CN102014397A - Radio frequency identification method and radio frequency identification system - Google Patents
Radio frequency identification method and radio frequency identification system Download PDFInfo
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- CN102014397A CN102014397A CN2010102773805A CN201010277380A CN102014397A CN 102014397 A CN102014397 A CN 102014397A CN 2010102773805 A CN2010102773805 A CN 2010102773805A CN 201010277380 A CN201010277380 A CN 201010277380A CN 102014397 A CN102014397 A CN 102014397A
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Abstract
The invention relates to a radio frequency identification technology and particularly discloses a radio frequency identification method and a radio frequency identification system, which are applied in a monitoring management system for personnel, vehicles, commodities and the like. In the invention, by adopting a low-frequency awakening and information verification technology, an active tag can be subjected to high-frequency communication only within a low-frequency coverage area and does not need to work in other time, which reduces electric consumption of above 99% of time, therefore, the power supply of high-capacity batteries is not needed so that the size of the tag is further and effectively reduced. Compared with the traditional radio frequency identification technology, by adopting the mode combining the low-frequency identification and microwave signal intensity, the invention effectively improves the positioning precision to a high-speed moving object. The radio frequency identification method and system can realize the full duplex interaction of data, wherein the full duplex data communication between multiple identification objects and an information center can be realized within a large range by utilizing the characteristics of longer microwave communication distance and large wireless network capacity.
Description
Technical field
The invention belongs to the REID field, be specifically related to the radio-frequency identification method and the radio-frequency recognition system that use in the monitoring management systems such as personnel, vehicle and commodity.
Background technology
Radio frequency discrimination RFID (Radio Frequency Identification) technology, be a kind ofly to come automatic identifying object (label) and obtain relevant information, and need not to set up between recognition system and the identifying object (label) communication technology that machinery or optics contact by radiofrequency signal.
Existing radio-frequency recognition system mainly is made up of three parts: identifying object (label), reader, antenna, reader is given label by the radio wave of antenna transmission one characteristic frequency, send inner identification code (ID Code) to reader to drive label, after reader receives this identification code, deliver to central processing system again and carry out relevant data processing.
This technology not only can be discerned swiftly passing object, and can discern a plurality of objects (label) simultaneously, and has simple and quick characteristics.Based on above-mentioned advantage, this technology as one of core technology of Internet of Things, is widely used in the monitoring management systems such as personnel, vehicle and commodity.As: personnel's access door access control system, mass transit card Fare Collection System, vehicle non-parking charge, article identification and warehousing management etc.Wherein, but identifying object (label) be installed on personnel, vehicle and the commodity, unique identifier of label storage inside (ID Code) is used to distinguish different objects, by the remote-wireless information interaction, finishes the function of identifying object.
Wherein, the RFID tag class is a lot, and mode classification is various.Difference by applying frequency can be divided into low frequency (LF), high frequency (HF), hyperfrequency (UHF), microwave, and corresponding representative frequency is respectively: low frequency 135KHz is following, high frequency 13.56MHz, hyperfrequency 860M-960MHz, microwave 2.4GHz, 5.8GHz.
At present, using more is high frequency, hyperfrequency and three frequency ranges of microwave, but each frequency range all can't be widely used owing to the limitation of self.
Wherein: low-frequency range adopts modulation techniques such as FSK, ASK, has tangible boundary effect, effective decipherment distance can be controlled within the limits prescribed, but because its transmission rate is lower, can't be realized in the high-speed moving object two-way interactive of multidata amount.
Wherein: 13.56MHz high band decipherment distance has only 80 centimetres at most, can't realize remote identification.
Wherein: hyper band, international typical frequency of utilization 915MHz is divided into 840MHz-845MHz and two frequency ranges of 920MHz-925MHz in China, and decipherment distance is 20 meters in theory, but because anti-metal ability, the real work distance is a 3-8 rice only.
Wherein: microwave section, real work decipherment distance can reach 70 meters, but because influences such as the scattering of microwave and multipath interference, in 2-7 rice, recognition object does not have directivity, can not realize simple target identification, and its work energy consumption is higher, needs the equipment high capacity cell, influences the use of label.
In summary, between label and the reader, adopt the electromagnetic wave of single-frequency to carry out half-duplex communication mode in the present radio-frequency recognition system, can't realize the accurate orientation recognition in the wide region, and active label work energy consumption is higher.For example, No. 200710069085.9 patents of China CN " active radio frequency identification ", adopt 433MHz radio frequency chip CC1100 to realize contactless long-range radio-frequency identification exactly, its label must send a rf data every 3 seconds, and CC1100 reception power consumption is 15mA, therefore the label most of the time all sending data, will cause a large amount of wastes of energy consumption like this.
Summary of the invention
In order to address the above problem, first purpose of the present invention is to provide the radio-frequency identification method that a kind of energy consumption is low, the zone location precision is high, and second purpose of the present invention is to provide a kind of radio-frequency recognition system of correspondence.
For realizing above-mentioned first goal of the invention, the present invention in the wide supervisory control system of monitoring range the technical scheme that adopts as follows:
A kind of radio-frequency identification method of wide region is applicable in the monitoring management system of supervision wide ranges, is at least one subregion with described supervision scope division, and the low frequency base station and the first high frequency base station are installed in each described subregion; The size of described subregion is consistent with the low frequency footprint size of low frequency base station in being installed on this subregion; The second high frequency base station is installed between the central controlling platform of described first high frequency base station and described monitoring management system; A low frequency signal is transmitted to the active label that enters its subregion in described low frequency base station, includes the low frequency base coded information of this low frequency base station in described low frequency signal; Described active label is compared the low frequency signal that receives, if the low frequency base coded that prestores with it is complementary, the first high frequency base station of then described active label in its place subregion sends one first microwave signal, includes the tag recognition sign indicating number information and the low frequency base coded information of this active label itself in described first microwave signal; First microwave signal that the described first high frequency base station will receive and the first high frequency base coded of self are superimposed, and send the described second high frequency base station to by one second microwave signal; Low frequency base coded information in second microwave signal that the described second high frequency base station will receive, the first high frequency base coded information and tag recognition sign indicating number information are transmitted to the central controlling platform of described monitoring management system and control utilization.
Preferably, in order to realize commands for controlling and the realization duplex communication to active label, the central controlling platform of described monitoring management system produces a control command according to its described tag recognition sign indicating number information that receives; Described control command returns to the corresponding first high frequency base station by the second high frequency base station; The described first high frequency base station returns active label to correspondence with the control command that receives; Described active label is carried out corresponding action according to described control command.So, can voice broadcast function or the like be set in active label, make things convenient for monitoring management.
This method sends low frequency signal by the low frequency base station to active label, active label just wakes this active label up after receiving described low frequency signal and good authentication, it is just in running order that active label is only entered in the supervision zone, and do not need the transmission received RF data in cycle, thereby reduced the quiescent dissipation of active label.
This method utilizes the low frequency signal scope less but cover sharply marginated characteristics, to supervise the zone and be divided into a plurality of subregions, low frequency base station and high frequency base station are set in each subregion, all there is different coded messages each low frequency base station with the high frequency base station, by being encoded in the different low frequencies base station in the zones of different, can accurately realize the identification location, zone of label.As: after the active label that enters the A subregion is waken up, a-quadrant low frequency base coded information and the tag recognition sign indicating number of itself are passed to the first high frequency base station, after the first high frequency base station receives described tag recognition sign indicating number, self high frequency base coded is superimposed with the tag recognition sign indicating number and sends to the central controlling platform of corresponding monitoring management system by the second high frequency base station, central authorities' controlling platform will be obtained corresponding low frequency base coded information and label information in the signal that receives, promptly know the residing subregion of this label.
For realizing above-mentioned first goal of the invention, the present invention in the narrow supervisory control system of monitoring range the technical scheme that adopts as follows:
A kind of radio-frequency identification method of close limit is applicable to that described supervision scope is smaller or equal to the low frequency coverage that is installed in the low frequency base station in this zone in the monitoring management system of supervision narrow range; At least two first paired high frequency base stations are installed in described supervision scope; The antenna of described each first high frequency base station all is a directional antenna, and each paired directional antenna is towards all opposite; The active label of described low frequency base station in entering its low frequency coverage transmits a low frequency signal, includes the low frequency base coded information of this low frequency base station in described low frequency signal; Described active label is compared the low frequency signal that receives, if the low frequency base coded that prestores with it is complementary, then described active label sends one first microwave signal with mode all first high frequency base stations in the zone of broadcasting, includes the tag recognition sign indicating number information and the low frequency base coded information of this active label itself in described first microwave signal; The high frequency base station information that intensity level detects and adds self is carried out with first microwave signal that receives in the described first high frequency base station, and send the second high frequency base station to by second microwave signal, in described second microwave signal, comprise tag recognition sign indicating number information, the first microwave signal intensity level information and this first high frequency base coded information; Size is carried out relatively to the first microwave signal intensity level that comprises in second microwave signal that receives in the described second high frequency base station, and the central controlling platform that the first high frequency base coded information that comprised in pairing second microwave signal of first microwave signal of intensity level maximum and tag recognition sign indicating number information are transmitted to described monitoring management system is controlled utilization.
Preferably, in order to realize commands for controlling and the realization duplex communication to active label, the central controlling platform of described monitoring management system produces a control command according to its described tag recognition sign indicating number information that receives; Described control command returns to the corresponding first high frequency base station by the second high frequency base station; The described first high frequency base station returns active label to correspondence with the control command that receives; Described active label is carried out corresponding action according to described control command.So, can voice broadcast function or the like be set in active label, make things convenient for monitoring management.
This method sends low frequency signal by the low frequency base station to active label, active label just wakes this active label up after receiving described low frequency signal and good authentication, it is just in running order that active label is only entered in the supervision zone, and do not need the transmission received RF data in cycle, thereby reduced the quiescent dissipation of active label.
Zone location in this method is used for more among a small circle and movement direction of object identification, institute's identified range is covered by the low frequency signal of a low frequency base station, active label is all in running order in this scope, but this scope is distributed with two (or a plurality of) paired high frequency base station, paired high frequency antenna for base station adopts directional antenna and is rightabout and places, active label sends broadcast message continuously by microwave frequency band, because the antenna direction difference of different base station, same bag data for the active label transmission, the strong and weak value of the signal that receive different high frequencies base station is different, strong and weak value is maximum if signal is received in a certain high frequency base station, then care label is nearer apart from this base station, otherwise then far away, thereby reach judgement to the tag motion direction.
Preferably, in order clearly to divide the communication of each sub regions and wide region, the frequency of described low frequency signal is the 125K hertz; The frequency of described first microwave signal and second microwave signal is 2.4 hertz.
For realizing above-mentioned second goal of the invention, the technical solution adopted in the present invention is as follows:
A kind of radio-frequency recognition system, this system comprises low frequency base station, active label, high frequency base station; Described low frequency base station in order to produce a low frequency signal, includes the low frequency base coded information of this low frequency base station in described low frequency signal; Described active label, in order to receive low frequency signal, and described low frequency signal and the low frequency base coded that prestores within it compared, if the two is complementary and then wakes the microprocessor module of this active label up, information interaction is carried out by microwave signal in the high-frequency model and the high frequency base station of described microprocessor module instruction active label; Described high frequency base station in order to receive and to send microwave signal, is transmitted other devices with the information in the microwave signal that receives and is used.
Described low frequency base station comprises first microprocessor chip, high power amplifier and first low-frequency antenna; Described low frequency base station, in order to produce a low frequency signal, specifically: described first microprocessor chip produces a low frequency signal; Described high power amplifier carries out processing and amplifying with described low frequency signal; Described first low-frequency antenna is launched described low frequency signal in the low-frequency electromagnetic wave mode.
Described active label comprises second low-frequency antenna, demodulation filtration module, low frequency identification module, second microprocessor chip, a RF module and first high frequency antenna; Described active label, in order to receive low frequency signal, and described low frequency signal and the low frequency base coded that prestores within it compared, if the two is complementary and then wakes the microprocessor module of this active label up, information interaction is carried out by microwave signal in the high-frequency model and the high frequency base station of described microprocessor module instruction active label, and specifically: described second low-frequency antenna receives low frequency signal and is transferred to the demodulation filtration module; Described demodulation filtration module is separated described low frequency signal and is in harmonious proportion Filtering Processing and is transferred to the low frequency identification module; Described low frequency identification module is compared described low frequency signal and the low frequency base coded information that prestores, if the two coupling then produces an interrupt signal to wake second microprocessor chip up; Described second microprocessor chip instructs a RF module and first high frequency antenna and high frequency base station to carry out information interaction by microwave signal.
Described high frequency base station comprises second high frequency antenna, the 2nd RF module, the 3rd micro treatment module and serial communication modular; Described high frequency base station in order to receive and to send microwave signal, is transmitted other devices with the information in the microwave signal that receives and is used, and specifically: described second high frequency antenna and the 2nd RF module receive and send microwave signal; Described the 3rd microprocessor is controlled the transmitting-receiving of second high frequency antenna and the 2nd RF module, and the information in the microwave signal that receives is transmitted to other devices by serial communication modular uses.
Preferably, described active label also comprises a voice module, and described voice module is connected with described second microprocessor chip.
The present invention adopts low frequency wake-up and Information Authentication technology, and active label only in the low frequency coverage, just carries out HF communication, other times need not work, it has reduced the electric quantity consumption of 99% above time, thereby need not the high capacity cell power supply, and then has effectively reduced the volume of label.
The mode that the present invention adopts low frequency identification and microwave signal intensity to combine, REID has more originally effectively promoted the positioning accuracy to high-speed moving object.
The present invention can realize that the full duplex of data is mutual: utilize the far away and big characteristics of wireless network capacitance of microwave communication distance, can realize on a large scale in, the full duplex data communication of many identifying objects and information centre.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
Fig. 1 is the theory structure schematic diagram of the present invention at the radio-frequency identification method of wide region;
Fig. 2 is the theory structure schematic diagram of the present invention at the radio-frequency identification method of close limit;
Fig. 3 is the structured flowchart of low frequency of the present invention base station;
Fig. 4 is the structured flowchart of high frequency of the present invention base station;
Fig. 5 is the structured flowchart of active label of the present invention;
Fig. 6 is the idiographic flow block diagram of the radio-frequency identification method of wide region of the present invention;
Fig. 7 is the idiographic flow block diagram of the radio-frequency identification method medium and low frequency base station of close limit of the present invention;
Fig. 8 in the radio-frequency identification method of close limit of the present invention with the idiographic flow block diagram of the second high frequency base station;
Fig. 9 is the active label and the first high frequency base station idiographic flow block diagram of the radio-frequency identification method of close limit of the present invention.
Among the figure:
100, low frequency base station 200, active label
300, high frequency base station 310, the first high frequency base station
320, the second high frequency base station
101, first microprocessor chip 102, high power amplifier
103, first low-frequency antenna 104, DC power supply
105, large power supply
201, second low-frequency antenna 202, demodulation filtration module
203, low frequency identification module 204, second microprocessor chip
205, a RF module 206, first high frequency antenna
207, encrypting module 208, voice module
209, power management module
301, second high frequency antenna 302, the 2nd RF module
303, the 3rd microprocessor chip 304, serial communication modular
305, memory module 306, power module
307, encrypting module
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment 1:
Present embodiment discloses a kind of radio-frequency recognition system, this system comprises low frequency base station 100, active label 200, high frequency base station 300, its medium and low frequency base station 100 in order to produce a low frequency signal, includes the low frequency base coded information of this low frequency base station in described low frequency signal; Described active label 200, in order to receive low frequency signal, and described low frequency signal and the low frequency base coded that prestores within it compared, if the two is complementary and then wakes the microprocessor module of this active label up, information interaction is carried out by microwave signal in the high-frequency model and the high frequency base station of described microprocessor module instruction active label; Described high frequency base station 300 in order to receive and to send microwave signal, is transmitted other devices with the information in the microwave signal that receives and is used.
Fig. 3 is a low frequency architecture of base station schematic diagram, as shown in the figure, DC power supply 104 and large power supply 105 dual power supplies are adopted in this base station, master control chip-first microprocessor chip 101 adopts DC power supply 104 power supplies, radio frequency amplifier 102 adopts high-power DC power supply 105 power supplies, to satisfy the requirement of low frequency signal radiant power.Data message is at first microprocessor chip 101, after encryption, coding and modulation, transfer to high power amplifier 102, after high power amplifier 102 amplifies signal, send by first low-frequency antenna, described first low-frequency antenna is 50 ohm of remote low-frequency antennas.
Fig. 4 is the structured flowchart of high frequency of the present invention base station 300, as shown in the figure, the output Vcc of power module 306, ground terminal are connected with operating voltage input Vin, the ground terminal GND of the 3rd microprocessor chip 303 and the 2nd RF module 302 respectively, and sheet choosing end/SS, the data input pin MISO of main control MCU chip-Di three microprocessor chips 303, data output end MOSI, output terminal of clock CLKM are connected with sheet choosing end/SEL, data output end MISO, data input pin MOSI, the input end of clock SCLK of the 2nd RF module respectively; The data communication end of serial communication modular 304 is connected with the serial communication end UART of MCU chip; The data terminal of memory module 305, control end connect respectively at data terminal Data, the storage control end Control of MCU chip.Wherein, MCU chip, RF module, encrypting module also can adopt SOC (system on a chip) Soc to finish.
Fig. 5 is the structural representation of active label 200 of the present invention, this device adopts battery power, and the voltage output end V_Battery of power management module 209 is connected with the operating voltage input Vin_ADC of a RF module 205 operating voltage input Vin and MCU chip-second microprocessor chip 204; The ground terminal GND of power management module is connected with the ground terminal GND of a RF module 205 ground terminal GND and MCU chip; Sheet choosing end/SS, the data input pin MISO of main control MCU, data output end MOSI, output terminal of clock CLKM are connected with sheet choosing end/SEL, data output end MISO, data input pin MOSI, the input end of clock SCLK of a RF module respectively; The IO port Port_IO of MCU chip is connected with the signal output part of low frequency identification module 203; The speech data input of voice module 208, control end connect respectively at data terminal Vic_Data, the storage control end Control of MCU chip.Wherein, MCU chip, RF module, encrypting module also can adopt SOC (system on a chip) Soc to finish.Low frequency signal by separating the mediation filtration module, transfers to the low frequency identification module after receiving by low-frequency antenna, finishes signal authentication and comparison in the low frequency identification module.
Wherein, the PIC18F4620 chip (perhaps PIC18F44K20 chip) that the master control of low frequency base station chip-first microprocessor chip 101 adopts MicroChip company to make; What the RF radio frequency chip of high frequency base station 300, active label 200 was selected for use is the CC2420 chip that TI company makes, and the MCU chip is selected the MSP430 single-chip microcomputer of TI company for use.The MCP2030 chip that active label medium and low frequency identification filtration module adopts MicroChip company to make.Voice module adopts the OSYNO6188 chipspeech of Beijing Yishitongli Smart Communications Technology Co., Ltd.
Embodiment 2:
Fig. 1 only schematically will supervise scope division for two sub regions for the theory structure schematic diagram of the present invention at the radio-frequency identification method of wide region among the figure, need to prove, and can according to the supervision scope division of reality a plurality of subregions; The low frequency base station 100 and the first high frequency base station 310 are installed in each described subregion, the size of described subregion is consistent with the low frequency footprint size of low frequency base station 100 in being installed on this subregion, between the central controlling platform (not shown) of the first high frequency base station 310 and monitoring management system the second high frequency base station 320 is installed.
Below be transfer of data and the interaction flow in this supervision scope:
1, after active label 200 enters in the supervision scope, will receive the low frequency signal that transmit low frequency base station 100, in described low frequency signal, include the low frequency base coded information of this low frequency base station;
2, active label 200 is compared the low frequency signal that receives, if the low frequency base coded that prestores with it is complementary, the first high frequency base station 310 of then described active label 200 in its place subregion sends one first microwave signal, includes the tag recognition sign indicating number information of this active label itself and the low frequency base coded information of coupling in described first microwave signal;
3, the described first high frequency base station 310 is superimposed with the tag recognition sign indicating number and the first high frequency base coded of self that receive, and sends the described second high frequency base station 320 to by one second microwave signal;
4, the central controlling platform (not shown) that is transmitted to described monitoring management system of the first high frequency base coded information, low frequency base coded information and the tag recognition sign indicating number information in second microwave signal that will receive of the described second high frequency base station 320 is controlled utilization;
5, the central controlling platform of described monitoring management system is according to its described tag recognition sign indicating number information that receives, produce a control command, described control command is given the corresponding first high frequency base station 310 by 320 passbacks of the second high frequency base station, the described first high frequency base station 310 returns active label 200 to correspondence with the control command that receives, and described active label 200 is carried out corresponding action according to described control command.
Fig. 6 is the idiographic flow block diagram of the radio-frequency identification method of wide region of the present invention, as shown in the figure:
The process step S1 of low frequency base station 100 is:
Step S1-1: start low frequency base station 100, initiating hardware;
Step S1-2: the command information that needs transmission is read in low frequency base station 100;
Step S1-3: the filter data frame head is added in low frequency base station 100;
Step S1-4: preamble data is added in low frequency base station 100, and information frame is carried out encryption;
Step S1-5: low frequency base station 100 initialization 125KHz carrier waveform generators;
Step S1-6: low frequency base station 100 is modulated to data encrypted package informatin frame on the 125KHz carrier wave;
Step S1-7: low frequency base station 100 sends the 125KHz modulating wave;
After being sent completely, low frequency base station 100 enters regularly sleep, is ready for sending the next frame data;
The operating procedure S2 of the first high frequency base station 310 is:
Step S2-1: start the first high frequency base station 310, initiating hardware and initialization network;
Step S2-2: outstanding message;
Step S2-3: information is from 320, the first high frequency base stations, the second high frequency base station, 310 resolving informations;
Step S2-4: the information after step S2-3 is handled in the first high frequency base station 310 is sent to the label of corresponding receiver address;
Step S2-5: information is added the home base stations coding from active label 200, the first high frequency base stations 310;
Step S2-6: the information after step S2-5 is handled in the first high frequency base station 310 is sent to the second high frequency base station 320, is convenient to the second high frequency base station 320 and handles label information.
The operating procedure S3 of the second high frequency base station 320 is:
Step S3-1: start the second high frequency base station 320, initiating hardware and initialization network;
Step S3-2: wait for the first high frequency base station, 310 information;
Step S3-3: obtain the information that the first high frequency base station 310 sends, the second high frequency base station, 320 resolving informations according to low frequency base station 100 information that active label 200 obtains, are judged label place low frequency region, thus positioning label;
Step S3-4: label information is revised according to the parameter of default in the second high frequency base station 320;
Step S3-5: the information after step S3-4 is handled in the second high frequency base station 320 is sent to the first high frequency base station 310 of uploading label information;
The operating procedure S4 of active label 200 is:
Step S4-1: start active label 200, initiating hardware and initialization network;
Step S4-2: active label 200 enters sleep pattern;
Step S4-3: active label 200 enters the low frequency signal effective coverage range, the packet that low frequency base station 100 sends, through behind low-frequency antenna, demodulation filtering and the low frequency identification module, data transaction becomes digital level pulse train, the IO that triggers active label 200 interrupts, active label 200 reads low-frequency data, carries out the software envelope detection;
Step S4-4: the data after active label 200 is handled step S4-3, carry out carrying out information filtering according to head of packet, extract useful information;
Step S4-5: after the 100 lead code code word verification succeeds of low frequency base station, active label 200 obtains the low frequency base coded by the information that low frequency base station 100 sends, and carries out area code and detects, and obtains active label region information;
Step S4-6: active label 200 is set the high frequency network parameter according to area information;
Step S4-7: active label 200 is sent to self information the first high frequency base station 310 of region;
Step S4-8: active label 200 starts the reception timer, waits for receiving the 310 times photos and sending messages in the first high frequency base station;
Step S4-9: wait for reception information;
Step S4-10: receive the 310 times photos and sending messages in the first high frequency base station, active label 200 is closed the reception timer, and reception information is carried out related resolution and processing;
Step S4-11: in the information after active label 200 is handled step S4-10, obtain voice broadcast information, after synthesizing by digital speech, play voice messaging.
Embodiment 3:
Fig. 2 is applicable in the monitoring management system of supervision narrow range for the theory structure schematic diagram of the present invention at the radio-frequency identification method of close limit.As shown in the figure, described supervision scope is smaller or equal to the low frequency coverage that is installed in the low frequency base station 100 in this zone, at least two first paired high frequency base stations 310 are installed in described supervision scope, need to prove two the paired situations of only schematically having drawn among the figure, certainly the present invention also comprises the situation that how right other are, the antenna of described each first high frequency base station 310 all is a directional antenna, and each directional antenna is towards all opposite.
Below be transfer of data and the interaction flow in this supervision scope:
1, after active label 200 enters into this supervision zone,, in described low frequency signal, includes the low frequency base coded information of this low frequency base station with the low frequency signal that receives from low frequency base station 100;
2, active label 200 is compared the low frequency signal that receives, if the low frequency base coded that prestores with it is complementary, then described active label 200 sends one first microwave signal with mode all first high frequency base stations 310 in the zone of broadcasting, includes the tag recognition sign indicating number information of this active label itself in described first microwave signal;
3, each first high frequency base station 310 first microwave signal that will receive is carried out intensity level and is detected, and adds tag recognition sign indicating number and the high frequency base station information of self, and sends the second high frequency base station 320 to by second microwave signal;
4, the signal strength values of first microwave signal that comprises in each second microwave signal that the second high frequency base station 320 will receive carries out size relatively, and the high frequency base coded information of the first high frequency base station that comprised in pairing second microwave signal of first microwave signal of intensity level maximum and the central controlling platform that tag recognition sign indicating number information is transmitted to described monitoring management system are controlled utilization.
5, the central controlling platform of monitoring management system is according to its described tag recognition sign indicating number information that receives, produce a control command, described control command is given the corresponding first high frequency base station 310 by 320 passbacks of the second high frequency base station, the described first high frequency base station 310 returns active label 200 to correspondence with the control command that receives, and described active label 200 is carried out corresponding action according to described control command.
Fig. 7, Fig. 8 and Fig. 9 are the idiographic flow block diagram of the radio-frequency identification method of close limit of the present invention, as shown in the figure:
In the present embodiment, the process step of low frequency base station 100 is similarly S1:
Step S1-1: start low frequency base station 100, initiating hardware;
Step S1-2: the command information that needs transmission is read in low frequency base station 100;
Step S1-3: the filter data frame head is added in low frequency base station 100;
Step S1-4: preamble data is added in low frequency base station 100, and information frame is carried out encryption;
Step S1-5: low frequency base station 100 initialization 125KHz carrier waveform generators;
Step S1-6: low frequency base station 100 is modulated to data encrypted package informatin frame on the 125KHz carrier wave;
Step S1-7: low frequency base station 100 sends the 125KHz modulating wave;
After being sent completely, low frequency base station 100 enters regularly sleep, is ready for sending the next frame data;
In the present embodiment, the operating procedure of two first high frequency base stations 310 all is S5:
Step S5-1: start the first high frequency base station 310, initiating hardware and initialization network;
Step S5-2: wait for reception information;
Step S5-3: as information from 320, the first high frequency base stations, the second high frequency base station, 310 resolving informations;
Step S5-4:,, information is sent to active label 200 according to the label network address with the information after the S5-3 step process;
Step S5-5: the strong and weak value of signal that detects the packet that receives as information from active label 200, the first high frequency base stations 310;
Step S5-6: local high frequency base coded information is added with the tag recognition sign indicating number information that receives in the first high frequency base station 310;
Step S5-7: the information after step S5-6 is handled in the first high frequency base station is sent to the second high frequency base station 320;
In the present embodiment, the operating procedure S6 of the second high frequency base station 320 is:
Step S6-1: start the second high frequency base station 320, initiating hardware and initialization network;
Step S6-2: wait for reception information;
Step S6-3: receive 2 packets of information from the first high frequency base station 310, the second high frequency base station resolving information bag, obtain from the same bag sequence number of same label, but, include the signal strength values of the same bag data of active label 200 transmissions in this information by the reception of different next stage high frequencies base station from the information of different next stage high frequencies base station;
Step S6-4: 2 different signal strength values that the second high frequency base station 320 obtains after step S6-3 is handled, compare, if in the data from the first high frequency base station 310, the signal strength values of active label 200 is greater than the label signal intensity level from the data of another first high frequency base station 310, then active label 200 these first high frequency base station, 310 antenna surfaces to the zone in, otherwise, then another first high frequency base station, 310 antenna surfaces to the zone in.
Step S6-5: revise label information according to system default parameter, and information is sent to the first bigger high frequency base station 310 of signal strength values among the S6-3;
In the present embodiment, the operating procedure biconditional operation step S4 of active label 200:
Step S4-1: start active label 200, initiating hardware and initialization network;
Step S4-2: active label 200 enters sleep pattern;
Step S4-3: active label 200 enters the low frequency signal effective coverage range, the packet that low frequency base station 100 sends, through behind low-frequency antenna, demodulation filtering and the low frequency identification module, data transaction becomes digital level pulse train, the IO that triggers active label 200 interrupts, active label 200 reads low-frequency data, carries out the software envelope detection;
Step S4-4: the data after active label 200 is handled step S4-3, carry out carrying out information filtering according to head of packet, extract useful information;
Step S4-5: after the 100 lead code code word verification succeeds of low frequency base station, active label 200 obtains the low frequency base coded by the information that low frequency base station 100 sends, and carries out area code and detects, and obtains active label region information;
Step S4-6: active label 200 is set the high frequency network parameter according to area information;
Step S4-7: active label 200 is sent to self information the first high frequency base station 310 of region;
Step S4-8: active label 200 starts the reception timer, waits for receiving the 310 times photos and sending messages in the first high frequency base station;
Step S4-9: wait for reception information;
Step S4-10: receive the 310 times photos and sending messages in the first high frequency base station, active label 200 is closed the reception timer, and reception information is carried out related resolution and processing;
Step S4-11: in the information after active label 200 is handled step S4-10, obtain voice broadcast information, after synthesizing by digital speech, play voice messaging.
Hardware complexity of the present invention is low, volume is little, the mode that adopts 125KHz low frequency and 2.4GHz high-frequency signal to combine in addition, realization is to the wireless long-range radio-frequency identification of active label, the system that is formed has accuracy of identification height, characteristics low in energy consumption, can realize on the one hand can discerning a plurality of electronic tags simultaneously on the other hand to the discerning of high-speed moving object.On function, not only data are can full duplex mutual, and active label can broadcast voice information.
The present invention applies to wireless long-range radio-frequency identification with the double frequency pattern, reduced the label power consumption, effectively reduce the volume of label, and improved the positioning accuracy of label, possessed characteristics simple to operate, that identification accuracy is high, data reliability is high and information privacy is good.
The present invention combines 2.4GHz and 125KHz frequency, increases low frequency identification module and phonetic synthesis module in the active label, utilizes low-frequency technology, activates the label that is in resting state, reduces the active label power consumption.Simultaneously, in conjunction with low frequency signal limited coverage area and sharply marginated characteristics, realize the label area location.Utilize the 2.4GHz frequency range, the strong and weak value of the signal of the label information that the directional antenna of different directions receives is different, realizes the interior among a small circle identification to movement direction of object.Label adopts the speech digit synthetic technology, realizes the voice broadcast of data.
Need explanation to be, above embodiment only illustrates to disclose high frequency 2.4GHz, low frequency 125KHz, the invention is not restricted to this, can also select the high band and the low-frequency range electromagnetic wave of other frequencies for use, mainly be to utilize low-frequency electromagnetic wave to have the characteristics of the less and high-frequency propagation distance of obvious border coverage.
More than the technical scheme that the embodiment of the invention provided is described in detail, used specific case herein the principle and the execution mode of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the radio-frequency identification method of a wide region is applicable in the monitoring management system of supervision wide ranges, it is characterized in that:
With described supervision scope division is at least one subregion, and the low frequency base station and the first high frequency base station are installed in each described subregion;
The size of described subregion is consistent with the low frequency footprint size of low frequency base station in being installed on this subregion;
The second high frequency base station is installed between the central controlling platform of described first high frequency base station and described monitoring management system;
A low frequency signal is transmitted to the active label that enters its subregion in described low frequency base station, includes the low frequency base coded information of this low frequency base station in described low frequency signal;
Described active label is compared the low frequency signal that receives, if the low frequency base coded that prestores with it is complementary, the first high frequency base station of then described active label in its place subregion sends one first microwave signal, includes the tag recognition sign indicating number information and the low frequency base coded information of this active label itself in described first microwave signal;
First microwave signal that the described first high frequency base station will receive and the first high frequency base coded of self are superimposed, and send the described second high frequency base station to by one second microwave signal;
Low frequency base coded information in second microwave signal that the described second high frequency base station will receive, the first high frequency base coded information and tag recognition sign indicating number information are transmitted to the central controlling platform of described monitoring management system and control utilization.
2. the radio-frequency identification method of wide region according to claim 1 is characterized in that:
The central controlling platform of described monitoring management system produces a control command according to its described tag recognition sign indicating number information that receives;
Described control command returns to the corresponding first high frequency base station by the second high frequency base station;
The described first high frequency base station returns active label to correspondence with the control command that receives;
Described active label is carried out corresponding action according to described control command.
3. the radio-frequency identification method of a close limit is applicable in the monitoring management system of supervision narrow range, it is characterized in that:
Described supervision scope is smaller or equal to the low frequency coverage that is installed in the low frequency base station in this zone;
At least two first paired high frequency base stations are installed in described supervision scope;
The antenna of described each first high frequency base station all is a directional antenna, and each paired directional antenna is towards all opposite;
The active label of described low frequency base station in entering its low frequency coverage transmits a low frequency signal, includes the low frequency base coded information of this low frequency base station in described low frequency signal;
Described active label is compared the low frequency signal that receives, if the low frequency base coded that prestores with it is complementary, then described active label sends one first microwave signal with mode all first high frequency base stations in the zone of broadcasting, includes the tag recognition sign indicating number information and the low frequency base coded information of this active label itself in described first microwave signal;
The high frequency base station information that intensity level detects and adds self is carried out with first microwave signal that receives in the described first high frequency base station, and send the second high frequency base station to by second microwave signal, in described second microwave signal, comprise tag recognition sign indicating number information, the first microwave signal intensity level information and this first high frequency base coded information;
Size is carried out relatively to the first microwave signal intensity level that comprises in second microwave signal that receives in the described second high frequency base station, and the central controlling platform that the first high frequency base coded information that comprised in pairing second microwave signal of first microwave signal of intensity level maximum and tag recognition sign indicating number information are transmitted to described monitoring management system is controlled utilization.
4. the radio-frequency identification method of close limit according to claim 3 is characterized in that:
The central controlling platform of described monitoring management system produces a control command according to its described tag recognition sign indicating number information that receives;
Described control command returns to the corresponding first high frequency base station by the second high frequency base station;
The described first high frequency base station returns active label to correspondence with the control command that receives;
Described active label is carried out corresponding action according to described control command.
5. according to each described radio-frequency identification method of claim 1 to 4, it is characterized in that:
The frequency of described low frequency signal is the 125K hertz;
The frequency of described first microwave signal and second microwave signal is the 2.4G hertz.
6. radio-frequency recognition system is characterized in that:
This system comprises low frequency base station, active label, high frequency base station;
Described low frequency base station in order to produce a low frequency signal, includes the low frequency base coded information of this low frequency base station in described low frequency signal;
Described active label, in order to receive low frequency signal, and described low frequency signal and the low frequency base coded that prestores within it compared, if the two is complementary and then wakes the microprocessor module of this active label up, information interaction is carried out by microwave signal in the high-frequency model and the high frequency base station of described microprocessor module instruction active label;
Described high frequency base station in order to receive and to send microwave signal, is transmitted other devices with the information in the microwave signal that receives and is used.
7. radio-frequency recognition system according to claim 6 is characterized in that:
Described low frequency base station comprises first microprocessor chip, high power amplifier and first low-frequency antenna;
Described low frequency base station, in order to produce a low frequency signal, specifically:
Described first microprocessor chip produces a low frequency signal;
Described high power amplifier carries out processing and amplifying with described low frequency signal;
Described first low-frequency antenna is launched described low frequency signal in the low-frequency electromagnetic wave mode.
8. radio-frequency recognition system according to claim 6 is characterized in that:
Described active label comprises second low-frequency antenna, demodulation filtration module, low frequency identification module, second microprocessor chip, a RF module and first high frequency antenna;
Described active label, in order to receive low frequency signal, and described low frequency signal and the low frequency base coded that prestores within it compared, if the two is complementary and then wakes the microprocessor module of this active label up, information interaction is carried out by microwave signal in the high-frequency model and the high frequency base station of described microprocessor module instruction active label, specifically:
Described second low-frequency antenna receives low frequency signal and is transferred to the demodulation filtration module;
Described demodulation filtration module is separated described low frequency signal and is in harmonious proportion Filtering Processing and is transferred to the low frequency identification module;
Described low frequency identification module is compared described low frequency signal and the low frequency base coded information that prestores, if the two coupling then produces an interrupt signal to wake second microprocessor chip up;
Described second microprocessor chip instructs a RF module and first high frequency antenna and high frequency base station to carry out information interaction by microwave signal.
9. radio-frequency recognition system according to claim 8 is characterized in that:
Described active label also comprises a voice module, and described voice module is connected with described second microprocessor chip.
10. radio-frequency recognition system according to claim 6 is characterized in that:
Described high frequency base station comprises second high frequency antenna, the 2nd RF module, the 3rd micro treatment module and serial communication modular;
Described high frequency base station in order to receive and to send microwave signal, is transmitted other devices with the information in the microwave signal that receives and is used, specifically:
Described second high frequency antenna and the 2nd RF module receive and send microwave signal;
Described the 3rd microprocessor is controlled the transmitting-receiving of second high frequency antenna and the 2nd RF module, and the information in the microwave signal that receives is transmitted to other devices by serial communication modular uses.
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| CN110231784A (en) * | 2019-05-06 | 2019-09-13 | 吉林大学 | A kind of intelligence livestock drinking-water management system |
| CN115032624A (en) * | 2022-08-11 | 2022-09-09 | 朗宽半导体有限公司 | Microwave detector for energy-saving lamp and control method thereof |
| CN115032624B (en) * | 2022-08-11 | 2022-12-06 | 朗宽半导体有限公司 | Microwave detector for energy-saving lamp and control method thereof |
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