阅读说明：本技术 超声波流量测量装置 (Device for measuring ultrasonic wave flow ) 是由 P.亨茨曼 T.西格里斯特 于 2018-04-19 设计创作，主要内容包括：本发明涉及一种流量测量装置(20),带有至少两个彼此间隔开布置的传感器(12、14；12a、14a),否则所述流量测量装置不包括经常必需的测量管,其中,传感器分别处在从规定用于安装在管区段的法兰面上的环形的承载件(24)出发的突出部(30、32；30a、32a)的自由的端部上。所述流量测量装置能借助环形的承载件安放在管路(10)的两个管段(26、28)之间。突出部垂直于或至少基本上垂直于由承载件限定的平面取向。各两个传感器限定了信号路径(34、34a)并且该信号路径包括垂直于由承载件限定的平面的分量(38)。在正好四个传感器和相应地四个突出部的情况下,各两个传感器形成了一个传感器对并且承载这些传感器的突出部形成了突出部对,并且在每个突出部对中,在每个突出部对中,要么每个突出部从所述承载件出发沿另一个方向指向,要么在沿同一方向指向的突出部中,所述突出部不一样长。(The present invention relates to a kind of flow measurement device (20), the sensor (12,14 that is separated from each other arrangement at least two；12a, 14a), otherwise the flow measurement device does not include often required measurement pipe, wherein sensor is in the load-bearing part (protruding portion (30,32 of 24)s of the annular on the flange face from regulation for being mounted on tube section respectively；30a, 32a) free end on.The flow measurement device can be placed between two pipeline sections (26,28) of pipeline (10) by the load-bearing part of annular.Protruding portion perpendicular to or be at least substantially orthogonal to the planar orientation limited by load-bearing part.Each two sensor definitions signal path (34,34a) and the signal path include the component (38) perpendicular to the plane limited by load-bearing part.In the case where just four sensors and correspondingly four protruding portions, each two sensors, which form a sensor pair and carry the protruding portions of these sensors, forms protruding portion pair, and in each protruding portion pair, in each protruding portion pair, each protruding portion is directed toward from the load-bearing part along another direction, in the protruding portion being directed toward in the same direction, the different length of protruding portion.)

1. flow measurement device (20), the sensor (12,14 that is separated from each other arrangement at least two；12a, 14a), In, flow measurement device (20) can be placed between two pipeline sections (26,28) of pipeline (10) by the load-bearing part (24) of annular, Wherein, annular load-bearing part (24) provides the flange face for being mounted on the tube section of pipeline (10),

Wherein, sensor (12,14；12a, 14a) it is in respectively from the annular load-bearing part (protruding portion (30,32 of 24)s； 30a, 32a) free end on,

Wherein, protruding portion (30,32；30a, 32a) perpendicular to or be at least substantially orthogonal to be limited by load-bearing part (24) flat Planar orientation, and

Wherein, each two sensors (12,14；12a, 14a) define signal path (34,34a) and the signal path (34,34a) include the component (38) perpendicular to the plane limited by load-bearing part (24).

2. flow measurement device (20) described in accordance with the claim 1,

Wherein in exactly two sensor (12,14；12a, 14a) and correspondingly two protruding portions (30,32；30a, 32a) In the case of, each protruding portion (30,32；30a, 32a) from the load-bearing part (24)s along another direction be directed toward, or

Wherein at two from the load-bearing part (protruding portion (30,32 that 24)s were directed toward in the same direction；30a, 32a) in, The protruding portion (30,32；30a, 32a) different length.

3. flow measurement device (20) described in accordance with the claim 1,

Wherein in just four sensors (12,14；12a, 14a) and correspondingly four protruding portions (30,32；30a, 32a) In the case of, each two sensors (12,14；12a, 14a) it forms sensor pair and carries the protruding portion of the sensor (30,32；30a, 32a) protruding portion pair is formd, and

Wherein in each protruding portion pair or each protruding portion (30,32；30a, 32a) from the load-bearing part (24)s It is directed toward along another direction or in the protruding portion (30,32 being directed toward in the same direction；30a, 32a) in, the protruding portion (30, 32；30a, 32a) different length.

4. according to flow measurement device described in any one of preceding claims (20), wherein the protruding portion (30,32； 30a, 32a) it is integrally connected with the load-bearing part (24).

5. according to flow measurement device described in any one of preceding claims (20), wherein each sensor (12,14； 12a, 14a) in corresponding protruding portion (30,32；30a, 32a) end on be embedded to the protruding portion (30,32；30a, 32a) Material in.

6. according to flow measurement device described in any one of preceding claims (20), in the protruding portion (30,32； 30a, 32a) end on ultrasonic sensor (12,14；12a, 14a).

Technical field

The present invention relates to a kind of flow measurement device, i.e., a kind of regulation is for exporting the flow velocity volume to the medium for flowing through pipeline The flow measurement device of the measured value of code.

Background technique

This flow measurement device is commonly known per se.Such as at two axially spaced ultrasonic sensors along measurement pipe In a measurement pipe.In the medium for flowing through measurement pipe, by two ultrasonic sensors towards another supersonic sensing The ultrasonic signal that the direction of device issues is propagated at least partially along the flow direction of medium, and the ultrasound issued in opposite direction Wave signal is correspondingly at least partly propagated against the flow direction of medium.Surpassed by finding out what is propagated along the flow direction of medium Acoustic signals and against medium flow direction propagate ultrasonic signal between propagation time difference, can be in known manner It finds out the flow velocity of medium and finds out the volume flow by measurement pipe with the cross-sectional area of the flow velocity and well known measurement pipe.

But this measurement pipe is not light, improve the price of flow measurement device and improve transport and storage at This.

A kind of ultrasonic wave flow measuring meter as known to 2010/002432 A1 of WO, is directed in pipe, fluid is in pipe The ultrasonic wave flow measuring meter is flowed through in pressure.The flow measuring meter includes the measurement body of signal processing unit and tubulose, the survey Amount body bears pipe internal pressure and there is no from the inside of pipe to the pressure difference in outside.The pipe has drilling, and fluid flows through this Drilling.The flow measuring meter further includes the converter in the opposed acoustics in flowing upstream and flow downstream, the change of the acoustics Parallel operation be arranged in measurement body in, measurement body bear pipe internal pressure and not the inside of pipe to outside any pressure difference and form In at least one sound travel flowed on stream and connection is in signal processing unit.Finally, the flow measuring meter includes using The mechanism of counter ontology is installed, which bears the inside of pipe to the pressure difference in outside in Yu Guan.

A kind of sensor device as known to CN204718761U, in the sensor device, flow sensor is by sealing Device is connected on pipeline, that is, is connected on the connecting portion of two pipeline parts of pipeline.There is a hole in sealing device, leads to Toward in the piping connection to the hole of sensor.Possible leakage should be identified by the sensor.The sensor is not suitable for For determining the flowing velocity of the medium flowed in pipeline.

1 915 324 A1 of DE illustrates a kind of flow-sensint unit of magnetic induction, is inserted into the section of pipeline.It is described Flow-sensint unit has the shape of hollow cylinder and sticks on the inner wall of pipeline.Along the conductor of hollow cylinder longitudinally extended Or coil is in the inside of hollow cylinder.Fixation of the flow-sensint unit in pipeline by forming and the flange that is outwardly oriented It completes, the flange is clamped in two of pipeline parts faces each other there on the connecting portion of two pipeline parts of pipeline Between the flange on opposite.

Summary of the invention

The task of the present invention is illustrate flow measurement device of the type mentioned at the beginning, which does not need to survey It buret and however remains to simply use.

According to the present invention, the task by it is a kind of have the right to require 1 feature flow measurement device solve.

Therefore at least two be separated from each other arrangement sensor flow measurement device in provide, the flow survey Amount device can be placed between two pipeline sections of pipeline by the load-bearing part of annular.The load-bearing part regulation of annular is configured to pacify On the flange face of the tube section of pipeline.Sensor is in respectively using the load-bearing part of annular as the freedom of the protruding portion of starting point On end.The protruding portion perpendicular to or be at least substantially orthogonal to the planar orientation limited by load-bearing part.Each two sensors It defines a signal path and the signal path includes the component perpendicular to the plane limited by load-bearing part.

The flow measurement device for this provision, with its load-bearing part how at two here and hereinafter synoptically Sealing device referred to as is installed between the pipe-of pipeline section or the end of flexible tube section.In mounted condition, the protruding portion is extend into In at least one pipeline section in the pipeline section.In the protruding portion being directed toward from load-bearing part towards same direction, these protruding portions are stretched Enter one of pipeline section.From the protruding portion that load-bearing part is directed toward in different directions, at least one protruding portion protrude into pipeline section together And at least another protruding portion protrudes into another pipeline section.Direction and/or length based on protruding portion are ensured in two sensors Or the signal path between each two sensors, including the component perpendicular to the plane limited by load-bearing part.This component is parallel Extend in the flow direction for the medium for flowing through corresponding pipeline section.Therefore acoustical signal, particularly ultrasonic wave can be believed by above-mentioned Number propagation time difference observation determine medium flow velocity.

It is an advantage of the current invention that flow measurement device does not need and including measurement pipe.When installing flow measurement device, The protruding portion of the flow measurement device is imported into pipeline section, and load-bearing part is mounted on the pipeline section.Therefore flow measurement device compares The well known flow measurement device including measurement pipe is smaller and lighter.Load-bearing part has a thickness, and the thickness is corresponding by the order of magnitude The thickness of sealing device.Therefore flow measurement device is inserted into existing pipe-line system or hose system in which can be convenient, and The length of existing pipeline need not be adjusted thus.

The advantageous design scheme of flow measurement device proposed by herein is the theme of dependent claims.Made at this In claim return draw (R ü ckbeziehung) show it is further by the feature of corresponding independent claims Construction refers to claimed subject matter.Draw feature or the feature combination for not being not understood as abandoning to independent claims for described time The independent acquirement specifically protected.In addition, the explanation in view of claim and specification is further being embodied in As starting point when feature in independent claims, that is, in the claim before corresponding and specific flow is surveyed It measures in a kind of universal form of implementation of device and this limitation is not present.In the description to several aspects of independent claims Reference therefore be also understood to be the explanation to optional feature in the case where no special prompt.

In a kind of embodiment of flow measurement device, in exactly two sensor and correspondingly feelings of two protruding portions Under condition, each protruding portion is directed toward from load-bearing part towards another direction, and at two from load-bearing part towards same direction In the protruding portion of direction, the protruding portion then different length.Just four sensors and correspondingly four protruding portions the case where Under, each two sensors, which form a sensor pair and carry the protruding portions of these sensors, forms protruding portion pair.So Afterwards in each protruding portion pair or each protruding portion from load-bearing part to another way be directed toward or protruding portion along same Different length in the protruding portion that one direction is directed toward.In all these embodiments, it is ensured that in two sensors or two each Signal path between sensor includes the component perpendicular to the plane limited by load-bearing part, thus such energy as described above Find out propagation time difference.

In a kind of specific implementation of flow measurement device, protruding portion is integrally formed on load-bearing part.It is described Then load-bearing part is for example made of plastics and can manufacture in a procedure.

In another specific implementation of flow measurement device, each sensor is in the end of corresponding protruding portion On be embedded in the material of protruding portion.Sensor is not damaged and is protected when being protected in flow measurement device transport there It will not be damaged due to corresponding medium.

In yet another embodiment, flow measurement device has ultrasonic sensor conduct on the end of protruding portion Sensor.Then flow measurement device works as device for measuring ultrasonic wave flow.

Next the embodiment of the present invention is illustrated in detail by attached drawing.The theme or element to correspond to each other is in all the appended drawings It is equipped with identical appended drawing reference.

Described or each embodiment must not be not understood as limitation of the present invention.More precisely, in presently disclosed model Additional project and amendment scheme are also entirely possible in farmland, and especially this additional project and amendment scheme are also entirely possible, Its spy for example by individually illustrating in conjunction with common or special specification part and including in claim and/or attached drawing The combination or modification of sign make technical staff in view of solution task and it is contemplated that and the feature by that can combine cause one it is new Theme or new method and step.

Detailed description of the invention

In figure:

Fig. 1, Fig. 2 and Fig. 3 show the basic principles of the flowing velocity for the medium that pipeline is flowed through with ultrasonic measurement；

Fig. 4 is a kind of embodiment of flow measurement device proposed herein；And

Fig. 5 is the another embodiment of flow measurement device proposed herein.

Specific embodiment

Flowing velocity by medium of the ultrasonic measurement in pipeline 10 is known per se.The diagram of Fig. 1, Fig. 2 and Fig. 3 are shown The simplification of meaning property shows different configurations.Then a sensor pair is arranged for pipeline 10, medium flows through the pipeline, should find out The flowing velocity of medium.The sensor is to including the first ultrasonic sensor 12 and the second ultrasonic sensor 14.Two It is also only individually referred to as sensor 12,14 sometimes below and is collectively referred to as the work of ultrasonic sensor 12,14 of sensor 12,14 It works for ultrasound transmitter device and ultrasonic receiver.Sensor 12,14 is along flow direction, the i.e. edge for the medium for flowing through pipeline 10 Pipeline 10 is arranged axially spaced from each otherly.

Two sensors 12,14 work (fungieren) together as flow measurement device 20.Sensor 12,14 Sensor signal is not shown in figs. 1 to 3 by the assessment device 22(for belonging to flow measurement device 20；Referring to Fig. 4) assessment, For obtaining the volume flow (Volumenstrom) of the measured value or corresponding medium that are directed to flowing velocity.

In the wall for the section that the sensor 12,14 of flow measurement device 20 is often integrated in pipeline 10 or through this area The tube wall of section.Then pipe section also belongs to flow measurement device 20 and commonly referred to as measurement pipe.This measurement pipe is two Side is respectively provided with flange and is inserted into the measurement pipe of the flow measurement device accordingly to install flow measurement device 20 Pipeline 10 in.In a kind of embodiment of not measurement pipe of flow measurement device 20, sensor 12,14 is independent (einzeln) it is sleeved on the outer surface of pipeline 10.

It two sensors 12,14 or works as the transmitter of ultrasonic signal or as receiver.For this purpose, Each sensor 12,14 for example includes the crystal (Kristall) of piezoelectricity in a manner of well known in principle.By the crystalline substance of the piezoelectricity The active of body excites, and corresponding sensor 12,14 just produces ultrasonic signal, another sensor 12,14 is based on passively It excites the crystal of its piezoelectricity and receives the ultrasonic signal.

In order to find out the flowing velocity of corresponding medium, assessed in a per se known way by one of sensor 12,14 ( One sensor 12) be sent to corresponding another sensor 12,14(second sensor 14) ultrasonic signal propagation time difference (Laufzeitunterschiede).Specifically, it is contemplated that issued in the flow direction with medium from first sensor 12 Ultrasonic signal to second sensor 14 and first sensor is emitted to from second sensor 14 against the flow direction of medium Propagation time difference between 12 ultrasonic signal.Flowing velocity is higher, and the ultrasonic wave issued against the flow direction of medium is believed Number propagation time of ultrasonic signal for issuing of propagation time flow direction longer and with medium it is shorter.

In order to measure this propagation time difference, need a measuring section, i.e., between at least two sensors 12,14 between Away from.It is directed in the diagram of Fig. 1 to Fig. 3 by the measuring section that the corresponding spacing of sensor 12,14 generates and is shown not there Same configuration is marked with d.This measuring section makes the flow measurement device 20 with measurement pipe be based on space requirement just to be become first Not light (unhandlich).In the flow measurement device 20 of not measurement pipe, each sensor 12,14 must individually pacify It puts, it is necessary to extremely precisely measure corresponding spacing and assess device 22 and parameterized according to measured spacing.

A kind of embodiment for diagrammatically showing flow measurement device 20 proposed herein of Fig. 4.This flow measurement Device can be placed between two pipeline sections 26,28 of pipeline 10 and shown in by Flange-shaped Parts, annular load-bearing parts 24 It is placed in this form in configuration.RE refers to corresponding tube end or tube section ends.Appended drawing reference A refers to pipe axis or pipe Road axis.It can also be considered as the axis of symmetry of the pipe or pipeline section 26,28 of typically rotational symmetry.The protrusion of at least two finger-like Portion 30,32 protrudes from load-bearing part 24 perpendicular to the plane earth limited by load-bearing part 24.The surface normal allusion quotation of the plane limited in this way Type it is parallel to pipe axis A extension.Protruding portion 30,32 extends into one of pipeline 26,28, more specifically or each dashes forward Portion 30,32 extends into one of pipeline section 26,28 out or two protruding portions 30,32 extend into the same pipeline section 26,28.It passes Sensor 12,14, especially ultrasonic sensor 12,14 are on the free end of each protruding portion 30,32.

The spacing needed for the function of flow measurement device 20 between sensor 12,14 has been obtained as follows, that is, The protruding portion 30,32 of finger-like otherwise in different directions be directed toward or in the protruding portion 30,32 being directed toward in the same direction it is different Sample is long.Following content is used to embody wording " different directions " and " same direction ": that is directed toward in the same direction at two is prominent Out in portion 30,32, two respectively from the imaginary of the sensor 12,14 on the end that load-bearing part 24 extends to protruding portion 30,32 Vector is parallel to each other or at least substantially parallel to only pressing from both sides into a small angle (10 ° of <) each other and anyway.Two In a protruding portion 30,32 being directed toward in different directions, two ends extended to from load-bearing part 24 respectively in protruding portion 30,32 On the imaginary vector of sensor 12,14 be antiparallel each other or at least substantially antiparallel each other and anyway Only press from both sides into a small angle (10 ° of <).When one or two protruding portions 30,32 of protruding portion 30,32 should extend into it is non-straight When in pipeline section 26,28, protruding portion 30,32 be not just parallel or antiparallel orientation may be reasonable.

By making protruding portion 30,32 different length and/or being in different directions directed toward, produce needed for propagation time measurement Separately below in order to distinguish and spacing referred to as between first sensor 12 and the sensor of second sensor 14 12,14. 20 one side of flow measurement device proposed by herein does not need measurement pipe, and does not on the other hand need the parameter expended yet Change, because the corresponding spacing between sensor 12,14 is known.

A kind of embodiment of flow measurement device 20 is shown in the diagram of Fig. 4, there are two refer to band in the same direction To and different length, perpendicular to or be at least substantially orthogonal to the protruding portion of the planar orientation limited by load-bearing part 24 30,32.Two sensors 12,13 of flow measurement device 20 are preferably directed to ultrasonic sensor and based on this embodiments (but not abandoning extensive generality) continues the following description.Or when mentioning ultrasonic sensor 12,14 each time It also contemplated the sensor in the frequency ranges of operation for being different from ultrasonic wave.

Position restriction of the sensor 12,14 on the end of protruding portion 30,32 one signal path (Signalweg) 34.This signal path is separately shown again below the diagram of flow measurement device 20.It follows that signal path 34 wraps Include the parallel component 36 of the component 3 6(for the plane for being parallel to load-bearing part 24) and it is vertical perpendicular to the component 3 8(of the plane of load-bearing part 24 Straight component 3 8).Importantly, component 38 is perpendicular to the plane limited by load-bearing part 24.Suggest being mounted on for type herein In flow measurement device 20 on pipeline section 26,28, this component 38 is directed toward along the flow direction for the medium for flowing through pipeline section 26,28. This component 38 thus define the measuring section d mentioned in the diagram of explanatory diagram 1 to Fig. 3 and measuring section d also correspondingly It is drawn in Fig. 4.

In one kind with the protruding portion 30,32 being directed toward in different directions from load-bearing part 24 of flow measurement device 20 It has equally been obtained obviously, based on then generated signal path 34 transverse to load-bearing part 24 in unshowned embodiment Plane and the component 38 that measuring section d has been determined along the flow direction of corresponding medium.

A kind of specific implementation for diagrammatically showing the flow measurement device 20 by Fig. 4 in Fig. 5.This flow is surveyed Amount device 20 does not need measurement pipe and does not need the parametrization expended.It include two protruding portions 30,32 i.e. a pair with press Fig. 4 It include two pairs of protruding portions 30,32 by the flow measurement device 20 of Fig. 5 unlike the flow measurement device 20 of protruding portion 30,32； 30a,32a.Respectively there is sensor 12,14 to be in each protruding portion 30,32；On the end of 30a, 32a.It is surveyed by the flow of Fig. 5 Device 20 is measured therefore in addition to two pairs of protruding portions 30,32；Also there are two pairs of matched sensors 12,14 outside 30a, 32a；12a,14a. Ultrasonic wave is in sensor 12,14；Trend between 12a, 14a shows (the first signal path 34 with double-head arrow respectively；Second signal Path 34a).

In the protruding portion 30,32 being directed toward in the same direction；In 30a, 32a, ultrasonic wave at least on specific time point Two sensors to one of in from the first sensor 12s on the end for being in long protruding portion 30 and by being in correlation Short protruding portion 32 end on second sensor 14 receive.In another sensor pair, ultrasonic wave is correspondingly from Second sensor 14a on the end of short protruding portion 32a sets out and the end of the protruding portion 30a by being in relevant length On first sensor 12a receive.In the protruding portion 30,32 being directed toward in different directions；It is correspondingly also this in 30a, 32a Sample.Replace long and short protruding portion 30,32；30a, 32a be the protruding portion that occurs being directed toward in the same direction respectively to 30, 32；30a,32a.Two protruding portions are to 30,32；30a, 32a are directed toward in opposite direction.

By Fig. 5 embodiment the advantages of be, while by sensor to 12,14 with corresponding medium flow direction It issues ultrasonic wave and ultrasonic wave is issued against the flow direction of medium to 12a, 14a by another sensor.By Fig. 4's In embodiment, ultrasonic wave is first alternately issued by first sensor 12 to 12,14 with only one sensor, the ultrasonic wave is by the Two sensors 14 receive, and and then issue ultrasonic wave by received second sensor 14 before, and the ultrasonic wave is then by it The first sensor 12 of preceding transmission receives.The ultrasonic wave generated respectively also and then is once issued with the flow direction of the medium of flowing And the flow direction of the medium of a reverse flow issues.Having flow measurement device of the only one sensor to 12,14 In 20 (Fig. 4), it is necessary to a complete circulation be waited (to be sent, used with first sensor 12 to obtain a flow measurement Second sensor 14 receives；It is sent with second sensor 14, is received with first sensor 12).Match in pairs with two pairs of difference The sensor 12,14 of set；In the flow measurement device 20 of 12a, 14a, once two sensors 12 to work as receiver, 14；12a, 14a receive the ultrasonic wave accordingly issued, just can find out flow measurement.

By Fig. 5 embodiment in, the direction of the ultrasonic wave issued respectively do not need yet it is enduringly constant, by band There are two sensors to 12,14；In the embodiment of 12a, 14a, by the direction of the ultrasonic wave issued respectively also with previously given Or can previously given periodical switching, can to avoid or at least reduce due to the vortex or the like in the medium of flowing Caused measurement error.

It is also contemplated that the flow measurement device 20 of at least one sensor 12,14 is had, at least one described biography Sensor simultaneously or alternately emits in both directions and receives from both direction, thus can replace and sense with a total of four Device 12,14；Two sensors of 12a, 14a also build a kind of flow measurement device 20 of band there are three sensor over the ground, and three Having one in sensor is this sensor.But this sensor be only finally it is that two difference issue in one direction and from The combination of the received sensor in this direction, thus this sensor be also understood as be on this position two individually Sensor 12,14；12a,14a.

Although explaining and describing the present invention in detail by embodiment, it is public that the present invention is not exposed to one or more institutes The exemplary limitation opened and other variant schemes can be thus derived by those skilled in the art, without departing from this hair Bright protection scope.

Some critically important aspects of the specification herein proposed it is possible thereby to be summarized as follows briefly: be proposed at this Innovation is a kind of sensor 12,14 for being separated from each other arrangement at least two；The flow measurement device 20 of 12a, 14a, it is no Then it does not include often required measurement pipe.The sensor 12,14 of the flow measurement device 20；12a, 14a be in respectively from Provide the protruding portion 30,32 that the load-bearing part 24 of the annular for being mounted on the flange face of tube section sets out；The freedom of 30a, 32a End on.Sensor 12,14；12a, 14a are preferably directed to ultrasonic sensor 12,14；12a,14a.Protruding portion 30,32； 30a, 32a perpendicular to or be at least substantially orthogonal to the planar orientation limited by load-bearing part 24.Each two sensors 12,14； 12a, 14a, that is, first sensor 12,12a, second sensor 14,14a are defined for being issued by first sensor 12,12a And by second sensor 14,14a received signal (or in turn), particularly ultrasonic signal signal path 34, 34a.The signal path 34,34a include the component 38 perpendicular to the plane limited by load-bearing part 24.Be mounted on pipeline section 26, In state on 28, this component 38 is parallel to the flow direction for flowing through the medium of pipeline section 26,28, thus fills by flow measurement Setting 20 can find out by least two sensors 12,14；12a, 14a reverse flow direction and the signal issued with flow direction Propagation time difference, for determining the flowing velocity of medium.

Reference signs list

10 pipelines

12,12a sensor

14,14a sensor

20 flow measurement devices

22 assessment devices

24 load-bearing parts

26 pipeline sections

28 pipeline sections

30,30a protruding portion

32,32a protruding portion

34,34a signal path

36 parallel components

38 vertical components

A pipe axis, pipeline axis, the axis of symmetry

D measuring section

RE tube end