Piezoelectric load swing amplitude control device, swing amplitude control method and air conditioning equipment

Abstract

The invention discloses a swing control device, a swing control method, an operation control device, air conditioning equipment and a computer readable storage medium of a piezoelectric load, the swing control device comprises a driving module, a swing detection module and a control module, the driving module is connected with the piezoelectric load and is used for providing alternating current driving voltage for the piezoelectric load; the swing detection module comprises an infrared transmitting module and an infrared receiving module which are oppositely arranged, the piezoelectric load comprises a plurality of piezoelectric patches, each piezoelectric patch comprises a fixed part and a swingable part, the distance from a connecting line of the infrared transmitting module and the infrared receiving module to the fixed part is a first distance, and the first distance is smaller than the length of the swingable part; the control module is electrically connected with the driving module and the swing detection module and used for adjusting the alternating current driving voltage output by the driving module according to the output signal of the swing detection module. The swing amplitude of the piezoelectric plate in the piezoelectric load can be kept at the required degree, and large fluctuation cannot be generated.

Description

Technical Field

[0001] The present invention relates to the field of piezoelectric drive control technology, and in particular to a swing amplitude control device, a swing amplitude control method, an operation control device, an air conditioning device and a computer-readable storage medium for a piezoelectric load. Background Art

[0002] Piezoelectric drive technology is mainly based on the inverse piezoelectric effect of piezoelectric ceramic materials. It generates mechanical vibration by applying an electric field in the dielectric direction of the piezoelectric ceramic element. It has the advantages of simple structure, high controllability and strong adaptability.

[0003] At present, piezoelectric fans are gradually used in indoor units of air conditioners. They are installed at the air outlet and used in conjunction with the indoor fan to adjust the wind field effect of the air outlet. However, the swing amplitude of the piezoelectric fan is easily affected by factors such as wind speed, the weight of the piezoelectric chip itself, indoor temperature, and indoor humidity. Therefore, the open constant voltage and constant current drive cannot achieve constant swing amplitude control, which easily leads to large swing amplitude fluctuations and affects comfort. Summary of the invention

[0004] The object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a swing control device, a swing control method, an operation control device, an air conditioning device and a computer-readable storage medium for a piezoelectric load, which can keep the swing amplitude of the piezoelectric sheet in the piezoelectric load at a desired level without causing large fluctuations.

[0005] In a first aspect, an embodiment of the present invention provides a swing amplitude control device for a piezoelectric load, comprising a driving module, a swing amplitude detection module and a control module, wherein: The driving module is connected to the piezoelectric load and is used to provide an AC driving voltage to the piezoelectric load; The swing amplitude detection module includes an infrared transmitting module and an infrared receiving module that are arranged opposite to each other, the piezoelectric load includes a plurality of piezoelectric sheets, the piezoelectric sheets include a fixed part and a swingable part, the distance from the connection line between the infrared transmitting module and the infrared receiving module to the fixed part is a first distance, and the first distance is less than the length of the swingable part; The control module is electrically connected to the driving module and the swing detection module respectively, and is used to adjust the AC driving voltage output by the driving module according to the output signal of the swing detection module.

[0006] The swing amplitude control device of the piezoelectric load provided in accordance with the embodiment of the present invention has at least the following beneficial effects: the swing amplitude of the piezoelectric sheet in the piezoelectric load is detected by setting a swing amplitude detection module, wherein the swing amplitude detection module includes an infrared transmitting module and an infrared receiving module, and the first distance between the connection line of the infrared transmitting module and the infrared receiving module and the fixed part of the piezoelectric sheet is less than the length of the swingable part of the piezoelectric sheet, so that when the piezoelectric sheet does not swing or the swing amplitude is small, the piezoelectric sheet will block the infrared signal emitted by the infrared transmitting module, and the infrared receiving module will not receive the infrared signal, and when the swing amplitude of the piezoelectric sheet is large enough, the piezoelectric sheet will not block the infrared signal emitted by the infrared transmitting module, and the infrared receiving module can receive the infrared signal, and finally the control module obtains the output signal of the swing amplitude detection module, and determines whether the swing amplitude of the piezoelectric sheet in the piezoelectric load is large enough according to the output signal of the swing amplitude detection module, and then adjusts the AC driving voltage output by the driving module, so that the swing amplitude of the piezoelectric sheet in the piezoelectric load is maintained at the required level without generating large fluctuations.

[0007] According to the swing control device provided in some embodiments of the present invention, the driving module includes a boost unit and an amplification coupling unit connected in sequence, the boost unit is used to boost the input voltage to obtain a DC power supply voltage, and the amplification coupling unit is used to amplify and couple the driving PWM signal according to the DC power supply voltage to obtain the AC driving voltage.

[0008] According to the swing control device provided by some embodiments of the present invention, the control module adjusts the magnitude of the DC supply voltage by adjusting the duty cycle of the boost PWM signal output to the boost unit.

[0009] According to the swing amplitude control device provided by some embodiments of the present invention, when the infrared receiving module does not receive the infrared signal transmitted by the infrared transmitting module, the control module increases the duty cycle of the boost PWM signal.

[0010] According to the swing control device provided by some embodiments of the present invention, when the infrared receiving module receives the infrared signal emitted by the infrared sending module and the duration is greater than a preset time, the control module reduces the duty cycle of the boost PWM signal.

[0011] According to the swing control device provided by some embodiments of the present invention, when the infrared receiving module receives the infrared signal emitted by the infrared sending module and the duration is less than or equal to a preset duration, the control module maintains the duty cycle of the boost PWM signal.

[0012] According to some embodiments of the present invention, the swing amplitude control device further includes a displacement module for driving the swing amplitude detection module to move, and the control module is further used to: receiving a gear position signal of the piezoelectric load; The displacement module is controlled to drive the swing amplitude detection module to move to a position corresponding to the gear position signal to adjust the first distance.

[0013] In a second aspect, an embodiment of the present invention provides a method for controlling the swing amplitude of a piezoelectric load, which is applied to the swing amplitude control device described in the embodiment of the first aspect above, and the method includes: receiving a gear position signal of the piezoelectric load; Controlling the displacement module to drive the swing amplitude detection module to move to a position corresponding to the gear position signal to adjust the first distance; The AC driving voltage output by the driving module is adjusted according to the output signal of the swing detection module.

[0014] According to the swing control method provided by some embodiments of the present invention, when the infrared receiving module does not receive the infrared signal transmitted by the infrared transmitting module, the duty cycle of the boost PWM signal output to the driving module is increased.

[0015] According to the swing control method provided by some embodiments of the present invention, when the infrared receiving module receives the infrared signal emitted by the infrared sending module and the duration is greater than a preset duration, the duty cycle of the boost PWM signal output to the driving module is reduced.

[0016] According to the swing control method provided by some embodiments of the present invention, when the infrared receiving module receives the infrared signal emitted by the infrared sending module and the duration is less than or equal to a preset duration, the duty cycle of the boost PWM signal output to the driving module is maintained.

[0017] In a third aspect, an embodiment of the present invention provides an operation control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the swing control method of the piezoelectric load as described in the embodiment of the second aspect above.

[0018] In a fourth aspect, an embodiment of the present invention provides an air conditioning device, comprising an operation control device as described in the embodiment of the third aspect above.

[0019] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the swing control method of a piezoelectric load as described in the embodiment of the second aspect above.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments; Figure 1 is an overall schematic diagram of a swing amplitude control device for a piezoelectric load provided in an embodiment of the present invention; Figure 2 It is a schematic diagram of the connection between the swing detection module and the control module of the swing control device of the piezoelectric load provided in an embodiment of the present invention; Figure 3 is a circuit schematic diagram of a swing amplitude control device for a piezoelectric load provided in an embodiment of the present invention; Figure 4 is a flow chart of a method for controlling the swing amplitude of a piezoelectric load provided in an embodiment of the present invention; Figure 5 is a flow chart of a method for controlling the swing amplitude of a piezoelectric load provided by a detailed embodiment of the present invention; Figure 6 It is a structural schematic diagram of the operation control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the description of the embodiments of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, "above", "below", "within", etc. are understood to include the number itself, "at least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] It should be noted that the terms such as setting, installing, and connecting in the embodiments of the present invention should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or mutual communication; it can be directly connected or indirectly connected through an intermediate medium.

[0026] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Piezoelectric drive technology is mainly based on the inverse piezoelectric effect of piezoelectric ceramic materials. It generates mechanical vibration by applying an electric field in the dielectric direction of the piezoelectric ceramic element. It has the advantages of simple structure, high controllability, and strong adaptability. At present, piezoelectric fans are gradually used in indoor units of air conditioners. They are set at the air outlet and used in conjunction with the indoor fan to adjust the wind field effect of the air outlet. However, the swing amplitude of the piezoelectric fan is easily affected by factors such as wind speed, the weight of the piezoelectric film itself, indoor temperature, and indoor humidity. Therefore, the open constant voltage and constant current drive cannot achieve constant swing amplitude control, which can easily lead to large swing amplitude fluctuations and affect comfort.

[0028] Based on this, the embodiments of the present invention provide a swing control device, a swing control method, an operation control device, an air conditioning device and a computer-readable storage medium for a piezoelectric load, which can maintain the swing amplitude of the piezoelectric sheet in the piezoelectric load at a desired level without causing large fluctuations.

[0029] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0030] Reference Figures 1 to 3 The first aspect of the present invention provides a swing amplitude control device for a piezoelectric load, comprising a driving module 100, a swing amplitude detection module 200 and a control module 300, wherein: like Figure 1 As shown, the driving module 100 is connected to the piezoelectric load 400 and is used to provide an AC driving voltage to the piezoelectric load 400; like Figure 2 As shown, the swing detection module 200 includes an infrared sending module 210 and an infrared receiving module 220 which are arranged opposite to each other; like Figure 2 and Figure 3 As shown, the piezoelectric load 400 includes a plurality of piezoelectric sheets 410, and the piezoelectric sheets 410 include a fixed portion and a swingable portion. The distance from the connection line of the infrared transmitting module 210 and the infrared receiving module 220 to the fixed portion is a first distance Lx, and the first distance Lx is less than the length of the swingable portion. The control module 300 is electrically connected to the driving module 100 and the swing detection module 200 , respectively, and is used to adjust the AC driving voltage output by the driving module 100 according to the output signal of the swing detection module 200 .

[0031] According to the swing amplitude control device of the piezoelectric load provided by the embodiment of the present invention, the swing amplitude detection module 200 is set to detect the swing amplitude of the piezoelectric sheet 410 in the piezoelectric load 400, wherein the swing amplitude detection module 200 includes an infrared transmitting module 210 and an infrared receiving module 220, and the first distance Lx between the connection line of the infrared transmitting module 210 and the infrared receiving module 220 and the fixed part of the piezoelectric sheet 410 is less than the length of the swingable part of the piezoelectric sheet 410, so that when the piezoelectric sheet 410 does not swing or the swing amplitude is small, the piezoelectric sheet 410 will block the infrared signal emitted by the infrared transmitting module 210, and the infrared receiving module 220 will block the infrared signal emitted by the infrared transmitting module 210. Block 220 will not receive the infrared signal, and when the swing amplitude of the piezoelectric sheet 410 is large enough, the piezoelectric sheet 410 will not block the infrared signal emitted by the infrared sending module 210, and the infrared receiving module 220 can receive the infrared signal. Finally, the control module 300 obtains the output signal of the swing amplitude detection module 200, and determines whether the swing amplitude of the piezoelectric sheet 410 in the piezoelectric load 400 is large enough according to the output signal of the swing amplitude detection module 200, and then adjusts the AC driving voltage output by the driving module 100, so that the swing amplitude of the piezoelectric sheet 410 in the piezoelectric load 400 is maintained at the required level without large fluctuations.

[0032] Reference Figure 1 and Figure 3 In the swing control device provided in some embodiments of the present invention, the driving module 100 includes a boost unit 110 and an amplification coupling unit 120 connected in sequence, the boost unit 110 is used to boost the input voltage U1 to obtain a DC power supply voltage VIN, and the amplification coupling unit 120 is used to amplify and couple the driving PWM signal according to the DC power supply voltage VIN to obtain an AC driving voltage.

[0033] Specifically, the boost unit 110 includes a boost circuit part and a voltage regulating circuit part, wherein the boost circuit part is composed of a first capacitor C1, a first resistor R1, a boost driving chip IC2, a first inductor L1, a first switch tube Q1, a second capacitor C2, a second resistor R2 and a diode D1; the voltage regulating circuit part is composed of a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, an operational amplifier IC3, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5; the positive electrode of the input voltage U1 is connected to one end of the first capacitor C1, the first inductor L1 and the positive electrode of the input voltage U1. and the power supply terminal of the boost driver chip IC2, the negative electrode of the input voltage U1 is grounded and respectively connected to the other end of the first capacitor C1, one end of the first resistor R1 and the ground terminal of the boost driver chip IC2, the other end of the first resistor R1 is connected to the boost driver chip IC2; the other end of the first inductor L1 is respectively connected to a switch pin of the first switch tube Q1 and the positive electrode of the diode D1; the other switch pin of the first switch tube Q1 is connected to one end of the second resistor R2 and connected to the boost driver chip IC2, the other end of the second resistor R2 is grounded; one end of the second capacitor C2 The cathode of the diode D1 is connected to one end of the third resistor R3 and one end of the fifth capacitor C5; the other end of the fifth capacitor C5 is grounded; the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and one end of the fifth resistor R5 and connected to the boost driver chip IC2; the other end of the fourth resistor R4 is grounded; the other end of the fifth resistor R5 is connected to the output end and one of the input ends of the operational amplifier IC3 respectively; the other end of the input end of the operational amplifier IC3 is connected to one end and one end of the sixth resistor R6 One end of the fourth capacitor C4 and the other end of the fourth capacitor C4 are grounded, and the other end of the sixth resistor R6 is connected to an output end of the control module 300 to obtain the boost PWM signal output by the control module 300; the positive electrode of the power supply end of the operational amplifier IC3 is also connected to the positive electrode of the input voltage U1 and one end of the third capacitor C3 respectively, the other end of the third capacitor C3 is grounded, and the negative electrode of the power supply end of the operational amplifier IC3 is grounded; the connection point between the negative electrode of the diode D1 and the fifth capacitor C5 is used as the output end of the boost unit 110 to provide a DC power supply voltage VIN to the amplification coupling unit 120. It should be noted that the voltage regulation circuit part obtains the boost PWM signal from the control module 300, passes through the RC integration circuit composed of the sixth resistor R6 and the fourth capacitor C4, and then sends it to the impedance isolation and voltage follower amplifier circuit composed of the operational amplifier IC3 and the third capacitor C3, and then sends it to the current regulation circuit composed of the third resistor R3, the fourth resistor R4, and the fifth resistor R5, and finally transmits it to the boost driver chip IC2, so as to realize the stepless voltage regulation of the boost unit 110.

[0034] The amplification coupling unit 120 includes a driving IC1, a driving IC2, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a fifth switch tube Q5, a second inductor L2, a third inductor L3, a sixth capacitor C6 and a seventh capacitor C7; the connection point between the cathode of the diode D1 and the fifth capacitor C5, that is, the output end of the boost unit 110 is connected to a switch pin of the second switch tube Q2 and a switch pin of the fourth switch tube Q4, the other switch pin of the second switch tube Q2 is connected to a switch pin of the third switch tube Q3, the other switch pin of the third switch tube Q3 is grounded, the other switch pin of the fourth switch tube Q4 is connected to a switch pin of the fifth switch tube Q5, and the other switch pin of the fifth switch tube Q5 is grounded; the connection point between the second switch tube Q2 and the third switch tube Q3 is connected to one end of the second inductor L2, the other end of the second inductor L2 is connected to one end of the sixth capacitor C6, and the other end of the sixth capacitor C6 is grounded; the connection point between the fourth switch tube Q4 and the fifth switch tube Q5 is connected to one end of the third inductor L3, and the other end of the third inductor L3 is connected to the seventh capacitor C7 The other end of the seventh capacitor C7 is grounded; the connection point of the second inductor L2 and the sixth capacitor C6 is connected to the positive electrode of the piezoelectric sheet 410 in the piezoelectric load 400 as the positive electrode of the output end of the amplifying coupling unit 120, so as to provide a voltage L-OUT to the piezoelectric sheet 410; the connection point of the third inductor L3 and the seventh capacitor C7 is connected to the negative electrode of the piezoelectric sheet 410 in the piezoelectric load 400 as the negative electrode of the output end of the amplifying coupling unit 120, so as to provide a voltage N-OUT to the piezoelectric sheet 410; the input end of the driver IC1 is connected to the output end of the control module 300. The two output ends of the driver IC1 are connected to the control pins of the second switch tube Q2 and the third switch tube Q3 to control the on and off of the second switch tube Q2 and the third switch tube Q3 according to the driving PWM signal 1; the input end of the driver IC2 is connected to the output end of the control module 300 to obtain the driving PWM signal 2, and the two output ends of the driver IC2 are connected to the control pins of the fourth switch tube Q4 and the fifth switch tube Q5 to control the on and off of the fourth switch tube Q4 and the fifth switch tube Q5 according to the driving PWM signal 2.

[0035] Reference Figure 1 and Figure 3 In the swing control device provided in some embodiments of the present invention, the control module 300 adjusts the magnitude of the DC supply voltage VIN by adjusting the duty cycle of the boost PWM signal output to the boost unit 110 .

[0036] In this embodiment, the control module 300 adjusts the duty cycle of the output boost PWM signal, which will change the signal size input to the operational amplifier IC3 by the RC integration circuit composed of the sixth resistor R6 and the fourth capacitor C4, thereby changing the size of the voltage V2 output by the operational amplifier IC3, and then changing the signal size output by the voltage regulation circuit part to the boost driver chip IC2 in the boost circuit part. Finally, the boost driver chip IC2 changes the on-off control of the first switch tube Q1, thereby changing the size of the DC power supply voltage VIN output by the boost unit 110.

[0037] Next, combine Figure 2 and Figure 3 , the detection principle of the swing detection module 200 is introduced. Under the action of the voltage L-OUT and the voltage N-OUT provided by the amplifying coupling unit 120, the piezoelectric sheet 410 in the piezoelectric load 400 generates resonance in its internal structural material, thereby generating swing, such as Figure 2As shown in the figure, the dotted line a and the dotted line b are respectively the maximum swing positions of the piezoelectric sheet 410 under the current AC driving voltage, and the dotted line c is the swing contour line of the end of the swingable part of the piezoelectric sheet 410. At this time, if the connection line between the infrared transmitting module 210 and the infrared receiving module 220 just passes through the end of the dotted line a and the end of the dotted line b, when the piezoelectric sheet 410 swings between the dotted line a and the dotted line b, the infrared signal emitted by the infrared transmitting module 210 will be blocked by the piezoelectric sheet 410, and the infrared receiving module 220 cannot receive the infrared signal; if the connection line between the infrared transmitting module 210 and the infrared receiving module 220 is located on the right side of the connection line between the end of the dotted line a and the end of the dotted line b, that is, the connection line between the infrared transmitting module 210 and the infrared receiving module 220 is located on the side of the connection line between the end of the dotted line a and the end of the dotted line b away from the fixed part of the piezoelectric sheet 410, the infrared receiving module 220 is also unable to receive the infrared signal If the line connecting the infrared sending module 210 and the infrared receiving module 220 is located on the left side of the line connecting the end of the dotted line a and the end of the dotted line b, that is, the line connecting the infrared sending module 210 and the infrared receiving module 220 is located on the side of the line connecting the end of the dotted line a and the end of the dotted line b close to the fixed part of the piezoelectric sheet 410, when the piezoelectric sheet 410 swings to the point where its end crosses the line connecting the infrared sending module 210 and the infrared receiving module 220 from the right side, the infrared signal emitted by the infrared sending module 210 is no longer blocked by the piezoelectric sheet 410, and the infrared receiving module 220 can receive the infrared signal. At this time, the infrared receiving module 220 can intermittently receive the infrared signal emitted by the infrared sending module 210 during the swinging process. Therefore, it can be understood that after the positions of the infrared sending module 210 and the infrared receiving module 220 are determined, the swing amplitude of the piezoelectric sheet 410 can be determined by whether the infrared receiving module 220 receives the infrared signal emitted by the infrared sending module 210; in addition, it can also be understood that when the infrared receiving module 220 can intermittently receive the infrared signal emitted by the infrared sending module 210, the swing amplitude of the piezoelectric sheet 410 can be further determined based on the duration of the infrared receiving module 220 receiving the infrared signal emitted by the infrared sending module 210.

[0038] In the swing amplitude control device provided by some embodiments of the present invention, when the infrared receiving module 220 does not receive the infrared signal transmitted by the infrared transmitting module 210, the control module 300 increases the duty cycle of the boost PWM signal.

[0039] In this embodiment, the infrared receiving module 220 does not receive the infrared signal emitted by the infrared sending module 210, indicating that under the current AC driving voltage, the end of the swingable part of the piezoelectric sheet 410 still does not cross the connection line between the infrared sending module 210 and the infrared receiving module 220 at the maximum swing position. Therefore, it can be judged that the swing amplitude of the piezoelectric sheet 410 is small. At this time, the control module 300 increases the duty cycle of the boost PWM signal, so that the DC power supply voltage VIN provided by the boost unit 110 increases, and then increases the AC driving voltage provided by the amplification coupling unit 120 to increase the swing amplitude of the piezoelectric sheet 410.

[0040] In the swing control device provided by some embodiments of the present invention, when the infrared receiving module 220 receives the infrared signal emitted by the infrared sending module 210 and the duration is greater than a preset time, the control module 300 reduces the duty cycle of the boost PWM signal.

[0041] In this embodiment, the infrared receiving module 220 receives the infrared signal emitted by the infrared sending module 210, and the duration is greater than the preset time length, indicating that under the current AC driving voltage, the end of the swingable part of the piezoelectric sheet 410 can cross the connection line between the infrared sending module 210 and the infrared receiving module 220 at the maximum swing position, and the crossing amplitude is also large. Therefore, it can be judged that the swing amplitude of the piezoelectric sheet 410 is large. At this time, the control module 300 reduces the duty cycle of the boost PWM signal, so that the DC power supply voltage VIN provided by the boost unit 110 decreases, thereby reducing the AC driving voltage provided by the amplification coupling unit 120 to reduce the swing amplitude of the piezoelectric sheet 410.

[0042] In the swing control device provided by some embodiments of the present invention, when the infrared receiving module 220 receives the infrared signal transmitted by the infrared transmitting module 210 and the duration is less than or equal to the preset duration, the control module 300 maintains the duty cycle of the boost PWM signal.

[0043] In this embodiment, the infrared receiving module 220 receives the infrared signal emitted by the infrared sending module 210, and the duration is less than or equal to the preset duration, indicating that under the current AC driving voltage, the end of the swingable part of the piezoelectric sheet 410 can cross the connection line between the infrared sending module 210 and the infrared receiving module 220 at the maximum swing position, and the crossing amplitude is relatively appropriate, and there is no excessive crossing of the connection line between the infrared sending module 210 and the infrared receiving module 220. Therefore, it can be judged that the swing amplitude of the piezoelectric sheet 410 is moderate. At this time, the control module 300 maintains the duty cycle of the boost PWM signal to maintain the current swing amplitude of the piezoelectric sheet 410.

[0044] In the swing amplitude control device provided in some embodiments of the present invention, a displacement module for driving the swing amplitude detection module 200 to move is also included, and the control module 300 is further used for: Receiving a gear position signal of the piezoelectric load 400; The control displacement module drives the swing amplitude detection module 200 to move to a position corresponding to the gear position signal to adjust the first distance Lx.

[0045] Since the swing amplitude required for different gears is different, in this embodiment, a displacement module is set to drive the swing amplitude detection module 200 to move, and the control module 300 controls the adjustment displacement module to adjust the first distance Lx according to the gear signal of the piezoelectric load 400 received, so that the swing amplitude detection module 200 moves to a position corresponding to the gear signal, thereby adjusting the swing amplitude required by the piezoelectric load 400. It should be noted that the displacement module can be implemented in a variety of ways, such as using a cylinder or a stepper motor, and can also be implemented with the aid of mechanical components such as guide rails, screws, gears, etc. There are many ways to implement it in the prior art, and this application will not elaborate on this.

[0046] Reference Figure 4 The second aspect of the present invention provides a method for controlling the swing amplitude of a piezoelectric load 400, which is applied to the swing amplitude control device of the first aspect of the present invention. The method includes steps S410 to S430: Step S410: receiving a gear position signal of the piezoelectric load 400; Step S420: controlling the displacement module to drive the swing amplitude detection module 200 to move to a position corresponding to the gear position signal to adjust the first distance Lx; Step S430 : adjusting the AC driving voltage output by the driving module 100 according to the output signal of the swing detection module 200 .

[0047] In the swing amplitude control method provided in the embodiment of the present invention, a displacement module is set to drive the swing amplitude detection module 200 to move, and the displacement module is controlled to adjust the first distance Lx according to the gear signal of the received piezoelectric load 400, so that the swing amplitude detection module 200 moves to a position corresponding to the gear signal, thereby realizing the adjustment of the swing amplitude required by the piezoelectric load 400; the swing amplitude control device detects the swing amplitude of the piezoelectric sheet 410 in the piezoelectric load 400 by setting the swing amplitude detection module 200, wherein the swing amplitude detection module 200 includes an infrared sending module 210 and an infrared receiving module 220, and the first distance Lx from the connection line between the infrared sending module 210 and the infrared receiving module 220 to the fixed part of the piezoelectric sheet 410 is less than the length of the swingable part of the piezoelectric sheet 410, When the piezoelectric sheet 410 does not swing or the swing amplitude is small, the piezoelectric sheet 410 will block the infrared signal emitted by the infrared transmitting module 210, and the infrared receiving module 220 will not receive the infrared signal. When the swing amplitude of the piezoelectric sheet 410 is large enough, the piezoelectric sheet 410 will not block the infrared signal emitted by the infrared transmitting module 210, and the infrared receiving module 220 can receive the infrared signal. Finally, by obtaining the output signal of the swing amplitude detection module 200 and judging whether the swing amplitude of the piezoelectric sheet 410 in the piezoelectric load 400 is large enough according to the output signal of the swing amplitude detection module 200, the AC driving voltage output by the driving module 100 is adjusted, so that the swing amplitude of the piezoelectric sheet 410 in the piezoelectric load 400 is maintained at the required level without generating large fluctuations.

[0048] In the swing control method provided by some embodiments of the present invention, when the infrared receiving module 220 does not receive the infrared signal transmitted by the infrared transmitting module 210, the duty cycle of the boost PWM signal output to the driving module 100 is increased.

[0049] In this embodiment, the infrared receiving module 220 does not receive the infrared signal emitted by the infrared sending module 210, indicating that under the current AC driving voltage, the end of the swingable part of the piezoelectric sheet 410 still does not cross the connection line between the infrared sending module 210 and the infrared receiving module 220 at the maximum swing position. Therefore, it can be judged that the swing amplitude of the piezoelectric sheet 410 is small. At this time, the control module 300 increases the duty cycle of the boost PWM signal, so that the DC power supply voltage VIN provided by the boost unit 110 increases, and then increases the AC driving voltage provided by the amplification coupling unit 120 to increase the swing amplitude of the piezoelectric sheet 410.

[0050] In the swing control method provided by some embodiments of the present invention, when the infrared receiving module 220 receives the infrared signal emitted by the infrared sending module 210 and the duration is greater than a preset time, the duty cycle of the boost PWM signal output to the driving module 100 is reduced.

[0051] In this embodiment, the infrared receiving module 220 receives the infrared signal emitted by the infrared sending module 210, and the duration is greater than the preset time length, indicating that under the current AC driving voltage, the end of the swingable part of the piezoelectric sheet 410 can cross the connection line between the infrared sending module 210 and the infrared receiving module 220 at the maximum swing position, and the crossing amplitude is also large. Therefore, it can be judged that the swing amplitude of the piezoelectric sheet 410 is large. At this time, the control module 300 reduces the duty cycle of the boost PWM signal, so that the DC power supply voltage VIN provided by the boost unit 110 decreases, thereby reducing the AC driving voltage provided by the amplification coupling unit 120 to reduce the swing amplitude of the piezoelectric sheet 410.

[0052] In the swing control method provided in some embodiments of the present invention, when the infrared receiving module 220 receives the infrared signal emitted by the infrared sending module 210 and the duration is less than or equal to the preset duration, the duty cycle of the boost PWM signal output to the driving module 100 is maintained.

[0053] In this embodiment, the infrared receiving module 220 receives the infrared signal emitted by the infrared sending module 210, and the duration is less than or equal to the preset duration, indicating that under the current AC driving voltage, the end of the swingable part of the piezoelectric sheet 410 can cross the connection line between the infrared sending module 210 and the infrared receiving module 220 at the maximum swing position, and the crossing amplitude is relatively appropriate, and there is no excessive crossing of the connection line between the infrared sending module 210 and the infrared receiving module 220. Therefore, it can be judged that the swing amplitude of the piezoelectric sheet 410 is moderate. At this time, the control module 300 maintains the duty cycle of the boost PWM signal to maintain the current swing amplitude of the piezoelectric sheet 410.

[0054] The following describes the swing control method provided by the present invention through a specific embodiment. Figure 5 The swing amplitude control method includes steps S501 to S510: Step S501: outputting a boost PWM signal corresponding to the duty cycle according to the gear position signal; jumping to step S502; Step S502: the boost unit 110 outputs the corresponding DC supply voltage VIN according to the boost PWM signal; jump to step S503; Step S503: amplify the output voltage L-OUT and the voltage N-OUT of the coupling unit 120, and apply them to the piezoelectric sheet 410; jump to step S504; Step S504: the piezoelectric sheet 410 starts to swing, and the swing amplitude detection module 200 detects the swing amplitude of the piezoelectric sheet 410; jump to step S505, S507 or S509; Step S505: No infrared signal is received and the swing amplitude is too small; jump to step S506; Step S506: increase the duty cycle of the boost PWM signal; jump to step S502; Step S507: receiving an infrared signal, and the duration is greater than the preset duration, and the swing amplitude is large; jump to step S508; Step S508: reduce the duty cycle of the boost PWM signal; jump to step S502; Step S509: receiving an infrared signal, and the duration is less than or equal to the preset duration, and the swing amplitude is moderate; jump to step S510; Step S510: maintain the duty cycle of the boost PWM signal; jump to step S502.

[0055] In this embodiment, it is determined whether the swing amplitude of the piezoelectric film 410 in the piezoelectric load 400 is large enough based on the output signal of the swing detection module 200, and then the AC driving voltage output by the driving module 100 is adjusted so that the swing amplitude of the piezoelectric film 410 in the piezoelectric load 400 is maintained at the desired level without causing large fluctuations.

[0056] Reference Figure 6 The third aspect of the present invention provides an operation control device 600, including a memory 610, a processor 620, and a computer program stored in the memory 610 and executable on the processor 620. The processor 620 executes the program to implement the swing control method of the piezoelectric load 400 of the second aspect of the present invention, for example, to execute Figure 4 Steps S410 to S430 of the method, or executing Figure 5 The method comprises steps S501 to S510.

[0057] In addition, a fourth aspect of the present invention provides an air conditioning device, comprising the operation control device 600 of the third aspect of the present invention.

[0058] In addition, a fifth aspect of the present invention provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the swing control method of the piezoelectric load 400 of the second aspect of the present invention, such as executing Figure 4 Steps S410 to S430 of the method, or executing Figure 5 The method comprises steps S501 to S510.

[0059] It will be appreciated by those skilled in the art that all or some of the steps and systems in the method disclosed above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium or a non-transitory medium and a communication medium or a temporary medium. As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk DVD or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A swing amplitude control device for a piezoelectric load, characterized in that: include: A driving module, connected to the piezoelectric load, and configured to provide an AC driving voltage to the piezoelectric load; The swing detection module comprises an infrared transmitting module and an infrared receiving module which are arranged opposite to each other, the piezoelectric load comprises a plurality of piezoelectric sheets, the piezoelectric sheets comprise a fixed part and a swingable part, the distance from the connection line between the infrared transmitting module and the infrared receiving module to the fixed part is a first distance, and the first distance is less than the length of the swingable part; The control module is electrically connected to the driving module and the swing detection module respectively, and is used to adjust the AC driving voltage output by the driving module according to the output signal of the swing detection module.

2. The swing amplitude control device according to claim 1, characterized in that: The driving module includes a boost unit and an amplification coupling unit connected in sequence, the boost unit is used to boost the input voltage to obtain a DC power supply voltage, and the amplification coupling unit is used to amplify and couple the driving PWM signal according to the DC power supply voltage to obtain the AC driving voltage.

3. The swing amplitude control device according to claim 2, characterized in that: The control module adjusts the magnitude of the DC supply voltage by adjusting the duty cycle of the boost PWM signal output to the boost unit.

4. The swing amplitude control device according to claim 3, characterized in that: When the infrared receiving module does not receive the infrared signal transmitted by the infrared transmitting module, the control module increases the duty cycle of the boost PWM signal.

5. The swing amplitude control device according to claim 3, characterized in that: When the infrared receiving module receives the infrared signal transmitted by the infrared transmitting module and the duration is greater than a preset time, the control module reduces the duty cycle of the boost PWM signal.

6. The swing amplitude control device according to claim 3, characterized in that: When the infrared receiving module receives the infrared signal transmitted by the infrared transmitting module and the duration is less than or equal to the preset duration, the control module maintains the duty cycle of the boost PWM signal.

7. The swing amplitude control device according to claim 1, characterized in that: It also includes a displacement module for driving the swing amplitude detection module to move, and the control module is also used for: receiving a gear position signal of the piezoelectric load; The displacement module is controlled to drive the swing amplitude detection module to move to a position corresponding to the gear position signal to adjust the first distance.

8. A method for controlling the swing amplitude of a piezoelectric load, characterized in that: Applied to the swing amplitude control device according to claim 7, the method comprises: receiving a gear position signal of the piezoelectric load; Controlling the displacement module to drive the swing amplitude detection module to move to a position corresponding to the gear position signal to adjust the first distance; The AC driving voltage output by the driving module is adjusted according to the output signal of the swing detection module.

9. The swing amplitude control method according to claim 8, characterized in that: When the infrared receiving module does not receive the infrared signal transmitted by the infrared transmitting module, the duty cycle of the boost PWM signal output to the driving module is increased.

10. The swing amplitude control method according to claim 8, characterized in that: When the infrared receiving module receives the infrared signal emitted by the infrared sending module and the duration is greater than a preset time, the duty cycle of the boost PWM signal output to the driving module is reduced.

11. The swing amplitude control method according to claim 8, characterized in that: When the infrared receiving module receives the infrared signal transmitted by the infrared transmitting module and the duration is less than or equal to the preset duration, the duty cycle of the boost PWM signal output to the driving module is maintained.

12. An operation control device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the swing amplitude control method of the piezoelectric load as claimed in any one of claims 8 to 11.

13. An air conditioning device, characterized in that: Includes the operation control device as claimed in claim 12.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the swing amplitude control method of a piezoelectric load according to any one of claims 8 to 11.

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