A percentage timer for a large sprinkler

Abstract

The present invention proposes a percentage timer for a large sprinkler, in which a human-computer interaction module is used to set and display basic information of the sprinkler, including sprinkler type, inlet flow, sprinkler span length, cantilever length, tail gun spraying radius, sprinkler operating speed, and sprinkler operating length. Sprinkler types include center pivot type and translation type. A status signal input module obtains the operating status signal of the sprinkler. A central processing module obtains the irrigation depth when running at full speed based on the basic information, and then forms a corresponding target percentage signal or an adjusted target percentage signal. The percentage output module converts the target percentage signal into a first timing switch signal to drive the sprinkler to operate. When the translation sprinkler deviates from its operating direction, the adjusted target percentage signal is converted into a second timing switch signal and output through two percentage output terminals to achieve automatic guidance of the translation sprinkler.

Description

Technical Field

[0001] The invention relates to the technical field of water-saving irrigation, in particular to a percentage timer for a large-scale sprinkler. Background Art

[0002] Large sprinklers are widely used in water-saving irrigation. The main types of large sprinklers include pivot and lateral sprinklers. These two types of sprinklers generally use percentage timers for operational control. By varying the time the sprinkler runs and stops within a minute, the sprinkler's speed is adjusted, thereby regulating the depth of rainfall delivered. In practice, the user calculates a percentage value based on the desired irrigation volume, sets the percentage using a dial knob, and then starts the sprinkler. To ensure that lateral sprinklers follow the water supply channel or designed path, pivot sprinklers, unlike pivot sprinklers, require a percentage timer or a percentage timer with peripheral electrical logic at each locomotive and span end. This system, combined with operating direction and offset status, activates or stops the corresponding end, ensuring the sprinkler follows the water supply channel or designed path (guided control). Existing large sprinkler control systems are complex and need improvement. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] Therefore, the object of the present invention is to provide a percentage timer for a large sprinkler to effectively reduce the complexity of the sprinkler control system, especially the control system of a translational sprinkler.

[0005] To achieve the above-mentioned purpose, the present invention proposes a percentage timer for a large-scale sprinkler irrigation machine, comprising a human-computer interaction module, a status signal input module, a central processing module, and a percentage output module;

[0006] The human-computer interaction module is used to set and display basic information of the sprinkler, including sprinkler type, inlet flow, sprinkler span length, cantilever length, tail gun spraying radius, sprinkler operating speed, and sprinkler operating length. The sprinkler type includes center pivot type and translation type.

[0007] The state signal input module is used to obtain the operation state signal of the sprinkler;

[0008] The central processing module is configured to obtain an irrigation depth when the sprinkler is operating at full speed based on the basic information, obtain a target percentage based on the irrigation depth when the sprinkler is operating at full speed and a given irrigation depth, and generate a target percentage signal having the target percentage as a duty cycle and a given period; and is further configured to adjust the target percentage signal based on the operating status signal when an operating direction deviation occurs for the translational sprinkler to obtain an adjusted target percentage signal.

[0009] The percentage output module is used to convert the target percentage signal into a first timing switch signal to drive the sprinkler. It is also used to convert the adjusted target percentage signal into a second timing switch signal when the translation sprinkler deviates from its operating direction, and output it through the first percentage output terminal corresponding to the locomotive end or the second percentage output terminal corresponding to the span end, so as to achieve automatic guidance of the translation sprinkler.

[0010] In the large sprinkler percentage timer provided by the present invention, in the central processing module, the irrigation depth when running at full speed is obtained based on the basic information, and the target percentage is obtained based on the irrigation depth when running at full speed and the given irrigation depth, including: for a center-pivot sprinkler, when running in a full circle, the first sprinkler coverage area is obtained based on the sprinkler span length, the cantilever length, and the tail gun spraying radius; the first shortest time for the sprinkler to run for one cycle is obtained based on the sprinkler span length and the sprinkler running speed; the first irrigation depth when running at full speed is obtained based on the inflow flow, the first sprinkler coverage area, and the first shortest time; and the corresponding target percentage is obtained based on the first irrigation depth and the given irrigation depth of the sprinkler.

[0011] In the large sprinkler percentage timer provided by the present invention, in the central processing module, the irrigation depth when running at full speed is obtained based on the basic information, and the target percentage is obtained based on the irrigation depth when running at full speed and the given irrigation depth, including: for a translational sprinkler, the second sprinkler coverage area is obtained based on the sprinkler running length, the sprinkler span length, the cantilever length, and the tail gun spraying radius; the second shortest time of the sprinkler is obtained based on the sprinkler running length and the sprinkler running speed; the second irrigation depth when running at full speed is obtained based on the inflow flow, the second irrigation coverage area, and the second shortest time; and the corresponding target percentage is obtained based on the second irrigation depth and the given irrigation depth of the sprinkler.

[0012] In the large sprinkler percentage timer provided by the present invention, the adjusted target percentage signal is obtained by modulating the target percentage signal and the pilot modulation wave. The period and duty cycle of the pilot modulation wave are adjustable, and the pilot modulation wave is a multi-pulse signal.

[0013] In the percentage timer of the large sprinkler provided by the present invention, the status signal input module includes a forward operation signal input terminal, a reverse operation signal input terminal, a translational sprinkler deflection span direction signal input terminal, a translational sprinkler deflection locomotive direction signal input terminal, and a synchronization signal terminal. The operation status signal of the sprinkler includes a forward operation signal, a reverse operation signal, a translational sprinkler deflection span direction signal, a translational sprinkler deflection locomotive direction signal, and a synchronization signal.

[0014] In the percentage timer of the large sprinkler provided by the present invention, for a translational sprinkler, when a deviation in the running direction occurs, the target percentage signal is adjusted based on the running status signal to obtain an adjusted target percentage signal, including: for a translational sprinkler, if the locomotive direction signal input terminal of the translational sprinkler is high, the corresponding target percentage signal is modulated by a guide modulation wave to obtain a corresponding adjusted target percentage signal, and the adjusted target percentage signal is converted into a second timing switch signal output through the second percentage output terminal, and the first percentage output terminal keeps outputting the target percentage signal. A first timing switch signal corresponding to the percentage signal; if the signal input terminal of the translational sprinkler is at a high level, the corresponding target percentage signal is modulated by the guide modulation wave to obtain the corresponding adjusted target percentage signal, so as to convert the adjusted target percentage signal into a second timing switch signal output through the first percentage output terminal, and the second percentage output terminal keeps outputting the first timing switch signal corresponding to the corresponding target percentage signal; if there is no input to the forward operation signal input terminal and the reverse operation signal input terminal, or there is no input to the synchronization signal terminal, the percentage output module has no output.

[0015] The percentage timer for a large sprinkler provided by the present invention further includes a communication module, which includes a plurality of communication terminals and a plurality of wireless antenna interfaces.

[0016] In the large sprinkler percentage timer provided by the present invention, the communication module is used to obtain the sprinkler power supply voltage, input pressure or input flow through the corresponding communication terminal, and the central processing module is also used to control the operation and stop of the sprinkler based on the sprinkler power supply voltage, input pressure, input flow and corresponding thresholds.

[0017] In the percentage timer of the large sprinkler provided by the present invention, the communication module is also used to obtain relevant sensor information through the corresponding communication terminal. The relevant sensor information includes GNSS positioning, orientation information, operating posture, boundary arrival information, temperature, humidity, wind speed, wind direction, rainfall and other environmental information. The central processing module is also used to control the operation of the sprinkler based on the obtained relevant sensor information.

[0018] The percentage timer for the large sprinkler provided by the present invention further includes an encoder, which is a physical knob.

[0019] The large-scale sprinkler percentage timer provided by the present invention includes a human-computer interaction module, a status signal input module, a central processing module, and a percentage output module; the human-computer interaction module is used to set and display basic information of the sprinkler, which includes the sprinkler type, inflow flow, sprinkler span length, cantilever length, tail gun spraying radius, sprinkler operating speed, sprinkler operating length, and sprinkler types including center pivot type and translation type; the status signal input module is used to obtain the operating status signal of the sprinkler; the central processing module is used to obtain the irrigation depth when running at full speed based on the basic information, and obtain the target percentage based on the irrigation depth when running at full speed and the given irrigation depth. The invention relates to a method for adjusting the target percentage signal based on the operating status signal when the running direction of the translation sprinkler deviates, and forming a target percentage signal with the target percentage as the duty cycle and a given period; it is also used for adjusting the target percentage signal based on the operating status signal to obtain an adjusted target percentage signal when the running direction deviates from the translation sprinkler; the percentage output module is used to convert the target percentage signal into a first timing switch signal to drive the sprinkler to operate; it is also used to convert the adjusted target percentage signal into a second timing switch signal when the running direction of the translation sprinkler deviates, and output it through the first percentage output terminal corresponding to the locomotive end or the second percentage output terminal corresponding to the span end, so as to realize automatic guidance of the translation sprinkler. The percentage timer of the present invention supports multiple types of sprinklers, including center-pivot sprinklers and translatory sprinklers, and has corresponding control functions for different types of sprinklers. In particular, for translatory sprinklers, the percentage timer can be used to adjust the timing switch signal output in combination with the operating status signal when the translatory sprinkler deviates from its trajectory to perform guidance control. Compared with the complex control systems of existing sprinklers, the complexity of the sprinkler control system, especially the control system of the translatory sprinkler, is effectively reduced.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A block diagram of a percentage timer for a large sprinkler provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the external structure of a percentage timer for a large sprinkler provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the connection of a percentage timer for a large sprinkler provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the operation of a translational sprinkler provided in an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of target percentage signal adjustment provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0028] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. It should also be understood that the term "and / or" used in the present invention refers to and includes any or all possible combinations of one or more associated listed items.

[0030] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0031] The present invention provides a percentage timer for a large sprinkler to effectively reduce the complexity of a sprinkler control system, especially a control system for a translational sprinkler. The percentage timer for a large sprinkler in the present invention can be referred to as a percentage timer.

[0032] Figure 1 This is a block diagram of a percentage timer for a large sprinkler provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the external structure of a percentage timer for a large sprinkler provided by an embodiment of the present invention. Figure 2 (a) is the front view of the percentage timer of a large sprinkler. Figure 2 (b) is the right side view of the percentage timer of a large sprinkler. Figure 2 (c) is the rear view of the percentage timer of a large sprinkler. Figure 3 This is a connection diagram of a percentage timer for a large sprinkler provided by an embodiment of the present invention.

[0033] like Figure 1 As shown, the large sprinkler irrigation machine percentage timer includes a human-computer interaction module, a status signal input module, a central processing module, and a percentage output module. The human-computer interaction module and the status signal input module are respectively connected to the central processing module, and the central processing module is also connected to the percentage output module.

[0034] In this embodiment, the human-computer interaction module is used to set and display basic information of the sprinkler.

[0035] Specifically, the human-computer interaction module can be, for example, a display screen. Figure 2 As shown in (a), the display screen 1 is arranged on the panel of the percentage timer, as shown in FIG. Figure 3 As shown, the display screen is connected to the central processing module. It is used to input settings and transmit them to the central processing module. It also displays information such as the pivot's operating status. The display screen provides an intuitive graphical user interface, allowing users to easily enter and modify basic pivot information. After saving the entered or modified settings, the system automatically calculates and displays the percentage output value.

[0036] In this embodiment, the basic information of the sprinkler includes the sprinkler type, inflow rate, sprinkler span length, cantilever length, tail gun spraying radius, sprinkler operating speed, and sprinkler operating length. The inflow rate refers to the total flow rate of the sprinkler water pipe, that is, the amount of water that can be provided per unit time. The sprinkler span length refers to the span length of a lateral sprinkler or the distance between the center point of the center support and the terminal tower vehicle of a center pivot sprinkler. The cantilever length refers to the cantilever length of a center pivot sprinkler. The tail gun spraying radius refers to the range of the nozzle installed at the end of the sprinkler. The sprinkler operating speed refers to the operating speed of the sprinkler when it is running at full speed. The sprinkler operating length refers to the effective length of the actual irrigation area of ​​the lateral sprinkler in the direction of travel.

[0037] In this embodiment, the basic information of the sprinkler also includes the sprinkler operating angle, which refers to the azimuth angle of the span of the center pivot sprinkler relative to the true north direction when the sprinkler is operating.

[0038] In this embodiment, the basic information also includes the rated speed of the driving motor, the effective radius of the matching tire, the transmission ratio of the driving motor reducer, and the transmission ratio of the wheel reducer.

[0039] In this embodiment, the types of sprinklers include center pivot type and translation type sprinklers.

[0040] In this embodiment, the timer further includes an encoder 2, which is a physical knob. Figure 2 As shown in (a), the encoder 2 is arranged on the panel of the percentage timer, as shown in FIG. Figure 3 As shown, the encoder is connected to the central processing module. The encoder has a push-to-confirm function and is used for input and confirmation.

[0041] Specifically, the encoder has a setting function: the encoder acts as a physical knob that can be used to fine-tune a percentage setpoint. As the user rotates the encoder, the corresponding percentage value on the display updates in real time, providing a quick way to make adjustments. It also has a confirmation and cancel function: the center button of the encoder is used to confirm the setting or cancel the current operation, improving the flexibility and accuracy of user interaction.

[0042] In this embodiment, the display 1 and encoder 2 integrate an intuitive human-machine interface (HMI) to set and display the current operating status. The encoder's rotation direction matches the direction of percentage increase and decrease: clockwise rotation increases the percentage, and counterclockwise rotation decreases it. Other parameters are also adjusted using the rotary encoder. After completing the settings, a short press of the encoder button exits the value adjustment. The display provides a hierarchical menu and options, with the main interface offering commonly used parameter settings. The HMI offers options to switch the control and indication functions for percentage output according to the type of sprinkler being used. Whether using a pivot or traverse sprinkler, the HMI displays the current percentage output value, as well as the sprinkler's operating status and fault information, in real time, facilitating user monitoring and maintenance. Set parameters and calculation results can be saved and directly recalled the next time the sprinkler is used, reducing repetitive input and improving efficiency. Through the human-machine interface, you can set the maximum timing length of the timer (for example, the default is 60 seconds), the period and duty cycle of the guided modulation wave, set the percentage (0-100%) before operation, and then the percentage output will be cyclically timed according to the setting.

[0043] In some embodiments, a given irrigation depth may be switched to replace the percentage. In this case, the rotary encoder will adjust the given irrigation depth value, display the corresponding target percentage, and make a corresponding timing switch output.

[0044] In this embodiment, the timer further includes a mounting bolt 3 and a housing 18 (see Figure 2 (b)). Install the fixing bolts 3 to fix the housing 18 to the panel. The bottom surface of the housing 18 (i.e., the side away from the panel) is as follows. Figure 2 As shown in (c).

[0045] In this embodiment, the timer further includes a power supply module. Figure 3 As shown, the power module is connected to the central processing module. The power module includes a Figure 2 The first power input terminal 4 and the second power input terminal 5 on the bottom surface of the housing 18 are shown in (c). The power module can be connected to an external DC or AC power source. If the first power input terminal 4 is one pole of the AC or DC power supply, the second power input terminal 5 is the other pole of the corresponding AC or DC power supply.

[0046] In this embodiment, the percentage output module is used to output corresponding timing switch signals for each type of sprinkler. The percentage output module includes a first percentage output terminal and a second percentage output terminal. Specifically, Figure 3 As shown, the percentage output module is connected to the central processing module. The percentage output module includes a Figure 2The first percentage output terminal 6 and the second percentage output terminal 7 are located on the bottom surface of the housing 18 shown in (c). The percentage output module converts the target percentage signal into a first timing switch signal to drive the sprinkler. It is also used to convert the adjusted target percentage signal into a second timing switch signal when the lateral sprinkler deviates from its operating direction, outputting it through the first percentage output terminal corresponding to the locomotive end or the second percentage output terminal corresponding to the span end, thereby achieving automatic guidance of the lateral sprinkler.

[0047] In this embodiment, the status signal input module is used to obtain the operating status signal of the sprinkler. The status signal input module includes a forward operation signal input terminal, a reverse operation signal input terminal, a synchronization signal terminal, a lateral sprinkler deflection span direction signal input terminal, and a lateral sprinkler deflection locomotive direction signal input terminal.

[0048] Specifically, the status signal input module is a switch input module, such as Figure 3 As shown in Figure 1, the switch input module is connected to the central processing module. Figure 2 On the bottom surface of the housing 18 shown in (b), as shown in FIG. Figure 2 The switch input module shown in (c) arranged on the bottom surface includes a forward operation signal input terminal 8, a reverse operation signal input terminal 9, a lateral sprinkler deflection span direction signal input terminal 10, a lateral sprinkler deflection locomotive direction signal input terminal 11, and a synchronization signal terminal 12. The forward operation signal input terminal 8 is used to receive a forward operation signal input. The reverse operation signal input terminal 9 is used to receive a reverse operation signal input. The lateral sprinkler deflection span direction signal input terminal 10 is used to receive a lateral sprinkler deflection span direction signal input. The lateral sprinkler deflection locomotive direction signal input terminal 11 is used to receive a lateral sprinkler deflection locomotive direction signal input. The synchronization signal terminal 12 is used to receive a synchronization signal input.

[0049] Figure 4 The schematic diagram of the operation of the translation type sprinkler provided by the embodiment of the present invention is shown in FIG. Figure 4As shown, a translational sprinkler includes a locomotive, a span, water pipes arranged on the span, and tires arranged on the locomotive and span. The locomotive moves forward or backward along the water supply channel or designed path, thereby driving the span forward or backward, thereby moving the sprinkler forward or backward. Forward indicates that the sprinkler is currently operating in the forward direction, and backward indicates that the sprinkler is currently operating in the reverse direction. When the sprinkler deviates from the planned path, it is divided into left deviation and right deviation. Left deviation indicates that the sprinkler is currently deviating in the direction of the locomotive. Right deviation indicates that the sprinkler is currently deviating in the direction of the span. In addition, a boundary signal can be set to indicate whether the sprinkler is approaching the boundary of the operating area in the direction of travel, which is divided into forward boundary and reverse boundary. Synchronous operation of multiple spans means that multiple spans approach the same boundary at the same time. When multiple spans are operating synchronously, a span synchronization signal is generated. The synchronization signal received by synchronization signal terminal 12 is the span synchronization signal. It should be noted that loss of synchronization occurs when the sprinkler cannot operate normally. In addition, the current sprinkler's running direction, deviation direction, synchronization status, running time and other information are displayed in real time on the display screen. Figure 4 The situation shown is that of water supply through canals, and the same applies to water supply through drag pipes.

[0050] In this embodiment, the central processing module is used to obtain the irrigation depth when operating at full speed based on basic information, obtain the target percentage based on the irrigation depth when operating at full speed and a given irrigation depth, and generate a target percentage signal with the target percentage as the duty cycle and a given period. The central processing module is also used to adjust the target percentage signal based on the operating status signal when the operating direction of the translational sprinkler deviates to obtain an adjusted target percentage signal.

[0051] The watering depth at full speed is obtained based on the basic information, and the target percentage is obtained based on the watering depth at full speed and the given watering depth, including:

[0052] For a center pivot sprinkler operating in full circle, the first sprinkler coverage area is calculated based on the sprinkler span length, cantilever length, and tail gun spray radius. The first minimum time for a sprinkler operation is calculated based on the sprinkler span length and sprinkler operating speed. The first irrigation depth when operating at full speed is calculated based on the inflow, the first sprinkler coverage area, and the first minimum time. The corresponding target percentage is obtained based on the first irrigation depth and a given irrigation depth.

[0053] For translational sprinklers, the second sprinkler coverage area is obtained based on the sprinkler operating length, sprinkler span length, cantilever length, and tail gun spraying radius; the second shortest sprinkler time is obtained based on the sprinkler operating length and sprinkler operating speed; the second irrigation depth when running at full speed is obtained based on the inflow rate, the second sprinkler coverage area, and the second shortest time; and the corresponding target percentage is obtained based on the second irrigation depth and the given irrigation depth.

[0054] Specifically, a series of basic information of the sprinkler is set through the human-computer interaction module, and these settings are saved so that the target percentage can be automatically calculated for a given irrigation depth when the sprinkler is required to operate in the future, thereby achieving quantitative irrigation more intuitively and conveniently.

[0055] 1) For center pivot sprinklers, in full circle operation:

[0056] The coverage area of ​​the first sprinkler is obtained based on the span length, cantilever length, and tail gun spray radius of the sprinkler. The coverage area A1 of the first sprinkler satisfies:

[0057]

[0058] Where, L p L is the span length of the sprinkler; a is the cantilever length; R is the tail gun spray radius.

[0059] The shortest time for the sprinkler to run for one cycle is obtained based on the span length and the operating speed of the sprinkler. The shortest time t min1 satisfy:

[0060]

[0061] Where, L p is the span length of the sprinkler; v e is the operating speed of the sprinkler. The operating speed of the sprinkler depends on the traveling speed of the tower vehicle and can be expressed as: Where: Sprinkler operating speed v e is the maximum travel speed of the tower vehicle, in m / min; η is the field surface slip coefficient, generally taken as 0.92~0.97; n is the rated speed of the drive motor, in r / min; r is the effective radius of the matching tire, in m; i1 is the transmission ratio of the drive motor reducer; i2 is the transmission ratio of the wheel reducer.

[0062] The first irrigation depth is obtained based on the inflow flow, the coverage area of ​​the first sprinkler, and the first shortest time. The first irrigation depth is the irrigation depth h when the sprinkler is running at 100% full speed. m1 , which satisfies:

[0063]

[0064] Where Q0 is the inlet flow rate. p The water utilization coefficient for field spraying is 0.7-0.9.

[0065] The corresponding target percentage is obtained based on the first irrigation depth and the given irrigation depth of the sprinkler. The corresponding target percentage xw1 satisfy:

[0066]

[0067] Where h w The given irrigation depth of the pivot.

[0068] 2) For center pivot sprinklers, the sprinkler operating angle can be used to perform corresponding calculations when the sprinkler is not running in a full circle. Specifically, the sprinkler operating angle is used to calculate the corresponding first sprinkler coverage area, and then the sprinkler operating angle is used to calculate the arc length. The ratio of the arc length to the sprinkler operating speed is used to obtain the corresponding first shortest time. Then, the corresponding target percentage is obtained by referring to the calculation process when the sprinkler is running in a full circle.

[0069] 3) For lateral sprinkler irrigation machines:

[0070] The coverage area of ​​the second sprinkler is obtained based on the sprinkler operating length, the sprinkler span length, the cantilever length, and the tail gun spraying radius. The coverage area A2 of the second sprinkler satisfies:

[0071]

[0072] Where, L f L is the operating length of the sprinkler; p L is the span length of the sprinkler; a is the cantilever length; R is the tail gun spray radius.

[0073] The second shortest time for the sprinkler to run from one end to the other end is obtained based on the sprinkler running length and sprinkler running speed. The second shortest time t min2 satisfy:

[0074]

[0075] Where, L f is the operating length of the sprinkler; v e The operating speed of the sprinkler can be calculated by referring to the calculation formula of the above-mentioned center pivot sprinkler in full circle operation.

[0076] The second irrigation depth is obtained based on the inflow flow, the second irrigation machine coverage area, and the second shortest time. The second irrigation depth is the irrigation depth h when the sprinkler is running at 100% full speed. m2 , which satisfies:

[0077]

[0078] Where Q0 is the inlet flow rate. p The water utilization coefficient for field spraying is 0.7-0.9.

[0079] The corresponding target percentage is obtained based on the second irrigation depth and the given irrigation depth of the sprinkler. w2 satisfy:

[0080]

[0081] Where h w The given irrigation depth of the pivot.

[0082] In this embodiment, a flexible output distribution mechanism is designed in the central processing module, taking into account the working principles and control requirements of different sprinklers, to adapt to the different operating strategies of center pivot sprinklers and lateral sprinklers.

[0083] For center-pivot sprinklers: Users can select either the first or second percentage output terminal through the human-machine interface module. This output generates the first timer switch signal, converted from the target percentage signal, to directly control the sprinkler's operating speed. The unselected percentage output is used for auxiliary control linkage outputs based on travel position, such as controlling the start and stop of tail guns and fertilizer spreaders. If there is no input to the forward and reverse signal input terminals, or the synchronization signal terminal, the percentage output module will not output.

[0084] For a translational sprinkler: when a deviation in the operating direction occurs, the target percentage signal is adjusted based on the operating status signal to obtain an adjusted target percentage signal, including:

[0085] For a translatory sprinkler, if the translatory sprinkler's locomotive direction signal input terminal is at a high level, the corresponding target percentage signal is modulated by the pilot modulation wave to obtain a corresponding adjusted target percentage signal, which is then converted into a second timing switch signal output via the second percentage output terminal. The first percentage output terminal continues to output the first timing switch signal converted from the target percentage signal.

[0086] If the span direction signal input terminal of the translational sprinkler is at a high level, the corresponding target percentage signal is modulated by the pilot modulation wave to obtain a corresponding adjusted target percentage signal, and the adjusted target percentage signal is converted into a second timing switch signal through the first percentage output terminal and outputted. The second percentage output terminal keeps outputting the first timing switch signal converted by the target percentage signal.

[0087] If there is no input to the forward running signal input terminal and the reverse running signal input terminal, or there is no input to the synchronization signal terminal, the percentage output module will have no output.

[0088] Specifically, the outputs of the two percentage output terminals (the first percentage output terminal 6 and the first percentage output terminal 7 ) are determined based on three input signals: the running direction, the deviation direction and the synchronization signal, thereby achieving precise operation control.

[0089] For a translatory sprinkler, the forward running signal input terminal 8, the reverse running signal input terminal 9, the translatory sprinkler deviation span direction signal input terminal 10, the translatory sprinkler deviation locomotive direction signal input terminal 11, and the synchronization signal terminal 12 respectively receive the running direction, deviation direction, and synchronization signal. The first percentage output terminal drives the locomotive side to run, and the second percentage segment drives the locomotive side to run;

[0090] 1) When the deviation direction is left (i.e., the input terminal of the signal for the translational sprinkler to deviate to the locomotive direction is high), the span side percentage output is reduced (i.e., the adjusted target percentage signal is converted into a second timing switch signal and output through the second percentage output terminal), and the first percentage output terminal keeps outputting the first timing switch signal converted from the target percentage signal;

[0091] 2) When the deviation direction is right (i.e., the span-direction signal input terminal of the translational sprinkler is high), the percentage output on the locomotive side is reduced (i.e., the adjusted target percentage signal is converted into a second timing switch signal and output through the first percentage output terminal), and the second percentage output terminal continues to output the first timing switch signal converted from the target percentage signal to correct the driving trajectory of the sprinkler.

[0092] 3) Under normal driving conditions without deviation, the first percentage output terminal and the second percentage output terminal will remain consistent, that is, both output the first timing switch signal converted from the target percentage signal to ensure synchronous operation.

[0093] 4) If there is no input to the running direction signal terminal (i.e. the sprinkler is not running) or no input to the synchronization signal terminal (i.e. loss of synchronization occurs), the output of the first percentage output terminal and the output of the second percentage output terminal will be stopped.

[0094] In this embodiment, the adjusted target percentage signal is obtained by modulating the target percentage signal and the pilot modulation wave. The period and duty cycle of the pilot modulation wave are adjustable, and the pilot modulation wave is a multi-pulse signal.

[0095] Figure 5 This is a schematic diagram of target percentage signal adjustment provided by an embodiment of the present invention. Figure 5 (a) is a schematic diagram of an embodiment of a target percentage signal. Figure 5 (b) is a schematic diagram of an embodiment of a guided modulation wave. Figure 5 (c) is based on Figure 5Schematic diagram of the adjusted target percentage signal obtained in (a) and (b).

[0096] like Figure 5 As shown in (a), the target percentage signal is a square wave with a period of 60 seconds and a duty cycle of 50%. The pilot modulation wave is a pulse signal with a period of 10 seconds and a duty cycle of 50%. The pilot modulation wave is aligned with the rising edge of the target percentage signal. Figure 5 The target percentage signal in (a) is Figure 5 After the guided modulation wave of (b) is modulated (i.e. adjusted), Figure 5 The adjusted target percentage signal is shown in (c). Compared to the traditional method of completely shutting down the percentage output, the present invention adjusts the target percentage signal output according to the pilot modulation wave, effectively correcting deviation while preventing damage to the locomotive and truss structure due to lack of stress relief during the adjustment process. The pilot modulation wave period and duty cycle are stored as system parameters and adjusted based on the equipment length and operating conditions to achieve optimal results.

[0097] In this embodiment, the timer further includes a communication module, which includes multiple communication terminals and multiple wireless antenna interfaces. Specifically, the communication module includes a BLE (Bluetooth) module, an RF (radio frequency) / LTE (high-speed wireless) communication module, and an RS485 / CAN communication module. Figure 3 As shown, the BLE module, RF / LTE communication module and RS485 / CAN communication module are connected to the central processing module respectively. The BLE module includes Figure 2 The first wireless antenna interface 16 shown in (c) and the RF / LTE communication module include Figure 2 The second wireless antenna interface 17 shown in (c) is RS485 / CAN communication module. Figure 2 As shown in (c), the first communication terminal 13 and the second communication terminal 14 can adopt A+ / H of RS485 / CAN, and the second communication terminal 14 can adopt B- / L of RS485 / CAN.

[0098] The communication module of the present invention integrates a variety of communication technologies, including RS485 bus, low-power Bluetooth (BLE) and Lora, etc., to support sensor information collection and wireless connection control. Among them 1) RS485 bus communication: In the present invention, an RS485 bus is provided for communicating with external devices such as pressure sensors and flow sensors to collect real-time pressure and flow data. The central processing module uses the collected sensor information for local control or forwarding through other communication ports through RS485 bus communication. 2) Low-power Bluetooth (BLE) communication: In the present invention, BLE is used to support wireless connection between mobile terminals such as smartphones or tablets and the system. Users can adjust parameters and implement monitoring through mobile terminals such as mobile phones. 3) Mobile communication module. The present invention further integrates a mobile communication module to support data transmission through a cellular network. Depending on the application scenario, RS485 can be replaced with a CAN bus, or CAN bus support can be added.

[0099] In this embodiment, the communication module is further used to obtain the water supply pressure through the corresponding communication terminal, and the central processing module is further used to control the operation of the sprinkler based on the water supply pressure and the water supply pressure threshold.

[0100] Specifically, the present invention introduces a pressure monitoring mechanism, allowing users to set the water supply pressure waiting threshold through the human-computer interface (i.e., through the human-computer interaction module or encoder). After the pressure sensor is connected to the communication port (the pressure sensor detects the water supply pressure entering the machine), the percentage output state is dynamically adjusted according to the real-time inlet pressure (i.e., the water supply pressure entering the machine).

[0101] 1) Pressure waiting mode setting: A waiting pressure threshold can be set through the human-machine interface. When the inlet pressure detected by the system is lower than this threshold (i.e., the water supply pressure threshold), each percentage output terminal will automatically stop output to avoid uneven irrigation caused by operation under low pressure; the system will enter a waiting state until the pressure returns to above the preset value, at which time the system will automatically restart and continue irrigation.

[0102] 2) Dry Operation Mode: Also through the HMI, users can enable dry operation mode. In this mode, the system disables inlet pressure monitoring. Even in the absence of water or low water pressure, the percentage output will not automatically stop, allowing for special irrigation needs or testing purposes.

[0103] 3) Real-time Pressure Monitoring: The system monitors inlet pressure in real time. Once pressure falls below a preset waiting threshold, it immediately triggers the appropriate control action, such as stopping output at each percentage. Pressure data and system status are displayed in real time on the human-machine interface, making it easy for users to monitor and adjust.

[0104] 4) Safety and alarm mechanism: In pressure waiting mode, if the system is in a low pressure state for a long time, the system will issue an alarm to prompt the user to check the water supply system.

[0105] In this embodiment, the communication module is used to obtain the sprinkler's supply voltage through the corresponding communication terminal. The central processing module is also used to control the sprinkler's operation and shutdown based on the sprinkler's supply voltage and voltage threshold. Specifically, similar to the input pressure monitoring mechanism, this invention allows the user to set the power supply wait threshold through the human-machine interface. After connecting a voltage sensor to the communication port, the percentage output state or alarm is dynamically adjusted based on the real-time supply voltage.

[0106] In this embodiment, parameter setting can be achieved through an encoder and a display, or can be remotely implemented through a communication port or a wirelessly connected handheld terminal, or through mobile communication methods such as 4G / 5G.

[0107] In this embodiment, if Figure 2 As shown in (c), the timer further includes a protective ground terminal 15.

[0108] In this embodiment, the timer further includes a storage module. Figure 3 As shown, the storage module is connected to the central processing module. The storage module is used to store various data collected and calculated by the timer.

[0109] In this embodiment, the maximum walking speed can be set and obtained through a positioning device (GNSS, etc.) connected to the communication port. Furthermore, after setting the irrigation amount within different angle / distance ranges, the positioning information can be obtained by connecting to the communication port, and the percentage output and linkage control can be automatically adjusted according to the set range, such as the opening and closing of the tail gun and fertilizer pump.

[0110] In this embodiment, the communication module is used to obtain the inflow flow of the sprinkler through the corresponding communication terminal, and the central processing module is further used to control the operation and shutdown of the sprinkler based on the inflow flow of the sprinkler and the inflow flow threshold.

[0111] In some embodiments, the set inflow flow rate can also be obtained through a flow meter connected to the communication port.

[0112] In this embodiment, the communication module is also used to obtain relevant sensor information through the corresponding communication terminal. The relevant sensor information may include but is not limited to GNSS positioning, orientation information, operating posture, boundary arrival information, temperature, humidity, wind speed, wind direction, rainfall and other environmental information. The central processing module is also used to control the operation of the sprinkler based on the obtained relevant sensor information.

[0113] It should be noted that the aforementioned explanation of the embodiment of the percentage timer for a large sprinkler is also applicable to the control method of the percentage timer for a large sprinkler in this embodiment, which will not be repeated here.

[0114] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0115] The large sprinkler percentage timer in the embodiment of the present invention includes a human-computer interaction module, a status signal input module, a central processing module, and a percentage output module; the human-computer interaction module is used to set and display basic information of the sprinkler, including sprinkler type, inflow flow, sprinkler span length, cantilever length, tail gun spraying radius, sprinkler operating speed, sprinkler operating length, and sprinkler types including center pivot type and translation type; the status signal input module is used to obtain the operating status signal of the sprinkler; the central processing module is used to obtain the irrigation depth when running at full speed based on the basic information, and obtain the target irrigation depth based on the irrigation depth when running at full speed and the given irrigation depth. percentage, and forms a target percentage signal with the target percentage as the duty cycle and a given period; is also used for adjusting the target percentage signal based on the operating status signal when the running direction deviates from the translational sprinkler to obtain an adjusted target percentage signal; the percentage output module is used to convert the target percentage signal into a first timing switch signal to drive the sprinkler to operate; is also used to convert the adjusted target percentage signal into a second timing switch signal when the running direction of the translational sprinkler deviates from the operation direction, and output it through the first percentage output terminal corresponding to the locomotive end or the second percentage output terminal corresponding to the span end, so as to realize automatic guidance of the translational sprinkler. In this case, the percentage timer of the present invention supports multiple types of sprinklers, including center-pivot sprinklers and translatory sprinklers, and has corresponding control functions for different types of sprinklers. In particular, for translatory sprinklers, the timer also adjusts the timing switch signal output in combination with the operating status signal to perform guidance control when the translatory sprinkler deviates from its trajectory. Compared with the complex control systems of existing sprinklers, the complexity of the sprinkler control system, especially the translatory sprinkler control system, is effectively reduced.

[0116] The timer of the present invention features a rotary encoder with a confirmation button, a display screen, a set of power terminals, two percentage output terminals, five status input terminals, a set of RS485 communication terminals, two antenna adapters, and a protective ground terminal. The housing is equipped with panel mounting bolts. It has two percentage timing outputs, supports both center-pivot and lateral sprinklers, and provides guidance control for lateral sprinklers. It also features a communication interface for connecting sensors and the Internet of Things. The timer of the present invention effectively reduces the complexity of sprinkler control systems, especially those for lateral sprinklers, effectively lowers equipment costs, improves the digitalization and intelligence of the equipment, conserves water resources in agricultural production, and improves economic and ecological benefits.

[0117] The accompanying drawings illustrate schematic diagrams of the structures of embodiments disclosed herein. These figures are not drawn to scale; for clarity, certain details are exaggerated and some may be omitted. The shapes, relative sizes, and positional relationships of the various regions and layers shown in the figures are illustrative only and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions based on practical needs. It should be understood that the various forms of the processes shown above may be used, with steps reordered, added, or deleted. For example, the steps described herein may be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed herein are achieved. The present invention is not limited thereto. The above-described specific embodiments do not constitute a limitation on the scope of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A percentage timer for a large sprinkler, characterized in that: It includes human-computer interaction module, status signal input module, central processing module and percentage output module; The human-computer interaction module is used to set and display basic information of the sprinkler, including sprinkler type, inlet flow, sprinkler span length, cantilever length, tail gun spraying radius, sprinkler operating speed and sprinkler operating length. The sprinkler type includes center pivot type and translation type. The state signal input module is used to obtain the operation state signal of the sprinkler, including: a forward operation signal input terminal, a reverse operation signal input terminal, a translational sprinkler deflection span direction signal input terminal, a translational sprinkler deflection locomotive direction signal input terminal and a synchronization signal terminal. The operation state signal of the sprinkler includes the forward operation signal, the reverse operation signal, the translational sprinkler deflection span direction signal, the translational sprinkler deflection locomotive direction signal and the synchronization signal; The central processing module is configured to obtain an irrigation depth when the sprinkler is operating at full speed based on the basic information, obtain a target percentage based on the irrigation depth when the sprinkler is operating at full speed and a given irrigation depth, and generate a target percentage signal having a duty cycle and a given period with the target percentage as the duty cycle; and is further configured to adjust the target percentage signal based on the operating status signal when an operating direction deviation occurs for the translational sprinkler to obtain an adjusted target percentage signal. The percentage output module is used to convert the target percentage signal into a first timing switch signal to drive the sprinkler. It is also used to convert the adjusted target percentage signal into a second timing switch signal when the translatory sprinkler deviates from its operating direction and output it through the first percentage output terminal corresponding to the locomotive end or the second percentage output terminal corresponding to the span end, thereby achieving automatic guidance of the translatory sprinkler. For a translational sprinkler, when a deviation in the running direction occurs, the target percentage signal is adjusted based on the running state signal to obtain an adjusted target percentage signal, including: for a translational sprinkler, if the translational sprinkler deflection locomotive direction signal input terminal is high, the corresponding target percentage signal is modulated by a pilot modulation wave to obtain a corresponding adjusted target percentage signal, and the adjusted target percentage signal is converted into a second timing switch signal output through the second percentage output terminal, and the first percentage output terminal keeps outputting the first timing switch signal corresponding to the target percentage signal. When the span direction signal input terminal of the translational sprinkler is at a high level, the corresponding target percentage signal is modulated by the pilot modulation wave to obtain the corresponding adjusted target percentage signal, so as to convert the adjusted target percentage signal into a second timing switch signal output through the first percentage output terminal, and the second percentage output terminal keeps outputting the first timing switch signal corresponding to the corresponding target percentage signal. If there is no input to the forward operation signal input terminal and the reverse operation signal input terminal, or there is no input to the synchronization signal terminal, the percentage output module has no output.

2. The large sprinkler percentage timer according to claim 1, characterized in that: In the central processing module, obtaining the irrigation depth when running at full speed based on the basic information, and obtaining the target percentage based on the irrigation depth when running at full speed and a given irrigation depth, including: For a center pivot sprinkler, in the case of full circle operation, the coverage area of ​​the first sprinkler is obtained based on the span length of the sprinkler, the cantilever length and the tail gun spraying radius; Obtaining a first shortest time for a sprinkler machine to operate for one cycle based on the span length of the sprinkler machine and the operating speed of the sprinkler machine; Obtaining a first irrigation depth when operating at full speed based on the inflow flow, the coverage area of ​​the first sprinkler and the first shortest time; A corresponding target percentage is obtained based on the first irrigation depth and a given irrigation depth of the sprinkler.

3. The percentage timer for a large sprinkler according to claim 1, characterized in that: In the central processing module, obtaining the irrigation depth when running at full speed based on the basic information, and obtaining the target percentage based on the irrigation depth when running at full speed and a given irrigation depth, including: For a translational sprinkler, obtaining a second sprinkler coverage area based on the sprinkler operating length, the sprinkler span length, the cantilever length, and the tail gun spraying radius; Obtaining a second shortest time for the sprinkler based on the sprinkler operation length and the sprinkler operation speed; Obtaining a second irrigation depth at full speed based on the inflow rate, the coverage area of ​​the second sprinkler and the second shortest time; A corresponding target percentage is obtained based on the second irrigation depth and a given irrigation depth of the sprinkler.

4. The percentage timer for a large sprinkler according to claim 1, characterized in that: The adjusted target percentage signal is obtained by modulating the target percentage signal and the pilot modulation wave. The period and duty cycle of the pilot modulation wave are adjustable, and the pilot modulation wave is a multi-pulse signal.

5. The percentage timer for a large sprinkler according to claim 1, characterized in that: The system also includes a communication module, which includes multiple communication terminals and multiple wireless antenna interfaces.

6. The percentage timer for a large sprinkler according to claim 5, characterized in that: The communication module is used to obtain the sprinkler power supply voltage, input pressure and input flow through the corresponding communication terminal, and the central processing module is also used to control the operation and stop of the sprinkler based on the sprinkler power supply voltage, input pressure and input flow and the corresponding threshold values.

7. The percentage timer for a large sprinkler according to claim 5, characterized in that: The communication module is also used to obtain relevant sensor information through the corresponding communication terminal. The relevant sensor information includes GNSS positioning, orientation information, operating posture, boundary arrival information, temperature, humidity, wind speed, wind direction and rainfall, etc. The central processing module is also used to control the operation of the sprinkler based on the obtained relevant sensor information.

8. The percentage timer for a large sprinkler according to claim 1, characterized in that: An encoder is also included, which utilizes a physical knob.

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