Device for driving micropump module

Abstract

The utility model discloses a device for driving a micropump module, and relates to the technical field of driving circuits. The device comprises a substrate (1), and an input interface (2), an output interface (3), a forward driving module, a forward discharge module, a reverse driving module, a reverse discharge module, a pressure and temperature detection module and a storage module which are fixedly connected to the substrate (1), the input interface (2) comprises a forward driving voltage control terminal, a reverse driving voltage control terminal, a clock communication terminal and a data communication terminal, and the output interface (3) comprises a forward driving voltage terminal and a reverse driving voltage terminal; through the input interface, the output interface, the forward driving module, the forward discharge module, the reverse driving module, the reverse discharge module, the pressure and temperature detection module, the storage module and the like which are fixedly connected to the substrate, the structure and layout are improved, wiring is simplified, the use efficiency is further improved, and piezoelectric ceramics on the micropump module can be driven.

Description

Technical Field

[0001] This utility model relates to the field of drive circuit technology, and in particular to a device for driving a micropump module. Background Technology

[0002] like Figure 6 As shown, in the existing solution, the micropump module includes a support structure 5 and a substrate 1, a piezoelectric ceramic 4, and a piezoelectric ceramic PZT adapter plate 8 fixedly connected to the support structure 5. An interface 9 for connecting to the control board is fixedly connected to the substrate 1, and an interface 10 for connecting to the drive board is fixedly connected to the piezoelectric ceramic PZT adapter plate 8. The substrate 1 and the micropump circuit on the substrate 1 form a micropump circuit board. In use, the control board, drive board, and piezoelectric ceramic are connected and assembled together to form a micropump module.

[0003] The micropump circuit on the micropump module has functions such as pressure detection, temperature detection, and parameter storage. It requires four terminals to connect to the control board: power terminal, ground terminal, I2C communication clock terminal, and I2C communication data terminal.

[0004] The piezoelectric ceramic 4 is connected to the drive board via the piezoelectric ceramic PZT adapter plate 8. The piezoelectric ceramic PZT adapter plate 8 has two terminals, namely the positive terminal and the negative terminal.

[0005] The piezoelectric ceramic drive circuit on the driver board has functions such as boost circuit and discharge circuit. It requires four input terminals, namely power supply, ground, forward drive and reverse drive; and two output terminals, namely positive and negative.

[0006] The disadvantages of the existing solution are as follows:

[0007] Users face difficulties using existing micropump circuit boards: they need to design additional drive units on the drive board or use piezoelectric ceramic drive circuits to connect with the piezoelectric ceramic PZT adapter board, and also need to design control units on the control board to connect with the micropump circuits on the existing micropump circuit board.

[0008] Low integration: There is no connection between the piezoelectric ceramic and the micropump circuit board. It needs to be connected to the customer-designed drive unit or piezoelectric ceramic drive circuit through an additional circuit board or wiring.

[0009] The technical problems to be solved in this application are:

[0010] The micropump module has a low level of integration: its piezoelectric ceramic requires a driving voltage of up to 85V, and users need to provide an additional piezoelectric ceramic driving circuit to drive the piezoelectric ceramic on the micropump module.

[0011] The micropump module has a high power supply voltage: the piezoelectric ceramic requires a driving voltage of up to 85V. The piezoelectric ceramic driving circuit is not integrated with the micropump circuit and the piezoelectric ceramic, resulting in complicated wiring and a large size. Utility Model Content

[0012] This invention provides a device for driving a micropump module, solving the technical problem of low efficiency caused by unreasonable structure of the micropump module.

[0013] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0014] A device for driving a micropump module includes a substrate and an input interface, an output interface, a forward drive module, a forward discharge module, a reverse drive module, a reverse discharge module, a pressure and temperature detection module, and a storage module fixedly connected to the substrate. The input interface includes a forward drive voltage control terminal, a reverse drive voltage control terminal, a clock communication terminal, and a data communication terminal. The output interface includes a forward drive voltage terminal and a reverse drive voltage terminal. The forward drive voltage control terminal is electrically connected to the control terminal of the forward drive module, and the reverse drive voltage control terminal is electrically connected to the control terminal of the reverse drive module. The clock communication terminal is electrically connected to the communication terminal of the pressure and temperature detection module, and the data communication terminal is electrically connected to the communication terminal of the storage module. The output terminal of the forward drive module is electrically connected to the output terminal of the forward discharge module, and the output terminal of the forward discharge module is electrically connected to the forward drive voltage terminal. The output terminal of the reverse drive module is electrically connected to the output terminal of the reverse discharge module, and the output terminal of the reverse discharge module is electrically connected to the reverse drive voltage terminal.

[0015] A further technical solution is that the input interface also includes a power terminal and a ground terminal. The power terminal is electrically connected to the power supply Vin of the forward drive module, the reverse drive module, the pressure and temperature detection module, and the storage module, respectively. The ground terminal is electrically connected to the ground of the forward drive module, the reverse drive module, the pressure and temperature detection module, and the storage module, respectively. The input interface is used to connect to the control circuit.

[0016] A further technical solution is that the forward drive module, the forward discharge module, the reverse drive module, and the reverse discharge module form a piezoelectric ceramic drive module, and the input interface and the output interface form an interface module.

[0017] A further technical solution includes a piezoelectric ceramic and a connecting wire, one end of which is connected to the piezoelectric ceramic and the other end of which is connected to the output interface.

[0018] A further technical solution includes a support structure, wherein the piezoelectric ceramic and the substrate are both fixedly connected to the support structure.

[0019] A further technical solution includes a control board and a connecting busbar. The control board includes a control base plate and a control circuit and a control interface fixedly connected to the control base plate. The control circuit is electrically connected to the control interface. One end of the connecting busbar is electrically connected to the control interface, and the other end of the connecting busbar is electrically connected to the input interface.

[0020] The beneficial effects of adopting the above technical solution are as follows:

[0021] A device for driving a micropump module includes a substrate and an input interface, an output interface, a forward drive module, a forward discharge module, a reverse drive module, a reverse discharge module, a pressure and temperature detection module, and a storage module fixedly connected to the substrate. The input interface includes a forward drive voltage control terminal, a reverse drive voltage control terminal, a clock communication terminal, and a data communication terminal. The output interface includes a forward drive voltage terminal and a reverse drive voltage terminal. The forward drive voltage control terminal is electrically connected to the control terminal of the forward drive module, and the reverse drive voltage control terminal is electrically connected to the control terminal of the reverse drive module. The clock communication terminal and the data communication terminal are electrically connected to the communication terminals of the pressure and temperature detection module and the storage module. The output terminal of the forward drive module is electrically connected to the output terminal of the forward discharge module, and the output terminal of the forward discharge module is electrically connected to the forward drive voltage terminal. The output terminal of the reverse drive module is electrically connected to the output terminal of the reverse discharge module, and the output terminal of the reverse discharge module is electrically connected to the reverse drive voltage terminal. By using input interfaces, output interfaces, forward drive modules, forward discharge modules, reverse drive modules, reverse discharge modules, pressure and temperature detection modules, and storage modules fixedly connected to the substrate, it improves the structure and layout, simplifies wiring, and thus enhances efficiency, enabling it to drive the piezoelectric ceramics on the micropump module.

[0022] See the detailed implementation section for further description. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the principle of this utility model;

[0024] Figure 2 This is a structural diagram of the application of this utility model;

[0025] Figure 3 This is a wiring diagram for the application of this utility model;

[0026] Figure 4 This is the circuit diagram of the forward drive module and the forward discharge module;

[0027] Figure 5 This is the circuit diagram of the reverse drive module and the reverse discharge module;

[0028] Figure 6 This is a structural diagram of the existing technical solution.

[0029] The components are: 1. substrate, 2. input interface, 3. output interface, 4. piezoelectric ceramic, 5. support structure, 6. connecting wire, 7. connecting cable strip, 8. piezoelectric ceramic PZT adapter board, 9. interface for connecting to the control board, and 10. interface for connecting to the driver board. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] like Figure 1 As shown, this utility model discloses a device for driving a micro-pump module, including an input interface 2, an output interface 3, a forward drive module, a forward discharge module, a reverse drive module, a reverse discharge module, a pressure and temperature detection module, and a storage module.

[0033] like Figure 2 As shown, input interface 2, output interface 3, forward drive module, forward discharge module, reverse drive module, reverse discharge module, pressure and temperature detection module, and storage module are fixedly connected to substrate 1. Substrate 1, input interface 2, output interface 3, forward drive module, forward discharge module, reverse drive module, reverse discharge module, pressure and temperature detection module, and storage module form a micro pump circuit board.

[0034] like Figure 1 As shown, input interface 2 includes six terminals: a power terminal, a ground terminal, a forward drive voltage control terminal, a reverse drive voltage control terminal, a clock communication terminal, and a data communication terminal. Output interface 3 includes two terminals: a forward drive voltage terminal and a reverse drive voltage terminal. Input interface 2 and output interface 3 form an interface module.

[0035] The power terminals of input interface 2 are electrically connected to the power supply Vin of the forward drive module, the reverse drive module, the pressure and temperature detection module, and the storage module, respectively. The ground terminals of input interface 2 are electrically connected to the ground of the forward drive module, the reverse drive module, the pressure and temperature detection module, and the storage module, respectively. The forward drive voltage control terminal of input interface 2 is electrically connected to the control terminal PWM1 of the forward drive module. The reverse drive voltage control terminal of input interface 2 is electrically connected to the control terminal PWM2 of the reverse drive module. The communication terminals of input interface 2 are electrically connected to the communication terminals of the pressure and temperature detection module and the storage module, respectively. The communication terminals are I2C communication terminals.

[0036] The output terminal V1 of the forward drive module is electrically connected to the output terminal V1 of the forward discharge module, and the output terminal V1 of the forward discharge module is electrically connected to the forward drive voltage terminal of the output interface 3.

[0037] The output terminal V2 of the reverse drive module is electrically connected to the output terminal V2 of the reverse discharge module, and the output terminal V2 of the reverse discharge module is electrically connected to the reverse drive voltage terminal of the output interface 3.

[0038] The forward drive module, forward discharge module, reverse drive module, and reverse discharge module together form a piezoelectric ceramic drive module.

[0039] When using:

[0040] like Figure 2 As shown, the piezoelectric ceramic 4 and the substrate 1 of the micropump circuit board are fixedly connected to the support structure 5. One end of the connecting line 6 is connected to the piezoelectric ceramic 4, and the other end of the connecting line 6 is connected to the output interface 3. The output interface 3 is a piezoelectric ceramic PZT adapter interface. The input interface 2 is an interface for connecting to the user control board. The control board has a control circuit. The control circuit is electrically connected to the input interface 2 by the connecting line 7.

[0041] The micropump module solution includes a support structure 5, a piezoelectric ceramic 4 fixedly connected to the support structure 5, a micropump circuit board, and a connecting line 6. The micropump circuit board includes a substrate 1 and an input interface 2, an output interface 3, a forward drive module, a forward discharge module, a reverse drive module, a reverse discharge module, a pressure and temperature detection module, and a storage module fixedly connected to the substrate 1.

[0042] like Figure 3As shown, the control board includes a control base plate and a control circuit and a control interface fixedly connected to the control base plate. The control circuit is electrically connected to the control interface. One end of the connecting cable 7 is electrically connected to the control interface, and the other end of the connecting cable 7 is electrically connected to the input interface 2. After the control circuit and the input interface 2 are electrically connected using the connecting cable 7, the power supply terminal of the control circuit is electrically connected to the power supply terminal of the input interface 2, the ground terminal of the control circuit is electrically connected to the ground terminal of the input interface 2, the forward drive voltage control terminal PWM1 of the control circuit is electrically connected to the forward drive voltage control terminal of the input interface 2, the reverse drive voltage control terminal PWM2 of the control circuit is electrically connected to the reverse drive voltage control terminal of the input interface 2, the clock communication terminal of the control circuit is electrically connected to the clock communication terminal of the input interface 2, and the data communication terminal of the control circuit is electrically connected to the data communication terminal of the input interface 2.

[0043] The power supply terminal of the control circuit is electrically connected to the power supply Vin of the forward drive module, the reverse drive module, the pressure and temperature detection module, and the storage module through the power supply terminal of input interface 2, respectively. The ground terminal of the control circuit is electrically connected to the ground of the forward drive module, the reverse drive module, the pressure and temperature detection module, and the storage module through the ground terminal of input interface 2, respectively. The forward drive voltage control terminal PWM1 of the control circuit is electrically connected to the control terminal PWM1 of the forward drive module through the forward drive voltage control terminal of input interface 2. The reverse drive voltage control terminal PWM2 of the control circuit is electrically connected to the control terminal PWM2 of the reverse drive module through the reverse drive voltage control terminal of input interface 2. The communication terminal of the control circuit is electrically connected to the communication terminal of the pressure and temperature detection module and the storage module through the communication terminal of input interface 2. The communication terminal is an I2C communication terminal.

[0044] Output interface 3 is connected to the piezoelectric ceramic PZT via connecting cable 6.

[0045] Further explanation is as follows:

[0046] Pressure and temperature detection and storage module:

[0047] Problem solved: The micropump circuit board was equipped with the functions of pressure detection, temperature detection, and parameter storage.

[0048] Results: This design fulfills the basic functions of a micropump circuit board.

[0049] Piezoelectric ceramic drive module:

[0050] Problem solved: The customer needed to design an additional piezoelectric ceramic drive module.

[0051] Results: The circuit board achieves a high degree of miniaturization and integration, simplifying the customer interface. Customers do not need to design drive circuits to drive the piezoelectric ceramic movement, reducing the difficulty of use for customers.

[0052] The circuit integrates a piezoelectric ceramic driver module, reducing the difficulty of use and design for customers.

[0053] Interface module:

[0054] The problem to be solved: The customer needed to design an additional drive unit to connect to the piezoelectric ceramic, and also needed to design a control unit to connect to the micropump circuit. There is no direct connection between the piezoelectric ceramic and the micropump circuit; therefore, an additional circuit board or wiring is required to connect them to the customer's circuit board.

[0055] Results: Customers only need to provide two PWM control signals, power, ground, and I2C control signals to drive the piezoelectric ceramic. The piezoelectric ceramic and the micropump circuit board are connected using lead wires (connector wire 6), reducing the number of interfaces for customer connection and simplifying user experience.

[0056] Furthermore:

[0057] For customer connection interfaces, FPC or half-hole connection methods are used to facilitate customer use.

[0058] For the PZT piezoelectric ceramic connection interface, a lead wire connection is used, which improves the reliability of the circuit.

[0059] Furthermore:

[0060] For piezoelectric ceramic connection interfaces, FPC or adapter plates can be used for connection.

[0061] Furthermore:

[0062] Other piezoelectric ceramic drive modules from existing technical solutions can also be used, which will not be elaborated further.

[0063] The beneficial technical effects are further explained below:

[0064] Pressure and temperature detection module and storage module:

[0065] The beneficial effects of the pressure and temperature detection module and the storage module: They solve the problems of pressure detection, temperature detection, and parameter storage required by the micropump circuit board.

[0066] Corresponding module: Piezoelectric ceramic drive module.

[0067] The benefits of piezoelectric ceramic drive modules include: a high degree of miniaturization and integration of the circuit board, simplified customer interface, elimination of the need to design drive circuits to drive the movement of piezoelectric ceramics, and reduced difficulty of use for customers.

[0068] Corresponding module: Interface module.

[0069] The benefits of the interface module: Customers only need to provide two PWM control signals, power supply, ground, and I2C control signals to achieve the desired effect of driving the piezoelectric ceramic. The connection between the piezoelectric ceramic and the micro-pump circuit board reduces the number of interfaces for customer connection, making it more convenient for customers to use.

[0070] The device is further described below:

[0071] like Figure 1 As shown, the micropump circuit includes a pressure and temperature detection module, a storage module, a piezoelectric ceramic drive module, and an interface module.

[0072] Pressure and temperature detection module and storage module:

[0073] Composition Description: The pressure and temperature detection module and the storage module consist of two parts, namely the pressure and temperature detection part and the storage part.

[0074] Part 1: Pressure and Temperature Detection: The pressure and temperature detection mainly consists of a pressure sensor with temperature detection capabilities, using I2C communication.

[0075] The second part is storage: The storage section mainly consists of EEPROM and uses I2C communication.

[0076] Piezoelectric ceramic drive module:

[0077] Composition Description: The piezoelectric ceramic drive module consists of four parts: a forward drive module, a reverse drive module, a forward voltage discharge circuit, and a reverse voltage discharge circuit.

[0078] Part 1: Forward Drive Module: The forward drive module mainly consists of 1 boost chip and peripheral resistor and capacitor components.

[0079] Part Two: Reverse Drive Module: The reverse drive module mainly consists of 1 boost chip and peripheral resistor and capacitor components.

[0080] The third part is the forward voltage discharge circuit, which is the forward discharge module. The forward voltage discharge circuit consists of 1 transistor, 1 diode, and 3 resistors.

[0081] Part Four: Negative Voltage Discharge Circuit: also known as Reverse Discharge Module. The reverse voltage discharge circuit consists of 1 transistor, 1 diode, and 3 resistors.

[0082] like Figure 4The diagram shows the circuit diagrams of the forward drive module and the forward discharge module in the piezoelectric ceramic drive module. The main components of the circuit include a first boost circuit, freewheeling diodes D1 and D2, boost inductor L1, voltage divider resistors R1, R2, R3, and R4, and output capacitor C1. The first boost circuit mainly uses the first boost chip U1, which is shown on the left side of the diagram. The chip model is TPS6139x.

[0083] like Figure 5 The diagram shows the circuit diagrams of the reverse drive module and the reverse discharge module in the piezoelectric ceramic drive module. The main components of the circuit include a second boost circuit, freewheeling diodes D3 and D4, boost inductor L2, voltage divider resistors R6, R7, R8, and R9, and output capacitor C2. The second boost circuit mainly uses the second boost chip U2; the chip on the left side of the diagram is the second boost chip U2, model TPS6139x.

[0084] Work process:

[0085] When PWM1 or PWM2 is in the ON state, the PWM controller inside the chip monitors the magnitude of the output forward voltage V1 and reverse voltage V2 through the ratio of feedback resistors R1, R2, R3, and R4, and compares it with the internal reference voltage. Based on the comparison result, the duty cycle of the PWM signal is adjusted, that is, the ratio of the on and off time of the switching transistor is controlled. When the output voltage V1 and V2 are lower than the set value, the duty cycle of the PWM signal is increased, making the on time of the built-in switching transistor longer, and more energy is stored in inductors L1 and L2, thereby increasing the output voltage; conversely, when the output voltage V1 and V2 are higher than the set value, the duty cycle is decreased, reducing the energy storage and energy transfer of inductors L1 and L2, causing the output voltage to drop, thereby achieving precise regulation and stable output voltage.

[0086] When PWM1 or PWM2 is off, the output voltage drops. However, due to the presence of capacitors C1 and C2 in the circuit, the output voltage cannot immediately drop to 0. Therefore, the residual current discharge circuit needs to work together. When V1 and V2 are powered on, the bases (b) of transistors Q1 and Q2 are at a high level, and transistors Q1 and Q2 are cut off. V1 and V2 charge C1 and C2 through D2. When V1 and V2 are powered off, the bases (b) of transistors Q1 and Q2 are pulled low by resistors R3 and R8. Due to their unidirectional conductivity, D3 and D4 are effectively disconnected, and the current flows from the collector to the emitter of Q1 and Q2, ultimately forming a loop.

[0087] The forward drive module, forward discharge module, reverse drive module, and reverse discharge module themselves, as well as the corresponding communication control methods, are existing technologies and will not be described in detail here.

[0088] Interface module:

[0089] Composition Description: The input interface consists of a power supply pin, a GND pin, an I2C communication pin, a forward drive voltage control pin (PWM1), and a reverse drive voltage control pin (PWM2). The output interface is a piezoelectric ceramic connector, consisting of a forward drive voltage pin and a reverse drive voltage pin.

[0090] Implementation: The input interface is implemented using an FPC flexible circuit board, the length of which can be adjusted according to customer requirements. The output interface is implemented using wires.

[0091] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for driving a micropump module, characterized in that: The application relates to a piezoelectric ceramic driving module, which comprises a substrate (1) and an input interface (2), an output interface (3), a forward driving module, a forward discharge module, a reverse driving module, a reverse discharge module, a pressure and temperature detection module and a storage module fixedly connected to the substrate (1), the input interface (2) comprises a forward driving voltage control terminal, a reverse driving voltage control terminal and a communication terminal, the output interface (3) comprises a forward driving voltage terminal and a reverse driving voltage terminal, the forward driving voltage control terminal is electrically connected to a control end of the forward driving module, the reverse driving voltage control terminal is electrically connected to a control end of the reverse driving module, the communication terminal is electrically connected to communication ends of the pressure and temperature detection module and the storage module at the same time, an output end of the forward driving module is electrically connected to an output end of the forward discharge module, the output end of the forward discharge module is electrically connected to the forward driving voltage terminal, an output end of the reverse driving module is electrically connected to an output end of the reverse discharge module, and the output end of the reverse discharge module is electrically connected to the reverse driving voltage terminal.

2. The device for driving a micropump module according to claim 1, wherein: The input interface (2) further comprises a power supply terminal and a ground terminal, the power supply terminal is electrically connected to power supply Vin of the forward driving module, the reverse driving module, the pressure and temperature detection module and the storage module respectively, and the ground terminal is electrically connected to ground of the forward driving module, the reverse driving module, the pressure and temperature detection module and the storage module respectively; the input interface (2) is used for being connected with a control circuit.

3. The device for driving a micropump module according to claim 1, wherein: The forward driving module, the forward discharge module, the reverse driving module and the reverse discharge module form a piezoelectric ceramic driving module, and the input interface (2) and the output interface (3) form an interface module.

4. The device for driving a micropump module according to claim 1, wherein: The piezoelectric ceramic (4) and a connecting line (6) are further included, one end of the connecting line (6) is connected to the piezoelectric ceramic (4), and the other end of the connecting line (6) is connected to the output interface (3).

5. The device for driving a micropump module according to claim 4, wherein: A support structure (5) is further included, and the piezoelectric ceramic (4) and the substrate (1) are fixedly connected to the support structure (5).

6. The device for driving a micropump module according to claim 1, wherein: A control board and a connecting line row (7) are further included, the control board comprises a control substrate and a control circuit and a control interface fixedly connected to the control substrate, the control circuit is electrically connected to the control interface, one end of the connecting line row (7) is electrically connected to the control interface, and the other end of the connecting line row (7) is electrically connected to the input interface (2).

Images