RFID location system based on multi-mode communicationTechnical field
The present invention relates to radio frequency identification, more particularly, to a kind of RFID location system based on multi-mode communication.
Background technology
Radio frequency identification (RFID) is a kind of wireless communication technology, by radio signals identification specific objective and can be read and writeRelated data, and without setting up machinery or optical contact between identifying system and specific objective.
The basic functional principle of RFID technique is simultaneously uncomplicated：After label enters magnetic field, the radio frequency letter that plug-in reader sends is receivedNumber, storage product information (passive label or passive tag) in the chips is sent out by the energy that induced-current is obtained,Or the signal (Active Tag, active label or active tag) of a certain frequency is actively sent by label, plug-in reader reads letterAfter ceasing and decoding, delivering to CIS carries out relevant data processing.
Chinese patent CN101957925B discloses a kind of multiple-unit combined antenna array RFID positioning identification systems, including：Rfid interrogator, launches interactive control information；Master controller, one end connection rfid interrogator, the other end is connected one or moreControl unit, master controller receives interactive control information and distribution is transmitted to one or more control unit；One or more antenna arrayRow, are connected with each in one or more control unit；One to multiple antenna, each aerial array is by one to multipleAntenna is constituted, and the control unit is one to multiple antenna assignment transmission power, coordinates the one to multiple antenna, makes the aerial arraySelf adaptation；Read write command signal in control unit transmitting one's respective area, the label in activation one's respective area is received in one's respective areaLabel coding information, transmits to the rfid interrogator.
The content of the invention
It is an object of the invention to provide a kind of RFID location system based on multi-mode communication.
The present invention is provided with aerial array, shunt, main frame and read write line；Covered with each antenna in an antenna arrayRegion be positioning units；The input of shunt is connected with each antenna of aerial array respectively, and main frame passes through channel radioThe mode of letter control shunt connect aerial array in any antenna carry out in the range of tag reader, shunt radio frequency letterThe RF signal input end of number output termination read write line, the rs 232 serial interface signal output end of read write line connects main frame by communication module.
The communication module can be that wired serial communication or wireless serial communicate；The radio communication can be logical using ZigbeeLetter, iBeacon Bluetooth communications, infrared communication, NFC near-field communications, Wi-Fi communication or 4G communications etc..
The positional information of article is carried out communications by the present invention from identity information by different patterns, and the present invention is providedObject alignment system there is features simple structure, multiple reliability, low cost, the efficiency high of communicating the features such as, while to mobile phone, flat board,Various host computers such as computer and other related internet of things equipment can also realize the quick networking extension under different communication protocol.
Brief description of the drawings
Fig. 1 is the structure composition schematic diagram of the embodiment of the present invention.
Specific embodiment
Following examples will the present invention is further illustrated with reference to accompanying drawing.
Referring to Fig. 1, the embodiment of the present invention is provided with aerial array 1, shunt 2, main frame 3 and read write line 4；In aerial array 1In the region that is covered with each antenna as positioning units, numbering is 11,12,13 ... 1n；The input of shunt 2 pointIt is not connected with each antenna of aerial array 1, main frame 3 controls shunt 2 to connect aerial array 1 by way of radio communicationIn any antenna carry out in the range of tag reader, the radiofrequency signal that the RF signal output of shunt 2 connects read write line 4 is defeatedEnter end, the rs 232 serial interface signal output end of read write line 4 connects main frame 3 by communication module.
The communication module can be that wired serial communication or wireless serial communicate；The radio communication can be logical using ZigbeeLetter, iBeacon Bluetooth communications, infrared communication, NFC near-field communications, Wi-Fi communication or 4G communications etc..
The method that the present invention given below implements positioning：
The region covered with each antenna in aerial array 1 as positioning units, numbering is 11,12,13 ...1n, by the region of positioning in need be divided into n region and be named as region 11, region 12, region 13 ... region 1n.
Main frame passes through the side of wireless (Zigbee, iBeacon bluetooth, infrared communication, NFC near-field communications, Wi-Fi, 4G)Formula order shunt 2 connect any antenna carry out in the range of tag reader.
All " tag numbers " and corresponding " antenna number " that antenna reads will be command by and pass to read write line 4, at thisDuring one, tag number data are transmitted from antenna number data using different patterns：
Tag number：After shunt 2 reads tag number to be found, radiofrequency signal is transmitted by wire transmission modeTo read write line 4, after radiofrequency signal is converted into rs 232 serial interface signal by read write line 4, by wired or wireless (Zigbee, iBeacon indigo plantTooth, infrared communication, NFC near-field communications, Wi-Fi, 4G) mode Serial Port Information is transferred to main frame 3.
Antenna number：Namely positional information, antenna number is directly by wireless (Zigbee, iBeacon bluetooth, infraredLine communication, NFC near-field communications, Wi-Fi, 4G) mode be transferred to main frame 3.
Tag number and corresponding antenna number are synchronously incorporated into database, and these data are carried out more according to certain strategyNewly, it is ensured that label position information it is ageing.When article position is inquired about, can be straight by the corresponding tag number of Item TitleConnect the antenna number for finding out response.