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Highway-lane dynamic positioning method based on audio

A dynamic positioning, highway technology, applied in the field of intelligent transportation, can solve the problem of not being able to dynamically locate lanes

Active Publication Date: 2016-10-05
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect that the current audio vehicle monitoring technology cannot dynamically locate the lane, and propose an audio-based highway lane dynamic positioning method, which can realize dynamic positioning of the lane according to the vehicle noise collected in real time

Method used

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  • Highway-lane dynamic positioning method based on audio
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  • Highway-lane dynamic positioning method based on audio

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Embodiment Construction

[0066] The basic principle of the present invention is to use beamforming (Beamforming) technology to construct vehicle detection areas at different positions. Due to the spatial filtering characteristics of beamforming, vehicle noise from outside the detection area will be suppressed by the beamforming algorithm, so it can be judged whether there is a vehicle in a certain detection area by accumulating the energy of the obtained signal. For highway vehicle monitoring, multiple vehicle detection areas with different shapes, sizes and positions can be constructed according to different monitoring purposes. The vehicle monitoring device is installed on the side of the road, the normal of the device points to the center of the road, and multiple fine-grained regions are constructed across the lane for lane positioning. The width of the fine-grained detection area is small, and the position is fixed. Multiple fine-grained detection areas are stacked end to end to form a detection ...

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Abstract

The invention provides a highway-lane dynamic positioning method based on an audio. The method comprises the following steps of step1) collecting vehicle noise signals by each array element of a microphone array; step2) processing the vehicle noise signals so as to acquire a correlation matrix C; step3) constructing a lane detection section and calculating an energy spectrum on the lane detection section according to the correlation matrix C; step4) calculating a foreground threshold alpha and a background threshold beta; step5) according to the foreground threshold alpha and the background threshold beta, carrying out normalization processing on the energy spectrum on the lane detection section and determining whether a vehicle enters into or leaves the lane detection section; and step6) calculating an azimuth angle of the vehicle entering into the lane detection section and calculating a lane position and a width. By using the highway-lane dynamic positioning method based on the audio, high resolution is possessed, and more lanes can be positioned under a same condition; and an overall amount of calculation of an algorithm is small and a requirement to hardware is low.

Description

technical field [0001] The invention belongs to the technical field of intelligent transportation, and in particular relates to an audio-based dynamic positioning method for road lanes. Background technique [0002] During the construction of a modern highway transportation system, a large number of vehicle monitoring devices are usually deployed along the road, so that the control center can monitor the traffic conditions on each road in real time, and plan traffic control measures according to different road conditions. As the "eyes" and "ears" of the control center, various vehicle monitoring sensors play an important role in intelligent transportation systems. Therefore, the development of more advanced, reliable and accurate monitoring equipment will help people make more reasonable traffic control decisions, thereby reducing road congestion, reducing transportation costs, and improving road traffic safety. [0003] According to different road environments and monitori...

Claims

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Application Information

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IPC IPC(8): G08G1/01
Inventor 纳跃跃付强国雁萌颜永红
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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