University students develop water quality monitors to determine the concentration of pollutants
Recently, more than 40 college student volunteers wearing red hats at the China Institute of Metrology launched a "five waters governance" initiative at the school's Qiming Square.
Five-water co-governance means treating sewage, preventing flooding, draining water, maintaining water supply, and saving water. In order to let everyone understand the hazards of the "Five Waters", the volunteers of the School of Optoelectronics started a water quality monitoring experiment on the spot.
A computer, two metal boxes, three wires of water quality monitoring equipment are placed on the table, and then put the monitoring end into a cup of washing powder. Xiong Zhili, a senior student from the microelectronics major, began to operate. Within 3 minutes, the computer immediately sent a signal indicating that the pollutant was detected.
"Wow, it's amazing, it was monitored so quickly." The students watching on the side widened their eyes.
The two metal boxes are about the size of 15 cm long, 10 cm wide and 17 cm high. One is a broadband light source box, which can cover the ultraviolet to visible light region, thereby providing optical signals. The other is the spectrometer box, which can convert the optical signal into a digital signal. Finally, it is transmitted to the control terminal computer through the USB data transmission module in real time, and the computer performs analysis and calculation based on the transmitted digital signal.
The broad-spectrum optical fiber water quality monitoring system is based on optical fiber sensing technology and wide-spectrum analysis technology. The optical fiber water quality sensor for measuring multi-parameter indicators of water quality and a special USB optical fiber spectrometer are studied. Monitoring System.
"The system mainly uses the extracted spectral data to monitor the chromaticity, chemical oxygen demand and nitrate nitrogen content in water. Nitrate nitrogen and chemical oxygen demand are clearly proposed test indicators in the national water quality testing standards. The comprehensive indicators are closely related to aquatic animals and plants. "Xiong Zhili said that the system can be applied to hydrological observation stations, water quality monitoring stations, large factories, etc. to monitor the corresponding water indicators.
"Such a" magic and clever "sensor monitor can be automatically monitored 24 hours a day, without personnel guarding, to determine the concentration of pollutants, so as to find the source of pollution." Xiong Zhili said that this sensor monitor integrates more An intelligent control technology, using new energy, wireless transmission and other technologies, relying on school-funded scientific research funds, took nearly two years to produce. The monitor has applied for four national patents and will be put into development next.
Xiong Zhili said that he hopes that this monitor can bring convenience to water quality monitoring and realize industrialization, so that the intellectual achievements of college students can play a greater role.
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