CN105160389A - Passive ultrahigh-frequency RFID tag for temperature alarming - Google Patents
Passive ultrahigh-frequency RFID tag for temperature alarming Download PDFInfo
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- CN105160389A CN105160389A CN201510624873.4A CN201510624873A CN105160389A CN 105160389 A CN105160389 A CN 105160389A CN 201510624873 A CN201510624873 A CN 201510624873A CN 105160389 A CN105160389 A CN 105160389A
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Abstract
The invention discloses a passive ultrahigh-frequency RFID tag for temperature alarming. The tag comprises a tag chip and a tag antenna connected with the tag chip, wherein the tag chip comprises a radio-frequency analog front-end unit, a logic control unit and a storage unit, which are connected in sequence. The radio-frequency analog front-end unit is connected with a power supply module, an impedance matching network module, a demodulation module and a modulation module of the logic control unit. The impedance matching network module comprises a first capacitor, a second capacitor, a first PMOS switch transistor, a second PMOS switch transistor and a barium titanate thermistor. The first capacitor and the second capacitor are connected in parallel between the tag antenna and the ground; and the gates of the first PMOS switch transistor and the second PMOS switch transistor are connected in series with the barium titanate thermistor and then are connected to the power supply module, the drains of the first PMOS switch transistor and the second PMOS switch transistor are connected to the signal feed-in end of the tag antenna, and the sources of the first PMOS switch transistor and the second PMOS switch transistor are grounded.
Description
Technical field
The present invention relates to a kind of passive ultra-high frequency RFID label for temperature alarming.
Background technology
RFID(RadioFrequencyIdentification, radio frequency identification) application of technology is increasingly extensive, and according to the needs of different applications and actual environment, radio frequency identification electronic tag itself it is also proposed much concrete requirement.In Application in Anti-counterfeiting, label is generally needed to have uniqueness, stability, safe handling time and be imitated the requirements such as difficulty.Electronic tag can have globally unique coding, and unique encodings can not be modified.Carry out false proof with electronic tag, have be imitated difficulty high, be imitated the features such as cost is high, the time that is imitated is long, be the excellent carrier of Application in Anti-counterfeiting.
RFID conventional at present comprises low frequency (LF) electronic tag, high frequency (HF) electronic tag and ultrahigh frequency (UHF) electronic tag etc.Because frequency is low, low-frequency electronic labeling requirement just can make resonant tag in frequency of operation around much fine coil on iron core, makes the cost of label higher; The frequency of operation of ultra high frequency IC tag improves, resonant tag is greatly reduced in the label antenna number of turns required for frequency of operation, aluminium etching technique can be adopted to process label, if but because one side coil welding chip will cause the short circuit of coil, so can only adopt two-sided aluminium etching technique, the processing cost of label is still higher.Ultrahigh frequency electronic tag due to its frequency of operation relatively high, its label can adopt one side antenna to realize, and cost has been significantly less than first two electronic tag, but compared with traditional antiforge, the price of electronic tag or higher, greatly constrains the application of electronic tag.
The price of electronic tag forms primarily of three parts, comprising: label antenna, label chip and chip bonding.For ultrahigh frequency electronic tag, antenna price is in several magnitude of sharing money, and its decline space is very limited, and the price of chip bonding also tends towards stability, only has the price of label chip itself to also have the space declined.
Summary of the invention
Goal of the invention: for above-mentioned prior art, proposes a kind of passive ultra-high frequency RFID label for temperature alarming, can utilize RFID tag reading performance at different temperatures, thus realize remote temperature alarming.
Technical scheme: a kind of passive ultra-high frequency RFID label for temperature alarming, the label antenna that this label comprises label chip, is connected with label chip; Described label chip comprises the rf analog front-end unit, logic control element, the storage unit that connect successively; Described rf analog front-end unit comprises the supply module, impedance matching network module, demodulation module and the modulation module that connect described logic control element respectively; Wherein said impedance matching network module comprises the first electric capacity, the second electric capacity, the first PMOS switch pipe, the second PMOS switch pipe, and barium titanate series thermistor; Described first electric capacity, the second Capacitance parallel connection are between described label antenna and ground; After barium titanate series thermistor described in the gate series of described first PMOS switch pipe and the second PMOS switch pipe, be connected to described supply module, the drain electrode of the first PMOS switch pipe and the second PMOS switch pipe is connected to the signal feed side of described label antenna, the source ground of the first PMOS switch pipe and the second PMOS switch pipe.
As preferred version of the present invention, described storage unit is 32 EEPROM being.
Beneficial effect: a kind of passive ultra-high frequency RFID label for temperature alarming of the present invention, is connected on certain temperature range internal impedance between the impedance matching network module of rf analog front-end unit and supply module and changes violent barium titanate series thermistor in label chip.The UHFRFID reader of standard is utilized to read this label at a distance, when temperature is in outside fence coverage, label is in impedance mismatching state, read write line cannot read label, when device temperature enters within fence coverage, label impedance matching is good, and read write line can read label, so just achieves label temperature alarming.
Accompanying drawing explanation
Fig. 1 is target label chip structure schematic diagram of the present invention;
Fig. 2 is impedance matching network function structure chart.
Embodiment
Below in conjunction with accompanying drawing the present invention done and further explain.
As shown in Figure 1, a kind of passive ultra-high frequency RFID label for temperature alarming, the label antenna that this label comprises label chip, is connected with label chip.Label chip comprises the rf analog front-end unit, logic control element, the storage unit that connect successively.Rf analog front-end unit comprises the supply module, impedance matching network module, demodulation module and the modulation module that connect logic control element respectively.Wherein, impedance matching network module comprises the first electric capacity, the second electric capacity, the first PMOS switch pipe, the second PMOS switch pipe, and barium titanate series thermistor.First electric capacity, the second Capacitance parallel connection are between label antenna and ground; After the gate series barium titanate series thermistor of the first PMOS switch pipe and the second PMOS switch pipe, be connected to described supply module; The drain electrode of the first PMOS switch pipe and the second PMOS switch pipe is connected to the signal feed side of label antenna, the source ground of the first PMOS switch pipe and the second PMOS switch pipe.
This storage unit is 32 EEPROM being.
As described in Figure 2, impedance matching network is made up of CCM electric capacity, K switch 1 and barium titanate series thermistor.In order to ensure the symmetry of circuit between two antenna leads, adopt the form of two Capacitance parallel connections.K1 is made up of two PMOS switch pipes, and PMOS passes through supply module rear drive by baseband signal after connecting barium titanate series thermistor, and therefore the grid of PMOS can obtain higher grid voltage, ensures that off state reliably ends.
Principle of work is as follows: when passive ultra-high frequency RFID label of the present invention is within the scope of the electromagnetic field of reader, passive electronic label obtains energy by electromagnetic field couples, utilizes supply module to change interchange into direct current, powers to other modules inner.Label chip demodulates instruction and data by demodulation module from radio-frequency pulse, and delivers to logic control element.Logic control element carries out a series of data manipulation according to the instruction received.Label is by controlling the impedance matching circuit be connected with label antenna, thus the reflection coefficient changing antennal interface is modulated data-signal.In label chip, be connected on certain temperature range internal impedance between the impedance matching network module of rf analog front-end unit and supply module change violent barium titanate series thermistor.The UHFRFID reader of standard is utilized to read this label at a distance, when temperature is in outside fence coverage, label is in impedance mismatching state, read write line cannot read label, when device temperature enters within fence coverage, label impedance matching is good, and read write line can read label, so just achieves label temperature alarming.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. for a passive ultra-high frequency RFID label for temperature alarming, it is characterized in that: the label antenna that this label comprises label chip, is connected with label chip; Described label chip comprises the rf analog front-end unit, logic control element, the storage unit that connect successively; Described rf analog front-end unit comprises the supply module, impedance matching network module, demodulation module and the modulation module that connect described logic control element respectively; Wherein said impedance matching network module comprises the first electric capacity, the second electric capacity, the first PMOS switch pipe, the second PMOS switch pipe, and barium titanate series thermistor; Described first electric capacity, the second Capacitance parallel connection are between described label antenna and ground; After barium titanate series thermistor described in the gate series of described first PMOS switch pipe and the second PMOS switch pipe, be connected to described supply module, the drain electrode of the first PMOS switch pipe and the second PMOS switch pipe is connected to the signal feed side of described label antenna, the source ground of the first PMOS switch pipe and the second PMOS switch pipe.
2. a kind of passive ultra-high frequency RFID label for temperature alarming according to claim 1, is characterized in that: described storage unit is 32 EEPROM being.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510624873.4A CN105160389A (en) | 2015-09-25 | 2015-09-25 | Passive ultrahigh-frequency RFID tag for temperature alarming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510624873.4A CN105160389A (en) | 2015-09-25 | 2015-09-25 | Passive ultrahigh-frequency RFID tag for temperature alarming |
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| CN105160389A true CN105160389A (en) | 2015-12-16 |
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| CN201510624873.4A Pending CN105160389A (en) | 2015-09-25 | 2015-09-25 | Passive ultrahigh-frequency RFID tag for temperature alarming |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727251A (en) * | 2016-08-10 | 2018-02-23 | 施耐德电器工业公司 | Wireless temperature measuring device, wireless temperature measurement system and method |
| CN108320014A (en) * | 2018-04-11 | 2018-07-24 | 上海诚意电气有限公司 | Passive RFID tag, fuse switch device and its monitoring system |
| CN108985416A (en) * | 2018-09-28 | 2018-12-11 | 郑州轻工业学院 | A kind of woven fabric production traceability system and method based on RFID |
| CN108985417A (en) * | 2018-09-28 | 2018-12-11 | 郑州轻工业学院 | A kind of spool traceability system and method based on RFID |
| CN109034321A (en) * | 2018-09-28 | 2018-12-18 | 郑州轻工业学院 | A kind of rove chain transmission traceability system and method based on RFID |
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| CN203386226U (en) * | 2013-06-26 | 2014-01-08 | 南京三宝科技股份有限公司 | Low-cost RFID tag chip |
| JP2014027513A (en) * | 2012-07-27 | 2014-02-06 | Kyocera Corp | Radio communication device, and correction method for resonance frequency in the same |
| CN103699927A (en) * | 2013-12-13 | 2014-04-02 | 电子科技大学 | Passive ultrahigh frequency RFID (radio frequency identification) label chip with temperature sensing function |
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- 2015-09-25 CN CN201510624873.4A patent/CN105160389A/en active Pending
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| CN201892966U (en) * | 2010-05-12 | 2011-07-06 | 上海华申泰格软件有限公司 | Intelligent temperature sensing tag |
| JP2014027513A (en) * | 2012-07-27 | 2014-02-06 | Kyocera Corp | Radio communication device, and correction method for resonance frequency in the same |
| CN203386226U (en) * | 2013-06-26 | 2014-01-08 | 南京三宝科技股份有限公司 | Low-cost RFID tag chip |
| CN103699927A (en) * | 2013-12-13 | 2014-04-02 | 电子科技大学 | Passive ultrahigh frequency RFID (radio frequency identification) label chip with temperature sensing function |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727251A (en) * | 2016-08-10 | 2018-02-23 | 施耐德电器工业公司 | Wireless temperature measuring device, wireless temperature measurement system and method |
| CN107727251B (en) * | 2016-08-10 | 2019-11-29 | 施耐德电器工业公司 | Wireless temperature measuring device, wireless temperature measurement system and method |
| CN108320014A (en) * | 2018-04-11 | 2018-07-24 | 上海诚意电气有限公司 | Passive RFID tag, fuse switch device and its monitoring system |
| CN108320014B (en) * | 2018-04-11 | 2024-01-05 | 上海诚意电气有限公司 | Passive radio frequency identification tag, drop-out fuse device and monitoring system thereof |
| CN108985416A (en) * | 2018-09-28 | 2018-12-11 | 郑州轻工业学院 | A kind of woven fabric production traceability system and method based on RFID |
| CN108985417A (en) * | 2018-09-28 | 2018-12-11 | 郑州轻工业学院 | A kind of spool traceability system and method based on RFID |
| CN109034321A (en) * | 2018-09-28 | 2018-12-18 | 郑州轻工业学院 | A kind of rove chain transmission traceability system and method based on RFID |
| CN108985417B (en) * | 2018-09-28 | 2024-02-20 | 郑州轻工业学院 | Bobbin tracing system and method based on RFID |
| CN108985416B (en) * | 2018-09-28 | 2024-02-20 | 郑州轻工业学院 | RFID-based fabric production traceability system and method |
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