a device that is generating concepts

Accident warning system


Accident warning systems in cars already became a standard, but still there are huge amount of cars on roads that are not aligned with recent technologies, so we only partially control the situation. The rear feedback system is there to ensure, that the distance to the next car behind you, is kept within the safe range. Following the previous posts [#1 and #2], here is the update for the concept with simpler version.

The system includes led panel [10$ – 50$], signing to the following car when the distance is less then acceptable. It is installed by the rear window behind the driver, while facing with the notification panel towards the following cars.

Bluetooth connectivity to the smartphone is giving ability to read the speed based on GPS (disabled otherwise) and notice to driver (sound signal) in case of range violation, improving the awareness in case of the break (of course on top of looking into mirrors). The system includes a middle/long distance sensor [$100 😦 need to search for low cost solutions of sensors up to 100m] and basic controller [, while most of the system logic is within the phone. The system can be charged from the car or can get a constant power when installed permanently.

The signal can be color-based (can be configured from the phone app):

No signal – the range is more than two seconds

Yellow – one to two seconds distance

Red – less than one second distance

Blinking red – less than 0.5 second distance

The ranges are adjusted based on the time (+1s at night) and might be based on the weather in the area (fog/rain).


Author: Andrey Gabdulin Product Development

3 thoughts on “Accident warning system

  1. You didn’t specify Gyro purpose (or may be I miss it?). Anyway, simple gyro costs less than BT and simplify certification of the device. Once you have gyro, you know speed. In my opinion, BT and connectivity to phone is not required. Yet, this might be considered in more expensive versions and from marketing point of view.

    Did you consider ultrasonic sensor for distance measurements? I know applications where it works well for 25m. May be even more…

    If you would like to proceed and build it, please, talk to me. We can do it.

    • Thanks 🙂
      Initially I thought to use gyro for velocity measurement, but I think it would be very hard to derive the velocity with high precision over time (error accumulation), so I thought to use it for short time acceleration measurement for fast reactions to speed change and still have a feedback from the phone for long term error correction.
      Also gyro can be used for car vertical angle measurement (various purposes – e.g. false ground alarms when angle is positive and active transmitter small angle adjustment if system supports it).
      Regarding Ultrasonic, based on specs I have seen, the distance is relatively small – much less than 100m.
      I am already doing couple of projects. If you wish, I can assist you in this one, but it would be very hard to free some time even though I think it might be a good one and (most important) the life saving. Anyway, plz feel free to contact over email for further conversation: andrey at

  2. And, I forgot to mention:

    I think its very good idea with good potential!

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