EP3178075B1 - Systeme und verfahren zur adaptiven steuerung eines senderfeldes - Google Patents

Systeme und verfahren zur adaptiven steuerung eines senderfeldes Download PDF

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Publication number
EP3178075B1
EP3178075B1 EP15745119.6A EP15745119A EP3178075B1 EP 3178075 B1 EP3178075 B1 EP 3178075B1 EP 15745119 A EP15745119 A EP 15745119A EP 3178075 B1 EP3178075 B1 EP 3178075B1
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EP
European Patent Office
Prior art keywords
pedestal
field
person
distance
antenna
Prior art date
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EP15745119.6A
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English (en)
French (fr)
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EP3178075A1 (de
Inventor
Adam Scott BERGMAN
Manuel A. Soto
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Sensormatic Electronics LLC
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Sensormatic Electronics LLC
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Priority claimed from US14/466,046 external-priority patent/US9311796B2/en
Application filed by Sensormatic Electronics LLC filed Critical Sensormatic Electronics LLC
Priority to EP20212263.6A priority Critical patent/EP3809383B1/de
Publication of EP3178075A1 publication Critical patent/EP3178075A1/de
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    • 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
    • G08B13/248—EAS system combined with another detection technology, e.g. dual EAS and video or other presence detection system
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1645—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means and other detection means, e.g. microwave or infrared radiation

Definitions

  • the present invention relates generally to Electronic Article Surveillance ("EAS") detection systems. More particularly, the present invention relates to systems and implementing methods for adaptively controlling a transmitter of an EAS detection system.
  • EAS Electronic Article Surveillance
  • EAS detection systems generally comprise an interrogation antenna for transmitting an electromagnetic signal into an interrogation zone, markers which respond in some known electromagnetic manner to the interrogation signal, an antenna for detecting the response of the marker, a signal analyzer for evaluating the signals produced by the detection antenna, and an alarm which indicates the presence of a marker in the interrogation zone.
  • the alarm can then be the basis for initiating one or more appropriate responses depending upon the nature of the facility.
  • the interrogation zone is in the vicinity of an exit from a facility such as a retail store, and the markers can be attached to articles such as items of merchandise or inventory.
  • AM AcoustoMagnetic
  • U.S. Patent Nos. 4,510,489 and 4,510,490 The detection of markers in an AM EAS detection system by pedestals placed at an exit has always been specifically focused on detecting markers only within the spacing of the pedestals.
  • the interrogation field generated by the pedestals may extend beyond the intended detection zone.
  • a first pedestal will generally include a main antenna field directed toward a detection zone located between the first pedestal and a second pedestal. When an exciter signal is applied at the first pedestal it will generate an electro-magnetic field of sufficient intensity so as to excite markers within the detection zone.
  • the second pedestal will generally include an antenna having a main antenna field directed toward the detection zone (and toward the first pedestal).
  • An exciter signal applied at the second pedestal will also generate an electromagnetic field with sufficient intensity so as to excite markers within the detection zone.
  • a marker tag When a marker tag is excited in the detection zone, it will generate an electromagnetic signal which can usually be detected by receiving the signal at the antennas associated with the first and second pedestal.
  • the document WO01/15103 discloses adapting the power of EAS interrogation coils in function of the distance between the gate and objects such as persons or shopping carts.
  • the present invention concerns implementing systems and methods for adaptively controlling a transmitter field in an EAS detection system.
  • the methods comprise: detecting, by at least one first proximity sensor, a presence of a first person located in proximity to a pedestal of the EAS detection system; determining a first distance from the first proximity sensor to the first person; and using the first distance to adaptively control the transmitter field of the EAS detection system.
  • the transmitter field is controlled by adjusting a transmit power of the first pedestal.
  • the transmit power of the first pedestal is returned to its previous level when the first person moves out of an antenna field pattern.
  • the methods may also involve determining if the first person is located in a back-field of a radiation pattern of an antenna of the first pedestal.
  • the first distance may only be used for said adaptive control if it is determined that the first person is not located in the back-field of the radiation pattern of the antenna of the first pedestal.
  • the first distance may only be used for said adaptive control if it is determined that the first person is located in the back-field of the radiation pattern of the antenna of the first pedestal and if distance information associated with a person located in the back-field should be used to control transmit power of a pedestal.
  • the methods may further involve: determining a second distance from a second proximity sensor to the first person; and determining if the first and second distances are the same. Either the first distance or second distance is selected for controlling transmit power if a determination is made that the first and second distances are the same. Alternatively, a smallest distance is selected from the first and second distances if a determination is made that the first and second distance are not the same. In this case, the smallest distance is used to control transmit power.
  • the methods may also involve: detecting a presence of a second person located in proximity to a pedestal of the EAS detection system while the first person is located in proximity to the pedestal; determining a second distance from the pedestal to the second person; and determining if the first and second distances are the same. Either the first distance or the second distance is selected for controlling transmit power if a determination is made that the first and second distances are the same. Alternatively, a smallest distance is selected from the first and second distances if a determination is made that the first and second distance are not the same.
  • the smallest distance is used to control transmit power: (A) if it is determined that the person associated with the smallest distance is not located in the back-field of the radiation pattern of the antenna of the first pedestal, or (B) if it is determined that the person associated with the smallest distance is located in the back-field of the radiation pattern of the antenna of the first pedestal and if distance information associated with a person located in the back-field should be used to control transmit power of a pedestal.
  • the present invention generally provides systems and implementing methods for adjusting EAS detection system power based on proximity information.
  • sensors e.g., ultrasonic transducers
  • These sensors facilitate detection of persons located in proximity to the pedestals.
  • the transmitter power of the EAS detection system is attenuated such that the levels are optimized for system performance.
  • the EAS detection system experiences power savings, a reduction in back-field detection, and an improved detection consistency as compared to that of conventional EAS detection systems.
  • an exemplary architecture for an EAS detection system 100 is provided.
  • the present invention is described herein in terms of an AM EAS detection system.
  • the method of the invention can also be used in other types of EAS detection systems, including systems that use Radio Frequency (“RF”) type tags and Radio Frequency IDentification (“RFID”) EAS detection systems.
  • RF Radio Frequency
  • RFID Radio Frequency IDentification
  • the EAS detection system 100 will be positioned at a location adjacent to an entry/exit 104 of a secured facility (e.g., a retail store).
  • the EAS detection system 100 uses specially designed EAS marker tags ("security tags") which are applied to store merchandise or other items which are stored within a secured facility.
  • the security tags can be deactivated or removed by authorized personnel at the secure facility. For example, in a retail environment, the security tags could be removed by store employees.
  • an active security tag 112 is detected by the EAS detection system 100 in an idealized representation of an EAS detection zone 108 near the entry/exit, the EAS detection system will detect the presence of such security tag and will sound an alarm or generate some other suitable EAS response. Accordingly, the EAS detection system 100 is arranged for detecting and preventing the unauthorized removal of articles or products from controlled areas.
  • the EAS detection system 100 includes a pair of pedestals 102a, 102b, which are located a known distance apart (e.g., at opposing sides of entry/exit 104).
  • the pedestals 102a, 102b are typically stabilized and supported by a base 106a, 106b.
  • the pedestals 102a, 102b will each generally include one or more antennas that are suitable for aiding in the detection of the special EAS security tags, as described herein.
  • pedestal 102a can include at least one antenna 302 suitable for transmitting or producing an electromagnetic exciter signal field and receiving response signals generated by security tags in the detection zone 108.
  • the same antenna can be used for both receive and transmit functions.
  • pedestal 102b can include at least one antenna 402 suitable for transmitting or producing an electromagnetic exciter signal field and receiving response signals generated by security tags in the detection zone 108.
  • the antennas provided in pedestals 102a, 102b can be conventional conductive wire coil or loop designs as are commonly used in AM type EAS pedestals. These antennas will sometimes be referred to herein as exciter coils.
  • a single antenna can be used in each pedestal. The single antenna is selectively coupled to the EAS receiver. The EAS transmitter is operated in a time multiplexed manner.
  • the antennas located in the pedestals 102a, 102b are electrically coupled to a system controller 110.
  • the system controller 110 controls the operation of the EAS detection system 100 to perform EAS functions as described herein.
  • the system controller 110 can be located within a base 106a, 106b of one of the pedestals 102a, 102b or can be located within a separate chassis at a location nearby to the pedestals.
  • the system controller 110 can be located in a ceiling just above or adjacent to the pedestals 102a, 102b.
  • the EAS detection system comprises an AM type EAS detection system.
  • each antenna is used to generate an Electro-Magnetic ("EM") field which serves as a security tag exciter signal.
  • EM Electro-Magnetic
  • the security tag exciter signal causes a mechanical oscillation of a strip (e.g., a strip formed of a magnetostrictive or ferromagnetic amorphous metal) contained in a security tag within a detection zone 108.
  • a strip e.g., a strip formed of a magnetostrictive or ferromagnetic amorphous metal
  • the vibration of the strip causes variations in its magnetic field, which can induce an AC signal in the receiver antenna.
  • This induced signal is used to indicate a presence of the strip within the detection zone 108.
  • the same antenna contained in a pedestal 102a, 102b can serve as both the transmit antenna and the receive antenna. Accordingly, the antennas in each of the pedestals 102a, 102b can be used in several different modes to detect a security tag exciter signal. These modes will be described below in further detail.
  • an antenna radiation pattern is a graphical representation of the radiating (or receiving) properties for a given antenna as a function of space.
  • the properties of an antenna are the same in a transmit mode and a receive mode of operation.
  • the antenna radiation pattern shown is applicable for both transmit and receive operations as described herein.
  • the exemplary antenna field patterns 300, 400 shown in FIGS. 3-4 are azimuth plane pattern representing the antenna pattern in the x, y coordinate plane.
  • the azimuth pattern is represented in polar coordinate form and is sufficient for understanding the inventive arrangements.
  • the azimuth antenna field patterns shown in FIGS. 3-4 are a useful way of visualizing the direction in which the antennas 302, 402 will transmit and receive signals at a particular transmitter power level.
  • each pedestal 102a, 102b is positioned so that the main lobe of an antenna contained therein is directed into the detection zone 108. Accordingly, a pair of pedestals 102a, 102b in the EAS detection system 100 will produce overlap in the antenna field patterns 300, 400, as shown in FIG.
  • the antenna field patterns 300, 400 shown in FIG. 5 are scaled for purposes of understanding the present invention.
  • the patterns show the outer boundary or limits of an area in which an exciter signal of particular amplitude applied to antennas 302, 402 will produce a detectable response in an EAS security tag.
  • a security tag within the bounds of at least one antenna field pattern 300, 400 will generate a detectable response when stimulated by an exciter signal.
  • the overlapping antenna field patterns 300, 400 in FIG. 5 will include an area A where there is overlap of main lobes 304, 404. However, it can be observed in FIG. 5 that there can also be some overlap of a main lobe of each pedestal with a back-field lobe associated with the other pedestal. For example, it can be observed that the main lobe 404 overlaps with the back-field lobe 306 within an area B. Similarly, the main lobe 304 overlaps with the back-field lobe 306 in an area C. Area A between pedestals 102a, 102b defines the detection zone 108 in which active security tags should cause the EAS detection system 100 to generate an alarm response.
  • Security tags in area A are stimulated by energy associated with an exciter signal within the main lobes 304, 404 and will produce a response which can be detected at each antenna.
  • the response produced by a security tag in area A is detected within the main lobes of each antenna and processed in the system controller 110.
  • a security tag in areas B or C will also be excited by the antennas 302, 402.
  • the response signal produced by a security tag in these areas B and C will also be received at one or both antennas. This response signal is referred to herein as a "security tag signal".
  • each proximity sensor 108a, 108b is advantageously mounted on each pedestal 102a or 102b.
  • Proximity sensors and ultrasonic transducers are well known in the art, and therefore will not be described herein. Still, it should be understood that each proximity sensor 108a, 108b is generally configured to detect the presence of a person and/or object located on a given side of a respective pedestal, as well as his/her/its distance from the same.
  • the proximity sensors 108a, 108b are arranged to point in both a front-field and a back-field of each respective pedestal 102a, 102b.
  • a first one of the proximity sensors points in a first direction shown by arrow 110, and thus detects persons located in the back-field of the respective pedestal.
  • a second proximity sensor points in a second opposite direction shown by arrow 112, and therefore detects persons located in the front-field of the respective pedestal.
  • each proximity sensor generates high frequency sound waves; transmits the high frequency sound waves in a given direction; and receives echo signals from persons and/or objects located in range of the transmitted high frequency sound waves.
  • the system controller 110 determines a time interval between a first time at which a respective high frequency sound wave was transmitted from the proximity sensor and a second time at which the echo signal was received by the proximity sensor. The time interval is then used by the system controller 110 to determine the distance from a respective pedestal to the person/object based on the previously determined time interval. The determined distance is then used to control the EAS transmitter power separately and/or independently for each pedestal. The EAS transmitter power is returned to its original level after the person moves a certain distance from the pedestal (e.g., a sufficient distance so as to no longer reside in the interrogation zone).
  • the size of its antenna field pattern is dynamically adjusted based on proximity information regarding persons located in proximity to the pedestals. Since the EAS transmitter power for each pedestal is adjusted independently from that of the other pedestal, the antenna field patterns of the two pedestals can be the same or different at any given time. For example, let's assume that a person is located closer to pedestal 102a as compared to pedestal 102b. In this case, the antenna field pattern of pedestal 102a is adjusted to decrease it overall size by an amount greater than the amount by which the antenna field pattern for pedestal 102b is decreased.
  • distance information associated with persons located in the back-field is ignored, i.e., not used to control the EAS transmitter power.
  • only distance information associated with persons located between pedestals 102a, 102b is used for adaptively controlling the antenna field patterns of the two pedestals 102a, 102b. In other scenarios, this is not the case, and distance information associated with persons located in the front and back-fields is used to control the strengths of transmitter fields.
  • the sensors 108a and 108b may generate conflicting information about the distance a particular person is relative to a given pedestals 102a or 102b.
  • proximity sensor 108a generates information indicating that a person is three feet away from pedestal 102a.
  • proximity sensor 108b generates information indicating that a person is two feet away from pedestal 102a.
  • the transmitter power for pedestal 102a is adjusted based on the information generated by proximity sensor 108b instead of the information generated by proximity sensor 108a, i.e., the sensor information indicating the smallest distance from pedestal 102a.
  • the antenna field patterns of pedestals 102a and 102b are selectively reduced so as to obtain the following advantages: (1) power savings; (2) a reduction in back-field detections; and/or (3) an improvement in detection consistency.
  • power savings are achieved simply by reducing transmitter power in certain scenarios (e.g., when a person is located in proximity to a pedestal).
  • the back-field detection reduction is achieved by ignoring security tag signals associated with persons located in the back-field.
  • advantage (3) it should be understood that a security tag signal may not be detected when it is very close to the pedestal since the transmitter field is relatively strong at that location.
  • the relatively strong transmitter field causes the amplitude of the security tag signal to exceed a given threshold value, and therefore is considered by system 100 to not constitute a detected security tag signal.
  • the transmitter field strength close to the transmitter is reduced, whereby the amplitude of the security tag signal is also decreased. In effect, the amplitude of the security tag signal falls below the threshold value. As a result, the security tag signal is properly detected within system 100.
  • Method 600 begins with step 602 and continues with step 604.
  • step 604 the presence of a person located in proximity to a pedestal (e.g., pedestal 102a or 102b of FIG. 1 ) of the EAS detection system is detected.
  • a distance is determined from the pedestal to the person, as shown by step 606.
  • step 610 involves using the determined distance to adaptively control a transmitter field for a transmitter of the pedestal such that the antenna field pattern is decreased in overall size.
  • step 618 involves detecting when the person moves out of the antenna pattern.
  • step 620 is performed in which the pedestal's transmit power level is re-set, i.e., returned to its original value.
  • step 622 is performed where method 600 returns to step 604.
  • step 612 is performed to determine whether or not distance information associated with a person in the back-field should be used to control transmitter power. If the distance information associated with a person in the back-field should not be used to control transmitter power [612:NO], then step 614 is performed in which method 600 returns to step 604. In contrast, if the distance information associated with a person in the back-field should be used to control transmitter power [612:YES], then the determined distance is used to adaptively control the transmitter field for the transmitter of the pedestal such that the antenna field pattern is decreased in overall size, as shown by step 616.
  • step 618 involves detecting when the person moves out of the antenna pattern. In response to such a detection, step 620 is performed in which the pedestal's transmit power level is re-set, i.e., returned to its original value. Subsequently, step 622 is performed where method 600 returns to step 604.
  • Method 700 illustrates an exemplary process when two proximity sensors provide the same or conflicting distance measurements. For example, in a conflicting distance measurement scenario, a first proximity sensor indicates that a person is two feet from the pedestal. A second proximity sensor indicates that the person is three feet from the pedestal. The following process describes how the conflicting distance information can be handled within system 100.
  • step 704 a detection is made by at least two proximity sensors of an EAS detection system. More particularly, each proximity sensor detects the presence of a person located in proximity to a pedestal of the EAS detection system. The distance from each sensor to the detected person is then determined in step 706. Thereafter, a decision step 708 is performed to determine if the two distances are the same.
  • step 712 Upon completing step 710 or 712, a decision is made as to whether or not the person is located in the back-field of the radiation pattern of the pedestal's antenna.
  • step 716 is performed.
  • Step 716 involves using the selected determined distance to adaptively control a transmitter field for a transmitter of the EAS detection system such that the antenna field pattern is decreased in overall size.
  • a detection is made as to when the person moves out of the antenna field pattern.
  • the pedestal's transmit power is increased to its original value, as shown by step 726.
  • step 728 is performed where method 700 returns to step 704.
  • step 718 a decision is made in step 718 as to whether distance information associated with a person located in the back-field should be used to control transmitter power. If such distance information should not be used to control transmitter power [720:NO], then method 700 returns to step 704, as shown by step 720. In contrast, if such distance information should be used to control transmitter power [720:YES], then step 722 is performed where the selected determined distance is used to adaptively control the transmitter field of the pedestal such that the antenna field pattern is decreased in overall size. In a next step 724, a detection is made as to when the person moves out of the antenna field pattern. When such a detection is made, the pedestal's transmit power is increased to its original value, as shown by step 726. Subsequently, step 728 is performed where method 700 returns to step 704.
  • Method 800 illustrates an exemplary process when detections are made indicating that two or more persons are located in proximity to a pedestal. For example, a first proximity sensor detects a first person's presence, while a second proximity sensor detects a second person's presence.
  • the following method 800 describes how system 100 can handle such a situation when the two people reside in the back-field, the two people reside in the front-field, and/or only one person resides in the back-field or front-field.
  • step 804 involves detecting the presence of at least two persons located in proximity to a pedestal (e.g., pedestal 102a or 102b of FIG. 1 ) of an EAS detection system (e.g., system 100 of FIG. 1 ).
  • a distance is determined from the pedestal to each detected person. If the determined distances are the same [808:YES], then either one of the two determined distances is selected in step 810. If the determined distances are not the same [808:NO], then the determined distance with the smallest value of the two determined distances is selected in step 812.
  • method 800 continues with steps 814-828.
  • step 814 a determination is made as to whether or not the person, associated with the selected determined distance, is located in the back-field of the radiation pattern of the pedestal's antenna. If the person is not located in the back-field [814:NO], then the selected determined distance is used to adaptively control a transmitter field for a transmitter of the pedestal such that the antenna field pattern is decreased in overall size. Subsequently, step 824 is performed where a detection is made as to when the person moves out of the antenna field pattern. Upon such detection, the pedestal's transmit power is increased to its original value, as shown by step 826. Thereafter, step 828 is performed where method 800 returns to step 804.
  • step 818 is performed where a decision is made as to whether or not distance information associated with a person located in the back-field should be used to control transmitter power. If such distance information should not be used in the stated manner [818: NO], then step 820 is performed. In step 820, the other determined distance information is selected (i.e., the determined distance information for the other detected person). Thereafter, method 800 returns to step 814, as shown by step 821.
  • step 822 is performed in which the selected determined distance information is used to adaptively control a transmitter field for a transmitter of the pedestal such that the antenna field pattern is decreased in overall size.
  • step 824 a detection is made as to when the person moves out of the antenna field pattern. Upon such detection, the pedestal's transmit power is increased to its original value, as shown by step 826. Thereafter, step 828 is performed where method 800 returns to step 804.
  • the system controller comprises a processor 916 (such as a micro-controller or Central Processing Unit (“CPU")).
  • the system controller also includes a computer readable storage medium, such as memory 918 on which is stored one or more sets of instructions (e.g., software code) configured to implement one or more of the methodologies, procedures or functions described herein.
  • the instructions i.e., computer software
  • the instructions can also include a person detection module 950 to facilitate the detection of persons located in proximity to a pedestal, the determination of the distance from the pedestal to the person, and adaptive control of the transmitter field based on the distance determination.
  • a person detection module 950 to facilitate the detection of persons located in proximity to a pedestal, the determination of the distance from the pedestal to the person, and adaptive control of the transmitter field based on the distance determination.
  • the system also includes at least one EAS transceiver 908, including transmitter circuitry 910 and receiver circuitry 912.
  • the transmitter and receiver circuitry are electrically coupled to antenna 302 and the antenna 402.
  • a suitable multiplexing arrangement can be provided to facilitate both receive and transmit operation using a single antenna (e.g. antenna 302 or 402). Transmit operations can occur concurrently at antennas 302, 402 after which receive operations can occur concurrently at each antenna to listen for marker tags which have been excited. Alternatively, transmit operations can be selectively controlled as described herein so that only one antenna is active at a time for transmitting security tag exciter signals for purposes of executing the various algorithms described herein.
  • the antennas 302, 402 can include an upper and lower antenna similar to those shown and described with respect to FIG. 1 . Input exciter signals applied to the upper and lower antennas can be controlled by transmitter circuitry 910 or processor 916 so that the upper and lower antennas operate in a phase aiding or a phase opposed configuration as required.
  • Additional components of the system controller 110 can include a communication interface 924 configured to facilitate wired and/or wireless communications from the system controller 110 to a remotely located EAS system server.
  • the system controller can also include a real-time clock, which is used for timing purposes, an alarm 926 (e.g. an audible alarm, a visual alarm, or both) which can be activated when an active EAS security tag is detected within the EAS detection zone 108.
  • a power supply 928 provides necessary electrical power to the various components of the system controller 110. The electrical connections from the power supply to the various system components are omitted in FIG. 9 so as to avoid obscuring the invention.
  • system controller architecture illustrated in FIG. 9 represents one possible example of a system architecture that can be used with the present invention.
  • the invention is not limited in this regard and any other suitable architecture can be used in each case without limitation.
  • Dedicated hardware implementations including, but not limited to, application-specific integrated circuits, programmable logic arrays, and other hardware devices can likewise be constructed to implement the methods described herein.
  • the apparatus and systems of various inventive embodiments broadly include a variety of electronic and computer systems. Some embodiments may implement functions in two or more specific interconnected hardware modules or devices with related control and data signals communicated between and through the modules, or as portions of an application-specific integrated circuit.
  • the exemplary system is applicable to software, firmware, and hardware implementations.

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Claims (16)

  1. Verfahren zur adaptiven Steuerung eines Senderfeldes in einem Detektionssystem zur elektronischen Artikelüberwachung ("EAS"), umfassend:
    Erfassen, durch mindestens einen ersten Näherungssensor (108a), wobei der erste Näherungssensor (108a) so angeordnet ist, dass er sowohl in einen vorderen Bereich als auch in einen hinteren Bereich eines ersten Pfostens (102a) des EAS- Detektionssystems (100) zeigt, einer Anwesenheit einer ersten Person, die sich in der Nähe des ersten Pfostens (102a) des EAS- Detektionssystems (100) befindet;
    Bestimmung eines ersten Abstands von dem ersten Näherungssensor (108a) zu der ersten Person;
    und
    Verwendung des ersten Abstands zur adaptiven Steuerung des Senderfeldes des EAS-Detektionssystems (100); gekennzeichnet durch
    Bestimmung eines zweiten Abstands von einem zweiten Näherungssensor (108b), wobei der zweite Näherungssensor (108b) so angeordnet ist, dass er sowohl in einen vorderen Bereich als auch in einen hinteren Bereich eines zweiten Pfostens (102b) des EAS-Detektionssystems (100) auf die erste Person zeigt; und
    Bestimmung, ob der erste und der zweite Abstand gleich sind; oder
    Erkennen der Anwesenheit einer zweiten Person, die sich in der Nähe des zweiten Pfostens (102b) des EAS-Detektionssystems (100) befindet, während sich die erste Person in der Nähe des ersten Pfostens (102a) befindet;
    Bestimmung eines zweiten Abstands von dem zweiten Pfosten (102b) zu der zweiten Person;
    und
    Bestimmung, ob der erste und der zweite Abstand gleich sind.
  2. Verfahren nach Anspruch 1, ferner umfassend die Bestimmung, ob sich die erste Person in einem hinteren Bereich eines Richtdiagramms (300) einer Antenne (302) des ersten Pfostens (102a) befindet.
  3. Verfahren nach Anspruch 2, ferner umfassend die Ausführung des Verwendungsschritts nur wenn erkannt wird, dass sich die erste Person nicht im hinteren Bereich des Richtdiagramms (300) der Antenne (302) des ersten Pfostens (102a) befindet.
  4. Verfahren nach Anspruch 2, ferner umfassend die Ausführung des Verwendungsschrittes, wenn erkannt wird, dass sich die erste Person im hinteren Bereich des Richtdiagramms (300) der Antenne (302) des ersten Pfostens (102a) befindet, und wenn Abstandsinformationen, die einer im hinteren Bereich befindlichen Person zugeordnet sind, verwendet werden sollten, um die Sendeleistung eines Pfostens zu steuern.
  5. Verfahren nach Anspruch 1, ferner umfassend das Zurücksetzen einer Sendeleistung des ersten Pfostens (102a) auf ein vorheriges Niveau, wenn sich die erste Person aus einem Antennenfeldmuster herausbewegt.
  6. Verfahren gemäß der ersten Alternative von Anspruch 1, ferner umfassend:
    Auswählen entweder des ersten oder des zweiten Abstands zur Verwendung bei der Steuerung der Sendeleistung, wenn erkannt wird, dass der erste und der zweite Abstand gleich sind, oder Auswählen eines kleinsten Abstands aus dem ersten und dem zweiten Abstand, wenn erkannt wird, dass der erste und der zweite Abstand nicht gleich sind; und
    unter Verwendung des ersten, zweiten oder kleinsten Abstands, der zuvor zur Steuerung der Sendeleistung gewählt wurde.
  7. Verfahren gemäß der zweiten Alternative von Anspruch 1, ferner umfassend die Auswahl entweder des ersten oder der zweiten Abstands zur Verwendung bei der Steuerung der Sendeleistung, wenn erkannt wird, dass der erste und der zweite Abstand gleich sind.
  8. Verfahren nach Anspruch 7, ferner umfassend:
    Auswählen eines kleinsten Abstands aus dem ersten und zweiten Abstand, wenn erkannt wird, dass der erste und zweite Abstand nicht gleich sind; und
    Verwendung des kleinsten Abstands zur Steuerung der Sendeleistung
    (A) wenn erkannt wird, dass die Person, die mit dem kleinsten Abstand assoziiert ist, sich nicht im hinteren Bereich des Richtdiagramms (300) der Antenne (302) des ersten Pfostens (102a) befindet, oder
    (B) wenn erkannt wird, dass sich die Person, die mit dem kleinsten Abstand assoziiert ist, im hinteren Bereich des Richtdiagramms (300) der Antenne (302) des ersten Pfostens (102a) befindet, und wenn Abstandsinformationen, die mit einer Person assoziiert sind, die sich im hinteren Bereich befindet, verwendet werden sollten, um die Sendeleistung eines Pfostens zu steuern.
  9. Elektronisches Artikelüberwachungs- ("EAS") Detektionssystem (100), umfassend:
    mindestens einem ersten Näherungssensor (108a), der so konfiguriert ist, dass er die Anwesenheit einer ersten Person erfasst, die sich in der Nähe eines ersten Pfostens (102a) des EAS-Detektionssystems (100) befindet, wobei der erste Näherungssensor (108a) so angeordnet ist, dass er sowohl in einen vorderen Bereich als auch in einen hinteren Bereich eines ersten Pfostens (102a) des EAS-Detektionssystems (100) zeigt;
    mindestens einen zweiten Näherungssensor (108b), der so konfiguriert ist, dass er die Anwesenheit einer zweiten Person erfasst, die sich in der Nähe eines zweiten Pfostens (102a) des EAS-Detektionssystems (100) befindet, wobei der zweite Näherungssensor (108b) so angeordnet ist, dass er sowohl in einen vorderen Bereich als auch in einen hinteren Bereich eines zweiten Pfostens (102b) des EAS-Detektionssystems (100) zeigt; und
    eine Systemsteuerung (110), die so konfiguriert ist, dass sie einen ersten Abstand von dem ersten Näherungssensor (108a) zu der ersten Person bestimmt und den ersten Abstand verwendet, um das Senderfeld des EAS-Detektionssystems (100) adaptiv zu steuern, dadurch gekennzeichnet, dass
    die Systemsteuerung (110) ferner so konfiguriert ist:
    einen zweiten Abstand von dem zweiten Näherungssensor (108b) zu der ersten Person zu bestimmen; und
    zu bestimmen, ob der erste und der zweite Abstand gleich sind; oder die Systemsteuerung (110) ferner so konfiguriert ist:
    die Anwesenheit einer zweiten Person zu erkennen, die sich in der Nähe eines zweiten Pfostens (102b) des EAS- Detektionssystems (100) befindet, während sich die erste Person in der Nähe des ersten Pfostens (102a) befindet;
    einen zweiten Abstand von dem zweiten Pfosten (102b) zu der zweiten Person zu bestimmen; und
    festzustellen, ob der erste und der zweite Abstand gleich sind.
  10. EAS-Detektionssystem nach Anspruch 9, worin die Systemsteuerung (110) ferner konfiguriert ist, um zu bestimmen, ob sich die erste Person in einem hinteren Bereich eines Richtdiagramms (300) einer Antenne (302) des ersten Pfostens (102a) befindet.
  11. EAS- Detektionssystem nach Anspruch 10, worin die Systemsteuerung (110) so konfiguriert ist, dass sie den ersten Abstand nur dann zur adaptiven Steuerung des Senderfeldes verwendet, wenn erkannt wird, dass sich die erste Person nicht im hinteren Bereich des Richtdiagramms (300) der Antenne (302) des ersten Pfostens (102a) befindet.
  12. EAS-Detektionssystem nach Anspruch 10, worin die Systemsteuerung (110) so konfiguriert ist, dass sie den ersten Abstand verwendet, um das Senderfeld adaptiv zu steuern, wenn erkannt wird, dass sich die erste Person im hinteren Bereich des Richtdiagramms (300) der Antenne (302) des ersten Pfostens (102a) befindet, und wenn Abstandsinformationen, die einer im hinteren Bereich befindlichen Person zugeordnet sind, verwendet werden sollten, um die Sendeleistung eines Pfostens (102a, 102b) zu steuern.
  13. EAS-Detektionssystem nach Anspruch 9, worin die Systemsteuerung (110) ferner so konfiguriert ist, dass sie eine Sendeleistung des ersten Pfostens (102a) auf ein vorheriges Niveau zurücksetzt, wenn sich die erste Person aus einem Antennenfeldmuster herausbewegt.
  14. EAS-Detektionssystem gemäß der ersten Alternative des Anspruchs 9, worin die Systemsteuerung (110) ferner konfiguriert ist:
    entweder den ersten Abstand oder den zweiten Abstand zur Steuerung der Sendeleistung auszuwählen, wenn erkannt wird, dass der erste und der zweite Abstand gleich sind, oder einen kleinsten Abstand aus dem ersten und dem zweiten Abstand auszuwählen, wenn erkannt wird, dass der erste und der zweite Abstand nicht gleich sind; und
    den ersten, zweiten oder kleinsten Abstand verwenden, der zuvor zur Steuerung der Sendeleistung gewählt wurde.
  15. EAS-Detektionssystem gemäß der zweiten Alternative von Anspruch 9, worin entweder der erste Abstand oder der zweite Abstand zur Verwendung bei der Steuerung der Sendeleistung ausgewählt wird, wenn erkannt wird, dass der erste und der zweite Abstand gleich sind.
  16. EAS-Detektionssystem nach Anspruch 15, worin ein kleinster Abstand aus dem ersten und zweiten Abstand ausgewählt wird, wenn erkannt wird, dass der erste und zweite Abstand nicht gleich sind, und
    der kleinste Abstand zur Steuerung der Sendeleistung verwendet wird
    (A) wenn erkannt wird, dass die Person, die mit dem kleinsten Abstand assoziiert ist, sich nicht im hinteren Bereich des Richtdiagramms (300) der Antenne (302) des ersten Pfostens (102a) befindet, oder
    (B) wenn erkannt wird, dass die Person, die mit dem kleinsten Abstand assoziiert ist, sich im hinteren Bereich des Richtdiagramms (300) der Antenne (302) des ersten Pfostens (102a) befindet, und wenn Abstandsinformationen, die mit einer Person assoziiert sind, die sich im hinteren Bereich befindet, verwendet werden sollten, um die Sendeleistung eines Pfostens (102a, 102b) zu steuern.
EP15745119.6A 2014-08-05 2015-07-27 Systeme und verfahren zur adaptiven steuerung eines senderfeldes Active EP3178075B1 (de)

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US14/466,046 US9311796B2 (en) 2014-08-22 2014-08-22 Systems and methods for adaptively controlling a transmitter field
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CN106716506B (zh) 2021-09-03
CA2961875C (en) 2023-09-26
EP3809383B1 (de) 2023-12-27
CN106716506A (zh) 2017-05-24
EP3178075A1 (de) 2017-06-14
EP3809383A1 (de) 2021-04-21
AU2015298607A1 (en) 2017-03-23
KR102531482B1 (ko) 2023-05-10
CA2961875A1 (en) 2016-02-11
WO2016022313A1 (en) 2016-02-11
KR20170053622A (ko) 2017-05-16
AU2015298607B2 (en) 2017-04-13

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