Design of dynamic monitoring system of hoisting derrick based on wireless communication

Cage culture is one of the major forms of aquaculture now. For ensuring the product quality, it is necessary that the status of water environment is estimated. Aiming at the issues of high cost and the difficulty of arrangement cables, intelligent remote monitoring system based on wireless communication technology is developing, and wireless remote program update technology is brought in for adapting to different aquatic products. The system has advantage of wiring easily and networking conveniently, and has wide market prospects.

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Development of Miniaturized Water Quality Monitoring System Using Wireless Communication

Sensors ◽

10.3390/s19173758 ◽

2019 ◽

Vol 19 (17) ◽

pp. 3758

Author(s):

Hsing-Cheng Yu ◽

Ming-Yang Tsai ◽

Yuan-Chih Tsai ◽

Jhih-Jyun You ◽

Chun-Lin Cheng ◽

...

Keyword(s):

Water Quality ◽

Electrical Conductivity ◽

Wireless Communication ◽

Monitoring System ◽

Industrial Waste ◽

Continuous Monitoring ◽

Copper Ion ◽

Water Quality Monitoring ◽

Ion Concentration ◽

Quality Monitoring

Recently, environmental pollution resulting from industrial waste has been emerging in an endless stream. The industrial waste contains chemical materials, heavy metal ions, and other toxic materials. Once the industrial waste is discharged without standards, it might lead to water or environmental pollution. Hence, it has become more important to provide evidence-based water quality monitoring. The use of a multifunctional miniaturized water quality monitoring system (WQMS), that contains continuous monitoring, water quality monitoring, and wireless communication applications, simultaneously, is infrequent. Thus, electrodes integrated with polydimethylsiloxane flow channels were presented in this study to be a compound sensor, and the sensor can be adopted concurrently to measure temperature, pH, electrical conductivity, and copper ion concentration, whose sensitivities are determined as 0.0193 °C/mV, −0.0642 pH/mV, 1.1008 mS/V·cm (from 0 mS/cm to 2 mS/cm) and 1.1975 mS/V·cm (from 2 mS/cm to 5.07 mS/cm), and 0.0111 ppm/mV, respectively. A LoRa shield connected into the system could provide support as a node of long range wide area network (LoRaWAN) for wireless communication application. As mentioned above, the sensors, LoRa, and circuit have been integrated in this study to a continuous monitoring system, WQMS. The advantages of the multifunctional miniaturized WQMS are low cost, small size, easy maintenance, continuous sampling and long-term monitoring for many days. Every tested period is 180 min, and the measured rate is 5 times per 20 min. The feedback signals of the miniaturized WQMS and measured values of the instrument were obtained to compare the difference. In the measured results at three different place-to-place locations the errors of electrical conductivity are 0.051 mS/cm, 0.106 mS/cm, and 0.092 mS/cm, respectively. The errors of pH are 0.68, 0.87, and 0.56, respectively. The errors of temperature are 0.311 °C, 0.252 °C, and 0.304 °C, respectively. The errors of copper ion concentration are 0.051 ppm, 0.058 ppm, 0.050 ppm, respectively.

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