Design and Implementation of Automatic Emergency Braking System

Abstract

Vehicle technology has increased rapidly in recent years, particularly in relation to braking systems and sensing systems. ASS (active safety systems) are being researched and developed to prevent accidents and target mitigation. Among many useful active safety systems, it has been reported that AEBS (Advanced Emergency Braking Systems) effectively prevents accidents and reduces casualties simultaneously. The project aims to distinguish between systems currently in production like traction control (TC), electronic brake force distribution (EBD), brake assist (BA) and electronic stability control (ESC) functions and future systems that are currently in development. The project aims to develop a prototype system that offers a collision functionality in production vehicle, a system which can operate automatically with the help of high profile sensors based relay circuit and some modification in traditional braking system that can alert the driver in front collision and apply the brake automatically in emergency or critical situation.

Introduction

Driving is a compulsory activity for most people. People use their car to move from one place to other place. The number of vehicles is increasing day by day. Nowadays, accidents are increasing and are uncertain. Accident will occur every time and everywhere and cause worst damage, serious injury and even death. These accidents are mostly caused by delay of the driver to hit the brake. This project is designed to develop a new system that can solve this problem where drivers may not brake manually but the vehicles can stop automatically by detecting obstacles. This project is about a system that can control braking system for safety. Using ultrasonic as a ranging sensor, its function based on ultrasonic wave. After transmitting by transmitter, the wave can reflect when obstacle is detected and then received by receiver. The braking circuit’s function is to slow down or stop the car automatically after receiving signal from the sensor.

The objectives of this project are
i. To develop a safety car braking system using ultrasonic photoelectric retro reflective sensors.
ii. To design a vehicle with less human attention to the driving.

Scope of project is to develop an ultrasonic sensor to detect the obstacle and to process the output from the ultrasonic sensor and to drive the pneumatic cylinder as an actuator.

Working Principle
The system is consist of two photoelectric distance measurement sensors, kit of electronic control unit to give input and output of sensor, hydraulic circuit and single acting hydraulic cylinder . The sensor is having 15 volt supply and can measure hurdle upto 10m .The Brake Kit is going to be fabricate having redesign  brake paddle with reduced mass. The hydraulic cylinder we are using is single acting spring return
type having solenoid valve.

Design and Implementation of Automatic Emergency Braking System
Design and Implementation of Automatic Emergency Braking System

Components Used:
1. Braking kit of motorcycle: It consists of disc brake driven by motor and brake calipers of a motorcycle to reduce the cost of prototype.
2. 5/2 solenoid valve: Solenoid valve is used to bypass the braking circuit to actuate the brakes
3. Ultrasonic sensor: It is used to detect objects or obstacles upto a range of 10m
4. Reflector
5. PLC Circuit: Ladder logic relays to actuate the alarm and actuate the solenoid valve
6. Alarm or hooter

Conclusion
1. If we can reduced the Driving Interference of Braking and Give the Responsibility To Intelligence Sensor which will Take decision and initiate the Response To give Warning alarm First and if Distance of impact is Closing it will Apply brake Automatically and Stop the Vehicle in advanced.
2. Such that Distraction Driving is a Major Contributor to Accident death, thus by implementing this System we can reduced the Close impact Potential Accident.
3. By dragging the front seat at opposite direction to Impact and increase the Distance And Time Of Direct Impact the death can be minimized and safety of vehicle also can improved, and also it can add the new feature to the car which will attract the customer who prefer safety while traveling.
4. The results of the simulations showed that by using an energy absorbing seating system, crash deceleration can be effectively attenuated and occupant injuries significantly reduced in comparison to conventional seating systems. In future, physical crash tests will still be required as the final certification method for approval of a particular crashworthy mechanical system. However during the development process the application of computer simulation methods as presented in this paper show that it is possible to reduce development costs.

Reference Download Report :

Design and Implementation of Automatic Emergency Braking System

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