Large sprinkler percentage timer

Abstract

A man-machine interaction module in the timer is used for setting and displaying basic information of the sprinkling machine, and the basic information comprises the type of the sprinkling machine, the entering flow, the span length of the sprinkling machine, the length of a cantilever, the sprinkling radius of a tail gun, the running speed of the sprinkling machine and the running length of the sprinkling machine. The sprinkling irrigation machine comprises a central fulcrum shaft type and a translation type; the state signal input module obtains an operation state signal of the sprinkling machine; the central processing module obtains the irrigation depth during full-speed operation based on the basic information so as to form a corresponding target percentage signal or an adjusted target percentage signal, and the percentage output module converts the target percentage signal into a first timing switch signal so as to drive the sprinkling machine to operate; and when the operation direction of the translation type sprinkling machine deviates, the adjusted target percentage signal is converted into a second timing switch signal to be output through the two percentage output terminals, so that automatic guiding of the translation type sprinkling machine is realized.

Description

Technical Field

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

[0002] In the field of water-saving irrigation, large sprinklers are widely used. The main types of large sprinklers include center pivot sprinklers and translation sprinklers. These two types of sprinklers generally use percentage timers for operation control. By changing the time ratio of the large sprinkler to go and stop within one minute, the operation speed of the large sprinkler is adjusted, so as to achieve the purpose of adjusting the rainfall depth of the large sprinkler. In actual use, the user calculates the percentage value according to the required irrigation volume, sets the percentage by adjusting the dial knob, etc., and starts the sprinkler for irrigation. In order to ensure that the translation sprinkler runs according to the water supply channel or the designed path, compared with the center pivot sprinkler, it is necessary to use a percentage timer or a percentage timer and peripheral electrical logic at the locomotive end and the span end, combined with the running direction and offset state to start or stop the operation of the corresponding end, so as to realize the sprinkler walking along the water supply channel or the designed path (guide control). The control system of the existing large sprinkler is complex and needs to be improved. 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] To this end, the purpose of the present invention is to provide a percentage timer for a large sprinkler to effectively reduce the complexity of a sprinkler control system, especially a translational sprinkler control system.

[0005] To achieve the above-mentioned purpose, the present invention proposes a large-scale sprinkler irrigation machine percentage timer, including a human-computer interaction module, a state 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, which includes the sprinkler type, inflow flow, sprinkler span length, cantilever length, tail gun spraying radius, sprinkler running speed, and sprinkler running 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 used to obtain the irrigation depth when running at full speed based on the basic information, obtain the target percentage based on the irrigation depth when running at full speed and a given irrigation depth, and form a target percentage signal with the target percentage as a duty cycle and a given period; and is also used to adjust the target percentage signal based on the operating state signal to obtain an adjusted target percentage signal for the translational sprinkler when a deviation in the operating direction occurs;

[0009] 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 translational sprinkler deviates from the 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 realize automatic guidance of the translational sprinkler.

[0010] In the percentage timer of the large sprinkler 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 the center-pivot sprinkler, in the case of full-circle operation, 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 week 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; the corresponding target percentage is obtained based on the first irrigation depth and the given irrigation depth of the sprinkler.

[0011] In the percentage timer of the large sprinkler 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; 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 guide modulation wave, the period and duty cycle of the guide modulation wave are adjustable, and the guide 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 the translational sprinkler, when the running direction deviates, the target percentage signal is adjusted based on the running state signal to obtain the adjusted target percentage signal, including: for the translational sprinkler, if the locomotive direction signal input terminal of the translational sprinkler is high level, the corresponding target percentage signal is modulated by the guide modulation wave to obtain the corresponding adjusted target percentage signal, and the adjusted target percentage signal is converted into the second timing switch signal output through the second percentage output terminal, and the first percentage output terminal keeps outputting the target percentage signal. The first timing switch signal corresponding to the percentage signal; if the signal input terminal of the translational sprinkler machine 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 large-scale sprinkler irrigation machine percentage timer provided by the present invention also includes a communication module, and the communication module 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 large sprinkler percentage timer provided by the present invention, the communication module is also used to obtain relevant sensor information through the corresponding communication terminal, and the relevant sensor information includes GNSS positioning, orientation information, operation 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 large-scale sprinkler irrigation machine percentage timer provided by the present invention also includes an encoder, and the encoder adopts a physical knob.

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

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will 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 easily 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 connection diagram 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 by an embodiment of the present invention;

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

[0027] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments of the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present invention as detailed in the appended claims.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the 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 technical features indicated. Thus, 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 "multiple" 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] Embodiments of the present invention are described in detail below, 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 should not 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 of a translation sprinkler. The percentage timer for a large sprinkler in the present invention can be referred to as a percentage timer.

[0032] Figure 1 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 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 A connection diagram of a percentage timer for a large sprinkler provided in an embodiment of the present invention.

[0033] like Figure 1 As shown, the percentage timer of the large sprinkler irrigation machine includes a human-machine interaction module, a state signal input module, a central processing module, and a percentage output module. The human-machine interaction module and the state 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 may 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. The display screen is used to input settings and send the input settings to the central processing module. The display screen is also used to display the operating status of the sprinkler, etc. The display screen provides an intuitive graphical user interface, allowing users to easily input and modify basic information of the sprinkler, and after saving the input or modified settings, the percentage output value is displayed after the system automatically calculates it.

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

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

[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 given value. As the user rotates the encoder, the corresponding percentage value on the display is updated in real time, providing a quick way to adjust. 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, which improves the flexibility and accuracy of user interaction.

[0042] In this embodiment, the display screen 1 and the encoder 2 integrate an intuitive human-machine interface to achieve the setting and display of the current operating status. The rotation direction of the encoder matches the increase and decrease direction of the percentage value. Clockwise rotation increases the percentage, and counterclockwise rotation decreases the percentage. When setting other parameters, they are also adjusted by rotating the encoder. After setting, short press the encoder button to exit the value adjustment. The display provides hierarchical menus and options, and the main interface provides common parameter setting items. The human-machine interface provides options that allow users to switch the control and indication functions of the percentage output according to the type of sprinkler used. Whether in a center pivot sprinkler or a translation sprinkler, the human-machine interface will display the current percentage output value in real time, as well as the operating status and fault information of the sprinkler, which is convenient for users to monitor and maintain. The setting parameters and calculation results can be saved and directly called the next time they are used, reducing repeated input and improving efficiency. Through the human-machine interface, you can set the maximum timing time 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 used instead of a percentage by switching, and 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 also includes a mounting bolt 3 and a housing 18 (see Figure 2 (b)). The fixing bolts 3 are used 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 shown in FIG. Figure 2 As shown in (c).

[0045] In this embodiment, the timer also 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 shown in (c) are provided. 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, the second power input terminal 5 is the other pole of the corresponding AC or DC.

[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 on the bottom surface of the housing 18 shown in (c) are shown in FIG. The percentage output module converts 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 translational 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 the automatic guidance of the translational sprinkler.

[0047] In this embodiment, the state signal input module is used to obtain the operation state signal of the sprinkler. The state signal input module includes a forward operation signal input terminal, a reverse operation signal input terminal, a synchronization signal terminal, a translational sprinkler deflection span direction signal input terminal, and a translational 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 arranged on the bottom surface shown in (c) includes a forward operation signal input terminal 8, a reverse operation signal input terminal 9, a translational sprinkler deflection span direction signal input terminal 10, a translational 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 translational sprinkler deflection span direction signal input terminal 10 is used to receive a translational sprinkler deflection span direction signal input. The translational sprinkler deflection locomotive direction signal input terminal 11 is used to receive a translational sprinkler deflection locomotive direction signal input. The synchronization signal terminal 12 is used to receive a synchronization signal input.

[0049] Figure 4 The following is a schematic diagram of the operation of the translational sprinkler provided by the embodiment of the present invention. Figure 4As shown, the translational sprinkler includes a locomotive, a span, a water pipe arranged on the span, and tires arranged on the locomotive and the span. The locomotive moves forward or backward along the water supply channel or the designed path on the canal edge, thereby driving the span forward or backward to realize the forward or backward movement of the sprinkler. Wherein the forward movement indicates that the sprinkler is currently running in the forward direction, and the backward movement indicates that the sprinkler is currently running in the reverse direction. When the sprinkler deviates from the planned path, it is divided into left deviation and right deviation. Wherein the left deviation indicates that the sprinkler is currently biased in the direction of the locomotive. The right side indicates that the sprinkler is currently biased in the direction of the span. In addition, it can be defined as a boundary signal by setting: indicating whether the sprinkler is close to the boundary of the direction of travel of the working area, which is divided into a forward boundary and a reverse boundary; the synchronous operation of multiple spans is that multiple spans approach the same boundary at the same time. When multiple spans are synchronously operated, a span synchronization signal is generated, and the synchronization signal received by the synchronization signal terminal 12 when multiple spans are synchronously operated is a span synchronization signal. It should be noted that when the synchronization is lost and normal operation cannot be performed, it is out of synchronization. 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 given is that of water supply through canals, and the same is true for water supply through trailed pipes.

[0050] In this embodiment, the central processing module is used to obtain the irrigation depth when running at full speed based on basic information, obtain the target percentage based on the irrigation depth when running at full speed and the given irrigation depth, and form a target percentage signal with the target percentage as the duty cycle and a given period; it is also used to adjust the target percentage signal based on the operating status signal for the translational sprinkler when a deviation in the operating direction occurs to obtain an adjusted target percentage signal.

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

[0052] For the center pivot sprinkler, in the case of full circle operation, the first sprinkler coverage area is obtained based on the sprinkler span length, cantilever length, and tail gun spraying radius; the first shortest time for the sprinkler to run a circle 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; the corresponding target percentage is obtained based on the first irrigation depth and the given irrigation depth;

[0053] For the translational sprinkler, the second sprinkler coverage area is obtained based on the sprinkler running length, sprinkler span length, cantilever length, and tail gun spraying radius; the second shortest time of the sprinkler is obtained based on the sprinkler running length and sprinkler running speed; the second irrigation depth when running at full speed is obtained based on the inflow flow, the second sprinkler coverage area, and the second shortest time; 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 realizing 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 spraying 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 spraying radius.

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

[0060]

[0061] Where, L p v is the span length of the sprinkler; e is the operating speed of the sprinkler. The operating speed of the sprinkler depends on the walking 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, and the corresponding target percentage xw1 satisfy:

[0066]

[0067] In the formula, h w It is the given irrigation depth of the pivot.

[0068] 2) For center pivot sprinklers, the sprinkler operating angle can be used to make 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, and the ratio of the arc length to the sprinkler operating speed is used to obtain the corresponding first shortest time, and then the corresponding target percentage is obtained by referring to the calculation process when running in a full circle as described above.

[0069] 3) For lateral sprinkler irrigation machines:

[0070] The coverage area of ​​the second sprinkler is obtained based on the sprinkler running 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 spraying 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 v is the operating length of the sprinkler; e is the operating speed of the sprinkler. The calculation of the operating speed of the sprinkler can refer 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] In the formula, h w It is the given irrigation depth of the pivot.

[0082] In this embodiment, in the central processing module, a flexible output allocation mechanism is designed in consideration of the working principles and control requirements of different sprinklers to adapt to different operating strategies of the center pivot sprinkler and the translation sprinkler.

[0083] For center pivot sprinklers: users can choose to use the first percentage output terminal or the second percentage output terminal through the human-computer interaction module, and output the first timing switch signal converted based on the target percentage signal to directly control the operating speed of the sprinkler. The other unselected percentage output is used for auxiliary control linkage output according to the travel position, such as controlling the operation and stop of the tail gun and fertilizer spreader. 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.

[0084] 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:

[0085] For a translational sprinkler, if the translational sprinkler deflection locomotive direction signal input terminal 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, 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 converted by the target percentage signal;

[0086] 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, and the adjusted target percentage signal is converted into the second timing switch signal output through the first percentage output terminal, and 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, based on three input signals: running direction, deviation direction and synchronization signal, the outputs of two percentage output terminals (first percentage output terminal 6 and first percentage output terminal 7) are determined, thereby achieving precise running control.

[0089] For a translational sprinkler, the forward running signal input terminal 8, the reverse running signal input terminal 9, the translational sprinkler deviation span direction signal input terminal 10, the translational 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 deviation (i.e., the input terminal of the signal for the translational sprinkler to deviate to the locomotive direction is at a high level), 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 deviation (i.e., the signal input terminal of the translational sprinkler is at a high level), 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 keeps outputting the first timing switch signal converted from the target percentage signal to correct the driving trajectory of the sprinkler.

[0092] 3) In the case of normal driving 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 The target percentage signal adjustment diagram provided by the embodiment of the present invention is shown in FIG. 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 in (b) is modulated (i.e. adjusted), Figure 5 The adjusted target percentage signal shown in (c) in FIG. 1 is a schematic diagram of a conventional fully closed percentage output. In this case, compared with the conventional fully closed percentage output, the present invention adjusts the target percentage signal output according to the guide modulation wave, effectively correcting the deviation while preventing the locomotive and truss mechanism from being damaged due to the failure to release stress during the adjustment process. The guide modulation wave period and duty cycle are saved as system parameters and adjusted according to the equipment length and operating conditions to achieve the best effect.

[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), the RF / LTE communication module includes Figure 2 The second wireless antenna interface 17 shown in (c) is RS485 / CAN communication module. Figure 2 As shown in (c) above, the first communication terminal 13 and the second communication terminal 14 may use A+ / H of RS485 / CAN, and the second communication terminal 14 may use 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 the user to set the water supply pressure waiting threshold through the human-computer interface (i.e., through the human-computer interaction module or encoder), and after the pressure sensor (the pressure sensor detects the water supply pressure entering the machine) is connected to the communication port, 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 outputting to avoid uneven irrigation caused by running 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) Waterless operation mode setting: Also through the human-machine interface, the user can choose to enable the waterless operation mode. In this mode, the system will shield the monitoring of the inlet pressure, and the percentage output will not stop automatically even in the absence of water or low water pressure, in order to meet some special irrigation needs or test purposes.

[0103] 3) Real-time pressure monitoring: The system monitors the inlet pressure in real time. Once the pressure is lower than the preset waiting threshold, the corresponding control action is immediately triggered, such as stopping the output of each percentage. The pressure data and system status are displayed in real time through the human-machine interface, which is convenient for users to monitor and adjust.

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

[0105] In this embodiment, the communication module is used to obtain the power supply voltage of the sprinkler 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 power supply voltage and voltage threshold of the sprinkler. Specifically, similar to the machine input pressure monitoring mechanism, the present invention allows the user to set the power supply waiting threshold through the human-machine interface, and after the communication port is connected to the voltage sensor, the percentage output state or alarm is dynamically adjusted according to the real-time power 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 also includes a protective ground terminal 15.

[0108] In this embodiment, the timer also 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 to achieve automatic adjustment of the percentage output and linkage control 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 also used to control the operation and stop of the sprinkler based on the inflow flow of the sprinkler and the inflow flow threshold.

[0111] In some embodiments, the set inbound 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 irrigation machine is also applicable to the control method of the percentage timer for a large sprinkler irrigation machine of this embodiment, which will not be repeated here.

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

[0115] The percentage timer of a large sprinkler 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 the basic information of the sprinkler, the basic information includes the sprinkler type, the flow rate into the machine, the span length of the sprinkler, the cantilever length, the tail gun spraying radius, the sprinkler running speed, the sprinkler running length, and the sprinkler type includes a central pivot type and a translation type; the status signal input module is used to obtain the running 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; it is also used for adjusting the target percentage signal based on the operating status signal to obtain an adjusted target percentage signal for a translational sprinkler when a deviation in the operating direction occurs; a 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 a deviation in the operating direction occurs for the translational sprinkler, 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 translation sprinklers, and has corresponding control functions for different types of sprinklers. In particular, for translation sprinklers, the timing switch signal output is adjusted in combination with the operating status signal when the translation sprinkler deviates from its trajectory to perform guidance control; compared with the complex control system of existing sprinklers, the complexity of the sprinkler control system, especially the translation sprinkler control system, is effectively reduced.

[0116] The timer of the present invention is provided with a rotary encoder with a confirmation button, a display screen; a group of power terminals, two percentage output terminals, five status input terminals, a group of RS485 communication segments, two antenna adapters, and a protective grounding terminal. The housing is provided with panel mounting fixing bolts. It has two-way percentage timing output; supports center-shaft sprinkler irrigation machines and translation sprinkler irrigation machines, and has a translation sprinkler irrigation machine guidance control function; has a communication interface to connect sensors and access the Internet of Things. Through the timer of the present invention, the complexity of the sprinkler irrigation control system, especially the translation sprinkler irrigation control system, is effectively reduced, the equipment cost is effectively reduced, the digitization and intelligence of the equipment are improved, water resources are saved in agricultural production, and economic and ecological benefits are improved.

[0117] The accompanying drawings show a schematic diagram of the structure of the embodiment disclosed in the present invention. These figures are not drawn to scale, and some details are magnified for the purpose of clear expression, and some details may be omitted. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships between them are only exemplary, and may be deviated due to manufacturing tolerances or technical limitations in practice, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs. It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in the present invention can be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solution disclosed in the present invention can be achieved, the present invention is not limited here. The above specific implementation does not constitute a limitation on the scope of protection of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection 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, which includes the sprinkler type, inflow flow, sprinkler span length, cantilever length, tail gun spraying radius, sprinkler running speed, and sprinkler running 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; The central processing module is used to obtain the irrigation depth when running at full speed based on the basic information, obtain the target percentage based on the irrigation depth when running at full speed and a given irrigation depth, and form a target percentage signal with the target percentage as a duty cycle and a given period; It is also used for adjusting the target percentage signal based on the operating state signal to obtain an adjusted target percentage signal for a translational sprinkler when a deviation in the operating direction occurs; 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 translational sprinkler deviates from the 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 realize automatic guidance of the translational sprinkler.

2. The large sprinkler irrigation machine percentage timer according to claim 1, characterized in that: In the central processing module, the watering depth when running at full speed is obtained based on the basic information, and the target percentage is obtained based on the watering depth when running at full speed and a given watering 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 the first shortest time for one operation of the sprinkler machine based on the span length of the sprinkler machine and the operation speed of the sprinkler machine; Obtaining a first irrigation depth when running 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 large sprinkler irrigation machine percentage timer according to claim 1, characterized in that: In the central processing module, the watering depth when running at full speed is obtained based on the basic information, and the target percentage is obtained based on the watering depth when running at full speed and a given watering depth, including: For a translational sprinkler, the coverage area of ​​the second sprinkler is obtained based on the running length of the sprinkler, the span length of the sprinkler, the cantilever length, and the tail gun spraying radius; Obtaining the second shortest time of the sprinkler based on the sprinkler operation length and the sprinkler operation speed; Obtaining a second watering depth when running at full speed based on the inflow flow, the second watering machine coverage area, 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 large sprinkler irrigation machine percentage timer 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 large sprinkler irrigation machine percentage timer according to claim 4, characterized in that: The status signal input module includes a forward operation signal input terminal, a reverse operation signal input terminal, a translational sprinkler machine deflection span direction signal input terminal, a translational sprinkler machine 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 machine deflection span direction signal, a translational sprinkler machine deflection locomotive direction signal, and a synchronization signal.

6. The large sprinkler irrigation machine percentage timer according to claim 5, characterized in that: 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 at a high level, the corresponding target percentage signal is modulated by the guide modulation wave to obtain the 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; 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, and the adjusted target percentage signal is converted 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.

7. The large sprinkler irrigation machine percentage timer according to claim 1, characterized in that: It also includes a communication module, which includes a plurality of communication terminals and a plurality of wireless antenna interfaces.

8. The large sprinkler irrigation machine percentage timer according to claim 7, characterized in that: 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.

9. The large sprinkler irrigation machine percentage timer according to claim 7, 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, operation 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.

10. The large sprinkler irrigation machine percentage timer according to claim 1, characterized in that: An encoder is also included, which employs a physical knob.

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