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Millimeter wave radar speed measuring method

A millimeter-wave radar and speed measurement technology, which is applied in radio wave measurement systems, measurement devices, and radio wave reflection/re-radiation, etc. The effect of reducing the amount of calculation

Active Publication Date: 2019-10-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing sawtooth wave modulation technology in the millimeter wave radar system cannot accurately and quickly measure the target speed, the present invention proposes a millimeter Wave radar velocity measuring method, the technical scheme that the present invention adopts is:

Method used

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Embodiment 1

[0052] In the speed measurement process of vehicle-mounted radar, the method proposed by the present invention first performs one-dimensional FFT on the echo data, and then performs three judgments on the processed radar data, which are effective distance judgment, reasonable energy-distance dimension judgment and energy conformity judgment. Speed ​​judgment, and finally obtain the target distance and speed information. In this way, the need for two-dimensional FFT in the traditional sawtooth wave modulation method is eliminated, the purpose of reducing the calculation amount of the radar system is achieved, and the real-time performance of radar signal processing is effectively improved.

[0053] A millimeter-wave radar speed measurement method is realized through the following four steps:

[0054] Step S1: Preprocess the FFT data of the current millimeter-wave radar-chirp signal and the previous chirp signal respectively, and obtain the pre-processed data F c and F c-1 , t...

Embodiment 2

[0059] This embodiment is consistent with the millimeter-wave radar speed measurement method provided in Embodiment 1, and only the millimeter-wave radar speed measurement method provided in Embodiment 1 is further limited.

[0060] Such as Figure 1 to Figure 5 As shown, this embodiment discloses a millimeter-wave radar speed measurement method, which can use multi-period sawtooth wave frequency modulation continuous wave FMCW.

[0061] refer to figure 1 , figure 1 It is a schematic flow chart of a millimeter-wave radar speed measurement method provided by an embodiment of the present invention, which specifically includes the following steps:

[0062] Step S1: Preprocess the FFT data of the current chirp signal of the radar. For the processing process, refer to figure 2 , including the following steps:

[0063] Step S11: Form the FFT data of the current chirp signal into a vector is the frequency value of the first point after performing FFT on the current chirp sig...

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Abstract

The invention discloses a millimeter wave radar speed measuring method. The method comprises the following steps of carrying out one-dimensional FFT on echo data, and then carrying out three judgmentson the processed radar data, wherein the three judgments includes an effective distance judgment, a reasonable energy-distance dimension judgment, and an energy conformity judgment; and finally, acquiring a target distance and speed information. By using the millimeter wave radar speed measuring method, two-dimensional FFT required in a traditional sawtooth wave modulation mode is avoided, a purpose of reducing a calculation amount of a radar system is achieved, and real-time performance of radar signal processing is effectively increased.

Description

technical field [0001] The present invention relates to the application field of millimeter-wave radar, and more specifically, relates to a speed measurement method of millimeter-wave radar. Background technique [0002] With the continuous development of economy and technology in various countries, the number of private cars in various countries has increased rapidly, and the invention of wheeled vehicles has made a significant contribution to the development of mankind. However, the increase of vehicles also brings many disadvantages, especially brings huge traffic safety problems. For this reason, in view of automobile safety issues, automobile safety technology has been continuously improved, and the development of vehicles is more intelligent. Autonomous driving technology is playing an increasingly important role as a technology applied to vehicle safety. As a high-performance sensor used in autonomous driving technology, radar can work around the clock without being...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58
CPCG01S13/58G01S13/589
Inventor 刘震宇杨思远吴家彦陆蔚何源烽
Owner GUANGDONG UNIV OF TECH