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High-precision Ship Measuring Radar and Speed ​​Measuring Method Based on Microwave Interferometer

A microwave interference, high-precision technology, used in radio wave measurement systems, radio wave reflection/re-radiation, instruments, etc., can solve the problems of large amount of signal processing data, existence of fence effect, long calculation time, etc. The effect of radar volume, low power consumption, and low speed measurement error

Active Publication Date: 2020-12-04
NANJING UNIV OF SCI & TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, two-dimensional FFT has a large amount of data for signal processing, complex calculation, long calculation time, and fence effect.

Method used

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  • High-precision Ship Measuring Radar and Speed ​​Measuring Method Based on Microwave Interferometer
  • High-precision Ship Measuring Radar and Speed ​​Measuring Method Based on Microwave Interferometer
  • High-precision Ship Measuring Radar and Speed ​​Measuring Method Based on Microwave Interferometer

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Experimental program
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Embodiment

[0044] In this embodiment, the working center frequency of the system is 24 GHz, the modulation bandwidth is 200 MHz, the modulation time is 0.1 ms, and the accumulation period is 128. In this embodiment, an FFT algorithm is used to obtain the initial phase of the target echo signal.

[0045] Using the phase difference to measure the unambiguous velocity of the target motion is In this simulation, 60 speeds belonging to the range of -30m / s to 30m / s are randomly generated to verify the correctness of the phase difference method to measure the speed. In this embodiment, only the phase difference of two modulation cycles is used to solve the motion speed. At the same time, the 2-D FFT algorithm is used to solve the moving speed of the target, and the calculation results of the two methods are compared and analyzed. The simulation results are shown in Figure 4.

[0046] It can be seen from FIG. 4 that in this embodiment, the measurement result using the velocity measurement meth...

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Abstract

The invention discloses a high-precision ship measuring radar based on a microwave interferometer, and a speed measuring method. The ship measuring radar comprises a radar signal processor, a radio frequency front-end device, a receiving antenna and a transmitting antenna, wherein a data output end of the receiving antenna is connected with a signal input end of the radio frequency front-end device, and a signal output end of the radio frequency front-end device is connected with a signal input end of the radar signal processor and a signal input end of the transmitting antenna. The ship measuring radar mainly aims at the field of port and gate ship measurement, adopts the combination of the radar signal processor, the radio frequency front-end device, the receiving antenna and the transmitting antenna, has higher speed measuring precision for slow-moving ships, and has a range finding function.

Description

technical field [0001] The invention belongs to the field of microwave and millimeter wave technology, in particular to a microwave interferometer-based high-precision ship-measuring radar and a speed-measuring method. Background technique [0002] With the rapid development of the intelligent transportation industry, microwave speed radar is widely used in traffic intelligent control systems such as speed measurement bayonet management, overspeed capture system and mobile electronic police, and has gradually become the core sensor of the intelligent traffic management system. [0003] Existing speed radars mostly use point-frequency continuous waves as their transmitting signals, and determine the vehicle's speed by analyzing the Doppler frequency of the echo signal. The outstanding advantages of continuous wave radar are that it has no distance blind zone and low average power; in addition, the principle of continuous wave radar ranging is simple, and the wavelength of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/58G01S13/92G01S7/03
CPCG01S7/03G01S13/583G01S13/92
Inventor 缪晨邱源李然屈斌郑卫力金锋吴文付健齐世山康炜
Owner NANJING UNIV OF SCI & TECH
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