CN-121976946-A - Piezoelectric pump flow testing system and testing method

CN121976946ACN 121976946 ACN121976946 ACN 121976946ACN-121976946-A

Abstract

The invention relates to the technical field of piezoelectric pump testing, in particular to a piezoelectric pump flow testing system and a testing method, wherein the system comprises a testing workbench and a testing jig arranged on the testing workbench, wherein the testing jig is provided with a groove for placing a tested electric pump, and also comprises a liquid inlet and a liquid outlet and is internally provided with a liquid flow channel; the system comprises a testing workbench, a signal generator arranged below the testing workbench, a flowmeter electrically connected with the testing workbench and used for measuring the liquid flow, an operation interface arranged above the testing workbench and interconnected with the flowmeter and the signal generator, wherein the signal generator is used for providing driving signals for a tested electric pump and outputting square waves for liquid discharge and sine waves for measurement according to a set sequence, and the operation interface is used for carrying out flow testing, measurement alarming, flowmeter calibration, yield statistics, beat statistics, parameter setting and data derivation. The operator only needs to put the piezoelectric pump into the testing jig and press the start key button, so that the automatic flow test can be completed.

Inventors

QIU MENGMENG
ZHANG YONGLEI
HU YAN
WU YIFEI

Assignees

汉得利（常州）电子股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260127

Claims (10)

1. A piezoelectric pump flow test system, comprising: the testing device comprises a testing workbench and a testing jig arranged on the testing workbench, wherein the testing jig is provided with a groove for placing a tested electric pump, and the testing jig further comprises a liquid inlet and a liquid outlet and is internally provided with a liquid flow channel; The signal generator is arranged below the test workbench, is used for providing a driving signal for the tested electric pump and can output square waves for liquid discharge and sine waves for measurement according to a set sequence; a flow meter electrically connected to the test bench and configured to measure a flow rate of the liquid; The operation interface is arranged above the test workbench, is connected with the flowmeter and the signal generator, and is used for carrying out flow test, measurement alarm, flowmeter calibration, yield statistics, beat statistics, parameter setting and data export.
2. The piezoelectric pump flow test system of claim 1, wherein the test bench is provided with a recessed platform at the place where the test fixture is placed, and a leakage hole is provided at the edge of the recessed platform for preventing liquid from overflowing and draining.
3. The piezoelectric pump flow test system of claim 1, wherein the test fixture comprises an upper cover, the upper cover is connected with the side of the test fixture through a hinge, and the upper cover is provided with a spring probe structure for realizing electrical connection and elastic compression after the tested electric pump is placed in the groove.
4. The piezoelectric pump flow test system of claim 1, wherein said liquid flow channel is an annular flow channel.
5. The piezoelectric pump flow test system of claim 1, wherein said flow meter is mounted to said test bench and communicates with said operator interface via a wired or bus, said operator interface displaying real-time flow and storing test data.
6. The piezoelectric pump flow test system of claim 1, further comprising a liquid placement area disposed within the test bench, the liquid placement area being provided with a liquid level alarm, and sending an alarm to an operator interface and stopping testing or prompting fluid replacement when the liquid level is below a preset threshold.
7. The piezoelectric pump flow test system according to claim 1, wherein the operation interface has an automatic test start function, and when the tested piezoelectric pump is placed in the test fixture and the start key is pressed, the system automatically performs liquid discharge, measurement, determination and output of pass/fail results and statistical information according to a preset test flow.
8. The piezoelectric pump flow test system of claim 1, wherein the test bench has an exhaust or air inlet below the test fixture for exhaust and air intake operations during clamping or testing.
9. A method of testing a piezoelectric pump flow rate, characterized by testing a test system according to any one of claims 1 to 8, comprising the steps of: Placing the tested electric pump in the groove of the test fixture and closing the upper cover to enable the spring probe to be in contact with the tested electric pump; the operator presses a start key through the operation interface, and the central controller receives a start instruction; The signal generator outputs square wave driving signals according to a preset sequence so as to perform liquid discharge or exhaust treatment on the measured electric pump; after the square wave liquid discharge is completed, the signal generator is switched to output a sine wave driving signal with preset amplitude and frequency to perform stable flow test; during the test, the flowmeter measures the liquid outlet flow in real time and transmits measurement data to the operation interface and the central controller; The central controller outputs qualification/disqualification judgment to the tested electric pump according to the measurement data and a preset judgment standard, and displays the result and statistical information on the operation interface and stores the result and statistical information; if the liquid level is detected to be lower than the threshold value in any step, the liquid level alarm alarms to the central controller and pauses the test or prompts the liquid supplement according to preset logic; when short circuit occurs in the product or the testing process, the equipment automatically alarms and is powered off; and after the test is finished, performing data export or flowmeter calibration post-processing operation through the operation interface.
10. The method according to claim 9, wherein square wave parameters for liquid discharge, sine wave parameters for measurement and decision criteria are all set by the operation interface and recorded by a central controller.

Description

Piezoelectric pump flow testing system and testing method Technical Field The invention relates to the technical field of piezoelectric pump testing, in particular to a piezoelectric pump flow testing system and a testing method. Background Based on the flow test of the piezoelectric pump, the flow can be measured only according to the flow value on the flowmeter, parameter debugging is transferred to a computer for adjustment, the flow is required to be calibrated manually after the parameter is adjusted, the operation is complex, the efficiency is low, the operation requirement on operators is high, the error operation is easy to occur, and no error prevention exists. When testing, firstly adjusting the square wave to impact the product, then converting and adjusting the sine wave to test, and because the test voltage and the waveform are different, the conversion parameter setting is slower, 2 persons are required to cooperate to work, and no proper system test is needed. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. Disclosure of Invention The invention provides a piezoelectric pump flow test system and a test method, thereby effectively solving the problems in the background technology. In order to achieve the purpose, the invention adopts the technical scheme that the flow testing system of the piezoelectric pump comprises: the testing device comprises a testing workbench and a testing jig arranged on the testing workbench, wherein the testing jig is provided with a groove for placing a tested electric pump, and the testing jig further comprises a liquid inlet and a liquid outlet and is internally provided with a liquid flow channel; The signal generator is arranged below the test workbench, is used for providing a driving signal for the tested electric pump and can output square waves for liquid discharge and sine waves for measurement according to a set sequence; a flow meter electrically connected to the test bench and configured to measure a flow rate of the liquid; The operation interface is arranged above the test workbench, is connected with the flowmeter and the signal generator, and is used for carrying out flow test, measurement alarm, flowmeter calibration, yield statistics, beat statistics, parameter setting and data export. Further, the test workbench is provided with a concave platform at the position where the test fixture is placed, and leakage holes are formed in the edge of the concave platform and used for preventing liquid from overflowing and draining liquid. Further, the test fixture comprises an upper cover, the upper cover is connected with the side face of the test fixture through a hinge, and the upper cover is provided with a spring probe structure for realizing electric connection and elastic compression after the tested electric pump is placed in the groove. Further, the liquid flow channel is an annular flow channel. Further, the flowmeter is installed on the test workbench and is communicated with the operation interface in a wired or bus mode, and the operation interface displays real-time flow and stores test data. Further, the liquid level placing device also comprises a liquid level placing area, wherein the liquid level placing area is arranged in the test workbench, the liquid level placing area is provided with a liquid level alarm, and when the liquid level of the liquid is lower than a preset threshold value, an alarm is sent to the operation interface, and the test is stopped or the liquid supplement is prompted. Further, the operation interface has an automatic test starting function, namely, when the tested electric pump is placed in the test fixture and a starting key is pressed, the system automatically executes liquid discharge, measurement, judgment and output of qualified/unqualified results and statistical information according to a preset test flow. Further, an exhaust port or an air inlet is reserved below the test jig on the test workbench, and the exhaust port or the air inlet is used for exhaust and air inlet operation in the clamping or test process. The invention also comprises a flow testing method of the piezoelectric pump, which tests the testing system, and comprises the following steps: Placing the tested electric pump in the groove of the test fixture and closing the upper cover to enable the spring probe to be in contact with the tested electric pump; the operator presses a start key through the operation interface, and the central controller receives a start instruction; The signal generator outputs square wave driving signals according to a preset sequence so as to perform liquid discharge or exhaust treatment on the measured electric pump; after the square wave liquid discharge is completed