Electrification of Toll Systems using Speed Breaker Energy Harvesting technology

Abstract

As traffic on highways increases, toll booths require a reliable power supply for automated systems like gates, cameras, and lighting. Traditional solutions such as grid electricity or batteries are costly and environmentally taxing. This invention introduces a Hybrid Energy Generation System that harvests kinetic energy from vehicles passing over speed breakers. Using a rack-and-pinion mechanism connected to a DC motor, the system efficiently converts mechanical energy into electricity. The energy is stored in batteries via a boost converter and bridge rectifier, ensuring a reliable, independent power source for toll gate infrastructure. This cost-effective and eco-friendly system is ideal for remote, off-grid locations, reducing both operational costs and environmental impact.

Specification

Description:The system starts with a rack-and-pinion mechanism beneath the speed breaker that engages with a 38-tooth pinion gear when a vehicle passes over. This initiates a series of gear reductions through a 25-tooth gear and then a 15-tooth gear, each carefully selected to increase rotational speed and optimize torque transfer to a DC motor. The motor operates efficiently within this setup, converting mechanical energy into Direct Current (DC) electrical energy.
The generated DC power flows through a bridge rectifier, stabilizing the output by converting any induced alternating current (AC) fluctuations into pure DC. This stabilized power is temporarily stored in a capacitor bank with a capacity of 5,000 µF, which smooths power flow before it passes through an XL6009 boost converter. The boost converter raises the voltage to the required level, allowing the energy to be stored in a battery for reliable, long-term power supply. This battery storage ensures continuous power availability for critical toll gate functions, such as operating gates, cameras, and lighting, making this hybrid energy system ideal for remote infrastructure applications requiring independent power solutions.
The prototype generates 15 volts and 50 milliamps (0.05 amps) per press, producing 0.75 watts of power each time the mechanism is engaged. With 10 vehicles per hour over a 24-hour period, it generates a total of 180 watts daily, which is sufficient to power essential toll gate appliances like CCTV cameras, automated barriers, and other low-power equipment reliably.
, Claims:1.The rack-and-pinion system under the speed breaker efficiently captures energy from vehicle motion, minimizing energy losses and improving overall energy transfer.
2.The selected gear ratios optimize speed and torque, enhancing the DC motor's efficiency and boosting energy generation.
3.A capacitor bank and bridge rectifier stabilize and smooth the power output, ensuring steady energy flow and protecting against reverse currents.
4.A boost converter increases voltage for battery storage, providing reliable power to toll gate systems, regardless of traffic or energy demand.

Documents