Device and method for testing characteristics of track control rotary valve

Abstract

The invention belongs to the technical field of agricultural irrigation, and provides a device and method for testing characteristics of a track control rotary valve, and the device comprises a power supply unit which consists of a variable frequency water pump, a water supply pipe and a water tank and is used for supplying water to the valve and driving a valve core to move up and down; the plurality of water outlet pipes are connected with different water outlets of the valve; the multi-dimensional monitoring unit comprises a first pressure sensor arranged on the water supply pipe, and a second pressure sensor and a flow sensor corresponding to each water outlet pipe; and the controller is in communication connection with all the sensors and the water pump to realize data acquisition and cooperative control. Through the scheme, the pressure, the flow and the on-off state of the valve under different water pressures can be obtained in real time, automatic testing and judgment of dynamic performance are completed, the testing precision and efficiency are improved, and the method is suitable for performance verification and optimization of the hydraulic drive valve in the fields of agricultural irrigation and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of agricultural irrigation technology, and provides a testing device and method for track control rotary valve characteristics. BACKGROUND

[0002] In the scenarios of agricultural irrigation, garden sprinkling irrigation, etc., the track control rotary valve driven by water force gradually becomes an important part of the automatic irrigation system due to its characteristics of not needing external power supply, simple structure, strong adaptability, etc. The valve drives the valve core to lift and rotate through the water flow pressure to realize the sequential switching of multiple water outlets, and is widely used in the control of zoned wheel irrigation in non-electric or weak electric environments.

[0003] However, the current automatic irrigation system device in the field is designed based on electric or pneumatic valves, and takes electronic information technology as the core. The irrigation instruction remote transmission is realized through the integration of communication technology and electric control technology. The core control valve is mainly an electric ball valve and an electromagnetic valve. The former relies on a motor to drive the valve core to rotate, and the latter changes the flow passage by attracting the valve core through an electromagnetic coil. Both of them need to deploy a stable power supply system in the field, and the existing testing device is mainly designed around the electric / gas driven valve, focusing on the electric signal feedback and motor response characteristics, and is difficult to be applied to non-electric control valves driven by water pressure. SUMMARY

[0004] In order to solve the above technical problems, the application provides a testing device and method for track control rotary valve characteristics, which can detect the track control rotary valve through pressure difference and water flow.

[0005] The technical scheme of the application comprises: A power supply unit comprising a variable frequency water pump, a water supply pipe and a water tank. The variable frequency water pump delivers water in the water tank to the valve through the water supply pipe to impact the valve core and make it displace along the height direction. A plurality of water outlet pipes connected with the valve water outlets respectively. A multi-dimensional monitoring unit comprising a first pressure sensor, a plurality of second pressure sensors and a plurality of flow sensors. The first pressure sensor is arranged in the water supply pipe, and the plurality of second pressure sensors and flow sensors are one-to-one correspondingly arranged on the water outlet pipes. A controller in communication connection with the variable frequency water pump, the first pressure sensor, the plurality of second pressure sensors and the plurality of flow sensors.

[0006] Further, a plurality of high-speed cameras are arranged on the transparent section of the water outlet pipe. The plurality of high-speed cameras are one-to-one correspondingly arranged on one side of the transparent section, and the high-speed cameras shoot the water flow pattern in the water outlet pipe through the transparent section. The plurality of high-speed cameras are in communication connection with the controller.

[0007] Further, the multi-dimension monitoring unit further comprises a laser displacement sensor, which is located in the valve and directly above the valve core, and is configured to detect the vertical displacement of the valve core.

[0008] The application further provides a method for testing the characteristics of a track control wheel valve, which comprises the following steps: The variable frequency water pump is started to deliver water in the water tank to the valve, so that the water impacts the valve core.

[0009] After the water outlet of the valve is connected to one of the water outlets of the valve, the first pressure sensor monitors the water supply pressure in the water supply pipe, and the second pressure sensor monitors the water outlet pressure in the water supply pipe.

[0010] When the pressure difference between the water supply pressure and the water outlet pressure is stable and within a pressure difference threshold range, the flow sensor monitors the water outlet flow of the water outlet pipe.

[0011] A monitoring curve is drawn according to the pressure difference and the water outlet flow, and the monitoring curve is compared with a standard curve, and when the monitoring curve is within the error range of the standard curve, it is determined that the valve is normal, otherwise it is determined that the valve is abnormal.

[0012] Further, the water supply pressure when the valve core starts to displace is monitored, and the controller records the water supply pressure at this time as an opening threshold. When the opening threshold is within the error range of the standard threshold, it is determined that the valve is normal, otherwise it is determined that the valve is abnormal.

[0013] Further, the error is within 3%.

[0014] Further, when the pressure difference between the water supply pressure and the water outlet pressure is stable and within a pressure difference threshold range, it is determined that the valve is normal, otherwise it is determined that the valve is abnormal.

[0015] Further, the pressure difference threshold is 20KPa-200KPa.

[0016] The technical scheme provided by the application has the following advantages compared with the prior art: By setting the power supply unit composed of a variable frequency water pump, a water tank and a water supply pipe, the input water pressure can be accurately adjusted, so as to simulate the driving effect of the valve core under different working conditions; by arranging the first pressure sensor, the plurality of second pressure sensors and the flow sensor, the water inlet pressure, the water outlet pressure and the flow can be synchronously collected, and the controller is combined to form a closed loop control, so as to solve the problems of isolated parameters and difficult to reproduce in the traditional test; the plurality of water outlets are connected by the plurality of water outlet pipes, the multi-channel sequential rotation test is supported, and the test efficiency and the applicability are improved. Therefore, the application realizes comprehensive and automatic evaluation of key performances such as opening and closing sensitivity, flow capacity and response consistency of the track control rotating valve, and significantly improves the test precision and reliability.

[0017] Other advantages, objects, and features of the application will be understood by those skilled in the art from the following description, and will be appreciated when the application is put into practice. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 The figure is a schematic diagram of the overall structure of the embodiment of the present application.

[0020] Figure 2 The figure is Figure 1 The enlarged view of A in the figure.

[0021] Reference signs: 1, variable frequency water pump; 2, water supply pipe; 3, water tank; 4, valve; 5, water outlet pipe; 6, first pressure sensor; 7, second pressure sensor; 8, flow sensor; 9, high-speed camera; 10, transparent section. DETAILED DESCRIPTION

[0022] The specific embodiments of the present application will be described in detail below with reference to the drawings, but it should be understood that the protection scope of the present application is not limited by the specific embodiments.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the technical solutions of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application.

[0024] In the description of the embodiments of the present application, "a plurality of" means two or more, unless otherwise specified.

[0025] In the description of the embodiments of the present application, the track control rotary valve is a hydraulic drive type non-electric control valve specially designed for agricultural irrigation, the core of which drives the valve core to move through the change of water flow pressure, realizes the automatic rotation switching of multi-directional water outlets, and does not need to rely on power supply or solar power supply. The track control rotary valve belongs to the prior art, and the present application will not be described in detail.

[0026] As shown in Figure 1 and Figure 2 The present application provides a test device for the characteristics of a track control rotary valve 4, comprising: A power supply unit comprising a variable frequency water pump 1, a water supply pipe 2 and a water tank 3, the variable frequency water pump 1 conveying water in the water tank 3 to the valve 4 through the water supply pipe 2 to impact the valve core and make it displace along the height direction.

[0027] A plurality of water outlets 5 are connected with the water outlets of the valve 4 respectively.

[0028] A multi-dimensional monitoring unit comprising a first pressure sensor 6, a plurality of second pressure sensors 7 and a plurality of flow sensors 8, the first pressure sensor 6 being arranged in the water supply pipe 2, and the plurality of second pressure sensors 7 and flow sensors 8 being arranged on the water outlets 5 one by one respectively.

[0029] A controller in communication connection with the variable frequency water pump 1, the first pressure sensor 6, the plurality of second pressure sensors 7 and the plurality of flow sensors 8 respectively.

[0030] By constructing a closed-loop system composed of power supply, multi-channel output, multi-dimensional sensing and monitoring, and intelligent control, a comprehensive characterization of the dynamic working characteristics of the track-controlled rotating valve 4 under hydraulic drive was achieved. The power supply unit provides a stable and adjustable water pressure source for the valve 4 under test. The variable frequency pump 1 can adjust its speed according to a preset program, thereby precisely controlling the water supply pressure and flow rate. The water tank 3 stores the test water to ensure continuous water supply. The water supply pipe 2 serves as a connecting channel, delivering the water output from the pump to the inlet of the valve 4. Through the continuous impact of the water flow on the valve core, the opening and closing driving force under real working conditions is simulated, causing the valve core to overcome its own weight and sealing resistance and displace vertically, thus triggering the rotating action.

[0031] Multiple outlet pipes 5 are connected to multiple outlets of valve 4, supporting multi-channel parallel testing and suitable for rotary valve structures with two or more horizontal outlets. Each outlet pipe 5 is led out independently, facilitating the subsequent installation of sensor components and enabling independent acquisition of parameters for each outlet path. This design allows the testing process to cover all outlet modes, avoiding data deviations caused by single-channel testing and improving the representativeness and completeness of the test results.

[0032] The multi-dimensional monitoring unit integrates various types of sensors to synchronously collect key hydraulic parameters. The first pressure sensor 6 is located inside the water supply pipe 2, near the inlet of valve 4, to monitor the water supply pressure before it enters valve 4 in real time, reflecting the intensity of the input excitation. Multiple second pressure sensors 7 are installed on each outlet pipe 5, respectively monitoring the pressure state at each outlet. Combined with the data from the first pressure sensor 6, the pressure loss and flow resistance of different channels can be calculated. Multiple flow sensors 8 are also correspondingly deployed on each outlet pipe 5 to measure the actual outflow rate at each outlet, evaluating the flow capacity of valve 4 under different opening states. All sensors possess high precision and fast response characteristics, with a sampling frequency of no less than 100Hz, ensuring data capture capabilities for transient processes (such as the instant of opening and the subsequent drop-off upon closing).

[0033] As the central unit of the system, the controller adopts a programmable logic controller (PLC) or an industrial-grade embedded control system. It features multiple communication interfaces, enabling stable communication with the variable frequency water pump 1, various pressure sensors, and flow sensors 8. The controller not only receives real-time data from each sensor but also controls the operating state of the variable frequency water pump 1 according to preset logic, such as starting pressure boosting, maintaining stable pressure, and reducing pressure to trigger shutdown, forming a closed-loop control mechanism of "sensing-judgment-regulation." Simultaneously, the controller has a built-in data storage unit that can timestamp and save the pressure and flow time-series data throughout the test process for subsequent analysis.

[0034] The components are physically connected and functionally coupled through pipelines, electrical wiring, and mechanical supports: the outlet of water tank 3 is connected to the inlet of variable frequency water pump 1 via water supply pipe 2, and the outlet of the water pump is connected to the extension of water supply pipe 2, ultimately connecting to the top inlet of the valve 4 under test; multiple outlets are provided on the bottom or side of valve 4, each led out through an independent outlet pipe 5; a second pressure sensor 7 and a flow sensor 8 are connected in series on each outlet pipe 5, and the end can be connected to a return water system to form a closed loop; all sensors transmit signals to the controller through shielded cables; the controller controls the start, stop, and speed adjustment of the water pump through a relay or frequency converter interface. The entire device can be expanded to more monitoring points through standardized interfaces and can also be adapted to different types and sizes of track-controlled rotary valves, possessing good versatility and reconfigurability.

[0035] It effectively solves the technical problem of lacking automated, multi-parameter, and high-precision testing methods in existing technologies. It is particularly suitable for dynamic performance evaluation of non-electrically driven rotary valves under non-stop water supply conditions, meeting the testing needs of high-performance, low-cost control components in the field of agricultural water-saving irrigation.

[0036] In the embodiments provided by the present invention, a plurality of high-speed cameras 9 are also included, and a transparent section 10 is provided on the water outlet pipe 5; the plurality of high-speed cameras 9 are arranged one-to-one on one side of the transparent section 10, and the high-speed cameras 9 capture the water flow pattern in the water outlet pipe 5 through the transparent section 10; the plurality of high-speed cameras 9 are all communicatively connected to the controller.

[0037] High-speed camera 9 captures the water flow pattern inside water pipe 5 through transparent section 10, specifically recording the flow patterns of water under different pressure conditions, such as full-pipe flow, half-pipe flow, laminar flow, turbulent flow, jet flow, or cavitation. By analyzing the video sequence frame by frame, it is possible to determine whether there are abnormal conditions such as flow deviation, blockage, air entrapment, or unstable flow, thereby assisting in diagnosing problems such as whether valve 4 is switching properly, whether the seal is intact, and whether the passage is unobstructed. Especially when the flow sensor 8 reading is abnormal, combining the high-speed camera image can effectively distinguish between actual flow deviation and sensor malfunction, avoiding misjudgment.

[0038] In the embodiments provided by the present invention, the multi-dimensional monitoring unit further includes a laser displacement sensor, which is located inside the valve 4 and directly above the valve core. The laser displacement sensor is used to detect the vertical displacement of the valve core and is communicatively connected to the controller.

[0039] A laser displacement sensor enables non-contact, high-precision dynamic monitoring of the movement of the valve core inside the track-controlled rotary valve 4. This technology addresses the challenge of accurately capturing the actual dynamic displacement of the valve core using traditional testing methods, particularly addressing issues such as response delays, fluctuations in opening height, and unstable reseating during opening and closing. Relying solely on inlet and outlet pressure and flow data cannot fully reflect the valve's true operational behavior. Since the valve core is the core actuator in hydraulic actuation, its displacement characteristics directly determine the valve 4's on / off performance and switching accuracy. Therefore, establishing real-time quantitative monitoring capabilities for its vertical movement is crucial for improving the accuracy of the testing system's evaluation.

[0040] This invention also provides a test method for the characteristics of a track control wheel valve, characterized in that it includes: Turn on the variable frequency water pump 1 to deliver water from the water tank 3 to the valve 4, causing the water to impact the valve core.

[0041] The variable frequency water pump 1 is started, continuously supplying water from the water tank 3 to the inlet of the rotary valve under test through the water supply pipe 2. Under pressure, the water flows into the valve 4, applying upward fluid force to the valve core, overcoming its own weight and sealing resistance, and driving the valve core to move vertically. This process simulates the water pressure-driven opening and closing behavior in actual irrigation conditions, ensuring that the test conditions are consistent with the real operating environment. The variable frequency water pump 1 can adjust the output flow rate and pressure according to a preset program to accurately reproduce different hydraulic conditions.

[0042] After the outlet of valve 4 is connected to one of the outlets of valve 4, the first pressure sensor 6 monitors the water supply pressure in the water supply pipe 2, and the second pressure sensor 7 monitors the water outlet pressure in the water supply pipe 2.

[0043] "When the outlet of valve 4 is connected to one of the outlets of valve 4" means that when the valve core rises and rotates to the predetermined position, its internal channel connects with a certain horizontal outlet, forming a conductive path, and water begins to flow out from that outlet. At this time, the system enters the effective testing phase. The first pressure sensor 6 is installed on the water supply pipe 2 near the inlet of valve 4 to collect the water supply pressure value in real time, reflecting the dynamic changes in the driving water pressure; multiple second pressure sensors 7 are installed on each outlet pipe 5 to monitor the outlet pressure of their respective branches. The two sets of pressure data together form the basis for the pressure difference calculation, providing a basis for subsequent steady-state judgment.

[0044] When the pressure difference between the supply water pressure and the outlet water pressure is stable and within the pressure difference threshold range, the flow sensor 8 monitors the outlet water flow rate of the outlet water pipe 5.

[0045] The controller receives real-time signals from the first and second pressure sensors 7 and continuously calculates the difference between the supply water pressure and the corresponding outlet water pressure. When this pressure difference fluctuates less than a set tolerance (e.g., ±5 kPa / s) over a continuous time period and remains within a preset pressure difference threshold range (e.g., 20 kPa–200 kPa), the system is determined to have entered a steady-state flow state. At this time, the flow sensor 8 on the corresponding outlet pipe 5 is triggered to start sampling and record the instantaneous flow data of the current outlet. This mechanism avoids collecting non-representative data during start-up / shutdown transients or periods of severe pressure fluctuations, improving the accuracy and comparability of test results.

[0046] A monitoring curve is plotted based on the pressure difference and the outflow rate. The monitoring curve is compared with the standard curve. If the monitoring curve is within the error range of the standard curve, valve 4 is considered normal; otherwise, valve 4 is considered abnormal.

[0047] The controller or host computer system constructs a "pressure difference – flow rate" relationship curve, i.e., a monitoring curve, based on the collected pressure difference and effluent flow rate data. This curve characterizes the flow characteristics of valve 4 under specific operating conditions, reflecting its opening and closing sensitivity, flow resistance performance, and response consistency. The standard curve is an ideal performance curve generated based on design parameters, theoretical models, or statistical analysis of historical qualified samples, and is stored in the control system database. The two are compared point-by-point or segment-by-segment. If the overall deviation of the monitoring curve does not exceed the preset error range (e.g., ±3%), the performance of the tested valve 4 is considered to meet the requirements and is judged as "normal"; otherwise, it is marked as "abnormal," indicating possible structural defects, wear, jamming, or improper assembly.

[0048] This system enables standardized and quantitative evaluation of key performance parameters of hydraulically driven track-controlled rotary valves without relying on external power. By using stable pressure difference as a prerequisite for flow sampling, the system eliminates the influence of transient disturbances, ensuring data accuracy. The introduction of a graphical curve comparison mechanism overcomes the limitations of traditional single-point measurements in comprehensively evaluating valve dynamic characteristics, achieving a comprehensive judgment from local parameters to overall behavior. Furthermore, the integration of a multi-sensor collaborative working mode allows for the simultaneous acquisition and correlation analysis of information such as pressure, flow rate, and on / off status, improving fault identification capabilities. Therefore, it achieves the technical effects of improved testing accuracy, enhanced judgment reliability, and support for batch testing and product optimization, making it suitable for quality control and performance verification of rotary valves in non-electrical environments in agricultural irrigation.

[0049] In the embodiments provided by the present invention, the water supply pressure when the valve core begins to displace during water supply is monitored, and the controller records the water supply pressure at this time as the opening threshold; when the opening threshold is within the error range of the standard threshold, the valve 4 is judged to be normal, otherwise the valve 4 is judged to be abnormal.

[0050] "Monitoring the water supply pressure at which the valve core begins to displace during water supply" refers to the process of acquiring real-time water pressure changes in the water supply pipe 2 using a high-precision pressure sensor during testing, and simultaneously combining this with dynamic detection of the valve core position using a laser displacement sensor. This captures the water supply pressure value corresponding to the critical point at which the valve core transitions from a static state (fully closed) to the point of initial vertical displacement. This pressure value reflects the pressure threshold required for valve 4 to overcome internal friction, sealing resistance, and the valve core's own weight, and is one of the key indicators for measuring the opening and closing sensitivity of valve 4. The pressure sensor used to achieve this function can be a piezoresistive or capacitive micro-differential pressure sensor, installed on the water supply pipe 2 section between the variable frequency water pump 1 and the valve 4 inlet, ensuring that the measured pressure is the actual dynamic pressure acting upstream of the valve core.

[0051] "The controller records the current water supply pressure as the activation threshold" means that the control system receives data streams from the first pressure sensor 6 and the laser displacement sensor in a time-synchronized manner, sets a displacement trigger threshold (e.g., ≥0.1mm), and once the laser displacement signal is detected to exceed this threshold, the pressure sampling value corresponding to the current moment is locked and marked as the activation pressure threshold for this cycle. The controller uses a PLC or industrial-grade embedded system with high-speed data acquisition capabilities and a built-in filtering algorithm to eliminate transient fluctuation interference, ensuring the stability and repeatability of the recorded results. The activation threshold can be stored in a local database, supporting comparative analysis of multiple rounds of test data, and can also be uploaded to a host computer via a communication interface for trend statistics.

[0052] The standard threshold, defined as "valve 4 is considered normal if the opening threshold is within the error range of the standard threshold, otherwise it is considered abnormal," refers to a pre-set ideal opening pressure range determined based on design parameters or the average value of historical qualified samples. For example, the standard opening pressure of a certain model of track control rotary valve is 90 kPa ± 3%, i.e., 87.3–92.7 kPa. If the measured opening threshold falls within this range, the response characteristics of valve 4 are considered to meet expectations, with no issues such as jamming, aging, or excessively tight assembly. If it exceeds this range, it indicates potential faults such as seal deformation, wear of moving parts, or abnormal structural clearances, requiring repair or replacement. This judgment process is automatically completed by the controller without manual intervention, improving testing efficiency and objectivity.

[0053] This solves the problems of delayed response and high misjudgment rate caused by traditional testing methods that rely on visual observation or steady-state flow judgment. Therefore, it achieves the technical effect of improving the accuracy of valve 4 performance evaluation and enhancing the early warning capability of faults, effectively supporting the reliability verification needs of hydraulically driven valve 4 in agricultural irrigation systems under non-electrical conditions.

[0054] In the embodiments provided by the present invention, when the pressure difference between the supply water pressure and the outlet water pressure is stable and not within the pressure difference threshold range, valve 4 is judged to be normal; otherwise, valve 4 is judged to be abnormal.

[0055] It should be noted that any parts not disclosed or specifically described in this invention are existing technology or conventional configurations, and their specific structures and working principles will not be elaborated further. In this document, 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 that element.

[0056] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A testing device for the characteristics of a track control wheel valve, characterized in that, include: The power supply unit includes a variable frequency water pump, a water supply pipe and a water tank. The variable frequency water pump delivers water from the water tank to the valve through the water supply pipe to impact the valve core and cause it to move along the height direction. Multiple water outlet pipes are connected to the valve outlets respectively; The multi-dimensional monitoring unit includes a first pressure sensor, multiple second pressure sensors, and multiple flow sensors. The first pressure sensor is installed inside the water supply pipe, and the multiple second pressure sensors and flow sensors are respectively installed on the water outlet pipe. The controller is communicatively connected to the variable frequency water pump, the first pressure sensor, multiple second pressure sensors, and multiple flow sensors.

2. The testing device for the characteristics of a track control wheel valve as described in claim 1, characterized in that, It also includes multiple high-speed cameras, and the water outlet pipe is equipped with a transparent section; Multiple high-speed cameras are arranged one-to-one on one side of the transparent section, and the high-speed cameras capture the water flow pattern inside the water pipe through the transparent section; All of the high-speed cameras are communicatively connected to the controller.

3. The testing device for the characteristics of a track control wheel valve as described in claim 2, characterized in that, The multi-dimensional monitoring unit also includes a laser displacement sensor, which is located inside the valve and directly above the valve core. The laser displacement sensor is used to detect the vertical displacement of the valve core and is communicatively connected to the controller.

4. A method for testing the characteristics of a track control wheel valve, using the testing apparatus for testing the characteristics of a track control wheel valve as described in claim 3, characterized in that, include: Turn on the variable frequency water pump to deliver water from the water tank to the valve, causing the water to impact the valve core; After the outlet of the valve is connected to one of the outlets of the valve, the first pressure sensor monitors the water supply pressure in the water supply pipe, and the second pressure sensor monitors the water outlet pressure in the water supply pipe. When the pressure difference between the supply water pressure and the outlet water pressure is stable and within the pressure difference threshold range, the flow sensor monitors the outlet water flow rate of the outlet pipe. A monitoring curve is plotted based on the pressure difference and the outflow rate. The monitoring curve is then compared with a standard curve. If the monitoring curve is within the error range of the standard curve, the valve is considered normal; otherwise, the valve is considered abnormal.

5. A test method for the characteristics of a track control wheel valve as described in claim 4, characterized in that, The controller monitors the water supply pressure when the valve core begins to move during water supply and records the water supply pressure at this time as the opening threshold. When the opening threshold is within the error range of the standard threshold, the valve is considered normal; otherwise, the valve is considered abnormal.

6. The test method for the characteristics of a track control wheel valve as described in claim 5, characterized in that, The error is within 3%.

7. The test method for the characteristics of a track control wheel valve as described in claim 4, characterized in that, When the pressure difference between the supply water pressure and the outlet water pressure is stable and within the pressure difference threshold range, the valve is considered to be normal; otherwise, the valve is considered to be abnormal.

8. A test method for the characteristics of a track control wheel valve as described in claim 7, characterized in that, The pressure difference threshold is 20 kPa-200 kPa.

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