A kind of active RFID record card device based on bluetoothTechnical field
The invention belongs to radio frequency identification and internet of things field, especially a kind of active RFID record card based on bluetoothDevice.
Background technology
As the RFID system in support RFID Internet of things system big datas source, importance is unquestionable.Complete setRFID system is made of reader (Reader) and two part of electronic tag (Transponder), and operation principle is by reading and writingDevice (Reader) emits the radio wave energy electron label (Transponder) of a specific frequency, to drive electronics markIt signs (Transponder) circuit to send out the ID Code (i.e. global unique number and data) in Inner portions, at this time reader(Reader) this ID Code is just received.The special of electronic tag (Transponder) is battery-free, contact-free, exempts to swipe the cardTherefore it is not afraid of the dirty, long-life, and chip password can not uniquely be replicated for the world, safe anti-counterfeiting technology is strong.
At present RFID be widely used it is general, typically, such as be applied to member card, mass transit card, the care of animal, food and medicineIt is anti-fake trace to the source, parking lot and charge, access control and attendance, the inspection of power equipment assets, production line automation, the necks such as handling of goods and materials at a high speedDomain.
RFID label tag includes active label and passive label.Passive electronic label refers to that inside tags do not have battery, workThe electromagnetic field that reader transmitting is both needed to as energy provides, light-weight, small, long lifespan, at low cost, can be made into various cardsIt identifies that distance is smaller than active system, generally several meters to more than ten meters, and needs larger reader transmission power.It is activeElectronic tag is powered by the battery of inside tags, is not needed to reader and is provided energy to start, label can actively emitElectromagnetic signal, identification distance is longer, usually up to tens meters or even rice up to a hundred.
Active RFID application field is also expanded constantly at present, is such as applied to City-level electric vehicle anti-theft, family school leads to, endangersChange in the industries such as quality control reason；In general, a regional active RFID tag terminal usage amount is often up to a hundred for hundreds of thousands Zhang NaizhiTen thousand, quantity radix is very huge.And active RFID tag installation and provide point position it is then often more dispersed, and put position compared withMore, each installation point position present position possesses resource situation and differs, and unit of operation can not possibly be a large amount of in the installation point position set up temporarilyThe portable devices such as laptop are put into, existing wired record card apparatus can not be used, and use manual entry mode, this sideUnavoidably there is the problem of wrong typing in formula, and the calibration article or people for causing mistake typing can not be serviced normally, thisIt is reversed in that unit of operation is forced to be accepted or rejected between efficiency of inputting, typing accuracy rate and cost input.
With the continuous development of internet, smart mobile phone is already popularized as personal communication tool, and performance is strongGreatly, many terminal traffics are carried out on personal terminal and are possibly realized.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of active RFIDs based on bluetooth to record card device, shouldBy the use of portable intelligent mobile terminal as system copying platform, connect bluetooth MCU automatic identifications by bluetooth approach has deviceThe card number information of source RFID simultaneously automatically enters in the corresponding input frame of portable intelligent mobile terminal, completes the record of label card numberEnter, unit of operation by using the present invention can low cost, high efficiency, complete to high-accuracy RFID card typing work.
To achieve these goals, the technical solution adopted by the present invention is：A kind of active RFID record based on bluetooth clampsIt puts, it is characterised in that：Including the bluetooth MCU being connect with intelligent mobile terminal by bluetooth approach, multi-protocols built in bluetooth MCUThe 2.4G radio-frequency front-ends of support, bluetooth MCU are connected with the 2.4G plates as Bluetooth signal transmitting-receiving and active RFID tag readingPCB antenna is carried, bluetooth MCU is also associated with the power supply module for its power supply, and bluetooth MCU is connected with acousto-optic hint unit, power supply groupPart is connect with acousto-optic hint unit.
Further, the power supply module includes lithium battery and is charged for lithium battery and indicate charging/full of shapeThe Charge Management unit of state, lithium battery complete lithium battery by DC/DC chips and press to the conversion of bluetooth MCU operating voltages.
Further, the bluetooth MCU is connect using BLE bluetooth HID protocols with intelligent mobile terminal.
Further, the bluetooth MCU is connected with acousto-optic hint unit, and power supply module is connect with acousto-optic hint unit, soundLight prompt unit include respectively with bluetooth MCU buzzers connect and LED light, the LED light include low electricity indication LED lamp group,Typing indication LED lamp group and typing keep indication LED lamp group.
Further, the bluetooth MCU by the setting of RSSI threshold values to form tag recognition area, label leaves area, withAnd signal hysteresis area between area is left positioned at tag recognition area and label.
The advantageous effect brought of the technical solution being related to of the present invention is：The bluetooth active RFID record card device of the present invention,Its entire technical solution uses only a 2.4G Bluetooth chip, and the bluetooth mould with intelligent mobile terminal is completed by protocol scheduleThe switching of block, active RFID tag proprietary protocol reduces penetrating for active RFID reading relative to conventional record card deviceFrequency partial circuit has cost advantage；In addition, can solve the next limitation of cross bars using BLE bluetooths, what is be greatly improved setsThe standby convenience used and hair fastener efficiency, can be completed hair fastener business using only personal smart mobile phone, are brought to unit of operationNew solution reduces cost input；In addition, the device is by the use of portable intelligent mobile terminal as system copying platform,Connecting bluetooth MCU by bluetooth approach makes the card number information of its automatic identification active RFID, and the card number letter for identifying itBreath is jumped out automatically in the corresponding input frame of portable intelligent mobile terminal, completes label card number typing, solves the prior artIn manual identified be manually entered the caused low problem of typing accuracy rate again.
The invention will be further described below in conjunction with the accompanying drawings.
Description of the drawings
Attached drawing 1 is specific embodiment of the invention structure diagram.
Specific embodiment
Specific embodiments of the present invention be as shown in Figure 1 based on bluetooth active RFID record card device, including with intelligenceThe bluetooth MCU that mobile terminal is connected by bluetooth approach, the intelligent mobile terminal such as portable intelligents such as tablet computer, personal mobile phoneMobile terminal；The onboard PCB antennas of bluetooth MCU connection 2.4G read for Bluetooth signal transmitting-receiving and active RFID tag and use；The indigo plantTooth MCU can be used nordic NRF51 or NRF52 series Bluetooth chips, the 2.4G radio-frequency front-ends of built-in multi protocol supporting,Scheduling the privately owned active RFID protocols of 2.4G can be supported while keeping with intelligent mobile terminal bluetooth connection, it is multiple during schedulingActive 2.4G RFID label tags are completed with bluetooth 2.4G radio-frequency front-ends to read, RFID label tag is mostly using one packet of at least hair per second at presentFrequency carry out signal transmission, therefore dispatch keep 2.4G active RFIDs read access time at least more than 1s, with ensure stablize read.
Above-mentioned bluetooth MCU is also associated with the power supply module for its power supply, and bluetooth MCU is connected with acousto-optic hint unit, power supplyComponent is connect with acousto-optic hint unit.Power supply module includes lithium battery and is charged for lithium battery and indicate to charge/be full ofThe Charge Management unit of state, Charge Management unit use TP4055 chips, and lithium battery (is specifically by DC/DC chipsXC6206 chips) lithium battery 4.2V voltages are completed to bluetooth MCU operating voltages 3.3V conversions.
Above-mentioned bluetooth MCU is connect with intelligent mobile terminal using BLE bluetooths HID protocol in automatic identification RFID label tagCard number information and the card number information that identifies is jumped out automatically in the input frame of intelligent mobile terminal, for typing.
Above-mentioned bluetooth MCU by the setting of RSSI threshold values to form tag recognition area, label leaves area and positioned at labelCog region and label leave the signal hysteresis area between area, set the signal strength threshold for entering tag recognition area in the present embodimentBe set to -44dBm, and will be far from label and leave the signal strength threshold in area being set as -53dBm, and -44dBm and -53dBm itBetween region be signal hysteresis area.
Above-mentioned acousto-optic hint unit include respectively with bluetooth MCU buzzers connect and LED light, LED light include low electricity LEDLamp group, typing LED light group and typing keep LED light group；It is less than when bluetooth MCU collects lithium battery voltage by its internal ADCDuring 3.6V, triggering buzzer, which yowls 3 seconds and lights low electric LED light group, completes low electricity instruction；When active RFID tag first enters500 milliseconds of buzzer buzzing is triggered during tag recognition area and typing LED light group flickers and is used to indicate within 1 second typing success；Typing intoAfter work(, active RFID tag does not leave, then triggers and LED light group is kept to be always on, and instruction enters typing hold mode.Pass through above-mentioned sideFormula, acousto-optic hint unit complete low electricity instruction, typing instruction and typing and keep instruction function.
Typing step is as follows：
1. mobile phone connects bluetooth active RFID by bluetooth module and records card device；
2. active RFID tag is recorded card device close to bluetooth active RFID, bluetooth active RFID records card device according to RSSIWhether signal strength identification RFID label tag enters tag recognition area, is -44dBm into detection signal strength threshold, if having been enter intoTag recognition area, mobile phone then by bluetooth HID protocol by the serial number or card number information that were originally stored on active RFID tag fromIt is dynamic to identify, and the card number information automatically identified is jumped out automatically in the input frame of the corresponding APP of mobile phone, mobile phoneAPP is transmitted with system by 4G network connections, so as to complete serial number typing work, and triggers acousto-optic hint typing success；
3. switch to hysteresis hold mode after label typing, triggering typing hold mode instruction reads label sequence number during thisCarry out data filtering；
After 4. label leaves area far from label, it is -53dBm to leave detection signal detection intensity threshold, closes hold modeInstruction, and can trigger secondary typing operation.
The present invention is not limited to above-mentioned specific embodiment, and persons skilled in the art are according to disclosed by the invention interiorHold, other a variety of specific embodiments may be used and implement of the invention or every design structure using the present invention and think ofRoad does simple change or change, both falls within protection scope of the present invention.