A method, device and equipment for positioning a piezoelectric valve striker and a storage medium

Abstract

The application discloses a piezoelectric valve striker positioning method, device, equipment and storage medium, and the method comprises the following steps: sending a fixed frequency and a fixed voltage difference to a piezoelectric ceramic, driving the piezoelectric valve striker to move at a preset time as a period, acquiring the capacitance value and the current value of the piezoelectric ceramic in each period, calculating and determining the capacitance change amount in each period, and determining the current value corresponding to the period with the maximum capacitance change amount as the positioning current value. It can be seen that the capacitance value of the piezoelectric ceramic changes by driving the piezoelectric valve striker to move, and the capacitance value of the piezoelectric ceramic changes most obviously when the piezoelectric valve striker contacts the nozzle, so that the current value at this time is determined as the positioning current value. Since the indicator light is on when the current value of the piezoelectric ceramic is the positioning current value, the engineer can know that the piezoelectric valve striker is positioned when the indicator light is on by observing the indicator light when the piezoelectric ceramic is subjected to pressure, and the positioning efficiency of the piezoelectric valve striker is improved.

Description

Technical Field

[0001] This application relates to the field of positioning technology, and more specifically, to a positioning method, device, equipment, and storage medium for a piezoelectric valve device. Background Technology

[0002] With the continuous development of precision machinery technology, dispensing technology is widely used in the machinery industry. Electronic adhesives are applied to finished products to achieve functions such as bonding, potting, insulation, fixation, and surface smoothing. Currently, dispensing is controlled by engineers using piezoelectric dispensing valves. Before dispensing, the position of the ejector pin inside the valve body needs to be adjusted so that it just contacts the nozzle. At this point, the ejector pin is at the perfect tension; if it is too loose, adhesive leakage will occur; if it is too tight, the impact force between the ejector pin and the nozzle will be insufficient, resulting in poor dispensing quality. Generally, engineers adjust based on experience, using a method of dispensing and adjusting simultaneously to judge the ejector pin positioning and dispensing status.

[0003] However, engineers need to adjust and wipe the nozzle multiple times during the positioning and debugging process, which results in low positioning efficiency of the piezoelectric valve striker. Summary of the Invention

[0004] In view of the above problems, this application is made to provide a positioning method, apparatus, device and storage medium for a piezoelectric valve device, so as to improve the positioning efficiency of the piezoelectric valve striker.

[0005] To achieve the above objectives, the following specific solutions are proposed:

[0006] A method for positioning a piezoelectric valve device includes:

[0007] A signal with a fixed frequency and a fixed voltage difference is sent to the piezoelectric ceramic so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference;

[0008] When the piezoelectric ceramic operates at the fixed frequency and the fixed voltage difference, the piezoelectric valve striker of the piezoelectric ceramic is driven to move at a preset time period to obtain the capacitance and current values ​​of the piezoelectric ceramic in each cycle. The electrical energy used to drive the piezoelectric valve striker in the next cycle is greater than the electrical energy used to drive the piezoelectric valve striker in the current cycle.

[0009] Calculate the change in capacitance value in each cycle relative to the capacitance value in the previous cycle, and determine the capacitance change in each cycle.

[0010] Among the current values ​​in each cycle, the current value corresponding to the cycle with the largest change in capacitance is determined as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, an indicator light for indicating successful positioning is turned on.

[0011] Optionally, obtaining the current value of the piezoelectric ceramic in each cycle includes:

[0012] The current of the piezoelectric ceramic in each cycle is sampled by a sampling resistor to obtain the sampling current;

[0013] The sampled current is rectified and amplified by a rectifier amplifier to obtain a current amplification signal.

[0014] The current amplification signal is filtered to obtain the current value of the piezoelectric ceramic in each cycle.

[0015] Optionally, before sending a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic, the method further includes:

[0016] The piezoelectric ceramic is continuously charged and discharged to obtain a piezoelectric ceramic with a preset temperature.

[0017] Optionally, after determining the current value of the period with the largest capacitance change among the current values ​​in each period as the positioning current value of the piezoelectric valve pin of the piezoelectric ceramic, the method further includes:

[0018] The positioning current value is displayed on the display interface.

[0019] A positioning device for a piezoelectric valve striker pin, comprising:

[0020] A fixed signal transmitting unit is used to transmit a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference.

[0021] The capacitance current acquisition unit is used to acquire the capacitance value and current value of the piezoelectric ceramic in each cycle by driving the piezoelectric valve striker of the piezoelectric ceramic to move in the working state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, with a preset time as the cycle. The electrical energy driving the piezoelectric valve striker to move in the next cycle is greater than the electrical energy driving the piezoelectric valve striker to move in the current cycle.

[0022] The capacitance change calculation unit is used to calculate the change in capacitance value in each cycle relative to the capacitance value in the previous cycle, and to determine the capacitance change in each cycle.

[0023] The positioning current value determination unit is used to determine the current value corresponding to the period with the largest capacitance change among the current values ​​of each period, which is the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, an indicator light for indicating successful positioning is turned on.

[0024] Optionally, the capacitor current acquisition unit includes:

[0025] The capacitance acquisition unit is used to acquire the capacitance value of the piezoelectric ceramic in each cycle by driving the piezoelectric valve pin of the piezoelectric ceramic to move in the working state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, with a preset time period.

[0026] A current sampling unit is used to sample the current of the piezoelectric ceramic in each cycle through a sampling resistor to obtain the sampled current;

[0027] The rectifier-amplifier unit is used to rectify and amplify the sampled current through a rectifier amplifier to obtain a current amplified signal.

[0028] The filtering unit is used to filter the current amplified signal to obtain the current value of the piezoelectric ceramic in each cycle.

[0029] Optionally, the device may also include:

[0030] The heating unit is used to continuously charge and discharge the piezoelectric ceramic before the fixed signal transmitting unit sends a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic, so as to obtain a piezoelectric ceramic with a temperature reaching a preset temperature.

[0031] Optionally, the device may also include:

[0032] The display unit is used to determine the current value of the period with the largest capacitance change among the current values ​​of each period by the positioning current value determination unit, and then display the positioning current value on the display interface after determining the positioning current value as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic.

[0033] A positioning device for a piezoelectric valve striker includes a memory and a processor;

[0034] The memory is used to store programs;

[0035] The processor is used to execute the program to implement the various steps of the piezoelectric valve striker positioning method as described above.

[0036] A storage medium storing a computer program, which, when executed by a processor, implements the various steps of the piezoelectric valve striker positioning method as described above.

[0037] By employing the above technical solution, this application sends a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic, enabling the piezoelectric ceramic to operate at the fixed frequency and the fixed voltage difference. Under the operating state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, the piezoelectric valve striker of the piezoelectric ceramic is driven to move at a preset time interval. The capacitance and current values ​​of the piezoelectric ceramic in each cycle are obtained. The electrical energy driving the piezoelectric valve striker to move in the next cycle is greater than the electrical energy driving the piezoelectric valve striker to move in the current cycle. Further, the change in capacitance value in each cycle relative to the capacitance value in the previous cycle is calculated to determine the capacitance change in each cycle. Among the current values ​​in each cycle, the current value corresponding to the cycle with the largest capacitance change is determined as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, an indicator light for indicating successful positioning is activated. Therefore, by fixing the operating frequency and voltage difference of the piezoelectric ceramic, the movement of its piezoelectric valve striker is driven, causing a change in the capacitance value of the piezoelectric ceramic. Since the capacitance value of the piezoelectric ceramic is proportional to the current value, and the change in capacitance value is most significant when the piezoelectric valve striker contacts the nozzle, it is possible to determine that the current value at this time is the positioning current value. Because the indicator light illuminates when the current value of the piezoelectric ceramic is the positioning current value, engineers can directly observe the indicator light to know that the piezoelectric valve striker has completed positioning when applying pressure to the piezoelectric ceramic to move the piezoelectric valve striker, thus improving the positioning efficiency of the piezoelectric valve striker. Attached Figure Description

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0039] Figure 1 A schematic diagram illustrating a process for positioning the striker of a piezoelectric valve, provided in an embodiment of this application;

[0040] Figure 2 A circuit topology diagram for sampling piezoelectric ceramic current provided in an embodiment of this application;

[0041] Figure 3 A circuit topology diagram of a rectifier amplifier provided in an embodiment of this application;

[0042] Figure 4 A circuit topology diagram for filtering current amplified signals provided in an embodiment of this application;

[0043] Figure 5 A schematic diagram of a device for positioning a piezoelectric valve striker according to an embodiment of this application;

[0044] Figure 6 This is a schematic diagram of a device for positioning a piezoelectric valve striker, provided as an embodiment of this application. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] The proposed solution can be implemented based on a terminal with data processing capabilities, such as a computer, server, or cloud platform.

[0047] Next, combined Figure 1 The positioning method for the piezoelectric valve striker of this application may include the following steps:

[0048] Step S110: Send a signal with a fixed frequency and a signal with a fixed voltage difference to the piezoelectric ceramic so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference.

[0049] Specifically, the fixed frequency can represent the frequency applied to the capacitor of the piezoelectric ceramic, and the fixed voltage difference can represent the voltage applied to the capacitor of the piezoelectric ceramic.

[0050] It is understandable that piezoelectric ceramics satisfy the formula: I = 2πfCU, where I represents the current flowing through the piezoelectric ceramic, f represents the frequency applied to the capacitor of the piezoelectric ceramic, C represents the capacitance of the piezoelectric ceramic, and U represents the voltage applied to the capacitor of the piezoelectric ceramic. Therefore, when the frequency applied to the capacitor of the piezoelectric ceramic and the voltage applied to the capacitor are fixed, the current flowing through the piezoelectric ceramic is directly proportional to the capacitance of the piezoelectric ceramic.

[0051] Step S120: Under the working state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, with a preset time period, the piezoelectric valve striker of the piezoelectric ceramic is driven to move, and the capacitance value and current value of the piezoelectric ceramic in each cycle are obtained.

[0052] Specifically, the preset time can represent the interval time for current sampling, and the preset time can be customized, such as 0.5s. The movement direction of the piezoelectric valve pin can be the direction of contact with the nozzle.

[0053] It is understandable that when pressure is applied to the two ends of the piezoelectric ceramic capacitor, the capacitance of the capacitor will change. The movement of the piezoelectric valve pin can be driven by the pressure applied to the two ends of the piezoelectric ceramic capacitor. Therefore, when the piezoelectric valve pin moves, the capacitance of the piezoelectric ceramic capacitor will change, and the current of the piezoelectric ceramic will also change accordingly.

[0054] Step S130: Calculate the change in capacitance value in each cycle relative to the capacitance value in the previous cycle, and determine the capacitance change in each cycle.

[0055] Specifically, the capacitance value of the current period can be subtracted from the capacitance value of the previous period to obtain the capacitance change in the current period. The capacitance change can represent the magnitude of the capacitance change from the previous period to the current period.

[0056] Step S140: Among the current values ​​of each cycle, determine the current value corresponding to the cycle with the largest change in capacitance, which is the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the piezoelectric valve striker moves and the current value of the piezoelectric ceramic is the positioning current value, turn on the indicator light to indicate successful positioning.

[0057] Specifically, the positioning current value can represent the current value of the piezoelectric ceramic when the piezoelectric valve's striker pin is just aligned with the nozzle.

[0058] Among them, when the frequency of the piezoelectric ceramic applied to the capacitor and the voltage applied to the capacitor are constant, the current value of the piezoelectric ceramic is proportional to the capacitance value of the piezoelectric ceramic.

[0059] It is understandable that the piezoelectric valve striker and the piezoelectric ceramic are connected by a lever. When the piezoelectric valve striker contacts the nozzle, if the piezoelectric valve striker is tightened at this time, the increased force will be borne entirely by the piezoelectric ceramic. Therefore, the capacitance of the piezoelectric ceramic changes the most at this time. Thus, the current value corresponding to the period with the largest capacitance change can be determined as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic.

[0060] Furthermore, if the indicator light remains on, it indicates that the current value of the piezoelectric ceramic is constant at the positioning current value, until the current value of the piezoelectric ceramic is no longer the positioning current value, at which point the indicator light turns off.

[0061] The piezoelectric valve striker positioning method provided in this embodiment sends a signal of a fixed frequency and a signal of a fixed voltage difference to the piezoelectric ceramic, so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference. Under the operating state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, the piezoelectric valve striker of the piezoelectric ceramic is driven to move at a preset time period. The capacitance value and current value of the piezoelectric ceramic in each cycle are obtained. The electrical energy driving the piezoelectric valve striker to move in the next cycle is greater than the electrical energy driving the piezoelectric valve striker to move in the current cycle. Further, the change in capacitance value in each cycle relative to the capacitance value in the previous cycle is calculated to determine the capacitance change in each cycle. Among the current values ​​in each cycle, the current value corresponding to the cycle with the largest capacitance change is determined as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, an indicator light for indicating successful positioning is turned on. Therefore, by fixing the operating frequency and voltage difference of the piezoelectric ceramic, the movement of its piezoelectric valve striker is driven, causing a change in the capacitance value of the piezoelectric ceramic. Since the capacitance value of the piezoelectric ceramic is proportional to the current value, and the change in capacitance value is most significant when the piezoelectric valve striker contacts the nozzle, it is possible to determine that the current value at this time is the positioning current value. Because the indicator light illuminates when the current value of the piezoelectric ceramic is the positioning current value, engineers can directly observe the indicator light to know that the piezoelectric valve striker has completed positioning when applying pressure to the piezoelectric ceramic to move the piezoelectric valve striker, thus improving the positioning efficiency of the piezoelectric valve striker.

[0062] In some embodiments of this application, the process of obtaining the current value of the piezoelectric ceramic in each cycle, as mentioned in the above embodiments, is described. This process may include:

[0063] S1. The current of the piezoelectric ceramic in each cycle is sampled by a sampling resistor to obtain the sampling current.

[0064] Specifically, it can be done through, for example Figure 2 In the circuit topology shown, sampling resistor R15 samples the current of the piezoelectric ceramic in each cycle. R12 and R13 are both current-limiting resistors, VH1 is the external connection interface, and OPA_PZT is connected to the piezoelectric ceramic.

[0065] S2. The sampled current is rectified and amplified by a rectifier amplifier to obtain a current amplified signal.

[0066] Specifically, it can be done through, for example Figure 3The rectifier circuit in the illustrated rectifier amplifier circuit topology rectifies the sampled current into an analog quantity that can be captured by the analog-to-digital converter. This analog quantity is then amplified by a differential amplifier to obtain the amplified current signal. Figure 3 In the circuit topology shown, R27, R32, R26, R33, diode D10, diode D11, R34, R35, operational amplifier U5A and operational amplifier U6A form a rectifier circuit, R40, R43, R41, R44 and operational amplifier U6B form a differential amplifier, and CUR_OUT is the input of the sampling current.

[0067] S3. Filter the current amplification signal to obtain the current value of the piezoelectric ceramic in each cycle.

[0068] Specifically, it can be done through, for example Figure 4 The circuit topology shown filters the current amplification signal. Among them, Figure 4 In the circuit topology shown, R29, R37, C21, C22, and C23 constitute a sampling filter circuit to filter the current amplification signal. R30, R31, R28, and R38, together with operational amplifier U8A, constitute a differential amplifier, which can further amplify the filtered signal to obtain the current value.

[0069] In some embodiments of this application, to avoid drift in the sampling results due to temperature rise during current sampling, the following may be included before sending a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic as mentioned in the above embodiments:

[0070] The piezoelectric ceramic is continuously charged and discharged to obtain a piezoelectric ceramic with a preset temperature.

[0071] Specifically, the preset temperature can represent the temperature that will not change during the current sampling process.

[0072] It is understandable that by continuously charging and discharging the piezoelectric ceramic, the piezoelectric ceramic can be continuously heated and kept constant at a preset temperature. At this temperature, sampling the current will not cause temperature changes, thereby avoiding sampling result drift and making the sampling results more stable and reliable.

[0073] In some embodiments of this application, considering providing engineers with a more intuitive understanding of the final quantitative positioning results, after determining the current value of the period with the largest capacitance change among the current values ​​in each cycle, as mentioned in the above embodiments, as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic, the following may also be included:

[0074] The positioning current value is displayed on the display interface.

[0075] Understandably, after determining the positioning current value, the engineer can observe this value on the display interface, which makes it easier for the engineer to set the positioning current value as the current value that illuminates the indicator light when the piezoelectric valve striker of the piezoelectric ceramic is successfully positioned.

[0076] In addition, the pressure value across the capacitor of the piezoelectric ceramic can be calculated based on the capacitance value of the period with the largest capacitance change, and this pressure value can be displayed on the display interface for engineers' reference. This provides guidance for engineers to increase their experience in adjusting the piezoelectric valve striker.

[0077] The positioning device for realizing the piezoelectric valve striker provided in the embodiments of this application will be described below. The positioning device for realizing the piezoelectric valve striker described below can be referred to in correspondence with the positioning method for realizing the piezoelectric valve striker described above.

[0078] See Figure 5 , Figure 5 This is a schematic diagram of a positioning device for a piezoelectric valve striker disclosed in an embodiment of this application.

[0079] like Figure 5 As shown, the device may include:

[0080] The fixed signal transmitting unit 11 is used to transmit a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference.

[0081] The capacitance current acquisition unit 12 is used to acquire the capacitance value and current value of the piezoelectric ceramic in each cycle by driving the piezoelectric valve striker of the piezoelectric ceramic to move in the working state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, with a preset time as the cycle. The electrical energy driving the piezoelectric valve striker to move in the next cycle is greater than the electrical energy driving the piezoelectric valve striker to move in the current cycle.

[0082] The capacitance change calculation unit 13 is used to calculate the change in capacitance value in each cycle relative to the capacitance value in the previous cycle, and to determine the capacitance change in each cycle.

[0083] The positioning current value determination unit 14 is used to determine the current value corresponding to the period with the largest capacitance change among the current values ​​of each period, which is the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic, so that when the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, the indicator light for indicating successful positioning is turned on.

[0084] Optionally, the capacitor current acquisition unit includes:

[0085] The capacitance acquisition unit is used to acquire the capacitance value of the piezoelectric ceramic in each cycle by driving the piezoelectric valve pin of the piezoelectric ceramic to move in the working state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, with a preset time period.

[0086] A current sampling unit is used to sample the current of the piezoelectric ceramic in each cycle through a sampling resistor to obtain the sampled current;

[0087] The rectifier-amplifier unit is used to rectify and amplify the sampled current through a rectifier amplifier to obtain a current amplified signal.

[0088] The filtering unit is used to filter the current amplified signal to obtain the current value of the piezoelectric ceramic in each cycle.

[0089] Optionally, the device may also include:

[0090] The heating unit is used to continuously charge and discharge the piezoelectric ceramic before the fixed signal transmitting unit sends a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic, so as to obtain a piezoelectric ceramic with a temperature reaching a preset temperature.

[0091] Optionally, the device may also include:

[0092] The display unit is used to determine the current value of the period with the largest capacitance change among the current values ​​of each period by the positioning current value determination unit, and then display the positioning current value on the display interface after determining the positioning current value as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic.

[0093] The piezoelectric valve striker positioning device provided in this application embodiment can be applied to devices for positioning piezoelectric valve strikers, such as terminals like mobile phones and computers. Optionally, Figure 6 The hardware structure block diagram of the device for positioning the piezoelectric valve striker is shown, with reference to... Figure 6 The hardware structure of the device for positioning the piezoelectric valve striker may include: at least one processor 1, at least one communication interface 2, at least one memory 3, and at least one communication bus 4.

[0094] In this embodiment of the application, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4;

[0095] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0096] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0097] The memory stores a program, which the processor can call. The program is used for:

[0098] A signal with a fixed frequency and a fixed voltage difference is sent to the piezoelectric ceramic so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference;

[0099] When the piezoelectric ceramic operates at the fixed frequency and the fixed voltage difference, the piezoelectric valve striker of the piezoelectric ceramic is driven to move at a preset time period to obtain the capacitance and current values ​​of the piezoelectric ceramic in each cycle. The electrical energy used to drive the piezoelectric valve striker in the next cycle is greater than the electrical energy used to drive the piezoelectric valve striker in the current cycle.

[0100] Calculate the change in capacitance value in each cycle relative to the capacitance value in the previous cycle, and determine the capacitance change in each cycle.

[0101] Among the current values ​​in each cycle, the current value corresponding to the cycle with the largest change in capacitance is determined as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, an indicator light for indicating successful positioning is turned on.

[0102] Optionally, the refined and extended functions of the program can be found in the description above.

[0103] This application embodiment also provides a storage medium that can store a program suitable for execution by a processor, the program being used for:

[0104] A signal with a fixed frequency and a fixed voltage difference is sent to the piezoelectric ceramic so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference;

[0105] When the piezoelectric ceramic operates at the fixed frequency and the fixed voltage difference, the piezoelectric valve striker of the piezoelectric ceramic is driven to move at a preset time period to obtain the capacitance and current values ​​of the piezoelectric ceramic in each cycle. The electrical energy used to drive the piezoelectric valve striker in the next cycle is greater than the electrical energy used to drive the piezoelectric valve striker in the current cycle.

[0106] Calculate the change in capacitance value in each cycle relative to the capacitance value in the previous cycle, and determine the capacitance change in each cycle.

[0107] Among the current values ​​in each cycle, the current value corresponding to the cycle with the largest change in capacitance is determined as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, an indicator light for indicating successful positioning is turned on.

[0108] Optionally, the refined and extended functions of the program can be found in the description above.

[0109] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0110] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0111] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for positioning the striker pin of a piezoelectric valve, characterized in that, include: A signal with a fixed frequency and a fixed voltage difference is sent to the piezoelectric ceramic so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference; When the piezoelectric ceramic operates at the fixed frequency and the fixed voltage difference, the piezoelectric valve striker of the piezoelectric ceramic is driven to move at a preset time period to obtain the capacitance and current values ​​of the piezoelectric ceramic in each cycle. The electrical energy used to drive the piezoelectric valve striker in the next cycle is greater than the electrical energy used to drive the piezoelectric valve striker in the current cycle. Calculate the change in capacitance value in each cycle relative to the capacitance value in the previous cycle, and determine the capacitance change in each cycle. Among the current values ​​in each cycle, the current value corresponding to the cycle with the largest change in capacitance is determined as the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, an indicator light for indicating successful positioning is turned on.

2. The method according to claim 1, characterized in that, Obtaining the current value of the piezoelectric ceramic in each cycle includes: The current of the piezoelectric ceramic in each cycle is sampled by a sampling resistor to obtain the sampling current; The sampled current is rectified and amplified by a rectifier amplifier to obtain a current amplification signal. The current amplification signal is filtered to obtain the current value of the piezoelectric ceramic in each cycle.

3. The method according to claim 1, characterized in that, Before sending a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic, the method further includes: The piezoelectric ceramic is continuously charged and discharged to obtain a piezoelectric ceramic with a preset temperature.

4. The method according to any one of claims 1-3, characterized in that, After determining the current value of the period with the largest capacitance change among the current values ​​in each period, which is the positioning current value of the piezoelectric valve pin of the piezoelectric ceramic, the process further includes: The positioning current value is displayed on the display interface.

5. A positioning device for a piezoelectric valve striker pin, characterized in that, include: A fixed signal transmitting unit is used to transmit a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic so that the piezoelectric ceramic can operate at the fixed frequency and the fixed voltage difference. The capacitance current acquisition unit is used to acquire the capacitance value and current value of the piezoelectric ceramic in each cycle by driving the piezoelectric valve striker of the piezoelectric ceramic to move in the working state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, with a preset time as the cycle. The electrical energy driving the piezoelectric valve striker to move in the next cycle is greater than the electrical energy driving the piezoelectric valve striker to move in the current cycle. The capacitance change calculation unit is used to calculate the change in capacitance value in each cycle relative to the capacitance value in the previous cycle, and to determine the capacitance change in each cycle. The positioning current value determination unit is used to determine the current value corresponding to the period with the largest capacitance change among the current values ​​of each period, which is the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic. When the movement of the piezoelectric valve striker causes the current value of the piezoelectric ceramic to be the positioning current value, an indicator light for indicating successful positioning is turned on.

6. The apparatus according to claim 5, characterized in that, The capacitor current acquisition unit includes: The capacitance acquisition unit is used to acquire the capacitance value of the piezoelectric ceramic in each cycle by driving the piezoelectric valve pin of the piezoelectric ceramic to move in the working state of the piezoelectric ceramic at the fixed frequency and the fixed voltage difference, with a preset time period. A current sampling unit is used to sample the current of the piezoelectric ceramic in each cycle through a sampling resistor to obtain the sampled current; The rectifier-amplifier unit is used to rectify and amplify the sampled current through a rectifier amplifier to obtain a current amplified signal. The filtering unit is used to filter the current amplified signal to obtain the current value of the piezoelectric ceramic in each cycle.

7. The apparatus according to claim 5, characterized in that, Also includes: The heating unit is used to continuously charge and discharge the piezoelectric ceramic before the fixed signal transmitting unit sends a signal of fixed frequency and a signal of fixed voltage difference to the piezoelectric ceramic, so as to obtain a piezoelectric ceramic with a preset temperature.

8. The apparatus according to any one of claims 5-7, characterized in that, Also includes: The display unit is used to determine the current value of the period with the largest capacitance change among the current values ​​of each period by the positioning current value determination unit, and then display the positioning current value on the display interface after determining the positioning current value of the piezoelectric valve striker of the piezoelectric ceramic.

9. A positioning device for a piezoelectric valve striker pin, characterized in that, Including memory and processor; The memory is used to store programs; The processor is configured to execute the program to implement the various steps of the positioning method for the piezoelectric valve striker as described in any one of claims 1-4.

10. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the various steps of the positioning method for the piezoelectric valve striker as described in any one of claims 1-4.

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