CN102297704B - For detecting the device of the characteristic of the fluid media (medium) of flowing - Google Patents
For detecting the device of the characteristic of the fluid media (medium) of flowing Download PDFInfo
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- CN102297704B CN102297704B CN201110181448.4A CN201110181448A CN102297704B CN 102297704 B CN102297704 B CN 102297704B CN 201110181448 A CN201110181448 A CN 201110181448A CN 102297704 B CN102297704 B CN 102297704B
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- sucking
- flow
- medium
- flowing
- fluid media
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- 238000002604 ultrasonography Methods 0.000 claims description 13
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- 238000005259 measurement Methods 0.000 description 11
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Classifications
-
- 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
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention proposes the device (110) of the air quality at least one characteristic of a kind of fluid media (medium) for detecting flowing, especially internal combustion engine.Described device (110) includes that at least one is for the sensor device (126) detecting described characteristic.Described device (100) also includes that at least one can be by the surface (168) of fluid media (medium) overflow.Described device (100) also includes at least one aspiration device (180), at least one Flow regime layer (170,172) that described aspiration device (180) is arranged on surface (168) described in sucking-off at least in part.
Description
Technical field
The present invention relates to the device of the characteristic of a kind of fluid media (medium) for detecting flowing.
Background technology
By prior art, such as by the spy of the known fluid media (medium) being largely used to detection flowing of automotive engineering
The device of property.Fluid media (medium) can be gas and/or liquid in principle, such as at inlet manifold of IC engine
The air quality of middle flowing.But in principle other application of the present invention be also it is contemplated that.Should
Characteristic (wherein can also detect multiple characteristic) to be detected can be especially flow behavior, such as speed
Degree, quality stream or volume flow.Described and/or other the combination of characteristic can also be detected in principle.
Below substantially with reference to air-flow sensors, the air quality of the use being particularly based on ultrasonic signal
Meter describes the present invention, and described ultrasonic signal is transmitted by fluid media (medium) and passes through fluid media (medium)
Flowing be affected.Flow behavior can be derived by the impact of ultrasonic signal.This kind of device is also
It is referred to as ultrasonic flowmeter UFM (ultrasonic flow meter).Ultrasound wave air-flow sensors leads to
Often the propagation times based on two ultrasonic signals measure flowing velocity, and the two ultrasonic signal is permissible
Launched by one or more ultrasonic transducers and/or receive.Fluid media (medium) generally flows through measurement pipe at this
Fluxus formae pipe.Ultrasonic signal generally parallel with the flow direction of fluid media (medium) with at least one or
The antiparallel durection component of person transports through fluid media (medium).By by fluid media (medium), such as pass through signal
The impact of signal can be derived flowing velocity and/or air mass flow by dispersion and/or Doppler effect
And/or volume flow.Here, sensor signal can directly be transmitted between these ultrasonic transducers,
Or one or more reflecting surface for reflectance ultrasound ripple signal can also be used.The most also make at this
With so-called flowing grid, this flowing grid is arranged on the upstream of device or the part as device sets
Put in stream and the homogenization of flowing should be used for.
But the device of described type or the other type of fluid media (medium) for detecting flowing are at least
The device of one characteristic is the most problematic, i.e. Flow regime layer on the overflow surface of device may
It is counted as negative.Flow regime layer is typically the layer in region, surface, such as more internal with flow duct
, compare the layer that flowing velocity reduces away from the flow region on surface.These Flow regime layers can have
There are different flow regimes, such as laminar flow state, stratiform-disorder-transitive state and the stream of disorder
Dynamic state.The combination of these states can also exist.But the Flow regime layer in this device region can
To affect signal and the signal quality of device consumingly.It is possible especially between each flow regime and carries out
Transition, this transition is the most predictable, but this obviously may affect signal and signal significantly
Quality.
Summary of the invention
The present invention correspondingly proposes the dress of at least one characteristic of a kind of fluid media (medium) for detecting flowing
Put, the shortcoming that this device at least largely avoid known devices.Especially this device has bright
The aobvious signal quality improved and be obviously improved relative to different running statuses and thus relative to flowing
The vigorousness of fluid media (medium) flow regime in relevant surfaces.
This device can be device as described above in principle, it such as can be used in gaseous state and/or
Liquid medium, especially air, such as automobile air quality in.The particularly advantageous automobile of being used in
In motor intake manifold.At least one characteristic described can be one or more above-mentioned characteristic in principle,
(i.e. time per unit flows through for the most one or more flow behaviors, such as speed and/or volume flow
Volume) and/or quality stream (quality that i.e. time per unit transmits).But other application neck in principle
Territory is also feasible.
This device includes that at least one is for the sensor device detecting at least one characteristic described.At this
Can be the sensor device with one or more sensor in principle, described sensor be set use
In detection at least one characteristic described.Can also retouch with reference to the above of prior art with illustrating thus
State.Such as sensor device can include one, preferred two or more ultrasonic transducers and
It is configured to ultrasonic sensor, such as, is configured to ultrasound wave air-flow sensors.For described at least
One ultrasonic transducer additionally can arrange at least one alternatively and have at least one reflecting surface
Reflection unit, wherein, equally with reference to above description.But other sensor device in principle
Configuration is also feasible.
This device also includes at least one surface by fluid media (medium) overflow.Such as this can be flowing
The inwall of pipe, such as flow duct sequence, wherein, flow duct itself can be the composition of device alternatively
Part, such as, as flowing pipeline section, sensor device is integrated in this flowing securely or removably
In pipeline section.Alternatively or additionally, described at least one can the surface of overflow can also such as include
At least one reflecting surface optional stated, on this reflecting surface can reflectance ultrasound ripple signal, such as from
First ultrasonic transducer of sensor device to sensor device the second ultrasonic transducer or return
On the path of same ultrasonic transducer.Different configurations is attainable.Can the surface of overflow outstanding
The flow direction of its fluid media (medium) that can be substantially parallel to flowing is arranged, such as, be situated between relative to fluid
The flow direction of matter has the deviation less than 20 °.Flow direction is interpreted as that at this fluid media (medium) is at this
Main direction of transfer in the region of device, the such as main biography when device being conventionally used in flow duct being internal
Send direction.
Carry to solve the problems referred to above of the Flow regime layer in the region at least one surface described
Going out, this device also includes at least one aspiration device.This aspiration device is arranged at least in part
Sucking-off at least one Flow regime layer in the region at least one surface described.Sucking-off understands at this
For, aspiration device is arranged in the region at least one sucking-off position and/or sucking-off region producing
Negative pressure, to remove fluid media (medium) by negative pressure from Flow regime layer.
As it has been described above, sensor device can constitute and include one or many in principle in any way
Individual sensor.Especially this sensor device can include at least one ultrasonic transducer and at least one
Reflecting surface for reflectance ultrasound ripple signal.Aspiration device can especially be arranged at least in part
The Flow regime layer of at least one reflecting surface described in sucking-off.Alternatively or additionally, this device can also
At least one flow duct included as described above, such as flow pipeline section.This aspiration device can also be set
Flow regime at least one inwall of sucking-off flow duct the most at least in part
Layer.Such as this aspiration device can include at least one sucking-off gap.From the inwall sucking-off of flow duct
In the case of, sucking-off gap can such as be arranged on the inwall of flow duct and can such as include to
A few annular and/or at least one ring segment-shaped sucking-off gap of circle.Sucking-off gap can especially base
It is perpendicular to main flow direction on Ben arrange, such as, has not relative to the orientation vertical with main flow direction
Deviation more than 20 °.For sucking-off gap layout on inwall alternatively or additionally, it is also possible to
Optional reflecting surface arranges at least one sucking-off gap.Again at least one sucking-off gap is converted
Ground or additionally, in this configuration or in other configuration of assembly of the invention, other can also be set
The sucking-off portion of type, the sucking-off portion of such as point-like, such as by the multiple points at least one surface
The sucking-off fluidic junction of shape, or other kinds of sucking-off portion.
This device can at least one flow duct included as described above.This flow duct can such as be configured to
Flowing pipeline section and/or be desirably integrated in a bigger flow duct device.But in conversion or additional
Ground, this device can also at least partially constitute as intrusion detector and be arranged for being inserted into
In flow duct.This insertion can reversibly or also can be carried out regularly.Intrusion detector understands at this
Being a device, it can be encased in flow duct in this wise so that intrusion detector is at least part of
Ground, such as extend in the flow cross section of flow duct together with sensor device.It is being configured for insertion into
In the case of formula detector, aspiration device can especially at least be partly integrated in intrusion detector.
Therefore, intrusion detector can such as include sensor device and also include aspiration device or sucking-off
Device at least some of.Such as in intrusion detector can with integrated one, two or more
Ultrasonic transducer and optionally at least one reflecting surface, they can reversibly or be fixedly inserted into
In flow duct.Aspiration device can at least one sucking-off gap the most included as described above and/or at least
The grid of one sucking-off fluidic junction, especially point-like sucking-off fluidic junction.It is being configured for insertion into formula detector
In the case of, at least one sucking-off gap described and/or at least one sucking-off fluidic junction described can be such as
It is integrated in intrusion detector, integrated together with one or more sucking-off passages alternatively.
Aspiration device can especially at least be partially disposed at sensor device upstream and/or at sensor
In the region of device.If being such as provided with one, two or more sensor transducer, then sucking-off
Device, for example, at least one sucking-off fluidic junction, for example, at least one sucking-off gap and/or at least one suction
Go out opening and can be arranged on the upstream of the ultrasonic transducer being arranged in most upstream, such as, be arranged on flowing
In the inwall of pipe.Alternatively or additionally, at least one sucking-off fluidic junction can also be arranged on two surpass
Between acoustic wave transducer.Alternatively or additionally, at least one aspiration device described, for example, at least one
Individual sucking-off fluidic junction can be arranged on again in the region of reflecting surface, the most on the reflecting surface, preferably instead
Penetrate beginning, face, especially at least one, the region that ultrasonic signal reflects occurs during plant running
Upstream.Other configuration is essentially feasible.First element is arranged in the second element " upstream " at this
It is understood to a kind of layout, the fluid media (medium) wherein flowed first warp the most within the scope of this invention
Cross the first element and be then passed through the second element.Similarly, " downstream " is arranged and is understood to contrary
Arrange.
As it has been described above, aspiration device especially includes at least one sucking-off fluidic junction from the teeth outwards.Sucking-off
Fluidic junction is interpreted as an opening at this, and surface can be loaded negative pressure by it.Sucking-off fluidic junction is permissible
Especially include sucking-off gap and/or other type of opening.For example, it is possible to arrange at least one sucking-off seam
Gap, this sucking-off gap can be as mentioned above transverse to the flow direction, the most vertical of fluid media (medium)
Directly arrange in flow direction.For at least one sucking-off gap alternatively or additionally, it is also possible to such as
Point-like grid is set.Other configuration is also feasible.
Aspiration device itself can especially include that at least one sucking-off pump, described sucking-off pump itself can be
The ingredient of this device.Negative pressure needed for can producing for sucking-off by this way.In conversion or
Additionally, aspiration device can also include that at least one sucking-off is taken over, the most on the outside of the device,
Wherein, sucking-off adapter may be constructed for connecting the negative pressure device outside.In like fashion can be by
Negative pressure needed for the negative pressure device offer of sucking-off pump and/or at least one outside.
But alternatively or additionally it is particularly preferred that for the negative pressure needed for sucking-off at least in part,
Preferably entirely produce in the inside of device own, wherein, be preferably not provided with having motion, especially
Pump in the mechanical part meaning of driven component.Therefore, can be especially with many for sucking-off
Hydrostatic and/or hydrokinetic effect.Especially can use the principle of water jet pump, it make use of
Bernoulli effect.Make use of at this, flowing in a region is accelerated to cause this fluid media zone
In hydrostatic pressure decline.This acceleration region may serve as carrying out at least one surface
The negative pressure source of sucking-off.Correspondingly, proposing in a kind of preferred configuration of the present invention, aspiration device includes
One integrated negative pressure device.This integrated negative pressure device is arranged for inside fluid media (medium) producing pressure
Drop and for sucking-off.This pressure drop can produce particularly by the following manner: produces inside fluid media (medium)
Raw speed fall, wherein, the flowing ratio at least one region, surface (sucking-off to be carried out)
Flowing in another fluid media zone (carrying out this sucking-off towards it) is slower.Correspondingly special
The most preferably, aspiration device includes that at least one adds for accelerating at least one of of fluid media (medium)
Speed variator.Aspiration device can be arranged for the accelerating part making Flow regime layer towards fluid media (medium)
Reach.This can such as be accomplished by: accelerator is arranged for causing at least one
Flow constriction, wherein, fluid media (medium) accelerates in the region of flow constriction.Correspondingly, this dress
Put and such as can be arranged for being divided into the cross section of flow duct at least two region, i.e. at least one
Measured zone and at least one acceleration region, it on sucking-off to be carried out can the surface configuration of overflow in survey
Amount intra-zone, in this acceleration region, fluid media (medium) is accelerated by flow constriction, wherein, from survey
Amount region can be carried out towards the sucking-off of acceleration region.These regions can the most mutually be divided at this
Turn up the soil composition.These regions can be arranged on sustained height relative to the flowing of fluid media (medium) or also
Upstream and/or downstream can be arranged on mutually staggering.Different configurations is feasible.For the receipts that flow
Contracting, aspiration device especially includes that at least one contraction elements, described contraction elements are arranged for shrinking
Flow cross section, to provide the accelerating part of fluid media (medium).This contraction elements can especially include flowing
Domatic, the domatic little by little or the most in the flowing direction contraction flow cross section of this flowing.This contraction
Preferably taking place in a region of flow duct, this region is not used in measurement, i.e. outside measured zone,
Wherein, the region of contraction can the most spatially separate with measured zone.Flow domatic can be such as
It is arranged on the inwall of flow duct and/or can also be arranged on intrusion detector, such as, be arranged on slotting
Enter below the reflecting surface of formula detector.Different configurations is feasible.Shrink if provided, with at least one
Element, then it is particularly preferred that at least one sucking-off passage of aspiration device from sucking-off region, such as
At least one fluidic junction (such as sucking-off gap and/or sucking-off opening) on surface leads to flow cross section
In contraction flow region.The sucking-off towards the acceleration region of fluid media (medium) from this surface can be realized in like fashion.
The device proposed has many advantages relative to the known devices of known type.Accordingly, because
Flow regime layer is sucked out at least in part, and the especially signal quality of this device can be obviously improved.Should
Device is stably constituted also relative to the conversion of running status.Especially can avoid or at least reduce passing through
Unpredictable or uncertain conversion between different flow regimes in the region of Flow regime layer
The interference effect caused.
Accompanying drawing explanation
Embodiments of the invention are shown in the drawings and illustrate in detail below.It illustrates:
Figure 1A to 1C is according at least one of fluid media (medium) for detecting flowing of prior art
The device of characteristic；
Fig. 2 A to 2B is according to the modification of the device with flowing grid of Figure 1A to 1C；
Fig. 3 is according to the Flow regime layer in the device of Fig. 2 A and 2B；
Fig. 4 typical case's flowing boundary layer with simulated flow ratio in reflective face region
Longitudinal section；
Fig. 5 A and 5B has the first embodiment according to assembly of the invention of aspiration device；
Fig. 6 A and 6B is according to the tripe systems in the sucking-off gap of the circumference of the device of Fig. 5 A and 5B
Type；
Fig. 7 A and 7B have the negative pressure device of integrated band flow constriction according to the present invention's
Another embodiment of device；
Fig. 8 is configured for insertion into the embodiment of the device of formula detector；With
Fig. 9 is according to the modification of the embodiment with flow constriction of Fig. 8.
Detailed description of the invention
Basically according to the fluid media (medium) for determining flowing of prior art shown in Figure 1A to 3
The various configuration of the device 110 of characteristic.According to prior art device 110 this can as following in detail
Being modified according to the present invention as thin elaboration, its mode is that this device 110 is by least one sucking-off
Device is added, as to elaborate further below.This device 110 is in an illustrated embodiment
It is configured to ultrasound wave air-flow sensors 112.But the present invention substantially also apply be applicable to other to be measured
Principle.
Figure 1A to 1C illustrates the first embodiment of device 110 with different views.Here, Figure 1A shows
Going out the axonometric chart of device 110, Figure 1B illustrates exploded view, and Fig. 1 C is shown in the flowing of fluid media (medium)
The axonometric chart that side looks up.These figures illustrate the most together.
As shown in Figure 1A to 1C, being provided with at least one flow duct 114.This flow duct 114
It itself can be the ingredient of device 110.But alternatively or additionally, this device 110 also may be used
To be configured for insertion into formula detector and to be only loaded in flow duct 114, as explained in further detail below
As stating.Especially flow duct 114 in this configuration or other configuration it is so structured that flowing pipeline section
116, this flowing pipeline section can be such as by one or more connecting elements 118, such as flange or similar
Connecting element 118 is linked in inlet manifold or other flow duct composite members.Flow duct 114 has one
The individual unlimited cross section 120 that can be flow through on flow direction 122 by fluid media (medium), including flow duct 114
Inwall 124, this inwall is by fluid media (medium) overflow.Flow duct 114 is the most also referred to as measured
Pipe.Also installing a sensor device 126 in flow duct 114, this sensor device can such as load
In opening 128 in flow duct 114 and illustrate with exploded view in fig. ib.Sensor device 126
The most illustratively include that there is lid 131 and the sensor housing of basic housing 138
130.This sensor device 126 can also include one or more control and analyze circuit 132, such as
Circuit board in one or more plug-in mountings and/or the form of other circuit carrier.In order to control and analyze electricity
The electrical contact on road 132, this sensor device 126 the most also includes that at least one is inserted
Connection device 133 in succession, the such as form in signal cable plug.Sensor device 126 can also be optional
Ground includes pressure transducer 134 and/or hygrosensor 140.Sensor device 126 is in shown reality
Execute and example includes cooling body 136 the most alternatively, such as, be used for cooling down control and analyzing circuit 132.In addition
It is preferably provided with the sensor element of the characteristic of fluid media (medium) for determining flowing in an illustrated embodiment
142, these sensor elements are configured to ultrasonic transducer 144 in an illustrated embodiment.They divide
But do not point to fluid media (medium) with the most sightless radiating surface 146 illustrated in fig. 1 c,
Wherein, ultrasonic signal can be exported to fluid media (medium) and/or from fluid media (medium) by radiating surface 146
Received ultrasonic signal.Ultrasonic transducer 144 can be constructed for the ultrasonic waves sent at this
Can device 148, for receive ultrasonic transducer 150 or be used as sending and using with dual-use function
In the ultrasonic transducer received, as shown in citing in Figure 1B, 1C and 2A.Different configurations and
Conversion is attainable.
Device 110 propagation time based on ultrasonic signal 152, such as base in an illustrated embodiment
Flowing velocity is measured in the propagation time of two ultrasonic signals 142.Air or fluid media (medium) flow at this
Cross flow duct 114 and from the other process of the ultrasonic transducer 144 being arranged on sensor housing 30,
This ultrasonic transducer is configured to ultrasound wave-transmitter-receiver-unit.Flow duct 114 can be such as
It is configured to cylindrical shell.Cross section 120 can such as be configured to circular at this, but the most also
Can have other cross section, such as polygonal crosssection.Pressure transducer 134 and temperature sensing
Device 140 is optional ingredient, hygrosensor can e.g. temperature measuring resistors, such as have
There is the measurement resistance of negative temperature coefficient (NTC).Such as hygrosensor 140 suits the particular use and also may be used
To save alternatively, because such as air themperature is equally tried to achieve by ultrasonic propagation time.Control
Can also be constituted in the way of shown in being different from fig. ib with analyzing circuit 132.
The cross section 120 of device 110 is shown with the direction of observation on flow direction 122 in fig. 1 c.
Can be seen that at this, device 110 preferably has at least one reflection for reflectance ultrasound ripple signal 152
Face 154.Correspondingly, ultrasonic signal 152 includes the beam sent the most alternatively
156 and reflection beam 158.Reflecting surface 154 is configured to the finger of bridging piece 160 in an example shown
To the surface of ultrasonic transducer 144, this bridging piece extend in cross section 120.Send by being used for
The beam 156 that sends of ultrasonic transducer 148 reflected by reflecting surface 154 and as reflection
Beam 158 to for receive ultrasonic transducer 150 reflect.
The modification of device 110 according to Figure 1A to 1C, they same bases shown in Fig. 2 A to 3
Corresponding to prior art on Ben, but they are modified according to the present invention and can pass through at least one
Aspiration device is added, as described in further detail below.At this in fig. 2 with perspective cross-sectional
Figure illustrates device 110 with the direction of observation towards ultrasonic transducer 152, therefore for most of elements
Explanation be referred to the explanation of Figure 1A to 1C.Fig. 2 B is with the most front watcher in the flowing direction
To illustrating the axonometric chart of device 110, and Fig. 3 illustrates and is flow through to enter on flow direction 122
The direction of observation of cross section 120 illustrates the top view of device 110.Especially obtained by according to the view of Fig. 3
Going out, the cross section 120 flow through is divided into two and the most mutually divides by reflecting surface 154 or bridging piece 160
The region opened, i.e. measured zone 162 and the region 164 being not used in measurement.Ultrasonic signal 152 is being surveyed
Amount is propagated in region 162.Region 162,164 can be separated from each other the most completely at this,
But can also be connected with each other.Same content is generally also applicable to the configuration according to Figure 1A to 1C.
In the configuration according to Fig. 2 A to 3, bridging piece 160 has relative to ultrasonic transducer 142
Concave curvatures.Reflecting surface 154 correspondingly bends.But in conversion, bridging piece 160 is also with it
Its mode bends or constitutes the most deviously, as shown in Figure 1A to 1C, or tilts straight
On the spot orient.Bridging piece 160 can be fixed in flow duct 114 securely, but fully or
Partly, alternatively or additionally can also be connected with sensor device 126, such as, fill with sensor
Put the sensor housing 130 of 126 to connect, as to elaborate further below.In this situation
Lower sensor device 126 can also completely or partially be configured to intrusion detector, and it can be consolidated
It is scheduled in flow duct 114.The inflow side of this external flow duct 114 is equally as the composition of device 110
Part or as separate part embodiment in Fig. 2 A is to 3 is provided with flowing grid 166.This stream
Dynamic grid 166 can fully or can also partly as at Fig. 2 A to covering cross section as shown in 3
120, this flowing grid is such as the most known by hot-film air-flow sensors.Especially can be fully
Or partly cover at least measured zone 162.Flowing grid 166 can such as be used for fluid medium
Flowing carries out rectification.
Due to beam dispersion (Strahlverwehungen), in the device 110 according to Figure 1A to 3,
At the ultrasonic transducer 148 for sending and the letter between the ultrasonic transducer 152 received
Number propagation time is (such as empty along with the fluid media (medium) flow through in the measurement plane of ultrasonic signal 152
Gas) speed and change.In order to equalization temperature is on the impact of ultrasonic velocity with thus to the propagation time
Impact and for compensating unit scattering and the drift of ultrasonic transducer internal 144, can be as above
A contrary secondary signal is sent shown in the embodiment in face.The transmitter of the first signal is second at this
The receptor of signal, vice versa.Tried to achieve with integral way along ultrasound wave loop by the method
Flowing velocity is together with the atmospheric density determined by pressure and temperature and by suitable calibration function
Under conditions of be generally given by the air mass flow of whole flow duct 114.But other analyzes method
And/or control method is the most also feasible.By calibration can set up calculate in measured zone
Quality stream in the cross section of 162 with by whole flow duct 114, i.e. by whole cross section 120
Quality stream between relation.
Naturally the ultrasound wave letter of reception can be affected along the velocity profile figure in ultrasound wave loop and flow regime
The quality of numbers 152.This flow regime can e.g. stratiform or can also be about disorderly
The difference of vertical scale and time scale be disorderly in manifesting and/or also include stratiform-disorder-upset and
Stable or the flow regime of instability.Ultrasonic signal 152 is through fluid media (medium) such as air
The most interruptedly to be reflected, scatter or to absorb depending on mobile section figure and flow regime.?
Make every effort in this meaning realize the most through-flow, such as in cross section 120 of cross section 120
Uniform as far as possible air quality, especially in measured zone 162, that is at cross section 120
As in the real part measuring cross section.Additionally, interfacial quantity keeps the least.Cause
This, strong unstable and disorder the flow regime in the measurement plane of ultrasonic signal 152 should
When being avoided by as far as possible by the measure in structure.For flow rectification and be consequently for reduce instability
The measure of flow regime be the flowing lattice at the region upstream for measuring shown in Fig. 2 A to 3
Grid 166.Be also used in measured zone 162 producing uniformly to favourable bridging piece 160 moulding of flowing,
The flowing of low disorder.
The geometric modeling of air guide system and air matter at sensor device 126 upstream and downstream
Each value existed of amount stream causes different the most in means 110 inside flow duct 114 at this
Flow regime layer.Such as, inwall 124 and the reflecting surface 154 of flow duct 114 is situated between by fluid respectively
The surface 168 of matter overflow, as shown in FIG. 3.On surface 168, especially form Flow regime layer
170,172, they highlight in figure 3.Here, represent inwall 124 by reference 170
Surface 168 region in Flow regime layer, and represent reflecting surface 154 by reference 172
Surface 168 region in Flow regime layer.Flow regime layer 170,172 schematically illustrates at this.
In the framework of the present invention, the flowing velocity reduction of Flow regime layer generally especially can be referred to as at this
Layer, such as compared with the core flowing fully appeared in the minds of in other cross section 120 opened wide.
Flow regime layer 170,172 especially constructs on inwall 124 and structure in shown device 110
On the reflecting surface 154 with the spread length increased on flow direction 122.These Flow regimes
Layer 170,172 can have different flow regimes.This most illustratively shows by flow simulations
Go out.Here, reference 168 represents surface 168 again, Flow regime layer is in flowing on a surface
Constitute during 122 overflow of direction and reference 152 represents contrary ultrasonic signal, wherein,
The ultrasonic transducer 144 of sensor device 126 can such as be distinguished once as transmitter and once
Occur as receptor.Flow regime layer 170,172 can have different stream as shown in FIG. 4
Move the flow regime 174 of state, i.e. stratiform, the transitive state 176 of stratiform-disorder and occur disorderly completely
Disorderly flow regime 178.According to the flowing towards sensor device 126, can be in measured zone
The region of 162 exists the combination of these states, such as, develops along flow direction 122 according to Fig. 4,
This development illustrates from the laminar flow state 174 of the porch in flow duct 144 through stratiform-disorder mistake
Cross state 176 and be transitioned into the flow regime 178 of disorder.These flow regimes allow such as by digital stream
Move emulation and/or empirically determine.Fig. 4 illustrates that for this ultrasonic signal 152 propagates through Flow regime
The disorderly flow regime 178 in face 170,172.The flow regime 178 of this disorder containing different time and
The whirlpool of longitudinal scale.This causes uneven speed, pressure and density region.Uneven by this
Region time, ultrasonic signal 152 interrupts on multiple separating surfaces and/or scatters, the most generally
To the signal de-emphasis of ultrasonic signal 152 with obtain the ultrasound beamformer of ultrasonic signal 152 in addition
Characteristic changing.Two kinds of effects can cause even not realizing speed at the operation time point determined and survey
Amount.
The present invention has task relative to this, is i.e. used in the device 110 of the above-mentioned type or at other
Determine the fluid media (medium) of flowing characteristic device 110 in improve ultrasonic signal quality.Transport at each
In row state, especially can realize tachometric survey at this and improve relative to Flow regime layer 170,172
Different running statuses and the vigorousness of thus flow regime.As it appears from the above, the one of the present invention basic
Design is at least in part, preferably entirely sucking-off Flow regime layer 170,172, such as in reflection
On face 154 and/or on inwall 124 and/or at least one the other surface within device 110
On 168.Allow especially to reduce in the case of flowing through corresponding surface 168 mussily flowing in like fashion
The boundary thickness of boundary layer 170,172 or even realize the laminarization of Flow regime layer 170,172.
Therefore, ultrasonic signal quality can be enhanced, and allows at least complete in each running status
Realize tachometric survey.Additionally, it is permissible relative to the measurement vigorousness of different running statuses and flow regime
Significantly improve.Correspondingly proposing according to the present invention, this device 110 arranges at least one aspiration device 180,
At least one stream that this aspiration device is arranged at least one surface 168 of sucking-off at least in part
Dynamic boundary layer 170,172, this surface is by fluid media (medium) overflow.Correspondingly, such as according to Figure 1A
Device 110 to the embodiment of 3 can be extended by this kind of aspiration device 180.
An embodiment according to assembly of the invention 110 is shown in Fig. 5 A to 6B.At this Fig. 5 A
Illustrating the perspective general view of this device 110 with aspiration device 180, this aspiration device is in flowing side
Can such as be arranged on before the device 110 according to Figure 1A to 1C on 122.This aspiration device 180
Can especially be configured to top cover 182 at this, this top cover is arranged on flowing pipeline section on flow direction 122
Before 116.Top cover 182 can such as include cylinder 184, and this cylinder is flow duct 114 the most equally
Ingredient so that flow duct 114 except flowing pipeline section 116 in addition to can also include top cover 182,
Being provided with sensor device 126 in this flowing pipeline section, this top cover is arranged on flowing pipeline section in the flowing direction
Before 116.Fig. 5 B illustrates the connecting element 186 for being connected by top cover 182 with flowing pipeline section 116,
This connecting element is such as configured to the flange with sealing member 188.Additionally, according to Fig. 5 B's
Shown in view, aspiration device 180 includes a sucking-off gap 190 in an illustrated embodiment.This sucking-off
Gap 190 can such as be configured to circular passage and can such as annular ground or annulus section shape ground structure
Become.Sucking-off gap 190 is example, i.e. an opening of sucking-off fluidic junction 192 in this embodiment,
It can be loaded negative pressure.It can pass through one at Fig. 5 A and 5B by outside sucking-off adapter 194
Not shown in sucking-off passage connect, wherein, by sucking-off adapter 194 can connect an outside bear
Pressure device, such as pump.
Fig. 6 A and 6B illustrates a cross section 120 entering the device 110 according to Fig. 5 A and 5B
In view, direction of observation is contrary with flow direction 122, that is contrary with the view according to Fig. 1 C
Direction of observation on, therefore the element for this view is referred to the explanation according to Fig. 1 C.Here,
Fig. 6 A illustrates an embodiment, wherein sucking-off gap 190 be constructed around, the sucking-off seam of annular
Gap 190, and an embodiment is shown in fig. 6b, wherein sucking-off gap 190 is not about whole
Circumferential ring around, but be only configured to the sucking-off gap 190 of annular and be provided only on surface 168
In upper segment before ultrasonic transducer 144.Such as, the annulus section in sucking-off gap 190 includes
The position at 11 o'clock to 1 o'clock, i.e. only one are arranged on the region before sensor device 126.
But other configuration is the most also feasible.But the ring segment-shaped sucking-off gap 190 of circle should be in institute
Being arranged under there is something special in a sector, this sector is associated with measured zone 162 and especially sets
Put before sensor device 126.But other configuration is the most also feasible.
For having built at sensor device 126 and/or measured zone 162 upstream the most as shown in Figure 4
The operating point of vertical disorderly Flow regime layer 170,172, the Flow regime layer 170,172 of this disorder
Thickness can reduce by aspiration device 180 or even realize relaminarization.Sucking-off gap 190
Circular passage in the device according to Fig. 5 B preferably relatively close to flow pipeline section 116 entry cross-section
Face, in order to avoid the boundary layer that gets muddled along with the spread length on flow direction 122 again
Set up and re-form.In the modification shown in Fig. 6 B, it be not arranged on whole circumference but
Before only one is justified in section, is such as arranged in the region of ultrasonic transducer 144, only realize
The sucking-off of local.But due to the interferencing propagation from the boundary layer outside sucking-off annulus section, sucking-off district
The excitation of the interference in the wall boundary layer in territory and/or instigate and thus to the mistake of disorderly flow regime
Cross be it is contemplated that.The most preferably according to the change on whole annular ring peripheral with aspiration device of Fig. 6 A
Type.
For the annulus according to Fig. 5 A to 6B or the sucking-off gap in the sucking-off gap 190 of annulus section form
190 alternatively or additionally, and sucking-off fluidic junction 192 can also otherwise realize.Such as sucking-off converges
Conjunction portion 192 can also realize on the reflecting surface 154 of bridging piece 160, is preferably provided at reflector space
(see Fig. 2 A) before 196, in reflector space in the operation of device 110 ultrasonic signal 152
Reflected.All modification reduce the disorderly Flow regime layer on one or more surface 168 together
170, the thickness of 172.
In order to realize required negative pressure in the region of at least one sucking-off fluidic junction 192, it is considered to internal
And/or the negative pressure source of outside.Therefore, it can such as use an external pump and/or the motor part of outside,
It such as may be coupled in the sucking-off adapter 194 according to Fig. 5 A.Alternatively or additionally, in order to produce
Raw negative pressure, this is particularly preferred for cost consideration for batches of realization, it is also considered that negative pressure source
The internal negative pressure source of passive way of realization, the pump part the most do not moved, in particular according to Bernoulli Jacob imitate
Should.Therefore there is the probability producing negative pressure in flowing in accelerating, according to by bernoulli formula
The relation between speed and pressure known, such as by one or more integrated in means 110
Negative pressure device 198.Embodiment shown in Fig. 7 A, 7B and 9.Can utilize at this, cross section
120 are divided into measured zone 162 in device 110 embodiment the most shown and are not used in
The region 164 measured.Correspondingly, negative pressure device 198 such as includes accelerator 200, and this adds quick-mounting
Put and such as can be arranged for by least one contraction elements 201 in the region being not used in measurement
Flow constriction is caused in 164.This contraction elements 202 can such as be configured to flow domatic 204, should
Flow domatic on flow direction 122 that is in Fig. 7 A and 7B by plan direction out
The flow cross section being not used in the region 164 of measurement is made to shrink.Correspondingly Fig. 7 B is shown according to figure
The embodiment of the section by flowing domatic 204 of the section upstream of 7A.Domatic here it can be seen that flow
Hierarchically or continuously become big, wherein, be not used in the flow cross section in region 164 of measurement in flowing
Narrow on direction.Therefore, the region according to Fig. 7 A strong contraction forms negative pressure region 206.Should
Negative pressure region can pass through the sucking-off fluidic junction that at least one sucking-off passage 208 is above-mentioned with at least one
192 connect.In embodiment shown in fig. 7, sucking-off passage 208 and the suction on reflecting surface 154
Go out region 210 preferably anteriorly and to connect in ultrasonic transducer 144 upstream at reflector space 196
Connect.On the top edge of inwall 124, the sucking-off gap 190 of annulus section form it is provided with the most again at this,
And in conversion or additionally, reflecting surface 154 is provided with at least one sucking-off gap 190.
Flow domatic 204 domatic cross section the most preferably have at least one blowout opening 202, this blows
Go out opening to be connected with at least one sucking-off fluidic junction 192 by least one sucking-off passage 208.For
At least one is used to have the flowing domatic 204 of the cross section increased on flow direction 122 in conversion
Or additionally, it is also considered that other type of contraction elements 202.Flow domatic 204 domatic cross section exist
Distribution on flow direction 122 determines the size of attainable negative pressure.The least beginning is transversal
Face (see such as Fig. 7 B) and domatic the biggest cross section (figure in the region of blowout opening 212
7A) therefore can be as calculating baseline substantially.For the accelerator 202 according to Fig. 7 A and 7B
Layout alternatively or additionally, it is considered to other position.Therefore domatic 204 or contraction elements are flowed
202 can the most alternatively or additionally be also disposed on other position within flow duct 114, such as
6 o'clock of inwall 124 in fig. 7 is set on position.Only in the layout within measured zone 162,
I.e. in flow duct 114, layout above bridging piece 160 should be avoided, because flowing in this arrangement
Dynamic ratio and thus signal quality may adversely be changed at the operating point determined.For at Fig. 7 A and
Contraction elements 202 alternatively or additionally, such as can be also disposed at bridge joint by the layout shown in 7B
The sensing of sheet 160 is not used on the side in region 164 of measurement.
The most repeatedly as explanation, flow duct 114 and/or flowing pipeline section 116 need not be
The ingredient of device 110.Device 110 the most can completely or partially be configured to plug-in type
Detector 214 or include this intrusion detector 214.The embodiment of this composition is at Fig. 8 and 9
Shown in.Such as intrusion detector 214 is inserted in flow duct 114 or flowing pipeline section 116,
Such as at air-deflector and connected, such as screw.Intrusion detector can be this
Such as include one or more retaining element 216, such as screwed hole or threaded openings.Reflecting surface 154
Can be connected with sensor housing 130 or intrusion detector housing in this intrusion detector modification.
Bridging piece 160 can such as by connect sheet 218 be connected on sensor housing 130 or with this biography
Sensor housing is integrally formed.It is also contemplated that reflecting surface 154 or bridging piece 160 connect unit by other
Part, such as connected by the connection sheet 218 (such as taking the shape of the letter U or L-shaped) of other quantity.
In the device 110 according to Fig. 8 can also an integrated aspiration device 180 according to the present invention,
Such as according to the aspiration device one of previous embodiment Suo Shu.Fig. 9 illustrates an embodiment, wherein inhales
Go out device include again being configured to flowing domatic 204 the accelerator 200 of contraction elements 202 form.It
It is arranged in the embodiment shown in fig. 9 on the bottom surface 220 of bridging piece 190 that is is arranged on from one
Individual measured zone 162 refer to from side on.Such as flow and domatic 204 can be integrated in bridging piece 160
In bottom side 220 or suit thereon.Realize generation and the cancellation of the negative pressure for sucking-off there.
Can be provided with again sucking-off passage 208, this sucking-off passage can be with at least one such as sucking-off gap 190
The sucking-off fluidic junction 192 of form connects, in order to reduce the Flow regime layer 172 on reflecting surface 154.Right
In sucking-off gap 190, such as carrying out the channel section form of sucking-off in the region of reflecting surface 154
Sucking-off gap alternatively or additionally, can arrange other sucking-off fluidic junction 192.In conversion or additional
Ground, it is also possible to the region before ultrasonic transducer 114 is entered on the inwall 124 of flow duct 114
Row sucking-off.This such as can be accomplished by according in the configuration of Fig. 9: one or more
Sucking-off passage 208 leads up to the most unshowned one or more sucking-off by connecting sheet 218
Gap 190, such as according to the configuration in Fig. 6 A and/or 6B.Other configurations various be it is contemplated that.
Claims (16)
1. for detecting the device (110) of at least one characteristic of the fluid media (medium) of flowing, wherein, institute
State device (110) and there is at least one for the sensor device (126) detecting described characteristic, described
Device (110) also includes that at least one can be by the surface (168) of fluid media (medium) overflow, described device (110)
Also include that at least one aspiration device (180), described aspiration device (180) are arranged at least portion
Divide at least one the Flow regime layer (170,172) on surface (168) described in ground sucking-off.
Device the most according to claim 1 (110), wherein, described sensor device (126)
Including at least one ultrasonic transducer (144) with at least one is for the reflection of reflectance ultrasound ripple signal
Face (154), wherein, described aspiration device (180) be arranged for by described Flow regime layer (170,
172) from described reflecting surface (154) sucking-off at least in part.
Device the most according to claim 1 and 2 (110), wherein, described device (110)
Including at least one flow duct (114), wherein, described aspiration device (180) is arranged at least
The partly Flow regime layer (170,172) on the inwall (124) of flow duct described in sucking-off (114).
Device the most according to claim 3 (110), wherein, described aspiration device (180)
Including at least one the sucking-off gap (190) on described inwall (124).
Device the most according to claim 3 (110), wherein, described device (110) is at least
Partially constitute as intrusion detector (214) and be arranged for being inserted into flow duct (114)
In, described aspiration device (180) is at least partially integrated in described intrusion detector (214).
Device the most according to claim 1 and 2 (110), wherein, described aspiration device (180)
It is at least partially disposed on described sensor device (126) upstream and/or at described sensor device
(126) in region.
Device the most according to claim 1 and 2 (110), wherein, described aspiration device (180)
Including at least one sucking-off fluidic junction (192).
Device the most according to claim 1 and 2 (110), wherein, described aspiration device (180)
Including at least one sucking-off pump and/or at least one is for connecting the sucking-off adapter of outside negative pressure device
(194)。
Device the most according to claim 1 and 2 (110), wherein, described aspiration device (180)
Including an integrated negative pressure device, described integrated negative pressure device is arranged for inside fluid media (medium)
Produce pressure drop and for described sucking-off.
Device the most according to claim 1 and 2 (110), wherein, described aspiration device (180)
Including at least one for accelerating at least one of accelerator (200) of fluid media (medium), described suction
Go out device (180) to be arranged for making described Flow regime layer (170,172) towards fluid media (medium)
Accelerating part moves forward.
11. devices according to claim 10 (110), wherein, described accelerator (200)
Being arranged for causing at least one flow constriction, fluid media (medium) is in the region of described flow constriction
In accelerated.
12. devices according to claim 1 and 2 (110), wherein, described aspiration device (180)
Including at least one for the contraction elements (202) of contraction flow cross section, wherein, described sucking-off fills
At least one the sucking-off passage (208) putting (180) leads to described flowing horizontal stroke from sucking-off region (210)
Contraction flow region in cross section.
13. devices according to claim 1 and 2 (110), wherein, described device (110)
For detecting the air quality in internal combustion engine.
14. devices according to claim 4 (110), wherein, at least one sucking-off described is stitched
Gap (190) is annular and/or the ring segment-shaped sucking-off gap (190) of circle.
15. devices according to claim 7 (110), wherein, at least one sucking-off described converges
Conjunction portion (192) is at least one sucking-off gap (190).
16. devices according to claim 12 (110), wherein, described at least one be used for receiving
The contraction elements (202) of contracting flow cross section is at least one flowing domatic (204).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010030438 DE102010030438A1 (en) | 2010-06-23 | 2010-06-23 | Device for detecting property e.g. velocity of air mass in motor car, has suction apparatus partly sucking flow barrier layer at fluid medium rush overable surface area, and sensor device detecting property of flowing fluid medium |
| DE102010030438.7 | 2010-06-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102297704A CN102297704A (en) | 2011-12-28 |
| CN102297704B true CN102297704B (en) | 2016-12-07 |
Family
ID=45115739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110181448.4A Expired - Fee Related CN102297704B (en) | 2010-06-23 | 2011-06-23 | For detecting the device of the characteristic of the fluid media (medium) of flowing |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102297704B (en) |
| DE (1) | DE102010030438A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2638368B1 (en) * | 2010-11-11 | 2021-01-06 | SSI Technologies, LLC. | Systems of determining a quality and/or depth of diesel exhaust fluid |
| DE102012205683A1 (en) | 2012-04-05 | 2013-10-10 | Robert Bosch Gmbh | Flow sensor for detecting e.g. property of air in air intake of internal combustion engine of car, has reflector element for reflecting signals, where cooling body and reflector element are mechanically connected with one another |
| DE102012209149A1 (en) | 2012-05-31 | 2013-12-05 | Robert Bosch Gmbh | Ultrasonic sensor e.g. ultrasonic flow meter for detecting property of fluid medium in air tract of engine of motor vehicle, has flow control element which is comprised in upstream and downstream of measuring element |
| DE102013200344A1 (en) * | 2013-01-11 | 2014-07-17 | Robert Bosch Gmbh | Sensor arrangement for determining flow characteristic of fluid medium, particularly intake air mass of internal combustion engine, has wing grid which is arranged in main flow direction upstream of plug-in sensor |
| DE102013202850A1 (en) * | 2013-02-21 | 2014-08-21 | Landis+Gyr Gmbh | Flowmeter with a sound transducer comprehensive measuring insert |
| DE102013202852A1 (en) * | 2013-02-21 | 2014-08-21 | Landis+Gyr Gmbh | Flow meter with a measuring insert that can be inserted into a housing |
| CN103776497B (en) * | 2014-01-26 | 2017-09-01 | 哈尔滨工业大学（威海） | A kind of flowmeter ultrasonic sensor |
| CN105181044B (en) * | 2015-05-15 | 2018-02-27 | 浙江天信仪表科技有限公司 | A kind of ultrasonic flowmeter |
| DE102017205838A1 (en) * | 2017-04-05 | 2018-10-11 | Robert Bosch Gmbh | Sensor element for detecting at least one property of a fluid medium |
| DE102017206226A1 (en) * | 2017-04-11 | 2018-10-11 | Robert Bosch Gmbh | Sensor for detecting at least one property of a fluid medium |
| CN108318081B (en) * | 2018-03-30 | 2024-04-09 | 惠州华阳通用电子有限公司 | Device for detecting air quality inside and outside automobile |
| DE102019009033A1 (en) * | 2019-12-31 | 2021-07-01 | Marquardt Gmbh | Unit for a fluid line |
| CN114580221B (en) * | 2022-05-07 | 2022-07-22 | 中国空气动力研究与发展中心计算空气动力研究所 | Method for rapidly calculating cross-basin gap flow |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102010030438A1 (en) | 2011-12-29 |
| CN102297704A (en) | 2011-12-28 |
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