• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A densitometer for measuring a concentration of matter in a fluid system comprised of liquids and suspended and/or floating matter such as, for example, a densitometer for measuring the concentration of oil in bilge water that includes suspended and/or floating solid material. Two emulsifying conditions of the system are produced by first emulsification with a relatively high power emulsifying action and then a relatively low power emulsification. The amount of light which penetrates the system is a function of the turbidity which varies with the intensity of the emulsification. The concentration of oil in water, for example, in bilge water, is a function of the ratio of the amount of light which passes through the system in the two turbid states.
    公开号:SU948299A3
    申请号:SU772474252
    申请日:1977-04-20
    公开日:1982-07-30
    发明作者:Окада Мицуеси；Сато Такехико；Окуно Тецуя；Сима Масао
    申请人:Яматаке-Ханивелл Ко,Лтд (Фирма)；
    IPC主号:
    专利说明:

      . one . :
    The invention relates to engineering. measurements of parak ((esters of liquid, contents of solid particles, and can be used in densitometers with for measuring the concentration of such solid particles in a liquid, whose diameters can vary depending on the work of eg-1ulsifier |
    Densitometers are known for measuring the concentration of solid particles in a liquid medium containing a light source, a photodetector, and a 1: recording:
    However, since particles of a sample jg of a liquid medium are randomly distributed in it, it is difficult to accurately measure the concentration or turbidity of the sample.
    To eliminate this shortcoming, the sample of the liquid medium is agitated using an ultrasonic emulsifier so as to obtain a uniform distribution of the particles and then optically measure the concentration 25 or the turbidity of the sample of the liquid medium.
    The closest to the proposed technical essence is a densitometer containing an optically coupled light source,
    a cell with an ultrasonic emulsification: a torus, a photodetector, as well as the first computational circuit with two inputs, a transformation and recording circuit, a switch installed between the ultrasonic emulsifier and the first computational circuit 2J.
    The known densitometer has low accuracy, since it lacks the means for normalizing the measured value of turbidity or concentration.
    The purpose of the invention is to improve the measurement accuracy.
    权利要求:
    Claims (2)
    [1]
    This goal is achieved by the fact that a known densitometer containing an optically coupled light source, a cell with an ultrasonic emulsifier, a photodetector, as well as a series-connected amplifier, filter, is the first computational one; a circuit with two inputs, a conversion and registration circuit, a switch; that is installed between the ultrasonic emulsifier and the first computational circuit, a synchronization circuit is introduced with a switch containing pulse shaping circuits, an inverter, two relay gates for one-way circuits, and a second calculus a circuit containing two gating strobe blocks each, an adder at the output of which a divider is installed, while in the synchronization circuit the output of the pulse shaping circuit is connected to the input of a single relay second circuit through an inverter, yet. with the other input - directly, the outputs of the relay circuits are connected with the first inputs of the gating circuits and the inputs of the one-pass circuits, the second inputs of the gating circuits are connected to the filter output, and the outputs of the gating circuits are connected to the inputs of the first computational circuit, and the outputs of one travel circuit are connected to the first inputs gating circuits of the second computational circuit; second inputs of the gating circuits of the second computational circuit. connected to the output of the first computation circuit; outputs of the gating circuits of the second computation circuit; dineny blocking circuits to the inputs of the second computing circuit whose outputs are connected to adder inputs of the second computing circuit, and the output of the adder Cpd nen divider to the input conversion scheme. FIG. 1 is a block diagram of a densitometer. With a flow cell and an ultrasonic emulsifier; FIG. 2 is a block diagram of the electronic part of the densitometer; FIG. 3 shows some characteristic signals in the operation of the densitometer in FIGS. 4 and 5 of the block diagram of the variants of the first calculating circuit; FIG. 6 — working characteristic curves of a densitometer; in fig. 7 and 8 - other cells (cuvettes) that can be used with in a densitometer. The densitometer contains a cylindrical optical cell 1, made of glass (fig,), through which the emulsified liquid sample passes. One fluid sample contains petroleum products whose particle diameter is small, while the other fluid sample contains petroleum products whose particle diameter is large. The light emitted by the source 2, which is a xeroi lamp, falls on the collimator 3, which is designed to convert a light beam into a parallel beam that passes through the optical cell 1, and is detected by the photoelectric receiver 4. An electrical energy of two quantities is applied to the ultrasonic-type emulsifier 5 , thus creating two streams of liquid A and B, shifted in time. Moreover, the sample of liquid A contains particles of small diameter, and the sample of liquid B contains particles of larger diameter. Electrical energy is applied to the ultrasonic emulsifier 5 periodically through switch 6 from sources 7 and 8 of electrical energy. Switch b is triggered by generator signals 9, which is turned on and off at a constant frequency. Sources 7 and 8 of high and low electric energy excite a magnetostrictor 10. Ultrasonic emulsifier 5 is equipped with a channel. 11, through which cooling water is supplied to the magnetostrictor 10 to prevent the latter from overheating. The oscillations created by the magnetostrictor 10 are transmitted to the radiating body 12, which is located in; contact with liquid mixed with oil. The test fluid (water) is fed through conduit 13 and a gap between the inclined conduit 14 for the convergence of the liquid and the radiating body 12 into the cavity 15 in which the water sample is subjected to secondary emulsification and then continuously fed into the optical cell 1. Between the radiating body 12 and a cavity 15 is inserted into a thin membrane 16, which serves to pre-emulsify a fluid sample. The sample feed tube 17 is pumped at a rate of nqc. With the help of a knife 18, an oil squeeze fluid is drawn from a main pipeline (not shown). This fluid is then piped to the emulsifier 5, as a result of which a fluid sample A is generated, excited by high-level electrical energy and a fluid sample B, excited by low-level electrical energy Pfj, which alternately passes through the optical cell 1. Fluid samples L and B illuminated with monochromatic light passing through the optical cell 1, and hit the electrovacuum photodetector 4, the output of which is amplified by amplifier 19 and then fed to the first computational the circuit 20, to which the synchronization signal from the switch also arrives, b through the synchronous switch 21 and the circuit 22 of processing the synchronizing signal. The synchronous switch 21 and the toggle switch 6 are activated by the output signals of the generator 9. The first computing circuit 20 calculates the logarithm of the change of two turbidity signals obtained using electrical energies of different levels. In order to know the true oil concentration, the output signal of the first computational circuit 20 is fed to a second computational circuit 23, which calculates the average value of the output signals from the first computational circuit 20. The output signal proportional to the concentration of particles in the liquid is indicated through signal to the device. 25 records (recorder), which records the measured concentration signal. FIG. 2 shows an amplifier 26, a filter 27, a computational circuit 20, a blocking circuit division circuit 30, a logarithmic transformation circuit 31, and a multiplication circuit 32 of circuit 28 and 29. The second computational circuit 23 includes a gate circuit 33, the first inputs of which are connected to the output of the first computational circuit 20, and the outputs are connected to the locking circuits 34 and 35, the outputs of KOTOpfcJx are connected through resistances to an adder 36 The output of the adder 36 is connected via a divider 37 with an input to a conversion circuit 24, consisting of a summing circuit 38 and a voltage-current conversion circuit 39. The synchronization circuit 22 consists of a switch 21 located in front of the input of the pulse shaping circuit 40 j operating from the switch 21. The output of the pulse shaping circuit 40 is connected to the inputs of two relay circuits 41 and 42, and to one of them the connection is made via an inverter 43, and the other is not worthwhile. The outputs of the relay circuits 41 and 42 are connected to the first 1 "1 and inputs of the gate circuits 44 and 45, the second inputs of which are connected to the output of the filter 27. In turn, the outputs of the relay circuits are additionally connected to the input of the one-way circuit 46 47 whose outputs are connected to - the second inputs of the gating circuits 33 of the second computational circuit 2-3. Figures 4 and 5 show various versions of the first computational circuit 20, where, respectively, 48 is a logarithmic ratio scheme, 49 and iSO are preamplifiers, 5. and 52 are logE rhymic converters. FIG. 7 and 8 show variations of flow cells 53 and 54 for dual-beam optical measuring circuits, remote control 55, playing the role of a divider and modulator, mirror 56-59 and cells 60 and 61. The densitometer works as follows. If the oily liquid supplied by the pump 18 under constant pressure is influenced by electrical energy with a high level of P-t, then during the initial period the Oil particle is divided into a large number of small particles. In this case, the light passing through the optical ggcell will cross a large number of particles. As a result, the intensity of the transmitted light perceived by the photodetector 4, through t. The seconds are reduced from the first state of It (1) to the next steady state of It (1). Then, a low-level electrical energy P from source 8 to the emulsifier 5 is supplied by a toggle switch 6. As a result, the oil particle is dispersed into. particles with a relatively larger diameter compared to a particle of oil dispersed in a liquid under the action of high-level electrical energy P from source 7. As a result, after t "2 seconds, the intensity of the transmitted light becomes more and more and reaches the following stable state Nor It (2). In this case, a time delay is created between the signals, while maintaining the relation t. ,, ti2 to. For changes of x, the condition of equality of switching periods of energy levels 5 5 (2 S, which are equal to 3 s) is used. If the concentrations of oil in water are known, then the light intensity changes in waves between It and It. Let the concentration of oil be X, and the concentration - i of the pensed solids is y, then the intensity It (x) and lt (x) of the light that has passed through the cuvette is cor --- (Ld: ,,. It (x) K-1o-g-10, (1). ItCx) K-IO- -IO-: (2). Where d and oi are the coefficients proportional to the articulum, estimating the degree of emulsification of samples A and B / K and K, the parameters determined by contaminated cells (cell) or the color of a liquid sample, (i and p are the proportionality coefficients determined by the configuration of gly suspended particles; IQ intensity of the padak light. Parameters K and K depend on the quality of the optical cell 1 through which the passage t samples of liquid A and B. The proportionality coefficients ft ftV determined by σ. suspended solid particles y, essentially K K, E E. The coefficients of proportionality and ct indicate: the difference between emulsification, respectively, when exposed to electric energy of high and low levels of P, Pij. The ratio between two I4K values of the light emission intensities It (x) and It (x) can be determined from equations (1) and (2): | ..t (x) 10 Tt {xy. Thus, where lo1 d. - oL. If the degree of emulsification of the oil is achieved by the electrical energy supplied to the emulsifier 5, is set and adjusted by a known amount in advance, then the coefficients of proportionality, .uku. The above figures are known values. In this case, two samples, emulsified states which differ between each other, the ratio between the two measured light intensities, It (y) and It (x), can be determined and the oil concentration can be easily measured. - :. When the switch 21 is closed, the synchronizing signal in the circuit 39 (figure 2) is energized. This signal arrives at the pulse-shaping circuits 41 and 42, with THIS at the circuit 41 the synchronization signal is received through the inverter 43, and at the circuit 42 directly, the Circuits 41 and 42 generate pulses of a given duration with delay S t. Received light signals of intensity It, It pass through amplifier 26 and filter 2 to gate circuits 44 and 45, respectively, simultaneously with synchronizing pulses from circuits 41 and 4. Synchronization signals also go through one-way circuits 46 and 47 to gate inputs 33 second. computational circuit 23. Formed circuits 44 and 45 pulse signals arrive at the inputs of the locking circuits 28 and 29 of the first computation circuit 20. The one-way circuits 46 and 47 delay the electrical signals proportional to It It 5 for 50 ms. The first computational circuit 20 analyzes both signals carrying information about the concentration of the sample and resulting from the emulsification of the sample with two levels of electrical energy. These signals are sent far to the separator cxer / iy 30, the signal from which is fed to the logarithmic converter 31 and then the a-multiplication circuit 32. The V / W circuit 32 multiplies the signal by 1 / do1 according to equation (3) and gives a scale of concentrations ranging from 0 to 200 V consistent with the voltage scale, ft O to 4 V. Thus, this scheme performs the scaling operation. The signals from the first computational circuit 20 are fed to the inputs of the gating circuits 33. The second inputs of these circuits receive periodic pulsed synchronization signals from the circuit 2-
    [2]
    2. From the outputs of the gating circuits 33 (the signals are fed to the locking circuits 34 and 35. The alternating circuits 34 and 35 are operated by the synchronization circuit 22, which introduces the computation circuits 20 and 23 to the synchronous operating mode. The output signals from the circuits 34 and .35 are fed through resistors (not indicated) to the input of the summing circuit of the circuit 36, which functions as a filter. The output signal of the summing circuit is divided by a half divider 37. The summing circuit 38 is equipped with an amplifier, to which the output signal is supplied; from 0 to 4 V and for example displacement Offsets (not shown). The output signal from summing circuit 38 is fed to voltage-to-current circuit 39 and converted to a 4 to 20 mA signal. JUiH better understanding of the processing circuit, the parameter K, the coefficient and light intensity IQ are respectively K 1, t 1, 1 (3 - 10. Fig. B shows the characteristic curves of different parts of the turbidity signal processing circuit when the concentration of the fluid sample changes as a function of time. If the concentration of the fluid sample increases, then the photoelectric current has the shape shown in FIG. On figa the envelope shape It corresponds to the perceived intensity at the moment when-. emulsifier 5 is excited by low-level electrical energy, and the shape of the envelope It corresponds to intensity when emulsification 5 is excited by high-level electrical energy. The magnitude of the measured signal is amplified by the amplifier 26. If the high-level electrical energy, the exciting emulsifier-5, is changed to low-level electrical energy, the excitation occurs after a period of delay of the peak value It (1) of the corresponding concentration. Since the emulsifier. 5 is excited by low-level electric energy, the intensity of the incident light reaches the envelope value It. Cher: the gap S with the intensity of the perceived light reaches the envelope value It. At this moment, the circuit goes to the conducting state and the peak value It (1) is delayed by the capacitor of the blocking circuit 29. Then the emulsifier 5 is energized again with high-level electrical energy, the intensity of the incoming light reaches the value It (2), and the circuit becomes conductive again, and the peak value of the Itdinka It (2) is delayed. These operations are repeated during the process. As shown in FIG. Bb, the blocking circuit 28 samples the peak values It (1) It G), It (3) .., every 2S s, and the It signal blocking chip 29 delays the peak values It (1), It C2), It (3) ... The output signals from the blocking circuits 28 and 29 are fed through a dividing circuit 30 and a logarithmic conversion circuit to a multiplication circuit 32. As a result, the output of the first computational circuit 20 produces a signal x of oil functions of the time interval S, (Fig.bs). . . -. , jf 401010, JLgdcs t Ad jiia), f 3V (g) (Hsch5) ...... (4) Fig, bs shows changes in the concentration of a sample of a liquid. The C-shaped rapid change in signal results in a square waveform with a large amplitude, which makes it difficult to isolate the true concentration. In the case of a slowly varying liquid sample signal, the output signal of the first computational circuit 20 may be Tg; via the Conversion Circuit 24, mine the second computational circuit 3 to regs. RATOR 25, which shows go. Records the measured concentration. Generally, when measuring a fast or cty foam-changing co-center sample of a liquid, the output signal of the first computational circuit 20 is fed to a second computational circuit 23, which averages the signal of the concentration obtained by the first computational circuit 20, which is due to the fact that the filter harperstest the adder is selected in such a way as to obtain by calculating the true signal of the concentration bench. The gate circuit 33 of the second computational circuit 23 alternately supplies the output signal from the first computational circuit 20 every S sec to the blocking circuits. In this case, the gate pulse of the valve circuits is about 10 ms and the output signal of the one-pass circuits is a value in the order of 50 ms. These gate signals and output pulses simultaneously appear and are fed to the first and j second computational circuits 20 and 23, respectively. As a result, the concentrations of oil, defined by equation (4), are distributed to each of the locking schemes 34 and 35 of the second calculation scheme every 2 seconds: signal blocking scheme), x {3), x (5), x (7 ) v ..;, blocking signal (2), xC4), x (6), x (8). ... In the summing circuit 36 two output signals from the circuits 34 and 35; SunFet interlocks. In this case, the output signal of the summing circuit is fed back through a resistor: and the capacitor to the inverter input of the amplifier converts the summing circuit 36 to a filter mode having a time constant (which is approximately 3 seconds. This completes the averaging operation signal by a second computational circuit 23. Such an averaging operation causes the appearance of output signals at the output of a second computational circuit 23, which follow rapid changes in the concentration of oil (fng.6d). Since the summing circuit 36 acts as a filter, the true value of the oil concentration is recorded. In order to match the transmission of the output signal of the first and second computational cxei-i 20 and 23 to the indicator, a reference voltage is added to the summing circuit of the signal conversion circuit 24 bias schemes and voltage-current conversion schemes (not shown). Signal processing systems for turbidity concentration (computational schemes) can be different. For example, in Fig. 4, another variant of the first computational circuit 20 is shown; The output signal from the photodetector 4 i is applied via amplifier 19 to a logarithmic conversion circuit 31, which converts the input signal into a signal proportional to the logarithm. The synchronization signal processing circuit 22 is driven by a toggle switch 21, i which controls the locking circuits 34 and 35. Then, both log log and log It are applied to a subtraction circuit (not shown), the output signal of which is applied to the second computational circuit. 23. FIG. 7 and 8, two modified versions of the design of the optical cell f in FIG. 7 shows optical cells connected in parallel, but in FIG. 8 - optical cells connected in series. In Fig. 7, both optical cells: 53 and 54 are equipped with discharge tubes 13. These discharge tubes are connected to pipeline 17. Transmitted light beams of So and Se, previous, through an emulsified sample of liquids A and B, are measured by an optical system. . ; In the optical system, the light emitted by the source 2 is divided by a mirror 55 into two light beams which are directed by two rigidly mounted mirrors 56 and 57 into optical cells 53 and 54. The light beams that pass through the optical cells fall onto other rigidly mounted mixing mirrors 58 and 59 and, reflecting from them, a padshat on / photocell 4, which detects the Sci and SB light lines. In this embodiment of the densitometer, the tamper circuits 20 and 23 are controlled by synchronizing signals obtained from the rotary mirror 55. If the mirror 55 rotates at high speed, then the second computational circuit 23 can be omitted. In FIG. 8 shows emulsifiers 5, optical cells 0 and 61 / Connected in series. Optic cells 60 and 61 are parallel to each other. Light radiation, non eittmie from two sources of light, falls on optical cells and light passing through them from the radiation So. and. S6 falls on photovoltaic cells that operate autonomously. Thus, the proposed densitometer with various types of computational schemes allows to increase the measurement accuracy. Densitometer containing optically coupled light source, cell with ultrasound emulsifier. Photo receiver, as well as series-connected amplifier, filter, first computational circuit with two i
    000
    I inputs, conversion and registration circuits, a switch installed between the ultrasonic emulsifier and the first computational circuit, characterized in that, in order to improve the measurement accuracy, a synchronization circuit with a switch 4, containing pulse shaping circuits, an inverter, two relays, gates and one-pass circuits, and the second computational circuit, containing two gating circuits each blocking the circuits, an adder, at the output of which a divider is installed, while in the synchronous circuit tion pulse forming output Scheme connected to the input by one to relay circuit through an inverter, and to the input of the other - directly outputs releynlh circuits are connected to first inputs of circuits and strsbirukidih vhodash1 bdnohodovyh circuits second inputs. gating circuits are connected to the output of the filter, and the outputs of gating circuits are soy; g (inen1 with the inputs of the first computational circuit, the outputs of one-pass circuits are connected to the first inputs of the gating circuits of the second computational circuit, the second inputs of the gating circuits of the second computational circuit are connected; the circuits, the outputs of the old circuitry of the second computational circuit are connected to the inputs of the blocking circuits of the second computational circuit, the outputs of which are connected to the inputs of the adder of the second computational circuit, output divisor of the adder is connected to the input of the conversion circuit. Sources of information taken into account during the examination 1.US Patent No. 3704950, Cl, 356-73, published 1972. 2, US Patent No. 5704950,; Cl G 01 J 1/04, published 1975 (prototype).
    -and-11i Ji
     . WG 3 JJ T7
     Jtd) L (r) Jfd) lifs) ltY3} jif ")
    figs
    li
    TO
    yf
    JP
    0uf.S
    fffOPPm
    L
    . "
    Ш1
    ffPPm fBOPPm
    Xfj)
    x (o) xft) x (g)
     Th
    Oppr
    -.Tri
    JO
    fOV
    je (x)
    7.27
    7.ff "
    n (x)
    383
    0 10
    70C
     ifM
      3fO
    , toy I
    wgo
    еЧ.5гfO5.959J3
    one
     gg SHZ -
    It {X)
    Jtm
    (3.4 b.Sh.№
    1 um
    -T-i.
    r.m
    SJ
     t f J I
    fi / jj
    If
    W
    FIG.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU948299A3|1982-07-30|Densimeter
    US3761724A|1973-09-25|Double beam hydrocarbon gas detector
    US5301014A|1994-04-05|Method and arrangement for spectroscopically measuring the concentration of a component of a gas sample
    EP0515211A2|1992-11-25|Apparatus and method for phase resolved fluorescence lifetimes of independent and varying amplitude pulses
    US3766048A|1973-10-16|Analysis of polymer mixtures in solution utilizing electrophoretic light scattering apparatus
    GB2295670A|1996-06-05|Measuring flow vectors in gas flows
    JPH0621862B2|1994-03-23|Ocean laser observation system using multi-phenomenon simultaneous photometry
    JPH0324438A|1991-02-01|Method of detecting deterioration of engine oil
    ES8207348A1|1982-09-01|A method and apparatus for the detection of impurities in a liquid such as blood.
    JPS60164227A|1985-08-27|Temperature detecting method
    SU888667A1|1982-08-15|Device for measuring water absorption ratio
    JPS5582068A|1980-06-20|Measuring unit for water depth using laser
    RU1782118C|1995-07-20|Adsorption method of determination of concentration of substances
    JPS62100642A|1987-05-11|Particle analyzer
    RU1807347C|1993-04-07|Hephelometer
    SU1550332A1|1990-03-15|Spectral method of determining concentration of substances
    JPS60205335A|1985-10-16|Sheath flow cell device
    JPS61173138A|1986-08-04|Method for measuring immune reaction by intensity fluctuation of light
    SU1453184A1|1989-01-23|Photometric petroleum consistency meter
    JPS6258139A|1987-03-13|Method and apparatus for measuring particle
    FR2577675A1|1986-08-22|INSTRUMENT FOR MEASURING FLUORESCENCE PRODUCED IN AN X-RAY EXCITED SAMPLE
    RU2293336C2|2007-02-10|Method of determination of ship's speed and device for realization of this method
    Hanson et al.1984|Laser based diagnostics for flowfield measurements
    SU934241A1|1982-06-07|Absoption meter
    RU1804608C|1993-03-23|Method of determining speed and dimensions of particles in moving medium
    同族专利:
    公开号 | 公开日
    JPS5534378B2|1980-09-06|
    GB1575133A|1980-09-17|
    SE7703596L|1978-05-13|
    US4102177A|1978-07-25|
    DE2715118A1|1978-05-18|
    DE2715118C2|1985-05-15|
    SE432307B|1984-03-26|
    NL7703808A|1978-05-17|
    JPS5361392A|1978-06-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3478578A|1967-05-15|1969-11-18|Exxon Research Engineering Co|Device for measuring the effect of surface active materials on emulsified water retention by jet fuels|
    FR2208527A6|1972-11-24|1974-06-21|Perieres Jacques|
    GB1440558A|1974-04-08|1976-06-23|Richter Gedeon Vegyeszet|Heterocyclic fused benzimidazoles|JPS5847401B2|1978-05-23|1983-10-22|Nippon Zeon Co|
    FR2456949B1|1979-02-08|1986-04-04|Etude Realisa Equip Speciaux|OPTICAL METHODS AND DEVICES FOR MEASURING THE QUANTITY OF OPAQUE IMPURITIES OTHER THAN HYDROCARBONS SUSPENDED IN A LIQUID AND APPLICATION TO THE OPTICAL MEASUREMENT OF HYDROCARBON CONTENT|
    JPS639616B2|1981-07-13|1988-03-01|Hitachi Ltd|
    JPS5825246U|1981-08-13|1983-02-17|
    JPS59170747A|1983-03-17|1984-09-27|Tokyo Keiki Co Ltd|Concentration meter of oil content|
    FR2543682B1|1983-03-31|1985-08-09|Guigues Frederic|METHODS AND APPARATUSES FOR OPTICALLY AND CONTINUOUSLY MEASURING THE HYDROCARBON CONTENT OF A LIQUID|
    DE3406176A1|1983-04-28|1984-10-31|Philips Patentverwaltung Gmbh, 2000 Hamburg|ARRANGEMENT FOR CHECKING A LIQUID FOR INGREDIENTS|
    US4809543A|1987-09-25|1989-03-07|Atlantic Richfield Company|Apparatus and method for monitoring one liquid in another|
    JPH01144849U|1989-03-01|1989-10-04|
    CA2062757C|1989-07-10|1999-12-14|Gerdt Heinrich Fladda|Measuring apparatus and method|
    US5208064A|1991-11-04|1993-05-04|Nordson Corporation|Method and apparatus for optically monitoring and controlling a moving fiber of material|
    US5370905A|1992-03-23|1994-12-06|Nordson Corporation|Method of applying priming coating materials onto glass elements of vehicles|
    US5277927A|1992-03-23|1994-01-11|Nordson Corporation|Method of applying primers onto glass elements of vehicles|
    US5602533A|1993-10-04|1997-02-11|Boverio; Antonello|Device for sensing a state change in a mechanical system, method for monitoring the state of a mechanical system and use of said device|
    US5591901A|1994-04-13|1997-01-07|Ryland Engineering Corporation|Fluid sensor|
    CA2195555C|1994-07-22|2005-08-16|Christiaan Charles Johannes Van Deelen|A method and apparatus for determining the concentration of a first fluid which is finely divided in a second fluid|
    DK171153B1|1995-02-10|1996-07-01|Slagteriernes Forskningsinst|Process and plant by mixing a non-uniform, flowable food, feed or pharmaceutical material and sampling device|
    US20070017277A1|2005-07-12|2007-01-25|Francisco Edward E Jr|Apparatus and method for measuring fluid density|
    US20070017278A1|2005-07-12|2007-01-25|Francisco Edward E Jr|Apparatus and method for measuring fluid density|
    JP2007155372A|2005-12-01|2007-06-21|Miura Co Ltd|Optical measuring instrument|
    DE202014104059U1|2014-08-29|2015-12-06|KDT Kompressoren- und Drucklufttechnik GmbH|Measuring device for measuring the concentration of oil and fuel contaminants in aqueous solution and compressed air system with such a measuring device|
    EP3150996A1|2015-10-02|2017-04-05|Hach Company|Apparatus and method for determining a water hardness value|
    CN105466754A|2015-11-20|2016-04-06|力合科技（湖南）股份有限公司|Water sample pretreatment method and device thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP13672676A|JPS5534378B2|1976-11-12|1976-11-12|
    [返回顶部]