WO2005073700A1 - 液種識別装置 - Google Patents
液種識別装置 Download PDFInfo
- Publication number
- WO2005073700A1 WO2005073700A1 PCT/JP2005/000894 JP2005000894W WO2005073700A1 WO 2005073700 A1 WO2005073700 A1 WO 2005073700A1 JP 2005000894 W JP2005000894 W JP 2005000894W WO 2005073700 A1 WO2005073700 A1 WO 2005073700A1
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- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- temperature
- voltage value
- measured
- liquid type
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 342
- 238000001514 detection method Methods 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 41
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 32
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 32
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 28
- 238000011088 calibration curve Methods 0.000 claims description 29
- 238000012546 transfer Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 11
- 238000012935 Averaging Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 239000000446 fuel Substances 0.000 description 32
- 238000002485 combustion reaction Methods 0.000 description 27
- 238000010586 diagram Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 239000012530 fluid Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- 239000010409 thin film Substances 0.000 description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 239000003502 gasoline Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000256297 Euphorbia tirucalli Species 0.000 description 1
- YSVZGWAJIHWNQK-UHFFFAOYSA-N [3-(hydroxymethyl)-2-bicyclo[2.2.1]heptanyl]methanol Chemical compound C1CC2C(CO)C(CO)C1C2 YSVZGWAJIHWNQK-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229940078552 o-xylene Drugs 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
Definitions
- the present invention relates to a liquid type identification device that identifies the type of a liquid by using the thermal properties of the liquid.
- gasoline or light oil is generally used as fuel. These are mixtures of various hydrocarbons and other materials.
- plant-based fuels in gasoline are used as fuel for internal combustion engines. It has been considered to mix alcohols such as ethanol or methanol.
- the material composition of these fuels is determined according to the material composition and distilling conditions of crude oil, which is a raw material for gasoline and light oil, and the amount of alcohol added. Therefore, the characteristics of the combustion of these fuels vary depending on the material composition. Etc.) may not be optimal for other fuels
- the detected fuel type is similar to a predetermined fuel type
- Patent Document 1 discloses a method in which a heating element is heated by energization, and a thermosensitive element is heated by this heat generation.
- a fluid identification method in which the fluid to be identified thermally influences the heat transfer from the heating element to the temperature-sensitive body, and the type of the fluid to be identified is determined based on the electrical output corresponding to the electrical resistance of the temperature-sensitive body. Further, there is disclosed an apparatus in which energization of a heating element is periodically performed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-153561 (in particular, paragraphs [0042] and [0049])
- Patent Document 1 can identify fluids having considerably different properties, such as water, air, and oil, using representative values, for example. Accurate and quick distinction between hydrocarbon liquid and alcohol liquid Cannot be done well enough.
- the present invention provides an identification device that can accurately, quickly, and easily identify a hydrocarbon-based liquid and an alcohol-based liquid that can be used as fuel in particular. It is intended for that purpose.
- the present invention provides an identification device capable of accurately, quickly and easily identifying what kind of liquid to be measured is a hydrocarbon liquid or an alcohol liquid. The purpose is.
- a liquid type identification device for identifying a liquid to be measured belonging to a hydrocarbon-based liquid or an alcohol-based liquid,
- the identification sensor unit includes an indirectly heated liquid type detection unit including a heating element and a temperature sensing element, and the liquid to be measured. And a liquid temperature detecting unit for detecting the temperature of the
- a single pulse voltage is applied to the heating element of the indirectly heated liquid type detection unit to cause the heating element to generate heat, and includes a temperature sensing element of the indirectly heated liquid type detection unit and the liquid temperature detection unit. And a discriminating operation unit for discriminating the liquid to be measured based on the output of the liquid type detection circuit, wherein the discriminating operation unit determines the initial temperature of the thermosensitive element when the heat generating element generates heat.
- the first voltage value corresponding to the liquid type corresponding to the difference from the first temperature at the lapse of the first time from the start of the single pulse application, the initial temperature of the thermosensitive element, and the first temperature from the start of the single pulse application.
- a liquid type identification device wherein the liquid to be measured is identified by a liquid type-corresponding second voltage value corresponding to a difference from a second temperature at a lapse of a second time longer than the second time.
- the second time is an application time of the single pulse.
- the first time is ⁇ or less of the application time of the single pulse.
- the first time is 0.5-1.5 seconds.
- the application time of the single pulse is 3 to 10 seconds.
- the voltage value corresponding to the initial temperature of the temperature sensitive body is obtained by using an average initial voltage value obtained by sampling and averaging the initial voltage before the application of the single pulse to the heating element a predetermined number of times.
- an average first voltage value obtained by sampling and averaging the first voltage at a lapse of a first time a predetermined number of times from the start of the single pulse application to the heating element (2)
- an average second voltage value obtained by sampling a predetermined number of times of a second voltage after a lapse of a second time from the start of the single pulse application to the heating element and averaging the same is used.
- the difference between the average first voltage value and the average initial voltage value is used as the liquid type corresponding first voltage value
- the average second voltage value and the average initial voltage value are used as the liquid type corresponding second voltage value.
- the difference from the voltage value is used.
- a liquid temperature corresponding output value corresponding to the liquid temperature of the liquid to be measured is input from the liquid temperature detection unit to the identification calculation unit, and the identification calculation unit
- the liquid temperature correspondence obtained for the measurement target liquid to be identified is obtained using a calibration curve prepared based on the plurality of types of reference liquids to be measured and showing the relationship of the liquid type corresponding first voltage value to the liquid temperature. Based on the output value and the liquid type-corresponding first voltage value, it is determined whether the liquid to be measured is a hydrocarbon liquid or an alcohol liquid.
- a liquid temperature corresponding output value corresponding to the liquid temperature of the liquid to be measured is input from the liquid temperature detecting unit to the identification calculation unit, and the identification calculation unit includes a hydrocarbon-based liquid.
- the identification calculation unit includes a hydrocarbon-based liquid.
- the identification calculation unit includes a microcomputer.
- the indirectly heated liquid type detection unit and the liquid temperature detection unit are respectively a heat transfer member for the liquid type detection unit and a heat transfer for the liquid temperature detection unit for heat exchange with the liquid to be measured. It has a member.
- a single pulse voltage is applied to the heating element of the indirectly heated liquid type detection unit to cause the heating element to generate heat, and the identification calculation unit based on the output of the liquid type detection circuit, Said
- the liquid to be measured belonging to hydrocarbon liquid or alcohol liquid is identified based on the liquid type first voltage value and liquid type corresponding second voltage value when the heating element generates heat. And it can be easily identified.
- an average initial voltage value is used as a voltage value corresponding to the initial temperature of the temperature sensing element
- the average first voltage value is used as a voltage value corresponding to the first temperature of the temperature sensing element
- the average second voltage value is used as a voltage value corresponding to the second temperature of the thermosensitive body
- the difference between the average first voltage value and the average initial voltage value is used as the liquid type corresponding first voltage value
- the liquid temperature-corresponding output value obtained for the liquid to be measured and the liquid type-corresponding first voltage value are used.
- the calibration curve indicating the relationship the liquid to be measured is identified based on the output value corresponding to the liquid temperature obtained for the liquid to be measured, the second voltage value corresponding to the liquid type, and the result of the determination. By doing so, more accurate identification becomes possible.
- FIG. 1 is a schematic configuration diagram showing a use state of an embodiment of a liquid type identification device according to the present invention
- FIG. 24 is a partial cross-sectional view thereof.
- the measured liquid supply path supplies the measured liquid from the tank of the measured liquid (fuel) to the internal combustion engine.
- the measured liquid supply path of the present invention is not limited to this.
- a path for supplying the liquid to be measured from a tank to a tank lorry, or a path for supplying the liquid to be measured from a large tank to a small tank may be used.
- a liquid type identification device 1 for identifying the type of the liquid to be measured is arranged in the course of supplying the liquid to be measured from the liquid tank T to the internal combustion engine E to the liquid to be measured. ing.
- the identification device 1 includes a measurement section 3, a first flow passage 4T having one end connected to a tank side portion (pipe) 14T, which is an upstream portion of the liquid supply path, by a pipe joint 8T, and a liquid to be measured.
- An internal combustion engine-side portion (pipe) 14E which is a downstream portion of the supply path, includes a second flow passage 4E, one end of which is connected by a pipe joint 8E.
- the measuring section 3 has a liquid flow path 20 to be measured formed by the case substrate 2a and the case force bar 2b, and one end of the flow path (the lower end in FIGS. 13A and 13B) has the first flow path 4T. And the other end (the upper end in FIGS. 13 to 13) is connected to the other end of the second flow passage 4E.
- the identification device of the present embodiment is connected to the measuring section 3 and a part of the first flow path 4T (that is, as shown in FIG. 1, connected to the tank side portion 14T of the liquid supply path to be measured).
- Part of the second flow passage 4E (that is, the part other than the end connected to the engine side part 14E of the liquid supply path to be measured as shown in FIG. 1). It has a housing 6 for housing.
- the portion of the first flow passage 4T outside the housing 6 (that is, the end connected to the tank side portion 14T of the liquid supply path to be measured) is covered with a heat insulating coating material 4T1, and the second flow passage 4E The portion outside the housing 6 (that is, the end connected to the engine side portion 14E of the liquid supply path to be measured) is covered with the heat insulating coating 4E1.
- a circuit board 12 constituting a liquid type detection circuit described later is arranged in the housing 6, a circuit board 12 constituting a liquid type detection circuit described later is arranged.
- the circuit board 12 is provided with a microcomputer (microcomputer) constituting a discrimination calculation unit described later. Further, a wiring 13 for communication between the circuit board 12 and the outside is provided.
- the interior space of the housing 6 (a part excluding the measurement unit 3, the first flow passage 4T, the second flow passage 4 ', the circuit board 12, and the like) is filled with a heat insulating material.
- a heat insulating material and the heat insulating covering materials 4 1 and 4E1 for example, those made of rubber or foamed plastic can be used.
- the measuring unit 3 includes an identification sensor unit 2 disposed facing the liquid flow path 20 to be measured.
- the identification sensor section 2 has an indirectly heated liquid type detection section 21 including a heating element and a temperature sensing element, and a liquid temperature detection section 22 for measuring the temperature of the liquid to be measured.
- Indirectly heated liquid type detection unit 21 The liquid temperature detector 22 is arranged at a certain distance in the vertical direction.
- Fig. 5 shows a cross-sectional view of the indirectly heated liquid type detection unit 21.
- the indirectly heated liquid type detection unit 21 and the liquid temperature detection unit 22 are integrated by a mold resin 23.
- the indirectly heated liquid type detection unit 21 is composed of a thin film chip 21a including a heating element and a temperature sensing element, and a liquid joined by the thin film chip and a bonding material 2 lb. It has a metal fin 21c as a heat transfer member for the seed detection section, and external electrode terminals 21e electrically connected to electrodes of a heating element and a temperature sensing element of a thin film chip, respectively, by bonding wires 21d.
- the liquid temperature detecting section 22 has a similar configuration, and has a metal fin 22c and an external electrode terminal 22e as a heat transfer member for the liquid temperature detecting section.
- FIG. 6 is an exploded perspective view of the thin film chip 21a of the indirectly heated liquid type detection unit 21.
- the thin film chip 2 la is composed of, for example, Al O force, a substrate 21al made of Ti, a temperature sensing element 21a2 made of Ti / Pt,
- An inter-layer insulating film 21a3 consisting of 2 3 2
- a heating element 21a4 consisting of TaSiO
- the temperature sensing element 21a2 is formed in a meandering pattern (not shown).
- the thin film chip 22a of the liquid temperature detecting section 22 has the same structure, but only the temperature sensing element 22a2 is operated without operating the heat generating element.
- the indirectly heated liquid type detection unit 21 and the mold resin 23 of the liquid temperature detection unit 22 are attached to the case substrate 2 a of the measurement unit 3.
- the case substrate 2a is provided with a cover member 2d so as to pass through the fins 21c for the liquid type detection unit and the fins 22c for the liquid temperature detection unit.
- a liquid introduction passage 24 to be measured is formed which extends vertically in FIG. 13 through the liquid type detecting portion fins 21c and the liquid temperature detecting portion fins 22c and is open at both upper and lower ends.
- the cover member 2d when the cover member 2d is attached to the case substrate 2a, the flange portion of the mold resin 23 is pressed toward the case substrate 2a, whereby the mold resin 23 is displaced. It is fixed against.
- the case substrate 2a, the case cover 2b, the cover member 2d, the first flow passage 4T, and the second flow passage 4E are made of a corrosion-resistant material such as stainless steel.
- FIG. 7 shows a configuration of a circuit for identifying a liquid type in the present embodiment.
- the above-mentioned indirectly heated liquid A bridge circuit 68 is formed by the temperature sensing element 21a2 of the seed detection unit 21, the temperature sensing element 22a2 of the liquid temperature detection unit 22, and the two resistors 64 and 66.
- the output of the bridge circuit 68 is input to the differential amplifier 70, and the output of the differential amplifier (also referred to as the liquid type detection circuit output or sensor output) constitutes a discrimination calculation unit via an AZD converter not shown.
- Microcomputer microcomputer Input to 72.
- the microcomputer 72 receives a liquid temperature corresponding output value corresponding to the liquid temperature to be measured from the temperature sensing element 22a2 of the liquid temperature detecting section 22 via the liquid temperature detecting amplifier 71. On the other hand, the microcomputer 72 outputs a heater control signal for controlling the opening and closing of the switch 74 located on the power supply path to the heating element 21a4 of the indirectly heated liquid type detection unit 21.
- liquid type identification is performed when the engine operation is stopped.
- the supply path of the liquid to be measured from the tank T to the engine E is always filled with the liquid to be measured, including the inside of the liquid flow path 20, the first flow path 4T, and the second flow path 4E of the identification device 1. are doing. Therefore, at the time of liquid type identification, the liquid to be measured in the liquid flow path 20 to be measured, including the liquid introduction path 24 to be measured, is not substantially forced to flow ideally.
- the switch 74 When the switch 74 is closed for a predetermined time (for example, 3 to 10 seconds; 4 seconds in FIG. 8) by a heater control signal output from the microcomputer 72 to the switch 74, the predetermined height of the heating element 21a4 is raised.
- a single pulse voltage P (for example, 10 V) is applied to cause the heating element to generate heat.
- the output voltage (sensor output) Q of the differential amplifier 70 gradually increases during application of the voltage to the heating element 21a4, and gradually decreases after the voltage application to the heating element 21a4, as shown in FIG. I do.
- the microcomputer 72 samples the sensor output for a predetermined number of times (for example, 256 times) for a predetermined time (for example, 0.1 second) before the start of voltage application to the heating element 21a4.
- the average initial voltage value VI is obtained by calculating the average value. This average initial voltage value VI corresponds to the initial temperature of the thermosensitive body 21a2.
- a first time (for example, 1Z2 or less of the application time of a single pulse, which is less than 0.1Z2, which is a relatively short time from the start of voltage application to the heating element).
- 5-1. 5 seconds; 1 second in Fig. 8 (Sensor output at the end of the first time) Is sampled a predetermined number of times (for example, 256 times), and an operation for taking the average value is performed to obtain an average first voltage value V2.
- This average first voltage value V2 corresponds to the first temperature at the time when the first time for applying a single pulse to the temperature sensing element 21a2 elapses.
- a second time for example, a single pulse application time; 4 seconds in FIG. 8 that is a relatively long time from the start of voltage application to the heating element has elapsed.
- the sensor output is sampled a predetermined number of times (for example, 256 times), and an average is calculated to obtain an average second voltage value V3.
- This average second voltage value V3 corresponds to the second temperature when a second time has elapsed since the start of the single pulse application to the temperature sensing element 21a2.
- part of the heat generated in the heating element 21a4 based on the voltage application of the single pulse as described above is transmitted to the temperature sensing element 21a2 via the liquid to be measured.
- this heat transfer There are two main forms of this heat transfer that differ depending on the time from the start of pulse application. That is, in the first stage within a relatively short time (eg, 1.5 seconds) from the start of pulse application, heat transfer is mainly conduction. On the other hand, in the second stage after the first stage, heat transfer is mainly dominated by natural convection. This is because in the second stage, natural convection occurs due to the liquid to be measured heated in the first stage, and the ratio of heat transfer thereby increases.
- the heat transfer by conduction in the first stage greatly depends on the thermal conductivity of the liquid to be measured.
- the heat transfer by natural convection in the second stage greatly depends on the kinematic viscosity of the liquid to be measured.
- Figure 9 shows the relationship.
- Figure 10 shows the relationship.
- the relationship between the temperature and the liquid type-corresponding first voltage value V01 for some known liquids to be measured (reference liquids to be measured) belonging to hydrocarbon liquids and alcohol liquids is described.
- the first calibration curve shown is obtained in advance, and this calibration curve is stored in the storage means of the microcomputer 72.
- An example of the first calibration curve is shown in FIG. In this example, a first calibration curve is created for reference liquids to be measured having thermal conductivity ⁇ of ⁇ 1 and ⁇ 2.
- the type of the liquid to be measured (here, the liquid In the identification by the first voltage value ⁇ , the type of the liquid to be measured is specified by the thermal conductivity; I) when identifying the liquid temperature from the temperature sensing element 22a2 of the liquid temperature detection unit 22.
- the output value T corresponding to the liquid temperature input through the amplifier 71 is also used.
- FIG. 12 shows an example of the output value T corresponding to the liquid temperature.
- Such a calibration curve is also stored in the storage means of the microcomputer 72.
- a temperature value is obtained from the liquid temperature corresponding output value T obtained for the liquid to be measured, using the calibration curve of FIG. Based on the obtained temperature values, next, in the first calibration curve of FIG. 11, the first voltage values V01 ( ⁇ 1; t), V01 ( ⁇ ) corresponding to the liquid type of each calibration curve corresponding to the temperature value t. 2; t). Then, ⁇ of the liquid type corresponding first voltage value V01 ( ⁇ ; ⁇ ) obtained for the liquid to be measured is converted to the liquid type corresponding first voltage value V01 ( ⁇ 1; ⁇ ), V0l (2 ; t) to determine. That is, based on ⁇ «, ⁇ 01 ( ⁇ ; ⁇ ), V01 ( ⁇ l; t), V01 ( ⁇ 2; t),
- the liquid type can be accurately and quickly (instantly) identified. Note that by using the liquid temperature-dependent output value T instead of the temperature as the first calibration curve in Fig. 11, the storage of the calibration curve in Fig. 12 and the conversion using this can also be omitted.
- the liquid to be measured is determined by determining the magnitude relationship between the obtained liquid type-corresponding first voltage value V01 and the boundary value Vs to determine whether the liquid to be measured is a hydrocarbon liquid or an alcohol liquid. It is possible to determine to which of these the two belong.
- FIG. 13 relates to a hydrocarbon-based liquid.
- a second calibration curve is created for reference liquids having kinematic viscosities V of V1 and V2.
- FIG. 14 relates to an alcohol-based liquid.
- a second calibration curve is created for reference liquids having kinematic viscosities V of V3 and V4.
- the second calibration curve in FIG. 13 is used in the following identification. If the liquid to be measured is determined to be an alcohol-based liquid by the above-described identification using the liquid type-corresponding first voltage value V01, the following calibration in FIG. Use lines.
- the type of the liquid to be measured (here In the identification by the liquid type-corresponding second voltage value V02, the type of the liquid to be measured is specified by the kinematic viscosity V).
- the above-mentioned liquid temperature corresponding output value T input via the detection amplifier 71 is also used.
- a temperature value is obtained from the output value T corresponding to the liquid temperature to be measured using the calibration curve in FIG. Let the obtained temperature value be t, and then, in the second calibration curve of FIG. 13 or FIG. 14, the liquid type-corresponding second voltage value V02 (vl; t) of each calibration curve corresponding to the temperature value t V02 (v2; t) or V02 (v3; t), V02 (v4; t) is obtained.
- VX of the liquid type corresponding second voltage value V02 x; t) obtained for the liquid to be measured is converted to the liquid type corresponding second voltage value V02 (V l; t), V02 ( V2; t) or V02 (v3; t) and V02 (v4; t) are determined by performing a proportional operation. That is, vx «, V01 (vx; t), V02 (V l; t), V02 (v 2; t) or (vx; t), V02 (v3; t), V02 (v4; t)
- the liquid type can be accurately and quickly (instantly) identified. Note that by using the liquid temperature corresponding output value T instead of the temperature as the second calibration curve in FIGS. 13 and 14, the storage of the calibration curve in FIG. 12 and the conversion using the same are omitted. Talk about things.
- a signal indicating the value of the liquid type (thermal conductivity ⁇ or kinematic viscosity V) obtained as described above is output via a D / A converter (not shown) to the output buffer circuit 76 shown in FIG. This is output as an analog output to the main computer (ECU), which controls combustion of the engine of the automobile (not shown).
- the analog output voltage value corresponding to the liquid temperature is also output to the main computer (ECU).
- the signals indicating the liquid type value and the liquid temperature value can be taken out as digital output as required, and can be input to a device that performs display, alarm, and other operations.
- the liquid to be measured around the liquid type detection unit fins 21c and the liquid temperature detection unit fins 22c is required to be as strong as possible based on external factors. From the viewpoint that it is preferable to suppress the flow, it is preferable to use a cover member 2d, particularly one having a vertical liquid introduction path to be measured. Note that the cover member 2d also functions as a protection member for preventing contact of foreign matter.
- the cover member 2d further improves the accuracy of liquid type identification when the inclination angle of the measuring unit 3, especially the identification sensor unit 2 with respect to the vertical direction changes, and when the cover member does not exist. It also has the function of improving. That is, if the cover member does not exist, The change in the form in which the heat generated from the heating element is transmitted to the thermosensitive body by the natural convection is large in response to the change in the temperature, the change in the second voltage value V02 corresponding to the liquid type of the same liquid to be measured is large. For this reason, the tilt angle range that does not cause confusion with the output value in the case of another type of liquid to be measured is relatively narrow.
- the cover member 2d when the cover member 2d is present, the change in the form in which the heat generated from the heating element is transmitted to the temperature sensing element by the natural convection with respect to the change in the inclination angle is small (ie, Natural convection is always mainly generated along the liquid introduction path in the cover member 2d). Therefore, the change of the second voltage value V02 corresponding to the liquid type of the same liquid to be measured is small.
- the tilt angle range that does not cause confusion with the output value of the liquid to be measured is relatively wide.
- the fuel to be supplied to the internal combustion engine is used as the fluid to be measured.
- the fluid to be measured is a hydrocarbon-based liquid or an alcohol-based liquid in another form. You can. Examples of such a form include a sample form for quality control of a petroleum plant or for analysis of hydrocarbon liquid and alcohol liquid in the environment. Further, the present invention can also be used as an apparatus for measuring the thermal conductivity and the kinematic viscosity of a hydrocarbon-based liquid and an alcohol-based liquid sample.
- FIG. 1 is a schematic configuration diagram showing a use state of an embodiment of a liquid type identification device according to the present invention.
- FIG. 2 is a partial cross-sectional view of the liquid type identification device of FIG. 1.
- FIG. 3 is a partial cross-sectional view of the liquid type identification device of FIG. 1.
- FIG. 4 is a partial cross-sectional view of the liquid type identification device of FIG. 1.
- FIG. 5 is a sectional view of an indirectly heated liquid type detection unit.
- FIG. 6 is an exploded perspective view of a thin film chip of the indirectly heated liquid type detection unit.
- FIG. 7 is a configuration diagram of a circuit for identifying a liquid type.
- FIG. 8 is a diagram showing a relationship between a single pulse voltage P applied to a heating element and a sensor output Q.
- FIG. 9 is a diagram showing a relationship between a liquid type-corresponding first voltage value V01 and the thermal conductivity of the liquid to be measured.
- FIG. 10 is a diagram showing the relationship between the liquid type-corresponding second voltage value V02 and the kinematic viscosity of the liquid to be measured.
- Garden 11 is a diagram showing an example of a first calibration curve.
- Fig. 12 is a diagram showing an example of a liquid temperature corresponding output value T.
- Garden 13 is a diagram showing an example of a second calibration curve.
- Garden 14 is a diagram showing an example of a second calibration curve.
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- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT05704072T ATE468530T1 (de) | 2004-01-30 | 2005-01-25 | Vorrichtung zur identifizierung von flüssigkeitsarten |
US10/586,920 US7493802B2 (en) | 2004-01-30 | 2005-01-25 | Liquid type identification device |
DE602005021313T DE602005021313D1 (de) | 2004-01-30 | 2005-01-25 | Vorrichtung zur identifizierung von flüssigkeitsarten |
EP05704072A EP1715330B1 (en) | 2004-01-30 | 2005-01-25 | Liquid type identification device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-023645 | 2004-01-30 | ||
JP2004023645A JP3987041B2 (ja) | 2004-01-30 | 2004-01-30 | 液種識別装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005073700A1 true WO2005073700A1 (ja) | 2005-08-11 |
Family
ID=34823879
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/000894 WO2005073700A1 (ja) | 2004-01-30 | 2005-01-25 | 液種識別装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7493802B2 (ja) |
EP (1) | EP1715330B1 (ja) |
JP (1) | JP3987041B2 (ja) |
AT (1) | ATE468530T1 (ja) |
DE (1) | DE602005021313D1 (ja) |
WO (1) | WO2005073700A1 (ja) |
Families Citing this family (11)
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JP4038492B2 (ja) | 2004-05-28 | 2008-01-23 | 三井金属鉱業株式会社 | 液種識別方法及び液種識別装置 |
JP2007155502A (ja) * | 2005-12-05 | 2007-06-21 | Ricoh Co Ltd | 検出器 |
WO2008036630A2 (en) * | 2006-09-18 | 2008-03-27 | Howard Lutnick | Products and processes for analyzing octane content |
JP2010025628A (ja) * | 2008-07-16 | 2010-02-04 | Mitsui Mining & Smelting Co Ltd | 流体識別方法および流体識別装置 |
US8627858B2 (en) * | 2009-03-12 | 2014-01-14 | Ford Global Technologies, Llc | Methods and systems for selectively fuelling a vehicle |
US8539938B2 (en) | 2009-03-12 | 2013-09-24 | Ford Global Technologies, Llc | Fuel systems and methods for controlling fuel systems in a vehicle with multiple fuel tanks |
ITMI20111313A1 (it) * | 2011-07-14 | 2013-01-15 | Carpigiani Group Ali Spa | Macchina per preparazione di gelato |
CN105203580A (zh) * | 2015-09-28 | 2015-12-30 | 安徽神剑新材料股份有限公司 | 粉末涂料胶化检测加热机构 |
FR3056012B1 (fr) * | 2016-09-15 | 2018-09-28 | Sncf Mobilites | Dispositif de detection de circulation de liquide pour transformateur immerge |
JP2020148684A (ja) * | 2019-03-14 | 2020-09-17 | オムロン株式会社 | 流量測定装置、流量測定装置を備えたガスメータ及び、ガスメータのための流量測定装置ユニット |
CN112763539B (zh) * | 2020-12-25 | 2023-11-07 | 北京航星机器制造有限公司 | 一种金属容器内液体的检测装置及检测方法 |
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JPH0533712Y2 (ja) * | 1987-09-22 | 1993-08-26 | ||
JPH11237356A (ja) * | 1998-02-19 | 1999-08-31 | Mitsui Mining & Smelting Co Ltd | 流体識別方法及び流体識別装置 |
JP2001004422A (ja) * | 1999-06-24 | 2001-01-12 | Mitsui Mining & Smelting Co Ltd | 流体識別機能を有する流量センサー |
JP2004101385A (ja) * | 2002-09-10 | 2004-04-02 | Mitsui Mining & Smelting Co Ltd | ガソリンの液種識別装置およびガソリンの液種識別方法 |
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JPH11153561A (ja) | 1997-11-21 | 1999-06-08 | Mitsui Mining & Smelting Co Ltd | 流体識別方法及び流体識別装置 |
JP4038492B2 (ja) * | 2004-05-28 | 2008-01-23 | 三井金属鉱業株式会社 | 液種識別方法及び液種識別装置 |
JP4188287B2 (ja) * | 2004-07-15 | 2008-11-26 | 三井金属鉱業株式会社 | 熱式センサ及びそれを用いた測定装置 |
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2004
- 2004-01-30 JP JP2004023645A patent/JP3987041B2/ja not_active Expired - Lifetime
-
2005
- 2005-01-25 WO PCT/JP2005/000894 patent/WO2005073700A1/ja active Application Filing
- 2005-01-25 DE DE602005021313T patent/DE602005021313D1/de active Active
- 2005-01-25 US US10/586,920 patent/US7493802B2/en active Active
- 2005-01-25 AT AT05704072T patent/ATE468530T1/de not_active IP Right Cessation
- 2005-01-25 EP EP05704072A patent/EP1715330B1/en active Active
Patent Citations (6)
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JPH0533712Y2 (ja) * | 1987-09-22 | 1993-08-26 | ||
JPH04178550A (ja) * | 1990-11-14 | 1992-06-25 | Hitachi Ltd | 熱式燃料性状センサ |
JPH11237356A (ja) * | 1998-02-19 | 1999-08-31 | Mitsui Mining & Smelting Co Ltd | 流体識別方法及び流体識別装置 |
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Also Published As
Publication number | Publication date |
---|---|
EP1715330A1 (en) | 2006-10-25 |
EP1715330A4 (en) | 2007-05-23 |
US7493802B2 (en) | 2009-02-24 |
JP3987041B2 (ja) | 2007-10-03 |
DE602005021313D1 (de) | 2010-07-01 |
EP1715330B1 (en) | 2010-05-19 |
ATE468530T1 (de) | 2010-06-15 |
JP2005214856A (ja) | 2005-08-11 |
US20070151331A1 (en) | 2007-07-05 |
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