Flow velocity vertical line distribution measuring device

Abstract

The invention provides a flow velocity vertical line distribution measuring device, which comprises a bracket assembly and a flow velocity measuring rod, and is characterized in that the flow velocity measuring rod comprises a rod body and a plurality of flow velocity measuring control circuits; the flow velocity measurement control circuit comprises an electromagnet control circuit and a flow velocity display circuit; the electromagnet control circuit comprises a water baffle, a spring coil and an iron core, the iron core is fixedly arranged, and the spring coil is wound on the iron core; the flow velocity display circuit comprises a permanent magnet, a spring, a slide rheostat and an ampere meter, when the water baffle is impacted by water flow, the water baffle compresses a spring coil to increase magnetic force generated by an electromagnet composed of the spring coil and an iron core, then the permanent magnet is pushed to compress the spring to reduce access resistance of the slide rheostat, and current of a corresponding branch is increased; as the flow velocity at each position on the flow velocity measuring rod is different, the readings of the ampere meters connected with the branches are different, and the flow velocity at each vertical position is output in the form of an electric signal, so that the sediment starting flow velocity can be calculated according to the relationship between the current and the flow velocity.

Description

technical field [0001] The invention relates to the technical field of flow velocity measurement, in particular to a flow velocity vertical distribution measuring device. Background technique [0002] The vertical distribution of flow velocity has many uses in hydraulic engineering. For example, the starting conditions of sediment are generally represented by the average velocity of the vertical line, which is called the starting velocity. In order to obtain the average vertical velocity, the vertical distribution of velocity must be known. Most of the conventional flow velocity measurement devices can only measure the flow velocity of a certain point or a tiny water column at a certain time. This kind of flow velocity measurement device belongs to the "point type" type, which cannot obtain the average flow velocity of the vertical line at that moment; The method of arranging multiple "point" type devices at the same time to measure the vertical distribution of flow veloci...

AI Technical Summary

Problems solved by technology

Most of the conventional flow velocity measurement devices can only measure the flow velocity of a certain point or a small water column at a certain moment. The practice of arranging multiple "point-type" devices at the same time to measure the vertical distribution of flow velocity, the measurement results are often inaccurate due to the disturbance of the water flow by multiple measuring devices or the mutual interference between the devices; In addition, if the number of measuring devices is large, the purchase cost will increase, and the arrangement and installation of the devices in the actual measurement will become difficult.

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