METHOD AND SYSTEM FOR DETECTING FREQUENT LANE CHANGES OF MOVING VEHICLES

• US 20160253900A1
• Filed: 07/18/2014
• Published: 09/01/2016
• Est. Priority Date: 03/14/2014
• Status: Active Grant

• Current Assignee: Streamax Technology Co., Ltd.
• Original Assignee: Streamax Technology Co., Ltd.
• Inventors: XIANG, Huaikun, SUN, Jiye
• Granted Patent: US 10,019,895 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60W 2420/905 the sensor being an xyz axis sensor
• CPC Class Codes: B60W 30/045 Improving turning performance
• CPC Class Codes: B60W 30/18163 Lane change; Overtaking manoeuvres
• CPC Class Codes: B60W 40/09 Driving style or behaviour
• CPC Class Codes: B60W 40/10 related to vehicle motion
• CPC Class Codes: G08G 1/0112 from the vehicle, e.g. floating car data [FCD]
• CPC Class Codes: G08G 1/0125 Traffic data processing
• CPC Class Codes: G08G 1/056 with provision for distinguishing direction of travel
• CPC Class Codes: G08G 1/167 Driving aids for lane monitoring, lane changing, e.g. blind spot detection

Abstract

The present invention belongs to the technical field of electronics, and provides a method and system for detecting frequent lane changes of moving vehicles. The method for detecting frequent lane changes of moving vehicles comprises following steps: extracting Z axis angular velocities, the Z axis angular velocities are those Z axis angular velocities in triaxial angular velocities obtained by a sensor of a vehicle in a moving process of the vehicle; if a Z axis angular velocity of which an adjacent numerical product is negative occurs in the Z axis angular velocities, storing the Z axis angular velocities in a specific time period; if the number of Z axis angular velocities with a numeral value of 0 in the specific time period reaches a first threshold value, judging that the vehicle has made frequent lane changes in the specific time period. By extracting the Z axis angular velocity values, and storing those Z axis angular velocities, from the Z axis angular velocity of which numerical product is negative, analyzing the Z axis angular velocities stored in the specific time period, and judging the number of the Z axis angular velocities with the numeral number of 0, it is determined whether the vehicle has made frequent lane changes or not in its moving process, so that an active monitoring for vehicle travelling statuses is implemented, thereby normalizing driving behaviors, and reducing traffic accidents.

Claims

1. A method for detecting frequent lane changes of moving vehicles, comprising following steps:

extracting Z axis angular velocities, the Z axis angular velocities are those Z axis angular velocities in triaxial angular velocities obtained by a sensor of a vehicle in a moving process of the vehicle;

if a Z axis angular velocity of which an adjacent product is negative occurs in the Z axis angular velocities, storing the Z axis angular velocities in a specific time period, the specific time period is a time interval between a time point when the Z axis angular velocity of which an adjacent product is negative occurs and a first time value after the time point when the Z axis angular velocity of which an adjacent product is negative occurs;

if the number of the Z axis angular velocities with a value of zero reaches a first threshold value in the specific time period, determining that the vehicle has made frequent lane changes in the moving process in the specific time period, wherein the first threshold value is a natural number that is more than 2.

2. The method according to claim 1, wherein before the step of storing the Z axis angular velocities in a specific time period if a Z axis angular velocity of which an adjacent numerical product is negative occurs in the Z axis angular velocities, the method further comprises:

adding N units of angular velocity values to the numerical value of each of the extracted Z axis angular velocities, wherein, N is a numerical value that is more than 0.

3. The method according to claim 1, wherein the condition that the number of the Z axis angular velocities equaling zero reaches a first threshold value in the specific time period comprises:

a time interval between two time points corresponding to adjacent Z axis angular velocities with a numeral value of zero reaches a second time value.

4. The method according to claim 1, wherein the condition that the number of the Z axis angular velocities equaling zero reaches a first threshold value in the specific time period further comprises:

an absolute value of a Z axis angular velocity corresponding to a third time value after a time point when a Z axis angular velocity with the numerical value of 0 occurs reaches a second threshold value.

7. The system according to claim 1, wherein the frequent lane changes judging module is further configured for judging that a time interval between two time points corresponding to adjacent Z axis angular velocities with a numeral value of zero reaches a second time value.

8. The system according to claim 1, wherein the frequent lane changes judging module is further configured for judging that an absolute value of a Z axis angular velocity corresponding to a third time value after a time point when the Z axis angular velocity with the numerical value of 0 occurs reaches a second threshold value.

5. A system for detecting frequent lane changes in moving vehicles, comprising:

a data extracting module configured for extracting Z axis angular velocities, the Z axis angular velocities are those Z axis angular velocities in triaxial angular velocities obtained by a sensor of a vehicle in a moving process of the vehicle;

a data storing module configured for storing Z axis angular velocities in a specified time period if a Z axis angular velocity of which an adjacent product is negative occurs in the Z axis angular velocities;

the specific time period is a time interval between a time point when the Z axis angular velocity of which an adjacent product is negative occurs and a first time value after the time point when the Z axis angular velocity of which an adjacent product is negative occurs; and

a frequent lane changes judging module configured for determining that the vehicle has made frequent lane changes in the moving process in the specific time period when the number of the Z axis angular velocities with an angular velocity value of 0 in the specific time period reaches a first threshold value, wherein the first threshold value is a natural number that is more than 2.

6. The system according to claim 5, wherein the system further comprises:

an amplitude adding module configured for adding N unit of angular velocity to the numerical value of each of the extracted Z axis angular velocities, wherein, N is a numerical value that is more than 0.