Precision-adjustable water level measuring device and method

A water level measurement and precision technology, applied in the field of water level measurement devices with adjustable precision, can solve the problems of high price, large environmental impact, and difficult sensor installation, and achieve the effects of convenient maintenance and simple structure

Active Publication Date: 2022-03-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the method of collecting receipts and automatically measuring the water level disclosed in the above-mentioned patent reduces labor intensity and improves work efficiency and detection accuracy, in the actual use process, the sensor is difficult to install, difficult to maintain, and greatly affected by the environment. and expensive

Method used

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  • Precision-adjustable water level measuring device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Such as Figure 6 As shown, the I end of the U-shaped gas-liquid difference measuring tube 50 communicates with the reference water tank 71, and the II end communicates with the measured model 73 through the remote detection head 30; when the liquid level of the pressure measuring tube at the I end is higher than the reference water level h 1 , the liquid level of the pressure measuring tube at the Ⅱ end is higher than the reference water level h 2 , when the water level of the measured model 73 is lower than the reference water level Δh, since the pressure of the liquid level of the pressure measuring tube at the end I is equal to that of the liquid level of the pressure measuring tube at the end II, the following relationship exists between the two:

[0068]

[0069] which is

[0070] Δh=h 1 -h 2

[0071] Where: ρ is the density of the liquid to be measured, in kg / m 3 ;g is the local gravity acceleration, the unit is m / s 2 ; P is the water surface pressure in...

Embodiment 2

[0073] Such as Figure 7 As shown, the I end of the U-shaped gas-liquid difference measuring tube 50 communicates with the reference water tank 71, and the II end communicates with the measured model 73 through the remote detection head 30; when the liquid level of the pressure measuring tube at the I end is higher than the reference water level h 1 , the liquid level of the pressure measuring tube at the Ⅱ end is lower than the reference water level h 2 , when the water level of the measured model 73 is lower than the reference water level Δh, and the liquid level of the piezometric tube at the end II is higher than that of the measured model 73, since the liquid level of the piezometric tube at the end I is equal to the pressure of the liquid surface of the piezometric tube at the end II, the two There is the following relationship among them:

[0074]

[0075] which is

[0076] Δh=h 1 -h 2

[0077] At this time, h 2 is a negative number.

Embodiment 3

[0079] Such as Figure 8 As shown, the I end of the U-shaped gas-liquid difference measuring tube 50 communicates with the reference water tank 71, and the II end communicates with the measured model 73 through the remote detection head 30; when the liquid level of the pressure measuring tube at the I end is higher than the reference water level h 1 , the liquid level of the pressure measuring tube at the Ⅱ end is higher than the reference water level h 2 , when the water level of the measured model 73 is higher than the reference water level Δh, and the liquid level of the piezometric tube at the end II is higher than the water level of the measured model 73, since the liquid level of the piezometric tube at the end I is equal to the liquid surface pressure of the piezometric tube at the end II, therefore, The following relationship exists between the two:

[0080]

[0081] which is

[0082] Δh=h 1 -h 2

[0083] At this time, Δh is a negative number.

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Abstract

The invention discloses a precision-adjustable water level measuring device which comprises a base provided with a three-dimensional displacement system, a long-distance detection head is movably fixed on the three-dimensional displacement system, the long-distance detection head is communicated with an adjustable reading table, and the adjustable reading table is detachably fixed on the base; the adjustable reading table comprises a bottom plate and an inclined table top provided with a ruler, a U-shaped gas-liquid difference measuring tube is detachably fixed on the inclined table top, and the two ends of the U-shaped gas-liquid difference measuring tube are communicated with the remote detection head and the reference water tank respectively; a supporting rod for adjusting the included angle between the inclined table top and the bottom plate is arranged on the inclined table top; and a reading adjusting device is arranged on the U-shaped gas-liquid difference measuring tube. By adjusting the measurement precision, the device can meet different precision requirements of various scenes on model indexes. The invention further discloses a water level measuring method which comprises the steps of determining a measuring original point, calculating coordinates of a point to be measured, adjusting precision and measuring water level data of the point to be measured.

Description

technical field [0001] The invention relates to a water level measuring device, in particular to an adjustable precision water level measuring device and method. Background technique [0002] Water level is a hydraulic element that reflects changes in water body and water flow, and is the most basic observation element in hydraulic testing. The traditional water level measurement method is to install a water gauge to read visually. However, this measurement method is not only labor-intensive, but also has low measurement efficiency and large errors; Measurement methods. [0003] In the prior art, a device for measuring water level using a sensor is disclosed in a Chinese patent with the publication number CN111623853A, which discloses a laser measuring device for measuring the water level of a reservoir and a measurement method thereof, wherein a laser measuring device for measuring the water level of a reservoir is disclosed, including infrared measurement The distance tr...

Claims

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Application Information

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IPC IPC(8): G01F23/14G01F23/16
CPCG01F23/14G01F23/162
Inventor 万五一王眺詹航
Owner ZHEJIANG UNIV
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