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Device and method for measuring long-term average flow rate of water current

A technology of average flow velocity and measuring device, applied in the direction of average speed measurement, measurement device, speed/acceleration/impact measurement, etc., can solve the problems such as methods that use chemical principles that have not yet been seen, and achieve easy popularization, simple production and simple structure. Effect

Active Publication Date: 2014-07-23
海口百川海洋生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In addition, there are also some inventions that can measure the relative flow rate without additional electric energy. They are mainly based on the principle of mechanical method and heat dissipation method. There is no method that uses chemical principles.

Method used

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  • Device and method for measuring long-term average flow rate of water current

Examples

Experimental program
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Effect test

Embodiment 1

[0031] For sea areas where the average flow velocity is 0.2-2m / s, the average flow velocity for 30 days can be measured. Use a glass columnar container with an inner diameter of 10 mm, a frosted inner surface, an inner depth of 100 mm, and the interior is filled with calcium sulfate. Before hanging in the sea area, weigh the container first, and record the actual mass as m1. Then hang it in the measurement sea area according to the method in the steps, and the suspension period is to hang in the measurement sea area for 30 days. After a suspension cycle is over, retrieve the container, remove other organisms on the inner and outer surfaces of the container, wash the inner and outer surfaces of the container, dry it, and then weigh it, record it as m2, and obtain the mass difference m between m1 and m2. The mass difference m is divided by the suspension period of 30 days, and the average velocity of the sea area during this period can be obtained.

Embodiment 2

[0033] For sea areas where the average flow velocity is 0.1-1m / s, the average flow velocity for a whole year can be measured. A stainless steel columnar vessel is used, with an inner diameter of 5mm and an inner depth of 300mm, filled with calcium sulfate. Before hanging in the sea area, weigh the container first, and record the actual mass as m1. Then hang it in the measurement sea area according to the method in the steps, and the suspension period is to hang in the measurement sea area for one year. After a suspension cycle is over, retrieve the container, remove other organisms on the inner and outer surfaces of the container, wash the inner and outer surfaces of the container, dry it, and then weigh it, record it as m2, and obtain the mass difference m between m1 and m2. Dividing the mass difference m by the suspension period for one year, the average velocity of the sea area during this period can be obtained.

Embodiment 3

[0035] For sea areas where the average flow velocity is 0.1-0.5m / s, the average flow velocity for 10 days can be measured. A PVC columnar container is used, with an inner diameter of 20mm and an inner depth of 200mm, filled with calcium carbonate. Before hanging in the sea area, weigh the container first, and record the actual mass as m1. Then hang it in the measurement sea area according to the method in the steps, and the suspension period is to hang in the measurement sea area for 10 days. After a suspension cycle is over, retrieve the container, remove other organisms on the inner and outer surfaces of the container, wash the inner and outer surfaces of the container, dry it, and then weigh it, record it as m2, and obtain the mass difference m between m1 and m2. The mass difference m is divided by the suspension period of 10 days, and the average velocity of the sea area during this period can be obtained.

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Abstract

The invention discloses a device and a method for measuring long-term average flow rate of water current and relates to a measuring device of water flow rate. The measuring device is provided with an open container, in which an insoluble stuffing is filled; the external side of the container is provided with a suspension part for suspending the container. The measuring method comprises the following steps of: filling the insoluble stuffing in the container, measuring and recording mass m1 of the device for measuring long-term average flow rate of water current, then suspending the container with downward opening and fixing in water to be measured; after the suspension period is finished, taking back the device for measuring long-term average flow rate of water current, removing impurities and epizoic organisms on the internal surface and the external surface of the device for measuring long-term average flow rate of water current, cleaning and drying in the air, and measuring rest mass m2 of the device for measuring long-term average flow rate of water current; measuring the mass difference between m1 and m2; dividing the measured mass differences of the device for measuring long-term average flow rate of water current in two different water bodies, and obtaining a relative flow rate value of two different water bodies. The method and the device disclosed by the invention are applicable to comparison of the long-term average flow rate of the same water basin at different positions.

Description

technical field [0001] The invention relates to a measuring device for water flow velocity, in particular to a method and a device for measuring long-term average flow velocity of water flow suitable for comparing long-term average flow velocity at different positions in the same watershed. Background technique [0002] Velocity is an important physical parameter of water flow, and its accurate measurement plays a decisive role in industrial and agricultural production and national security. At present, the measurement of the flow velocity of rivers, lakes and seas is mainly instantaneous and short-term. According to the measurement principle, there are the following three flow velocity measurement methods. The first is the conventional flow measurement method, which is suitable for use in experiments with clear water quality and stable flow velocity. The second is the remote-control current measurement method, which is suitable for tests where the measuring point is far aw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P11/00
Inventor 欧徽龙龚琳王德祥许肖梅柯才焕
Owner 海口百川海洋生物科技有限公司
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