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Fluid level measurement device

A device and fluid technology, applied in the field of fluid level measurement equipment, can solve problems such as affecting the accuracy of measurement, and achieve the effect of improving comprehensive measurement

Active Publication Date: 2012-07-18
AXSENSOR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gas composition often changes throughout the measuring device, resulting in different sound velocities at different parts of the measuring device, which significantly affects the accuracy of the measurement

Method used

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Experimental program
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Embodiment Construction

[0031] figure 1 A preferred embodiment of the measuring device according to the invention is shown. A measuring device is used to determine the liquid level in the tank. The tank may be, for example, a fuel tank of a boat or a vehicle such as a car or truck. The liquid to be measured can be, for example, water, petrol or diesel etc. shown in figure 1 The tank in also contains the fuel pump 11.

[0032] exist figure 1 Among them, the measuring device 10 according to the invention comprises a waveguide 12 connected at one end to a transducer 14 and extending at the other end into a fluid 16 contained in a tank 18 . The end 20 of the waveguide 12 that extends into the fluid 16 has an opening that allows fluid to enter the waveguide. Additionally, the end 20 of the waveguide extending into the fluid is preferably partially fixed to the bottom of the tank 18 . This ensures the position of the end 20 of the waveguide 12 and ensures that the liquid level is measured from the v...

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PUM

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Abstract

The present invention relates to a device (10) for providing a gas composition compensated acoustic measurement of the level of a liquid (16) in a tank (18). The device comprises a transducer (14) arranged outside said liquid for transmitting and receiving acoustic signals, and a waveguide (12) connected to said transducer and extending into the liquid. The device further comprises means for feeding a flow of fluid from said tank into the part of said waveguide which is located above the liquid level. That results in that the gas composition become essentially similar throughout the whole of the waveguide located above the liquid level, whereby the level measurement using the speed of sound in the waveguide, which speed is dependant on gas composition, becomes very accurate.

Description

[0001] This divisional application is based on the divisional application of the Chinese patent application with the application number 200480037411.2, the application date is October 15, 2004, and the invention title is "fluid level measuring equipment". technical field [0002] The present invention relates to an improved device for acoustically measuring the level of a fluid in a tank, comprising a transducer placed outside said fluid for transmitting and receiving acoustic signals, and connected to said transducer and extending to Waveguides in fluids. The invention also relates to a method of acoustically measuring the fluid level in a tank. Background technique [0003] Measuring devices and methods using acoustic signals are well known in the technical field. Acoustic measurements may, for example, be used to measure distance, depth, volume, flow velocity, or an acoustic property of the measured object, such as attenuation or the like. The propagation time of an aco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/296G01F
CPCG01F23/296
Inventor 简·博斯特伦
Owner AXSENSOR AB