A Two-Dimensional Turbulence Sensor with Orthogonal Cantilever Beam Structure

Abstract

A two-dimensional turbulence sensor having an orthogonal cantilever beam structure, comprising a probe (1), a sheath (2), a front beam (3), a first sensitive element (4), a conversion connector (5), a rear beam (6), a second sensitive element (7), a rear seat (8), a sealing rod (9), and a conditioning circuit (10); the probe is mounted at the front end of the sheath, the front beam is mounted inside a front section of the sheath (2), the front beam is vertically placed, and the first sensitive element is mounted on the front beam; the front end face of the conversion connector is provided with a vertical notch (5a), a tail part of the front beam is inserted into the vertical notch, the rear end face of the conversion connector is provided with a horizontal notch (5b) in the horizontal direction, a head part of the rear beam is inserted into the horizontal notch, and the second sensitive element is mounted on the rear beam; the front beam and the rear beam are distributed in an orthogonally perpendicular manner in space to form a cantilever beam structure; and both the first sensitive element and the second sensitive element are connected to the conditioning circuit. The sensor achieves high-resolution observation of two-dimensional physical properties and spatial features of turbulence, and is able to provide a highly reliable detection means for research such as a formation and disappearance mechanism and a trajectory of motion of micro-scale turbulence.

Description

technical field [0001] The invention relates to the field of turbulence sensors, in particular to a two-dimensional turbulence sensor with an orthogonal cantilever beam structure. Background technique [0002] Ocean turbulence is one of the most important forms of ocean mixing. It has a great effect on the momentum, heat and mass transport of seawater, and has become an important research field in physical oceanography. In the process of formation and dissipation, turbulent flow is not isotropic in physical properties, but in scale, it presents certain spatial distribution characteristics. [0003] With the increasing awareness of the importance of ocean turbulence and the more in-depth and detailed research on turbulence mechanism, typical ocean phenomena such as myocline, boundary layer, and deep sea have put forward high-resolution vector evolution information requirements for turbulence observation. The observation of ocean turbulence is mainly realized by ocean observa...

AI Technical Summary

Problems solved by technology

If the distance is too large, such an approximate equivalent can not accurately obtain a single-point turbulent two-dimensional model; if the distance is too small, the coupling disturbance of the sensor will be serious, and it will bring challenges to the processing and installation process. This two-dimensional observation scheme for turbulent flow Can not achieve single-point high-precision, two-dimensional observation of turbulent flow under microstructure

However, the new scheme based on the piezoresistive effect and using the cilium-cross beam and silicon nanowire sensitive unit to realize the two-dimensional detection of turbulent flow has difficulties such as the fragility of the connection between the probe and the cross cantilever beam, and has higher requirements for sensor processing technology and precision. , there are challenges in sensor reliability and cost reduction

[0005] In addition, turbulence sensor technology is mainly concentrated in the United States, Germany, Canada and other countries, and there is a common problem of high cost. For example, the foreign PNS series and SPM series turbulence sensors are all single-point one-dimensional sensors, and the unit price is at least tens of thousands of yuan. , which brings cost problems for ocean observation in large areas and wide sea areas, and greatly hinders human beings' understanding, exploration, development and utilization of oceans

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