27-03-2017, 12:36 PM
An automatic rail door on a level crossing that replaces the doors operated by the porter. The system reduces time during which the door remains closed. This type of gates can be used at an unmanned level crossing where the chances of accidents are higher and reliable operation is required. Since the operation is automatic, the error is avoided due to manual operation. The system works with a control based on microcontroller. The proposed system uses the ATmega 16A microcontroller. With the help of IR sensors. The arrival and departure of the system is monitored and the door is operated accordingly.
The first level crossings had a pavilion in a nearby cabin that, when approaching a train, waved a red flag or a lantern to stop all traffic and clear the tracks. Later manual or electric doors were introduced that closed the road. The floodgates were intended to be a complete barrier against the intrusion of any road traffic on the railroad. In the early days of railroads much road traffic was horsedrawn or livestock included. It was therefore necessary to provide a real barrier. Thus, crossing gates, when closed to road traffic, crossed the entire width of the road. When they were opened to allow road users to cross the line, the gates were balanced across the width of the railroad, preventing any pedestrians or animals getting on the line.
With the emergence of motor vehicles, this barrier became less effective and the need for a barrier to livestock declined dramatically. As a result, many countries replaced closed crossings with weaker but higher visibility barriers and relied on road users following the warning signs associated with stopping them.
In many countries, crossings on the less important roads and railways are often "open" or "uncontrolled", sometimes with warning lights or bells to warn you of approaching trains. Crosses without passage represent a security problem; Many accidents have occurred due to lack of notice or obeying the warning.
Level crossings present a significant risk of collisions between trains and road vehicles. Level crossings in India, China, Thailand and Malaysia continue to be largely hand operated, where the barriers are lowered using a manual switch when the trains approach.
Block diagram:
The first level crossings had a pavilion in a nearby cabin that, when approaching a train, waved a red flag or a lantern to stop all traffic and clear the tracks. Later manual or electric doors were introduced that closed the road. The floodgates were intended to be a complete barrier against the intrusion of any road traffic on the railroad. In the early days of railroads much road traffic was horsedrawn or livestock included. It was therefore necessary to provide a real barrier. Thus, crossing gates, when closed to road traffic, crossed the entire width of the road. When they were opened to allow road users to cross the line, the gates were balanced across the width of the railroad, preventing any pedestrians or animals getting on the line.
With the emergence of motor vehicles, this barrier became less effective and the need for a barrier to livestock declined dramatically. As a result, many countries replaced closed crossings with weaker but higher visibility barriers and relied on road users following the warning signs associated with stopping them.
In many countries, crossings on the less important roads and railways are often "open" or "uncontrolled", sometimes with warning lights or bells to warn you of approaching trains. Crosses without passage represent a security problem; Many accidents have occurred due to lack of notice or obeying the warning.
Level crossings present a significant risk of collisions between trains and road vehicles. Level crossings in India, China, Thailand and Malaysia continue to be largely hand operated, where the barriers are lowered using a manual switch when the trains approach.
Block diagram: