`
`«» UK Patent Application «=» GB «») 2225 459..A
`
`(43) Date of A publication 30.05.1990
`
` (21) Application No 8824224.3
`
`(51)
`INT CL*
`GO6F 15/74
` (22) Date offiling 17.10.1988
`
`
`(71) Applicant
`Andrew Stephen Holder
`43 Russell Street, Wilton, Salisbury, Wiltshire,
`
`SP2 OBG, United Kingdom
`
`
`(74) Agent and/or Address for Service
`Andrew Stephen Holder
`43 Russell Street, Wilton, Salisbury, Wiltshire,
`
`SP2 OBG,United Kingdom
`
`
`(72)
`
`Inventor
`Andrew Stephen Holder
`
`
`
`(52) UK CL(Edition J)
`G4A AUX
`U1S $1057
`
`
`
`(&6) Documentscited
`E&P0189204 A2 EP 0157477 A1
`EP 0206470 A1
`EP 0122666 A2 WO 85/03586 A1 US 4646241 A
`
`(58) Field of search
`UK CL (Edition J) G4A AKBX AUX
`INT CL‘ GO6F
`Online Database: WPi
`
`(54) Event recorder
`
`(57) A data recorder capable of capturing transient events, of partricular use in detecting the changing situation just before
`the onset of Apnoea and Oxygen deficiency in infants. Both analogue and digital data are input to a microprocessorchip 1
`and analysed. Also data from a real time clock 5 are input to the microprocessorin order that the date and time of any
`event recorded can be established. The data are stored sequentially in random access memory (RAM)in the form of a
`removeable "credit card” sized cartridge 7. When the cartridge is full the new data overwrite the oldest data ensuring that
`the most recent period is retained. When an event happenson any attached equipment the recorderis triggered into
`shutting down, e.g. after a preset interval. The RAM cartridge can then be removed andbyinputting the data to a computer
`the period surrounding the event can be studied.,
`
`anaiogu
`mput toa}
`
`4)
`
` digrta.
`
`input Microprocessor
`
`“AWEwo
`
`Input port
`. Ato D converter
`. Input port
`- Real
`time clock
`. Read only memory
`. Memory carc
`
`FIG 1 Schematic qagren:
`
`The claims werefiled later than thefiling date within the period prescribed by Rule 25/1) of the Patents Rules 1982
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`3
`
`analogue
`input
`
`digital”
`
`ye
`
`SOURwh=
`
`. Microprocessor
`_ Input port
`. Ato D converter
`. Input port
`. Real
`time clock
`. Read only memory
`Memory card
`
`FIG.4 Schematic diagram
`
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`Specification.
`
`EVENT. RECORDER.
`
`9225459
`
`invention is concerned with the problem of recording the
`The
`changing situation just before the onset of Apnoea and Oxygen
`deficiency in infants.
`records data continuously on
`A
`system is
`known which
`this
`system is
`that
`it
`of
`magnetic tape.
`The
`drawback
`produces
`copious
`amounts of data relating,
`in general, toa
`completely normal situation in order to pick up what may be a
`brief and infrequent event.
`The present
`invention is designed to record only the data
`relevant to a specific event occuring.
`is battery or
`The invention is an event recorder which
`mains
`powered
`and
`suitable for recording data from either
`analaque or digital
`sources
`such
`as
`temperature
`sensors,
`respiration transducers, oxygen monitors, etc.
`form,
`Digital data are input
`in either serial or parallel
`under software control,
`through
`an
`input port
`2
`into a
`microprocessor i.
`through an analogue to digital
`input
`are
`Analogue data
`converter =, which may be either
`a
`separate
`component
`or
`incorporated in the microprocessor 1,
`through an input port 4
`into the said microprocessor i.
`Data from a real
`time clock 5 are also input to the
`microprocessor i.
`The data are analysed in the microprocessor i by software
`related specifically to the task,
`such
`as
`comparison with
`preset alarm limits or statistical trends.
`The
`software
`for controlling the inputs, analysing and
`storing the data is contained in read only memory 6.
`After such analysis,
`the data are stored sequentially in
`area
`of non-volatile random access memory which
`is
`an
`contained in a removable cartridge or "credit card"
`type
`of
`menory card 7.
`clock data are also stored alongside the
`time
`The
`real
`thus "time stamping” the data.
`data for analysis,
`aside
`set
`On area of the random access memory card 7 is
`storage
`of
`parameters
`relating to the data, i.e. data
`for
`sampling rate, size of memory block, patient name and address
`in the case of medical recording.
`The operating software contained in the read only memory
`
`& of the system can interact with the parameters stored=on
`the
`removable memory
`card 7. This enables the operation of
`the unit to be changed
`by
`simply
`introducing a different
`memory card rather than making major changes to the read oniy
`mamoary & or the system itself.
`When the memory card 7 is filled,
`the data
`continues
`to
`stored from the beginning, overwriting the oldest data.
`be
`The position of the most recently stored data
`is
`kept
`by
`means
`of
`a
`software
`"pointer" which is alsa stored on the
`memory card 7.
`can
`This storage process is continuous and by its nature
`thought
`of
`as circular in effect. The data immediately
`be
`behind the software pointer is the newest data while the data
`immediately ahead of the software pointer is the oldest data.
`
`same
`
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`When an event is detected such as crossing a preset alarm
`threshold,
`the software
`instructs
`the microprocessor i to
`stop the storage process, Bither
`immediately or after
`a
`preset time limit.
`
`The memory card 7 can then be disconnected and contains:-
`
`the period immediately preceding the detected
`for
`Data
`event stored in sequential
`form.
`
`A pointer showing where said data begins.
`
`Feriodic clock data showing when the event occurred in real
`time.
`
`card 7 can then be connected ta a remotely sited
`The memory
`included in this specification)
`and
`the data
`computer
`(not
`extracted for analysis.
`
`G@ll numbers in the text relate to drawing Fig.1i
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`CLAIMS
`
`is capable of accepting
`recorder which
`event
`An
`1.
`input of analogue and digital data
`from a variety of
`sensors or transducers in serial or parallel form.
`
`in claim 1
`claimed
`as
`recorder
`event
`An
`2.
`converter
`and
`to digital
`analogue
`incorporating an
`be in the same
`microprocessor which may or may not
`component for
`the
`purpose of
`analysing the data as
`claimed in claim l.
`
`in claims 1 and 2
`claimed
`as
`recorder
`event
`An
`3.
`the
`purpose of
`clock
`for
`real
`time
`incorporating a
`supplying data to the microprocessor as claimed in claim
`2 so that the data as claimed in claim 1 may be studied
`with reference to the time they were recorded.
`
`2 and 3
`in claims 1,
`as claimed
`event recorder
`4. An
`for
`the
`purpose of
`incorporating a Read Only Memory
`holding the program governing the operation of the whole
`equipment.
`
`in claims 1,2,3 and 4
`5. An event recorder as claimed
`incorporating a non-volatile Random Access Memory in the
`form of
`a
`removeable cartridge
`for
`the
`purpose of
`storing the data as claimed in claims 1 and 3.
`
`event recorder substantially as described herein
`6. An
`with reference to Figure 1 of the accompanying drawing.
`
`- Published1990atThePatentOffice,StateHouse,66/71HighHolborn,LondonWC1R4TP,FurthercopiesmetROOTAOBoe
`Sales Branch, St Mary Cray, Orpington, Kent BR5 SRD. Printed by Multiplex techniquesIta, St
`ary Cray, Kent,
`»
`Le
`-
`oo
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