CN102822682B - Signal Measurement System, the method for conductivity signal and signal cable - Google Patents
Signal Measurement System, the method for conductivity signal and signal cable Download PDFInfo
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- CN102822682B CN102822682B CN201180017323.6A CN201180017323A CN102822682B CN 102822682 B CN102822682 B CN 102822682B CN 201180017323 A CN201180017323 A CN 201180017323A CN 102822682 B CN102822682 B CN 102822682B
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Abstract
The present invention relates to the Signal Measurement System (100 for measuring signal, 200,300), described system includes the signal detection system (41) for detecting primary signal, signal processing unit (42) and the signal cable (10) making described detecting signal unit (41) electrically connect with described signal processing unit (42).Described signal cable (10) includes the signal conductor (1 for the first signal is directed at described signal processing unit (42) from described detecting signal unit (41) fax, 2), described first signal at least includes primary signal, described signal cable also includes reference conductor (11,23), it is only used for detecting the noise signal by the movement of described signal cable (10) or induced by electromagnetic interference and its fax being directed at described signal processing unit (42).In this way, reduce the noise impact on signal quality, will not improve again power to use or power attenuation, described noise is that the noise source of the movement by signal cable (10) or other such as electromagnetic interference inducing noise signal in signal cable (10) causes simultaneously.
Description
Technical field
The present invention relates to Signal Measurement System, the method for conductivity signal and signal cable.
Background technology
Signal cable is used to be sent to such as from the source of such as detector, sensor or microphone by signal
Signal processing unit or the load of prime amplifier.Described signal cable allows for not adding to signal
In the case of any interference or noise transmit signal because interference or noise may change signal amplitude,
Frequency or any other characteristic.In other words, signal and characteristic thereof in one end of signal cable input should
When identical with signal and the characteristic thereof exported in the opposite end of signal cable.
Signal in signal cable may add one of noise source in the middle of signal to during transmitting
Franklinic electricity.Triboelectric effect is that a kind of material may become charged because rubbing or clipping on another material
Electrical phenomena.Owing to signal cable is handled or owing to being connected with signal cable by (such as)
Source or moving of load and the movement of signal cable that causes will cause the mechanical stress of signal cable, example
As, bending, compress or stretch, it will affect the interior geometry of signal cable.This may be at letter
Causing triboelectric effect in number cable, under this effect, will produce electric charge, this electric charge will be original
Producing extra interference signal on signal, it may have appreciable impact to the signal to noise ratio of primary signal.
Another noise source is between each bar wire in cable, between wire and shielding part or leads
The change of the coupling capacitance between line and the surrounding of cable.The capacitance of change can result in electricity
Lotus, thus add noise to primary signal.Another noise source is the wire caused owing to cable moves
Or the resistance variations of shielding part.And, motion or acceleration the pcrmeability of the insulating material caused
Or the change of susceptibility is likely to increase noise to primary signal.Additionally, the movement of cable can be relative
Changing its position in surrounding, and change pcrmeability or susceptibility in this way, it equally can
Noise is increased to primary signal.In addition to the noise generated because cable moves, other sources are likely to
The signal in signal cable is affected because introducing extra noise, such as, electromagnetic interference.
Such as, when monitoring the physiological signal of patient, it is important that obtain at patient monitor outfan
Original physiologic signal.Any movement of the signal cable used in this patient-monitoring all will be at signal
Cable causes and is admixed or added to noise signal therein with original physiologic signal, thus affect original
The signal to noise ratio of physiological signal.The most just adorn oneself with such as full for measuring the pulse oxygen of blood oxygen saturation
For the mobile patient of the bio-signal acquisition unit of degree instrument, signal cable is such as bent, is drawn
The effect of the movement stretched, thus in the signal cable be attached to detecting signal unit, induce franklinic electricity effect
Should or other effects, and then add noise to primary signal.Supervision for these not immobilized patients
For, the little mobile monitoring system of such as pulse oximeter device is operated by small and light battery
System, described battery needs low-power to use, thus improves the life-span of battery.
US 2007/0252606A1 discloses the triaxle cable used in a kind of semiconductor testing apparatus.Institute
State triaxle cable and include central signal conductor, surveyed to shielding probe transmission from test equipment by this conductor
Trial signal.Described central signal conductor by the first dielectric layer around, and the first dielectric layer is led
Electrocoat or dispersive layer are surrounded.Described conductive coating or dispersive layer are clipped in the first dielectric layer and conduction is anti-
Between sheath, to reduce triboelectric effect.In test operation, described overcoat is driven into and institute
State on the electromotive force that central signal conductor is identical, thus eliminate described overcoat and described central stratum conductor it
Between electric capacity.Correspondingly, parasitic capacitance is eliminated.The design of this cable effectively reduces franklinic electricity
Effect, thus improve the power consumption of cable.
US 2005/0277826 A1 describes a kind of equipment for reducing interference.Holding wire and reference
Line being physically adjacent to the most nearly in its length.Subtraction block signal from holding wire subtracts
Remove the interference signal on reference line.
US 2004/0225210 A1 describes a kind of contact conductor collection assembly, goes between including state sensing
Go between with noise pickup.State sensing lead-in wire includes first pair of conductive path, and every conductive path all may be used
To be connected to an electrode, it is used for transmitting bioelectrical signals.Additionally, every conductive path all easily exists
Wherein induce the first noise signal.Noise pickup lead-in wire also includes second pair of conductive path, every conduction
One of conductive path that path goes between with state sensing in topology is directed at, with formed noise matching
Right.Second pair of conductive path induces noise the most wherein.
Oeltermann et al. (" Simultaneous recording of neuronal signals and
Functional NMR imaging ", Magnetic Resonance Imaging, Elsevier Science,
Vol.25, no.6,760-774 page) and EP 1 273922 A1 describe one and include that two are left electricity
The Disturbance Compensation System of the coaxial cable of pole folder.A piece cable is for transmission electrode signal, and another root is electric
Cable is for far disturbing sensor.
US 5569158 A describes a kind of shielding part structure for electronic endoscope device.Signal passes
Transmission cable includes coaxial line and holding wire, and they are surrounded by shielding part.
DE 34 31 994 A1 describes the noise suppressed for endoscope.Signal transmission module includes two
Root shielded cable, for sending picture signal to difference amplifier.Difference amplifier eliminates and is sent letter
Number in-phase component, thus suppress noise.
Jagannathan et al. (" Common-mode data transmission using the binder
Sheath in digital subscriber lines ", IEEE Transactions on Communications,
Vol.57, no.3,831-840 page) describe DSL transmission.The protective metal shell of DSL covering is used as public affairs
Reference altogether, to obtain the reliable passage for common-mode signal.
EP 0 739 602 A1 describes a kind of endoscopic apparatus.This equipment includes being made up of multiple conductors
Signal cable, each conductor is covered by secondary shielding part, to form coaxial cable, it is to avoid noise
Interference.Signal cable includes many described coaxial cables.
WO 2009/041723 A1 describes a kind of endoscope with signal cable, and signal cable includes
Multi-cable core.Cable core is shielded by shielding material.
US 4919114 A describes a kind of endoscope with signal cable.Signal cable includes many
Heart yearn and operation holding wire, every is all shielded by corresponding external conductor.
US 2006/0185886 A1 describes a kind of audio signal cable.This cable comprises at least two
Different types of conductor.
US 2002/0129968 A1 describes a kind of Electrical signal cable assembly.Its cable includes at least three
Root is with the wire of non-interwoven deployment arrangements.
US 4945189 A describes a kind of interconnecting cable for voice applications, sets including close to each other
The first and second conductors put and connect at end.The length of the second conductor is at least the three of the first conductor
Times.Additionally, the second conductor is helically wound around around the first conductor.
Summary of the invention
It is an object of the invention to reduce by the movement of signal cable or such as electromagnetic interference at signal
Cable induces the impact on signal quality of noise that other noise sources of noise signal cause, with this with
Time will not improve again power consumption or power loss.This purpose is by the signal measurement system according to the present invention
System realizes, and wherein, described system preferably includes:
-for detecting the detecting signal unit of primary signal,
-signal processing unit,
-for the signal cable making described detecting signal unit electrically connect with described signal processing unit,
Described signal cable includes:
-for the first signal is directed at described signal processing from described detecting signal unit fax
The signal conductor of unit, described first signal at least includes described primary signal；And
-reference conductor, is only used for detecting the movement by signal cable or electromagnetic interference induction
Noise signal, and its fax is directed at described signal processing unit.
Described signal cable conducts the signal of telecommunication of such as current signal, and by these signals from the one of cable
The opposite end of end transmission extremely described cable.Described signal cable one end is connected to signal source, i.e. signal
Detector unit, is connected to signal load by the opposite end of described signal cable, i.e. described signal processing
Unit.First signal of described signal conductor conduction at least includes that primary signal, described primary signal are
Detected by described detecting signal unit or measured, and be used for further signal processing and signal divides
Analysis.It is desirable that described first signal should not be restricted by sound pollution, thus only carry primary signal.But
Be, the most described first signal also include in addition to including primary signal by
(such as) noise signal that the movement of described cable or electromagnetic interference cause.Reference according to the present invention
Conductor provides the simple measurement to the noise signal caused by noise source, and such as, described noise source is
The movement of signal cable or the electromagnetic interference to reference conductor.In this way, it is possible to not
In the case of improving power consumption, noise signal is compensated, thus improve signal to noise ratio, such as, as one
Plant the mode substituted, signal to noise ratio can be improved by mentioning levels of current, and this mode will carry
High power consumption.When the reduction of required electrical power can also extend the work to the battery measuring system power supply
Between.Thereby, it is possible to reduce battery altering or the frequency of charging, it can make described measurement system more
Add actual, more economically friendly, and improve its practicality as mobile device.The mobile of cable will
Induction promotes triboelectric effect that noise signal generates etc. in the cable.Thus, can be by with reference to leading
Body obtains noise signal, thus uses it for the signal processing unit further process to signal.Described
Reference signal is able to detect that the movement of signal cable, because it was assumed that cable there occurs movement, such as,
Create bending or stretching, then will generate in reference conductor and be induced by (such as) triboelectric effect
Signal noise.Described reference conductor also will pick up other noise sources that also can be picked up by signal conductor,
Such as, electromagnetic interference.
Described measurement system, especially detecting signal unit are preferably battery-powered.Such as, institute
State detecting signal unit and can select the combination that freely following option is constituted: pulse oximeter, non-invade
Enter formula blood pressure detecting device (NIBP), temperature sensor, electroencephalograph (EEG), breathing rate detector,
Uterine contraction detector, fetal ultrasound ripple detector and electrocardiograph (ECG).Described signal detection list
Unit's preferably pulse oximeter.
In a preferred embodiment, described signal processing unit is suitable to from conducted by described signal conductor
The noise signal of one signal and the conduction of described reference conductor extracts described primary signal.The shifting of described cable
Move and not only can induce noise signal in reference conductor, also can induce noise signal in signal conductor.
Thus, it is described that the first signal in described signal conductor includes that composite signal, described composite signal include
Primary signal and described noise signal.By signal conductor, primary signal and the noise of described combination are believed
Number flow to signal processing unit, by reference conductor, described noise signal is individually flowed to described letter
Number processing unit.These inputs make signal processing unit can extract primary signal.Such as, pass through
Analog control circuit performs the compensation to noise signal.
In a preferred embodiment, described primary signal is the physiological signal of patient.In this embodiment,
Described Signal Measurement System is the physiological signal of the relevant patient that monitoring uses (such as) sensor to record
Patient monitoring system.Specifically, will be understood as suffering from because of monitored everyone of any reason
Person, such as, athlete, Healthy People, old man.The example of physiological signal be pulse, blood oxygen saturation,
Blood pressure, body temperature, the electrical activity (EEG) of neuron, breathing rate, uterine contraction (Toco), fetus surpass
The electrical activity (ECG) of sound wave and/or cardiac muscle.
In a preferred embodiment, the electricity of reference conductor and geometrical property and the electrical characteristics of signal conductor and several
What characteristic is similar to.In this embodiment, signal conductor and the electrical characteristics of reference conductor and geometrical property
The noise signal induced to make cable move as this two conductors internal phase mode and be similar to.Described letter
Difference number between conductor and sign electrical characteristics and the geometrical property of reference conductor should be insignificant,
So that the noise signal in two conductors shows good similarity, and there is insignificant difference.
The electrical characteristics of described conductor and geometrical property can pass through the size of (such as) conductor itself, conductor
Material and the size of any shielding part and material characterize.Preferably, by checking signal cable
Which conductor cross section will not distinguish is signal conductor, and which conductor is reference conductor.And use
Material in two conductors should be identical.In other words, electrical characteristics and the geometrical property of two conductors should
Show such similarity, so that the noise signal reflection being moved induction by cable of reference conductor
The noise signal being moved induction by cable in signal conductor.In another preferred embodiment, signal is led
Body includes the first and second signal conductors surrounded by the first shielding part, and described reference conductor includes by the
The first and second reference conductor that two shielding parts surround, described first reference conductor is at described reference conductor
One end be connected to described second reference conductor via terminator.This embodiment gives double-wire signal
Transmitting, wherein, reference conductor has the structure that signal conductor is similar, and its electrical characteristics and geometrical property are also
It is similar, so that the noise signal that cable moves generation is identical in two conductors.Described terminator is permissible
It is high impedance or low impedance device, such as, resistor, electrical short or open circuit folder.The type of terminator
Selection depend on the effect that will compensate.Employing high-impedance device is as described terminator, thus master
Triboelectric electrical noise is made compensation.In this case, reference leads plays the work similar with capacitor
With, this capacitor is charged by triboelectric electrical noise.
In a preferred embodiment, described Signal Measurement System also includes noise signal based on reference conductor
Control the controller unit of the measurement of primary signal.Provide a kind of feedback loop in this way, its
In, can be the control of the detecting signal unit measuring primary signal via the noise signal that reference conductor obtains
The input of device unit processed.
Preferably described controller unit is configured to described noise signal, such as, by making noise
Signal and selected threshold value compare and to measuring detecting signal unit deexcitation or activation.Specifically,
Described controller unit can be configured to, in the case of the measurement activating primary signal, open signal
The electronic component of the one or more such as lamps and/or processor of detector unit, one or more complete
Detecting signal unit or one or more circuit block, in the feelings that primary signal is measured deexcitation
Close under condition the electronic unit of one or more such as lamps and/or processor of detecting signal unit, one
Or multiple complete detecting signal units or one or more circuit block, or switch it to standby
Use pattern.Such as, described controller unit can be superordinate elements, such as, central monitoring units.
Such as, described controller unit can be right by connection or the power supply supply of interrupt signal detector unit
Detecting signal unit activates or deexcitation.
This purpose also by a kind of for by include signal conductor and reference conductor signal cable electricity
The method of conducted signal, described method preferably includes following steps:
-the first signal of primary signal is at least included by described signal conductor conductivity；And
-by the detection of described reference conductor conductivity by the movement of described signal cable or electromagnetic interference
The noise signal of induction.
In a preferred embodiment of the method in accordance with the present invention, described method also includes by from the first letter
Deduct the noise signal detected by described reference conductor in number and extract described from described first signal
The step of primary signal.The movement of described cable not only can induce noise signal in reference conductor, also
Noise signal can be induced in signal conductor.Thus, the first signal in described signal conductor includes group
Closing signal, described composite signal includes described primary signal and described noise signal.Known by utilizing
Signal processing technology deduct from described the first signal as primary signal and the combination of noise signal
Can be separately through the noise signal that reference conductor obtains to extract described primary signal.
In a preferred embodiment of the method in accordance with the present invention, described method also includes based on noise signal
Control the step of the measurement of primary signal.Provide a kind of feedback loop in this way, wherein, can
The noise signal obtained via described reference conductor is the input of the measurement process for controlling primary signal
Parameter, such as, described measurement process is sensor measurement.In a preferred embodiment, described control walks
Suddenly it is included in the noise signal detected and starts the measurement to primary signal less than in the case of selected threshold value
Step.In this way, perform primary signal in the case of cable there's almost no and moves
Measurement, thus noise signal is low, thus reduces the noise signal interference to the first signal.Do so
Improve the accuracy that primary signal is measured.In another preferred embodiment, described rate-determining steps includes
Ongoing primary signal is stopped in the case of the noise signal detected is more than or equal to selected threshold value
The step of measurement.In this way, in the case of the movement at (such as) cable be can not ignore
Not performing the measurement of primary signal, because at this moment noise signal is of a relatively high, it will cause noise signal
Interference to the first signal increases.
This purpose realizes also by the signal cable of conductivity signal, and wherein said signal cable is preferred
Including:
-signal conductor of the first signal of primary signal is included for conductivity；And
-it is only used for the movement by signal cable of detection and conductivity or the noise letter of electromagnetic interference induction
Number reference conductor.
Reference conductor according to the present invention provides rubbing of being caused by the movement of (such as) signal cable
Wiping the simple measurement of the noise signal that electrical effect is induced, it is without increasing any voltage to reference conductor
Or current signal, because of without improving the power consumption in signal cable.Thus can be independent by reference conductor
Obtain the noise signal being used for any further signal processing.Described reference signal is able to detect that
The movement of signal cable, because it was assumed that cable there occurs movement, such as, creates bending or stretching,
So make an uproar generating the signal induced by (such as) triboelectric effect or electromagnetic interference in reference conductor
Sound.
Use the signal cable conduction signal of telecommunication, such as, voltage or current signal, thus by these signals
The opposite end of cable it is sent to from one end of cable.Such as, described signal cable is at one end connected to all
Such as the signal source of the sensor for detecting primary signal, described signal cable is connected in opposite end use
In processing the device measuring signal.
In the preferred embodiment of described signal cable, the electrical characteristics of described reference conductor and geometrical property
Similar to the electrical characteristics of described signal conductor and geometrical property.
In the preferred embodiment of described signal cable, described signal conductor includes by the first shielding part bag
The first and second signal conductors enclosed, and wherein, described reference conductor includes by secondary shielding part bag
The first and second reference conductor enclosed, and wherein, described first reference conductor is at described reference conductor
One end be connected to described second reference conductor via terminator.
In the preferred embodiment of described signal cable, described reference conductor also conducts secondary signal.Logical
Cross this mode, it is not necessary to any extra conductor, and can utilize and have been used to another object
Conductor, such as the conductor of conduction control signal.
Accompanying drawing explanation
These and other aspects of the present invention will be become apparent by embodiment as described below, and
To be elaborated with reference to it.In following accompanying drawing:
Fig. 1 is the schematic sectional view of the embodiment of the signal cable according to the present invention；
Fig. 2 is schematically showing of the embodiment of the Signal Measurement System according to the present invention；
Fig. 3 is schematically showing of another embodiment of the Signal Measurement System according to the present invention；And
Fig. 4 is schematically showing of another embodiment of the Signal Measurement System according to the present invention.
Detailed description of the invention
Fig. 1 shows the schematic sectional view of the signal cable 10 according to the present invention.In this embodiment
In, signal cable 10 includes that the first signal lead 1 and the secondary signal surrounded by the first shielding part 3 are drawn
Line 2.First signal lead 1 and secondary signal lead-in wire 2 are suitable to conductivity the first signal, itself and the first screen
Shield 3 combines and defines signal conductor.Described first signal can be any signal of telecommunication, such as, width
Spend voltage signal or current signal that the function as the time changes.Such as, described first signal includes
The primary signal that sensor records, it is necessary to described primary signal is passed from sensor by signal cable 10
Deliver to signal processing unit.Signal cable 10 also includes the first reference surrounded by secondary shielding part 13
Lead-in wire 11 and the second reference leads 12.Described first reference leads the 11, second reference leads 12 and
Two shielding parts 13 collectively form reference conductor.Reference conductor is the backup of signal conductor, i.e. the
One has and the first and second identical sizes of signal lead 1,2 with the second reference leads, and includes
Same material so that described reference conductor and the electrical characteristics of signal conductor and geometrical property or
The difference that person's dimensional characteristic is shown is negligible.It means that the first shielding part 3 and
Two shielding parts 13 should have similar electrical characteristics and geometrical property, and described lead-in wire is relative to each other
And relative position relative to shielding part should also be as showing the difference of minimum.Described signal cable
Also include the 3rd shielding part 21 around described signal conductor and described reference conductor.In this embodiment
In, signal cable 10 also includes the 3rd signal lead 31 and the 4th signal for transmitting secondary signal
Lead-in wire 32.Such as, this secondary signal is the signal of the measurement controlling primary signal.Such as, at arteries and veins
In oxygen saturation of fighting instrument, described third and fourth signal lead 31,32 transmission controls the letter of illuminator
Number.
Described reference conductor the most only detects and conducted noise signal, and described noise signal is at signal electricity
In the case of cable 10 is moved, such as, bend at signal cable 10, stretch or compress
In the case of produce due to triboelectric effect.Described reference conductor also picks up, thus conduction such as electricity
Other noise sources of magnetic disturbance.Described reference conductor does not the most transmit other in addition to noise signal
Signal.In addition to primary signal, conduct in noise signal also will be present in signal cable 10 and by it.
Such as, the movement of signal cable 10 is also by the first and second signal leads 1,2 of signal conductor
Induction noise signal.Owing to the characteristic between reference conductor and signal conductor exists minimum difference, because of
And the induction noise in described reference conductor and signal conductor also would indicate that the difference of minimum.Thus,
Described signal conductor transmission primary signal and the combination of noise signal, reference conductor the most only carries noise
Signal.Thus reference conductor plays a part the reference of the noise generated because of the movement of signal cable 10.
Reference conductor will not improve the power of signal conductor and use, because application active compensation technology is not come
Reduce the noise that induces owing to cable moves, have employed passive mode on the contrary, in this way,
Reference conductor only can be detected by conduction such as believe due to the noise signal of triboelectric effect generation
The different noise sources of the movement of number cable 10.
Fig. 2 is schematically showing of the embodiment of the Signal Measurement System 100 according to the present invention.Signal
Measurement system 100 includes the detecting signal unit 41 measuring primary signal.By the first of signal conductor
With secondary signal lead-in wire 1,2, this primary signal is transmitted to signal processing unit 42.Such as, signal
Detector unit 41 is the sensor of the physiological signal of detection patient, such as, the light of pulse oximeter
Electric diode, the signal that described signal processing unit processes receives from signal conductor, and at pulse oxygen
The example of saturation instrument is calculated blood oxygen saturation by the signal received from signal conductor.Satisfy at pulse oxygen
With in the example of degree instrument, the third and fourth signal lead 31,32 is used to transmit signals to control pulse
The signal detector of the illumination of oxygen saturation instrument.Reference leads 11,12 side of described reference conductor is even
It is connected to signal processing unit 42, and is connected to terminator 43 in opposition side.For clarity, exist
Fig. 2 is shown without the shielding part shown in Fig. 1, but it is to be understood that the most also deposit
At first, second, and third shielding part 3,13,21.By the movement of (such as) signal cable 10
The noise signal of induction is transmitted to signal processing unit 42 by reference conductor in this way.Thus,
Signal processing unit 42 has the noise signal that can be used to be further processed.Such as, at described signal
Reason unit utilizes the noise signal of the first and second reference leads 11,12 receptions from reference conductor from connecing
Receive the first signal extraction primary signal from described signal conductor.In the example of pulse oximeter,
The most again calculating blood oxygen saturation from primary signal, minimally is subject to (such as) by its result
The effect of noise that triboelectric effect or electromagnetic interference generate.
Fig. 3 is schematically showing of the embodiment of the Signal Measurement System 200 according to the present invention.Signal
Measurement system 200 differs only in the Signal Measurement System 100 shown in Fig. 2, and it includes using
Noise signal is used for controlling the feedback loop 14 of the measurement of primary signal.For this purpose, described signal
Detector unit also includes control unit (not shown), and it receives noise signal, and believes based on described noise
Number control primary signal measurement.Or, described signal processing unit includes control unit (not shown).
Can control to start or stop survey advantageously with the measurement of the noise signal generated based on signal cable 10
Amount, controls the noisiness that must carry out processing or compensating in signal processing unit 42 in this way.
Such as, if moved almost without cable, then significantly can make an uproar not inducing in signal cable 10
The measurement to primary signal is started in the case of sound.In another example, if being carrying out measuring,
And signal cable starts mobile after some time, then control unit and feedback loop 14 abandon or
Stop measuring, thus avoid the primary signal in signal conductor to increase too many noise.
In general it is preferred that make reference conductor only carry noise signal and do not carry any other signal,
But in one embodiment, reference conductor may be provided with another kind of main uses, such as,
Coding resistor or control lead-in wire.
Fig. 4 is schematically showing of the embodiment of the Signal Measurement System 300 according to the present invention.Signal
With the difference of the Signal Measurement System 200 of Fig. 3, measurement system 300 is only that it does not include individually joining
Examine lead-in wire 11,12.In this embodiment, use the third and fourth lead-in wire 31,32 as with reference to drawing
Line.In this case, signal processing unit 42 will use different treatment technologies from the first signal
Extract primary signal, because described third and fourth lead-in wire 31,32 not only transmitted noise signal, also pass
Other signals defeated.In the example of pulse oximeter, use third and fourth lead-in wire 31,32 to
Described signal supervisory instrument 41 conductive illumination control signal.
Although being shown specifically in accompanying drawing and described above and describe the present invention, it should will so
Diagram and explanation regard exemplary or exemplary rather than determinate as；The invention is not restricted to
The disclosed embodiments.It would be recognized by those skilled in the art that in the basis defined without departing substantially from claim
In the case of the scope of invention, those skilled in the art are it is conceivable that other of content described in literary composition are real
Existing.Correspondingly, described above is intended merely to citing, and is not intended as limiting.The model of the present invention
Enclose and defined by claims and equivalency thereof.State in mutually different dependent claims
Some measure does not indicates that the combination that these measures be cannot be used to advantage.In the claims, " include "
One word is not excluded for other elements or step, and singular article is not excluded for plural number.Should be by claim
Reference is inferred as limiting the scope of the present invention.
Claims (13)
1. the Signal Measurement System (100,200,300) being used for measuring signal, described system bag
Include:
-it is adapted to detect for the detecting signal unit (41) of primary signal,
-signal processing unit (42),
-make the letter that described detecting signal unit (41) electrically connects with described signal processing unit (42)
Number cable (10), described signal cable (10) including:
-be suitable to from described detecting signal unit (41) fax, the first signal is directed at described letter
The signal conductor (1,2) of number processing unit (42), described first signal at least includes described original letter
Number；And
-reference conductor (11,12), is adapted to detect for by the movement of described signal cable (10)
Noise signal that is that induce or that induced by electromagnetic interference, and described noise signal fax is directed at institute
Stating signal processing unit (42), and be suitable to conduction control signal, described control signal is based on described ginseng
The described noise signal examining conductor (11,12) controls what described detecting signal unit (41) performed
The measurement of described primary signal.
Signal Measurement System the most according to claim 1 (100,200,300), wherein, institute
State signal processing unit (42) to be suitable to from described first letter conducted by described signal conductor (1,2)
Number and the described noise signal conducted by described reference conductor (11,12) in extract described primary signal.
Signal Measurement System the most according to claim 1 (100,200,300), wherein, institute
State the physiological signal that primary signal is patient.
Signal Measurement System the most according to claim 1 (100,200,300), wherein, institute
State the electricity of the electrical characteristics of reference conductor (11,12) and geometrical property and described signal conductor (1,2)
Characteristic is similar with geometrical property.
Signal Measurement System the most according to claim 4 (100,200), wherein, described letter
Number conductor includes the first and second signal conductors (1,2) surrounded by the first shielding part (3), and
Wherein, described reference conductor includes the first and second reference conductor surrounded by secondary shielding part (13)
(11,12).
Signal Measurement System the most according to claim 1 (100,200,300), wherein, institute
State Signal Measurement System and also include being configured to supply the controller unit of described control signal.
7., via a method for signal cable (10) conductivity signal, described signal cable includes letter
Number conductor (1,2) and reference conductor (11,12), described method comprises the steps:
-the first signal of primary signal is at least included via described signal conductor (1,2) conductivity；-
Via described reference conductor (11,12) detection also conductivity by the shifting of described signal cable (10)
Noise signal that is dynamic or that induced by electromagnetic interference, and via described reference conductor (11,12) fax
Lead control signal, described control signal described noise signal based on described reference conductor (11,12)
Control the measurement of described primary signal.
Method the most according to claim 7, also include by deduct from described first signal by
Described noise signal that described reference conductor (11,12) detects and extract from described first signal
The step of described primary signal.
Method the most according to claim 7, is additionally included in the noise signal detected less than selected
The step of the measurement of described primary signal is started in the case of threshold value.
Method the most according to claim 7, is additionally included in the noise signal detected and is more than
The step of the measurement of ongoing described primary signal is stopped in the case of selected threshold value.
11. 1 kinds of signal cables (10) for conductivity signal, described signal cable includes:
-be suitable to the signal conductor (1,2) that conductivity includes the first signal of primary signal；And
-reference conductor (11,12), described reference conductor (11,12) is suitable to:
-detection and conductivity by the mobile induction of described signal cable (10) or by electromagnetism
The noise signal of interference induction,
-conduction control signal, described control signal is based on described reference conductor (11,12)
Described noise signal controls the measurement of described primary signal.
12. signal cables according to claim 11 (10), wherein, described reference conductor (11,
12) electrical characteristics of electrical characteristics and geometrical property and described signal conductor (1,2) and geometrical property phase
Seemingly.
13. signal cables according to claim 12 (10), wherein, described signal conductor bag
Include the first and second signal conductors (1,2) surrounded by the first shielding part (3), and wherein, institute
State the first and second reference conductor (11,12) that reference conductor includes being surrounded by secondary shielding part (13).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10158940.6 | 2010-04-01 | ||
| EP10158940 | 2010-04-01 | ||
| PCT/IB2011/051328 WO2011121537A1 (en) | 2010-04-01 | 2011-03-29 | Signal measuring system, method for electrically conducting signals and a signal cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102822682A CN102822682A (en) | 2012-12-12 |
| CN102822682B true CN102822682B (en) | 2016-12-14 |
Family
ID=
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|---|---|---|---|---|
| DE3431994A1 (en) * | 1983-09-05 | 1985-04-04 | Olympus Optical Co., Ltd., Tokio/Tokyo | Noise suppression device for an endoscope |
| US4919114A (en) * | 1988-01-14 | 1990-04-24 | Olympus Optical Co., Ltd. | Endoscope provided with flexible signal wires |
| US5569158A (en) * | 1993-10-15 | 1996-10-29 | Fuji Photo Optical Co. Ltd. | Shielding structure of electronic endoscope apparatus |
| EP0739602A1 (en) * | 1995-04-25 | 1996-10-30 | Olympus Optical Co., Ltd. | Endoscopic apparatus |
| CN101076281A (en) * | 2004-06-10 | 2007-11-21 | 荷兰联合利华有限公司 | Apparatus and method for reducing interference |
| WO2009041723A1 (en) * | 2007-09-28 | 2009-04-02 | Fujifilm Corporation | Image pickup device and endoscope provided with image pickup device |
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|---|---|---|---|---|
| DE3431994A1 (en) * | 1983-09-05 | 1985-04-04 | Olympus Optical Co., Ltd., Tokio/Tokyo | Noise suppression device for an endoscope |
| US4919114A (en) * | 1988-01-14 | 1990-04-24 | Olympus Optical Co., Ltd. | Endoscope provided with flexible signal wires |
| US5569158A (en) * | 1993-10-15 | 1996-10-29 | Fuji Photo Optical Co. Ltd. | Shielding structure of electronic endoscope apparatus |
| EP0739602A1 (en) * | 1995-04-25 | 1996-10-30 | Olympus Optical Co., Ltd. | Endoscopic apparatus |
| CN101076281A (en) * | 2004-06-10 | 2007-11-21 | 荷兰联合利华有限公司 | Apparatus and method for reducing interference |
| WO2009041723A1 (en) * | 2007-09-28 | 2009-04-02 | Fujifilm Corporation | Image pickup device and endoscope provided with image pickup device |
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