Steve Hayes scribbled something on Thursday the 9/4/2014:
> On Fri, 05 Sep 2014 13:22:57 +0800, Iskandar Baharuddin
> <
bren...@iinet.net.au> wrote:
>
>> On 05/09/14 12:59 PM, Steve Hayes wrote:
>>> On Fri, 05 Sep 2014 08:13:37 +0800, Robert Bannister <
rob...@clubtelco.com>
>>> wrote:
>>>
>>>> On 5/09/2014 2:03 am,
j...@mdfs.net wrote:
>>>>> Tony Cooper wrote:
>>>>>> something like "See that guy over there in the Speedo?".
>>>>>
>>>>> That sounds like he's in some sort of sports car.
>>>>
>>>> With cars, the "speedo" has always been the speedometer or even, rarely,
>>>> the tachometer.
>>>
>>> I thought the tachometer had a recording device in it, so the boss could
>>> tell how fast you were going when the accident occurred.
>>>
>> That is a tachograph.
>
> Yes, I realised that just after I'd posted it.
>
> It was just that I hadn't heard the word "tachometer" before, only
> "tachograph", but so long ago that that is what I thought it must be
> referring to.
To me, tachometer only describes how often the pistons are bouncing.
Ok, indirectly, because it is the RPM of the crankshaft. But the
tachometer can be showing a very high rate of activity when the car is
standing still.
The main computer of many cars these days has "black box" capabilites,
although it might not be in an orange case. Speed, throttle settings,
brake pressure, wheel slip sensors, air temperature, and more available
to the insurance company adjuster.
One of the Insurance Companies Over Here has a product called
"Snapshot" which helps you prove you are as careful a driver as you say
you are, and so reduce your rates. I don't know whether it merely
makes a duplicate record of the same things the main computer is
recording, or whether it has independent ways of measuring (inertial
acceleration sensors, GPS, or counts the number of wi-fi access ports
in range per second).
Your smart phone also has accelerometers that can provide interesting
information, even your GPS is off (which is not fully true in these
days of cellular emergency calls (9-1-1 in the US, with special
requirements applied to mobile devices)).
/dps
--
But happiness cannot be pursued; it must ensue. One must have a reason
to 'be happy.'"
Viktor Frankl