CN106461599B - Method for running sensor device - Google Patents
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- CN106461599B CN106461599B CN201580031474.5A CN201580031474A CN106461599B CN 106461599 B CN106461599 B CN 106461599B CN 201580031474 A CN201580031474 A CN 201580031474A CN 106461599 B CN106461599 B CN 106461599B
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- 238000005259 measurement Methods 0.000 claims abstract description 99
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- 239000007784 solid electrolyte Substances 0.000 claims abstract description 13
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- 230000004888 barrier function Effects 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims description 39
- 238000001514 detection method Methods 0.000 claims description 16
- 238000012937 correction Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 64
- 230000006870 function Effects 0.000 description 27
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- 230000005611 electricity Effects 0.000 description 13
- 230000010354 integration Effects 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 6
- 230000001052 transient effect Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 229910052727 yttrium Inorganic materials 0.000 description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 239000011195 cermet Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910052706 scandium Inorganic materials 0.000 description 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
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- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000018199 S phase Effects 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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Classifications
-
- 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
The present invention proposes a kind of method for running sensor device (110), wherein, the sensor device (110) has at least one sensor element (112) of at least one share for detecting the gas componant in the gas in measurement gas space (114), wherein, the sensor element (112) includes at least one first electrode (116) and at least one second electrode (118), wherein, the second electrode (118) is arranged at least one measurement cavity (120), wherein, the measurement cavity (120) can apply the gas from the measurement gas space (114) by least one diffusion barrier (122), wherein, the first electrode (116) and the second electrode (118) pass through at least one solid electrolyte (124) it connects and forms pump unit (126), wherein, the sensor device (110) also has at least one control device (128), wherein, the control device (128) is connect by least one first signal line (130) with the first electrode (116), wherein, the control device (128) is connect by least one second signal route (132) with the second electrode (118), wherein, first signal line (130) is connect by least one first anti-tampering capacitor c1 (134) with ground connection (136), wherein, the second signal route (132) is connect by least one second anti-tampering capacitor c2 (138) with the ground connection (136), wherein, the ground connection (136) with it is described At least one measurement resistance (140) is arranged between at least one of first signal line (130) and the second signal route (132), wherein, control device (128) setting is for running the pump unit (126) with function electric current, wherein, the described first anti-tampering capacitor c1 (134) and the second anti-tampering capacitor c2 (138) are determined by applying multiple and different switch states to the pump unit (126) in the method.
Description
Background technique
The method for being become known for running sensor device in principle by the prior art.It can be with by such sensor device
Realize the qualitative detection and/or quantitative detection of the gas componant of gas, gas componant especially in air fuel mixture
Detection.It however alternatively or additionally, can also be by times of the gas characteristic of such sensor device detection gas, such as gas
Physical characteristic of anticipating and/or chemical characteristic.It also can detecte multiple characteristics of gas in principle.It especially can be by such sensor
Equipment application is in automotive field.The gas for example can be the exhaust 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 detection gas
Element.Such as sensor element can be such as at " the Sensoren im Kraftfahrzeug " of Konrad Reif (publication side)
It is configured as lambda seeker described in (second edition in 2012, the 160-165 pages).Lambda seeker can not only be configured as two o'clock
Formula lambda seeker and it is configured as broadband lambda seeker, especially the broadband lambda seeker of plane.Burning can be determined by lambda seeker
The gas share of admixture of gas in room, such as air coefficient λ, the air coefficient illustrate air-fuel ratio.By two
Only (λ=1) determines that air-fuel ratio is possible to point type lambda seeker in the mixing of stoichiometry in tight narrow range
's.In contrast, by broadband lambda seeker --- its generally according to the principle of pump unit (Pumpzell), preferably in combination with electrification
Ernest & Whitney cell operation in learning --- the determination in the big range of λ may be implemented.Such ceramic sensor element is based on
The application of the electrolyte properties of determining solid is particularly based on the characteristic of the ionic conduction of the solid.These sensor elements are big
It include the ceramiic solid electrolyte being preferably made of zirconium and/or yttrium or the solid layer being preferably made of zirconium dioxide more.
Such pump unit can be by two electrodes 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 setting is for applying pump electric current to pump unit.
Such as sensor element can be run with direct current or in pulsed operation.Such as 10 2,008 001 697A1 of document DE is retouched
State: pump electric current can be the pump electric current of pulse form, with fixed frequency, variable duty ratio and adjustable sign
(Vorzeichen).The pulsed that the operation by such pump electric current of sensor element can be referred to as sensor element is transported
Row.
In principle can in signal line, for example in the cable bundle of sensor device be equipped with anti-tampering capacitor be used for into
Row protection is for example from the static state charging of the electronic device of sensor device.As known to 10 2,010 000 663A1 of document DE
It is that, in order to which the High-frequency Interference and high voltage that are buffered between the signal line and ground connection of broadband lambda seeker enter, electricity can be equipped with
Container.Constantly these capacitors can be recharged in the pulsed operation of sensor element.Recharge current a part stream
Pump unit through sensor element and increase or decrease pump electric current and must indicatrix calibration in be considered.
In addition, describing a kind of to recharge correction feature curve for calibrating in 10 2010 000663A1 of document DE
Method.It is as follows to cause by periodically switching between two switch states Z_1 and Z_2: i.e. in the lambda seeker of broadband
Portion pump electrode connecting pin IPE and on external pump electrode connecting pin APE there are pulse form pump electric current ISQ.The position of the switch Z_1 and Z_2
It is can be realized herein in resistance RGNDOn voltage drop UGNDEdge trigger measure and to calibrate recharge correction.Capacitor
Recharge process is mapped to through resistance RGNDBy on electric current.In resistance RGNDThe electricity for position of the switch Z_1 of upper landing
Press UguaWith the voltage U for position of the switch Z_2guiTherefore comprising recharging information.Recharge current dIumBe for calibration most
Important share and pass through dI in 10 2010 000663A1 of document DEum=Fum·(Ugui-Ugua/RGNDS) calculate, wherein
Fum=Tsd/Tp.Here, TsdIt is the duration (time of integration) of measurement conversion, TpIt is to continue the clock cycle that pulsed is run
Time, and RGNDSIt is the desired value of resistance.
It can not consider recharge current I in principlepumIn the case where by sensor device constant-current source it is set
Effective duty cycle IPS and measured electric current, which calculate, averagely pumps electric current Ip0: Ip0=IPSIsq, wherein effectively duty ratio is
IPS=(Tp-Tm)/Tcyclus。TcyclusIt is the duration of measurement period, such as T hereincyclusIt can be=666 μ s.TpAnd Tm
It is the duration for applying positive current pulses and negative current pulse to sensor device respectively.Considering recharge current Ipum's
In the case of, it can be by Ip=Ip0+IpumIt determines and averagely pumps electric current Ip.Three can be applied to sensor device in measurement period
Switch state, wherein positive current pulses can be applied to sensor device in first switch state, in second switch state
Apply negative current pulse to sensor device, and apply pulse interval to sensor device in third switch state, wherein
Electric current is not applied to sensor device.Such as pulse interval can be applied to sensor device first, such as with fixed 185
The duration of μ s.And then it can apply another switch state, such as negative current pulse to sensor device.It and then again can
To apply another pulse interval to sensor device.The duration of pulse interval can be variable herein and for example, exist
Between 0 and 301 μ s.Another switch state, such as positive current pulses can be applied to sensor device after pulse interval.Tool
There is the duration of the switch state of positive or negative current impulse to can be herein variable.Such as the duration can be in 90 μ s
Between 391 μ s.Each variation of switch state can cause to recharge variation on anti-tampering capacitor
(Umladespannungshub).It can be by being done between two switch states anti-for each quantity of electric charge for recharging offset
The voltage difference disturbed on capacitor determines.Here, can will be respectively used to determine the difference in the voltage of switch state end.For
The quantity of electric charge dQ of each switch state variationsxIt can be by the voltage difference dUsx between two switch states multiplied by anti-tampering capacitor
Corresponding capacitance value cnIt determines: dQsx=cn·dUsx.The average recharge current I of switch state variationumsxIt can be by Iumsx=
dQsx/TcyclusIt determines.Recharged if currently all --- electric current recharged flows through sensor element --- it is cumulative, can be with
Determine the total recharge current I for passing through sensor elementpum.The recharge current can be considered in the calculating of probe current,
The correction of detection stream especially may be implemented.Such as different current impulses can be applied to sensor element in pulsed operation
Mode (timing mode), such as pulse-back pulse, current impulse mode (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 be may is that
Ipum=[ci(Ui2-Uref)+ca(Ua2-Uref-Up0)]/Tcyclus,
Wherein, UrefIt is the desired value of the reference voltage of sensor device, and Up0It is the value of the pump voltage in pulse interval.
Ui2And Ua2Be in switch state, the voltage value of the end of such as switch state with negative current pulse, wherein can survey
Measure the voltage U between external electrode and ground connectiona2And the voltage U between interior electrode and ground connection can be measuredi2.In addition, ciAnd caIt is
The capacitance of anti-tampering capacitor.In timing mode 2, the updating formula of recharge current be may is that
Ipum=[ci(Ui2+Ui4-2-Uref)-2ca(Ua2+Uref+Up0)]/Tcyclus,
Wherein, Ui4It is the voltage value at a switch state end, such as switch state with positive current pulses.For
Determining updating formula, however, it would be possible to for the desired value of the capacitance application component of anti-tampering capacitor.
It is known it is described for calibrating, the method for especially indicatrix calibration it is related with the capacitance of anti-tampering capacitor.It is former
It can be for the desired value of the capacitance application component on then.However the sample distribution, possible of capacitance is not considered herein
Temperature-responsive (Temperaturgang) and possible long time drift.However the application can be required to be less than ± 10
The pump current precision of μ A.In the case where λ=1 until under ± 30% capacitance tolerance, by means of the desired value of anti-tampering capacitor
Calibration can cause pump electric current inexactness.It therefore can be in voltage change process, especially in the voltage change of pump voltage
Occurs toning in the processToning may be unacceptable for application.
Summary of the invention
It is therefore proposed that a kind of method for running sensor device, the method at least avoid known method as far as possible
Predictable disadvantage.It should especially realize the pump current precision less than ± 10 μ A.
Sensor device can be interpreted as to any following equipment in principle, the equipment setting is used for detection gas ingredient
Share, especially in admixture of gas, such as in measurement gas space, such as example in the exhaust apparatus of internal combustion engine.It passes
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.The sensor element of at least one share for the gas componant in detection gas can be understood as following member
Part, the element be, for example, the component part of sensor device, is arranged or can contribute to the gas componant of probe gas
Share.Possibility configuration about sensor element can be in principle referring to the above-mentioned prior art.Sensor element can be especially
Ceramic sensor element, especially with the ceramic sensor element of layered structure.Sensor element especially can be 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 quantitative detection.However in principle, sensor element can be set for any physical characteristic of detection gas and/or change
Learn the particle in characteristic, such as the temperature and/or pressure and/or gas of gas.Other characteristics are also detectable in principle.Gas
Body can be arbitrary gas, such as exhaust gas, air, air-fuel mixture or other gases in principle.The present invention is especially useful
In automotive field, so that gas especially can be air-fuel mixture.Generally, gas space will can be measured
Between be interpreted as such as down space: gas to be detected is located in the space.The present invention is used especially for machine as above implementing
In motor-car technical field, so that measurement gas space especially can be 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 about sequence and/or about whether for example there is also the conclusions of other electrodes.Generally,
Electrode can be understood as the conductive region of sensor element, and the region can for example be applied current or voltage.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
The storage of the gas componant for carrying out gas can be set in chamber, the cavity.Measurement cavity can be configured as fully or portion
It opens wide with dividing.In addition, measurement cavity can completely or partially be filled with such as porous media, such as porous aluminium oxide.Example
Such 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 can be with
Be interpreted as the layer being made of following material: the material promotes or can be realized gas and/or liquid and/or ion expansion
It dissipates, but inhibits gas and/or liquid flowing.Diffusion barrier can especially have porous ceramic structure, especially have
Porous ceramic structure through the bore dia targetedly adjusted.Diffusion barrier can have diffusional resistance, wherein diffusional resistance
It can be regarded as following resistance, diffusion barrier reacts on diffusion flow with the resistance.
First electrode is connected by least one solid electrolyte with second electrode and forms pump unit.Solid electrolyte
Can especially ceramiic solid electrolyte, such as the oxygen of zirconium oxide (YSZ) and/or scandium doping that zirconium oxide, especially yttrium are stable
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 especially can be region that can be conductive, such as metal coating that can be conductive, and the region can apply
It is added at least one solid electrolyte and/or can otherwise contact solid electrolyte.It especially can be by applying electricity
Oxygen is passed through diffusion barrier to the first and second electrodes and pumped into measurement cavity or by it from gas by pressure, especially pump voltage
It pumps out.
Sensor device also has at least one control device.Control device can be understood as following equipment, the equipment
It is arranged for running sensor element.Control device can be center or dispersion.Control device may include at least one
Data processing equipment, for example, at least a processor, especially at least a microcontroller fill device.Control device can for example fully
Or it is partially integrated into another equipment, such as in control equipment and/or device for controlling engine.Sensor element can have
At least one interface, at least one described interface can be connect with control device.For example, control device can also fully or portion
It is integrated into sensor element or is alternatively completely or partially integrated into the other component of sensor device with dividing, such as
In plug assembly.
Control device is connect by least one first signal line with first electrode.First signal line can be managed in principle
Solution is any connection of control device and first electrode, and the connection is arranged for by 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 connect by least one second signal route with second electrode.Second signal route can be managed in principle
Solution is any connection of control device and second electrode, and the connection is arranged for by 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 capacitor c1 and grounding connection.Second signal route is by extremely
A few second anti-tampering capacitor c2 and grounding connection.Ground connection can be understood as conductive member in principle, and the component has ginseng
Examine current potential, especially 0 volt of current potential.Title " first " and " second " anti-tampering capacitor are used as pure title and are not especially about suitable
Sequence and/or about whether for example there is also the conclusions of other anti-tampering capacitors.First and second anti-tampering capacitors in principle can be with
It is interpreted as any capacitor, the capacitor setting enters for buffered hf interference and high pressure, especially relative to grounding lead
It leads High-frequency Interference and high pressure enters and thereby, it is ensured that protection is for example charged from static state.
At least one survey is furthermore arranged between ground connection at least one of the first signal line and second signal route
Measure resistance.Measurement resistance can be understood as arbitrary Ohmic resistance in principle, and electric current can be implemented on it and/or voltage is surveyed
Amount.First signal line and/or second signal route can can be connect by measurement resistance with ground connection.Preferably, Ke Yi
At least one switch is equipped in the connection between first and/or second signal route and ground connection including measurement resistance.Switch
It can be understood as arbitrary, especially conductive component, the component setting is for especially electrical connection first and/or second signal
Route and measurement resistance and ground connection, and/or the connection of separation first and/or second signal route and measurement resistance and ground connection.Example
Such as switch can connect in closed state first and/or second signal route with measure resistance and ground connection, and in open shape
Separation first and/or second signal route and measurement resistance and ground connection in state.
Measurement resistance and the second anti-tampering capacitor c2 can be connected in parallel.It measures resistance and the second anti-tampering capacitor c2
The electrode of identical name can be especially connected with each other.Measurement resistance and the first anti-tampering capacitor c1 can be connected in parallel.
Control device setting is for running pump unit with function electric current.Function electric current can be understood as any as follows in principle
Electric current: the 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.Such as function electric current can be selected from by with the following group
At group: sinusoidal function electric current, rectangular current, delta current, saw-tooth current.In principle, function electric current also can have
Other change procedures." running pump unit with function electric current " is in principle it is to be understood that control device can be set 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 not apply current impulse to pump unit in an interval.
Determined in the method by applying multiple and different switch states to pump unit the first anti-tampering capacitor c1 and
Second anti-tampering capacitor c2.Control device especially can have switch, it is preferable that control device can have multiple switch.Make
Above-mentioned switch can be equipped in the connection between second signal route and ground connection for including measurement resistance for first switch.This
Outside, second switch can be set in sensor element and the connection between the following reference voltage source that will be described further
In.Switch state by the state of electronic component, especially at least two states switched and/or can pass through pump electric current in principle
Flow direction limit.First anti-tampering capacitor c1And the second anti-tampering capacitor c2Determination can be understood as in principle
In the operation of sensor device capacitance is sought, and is especially sought with the deviation of the desired value of anti-tampering capacitor.
In another operation of the sensor device, especially applying electric current and/or voltage to described with pulsed
The anti-tampering capacitor is considered in the pulsed operation of pump unit.It especially can be in another operation lieutenant colonel of the sensor device
Pass through toning caused by the anti-tampering capacitor.First and second anti-tampering capacitors can be in the operation of the pulsed of detector
It is recharged according to the application of positive or negative pulse.Such recharge can lead to additional electric current, especially recharge current,
It can be improved or reduce pump electric current.Such variation of pump electric current can lead to the voltage change in the pump voltage of sensor element
Toning in the process.
Furthermore, it is possible to consider anti-tampering capacitor in the determination of the indicatrix of sensor device.The spy of sensor device
Sign curve can be understood as the relationship of pump voltage Yu air coefficient λ.It especially can be in the determination of the indicatrix of sensor device
Middle consideration pump electric current passes through variation and the resulting toning in voltage change process caused by recharge current.
The method may include following steps:
A) the first measuring process, wherein apply first switch state to the pump unit in first measuring process
z0, wherein pump voltage U is detected in first measuring processp0And determine the ohmically first voltage U of measurementg0,
In, the voltage Uc between the first electrode and the ground connection is additionally determined in first measuring processa0With described
Voltage Uc between second electrode and the ground connectioni0；
B) the second measuring process, wherein apply second switch state to the pump unit in second measuring process
z2, wherein the voltage Uc between the first electrode and the measurement resistance is being determined in second measuring processa2With institute
State the voltage Uc between second electrode and the measurement resistancei2, wherein furthermore detect in the second switch state described
Measure ohmically voltage UguaAnd the charge volume Q of recharge current can be determined by toninggua；And
C) third measuring process, wherein apply third switch state to the pump unit in the third measuring process
z1, wherein the voltage Uc between the first electrode and the measurement resistance is being determined in the third measuring processa1With institute
State the voltage Uc between second electrode and the measurement resistancei1, wherein it is able to detect in the ohmically voltage U of measurementgui
And the charge volume Q of recharge current is determined by toninggui。
These method and steps can be for example with sequence implementation.It but 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 " third step
Suddenly it is used as pure title " and is not especially about sequence and/or about whether for example there is also the conclusions of other measuring process.
It can be in the 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 one in pulse interval realize apply current impulse again before at the time of.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: current impulse is not applied to pump unit in the state.The second switch especially in first switch state
It can have closed state and therefore apply reference voltage to sensor element.Reference voltage in pulse interval can be with principle
Upper so selection, so that voltage is greater than the negative polarization as maximum as possible of pump unit.Therefore it can prevent: the current potential of first electrode
Drop under the current potential of ground connection.Reference voltage can especially be greater than 2V.Preferably, reference voltage can be 3.3V.Sensor
Equipment especially can have analog-digital converter, and the analog-digital converter has the reference voltage of 3.3V.It is true in voltage
In fixed, the voltage between the other element of sensor device can refer to the 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 Uci2It can be determined after transient process (Einschwingvorgang).Voltage Uca1
With voltage Uci1It can be determined after transient process.Transient process can be understood as until reach pump voltage value it is lasting when
Between, have and the deviation less than 20% of the quiescent value of pump voltage, preferably smaller than 15% deviation and particularly preferably has
Have and the deviation less than 10% of the quiescent value of pump voltage.In principle voltage can also be realized in the case where no transient process
It determines.
In order to accurately determine voltage, it is necessary to measure the end-state of first switch state in principle.It cannot usually realize
The accurate measurement of end-state.Preferably, the averaging of voltage value, such as asking on 70 μ s may be implemented in the method
It is average.Resulting detection error can be moved with the depolarization (Depolarisation) of the pump voltage in pulse interval to be had
It closes.Measurement period can be understood as the following period: method and step a)-c can be implemented in the period) at least one
It is a.Method and step a)-c) it can implement all in a measurement period or can be individually respectively in a measurement period
Implement.Preferably, measurement period can be 666 μ s long.
In second switch state, first electrode can be connect with measurement resistance.Especially can the first signal line with
Between ground connection includes that at least one switch is equipped in the connection of measurement resistance, at least one described switch is in second switch state
In can be realized first electrode and measure resistance connection.In second switch state, can be negative to sensor element application
Current impulse flow to first electrode from second electrode to pump electric current.In second switch state, function can be applied to pump unit
The current impulse of energy electric current, especially negative pulse, wherein recharged to anti-tampering capacitor.Positive pulse can be understood as following pulse:
Electric current flow to second electrode by first electrode and flow to measurement resistance by switch in the case where the pulse.Compared to it
Under, electric current flow to first electrode by second electrode and flow to measurement resistance by switch in the case where negative pulse.
Recharging for anti-tampering capacitor is realized in the case where can switching especially between different switch states.Preferably may be used
With realize first switch state and second switch state, second with first switch state, first with third switch state and
Switching between third and first switch state.
In third switch state, second electrode can be connect with measurement resistance.First switch can especially be closed and
Ensure second electrode and measures the connection of resistance.In third switch state, positive current pulses can be applied to sensor element,
Second electrode is flow to by first electrode to pump electric current.In third switch state, function electric current can be applied to pump unit
Current impulse, especially positive pulse, and can be recharged to anti-tampering capacitor.
As set forth above, it is possible to determine 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 UguaIt can be by voltage signal in pulse persistance
Between on integral determine.Voltage UguaIt especially can be by maximum 100 μ s, preferably at most 80 μ s and particularly preferably about
Integral on the time of integration of 71 μ s determines, such as 70 ± 5 μ s.In a preferred embodiment, the time of integration can be with
For 71 μ s.Be longer than 71 μ s the time of integration be also possible in principle it is possible.Sensor device can have Sigma-Delta-
Converter.Sigma-Delta- converter can be set in the period, especially over the integration period in measurement resistance
The voltage signal of upper detection integrates.Preferably, since integral can come real applying connection edge (Einschaltflanke)
It is existing.Connecting edge can be understood as the behavior of the pump voltage when applying current impulse.By the voltage U so determinedguaIt can subtract
Voltage signal in the case where no toning.It especially can be by voltage UguaSubtract the voltage determined in first switch state
Ug0, wherein function electric current can have identical value in the voltage measurement in the first and second switch states.Sensor device can
To have at least one current source, at least one described current source be can be set for all measurements in different switch states
Middle feed-in same current.Current source can especially constant-current source.The especially voltage responsive of deviation such as at least one current source
(Spannungsgang) it can produce measurement error.Voltage Ug0With UguaDifference can with the quantity of electric charge of recharge current at than
Example.The quantity of electric charge especially can be Qgua=(Ugua-Ug0)·Tadc/Rgnds, wherein TadcIt is the conversion of Sigma-Delta- converter
Device time, and RgndsIt is the desired value for measuring resistance.In one embodiment, the converter time can be 70 μ s.
Similar determination can be about the quantity of electric charge Q of recharge currentguiIt realizes.The quantity of electric charge especially can be Qgui=
(Ugui-Ug0)·Tadc/Rgnds。
Sensor device can be set for implementing quantity of electric charge QguiAnd QguaDetermination.Sensor device, which can be set, to be used for
Methods && steps of implementation a)-c).Sensor device, which can be set, is used at the beginning of control is used for measurement period and/or switchs shape
Transformation between state preferably accurately controls μ s.In a kind of preferred embodiment of sensor device, sensor device can be with
With the combination being made of simulation low-pass filter and Sigma-Delta- converter.In principle also it is contemplated that other configurations.Example
It such as can be with application simulation integrator, wherein with the end value of scanner analogue integrator and can be AD converted.
The measured quantity of electric charge Q of recharge currentguaAnd QguiThe expected quantity of electric charge recharged can be compared.
The method can also have follow steps:
I) first step is determined, wherein determine voltage Uci0With voltage Uci2Between poor dUci2With in voltage Uca0With electricity
Press Uca2Between poor dUca2；
Ii) second step is determined, wherein determine voltage Uci0With voltage Uci1Between poor dUci1With in voltage Uca0With electricity
Press Uca1Between poor dUca1；
Iii) third determines step, wherein determines the anti-tampering capacitor c1And c2。
These method and steps can for example be implemented with the sequence.It but 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 determine step ", " second determines step " and
" third determines step " is used as pure title and is walked about sequence and/or about whether for example determining there is also other
Rapid conclusion.
It is determined in step in third, can determine anti-tampering capacitor c by solving system of linear equations1And c2.It especially can be with
Anti-tampering capacitor is determined by solving following equation group:
d∪ci2·c1+d∪ca2·c2=Qgua
d∪ci1·C1+d∪ca1.c2=Qgui。
The accurate determination of anti-tampering capacitor may be implemented in the case where big toning.When recharging for anti-tampering capacitor
The area of journey that is, area under toning is so big, so that the tolerance of switch time has shadow as small as possible to result
It rings and recharges when overcharge no longer than the time of integration, the accurate determination of anti-tampering capacitor may be implemented.In principle, by existing
There is technology is known to run sensor element with 16 milliamperes of electric current, wherein measurement resistance is 100 Ω.Within the scope of this invention
It has been confirmed that being advantageously, running sensor element with electric current as small as possible.Electric current as small as possible is for example understood that
For less than 16 milliamperes, preferably smaller than 12.5 milliamperes and particularly preferred 10 milliamperes of electric current.However, other electric currents are also possible
's.Such as sensor device can have adjustable current source, the current source can be realized for running sensor element
Electric current adjusting and therefore can be realized adjustment (Einstellung).It in a preferred embodiment, can be with 10
The electric current of milliampere runs sensor element.However other electric currents are also possible.In the preferred embodiment, measurement electricity
Resistance can have the resistance of such as 100 Ω, and the resistance of sensor element can be such as 26 Ω.However other resistance are also
It is possible.The voltage Uc of such as 3.3V to 1.26V can be recharged in the determination of anti-tampering capacitori(1/2).However other voltages
It is also possible.It, can be such in order to ensure the measurement of pump voltage is in the case where electric current drops to 10 milliamperes and possible
The duration for selecting the pulse interval in positive pulse, especially before third switch state, allow to implement pump voltage measurement.
Preferably, sensor element can be adjusted in operation in λ=1 and be run, and pump current requirements can be very low in adjusting operation.Cause
This can be prevented: the duration of pulse interval does not become excessive compared to the overall measurement period.The duration of pulse interval
It especially can be 15%, preferably 10% and particularly preferred the 5% of measurement period.Further preferably, pump voltage can be multiple
Variation is not realized in switch periods, because voltage value to be detected can distribute in time on multiple periods.However principle
On can be realized the variation in 10%, preferably 5% and particularly preferred the 1% of pump voltage range.Pump voltage can λ=
1 is particularly stable after and passes through period less stable in λ=1.Switch periods can be understood as being selected from herein
At least one switch state of first, second, and third switch state with it is another selected from the first, second, and third switch state
Switching between switch state.
Sensor device can have Sigma-Delta- converter as described above, wherein method can have non-
Linearity correction.In principle, true Sigma-Delta- converter, which can not be, linearly describes non-static signals, but compares
Signal is described with being only distorted in ideal Sigma-Delta- converter, so that the gamma correction of voltage value can be necessity
's.Gamma correction can realize that correction function can be related with anti-tampering capacitor by correction function.Correction function can be with
It is realized by comparing true Sigma-Delta- converter and the ideal Sigma-Delta- converter of simulation.In order to
Anti-tampering capacitor really periodically between also ensure that the functional mode of Sigma-Delta- converter, therefore anti-tampering capacitor may be implemented
Recurrence determine.It can especially realize in the first aligning step and come by not corrected Sigma-Delta- transducer signal
It determines not corrected anti-tampering capacitor and implements gamma correction by not corrected anti-tampering capacitor.In another school
Corrected poor (the U of voltage value can be determined in positive stepgui-Ug0) and (Ugua-Ug0) and realize corrected anti-tampering electricity
The determination of appearance.These aligning steps especially individually or both can repeatedly be implemented, to realize gamma correction institute's phase
The precision of prestige.
A kind of sensor device is proposed in another aspect of the invention.The sensor device has for detecting measurement
At least one sensor element of at least one share of the gas componant in gas in the gas compartment.The sensor element
Including at least one first electrode and at least one second electrode, wherein it is empty that the second electrode is arranged at least one measurement
In chamber.The measurement cavity can apply the gas from the measurement gas space by least one diffusion barrier.Described
One electrode is connected by least one solid electrolyte with the second electrode and forms pump unit.The sensor device is also
With at least one control device, at least one described control device passes through at least one first signal line and first electricity
Pole connection.The control device is connect by least one second signal route with the second electrode.First signal wire
Road passes through at least one first anti-tampering capacitor c1 and grounding connection.The second signal route is second anti-dry by least one
Disturb capacitor c2 and the grounding connection.In the ground connection and first signal line and the second signal route at least
At least one measurement resistance is arranged between one.The control device setting is for running the pump unit with function electric current.
Implementation of the sensor device setting for implementing also to will be evident from according to one of above embodiment or below
The method of one of mode.Such as control device can be correspondingly arranged for for example implementing the method by programming technique.
For the possible configuration of sensor device can correspondingly reference method foregoing description.
The invention further relates to a kind of computer program and a kind of electronic storage medium and control electronics, the calculating
The setting of machine program is stored in the Electronic saving for implementing each step according to the method for the present invention, the computer program
On medium, the control electronics include the electronic storage medium.
Invention advantage:
The method compared with the prior art in known method be advantageous.The reality of anti-tampering capacitor can especially be sought
Actual value and sample distribution, temperature-responsive and the long time drift that anti-tampering capacitor is therefore considered in indicatrix calibration.
It is also used for applying as follows furthermore, it is possible to therefore can be realized sensor device: ± 10 μ A can be needed to be less than in the application
Pump current precision.
Detailed description of the invention
Attached drawing is shown:
Figure 1A -1C: for implementing the equivalent circuit of sensor device according to the method for the present invention in three switch states
Figure；
Fig. 2: the schematic overview of the determination of recharge current；
Fig. 3 A-3C: the time-varying process, the voltage change process on the first and second electrodes and the first electricity of electric current are pumped
The change procedure of the voltage difference of the voltage of pole and second electrode.
Specific embodiment
It is shown in three switch states in Figures IA-1 C for implementing sensor device 110 according to the method for the present invention
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 exhaust gas.The share for determining the oxygen in gas especially can be set in sensor element 112.
Sensor element 112 includes at least one first electrode 116 and at least one second electrode 118.First electrode 116
External pump electrode can be for example configured as and APE is expressed as the equivalent circuit diagram of Figure 1A -1C.First electrode 118 can be with
It is applied to the gas of the measurement gas compartment 114 and is for example connect with the layer of gas-permeable with measurement gas space 114.
Second electrode 118 is arranged at least one measurement cavity 120, and the measurement cavity is not shown here.Measurement cavity 120 passes through
At least one diffusion barrier 122 is connect 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 can be with
Completely or partially for example with porous alumina filled.Configuration about measurement cavity 120 and diffusion barrier 122 can be especially
Referring to the sensor element of the prior art, such as " the Sensoren im in Konrad Reif (publication side)
Description in Kraftfahrzeug " (second edition in 2012, the 160-165 pages).Second electrode 118 can be configured as internal pump electricity
Pole and IPE is expressed as the equivalent circuit diagram of Figure 1A -1C.First electrode 116 and second electrode 118 are solid by least one
Body electrolyte 124 (being equally not shown here) connection, at least one described solid electrolyte zirconium oxide for example stable by yttrium
(YSZ) and/or the zirconium oxide (ScSZ) of scandium doping forms.Configuration about solid electrolyte 124 is 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
It is completely or partially integrated in other component at into sensor element 112, or alternatively, such as is integrated into plug assembly
And/or in engine control system.Control device 128 is connected by least one first signal line 130 with first electrode 116
It connects.Control device 128 is connect by least one second signal route 132 with second electrode 118.First signal line 130 is logical
At least one first anti-tampering capacitor c1 (indicating with appended drawing reference 134) is crossed to connect with ground connection 136.Second signal route 132 is logical
At least one second anti-tampering capacitor c2 (indicating with appended drawing reference 138) is crossed to connect with ground connection 136.In the first signal line 130
At least one measurement resistance 140 is also arranged between at least one of second signal route 132 and ground connection 136.First signal
Route 130 and/or second signal route 132 can be connect by measurement resistance 140 with ground connection 136.Preferably can include
It measures in the connection between the first signal line 130 and/or second signal route 132 and ground connection 136 of resistance 140 and is equipped with extremely
A few switch 142.Measure resistance 140 and anti-tampering capacitor c1 134 and/or measurement resistance 140 and anti-tampering capacitor c2 138
It can be connected in parallel.
Control device 128 can be set for function electric current, especially pulsed rectangular current operation pump unit 126.?
In the method, the first anti-tampering capacitor c1,134 Hes are determined by applying multiple and different switch states to pump unit 128
Second anti-tampering capacitor c2,138.
First switch state 144 is shown in figure 1A.It according to the method for the present invention may include the first measuring process,
In, apply first switch state 144 to pump unit 126.First switch state 144 can be no current state, it is particularly possible to give
Pump unit 126 applies first switch state 144 during the pulse interval of function electric current.It can especially be applied to first electrode 116
Add current source 145.It can detecte pump voltage U in the first measuring processp0And determine the first voltage on measurement resistance 140
Ug0.Arrow 146 indicates pump voltage Up0Direction.It can detecte pump voltage U in the end of the pump interval of function electric currentp0.First
The voltage Uc between first electrode 116 and ground connection 136 can also be determined in measuring processa0With second electrode 118 and ground connection 136
Between voltage Uci0.Reference can be applied to sensor element 112, especially second electrode 118 in first switch state 144
Voltage.Sensor device 110 especially can have reference voltage source 148, and the reference voltage source setting is for giving sensor member
Part 112 applies reference voltage.In a preferred embodiment, reference voltage can be such as 3.3V.In second signal route
Switch 150 can be arranged between 132 and reference voltage source 148, wherein the reference voltage source 148 in the closed state of switch 150
It is connect with sensor element 112.Arrow 152 illustrates to pump sense of current.
Figure 1B shows second switch state 154.It according to the method for the present invention may 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 again to the first anti-tampering capacitor c1 134 and the second anti-tampering capacitor c2 138
Charging.In addition, the first signal line 130 can be connect with measurement resistance 140, wherein switch 142 can be in the first signal line
It is closed between measurement resistance 140.In the second measuring process, it can determine between first electrode 116 and measurement resistance 140
Voltage Uca2And the voltage Uc between second electrode 118 and measurement resistance 140i2.Voltage Uca2With voltage Uci2It can be in transient state
It is determined after process.Furthermore the 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 illustrated in Fig. 2.It shows and is measuring in the left column of Fig. 2
The possible time-varying process of ohmically voltage.The voltage signal may include at least two signal components.Voltage letter
Number composition shown in the middle column of Fig. 2.First signal component 156 can be voltage Ug0The letter for following function electric current
The voltage signal of number --- being for example herein rectangular function ---, the voltage signal is shown as solid in the middle column of Fig. 2
Line.Second signal component 158 can be toning, be caused by anti-tampering recharging for capacitor 134,138.Second signal component
158 are shown as fine line in the middle column of Fig. 2.Voltage UguaIntegral of the voltage signal on the pulse duration can be passed through
To determine.Voltage UguaIt can especially be determined by the integral of voltage signal over the integration period, the time of integration is for example etc.
In the minimum pulse duration of current impulse.The pulse duration of current impulse can be, for example, 90 μ s to 391 μ s.However
Other pulse durations are also possible in principle.Such as the time of integration can be 71.04 μ s.Sensor device 110 can be with
With Sigma-Delta- converter.Sigma-Delta- converter can be set in the period, especially in integral
Between on voltage signal is integrated.Preferably, integral can be realized with starting with applying connection edge.By the electricity so determined
Press UguaThe voltage signal in the case where no toning, especially the first signal component can be subtracted.Voltage Ug0With UguaPoor 160
Thick dashed line is shown as in the left column of Fig. 2 and can be with the quantity of electric charge Q of recharge currentguaIt is proportional.
Third switch state 162 is shown in Figure 1C.It according to the method for the present invention may include third measuring process,
In, apply third switch state 162 to pump unit 126.Function can be applied to pump unit 126 in third switch state 162
The current impulse of electric current, especially positive pulse and anti-tampering capacitor 134,138 is recharged.It can be true in third measuring process
Determine first electrode 116 and measures the voltage Uc between resistance 140a1And the voltage between second electrode 118 and measurement resistance 140
Uci1.Voltage Uca1With voltage Uci1It can be determined after transient process.Furthermore it can detecte the electricity on measurement resistance 140
Press 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 QguaDescribed in Fig. 2 determine to realize.
Switching between different switch 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 third switch state 154
Between and realize between third switch state 162 and first switch state 144.In addition, the method may include first
Determine step, wherein determine voltage Uci0With voltage Uci2Poor dUci2With voltage Uca0With voltage Uca2Poor dUca2.The side
Method may include the second determining step, wherein determine voltage Uci1With voltage Uci0Poor dUci1With voltage Uca0With voltage Uca1
Poor dUca1.In addition, the method may include thirds to determine step, wherein determine anti-tampering capacitor c1And c2.It is true in third
Determine to determine anti-tampering capacitor c by solving system of linear equations in step1134 and c2 138。
Fig. 3 A shows the time-varying process of pump electric current, and sensor element 112 can be applied the pump electric current.Sensor
Element 112 can be run in pulsed operation, wherein apply pulse-type current to pump unit 126 in the described embodiment.Cause
This, in figure 3 a in time-varying process visible function electric current --- in this rectangular current --- positive and negative current impulse.
The change procedure of voltage difference delta U between first electrode 116 and second electrode 118 is shown in fig. 3 c.Not only in figure 3 a
Pump electric current and also voltage difference in fig. 3 c show toning caused by the recharge current by anti-tampering capacitor 134,138,
And the deviation of rectangular function.
Fig. 3 C shows voltage U determining in the method according to the inventionxTime-varying process.Curve 164 is shown
The change procedure of the voltage to land 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 to sensor element 112 in moment t0
144.Voltage Uc between second electrode 118 and ground connection 136i0It is indicated with appended drawing reference 170, in first electrode 116 and ground connection
Voltage Uc between 136a0It is indicated with appended drawing reference 172.Second switch state can be applied to sensor element 112 in moment t1
154.Voltage Uc between first electrode 116 and measurement resistance 140a2Indicated with appended drawing reference 174, second electrode 118 with
Measure the voltage Uc between resistance 140i2It is indicated with appended drawing reference 176.It can repeatedly be applied to sensor element 112 in moment t2
Add first switch state 144.Furthermore, it is possible to apply third switch state 162 to sensor element 112 in moment t3.First
Voltage Uc between electrode 116 and measurement resistance 140a1It is indicated with appended drawing reference 178, in second electrode 118 and measurement resistance 140
Between voltage Uci1It is indicated with appended drawing reference 180.
In another operation of sensor device 110, especially have to 126 pulsed of pump unit apply electric current and/or
Electric current pulsed operation in, it may be considered that anti-tampering capacitor 134,138 and correct particularly by caused by recharge current
Toning.Furthermore, it is possible to consider anti-tampering capacitor 134,138 in the determination of the indicatrix of sensor device 110.
Claims (15)
1. method of the one kind for running sensor device (110), wherein the sensor device (110) has for detecting
At least one sensor element (112) of at least one share of the gas componant in gas in measurement gas space (114),
Wherein, the sensor element (112) includes at least one first electrode (116) and at least one second electrode (118),
In, the second electrode (118) is arranged at least one measurement cavity (120), wherein the measurement cavity (120) passes through
At least one diffusion barrier (122) can apply the gas from the measurement gas space (114), wherein the first electrode
(116) it connects and is formed pump unit (126) by least one solid electrolyte (124) with the second electrode (118),
In, the sensor device (110) also has at least one control device (128), wherein the control device (128) passes through
At least one first signal line (130) is connect with the first electrode (116), wherein the control device (128) is by extremely
A few second signal route (132) connect with the second electrode (118), wherein first signal line (130) passes through
At least one first anti-tampering capacitor c1 (134) connect with ground connection (136), wherein the second signal route (132) is by extremely
A few second anti-tampering capacitor c2 (138) connect with the ground connection (136), wherein in the ground connection (136) and described first
At least one measurement resistance is arranged between at least one of signal line (130) and the second signal route (132)
(140), wherein control device (128) setting is for running the pump unit (126) with function electric current, wherein described
The described first anti-tampering capacitor c1 is determined by applying multiple and different switch states to the pump unit (126) in method
(134) and the second anti-tampering capacitor c2 (138).
2. according to the method described in claim 1, wherein, consider in another operation of the sensor device (110) described in
Anti-tampering capacitor.
3. according to the method described in claim 2, wherein, being passed through in another operation lieutenant colonel of the sensor device (110)
Toning caused by the anti-tampering capacitor (134,138).
4. according to the method in any one of claims 1 to 3, wherein the indicatrix in the sensor device (110)
Determination in consider the anti-tampering capacitor (134,138).
5. according to the method in any one of claims 1 to 3, wherein the described method comprises the following steps:
Iii) the first measuring process, wherein apply first switch shape to the pump unit (126) in first measuring process
State (144), wherein pump voltage U is detected in first measuring processp0And determine the on measurement resistance (140)
One voltage Ug0, wherein it is also being determined in first measuring process between the first electrode (116) and the ground connection (136)
Voltage Uca0And the voltage Uc between the second electrode (118) and the ground connection (136)i0；
Iv) the second measuring process, wherein apply second switch shape to the pump unit (126) in second measuring process
State (154), wherein determined between the first electrode (116) and the measurement resistance (140) in second measuring process
Voltage Uca2And the voltage Uc between the second electrode (118) and measurement resistance (140)i2, wherein furthermore in institute
State second voltage U of the detection on measurement resistance (140) in second switch state (154)guaAnd it can be determined by toning
The charge volume Q of recharge currentgua；And
V) third measuring process, wherein apply third switch state to the pump unit (126) in the third measuring process
(162), wherein determined between the first electrode (116) and the measurement resistance (140) in the third measuring process
Voltage Uca1And the voltage Uc between the second electrode (118) and measurement resistance (140)i1, wherein it is able to detect
Voltage U on measurement resistance (140)guiAnd the charge volume Q of recharge current is determined by toninggui。
6. according to the method described in claim 5, wherein, giving the pump unit (126) in the second switch state (154)
Apply the current impulse of function electric current, wherein recharge to the anti-tampering capacitor (134,138).
7. according to the method described in claim 5, wherein, giving the pump unit (126) in the third switch state (162)
Apply the current impulse of the function electric current, wherein recharge to the anti-tampering capacitor (134,138).
8. according to the method described in claim 5, wherein, the method also has follow steps:
Iv) first step is determined, wherein determine voltage Uci0With voltage Uci2Between poor dUci2With in voltage Uca0With voltage
Uca2Between poor dUca2；
V) second step is determined, wherein determine voltage Uci0With voltage Uci1Between poor dUci1With in voltage Uca0With voltage Uca1
Between poor dUca1；
Vi) third determines step, wherein determines the anti-tampering capacitor c1(134) and c2(138)。
9. according to the method described in claim 8, wherein, determining in step in the third by solving system of linear equations come really
The fixed anti-tampering capacitor c1(134) and c2(138)。
10. according to the method in any one of claims 1 to 3, wherein the sensor device (110) has Sigma-
Delta- converter, wherein the method has gamma correction.
11. according to the method described in claim 2, wherein, another operation of the sensor device (110) includes having pulse
Formula applies electric current and/or voltage and runs to the pulsed of the pump unit (126).
12. according to the method described in claim 6, wherein, the current impulse of the function electric current is negative pulse.
13. according to the method described in claim 7, wherein, the current impulse of the function electric current is positive pulse.
14. a kind of electronic storage medium, is stored with computer program on it, the computer program is arranged for implementing basis
Each step of method described in any one of claims 1 to 13.
15. a kind of control electronics comprising electronic storage medium according to claim 14.
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| DE102014211321.0A DE102014211321A1 (en) | 2014-06-13 | 2014-06-13 | Method for operating a sensor device |
| PCT/EP2015/062007 WO2015189055A1 (en) | 2014-06-13 | 2015-05-29 | Method for operating a sensor apparatus |
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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 WO PCT/EP2015/062007 patent/WO2015189055A1/en active Application Filing
- 2015-05-29 CN CN201580031474.5A patent/CN106461599B/en active Active
- 2015-05-29 KR KR1020167034784A patent/KR102383817B1/en active IP Right Grant
- 2015-05-29 EP EP15729362.2A patent/EP3155411A1/en not_active Ceased
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170018328A (en) | 2017-02-17 |
| CN106461599A (en) | 2017-02-22 |
| WO2015189055A1 (en) | 2015-12-17 |
| KR102383817B1 (en) | 2022-04-08 |
| EP3155411A1 (en) | 2017-04-19 |
| DE102014211321A1 (en) | 2015-12-17 |
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