FR2930989A1 - Mobile vertical load measuring device, has strain gauges directly equipping post, where device carries out subtraction of forces at level of sections arranged at equal distance from support points on hyperstatic horizontal post - Google Patents
Mobile vertical load measuring device, has strain gauges directly equipping post, where device carries out subtraction of forces at level of sections arranged at equal distance from support points on hyperstatic horizontal post Download PDFInfo
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- FR2930989A1 FR2930989A1 FR0802527A FR0802527A FR2930989A1 FR 2930989 A1 FR2930989 A1 FR 2930989A1 FR 0802527 A FR0802527 A FR 0802527A FR 0802527 A FR0802527 A FR 0802527A FR 2930989 A1 FR2930989 A1 FR 2930989A1
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- load
- measuring device
- electric resistance
- post
- strain gauge
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- 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.)
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- 238000005259 measurement Methods 0.000 claims abstract description 22
- 238000005452 bending Methods 0.000 claims abstract description 6
- 230000035945 sensitivity Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 244000045947 parasite Species 0.000 claims 1
- 238000010008 shearing Methods 0.000 abstract 1
- 238000005303 weighing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/1402—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
- G01G3/1404—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports combined with means to connect the strain gauges on electrical bridges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/022—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing wheeled or rolling bodies in motion
- G01G19/024—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing wheeled or rolling bodies in motion using electrical weight-sensitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/04—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles
- G01G19/045—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles for weighing railway vehicles in motion
- G01G19/047—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles for weighing railway vehicles in motion using electrical weight-sensitive devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
DISPOSITIF DE PESAGE AU DÉFILÉ Domaine de l'invention La présente invention concerne un dispositif de mesures de charges mobiles au défilé se déplaçant sur une poutre horizontale reposant sur deux ou plusieurs appuis. Les charges verticales peuvent, sur cette poutre horizontale, se déplacer Soit, longitudinalement le long de cette poutre ; Soit, perpendiculairement à cette poutre. Le principe des mesures repose sur l'utilisation adaptée et particulière de la théorie de 10 la flexion des poutres avec des montages électriques utilisant des jauges à variation de résistance électrique placées à des endroits adéquats. Brève description de l'antériorité D'une façon générale, les charges roulantes sont mesurées à l'aide de ponts-bascules ou de systèmes équivalents de manière statique, ce qui implique, entre autres : 15 Des coûts importants, voire des itinéraires spécifiques pour accéder aux aires de pesage ; Des pertes de temps liées aux nécessités d'immobilisation sur l'aire de pesage pendant la pesée et des dépenses de personnel affecté à ce genre de mesures (non automatique) 2.0 Pour la mesure de charges mobiles sur une poutre horizontale utilisant la poutre comme transducteur de mesures, jusqu'à maintenant, aucun brevet n'a été déposé. Seul, pour la détection des charges verticales et non pour leur mesure, le brevet européen N°D324218B1 a été délivré le 15-01-1988. Cependant, depuis cette époque, les innovations dans le domaine des jauges à 25 variation de résistance permettent, aujourd'hui, de s'affranchir d'erreurs dues à leur manque de sensibilité (influence des changements de température, fatigue, vieillissement, changements et déplacements progressifs dus au manque d'efficacité du collage, etc.) A ce jour, il est possible d'utiliser ce genre de montages pour des mesures précises. De plus, le traitement électronique des données et des résultats a nettement 30 évolué. Ce qui a permis de mettre en oeuvre de manière optimale les montages électriques pour réaliser les pesées instantanées des charges mobiles. Avantageusement, le dispositif de mesure de charges à jauges de contraintes à variateur de résistance électrique selon l'invention dispose d'un moyen de mesure de charges ces dernières étant mobiles permettant de fournir dans chaque section de 35 mesure : 1 - soit des contraintes de compression et de traction égales mais de signes opposés, - soit des contraintes de cisaillement de signe opposé, ledit moyen est constitué d'un montage électrique en pont de Wheatstone permettant d'obtenir un signal d'une excellente sensibilité et est indépendant de la position de la charge à mesurer sur la poutre pourvu que la position de la charge se situe entre deux sections de mesure ; la valeur mesurée de la charge est indépendante de la position de la charge pourvu que la position de la charge se situe entre les deux sections de mesures. FIELD OF THE INVENTION The present invention relates to a device for measuring moving loads on a parade moving on a horizontal beam resting on two or more supports. The vertical loads can, on this horizontal beam, move either longitudinally along this beam; That is, perpendicular to this beam. The principle of the measurements relies on the adapted and particular use of the theory of the bending of the beams with electrical assemblies using gages with variation of electric resistance placed at suitable places. Brief description of prior art In general, rolling loads are measured by weighbridges or equivalent systems statically, which implies, inter alia: Significant costs, or even specific routes for access to weighing areas; Loss of time related to the need for immobilization on the weighing area during weighing and personnel costs for such measures (non-automatic) 2.0 For the measurement of moving loads on a horizontal beam using the beam as a transducer Until now, no patent has been filed. Only for the detection of vertical loads and not for their measurement, European Patent No. D324218B1 was issued on 15-01-1988. However, since that time, innovations in the field of resistance variation gages have made it possible today to overcome errors due to their lack of sensitivity (influence of temperature changes, fatigue, aging, changes and progressive displacements due to the lack of efficiency of the gluing, etc.) To date, it is possible to use this kind of montages for precise measurements. In addition, the electronic processing of data and results has changed significantly. This made it possible to optimally implement electrical assemblies for instantaneous weighing of mobile loads. Advantageously, the strain gauge load measuring device with an electrical resistance controller according to the invention has a means of measuring charges, the latter being mobile, making it possible to provide, in each measuring section, either: compression and traction equal but opposite signs, - or shear stresses of opposite sign, said means consists of a Wheatstone bridge electrical mounting to obtain a signal of excellent sensitivity and is independent of the position the load to be measured on the beam provided that the position of the load is between two measuring sections; the measured value of the load is independent of the position of the load provided that the position of the load is between the two measurement sections.
Préférentiellement, la distance entre les deux sections de mesure est supérieure à la distance séparant les roues d'un même essieu, permettant de mesurer la charge par essieu et la charge par véhicule constitué de la somme des charges des essieux mesurées au défilé. Selon un mode de réalisation, ledit dispositif est complété par un lecteur enregistreur connecté au signal de sortie du pont de mesures (pont de Wheatstone), ledit lecteur enregistreur comportant l'alimentation électrique, les filtres, les amplificateurs, le traitement du signal avec affichage de la charge maxi, l'enregistreur. Selon un autre mode de réalisation, lesdites poutres sont constituées de moyens de positionnement de ladite poutre en hauteur, permettant de mesurer au défilé des 20 charges suspendues. Selon un mode préféré de réalisation, ledit dispositif est constitué d'un moyen de détecter le seuil de la charge mesurée, permettant d'utiliser le dispositif à effort tranchant sur les voies de chemin de fer, en utilisant au moins un rail, pour servir d'avertisseur d'arrivée de trains à grande distance, avec un système amovible de jauges à 25 pose rapide fixé au niveau de la fibre neutre du rail. Brève description des dessins D'autres caractéristiques et avantages de l'invention seront mieux compris à la lecture de la description qui va suivre, d'un exemple de réalisation selon l'invention en se référent aux dessins annexés (Planche 1 à 4).sur lesquels : 30 Planche 1 et 2 : Dispositif à moment fléchissant Utilisable pour le pesage des charges verticales mobiles se déplaçant sur une poutre posée sur deux appuis (poutre isostatique) Considérons une poutre AB situé sur deux appuis horizontaux A et B et sur laquelle se déplace une charge Q .Preferably, the distance between the two measurement sections is greater than the distance separating the wheels of the same axle, for measuring the axle load and the load per vehicle consisting of the sum of the loads of the axles measured at the parade. According to one embodiment, said device is completed by a recording reader connected to the output signal of the measurement bridge (Wheatstone bridge), said recording reader comprising the power supply, the filters, the amplifiers, the signal processing with display of the maximum load, the recorder. According to another embodiment, said beams consist of positioning means of said beam height, to measure the parade of 20 suspended loads. According to a preferred embodiment, said device consists of a means for detecting the threshold of the measured load, making it possible to use the shear force device on the railway tracks, using at least one rail, to serve long-distance train arrival alarm, with a removable rapid-setting gauge system attached to the neutral fiber of the rail. BRIEF DESCRIPTION OF THE DRAWINGS Other characteristics and advantages of the invention will be better understood on reading the following description of an exemplary embodiment according to the invention with reference to the appended drawings (Plate 1 to 4). on which: Plate 1 and 2: Device with bending moment Usable for weighing moving vertical loads moving on a beam placed on two supports (isostatic beam) Consider an AB beam located on two horizontal supports A and B and on which move a charge Q.
35 Soient deux secteurs de mesure a et f3 situés à égale distance des appuis A et B, Les moments fléchissant respectivement en a et G3 sont Ma et M p .Are two measurement sectors a and f3 located equidistant from the supports A and B. The bending moments respectively at a and G3 are Ma and M p.
2 On démontre facilement que Ma + M p =Q lorsque la charge Q se déplace entre a et P. De ce fait, on applique les lois de l'extensométrie, avec un montage en pont complet (pont de Wheatstone) pour annuler les effets de variations de température et en doublant la mesure (avec des jauges de part et d'autre de la poutre pour annuler les effets éventuels de torsion) on obtient un signal proportionnel à Q que l'on traitera électroniquement ensuite pour obtenir exactement sa valeur en poids ou en masse (N ou kg) Planche 3 et 4 : Dispositif à effort tranchant Utilisable pour le pesage des charges verticales mobiles se déplaçant sur une posée sur plusieurs appuis (poutre hyperstatique) De même, considérons une poutre AB située sur plusieurs appuis horizontaux consécutifs Al, A2..., Ai, Ai+i..., An et supposons que la charge verticale Q se déplace 15 entre a et fi deux secteurs de mesure situés à une même distance "a" des appuis Ai et Ai+i. Les efforts tranchants respectivement en a et B sont Ta et Fo . On démontre aisément que r -Tp = Q lorsque la charge Q se déplace entre a et R. De ce fait, en appliquant les lois de l'extensométrie avec un montage en pont complet (pont de Wheatstone) pour annuler les efforts des variations de température 20 et en doublant la mesure (avec des jauges de part et d'autre de la poutre pour annuler les effets éventuels de torsion) on obtient un signal proportionnel à Q que l'on traitera ensuite électroniquement pour obtenir exactement sa valeur.2 It is easily demonstrated that Ma + M p = Q when the charge Q moves between a and P. As a result, the laws of extensometry are applied, with a full bridge arrangement (Wheatstone bridge) to cancel the effects. of temperature variations and doubling the measurement (with gauges on either side of the beam to cancel the possible effects of torsion) we obtain a signal proportional to Q that we will treat electronically then to obtain exactly its value in weight or mass (N or kg) Plate 3 and 4: Device with shear force Usable for the weighing of the moving vertical loads moving on a laid on several supports (hyperstatic beam) Similarly, consider a beam AB located on several horizontal supports Consecutive Al, A2 ..., Ai, Ai + i ..., An and assume that the vertical load Q moves between a and fi two measuring sectors located at the same distance "a" supports Ai and Ai + i. The sharp forces respectively in a and B are Ta and Fo. It is easily demonstrated that r -Tp = Q when the charge Q moves between a and R. Therefore, by applying the laws of extensometry with a full bridge (Wheatstone bridge) to cancel the forces of the variations of temperature 20 and doubling the measurement (with gauges on either side of the beam to cancel the possible effects of torsion) we obtain a signal proportional to Q which will then be treated electronically to obtain exactly its value.
25 REMARQUE : Lorsque la charge Q se déplace perpendiculairement à la poutre, si on veut linéariser le signal afin d'obtenir exactement le maximum de Q, il convient d'utiliser une poutre de section rectangulaire à profil creux plutôt qu'une poutre de section en I. On peut mesurer plusieurs charges y compris leur somme à condition que les charges 30 se trouvent toutes entre les sections de mesure a et B. Dans cet exposé, la poutre horizontale utilisée comme transducteur de mesures est sur appuis mais cette poutre horizontale peut être suspendue. Les résultats sont identiques, L'étalonnage se fait à l'aide de charges de référence.NOTE: When load Q moves perpendicular to the beam, to linearise the signal in order to obtain exactly the maximum of Q, it is advisable to use a beam of rectangular section with hollow profile rather than a beam of section in I. It is possible to measure several charges including their sum provided that the charges 30 are all between the measuring sections a and B. In this presentation, the horizontal beam used as a transducer is on supports but this horizontal beam can to be suspended. The results are identical. The calibration is done using reference loads.
3 APPLICATIONS ; - Charges ferroviaires : On peut mesurer les charges par essieu en utilisant le rail comme poutre de mesures (dispositif à effort tranchant ) les sections de mesure a et (3 (planche 1 et 2) étant situées dans le même créneau entre deux traverses. - Charges routières : On peut mesurer les charges par essieu en utilisant une poutre incluse dans la chaussée sans contacts latéraux et appuyée aux deux extrémités de cette chaussée. Le dispositif à moment fléchissant avec une poutre à section rectangulaire creuse est particulièrement adaptée. - On peut également envisager des applications pour les charges supportées par les ponts roulants ou les systèmes suspendus (quartiers de viande dans les abattoirs, sacs de linge dans les grandes laveries, etc.) - Ce dispositif peut également servir à enregistrer une surcharge sur un pont roulant afin d'en conserver la traçabilité. - En sortie d'autoroute, pesage de véhicules et détection du poids des surcharges éventuelles, - Sur une voie de chemin de fer, pour avertir les équipes de maintenance travaillant sur la voie, on peut se servir du montage à effort tranchant . En effet, on peut l'installer sur le rail entre deux traverses en le reliant à un émetteur qui pourra déclencher à distance un récepteur sonore au niveau du chantier au passage d'une circulation à la distance nécessaire pour dégager le personnel et les machines de travail, 4 • 3 APPLICATIONS; - Railway Loads: Axle loads can be measured by using the rail as a measurement beam (shear force device) with measurement sections a and (3 (Plate 1 and 2) being located in the same gap between two sleepers. Road Loads: It is possible to measure axle loads using a beam included in the roadway without lateral contacts and supported at both ends of this roadway.The bending moment device with a hollow rectangular section beam is particularly suitable. consider applications for loads supported by overhead cranes or suspended systems (slaughterhouse meat quarters, laundry bags at large laundries, etc.) - This device can also be used to record an overhead load on a traveling crane in order to traceability - On leaving the motorway, weighing vehicles and detecting the weight of possible overloads s, - On a railway line, to warn maintenance crews working on the track, it is possible to use the shear force assembly. Indeed, it can be installed on the rail between two ties by connecting it to a transmitter that can remotely trigger a sound receiver at the construction site at the passage of traffic at the distance needed to clear the staff and machines of work, 4 •
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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FR0802527A FR2930989B1 (en) | 2008-05-07 | 2008-05-07 | SCALE WEIGHING DEVICE |
Applications Claiming Priority (1)
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FR0802527A FR2930989B1 (en) | 2008-05-07 | 2008-05-07 | SCALE WEIGHING DEVICE |
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FR2930989A1 true FR2930989A1 (en) | 2009-11-13 |
FR2930989B1 FR2930989B1 (en) | 2011-08-19 |
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FR0802527A Active FR2930989B1 (en) | 2008-05-07 | 2008-05-07 | SCALE WEIGHING DEVICE |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011055076A1 (en) * | 2009-11-06 | 2011-05-12 | Centre National De La Recherche Scientifique | Device for determining the weight of an object |
CN114720036A (en) * | 2022-03-11 | 2022-07-08 | 中国航发沈阳发动机研究所 | Aeroengine redundant mounting beam structure load calibration method and device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1376776A (en) * | 1963-09-27 | 1964-10-31 | Sands Measurement Corp | Weighing apparatus and, in particular, weighing apparatus for moving loads |
CA994374A (en) * | 1972-11-20 | 1976-08-03 | Conrail Ab | Weighing device |
GB1518359A (en) * | 1977-02-02 | 1978-07-19 | Strainstall Ltd | Force measurement |
EP0324218A1 (en) * | 1988-01-15 | 1989-07-19 | George Barry Bolland | Weight sensing apparatus |
EP0500971A1 (en) * | 1991-02-25 | 1992-09-02 | Carl Schenck Ag | Method of weighing |
DE4117924C1 (en) * | 1991-05-31 | 1992-12-17 | Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De | Vertical and side force components measuring appts. for railway vehicle wheel - achieves simultaneous evaluation using circuits coupled to expansion measuring strips applied to opposite sides of crown of rail |
-
2008
- 2008-05-07 FR FR0802527A patent/FR2930989B1/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1376776A (en) * | 1963-09-27 | 1964-10-31 | Sands Measurement Corp | Weighing apparatus and, in particular, weighing apparatus for moving loads |
CA994374A (en) * | 1972-11-20 | 1976-08-03 | Conrail Ab | Weighing device |
GB1518359A (en) * | 1977-02-02 | 1978-07-19 | Strainstall Ltd | Force measurement |
EP0324218A1 (en) * | 1988-01-15 | 1989-07-19 | George Barry Bolland | Weight sensing apparatus |
EP0500971A1 (en) * | 1991-02-25 | 1992-09-02 | Carl Schenck Ag | Method of weighing |
DE4117924C1 (en) * | 1991-05-31 | 1992-12-17 | Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De | Vertical and side force components measuring appts. for railway vehicle wheel - achieves simultaneous evaluation using circuits coupled to expansion measuring strips applied to opposite sides of crown of rail |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011055076A1 (en) * | 2009-11-06 | 2011-05-12 | Centre National De La Recherche Scientifique | Device for determining the weight of an object |
FR2952433A1 (en) * | 2009-11-06 | 2011-05-13 | Centre Nat Rech Scient | DEVICE FOR DETERMINING THE WEIGHT OF AN OBJECT |
CN114720036A (en) * | 2022-03-11 | 2022-07-08 | 中国航发沈阳发动机研究所 | Aeroengine redundant mounting beam structure load calibration method and device |
CN114720036B (en) * | 2022-03-11 | 2023-08-18 | 中国航发沈阳发动机研究所 | Load calibration method and device for redundant mounting beam structure of aero-engine |
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Publication number | Publication date |
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FR2930989B1 (en) | 2011-08-19 |
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