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System and method for processing echo signal of guided wave type radar level meter

A technology of radar level meter and echo signal, which is applied in the direction of engine lubrication, liquid/fluid solid measurement, instruments, etc. It can solve the problems of large measurement blind area, weak false echo suppression ability, and insufficient measurement accuracy, and achieve improvement The effect of measuring accuracy and reducing the measurement blind area

Active Publication Date: 2012-09-12
HEFEI UNIV OF TECH
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Problems solved by technology

[0013] In order to solve the problems of weak false echo suppression ability, insufficient measurement accuracy and large measurement blind area of ​​the existing level gauge, the present invention provides a method for processing the echo signal of the guided wave radar level gauge through the improvement of the existing technology. systems and methods

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  • System and method for processing echo signal of guided wave type radar level meter
  • System and method for processing echo signal of guided wave type radar level meter
  • System and method for processing echo signal of guided wave type radar level meter

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] The block diagram of the guided wave radar level meter system is as follows: figure 1 As shown, it is composed of single-chip microcomputer for controlling sending and receiving pulse signals, pulse transmitting circuit, probe, receiving echo signal circuit, equivalent time sampling circuit, signal conditioning circuit, MSP430F5418 single-chip microcomputer system, liquid crystal display and software. The single-chip microcomputer used to control the sending and receiving of pulse signals controls the transmission and reception of pulses; the transmitting pulse circuit transmits electromagnetic wave pulse signals to the probe, and the pulse signal propagates along the probe until it reaches the place where the relative permittivity of the air and the surface of the material changes suddenly. Reflection occurs; the reflected echo propagates upward along the probe...

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Abstract

The invention relates to the field of level measurement and provides a system for processing an echo signal of a guided wave type radar level meter taking a single chip as the core. The system is composed of the single chip for controlling the sending and receiving of a pulse signal, a pulse emission circuit, a guided wave rod, an echo signal receiving circuit, an equivalent time sampling circuit, a signal adjusting circuit, a MSP430F5418 single chip system, a liquid crystal display and software. Specific to the material with big relative dielectric constant and the material with small relative dielectric constant, different methods for processing the echo signal are respectively adopted for restraining false echo interference, confirming and correcting a peak value of a real echo, and then fitting or interpolating nominal data, thereby realizing the level measurement.

Description

technical field [0001] The invention relates to the field of material level detection, and is a guided wave radar level gauge, in particular a digital processing system for processing the echo signal of the guided wave radar level gauge with a single-chip microcomputer as the core. Background technique [0002] The material level is divided into liquid level, material level and phase interface position. The liquid level is defined as the height or surface position of the liquid stored in tanks, towers, tanks and other containers during the production process, as well as in natural rivers and reservoirs. The accumulation height or surface position of solid blocks, granules, powder, etc. stored in hoppers, tanks, yards, warehouses, etc. is defined as the material level. The liquid-liquid and liquid-solid interface positions are defined as the phase interface positions. Level is one of the four measurands in the process industry. For example, in the centralized transportatio...

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Application Information

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IPC IPC(8): G01F23/284
Inventor 徐科军叶旭魏萌方敏王沁侯其立张玉超马远
Owner HEFEI UNIV OF TECH
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