Method and device of automatically monitoring suspended load sediment by replacement method

Abstract

The invention discloses a method and a device of automatically monitoring suspended load sediment by a replacement method. The device includes an overwater portion and an underwater portion. The underwater portion includes a lead fish and a cable. A submersible pump is mounted on the cable above the lead fish. A water inlet of the submersible pump is parallel to a main line of the lead fish. An upper water pipe of the submersible pump protrudes from a water surface and is provided with a solenoid valve. The overwater portion includes a water container. The water container is placed on a weighing sensor through a support frame. An overflow water pipe is arranged at an upper end of the water container. An upper end of the overflow water pipe opens into an overflow drainage pipe. A drainage pipe is arranged at a lower end of the water container. A solenoid valve is arranged on the drainage pipe. A first temperature sensor is mounted at the same height as the submersible pump. A second temperature sensor is mounted at the overflow drainage pipe. According to the device, automation of observing of suspended load sediment of rivers can be realized, manual intervention and errors caused by manual intervention are greatly reduced, work efficiency can be improved by dozens of times, and energy consumption is greatly reduced.

Description

Technical field: [0001] The invention relates to a hydrological sediment monitoring technology, in particular to a method and device for automatically monitoring suspended sediment by displacement. Background technique: [0002] River sediment testing is one of the important contents of hydrological monitoring. The "Code for Testing Suspended Sediment in Rivers" (GB / T 50159-2015) (hereinafter referred to as the "Specification") stipulates the test methods for sediment, including drying method, displacement method and filtration method. However, no matter which method is used, in order to achieve the required accuracy, it is necessary to take more water samples, and to carry out sedimentation, filtration, drying and other water sample treatments in the sand sample room. It takes a long time to complete a sand measurement process. Or it needs to consume a lot of electric energy for drying, which takes a long time, has poor timeliness, requires a lot of manpower, and makes it ...

AI Technical Summary

Problems solved by technology

However, no matter which method is used, in order to achieve the required accuracy, it is necessary to take more water samples, and to carry out sedimentation, filtration, drying and other water sample treatments in the sand sample room. It takes a long time to complete a sand measurement process. Or it needs to consume a lot of electric energy for drying, which takes a long time, has poor timeliness, requires a lot of manpower, and makes it difficult to share information

For a long time, many explorations have been made on automatic sand measurement technology at home and abroad, such as photoelectric method, isotope method, vibrating tube method, ultrasonic method, etc., but due to the constraints of some factors of the new instrument, the direct use in hydrological stations is limited, and there is currently no A mature technology for automatic monitoring of suspended sediment has been written into the "Specifications", and there is no method to form a product that can be popularized and used, and it is still in the experimental state

Due to these technical limitations, sand measurement at home and abroad is basically still in the state of manual work, which has become an insurmountable shortcoming in the field of hydrological monitoring and an urgent problem to be solved

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