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High-precision sensor verifying apparatus

A technology for calibrating devices and sensors, which is applied to measuring devices, instruments, and measuring fluid pressure, etc., can solve problems such as small measuring range and narrow application range, and achieve the effect of large measuring range, wide application range and high precision

Active Publication Date: 2015-08-05
中国船舶重工集团公司第七〇二研究所
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Problems solved by technology

[0007] In order to overcome the shortcomings of the current common underwater surface shear stress sensor calibration device, which can only be used for laminar flow measurement calibration, with a small range and narrow application range, to achieve the purpose of conveniently and accurately calibrating the underwater surface shear stress sensor, the present invention A high-precision sensor calibration device is provided to calibrate the miniature surface shear stress sensor

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Embodiment Construction

[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] The high-precision sensor calibration device of the present invention includes a mechanical structure module and an electrical system module.

[0029] 1) Mechanical structure module:

[0030] Such as figure 1 and figure 2 As shown, the mechanical structure module is a horizontally placed circulation pipeline structure, the medium in the circulation pipeline is water flow, and includes equipment for adjusting the fluid in the circulation pipeline to transform into a stable and developing turbulent flow and equipment for monitoring fluid flow parameters. Specifically, in figure 1 and figure 2 In the embodiment of the present invention, a water inlet box 1 and a water outlet box 7 are included, and the water inlet box 1 and the water outlet box 7 are connected by a test channel and a return channel.

[0031] The test channel can b...

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Abstract

Disclosed in the invention is a high-precision sensor verifying apparatus for calibration and benchmark checking of an underwater surface shearing strength sensor. The apparatus comprises a water inlet tank, a water outlet tank, a test channel, and a return channel, wherein the test channel and the return channel are arranged between the water inlet tank and the water outlet tank. The test channel consists of a stable segment, a contraction segment, a verifying sensor experiment segment, a transmission segment, and an extension tube. The verifying sensor experiment segment includes an upper wall board and a lower wall board; static pressure measuring holes are formed in the center line of the lower wall board; and a die mounting hole is formed in the upper wall board. The return channel is formed by connection of a rectangular bending corner pipe, an outlet square-circular transition pipe, an upper-lower bending pipe, a water pump outlet bending pipe, and an inlet square-circular transition pipe. Besides, a centrifugal pump, a pressure regulating valve, and an electromagnetic flow meter are installed at the return channel. The Reynolds number is high; the apparatus is suitable for the laminar flow / turbulent flow conditions; and an objective of convenient, rapid and accurate verification of an underwater surface stress sensor can be achieved.

Description

technical field [0001] The invention relates to a calibration device for fluid experiment sensors, more specifically, to a calibration device for underwater surface shear stress sensors such as MEMS (micro-electromechanical system) sensor calibration and benchmark testing. Background technique [0002] The measurement of shear stress on the surface of underwater objects can provide very valuable information for the study of many hydrodynamic problems, such as turbulent transition, flow separation, frictional resistance, and surface flow distribution. Before using the sensor to measure the surface shear stress, the sensor needs to be calibrated first. [0003] The existing surface shear stress sensor calibration methods are almost all for MEMS sensors that measure shear stress in the air. Research on Measurement and Test Technology" introduces a single crystal silicon material comb-shaped floating element capacitive MEMS shear stress balance and its calibration system develo...

Claims

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Application Information

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IPC IPC(8): G01L27/00
Inventor 田于逵谢华李明政孙海浪宋长友朱建良
Owner 中国船舶重工集团公司第七〇二研究所
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