WO2017178668A1 - Etiqueta, sistema y método para la detección de objetos a larga distancia - Google Patents
Etiqueta, sistema y método para la detección de objetos a larga distancia Download PDFInfo
- Publication number
- WO2017178668A1 WO2017178668A1 PCT/ES2017/000035 ES2017000035W WO2017178668A1 WO 2017178668 A1 WO2017178668 A1 WO 2017178668A1 ES 2017000035 W ES2017000035 W ES 2017000035W WO 2017178668 A1 WO2017178668 A1 WO 2017178668A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frequency
- field
- label
- magnetic
- low frequency
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06187—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking
- G06K19/06196—Constructional details
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06187—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
- G08B13/2468—Antenna in system and the related signal processing
- G08B13/2471—Antenna signal processing by receiver or emitter
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
- G08B13/2411—Tag deactivation
Definitions
- the present invention falls within the field of object detection through electromagnetic fields. More specifically, the invention relates to a wireless long-distance detectable tag formed by an active element and a complementary element, both magnetic, as well as the ssslema and method of object detection using said tag.
- the present invention relates to a system for the electronic detection of objects at a long distance based on the influence of magnetic phenomena on the reflectivity of GHz waves including, in particular, the active / deactivating labels and the system and method of detecting the same.
- Patent FR763881 shows the first device of this t ⁇ po.
- the described device is based on the use of a soft magnetic tape of the type of! Permaiioy that subjected to an alternating magnetic field induces harmonics in a detector clearly different from those from other types of metals.
- amorphous magnetic materials in the form of tape have low coercive fields and high susceptibility that can be optimized to be used in equipment for the electronic detection of articles by means of suitable heat treatments in the presence or not of the magnetic field.
- WO0213210 refers to the use of compositions based on CoNiFeSiBC.
- US4680025 a detector system is shown in which a magnetic wire biestabie of minimum length 7.6 cm is used as a label. In this case an alternating magnetic field is applied to a certain region of the space and an alarm is activated if a disturbance of said magnetic field is detected. This occurs when the label is introduced in that region and the value of the magnetic field exceeds the critical field of the wire causing the magnetization to be reversed. This is known Like snap action. A drawback of these systems is the high length of the label.
- US46S6516 shows a way of doing it from the crystallization of amorphous magnetic material. This is done by heating, at least a part of the label, above its crystallization temperature either by applying an electric current or a radiant energy like a laser. Although some of the procedures presented here allow you to deactivate the label without touching it, they need to be carefully applied.
- the US498G870 patent shows a magnetic marker for electronic monitoring of articles where the tag has "snap action" for low values of old ttires of the applied magnetic field and also the tag is easily deactivatable.
- US5313192 develops a label equivalent to that described in US4980870 but is more stable and controllable.
- the processing conditions of the amorphous magnetic tape are the same but, in addition, the label is subjected to predetermined magnetic fields during processing that allow it to be activated and deactivated.
- the label of this invention contains a soft magnetic material that constitutes the main core and a second hard or semi-hard magnetic material. This label is conditioned in such a way that the second material has states activated and deactivated respectively. In the activated state, the label exhibits bistable hysteresis while the deactivated label exhibits a hysteresis cycle without Brakhausen hops.
- US6747559 refers to a permanent label for electronic detection of articles based on magnetic micro-wires with low coercive field (less than 10 A m) and high magnetic permeability (greater than 20,000).
- the length of the microhüo or microwires used is not more than 32 mm. In this case, it is the high permeability that allows obtaining high order harmonics and with great amplitude for sufficiently low applied field values, thus making the label easy to distinguish
- Patent US7852215 presents a label based on magnetic microphones to operate according to the induction method in an equivalent manner to that described in US6747559.
- Patent US8232879 bases remote sensing of objects on a tag formed by at least two elements in a given relative position which limits the size and geometry of the tag.
- the present patent presents the possibility of a magnetic micro wire as an elementary sensor of small length detectable at high distances (greater than 1 meter) whose detectability is conditioned by the relationship between its coercive field and the frequency.
- the invention relates to a label formed by an active element and, optionally, a complementary element, both magnetic, which allows its Wireless long-distance detection by modulating the refiectivity of the active element.
- the active element is a soft magnetic wire with a diameter between 80 and 200 microns, with giant magnetoimpedance and length conditioned by the emission frequency of the antennas so that, for excitation frequencies between 1 and 20 GHz, the length of the element to detect is between 30 and 1 cm; more precisely, for a frequency of 3 GHz a 5 cm sensor element would be used and for 1.5 GHz, 10 crn.
- the coercive field shown by the micro thread depends on the frequency of this low frequency field.
- Said magnetic mircohilo must have a non-bistable hysteresis cycle with transverse anisotropy between 10 and 20 Oe and its coercive field, between 1 and 5 Oe, for frequencies of a low frequency exciter field between 10 and 50,000 mHz, never exceeding.
- the micro-wire can be both an elongated and closed micro thread, for example, in the form of a ring, square or rectangle, with one or more turns or in the form of micro-wire powder.
- Its composition can be amorphous or nanocrystalline with a coercive field between 0.5 and 250 Oe (for frequencies of the low frequency exciter field of 0.001 and 50 Hz, never higher) with property of 0 giant magnetoimpedance, with proper thread geometry,
- the dimensions of the thread are between 30 and 1 crrt, the diameter of the anilium between 0.5 and 10 cm, the side of the rectangle between 0.5 and 10 cm or the length of the micro-threads of powder between 1 and 5 mm.
- the magnetic permeability due to the low magnetic anisotropy of the microhiio. It is easily modified by applying a magnetic field.
- the coercive field of the wire of the active element increases when the frequency of the low frequency field increases and the maximum variation in the reflectivity of the active element occurs for low frequency fields associated with coercive fields of the active element between 1 and 20 Hz.
- the coercive field of the active element is controlled through the composition of the yarn and thermal nanocrystallization treatments.
- the magnetic impedance effect between 20 and 50% is controllable through the percentage of nanocrystallization between 0 and 10%.
- the second element can be a magnetic wire with a diameter greater than 100 microns or a magnetic tape or a magnetic powder, whose remanence is such that, in the vicinity of the soft magnetic micro thread, it creates a magnetic field of the order of its field coercive to the frequency of the exciter field
- This second magnetic element with magnetization ta! that generates a magnetic field in the vicinity of! Micro thread equivalent to its coercive field maximizes the reflectivity of the thread.
- this second element can also be used as a label deactivator because, once used, its magnetization state could be modified by applying an intense magnetic field and leaving the label deactivated.
- the detection system consists of a transmitter system connected to a transmitter antenna and a ⁇ receiver system connected to a receiver antenna.
- the emitting antenna emits a fixed frequency wave between 0.5 and 8 GHz.
- a wave polarizer in one direction or rotary is used to ensure that the electric field of the wave is in the axial direction of the element to be detected and a system Low frequency signal generator, between 10 and 50,000 mH ⁇ (never higher), connected to coils for the creation of a magnetic field of alternating low frequency modulation a! which optionally overlaps a continuous field in the detection zone. All this is controlled by a controller system connected to the transmitter device, the receiver and the low frequency serial generator.
- the receiver system collects the variations in the reflectivity of the element to be detected, modulated by the superposition of the continuous magnetic fields and Straw frequency, respectively.
- the detection system comprises a first electrical circuit fed by a low frequency sinusoidal signal to which another continuous electric current (DC) can be superimposed that feeds a winding, camouflage on the ground, which generates a magnetic field lower than the field of Anisotropy of the micro thread used. Said circuit allows the magnetization and periodic demagnetization of the soft magnetic glass placed on the label.
- the system comprises a second circuit that is used to emit and receive, by means of both sender and receiver antennas, a signal of such frequency so that the frequency coincides with the frequency of electrical resonance of the chosen thread.
- the system comprises means for processing the serial by setting a detection threshold.
- a third aspect of the invention relates to the method of detecting long-distance objects using the label described.
- the electromagnetic wave dispersion coefficients due to the magnetic susceptibility, are simultaneously modified by: the frequency of the alternating magnetic field generated by the electrical circuit (that is, the first circuit of the detection system) and involves the periodic magnetization of the microhyde. with a frequency between 0.01 and 50 Hz, the Optimum frequencies for Sa detection always being lower than a certain value that is conditioned by the microstructure of! thread. In the case of amorphous microstructure, the optimal frequencies would be less than 10 Hz and in the case of crystalline microstructure, 20 Hz.
- the amplitude of the alternating magnetic field generated by e! electrical circuit that is, the first circuit of the detection system
- the detection of the tag is performed by modulating the reflectance of its active energetics (the microhyde) with respect to the electromagnetic waves of frequency between 1 and 20 GHz used, for it. a low frequency magnetic field that can be between .01 and 50 Hz.
- the amplitude of! field is between 0 and 25 Oe.
- the modulation of the microlectivity of the microhyde is done with frequency of this low frequency field and is a consequence of the giant magnetoimpedance effect experienced by the active element.
- the maximum variation in the collectivity of the active element occurs for its frequencies of electrical resonance conditioned by the geometry (length in the case of a wire, diameter in the case of ring and side lengths in the case of square or rectangle ).
- This modulation of the selectivity of the active element implies the modulation of the GHz wave in the presence of said element and its detection is done by an antenna through the wave modulated in GHz in the presence of a magnetic active element subjected to a low field frequency.
- the generation of the magnetic field is of low frequency can be done, for example, by means of rectangular coils camouflaged on the ground and the generation and GHz wave detection can be performed using a system of eamuflabies antennas on the roof.
- Figure 1 shows schemes corresponding to different label configurations: wire (1) with soft magnetic wire ( ⁇ ) and (1 1 '), ring (2), (2') and (2 "), square (3), (3 ') and (3 ") and microhiium powder (4).
- Figure 2 shows a scheme of the electromagnetic circuit with the following elements: label with wire (5), emitting antenna (6), receiving antenna (7), emitted wave (8), modulated wave (9).
- low frequency field coil (10) function generator (1 1), amplifier (12), ammeter (1 3) and vector analyzer (14).
- Figure 3 shows the hysteresis cycles, obtained by the 10 Hz induction method, associated with two 10 and 1.5 cm microhiios with the required parameters of anisotropy field with values, in this case, of 1 7 Oe (15 ) and 22 Oe (16), respectively, and coefficient field of 1 Oe (1 7).
- Figure 4 shows Sos hysteresis cycles corresponding to a child of 1-5 crn at different frequencies: 10 Hz (18), 20 Hz (19), 30 Hz (20), 40 Hz (21) and 50 Hz (22).
- Figure 5 shows the evolution of the coercive field with the frequency for a 15 cm thread.
- Figure 6 shows the reflectivity as a function of the time detected by the antenna (6) and associated with the modulated wave (9) with the frequency of the low frequency field for a wave frequency emitted by the antenna of 2.37 GHz and a applied low frequency field of 2.5 Oe.
- Figure 7 shows the evolution of the maximum reflectivity as a function of the low frequency field frequency of 2.5 Oe for the 2.37 GHz wave.
- Figure 8 shows the evolution of the maximum reflectivity for frequencies between 10 and 50 Hz when a continuous magnetic field is applied.
- Figure 9 shows the maximum refiectivity as a function of time for two microhoules, one soft and the other hard: with the thread deproved (a) and saturated (b).
- a label consisting of two parallel threads of 15 cm in length and FeCoSiB composition is selected having one of the threads amorphous structure and another crystal structure thread. Their hysteresis cycles are performed at different frequencies to determine their coercive field according to the frequency ( Figure 3).
- the detection of the micro thread is made from the amplitude of the detected signal and its variation with respect to that observed in the absence thereof.
- the amplitude of the signal is greater the lower the frequency of the low frequency field. In the presence of a magnetically hard wire it is possible to decrease the voltage of this signal which would result in the deactivation of the tag.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Geophysics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Burglar Alarm Systems (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measuring Magnetic Variables (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/093,461 US11023795B2 (en) | 2016-04-13 | 2017-03-27 | Tag system and method for long-distance detection of objects |
EP17781967.9A EP3444743B1 (en) | 2016-04-13 | 2017-03-27 | Label, system and method for long-distance detection of objects |
CN201780023833.1A CN109074468B (zh) | 2016-04-13 | 2017-03-27 | 远距离检测物体的标签、系统和方法 |
JP2018553869A JP7090552B2 (ja) | 2016-04-13 | 2017-03-27 | 物体の長距離検出のためのタグ、システム、および方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201600298A ES2581127B2 (es) | 2016-04-13 | 2016-04-13 | Etiqueta, sistema y método para la detección de objetos a larga distancia |
ESP201600298 | 2016-04-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017178668A1 true WO2017178668A1 (es) | 2017-10-19 |
Family
ID=56789952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2017/000035 WO2017178668A1 (es) | 2016-04-13 | 2017-03-27 | Etiqueta, sistema y método para la detección de objetos a larga distancia |
Country Status (7)
Country | Link |
---|---|
US (1) | US11023795B2 (es) |
EP (1) | EP3444743B1 (es) |
JP (1) | JP7090552B2 (es) |
CN (1) | CN109074468B (es) |
ES (1) | ES2581127B2 (es) |
MA (1) | MA44675A (es) |
WO (1) | WO2017178668A1 (es) |
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US10762413B2 (en) * | 2012-08-30 | 2020-09-01 | Féinics Amatech Teoranta | Booster antenna configurations and methods |
DE102012218657A1 (de) * | 2012-10-12 | 2014-05-22 | Vacuumschmelze Gmbh & Co. Kg | Magnetkern, Verfahren und Vorrichtung zu dessen Herstellung und Verwendung eines solchen Magnetkerns |
CN104109822B (zh) * | 2014-06-05 | 2017-01-04 | 同济大学 | 一种含Ni钴基非晶巨磁阻抗合金薄带及其制备方法 |
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CN104616050B (zh) * | 2015-02-09 | 2017-10-24 | 哈尔滨工业大学深圳研究生院 | 金属标签及检测系统 |
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2016
- 2016-04-13 ES ES201600298A patent/ES2581127B2/es active Active
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2017
- 2017-03-27 JP JP2018553869A patent/JP7090552B2/ja active Active
- 2017-03-27 CN CN201780023833.1A patent/CN109074468B/zh active Active
- 2017-03-27 US US16/093,461 patent/US11023795B2/en active Active
- 2017-03-27 EP EP17781967.9A patent/EP3444743B1/en active Active
- 2017-03-27 WO PCT/ES2017/000035 patent/WO2017178668A1/es active Application Filing
- 2017-03-27 MA MA044675A patent/MA44675A/fr unknown
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Also Published As
Publication number | Publication date |
---|---|
EP3444743B1 (en) | 2024-06-12 |
JP7090552B2 (ja) | 2022-06-24 |
MA44675A (fr) | 2021-05-26 |
EP3444743A4 (en) | 2020-01-22 |
ES2581127B2 (es) | 2017-05-04 |
US20200265280A1 (en) | 2020-08-20 |
US11023795B2 (en) | 2021-06-01 |
CN109074468B (zh) | 2021-11-16 |
ES2581127A1 (es) | 2016-08-31 |
CN109074468A (zh) | 2018-12-21 |
EP3444743A1 (en) | 2019-02-20 |
JP2019514130A (ja) | 2019-05-30 |
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