CA2252724A1 - Device to detect the speed profile of concrete flowing into a pipeline - Google Patents
Device to detect the speed profile of concrete flowing into a pipeline Download PDFInfo
- Publication number
- CA2252724A1 CA2252724A1 CA002252724A CA2252724A CA2252724A1 CA 2252724 A1 CA2252724 A1 CA 2252724A1 CA 002252724 A CA002252724 A CA 002252724A CA 2252724 A CA2252724 A CA 2252724A CA 2252724 A1 CA2252724 A1 CA 2252724A1
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- Prior art keywords
- concrete
- pipeline
- speed
- probe means
- ray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000523 sample Substances 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 claims abstract description 5
- 238000004458 analytical method Methods 0.000 claims abstract description 3
- 238000001033 granulometry Methods 0.000 claims description 3
- 238000007619 statistical method Methods 0.000 claims description 3
- 238000001739 density measurement Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 description 2
- ZAKOWWREFLAJOT-CEFNRUSXSA-N D-alpha-tocopherylacetate Chemical compound CC(=O)OC1=C(C)C(C)=C2O[C@@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C ZAKOWWREFLAJOT-CEFNRUSXSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/221—Arrangements for directing or focusing the acoustical waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/011—Velocity or travel time
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/024—Mixtures
- G01N2291/02416—Solids in liquids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/102—Number of transducers one emitter, one receiver
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
A device to detect the speed profile of concrete flowing through a pipeline with radial symmetry comprises acoustical probe means, apt to send through said pipeline and the concrete a supersonic ray inclined in respect of the pipeline axis and to receive a disturbed supersonic ray in response, as well as an electronic circuit apt to analyse the signals sent by said probe means and obtain therefrom a diagram showing the speed profile of the concrete. According to the invention, said probe means make use of a supersonic ray of frequency between 20 and 500 KHz, and said electronic circuit processes the signals sent by the probe means, indicating the speed, with an updating frequency from 10 to 70 times per second and deprives said signals from their components derived from the propagation rate in the concrete, to obtain a measurement of the speed along the acoustical axis, which is not relative and has its own sign.
Description
CA 022~2724 1998-10-23 W O 97t40372 PCT~Er97/02071 "DEVICE TO DETECT THE SPEED PROFILE OF CONCRETE FLOWI~-G INTO A PIPELINE"
===oOo===
The present invention concerns a device to detect the speed profile of concrete inside a pipeline with radial symmetry throu~h which said concrete is caused to flow.
There are already known to be processes and de~ices to detect the speed profile of heterogeneous fluid mixtures flowing through ducts. Such processes and devices have generally been developed in the medical and biological field, for organic and/or physiological liquids of limited density and low viscosity - as, for ~x. .~le, blood - the dishomogeneities of which have dimensions of several magnitude orders below the size of the ducts through which they flow. which are of small or very small ~i~ncions.
Whereas, the problem had never been faced to detect the speed pro-file of fluids having a high density and a very high viscosity, such as concrete, the dishomogeneities of which have ~i m~nci ons of the same mag-nitude order as those of the ducts - always pipelines of wide diameter -through which they flow.
The present invention faces and solves this problem by supplying a device to detect the speed profile of concrete inside a pipeline with ra-dial symmetry, through which the concrete is caused to flow. Said device - of the type comprising acoustical probe means, apt to send through said pipeline, and the concrete flowing therein, a supersonic ray inclined in respect of the pipeline axis, and to receive a disturbed supersonic ray in response, as well as an electronic circuit, apt to analyse the 5ignAl~
sent by said probe means and obtain therefrom a diagram showing the speed profile of the concrete - is characterized in that, said probe means make use of a supersonic ray of frequency between 20 and 500 KHz, and in that said electronic circuit processes the ~ienAl .~ sent by the probe means.
indicating the speed, with an updating frequency from 10 to 70 times per second, and deprives said signals from their components derived from the propagation rate in the concrete, to obtain a measurement of the speed ~ . .
CA 022~2724 1998-10-23 W 097/40372 PCTnEP97/02071 along the acoustical axis, which is not relative and has its own sign.
Said detection device allows to display said speed measurements as a speed profile. Moreover, it allows measuring the flow rate as a speed integral on the section area, and it also allows viscosity measurements as first derivatives of the speed in the space, as well as granulometry and density measurements through a statistical analysis of a packet of speed profiles.
For econ~m;cal reasons and to simplify construction and operation it is usuaiiy convenient to adopt, in the detection device according to the invention, probe means wherein the transmitting and receiving probes coincide. Suitably, such probe means shall be applied on said pipeline so that the supersonic ray, of which use is made, is inclined by 15~ to 75~
in respect of the pipeline axis.
The invention will now be described in further detail with referen-ce to the accompanying drawings, which illustrate a preferred embodiment of the detection device defined heretofore, and in which:
Fig. 1 represents a block diagram of the detection device according to the invention;
Figs. 2 and 2A are diagrams illustrating, in two orthogonal sections. the application of the acoustical probe, forming part of the detection device of fig. 1, to a pipeline for concrete distribution;
Fig. 3 illustrates the propagation, in said pipeline of the super-sonic ray emitted by said probe into the various concrete components crossed by said ray; and Fig. 4 represents an example of speed profile of the concrete caused to flow into a distribution pipeline, such as it is displayed in the detection device according to the invention.
With reference to the drawings, the detection device according to the invention is of the type making use of a supersonic ray r (figs. I
and 2), of frequency between 20 and 500 KHz, sent across the concrete flowing through a pipeline C; said device operates by detecting the disturbance appearing on the ray r' of response (figs. 1 and 2A)~ in . . . ~ I
CA 022~2724 1998-10-23 W O 97/40372 P~ 157/02071 function of the irregularities deriving from the heterogeneous composi-tion of the concrete, which influence the propagation of said ray r'.
The detection device is applied on the pipeline C so that the su-personic ray, of which use is made, is inclined by 15~ to 75~ in respect of the axis of said pipeline (fig. 2).
As shown in fig. 1, said device consists of a transmitting probe 1, which sends the supersonic ray r suitably inclined towards the p~peline C
through which the concrete flows, so as to cross this latter and be dis-turbed and propagated thereby, of a receiving probe 2, which collects the disturbed ray r emerging from the pipeline C, and of a reception circuit to which are fed signals produced by the receiving probe 2. The receiving probe 2 is positioned on the same plane as the transmitting probe 1, for-ming any angle ~ therewith (see fig. 2A), and it may also coincide - it is preferably caused to coincide (as shown in fig. 2), with advantages as far as costs and simplicity of the device - with the transmitting probe.
In the reception circuit, the .ciEnAls sent by the receiving probe 2 are amplified by a logarithmic amplifier 3, with a gain which varies according to time, that is, to the distances of the propagation points from which the sianAl.s are issued.
The amplified c;EnAls are sent to a wattless decomposition circuit 4: this is a simple circuit (preferably, a very cheap RC unit) which re-covers the real part and the im~ginAry part of the siOnals, sending them separately to the shunting circuits S and 6, which are controlled by a sAmrl;ng circuit 7. In the shunting circuits S and 6 (preferably, two simple and economic digital shunts) the real and imaginary parts of the signals are shunted. The shunting time base of the shunts ~ and 6 is chosen so that, to each instant there corresponds a position in space of the echo-signal advancing in the pipeline C: one thereby anal~-ses, so as to be able to obtain the desired profile, the concrete mass moving into the pipeline C, section by section, along the axis of the supersonic ray and at preset distAnc~S from the .cAm~rling interval. Fig. 2 illustrates, by way of ~xAmrl~, a series of sections s.
CA 022~2724 1998-10-23 W 097/40372 PCT~EP97tO2071 -The signal issued by the shunting circuit 5 is multiplied by the signal issued by the shunting circuit 6 and is sent to the correlator 9, while the signal issued by the shunting circuit 6 is chan~ed of sign, is multiplied by the signal issued by the shunting circuit 5 and is then sent to the correlator 8. The correlators 8 and 9 are controlled by the ~Amrlin~ circuit 7. In said circuits, the real and imaginary parts of the si gn~ of each section are correlated so that it may be possible to recover the speed, alon~ the axis of the supersonic ray, of the particles in each section. By identifying the walls of the pipeline as the sections which, by definition, are speedless, it is possible to render the measu-rement independent from the speed of propagation in the concrete (the particular concrete in the special conditions in which it is while flow-ing into the pipeline C) and from the refraction angle of the supersonic ray in the pipeline wall-concrete passage (see fig. ~!. and to obtain an absolute measu~ ..E (and not a relative one, as it happened in the known detection devices used in the medical and biological field) of the speed in each section (each measulc - ~ with its own sign). The processing should occur with an updating frequency by the sampling circuit 7 of at least 10 to 70 times per second, taking into account the characteristics of very high dishomogeneity of the concrete, and the fact that concrete is usually distributed with an alternative pump, with consequent irregu-larities in its feeding motion.
In the correlation circuits a mean operation is thus carried out, allowing to clear from the noise the single .~;enAl.~ before .C~n~ing them to the processor 10 of the reception circuit.
Said processor then joins again the real and i~ginAry parts of the signals, performin~ also a filtering operation, and it provides to draw from the speed values (each with its own sign) the desired profile, which is thus evidenced onto a display, as illustrated by way of example in fig. 4 (where v indicates the speed - ordinates - and d represents -AhsÇics~ - the diamater of the pipeline C, through which the concrete is caused to flow).
, .. _ .. ... .
CA 022~2724 1998-10-23 Once having recovered the speed values in each section, with the same processor 10 it is also possible to determine. through ordinary electronic computation processes, the flow rate (as speed integral on the section area), the viscosity (as derivative of the speed in the space), and the granulometry (by a statistical analysis of a packet of speed profiles) of the concrete flowin~ into the pipeline C.
The possibility to determine all these physical quantities finally allows to guarantee a certification to the concrete fed through a pipe-line C equipped with the detection device of the present invention.
. ~
===oOo===
The present invention concerns a device to detect the speed profile of concrete inside a pipeline with radial symmetry throu~h which said concrete is caused to flow.
There are already known to be processes and de~ices to detect the speed profile of heterogeneous fluid mixtures flowing through ducts. Such processes and devices have generally been developed in the medical and biological field, for organic and/or physiological liquids of limited density and low viscosity - as, for ~x. .~le, blood - the dishomogeneities of which have dimensions of several magnitude orders below the size of the ducts through which they flow. which are of small or very small ~i~ncions.
Whereas, the problem had never been faced to detect the speed pro-file of fluids having a high density and a very high viscosity, such as concrete, the dishomogeneities of which have ~i m~nci ons of the same mag-nitude order as those of the ducts - always pipelines of wide diameter -through which they flow.
The present invention faces and solves this problem by supplying a device to detect the speed profile of concrete inside a pipeline with ra-dial symmetry, through which the concrete is caused to flow. Said device - of the type comprising acoustical probe means, apt to send through said pipeline, and the concrete flowing therein, a supersonic ray inclined in respect of the pipeline axis, and to receive a disturbed supersonic ray in response, as well as an electronic circuit, apt to analyse the 5ignAl~
sent by said probe means and obtain therefrom a diagram showing the speed profile of the concrete - is characterized in that, said probe means make use of a supersonic ray of frequency between 20 and 500 KHz, and in that said electronic circuit processes the ~ienAl .~ sent by the probe means.
indicating the speed, with an updating frequency from 10 to 70 times per second, and deprives said signals from their components derived from the propagation rate in the concrete, to obtain a measurement of the speed ~ . .
CA 022~2724 1998-10-23 W 097/40372 PCTnEP97/02071 along the acoustical axis, which is not relative and has its own sign.
Said detection device allows to display said speed measurements as a speed profile. Moreover, it allows measuring the flow rate as a speed integral on the section area, and it also allows viscosity measurements as first derivatives of the speed in the space, as well as granulometry and density measurements through a statistical analysis of a packet of speed profiles.
For econ~m;cal reasons and to simplify construction and operation it is usuaiiy convenient to adopt, in the detection device according to the invention, probe means wherein the transmitting and receiving probes coincide. Suitably, such probe means shall be applied on said pipeline so that the supersonic ray, of which use is made, is inclined by 15~ to 75~
in respect of the pipeline axis.
The invention will now be described in further detail with referen-ce to the accompanying drawings, which illustrate a preferred embodiment of the detection device defined heretofore, and in which:
Fig. 1 represents a block diagram of the detection device according to the invention;
Figs. 2 and 2A are diagrams illustrating, in two orthogonal sections. the application of the acoustical probe, forming part of the detection device of fig. 1, to a pipeline for concrete distribution;
Fig. 3 illustrates the propagation, in said pipeline of the super-sonic ray emitted by said probe into the various concrete components crossed by said ray; and Fig. 4 represents an example of speed profile of the concrete caused to flow into a distribution pipeline, such as it is displayed in the detection device according to the invention.
With reference to the drawings, the detection device according to the invention is of the type making use of a supersonic ray r (figs. I
and 2), of frequency between 20 and 500 KHz, sent across the concrete flowing through a pipeline C; said device operates by detecting the disturbance appearing on the ray r' of response (figs. 1 and 2A)~ in . . . ~ I
CA 022~2724 1998-10-23 W O 97/40372 P~ 157/02071 function of the irregularities deriving from the heterogeneous composi-tion of the concrete, which influence the propagation of said ray r'.
The detection device is applied on the pipeline C so that the su-personic ray, of which use is made, is inclined by 15~ to 75~ in respect of the axis of said pipeline (fig. 2).
As shown in fig. 1, said device consists of a transmitting probe 1, which sends the supersonic ray r suitably inclined towards the p~peline C
through which the concrete flows, so as to cross this latter and be dis-turbed and propagated thereby, of a receiving probe 2, which collects the disturbed ray r emerging from the pipeline C, and of a reception circuit to which are fed signals produced by the receiving probe 2. The receiving probe 2 is positioned on the same plane as the transmitting probe 1, for-ming any angle ~ therewith (see fig. 2A), and it may also coincide - it is preferably caused to coincide (as shown in fig. 2), with advantages as far as costs and simplicity of the device - with the transmitting probe.
In the reception circuit, the .ciEnAls sent by the receiving probe 2 are amplified by a logarithmic amplifier 3, with a gain which varies according to time, that is, to the distances of the propagation points from which the sianAl.s are issued.
The amplified c;EnAls are sent to a wattless decomposition circuit 4: this is a simple circuit (preferably, a very cheap RC unit) which re-covers the real part and the im~ginAry part of the siOnals, sending them separately to the shunting circuits S and 6, which are controlled by a sAmrl;ng circuit 7. In the shunting circuits S and 6 (preferably, two simple and economic digital shunts) the real and imaginary parts of the signals are shunted. The shunting time base of the shunts ~ and 6 is chosen so that, to each instant there corresponds a position in space of the echo-signal advancing in the pipeline C: one thereby anal~-ses, so as to be able to obtain the desired profile, the concrete mass moving into the pipeline C, section by section, along the axis of the supersonic ray and at preset distAnc~S from the .cAm~rling interval. Fig. 2 illustrates, by way of ~xAmrl~, a series of sections s.
CA 022~2724 1998-10-23 W 097/40372 PCT~EP97tO2071 -The signal issued by the shunting circuit 5 is multiplied by the signal issued by the shunting circuit 6 and is sent to the correlator 9, while the signal issued by the shunting circuit 6 is chan~ed of sign, is multiplied by the signal issued by the shunting circuit 5 and is then sent to the correlator 8. The correlators 8 and 9 are controlled by the ~Amrlin~ circuit 7. In said circuits, the real and imaginary parts of the si gn~ of each section are correlated so that it may be possible to recover the speed, alon~ the axis of the supersonic ray, of the particles in each section. By identifying the walls of the pipeline as the sections which, by definition, are speedless, it is possible to render the measu-rement independent from the speed of propagation in the concrete (the particular concrete in the special conditions in which it is while flow-ing into the pipeline C) and from the refraction angle of the supersonic ray in the pipeline wall-concrete passage (see fig. ~!. and to obtain an absolute measu~ ..E (and not a relative one, as it happened in the known detection devices used in the medical and biological field) of the speed in each section (each measulc - ~ with its own sign). The processing should occur with an updating frequency by the sampling circuit 7 of at least 10 to 70 times per second, taking into account the characteristics of very high dishomogeneity of the concrete, and the fact that concrete is usually distributed with an alternative pump, with consequent irregu-larities in its feeding motion.
In the correlation circuits a mean operation is thus carried out, allowing to clear from the noise the single .~;enAl.~ before .C~n~ing them to the processor 10 of the reception circuit.
Said processor then joins again the real and i~ginAry parts of the signals, performin~ also a filtering operation, and it provides to draw from the speed values (each with its own sign) the desired profile, which is thus evidenced onto a display, as illustrated by way of example in fig. 4 (where v indicates the speed - ordinates - and d represents -AhsÇics~ - the diamater of the pipeline C, through which the concrete is caused to flow).
, .. _ .. ... .
CA 022~2724 1998-10-23 Once having recovered the speed values in each section, with the same processor 10 it is also possible to determine. through ordinary electronic computation processes, the flow rate (as speed integral on the section area), the viscosity (as derivative of the speed in the space), and the granulometry (by a statistical analysis of a packet of speed profiles) of the concrete flowin~ into the pipeline C.
The possibility to determine all these physical quantities finally allows to guarantee a certification to the concrete fed through a pipe-line C equipped with the detection device of the present invention.
. ~
Claims (8)
1) Device to detect the speed profile of concrete inside a pipeline with radial symmetry through which the concrete is caused to flow - of the type comprising acoustical probe means, apt to send through said pipeline. and the concrete flowing therein. a supersonic ray inclined in respect of the pipeline axis, and to receive a disturbed supersonic ray in response, as well as an electronic circuit, apt to analyse the signals sent by said probe means and obtain therefrom a diagram showing the speed profile of the concrete - characterized in that, said probe means make use of a supersonic ray of frequency between 20 and 500 KHz, and in that said electronic circuit processes the signals sent by the probe means, indicating the speed, with an updating frequency from 10 to 70 times per second, and deprives said signals from their components derived from the propagation rate in the concrete, to obtain a measurement of the speed along the acoustical axis, which is not relative and has its own sign.
2) Device as in claim 1), wherein said speed measurements are displayed as a speed profile.
3) Device as in claims 1) and 2), wherein the flow rate is measured as a speed integral on the section area.
4) Device as in claims 1) to 3), wherein viscosity measurements are obtained as first derivatives of the speed in the space.
5) Device as in claims 1) to 4), wherein granulometry and density measurements are obtained through a statistical analysis of a packet of speed profiles.
6) Device as in claims 1) to 5), wherein probe means are adopted.
in which the transmitting and receiving probes coincide.
in which the transmitting and receiving probes coincide.
7) Device as in claims 1) to 6), wherein said probe means are applied on said pipeline so that the supersonic ray, of which use is made.
is inclined by 15° to 75° in respect of the pipeline axis.
is inclined by 15° to 75° in respect of the pipeline axis.
8) Device as in claims 1) to 7), wherein a certification of the concrete fed through said pipeline is obtained.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI96A000812 | 1996-04-24 | ||
| IT96MI000812A IT1282125B1 (en) | 1996-04-24 | 1996-04-24 | DEVICE FOR DETECTION OF THE SPEED PROFILE OF CONCRETE MOVING IN A DUCT. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2252724A1 true CA2252724A1 (en) | 1997-10-30 |
Family
ID=11374110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002252724A Abandoned CA2252724A1 (en) | 1996-04-24 | 1997-04-23 | Device to detect the speed profile of concrete flowing into a pipeline |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0900373A1 (en) |
| JP (1) | JP2001515586A (en) |
| KR (1) | KR20000010637A (en) |
| CN (1) | CN1219237A (en) |
| AU (1) | AU712742B2 (en) |
| BR (1) | BR9708741A (en) |
| CA (1) | CA2252724A1 (en) |
| IT (1) | IT1282125B1 (en) |
| NO (1) | NO984954L (en) |
| NZ (1) | NZ332504A (en) |
| TR (1) | TR199802142T2 (en) |
| WO (1) | WO1997040372A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323323B (en) * | 2013-05-21 | 2015-05-20 | 河海大学 | Establishing method of concrete breaking strength prediction model considering loading rate influence |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2647184C3 (en) * | 1976-10-19 | 1982-03-25 | Nikolaj Ivanovič Moskva Brašnikov | Method for determining physical parameters of liquid media by means of ultrasound |
| CH669463A5 (en) * | 1985-03-21 | 1989-03-15 | Walter Guggenbuehl Prof Dr | Gas flow and temp. measuring device - uses ultrasonic pulses transmitted simultaneously in opposite directions at angle to gas flow |
| FR2634557A1 (en) * | 1988-07-22 | 1990-01-26 | Pluss Stauffer Ag | DEVICE AND METHOD FOR SIMULTANEOUSLY MEASURING IN A CONDUIT, DENSITY, CONCENTRATION, FLOW SPEED, FLOW AND TEMPERATURE OF A LIQUID OR PASTY FLUID BY ULTRASONIC TRANSMISSION |
-
1996
- 1996-04-24 IT IT96MI000812A patent/IT1282125B1/en active IP Right Grant
-
1997
- 1997-04-23 TR TR1998/02142T patent/TR199802142T2/en unknown
- 1997-04-23 KR KR1019980708559A patent/KR20000010637A/en not_active Application Discontinuation
- 1997-04-23 NZ NZ332504A patent/NZ332504A/en unknown
- 1997-04-23 EP EP97921721A patent/EP0900373A1/en not_active Withdrawn
- 1997-04-23 AU AU27690/97A patent/AU712742B2/en not_active Ceased
- 1997-04-23 WO PCT/EP1997/002071 patent/WO1997040372A1/en not_active Application Discontinuation
- 1997-04-23 JP JP53775297A patent/JP2001515586A/en active Pending
- 1997-04-23 BR BR9708741-6A patent/BR9708741A/en not_active Application Discontinuation
- 1997-04-23 CN CN97194823A patent/CN1219237A/en active Pending
- 1997-04-23 CA CA002252724A patent/CA2252724A1/en not_active Abandoned
-
1998
- 1998-10-23 NO NO984954A patent/NO984954L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NO984954D0 (en) | 1998-10-23 |
| KR20000010637A (en) | 2000-02-25 |
| NZ332504A (en) | 2000-04-28 |
| NO984954L (en) | 1998-12-11 |
| WO1997040372A1 (en) | 1997-10-30 |
| ITMI960812A0 (en) | 1996-04-24 |
| AU2769097A (en) | 1997-11-12 |
| TR199802142T2 (en) | 1999-02-22 |
| AU712742B2 (en) | 1999-11-18 |
| JP2001515586A (en) | 2001-09-18 |
| ITMI960812A1 (en) | 1997-10-24 |
| BR9708741A (en) | 2000-01-04 |
| EP0900373A1 (en) | 1999-03-10 |
| IT1282125B1 (en) | 1998-03-12 |
| CN1219237A (en) | 1999-06-09 |
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