System for detecting sediment content by adopting capacitive differential pressure sensors

Abstract

The invention discloses a system for detecting sediment content by adopting capacitive differential pressure sensors. The system comprises a water sample pretreatment system, a signal acquisition system, a control treatment system, and a touch screen display system, wherein the systems are orderly connected, the touch screen display system is connected to a data transmission system; the data transmission system is connected with a configuration monitoring system; the signal acquisition system comprises a depth sensor, a sediment content sensor, a flow velocity sensor, a water temperature sensor and an analog quantity input / output module; and the depth sensor, the sediment content sensor, the flow velocity sensor and the water temperature sensor are connected with the analog quantity input / output module respectively; and the analog quantity input / output module comprises four analog signal input channels. The system comprehensively considers a plurality of environmental factors, realizes the high-accuracy sediment content measurement, can be applied in the field of general river sediment detection, and can also be applied in fields such as water quality management of reservoir areas and channel cleanout of yellow river basin, sludge discharge management of sewage treatment plants and the like.

Description

technical field [0001] The invention relates to the field of sediment content detection, in particular to a sediment content detection system using a capacitive differential pressure sensor. Background technique [0002] Soil erosion has extremely serious hazards. First, it directly destroys soil resources, resulting in a reduction in the area of ​​arable land. Soil is the basis for the growth of green plants necessary for human survival. Once the exposed slopes are scoured by heavy rains, the surface soil rich in humus will be lost, resulting in a decline in soil fertility. With the deepening of soil erosion, the development of gullies is also increasing. In this way, a large area of ​​sloping cultivated land is fragmented, inconvenient to cultivate, and even abandoned. Secondly, the lost sediment material enters rivers, lakes and reservoirs, deposits reservoirs, blocks river courses, and raises river beds. Due to soil erosion in the upstream basin, the amount of sedim...

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Problems solved by technology

For example, the manual sampling method has high precision, but its measurement cycle is long and labor-intensive, and because the layered structure of the floating mud is disturbed during manual sampling, the measured results cannot reflect the on-site conditions; the photoelectric method measures sediment The range is narrow; the isotope method and the γ-ray method have high precision, but the radioactive source is scarce; the vibrating cylinder method and the capacitance method have poor stability and are greatly affected by temperature; and the existing pressure sensor based on the principle of pressure difference has low sensitivity and is mainly used It is used for the density measurement of the floating mud layer on the seabed and the concentration measurement of the pulp tank, etc.; the ultrasonic monitoring equipment has problems such as unstable operation and easy to be entangled by aquatic plants.

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