WO2020147652A1 - 声磁防盗系统及其天线结构 - Google Patents

声磁防盗系统及其天线结构 Download PDF

Info

Publication number
WO2020147652A1
WO2020147652A1 PCT/CN2020/071313 CN2020071313W WO2020147652A1 WO 2020147652 A1 WO2020147652 A1 WO 2020147652A1 CN 2020071313 W CN2020071313 W CN 2020071313W WO 2020147652 A1 WO2020147652 A1 WO 2020147652A1
Authority
WO
WIPO (PCT)
Prior art keywords
acousto
theft system
antenna
magnetic anti
antenna body
Prior art date
Application number
PCT/CN2020/071313
Other languages
English (en)
French (fr)
Inventor
王志远
王希楠
刘卓拉
Original Assignee
广州齐达材料科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201910043103.9A external-priority patent/CN109697818A/zh
Priority claimed from CN201910043101.XA external-priority patent/CN109686034A/zh
Priority claimed from CN201910042946.7A external-priority patent/CN109686033A/zh
Application filed by 广州齐达材料科技有限公司 filed Critical 广州齐达材料科技有限公司
Publication of WO2020147652A1 publication Critical patent/WO2020147652A1/zh

Links

Images

Classifications

    • 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

Definitions

  • the present invention relates to the field of acoustic and magnetic technology, in particular to an acoustic and magnetic anti-theft system and its antenna structure.
  • the acousto-magnetic anti-theft system is one of the electronic commodity anti-theft systems. With its superior performance, it is widely used in various shopping malls to protect the goods on sale from theft.
  • the acousto-magnetic anti-theft system mainly includes a transmitting antenna, a receiving antenna and a control device. Its working principle is: the transmitting antenna regularly emits 58kHz electromagnetic wave signals to form an alternating magnetic field. When the acoustomagnetic sensor enters the alternating magnetic field (detection area), the sound The resonance frequency of the magnetic sensor is consistent with the carrier frequency in the alternating magnetic field, and generates a resonance signal with a frequency of about 58kHz.
  • the process of "transmitting signal-silent" is repeated during the timing silent time of the transmitting antenna (that is, when the transmitting antenna is working) ), the resonance signal will be received by the receiving antenna, and after the control device analyzes the resonance signal, it is determined that the acousto-magnetic sensor is detected and an alarm is triggered.
  • the transmitting antenna and the receiving antenna can be replaced by a transmitting and receiving antenna with a signal transmitting function and a signal receiving function.
  • acousto-magnetic anti-theft systems are generally vertical and buried.
  • the transmitting antenna and receiving antenna (or transmitting and receiving antenna) of the vertical acousto-magnetic anti-theft system are erected at the entrance and exit of the store.
  • the buried acoustic and magnetic anti-theft system because the antenna is buried under the ground, so the signal is transmitted up and down and does not take up space, so the buried acoustic and magnetic anti-theft system has better advantages, so it is more and more popular in the market. Welcome.
  • electromagnetic interference can be manifested as the electromagnetic wave signal emitted by the antenna is reflected by the electromagnetic interference source and received. This causes a false alarm; or it appears that the electromagnetic interference source emits an electromagnetic signal consistent with the antenna's working frequency and is received by the antenna, thereby causing a false alarm), which will affect the normal operation of the acousto-magnetic anti-theft system.
  • the existing method can also be used to reduce the electromagnetic interference in some unavoidable circumstances (for example, the shopping mall has no reasonable installation location).
  • the sensitivity of the transmitting antenna or the receiving sensitivity of the receiving antenna will greatly reduce the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag (generally reduced to 50cm or less), which greatly limits the sound Supporting use of magnetic soft tags.
  • the impact is relatively small.
  • the transmitting antenna of the vertical acousto-magnetic anti-theft system when the transmitting antenna of the vertical acousto-magnetic anti-theft system is close to a metal object (such as a metal counter, a metal shelf or a steel bar in a wall, etc.), or the vertical acousto-magnetic anti-theft system
  • a metal object such as a metal counter, a metal shelf or a steel bar in a wall, etc.
  • the receiving antenna is close to the electromagnetic interference source that continuously emits electromagnetic interference signals
  • the method of reducing the transmitting sensitivity of the transmitting antenna or the receiving sensitivity of the receiving antenna will make the effective anti-theft channel width of the vertical acousto-magnetic anti-theft system within 50cm.
  • the effective anti-theft channel can only pass one person at the same time, which is not conducive to the use of shopping malls with a large flow of people, thus greatly restricting the use of acoustic and magnetic soft tags.
  • the transmitting antenna As for the buried acoustic and magnetic anti-theft system, because the transmitting antenna is installed under the ground, the transmitting antenna will be close to many steel bars under the ground, and the method of reducing the transmitting sensitivity of the transmitting antenna or the receiving sensitivity of the receiving antenna will be
  • the effective anti-theft height of the buried acoustic and magnetic anti-theft system is within 50cm, while the waist height of most people in the world is about 1.2, and most of the hand-held goods are slightly lower than the waist height (generally above 50cm), so The buried anti-theft system can hardly be used normally for acousto-magnetic soft tags.
  • the purpose of the present invention is to provide an acousto-magnetic anti-theft system and its antenna structure, which does not need to reduce the sensitivity of the antenna even if it is close to the electromagnetic interference source, ensuring that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be large. Lowering, thereby facilitating the supporting use of the acoustic and magnetic anti-theft system for the acoustic and magnetic soft tags.
  • an embodiment of the present invention provides an antenna structure of an acousto-magnetic anti-theft system, which includes: an antenna body and an absorbing material made of a absorbing material and used for absorbing electromagnetic wave signals in a first frequency range.
  • Wave layer
  • the antenna body has a first surface for sending electromagnetic wave signals to the acousto-magnetic sensor and/or receiving electromagnetic wave signals from the acousto-magnetic sensor, and has a second surface for facing the electromagnetic interference source; the first The surface and the second surface are located on different sides of the antenna body;
  • the second surface of the antenna body is provided with the wave absorbing layer
  • the first frequency range is consistent with the operating frequency range of the antenna body and consistent with the electromagnetic interference frequency range of the electromagnetic interference source.
  • another embodiment of the present invention provides an acousto-magnetic anti-theft system, including the antenna structure described in any one of the above.
  • the acousto-magnetic anti-theft system and its antenna structure provided by the embodiments of the present invention are provided with the absorbing layer on the second surface of the antenna body that faces the electromagnetic interference source, In this way, the absorbing layer will absorb the electromagnetic wave signal sent by the antenna body to the electromagnetic interference source, avoiding: the electromagnetic wave signal sent by the antenna body to the electromagnetic interference source is reflected back and interferes with the electromagnetic interference source.
  • the normal operation of the antenna of the acousto-magnetic anti-theft system; or, the wave-absorbing layer will absorb the electromagnetic wave signal sent by the electromagnetic interference source to the antenna body to prevent it from affecting the normal operation of the antenna body.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the source of electromagnetic interference, without reducing the sensitivity of the antenna of the acousto-magnetic anti-theft system , To ensure that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • another embodiment of the present invention provides an antenna body of an acousto-magnetic anti-theft system, which includes: the antenna body and a wave absorbing material made of a wave absorbing material for absorbing electromagnetic wave signals in a first frequency range Floor;
  • the antenna body has a first surface for sending electromagnetic wave signals to the acousto-magnetic sensor and/or receiving electromagnetic wave signals from the acousto-magnetic sensor, and has a second surface for facing at least one source of electromagnetic interference;
  • the first surface and the second surface are located on different sides of the antenna body;
  • the absorbing layer is used to be arranged between the second surface and the at least one electromagnetic interference source;
  • the first frequency range is consistent with the operating frequency range of the antenna body and consistent with the electromagnetic interference frequency range of the at least one electromagnetic interference source.
  • the acousto-magnetic anti-theft system provided by the embodiment of the present invention is provided with the absorbing layer between the electromagnetic interference source and the second surface of the antenna body.
  • the wave-absorbing layer absorbs the electromagnetic wave signal sent by the antenna body to the electromagnetic interference source, avoiding the electromagnetic wave signal sent by the antenna body to the electromagnetic interference source, and then reflected back to interfere with the sound and magnetic
  • the antenna of the anti-theft system works normally; or, the wave-absorbing layer will absorb the electromagnetic wave signal sent by the electromagnetic interference source to the antenna body to prevent it from affecting the normal operation of the antenna body.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the source of electromagnetic interference, without reducing the sensitivity of the antenna of the acousto-magnetic anti-theft system , To ensure that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • another embodiment of the present invention provides an antenna body of an acousto-magnetic anti-theft system, which includes: the antenna body and at least two absorbing materials made of absorbing materials and used to absorb electromagnetic wave signals in a first frequency range Absorbing layer
  • the antenna body has a first surface for sending electromagnetic wave signals to the acousto-magnetic sensor and/or receiving electromagnetic wave signals from the acousto-magnetic sensor, and has at least two surfaces for one-to-one correspondence toward at least two electromagnetic interference sources.
  • a second surface; at least two of the second surface and the first surface are located on different sides of the antenna body;
  • At least two of the wave-absorbing layers are configured to be provided between at least two of the second surfaces and at least two of the electromagnetic interference sources in a one-to-one correspondence, and are configured to face at least two of the second surfaces in a one-to-one correspondence.
  • the first frequency range is consistent with the operating frequency range of the antenna body and consistent with the electromagnetic interference frequency ranges of at least two electromagnetic interference sources.
  • the acousto-magnetic anti-theft system provided by the embodiment of the present invention is provided with a corresponding one between each electromagnetic interference source and each second surface of the antenna body A wave-absorbing layer, and the wave-absorbing layer faces the corresponding second surface or covers the corresponding electromagnetic interference source, so that the wave-absorbing layer will absorb the electromagnetic wave signal sent by the antenna body to the electromagnetic interference source , Avoiding: the electromagnetic wave signal sent by the antenna body to the electromagnetic interference source is reflected back to interfere with the normal operation of the antenna of the acousto-magnetic anti-theft system; or, the wave-absorbing layer will absorb the electromagnetic The electromagnetic wave signal sent by the interference source to the antenna body prevents it from affecting the normal operation of the antenna body.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the source of electromagnetic interference, without reducing the sensitivity of the antenna of the acousto-magnetic anti-theft system , To ensure that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • Figure 1 is a schematic structural diagram of the first acoustic and magnetic anti-theft system provided by an embodiment of the present invention
  • Figure 2 is a schematic structural diagram of a second acousto-magnetic anti-theft system provided by an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a third acoustic and magnetic anti-theft system provided by an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a fourth acoustic and magnetic anti-theft system according to an embodiment of the present invention.
  • FIGS. 1 to 4 is a schematic diagram of one of the antenna structures of the acoustic and magnetic anti-theft system in FIGS. 1 to 4;
  • Fig. 6 is a schematic diagram of one installation of the antenna body of the acousto-magnetic anti-theft system in Figs. 1 to 4;
  • FIG. 7 is a schematic structural diagram of a fifth acoustic and magnetic anti-theft system according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a sixth acoustic and magnetic anti-theft system provided by an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a seventh acoustic and magnetic anti-theft system provided by an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of an eighth acousto-magnetic anti-theft system provided by an embodiment of the present invention.
  • Figure 11 is a schematic diagram of the installation of the antenna body of the acousto-magnetic anti-theft system in Figures 7-10;
  • FIG. 12 is a schematic structural diagram of a ninth acousto-magnetic anti-theft system provided by an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a tenth acousto-magnetic anti-theft system provided by an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of an eleventh acousto-magnetic anti-theft system provided by an embodiment of the present invention.
  • 15 is a schematic structural diagram of a twelfth acousto-magnetic anti-theft system provided by an embodiment of the present invention.
  • Fig. 16 is a schematic diagram of one installation of the antenna body of the acousto-magnetic anti-theft system in Figs. 12-15.
  • first, second, third, etc. in the specification and claims are only used to distinguish the description of the same technical features, and cannot be understood as indicating or implying relative importance or implicitly specifying the indicated technical features
  • the number does not necessarily describe the order or time sequence.
  • the terms are interchangeable under appropriate circumstances.
  • the features defined as “first” and “second” may include at least one of the features either explicitly or implicitly.
  • the electromagnetic interference (the frequency range of electromagnetic interference is consistent with the working frequency range of the antenna) of the electromagnetic interference source to the antenna of the acousto-magnetic anti-theft system mainly has the following methods:
  • the electromagnetic wave signal sent by the transmitting and receiving antenna of the acousto-magnetic anti-theft system reaches the electromagnetic interference source, and is reflected back and received by the transmitting and receiving antenna;
  • the electromagnetic interference signal emitted by the electromagnetic interference source is received by the receiving antenna of the acousto-magnetic anti-theft system
  • the electromagnetic interference signal emitted by the electromagnetic interference source is received by the transmitting and receiving antenna of the acousto-magnetic anti-theft system.
  • the electromagnetic interference caused by the electromagnetic interference source to the antenna of the acousto-magnetic anti-theft system is not limited to the above-mentioned methods, and can also be other methods, which will not be explained here.
  • the embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes: an antenna structure for transmitting electromagnetic wave signals, a receiving antenna, a transmitting circuit 5 for driving the antenna structure to transmit electromagnetic wave signals, and The receiving circuit 6, the control device 7 and the alarm device 8 for receiving electromagnetic wave signals by the receiving antenna.
  • the antenna structure includes: an antenna body 1 and a wave absorbing layer 2 made of a wave absorbing material and used to absorb electromagnetic wave signals in a first frequency range; the antenna body 1 (a transmitting antenna) has a The first surface 10 of the acousto-magnetic sensor emits electromagnetic wave signals and has a second surface 11 facing the electromagnetic interference source 3; the first surface 10 and the second surface 11 are located on different sides of the antenna body 1; The second surface 11 of the antenna body 1 is provided with the wave absorbing layer 2.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1; the electromagnetic interference source 3 has the ability to reflect electromagnetic wave signals in the first frequency range. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the second surface 11 of the antenna body 1 to the electromagnetic interference source 3 will be absorbed by the wave absorbing layer 2.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the transmitting antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the emission of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna and/or the receiving antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, thereby facilitating the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • the antenna body 1 and the receiving antenna are arranged opposite and spaced apart, and both are arranged upright, that is, the acousto-magnetic anti-theft system is a vertical acousto-magnetic anti-theft system, and the electromagnetic interference source 3 may be metal Steel bars in counters, metal shelves or walls, etc.
  • the antenna body 1 and the receiving antenna can also be buried in a concealed place such as an installation pit on the ground, an installation pit on a wall, or a hollow area on the ceiling, that is, the acoustic magnetic
  • the anti-theft system is a concealed acousto-magnetic anti-theft system.
  • the acousto-magnetic anti-theft system is an underground acousto-magnetic anti-theft system
  • the electromagnetic interference source 3 may be Install the steel bars around the pit.
  • the electromagnetic interference source 3 may be steel bars around the installation pit.
  • the number of the electromagnetic interference source 3 can be one or more than one, and correspondingly, the number of the second surface 11 can be one or more, for example, the top of the antenna body 1
  • the surface is the first surface 10.
  • the bottom surface of the antenna body 1 is the second surface 11.
  • the electromagnetic interference source 3 is dispersed on the outside of the bottom, left and right sides of the antenna body 1, the bottom, left and right sides of the antenna body 1 may all be the first Two surface 11.
  • the wave-absorbing layer 2 should cover the second surface 11 to ensure that the second surface 11 of the antenna body 1 sends electromagnetic wave signals to the electromagnetic interference source 3, which will be The absorbing layer 2 completely absorbs.
  • the area of the wave-absorbing layer 2 may be slightly smaller than the area of the second surface 11, as long as it is ensured that the electromagnetic wave signal emitted by the second surface 11 of the antenna body 1 does not reach the electromagnetic interference source 3 in large quantities.
  • the antenna structure further includes a fixing device; the wave absorbing layer 2 is fixed on the second surface 11 of the antenna body 1 by the fixing device, such that The wave-absorbing layer 2 can be firmly fixed on the antenna body 1, so that the entire antenna structure is integrated, which is beneficial to the installation of the acoustic and magnetic anti-theft system.
  • the absorbing layer 2 can also be fixed on the second surface 11 of the antenna body 1 by a fixing method such as pasting or welding.
  • the fixing device includes a fixing frame 4; the top surface of the fixing frame 4 is recessed with a mounting groove, the wave absorbing layer 2 is laid on the bottom of the mounting groove, and the antenna body 1 is fixed in the installation groove and located on the top of the wave absorbing layer 2, and the second surface 11 of the antenna body 1 faces the wave absorbing layer 2.
  • the fixing device may also include a fastener or a clamping structure, etc., which is not specifically limited herein.
  • the absorbing layer 2 is a absorbing layer made of a absorbing material with a magnetic permeability ⁇ 2 Henry/m, so that the absorbing layer 2 has good electromagnetic waves.
  • the absorbing material is a composite material made of Fe powder and insulating material, Fe-Si powder and insulating material, Fe-Si-Al powder and insulating material, or Fe-Ni powder and insulating material, or the absorbing material
  • the material is ferrite material.
  • the wave absorbing layer 2 has a block structure, a sheet structure or a curved structure, etc., which is not specifically limited herein.
  • the first frequency range is 20-200khz, preferably 58khz.
  • an embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes: an antenna structure for transmitting and receiving electromagnetic wave signals, a transmitting circuit 5 for driving the antenna structure to transmit electromagnetic wave signals, and Said antenna structure receives electromagnetic wave signal receiving circuit 6, control device 7 and alarm device 8.
  • the antenna structure includes an antenna body 1 and a wave absorbing layer 2 made of a wave absorbing material and used to absorb electromagnetic wave signals in a first frequency range;
  • the antenna body 1 (a transmitting and receiving antenna) has a The first surface 10 of the acousto-magnetic sensor emits electromagnetic wave signals and has a second surface 11 facing the electromagnetic interference source 3; the first surface 10 and the second surface 11 are located on different sides of the antenna body 1; The second surface 11 of the antenna body 1 is provided with the wave absorbing layer 2.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1; the electromagnetic interference source 3 has the ability to reflect electromagnetic wave signals in the first frequency range. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the second surface 11 of the antenna body 1 to the electromagnetic interference source 3 will be absorbed by the wave absorbing layer 2.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • the embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes: an antenna structure for transmitting and receiving electromagnetic wave signals, a transmitting circuit 5 for driving the antenna structure to transmit electromagnetic wave signals, and Said antenna structure receives electromagnetic wave signal receiving circuit 6, control device 7 and alarm device 8.
  • the antenna structure includes an antenna body 1 and a wave absorbing layer 2 made of a wave absorbing material and used for absorbing electromagnetic wave signals in a first frequency range;
  • the antenna body 1 (a transmitting and receiving antenna) has an antenna for receiving
  • the first surface 10 of the electromagnetic wave signal emitted by the acousto-magnetic sensor has a second surface 11 for facing the electromagnetic interference source 3; the first surface 10 and the second surface 11 are located on the antenna body 1 Different sides; the second surface 11 of the antenna body 1 is provided with the absorbing layer 2.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1;
  • the electromagnetic interference source 3 has the ability to reflect electromagnetic wave signals in the first frequency range. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the electromagnetic interference source 3 to the second surface 11 of the antenna body 1 will be absorbed by the wave absorbing layer 2.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • the embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes: an antenna structure for receiving electromagnetic wave signals, a transmitting antenna 9, a transmitting circuit 5 for driving the transmitting antenna 9 to transmit electromagnetic wave signals, and The receiving circuit 6, the control device 7, and the alarm device 8 are used to drive the antenna structure to receive electromagnetic wave signals.
  • the antenna structure includes an antenna body 1 and a wave absorbing layer 2 made of a wave absorbing material and used to absorb electromagnetic wave signals in a first frequency range; the antenna body 1 (a receiving antenna) has a sound-absorbing layer 2
  • the first surface 10 of the electromagnetic wave signal emitted by the magnetic sensor has a second surface 11 for facing the electromagnetic interference source 3; the first surface 10 and the second surface 11 are located on different sides of the antenna body 1; The second surface 11 of the antenna body 1 is provided with the wave absorbing layer 2.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1; the electromagnetic interference source 3 has the ability to emit electromagnetic wave signals in the first frequency range. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the electromagnetic interference source 3 to the second surface 11 of the antenna body 1 will be absorbed by the wave absorbing layer 2.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • an embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes: an antenna body 1 for transmitting electromagnetic wave signals, a receiving antenna 4, and a transmitting circuit 5 for driving the antenna body 1 to transmit electromagnetic wave signals.
  • the antenna body 1 (a transmitting antenna) has a first surface 10 for sending electromagnetic wave signals to the acousto-magnetic sensor, and a second surface 11 for facing at least one electromagnetic interference source 3;
  • the surface 10 and the second surface 11 are located on different sides of the antenna body 1;
  • the absorbing layer 2, which is made of a absorbing material, is used to absorb electromagnetic wave signals in the first frequency range and is used to install Between the second surface 11 and the at least one electromagnetic interference source 3.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1; the at least one electromagnetic interference source 3 has the ability to reflect electromagnetic wave signals in the first frequency range. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent to the at least one electromagnetic interference source 3 by the second surface 11 of the antenna body 1 will be absorbed by the wave absorbing layer 2.
  • the absorbing layer 2 is provided between the electromagnetic interference source 3 and the second surface 11 of the antenna body 1, so that the absorbing layer 2 will absorb the antenna
  • the main body 1 sends the electromagnetic wave signal to the electromagnetic interference source 3 to avoid: the electromagnetic wave signal sent by the antenna main body 1 to the electromagnetic interference source 3 is reflected back and interferes with the normal operation of the receiving antenna 4.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the transmitting antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the emission of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna and/or the receiving antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, thereby facilitating the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • the antenna body 1 and the receiving antenna are arranged opposite and spaced apart, and both are arranged upright, that is, the acousto-magnetic anti-theft system is a vertical acousto-magnetic anti-theft system, and the electromagnetic interference source 3 may be metal Steel bars in counters, metal shelves or walls, etc.
  • the antenna body 1 and the receiving antenna can also be buried in a concealed place such as an installation pit on the ground, an installation pit on a wall, or a hollow area on the ceiling, that is, the acoustic magnetic
  • the anti-theft system is a concealed acousto-magnetic anti-theft system.
  • the acousto-magnetic anti-theft system is an underground acousto-magnetic anti-theft system
  • the electromagnetic interference source 3 may be around the installation pit.
  • the electromagnetic interference source 3 may be steel bars around the installation pit.
  • the antenna body 1 is used to be installed in an installation pit, and the installation pit is provided with
  • the at least one electromagnetic interference source 3 for example, steel bars under the ground
  • the wave absorbing layer 2 is used to be laid in the installation pit to cover the at least one electromagnetic interference source 3.
  • the number of the electromagnetic interference source 3 can be one or more than one, and correspondingly, the number of the second surface 11 can be one or more, for example, the top of the antenna body 1
  • the surface is the first surface 10.
  • the bottom surface of the antenna body 1 is the second surface 11.
  • the electromagnetic interference source 3 is dispersed on the outside of the bottom, left and right sides of the antenna body 1, the bottom, left and right sides of the antenna body 1 may all be the first Two surface 11.
  • the positional relationship between the absorbing layer 2 and the second surface 11 and the electromagnetic interference source 3 may specifically be: the absorbing layer 2 is also used to face and approach the second surface 11 Or cover the at least one electromagnetic interference source 3.
  • the wave absorbing layer 2 when used to face the second surface 11 of the antenna body 1 and is arranged at a distance therefrom, it is best that the wave absorbing layer 2 can be as close as possible to the antenna
  • the second surface 11 of the body 1 and the length and width dimensions of the wave-absorbing layer 2 are greater than or equal to the length and width dimensions of the second surface 11 of the antenna body 1 to ensure the antenna body 1
  • the electromagnetic wave signal sent by the second surface 11 to the electromagnetic interference source 3 will be completely absorbed by the wave absorbing layer 2.
  • the length and width dimensions of the wave-absorbing layer 2 can be slightly smaller than the length and width dimensions of the second surface 11, as long as it is ensured that the electromagnetic wave signals emitted by the second surface 11 of the antenna body 1 do not reach the electromagnetic interference source in large quantities. 3 is fine.
  • the form of covering the at least one electromagnetic interference source 3 with the wave-absorbing layer 2 may be: partially covering the at least one electromagnetic interference source 3 (that is, the direction of each electromagnetic interference source 3 toward the The surface of the antenna body is covered), or it can be: all the at least one electromagnetic interference source 3 (that is, the one electromagnetic interference source 3 is wrapped).
  • the absorbing layer 2 is a absorbing layer made of a absorbing material with a magnetic permeability ⁇ 2 Henry/m, so that the absorbing layer 2 has good electromagnetic waves.
  • the absorbing material is a composite material made of Fe powder and insulating material, Fe-Si powder and insulating material, Fe-Si-Al powder and insulating material, or Fe-Ni powder and insulating material, or the absorbing material
  • the material is ferrite material.
  • the wave absorbing layer 2 has a block structure, a sheet structure or a curved structure, etc., which is not specifically limited herein.
  • the first frequency range is 20-200khz, preferably 58khz.
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • an embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes an antenna body 1 for transmitting and receiving electromagnetic wave signals, a transmitting circuit 5 for driving the antenna body 1 to transmit electromagnetic wave signals, and A receiving circuit 6, a control device 7, an alarm device 8 and a wave absorbing layer 2 that drive the antenna body 1 to receive electromagnetic wave signals.
  • the antenna body 1 (a transmitting and receiving antenna) has a first surface 10 for sending electromagnetic wave signals to the acousto-magnetic sensor, and a second surface 11 for facing at least one electromagnetic interference source 3; A surface 10 and the second surface 11 are located on different sides of the antenna body 1; the wave absorbing layer 2 is used to be arranged between the second surface 11 and the at least one electromagnetic interference source 3.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1; the at least one electromagnetic interference source 3 has the ability to reflect electromagnetic wave signals in the first frequency range. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent to the at least one electromagnetic interference source 3 by the second surface 11 of the antenna body 1 will be absorbed by the wave absorbing layer 2.
  • the absorbing layer 2 is provided between the electromagnetic interference source 3 and the second surface 11 of the antenna body 1, so that the absorbing layer 2 will absorb the antenna
  • the main body 1 sends the electromagnetic wave signal to the electromagnetic interference source 3 to avoid: the electromagnetic wave signal sent by the antenna main body 1 to the electromagnetic interference source 3 is reflected back and interferes with the normal operation of the antenna main body 1.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • an embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes: an antenna body 1 for transmitting and receiving electromagnetic wave signals, a transmitting circuit 5 for driving the antenna body 1 to emit electromagnetic wave signals, and A receiving circuit 6, a control device 7, an alarm device 8 and a wave absorbing layer 2 that drive the antenna body 1 to receive electromagnetic wave signals.
  • the antenna body 1 (a transmitting and receiving antenna) has a first surface 10 for receiving electromagnetic wave signals emitted by the acousto-magnetic sensor, and a second surface 11 for facing at least one electromagnetic interference source 3;
  • the first surface 10 and the second surface 11 are located on different sides of the antenna body 1; the absorbing layer 2 is used to be disposed between the second surface 11 and the at least one electromagnetic interference source 3 between.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1; the at least one electromagnetic interference source 3 has the ability to emit electromagnetic wave signals in the first frequency range. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the at least one electromagnetic interference source 3 to the second surface 11 of the antenna body 1 will be absorbed by the wave absorbing layer 2.
  • the absorbing layer 2 is provided between the electromagnetic interference source 3 and the second surface 11 of the antenna body 1, so that the absorbing layer 2 will absorb the electromagnetic
  • the electromagnetic wave signal sent by the interference source 3 to the antenna body 1 is prevented from affecting the normal operation of the antenna body 1. It can be seen that the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • the embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes: an antenna body 1 for receiving electromagnetic wave signals, a transmitting antenna 9, and a transmitting circuit 5 for driving the transmitting antenna 9 to transmit electromagnetic wave signals.
  • the antenna body 1 (receiving antenna) has a first surface 10 for receiving electromagnetic wave signals emitted by an acousto-magnetic sensor, and a second surface 11 for facing at least one electromagnetic interference source 3; A surface 10 and the second surface 11 are located on different sides of the antenna body 1; the wave absorbing layer 2 is used to be arranged between the second surface 11 and the at least one electromagnetic interference source 3.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1; the at least one electromagnetic interference source 3 has the ability to emit electromagnetic wave signals in the first frequency range. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the at least one electromagnetic interference source 3 to the second surface 11 of the antenna body 1 will be absorbed by the wave absorbing layer 2.
  • the absorbing layer 2 is provided between the electromagnetic interference source 3 and the second surface 11 of the antenna body 1, so that the absorbing layer 2 will absorb the electromagnetic
  • the electromagnetic wave signal sent by the interference source 3 to the antenna body 1 is prevented from affecting the normal operation of the antenna body 1. It can be seen that the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • the embodiment of the present invention provides an anti-electromagnetic interference acoustic and magnetic anti-theft system, which includes: an antenna body 1 for transmitting electromagnetic wave signals, a receiving antenna 4, and a device for driving the antenna body 1 to transmit electromagnetic wave signals.
  • a transmitting circuit 5 a receiving circuit 6 for driving the receiving antenna 4 to receive electromagnetic wave signals, an alarm device 8 and at least two wave absorbing layers 2.
  • the antenna body 1 (a transmitting antenna) has a first surface 10 for sending electromagnetic wave signals to the acousto-magnetic sensor, and has at least two second surfaces 10 for one-to-one correspondence facing at least two electromagnetic interference sources 3.
  • Surface 11; at least two of the second surface 11 and the first surface 10 are located on different sides of the antenna body 1; at least two of the absorbing layers 2 are made of absorbing materials, which are used to absorb
  • the electromagnetic wave signal in the first frequency range is used to be provided between at least two second surfaces 11 and at least two electromagnetic interference sources 3 in a one-to-one correspondence, and used to face at least two electromagnetic interference sources 3 in a one-to-one correspondence.
  • the second surface 11 may cover at least two electromagnetic interference sources 3.
  • At least two of the electromagnetic interference sources 3 have the ability to reflect electromagnetic wave signals in the first frequency range.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1 and consistent with the electromagnetic interference frequency ranges of at least two electromagnetic interference sources 3. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the second surface 11 of the antenna body 1 to the electromagnetic interference source 3 will be absorbed by the wave absorbing layer 2.
  • the corresponding absorbing layer 2 is provided between each electromagnetic interference source 3 and each second surface 11 of the antenna body 1, and the absorbing layer 2 Facing the corresponding second surface 11 or covering the corresponding electromagnetic interference source 3, so that the absorbing layer 2 will absorb the electromagnetic wave signal sent by the antenna body 1 to the electromagnetic interference source 3, avoiding: The electromagnetic wave signal sent by the antenna body 1 to the electromagnetic interference source 3 is reflected back to interfere with the normal operation of the receiving antenna 4.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the transmitting antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the emission of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna and/or the receiving antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, thereby facilitating the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • the antenna body 1 and the receiving antenna are arranged opposite and spaced apart, and both are arranged upright, that is, the acousto-magnetic anti-theft system is a vertical acousto-magnetic anti-theft system, and the electromagnetic interference source 3 may be metal Steel bars in counters, metal shelves or walls, etc.
  • the antenna body 1 and the receiving antenna can also be buried in a concealed place such as an installation pit on the ground, an installation pit on a wall, or a hollow area on the ceiling, that is, the acoustic magnetic
  • the anti-theft system is a concealed acousto-magnetic anti-theft system.
  • the acousto-magnetic anti-theft system is an underground acousto-magnetic anti-theft system
  • the electromagnetic interference source 3 may be around the installation pit.
  • the electromagnetic interference source 3 may be steel bars around the installation pit.
  • the antenna body 1 is installed in an installation pit, and the circumference of the installation pit is provided with at least Two electromagnetic interference sources 3 (for example, steel bars under the ground); at least two absorbing layers 2 are provided in the installation pit, and cover at least two electromagnetic interference sources 3 in a one-to-one correspondence.
  • the electromagnetic interference sources 3 for example, steel bars under the ground
  • at least two absorbing layers 2 are provided in the installation pit, and cover at least two electromagnetic interference sources 3 in a one-to-one correspondence.
  • this embodiment Compared with using a whole absorbing layer 2 to isolate the electromagnetic interference of at least two electromagnetic interference sources 3 to the antenna, this embodiment only needs to cover a small area corresponding to the positions of at least two electromagnetic interference sources 3 The wave absorbing layer 2 is sufficient, thereby reducing the use area and material cost of the wave absorbing layer 2.
  • the second surfaces 11 may be located on the same side or different sides of the antenna body 1.
  • the side surface can be regarded as a whole large surface subject to electromagnetic interference.
  • the top surface of the antenna body 1 is the first surface 10.
  • the bottom surface of the antenna body 1 corresponds to The multiple local areas facing the multiple electromagnetic interference sources 3 can all be regarded as one of the second surfaces 11.
  • the electromagnetic interference source 3 is dispersed on the outside of the bottom, left, and right sides of the antenna body 1, the bottom, left, and right sides of the antenna body 1 can all be regarded as all Mentioned second surface 11.
  • the wave absorbing layer 2 when used to face the second surface 11 of the antenna body 1 and is arranged at a distance therefrom, it is best that the wave absorbing layer 2 can be as close as possible to the antenna
  • the second surface 11 of the body 1 and the length and width dimensions of the wave-absorbing layer 2 are greater than or equal to the length and width dimensions of the second surface 11 of the antenna body 1 to ensure the antenna body 1
  • the electromagnetic wave signal sent by the second surface 11 to the electromagnetic interference source 3 will be completely absorbed by the wave absorbing layer 2.
  • the length and width dimensions of the wave-absorbing layer 2 can be slightly smaller than the length and width dimensions of the second surface 11, as long as it is ensured that the electromagnetic wave signals emitted by the second surface 11 of the antenna body 1 do not reach the electromagnetic interference source in large quantities. 3 is fine.
  • the absorbing layer 2 is a absorbing layer made of a absorbing material with a magnetic permeability ⁇ 2 Henry/m, so that the absorbing layer 2 has good electromagnetic waves.
  • the absorbing material is a composite material made of Fe powder and insulating material, Fe-Si powder and insulating material, Fe-Si-Al powder and insulating material, or Fe-Ni powder and insulating material, or the absorbing material
  • the material is ferrite material.
  • the wave absorbing layer 2 has a block structure, a sheet structure or a curved structure, etc., which is not specifically limited herein.
  • the first frequency range is 20-200khz, preferably 58khz.
  • an embodiment of the present invention provides an anti-electromagnetic interference acoustic and magnetic anti-theft system, which includes: an antenna body 1 for transmitting and receiving electromagnetic wave signals; a transmitting circuit for driving the antenna body 1 to transmit electromagnetic wave signals 5.
  • the antenna body 1 (a transmitting and receiving antenna) has a first surface 10 for sending electromagnetic wave signals to the acousto-magnetic sensor, and has at least two second surfaces for one-to-one correspondence to at least two electromagnetic interference sources 3
  • Two surfaces 11; at least two of the second surface 11 and the first surface 10 are located on different sides of the antenna body 1; at least two of the absorbing layers 2 are made of absorbing materials, which are used for Absorb the electromagnetic wave signal in the first frequency range for one-to-one correspondence between at least two second surfaces 11 and at least two electromagnetic interference sources 3, and for one-to-one correspondence to at least two
  • the second surface 11 may cover at least two electromagnetic interference sources 3. At least two of the electromagnetic interference sources 3 have the ability to reflect electromagnetic wave signals in the first frequency range.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1 and consistent with the electromagnetic interference frequency ranges of at least two electromagnetic interference sources 3. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the second surface 11 of the antenna body 1 to the electromagnetic interference source 3 will be absorbed by the wave absorbing layer 2.
  • the corresponding absorbing layer 2 is provided between each electromagnetic interference source 3 and each second surface 11 of the antenna body 1, and the absorbing layer 2 Facing the corresponding second surface 11 or covering the corresponding electromagnetic interference source 3, so that the absorbing layer 2 will absorb the electromagnetic wave signal sent by the antenna body 1 to the electromagnetic interference source 3, avoiding: The electromagnetic wave signal sent by the antenna body 1 to the electromagnetic interference source 3 is reflected back and interferes with the normal operation of the antenna body 1.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • Embodiment 11 is a diagrammatic representation of Embodiment 11:
  • an embodiment of the present invention provides an anti-electromagnetic interference acoustic and magnetic anti-theft system, which includes: an antenna body for transmitting and receiving electromagnetic wave signals; a transmitting circuit for driving the antenna body 1 to transmit electromagnetic wave signals 5.
  • the antenna body 1 (a transmitting and receiving antenna) has a first surface 10 for receiving electromagnetic wave signals emitted by the acousto-magnetic sensor, and has at least two electromagnetic interference sources 3 for one-to-one correspondence.
  • Two second surfaces 11; at least two of the second surfaces 11 and the first surface 10 are located on different sides of the antenna body 1; at least two of the absorbing layers 2 are made of absorbing materials, It is used to absorb electromagnetic wave signals in the first frequency range, is used to set at least two second surfaces 11 and at least two electromagnetic interference sources 3 in one-to-one correspondence, and is used to face at least
  • the two second surfaces 11 may cover at least two electromagnetic interference sources 3.
  • At least two electromagnetic interference sources 3 have the ability to emit electromagnetic wave signals in the first frequency range.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1 and consistent with the electromagnetic interference frequency ranges of at least two electromagnetic interference sources 3. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the electromagnetic interference source 3 to the second surface 11 of the antenna body 1 will be absorbed by the wave absorbing layer 2.
  • the corresponding absorbing layer 2 is provided between each electromagnetic interference source 3 and each second surface 11 of the antenna body 1, and the absorbing layer 2 Toward the corresponding second surface 11 or cover the corresponding electromagnetic interference source 3, so that the absorbing layer 2 will absorb the electromagnetic wave signal sent by the electromagnetic interference source 3 to the antenna body 1 to avoid its influence To the normal operation of the antenna body 1.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.
  • Embodiment 12 is a diagrammatic representation of Embodiment 12
  • an embodiment of the present invention provides an acousto-magnetic anti-theft system, which includes: an antenna body 1 for receiving electromagnetic wave signals, a transmitting antenna, a transmitting circuit 5 for driving the transmitting antenna to transmit electromagnetic wave signals, and The receiving circuit 6, the control device 7, the alarm device 8 and at least two absorbing layers 2 that drive the antenna body 1 to receive electromagnetic wave signals.
  • the antenna body 1 (receiving antenna) has a first surface 10 for receiving electromagnetic wave signals emitted by an acousto-magnetic sensor, and has at least two second surfaces 10 for facing at least two electromagnetic interference sources 3 in a one-to-one correspondence.
  • Two surfaces 11; at least two of the second surface 11 and the first surface 10 are located on different sides of the antenna body 1; at least two of the absorbing layers 2 are made of absorbing materials, which are used for Absorb the electromagnetic wave signal in the first frequency range for one-to-one correspondence between at least two second surfaces 11 and at least two electromagnetic interference sources 3, and for one-to-one correspondence to at least two
  • the second surface 11 may cover at least two electromagnetic interference sources 3.
  • At least two electromagnetic interference sources 3 have the ability to emit electromagnetic wave signals in the first frequency range.
  • the first frequency range is consistent with the operating frequency range of the antenna body 1 and consistent with the electromagnetic interference frequency ranges of at least two electromagnetic interference sources 3. In this way, when the acousto-magnetic anti-theft system is installed, the electromagnetic wave signal sent by the electromagnetic interference source 3 to the second surface 11 of the antenna body 1 will be absorbed by the wave absorbing layer 2.
  • the corresponding absorbing layer 2 is provided between each electromagnetic interference source 3 and each second surface 11 of the antenna body 1, and the absorbing layer 2 Toward the corresponding second surface 11 or cover the corresponding electromagnetic interference source 3, so that the absorbing layer 2 will absorb the electromagnetic wave signal sent by the electromagnetic interference source 3 to the antenna body 1 to avoid its influence To the normal operation of the antenna body 1.
  • the embodiment of the present invention can improve the electromagnetic anti-interference ability of the antenna of the acousto-magnetic anti-theft system, so that the antenna of the acousto-magnetic anti-theft system can work normally even if it is close to the electromagnetic interference source 3 without reducing the transmission and reception of the acousto-magnetic anti-theft system.
  • the sensitivity of the antenna ensures that the detection distance of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag will not be greatly reduced, which is beneficial to the supporting use of the acousto-magnetic anti-theft system to the acousto-magnetic soft tag.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

一种声磁防盗系统及其天线结构，天线结构包括：天线本体（1）以及由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层（2）；天线本体（1），具有用于发出和/或接收电磁波信号的第一表面（10），并具有用于朝向电磁干扰源（3）的第二表面（11）；第一表面（10）与第二表面（11）位于天线本体（1）的不同侧；天线本体（1）的第二表面（11）上设有吸波层（2）；第一频率范围，与天线本体（1）的工作频率范围相一致，并与电磁干扰源（3）的电磁干扰频率范围相一致。确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。

Description

声磁防盗系统及其天线结构 技术领域
本发明涉及声磁技术领域，尤其是涉及一种声磁防盗系统及其天线结构。
背景技术
声磁防盗系统作为电子商品防盗系统之一，以其优越的性能而被广泛地应用于各商场中，用来保护在售商品不被盗窃。声磁防盗系统主要包括发射天线、接收天线和控制装置三部分，其工作原理为：发射天线定时发射58kHz电磁波信号以形成交变磁场，当声磁传感器进入交变磁场(检测区)时，声磁传感器谐振频率由于与交变磁场内的载波频率一致，而产生频率约为58kHz的共振信号，在发射天线的定时静默时间内(即发射天线工作时不断重复‘发射信号-静默’这一过程)，该共振信号会被所述接收天线接收到，经过控制装置对共振信号的分析后判断声磁传感器被检测到而触发报警。发射天线与接收天线可以由具有信号发射功能与信号接收功能的发射接收天线替代。
目前，声磁防盗系统一般为立式和地埋式的，立式的声磁防盗系统的发射天线与接收天线(或发射接收天线)是竖立在商店的出入口处。而地埋式的声磁防盗系统由于天线是埋设在地面下的，因此，信号是上下传递的且不会占用空间，所以地埋式的声磁防盗系统优点更好，因此越来越受市场的欢迎。
但是，无论是地埋式声磁防盗系统还是立式声磁防盗系统，均容易受到电磁干扰源的电磁干扰(电磁干扰可以表现为天线发出的电磁波信号被电磁干扰源反射回而被接收到，从而引起误报警；或者表现为电磁干扰源发出与天线工作频率一致的电磁信号并被天线接收到，从而引起误报警)，从而会影响到声磁防盗系统的正常工作。
为了避免电磁干扰源的电磁干扰，现有的做法除了严格选取发射天线的安装位置以避开电磁干扰源外，在一些不得已的情况下(例如商场已没有合理的安装位置)，还可以采用降低发射天线的发射灵敏度或接收天线的接收灵敏度的做法，但是这样会使得声磁防盗系统对声磁软标签的探测距离大大降低(一般降到50cm以下)，从而大大限制了声磁防盗系统对于声磁软标签的配套使用。而对于磁棒线圈硬标签正常使用，影响则相对不大。
例如，对于立式声磁防盗系统而言，当立式声磁防盗系统的发射天线靠近金属物(例如金属柜台、金属货架或墙体内的钢筋等)时，或立式声磁防盗系统的接收天线靠近不断发出电磁干扰信号的电磁干扰源时，采取降低发射天线的发射灵敏度或接收天线的接收灵敏度的做法，会使得立式声磁防盗系统的有效防盗通道的宽度为50cm以内，这样该有效防盗通道只能同时通过一个人，不利于人流量较大的商场使用，从而大大限制了声磁软标签的使用。而对于地埋式声磁防盗系统而言，由于其发射天线安装于地面下，因此发射天线会靠近地面下的很多钢筋，而采取降低发射天线的发射灵敏度或接收天线的接收灵敏度的做法，会使得地埋式声磁防盗系统的有效防盗高度为50cm以内，而世界上大多数人的腰部高度在1.2左右，且大部分的手提货物高度略低于腰部高度(一般在50cm以上)，因此使得地埋式防盗系统对于声磁软标签来说几乎无法正常使用。
发明内容
针对上述问题，本发明的目的在于提供一种声磁防盗系统及其天线结构，即使靠近电磁干扰源也无需降低天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
为了实现上述目的，一方面，本发明一实施例提供了一种声磁防盗系统的天线结构，其包括：天线本体以及由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层；
所述天线本体，具有用于向声磁传感器发出电磁波信号和/或接收所述声磁传感器发出的电磁波信号的第一表面，并具有用于朝向电磁干扰源的第二表面；所述第一表面与所述第二表面位于所述天线本体的不同侧；
所述天线本体的所述第二表面上设有所述吸波层；
其中，所述第一频率范围，与所述天线本体的工作频率范围相一致，并与所述电磁干扰源的电磁干扰频率范围相一致。
另一方面，本发明另一实施例提供了一种声磁防盗系统，包括上述任一项所述的天线结构。
相比于现有技术，本发明实施例提供的所述声磁防盗系统及其天线结构，通过在所述天线本体的用于朝向电磁干扰源的第二表面上设有所述吸波层，这样所述吸波层会吸收所述天线本体发送向所述电磁干扰源的电磁波信号，避免了：由所述天线本体发送到所述电磁干扰源的电磁波信号，再反射回来而干扰到所述声磁防盗系统的天线的正常工作；或者，所述吸波层会吸收所述电磁干扰源向所述天线本体发出的电磁波信号，避免其影响到所述天线本体的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源也能正常工作，而无需降低声磁防盗系统的天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
又一方面的，本发明另一实施例提供了一种声磁防盗系统的天线本体，其包括：天线本体及一由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层；
所述天线本体，具有用于向声磁传感器发出电磁波信号和/或接收所述声磁传感器发出的电磁波信号的第一表面，并具有用于朝向至少一电磁干扰源的第二表面；所述第一表面与所述第二表面位于所述天线本体的不同侧；
所述吸波层，用于设于所述第二表面与所述至少一电磁干扰源之间；
其中，所述第一频率范围，与所述天线本体的工作频率范围相一致，并与所述至少一电磁干扰源的电磁干扰频率范围相一致。
相比于现有技术，本发明实施例提供的所述声磁防盗系统，通过在所述电磁干扰源与所述天线本体的所述第二表面之间设有所述吸波层，这样所述吸波层会吸收所述天线本体发送向所述电磁干扰源的电磁波信号，避免了：由所述天线本体发送到所述电磁干扰源的电磁波信号，再反射回来而干扰到所述声磁防盗系统的天线的正常工作；或者，所述吸波层会吸收所述电磁干扰源向所述天线本体发出的电磁波信号，避免其影响到所述天线本体的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源也能正常工作，而无需降低声磁防盗系统的天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
又一方面的，本发明另一实施例提供了一种声磁防盗系统的天线本体，其包括：天线本体及至少两个由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层；
所述天线本体，具有用于向声磁传感器发出电磁波信号和/或接收所述声磁传感器发出的电磁波信号的第 一表面，并具有用于一一对应朝向至少两个电磁干扰源的至少两个第二表面；至少两个所述第二表面与所述第一表面位于所述天线本体的不同侧；
至少两个所述吸波层，用于一一对应地设于至少两个所述第二表面与至少两个所述电磁干扰源之间，并用于一一对应地朝向至少两个所述第二表面或覆盖至少两个所述电磁干扰源；
其中，所述第一频率范围，与所述天线本体的工作频率范围相一致，并与至少两个所述电磁干扰源的电磁干扰频率范围相一致。
相比于现有技术，本发明实施例提供的所述声磁防盗系统，通过在每一所述电磁干扰源与所述天线本体的每一所述第二表面之间设有对应的所述吸波层，且所述吸波层朝向对应的所述第二表面或覆盖对应的所述电磁干扰源，这样所述吸波层会吸收所述天线本体发送向所述电磁干扰源的电磁波信号，避免了：由所述天线本体发送到所述电磁干扰源的电磁波信号，再反射回来而干扰到所述声磁防盗系统的天线的正常工作；或者，所述吸波层会吸收所述电磁干扰源向所述天线本体发出的电磁波信号，避免其影响到所述天线本体的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源也能正常工作，而无需降低声磁防盗系统的天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
附图说明
为了更清楚地说明本发明的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明一实施例提供的第一种声磁防盗系统的结构示意图；
图2是本发明一实施例提供的第二种声磁防盗系统的结构示意图；
图3是本发明一实施例提供的第三种声磁防盗系统的结构示意图；
图4是本发明一实施例提供的第四种声磁防盗系统的结构示意图；
图5是图1～4中的声磁防盗系统的天线结构的其中一种结构示意图；
图6是图1～4中的声磁防盗系统的天线本体的其中一种安装示意图；
图7是本发明一实施例提供的第五种声磁防盗系统的结构示意图；
图8是本发明一实施例提供的第六种声磁防盗系统的结构示意图；
图9是本发明一实施例提供的第七种声磁防盗系统的结构示意图；
图10是本发明一实施例提供的第八种声磁防盗系统的结构示意图；
图11是图7～10中的声磁防盗系统的天线本体的安装示意图；
图12是本发明一实施例提供的第九种声磁防盗系统的结构示意图；
图13是本发明一实施例提供的第十种声磁防盗系统的结构示意图；
图14是本发明一实施例提供的第十一种声磁防盗系统的结构示意图；
图15是本发明一实施例提供的第十二种声磁防盗系统的结构示意图；
图16是图12～15中的声磁防盗系统的天线本体的其中一种安装示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明实施例的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、“前”、“后”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明实施例，而不是指示或暗示所指的装置或部件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明实施例的限制。需要说明的是，“和/或”表示的是可以是“和”与“或”两种并列情况中的其中一种。
此外，在说明书和权利要求书中的术语第一、第二、第三等仅用于区别相同技术特征的描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量，也不一定描述次序或时间顺序。在合适的情况下术语是可以互换的。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。
目前，电磁干扰源对声磁防盗系统的天线的电磁干扰(电磁干扰频率范围与天线的工作频率范围相一致)主要有以下几种方式：
1.声磁防盗系统的发射天线发出的电磁波信号到达电磁干扰源后，被反射回来而被声磁防盗系统的接收天线接收到；
2.声磁防盗系统的发射接收天线(即具有信号发射能力与接收能力的天线)发出的电磁波信号到达电磁干扰源后，被反射回来而被发射接收天线接收到；
3.电磁干扰源发出电磁波干扰信号被声磁防盗系统的接收天线接收到；
4.电磁干扰源发出电磁波干扰信号被声磁防盗系统的发射接收天线接收到。
可以理解的是，电磁干扰源对声磁防盗系统的天线的电磁干扰并不局限于上述几种方式，还可以为其他方式，在此不再一一展开说明。
与上述电磁干扰方式对应的，在此提供以下几种实施例：
实施例一：
参见图1，本发明实施例提供了一种声磁防盗系统，其包括：用于发射电磁波信号的天线结构、接收天线、用于驱动所述天线结构发射电磁波信号的发射电路5、用于驱动所述接收天线接收电磁波信号的接收电路6、控制装置7及报警装置8。
其中，所述天线结构包括：天线本体1以及由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层2；所述天线本体1(为发射天线)，具有用于向声磁传感器发出电磁波信号的第一表面10，并具有用于朝向电磁干扰源3的第二表面11；所述第一表面10与所述第二表面11位于所述天线本体1的不同侧；所述天线本体1的所述第二表面11上设有所述吸波层2。此外，所述第一频率范围与所述天线本体1的工作频率范围相一致；所述电磁干扰源3具有反射所述第一频率范围的电磁波信号的能力。这样，当所述声磁防盗系统安装好后，所述天线本体1的第二表面11发送向所述电磁干扰源3的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在所述天线本体1的用于朝向电磁干扰源3的第二表面11上设有所述吸波层2，这样所述吸波层2会吸收所述天线本体1发送向所述电磁干扰源3的电磁波信号，避免了：由所述天线本体1发送到所述电磁干扰源3的电磁波信号，再反射回来而干扰到所述接收天线的正常工作。由此可见，本发明实 施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的发射天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射天线和/或接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
具体地，所述天线本体1与所述接收天线相对且间隔设置，且两者均竖立设置，即所述声磁防盗系统为立式声磁防盗系统，而所述电磁干扰源3可以为金属柜台、金属货架或墙体内的钢筋等。又或者，所述天线本体1与所述接收天线还可以埋设于地面的安装坑位内、墙体的安装坑位内或者天花板上的中空区域内等隐蔽式的地方，即，所述声磁防盗系统为隐蔽式声磁防盗系统。其中，参见图6，当所述天线本体1与所述接收天线埋设于地面的安装坑位内时，所述声磁防盗系统为地埋式声磁防盗系统，所述电磁干扰源3可以为安装坑位周围的钢筋。当所述天线本体1与所述接收天线埋设于墙体的安装坑位内时，所述电磁干扰源3可以为安装坑位周围的钢筋。
此外，需要说明的是，所述电磁干扰源3的数量可以为一个或一个以上，则对应地，所述第二表面11的数量可以为一个或一个以上，例如，所述天线本体1的顶面为所述第一表面10，当所述电磁干扰源3集中分布于所述天线本体1的底面下时，则所述天线本体1的底面为所述第二表面11。当所述电磁干扰源3分散于所述天线本体1的底面、左侧面及右侧面的外侧时，则所述天线本体1的底面、左侧面及右侧面均可以为所述第二表面11。
可以理解的是，最佳地，所述吸波层2应覆盖所述第二表面11，以确保所述天线本体1的第二表面11发送向所述电磁干扰源3的电磁波信号，会被所述吸波层2完全吸收。当然，所述吸波层2的面积可以略小于所述第二表面11的面积，只要确保所述天线本体1的第二表面11发出的电磁波信号没有大量到达所述电磁干扰源3即可。
在本实施例中，优选地，参见图5，所述天线结构还包括固定装置；所述吸波层2通过所述固定装置固定于所述天线本体1的所述第二表面11上，这样可以将所述吸波层2牢靠地固定在所述天线本体1上，使得整个天线结构一体化，有利于对所述声磁防盗系统的安装。当然，所述吸波层2还可以通过粘贴或焊接等固定方式固定在天线本体1的所述第二表面11上。
示例性地，参见图5，所述固定装置包括固定框4；所述固定框4的顶面凹陷有安装槽，所述吸波层2铺设于所述安装槽内的底部，所述天线本体1固定于所述安装槽内且位于所述吸波层2的顶部上，且所述天线本体1的所述第二表面11朝向所述吸波层2。可以理解的是，所述固定装置还可以包括紧固件或者是卡接结构等，在此不做具体限定。
在上述实施例中，较佳地，所述吸波层2为由磁导率μ≥2亨利/米的吸波材料制成的吸波层，以使得所述吸波层2具有良好的电磁波信号的吸收能力。其中，所述吸波材料为Fe粉与绝缘材料、Fe-Si粉与绝缘材料、Fe-Si-Al粉与绝缘材料或Fe-Ni粉与绝缘材料制成的复合材料，或所述吸波材料为铁氧体材料。
在上述实施例中，较佳地，所述吸波层2为块状结构、片状结构或弧面状结构等，在此不做具体限定。
在上述实施例中，具体地，所述第一频率范围为20-200khz，优选为58khz。
实施例二：
参见图2，本发明实施例提供了一种声磁防盗系统，其包括：用于发射和接收电磁波信号的天线结构、用 于驱动所述天线结构发射电磁波信号的发射电路5、用于驱动所述天线结构接收电磁波信号的接收电路6、控制装置7及报警装置8。
其中，所述天线结构包括天线本体1以及由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层2；所述天线本体1(为发射接收天线)，具有用于向声磁传感器发出电磁波信号的第一表面10，并具有用于朝向电磁干扰源3的第二表面11；所述第一表面10与所述第二表面11位于所述天线本体1的不同侧；所述天线本体1的所述第二表面11上设有所述吸波层2。此外，所述第一频率范围与所述天线本体1的工作频率范围相一致；所述电磁干扰源3具有反射所述第一频率范围的电磁波信号的能力。这样，当所述声磁防盗系统安装好后，所述天线本体1的第二表面11发送向所述电磁干扰源3的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在所述天线本体1的用于朝向电磁干扰源3的第二表面11上设有所述吸波层2，这样所述吸波层2会吸收所述天线本体1发送向所述电磁干扰源3的电磁波信号，避免了：由所述天线本体1发送到所述电磁干扰源3的电磁波信号，再反射回来而干扰到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例一中的相关描述，在此不再重复赘述。
实施例三：
参见图3，本发明实施例提供了一种声磁防盗系统，其包括：用于发射和接收电磁波信号的天线结构、用于驱动所述天线结构发射电磁波信号的发射电路5、用于驱动所述天线结构接收电磁波信号的接收电路6、控制装置7及报警装置8。
其中，所述天线结构包括天线本体1以及由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层2；所述天线本体1(为发射接收天线)，具有用于接收所述声磁传感器发出的电磁波信号的第一表面10，并具有用于朝向电磁干扰源3的第二表面11；所述第一表面10与所述第二表面11位于所述天线本体1的不同侧；所述天线本体1的所述第二表面11上设有所述吸波层2。此外，所述第一频率范围与所述天线本体1的工作频率范围相一致；所述电磁干扰源3具有反射所述第一频率范围的电磁波信号的能力。这样，当所述声磁防盗系统安装好后，所述电磁干扰源3发送向所述天线本体1的第二表面11的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在所述天线本体1的用于朝向电磁干扰源3的第二表面11上设有所述吸波层2，这样所述吸波层2会吸收所述电磁干扰源3向所述天线本体1发出的电磁波信号，避免其影响到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例一中的相关描述，在此不再重复赘述。
实施例四：
参见图4，本发明实施例提供了一种声磁防盗系统，其包括：用于接收电磁波信号的天线结构、发射天线9、用于驱动所述发射天线9发射电磁波信号的发射电路5、用于驱动所述天线结构接收电磁波信号的接收电路6、控制装置7及报警装置8。
其中，所述天线结构包括天线本体1以及由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层2；所述天线本体1(为接收天线)，具有用于接收声磁传感器发出的电磁波信号的第一表面10，并具有用于朝向电磁干扰源3的第二表面11；所述第一表面10与所述第二表面11位于所述天线本体1的不同侧；所述天线本体1的所述第二表面11上设有所述吸波层2。此外，所述第一频率范围与所述天线本体1的工作频率范围相一致；所述电磁干扰源3具有发出所述第一频率范围的电磁波信号的能力。这样，当所述声磁防盗系统安装好后，所述电磁干扰源3发送向所述天线本体1的第二表面11的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在所述天线本体1的用于朝向电磁干扰源3的第二表面11上设有所述吸波层2，这样所述吸波层2会吸收所述电磁干扰源3向所述天线本体1发出的电磁波信号，避免其影响到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例一中的相关描述，在此不再重复赘述。
实施例五：
参见图7，本发明实施例提供了一种声磁防盗系统，其包括：用于发射电磁波信号的天线本体1、接收天线4、用于驱动所述天线本体1发射电磁波信号的发射电路5、用于驱动所述接收天线4接收电磁波信号的接收电路6、控制装置7、报警装置8及一个吸波层2。
其中，所述天线本体1(为发射天线)，具有用于向声磁传感器发出电磁波信号的第一表面10，并具有用于朝向至少一电磁干扰源3的第二表面11；所述第一表面10与所述第二表面11位于所述天线本体1的不同侧；所述吸波层2，其由吸波材料制成，用于吸收第一频率范围的电磁波信号，用于设于所述第二表面11与所述至少一电磁干扰源3之间。此外，所述第一频率范围与所述天线本体1的工作频率范围相一致；所述至少一电磁干扰源3具有反射为所述第一频率范围的电磁波信号的能力。这样，当所述声磁防盗系统安装好后，所述天线本体1的第二表面11发送向所述至少一电磁干扰源3的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在所述电磁干扰源3与所述天线本体1的所述第二表面11之间设有所述吸波层2，这样所述吸波层2会吸收所述天线本体1发送向所述电磁干扰源3的电磁波信号，避免了：由所述天线本体1发送到所述电磁干扰源3的电磁波信号，再反射回来而干扰到所述接收天线4的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的发射天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射天线和/或接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
具体地，所述天线本体1与所述接收天线相对且间隔设置，且两者均竖立设置，即所述声磁防盗系统为立式声磁防盗系统，而所述电磁干扰源3可以为金属柜台、金属货架或墙体内的钢筋等。又或者，所述天线本体 1与所述接收天线还可以埋设于地面的安装坑位内、墙体的安装坑位内或者天花板上的中空区域内等隐蔽式的地方，即，所述声磁防盗系统为隐蔽式声磁防盗系统。其中，当所述天线本体1与所述接收天线埋设于地面的安装坑位内时，所述声磁防盗系统为地埋式声磁防盗系统，所述电磁干扰源3可以为安装坑位周围的钢筋。当所述天线本体1与所述接收天线埋设于墙体的安装坑位内时，所述电磁干扰源3可以为安装坑位周围的钢筋。
示例性地，参见图11，当所述隐蔽式声磁防盗系统优选为地埋式声磁防盗系统时，所述天线本体1用于设于安装坑位内，所述安装坑位内设有所述至少一电磁干扰源3(例如地面下的钢筋)，所述吸波层2用于铺设于所述安装坑位内以覆盖所述至少一电磁干扰源3。
此外，需要说明的是，所述电磁干扰源3的数量可以为一个或一个以上，则对应地，所述第二表面11的数量可以为一个或一个以上，例如，所述天线本体1的顶面为所述第一表面10，当所述电磁干扰源3集中分布于所述天线本体1的底面下时，则所述天线本体1的底面为所述第二表面11。当所述电磁干扰源3分散于所述天线本体1的底面、左侧面及右侧面的外侧时，则所述天线本体1的底面、左侧面及右侧面均可以为所述第二表面11。
优选地，所述吸波层2与所述第二表面11及电磁干扰源3这两者的设置位置关系具体可以为：所述吸波层2还用于朝向并靠近所述第二表面11或覆盖所述至少一电磁干扰源3。
可以理解的是，当所述吸波层2用于朝向所述天线本体1的所述第二表面11并与其间隔设置时，最佳地，所述吸波层2可以尽可能靠近所述天线本体1的所述第二表面11，且所述吸波层2的长宽尺寸，大于或等于所述天线本体1的所述第二表面11的长宽尺寸，以确保所述天线本体1的第二表面11发送向所述电磁干扰源3的电磁波信号，会被所述吸波层2完全吸收。当然，所述吸波层2的长宽尺寸可以略小于所述第二表面11的长宽尺寸，只要确保所述天线本体1的第二表面11发出的电磁波信号没有大量到达所述电磁干扰源3即可。
另，需要指出的是，所述吸波层2覆盖所述至少一电磁干扰源3的形式可以为：部分覆盖所述至少一电磁干扰源3(即，将各个电磁干扰源3的朝向所述天线本体的表面覆盖住)，也可以为：全部覆盖所述至少一电磁干扰源3(即将所述一电磁干扰源3包裹起来)。
在上述实施例中，较佳地，所述吸波层2为由磁导率μ≥2亨利/米的吸波材料制成的吸波层，以使得所述吸波层2具有良好的电磁波信号的吸收能力。其中，所述吸波材料为Fe粉与绝缘材料、Fe-Si粉与绝缘材料、Fe-Si-Al粉与绝缘材料或Fe-Ni粉与绝缘材料制成的复合材料，或所述吸波材料为铁氧体材料。
在上述实施例中，较佳地，所述吸波层2为块状结构、片状结构或弧面状结构等，在此不做具体限定。
在上述实施例中，具体地，所述第一频率范围为20-200khz，优选为58khz。
实施例六：
参见图8，本发明实施例提供了一种声磁防盗系统，其包括：用于发射和接收电磁波信号的天线本体1、用于驱动所述天线本体1发射电磁波信号的发射电路5、用于驱动所述天线本体1接收电磁波信号的接收电路6、控制装置7、报警装置8及一个吸波层2。
其中，所述天线本体1(为发射接收天线)，具有用于向声磁传感器发出电磁波信号的第一表面10，并具有用于朝向至少一电磁干扰源3的第二表面11；所述第一表面10与所述第二表面11位于所述天线本体1的不同侧；所述吸波层2，用于设于所述第二表面11与所述至少一电磁干扰源3之间。此外，所述第一频率范围与所述天线本体1的工作频率范围相一致；所述至少一电磁干扰源3具有反射为所述第一频率范围的电磁波 信号的能力。这样，当所述声磁防盗系统安装好后，所述天线本体1的第二表面11发送向所述至少一电磁干扰源3的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在所述电磁干扰源3与所述天线本体1的所述第二表面11之间设有所述吸波层2，这样所述吸波层2会吸收所述天线本体1发送向所述电磁干扰源3的电磁波信号，避免了：由所述天线本体1发送到所述电磁干扰源3的电磁波信号，再反射回来而干扰到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例五中的相关描述，在此不再重复赘述。
实施例七：
参见图9，本发明实施例提供了一种声磁防盗系统，其包括：用于发射和接收电磁波信号的天线本体1、用于驱动所述天线本体1发射电磁波信号的发射电路5、用于驱动所述天线本体1接收电磁波信号的接收电路6、控制装置7、报警装置8及一个吸波层2。
其中，所述天线本体1(为发射接收天线)，具有用于接收所述声磁传感器发出的电磁波信号的第一表面10，并具有用于朝向至少一电磁干扰源3的第二表面11；所述第一表面10与所述第二表面11位于所述天线本体1的不同侧；所述吸波层2，用于设于所述第二表面11与所述至少一电磁干扰源3之间。此外，所述第一频率范围与所述天线本体1的工作频率范围相一致；所述至少一电磁干扰源3具有发出为所述第一频率范围的电磁波信号的能力。这样，当所述声磁防盗系统安装好后，所述至少一电磁干扰源3发送向所述天线本体1的第二表面11的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在所述电磁干扰源3与所述天线本体1的所述第二表面11之间设有所述吸波层2，这样所述吸波层2会吸收所述电磁干扰源3向所述天线本体1发出的电磁波信号，避免其影响到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例五中的相关描述，在此不再重复赘述。
实施例八：
参见图10，本发明实施例提供了一种声磁防盗系统，其包括：用于接收电磁波信号的天线本体1、发射天线9、用于驱动所述发射天线9发射电磁波信号的发射电路5、用于驱动所述天线本体1接收电磁波信号的接收电路6、控制装置7、报警装置8及一个吸波层2。
其中，所述天线本体1(为接收天线)，具有用于接收声磁传感器发出的电磁波信号的第一表面10，并具有用于朝向至少一电磁干扰源3的第二表面11；所述第一表面10与所述第二表面11位于所述天线本体1的不同侧；所述吸波层2，用于设于所述第二表面11与所述至少一电磁干扰源3之间。此外，所述第一频率范 围与所述天线本体1的工作频率范围相一致；所述至少一电磁干扰源3具有发出为所述第一频率范围的电磁波信号的能力。这样，当所述声磁防盗系统安装好后，所述至少一电磁干扰源3发送向所述天线本体1的第二表面11的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在所述电磁干扰源3与所述天线本体1的所述第二表面11之间设有所述吸波层2，这样所述吸波层2会吸收所述电磁干扰源3向所述天线本体1发出的电磁波信号，避免其影响到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例五中的相关描述，在此不再重复赘述。
实施例九：
参见图12，本发明实施例提供了一种抗电磁干扰的声磁防盗系统，其包括：用于发射电磁波信号的天线本体1、接收天线4、用于驱动所述天线本体1发射电磁波信号的发射电路5、用于驱动所述接收天线4接收电磁波信号的接收电路6、报警装置8以及至少两个吸波层2。
其中，所述天线本体1(为发射天线)，具有用于向声磁传感器发出电磁波信号的第一表面10，并具有用于一一对应朝向至少两个电磁干扰源3的至少两个第二表面11；至少两个所述第二表面11与所述第一表面10位于所述天线本体1的不同侧；至少两个所述吸波层2，由吸波材料制成，其用于吸收第一频率范围的电磁波信号，用于一一对应地设于至少两个所述第二表面11与至少两个所述电磁干扰源3之间，并用于一一对应地朝向至少两个所述第二表面11或覆盖至少两个所述电磁干扰源3。至少两个所述电磁干扰源3具有反射为所述第一频率范围的电磁波信号的能力。此外，所述第一频率范围，与所述天线本体1的工作频率范围相一致，并与至少两个所述电磁干扰源3的电磁干扰频率范围相一致。这样，当所述声磁防盗系统安装好后，所述天线本体1的第二表面11发送向所述电磁干扰源3的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在每一所述电磁干扰源3与所述天线本体1的每一所述第二表面11之间设有对应的所述吸波层2，且所述吸波层2朝向对应的所述第二表面11或覆盖对应的所述电磁干扰源3，这样所述吸波层2会吸收所述天线本体1发送向所述电磁干扰源3的电磁波信号，避免了：由所述天线本体1发送到所述电磁干扰源3的电磁波信号，再反射回来而干扰到所述接收天线4的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的发射天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射天线和/或接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
具体地，所述天线本体1与所述接收天线相对且间隔设置，且两者均竖立设置，即所述声磁防盗系统为立式声磁防盗系统，而所述电磁干扰源3可以为金属柜台、金属货架或墙体内的钢筋等。又或者，所述天线本体1与所述接收天线还可以埋设于地面的安装坑位内、墙体的安装坑位内或者天花板上的中空区域内等隐蔽式的地方，即，所述声磁防盗系统为隐蔽式声磁防盗系统。其中，当所述天线本体1与所述接收天线埋设于地面的安装坑位内时，所述声磁防盗系统为地埋式声磁防盗系统，所述电磁干扰源3可以为安装坑位周围的钢筋。当 所述天线本体1与所述接收天线埋设于墙体的安装坑位内时，所述电磁干扰源3可以为安装坑位周围的钢筋。
示例性地，参见图16，当所述隐蔽式声磁防盗系统优选为地埋式声磁防盗系统时，所述天线本体1安装于安装坑位内，安装坑位内的周侧设有至少两个所述电磁干扰源3(例如地面下的钢筋)；至少两个所述吸波层2设于安装坑位内，且一一对应地覆盖至少两个所述电磁干扰源3。相比于用一整块吸波层2来隔绝至少两个所述电磁干扰源3对天线的电磁干扰，本实施例只需要在至少两个所述电磁干扰源3的位置对应覆盖一小块所述吸波层2即可，从而降低了吸波层2的使用面积及材料成本。
此外，需要说明的是，至少两个所述第二表面11可以位于所述天线本体1的同一侧或不同侧。当至少两个所述第二表面11位于所述天线本体1的同一侧时，则该侧面可以看做一个受电磁干扰的整体的大表面。例如，所述天线本体1的顶面为所述第一表面10，当多个所述电磁干扰源3集中分布于所述天线本体1的底面下时，则所述天线本体1的底面的对应朝向多个所述电磁干扰源3的多个局部区域，均可以看做为一个个所述第二表面11。当所述电磁干扰源3分散于所述天线本体1的底面、左侧面及右侧面的外侧时，则所述天线本体1的底面、左侧面及右侧面均可以看做为所述第二表面11。
可以理解的是，当所述吸波层2用于朝向所述天线本体1的所述第二表面11并与其间隔设置时，最佳地，所述吸波层2可以尽可能靠近所述天线本体1的所述第二表面11，且所述吸波层2的长宽尺寸，大于或等于所述天线本体1的所述第二表面11的长宽尺寸，以确保所述天线本体1的第二表面11发送向所述电磁干扰源3的电磁波信号，会被所述吸波层2完全吸收。当然，所述吸波层2的长宽尺寸可以略小于所述第二表面11的长宽尺寸，只要确保所述天线本体1的第二表面11发出的电磁波信号没有大量到达所述电磁干扰源3即可。
在上述实施例中，较佳地，所述吸波层2为由磁导率μ≥2亨利/米的吸波材料制成的吸波层，以使得所述吸波层2具有良好的电磁波信号的吸收能力。其中，所述吸波材料为Fe粉与绝缘材料、Fe-Si粉与绝缘材料、Fe-Si-Al粉与绝缘材料或Fe-Ni粉与绝缘材料制成的复合材料，或所述吸波材料为铁氧体材料。
在上述实施例中，较佳地，所述吸波层2为块状结构、片状结构或弧面状结构等，在此不做具体限定。
在上述实施例中，具体地，所述第一频率范围为20-200khz，优选为58khz。
实施例十：
参见图13，本发明实施例提供了一种抗电磁干扰的声磁防盗系统，其包括：用于发射和接收电磁波信号的天线本体1、用于驱动所述天线本体1发射电磁波信号的发射电路5、用于驱动所述天线本体1接收电磁波信号的接收电路6、控制装置7、报警装置8以及至少两个吸波层2。
其中，所述天线本体1(为发射接收天线)，具有用于向声磁传感器发出电磁波信号的第一表面10，并具有用于一一对应朝向至少两个电磁干扰源3的至少两个第二表面11；至少两个所述第二表面11与所述第一表面10位于所述天线本体1的不同侧；至少两个所述吸波层2，由吸波材料制成，其用于吸收第一频率范围的电磁波信号，用于一一对应地设于至少两个所述第二表面11与至少两个所述电磁干扰源3之间，并用于一一对应地朝向至少两个所述第二表面11或覆盖至少两个所述电磁干扰源3。至少两个所述电磁干扰源3具有反射为所述第一频率范围的电磁波信号的能力。此外，所述第一频率范围，与所述天线本体1的工作频率范围相一致，并与至少两个所述电磁干扰源3的电磁干扰频率范围相一致。这样，当所述声磁防盗系统安装好后，所述天线本体1的第二表面11发送向所述电磁干扰源3的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在每一所述电磁干扰源3与所述天线本体1的每一所述第二表面11之间设有对应的 所述吸波层2，且所述吸波层2朝向对应的所述第二表面11或覆盖对应的所述电磁干扰源3，这样所述吸波层2会吸收所述天线本体1发送向所述电磁干扰源3的电磁波信号，避免了：由所述天线本体1发送到所述电磁干扰源3的电磁波信号，再反射回来而干扰到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例九中的相关描述，在此不再重复赘述。
实施例十一：
参见图14，本发明实施例提供了一种抗电磁干扰的声磁防盗系统，其包括：用于发射和接收电磁波信号的天线本体1、用于驱动所述天线本体1发射电磁波信号的发射电路5、用于驱动所述天线本体1接收电磁波信号的接收电路6、控制装置7、报警装置8以及至少两个吸波层2。
其中，所述天线本体1(为发射接收天线)，具有用于接收所述声磁传感器发出的电磁波信号的第一表面10，并具有用于一一对应朝向至少两个电磁干扰源3的至少两个第二表面11；至少两个所述第二表面11与所述第一表面10位于所述天线本体1的不同侧；至少两个所述吸波层2，由吸波材料制成，其用于吸收第一频率范围的电磁波信号，用于一一对应地设于至少两个所述第二表面11与至少两个所述电磁干扰源3之间，并用于一一对应地朝向至少两个所述第二表面11或覆盖至少两个所述电磁干扰源3。至少两个所述电磁干扰源3具有发出为所述第一频率范围的电磁波信号的能力。此外，所述第一频率范围，与所述天线本体1的工作频率范围相一致，并与至少两个所述电磁干扰源3的电磁干扰频率范围相一致。这样，当所述声磁防盗系统安装好后，所述电磁干扰源3发送向所述天线本体1的第二表面11的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在每一所述电磁干扰源3与所述天线本体1的每一所述第二表面11之间设有对应的所述吸波层2，且所述吸波层2朝向对应的所述第二表面11或覆盖对应的所述电磁干扰源3，这样所述吸波层2会吸收所述电磁干扰源3向所述天线本体1发出的电磁波信号，避免其影响到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例九中的相关描述，在此不再重复赘述。
实施例十二：
参见图15，本发明实施例提供了一种声磁防盗系统，其包括：用于接收电磁波信号的天线本体1、发射天线、用于驱动所述发射天线发射电磁波信号的发射电路5、用于驱动所述天线本体1接收电磁波信号的接收电路6、控制装置7、报警装置8以及至少两个吸波层2。
其中，所述天线本体1(为接收天线)，具有用于接收声磁传感器发出的电磁波信号的第一表面10，并具有用于一一对应朝向至少两个电磁干扰源3的至少两个第二表面11；至少两个所述第二表面11与所述第一表 面10位于所述天线本体1的不同侧；至少两个所述吸波层2，由吸波材料制成，其用于吸收第一频率范围的电磁波信号，用于一一对应地设于至少两个所述第二表面11与至少两个所述电磁干扰源3之间，并用于一一对应地朝向至少两个所述第二表面11或覆盖至少两个所述电磁干扰源3。至少两个所述电磁干扰源3具有发出为所述第一频率范围的电磁波信号的能力。此外，所述第一频率范围，与所述天线本体1的工作频率范围相一致，并与至少两个所述电磁干扰源3的电磁干扰频率范围相一致。这样，当所述声磁防盗系统安装好后，所述电磁干扰源3发送向所述天线本体1的第二表面11的电磁波信号，会被所述吸波层2吸收。
在本实施例中，通过在每一所述电磁干扰源3与所述天线本体1的每一所述第二表面11之间设有对应的所述吸波层2，且所述吸波层2朝向对应的所述第二表面11或覆盖对应的所述电磁干扰源3，这样所述吸波层2会吸收所述电磁干扰源3向所述天线本体1发出的电磁波信号，避免其影响到所述天线本体1的正常工作。由此可见，本发明实施例能够提高声磁防盗系统的天线的电磁抗干扰能力，使得声磁防盗系统的天线即使靠近电磁干扰源3也能正常工作，而无需降低声磁防盗系统的发射接收天线的灵敏度，确保了声磁防盗系统对声磁软标签的探测距离不会大幅降低，从而有利于声磁防盗系统对于声磁软标签的配套使用。
需要说明的是，本实施例的所述声磁防盗系统的各方面内容可以对应参考实施例九中的相关描述，在此不再重复赘述。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本领域技术的技术人员在本发明公开的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (28)

  1. 一种声磁防盗系统的天线结构，其特征在于，包括：天线本体以及由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层；
    所述天线本体，具有用于向声磁传感器发出电磁波信号和/或接收所述声磁传感器发出的电磁波信号的第一表面，并具有用于朝向电磁干扰源的第二表面；所述第一表面与所述第二表面位于所述天线本体的不同侧；
    所述天线本体的所述第二表面上设有所述吸波层；
    其中，所述第一频率范围，与所述天线本体的工作频率范围相一致，并与所述电磁干扰源的电磁干扰频率范围相一致。
  2. 根据权利要求1所述的声磁防盗系统的天线结构，其特征在于，所述电磁干扰源具有反射为所述第一频率范围的电磁波信号的能力，则所述天线本体为发射天线或发射接收天线；
    或，所述电磁干扰源具有发出为所述第一频率范围的电磁波信号的能力，则所述天线本体为接收天线或发射接收天线。
  3. 根据权利要求1所述的声磁防盗系统的天线结构，其特征在于，还包括固定装置；所述吸波层通过所述固定装置固定于所述天线本体的所述第二表面上。
  4. 根据权利要求3所述的声磁防盗系统的天线结构，其特征在于，所述固定装置包括固定框；
    所述固定框的顶面凹陷有安装槽，所述吸波层铺设于所述安装槽内的底部，所述天线本体固定于所述安装槽内且位于所述吸波层的顶部上，且所述天线本体的所述第二表面朝向所述吸波层。
  5. 根据权利要求1所述的声磁防盗系统的天线结构，其特征在于，所述吸波层为由磁导率μ≥2亨利/米的吸波材料制成的吸波层；其中，所述吸波材料为Fe粉与绝缘材料、Fe-Si粉与绝缘材料、Fe-Si-Al粉与绝缘材料或Fe-Ni粉与绝缘材料制成的复合材料，或所述吸波材料为铁氧体材料。
  6. 根据权利要求1所述的声磁防盗系统的天线结构，其特征在于，所述吸波层为块状结构。
  7. 根据权利要求1所述的声磁防盗系统的天线结构，其特征在于，所述第一频率范围为20-200kHz。
  8. 一种声磁防盗系统，其特征在于，包括如权利要求1-7任一项所述的天线结构。
  9. 根据权利要求8所述的声磁防盗系统，其特征在于，所述声磁防盗系统为隐蔽式声磁防盗系统。
  10. 根据权利要求9所述的声磁防盗系统，其特征在于，所述隐蔽式声磁防盗系统为地埋式声磁防盗系统或墙埋式声磁防盗系统。
  11. 一种声磁防盗系统，其特征在于，包括：天线本体及一由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层；
    所述天线本体，具有用于向声磁传感器发出电磁波信号和/或接收所述声磁传感器发出的电磁波信号的第一表面，并具有用于朝向至少一电磁干扰源的第二表面；所述第一表面与所述第二表面位于所述天线本体的不同侧；
    所述吸波层，用于设于所述第二表面与所述至少一电磁干扰源之间；
    其中，所述第一频率范围，与所述天线本体的工作频率范围相一致，并与所述至少一电磁干扰源的电磁干扰频率范围相一致。
  12. 根据权利要求11所述的声磁防盗系统，其特征在于，所述电磁干扰源具有反射为所述第一频率范围的电磁波信号的能力，则所述天线本体为发射天线或发射接收天线；
    或，所述电磁干扰源具有发出为所述第一频率范围的电磁波信号的能力，则所述天线本体为接收天线或发射接收天线。
  13. 根据权利要求11所述的声磁防盗系统，其特征在于，所述吸波层为由磁导率μ≥2亨利/米的吸波材料制成的吸波层；其中，所述吸波材料为Fe粉与绝缘材料、Fe-Si粉与绝缘材料、Fe-Si-Al粉与绝缘材料或Fe-Ni粉与绝缘材料制成的复合材料，或所述吸波材料为铁氧体材料。
  14. 根据权利要求11所述的声磁防盗系统，其特征在于，所述吸波层为块状结构。
  15. 根据权利要求11所述的声磁防盗系统，其特征在于，所述第一频率范围为20-200kHz。
  16. 根据权利要求11所述的声磁防盗系统，其特征在于，所述吸波层还用于朝向并靠近所述第二表面或覆盖所述至少一电磁干扰源。
  17. 根据权利要求16所述的声磁防盗系统，其特征在于，当所述吸波层用于朝向并靠近所述天线本体的所述第二表面时，所述吸波层的长宽尺寸，大于或等于所述天线本体的所述第二表面的长宽尺寸。
  18. 根据权利要求11所述的声磁防盗系统，其特征在于，所述第二表面为至少两个，至少两个所述第二表面位于所述天线本体的不同侧。
  19. 根据权利要求11至18任一项所述的声磁防盗系统，其特征在于，所述声磁防盗系统为隐蔽式声磁防盗系统。
  20. 根据权利要求19所述的声磁防盗系统，其特征在于，所述隐蔽式声磁防盗系统为地埋式声磁防盗系统，所述天线本体用于设于安装坑位内，所述安装坑位内设有所述至少一电磁干扰源，所述吸波层用于铺设于所述安装坑位内以覆盖所述至少一电磁干扰源。
  21. 一种声磁防盗系统，其特征在于，包括：天线本体及至少两个由吸波材料制成且用于吸收第一频率范围的电磁波信号的吸波层；
    所述天线本体，具有用于向声磁传感器发出电磁波信号和/或接收所述声磁传感器发出的电磁波信号的第一表面，并具有用于一一对应朝向至少两个电磁干扰源的至少两个第二表面；至少两个所述第二表面与所述第一表面位于所述天线本体的不同侧；
    至少两个所述吸波层，用于一一对应地设于至少两个所述第二表面与至少两个所述电磁干扰源之间，并用于一一对应地朝向至少两个所述第二表面或覆盖至少两个所述电磁干扰源；
    其中，所述第一频率范围，与所述天线本体的工作频率范围相一致，并与至少两个所述电磁干扰源的电磁 干扰频率范围相一致。
  22. 根据权利要求21所述的声磁防盗系统，其特征在于，至少两个所述电磁干扰源具有反射为所述第一频率范围的电磁波信号的能力，则所述天线本体为发射天线或发射接收天线；
    或，至少两个所述电磁干扰源具有发出为所述第一频率范围的电磁波信号的能力，则所述天线本体为接收天线或发射接收天线。
  23. 根据权利要求21所述的声磁防盗系统，其特征在于，所述吸波层为由磁导率μ≥2亨利/米的吸波材料制成的吸波层；其中，所述吸波材料为Fe粉与绝缘材料、Fe-Si粉与绝缘材料、Fe-Si-Al粉与绝缘材料或Fe-Ni粉与绝缘材料制成的复合材料，或所述吸波材料为铁氧体材料。
  24. 根据权利要求21所述的声磁防盗系统，其特征在于，所述吸波层为块状结构。
  25. 根据权利要求21所述的声磁防盗系统，其特征在于，所述第一频率范围为20-200kHz。
  26. 根据权利要求21所述的声磁防盗系统，其特征在于，至少两个所述第二表面位于所述天线本体的同一侧或不同侧。
  27. 根据权利要求21至26任一项所述的声磁防盗系统，其特征在于，所述声磁防盗系统为隐蔽式声磁防盗系统。
  28. 根据权利要求27所述的声磁防盗系统，其特征在于，所述隐蔽式声磁防盗系统为地埋式声磁防盗系统。
PCT/CN2020/071313 2019-01-16 2020-01-10 声磁防盗系统及其天线结构 WO2020147652A1 (zh)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201910042946.7 2019-01-16
CN201910043103.9A CN109697818A (zh) 2019-01-16 2019-01-16 一种声磁防盗系统
CN201910043101.X 2019-01-16
CN201910043103.9 2019-01-16
CN201910043101.XA CN109686034A (zh) 2019-01-16 2019-01-16 一种抗电磁干扰的声磁防盗系统
CN201910042946.7A CN109686033A (zh) 2019-01-16 2019-01-16 声磁防盗系统及其天线结构

Publications (1)

Publication Number Publication Date
WO2020147652A1 true WO2020147652A1 (zh) 2020-07-23

Family

ID=71613091

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/071313 WO2020147652A1 (zh) 2019-01-16 2020-01-10 声磁防盗系统及其天线结构

Country Status (1)

Country Link
WO (1) WO2020147652A1 (zh)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202548989U (zh) * 2011-12-30 2012-11-21 北京物资学院 物品管理防盗系统
US20140266728A1 (en) * 2013-03-15 2014-09-18 Checkpoint Systems, Inc. Electronic article surveillance portal
CN105976015A (zh) * 2016-07-01 2016-09-28 周燦龍 一种防金属干扰的nfc标签设备
CN205881082U (zh) * 2016-06-17 2017-01-11 上海联百商业设备有限公司 一种地埋式商品防盗系统
CN106645815A (zh) * 2016-12-05 2017-05-10 中国电力科学研究院 一种接收空间电磁波信号的天线
CN109686033A (zh) * 2019-01-16 2019-04-26 广东齐达科技有限公司 声磁防盗系统及其天线结构
CN109686034A (zh) * 2019-01-16 2019-04-26 广州齐达材料科技有限公司 一种抗电磁干扰的声磁防盗系统
CN109697818A (zh) * 2019-01-16 2019-04-30 广州齐达材料科技有限公司 一种声磁防盗系统

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202548989U (zh) * 2011-12-30 2012-11-21 北京物资学院 物品管理防盗系统
US20140266728A1 (en) * 2013-03-15 2014-09-18 Checkpoint Systems, Inc. Electronic article surveillance portal
CN205881082U (zh) * 2016-06-17 2017-01-11 上海联百商业设备有限公司 一种地埋式商品防盗系统
CN105976015A (zh) * 2016-07-01 2016-09-28 周燦龍 一种防金属干扰的nfc标签设备
CN106645815A (zh) * 2016-12-05 2017-05-10 中国电力科学研究院 一种接收空间电磁波信号的天线
CN109686033A (zh) * 2019-01-16 2019-04-26 广东齐达科技有限公司 声磁防盗系统及其天线结构
CN109686034A (zh) * 2019-01-16 2019-04-26 广州齐达材料科技有限公司 一种抗电磁干扰的声磁防盗系统
CN109697818A (zh) * 2019-01-16 2019-04-30 广州齐达材料科技有限公司 一种声磁防盗系统

Similar Documents

Publication Publication Date Title
CA2567453C (en) Wide exit electronic article surveillance antenna system
CA2642623C (en) A wide exit/entrance electronic article surveillance antenna system
CA2963518C (en) Systems and methods for intra-zone detection
EP2543025B1 (en) Method and system for reducing effect of interference in integrated metal detection/electronic article surveillance systems
CN102089792A (zh) 具有金属检测能力的电子商品防盗系统及其方法
KR20170032299A (ko) 알람 문제를 적응 제어하기 위한 시스템들 및 방법들
US6753821B2 (en) Method and arrangement of antenna system of EAS
US10614691B2 (en) Combination media display and electronic article surveillance pedestal
JP5397815B2 (ja) 商品監視システムアンテナおよび方法
WO2020147652A1 (zh) 声磁防盗系统及其天线结构
EP0736850B2 (en) Method for preventing shoplifting and electronic theft detection system
CN209625381U (zh) 声磁防盗系统及其天线结构
CN109697818A (zh) 一种声磁防盗系统
CN209625383U (zh) 一种抗电磁干扰的声磁防盗系统
CN209625384U (zh) 一种声磁防盗系统
CN103401057B (zh) 用于宽出口的电子物品监视天线系统
CN109686033A (zh) 声磁防盗系统及其天线结构
CN109686034A (zh) 一种抗电磁干扰的声磁防盗系统
CN210244567U (zh) 商品声磁防盗系统
EP1489572A1 (en) Wide exit electromic article surveillance antenna system
JPH09212761A (ja) 被監視装置および監視装置
KR200252130Y1 (ko) 도난방지시스템용 표시기
JPH0390470A (ja) 列車検知方法および可搬形列車検知器
CN108288339A (zh) 一种带有多种防盗设备的亚克力电子防盗系统
JPH08222935A (ja) 盗難防止装置用アンテナ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20740990

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20740990

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 06.12.2021)

122 Ep: pct application non-entry in european phase

Ref document number: 20740990

Country of ref document: EP

Kind code of ref document: A1