presentation tw
TRANSCRIPT
Linking system between two vehicles using GPS
s1140176 Tatsuya Hasegawa
Contents
• Background• Purpose• Problem• Solution• Model• Problem
• How to measure distance
• Route check• Future works
Background
• Communication is possible anytime in real time.
• The communication between drivers are necessary in the ITS in the future.
• The accident by operating the car navigation system and the cellular phone, happens frequently.
Purpose
• Develop the group traveling support system
• The driving support system matched to user's situation without using communication tool such as cell phone.
Problem
• How to measure distance between two vehicles.
• How to check route that the leading vehicle passed through.
5
Solution • Calculate total mileage of each vehicle. ↓ Total mileage of the following subtract from
total mileage of the leading.
• Calculate direction to current coordinate from last received coordinates
↓ By calculating movement direction, the route is
checked.
6
Model -How to measure distance-
Measuring the distancebetween two vehicle
7
Model –route check-
Check whether the following vehicleruns the same route with the leading vehicle
This is wrong route!
8
How to measure distance
),( yxP ttt
180
xX tt
180
yY tt
The coordinate information
Angle ⇒ convert radiun
9
)(1YYAY ttt
yXXAX tttt 11cos)(
A is radius of the earth. A = 6378137m
⊿ X is the displacement in longitude direction
⊿ Y is the displacement in latitude direction
YXD tti 22
Measure the distance between two points
How to measure distance
n
iin DD
0
Calculate the run mileage
DDD ncarfollowncarlead ,_,_
The difference of each mileage is calculated.
10
Route check
XXYY
tt
tttF1
1)(
XXYY
tt
tttF1''
1'')'('
A lean of the leading vehicle to time t from time t-1
A lean of the following vehicle to time t’ from time t’-1
11
0)( >tF First quadrant or third quadrant
0)( <tF Second quadrant or fourth quadrant
Route check
First quadrantSecondquadrant
Third quadrant Fourth quadrant
North
East
),( YX tt
),(11 YX tt
),( YX tt
Route check
13
)(tF
If the quadrant of F( t) equals the quadrant of F’(t’), the following vehicle run the same route with the leading vehicle.
第1象限と第3象限、 第2象限と第4象限の区別
)'(' tFThe quadrant of = the quadrant of
The difference of first quadrant and
third quadrant
First quadrant Third quadrant
The difference of second quadrant
and fourth quadrant
Fourth quadrant Second quadrant
01>XX tt
01<XX tt
Future works
• How communicate with two divices• Improve the demonstration