CN108281042A - A kind of rear-end collision prevention early warning system and method based on geomagnetism detecting - Google Patents
A kind of rear-end collision prevention early warning system and method based on geomagnetism detecting Download PDFInfo
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- CN108281042A CN108281042A CN201810220631.2A CN201810220631A CN108281042A CN 108281042 A CN108281042 A CN 108281042A CN 201810220631 A CN201810220631 A CN 201810220631A CN 108281042 A CN108281042 A CN 108281042A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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Abstract
The present invention relates to a kind of rear-end collision prevention early warning system and method based on geomagnetism detecting, the present invention includes a kind of rear-end collision prevention early warning system based on geomagnetism detecting.The preceding vehicle speed of acquisition, rear vehicle speed, front truck moment and rear car moment are transmitted separately to geomagnetism detecting device wireless communication module by geomagnetism detecting device；First geomagnetism detecting device wireless communication module carries out data transmission preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment respectively；Controller calculates separately safe distance and vehicle distances according to preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment, and passes through safe distance and and vehicle distances analysis vehicle-state；Vehicle-state transmission variable information traffic signboard is carried out car alarming by controller.Compared with prior art, the present invention plays significant warning function to small-pitch vehicle, can effectively realize draw a hand-cart away from purpose, reduce the generation of rear-end collision, ensure traffic safety.
Description
Technical field
The present invention relates to intelligent transport technology more particularly to a kind of rear-end collision prevention early warning systems and side based on geomagnetism detecting
Method.
Background technology
With the growth year by year of China's vehicle guaranteeding organic quantity, urban highway traffic pressure increases, and land used resource is nervous.Traffic
On the one hand the generation of accident seriously threatens the life security of people, on the other hand also easily form the bottle of road passage capability
Neck.In traffic accident form, rear-end collision is the common generation form of one of which.And it is most basic to cause rear-end collision to occur
Reason is that vehicle spacing is too small, when emergency occurs, rear car driver can not be braked in time in existing distance and with
The front truck tailstock collides.Therefore, vehicle spacing is widened by effective early warning system, it is very to prevent rear-end collision
It is necessary.
Currently, the research direction of rear-end collision prevention early warning system is mostly focused on the rangings such as millimetre-wave radar or laser radar biography
The use of sensor, such sensor are installed in fixed vehicle, can only realize single distance measurement function, in existing vehicle population
It can not be widely used under more overall background.Therefore, in terms of the generation for preventing rear-end collision there is an urgent need for a kind of new early warning system,
Also it can be widely used in the case that vehicle guaranteeding organic quantity is higher.By this early warning system realize draw a hand-cart away from purpose, have
Effect prevents rear-end collision, ensures traffic safety.
Invention content
In order to solve the above technical problems, the present invention provides a kind of rear-end collision prevention early warning system based on geomagnetism detecting and
Method.
Technical solution is used by the system of the present invention：A kind of rear-end collision prevention early warning system based on geomagnetism detecting, it is special
Sign is, including：First geomagnetism detecting device is to the last one geomagnetism detecting device (D1-DN), the first geomagnetism detecting device radio communication mold
Block is to the last one geomagnetism detecting device wireless communication module (T1-TN), the first controller wireless communication module to the last one control
Device wireless communication module (M1-MN), the first controller to the last one controller (1-N), the first variable information traffic signboard extremely
The last one variable information traffic signboard (VMS1-VMSN)；
First geomagnetism detecting device is to the last one geomagnetism detecting device (D1-DN) and first geomagnetism detecting device
Wireless communication module is to the last one geomagnetism detecting device wireless communication module (T1-TN) be sequentially connected respectively by conducting wire；Described
First geomagnetism detecting device wireless communication module is to the last one geomagnetism detecting device wireless communication module (T1-TN) and described first
Controller wireless communication module is to the last one controller wireless communication module (M1-MN) mode is successively by radio communication respectively
It is wirelessly connected；The first controller wireless communication module is to the last one controller wireless communication module (M1-MN) with it is described
The first controller to the last one controller (1-N) be sequentially connected respectively by conducting wire；First controller is to last
One controller (1-N) and the first variable information traffic signboard to the last one variable information traffic signboard
(VMS1-VMSN) be sequentially connected respectively by conducting wire.
Technical solution is used by the method for the present invention：A kind of anti-method for early warning that knocks into the back based on geomagnetism detecting, it is special
Sign is, includes the following steps：
Step 1：First geomagnetism detecting device is to the last one geomagnetism detecting device (D1-DN) by the preceding vehicle speed of acquisition, rear speed
Degree, front truck moment and rear car moment are transmitted separately to the first geomagnetism detecting device wireless communication module to the last one geomagnetism detecting
Device wireless communication module (T1-TN)；
Step 2：First geomagnetism detecting device wireless communication module is to the last one geomagnetism detecting device wireless communication module (T1-
TN) carry out data transmission preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment respectively；
Step 3：First controller to the last one controller (1-N) according to preceding vehicle speed, rear vehicle speed, front truck moment with
And the rear car moment calculates separately safe distance and vehicle distances, and pass through safe distance and and vehicle distances analysis vehicle shape
State；
Step 4：Vehicle-state is transmitted separately to the first variable information by the first controller to the last one controller (1-N)
Traffic signboard is to the last one variable information traffic signboard (VMS1-VMSN) carry out car alarming.
Preferably, preceding vehicle speed described in step 1 is VbeforeiI ∈ [1, N], the detection of the i-th geomagnetism detecting device (i)
Preceding vehicle speed；
Vehicle speed is Vafter after described in step 1iI ∈ [1, N], the rear vehicle speed of the i-th geomagnetism detecting device (i) detection；
Front truck moment described in step 1 is TimebeforeiI ∈ [1, N], the front truck of the i-th geomagnetism detecting device (i) detection
Moment；
Rear car moment described in step 1 is TimeafteriI ∈ [1, N], the i-th geomagnetism detecting device (i) detection rear car when
It carves；
Preferably, data transmission described in step 2 is the first geomagnetism detecting device wireless communication module to the last one ground
Magnetic detector wireless communication module (T1-TN) be transmitted separately to preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment
First controller wireless communication module is to the last one controller wireless communication module (M1-MN), the first controller radio communication mold
Block is to the last one controller wireless communication module (M1-MN) by preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment
The first controller is transmitted separately to the last one controller (1-N)；
Preferably, safe distance described in step 3 is：
Wherein, VafteriI ∈ [1, N] are the rear vehicle speed of the i-th geomagnetism detecting device (i) detection；
Vehicle distances described in step 3 are：
Si=Vbeforei*(Timeafteri-Timebeforei)
Wherein, VbeforeiI ∈ [1, N] are the preceding vehicle speed of the i-th geomagnetism detecting device (i) detection, Timebeforei i∈
[1, N] it is the front truck moment of the i-th geomagnetism detecting device (i) detection, TimeafteriI ∈ [1, N] examine for the i-th geomagnetism detecting device (i)
The rear car moment of survey；
Vehicle-state described in step 1 is：
Wherein, StateiFor the vehicle-state of the i-th geomagnetism detecting device (i), StateiRear car and leading vehicle distance are indicated when=1
Danger, StateiRear car and leading vehicle distance safety are indicated when=0；
Preferably, car alarming described in step 4 is the vehicle-state State according to the i-th geomagnetism detecting device (i)iIt is logical
Cross the i-th variable information traffic signboard (VMSi) alarm, if Statei=1 indicates that rear car is dangerous with leading vehicle distance, and i-th can
Become information transportation Sign Board (VMSi) alarm is lighted to remind driver to draw a hand-cart away from if Statei=0 indicate rear car and front truck away from
From safety, the i-th variable information traffic signboard (VMSi) it is in OFF state.
Compared with prior art, the present invention has geomagnetism detecting device reliability height, affected by environment small, anti-interference ability
By force, of low cost, it is applicable to the region of the traffic environments such as underground interchange complexity, is had a wide range of application, practicability height；Foundation
Time, speed information calculating safe distance and the vehicle distances monitored in real time light mark when vehicle distances are less than safe distance
Know board.Mechanism is illustrated, easy to operate, has a wide range of application；Narrowband Internet of Things increases as system wireless package technique, than traditional technology
Beneficial 20dB still is able to normal use in the scene of complicated evil summary, Tunnel Lamp signal difference；VMS " paying attention to spacing " Sign Board warning
By force, driver is contributed to draw a hand-cart away from preventing the generation of rear-end collision；Consider spacing factor, establishes a kind of based on geomagnetism detecting
The rear-end collision prevention early warning system of device, realization draw a hand-cart away from the purpose for preventing rear-end collision from occurring.Mutually than existing methods, this method tool
Standby low cost, low-power consumption, long durable, easy-operating advantage, can be widely applied in different kinds of roads traffic environment, prevent the thing that knocks into the back
Therefore generation.
Description of the drawings
Fig. 1：For the system structure diagram of the present invention；
Fig. 2：For flow chart of the method for the present invention.
Specific implementation mode
Understand for the ease of those of ordinary skill in the art and implement the present invention, with reference to the accompanying drawings and embodiments to this hair
It is bright to be described in further detail, it should be understood that implementation example described herein is merely to illustrate and explain the present invention, not
For limiting the present invention.
Technical solution is used by system see Fig. 1 present invention：A kind of anti-early warning system of knocking into the back based on geomagnetism detecting
System, which is characterized in that including：First geomagnetism detecting device is to the last one geomagnetism detecting device (D1-DN), the first geomagnetism detecting device without
Line communication module is to the last one geomagnetism detecting device wireless communication module (T1-TN), the first controller wireless communication module is to last
One controller wireless communication module (M1-MN), the first controller to the last one controller (1-N), the first variable information traffic
Sign Board is to the last one variable information traffic signboard (VMS1-VMSN)；First geomagnetism detecting device to the last one ground
Magnetic detector (D1-DN) wirelessly communicated with the first geomagnetism detecting device wireless communication module to the last one geomagnetism detecting device
Module (T1-TN) be sequentially connected respectively by conducting wire；The first geomagnetism detecting device wireless communication module is to the last one earth magnetism
Detector wireless communication module (T1-TN) with the first controller wireless communication module to the last one controller channel radio
Believe module (M1-MN) mode is wirelessly connected successively by radio communication respectively；The first controller wireless communication module is to most
The latter controller wireless communication module (M1-MN) pass through respectively with first controller to the last one controller (1-N)
Conducting wire is sequentially connected；First controller is to the last one controller (1-N) and the first variable information traffic mark
Board is known to the last one variable information traffic signboard (VMS1-VMSN) be sequentially connected respectively by conducting wire.
Wherein, first geomagnetism detecting device is to the last one geomagnetism detecting device (D1-DN) one is laid per 50m, uniformly
Be laid under track, be all made of the geomagnetism detecting device of STF1000, while each geomagnetism detecting device is equipped with wireless geomagnetism signal and connects
Receive processor STJ1200；The first geomagnetism detecting device wireless communication module to the last one geomagnetism detecting device wirelessly communicates
Module (T1-TN) with the first controller wireless communication module to the last one controller wireless communication module (M1-MN)
Using wireless gsm module；First controller to the last one controller (1-N) intelligent controller uses AT89C51
Type microcontroller；The first variable information traffic signboard is to the last one variable information traffic signboard (VMS1-VMSN)
It uses " paying attention to spacing " printed words and using LED light emitter as the display screen of basic display unit, display screen matrix P162R1G is shown
Display screen substrate uses matt black, and whole screen shows black when not shining, display " paying attention to spacing " when shining.
In conjunction with Fig. 1 and Fig. 2, by taking interchange under Xiamen Ten Thousand Stone Hill-bell mountainous region as an example, the implementation of the present invention is introduced
Example, first geomagnetism detecting device to the last one geomagnetism detecting device (D1-DN) arrange 10 i.e. N=10 altogether
See Fig. 2, technical solution is used by method of the invention：A kind of anti-pre- police of knocking into the back based on geomagnetism detecting
Method, which is characterized in that include the following steps：
Step 1：First geomagnetism detecting device is to the last one geomagnetism detecting device (D1-DN) by the preceding vehicle speed of acquisition, rear speed
Degree, front truck moment and rear car moment are transmitted separately to the first geomagnetism detecting device wireless communication module to the last one geomagnetism detecting
Device wireless communication module (T1-TN)；
Preceding vehicle speed described in step 1 is VbeforeiI ∈ [1, N], the preceding speed of the i-th geomagnetism detecting device (i) detection
Degree；
Vehicle speed is Vafter after described in step 1iI ∈ [1, N], the rear vehicle speed of the i-th geomagnetism detecting device (i) detection；
Front truck moment described in step 1 is TimebeforeiI ∈ [1, N], the front truck of the i-th geomagnetism detecting device (i) detection
Moment；
Rear car moment described in step 1 is TimeafteriI ∈ [1, N], the i-th geomagnetism detecting device (i) detection rear car when
It carves；
Step 2：First geomagnetism detecting device wireless communication module is to the last one geomagnetism detecting device wireless communication module (T1-
TN) carry out data transmission preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment respectively；
Data transmission described in step 2 be the first geomagnetism detecting device wireless communication module to the last one geomagnetism detecting device without
Line communication module (T1-TN) preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment be transmitted separately to the first controller
Wireless communication module is to the last one controller wireless communication module (M1-MN), the first controller wireless communication module to last
A controller wireless communication module (M1-MN) be transmitted separately to preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment
First controller is to the last one controller (1-N)；
Step 3：First controller to the last one controller (1-N) according to preceding vehicle speed, rear vehicle speed, front truck moment with
And the rear car moment calculates separately safe distance and vehicle distances, and pass through safe distance and and vehicle distances analysis vehicle shape
State；
Safe distance described in step 3 is：
Wherein, VafteriI ∈ [1, N] are the rear vehicle speed of the i-th geomagnetism detecting device (i) detection；
Vehicle distances described in step 3 are：
Si=Vbeforei*(Timeafteri-Timebeforei)
Wherein, VbeforeiI ∈ [1, N] are the preceding vehicle speed of the i-th geomagnetism detecting device (i) detection, Timebeforei i∈
[1, N] it is the front truck moment of the i-th geomagnetism detecting device (i) detection, TimeafteriI ∈ [1, N] examine for the i-th geomagnetism detecting device (i)
The rear car moment of survey；
Vehicle-state described in step 1 is：
Wherein, StateiFor the vehicle-state of the i-th geomagnetism detecting device (i), StateiRear car and leading vehicle distance are indicated when=1
Danger, StateiRear car and leading vehicle distance safety are indicated when=0；
Step 4：Vehicle-state is transmitted separately to the first variable information by the first controller to the last one controller (1-N)
Traffic signboard is to the last one variable information traffic signboard (VMS1-VMSN) carry out car alarming.
Car alarming described in step 4 is the vehicle-state State according to the i-th geomagnetism detecting device (i)iIt is variable by i-th
Information transportation Sign Board (VMSi) alarm, if Statei=1 indicates that rear car is dangerous with leading vehicle distance, the i-th variable information traffic
Sign Board (VMSi) alarm is lighted, light the i-th variable information traffic signboard (VMSi) and show " paying attention to spacing ", it reminds and drives
Member draws a hand-cart away from if Statei=0 indicates rear car and leading vehicle distance safety, the i-th variable information traffic signboard (VMSi) be in and put out
It goes out state.
Although the first geomagnetism detecting device is used more herein to the last one geomagnetism detecting device (D1-DN), the first earth magnetism
Detector wireless communication module is to the last one geomagnetism detecting device wireless communication module (T1-TN), the first controller radio communication mold
Block is to the last one controller wireless communication module (M1-MN), it is the first controller to the last one controller (1-N), first variable
Information transportation Sign Board is to the last one variable information traffic signboard (VMS1-VMSN) etc. terms, but be not precluded and use other
The possibility of term.The use of these items is only for more easily describing the essence of the present invention, it is construed as any
It is a kind of it is additional limitation all disagreed with spirit of that invention.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The limitation of invention patent protection range, those skilled in the art under the inspiration of the present invention, are not departing from power of the present invention
Profit requires under protected ambit, can also make replacement or deformation, each fall within protection scope of the present invention, this hair
It is bright range is claimed to be determined by the appended claims.
Claims (3)
1. a kind of rear-end collision prevention early warning system based on geomagnetism detecting, it is characterised in that：First geomagnetism detecting device to the last one ground
Magnetic detector (D1-DN), the first geomagnetism detecting device wireless communication module to the last one geomagnetism detecting device wireless communication module (T1-
TN), the first controller wireless communication module to the last one controller wireless communication module (M1-MN), the first controller is to last
One controller (1-N), the first variable information traffic signboard to the last one variable information traffic signboard (VMS1-VMSN)；
First geomagnetism detecting device is to the last one geomagnetism detecting device (D1-DN) wireless with first geomagnetism detecting device
Communication module is to the last one geomagnetism detecting device wireless communication module (T1-TN) be sequentially connected respectively by conducting wire；Described first
Geomagnetism detecting device wireless communication module is to the last one geomagnetism detecting device wireless communication module (T1-TN) controlled with described first
Device wireless communication module is to the last one controller wireless communication module (M1-MN) mode is wireless successively by radio communication respectively
Connection；The first controller wireless communication module is to the last one controller wireless communication module (M1-MN) with described the
One controller to the last one controller (1-N) is sequentially connected by conducting wire respectively；First controller to the last one
Controller (1-N) and the first variable information traffic signboard to the last one variable information traffic signboard (VMS1-
VMSN) be sequentially connected respectively by conducting wire.
2. a kind of using the rear-end collision prevention early warning system described in claim 1 based on geomagnetism detecting based on geomagnetism detecting prevent
Knock into the back method for early warning, which is characterized in that includes the following steps：
Step 1：First geomagnetism detecting device is to the last one geomagnetism detecting device (D1-DN) by the preceding vehicle speed of acquisition, rear vehicle speed,
Front truck moment and rear car moment are transmitted separately to the first geomagnetism detecting device wireless communication module to the last one geomagnetism detecting device
Wireless communication module (T1-TN)；
Step 2：First geomagnetism detecting device wireless communication module is to the last one geomagnetism detecting device wireless communication module (T1-TN) will
Preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment carry out data transmission respectively；
Step 3：First controller to the last one controller (1-N) according to preceding vehicle speed, rear vehicle speed, the front truck moment and after
The vehicle moment calculates separately safe distance and vehicle distances, and passes through safe distance and and vehicle distances analysis vehicle-state；
Step 4：Vehicle-state is transmitted separately to the first variable information traffic by the first controller to the last one controller (1-N)
Sign Board is to the last one variable information traffic signboard (VMS1-VMSN) carry out car alarming.
3. the anti-method for early warning that knocks into the back according to claim 2 based on geomagnetism detecting, it is characterised in that：Described in step 1
Preceding vehicle speed is VbeforeiI ∈ [1, N], the preceding vehicle speed of the i-th geomagnetism detecting device (i) detection；
Vehicle speed is Vafter after described in step 1iI ∈ [1, N], the rear vehicle speed of the i-th geomagnetism detecting device (i) detection；
Front truck moment described in step 1 is TimebeforeiI ∈ [1, N], the front truck moment of the i-th geomagnetism detecting device (i) detection；
Rear car moment described in step 1 is TimeafteriI ∈ [1, N], the rear car moment of the i-th geomagnetism detecting device (i) detection；
Data transmission described in step 2 is the first geomagnetism detecting device wireless communication module to the last one geomagnetism detecting device channel radio
Believe module (T1-TN) that preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment be transmitted separately to the first controller is wireless
Communication module is to the last one controller wireless communication module (M1-MN), the first controller wireless communication module to the last one control
Device wireless communication module (M processed1-MN) preceding vehicle speed, rear vehicle speed, front truck moment and rear car moment be transmitted separately to first
Controller is to the last one controller (1-N)；
Preferably, safe distance described in step 3 is：
Wherein, VafteriI ∈ [1, N] are the rear vehicle speed of the i-th geomagnetism detecting device (i) detection；
Vehicle distances described in step 3 are：
Si=Vbeforei*(Timeafteri-Timebeforei)
Wherein, VbeforeiI ∈ [1, N] are the preceding vehicle speed of the i-th geomagnetism detecting device (i) detection, Timebeforei i∈[1,
N] it is the front truck moment that the i-th geomagnetism detecting device (i) detects, TimeafteriI ∈ [1, N] detect for the i-th geomagnetism detecting device (i)
The rear car moment；
Vehicle-state described in step 1 is：
Wherein, StateiFor the vehicle-state of the i-th geomagnetism detecting device (i), StateiIndicate that rear car is dangerous with leading vehicle distance when=1,
StateiRear car and leading vehicle distance safety are indicated when=0；
Car alarming described in step 4 is the vehicle-state State according to the i-th geomagnetism detecting device (i)iIt is handed over by the i-th variable information
Logical Sign Board (VMSi) alarm, if Statei=1 indicates that rear car is dangerous with leading vehicle distance, the i-th variable information traffic signboard
(VMSi) alarm is lighted to remind driver to draw a hand-cart away from if Statei=0 indicates rear car and leading vehicle distance safety, the i-th variable letter
Cease traffic signboard (VMSi) it is in OFF state.
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| CN201810220631.2A CN108281042A (en) | 2018-03-16 | 2018-03-16 | A kind of rear-end collision prevention early warning system and method based on geomagnetism detecting |
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| CN201810220631.2A CN108281042A (en) | 2018-03-16 | 2018-03-16 | A kind of rear-end collision prevention early warning system and method based on geomagnetism detecting |
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Cited By (1)
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| CN112185130A (en) * | 2020-10-16 | 2021-01-05 | 重庆伟登交通工程设计咨询有限公司 | Highway dangerous vehicle distance early warning system and method based on geomagnetic detector |
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