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Automobile running speed detection method based on smart phone audio perception

A technology of driving speed and smart phones, applied in the direction of neural learning methods, measuring devices, computer components, etc., can solve the problems of high cost and weak anti-interference, and achieve low cost, strong anti-interference, and not easy to interfere Effect

Pending Publication Date: 2021-01-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the current technical problem of high cost or low anti-interference in monitoring vehicle speed in the driving environment, and creatively propose a method for detecting vehicle speed using audio sensors in pedestrian smart phones

Method used

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  • Automobile running speed detection method based on smart phone audio perception
  • Automobile running speed detection method based on smart phone audio perception
  • Automobile running speed detection method based on smart phone audio perception

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Experimental program
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Embodiment

[0055] In order to test the performance of this method, this method is written as an Android application and deployed in different models of Android phones. And recruited 6 volunteers, 3 as drivers driving different vehicles, 3 as pedestrians carrying mobile phones for testing. In order to ensure safety, an open and empty road was chosen as the experimental site.

[0056] First, test the overall error of the method in various cases. figure 2 Cumulative distribution functions of speed detection errors for electric vehicles, gasoline vehicles, and overall are shown. It can be seen from the figure that the speed detection error of 90% of electric vehicles is less than 2.9km / h; the speed detection error of 90% of gasoline vehicles is less than 2.4km / h; 90% of the overall detection error is less than 2.7km / h, which fully illustrates This method has smaller error and higher accuracy.

[0057] Then, test the accuracy of the electric vehicle speed interval classifier. image 3 Th...

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Abstract

The invention discloses an automobile running speed detection method based on smart phone audio perception. According to the method, a microphone of a smart phone is used for collecting sound signalsgenerated when an automobile runs, and the speed interval to which the automobile speed belongs is determined by analyzing the characteristics of the sound signals; meanwhile, a simple sonar system isformed by a loudspeaker and a microphone of the smart phone, and the speed of moving objects around pedestrians is obtained by analyzing high-frequency sound signals which are collected by the microphone, emitted by the loudspeaker and reflected by the moving objects. Finally, the speed of the automobile passing through the user is detected by combining the two results. According to the invention, high-frequency sound which cannot be perceived by human ears is emitted only by means of the loudspeaker in the smart phone, the microphone receives sound signals, the deployment cost is low, the anti-interference performance is strong, the privacy leakage problem does not exist, and the method is especially suitable for detection environments where vehicles sequentially pass and vehicles and pedestrians are close to each other, and has very high accuracy.

Description

technical field [0001] The invention relates to a vehicle speed detection method, in particular to a vehicle speed detection method based on the audio perception capability of a smart phone audio sensor, that is, a speaker and a microphone, which is used to monitor whether a driver is driving over speed, and belongs to the technical field of mobile computing applications. Background technique [0002] In recent years, with the continuous increase in the number of cars, especially the explosive growth of the number of household cars in cities, modern transportation has brought more convenience to human life, but it has also brought more traffic accidents. Speeding is a common driving behavior, but its potential harm is ignored by many drivers. Studies have shown that in the past few decades, about one-third of traffic accidents have something to do with speeding. At present, transportation departments and government agencies mainly control the problem by installing radar spe...

Claims

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Application Information

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IPC IPC(8): G01S11/14G06K9/00G06N3/04G06N3/08
CPCG01S11/14G06N3/049G06N3/084G06N3/045G06F2218/08G06F2218/12
Inventor 李凡吴玥解亚东杨松
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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