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Monitoring method, device and facility for abnormal road conditions based on millimeter-wave radar

A millimeter wave radar, road condition technology, applied in measurement devices, radio wave measurement systems, radio wave reflection/re-radiation and other directions, can solve the problems of algorithm accuracy, poor real-time performance, etc., to achieve fast response speed and real-time monitoring , the effect of eliminating instantaneous effects

Active Publication Date: 2019-07-26
厦门精益远达智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of using Doppler radar to calculate probabilities to warn possible abnormal situations needs to collect vehicle driving data first to construct a transition probability network, which has poor real-time performance. Strong dependence, small errors in data collection in the initial stage may have a fatal impact on the accuracy of algorithm judgments

Method used

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  • Monitoring method, device and facility for abnormal road conditions based on millimeter-wave radar
  • Monitoring method, device and facility for abnormal road conditions based on millimeter-wave radar

Examples

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no. 1 example

[0056] see figure 1 , the first embodiment of the present invention provides a method for monitoring abnormal road conditions based on millimeter-wave radar, which can be executed by millimeter-wave radar, in particular, executed by one or more processors in millimeter-wave radar, and at least Including the following steps:

[0057] S10, receiving the reflected signal of the monitoring area, and mixing the reflected signal with the local oscillator signal to obtain an intermediate frequency signal.

[0058] In this embodiment, a frequency-modulated continuous-wave millimeter-wave radar with one transmission and one reception is used, that is, one transmitting antenna and one receiving antenna. The radar is installed on a street light pole on one side of the road, and transmits a detection signal to the monitoring area through the transmitting antenna, which is called the transmitting signal here. The electromagnetic wave transmitted to the monitoring area will generate a refl...

no. 2 example

[0079] see figure 2 , the embodiment of the present invention also provides a monitoring device for abnormal road conditions based on millimeter-wave radar, including:

[0080] Receiving unit 10, is used for receiving the reflection signal of monitoring area, and described reflection signal and local oscillator signal are mixed to obtain intermediate frequency signal;

[0081] The distance spectrum acquisition unit 20 is used to carry out one-dimensional spectrum analysis to the intermediate frequency signal to obtain the distance spectrum;

[0082] A speed spectrum acquisition unit 30, configured to obtain a speed spectrum according to the distance spectrum and a preset distance amplitude threshold;

[0083] The target object set acquisition unit 40 is used to acquire the target object set in the predetermined motion state at the current sampling time in the monitoring area according to the speed spectrum, the preset speed amplitude threshold and the preset speed frequency ...

no. 3 example

[0100] The third embodiment of the present invention provides a method for monitoring abnormal road conditions based on millimeter-wave radar, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. The processing When the computer executes the computer program, the method for monitoring abnormal road conditions based on millimeter-wave radar as described in the above-mentioned embodiments is realized.

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Abstract

The invention provides a monitoring method, device and facility for abnormal road conditions based on a millimeter-wave radar. The monitoring method comprises the steps that a reflected signal of a monitoring area is received, and the reflected signal and a local oscillator signal are subjected to frequency mixing to obtain an intermediate frequency signal; the intermediate frequency signal is subjected to frequency spectrum analysis so as to obtain a distance spectrum; a speed spectrum is obtained according to the distance spectrum and the preset distance amplitude threshold; according to thespeed spectrum, the preset speed amplitude threshold and the preset speed frequency threshold, a set of target objects located at the predetermined motion state at the current sampling time in the monitoring area is obtained; according to the target objet set at the current sampling time and the target objet sets located at the previous N sampling times of the current sampling time, the durationof all the target objects, in the target objet set at the current sampling time, in the predetermined motion state is obtained; and according to the duration and the preset time threshold, abnormity of road conditions in the monitoring area is judged. The abnormal road conditions can be monitored, and the response speed is high.

Description

technical field [0001] The present invention relates to the technical field of intelligent transportation, in particular to a method, device and equipment for monitoring abnormal road conditions based on millimeter-wave radar. Background technique [0002] With the development of the times, the pace of economic construction has accelerated, the complexity of urban roads has increased, and the number of private cars and transport vehicles has also increased significantly. What follows is the frequent occurrence of various traffic incidents, which not only brings great inconvenience to people's daily life, but may even endanger people's personal safety. The focus of people's special concern and attention. [0003] Problems existing in the prior art: [0004] 1. Use the camera to monitor the abnormal situation of the road in real time through image acquisition and video processing. However, the method of using cameras to monitor road abnormalities is greatly affected by envi...

Claims

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Application Information

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IPC IPC(8): G08G1/01G01S13/91
CPCG01S13/91G08G1/01G08G1/0133
Inventor 张谅赵铁刚
Owner 厦门精益远达智能科技有限公司
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