CN113807113A - RFID identification channel equipment - Google Patents
RFID identification channel equipment Download PDFInfo
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- CN113807113A CN113807113A CN202111093093.3A CN202111093093A CN113807113A CN 113807113 A CN113807113 A CN 113807113A CN 202111093093 A CN202111093093 A CN 202111093093A CN 113807113 A CN113807113 A CN 113807113A
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- 239000011159 matrix material Substances 0.000 claims description 18
- 238000012163 sequencing technique Methods 0.000 claims description 11
- 239000011358 absorbing material Substances 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 3
- 230000037361 pathway Effects 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005693 optoelectronics Effects 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013075 data extraction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10069—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the frequency domain, e.g. by hopping from one frequency to the other
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10356—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
Abstract
The RFID identification channel equipment adopts a plurality of groups of antennas, a plurality of groups of photoelectric triggers and a plurality of groups of RFID readers to form a plurality of RFID reading units in the channel equipment, and the plurality of RFID reading units work simultaneously when goods enter the channel equipment, so that RFID labels of the goods passing through quickly can be read, and the label missing rate is reduced; the radiation lobe of design antenna satisfies the settlement condition for the interval region between the adjacent RFID discernment unit forms the RFID and can not discern the reading region, ensures that the goods is not read the label by the mistake outside the RFID discernment region, reduces data string read rate. The working channel allocation method is used for allocating working channels to a plurality of groups of RFID readers in the channel equipment, so that the RFID readers work in different frequency channels, intersymbol interference between the readers is reduced when the readers communicate, and the identification accuracy of the goods RFID tags is ensured.
Description
Technical Field
The invention belongs to the field of radio frequency identification channel equipment, and particularly relates to RFID identification channel equipment and an RFID reader-writer working channel distribution method.
Background
Radio Frequency Identification (RFID) technology is widely used in the fields of logistics management, supply chain management, warehousing sorting and the like, and has obvious advantages when a large number of goods need to be identified or managed.
Taking goods sorting as an example, goods pasted with RFID tags sequentially flow on a conveyor belt, and RFID identification equipment with multiple groups of antennas collects the RFID tags on the goods. Most of the existing multi-antenna RFID identification equipment adopts an antenna polling working mode, the requirement is met on the distance between a goods conveyor belt and goods, and the conditions of missed identification and tag serial reading are caused when the conveyor belt moves too fast or the goods distance is too small.
Along with the rapid development of logistics transportation, the requirement on a logistics sorting system is higher, the increase of logistics transportation business requires the circulation speed of the sorting system to be increased, the increase of the quantity of goods can also cause the shortening of goods spacing during sorting, the working mode of antenna polling cannot meet the increasing business requirement, and the existing RFID identification equipment needs to be improved.
Disclosure of Invention
Based on this, the present invention aims to provide an RFID identification channel device and an RFID reader/writer working channel allocation method, so as to overcome the defects of the prior art.
In a first aspect, the present invention provides an RFID identification passage apparatus, including:
the system comprises a plurality of groups of antennas, a plurality of groups of photoelectric triggers, a plurality of groups of RFID readers-writers and a controller;
the photoelectric trigger and the RFID reader-writer are alternately arranged on the inner side of the identification channel device along the movement direction of the goods in the channel device;
the antennas are arranged in the channel equipment, and each group of antennas is electrically connected with one group of RFID readers-writers;
the photoelectric trigger and the RFID reader-writer are electrically connected with the controller;
the radiation lobe of the antenna meets the set condition, so that a plurality of RFID reading areas which are not interfered with each other are formed in the channel of the RFID identification channel equipment, and the interval areas between the adjacent RFID reading areas form RFID unreadable areas;
each RFID reading area is provided with a group of RFID reading units, each group of RFID reading units comprises a group of antennas, a group of photoelectric triggers and a group of RFID readers-writers, and the plurality of groups of RFID reading units work simultaneously.
Furthermore, the polarization mode of the antenna is circular polarization, and the half-power lobe width meets the condition of setting the lobe width.
Further, the half power lobe width is set to ≦ 47 degrees.
Further, the RFID reader is configured to:
the adjacent RFID readers have different uplink working speeds and different downlink working speeds.
Further, the RFID reader is further configured to:
adjacent RFID readers have different operating channels.
Further, the distance between adjacent photoelectric triggers is larger than a set distance threshold.
Further, the optoelectronic trigger is movably arranged at the channel device.
Further, the antenna is movably mounted inside the passage device by a sliding bracket.
Furthermore, the inner wall of the channel device is covered with wave-absorbing materials.
In a second aspect, the present invention provides a method for allocating working channels of RFID readers, where the method is applied to a controller of an RFID identification channel device provided in the first aspect, and is used to allocate working channels to multiple groups of RFID readers in the first aspect, and includes:
constructing a channel interval matrix of the RFID reader-writer, wherein matrix elements are channel interval theoretical values of any two RFID reader-writers;
summing rows of the channel interval matrix respectively, and sequencing the RFID readers according to set sequencing conditions according to a summing result;
and distributing working channels to the RFID readers according to the sequencing result.
Further, constructing the RFID reader channel spacing matrix includes:
and assigning values to each element in the channel interval matrix according to a set rule.
Furthermore, a first channel interval theoretical value is assigned to the channel interval of the adjacent RFID reader-writer, and a second channel interval theoretical value is assigned to the channel interval of the non-adjacent RFID reader-writer.
Further, the sorting the RFID readers according to the summation result and the set sorting condition includes:
and sorting the RFID readers in a descending or ascending order according to the summation result.
Further, the allocating the working channel to each RFID reader according to the sorting result includes:
and determining the frequency range of the optional channel of the RFID reader-writer according to the sequencing result, and determining and distributing the working channel of the RFID reader-writer in the frequency range of the optional channel according to the reading strength of the RFID reading unit where the RFID reader-writer is located.
According to the technical scheme, the invention has the following beneficial effects:
the invention relates to an RFID identification channel device and an RFID reader-writer working channel allocation method, wherein the RFID identification channel device adopts a plurality of groups of antennas, a plurality of groups of photoelectric triggers and a plurality of groups of RFID readers-writers to form a plurality of RFID reading units in the channel device; the radiation lobe of design antenna satisfies the settlement condition for the interval region between the adjacent RFID discernment unit forms the RFID and can not discern the reading region, ensures that the goods is not read the label by the mistake outside the RFID discernment region, reduces data string read rate. The working channel allocation method is used for allocating working channels to a plurality of groups of RFID readers in the channel equipment, so that the RFID readers work in different frequency channels, intersymbol interference between the readers is reduced when the readers communicate, and the identification accuracy of the goods RFID tags is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of an RFID identification channel device according to an embodiment of the present invention
FIG. 2 is an electrical schematic diagram of an RFID identification channel device according to an embodiment of the present invention
FIG. 3 is a schematic diagram of the distribution of RFID read areas and RFID unreadable areas in a channel device according to an embodiment of the present invention
FIG. 4 is a schematic diagram of an RFID tag reading process according to an embodiment of the present invention
FIG. 5 is a flowchart of a method for allocating working channels of an RFID reader/writer according to an embodiment of the present invention
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides an RFID identification passage apparatus, including:
a plurality of groups of photoelectric triggers 101, a plurality of groups of antennas 102, a plurality of groups of RFID readers 103 and a controller 106;
the photoelectric trigger 101 and the RFID reader-writer 103 are alternately arranged on the inner side of the identification channel device along the movement direction of the goods in the channel device;
the antennas 101 are installed inside the channel device, and each group of antennas 102 is electrically connected with a group of RFID readers-writers;
the photoelectric trigger 101 and the RFID reader-writer 103 are both electrically connected with the controller 106;
the radiation lobe of the antenna meets the set condition, so that a plurality of RFID reading areas which are not interfered with each other are formed in the channel of the RFID identification channel equipment, and the interval areas between the adjacent RFID reading areas form RFID unreadable areas;
each RFID reading area is provided with a group of RFID reading units, each group of RFID reading units comprises a group of antennas 102, a group of photoelectric triggers 101 and a group of RFID readers 103, and the plurality of groups of RFID reading units work simultaneously.
When goods move through in RFID discernment passageway equipment, will pass through RFID recognition region and RFID can not recognition region in turn, when goods pass through RFID recognition region, the RFID label of pasting on the goods carries out induction communication through the antenna with the RFID read write line in place region for the RFID read write line can read the RFID label. Through setting for the radiation lobe of antenna according to the settlement condition, every RFID discerns reading area mutual noninterference when reading the RFID label to two adjacent discernment areas have been kept apart in the RFID can not discerned reading area, guarantee that the RFID label can be discerned by each RFID read write line accuracy in the channel equipment and read. The multiple groups of RFID reading units work simultaneously, and the RFID tags on the goods with higher movement speed are accurately read. And carrying out data weighting on the label information acquired by the plurality of groups of RFID reading units, and finally confirming the RFID label matched with the goods.
The RFID identification channel equipment provided by this embodiment is used to collect RFID tag information, the time consumed for successfully identifying and reading information (EPC + USER) 1 time is about 60ms according to the RFID tag, the length of an article is 50cm, the line flow rate can reach 0.5m/0.06s or 8.3m/s, the line speed is controlled below 3m/s according to the safety of the line speed used in the industry, and at least 2 times of information collection can be completed.
Example 2
Referring to fig. 1 and fig. 2, on the basis of embodiment 1, the present embodiment provides another RFID identification passage apparatus, including:
the system comprises a plurality of groups of photoelectric triggers 101, a plurality of groups of antennas 102, a plurality of groups of RFID readers-writers 103, an acousto-optic indicator lamp 104 and a controller 106.
Specifically, in the present embodiment, the grating is preferably used as the optoelectronic trigger, i.e. the grating 101, but it is understood that the grating is not the only choice of the optoelectronic trigger, and the choice of the optoelectronic trigger is not limited in the present invention.
The antenna 102 may be movably mounted to the access device by a sliding mount to accommodate the need for an adjustable range of RFID reading areas.
Referring to fig. 1, the gratings 101 and the RFID readers 103 are alternately arranged on the inner side of the passage device along the moving direction of the goods in the passage device, that is, the RFID reader is arranged between two adjacent gratings as shown in the figure. The signal line of the grating 101 is connected to the IO port of the controller 106, and the RFID reader/writer 102 is also connected to the controller 106 through the signal line.
Each group of antennas 102 is electrically connected to a group of RFID readers 103 for completing signal transmission between the RFID readers and the RFID tags of the goods.
The RFID identification passage device of the embodiment further includes an acousto-optic indicator light 104, where the acousto-optic indicator light 104 is directly connected to the controller 106, and is used for prompting according to an RFID tag identification result; the method can also be used for prompting system faults, such as short-sound green light flashing once for a normally identified article, short-sound yellow light cannot be identified and displayed once, and long-sound red light flashing is carried out when the article exists in the reading channel for a long time to prompt the system faults.
The combination of the grating 101, the antenna 102 and the RFID reader-writer 103 is arranged in the channel device to form a plurality of RFID reading areas, each RFID reading area is provided with a group of RFID reading units, each group of RFID reading units comprises a group of grating 101, a group of antenna 102 and a group of RFID reader-writer 103, and the plurality groups of RFID reading units work simultaneously.
And designing radiation lobes of the antenna according to set conditions, so that the RFID reading areas do not interfere with each other.
Specifically, in a further embodiment, to realize an RFID tag capable of accurately identifying goods at a high speed of goods movement, a narrow-band antenna needs to be designed, so that a radiation lobe of the antenna is narrow enough, and the goods cannot be identified outside an identification area. In order to make the antenna radiation lobe sufficiently narrow, the setting condition can be that the antenna polarization mode adopts circular polarization, and the lobe width condition is set to be that the half-power lobe width is less than or equal to 47 degrees.
With reference to fig. 3, a plurality of alternate RFID reading areas and RFID unreadable areas are formed in the passage device, the RFID tag of the goods can be read only in the RFID reading areas, the length of the RFID unreadable areas can be adjusted according to actual needs, and the length of the RFID unreadable areas is set to 20cm in this embodiment.
In a further embodiment, the grating 101 is designed to be movably installed, and in cooperation with the movable antenna 102, the coverage of the radio frequency signal in the RFID reading area is dynamically adjusted, the distance between two adjacent gratings needs to be greater than a set distance threshold, and the grating distance is generally set to be greater than or equal to the length of the currently identified cargo in the moving direction + the length of the RFID non-readable area.
In a further embodiment, in order to reduce data serial reading, the inner wall of the channel device is covered with a wave-absorbing material 105 for absorbing multipath reflected waves formed by the antenna in the channel device, so that the isolation between the RFID reading area and the RFID non-readable area can be ensured.
When multiple sets of RFID reading units work simultaneously, the problem of mutual interference between the readers and the readers when the multiple readers work simultaneously needs to be solved, the accuracy of information read by RFID labels is ensured, under the condition that the RFID air interface protocol is met, each RFID reading unit has different uplink and downlink working rates at an air interface end and different uplink link coding modes, the RFID air interface protocol specifies that the uplink coding modes comprise FM0, Miller2, Miller4 and Miller8, the uplink link frequency is 40 KHz-640 KHz, the downlink link frequency is 40KHz, 80KHz and 160KHz, different uplink working rates and different downlink working rates are configured for each adjacent RFID reader, and the problem of intersymbol interference during communication of the multiple readers is solved.
And meanwhile, adjacent RFID readers can work in different channels through the distribution of the controller 106.
The RFID identification channel equipment provided by the embodiment adopts a plurality of groups of RFID identification units to work simultaneously, so that RFID labels of goods passing through quickly can be identified and read, and the label missing rate is reduced; the radiation lobe of design antenna satisfies the settlement condition for the interval region between the adjacent RFID discernment unit forms the RFID and can not discern the reading region, ensures that the goods is not read the label by the mistake outside the RFID discernment region, reduces data string read rate. The RFID reader-writer works in different channels, and intersymbol interference between the reader-writer is reduced.
Example 3
Referring to fig. 3 and 4, the embodiment provides a process for reading an RFID tag by using the RFID identification passage apparatus provided in the present invention.
Set for in this embodiment to be formed with 3 RFID recognition units in the channel equipment, article 1 passes through each recognition unit in proper order, accomplishes RFID label recognition in the RFID recognition region that each recognition unit formed, and all recognition units are all accomplished the label and are read the back, carry out weighted fusion and data arbitration to the recognition result of each time.
Article 1 gets into the passway door and shelters from grating one and gets into identification reading area one, identification reading unit one carries out reading of RFID information, article 1 moves and gets into completely in identification reading unit one, grating one breaks away from sheltering from this moment, article 1 leaves identification reading area once after passing through RFID can't identify reading area, article 1 shelters from grating two and gets into identification reading area two afterwards, identification reading unit two carries out reading of RFID information, article 1 moves and gets into identification reading unit two completely, grating two breaks away from sheltering from this moment, article leave identification reading area two and pass through next RFID can't identify reading area after, shelter from grating three and get into identification reading area three, identification reading unit three carries out reading of RFID information, article 1 gets into identification reading unit three completely, grating three breaks away from sheltering from this moment.
When the article 1 leaves the access door, data extraction is carried out on the data of each recognition unit through the self-adaptive sliding window, field intensity filtering is carried out, then data weighting fusion is carried out, weight distribution of credibility can be confirmed by analyzing the distance between the recognized position of the RFID label and the antenna radiation center of the current recognition unit, and the longer the distance is, the lower the credibility weight is. In addition, the number of times the RFID tag is read, the RSSI value of the RFID tag, and the like may be considered.
And after weighting and fusing the RFID label information acquired by the multiple groups of RFID identification units, finally confirming the RFID label matched with the article 1, and performing data arbitration on the RFID label. The purpose of data arbitration is to confirm the validity of the RFID tag. For example, if the movement distance between the current article and the front and rear adjacent articles is judged to be too small, the current RFID tag can be marked as sticky package data, and prompt is carried out through an indicator light; comparing the RFID tag information with the RFID tag of the identified article, filtering the same RFID tag information, and prompting that the RFID tag does not exist in the current article or the tag is damaged if the RFID tag information does not exist after filtering; and comparing the RFID tag information with the RFID tag of the unidentified article, and comparing the identification times of the RFID tag information when the same RFID tag information exists, wherein the RFID tag belongs to the article with more identification times.
Example 4
Referring to fig. 5, the present embodiment provides a method for allocating working channels of RFID readers, where the method is applied to the controller 106 of the RFID identification channel device provided in the foregoing embodiment, and is used to allocate working channels to multiple groups of RFID readers in the foregoing embodiment.
The channel allocation method is implemented by the following steps:
s101, constructing a channel interval matrix of the RFID reader-writer.
And S102, summing the rows of the channel interval matrix respectively, and sequencing the RFID reader according to the summation result and the set sequencing condition.
Specifically, the summation result of the ith row corresponds to the ith RFID reader-writer, for example, the first row [ CS ] of the matrix CS11…CS1j]And summing, wherein the summation result represents the sum of the channel intervals of the 1 st RFID reader-writer and other RFID reader-writers.
And S103, distributing working channels to the RFID readers according to the sequencing result.
Specifically, the RFID readers may be sorted in a descending order according to the summation result, the selectable channel frequency range of the RFID reader is determined according to the sorting result, and the working channel of the RFID reader is determined and allocated within the selectable channel frequency range according to the reading strength of the RFID reading unit in which the RFID reader is located.
In a further embodiment, according to the sorting result of the RFID reader, the more back the sorting is, the fewer the selectable channels are, and vice versa, the more the selectable channels are.
The working channel allocation method of the embodiment enables the RFID reader-writer to work in different frequency channels, reduces intersymbol interference between the reader-writers during communication of the reader-writers, and ensures the identification accuracy of the goods RFID label.
In a further embodiment, in step S101 in embodiment 4, elements of the channel spacing matrix may be represented by spacing theoretical values, and different spacing theoretical values are given to adjacent RFID readers and non-adjacent RFID readers, a process of constructing the matrix may be as follows:
the elements in the matrix are channel interval theoretical values of any two RFID readers, and the constructed channel interval matrix can be represented by the following formula:
Assigning values to each element in the matrix according to a set rule, because communication interference of adjacent readers is considered in the embodiment, assigning values to the adjacent RFID readers and non-adjacent RFID readers respectively, wherein a channel interval of the adjacent RFID readers is assigned with a first channel interval theoretical value, and a channel interval of the non-adjacent RFID readers is assigned with a second channel interval theoretical value, and the first channel interval theoretical value is usually greater than the second channel interval theoretical value so as to ensure that signal interference does not occur between the RFID readers.
Optionally, in a further embodiment, in step S103 in embodiment 4, the RFID readers may be sorted in an ascending order according to the summation result, where the earlier the reader with the smaller summation result is, the fewer the selectable channels are sorted, and otherwise, the more the selectable channels are.
It is easy to understand that, in the case of limited selectable channels, a smaller summation result indicates that the current reader is closer to other readers, which means more selectable channels, whereas a larger summation result indicates that the current reader is closer to other readers, which means less selectable channels.
The channel allocation method provided by the invention can effectively solve the problem of mutual interference of signals between the reader-writers when the plurality of RFID reader-writers work simultaneously, and ensure the accuracy of the identification and reading of the RFID label.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. An RFID identification lane device, comprising:
the system comprises a plurality of groups of antennas, a plurality of groups of photoelectric triggers, a plurality of groups of RFID readers-writers and a controller;
the photoelectric trigger and the RFID reader-writer are alternately arranged on the inner side of the channel equipment along the movement direction of goods in the channel equipment;
the antennas are arranged in the channel equipment, and each group of antennas is electrically connected with one group of RFID readers-writers;
the photoelectric trigger and the RFID reader-writer are electrically connected with the controller;
the radiation lobe of the antenna meets a set condition, so that a plurality of RFID reading areas which are not interfered with each other are formed in the channel of the channel equipment, and RFID non-readable areas are formed in the interval areas between the adjacent RFID reading areas;
each RFID reading area all has a set of RFID reading unit, and every group RFID reading unit includes a set of antenna, a set of photoelectric trigger and a set of RFID read write line, and multiunit RFID reading unit works simultaneously.
2. The RFID identification lane device of claim 1, wherein the antenna is circularly polarized and has a half power lobe width that satisfies a set lobe width condition.
3. The RFID identification lane device of claim 2, wherein the half power lobe width is set at ≦ 47 degrees.
4. The RFID identification lane device of claim 1, wherein the RFID reader is configured to:
the adjacent RFID readers have different uplink working speeds and different downlink working speeds.
5. The RFID identification lane device of claim 1, wherein the RFID reader is configured to:
adjacent RFID readers have different operating channels.
6. The RFID identification pathway device of claim 1, wherein the interior walls of the pathway device are coated with a wave absorbing material.
7. An allocation method for working channels of RFID readers, applied to the controller of the RFID identification channel device according to any one of claims 1 to 6, for allocating working channels to multiple groups of RFID readers in the RFID identification channel device according to any one of claims 1 to 6, includes:
constructing a channel interval matrix of the RFID reader-writer, wherein matrix elements are channel interval theoretical values of any two RFID reader-writers;
summing rows of the channel interval matrix respectively, and sequencing the RFID readers according to set sequencing conditions according to a summing result;
and distributing working channels to the RFID readers according to the sequencing result.
8. The method according to claim 7, wherein the constructing the RFID reader channel interval matrix comprises:
and assigning values to each element in the channel interval matrix according to a set rule.
9. The method according to claim 8, wherein the theoretical value of the channel interval is assigned to the channel interval between adjacent RFID readers, and the theoretical value of the channel interval is assigned to the channel interval between non-adjacent RFID readers.
10. The method according to claim 7, wherein the sorting the RFID readers according to the summation result and the set sorting condition includes:
and sorting the RFID readers in a descending or ascending order according to the summation result.
11. The method according to claim 7, wherein the allocating the working channels to the RFID readers according to the sorting result comprises:
determining the frequency range of the selectable channel of the RFID reader-writer according to the sequencing result;
and determining and distributing the working channel of the RFID reader-writer within the frequency range of the optional channel according to the reading strength of the RFID reading unit where the RFID reader-writer is located.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114708678A (en) * | 2022-04-26 | 2022-07-05 | 成都德杉科技有限公司 | RFID (radio frequency identification) channel door system based on multiple sensors and warehouse entry and exit method |
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| CN116306721B (en) * | 2023-03-22 | 2024-02-06 | 重庆大学附属三峡医院 | High-throughput RFID identification device and management system for medical supplies |
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| CN116957611B (en) * | 2023-09-18 | 2023-12-22 | 长沙睿展数据科技有限公司 | Batch goods inspection traceability equipment and system based on RFID |
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