Multi-channel piezoelectric injection valve controller and system and DNA sequencing equipment

Abstract

The utility model relates to the technical field of dispensing, and discloses a multichannel piezoelectric injection valve controller, a multichannel piezoelectric injection valve system and DNA (Deoxyribose Nucleic Acid) sequencing equipment. The multi-channel piezoelectric injection valve controller comprises a main control unit and a plurality of piezoelectric injection valve driving circuits, and the main control unit is connected with the piezoelectric injection valve driving circuits and outputs multiple paths of pulse width modulation waveform signals to the piezoelectric injection valve driving circuits; and the piezoelectric injection valve driving circuit is used for controlling the voltage at the two ends of the piezoelectric injection valve connected with the piezoelectric injection valve driving circuit according to one path of pulse width modulation waveform signal correspondingly output by the main control unit. Therefore, according to the utility model, the main control unit is connected with the plurality of piezoelectric injection valve driving circuits to output multiple paths of pulse width modulation waveform signals to the plurality of piezoelectric injection valve driving circuits, so that one controller can control the plurality of piezoelectric injection valve driving circuits at the same time, the integration level is high, the number of channels can be freely expanded according to user requirements, and the expansion is easy.

Description

TECHNICAL FIELD

[0001] The utility model relates to point gum technical field especially, it relates to a kind of multi-channel piezoelectric injection valve controller and system, DNA sequencing equipment. BACKGROUND

[0002] With the development of biological medicine industry, DNA (Deoxyribo Nucleic Acid, deoxyribonucleic acid) sequencing technology plays an increasingly important role in the field of biological medicine. DNA sequencing technology can analyze the genome of human DNA and other organisms, providing great help for the study of disease occurrence and treatment.

[0003] DNA sequencing is sequenced using DNA sequencing equipment (such as DNA sequencer), and the DNA sequencing equipment has high automation, provides continuous, unattended operation, automatic glue filling, sample loading, electrophoretic separation, detection and data analysis, and can run continuously for 24 hours without manual intervention.

[0004] In the DNA sequencing process, it is generally necessary to accurately add dozens of biological reagents, and the liquid adding equipment has high requirements. For example, the overall size of the packaged product is smaller, the density is higher, the mechanical and electrical connection performance is more excellent, the product service life is more durable, etc. The driving mode of the piezoelectric injection valve is more stable, the response frequency is faster, the single-point glue liquid volume is more accurate, and the glue point repeat accuracy is higher. Therefore, the piezoelectric injection valve is more suitable for liquid addition in DNA sequencing. In the DNA sequencing equipment, more than ten piezoelectric injection valves are often driven at the same time. At present, the piezoelectric injection valve controller in the DNA sequencing equipment can only control a single piezoelectric injection valve, resulting in low DNA sequencing efficiency. If multiple piezoelectric injection valve controllers are placed in the DNA sequencing equipment, the space occupied is too large, and the wiring is complex. UTILITY MODEL CONTENTS

[0005] The utility model embodiment aims to provide a kind of multi-channel piezoelectric injection valve controller and system, DNA sequencing equipment, to solve the problem that the existing piezoelectric injection valve controller can only control single piezoelectric injection valve, resulting in low DNA sequencing efficiency.

[0006] To solve the above technical problems, the utility model first aspect embodiment provides a kind of multi-channel piezoelectric injection valve controller, including main control unit and several piezoelectric injection valve drive circuits, wherein:

[0007] The main control unit is connected with several piezoelectric injection valve drive circuits, and is used to output multiple pulse width modulation waveform signals to several piezoelectric injection valve drive circuits, and one pulse width modulation waveform signal corresponds to control one piezoelectric injection valve drive circuit;

[0008] The piezoelectric injection valve drive circuit is used to control the voltage across the piezoelectric injection valve connected to it according to a pulse width modulation waveform signal output by the main control unit.

[0009] Optionally, the main control unit includes a main control module, several IO input signal interfaces, several IO output signal interfaces, and several waveform signal output interfaces, wherein:

[0010] The main control module is electrically connected to several of the IO input signal interfaces, several of the IO output signal interfaces and several of the waveform signal output interfaces, respectively, and is used to control several of the IO input signal interfaces, several of the IO output signal interfaces and several of the waveform signal output interfaces;

[0011] The IO input signal interface is used to receive IO input signals from external devices to the main control unit;

[0012] The IO output signal interface is used to output the IO output signal of the main control unit to an external IO load device;

[0013] The waveform signal output interface is used to output the pulse width modulation waveform signal of the main control unit to the piezoelectric injection valve drive circuit.

[0014] Optionally, the multi-channel piezoelectric injection valve controller further includes an IO input circuit, which is connected to the main control unit and is used to output the IO input signal output by the host computer to the main control unit.

[0015] Optionally, the IO input circuit includes a photodiode, a first filter unit, and an optocoupler;

[0016] The positive terminal of the photodiode is connected to the host computer, and the negative terminal of the photodiode is connected to the input terminal of the optocoupler. The photodiode is used to receive the IO input signal output by the host computer and output it to the optocoupler.

[0017] The first filtering unit is connected to the negative terminal of the photodiode and is used to filter the output signal of the negative terminal of the photodiode.

[0018] The input terminal of the optocoupler is connected to the negative terminal of the photodiode, and the output terminal of the optocoupler is connected to the IO input signal interface of the main control unit, so as to couple the IO input signal output by the host computer to the main control unit after passing through the photodiode.

[0019] Optionally, the multi-channel piezoelectric injection valve controller further includes an IO output circuit, which is connected to the main control unit and is used to output the IO output signal output by the main control unit to an external IO load device connected thereto.

[0020] Optionally, the IO output circuit includes an IO output signal receiving unit and an IO output signal conversion unit; wherein:

[0021] The IO output signal receiving unit is connected to the IO output signal interface of the main control unit and is used to receive the IO output signal output by the main control unit.

[0022] The IO output signal conversion unit is connected to the IO output signal receiving unit and is used to convert the IO output signal received by the IO output signal receiving unit into a signal that matches the external IO load device connected to it, and output it to the external IO load device connected to it.

[0023] Optionally, the piezoelectric injection valve drive circuit includes a waveform signal conversion circuit and a switching circuit, wherein:

[0024] The waveform signal conversion circuit is connected to the waveform signal output interface of the main control unit, and is used to receive the pulse width modulation waveform signal output by the main control unit through the waveform signal output interface, convert it into a switching signal, and output it to the switching circuit.

[0025] The switching circuit is connected to the waveform signal conversion circuit and is used to control the voltage across the piezoelectric injection valve connected thereto based on the switching signal output by the waveform signal conversion circuit.

[0026] Optionally, the multi-channel piezoelectric injection valve controller further includes an RS485 communication unit, and the main control unit further includes an RS485 communication interface; the RS485 communication unit is communicatively connected to the RS485 communication interface to enable the multi-channel piezoelectric injection valve controller to communicate with the host computer.

[0027] Accordingly, a second aspect of the present invention provides a multi-channel piezoelectric injection valve control system, including the multi-channel piezoelectric injection valve controller described in the first aspect of the present invention and a plurality of piezoelectric injection valves;

[0028] The multi-channel piezoelectric injection valve controller is connected to several of the piezoelectric injection valves and is used to output multiple pulse width modulation waveform signals to control the voltage at both ends of the corresponding connected piezoelectric injection valves.

[0029] Accordingly, a third aspect of the present invention provides a DNA sequencing device, including the multi-channel piezoelectric jet valve control system described in the second aspect of the present invention.

[0030] Compared with existing technologies, this invention provides a multi-channel piezoelectric jet valve controller and system, and a DNA sequencing device. The multi-channel piezoelectric jet valve controller includes a main control unit and several piezoelectric jet valve drive circuits. The main control unit is connected to the several piezoelectric jet valve drive circuits and outputs multiple pulse width modulation (PWM) waveform signals to each circuit. Each PWM waveform signal controls one piezoelectric jet valve drive circuit. The piezoelectric jet valve drive circuit controls the voltage across the connected piezoelectric jet valve based on the PWM waveform signal output by the main control unit. Therefore, this invention, by connecting the main control unit to several piezoelectric jet valve drive circuits and outputting multiple PWM waveform signals, enables a single controller to simultaneously control multiple piezoelectric jet valve drive circuits. This integrates multi-channel piezoelectric jet valve control into a single controller, resulting in high integration, small footprint, and the ability to freely expand the number of channels according to user needs. This solves the problem of low DNA sequencing efficiency caused by existing piezoelectric jet valve controllers that can only control a single piezoelectric jet valve. Attached Figure Description

[0031] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0032] Figure 1 This is a schematic diagram of the structure of a multi-channel piezoelectric injection valve controller provided by this utility model;

[0033] Figure 2 This is a schematic diagram of the main control unit in a multi-channel piezoelectric injection valve controller provided by this utility model;

[0034] Figure 3 This is a schematic diagram of the IO input circuit in a multi-channel piezoelectric injection valve controller provided by this utility model; a structural schematic diagram.

[0035] Figure 4 This is a schematic diagram of the IO output circuit in a multi-channel piezoelectric jet valve controller provided by this utility model;

[0036] Figure 5 This is a schematic diagram of the piezoelectric injection valve drive circuit in a multi-channel piezoelectric injection valve controller provided by this utility model;

[0037] Figure 6 This is a schematic diagram of the power supply circuit in a multi-channel piezoelectric injection valve controller provided by this utility model;

[0038] Figure 7This is a schematic diagram of the structure of a multi-channel piezoelectric injection valve control system provided by this utility model;

[0039] Figure 8 This is a schematic diagram of the structure of a DNA sequencing device provided by this utility model.

[0040] The reference numerals in the attached figures are shown in the table below:

[0041] Channel piezoelectric jet valve controller 10 Master unit 11 Master module 111 IO input signal interface 112 IO output signal interface 113 Waveform signal output interface 114 RS485 communication interface 115 Programmer communication interface 116 Power supply interface 117 Piezoelectric jet valve drive circuit 12 Waveform signal conversion circuit 121 Switching circuit 122 IO input circuit 13 IO output circuit 14 IO output signal receiving unit 141 IO output signal conversion unit 142 Photodiode D1 First filter unit L1 Optocoupler G1 First resistor R1 First capacitor C1 Second capacitor C2 Third capacitor C3 Diode D2 First NMOS tube Q1 Second NMOS tube Q2 RS485 communication unit 15 Power supply circuit 16 Buck unit 161 Rectification unit 162 Second filter unit 163 Transformer T1 Piezoelectric jet valve 20 Human-computer interaction unit 30 Host computer 40 Multi-channel piezoelectric jet valve control system 100 Detailed Implementation

[0042] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0044] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] In one embodiment, such as Figure 1 As shown, this utility model provides a multi-channel piezoelectric injection valve controller 10, including: a main control unit 11 and several piezoelectric injection valve drive circuits 12;

[0046] The main control unit 11 is connected to several piezoelectric injection valve drive circuits 12 and is used to output multiple pulse width modulation (PWM) waveform signals to several piezoelectric injection valve drive circuits 12. One pulse width modulation waveform signal controls one piezoelectric injection valve drive circuit 12.

[0047] The piezoelectric injection valve drive circuit 12 is used to control the voltage across the piezoelectric injection valve 20 connected to it according to a pulse width modulation waveform signal output by the main control unit 11.

[0048] In this embodiment, a multi-channel piezoelectric jet valve controller is provided, including a main control unit and several piezoelectric jet valve drive circuits. The main control unit is connected to the several piezoelectric jet valve drive circuits and outputs multiple pulse width modulation waveform signals to the several piezoelectric jet valve drive circuits. Each pulse width modulation waveform signal controls one piezoelectric jet valve drive circuit. The piezoelectric jet valve drive circuit controls the voltage across the piezoelectric jet valve connected to it according to the corresponding pulse width modulation waveform signal output by the main control unit. Therefore, this utility model, by connecting the main control unit to several piezoelectric jet valve drive circuits and outputting multiple pulse width modulation waveform signals to the several piezoelectric jet valve drive circuits, enables one controller to simultaneously control multiple piezoelectric jet valve drive circuits. This integrates multi-channel piezoelectric jet valve control into a single controller, resulting in high integration, small footprint, and the ability to freely expand the number of channels according to user needs. This solves the problem of low DNA sequencing efficiency caused by existing piezoelectric jet valve controllers that can only control a single piezoelectric jet valve.

[0049] In one embodiment, the main control unit 11 is connected to several piezoelectric injection valve drive circuits 12 and is used to output multiple pulse width modulation waveform signals to several piezoelectric injection valve drive circuits 12, with each pulse width modulation waveform signal corresponding to control one piezoelectric injection valve drive circuit 12.

[0050] Specifically, such as Figure 2 As shown, the main control unit 11 includes: a main control module 111, several IO input signal interfaces 112, several IO output signal interfaces 113, several waveform signal output interfaces 114, an RS485 communication interface 115, a programmer communication interface 116, and a power interface 117, wherein:

[0051] The main control module 111 is electrically connected to several IO input signal interfaces 112, several IO output signal interfaces 113, several waveform signal output interfaces 114, RS485 communication interface 115 and programmer communication interface 116 respectively, and is used to control the several IO input signal interfaces 112, several IO output signal interfaces 113, several waveform signal output interfaces 114, RS485 communication interface 115 and programmer communication interface 116.

[0052] The I / O input signal interface 112 is used to receive I / O input signals from external devices to the main control unit 11 (specifically, the main control module 111 within the main control unit 11). For example, such as... Figure 2 As shown, the main control unit 11 includes two I / O input signal interfaces 112, namely TRIG_IN1 and TRIG_IN2. It can be understood that the main control unit 11 is not limited to including two I / O input signal interfaces 112, but may also include more than two I / O input signal interfaces 112.

[0053] The IO output signal interface 113 is used to output the IO output signals of the main control unit 11 (specifically, the main control module 111 within the main control unit 11) to an external IO load device. For example, such as... Figure 2 As shown, the main control unit 11 includes two IO output signal interfaces 113, namely TRIG_OUT1 and TRIG_OUT2. It can be understood that the main control unit 11 is not limited to including two IO output signal interfaces 113, but also includes more than two IO output signal interfaces 113.

[0054] The waveform signal output interface 114 is used to output the pulse width modulation waveform signal output by the main control unit 11 (specifically, the main control module 111 within the main control unit 11) to the piezoelectric injection valve drive circuit 12. For example, such as Figure 2 As shown, the main control unit includes 6 waveform signal output interfaces 114, namely (LIN1,HIN1), (LIN2,HIN2), (LIN3,HIN3), (LIN4,HIN4), (LIN5,HIN5), and (LIN6,HIN6). The main control module 111 can output 6 pulse width modulation waveform signals to the corresponding 6 piezoelectric injection valve drive circuits 12 through the above 6 waveform signal output interfaces 114.

[0055] The RS485 communication interface 115 is used for communication between the main control unit 11 (specifically the main control module 111 in the main control unit 11) and the RS485 communication unit.

[0056] The programmer communication interface 116 is used to connect the main control unit 11 (specifically, the main control module 111 within the main control unit 11) to the human-machine interface unit 30 (e.g., a handheld programmer). The user edits the parameters of the multi-channel piezoelectric injection valve controller 10 through the human-machine interface unit 30 and inputs these parameters to the main control unit 11 via the programmer communication interface 116, thus enabling the input and display of parameters for the multi-channel piezoelectric injection valve controller 10. For example, the programmer communication interface 116 can be a UART communication interface.

[0057] The power interface 117 is used to connect to the power supply circuit 16, which supplies power to each module unit of the main control unit 11 through the power interface 117.

[0058] Understandably, the main control unit 11 is a device or component with signal processing capabilities. For example, the main control unit 11 can be a general-purpose processor, a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), or other programmable logic devices; the general-purpose processor can be a microprocessor, an MCU (Microcontroller Unit), or any conventional processor, etc.

[0059] In this embodiment, the main control unit is connected to several piezoelectric injection valve drive circuits and outputs multiple pulse width modulation waveform signals to several piezoelectric injection valve drive circuits, so that one controller can control multiple piezoelectric injection valve drive circuits at the same time. This integrates the control of multiple piezoelectric injection valves into the same controller, which has high integration, small space occupation, and can freely expand the number of channels according to user needs, making it easy to expand.

[0060] In one embodiment, such as Figure 1 As shown, the multi-channel piezoelectric injection valve controller 10 also includes an IO input circuit 13 and an IO output circuit 14.

[0061] The IO input circuit 13 is connected to the main control unit 11 (specifically, the main control module 111 within the main control unit 11) and is used to output the IO input signal from the host computer 40 to the main control unit 11 (specifically, the main control module 111 within the main control unit 11), so that the main control unit 11 (specifically, the main control module 111 within the main control unit 11) can detect the signal change and output a corresponding control signal to other modules of the multi-channel piezoelectric injection valve controller 10. In addition, the IO input circuit 13 is also used to read signals from external digital sensors and send them to the multi-channel piezoelectric injection valve controller 10.

[0062] Specifically, such as Figure 3As shown, the IO input circuit 13 is described using one of the IO input circuits 13 as an example. The IO input circuit 13 includes: a photodiode D1, a first filter unit L1, and an optocoupler G1, wherein:

[0063] The positive terminal of photodiode D1 is connected to the output terminal INPUT_COM1 of the host computer 40, and the negative terminal of photodiode D1 is connected to the input terminal of optocoupler G1. Photodiode D1 is used to receive the IO input signal output by the host computer and output it to optocoupler G1.

[0064] The first filtering unit L1 is connected to the negative terminal of photodiode D1 and is used to filter the output signal of the negative terminal of photodiode D1.

[0065] For example, such as Figure 3 As shown, the first filter unit L1 includes a first resistor R1 and a first capacitor C1 connected in parallel. The first end of the first resistor R1 and the first end of the first capacitor C1 are connected to the negative terminal of the photodiode D1, and the second end of the first resistor R1 and the second end of the first capacitor C1 are connected to the other end INPUT1 of the host computer 40.

[0066] The input terminal of optocoupler G1 is connected to the negative terminal of photodiode D1, and the output terminal of optocoupler G1 is connected to the IO input signal interface 112 of the main control unit 11. It is used to couple the IO input signal output by the host computer to the main control unit 11 (specifically the main control module 111 in the main control unit 11) after passing through photodiode D1.

[0067] The IO output circuit 14 is connected to the main control unit 11 (specifically the main control module 111 in the main control unit 11) and is used to output the IO output signal output by the main control unit 11 to the external IO load device connected to it. The IO output signal includes buzzer alarm signal, IO communication alarm signal and / or solenoid valve control signal, etc.

[0068] Specifically, such as Figure 4 As shown, the IO output circuit 14 is described using one of the IO output circuits 14 as an example. The IO output circuit 14 includes: an IO output signal receiving unit 141 and an IO output signal conversion unit 142; wherein:

[0069] The IO output signal receiving unit 141 is connected to the IO output signal interface 113 of the main control unit 11 and is used to receive the IO output signals output by the main control unit 11. Specifically, the IO output signal receiving unit 141 receives the IO output signal TRIG_OUT1 output by the main control module 111 of the main control unit 11 via the IO output signal interface 113. Figure 4In this configuration, the IO output signal receiving unit 141 can receive two IO output signals, namely IO output signal TRIG_OUT1 and IO output signal TRIG_OUT2. For example, the IO output signal receiving unit 141 can be an IO output signal receiving chip.

[0070] The IO output signal conversion unit 142 is connected to the IO output signal receiving unit 141, and is used to convert the IO output signal received by the IO output signal receiving unit 141 into a signal that matches the external IO load device connected to it, and output the signal to the external IO load device connected to it. Specifically, the IO output signal conversion unit 142 converts the IO output signal TRIG_OUT1 received by the IO output signal receiving unit 141 into a signal OUT1 that matches the external IO load device connected to it. Figure 4 In this configuration, the IO output signal conversion unit 142 can receive and convert two IO output signals, converting IO output signals TRIG_OUT1 and TRIG_OUT2 into signals OUT1 and OUT2, respectively. For example, the IO output signal conversion unit 142 can be an IO output signal conversion chip.

[0071] In one embodiment, the multi-channel piezoelectric injection valve controller 10 includes several piezoelectric injection valve drive circuits 12, each piezoelectric injection valve drive circuit 12 being used to control the voltage across the piezoelectric injection valve 20 connected thereto according to a pulse width modulation waveform signal output by the main control unit 11.

[0072] For example, such as Figure 1 and Figure 2 As shown, the multi-channel piezoelectric injection valve controller 10 includes six piezoelectric injection valve drive circuits 12, which can control the voltage across the six piezoelectric injection valves 20 connected to it according to the six pulse width modulation waveform signals output by the main control unit 11.

[0073] Specifically, such as Figure 5 As shown, the piezoelectric injection valve drive circuit 12 is described using one example. The piezoelectric injection valve drive circuit 12 includes: a waveform signal conversion circuit 121 and a switching circuit 122, wherein:

[0074] The waveform signal conversion circuit 121 is connected to the waveform signal output interface 114 of the main control unit 11. It is used to receive the pulse width modulation waveform signal output by the main control unit 11 through the waveform signal output interface 114, convert it into a switching signal, and output it to the switching circuit 122.

[0075] The switching circuit 122 is connected to the waveform signal conversion circuit 121 and is used to control the voltage across the piezoelectric injection valve 20 (ACTUATOR_1+, ACTUATOR_1-) connected to it based on the switching signal output by the waveform signal conversion circuit 121.

[0076] For example, such as Figure 5 As shown, the waveform signal conversion circuit 121 includes a waveform signal conversion chip, which is connected to the waveform signal output interface 114 (LIN1 and HIN1) of the main control unit 11. The waveform signal conversion chip is used to receive the pulse width modulation waveform signal output by the main control unit 11 through the waveform signal output interface 114 (LIN1 and HIN1) and output the switching signals (HO and LO) of the switching circuit 122.

[0077] Specifically, the waveform signal conversion chip includes a waveform signal input interface (LIN and HIN) and a switch signal output interface (HO and LO). The waveform signal input interface of the waveform signal conversion chip is connected to the waveform signal output interface 114 (LIN1 and HIN1) of the main control unit 11, and is used to receive the pulse width modulation waveform signal output by the main control unit 11 through the waveform signal output interface 114 (LIN1 and HIN1). The switch signal output interface (HO and LO) is used to output the switch signals (HO and LO) of the switch circuit 122.

[0078] The switching circuit 122 includes a first NMOS transistor Q1 and a second NMOS transistor Q2. The gate of the first NMOS transistor Q1 is connected to one of the pins (HO) of the switching signal output interface of the waveform signal conversion chip, and receives the HO signal output by the waveform signal conversion chip through one of the pins (HO) of the switching signal output interface. The drain of the first NMOS transistor Q1 is connected to the reference voltage terminal (120V). The source of the first NMOS transistor Q1 is connected to the drain of the second NMOS transistor Q2. The gate of the second NMOS transistor Q2 is connected to the other pin (LO) of the switching signal output interface of the waveform signal conversion chip, and receives the LO signal output by the waveform signal conversion chip through the other pin (LO) of the switching signal output interface. The source of the second NMOS transistor Q2 is grounded. The connection between the source of the first NMOS transistor Q1 and the drain of the second NMOS transistor Q2 serves as the output terminal of the piezoelectric injection valve drive circuit, outputting a switching signal to the piezoelectric injection valve connected thereto.

[0079] It is understandable that the aforementioned NMOS transistor can also be replaced by other types of transistors such as PMOS transistors or IGBTs (Insulated-Gate Bipolar Transistors).

[0080] If the MOS is a PMOS transistor, the switching circuit 122 includes a first PMOS transistor and a second PMOS transistor. The gate of the first PMOS transistor is connected to one of the pins (HO) of the switching signal output interface of the waveform signal conversion chip, and receives the HO signal output by the waveform signal conversion chip through one of the pins (HO) of the switching signal output interface. The source of the first PMOS transistor is connected to the reference voltage terminal (120V). The drain of the first PMOS transistor is connected to the source of the second PMOS transistor. The gate of the second PMOS transistor is connected to another pin (LO) of the switching signal output interface of the waveform signal conversion chip, and receives the LO signal output by the waveform signal conversion chip through the other pin (LO) of the switching signal output interface. The drain of the second PMOS transistor is grounded. The connection between the drain of the first PMOS transistor and the source of the second PMOS transistor serves as the output terminal of the piezoelectric injection valve drive circuit, outputting a switching signal to the piezoelectric injection valve connected thereto.

[0081] In one embodiment, such as Figure 1 and Figure 2 As shown, the multi-channel piezoelectric injection valve controller 10 also includes an RS485 communication unit 15, which is connected to the RS485 communication interface 115 of the main control unit 11 to enable the multi-channel piezoelectric injection valve controller 10 to communicate with the host computer 40 via RS485, thus facilitating automated control.

[0082] In one embodiment, such as Figure 1 and Figure 2 As shown, the multi-channel piezoelectric injection valve controller 10 also includes a power supply circuit 16, which is connected to each module unit (main control unit 11, several piezoelectric injection valve drive circuits 12, several IO input circuits 13, several output circuits 14, and RS485 communication unit 15) in the multi-channel piezoelectric injection valve controller 10. The power supply circuit 16 is used to step down the AC power supply and convert it into several DC currents to provide power to each module unit (main control unit 11, several piezoelectric injection valve drive circuits 12, several IO input circuits 13, several output circuits 14, and RS485 communication unit 15) in the multi-channel piezoelectric injection valve controller 10.

[0083] Specifically, the power supply circuit 16 steps down the AC 220V power supply to three DC power supplies: 24V, 120V, and 15V, which provide power to each module unit in the multi-channel piezoelectric injection valve controller 10.

[0084] like Figure 6As shown, the power supply circuit 16 includes a step-down unit 161, several rectifier units 162, and several second filter units 163. The step-down unit 161 is connected to the several rectifier units 162, and the several rectifier units 162 and the several second filter units 163 are connected in a one-to-one correspondence.

[0085] The step-down unit 161 is used to step down the AC power supply into several AC currents, and each AC current power supply is input to a rectifier unit 162.

[0086] Specifically, the step-down unit 161 includes a transformer T1. The primary coil of transformer T1 receives the input of external AC power, and the secondary coil of transformer T1 includes multiple AC power output terminals. Each AC power output terminal outputs one AC power source, thus stepping down the AC power into several AC current sources. Each AC current source is input into a rectifier unit 162. For example, transformer T1 is used to step down a 220V AC power supply to three AC power sources: 24V, 120V, and 15V.

[0087] The rectifier unit 162 is used to convert one AC power input to the rectifier unit 162 into a DC power supply.

[0088] Specifically, the rectifier unit 162 includes a diode D2 and a second capacitor C2 connected in parallel with the diode D2. The positive terminal of the diode D2 is connected to one AC power output terminal of the secondary coil of the transformer T1, and the negative terminal of the diode D2 outputs one DC power, thereby enabling the diode D2 to convert one AC power output from the secondary coil of the transformer T1 into one DC power. The second capacitor C2 is used to filter one AC power output from the secondary coil of the transformer T1 to filter out interference signals in the AC power.

[0089] The second filter unit 163 is connected to the output terminal of the rectifier unit 162 and is used to filter the DC power supply output by the rectifier unit 162.

[0090] Specifically, the second filter unit 163 includes a third capacitor C3, which is used to filter the DC power supply output from the negative terminal of diode D2.

[0091] Based on the same concept, such as Figure 7 As shown, this utility model also provides a multi-channel piezoelectric injection valve control system 100, including the multi-channel piezoelectric injection valve controller 10 described in any of the above embodiments and a plurality of piezoelectric injection valves 20. The multi-channel piezoelectric injection valve controller 10 is connected to the plurality of piezoelectric injection valves 20 and is used to output multiple pulse width modulation waveform signals to control the voltage at both ends of the corresponding connected piezoelectric injection valves 20 respectively.

[0092] Furthermore, such as Figure 7As shown, the multi-channel piezoelectric injection valve control system 100 also includes a human-machine interface unit 30 and a host computer 40; wherein:

[0093] The human-machine interface unit 30 is connected to the multi-channel piezoelectric injection valve controller 10 for human-machine interaction, enabling the input and display of parameters of the multi-channel piezoelectric injection valve controller 10. For example, the human-machine interface unit 30 is a handheld programmer. Therefore, the parameters of the multi-channel piezoelectric injection valve controller 10 can be debugged through the human-machine interface unit 30 (e.g., a handheld programmer), making operation convenient.

[0094] The host computer 40 is connected to the multi-channel piezoelectric injection valve controller 10 for data communication.

[0095] Specifically, the host computer 40 communicates with the main control unit 11 (specifically the main control module 111 in the main control unit 11) via the RS485 communication interface 115 and RS485 communication unit of the main control unit 11 of the multi-channel piezoelectric injection valve controller 10.

[0096] In this embodiment, a multi-channel piezoelectric jet valve control system is provided, comprising a multi-channel piezoelectric jet valve controller, several piezoelectric jet valves, a human-machine interface unit, and a host computer. The multi-channel piezoelectric jet valve controller includes a main control unit and several piezoelectric jet valve drive circuits. The main control unit is connected to the several piezoelectric jet valve drive circuits and outputs multiple pulse width modulation (PWM) waveform signals to the several piezoelectric jet valve drive circuits. The piezoelectric jet valve drive circuits control the voltage across the connected piezoelectric jet valves according to the corresponding PWM waveform signal output by the main control unit. This allows one controller to simultaneously control multiple piezoelectric jet valve drive circuits, integrating multi-channel piezoelectric jet valve control into a single controller. This results in high integration, small footprint, and the ability to freely expand the number of channels according to user needs, making it easy to expand and more convenient for end users. Furthermore, the parameters of the multi-channel piezoelectric jet valve controller can be debugged through the human-machine interface unit (e.g., a handheld programmer), making operation convenient. This solves the problem of low DNA sequencing efficiency caused by the piezoelectric jet valve controller's ability to control only a single piezoelectric jet valve in existing multi-channel piezoelectric jet valve control systems.

[0097] Specifically, the multi-channel piezoelectric injection valve controller 10 includes: a main control unit 11 and several piezoelectric injection valve drive circuits 12, wherein:

[0098] The main control unit 11 is connected to several piezoelectric injection valve drive circuits 12 and is used to output multiple pulse width modulation (PWM) waveform signals to several piezoelectric injection valve drive circuits 12. One pulse width modulation waveform signal controls one piezoelectric injection valve drive circuit 12.

[0099] Specifically, such as Figure 2 and Figure 7 As shown, the main control unit 11 includes: a main control module 111, several IO input signal interfaces 112, several IO output signal interfaces 113, several waveform signal output interfaces 114, an RS485 communication interface 115, a programmer communication interface 116, and a power interface 117, wherein:

[0100] The main control module 111 is electrically connected to several IO input signal interfaces 112, several IO output signal interfaces 113, several waveform signal output interfaces 114, RS485 communication interface 115 and programmer communication interface 116 respectively, and is used to control the several IO input signal interfaces 112, several IO output signal interfaces 113, several waveform signal output interfaces 114, RS485 communication interface 115 and programmer communication interface 116.

[0101] The I / O input signal interface 112 is used to receive I / O input signals from external devices to the main control unit 11 (specifically, the main control module 111 within the main control unit 11). For example, such as... Figure 2 As shown, the main control unit 11 includes two I / O input signal interfaces 112, namely TRIG_IN1 and TRIG_IN2. It can be understood that the main control unit 11 is not limited to including two I / O input signal interfaces 112, but may also include more than two I / O input signal interfaces 112.

[0102] The IO output signal interface 113 is used to output the IO output signals of the main control unit 11 (specifically, the main control module 111 within the main control unit 11) to an external IO load device. For example, such as... Figure 2 As shown, the main control unit 11 includes two IO output signal interfaces 113, namely TRIG_OUT1 and TRIG_OUT2. It can be understood that the main control unit 11 is not limited to including two IO output signal interfaces 113, but also includes more than two IO output signal interfaces 113.

[0103] The waveform signal output interface 114 is used to output the pulse width modulation waveform signal output by the main control unit 11 (specifically, the main control module 111 within the main control unit 11) to the piezoelectric injection valve drive circuit 12. For example, such as Figure 2As shown, the main control unit includes 6 waveform signal output interfaces 114, namely (LIN1,HIN1), (LIN2,HIN2), (LIN3,HIN3), (LIN4,HIN4), (LIN5,HIN5), and (LIN6,HIN6). The main control module 111 can output 6 pulse width modulation waveform signals to the corresponding 6 piezoelectric injection valve drive circuits 12 through the above 6 waveform signal output interfaces 114.

[0104] The RS485 communication interface 115 is used for communication between the main control unit 11 (specifically the main control module 111 in the main control unit 11) and the RS485 communication unit.

[0105] The programmer communication interface 116 is used to connect the main control unit 11 (specifically, the main control module 111 within the main control unit 11) to the human-machine interface unit 30 (e.g., a handheld programmer). The user edits the parameters of the multi-channel piezoelectric injection valve controller 10 through the human-machine interface unit 30 and inputs these parameters to the main control unit 11 via the programmer communication interface 116, thus enabling the input and display of parameters for the multi-channel piezoelectric injection valve controller 10. For example, the programmer communication interface 116 can be a UART communication interface.

[0106] The power interface 117 is used to connect to the power supply circuit 16, which supplies power to each module unit of the main control unit 11 through the power interface 117.

[0107] Understandably, the main control unit 11 is a device or component with signal processing capabilities. For example, the main control unit 11 can be a general-purpose processor, a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), or other programmable logic devices; the general-purpose processor can be a microprocessor, an MCU (Microcontroller Unit), or any conventional processor, etc.

[0108] In one embodiment, such as Figure 1 and Figure 7 As shown, the multi-channel piezoelectric injection valve controller 10 also includes an IO input circuit 13 and an IO output circuit 14.

[0109] The IO input circuit 13 is connected to the main control unit 11 (specifically, the main control module 111 within the main control unit 11) and is used to output the IO input signal from the host computer 40 to the main control unit 11 (specifically, the main control module 111 within the main control unit 11), so that the main control unit 11 (specifically, the main control module 111 within the main control unit 11) can detect the signal change and output a corresponding control signal to other modules of the multi-channel piezoelectric injection valve controller 10. In addition, the IO input circuit 13 is also used to read signals from external digital sensors and send them to the multi-channel piezoelectric injection valve controller 10.

[0110] Specifically, such as Figure 3 As shown, the IO input circuit 13 is described using one of the IO input circuits 13 as an example. The IO input circuit 13 includes: a photodiode D1, a first filter unit L1, and an optocoupler G1, wherein:

[0111] The positive terminal of photodiode D1 is connected to the output terminal INPUT_COM1 of the host computer 40, and the negative terminal of photodiode D1 is connected to the input terminal of optocoupler G1. Photodiode D1 is used to receive the IO input signal output by the host computer and output it to optocoupler G1.

[0112] The first filtering unit L1 is connected to the negative terminal of photodiode D1 and is used to filter the output signal of the negative terminal of photodiode D1.

[0113] For example, such as Figure 3 As shown, the first filter unit L1 includes a first resistor R1 and a first capacitor C1 connected in parallel. The first end of the first resistor R1 and the first end of the first capacitor C1 are connected to the negative terminal of the photodiode D1, and the second end of the first resistor R1 and the second end of the first capacitor C1 are connected to the other end INPUT1 of the host computer 40.

[0114] The input terminal of optocoupler G1 is connected to the negative terminal of photodiode D1, and the output terminal of optocoupler G1 is connected to the IO input signal interface 112 of the main control unit 11. It is used to couple the IO input signal output by the host computer to the main control unit 11 (specifically the main control module 111 in the main control unit 11) after passing through photodiode D1.

[0115] The IO output circuit 14 is connected to the main control unit 11 (specifically the main control module 111 in the main control unit 11) and is used to output the IO output signal output by the main control unit 11 to the external IO load device connected to it. The IO output signal includes buzzer alarm signal, IO communication alarm signal and / or solenoid valve control signal, etc.

[0116] Specifically, such as Figure 4As shown, the IO output circuit 14 is described using one of the IO output circuits 14 as an example. The IO output circuit 14 includes: an IO output signal receiving unit 141 and an IO output signal conversion unit 142; wherein:

[0117] The IO output signal receiving unit 141 is connected to the IO output signal interface 113 of the main control unit 11 and is used to receive the IO output signals output by the main control unit 11. Specifically, the IO output signal receiving unit 141 receives the IO output signal TRIG_OUT1 output by the main control module 111 of the main control unit 11 via the IO output signal interface 113. Figure 4 In this configuration, the IO output signal receiving unit 141 can receive two IO output signals, namely IO output signal TRIG_OUT1 and IO output signal TRIG_OUT2. For example, the IO output signal receiving unit 141 can be an IO output signal receiving chip.

[0118] The IO output signal conversion unit 142 is connected to the IO output signal receiving unit 141, and is used to convert the IO output signal received by the IO output signal receiving unit 141 into a signal that matches the external IO load device connected to it, and output the signal to the external IO load device connected to it. Specifically, the IO output signal conversion unit 142 converts the IO output signal TRIG_OUT1 received by the IO output signal receiving unit 141 into a signal OUT1 that matches the external IO load device connected to it. Figure 4 In this configuration, the IO output signal conversion unit 142 can receive and convert two IO output signals, converting IO output signals TRIG_OUT1 and TRIG_OUT2 into signals OUT1 and OUT2, respectively. For example, the IO output signal conversion unit 142 can be an IO output signal conversion chip.

[0119] In one embodiment, the multi-channel piezoelectric injection valve controller 10 includes several piezoelectric injection valve drive circuits 12, each piezoelectric injection valve drive circuit 12 being used to control the voltage across the piezoelectric injection valve 20 connected thereto according to a pulse width modulation waveform signal output by the main control unit 11.

[0120] For example, such as Figure 1 , Figure 2 and Figure 7 As shown, the multi-channel piezoelectric injection valve controller 10 includes six piezoelectric injection valve drive circuits 12, which can control the voltage across the six piezoelectric injection valves 20 connected to it according to the six pulse width modulation waveform signals output by the main control unit 11.

[0121] Specifically, such as Figure 5As shown, the piezoelectric injection valve drive circuit 12 is described using one example. The piezoelectric injection valve drive circuit 12 includes: a waveform signal conversion circuit 121 and a switching circuit 122, wherein:

[0122] The waveform signal conversion circuit 121 is connected to the waveform signal output interface 114 of the main control unit 11. It is used to receive the pulse width modulation waveform signal output by the main control unit 11 through the waveform signal output interface 114, convert it into a switching signal, and output it to the switching circuit 122.

[0123] The switching circuit 122 is connected to the waveform signal conversion circuit 121 and is used to control the voltage across the piezoelectric injection valve 20 (ACTUATOR_1+, ACTUATOR_1-) connected to it based on the switching signal output by the waveform signal conversion circuit 121.

[0124] For example, such as Figure 5 As shown, the waveform signal conversion circuit 121 includes a waveform signal conversion chip, which is connected to the waveform signal output interface 114 (LIN1 and HIN1) of the main control unit 11. The waveform signal conversion chip is used to receive the pulse width modulation waveform signal output by the main control unit 11 through the waveform signal output interface 114 (LIN1 and HIN1) and output the switching signals (HO and LO) of the switching circuit 122.

[0125] Specifically, the waveform signal conversion chip includes a waveform signal input interface (LIN and HIN) and a switch signal output interface (HO and LO). The waveform signal input interface of the waveform signal conversion chip is connected to the waveform signal output interface 114 (LIN1 and HIN1) of the main control unit 11, and is used to receive the pulse width modulation waveform signal output by the main control unit 11 through the waveform signal output interface 114 (LIN1 and HIN1). The switch signal output interface (HO and LO) is used to output the switch signals (HO and LO) of the switch circuit 122.

[0126] The switching circuit 122 includes a first NMOS transistor Q1 and a second NMOS transistor Q2. The gate of the first NMOS transistor Q1 is connected to one of the pins (HO) of the switching signal output interface of the waveform signal conversion chip, and receives the HO signal output by the waveform signal conversion chip through one of the pins (HO) of the switching signal output interface. The drain of the first NMOS transistor Q1 is connected to the reference voltage terminal (120V). The source of the first NMOS transistor Q1 is connected to the drain of the second NMOS transistor Q2. The gate of the second NMOS transistor Q2 is connected to the other pin (LO) of the switching signal output interface of the waveform signal conversion chip, and receives the LO signal output by the waveform signal conversion chip through the other pin (LO) of the switching signal output interface. The source of the second NMOS transistor Q2 is grounded. The connection between the source of the first NMOS transistor Q1 and the drain of the second NMOS transistor Q2 serves as the output terminal of the piezoelectric injection valve drive circuit, outputting a switching signal to the piezoelectric injection valve connected thereto.

[0127] It is understandable that the aforementioned NMOS transistor can also be replaced by other types of transistors such as PMOS transistors or IGBTs (Insulated-Gate Bipolar Transistors).

[0128] In one embodiment, such as Figure 1 and Figure 2 As shown, the multi-channel piezoelectric injection valve controller 10 also includes an RS485 communication unit 15, which is connected to the RS485 communication interface 115 of the main control unit 11 to enable the multi-channel piezoelectric injection valve controller 10 to communicate with the host computer 40 via RS485, thus facilitating automated control.

[0129] In one embodiment, such as Figure 1 and Figure 2 As shown, the multi-channel piezoelectric injection valve controller 10 also includes a power supply circuit 16, which is connected to each module unit (main control unit 11, several piezoelectric injection valve drive circuits 12, several IO input circuits 13, several output circuits 14, and RS485 communication unit 15) in the multi-channel piezoelectric injection valve controller 10. The power supply circuit 16 is used to step down the AC power supply and convert it into several DC currents to provide power to each module unit (main control unit 11, several piezoelectric injection valve drive circuits 12, several IO input circuits 13, several output circuits 14, and RS485 communication unit 15) in the multi-channel piezoelectric injection valve controller 10.

[0130] Specifically, the power supply circuit 16 steps down the AC 220V power supply to three DC power supplies: 24V, 120V, and 15V, which provide power to each module unit in the multi-channel piezoelectric injection valve controller 10.

[0131] like Figure 6 As shown, the power supply circuit 16 includes a step-down unit 161, several rectifier units 162, and several second filter units 163. The step-down unit 161 is connected to the several rectifier units 162, and the several rectifier units 162 and the several second filter units 163 are connected in a one-to-one correspondence.

[0132] The step-down unit 161 is used to step down the AC power supply into several AC currents, and each AC current power supply is input to a rectifier unit 162.

[0133] Specifically, the step-down unit 161 includes a transformer T1. The primary coil of transformer T1 receives the input of external AC power, and the secondary coil of transformer T1 includes multiple AC power output terminals. Each AC power output terminal outputs one AC power source, thus stepping down the AC power into several AC current sources. Each AC current source is input into a rectifier unit 162. For example, transformer T1 is used to step down a 220V AC power supply to three AC power sources: 24V, 120V, and 15V.

[0134] The rectifier unit 162 is used to convert one AC power input to the rectifier unit 162 into a DC power supply.

[0135] Specifically, the rectifier unit 162 includes a diode D2 and a second capacitor C2 connected in parallel with the diode D2. The positive terminal of the diode D2 is connected to one AC power output terminal of the secondary coil of the transformer T1, and the negative terminal of the diode D2 outputs one DC power, thereby enabling the diode D2 to convert one AC power output from the secondary coil of the transformer T1 into one DC power. The second capacitor C2 is used to filter one AC power output from the secondary coil of the transformer T1 to filter out interference signals in the AC power.

[0136] The second filter unit 163 is connected to the output terminal of the rectifier unit 162 and is used to filter the DC power supply output by the rectifier unit 162.

[0137] Specifically, the second filter unit 163 includes a third capacitor C3, which is used to filter the DC power supply output from the negative terminal of diode D2.

[0138] It should be noted that the above-described multi-channel piezoelectric injection valve control system embodiment and the multi-channel piezoelectric injection valve controller embodiment belong to the same concept. For details of its implementation process, please refer to the multi-channel piezoelectric injection valve controller embodiment. Furthermore, the technical features of the multi-channel piezoelectric injection valve controller embodiment are all applicable to the multi-channel piezoelectric injection valve control system embodiment, and will not be repeated here.

[0139] Based on the same concept, such as Figure 8As shown, this utility model also provides a DNA sequencing device 200, including the multi-channel piezoelectric jet valve control system 100 described in any of the above embodiments.

[0140] For example, DNA sequencing equipment 200 can be a DNA sequencer.

[0141] In this embodiment, a DNA sequencing device is provided, including a multi-channel piezoelectric jet valve control system. The control system comprises a multi-channel piezoelectric jet valve controller, several piezoelectric jet valves, a human-machine interface unit, and a host computer. The multi-channel piezoelectric jet valve controller includes a main control unit and several piezoelectric jet valve drive circuits. The main control unit is connected to the drive circuits and outputs multiple pulse width modulation (PWM) waveform signals to each drive circuit. Each drive circuit controls the voltage across its connected piezoelectric jet valve based on a corresponding PWM waveform signal output from the main control unit. This allows a single controller to simultaneously control multiple drive circuits, integrating multi-channel piezoelectric jet valve control into a single controller. This results in high integration, small footprint, and the ability to freely expand the number of channels according to user needs, making it easy to expand and more convenient for end users. Furthermore, the PWM controller parameters can be adjusted via the human-machine interface unit, facilitating operation. This solves the problem of low DNA sequencing efficiency caused by the piezoelectric jet valve controller's ability to control only a single piezoelectric jet valve in existing DNA sequencing devices with multi-channel piezoelectric jet valve control systems.

[0142] It should be noted that the above-described DNA sequencing device embodiment and the multi-channel piezoelectric jet valve control system embodiment belong to the same concept. For details of its implementation process, please refer to the multi-channel piezoelectric jet valve control system embodiment. Furthermore, the technical features of the multi-channel piezoelectric jet valve control system embodiment are all applicable to the DNA sequencing device embodiment, and will not be repeated here.

[0143] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above, which are not provided in detail for the sake of brevity; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-channel piezoelectric injection valve controller, characterized in that, Includes a main control unit and several piezoelectric injection valve drive circuits, wherein: The main control unit is connected to several piezoelectric injection valve drive circuits and is used to output multiple pulse width modulation waveform signals to several piezoelectric injection valve drive circuits. One pulse width modulation waveform signal corresponds to one piezoelectric injection valve drive circuit. The piezoelectric injection valve drive circuit is used to control the voltage across the piezoelectric injection valve connected to it according to a pulse width modulation waveform signal output by the main control unit.

2. The multi-channel piezoelectric injection valve controller according to claim 1, characterized in that, The main control unit includes a main control module, several IO input signal interfaces, several IO output signal interfaces, and several waveform signal output interfaces, wherein: The main control module is electrically connected to several of the IO input signal interfaces, several of the IO output signal interfaces and several of the waveform signal output interfaces, respectively, and is used to control several of the IO input signal interfaces, several of the IO output signal interfaces and several of the waveform signal output interfaces; The IO input signal interface is used to receive IO input signals from external devices to the main control unit; The IO output signal interface is used to output the IO output signal of the main control unit to an external IO load device; The waveform signal output interface is used to output the pulse width modulation waveform signal of the main control unit to the piezoelectric injection valve drive circuit.

3. The multi-channel piezoelectric injection valve controller according to claim 2, characterized in that, The multi-channel piezoelectric injection valve controller also includes an IO input circuit, which is connected to the main control unit and is used to output the IO input signal output by the host computer to the main control unit.

4. The multi-channel piezoelectric injection valve controller according to claim 3, characterized in that, The IO input circuit includes a photodiode, a first filter unit, and an optocoupler; The positive terminal of the photodiode is connected to the host computer, and the negative terminal of the photodiode is connected to the input terminal of the optocoupler. The photodiode is used to receive the IO input signal output by the host computer and output it to the optocoupler. The first filtering unit is connected to the negative terminal of the photodiode and is used to filter the output signal of the negative terminal of the photodiode. The input terminal of the optocoupler is connected to the negative terminal of the photodiode, and the output terminal of the optocoupler is connected to the IO input signal interface of the main control unit, so as to couple the IO input signal output by the host computer to the main control unit after passing through the photodiode.

5. The multi-channel piezoelectric injection valve controller according to claim 2, characterized in that, The multi-channel piezoelectric injection valve controller also includes an IO output circuit, which is connected to the main control unit and is used to output the IO output signal output by the main control unit to an external IO load device connected to it.

6. The multi-channel piezoelectric injection valve controller according to claim 5, characterized in that, The IO output circuit includes an IO output signal receiving unit and an IO output signal conversion unit; wherein: The IO output signal receiving unit is connected to the IO output signal interface of the main control unit and is used to receive the IO output signal output by the main control unit. The IO output signal conversion unit is connected to the IO output signal receiving unit and is used to convert the IO output signal received by the IO output signal receiving unit into a signal that matches the external IO load device connected to it, and output it to the external IO load device connected to it.

7. The multi-channel piezoelectric injection valve controller according to claim 2, characterized in that, The piezoelectric injection valve drive circuit includes a waveform signal conversion circuit and a switching circuit, wherein: The waveform signal conversion circuit is connected to the waveform signal output interface of the main control unit, and is used to receive the pulse width modulation waveform signal output by the main control unit through the waveform signal output interface, convert it into a switching signal, and output it to the switching circuit. The switching circuit is connected to the waveform signal conversion circuit and is used to control the voltage across the piezoelectric injection valve connected thereto based on the switching signal output by the waveform signal conversion circuit.

8. The multi-channel piezoelectric injection valve controller according to claim 2, characterized in that, The multi-channel piezoelectric injection valve controller also includes an RS485 communication unit, and the main control unit also includes an RS485 communication interface; the RS485 communication unit is connected to the RS485 communication interface to enable the multi-channel piezoelectric injection valve controller to communicate with the host computer via RS485.

9. A multi-channel piezoelectric injection valve control system, characterized in that, Includes the multi-channel piezoelectric injection valve controller and a plurality of piezoelectric injection valves as described in any one of claims 1 to 8; The multi-channel piezoelectric injection valve controller is connected to several of the piezoelectric injection valves and is used to output multiple pulse width modulation waveform signals to control the voltage at both ends of the corresponding connected piezoelectric injection valves.

10. A DNA sequencing device, characterized in that, The multi-channel piezoelectric injection valve control system as described in claim 9.

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