obtain a position detection signal indicating whether the pump head 2 has moved to a predetermined starting position. Specifically, the roller of the pump head 2 has at least one roller (see Figure 1 ), the position detection device detects whether any of the rollers has run to a predetermined starting position.

[0048] In a preferred embodiment of the present invention, the position detection device includes a magnetic sensor and a magnet. The magnetic sensor is located at the rear of the motor and is electrically connected to the driver 1. The magnet is located on the rear output shaft of the motor, and the magnetic sensor is capable of detecting the rotation of the magnet. Therefore, as the hose extrusion component rotates, the magnet on the motor rotates accordingly, causing the electrical signal of the magnetic sensor to change. This signal is then compared with the threshold value of the electrical signal from the magnetic sensing chip at the predetermined starting position, thereby determining whether the pump head 2 has reached the predetermined starting position.

[0049] In another preferred embodiment of the present invention, the position detection device includes a Hall sensor, which is arranged on a fixed hose extrusion component (such as Figure 1 The hose pressing block in the pump head is electrically connected to the driver 1; the magnetic steel is arranged on the rotating hose squeezing component of the pump head 2 (such as Figure 1 The magnet is positioned near the edge of the roller in the hose extrusion component, for example, on at least one of the rollers. Of course, when the roller is made of steel, no magnet is required. Thus, during the rotation of the rotating hose extrusion component, the magnet / steel roller thereon will reciprocate toward and away from the Hall effect sensor on the fixed hose extrusion component, causing the Hall effect sensor's electrical signal to change. Based on a comparison with the Hall effect sensor's electrical signal threshold at the predetermined starting position, it can be determined whether the pump head 2 has reached the predetermined starting position.

[0050] In addition, the position detection device can also be a photoelectric detection device, a proximity switch, a reed switch, etc.

[0051] Figure 3 Figure 2 shows a schematic diagram of the circuit connections for a precise quantitative control system for a peristaltic pump according to an embodiment of the present invention. Driver 1 comprises a control board, a motor, and a position detection device. The position detection device is mounted on the motor and detects the rotational position of the motor shaft. The control board is connected to the motor, the position detection device, and the pipeline switching device 4. The control board activates the motor, driving the pump head to deliver a fixed amount of liquid. The control board also controls pipeline switching device 4 based on instructions.

[0052] The peristaltic pump precise quantitative control system of the embodiment of the present invention performs quantitative output of fluid, such as Figure 4 As shown, the following steps are included:

[0053] The driver 1 obtains a position detection signal to determine whether the pump head 2 has moved to a predetermined starting position. The driver 1 obtains a position detection signal from a position detection device, and the position detection device detects whether the pump head 2 has moved to a predetermined starting position. Preferably, the driver 1 obtains a position detection signal in response to a quantitative output start signal or a quantitative output end signal to determine whether the pump head 2 has moved to a predetermined starting position. Those skilled in the art will understand that the driver 1 can obtain a position detection signal at any time after one quantitative output and before the next quantitative output to determine whether the pump head 2 has moved to a predetermined starting position.

[0054] When the pump head 2 does not move to the predetermined starting position, the driver 1 controls the pipeline switching device 4 so that the outlet end of the elastic hose is connected to the discharge pipeline 5. At this time, the outlet end of the elastic hose is not connected to the metering pipeline 3. Figure 5 The driver 1 controls the pump head 2 to continue to move toward the predetermined starting position. In the process, the liquid output from the elastic hose in the pump head 2 is discharged through the discharge line 5.

[0055] After the pump head 2 is in the predetermined starting position, the driver 1 controls the pipeline switching device 4 so that the outlet end of the elastic hose is connected to the metering pipeline 3. At this time, the outlet end of the elastic hose is not connected to the discharge pipeline 5. Figure 6 As shown, the driver 1 can control and drive the pump head 2 to operate and output a fixed amount of liquid.

[0056] The above process is repeated each time the peristaltic pump outputs liquid in a quantitative manner.

[0057] Based on the above description, those skilled in the art will know that the peristaltic pumps described in the embodiments of the present invention include but are not limited to rotary peristaltic pumps, piano-type peristaltic pumps and linear peristaltic pumps.

[0058] Therefore, the peristaltic pump precise quantitative control system of the embodiment of the present invention is provided with a pipeline switching device and a discharge pipeline on the basis of the existing peristaltic pump. By judging the operating position of the pump head, the pipeline switching device is started in time to switch the connection path, thereby realizing the discharge of liquid during the pump head adjustment process, and realizing that the starting position of the pump head is exactly the same each time the liquid is quantitatively output, eliminating the quantitative transmission error caused by the pulsation phenomenon, and the repeatability accuracy is extremely high.

[0059] Another embodiment of the present invention provides a peristaltic pump precise quantitative control system, such as Figure 7 、 Figure 8As shown, unlike the previous embodiment, the discharge line 5 is connected to the input line 6, and a reflux path can be formed from the outlet end of the elastic hose to the input line 6, so that the liquid discharged by the peristaltic pump can flow back to the input line 6, thereby improving the liquid utilization rate and avoiding the risk of contamination of the liquid after being discharged through the discharge line.

[0060] The embodiment of the present invention also provides a method for precise quantitative control of a peristaltic pump, when performing quantitative output of a fluid, such as Figure 9 As shown, the following steps are included:

[0061] Acquire a position detection signal to determine whether the pump head has moved to a predetermined starting position; preferably, in response to a quantitative output start signal or a quantitative output end signal, acquire a position detection signal to determine whether the pump head has moved to a predetermined starting position. It will be appreciated by those skilled in the art that the position detection signal may be acquired at any time between one quantitative output and the next quantitative output to determine whether the pump head has moved to a predetermined starting position;

[0062] In response to the pump head not moving to the predetermined starting position, the outlet end of the peristaltic pump elastic hose is connected to the discharge pipeline, and the pump head is controlled to move to the predetermined starting position. During this process, the liquid output from the elastic hose in the pump head 2 is discharged through the discharge pipeline 5;

[0063] In response to the pump head being in the predetermined starting position, the outlet end of the peristaltic pump elastic hose is connected to the metering pipeline, thereby controlling and driving the pump head 2 to operate and output a fixed amount of liquid.

[0064] Preferably, the liquid discharged through the discharge line flows back to the input end of the peristaltic pump.

[0065] The precise quantitative control method of the peristaltic pump of the present invention determines the operating position of the pump head and timely adjusts the connection path of the outlet end of the elastic hose of the peristaltic pump, thereby realizing the discharge of liquid during the pump head adjustment process and ensuring that the starting position of the pump head is exactly the same each time the liquid is quantitatively output, eliminating the quantitative transmission error caused by the pulsation phenomenon and achieving extremely high repeatability.

[0066] An embodiment of the present invention further provides a storage medium storing a computer program for executing the aforementioned method.

[0067] An embodiment of the present invention further provides a processor, which runs a computer program that executes the method described above.

[0068] In order to verify the technical effects of the peristaltic pump precise quantitative control system and control method according to the embodiments of the present invention, the inventors conducted the following tests:

[0069] 1. Experimental instruments: existing peristaltic pump, peristaltic pump of the present invention, YZ15 pump head (applicable to 13#, 14#, 17# hoses, flow range 3-990mL / min), YT25 pump head (applicable to 15#, 24#, 35# hoses, flow range 50-1600mL / min), YZ25 pump head (applicable to 15#, 24# hoses, flow range 50-990mL / min), high-precision electronic balance (accuracy 0.0001g), 13# silicone elastic hose (wall thickness 1. 7mm, inner diameter 0.8mm), 14# silicone elastic hose (wall thickness 1.7mm, inner diameter 1.6mm), 15# silicone elastic hose (wall thickness 2.4mm, inner diameter 4.8mm), 17# silicone elastic hose (wall thickness mm, inner diameter mm), 24# silicone elastic hose (wall thickness 2.4mm, inner diameter 6.4mm), 35# silicone elastic hose (wall thickness 2.4mm, inner diameter 7.9mm), 19# silicone elastic hose (wall thickness 1.6mm, inner diameter 2.4mm), solenoid valve;

[0070] 2. Test conditions: normal temperature and pressure, water as the transmission medium, the length of the peristaltic pump input and output pipes are both 0.5 meters;

[0071] 3. Calculation method: Four sets of experiments were conducted under each experimental condition to obtain filling data (the comparative data were measured at the outlet of the peristaltic pump elastic hose, and the example data were measured at the outlet of the metering pipeline). The motor speed, filling time, absolute error, and error rate were recorded, where:

[0072] Absolute error = maximum value - minimum value;

[0073] Error rate = absolute error / mean.

[0074] Test data table

[0075]

[0076]

[0077]

[0078] Those skilled in the art will appreciate that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0079] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0080] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement the hardware: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0081] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0082] The above describes the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A peristaltic pump precise quantitative control system, characterized in that: It includes a driver (1), a pump head (2), a pipeline switching device (4), a metering pipeline (3), a discharge pipeline (5) and a position detection device. The pump head (2) comprises a hose pressing block and a roller having at least one roller, at least one of the rollers being made of steel. An elastic hose is provided in the pump head (2), and the outlet end of the elastic hose is connected to a pipeline switching device (4); The pipeline switching device (4) is capable of switching the outlet end of the elastic hose to communicate with the metering pipeline (3) or the discharge pipeline (5); The driver (1) drives the pump head (2) to operate, pumping the liquid in the pipeline to the outlet end of the elastic hose; the driver (1) is electrically connected to the pipeline switching device (4), and can control the pipeline switching device (4) to switch the output pipeline connected to the outlet end of the elastic hose; The position detection device includes a Hall sensor, which is arranged on the hose pressure block of the pump head (2) and is electrically connected to the driver (1). During the rotation of the roller of the pump head (2), the roller of the steel material will reciprocate to approach or move away from the Hall sensor on the hose pressure block of the pump head (2), so that the position detection signal of the Hall sensor changes. Based on the comparison with the electrical signal threshold of the Hall sensor at the predetermined starting position, it is determined whether the pump head (2) has moved to the predetermined starting position. In response to the pump head (2) not moving to the predetermined starting position, the drive pipeline switching device (4) connects the outlet end of the peristaltic pump elastic hose with the discharge pipeline (5), and controls the pump head (2) to move toward the predetermined starting position; The driver (1) drives the pump head (2) to a predetermined starting position in response to a quantitative output start signal or a quantitative output end signal, and then drives the drive pipeline switching device (4) to switch the outlet end of the elastic hose from a state of communication with the discharge pipeline (5) to a state of communication with the metering pipeline (3).

2. The peristaltic pump precise quantitative control system according to claim 1, characterized in that: The peristaltic pump precise quantitative control system further comprises an input pipeline (6) which is in communication with the inlet end of the elastic hose in the pump head (2).

3. The peristaltic pump precise quantitative control system according to claim 2, characterized in that: The discharge pipeline (5) is in communication with the input pipeline (6), and can form a reflux path from the outlet end of the elastic hose to the input pipeline (6).

4. The peristaltic pump precise quantitative control system according to claim 1, characterized in that: The driver (1) comprises a control board and a motor, and the control board is connected to the motor, the position detection device and the pipeline switching device (4) respectively.

5. The control method of the peristaltic pump precise quantitative control system according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: The driver (1) obtains a position detection signal and determines whether the pump head (2) has moved to a predetermined starting position. In response to the pump head (2) not moving to the predetermined starting position, the driver (1) controls the pipeline switching device (4) so ​​that the outlet end of the elastic hose is connected to the discharge pipeline (5), and the driver (1) controls the pump head (2) to continue moving toward the predetermined starting position; In response to the pump head (2) being in a predetermined starting position, the driver (1) controls the pipeline switching device (4) so ​​that the outlet end of the elastic hose is connected to the metering pipeline (3), so that the driver (1) can control and drive the pump head (2) to operate and output a fixed amount of liquid.

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