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RE: Proposed Elements Not Currently In Data Spec

From: ALDRIC LOYER <aldric.loyer@mpsa.com>
Date: Tue, 8 Jul 2014 07:02:16 +0000
To: "Rees, Kevron" <kevron.m.rees@intel.com>, Paul Boyes <pb@opencar.com>
CC: "public-autowebplatform@w3.org" <public-autowebplatform@w3.org>
Message-ID: <E3FD066E27BA1440ABAA8B628C618C5A328D6B43@YLAV6730.inetpsa.com>
My comments inline [ALO]
Best regards

--------------------------------------------------------------------------
Aldric LOYER
PSA Peugeot Citroën
Responsable de l'UEI COTI
(Connectivity, Telematic and Infotainment)
Direction de la Recherche et de l'Ingénierie Avancée
Tel : +33 (0) 1 57 59 81 35 (20 81 35)
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-----Message d'origine-----
De : Rees, Kevron [mailto:kevron.m.rees@intel.com] 
Envoyé : lundi 7 juillet 2014 21:59
À : Paul Boyes
Cc : public-autowebplatform@w3.org
Objet : Re: Proposed Elements Not Currently In Data Spec

On Mon, Jul 7, 2014 at 11:39 AM, Paul Boyes <pb@opencar.com> wrote:
> See comments in line...
>
>
> Paul J. Boyes
> --------------------------------
> Mobile:   206-276-9675
> Skype:  pauljboyes
>
>
>
>
> On Jul 7, 2014, at 11:09 AM, Rees, Kevron <kevron.m.rees@intel.com> wrote:
>
> On Mon, Jul 7, 2014 at 10:55 AM, Paul Boyes <pb@opencar.com> wrote:
>
> I propose that the follow elements be added to the Data Spec.  Thoughts?
>
> Barometric Pressure - current exterior barometric pressure
> Brake Pedal Depressed - whether brake pedal is depressed or not
> Wheel Speed - zoned? - speed of each wheel
>
>
> Is this similar to WheelTick?  or more abstract?  Should WheelSpeed
> replace WheelTick?
>
>
> —wheel tick is rotation count.  wheel speed is the actual speed of the wheel
> in kph.
>

In theory you could calculate wheel speed from the wheel tick if you
knew the circumference of the wheel... but we don't include that data.
So yes, I think wheel speed could be useful.

[ALO] I would even say that wheel tick has no other usage than computing the rotation speed of each wheel, of course we need the circumference of the wheel, but we have the wheel radius (WheelConfiguration.frontWheelRadius).
Anyway, we should speak about this interface :
- Should it be zonalble ?
- What is the meaning of wheelInfoRadius ?
Another point is that " the actual speed of the wheel" is subject to interpretation, is it the speed of the wheel from the ground (then the speed of the vehicle) or is it the rotation speed of the wheel (then computed from wheel tick sensors) ?
My position is that this new interface for the actual speed of the wheel is not needed and not desirable (from my point of view, but I'm open to ear other arguments). Of course, considering that we keep the interface for WheelTickSensor.

>
>
> Ignition On Time - time ignition came on
> Ignition Off Time - time ignition went off
>
>
> Would this be a timestamp (DOMTimestamp)?
>
>
> I think so.
>
>
> Yawrate - yawrate
>
>
> In addition to these, I would like to add the following:
>
> DrivingMode - This abstract attribute uses things like speed and gear
> (and possibly other attributes) to convey whether or not the system is
> safe to use by the driver.  Use case would be if the developer wants
> to disable certain functions in the app in order to prevent the driver
> from being distracted.
>
> NightMode - Abstract property that uses one or more sensors to convey
> to the app whether or not it's night time or not.  Use case would be
> to change the UI theme of the app if it is night time.
>
> We are also curiously missing button events for the steering wheel, etc.
>
>

Received on Tuesday, 8 July 2014 07:02:52 UTC

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