CN204302999U - A kind of RF identification Precise Position System of non-blind area - Google Patents
A kind of RF identification Precise Position System of non-blind area Download PDFInfo
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- CN204302999U CN204302999U CN201420709698.XU CN201420709698U CN204302999U CN 204302999 U CN204302999 U CN 204302999U CN 201420709698 U CN201420709698 U CN 201420709698U CN 204302999 U CN204302999 U CN 204302999U
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Abstract
The utility model discloses a kind of RF identification Precise Position System of non-blind area, and exciter low-frequency excitation module comprises at least two-way work schedule and staggers and the energizing circuit of different numbering, and different energizing circuit forms low-frequency excitation signal common factor district by low-frequency antenna; Identification information is also sent to read write line by ultra-high frequency wireless sending module by low frequency reception module acquires low-frequency excitation signal; Ultra-high frequency wireless label signal receiver module receives label signal by ultra-high frequency antenna, and label information and low-frequency excitation identification information are sent to host computer; And synchronizing signal is sent to a MCU by wireless by ultra-high frequency wireless synchronizing signal sending module, control the synchronous regime of the work schedule of low-frequency excitation circuit.The utility model utilizes ultra-high frequency wireless signal synchronous low frequency triggering signal sequential and then realizes management objectives non-blind area and accurately locates.
Description
Technical field
The utility model relates to a kind of RF identification Precise Position System of non-blind area.
Background technology
Active R IFD technology has been widely used in the indoor coarse positioning of personnel and article, but, general active RFID navigation system also exist positioning time long, locate inaccurate, positioning precision is poor shortcomings such as (being generally tens meters).For hi-Fix and in-plant turnover location, existing active RFID technology has been difficult to meet the demands, simultaneously, because the orientation distance of low frequency is generally 5 meters farthest, for meeting the application of the personnel positioning such as tunnel and mine, need to expand orientation distance, tunnel creates the synchronous demand of signal simultaneously; In order to meet hi-Fix and the demand closely passing in and out location, improve the positioning precision of active RFID, this case produces thus.
Utility model content
The purpose of this utility model is the RF identification Precise Position System providing a kind of non-blind area, and the non-blind area utilizing ultra-high frequency wireless signal synchronous low frequency triggering signal sequential and then realize management objectives is accurately located.
For reaching above-mentioned purpose, solution of the present utility model is:
A RF identification Precise Position System for non-blind area, comprises exciter, electronic tag, read write line and host computer;
Exciter comprises ultra-high frequency wireless signal receiving module, low-frequency excitation module and a MCU, and ultra-high frequency wireless signal receiving module and low-frequency excitation module are connected with a MCU respectively; Exciter low-frequency excitation module comprises at least two-way work schedule and to stagger the energizing circuit of different numbering, and different energizing circuit forms low-frequency excitation signal common factor district by low-frequency antenna;
Electronic tag comprises low frequency reception module, ultra-high frequency wireless sending module and the 2nd MCU, and low frequency reception module and ultra-high frequency wireless sending module are connected with the 2nd MCU respectively; Identification information is also sent to read write line by ultra-high frequency wireless sending module by low frequency reception module acquires low-frequency excitation signal;
Read write line comprises ultra-high frequency wireless synchronizing signal sending module, ultra-high frequency wireless label signal receiver module and the 3rd MCU, and ultra-high frequency wireless synchronizing signal sending module and ultra-high frequency wireless label signal receiver module are connected with the 3rd MCU; Ultra-high frequency wireless label signal receiver module receives label signal by ultra-high frequency antenna, and synchronizing signal is sent to exciter by ultra-high frequency wireless synchronizing signal sending module;
The work schedule of described energizing circuit is different, supposes t
0for the synchronous base time, T is the low-frequency antenna work period, and T1 is that low frequency sends the cycle, and T2 is low frequency idling cycle, and T=T1+ T2, T3 are the transmission cycle of synchronizing signal, energizing circuit A
1, A
2, A
3and A
nbe operated in t respectively
0+ (n*i) T, t
0+ (n*i) T+T, t
0+ (n*i) T+2T and t
0under+(n*i) T+nT sequential, i is natural number, does not interfere with each other;
Between different exciter energizing circuit, time migration is different, and read write line ultra-high frequency wireless synchronizing signal sending module time offset between different exciter energizing circuit is less than low frequency idling cycle T
2within timed sending ultra-high frequency wireless broadcast synchronization signal to exciter, correct different exciter each road energizing circuit synchronous base time, make the work schedule between the energizing circuit of different exciter each road synchronous.
Further, the energizing circuit of described low-frequency excitation module is set to four tunnels.
Further, described exciter is at least two, and the energizing circuit work schedule of the same numbering that different exciter is arranged is identical.
Further, when described electronic tag is in low-frequency excitation signaling zone, the low-frequency excitation signal of each energizing circuit of exciter described in the low frequency reception module acquires of electronic tag, and by the 2nd MCU verification, the low-frequency excitation signal that timing screening signal strength signal intensity is the strongest, and the identification information of low frequency signal the strongest for described signal strength signal intensity is sent to read write line by ultra-high frequency wireless sending module.
A RF identification accurate positioning method for non-blind area, is characterized in that: comprise the following steps:
One, in exciter low-frequency excitation module, arrange at least two-way work schedule to stagger the energizing circuit of different numbering, different energizing circuit forms low-frequency excitation signal common factor district by low-frequency antenna, supposes t
0for the synchronous base time, T is the low-frequency antenna work period, and T1 is that low frequency sends the cycle, and T2 is low frequency idling cycle, and T=T1+ T2, T3 are the transmission cycle of synchronizing signal, energizing circuit A
1, A
2, A
3and A
nbe operated in t respectively
0+ (n*i) T, t
0+ (n*i) T+T, t
0+ (n*i) T+2T and t
0under+(n*i) T+nT sequential, i is natural number, does not interfere with each other.
Two, between the energizing circuit of different exciter, time migration is different, and read write line ultra-high frequency wireless synchronizing signal sending module time offset between different exciter energizing circuit is less than low frequency idling cycle T
2within timed sending ultra-high frequency wireless broadcast synchronization signal to exciter, correct different exciter each road energizing circuit synchronous base time, make the work schedule between the energizing circuit of different exciter each road synchronous; After synchronous, the energizing circuit of each exciter is before the starting point of next work period starts the new work period simultaneously and extends to the arrival of next synchronizing signal.
Under the prerequisite that multiple stage exciter work schedule is synchronous, can guarantee to be positioned at common factor district often adjacent two exciters difference numbering excitation antenna excite sequential different, realize all standing of large-scale non-blind area excitation signal, thus realize the accurate location of non-blind area.
Three, identification information is also sent to read write line by ultra-high frequency wireless sending module by electronic tag low frequency reception module acquires low-frequency excitation signal.
Four, read write line ultra-high frequency wireless label signal receiver module receives label signal by ultra-high frequency antenna, and label information and low-frequency excitation identification information are sent to host computer, and synchronizing signal is sent to exciter by ultra-high frequency wireless synchronizing signal sending module, the RF identification realizing non-blind area is accurately located.
Hyperfrequency refers to the radio frequency band of 0.3-3GHz, and this frequency range has that message transmission rate is higher, the feature of long distance of signal transmission.
After adopting such scheme, the utility model exciter low-frequency excitation module comprises at least two-way work schedule and to stagger the energizing circuit of different numbering, to ensure that electronic tag is at synchronization, a certain road energizing circuit only by a certain exciter excites, different energizing circuit forms low-frequency excitation signal common factor district by low-frequency antenna, if do not form low-frequency excitation signal common factor district, blind area will be formed; Therefore, no matter electronic tag is in any position, each low-frequency antenna work period (T) in the time electronic tag can be excited by a wherein road low frequency signal, realize non-blind area location; Meanwhile, read write line ultra-high frequency wireless synchronizing signal sending module time offset between different exciter energizing circuit is less than low frequency idling cycle T
2within timed sending ultra-high frequency wireless broadcast synchronization signal to exciter, correct different exciter each road energizing circuit synchronous base time, make work schedule between the energizing circuit of different exciter each road synchronous, realize accurately locating.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the structured flowchart of the utility model exciter;
Fig. 3 is the low frequency signal working timing figure of the utility model exciter multichannel low-frequency excitation module;
Fig. 4 is the structured flowchart of the utility model read write line;
Fig. 5 is the structured flowchart of the utility model electronic tag;
Fig. 6 is the location deployment diagram of the utility model low-frequency excitation module.
Label declaration
Read write line 10, ultra-high frequency wireless synchronizing signal sending module 101, ultra-high frequency wireless label signal receiver module the 102, the 3rd MCU103, host computer 20, electronic tag 30, low frequency reception module 301, ultra-high frequency wireless sending module 302, the 2nd MCU303, exciter 40, ultra-high frequency wireless signal receiving module 401, ultra-high frequency antenna 402, low-frequency excitation module 403, low-frequency antenna 404, a MCU405, low-frequency excitation signal common factor district 50.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the utility model is described in detail.
Consult shown in Fig. 1 to Fig. 6, the RF identification Precise Position System of a kind of non-blind area that the utility model discloses, comprises read write line 10, host computer 20, electronic tag 30 and exciter 40.
As shown in Figure 1, read write line 10 and host computer 20 wired connection, read write line 10 is communicated to connect by ultra-high frequency wireless synchronizing signal and exciter 40, and exciter 40 is communicated to connect by low-frequency wireless excitation signal and electronic tag 30, and electronic tag 30 is connected with read write line 10 by ultra-high frequency wireless signal.
As shown in Figure 2, exciter 40 comprises ultra-high frequency wireless signal receiving module 401, ultra-high frequency antenna 402, low-frequency excitation module 403, low-frequency antenna 404 and control module the one MCU405, and ultra-high frequency wireless signal receiving module 401 and low-frequency excitation module 403 are connected with a MCU405 respectively; Exciter 40 low-frequency excitation module 403 comprises at least two-way work schedule and to stagger the energizing circuit of different numbering, and different energizing circuit forms low-frequency excitation signal common factor district by low-frequency antenna 404.In the present embodiment, exciter 40 also comprises power circuit block, memory cell, wire transmission module and functional switch module etc.
As shown in Figure 5, electronic tag 30 comprises low frequency reception module 301, ultra-high frequency wireless sending module 302 and the 2nd MCU303, and low frequency reception module 301 and ultra-high frequency wireless sending module 302 are connected with the 2nd MCU303 respectively; Low frequency reception module 301 gathers low-frequency excitation signal, by ultra-high frequency wireless sending module 302, identification information is sent to read write line 10.
As shown in Figure 4, read write line 10 comprises ultra-high frequency wireless synchronizing signal sending module 101, ultra-high frequency wireless label signal receiver module 102 and the 3rd MCU103, and ultra-high frequency wireless synchronizing signal sending module 101 and ultra-high frequency wireless label signal receiver module 102 are connected with the 3rd MCU103 and the 3rd MCU103 is connected with host computer 20; Ultra-high frequency wireless label signal receiver module 102 receives label signal by ultra-high frequency antenna, and synchronizing signal is sent to exciter by ultra-high frequency wireless synchronizing signal sending module.In the present embodiment, read write line 10 also comprises power circuit block, memory cell and wire transmission module.
Ultra-high frequency wireless synchronizing signal sending module 101 is responsible for timed sending hyperfrequency synchronizing signal, electronic tag 30 radio frequency signal in ultra-high frequency wireless label signal receiver module 102 Received signal strength coverage, and information is verified, for its signal strength values of RF tag signal record and locating information, above information is passed to the 3rd MCU103.
3rd MCU103 is responsible for above information to unpack temporary, and by RS232 or RS485 or Ethernet, information is sent to host computer 20, is realized the management of information by host computer 20, and the setting command simultaneously receiving host computer 20 is arranged read write line 10.Memory cell is responsible for the configuration information and the system set-up parameters that store read write line 10, and power down is preserved, so that next time, start did not need the parameter information resetting read write line 10.
The work schedule of described energizing circuit is different, supposes t
0for the synchronous base time, T is the low-frequency antenna work period, T
1for low frequency sends the cycle, T
2for low frequency idling cycle, T=T
1+ T
2, T3 is the transmission cycle of synchronizing signal, energizing circuit A
1, A
2, A
3and A
nbe operated in t respectively
0+ (n*i) T, t
0+ (n*i) T+T, t
0+ (n*i) T+2T and t
0under+(n*i) T+nT sequential, i is natural number, does not interfere with each other, as shown in Figure 3.
Described low-frequency excitation module 403 sends low-frequency excitation signal by low-frequency antenna 404, and form low-frequency excitation signal common factor district 50, as shown in Figure 6, electronic tag 30 low frequency reception module 301 gathers this low-frequency excitation signal and by ultra-high frequency wireless sending module 302, identification information is sent to read write line 10, read write line 10 ultra-high frequency wireless label signal receiver module 102 receives this label signal by ultra-high frequency antenna, and label information and low-frequency excitation identification information are sent to host computer.The energizing circuit work schedule of described low-frequency excitation module 403 is different, and make space not have low-frequency excitation signal blind zone, electronic tag 30 is in any position and can be excited by low frequency signal, and the RF identification realizing non-blind area is accurately located.
In the present embodiment, the energizing circuit of the low-frequency excitation module 403 of described exciter 40 is set to four tunnels.Because the power-on time of different circuit, circuit hardware difference, between different energizing circuit, time migration is different, and for ensureing that the non-blind area of system covers, the time migration between different exciter energizing circuit must be less than low frequency idling cycle T
2, periodically send synchronizing signal by read write line hyperfrequency sending module in native system and ensure that the time migration between different exciter energizing circuit is less than low frequency idling cycle T
2.by the actual test of each energizing circuit of the multiple stage exciter to system, show that each energizing circuit real offset of multiple stage exciter reaches low frequency idling cycle T
2required time t
p, T synchronizing cycle of read write line ultra-high frequency wireless synchronizing signal sending module
3should much smaller than t
p, after synchronous, the energizing circuit of each exciter is before the starting point of next work period starts the new work period simultaneously and extends to the arrival of next synchronizing signal.
Read write line 10 ultra-high frequency wireless synchronizing signal sending module 101 is with cycle T
3timed sending ultra-high frequency wireless broadcast synchronization signal, to exciter 40, corrects different exciter each road energizing circuit synchronous base time, makes the work schedule between the energizing circuit of different exciter each road synchronous, realizes non-blind area and accurately locate.
The low-frequency excitation module 403 of exciter 40 has No. four energizing circuits, respectively connect four 125KHz excitation antenna, under spacious environment, excite distance be stabilized in 5 meters of scopes farthest, energizing circuit low frequency activation schedule as shown in Figure 3, t
0for the synchronous base time, T is the low-frequency antenna work period, T
1for low frequency sends the cycle, T
2for low frequency idling cycle.When the one above energizing circuit in road of an exciter 40 is unlocked, every road antenna sends low-frequency excitation signal according to time-division multiplex wheel of the law stream.Just because of exciter 40 there are maximum 4 mutual exclusions excite sequential, system allows maximum 4 excitation signal districts to produce to occur simultaneously and do not interfere with each other.Under the prerequisite that multiple stage exciter work schedule is synchronous, can guarantee to be positioned at common factor district often adjacent two exciters difference numbering excitation antenna excite sequential different, realize all standing of large-scale non-blind area excitation signal, thus realize the accurate location of non-blind area.
In actual use, often need multiple stage exciter 40 jointly one among a small circle in work, excitation signal is made to produce common factor district, when electronic tag 30 is in signal common factor district, different exciter 40 excite sequential inconsistent, low-frequency excitation signal is easy to clash, and causes electronic tag 30 correctly to identify.Exciter 40 reads the ultra-high frequency wireless synchronizing signal from read write line 10, and correct the energizing circuit synchronous base time, correction error is about 8 microseconds, much smaller than low frequency idling cycle T
2, make the low-frequency excitation circuit working timing synchronization in hyperfrequency synchronized broadcast region between different exciter 40.Carry out the method for synchronization owing to have employed ultra-high frequency wireless signal, the installation of exciter 40 is simpler.
As shown in Figure 5, for realizing low-power consumption, accurately location and long-haul reliable transmission, electronic tag 30 adopts dual band communication scheme.Electronic tag 30 also comprises power circuit block, is in resting state when electronic tag 30 is flat, and power consumption is extremely low.When electronic tag 30 enters after excitation area correctly waken up by low frequency, by excitation information and electronic tag, information of having by oneself is sent by hyperfrequency sending module.
The utility model electronic tag 30 can be collected and also verify excitation information by the 2nd MCU within the time period of maximum 4 low frequency operation cycles (T), therefrom screen the strongest low frequency signal of signal strength signal intensity, recycling time-division multiplex method, information of excitation information and label being had by oneself sends to read write line 10 when hyperfrequency channel idle by ultra-high frequency wireless sending module 302, after read write line 10 receives label information, communicate with host computer 20, host computer 20 analyzing tags information thus realize monitoring objective function.Even if the utility model makes label be in low-frequency excitation signal common factor district, also can realize location, and pretreatment has been done to locating information, reduce transinformation, save bandwidth, decrease host computer 20 positions calculations load simultaneously.
As shown in Figure 6, described exciter 40 is at least two, and the energizing circuit work schedule of the same numbering that different exciter 40 is arranged is identical.
The utility model also discloses a kind of RF identification accurate positioning method of non-blind area, and as shown in Figure 6, E represents the energizing circuit that exciter 40, A represents exciter 40, comprises the following steps:
One, in exciter 40 low-frequency excitation module 403, arrange at least two-way work schedule to stagger the energizing circuit of different numbering, different energizing circuit forms low-frequency excitation signal common factor district by low-frequency antenna, supposes t
0for the synchronous base time, T is the low-frequency antenna work period, and T1 is that low frequency sends the cycle, and T2 is low frequency idling cycle, and T=T1+ T2, T3 are the transmission cycle of synchronizing signal, energizing circuit A
1, A
2, A
3and A
nbe operated in t respectively
0+ (n*i) T, t
0+ (n*i) T+T, t
0+ (n*i) T+2T and t
0under+(n*i) T+nT sequential, i is natural number, does not interfere with each other;
Two, between different exciter energizing circuit, time migration is different, and read write line 10 ultra-high frequency wireless synchronizing signal sending module 101 time offset between different exciter energizing circuit is less than low frequency idling cycle T
2within timed sending ultra-high frequency wireless broadcast synchronization signal to exciter 40, correct different exciter each road energizing circuit synchronous base time, make the work schedule between the energizing circuit of different exciter each road synchronous; Under the prerequisite that multiple stage exciter work schedule is synchronous, can guarantee to be positioned at common factor district often adjacent two exciters difference numbering excitation antenna excite sequential different, realize all standing of large-scale non-blind area excitation signal, thus realize the accurate location of non-blind area.
Three, electronic tag 30 low frequency reception module 301 gathers low-frequency excitation signal and excites, and by ultra-high frequency wireless sending module 302, identification information is sent to read write line 10;
Four, read write line 10 ultra-high frequency wireless label signal receiver module 102 receives label signal by ultra-high frequency antenna, and synchronizing signal is sent to exciter by ultra-high frequency wireless synchronizing signal sending module, thus the RF identification realizing non-blind area is accurately located.
Four energizing circuits of exciter 40 described in the utility model should arrange different numberings, and host computer 20 according to the locating information in electronic tag 30 packet, can obtain the pin numbers of electronic tag 30, judge label is in which excitation antenna position.System by the further localizing objects of excitation intensity value of electronic tag, or reduces to excite distance to increase system accuracy.
Claims (4)
1. a RF identification Precise Position System for non-blind area, is characterized in that: comprise exciter, electronic tag, read write line and host computer;
Exciter comprises ultra-high frequency wireless signal receiving module, low-frequency excitation module and a MCU, and ultra-high frequency wireless signal receiving module and low-frequency excitation module are connected with a MCU respectively; Exciter low-frequency excitation module comprises at least two-way work schedule and staggers and the energizing circuit of different numbering, and different energizing circuit forms low-frequency excitation signal common factor district by low-frequency antenna;
Electronic tag comprises low frequency reception module, ultra-high frequency wireless sending module and the 2nd MCU, and low frequency reception module and ultra-high frequency wireless sending module are connected with the 2nd MCU respectively; Identification information is also sent to read write line by ultra-high frequency wireless sending module by low frequency reception module acquires low-frequency excitation signal;
Read write line comprises ultra-high frequency wireless synchronizing signal sending module, ultra-high frequency wireless label signal receiver module and the 3rd MCU, and ultra-high frequency wireless synchronizing signal sending module and ultra-high frequency wireless label signal receiver module are connected with the 3rd MCU; Ultra-high frequency wireless label signal receiver module receives label signal by ultra-high frequency antenna, and synchronizing signal is sent to exciter by ultra-high frequency wireless synchronizing signal sending module; Label information and low-frequency excitation identification information are sent to host computer by the 3rd MCU;
The work schedule of described energizing circuit is different, supposes t
0for the synchronous base time, T is the low-frequency antenna work period, T
1for low frequency sends the cycle, T
2for low frequency idling cycle, T=T
1+ T
2, energizing circuit A
1, A
2, A
3and A
nbe operated in t respectively
0+ (n*i) T, t
0+ (n*i) T+T, t
0+ (n*i) T+2T and t
0under+(n*i) T+nT sequential, i is natural number, does not interfere with each other;
Between different exciter energizing circuit, time migration is different, and read write line ultra-high frequency wireless synchronizing signal sending module time offset between different exciter energizing circuit is less than low frequency idling cycle T
2within timed sending ultra-high frequency wireless broadcast synchronization signal to exciter, correct different exciter each road energizing circuit synchronous base time t
0, make the work schedule between the energizing circuit of different exciter each road synchronous.
2. the RF identification Precise Position System of a kind of non-blind area as claimed in claim 1, is characterized in that: the energizing circuit of described low-frequency excitation module is set to four tunnels.
3. the RF identification Precise Position System of a kind of non-blind area as claimed in claim 1, is characterized in that: described exciter is at least two, and the energizing circuit work schedule of the same numbering that different exciter is arranged is identical.
4. the RF identification Precise Position System of a kind of non-blind area as claimed in claim 1, it is characterized in that: when described electronic tag is in low-frequency excitation signaling zone, the low-frequency excitation signal of each energizing circuit of exciter described in the low frequency reception module acquires of electronic tag, and by the 2nd MCU verification, the low-frequency excitation signal that timing screening signal strength signal intensity is the strongest, and the identification information of low frequency signal the strongest for described signal strength signal intensity is sent to read write line by ultra-high frequency wireless sending module.
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|---|---|---|---|
| CN201420709698.XU CN204302999U (en) | 2014-05-06 | 2014-11-24 | A kind of RF identification Precise Position System of non-blind area |
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|---|---|---|---|
| CN201410187657 | 2014-05-06 | ||
| CN201420709698.XU CN204302999U (en) | 2014-05-06 | 2014-11-24 | A kind of RF identification Precise Position System of non-blind area |
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| CN204302999U true CN204302999U (en) | 2015-04-29 |
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| CN201410678123.0A Active CN104392255B (en) | 2014-05-06 | 2014-11-24 | The radio frequency identification Precise Position System and localization method of a kind of non-blind area |
| CN201420709698.XU Expired - Fee Related CN204302999U (en) | 2014-05-06 | 2014-11-24 | A kind of RF identification Precise Position System of non-blind area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104392255A (en) * | 2014-05-06 | 2015-03-04 | 厦门安福迪信息科技有限公司 | No-blind zone precise locating system and locating method for radio frequency identification |
| CN109614837A (en) * | 2019-01-25 | 2019-04-12 | 四川璧虹众杰科技有限公司 | Low-frequency wireless driver collision-proof method and system |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104700136B (en) * | 2015-03-30 | 2017-11-14 | 上海十贝电子科技有限公司 | Article stowed location automatic station-keeping system and method |
| CN104700135B (en) * | 2015-03-30 | 2017-08-29 | 上海十贝电子科技有限公司 | Chain network alignment system and method |
| CN105426797B (en) * | 2015-10-30 | 2018-07-06 | 上海十贝电子科技有限公司 | The LF triggering methods of random transmitting anti-collision |
| CN107290718A (en) * | 2017-08-11 | 2017-10-24 | 苏州真趣信息科技有限公司 | Alignment system |
| CN111356070B (en) * | 2018-12-04 | 2022-03-11 | 浙江宇视科技有限公司 | Positioning method and device |
| CN111310486B (en) * | 2018-12-12 | 2023-07-14 | 航天信息股份有限公司 | Vehicle identification method and supervision equipment |
| CN112637445B (en) * | 2021-01-06 | 2022-12-27 | 上海市建筑科学研究院有限公司 | Three-dimensional motion synchronous measurement method based on multiple high-frequency cameras |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6765531B2 (en) * | 1999-01-08 | 2004-07-20 | Trueposition, Inc. | System and method for interference cancellation in a location calculation, for use in a wireless location system |
| CN1949244B (en) * | 2005-10-10 | 2012-01-11 | 上海真灼电子技术有限公司 | Method of multi reading writing device coordinated working for radio frequency identifying system |
| CN102412870A (en) * | 2010-09-21 | 2012-04-11 | 国民技术股份有限公司 | Fast-access near field wireless communication module used for controlling communication range |
| CN104392255B (en) * | 2014-05-06 | 2017-06-06 | 厦门安福迪信息科技有限公司 | The radio frequency identification Precise Position System and localization method of a kind of non-blind area |
-
2014
- 2014-11-24 CN CN201410678123.0A patent/CN104392255B/en active Active
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104392255A (en) * | 2014-05-06 | 2015-03-04 | 厦门安福迪信息科技有限公司 | No-blind zone precise locating system and locating method for radio frequency identification |
| CN104392255B (en) * | 2014-05-06 | 2017-06-06 | 厦门安福迪信息科技有限公司 | The radio frequency identification Precise Position System and localization method of a kind of non-blind area |
| CN109614837A (en) * | 2019-01-25 | 2019-04-12 | 四川璧虹众杰科技有限公司 | Low-frequency wireless driver collision-proof method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104392255B (en) | 2017-06-06 |
| CN104392255A (en) | 2015-03-04 |
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