CN103700160B - Carried on vehicle terminal and driving behavior determination methods based on microsensor - Google Patents
Carried on vehicle terminal and driving behavior determination methods based on microsensor Download PDFInfo
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Abstract
The present invention relates to the carried on vehicle terminal based on microsensor and driving behavior determination methods, this system mainly includes microsensor, global position system, OBD interface, wireless communication module, main storage, primary processor and system platform, monitored the driving behavior of vehicle driver by the real time position of collection vehicle, driving condition and vehicle-state, whether good pass judgment on its driving behavior by fixing determination methods simultaneously.And pass through to be wirelessly transferred to be sent to add up to system platform after driving terminates, finally draw driver's driving behavior analysis report of Current vehicle, service for the unit or individual that there is a need to this type of report.
Description
Technical field:
The present invention relates to the carried on vehicle terminal based on microsensor and driver's driving behavior determination methods.
Background technology:
Along with the increase year by year of public vehicles recoverable amount, vehicle driver is also increasing year by year, the circular according to the Ministry of Public Security's on January 30th, 2013: to the end of the year 2012, whole nation vehicle guaranteeding organic quantity has reached 2.4 hundred million, and vehicle driver quantity has reached 2.6 hundred million people.Automobile pollution 1.2 hundred million, increases by 15,100,000 year, increment more than 1999 the end of the year whole nation automobile pollution.18 big and medium-sized cities automobile pollutions are more than million.Motorist breaks through 200,000,000 people first, year increase by 26,470,000 people, increment more than 1997 the end of the year motorist total amount.
Being that the frequent of vehicle accident occurs with this thing followed, and bring mass casualties and property loss, the Claims Resolution expenditure also leading to insurance company ramps.Through the statistics of correlation study mechanism, the vehicle insurance Claims Resolution expenditure of insurance company grows beyond 15% in continuous 3 years, all exceedes automobile speedup.The mode that current insurance company controls Claims Resolution speedup is single, and being only the next year premium after settling a claim increases.This mode as punitive measures after accident occurs, can only can not play the effect of advance preventing and real-time reminding.
And the statistics and analysis according to National Automobile Association, the bad steering behavior of vehicle driver is the one of the main reasons that motor vehicles has an accident, including driving over the speed limit, frequent lane change, unexpected lane change, emergency brake and misoperation cause flame-out etc..If can cultivate and promote that vehicle driver forms good driving habits, it is beneficial to reduce the generation of vehicle accident, thus reduce casualties and property loss in source, and reduces insurance company's Claims Resolution expenditure.
Summary of the invention:
The invention aims to overcome above deficiency, it is provided that based on the carried on vehicle terminal of microsensor.
Another object of the present invention is to provide a kind of method that can monitor vehicle driver driving behavior in real time, is recorded and real-time reminding when there is bad steering behavior, ultimately forms vehicle driver driving behavior analysis form.
It is an object of the invention to be achieved through the following technical solutions:
A kind of driving behavior analysis system based on microsensor, microsensor, this device is for detecting the travel direction of vehicle, steering angle and transient acceleration data, and is sent to primary processor and processes；Global position system, this device is for judging position and the velocity information of vehicle.When primary processor monitors the travel direction of vehicle, steering angle and transient acceleration data generation exception, will be transferred this and tentatively judge.The OBD equipment of OBD interface, this interface and vehicle is attached, and obtains the underlying parameters such as car alarming, indicator, electromotor.When primary processor monitors the travel direction of vehicle, steering angle and transient acceleration data generation exception, will be transferred this and tentatively judge.Radio communication device, this device is for sending collect and driving behavior data of being correlated with after preliminary treatment to system platform；Main storage, for storing all data in driving process.Primary processor, whether the data for analyzing microsensor exceed preset value, and the data such as hybrid satellite location information, car alarming, indicator, electromotor tentatively judge when exceeding preset value.
A kind of driving behavior determination methods based on microsensor, monitor after the numerical value of microprocessor exceedes preset value including: primary processor, by to driving over the speed limit, the behavior such as flame-out that causes of frequent lane change, unexpected lane change, emergency brake and misoperation judges, and combine with satellite positioning information, finally draw the driving behavior whether standard of driver and good.
The present invention can monitor the driving habits of vehicle driver, is recorded when there is bad steering action and reports.Thus improving the bad steering custom of vehicle driver, cultivating good driving habits, the generation of less vehicle accident, thus reducing casualties and property loss, reducing the expenditure of insurance company's Claims Resolution cost further.
Accompanying drawing illustrates:
Fig. 1 is the system composition schematic diagram of the present invention.
Fig. 2 is the workflow diagram of the present invention.
Detailed description of the invention:
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment is only used for explaining the present invention, is not intended that limiting the scope of the present invention.
The driving behavior analysis system based on the microsensor of the present invention real-time status by real-time vehicle, cross the real time position of collection vehicle, driving condition and vehicle-state to monitor the driving behavior of vehicle driver, and judge that whether its driving behavior is good by certain method.Whole process is uniformly processed by primary processor, gather and monitor the data of OBD interface, microsensor and satellite positioning module, and transmission to main storage stores, after certain determination methods differentiates, the driving behavior of driver is divided into three class, it is respectively as follows: good, medium and poor, and is back to system platform in real time by wireless communication module, it is achieved judge and the analysis to vehicle driver driving behavior.
As Fig. 1 illustrates the structural representation of the driving behavior analysis system based on microsensor proposed by the invention, this system mainly includes microsensor, global position system, OBD interface, wireless communication module, main storage, primary processor and system platform.
Microsensor mainly has 2 kinds of equipment: gyroscope and acceleration transducer.Gyroscope adopts biaxial MEMS angular-rate sensor, it is possible to measure angular velocity both horizontally and vertically, is calculated the both horizontally and vertically angle change of vehicle in the unit interval by angular velocity formula；When the angle of horizontal direction changes, in conjunction with vehicle present speed, primary processor judge whether vehicle has carried out turning, lane change or the action turned around；When the angular velocity of vertical direction changes, in conjunction with vehicle present speed and angular velocity change frequency, primary processor judge whether vehicle is in descending or upward slope state.Acceleration transducer adopts piezoresistance type acceleration sensor, gathers the acceleration of rectilinear direction；All data that microsensor gathers are using as the initial Rule of judgment judging these the 2 kinds of motor vehicle driving behaviors of vehicle lane change, emergency brake.
Global position system adopts the Big Dipper/GPS dual-mode locating module, adopts big-dipper satellite alignment system in the normal and covered region of Big Dipper signal, and GPS is as a supplement；The longitude and latitude of main collection vehicle, speed, direction and elevation, as one of primary processor main subsidiary conditions judging motor vehicle driving behavior.OBD interface adopts OBD2 standard, it is possible to access the motor vehicles OBD socket of more than 90% brand, the data such as the ACC state of collection vehicle, engine speed, left and right directions lamp, brake signal, speed, seatbelt wearing situation.Engine speed is that motor vehicles stops working the initial Rule of judgment of this driving behavior.
Wireless communication module is for uploading in system platform when time behavior analysis result of driving.
Main storage is for all data in memory of driving process, including microsensor, global position system, the initial data of OBD interface transmission and the analysis result crossed through master processor processes.Primary processor be responsible for by microsensor, global position system, OBD interface collection data carry out Comprehensive Evaluation, the final result to driving behavior analysis.
Fig. 2 illustrates workflow and the analysis method of the vehicle driver driving behavior analysis system based on microsensor proposed by the invention.Following judge process, it is possible to by setup parameter, and formula, provide concrete decision process, can realize being as the criterion with those skilled in the art.
When after vehicle startup, the equipment on motor vehicles that is arranged on starts to start immediately, and gyroscope measures vehicle angular velocity both horizontally and vertically, and acceleration transducer measured by acceleration transducer, and in 10 seconds, the alarm condition of vehicle is detected, and recorded in main storage.
If vehicle travels when there being warning, will be recorded.
When vehicle enters in normal driving process, the data that microsensor, satellite positioning module and OBD interface can be transmitted by primary processor respectively are compared: after the angular velocity monitoring gyroscope persistently changes and terminates for 0.8 second, according to Formula for Angular Velocity of Fuze ω=Φ/t(ω, circular frequency, also angular velocity it is. Φ, angle, t, the time) draw the angle, φ that the direction of vehicle changes；In conjunction with the vehicle average overall travel speed v obtained from OBD interface, primary processor judge that the operation of vehicle is as follows:
1, speed is more than 15 kilometers and less than or equal to 40 kilometers, and Φ operates for turning around more than 120 degree；Φ is cornering operation less than 120 degree and more than 30 degree；Φ operates less than 30 degree and more than 5 degree for lane change.3 kinds of operations under this speed broadly fall into good driving behavior.
2, when speed is more than 40 kilometers and less than 90 kilometers, Φ turns around operation for danger more than 120 degree, and record score value is (Φ-120) * (v-40)/1000；Φ is dangerous cornering operation less than 120 degree and more than 75 degree, and record score value is (Φ-75) * (v-40)/1000；Φ is good cornering operation less than 75 degree and more than 30 degree；Φ is good lane change operation less than 30 degree and more than 5 degree.
3, when speed is more than 90 kilometers, turning around operation more than 120 degree for being in extreme danger or accident has occurred in vehicle, record score value is 2；Φ is dangerous cornering operation less than 120 degree and more than 75 degree, and record score value is 1.5；Φ is dangerous cornering operation less than 75 degree and more than 30 degree, and record score value is (Φ-30) * (v-90)/1000；When Φ is less than 30 degree and more than 5 degree, if direction changed time t less than or equal to 1 second, for good lane change operation；If direction changed time t more than 1 second, for dangerous lane change operation, record score value is 1；
Indicator when starting further according to this lane change in OBD interface opens situation, as do not opened, then and additional record score value 1 again.
Primary processor detects the data variation of acceleration transducer in real time.These acceleration transducer data are axial three acceleration signals of the XYZ tri-under three-dimensional coordinate, thus obtain along the axial accekeration Dx of XYZ tri-, Dy and Dz;Wherein Y-axis points to the direction that vehicle advances, and X-axis is pointed to vehicle forward direction and turned the direction after 270 degree along clockwise direction, and Z axis points to acceleration of gravity direction during vehicle horizontal level；Dx, Dy and Dz value to be timing be accelerates, Dx, Dy and Dz value for being slow down time negative；When Dx is more than 0.6g, too fast for accelerating, record score value is (Dx-0.6)；When Dx is less than-1G, too fast for slowing down, record score value is (1.1-(-Dx)).
When primary processor is when the OBD interface monitor of vehicle is to flame-out information, primary processor obtains velocity information at that time simultaneously from satellite positioning module.If speed >=5 kilometer/hour, it was shown that vehicle is flame-out under transport condition, record score value is 1；If speed < 5 kilometers/hour, it was shown that vehicle normally stops working.
When primary processor is when the OBD interface monitor of vehicle is to the information of ACCOFF, it was shown that this driving terminates.Calculated the duration of this driving by primary processor, and all score values of this driving behavior are added, be reported in system platform by wireless communication module.
Claims (5)
1. the vehicle driver driving behavior determination methods based on microsensor, it is characterized in that: its equipment mainly includes microsensor, global position system, OBD interface, main storage, primary processor and voice announcer, and each several part is connected with primary processor respectively；
Microsensor, comprises gyroscope and acceleration transducer, for detecting the travel direction of vehicle, steering angle and transient acceleration data, and is sent to primary processor and processes；
Global position system, is used for receiving BD2/GPS framing signal, and issues primary processor；
The OBD equipment of OBD interface, this interface and vehicle is attached, for transmitting each supplemental characteristic of vehicle alarm, indicator, electromotor；
Main storage, for storing the data that in driving process, microsensor transmits；
Primary processor, receives the data of microsensor, global position system and OBD interface, and sends voice broadcast instruction to voice announcer；
System platform, for receiving the data of primary processor；
The judge process of the method comprises the following steps:
Step 1, after vehicle launch, starts gather microsensor data and pass to primary processor；
Step 2, after primary processor receives data, will contrast with preset value, if it exceeds driving behavior will be judged and record in conjunction with satellite positioning information, indicator and engine information；
Step 3, record result is stored in main storage, waits that driving all behavior records terminating this driving is uploaded to system platform；
In step 2, the data that microsensor, satellite positioning module and OBD interface are transmitted by primary processor respectively are compared: after the angular velocity monitoring gyroscope persistently changes and terminates for 0.8 second, according to Formula for Angular Velocity of Fuze ω=Φ/t, wherein ω is circular frequency, is also angular velocity；Φ is angle；T, the time；Draw the angle, φ of the direction change of vehicle；In conjunction with the vehicle average overall travel speed v obtained from OBD interface, primary processor judge the operational circumstances of vehicle:
A, in 15km/h < v≤40km/h situation,
Work as Φ > 120 degrees second, for operation of turning around；
When 30 degrees second, < Φ is < during 120 degrees second, for cornering operation；
When 5 degrees second, < Φ < during 30 degrees second, operates for lane change；
3 kinds of operations under this speed belong to good driving behavior；
B, in 40km/h < v < 90km/h situation,
Work as Φ > 120 degrees second, turn around to operate for danger, record score value is (Φ-120) * (v-40)/1000；
When 75 degrees second, < < during 120 degrees second, for dangerous cornering operation, record score value is (Φ-75) * (v-40)/1000 to Φ；
When 5 degrees second, < Φ is < during 30 degrees second, for good lane change operation；
C, at v > in 90km/h situation,
As Φ > 120 degrees second time, turn around operation for being in extreme danger or accident occurred in vehicle, record score value is 2；
When 75 degrees second, < < during 120 degrees second, for dangerous cornering operation, record score value is 1.5 to Φ；
When 30 degrees second, < < during 75 degrees second, for dangerous cornering operation, record score value is (Φ-30) * (v-90)/1000 to Φ；
When 5 degrees second, < Φ is < during 30 degrees second, if direction changes time t≤1 second, for good lane change operation；If direction changes time t > 1 second, for dangerous lane change operation, record score value is 1；
In step 2,
Primary processor detects vehicle acceleration sensor in real time, and acceleration transducer data are axial three acceleration signals of the XYZ tri-under three-dimensional coordinate, thus obtains along the axial accekeration Dx of X, Y, Z tri-, Dy and Dz；Wherein Y-axis points to the direction that vehicle advances, and X-axis is pointed to vehicle forward direction and turned the direction after 270 degree along clockwise direction, and Z axis points to acceleration of gravity direction during vehicle horizontal level；Dx, Dy and Dz value to be timing be accelerates, Dx, Dy and Dz value for being slow down time negative；As Dx > 0.6g time, too fast for accelerating, record score value be (Dx-0.6)；As Dx <-1G, too fast for slowing down, record score value is (1.1-(-Dx)).
2. driving behavior determination methods according to claim 1, in step 1, the alarm condition of vehicle was detected by vehicle launch simultaneously in 10 seconds, and recorded in main storage；If vehicle travels when reporting to the police, corresponding score value will be recorded.
3. driving behavior determination methods according to claim 1, in step 2, simultaneously gathers indicator when this lane change starts according to OBD interface and opens situation, as do not opened, then and additional record score value 1 again.
4. driving behavior determination methods according to claim 1, also includes in step 2, and when primary processor is by OBD interface monitor to flame-out information, primary processor obtains velocity information at that time simultaneously from satellite positioning module；If speed >=5 kilometer/hour, it was shown that vehicle is flame-out under transport condition, record score value is 1；If speed < 5 kilometers/hour, it was shown that vehicle normally stops working.
5. the driving behavior determination methods according to claim 1,2,3 or 4, in step 3, when primary processor is by the information of OBD interface monitor to ACCOFF, it was shown that this driving terminates；Calculated the duration of this driving by primary processor, and all score values of this driving behavior are added, be reported in system platform by wireless communication module.
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