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### Presentation Tw

1. 1. Linking system between two vehicles using GPS s1140176 Tatsuya Hasegawa
2. 2. Contents <ul><li>Background </li></ul><ul><li>Purpose </li></ul><ul><li>Problem </li></ul><ul><li>Solution </li></ul><ul><li>Model </li></ul><ul><li>Problem </li></ul><ul><li>How to measure distance </li></ul><ul><li>Route check </li></ul><ul><li>Future works </li></ul>
3. 3. Background <ul><li>Communication is possible anytime in real time. </li></ul><ul><li>The communication between drivers are necessary in the ITS in the future. </li></ul><ul><li>The accident by operating the car navigation system and the cellular phone, happens frequently. </li></ul>
4. 4. Purpose <ul><li>Develop the group traveling support system </li></ul><ul><li>The driving support system matched to user's situation without using communication tool such as cell phone. </li></ul>
5. 5. Problem <ul><li>How to measure distance between two vehicles. </li></ul><ul><li>How to check route that the leading vehicle passed through. </li></ul>
6. 6. Solution <ul><li>Calculate total mileage of each vehicle. </li></ul><ul><li>　　　　　↓ </li></ul><ul><li>　 Total mileage of the following subtract from total mileage of the leading. </li></ul><ul><li>Calculate direction to current coordinate from last received coordinates </li></ul><ul><li>　　　　　↓ </li></ul><ul><li>　 By calculating movement direction, the route is checked. </li></ul>
7. 7. Model -How to measure distance- Measuring the distance between two vehicle
8. 8. Model –route check- Check whether the following vehicle runs the same route with the leading vehicle This is wrong route!
9. 9. How to measure distance The coordinate information Angle 　⇒　 convert radiun A is radius of the earth. A = 6378137m ⊿ X is the displacement in longitude direction ⊿ Y is the displacement in latitude direction Measure the distance between two points
10. 10. How to measure distance Calculate the run mileage The difference of each mileage is calculated.
11. 11. Route check 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 First quadrant or third quadrant Second quadrant or fourth quadrant