stack/hopr

This is the latest in the array of technologies that make driving easier. These cutting edge parking sensors do not use ultrasonic, magnetic or infrared sensing. Instead, it relies on the sound near audible range and material vibration. It couples this with visual data to give the driver a good idea of reversing space.

Pros:

• Maximizes the reversing distance available.
• Cheap.

Cons:

• Does not work well around hard metal surfaces, sharp corners.
• Sensing distance is low compared to electromagnetic sensors.
• Requires the driver to reverse at extremely low speeds.

In simple words, you rely on your senses while backing the car. You take a good look around before getting into the car. Then, start reversing. If the space is too tight, you employ the above mentioned technology. You can gently touch whatever is behind the vehicle (except humans). The trick is touching the object briefly with your bumper. The bumper in most cars is designed for zero damage on low speed contact. So, you don’t damage anything. And by feeling the sound plus vibration coming from the bumper, you can stop at the right moment. All this while, watching the space behind the car using direct vision. This direct vision is enhanced if you place one hand behind the co-driver seat.

Use this technology for a perfect reversing maneuver, it’s a skill.