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Model S Speedometer/Energy consumption scales

Discussion in 'Model S: User Interface' started by proberge, Apr 1, 2014.

  1. proberge

    proberge New Member

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    I am not a Tesla owner yet but being a User Experience Designer I could not help but notice that Tesla is using "unconventionnal" scales for the speedometer and the energy consumption indicator.As I finished writing my thoughts on this subject (http://www.pierreroberge.com/new-blog/2014/3/20/thoughts-on-tesla-model-...), Tesla has just released version 5.9 that seems to fix the non-linear Speedometer scale while leaving untouched the arguably less conventional Energy consumption scales.I would be very interested in hearing the opinion of Tesla owners on this.Thanks a lot!
     
  2. Shumdit

    Shumdit Member

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    #2 Shumdit, Apr 1, 2014
    Last edited: Apr 1, 2014

    The speedometer no longer looks like that as of 5.9 on the software as ou mentioned. Do the same "issues" apply? I don't know because the huge white numbers are what I look at when I am deteriming if the popo is about to pay me a visit. In any case the presentation of your blog is very nice.
     
  3. pgiralt

    pgiralt Active Member

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    I totally disagree with your assessment of how the energy meter should behave. As you haven't driven the car, I can understand why you might think your approach is better, but if you actually drive the car, you will see that the way the meter is currently design makes a lot of sense. You spend much of your time around 40 kW, so if you actually had the display go up in 60 kW increments like you propose, you'd hardly ever see anything on the graph. If you are trying to get good range, you typically try to keep things below 40 which would be very hard to do with your design as it's hard to tell where 40 is. Also, the time I use the energy graph the most is actually when doing regen braking and I want to see high precision near the zero mark as well as the range of regen. This is far more important information than if I'm using 120 kW or 240 kW. If I'm using more than 100 kW, it's probably because I'm flooring it and I don't care what the energy usage actually is (and I'm probably not even looking at the display anyway). I would suggest going on a test drive at your nearest Tesla store to experience yourself.
     
  4. Kraken

    Kraken Member

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    As for the speedometer, the original attempt appeared to highlight the range that most driving will take place by making that area more spread out. Then it showed the speed at the top end, but more condensed. After 5.9, we now have a lot of top end that is never used (and actually unusable). It was better the old way. You don't need the speedometer to see acceleration in this car ;).

    A similar (but opposite) concept is used in a lot of airspeed indicators in aircraft. Spread the scale out at the most important range of speeds so you can see it.

    plus, I doubt anyone looks at the bar for speed anyway. The bar for power is way more helpful.


    Power = mass *acceleration * velocity = mass * time * acceleration ^2
    Because it increases at a squared rate they put the power on a scale that could show it linearly by having the scale increase at a squared rate. Also, and I can't figure out the math, but if you dug far enough into it you probably would be able to figure out acceleration by watching that graph because it has been put on that scale. Further, since power = mav! as velocity increases more power will be necessary to get the same acceleration. Having it on this scale allows you to see both a similar rate of change at both a high and low velocity.
     
  5. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    I don't see the reason for breaking the speedometer in 5.9. Logarithmic works just fine for me, and when I want to know the actual speed, I look at the big number. Hopefully, they won't mess with the power side.
     
  6. kendallpb

    kendallpb Model S: P 8061

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    Anyone have a picture of 5.9's speedometer? I'm not super-clear on the difference; if it's linear now, does it go up to as high a speed, and does this mean that it's tougher to see the speed from the "dial"? Granted, I look at the actual number (but it's tough to stop paying attention to the "dial" on the left, even though I know it's redundant). If I understand this right, it does sound silly. (And another thing that should be an option.)
     
  7. JohnQ

    JohnQ Active Member

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    There's one in the 5.9 firmware thread. Goes up to 140 (not sure if that's variant dependent ... P vs 85 vs 60) and is a linear scale.
     
  8. kendallpb

    kendallpb Model S: P 8061

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    Ah, thanks--found it. Very silly (what they did), IMHO. Oh well.
     
  9. Ugliest1

    Ugliest1 S85: "Sparky"

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    I'll just comment on one thing - I almost never look at the blue speedometer graph - it takes longer to interpret (just as it does on any ICE car) than just reading the numbers directly. I think for speed, the number display is important, not the graph.
     
  10. ElSupreme

    ElSupreme Model S 03182

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    I always used 'straight up' as a cruising speed on the interstate in my other vehicles. So 80 in my Jetta, or 90 in my GTI. :biggrin: It was much faster than trying to get a 'number' and compare it to the much lower numbers on the big white signs on the side of the road!

    The Tesla broke my convention, because I have been unable to have the speedo point directly up. I also just look at the very large numeral display, and ignore the fake dial on the left.
     
  11. Gizmotoy

    Gizmotoy Active Member

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    For speed, a linear scale makes sense. For power, it does not. You spend 90% of your driving under 30-40 kW with spikes up to 320kW. Logarithmic is the way to go.
     
  12. tom66

    tom66 Member

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    Anybody got a picture of the scale change in the 5.9 update?
     
  13. Kalud

    Kalud Member

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    US version in MPH

    attachment.php?attachmentid=45806&d=1395810938.jpg

    Metric version
    attachment.php?attachmentid=45834&stc=1&d=1395830307.jpg
     
  14. Kraken

    Kraken Member

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    Well I spend 90% of my driving under 75-80 mph with spikes up to 140mph... I'm missing the difference. Bring back the logarithmic!
     
  15. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    At least it should be a setting.
     
  16. Liz G

    Liz G P03056

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    I like the pretty blue bar. It adds symmetry to the display. But I never actually look at it. Numbers in the middle are much easier to quickly interpret.

    Concerning the energy meter. I agree with those who say keep it the way it is. On long trips I need to keep below 20kW to make range. So I need the granularity the current meter offers.
     
  17. caddieo

    caddieo Member

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    Ditto. If I'm running at 78, I know I'm running 78 and I don't have to interpret the relationship between the blue bar and 70 or 80.
     
  18. RAM_Eh

    RAM_Eh Member

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    I stopped reading the article once he sated he has never driven a Tesla. I don't see the any "problems" with the displays.
     
  19. Kalud

    Kalud Member

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    I think it's a bit rude... The guy is a UI designer and did a quite interesting analysis. He quite frankly has a point.
     

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