Build your own Black Ice Detection system for your car using AutoPi
The term “Black ice” refer to a winter phenomenon, where a layer of ice on the road is so thin it becomes transparent and thus appears “black” from the road below. This is a very common situation during winter times and can create hazardous situations for vehicles and pedestrians. The phenomenon often occurs when the temperature is right around freezing point and when a light rain hits a road surface which is below freezing point.
Did you know?
Over 1,300 people are killed and more than 116,800 people are injured in vehicle crashes on snowy, slushy or icy pavement annually.
The Bureau of General Safety in Maine (United States) has issued a list of things to watch out for when driving, this includes:
- Pavement looks new or dark
- Low-lying areas which can collect melted water that can refreeze
- Use seat covers
- Shaded road areas, where the sun can not heat it up
- Slow down
- Wear seatbelts
- Drive with headlights on
- Increase safety margins to vehicles ahead
- Avoid quick steering movements
What is AutoPi?
AutoPi is a small device that plugs into the OBD-II port of your car.
Once connected, the AutoPi device will automatically start working. It has 4G/3G connectivity, so it is always connected to the Internet. It also comes with a lot of other features, for example continuous GPS tracking. One of the main advantages of the AutoPi is its many extension options.
It comes with an online cloud dashboard, that you can login to from any device. From here you can setup your system and do real-time tracking of your vehicle telematics.
Black Ice detection using AutoPi
Some car models have outside temperature sensors built in. These temperature sensors is meant to measure the outside air temperature, but often does not give a precise reading of the air temperature because of engine heating. And when dealing with “black ice” it is more precise to know the surface temperature.
AutoPi has a lot of extension possibilities through one of its ports. This makes it possible to build and extend a lot of different things with your AutoPi. An example is this infrared temperature sensor from Phidgets Inc:
This specific sensor can be connected directly to one of the USB ports of the AutoPi dongle. An infrared thermometer measures the infrared energy from an object and uses this to determine the temperature of that object (or surface). Using this technique it is possible to measure temperature without touching the object.
The infrared temperature sensor is mounted on the vehicle (a specific casing can be acquired for the Phidgets sensor) and set to point towards the road surface in a forward pointing angle, this must be calibrated to give the best result.
When the sensor has been installed in the vehicle, it is simply connected to the USB port of the AutoPi.
The AutoPi dongle and IoT platform contains a lot of possibilities to extend the temperature input from the Phidget sensor. Because all of the input and outputs in the AutoPi dongle, it can be combined in a rule based system (also known as an if-this-then-that system). Using this it is possible to build an in-car warning system using the built-in speaker in the AutoPi dongle.
The AutoPi dongle will record the temperature measured by the infrared temperature sensor, and based on the rules defined in the AutoPi cloud dashboard it is able to react on these measurements. An example could be to warn the driver by, using the speaker in the dongle. This can be accomplished using a cloud based service, like Google Assistant.
This is an example of how the AutoPi can be used to extend the usage and safety of your vehicle. We hope you got a better understanding of what you can do with the AutoPi.
Subscribe to our newsletter
Don’t worry, we’ll only send you the best stuff - no spam
Or follow us here
Other blog posts for further reading
How to easily add remote theft detection to your car
Your car is a valuable and expensive asset. Even with full insurance a car theft can be a cumbersome and expensive affair. But how can you help prevent theft of your car and possibly avoid an increased insurance premium? In this blog post, we explorer the possibilities to get remote theft detection, using the AutoPi platform.
Using a Raspberry Pi Zero as an IoT platform for your car
Internet of Things (IoT) is a popular buzzword in the tech/gadget community. The concept is that all the devices in our everyday life can be online/connected to the Internet 24/7, and thereby help to improve and make our lives more efficient. This includes our light bulbs, kitchen appliances, TVs, alarm and heating systems etc. All our "things" should be able to communicate with each other and be controlled from everywhere in order to achieve a more efficient and convenient world for us to live in.
How-to build a Raspberry Pi touch screen car computer
Integrated car computers are not only for expensive cars like the Tesla Model X nor is it only for complex car DIY projects that require you to have a degree in engineering. Not many people know how easy it is; by combining a few components it is possible to make it for any car. Follow this guide to see how it can be done.