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Coriolis mass flow sensor

A mass flow and sensor technology, applied in the direction of direct mass flowmeter, mass flow measurement device, etc., can solve the problems of large flow velocity change, large detection error of detector, low detection sensitivity of Coriolis mass flow sensor, etc., and achieve small flow velocity change. , the effect of improving the detection sensitivity

Inactive Publication Date: 2014-10-15
BEIJING TIANCHEN BORUI TECH
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  • Abstract
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Problems solved by technology

However, when the fluid flows from the first linear part into the arc part, the flow velocity changes greatly, so that the detection error of the detector is relatively large, and the sensitivity of the Coriolis mass flow sensor is low.
[0004] Therefore, how to solve the problem of low detection sensitivity of the existing Coriolis mass flow sensor is a technical problem that those skilled in the art need to solve

Method used

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  • Coriolis mass flow sensor
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  • Coriolis mass flow sensor

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing.

[0026] The principle of the present invention: according to the Coriolis effect, the two measuring tubes 1, 2 are fixedly welded at the two ends of the measuring tubes 1, 2 with double spacers 6, 7, 8, 9. In addition, the two measuring tubes 1 and 2 are welded firmly to the outer end surface of the shunt in parallel to form a tuning fork to eliminate the influence of external vibration. Under the excitation of the exciter 3, the two measuring tubes 1 and 2 vibrate at their natural frequency, and the vibration phase is opposite. Due to the vibration effect of the measuring tubes 1 and 2, each fluid element flowing in the tubes gets a Coriolis acceleration, and the measuring tubes 1 and 2 are subjected to a Coriolis force opposite to the acceleration direction. Because the Coriolis force on the inlet and outlet ends of the measuring tubes 1 and 2 is in the opposite direction...

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Abstract

The invention discloses a Coriolis mass flow sensor. The Coriolis mass flow sensor comprises a measuring tube, which comprises an inlet segment, an outlet segment and a measuring segment comprising a first arc-shaped portion and a second arc-shaped portion positioned between the inlet segment and the first arc-shaped portion, an exciter for exciting vibration of the measuring tube, and a detector which is positioned on the first arc-shaped portion and is used for detecting a vibration signal of the measuring tube and obtaining the mass flow of fluid based on the vibration signal. By using the measuring tube, the sensitivity and mechanical quality factor of the Coriolis mass flow sensor can be increased effectively, and the flow field influence is lowered. Moreover, the measuring tube is low in flow resistance and pressure loss, can be used for measuring the mass flow of fluid with high viscosity and high impurity content, is easy to process, and is low in cost.

Description

technical field [0001] The invention relates to a mass flow sensor, in particular to a Coriolis mass flow sensor. Background technique [0002] Mass flow sensor is an important tool for production, saving energy, improving product quality, and improving economic benefits, and occupies an important position in the national economy. It is widely used in various fields such as petroleum, chemical industry, natural gas, environmental protection, medicine, hygiene, food, trade settlement and various machinery and equipment. Among them, the Coriolis mass flow sensor has been more and more used in the industry due to its high performance such as high precision, high reliability and high stability. [0003] Currently, a Coriolis mass flow sensor includes a housing, a measuring tube, a detector, and an actuator. Wherein, the measuring tube includes a first linear portion and a second linear portion arranged in parallel and at intervals, and an arc portion located at one end of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/84
Inventor 杨云博
Owner BEIJING TIANCHEN BORUI TECH