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# Optical sensor

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### Optical sensor

1. 1. ByABDUL LATHEEF M AROLL NO : 1S7 EI
2. 2. CONTENT INTRODUCTION OPTICAL SENSOR  PARAMETERS  MEASUREMENT PLOTS OF LED  MOUNTING OF SENSOR  TILT ANGLE  HOW TO MEASURE TILT ANGLE?  SIGNAL PROCESSING  RESULTS ON RACETRACKS ADVANTAGES DRAWBACKS APPLICATION CONCLUSION REFERENCE
3. 3. INTRODUCTION New technology in Modern vehicles to enhance safety Anti Lock Braking System (ABS) Tilt angle (Roll angle) – crucial variable to determine motorcycle behavior Represents the amount of inclination to ensure the force balance
4. 4.  The technology uses a sensor to measure tilt angle at real-time Tilt angle is a by product of GPS but does not provide at real-time Optical sensors are suitable as technologically as well as economically for racing applications
5. 5. OPTICAL SENSOR
6. 6. PARAMETERS Measurement range : 15-100cms Output voltage : 0.5-2.5 volts Emitters : LED, LASER Average output power : 0.1mW
7. 7. MEASUREMENT PLOTS OF LED
8. 8. MOUNTING OF SENSORS
9. 9. TILT ANGLEDefinition : Angle represents the amount of inclination that the bike needs in order to ensure the force balance during the curved trajectory and hence to reach a steady state cornering condition .
10. 10. HOW TO MEASURE TILT ANGLE?
11. 11.  Tilt angle ( ϕ )= arctan((d1 − d2)/L) d1 = Ho + L/2 tan (ϕ) d2 = Ho - L/2 tan (ϕ) Where,  L :- Lateral displacement b/w the 2 distance sensors  Ho :- Distance b/w each sensor and the ground when the bike axis is vertical  d1&d2 :- Distance b/w the marked points and the ground
12. 12. SIGNAL PROCESSING
13. 13. RESULTS ON RACETRACK
14. 14. ADVANTAGES Small size Low cost Low weight <10 gm Variable range depending on mounting condition Accurate measurement
15. 15. DRAWBACKS LED emitter suffers too much from solar interference LED not adequate for real-time measurements at high motorbike speeds Roughness of roads make noise interference
16. 16. APPLICATION Tilt angle measurement in sports bikes
17. 17. CONCLUSION Optical sensors are used to measure tilt angle LED and LASER emitters are used LASER is used more than LED Sensors must be mounted at a reliable distance from the ground
18. 18. REFERENCES IEEE WIKIPEDIA
19. 19. Thank You