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# Optical sensor

## on Mar 30, 2012

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## Optical sensorPresentation Transcript

• ByABDUL LATHEEF M AROLL NO : 1S7 EI
• 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
• 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
•  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
• OPTICAL SENSOR
• PARAMETERS Measurement range : 15-100cms Output voltage : 0.5-2.5 volts Emitters : LED, LASER Average output power : 0.1mW
• MEASUREMENT PLOTS OF LED
• MOUNTING OF SENSORS
• 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 .
• HOW TO MEASURE TILT ANGLE?
•  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
• SIGNAL PROCESSING
• RESULTS ON RACETRACK
• ADVANTAGES Small size Low cost Low weight <10 gm Variable range depending on mounting condition Accurate measurement
• 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
• APPLICATION Tilt angle measurement in sports bikes
• 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
• REFERENCES IEEE WIKIPEDIA
• Thank You