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U-shaped open channel supersonic flowmeter

A flowmeter and ultrasonic technology, applied in the field of measurement and metering, can solve the problems of difficult connection between channel and field water level, large water head loss, troublesome device installation, etc., and achieve the effect of low power consumption, large water head loss and high cost

Inactive Publication Date: 2009-09-23
HOHAI UNIV
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Problems solved by technology

Nowadays, the current measurement methods of this kind of open channel flow generally need to set up weirs, such as triangular weirs, rectangular weirs, etc., or install specific-shaped flow tanks, such as Parshall tanks, etc. These devices are troublesome to install and have a large head loss. The connection of canals at all levels in the canal irrigation area and the connection of field water levels has brought difficulties, so it is difficult to use weirs or troughs to measure water in farmland irrigation sites

Method used

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  • U-shaped open channel supersonic flowmeter
  • U-shaped open channel supersonic flowmeter

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Experimental program
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Embodiment Construction

[0014] hardware circuit see figure 1 As shown, the core unit single-chip microcomputer adopts ATmegal6L, the ultrasonic probe adopts 40KHz, the transmitting probe is connected with the single-chip microcomputer through the driving circuit, the receiving probe is connected with the single-chip microcomputer through the signal detection circuit, the driving circuit and the signal detection circuit are coordinated by the synchronous maintenance circuit; the temperature compensation circuit adopts digital The temperature integrated circuit DS18b20, its signal pin is directly connected with the single-chip computer; the storage module adopts 24C512 of EEProm, which is directly connected with the single-chip computer; the liquid crystal display module uses the Chinese dot matrix liquid crystal module LCD12864, and is connected with the single-chip computer through the serial communication mode; the keyboard input module is set with four Button, select the panel film light touch butto...

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Abstract

The invention relates to a U-shaped open channel supersonic flowmeter based on embedded system technique. The U-shaped open channel supersonic flowmeter adopts a supersonic distance measuring principle to design a measuring circuit with high precision; according to U-shaped open channel roughness factor and water depth-over current section area curve which are measured by experiments, a singlechip calculates instantaneous flow and accumulating water delivery amount according to a mathematical model and displays, transmits and stores the data. The U-shaped open channel supersonic flowmeter has the remarkable characteristic that no weir or groove is arranged in an open channel when in use, the complete appliance has the advantages of no non-contact measurement head loss, little volume, light weight, electricity saving, simple installation, and the like and can be widely applied to open channel water delivery metering in agriculture, environmental protection, and the like.

Description

1. Technical field [0001] The invention is an open channel flow measurement technology with a specific shape, and belongs to the technical field of measurement and measurement. 2. Background technology [0002] With the development of advanced agricultural technology and the aggravation of water shortage, water-saving irrigation technology has been gradually promoted. At present, in my country's construction of a number of water-saving and high-efficiency agricultural demonstration areas, due to cost and maintainability reasons, a large number of open channel irrigation networks have been built. In the past, extensive irrigation was used, and there was no need to measure the flow of water. Nowadays, the current measurement methods of this kind of open channel flow generally need to set up weirs, such as triangular weirs, rectangular weirs, etc., or install specific-shaped flow tanks, such as Parshall tanks, etc. These devices are troublesome to install and have a large head ...

Claims

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Application Information

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IPC IPC(8): G01F1/66
Inventor 彭世彰沈金荣缴锡云宋加才王莹韩金旭
Owner HOHAI UNIV
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