CN106461599A - Method for operating sensor apparatus - Google Patents
Method for operating sensor apparatus Download PDFInfo
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- CN106461599A CN106461599A CN201580031474.5A CN201580031474A CN106461599A CN 106461599 A CN106461599 A CN 106461599A CN 201580031474 A CN201580031474 A CN 201580031474A CN 106461599 A CN106461599 A CN 106461599A
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- voltage
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- electric capacity
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- tampering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/4065—Circuit arrangements specially adapted therefor
Abstract
A method for operating a sensor apparatus (110) is proposed. The sensor apparatus (110) has at least one sensor element (112) for sensing at least one portion of a gas component in a gas in a measuring gas chamber (114). The sensor element (112) comprises at least one first electrode (116) and at least one second electrode (118). The second electrode (118) is arranged in at least one measuring cavity (120). The measuring cavity (120) can be supplied with gas from the measuring gas chamber (114) via at least one diffusion barrier (122). The first electrode (116) and the second electrode (118) are connected by means of at least one solid electrolyte (124) and form a pump cell (126). The sensor apparatus (110) additionally has at least one controller (128). The controller (128) is connected to the first electrode (116) by means of at least one first signal line (130). The controller (128) is connected to the second electrode (118) by means of at least one second signal line (132). The first signal line (130) is connected to an electrical earth (136) by means of at least one first interference suppression capacitance c1 (134). The second signal line (132) is connected to the electrical earth (136) by means of at least one second interference suppression capacitance c2 (138). At least one measuring resistor (140) is arranged between the electrical earth (136) and at least one from the first signal line (130) and the second signal line (132). The controller (128) is set up to operate the pump cell (126) with a function current. The method involves application of a plurality of different switching states to the pump cell (126) in order to determine the first interference suppression capacitance c1 (134) and the second interference suppression capacitance c2 (138).
Description
Background technology
The method becoming known in principle running sensor device by prior art.Permissible by such sensor device
Realize qualitative detection and/or the detection by quantitative of the gas componant of gas, the gas componant especially in air fuel mixture
Detection.But alternatively or additionally, also can by the gas characteristic of such sensor device detected gas, such as gas appoint
Meaning physical characteristics and/or chemical characteristic.In principle can also detected gas multiple characteristics.Especially can be by such sensor
Equipment application is in automotive field.Described gas can be for example the waste gas in the measurement gas space of internal combustion engine, especially in machine
In motor-car field, and measurement gas space is, for example, exhaust apparatus.
Such sensor device can have the sensor of at least one share of the gas componant for detected gas
Element.For example sensor element can be as " the Sensoren im Kraftfahrzeug " in Konrad Reif (publication side)
It is configured as lambda seeker described in (second edition in 2012, the 160-165 page).Lambda seeker can not only be configured as at 2 points
Formula lambda seeker and be configured as broadband lambda seeker, the especially broadband lambda seeker of plane.Can determine burning by lambda seeker
The gas share of the admixture of gas in room, such as air coefficient λ, described air coefficient illustrates air-fuel ratio.By two
Point type lambda seeker only in tightly narrow scope stoichiometric mixing in (λ=1) determine that air-fuel ratio is possible
's.In contrast, by broadband lambda seeker its generally according to the principle of pump unit (Pumpzell), preferably in combination with electrification
In, Ernest ＆ Whitney cell operation can be implemented in the determination in the big scope of λ.Such ceramic sensor element is based on
The application of the electrolyte properties of solid determining, is particularly based on the characteristic of the ionic conduction of described solid.These sensor elements are big
Include the ceramiic solid electrolyte that is preferably made up of or the solid layer being preferably made up of zirconium dioxide zirconium and/or yttrium more.
Such pump unit can be by two electrodes being connected by solid electrolyte, especially internal pump electrode and external pump
Electrode is formed.Sensor device can have control device in principle, and control device is provided for applying pump electric current to pump unit.
For example sensor element can be run with unidirectional current or in pulsed is run.Such as document DE 10 2,008 001 697A1 retouches
State：Pump electric current can be the pump electric current of pulse form, and it has fixed frequency, variable dutycycle and adjustable sign
(Vorzeichen).The operation by such pump electric current of sensor element can be referred to as the pulsed fortune of sensor element
OK.
In principle can in signal line, for example be provided with the cable bundle of sensor device anti-tampering electric capacity be used for into
Row protection for example avoids the static charging of the electronic installation of sensor device.Known to document DE 10 2,010 000 663A1
It is, in order to the High-frequency Interference being buffered between the signal line of broadband lambda seeker and ground connection and high voltage enter, electricity can be provided with
Container.Constantly these electric capacity can be recharged in the pulsed of sensor element is run.Recharge current part stream
Pump unit through sensor element and improve or reduce pump electric current and must be considered in characteristic curve calibration.
Additionally, a kind of described in document DE 10 2010 000663A1 recharge correction feature curve for calibration
Method.To be caused as follows by periodically switching between two on off state Z_1 and Z_2：I.e. in the lambda seeker of broadband
Portion pump electrode connection end IPE and pulse form pump electric current I is existed on outside pump electrode connection end APESQ.The position of the switch Z_1 and Z_2
Here is capable of in resistance RGNDOn voltage drop UGNDEdge trigger measurement in case calibration recharge correction.Capacitor
Recharge map procedures to by resistance RGNDBy on electric current.In resistance RGNDThe electricity for position of the switch Z_1 of upper landing
Pressure UguaWith the voltage U for position of the switch Z_2guiTherefore comprise to recharge information.Recharge current dIumIt is for calibration
Important share and in document DE 10 2010 000663A1 pass through dIum=Fum·(Ugui-Ugua/RGNDS) calculate, wherein,
Fum=Tsd/Tp.Here, TsdIt is the persistent period (time of integration) of measures conversion, TpIt is to continue the clock cycle that pulsed is run
Time, and RGNDSIt is the expected value of resistance.
Recharge current I can not considered in principlepumIn the case of set by the constant-current source of sensor device
Effective duty cycle IPS and measured Current calculation average pump electric current Ip0：Ip0=IPS Isq, wherein, effective dutycycle is
IPS=(Tp-Tm)/Tcyclus.TcyclusHere is the persistent period of measure the cycle, such as TcyclusCan be=666 μ s.TpAnd Tm
It is the persistent period applying positive current pulses and negative current pulse to sensor device respectively.Considering recharge current Ipum's
In the case of, can be by Ip=Ip0+IpumDetermine average pump electric current Ip.Three can be applied to sensor device in measure the cycle
On off state, wherein, can apply positive current pulses to sensor device, in second switch state in first switch state
Apply negative current pulse to sensor device, and apply pulse interval to sensor device in the 3rd on off state, wherein,
Do not apply electric current to sensor device.For example pulse interval can be applied to sensor device first, for example, there are fixing 185
The persistent period of μ s.And then another on off state, such as negative current pulse can be applied to sensor device.And then again can
To apply another pulse interval to sensor device.The persistent period here of pulse interval can be variable and for example, exist
Between 0 and 301 μ s.Another on off state, such as positive current pulses can be applied to sensor device after pulse interval.Tool
The persistent period here having the on off state of positive or negative current impulse can be variable.The such as persistent period can be in 90 μ s
And 391 μ s between.Each change of on off state can cause and recharges variation on anti-tampering electric capacity
(Umladespannungshub).The quantity of electric charge recharging skew for each can be done anti-by between two on off states
The voltage difference disturbed on electric capacity determines.Here, the voltage on off state end can be respectively used to determine described difference.For
The quantity of electric charge dQ of each on off state changesxAnti-tampering electric capacity can be multiplied by by voltage difference dUsx between two on off states
Corresponding capacitance value cnDetermine：dQsx=cn·dUsx.The average recharge current I of on off state changeumsxCan be by Iumsx=
dQsx/TcyclusDetermine.If the currently all electric current recharging flows through sensor element and adds up, permissible
Determine the total recharge current I by sensor elementpum.Described recharge current can consider in the calculating of probe current,
Especially can realize detecting the correction of stream.For example different current impulses can be applied to sensor element in pulsed is run
Pattern (timing mode), such as pulse-back pulse, current impulse pattern (timing mode 1) or the electric current with only negative pulse
Pulse mode (timing mode 2).In timing mode 1, the updating formula of recharge current can be：
Ipum=[ci(Ui2-Uref)+ca(Ua2-Uref-Up0)]/Tcyclus,
Wherein, UrefIt is the expected value of the reference voltage of sensor device, and Up0It is the value of pump voltage in pulse interval.
Ui2And Ua2It is the magnitude of voltage of the end on off state, the on off state for example with negative current pulse, wherein it is possible to survey
Voltage U between amount external electrode and ground connectiona2And the voltage U between interior electrode and ground connection can be measuredi2.Additionally, ciAnd caIt is
The capacitance of anti-tampering electric capacity.In timing mode 2, the updating formula of recharge current can be：
Ipum=[ci(Ui2+Ui4-2-Uref)-2ca(Ua2+Uref+Up0)]/Tcyclus,
Wherein, Ui4It is an on off state end, for example there is magnitude of voltage at the on off state of positive current pulses.For
Determine updating formula however, it would be possible to the expected value of capacitance application component for anti-tampering electric capacity.
Known described for calibrating, especially characteristic curve calibration method relevant with the capacitance of anti-tampering electric capacity.Former
Then going up can be for the expected value of described capacitance application component.But here does not consider the sample distribution of capacitance, possible
Temperature-responsive (Temperaturgang) and possible long time drift.But described application be may require that and be less than ± 10
The pump current precision of μ A.In the case of λ=1 until under ± 30% capacitance tolerance, by means of the expected value of anti-tampering electric capacity
Calibration can lead to pump electric current inexactness.Therefore can be in voltage change process, especially in the change in voltage of pump voltage
During toning occursToning possibly for application for be unacceptable.
Content of the invention
It is therefore proposed that a kind of method for running sensor device, methods described at least avoids known method as far as possible
Predictable shortcoming.The pump current precision less than ± 10 μ A especially should be realized.
Sensor device can be interpreted as arbitrarily following equipment in principle, described equipment is provided for detected gas composition
Share, especially in admixture of gas, such as in measurement gas space, such as example in the exhaust apparatus of internal combustion engine.Pass
Sensor equipment has at least one of at least one share for detecting the gas componant in the gas in measurement gas space
Sensor element.Sensor element at least one share of the gas componant in detected gas can be understood as following unit
Part, described element is, for example, the ingredient of sensor device, arranges or can aid in the gas componant of probe gass
Share.Possible configuration with regard to sensor element can be in principle with reference to above-mentioned prior art.Sensor element can be especially
Ceramic sensor element, especially has the ceramic sensor element of layered structure.Sensor element can be especially plane pottery
Porcelain sensor element.The detection of at least one share of gas componant can be understood as the qualitative detection of the gas componant of gas
And/or detection by quantitative.But in principle, sensor element can be provided for any physical characteristic and/or the change of detected gas
Learn characteristic, the such as granule in the temperature of gas and/or pressure and/or gas.Other characteristics are also detectable in principle.Gas
Body can be arbitrary gas in principle, for example waste gas, air, air-fuel mixture or other gases.The present invention is especially useful
In automotive field, thus gas can be especially air-fuel mixture.Usually, gas space will can be measured
Between be interpreted as following space：Gas to be detected is located in described space.The present invention is used especially for machine as being performed as described above
In motor-car technical field, thus measurement gas space can be especially the exhaust apparatus of internal combustion engine.However, it is also possible to consider other
Application.
Sensor element includes at least one first electrode and at least one second electrode.Title " first " and " second " electricity
Pole is used as pure title and is not especially with regard to order and/or about whether the conclusion that for example also there are other electrodes.Usually,
Electrode can be understood as the conductive region of sensor element, and described region for example can be applied in curtage.First and
Two electrodes can especially be configured as metal-ceramic electrode, that is, so-called Cermet electrode, especially platinum Cermet electrode.
Second electrode is arranged at least one measurement cavity.Measurement cavity can be understood as the sky in sensor element
Chamber, described cavity can be provided for carrying out the storage of the gas componant of gas.Measurement cavity can be configured as fully or portion
Open wide with dividing.Additionally, measurement cavity can completely or partially be filled with such as porous media, the such as aluminium oxide of porous.Example
As second electrode can be configured as internal pump electrode.
Measurement cavity can apply the gas from measurement gas space by least one diffusion barrier.Diffusion barrier is permissible
It is interpreted as the layer being made up of following material：Described material promotes or is capable of gas and/or liquid and/or ion expansion
Dissipate, but suppression gas and/or liquid flowing.Diffusion barrier can especially have the ceramic structure of porous, especially has
The porous ceramic structure of the bore dia through targetedly adjusting.Diffusion barrier can have diffusional resistance, wherein, diffusional resistance
Can be regarded as following resistance, diffusion barrier reacts on diffusion flow with described resistance.
First electrode and second electrode are connected by least one solid electrolyte and form pump unit.Solid electrolyte
Can especially ceramiic solid electrolyte, the oxygen of such as zirconium oxide, especially yttrium stable zirconium oxide (YSZ) and/or scandium doping
Change zirconium (ScSZ).Solid electrolyte may be preferred that gas is not transparent and/or may insure that ion conveys, such as ion-oxygen
Conveying.First and second electrodes can be especially region that can be conductive, metal coating that for example can be conductive, and described region can be applied
It is added at least one solid electrolyte and/or can otherwise contact solid electrolyte.Especially can be by applying electricity
Oxygen is passed through diffusion barrier from gas pumping to measurement cavity or by it to the first and second electrodes by pressure, especially pump voltage
Pumping goes out.
Sensor device also has at least one control device.Control device can be understood as following equipment, described equipment
It is provided for running sensor element.Control device can be central authorities or scattered.Control device can include at least one
Data handling equipment, for example, at least one processor, especially at least one microcontroller fills device.Control device can for example fully
Or be partially integrated in another equipment, such as in control device and/or device for controlling engine.Sensor element can have
At least one interface, at least one interface described can be connected with control device.For example, control device can also fully or portion
It is integrated in sensor element or is alternatively completely or partially integrated in the miscellaneous part of sensor device, for example with dividing
In plug assembly.
Control device is connected with first electrode by least one first signal line.First signal line can be managed in principle
Solve any connection for control device and first electrode, described connect setting is used at least one signal, especially current signal
And/or voltage signal is transferred to first electrode by control device and/or is transferred to control device by first electrode.For example, first
Signal line can completely or partially be configured as feed line and/or cable and/or switch.Feed line can for example complete or portion
Ground is divided to be embodied as the feed line in layered structure.
Control device is connected with second electrode by least one secondary signal circuit.Secondary signal circuit can be managed in principle
Solve any connection for control device and second electrode, described connect setting is used at least one signal, especially current signal
And/or voltage signal is transferred to second electrode by control device and/or is transferred to control device by second electrode.For example, second
Signal line equally can completely or partially be configured as feed line and/or cable and/or switch.
First signal line passes through at least one first anti-tampering electric capacity c1 and grounding connection.Secondary signal circuit passes through extremely
A few second anti-tampering electric capacity c2 and grounding connection.Ground connection can be understood as conductive member in principle, and described component has ginseng
Examine current potential, especially 0 volt current potential.Title " first " and " second " anti-tampering electric capacity as pure title and are not especially with regard to suitable
Sequence and/or about whether the conclusion that for example also there are other anti-tampering electric capacity.First and second anti-tampering electric capacity are permissible in principle
It is interpreted as any capacitor, described capacitor is provided for buffered hf interference and high pressure enters, especially relative to grounding lead
Lead High-frequency Interference and high pressure enters and thereby, it is ensured that protection for example avoids static charging.
In addition at least one survey is arranged between at least one of the first signal line and secondary signal circuit and ground connection
Amount resistance.Measurement resistance can be understood as arbitrary ohmage in principle, can implement electric current thereon and/or voltage is surveyed
Amount.First signal line and/or secondary signal circuit can be able to can be connected with ground connection by measuring resistance.Preferably, Ke Yi
Including measurement resistance first and/or secondary signal circuit and ground connection between connection in be provided with least one switch.Switch
Can be understood as arbitrary, especially conductive component, described component is provided for especially electrically connecting first and/or secondary signal
Circuit and measurement resistance and ground connection, and/or separate first and/or secondary signal circuit and the connection measuring resistance and ground connection.Example
As switch can connect first and/or secondary signal circuit and measurement resistance and ground connection in closure state, and in open shape
First and/or secondary signal circuit and measurement resistance and ground connection is separated in state.
Measurement resistance and the second anti-tampering electric capacity c2 can be connected in parallel.Measurement resistance and the second anti-tampering electric capacity c2
The electrode of identical name especially can be connected with each other.Measurement resistance and the first anti-tampering electric capacity c1 can be connected in parallel.
Control device is provided for running pump unit with function electric current.Function electric current can be understood as arbitrarily as follows in principle
Electric current：Described electric current can have any change procedure in principle.Preferably, function electric current can have at least one electric current arteries and veins
Punching particularly preferably, function electric current can have pulsed mechanical periodicity process.For example function electric current can be selected from the following group
The group becoming：Sinusoidal function electric current, rectangular current, delta current, saw-tooth current.In principle, function electric current can also have
Other change procedures." running pump unit with function electric current " is in principle it is to be understood that control device can be provided for pump
Unit, especially first and/or second electrode apply function electric current.Preferably, can apply just and/or negative pulse to pump unit.
Function electric current can also have at least one pulse interval, wherein, does not apply current impulse to pump unit in an interval.
In the process by pump unit apply multiple difference on off states determine the first anti-tampering electric capacity c1 and
Second anti-tampering electric capacity c2.Control device especially can have switch it is preferable that control device can have multiple switch.Make
Above-mentioned switch can be provided with for first switch in the connection between secondary signal circuit and ground connection including measurement resistance.This
Outward, second switch can be arranged on sensor element and the connection between the following reference voltage source that will be described further
In.On off state by the state of electronic component, the state of especially at least two switches and/or can pass through pump electric current in principle
Flow direction limiting.First anti-tampering electric capacity c1And the second anti-tampering electric capacity c2Determination can be understood as in principle
The asking for of capacitance in the operation of sensor device, especially with the asking for of the deviation of the expected value of anti-tampering electric capacity.
In another operation of described sensor device, especially there is pulsed applying electric current and/or voltage to described
The pulsed of pump unit considers described anti-tampering electric capacity in running.Especially can be in another operation lieutenant colonel of described sensor device
Pass through the toning that described anti-tampering electric capacity causes.First and second anti-tampering electric capacity can be in the pulsed of detector be run
Applying according to positive or negative pulse is recharging.Such recharging can lead to additional electric current, especially recharge current, its
Can improve or reduce pump electric current.Such change of pump electric current can lead to the change in voltage of the pump voltage in sensor element
During toning.
Furthermore, it is possible to consider anti-tampering electric capacity in the determination of the characteristic curve of sensor device.The spy of sensor device
Levy the relation that curve can be understood as pump voltage and air coefficient λ.Especially can be in the determination of the characteristic curve of sensor device
The middle change being caused by recharge current considering pump electric current consequent toning in voltage change process.
Methods described may comprise steps of：
A) the first measuring process, wherein, applies first switch state in described first measuring process described pump unit
z0, wherein, described first measuring process detects pump voltage Up0And determine ohmically first voltage U of described measurementg0, its
In, described first measuring process also determines that voltage Uc between described first electrode and described ground connection in additiona0With described
Voltage Uc between second electrode and described ground connectioni0；
B) the second measuring process, wherein, applies second switch state in described second measuring process described pump unit
z2, wherein, described second measuring process determines the voltage Uc between described first electrode and described measurement resistancea2With institute
State the voltage Uc between second electrode and described measurement resistancei2, wherein, detect described in described second switch state in addition
Measure ohmically voltage UguaAnd the charge volume Q of recharge current can be determined by toninggua；And
C) the 3rd measuring process, wherein, applies the 3rd on off state in described 3rd measuring process described pump unit
z1, wherein, described 3rd measuring process determines the voltage Uc between described first electrode and described measurement resistancea1With institute
State the voltage Uc between second electrode and described measurement resistancei1, wherein, can detect in the ohmically voltage U of described measurementgui
And the charge volume Q of recharge current is determined by toninggui.
These method and steps can for example be implemented with described order.But it is also possible on another principle of temporal sequence.In principle
One or more or all method and steps can also repeatedly be implemented.Term " first step ", " second step " and " the 3rd step
Suddenly " be used as pure title and be not especially with regard to order and/or about whether the conclusion that for example also there are other measuring processs.
Can be in end point detection pump voltage U of the pulse interval of function electric current in the first measuring processp0.Pulse interval
End can be understood as when in pulse interval is before realizing applying current impulse again.In first switch shape
Reference voltage can be applied to sensor element in state.First switch state can be understood as no current state, especially between pulse
The following state having a rest：Do not apply current impulse to pump unit in described state.Second switch especially in first switch state
Can have closure state and therefore apply reference voltage to sensor element.Reference voltage in pulse interval can be with principle
The upper negative polarization so selecting the maximum as far as possible so that voltage is more than pump unit.Therefore can stop：The current potential of first electrode
Drop under the current potential of ground connection.Reference voltage especially can be more than 2V.Preferably, reference voltage can be 3.3V.Sensor
Equipment especially can have analog-digital converter, and described analog-digital converter has the reference voltage of 3.3V.True in voltage
In fixed, the voltage between the other element of sensor device may be referred to described reference voltage.In second electrode and ground connection
Between voltage Uci0Reference voltage can be equal to.Voltage Uc between first electrode and ground connectiona0Can be reference voltage with
Pump voltage Up0Sum.
Voltage Uca2With voltage Uci2Can be determined after transient process (Einschwingvorgang).Voltage Uca1
With voltage Uci1Can be determined after transient process.Transient process can be understood as until reach pump voltage value lasting when
Between, it has a deviation with the quiescent value of pump voltage less than 20%, preferably smaller than 15% deviation and particularly preferably having
There is the deviation less than 10% with the quiescent value of pump voltage.Voltage can also be realized in principle in the case of there is no transient process
Determine.
In order to accurately determine voltage it is necessary to measure the end-state of first switch state in principle.Generally cannot realize
The accurate measurement of end-state.Preferably, being averaging of magnitude of voltage, such as asking on 70 μ s can be realized in the process
Averagely.Consequent detection error can be had with depolarization (Depolarisation) motion of pump voltage in pulse interval
Close.Measure the cycle can be understood as the following time period：Can be with methods ＆＆ steps of implementation a)-c in the described time period) at least one
Individual.Method and step a)-c) can implement all in a measure the cycle or can be individually respectively in a measure the cycle
Implement.Preferably, measure the cycle can be 666 μ s length.
In second switch state, first electrode can be connected with measurement resistance.Especially can the first signal line with
It is provided with least one switch, at least one switch described is in second switch state in the connection of inclusion measurement resistance between ground connection
In be capable of first electrode with measurement resistance connection.In second switch state, can be negative to sensor element applying
Current impulse, thus pump electric current flow to first electrode from second electrode.In second switch state, work(can be applied to pump unit
The current impulse of energy electric current, especially negative pulse, wherein, recharge to anti-tampering electric capacity.Positive pulse can be understood as following pulse：
In the case of described pulse, electric current flow to second electrode by first electrode and flow to measurement resistance by switch.Compare it
Under, in the case of negative pulse, electric current flow to first electrode by second electrode and flow to measurement resistance by switch.
Recharging of anti-tampering electric capacity can be realized in the case of switching especially between different on off states.Preferably may be used
With realize first switch state and second switch state, second with first switch state, first and the 3rd on off state and
Switching between 3rd and first switch state.
In the 3rd on off state, second electrode can be connected with measurement resistance.First switch especially can close and
Guarantee the connection of second electrode and measurement resistance.In the 3rd on off state, positive current pulses can be applied to sensor element,
Thus pump electric current flow to second electrode by first electrode.In the 3rd on off state, function electric current can be applied to pump unit
Current impulse, especially positive pulse, and can recharge to anti-tampering electric capacity.
As set forth above, it is possible to be determined the quantity of electric charge Q of recharge current by toninggua.Especially in the time-varying process of toning
Under area can be proportional to the quantity of electric charge of recharge current.Voltage UguaCan be by voltage signal in pulse persistance
Between on integration determining.Voltage UguaEspecially can be by maximum 100 μ s, preferably at most 80 μ s and particularly preferably about
Integration on the time of integration of 71 μ s determining, such as 70 ± 5 μ s.In a preferred embodiment, the time of integration is permissible
For 71 μ s.The time of integration being longer than 71 μ s can also be possible in principle.Sensor device can have Sigma-Delta-
Transducer.Sigma-Delta- transducer can be provided on the time period, especially over the integration period in measurement resistance
The voltage signal integration of upper detection.Preferably, integration can start to come in fact from applying connection edge (Einschaltflanke)
Existing.Connect the behavior that edge can be understood as the pump voltage when applying current impulse.Voltage U by so determinationguaCan deduct
Voltage signal in the case of not having toning.Especially can be by voltage UguaDeduct the voltage determining in first switch state
Ug0, wherein, function electric current can have identical value in the voltage measurement in the first and second on off states.Sensor device can
To have at least one current source, at least one current source described can be provided for all measurements in different on off states
Middle feed-in same current.Current source can especially constant-current source.Especially deviation as at least one current source voltage response
(Spannungsgang) measurement error can be produced.Voltage Ug0With UguaDifference can with the quantity of electric charge of recharge current become ratio
Example.The quantity of electric charge can be especially Qgua=(Ugua-Ug0)·Tadc/Rgnds, wherein, TadcIt is the conversion of Sigma-Delta- transducer
Device time, and RgndsIt is the expected value of measurement resistance.In one embodiment, the transducer time can be 70 μ s.
Similar determination can be with regard to the quantity of electric charge Q of recharge currentguiRealize.The quantity of electric charge can be especially Qgui=
(Ugui-Ug0)·Tadc/Rgnds.
Sensor device can be provided for implementing quantity of electric charge QguiAnd QguaDetermination.Sensor device can be provided for
Methods ＆＆ steps of implementation a)-c).Sensor device can be provided for controlling start time and/or switch shape for measure the cycle
Conversion between state, preferably accurately controls μ s.Sensor device one kind preferred embodiment in, sensor device is permissible
There is the combination being made up of simulation low-pass filter and Sigma-Delta- transducer.Also contemplate for other configurations in principle.Example
As can be with application simulation integrator, wherein it is possible to the end value of scanning device analogue integrator and being AD converted.
The measured quantity of electric charge Q of recharge currentguaAnd QguiThe expected quantity of electric charge recharging can be contrasted.
Methods described can also have steps of：
I) the first determination step, wherein it is determined that voltage Uci0With voltage Uci2Between poor dUci2With in voltage Uca0With electricity
Pressure Uca2Between poor dUca2；
Ii) the second determination step, wherein it is determined that voltage Uci0With voltage Uci1Between poor dUci1With in voltage Uca0With electricity
Pressure Uca1Between poor dUca1；
Iii) the 3rd determination step, wherein it is determined that described anti-tampering electric capacity c1And c2.
These method and steps for example can be implemented with described order.But it is also possible on another principle of temporal sequence.In principle
One or more or all method and steps can also repeatedly be implemented.Term " first determination step ", " the second determination step " and
" the 3rd determination step " as pure title and is not especially with regard to order and/or to determine step about whether for example also there are other
Rapid conclusion.
Determine in step the 3rd, anti-tampering electric capacity c can be determined by solving system of linear equations1And c2.Especially permissible
Determine anti-tampering electric capacity by solving equation below group：
d∪ci2·c1+d∪ca2·c2=Qgua
d∪ci1·C1+d∪ca1.c2=Qgui.
The accurate determination of anti-tampering electric capacity can be realized in the case of big toning.When recharging of anti-tampering electric capacity
The area of journey that is, the area under toning so big so that the tolerance of switch time has shadow as little as possible to result
Ring and recharge when overcharge no longer than the time of integration, it is possible to achieve the accurate determination of anti-tampering electric capacity.In principle, by existing
There is technology known with 16 milliamperes of electric current operation sensor element, wherein, measurement resistance is 100 Ω.Within the scope of this invention
Have confirmed as advantageously, sensor element being run with electric current as little as possible.Electric current as little as possible is for example appreciated that
It is less than the electric current of 16 milliamperes, preferably smaller than 12.5 milliamperes and particularly preferred 10 milliamperes.However, other electric currents are also possible
's.Such as sensor device can have adjustable current source, and described current source is capable of for running sensor element
The regulation of electric current and therefore, it is possible to realize adjust (Einstellung).In a preferred embodiment, can be with 10
The electric current of milliampere runs sensor element.But other electric currents are also possible.Described preferred embodiment in, measurement electricity
Resistance can have the resistance of such as 100 Ω, and the resistance of sensor element can be such as 26 Ω.But other resistance are also
Possible.The voltage Uc of such as 3.3V to 1.26V can be recharged in the determination of anti-tampering electric capacityi(1/2).But other voltages
It is also possible.Measurement in order to ensure pump voltage is also possible in the case that electric current drops to 10 milliamperes, can be such
Select positive pulse, especially before the 3rd on off state pulse interval persistent period so that can implement pump voltage measurement.
Preferably, sensor element can run in λ=1 adjusts and runs, and in this regulation runs, pump current requirements can be very low.Cause
This can stop：The persistent period of pulse interval does not become too much compared to the overall measurement cycle.The persistent period of pulse interval
Can be especially 15%, preferably 10% and particularly preferred the 5% of measure the cycle.Further preferably, pump voltage can be multiple
Do not realize in switch periods changing, because magnitude of voltage to be detected can distribute in time on multiple cycles.But principle
On be capable of the change in 10%, preferably 5% and particularly preferred the 1% of pump voltage scope.Pump voltage can λ=
1 passes through to be particularly stable afterwards and in λ=1 by period less stable.Switch periods here can be understood as being selected from
At least one on off state of first, second, and third on off state with another selected from first, second, and third on off state
Switching between on off state.
Sensor device can have Sigma-Delta- transducer as described above, and wherein, method can have non-
Linearity correction.In principle, real Sigma-Delta- transducer can not be and linearly describes non-static signals, but compares
Only distortion signal is described in preferable Sigma-Delta- transducer, thus the gamma correction of magnitude of voltage can be necessary
's.Gamma correction can be realized by correction function, and correction function can be relevant with anti-tampering electric capacity.Correction function is permissible
Realized by the preferable Sigma-Delta- transducer of relatively real Sigma-Delta- transducer and simulation.In order to
Anti-tampering electric capacity really periodically between also ensure that the functional mode of Sigma-Delta- transducer, therefore can realize anti-tampering electric capacity
Recurrence determine.Especially can realize coming by not calibrated Sigma-Delta- transducer signal in the first aligning step
Determine not calibrated anti-tampering electric capacity and to implement gamma correction by not calibrated anti-tampering electric capacity.In another school
Calibrated difference (the U of magnitude of voltage is can determine in positive stepgui-Ug0) and (Ugua-Ug0) and realize calibrated anti-tampering electricity
The determination held.These aligning steps can especially individually or both repeatedly implement, to realize gamma correction institute's phase
The precision hoped.
A kind of sensor device is proposed in a still further aspect thereof.Described sensor device has for detection measurement
At least one sensor element of at least one share of the gas componant in gas in the gas compartment.Described sensor element
Including at least one first electrode and at least one second electrode, wherein, it is empty that described second electrode is arranged at least one measurement
In chamber.Described measurement cavity can apply the gas from described measurement gas space by least one diffusion barrier.Described
One electrode and described second electrode are connected by least one solid electrolyte and form pump unit.Described sensor device is also
There is at least one control device, at least one control device described passes through at least one first signal line and described first electricity
Pole connects.Described control device is connected with described second electrode by least one secondary signal circuit.Described first holding wire
At least one first anti-tampering electric capacity c1 and grounding connection are passed through in road.It is second anti-dry that described secondary signal circuit passes through at least one
Disturb electric capacity c2 and described grounding connection.In described ground connection with described first signal line and described secondary signal circuit at least
Arrange between one that at least one measures resistance.Described control device is provided for running described pump unit with function electric current.
The enforcement that sensor device is provided for implementing according to one of above-mentioned embodiment or also will be evident from below
The method of one of mode.Such as control device can correspondingly be provided for for example implementing methods described by programming technique.
For sensor device possible configuration can correspondingly reference method foregoing description.
The invention still further relates to a kind of computer program and a kind of electronic storage medium and control electronics, described calculating
Machine program is provided for implementing each step of the method according to the invention, and described computer program is stored in described Electronic saving
On medium, described control electronics include described electronic storage medium.
Invention advantage：
Methods described is favourable compared to known method of the prior art.The reality of anti-tampering electric capacity especially can be asked for
Actual value and therefore consider sample distribution, temperature-responsive and the long time drift of anti-tampering electric capacity in characteristic curve calibration.
Furthermore, it is possible to be also used for applying as follows therefore, it is possible to realize sensor device：Can need in the application to be less than ± 10 μ A
Pump current precision.
Brief description
Accompanying drawing illustrates：
Figure 1A -1C：Three on off states are used for implement the equivalent circuit of the sensor device according to the inventive method
Figure；
Fig. 2：The schematic overview of the determination of recharge current；
Fig. 3 A-3C：Voltage change process on the time-varying process of pump electric current, the first and second electrodes and the first electricity
The change procedure of the voltage difference of voltage of pole and second electrode.
Specific embodiment
It is shown in Figures IA-1 C in three on off states and be used for implementing the sensor device 110 according to the inventive method
Equivalent circuit diagram.Sensor device 110 has for detecting the gas componant in the gas in measurement gas space 114 extremely
At least one sensor element 112 of a few share.Measurement gas space 114 can especially internal combustion engine exhaust apparatus simultaneously
And gas can be waste gas.Sensor element 112 especially can be provided for determining the share of the oxygen in gas.
Sensor element 112 includes at least one first electrode 116 and at least one second electrode 118.First electrode 116
Outside pump electrode can be for example configured as and the equivalent circuit diagram for Figure 1A -1C is expressed as APE.First electrode 118 is permissible
It is applied to the gas of the measurement gas compartment 114 and be for example connected with measurement gas space 114 with the layer of gas-permeable.
Second electrode 118 is arranged at least one measurement cavity 120, and described measurement cavity is not shown here.Measurement cavity 120 passes through
At least one diffusion barrier 122 is connected with measurement gas space 114.Sensor element for example can have gas inlet passages.
Measurement cavity 120 can be configured as completely or partially opening wide and can be with multi-piece construction.Such as measurement cavity 120 is permissible
Completely or partially for example alumina filled with porous.Configuration with regard to measurement cavity 120 and diffusion barrier 122 can be especially
With reference to the sensor element of prior art, it is for example in " the Sensoren im of Konrad Reif (publication side)
Described in Kraftfahrzeug " (second edition in 2012, the 160-165 page).Second electrode 118 can be configured as internal pump electricity
The pole and equivalent circuit diagram for Figure 1A -1C is expressed as IPE.First electrode 116 and second electrode 118 pass through at least one admittedly
Body electrolyte 124 (being equally not shown here) connects, and at least one solid electrolyte described is for example by the zirconium oxide that yttrium is stable
(YSZ) and/or scandium doping zirconium oxide (ScSZ) composition.With regard to solid electrolyte 124 configuration be equally referred to above-mentioned existing
There is technology.First electrode 116 and second electrode 118 form pump unit 126.
Sensor device 110 also has at least one control device 128.Control device 128 can completely or partially collect
Become in sensor element 112, or be alternatively completely or partially integrated in miscellaneous part, for example, be integrated into plug assembly
And/or in engine control system.Control device 128 passes through at least one first signal line 130 with first electrode 116 even
Connect.Control device 128 is connected with second electrode 118 by least one secondary signal circuit 132.First signal line 130 leads to
Cross at least one first anti-tampering electric capacity c1 (representing with reference 134) to be connected with ground connection 136.Secondary signal circuit 132 leads to
Cross at least one second anti-tampering electric capacity c2 (representing with reference 138) to be connected with ground connection 136.In the first signal line 130
Also arrange that and at least one of secondary signal circuit 132 and ground connection 136 between at least one measures resistance 140.First signal
Circuit 130 and/or secondary signal circuit 132 can be connected with ground connection 136 by measuring resistance 140.Preferably can include
Be provided with the connection between the first signal line 130 and/or secondary signal circuit 132 and ground connection 136 of measurement resistance 140 to
A few switch 142.Measurement resistance 140 and anti-tampering electric capacity c1 134 and/or measurement resistance 140 and anti-tampering electric capacity c2 138
Can be connected in parallel.
Control device 128 can be provided for function electric current, especially pulsed rectangular current runs pump unit 126.?
In methods described, determine the first anti-tampering electric capacity c1,134 Hes by applying multiple different on off states to pump unit 128
Second anti-tampering electric capacity c2,138.
First switch state 144 is shown in figure ia.The method according to the invention can include the first measuring process, its
In, apply first switch state 144 to pump unit 126.First switch state 144 can be no current state it is particularly possible to
Pump unit 126 applies first switch state 144 during the pulse interval of function electric current.Especially can apply to first electrode 116
Plus current source 145.Pump voltage U can be detected in the first measuring processp0And determine the first voltage on measurement resistance 140
Ug0.Arrow 146 represents pump voltage Up0Direction.Pump voltage U can be detected in the end of the pump interval of function electric currentp0.First
In measuring process it may also be determined that first electrode 116 and ground connection 136 between voltage Uca0With in second electrode 118 and ground connection 136
Between voltage Uci0.Can be to sensor element 112, especially second electrode 118 applying reference in first switch state 144
Voltage.Sensor device 110 especially can have reference voltage source 148, and described reference voltage source is provided for sensor unit
Part 112 applies reference voltage.In a preferred embodiment, reference voltage can be such as 3.3V.In secondary signal circuit
Switch 150 can be arranged between 132 and reference voltage source 148, wherein, reference voltage source 148 in the closure state of switch 150
It is connected with sensor element 112.Arrow 152 illustrates pump sense of current.
Figure 1B illustrates second switch state 154.The method according to the invention can include the second measuring process, wherein, can
To apply second switch state 154 to pump unit 126.In second switch state 154, function can be applied to pump unit 126
The current impulse of electric current, especially negative pulse, wherein, to the first anti-tampering electric capacity c1 134 and the second anti-tampering electric capacity c2 138 again
Charge.Additionally, the first signal line 130 can be connected with measurement resistance 140, wherein, switch 142 can be in the first signal line
Close and measurement resistance 140 between.In the second measuring process it may be determined that between first electrode 116 and measurement resistance 140
Voltage Uca2And the voltage Uc between second electrode 118 and measurement resistance 140i2.Voltage Uca2With voltage Uci2Can be in transient state
It is determined after process.In addition second voltage U on measurement resistance 140 can be detected in second switch state 154guaAnd
And the quantity of electric charge Q of recharge current is determined by toninggua.
The quantity of electric charge Q of recharge currentguaDetermination schematically illustrate in fig. 2.In measurement shown in the left column of Fig. 2
The possible time-varying process of ohmically voltage.Described voltage signal can include at least two component of signals.Voltage is believed
Number composition shown in the middle column of Fig. 2.First component of signal 156 can be voltage Ug0The letter following function electric current
Numerical example such as here is the voltage signal of rectangular function, and described voltage signal is shown as solid in the middle column of Fig. 2
Line.Secondary signal component 158 can be toning, and it is caused by anti-tampering recharging of electric capacity 134,138.Secondary signal component
158 are shown as fine line in the middle column of Fig. 2.Voltage UguaIntegration on the pulse duration for the voltage signal can be passed through
To determine.Voltage UguaEspecially can be determined by voltage signal integration over the integration period, the described time of integration is for example etc.
Minimum pulse duration in current impulse.The pulse duration of current impulse can be, for example, 90 μ s to 391 μ s.But
Other pulse durations are also possible in principle.The such as time of integration can be 71.04 μ s.Sensor device 110 is permissible
There is Sigma-Delta- transducer.Sigma-Delta- transducer can be provided on the time period, especially in integration
Between on voltage signal is integrated.Preferably, integration can be realized with applying connection edge with starting.Electricity by so determination
Pressure UguaThe voltage signal not having in the case of toning, the especially first component of signal can be deducted.Voltage Ug0With UguaDiffer from 160
It is shown as thick dashed line and can be with the quantity of electric charge Q of recharge current in the left column of Fig. 2guaProportional.
3rd on off state 162 is shown in fig. 1 c.The method according to the invention can include the 3rd measuring process, its
In, apply the 3rd on off state 162 to pump unit 126.Function can be applied to pump unit 126 in the 3rd on off state 162
The current impulse of electric current, especially positive pulse and anti-tampering electric capacity 134,138 is recharged.Can be true in the 3rd measuring process
Determine the voltage Uc between first electrode 116 and measurement resistance 140a1And the voltage between second electrode 118 and measurement resistance 140
Uci1.Voltage Uca1With voltage Uci1Can be determined after transient process.In addition the electricity on measurement resistance 140 can be detected
Pressure UguiAnd the quantity of electric charge Q of recharge current is determined by toninggui.Quantity of electric charge QguiDetermination can be similar to recharge current
Quantity of electric charge QguaThe determination describing in fig. 2 realizing.
Switching between different on off states can especially first switch state 144 and second switch state 154 it
Between, between second switch state 154 and first switch state 144, in first switch state 144 and the 3rd on off state 154
Between and between the 3rd on off state 162 and first switch state 144 realize.Additionally, methods described can include first
Determine step, wherein it is determined that voltage Uci0With voltage Uci2Poor dUci2With voltage Uca0With voltage Uca2Poor dUca2.Described side
Method can include the second determination step, wherein it is determined that voltage Uci1With voltage Uci0Poor dUci1With voltage Uca0With voltage Uca1
Poor dUca1.Additionally, methods described can include the 3rd determination step, wherein it is determined that anti-tampering electric capacity c1And c2.True the 3rd
Determine to determine anti-tampering electric capacity c by solving system of linear equations in step1134 and c2138.
Fig. 3 A illustrates the time-varying process of pump electric current, and sensor element 112 can be applied in described pump electric current.Sensor
Element 112 can run in pulsed is run, and wherein, applies pulse-type current in the described embodiment pump unit 126.Cause
This, in figure 3 a in time-varying process visible function electric current in the positive and negative current impulse of this rectangular current.
It is shown in the change procedure of voltage difference delta U between first electrode 116 and second electrode 118 in fig. 3 c.Not only in figure 3 a
Pump electric current and also voltage difference in fig. 3 c illustrate to cause by the recharge current of anti-tampering electric capacity 134,138 toning,
Deviation with rectangular function.
Fig. 3 C illustrates the voltage U determining in the method according to the inventionxTime-varying process.Curve 164 is shown in
The change procedure of the voltage of landing on measurement resistance 140.Curve 166 or curve 168 are shown in ground connection 136 and first electrode 116
Or the change procedure of the voltage between second electrode 118.First switch state can be applied in moment t0 to sensor element 112
144.Voltage Uc between second electrode 118 and ground connection 136i0Represented with reference 170, in first electrode 116 and ground connection
Voltage Uc between 136a0Represented with reference 172.Second switch state can be applied in moment t1 to sensor element 112
154.Voltage Uc between first electrode 116 and measurement resistance 140a2Represented with reference 174, second electrode 118 with
Voltage Uc between measurement resistance 140i2Represented with reference 176.Repeatedly can apply to sensor element 112 in moment t2
Plus first switch state 144.Furthermore, it is possible to apply the 3rd on off state 162 in moment t3 to sensor element 112.First
Voltage Uc between electrode 116 and measurement resistance 140a1Represented with reference 178, in second electrode 118 and measurement resistance 140
Between voltage Uci1Represented with reference 180.
In another operation of sensor device 110, especially have to pump unit 126 pulsed apply electric current and/or
It may be considered that what anti-tampering electric capacity 134,138 and correcting caused particularly by recharge current during the pulsed of electric current is run
Toning.Furthermore, it is possible to consider anti-tampering electric capacity 134,138 in the determination of the characteristic curve of sensor device 110.
Claims (13)
1. one kind is used for the method running sensor device (110), and wherein, described sensor device (110) has for detecting
At least one sensor element (112) of at least one share of gas componant in gas in measurement gas space (114),
Wherein, described sensor element (112) includes at least one first electrode (116) and at least one second electrode (118), its
In, described second electrode (118) is arranged at least one measurement cavity (120), and wherein, described measurement cavity (120) is passed through
At least one diffusion barrier (122) can apply the gas from described measurement gas space (114), wherein, described first electrode
(116) connected by least one solid electrolyte (124) and form pump unit (126) with described second electrode (118), its
In, described sensor device (110) also has at least one control device (128), and wherein, described control device (128) is passed through
At least one first signal line (130) is connected with described first electrode (116), and wherein, described control device (128) is passed through extremely
A few secondary signal circuit (132) is connected with described second electrode (118), and wherein, described first signal line (130) is passed through
At least one first anti-tampering electric capacity c1 (134) is connected with ground connection (136), and wherein, described secondary signal circuit (132) is passed through extremely
A few second anti-tampering electric capacity c2 (138) is connected with described ground connection (136), wherein, in described ground connection (136) and described first
Arrange between at least one of signal line (130) and described secondary signal circuit (132) that at least one measures resistance
(140), wherein, described control device (128) is provided for running described pump unit (126) with function electric current, wherein, described
The described first anti-tampering electric capacity c1 is determined by applying multiple difference on off states to described pump unit (126) in method
And described second anti-tampering electric capacity c2 (138) (134).
2. the method according to any one of the preceding claims, wherein, in another operation of described sensor device (110)
In, especially have pulsed apply electric current and/or voltage to described pump unit (126) pulsed run in consider described anti-
Interference capacitors.
3. the method according to any one of the preceding claims, wherein, in another operation of described sensor device (110)
Lieutenant colonel passes through the toning that described anti-tampering electric capacity (134,138) causes.
4. the method according to any one of the preceding claims, wherein, in the characteristic curve of described sensor device (110)
Determination in consider described anti-tampering electric capacity (134,138).
5. the method according to any one of the preceding claims, wherein, the method comprising the steps of：
Iii) the first measuring process, wherein, applies first switch shape in described first measuring process described pump unit (126)
State (144), wherein, detects pump voltage U in described first measuring processp0And determine on described measurement resistance (140) the
One voltage Ug0, wherein, described first measuring process also determines that described first electrode (116) and described ground connection (136) in addition
Between voltage Uca0And the voltage Uc between described second electrode (118) and described ground connection (136)i0；
Iv) the second measuring process, wherein, applies second switch shape in described second measuring process described pump unit (126)
State (154), wherein, determines between described first electrode (116) and described measurement resistance (140) in described second measuring process
Voltage Uca2And the voltage Uc between described second electrode (118) and described measurement resistance (140)i2, wherein, in addition in institute
State second voltage U on described measurement resistance (140) for the detection in second switch state (154)guaAnd can be determined by toning
The charge volume Q of recharge currentgua；And
V) the 3rd measuring process, wherein, applies the 3rd on off state in described 3rd measuring process described pump unit (126)
(162), wherein, determine in described 3rd measuring process between described first electrode (116) and described measurement resistance (140)
Voltage Uca1And the voltage Uc between described second electrode (118) and described measurement resistance (140)i1, wherein, can detect
Voltage U on described measurement resistance (140)guiAnd the charge volume Q of recharge current is determined by toninggui.
6. the method according to any one of the preceding claims, wherein, gives described in described second switch state (154)
The current impulse of pump unit (126) applying function electric current, especially negative pulse, wherein, to described anti-tampering electric capacity (134,138) again
Charge.
7. the method according to any one of the preceding claims, wherein, gives described in described 3rd on off state (162)
Pump unit (126) applies the current impulse of described function electric current, especially positive pulse, wherein, to described anti-tampering electric capacity (134,
138) recharge.
8. the method according to any one of three above claim, wherein, methods described also has steps of：
Iv) the first determination step, wherein it is determined that voltage Uci0With voltage Uci2Between poor dUci2With in voltage Uca0With voltage
Uca2Between poor dUca2；
V) the second determination step, wherein it is determined that voltage Uci0With voltage Uci1Between poor dUci1With in voltage Uca0With voltage Uca1
Between poor dUca1；
Vi) the 3rd determination step, wherein it is determined that described anti-tampering electric capacity c1And c (134)2(138).
9. the method according to any one of the preceding claims, wherein, determines in step by solving line the described 3rd
Property equation group is determining described anti-tampering electric capacity c1And c (134)2(138).
10. the method according to any one of the preceding claims, wherein, described sensor device (110) has Sigma-
Delta- transducer, wherein, methods described has gamma correction.
A kind of 11. computer programs, it is provided for implementing each of the method according to any one of the preceding claims
Step.
A kind of 12. electronic storage mediums, the computer program being stored with thereon according to above claim.
A kind of 13. control electronics, it includes the electronic storage medium according to above claim.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014211321.0A DE102014211321A1 (en) | 2014-06-13 | 2014-06-13 | Method for operating a sensor device |
| DE102014211321.0 | 2014-06-13 | ||
| PCT/EP2015/062007 WO2015189055A1 (en) | 2014-06-13 | 2015-05-29 | Method for operating a sensor apparatus |
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| CN106461599B CN106461599B (en) | 2019-05-03 |
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|---|---|
| EP (1) | EP3155411A1 (en) |
| KR (1) | KR102383817B1 (en) |
| CN (1) | CN106461599B (en) |
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|---|---|---|---|---|
| CN108956862A (en) * | 2017-05-18 | 2018-12-07 | 罗伯特·博世有限公司 | The method of the appearance of open-circuit line in the sensor for identification |
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| DE102007062800A1 (en) * | 2007-12-27 | 2009-07-02 | Robert Bosch Gmbh | Method for determining a gas composition in a sample gas space |
| CN102016557A (en) * | 2008-05-09 | 2011-04-13 | 罗伯特.博世有限公司 | Evaluation and control unit for a broadband lambda probe |
| DE102010000663A1 (en) * | 2010-01-05 | 2011-07-07 | Robert Bosch GmbH, 70469 | Device for controlling and evaluating exhaust gas sensor used in combustion engine, has reference current source which is connected with corresponding electrode terminals and measuring terminal at respective switching frequencies |
| WO2013092018A1 (en) * | 2011-12-21 | 2013-06-27 | Robert Bosch Gmbh | Method for monitoring a broadband lamdba probe |
| DE102012220567A1 (en) * | 2012-11-12 | 2014-06-12 | Robert Bosch Gmbh | Method for operating a sensor element |
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| DE19947240B4 (en) * | 1999-09-30 | 2004-02-19 | Robert Bosch Gmbh | Method for operating a mixed potential exhaust gas probe and circuit arrangements for carrying out the method |
| JP4325684B2 (en) | 2007-02-20 | 2009-09-02 | 株式会社デンソー | Sensor control apparatus and applied voltage characteristic adjusting method |
-
2014
- 2014-06-13 DE DE102014211321.0A patent/DE102014211321A1/en active Pending
-
2015
- 2015-05-29 KR KR1020167034784A patent/KR102383817B1/en active IP Right Grant
- 2015-05-29 EP EP15729362.2A patent/EP3155411A1/en not_active Ceased
- 2015-05-29 CN CN201580031474.5A patent/CN106461599B/en active Active
- 2015-05-29 WO PCT/EP2015/062007 patent/WO2015189055A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007062800A1 (en) * | 2007-12-27 | 2009-07-02 | Robert Bosch Gmbh | Method for determining a gas composition in a sample gas space |
| CN102016557A (en) * | 2008-05-09 | 2011-04-13 | 罗伯特.博世有限公司 | Evaluation and control unit for a broadband lambda probe |
| DE102010000663A1 (en) * | 2010-01-05 | 2011-07-07 | Robert Bosch GmbH, 70469 | Device for controlling and evaluating exhaust gas sensor used in combustion engine, has reference current source which is connected with corresponding electrode terminals and measuring terminal at respective switching frequencies |
| WO2013092018A1 (en) * | 2011-12-21 | 2013-06-27 | Robert Bosch Gmbh | Method for monitoring a broadband lamdba probe |
| DE102012220567A1 (en) * | 2012-11-12 | 2014-06-12 | Robert Bosch Gmbh | Method for operating a sensor element |
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| CN108956862A (en) * | 2017-05-18 | 2018-12-07 | 罗伯特·博世有限公司 | The method of the appearance of open-circuit line in the sensor for identification |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170018328A (en) | 2017-02-17 |
| KR102383817B1 (en) | 2022-04-08 |
| WO2015189055A1 (en) | 2015-12-17 |
| CN106461599B (en) | 2019-05-03 |
| EP3155411A1 (en) | 2017-04-19 |
| DE102014211321A1 (en) | 2015-12-17 |
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