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Horizontal find using multiple search steps

A technology of level and level, applied in the field of level search using multiple search steps, which can solve problems such as transmission line impedance reduction

Active Publication Date: 2019-11-19
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This higher dielectric constant causes a decrease in the impedance of the transmission line, resulting in a pulse reflection (echo) signal back to the top of the detector

Method used

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  • Horizontal find using multiple search steps
  • Horizontal find using multiple search steps
  • Horizontal find using multiple search steps

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Embodiment Construction

[0014] The disclosed embodiments are described with reference to the accompanying drawings, wherein like reference numerals are used throughout to designate similar or equivalent elements. The drawings are not drawn to scale, and they are provided merely to illustrate certain disclosed aspects. Several disclosed aspects are described below with reference to example applications for illustration. It should be understood that numerous specific details, relationships, and methods are set forth to provide a thorough understanding of the disclosed embodiments.

[0015] One of ordinary skill in the relevant art will readily recognize, however, that the subject matter disclosed herein may be practiced without one or more of the specific details or with other methods. In other instances, well-known structures or operations have not been shown in detail to avoid obscuring certain aspects. The present disclosure is not limited by the illustrated order of acts or events, as some acts m...

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Abstract

A method of level finding includes providing characteristics of a shape of a transmitted pulse in time domain launched onto a waveguide into a tank having at least one material therein, physical properties of the waveguide and real and imaginary dielectric characteristics of the material at a frequency of the pulse. A level finding algorithm having a coarse search and a fine search is implemented, where the coarse search minimizes a prediction error between an echo signal (echo curve y(k)) and a sampled pulse model echo p(k) to obtain an objective function J(k) in a vicinity of a minimum prediction error (k*). The fine search calculates at least one minimum or maximum using J(k) in the vicinity of k*. The minimum or the maximum corresponds to a level of the material or an interface involving the material.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Provisional Application Serial No. 62 / 058,358, filed October 1, 2014, entitled "TIME DOMAIN REFLECTOMETRY (TDR) SIGNAL PROCESSING," which is incorporated herein by reference in its entirety. technical field [0003] The disclosed embodiments relate to level finding using time domain reflectometry (TDR) and level gauges and systems thereby. Background technique [0004] Level measurement techniques include ultrasound and radar, which is usually guided wave radar (GWR). Newer level measuring devices are TDR based which utilize sound or echo based measurements, either ultrasound or GWR. GWR is contact radar technology which uses the time TDR principle to measure the level of liquids or solids in tanks. [0005] GWRs work by generating a pulsed stream of electromagnetic energy and propagating the transmitted pulse down a transmission line formed in a level sensing probe. The detect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/284G01F23/296G01S7/292G01S7/527G01S13/88G01S15/88
CPCG01F23/284G01F23/296G01S7/292G01S7/4866G01S7/527G01S13/88G01S15/88
Inventor J.贝克斯特隆S.辛赫I.马克维奇S.萨瓦M.K.Y.休斯F.M.哈兰
Owner HONEYWELL INT INC