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Multivariable guided wave radar probe

A multivariate, probe-based technology for measurement devices, radio wave measurement systems, liquid/fluid solids measurement, etc., which can solve problems such as limited accuracy and availability, and high cost

Active Publication Date: 2016-07-27
ROSEMOUNT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the placement of these sensors in the tank limits their accuracy and usability
This solution is also difficult and expensive to install as the sensor is external to the probe assembly requiring additional tank modifications

Method used

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Embodiment Construction

[0013] According to the techniques of the present disclosure, fluid level detection can be accomplished more accurately by integrating one or more sensors into a guided wave radar probe. In addition to sending single or multiple guided waves, detecting reflections of the waves, and calculating water level based on the wave detections, the one or more sensors sense additional parameters within the tank. These sensors provide additional parameters which, in combination with guided wave radar measurements, can provide more accurate and reliable measurements of water levels in tanks. Furthermore, integrating these additional sensors into the probe system reduces the cost of system build and installation as well as the cost of tank servicing.

[0014] figure 1 is a cross-sectional view showing an example of a multivariable level detection system (MLD) 10 for detecting the level FL of fluid within the tank 12 using multiple variables. The tank 12 contains: a first fluid L1, a seco...

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Abstract

A multivariable fluid level detection system comprising a guided wave radar probe with sensor or sensors integral to the probe for producing sensor signal(s), a transmitter for transmitting guided microwave pulses down the probe, a receiver for receiving reflected microwave pulses, and a processor for producing a measurement of fluid level based upon a time difference between transmission of a pulse and receipt of a reflected pulse and the sensor signal(s).

Description

technical field [0001] The present invention relates to guided wave radar measurements for detecting fluid levels in closed tanks. Background technique [0002] Guided wave radar tank probes are inserted into the tank from the top and immersed in the process fluid. The probe is then used to send guided electromagnetic waves into one or more fluids contained within the tank. Electromagnetic waves are sent by a transmitter through the probe. Reflection occurs when a wave encounters a fluid with a different dielectric constant. At this time, part of the energy will be reflected back in the form of reflected waves. The unreflected portion of the wave will continue through the fluid until it reaches another fluid with a different dielectric constant, the bottom of the tank, or the end of the probe. The receiver picks up all reflections. [0003] Reception occurs when the wave is reflected off the surface of the fluid in the tank. The speed of the wave and the strength of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/284
CPCG01S13/86G01S13/88G01F23/284
Inventor 罗伯特·C·海德克
Owner ROSEMOUNT INC