CN206331457U - A kind of radio-frequency identification reader/writer network based on low pressure light current power line - Google Patents
A kind of radio-frequency identification reader/writer network based on low pressure light current power line Download PDFInfo
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- CN206331457U CN206331457U CN201621176599.5U CN201621176599U CN206331457U CN 206331457 U CN206331457 U CN 206331457U CN 201621176599 U CN201621176599 U CN 201621176599U CN 206331457 U CN206331457 U CN 206331457U
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Abstract
The utility model provides a kind of radio-frequency identification reader/writer network based on low pressure light current power line, and it includes：The radio-frequency identification reader/writer and Communication Control terminal being attached thereto using supply lines；The node and Communication Control terminal of radio-frequency identification reader/writer are respectively equipped with modulation circuit and demodulator circuit.The utility model proposes technical scheme use the radio-frequency identification reader/writer network of low pressure light current power supply wire power supply communication, topological structure is simple, and engineering wiring is convenient, and radio-frequency identification reader/writer hardware interface is simple, equipment plug and play.
Description
Technical field
The utility model is related to field of radio frequency identification, in particular to a kind of radio frequency identification based on low pressure light current power line
Read write line network.
Background technology
In recent years, the wireless chip device that can be wirelessly transferred and receive signal has obtained extensive development.It is this can be wireless
The chip of transmission and reception signal is often referred to as RFID tag RFID (Radio Frequency Identification
Tag) or RF labels, RF chips, wireless identification tag, wireless processor, wireless internal memory, IC label or electronics mark can be referred to as
Label etc..Available radio frequencies recognize label to indicate a variety of articles, to be used as a variety of purposes such as identification, certification or tracking
And purposes.
Radio frequency identification (RFID) is a kind of contactless automatic identification technology, and rfid interrogator passes through antenna and RFID electricity
Subtab carries out radio communication to realize the read or write operation to tag recognition code and internal storage data.
Traditional radio-frequency identification reader/writer is all to be connected to control terminal (such as PC) by single data wire and power line
, to reach the purpose for expanding identification range, general by the way of increase radio-frequency identification reader/writer quantity, its drawback is increase
The quantity of data wire and power line, connects up difficulty, the complexity of connection.
Therefore need to provide a kind of technical scheme to overcome the deficiencies in the prior art.
Utility model content
In order to overcome the drawbacks described above of prior art, the utility model proposes a kind of penetrating based on low pressure light current power line
Frequency identification read write line network, including：The radio-frequency identification reader/writer and Communication Control terminal being respectively connected with therewith using supply lines；Penetrate
The node and Communication Control terminal of frequency identification read write line are respectively equipped with modulation circuit and demodulator circuit.
The modulation circuit of radio-frequency identification reader/writer node includes：Resistance and the field-effect transistor being connected with resistance one end；
The other end of resistance is connected with constant pressure source, the other end ground connection of field-effect transistor.
The demodulator circuit of radio-frequency identification reader/writer node includes：Comparator, resistance, electric capacity and resistance branch；Comparator
Positive terminal is connected with electric capacity and resistance respectively, the other end of electric capacity ground connection, the other end of resistance negative pole end respectively with comparator,
The midpoint of resistance branch and another electric capacity are connected, and the other end of another electric capacity is connected with constant pressure source；
One end ground connection of resistance branch, the other end is connected with constant pressure source.The modulation circuit of Communication Control terminal includes：DC/
DC converters.
The demodulator circuit of Communication Control terminal includes：Comparator, amplifier, current distributing monitor and resistance；Comparator
Positive terminal be connected with the output end of amplifier, the negative pole end of comparator is monitored with the negative pole end and current distributing of amplifier respectively
One end of device is connected, and the positive terminal of amplifier is connected with one end of resistance, another termination reference voltage of resistance；Current distributing is supervised
Control two ends of the another two ends of device respectively with another resistance to be connected, the two ends of another resistance are also connected with constant pressure source respectively.
Radio-frequency identification reader/writer built-in aerial.Antenna is etching/punching press antenna, printed antenna or Wound-rotor type antenna.Constant pressure
Source exports 12V voltages.
With immediate prior art ratio, the technical scheme that the utility model is provided has the advantages that：
1st, the utility model proposes use low pressure light current power supply wire power supply communication radio-frequency identification reader/writer network, topology
Simple in construction, engineering wiring is convenient, and radio-frequency identification reader/writer hardware interface is simple, equipment plug and play.
2nd, RFID antenna of the present utility model makes that the structure of RFID antenna is more simple, simplify production ring
Section, forms the mechanical strength that typical housing design antenna structure also improves RFID antenna.
Brief description of the drawings
Fig. 1 is the basic structure of the utility model read write line network；
Fig. 2 is the modulation circuit figure of the utility model radio frequency identification node；
Fig. 3 is the demodulator circuit figure of the utility model radio frequency identification node；
Fig. 4 is the modulation circuit figure of the utility model Communication Control terminal；
Fig. 5 is the demodulator circuit figure of the utility model Communication Control terminal.
Embodiment
Detection means of the present utility model is described in further detail below in conjunction with the accompanying drawings.
The reading and writing device antenna of radio frequency identification receives the carrier signal sended over from label, is sent to read write line, read write line
Communication Control terminal is sent to after being demodulated to the signal received and carries out relevant treatment.
Antenna is preferably inside antenna, i.e., the antenna is the internal components of rfid interrogator, is integrated in its housing.
Radio-frequency identification reader/writer network as shown in Figure 1 integrally includes radio-frequency identification reader/writer, supply lines and Communication Control
The part of terminal three.
Radio-frequency identification reader/writer node：Each radio-frequency identification reader/writer node only by 2 power lines and is connected to main supply lines
On, each node has complete radio frequency recognition function.
The modulation and demodulation circuit of radio frequency identification node as shown in Figures 2 and 3, its complete on power line the demodulation of signal and
The function of back-modulation, each node completes the function of the back-modulation of signal on power line by way of modulating load current,
Each node read write line has the unique address for being different from other equipment, and the order sent by receiving Communication Control terminal performs tool
Body running, each radio frequency identification node is by the way of time-sharing work, i.e., only address corresponds to correct radio frequency identification node device
Ability response command simultaneously works.
2nd, supply lines：The supply lines is 2 general line power lines, disclosure satisfy that power reguirements, the power line is not
It is only completed the connection between the function of being powered to read write line, or Communication Control terminal and each read write line node.
3rd, Communication Control terminal：Communication Control terminal is connected each node by the low pressure light current supply lines drawn from the terminal
Composition radio-frequency identification reader/writer network together is connected to, it is defeated by modulating while the communicating terminal is powered for each read write line node
Go out the output valve of DC/DC power management chips of the low pressure light current to send the work that control signal controls each node, to power
Exported on line exemplified by 12V voltages, the modulated signal that peak-to-peak value is less than 1V is loaded on 12V signals, send each by this way
Radio frequency identification address of node and control command signal.Communication Control terminal can also demodulate the return of radio-frequency identification reader/writer node
Signal, when radio frequency identification node is receiving order and needing to return, can return to number by way of modulating load current
According to the MCU of Communication Control terminal passes through to a current distributing monitor circuit, signal amplifier circuit and comparator circuit structure
Into the signal of detecting circuit output analyzed, demodulation of the completion to each radio frequency identification node return signal.Communication Control is whole
The data output interface at end can connect such as PC upper computer equipments, and the recognition result of radio-frequency identification reader/writer node is uploaded to
Position generator terminal.
Communication flow：Positive communication on the radio-frequency identification reader/writer network that the low-tension supply line is constituted is supplied by modulating
What piezoelectric voltage was realized, reverse communication is realized by modulating load current.Communication Control terminal is sent to by modulation first
Control command is sent to radio frequency identification node by the supply voltage of radio-frequency identification reader/writer node, and radio frequency identification node passes through demodulation
Useful signal on supply lines then obtains the corresponding command, further determines that the working condition of each radio-frequency identification reader/writer；Radio frequency
The return signal of node is sent to Communication Control terminal by recognition node by way of controlling load current by supply lines, is led to
News control terminal is changed by demodulating current signal on supply lines, reads the return signal of radio frequency identification node, next to determine
Walk work.
In engineering wiring process, 2 lines of general supply line are connected up according to specified region, to be known by each radio frequency
The fixed position of other read write line node and wiring distance are most short to be excellent, when general supply line passes through a radio-frequency identification reader/writer node
When, respectively push 2 line power supply line insulating layers of the general supply line in the region aside one section and expose power supply wire core, each radio frequency identification read-write
Device node draws two power lines, and this two power lines are wound respectively and the exposed power supply wire core of general supply line is connected to, made
Insulation processing is carried out with other instruments, the quick plug on Other Engineering can also be used or the form company of socket is customized
Connect general supply line and each radio frequency identification node.
The utility model proposes the radio frequency that a kind of use low pressure light current power line is powered and communicated for field of radio frequency identification
Read write line network is recognized, the network topology structure is simple, engineering wiring is convenient, and radio-frequency identification reader/writer hardware interface is simple, if
Standby plug and play.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model rather than it is limited
System, although the utility model is described in detail with reference to above-described embodiment, those of ordinary skill in the art are still
Embodiment of the present utility model can be modified or equivalent, these without departing from the utility model spirit and
Any modification of scope or equivalent, are applying within pending claims of the present utility model.
Claims (8)
1. a kind of radio-frequency identification reader/writer network based on low pressure light current power line, including：It is respectively connected with therewith using supply lines
Radio-frequency identification reader/writer and Communication Control terminal；Characterized in that,
The node of the radio-frequency identification reader/writer and the Communication Control terminal are respectively equipped with modulation circuit and demodulator circuit.
2. radio-frequency identification reader/writer network according to claim 1, it is characterised in that the radio-frequency identification reader/writer node
Modulation circuit includes：Resistance and the field-effect transistor being connected with described resistance one end；
The other end of the resistance is connected with constant pressure source, the other end ground connection of the field-effect transistor.
3. radio-frequency identification reader/writer network according to claim 1, it is characterised in that the radio-frequency identification reader/writer node
Demodulator circuit includes：Comparator, resistance, electric capacity and resistance branch；
The positive terminal of the comparator is connected with electric capacity and the resistance respectively, the other end ground connection of the electric capacity, the resistance
Other end negative pole end, the midpoint of the resistance branch and another electric capacity respectively with the comparator be connected, another electricity
The other end of appearance is connected with constant pressure source；
One end ground connection of the resistance branch, the other end is connected with constant pressure source.
4. radio-frequency identification reader/writer network according to claim 1, it is characterised in that the modulation electricity of the Communication Control terminal
Road includes：DC/DC converters.
5. radio-frequency identification reader/writer network according to claim 1, it is characterised in that the demodulation electricity of the Communication Control terminal
Road includes：Comparator, amplifier, current distributing monitor and resistance；
The positive terminal of the comparator is connected with the output end of the amplifier, and the negative pole end of the comparator is put with described respectively
The negative pole end of big device is connected with one end of the current distributing monitor, the positive terminal of the amplifier and one end phase of resistance
Even, another termination reference voltage of the resistance；
Two ends of the another two ends of the current distributing monitor respectively with another resistance are connected, and the two ends of another resistance are also divided
Constant pressure source is not connected with it.
6. radio-frequency identification reader/writer network according to claim 1, it is characterised in that day built in the radio-frequency identification reader/writer
Line.
7. radio-frequency identification reader/writer network according to claim 6, it is characterised in that the antenna be etching/punching press antenna,
Printed antenna or Wound-rotor type antenna.
8. radio-frequency identification reader/writer network according to claim 5, it is characterised in that the constant pressure source exports 12V voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176599.5U CN206331457U (en) | 2016-11-02 | 2016-11-02 | A kind of radio-frequency identification reader/writer network based on low pressure light current power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176599.5U CN206331457U (en) | 2016-11-02 | 2016-11-02 | A kind of radio-frequency identification reader/writer network based on low pressure light current power line |
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| Publication Number | Publication Date |
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| CN206331457U true CN206331457U (en) | 2017-07-14 |
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ID=59286659
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621176599.5U Active CN206331457U (en) | 2016-11-02 | 2016-11-02 | A kind of radio-frequency identification reader/writer network based on low pressure light current power line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994925A (en) * | 2017-11-16 | 2018-05-04 | 浙江晶日照明科技有限公司 | A kind of method by power line communication |
| CN112653444A (en) * | 2020-12-18 | 2021-04-13 | 施镇乾 | Signal transmission circuit, power line and equipment |
-
2016
- 2016-11-02 CN CN201621176599.5U patent/CN206331457U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994925A (en) * | 2017-11-16 | 2018-05-04 | 浙江晶日照明科技有限公司 | A kind of method by power line communication |
| CN107994925B (en) * | 2017-11-16 | 2021-06-22 | 浙江晶日科技股份有限公司 | Method for communication through power line |
| CN112653444A (en) * | 2020-12-18 | 2021-04-13 | 施镇乾 | Signal transmission circuit, power line and equipment |
| CN112653444B (en) * | 2020-12-18 | 2024-05-03 | 施镇乾 | Signal transmission circuit, power line and electronic equipment |
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