CN102236091A - Radio frequency signal receiving device and positioning system applying same - Google Patents
Radio frequency signal receiving device and positioning system applying same Download PDFInfo
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- CN102236091A CN102236091A CN2010101774923A CN201010177492A CN102236091A CN 102236091 A CN102236091 A CN 102236091A CN 2010101774923 A CN2010101774923 A CN 2010101774923A CN 201010177492 A CN201010177492 A CN 201010177492A CN 102236091 A CN102236091 A CN 102236091A
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Abstract
The invention discloses a radio frequency signal receiving device and a positioning system applying the same. In the radio frequency signal receiving device, a receiving component is arranged in an electromagnetic wave absorption shell; and a radio frequency signal emitted by a signal source can enter the electromagnetic wave absorption shell only through a notch of the electromagnetic wave absorption shell, so that, the receiving component can receive the radio frequency signal only through the notch, and the receiving angle of the receiving component can be defined through the notch. Therefore, through arrangement of the notch, the radio frequency signal receiving device has the characteristic of directed receiving by a relatively simple structure.
Description
Technical field
The present invention is relevant for the radiofrequency signal receiving trap, particularly a kind of can be at the radiofrequency signal receiving trap of specific receiving angle received RF signal, and use the positioning system of radiofrequency signal receiving trap.
Background technology
Science and technology is maked rapid progress, radio-frequency recognition system (RFID) becomes widely used gradually in recent years radio wave transmissions signalling technique, and the front end basic framework of radio-frequency recognition system is the radio wave transmissions network of being made up of receiving end (Reader) and radio-frequency (RF) tag (RFID Tag).
Real-time positioning system (RTLS, real time locating system) is one of radio-frequency recognition system (RFID) main application fields.Real-time positioning system is by a plurality of radiofrequency signal receiving traps, receive the radiofrequency signal that single radio-frequency (RF) tag sends after, judge the distance between radio-frequency (RF) tag and each the radiofrequency signal receiving trap, again with the position of the common factor judgement radio-frequency (RF) tag of afore-mentioned distance.Aforesaid distance is the strength retrogression by radiofrequency signal, judges the distance between radio-frequency (RF) tag and each the radiofrequency signal receiving trap.Because the characteristic of radiowave itself, be subjected to environmental interference easily, therefore be subject to the material character of landform and surface of contact, general radio-frequency recognition system receiver is difficult to judge accurately the distance between radio-frequency (RF) tag and the radiofrequency signal receiving trap, causes influencing the positioning system accuracy.
Because relatively low between radio-frequency (RF) tag and the radiofrequency signal receiving trap apart from precision, therefore if add radio-frequency (RF) tag with respect to the position angle of radiofrequency signal receiving trap as the judgement parameter, can promote the accuracy of positioning system.But radiofrequency signal can produce effects such as reflection, refraction or absorption according to the material character of surface of contact, so radiofrequency signal that will directly be received by the radiofrequency signal receiving trap, judge the position angle of radio-frequency (RF) tag with respect to the radiofrequency signal receiving trap, in fact also infeasible.
The radiofrequency signal receiving trap that is set forth in for the novel patent M267550 of known technology such as TaiWan, China number in the positioning system uses oriented antenna (Directional antenna), improve the signal reception of special angle, thereby judge the position angle between radio-frequency (RF) tag and the radiofrequency signal receiving trap.M267550 number novel patent proposes the stationary arrangement of a plurality of inductances, and the magnetic direction that each inductance is produced is fixed, only can be in the sensing range that limits detection signal.But the setting of a plurality of inductances makes the structure of radiofrequency signal receiving trap relatively become complicated.
The TaiWan, China patent of invention openly reaches the open oriented antenna that then do not adopt U.S. Patent Publication US20090322490 number open TW200823770 number, but send trigger pip towards a plurality of directions, judge which trigger pip can cause the radio-frequency (RF) tag response and send radiofrequency signal.But TW200823770 and US20090322490 only limit to passive RF label (Passive-Type RFID Tag) is positioned, and (Active-Type RFID Tag) is just inapplicable for the active radio-frequency (RF) tag that signal triggered for not needing to be triggered.In addition, when M267550, TW200823770 and US20090322490 are applied to locate, still need strength retrogression, judge the distance between radio-frequency (RF) tag and each the radiofrequency signal receiving trap by radiofrequency signal.The judgement of this distance expends the required hardware resource of calculation process, and the judgement of this distance still has the lower problem of precision.
Summary of the invention
At the problems referred to above, the invention provides a kind of simple in structurely, and can increase the radiofrequency signal receiving trap of orientation recognition success ratio.
In order to reach above-mentioned purpose, the present invention proposes a kind of radiofrequency signal receiving trap, is used to receive a radiofrequency signal.The radiofrequency signal receiving trap comprises an electro-magnetic wave absorption housing and a receiving unit.The electro-magnetic wave absorption housing is made with electromagnetic wave absorbent material, and the electro-magnetic wave absorption housing has the breach of accommodation space and at least one connection accommodation space.Receiving unit is arranged in the accommodation space, via the breach received RF signal, thus the receiving angle by breach definition receiving unit.
The present invention is by the receiving angle of the breach decision receiving unit of electro-magnetic wave absorption housing, make the radiofrequency signal receiving trap with simple relatively structure, just can reach the electric wave receiving feature of directive property, thereby judge and send the signal source of radiofrequency signal and the relative direction of radiofrequency signal receiving trap.
Because in the positioning system of known technology, the judgement of distance expends the required hardware resource of calculation process, and the judgement of this distance also has the lower problem of precision.The present invention proposes a kind of positioning system, and it is low to promote accurate positioning degree and spent hardware resource.
In order to reach above-mentioned purpose, the present invention proposes a kind of positioning system, is used to a possible position block that determines that a signal source is positioned at.Positioning system comprises a plurality of radiofrequency signal receiving traps and a back-end server.The radiofrequency signal receiving trap has a receiving angle respectively, and each radiofrequency signal receiving trap is when signal source is positioned at corresponding this radiofrequency signal of receiving angle emission, but each radiofrequency signal receiving trap received RF signal.Back-end server is electrically connected on each radiofrequency signal receiving trap, according to each radiofrequency signal receiving trap received RF signal and determine the possible position block at this signal source place whether.
Back-end server is the common factor by a plurality of receiving angles, judges the possible position block of signal source.Relative distance between the decay of not needs assessment of back-end server radiofrequency signal or calculating radiofrequency signal receiving trap and the signal source.Therefore, positioning system of the present invention significantly reduces and positions needed hardware resource consumption, and the problem low apart from degree of accuracy also avoided in the load that alleviates back-end server simultaneously.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Figure 1A is the stereographic map of first embodiment of the invention.
Figure 1B is the floor map of first embodiment of the invention.
Fig. 2 A is the stereographic map of first embodiment of the invention.
Fig. 2 B is the floor map of first embodiment of the invention.
Fig. 3 A is the stereographic map of first embodiment of the invention.
Fig. 3 B is the floor map of second embodiment of the invention.
Fig. 4 A is the stereographic map of third embodiment of the invention.
Fig. 4 B is the floor map of fourth embodiment of the invention.
Fig. 5 is the floor map of fifth embodiment of the invention.
Fig. 6 is the floor map of sixth embodiment of the invention.
Embodiment
Shown in Figure 1A and Figure 1B, be the described radiofrequency signal receiving trap 100 of first embodiment of the invention, be used to receive the radiofrequency signal 120 that a signal source 210 is sent.Radiofrequency signal receiving trap 100 comprises an electro-magnetic wave absorption housing 110 and at least one receiving unit 130.Signal source 210 can be a passive RF label (Passive-Type RFID Tag) or an active radio-frequency (RF) tag (Active-Type RFID Tag), is as signal source 210 with active radio-frequency (RF) tag in first embodiment.
Shown in Figure 1A and Figure 1B, electro-magnetic wave absorption housing 110 is the polygonal cylinder of a hollow, a triangular prism for example, and have end face 111 and bottom surface 112.Wherein, electro-magnetic wave absorption housing 110 comprises a plurality of sides 113, is connected in end face 111 and bottom surface 112.
Electro-magnetic wave absorption housing 110 has more the breach 114 of accommodation space 115 and at least one connection accommodation space 115.Accommodation space 115 is defined by end face 111, bottom surface 112 and a plurality of side 113 to form.Breach 114 is arranged at the wherein one side of a plurality of sides 113.Electro-magnetic wave absorption housing 110 is that electromagnetic wave absorbent material is made, and electromagnetic wave absorbent material is the electromagnetic wave absorbent material that has the electrical or magnetic of loss under the electromagnetic wave environment of high frequency.Electromagnetic wave absorbent material causes electromagnetic wave (for example this radiofrequency signal 120) to be absorbed loss when being incident to electro-magnetic wave absorption housing 110 effectively.So can significantly reduce the situation that electromagnetic wave penetrates electro-magnetic wave absorption housing 110 or reflected by electro-magnetic wave absorption housing 110.
In first embodiment, electro-magnetic wave absorption housing 110 is tool one breach 114 only.But those skilled in the art can look quantity, position and shape that demand is adjusted breach 114 by the explanation of instructions.
Aforementioned electric magnetic wave absorbing material can be metal soft magnetic materials or powders such as ceramic soft magnetic materials and dielectric ceramic material, and is indivedual or mix.Except the electromagnetism or magnetic electromagnetic wave absorbing material of single characteristic, more should use the combined type absorbing material, to increase the wave frequency scope that electromagnetic wave absorbent material can absorb according to the difference of the frequency of radiofrequency signal 120.
Shown in Figure 1B, receiving unit 130 is arranged in the accommodation space 115 of electro-magnetic wave absorption housing 110.Be absorbed loss when as previously mentioned, radiofrequency signal 120 is incident to electro-magnetic wave absorption housing 110 effectively.So can significantly reduce the situation that radiofrequency signal 120 penetrates electro-magnetic wave absorption housing 110 or reflected by electro-magnetic wave absorption housing 110.Therefore can effectively limit receiving unit 130 can only receive radiofrequency signal 120 via breach 114.By 114 directions of stretching toward the outer of breach, but definable goes out the receiving angle 131 for 130 energy received RF signals 120 of receiving unit.
The present invention effectively limits receiving unit 130 via breach 114 received RF signals 120 by electro-magnetic wave absorption housing 110.Therefore can whether reach a preset strength by absorbent assembly 130 radiofrequency signal of receiving 120, judge whether signal source 210 is positioned at receiving angle 131, so as to signal source 210 is located.
Shown in Fig. 2 A and Fig. 2 B,, be used for the received RF signal 120 that received signal source 210 is sent for the disclosed radiofrequency signal receiving trap 100 of second embodiment of the invention.Second embodiment is characterised in that the form of electro-magnetic wave absorption housing 110.
The electro-magnetic wave absorption housing 110 of second embodiment is the hexahedron of a hollow, and it overlooks kenel as a rectangle.Breach 114 can be positioned at arbitrary plane of electro-magnetic wave absorption housing 110.In present embodiment, electro-magnetic wave absorption housing 110 has two breach 114.Receiving unit 130 is arranged in the accommodation space 115 of electro-magnetic wave absorption housing 110, and two breach 114 lay respectively at the symmetrical two sides of electro-magnetic wave absorption housing 110.The receiving angle 131 that defines receiving unit 130 by this two breach 114 is to extend towards reverse direction.
Shown in Fig. 3 A and Fig. 3 B, be third embodiment of the invention.The 3rd embodiment is characterised in that the form of electro-magnetic wave absorption housing 110.
The electro-magnetic wave absorption housing 110 of the 3rd embodiment is the right cylinder of a hollow.A plurality of breach 114 are positioned at cylindrical outer peripheral face.In the present embodiment, breach 114 is three, and is setting separately, lays respectively at cylindrical outer peripheral face.Define three receiving angles 131 of receiving unit 130 by breach 114.
Shown in Fig. 4 A and Fig. 4 B,, be used for the received RF signal 120 that received signal source 210 is sent for the described radiofrequency signal receiving trap 100 of fourth embodiment of the invention.The 4th embodiment is characterised in that the form of electro-magnetic wave absorption housing 110, and has a plurality of receiving units 130.
The electro-magnetic wave absorption housing 110 of the 4th embodiment has end face 111, bottom surface 112 and a plurality of electro-magnetic wave absorption division board 116.Wherein, the accommodation space 115 between end face 111 and bottom surface 112 is divided into a plurality of independently subspaces by electro-magnetic wave absorption division board 116.Single receiving unit 130 is set in each subspace.Corresponding each subspace on electro-magnetic wave absorption housing 110 and form single breach 114.Therefore, the corresponding respectively different breach 114 of the different receiving unit in each subspace 130.100 of radiofrequency signal receiving traps can be by the corresponding different breach 114 of different receiving unit 130, and 114 directions of stretching toward outers of each breach, thereby defines the receiving angle of each receiving unit 130.In addition, radiofrequency signal receiving trap 100 further can receive radiofrequency signal 120 by which receiving unit 130 and the affiliated signal source 210 of radiofrequency signal 120 is positioned.
As shown in Figure 5, be the described radiofrequency signal receiving trap 100 of fifth embodiment of the invention.Present embodiment is characterised in that radiofrequency signal receiving trap 100 comprises a motor 140, and interconnects with electro-magnetic wave absorption housing 110.Make electro-magnetic wave absorption housing 110 rotate by motor 140 with respect to radiofrequency signal receiving trap 100.And cause the change in breach 114 orientation that are positioned on the electro-magnetic wave absorption housing 110.The receiving angle 131 of receiving unit 130 is changed, be positioned at the radiofrequency signal 120 that different azimuth emissive source 210 sends and receive.And by relation calculating and the location emissive source 210 of motor 140 rotations with receiving angle 131.
As shown in Figure 6, for the described positioning system 200 of sixth embodiment of the invention, be used to a possible position block that determines that signal source 210 is positioned at.
In addition, signal source 210 is preferably active radio-frequency (RF) tag, sends radiofrequency signal 120 on one's own initiative to be received by radiofrequency signal receiving trap 100.But signal source 210 of the present invention is not limited to active radio-frequency (RF) tag, the signal source 210 of first to the 6th embodiment more can be passive RF label, radiofrequency signal receiving trap 100 is launched a trigger pip periodically, sends radiofrequency signal 120 by this trigger pip source driving signal 210.
Similar first to the 5th embodiment, each radiofrequency signal receiving trap 100 of the 6th embodiment has electro-magnetic wave absorption housing 110 and at least one receiving unit 130 respectively.Electro-magnetic wave absorption housing 110 has accommodation space 115 and is communicated with the breach 114 of accommodation space 115.Receiving unit 130 then is arranged in accommodation space 115, and via breach 114 received RF signals 120 of electro-magnetic wave absorption housing 110, by the receiving angle of breach 114 each radiofrequency signal receiving trap 100 of definition.Described electro-magnetic wave absorption housing 110 is that electromagnetic wave absorbent material is made.
As shown in Figure 6, each radiofrequency signal receiving trap 100 is by the breach 114 that self had, and definable goes out its pairing one or more receiving angle 131, and receiving angle 131 is to be recorded in back-end server 220.
When signal source 210 was launched this radiofrequency signal 120 between those radiofrequency signal receiving traps 100, the position of signal source 210 was to drop on specific receiving angle 131, and is received this radiofrequency signal 120 by specific one or more radiofrequency signal receiving traps 100.Therefore whether back-end server 220 receives signal source 210 radiofrequency signal of sending 120 according to each radiofrequency signal receiving trap 100, and the receiving angle 131 in the orientation, place of decision signal source 210, and, judge that this intersection area is the possible position block of signal source 210 via the common factor of the receiving angle 131 at place.
Positioning system of the present invention is the common factor by receiving angle 131, judges the possible position block of signal source 210, does not relate to the assessment of radiofrequency signal 120 decay or the calculating of radiofrequency signal receiving trap 100 and signal source 210 relative distances.Therefore, positioning system of the present invention can significantly reduce and positions needed hardware resource consumption, and the problem low apart from degree of accuracy also avoided in the load that alleviates back-end server 220 simultaneously.
Radiofrequency signal receiving trap 100 of the present invention utilizes different form of electro-magnetic wave absorption housing and shielding, receives the radiofrequency signal 120 from specific receiving angle.And it is applied to positioning system, by many groups radiofrequency signal receiving traps 100 received RF signals 120, make its signal contrast intensity that improves open area, and increase the orientation recognition success ratio.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (12)
1. a radiofrequency signal receiving trap is used to receive a radiofrequency signal, comprising:
One electro-magnetic wave absorption housing, made with electromagnetic wave absorbent material, described electro-magnetic wave absorption housing has the breach of an accommodation space and at least one this accommodation space of connection; And
At least one receiving unit is arranged in this accommodation space, receives this radiofrequency signal via this breach, and defines a receiving angle of this receiving unit by this breach.
2. radiofrequency signal receiving trap as claimed in claim 1, it is characterized in that, this electro-magnetic wave absorption housing is the polygonal cylinder of a hollow, have an end face, a bottom surface and connect a plurality of sides of this end face and this bottom surface, and this breach is positioned at the wherein one side of most sides.
3. radiofrequency signal receiving trap as claimed in claim 1 is characterized in that, this electro-magnetic wave absorption housing is the hexahedron of a hollow, and this breach is positioned at arbitrary plane of this electro-magnetic wave absorption housing.
4. radiofrequency signal receiving trap as claimed in claim 1 is characterized in that, this electro-magnetic wave absorption housing is the right cylinder of a hollow, and this breach is positioned at this cylindrical outer peripheral face.
5. radiofrequency signal receiving trap as claimed in claim 4 is characterized in that, this electro-magnetic wave absorption housing has a plurality of breach, and those breach are positioned at this cylindrical outer peripheral face and are separately and are provided with.
6. radiofrequency signal receiving trap as claimed in claim 1, it is characterized in that, this electro-magnetic wave absorption housing has an end face, a bottom surface and a plurality of electro-magnetic wave absorption division board, this accommodation space is divided into a plurality of independently subspaces between this end face and this bottom surface and by those electro-magnetic wave absorption division boards, single receiving unit is set in each subspace, and on this electro-magnetic wave absorption housing corresponding each subspace and form single breach.
7. radiofrequency signal receiving trap as claimed in claim 1 is characterized in that, described radiofrequency signal receiving trap comprises a motor, and this motor drives this electro-magnetic wave absorption housing and rotates.
8. positioning system, in order to the possible position block that determines that a signal source is positioned at, and this signal source sends a radiofrequency signal, and this positioning system comprises:
A plurality of radiofrequency signal receiving traps have a receiving angle respectively, and respectively this radiofrequency signal receiving trap receives this radiofrequency signal when this signal source is positioned at corresponding receiving angle; And
One back-end server is electrically connected on respectively this radiofrequency signal receiving trap, whether receives this radiofrequency signal and determines the possible position block of this signal source according to this radiofrequency signal receiving trap respectively.
9. positioning system as claimed in claim 8, it is characterized in that, respectively this radiofrequency signal receiving trap comprises an electro-magnetic wave absorption housing and at least one receiving unit, this receiving unit receives this radiofrequency signal via at least one breach of this electro-magnetic wave absorption housing, and defines the receiving angle of this radiofrequency signal receiving trap by this breach.
10. positioning system as claimed in claim 9 is characterized in that, this electro-magnetic wave absorption housing is to make with electromagnetic wave absorbent material, and this electro-magnetic wave absorption housing has an accommodation space, and this breach is communicated with this accommodation space.
11. the positioning system according to claim 9 is characterized in that, those radiofrequency signal receiving traps are launched a trigger pip periodically, drive this signal source and send this radiofrequency signal.
12. positioning system as claimed in claim 8, it is characterized in that, whether this back-end server foundation respectively this radiofrequency signal receiving trap receives this radiofrequency signal, determine this receiving angle at the place of this signal source, and determine that the common factor of the receiving angle at those places is the possible position block of this signal source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101774923A CN102236091A (en) | 2010-05-07 | 2010-05-07 | Radio frequency signal receiving device and positioning system applying same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101774923A CN102236091A (en) | 2010-05-07 | 2010-05-07 | Radio frequency signal receiving device and positioning system applying same |
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| CN102236091A true CN102236091A (en) | 2011-11-09 |
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| CN2010101774923A Pending CN102236091A (en) | 2010-05-07 | 2010-05-07 | Radio frequency signal receiving device and positioning system applying same |
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Cited By (5)
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| CN103297081A (en) * | 2013-06-24 | 2013-09-11 | 成都网动光电子技术股份有限公司 | Radio frequency receiving and transmitting device |
| CN103352719A (en) * | 2013-07-23 | 2013-10-16 | 苏州倚信绿莱特电子科技有限公司 | Self-rescuer system for poison gas |
| CN104062647A (en) * | 2013-11-22 | 2014-09-24 | 苏州天趣信息科技有限公司 | Device for detecting wireless signals |
| CN106761932A (en) * | 2016-12-23 | 2017-05-31 | 重庆市合川区九峰煤炭有限公司 | A kind of mine detection lifesaving servicing unit |
| CN106761909A (en) * | 2016-12-23 | 2017-05-31 | 重庆市合川区九峰煤炭有限公司 | A kind of mine detection method for detecting lifesaving servicing unit |
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Application publication date: 20111109 |