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Frequency-modulated continuous-wave radar level gauge

A liquid level gauge and wave radar technology, which is applied in the field of linear frequency modulation continuous wave radar ranging, can solve the problems of rare high-precision intrinsically safe FMCW radar liquid level gauges, etc., to ensure signal measurement accuracy, light weight and small size Effect

Active Publication Date: 2016-06-15
无锡市雷华科技有限公司
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AI Technical Summary

Problems solved by technology

[0014] It can be seen from the public literature that high-precision FMCW radar level gauges are mainly monopolized by several foreign companies, and there are few high-precision intrinsically safe FMCW radar level gauges.

Method used

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  • Frequency-modulated continuous-wave radar level gauge

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Embodiment Construction

[0020] A high-precision FMCW radar level gauge is developed. The radar level gauge is mainly composed of a horn-shaped antenna, a transceiver unit, a circulator, a power module, a processing unit, and a display module.

[0021] The liquid level gauge adopts the chirp frequency modulated continuous wave (FMCW) radar system. The frequency synthesizer of the transceiver unit generates the FMCW signal of the Ku-band and up-converts it to the K-band to form a K-band signal with a power of not less than 5mW, which is radiated to the antenna unit through the circulator, and the echo signal is received by the antenna unit and sent by the circulator. To the receiving unit, the receiving unit performs harmonic mixing, band-pass filtering, and amplification on the echo signal, and outputs a difference frequency signal containing distance information, which is sampled by A / D to form a digital signal, and the processing unit receives the difference frequency digital signal of the transceive...

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Abstract

The invention belongs to the linear frequency-modulated continuous-wave radar range finding technology, relating to a frequency-modulated continuous-wave radar level gauge. The level gauge comprises an antenna module, a transmit-receive unit, a circulator, a power supply module, a processing unit and a display unit. An FMCW signal generated by a frequency synthesizer of the transmit-receive unit is subjected to frequency conversion to obtain K wave band to form a K wave-band signal with power no less than 5mw. The K wave-band signal is outwardly radiated to the antenna module via the circulator. An echo signal is conveyed to the transmit-receive unit when the antenna module receives the circulator. The transmit-receive unit is used for performing harmonic mixing operation and band-pass filtering operation and amplifying the echo signal to output a difference frequency signal containing distance information and forms a digital signal by A / D sampling. The processing unit is used for reconvening the difference frequency signal of the transmit-receive unit to carry out FFT treatment, clutter rejection, target detection and spectrum estimation in order to obtain liquid level data. The technical scheme helps to improve precision of liquid level detection.

Description

technical field [0001] The invention belongs to the linear frequency modulation continuous wave radar ranging technology, and relates to a linear frequency modulation continuous wave radar liquid level gauge. Background technique [0002] The radar liquid level gauge is one of the demonstration projects of the Internet of Things. The main task of this project is to realize the intelligent management of the military oil depot through the intelligent perception, interconnection and information synthesis of the information of the military oil depot, and effectively improve the comprehensive support level of the military . [0003] The sensing layer of the oil storage tank in the oil depot is composed of temperature, pressure, flow, liquid level and other information sensors. The radar level gauge is a non-contact measuring device for the oil volume of the oil storage tank. It uses the transmission-reflection-reception working mode to detect the liquid level height , has the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/284
Inventor 谢金华王福友聂翀
Owner 无锡市雷华科技有限公司
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