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A Radar Level Meter for High Precision Measurement

A radar level meter, high-precision technology, applied in the direction of measuring devices, liquid/fluid solid measurement, engine lubrication, etc., can solve the problems of loss of measurement accuracy, difficulty in confirmation, high electromagnetic wave transmission rate, etc., to ensure high-precision level The effect of measuring and ensuring accuracy

Active Publication Date: 2018-03-20
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

The transmission rate of electromagnetic waves is high, and the time interval between transmitting pulses and receiving pulses is on the order of nanoseconds, which is difficult to confirm, resulting in loss of measurement accuracy

Method used

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  • A Radar Level Meter for High Precision Measurement
  • A Radar Level Meter for High Precision Measurement

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] Such as figure 1 Shown is a system block diagram of the present invention. The present invention uses analog circuits to complete the process of converting high-speed signals to low-speed by using repeated multi-cycles, that is, converting high-frequency and fast repetitive signals into low-frequency and slow signals; using feedback control to strictly control the local oscillator and adjustable The frequency difference of the local oscillator and the synchronous controller ensure the accuracy of equivalent time sampling, thereby ensuring high-precision level measurement. Compare the sampling data in the actual measurement process with the stored reference signal in the initial state of the empty tank, extract the transmission time from the top to the interface, and calculate the liquid level height according to the transmission time; ...

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Abstract

The invention relates to a radar level meter for high-precision measurement. Including, local oscillator, adjustable local oscillator, mixer, frequency divider, square wave shaper, transmit modulator, directional coupler, RF front end, guided wave antenna, analog-to-digital converter, microprocessor, synchronization controller and display devices; the application of analog circuits completes the process of converting high-speed signals to low-speed by using repeated multi-cycles, that is, converting high-frequency and fast repetitive signals into low-frequency and slow signals; using feedback control to strictly control the local oscillator and The frequency difference of the local oscillator can be adjusted, and the synchronous controller ensures the accuracy of equivalent time sampling, thereby ensuring high-precision level measurement.

Description

technical field [0001] The invention relates to the field of industrial measurement, in particular to a radar level gauge for high-precision measurement. Background technique [0002] The radar level gauge uses the echo measurement principle to measure the material level. When the emitted electromagnetic wave propagates to the material surface with different relative permittivity, it will reflect and be received by the antenna. The antenna is calculated by processing the received echo in the time domain or frequency domain. distance from the surface of the material. Due to the advantages of not being affected by medium density, medium viscosity, and medium vapor, electromagnetic waves are widely used in electric power, petrochemical, metallurgy, chemical and other fields, and are the fastest-growing level measurement technology in recent years. [0003] In order to ensure the accuracy of distance measurement, the guided wave radar level meter with time domain processing nee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/284
Inventor 高洁杜劲松王伟毕欣赵越南田星仝盼盼张青石李想徐洪庆丛日刚高扬
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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