Design of electronic pulse fish barrier based on LoRa wireless communication
A wireless electronic pulse fish interceptor based on LoRa was developed to address the limited interception area and low intelligence level of traditional fish interceptors.The fish interceptor uses the Modbus RTU protocol to enable high-speed,long-distance wireless communication between a master and multiple slaves.Users can flexibly select the number of units,pulse frequency,pulse width,and other parameters according to different aquaculture areas to adapt to the ability of different fish to produce evasive responses in different water qualities.The host sends timing commands to control the slave to generate two inverted PWM square waves with deadband control,which,in turn,controls the IGBT for rapid commutation.This method is highly efficient,safe,and reliable,and it has low energy consumption and noise,which aligns with the current concept of green environmental protection.Additionally,the fish interceptor is equipped with conductivity,dissolved oxygen,pH,and temperature sensors on PLC.This allows for real-time monitoring of the water quality information of each slave point and the user's aquaculture area.This information plays a crucial role in supporting the user's aquaculture.An intelligent aquaculture platform based on the Internet of Things(IoT)has been developed using a C#environment.This platform can monitor the working status of the fish interceptor and the water quality information of each measurement point in real time.It can also carry out early warning of failures.The electronic pulse fish interceptor,with a pulse frequency of 3-12 Hz and pulse width of 0.6-1.2 ms,saves 60%electricity compared to SCR.It has implanted the new concept of"Internet of Things + Fisheries",which enables remote control by cell phone or computer.The practice has shown that the electronic pulse fish interceptor has the characteristics of automation,intelligence,and network.It can be applied to all kinds of aquaculture fish interceptor operations.
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