CN106627590A - Braking distance calculation method and device - Google Patents
Braking distance calculation method and device Download PDFInfo
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- CN106627590A CN106627590A CN201611165281.1A CN201611165281A CN106627590A CN 106627590 A CN106627590 A CN 106627590A CN 201611165281 A CN201611165281 A CN 201611165281A CN 106627590 A CN106627590 A CN 106627590A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
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Abstract
The invention discloses a braking distance calculation method. The braking distance calculation method comprises the following steps: acquiring related information of a current vehicle when the vehicle is positioned in a driving state, wherein the related information at least comprises own vehicle information and vehicle environment information; and calculating the braking distance of the current vehicle according to the related information and preset braking force. The invention also discloses a braking distance calculation device. According to the method and device disclosed by the invention, a driver can know the braking distance during vehicle driving in real time, so that the driver can keep a safe distance from a front vehicle according to the braking distance so as to drive safely.
Description
Technical field
The present invention relates to vehicle safe driving technical field, more particularly to braking distance computational methods and device.
Background technology
At present, there is a class major accident in vehicle traveling accident is exactly collision accident, study carefully its generation the reason for except
It is exactly that driver can not accurately judge the reason for also one extremely important outside the reasons such as system for distraction of driver, front truck emergency situations
The braking distance of this car, and then cause to be collided with front truck.
The braking distance of vehicle specifically refer to vehicle from brake to it is static when operating range, be generally all driver according to
Come what is estimated, such as driver is according to corresponding to the real-time speed of Current vehicle estimates current vehicle speed to experience
Braking distance, and then determine with the safe distance between vehicles of front truck to avoid colliding, but existing mode is excessively subjective and inaccurate, because
And be not particularly suited for some driving population, such as the driver within the practice phase.
The content of the invention
Present invention is primarily targeted at providing a kind of braking distance computational methods and device, it is intended in solving prior art
For the inaccurate technical problem of the estimation of braking distance.
For achieving the above object, the present invention provides a kind of braking distance computational methods, the braking distance computational methods bag
Include：
When vehicle is in transport condition, the relevant information of Current vehicle is obtained, the relevant information at least includes vehicle
Self information, vehicle environmental information；
According to the relevant information and preset braking strength, the braking distance of Current vehicle is calculated.
Preferably, the vehicle self information at least includes vehicle weight, travel speed；The vehicle environmental information is at least
Including Weather information, traffic information.
Preferably, it is described according to the relevant information and preset braking strength, calculate Current vehicle braking distance it
After include：
Travel speed and preset brake reaction time according to Current vehicle, calculates brake reaction distance；
According to the braking distance and the brake reaction distance, the safe distance between Current vehicle and front truck is calculated.
Preferably, the braking distance computational methods also include：
When vehicle is in transport condition and there is brake operation, the current braking strength of vehicle is also obtained；
According to the relevant information and current braking strength, the real-time braking distance of Current vehicle is calculated.
Preferably, it is described when vehicle is in transport condition and there is brake operation, also obtain the current brake weight of vehicle
Degree includes：
When vehicle is in transport condition and there is brake operation, the current braking strength and current vehicle of vehicle are also obtained
And the real-time range between objects ahead object；
It is described according to the relevant information and current braking strength, calculate and wrapped after the real-time braking distance of Current vehicle
Include：
Judge the described real-time braking distance of Current vehicle whether more than the real-time range；
If so, driver's increase braking strength is then pointed out.
Further, for achieving the above object, the present invention also provides a kind of braking distance computing device, the braking distance
Computing device includes：
Acquisition module, for when vehicle is in transport condition, obtaining the relevant information of Current vehicle, the relevant information
At least include vehicle self information, vehicle environmental information；
Computing module, for according to the relevant information and preset braking strength, calculating the braking distance of Current vehicle.
Preferably, the vehicle self information at least includes vehicle weight, travel speed；The vehicle environmental information is at least
Including Weather information, traffic information.
Preferably, the computing module is additionally operable to：
Travel speed and preset brake reaction time according to Current vehicle, calculates brake reaction distance；
According to the braking distance and the brake reaction distance, the safe distance between Current vehicle and front truck is calculated.
Preferably, the acquisition module is additionally operable to：When vehicle is in transport condition and there is brake operation, car is also obtained
Current braking strength；
The computing module is additionally operable to：According to the relevant information and current braking strength, the reality of Current vehicle is calculated
When braking distance.
Preferably, the acquisition module is additionally operable to：When vehicle is in transport condition and there is brake operation, car is also obtained
Current braking strength and the real-time range between Current vehicle and objects ahead object；
The braking distance computing device also includes：
Judge module, for judging the described real-time braking distance of Current vehicle whether more than the real-time range；
Reminding module, for when the described real-time braking distance of Current vehicle is more than the real-time range, pointing out to drive
Member's increase braking strength.
In the present invention, especially by the relevant information of collection vehicle, including vehicle self information, vehicle environmental information, than
Such as car weight, speed, fine day, expressway, while further synthesis driver tramples the braking strength of brake pedal, and based on phase
The mathematics calculation of pass and calculate the braking distance of Current vehicle, and then can make driver understand in real time vehicle travel when
Braking distance, and promote driver to be kept with front truck safe distance between vehicles to carry out safe driving according to the braking distance.
Description of the drawings
Fig. 1 is the schematic flow sheet of braking distance computational methods first embodiment of the present invention；
Fig. 2 is the schematic flow sheet of braking distance computational methods second embodiment of the present invention；
Fig. 3 is the application scenarios schematic diagram of the embodiment of braking distance computational methods one of the present invention；
Fig. 4 is the schematic flow sheet of braking distance computational methods 3rd embodiment of the present invention；
Fig. 5 is the application scenarios schematic diagram of another embodiment of braking distance computational methods of the present invention；
Fig. 6 is the schematic flow sheet of braking distance computational methods fourth embodiment of the present invention；
Fig. 7 is the high-level schematic functional block diagram of braking distance computing device first embodiment of the present invention；
Fig. 8 is the high-level schematic functional block diagram of braking distance computing device second embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
With reference to Fig. 1, Fig. 1 is the schematic flow sheet of braking distance computational methods first embodiment of the present invention.In the present embodiment,
Braking distance computational methods include：
Step S110, when vehicle is in transport condition, obtains the relevant information of Current vehicle, and relevant information at least includes
Vehicle self information, vehicle environmental information；
In the present embodiment, for judgment standard of the vehicle in transport condition is not limited, such as speed then thinks more than 5km/h
Vehicle is in transport condition.When vehicle is in transport condition, the relevant information of Current vehicle is obtained, wherein, for vehicle
The type of relevant information is not limited.
Optionally, vehicle self information at least includes vehicle weight, travel speed；Vehicle environmental information at least includes weather
Information, traffic information, such as rainy day, snowy day, highway, backroad etc..Wherein, different weather and road conditions will correspondences
Different coefficient of frictions, and then Different Effects can be produced to vehicle brake distance, such as under square one, rainy day, snowy day driving
Braking distance be greater than the braking distance of fine day driving, the braking distance of backroad be greater than the brake of highway away from
From.
Additionally, in the present embodiment, for the mode of the relevant information for obtaining vehicle is not limited.Such as, it is provided with vehicle each
Kind of monitoring sensor, such as velocity sensor, braking strength sensor, vehicle weight sensor, tyre pressure sensor, humidity sensor,
The data for monitoring are uploaded in real time onboard system by light sensor, temperature sensor etc., each sensor, and then can be passed through
OBD (On-Board Diagnostic, onboard diagnostic system) joint, or T-BOX devices (a kind of car networking intelligent terminal), directly
Connect or be connected with CAN lines indirectly, and then the various relevant informations of vehicle directly can be read from onboard system.Meanwhile, car
Relevant information can be obtained in real time, while can also periodically obtain.
Step S120, according to the relevant information and preset braking strength, calculates the braking distance of Current vehicle.
Generally, vehicle brake depends primarily on the frictional force between vehicle tyre and ground, and relevant with vehicle operation
Frictional force can substantially be divided into friction of rest power, force of rolling friction and force of sliding friction, such as vehicle is from inactive state to fortune
Dynamic state needs to overcome friction of rest power, and vehicle traveling needs to overcome force of rolling friction, and vehicle brake is then needed by cunning
Kinetic force of friction is slowed down.
In the present embodiment, braking strength specifically refers to the dynamics that driver tramples braking vane, theoretically, usual brake weight
Degree it is bigger, then brake disc is bigger to the active force of tire, so the force of sliding friction between tire and ground can be increased and to car
Traveling produces stopping power, and the more big then braking distance of stopping power is also just corresponding shorter.Meanwhile, for brake in the present embodiment
The measurement mode of dynamics is not limited, such as jam on force value by the pin of measurement driver and weighed, or is stepped on by measuring brake
The braking distance length of plate is weighed, or is weighed by measuring the stretching dynamics size of brake pedal association spring
Deng.
Additionally, with specific reference to the vehicle-related information for collecting and preset braking strength in the present embodiment, calculating current
The braking distance of vehicle, does not limit simultaneously for the calculation of the braking distance for calculating vehicle, such as certain in braking strength
In the case of, the empirical value mapping table between relevant information and braking distance is set, and then close further according to the empirical value mapping
It is estimation that table carries out braking distance.The Mathematical Modeling of braking distance can certainly be set up, and then according to the Mathematical Modeling
Calculate accurate braking distance.In view of under actual scene, the influence factor of braking distance length is relatively more, such as extraneous ring
Border, pressure of tire, vehicle load etc., it is therefore preferable that calculating braking distance by the way of empirical value estimation.
In addition need it is further noted that the length of vehicle brake distance mainly tramples the dynamics of braking vane with driver
Size is related, such as in the range of a certain braking strength, braking strength is bigger, then braking distance is shorter, but is not to say that maximum
The braking strength necessarily most short braking distance of correspondence, the brake weight angle value corresponding to most short braking distance is specifically in tire by rolling
Dynamic friction occurs when closing on sliding friction.But need it is further noted that generally larger braking strength also can be to this in-car
Driver and passenger produce dangerous, such as bring to a halt the larger inertia of generation and that passenger is thrown away into car is outer etc..Therefore, the present embodiment
Described in braking distance both can be theoretic theoretical minimum value, or meet this car driver and passenger and pacify by bus
The wish minimum of a value of full wish, depending on its size with specific reference to braking strength, therefore, for preset brake weight in the present embodiment
The setting of degree is not limited, and specifically can be configured based on experience value.
It is K to assume that driver tramples the maximum dynamics of braking vanemax, then default braking strength K can be set as 90%
Kmax, and then can ensure that driver and passenger's Ride safety in brake, at the same also reached optimal braking effect (
I.e. braking distance is relatively minimal).
In the present embodiment, the minimum safe distance of braking distance this car of correspondence and front truck, therefore, driver can be according to current
Corresponding braking distance is adjusting speed under traveling state of vehicle, so that Ben Che keeps safe distance between vehicles with front truck.
In the present embodiment, especially by the relevant information of collection vehicle, including vehicle self information, vehicle environmental information,
Such as car weight, speed, fine day, expressway etc., while further synthesis driver tramples the braking strength of brake pedal, and are based on
Related mathematics calculation and calculate the braking distance of Current vehicle, and then when driver can be made to understand vehicle in real time and travel
Braking distance, and promote driver to be kept with front truck safe distance between vehicles to carry out safe driving according to the braking distance.
With reference to Fig. 2, Fig. 2 is the schematic flow sheet of braking distance computational methods second embodiment of the present invention.In the present embodiment,
Also include after above-mentioned steps S120：
Step S130, the travel speed and preset brake reaction time according to Current vehicle calculates brake reaction distance；
Step S140, according to braking distance and brake reaction distance, calculates the safe distance between Current vehicle and front truck.
In the present embodiment, in the case where the current vehicle condition of this car is calculated after corresponding braking distance, to avoid occurring with front truck
Collision, also needs to further determine that the safe distance between Ben Che and front truck.Because braking distance is mainly trampled according to driver
The dynamics of brake pedal and calculate, therefore, before the safe distance between calculating and front truck, also need further to consider to drive
Corresponding vehicle operating range in the artificial reaction time that member is stepped on before brake, namely brake reaction distance.
In the present embodiment, the computing formula of brake reaction distance and safe distance is as follows：
Formula (1) brake reaction distance S1=VTravel speed*TReaction time；
Formula (2) safe distance S2=SBraking distance+S1；
In the present embodiment, the actual spacing of this car and front truck can be also further obtained, it is assumed that the actual car of Ben Che and front truck
Away from for S3, then only in S3＞ S2When, could really ensure the Travel vehicle between this car and front truck away from safety, if S3＜ S2, then may be used
To driver's early warning, driver is reminded to reduce speed or lane change, as shown in Figure 3.
In the present embodiment, based on calculated braking distance, and then can be easy to driver further adjustment and front truck it
Between safe distance between vehicles, lifted vehicle travel when security.
With reference to Fig. 4, Fig. 4 is the schematic flow sheet of braking distance computational methods 3rd embodiment of the present invention.Based on above-mentioned
One embodiment, in the present embodiment, braking distance computational methods also include：
Step S210, when vehicle is in transport condition and there is brake operation, also obtains the current braking strength of vehicle；
Step S220, according to relevant information and current braking strength, calculates the real-time braking distance of Current vehicle.
In the present embodiment, it is contemplated that driver not only needs to pay close attention to stopping under normal driving states in actually driving scene
Car distance, while also need to focus on real-time braking distance of the vehicle under braking state, therefore, in the present embodiment, further
When vehicle is in transport condition, monitoring vehicle whether there is brake operation, if existing, in the relevant information for obtaining vehicle
Meanwhile, also further obtain the current braking strength of vehicle, and the relevant information according to the vehicle for obtaining and acquisition is current
Braking strength, calculates the real-time braking distance of Current vehicle.
As shown in figure 5, detecting at the A of position brake operation in such as vehicle travel process, and detect at the B of position
Brake operation disappears, then start the current braking strength for further also obtaining vehicle at the A of position, until it reaches when at the B of position
Stop obtaining, meanwhile, in position, A-B is interval, calculates the real-time braking distance of vehicle.
In the present embodiment, it is contemplated that brake operation can produce impact to speed, and speed further can be to braking distance
Impact is produced, thus under braking state, driver is relatively difficult to hold real-time braking distance, and then it is not easy to driver
Accurate regulation speed and the safe distance between vehicles with front truck.
With reference to Fig. 6, Fig. 6 is the schematic flow sheet of braking distance computational methods fourth embodiment of the present invention.
Based on above-mentioned 3rd embodiment, in the present embodiment, above-mentioned steps S210 are specifically included：Transport condition is in vehicle
And when there is brake operation, also obtain real-time between the current braking strength and Current vehicle and objects ahead object of vehicle
Distance；Wherein, destination object both can be vehicle, such as car, lorry, motorcycle, bicycle etc., or pedestrian, animal,
Fixed obstacle etc..
Additionally, in the present embodiment, including after above-mentioned steps S220：
Whether step S230, judge the described real-time braking distance of Current vehicle more than the real-time range；
Step S240, if so, then points out driver's increase braking strength.
The present embodiment is applied particularly under the application scenario that driver tramples brake.Peace is monitored and controlled for ease of driver
Full spacing, therefore, in the present embodiment, after the real-time range of Current vehicle and real-time braking distance is calculated, can be further
Shown in real time by Vehicular screen, so that driver is referred to.
It should be noted that in the present embodiment, real-time range, real-time braking distance are all related to the travel speed of vehicle,
Therefore, if the travel speed real-time change of vehicle, real-time range, real-time braking distance also will accordingly occur real-time change.
In the present embodiment, when the real-time braking distance under current vehicle speed is more than the real-time range under current vehicle speed, point out
Driver increases the real-time braking distance under braking strength, and then quick shortening current vehicle speed and widens Ben Che and front mesh relatively
Real-time range between mark object, it is to avoid driver's erroneous judgement institute is caused the generation of traffic accident such as to knock into the back.
With reference to Fig. 7, Fig. 7 is the high-level schematic functional block diagram of braking distance computing device first embodiment of the present invention.This enforcement
In example, braking distance computing device includes：
Acquisition module 10, for when vehicle is in transport condition, obtaining the relevant information of Current vehicle, relevant information is extremely
Include vehicle self information, vehicle environmental information less；
In the present embodiment, for judgment standard of the vehicle in transport condition is not limited, such as speed then thinks more than 5km/h
Vehicle is in transport condition.When vehicle is in transport condition, the relevant information of Current vehicle is obtained, wherein, for vehicle
The type of relevant information is not limited.
Optionally, vehicle self information at least includes vehicle weight, travel speed；Vehicle environmental information at least includes weather
Information, traffic information, such as rainy day, snowy day, highway, backroad etc..Wherein, different weather and road conditions will correspondences
Different coefficient of frictions, and then Different Effects can be produced to vehicle brake distance, such as under square one, rainy day, snowy day driving
Braking distance be greater than the braking distance of fine day driving, the braking distance of backroad be greater than the brake of highway away from
From.
Additionally, in the present embodiment, for the mode of the relevant information for obtaining vehicle is not limited.Such as, it is provided with vehicle each
Kind of monitoring sensor, such as velocity sensor, braking strength sensor, vehicle weight sensor, tyre pressure sensor, humidity sensor,
The data for monitoring are uploaded in real time onboard system by light sensor, temperature sensor etc., each sensor, and then can be passed through
OBD (On-Board Diagnostic, onboard diagnostic system) joint, or T-BOX devices (a kind of car networking intelligent terminal), directly
Connect or be connected with CAN lines indirectly, and then the various relevant informations of vehicle directly can be read from onboard system.Meanwhile, car
Relevant information can be obtained in real time, while can also periodically obtain.
Computing module 20, for according to relevant information and preset braking strength, calculating the braking distance of Current vehicle.
Generally, vehicle brake depends primarily on the frictional force between vehicle tyre and ground, and relevant with vehicle operation
Frictional force can substantially be divided into friction of rest power, force of rolling friction and force of sliding friction, such as vehicle is from inactive state to fortune
Dynamic state needs to overcome friction of rest power, and vehicle traveling needs to overcome force of rolling friction, and vehicle brake is then needed by cunning
Kinetic force of friction is slowed down.
In the present embodiment, braking strength specifically refers to the dynamics that driver tramples braking vane, theoretically, usual brake weight
Degree it is bigger, then brake disc is bigger to the active force of tire, so the force of sliding friction between tire and ground can be increased and to car
Traveling produces stopping power, and the more big then braking distance of stopping power is also just corresponding shorter.Meanwhile, for brake in the present embodiment
The measurement mode of dynamics is not limited, such as jam on force value by the pin of measurement driver and weighed, or is stepped on by measuring brake
The braking distance length of plate is weighed, or is weighed by measuring the stretching dynamics size of brake pedal association spring
Deng.
Additionally, with specific reference to the vehicle-related information for collecting and preset braking strength in the present embodiment, calculating current
The braking distance of vehicle, does not limit simultaneously for the calculation of the braking distance for calculating vehicle, such as certain in braking strength
In the case of, the empirical value mapping table between relevant information and braking distance is set, and then close further according to the empirical value mapping
It is estimation that table carries out braking distance.The Mathematical Modeling of braking distance can certainly be set up, and then according to the Mathematical Modeling
Calculate accurate braking distance.In view of under actual scene, the influence factor of braking distance length is relatively more, such as extraneous ring
Border, pressure of tire, vehicle load etc., it is therefore preferable that calculating braking distance by the way of empirical value estimation.
In addition need it is further noted that the length of vehicle brake distance mainly tramples the dynamics of braking vane with driver
Size is related, such as in the range of a certain braking strength, braking strength is bigger, then braking distance is shorter, but is not to say that maximum
The braking strength necessarily most short braking distance of correspondence, the brake weight angle value corresponding to most short braking distance is specifically in tire by rolling
Dynamic friction occurs when closing on sliding friction.But need it is further noted that generally larger braking strength also can be to this in-car
Driver and passenger produce dangerous, such as bring to a halt the larger inertia of generation and that passenger is thrown away into car is outer etc..Therefore, the present embodiment
Described in braking distance both can be theoretic theoretical minimum value, or meet this car driver and passenger and pacify by bus
The wish minimum of a value of full wish, depending on its size with specific reference to braking strength, therefore, for preset brake weight in the present embodiment
The setting of degree is not limited, and specifically can be configured based on experience value.
It is K to assume that driver tramples the maximum dynamics of braking vanemax, then default braking strength K can be set as 90%
Kmax, and then can ensure that driver and passenger's Ride safety in brake, at the same also reached optimal braking effect (
I.e. braking distance is relatively minimal).
In the present embodiment, the minimum safe distance of braking distance this car of correspondence and front truck, therefore, driver can be according to current
Corresponding braking distance is adjusting speed under traveling state of vehicle, so that Ben Che keeps safe distance between vehicles with front truck.
In the present embodiment, especially by the relevant information of collection vehicle, including vehicle self information, vehicle environmental information,
Such as car weight, speed, fine day, expressway etc., while further synthesis driver tramples the braking strength of brake pedal, and are based on
Related mathematics calculation and calculate the braking distance of Current vehicle, and then when driver can be made to understand vehicle in real time and travel
Braking distance, and promote driver to be kept with front truck safe distance between vehicles to carry out safe driving according to the braking distance.
Further alternative, in the embodiment of braking distance computing device one of the present invention, computing module 20 is additionally operable to：
Travel speed and preset brake reaction time according to Current vehicle, calculates brake reaction distance；
According to braking distance and brake reaction distance, the safe distance between Current vehicle and front truck is calculated.
In the present embodiment, in the case where the current vehicle condition of this car is calculated after corresponding braking distance, to avoid occurring with front truck
Collision, also needs to further determine that the safe distance between Ben Che and front truck.Because braking distance is mainly trampled according to driver
The dynamics of brake pedal and calculate, therefore, before the safe distance between calculating and front truck, also need further to consider to drive
Corresponding vehicle operating range in the artificial reaction time that member is stepped on before brake, namely brake reaction distance.
In the present embodiment, the computing formula of brake reaction distance and safe distance is as follows：
Formula (1) brake reaction distance S1=VTravel speed*TReaction time；
Formula (2) safe distance S2=SBraking distance+S1；
In the present embodiment, the actual spacing of this car and front truck can be also further obtained, it is assumed that the actual car of Ben Che and front truck
Away from for S3, then only in S3＞ S2When, could really ensure the Travel vehicle between this car and front truck away from safety, if S3＜ S2, then may be used
To driver's early warning, driver is reminded to reduce speed or lane change, as shown in Figure 3.
In the present embodiment, based on calculated braking distance, and then can be easy to driver further adjustment and front truck it
Between safe distance between vehicles, lifted vehicle travel when security.
It is further alternative, it is to lift vehicle brake scene in another embodiment of braking distance computing device of the present invention
Under travel safety, in the present embodiment, acquisition module 10 is additionally operable to：Transport condition is in vehicle and there is brake operation
When, also obtain the current braking strength of vehicle；Computing module 20 is additionally operable to：According to relevant information and current braking strength, meter
Calculate the real-time braking distance of Current vehicle.
In the present embodiment, it is contemplated that driver not only needs to pay close attention to stopping under normal driving states in actually driving scene
Car distance, while also need to focus on real-time braking distance of the vehicle under braking state, therefore, in the present embodiment, further
When vehicle is in transport condition, monitoring vehicle whether there is brake operation, if existing, in the relevant information for obtaining vehicle
Meanwhile, also further obtain the current braking strength of vehicle, and the relevant information according to the vehicle for obtaining and acquisition is current
Braking strength, calculates the real-time braking distance of Current vehicle.
As shown in figure 5, detecting at the A of position brake operation in such as vehicle travel process, and detect at the B of position
Brake operation disappears, then start the current braking strength for further also obtaining vehicle at the A of position, until it reaches when at the B of position
Stop obtaining, meanwhile, in position, A-B is interval, calculates the real-time braking distance of vehicle.
In the present embodiment, it is contemplated that brake operation can produce impact to speed, and speed further can be to braking distance
Impact is produced, thus under braking state, driver is relatively difficult to hold real-time braking distance, and then it is not easy to driver
Accurate regulation speed and the safe distance between vehicles with front truck.
With reference to Fig. 8, Fig. 8 is the high-level schematic functional block diagram of braking distance computing device second embodiment of the present invention.This enforcement
In example, acquisition module 10 is additionally operable to：When vehicle is in transport condition and there is brake operation, also obtain vehicle works as front brake
Real-time range between dynamics and Current vehicle and objects ahead object；
Additionally, the travel safety in lift brake process, braking distance computing device includes：
Judge module 30, for judging the real-time braking distance of Current vehicle whether more than real-time range；
Reminding module 40, for when the real-time braking distance of Current vehicle is more than real-time range, pointing out driver increase
Braking strength.
The present embodiment is applied particularly under the application scenario that driver tramples brake.Peace is monitored and controlled for ease of driver
Full spacing, therefore, in the present embodiment, after the real-time range of Current vehicle and real-time braking distance is calculated, can be further
Shown in real time by Vehicular screen, so that driver is referred to.
It should be noted that in the present embodiment, real-time range, real-time braking distance are all related to the travel speed of vehicle,
Therefore, if the travel speed real-time change of vehicle, real-time range, real-time braking distance also will accordingly occur real-time change.
In the present embodiment, when the real-time braking distance under current vehicle speed is more than the real-time range under current vehicle speed, point out
Driver increases the real-time braking distance under braking strength, and then quick shortening current vehicle speed and widens Ben Che and front mesh relatively
Real-time range between mark object, it is to avoid driver's erroneous judgement institute is caused the generation of traffic accident such as to knock into the back.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of braking distance computational methods, it is characterised in that the braking distance computational methods include：
When vehicle is in transport condition, the relevant information of Current vehicle is obtained, the relevant information at least includes vehicle itself
Information, vehicle environmental information；
According to the relevant information and preset braking strength, the braking distance of Current vehicle is calculated.
2. braking distance computational methods as claimed in claim 1, it is characterised in that the vehicle self information at least includes car
Weight, travel speed；The vehicle environmental information at least includes Weather information, traffic information.
3. braking distance computational methods as claimed in claim 2, it is characterised in that described according to the relevant information and pre-
Braking strength is put, is included after the braking distance for calculating Current vehicle：
Travel speed and preset brake reaction time according to Current vehicle, calculates brake reaction distance；
According to the braking distance and the brake reaction distance, the safe distance between Current vehicle and front truck is calculated.
4. braking distance computational methods as claimed in claim 3, it is characterised in that the braking distance computational methods are also wrapped
Include：
When vehicle is in transport condition and there is brake operation, the current braking strength of vehicle is also obtained；
According to the relevant information and current braking strength, the real-time braking distance of Current vehicle is calculated.
5. braking distance computational methods as claimed in claim 4, it is characterised in that described vehicle is in transport condition and deposits
In brake operation, also obtaining the current braking strength of vehicle includes：
In vehicle in transport condition and when there is brake operation, also obtain the current braking strength and Current vehicle of vehicle with
Real-time range between objects ahead object；
It is described according to the relevant information and current braking strength, include after the real-time braking distance for calculating Current vehicle：
Judge the described real-time braking distance of Current vehicle whether more than the real-time range；
If so, driver's increase braking strength is then pointed out.
6. a kind of braking distance computing device, it is characterised in that the braking distance computing device includes：
Acquisition module, for when vehicle is in transport condition, obtaining the relevant information of Current vehicle, the relevant information is at least
Including vehicle self information, vehicle environmental information；
Computing module, for according to the relevant information and preset braking strength, calculating the braking distance of Current vehicle.
7. braking distance computing device as claimed in claim 6, it is characterised in that the vehicle self information at least includes car
Weight, travel speed；The vehicle environmental information at least includes Weather information, traffic information.
8. braking distance computing device as claimed in claim 7, it is characterised in that the computing module is additionally operable to：
Travel speed and preset brake reaction time according to Current vehicle, calculates brake reaction distance；
According to the braking distance and the brake reaction distance, the safe distance between Current vehicle and front truck is calculated.
9. braking distance computing device as claimed in claim 8, it is characterised in that
The acquisition module is additionally operable to：When vehicle is in transport condition and there is brake operation, currently stopping for vehicle is also obtained
Car dynamics；
The computing module is additionally operable to：According to the relevant information and current braking strength, stopping in real time for Current vehicle is calculated
Car distance.
10. braking distance computing device as claimed in claim 9, it is characterised in that the acquisition module is additionally operable to：In vehicle
In transport condition and when there is brake operation, the current braking strength and Current vehicle and objects ahead pair of vehicle is also obtained
Real-time range as between；
The braking distance computing device also includes：
Judge module, for judging the described real-time braking distance of Current vehicle whether more than the real-time range；
Reminding module, for when the described real-time braking distance of Current vehicle is more than the real-time range, pointing out driver to increase
Big braking strength.
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