TWI436186B - Driving-controlling module and driving-controlling method thereof - Google Patents

Description

Drive control module and drive control method thereof

The invention relates to a driving control module and a driving control method thereof, in particular to a driving control module with precise flow control and a driving control method thereof.

Insulin is a kind of hormone secreted by the pancreas, which helps the body to smoothly enter the body's sugar into the body's cells to provide the energy needed by the body. Under normal circumstances, when the blood glucose level in the body rises, it will stimulate the pancreas to secrete insulin to lower the blood sugar concentration. Conversely, when the blood glucose concentration in the body decreases, insulin secretion is inhibited so that the blood glucose concentration of the human body is maintained within a normal range. If the body does not secrete insulin or insulin is insufficiently secreted, symptoms of diabetes can occur.

For patients with abnormal pancreatic function and unable to self-regulate insulin secretion with blood glucose concentration, it is often necessary to inject insulin to maintain normal blood glucose levels in the body. At present, in addition to manually supplementing the patient's insulin by means of needle injection, there is a drug dispensing device that can automatically inject insulin on the market.

Conventionally, the drug dispensing device capable of automatically injecting insulin mostly uses an electric motor as a source of driving force, and drives a driving motor to drive the electric motor by a driving control circuit, and the electric motor drives a reduction gear set to drive one. The finely scaled screw pushes a piston embedded in a reservoir in the form of a syringe to pressurize the piston into the reservoir to inject the medicament in the reservoir into the patient. However, such a drive structure composed of components such as an electric motor, a reduction gear set, and a screw not only has a relatively complicated drive control circuit, but also makes the delivery of the medicament unstable, so that the drive control circuit is driven. The accuracy of the drug delivery device to deliver the drug cannot be improved.

Therefore, how to provide a driving control module and a driving control method thereof, not only the circuit for driving the control module is relatively simple, but also the pharmaceutical dispensing device applying the driving control module has high output precision, Become one of the important topics.

In view of the above problems, an object of the present invention is to provide a drive control module having a higher output accuracy than a device for driving a control module, which is relatively simple, and which can be applied to the drug control device. And its drive control method.

To achieve the above object, a drive control module according to the present invention is used in conjunction with a piezoelectric micropump. The drive control module includes a control loop, a boost loop, a feedback loop, and a drive loop. The control loop outputs a boost signal and a control signal. The boost circuit is electrically connected to the control loop, and outputs a continuous signal according to the boost signal. The feedback loop is electrically connected to the control loop and the booster loop, and outputs a feedback signal according to the DC signal to input the control loop to stabilize the DC signal. The driving circuit is electrically connected to the control circuit, the boosting circuit and the piezoelectric micropump, and outputs a driving signal according to the direct current signal and the control signal, so that the piezoelectric micropump stably delivers a fluid.

In an embodiment of the invention, the boosting circuit outputs a DC signal according to a power signal and a boost signal.

In an embodiment of the present invention, the feedback signal is controlled by the control loop to output a boost signal, so that the voltage of the DC signal outputted by the boosting loop is stabilized, thereby stabilizing the voltage of the driving signal, so that the piezoelectric micropump is stably Deliver fluid.

In one embodiment of the invention, the drive circuit outputs at least three phase drive controls to control the piezoelectric micropump to deliver fluid.

In one embodiment of the invention, the frequency of the drive signal is variable.

In an embodiment of the invention, the control signal controls at least one of the switches of the drive circuit to be turned on or off.

In an embodiment of the present invention, the driving circuit has a first switch, a second switch, a third switch, and a fourth switch, and the DC signal is respectively input to the first end of the first switch and the second switch, The second ends of the switches and the second switches are electrically connected to a first electrical input end and a second electrical input end of the piezoelectric micropumped actuating element.

In one embodiment of the present invention, the first ends of the third switch and the fourth switch are electrically connected to the first end of the first switch and the second switch, respectively, and the first electric of the piezoelectric micro-pumped actuating element The second input and the second end of the fourth switch are respectively grounded.

In an embodiment of the invention, the control signal simultaneously turns on the first switch and the fourth switch, so that the direct current signal is input to the first electrical input end of the actuating element via the first switch, and the second electrical property of the actuating element The input is grounded via a fourth switch.

In an embodiment of the invention, the control signal simultaneously turns on the second switch and the third switch, so that the DC signal is input to the second electrical input end of the actuating element via the second switch, and the first electrical component of the actuating element The input is grounded via a third switch.

In an embodiment of the invention, the feedback loop has two resistors that divide the DC signal to generate a feedback signal.

To achieve the above object, a drive control method according to the present invention is for controlling a piezoelectric micropump to stably deliver a fluid. The driving control method includes the following steps: outputting a continuous stream signal according to a power signal and a boost signal; generating a feedback signal according to the DC signal; adjusting and stabilizing the DC signal according to the feedback signal; and relying on the stable DC signal and a control signal A drive signal is output to enable the piezoelectric micropump to stably deliver fluid.

In an embodiment of the invention, the feedback signal is a partial voltage of the DC signal.

In one embodiment of the invention, the drive control method outputs at least three phase drive controls to control the piezoelectric micropump to deliver fluid.

In an embodiment of the invention, in the step of outputting the driving signal, the control signal controls the turning on and off of the at least one switch to output the driving signal.

In an embodiment of the invention, the control signal controls the driving signals to be opposite in phase to the input electrodes of the piezoelectric micropump at different times.

According to the above description, a driving control module and a driving control method thereof according to the present invention output an accurate and stable DC signal and a driving signal to control the piezoelectric micro-pump operation in cooperation with the driving control module, so that the pressure is made. The amount of extraction and compression of the electric micropump is stable and predictable. Thereby, the driving control module can obtain the flow of the actual output fluid through the calculation of the sampling and compression times of the piezoelectric micro-pump chamber, and then stop driving the control module when the user preset output is reached. Output. Therefore, the medicine dispensing device to which the driving control module of the present invention is applied has high output precision. In addition, the driving control module and the driving control method thereof of the present invention are combined with the piezoelectric micropump to replace the structure of the conventional electric motor, the reduction gear set, and the screw, and thus, the control is conventionally controlled. In comparison to the circuit, the circuit of the drive control module of the present invention has the advantage of being relatively simple.

Hereinafter, a drive control module and a drive control method thereof according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein like elements will be described with the same reference numerals.

Please refer to FIG. 1 , which is a functional block diagram of a driving control module 1 according to a preferred embodiment of the present invention. The drive control module 1 of the present invention is used in conjunction with a piezoelectric micropump 2 to enable the piezoelectric micropump 2 to stably deliver a fluid 3. Among them, the piezoelectric micropump 2 system can be used for the transport of a small amount (ml or microliter) and a fluid 3 requiring precise flow control. In addition, the fluid 3 may be a liquid or a gas, and is not limited to which liquid or gas, as long as the liquid or gas to be transported does not contain a chemical reaction or an aggressive component which may be caused by the piezoelectric micropump 2 itself. Just fine. In addition, the drive control module 1 can be applied to the fluid output control of a fluid dispensing device, and the fluid dispensing device can be a drug delivery device, such as an insulin pump, a micro syringe (such as an injection of anesthetic), or It is used in the mixing and preparation of trace fluids. Here, it is not limited to which fluid dispensing device the drive control module 1 is applied to.

The drive control module 1 includes a control circuit 11, a boost circuit 12, a feedback circuit 13 and a drive circuit 14.

First, in order to clearly explain the operation mode of the drive control module 1, the structure of the piezoelectric micropump 2 to be used in conjunction with the drive control module 1 will be described below with reference to the related drawings.

2A to 2C, wherein FIG. 2A is a perspective cross-sectional view of the piezoelectric micropump 2, and FIGS. 2B and 2C are plan cross-sectional views of the piezoelectric micropump 2, respectively.

The piezoelectric micropump 2 has a body 21 and a plurality of actuating elements 22, and the actuating element 22 is disposed on the body 21. The body 21 has a plurality of chambers R, which are respectively disposed corresponding to the actuating elements 22. In this embodiment, three sets of chambers R are taken as an example, but it is not limited thereto. The actuating elements 22 are correspondingly disposed above the three sets of chambers R.

The material of the body 21 of the piezoelectric micropump 2 may comprise plastic, and the plastic is, for example, poly-methylmethacrylate (PMMA). In addition, the actuating element 22 comprises a piezoelectric material, for example a lead zirconate Titanate (PZT). In particular, the piezoelectric micropump 2 of Figures 2A to 2C adopts a valveless design, thereby overcoming the risk that the valved micropumped valve is prone to fatigue and cannot be blocked or broken, or The particles contained in the transported fluid catch the valve and impede the disadvantages of fluid transport.

Furthermore, as shown in FIG. 2B, in the present embodiment, the adjacent chambers R in the body 21 are connected by the first-class track D. In addition, the body has an inlet IN and an outlet OUT, and the inlet IN and the outlet OUT communicate with the chamber R through a series of passages D. Among them, the fluid 3 can be sucked by the inlet IN, flows through the three groups of chambers R of the body 21 via the passage D, and then discharged through the outlet OUT. Here, the three sets of chambers R of the body 21 are designed to be cylindrical to conform to the low efficiency loss of fluid dynamics.

Referring to FIG. 2A and FIG. 2C, the piezoelectric micropump 2 further has a uniform moving diaphragm 23, and the actuating diaphragm 23 covers the top of the chambers R, and the actuating elements 22 are disposed on Actuated above the diaphragm 23. In other words, the actuation diaphragm 23 is located between the actuation element 22 and the chamber R. In addition, the actuating member 22 is tightly bonded to the actuating diaphragm 23 by a conductive and viscous material such as a conductive silver paste. Therefore, as shown in Fig. 2C, when the actuating member 22 is deformed, the actuating diaphragm 23 can be deformed. Wherein, the actuating diaphragm 23 is a thin glass with a high Young's modulus, which can fully accept the inverse piezoelectric effect of the actuating element 22, and can generate sufficient thrust to deform the corresponding chamber R, thereby lifting the pressure. Back pressure of electric micro pump 2 .

In addition, referring to FIG. 1 and FIG. 2C, the drive control module 1 is electrically connected to the piezoelectric micropump 2, and outputs a stable one drive signal DS to enable at least one of the actuating elements 22. The deformation is generated, and the chamber R of the body 21 can be deformed to make the fluid 3 stably output through the piezoelectric micropump 2. In this case, the drive control module 1 can output a stable driving signal DS to deform the actuating element 22, and then the actuating diaphragm 23 can be deformed to make the chamber R corresponding to the actuating element 22 The volume changes. In particular, the stable drive signal DS refers to a stable voltage. In addition, the frequency of the driving signal DS of the present embodiment is variable, so that the optimum driving frequency can also be set for the characteristics of different conveying fluids 3 (for example, different viscosities).

When the actuating element 22 is deformed by the voltage loading of the driving signal DS, and the actuating diaphragm 23 is interlocked and bent upward, the volume of the chamber R also increases, so that the fluid 3 can be drawn into the chamber R. Here, it is defined as the capture phase (shown as the chamber R on the left side of FIG. 2C); in addition, when the actuating element 22 is reversely loaded by the voltage of the drive signal DS, the deformation is caused, and the actuating diaphragm 23 is interlocked. When the curve is bent downward, the volume of the chamber R is also reduced, so that the fluid 3 can be squeezed out from the chamber R, which is defined as a compression phase (shown as the chamber R in the middle and the right side of Fig. 2C). ).

Hereinafter, please refer to FIG. 3A to further illustrate the control mode and circuit of the drive control module 1 of the present invention.

The control circuit 11 outputs a boost signal BS and a control signal CS. The control loop 11 can include a Micro Controller Unit (MCU). In addition, the user can input the control parameters in advance and store them in the memory inside the drive control module 1, and the control circuit 11 can control and drive the piezoelectric micropump 2 output fluid 3 according to the control parameters input by the user.

Referring to FIG. 1 and FIG. 3A simultaneously, the boosting circuit 12 is electrically connected to the control circuit 11. The booster circuit 12 outputs a DC signal DC according to the boost signal BS. The booster circuit 12 outputs a DC signal DC according to a power signal ES and a boost signal BS. The boost circuit 12 can boost the power signal ES of DC3V to DC5V to a voltage of DC60V or higher, and the DC signal DC can be a voltage signal of DC60V or more. The booster circuit 12 of the present invention is an interleaved boost converter (Interleaved Boost Converter), and the interleaved boost converter has high voltage gain, low current chopping, fast transient response, and small Passive component size and other advantages.

In addition, referring to FIG. 1 and FIG. 3B simultaneously, the feedback circuit 13 is electrically connected to the control circuit 11 and the boosting circuit 12. The feedback loop 13 outputs a feedback signal FS according to the DC signal DC to be input to the control loop 11 to control the voltage of the DC signal DC outputted by the booster loop 12 to be stabilized, thereby stabilizing the voltage of the drive signal DS. As shown in FIG. 3B, the feedback loop 13 has two resistors R1 and R2. The resistors R1 and R2 divide the DC signal DC to generate a feedback signal FS. In other words, the feedback signal FS is equal to (R2/(R1+R2)) x DC signal DC.

The feedback signal FS is controlled by the control loop 11 to output the boost signal BS to stabilize the voltage of the DC signal DC output from the booster circuit 12. The feedback loop 13 fine-tunes the boosting circuit 12 according to the voltage value of the DC signal DC detected each time to achieve a stable DC signal DC output, thereby stabilizing the output voltage of the driving signal DS, thus enabling voltage The extraction and compression stages of the electric micropump 2 are stable and the output flow of the fluid 3 is also stabilized.

Referring to FIG. 1 and FIG. 3C simultaneously, the drive circuit 14 is electrically connected to the control circuit 11, the booster circuit 12, and the piezoelectric micropump 2. The driving circuit 14 outputs the driving signal DS according to the DC signal DC and the control signal CS output from the control circuit 11 so that the piezoelectric micropump 2 can stably transport the fluid 3.

As shown in FIG. 3C, the driving circuit 14 has a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4, and the DC signal DC is input to the first switch S1 and the second switch S2, respectively. The first ends S11, S21. In addition, the second ends S12 and S22 of the first switch S1 and the second switch S2 are electrically connected to a first electrical input end 221 and a second electrical input of the actuating element 22 of the piezoelectric micropump 2, respectively. End 222. In other words, the second ends S12 and S22 of the first switch S1 and the second switch S2 are electrically connected to the two electrode input ends of the actuating element 22 of the piezoelectric micropump 2, respectively.

In addition, the first ends S31 and S41 of the third switch S3 and the fourth switch S4 are electrically connected to the second ends S12 and S22 of the first switch S1 and the second switch S2 and the actuating elements of the piezoelectric micropump 2, respectively. The first electrical input end 221 and the second electrical input end 222 of FIG. Further, the second ends S32 and S42 of the third switch S3 and the fourth switch S4 are grounded, respectively. The first switch S1, the second switch S2, the third switch S3, and the fourth switch S4 may be an optical coupling switch.

The control signal CS outputted by the control circuit 11 can control at least one of the first switch S1, the second switch S2, the third switch S3, and the fourth switch S4 to be turned on or off. The control signal CS turns on the first switch S1 and the fourth switch S4 at the same time, so that the DC signal DC is input to the first electrical input end 221 of the actuating element 22 via the first switch S1, and the second of the actuating element 22 The electrical input 222 can be grounded via the fourth switch S4. In other words, the control signal CS can simultaneously turn on the first switch S1 and the fourth switch S4 to load the DC signal DC on the two-electrode input end of the actuating element 22 (the DC signal DC at this time is the driving signal of the actuating element 22) The DS, referred to herein as the first drive signal DS1), deforms the actuating element 22 such that the actuating diaphragm 23 is deformed to cause a change in the volume of the chamber R disposed corresponding to the actuating element 22.

In addition, the control circuit 11 simultaneously turns on the second switch S2 and the third switch S3, so that the DC signal DC is input to the second electrical input end 222 of the actuating element 22 via the second switch S2, and the first of the actuating element 22 The electrical input 221 can be grounded via the third switch S3. In other words, the control signal CS can simultaneously turn on the second switch S2 and the third switch S3 to load the DC signal DC to the two-electrode input end of the actuating element 22 (the DC signal DC at this time is the driving signal DS of the actuating element 22) This is referred to as the second drive signal DS2) to deform the actuating element 22, and the actuating diaphragm 23 can be deformed to cause a change in the volume of the chamber R provided corresponding to the actuating element 22.

It is particularly noted that the phase of the first driving signal DS1 and the second driving signal DS2 at this time is opposite. In addition, if the first driving signal DS1 is in the capturing phase, the second driving signal DS2 is the compression phase. On the other hand, if the first driving signal DS1 is in the compression phase, the second driving signal DS2 is in the capturing phase.

Therefore, the control signal CS can control the switch of the drive circuit 14 to be turned on, so that the DC signal DC is input to the two electrode input terminals of the actuating element 22 of the piezoelectric micropump 2, and the drive signal DS of each chamber R in the capture phase is made. The voltage phase is opposite to the voltage phase of the drive signal DS during the compression phase. Therefore, the control signal CS can control the direct current signal DC to act on the conduction direction of the electrodes at both ends of the piezoelectric micropump 2. Therefore, the driving effect of the driving signal DS on the piezoelectric micropump 2 is equivalent to the AC driving mode of the voltage of the DC signal DC twice.

Hereinafter, please refer to FIG. 4A to FIG. 4D to illustrate the driving mode in which the driving control module 1 of the present invention drives the piezoelectric micropump 2 to transport the fluid 3. 4A to 4D are schematic diagrams showing an operation of driving the piezoelectric micropump 2 by the drive control module 1.

The drive control module 1 can output at least three phases of drive control to control the piezoelectric micropump 2 actuation. In the present embodiment, the driving control module 1 outputs a four-phase driving signal DS to control the piezoelectric micropump 2 to transport the fluid 3 as an example.

It should be noted that, in the present embodiment, the four-phase control means that the state of the three sets of chambers R completes a complete cycle of cycles every four independent phases. The length of the period depends on the polarity of the applied electrode to change the frequency, and the amount of displacement of the actuating element 22 depends on the voltage strength of the applied electrode.

In addition, in order to facilitate the description of the operation mode of the piezoelectric micropump 2, the drawing phase of the upward deformation deformation of the actuating element 22 is represented by the numeral 1, and the compression phase of the downward deformation compression is represented by the numeral 0, and the actuating element 22 The stage of no action is indicated by ─.

Therefore, as shown in FIG. 4A to FIG. 4D, the four-phase drive control of the output of the drive control module 1 is: [1──], [01-], [-01], and [──0]. When the three sets of chambers R are combined with the specific extraction and compression actions as described above, the fluid 3 in the piezoelectric micropump 2 is caused to generate a driving force in a fixed direction, and the fluid 3 will be imported from the piezoelectric micropump 2 IN enters and is outputted by the output of the piezoelectric micropump 2 OUT. Since the action of the piezoelectric micropump 2 is similar to the peristaltic mode of the caterpillar, the piezoelectric micropump 2 can also be called a peristaltic piezoelectric micropump.

In addition, please refer to FIG. 5A to FIG. 5D to illustrate another operation mode in which the driving control module 1 of the present invention drives the piezoelectric micropump 2. 5A to 5D are schematic diagrams showing another operation of driving the piezoelectric micropump 2 by the drive control module 1.

As shown in FIG. 5A to FIG. 5D, the four-phase drive control of the output of the drive control module 1 is: [100], [110], [011], and [001].

Therefore, the drive control module 1 of the present invention can cause the piezoelectric micropump 2 to have the ability to push the fluid 3 in the chamber R to cause a change in the flow rate of the fluid 3 by the above-described driving control mode of at least three phases. It is to be noted that the above two driving control modes are merely examples, and are not intended to limit the present invention, as long as the driving control module 1 can output at least three phases of driving control to control the piezoelectric micropump 2 actuation, and The fluid 3 is sucked from the inlet IN of the piezoelectric micropump 2 and sent out through the output port OUT of the piezoelectric micropump 2.

According to the above, the driving control module 1 of the present invention can output an accurate and stable driving signal DS, so that the extraction and compression amount of each chamber R of the piezoelectric micropump 2 used in the application is stable and can be stabilized. It is estimated that the drive control module 1 can obtain the flow rate of the actual output fluid 3 through the calculation of the extraction and compression times of the chamber R, and then stop the drive control module 1 when the user preset output is reached. The output of the drive signal DS. Therefore, the medicine dispensing device to which the drive control module 1 of the present invention is applied can have higher output accuracy. In addition, since the driving device of the driving control module 1 is a piezoelectric micropump 2, the driving control mode of the present invention can be compared with a driving structure composed of a conventional electric motor, a reduction gear set, and a screw. Group 1 has the advantage that the control circuit is relatively simple.

Hereinafter, please refer to FIG. 1 and FIG. 6 simultaneously to explain a drive control method of the present invention. 6 is a flow chart of a driving control method according to a preferred embodiment of the present invention.

The drive control method of the present invention is for controlling a piezoelectric micropump 2 to stably deliver a fluid 3, wherein the drive control method includes steps S01 to S04.

First, the step S01 is: outputting the DC signal DC according to a power signal ES and a boost signal BS. Here, the power supply signal ES is boosted by the booster circuit 12 to output a DC signal DC.

Furthermore, step S02 is: generating a feedback signal FS according to the DC signal DC. Here, the DC signal DC is input to the feedback loop 13 to generate the feedback signal FS. The feedback signal FS is a voltage division signal of the DC signal DC.

Next, step S03 is: adjusting and stabilizing the DC signal DC according to the feedback signal FS. In this case, the boost signal BS is output according to the feedback signal FS, so that the voltage of the DC signal DC outputted by the booster circuit 12 is stabilized. The feedback loop 13 performs fine-tuning control on the boosting loop 12 according to the voltage value of the DC signal DC detected each time to achieve a stable DC signal DC output. The stable DC signal DC refers to the voltage of the stabilized DC signal DC.

Finally, step S04 is: outputting a driving signal DS according to the stable DC signal DC and a control signal CS, so that the piezoelectric micropump 2 can stably transport the fluid 3. The driving control method of the present invention can output a driving signal DS of at least three phases to control the piezoelectric micropump 2 to transport the fluid 3.

In the step of outputting the driving signal DS, the control signal CS controls the on and off of at least one switch to output the driving signal DS. In addition, the frequency of the driving signal is variable, and the control signal CS controls the driving signal DS to be opposite to the voltage phase of the input electrode of the piezoelectric micropump 2 at different times.

In addition, other technical features of the driving control method of the present invention are clearly illustrated in the embodiment of the above-described driving control module 1, and are not described herein again.

In summary, a driving control module and a driving control method thereof according to the present invention output an accurate and stable DC signal and a driving signal to control a piezoelectric micro-pump operation in cooperation with a driving control module, so that the pressure is made. The amount of extraction and compression of the electric micropump is stable and predictable. Thereby, the driving control module can obtain the flow of the actual output fluid through the calculation of the sampling and compression times of the piezoelectric micro-pump chamber, and then stop driving the control module when the user preset output is reached. Output. Therefore, the medicine dispensing device to which the driving control module of the present invention is applied has high output precision. In addition, the driving control module and the driving control method thereof of the present invention are combined with the piezoelectric micropump to replace the structure of the conventional electric motor, the reduction gear set, and the screw, and thus, the control is conventionally controlled. In comparison to the circuit, the circuit of the drive control module of the present invention has the advantage of being relatively simple.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1. . . Drive control module

11. . . Control loop

12. . . Boost loop

13. . . Feedback loop

14. . . Drive loop

2. . . Piezoelectric micropump

twenty one. . . Ontology

twenty two. . . Actuating element

221, 222. . . Electrical input

twenty three. . . Actuated diaphragm

3. . . fluid

BS. . . Boost signal

CS. . . Control signal

D. . . Runner

DC. . . DC signal

DS, DS1, DS2. . . Drive signal

ES. . . Power signal

FS. . . Feedback signal

IN. . . import

OUT. . . Export

R. . . Chamber

R1, R2. . . resistance

S1 ~ S4. . . switch

S01～S04. . . step

S11, S12, S21, S22, S31, S32, S41, S42. . . End point

1 is a functional block diagram of a drive control module according to a preferred embodiment of the present invention;

2A is a perspective cross-sectional view of a piezoelectric micropump;

2B and 2C are plan sectional views of the piezoelectric micropump, respectively;

3A is a schematic circuit diagram of a booster circuit of the present invention;

3B is a schematic circuit diagram of a feedback loop of the present invention;

3C is a schematic circuit diagram of a driving circuit of the present invention;

4A to 4D are schematic views showing an operation of driving a piezoelectric micropump by a driving control module of the present invention;

5A to 5D are schematic views showing another operation of the driving control module for driving the piezoelectric micropump according to the present invention;

FIG. 6 is a flow chart of a driving control method according to a preferred embodiment of the present invention.

1. . . Drive control module

11. . . Control loop

12. . . Boost loop

13. . . Feedback loop

14. . . Drive loop

2. . . Piezoelectric micropump

3. . . fluid

BS. . . Boost signal

CS. . . Control signal

DC. . . DC signal

DS. . . Drive signal

ES. . . Power signal

FS. . . Feedback signal

Claims (18)

A driving control module is matched with a piezoelectric micro pump, the driving control module includes: a control loop for outputting a boost signal and a control signal; and a boost circuit connected to the control loop Connected and output a continuous signal according to the boost signal; a feedback loop is electrically connected to the control loop and the boost loop, and outputs a feedback signal according to the DC signal to input the control loop to The DC signal that controls the output of the boosting circuit is stable; and a driving circuit is electrically connected to the control circuit, the boosting circuit and the piezoelectric micropump, and outputs a driving according to the DC signal and the control signal a signal for stably transmitting the fluid to the piezoelectric micropump, wherein the driving control module calculates the actual output of the fluid according to the calculation of the number of times of capturing and compressing the chamber of the piezoelectric micropump And then stop the output of the drive signal. The driving control module of claim 1, wherein the boosting circuit outputs the DC signal according to a power signal and the boosting signal. The drive control module of claim 1, wherein the boost circuit is an interleaved boost converter. The driving control module of claim 1, wherein the feedback signal controls the control circuit to output the boosting signal to enable the rising The voltage of the DC signal outputted by the voltage loop is stabilized, thereby stabilizing the voltage of the driving signal, so that the piezoelectric micropump stably delivers the fluid. The drive control module of claim 1, wherein the drive circuit outputs at least three phases of drive control to control the piezoelectric micropump to deliver the fluid. The drive control module of claim 1, wherein the frequency of the drive signal is variable. The driving control module of claim 1, wherein the control signal controls at least one switch of the driving circuit to be turned on or off. The driving control module of claim 1, wherein the driving circuit has a first switch, a second switch, a third switch and a fourth switch, wherein the DC signal is respectively input to the first switch And the first end of the second switch, the second end of the first switch and the second switch are respectively electrically connected to a first electrical input end and a second end of the piezoelectric micropumped actuating element Electrical input. The driving control module of claim 8, wherein the first end of the third switch and the fourth switch are electrically connected to the second end of the first switch and the second switch, respectively, and the pressure The first electrical input end and the second electrical input end of the actuating component of the electric micropump, the third end of the third switch and the fourth switch are respectively grounded. The driving control module of claim 8, wherein the control signal simultaneously turns on the first switch and the fourth switch to make the straight The flow signal is input to the first electrical input end of the actuating element via the first switch, and the second electrical input end of the actuating element is grounded via the fourth switch. The driving control module of claim 8, wherein the control signal simultaneously turns on the second switch and the third switch, so that the DC signal is input to the second power of the actuating element via the second switch. a sexual input, and the first electrical input of the actuating element is grounded via the third switch. The driving control module of claim 1, wherein the feedback loop has two resistors, and the resistors divide the DC signal to generate the feedback signal. A driving control method for controlling a piezoelectric micropump to stably deliver a fluid, the driving control method comprising the steps of: outputting a direct current signal according to a power signal and a boosting signal; generating a feedback according to the direct current signal And modulating and stabilizing the DC signal according to the feedback signal; and outputting a driving signal according to the stable DC signal and a control signal, so that the piezoelectric micropump stably delivers the fluid, wherein The sampling and compression times of the piezoelectric micro-pump chamber are calculated to obtain the actual flow rate of the fluid, thereby stopping the output of the driving signal. The driving control method of claim 13, wherein the feedback signal is a partial voltage of the DC signal. The driving control method according to claim 13 of the patent application, wherein The drive control method outputs at least three phases of drive control to control the piezoelectric micropump to deliver the fluid. The driving control method of claim 13, wherein in the step of outputting the driving signal, the control signal controls on and off of at least one switch to output the driving signal. The driving control method of claim 13, wherein the frequency of the driving signal is variable. The driving control method according to claim 13, wherein the control signal controls the voltage phase of the driving signal applied to the input electrode of the piezoelectric micropump at different times to be opposite.