Brake pressure sensor based LOAD CELL

[Belatti]

Thanks Caito, do you know if this works reflecting on tarmac?

[DaveW]

Data Sheet....

[Caito]

I'd guess that if you make your own lookup table of output voltage vs distance it could work.

Corsys datron uses similar techonology, but they have more expensive CCD.


Maybe it's a long shot, but it's cheap enough to give it a go.

[DaveW]

Corsys datron uses similar techonology, but they have more expensive CCD..... Maybe it's a long shot, but it's cheap enough to give it a go.

All true but, in my opinion, the timing information shown on the data sheet affects way the results can be used.

In your example, the SCU inserts a time delay of around (5.0 + 16.5 +/- 3.7) milliseconds, which translates to about 10 percent of a heave mode cycle for an F1 vehicle (or 50 percent of the hub mode cycle).

[Tim.Wright]

Corsys datron uses similar techonology, but they have more expensive CCD..... Maybe it's a long shot, but it's cheap enough to give it a go.

All true but, in my opinion, the timing information shown on the data sheet affects way the results can be used.

In your example, the SCU inserts a time delay of around (5.0 + 16.5 +/- 3.7) milliseconds, which translates to about 10 percent of a heave mode cycle for an F1 vehicle (or 50 percent of the hub mode cycle).

For a constant speed measurement averaged out over a few seconds the delay should be irrelevant right?

[Belatti]

I have fabricated and used the "ring brake pressure sensor" based cells and they work fine. I have learned some good stuff from a straight line test regarding the car but I have found some improvements to make to the sensors to have more reliable data.

[Caito]

Are you post-processing the data, or just showing it up with your logger software?

Some filtering would really improve you S/N ratio since it's a really low frequency signal.

[Belatti]

I export to excel and work the data myself

[Belatti]

I have conducted a couple of successful straight line aero tests with the hidraulic cells now. Just to be sure I also installed the linear pots. The signal vs noise ratio is better using the cells. After a first try where I remachined some internal diameters to obtain desired pressures (they still could be improved), I could make sure smaller downforce differences are readable.



Whats interesting when you plot cell and pot together is the phase difference between the front (and thus more rigid) and the rear.

ps: both are unfiltered traces