CN103620353A - Device for measuring characteristics in a urea tank - Google Patents
Device for measuring characteristics in a urea tank Download PDFInfo
- Publication number
- CN103620353A CN103620353A CN201280021825.0A CN201280021825A CN103620353A CN 103620353 A CN103620353 A CN 103620353A CN 201280021825 A CN201280021825 A CN 201280021825A CN 103620353 A CN103620353 A CN 103620353A
- Authority
- CN
- China
- Prior art keywords
- signal
- sensor
- liquid
- equipment
- main body
- 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.)
- Pending
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000004202 carbamide Substances 0.000 title claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 86
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims description 25
- 230000000644 propagated effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 230000001902 propagating effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2962—Measuring transit time of reflected waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/68—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/68—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means
- G01F23/686—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means using opto-electrically actuated indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/76—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats characterised by the construction of the float
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/148—Arrangement of sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1814—Tank level
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1818—Concentration of the reducing agent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Acoustics & Sound (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a measuring device (10) for measuring characteristics in a liquid tank (9) containing urea, said device including a means (4) for guiding a main body (5) which floats on the liquid and which is mounted so as to be vertically slidable over said guiding means, a first sensor (1) which is attached to the main body, which is suitable for measuring the concentration of urea in the liquid (9), and which includes a first signal transmitter (11) for transmitting first signals (61) and a first receiver (12) for receiving the first signals propagating through the liquid (9), a second sensor (2) which is attached to the main body, which is suitable for measuring a distance relative to the bottom of the tank, and which includes a second signal transmitter (21) for transmitting second signals (62) and a second signal sensor (22); for receiving the second signals reflected by the bottom (23), wherein the volume of liquid in the tank is derived from the measured distance. The invention also relates to a corresponding method for combining the data measured by the two sensors.
Description
Technical field
The present invention relates to measure the equipment of fluid characteristics in for example for the urea tank of I. C. engine exhaust disposal system.
More specifically, the present invention relates to a kind of for determining equipment and the method for the liquid volume existing in urea concentration and tank in tank.
Background technology
The tank metering system of the flotation members that employing is shifted with liquid surface is from prior art.And the device of the urea concentration in measurement water is known, these devices are fixed near tank base generally.The installation cost of this sensor of two types is high and taken a large amount of free spaces.
Summary of the invention
Target of the present invention is to improve the integration of these sensors, and strengthens the function that these sensors provide.
The present invention proposes the measuring equipment of the feature in a kind of tank that is suitable for measuring urea-containing liquid, and described equipment comprises:
Be positioned at the guiding device of tank, it is fixed to tank by stationary installation and extends upward in substantially vertical side with respect to tank,
Be designed to main body floating in described liquid, it is included in the top of liquid surface top and immerses the bottom in liquid, and is installed on described guiding device and slides,
Be fixed to the first sensor of main body, it is suitable for measuring the urea concentration in liquid, comprise the first signal receiver that is suitable for launching the first signal transmitter of first signal and is suitable for receiving described first signal, described first signal is through at least a portion of liquid
Be positioned at the second sensor of bottom part body, it is suitable for measuring the distance with respect to pot bottom, comprise and be suitable for launching the secondary signal transmitter of secondary signal and being suitable for receiving the secondary signal receiver through the described secondary signal from secondary signal transmitter of pot bottom reflection, measured distance represents the liquid volume existing in tank.
Because these are arranged, can be determined that in tank, urea concentration is also determined the liquid volume existing in tank by individual equipment.
In various embodiment of the present invention, also may use described a kind of and/or other layouts below.
The first transmitter can be suitable for predetermined wavelength, launching at least one infrared ray towards the first receiver, then the first receiver is suitable for measuring received ultrared intensity, thereby this intensity makes it to reflect the decay of first signal and derives thus the urea concentration in liquid.
The first transmitter is suitable for towards the first receiver transmitting at least according to the infrared ray of a plurality of wavelength, the first receiver is suitable for measuring the ultrared intensity of each received wavelength, and the existence of impurity in these intensity are derived urea concentration in liquid and liquid; Thereby can detect the existence of easy miscible composition.
First signal is through the top surface of liquid, respond ground, first sensor is suitable for surveying and swims in the impurity on liquid surface, therefore the first receiver makes it to measure the intensity of received signal, and this intensity makes it to reflect the decay of first signal and derives thus the urea concentration and the existence that swims in the impurity on liquid surface in liquid.
One of first signal transmitter or first signal receiver are disposed in the top of main body above surface, that is to say above liquid surface, then another of first signal transmitter or first signal receiver is disposed in below surface in the bottom of the main body being submerged, first signal transmitter and first signal receiver face with each other and arrange with respect to tank in the vertical direction, thereby make first signal pass air-liquid interphase, suspended impurity may be positioned at wherein.
Described equipment can also comprise the 3rd sensor that is suitable for measuring urea concentration in liquid, the 3rd sensor comprises the 3rd signal receiver that is suitable for launching the 3rd signal projector of the 3rd signal and is applicable to receiving described the 3rd signal, the 3rd sensor is arranged in the submergence part of main body, the path that the 3rd signal is propagated is fully included in liquid, respond ground, the information that the 3rd sensor energy transfer ratio first sensor transmits is concentration information more accurately, and then according to the information of this first sensor, the information of being transmitted by the 3rd sensor makes it to derive thus the information (concentration existing about impurity more accurately, type etc.).
Described equipment also comprises single control circuit, and first sensor and the second sensor are connected to described single control circuit, and the 3rd sensor (when there is the 3rd sensor) is also connected to described single control circuit, makes the cost minimization of this scheme.
First sensor, the second sensor and the 3rd sensor (when there is the 3rd sensor) are positioned on the same P.e.c. that is positioned at bottom part body, in this case, described equipment comprises and is positioned at main body top and in the face of first and the mirror of the 3rd sensor, be used for reflecting first signal and the 3rd signal (when the latter exists), thereby the cost minimization of this scheme and integration are enhanced.
Guiding device comprises by stationary installation (such as one or more screws) and is fixed to base and the guide rod of pot bottom, thereby main body can be slided and freely floating in liquid without resistance along this bar.
It is indoor that first sensor, the second sensor, the 3rd sensor (when there is the 3rd sensor) and described single control circuit are disposed in tightening seal, thereby make the protected not liquid body impact of electronic component.
Secondary signal is for example the ultrasonic signal being reflected at the bottom of tank, thereby the mistiming that makes to measure between the transmitting and receiving of secondary signal is uncomplicated.
The present invention also proposes concentration in a kind of tank of the liquid that contains urea for device measuring described before adopting and the method for liquid level.
Accompanying drawing explanation
By reading according to accompanying drawing below as given three descriptions that embodiment carries out of the present invention of non-limiting example, it is clear that other aspects of the present invention, target and advantage will become, wherein:
Fig. 1 show in the tank that is disposed in the liquid that contains urea according to the measuring equipment of first embodiment of the invention,
Fig. 2 is the planimetric map of the equipment in Fig. 1,
Fig. 3 has shown the surface details figure with the liquid of the impurity existing,
Fig. 4 has shown the second embodiment of the present invention,
Fig. 5 has shown the third embodiment of the present invention,
Fig. 6 has shown the modification of third embodiment of the invention.
In different figure, identical Reference numeral represents same or analogous element.
Embodiment
Fig. 1 shows and is suitable for measuring for example for the measuring equipment 10 of the fluid characteristics in the tank that contains urea 8 of I. C. engine exhaust disposal system.
In example shown in the figure, guiding device 4 comprises base 42 and substantially vertical guide rod 41, and the zone circle (strap) 51 that is fixedly attached to described main body can stride across guide rod and slide.
As shown in the figure, base 42 for example, is that screw or the securing member 44 that is clasped are fixed in the additional thickness 80 of the inner side that is arranged in tank 8 bottoms by ().Guiding device 4 can be produced not depart from the different mode of framework of the present invention.
The mode that liquid regions 9 can change with concentration comprises water and urea generally, but this concentration must be determined successively quite exactly in the application of expection, to guarantee to manage well the pollution control processing of oxides of nitrogen in internal-combustion engine vent-pipe.
Liquid regions has top surface 90, has air above top surface.On the surface 90 of liquid, may exist not with water in the miscible impurity of urea, for example, such as, the hydrocarbon of any type lighter than aqueous urea solution.
As shown in Figure 3, the globule 91 of hydrocarbon or or even thicker layer 91 (for example) can swim on surface 90.The existence of described impurity may come from the mistake aspect vehicle driver when filling main fuel tank.This can cause the damage of gas outlet or cause being injected into the incorrect metering of the urea amount in pollution control device, so this is harmful to.So consider that described impurity is very important while surveying described impurity and/or the urea dosage in management gas outlet.
Described urea tank also may contain easily miscible impurity, and the existence of these impurity and concentration may affect the true(-)running of pump-down process.
As illustrated in fig. 1 and 2, described main body is included in the top 50a of liquid surface top and is immersed in the bottom 50b in liquid, and comprises following element:
Low-density floating element 52 (for example being made by polystyrene foam or other equivalent material), its size (according to its characteristic) is designed to give floating ability to the main body of having equipped this element,
Generally include the control module 7 of integrated circuit (not shown),
Be fixed to the first sensor 1 of main body, it is especially suitable for measuring the urea concentration in liquid 9, comprise the first signal receiver 12 that is suitable for launching the first signal transmitter 11 of first signal 61 and is suitable for receiving described first signal 61, described first signal 61 is through at least a portion of liquid 9 volumes
Preferably in the 50b of the submergence bottom of described main body, be fixed to the second sensor 2 of main body, it is suitable for measuring the distance with respect to pot bottom, comprise the secondary signal receiver 22 that is suitable for launching the secondary signal transmitter 21 of secondary signal 62 and is suitable for receiving the secondary signal 65 being reflected by pot bottom 23
Encapsulate the tightening seal chamber 50 of all above-mentioned electronic equipments,
For the connecting line 53 that described device is connected with vehicular electrical equipment (not shown).
Suppose that main body 5 is freely floating with respect to the floating line consisting of liquid surface 90, the vertical position of first sensor 1 and the second sensor 2 is fixed with respect to this liquid surface 90.
This, relevant in the situation that, the vertical position of the first transmitter 11 and the first receiver 12 remains unchanged with respect to liquid surface 90, because main body 5 and equipment thereof follow the vertical displacement of liquid surface 90, is shifted.Therefore the distance that, first signal 61 is propagated in liquid is constant.Because the first receiver 12 is suitable for measuring received ultrared intensity, so electronic circuit 7 can be derived decay from this intensity (distance between the first transmitter 11 and the first receiver 12 is constant), described decay is introduced as the function of predetermined concentration-decay calibration scale by the urea concentration of liquid.
The second sensor 2 towards the secondary signal 62 of pot bottom 23 transmitting can be also optics or electromagnetism.In the example shown, these secondary signals 62 are preferably hyperacoustic or infrared.In secondary signal, be in hyperacoustic situation, secondary signal 62 in the first transmitting constantly leads towards pot bottom 23, it is reflected by pot bottom 23 at pot bottom place, and towards the second receiver 22, returning to (referring to Fig. 1) as reflected signal 65 (referring to Fig. 1), it arrived in the more late moment.
So the second sensor 2 makes it to measure the mistiming Δ t that is launched secondary signals 62 and received between the described secondary signal 65 being reflected by the bottom 23 of tank 8 by the second receiver 22 by the second transmitter 21.
In addition, the urea concentration in the determined liquid of first sensor 1 makes it to determine the ultrasonic propagation velocity Vs in liquid, and this speed is the function of measured concentration.Described definite preset parameter table that is basis is for example stored in control module 7 (electronic circuit) has been done.According to the ultrasonic propagation velocity Vs in measured mistiming Δ t and the liquid that calculates, the distance that the secondary signal 62 of transmitting and the secondary signal 65 of reflection are propagated is derived.If the second sensor, the second transmitter and the second receiver are positioned on identical vertical height, described distance is the twice (because secondary signal has been carried out round trip 62,65) of the distance d1 at the second transmitter 21 or receiver 22 and pot bottom 23 intervals.By following formula, the distance d1=in good time recording (Vs * Δ t)/2 makes it to derive the liquid volume Vol existing in tank:
Vol＝[(Vs×Δt)／2+d0]×S (1)
Wherein:
-d0: the known and fixing distance between liquid surface 90 and the vertical position of the second sensor 2, and
-S: the equivalent cross-section of tank 8.
Significantly, in the measurement of mistiming and therefore if stagger mutually with respect to vertical direction in the position of the second transmitter 21 and the second receiver 22, in the measurement of the distance between the second transmitter 21 and pot bottom or the distance between the second receiver 22 and pot bottom, must consider this distance.
In secondary signal, be infrared in the situation that, secondary signal transmitter 21 is for example with predetermined frequency infrared signal 62, to this known decay as urea concentration function.Meanwhile, the second receiver 22 is received in the reflective infrared signal 65 after reflection on pot bottom 23, and measures its intensity.In this way, the decay associated with round trip (namely distance 2 * d1) can be calculated.
Because the urea concentration in given time tank 8 is known by the first sensor 1 explained before, so pass the decay of the signal intensity of liquid on the per unit length of propagating, can determine by described before concentration-decay calibration scale.Then by the second sensor 2, measured decay makes it the total distance that may determine that secondary signal is propagated in its transmitting 62 and its reflection 65, and then this distance is divided by two values that provide apart from d1.
All the other of the liquid volume Vol derive existing are thus calculated previously in the formula (1) of explaining in the situation of ultrasonic signal does not have difference.
Fig. 4 shows the second embodiment of the present invention, and it is the improvement on the first embodiment, wherein in equipment, has increased by the 3rd sensor 3, and it is arranged in the submergence bottom 50b of main body 5.
The 3rd sensor 3 is suitable for only measuring the urea concentration in liquid 9, and it measures the impact of the impurity existing on liquid body surface 90 not.
The 3rd sensor 3 comprises the 3rd signal projector 31 that is suitable for launching the 3rd signal 33, and the 3rd signal receiver 32 that is suitable for receiving described the 3rd signal 33, the 3rd receiver 32 faces the 3rd transmitter 31 location with respect to tank 8 in the vertical directions, the path that described the 3rd signal 33 is propagated strides across predetermined fixed range and is completely contained in liquid 9, and described fixed range is the spacing distance of the 3rd transmitter 31 and the 3rd receiver 32.
In the example shown, the 3rd signal 33 is infrared type, and can comprise a plurality of different frequencies, particularly obvious especially frequency, for example 1.1 mum wavelengths of urea decay.
Therefore, the 3rd sensor 3 can transmit urea concentration information very accurately, and this information is associated with the decay that strides across fixed range, the impact of any impurity not existing on liquid body surface 90.
Therefore, first sensor 1 provides the information about urea and impurity existence.Then, because the urea concentration that not existed by impurity to affect is known by means of the 3rd sensor 3, so only being derived by calculating by the caused decay of existing of impurity on surface of standing of signal.
Fig. 5 shows the third embodiment of the present invention, and it is substituting of the first and second embodiment, wherein uses the-mirror 13, is advantageously located in the top 50a of side from the teeth outwards of main body 5.The first signal 61 that these mirror 13 reflections are launched by the first transmitter 11, thus the first transmitter 11 and the first receiver 12 can be positioned in the bottom 50b of main body 5 abreast.
Similarly, about the 3rd sensor 3 (if it exists), another mirror 33 is positioned, be arranged on main body 5 in the 50a of the top of described surface and face the 3rd transmitter 31, described the 3rd transmitter is disposed in the 3rd receiver 32 sides, the 3rd transmitter and the 3rd receiver are both arranged in the bottom 50b of main body, thereby make the 3rd signal 63 turn back to the 3rd receiver 32 through described mirror 33 reflections.
According to the present invention, advantageously, first sensor 1, the second sensor 2 and the 3rd sensor 3 (when the latter exists), be arranged on the identical control circuit 7 as illustrated in Figures 5 and 6 (or identical integrated circuit) of the bottom 50b that is arranged in main body 5.
About the 3rd embodiment, should be noted that the 3rd sensor 3 is optics, the information that it makes it to provide according to first sensor 1 is determined urea concentration and impurity concentration more accurately.Apart from d1, determine that the content maintenance illustrated with embodiment is before identical.
Fig. 6 represents third embodiment of the invention-kind of modification, and wherein the first and the 3rd transmitter (11,31) has only formed same transmitter 110, described transmitter 110 transmittings and the before individual signals 660 of the first and the 3rd signal 61,63 equivalences of embodiment.This individual signals 660 is a little angularly launched with respect to vertical direction.So, a part for individual signals 660 turns back to the first receiver 12 by the first mirror 13 (face top 50a location) reflection, and another part of individual signals 660 is reflected by the refraction action at the air-liquid interphase place of liquid surface 34 and turns back to the 3rd receiver 32.
It should be noted that in all embodiment, first sensor 1 and the second sensor 2 are connected to described identical control circuit 7 (it only has) and the 3rd sensor 3 (when it exists) is also connected to described control circuit 7.
The function of control circuit 7 comprises two or three sensors 1,2,3 that management is above-mentioned.Control circuit 7 is coordinated the transmitting of all signals and the calculating of concentration and liquid volume.
It is controlled first signal 61 and then receives by the measured intensity of the first receiver 12 towards the first transmitter 11 transmittings.Control circuit 7 calculates decay or surveyed data is passed to electronic remote computing machine (not shown).Utilize predetermined calibration scale, the decay in good time calculating makes it to derive the urea concentration in liquid.
Similarly, control circuit 7 is controlled at first and launches secondary signal 62 constantly, measures transmitting secondary signal and receives the mistiming Δ t between these secondary signals that reflect.Control circuit 7 is processed described information or is passed to electronic remote computing machine.
When the 3rd sensor 3 exists, single control circuit 7 is controlled the 3rd signals 63 towards the transmitting of the 3rd transmitter 31, and receives by the 3rd receiver 32 measured intensity in reception.Control circuit 7 calculates described decay or data measured is passed to electronic remote computing machine.Utilize predetermined calibration scale, the decay in good time calculating makes it to determine more accurately the urea concentration in liquid, and is not subject to the impact of the impurity that may exist on liquid surface 90.Then, as described above, control circuit 7 (or remote computer) utilization calculates the specific features relevant to lip-deep impurity by the collected information of first sensor 1.
It should be noted that in instructions the sensor that is called as " first sensor 1 " is appreciated that the assembly that expression consists of first sensor 1 and the 3rd sensor 3 in the second and the 3rd described before embodiment situation.
So, utilizing a compactness and the equipment of tightening seal, the present invention makes it possibility:
Determine the urea concentration in contained liquid in tank,
Determine impurity concentration and type,
Determine pot liquid volume.
Make above-mentionedly to determine that becoming possible sensor can be integrated on identical control circuit.
Significantly, the invention is not restricted to the application of urea tank, and can be used to any liquid tank of concentration, impurity and volume that will be definite.
Claims (14)
1.-and kind being suitable for measuring the measuring equipment (10) of the feature in the tank (8) of urea-containing liquid, described equipment comprises:
Be positioned at the guiding device (4) of tank (8), it is fixed to tank (8) by stationary installation (44) and extends upward in substantially vertical side with respect to tank (8),
Be designed to main body floating in described liquid (5), it is included in the top (50a) of liquid surface top and immerses the bottom (50b) in liquid, and is installed in the upper slip of described guiding device (4),
Described equipment also comprises:
Be fixed to the first sensor (1) of main body, it is suitable for measuring the urea concentration in liquid (9), comprise the first signal receiver (12) that is suitable for launching the first signal transmitter (11) of first signal (61) and is suitable for receiving described first signal, described first signal is through at least a portion of liquid (9)
Be arranged in second sensor (2) of bottom part body (50b), it is suitable for measuring the distance with respect to tank (8) bottom, comprise and be suitable for launching the secondary signal transmitter (21) of secondary signal (62) and be suitable for receiving the secondary signal receiver (22) through the described secondary signal (65) from secondary signal transmitter of pot bottom (23) reflection, measured distance (d1) represents the liquid volume (Vol) existing in tank (8)
Described equipment is characterised in that it also comprises:
The 3rd sensor (3), described the 3rd sensor (3) is arranged in the bottom (50b) of main body (5) and is suitable for measuring liquid (9) urea concentration, described the 3rd sensor (3) comprises the 3rd signal receiver (32) that is suitable for launching the 3rd signal projector (31) of the 3rd signal (33) and is applicable to receiving described the 3rd signal, and the path that described the 3rd signal (33) is propagated is completely contained in liquid (9).
2. the equipment as described in aforementioned claim, it is characterized in that, one of them is disposed in liquid surface (90) top in the top of main body (5) (50a) first signal transmitter (11) and first signal receiver (12), it is following in the bottom of main body (5) (50b) that another in first signal transmitter (11) and first signal receiver (12) is disposed in surface, and first signal transmitter and first signal receiver face with each other and arrange in substantially vertical direction with respect to tank (8).
3. the equipment as described in one of claim 1 or 2, it is characterized in that, first signal (61) is through the top surface (90) of liquid, respond ground, first sensor (1) is suitable for surveying and swims in the impurity (91) on liquid surface, the first receiver (11) is measured the intensity of received signal, thereby derives thus urea concentration and the existence that swims in the impurity on liquid surface in liquid.
4. the equipment as described in claim 1 and 2, it is characterized in that, the first transmitter (11) is suitable at least one infrared ray (61) towards the first receiver (12) guiding with predetermined wavelength transmitting, and wherein, the first receiver (12) is suitable for measuring received ultrared intensity.
5. the equipment as described in claim 1-3, it is characterized in that, the first transmitter (11) is suitable at least infrared ray (61) towards the first receiver (12) guiding according to a plurality of wavelength emission, and wherein, the first receiver (12) is suitable for measuring the ultrared intensity of each received wavelength.
6. the equipment as described in one of claim 1-5, also comprises control circuit (7), it is characterized in that, first sensor (1) and the second sensor (2) are connected to described control circuit (7).
7. equipment as claimed in claim 1, also comprises control circuit (7), it is characterized in that, first sensor (1), the second sensor (2) and the 3rd sensor (3) are connected to described control circuit (7).
8. equipment as claimed in claim 6, is characterized in that:
First sensor (1) and the second sensor (2) are positioned on the same P.e.c. of control circuit (7) of the bottom (50b) that is arranged in main body (5), and
Described equipment comprises that the top (50a) that is arranged in main body (5) is for reflecting the-mirror (13) of first signal (61).
9. the equipment as described in claim 1 and 8, is characterized in that:
First sensor (1), the second sensor (2) and the 3rd sensor (3) are positioned on the same P.e.c. of control circuit (7) of the bottom (50b) that is arranged in main body (5), and
Described equipment also comprises that the bottom (50b) that is arranged in main body (5) is for reflecting second mirror (33) of the 3rd signal (63).
10. equipment as claimed in claim 1, it is characterized in that, the first and the 3rd transmitter (11,31) be arranged in the bottom (50b) of main body (5), and form with the only transmitter (110) with respect to the angled direction transmitting individual signals of vertical direction (660), a part for described individual signals is reflected by the refraction action on liquid surface (34), and a part is being arranged in the upper reflection of mirror (13) at the top (50a) of main body (5).
11. equipment as described in one of aforementioned claim, is characterized in that, guiding device (4) comprises base (42) and guide rod (41).
12. equipment as described in arbitrary aforementioned claim, is characterized in that, described main body (5) is disposed in tightening seal chamber (50).
13. equipment as claimed in claim 1, is characterized in that, secondary signal (62,65) is the ultrasonic signal in the upper reflection of pot bottom (23).
Concentration in the tank (8) of 14. 1 kinds of urea-containing liquid of measurement (9) and the method for liquid level, it has adopted the equipment described in arbitrary aforementioned claim.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1101381A FR2974903B1 (en) | 2011-05-05 | 2011-05-05 | DEVICE FOR MEASURING CHARACTERISTICS IN A UREA RESERVOIR |
| FR1101381 | 2011-05-05 | ||
| PCT/EP2012/001652 WO2012150002A1 (en) | 2011-05-05 | 2012-04-17 | Device for measuring characteristics in a urea tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103620353A true CN103620353A (en) | 2014-03-05 |
Family
ID=45974250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280021825.0A Pending CN103620353A (en) | 2011-05-05 | 2012-04-17 | Device for measuring characteristics in a urea tank |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103620353A (en) |
| FR (1) | FR2974903B1 (en) |
| WO (1) | WO2012150002A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108138628A (en) * | 2015-10-13 | 2018-06-08 | 全耐塑料高级创新研究公司 | Method for determining a physicochemical parameter of a chemical agent in a fluid and system for use in the method |
| CN110714816A (en) * | 2018-07-11 | 2020-01-21 | 通用汽车环球科技运作有限责任公司 | Reflector of urea concentration sensor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160047687A1 (en) * | 2013-03-22 | 2016-02-18 | The University Of Western Ontario | Self-calibrating ultrasonic-based monitoring system |
| DE102013112824A1 (en) * | 2013-11-20 | 2015-05-21 | Elobau Gmbh & Co. Kg | withdrawal unit |
| DE102015122292A1 (en) * | 2015-12-18 | 2017-06-22 | Endress+Hauser Conducta Gmbh+Co. Kg | Field device for determining a process variable of a medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004036645A1 (en) * | 2004-07-28 | 2006-02-16 | Landis+Gyr Gmbh | Ultrasonic level sensor device |
| US7735354B2 (en) * | 2006-01-25 | 2010-06-15 | Ngk Spark Plug Co., Ltd. | Liquid-condition detection sensor |
| US20070255458A1 (en) * | 2006-04-28 | 2007-11-01 | Haslem Keith R | System and method for managing stratified liquids in storage tanks |
| WO2010069924A2 (en) * | 2008-12-17 | 2010-06-24 | Axsensor Ab | Acoustic liquid measurement |
| BRPI1014584A2 (en) * | 2009-06-26 | 2016-04-26 | Schrader Electronics Ltd | liquid level and quality detection apparatus, systems and methods using emf wave propagation. |
-
2011
- 2011-05-05 FR FR1101381A patent/FR2974903B1/en not_active Expired - Fee Related
-
2012
- 2012-04-17 WO PCT/EP2012/001652 patent/WO2012150002A1/en active Application Filing
- 2012-04-17 CN CN201280021825.0A patent/CN103620353A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108138628A (en) * | 2015-10-13 | 2018-06-08 | 全耐塑料高级创新研究公司 | Method for determining a physicochemical parameter of a chemical agent in a fluid and system for use in the method |
| CN110714816A (en) * | 2018-07-11 | 2020-01-21 | 通用汽车环球科技运作有限责任公司 | Reflector of urea concentration sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2974903B1 (en) | 2014-08-29 |
| WO2012150002A1 (en) | 2012-11-08 |
| FR2974903A1 (en) | 2012-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103620353A (en) | Device for measuring characteristics in a urea tank | |
| US9013959B2 (en) | Long-range acoustical positioning system on continental shelf regions | |
| US20170010143A1 (en) | System and method for measuring a signal propagation speed in a liquid or gaseous medium | |
| US6650280B2 (en) | Measurement system and method | |
| US8746045B2 (en) | System and method for identifying fluids and monitoring fluid quality in a vessel | |
| US7728759B2 (en) | System and method for using iridium satellite signals for meteorological measurements | |
| US20100018309A1 (en) | Fluid level measuring method and system therefor | |
| EP1676102B1 (en) | Fluid level measurement device | |
| US8201446B2 (en) | Ultrasonic fluid measurement method | |
| US20080060431A1 (en) | Radar level gauging | |
| US20120265454A1 (en) | Method For Determining Flow Characteristics Of A Medium And Associated Apparatus | |
| US8274860B2 (en) | Distance measurement apparatus and related methods | |
| US7667635B2 (en) | System and method using airborne radar occultation for measuring atmospheric properties | |
| MX2011010164A (en) | Determining a position of a survey receiver in a body of water. | |
| KR101576438B1 (en) | method of measuring level of liquid errorless and radar level gauge system using the same | |
| CN105181068A (en) | Liquid volume measuring device based on ultrasonic wave, liquid volume measuring method and monitoring method | |
| US5062295A (en) | Dual tube sonic level gage | |
| CN103913746B (en) | A kind of boats and ships drinking water automobile overweight detecting system and detection method thereof | |
| US6202484B1 (en) | Method and device for determining a liquid level with the aid of ultrasonic pulses | |
| US9170146B2 (en) | Method for fill level measurement according to the travel time principle | |
| CN104422495A (en) | Method for determining a fill level of a medium and device for determining a fill level of a medium | |
| JP2017534526A (en) | A method for calculating the surface (water surface) speed of at least one ship, and a method for estimating each drift (floating) vector at all points in the route of the ship. | |
| RU2350983C2 (en) | Method for determination of object submersion depth | |
| US20140096591A1 (en) | Ultrasonic Tools for Detection of Gasoline/Ethanol Phase Separation | |
| KR100747596B1 (en) | Fuel tank for vehicle capable of accurate measurement of remaining fuel capacity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140305 |