Ultrasonic flower meter for eliminating zero point error

A zero point error and ultrasonic technology, applied in the field of ultrasonic flowmeter, can solve the problems of large zero point error of ultrasonic flowmeter, large measurement error of flowmeter, ultrasonic propagation time difference, etc., and achieve the effect of eliminating zero point error.

Inactive Publication Date: 2011-05-18
郭荣岭
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

The disadvantage of the ultrasonic flowmeter with this structure is: the measured time difference is composed of two parts, the first is the ultrasonic propagation time difference caused by the fluid flow, this time difference is the real time difference; the second is the probe and the circuit asymmetric delay caused by The time difference, this time difference is the error time difference
These two time differences are superimposed and cannot be distinguished, so the ultrasonic flowmeter has a large zero point error
In practical applications, since the ultrasonic probe cannot achieve consistent characteristics in manufacturing, the zero point error will change with factors such as temperatur

Method used

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  • Ultrasonic flower meter for eliminating zero point error
  • Ultrasonic flower meter for eliminating zero point error
  • Ultrasonic flower meter for eliminating zero point error

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Embodiment Construction

[0007] The present invention will be further described with reference to the accompanying drawings.

[0008] The main design of the ultrasonic flowmeter for eliminating zero-point error of the present invention is to use a sound guide column to divide the sound wave into two paths, one path is a fast sound wave, and the other path is a slow sound wave. The fast sound wave is used to measure the error time difference formed by the asymmetry of the circuit and the probe, and the slow sound wave is used to measure the composite time difference of the real time difference and the error time difference, and then subtract the error time difference from the composite time difference to obtain the real time difference, from The zero point error is basically eliminated. Therefore, the ultrasonic flowmeter for eliminating zero point error according to the present invention has a main structure of an outer tube 1, an ultrasonic transmitting probe and an ultrasonic receiving probe are ins...

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Abstract

The invention discloses an ultrasonic flower meter for eliminating zero point error, which comprises an outer tube, wherein an ultrasonic transmitting probe and an ultrasonic receiving probe are arranged in the outer tube; an ultrasonic column is arranged in the outer tube; the ultrasonic transmitting probe and the ultrasonic receiving probe are positioned at the positions of two ends of the ultrasonic column respectively; the ultrasonic transmitting probe and the ultrasonic receiving probe are arranged in the outer tube by adopting a strutting piece respectively; and the ultrasonic column is connected with the outer tube through the strutting piece. The ultrasonic flower meter can overcome the defects of the prior art, eliminate zero point error and fulfill the purpose of accurate measurement.

Description

technical field [0001] The invention relates to a flow meter, which is an ultrasonic flow meter capable of eliminating zero point errors. Background technique [0002] Ultrasonic flowmeters are widely used due to their advantages of accurate measurement and unimpeded operation compared with flowmeters with mechanical structures. However, the main structure of the transit-time ultrasonic flowmeters currently on the market is to install two ultrasonic probes upstream and downstream of the fluid, namely: the upstream probe and the downstream probe, the distance between the probes is fixed, and the ultrasonic probe is duplex. Yes, it can be used to transmit ultrasonic waves or receive ultrasonic waves. When there is fluid flow, there is a linear superposition relationship between the propagation speed of ultrasonic waves between the two probes and the flow velocity of the fluid. When the ultrasonic waves propagate smoothly, the speed must be added to the speed of the fluid. When...

Claims

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Application Information

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IPC IPC(8): G01F1/66
Inventor 郭荣岭
Owner 郭荣岭
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