SK125493A3 - Device and connection for electronic marking of objects - Google Patents

Abstract

The object is to create a method and a circuit arrangement for coding marking means in a contactless manner and to ensure a wide variety of applications in technical processes. The object is achieved by designing n switchable passive resonators (1) with the respectively assigned detection frequencies and burn-out frequencies as an array and by coding the n resonators in a specifically contactless manner by switching on electromagnetic fields with j of n frequencies. <IMAGE>

Description

Method and connection for electronic marking of objects

Technical field

The invention relates to a method for electronically marking objects by passive resonators by means of electromagnetic fields and to a circuit for carrying out the method.

BACKGROUND OF THE INVENTION

Electronic devices for marking articles are already known which are used to control the movement of goods in department stores. These devices are mounted on the goods and cause an acoustic signal to be emitted when the entrance or exit point of a department store, narrowed to the passage of only one person at a time, is meant by the marked goods. U.S. Pat. No. 4,920,335 proposes an electronic object inspection device comprising a planar microwave resonator. The resonator (parallel resonant circuit) is placed as a mark on the object.

The fixed frequency electromagnetic wave allows the resonance current distribution to be detected, thereby distinguishing the marked object from those without the mark. The resonant behavior of the mark is electrically switched off by having the second electromagnetic field of a different frequency (Burn-out Frequency) set the circuit to interrupt the resonator line. The tag remains on the subject.

The disadvantage of this solution is that only one simple decision is possible, namely the brand is present or not. Only the irreversible tripping of the resonator is possible at the tripping frequency. Thus, the applicability of the proposed solution is very limited.

Furthermore, DE 30 23 446 C2, DE-OS 19 05 008, US 3,752.960 describes methods for electronically marking articles in which multiple resonators are used for coding articles. There are essentially described two methods and connections for detecting coded resonant circuits. The solutions assume the use of transmitters, modulation generators, phase detectors, etc. Coding is done in these solutions by touch, direct contact with the object is required. No contact coding of passive circuits is possible with the proposed solutions.

In many technical processes, e.g. in automated production, piece goods handling and piece goods distribution at freight transshipment points, warehouses, it is necessary to organize their course simply by marking objects without changing these objects themselves, furthermore, flexible contact-free coding of marks without direct intervention on of the object and its smooth removal and quick recognition of the code without directly interfering with the object.

Known devices only partially meet these requirements.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method and engagement of the aforementioned kind, which will provide multiple decision options through flexible non-contact coding of the marking means and ensure a wide usability in technical processes.

This object is achieved according to the invention by being arranged

- J n switchable resonators (1), consisting of detection resonators (2) with always associated detection frequencies fii (i = 1, 2, ......, n) and asn trip resonators (3) with always assigned trip frequency f 12 (i-1, 2, ......, n) arranged as a matrix and that n detection resonators (2) when connecting electric fields (5) with 1 <j <nz trip resonators (3).

Arranging a plurality of resonators in a matrix allows resonator coding to be flexible according to the application. The projections provided with the coded marks can be recognized without contact by means of electromagnetic fields, and the reaction of the coded marks to one electromagnetic field is evaluated in one detection station. Corresponding methods are known for this purpose.

Further advantageous embodiments of the invention result from the subclaims.

Overview of the figures in the drawing

The invention will be explained in more detail below by way of example with reference to the drawings.

In FIG. 1 schematically illustrates the connection of a detection and tripping resonator to one switchable resonator.

In FIG. 2 shows schematically the connection of n switchable resonators according to FIG. First

In FIG. 3 schematically shows the planar arrangement of the switchable resonators of FIG. First

In FIG. 4 is a schematic illustration of the switchable resonator arrangement of FIG. 1 in a multilayer embodiment.

In FIG. 5 is a schematic of the resonator of FIG.

In FIG. 6 is a schematic of the switchable resonator of FIG.

In FIG. 7 shows the resonator of FIG. 1. 5. 6.

top side representation 1.

1 and FIG. 5th

switchable circuit diagram

In FIG. 1 shows a schematic representation of a switchable resonator 6, which is made up of a detection resonator 2 at a frequency f 1 and a trip resonator 3 with a fis on a connection carrier 4. The detection detecting trip f f and trip f and the tripping frequency 12 12 are the resonant frequencies of the respective resonators 2, 3.

The connection n> 2 of such switchable resonators 6 according to FIG. 1 forms a connection, respectively. circuit for the electronic marking of objects according to FIG. 2, where i = 1, 2, 3,. . . , n denotes the number of switchable resonators 6. In FIG. 2, therefore, n spinable resonators 8 have the following frequencies:

DETAILED DESCRIPTION OF THE INVENTION

The first switchable resonator 6 has resonant frequencies f1, f12, the second switchable resonator 6 has resonant frequencies f2i, f22, and the nth switchable resonator 8 has resonant frequencies f1i, fn2. The switching states of which resonator 6 are recognized by analyzing its response to the electromagnetic field 5 (FIG. 1) of the detection frequency fii. The change from the original state of the switchable resonator 6 is caused by exposure to the electromagnetic pole 5 of the switch-off frequency f 2, which causes an irreversible change in the switch-off resonator 3 and thereby alters the detection resonator 2 so that its changed response to the i is recognized.

respectively. can be recognized.

For a non-contacting arrangement of 2 n switches of other resonators (as shown in Fig. 2), the arrangement is exposed to an electromagnetic alternating pole of 1 <j <n frequencies 2 of a plurality of detection frequencies f11; i = 1, 2, 3, ..., n. By changing the status of the respective trip resonators 3 and changing the respective detection resonators 2, the switchable resonators 1 are made into a recognizable other switching state. Thus, in some of the circuit according to FIG. 2. feasible different states and thus realized with the given value range for the variable j n

j = 0 code elements; j = 0 means that no field has been applied, therefore the arrangement of switchable resonators zost remains in its original state.

In FIG. 3 shows the wiring of a plurality of switchgear resonators 6 of the flat surface. In order to minimize the need for the area, the switchable resonators 7 are also made in an arrangement with at least a partial surface overlap

The liner or on the carrier 4 may be more in layered form (Fig. 4).

wiring of 2 consists of

In FIG. 5 shows the upper side and FIG. 6 shows the underside of the switchable resonator 1, which is designed as a flat connection on the surface of the dielectric material carrier 4. A capacitor coil detection resonator 8, whose stickers 6, 7 are located on the top and bottom of the wiring support 4. At the locations 10 the wiring support 4 is connected and thus represents the connection between the copper end of the coil on the top and the capacitor sticker 7 on the underside. The coil S and the capacitor of the stickers 6, 7 thus form a detection parallel resonant circuit.

a switch carrier 4, a tripping resonator 3, as a planar A / 2 film of the electromagnetic wave length,

Furthermore, it is located on which the dipole 11 is provided, for example, as a thin guide, Λ being the wavelength by which the trip resonator 7 changes in its function. The film, the resonator 3, is so narrowed at the location that forms the planar A / 2 of the maximum current trip 12 that when excited by the electromagnetic wave frequency of the trip resonator 3, the film at this location 12 due to the high current density burns. By interconnecting the switchable resonator 1 at the locations 10, the coil 8 is shorted by a bridge 13 and thus the parallel connection from the coil 8 and the capacitor acts as a parallel detection resonant circuit.

In FIG. 7 shows a replacement circuit diagram for a switchable resonator 1 with an inductance L corresponding to the coil 8 in FIG. 5, and with a capacity C corresponding to the capacitor labels 6, 7 in FIG. 6 of a parallel detection resonant circuit and with a switching element S formed by a tripping point 12 in the center of the planar Λ / 2 tripping resonator 3 (FIG. 5).

Claims (4)

PATENT Claims fv ηε-h-ν Method for electronically marking objects by passive resonators by means of electromagnetic fields, characterized in that n switches 1 (1) are arranged, consisting of n detecting signifying resonator resonators (2), each associated with a detection frequency fii .... n) asn tripping resonators (3) with tripping frequencies fi2 (i = 1, 2, .... n) each arranged as a matrix and that n detection resonators (2) when connecting electromagnetic fields (5) with 1 <j <n tripping (i = 1, 2, in case of sequence if i i i of tripping frequencies fii is coded without contact by changing the state of tripping resonators (3). Method according to claim 1, characterized in that the matrix is made up of resonators (1) whose components react with detection frequencies fn and which are switched on by the respective resonators (3) and are also characterized by at least two switchable Connection for carrying out the method according to claims 1 and 2, characterized in that the n switchgear resonators (1) are arranged flat and / or in several layers in the nut. Connection according to claim 3, characterized in that you switch other resonators (1) of the matrix from the connection of at least one detection resonator (3). The resonator is always formed with 2) p