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Supersonic method of detecting the fixed-point liquid level in container

A technology for detecting containers and ultrasonic waves, which is applied in the direction of instruments, measuring devices, liquid level indicators, etc., and can solve problems that affect the popularization and application of detection methods, poor reliability, troublesome installation of detection devices, etc.

Inactive Publication Date: 2004-11-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the troublesome installation and poor reliability of the detection devices used in the existing similar detection methods, the popularization and application of this detection method has been affected.

Method used

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  • Supersonic method of detecting the fixed-point liquid level in container
  • Supersonic method of detecting the fixed-point liquid level in container
  • Supersonic method of detecting the fixed-point liquid level in container

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Embodiment Construction

[0013] refer to Figure 1 to Figure 9 , the method of the present invention is carried out according to the following steps: 1.1 utilizes the ultrasonic sensor 1 that is coupled on the outer wall of the container to transmit high-frequency pulsed ultrasonic waves in the container through the container wall 10; 1.2 detects the ultrasonic residual vibration energy in the container wall 10 with the ultrasonic sensor 1 signal, that is, to measure the change of the aftershock energy signal; 1.3 compare the actually measured aftershock energy signal and attenuation characteristics with the pre-set standard eigenvalues ​​of the aftershock energy signal to determine whether the liquid level 11 in the container has reached Control point; 1.3.1 When the measured residual vibration energy lasts for a short time, the residual vibration energy signal decays quickly, that is, the liquid level 11 reaches or exceeds the measurement control point; 1.3.2 When the measured residual vibration ener...

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Abstract

The supersonic method of detecting fixed-point liquid level in container includes emitting HF pulse supersonic wave by means of the supersonic sensor attached to outer wall of the container via the wall; detecting supersonic wave after-vibration energy in the wall to measure the change in after-vibration energy by means of the sensor; comparing the measured after-vibration energy signal and attenuation characteristic with the after-vibration energy signal characteristic value calibrated in advance to determine if the liquid level inside the container reaches the control point; and issuing command or warning to relative equipment and person according to the measurement.

Description

technical field [0001] The invention relates to a method for detecting the fixed-point liquid level of a container by using ultrasonic waves. Background technique [0002] In many industrial sites, the high and low level indication and alarm of the liquid level inside the closed container or pressure vessel are very important for the control of production operation and the safety of production. Due to the particularity of the working conditions of the container, the non-invasive detection method is welcomed by users because of its convenient installation, no pressure, no pollution, no corrosion, and easy to make an explosion-proof structure. Especially for containers containing high-pressure, flammable, explosive, and highly corrosive liquids, non-intervention is often the preferred method. Even in some high-pressure containers, due to structural safety considerations and relevant safety regulations, it is not allowed to Additional equipment mounting holes are provided in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/296
Inventor 马志敏
Owner WUHAN UNIV
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