106 results about "Surface water quality" patented technology

The invention discloses a water quality heavy metal multi-parameter online monitoring instrument which comprises an online sample digestion system, an online sample detection system and a measurement and control system. The water quality heavy metal multi-parameter online monitoring instrument disclosed by the invention can realize automatic online monitoring of content of heavy metals such as mercury, lead, cadmium, chromium and arsenic in water, can be widely applied to the fields of surface water quality pollution monitoring, seawater pollution monitoring, up-to-standard release monitoring of industrial wastewater treatment and municipal sewage treatment and the like and has the advantages of high functional expansibility, wide measurement range and low cost.

The invention discloses a method for constructing a prediction and evaluation model of time series type surface water quality big data, which firstly clears the numerical value obviously contrary to common sense, then finds out the time point nearest to the Markov distance according to all the data at the time point where the vacancy value exists, and uses the data at the time point to fill the vacancy value. Then the outliers in the water quality data are detected by using the improved KMeans + + clustering algorithm and Z-fraction detection algorithm, and the outliers are filled by support vector regression. Then stochastic forest algorithm is used to extract the important characteristics of water quality indicators, and the indicators with high importance are selected to evaluate the overall state of water quality. Then the LSTM model is used to predict the time series of the whole state of water quality. Finally, the MapReduce program of Hadoop is used to realize the parallel execution of the program, which improves the execution efficiency of each algorithm, completes the final prediction and evaluation model construction, and improves the efficiency, integrity and accuracy ofwater quality big data analysis.

The invention discloses a water quality monitoring data calibration method based on edge calculation, which relates to the technical field of Internet of Things. The water quality monitoring data calibration method comprises the following steps of: acquiring water quality historical data of a micro water quality monitoring station and an environmental surface water quality automatic monitoring station; performing water quality data calibration based on an XGBoost algorithm, and establishing a water quality data calibration model; remotely updating the obtained water quality data calibration model to an edge gateway based on a TCP / IP protocol; and using the water quality data calibration model at the edge gateway and periodically adjusting and updating the water quality data calibration model to the edge gateway according to different external environments. According to the water quality monitoring data calibration method, real-time data calibration is carried out on terminal hardware,the network traffic is saved, and the computing pressure of a cloud server is reduced; the precision and accuracy rate of the miniature water quality monitoring station are improved, the water qualitydata calibration model is optimized and updated regularly to adapt to the external environment, and the miniature water quality monitoring station can be practically applied to development of embedded equipment and an environment-friendly big data platform.

A non-contact water quality detecting device for surface water comprises multiple spectral sampling heads, collimators, an optical path gating device, a bifurcated optical fiber and a miniature spectrograph. Each spectral sampling head is connected with the corresponding optical fiber collimator through an optical fiber, the optical fiber collimators are in one-to-one correspondence with collectivelenses of the bifurcated optical fiber on corresponding optical paths, the optical path gating device is located between the optical fiber collimators and the colletivelenses, the optical path gating device is provided with a gating channel which rotates around a rotating shaft, and in the rotating process of the gating channel, the optical path between one optical fiber collimator and the corresponding collectivelens can be made to be in conducting state. Compared with the prior art, the non-contact water quality detecting device for the surface water has the advantages that a continuous spectral measurement method is adopted, on-site non-contact water quality detecting for the surface water is achieved, water quality parameters such as colored dissolved organic matter, total suspended matter and chlorophyll a can be detected simultaneously, and the non-contact water quality detecting device for surface water has the advantages of being low in cost, convenient to use, high in measurement speed and free of pollution.

The invention discloses a surface water quality monitoring system, which comprises a monitoring control center and a plurality of monitoring terminal groups. The plurality of monitoring terminal groups are respectively connected with their corresponding central controllers. The central controllers are connected with the monitoring control center through a wireless network. The monitoring control center monitors water quality according to analysis data. Each central controller comprises a micro control unit which is respectively connected with an information acquisition unit and a signal transmitting unit. By accurately monitoring water quality of each monitoring point in real time, the monitoring system achieves unified management control, discovers pollution areas in time, provides first-hand information for pollution control, and greatly improves the timeliness of pollution treatment.