Integrating Braking System Employing Pulse Width Modulation (PWM) and Sensors for Speed Limiting and Braking

From time to time, the Public Health Specialist has been solicitous and concerned regarding the consequences of cell phone usage on automobile collision. Distraction among drivers are the core factor leading to car accident, as the primary foremost death reasons for worldwide population under the age of 40 years. In this project, reverse current electrical braking was proposed. Multiple triggering points were involved including proximity sensor, rain module, grip intensity detector, and humidity sensor. Each of them was used to transmit signal to enable speed limiting or fully braking. An average of 2.6 seconds of braking time was recorded. To shorten braking time, Pulse Width Modulation (PWM) was employed to convert the steady power braking signal into a square wave fixed frequency signal with varied amplitude of command signal, switching direction of DC-motors to halt with quick pulse duty cycle, ameliorating efficiency of braking response. As a result, an average of 1.49s of braking was recorded, equivalent to 36% of time reduction compared to reverse current braking without PWM. In short, electrical braking with enhancement of PWM can significantly reduce braking time.