FR2626670A1 - Pressure and deformation sensor - Google Patents

Pressure and deformation sensor Download PDF

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Publication number
FR2626670A1
FR2626670A1 FR8801215A FR8801215A FR2626670A1 FR 2626670 A1 FR2626670 A1 FR 2626670A1 FR 8801215 A FR8801215 A FR 8801215A FR 8801215 A FR8801215 A FR 8801215A FR 2626670 A1 FR2626670 A1 FR 2626670A1
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FR
France
Prior art keywords
pressure
piston
deformation sensor
diaphragm
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR8801215A
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French (fr)
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Individual
Original Assignee
Individual
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 FR8708579A external-priority patent/FR2616906A1/en
Application filed by Individual filed Critical Individual
Priority to FR8801215A priority Critical patent/FR2626670A1/en
Publication of FR2626670A1 publication Critical patent/FR2626670A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02—Apparatus for indicating wear
    • F16D66/021—Apparatus for indicating wear using electrical detection or indication means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • 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
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
    • G01L9/0058—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance of pressure sensitive conductive solid or liquid material, e.g. carbon granules
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/005—Force, torque, stress or strain

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The certificate of addition application relates to fluid or mechanical pressure sensors which make it possible to provide information on an overpressure or an underpressure which should not be passed through. It consists of a casing 1 having a fastening orifice 15, in the bottom of which is situated a seal 17 and a valve flap return member 16. A diaphragm 2, stressed by a pressure applied to its lower face, moves the piston 14 which compresses the granulated carbon 10, thus altering its resistance to the passing of an electric current which arrives through the wires 5 welded on to the metal diaphragms 4, which contain, by means of a 4-lobed O-ring 11 on to which they are bonded, the carbon granules 10. The spring 12 makes it possible both to adjust the pressure under the diaphragm 2 and to return the piston 14 downwards, which piston has its upward travel limited by a spacer 13. A support 8, against which the upper diaphragm 4 is bonded, comprises an O-ring 9 which makes it possible to block a fluid which finds a passage through possible damage to the diaphragm 2; a groove 7 makes it possible, by screwing, to bring the pallet 4.10.11 closer to the piston 14. The wires 5 are held by a drop of adhesive 6 at the extremity of an orifice. Amongst the most advantageous applications of this device, mention may be made of remote monitoring of the pressure in tyres, spare wheel and rotating wheels of motor vehicles by an appropriate system.

Description

CAPTEURS DE PHESSIONS ET DE DEFORMATIONS
Le capteur de pressions et de déformations, selon les dessins de la demande de certificat d'addition, concerne un dispositif permettant, par exemple, le controle de la pression d'un fluide ou une déformation de pièce mécanique par apport à une autre.SENSORS OF PHESSIONS AND DEFORMATIONS
The pressure and deformation sensor, according to the drawings of the request for addition certificate, relates to a device allowing, for example, the control of the pressure of a fluid or a deformation of a mechanical part by adding to another.

Les dispositifs connus de ce genre présentent des inconvé -niente. Le manomètre a celui d'être encombrant et dans la plupart des cas tributaire d'un tuyau et d'un robinet. Les jau -ges de contraintes avec leur appareillage électronique, ainsi que les comparateurs, ont celui d'ètre d'un prix de revient élevé justifié par leur complexité.  Known devices of this kind have drawbacks. The pressure gauge is that of being bulky and in most cases dependent on a hose and a tap. The strain gauges with their electronic equipment, as well as the comparators, have the advantage of being of a high cost price justified by their complexity.

Ce capteur de pression et de déformation est composé de gre -naille de charbon contenue dans le diamètre intérieur d'un joint torique à quatre lobes par deux membranes en matériau conducteur d'électricité collés de part et dssautre du point torique et sur chacune desquelles un fil de cuivre émaillé est soudé; ce petit ensemble constituant une pastille. This pressure and deformation sensor is made up of coarse coal contained in the inside diameter of an O-ring with four lobes by two membranes of electrically conductive material glued on either side of the O-point and on each of which a enameled copper wire is soldered; this small set constituting a pastille.

Cette pastille, dont les surfaces extérieures des membranes sont ioléessélectriquement parlantspar un vernir est collée par sa membrane supérieure à un support mobile par vissage; ce qui permettra de rapprocher plus ou moins la pastille d'un piston poussoir commandé par la poussée d'un fluide , ou une poussée mécanique, agiasamt sous une membrane de piston.This patch, whose outer surfaces of the membranes are electrically isolated by a varnish, is bonded by its upper membrane to a mobile support by screwing; which will more or less bring the pellet of a push piston controlled by the push of a fluid, or a mechanical push, agiasamt under a piston membrane.

Une entretoise emmanchée sur le piston poussoir en limite la levée et donc évite le risque d'une déterioration de membrane de piston et de pastille consécutive B une pression trop importante sur la surface inférieure de 21a membrane de piston.A spacer fitted on the push piston limits the lift and therefore avoids the risk of deterioration of the piston diaphragm and of the pad following excessive pressure on the lower surface of the piston diaphragm.

Un ressort de rappel libre progressivement la pastille,donc la compression de la grenaille de charbon, en rappelant lle piston vers le bas lorsque la pression sous la membrane de piston ee fait moins forte; d'ou une résistance accrue au pas -sage d'un courant électrique par la grenaille de charbon. A return spring gradually releases the pellet, therefore the compression of the coal shot, bringing the piston down when the pressure under the piston diaphragm is less strong; hence an increased resistance to the passage of an electric current by coal shot.

La figure . 1 . représente, en coupe, le dispositif selon la demande de certificat d'addition. The figure . 1. represents, in section, the device according to the request for certificate of addition.

La figure . 2 . représente, en coupe, une variante de ce dis -positif; o'est a dire que la pression sous la membrane de piston libère la pastille, collée dans ce cas par sa membrane inférieureP Un poussoir appui sur lia membrane supérieure de la pastille quand la pression sous la membrane de piston va en diminuant Le piston poussoir, dans ce cas, n'a aucune action directe sur la membrane inférieure de la pastille. The figure . 2. shows, in section, a variant of this device; that is to say that the pressure under the piston membrane releases the pellet, glued in this case by its lower membrane P A pusher presses on the upper membrane of the pellet when the pressure under the piston membrane decreases The push piston, in this case, has no direct action on the lower membrane of the pellet.

Le dispositif représenté par la figure . 1 . comporte un boi -tier (1) qui se fixe par un orifice taraudé (15) dans le fond duquel se trouve un joint (17) en caoutchouc et un repoussoir (16) de valve, dans le cas ou le dispositif est mis en place sur une ohambre a air. The device shown in the figure. 1. comprises a housing -tier (1) which is fixed by a threaded orifice (15) in the bottom of which is a rubber seal (17) and a valve stem (16), in the case where the device is put in place on an air chamber.

De l'autre coté de ce boitier,un autre orifice taraudé reçoit un raccord (3) qui serre, en partie, dans le fond du chambrage supérieur du boitier (X) une membrane (2) de piston actionné vers le haut par une poussée appliquée sur sa surface inférieureP
Un piston poussoir (14), comportant une entretoise (13) de sécu -rité, appui sur La membrane inférieure d'une pastille composée de grenaille de charbon (10) contenue entre deux membranes (4) et un joint torique a quatre lobes (11)..Un ressort (12) de rap -pel prenant appui d'une part,sous la teste du piston (14), d'autre part sur un nervurage du raccord (3) libère progressivement l'action du piston (14) sur la membrane (4) inférieure de la pastille quand l'action sous la membrane de piston se fait moins forte Deux fils (5) de cuivre émaillé, soudés sur les membranes (4), sont immobilisés par une larme l & de colle aw débouché d'un orifioe pratiqué dans un support (8) sur laquelle la membrane (4) supérieure e la pastille est collée.On the other side of this box, another tapped orifice receives a fitting (3) which clamps, in part, in the bottom of the upper recess of the box (X) a diaphragm (2) of piston actuated upwards by a push applied to its lower surface P
A push piston (14), comprising a safety spacer (13), pressing on the lower membrane of a pellet composed of coal shot (10) contained between two membranes (4) and an O-ring with four lobes ( 11) .. A spring (12) of rap -pel bearing on the one hand, under the test of the piston (14), on the other hand on a rib of the connector (3) gradually releases the action of the piston (14 ) on the lower membrane (4) of the pellet when the action under the piston membrane becomes weaker Two wires (5) of enamelled copper, soldered on the membranes (4), are immobilized by a teardrop l & glue aw outlet of an orifice made in a support (8) on which the upper membrane (4) of the pellet is glued.

Bn toint (9) torique ,prisonnier dans une gorge du support (b) assure L'étanchéité ,entre le raccord (3) et le support (8) au cas ou la membrane de piston (2) serait détériorée. A toroidal top (9) trapped in a groove in the support (b) ensures the seal between the fitting (3) and the support (8) in the event that the piston membrane (2) is damaged.

b e fente (7) prat,2qude sur le support (8) permet le réglage *'approche entre la pastille (4-10-11) et le piston (14)
Dans la forme de réalisation, selon la figure . 2 v le piston (14) comporte deux évidements dans lesquels les tettes es vis (19) sont noyées. Ces deux vis (19) sont vissées dans la colle -rette a'un poussoir (18) dans lequel deux trous, garnis de caoutchouc, permettent le passage des fils (5).be slit (7) prat, 2qude on the support (8) allows adjustment * 'approach between the pellet (4-10-11) and the piston (14)
In the embodiment, according to the figure. 2 v the piston (14) has two recesses in which the heads and screws (19) are embedded. These two screws (19) are screwed into the glue-rette to a pusher (18) in which two holes, lined with rubber, allow the passage of the wires (5).

La pastille (4.10.11) est collée sur le nervurage du raccord (3) par sa membrane (4) inférieure. L. manque de pression sous la membrane (2) de piston met progressivement en compression la pastille (4.10.11) sollicitée par l'action du poussoir (18) entrainé par les vis (19) et le piston (14) grace au ressort (12)* Dans cette forme de réalisation, la grenaille de charbon (10) est donc comprimée par manque de pression sous la membrane.  The patch (4.10.11) is glued to the rib of the fitting (3) by its lower membrane (4). L. lack of pressure under the diaphragm (2) of the piston gradually puts the pellet (4.10.11) in compression under stress by the action of the pusher (18) driven by the screws (19) and the piston (14) thanks to the spring (12) * In this embodiment, the coal shot (10) is therefore compressed by lack of pressure under the membrane.

Claims (7)

REVENDICATIONS 1) Capteur de pression et de déformation caractérisé en ce qu'il comporte un orifice de firation(l5) par lequel une pres -sion exercée, par un fluide ou une action mécanique, agit sur une membrane (2) qui déplace un piston (14), lequel comprime de la grenaille de charbon (1Q) contenue entre un joint torique a quatre lobes (11) et deux membranes (4) dont la supérieure est collée sur un support (8),  1) Pressure and deformation sensor characterized in that it comprises a firation orifice (l5) by which a pressure exerted, by a fluid or a mechanical action, acts on a membrane (2) which moves a piston ( 14), which compresses coal shot (1Q) contained between an O-ring with four lobes (11) and two membranes (4), the upper of which is bonded to a support (8), 2) Capteur de pression et de deformation selon la revendication 1, caractérisé en ce que l'orifice taraudé (15) comporte un joint (17) en caoutchouc et un poussoir (16) de valve de chambre A air. 2) Pressure and deformation sensor according to claim 1, characterized in that the threaded orifice (15) comprises a seal (17) in rubber and a pusher (16) of air chamber valve. 3) Capteur de pression et de déformation selon la revendication 1, caractérisé en ce que la membrane (2) st maintenue, serrée, sur la surface de sa couronne, entre le chambrage d'un boitier (1) et un raccord (3). 3) pressure and deformation sensor according to claim 1, characterized in that the membrane (2) is maintained, clamped, on the surface of its crown, between the recess of a case (1) and a fitting (3) . 4) Capteur de pression et de déformation selon la revendication 1, caractérisé en ce que le piston (14) comporte une collerette sur laquelle prend appui une entretoise (13) de sécutité et un ressort de rappel (12). 4) Pressure and deformation sensor according to claim 1, characterized in that the piston (14) has a collar on which rests a spacer (13) of safety and a return spring (12). 5) Capteur de pression et de déformation selon la revendication 1, caractérisé en ce que les membranes (4) et le joint torique å quatre lobes (11) contenant la grenaille de charbon (10) sont collés entre eux et que les membranes (4) ont leurs surfaces extérieures isolées électriquement, 5) Pressure and deformation sensor according to claim 1, characterized in that the membranes (4) and the four-lobe O-ring (11) containing the coal shot (10) are bonded together and that the membranes (4 ) have their outer surfaces electrically insulated, 6) Capteur de pression et de déformation selon la revendication 1, caractérisé en ce que le support (8) par lequel débouche les deux fils (5) soudés sur les membranes (4) comporte une rainure (7) et un joint torique d'étanchéité (9)  6) Pressure and deformation sensor according to claim 1, characterized in that the support (8) through which the two wires (5) welded onto the membranes (4) have a groove (7) and an O-ring of waterproofing (9) 7) Capteur de pression et de déformation selon la revendication 6,caractérisé en ce que les deux fils (5) sont saisis au débouché du support (8) par une larme de colle (6)..  7) Pressure and deformation sensor according to claim 6, characterized in that the two wires (5) are gripped at the outlet of the support (8) by a tear of glue (6) ..
FR8801215A 1987-06-17 1988-01-29 Pressure and deformation sensor Pending FR2626670A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8801215A FR2626670A1 (en) 1987-06-17 1988-01-29 Pressure and deformation sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8708579A FR2616906A1 (en) 1987-06-17 1987-06-17 Pressure and deformation sensor
FR8801215A FR2626670A1 (en) 1987-06-17 1988-01-29 Pressure and deformation sensor

Publications (1)

Publication Number Publication Date
FR2626670A1 true FR2626670A1 (en) 1989-08-04

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FR8801215A Pending FR2626670A1 (en) 1987-06-17 1988-01-29 Pressure and deformation sensor

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FR (1) FR2626670A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992001915A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine
WO1992001916A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine
WO1992001913A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine
WO1992001914A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine
WO1992001912A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in the combustion space of an internal-combustion engine
WO1992015851A1 (en) * 1991-02-27 1992-09-17 Robert Bosch Gmbh Pressure sensor for determining the pressure in the combustion chamber of an internal combustion engine
WO2000031766A1 (en) * 1998-11-25 2000-06-02 Piab Ab Pressure control switch with conductive diaphragm
US20130084784A1 (en) * 2011-09-30 2013-04-04 Hon Hai Precision Industry Co., Ltd. Pressure detection device and polishing apparatus
CN101780754B (en) * 2009-01-15 2015-06-17 黄腾文 Air leakage prevention tyre pressure detector
CN108931218A (en) * 2018-08-09 2018-12-04 东莞市协盛汽车配件科技有限公司 A kind of automobile component detection device and its detection method
CN116984417A (en) * 2023-09-26 2023-11-03 太原科技大学 Strip stretching bending straightener inlet and outlet tension measuring device and measuring method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR664028A (en) * 1928-07-19 1929-08-28 Device to check the air pressure
GB378020A (en) * 1930-04-30 1932-08-02 British Thomson Houston Co Ltd Improvements in and relating to pressure measuring devices
GB1413115A (en) * 1972-01-12 1975-11-05 Walters D J Tyre pressure gauges

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR664028A (en) * 1928-07-19 1929-08-28 Device to check the air pressure
GB378020A (en) * 1930-04-30 1932-08-02 British Thomson Houston Co Ltd Improvements in and relating to pressure measuring devices
GB1413115A (en) * 1972-01-12 1975-11-05 Walters D J Tyre pressure gauges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MEASUREMENT TECHNIQUES, vol. 21, no. 2, février 1978, pages 238-240, Plenum Publishing Corporation, New York, US; A.Sh.KATSNEL'SON: "Dynamometric transducers based on granular conducting material contact resistances" *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5503023A (en) * 1990-07-18 1996-04-02 Robert Bosch Gmbh Pressure sensor for detecting the pressure in the combustion chamber of internal-combustion engines
US5249468A (en) * 1990-07-18 1993-10-05 Robert Bosch Gmbh Pressure sensor for detecting the pressure in the combustion chamber of internal combustion engines
WO1992001913A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine
WO1992001914A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine
WO1992001915A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine
WO1992001912A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in the combustion space of an internal-combustion engine
WO1992001916A1 (en) * 1990-07-18 1992-02-06 Robert Bosch Gmbh Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine
US5315875A (en) * 1990-07-18 1994-05-31 Robert Bosch Gmbh Pressure sensor for detecting the pressure in the combustion chamber of internal-combustion engines
WO1992015851A1 (en) * 1991-02-27 1992-09-17 Robert Bosch Gmbh Pressure sensor for determining the pressure in the combustion chamber of an internal combustion engine
WO2000031766A1 (en) * 1998-11-25 2000-06-02 Piab Ab Pressure control switch with conductive diaphragm
CN101780754B (en) * 2009-01-15 2015-06-17 黄腾文 Air leakage prevention tyre pressure detector
US20130084784A1 (en) * 2011-09-30 2013-04-04 Hon Hai Precision Industry Co., Ltd. Pressure detection device and polishing apparatus
US9109964B2 (en) * 2011-09-30 2015-08-18 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Pressure detection device and polishing apparatus
CN108931218A (en) * 2018-08-09 2018-12-04 东莞市协盛汽车配件科技有限公司 A kind of automobile component detection device and its detection method
CN116984417A (en) * 2023-09-26 2023-11-03 太原科技大学 Strip stretching bending straightener inlet and outlet tension measuring device and measuring method
CN116984417B (en) * 2023-09-26 2024-01-30 太原科技大学 Strip stretching bending straightener inlet and outlet tension measuring device and measuring method

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