CN103492873A - Sensor apparatus for detecting a parameter of a flowing fluid medium - Google Patents
Sensor apparatus for detecting a parameter of a flowing fluid medium Download PDFInfo
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- CN103492873A CN103492873A CN201280020282.0A CN201280020282A CN103492873A CN 103492873 A CN103492873 A CN 103492873A CN 201280020282 A CN201280020282 A CN 201280020282A CN 103492873 A CN103492873 A CN 103492873A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
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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
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
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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
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4077—Means for protecting the electrolyte or the electrodes
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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
- G01N27/414—Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS
- G01N27/4141—Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS specially adapted for gases
Abstract
The invention proposes a sensor apparatus (110) for detecting at least one parameter of a fluid medium flowing through a flow pipe (112), comprising at least one housing (114) and at least one sensor element (134), which is accommodated in the housing (114), for detecting the parameter, and a flow pipe. The housing (114) has at least one external housing (120) and at least one internal housing (122) which is at least partially surrounded by the external housing (120), wherein at least one gap, in particular at least one annular gap (124), is formed between the external housing (120) and the internal housing. The housing (114) is formed in such a way that at least a partial flow of the fluid medium can flow into the gap through at least one inlet opening (126) in order to arrive at the sensor element (134) and in order to then flow back into the flow pipe (112) through the internal housing (122) via at least one outlet opening (130). The housing (114) also has at least one retaining element (138). The housing (114) can be connected to the flow pipe (112) by means of the retaining element (138), wherein a portion of the housing (114) projects into the flow pipe (112). The inlet opening (126) is arranged at a distance from an internal wall (144) of the flow pipe (112). The sensor element (134) is arranged outside the flow pipe (112).
Description
Background technology
Known multiple for surveying the sensor device of one or more parameters of mobile fluid media (medium) from prior art.Described mobile fluid media (medium) can be for example gas or liquid.The present invention especially is described with reference to the waste gas of internal combustion engine below, for example, in the exhaust system of automobile.Yet other purposes is also possible in principle.At least one parameter to be detected can be for example physical parameter and/or chemical parameters.For example, it can be flow parameter, for example the flow velocity of fluid media (medium), mass rate or volumetric flow rate.Yet, particularly preferably being, at least one parameter to be detected comprises or at least one component, i.e. for example number percent and/or dividing potential drop, at least one component of fluid media (medium), as gas composition.For example, can detection quality and/or described at least one component of quantity can be oxygen and/or nitrogen and/or nitrogen oxide and/or at least one hydrocarbon.In general, at least one parameter of detection is for example the component of at least one gas composition.
The sensor device of the one-component of at least one gas composition in detectable gas (especially waste gas), be called λ-sensor, thereby general sensor element is used at least one solid electrolyte material, preferably at least one solid ceramic electrolyte is basis, and as Robert Bosch Gmbh(Robert Bosch incorporated company): the sensor in automobile, 1, waste gas 2010, the 160-165 pages are described.Yet the present invention also can be used for the parameter to be detected of a plurality of other kinds and/or the sensor device of other kind.At DE102006060312A1, sensor device has also been described in DE102007040726A1 and DE102008041038A1, they use after can being modified in principle under framework of the present invention.Further, so-called chemical field-effect transistor also can be used as sensor element and is applied in sensor device.For example, this chemical field-effect transistor used in automotive engineering is at H.Wingbrant:Studies of MISiC-FET Sensors for Car Exhaust Gas Monitoring,
studies in Science and Technology, Dissertation No.931, Seiten51bis57,
2005, oder in H.Wingbrant et al:Using a MISiC-FET Sensor for Detecting NH3in SCR Systems, IEEE Sensors Journal, Vol.5, No.5.October2005, Seiten1099bis1105(H.Wingbrant: for the research of the MISiC-FET sensor of car waste gas monitoring
science and technology research, disquisition No.931, the 51-57 page,
2005, or H.Wingbrant etc.: the application for the MISiC-FET sensor of surveying NH3 in the SCR system, IEEE sensor periodical, the 5th volume, the 5th phase, in October, 2005,1099-1105 page) described.
At many real sensor devices, the Abgassensor for example used in Abgassensor for example can electrical heating and for example can be formed with pottery.These sensor devices for example can shield at least in part by the one or more protection metal pipes that directly contact with waste gas streams, as described in the prior art.The main task of described protection tube is that the restriction waste gas streams flows through described sensor element; Stop the close sensor element of condensate water in waste gas system, especially prevent that water slug is to thermal Ceramics, this may cause described sensor element to break; Guarantee that enough large probe dynamic property (near the gas described sensor element exchanges fast) and the described sensor element of protection meet mechanical load, for example when mounted.Yet, to this requirement of protection tube, be that part is reversible.Thereby high dynamic property is usually only by enough large flowing velocity realization, yet water is transported to sensor element to be very possible and to have improved cooling effect by cold waste gas simultaneously.The part sensor element of longitudinal design usually generally is arranged in described off-gas line internal chamber in real sensor.Thereby, wish a kind ofly can guarantee that enough large dynamic property has high durability simultaneously and prevents the sensor device of water slug effect.
Summary of the invention
Therefore, in order to overcome the technological challenge of known sensor arrangement, the present invention proposes a kind of sensor device at least one parameter of surveying the fluid media (medium) flowing through flow duct.About fluid media (medium) may arrange the detecting parameter with at least one quality that can survey and/or quantity, can be with reference to top description.Described fluid media (medium) can especially flow through described flow duct along main flow direction.Main flow direction is interpreted as the principal direction of fluid media (medium) mass transport in flow duct here.Part is departed from this main flow direction and here may perhaps be left in the basket, for example, and local eddy currents etc.It can be also reversible that described main flow direction is in operation in principle.Mobile fluid media (medium) can especially comprise the waste gas of gas medium, especially internal combustion engine.
Described sensor device comprises that at least one housing and at least one are contained in the sensor element in described housing at least in part, and described sensor element is for surveying at least one parameter.Housing is generally understood as such element here; it has at least one internal chamber; in this case, for holding at least one internal chamber of described at least one sensor element, and be preferably assurance at least to the protective effect of mechanical load.For example, described housing is made by rigid material at least in part, for example, in described housing is fixed on to the flow duct of described fluid media (medium), under common power effect, for example at common bolt, connects under the power effect and does not cause distortion.Described housing can for example be made by a kind of metal material and/or plastic material completely or partially.
In situation of the present invention, sensor element is interpreted as such a element, and it is arranged to for surveying the parameter of at least one quality and/or quantity, and forms a corresponding signal.For example, described at least one sensor element can comprise at least one sensor chip.As elaborated below, described sensor element can especially comprise at least one ChemFET, for example known according to prior art recited above.Described sensor element generally can comprise for example at least one sensor surface, and wherein said sensor element can be contained in described housing, to such an extent as to described sensor surface available stream body medium loads.Described sensor element can be especially a micro parts on very little structure space, for example has the structure space that is less than 2 cubic centimetres, especially is less than 1 cubic centimetre and particularly preferably, is less than 0.5 cubic centimetre.Especially, described micro parts can be the micro parts of cube shaped.
Described housing have at least one external shell and at least one by external shell at least in part around inner shell.At least one gap is set between described external shell and inner shell, especially at least one annular gap.If not restriction, other possible configuration back is especially with reference to the configuration as at least one annular gap.Described casing structure becomes at least one shunting of described fluid media (medium) can be flow in described gap by least one entrance, described flow duct flow in described gap and thereby flow in described housing, to arrive described sensor element.Described housing further is configured to described shunting can then flow through described inner shell, by least one outlet, flow back in described flow duct.
Described housing also has at least one holding element.Described housing utilizes described holding element and can be connected with described flow duct, and wherein a part of housing extend in described flow duct.Described entrance arranges at interval with the inwall with described flow duct, and wherein said sensor element is arranged in described flow duct outside.
Described housing thereby utilize described holding element and can be connected with described flow duct.For this purpose, described flow duct for example can have at least one opening, and wherein, described housing extend in described flow duct by this opening in whole or in part.Described housing can utilize described holding element to be fixed in described flow duct, its mode be for example described housing utilize holding element can be with respect to described flow duct in position or orientation, wherein can fix with one dimension, two dimension or three dimensional constitution.Holding element is generally understood as and can makes the element connected between described housing and flow duct.This connection can be for example force closure and/or shape is sealed and/or the sealed connection of material.For example, described holding element can comprise at least one screw thread.For example, at least one holding element of described housing can cooperate with at least one element of described flow duct, for example utilizes reverse thread.Therefore, for example described housing not only, and described flow duct can have respectively at least one screw thread, thereby described housing preferably can be fixed in described flow duct.Alternatively or additionally, described holding element for example comprises a simple surface of contact, described housing utilizes described surface of contact to cling on described flow duct.For example, described housing can comprise shoulder, for example is arranged on the ring edge on described housing, and when described housing inserts or puts in described flow duct, it abuts in the degree of depth of inserting or putting into restriction on described flow duct.Usually, described holding element can be configured to make described housing to be positioned at least one dimension with respect to described flow duct, for example, on the direction perpendicular to described main flow direction and/or perpendicular to the tubular axis line of described flow duct.Therefore, as mentioned above, described housing for example can be with respect to described flow duct location, so that described housing extend in described flow duct with the identical degree of depth all the time.Therefore described holding element cooperates with at least one flow duct side holding element.
As mentioned above, described housing have at least one external shell and at least one by external shell at least in part around inner shell.For example, described external shell and/or inner shell are configured to tubular at least partly, thereby then, under hard-core condition, other possible configuration can be also exterior tube when the reference external shell, at the reference inner shell, can be also inner tube.Described external shell can be for example circlewise around described inner shell.Described gap, especially annular gap are set between described external shell and inner shell, and described gap is preferably around whole inner shell or only partly around described inner shell extension, at least 80% of preferred described inner shell.Described annular gap can be for example at least in part around described inner shell.
Described casing structure becomes described fluid media (medium) is flowed in described gap, in order to arrive described sensor element and then flow through described inner shell, flow back in described flow duct.For example, described inner shell can have at least one internal chamber, for example is designed to approximate conical internal chamber, and described fluid media (medium) flow back in described flow duct by described internal chamber.For example, described fluid media (medium) can flow in described annular gap in the axial direction to arrive described sensor element, and and flow through described internal chamber on the contrary direction of axial direction, flow back in described flow duct.Axial direction is generally understood as the direction of the axle that is parallel to described sensor device here.For example, described sensor device can be configured near cylindrical, so that described axle can be the part of turning axle and/or the described housing of for example described housing.For example, described housing can be fixed in described flow duct, especially utilizes described holding element, so that described axle is configured to, is substantially perpendicular to described main flow direction, and wherein, described main flow direction for example can be parallel to the turning axle orientation of described flow duct.In situation of the present invention, perpendicular or substantially parallelly be generally understood as offset from perpendicular or parallel direction is not more than 30 °, preferably be not more than 15 ° and be not more than especially 5 ° and particularly preferably, 0 °.
Described flow duct can have for example diameter of 30 millimeters to 150 millimeters, for example, from the diameter of 50 millimeters to 100 millimeters and the flow duct xsect of 70 millimeters particularly preferably.Therefore, according to the discharge capacity of engine, the xsect of waste gas system can be designed to difference.Common pipe diameter is 30 millimeters to 100 millimeters when PKW.In the NKW scope, described diameter is generally 100 millimeters to 150 millimeters.Yet other diameter is also possible.Described fluid media (medium), especially waste gas, can or even flow through described flow duct with the flow velocity higher than 300 meter per seconds with for example mean flow rate 1 to 300 meter per second, flow rate that for example can 2 to 7 meter per seconds.Described flow velocity for example can depend on again the xsect of described waste gas system and/or the operating mode of engine.
For fear of the problems referred to above, especially propose described housing design and become the inwall of described entrance and described flow duct to arrange at interval in situation of the present invention.Described holding element especially is arranged to make at least 3 millimeters, described entrance and described inwall interval, at least 5 millimeters especially.For example, 3 millimeters to 20 millimeters, described entrance and inwall interval, particularly 5 millimeters to 15 millimeters and particularly preferably 10 millimeters.Described holding element also can be arranged to described outlet and compare with described entrance with described inwall interval and obtain far.Especially, described outlet and inwall separate at least 5 millimeters, preferably at least 10 millimeters.Especially, 8 millimeters to 30 millimeters, described outlet and inwall interval, be for example 10 millimeters to 20 millimeters and particularly preferably 15 millimeters.
Described holding element thereby can for example be arranged to limit the part that is positioned at flow duct inside of described sensor device and the part that is positioned at the flow duct outside of described sensor device.Described sensor element is arranged in exterior section, is particularly useful for cooling described sensor element.Described sensor element can be especially at least 20 millimeters with respect to the distance of the inwall of described flow duct, preferably at least 30 millimeters and particularly preferably at least 40 millimeters.Described sensor device and particularly described housing can especially comprise that at least one is arranged in the heating radiator of described flow duct outside, especially a heating radiator with at least one heat radiator.For example, also at least one heat radiator can be set, simultaneously as radiation protection board.
Described sensor device also can comprise at least one heating element.For example, described at least one heating element comprises at least one heater element.Further, described sensor device has for example at least one temperature controller and/or at least one temperature regulator.Described at least one heating element and preferred described at least one temperature controller or temperature regulator especially can be arranged, in order to adjust the temperature of especially controlling or regulating described sensor element.
Described sensor device also can comprise at least one filtering element, but wherein setting example, as at least one filtering element, is selected from following group: chemical filter, catalyst converter, flow technique measure, for example drop separator and/or particle separator.
Another aspect of the present invention proposes a kind of sensing system, described sensing system has sensor device and at least one flow duct of a described configuration in above basis or back, wherein, described sensor device utilizes described holding element and is connected with described flow duct.For example, as mentioned above, described sensing system extend into described flow duct inside by least one opening in described flow duct.For the another possible configuration of described sensing system, can be with reference to the sensor device.
In front or the sensor device and the sensing system that in the one or more configurations of at length setting forth of back, propose there is series of advantages with respect to known sensor device and sensing system.Therefore, this sensor device that has especially new sensor element can be used as Abgassensor, and wherein, described sensor element for example is configured on very little structure space with cubical shape as micro parts.This sensor element is for example described at DE102007040726A1.Utilize the sensor device proposed to meet well typical main structure for conveying covering this sensor element.This main structure for conveying especially consists of the working temperature that the makes described sensor element temperature lower than real sensor, preferably below the highest exhaust gas temperature.For example, the exemplary operation temperature of described sensor element is 300 ℃, and typical exhaust gas temperature according to installation site for example at 700 ℃ to 1000 ℃ of moments or even continue to reach 1000 ℃.Be in operation, described sensor element is sustainable uses electrical heating, for example utilize heating element, and described temperature can be adjusted here.Described exhaust gas temperature for example can be positioned at below the maximum operating temperature of described sensor element when each operating mode of engine.Generally must reach minimum temperature in the situation of former sensor element.In many cases, higher gas temperature is not serious for sensor element, on the meaning required in the lower efficiency of heating surface, wishes.Further, utilize the sensor device proposed also to meet the requirement of general sensor device to dynamic property.Therefore, utilize described sensor device to realize described fluid media (medium), especially gas is not transported to sensor element with at least approximately not slowing down.Yet the sensor device proposed is about preventing water droplet and particle collision and being particularly advantageous about the requirement that prevents from for example polluting by cigarette ash.
Be arranged in described flow duct space outerpace and the suitable geometric configuration of optional described housing can guarantee that described sensor element is supplied to the fluid media (medium) of q.s by described sensor element.Further, described fluid media (medium) also can be cooled for example by above-mentioned at least one heating radiator at it to the path of sensor element, for example, by heat radiator (heating radiator or heat radiator are arranged on described hull outside in the described flow duct outside), with can cooling described entrance and sensor element between flow path.Yet the configuration that does not have heat radiator is also possible in principle.
Utilize the sensor device propose also to meet many requirements simultaneously, there is further the structural principle according to the known housing geometric configuration of Abgassensor.Realize thus cost savings and can use existing infrastructure.In order to realize the present invention, for example only need compare little mechanical modification to known housing geometric configuration.The present invention can also be from the main flow of described flow duct the withdrawn fluid medium, for example shunting of waste gas, and preferably carry out cooling on the path of the installation site that arrives sensor element.Therefore, described fluid media (medium), for example waste gas preferably has the temperature lower than the actual work temperature of sensor in each operating mode when reaching sensor.Further, the fluid media (medium) extracted, for example waste gas, with the installation site feeding of large speed sensor element in described housing, can guarantee to measure enough dynamic properties of concentration change with acquisition.Another advantage is to utilize according to sensor device of the present invention, can realize to a great extent described gas extraction do not rely on sensor with respect to the function of rotation angle.Especially, described entrance can be designed so that described entrance all and/or partly circlewise around described inner shell and/or outlet.Described sensor device can be configured to make the function of described sensor device not rely at least as far as possible the axle rotation of described sensor device around described sensor device.
Further, before actual measurement, also can the fluid media (medium) extracted be filtered and/or pre-service.For this purpose, as mentioned above, but setting example is as one or more filtering elements.This at least one filtering element for example can be arranged in the gap between described entrance and sensor element.For example, can carry out chemical filtering and/or catalysis here.Alternatively or addedly, the impurity of water droplet and/or particulate occurs on sensor element before, can adopt for water droplet and separate and/or the flow technique measure of separation of particles.
As mentioned above, described sensor device can comprise a housing with protection tube (being exterior tube and inner tube), and wherein, the geometric configuration of described housing can be embodied as in view of above-mentioned requirements, can optimize becoming a mandarin of sensor element, for example semiconductor transducer.For example, described sensor element can comprise at least one semiconductor transducer, for measuring the concentration of one or more gas with various of engine exhaust gas.
Above-mentioned holding element can for example comprise at least one shoulder, and it is set to abut on flow duct.Described sensor device can comprise a movement-oriented device, the shunting branched out on geometric shape from described flow duct, for example off-gas line is guided out, and for example in the position of the interval of the outer wall with described off-gas line maximum, turn to, to be guided through described sensor element and then to flow back in described flow duct.
From for example, extract the mode of operation of shunting by (from main waste gas streams) the main flow of flow duct, the known principle that can especially survey according to existing λ realizes.The protection tube of described probing shell can comprise the entrance and exit for waste gas.Can be for example by the fluid stopping zone near at least one entrance, for example form is the protection tube part perpendicular to main gas flow orientation, causing makes to flow along with the increase of static pressure in flowing slows down.Simultaneously, dwindle the xsect of free xsect, the especially off-gas line of described flow duct by described sensor device is installed, realize acceleration mobile in exit region and thereby the middle static pressure decline of flowing.Pressure differential between described fluid stopping zone and the narrowest xsect can form the expulsive force of a described sensor device of percolation.
The accompanying drawing explanation
Obtain further details of the present invention and feature from the following explanation of the preferred embodiment schematically illustrating shown in Fig. 1 and 2.Shown in the drawings:
Fig. 1 illustrates the embodiment according to sensor device of the present invention; With
Fig. 2 be illustrated under installment state according to Fig. 1 according to sensor device of the present invention and flow duct.
Embodiment
In Fig. 1, with sectional view, illustrate according to sensor device 110 of the present invention, at least one parameter of the fluid media (medium) of detection flows via flow pipe (meaning with Reference numeral 112).Fig. 2 illustrates sensor device 110 in being arranged on flow duct 112, hereinafter also referred to as the state in off-gas line with skeleton view.Then together with reference to these two accompanying drawings.Sensor device 110 and flow duct 112 form the total member of sensing system 111.
The shunting that the main flow from flow duct 112 of described fluid media (medium) or fluid media (medium) branches out can flow into annular gap 124 at entrance 126, in Fig. 1, with arrow, mean, percolation on the axial direction of sensor device 110, turning to and arriving sensor element 134 bottom.About the possible configuration of this sensor element 134, but reference example is as top explanation.Described shunting is can be for example for example cooling by one or more heating radiators that be not shown specifically in Fig. 1, on the outside of flow duct 112 outsides on 134 the path from entrance 126 to sensor element.Described shunting can for example overflow at least one measurement surface 136 of sensor element 134.Then, described shunting turns to again, and along the described internal chamber 122 of axial reverse percolation, and from housing 114, flow out again in outlet 130.The pressure differential flow through together between fluid stopping zone 128 and area of low pressure 132 that flows of described shunting drives.
The size of holding element 138 is chosen to be sensor element 134 and is arranged in flow duct 112 outsides, especially the outside of flow duct 112 interior zones.For example, the distance between the inwall 114 of flow duct 112 and entrance 126 is used d in Fig. 1
1mean, size is 3 millimeters to 20 millimeters, particularly 5 millimeters to 15 millimeters, is particularly preferably 10 millimeters.Between the outside 142 of entrance 126 and flow duct 112 apart from d
2ratio is apart from d
1greatly for example from 2 to 10 millimeters, particularly from 3 to 7 millimeters and particularly preferably 10 millimeters.According to the example of flow duct 112, apart from d2, also can differently design.For example, at this embodiment or also in another embodiment, flow duct 112 is simple off-gas line for example, typical wall thickness (d
2-d
1) be from 1 millimeter to 10 millimeters, particularly from 2 millimeters to 3 millimeters.Particularly in the waste gas system of double-walled, clearance isolation, also two or more plates can be set, for example the thickness of slab of each plate is from 1 to 5 millimeter, particularly 2 millimeters, and clearance is from for example 1 millimeter to 10 millimeters, particularly 2 millimeters to 5 millimeters.Inwall 144 and sensor element 134 for example measure between surface 136 can be for example at least 20 millimeters apart from d3, preferably at least 30 millimeters and particularly preferably at least 40 millimeters.For example, this distance is 20 to 60 millimeters.
The mode of operation of the shunting measure of shunting from main gas flow in the layout according to shown in Fig. 1 and 2 can for example be carried out according to known λ probe principle (as according to above-mentioned prior art).Therefore, as mentioned above, the formal construction in fluid stopping zone 128 be entrance 126 with the reverse side of main flow direction 188 on high-pressure area.Area of low pressure 132 is because the free xsect dwindled of flow duct 112 forms.For example, flow duct 112 has above-mentioned xsect, for example in Fig. 2 from 30 millimeters to 150 millimeters, especially from the interior diameter D of 50 millimeters to 100 millimeters.
Contrary with above-mentioned prior art, according to shown in Fig. 1 and 2 according in configuration of the present invention, the free xsect dwindled is preferably obviously larger, and because of so that obtain larger pressure differential between fluid stopping zone 128 and area of low pressure 132.This larger branch of guiding quality shunting, cause sensor device 110 response time and thereby the dynamic property that improves faster.In contrast to the prior art, by the sidewall in flow duct 112 interior zones that rises to of external shell 120, stop impurity, for example introducing of water, water is as flow duct 112(off-gas line for example) inwall 144 on the wall film can carry along inwall 144.Therefore, for water, to strike on sensor element 134 be firmer to the configuration of this geometric configuration.
About the maximum gas temperature of the installation site of sensor element 134 and about the optimization of the requirement of the starting behavior of dynamic property in practice in conjunction with the reverse behavior that is called temperature-dynamic property and shears.High dynamic property for example obtains by the shunting of large quality, supplies with live gas, for the Rapid Cleaning of the housing volume of housing 114.Yet, when high gas temperature, more high quality stream is used simultaneously in high convection current heat content and carries and be supplied in housing 114, and thereby cause high gas temperature on sensor element 134.For sensor element 134 is heated, setting example, as the heating element 146 of at least one heating element 146, especially at least one activation, only impliedly illustrates in Fig. 1.For example, heating element 146 can comprise at least one heater element and/or at least one cooling element.For example, electric resistance heater and/or resistance refrigeratory can be set.Further, but set temperature controller, especially a temperature regulator.In order to make gas reduce gas temperature on the path of its sensing station towards sensor element 138, preferably, can as far as possible contact cooling surface, in order to can make heat interchange between gas and housing 114 with strengthening.Realize the expansion of heat transfer surface and the reduction of case temperature by the distance enlarged from the installation site of sensor element 128 to inwall 144 and/or the outside 142.
Claims (11)
1. for the sensor device (110) of at least one parameter of the fluid media (medium) of detection flows via flow pipe (112), comprise at least one housing (114) and at least one sensor element (134), described sensor element (134) is contained in housing (114) and for surveying described parameter, wherein, described housing have at least one external shell (120) and at least one by described external shell (120) at least in part around inner shell (122), wherein, form at least one gap between described external shell (120) and inner shell (122), especially at least one annular gap (124), wherein, described housing (114) is configured to make at least one shunting of described fluid media (medium) to flow in described gap by least one entrance (126), in order to arrive described sensor element (134) and then flow back in described flow duct (112) by least one outlet (130) through described inner shell (122), wherein, described housing (114) also has at least one holding element (138), wherein said housing (114) utilizes described holding element (138) and can be connected with described flow duct (112), wherein a part of described housing (114) extend in described flow duct (112), wherein, described entrance (126) is arranged at interval with the inwall (144) of described flow duct (112), wherein, described sensor element (134) is arranged in described flow duct (112) outside.
2. according to the described sensor device of last claim (110), it is characterized in that, described holding element (138) is arranged to described entrance (126) and at least 3 millimeters, described inwall (144) interval, particularly at least 5 millimeters.
3. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described holding element (138) is arranged to described entrance (126) and 3 millimeters to 20 millimeters, described inwall (144) interval, particularly 5 millimeters to 15 millimeters, particularly preferably 10 millimeters.
4. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described holding element (138) is arranged to described outlet (130) and compares with described entrance (126) with described inwall (144) interval and obtain far.
5. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described holding element (138) is arranged to described outlet (130) and at least 5 millimeters, described inwall (144) interval, particularly at least 10 millimeters.
6. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described holding element (138) is arranged to described outlet (130) and 8 millimeters to 30 millimeters, described inwall (144) interval, particularly 10 millimeters to 20 millimeters, particularly preferably 15 millimeters.
7. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described sensor element (134) is at least 20 millimeters to the distance of inwall (144), preferably at least 30 millimeters, and particularly preferably at least 40 millimeters.
8. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described sensor device (110) has at least one and is arranged in the outside heating radiator of described flow duct (112), and described heating radiator has at least one heat radiator.
9. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described sensor device (110) comprises at least one heating element (146).
10. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described sensor device (110) comprises at least one filtering element.
11. sensing system, comprise that at least one is according to sensor device in any one of the preceding claims wherein (110) and at least one flow duct (112), wherein, described sensor device (110) utilizes described holding element (138) and is connected with described flow duct (112).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011017772.8 | 2011-04-29 | ||
| DE102011017772A DE102011017772A1 (en) | 2011-04-29 | 2011-04-29 | Sensor device for detecting a parameter of a flowing fluid medium |
| PCT/EP2012/053397 WO2012146417A1 (en) | 2011-04-29 | 2012-02-29 | Sensor apparatus for detecting a parameter of a flowing fluid medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103492873A true CN103492873A (en) | 2014-01-01 |
| CN103492873B CN103492873B (en) | 2015-11-25 |
Family
ID=45815517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280020282.0A Expired - Fee Related CN103492873B (en) | 2011-04-29 | 2012-02-29 | For detecting the sensor device of the parameter of the fluid media (medium) flowed |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20140022397A (en) |
| CN (1) | CN103492873B (en) |
| DE (1) | DE102011017772A1 (en) |
| WO (1) | WO2012146417A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977190A (en) * | 2014-03-04 | 2015-10-14 | 西门子公司 | Sensor device and method for analyzing mixed gas indoors |
| CN108535408A (en) * | 2017-03-03 | 2018-09-14 | 梅斯法国公司 | Urea sensor protects component and urea sensor system |
| CN108692774A (en) * | 2017-04-05 | 2018-10-23 | 罗伯特·博世有限公司 | Sensor element at least one characteristic for sensing fluid media (medium) |
| CN111183505A (en) * | 2017-08-08 | 2020-05-19 | 奥斯通医疗有限公司 | Fluid sensor system and method for analyzing fluids |
| CN111465825A (en) * | 2017-12-29 | 2020-07-28 | 菲利普莫里斯生产公司 | Sensor device |
| CN113340330A (en) * | 2020-03-02 | 2021-09-03 | 哈姆股份公司 | Work machine movable on ground |
| CN113607614A (en) * | 2021-06-04 | 2021-11-05 | 北京联合大学 | Gas composition detection integrated sensor |
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| DE102013015218A1 (en) * | 2013-09-13 | 2015-03-19 | Hella Kgaa Hueck & Co. | Gas sensor and motor vehicle with a gas sensor |
| DE202014005420U1 (en) | 2014-07-02 | 2014-08-01 | Siemens Aktiengesellschaft | Sensor device for analyzing a gas mixture in a process space |
| DE102016117765A1 (en) * | 2016-09-21 | 2017-01-19 | Universität Stuttgart | measurement device |
| DE102017207402A1 (en) * | 2017-05-03 | 2018-11-08 | Robert Bosch Gmbh | Optical soot particle sensor for motor vehicles |
| DE102018203301A1 (en) * | 2018-03-06 | 2019-09-12 | Robert Bosch Gmbh | Laser-induced incandescence-inducing particle sensor with a confocal arrangement of a laser spot and a thermal radiation spot |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102011017772A1 (en) | 2012-10-31 |
| CN103492873B (en) | 2015-11-25 |
| KR20140022397A (en) | 2014-02-24 |
| WO2012146417A1 (en) | 2012-11-01 |
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