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Constant-flow bubble type automatic water level measurement method

An automatic measurement, bubble technology, applied in the field of sensor measurement, can solve problems such as large errors

Active Publication Date: 2009-11-25
STATE GRID ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in many applications, there is a large error between the measured value of the constant-flow bubble water level gauge and the manual observation value, and the greater the water level variation, the greater the error

Method used

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  • Constant-flow bubble type automatic water level measurement method
  • Constant-flow bubble type automatic water level measurement method
  • Constant-flow bubble type automatic water level measurement method

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Embodiment Construction

[0018] Water level automatic measuring method of the present invention comprises telemetry station 1 and central station 2, as figure 1 shown. The telemetry station is composed of a number setting device 3 , a data collector 4 , a barometer 5 , a constant-flow bubble water level gauge 6 , a communication device 7 and a power supply 8 . The central station consists of a communication device 9, a computer 10 and a power supply 11.

[0019] The water level measurement process is as follows: image 3 shown. The data collector regularly collects the pressure output value P of the constant-flow bubble water level gauge according to the preset working mode. 0 and the gas temperature T in the tube, and the pressure output value P of the barometer Aa , calculate the water head height according to the formula (E13), correct the actual water level according to the height, and send the water level data to the central station through the communication terminal for display, storage and ...

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Abstract

The invention belongs to the field of sensor measurement, and in particular relates to a method for automatically measuring water level by adopting a constant-flow bubble type water gauge, which comprises the following steps: measuring vertical height difference H of two ports of an air duct and mounting height h0 of an air exhaust; inputting a gravity acceleration g, the height difference H of the two ports of the air duct and the mounting height h0 of the air exhaust into a data acquisition device through a register; acquiring a pressure output value P0 of the constant-flow bubble type water gauge and a gas temperature T in the duct by the data acquisition device in fixed time; and acquiring a pressure output value PA of a barometer by the data acquisition device in fixed time. The invention provides the method more accurate than classic pressure water level relation conversion formula, and discloses that the vertical height difference of the two ports of the air duct is the main reason for influencing the measuring precision of the constant-flow bubble type water gauge, but not the difference of the gravity acceleration or water density. The method can effectively reduce the water level measurement error, and has more obvious effect particularly when the vertical height difference of the two ports of the air duct exceeds 10 meters.

Description

technical field [0001] The invention belongs to the field of sensor measurement, in particular to a method for automatically measuring water level by using a constant-flow bubble-type water level gauge. Background technique [0002] The working principle of the constant flow bubble water level gauge: the pressure sensing unit is connected to the air pipe through the air circuit device, and the open end of the air pipe is fixed under the water surface. When the air pressure and water pressure in the air circuit device reach a balance, the pressure sensing unit will Convert to water level height. [0003] Compared with the traditional float-type water level gauge, the constant-flow bubble-type water level gauge has the advantages of simple installation, no need to build a water level well, small civil engineering workload, low investment, short construction period, and large range. It is currently used in hydrological automatic measurement and reporting systems. more and more...

Claims

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Application Information

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IPC IPC(8): G01F23/14
Inventor 熊光亚曹年红曹翊军程序周海
Owner STATE GRID ELECTRIC POWER RES INST
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