Or my 80 meter mobile installation that could shut down simple transistorized ignition systems... what could it do to a drive-by-wire vehicle that used CAN-bus for everything?
Not a moot point when even airplanes are tending that way. Cortland KA5S > [Original Message] > From: John Woodgate <j...@jmwa.demon.co.uk> > To: <EMC-PSTC@LISTSERV.IEEE.ORG> > Date: 2/6/2010 5:52:12 AM > Subject: Re: Agency Probes Gas Pedals' Link to EMI > > In message <c7927e83.658c2%ken.ja...@emccompliance.com>, dated Sat, 6 > Feb 2010, Ken Javor <ken.ja...@emccompliance.com> writes: > > >But that's like saying, yes it is possible that it will rain in Death > >Valley, when inquiring if damage to a domicile might have been caused > >by a hurricane. > > I was pointing out that the question demanded such a response and was > therefore not the right question. > > > >The real question, given present automotive EMI standards, is "What is > >the probability that a real world threat exceeded the stress levels > >imposed during radiated susceptibility qualification (which runs 100 > >V/m or higher to my knowledge)?" > > Yes, that's close enough to the right question. > > I'm not familiar with the European requirements, which are embodied in > the Automotive Directive, not in standards. But I understand that they > are very stringent. A few significant problems were experienced prior to > the Directive, some involving rural roads exposed to very high RF field > strengths from nearby broadcast transmitters. > > Nevertheless, no amount of testing, however stringent and > well-implemented, can foresee all possibilities, because the > micro-environment in the vehicle can be affected by the owner. For > example, a metal box without a lid might act as a resonant cavity and > produce a local highly-intensified field strength close to an > electronics box hidden behind a side panel of the vehicle interior. > -- > - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@socal.rr.com> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
