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Method for measuring the level of a filling substance in a container

A technology for filling substances and material levels, which is applied in measuring devices, radio wave measuring systems, liquid/fluid solid measurements, etc. It can solve problems such as complex circuit systems and large evaluation of time-expanded envelope curves, so as to reduce power consumption, Effects of Omitting Numerical Data Processing

Active Publication Date: 2019-12-31
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of this method, however, is its complex circuitry, in which case, above all, the time extension and evaluation of the envelope curve is considerable

Method used

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  • Method for measuring the level of a filling substance in a container
  • Method for measuring the level of a filling substance in a container
  • Method for measuring the level of a filling substance in a container

Examples

Experimental program
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Embodiment Construction

[0050] Based on the block diagram showing the level measuring device of the present invention figure 1 , the operation of the method of the invention for measuring the level L of the filling substance 2 located in the container 1 will be explained below.

[0051] Position the level measuring device on the figure 1 At a predefined height I above the bottom of the container 1 in the illustration of . Via the level measuring device via the antenna unit 4 according to the repetition frequency f puls Microwave pulses are sent towards the filling substance 2 . Microwave pulses are excited via the pulse generation unit 3 and introduced via a duplexer into the antenna unit 4 in which they are radiated towards the filling substance 2 .

[0052] As is known from the prior art of pulse radars, the pulse generating unit 3 consists of two parts: a pulse generator 3a and a high-frequency generator 3b, which preferably has a low quality factor. In this case, the duration of the microwave...

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Abstract

The invention relates to a method for measuring fill level of a substance in a container. The method is based on pulse radar in which the repetition frequency of the microwave pulse is not constant but is controlled as a function of travel time. The repetition frequency increases as the travel time becomes shorter and lessens as the travel time becomes longer. The fill level is not based on the measured travel time, but is determined based on the resulting repetition frequency. The invention provides a pulse radar-based method for fill level measurement that can be implemented with reduced circuit complexity. This results from the fact that only the repetition frequency needs to be registered for fill level measurement. Neither a complex analog evaluating circuit nor a highly accurate time measurement are required. Complex digital data processing, such as the FMCW-based method required for fill level measurement, is absent.

Description

technical field [0001] The invention relates to a method for measuring the fill level of a filling substance in a container by means of microwave pulses, and to a fill-level measuring device suitable for carrying out this method. Background technique [0002] In automation technology, especially in process automation technology, field devices are often used for recording and / or influencing process variables. Field devices for recording process variables are sensors integrated in, for example, level measuring devices, flow measuring devices, pressure and temperature measuring devices, pH and redox potential measuring devices, conductivity measuring devices, etc., which record the corresponding Process variables, level, flow, pressure, temperature, pH, redox potential and conductivity. Field devices for influencing process variables are actuators, such as, for example, valves or pumps, via which the flow of a liquid in a pipe section or the fill level in a container can be ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/284
CPCG01F23/284G01S7/292G01S13/12G01S13/88
Inventor 托马斯·布洛特彼得·克勒费尔迈克·魏斯哈尔
Owner EHNDRESS KHAUZER GMBKH KO KG
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