Distributed water quality remote monitoring system and monitoring method for culture fishery

A remote monitoring system and water quality monitoring technology, which is applied in the field of sensing, can solve the problems of being susceptible to transmission interference, short communication distance, and high energy consumption of nodes, and achieves the effects of strong scalability, simple installation, and low cost

Inactive Publication Date: 2021-07-13
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) In the existing water quality monitoring system, although the water quality monitoring system using GSM cellular network and GPRS has a long communication distance, the node energy consumption is high and additional operator fees need to be pa

Method used

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  • Distributed water quality remote monitoring system and monitoring method for culture fishery
  • Distributed water quality remote monitoring system and monitoring method for culture fishery
  • Distributed water quality remote monitoring system and monitoring method for culture fishery

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Embodiment 1

[0058] The present invention adopts the following technical solutions: an LPWAN-based distributed water quality remote monitoring system for fish farms. The system consists of three parts: a water quality monitoring node, a network controller and an Internet of Things monitoring platform. The water quality monitoring node is equipped with a water temperature sensor, a pH sensor, a turbidity sensor, a conductivity sensor, a dissolved oxygen concentration sensor and an ammonia nitrogen sensor, and the switch of the aerator is controlled according to the values ​​measured by the sensors. In order to keep the dissolved oxygen concentration stable around the set value, a PID control algorithm is introduced to further control the operation of the aerator. The measured dissolved oxygen concentration values ​​are sent to the PID control algorithm at a certain time interval to obtain the correction value, and the corresponding control port outputs PWM pulse signals of different widths t...

Embodiment 2

[0070] The LoRa communication module circuit design of the water quality monitoring node is as follows: image 3 As shown, the LoRa radio frequency module is responsible for receiving and forwarding water quality data. In the present invention, programming is performed in the MCU to realize the control of the LoRa module, and the information is encoded and sent out through the module. This design uses Semtech's SX1278 baseband chip, which uses LoRa Chirp Spread Spectrum CSS (Chirp Spreadrum Spread Spectrum) technology to send data. This technology can effectively reduce noise and interference and has a large coverage distance. Through the integrated +20dBm power amplifier, long-distance wireless communication can be guaranteed at a sensitivity as low as -148dBm. In addition, the chip only costs about $1-2, which greatly reduces the design cost.

[0071] The communication module SX1278 is a radio frequency module, which interacts with STM32 for data, and the data is packaged ...

Embodiment 3

[0090] A distributed water quality remote monitoring system for aquaculture fisheries based on LPWAN. The distributed water quality remote monitoring system for aquaculture fisheries based on LPWAN is composed of three parts: a water quality monitoring node, a network controller and an Internet of Things monitoring platform, wherein the water quality monitoring node The water temperature, pH value, turbidity, conductivity, dissolved oxygen concentration and ammonia nitrogen concentration measured by the sensor on the sensor, the collected data are calculated through a single PID algorithm to obtain the correction value, and the corresponding control ports output PWM pulses of different widths Signal, and then control the running state of the aerator. The OLED display on the node can display the data collected by the sensor on the current node and the working status of the aerator in real time. The data collected by each sensor and the state of the actuator are sent to the netw...

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Abstract

The invention belongs to the technical field of sensing, and discloses a culture fishery distributed water quality remote monitoring system and a monitoring method; the culture fishery distributed water quality remote monitoring system is composed of a water quality monitoring node, a network controller and an Internet of Things monitoring platform; wherein the water quality monitoring node is used for monitoring water quality through sensors, controlling on and off of aerators according to numerical values measured by the sensors, and sending collected data and an actuator state to the network controller through an LoRa communication module; the network controller is used for packaging all node data and then sending the packaged node data to the Internet of Things monitoring platform; and the Internet of Things monitoring platform is used for looking up the historical data of the sensors and remotely controlling the working state of each aerator of each node. The invention provides a communication scheme which can realize long distance, long battery life, simple installation, low cost, strong expansibility and secure encryption, and the system can be operated in global free frequency bands at present.

Description

technical field [0001] The invention belongs to the field of sensor technology, and in particular relates to a distributed water quality remote monitoring system and monitoring method for fish farms. Background technique [0002] At present, my country's aquaculture industry has developed vigorously in recent years, and its total output has accounted for about 70% of the world's total aquaculture output. In fish farming, the water quality environment of the fish farm has an important impact on the cultivation of aquatic organisms. Among them, the key parameters affecting the water quality of aquaculture mainly include water temperature, pH, turbidity, electrical conductivity, dissolved oxygen concentration, and ammonia nitrogen concentration. [0003] Existing water quality monitoring systems can be divided into remote water quality monitoring systems using GSM cellular network or GPRS and near-field water quality monitoring systems using ZigBee or WiFi based on distance. ...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0428G05B2219/24024
Inventor 郝笑陈伟周锋贺晨煜陈巍
Owner NANJING INST OF TECH
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