CN115688848A - Surface acoustic wave label structure adopting mask and coding identification method thereof - Google Patents
Surface acoustic wave label structure adopting mask and coding identification method thereof Download PDFInfo
- Publication number
- CN115688848A CN115688848A CN202211376163.0A CN202211376163A CN115688848A CN 115688848 A CN115688848 A CN 115688848A CN 202211376163 A CN202211376163 A CN 202211376163A CN 115688848 A CN115688848 A CN 115688848A
- Authority
- CN
- China
- Prior art keywords
- grating
- acoustic wave
- surface acoustic
- load
- reflection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a surface acoustic wave label structure adopting a mask and a coding identification method thereof. The surface acoustic wave tag comprises a plurality of reflection grating pairs, each reflection grating pair is composed of a reference reflection grating and a load reflection grating externally connected with a load capacitor, and the capacitance value of the load capacitor has a plurality of selectable options corresponding to codes which can appear in each reflection grating pair. Considering that the reflectivity of the load reflection grating changes along with the change of the external capacitor, the code value of the reflection grating pair is obtained through the amplitude ratio of two echo pulse signals corresponding to the load reflection grating and the reference reflection grating, and finally the code of the surface acoustic wave tag is identified. The invention is characterized in that only one mask is needed, the coding capacity can be dynamically expanded, and the identification method not only eliminates the influence of distance, but also avoids the coupling influence of codes among different reflecting grating pairs.
Description
The technical field is as follows:
the invention relates to a surface acoustic wave label structure and a coding identification method thereof, belonging to the field of radio frequency identification.
Background art:
in recent years, the technology of internet of things is rapidly developed, and the network connection requirements among people, people and objects and between objects appear in all industries. An accurate, efficient and low-cost radio frequency identification system is a necessary foundation of the Internet of things, and a tag and a reader are indispensable components of the radio frequency identification system.
The surface acoustic wave label is a novel coding label, uses a piezoelectric material as a substrate, utilizes a piezoelectric effect, excites the surface acoustic wave on the substrate through an interdigital transducer, and realizes the identification of codes mainly according to the characteristic that the echo characteristic of the label changes along with the coding of the label. Under the cooperation of the reader and the antenna, the surface acoustic wave tag does not need a power supply in the working process, has the advantages of passive and wireless performance, small volume and easy integration. Compared with an IC tag, the surface acoustic wave tag has better anti-interference capability in complex environments such as electromagnetic interference and the like.
The existing surface acoustic wave label usually adopts coding schemes such as pulse amplitude, pulse time delay combination phase and the like, and has the following problems:
(1) The encoding capacity of the pulse amplitude scheme is extremely small, the number of reflecting grids of different encoding labels is different, and the consistency design of label echo is difficult to realize, so that the subsequent reader design and identification algorithm are difficult; although the number of the reflecting grids of all the tags in the pulse delay scheme is the same, the coding capacity is improved to a certain extent, but the capacity is still limited; compared with pulse amplitude and pulse delay, the coding capacity of the pulse delay combined with the phase scheme is greatly improved, but the phase coding is obviously influenced by temperature, so that the temperature needs to be pertinently corrected during identification, and the phase has the problem of 360-degree ambiguity, so that the label design and the identification algorithm are complex.
(2) In order to realize different pulse amplitudes, time delays or phases of tag echoes, the structures of different tags are similar but different. The surface acoustic wave tag is usually manufactured by adopting a photoetching process, and for surface acoustic wave tags with different codes, different mask plates are required to be adopted in the three existing schemes, which is extremely expensive in cost. Therefore, for cost reasons, it is difficult to realize a large-scale application scenario of the internet of things with large-capacity coding besides small-capacity coding, which is the bottleneck currently faced by the surface acoustic wave radio frequency identification technology.
(3) In the process of processing and manufacturing the surface acoustic wave label, the mask with high cost has the characteristic of repeated use, so that the overall cost of the surface acoustic wave radio frequency identification system can be reduced to be put into practical application. However, each mask of the existing three coding schemes corresponds to each code one by one, and the characteristic that the mask can be repeatedly used cannot be fully exerted.
(4) The coding capacity of the surface acoustic wave label of the existing three schemes is determined by design rules, and once the design and manufacturing work is finished, the coding capacity cannot be changed. When the application scene is upgraded to cause insufficient coding capacity, the design rule needs to be changed and the tags need to be re-manufactured, all the original tags cannot be used, and the dynamic expansion of the coding capacity cannot be realized.
The invention content is as follows:
the invention provides a surface acoustic wave label structure adopting a mask and a coding identification method thereof aiming at the problems of the existing surface acoustic wave label coding scheme, which can break through the bottleneck of the surface acoustic wave radio frequency identification technology at present to a certain extent and has an open expansion function of coding capacity.
The invention adopts the following technical scheme: a surface acoustic wave label structure adopting a mask is provided, the surface acoustic wave labels of all codes are made of the same mask, and the codes of the surface acoustic wave labels are determined through the difference of external capacitors;
the surface acoustic wave label structure comprises a piezoelectric substrate, an interdigital transducer, m reflecting grating pairs, m load capacitors and an antenna; the interdigital transducer is deposited on the left side of the surface of the piezoelectric substrate, and the No. 1 reflecting grating pair, the No. 2 reflecting grating pair and the No. 8230are deposited in the subsequent space on the right side of the surface of the piezoelectric substrate according to the sequence of the distance from the interdigital transducer to the No. m reflecting grating pair from near to far; each reflection grating pair consists of a reference reflection grating and a load reflection grating, the reference reflection grating adopts an open-circuit grating structure, and the load reflection grating adopts an interdigital grating structure; the number of the load capacitors is equal to that of the reflection gate pairs, and each load reflection gate is externally connected with one load capacitor;
the capacitance value of each load capacitor has n selectable items, which correspond to n codes possibly appearing in each reflection gate pair and are marked as 1, 2, \8230;, n; the codes of the No. 1 reflective grating pair, the No. 2 reflective grating pair, \8230;, and the No. m reflective grating pair are respectively marked as x 1 、x 2 、…、x m The code correspondence of the surface acoustic wave tag is marked as x 1 -x 2 -…-x m So that the surface acoustic wave tag including m reflection grating pairs has a coding capacity of n m 。
Further, the antenna is manufactured on the PCB; the m load capacitors are welded on the PCB with the antenna; the piezoelectric substrate, the interdigital transducer and the m reflecting grating pairs are packaged after being manufactured by adopting a mask plate and then are welded on a PCB (printed Circuit Board) with an antenna; the bus bars at the two ends of the interdigital transducer are connected with the antenna on the PCB through the bonding pads on the package, and the bus bars at the two ends of each load reflecting grating are connected with one capacitor on the PCB through the bonding pads on the package, so that the surface acoustic wave tag is integrated on the PCB.
The invention also comprises the following technical scheme: the method for coding and identifying the surface acoustic wave label structure by adopting the mask comprises the following steps: wherein, the step A is an encoding stage:
step A: welding load capacitors with corresponding capacitance values at corresponding positions on the PCB aiming at surface acoustic wave labels with different codes, and attaching the PCB to an article to be identified;
and B: the reader transmits an excitation pulse signal, the excitation pulse signal is received by an antenna of the surface acoustic wave label and then enters the interdigital transducer, the excitation pulse signal is converted into the surface acoustic wave through the inverse piezoelectric effect, and the surface acoustic wave is transmitted to the m reflecting grating pairs along the surface of the piezoelectric substrate;
and C: the surface acoustic wave generates partial reflection and partial transmission through the 1 st reference reflecting grating of the 1 st reflecting grating pair, and the transmission signal of the surface acoustic wave generates partial reflection and partial transmission through the 1 st load reflecting grating of the 1 st reflecting grating pair; transmitting two surface acoustic wave reflection signals corresponding to the 1 st reference reflection grating and the 1 st load reflection grating back to the interdigital transducer, converting the two surface acoustic wave reflection signals into two echo pulse signals through a direct piezoelectric effect, and recording the two echo pulse signals as e 11 、e 12 ；
Step D: the surface acoustic wave transmission signal generated by the 1 st load reflection grating continues to propagate along the surface of the piezoelectric substrate, the reflection and transmission processes of the signal generated by the 2 nd reflection grating pair are the same as those in the step C, and the two echo pulse signals corresponding to the 2 nd reference reflection grating and the 2 nd load reflection grating are marked as e 21 、e 22 ；
And E, step E: the reflection and transmission processes of signals generated by the m-th reflection gate pair are the same as those in the step C; consistent with the steps C and D, marking the two echo pulse signals corresponding to the 3 rd reference reflecting grating and the 3 rd load reflecting grating as e 31 、e 32 8230, the two echo pulse signals corresponding to the mth reference reflective grating and the mth load reflective grating are marked as e m1 、e m2 ；
Step F: 2m echo pulse signals corresponding to the m reflecting grating pairs are transmitted back to the reader through the antenna to form echoes of the surface acoustic wave label; processing the two echo pulse signals of the 1 st reflecting grating pair to obtain two pulse signals e corresponding to the 1 st load reflecting grating and the 1 st reference reflecting grating 12 、e 11 Is recorded as p 1 Because the reflectivity of the load reflecting grid is in corresponding relation with the external load capacitor, according to p 1 Obtaining the code x of the 1 st reflection grating pair 1 (ii) a The same signal processing and analyzing method is adopted to obtain the 2 nd reflecting grating pair of 8230the code x of the m-th reflecting grating pair 2 、…、x m Thereby identifying the code x of the SAW tag 1 -x 2 -…-x m 。
The invention has the following beneficial effects:
1. compared with the pulse amplitude and pulse time delay coding scheme, the coding capacity is greatly improved; compared with a pulse delay combined phase coding scheme, the coding is less influenced by temperature, the temperature does not need to be subjected to targeted correction during identification, and the label design and the identification algorithm are relatively simple.
2. The surface acoustic wave tags of all codes only need one mask, so that the large-scale application scene of the Internet of things of high-capacity codes can be realized, and the bottleneck faced by the surface acoustic wave radio frequency identification technology at present is broken through.
3. The reusable characteristic of the mask is fully exerted, so that the overall cost of the surface acoustic wave radio frequency identification system is reduced to be put into practical application.
4. On the premise of ensuring the identification performance of the reader, the dynamic expansion of the coding capacity can be realized by subdividing the capacitance value selectable by the load capacitance, and the original tag can be continuously used.
5. Each reflection grating pair not only comprises a load reflection grating, but also comprises a corresponding reference reflection grating, and the code of the reflection grating pair is obtained through the ratio of the amplitudes of the echo pulse signals corresponding to the two reflection gratings, so that the code of the surface acoustic wave label is identified, the influence of the distance is eliminated, and the influence of the capacitance value change of the external capacitor of the load reflection grating in front on the load reflection grating in the rear is also eliminated.
Description of the drawings:
FIG. 1 is a schematic diagram of a SAW tag structure employing a mask according to the present invention.
Fig. 2 is a schematic diagram of the integration of the saw tag of the present invention on a PCB.
Fig. 3 is a schematic diagram of an echo of a saw tag of the present invention.
Fig. 4 (a), 4 (b), and 4 (c) show the changes of the corresponding echo pulse signals when the load reflection grating of the yth reflection grating pair of the saw tag of the present invention is externally connected with capacitors with different capacitance values under the premise that the identification distance is not changed.
Fig. 5 (a) and 5 (b) are schematic diagrams of echoes of the surface acoustic wave tag when the recognition distance is short and long under the premise that the capacitance values of the external capacitors of all the load reflection gates are not changed.
The specific implementation mode is as follows:
the invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, the surface acoustic wave tag structure of the present invention includes a piezoelectric substrate, an interdigital transducer, m reflection grating pairs, m load capacitors, and an antenna; the interdigital transducer is deposited on the left side of the surface of the piezoelectric substrate, and a 1 st reflecting grating pair, a 2 nd reflecting grating pair, \8230, an m-th reflecting grating pair are deposited in a subsequent space on the right side of the surface of the piezoelectric substrate according to the sequence of the distance from the interdigital transducer to the interdigital transducer from near to far; each reflecting grating pair consists of a reference reflecting grating and a load reflecting grating, the reference reflecting grating adopts an open-circuit grating structure, and the load reflecting grating adopts an interdigital grating structure; the number of the load capacitors is equal to that of the reflection gate pairs, and each load reflection gate is externally connected with one load capacitor; the antenna is manufactured on a Printed Circuit Board (PCB); m load capacitors are welded on the PCB with the antenna; packaging the piezoelectric substrate, the interdigital transducers and the m reflecting grating pairs after the manufacturing of the mask is completed, and then welding the packaging on the PCB with the antenna; the bus bars at two ends of the interdigital transducer are connected with the antenna on the PCB through the bonding pads on the package, and the bus bars at two ends of each load reflection gate are connected with one capacitor on the PCB through the bonding pads on the package, so that the surface acoustic wave tag is integrated on the PCB; all the coded surface acoustic wave tags are manufactured by the same mask, and the codes of the surface acoustic wave tags are determined by the difference of external capacitors; the capacitance value of each load capacitor has n selectable items, which correspond to n codes possibly appearing in each reflection gate pair and are marked as 1, 2, \8230;, n; the codes of the No. 1 reflective grating pair, the No. 2 reflective grating pair, \8230;, and the No. m reflective grating pair are respectively marked asx 1 、x 2 、…、x m The code correspondence of the surface acoustic wave tag is marked as x 1 -x 2 -…-x m So that the surface acoustic wave tag including m reflection grating pairs has a coding capacity of n m . Taking m =8 and n =10 as examples, the coding capacity can reach 10 8 =1 hundred million.
Referring to fig. 3 in conjunction with fig. 1, the reader transmits excitation pulse signals, and the received surface acoustic wave tag echoes include 2m echo pulse signals, which correspond to m reflection grating pairs. The two echo pulse signals corresponding to the 1 st reference reflection grating and the 1 st load reflection grating of the 1 st reflection grating pair are respectively e 11 、e 12 (ii) a The two echo pulse signals corresponding to the 2 nd reference reflection grating and the 2 nd load reflection grating of the 2 nd reflection grating pair are respectively e 21 、e 22 (ii) a 8230; the two echo pulse signals corresponding to the mth reference reflecting grating and the mth load reflecting grating of the mth reflecting grating pair are respectively e m1 、e m2 . The time delay between each echo pulse signal and the distance between each reflecting grating are in one-to-one correspondence, and the amplitude of each echo pulse signal is related to the reflectivity of each reflecting grating.
Referring to fig. 4 (a), 4 (b), and 4 (c), since the reflectivity of the load reflection grating changes with the capacitance of the external capacitor, when the capacitance of a certain load capacitor changes, the amplitude of the echo pulse signal corresponding to the corresponding load reflection grating changes; meanwhile, the load capacitance does not influence the amplitude of the echo pulse signal corresponding to the reference reflection grating. Taking the y-th reflecting grating pair of the surface acoustic wave tag as an example, when the y-th load reflecting grating is externally connected with capacitors with different capacitance values, the echo pulse signal e y2 Is changed in amplitude, but e y1 And is not changed.
Referring to fig. 5 (a) and 5 (b), as the identification distance increases, the amplitudes of the echo pulse signals corresponding to all the reflection gratings, whether the reflection grating is the reference reflection grating or the load reflection grating, decrease, that is, the amplitudes of the echo pulse signals are inversely proportional to the identification distance; however, for all the reflection grating pairs, the amplitude ratio of the echo pulse signals corresponding to the load reflection grating and the reference reflection grating in the same reflection grating pair is irrelevant to the identification distance, namely the amplitude ratio of the two echo pulse signals in the reflection grating pair can eliminate the influence of the identification distance and is in a corresponding relation with the capacitance value of the external capacitor of the load reflection grating. Meanwhile, the acoustic surface wave passes through the 1 st reflecting grating pair, the 2 nd reflecting grating pair and the 8230in sequence when propagating on the piezoelectric substrate, and the m-th reflecting grating pair actually influences the reflectivity of all the rear reflecting grating pairs due to the reflectivity change of the front reflecting grating pair, so that the amplitude of echo pulse signals corresponding to all the rear reflecting grating pairs, namely the reference reflecting grating and the load reflecting grating, is changed, but the influence of the identification distance is eliminated and the influence of the capacitance value change of the external capacitor of the front load reflecting grating on the rear load reflecting grating is also eliminated due to the adoption of the amplitude ratio of the echo pulse signals.
Referring to fig. 1 to 5, the method for encoding and identifying a surface acoustic wave tag structure using a mask according to the present invention includes the following steps, wherein step a is an encoding stage:
step A: welding load capacitors with corresponding capacitance values at corresponding positions on the PCB aiming at surface acoustic wave labels with different codes, and attaching the PCB to an article to be identified;
and B, step B: the reader transmits an excitation pulse signal, the excitation pulse signal is received by an antenna of the surface acoustic wave tag and then enters the interdigital transducer, the excitation pulse signal is converted into the surface acoustic wave through the inverse piezoelectric effect, and the surface acoustic wave propagates to the m reflecting grating pairs along the surface of the piezoelectric substrate;
step C: the surface acoustic wave generates partial reflection and partial transmission through the 1 st reference reflecting grating of the 1 st reflecting grating pair, and the transmission signal of the surface acoustic wave generates partial reflection and partial transmission through the 1 st load reflecting grating of the 1 st reflecting grating pair; transmitting two surface acoustic wave reflection signals corresponding to the 1 st reference reflection grating and the 1 st load reflection grating back to the interdigital transducer, and converting the two surface acoustic wave reflection signals into two echo pulse signals e through a direct piezoelectric effect 11 、e 12 ；
Step D: the surface acoustic wave transmission signal generated by the 1 st load reflection grating continues to propagate along the surface of the piezoelectric substrate, the reflection and transmission processes of the signal generated by the 2 nd reflection grating are the same as those in the step C, and the 2 nd reference reflection grating and the 2 nd load reflection grating correspond to each otherTwo echo pulse signals are respectively e 21 、e 22 ；
Step E: the reflection and transmission processes of signals generated by the surface acoustic wave passing through the No. 3 reflecting grating pair and the No. 8230are the same as those in the step C; in accordance with the steps C and D, the two echo pulse signals corresponding to the 3 rd reference reflection grating and the 3 rd load reflection grating are respectively e 31 、e 32 8230, the two echo pulse signals corresponding to the mth reference reflective grating and the mth load reflective grating are respectively e m1 、e m2 ；
Step F: 2m echo pulse signals corresponding to the m reflecting grating pairs are transmitted back to the reader through the antenna to form echoes of the surface acoustic wave label; processing the two echo pulse signals of the 1 st reflecting grating pair to obtain two pulse signals e corresponding to the 1 st load reflecting grating and the 1 st reference reflecting grating 12 、e 11 Is recorded as p 1 Because the reflectivity of the load reflecting grid is in corresponding relation with the external load capacitor, according to p 1 Obtain the code x of the 1 st reflecting grating pair 1 (ii) a The same signal processing and analyzing method is adopted to obtain the code x of the 2 nd reflecting grating pair of 8230the m-th reflecting grating pair 2 、…、x m Thereby identifying the code x of the SAW tag 1 -x 2 -…-x m 。
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (3)
1. The utility model provides an adopt surface acoustic wave label structure of a mask version which characterized in that: the surface acoustic wave tags of all the codes are manufactured by adopting the same mask, and the codes of the surface acoustic wave tags are determined through the difference of external capacitors;
the surface acoustic wave tag structure comprises a piezoelectric substrate, an interdigital transducer, m reflecting grating pairs, m load capacitors and an antenna; the interdigital transducers are deposited on the left side of the surface of the piezoelectric substrate, and the No. 1 reflecting grating pair, the No. 2 reflecting grating pair and the No. 8230are deposited in the subsequent space on the right side of the surface of the piezoelectric substrate according to the sequence of the distance from the No. m reflecting grating pair to the interdigital transducers from near to far; each reflection grating pair consists of a reference reflection grating and a load reflection grating, the reference reflection grating adopts an open-circuit grating structure, and the load reflection grating adopts an interdigital grating structure; the number of the load capacitors is equal to that of the reflection grid pairs, and each load reflection grid is externally connected with one load capacitor;
the capacitance value of each load capacitor has n selectable items, which correspond to n codes possibly appearing in each reflection gate pair and are marked as 1, 2, \8230;, n; the 1 st, 2 nd and m th reflective grating pairs are respectively marked as x 1 、x 2 、…、x m The code correspondence of the surface acoustic wave tag is marked as x 1 -x 2 -…-x m So that the surface acoustic wave tag comprising m reflection grating pairs has a coding capacity of n m 。
2. A surface acoustic wave tag structure using a mask as claimed in claim 1, wherein: the antenna is manufactured on the PCB; the m load capacitors are welded on the PCB with the antenna; the piezoelectric substrate, the interdigital transducers and the m reflecting grating pairs are packaged after being manufactured by adopting a mask plate and then are welded on a PCB (printed Circuit Board) with an antenna; the bus bars at the two ends of the interdigital transducer are connected with the antenna on the PCB through the bonding pads on the package, and the bus bars at the two ends of each load reflecting grating are connected with one capacitor on the PCB through the bonding pads on the package, so that the surface acoustic wave tag is integrated on the PCB.
3. A method for code recognition of a surface acoustic wave tag structure using a mask as claimed in claim 1 or 2, characterized in that: the method comprises the following steps: wherein, the step A is an encoding stage:
step A: welding load capacitors with corresponding capacitance values at corresponding positions on the PCB aiming at surface acoustic wave labels with different codes, and attaching the PCB to an article to be identified;
and B: the reader transmits an excitation pulse signal, the excitation pulse signal is received by an antenna of the surface acoustic wave tag and then enters the interdigital transducer, the excitation pulse signal is converted into the surface acoustic wave through the inverse piezoelectric effect, and the surface acoustic wave propagates to the m reflecting grating pairs along the surface of the piezoelectric substrate;
step C: the surface acoustic wave generates partial reflection and partial transmission through the 1 st reference reflecting grating of the 1 st reflecting grating pair, and the transmission signal of the surface acoustic wave generates partial reflection and partial transmission through the 1 st load reflecting grating of the 1 st reflecting grating pair; transmitting two surface acoustic wave reflection signals corresponding to the 1 st reference reflection grating and the 1 st load reflection grating back to the interdigital transducer, converting the two surface acoustic wave reflection signals into two echo pulse signals through a direct piezoelectric effect, and recording the two echo pulse signals as e 11 、e 12 ；
Step D: the surface acoustic wave transmission signal generated by the 1 st load reflection grating continues to propagate along the surface of the piezoelectric substrate, the reflection and transmission processes of the signal generated by the 2 nd reflection grating pair are the same as those in the step C, and the two echo pulse signals corresponding to the 2 nd reference reflection grating and the 2 nd load reflection grating are marked as e 21 、e 22 ；
And E, step E: the reflection and transmission processes of signals generated by the surface acoustic wave passing through the No. 3 reflecting grating pair and the No. 8230are the same as those in the step C; in accordance with the steps C and D, the two echo pulse signals corresponding to the 3 rd reference reflection grating and the 3 rd load reflection grating are recorded as e 31 、e 32 8230, the two echo pulse signals corresponding to the mth reference reflective grating and the mth load reflective grating are marked as e m1 、e m2 ；
Step F: 2m echo pulse signals corresponding to the m reflecting grating pairs are transmitted back to the reader through the antenna to form echoes of the surface acoustic wave label; processing the two echo pulse signals of the 1 st reflecting grating pair to obtain two pulse signals e corresponding to the 1 st load reflecting grating and the 1 st reference reflecting grating 12 、e 11 Is given as p 1 Because the reflectivity of the load reflecting grid is in corresponding relation with the external load capacitor, according to p 1 Obtaining the code x of the 1 st reflection grating pair 1 (ii) a The same signal processing and analyzing method is adopted to obtain the code x of the 2 nd reflecting grating pair of 8230the m-th reflecting grating pair 2 、…、x m Thereby identifying the code x of the SAW tag 1 -x 2 -…-x m 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211376163.0A CN115688848A (en) | 2022-11-04 | 2022-11-04 | Surface acoustic wave label structure adopting mask and coding identification method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211376163.0A CN115688848A (en) | 2022-11-04 | 2022-11-04 | Surface acoustic wave label structure adopting mask and coding identification method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115688848A true CN115688848A (en) | 2023-02-03 |
Family
ID=85047533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211376163.0A Pending CN115688848A (en) | 2022-11-04 | 2022-11-04 | Surface acoustic wave label structure adopting mask and coding identification method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115688848A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388717A (en) * | 2023-06-02 | 2023-07-04 | 深圳飞骧科技股份有限公司 | Automatic assembly method, system and related equipment for layout of surface acoustic wave filter |
-
2022
- 2022-11-04 CN CN202211376163.0A patent/CN115688848A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388717A (en) * | 2023-06-02 | 2023-07-04 | 深圳飞骧科技股份有限公司 | Automatic assembly method, system and related equipment for layout of surface acoustic wave filter |
| CN116388717B (en) * | 2023-06-02 | 2023-08-15 | 深圳飞骧科技股份有限公司 | Automatic assembly method, system and related equipment for layout of surface acoustic wave filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8463185B2 (en) | Wireless communication system using surface acoustic wave (SAW) second harmonic techniques | |
| CN100418104C (en) | Surface acoustic wave converter and identification system using the same | |
| US6060815A (en) | Frequency mixing passive transponder | |
| US4625208A (en) | Surface acoustic wave passive transponder having acoustic wave reflectors | |
| US6121892A (en) | SAW identification or sensor configuration operating with surface acoustic waves | |
| CN115688848A (en) | Surface acoustic wave label structure adopting mask and coding identification method thereof | |
| CN103268514B (en) | Radio-frequency recognition system based on SAW technologies | |
| EP1901427B1 (en) | A wireless communication system using surface acoustic wave (SAW) single-phase unidirectional transducer (Spudt) techniques | |
| CN103954823B (en) | Surface acoustic wave current sensor | |
| CN105117764B (en) | A kind of high-performance anticollision SAW delay line type wireless sensor system | |
| US7623037B1 (en) | Multi-transducer/antenna surface acoustic wave device sensor and tag | |
| US5986382A (en) | Surface acoustic wave transponder configuration | |
| EP3176550B1 (en) | Surface-acoustic wave resonator type vibration sensor and vibration detection system | |
| CN105608400B (en) | Surface acoustic wave wireless sensor reading device and implementation method | |
| Schüßler et al. | Phase modulation scheme for chipless RFID-and wireless sensor tags | |
| Pohl et al. | Spread spectrum techniques for wirelessly interrogable passive SAW sensors | |
| CN210666839U (en) | Chipless radio frequency identification tag | |
| CN205175572U (en) | Alliteration way surface acoustic wave temperature sensor | |
| KR900701073A (en) | Electric transmission method and device | |
| Suresh et al. | A read range maximization approach for UWB surface acoustic wave (SAW) RFID tags based on interdigital transducer (IDT) as a reflector | |
| US7158763B2 (en) | Multi-IDT SAW hybrid communication system | |
| Sveshnikov et al. | Multitransducer SAW device architecture for passive wireless sensor tags | |
| DE102004006358A1 (en) | Temperature monitored hydrodynamic machine, especially a turbo-coupling, has a temperature measurement arrangement installed in a rotating component to yield a temperature dependent signal corresponding to the working medium | |
| Ostermayer et al. | Multiple access to SAW sensors using matched filter properties | |
| KR100971000B1 (en) | Saw device type reader appartus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |