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An underwater wall shear stress sensor calibration device with temperature control function

A calibration device and shear stress technology, applied in measuring devices, instruments, measuring fluid pressure, etc., can solve the problems of inability to achieve calibration, unknown influence, and inability to achieve calibration work.

Active Publication Date: 2018-07-20
NANJING HYDRAULIC RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The existing technology cannot realize the calibration under the turbulent flow state based on the temperature correction method;
[0007] 2. The existing technology cannot realize the calibration work under different water temperature conditions;
[0008] 3. Since the influence of suspended matter and electrolyte on the hot film shear stress sensor is unknown, there is no application of the hot film shear stress sensor in the environment with suspended matter or electrolyte to measure in the prior art

Method used

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  • An underwater wall shear stress sensor calibration device with temperature control function
  • An underwater wall shear stress sensor calibration device with temperature control function
  • An underwater wall shear stress sensor calibration device with temperature control function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] refer to Figure 1-Figure 3 , an underwater wall shear stress sensor calibration device with temperature control function, comprising: wide flat long straight rectangular pipe 1, fixed mounting bracket 5, water pipe 4, electromagnetic flowmeter 3, triangular water measuring weir 6, constant temperature water tank 7, Power water pump 10, mixing water pump 9, heating rod 8, temperature sensor 11-1, temperature sensor 11-2, temperature control system 18.

[0074] Wide, flat, long and straight rectangular pipes 1 are fixed on a solid foundation through a fixed mounting bracket 5. The wide, flat, long and straight rectangular pipe 1 is made of smooth and transparent plexiglass, with a length of 3m, a width of 0.15m, and a height of 0.02m. The fixed mounting bracket 5 at the bottom adopts a truss structure to ensure the stability of the wide, flat, long and straight rectangular pipe 1 during the calibration process. There is a square installation window 2 with a side length ...

Embodiment 2

[0113] Using the device to measure the influence of the concentration of suspended substances on the measurement results of the underwater thermal film shear stress sensor adopts the following method of suspended substances.

[0114] refer to Figure 1-Figure 3 , a schematic diagram of an underwater wall shear stress calibration device with temperature control function, including: a wide, flat, long and straight rectangular pipe 1, a fixed mounting bracket 5, a water pipe 4, an electromagnetic flowmeter 3, a triangular water measuring weir 6, a constant temperature water tank 7, Power water pump 10, mixing water pump 9, heating rod 8, temperature sensor 11-1, temperature sensor 11-2, temperature control system 18.

[0115] The device in embodiment 2 is the same as that in embodiment 1, and has the same specifications and installation methods.

[0116] S1, the hot-film shear stress sensor used in the wall shear stress measurement has been calibrated in the process of embodimen...

Embodiment 3

[0137] Using the device to measure the effect of electrolyte concentration on the measurement results of the underwater hot film shear stress sensor adopts the following electrolyte method.

[0138] refer to Figure 1-Figure 3, a schematic diagram of an underwater wall shear stress calibration device with temperature control function, including: a wide, flat, long and straight rectangular pipe 1, a fixed mounting bracket 5, a water pipe 4, an electromagnetic flowmeter 3, a triangular water measuring weir 6, a constant temperature water tank 7, Power water pump 10, mixing water pump 9, heating rod 8, temperature sensor 11-1, temperature sensor 11-2, temperature control system 18.

[0139] The device in embodiment 3 is the same as that in embodiment 1, and has the same specification and installation method.

[0140] E1, the hot-film shear stress sensor used for wall shear stress measurement has been calibrated in Embodiment 1, and has the following calibration formula:

[0141...

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Abstract

The invention discloses an underwater wall surface shear stress sensor calibration device having a temperature control function, belonging to the hydrodynamics test research field. The underwater wall surface shear stress sensor calibration device comprises a flat-wide long straight rectangle pipeline, a fixing installation support, a water pipe, an electromagnetic flow meter, a triangle measuring weir, a temperature constant water tank, a power water pump, a blending water pump, a heating rod, a temperature sensor, a temperature-control system and a corresponding calibration method. The beneficial effects of the invention are that: the invention provides a device for calibrating the underwater heat membrane type shear stress under the condition of the aqueous medium and the turbulent flow; the shear stress sensor calibration device can perform stable calibration on the heat membrane type shear stress sensor under various temperatures; and the device can perform research on effect of the suspended load and the electrolyte concentration on the measurement result of the underwater heat membrane type shear stress sensor.

Description

technical field [0001] The invention relates to an underwater wall shear stress sensor calibration device with temperature control function, which belongs to the field of hydrodynamic test research, and in particular relates to an underwater wall thermal film type shear stress sensor calibration device with automatic temperature control function. Background technique [0002] The sediment problem is one of the important problems in the construction of water conservancy projects such as rivers and coasts. Its movement and transport are mainly limited by the shear stress of the bed surface. Therefore, the effective measurement of the shear stress of the underwater wall surface is of great significance to the mechanism research of the sediment movement problem. . There has been no effective and feasible measurement method for underwater wall shear stress. At present, the commonly used direct measurement method is to calculate the shear stress by measuring the displacement of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L27/00
Inventor 夏云峰徐华郝思禹张世钊吴道文闻云呈杜德军王晓航蔡喆伟王晓俊赵泽亚陈凯华闫杰超李伟陈靖
Owner NANJING HYDRAULIC RES INST
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