Intelligent brake control systemTechnical field
The invention belongs to pilotless automobile field, more particularly to a kind of Intelligent brake control system.
Background technology
How the situation of braking is intelligently recognized the need in complex environment, and safely and effectively braked, beThe important topic in unmanned field.It is focused primarily upon at present for the research for controlling vehicle braking by outside vehicle and traffic is believedThe identification of signal lamp, for example, the patented product traffic lights of Chang An University self-adapting system of automobile (referenced patent documentCN202847675U), the patented product of Zhejiang Jili Holding Group Co., Ltd prevents the control device (reference of running red light for vehiclePatent document CN102881180B).
Invention content
The present invention provides a kind of Intelligent brake control systems, can intelligently identify driving vehicle externalitiesThe factor of driving safety, and the startup or operation of the brake apparatus of vehicle are operated by these external factor, with raising, nobody drivesThe driving safety sailed.
Intelligent braking system includes：
GPS positioning instrument：Real time position for obtaining pilotless automobile and neighbouring vehicle flowrate, and according to position, purposeGround and neighbouring information of vehicle flowrate are that pilotless automobile plans travel paths；
Velocity sensor：The travel speed current for obtaining automobile；
Digital communication chip：It is indicated between vehicle-mounted computer and radio base station apart from size and radio communication for obtainingThe RSSI value of signal strength；
Vehicle-mounted computer：Real-time radio electricity communication is carried out with radio base station, is signally attached to digital communication chip, GPSPosition indicator and velocity sensor；
Vehicle-mounted computer is configured as obtaining RSSI value, when radio communication signal intensity is less than the first standard value, by vapourVehicle is dimensioned to the first distance value at a distance from first base station, carries out the switching of radio signal connection, concrete operations at this timeIt is as follows：
(1) when being more than the first distance value at a distance from automobile is between first base station, vehicle-mounted computer and first base station are disconnectedRadio signal connects, while vehicle-mounted computer sends out GPS positioning instrument and plans trip order again；
(2) obtain the position of the second base station checked in by the radio base station sites database configured in vehicle-mounted computer withNeighbouring information of vehicle flowrate, under the premise of destination is constant, GPS positioning instrument is by the stroke planning of pilotless automobile with secondOn the shortest path of base station stroke, preferential planning meets and vehicle flowrate most short with the second base station stroke and is less than first flow at the same timeOn the path of value；
(3) the current travel speed of the pilotless automobile measured by velocity sensor is obtained；
(4) when travel speed is more than First Speed value, vehicle-mounted computer controls the distributive value of engine electric spray system, limitationPilotless automobile accelerates, while control brake makes pilotless automobile be decelerated to First Speed and the traveling that remains a constant speed；WhenWhen travel speed is less than First Speed value, vehicle-mounted computer controls the distributive value of engine injector system, limits pilotless automobileAccelerate, while controlling brake monitor makes pilotless automobile remain a constant speed traveling；
(5) when being less than the first distance value at a distance from the second base station when automobile, vehicle-mounted computer establishes the nothing with the second base stationLine electric signal connects；
First standard value refers to：Communication delay between vehicle-mounted computer and server is equal to the nothing in the case of first timeLine electricity communication signal intensity；
First base station refers to：The base station that radio signal is connect currently is established with vehicle-mounted computer；
Second base station refers to：Between first base station and automobile destination, with first base station apart from nearest base station.
The beneficial effects of the invention are as follows：The digital communication chip for measuring RSSI value is added, when vehicle-mounted computer and first base stationBetween radio communication signal connection exist influence ride safety of automobile risk when disconnect at once, carry out to the second base stationClose to the safety operation of traveling, realize that the safety of radio signal connection of the vehicle-mounted computer between first base station and the second base station is cutIt changes.By radio communication signal intensity, this external factor that can influence pilotless automobile travel safety is supervised in real timeControl realizes the implementation for controlling safety operation by this external factor, improves intelligence and the pilotless automobile of brake apparatusThe safety of traveling.
Description of the drawings
Fig. 1 shows the control flow chart of intelligent brake controller；
Fig. 2 shows the composition schematic diagrams of intelligent brake controller.
Specific implementation mode
With reference to the accompanying drawings, the function that the structure of this system is described in detail and is realized.
GPS positioning instrument 1：Real time position for obtaining pilotless automobile and neighbouring vehicle flowrate, and according to position, purposeGround and neighbouring information of vehicle flowrate are that pilotless automobile plans travel paths；
Velocity sensor 2：The travel speed current for obtaining automobile；
Digital communication chip 3：Indicate logical apart from size and radio between vehicle-mounted computer and radio base station for obtainingInterrogate the RSSI value of signal strength；
Vehicle-mounted computer 4：Real-time radio electricity communication is carried out with radio base station, is signally attached to digital communication chip, GPSPosition indicator and velocity sensor；
Vehicle-mounted computer is configured as obtaining RSSI value, when radio communication signal intensity is less than the first standard value, by vapourVehicle is dimensioned to the first distance value at a distance from first base station, carries out the switching of radio signal connection, concrete operations at this timeIt is as follows：
(1) when being more than the first distance value at a distance from automobile is between first base station, vehicle-mounted computer 4 and first base station are disconnectedRadio signal connects, while vehicle-mounted computer 4 sends out GPS positioning instrument and plans trip order again；
(2) obtain the position of the second base station checked in by the radio base station sites database configured in vehicle-mounted computer withNeighbouring information of vehicle flowrate, under the premise of destination is constant, GPS positioning instrument 1 is by the stroke planning of pilotless automobile withOn the two shortest paths of base station stroke, preferential planning meets and vehicle flowrate most short with the second base station stroke less than first-class at the same timeOn the path of magnitude；
(3) the current travel speed of the pilotless automobile measured by velocity sensor is obtained；
(4) when travel speed is more than First Speed value, vehicle-mounted computer 4 controls the distributive value of engine electric spray system, limitPilotless automobile processed accelerates, while control brake makes pilotless automobile be decelerated to First Speed and the traveling that remains a constant speed；When travel speed is less than First Speed value, vehicle-mounted computer 4 controls the distributive value of engine injector system, limits unmanned vapourVehicle accelerates, while controlling brake monitor makes pilotless automobile remain a constant speed traveling；
(5) when being less than the first distance value at a distance from the second base station when automobile, vehicle-mounted computer 4 establishes the nothing with the second base stationLine electric signal connects.
One skilled in the art would recognize that without departing substantially from the spirit and scope of the invention as describing in general manner,Various variations and/or modification can be carried out to invention shown in each specific embodiment.Therefore, in terms of allFor, embodiment here is considered as illustrative and and non-limiting.Equally, the present invention includes any featureCombination, the combination of any feature especially in Patent right requirement, even if the combination of this feature or feature is not in patentIt is explicitely stated in claim or each embodiment here.