Glue dispensing controller structure, piezoelectric ceramic discharge time determination method and device

Abstract

The present invention provides a dispensing controller structure, a method and a device for determining the discharge time of piezoelectric ceramics. The dispensing controller structure includes: a first voltage sensor circuit, a second voltage sensor circuit, a control unit and a driving circuit; the input end of the first voltage sensor circuit is respectively connected to the output end of the driving circuit and the external piezoelectric ceramic; the input end of the second voltage sensor circuit is connected to the piezoelectric ceramic; the input end of the control unit is respectively connected to the output end of the first voltage sensor circuit and the output end of the second voltage sensor circuit, the output end of the control unit is connected to the input end of the driving circuit; the output end of the driving circuit is also connected to the piezoelectric ceramic. The present invention can reduce the secondary charge and discharge time and the switching loss of the power device, and improve the dispensing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of piezoelectric ceramics, and in particular to a dispensing controller structure, a method and a device for determining a piezoelectric ceramic discharge time. Background Art

[0002] At present, there are two main methods to reduce the charging and discharging time of piezoelectric ceramics:

[0003] 1. Piezoelectric ceramics are capacitive loads. Applying a certain amplitude voltage across their two ends can cause them to deform. Their charging time is proportional to the applied voltage amplitude, so increasing the applied voltage amplitude can reduce their charging time. This method of increasing the voltage applied across the piezoelectric ceramics has obvious disadvantages: first, at a fixed switching frequency, increasing the applied voltage amplitude will increase the charging current of the piezoelectric ceramics linearly, which can easily damage the piezoelectric ceramics; second, the voltage amplitude range that piezoelectric ceramics can withstand is limited, so this method has limitations.

[0004] 2. Use SPWM technology to reasonably adjust the switching frequency and on / off time of the driving waveform, and then amplify its power through the hardware power amplifier circuit, linearly adjust the rising edge time and falling edge time of the output voltage amplitude waveform of the push-pull circuit, so as to reduce the charging time of the piezoelectric ceramic. From the perspective of working stability and product modularization, this solution has obvious defects: First, precise adjustment of the charging time of piezoelectric ceramics requires a high-frequency switching frequency, which increases the switching loss of the power switching device and increases the difficulty of product thermal design. Secondly, a higher switching frequency requires hardware and software design with faster response time, and the switching noise generated will be transmitted to both ends of the piezoelectric ceramic through the line, causing the charging voltage waveform amplitude to fluctuate, thereby affecting the dispensing accuracy and reducing product reliability.

[0005] Therefore, in practical applications, how to improve the dispensing effect by controlling the charging current of piezoelectric ceramics has become a problem that needs to be solved urgently. Summary of the invention

[0006] The main purpose of the embodiments of the present invention is to provide a dispensing controller structure, a method and device for determining the discharge time of piezoelectric ceramics, so as to reduce the secondary charge and discharge time and the switching loss of power devices and improve the dispensing effect.

[0007] In order to achieve the above object, an embodiment of the present invention provides a dispensing controller structure, including:

[0008] a first voltage sensor circuit, a second voltage sensor circuit, a control unit, and a drive circuit;

[0009] The input end of the first voltage sensor circuit is connected to the output end of the driving circuit and the external piezoelectric ceramic respectively, and is used to collect the ceramic voltage applied to the piezoelectric ceramic by the driving circuit;

[0010] The input end of the second voltage sensor circuit is connected to the piezoelectric ceramic and is used to collect the residual voltage on the piezoelectric ceramic;

[0011] The input end of the control unit is connected to the output end of the first voltage sensor circuit and the output end of the second voltage sensor circuit respectively, and the output end of the control unit is connected to the input end of the driving circuit, and is used to adjust the piezoelectric ceramic discharge time according to the ceramic voltage and the residual voltage, and output a driving control signal to the driving circuit according to the adjusted piezoelectric ceramic discharge time;

[0012] The output end of the driving circuit is also connected to the piezoelectric ceramic and is used to apply a ceramic voltage to the piezoelectric ceramic according to a driving control signal.

[0013] In one embodiment, it also includes:

[0014] A signal processing circuit is used for filtering, amplifying and analog-to-digital conversion of ceramic voltage and residual voltage, wherein the first input end of the signal processing circuit is connected to the output end of the first voltage sensor circuit, the second input end of the signal processing circuit is connected to the output end of the second voltage sensor circuit, and the output end of the signal processing circuit is connected to the input end of the control unit.

[0015] The first voltage sensor circuit of the dispensing controller structure of the embodiment of the present invention collects the ceramic voltage applied by the driving circuit to the piezoelectric ceramic, and the second voltage sensor circuit collects the residual voltage on the piezoelectric ceramic. The control unit adjusts the discharge time of the piezoelectric ceramic according to the ceramic voltage and the residual voltage and then outputs a driving control signal to the driving circuit. The driving circuit applies a ceramic voltage to the piezoelectric ceramic according to the driving control signal, and reduces the secondary charge and discharge time and the switching loss of the power device by increasing the residual voltage at both ends of the piezoelectric ceramic, thereby improving the dispensing effect.

[0016] The embodiment of the present invention further provides a method for determining a piezoelectric ceramic discharge time, comprising:

[0017] Determine the remaining charging time based on the ceramic voltage amplitude and the residual voltage amplitude;

[0018] The piezoelectric ceramic discharge time is determined based on the relationship curve between the initial residual voltage and time, the remaining charging time, and the relationship curve between the target residual voltage and time.

[0019] In one embodiment, determining the piezoelectric ceramic discharge time according to the relationship curve between the initial residual voltage and time, the remaining charging time, and the relationship curve between the target residual voltage and time includes:

[0020] Determine the voltage-time integral area based on the relationship curve between the initial residual voltage and time and the remaining charging time;

[0021] The piezoelectric ceramic discharge time is determined based on the voltage-time integrated area and the target residual voltage-time relationship curve.

[0022] In one embodiment, determining the remaining charging time according to the ceramic voltage amplitude and the residual voltage amplitude includes:

[0023] Determine the initial charging time based on the ceramic voltage amplitude;

[0024] Determine the residual charging time according to the ceramic voltage amplitude and the residual voltage amplitude;

[0025] The remaining charging time is determined based on the initial charging time and the residual charging time.

[0026] The embodiment of the present invention further provides a device for determining a piezoelectric ceramic discharge time, comprising:

[0027] A remaining charging time determination module is used to determine the remaining charging time according to the ceramic voltage amplitude and the residual voltage amplitude;

[0028] The piezoelectric ceramic discharge time determination module is used to determine the piezoelectric ceramic discharge time according to the relationship curve between the initial residual voltage and time, the remaining charging time and the relationship curve between the target residual voltage and time.

[0029] In one embodiment, the piezoelectric ceramic discharge time determination module includes:

[0030] A voltage-time integrated area unit, used to determine a voltage-time integrated area according to a curve of the relationship between the initial residual voltage and time and the remaining charging time;

[0031] The piezoelectric ceramic discharge time unit is used to determine the piezoelectric ceramic discharge time according to the voltage-time integrated area and the relationship curve between the target residual voltage and time.

[0032] In one embodiment, the remaining charging time determination module includes:

[0033] An initial charging time unit, used to determine the initial charging time according to the ceramic voltage amplitude;

[0034] A residual charging time unit, used to determine the residual charging time according to the ceramic voltage amplitude and the residual voltage amplitude;

[0035] The remaining charging time unit is used to determine the remaining charging time according to the initial charging time and the remaining charging time.

[0036] An embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of the piezoelectric ceramic discharge time determination method when executing the computer program.

[0037] The embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for determining the discharge time of piezoelectric ceramics are implemented.

[0038] The piezoelectric ceramic discharge time determination method and device of the embodiment of the present invention first determines the remaining charging time according to the ceramic voltage amplitude and the residual voltage amplitude, and then determines the piezoelectric ceramic discharge time according to the relationship curve between the initial residual voltage and time, the remaining charging time and the target residual voltage and time. This can reduce the secondary charging and discharging time and the switching loss of the power device and improve the dispensing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 is a schematic diagram of the structure of a dispensing controller in an embodiment of the present invention;

[0041] Figure 2 Schematic diagram of the charging and discharging process of the dispensing controller structure in an embodiment of the present invention;

[0042] Figure 3 is a flow chart of a method for determining a piezoelectric ceramic discharge time in an embodiment of the present invention;

[0043] Figure 4 is a schematic diagram of a ceramic voltage curve in an embodiment of the present invention;

[0044] Figure 5 is a flow chart of S101 in an embodiment of the present invention;

[0045] Figure 6 is a flow chart of S102 in an embodiment of the present invention;

[0046] Figure 7 is a structural block diagram of a device for determining a piezoelectric ceramic discharge time in an embodiment of the present invention;

[0047] Figure 8 It is a structural block diagram of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Those skilled in the art will appreciate that the embodiments of the present invention may be implemented as a system, device, apparatus, method or computer program product. Therefore, the present disclosure may be specifically implemented in the following forms, namely: complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0050] The abbreviations and key terms used in the present invention are defined as follows:

[0051] 1. Piezoelectric ceramics: An electronic ceramic material with piezoelectric properties that can realize the mutual conversion between mechanical deformation and electrical energy. This conversion process is called the piezoelectric effect. Piezoelectric ceramics are widely used in medical imaging, acoustic sensors, ignition and detonation devices, piezoelectric gyroscopes, and precision dispensing.

[0052] 2. Glue dispensing controller: Also known as glue dispensing machine, glue coating machine, glue dripping machine, glue spraying machine and glue filling machine, it is an automated machine that controls the fluid and drips and applies the fluid to the surface or inside of the product. It can achieve three-dimensional and four-dimensional path dispensing, precise positioning, precise glue control, no drawing, no glue leakage, and no glue dripping. The glue dispensing controller is mainly used for the precise dotting, injection, coating, and dripping of glue, paint and other liquids in the product process to the precise position of each product. It can be used to achieve dotting, drawing lines, circles or arcs.

[0053] In view of the fact that the prior art is prone to damage piezoelectric ceramics and reduce product reliability, the embodiments of the present invention provide a dispensing controller structure, a method and device for determining the discharge time of piezoelectric ceramics, which, without increasing the voltage amplitude applied to both ends of the piezoelectric ceramics, increases the residual pressure at both ends of the piezoelectric ceramics by changing the conduction time and switching frequency of the upper and lower switch tubes in the driving circuit, reduces the secondary charge and discharge time and the switching loss of the power device, and improves the dispensing effect. The present invention is described in detail below in conjunction with the accompanying drawings.

[0054] Figure 1 Schematic diagram of the dispensing controller structure in an embodiment of the present invention. Figure 2 Schematic diagram of the charging and discharging process of the dispensing controller structure in the embodiment of the present invention. Figure 1-Figure 2 As shown, the dispensing controller structure includes:

[0055] A first voltage sensor circuit, a second voltage sensor circuit, a control unit and a drive circuit; wherein the first voltage sensor circuit, the second voltage sensor circuit, the control unit and the drive circuit are all integrated on a circuit board inside the dispensing controller.

[0056] The input end of the first voltage sensor circuit is connected to the output end of the driving circuit and the external piezoelectric ceramic respectively, and is used to collect the ceramic voltage applied to the piezoelectric ceramic by the driving circuit.

[0057] The input end of the second voltage sensor circuit is connected to the two ends of the electrodes of the piezoelectric ceramic, and is used to collect the residual voltage on the piezoelectric ceramic.

[0058] The time range of each real-time acquisition by the first voltage sensor circuit and the second voltage sensor circuit is greater than the piezoelectric ceramic charging time and not greater than the set charging duration. The set charging duration refers to the valve closing duration set by the dispensing controller, which is set before the dispensing controller works and generally remains unchanged during the working process. The piezoelectric ceramic discharge time refers to the time from the controller sending a command to the piezoelectric ceramic discharging, which is almost the same as the piezoelectric ceramic charging time.

[0059] The input end of the control unit is respectively connected to the output end of the first voltage sensor circuit and the output end of the second voltage sensor circuit, and the output end of the control unit is connected to the input end of the driving circuit. A large amount of parameter data for different residual voltage climbing characteristics of piezoelectric ceramics (such as piezoelectric ceramic discharge time) can be pre-built in and stored in the main control chip in the form of a parameter database.

[0060] When the dispensing controller is working, the control unit adjusts the piezoelectric ceramic discharge time according to the ceramic voltage and the residual voltage, determines the switching frequency and duty cycle of the driving waveform according to the adjusted piezoelectric ceramic discharge time, and outputs the corresponding driving control signal to the driving circuit, controls the switching time of the switching device in the driving circuit, and then controls the charging and discharging time of the piezoelectric ceramic, and changes the voltage amplitude (residual voltage) at both ends of the piezoelectric ceramic. It can be seen that the present invention can form a closed loop of the control signal through the detection and feedback of the residual voltage amplitude.

[0061] The output end of the driving circuit is also connected to the piezoelectric ceramic and is used to apply a ceramic voltage to the piezoelectric ceramic according to a driving control signal.

[0062] like Figure 1 As shown, the dispensing controller structure also includes:

[0063] A signal processing circuit for filtering, amplifying and analog-to-digital conversion of ceramic voltage and residual voltage is integrated on a circuit board inside the dispensing controller. The first input end of the signal processing circuit is connected to the output end of the first voltage sensor circuit, the second input end of the signal processing circuit is connected to the output end of the second voltage sensor circuit, and the output end of the signal processing circuit is connected to the input end of the control unit.

[0064] In a specific implementation, the first voltage sensor circuit and the second voltage sensor circuit both scale down the voltage to meet the input signal level amplitude of the operational amplifier in the back-end signal processing circuit; the scaled-down voltage is input into the signal processing circuit for filtering, inversion, proportional amplification and analog-to-digital conversion, and the converted digital signal is transmitted to the control unit in the specified SPI mode, and the control unit calculates the voltage amplitude climbing characteristics over time.

[0065] In summary, the first voltage sensor circuit of the dispensing controller structure of the embodiment of the present invention collects the ceramic voltage applied by the driving circuit to the piezoelectric ceramic, and the second voltage sensor circuit collects the residual voltage on the piezoelectric ceramic. The control unit adjusts the discharge time of the piezoelectric ceramic according to the ceramic voltage and the residual voltage and then outputs a driving control signal to the driving circuit. The driving circuit applies a ceramic voltage to the piezoelectric ceramic according to the driving control signal, and reduces the secondary charge and discharge time and the switching loss of the power device by increasing the residual voltage at both ends of the piezoelectric ceramic, thereby improving the dispensing effect.

[0066] Based on the same inventive concept, an embodiment of the present invention further provides a method for determining a piezoelectric ceramic discharge time. Figure 3 4 is a flow chart of a method for determining a piezoelectric ceramic discharge time in an embodiment of the present invention. Figure 4 Schematic diagram of ceramic voltage curve in the embodiment of the present invention. Figure 3-Figure 4 As shown, the method for determining the discharge time of piezoelectric ceramics includes:

[0067] S101: Determine the remaining charging time according to the ceramic voltage amplitude and the residual voltage amplitude.

[0068] Figure 5 is a flow chart of S101 in an embodiment of the present invention. Figure 5 As shown, S101 includes:

[0069] S201: Determine the initial charging time according to the ceramic voltage amplitude.

[0070] In specific implementation, the initial charging time can be determined by the following formula:

[0071]

[0072] Among them, t is the initial charging time, R is the resistance of the dispensing controller, C is the piezoelectric ceramic capacitor, and U is the ceramic voltage amplitude.

[0073] S202: Determine the residual charging time according to the ceramic voltage amplitude and the residual voltage amplitude.

[0074] In specific implementation, the remaining charging time can be determined by the following formula:

[0075]

[0076] Among them, Δt 1 is the residual charging time, and U′ is the residual voltage amplitude.

[0077] S203: Determine the remaining charging time according to the initial charging time and the remaining charging time.

[0078] Among them, the remaining charging time is the initial charging time t and the residual charging time Δt 1 The difference.

[0079] S102: Determine the piezoelectric ceramic discharge time according to the curve of the relationship between the initial residual voltage and time, the remaining charging time, and the curve of the relationship between the target residual voltage and time.

[0080] Figure 6 is a flow chart of S102 in an embodiment of the present invention. Figure 6 As shown, S102 includes:

[0081] S301: Determine a voltage-time integral area according to a curve of the relationship between the initial residual voltage and time (initial voltage climbing characteristic) and the remaining charging time.

[0082] like Figure 4 As shown in the figure, the voltage-time integral area is the relationship between the initial residual voltage and time at T 0 +Δt 1 With T 0 +t area.

[0083] S302: Determine the piezoelectric ceramic discharge time according to the voltage-time integrated area and the target residual voltage-time relationship curve (target voltage climbing characteristic).

[0084] In specific implementation, the voltage time integral area is consistent with the residual voltage time integral area during secondary charge and discharge. Figure 4 As shown in the figure, the residual voltage time integral area is the relationship curve between the target residual voltage and time at T′ 1 and T′ 1 +Δt 2 Therefore, the residual voltage time integral area can be obtained based on the voltage time integral area, and the piezoelectric ceramic discharge time Δt can be obtained on the premise of determining the relationship curve between the target residual voltage and time. 2Under ideal conditions, the piezoelectric ceramic discharge time is almost the same as the piezoelectric ceramic charging time. The voltage rise characteristics include the voltage rise slope and the change of the rise details.

[0085] Figure 3 The execution subject of the method for determining the discharge time of piezoelectric ceramics shown in the figure may be a control unit of a computer or a dispensing controller. Figure 3 It can be seen from the process shown that the method for determining the piezoelectric ceramic discharge time in an embodiment of the present invention first determines the remaining charging time based on the ceramic voltage amplitude and the residual voltage amplitude, and then determines the piezoelectric ceramic discharge time based on the relationship curve between the initial residual voltage and time, the remaining charging time and the target residual voltage and time. This can reduce the secondary charging and discharging time and the switching loss of the power device and improve the dispensing effect.

[0086] like Figure 4 As shown, at T 0 Before the moment, there is no voltage in the piezoelectric ceramic, and the voltage at the first voltage sensor circuit is the operating voltage (ceramic voltage); the voltage at the second voltage sensor circuit is the residual voltage of the piezoelectric ceramic. If the lower-level switching device in the driving circuit is in a closed state (reaching a certain duration t), the residual voltage amplitude of the piezoelectric ceramic drops to 0.

[0087] T 0 At this moment, the piezoelectric ceramic starts to charge. During the voltage rise of the piezoelectric ceramic, the first voltage sensor circuit collects the upper limit amplitude of the working voltage (ceramic voltage), and the second voltage sensor circuit collects the voltage amplitude rise curve (T 0 Moment and T 0 +t time). When the piezoelectric ceramic is at T 1 When discharging at the moment, the first voltage sensor circuit collects the upper limit amplitude of the working voltage (ceramic voltage), and the second voltage sensor circuit collects the voltage amplitude drop curve (T 1 Moment and T 1 +t time). The voltage-time integral area can be determined based on the charge and discharge of the piezoelectric ceramic.

[0088] T 1 At this moment, the piezoelectric ceramic starts to charge again. During the voltage rise of the piezoelectric ceramic, the first voltage sensor circuit collects the upper limit amplitude of the working voltage (ceramic voltage), and the second voltage sensor circuit collects the voltage amplitude rise curve (T′) of the piezoelectric ceramic electrode. 0 Time and T′ 0 +t time). When the piezoelectric ceramic is at T′ 1When discharging at the same time, the first voltage sensor circuit collects the upper limit amplitude of the working voltage (ceramic voltage), and the second voltage sensor circuit collects the voltage amplitude drop curve (T') of the piezoelectric ceramic electrode. 1 Time and T′ 1 +Δt 2 When the residual voltage in the piezoelectric ceramics exceeds the piezoelectric ceramics discharge time Δt 2 When the residual voltage amplitude continues to decrease (T' 1 +Δt 2 The control unit controls the driving circuit to recharge the piezoelectric ceramics. In this process, the control unit adjusts the discharge time of the piezoelectric ceramics by the feedback ceramic voltage and the residual voltage, and controls the on / off time and frequency of the upper and lower switch devices in the subsequent driving circuit according to the adjusted discharge time of the piezoelectric ceramics, thereby changing the voltage amplitude at both ends of the piezoelectric ceramics, dynamically controlling the residual voltage within the range of the residual voltage amplitude, and achieving the purpose of reducing the recharging time of the piezoelectric ceramics.

[0089] To summarize, the present invention sets a first voltage sensor circuit and a second sensor circuit at the electrical interface of the piezoelectric ceramic through a dispensing controller. During the charging and discharging process of the piezoelectric ceramic, the first voltage sensor circuit feeds back the ceramic voltage in real time, and the second voltage sensor circuit feeds back the residual voltage to the control unit in real time to adjust the piezoelectric ceramic discharge time to obtain a suitable piezoelectric ceramic charging and discharging time, thereby achieving the purpose of reducing the charging and discharging time of the piezoelectric ceramic, extending the service life of the piezoelectric ceramic, improving the working efficiency of the dispensing equipment in the actual production process, and reducing the heat generation and power consumption of the dispensing controller.

[0090] Based on the same inventive concept, an embodiment of the present invention further provides a device for determining the discharge time of piezoelectric ceramics. Since the principle of solving the problem by the device is similar to that of the method for determining the discharge time of piezoelectric ceramics, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0091] Figure 7 is a structural block diagram of a device for determining a piezoelectric ceramic discharge time in an embodiment of the present invention. Figure 7 As shown, the piezoelectric ceramic discharge time determining device comprises:

[0092] A remaining charging time determination module is used to determine the remaining charging time according to the ceramic voltage amplitude and the residual voltage amplitude;

[0093] The piezoelectric ceramic discharge time determination module is used to determine the piezoelectric ceramic discharge time according to the relationship curve between the initial residual voltage and time, the remaining charging time and the relationship curve between the target residual voltage and time.

[0094] In one embodiment, the piezoelectric ceramic discharge time determination module includes:

[0095] A voltage-time integrated area unit, used to determine a voltage-time integrated area according to a curve of the relationship between the initial residual voltage and time and the remaining charging time;

[0096] The piezoelectric ceramic discharge time unit is used to determine the piezoelectric ceramic discharge time according to the voltage-time integrated area and the relationship curve between the target residual voltage and time.

[0097] In one embodiment, the remaining charging time determination module includes:

[0098] An initial charging time unit, used to determine the initial charging time according to the ceramic voltage amplitude;

[0099] A residual charging time unit, used to determine the residual charging time according to the ceramic voltage amplitude and the residual voltage amplitude;

[0100] The remaining charging time unit is used to determine the remaining charging time according to the initial charging time and the remaining charging time.

[0101] In summary, the piezoelectric ceramic discharge time determination device of the embodiment of the present invention first determines the remaining charging time according to the ceramic voltage amplitude and the residual voltage amplitude, and then determines the piezoelectric ceramic discharge time according to the relationship curve between the initial residual voltage and time, the remaining charging time and the target residual voltage and time. The curve can reduce the secondary charge and discharge time and the switching loss of the power device and improve the dispensing effect.

[0102] The embodiment of the present invention also provides a specific implementation of a computer device capable of implementing all the steps in the method for determining the discharge time of piezoelectric ceramics in the above embodiment. Figure 8 is a block diagram of a computer device in an embodiment of the present invention, see Figure 8 , the computer equipment specifically includes the following contents:

[0103] Processor (processor) 801 and memory (memory) 802.

[0104] The processor 801 is used to call the computer program in the memory 802. When the processor executes the computer program, all steps in the method for determining the discharge time of piezoelectric ceramics in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0105] Determine the remaining charging time based on the ceramic voltage amplitude and the residual voltage amplitude;

[0106] The piezoelectric ceramic discharge time is determined based on the relationship curve between the initial residual voltage and time, the remaining charging time, and the relationship curve between the target residual voltage and time.

[0107] In summary, the computer device of the embodiment of the present invention first determines the remaining charging time based on the ceramic voltage amplitude and the residual voltage amplitude, and then determines the piezoelectric ceramic discharge time based on the relationship curve between the initial residual voltage and time, the remaining charging time and the target residual voltage and time. This can reduce the secondary charging and discharging time and the switching loss of the power device and improve the dispensing effect.

[0108] The embodiment of the present invention also provides a computer-readable storage medium capable of implementing all the steps in the method for determining the discharge time of piezoelectric ceramics in the above embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps in the method for determining the discharge time of piezoelectric ceramics in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0109] Determine the remaining charging time based on the ceramic voltage amplitude and the residual voltage amplitude;

[0110] The piezoelectric ceramic discharge time is determined based on the relationship curve between the initial residual voltage and time, the remaining charging time, and the relationship curve between the target residual voltage and time.

[0111] In summary, the computer-readable storage medium of the embodiment of the present invention first determines the remaining charging time according to the ceramic voltage amplitude and the residual voltage amplitude, and then determines the piezoelectric ceramic discharge time according to the relationship curve between the initial residual voltage and time, the remaining charging time and the target residual voltage and time. The relationship curve can reduce the secondary charging and discharging time and the switching loss of the power device and improve the dispensing effect.

[0112] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0113] Those skilled in the art may also understand that the various illustrative logical blocks, units, and steps listed in the embodiments of the present invention may be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly demonstrate the interchangeability of hardware and software, the various illustrative components, units, and steps described above have generally described their functions. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present invention.

[0114] The various illustrative logic blocks, or units, or devices described in the embodiments of the present invention can be implemented or operated by a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field programmable gate array or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination of the above. The general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any conventional processor, controller, microcontroller or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.

[0115] The steps of the method or algorithm described in the embodiments of the present invention can be directly embedded in hardware, a software module executed by a processor, or a combination of the two. The software module can be stored in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or other storage media of any form in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a user terminal. Optionally, the processor and the storage medium can also be arranged in different components in the user terminal.

[0116] In one or more exemplary designs, the above functions described in the embodiments of the present invention can be implemented in hardware, software, firmware or any combination of the three. If implemented in software, these functions can be stored on a computer-readable medium, or transmitted in the form of one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media that facilitate the transfer of computer programs from one place to another. The storage medium can be any available medium that can be accessed by any general or special computer. For example, such computer-readable media can include but are not limited to RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store program codes in the form of instructions or data structures and other forms that can be read by general or special computers, or general or special processors. In addition, any connection can be appropriately defined as a computer-readable medium, for example, if the software is transmitted from a website site, server or other remote resource through a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wirelessly, such as infrared, wireless and microwave, it is also included in the defined computer-readable medium. The disk and disc include compact disk, laser disk, optical disk, DVD, floppy disk and blue-ray disk. Disks usually copy data magnetically, while discs usually copy data optically with lasers. The above combination can also be included in computer readable media.

Claims

1. A method for determining the discharge time of a piezoelectric ceramic, characterized in that: include: Determine the remaining charging time based on the ceramic voltage amplitude and the residual voltage amplitude; Determine the piezoelectric ceramic discharge time according to the curve of the relationship between the initial residual voltage and time, the curve of the relationship between the remaining charging time and the target residual voltage and time; Determining the piezoelectric ceramic discharge time according to the relationship curve between the initial residual voltage and time, the relationship curve between the remaining charging time and the target residual voltage and time includes: Determine the voltage-time integral area according to the curve of the relationship between the initial residual voltage and time and the remaining charging time; Determine the piezoelectric ceramic discharge time according to the voltage-time integrated area and the target residual voltage-time relationship curve; Determining the remaining charging time based on the ceramic voltage amplitude and the residual voltage amplitude includes: determining an initial charging time according to the ceramic voltage amplitude; Determining a residual charging time according to the ceramic voltage amplitude and the residual voltage amplitude; The remaining charging time is determined according to the initial charging time and the remaining charging time.

2. A device for determining a piezoelectric ceramic discharge time, characterized in that: include: A remaining charging time determination module is used to determine the remaining charging time according to the ceramic voltage amplitude and the residual voltage amplitude; A piezoelectric ceramic discharge time determination module, used to determine the piezoelectric ceramic discharge time according to a curve of relationship between an initial residual voltage and time, a curve of relationship between the remaining charging time and a target residual voltage and time; The piezoelectric ceramic discharge time determination module comprises: A voltage-time integrated area unit, used to determine a voltage-time integrated area according to a curve of the relationship between the initial residual voltage and time and the remaining charging time; A piezoelectric ceramic discharge time unit, used to determine the piezoelectric ceramic discharge time according to the voltage-time integrated area and a curve of the relationship between the target residual voltage and time; The remaining charging time determination module includes: An initial charging time unit, used to determine the initial charging time according to the ceramic voltage amplitude; A residual charging time unit, used to determine the residual charging time according to the ceramic voltage amplitude and the residual voltage amplitude; The remaining charging time unit is used to determine the remaining charging time according to the initial charging time and the remaining charging time.

3. A dispensing controller structure, characterized in that: include: a first voltage sensor circuit, a second voltage sensor circuit, a control unit, and a drive circuit; The input end of the first voltage sensor circuit is connected to the output end of the driving circuit and the external piezoelectric ceramic respectively, and is used to collect the ceramic voltage applied by the driving circuit to the piezoelectric ceramic; The input end of the second voltage sensor circuit is connected to the piezoelectric ceramic and is used to collect the residual voltage on the piezoelectric ceramic; The input end of the control unit is connected to the output end of the first voltage sensor circuit and the output end of the second voltage sensor circuit respectively, and the output end of the control unit is connected to the input end of the drive circuit, and is used to adjust the piezoelectric ceramic discharge time according to the ceramic voltage and the residual voltage based on the piezoelectric ceramic discharge time determination method according to claim 1, and output a drive control signal to the drive circuit according to the adjusted piezoelectric ceramic discharge time; The output end of the driving circuit is also connected to the piezoelectric ceramic and is used to apply a ceramic voltage to the piezoelectric ceramic according to the driving control signal.

4. The dispensing controller structure according to claim 3 is characterized in that: Also includes: A signal processing circuit is used to filter, amplify and perform analog-to-digital conversion on the ceramic voltage and the residual voltage, wherein a first input end of the signal processing circuit is connected to an output end of the first voltage sensor circuit, a second input end of the signal processing circuit is connected to an output end of the second voltage sensor circuit, and an output end of the signal processing circuit is connected to an input end of the control unit.

5. A computer device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the method for determining the discharge time of piezoelectric ceramics according to claim 1 are implemented.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the discharge time of piezoelectric ceramics according to claim 1 are implemented.

Images