From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: IoT / IIoT stuff
Date: Sat, 23 Jan 2016 09:05:35 +0100
Date: 2016-01-23T09:05:35+01:00 [thread overview]
Message-ID: <n7vc8u$1qj$1@gioia.aioe.org> (raw)
In-Reply-To: n7tu6g$1dsb$1@gioia.aioe.org
On 2016-01-22 19:59, tmoran@acm.org wrote:
>> This is not how automation applications are designed and are required to
>> be, as they know exactly where devices are and which sensors and
>> actuators they have.
> Lots of cheap sensors and actuators implies designing for unreliable, but
> multiply redundant, sets of devices.
How can you build a redundant system without knowing what is there,
being redundant or not?
The point is that any automation system always deals with some physical
real life process. The inputs and outputs are mapped onto some physical
entities. A sensor is there to measure a concrete entity of the process.
You can use many sensors to measure the same entity in a redundant
manner or you can have subsystems dormant when some measurements are
unavailable, but you always know what you measure and what you control.
A sensor in a "cloud" without reference to the process at hand has no use.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2016-01-23 8:05 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-21 13:25 IoT / IIoT stuff slos
2016-01-21 14:36 ` Dmitry A. Kazakov
2016-01-22 15:24 ` slos
2016-01-22 15:43 ` Dmitry A. Kazakov
2016-01-22 18:59 ` tmoran
2016-01-23 2:19 ` Dennis Lee Bieber
2016-01-23 8:05 ` Dmitry A. Kazakov [this message]
2016-01-22 20:23 ` Georg Bauhaus
2016-01-22 22:12 ` slos
2016-01-22 11:48 ` Maciej Sobczak
2016-01-22 22:26 ` slos
2016-01-27 5:18 ` Per Sandberg
2016-01-27 16:31 ` slos
2016-01-31 7:46 ` slos
2016-01-31 9:57 ` tonyg
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