DE1930985U - DEVICE FOR MEASURING THE FLOW OF CURRENT MEDIA. - Google Patents

Description

lnaelder: CONTACTROL LIMITED, Harrietshaa / England

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mmmng ε consoles of the media

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Me invention relates to a Meßrerfahren for DurchfluSeessong flowing media. Aasserdea are devices used to carry out the driving. "" ■■ ·· .'- ■■■■

Zar BurchflttSaessung tos gaseous or liquid media and the most diverse measuring methods are already known. Tangible MeßTerfahren a Torbekannten is a pipe through which flows the su aessende Medios, narrowed by the installation of a Drosseleteile so that gate and beyond the restrictor "in Druekiifferenz occurs · piping pressure difference can see old Eilfe eiaee Show DruckaeSinstruments and the flowing amount proportional . The main part of this

Measurement method as well as a great look! similar procedures It can be seen that the electrical output variable desired as a measured variable is not »with simple structural means

Il _A ": can be obtained. \ _; ^ -.- ... ■ - · ". ·

An essential subject of the Irfindang is to be seen in the "ice procedure" or the rotary raft measurement day to be specified, which enables an improved mode of operation of the drive machines in vehicles, automobiles or boats. In a further excluded: _i: you can etaltung Srfindung the aurück- per consumption unit

If - '- * "■ laid path can be indicated directly, whereby a

Maintain favorable operating conditions of the drive machine.

Bas lenneeiehnende Her present invention is to be seen in that the flowing medium is eye performs a predetermined amount of heat "and that the BurchflttBmeüge is bestiaat aas the resaltierenden temperature rise lie application of the measuring method is not limited directly to flössige οάατ gaseous fuels, but may be generally in the pouring media ä done & r various kinds * Faeh the basic Il - * principle the flowing medium is at a specific location

in the flow path company, and the temperature increase measured by a temperature sensor element located in the direction of flow behind the SS era source serves as the basis for the proof or the display of the flowing amount per Time unit «

Bern flowing Medios can be supplied to both a constant amount of heat, as a aueh lärmeaenge which on further system size, in the measurement bei8pielsweise <ker consumption

The amount of fuel in a prime mover is related to the driving speed depends. In the latter case, the temperature increase proportional to the miles fro gallon or liloaeter per liter of power of the vehicle. The scale of the Display instrument, which shows the rise in temperature, can be divided directly into associated consumption units for this purpose being.

A device for carrying out the process can see gates, that in one a in the flow path of what is to be eaten Mediam's lying messeleaent has at least one heating element as well a tea temperature sensor element are arranged, the feape- The temperature sensor element is connected to a per se known display limit la connection «Ia of a preferred embodiment form is a tea temperature sensor element in front and another tea temperature sensor element arranged behind the Eeizeleaent so that _ _ Inlet temperature τογ of the heat supply and at The temperature increase is displayed on the following tea temperature sensor element can be taken into account.

To implement the invention can be tubular in elaea MeSeleoent «two temperature sensor elements know a fall resistance be arranged, the electrical line connections liquid-tight aas the ffsadteil of the measuring tube are led out and are in connection with external connection means, for example in the form of a connector element. The ieSrohr τοη of a likewise Rohrföraigea is twofold Schatzgehäase surrounded, the measuring tube with a flange is clamped between a band flange of the protective housing and a cover tube. Ror in the direction of the flow the measuring tube can be a part of the gate with several distribution channels

are nebmangen Terseheaes Züführangsstüek, reached by las flowing medium in the free interior of leSronres ge ~ * The arrangement of sound-proof housing and the measuring tube is Torteilkaft coaxially * las Seaamtgertt is expediently wtts one or aehreren units, wherein the actual MeSteil containing MeS-tube with protective housing . This protective housing can contain coaxial drill bodies with an interposed insulating piece: and it has a recess which houses an electrical heating element, furthermore an electrical temperature sensor element behind the heating element, the electrical lines of the heating element and the temperature sensor element being passed through the insulating piece to the connecting elements to be rersehea "

The tea temperature sensor elements are part of the gate as semiconductors

eonsnerad linear DarcafloSan »own and just as linear {electrical output signal is obtained« in such cases

the amount of flowing medium can usually be _; ; Measurement & $ r electric energy bestiamt to ^this: on the Teeperaturfühlerelenente by a Me3rohr strönende

Heat the medium to a specified temperature value «u.

For other applications it seems favorable as heating elements Voltage regulating Zener diodes and as tea temperature sensor elements Semiconductor aligners bu Terwend, which determine the temperature rise in the flowing lediam and Tormigly via electronic amplifiers known to me control a control circuit, which the respectively required gives off electrical energy »around the flowing media» on the set tea temperature to be heated. Babel provides the

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Output power of the amplifier eia MaE the flow rate and äamlt also DurchfluSaenge the medium through the measuring element of Purchf is lußiaessers · The in

i || ■ Medium distributed through the Heiseleaent electrical energy, -. ^; -

d * h. the wattage is directly proportional to the flow velocity of the flow, uad in the case of constant voltage, the electrical energy emitted is directly proportional to the current _. ; an aapereaeter are displayed «In addition, a liae-

t | i ares electrical output signal sum operation of integral

the or other connected devices available *

With large flow rates, where it is not advantageous appears, the entire flowing medium, which flows through the measuring element, to the desired temperature value ea.

Lines may be provided, which means that only a fixed one is used sat down the whole Barch river, and the AnjEeigeia? struBient can be appropriately “divided” over for Hl the Gesastiaenge required multiplication factor ittm off

bring pressure sa. ^; .

In the drawing are exemplary embodiments of the invention shown schematically; show it:

Figure 1 'a principle image of two components, which together form a measuring device of the invention,

FIG. 2 shows a longitudinal section through eiaeii DurciifIuS-aesser according to Figure 1,

^ ^;; Figure 3 also consists of three components measuring

Terriohtung with an alternative Ausfeildang of the flow meter,

4 shows a further embodiment of a cash eater according to the invention,

FIG. 5 shows a partially cut carcass cut side corner of the BurehfluSaeeser according to Figure 4,

Figure € shows a cross section along the line YI-YI in

FIG. 7 shows a basic circuit diagram of a measuring device according to the figures 4-6 «

The embodiment shown in FIGS. 1 and 2 shows the method of direct flow measurement of the flowing medium without reference to the vehicle speed. You can recognize two building enthusiasts A _r B? * otei ait A which is called Burchflußaesser * irksaae Baueleaent vaaä with B the measuring device · Bas durchflttSeapfindliehe component A can be connected to a fuel supply line of a drive machine, and the measuring device B is designed as a display device, which a temperature difference closer and a la the following Voltage control circuit eat-

holds. The electrical resistance 11, which is part of the component i (FIG. 1), is located on the side of the fuel supply line 10, can be fed with electrical power at constant voltage from an appropriately regulated supply line 12 "which goes out to the measuring device B" and is thus able to Ae a constant amount of heat Ia n through the fuel line 10 fuel flowing abzügeben. the measuring device B are a voltage regulating zener diode 13 and a metal filament lamp housed 14 aii positive temperature coefficient, and these control the, "" voltage which i the Heizwiäeretand 11 » path of BrewistoffzuführangsleituBg 10 sugeführt "ird such that the ISänaeenergie remains constant Zusätelieh asu its major involvement in the voltage regulation circuit Α & ε, the metal filament lamp 14 for illuminating a Asxeigeinstrusentes

aad Junior Tort «i3iiaf | miß SehwilKsiehen ^ g to be trained for switching See Systems "

The temperature rise of the fuel toffee flowing through the fuel supply line 10 is detected in the temperature-sensitive building element A by coaxial semiconductor rectifiers 16 and 17, between which the hot resistance 11 lies of the fuel ia a.er Breanatoffzuführungsleitung 10 beeiafIuSt.

The semiconductor rectifiers 17 are generally in the direction of flow behind the heating resistor 11, and through its heat supply The solid state rectifiers 17 show the fuel

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In the same way, it is less expensive than the semiconductor rectifiers 16, which sound the cooler fuel τογ dem , .ι ;; Eeiiiiderstana 11 affects one.

The semiconductor rectifiers 16 and 17 are, together with resistors 18 and 19 as well as a potentiometer 20, parts of a bridge circuit somewhere in FIG . is determined and by a differential Il Terstärker 21 Terstärkt an Anueigeinstruaent 15 suggested - '"is. The deflection of the Anseigeinstrument 15 is in" this ©

fall proportionally to the difference in the temperature of the fuel dead and Bister dea _{Heizwiderctand 11 1} noble the Äblenkang des Seiger aa Änigungseinstroaent usually takes place in eating counterclockwise light

He KosDinationsviirkung the zasaaaenwirkenden components lsi * such that when Wäraetufohr to the fuel of constant amount of the increase in fuel tempera door vice _{versa: ...::;} proportional to Jüua fuel consumption. Accordingly, can

Pi das Anseigeinstraoent 15 in units «ie gallons per hour

or liters per stand or any other parameter of the system calibrated "ground" reverse proportionality of the system can have a non-linear scale division of the display unit 15 conditional, but at the same time brings this Characteristic high sensitivity and good readability with low values of the fuel terbraach «if required «, however, the display instruatent 15 can be ait non-linear Equipped with compensation characteristics to change the display

The ctarchflaSeapflaäliche component, which is shown in Figure 2 is shown in section, usually contains ice

_: se »it einea sentralea MeSrear 22» which ia Iaaeriraua one

| i Schatcgehäases 23 «age ^ te» * let · Is is also «la AasehlitS-

cover flange 24, and these three components are ia suitably quietly connected by vents 23 A za a linear unit · Starting from Töa measuring tube 22 extends in the axial direction Sighting a cylindrical shape seen with Ausaeluaungea Ziiführungsstück 25. Inside the reading tube 22 are the two

: Group tone semiconductor rectifiers 16.17 as well as the heating

Bas MeSrohr 22 is joined to the Brennstoffsuföhrungsleitung \ Q \ by "oak the au measured fuel flows, formed from a material mn τοπ high electrical resistance and band resistance produced. Electrical supply lines 26, 27 and 28, 4 semiconductor rectifiers 16 and 17 as well as the heat resistance W are suitably sealed at their bursting parts through the land of the measuring tube 22, so that no fuel can wipe the measuring tube 22 and the protective housing 23 in the "inner gray" 50 «Can intreten. This HingraoBi 50 forms an «additional heat insulation between the to. measuring fuel and the protective housing 23 «

The two Grappen τοη semiconductor gauges 16 * in & 17 are held in a self-supporting manner within the measuring tube 22 by their supply lines 26, 27. Heiswiderstand leg 11 serve the heraaeragenden at its ends leads 28 sin fasteners in two perforated discs 29, so that the heating resistor 11 centrally located within the measuring tube 22nd the

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perforated clamps 29 generate a turbulent fuel flow, whereby the noise suppression and the distribution of noise »Wipe the Breaastoff and the Seia resistance 11 improved

The recessed feed piece 25 is conventional designed in one piece with the HeSrehr 22. In other In cases, the feeding piece can be made of a material of higher tone Thermal conductivity be designed, which the Tesperatur-Tteilang about the <& iersehaitt before the entry of the fuel β in the SeBrohr 22 designed more uniformly and thereby the accuracy of the temperature attunement is also increased by the subsequent semiconductor rectifier 16.

The Aasführungfona shown in Figure 5 of the drawing shows three | auej, esien | e, which form the MeQtuad Anzeigesjstea geaäS invention. Babel is the component A 1 sensible and is located in the fuel supply line Kraftiaaachine · The component B 1 shows a display panel, which contains an impulse amplifier as well as a temperature differential, and the component C contains an electromagnetic pulse generator which operates at a speed proportional to the driving speed or any other speed variable, for example that the speedometer drive shaft of a speedometer is driven.

During operation, the pulse generator (component C) generates electrical Pulses which are short compared to the duration of one revolution of the head of the pulse generator exhibit.

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These impulses are evaluated by an ImpalsTerstärker 31 Baueleaeats 1 1 aaf dia sufficient power level ver -..., _{; ij} > strengthens * whereby each power pulse has the same amplitude and

% I held for a period of time. The performance impulses »ground« a fester

Heating resistor 32 says which "is arranged within the flow-sensitive component k 1. In this way, heat is added to the fuel proportionally to the speed of the driving suction.

:; The operator's increase in the sensibility caused by darchfln

Baueleatnt & 1 »dripping fuel is determined by» other semiconductor rectifiers 33 aod 34. Piping shows in the cash flow operation of an aegatiyea fesperatarkoeffiirieatea, the permeability voltage being influenced by the temperature of the fuel. The further semiconductor rectifiers 34

-. «.. ^, M ^^ RfaM & JtoJfe & B & ^^ ■ ifa-'ttteiifi ^ le ^".

resistance 32 wb & Iselgem 4Mer # b a comparatively lower forward voltage - corresponding to the heat given off by the further hot resistor 32 to the fuel - than you further semiconductor rectifiers 3% which are fed in by the cooler fuel τβτ Ä # s further hot resistor 32 W

Further resistors 55,36,37,58 and a further potentiometer 39 are matched with the further semiconductor rectifiers 33,34 in a bridge circuit Tereiaigt * where the difference of the BurehlaBvoltage of the two rectifier grooves by a further JLaWEISeinstraaent 4 © determined wlrä. The deflection of this further display instrument 40 1st aar "difference in fuel temperature tot« ad behind the

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- 12 additional heating resistor 32 linearly proportional

The XosbiaatioasffektaBg 4 parts is such that the amount of fuel supplied to the fuel is proportional to the driving speed, while the amount of fuel to be heated is proportional to the fuel consumption of the engine. In this way, the increase in fuel temperature is proportional to the vehicle speed and at the same time inversely proportional to % m fuel consumption, so that the flow-sensitive component A 1 effectively determines the equation: speed divided by fuel consumption. Basic measuring instrument 40 can therefore be calibrated in units of the distance covered per unit of consumption of the fuel, for example in miles per gallon or kilometers per liter or in another parameter of the system.

The bottle knife shown in FIGS. 4 and 5 is a connecting piece 51 and a "B & ekstFSak & fflffier 50" oak with the connecting piece; 51 by screws 150 (the same figure 5) Terbuaden is "Me Bückströmkasmer is pressed in its connection on the same side against a central insulating piece 53, which aa tubular extension 53A forms a measuring tube that ends above the inner bottom surface of the Hüciströiaka-2aier 50. Sas central insulating stack 55 ninat sealed electrical power supply lines 10? aa one 2 # aer-Segeldied # 59 Μ & τ alternatiT aa iron heating resistor) aaf * »owte for sewö! Srappea tos üalfeleitergleichriehierm 57 "ad P * Sie ^ afilhraagsleitaBge ^ 1Q7 eaden an iron SivefeuvtSek 54" which iaaerhal ^ eiser screw sleeve or? He ¥ ^ iöngsiappe 154 is nai with the unit from ItekstrirataiBer 50 und 51 is,

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The two groups τοπ fialleiterrectifier 57 and 5S are cantilevered interior 108 of the tubular Ansätsee 53 A, and the 2ener sailing diode 59 Cöder altematir "in the healing resistance) is suspended on pieces of wire 61 centrally within the interior 108 on two further perforated windows 6 ©, «Calibrate the heat exchange and transition between the Zener sail diode 59 (or the heating resistor) and the fuel by means of turbulence suction. Inside the Sückströmakamaer 50, thermal insulation 55 m and 56 gates are seen on the surfaces. . . .. ".._ ,, .........,."

The overall arrangement is such that the fuel enters through a connection of the supply line 63 and flows through the free inner ruff. Thereafter, the direction of flow is nage-ICeHTt ₁ and through the "pus Elngraa" 155 over several openings 62 distributed over a circle circumference and "in a Bing-

»AWiraaaT'52 stt ^ € ^ t ^ WmB ^^ i '' ^ Wa ^ n ^ a ^ M ^ WtW ^ ^; ' Leading solution 64 *

,, _...: Due to this structure, the groups of the temperature-sensitive II borrowed. Semiconductor rectifier S? and 58 τοη outer seiz-

md. Small fluids, which penetrate the lärraeisolierangen 55 and 56, are largely protected . 58 flows

The operation of the bar flaio eater shown in Figures 4-6 can be based on the principle picture in Fig. 7 This circuit diagram contains a schematic arrangement of the bureh flow meter and the circuit elements.

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lan recognizes two units of semiconductor rectifiers 100 and 101 (corresponding to the groups tob semiconductor equality 57.50 ia figure 4>,

a bridge potentioaeter 105. The bridge circuit is eo
designed that the input signal of a power amplifier 106 το »depends on the difference of the BarchlaSspannnngsäbfall, which occurs at the two units τοη semiconductor rectifiers 100 and 101. The degree of inconsistency of the amplifier input signal can be adjusted by adjusting the bridge

iil kenpotentiometer 105 are regulated. The units of the semiconductor rectifiers 100 and 101 slad are temperature-sensitive to the extent that their low-voltage voltage characteristics have a negative temperature coefficient. The equilibrium of the bridge circuit depends τοη the temperature of the medium, which the named two units rm SaIb-

* & * - ■ ^: - ^: - - ■ - "- ~ - ■■ ^j:> '* ^ cfttjijg! £ ^ ia! T0i ^^

cooling fins (shown in the drawing)

The current output of the power supply unit 106 becomes one Zener voltage regulating diode 107 (corresponding to the Zener sailing diode 59 Is Figure 4) and by an ismeter 108 sat *

Ba ater voltage drop on the Zener voltage regulating diode 10? substantially anabhängig τοη Her current amplitude, and further since the τοη the diode electrical power output is the product of -Stroa and voltage "is the pointer deflection of the ammeter 108 at the same time both the τοη the zener voltage regulator diode 107 output _power} and the through these Diode 107 flowing current proportionally.

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When Betriet the BrSekenpotentiometer 105 Uird ia the softly classified that which is sufficient, v * the temperature determine the disturbed Brückeagleiehgewicht and corresponding "speaking the Leistungsausgaiig of LelstimgSTerstärkers 1œ6 result in a heat output of the Zcner voltage regulation diode 107 of the flowing medium to a certain value. The direction of effect of the bridge circuit consists in an increase in the output power of the power amplifier 106, so the teaperater generated falls below a given value, which is not reversed, Sine? Eruag to bring about the output power of the power amplifier 106 if the moderate increase in the fixed temperature of the medium Exceeds an upper limit value. If the increase or decrease in the dense volume allows the power input of the Zener voltage control diocle 10? proportional to the diameter

This is called flow standstill or vena no flowing at all Medium present in the passage-sensitive component is, no energy supplied «Iri, kaan, sau die Eleaente der Bridge scarf tang so beaeseen, SaS the electricity through tie unit the semiconductor rectifier 101 is greater than the current through the unit of semiconductor rectifiers 100. Be one of them Design, therefore, the temperature of the unit of the semiconductor rectifier 101 rises if no medium is present or the generated cause is distributed by the flow, above the temperature of the ugliness of the semiconductor line 100, and As a result, the output of the power amplifier 106 drops Zero value.

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The current measured with the ammeter IiB su also flows through an iron series resistor 109, to which a voltage drop :;: fall linear ear Ströaungsgeeehwia & igkeit des Trotters

' ^! 'diums occurs · This voltage drop is available as an output

zwa signal. Operation τοη integrating or other connected devices £ or available.

Claims (1)

' HA. 58ff 992 * -9.fl 65 1 # Device for the flow of flow into stream media, ilia rc h g «Ic tam * e 1«% »* t _t ixM la a 1 * flow path of the sweetening medium lying tubular stem (22, 53Ä) at least 6ns an ice sheet (11,32 , 59,107: »m 4t 4ä St ^ aoög ^ ileMaiig hiater © to tor , 101) are arranged, which "old" is known per se " (1 ^, 40,108) are Terbiadbar. 2 * Device according to Anapruch 1, thereby g β k e η a -s «i c h η e t, that in aea measuring tube (22.55A) mleekMi iwei 3. Torrlchteng according to Aasprtteh 1, d ä 3 ο r β hg * k · ma -χ 11 β h β tt _t that the femj "ratar feeler * l""it · (16,17; 4 * TorrichtwBg »part iampm / ak ί _$ thereby g · k * η a -t» I # häst that the electrical · Heiseltaent «ine Bpannaagaregulitrtnd · Zener diode (59,107) tit *, % Torrichtuog according to Anapruch 4 * thereby geienn-K eich η et, dnS ta terbinding «ti tier as heating element Zeaerdiode (107) at least» tia semiconductor glide Richter (100,101) is seen as the function sensor element which via amplifier known per se CtOg) dl · Speisimg the iienerdiode {107) steurt in such a way that the Etrömendeü Medit a Torbestiaate V.ärmeinengö is supplied. .-;. .. 6. Apparatus according to claim 1, dadur c h ge k e n η -distinguished that sur feeding the heating elements »(52) . * - a laptop generator (C) gate "aehen" fjpit a sttr Fshrseag speed proportional drive part coupled lsi * 7. Device according to one or more of the gatekeepers Claims, characterized by g β It e nc, daö in the free inner space of the »eSrohr (22,59a)» wiaohea two tea temperature sensor elements (16, 17; 57, 58) an »eatral (29.60) held heating element (11.59) provided lsi » β * device according to spoke 7, since c h gek * n η - χ s: i β Ii m «f, IaS its IiS ^ * {ψ) fm « Ssm-γβηΗβ * · '"eise also tubular to Schuteeleaent (2 ^) 1ä Afeetaad. Go lel »'^ .. *.!. · ForrichtuGg according to claim % $ β # 4 reit «* 1ε · se 1 ch η« t »that aas MeBrehr (53A), nelchee 4M» Toaperatursensorelemeatea (57 * 53) lying heat »XtMmt ßtröakaaaer i ^ O) eiageseUt iat _f an Sie aich a Terbindimgs · level (5D "it connection (65,64) for 41" Xaführangeleitang and the discharge line of the godly Seaiuas anBchlitSt, the Zuftlhrnngsleitttttg is in the inner rhyme (108) of the UeBronr ends, which la dar Sückströiska-mer (50) above of the Kasaerboaena ends, and that furthermore the free interior space * (153) the Biickströmakaamer (50) old a discharge pipe ctea connecting piece (51) ia Vcrbinduiig stands · 10. Apparatus according to one or more of the gatekeepers Claims, thereby known, «Ad« l # ktri * eaer guideline «efcilden 11 · Device according to claim 10 «thereby g β te η seichcet, äaS deia SeÖrohr (22) eis Is StrSoongsrichtung Tor de «feeärohr (22) liegeades, old» honors Featured Leadership Set (25) 12 · Device according to claim 3 · characterized in that g · Ii en η Hichnet that the temperature sensor elements as a series connection is known per se 13 · Gate direction according to claim 1, characterized in that g * lk * nm ~ «tichn · t ♦ a« Ö di «Te« per »turfühltrtleBtntt <16 # 17i 100,101) tasaamen bit resistances (18,19.20; 103,104,105). ,,:, ;,. 14 * Device according to claim 13, characterized in that the bridge equilibrium helps a potentiometer (20,59,105) can be changed « 15. Device according to claim $ or 9, dad ure hgtke! «Is worthwhile that the inner surfaces of the rubble (25) hsm * the bucks trSiaksaaiwr (50) ■ v ^ ^ "*", \ i , _t j » 16 · föiriefotaiig Baöh ^ sepmefe t _f is & sr fc & g # k # mn · isiclisei, AsS im laas * «r © £» ** «* fs $ t * a 4tea both UiU (29,60) Törgaseiiöa, which aafweisea »^ aS ia ifersm Be ^ aUSi lft% des MsSiISiS oiuti-itt.