WO1982001068A1 - Convertisseur electromecanique - Google Patents

Convertisseur electromecanique Download PDF

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Publication number
WO1982001068A1
WO1982001068A1 PCT/DE1981/000142 DE8100142W WO8201068A1 WO 1982001068 A1 WO1982001068 A1 WO 1982001068A1 DE 8100142 W DE8100142 W DE 8100142W WO 8201068 A1 WO8201068 A1 WO 8201068A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
housing
disks
converter according
permanent magnet
Prior art date
Application number
PCT/DE1981/000142
Other languages
German (de)
English (en)
Inventor
Gmbh Robert Bosch
Original Assignee
Balcke G
Neu H
Herden W
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE3100598A external-priority patent/DE3100598A1/de
Priority claimed from DE19813127937 external-priority patent/DE3127937A1/de
Priority to AU75816/81A priority Critical patent/AU7581681A/en
Application filed by Balcke G, Neu H, Herden W filed Critical Balcke G
Publication of WO1982001068A1 publication Critical patent/WO1982001068A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/14—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means involving the displacement of magnets, e.g. electromagnets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0082—Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means
    • G01L9/0085—Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means using variations in inductance

Definitions

  • the invention is based on a converter according to the type of the main claim and the subordinate ones
  • transducers for measuring the pressure, in particular the intake air pressure, of an internal combustion engine serving to drive a motor vehicle, said transducers having a diaphragm can exposed to the pressure to be measured.
  • a permanent magnet is arranged on one wall of the membrane box and in the vicinity of a magnetic field-sensitive element, for example a Hall IC, so that the distance from the permanent magnet to the magnetic-field-sensitive element varies with pressure-dependent deflection of the membrane, and thus its output signal is influenced. This output signal is then a measure of the pressure measured.
  • the disadvantage of the proposed arrangement is that the spatial assignment of the permanent magnet and the magnetic field-sensitive element to one another cannot be changed, and different requirements for different pressure sensors cannot be adapted so that there is no possibility of adjusting the sensor in a simple manner when assembling the sensor.
  • the pressure sensor according to the invention with the characterizing features of the main claim and the independent claim 5, on the other hand, has the distribution that the spatial position of the permanent magnet and the magnetic field-sensitive element can be adjusted to one another when assembling the pressure sensor, thereby adjusting the sensor to achieve a desired one Characteristic curve is possible, with a further permanent magnet being arranged coaxially for compensation purposes.
  • the sensor according to the invention with the characterizing features of the independent claim 6 also has the advantage that the difference between a measuring pressure and a reference pressure can be measured.
  • the reference pressure can either be variable or an absolute pressure. This opens up a particularly simple possibility for controlling the injection of an internal combustion engine, since this injection usually takes place as a function of the amount of air that is passed through. However, the amount of air is proportional to the difference between the weighted atmospheric pressure and the absolute pressure in the intake manifold, so that a signal proportional to this, which corresponds to the load, can be determined directly with a single sensor without, as is known in the art, two separate ones Sensors required.
  • the same effect can finally be achieved in an advantageous manner according to the invention in that the sensor is surrounded by a pressure-tight housing, so that a measuring or reference pressure can be applied to the interior of the housing. Since, in any case, tight housings are used in electronic control devices in motor vehicles to protect the switching devices against moisture and the like, it is thereby possible in a particularly simple manner to display a differential pressure signal without any significant additional measures.
  • the transducer according to the invention with the characterizing features of claim 23 has the further advantage that a linear characteristic input variable / output variable is achieved in that the characteristic of the magnetic field-sensitive component is adjusted accordingly depending on the size to be measured. This makes it possible to operate display elements or control circuits directly with the encoder according to the invention without having to undertake a characteristic equalization.
  • the negative pressure is measured at a narrow point of a Venturi tube.
  • the quadratic dependence of the negative pressure on the flow velocity is compensated for by the hyperbolic dependence of the output signal of a linear magnetic field-sensitive element on the deflection of the membrane.
  • the height is measured, for example in an aircraft, since the dependence of the air pressure on the height is also quadratic.
  • the absence of mechanical elements with friction means that absolutely hysteresis-free measurements are possible, the resolution of the measurement size being very suitable by suitable selection of the components and the transducer ring can be held.
  • the overall linear characteristic of the converter is also advantageous, which can only be achieved with great effort in mechanical systems.
  • the few components used result in simple and therefore cost-effective production, and particularly temperature-stable behavior can be achieved by suitable measures specified in the subclaims.
  • FIG. 1 shows a cross section through a first embodiment of a pressure serisor according to the invention
  • Figure 2 shows a cross section through a second embodiment of a pressure sensor according to the invention
  • Figure 3 shows a cross section through a third embodiment of a pressure sensor according to the invention
  • Figure 4 is a schematic diagram of an intake manifold of an internal combustion engine
  • Figures 5 to 9 cross sections and views of a fourth, fifth, sixth and seventh embodiment of a pressure sensor according to the invention
  • FIGS. 10 to 13 are diagrams for explaining the linearization of the overall characteristic of the transducers according to the invention
  • FIG. 14 shows an eighth exemplary embodiment of a converter according to the invention
  • FIG. 1 shows a cross section through a first embodiment of a pressure serisor according to the invention
  • Figure 2 shows a cross section through a second embodiment of a pressure sensor according to the invention
  • Figure 3 shows a cross section through a third embodiment of a pressure sensor according to the invention
  • Figure 4 is a schematic diagram of an intake man
  • FIG. 15 shows the circuit diagram of a first circuit for evaluating the output signal of a converter according to the invention
  • FIG. 16 shows a circuit diagram of a second embodiment of a circuit for evaluating the output signal of an invent according to the converter
  • FIG. 17 shows a circuit diagram of a third embodiment of a circuit for evaluating the output signal of a converter according to the invention.
  • 1 denotes a membrane box, one wall of which carries a first permanent magnet 2.
  • a magnetic field-sensitive element 3 is arranged in the vicinity of the first permanent magnet 2 and a second permanent magnet 4 is arranged in the vicinity of the side of the magnetic field-sensitive element 3 facing away from the first permanent magnet 2.
  • the first permanent magnet 2, the magnetic field-sensitive element 3 and the second permanent magnet 4 lie in one axis, namely in the axis of a housing 5, which is equipped at both ends with blind holes, which are each provided with a fine thread 6 and 7, respectively.
  • Disks 8 and 9 can be screwed into the fine threads 6 and 7, respectively.
  • the disk 8 carries the other wall of the membrane box 1 on its side facing the housing interior.
  • the second permanent magnet 4 is arranged on the other disk 9.
  • the magnetic field-sensitive element 3 is finally connected to the housing 5 in a spatially fixed manner via a holder.
  • the deflection of the membrane box 1 is dependent on the pressure in the box and the pressure in the housing 5. With the housing 5 open, as shown in FIG. 1, the pressure sensor measures the difference between the measuring pressure in the membrane box 1 and the atmosphere.
  • the relative position of the first permanent magnet 2 with respect to the magnetic field-sensitive element 3 can be changed by screwing the screw in or out Disc 8 can be varied.
  • springs 10, 11 are finally provided, which are supported on the one hand on the side of the disks 8 and 9 facing the housing interior and on the other hand on the shoulders of the respective blind bores.
  • these springs 10 and 11 are preloaded, so that mechanical play is eliminated as a result.
  • the blind bores are not equipped with a fine thread and the disks are pressed into the bores in a snug fit.
  • an arrangement is also used to vary the relative position of the first permanent magnet 2 or the second permanent magnet 4 with respect to the magnetic field-sensitive element 3, in which the magnets 2 or 4 of disks 8 'or 9 'are carried in one axis with the magnetic field-sensitive element 3.
  • the disks 8 'or 9' rest on end surfaces of the housing 5 which are perpendicular to the axis and are screwed to the latter.
  • the variation of the distance is achieved in that thin washers 12 and 13 are arranged between the washers 8 'and 9' and the housing 5, so that by a suitable choice of the thickness of the washers 12, 13 and a number of several thin washers the desired spatial distance of the elements 2, 3, 4 to each other is adjustable.
  • the second permanent magnet 4 in deviation from the exemplary embodiment according to FIG. 2, is not arranged directly on the disk 9 which can be screwed in and out, rather there is a further membrane box between the second permanent magnet 4 and the disk 9 14, which, as in the exemplary embodiment according to FIG. 3, can be designed as a closed absolute pressure can or which can be supplied with a reference pressure via a separate connecting piece.
  • the position of the first permanent magnet 2 and the second permanent magnet 4 relative to the magnetic field-sensitive element 3 is changed by the action of the measuring pressure on the membrane box 1 and the absolute or relative reference pressure on the further membrane box 14.
  • the output signal of this element 3 therefore depends on the measuring pressure and the reference pressure.
  • the second diaphragm box 14, as shown in FIG. 3 is designed as an absolute pressure cell, the arrangement according to FIG. 3 is particularly suitable for use in the control of ignition and injection systems in motor vehicles. In these systems, the intake manifold vacuum or intake manifold absolute pressure in conjunction with the atmospheric pressure is usually used as a control variable. 3, the output voltage U A of the magnetic field-sensitive element 3 is:
  • ⁇ and ß are constants and P atm is the atmospheric pressure and P u is the intake manifold vacuum.
  • FIG. 4 shows a basic diagram of an intake manifold 20 of an internal combustion engine.
  • the direction of the intake air is indicated by arrows 21.
  • a throttle valve 23 is shown rotatable about a fulcrum 22 in three positions 23a for a closed throttle valve, 23b for a half-opened throttle valve and 23c for a fully open throttle valve.
  • ports 24, 25 are arranged on the intake manifold in such a way that when the throttle valve 23a is closed, the port 24 is connected to the part on the engine side and the port 25 is connected to the part of the intake manifold 20 facing away from the engine, in each case based on the position of the throttle valve 23. If the throttle valve 23 is opened and it is in the position 23b, this relationship is reversed, ie the connection 24 is now connected to the part of the intake manifold 20 facing away from the engine and the connection 25. This means that the difference between the pressure values measured at the connections 24, 25 is positive in one case and negative in the other case. When the throttle valve 23c is fully open, the difference between the pressure values measured at the connections 24, 25 is finally practically zero, since due to the position of the throttle valve 23 there is no longer any pressure difference.
  • connections 2k, 25 are now connected to the diaphragm sockets 1, 14 of the exemplary embodiment according to FIG. 3, in addition to the analog signal for the pressure difference between the atmosphere and the intake manifold, a digital signal can be generated for the position of the throttle valve in each case , because, as already mentioned, the pressure difference is once positive, once negative and once zero.
  • a pressure sensor according to the invention according to FIG. 5 in which one pressure is introduced via a connection 30 into the measuring diaphragm socket 1 and the other pressure via a connection 31, which is located in the wall of the latter Case pressure sealed housing 5 befin det.
  • the deflection of the permanent magnet 2 is dependent on the pressure difference at the connections 24, 25, which are connected to the connections 30, 31 of the pressure sensor.
  • FIGS. 1, 2, 3 and 5 it is also possible to arrange a pressure sensor as shown in FIGS. 1, 2, 3 and 5 in a further housing 32, as is indicated, for example, in FIGS. 6a, b and c.
  • the housing 32 is also designed to be pressure-tight.
  • the housing 32 there are two connections 30a and 31a, which in the exemplary embodiment shown in FIG. 6 are connected to the membrane socket 1 via a line 34 or to the interior of the housing via a line 33.
  • the connections 24, 25 of the suction pipe 20 are connected to the connections 30a, 31a or vice versa.
  • the deflection of the permanent magnet 2 is in turn a function of the pressure difference, so that a signal corresponding to the throttle valve position is in turn generated.
  • the control device In the current electronic control systems for internal combustion engines in motor vehicles, the control device is surrounded by a housing which protects the control device against moisture and the like. If this housing is now made pressure-tight, it can serve as housing 32, as shown in FIGS. 6a to c.
  • the pressure transducer with its foot part 26, which is kept smaller in outer diameter and which contains the threaded washer 9 and the helical spring 11, is inserted into a plastic press designed as an intermediate base 28, which together with an upper part 36 also pressed from plastic includes the pressure transmitter according to Figure 1 and if necessary can be sealed airtight and moisture-proof.
  • the connection 30 of the pressure transducer protrudes into the longitudinal bore 27 of a connection piece 38 formed on the upper part 36, onto which a connecting hose, not shown, can be pushed, with which the longitudinal bore 27 of the connection piece 38 can be connected to the intake pipe of an internal combustion engine, not shown, and can then bring about the negative pressure prevailing in the intake pipe in the double diaphragm can 1.
  • connection 30 is sealed from the outside air pressure prevailing in the upper part 36 by a rubber ring 39, the penetration of moisture being prevented by a disk-shaped Teflon element 35 inserted into a pressure compensation opening 29.
  • An annular sealing bead 37 and an annular groove 37a receiving this sealing bead are provided on the superimposed end faces of the upper part 36 and the intermediate base 28.
  • the intermediate floor 28 of the housing enclosing the pressure sensor serves as the lid of a pot-shaped base part 40, which is also pressed from plastic and contains a cutout 43 that runs from the top 41 to the bottom 42. This is closed at the bottom by a metal plate 44, which serves as a heat sink for a semiconductor circuit 45.
  • a Hall IC preferably serving as a magnetic field-sensitive element 3
  • three connecting tabs 46 each of which is soldered to one of three thin, leaf-shaped connecting lines 47.
  • These connecting lines 47 are extrusion-coated in the manner shown in FIG. 7 from the plastic of the base part 40 in such a way that their angled end section 48 protruding into the recess 43 forms a soldering point for a flexible connecting lug 49, which leads to the semiconductor circuit 45.
  • Opposite edge of the semiconductor circuit 45 are provided in the material of the lower part 40 injected tongues 50 which are connected to the semiconductor circuit 45 at their end portions projecting into the recess 43 via a connecting wire 51 (FIG. 7) and at their other end portion 52 into the inner cavity 53 protrude into a one-piece molded on the bottom part 40 socket 54, where they can be connected by a suitable connector sleeve.
  • the semiconductor circuit 45 is cast airtight and moisture-tight with a silicone gel layer.
  • This potting layer 55 also includes a large part of the connecting wires 49 and 51.
  • 28 sealing ribs 56, 57 are arranged on the underside of the intermediate base, which engage in suitable recesses 58, 59 on the upper side 41 of the lower part 40 and are tightly connected to the latter by adhesive.
  • FIG. 9 shows a modified embodiment of the invention, which differs advantageously from those according to FIGS. 7 and 8 in that the vacuum sensor shown in FIG. 9 can be installed upside down and is freely accessible for testing and adjustment purposes, as long as the very simply constructed, upper part made of plastic indicated in FIG. 9 at 60 has not yet been put on.
  • the supply of the pressure or of the negative pressure prevailing in the intake pipe of an internal combustion engine, not shown, takes place - in contrast to the exemplary embodiment according to FIGS is guided to a central annular space 65, into which the connection 30 of the pressure transmitter, which is used for connection to the double diaphragm box 1, projects.
  • the metal housing 5 of the pressure sensor which is otherwise designed as shown in Figure 1, is by several supported on the top of the intermediate floor 62, resiliently formed tongues 66; it is held when placing the upper housing part 60 by a foam rubber cushion 67 placed on the foot part 26 of the pressure transducer so that the pressure transducer can withstand even the strongest shaking stresses occurring during operation on motor vehicles.
  • the dependence of the deflection s of the membrane of the pressure cell 1 on the measuring pressure p is linear, as is shown schematically in FIG. 10 by the course 120.
  • the induction B at the location of the component 3 has a hyperbolic profile 121 as a function of the deflection s, as can be seen from FIG. 11.
  • the amount of induction B, which is exerted on the component 3 by the fixed compensation magnet 4 is independent of the deflection s, as can be seen from the curve 122 in FIG. 11.
  • the magnets 2, 4 and the component 3 are arranged in one axis. If the compensation magnet 4 were now moved along this axis, the course 122 in the ordinate direction in FIG. 11 would also change.
  • a field plate is provided according to the invention as component 3, which has an area 124 with a parabolic course in at least part of its characteristic curve 123, as is shown schematically in FIG.
  • the overall characteristic curve of the encoder now results from a combination of the curves 120, 121, 122, 123, the hyperbo lical course 121 of the induction at the measurement site is compensated for by the parabolic course in the area 12U of the field plate.
  • an absolute pressure arrangement can advantageously be used for measuring the height, for example in an aircraft.
  • the pressure decreases with increasing height, the non-linearity of the relationship between height and pressure being compensated for by the hyperbolic curve 121 according to FIG. 11.
  • a linear component 3 gives a linear output signal for the height.
  • an indirect measurement is carried out via the negative pressure at a constriction 130 of a Venturi tube 131, as is shown schematically in FIG. 14.
  • the connector 30 of the pressure cell 1 is connected directly to the constriction 130 of the venturi tube 131 and the interior of the housing 5 is connected to the atmospheric external pressure.
  • FIG. 15 shows an evaluation and display circuit for a Hall IC. From terminal 115, a first line leads to a terminal 150 connected to operating voltage U B and a second line via a display instrument 152 to the tap of a potentiometer 153, which is connected between operating voltage and ground and a third terminal to ground. The first and the third connection serve for the power supply of the Hall IC, while the measurement signal can be removed via the second connection. The measurement signal is displayed directly on the display instrument 152. In the measurements of the height and the flow velocity described in detail above, in which a linear Hall IC is expediently used, this measured variable can therefore be read directly on the display instrument 152.
  • a transducer according to the invention is used to measure the height, for example in an aircraft
  • the rate of descent / climb of the aircraft can advantageously be detected and displayed using an evaluation and display circuit as shown in FIG. 6 .
  • a differentiating element consisting of the resistor 155, a capacitor 154 and an operational amplifier 156 is connected to the display instrument 157.
  • the display instrument 157 Thereby is over the number adornment limb 154, 155, 156 formed the first time derivative of the altitude and thus the sinking or climbing speed of the aircraft and displayed on the display instrument 157.
  • FIG. 17 An expedient combination of these two circuits is shown in FIG. 17, the circuit part designated by the reference numbers 152, 153 being used, as already explained, to display the height on the display instrument 152.
  • the measurement signal is also passed through the differentiating capacitor 154 and a resistor 158 to an operational amplifier 156, which is bridged by the resistor 155 and a capacitor 159.
  • the operational amplifiers 156, 160 there is the display instrument 157 for the sinking / climbing speed of the aircraft, the one input of the operational amplifier 160 continuing to be led to the potentiometer 153 and, on the other hand, connected to ground via a capacitor 161.
  • the altitude is displayed on the display instrument 152, and the evaluation via the differentiator 155, 154 causes the aircraft's sink / climb speed to be displayed on the display instrument 157.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

Dans le convertisseur propose, un premier aimant (2) dispose sur une boite a diaphragme (1), un element (3) sensible au champ magnetique et un deuxieme aimant (4) prevu pour la mise au point sont places sur un axe a l'interieur d'un boitier (5). Pour l'equilibrage du detecteur de pression, la position des aimants (2, 4) est ajustable le long de l'axe (figure 1). Le convertisseur lui-meme peut etre dispose a l'interieur d'une enveloppe etanche a la pression. En reglant la caracteristique des aimants (2, 4) et/ou de l'element (3), on peut mesurer diverses grandeurs physiques.
PCT/DE1981/000142 1980-09-04 1981-09-16 Convertisseur electromecanique WO1982001068A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU75816/81A AU7581681A (en) 1980-09-04 1981-09-02 Device for the coded electronic locking of locks

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE3035621 1980-09-20
DE3035621 1980-09-20
DE3100598 1981-01-10
DE3100598A DE3100598A1 (de) 1980-09-20 1981-01-10 Mechanisch-elektrischer wandler
DE3106953 1981-02-25
DE3106953810225 1981-02-25
DE19813127937 DE3127937A1 (de) 1980-09-20 1981-07-15 Drucksensor
DE3127937 1981-07-15

Publications (1)

Publication Number Publication Date
WO1982001068A1 true WO1982001068A1 (fr) 1982-04-01

Family

ID=27432575

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1981/000142 WO1982001068A1 (fr) 1980-09-04 1981-09-16 Convertisseur electromecanique

Country Status (2)

Country Link
EP (1) EP0060859A1 (fr)
WO (1) WO1982001068A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119932A (en) * 1982-05-07 1983-11-23 British Ind Biolog Research As Low pressure sensor for monitoring respiration
EP0244736A2 (fr) * 1986-05-05 1987-11-11 KMK-Sensortechnik GmbH & Co. Capteur de pression
EP0255906A2 (fr) * 1986-08-06 1988-02-17 Pfister GmbH Membrane pour dispositifs de mesure d'une force
GB2247316A (en) * 1990-07-21 1992-02-26 Bailey & Mackey Limited Pressure sensor utilising Hall-effect device
EP0884572A1 (fr) * 1997-06-13 1998-12-16 Jaeger Regulation Société Anonyme Capteur de mesure de pression.
FR2833348A1 (fr) * 2001-12-12 2003-06-13 In Lhc Detecteur de pression de fluide
FR2994862A1 (fr) * 2012-08-29 2014-03-07 Geann Ind Co Ltd Unite de fourniture d'ozone actionnee par un fluide gazeux
ITRM20120435A1 (it) * 2012-09-12 2014-03-13 Geann Ind Co Ltd Unita' di alimentazione di ozono azionata da un fluido gassoso
AT512463A3 (de) * 2012-02-09 2014-11-15 Faculty of Electrical Engineering University of Ljubljana Verfahren und Vorrichtung zur Krafterfassung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU569828B2 (en) * 1986-04-17 1988-02-18 Nihon Radiator Co., Ltd. Pressure transducer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1187788A (fr) * 1957-07-26 1959-09-16 Commissariat Energie Atomique Capteur de pression compensé
DE1498326A1 (de) * 1964-12-10 1969-01-09 Domus Editoriale Vorrichtung mit weitem Ansprechbereich zum fortlaufenden Messen der Durchsatzmenge eines Fluidums durch die Vorrichtung
FR2437614A1 (fr) * 1978-09-28 1980-04-25 Bosch Gmbh Robert Transducteur mecanique electrique pour la mesure de la pression
FR2447021A1 (fr) * 1979-01-16 1980-08-14 Naganokeiki Seisakujo Cy Ltd Dispositif de mesure de la pression intracranienne d'un patient

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1187788A (fr) * 1957-07-26 1959-09-16 Commissariat Energie Atomique Capteur de pression compensé
DE1498326A1 (de) * 1964-12-10 1969-01-09 Domus Editoriale Vorrichtung mit weitem Ansprechbereich zum fortlaufenden Messen der Durchsatzmenge eines Fluidums durch die Vorrichtung
FR2437614A1 (fr) * 1978-09-28 1980-04-25 Bosch Gmbh Robert Transducteur mecanique electrique pour la mesure de la pression
FR2447021A1 (fr) * 1979-01-16 1980-08-14 Naganokeiki Seisakujo Cy Ltd Dispositif de mesure de la pression intracranienne d'un patient

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119932A (en) * 1982-05-07 1983-11-23 British Ind Biolog Research As Low pressure sensor for monitoring respiration
EP0244736A2 (fr) * 1986-05-05 1987-11-11 KMK-Sensortechnik GmbH & Co. Capteur de pression
EP0244736A3 (fr) * 1986-05-05 1989-04-26 KMK-Sensortechnik GmbH & Co. Capteur de pression
EP0255906A2 (fr) * 1986-08-06 1988-02-17 Pfister GmbH Membrane pour dispositifs de mesure d'une force
EP0255906A3 (en) * 1986-08-06 1989-08-09 Pfister Gmbh Diaphragm for force measuring devices
GB2247316A (en) * 1990-07-21 1992-02-26 Bailey & Mackey Limited Pressure sensor utilising Hall-effect device
EP0884572A1 (fr) * 1997-06-13 1998-12-16 Jaeger Regulation Société Anonyme Capteur de mesure de pression.
FR2833348A1 (fr) * 2001-12-12 2003-06-13 In Lhc Detecteur de pression de fluide
EP1319936A1 (fr) * 2001-12-12 2003-06-18 In-Lhc Détecteur de pression
AT512463A3 (de) * 2012-02-09 2014-11-15 Faculty of Electrical Engineering University of Ljubljana Verfahren und Vorrichtung zur Krafterfassung
AT512463B1 (de) * 2012-02-09 2015-02-15 Faculty of Electrical Engineering University of Ljubljana Verfahren und Vorrichtung zur Krafterfassung
FR2994862A1 (fr) * 2012-08-29 2014-03-07 Geann Ind Co Ltd Unite de fourniture d'ozone actionnee par un fluide gazeux
ITRM20120435A1 (it) * 2012-09-12 2014-03-13 Geann Ind Co Ltd Unita' di alimentazione di ozono azionata da un fluido gassoso

Also Published As

Publication number Publication date
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