AU2002360901B2 - Microwave measuring device for detecting the charge of two-phase flow - Google Patents
Microwave measuring device for detecting the charge of two-phase flow Download PDFInfo
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- AU2002360901B2 AU2002360901B2 AU2002360901A AU2002360901A AU2002360901B2 AU 2002360901 B2 AU2002360901 B2 AU 2002360901B2 AU 2002360901 A AU2002360901 A AU 2002360901A AU 2002360901 A AU2002360901 A AU 2002360901A AU 2002360901 B2 AU2002360901 B2 AU 2002360901B2
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- 230000005514 two-phase flow Effects 0.000 title abstract description 7
- 241001393742 Simian endogenous retrovirus Species 0.000 claims description 10
- 239000002245 particle Substances 0.000 abstract description 14
- 230000010287 polarization Effects 0.000 abstract description 13
- 239000007787 solid Substances 0.000 abstract description 13
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 9
- 239000003245 coal Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 7
- 239000004020 conductor Substances 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- 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
-
- 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
- G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Measuring Volume Flow (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Measuring Phase Differences (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention relates to a microwave measuring device for detecting the charge of a two-phase flow with a gaseous carrier medium containing small and minuscule solid and /or fluid particles and for detecting gas contained in a fluid flow, preferably by means of waveguide carrier waves. A preferred application of the invention is the detection of solid particles contained in the flow of gas of voluminous pneumatic solid matter transport systems used, for example, for pulverized coal furnaces of coal power stations. The inventive microwave measuring device is provided with field rods, which protrude into the inside of the feed pipe, are arranged before and after a measuring section formed by a transmission antenna and a reception antenna, said rods interacting with the feed pipe made of conductive material as a resonator for microwaves injected into the feed pipe via the transmission antenna, whereby microwaves that differ from the injected microwaves in their plane of polarization and/or phase as a result of diffraction, superposition, and/or reflection outside the measuring section are essentially short-circuited in order to prevent the results of the measurement from being distorted. The inventive device has the particular advantage of being simple to build and easy to install even in voluminous and branched feed pipe systems.
Description
23/87/2884 15:26 +613-9898-1337 PATENT ATTORNEY SERV PAGE 05/18 Microwave Measuring Device for Detecting the Charge of a Two-Phase Flow The invention relates to a microwave measuring device for defining the load of a two-phase flow comprising a gaseous carrier medium with small and minute solids particles and/or liquid particles as well as for defining the gas contained in a fluid flow. A preferred field of application of the invention relates to defining the load of a gaseous flow with solids particles in a largevolume pneumatic solids transport systems of the kind used, for instance, in pulverized coal furnaces of coal-fired power plants.
It is known to define the particle load of two-phase flows comprising a gaseous carrier medium as well as the proportion of gas contained in fluid flows, by means of microwaves. In a great many of the known systems of this kind, microwaves of a certain frequency arm coupled into a portion of a feed duct pr-pared as a measuring duct, and at the end of the duct any changes in amplitude and phase of the microwave is registered. A preferred method of operation involves a waveguide fundamental wave to avoid undue complications and interferences. The physical background of the measuring principle resides in the fact that a change in the load of the carrier gas with solids and/or liquids or a change of the proportion of gas in a fluid flow leads to a change in the complex dielectric constant in the feed duct and that microwaves suffer an attenuation and phase shift as a function of this dielectric constant. German laid-open patent specification 44 26 280 AI describes a method of determining the load of a gaseous flow with solids particles and, more particularly, fur controlling the firing with pulverized coal of a boiler in a coal-fired power plant, by determining the solids content of the gaseous flow as a function of the attenuation of electromagnetic waves along a measuring duct carrying the gaseous flow. As described in German patent 33 17 215 CI, the quantity of the particle load of exhaust gas is Similarly derive from the attenuation of microwaves during their passage through the particlebearing exhaust gas. A method is described in WO 91/05243 in which the content of oil or water in an oil-water mixture as well as the velocity thereof are determined by evaluating the 1 COMS ID No SBMI-00840615 Received by 1P Australia: Time (Hm) 15:39 Date 2004-07-23 23/87/2884 15:26 +613-9898-1337 PATENT ATTORNEY SERV PAGE-, 06/18 attenuation and phase shift of microwaves along a measuring duct. The methods described above are subject to significant problems because of the effect of interferences resulting from reflected micowaves or because of geometric changes in the feed duct system. With small loads in particular the microwave attenuation is so little that microwaves, like in a waveguide, are propagating over long distances and are reflected and/or diffracted at narrows, branches, cyves or ends. The result is heterodyning of waves propagating to and fro and, hence, measuring results difficult to evaluate or significant distortions in the evaluation.
To avoid the effect of such disturbances, systems have been developed which utilize geometrically defined microwave resonators. A device of this kind has been described in European published patent specification 0,669,522 A2 in which a powder-mass flow in a powdergas-mixture is mas-red while it is being fed through a feed duct. In this system, the microwave resonator is either mounted on the exterior of the feed duct or it circumscribes the feed duct in the manner of a cavity resonator. With the cavity resonator mounted exteriorly of the feed duct the measurement is taken of only a portion of the flow of the powder-gas-mixture. When, as is often the case in large volume feed ducts, different particle loads of the powder-gas-mixture occur over the cross-section of the feed duct, or when, sometimes, ropes of increased particle concentration have to be taken into consideration, the results of measurements derived from a cavity resonator mounted on the exterior of the feed duct may suffer from significant eonors. Such errors do not occur with a cavity resonator circumscribing a feed duct. However, such resonators entail significant structural complexities and in large-volume feed ducts they cannot usually be realized for reasons of lacking space. Hence, such an arrangement is limited in its application to areas in which relatively small feed cross-sections occur such, as, for instance, in power coating apparatus.
As a ftuther development of the system described in European published patent specification, German patent 196.50 112 Cl describes a microwave resonator which is characterised by 2 COMS ID No: SBMI-00840615 Received by IP Australia: Time 15:39 Date 2004-07-23 23/87/2004 15:26 +613-9890-1337 PATENT ATTORNEY SERV PAGE 07/18 relatively low structural complexity. In principle, the resonator consists of a cylindrical coil surrounding a non-conductive portion and shielded to the exterior by electrically conductive cylinder (helix resonator). The coil is caused to resonate by a high frequency alternating voltage (in the microwave range). By evaluating, as is well known, the shift in resonant frequency current, it is possible to define the powder mass flow. This arrangement, too, can either not be used in connection with large volume feed ducts which usually consist of an electrically conductive material (metal), or would entail significant structural complexity as a portion of the feed duct would have to be made of a non-conductive material. At the relevant structural sizes and resultant low resonant frequency the helix resonator consisting of the coil and the electrically conductive shield would be quite voluminous.
For defining the proportions of gas-oil-water-mixtures in transport pipe lines, U.S. patent 5,351,521 A describes a system for measuring large changes of the complex dielectric constant.
This is accomplish by a consecutive arrangement within the transport pipe line, of stepped continuous pipe sections of reducing diameter. Measuring electrodes are disposed within the pipe sections for measuring and evaluatin, in accordance with the reducing diameter of the pipe sections, different threshold frequencies and, hence, different frequency ranges of the input microwave. The pipe sections are supported by electrically conductive rods which extend in radial pattens between the outer wall of each pipe section to the inner wall of the transport pipe line. The described arrangement of the electrically conductive rods prevent the input microwaves from passing through the space between the inner wall of the transport pipe line and the outer wall of the pipe sections. The arrangement is characterised by a relatively large measuring range.
The attainable measuring accuracy is insufficient, however, for the prekrred application of defining the load in gaseous flow of solids particles in large volume pneumatic solids transport systems of the kind used, for instance, in pulverized coal fired systems of coal fired power plants.
Moreover, the necessary installations of the pipe sections into transport pipe lines arc complex and have a significant effect upon the flow conditions within the transport pipe line.
3 COMS ID No: SBMI-00840615 Received by IP Australia: Time 15:39 Date 2004-07-23 It is an object of the invention to provide a microwave measuring device for defining the load of a two phase flow with a gaseous carrier medium and small and minute solids and/or liquid particles as well as for defining the gas contained in a fluid flow which at a high measuring precision may be realized economically, is of broad applicability and is especially suited for application in large-volume feed ducts at low loads or at low load differences. A further object is to develop a microwave measuring device of comparatively simple structure, which may be incorporated in a simple manner into and in which the entire flow cross-section of the feed duct is always included in the measurement.
In accordance with the invention, the object is accomplished in a microwave mcasuring device for defining the load of a two phase flow with a gaseous carrier medium and small and minute solids particles and/or liquid particles as well as for defining the gas contained in a fluid flow, by the insertion into a feed duct section made of electrically conductive material in the longitudinal direction thereof ahead of and behind the measuring path defined by a transmission antenna for inputting microwaves into the feed duct and a receiving antenna for the reception of microwaves changed along the measuring path in frequency, amplitude and/or phase, of an electrically conductive rod (hereafter called '"field rod") such the feed duct section limited by the field rods in connection with the field rods acts as a resonator for input microwaves. The spacing between the field rods and, hence, the feed duct section limited by the field rods determines the resonant frequency of the resonator.
The field rods are to be placed approximately in the polarization plane of the input microwaves and approximately within the cross-sectional plane of the electrically conductive feed duct section, directed either similarly or opposite. They should be arranged such that they point approximately radially toward or intersect the center of the cross-sectional plane. The length of the field rods is to be such that they extend at least to the center of the cross-sectional plane or,
A
23/07/2004 15:26 +613-9890-1337 PATENT ATTORNEY SERV PAGE 09/18 advantageously, extend 2/3 through the cross-sectional plane.
For the function of the invention it is not necessary that the feed pipe section which in connection with the field rods acts as a microwave resonator be of circular cross-section. The cross-sectional surface may also be oval, square, rectangular ore polygonal. In the present context, the term imean diameterd is to be understood as referring to the average distance between to opposite wall surface elements of the feed duct.
Advantageously, with respect to the unambiguity of the measuring results as well as the attainable measuring accuracy the frequency of input microwaves should correspond to the fundamental wave of the waveguide.
Proceeding from the preferred use of the waveguide fundamental wave for defining the changes of the dielectric constant and, thus, to determining the load, the length of the measuring path between the transmission and receiving antennae should be such that it corresponds to .8 to 3 times, preferably 1.5 times the average diameter of the feed duct section. The field rods are thus to be aligned in the longitudinal direction of the feed duct ahead of the transmission and behind the receiving antenna. The electric system composed of the field rods and electrically conductive feed duct section then will act as a resonator for the fundamental wave of the waveguide.
Microwaves which have been altered by reflection, diffraction and heterodyning outside of the measuring section or, within the feed duct, in their plane of polarization and/or phase position and which may cause distortions of the measurement results, will be substantially short circuited by the field rods.
Excepted from this effect of the field rods are microwaves the electrical field strength of which equals zero at the position of the field rods. In order to prevent penetration of these microwaves COMS ID No: SBMI-00840615 Received by IP Australia: Time 15:39 Date 2004-07-23 23/07/2004 15:26 +613-9890-1337 PATENT ATTORNxEY SERV PAGE 10/18 into the section of the feed duct containing the measuring path and serving as a resonator for the input microwaves and cause distortions in the measuring results, it is efficacious to provide auxiliary field rods ahead of and behind the feed duct sections delimited by the field rods. The auxiliary field rods are directed equal or opposite to the field rods, i.e. they are also disposed in the plane of polarization of the input microwaves. Their distance from the field rods and from the resonator for input microwaves formed by the field rods and feed duct section is to be dimensioned such that microwaves the electrical field strength of which equals zero at the field rods, are short circuited outside of the resonator. A distance corresponding to 1/8 of the wave length of the resonant frequency of the resonator would be appropriate because microwaves of twice or tree times the frequency of the resonant frequency of the resonator are substantially short circuited, The length of the auxiliary field rods should correspond to the length of the field rods.
With the preferred use of the fundamental wave hollow wave guide for defining the load the auxiliary field rods should be arranged from the field rods at 7/8 of the distance of the average diameter of the feed duct section.
Furthermore and particularly in connection with a feed duct of symmetrical cross-section (circle, square, hekagon) it is advantageous to place an auxiliary field rod in the center of the measuring path, rotated 90( in the cross-sectional surface relative to the field rods and the plane of polarization. In that manner, the wavegulde characteristics of the measuring path are changed vertically of the plane of polarization of the input microwaves such that in the range of the resonant frequency of the resonator no resonance effects occur in consequence of microwaves rotated 90( in the polarization plane relative to the input microwaves.
In respect of the function of the invention it is not important that the feed duct section be straight relative to its longitudinal axis. The function of the microwave measuring device in accordance with the invention remains unchanged even with a feed duct section which is curved or bent 6 COMS ID No: SBMI-00840615 Received by IP Australia: Time 15:39 Date 2004-07-23 23/07/2004 15:26 +613-9890-1337 PATENT ATTORNE SERV PAGE 11/18 relative to its longitudinal axis.
Conceivably, and this constitutes one aspect of the invention, a plurality of field rods may be arranged, for instance in a grid pattern, in the respective cross-sectional surfaces, parlicularly in the case of very large feed duct czoss-sections. In an arrangement of a plurality of field rods within a cross-sectional they need not necessarily point to, or intersect, the center of the crosssectional surface. In such a case, the field rods should, however, be positioned in the polarization plane of the input microwaves.
A special advantage of the measuring device in accordance with the invention resides in its relatively simple and, therefore, cost-efficient construction. The construction is such that it may be adjusted to almost every size of fee duct The measuring device in accordance with the invention may also be integrated without any difficulties into feed duct under spatially difficult conditions. The inventors found the measurement results obtained with the measurng device in accordance with the invention and using a conventional method of microwave measuring to be surprisingly accurate.
The microwave measuring device in accordance with the invention will hereafter be explained in greater detail on the basis of *u embodiment. The accompanying drawing schematically depicts a section of a feed duct with a microwave measurement device in accordance with the invention.
The drawing depicts, in partial section, a section of a feed duct 1 for pn matically transporting pulverzed coal. The Feed duct 1 is of the kind typically used in pulverized coal-fired finaces of coal-fired power plants. The feed duct 1 consists of corrosion-resistant steel. It is of approximate circular cross-section with a diameter D 200 nun. From the exterior, and extending into the interior of the feed duct 1, there consecutively mounted, in the longitudinal direction of the feed duct 1, at a spacing of 300 mm and forming a measuring path S, a transmission antenna 2 and a 7 COMS ID No: SBMI-00840615 Received by IP Australia: Time 15:39 Date 2004-07-23 23/07/2804 15:26 +613-9890-1337 PATENT ATTORNEY SERV PAGE 12/18 receiving antenna 3. Microwaves at frequencies between 840 and 860 MHZ are coupled in by the transmission antenna 2. Those microwaves c-orrespond to the wavegaide fundamental wave of the feed duct 1. In the longitudinal direction of the feed duct 1, ahead of the transmission antenna 2 and behind the receiving antenna 3, there are provided field rods 4 and 5 extending radially into the interior of the feed duct 1, in the polarization plane of the input microwaves.
The field rods 4 and 5 are separated from each other by a distance Fa of 700 mm, and from the transmission antenna 2 and receiving antenna 3 they are each separated by a distance of 200 mm.
In the longitudinal direction of the feed duct 1 they are aligned with the transmission and receiving antennae 2, 3. Their length is 140 mm. The field rods 4, 5 consist of abrasion-resistant round steel of a diameter of 4 mm. The above-described system made up by the arrangement of field rods 4,5 in the section of the feed duct 1 functions as a resonator for microwaves of the waveguide fundamental wave. In this manner, those microwaves which were coupled into the feed duct I by the transmission antenna 2 and which outside of the measuring path S have suffered alterations in consequence of diffraction, reflection and/or heterodyning in their polarization plane and/or phase position will be short circuited, Le. they ar not transmitted to the receiving antenna 3 and cannot, therefore, affect the result of any measurement. However, reflected or heterodyned microwaves the electrical field strength of which at the position of the field rods equals zero, are not short circuited by the described measuring arrangement and can, therefore, distort the result of the measurement. In order to prevent this, auxiliary field rods 6, 7 radially extending into the interior of the feed duct section I are mounted ahead of and behind the feed duct section I delimited by the field rods 4, 5. The auxiliary field rods 6, 7 are also disposed in the polarization plane of the input microwaves. In the longitudinal direction of the feed duct 1, the auxiliary field rods 6, 7 are respectively separated from the field rods 4, 5 by spacings Fb, Fe of 175 mm. Their length, like that of the field rods 4, 5, is 140 mm. Moreover, in the longitudinal direction, approximately in the center of the measuring path S, there is provided an auxiliary field rod 8 within the cross-sectional plane and rotated 90#.,lafive to the field rods and, hence, to the polarization plane of the input microwaves. The purpose of the auxiliary field rod 8 8 COMS ID No: SBMI-00840615 Received by IP Australia: Time 15:39 Date 2004-07-23 23/07/2004 15:26 +613-9890-1337 PATENT ATTORNEYV SERV PAGE 13/18 is to prevent resonant effects of reflected microwaves rotated in the polarization plane by relative to the field rods 4, 5, within the resonator formed by the field rods 4, 5 and the feed duct section 1.
9 COMS ID No: SBMI-00840615 Received by IP Australia: Time 15:39 Date 2004-07-23
Claims (10)
- 2. The microwave measuring device in accordance with claim 1, characterised by the fact that, the field rods are disposed approximately within the cross-sectional surface of the feed duct section (Fa) and are disposed identically or oppositely.
- 3. The microwave measuring device in accordance with claim 1 or 2, characterised by the fact, that are arranged to point approximately to the center of the cross- sectional surface of the feed duct section (Fa) or to intersect it.
- 4. The microwave measuring device in accordance with one of the predicting claims, characterised by the fact that the field rods extending into the interior of the feed duct extend over at least half and preferably more than two-thirds across the cross-sectional surface of the feed duct section (Fa). 23/07/2004 15:26 +613-9890-1337 PATENT TTOFUE SERV PAGE 15/18 The microwave measuring device in accordance with one of the preceding claims, characterised by the fact that auxiliary field rods ar arranged ahead of and behind the feed duct section (Fa) limited by the field rods
- 6. The microwave measuring device in accordance with claim 5, characterised by the fact that the auxiliary field rods are arranged parallel to the field rods and in the direction thereof, or opposite thereto.
- 7. The microwave measuring device in accordance with claim 5 or 6, characterised by the fact that the auxiliary field rods are arranged relative to the field rods at a distance (Fb,Fc) of about one eighth of the wavelength of the resonance frequency of the resonator (formed by the field rods and the feed duct section (Fa).
- 8. The microwave measuring device in accordance with one of claims 5 to 7, characterised by the fact that the length of the auxiliary field rods corresponds to the length of the field rods
- 9. The microwave measuring device in accordance with one of the preceding claims, characterised by the fact that approximately in the middle between transmitting and receiving antenna an auxiliary field rod: is arranged in the cross-sectional surface of the feed duct section rotated about 90 elative to the field rods The microwave measuring device in accordance with one of the preceding claims, characterised by the fact that instead of one field rod in the given cross-sectional surface of the feed duct section (Fa) two or more field rods are arranged parallel to each other. II COMS ID No: SBMI-00840615 Received by IP Australia: Time 15:39 Date 2004-07-23 23/07/2084 15:26 +613-9890-1337 PATENT ATTORNEY SERV PAGE 16/18
- 11. The microwave measuring device in accordance with claim 1, charactised by the fact that the measuring path disposed between transmitting and receiving antenna (2,3) corresponds to .8 to 3 times, preferably 1.5 times, the mean diameter of the feed duct section (Fa).
- 12. The microwave measuring device according to claim 11, characterised by the fact that the given distance (AB) between field rod and ransmitting antenna or receiving antenna (3) and field rod corresponds to about the mean diameter of the feed duct setion (Fa).
- 13. The microwave measuring device according to claim 5 and II or 12 for defining the load by means of a waveguide fundamental wave, characterised by the fact that the distance (Fb,Fc) between the auxiliary field rods and the field rods corresponds to the mean diameter of the feed duct section (Fa). 12 COMS ID No: SBMI-00840615 Received by IP Australia: Time (Hnm) 15:39 Date 2004-07-23
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10164107A DE10164107C1 (en) | 2001-12-24 | 2001-12-24 | Microwave measuring device for determining the loading of a two-phase flow |
| DE10164107.9 | 2001-12-24 | ||
| PCT/DE2002/004593 WO2003056316A1 (en) | 2001-12-24 | 2002-12-18 | Microwave measuring device for detecting the charge of a two-phase flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2002360901A1 AU2002360901A1 (en) | 2003-07-15 |
| AU2002360901B2 true AU2002360901B2 (en) | 2007-10-25 |
Family
ID=7710961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2002360901A Ceased AU2002360901B2 (en) | 2001-12-24 | 2002-12-18 | Microwave measuring device for detecting the charge of two-phase flow |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP1459055B1 (en) |
| JP (1) | JP4237629B2 (en) |
| KR (1) | KR100677927B1 (en) |
| CN (1) | CN100429506C (en) |
| AT (1) | ATE308040T1 (en) |
| AU (1) | AU2002360901B2 (en) |
| CA (1) | CA2469216C (en) |
| DE (2) | DE10164107C1 (en) |
| DK (1) | DK1459055T3 (en) |
| ES (1) | ES2252536T3 (en) |
| MX (1) | MXPA04006259A (en) |
| PL (1) | PL203750B1 (en) |
| WO (1) | WO2003056316A1 (en) |
| ZA (1) | ZA200404776B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006070948A1 (en) * | 2004-12-28 | 2008-06-12 | 不二雄 黒川 | Gas detection system |
| CN101501476B (en) * | 2006-09-06 | 2013-03-27 | 国立大学法人横浜国立大学 | Passive intermodulation distortion measuring method and system |
| DE102011102991B4 (en) * | 2011-05-24 | 2014-02-13 | Krohne Messtechnik Gmbh | Device for determining the volume fraction of at least one component of a multiphase medium |
| BR112014000509B1 (en) * | 2011-07-13 | 2021-02-09 | Promecon Prozess- Und Messtechnik Conrads Gmbh | device and process for controlling the fuel-air ratio in the combustion of ground coal in a coal plant burning system |
| CN102435237B (en) * | 2011-10-27 | 2013-01-02 | 天津大学 | Gas-solid two-phase flow parameter detector |
| DE102012217274A1 (en) | 2012-09-25 | 2014-03-27 | Siemens Aktiengesellschaft | Device for determining properties of a medium flowing through a cross-sectional area |
| KR101424979B1 (en) | 2013-05-24 | 2014-08-13 | 한국기계연구원 | Measurement method of a two-phase flow of effective density and void fraction |
| JP6461664B2 (en) * | 2015-03-20 | 2019-01-30 | 日野自動車株式会社 | Exhaust gas sensor |
| CN105424564A (en) * | 2015-11-05 | 2016-03-23 | 东北电力大学 | Tuning method for microwave measurement parameters of pulverized-coal concentration |
| DE102016013220B3 (en) * | 2016-11-04 | 2018-05-09 | PROMECON Prozeß- und Meßtechnik Conrads GmbH | Microwave measuring arrangement for determining the loading of a two-phase flow |
| DE102016125809A1 (en) | 2016-12-28 | 2018-06-28 | Endress+Hauser Flowtec Ag | Measuring arrangement for analyzing properties of a flowing medium by means of microwaves |
| CN106768114B (en) * | 2016-12-30 | 2019-07-19 | 光力科技股份有限公司 | Coal dust on-line monitoring system and device |
| ES2904567T3 (en) * | 2017-12-04 | 2022-04-05 | Promecon Gmbh | Endoscope Camera Coupler |
| DE102018003608B3 (en) * | 2018-05-03 | 2019-05-29 | Promecon Process Measurement Control Gmbh | Wind power machine |
| DE102019131504A1 (en) | 2019-11-21 | 2021-05-27 | Endress + Hauser Flowtec Ag | Antenna arrangement for radiation of microwaves and measuring arrangement with at least one such antenna arrangement |
| CN111521225A (en) * | 2020-03-20 | 2020-08-11 | 北京国利衡清洁能源科技(集团)有限公司 | Orifice gas flow measuring device and measuring method thereof |
| CN113029259B (en) * | 2021-02-02 | 2023-06-16 | 辽宁工程技术大学 | Gas-liquid two-phase flow measuring device based on microwaves and rectangular flowmeter, internal transmission line arrangement method and flow measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5101163A (en) * | 1989-10-04 | 1992-03-31 | Agar Corporation Ltd. | Oil/water measurement |
| US5351521A (en) * | 1991-10-18 | 1994-10-04 | Gec-Marconi Limited | Measurement of gas and water content in oil |
| DE29902592U1 (en) * | 1999-02-13 | 1999-06-17 | pro/M/tec Harrer & Kassen GmbH, 75339 Höfen | High frequency rod sensor |
| US6109097A (en) * | 1997-07-04 | 2000-08-29 | Promecon Prozess- Und Messtechnik Conrads Gmbh | Method of determining the flow rate of solid or liquid material in a gaseous medium of a two-phase flow |
| WO2001036951A2 (en) * | 1999-11-19 | 2001-05-25 | Rhino Analytics, Llc | Interferometric microwave sensor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4406046C2 (en) * | 1994-02-24 | 1997-11-20 | Wagner Int | Device and method for measuring a powder mass flow |
| DE19650112C1 (en) * | 1996-12-03 | 1998-05-20 | Wagner Int | Device and method for measuring a powder mass flow |
-
2001
- 2001-12-24 DE DE10164107A patent/DE10164107C1/en not_active Expired - Fee Related
-
2002
- 2002-12-18 DK DK02795004T patent/DK1459055T3/en active
- 2002-12-18 ES ES02795004T patent/ES2252536T3/en not_active Expired - Lifetime
- 2002-12-18 PL PL369876A patent/PL203750B1/en unknown
- 2002-12-18 AU AU2002360901A patent/AU2002360901B2/en not_active Ceased
- 2002-12-18 KR KR1020047010055A patent/KR100677927B1/en active IP Right Grant
- 2002-12-18 MX MXPA04006259A patent/MXPA04006259A/en active IP Right Grant
- 2002-12-18 DE DE50204727T patent/DE50204727D1/en not_active Expired - Lifetime
- 2002-12-18 EP EP02795004A patent/EP1459055B1/en not_active Expired - Lifetime
- 2002-12-18 AT AT02795004T patent/ATE308040T1/en active
- 2002-12-18 JP JP2003556790A patent/JP4237629B2/en not_active Expired - Fee Related
- 2002-12-18 WO PCT/DE2002/004593 patent/WO2003056316A1/en active IP Right Grant
- 2002-12-18 CN CNB028278771A patent/CN100429506C/en not_active Expired - Fee Related
- 2002-12-18 CA CA2469216A patent/CA2469216C/en not_active Expired - Fee Related
-
2004
- 2004-06-17 ZA ZA2004/04776A patent/ZA200404776B/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5101163A (en) * | 1989-10-04 | 1992-03-31 | Agar Corporation Ltd. | Oil/water measurement |
| US5351521A (en) * | 1991-10-18 | 1994-10-04 | Gec-Marconi Limited | Measurement of gas and water content in oil |
| US6109097A (en) * | 1997-07-04 | 2000-08-29 | Promecon Prozess- Und Messtechnik Conrads Gmbh | Method of determining the flow rate of solid or liquid material in a gaseous medium of a two-phase flow |
| DE29902592U1 (en) * | 1999-02-13 | 1999-06-17 | pro/M/tec Harrer & Kassen GmbH, 75339 Höfen | High frequency rod sensor |
| WO2001036951A2 (en) * | 1999-11-19 | 2001-05-25 | Rhino Analytics, Llc | Interferometric microwave sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003056316A1 (en) | 2003-07-10 |
| MXPA04006259A (en) | 2004-10-04 |
| KR20040068347A (en) | 2004-07-30 |
| JP2005513499A (en) | 2005-05-12 |
| CA2469216C (en) | 2010-09-07 |
| DE10164107C1 (en) | 2003-09-18 |
| JP4237629B2 (en) | 2009-03-11 |
| AU2002360901A1 (en) | 2003-07-15 |
| KR100677927B1 (en) | 2007-02-05 |
| PL203750B1 (en) | 2009-11-30 |
| DK1459055T3 (en) | 2006-03-06 |
| CA2469216A1 (en) | 2003-07-10 |
| EP1459055B1 (en) | 2005-10-26 |
| DE50204727D1 (en) | 2005-12-01 |
| ZA200404776B (en) | 2004-11-24 |
| CN1618012A (en) | 2005-05-18 |
| PL369876A1 (en) | 2005-05-02 |
| EP1459055A1 (en) | 2004-09-22 |
| CN100429506C (en) | 2008-10-29 |
| ATE308040T1 (en) | 2005-11-15 |
| ES2252536T3 (en) | 2006-05-16 |
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