Recognition device and method for radical driving state of driver

A technology of aggressive driving and recognition methods, applied in the field of driving behavior recognition, can solve the problems of low utilization rate of vehicle equipment, ignore the utilization of vehicle equipment resources, increase costs, etc., achieve good market promotion value, low device cost, and avoid waste Effect

Active Publication Date: 2016-03-30

JIANGSU UNIV

6 Cites 13 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] There are many detection contents, including drunk driving, speeding driving, fatigue driving, etc., which require more detection equipment and increase the cost;...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Abstract

The invention relates to a recognition device and method for the radical driving state of a driver. The recognition device comprises a data collecting unit, a processing unit and a voice prompt unit. The data collecting unit collects the image of a lane where a target car runs, the speed and the distances between the target car and front and back cars, transmits the collected target car information to the processing unit and obtains the lane deviation amount and speed of the target car, and the speeds of the front and back cars. In addition, the processing unit works out the radical driving degrees of the driver in the transverse and longitudinal directions through the processed information. When the radical driving degrees in the transverse and longitudinal directions are larger than a threshold value, the target car is in a radical driving state, and the driver is provided with early warning information through the voice prompt unit.

Application Domain

External condition input parameters

Technology Topic

Automotive engineeringEngineering +6

Image

Examples

Experimental program(1)

Example Embodiment

[0036] The device and method for identifying the aggressive driving state of the driver of the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0037] Such as figure 1 The diagram of the driver's aggressive driving state recognition device includes a data acquisition unit, a processing unit, and a voice prompt unit; the data acquisition unit includes a CCD camera, a vehicle-mounted CAN bus, and millimeter wave radar; the processing unit includes an image processing module, a storage module, and data Processing module; the voice prompt unit uses ISD1730 voice chip.

[0038] The CCD camera collects the lane image of the target vehicle and transmits it to the image processing module; the image processing module extracts the lane centerline position through preprocessing, boundary detection, Hough transformation, and feature extraction steps, and stores it in the The storage module; the data processing module reads the lane centerline position stored in the storage module, and combines the position of the target vehicle to obtain the lane offset δ y;

[0039] The vehicle-mounted CAN bus is read through the OBDII data interface on the vehicle, and the storage module is connected with the OBDII data interface to read the speed signal V of the vehicle-mounted CAN bus of the target vehicle. o , And stored in the storage module;

[0040] The millimeter-wave radar is installed at the front and rear of the target vehicle, and is used to obtain the distance between the target vehicle and the front and rear vehicles, and store the collected distance information in the storage module; the data processing module reads all The distance between the target vehicle and the front and rear vehicles stored in the storage module S f , S b , Get the speed V of the front and rear cars after processing f , V b;

[0041] The voice prompt unit is connected to the data processing module, and when the target vehicle is in an aggressive driving state, the voice prompt unit provides early warning information to the driver.

[0042] Such as figure 2 The method for identifying the driver's aggressive driving state includes the following steps:

[0043] Step 1. The processing unit is initialized. The CCD camera, on-board CAN bus, and millimeter wave radar in the data acquisition unit respectively collect the image of the centerline of the lane, the speed, and the distance to the front and rear vehicles of the target vehicle in 60s; and the acquired target vehicle information Sent to the processing unit;

[0044] Step 2: Obtain the lane offset δ of the target vehicle through the processing unit y , Speed V o , The distance between the front and rear cars S f , S b Speed V of the front and rear cars f , V b;

[0045] Step 3. The data processing module in the processing unit obtains the distance S between the target car and the front and rear cars. f , S b And threshold S d Judge the lane environment in which the target vehicle is traveling; the threshold S d By the safety distance formula Calculated; in the urban road traffic environment, the vehicle distance threshold S between the target vehicle and the front and rear vehicles d Is 35 meters; in the highway traffic environment, the distance between the target vehicle and the front and rear vehicles is the threshold S d Is 139 meters; according to the road threshold S d Divide the lane environment where the target vehicle is driving into four situations: there are vehicles in front and no vehicles behind; there are no vehicles in front and vehicles behind; there are vehicles in front and rear; and there are no vehicles in front and rear;

[0046] Step 4. Change the target lane offset δ obtained in step 2 y And threshold δ c Compare, if the lane offset δ y Greater than threshold δ c When the target vehicle is in a lane departure state, such as image 3 Shown is a schematic diagram of the target vehicle in a lane deviation state; threshold δ c Take 15% of the lane width L, the calculation formula is: δ c =0.15L, the lane line width L in the present invention is 3.6m; when the target vehicle is in a lane departure state, the ratio of the sum of the distance traveled by the target vehicle in the lane departure state to the length of the center line of the lane traveled by the target vehicle η represents the aggressiveness of the driver's lateral driving;

[0047] The formula for calculating the driver's aggressiveness η of lateral driving is:

[0048] Where L 1 , L 2...L k Is the longitudinal distance traveled by the target vehicle in a lane departure state in 60s, L m Is the length of the centerline of the lane where the target vehicle is traveling; Figure 4 Shown is the longitudinal distance road section diagram of the target vehicle in the lane departure state of the present invention.

[0049] When the aggressiveness of lateral driving η is greater than the threshold η c When the target vehicle is in an aggressive driving state, the voice prompt will provide the driver with warning information; otherwise, proceed to the next step;

[0050] Step 5. Change the target vehicle speed V obtained in step 2 o Maximum speed limit V u And minimum speed V d Comparison; in the urban road traffic environment, V u Take 60km/h, V d Take 0km/h; in the highway traffic environment, V u Take 120km/h, V d Take 80km/h; if the target vehicle speed is V o Greater than the maximum speed limit V u Or less than the minimum speed limit V d When the target vehicle is in an aggressive driving state, the voice prompt will provide the driver with warning information; otherwise, proceed to the next step;

[0051] Step 6. Change the target vehicle speed V in step 2 o And the obtained vehicle speed V f , V b Comparison, target vehicle speed V o Greater than the preceding vehicle speed V f Or less than the following vehicle speed V b When the time, the target vehicle is in an abnormal driving state; the ratio σ of the sum of the abnormal driving time period of the target vehicle to the total time period indicates the aggressiveness of the driver's longitudinal driving;

[0052] The formula for calculating the degree of aggressiveness σ of a driver's longitudinal driving is:

[0053] Where T 1 ,T 2 ,...,T k Is the time period when the target vehicle is driving abnormally, T m Is the sample time length 60s, such as Figure 5 Shown

[0054] If the aggressiveness σ of longitudinal driving is greater than the threshold σ c When the target vehicle is in an aggressive driving state, the voice prompt will provide the driver with warning information; otherwise, proceed to the next step;

[0055] Step 7. If the aggressiveness σ of longitudinal driving is not greater than the threshold σ c When the target vehicle is in a normal driving state.

[0056] The device and method for recognizing a driver's aggressive driving state provided by the present invention are described in detail above. This article uses specific examples to illustrate the principles and implementation of the present invention. It should be noted that the above is only The preferred embodiment of the present invention is only and is not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to view more

PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to view more

Classification and recommendation of technical efficacy words

Avoid wasting
Low installation cost

Recognition device and method for radical driving state of driver

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

Method and device for saving energy of household appliances

Molten method for preparing slag microcrystalline glass

Device and method for monitoring water purifier

Base Station and Method for Primary and Secondary Synchronization Signal Transmission in New Carriers

Video data management method and device, terminal and server

Classification and recommendation of technical efficacy words

Technique for fast activation of a secondary head-end node TE-LSP upon failure of a primary head-end node TE-LSP

Apparatus and method for sharing radio protocol entitles in wireless communication system

Method for sending hybrid automatic repeat request-acknowledgement character (HARQ-ACK) feedback information

Vehicle-road cooperative control system of signal lamp intersection

Method of Handling Resource Assignment and Related Communication Device

Deployable solar panel system

High-speed image acquisition and processing system

Method for directly carrying out innocent treatment on electrolytic manganese residues in filter pressing plate frames

Experimental apparatus for demonstrating movement rule of charged particle in uniform magnetic field

Cross-laminated wood processing equipment