RU184400U9 - ELECTRONIC RADIO FREQUENCY SEAL - Google Patents

Abstract

The seal contains a radio-transparent case with a through hole, a radio-frequency tag placed in the case, including an RFID chip and an antenna electrically connected to it, a seal lock on the protected object in the form of a flexible elastic strip, one end of which is rigidly connected to the case, and the other end is in the working position pinched in said through hole, and a signal transmission line built into said strip. To maintain the availability of the identification record for reading against the background of a forced break in the signal transmission line, this line is connected to the RFID chip via a trigger latch, and the antenna is connected to the RFID chip independently of the signal transmission line. 1 s.p. f-ly, 3 ill.

Description

Technical field

The utility model relates to the design of passive electronic RFID seals for marking and tracking the movements of metal disks used in pneumatic wheels of freight and passenger (including cars) cars, motorcycles and other vehicles.

State of the art

It is well known that the reliability of operation of wheeled vehicles significantly depends on the reliability of metal disks. Accordingly, protecting consumers from counterfeit (counterfeit) and illegal traffic is an important practical task.

To solve this problem, reliable protective labeling of disks with identification information is required, which is available for remote reading at all stages of the disk's life cycle from manufacture to decommissioning.

Such well-known marking tools as glued labels or easily removable hinged tags that are suitable as “witnesses” of authenticity only until the moment the discs enter the sales force or to auto repair shops, where they can be easily replaced with fakes, clearly do not meet these requirements.

Marking with clamping seals that are mechanically attached to the rims and on the external surfaces of which are marked (usually encoded) with identifiers is more stable. Such seals are difficult to replace, and their absence in itself may indicate illegal manipulations with controlled disks.

Marking records formed directly on disks by laser engraving or mechanical impact marking are even more stable. However, the distortion of such records by erasing or interrupting virtually eliminates the reliable identification and identification of fake disks.

Moreover, all the above-mentioned marking tools are designed for visual perception, and therefore usually have limited information capacity and exclude reading records when there is a lack of light, pollution, and even more so when the wheels rotate.

These shortcomings are deprived of such means of protective marking of piece products as radio-frequency tags, each of which has an RFID chip and an antenna electrically connected to it. With their help, a contactless automated identification method is implemented, based on writing data about controlled objects to the memory of RFID chips and reading records through a radio channel in the UHF band (usually, but not necessarily, at frequencies of 860-960 MHz). Radio frequency tags, along with the function of identification information carriers, serve as transceivers of radio signals.

The use of radio frequency tags requires reliable mounting on controlled objects. For example, they can be reliably mechanically fixed on non-metallic objects and in tires of pneumatic wheels.

For the marking of wood, plastics, as well as semi-finished products and products thereof, radio frequency tags are usually placed in at least partially radiolucent cases with wedge or screw fasteners (EP 2816508; CN 101737389; US 6239737; WO 2010 052375 and others).

To mark tires, RFID tags are placed in completely radiolucent casings, which are embedded in crude rubber and fixed by subsequent vulcanization (US 2012305151; WO 2013/147479; US 2015/083811; WO 2016/053933 and others).

And although the attachment of RF tags to these objects is associated with violations of their integrity, they will be all the less significant, the larger the size of these objects.

However, a violation of the integrity (and, accordingly, the deliberate formation of stress concentrators) is undesirable even for large-sized wheel disks of trucks and tractors.

Such violations can be eliminated by using mounted electronic radiofrequency seals (hereinafter - EPF), which are widespread as a means of automated remote metering of various products and preventing their theft or counterfeiting during transportation, in retail trade, at repair facilities and during operation. They usually (but not necessarily) operate at frequencies of 125 kHz, 13.56 MHz, 315/433 MHz and 865 MHz.

Reviews of typical EHP designs are easy to find on the Internet (see, for example, the link: https://studref.com/321456/informatika/elektronnye_radiochastotnye_plomby).

According to the signaling ability, they distinguish:

active EPCs that have programmable RFID chips and internal power supplies and therefore can independently signal the status and movements of protected objects in a follow-up mode,

semi-active EPGs, which also have internal power sources, but signal the status and / or location of protected objects by external commands, and

passive EDS, whose RFID-chips are used to write and read identification information only by external commands from external energy sources.

Active and, to a lesser extent, semi-active EPGs are expensive products. Their use is economically justified only for protection against theft of significantly more expensive controlled objects. For example, EP 3064678 discloses the use of an active EPG in a container breaking prevention device that provides remote monitoring in a follow-up mode via satellite communication systems.

Passive EPGs are much cheaper and therefore can be used for piece marking and protection against counterfeiting or theft of consumer goods. Such EPGs have, at a minimum, a radio-transparent enclosure, a radio-frequency tag (i.e., an RFID chip and an antenna) placed in it, and a housing lock on the protected object.

The closest analogue of the EPG proposed further is disclosed in US 7202788. A known electronic RFID seal contains:

radiolucent case (in the original - “head”) with a through hole;

a radio frequency tag located in the housing, including an RFID chip and an antenna (usually in the form of an electrically conductive coil covering the walls of the through hole);

the housing lock on the protected object in the form of a strip of flexible highly elastic polymer, one end of which is rigidly connected to the housing, and the second end is pinched in the said through hole in the working position; and

a signal line between the RFID chip and the antenna built-in (embedded or pasted) into this flexible elastic strip (in particular, in the form of a loop of thin copper wire, which essentially serves as one of the turns of the antenna).

In the known design, the ERG is clamped with a ratchet lock, including several ratchet teeth on the specified strip and a fixed ratchet dog, the role of which is played by one of the ribs at the junction of the walls of the housing and the through hole.

Such EPs are convenient for staging and therefore have found wide application.

However, the elasticity of the ratchet teeth allows for the separation of the EPG from the protected objects and their reuse on illegally produced (falsified) products. In this case, the signal line connected between the RFID chip and the antenna is usually broken, because copper is much less elastic than flexible polymers. As a result, the identification information recorded in the memory of the RFID chip becomes inaccessible for reading. This makes it difficult to investigate traffic accidents related to disk damage, because it does not allow obtaining reliable data about the replaced disks and narrowing down the search for places and perpetrators of the substitution.

Utility Model Essence

The utility model is based on the task of improving the structure to create an EGF that is capable of recording the fact of a break in the signal transmission line while maintaining the availability of the identification record for reading.

This problem is solved in that in an electronic radiofrequency seal containing a radiolucent casing with a through hole, an RFID tag including an RFID chip and an antenna electrically connected to it is placed in the casing,

the seal retainer on the protected object in the form of a flexible elastic strip, one end of which is rigidly connected to the body, and the second end is clamped in the said through hole in the working position, and the signal transmission line built into the specified strip, according to the inventive concept, the signal transmission line is connected to RFID- the chip through the trigger latch, and the antenna is connected to the RFID chip, regardless of the signal line.

Latch triggers are widely known (http://digteh.ru/CVT/trigg/). They are able to once change the initial information state to the opposite (for example, unity to zero, or vice versa) when exposed to a signal input. The proposed electrical circuitry for an electronic RFID seal gives such a trigger the function of an integrity indicator, which makes it possible to detect illegal (repeated) use of the seal and at the same time maintain the availability of the identification record for reading.

An additional difference is that the antenna is made in the form of a dipole. This allows you to increase the reading range of the label and simplify the indication of violation of integrity.

Brief Description of the Drawing

Further, the essence of the utility model is illustrated by a detailed description of its design and method of application with reference to the drawings, which depict on:

FIG. 1 - electronic radiofrequency seal for rims (longitudinal section);

FIG. 2 - ERP for rims assembled (axonometric projection);

FIG. 3-example of the suspension of the EPG on the rim.

Best Utility Model Embodiments

An electronic radiofrequency seal for rims has (see Fig. 1):

a radiotransparent housing 1, which is made of an elastic insulating polymer such as high-strength polyethylene or polypropylene and has a through hole 2;

a radio-frequency tag located in the housing 1, including an RFID chip 3 and an antenna 4 electrically connected to it,

the seal seal on the rim in the form of a flexible elastic strip 5, one end of which is rigidly connected to the housing 1 (in particular, is pressed into it or is a continuation thereof), and the second end is pinched in the through hole 2 in the working position, and

a signal transmission line 6 built into the strip 5, which is connected to the RFID chip 3 through the trigger latch 7.

As can be seen in the drawings, the antenna 4 is connected to the RFID chip 3 regardless of the signal transmission line 6. Preferably, the antenna 4 has the form of a dipole.

The trigger latch 7 can be part of modern RFID chips, for example, such as "UCode G2iL +" or "G2iM +", which are commercially available from NXP Semiconductors (Netherlands). The function of these microchips, which implements the operation of the trigger-latch, is called the “tamper-proof” function in foreign literature.

The dimensions of the housing 1 of the EPG are determined by the overall dimensions of the antenna 4 and can be 40 ... 50 mm in length and 17 ... 25 mm in width. The length of the strip 5 with an integrated signal transmission line 6 is selected according to the size of the wheels to be marked.

To pinch the seal on the rim strip 5 can be equipped with several ratchet teeth, as described above. However, it is preferable that this strip 5 has a rough surface, and in the through hole 2 of the housing 1, at least one of the inner walls has an elastic protrusion 8, as shown in FIG. 1. In the working position (see Fig. 2), the protrusion 8 will serve as a brake, which makes it difficult to remove the strip 5 from the hole 2 and provides a break in the signal transmission line 6 in case of removal of the seal.

The described ERP works as follows.

The sealed disk is covered with a strip 5, its end part is threaded into the hole 2 of the housing 1 and tightened to the stop, as shown in FIG. 3. In this form, sealed rims are transmitted to the distribution network.

At the stage of operation of the disk after the final mounting of the wheel, the seal is inside the cavity of the tubeless tire (or clamped between the surface of the disk and the tire chamber) and is stored in this form until the end of the disk operation.

The identification information and the data on the initial state of the trigger-latch 7 are recorded on the RFID chip 3 through a radio channel, operating, as a rule, in the frequency range 860-960 MHz, either before installation or immediately after installing the seal on the disk. Some of this information (the name of the disc manufacturer, batch number, disc number in the batch, release date, manufacturer’s trademark and / or service mark of the authorized controller) can be duplicated (preferably in a bar code or in some other encoded form) on case 1.

During the control, identification information is read through the radio channel, the actual state of the trigger-latch 7 is determined, and it is compared with the initial state.

If the integrity of the seal has not been violated, then when reading the actual and initial state of the trigger-latch 7 coincide, and the disk is allowed for sale or installation.

If the integrity of the seal was broken with a break in the signal transmission line 6, then the value of the trigger-latch bit 7 at the beginning of the survey irreversibly changes from “1” to “0” (or vice versa) and cannot be returned to its original state even when line 6 is restored. At the same time, the RFID tag remains operational and, when read, the RFID chip 3 transmits an alarm (tagtamperalarm) through antenna 4.

Reading identification information is possible both individually from each individual EPG, and simultaneously from several such seals.

Industrial applicability

The proposed electronic radiofrequency seal can be mass produced from available materials and components and is widely used for marking the wheels of pneumatic wheels of vehicles.

Claims (2)

1. An electronic radiofrequency seal containing a radiolucent case with a through hole, an RFID tag placed in the case, including an RFID chip and an antenna electrically connected to it, a seal lock on the protected object in the form of a flexible elastic strip, one end of which is rigidly connected to the case, and the second end in the working position is pinched in the aforementioned through hole, and a signal transmission line integrated in said strip, characterized in that the signal transmission line is connected to the RFID chip via a trigger latch, and the antenna Knit with RFID-chip regardless of the signal transmission line. 2. The electronic radiofrequency seal according to claim 1, characterized in that the antenna is made in the form of a dipole.

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