A water and fertilizer integrated machine, system and method for remotely and locally switching freely

Abstract

The application provides a water and fertilizer integrated machine, system and method for remote and local mode free switching, and belongs to the field of fertilization and watering systems. The water and fertilizer integrated machine realizes a unique "local start and remote stop" interaction logic through its control circuit. The circuit contains a parallel local control branch and a remote control branch, and through an interlocking logic circuit, the electrical interlocking of the two control instructions is ensured to avoid conflicts. In addition, the system is integrated with a low-voltage protection unit and a liquid level linkage unit, which automatically cuts off the control circuit when the power supply voltage is abnormal and the liquid level is too high, respectively, providing double safety protection. The application solves the problems of single control mode and lack of safety interlocking of existing equipment, and realizes the flexibility, safety and reliability of human-computer interaction in water and fertilizer integrated management.

Description

Technical Field

[0001] This invention relates to the field of fertilization and irrigation technology, and in particular to an integrated water and fertilizer machine, system and method for freely switching between remote and local modes. Background Technology

[0002] With the development of precision agriculture, the automation level of integrated water and fertilizer systems is becoming increasingly higher. Currently, the control methods of the system are mainly divided into two categories: one is purely local manual control, which, although it responds directly, cannot meet the modern needs of remote scheduling and management; the other is purely remote automatic control, which, although convenient for centralized monitoring, lacks effective operating means and has insufficient system flexibility when there are network anomalies or when emergency on-site intervention is required.

[0003] More critically, existing technologies lack an effective management mechanism for the coordinated operation of local and remote control modes. If on-site personnel and remote administrators issue control commands simultaneously, especially conflicting commands (such as one starting and the other stopping), it can easily cause system malfunctions, actuator errors, and even equipment damage or water and fertilizer application accidents.

[0004] In addition, existing equipment typically lacks reliable automatic protection mechanisms integrated into the control logic when facing common abnormal operating conditions such as grid voltage fluctuations, insufficient pipeline pressure, or liquid overflow.

[0005] Therefore, there is an urgent need in this field for an intelligent water and fertilizer integration solution that allows multiple control modes to coexist and work together safely, and has inherent safety protection functions. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned defects of the prior art and provide an integrated water and fertilizer machine, system and method. Its core purpose is to realize safe, flexible and reliable switching and coordination between local control and remote control, while integrating multiple protection mechanisms to fundamentally improve the system's ease of operation, operational stability and security.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: To achieve the above objectives, the present invention adopts the following technical solution: Firstly, a water and fertilizer integrated machine is provided. Its core innovation lies in a unique control circuit architecture. This architecture includes local control branches, remote control branches, interlocking logic circuits, and optional low-pressure protection units and liquid level detection units.

[0008] The local control branch serves as a field human-machine interface and is configured to respond to a local trigger signal (such as pressing a button) to activate the coil circuit of the actuator (such as contactor KM1, KM2 or relay KA4), thereby starting the corresponding equipment.

[0009] The remote control branch serves as a remote management interface and is configured to control the remote control contacts (such as the normally closed contacts of remote relays OUT1, OUT2, and OUT3) to open in response to a remote stop signal. These contacts are connected in series in the coil circuit of the actuator, thereby remotely stopping the equipment.

[0010] The interlocking logic circuit is connected between the local control branch and the remote control branch to achieve electrical interlocking. A preferred embodiment includes a first logic relay (KA3) and a second logic relay (KA2). The first logic relay (KA3) is activated by a local trigger signal and maintains its state through its self-locking contact; its output contact controls the actuator of the water injection unit. The remote control branch controls the second logic relay (KA2) to simultaneously cut off the coil circuit of both the first logic relay (KA3) and the actuator using its normally closed contact, thereby blocking the conduction state established by the local start-up when the remote stop signal is valid.

[0011] The low-pressure protection unit includes a pressure monitoring relay (KA5), whose contacts are connected in series in the main control power supply circuit for system-level protection. The output node of the liquid level detection unit is connected in series in the control circuit of the water injection unit for overflow protection.

[0012] Secondly, an integrated water and fertilizer control system is provided, including the integrated water and fertilizer machine and remote control platform as described above.

[0013] Thirdly, a method for integrated water and fertilizer control is provided, including a local start-up step, a remote stop step, and an interlock execution step.

[0014] The beneficial effects of the technical solutions provided by the embodiments of the present invention include at least the following: (1) For the first time, the collaborative control logic of "local priority start and remote priority stop" was realized in the water and fertilizer integrated machine, which not only respects the immediacy of on-site operation, but also ensures the authority of remote management, and perfectly solves the problem of instruction conflict when multiple control modes coexist.

[0015] (2) Through hardware interlocking logic based on relay contacts, it provides a higher level of reliability and security than software interlocking, fundamentally eliminating the risk of misoperation caused by program crashes or network delays, and is particularly suitable for use in agricultural fields with complex electromagnetic environments and high reliability requirements.

[0016] (3) The safety mechanisms such as low pressure protection and liquid level protection are deeply integrated into the main control logic, forming a systematic safety protection system, which significantly improves the equipment's survivability and safety under non-ideal working conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main circuit and control power supply of the integrated water and fertilizer machine according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the control circuit logic of the integrated water and fertilizer machine according to an embodiment of the present invention.

[0019] In the accompanying drawings, the same component symbols represent the same or similar functional parts. For example: SA1 and SA2 are self-locking buttons; SA3 is a self-reset button; KM1 and KM2 are contactors; KA1-KA5 are relays; and OUT1-OUT3 are remote control relays. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings and based on the technical solutions claimed in the claims.

[0021] See Figure 1 and Figure 2 This embodiment describes in detail one specific implementation of the integrated water and fertilizer machine. The actuators shown in the figure include a contactor KM1 that controls the fertilizer pump, a contactor KM2 that controls the mixing pump, and a relay KA4 that controls the water injection valve.

[0022] Example 1: The fertilizer pump control process is as follows: The local control branch of the mixing / fertilizing unit includes a self-locking button SA1.

[0023] The remote control contact of the remote control branch is the normally closed contact of the remote relay OUT1.

[0024] Local start procedure: Press the self-locking button SA1. The current path is: power supply → SA1 → normally closed contact of OUT1 → coil of contactor KM1. KM1 is energized and its main contacts close, starting the fertilizer pump.

[0025] Remote stop procedure: The remote control platform energizes the remote relay OUT1, causing its normally closed contact to open, cutting off the KM1 coil circuit and stopping the fertilizer pump. This structure achieves basic interlocking.

[0026] Example 2: The water injection valve control process is as follows: The triggering element of the local control branch is the self-reset button SA3 (which generates a local trigger signal).

[0027] The interlocking logic circuit includes a first logic relay KA3 and a second logic relay KA2.

[0028] Local start procedure: Press SA3, relay KA1 (which can be regarded as an intermediate relay for local trigger signal) is energized, and its contacts close to energize the first logic relay KA3. KA3 is kept energized through its self-locking contacts and controls the execution relay KA4 to be energized through its output contacts, thus opening the water injection valve.

[0029] Remote stop procedure and interlock execution procedure: The remote signal energizes OUT3, which in turn energizes the second logic relay KA2. The normally closed contact of KA2 is connected in series in the common coil circuit of KA3 and KA4. After KA2 is energized, its normally closed contact opens, simultaneously forcibly cutting off the coil circuit of KA3 and KA4, and closing the water injection valve. At this time, since the normally closed contact of KA2 has opened, it cannot be restarted locally, thus achieving hard interlocking.

[0030] Example 3: The protection function is implemented as follows: Low-voltage protection unit: The contacts of the pressure monitoring relay KA5 are connected in series in the main control power supply circuit. When the voltage or pressure is abnormal, its contacts open, realizing system-level power failure protection.

[0031] Liquid level detection unit: Its output node (such as a normally closed contact) can be connected in series in the coil circuit of the actuator KA4. When the liquid level is too high, this node opens, forcibly cutting off the circuit and achieving protection.

[0032] It should be noted that this specific embodiment is a detailed description of the technical solution described in the claims, and not a limitation thereof. Those skilled in the art can make various modifications and variations within the scope of protection defined by the claims of this invention.

Claims

1. A water and fertilizer integrated machine for freely switching between remote and local modes, characterized in that, include: The system comprises a water injection unit, a mixing unit, a fertilization unit, and a control circuit, wherein the control circuit includes: The local control branch is configured to activate the actuators of the water injection unit, stirring unit, or fertilization unit in response to a local trigger signal; A remote control branch is configured to disconnect the control circuit of the actuator in response to a remote stop signal; an interlock logic circuit includes a third logic relay KA1, a first logic relay KA3, a second logic relay KA2, and a fourth logic relay KA4; the local control branch of the water injection unit is equipped with a self-reset button SA3, the normally open contact of the self-reset button SA3 is connected in parallel with the normally open contact of the third remote relay OUT3 and then connected in series with the coil circuit of the third logic relay KA1; when the normally open contact of the third logic relay KA1 closes, it simultaneously conducts the coils of the first logic relay KA3 and the fourth logic relay KA4, and the water injection valve is turned on; the normally open contact of the first logic relay KA3 and the normally open contact of the second logic relay OUT3 are connected in parallel with the coil circuit of the third logic relay KA1; when the normally open contact of the first logic relay KA3 is connected in parallel with the coil circuit of the fourth logic relay KA4, the control circuit of the third logic relay KA1 is turned on. The normally closed contact of logic relay KA2 is connected in series to form a self-holding circuit for the first logic relay KA3 and the fourth logic relay KA4. The normally closed contact of the first logic relay KA3 provides interlocking protection. The normally closed contact of the third logic relay KA1 is connected in series with the normally open contact of the first logic relay KA3 to drive the coil circuit of the second logic relay KA2. When the second logic relay KA2 is energized, its normally closed contact opens, cutting off the self-holding circuit and causing the first logic relay KA3 and the fourth logic relay KA4 to be de-energized simultaneously, thus closing the water injection valve. The local control branch of the stirring unit or fertilizing unit includes self-locking buttons SA1 and SA2. The remote control contact of the remote control branch is the normally closed contact of the remote relays OUT1 and OUT2, which is connected in series in the coil circuit of the contactors KM1 and KM2 controlled by the self-locking buttons. The low-voltage protection unit includes a pressure monitoring relay KA5, the contacts of which are connected in series in the main control power supply circuit of the control circuit. A liquid level detection unit, the output node of which is connected in series in the control loop of the water injection unit, is configured to automatically disconnect the loop when the liquid level reaches a set height.

2. A water and fertilizer integrated control system, characterized in that, include: The integrated water and fertilizer machine as described in claim 1; The remote control platform is communicatively connected to the integrated water and fertilizer machine, and is used to send the remote stop signal and receive the status feedback signal of the integrated water and fertilizer machine.

3. A method for integrated water and fertilizer control, applied to the integrated water and fertilizer machine as described in claim 1, characterized in that, The method includes: Local startup steps: In response to local user operations, the target execution unit is started through the local control branch; Remote stop procedure: In response to a remote control command, the control loop of the target execution unit is forcibly disconnected through the remote control branch; Interlocking execution steps: Through the hardware interlocking of the interlocking logic circuit, it is ensured that the local startup step cannot maintain the operation of the target execution unit during the period when the remote stop step is in effect.

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