Method for detecting pressure characteristics of proportional electromagnetic valve

Abstract

The invention relates to the technical field of automatic testing, in particular to a method for detecting the pressure characteristic of a proportional electromagnetic valve, the method is executed by a system for detecting the pressure characteristic of the proportional electromagnetic valve, the system comprises a hydraulic station and a testing tool connected through a high-pressure oil pipe, and the testing tool is provided with a proportional electromagnetic valve to be tested; comprising the steps that after a detection interface of a test tool receives a deviation value input by a user, under the condition that the detection interface receives a test starting button triggered by the user, an input current value of a to-be-tested proportional electromagnetic valve is adjusted according to a preset adjustment strategy, and an output pressure value of the to-be-tested proportional electromagnetic valve under the specified input current value is obtained; the test tool judges whether the proportional electromagnetic valve to be tested is qualified under the specified input current value according to the output pressure value of the proportional electromagnetic valve to be tested under the specified input current value, a preset standard pressure value corresponding to the specified input current value and the deviation value, and a first judgment result is obtained.

Description

Technical Field

[0001] The present invention relates to the field of automated testing technology, and in particular to a method for detecting pressure characteristics of a proportional solenoid valve. Background Art

[0002] Traditional proportional solenoid valve testing methods rely primarily on manual operation and readings, which are not only inefficient but also significantly affected by human factors, making it difficult to ensure the consistency and accuracy of test results. With the advancement of industrial automation, higher requirements are being placed on the accuracy and response speed of proportional solenoid valves. There is an urgent need for an automated testing technology that can quickly and accurately evaluate their operating characteristics. Summary of the Invention

[0003] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a method for detecting the pressure characteristics of a proportional solenoid valve, which solves the technical problems of low detection efficiency, poor accuracy and insufficient automation in the prior art.

[0004] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0005] An embodiment of the present invention provides a method for detecting pressure characteristics of a proportional solenoid valve. The method is performed by a system for detecting pressure characteristics of a proportional solenoid valve. The system includes a hydraulic station and a test fixture connected by a high-pressure oil pipe, wherein the test fixture is mounted with a proportional solenoid valve to be tested. The method includes:

[0006] After the detection interface of the test fixture receives the deviation value input by the user and receives the start test button triggered by the user on the detection interface, the input current value of the proportional solenoid valve to be tested is adjusted according to the pre-set adjustment strategy, and the output pressure value of the proportional solenoid valve to be tested under the specified input current value is obtained;

[0007] The detection interface of the test tool displays a start test button;

[0008] The testing tool determines whether the proportional solenoid valve to be tested is qualified under the specified input current value based on the output pressure value of the proportional solenoid valve to be tested under the specified input current value, the pre-set standard pressure value corresponding to the specified input current value, and the deviation value, and obtains a first judgment result.

[0009] Preferably, adjusting the input current value of the proportional solenoid valve to be tested according to a preset adjustment strategy specifically includes:

[0010] Starting from the 0% input current value of the proportional solenoid valve to be tested, the input current value is gradually increased until the input current value of 100% is reached.

[0011] Preferably,

[0012] Among them, the specified input current value includes: 0% input current value, 10% input current value, 20% input current value, 30% input current value, 40% input current value, 50% input current value, 60% input current value, 70% input current value, 80% input current value, 90% input current value, and 100% input current value.

[0013] Preferably,

[0014] The test tool determines whether the proportional solenoid valve to be tested is qualified at the specified input current value based on the output pressure value of the proportional solenoid valve to be tested at the specified input current value, the preset standard pressure value corresponding to the specified input current value, and the deviation value, and obtains a first judgment result, specifically including:

[0015] The test fixture obtains a first absolute value corresponding to the specified output current value based on the output pressure value of the proportional solenoid valve to be tested under the specified input current value and a preset standard pressure value corresponding to the specified input current value;

[0016] The first absolute value corresponding to the specified output current value is the absolute value between the output pressure value of the proportional solenoid valve to be tested under the specified input current value and the preset standard pressure value corresponding to the specified input current value;

[0017] According to the first absolute value corresponding to the specified output current value and the deviation value, it is judged whether the proportional solenoid valve to be tested is qualified under the specified input current value, and a first judgment result is obtained.

[0018] Preferably, judging whether the proportional solenoid valve to be tested is qualified under the specified input current value according to the first absolute value corresponding to the specified output current value and the deviation value, and obtaining a first judgment result specifically includes:

[0019] If the first absolute value corresponding to the specified output current value is greater than the deviation value, then a first judgment result is determined as that the proportional solenoid valve to be tested is unqualified under the specified input current value;

[0020] If the first absolute value corresponding to the specified output current value is less than or equal to the deviation value, it is determined that the first judgment result is that the proportional solenoid valve to be tested is qualified under the specified input current value.

[0021] Preferably, the method further comprises:

[0022] The test fixture obtains a first fitting curve obtained when the start test button is triggered by the user this time, based on the output pressure value of the proportional solenoid valve to be tested at the specified input current value;

[0023] The first fitting curve is a curve obtained by fitting the output pressure values of the proportional solenoid valve to be tested under all specified input current values.

[0024] Preferably, the method further comprises:

[0025] When the detection interface receives a detection button triggered by the user, judging whether the proportional solenoid valve to be tested is qualified according to the N first fitting curves obtained in advance and the second fitting curve obtained in advance, and obtaining a second judgment result;

[0026] The detection interface of the test tool displays a detection button;

[0027] The second fitting curve is a curve obtained by fitting pre-set standard pressure values corresponding to all specified input current values.

[0028] Preferably, judging whether the proportional solenoid valve to be tested is qualified based on the N first fitting curves obtained in advance and the second fitting curve obtained in advance, and obtaining a second judgment result specifically includes:

[0029] Determine whether the N pre-acquired first fitting curves and the pre-acquired second fitting curve meet a pre-set qualification condition, and if so, determine a second judgment result that the proportional solenoid valve to be tested is qualified;

[0030] The pre-set qualification condition is that the N first fitting curves obtained in advance and the second fitting curve obtained in advance satisfy formula (1) and formula (2);

[0031] Wherein, the formula (1) is:

[0032] max|y n (x)-y a (x)|≤θ;

[0033] θ is the deviation value entered by the user;

[0034] y n (x) is the value of the nth first fitting curve corresponding to the second fitting curve at the same abscissa point x in the same coordinate system;

[0035] y a (x) is the value of the second fitting curve corresponding to the nth first fitting curve among the N first fitting curves at the same abscissa point x in the same coordinate system as the second fitting curve;

[0036] The formula (2) is:

[0037] max|y n (x)-y t (x)|≤θ;

[0038] y t (x) is the value of the t-th first fitting curve corresponding to the same arbitrary abscissa point x of the N first fitting curves in the same coordinate system; wherein t≠n.

[0039] Preferably, N is greater than or equal to 8.

[0040] Preferably,

[0041] The detection interface of the test fixture further displays a pass indicator light and a fail indicator light corresponding to the first specified input current value respectively;

[0042] The first specified input current value includes: 10% input current value, 20% input current value, 30% input current value, 40% input current value, 50% input current value, 60% input current value, 70% input current value, 80% input current value, 90% input current value, and 100% input current value;

[0043] When the proportional solenoid valve to be tested is qualified at the first specified input current value, the qualified indicator light corresponding to the first specified input current value lights up;

[0044] When the proportional solenoid valve to be tested fails to meet the requirements at the first specified input current value, the failure indicator light corresponding to the first specified input current value lights up.

[0045] The beneficial effects of the present invention are:

[0046] The present invention provides a method for detecting the pressure characteristics of a proportional solenoid valve. Since the method starts the test by receiving the deviation value input by the user and triggering the start test button through the detection interface, and gradually adjusts the input current value and obtains the corresponding output pressure value according to a pre-set adjustment strategy, compared with the existing technology, it can accurately cover the key data points within the input current range of the proportional solenoid valve, thereby comprehensively evaluating the pressure characteristics of the solenoid valve, achieving the effect of improving detection accuracy, optimizing operation procedures and enhancing the visualization of detection results.

[0047] The present invention provides a method for detecting the pressure characteristics of a proportional solenoid valve. Since a preset standard pressure value is compared with a deviation value input by the user, compared to the prior art, it can automatically determine whether the solenoid valve is qualified, reduce human judgment errors, and achieve the effect of improving the accuracy and consistency of the test results. By gradually increasing the input current to cover the range from 0% to 100% through a preset adjustment strategy, compared to the prior art, it can more comprehensively collect output pressure characteristic data under different input currents, achieving the effect of systematically analyzing the performance of the proportional solenoid valve. Since the detection process realizes automated control and real-time data collection, compared to the prior art, it can shorten the detection time, improve test efficiency, and achieve the effect of improving the productivity of the detection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a flow chart of a method for detecting pressure characteristics of a proportional solenoid valve according to the present invention;

[0049] Figure 2 This is a schematic diagram of the detection interface in an embodiment of the present invention;

[0050] Figure 3 This is the functional interface of the data table in the embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0052] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0053] Example 1

[0054] See also Figure 1 This embodiment provides a method for detecting the pressure characteristics of a proportional solenoid valve. The method is performed by a system for detecting the pressure characteristics of a proportional solenoid valve. The system includes a hydraulic station and a test fixture connected via a high-pressure oil pipe, wherein the test fixture is mounted with a proportional solenoid valve to be tested. The method includes:

[0055] After the detection interface of the test fixture receives the deviation value input by the user and receives the start test button triggered by the user on the detection interface, the input current value of the proportional solenoid valve to be tested is adjusted according to the pre-set adjustment strategy, and the output pressure value of the proportional solenoid valve to be tested under the specified input current value is obtained;

[0056] The detection interface of the test tool displays a start test button;

[0057] The testing tool determines whether the proportional solenoid valve to be tested is qualified under the specified input current value based on the output pressure value of the proportional solenoid valve to be tested under the specified input current value, the pre-set standard pressure value corresponding to the specified input current value, and the deviation value, and obtains a first judgment result.

[0058] For example, in this embodiment, the hydraulic station provides high-pressure hydraulic oil; it is connected to the test fixture through a high-pressure oil pipe. A proportional solenoid valve to be tested is installed on the test fixture, such as a certain type of proportional pressure valve (such as the Danfoss PVG series). The user enters the deviation value through the detection interface, and then the user clicks the start test button, and the system starts to execute the test process. The system gradually increases the input current of the proportional solenoid valve from 0mA (0%) to 1000mA (100%) according to the adjustment strategy. When the input current is 200mA, 400mA and other specific points, the system collects the output pressure value, such as 50bar and 100bar. Compare the actual pressure value of each input current point with the preset standard pressure value. If it is within the deviation range of all points, the system determines that the proportional solenoid valve is qualified, otherwise it is unqualified. In this embodiment, the test operation from entering the deviation value to starting the test button is simple, and the subsequent process is automatically executed by the system without the need for manual recording and calculation.

[0059] Specifically, adjusting the input current value of the proportional solenoid valve to be tested according to a preset adjustment strategy specifically includes:

[0060] Starting from the 0% input current value of the proportional solenoid valve to be tested, the input current value is gradually increased until the input current value of 100% is reached.

[0061] For example, the preset adjustment strategy is: gradually increase the input current value from 0% to 100% and test 10 key data points.

[0062] The example setup is as follows:

[0063] Current range: 0mA (0%) to 1000mA (100%).

[0064] Adjustment step: Every 10% increase means 100mA increase per step.

[0065] The system starts inputting a current value from 0mA (0%) to operate the proportional solenoid valve.

[0066] The input current value gradually increases, and the key data points for collecting the output pressure value are:

[0067] 0mA (0%): The system collects the output pressure value and records it as 0 bar.

[0068] 100mA (10%): Collect the output pressure value and record it as 10bar.

[0069] 200mA (20%): Collect the output pressure value and record it as 25bar.

[0070] The test is completed when the input current reaches 1000mA (100%).

[0071] In this embodiment, the adjustment strategy is from 0% to 100% to ensure that the entire working range of the proportional solenoid valve is fully tested. Avoid test omissions and provide complete pressure response characteristic data. Segmented sampling (such as every 10% increase in input current value), pressure values are collected at key points, and the data is evenly distributed. The system automatically completes the process of gradually adjusting the input current without manual intervention. The pressure output characteristic data points under different input current values can be used to fit the pressure curve of the proportional solenoid valve. The input current range (such as 0mA~1000mA) and step size (such as 10% or other) can be adjusted according to needs.

[0072] Among them, the specified input current value includes: 0% input current value, 10% input current value, 20% input current value, 30% input current value, 40% input current value, 50% input current value, 60% input current value, 70% input current value, 80% input current value, 90% input current value, and 100% input current value.

[0073] It should be noted that, in this embodiment, an input current value of 0% indicates that the current input is zero, which is a state in which the proportional solenoid valve is completely unexcited. An input current value of 100% indicates that the current input reaches its maximum value, and the proportional solenoid valve is in a state of maximum excitation. During the test, the input current value from 0% to 100% is divided into multiple equally spaced points, such as a 10% step (i.e., an increase of 10% each time). These points are: 0% (minimum input), 10%, 20%, 30%...90%, 100% (maximum input); sampling is performed at each point (such as 0%, 10%, 20%), and the corresponding proportional solenoid valve output pressure value is recorded as test data.

[0074] For example, assuming the current range is 0mA to 1000mA, the corresponding input current values for each percentage are:

[0075] 0%: 0mA;

[0076] 10%: 100mA;

[0077] 20%: 200mA;

[0078] …

[0079] 100%: 1000mA;

[0080] At each current point (such as 100mA, 200mA, etc.), record the corresponding output pressure value, for example:

[0081] 0mA (0%): output pressure is 0bar;

[0082] 100mA (10%): output pressure is 5bar;

[0083] 200mA (20%): output pressure is 10bar;

[0084] …

[0085] 1000mA (100%): output pressure is 50bar;

[0086] The number of points can also be adjusted as needed (e.g., increasing the step size accuracy to 5% or decreasing it to 20%) to accommodate different testing requirements. Evenly distributed test points can more clearly reveal the operating characteristics of the proportional solenoid valve and how it changes over different input ranges.

[0087] In the actual application of this embodiment, the test tool determines whether the proportional solenoid valve to be tested is qualified at the specified input current value based on the output pressure value of the proportional solenoid valve to be tested at the specified input current value, the preset standard pressure value corresponding to the specified input current value, and the deviation value, and obtains a first judgment result, specifically including:

[0088] The test fixture obtains a first absolute value corresponding to the specified output current value based on the output pressure value of the proportional solenoid valve to be tested under the specified input current value and a preset standard pressure value corresponding to the specified input current value;

[0089] The first absolute value corresponding to the specified output current value is the absolute value between the output pressure value of the proportional solenoid valve to be tested under the specified input current value and the preset standard pressure value corresponding to the specified input current value;

[0090] According to the first absolute value corresponding to the specified output current value and the deviation value, it is judged whether the proportional solenoid valve to be tested is qualified under the specified input current value, and a first judgment result is obtained.

[0091] Specifically, at a specified input current value (e.g., 10%, 20%, etc.), the test fixture measures the actual output pressure of the proportional solenoid valve under test. For each specified input current value, a standard pressure value is pre-set. For example, the standard pressure for a 10% input current might be 10 bar. The first absolute value is calculated using the following formula:

[0092] First absolute value = |output pressure value-standard pressure value|

[0093] The absolute value here means that no matter whether the output pressure value is higher or lower than the standard pressure value, it is expressed as a positive value of the difference to ensure that the error can be quantified.

[0094] Compare the first absolute value to the deviation value entered by the user:

[0095] If the first absolute value ≤ the deviation value, the solenoid valve is determined to be qualified at this point.

[0096] Otherwise, the solenoid valve at this point is judged to be unqualified.

[0097] The result of this step is a qualified or unqualified judgment, which is used to evaluate the performance of the proportional solenoid valve to be tested.

[0098] For example, assume that the specified input current value is 20%; the actual output pressure value is 12 bar; the preset standard pressure value is 10 bar; and the user-entered deviation value is 3.

[0099] Calculation process:

[0100] Compute the first absolute value:

[0101] First absolute value = |12-10| = 2;

[0102] Comparison deviation value: Since 2≤3, the proportional solenoid valve is judged to be qualified at 20% input current.

[0103] In this embodiment, calculating the quantized error using absolute values allows for a more accurate measurement of the proportional solenoid valve's output performance, eliminating subjective judgment. This allows users to customize the deviation value, adapting the eligibility criteria to different application scenarios and improving the method's versatility. This provides a clear basis for determining eligibility, reducing uncertainty associated with human judgment and improving the reliability of test results.

[0104] Specifically, judging whether the proportional solenoid valve to be tested is qualified under the specified input current value according to the first absolute value corresponding to the specified output current value and the deviation value, and obtaining a first judgment result, specifically includes:

[0105] If the first absolute value corresponding to the specified output current value is greater than the deviation value, then a first judgment result is determined as that the proportional solenoid valve to be tested is unqualified under the specified input current value;

[0106] If the first absolute value corresponding to the specified output current value is less than or equal to the deviation value, it is determined that the first judgment result is that the proportional solenoid valve to be tested is qualified under the specified input current value.

[0107] In this embodiment, by setting specific thresholds (deviation values), judgments are made more objective and standardized, avoiding subjective errors. Direct logical comparisons are easy to automate, suitable for batch testing, and improve efficiency. Users can adjust the deviation value according to actual needs to meet the detection requirements of different scenarios.

[0108] The method further comprises:

[0109] The test fixture obtains a first fitting curve obtained when the start test button is triggered by the user this time, based on the output pressure value of the proportional solenoid valve to be tested under the specified input current value;

[0110] The first fitting curve is a curve obtained by fitting the output pressure values of the proportional solenoid valve to be tested under all specified input current values.

[0111] When the user triggers the start test button, the test fixture will gradually adjust the input current value according to the set input current value range (such as 0% to 100%, divided into multiple points).

[0112] The test fixture collects the corresponding solenoid valve output pressure value at each input current point. All collected input current and output pressure data points are fitted to form a curve describing the proportional solenoid valve's pressure characteristics. This curve is called the first fitted curve. The fitted curve is a mathematical representation of the relationship between the actual measurement points (input current and output pressure) generated using a specific algorithm (such as linear fitting, quadratic polynomial fitting, cubic spline fitting, etc.). This curve intuitively reflects the pressure variation trend of the solenoid valve over the entire input current range.

[0113] Compared to single-point data, a fitted curve can fully describe the pressure variation of a proportional solenoid valve. Furthermore, the fitted curve allows for a more intuitive observation of the solenoid valve's operating trends, making it easier to detect nonlinear behavior or anomalies.

[0114] In practical applications of this embodiment, the method further includes:

[0115] When the detection interface receives a detection button triggered by the user, judging whether the proportional solenoid valve to be tested is qualified according to the N first fitting curves obtained in advance and the second fitting curve obtained in advance, and obtaining a second judgment result;

[0116] The detection interface of the test tool displays a detection button;

[0117] The second fitting curve is a curve obtained by fitting pre-set standard pressure values corresponding to all specified input current values.

[0118] Wherein, judging whether the proportional solenoid valve to be tested is qualified based on the N first fitting curves obtained in advance and the second fitting curve obtained in advance, and obtaining a second judgment result specifically includes:

[0119] Determine whether the N pre-acquired first fitting curves and the pre-acquired second fitting curve meet a pre-set qualification condition, and if so, determine a second judgment result that the proportional solenoid valve to be tested is qualified;

[0120] The pre-set qualification condition is that the N first fitting curves obtained in advance and the second fitting curve obtained in advance satisfy formula (1) and formula (2);

[0121] Wherein, the formula (1) is:

[0122] max|y n (x)-y a (x)|≤θ;

[0123] θ is the deviation value entered by the user;

[0124] y n (x) is the value of the nth first fitting curve corresponding to the second fitting curve at the same abscissa point x in the same coordinate system;

[0125] y a (x) is the value of the second fitting curve corresponding to the nth first fitting curve among the N first fitting curves at the same abscissa point x in the same coordinate system as the second fitting curve;

[0126] The formula (2) is:

[0127] max|y n (x)-y t (x)|≤θ;

[0128] yt (x) is the value of the t-th first fitting curve corresponding to the same arbitrary abscissa point x of the N first fitting curves in the same coordinate system; wherein t≠n.

[0129] In this embodiment, during the testing process, when the test fixture receives a user-triggered "test button," the system evaluates the solenoid valve's performance based on multiple previously acquired first fitting curves. Previously, each time the user pressed the "Start Test" button, a corresponding first fitting curve was generated. The second fitting curve, obtained by fitting to a preset standard pressure value, is used to compare and verify the solenoid valve's performance.

[0130] N is greater than or equal to 8. In this embodiment, N=10.

[0131] The detection interface of the test fixture further displays a qualified indicator light and a failed indicator light corresponding to the first specified input current value respectively;

[0132] The first specified input current value includes: 10% input current value, 20% input current value, 30% input current value, 40% input current value, 50% input current value, 60% input current value, 70% input current value, 80% input current value, 90% input current value, and 100% input current value;

[0133] When the proportional solenoid valve to be tested is qualified at the first specified input current value, the qualified indicator light corresponding to the first specified input current value lights up;

[0134] When the proportional solenoid valve to be tested fails to meet the requirements at the first specified input current value, the failure indicator light corresponding to the first specified input current value lights up.

[0135] In this embodiment, the provision of pass and fail indicators intuitively informs the user of the solenoid valve's compliance at different input current values. This form of feedback allows for quick identification of the solenoid valve's performance status, eliminating the need for users to manually search for or compare complex test results. As the solenoid valve is being tested, the real-time display of pass and fail indicators helps the user monitor the test progress. Users no longer need to wait for the test to complete and view reports; they can now see the solenoid valve's compliance status at each step. This significantly improves testing efficiency and accuracy. The design of the indicator lights assists in determining the accuracy of test results. By observing the indicator light status, users can more clearly understand the solenoid valve's performance at different current inputs, allowing them to more accurately determine its compliance. Real-time feedback from the indicator lights facilitates quick decision-making, especially in complex testing environments. The indicator light status changes can serve as an auxiliary troubleshooting tool. If a solenoid valve consistently fails at a certain current value, the problem can be quickly identified and appropriate measures can be taken (such as inspecting the solenoid valve itself or adjusting the testing strategy), thereby reducing the risk of test delays or distorted results.

[0136] Example 2

[0137] This embodiment proposes a novel proportional solenoid valve testing method, designed to address the low detection efficiency, poor accuracy, and insufficient automation inherent in existing technologies. By introducing intelligent deviation value input and an automatic pressure value comparison mechanism, it enables accurate testing of the proportional solenoid valve's pressure response over the full range, from 0% to 100% input current, at multiple points. This method not only effectively evaluates the proportional solenoid valve's operating performance but also intuitively demonstrates its pressure characteristics at different input values, providing a powerful tool for production commissioning and quality control.

[0138] Before performing a performance test on a proportional solenoid valve, first ensure the consistency of all test conditions. This is the key to ensuring the comparability of the test results. The specific steps are as follows:

[0139] Ensure that the working environment temperature of the hydraulic station is stable, and that the pressure and oil specifications meet the test standards. Check that the material of the proportional solenoid valve is intact, and confirm that its power supply voltage is stable and meets the test requirements. The oil port size needs to be matched according to the specifications of the proportional solenoid valve to be tested to avoid test errors caused by improper interfaces. Install the proportional solenoid valve to be tested on a dedicated test fixture, tighten all connections to prevent leakage during the test. Turn on the hydraulic station, preheat to the operating temperature, adjust to the basic pressure setting value, and circulate the oil circuit to eliminate bubbles and impurities to ensure that the oil is clean. After all hardware conditions are ready, turn on the proportional valve automatic adjustment button on the test fixture. At this time, the system automatically loads the test program and enters the test interface (such as Figure 2The test interface should clearly display various parameter setting options and the test process to be performed to ensure that the operator has a full understanding of the upcoming test.

[0140] Once the test interface is ready, the specific test process of a new proportional solenoid valve test method in this embodiment can be started. The detailed steps are as follows:

[0141] Step 1: In the detection interface (such as Figure 2 Enter the desired deviation value in the designated area (as shown). The deviation value is set based on the user's actual application scenario to simulate control requirements under different operating conditions. Operators should carefully select the appropriate deviation value range based on the product specifications or customer requirements.

[0142] Step 2: After completing the input, click the Start Test button to enter the automatic test mode. At this point, the test indicator lights up, indicating that the test has officially started. The system begins to gradually adjust the input current value of the proportional solenoid valve according to the predetermined program and measures the pressure value at the corresponding current value (0%, 10%...90%, 100%).

[0143] Step 3: As the test progresses, the current pressure setting display box on the interface will update in real time, showing the pressure setting value at the current test point. When the current reaches 100%, the system automatically analyzes and compares the pressure value at each point with the preset standard. The 20 LED indicators on the interface clearly indicate the pass status of each test point: if the indicator lights up, the point passes; otherwise, it fails. This design allows operators to quickly understand the proportional valve's performance without in-depth data interpretation.

[0144] In this embodiment, when performing a proportional valve pressure test, the number of tests for each proportional solenoid valve to be tested is set to N times. If the second fitting curve and the first fitting curve drawn by the pressure of each test meet the pre-set qualification conditions, it means that the proportional solenoid valve to be tested has passed the test.

[0145] This embodiment can automatically detect the pressure corresponding to each input current value of the proportional valve, eliminating the tedious operation of the worker. The principle is as follows:

[0146] First, record the voltage corresponding to each input current value. Then, set the code to automatically input the corresponding voltage. Set the input interval to 5 seconds. This way, the proportional valve will input the next current value every 5 seconds and record the corresponding pressure value at that input current value.

[0147] The corresponding pressure value under the valve port is transmitted to the variable of the vertical axis in the curve drawing box of the interface, as well as the function interface of the data table (such as Figure 3The proportional valve test pressure variable in the data table function records the pressure value corresponding to different input current values in each test. It can be exported in the data table function interface to facilitate further analysis. When further analysis of the recorded data is required, click the Export Data button in the data table function interface to download the data.

[0148] In this embodiment, a program automatically calculates and compares the results, reducing manual intervention and improving detection efficiency and accuracy. It covers 10 critical pressure points for proportional solenoid valves, ranging from 0% to 100% input current, ensuring a comprehensive assessment of their operating characteristics. Twenty indicator lights visually display the pass / fail status of each test point, allowing operators to quickly identify problems. Specific numerical values can be entered to plot output curves, providing a deeper understanding of the dynamic response characteristics of proportional solenoid valves. This method is applicable to proportional solenoid valves of varying materials, supply voltages, and port sizes, enhancing its versatility.

[0149] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0150] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0151] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0152] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic 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 one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0153] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for detecting the pressure characteristics of a proportional solenoid valve, characterized in that: The method is performed by a system for detecting pressure characteristics of a proportional solenoid valve, the system comprising a hydraulic station and a test fixture connected via a high-pressure oil pipe, wherein the test fixture is mounted with the proportional solenoid valve to be tested; the method comprises: After the detection interface of the test fixture receives the deviation value input by the user and receives the start test button triggered by the user on the detection interface, the input current value of the proportional solenoid valve to be tested is adjusted according to the pre-set adjustment strategy, and the output pressure value of the proportional solenoid valve to be tested under the specified input current value is obtained; The detection interface of the test tool displays a start test button; The testing tool determines whether the proportional solenoid valve to be tested is qualified under the specified input current value based on the output pressure value of the proportional solenoid valve to be tested under the specified input current value, the pre-set standard pressure value corresponding to the specified input current value, and the deviation value, and obtains a first judgment result.

2. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 1, wherein: Adjusting the input current value of the proportional solenoid valve to be tested according to the pre-set adjustment strategy specifically includes: Starting from the 0% input current value of the proportional solenoid valve to be tested, the input current value is gradually increased until the input current value of 100% is reached.

3. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 2, wherein: in, The specified input current value includes: 0% input current value, 10% input current value, 20% input current value, 30% input current value, 40% input current value, 50% input current value, 60% input current value, 70% input current value, 80% input current value, 90% input current value, and 100% input current value.

4. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 3, wherein: The test tool determines whether the proportional solenoid valve to be tested is qualified at the specified input current value based on the output pressure value of the proportional solenoid valve to be tested at the specified input current value, the preset standard pressure value corresponding to the specified input current value, and the deviation value, and obtains a first judgment result, specifically including: The test fixture obtains a first absolute value corresponding to the specified output current value based on the output pressure value of the proportional solenoid valve to be tested under the specified input current value and a preset standard pressure value corresponding to the specified input current value; The first absolute value corresponding to the specified output current value is the absolute value between the output pressure value of the proportional solenoid valve to be tested under the specified input current value and the preset standard pressure value corresponding to the specified input current value; According to the first absolute value corresponding to the specified output current value and the deviation value, it is judged whether the proportional solenoid valve to be tested is qualified under the specified input current value, and a first judgment result is obtained.

5. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 4, characterized in that: Determining whether the proportional solenoid valve to be tested is qualified under the specified input current value according to the first absolute value corresponding to the specified output current value and the deviation value, and obtaining a first judgment result, specifically includes: If the first absolute value corresponding to the specified output current value is greater than the deviation value, then a first judgment result is determined as that the proportional solenoid valve to be tested is unqualified under the specified input current value; If the first absolute value corresponding to the specified output current value is less than or equal to the deviation value, it is determined that the first judgment result is that the proportional solenoid valve to be tested is qualified under the specified input current value.

6. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 5, characterized in that: The method further comprises: The test fixture obtains a first fitting curve obtained when the start test button is triggered by the user this time, based on the output pressure value of the proportional solenoid valve to be tested under the specified input current value; The first fitting curve is a curve obtained by fitting the output pressure values of the proportional solenoid valve to be tested under all specified input current values.

7. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 6, characterized in that: The method further comprises: When the detection interface receives a detection button triggered by the user, judging whether the proportional solenoid valve to be tested is qualified according to the N first fitting curves obtained in advance and the second fitting curve obtained in advance, and obtaining a second judgment result; The detection interface of the test tool displays a detection button; The second fitting curve is a curve obtained by fitting pre-set standard pressure values corresponding to all specified input current values.

8. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 7, characterized in that: Determining whether the proportional solenoid valve to be tested is qualified based on the N first fitting curves obtained in advance and the second fitting curve obtained in advance, and obtaining a second judgment result, specifically including: Determine whether the N pre-acquired first fitting curves and the pre-acquired second fitting curve meet a pre-set qualification condition, and if so, determine a second judgment result that the proportional solenoid valve to be tested is qualified; The pre-set qualification condition is that the N first fitting curves obtained in advance and the second fitting curve obtained in advance satisfy formula (1) and formula (2); Wherein, the formula (1) is: max|y n (x)-y a (x)|≤θ; θ is the deviation value entered by the user; y n (x) is the value of the nth first fitting curve corresponding to the second fitting curve at the same abscissa point x in the same coordinate system; y a (x) is the value of the second fitting curve corresponding to the nth first fitting curve among the N first fitting curves at the same abscissa point x in the same coordinate system as the second fitting curve; The formula (2) is: max|y n (x)-y t (x)|≤θ; y t (x) is the value of the t-th first fitting curve corresponding to the same arbitrary abscissa point x of the N first fitting curves in the same coordinate system; wherein t≠n.

9. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 8, wherein: N is greater than or equal to 8.

10. The method for detecting pressure characteristics of a proportional solenoid valve according to claim 9, wherein: The detection interface of the test fixture further displays a pass indicator light and a fail indicator light corresponding to the first specified input current value respectively; The first specified input current value includes: 10% input current value, 20% input current value, 30% input current value, 40% input current value, 50% input current value, 60% input current value, 70% input current value, 80% input current value, 90% input current value, and 100% input current value; When the proportional solenoid valve to be tested is qualified at the first specified input current value, the qualified indicator light corresponding to the first specified input current value lights up; When the proportional solenoid valve to be tested fails to meet the requirements at the first specified input current value, the failure indicator light corresponding to the first specified input current value lights up.

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