CN102915456A - Simple radio frequency identification devices (RFID) sensing device - Google Patents
Simple radio frequency identification devices (RFID) sensing device Download PDFInfo
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- CN102915456A CN102915456A CN2012103263372A CN201210326337A CN102915456A CN 102915456 A CN102915456 A CN 102915456A CN 2012103263372 A CN2012103263372 A CN 2012103263372A CN 201210326337 A CN201210326337 A CN 201210326337A CN 102915456 A CN102915456 A CN 102915456A
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Abstract
The embodiment of the invention discloses a radio frequency identification devices (RFID) sensing device. The device comprises a baseplate and an antenna which is arranged on one side of the baseplate, wherein the antenna comprises a first antenna, a second antenna and a thermosensitive capacitor, the first antenna and the second antenna are arranged in parallel, and a gap is left between the first antenna and the second antenna; and the thermosensitive capacitor is connected on the first antenna in series. The RFID sensing device not only can be substituted for RFID tags in the current market, but also does not need integrated circuit (IC) chips, has a sensing function, is low in cost, and is convenient to popularize and use.
Description
Technical field
The application relates to the RFID technical field, relates in particular a kind of easy RFID sensing device.
Background technology
At present the employed RFID passive label of industry on electric property, is comprised of an antenna and an IC chip exactly, adds in addition encapsulation.
Take the attendance card label of a 920～925MHz as example, the processing cost of antenna is about 0.2 yuan, and the cost of IC chip is 0.4 yuan, and the link cost of antenna and chip is 0.05 yuan, and the cost of encapsulation and cross cutting, surface printing, packing is 0.2 yuan.So the cost of a final attendance card label is: the price+processing cost of total material=0.85 yuan.This causes existing label high cost, is inconvenient to promote the use of.
In addition, in numerous items is used, existing RFID passive label in use, the IC chip is reading out data or store data merely, and itself does not have sensing function, causes can't using in many special occasions.
Summary of the invention
For the technical matters that above-mentioned listed present industry faces, the technical matters that the application will solve provides a kind of can perception extraneous stress and variation thereof, sensing device with low cost, that be convenient to promote the use of, that be used for the RFID field.
For solving the problems of the technologies described above, the technical scheme that the application provides is:
A kind of RFID sensing device comprises: substrate and the antenna that is arranged on described substrate one side, wherein:
Described antenna comprises: the first antenna, the second antenna and temperature-sensitive electric capacity, and
Described the first antenna and the second antenna are parallel to be arranged, and is provided with the interval between the two;
Described temperature-sensitive capacitances in series is arranged on described the first antenna.
Preferably, the centre position of described the first antenna is provided with the interval, and described temperature-sensitive capacitances in series is between the interval of described the first antenna.
Preferably, described temperature-sensitive electric capacity is connected by between upside-down mounting, binding or soldering mode and described the first antenna.
Preferably, described substrate is the copper-plated printed circuit board (PCB) of single face.
Preferably, be provided with on the described substrate on the one side of antenna and also be provided with protective seam, for the protection of the antenna that is arranged on substrate surface.
Preferably, be provided with the interval between described antenna and the described substrate edges.
The application's beneficial effect is:
1, RFID passive label need not the IC chip.
2, the application's device, temperature equal stress that can its environment of living in of perception, the range of application that has greatly expanded original RFID brings more facility for people's work, life, study.
3, with low cost.Material, the processing cost of label inlay (inner core is exactly the label that does not have encapsulation), by original about 0.65 yuan drops to about 0.27 yuan.
A kind of RFID sensing device of the application has increased sensing function on the basis of traditional RFID label, and easy to process, with low cost, is convenient to promote the use of, and more is expected to promote the fast development of whole RFID industry.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is the application's embodiment, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to the accompanying drawing that provides other accompanying drawing.
Fig. 1 is the structural representation of a kind of RFID sensing device of the embodiment of the present application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described.Obviously, described embodiment only is a part of embodiment of the application, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the application's protection.
The structural representation of a kind of RFID sensing device that Fig. 1 provides for the embodiment of the present application.
As shown in Figure 1, this RFID sensing device comprises: substrate 100 and the antenna that is arranged on described substrate one side.
Substrate 100 can adopt printed circuit board (PCB), and such as FR-4 or PI, PET etc., and single face covers copper and gets final product on printed circuit board (PCB).In the application's example, the base material of employing is that thickness is the PET of 0.1mm; The thickness that single face covers aluminium is 0.012mm.
As shown in Figure 1, antenna can comprise: the first antenna 201, the second antenna 202 and temperature-sensitive electric capacity 203, wherein:
The first antenna 201 and the second antenna 202 parallel being arranged on the substrate 100 parallel and be provided with the interval between the two, and the interval between the first antenna 201 and the second antenna 202 are very near.
203 series connection of temperature-sensitive electric capacity are arranged on the first antenna 201.As shown in Figure 1, the centre of the first antenna 201 is provided with the interval, and temperature-sensitive electric capacity 203 is connected between the interval of the first antenna 201.
In the embodiment of the present application, the total length of two antennas is chosen in about 160mm, and wherein the up and down two arm middles of the first antenna 201 disconnect the interval about 0.5mm, and connects respectively at two pins of gap with temperature-sensitive electric capacity 203.
Temperature-sensitive electric capacity adopts 0603 encapsulation, and capacitance is 4.7pf (25 ℃), and temperature coefficient is 0.1pf/ ℃ (40～80 ℃).
In addition, in the embodiment of the present application, the connection that temperature-sensitive electric capacity 203 is connected with antenna can be adopted the mode of upside-down mounting; But be the situation of PI or FR-4 for substrate, can consider to adopt the connected modes such as binding, upside-down mounting or soldering.
In the embodiment of the present application, two bigger getting final product of area that antenna encloses of the Area Ratio of substrate 100, for example: the width of antenna can 1mm, and the Distances Between Neighboring Edge Points of every antenna distance substrate 100 can be 2mm.
In addition, for the antenna that is arranged on the substrate 100 is protected, in this RFID sensing device, can also be provided with protective seam in the one side of the substrate 100 that is provided with antenna, protective seam can be the plastic foils such as PVC, PC, ABS.
In addition, this RFID sensing device device that the embodiment of the present application provides, its frequency of operation is at 920～925MHz.
By above technical scheme as seen, in this RFID sensing device that the embodiment of the present application provides, the electromagnetic wave that receives of a direct scattering of antenna (reflection) wherein; The port of an other antenna (feeding point) links to each other with temperature-sensitive electric capacity, the electromagnetic wave that this antenna reception arrives via electric capacity phase shift (time delay) after again scattering.When this RFID sensing device used, read write line can be judged the environment temperature of the application's device by the time difference of the electromagnetic wave arrival of relatively two antenna scatterings.
Therefore, this RFID sensing device that the embodiment of the present application provides not only can substitute at present RFID label on the market, and need not the IC chip, have sensing function, with low cost, be convenient to promote the use of.
Should be understood that simultaneously, the application's scope of asking for protection is illustrated in the appended claims, and can not be with the foregoing description of instructions as restriction, and every apparent modification within the application's aim is also due within the application's the protection domain.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the application.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation of the spirit or scope that do not break away from the application, realize in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a RFID sensing device is characterized in that, comprising: substrate and the antenna that is arranged on described substrate one side, wherein:
Described antenna comprises: the first antenna, the second antenna and temperature-sensitive electric capacity, and
Described the first antenna and the second antenna are parallel to be arranged, and is provided with the interval between the two;
Described temperature-sensitive capacitances in series is arranged on described the first antenna.
2. RFID sensing device according to claim 1 is characterized in that, the centre position of described the first antenna is provided with the interval, and described temperature-sensitive capacitances in series is between the interval of described the first antenna.
3. RFID sensing device according to claim 2 is characterized in that, described temperature-sensitive electric capacity is connected by between upside-down mounting, binding or soldering mode and described the first antenna.
4. RFID sensing device according to claim 1 is characterized in that, described substrate is the copper-plated printed circuit board (PCB) of single face.
5. RFID sensing device according to claim 4 is characterized in that, is provided with on the described substrate on the one side of antenna and also is provided with protective seam, for the protection of the antenna that is arranged on substrate surface.
6. RFID sensing device according to claim 1 is characterized in that, is provided with the interval between described antenna and the described substrate edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103263372A CN102915456A (en) | 2012-09-06 | 2012-09-06 | Simple radio frequency identification devices (RFID) sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103263372A CN102915456A (en) | 2012-09-06 | 2012-09-06 | Simple radio frequency identification devices (RFID) sensing device |
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| Publication Number | Publication Date |
|---|---|
| CN102915456A true CN102915456A (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103263372A Pending CN102915456A (en) | 2012-09-06 | 2012-09-06 | Simple radio frequency identification devices (RFID) sensing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4752730A (en) * | 1985-10-28 | 1988-06-21 | The Narda Microwave Corp. | Radiation monitor diode detector with constant efficiency for both CW and pulsed signals |
| JP2008042734A (en) * | 2006-08-09 | 2008-02-21 | Nippon Electronics Service Kk | Rfid data carrier and rfid data carrier supporting member |
| CN101790815A (en) * | 2007-12-10 | 2010-07-28 | 欧姆龙株式会社 | Rfid tag, and system and method for detecting change of rfid tag environment |
| CN102110872A (en) * | 2011-03-10 | 2011-06-29 | 江苏拓元科技发展有限公司 | Radio frequency identification tag antenna applicable to non-metallic surface |
| CN102544721A (en) * | 2011-12-31 | 2012-07-04 | 电子科技大学 | Flat printing broadband directional antenna |
-
2012
- 2012-09-06 CN CN2012103263372A patent/CN102915456A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4752730A (en) * | 1985-10-28 | 1988-06-21 | The Narda Microwave Corp. | Radiation monitor diode detector with constant efficiency for both CW and pulsed signals |
| JP2008042734A (en) * | 2006-08-09 | 2008-02-21 | Nippon Electronics Service Kk | Rfid data carrier and rfid data carrier supporting member |
| CN101790815A (en) * | 2007-12-10 | 2010-07-28 | 欧姆龙株式会社 | Rfid tag, and system and method for detecting change of rfid tag environment |
| CN102110872A (en) * | 2011-03-10 | 2011-06-29 | 江苏拓元科技发展有限公司 | Radio frequency identification tag antenna applicable to non-metallic surface |
| CN102544721A (en) * | 2011-12-31 | 2012-07-04 | 电子科技大学 | Flat printing broadband directional antenna |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |