Brake test using accelerometer and low resolution GPS

We frequently conduct ride performance testing using DEWE43 and brake testing with another device (Racelogic VBox Mini)

Our Velocity input to Dewesoft is a USB GPS receiver which, does not have a fast enough refresh rate or positional accuracy to produce reliable brake test results. For example, when decelerating from 50km/h the speed displayed on Dewesoft does not reach zero until several seconds after the vehicle has physically stopped.

Purchasing a new speed recording device is not currently an option due to cost.

We already have a 3-axis accelerometer used for ride performance testing - Is it feasible to consider using this to somehow increase accuracy of the brake testing?

We need to display stopping distance in meters and deceleration in -m/s^2

Dear Phill,

the accelerator should measure both positive and negative acceleration. To calculate distance you can use double integration in math settings.

Regards

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