Aquaculture wireless sensor network node device and operation method

A wireless sensor and network node technology, applied in network topology, wireless communication, measuring devices, etc., can solve the problems of high price, difficult promotion and use in aquaculture waters, and inconvenient maintenance, and achieve low cost, good real-time performance, and long life. Effect

Active Publication Date: 2013-09-25
NANJING INAGRI SENSOR NETWORKS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research focus on dissolved oxygen detection in aquaculture is mainly focused on the establishment of distributed monitoring systems, mostly using wired, manual access or intervention methods, which are not only expensive, but also extremely inconvenient to maintain. It is difficult to popularize and use it in a large area in harsh aquaculture waters

Method used

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  • Aquaculture wireless sensor network node device and operation method
  • Aquaculture wireless sensor network node device and operation method
  • Aquaculture wireless sensor network node device and operation method

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Experimental program
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Embodiment 1

[0090] The microprocessor chip U1 in the above-mentioned microprocessor unit 1 selects the 8-bit CMOS processor ATmega128L of low power consumption and high performance produced by ATMEL Company, such as figure 2 shown. ATmega128L is based on AVR RISC structure, and the data throughput rate is as high as 1MIPS / MHz, which can alleviate the contradiction between power consumption and processing speed of the system. The data lines of the JTAG interface in the microprocessor unit 1 are connected to the pins "54-57" of the ATmega128L microprocessor chip after passing through pull-up resistors "R1-R4". LED1-LED3 are the working state indicators of the ATmega128L microprocessor chip and the wireless communication unit 2 data sending and receiving indicators. In the system debugging stage, the running status of the program is judged according to the status of the indicators. The status indicators LED1-LED3 are the same as the " 49, 50, 51" pins are connected. R 9 with C 11Form a ...

Embodiment 2

[0092] In the above-mentioned dissolved oxygen signal conditioning unit 3, the polarization voltage generator 3-1 is composed of an NPN transistor S8050 and an external resistor R 18 composition to obtain a stable 0.7V polarizing voltage output, such as image 3 shown. U5 is a precision dual operational amplifier TLC277ID, which has a wide range of low offset voltage input and drift, high input impedance, and low noise. Dual power supply mode is adopted, and the working voltage is reversed by the CMOS voltage inverter to supply power to TLC277ID. The voltage output by the signal preamplifier 3-2 is proportional to the current input by the dissolved oxygen signal conditioning unit 3, and the amplification factor By adjusting the external resistor R 25 The resistance value is obtained. The voltage signal output by the signal preamplifier 3-2 passes through the precision resistor R 28 and R 29 After the voltage is divided, the standard voltage signal is generated and input t...

Embodiment 3

[0097] In the above cleaning pump control unit 5, the "48" pin in the microprocessor chip U1 passes through the current limiting resistor R 16 It is connected to the "3" pin of U2. U2 uses an optocoupler isolation chip 6N137 to isolate the digital circuit and the analog circuit in the electrical space, avoiding various electrical interferences, such as Figure 5 shown. The "48" pin of the microprocessor chip U1 is connected to the gate G pin of the field effect transistor Q5 on the power management board. Q5 uses a power field effect transistor IRF7832. The cleaning pump automatically cleans the electrodes of the dissolved oxygen sensor. The opening and running time of the cleaning pump are realized by the microprocessor chip through software programming, which reduces human intervention.

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Abstract

The invention discloses an aquaculture wireless sensor network node device and an operation method, and belongs to the technical field of water quality monitoring. The aquaculture wireless sensor network node device and the operation method are suitable for many application occasions such as water quality parameter online detection in aquaculture of Chinese mitten crabs, fish, shrimps, shellfish and the like and used for collecting parameter data of dissolved oxygen content (mg/L) and water temperature ( DEG C) in an aquaculture pond in real time online and sending the data to a wireless sensor network gateway or a wireless sensor network base station and a local terminal in a 433MHz frequency band wireless sensor network communication manner after further changing, possessing and storing the parameter data.

Description

technical field [0001] The invention relates to an aquaculture wireless sensor network node device and an operation method, belonging to the technical field of water quality monitoring. Background technique [0002] Dissolved Oxygen (DO) refers to the oxygen in the air dissolved in the molecular state of water, expressed in milligrams of oxygen per liter of water (mg / L), it is one of the most indispensable living conditions for aquatic organisms . Oxygen content in normal air is high and stable, accounting for about 21% of the whole air. Terrestrial organisms are rarely threatened by hypoxia, while dissolved oxygen content in water is low and changes frequently. Atmospheric pressure is related to water temperature and is closely related to water quality. Generally speaking, the greater the atmospheric pressure, the higher the dissolved oxygen content in water; the lower the water temperature, the higher the dissolved oxygen content. At the same time, when the aquaculture ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04W84/18H04W88/02G08C17/02G01N27/26G01K7/18
Inventor 陈俊杰卜世平李刚蒋燕飞
Owner NANJING INAGRI SENSOR NETWORKS TECH
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