Comments on: Human Interface Computer (HIC) White Paper and Requirements http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/ SSM - the Home of the Open Source Green Vehicle (OSGV) Project Thu, 09 Sep 2010 14:16:47 +0000 http://wordpress.org/?v=2.1.3 By: David Lee http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-6 David Lee Tue, 12 Jun 2007 05:56:48 +0000 http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-6 I am hoping that somebody will take the ownership of the item and develop the idea further. The interface (mechanical and electrical) should be straight forward enough for a rather independent group. I know there are plenty of Car PCs out there - but we need to identify a cheaper solution - instead of costing $1000+, it has to be built for $300 or so... Some people on Mp3Car.com have some homebrew double-DIN chassis with mini-ITX PC in it. Pretty cool. I think we could adapt it to fit. Anyway, please note that the requirements are written such it is not platform-specific. So, other solutions might work as well. Good luck. I am hoping that somebody will take the ownership of the item and develop the idea further. The interface (mechanical and electrical) should be straight forward enough for a rather independent group.

I know there are plenty of Car PCs out there - but we need to identify a cheaper solution - instead of costing $1000+, it has to be built for $300 or so…

Some people on Mp3Car.com have some homebrew double-DIN chassis with mini-ITX PC in it. Pretty cool. I think we could adapt it to fit.

Anyway, please note that the requirements are written such it is not platform-specific. So, other solutions might work as well.

Good luck.

]]> By: David Lee http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-7 David Lee Tue, 12 Jun 2007 06:02:56 +0000 http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-7 In addition, the requirements above will be turned into a source control specification - according to our open design license. Please provide links to possible vendors (if any). In addition, the requirements above will be turned into a source control specification - according to our open design license.

Please provide links to possible vendors (if any).

]]> By: motosaurus http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-8 motosaurus Tue, 12 Jun 2007 18:05:08 +0000 http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-8 Very complete David, good job. Since the vehicle is pretty much certain to have large electric motor(s) and therefore some heavy current flow ( DIY BEVs run 500 amps at 144V as a matter of course), perhaps there should be a placeholder for magnetic/RF shielding beyond the usual consumer/gas-auto level? (I have no idea what level of RF a BEV controller puts out, but I'll ask) John Very complete David, good job.
Since the vehicle is pretty much certain to have large electric motor(s) and therefore some heavy current flow ( DIY BEVs run 500 amps at 144V as a matter of course), perhaps there should be a placeholder for magnetic/RF shielding beyond the usual consumer/gas-auto level? (I have no idea what level of RF a BEV controller puts out, but I’ll ask)

John

]]> By: David Lee http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-9 David Lee Tue, 12 Jun 2007 20:23:52 +0000 http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-9 The vehicle will max out at 400A at 450V. The 450V power rail is separated from the 12V utility power rail with a DC-DC converter. Switching frequency is no less than 2kHz so it should be fairly stable. EMI is currently unknown as it is highly dependent on the type of high-power components we use. But the idea is to isolate the conducted and radiated EMI at the source (so you don't have to shield everything else - which might increase cost). e.g. the motor will have ground shielding and inline EMI filters on the power lines. Very good point indeed. I will add that to the requirements. The vehicle will max out at 400A at 450V. The 450V power rail is separated from the 12V utility power rail with a DC-DC converter. Switching frequency is no less than 2kHz so it should be fairly stable. EMI is currently unknown as it is highly dependent on the type of high-power components we use.

But the idea is to isolate the conducted and radiated EMI at the source (so you don’t have to shield everything else - which might increase cost). e.g. the motor will have ground shielding and inline EMI filters on the power lines.

Very good point indeed. I will add that to the requirements.

]]> By: David Lee http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-10 David Lee Tue, 12 Jun 2007 20:26:42 +0000 http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-10 FYI, this site seems to have a list of these in-dash computers... http://www.carputers.org/ Hope this helps. FYI, this site seems to have a list of these in-dash computers…
http://www.carputers.org/
Hope this helps.

]]> By: JeffreyBeauchamp http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-17 JeffreyBeauchamp Sun, 19 Aug 2007 13:33:44 +0000 http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-17 The requirement that all user-functionality of the HIC shall be touch-screen enabled poses a safety hazard. The driver would have to scan the screen to locate a command button, which would take attention away from the task of driving. I would propose standard media commands (Stop, Play/Pause, Forward, Back, Eject) be implemented via front panel controls with relief patterns on buttons so their functions could be recognized by touch. I realize the requirements state that mechanical switches and buttons may be used to supplement the touch screen; however, if it flashes on the screen, that's where the driver is likely to look first. I have read in various postings that drivers have been distracted by the Toyota Prius power flow readout; making the touch screen mandatory just sounds dangerous. There will also be a need to switch between active devices (phone, MP3, CD, etc.). I would propose that this also be implemented via a front panel control. Some diagnostic information (such as remaining battery power) should likely be considered a requirement for the instrument panel, so the driver would not be required to direct attention to the HIC while driving. The requirement that all user-functionality of the HIC shall be touch-screen enabled poses a safety hazard. The driver would have to scan the screen to locate a command button, which would take attention away from the task of driving. I would propose standard media commands (Stop, Play/Pause, Forward, Back, Eject) be implemented via front panel controls with relief patterns on buttons so their functions could be recognized by touch. I realize the requirements state that mechanical switches and buttons may be used to supplement the touch screen; however, if it flashes on the screen, that’s where the driver is likely to look first. I have read in various postings that drivers have been distracted by the Toyota Prius power flow readout; making the touch screen mandatory just sounds dangerous. There will also be a need to switch between active devices (phone, MP3, CD, etc.). I would propose that this also be implemented via a front panel control. Some diagnostic information (such as remaining battery power) should likely be considered a requirement for the instrument panel, so the driver would not be required to direct attention to the HIC while driving.

]]> By: David Lee http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-19 David Lee Tue, 04 Sep 2007 05:47:08 +0000 http://www.osgv.org/2007/06/11/human-interface-computer-hic-white-paper-and-requirements/#comment-19 We've moved our discussions here: http://www.osgv.org/nfphpbb/viewtopic.php?p=677#677 We’ve moved our discussions here:

http://www.osgv.org/nfphpbb/viewtopic.php?p=677#677

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