Controller for maintenance of lawn grass roots in football field

Abstract

The utility model provides a controller for maintenance of lawn grass roots of a football field. The controller comprises a PLC circuit, a wiring module, a dual-network-port gateway, a shell and a mounting plate, the PLC circuit is connected with the wiring module, the wiring module is connected with at least one external device, the PLC circuit is fixed in the shell through the mounting plate, and the wiring module is fixed on the mounting plate; the external equipment comprises at least one field sensor, at least one field temperature sensor, at least one switching value, at least one frequency converter, at least one actuator and at least one computer equipment; the switching value refers to equipment for realizing acquisition and output of discontinuous signals; the dual-network-port gateway is fixed on the shell; the dual-network-port gateway comprises a first network port and a second network port, the first network port is used for being connected with a first network, the second network port is used for being connected with a second network, and the first network and the second network are different network operating systems. The method has the beneficial effect that the operation efficiency of equipment maintenance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a controller for maintaining grass roots in a football field. Background Art

[0002] The roots of the turf grass on the football field need to be professionally maintained to meet the standards required for football. Therefore, it is necessary to use one or more maintenance equipment including field sensors, field temperature sensors, switching quantities, frequency converters, actuators, and computer equipment to maintain the turf.

[0003] However, the inventors have found that due to the wide variety and large number of maintenance equipment, multiple servers or terminals need to be used to connect to each maintenance equipment respectively in order to maintain the lawn, resulting in low operating efficiency of the maintenance equipment. Utility Model Content

[0004] The present application provides a controller for maintaining the roots of a football field lawn, so as to solve the problem of low operating efficiency of maintenance equipment.

[0005] The present application provides a controller for maintaining the grass roots of a football field lawn, comprising: a PLC circuit, a wiring module, a dual-network-port gateway, a housing, and a mounting plate;

[0006] The PLC circuit is connected to the wiring module, the wiring module is connected to at least one external device, the PLC circuit is fixed inside the housing through the mounting plate, and the wiring module is fixed to the mounting plate; the external device includes: at least one field sensor, at least one field temperature sensor, at least one switch quantity, at least one frequency converter, at least one actuator, and at least one computer device; the switch quantity refers to a device used to realize the acquisition and output of discontinuous signals;

[0007] The dual network port gateway is fixed on the housing;

[0008] The dual-network-port gateway includes: a first network port and a second network port, wherein the first network port is used to connect to a first network, and the second network port is used to connect to a second network, and the first network and the second network have different network operating systems.

[0009] In the above solution, the PLC circuit includes: a central processing unit and at least one memory stick;

[0010] The central processing unit is connected to at least one of the memory bars, and the central processing unit is also connected to the dual-network-port gateway.

[0011] In the above solution, the wiring module includes: a first wiring bank, a second wiring bank and a third wiring bank;

[0012] The first wiring row and the second wiring row are fixed on one side of the housing;

[0013] The third terminal block is fixed on the other side of the housing;

[0014] The dual-network-port gateway is located at a side of the housing on which the third wiring block is fixed.

[0015] In the above solution, the first wiring bank has at least one DI terminal;

[0016] The second terminal block has at least one UI terminal and at least one RS485 terminal;

[0017] The third terminal block has at least one DC terminal, at least one DO terminal, and at least one AO ​​terminal.

[0018] In the above scheme, the UI terminal is used to connect with the field sensor, field temperature sensor, switch quantity, frequency converter, and actuator;

[0019] The DI terminal is used to connect to a switch quantity;

[0020] The DO terminal is used to connect to a switch quantity;

[0021] The AO terminal is used to connect with field sensors, frequency converters and actuators;

[0022] The RS485 terminal is used to connect to computer equipment;

[0023] The DC terminal is used to connect to a power source.

[0024] In the above solution, the dual-port gateway includes: two Ethernet modules; or

[0025] One Ethernet module and one serial port module; or

[0026] Two serial port modules.

[0027] In the above solution, the first network port is connected to one of the two Ethernet modules, and the second network port is connected to the other of the two Ethernet modules; or

[0028] The first network port is connected to the Ethernet module of the one Ethernet module and the one serial port module, and the second network port is connected to the serial port module of the one Ethernet module and the one serial port module; or

[0029] The first network port is connected to one of the two serial port modules, and the second network port is connected to the other of the two serial port modules.

[0030] In the above solution, the mounting plate comprises: a plate body, at least one slot and at least one fixing hole;

[0031] The side edge of the plate is connected to the inner side of the shell;

[0032] The central processing unit is fixed on the board through at least one of the fixing holes;

[0033] Each of the memory bars is fixed on the board through one of the slots;

[0034] The wiring module is fixed on the plate body through at least one of the fixing holes.

[0035] In the above solution, the mounting plate further comprises at least one wiring terminal;

[0036] The central processing unit is connected to one of the memory bars via at least one of the connection terminals;

[0037] The central processing unit is connected to the dual-network-port gateway via at least one of the wiring terminals.

[0038] In the above solution, the housing has at least one guide rail and at least one ventilation hole;

[0039] The two guide rails are arranged opposite to each other inside the housing and form a guide rail pair;

[0040] Two side edges of the plate body of the mounting plate are respectively connected to two guide rails of one guide rail pair;

[0041] The ventilation hole communicates with the inside of the shell and the outside.

[0042] The present application provides a controller for maintaining the roots of lawn grass in a football field, which realizes the control of the lawn grass root maintenance equipment in the football field based on a terminal in a server or a network operating system, thereby improving the operating efficiency of the maintenance equipment.

[0043] Users can control PLC circuits through a terminal based on network operating systems in different scenarios to achieve the technical effect of separately controlling a large number of maintenance equipment, and achieve the technical effect of centralized control and management of maintenance equipment based on the network in multiple scenarios. It not only achieves the beneficial effect of expanding the control scenarios of PLC circuits, but also because users can control maintenance equipment at any time in different scenarios using the network operating systems of each scenario, it achieves the beneficial effect of improving the management efficiency of maintenance equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] Figure 1 A schematic diagram of a top view of a controller for maintaining grass roots on a football field provided in an embodiment of the present application;

[0046] Figure 2 A schematic diagram of the side structure of a controller for maintaining grass roots in a football field provided in an embodiment of the present application;

[0047] Figure 3 A schematic block diagram of the structure of a PLC circuit, a dual-port gateway, a mounting plate and a guide rail in a controller for maintaining the roots of a football field lawn provided in an embodiment of the present application;

[0048] Figure 4 A schematic diagram of the structure of the voltage signal input connection between the controller and the field sensor provided in the embodiment of the present application;

[0049] Figure 5 A schematic diagram of a two-wire current signal input wiring structure between a controller and a field sensor provided in an embodiment of the present application;

[0050] Figure 6 A schematic diagram of the structure of a three-wire current signal input connection between a controller and a field sensor provided in an embodiment of the present application;

[0051] Figure 7 A schematic diagram of the structure of a four-wire current signal input connection between a controller and a field sensor provided in an embodiment of the present application;

[0052] Figure 8 A schematic diagram of the structure of thermistor input wiring between the controller and the field temperature sensor provided in an embodiment of the present application;

[0053] Fig. 9 A schematic diagram of the structure of the input connection between the controller and the switch quantity provided in the embodiment of the present application;

[0054] Fig.10 A schematic diagram of the structure of the input connection between the controller and the switch quantity provided in the embodiment of the present application;

[0055] Fig.11 A schematic diagram of the structure of the AO output connection between the controller and the frequency converter or actuator provided in an embodiment of the present application;

[0056] Fig.12 A schematic diagram of the structure of the AO output connection between the controller and the field sensor provided in the embodiment of the present application;

[0057] Fig.13 A schematic diagram of the structure of the DO output connection between the controller and the switch quantity provided in the embodiment of the present application;

[0058] Fig.14 A schematic diagram of the structure of the DO output connection between the controller and the switch quantity and the relay provided in the embodiment of the present application.

[0059] Reference numerals:

[0060] 1: PLC circuit;

[0061] 2: Wiring module;

[0062] 3: Dual network port gateway;

[0063] 4: Shell;

[0064] 5: Mounting plate;

[0065] 11: CPU;

[0066] 12: Memory stick;

[0067] 21: First terminal block;

[0068] 22: Second terminal block;

[0069] 23: The third terminal block;

[0070] 31: The first network port;

[0071] 32: Second network port;

[0072] 41: guide rail;

[0073] 42: Ventilation holes;

[0074] 411: Connecting bolt;

[0075] 412: U-shaped groove;

[0076] 51: plate body;

[0077] 52: slot;

[0078] 53: fixed hole;

[0079] 54: Terminal block.

[0080] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0081] 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, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0082] The following specific embodiments are used to describe in detail the technical solutions of the embodiments of the present application and how the technical solutions of the embodiments of the present application solve the current problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0083] See also Figure 1-Figure 3 , the embodiment of the present application provides a controller for maintaining the grass roots of a football field lawn, including: a PLC circuit 1, a wiring module 2, a dual-network-port gateway 3, a housing 4 and a mounting plate 5;

[0084] The PLC circuit 1 is connected to the wiring module 2, and the wiring module 2 is connected to at least one maintenance device. The PLC circuit 1 is fixed inside the housing 4 through the mounting plate 5, and the wiring module 2 is fixed on the mounting plate 5; the maintenance device includes: at least one field sensor, at least one field temperature sensor, at least one switch quantity, at least one frequency converter, at least one actuator, and at least one computer device; the switch quantity refers to a device used to realize the acquisition and output of discontinuous signals;

[0085] The dual network port gateway 3 is fixed on the housing 4;

[0086] The dual network port gateway 3 includes: a first network port 31 and a second network port 32, wherein the first network port 31 is used to connect to a first network, and the second network port 32 is used to connect to a second network, and the first network and the second network have different network operating systems.

[0087] In an exemplary embodiment, at least one field sensor, at least one field temperature sensor, at least one switch, at least one frequency converter, at least one actuator, and at least one computer device in the maintenance equipment are industrial equipment used to maintain the roots of the lawn of a football field. By connecting the PLC circuit 1 with the wiring module 2, information interaction is realized between the PLC circuit 1 and the wiring module 2, and the football field lawn grass root maintenance equipment can be controlled based on a terminal in a server or a network operating system, thereby improving the operating efficiency of the maintenance equipment.

[0088] By connecting the wiring module 2 with the dual network port gateway 3, so as to establish a communication connection between the dual network port gateway 3 and different network operating systems, the user can control the PLC circuit 1 through different network operating systems, thereby achieving the beneficial effect of controlling the PLC circuit 1 through multiple different network operating systems.

[0089] The network operating system transmits data and various messages to each other through the network, and is divided into a server and a client. The main function of the server is to manage the sharing of various resources and network devices on the server and the network, integrate and control the flow, and avoid the possibility of paralysis; while the client has the function of receiving the data transmitted by the server for use, so that the user can clearly search for the required resources. In this embodiment, the user controls the PLC circuit 1 by operating the client.

[0090] The maintenance device is a device used to be controlled by the PLC circuit 1, such as: contactors, solenoid valves, regulating valves, speed control devices, indicator lights, digital displays and alarm devices, etc.; by connecting a PLC circuit 1 with at least one maintenance device, a PLC circuit 1 can control at least one maintenance device.

[0091] By fixing the PLC circuit 1 and the wiring module 2 on the mounting plate 5 and fixing the mounting plate 5 inside the shell 44, the PLC circuit 1 can be stably fixed inside the shell 44 and the wiring module 2 can be firmly installed on the shell 4.

[0092] Therefore, the user can control the PLC circuit 1 through a terminal based on the network operating system in different scenarios to achieve the technical effect of separately controlling a large number of maintenance equipment, and achieve the technical effect of centralized control and management of maintenance equipment based on the network in multiple scenarios. It not only achieves the beneficial effect of expanding the control scenario of the PLC circuit 1, but also because the user can control the maintenance equipment at any time in different scenarios using the network operating system of each scenario, it achieves the beneficial effect of improving the management efficiency of the maintenance equipment.

[0093] In a preferred embodiment, the PLC circuit 1 comprises: a central processing unit 11 and at least one memory bar 12;

[0094] The central processor 11 is connected to at least one of the memory bars 12 , and the central processor 11 is also connected to the dual-network-port gateway 3 .

[0095] In this example, the control object of the PLC circuit 1 is controlled and processed by the central processing unit 11, and the memory stick 12 is used to store data generated and called by the central processing unit 11 during operation.

[0096] Specifically, a central processing unit 11 is used as the central processing unit 11. The central processing unit 11 (Central Processing Unit, referred to as CPU) is the computing and control core of the computer system and the final execution unit of information processing and program operation. The central processing unit 11 has built-in software function modules of different types and quantities, and has the following basic functions: proportion, proportion + integral, proportion + integral + differential, on / off, time weighting, sequence, arithmetic, logical comparison, counter, etc. For applications with complex control requirements, advanced control algorithms should also be provided. Through flexible configuration, the needs of most intelligent building monitoring can be met. The central processing unit 11 has a built-in embedded operating system based on the Internet of Things, which can greatly improve the real-time and scalability of the operation of the central processing unit 11.

[0097] Memory is also called internal storage. It is used to temporarily store the calculation data in the CPU and the data exchanged with external storage such as hard disk. As long as the computer is running, the CPU will transfer the data to be calculated to the memory for calculation. When the calculation is completed, the CPU will transmit the result. The operation of the memory also determines the stable operation of the computer.

[0098] In a preferred embodiment, the wiring module 2 includes: a first wiring bank 21, a second wiring bank 22 and a third wiring bank 23;

[0099] The first wiring row 21 and the second wiring row 22 are fixed on one side of the housing 4;

[0100] The third wiring row 23 is fixed on the other side of the housing 4;

[0101] The dual-network-port gateway 3 is located at a side of the housing 4 where the third wiring block 23 is fixed.

[0102] In this example, the first wiring block 21 and the second wiring block 22 are arranged on one side of the shell 4, and the third wiring block 23 and the dual-port gateway 3 are arranged on the other side of the shell 4, so as to achieve a reasonable layout of the wiring blocks and the gateway, so that the wiring blocks and the gateway are compactly arranged on the shell 4.

[0103] Further, the first wiring row 21 has at least one DI terminal;

[0104] The second wiring row 22 has at least one UI terminal and at least one RS485 terminal;

[0105] The third wiring bar 23 has at least one DC terminal, at least one DO terminal and at least one AO ​​terminal.

[0106] In this example, the first wiring row 21 includes six DI terminals; the second wiring row 22 includes three UI terminals and three RS485 terminals; the third wiring row 23 includes one DC terminal, four DO terminals and one AO ​​terminal.

[0107] It should be noted that the UI terminal is used to receive voltage signals, which include: instantaneous stop signal, pause signal, safe speed signal, cycle stop signal, alarm release signal, external start signal, HOME input signal, enable signal, filter signal and automatic operation start signal.

[0108] The instantaneous stop signal is used to cut off the servo power supply through software. The IMSTP input is always valid and is usually ON. If the signal becomes OFF, the system performs the following processing: 1. Disconnect the servo power supply after issuing an alarm.

[0109] The pause signal is used to issue a pause command from an external device. The HOLD input is always valid and is usually ON. When this signal becomes OFF, the system performs the following processing: 1. Decelerates and stops the action in progress, interrupting the execution of the program. 2. When "Servo during pause" is set to valid in the general settings, an alarm is issued and the servo power is disconnected after the robot stops.

[0110] The safety speed signal is used to stop the robot when the safety fence door is opened. This signal is usually connected to the safety latch of the safety fence door. The SFSPD input is always valid and is usually ON. If the IMSTP, *HOLD, and *SFSPD signals are not used, these signal lines are connected across (normally closed points).

[0111] The cycle stop signal is used to terminate the currently executing program (always valid). Use RSR to release the program in the standby state. If "After CSTOPI input, the program is forced to end" is set to invalid in the system setting screen [6 System Settings, System Settings], the currently executing program will be executed to the end and then terminated. Use RSR to release (clear) the program in the standby state. (Standard setting)

[0112] The alarm release signal is used to release the alarm and is always valid. When the servo power is disconnected, turn on the servo power. At this time, the alarm will not be released before the servo device starts. This signal works when the signal is disconnected under the default setting.

[0113] The external start signal is used for external start. (The falling edge of the signal is valid).

[0114] The HOME input signal is used to return to the home page.

[0115] The enable signal is used to power on the robot motor during remote start.

[0116] The filter signal is used when the PNS selects the program name. When UI

[17] = ON, it allows the PNS1-PNS8 signals to be read and converted into decimal to identify the PNS program name.

[0117] The automatic operation start signal is used to start the currently selected program from the first line. The falling edge of the signal is effective. When used with PNS, the program selected by PNS is executed from the first line. When not used with PNS, the program selected by the teaching operation panel is executed from the first line. When other programs are being executed or paused, this signal is ignored.

[0118] The DI terminal is used to receive DI signals. DI signals are digital input signals. The so-called digital signals are high level 1 and low level 0, which means open or closed in control. DI is an input signal of a switch quantity, giving PLC or DCS an open and close command, just like a normally open start button switch. Pressing it is a closed signal. It is often used for status display. For example, when the circuit breaker is closed, it will be displayed as closed on the DCS screen.

[0119] The DO terminal is used to output DO signals. DO signals are digital output signals, which are switch output signals. That is, the PLC sends a start or stop signal to the device to start the device. For example, the start of the motor is determined by the DCS to send a start command, the motor control circuit is connected, the contactor is energized and the motor starts. The function is the same as the start button.

[0120] The AI ​​terminal is used to receive AI signals. AI signals are analog inputs. The so-called analog quantity is a 4-20mA or 0-10V current or voltage signal. It is input into the DCS and, after transformation, is restored to its original value. For example, the current value is displayed in the DCS. The secondary value of the current transformer (5A) is converted into a 4-20mA signal (5A corresponds to 20mA) by a current transmitter and input into the DCS cabinet. After conversion, the actual current value is displayed in the DCS.

[0121] The AO terminal is used to output AO signal, which is analog output. AO is a 4-20mA or 0-10V signal output by DCS to control the operating parameters of the equipment. For example, the speed control process of the frequency converter, taking 40HZ as an example, through remote DCS control, it is considered that the given parameter value is: 40HZ, and the DCS also sends a corresponding analog current value within the range of 4-20mA (20mA corresponds to 50HZ). The signal is transmitted to the controller of the frequency converter, and the frequency converter runs at 40HZ as required.

[0122] The RS485 terminal is used to connect computers and maintenance equipment. RS485 is a universal communication standard that is widely used in data acquisition and control applications. One of its main advantages is that it allows multiple RS485 devices to be placed on the same bus, which allows multiple nodes to be connected to each other. It can be used to connect computers and maintenance equipment to achieve data transmission. When installing the RS485 interface, it is necessary to follow the specific wiring terminal 5454 instructions to wire it to ensure that the system can work properly. This article will introduce the detailed instructions of the RS485 wiring terminal 5454 and how to correctly install the RS485 interface.

[0123] The DC24 terminal is used to connect a DC24V external relay.

[0124] Specifically, see Figure 1 The terminal descriptions in wiring module 2 are shown in the following table.

[0125] Terminal wiring instructions for the first terminal block 21 (from left to right):

[0126]

[0127] Terminal wiring instructions for the second terminal block 22 (from left to right)

[0128]

[0129] Terminal wiring instructions for the second terminal block 22 (from left to right)

[0130]

[0131] It should be noted that the UI signal input mode is determined by the pin jumper. The UI can be set to analog input mode such as 0-10V, 4-20mA, 10K resistance temperature sensor, PT1000 temperature sensor, or dry contact switch input mode through the jumper. The UI terminal can be used for maintenance equipment such as field sensors and resistance field temperature sensors.

[0132] The pin jumper is used to determine the DO signal and AO signal input mode. The DO signal and AO signal can be set to analog output mode or dry contact switch output mode through the jumper.

[0133] Furthermore, the UI terminal is used to connect with a field sensor, a field temperature sensor, a switch, a frequency converter, and an actuator;

[0134] The DI terminal is used to connect to a switch quantity;

[0135] The DO terminal is used to connect to a switch quantity;

[0136] The AO terminal is used to connect with field sensors, frequency converters and actuators;

[0137] The RS485 terminal is used to connect to computer equipment;

[0138] The DC terminal is used to connect to a power source.

[0139] Exemplarily, (1) the controller is connected via a first voltage signal input, see Figure 4 , ( Figure 4-Figure 11 The controller is marked as controller in the figure), the voltage signal input wiring between the controller and the field sensor, GND represents ground, and UI represents signal input.

[0140] (2) Current signal input wiring, two-wire current signal input wiring between the controller and the field sensor, please refer to Figure 5 , GND represents ground, UI represents signal input.

[0141] For three-wire current signal input wiring between the controller and the field sensor, refer to Figure 6 , GND represents ground, UI represents signal input.

[0142] For the four-wire current signal input wiring between the controller and the field sensor, refer to Figure 7 , GND represents ground, UI represents signal input.

[0143] (3) Thermistor input wiring between the controller and the field temperature sensor, see Figure 8 , supports NTC10K and PT1000 thermistor input wiring, GND represents ground, UI represents signal input.

[0144] (4) Input wiring between the controller and the switch (passive), please refer to Fig. 9 , dry contact switch input wiring, GND represents ground, DI represents signal input.

[0145] For input wiring between the controller and the switch quantity (passive), please refer to Fig.10 , dry contact switch input wiring, GND represents ground, UI represents signal input.

[0146] (5) For AO output wiring between the controller and the inverter or actuator, please refer to Fig.11 (The inverter or actuator in the figure is represented by inverter / actuator), AO output wiring, AO represents 0~10VDC voltage output, and GND represents ground.

[0147] For AO output wiring between the controller and the field sensor (field in the figure), please refer to Fig.12, AO output wiring, UO+ represents 0~10VDC voltage output, UO- represents ground.

[0148] (6) DO output wiring between the controller and the switch quantity, please refer to Fig.13 , DO uses high-power relay output, DO represents normally open output, and COM represents the common terminal.

[0149] For DO output wiring between the controller and the switch and relay, please refer to Fig.14 , UO uses a high-power relay output, and UO2+ is connected to relay KA. It should be noted that the switch quantity refers to the equipment used to realize the collection and output of discontinuous signals.

[0150] Network cable: Recommended standard Category 6 network cable

[0151] RS485 network cable: 1.0mm2 or 1.5mm2 shielded twisted pair.

[0152] Power cord: minimum wire gauge 1.5mm2, maximum cable length 100m.

[0153] Voltage and current signal lines: minimum wire gauge 0.75mm2, maximum cable length 100m.

[0154] Thermistor input wire: minimum wire gauge 0.75mm2, generally require the total wiring resistance to be less than 3Ω, the following table shows the wire resistance parameters of wires with different cross-sections.

[0155] The controllers are wired in an Ethernet daisy chain topology. The length of the RJ45 Category 6 cable between two communication points should not exceed 100 meters. If it exceeds 100 meters, an Ethernet switch cascade or optical fiber communication should be used instead.

[0156] RS485 data lines must be twisted into pairs. It is strictly forbidden to use star connections and forked connections such as "┳, ╋, *" for wiring. A hand-in-hand bus structure must be used.

[0157] RS485 is used to connect with computers through serial communication. Serial communication refers to a communication method in which both parties communicate bit by bit and follow the timing. In serial communication, data is transmitted bit by bit in sequence, and each bit of data occupies a fixed length of time. In other words, information exchange between systems can be completed using a few communication lines. It is particularly suitable for long-distance communication between computers and computers, and between computers and peripherals. Serial communication is mostly used for serial transmission of data between systems (multi-master control systems), between devices (master control devices and auxiliary devices), and between devices (master control CPU and functional chips) to achieve data transmission and sharing.

[0158] Field sensors are used to detect the moisture content of the soil beneath the turf of a football field.

[0159] Field temperature sensors are used to detect the temperature of the soil under the turf of the football field.

[0160] The switch quantity is based on the acquisition and output of discontinuous signals to realize the discontinuous switch control of the water gun. The switch quantity refers to the acquisition and output of discontinuous signals, including remote control acquisition and remote control output. It has two states, 1 and 0, which is the switch property in the digital circuit, and in electricity it refers to the opening and closing of the circuit or the connection and disconnection of the contact. "Open" and "close" are the most basic and typical functions of electrical appliances. Generally, the switch quantity device realizes the output of the switch quantity through the internal relay. The water gun is a device used to spray water on the lawn of the football field. Therefore, the water gun output using the switch quantity is, for example, the first second is open, the second second is closed, the third second is open, and so on.

[0161] The variable-frequency drive (VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the motor's working power frequency. The frequency converter is used to control the water spraying frequency of the water spray gun's motor. The motor variable frequency drive is mainly composed of rectification (AC to DC), filtering, inversion (DC to AC), braking unit, drive unit, detection unit, microprocessor unit, etc.

[0162] The actuator is a combination of an actuator and a control valve in an automatic control system. The actuator is used to control the amount of water sprayed per unit time by the water spray gun.

[0163] In a preferred embodiment, the dual-port gateway 3 includes: two Ethernet modules; or

[0164] One Ethernet module and one serial port module; or

[0165] Two serial port modules.

[0166] In this example, the main function of the Ethernet module is to debug and de-debug the transmission signals on the Ethernet, and convert the signals into valid data that can be recognized and processed by the CPU. On the Ethernet, data is transmitted in differential form, which cannot be directly read by the processor, so the Ethernet module is needed to convert these signals into data forms such as 0 and 1 that the CPU can understand. In addition, some Ethernet modules also convert the data transmitted on the network according to the TCP / IP protocol.

[0167] Serial port module, used to realize serial communication between controller and server.

[0168] Further, the first network port 31 is connected to one of the two Ethernet modules, and the second network port 32 is connected to the other of the two Ethernet modules; or

[0169] The first network port 31 is connected to the Ethernet module of the one Ethernet module and the one serial port module, and the second network port 32 is connected to the serial port module of the one Ethernet module and the one serial port module; or

[0170] The first network port 31 is connected to one of the two serial port modules, and the second network port 32 is connected to the other of the two serial port modules.

[0171] In this example, by corresponding the two network ports to two Ethernet modules respectively, it is possible to control the PLC circuit 1 through the first network port 31 and the second network port 32 based on different Internet network operating systems, thereby expanding the network control scenario.

[0172] By corresponding the two network ports to the Ethernet module and the serial port module respectively, it is possible to control the controller based on the Internet network operating system, and directly control the controller based on the serial communication connection of the server, enriching the control scenarios of the controller.

[0173] By corresponding the two network ports to the two serial port modules respectively, the controller can be controlled based on different servers, thus expanding the number of control terminals of the controller.

[0174] In a preferred embodiment, the mounting plate 5 comprises: a plate body 51, at least one slot 52 and at least one fixing hole 53;

[0175] The side edge of the plate body 51 is connected to the inner side of the housing 4;

[0176] The central processing unit 11 is fixed on the plate body 51 through at least one of the fixing holes 53;

[0177] Each of the memory bars 12 is fixed on the board 51 through one of the slots 52;

[0178] The wiring module 2 is fixed on the plate body 51 via at least one fixing hole 53 .

[0179] In this example, by providing the fixing holes 53 , the firmness of the connection between the central processing unit 11 and the wiring module 2 on the board 51 is ensured.

[0180] The slot 52 is provided to ensure that the memory stick 12 can be connected to the board 51 .

[0181] Furthermore, the mounting plate 5 further includes at least one wiring terminal 54;

[0182] The central processing unit 11 is connected to one of the memory sticks 12 via at least one of the connection terminals 54;

[0183] The central processor 11 is connected to the dual-port gateway 3 via at least one of the wiring terminals 54 .

[0184] In this example, by setting the connection terminal 54, a communication connection is established between the central processing unit 11 and the memory stick 12 and the dual-port gateway 3, and a communication connection is established between the central processing unit 11 and the wiring module 2, thereby avoiding the situation where the central controller, the memory stick 12, and the wiring module 2 are connected by open wires, which makes the lines easily oxidized or damaged, and greatly ensures the service life of the controller.

[0185] In a preferred embodiment, the housing 4 has at least one guide rail 41 and at least one ventilation hole 42;

[0186] The two guide rails 41 are arranged opposite to each other inside the housing 4 and form a pair of guide rails 41;

[0187] The two side edges of the plate body 51 of the mounting plate 5 are respectively connected to the two guide rails 41 of one pair of guide rails 41;

[0188] The ventilation hole 42 communicates the inside of the housing 4 with the outside.

[0189] In this example, the guide rail 41 is provided so that the mounting plate 5 can be fixed inside the shell 4, so as to facilitate the removal and installation of the mounting plate 5; the ventilation holes 42 are provided so that the air convection formed by the heat dissipated by the PLC circuit 1 and the wiring module 2 inside the shell 4 can flow to the outside through the ventilation holes 42; at the same time, exemplarily, the guide rail 41 includes a connecting bolt 411 and a U-shaped groove 412, and the connecting bolt 411 passes through the U-shaped groove 412 and is connected to the mounting plate 5, so that the mounting plate 5 is fixed on the guide rail 41.

[0190] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0191] Those skilled in the art will readily come to other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application embodiment is intended to cover any variation, use or adaptation of the present application embodiment, which follows the general principles of the present application embodiment and includes common knowledge or customary technical means in the art that are not disclosed in the present application embodiment. The specification and embodiments are to be regarded as exemplary only, and the true scope and spirit of the present application embodiment are indicated by the following claims.

[0192] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

Claims

1. A controller for maintaining the roots of football field lawns, characterized in that: include: A PLC circuit, a wiring module, a dual-port gateway, a housing and a mounting plate; The PLC circuit is connected to the wiring module, the wiring module is connected to at least one external device, the PLC circuit is fixed inside the housing through the mounting plate, and the wiring module is fixed to the mounting plate; the external device includes: at least one field sensor, at least one field temperature sensor, at least one switch quantity, at least one frequency converter, at least one actuator, and at least one computer device; the switch quantity refers to a device used to realize the acquisition and output of discontinuous signals; The dual network port gateway is fixed on the housing; The dual-network-port gateway includes: a first network port and a second network port, wherein the first network port is used to connect to a first network, and the second network port is used to connect to a second network, and the first network and the second network have different network operating systems.

2. The controller according to claim 1, characterized in that: The PLC circuit includes: a central processing unit and at least one memory bar; The central processing unit is connected to at least one of the memory bars, and the central processing unit is also connected to the dual-network-port gateway.

3. The controller according to claim 1, characterized in that: The wiring module includes: a first wiring bank, a second wiring bank and a third wiring bank; The first wiring row and the second wiring row are fixed on one side of the housing; The third terminal block is fixed on the other side of the housing; The dual-network-port gateway is located at a side of the housing on which the third wiring block is fixed.

4. The controller according to claim 3, characterized in that: The first wiring row has at least one DI terminal; The second terminal block has at least one UI terminal and at least one RS485 terminal; The third terminal block has at least one DC terminal, at least one DO terminal, and at least one AO ​​terminal.

5. The controller according to claim 4, characterized in that: The UI terminal is used to connect with the field sensor, field temperature sensor, switch quantity, frequency converter, and actuator; The DI terminal is used to connect to a switch quantity; The DO terminal is used to connect to a switch quantity; The AO terminal is used to connect with field sensors, frequency converters and actuators; The RS485 terminal is used to connect to computer equipment; The DC terminal is used to connect to a power source.

6. The controller according to claim 1, characterized in that: The dual-port gateway includes: two Ethernet modules; or One Ethernet module and one serial port module; or Two serial port modules.

7. The controller according to claim 6, characterized in that: The first network port is connected to one of the two Ethernet modules, and the second network port is connected to the other of the two Ethernet modules; or The first network port is connected to the Ethernet module of the one Ethernet module and the one serial port module, and the second network port is connected to the serial port module of the one Ethernet module and the one serial port module; or The first network port is connected to one of the two serial port modules, and the second network port is connected to the other of the two serial port modules.

8. The controller according to claim 2, characterized in that: The mounting plate comprises: a plate body, at least one slot and at least one fixing hole; The side edge of the plate is connected to the inner side of the shell; The central processing unit is fixed on the board through at least one of the fixing holes; Each of the memory bars is fixed on the board through one of the slots; The wiring module is fixed on the plate body through at least one of the fixing holes.

9. The controller according to claim 8, characterized in that: The mounting plate further comprises at least one wiring terminal; The central processing unit is connected to one of the memory bars via at least one of the connection terminals; The central processing unit is connected to the dual-network-port gateway via at least one of the wiring terminals.

10. The controller according to claim 1, characterized in that: The housing has at least one guide rail and at least one ventilation hole; The two guide rails are arranged opposite to each other inside the housing and form a guide rail pair; Two side edges of the plate body of the mounting plate are respectively connected to two guide rails of one guide rail pair; The ventilation hole communicates with the inside of the shell and the outside.

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