CN201215662Y - Passive electronic label based on wireless transmission - Google Patents
Passive electronic label based on wireless transmission Download PDFInfo
- Publication number
- CN201215662Y CN201215662Y CNU2008201500828U CN200820150082U CN201215662Y CN 201215662 Y CN201215662 Y CN 201215662Y CN U2008201500828 U CNU2008201500828 U CN U2008201500828U CN 200820150082 U CN200820150082 U CN 200820150082U CN 201215662 Y CN201215662 Y CN 201215662Y
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Abstract
The utility model discloses a passive electronic label based on wireless transmission, which comprises a PIC main control module, a data emitting module, an ID arrangement module and a power supply module, wherein the data emitting module comprises a coil, a first parallel-connected capacitor which is connected with the coil in parallel and a bidirectional analog switch which is connected with the first parallel-connected capacitor in parallel, wherein the bidirectional analog switch is connected with the PIC main control module. The power supply module comprises a full-bridge rectification circuit which is connected with the bidirectional analog switch in parallel, an electrochemical capacitor which is connected with the full-bridge rectification circuit in parallel, a second parallel-connected capacitor which is connected with the electrochemical capacitor in parallel, and a switch and a battery which are connected on two ends of the second parallel-connected capacitor in parallel and are connected in series, wherein the full-bridge rectification circuit is formed by four high-frequency diodes. The ID arrangement module comprises a four-bit dialing switch which is connected with the PIC main control module through a first resistance and is connected with a power supply VCC through a second resistance. The utility model has the advantages of passive power, low power consumption and long service span, which can further modify the ID content of electronic labels.
Description
Technical field
The utility model relates to a kind of electronic tag, relates in particular to a kind of passive electronic label based on wireless transmission.
Technical background
Radio-frequency (RF) identification is a kind of noncontact automatic identification technology, and its is as the new and high technology of fast, in real time, accurately gathering with process information, by universally acknowledged be 21 centurys ten one of big important technologies.The simplest rfid system is made up of label (Tag), reader (Reader) and antenna (Antenna) 3 parts.Its principle of work is: reader sends radiofrequency signal, label utilizes inductive coupling principle or Principles of Radar (Radar Theory after entering electromagnetic field, or BackScatter Theory, be the electromagnetic backscatter principle) send data to reader, reader reads information and decoding and handles.For the design of label, need have characteristics low in energy consumption, that the life-span is long, and in the radio system, by reader label substance being done change is the very big thing of difficulty, will strengthen the complexity of system significantly.
Summary of the invention
The purpose of this utility model is to provide a kind of passive electronic label based on wireless transmission, and it has advantage passive, low in energy consumption, that the life-span is long, volume is little, and can revise the ID content of electronic tag.
The technical scheme that realizes above-mentioned purpose is: a kind of passive electronic label based on wireless transmission, wherein, it comprises that a PIC main control module, the data transmission module and the ID that link to each other with this PIC main control module are provided with module, and a power module that links to each other with described data transmission module, wherein:
Described PIC main control module adopts a single-chip microcomputer;
Described data transmission module comprises a coil L1, the first shunt capacitance C1 in parallel with this coil L1 and the bidirectional analog switch U1A in parallel with this first shunt capacitance C1, and this bidirectional analog switch U1A links to each other with described PIC main control module;
Described power module comprises full bridge rectifier, with full bridge rectifier in parallel electrochemical capacitor C2, with electrochemical capacitor C2 in parallel second a shunt capacitance C3 in parallel with described bidirectional analog switch U1A, and being connected in parallel on a switch S 1 and battery the BT1 second shunt capacitance C3 two ends, that be connected in series, described full bridge rectifier is made of four high-frequency diode D1;
Described ID is provided with module and comprises one 4 toggle switch S2, and this 4-bit DIP switch S2 links to each other with described PIC main control module by four first resistance R 1, also links to each other with power supply VCC by four second resistance R 3.
The above-mentioned passive electronic label based on wireless transmission, wherein, it is the single-chip microcomputer of 1MHz that described PIC main control module adopts passive crystal oscillator, frequency.
The above-mentioned passive electronic label based on wireless transmission, wherein, described coil L1 employing 0.38mm enamel-cover is thread, diameter is that 6.6cm, the number of turns are that 10 coils that enclose are to use as antenna.
The above-mentioned passive electronic label based on wireless transmission, wherein, the described first shunt capacitance C1 is the electric capacity of 20nF.
The beneficial effects of the utility model are: it is the single-chip microcomputer of 1MHz that PIC main control module of the present utility model adopts passive crystal oscillator, frequency, has advantage low in energy consumption, the data transmission module adopts the bidirectional analog switch, have low in energy consumption, speed fast, do not have mechanical contact, volume is little and characteristics such as long service life, ID is provided with in the module, is provided with 4 toggle switchs that are connected with the PIC main control module, by toggle switch label ID is set, realized the modification of label ID content
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
See also Fig. 1, there is shown a kind of passive electronic label of the present utility model based on wireless transmission, it comprises that a PIC main control module 3, the data transmission module 1 and the ID that link to each other with this PIC main control module 3 are provided with module 4, and a power module 2 that links to each other with data transmission module 1, wherein:
It is the single-chip microcomputer of 1MHz that PIC main control module 3 adopts a passive crystal oscillator, frequency, and experiment detects and shows, power consumption had substantial degradation when system power dissipation was than 4MHz during the crystal oscillator of 1MHz;
Data transmission module 1 comprises a coil L1, the first shunt capacitance C1 in parallel with this coil L1 and the bidirectional analog switch U1A in parallel with this first shunt capacitance C1, this bidirectional analog switch U1A links to each other with PIC main control module 3, in the present embodiment, coil L1 adopts that the 0.38mm enamel-cover is thread, diameter be 6.6cm, the number of turns be the coils of 10 circles to use as antenna, the first shunt capacitance C1 is the electric capacity of 20nF;
Power module 2 comprise one with bidirectional analog switch U1A full bridge rectifier in parallel, the electrochemical capacitor C2 in parallel with full bridge rectifier, the second shunt capacitance C3 in parallel with electrochemical capacitor C2, and be connected in parallel on the second shunt capacitance C3 two ends, the switch S 1 and the battery BT1 that are connected in series, full bridge rectifier is made of four high-frequency diode D1, electronic tag of the present utility model is passive mode work, its power supply obtains for electrochemical capacitor C2 charging by the high-frequency signal rectification on the antenna on the data transmission module 1, because carrier frequency is about 600KHz, so rectification must be used high-frequency diode, system utilizes 4 high-frequency diode D1 to connect into a full bridge rectifier, makes full use of the energy that receives on the antenna;
ID is provided with module 4 and comprises one 4 toggle switch S2, and this 4-bit DIP switch S2 links to each other with PIC main control module 3 by four first resistance R 1, also links to each other with power supply VCC by four second resistance R 3.
In the utility model, for the coupling and the mismatch of control antenna, adopted 4066 bidirectional analog switch U1A, it is a CMOS structure chip, in integrated circuit, have 4 independently can control figure and the analog switch that transmits of simulating signal.Each switch has an input end and an output terminal, and they can exchange use, also has a gating end (claiming control end again), when elected go side is high level, and switch conduction; When elected go side was low level, switch ended.During use the gating end be do not allow unsettled.It is a kind of three-stable state circuit, and it can be according to the level of gating end, the state of decision input end and output terminal.When elected go side was in strobe state, the state of output terminal depended on the state of input end; When elected go side is in cut-off state, then no matter the input end level how, output terminal all is high-impedance state.Analog switch mainly plays connection signal or cut-off signal in electronic equipment, have low in energy consumption, speed fast, do not have mechanical contact, volume is little and characteristics such as long service life.
The disposable often programming of the ID of electronic tag cannot be changed at chip internal.Single-chip microcomputer adopts the 16F877 chip, there is the EEPROM of 256 byte lengths inside, its data after power down is not lost, if ID is existed among the EEPROM, just require the reader (not shown) can change the data content of label, and in radio system, by reader label substance being done change is the very big thing of difficulty, will strengthen the complexity of system significantly.So in order to realize the modification of label ID content, the spy has connected 4 toggle switch S2 at one-chip machine port, by toggle switch label ID is set.
Below embodiment has been described in detail the utility model in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the utility model according to the above description.Thereby some details among the embodiment should not constitute qualification of the present utility model, and the scope that the utility model will define with appended claims is as protection domain of the present utility model.
Claims (4)
1. the passive electronic label based on wireless transmission is characterized in that, it comprises that a PIC main control module, the data transmission module and the ID that link to each other with this PIC main control module are provided with module, and a power module that links to each other with described data transmission module, wherein:
Described PIC main control module adopts a single-chip microcomputer;
Described data transmission module comprises a coil L1, the first shunt capacitance C1 in parallel with this coil L1 and the bidirectional analog switch U1A in parallel with this first shunt capacitance C1, and this bidirectional analog switch U1A links to each other with described PIC main control module;
Described power module comprises full bridge rectifier, with full bridge rectifier in parallel electrochemical capacitor C2, with electrochemical capacitor C2 in parallel second a shunt capacitance C3 in parallel with described bidirectional analog switch U1A, and being connected in parallel on a switch S 1 and battery the BT1 second shunt capacitance C3 two ends, that be connected in series, described full bridge rectifier is made of four high-frequency diode D1;
Described ID is provided with module and comprises one 4 toggle switch S2, and this 4-bit DIP switch S2 links to each other with described PIC main control module by four first resistance R 1, also links to each other with power supply VCC by four second resistance R 3.
2. the passive electronic label based on wireless transmission according to claim 1 is characterized in that, it is the single-chip microcomputer of 1MHz that described PIC main control module adopts passive crystal oscillator, frequency.
3. the passive electronic label based on wireless transmission according to claim 1 is characterized in that, described coil L1 employing 0.38mm enamel-cover is thread, diameter is that 6.6cm, the number of turns are that 10 coils that enclose are to use as antenna.
4. according to claim 1 or 3 described passive electronic labels, it is characterized in that the described first shunt capacitance C1 is the electric capacity of 20nF based on wireless transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201500828U CN201215662Y (en) | 2008-06-26 | 2008-06-26 | Passive electronic label based on wireless transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201500828U CN201215662Y (en) | 2008-06-26 | 2008-06-26 | Passive electronic label based on wireless transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201215662Y true CN201215662Y (en) | 2009-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201500828U Expired - Fee Related CN201215662Y (en) | 2008-06-26 | 2008-06-26 | Passive electronic label based on wireless transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201215662Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639964B (en) * | 2009-08-31 | 2012-05-30 | 华南农业大学 | RF-based portable goods theft-proof and alarm system and control method thereof |
| CN108054809A (en) * | 2018-01-23 | 2018-05-18 | 北京今日天鸿医疗器械制造有限公司 | Wireless charging circuit based on electronic tag |
-
2008
- 2008-06-26 CN CNU2008201500828U patent/CN201215662Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639964B (en) * | 2009-08-31 | 2012-05-30 | 华南农业大学 | RF-based portable goods theft-proof and alarm system and control method thereof |
| CN108054809A (en) * | 2018-01-23 | 2018-05-18 | 北京今日天鸿医疗器械制造有限公司 | Wireless charging circuit based on electronic tag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090401 Termination date: 20100626 |