working of reverse parking sensor by using IR sensor

1. K C Karthik
Automotive Electronics

2. Reverse Parking Sensor

3. Parking sensors
 Parking sensors are proximity sensors for road vehicles
designed to alert the driver to obstacles while parking.
 These systems, which use either electromagnetic or
ultrasonic sensors, are marketed variously by vehicle
manufacturers.
 First it is used in Jaguar Cars in Coventry.

4. Parking sensors
 Rear sensors may be activated when reverse gear is
selected and deactivated as soon as any other gear is
selected
 These systems will measure the distances to nearby
objects via sensors located in the front and/or rear
bumper or visually minimized within adjacent grills or
recesses.

5. List of Equipment
 Power Supply 24V, DC Supply
 Optical Sensor 3 nos.
 LED Red colour, 3 nos.

6. Proximity IR Sensor
 It is used to detect objects and obstacles in front of
sensor.
 Sensor keeps transmitting infrared light and when any
object comes near, it is detected by the sensor by
monitoring the reflected light from the object.
 It can be used in robots for obstacle avoidance & line
follower robot, for automatic doors, for parking aid
devices or for security or contact less tachometer by
measuring rpm of rotation objects like fan blades.

7. Features
 IR transmitter LEDs
 3 pin easy interface connector
 Indicator LED
 Active High on object detection

8. Specifications
 Power Supply : 5V DC Power Consumption: 50mA max
 Detection range 3m
 Operation range varies according to color of the object,
light color has more range.
 Digital output. Active with logic “1”
 Dimensions : 41x27 mm

9. IR Sensor

10. Block diagram

11. Working
 Reverse Parking Sensor System adopts infra-red light
sensors to measure the distance between the car and the
obstacles, and reminds the driver of safe distance
accurately when reversing a car. In this manner we are
alerted when approaching too close to the obstacle.
 All distances mentioned before can vary, depending on
infra-red transmitting and receiving LEDs used and are
mostly affected by the color of the reflecting surface.
Black surfaces slower greatly the device sensitivity.

12. Working
 First sensor will sense the obstacle at 1m and first LED
illuminates, second sensor will sense the obstacle and
1more LED illuminates at about 0.6m along with first LED.
All 3 LEDs will glow when obstacle is at 0.3m. The LEDs
will glow till the obstacle is sensed by the sensors.
 The LEDs are mounted on the Rear view mirror. Along
with light, Buzzer can also be connected to intensify the
caution.

13. Experimental setup

14. Experimental setup

15. Future Modification
 Electromagnetic Sensor:
Electromagnetic parking sensors are often sold as not
requiring any holes to be drilled offering a unique design
that discreetly mounts on the inner side of the bumper.
 A camera surrounded by EM sensor

16. Conclusion
 With rising population it is apparent to determine a rise in
the vehicles. On the subject of cars, it is simple to see an
increase in the number of automobiles.
 As the increase in the vehicles will also increases the no.
of accidents. For safe and ease of driving, new
technologies are embedded into the automobiles.
 Parking sensor will assist the driver with cautions while
driving, which reduces the no. of accidents. Now-a-days
an Electromagnetic sensor will assist driver more
accurately and which is fitted inside the bumper

17. Thank you