CN110516486A - A kind of wireless timesharing RFID terminal of Internet of Things - Google Patents
A kind of wireless timesharing RFID terminal of Internet of Things Download PDFInfo
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- CN110516486A CN110516486A CN201910930832.6A CN201910930832A CN110516486A CN 110516486 A CN110516486 A CN 110516486A CN 201910930832 A CN201910930832 A CN 201910930832A CN 110516486 A CN110516486 A CN 110516486A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
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Abstract
The present invention provides a kind of wireless timesharing RFID terminals of Internet of Things, including power supply unit, transmitting-receiving control unit, radio frequency read-write cell, radio frequency Time-sharing control unit and multiple card reading antennas, wherein: the output port of radio frequency Time-sharing control unit is connected with multiple card reading antennas, and radio frequency Time-sharing control unit is for the successively multiple card reading antennas of momentary actuation；The control port of transmitting-receiving control unit is connected with the control port of radio frequency Time-sharing control unit, and transmitting-receiving control unit is for controlling the radio frequency Time-sharing control unit successively multiple card reading antennas of momentary actuation；First communication port of radio frequency read-write cell is connected with the communication port of transmitting-receiving control unit, and the second communication port of radio frequency read-write cell is connected with the input port of radio frequency Time-sharing control unit, and radio frequency read-write cell is used for the RFID card read and write in card reading antennas.The present invention can multiple RFID cards of fast reading and writing in a short time, accomplish that approximation reads while write multiple RFID cards.
Description
Technical field
The present invention relates to internet of things field, in particular to a kind of wireless timesharing RFID terminal of Internet of Things.
Background technique
RFID is the english abbreviation of radio frequency identification, and RFID of Internet-of-things terminal is a kind of automatic knowledge that can read and write RFID card data
Other equipment, generally includes controller, RFID card reader and antenna, generally further includes wireless module, for interacting with user equipment.
Under normal conditions, it realizes that the information an of RFID card is read, needs a card reader chip and a RFID read-write antenna.Very
More RFID system applications needs multiple RFID cards of short time fast reading and writing.For this purpose, it is common practice to
It has been read and write after a RFID card by a card reader chip and has read and write another RFID card again.The read or write speed of this method depends on
In the speed for changing card, general read or write speed is not high, is unable to satisfy the demand of short time fast reading and writing.
Summary of the invention
Problems solved by the invention is: traditional RFID of Internet-of-things terminal is unable to satisfy multiple RFID of short time fast reading and writing
The demand of card.
To solve the above problems, the present invention provides a kind of wireless timesharing RFID terminal of Internet of Things, including power supply unit, transmitting-receiving
Control unit, radio frequency read-write cell, radio frequency Time-sharing control unit and multiple card reading antennas, it is the transmitting-receiving control unit, described
Radio frequency read-write cell, the radio frequency Time-sharing control unit supply port be connected with said supply unit, in which:
The output port of the radio frequency Time-sharing control unit is connected with multiple card reading antennas, the radio frequency Time-sharing control
Unit is for the successively multiple card reading antennas of momentary actuation；
The control port of the transmitting-receiving control unit is connected with the control port of the radio frequency Time-sharing control unit, the receipts
Hair control unit is for controlling the radio frequency Time-sharing control unit successively multiple card reading antennas of momentary actuation；
First communication port of the radio frequency read-write cell is connected with the communication port of the transmitting-receiving control unit, described to penetrate
Second communication port of frequency read-write cell is connected with the input port of the radio frequency Time-sharing control unit, the radio frequency read-write cell
RFID card for reading and writing in the card reading antennas.
Optionally, the transmitting-receiving control unit is suitable for being wirelessly connected with mobile terminal, is used for the Transmit Receive Unit
The data of the RFID card read are uploaded to the mobile terminal or are write data by the Transmit Receive Unit described
RFID card.
Optionally, the transmitting-receiving control unit includes bluetooth module and Bluetooth antenna module, the end RF of the bluetooth module
Mouth is connected with the Bluetooth antenna module, the first communication ends of the SPI port of the bluetooth module and the radio frequency read-write cell
Mouth is connected, and the control port of the bluetooth module is connected with the control port of the radio frequency Time-sharing control unit.
Optionally, the radio frequency read-write cell includes reading and writing card chip and antenna-matching circuit, the read-write card chip
Communication port is connected with the communication port of the transmitting-receiving control unit, and the serial ports of the read-write card chip is through the antenna match electricity
Road is connected with the input port of the radio frequency Time-sharing control unit.
Optionally, the radio frequency Time-sharing control unit includes mutiple antennas switch chip, multiple duplexer chips
Control port be connected with the control port of the transmitting-receiving control unit, the input port of multiple duplexer chips is equal
Be connected with the second communication port of the radio frequency read-write cell, the output port of multiple duplexer chips with it is multiple described
Card reading antennas respectively corresponds connected.
Optionally, said supply unit includes battery BT3, switching tube Q10, key SW6 and key press detecting circuit, the electricity
The pond BT3 and switching tube Q10 forms current supply circuit, the control of the control terminal and the transmitting-receiving control unit of the switching tube Q10
Port processed is connected and is grounded through the key SW6, and the input terminal of the key press detecting circuit is grounded through the key SW6, described
The output end of key press detecting circuit is connected with the control port of the transmitting-receiving control unit.
Optionally, the key press detecting circuit include power supply VCCT, resistance R45 and diode D6, the power supply VCCT according to
It is secondary through the resistance R45, the diode D6 be grounded, the resistance R45, the diode D6 common end through the key
SW6 ground connection.
Optionally, said supply unit further includes capacitor C83, and the capacitor C83 is in parallel with the key SW6.
Compared with the existing technology, the wireless timesharing RFID terminal of Internet of Things of the present invention has the advantage that
(1) the wireless timesharing RFID terminal of Internet of Things of the present invention can multiple RFID cards of fast reading and writing in a short time,
Accomplish that approximation reads while write multiple RFID cards；
(2) the wireless timesharing RFID terminal of of the present invention Internet of Things can also wirelessly be connected with the mobile terminal of user
Connect, collection control be in communication in one, integrated level with higher, thus the wireless timesharing RFID terminal operating speed of Internet of Things it is fast,
It is more stable；
(3) the wireless timesharing RFID terminal of Internet of Things of the present invention realizes well balanced, the power consumption of cost and function
It is low, practical, it has a vast market foreground and good economic benefit.
Detailed description of the invention
Fig. 1 is the structural block diagram of the wireless timesharing RFID terminal of Internet of Things described in the embodiment of the present invention；
Fig. 2 is another structural block diagram of the wireless timesharing RFID terminal of Internet of Things described in the embodiment of the present invention；
Fig. 3 is the circuit diagram of transmitting-receiving control unit described in the embodiment of the present invention；
Fig. 4 is the circuit diagram of radio frequency read-write cell described in the embodiment of the present invention；
Fig. 5, Fig. 6 are the circuit diagram of radio frequency Time-sharing control unit described in the embodiment of the present invention；
Fig. 7 is the circuit diagram of power supply unit described in the embodiment of the present invention.
Description of symbols:
10- power supply unit；20- transmitting-receiving control unit；201- Bluetooth antenna module；202- bluetooth module；30- radio frequency is read
It writes；301- reads and writes card chip；302- antenna-matching circuit；40- radio frequency Time-sharing control unit；401- duplexer chip；50- is read
Card antenna.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
As shown in Figure 1, its structural block diagram for the wireless timesharing RFID terminal of Internet of Things in the present embodiment；Wherein, the object
Wireless timesharing RFID terminal of networking includes power supply unit 10, transmitting-receiving control unit 20, radio frequency read-write cell 30, radio frequency Time-sharing control
Unit 40 and multiple card reading antennas 50, the transmitting-receiving control unit 20, the radio frequency read-write cell 30, the radio frequency timesharing control
The supply port of unit 40 processed is connected with said supply unit 10, in which:
The output port of the radio frequency Time-sharing control unit 40 is connected with multiple card reading antennas 50, the radio frequency timesharing
Control unit 40 is for the successively multiple card reading antennas 50 of momentary actuation；
The control port of the transmitting-receiving control unit 20 is connected with the control port of the radio frequency Time-sharing control unit 40, institute
Transmitting-receiving control unit 20 is stated for controlling the radio frequency Time-sharing control unit 40 successively multiple card reading antennas 50 of momentary actuation；
First communication port of the radio frequency read-write cell 30 is connected with the communication port of the transmitting-receiving control unit 20, institute
The second communication port for stating radio frequency read-write cell 30 is connected with the input port of the radio frequency Time-sharing control unit 40, the radio frequency
Read-write cell 30 is used for the RFID card read and write in the card reading antennas 50.
Wherein, power supply unit 10 is used to be powered for each component part of system；So-called successively momentary actuation is multiple
Card reading antennas 50 successively activates multiple card reading antennas 50 in a very short period of time, thus realize short time fast reading and writing multiple
The purpose of RFID card.
In the present embodiment, when needing multiple RFID cards of short time fast reading and writing, transmitting-receiving control unit 20 can control radio frequency
The multiple card reading antennas 50 of 40 timesharing momentary actuation of Time-sharing control unit, one card reading antennas 50 of every activation will pass through radio frequency read-write
Unit 30 reads and writes the RFID card in the card reading antennas 50 being activated, thus the successively data of multiple RFID cards of fast reading and writing.Due to
It is high-speed communication between transmitting-receiving control unit 20 and radio frequency Time-sharing control unit 40, can accomplishes that approximation reads while write multiple RFID
Card.
In this way, the wireless timesharing RFID terminal of Internet of Things in the present embodiment can multiple RFID of fast reading and writing in a short time
Card, accomplishes that approximation reads while write multiple RFID cards.
The present embodiment is 4 with the quantity of card reading antennas 50 and is illustrated, but does not form the Internet of Things to the present embodiment
The limitation of wireless timesharing RFID terminal.
Optionally, the transmitting-receiving control unit 20 is suitable for being wirelessly connected with mobile terminal, is used for the radio-frequency receiving-transmitting list
The data for the RFID card that member is read are uploaded to the mobile terminal or write data into institute by the Transmit Receive Unit
State RFID card.
In general, RFID of Internet-of-things terminal is usually attached with mobile terminal device, such as mobile phone, computer, Yong Huke
With easily by mobile terminal transmitting order to lower levels, control RFID of Internet-of-things terminal reads and writes data and the display of RFID card.For convenience
It carries, traditional RFID of Internet-of-things terminal is usually wirelessly connected with mobile terminal, thus traditional RFID of Internet-of-things terminal is usual
Including controller, card reader, antenna and wireless module, controller is respectively set with wireless module.In general, the electricity of discrete setting
Conducting wire connection is needed to carry out signal transmitting between subcomponent, the conducting wire of connection is more, and the speed of signal transmitting is slower.It is i.e. traditional
In RFID of Internet-of-things terminal, controller and wireless module need connecting wire, influence the transmission speed of signal to a certain extent, and
There may be unstable situations for conducting wire connection, lead to equipment fluctuation of service.
In this way, transmitting-receiving control unit 20 can also be with the shifting of user in the wireless timesharing RFID terminal of the Internet of Things of the present embodiment
Dynamic terminal is wirelessly connected, collection control be in communication in one, integrated level with higher, thus the Internet of Things of the present embodiment without
Line timesharing RFID terminal operating speed is fast, more stable.
Optionally, as shown in Fig. 2, the transmitting-receiving control unit 20 includes bluetooth module 202 and Bluetooth antenna module 201,
The port RF of the bluetooth module 202 is connected with the Bluetooth antenna module 201, the SPI port of the bluetooth module 202 and institute
The first communication port for stating radio frequency read-write cell 30 is connected, the control port of the bluetooth module 202 and the radio frequency timesharing control
The control port of unit 40 processed is connected.
Wherein, the SPI port of bluetooth module 202 is the communication port of transmitting-receiving control unit 20, the control of bluetooth module 202
Port processed is the control port of transmitting-receiving control unit 20.Bluetooth module 202 described in the present embodiment is that collection is controlled and is in communication in
The bluetooth module of one, bluetooth module 202 are interacted by Bluetooth antenna module 201 with mobile terminal.
The preferred bluetooth module 202 of the present embodiment be CC2541 Bluetooth chip, Bluetooth antenna module 201 include Bluetooth antenna and
The match circuit of Bluetooth antenna, CC2541 Bluetooth chip are connected through the match circuit of Bluetooth antenna with Bluetooth antenna.Such as Fig. 3 institute
Show, Bluetooth antenna module 201 is common Bluetooth antenna module, and details are not described herein for physical circuit.
CC2541 Bluetooth chip is by the enhanced 8051MCU of the outstanding performance of RF transceiver and an industrywide standard, system
Interior programmable flash memory, 8kBRAM and many other powerful characteristics are together with peripheral combination.As shown in figure 3,
CC2541 Bluetooth chip includes RF_N pin, RF_P pin, P0 series pin and P1 series pin etc., blue in the present embodiment
The port RF of tooth module 202 includes RF_N pin and RF_P pin, and the SPI port of bluetooth module 202 includes in multiple P1 pins
P1_5 pin, P1_6 pin and P1_7 pin, the control port of bluetooth module 202 includes P0_6 pin, P0_7 pin, P1_1
Pin and P1_4 pin.
In this way, the transmitting-receiving control unit 20 of the present embodiment both can control radio frequency Time-sharing control unit 40, successively momentary actuation was more
A RFID card can also realize the wireless communication between customer mobile terminal, to realize collection control and be in communication in one.
Optionally, as shown in Fig. 2, the radio frequency read-write cell 30 includes read-write card chip 301 and antenna-matching circuit
302, the communication port of the read-write card chip 301 is connected with the communication port of the transmitting-receiving control unit 20, the read-write card
The serial ports of chip 301 is connected through the antenna-matching circuit 302 with the input port of the radio frequency Time-sharing control unit 40.
In the present embodiment, the quantity of read-write card chip 301 is one.Wherein, the communication port of read-write card chip 301 is
First communication port of radio frequency read-write cell 30, antenna-matching circuit 302 are connected with 40 input port of radio frequency Time-sharing control unit
Port be radio frequency read-write cell 30 the second communication port.
As shown in figure 4, it is MFRC522 chip that the present embodiment, which preferably reads and writes card chip 301, antenna-matching circuit 302 includes
EMC filter circuit receives circuit and resonance circuit, and antenna-matching circuit 302 is common circuit, and specific structure is herein no longer
It repeats.MFRC522 chip includes D1-D7 pin, VMID pin, TX1 pin, TX2 pin and RX pin etc., reads and writes card chip
301 communication port includes the D5 pin, D6 pin and D7 pin of MFRC522 chip, in which: D5 pin and CC2541 bluetooth
The P1_5 pin of chip is connected, and transmits for SCK_RC signal；D6 pin is connected with the P1_6 pin of CC2541 Bluetooth chip, uses
It is transmitted in MOSI_RC signal；D7 pin is connected with the P1_7 pin of CC2541 Bluetooth chip, transmits for MISO_RC signal.It reads
The serial ports for writing card chip 301 includes the TX1 pin of MFRC522 chip, TX2 pin and RX pin, the TX1 of MFRC522 chip
Pin, TX2 pin are successively connected through EMC filter circuit, resonance circuit with the input port of radio frequency Time-sharing control unit 40, EMC
Filter circuit, resonance circuit the received circuit in common end be connected with the RX pin of MFRC522 chip, TX1 pin, TX2 pin
It is sent for data, RX is used for data receiver.The VMID pin of MFRC522 chip is connected with circuit is received, and draws for generating RX
The biasing of foot input signal.
In this way, the data of the RFID card in the read-write card reading antennas 50 of radio frequency read-write cell 30 of the present embodiment.
Currently, there is also a kind of RFID of Internet-of-things terminals, including controller, a card reader, an antenna to open on the market
It closes and bluetooth is, it can be achieved that read while write multiple RFID cards.Since the function of reading while write multiple RFID cards is more powerful, this is realized
The card reader of function is expensive, is not suitable for general user, can not popularize on a large scale, and power consumption is high.Thus traditional Internet of Things
RFID terminal can not balance cost and function well, often attend to one thing and lose sight of another, it is desirable that read or write speed change will cause it is with high costs,
It is required that low in cost will lose read or write speed.And the wireless timesharing RFID terminal of Internet of Things in the present embodiment only includes a reading
Card chip is write, only once one RFID card of read-write, the optional lower card reading chip of price are guaranteeing closely the function of realizing
While seemingly reading while write multiple RFID card functions, cost is significantly reduced.In cost, it is suitable for general user, is conducive to
It is extensive universal, it is practical；Functionally, it realizing approximation and reads while write multiple RFID cards, read or write speed is high, low in energy consumption,
It is low in energy consumption, practical to which the wireless timesharing RFID terminal of Internet of Things in the present embodiment realizes the well balanced of cost and function
Property is strong, has a vast market foreground and good economic benefit.
Optionally, as shown in Fig. 2, the radio frequency Time-sharing control unit 40 includes mutiple antennas switch chip 401, Duo Gesuo
The control port for stating duplexer chip 401 is connected with the control port of the transmitting-receiving control unit 20, multiple antennas
The input port of switch chip 401 is connected with the second communication port of the radio frequency read-write cell 30, and multiple antennas are opened
The output port for closing chip 401 is respectively corresponded with multiple card reading antennas 50 to be connected.
Wherein, the control port of radio frequency Time-sharing control unit 40 includes the control port of mutiple antennas switch chip 401, is penetrated
The input port of frequency Time-sharing control unit 40 includes the input port of mutiple antennas switch chip 401, radio frequency Time-sharing control unit
40 output port includes the output port of mutiple antennas switch chip 401.
As shown in Figure 5 and Figure 6, the present embodiment preferred antenna switch chip 401 is UPG2214TB chip, UPG2214TB core
The VCONT1 pin of piece, the control port that VCONT2 pin is duplexer chip 401, the IN pin of UPG2214TB chip are
The input pin of duplexer chip 401, OUT1 pin, the OUT2 pin of UPG2214TB chip are duplexer chip 401
Output pin.By taking card reading antennas 50 has 4 as an example, respectively the first card reading antennas, the second card reading antennas, third card reading antennas and
4th card reading antennas, then the UPG2214TB chip in the present embodiment has 4, respectively first switch chip, second switch core
Piece, third switch chip and the 4th switch chip, first switch chip and second switch chip be one group, third switch chip and
4th switch chip is one group, and first switch chip, second switch chip, third switch chip, the 4th switch chip are right respectively
Answer the first card reading antennas, the second card reading antennas, third card reading antennas, the 4th card reading antennas.
As shown in Figure 5 and Figure 6, the IN pin of the IN pin of first switch chip, second switch chip is successively through resonance electricity
Road, EMC filter circuit are connected with the TX2 pin of MFRC522 chip, TX1 pin respectively, and the VCONT2 of first switch chip draws
Foot, second switch chip VCONT2 pin be connected after be connected again with the P0_6 pin of CC2541 Bluetooth chip, first switch core
The VCONT1 pin of piece, second switch chip VCONT1 pin be connected after again with the P0_7 pin phase of CC2541 Bluetooth chip
Even, the OUT2 pin of first switch chip is connected through the first card reading antennas with the OUT2 pin of second switch chip, first switch
The OUT1 pin of chip is connected through the second card reading antennas with the OUT1 pin of second switch chip.The IN of third switch chip draws
Foot, the 4th switch chip IN pin successively through resonance circuit, EMC filter circuit respectively with the TX2 pin of MFRC522 chip,
TX1 pin is connected, the VCONT2 pin of third switch chip, the 4th switch chip VCONT2 pin be connected after again with CC2541
The P1_1 pin of Bluetooth chip is connected, and the VCONT1 pin of third switch chip, the VCONT1 pin of the 4th switch chip are connected
It is connected again with the P1_4 pin of CC2541 Bluetooth chip afterwards, the OUT2 pin of third switch chip is through third card reading antennas and the 4th
The OUT2 pin of switch chip is connected, and the OUT1 pin of third switch chip is through the 4th card reading antennas and the 4th switch chip
OUT1 pin is connected.
In the present embodiment, when needing the RFID card in 4 card reading antennas 50 of fast reading and writing, the control of CC2541 Bluetooth chip
4 UPG2214TB chip timesharing 4 card reading antennas 50 of momentary actuation, as P0_6 pin, the P0_7 of CC2541 Bluetooth chip draw
Foot, P1_1 pin and P1_4 pin are corresponding simultaneously to export " 1 ", " 0 ", " 0 ", " 0 ", then controls first switch chip activation first and read
Card antenna, i.e., the data of the RFID card in read-write first card reading antennas；P0_6 pin, the P0_7 of CC2541 Bluetooth chip immediately
Pin, P1_1 pin and P1_4 pin are corresponding simultaneously to export " 0 ", " 1 ", " 0 ", " 0 ", then controls second switch chip activation second
Card reading antennas, i.e., the data of the RFID card in read-write second card reading antennas；And so on, fast fast reading in the short time can be realized
Write 4 RFID cards.
In this way, the radio frequency Time-sharing control unit 40 of the present embodiment can the multiple card reading antennas 50 of timesharing momentary actuation.
Optionally, as shown in fig. 7, said supply unit 10 includes battery BT3, switching tube Q10, key SW6 and key inspection
Slowdown monitoring circuit, the battery BT3 and the switching tube Q10 form current supply circuit, the control terminal and the transmitting-receiving of the switching tube Q10
The control port of control unit 20 is connected and is grounded through the key SW6, presses described in the input terminal warp of the key press detecting circuit
Key SW6 ground connection, the output end of the key press detecting circuit are connected with the control port of the transmitting-receiving control unit 20.
Wherein, switching tube Q10 is used to control the conducting and shutdown of current supply circuit, and key SW6 is for starting or closing Internet of Things
Wireless timesharing RFID terminal is netted, key press detecting circuit is used to detect the state output detection signal of key SW6, transmitting-receiving control unit
20 for the conducting and shutdown according to the detection Signal-controlled switch pipe Q10.Switching tube Q10 can be metal-oxide-semiconductor, IGBT etc., sheet
Embodiment is illustrated by taking metal-oxide-semiconductor as an example, and the control terminal of switching tube Q10 is the grid of metal-oxide-semiconductor.As shown in figure 3, transmitting-receiving control is single
The control port of member 20 further includes the P0_0 pin and P0_1 pin of CC2541 Bluetooth chip, the grid of P0_0 pin and metal-oxide-semiconductor
It is connected, P0_1 pin is connected with the output end of key press detecting circuit.
In this way, the wireless timesharing RFID terminal of the Internet of Things of the present embodiment can be according to the state control system of user key-press SW6
Open and close, it is more humanized.
Optionally, the transmitting-receiving control unit 20 is also used to detect key SW6 long on time in the key press detecting circuit
Control the switching tube Q10 shutdown.
If according to key, once just control switch pipe Q10 is connected, and then control system is run, it may occur however that user accidentally touched
Situation is unfavorable for the normal operation of system.
In this way, the present embodiment can avoid, there is a situation where user's touch of key-press by accident SW6 to cause system out of service, is conducive to protect
The normal operation of card system.
Optionally, the transmitting-receiving control unit 20 is also used to the delay when the key press detecting circuit detects key one time
Control the switching tube Q10 conducting.
Since system initialization needs the time, if detecting, key SW6 presses soon control switch pipe Q10 conducting, nothing
The normal operation of method guarantee system.
In this way, the present embodiment delays time to control switching tube Q10 when detecting key one time is connected, system is advantageously ensured that
It operates normally, avoids breaking down.
Optionally, described as shown in fig. 7, the key press detecting circuit includes power supply VCCT, resistance R45 and diode D6
Power supply VCCT is successively grounded through the resistance R45, the diode D6, the common end warp of the resistance R45, the diode D6
The key SW6 ground connection.
Wherein, the common end of key SW6 and diode D6 is the input terminal of key press detecting circuit, resistance R45, diode D6
Common end be key press detecting circuit output end.In the present embodiment, when not pressing the button SW6, the P0_ of CC2541 Bluetooth chip
0 pin detects that high level, metal-oxide-semiconductor turn off (metal-oxide-semiconductor can be NOMS at this time), and the P0_1 pin of CC2541 Bluetooth chip keeps low
Level, system are in off-position；If pressing one-touch SW6, the P0_0 pin of CC2541 Bluetooth chip is successively through diode
D6, key SW6 ground connection, CC2541 Bluetooth chip detect a low level, metal-oxide-semiconductor conducting, and system software starting is run, 0.1 second
System software enters normal operation afterwards, and the P0_1 pin of CC2541 Bluetooth chip exports high level, maintains system power supply.Work as long-pressing
When key SW6 (such as 3 seconds), CC2541 Bluetooth chip detects the state of key SW6 long-pressing, CC2541 bluetooth core through P0_0 pin
The P0_1 pin of piece exports low level, closes system power supply, and system is out of service.
In this way, the wireless timesharing RFID terminal of the Internet of Things of the present embodiment control system can stop in user long-pressing key SW6
It only runs, at user key-press one time, delay control system is run.
Optionally, said supply unit 10 further includes capacitor C83, and the capacitor C83 is in parallel with the key SW6.Capacitor
C83 disappears for key SW6 to be trembled.
Optionally, said supply unit 10 further includes level switching circuit, and the level switching circuit accesses the switch
Between the control terminal of pipe Q10 and the control port of the transmitting-receiving control unit 20.
The preferred switching tube Q10 of the present embodiment is PMOS tube, since the P0_1 pin default output of CC2541 Bluetooth chip is low
Level, PMOS tube is low level conducting, to need the low level that P0_1 pin is defaulted to output to be converted into high level, to keep
PMOS tube shutdown, and then keep the off-position of system.
Specifically, as shown in fig. 7, the level switching circuit includes triode Q11, resistance R43 and resistance R44, it is described
The control terminal of switching tube Q10 is grounded through the triode Q11, and the control port of the transmitting-receiving control unit 20 is successively through the electricity
Hinder R43, the resistance R44 ground connection, the resistance R43, the common end of the resistance R44 and the base stage phase of the triode Q11
Even.
Although the disclosure discloses as above, the protection scope of the disclosure is not limited only to this.Those skilled in the art are not
Under the premise of being detached from spirit and scope of the present disclosure, it can make various changes and modify, these changes will fall into this with modification
The protection scope of invention.
Claims (8)
1. a kind of wireless timesharing RFID terminal of Internet of Things, which is characterized in that including power supply unit (10), transmitting-receiving control unit
(20), radio frequency read-write cell (30), radio frequency Time-sharing control unit (40) and multiple card reading antennas (50), the transmitting-receiving control are single
First (20), the radio frequency read-write cell (30), the supply port of the radio frequency Time-sharing control unit (40) are single with the power supply
First (10) are connected, in which:
The output port of the radio frequency Time-sharing control unit (40) is connected with multiple card reading antennas (50), the radio frequency timesharing
Control unit (40) is for the successively multiple card reading antennas (50) of momentary actuation；
The control port of the transmitting-receiving control unit (20) is connected with the control port of the radio frequency Time-sharing control unit (40), institute
Transmitting-receiving control unit (20) are stated for controlling the radio frequency Time-sharing control unit (40) the successively multiple card reading days of momentary actuation
Line (50)；
First communication port of the radio frequency read-write cell (30) is connected with the communication port of the transmitting-receiving control unit (20), institute
The second communication port for stating radio frequency read-write cell (30) is connected with the input port of the radio frequency Time-sharing control unit (40), described
Radio frequency read-write cell (30) is used for the RFID card read and write in the card reading antennas (50).
2. the wireless timesharing RFID terminal of Internet of Things according to claim 1, which is characterized in that the transmitting-receiving control unit
(20) it is suitable for being wirelessly connected with mobile terminal, the data of the RFID card for reading the Transmit Receive Unit are uploaded to
The mobile terminal writes data into the RFID card by the Transmit Receive Unit.
3. the wireless timesharing RFID terminal of Internet of Things according to claim 2, which is characterized in that the transmitting-receiving control unit
It (20) include bluetooth module (202) and Bluetooth antenna module (201), the port RF and the bluetooth of the bluetooth module (202)
Anneta module (201) is connected, and the SPI port of the bluetooth module (202) is communicated with the first of the radio frequency read-write cell (30)
Port is connected, and the control port of the bluetooth module (202) is connected with the control port of the radio frequency Time-sharing control unit (40).
4. the wireless timesharing RFID terminal of Internet of Things according to claim 1 to 3, which is characterized in that the radio frequency read-write
Unit (30) includes read-write card chip (301) and antenna-matching circuit (302), the communication port of read-write card chip (301)
It is connected with the communication port of the transmitting-receiving control unit (20), the serial ports of read-write card chip (301) is through the antenna match
Circuit (302) is connected with the input port of the radio frequency Time-sharing control unit (40).
5. the wireless timesharing RFID terminal of Internet of Things according to claim 1 to 3, which is characterized in that the radio frequency timesharing
Control unit (40) includes mutiple antennas switch chip (401), the control port of multiple duplexer chips (401) with
The control port of the transmitting-receiving control unit (20) is connected, and the input port of multiple duplexer chips (401) is and institute
The second communication port for stating radio frequency read-write cell (30) is connected, the output port of multiple duplexer chips (401) and more
A card reading antennas (50) respectively corresponds connected.
6. the wireless timesharing RFID terminal of Internet of Things according to claim 1 to 3, which is characterized in that said supply unit
It (10) include battery BT3, switching tube Q10, key SW6 and key press detecting circuit, the battery BT3 and the switching tube Q10 group
At current supply circuit, the control terminal of the switching tube Q10 is connected with the control port of the transmitting-receiving control unit (20) and described in passing through
Key SW6 ground connection, the input terminal of the key press detecting circuit are grounded through the key SW6, the output of the key press detecting circuit
End is connected with the control port of the transmitting-receiving control unit (20).
7. the wireless timesharing RFID terminal of Internet of Things according to claim 6, which is characterized in that the key press detecting circuit packet
Power supply VCCT, resistance R45 and diode D6, the power supply VCCT is included successively to be grounded through the resistance R45, the diode D6,
The resistance R45, the diode D6 common end be grounded through the key SW6.
8. the wireless timesharing RFID terminal of Internet of Things according to claim 6, which is characterized in that said supply unit (10) is also
Including capacitor C83, the capacitor C83 is in parallel with the key SW6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910930832.6A CN110516486A (en) | 2019-09-29 | 2019-09-29 | A kind of wireless timesharing RFID terminal of Internet of Things |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910930832.6A CN110516486A (en) | 2019-09-29 | 2019-09-29 | A kind of wireless timesharing RFID terminal of Internet of Things |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113205165A (en) * | 2021-05-06 | 2021-08-03 | 特斯联科技集团有限公司 | Fire-fighting equipment management method and device based on Internet |
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