Recent content by tjvv

Thank you. Light sensor and RF signal do not seem will work as they can fade away irrespective if I am underwater or not. Barometer seems also will not work as it is designed for air measurements (not water) I was wondering if the fact that the touch panel goes crazy underwater may provide a...

Hi, I have a waterproof smartphone with sensors like barometer, gyro, accelerometer, microphone). I want to do an app that 1) detects that the phone is underwater: I though in using some reading from touch panel as water is electro conductive and it may provide me some reading to indicate...

Hi AT, sorry I meant Coordinate acceleration (CA) relative to ground (since it excludes the Earth gravity). So from your formula it means that to convert a G force into BW it is just sum the measured g force with earth´s gravity? Example: BW = CA+1[g] BW = 2 + 1 BW = 3 (getting the initial...

I mean proper acceleration (PA) that an accelerometer measures. Yes, when I mean bodyweight it is the vertical ground reaction force. Since it is a force we can put in Newton´s 2nd law (F=m * a): F = [(m * acceleration measured) / (m * Earth acceleration)] + 1 //+1 is to consider only...

Hi guys, I have a table with vertical peak acceleration values [g] and I want to find out a formula that convert the [g] values into ground reaction forces in units of body weight (BW). I think Newton´s 2nd law (F = m x a) may help but I am stuck on finding a generic relationship (problem is...

Hi guys, I have been searching for references that could tell what are the average limits of impact (in Newtons per example) of running activity into human´s feet (material = bone). Basically the question I am trying to answer is per example to understand how much of linear acceleration...