參數(shù)資料
型號(hào)： TSPCOS
英文描述： TREND SERVER PROG MULTI
中文描述： 多服務(wù)器PROG趨勢(shì)
文件頁數(shù)： 91/104頁
文件大?。?/td> 3878K
代理商： TSPCOS
43-TV-25-11 GLO Issue 11 03/02 UK
83
Sounds Great! But what about ‘Spikes’ on my trend line.
Won’t it miss them
NO,
you will not miss any ‘Spikes’, ‘Glitches’ or ‘Transients’ – these are what you
need to see!
As Fuzzy Logging is an adaptive technique, it will log as fast as it needs to in order to
capture everything.
Although not all points are logged, the base ‘Scan Rate’ of the input is the same as if
you were using a standard logging technique.
OK, but what about slowly drifting inputs
Again –
No Problem
. The algorithm is processed in ‘Real Time’, i.e. as the reading is
taken. As it already knows the previous logged readings it can calculate where the next
point should be (assuming it’s on a straight line) – if the measured value does not equal
the predicted value, the point is logged as it no longer forms part of the straight line.
Fuzzy Logging, looks for straight lines –
at any angle.
Not just on the horizontal.
I’m convinced. Do you have any examples
Example 1.) Flow & Pressure Measurement of Mains Water Pressure
A recorder was installed, to monitor the flow of a mains water supply. At peak
demand the mains pressure had been subject to sharp drops in pressure and flow rate,
and it was necessary to find the cause of the problem.
@ " A B:
@ #"22%
2:
A fast scan rate using the standard sampling method would result in a disk life of
about a day, which was not acceptable.
As this application consists of long periods of little activity (relatively constant flow
rate), and short periods of high activity (rapidly changing flow rate), it is an ideally suited
to Fuzzy Logging.
During the hours of stable flow where the flow rate remained more or less constant,
the Fuzzy Logging technique would give compression ratios up to 100 times. However,
as soon as a glitch appeared the fast sampling rate was able to capture and store all the
points.
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