The Remote Metrology of Water Pollution Source Online Monitor Based on 3G Technology

In order to improve the efficiency of metrological ordinary work in water pollution source online monitor instrument and reduce the measurement personnel's labor intensity. 3G technology has been used to connect test instrument with the client's network through the study of the STM32 type microprocessor and analog-to-digital conversion to test instruments output current. DTU and 3G wireless network have been used to complete the testing data of the transmission, as well as formulate the corresponding server and client software,which perfect man-machine interface and facilitate man-machine interaction. Field experiments show that the system is stable and reliable, which can effectively meet the demand of the measurement and have a broad application prospect.

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Realization of 4~20mA Current A/D Conversion Module in the Water Pollution Source Online Monitoring Instrument under the Remote Metrology

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.889-890.845 ◽

2014 ◽

Vol 889-890 ◽

pp. 845-849

Author(s):

Yue Bing Sha ◽

Hong He ◽

Jian Wen Shao

Keyword(s):

Water Pollution ◽

Data Transmission ◽

Field Experiments ◽

Online Monitoring ◽

Pollution Source ◽

Monitoring Instrument ◽

Testing Data

In order to improve the efficiency of water pollution source online monitoring instrument under remote metrology and reduce the intensity of labor operation. 3G technology has been used to connect the instrument with the client's network through the STM32 microprocessor and A/D conversion. Current A/D conversion and 3G module have been used to complete the testing data transmission. In order to get the data, the software of server and client has been programed. Field experiments show that the system is stable and reliable, which can effectively meet the demand of the measurement.

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Energy Harvesting via Analog-to-Digital Conversion

2020 28th European Signal Processing Conference (EUSIPCO) ◽

10.23919/eusipco47968.2020.9287427 ◽

2021 ◽

Author(s):

Neha Jain ◽

Nir Shlezinger ◽

Yonina C. Eldar ◽

Anubha Gupta ◽

Vivek Ashok Bohara

Keyword(s):

Energy Harvesting ◽

Digital Conversion ◽

Analog To Digital ◽

Analog To Digital Conversion

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Distribution of nitrifying bacteria in a shallow stream

Water Science & Technology ◽

10.2166/wst.1997.0660 ◽

1997 ◽

Vol 36 (8-9) ◽

pp. 161-166 ◽

Cited By ~ 1

Author(s):

Ivana Jancarkova ◽

Tove A. Larsen ◽

Willi Gujer

Keyword(s):

Field Experiments ◽

Heterotrophic Bacteria ◽

Pollution Source ◽

Nitrifying Bacteria ◽

Channel Water ◽

River Bed ◽

Hydraulic Conditions ◽

Major Floods ◽

Shallow Stream ◽

Stream Bed

A project investigating the dynamics of self-purification processes in a shallow stream is carried out. Effects of the concentration gradient due to the distance to the pollution source, of hydraulic conditions in the river bed and of storm floods on the distribution of nitrifying bacteria were studied with the help of laboratory and field experiments. Nitrifiers density on the surface of the stream bed increased rapidly up to a distance of 300 m from the WWTP indicating possible competition of the nitrifiers with the heterotrophic bacteria close to the WWTP. Afterwards a slight decrease in the downstream direction was observed. In vertical profiles, higher bacterial densities were found at sites with rapid infiltration of channel water to the stream bed than at sites with no exchange between channel water and stream bed water or where stream bed water exfiltrated. A major flood event scoured the nitrifiers nearly totally from the surface of the river bed. Major floods belong so to the most dominant processes controlling self-purification in shallow streams. Minor floods, however, don't scour bacteria in the depth of the stream bed that could then be important for the self-purification processes.

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