Automatic measurement and data recording device for sediment content in river water

Abstract

The invention discloses an automatic measurement and data recording device for sediment content in river water, which mainly includes an isometric lever, a standard sample container, a sample container, a weighing instrument, a main controller and a wireless data receiver. According to the measurement requirements, the device controls the water pump to draw the river water sample containing sediment into the sample container with the same volume as the standard sample container through the main controller according to the measurement requirements. If the quality of the sediment standard sample is poor, it will be sent back to the main controller and the antenna will send a wireless signal to transmit the weighing data to the wireless data receiver. Data processing calculates the sediment content in the river water. The invention adopts an equal-arm lever device, which offsets the quality of the river water to be measured after filtering the sediment, significantly expands the measurement range of the sediment content, improves the measurement accuracy of the sediment content, and realizes continuous high-precision automatic measurement of river water at any depth The sediment content and record the data, which improves the efficiency of measurement and monitoring.

Description

technical field [0001] The invention belongs to the field of automatic measurement and analysis of river sand, in particular to an automatic measurement and data recording device for sediment content in river water. Background technique [0002] Sediment content in river water is a very important data in hydrological observation. Rapid and accurate on-site detection and analysis of sediment content is a problem to be solved at present. There are many methods for measuring sediment content, such as drying weighing method, specific gravity method, gamma ray method, capacitance method and so on. The traditional drying weighing method and the specific gravity method belong to the direct measurement method. The drying method is to dry and weigh a certain sample after collecting it, and record the sediment content; To determine the sediment content, the measurement accuracy of the two methods is high, especially the drying weighing method, but this type of direct measurement meth...

AI Technical Summary

Problems solved by technology

The traditional drying weighing method and the specific gravity method belong to the direct measurement method. The drying method is to dry and weigh a certain sample after collecting it, and record the sediment content; Determining the sediment content, the measurement accuracy of the two is high, especially the drying weighing method, but this type of direct measurement method has obvious defects, the measurement process is cumbersome, the cycle is long, and it is not suitable for on-site measurement and data collection

The γ-ray method uses the attenuation law of the γ-ray to measure the sediment content after penetrating the object. After the gamma-ray absorption rate parameters of the measured object are calibrated, a higher measurement accuracy can be achieved, but after the γ-ray penetrates the object The attenuation is fast, and it is difficult to determine the absorption rate parameters, which affects the requirements for the measured object and the measurement accuracy, and the cost of this type of system is high and difficult to maintain

The capacitance method is to calculate the sediment content by using the corresponding relationship between the sediment content and the capacitance of the capacitor composed of liquid and cylindrical plate. When the liquid sediment content in the cylindrical plate changes, it is equivalent to the dielectric. Change, and then change the capacity of the capacitor, this method is suitable for continuous on-line measurement, but affected by the conductivity of the liquid, the measurement range and measurement accuracy are limited

In addition, the above measurement methods have many problems such as small measurement range and large error.

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