x Periood 21.11.2016 - 20.11.2017 viiakse Euroopa Regionaalarengu Fondi kaasrahastamisel ellu projekt „Wivel Starditoetus” summas 15 000 EUR mille raames toimub “Wiveltracker-i” tootmestamine ning turule toomine. Starditoetuse projekti eesmärgiks on Wivel seadmele tutvustava video loomine, pakendi,- ning mobiilirakenduse „W-Works“ väljatöötamine.

Wivel, not your average OBDII device

Wivel is small and compact device for measuring car performance as well as your skills as a racetrack driver. A great research has been done to turn it into one of the most accurate performance meters which measures all possible acceleration and braking times, cornering forces, laps and distances, moreover, even estimates your car wheel power and torque.

 

Designed for precision

Wivel will not sacrifice precision for the sake of making itself invisible like many other OBDII dongles. It is easily noticeable that GPS signal is best on fields with clear sky and will not get satellite fixes inside buildings. As Wivel uses a patch antenna, it is mounted inside the vehicle in a way, GPS antenna is located horizontally, in best position beneath the windshield. If this is not enough, the antenna can be removed from the device and placed outside, on top of the car.

 

However, it should be noted that the position of the device itself is not restricted – it can be mounted as desired, the device calibrates its position automatically. What is probably the most important feature, the Go Pro style mount assures its firm attachment during hard accelerations.

 


Sensor fusion

The advantage of Wivel is that it will combine all possible measurements of vehicle dynamics parameters into one compact package. By doing so, the ultimate precision is achieved through several sensors’ data fusion in the firmware of the device. Using data derived from disparate sources allows to provide information that is more accurate than it would be possible when using individual sources. For example, precise location is achieved by using GPS and inertial sensor measurements.

 

GPS will give the absolute position and inertial sensor complements this by measuring relative movements very precisely. After digitally filtering the individual sensor data, sensor fusion takes place using extended Kalman filter implementation that combines output using weights by the quality of measurements, which is in fact usual practice in GPS navigation systems. Wivel also has secondary sensors such as a magnetometer and a barometric altimeter to improve calculation of some parameters like drift angle, etc.

 

Read more about sensor fusion in Wikipedia or watch this simple guide how sensor fusion works in Youtube

 

How good it can be compared with ordinary smartphones?

 

Think about Wivel the same way you think about your smartphone or wearable tracker that is customized for you, where Wivel is customized for your car or your motorbike. Wivel connects with a vehicle directly for maximum integration into its dynamic processes. Smartphones cannot achieve that and have to give up on precision.

 

Unlike regular battery devices, vehicles don’t have restrictions on energy consumption. Therefore, your device can concentrate on high frequency measurements and calculations without being disturbed by other functions. High sensor update rate means that there is more data available for calculations, however it is meaningless if uncertainty is also high. Because of that, the data mining inside the firmware is dynamic, adapting to conditions.

 

Wivel GPS updates at a 50 Hz resolution, as well as other internal sensors (including gyroscope, accelerometer, digital compass, magnetometer and altimeter) that are averaged with several times higher frequencies. OBDII parameters are inquired at a car’s maximum allowed rate. Data transmission over Bluetooth is also dynamic and adjusts itself to the situation. It means that stopping at the traffic lights generates less data than the high speed driving on a circle track

 

Do Inexpensive Performance Meters Work?

 

A while ago popular "Car and Driver Magazine" published an article about testing inexpensive performance meters suggesting that they are as accurate as more expensive test gear. 11 years have passed and since then technology has become smarter, smaller and cheaper which enables us to deliver great performance for affordable price.  

 

Link to the article 

 


    By Eero Väljaots