`
`UK Patent Application
`
`GB In 2 225 459.3,A
`
`(43) Date of A publication 3005.1990
`
`GoeF 15/74
`
`(52) UK CL (Edition J)
`G4A AUX
`
`U13 S1057
`
`
`(21) Application No 8824224.3
`
` (51) WT CL‘
` (22) Date of filing 17.10.1988
`
`(71) Applicant
`
`Andrew Stephen Holder
`43 Russell Street, Wilton, Salisbury, Wiltshlre,
`SP2 086, United Kingdom
`
`
`(74) Agent and/or Address for Service
`
`Andrew Stephen Holder
`43 Russell Street, Wilton, Salisbury, Wiltshlre,
`
`
`SP2 036, United Kingdom
`
`
`
`(72)
`
`inventor
`Andrew Stephen Holder
`
`
`
`(56) Documents cited
`EP 0189204 A2 EP 0157477 A1
`EP 0206470 A1
`EP 0122866 A2 WO 85/03586 A1 US 4646241 A
`
`(58) Field of search
`UK CL (Edition J) G4A AKBX AUX
`INT CL‘ GOSF
`Online Database: WPl
`
`(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 microprocessor chip 1
`and analysed. Also data from a real time clock 5 are input to the microprocessor in 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 ovenNrite the oldest data ensuring that
`the most recent period is retained. When an event happens on any attached equipment the recorder is triggered into
`shutting down e. 9. after a preset interval. The RAM cartridge can then be removed and by inputting the data to a computer
`the period surrounding the event can be studied,
`
`anaiogug
`mput%
`
`dIgrta.
`Inpu.‘
`
`
`
`FIG 1 Schematic diagram
`
`HIcroprotessor
`input port
`.Atc D converter
`. Input port
`.Reul time clotk
`Read only memory
`Memory card
`
`F'IU‘U'Imeg
`
`The claims were filed later than the filing date within the period prescribed by Rule 25(1) of the Patents Rules 1982
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`analogue
`input
`
`3
`
`digiial
`
`inpr
`
`1 .I
`
`i. Microprocessor
`2. Input por’r
`
`3. Afo D converter
`
`4. Input port
`'5. Real Time clock
`6. Read only memory
`7. Memory card
`
`F161 Schemafic diagram
`
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`2225459
`
`Saseiiisation:
`
`EYENIWBEQQREEE:
`
`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
`Q
`system is
`known which
`this
`system is
`that
`it
`of
`magnetic tape.
`The
`drawback
`produces
`copious
`amounts of data relating,
`in general, to a
`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.
`The invention is an event recorder which
`
`is battery or
`
`suitable for recording data from either
`and
`powered
`mains
`sources
`such
`as
`temperature
`sensors.
`analogue or digital
`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 1.
`through an analogue to digital
`input
`are
`analogue data
`converter 3, which may be either
`a
`separate
`component
`or
`incorporated in the microprocessor 1.
`through an input port 4
`into the said microprocessor 1.
`Data from a real
`time clock 5 are also input to the
`
`same
`
`microprocessor 1.
`The data are analysed in the microprocessor l 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
`memory card ?.
`clock data are also stored alongside the
`time
`The
`real
`thus "time stamping" the data.
`data for analysis.
`aside
`set
`An 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
`6 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 maliing major changes to the read only
`memory a or the system itself.
`to
`continues
`the data
`when the memory card 7 is filled,
`stored from the beginning, oxerwriting the oldest data.
`be
`The position of the most recently stored data
`is
`kept
`by
`means
`of
`a
`software
`"pointer" which is also stored on the
`.1
`memory card /.
`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.
`
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`When an event is detected such as crossing a preset alarm
`threshold,
`the software
`instructs
`the microprocessor 1 to
`stop the storage process,
`either
`immediately or after
`a
`preset time limit.
`
`The memory card 7 can then be disconnected and contains:—
`
`the period immediately preceding the detected
`tor
`Data
`event stored in sequential
`form.
`
`A pointer showing where said data begins.
`
`Periodic clock data showing when the event occurred in real
`time.
`
`card 7 can then be connected to a remotely sited
`The memory
`included in this specification)
`and
`the data
`computer
`(not
`extracted for analysis.
`
`#11 numbers in the text relate to drawing Fig.1
`
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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 1.
`
`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 l of the accompanying drawing.
`
`
`, Published 1990”ThePatentOflice.StateHouse.6617]. nghHolborn.LondonWCIR41?.FurthercopiesmigfpmwWee.
`Sales Branch. St Mary Cray. Orpmgbom Kent, BR5 33D: Printed by Multiplex techniques ltd, St. my my,
`e t.
`.
`7
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