FR2794529A1 - Apparatus for measuring moisture content of e.g. sand, gravel and concrete, has bowl and ultrasonic sensor forming large part of bottom surface of bowl - Google Patents
Apparatus for measuring moisture content of e.g. sand, gravel and concrete, has bowl and ultrasonic sensor forming large part of bottom surface of bowl Download PDFInfo
- Publication number
- FR2794529A1 FR2794529A1 FR9907465A FR9907465A FR2794529A1 FR 2794529 A1 FR2794529 A1 FR 2794529A1 FR 9907465 A FR9907465 A FR 9907465A FR 9907465 A FR9907465 A FR 9907465A FR 2794529 A1 FR2794529 A1 FR 2794529A1
- Authority
- FR
- France
- Prior art keywords
- bowl
- measuring device
- probe
- tube
- type
- 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.)
- Granted
Links
- 239000004576 sand Substances 0.000 title claims description 4
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000523 sample Substances 0.000 claims description 18
- -1 gravel Substances 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 9
- 239000011810 insulating material Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
APPAREIL DE MESURE DU TAUX D'HUMIDITÉ DE MATÉRIAUX ET PRODUITS DU GENRE SABLE, GRAVIER, BÉTON, ETC ... APPARATUS FOR MEASURING THE MOISTURE RATE OF MATERIALS AND PRODUCTS OF THE SAND, GRAVEL, CONCRETE, ETC ... type
La présente invention concerne un appareil de mesure du taux d'humidité de matériaux et produits du genre sable, gravier, béton etc... The present invention relates to an apparatus for measuring the moisture content of materials and products of the sand, gravel, concrete, etc. type.
Elle concerne plus particulièrement un appareil ou appareillage de laboratoires qui permet d'effectuer rapidement des contrôles ou des mesures du taux d'humidité de produits et matériaux divers. It relates more particularly to a laboratory apparatus or apparatus which makes it possible to rapidly carry out checks or measurements of the humidity level of various products and materials.
Cet appareil selon l'invention comprend une capacité d'accueil ou récipient, en forme de bol, dont la surface du fond est constituée, pour une bonne partie, par le capteur lui-même et en particulier un capteur du type sonde hyperfréquence fonctionnant dans une bande UHF de 300 à 3000 MHZ. This device according to the invention comprises a receiving capacity or container, in the form of a bowl, the bottom surface of which consists, for a large part, of the sensor itself and in particular a sensor of the microwave probe type operating in a UHF band from 300 to 3000 MHZ.
Ce type de sonde est notamment décrit dans le document US-5 397 994 et correspond à un tube dont l'extrémité active se présente sous la forme d'une découpe oblique dudit tube. Au centre de cette découpe, on trouve une pastille métallique reliée au circuit électrique ; cette pastille est partiellement enrobée dans un matériau isolant qui remplit l'extrémité du tube, lequel tube est métallique, faisant office de masse. This type of probe is described in particular in document US Pat. No. 5,397,994 and corresponds to a tube whose active end is in the form of an oblique cut-out of said tube. In the center of this cutout, there is a metal patch connected to the electrical circuit; this pellet is partially coated with an insulating material which fills the end of the tube, which tube is metallic, acting as a mass.
Un tel appareil présente comme avantage d'être très simple d'utilisation car il suffit de déposer dans le bol, une quantité de matériaux suffisante pour couvrir le fond dudit bol et en particulier la pastille centrale et l'enveloppe métallique de la sonde. Cette quantité sera fixée par l'utilisateur lui-même en fonction de la nature des matériaux à contrôler. The advantage of such a device is that it is very easy to use because it suffices to deposit in the bowl, an amount of material sufficient to cover the bottom of said bowl and in particular the central tablet and the metal envelope of the probe. This quantity will be set by the user himself according to the nature of the materials to be checked.
Toujours selon l'invention, le bol est directement porté par le tube constituant la sonde, lequel tube est introduit dans un alésage qui s'étend jusqu'au niveau du fond dudit bol permettant de positionner la surface active de la sonde dans le plan dudit fond, laquelle surface active, qui est plane, forme la majeure partie dudit fond. Still according to the invention, the bowl is directly carried by the tube constituting the probe, which tube is introduced into a bore which extends to the level of the bottom of said bowl making it possible to position the active surface of the probe in the plane of said bottom, which active surface, which is planar, forms the major part of said bottom.
Toujours selon l'invention, le tube est guidé dans un moyeu support, lequel moyeu est par exemple monté sur un trépied et permet le guidage en rotation dudit tube sur un demi-tour afin de permettre un basculement du bol et sa vidange après une opération de mesure. Still according to the invention, the tube is guided in a support hub, which hub is for example mounted on a tripod and allows the rotational guidance of said tube over a half-turn in order to allow the bowl to tilt and be emptied after an operation. of measurement.
Toujours selon l'invention, le tube de la sonde est solidaire d'un manchon qui est lui-même guidé dans le moyeu porteur, lequel manchon comporte au moins une encoche coopérant avec un doigt escamotable dont l'extrémité, en forme d'ergot, permet de verrouiller le tube et de maintenir le bol dans sa position normale active pour effectuer la mesure. Still according to the invention, the probe tube is integral with a sleeve which is itself guided in the carrier hub, which sleeve has at least one notch cooperating with a retractable finger whose end, in the form of a lug , allows the tube to be locked and the bowl to be kept in its normal active position for taking the measurement.
Toujours selon l'invention, le bol est par exemple réalisé en matériau plastique isolant, du genre polypropylène de même que le moyeu et éventuellement le manchon. Still according to the invention, the bowl is for example made of insulating plastic material, of the polypropylene type, as is the hub and possibly the sleeve.
Selon une autre disposition de l'invention, le bol est associé, à sa partie inférieure, à un dispositif du genre vibreur qui permet de réaliser une agglomération du produit ou du matériau disposé dans ledit bol en vue d'améliorer la précision de la mesure du taux d'humidité. According to another arrangement of the invention, the bowl is associated, at its lower part, with a device of the vibrator type which makes it possible to agglomerate the product or the material placed in said bowl in order to improve the accuracy of the measurement. humidity level.
L'invention sera encore détaillée à l'aide de la description suivante et des dessins annexés, donnés à titre indicatif, et dans lesquels - la figure 1 est une vue générale en perspective de l'appareil selon l'invention ; - la figure 2 est une vue en coupe verticale du bol et de l'extrémité supérieure de la sonde de mesure ainsi que du moyeu porteur de ladite sonde. The invention will be further detailed with the aid of the following description and of the appended drawings, given by way of indication, and in which - FIG. 1 is a general perspective view of the apparatus according to the invention; - Figure 2 is a vertical sectional view of the bowl and the upper end of the measurement probe as well as the carrier hub of said probe.
Tel que représenté figure 1, l'appareil qui est plus particulièrement destiné à des laboratoires d'essais et d'études, comprend un pied support 1 qui porte, par l'intermédiaire d'un tube oblique 2, un bol 3 qui présente une capacité d'accueil suffisante de l'ordre de 5 à 6 litres par exemple et dans lequel on peut loger des matériaux et produits divers comme du sable, du gravier, du béton ou encore de la farine, du sucre, etc ... As shown in Figure 1, the device which is more particularly intended for testing and study laboratories, comprises a support leg 1 which carries, by means of an oblique tube 2, a bowl 3 which has a sufficient capacity of the order of 5 to 6 liters for example and in which we can accommodate various materials and products such as sand, gravel, concrete or even flour, sugar, etc ...
Ce bol 3, comme représenté figure 2 en coupe, présente une capacité de forme tronconique et son fond 4 comporte les moyens de mesure du taux d'humidité, et en particulier la surface active 5 d'un capteur constitué d'une sonde hyperfréquence. Cette sonde hyperfréquence se présente sous la forme d'un tube et en particulier du tube 2 qui sert en même temps de support au bol 3. Cette sonde hyperfréquence fonctionne dans la bande UHF de 300 à 3000 MHZ de préférence 700 MHZ. Cette sonde est notamment décrite dans le document US-5 397 994. This bowl 3, as shown in Figure 2 in section, has a frustoconical capacity and its bottom 4 includes the means for measuring the humidity, and in particular the active surface 5 of a sensor consisting of a microwave probe. This microwave probe is in the form of a tube and in particular of tube 2 which at the same time serves as a support for the bowl 3. This microwave probe operates in the UHF band from 300 to 3000 MHz, preferably 700 MHz. This probe is described in particular in document US Pat. No. 5,397,994.
Les matériaux et produits à contrôler sont introduits et disposés dans le bol 3 en particulier dans la capacité 6 de forme tronconique. Ils sont en contact direct avec la surface active 5 du capteur et, pour améliorer l'homogénéisation et surtout l'agglomération du produit et ainsi rendre plus efficace la mesure, on remarque, associé à la partie inférieure du bol 3, un dispositif vibreur 7 du type haute fréquence et faible amplitude, pour agglomérer, tasser et densifier le matériau et le produit dans le fond du bol 3. The materials and products to be checked are introduced and arranged in the bowl 3 in particular in the capacity 6 of frustoconical shape. They are in direct contact with the active surface 5 of the sensor and, to improve the homogenization and especially the agglomeration of the product and thus make the measurement more efficient, we note, associated with the lower part of the bowl 3, a vibrating device 7 of the high frequency and low amplitude type, for agglomerating, compacting and densifying the material and the product in the bottom of the bowl 3.
Le tube 2 est emmanché à son extrémité supérieure, dans une cavité du bol 3, verrouillé sur le bol par tout moyen approprié, collage ou vis pointeau. The tube 2 is fitted at its upper end, in a cavity of the bowl 3, locked on the bowl by any suitable means, bonding or needle screw.
La surface active 5 du tube-sonde est plane et de forme elliptique. En effet, cette surface active correspond à une découpe oblique du tube 2. The active surface 5 of the probe tube is flat and elliptical in shape. Indeed, this active surface corresponds to an oblique cut of the tube 2.
Le tube 2 est incliné de 30 à 45 par exemple par rapport à l'horizontale, et sa découpe est horizontale dans le fond du bol, lorsque ce dernier est en position normale permettant la réalisation d'une mesure. The tube 2 is inclined from 30 to 45 for example relative to the horizontal, and its cut is horizontal in the bottom of the bowl, when the latter is in the normal position allowing a measurement to be made.
Le diamètre du tube 2 est de l'ordre de la moitié du diamètre du fond 4 du bol 3. The diameter of the tube 2 is of the order of half the diameter of the bottom 4 of the bowl 3.
La pastille métallique 8 qui se situe au centre de la surface 5 de la sonde est enrobée partiellement dans un matériau isolant qui remplit l'extrémité du tube 2, lequel tube, métallique également, fait office de masse pour ladite sonde. Le tube support 2 est monté dans un moyeu 9 qui se présente sous la forme d'une grosse douille réalisée en matériau plastique du genre polypropylène. Ce moyeu 9 comporte un orifice 10 qui permet son montage sur le pied support 1. The metal patch 8 which is located in the center of the surface 5 of the probe is partially coated with an insulating material which fills the end of the tube 2, which tube, also metallic, acts as a mass for said probe. The support tube 2 is mounted in a hub 9 which is in the form of a large bush made of plastic material of the polypropylene type. This hub 9 has an orifice 10 which allows it to be mounted on the support leg 1.
Le tube support 2 comporte une bague 12 qui est fixée par tout moyen approprié. Cette bague 12 est guidée dans le moyeu 9, dans une cavité 13 de ce moyeu et elle comporte au moins une encoche 14 qui coopère avec un doigt 15 escamotable et dont l'ergot d'extrémité forme une sorte de verrou pour, en position active, immobiliser le bol dans sa position normale active de mesure, et, en position inactive, le libérer après la mesure, afin de permettre une rotation du tube support 2 et ainsi un basculement du bol dans le but de le vider de son contenu.The support tube 2 comprises a ring 12 which is fixed by any suitable means. This ring 12 is guided in the hub 9, in a cavity 13 of this hub and it comprises at least one notch 14 which cooperates with a retractable finger 15 and whose end lug forms a sort of lock for, in the active position , immobilize the bowl in its normal active measurement position, and, in the inactive position, release it after the measurement, in order to allow rotation of the support tube 2 and thus a tilting of the bowl in order to empty it of its contents.
Le bol 3 est réalisé en matériau plastique isolant du genre polypropylène, ainsi que le moyeu 9 et la bague 12. The bowl 3 is made of insulating plastic material of the polypropylene type, as well as the hub 9 and the ring 12.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9907465A FR2794529B1 (en) | 1999-06-07 | 1999-06-07 | APPARATUS FOR MEASURING THE MOISTURE RATE OF MATERIALS AND PRODUCTS OF THE KIND, GRAVEL, CONCRETE, ETC ... |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9907465A FR2794529B1 (en) | 1999-06-07 | 1999-06-07 | APPARATUS FOR MEASURING THE MOISTURE RATE OF MATERIALS AND PRODUCTS OF THE KIND, GRAVEL, CONCRETE, ETC ... |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2794529A1 true FR2794529A1 (en) | 2000-12-08 |
FR2794529B1 FR2794529B1 (en) | 2001-08-17 |
Family
ID=9546720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9907465A Expired - Fee Related FR2794529B1 (en) | 1999-06-07 | 1999-06-07 | APPARATUS FOR MEASURING THE MOISTURE RATE OF MATERIALS AND PRODUCTS OF THE KIND, GRAVEL, CONCRETE, ETC ... |
Country Status (1)
Country | Link |
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FR (1) | FR2794529B1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1068166A (en) * | 1962-12-30 | 1967-05-10 | Shinichi Sasaki | Method of and apparatus for measuring moisture content of granular materials |
US4203067A (en) * | 1977-03-30 | 1980-05-13 | Bayer Aktiengesellschaft | Apparatus for determining the water content of isotropic materials by means of microwave absorption |
US4206399A (en) * | 1977-04-09 | 1980-06-03 | Bayer Aktiengesellschaft | Apparatus for determining the water content of isotropic materials by means of microwave absorption |
US5256978A (en) * | 1992-04-27 | 1993-10-26 | Mitchell Rose | Microwave moisture content analyzer |
US5397994A (en) * | 1993-12-28 | 1995-03-14 | Alkon Corporation | Moisture measurement gauge for particulates including a transmission line forming part of a resonant circuit |
-
1999
- 1999-06-07 FR FR9907465A patent/FR2794529B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1068166A (en) * | 1962-12-30 | 1967-05-10 | Shinichi Sasaki | Method of and apparatus for measuring moisture content of granular materials |
US4203067A (en) * | 1977-03-30 | 1980-05-13 | Bayer Aktiengesellschaft | Apparatus for determining the water content of isotropic materials by means of microwave absorption |
US4206399A (en) * | 1977-04-09 | 1980-06-03 | Bayer Aktiengesellschaft | Apparatus for determining the water content of isotropic materials by means of microwave absorption |
US5256978A (en) * | 1992-04-27 | 1993-10-26 | Mitchell Rose | Microwave moisture content analyzer |
US5397994A (en) * | 1993-12-28 | 1995-03-14 | Alkon Corporation | Moisture measurement gauge for particulates including a transmission line forming part of a resonant circuit |
Non-Patent Citations (1)
Title |
---|
"MIKROWELLENFEUCHTEMESSUNG IN DER BETONBEREITUNG. MICROWAVE MOISTUREMEASUREMENT IN CONCRETE PREPARATION", BETONWERK + FERTIGTEIL TECHNIK,DE,BAUVERLAG GMBH. WIESBADEN, vol. 64, no. 3, 1 March 1998 (1998-03-01), pages 212 - 214, XP000741398, ISSN: 0373-4331 * |
Also Published As
Publication number | Publication date |
---|---|
FR2794529B1 (en) | 2001-08-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |
Effective date: 20080229 |