WO2002021435A1

WO2002021435A1 - Equipment for the wireless numeric identification of metallic, namely ferromagnetic bodies

Info

Publication number: WO2002021435A1
Application number: PCT/CZ2000/000062
Authority: WO
Inventors: Vojtech Waleczek
Original assignee: R.T.S., Spol. S R.O.
Priority date: 2000-09-06
Filing date: 2000-09-06
Publication date: 2002-03-14
Also published as: AU2000268175A1

Abstract

The arrangement to the identification of a body or its position and/or direction of its motion in the space, comprising at least one reader with at least one aerial (9) and at least one transponder (13) connected to the said body. The aerial (9) and/or transponder (13) are embedded in an insulating mass. The said insulating mass for the said aerial (9) and/or transponder (13) creates a capsule based above all on a polymerized resin whereas the said capsule is imbedded in a hollow or in the opening (11) of said body and fixed by at least one anchor (12).

Description

EQUIPMENT FOR THE WIRELESS NI ERIC IDENTIFICATION OF METALLIC, NAMELY FERROMAGNETIC BODIES

Technical Field

The present invention concerns of the manufacturing control area and describes an arrangement enabling a faithful and contactless identification of metallic body and/or its space position in the environment comprising high level of electromagnetic backing signals or in the environment with the presence of vibrations, water, oil, lubricant or some chemically aggressive fluid etc.

Background Ait

There is well-known a great number of various identification systems used in the present times, enabling an easy and unambiguous identification of men, animals or articles or their positional detennination, numeration or the admeasurements of their lengths and next analogous acts, utilizing above all some of principles of the wireless identification, especially in the industry usage. These principles are based on the use of at least one identifier, registering the achievement of the predetermined position or another condition of the monitored object by the use of a relevant reader. There is able to pursue the said registration in a part by the manual operator of monitored apparatus or said registration can be realized by the means of the electronic registration mentioned above. To the number of units enabling the identification data collection and theirs further processing belongs transponders, too. These transponders are using e.g. the radio frequency data transmission in the system indicating as RFTD. There is well-known the use of said transponders for example to the vehicle identification and theirs effortless location at an auto theft (e.g. systems with the trade descriptions TROVAN or OCIS), to the identification of freight conveyances during of transit or to the vehicle identification at the fueling. The different use of transponders create the labeling of traffic containers to enable easy loading and following goods circulation till to customers, garbage pails labeling enabling single-valued identification of owner and/or lessee, sort of loaded waste and alike. The mentioned system is able to operate in described conditions and in dependence on the used type of reader, used type of transponder and eventually in dependence on the used speed of the said transponder movement in the face of reader till into the mutually distance about 2 meters. This read distance will depend on an appropriate existence of some electromagnetic backing disturbance of reader signals and on a positional orientation both of the transponder and reader. The presence of big metallic masses, especially ferromagnetic mass, creates the further meaningful factor adversely affecting the RFID communication and abbreviates rapidly the real reading distance. There are another negative suggestions, too, limiting the possibility of the utilization of transponders to the RFID identification method of bodies or theirs positions, typical for the metallurgical and machinery plants environment especially or for a chemical production eventually, for example high level of dustiness, presence of water, vibrations and/or shakings, high operational pressure, exuding lubricants or oils. The method of the identification described above is used in virtue of these limiting factors in a clean environment only and with the low level of the electromagnetic disturbance, relatively low mass of metallic articles or on another conditions mentioned above. There isn't available in principle a reliable electronic identification arrangement for the areas without potentiality of elimination or suppressing these negative effects warranting the proper long-term functioning and reliable capacity in specified conditions.

Disclosure of the Invention

Forenamed drawbacks eliminates in a dominant portion an arrangement to the wireless numeric identification of metallic, especially ferromagnetic body, its position and/or movement direction in a plan or space, consisting of at least one reader with at least once aerial and at least one transponder, where the said transponder is locked on the identified body.

The said reader working at a high speed of moving bodies rather at a high speed of transponders locked on or in the said bodies and can be connected to at least one transmitting aerial and at least one reception aerial having preferably the form of the rectangular parallelogram and/or embedded in an insulating mass capsule based e.g. on a polymerized resin.

The said transponder can be also embedded in a capsule from insulating mass and advantageously embedded in a hollow or opening of the body, mentioned above.

The most considerable advantage reachable via the utilizing of the equipment according to the present invention is possibility of the reliable contactless identification of monitored bodies. These bodies may be as well made from ferromagnetic materials and/or they can be situated in an environment with the occurrence of high metallic masses (e.g. mechanical arrangements). The following advantage creates a mechanical ruggedness of said equipment in the face of some mechanical shocks and/or vibrations not able to the eliminating in any other way, e.g. vibrations creating a part of the actually used production process or otherwise technology. The equipment described here is immune to the incidence of water, oil, greases or whatsoever chemically aggressive fluid. The substitution of one universal aerial by one transmitting aerial and one receiving aerial will do possible the conformation of the described equipment by this invention to the higher traffic speeds of the monitored body, namely till into c. 65 m/s^"1.

Brief Description of Drawings

The matter of solution of equipment to the wireless numeric identification of metallic, namely ferromagnetic bodies according to the present invention is in the following specified by the way of description of its exemplary fulfillment schematically figured in the connected drawings, where the fig. 1 presents the layout of a line to the production of ceramic fixtures used in the metallurgical production. Fig. 2 presents the schematized outline view on a detail for the mutual arrangement both of reader stand and linear grate conveyor. Fig. 3 shows an exemplary design of the receiving aerial. Fig. 4 illustrates a view of a part of steel grate with the side plate comprising anchors to embedding of the transponder; the side view of this arrangement illustrates the following fig. 5. Mode for Carrying Out of the Invention

There is in the schematic shape illustrated the exemplary embodiment of the equipment by the present invention on incorporated drawings. Fig. 1 presents the general ground plan view of the main part of the production line for ceramic fixtures for the metallurgy controlled by the not described and unspecified driving automatic means supporting movements of single cast-iron grates 10 visualized in the detailed view in fig. 4, 5 and wearing here not shown matrixes specified do the producing of said mentioned ceramic fixtures. The complete production line comprises three workplaces 1 for filing of matrixes, rinsing chamber 6, pressure chamber 7 and three dismounting workplaces 8 for matrixes with finished ceramic products. All presented technological centers are mutual connected with linear conveyers 2 represented in the described case by the roller conveyers with intermediary turntables 4 rotating in the selected multiple of the right angle. Turntables 4 are provided with four circumferential reader stands 5_ wearing on theirs walls near turntables 4 receiving aerials 2 connected to the electronic reader, not shown in the described figure. The detail of the mutual position both of the linear conveyer 2 and the reader stand > with the receiving aerial 2 is illustrated in the fig. 2. There is the cast-iron grate 10 placed on the roller __. of the linear conveyer 2 and its lateral surface is situated in the near of the receiving aerial positioned in the not shown opening of the reader stand _>. The receiving aerial 2 is at the same time manufactured as a rectangular symmetric dipole imbedded into the block of an insulating mass based on the polymerized resin and equipped with a cable to the connection with the said reader. Figs. 4 and 5 represent the ground plan and side-view projections of the cast-iron grate 10 with the shape opening 11 on its side comprising the imbedded transponder 1_>. The said transponder 23 is inserted in the insulating mass capsule based on a polymerized resin. The complex of transponder 23 with the insulating polymeric capsule is provided with a couple of connected anchors 12 inserted in identically formed bores at the side plate of the grate 10 and the face of the said transponder 23 H^{es in} t e same plain as the side plan of the said grate 10. The frontal layer of the insulating mass provides outward protection of the said transponder 1_. against the whatsoever mechanical damage. There is possibility to add 50 cast-iron grates 10 on the described production line altogether. Each of them bears at least one matrix, not illustrated in the presented drawings and designed for the stamping of ceramic products, not specified in detail. Number and type of these matrixes on the eveiy of said grates 10 is recorded after theirs mounting into the control computer. The filling all of matrixes on the operating grates 10 is realized at one of workplaces 1 and these grates 10 are subsequently transported by means of relevant one from conveyers 2 and turntables 4 into the rinsing chamber 6 and consequently into the pressure chamber 7. The whole round of manufacturing operations is finished on a matrix dismounting workplace 8. There are used variety of mixtures for filling of said matrixes with the sizable part of electrically conductive black lead (graphite) reacting during of common operations with water and oil as a difficult clearable blackwash. Said powdered mixtures are shredded in matrixes by the compulsory vibrations and in the following part of used technologic grates 10 said bearing matrixes are wash off by the strong water stream. The successive pressing in the pressure chamber 7 is realized until the pressure near to 500 bars with the use of compressive media inclusive of the admixture of 5% of oil, sealing up small slots with particles of pressing graphite mixtures. The considerable quantity of ferromagnetic mass of grates 10 and a big number of other ferromagnetic parts of said production line, for example linear conveyers 2, rollers 3_ and turntables 4 create the further factor making the reliable separate identification of said grates 10 or position each of said grates 10 in the producing line and turntables 4 more difficult. Both of the low speed of movements by the help of linear conveyers (c. 15 cm/s^" ) and the low production frequency (c. 1 grate/5 min) operate like positive factors to the enabling the described identification by the help of means mentioned above. On the ground of these reasons have been the maximal possibly distance between grates 10 and aerials fixed to 40 mm. The receiving aerial is embedded in the corresponding opening of the reader stand > to the protection against some of mechanical damages whereas the said reader stand _ bears the reader, too.

Industrial exploitation

The arrangement according to the described invention is usable with benefit to the wireless identification or positional identification of metallic, especially ferromagnetic bodies situated or moved in the dusty environment or in the environment with the presence of vibrations or shakings, moisture or water, oil or grease etc., generally in the heavy conditions of machinery or metallurgical plants, in the stoneware industry or industry of plastics, at the secondary processing of materials, etc.

The foregoing description of the foregoing embodiment of the present invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in the light of the above teachings. The embodiment was chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as is suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance breadth to which they are fairly, legally and equitably entitled.

Claims

1. The equipment to the wireless numeric identification of the metallic, namely ferromagnetic body, its position and/or its motion in a plane or space, consisting of at least one reader with at least one aerial (9) and at least one transponder (13) locked on the said body.

2. Equipment by the claim 1, where to the said reader is connected at least one transmitting aerial and at least one receiving aerial (9).

3. Equipment by the claim 1 or 2, where the said aerial (9) has the shape of a rectangular parallelogram.

4. Equipment by the at least one of claims from 1 to 3, where the said aerial (9) is imbedded in a capsule from an insulating mass.

5. Equipment by the claim 1, where the transponder (13) is imbedded in a capsule from an insulating mass.

6. Equipment by the claim 1, where the transponder (13) is suspended in a hollow or opening of the said body.

7. Equipment by the claim 3 or 4, where the insulating mass is based on a polymerized resin.

( - 3 drawings/5 figures - )