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High-precision measurement method and system for multi-target displacement based on microwave radar

A technology of microwave radar and measurement system, applied in the field of radar

Inactive Publication Date: 2017-03-01
上海黎明瑞达电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] To sum up, the currently commonly used monitoring systems have their own problems. At present, there is no structural health monitoring system that can meet the requirements of all-weather, high precision and low cost at the same time.

Method used

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  • High-precision measurement method and system for multi-target displacement based on microwave radar
  • High-precision measurement method and system for multi-target displacement based on microwave radar
  • High-precision measurement method and system for multi-target displacement based on microwave radar

Examples

Experimental program
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Effect test

Embodiment 1

[0081] like figure 2 As shown, the signal transmitting unit includes a first sawtooth wave generator for generating a first sawtooth wave, a first voltage-controlled oscillator, a first power divider, a first mixer, a second power divider, and a The first single-frequency microwave source for generating the first single-frequency microwave signal, the first power amplifier and at least one transmitting antenna; the first single-frequency microwave signal generates the first signal 1 and the second signal 2 through the second power divider, and the second A sawtooth wave passes through the first voltage-controlled oscillator to generate the first frequency-modulated continuous wave, and the first frequency-modulated continuous wave passes through the first power divider to generate the fourth signal 4 and the fifth signal 5, and the fourth signal 4 and the first signal 1 pass through the second A mixer generates a third signal 3, and the third signal is amplified by the first ...

Embodiment 2

[0084] like image 3 As shown, the signal transmitting unit includes a second saw-tooth wave generator for generating a second saw-tooth wave, a second voltage-controlled oscillator, a fifth mixer, and a second single-frequency microwave signal for generating a second single-frequency microwave signal. frequency microwave source, a second power amplifier and at least one transmitting antenna, the second sawtooth wave is generated by a second voltage-controlled oscillator to generate a second frequency-modulated continuous wave, and the second frequency-modulated continuous wave and the second single-frequency microwave signal are mixed by a fifth The frequency mixer generates the thirteenth signal 13 after mixing, and the thirteenth signal 13 generates the fourteenth signal 14 and the fifteenth signal 15 after the coupler, and the fourteenth signal 14 is amplified by the first power amplifier Sent by the transmit antenna; the fifteenth signal 15 is input to the I / Q signal unit...

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PUM

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Abstract

The invention discloses a multi-target displacement high-accuracy measurement method and system based on microwave radar. The frequency measurement technology of frequency modulation continuous wave radar and the phase measurement technology of single-frequency continuous wave interferometer radar are fused together through the specific system structural design, and multi-target recognition and high-accuracy displacement measurement are achieved at the same time according to frequency estimation and phase measurement respectively. The FMCW radar and the CW radar are fused together, so that the advantage of multi-target recognition of the FMCW radar and the advantage of high-accuracy measurement of the CW radar are achieved at the same time; compared with FMCW / CW radar in a software configuration mode, mode switches are not needed for measurement, waveform modulation and other additional operation with special requirements are not needed, and multi-target displacement high-accuracy measurement can be finished in real time at the same time.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a method and system for measuring displacement of multiple targets with high precision based on microwave radar. Background technique [0002] Large-scale building structures, especially high-rise buildings, river-crossing bridges, urban overpasses, railway bridges, etc., are the infrastructure to ensure the normal operation of the society and people's normal life. The health monitoring of these building structures can regularly reflect their use status and provide Necessary fault warning information. Among the many monitoring parameters for structural health monitoring, the measurement of displacement can directly reflect the current load-bearing status of the structure and reflect the internal health status of the structure. At present, the displacement sensors widely used in structural health monitoring can be divided into two categories: contact type and non-contact type. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/32G01S7/35
CPCG01S7/35G01S13/32
Inventor 陈伟民李存龙刘显明雷小华
Owner 上海黎明瑞达电子科技有限公司
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