Piezoelectric pump flow testing system and testing method
The integrated piezoelectric pump flow testing system solves the problems of complex operation and low efficiency in existing technologies, realizes automated parameter setting and testing process, improves testing efficiency and consistency, and reduces the risk of human error.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BESTAR HLDG
- Filing Date
- 2026-01-27
- Publication Date
- 2026-05-05
AI Technical Summary
Existing piezoelectric pump flow testing is complex, requires manual calibration, is inefficient, prone to errors, and lacks an automated system, making it impossible to perform square wave and sine wave tests simultaneously.
An integrated piezoelectric pump flow testing system was designed, including a test bench, fixture, signal generator, flow meter and operation interface, to realize automated parameter setting and test process, support square wave discharge and sine wave measurement, and have automatic calibration and error prevention mechanisms.
It realizes automated and integrated control of piezoelectric pump flow testing, reduces operational complexity, improves testing efficiency and consistency, reduces the risk of human error, and provides reliable data support.
Smart Images
Figure CN121976946A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of piezoelectric pump testing technology, and in particular to a piezoelectric pump flow testing system and method. Background Technology
[0002] Based on piezoelectric pump flow testing, the flow rate can only be measured according to the flow rate value on the flow meter. Parameter adjustment requires switching to a computer, and after adjusting the parameters, the flow rate needs to be manually calibrated. The operation is complicated, inefficient, and requires high skill from the operator, making it prone to errors and lacking error prevention.
[0003] During operation, air entered the pipeline, requiring manual extraction of liquid to vent the air. During testing, a square wave was first adjusted to impact the product, and then a sine wave was switched and adjusted for testing. Due to the different test voltages and waveforms, the parameter setting was slow, requiring two people to work together. There was no suitable system for testing.
[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention
[0005] This invention provides a piezoelectric pump flow rate testing system and method, thereby effectively solving the problems in the background art.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a piezoelectric pump flow testing system, comprising: The test workbench and the test fixture mounted on the test workbench are provided with a groove for placing the pressure pump under test. The test fixture also includes a liquid inlet and a liquid outlet and has a liquid flow channel inside. The signal generator, located below the test bench, is used to provide a drive signal to the tested pressure pump and can output square waves for liquid discharge and sine waves for measurement in a set sequence. A flow meter electrically connected to the test bench and used to measure liquid flow rate; An operation interface is set above the test bench and interconnected with the flow meter and the signal generator. The operation interface is used to perform flow testing, measurement alarm, flow meter calibration, yield statistics, cycle time statistics, parameter setting and data export.
[0007] Furthermore, the test workbench has a recessed platform at the location where the test fixture is placed, and a leakage hole is provided at the edge of the recessed platform to prevent liquid overflow and to drain the liquid.
[0008] Furthermore, the test fixture includes a top cover, which is connected to the side of the test fixture via a hinge. The top cover is provided with a spring probe structure for achieving electrical connection and elastic compression after the pressure pump under test is placed into the groove.
[0009] Furthermore, the liquid flow channel is an annular flow channel.
[0010] Furthermore, the flow meter is installed on the test workbench and communicates with the operation interface via wired or bus connection. The operation interface displays the real-time flow rate and saves the test data.
[0011] Furthermore, it also includes a liquid placement area, which is located inside the test workbench. The liquid placement area is equipped with a liquid level alarm, which sends an alarm to the operation interface and stops the test or prompts for liquid replenishment when the liquid level is lower than a preset threshold.
[0012] Furthermore, the operating interface has an automatic test start function: when the pressure pump under test is placed on the test fixture and the start button is pressed, the system automatically performs drainage, measurement, judgment and outputs qualified / unqualified results and statistical information according to the preset test procedure.
[0013] Furthermore, the test workbench has an exhaust port or an air inlet below the test fixture for exhaust and air intake operations during clamping or testing.
[0014] The present invention also includes a method for testing the flow rate of a piezoelectric pump, which tests the test system described above, comprising the following steps: Place the pressure pump under test into the groove of the test fixture and close the top cover so that the spring probe contacts the pressure pump under test; The operator presses the start button through the operating interface, and the central controller receives the start command. The signal generator first outputs square wave drive signals in a preset sequence to perform liquid discharge or air venting on the tested pressure pump. After the square wave drainage is completed, the signal generator switches to output a sine wave drive signal with a preset amplitude and frequency to perform a stable flow test; During the test, the flow meter measures the liquid flow rate in real time and transmits the measurement data to the operation interface and the central controller; The central controller determines whether the output of the tested pressure pump is qualified or unqualified based on the measurement data and preset judgment criteria, and displays and saves the results and statistical information on the operation interface. If the liquid level is detected to be below the threshold at any step, the liquid level alarm will send an alarm to the central controller and suspend the test or prompt for liquid replenishment according to preset logic; When a short circuit occurs in the product or during testing, the equipment will automatically alarm and cut off the power. After the test is completed, post-processing operations such as data export or flow meter calibration can be performed through the operation interface.
[0015] Furthermore, the square wave parameters used for drainage, the sine wave parameters used for measurement, and the judgment criteria can all be set through the operation interface and recorded by the central controller.
[0016] The beneficial effects of this invention are as follows: the operator only needs to place the piezoelectric pump into the test fixture and press the start button to complete the automatic flow test; all parameter settings are completed on the operation interface; during the test, square wave drainage is performed first, followed by sine wave test; at the same time, the flow meter calibration can be completed directly through the interface with one click, without the need for mechanical button flow meter calibration. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the test system. Figure 2 This is a schematic diagram of the test fixture. Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 2 A structural diagram from another angle; Figure 5 This is a schematic diagram of the test workbench. Figure 6 A structural diagram showing the test workbench with its outer casing concealed. Figure 7 This is a schematic diagram of the structure on the back of the test workbench; Figure 8 This is a flowchart of the testing method. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0020] like Figures 1 to 7 As shown: A piezoelectric pump flow testing system, comprising: Test workbench 1, test fixture 2 installed on test workbench 1, test fixture 2 is provided with a groove 21 for placing the test pressure pump, test fixture 2 also includes a liquid inlet 22 and a liquid outlet 23 and has a liquid flow channel inside; The signal generator 3, located below the test bench 1, is used to provide a drive signal to the tested piezoelectric pump and can output square waves for liquid discharge and sine waves for measurement in a set sequence. A flow meter 4 is electrically connected to the test bench 1 and is used to measure the flow rate of the liquid. The operation interface 5 is located above the test bench 1 and is interconnected with the flow meter 4 and the signal generator 3. The operation interface 5 is used to perform flow testing, measurement alarm, flow meter 4 calibration, yield statistics, cycle time statistics, parameter setting and data export.
[0021] The operator only needs to place the piezoelectric pump into the test fixture 2 and press the start button to complete the automatic flow test; all parameter settings are completed on the operation interface 5. During the test, square wave drainage is performed first, followed by sine wave test; at the same time, the calibration of the flow meter 4 can be completed directly through the interface with one click, without the need for mechanical button calibration of the flow meter 4.
[0022] By integrating the test fixture 2, signal generator 3, flow meter 4, and operation interface 5, a high degree of automation and integrated control of the piezoelectric pump flow testing process is achieved. This system can automatically switch drive signal waveforms according to a preset procedure, first outputting a square wave signal to discharge liquid and vent air from the piezoelectric pump under test, and then automatically switching to a sine wave signal for flow testing. This avoids the operational complexity and inefficiency caused by manually switching test parameters repeatedly, effectively reducing reliance on the experience level of operators.
[0023] The signal generator 3 and flow meter 4 are centrally controlled via the user interface 5, enabling centralized setting of test parameters, real-time flow display, automatic alarm for abnormal conditions, and automatic calibration of the flow meter 4. This reduces the risk of manual intervention and misoperation, forming a comprehensive error prevention mechanism. The system can also automatically record test data and perform yield and test cycle statistics, providing reliable data support for quality control and efficiency analysis in the production process. Overall, this embodiment significantly improves the ease of operation, test consistency, and production efficiency of piezoelectric pump flow testing, making it suitable for batch and standardized piezoelectric pump performance testing scenarios.
[0024] The test workbench 1 has a recessed platform at the location where the test fixture 2 is placed, and a leakage hole is provided at the edge of the recessed platform to prevent liquid from overflowing and to drain the liquid.
[0025] In this embodiment, the test fixture 2 includes an upper cover 25, which is connected to the side of the test fixture 2 via a hinge 251. The upper cover 25 is provided with a spring probe structure 26, which is used to achieve electrical connection and elastic compression after the pressure pump under test is placed into the groove 21.
[0026] The test fixture 2 also includes a top cover 25, which is rotatably connected to the side of the test fixture 2 via a hinge 251. This allows for easy placement or removal of the pressure pump under test when open, and provides limitation and fixation for the pressure pump under test when closed. A spring probe structure 26 is provided on the top cover 25. The strength of the magnetic attraction has no impact on the product; different products can be obtained by replacing the test fixture 2. When the top cover 25 is closed, the spring probe structure 26 corresponds to the electrode terminals of the pressure pump under test, achieving electrical connection between the pressure pump under test and the signal generator 3 through elastic contact. Simultaneously, the spring applies a downward elastic clamping force to the pressure pump under test, ensuring stable contact within the groove 21.
[0027] As a preferred embodiment of the above, the liquid flow channel is an annular flow channel. By setting the liquid flow channel to an annular flow channel, the liquid resistance is reduced and the measurement is more accurate.
[0028] The flow meter 4 is installed on the test bench 1 and communicates with the operation interface 5 via wired or bus connection. The operation interface 5 displays the real-time flow and saves the test data.
[0029] In this embodiment, a liquid placement area is also included. The liquid placement area 6 is set inside the test workbench 1. The liquid placement area is equipped with a liquid level alarm. When the liquid level is lower than a preset threshold, an alarm is sent to the operation interface 5 and the test is stopped or a liquid replenishment prompt is given.
[0030] As a preferred embodiment of the above, the operation interface 5 has an automatic test start function: when the pressure pump under test is placed on the test fixture 2 and the start button is pressed, the system automatically performs drainage, measurement, judgment and outputs qualified / unqualified results and statistical information according to the preset test process.
[0031] The operation interface 5 has an automatic test start function. After the test pump is placed on the test fixture 2 and clamped, the operator triggers the start command through the operation interface 5, and the system automatically executes the test operation according to the preset test procedure. The test procedure includes the liquid discharge and air venting stage, the flow measurement stage, and the test result judgment stage. In the liquid discharge and air venting stage, the system control signal generator 3 outputs a drive signal for liquid discharge; in the flow measurement stage, the system control signal generator 3 switches to a measurement drive signal, and the flow meter 4 collects the flow data; in the test result judgment stage, the system compares the collected flow data with the preset judgment standard and automatically outputs the qualified or unqualified result of the test pump.
[0032] It enables one-click, streamlined control of the entire piezoelectric pump flow test process, eliminating the need for manual step-by-step operations and parameter switching, significantly reducing operational complexity and the probability of human intervention. Simultaneously, the system can synchronously complete the statistical recording of test results, providing data support for yield analysis and production management, further improving testing efficiency, judgment consistency, and the level of production line automation.
[0033] As a preferred embodiment of the above, the test workbench 1 has an exhaust port 11 or an air inlet 12 below the test fixture 2 for exhaust and air intake operations during clamping or testing.
[0034] The exhaust port 11 or air inlet 12 is connected to the liquid flow channel inside the test fixture 2, and is used to perform exhaust or air intake operations during the clamping stage of the tested pressure pump or during flow testing. By setting the exhaust port 11 or air inlet 12 below the test workbench 1, the air trapped in the pipeline and flow channel can be effectively discharged before system startup or during testing, or air can be introduced when necessary to assist in adjusting the liquid flow state.
[0035] like Figure 8 As shown, this embodiment also includes a piezoelectric pump flow rate testing method to test the testing system described above, comprising the following steps: Place the pressure pump under test in the groove 21 of the test fixture 2 and close the top cover 25 so that the spring probe contacts the pressure pump under test; The operator presses the start button through the operation interface 5, and the central controller receives the start command; Signal generator 3 outputs square wave drive signals in a preset sequence to perform liquid discharge or air venting on the tested pressure pump. After the square wave drainage is completed, signal generator 3 switches to output a sine wave drive signal with preset amplitude and frequency to conduct a stable flow test; During the test, the flow meter 4 measures the outflow rate in real time and transmits the measurement data to the operation interface 5 and the central controller. The central controller determines whether the output of the tested pneumatic pump is qualified or unqualified based on the measurement data and preset judgment criteria, and displays the results and statistical information on the operation interface 5 and saves them. If the liquid level is detected to be below the threshold at any step, the liquid level alarm will send an alarm to the central controller and suspend the test or prompt for liquid replenishment according to the preset logic. When a short circuit occurs during product testing, the equipment will automatically alarm and cut off power to prevent the short circuit from burning out the equipment. After the test is completed, perform post-processing operations such as data export or flow meter calibration through the operation interface 5.
[0036] This method initially uses a square wave drive signal to discharge or vent the tested piezoelectric pump at the start of the test, then automatically switches to a sine wave drive signal for flow measurement under stable operating conditions. This avoids the problem of manually switching drive waveforms and test parameters repeatedly, improving test efficiency and consistency. The central controller collects and judges the flow meter's measurement data in real time, automatically outputting pass / fail results and completing data recording and statistics, reducing errors caused by human judgment and forming an effective error prevention mechanism. Simultaneously, liquid level monitoring and alarm logic is introduced during the test. When the liquid level is abnormal, the test can be automatically paused or a liquid replenishment prompt can be issued, avoiding test distortion caused by insufficient liquid or air intake, further improving the reliability of the test results.
[0037] After testing, post-processing operations such as data export and flow meter calibration can be performed through the user interface 5, facilitating quality traceability and production management. Overall, this testing method simplifies the operation process, reduces reliance on operator skills, and significantly improves the automation level, testing stability, and batch testing efficiency of piezoelectric pump flow testing, demonstrating significant industrial application value.
[0038] Among them, the square wave parameters used for drainage, the sine wave parameters used for measurement, and the judgment criteria can all be set through the operation interface 5 and recorded by the central controller.
[0039] The square wave drive signal parameters used for drainage, the sine wave drive signal parameters used for flow measurement, and the corresponding flow determination criteria can all be set through the operation interface and recorded and stored by the central controller. The square wave parameters and sine wave parameters include at least one or more of the following: drive voltage amplitude, frequency, duty cycle, or waveform duration. The determination criteria include an upper limit flow rate, a lower limit flow rate, or a determination range.
[0040] Test conditions and judgment rules can be flexibly adjusted according to different models or performance levels of piezoelectric pumps, avoiding frequent parameter configuration on external equipment and improving the convenience and consistency of parameter settings. Meanwhile, the central controller manages and records test parameters and judgment criteria uniformly, which facilitates the traceability of test conditions and the repeatability of test results, further reducing the risk of human error and enhancing the versatility and reliability of the test system and methods.
[0041] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.
[0042] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A piezoelectric pump flow rate testing system, characterized in that, include: The test workbench and the test fixture mounted on the test workbench are provided with a groove for placing the pressure pump under test. The test fixture also includes a liquid inlet and a liquid outlet and has a liquid flow channel inside. The signal generator, located below the test bench, is used to provide a drive signal to the tested pressure pump and can output square waves for liquid discharge and sine waves for measurement in a set sequence. A flow meter electrically connected to the test bench and used to measure liquid flow rate; An operation interface is set above the test bench and interconnected with the flow meter and the signal generator. The operation interface is used to perform flow testing, measurement alarm, flow meter calibration, yield statistics, cycle time statistics, parameter setting and data export.
2. The piezoelectric pump flow testing system according to claim 1, characterized in that, The test workbench has a recessed platform at the location where the test fixture is placed, and a leakage hole is provided at the edge of the recessed platform to prevent liquid from overflowing and to drain the liquid.
3. The piezoelectric pump flow testing system according to claim 1, characterized in that, The test fixture includes a top cover, which is connected to the side of the test fixture via a hinge. The top cover is provided with a spring probe structure, which is used to achieve electrical connection and elastic compression after the pressure pump under test is placed into the groove.
4. The piezoelectric pump flow testing system according to claim 1, characterized in that, The liquid flow channel is an annular flow channel.
5. The piezoelectric pump flow testing system according to claim 1, characterized in that, The flow meter is installed on the test bench and communicates with the operation interface via wired or bus connection. The operation interface displays the real-time flow rate and saves the test data.
6. The piezoelectric pump flow testing system according to claim 1, characterized in that, It also includes a liquid placement area, which is set inside the test workbench. The liquid placement area is equipped with a liquid level alarm. When the liquid level is lower than a preset threshold, an alarm is sent to the operation interface and the test is stopped or a liquid replenishment prompt is given.
7. The piezoelectric pump flow testing system according to claim 1, characterized in that, The operating interface has an automatic test start function: when the pressure pump under test is placed on the test fixture and the start button is pressed, the system automatically performs the discharge, measurement, judgment and outputs qualified / unqualified results and statistical information according to the preset test procedure.
8. The piezoelectric pump flow testing system according to claim 1, characterized in that, The test workbench has an exhaust port or air inlet below the test fixture for exhaust and air intake operations during clamping or testing.
9. A method for testing the flow rate of a piezoelectric pump, characterized in that, Testing the test system as described in any one of claims 1 to 8 includes the following steps: Place the pressure pump under test into the groove of the test fixture and close the top cover so that the spring probe contacts the pressure pump under test; The operator presses the start button through the operating interface, and the central controller receives the start command. The signal generator first outputs square wave drive signals in a preset sequence to perform liquid discharge or air venting on the tested pressure pump. After the square wave drainage is completed, the signal generator switches to output a sine wave drive signal with a preset amplitude and frequency to perform a stable flow test; During the test, the flow meter measures the liquid flow rate in real time and transmits the measurement data to the operation interface and the central controller; The central controller determines whether the output of the tested pressure pump is qualified or unqualified based on the measurement data and preset judgment criteria, and displays and saves the results and statistical information on the operation interface. If the liquid level is detected to be below the threshold at any step, the liquid level alarm will send an alarm to the central controller and suspend the test or prompt for liquid replenishment according to preset logic. When a short circuit occurs in the product or during testing, the equipment will automatically alarm and cut off the power. After the test is completed, perform data export or flow meter calibration post-processing operations through the operation interface.
10. The piezoelectric pump flow rate testing method according to claim 9, characterized in that, The square wave parameters used for drainage, the sine wave parameters used for measurement, and the judgment criteria can all be set through the operation interface and recorded by the central controller.