Liquid oxygen oxygen supply control method and controller for high-density deep water culture

Abstract

The application discloses a liquid oxygen oxygen supply control method and a controller for high-density deep water culture. The method comprises the following steps: S1, starting self-checking; S2, starting and stopping liquid oxygen according to the dissolved oxygen threshold in the automatic mode; S3, forcibly supplying oxygen continuously in the ecological restoration mode; S4, cutting off in the leakage monitoring; S5, three-level alarm disposal (5, early warning; 4, disposal; 3, starting liquid oxygen and starting the generator); S6, self-checking of the air release pipe blockage; S7, automatically switching to the battery and starting the generator in the power failure; and S8, monitoring the liquid oxygen storage and reminding oxygen enrichment. The controller is reserved with an encrypted communication module interface and a main and auxiliary machine switching switch, can be plugged and used, freely networked and flexibly expanded into a central control system. The application realizes intelligent control and fault emergency of liquid oxygen oxygen supply, provides a low-cost and expandable intelligent upgrading path for users and is suitable for high-density deep water culture.

Description

Technical Field

[0001] This invention relates to the field of automatic control technology for aquaculture, specifically to a liquid oxygen supply control method for high-density deep-water aquaculture and a controller for implementing the method. Background Technology

[0002] In high-density deep-water aquaculture, the water depth of the aquaculture pond is usually more than 2.5 meters. Traditional aerators have limited effective oxygenation depth and cannot effectively transport dissolved oxygen to the bottom of the pond, resulting in an oxygen debt zone at the bottom of the pond. This leads to the accumulation of ammonia nitrogen and nitrite, which restricts the aquaculture density and yield. In existing technologies, liquid oxygen supply systems typically employ simple threshold control—the system turns on when dissolved oxygen levels fall below a certain value and turns off when they rise above a certain value. This approach has the following drawbacks: first, it lacks a specific control strategy for addressing oxygen debt at the bottom of deep ponds; second, it lacks monitoring of liquid oxygen levels, posing a risk of system failure once the liquid oxygen is depleted; and third, it cannot automatically restore power during power outages, resulting in insufficient system reliability. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a liquid oxygen supply control method and controller with functions of automatic oxygenation, ecological restoration, fault diagnosis, power outage emergency response and liquid oxygen inventory monitoring. To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A liquid oxygen supply control method for high-density deep-water aquaculture, applied to an oxygen supply system including a liquid oxygen supply device, a solenoid valve, a flow sensor, a dissolved oxygen probe, a backup power supply, and a generator, includes the following steps: S1. Start-up self-test: After receiving the start command, the system sends test signals to the solenoid valve, flow sensor, dissolved oxygen probe and backup power supply in sequence. After confirming that the status of each component is normal, it enters S2. S2, Automatic Mode: Receives real-time monitoring data from the dissolved oxygen probe. When the dissolved oxygen level is ≤ the preset lower limit, the solenoid valve opens to activate the liquid oxygen supply device for supplemental oxygenation. When the dissolved oxygen level is ≥ the preset upper limit, the solenoid valve closes to stop oxygen supply. The preset lower limit is, for example, 4 mg / L, and the preset upper limit is, for example, 7 mg / L. S3, Ecological Restoration Mode: Upon receiving a switching command, the automatic logic of S2 is disabled, the solenoid valve is forcibly opened, and continuous oxygen supply is maintained until an exit command is received. This mode is used in scenarios where continuous elimination of oxygen debt at the bottom of the pond is required in the mid-to-late stages of aquaculture. Switching commands can be sent remotely via local buttons or a mobile app. S4. Leakage Monitoring and Emergency Shutdown: Receives real-time monitoring data from the flow sensor. When the flow exceeds a preset safety threshold, the emergency shut-off device is activated and an alarm is issued. S5. Graded Alarm and Automatic Response: Three-level response based on dissolved oxygen value—when dissolved oxygen value ≤ 5 mg / L, issue a level 1 warning; when dissolved oxygen value ≤ 4 mg / L, execute S2 for level 2 response; when dissolved oxygen value ≤ 3 mg / L, automatically start the liquid oxygen supply device and generator, and issue a level 3 emergency alarm. S6. Self-check for blockage in the aeration pipe: When the solenoid valve is opened, if the flow value detected by the flow sensor is lower than the preset normal range, and the dissolved oxygen value does not reach the preset increase rate within the preset time, it is determined that the microporous aeration pipe may be blocked, and a cleaning alarm is issued. S7. Power Outage Emergency Response: When a mains power outage is detected, the system automatically switches to backup power and sends a start signal to the generator to restore power supply. When mains power is restored, the controller sends a stop signal to the generator and switches back to mains power supply mode. S8. Liquid Oxygen Level Monitoring and Refilling Reminder: Real-time monitoring of the liquid oxygen tank level. When the liquid oxygen level falls below a preset warning value, a refilling reminder is sent to the mobile app via a wireless communication module. The liquid oxygen tank level can be monitored using a weighing sensor or a pressure sensor. The present invention also provides a controller for implementing the above method, comprising: multiple signal input terminals, multiple drive output terminals, a power supply switching module, a wireless communication module, and a control chip. The signal input terminals are respectively used to receive signals from a dissolved oxygen probe, a flow sensor, a liquid oxygen tank level sensor, and a mains power monitoring signal. The drive output terminals are respectively used to drive a solenoid valve, an emergency shut-off device, and a generator starting module. The control chip is configured to execute the control logic described in S1 to S8. In addition, the controller's circuit board has a pre-installed standardized encrypted communication module interface and a master / slave switch. When the user needs to use this controller as the master device for the entire breeding area, simply insert the communication module and switch it to the "master" position to send commands and manage other network-connected devices. Conversely, switching the switch to the "slave" position will automatically switch the controller to the controlled device, receiving commands from the master device to operate. This plug-and-play, freely networkable design provides farmers with a low-cost, scalable, and intelligent upgrade path. Compared with the prior art, the beneficial effects of the present invention are as follows: 1. It combines automatic mode and ecological restoration mode: it automatically starts and stops according to the dissolved oxygen threshold in daily life, and can be switched to forced continuous oxygen supply with one click in the middle and late stages, which is specially designed to eliminate oxygen debt at the bottom of the pond. 2. Tiered alarm and automatic response: Three-level response: early warning, handling, and emergency. When the concentration reaches 3mg / L, all equipment starts up and the generator is activated to prevent sudden shutdown. 3. Aeration pipe self-check: It judges pipe blockage by both the rate of decrease in flow and the rate of increase in dissolved oxygen, and reminds you to clean and maintain it in time. 4. Automatic generator activation during power outages: After a power outage, the generator automatically switches off the battery and starts the motor. Once power is restored, it automatically switches back to AC power, requiring no manual intervention throughout the process. 5. Liquid oxygen level alert: Real-time monitoring of liquid oxygen levels and timely notification of oxygen replenishment to prevent supply interruptions. 6. Reserved networking interface: The controller has reserved an interface for an encrypted communication module and a master / slave switch, which can be flexibly expanded into a central control system to protect the user's investment. Attached Figure Description

[0004] Figure 1 This is a flowchart of the control method of the present invention. Figure 2 This is a schematic diagram of the hardware interface architecture of the controller of the present invention. Detailed Implementation

[0005] The preferred embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Example 1: Control Method Flow like Figure 1 As shown in the figure, this embodiment provides a liquid oxygen supply control method for high-density deep-water aquaculture, and the specific process is as follows: S1. Receive the startup command, perform system self-test, and confirm that all components are in normal condition. S2, Automatic Mode: The liquid oxygen solenoid valve is opened when dissolved oxygen is ≤4mg / L, and closed when dissolved oxygen is ≥7mg / L. S3. Upon receiving the ecological restoration mode command, liquid oxygen will be forcibly activated and continuously supplied with oxygen. S4. When the flow rate increases abnormally, an emergency shutdown will be initiated and an alarm will be triggered. S5, graded alarm: 5mg / L warning, 4mg / L executes S2, 3mg / L starts liquid oxygen + generator and alarms. S6. After liquid oxygen is turned on, the flow rate is lower than the normal range and the dissolved oxygen increases slowly, prompting an alarm to clean the aeration pipe. S7: When the mains power is interrupted, switch to the backup power supply and start the generator; when the mains power is restored, stop the generator and switch back to the mains power. S8. When the liquid oxygen level is lower than the warning value, the App will push an oxygen replenishment reminder. Example 2: Controller Hardware Interface like Figure 2 As shown, this embodiment provides a controller for implementing the above method, including a control chip, a signal input interface, a drive output interface, a power supply switching module, and a wireless communication module. The signal input interfaces include dissolved oxygen probe signal input terminal, flow sensor signal input terminal, liquid oxygen tank inventory sensor signal input terminal, and mains power monitoring signal input terminal. The drive output interfaces include the solenoid valve drive output terminal, the emergency shut-off device drive output terminal, and the generator starter module drive output terminal. The power switching module is used to automatically switch to a backup power source when the mains power is interrupted. The wireless communication module is used for data interaction with mobile terminal apps. Example 3: Master / Slave Switching and Networking of the Controller In this embodiment, the controller motherboard has a standardized encrypted communication module interface, which can accommodate an independent encrypted communication module. Additionally, the motherboard also has a master / slave switching switch. When users need to use this controller as the main control device for the entire aquaculture area, they only need to insert the communication module and switch the master / slave switch to the "master" position. At this time, the main control chip of this controller will assume the central control function, sending commands through the communication module to manage other devices connected to the network. Conversely, if there is another controller in the breeding area as the host, the user only needs to switch this controller to the "sub-controller" position and insert the communication module. This controller will then automatically switch to the controlled device and receive instructions from the host to work. For example, a farmer who purchases both a liquid oxygen controller and a pesticide spraying controller simply needs to insert a communication module into the liquid oxygen controller and set it as the master unit, and insert a communication module into the pesticide spraying controller and set it as the slave unit. The liquid oxygen controller can then control the pesticide spraying system to perform emergency water quality adjustments based on dissolved oxygen data. This plug-and-play, freely networkable design greatly reduces the threshold and cost of intelligent transformation. It should be noted that the above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent method modifications or controller hardware architecture modifications made based on the concept of the present invention are included within the scope of protection of the present invention.

Claims

1. A liquid oxygen supply control method for high-density deep-water aquaculture, applied to an oxygen supply system including a liquid oxygen supply device, a solenoid valve, a flow sensor, a dissolved oxygen probe, a backup power supply, and a generator, characterized in that, Includes the following steps: S1. Start self-test; S2, Automatic Mode: Receives real-time monitoring data from the dissolved oxygen probe. When the dissolved oxygen value is ≤ the preset lower limit, the solenoid valve is opened to start the liquid oxygen supply device for supplemental oxygenation; when the dissolved oxygen value is ≥ the preset upper limit, the solenoid valve is closed to stop oxygen supply. S3, Ecological Restoration Mode: When a switching command is received, the automatic logic of S2 is disabled, the solenoid valve is forcibly opened and oxygen supply is maintained until an exit command is received. S4. Leakage monitoring and emergency shutdown: Receives real-time monitoring data from the flow sensor. When the flow exceeds a preset safety threshold, the emergency shutdown device is activated and an alarm is issued. S5. Graded Alarm and Automatic Response: Three-level response based on dissolved oxygen value—when dissolved oxygen value ≤ 5 mg / L, issue a level 1 warning; when dissolved oxygen value ≤ 4 mg / L, execute S2 for level 2 response; when dissolved oxygen value ≤ 3 mg / L, automatically start the liquid oxygen supply device and generator, and issue a level 3 emergency alarm at the same time. S6. Self-check for blockage in the aeration pipe: When the solenoid valve is opened, if the flow value detected by the flow sensor is lower than the preset normal range, and the dissolved oxygen value does not reach the preset increase rate within the preset time, it is determined that the microporous aeration pipe may be blocked, and a cleaning alarm is issued. S7. Power outage emergency linkage: When a mains power outage is detected, it automatically switches to backup power supply and sends a start signal to the generator to restore system power supply; S8. Liquid oxygen level monitoring and oxygen replenishment reminder: Real-time monitoring of the liquid oxygen tank level. When the liquid oxygen level is lower than the preset warning value, an oxygen replenishment reminder is sent to the mobile terminal App via the wireless communication module.

2. The method according to claim 1, characterized in that, In S2, the preset lower limit is 4 mg / L and the preset upper limit is 7 mg / L.

3. The method according to claim 1, characterized in that, The switching command for S3 comes from a local button or is remotely issued by a mobile terminal App.

4. The method according to claim 1, characterized in that, In step S7, when the mains power is detected to be restored, the controller sends a shutdown signal to the generator and switches back to the mains power supply mode.

5. The method according to claim 1, characterized in that, In S8, the liquid oxygen tank level is monitored by a weighing sensor or a pressure sensor.

6. The method according to claim 1, characterized in that, Also includes: The system status, dissolved oxygen level, and alarm information are sent to the mobile terminal App via the wireless communication module, and control commands issued by the App are received.

7. A controller for implementing the method according to any one of claims 1 to 6, characterized in that, include: Multiple signal input terminals are used to receive signals from dissolved oxygen probe, flow sensor, liquid oxygen tank level sensor and mains power monitoring, respectively. Multiple drive output terminals are used to drive solenoid valves, emergency shut-off devices, and generator starting modules, respectively; The power supply switching module is used to automatically switch to the backup power supply when the mains power is interrupted; The wireless communication module is used for data interaction with the mobile terminal App; The control chip is configured to execute the control logic of S1 to S8.

8. The controller according to claim 7, characterized in that, The circuit board containing the control chip also integrates: A standardized encrypted communication module interface for inserting external communication modules; A master / slave switching switch is electrically connected to the control chip; When the master / slave switch is set to master mode, the control chip sends control commands through the inserted communication module to remotely control the devices driven by the communication modules connected to other controllers. When the master / slave switch is set to slave mode, the control chip receives control commands from the master through the inserted communication module and drives the connected devices according to the commands.

9. The controller according to claim 8, characterized in that, The encrypted communication module interface is a physical slot, and the communication module is an independent physical hardware module that can be plugged into the interface.

Images