Control method of self-circulation drip irrigation system for indoor landscape

Abstract

The invention discloses a control method of a self-circulation drip irrigation system for indoor landscapes, which relates to the technical field of indoor irrigation control, and comprises the following steps of: executing active integrity self-inspection before irrigation: opening a normally-closed failure safety valve of a main pipe in a short time when a partition valve is closed, and driving a circulating pump to perform micro-pulse; collecting flow attenuation of the main pipe and liquid level stability of the main circulating box after the pump is stopped, and locking the machine if abnormal; irrigation is conducted after self-inspection is passed, the liquid supply volume is obtained according to the flow of a main pipe, the liquid level of a main circulation box is converted into box body volume change, the consistency difference value is calculated and compared with the short-time retention upper bound, and hard cutting is conducted if the consistency difference value exceeds the limit; during operation, a secondary safe liquid collecting cavity is triggered, conservation verification failure and flow abnormity are treated in a grading manner, and soft stop rechecking and locking are supported; and after locking, manual resetting is carried out, and fault positioning and learning mode updating are carried out, and a short-time retention upper bound and a partition flow window are output. According to the method, the water running stop loss certainty is improved, the false alarm and operation and maintenance cost is reduced, and maintenance is more convenient.

Description

Technical Field

[0001] This invention relates to the field of indoor irrigation control technology, specifically a control method for a self-circulating drip irrigation system for indoor landscapes. Background Technology

[0002] With the widespread application of indoor greening, landscape walls, plant display cases, and soft furnishings in commercial spaces, a wide range of indoor landscape systems are being installed in residential living rooms, office reception areas, hotel lobbies, and shopping mall atriums. To reduce manual watering and increase water consumption, indoor landscape irrigation typically employs a self-circulating drip irrigation system. Liquid is supplied from a storage tank / circulation tank, then pumped through pipes and valves to the drippers or drip irrigation pipes, slowly supplying water to the substrate or roots. Excess water is collected in a collection tray and returned to the water tank. These systems generally require large volume, low noise, and concealed piping. Drippers and branch pipes are often located within decorative back panels and planting troughs, making effective monitoring and maintenance difficult. They are typically placed close to wood flooring, stone, wall coverings, and electrical cabinets, resulting in unattended or infrequently inspected conditions. In the existing technology, the method adopted is to install a water pump, filter, check valve and solenoid valve on the liquid supply side, and liquid level detection and water replenishment / drainage structure on the water tank side, and start and stop by timed or humidity control, and set simple alarm when necessary to realize circulating water supply and recycling.

[0003] The above structures generally meet irrigation requirements. However, under indoor low-flow drip irrigation conditions, the water path is affected by transient start-stop cycles and air bubble entrainment, delayed recovery and return flow, slope, return water resistance, and liquid level differences. Short-term substrate adsorption and pipeline volume retention cause the water tank level change to not be completely consistent with the supply volume. Simultaneously, filtration attenuation, nutrient solution deposition, or dripper blockage alters the local resistance distribution, resulting in a non-linear pressure-flow relationship or intermittent backflow. Therefore, when abnormalities such as hose aging, valve leaks, joint leaks, or siphon residual flow after pump shutdown occur, leaked water will accumulate along the bottom of the equipment and the ground through the recovery path, seeping into the baseboard or walls along the joints, and even into the space below, causing dampness, mold, decreased insulation performance, property damage, and downtime for maintenance.

[0004] Therefore, in indoor application scenarios where low-flow drip irrigation, delayed recovery, and clogging disturbances coexist, the single technical problem faced by existing indoor landscape self-circulating drip irrigation systems is: how to stably and repeatedly identify and judge the risk state of "the supply of liquid not being recovered as expected and turning into leakage through a non-recovery path" without relying on a large number of terminal points and without significantly increasing the complexity of the system, so as to avoid the premature exposure of water leakage hazards. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a control method for a self-circulating drip irrigation system for indoor landscapes. The method includes irrigation after a self-check, obtaining the supply volume based on the main pipe flow rate and converting the main circulation tank level into a tank volume change, calculating the consistency difference and comparing it with the short-term retention upper limit; if the limit is exceeded, a hard shutdown is initiated. During operation, the system handles secondary safety collection chamber triggering, conservation verification failure, and flow anomaly in a tiered manner, supporting soft stop verification and locking. After locking, manual reset is performed and fault location is output. The learning mode updates the short-term retention upper limit and zone flow windows. This method improves the certainty of preventing water leakage and reduces false alarms and maintenance costs, solving the technical problems described in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A control method for a self-circulating drip irrigation system for indoor landscapes includes: S1 Before irrigation, the secondary safety collection chamber is not triggered and the liquid level in the main circulation tank is higher than the low liquid level, the partition valve is closed, the normally closed safety valve of the main pipe is short-opened, the circulation pump stops and the valve is closed after a micro-pulse, the main pipe flow rate decay and liquid level pattern are read when the pump stops, and if there is an abnormality, the system is locked and stopped.

[0010] S2 opens the target zone valve and the normally closed failure safety valve of the main pipe, runs the circulation pump, obtains the supply volume from the main pipe flow rate, obtains the volume change from the main circulation tank level, obtains the consistency difference value, compares the short-term retention upper limit, and if the limit is exceeded, hard cut-off occurs.

[0011] S3 priority-based cutoff: If the secondary safety collection chamber is triggered, power is cut off, the normally closed safety valve of the main pipe fails, the pump is stopped, and the partition valve is closed; if the consistency difference exceeds the limit, a hard cutoff is locked; if the main pipe flow is abnormal but does not exceed the limit, a soft stop is performed for verification, and if the verification is abnormal, a hard cutoff is performed.

[0012] After S4 locks, manual reset is performed. Before the reset, the secondary safety collection chamber is restored to safety and the liquid level in the main circulation tank reaches the minimum operating line. Then S1 is executed, the positioning conclusion is output, and the upper limit of short-term retention and the zone flow window are updated.

[0013] Furthermore, the secondary safety collection chamber outputs a leakage signal and a high liquid level signal. When the leakage signal is triggered or the high liquid level signal is triggered, the power supply circuit of the circulating pump and the power supply circuit of the normally closed failure safety valve of the main pipe are simultaneously cut off via hard wiring interlock. A locking flag is written into the controller to prevent the opening of the partition valve. The locking flag is only cleared after manual reset.

[0014] Furthermore, in S1, with the partition valve remaining closed, the circulating pump starts first, and then the normally closed failure safety valve of the main pipe opens to form a micro-pulse liquid supply. When the pulse ends, the normally closed failure safety valve of the main pipe closes first and the circulating pump stops. Then, the pump stop monitoring window is entered, and the main pipe flow rate and the liquid level of the main circulation tank are collected synchronously with a preset sampling period.

[0015] Furthermore, within the pump stop monitoring window, a residual flow integral is generated based on the main flow rate and compared with a preset residual flow threshold, and a stabilization criterion is generated based on the liquid level in the main circulation tank and compared with a preset stabilization threshold.

[0016] When the residual integral comparison is not satisfied, the controller keeps the normally closed safety valve of the main pipe closed and enters the lockout. When the stabilization criterion comparison is not satisfied, the controller keeps the normally closed safety valve of the main pipe closed and enters the lockout. At the same time, the trigger category is recorded for the generation of the positioning conclusion of S4.

[0017] Furthermore, in S2, the mapping relationship between the liquid level of the main circulation tank and the volume of the main circulation tank is established by segmented water injection during the installation and commissioning phase as lookup data and piecewise linear interpolation is used to obtain the value. During operation, the liquid level of the main circulation tank that exceeds the lookup range is subjected to boundary saturation treatment, and the volume change is calculated after zero-point calibration is completed with static liquid level each time power is turned on.

[0018] Furthermore, the upper limit of short-term retention is determined by a combination of pipeline volume, dripper retention amount, and matrix adsorption upper limit. In learning mode, when the secondary safety collection chamber is not triggered and S1 is passed, S2 is continuously executed on the same partition and the maximum allowable retention record is extracted to update the upper limit of short-term retention. The update result is associated with the corresponding partition and stored.

[0019] Furthermore, the soft stop in S3 includes pausing the circulation pump and closing the main pipe normally closed failure safety valve while keeping the partition valve closed, then performing a short flushing process and re-executing S1 once. The short flushing process includes briefly starting the circulation pump while the main pipe normally closed failure safety valve remains closed to push the residual liquid in the recovery loop back. After S1 is completed, S2 is then entered.

[0020] Furthermore, the location conclusion in S4 is generated by combining the trigger category, the consistency difference exceeding the limit state, and the discrimination result of S1. The location conclusion is a sequence of inspection items arranged in chronological order. The inspection item sequence includes the safety chassis status, the liquid supply pipeline connection section status, the recovery circuit unobstructed status, and the filter blockage status. The inspection item sequence is output to the human-machine interface and written into the history record.

[0021] Furthermore, the learning mode is activated after manual confirmation following maintenance and dripper replacement. The controller executes S2 zone by zone according to the zone valve and collects the main flow time series and return flow delay information of the corresponding zone. Based on the time series, the minimum and maximum values ​​are extracted to form the lower and upper limits of the zone flow window, and the discrimination boundary associated with the zone is updated with the return flow delay information.

[0022] Furthermore, manual reset in the locked state is triggered by key input. After receiving key input, the controller sequentially verifies that the secondary safety collection chamber is in a safe state, the liquid level of the main circulation tank has reached the minimum operating line, and completes S1. After S1 is passed, the lock is released and the controller enters standby state while keeping the partition valve closed. If S1 is not passed, the controller refuses to reset and keeps the normally closed safety valve of the main pipe closed.

[0023] (III) Beneficial Effects

[0024] This invention provides a control method for a self-circulating drip irrigation system for indoor landscaping, which has the following beneficial effects:

[0025] Using the short window after the circulating pump stops following a micro-pulse as the observation time interval, and the decay of the main flow rate and the stabilization of the liquid level in the main circulation tank as the criteria, valve leaks, siphon residual flow, or abnormal pipeline integrity are detected and the pump is shut down before the zoned water supply begins. Simultaneously, changes in the supply volume and tank volume are recorded, and the consistency difference is calculated and compared with the upper limit of short-term retention. Closed-loop information from the self-circulation structure back to the main circulation tank is used for external leakage identification, distinguishing between normal retention recovery delays and leakage through non-recovery paths. Secondary safety collection chamber triggering, conservation verification failure, and abnormal main flow rate are executed according to hazard priority. The normally closed safety valve of the main pipe is de-energized and shut down in conjunction with the circulating pump shutdown, supplemented by soft-stop verification to reduce false shut-off caused by transient disturbances.

[0026] By manually resetting the gating binding reset conditions, before resetting, the secondary safety collection chamber is restored to safety, the main circulation tank liquid level is at the minimum operating line and self-checks again, and after locking, the positioning conclusion that matches the event record is output. In the learning mode, the short-term retention upper limit and the zone flow window are written back to the subsequent judgment, and a pre-self-check, closed-loop verification, graded cut-off, and reset learning closed loop are constructed to ensure the certainty of indoor loss prevention and long-term stability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the control method for the self-circulating drip irrigation system for indoor landscapes according to the present invention;

[0028] Figure 2 This is a hardware architecture diagram of the indoor landscape self-circulating drip irrigation system of the present invention;

[0029] Figure 3 This is a flowchart of the four-step closed-loop control process of the entire chain of this invention;

[0030] Figure 4 This is a timing diagram illustrating the principle of micropulse self-testing and residual current index in this invention;

[0031] Figure 5 This is a schematic diagram illustrating the principle of verifying the consistency between the liquid supply volume and the tank volume changes in this invention.

[0032] Figure 6This is a diagram illustrating the hazard priority arbitration and state machine transition of the present invention.

[0033] Figure 7 This is a schematic diagram of the fault location decision tree and self-learning update of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-7 This invention provides a control method for a self-circulating drip irrigation system for indoor landscaping.

[0036] Step 1: Without deploying end-points, before actual irrigation, use the micro-pulse-pump stop-residual flow / level pattern of valve status programming to form verifiable evidence of pipeline connection, valve sealing and siphon residual flow, and use the self-test pass signal as the only entry point to step 2.

[0037] Indoor landscape systems often use concealed pipelines and drippers built into the back panel, so leaks tend to accumulate at the bottom of the equipment rather than being immediately visible. At the same time, the liquid level in the main circulation tank drops and recovery is delayed. If the boundary between the available liquid and the recoverable liquid is not clearly defined first, the flow rate and liquid level response obtained from subsequent micro-pulses will lack a unified reference, making it difficult to distinguish between abnormalities and transient disturbances.

[0038] Therefore, before the self-test begins, the status of the secondary safety collection chamber and the operating liquid level of the main circulation tank must be locked as the self-test threshold to ensure that the input conditions for any self-test are consistent.

[0039] The controller reads the leakage / high level status of the secondary safety collection chamber and the liquid level of the main circulation tank. When the secondary safety collection chamber is triggered, it determines that there is liquid accumulation on the non-recovery path, directly keeps the normally closed safety valve of the main pipe closed, and prohibits the circulation pump from starting. When the liquid level of the main circulation tank is lower than the minimum operating level, it determines that the circulation pump is at risk of idling, and also prohibits the micro-pulse. Only when the secondary safety collection chamber is not triggered and the liquid level of the main circulation tank is higher than the minimum operating level will the controller generate a self-test allow signal and record the self-test threshold for verification in step four.

[0040] The secondary safety collection chamber uses a conductive leak-proof plate or float-type level switch; the main circulation tank level uses a hydrostatic or ultrasonic level sensor. To avoid repeated opening and closing of the self-test inlet due to level signal fluctuations, the controller employs a trigger-and-hold strategy for the secondary safety collection chamber trigger signal, meaning that once triggered, it remains triggered until manually reset; a hysteresis comparison strategy is used for the main circulation tank level, meaning that the level threshold for entering the self-test and the level threshold for exiting the self-test are set separately to ensure that minor level fluctuations during the self-test process do not change the state.

[0041] By fixing the boundary state between the secondary safety collection chamber and the main circulation tank at the self-test inlet, the flow rate and liquid level response during the micro-pulse phase have consistent conditions, so as to trigger the hold and hysteresis comparison to avoid malfunctions caused by state jitter; and to provide repeatable input for subsequent residual flow discrimination and liquid level pattern discrimination.

[0042] Indoor self-circulating drip irrigation has a small flow rate and delayed recovery. If the zone valve is opened at the same time during the self-test, the seepage and recovery delay at the drip tip will block leakage or leakage caused by loose hoses. If there is siphon after the pump stops, the residual flow will continue along the elevation difference. It is necessary to fix the self-test object to the main pipe and key connection section through valve status arrangement during the self-test, and inject a small amount of liquid through micro-pulse to make the abnormal phenomenon appear in a short window.

[0043] Upon entering self-test mode, the controller first closes all zone valves to ensure that the dripper end does not participate in the self-test response. Then, it opens only the normally closed failure safety valve on the main pipe, creating a single path from the main circulation tank to the circulation pump, filter, and the critical connection section of the main pipe. The controller drives the circulation pump in a micro-pulse mode, immediately stopping the pump and closing the normally closed failure safety valve on the main pipe after the micro-pulse liquid supply time ends, switching the system to a static observation state. This action chain makes any continuous abnormal changes in flow rate or liquid level more likely to originate from valve leaks, joint leaks, or siphon residual flow, rather than dripper end seepage and recovery delays.

[0044] Micro-pulse liquid supply is achieved by short-term energization of a constant-speed pump or short-term operation of a variable-speed pump at low speed. The normally closed failure safety valve on the main pipe is a normally closed solenoid valve or a spring-return valve that closes upon power failure. To ensure that false flow spikes are not caused by pipeline rebound after pump shutdown, the controller closes the normally closed failure safety valve on the main pipe before entering the observation window when the pump stops. A vacuum breaking component is installed at the high point of the liquid supply. The vacuum breaking component is a pressure vacuum breaking structure or a vacuum breaking hole structure. Its function is to introduce air after pump shutdown to break the negative pressure condition, so that the liquid column is no longer pulled by the height difference.

[0045] By closing the partition valve and limiting the self-test path, the self-test signal mainly reflects the sealing status of the key connection section of the main pipe; by using micro-pulse liquid supply to expose abnormalities in a short time, the dependence on dripper end seepage and recovery delay is reduced; and by using the vacuum breaking component to weaken the siphon residual flow caused by the height difference after the pump stops, the self-test is more focused on controllable fault sources.

[0046] Furthermore, within the observation window after pump shutdown, if the normally closed safety valve on the main pipe fails to seal properly or if siphoning exists, the main pipe flow will not return to zero quickly as expected, but will instead exhibit a continuous wake. However, indoor drip irrigation systems may experience sensor zero drift and transient spikes, and directly using a hard threshold of zero is easily affected by noise. Therefore, a residual flow index is constructed to weight and accumulate the continuity of the wake, while attenuating transient spikes.

[0047] Install a flow sensor on the main pipe to obtain the main pipe flow. Before each step one is initiated, and under the static state of the main pipe's normally closed failure safety valve closed and the circulating pump stopped, a static flow sequence is collected and the mean value is taken as the zero point. Subsequent sampling will be conducted according to... Processing; among which This is the sensor's raw output. (Through...) Truncate negative values ​​to zero, This only indicates the volumetric flow rate in the direction of liquid supply, thus relating to... The volume integral remains consistent.

[0048] The controller uses the pump stop time as a reference, samples the main flow rate, and performs anti-pulse filtering. Then, it calculates the residual flow index within the observation window and compares it with the residual flow threshold. The residual flow threshold is not a fixed constant, but is determined by the liquid level in the main circulation tank at the self-test inlet and the zero-point state of the main flow sensor, so that the residual flow discrimination under different assembly volumes and liquid level conditions has a consistent scale.

[0049] If the residual flow index exceeds the threshold, it is determined to be a valve leakage or siphon residual flow risk, and a lockout shutdown signal is directly generated. The residual flow index is also written into the fault record for use in the positioning prompt in step four.

[0050] Processing method: The residual current index is adopted in the form of an exponentially weighted integral, specifically as follows:

[0051]

[0052] Among them: main flow : Represents the function of the main flow rate over time, with a value range of . Its function is to characterize whether continuous flow still exists after the pump is stopped; the pump stop time : Indicates the moment when the circulating pump switches from running to stopping, with the value range being a time point within one self-test cycle; relative time. : Represents the relative time counted backward from the moment the pump stops, with a value of ;

[0053] Observation window duration : Indicates the duration of the observation window used to calculate the residual flow index after the pump is stopped, with a value range of . attenuation coefficient : Represents the decay coefficient of the exponential weight, with a value of Maximum flow This indicates the upper limit of the main flow range. Its value is determined by the flow sensor specifications and its function is to limit the flow rate. The physical upper bound is used for residual exponent scaling; residual exponent : Represents the weighted cumulative amount of the wake after the pump stops, with a value range of . ;

[0054] The controller uses a trapezoidal integral approximation and employs a three-point median filter to suppress single-point spikes; when a variable-speed pump is used, The moment when the speed command is zero and the motor current enters the quiescent range is selected. By performing an exponentially weighted integral on the wake after the pump stops, the continuous wake is accumulated and expressed in the residual current exponent, while transient spikes and subsequent noise are attenuated. By combining the traceable pump stop time with the observation window, a correspondence is established between the residual current discrimination and the fault mechanism of valve sealing and siphon residual current. Thus, a verifiable valve leakage / siphon risk assessment can be given without relying on end sensors.

[0055] After a self-test micro-pulse, the liquid level in the main circulation tank of an indoor self-circulating drip irrigation system will change briefly. If there is leakage at the main pipe connection or leakage outside the non-recovery path, the liquid level change will often show a downward movement that does not stabilize. If it is a normal micro-supply and recovery delay, the liquid level change will show a short downward movement followed by a gradual leveling off within the observation window. Comparing only the liquid level difference may be affected by sensor resolution and recovery delay disturbances; therefore, it is necessary to quantify the liquid level curve shape and verify it with the residual flow index.

[0056] After the pump stops, the controller collects the liquid level sequence of the main circulation tank in the observation window, first constructs a continuous curve by interpolation, and then quantifies the stabilization trend of the curve to obtain the liquid level stabilization index; the liquid level stabilization index and the residual flow index together form a self-check evidence pair.

[0057] If both the residual flow index and the liquid level stabilization index indicate abnormalities, an external leakage or siphon risk is identified and the system is locked. If one of them is abnormal while the other is normal, the self-test is marked as requiring retesting. The controller executes a micro-pulse again while keeping the valve closed to distinguish between occasional bubble disturbances and persistent faults. The system is only locked if the retest is still abnormal, in order to reduce downtime caused by one-time disturbances. To prevent abnormal water from being carried into the landscape wall during the retest, the zone valves remain closed during the retest, and the normally closed safety valve of the main pipe closes immediately each time the pump stops.

[0058] The liquid level stabilization index adopts the stabilization energy form with slope weighting, specifically:

[0059]

[0060] Among them: liquid level in the main circulation tank : Represents the liquid level in the main circulation tank as a function of time, taking values ​​of Its function is to provide an observable measure characterizing changes in the tank's volume; minimum liquid level. : Indicates the minimum permissible operating liquid level in the main circulation tank; its value is determined by the tank structure and the pump suction port position; maximum liquid level : Indicates the highest permissible liquid level in the main circulation tank, the value of which is determined by the tank structure and overflow design;

[0061] relative time : Represents the relative time counted backward from the moment the pump stops, with values ​​ranging from 0 to 1. Liquid level stabilization index : Represents the weighted cumulative value of the slope of liquid level change within the observation window, with a value of The weighted scale; intermediate term It can be obtained in any of the following ways:

[0062] Piecewise cubic Hermite interpolation is performed on discrete liquid level points, and the derivative is calculated using the difference method; polynomial sliding fit is performed on the discrete liquid level sequence, and the fitting derivative is taken; the central difference is used directly. Approximate derivative, and limit the derivative. The rest... , , Consistent with the above, their functions are to align the pump shutdown reference, limit the observation range, and attenuate the noise impact in the later stage.

[0063] The controller performs piecewise cubic Hermite interpolation on discrete liquid level points and approximates the derivative using a difference method; the endpoint slope uses the slopes of adjacent points and is limited to avoid amplified jumps. The liquid level stabilization threshold passes a normal self-test record during installation and commissioning. The range is determined; when the self-learning update threshold is enabled in step four, only movement in a more conservative direction is allowed, and manual confirmation is required.

[0064] By weighted accumulation of the slope of the liquid level curve, the liquid level stabilization index can be distinguished from the liquid level stabilization index when the liquid level stabilizes after a short period of decline. The residual flow index and the liquid level stabilization index are used to form an evidence pair and a re-inspection mechanism is introduced so that the self-inspection can not only capture the risks of continuous leakage and siphoning, but also reduce the misjudgment caused by bubbles and transient disturbances.

[0065] Step 2: Assuming the self-test in Step 1 passes, when irrigation fluid supply and recycling return occur in parallel, use the main flow rate... The integral volume and the liquid level in the main circulation tank Changes in converted box volume A consistency verification is performed to transform the state of leakage from non-recovery paths into quantitative evidence that can trigger step three.

[0066] Under low-volume drip irrigation, pump pulsation, air entrainment, and valve rebound will... A short-term spike forms in the middle; if judged directly by the instantaneous threshold, the transient disturbance is easily interpreted as leakage. Step one has already set the pump stop time. Observation window duration With attenuation coefficient Solidified into an observable boundary, and expressed as a residual index The wake after the pump is stopped should be within Internal attenuation, therefore step two uses the same Construct a sliding verification window to align the volume verification with the self-inspection boundary.

[0067] Using the current moment as the end of the window, trace back... A verification window is created; if the information left in step one... Or liquid level stabilization indicators If the system fails to return to the self-test pass range, step two will not open the zone valve. Instead, the normally closed safety valve for main pipe failure will remain closed, and the system will return to step one for retesting. This avoids adding valve leakage or siphon residual flow to the irrigation period verification. After the self-test passes, the controller will check the self-test within each verification window. Peak removal, amplitude limiting, and integration are used to obtain the supply volume. and the supply volume This serves as evidence from the supply side for subsequent consistency comparisons.

[0068] Among them, for discrete First, a three-point median filter is applied to suppress single-point spikes, then a first-order hysteresis limiting is applied to suppress alternating jumps; finally, trapezoidal integration is used for calculation.

[0069]

[0070] Wherein: liquid supply volume : Value Its function is to verify the cumulative volume of liquid supplied within the verification window; main flow rate. : Value Its function is the instantaneous intensity function of the liquid supply; at the end of the window... The value can be any point in time within a single irrigation task, and its function is to align the sliding window to the reference point; the duration of the observation window. : Value Its function is to act as the integration time scale and is consistent with step one; the independent variable of integration : Value The function is as the independent variable for integration time; maximum flow rate The value is determined by the flow sensor's range and serves as a physical upper limit and scale normalization.

[0071] Based on the duration of the observation window Align the self-test and verification time scales, and suppress spikes with filtering and limiting to ensure the supply volume A more stable characterization of cumulative liquid supply; then using the residual flow index. , As an inlet constraint, it avoids known wake anomalies from contaminating irrigation period verification; thus outputting repeatable evidence of supply-side volume.

[0072] Recirculation and return processes are delayed and intermittent, making it difficult to record data solely by observing the return port. The main circulation tank is a closed-loop terminal container, and its level changes carry information about whether water has returned to the system. However, the tank often contains inclined surfaces and guide components, and the level and volume are non-linear, requiring prior monitoring. Convert to tank volume, then compare with the liquid supply volume The volume of the box varies on the same window size. .

[0073] Controller continuously collects data The tank volume was calculated based on the liquid level-volume calibration table established during installation and commissioning. Then at the end of each window calculate and The difference yields the change in the box volume. When reflux lag leads to If the value is too small within the short window, the controller will not directly determine leakage. Instead, it will uniformly classify the allowed short-term inconsistencies into the upper bound of the short-term retention period. This allows hysteresis and short-term adsorption to enter the comparison in the form of a boundary.

[0074] Defined as the sum of three items: the upper limit of the effective volume of the main and branch pipes (determined by pipe diameter and length), the upper limit of the volume of the dripper and end hose (determined by model and quantity), and the upper limit of substrate short-term adsorption (under the condition of no leakage, based on a short irrigation segment). The supremum is used as the adsorption upper bound. The first two terms can be obtained by geometric calculation, and the third term is updated on the verification fragment in step 4 and is guaranteed to be monotonically non-decreasing.

[0075] The calibration table can be obtained from the water filling scale of the tank. The controller uses piecewise linear interpolation and maintains monotonicity; the hydrostatic level gauge is first calibrated at two points at full scale. The tank volume change is calculated as follows:

[0076]

[0077] Among them: changes in box volume : Value Its function is to provide evidence of the volume of the main circulation box within the window; box volume. : Value The function is based on Converted box volume;

[0078] Maximum volume of the enclosure The value is determined by the box structure and acts as a volume boundary.

[0079] End of window time Duration of observation window Its function is to achieve differential alignment and time scale unification.

[0080] During the installation and commissioning phase, the main circulation tank will be raised from empty to its maximum liquid level. Inject a known volume of water in stages and record the corresponding liquid levels. With cumulative volume Obtain the calibration point pair and demand Strictly increasing to ensure the mapping is monotonic; implemented at runtime using piecewise linear interpolation. Time to take:

[0081]

[0082] For liquid levels exceeding the range, saturation treatment should be applied: if but ,like but Furthermore, saturation is used as a maintenance indicator rather than as a criterion.

[0083] The liquid level was converted to volume using a calibration table and monotonic interpolation, allowing the process of returning to the main circulation tank to be quantified and recorded; then, the same observation window duration was used. structure To ensure its compatibility with Within the comparable domain at the same scale, thus forming closed-loop side volume evidence. Liquid supply occurs first, followed by reflux; short-term matrix adsorption and pipeline retention cause intermittent inconsistencies. Ignoring these mechanisms would lead to misjudging normal delays as leaks during verification. Therefore, an upper bound on short-term retention is introduced. and with consistency difference and The relationship is used as the sole criterion, so that only inconsistencies beyond the boundary are interpreted as risks of leakage through non-recovery paths.

[0084] The controller at the end of each window calculate and to Take the absolute value to accommodate sign fluctuations caused by reflux intervals; then compare. and If the requirements are met in three to six consecutive verification windows If this occurs, a conservation verification failure signal will be generated.

[0085] If only a single window exceeds the boundary, the controller reviews the output of step one. Is there a synchronization error? If things remain normal, continue to observe instead of failing immediately, thereby reducing single-window misjudgments caused by bubbles and reflux delay.

[0086] The consistency difference is calculated as follows:

[0087]

[0088] Wherein: consistency difference : Value The effect is that the liquid supply is not quantitatively reflected in the change of tank volume; liquid supply volume : Serves as evidence of liquid supply volume; changes in tank volume : Evidence of volume that serves as a closed-loop return to the main circulation tank;

[0089] Short-term retention upper limit : Value Its function is to set the upper limits for permissible pipeline retention, dripper retention, and short-term matrix adsorption; its setting is determined by the effective pipeline volume, dripper layout, and matrix type, and during the self-learning process in step four, it is only allowed to be updated in a more conservative direction; the rest... , , , Its function is the same as described above.

[0090] When using, use the consistency difference. The evidence of closed-loop liquid supply and recovery is combined into a single criterion, with the upper limit of short-term retention as the criterion. Explicit containment delay and short-term adsorption make verification insensitive to physically explainable hysteresis; then use The single-window overrun is reviewed to make the failure signal more consistent with the leakage mechanism, thereby providing a stable trigger for step three.

[0091] Furthermore, step three uses the failure of conservation verification as the second priority trigger condition, and must obtain executable and traceable input; if only binary conclusions are output, it is difficult to distinguish between poor recovery and leakage of liquid supply on site.

[0092] When the conservation check fails and is successful, the controller sets the window endpoint. and the corresponding liquid supply volume Changes in box volume Consistency difference , Write the fault log and pass the failure signal along with evidence to step three; if Approaching multiple times However, if the failure condition is not met, it is marked as a critical state and used as the soft stop entry point for step three, so that the pause and short flush occur first.

[0093] By encapsulating failure events, the judgment conclusion is bound to the evidence trajectory, enabling step three to directly execute a hard cut-off and point to the inspection path in step four; the critical state is used as the soft stop entry point, so that short-term obstruction or blockage disturbances are given priority to enter the recoverable process; and the correspondence between conservation verification and leakage risk is explained by the visible on-site process.

[0094] Step 3: Transform the evidence formed in Step 1 and Step 2 into a processing sequence, so that the three states of secondary safety liquid collection chamber trigger, conservation verification failure and operation over window are judged, action issued and locked along the same causal chain, and a verifiable trigger basis is retained for Step 4.

[0095] For the operation window, a lower limit for the flow rate of each irrigation zone corresponding to each zone valve is set. With partition traffic limit When the circulating pump is in the running command state and the partition valve is open, if the duration of at least one observation window is continuously observed... Internal satisfaction If it is determined to be a high-flow window overflow; if it exceeds the duration of at least one consecutive observation window... Internal satisfaction It was determined to be a low-flow window overflow. , The flow rate range can be determined during installation and commissioning from a normal irrigation segment, or it can be updated by self-learning on the verification segment in step four. However, the update must be established simultaneously with the conservation verification not failing and the secondary safety collection chamber not being triggered.

[0096] In indoor scenarios, recovery delays, flow fluctuations, and localized leaks may overlap. If handled in parallel, inconsistencies in action coverage and sequence can easily occur. Therefore, step three first classifies the three types of risks into mutually exclusive entry points and fixes the upstream evidence and shielding conditions that each entry point can inherit, ensuring that only one dominant path is allowed at any given time.

[0097] Only when the entry points are mutually exclusive can the subsequent soft stop-hard cut-lock action chain be traced back to a single triggering cause on-site, and the handling chain be prevented from repeatedly jumping when the signal jitters.

[0098] The controller reads the residual current index from step one before proceeding to step three. Liquid level stabilization index And read the consistency difference from step two. With the upper limit of short-term residence When the secondary safety collection chamber is triggered (true), step three directly enters the highest priority entry point; when the secondary safety collection chamber is not triggered and the conservation verification failure signal is true, it enters the second priority entry point and sets the trigger time... Liquid supply volume Changes in box volume Consistency difference With the upper limit of short-term residence Write to the event log; when the secondary safety collection chamber is not triggered and the conservation verification failure signal is false, but the main flow rate is present. When the window is running, it enters the third priority entry point. To avoid transient entry into the third priority during start-stop, the third priority is only applied when the self-test signal in step one is valid and the residual current index is... Triggering is allowed when the device is in the self-test pass zone; once it has entered the locked state, all entrances are blocked until manual reset in step four to unlock it.

[0099] Priority entry is implemented using a finite state machine, with the parent state being the irrigation operation state. Only one sub-state is allowed to be activated at any given time. Sub-state switching is edge-triggered and latched once. The secondary safety collection chamber trigger state can be generated by a conductive leaking plate or a float-type level switch. The trigger signal adopts a hold strategy until manual reset. The conservation verification failure signal is provided by the decision logic in step two and serves as the gating signal for the second priority entry.

[0100] Risk entry mutual exclusion prevents the action chain from being interfered with by the superposition of multiple signals; third priority and residual index The binding suppresses transient false triggering during start-stop; the locked-state shielding entry keeps the handling chain stationary before reset and facilitates on-site cause investigation.

[0101] The secondary safety collection chamber triggering indicates that liquid accumulated in the non-recovery path has entered the bottom area of ​​the equipment, and the handling action needs to be able to be implemented even in the event of a network outage or processor malfunction. Step three completes the pump shutdown and valve closure with the highest priority using the power-off-shutdown link, and ensures consistent valve closure status after disconnection to guarantee that the water circuit enters a definitive closed state.

[0102] If the highest priority handling relies on continuous software operation, abnormal resets may cause delays in action, thereby increasing the risk of the accumulated liquid spreading outside the cabinet.

[0103] Upon triggering, the normally closed failure safety valve of the main pump will be driven to zero to stop the circulating pump, all zone valves will be closed, and the system will enter a locked state. If the triggering occurs during the operation of the circulating pump, the valves will be shut off first, and the triggering time will be saved. and the then-manager of traffic As a basis for investigation. When the system is locked, the default valve is closed and the circulation pump is stopped upon power-on restart. The lock can only be released by the manual reset process initiated in step four. The secondary liquid accumulation will be automatically restored in the unattended state.

[0104] Hard shut-off is divided into two levels: the relay contact of the secondary safety collection chamber is connected in series with the circulating pump power supply, stopping the pump without the processor upon power failure; the coil circuit of the main normally closed failure safety valve is connected in series with the same relay contact, closing the valve when power is lost. Zone valves typically use normally closed solenoid valves or spring-reset valves, closing upon power failure; the valve coil circuit is connected in series with a freewheeling absorption element to suppress backflow during power failure.

[0105] A valve position indicator is installed inside the cabinet; upon triggering, it flips from the open position to the closed position for easy visual confirmation. Trigger type and trigger time. Write to non-volatile memory, which can still be read by step four after power failure. The relay contacts and normally closed valve close when power is lost, so that the highest priority does not depend on the processor for continuous operation; the synchronous closure of the partition valve reduces residual water discharge at the moment of cut-off; the default shutdown upon power-on in the locked state and the record in non-volatile memory support traceable handling in unattended scenarios.

[0106] The failure signal of the conservation verification indicates that the liquid supply does not reflect the trend of changes in the main circulation tank volume. This trend may be caused by leakage or by increased reflux delay due to blockage of the recovery channel. Step 3 separates one-time disturbances from persistent trends through continuous confirmation and continues to use the observation window duration. With attenuation coefficient The scale setting avoids introducing new window parameters, allowing the output of step two to be directly called by step three.

[0107] If the failure signal of conservation verification is directly equated with leakage, it will amplify the false triggering caused by backflow lag and weaken the capacity of the third priority soft stop loop to accommodate recoverable anomalies.

[0108] If the secondary safety collection chamber is not triggered and the conservation verification failure signal is true, step three proceeds to the second priority entry point and checks the consistency difference. The superboundary portion is weighted and accumulated; if the accumulated amount remains non-zero within the continuous window, the trend is determined to continue and a hard cut-off is executed to enter the lock. The hard cut-off action follows the valve closing sequence to ensure waterway convergence.

[0109] If the cumulative amount is within one observation window... If the value returns to zero, the process will proceed to the soft stop entry point and wait for step two to re-verify. At the same time, the conservation failure will be marked as a recoverable event for display in step four.

[0110] Define the superboundary persistence index for

[0111]

[0112] And introduce a persistence threshold With continuous window counting When in a continuous At the end of each sliding window, the condition is satisfied. Only then is the trend confirmed to continue and a second-priority hard cut initiated; when If the issue persists, the system will switch to the third priority soft stop loop and return to the self-check in step one and the review in step two.

[0113] Among them: persistence threshold The range of values ​​is Its function is to suppress minimum out-of-bounds noise and sensor noise; continuous window counting. It is a positive integer and not less than Its function is to reflect continuity rather than transientity.

[0114] Persistent confirmation employs an exponentially weighted cumulative criterion for the out-of-bounds quantity:

[0115]

[0116] Wherein: consistency difference : Range of values The integrand that acts as the degree of inconsistency; upper bound of short-term residence. : Range of values Its function is to define the permissible short-term dwell boundary; observation window duration. : Range of values Its function is to adjust the sliding window size, consistent with steps one and two; attenuation coefficient : Range of values Its function is to highlight proximal persistence and suppress distal noise;

[0117] Triggering time : Values ​​can be taken at any time within the irrigation task, and serve as the window alignment reference; integral independent variable : Range of values The function is as the independent variable for time integration; the maximum volume of the box. The value is determined by the box structure and acts as a volume boundary; maximum flow rate. The value is determined by the flow sensor's range and acts as the upper limit of the scale. The implementation involves first comparing the value within the parentheses with zero and taking the larger one; the exponential weights are obtained using a lookup table and linear interpolation, with the lookup table input being... .

[0118] Continuous confirmation ensures that a one-time recovery delay does not necessarily trigger a hard cutoff; the observation window duration is retained. With attenuation coefficient This ensures that the trend judgment is consistent with steps one and two on a scale; the second priority hard cut-off follows the valve state sequence to quickly converge the waterway and retain interpretable events for positioning in step four.

[0119] An out-of-window operation may be caused by blockage, filter clogging, or air bubble entrainment, and does not necessarily correspond to external leakage. Step 3 sets a third-priority soft stop loop to form a closed loop with the self-check in Step 1 and the verification in Step 2: if the conservation verification does not fail, the recoverable action is executed first, and a new judgment is made under the clean boundary.

[0120] For recoverable anomalies, loopback verification can reduce unnecessary shutdowns and concentrate maintenance actions on the path indicated in step four. When a runtime error occurs and the conservation verification failure signal is false, step three should first close the normally closed safety valve of the main pipe and stop the pump, keeping the zoning valve closed; then allow it to stand for one observation window period. The cycle includes bubble release and backflow delay; after the settling period, it forces a return to step one to perform a micro-pulse self-check. If the self-check passes, it returns to step two for further verification; if the self-check fails, it enters a locked state. If a running window still appears after entering a soft stop twice consecutively in the same irrigation task, step three escalates to a hard cutoff and locks the system, and the trigger type is marked as running window in the event log.

[0121] The static timing is completed by a hardware timer, and the number of upgrades is recorded by a counter register and cleared after the irrigation task ends. To prevent valves from being accidentally opened during soft stop, a surge absorber is connected in series in the coil circuit of the main normally closed failure safety valve, and a reverse diode is connected in series in the coil circuit of the partition valve. The valve drive output is set to the off level by default when the watchdog is reset, and mutual exclusion checks are used for the valve drive commands to ensure that the opening commands of the main normally closed failure safety valve and the partition valve are not issued simultaneously during soft stop.

[0122] The soft stop loop allows the operation window to prioritize entering the recoverable link and return to step one and step two for verification when the conservation has not failed; the number of times escalation converges the continuous anomaly to the locked state, avoiding long-term operation with faults; the mutual exclusion check keeps the valve state of the soft stop state consistent and facilitates on-site verification.

[0123] Step 4: After entering the locking state in Step 3, the locking reason and evidence trajectory are solidified into readable input, and the manual reset threshold and mandatory self-check are used as the recovery entry point. Then, the recovered verifiable fragments are written into the self-learning parameters so that Step 1 and Step 2 can be reproduced on the same scale in the next iteration.

[0124] Indoor landscape systems often involve concealed piping and infrequent inspections. If the trigger evidence is lost after a lockout occurs, repeated start-stop attempts to locate the system can easily remove residual liquid from the cabinet. Therefore, step four first involves determining the trigger type and trigger time from step three. It is solidified into a single-cause index, and the set of parameters directly related to that index is encapsulated into a read-only locked evidence package.

[0125] The locked state should simultaneously provide both shutdown and traceability. Only when the evidence is solidified can the reset entry be gated to avoid disordered trial and error. Therefore, the controller reads the trigger type and trigger time in the locked state. and read the supply volume Changes in box volume Consistency difference Short-term retention upper limit Simultaneously read the residual current index Liquid level stabilization index And save the duration of the observation window. With attenuation coefficient The duration of the observation window Used to define the sliding window size and attenuation coefficient. Used for exponential weight decay; the controller writes the above amount to non-volatile memory and maintains a read-only state. The reset entry only occurs when the secondary safety collection chamber is not triggered and the main circulation tank level is [not specified]. Above the minimum liquid level Open when the window is open; otherwise, keep the window locked and prompt the user to complete drainage or fluid replenishment first.

[0126] The trigger categories are enumerated in a finite manner and correspond one-to-one with the processing chain in step three; the locked evidence package is written cyclically with a verification code to ensure that it can still be read after power failure; the reset button only generates a reset request, and whether to enter the reset process is determined by the gating conditions.

[0127] Locking the evidence package allows the triggering cause and key quantities to be traced even after a power outage; resetting the inlet gate makes the secondary safety collection chamber and minimum liquid level constraints hard conditions, so that on-site handling first eliminates the risk of liquid accumulation and dry running; thereby reducing the need for repeated trial opening of pump valves after locking.

[0128] Indoor self-circulating drip irrigation may have multiple causes for the same symptom. For example, a drop in the liquid level in the main circulation tank may be due to normal liquid supply or leakage from non-recovery paths. Therefore, step four does not output a conclusive fault name, but instead maps the locked evidence package to an executable inspection sequence, allowing personnel to complete the location with minimal disassembly and assembly.

[0129] The location logic must be consistent with the judgment mechanism of Step 1 and Step 2 in order to form a closed loop of evidence-inspection-reset.

[0130] When the trigger type is secondary safety collection chamber trigger, first check whether the safety chassis and leakage plate are still wetted; when the trigger type is conservation verification failure, if the consistency difference is... Exceeding the upper limit of short-term residence If the difference is large, prioritize checking the continuity between the supply circuit connection and the recovery circuit; if the consistency difference is large... Only slight exceedance and liquid level stabilization indicators If the flow is within the passable zone, prioritize checking for obstructions at the recycling inlet, return water slope, and filter blockage. When the local trigger category is running a window upgrade, if the residual flow index... If abnormal, prioritize checking the main pipe's normally closed safety valve seal and vacuum breaking assembly. If the residual flow index is abnormal... If everything is normal, prioritize checking for clogged filters and drippers, as well as air bubbles at the pump inlet.

[0131] The mapping rules are implemented using a fixed decision tree, where nodes only reference quantities in the locked evidence package; for larger amplitudes / slight out-of-bounds errors, interval comparisons are used, with the interval endpoints determined by the short-time delay upper bound. The historical data is given through intervals. On-site inspections are performed in the order of visible to hidden: first the secondary safety collection chamber, hose joints, recovery inlet and filter, then the dripper and main pipe connection section inside the back panel; after each step is completed, the personnel select the corresponding item on the panel, and the system only performs read-only verification, only reading the status of the secondary safety collection chamber and the liquid level of the main circulation tank, without starting the circulation pump and valves, and only writing the verification results into the inspection record, so that the inspection chain in step four has a time sequence.

[0132] The mapping from evidence to inspection actions ensures that the trigger category is consistent with the on-site inspection sequence; read-only verification avoids accidental activation of pump valves during the inspection process; the implementation example demonstrates a chain transition of recycling inlet - reset - mandatory self-inspection - re-irrigation, which facilitates sequential troubleshooting by non-technical personnel.

[0133] If irrigation proceeds directly after the lockout is released, unresolved valve leaks, siphon residual flow, or loose connections may be amplified into external leaks. Therefore, step four sets the reset-self-test-re-irrigation sequence as non-skippable and uses the residual flow index. Liquid level stabilization index As a safety threshold after reset.

[0134] The goal of resetting is to restore the controllable boundary. Only after confirming that the main circuit is in a state that can be shut off and decayed can the conservation verification in step two be comparable.

[0135] After the reset request is granted, the controller clears the lockout flag but keeps the main valve closed in case of failure, the zone valve closed, and the circulating pump stopped. Then, it forcibly executes the micro-pulse self-test in step one to obtain the new residual current index. With the new liquid level stabilization index If the new residual flow index or the new liquid level stabilization index falls into the self-test failure range, the system will immediately return to the locked state and prompt for inspection of the valve seal and vacuum breaking components; if both fall into the pass range, the system will enter the safety transition phase: only the normally closed safety valve of the main pipe will be opened and the circulating pump will be run for a short period of time, equivalent to the duration of an observation window. This allows the liquid in the main circulation tank to exchange with that in the main pipe. Then, close the normally closed failure safety valve in the main pipe and stop the pump. Confirm the liquid level in the main circulation tank. Still above the minimum liquid level Only after that can step two be allowed to open the zone valve to begin irrigation.

[0136] The self-test failure and success intervals follow the threshold of step one; the safe transition interval is determined by the observation window duration. As the sole criterion, and to ensure that the normally closed safety valve of the main pipe fails before stopping the pump; for equivalent implementations, the safety transition section can be replaced by two shorter micro-pulses, but the constraint of keeping the partition valve closed and checking the minimum liquid level after the transition still needs to be met.

[0137] The self-check ensures that the main circuit after reset is brought back into the identifiable range; the safe transition section completes the circuit exchange and verifies the minimum liquid level without supplying liquid to the dripper end; thus, the recovery process converges in terms of threshold and sequence, reducing the secondary risks caused by direct irrigation after reset.

[0138] In indoor landscapes, the recovery delay and short-term retention can drift with seasonal changes and changes in substrate moisture content. If the upper bound of short-term retention remains fixed for a long period, it may frequently trigger conservation verification failures. Therefore, step four only updates the upper bound of short-term retention on segments that have passed self-checks, completed irrigation, and have not triggered locking, ensuring that updates only move in a more conservative direction so that the update source can be verified by both steps one and two. Self-learning cannot absorb abnormal segments, nor can it raise the boundary indefinitely; therefore, a conservative update is adopted: samples come from verification segments, and the output is not less than the old boundary.

[0139] When an irrigation task ends and is not locked, the controller extracts the consistency difference from the sliding window sequence of that task. The positive residual fragments are extracted and windows near the start and stop are removed. Then, the candidate boundary is generated using the smooth supremacy operator, and the larger one with the existing short-term retention upper bound is taken as the new short-term retention upper bound. This boundary is directly involved in the comparison in the next step two and remains homologous in the persistence confirmation in step three.

[0140] Processing method: The smooth supremum operator is adopted. Smooth maximum form:

[0141]

[0142] Among them: the upper limit of the old short-term retention. : Value Its function is to update the previous boundary; the new short-term dwell upper bound. : Value Its function is to update the boundary and provide a reference for steps two and three; smoothing coefficient : Value Its function is to control the maximum sensitivity of smoothing to large residuals;

[0143] Sample size : Values ​​are positive integers and not less than 5, representing the number of windows participating in the update; Sample time. The value is the time sequence at the end of the selected window, used as a residual index; consistency difference. : Value Its function is to verify the inconsistency obtained; the maximum volume of the container. The value is determined by the box structure and acts as the upper limit of the boundary; maximum flow rate. Duration of observation window Its function is to act as an upper bound on the consistency difference scale;

[0144] Among them, the sample time Only from the secondary safety collection chamber not triggered and the residual flow index Liquid level stabilization indicators The window is selected within the interval. For an equivalent implementation, the smooth supremum operator can be replaced with the quantile upper bound operator, but it must still satisfy the condition that updates only in the verification fragment and only in a more conservative direction.

[0145] When using it, the selection of verification fragments avoids abnormally leaked fragments from being written; the smooth supremum operator provides a conservative boundary without relying on variance-type statistics; taking the maximum ensures that the boundary is monotonically non-decreasing, so that steps two and three are consistent in their discrimination under the same short-time retention upper bound.

[0146] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0147] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0148] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0149] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0150] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method for a self-circulating drip irrigation system for indoor landscaping, characterized in that: include, If the secondary safety collection chamber is not triggered before S1 irrigation and the liquid level in the main circulation tank is higher than the low liquid level, the partition valve is closed, the normally closed failure safety valve of the main pipe is short-opened, the circulation pump stops and the valve is closed after a micro-pulse, the main pipe flow rate attenuation and liquid level pattern are read after the pump stops, and if there is an abnormality, the machine is locked and stopped. S2 opens the target zone valve and the normally closed failure safety valve of the main pipe, runs the circulation pump, obtains the supply volume from the main pipe flow rate, obtains the volume change from the main circulation tank level, obtains the consistency difference value, compares the short-term retention upper limit, and if the limit is exceeded, hard cut-off occurs. S3 cut-off according to priority: if the secondary safety collection chamber is triggered, the power is cut off, the normally closed safety valve of the main pipe fails, the pump is stopped, and the partition valve is closed; if the consistency difference exceeds the limit, a hard cut-off is locked. If the main flow is abnormal but not exceeding the limit, a soft shutdown and review will be initiated; if the review is abnormal, a hard shutdown will be initiated. After S4 locks, manual reset is performed. Before the reset, the secondary safety collection chamber is restored to safety and the liquid level in the main circulation tank reaches the minimum operating line. Then S1 is executed, the positioning conclusion is output, and the upper limit of short-term retention and the zone flow window are updated.

2. The control method for the self-circulating drip irrigation system according to claim 1, characterized in that: The secondary safety collection chamber outputs a leakage signal and a high liquid level signal. When the leakage signal is triggered or the high liquid level signal is triggered, the power supply circuit of the circulating pump and the power supply circuit of the normally closed safety valve of the main pipe are simultaneously cut off through hard wiring interlock. A lock mark is written into the controller to prevent the opening of the partition valve. The lock mark is only cleared after manual reset.

3. The control method for the self-circulating drip irrigation system according to claim 2, characterized in that: In S1, with the partition valve kept closed, the circulating pump starts first, and then the main pipe normally closed failure safety valve opens to form a micro-pulse liquid supply. When the pulse ends, the main pipe normally closed failure safety valve closes first and the circulating pump stops. Then, the pump stop monitoring window is entered and the main pipe flow rate and the main circulation tank liquid level are collected synchronously with a preset sampling period.

4. The control method for the self-circulating drip irrigation system according to claim 3, characterized in that: Within the pump stop monitoring window, a residual flow integral is generated based on the main flow rate and compared with a preset residual flow threshold. Additionally, a stabilization criterion is generated based on the main circulation tank level and compared with a preset stabilization threshold. When the residual integral comparison is not satisfied, the controller keeps the normally closed safety valve of the main pipe closed and enters the lockout. When the stabilization criterion comparison is not satisfied, the controller keeps the normally closed safety valve of the main pipe closed and enters the lockout. At the same time, the trigger category is recorded for the generation of the positioning conclusion of S4.

5. The control method for the self-circulating drip irrigation system according to claim 1, characterized in that: In S2, the mapping relationship between the liquid level and the volume of the main circulation tank is established by segmented water injection during the installation and commissioning phase as lookup table data and piecewise linear interpolation is used to obtain the value. During operation, the liquid level of the main circulation tank that exceeds the lookup table range is subjected to boundary saturation treatment, and the volume change is calculated after zero-point calibration is completed with static liquid level each time power is turned on.

6. The control method for the self-circulating drip irrigation system according to claim 5, characterized in that: The upper limit of short-term retention is determined by the combination of pipeline volume, dripper retention amount and matrix adsorption upper limit. In learning mode, when the secondary safety collection chamber is not triggered and S1 is passed, S2 is continuously executed on the same partition and the maximum allowable retention record is extracted to update the upper limit of short-term retention. The update result is associated with the corresponding partition and stored.

7. The control method for the self-circulating drip irrigation system according to claim 6, characterized in that: The soft stop in S3 includes pausing the circulation pump and closing the normally closed failure safety valve of the main pipe while keeping the partition valve closed. Then, a short flushing process is executed and S1 is executed again. The short flushing process includes briefly starting the circulation pump while the normally closed failure safety valve of the main pipe remains closed to push the residual liquid in the recovery loop back. After S1 is completed, S2 is then entered.

8. The control method for the self-circulating drip irrigation system according to claim 1, characterized in that: The location conclusion in S4 is generated by combining the trigger category, the consistency difference exceeding the limit state, and the discrimination result of S1. The location conclusion is a sequence of inspection items arranged in chronological order. The inspection item sequence includes the safety chassis status, the liquid supply pipeline connection section status, the recovery circuit unobstructed status, and the filter blockage status. The inspection item sequence is output to the human-machine interface and written to the history record.

9. The control method for the self-circulating drip irrigation system according to claim 8, characterized in that: The learning mode is activated after manual confirmation following maintenance or dripper replacement. The controller executes S2 zone by zone according to the zone valve and collects the main flow time series and return flow delay information of the corresponding zone. Based on the time series, the minimum and maximum values ​​are extracted to form the lower and upper limits of the zone flow window, and the discrimination boundary associated with the zone is updated with the return flow delay information.

10. The control method for the self-circulating drip irrigation system according to claim 9, characterized in that: Manual reset in the locked state is triggered by key input. After receiving key input, the controller sequentially verifies that the secondary safety collection chamber is in a safe state, the liquid level of the main circulation tank has reached the minimum operating line, and completes S1. After S1 is passed, the lock is released and the controller enters standby state while keeping the partition valve closed. If S1 is not passed, the controller refuses to reset and keeps the normally closed safety valve of the main pipe closed.

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