CN103617407B - Double-wireframe-type dinner plate label reading device and method - Google Patents
Double-wireframe-type dinner plate label reading device and method Download PDFInfo
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Abstract
The invention relates to the technical field of radio frequency identification, and particularly relates to a double-wireframe-type dinner plate label reading device which can read labels of dinner plates accurately, and reduce the misreading rate and the jump-reading rate. The double-wireframe-type dinner plate label reading device is characterized by being provided with two matching circuits as well as two antennas which are in one-to-one correspondence connection with the matching circuits; output ends of the matching circuits are connected with the antennas; frame-type coils are adopted for coils of the antennas; an input end of each matching circuit is respectively connected with a radio frequency switching circuit; a control signal input end of the radio frequency switching circuit is connected with a micro control chip; a radio frequency signal input end of the radio frequency switching circuit is connected with a radio frequency signal transmitting circuit; the two antenna coils are partially overlapped. Compared with the prior art, the double-wireframe-type dinner plate label reading device disclosed by the invention has the advantages that the dinner plate labels can be read accurately, and the misreading rate and the jump-reading rate can be reduced.
Description
Technical field
The present invention relates to technical field of RFID, specifically a kind of accurate reading being capable of service plate label,
The service plate tag reader of two-wire box form reduce skip, altering reading rate and method.
Background technology
In recent years, food and drink clearing industry obtains fast-developing, traditional artificial clearing form, is all artificially vegetable to be carried out
Row operation is entered on computers again, this settlement method is not only time-consuming to take a lot of work after judging price, and often by objective factor
Lead to malfunction, can not meet the needs of practical application.Realize the quick reading of service plate using rfid technology, be food and drink row
The demand of industry, is capable of fully automated clearing, reduces clearing error rate, substantially increases the efficiency of clearing.But at present
Adopt single big antenna box form service plate antenna in service plate tag reader more, be primarily present two shortcomings, first, service plate
There is blind area in the middle of antenna, there is skip phenomenon: the service plate antenna in the form of single big antenna frame, due to service plate antenna area
Larger, magnetic field is more sparse in the intermediate distribution of antenna, when the big service plate label of reading Area comparison, reads distant,
Effect is preferable, but service plate label will be embedded in the bottom of service plate or bowl, and area is only button size, when the service plate sky of design
When line area is larger, in the middle of antenna, can there is blind area, it may appear that skip phenomenon during practical application, and the service plate antenna surface designing
When long-pending less, the reading distance of service plate label is near, can not meet again and be actually needed；Second, read range is uncontrollable, exists and alters reading
Phenomenon: when the Area comparison of service plate antenna is big, the magnetic field energy around service plate is stronger, can read beyond service plate antenna frame
Service plate label, leads to user's actual clearing value and real consumption value to have certain error, clearing error rate is higher, impact client's
Use, do not meet application request.
Content of the invention
The present invention is directed to shortcoming and defect present in prior art, proposes a kind of accurate reading being capable of service plate label
Take, reduction skip, the service plate tag reader of two-wire box form altering reading rate and method.
The present invention can be reached by following measures:
A kind of service plate tag reader of two-wire box form, is provided with microcontroller chip, emission of radio frequency signals circuit and penetrates
Frequency signal receiving circuit, match circuit and antenna, wherein microcontroller chip respectively with emission of radio frequency signals circuit and radiofrequency signal
Receiving circuit is connected it is characterised in that being provided with two-way match circuit and two skies being connected one to one with match circuit
Line, the output end of match circuit is connected with antenna, the coil of described antenna all using frame-type coil, every road match circuit defeated
Enter to hold Jun Yu mono- road radio-frequency switch circuit to be connected, the control signal input of radio-frequency switch circuit is connected with microcontroller chip,
The RF signal input end of radio-frequency switch circuit is connected with emission of radio frequency signals circuit, and two aerial coils partly overlap and put
Put.
In the present invention, radio-frequency switch circuit and match circuit are packaged together, and form matching module, rf signal reception electricity
Road is connected with the signal feedback end of matching module.
In the present invention, radio-frequency switch circuit and match circuit are packaged together, and form matching module, rf signal reception electricity
Road is connected with the signal feedback end of matching module.
Microcontroller chip of the present invention can be realized using arm, and microcontroller chip 1 is used for producing radiofrequency signal and antenna switching
Control signal, wherein radiofrequency signal are sent to matching module by radio frequency wire size line a via emission of radio frequency signals circuit, and antenna is cut
Change control signal and matching module is conveyed directly to by control signal wire.
In the present invention, matching module is provided with radio-frequency switch circuit, radio-frequency switch circuit and is connected with radio-frequency switch circuit
The match circuit that is connected with radio-frequency switch circuit of match circuit, wherein radio-frequency switch circuit and match circuit and radio frequency sky
Line a corresponds to, and radio-frequency switch circuit and match circuit are corresponding with radio-frequency antenna b.
Radio-frequency switch circuit in the present invention is used for completing the switching control to radio-frequency antenna, the antenna that microcontroller chip sends
Switch-over control signal is respectively sent to two-way radio-frequency switch circuit, synchronization by two path control signal line b, and two-way antenna switches
Control signal one tunnel is high level, and a road is low level, receives the radio-frequency switch circuit conducting of high-level control signal, controls
Corresponding radio-frequency antenna conducting, meanwhile, radiofrequency signal is sent to respective antenna.
Two-way match circuit in the present invention is used for carrying out impedance matching to corresponding radio-frequency antenna, will correspond to sky radio frequency line
Frequency resonance to 13.56m, output impedance is converted into 50 ω, thus ensureing radiofrequency signal that frequency read/write sends as far as possible
Many arrival radio-frequency antennas, and radiate by radio-frequency antenna.
Heretofore described emission of radio frequency signals circuit includes the modulation circuit being connected with microcontroller chip, with modulation circuit
The output end of the power amplification circuit that output end is connected, wherein power amplification circuit is connected with power distributing circuit, this
Bright described rf signal reception circuit includes the comparison decision circuit being connected with microcontroller chip, and output end is defeated with compare judgement
Enter and hold the demodulation circuit of intermediate frequency being connected, the envelope detection circuit that output end is connected with the input of demodulation circuit of intermediate frequency, its
Match circuit in the matched module of input of middle envelope detection circuit is connected with radio-frequency antenna.
In the present invention, two frame antenna coiler parts are overlapping, and are provided with metal shell outside antenna, because magnetic field can not
Through metal, can effectively suppress the distribution in magnetic field by metallic shield, prevent service plate antenna from reading beyond service plate antenna frame
Service plate label, thus efficiently solve service plate label alters reading problem.
The present invention is partly overlapped in the form of complementation using two antenna frames, and two antennas are designated as radio-frequency antenna a respectively and penetrate
Frequency antenna b, microcontroller chip controls radio-frequency switch circuit so that synchronization, only one of which Antenna Operation by control signal, penetrates
During frequency antenna a work, field region can cover certain altitude region above itself, and covers radio-frequency antenna b zone line, with
Reason, during radio-frequency antenna b work, field region can cover certain altitude region above itself, also can cover antenna a mesozone
Domain；Radio-frequency antenna a and the work of radio-frequency antenna b poll, mutually make up other side blind area, so that in the range of service plate antenna certain altitude
Field homogeneity, can read service plate label, no skip phenomenon at an arbitrary position；Radio-frequency antenna a and the overlapping region of radio-frequency antenna b
Overlapping region c, if weight area is excessive, two antennas read distant, easily cause and alter reading, if overlapping region face
Long-pending too small, then individual antenna intermediate void region can not be covered by another antenna it is preferred that the area of overlapping region is single
The 1/5-1/4 of individual antenna frame area.
A kind of using method of above-mentioned service plate tag reader is it is characterised in that comprise the following steps:
Step 1: system electrification, device completes the loading of master data, and microcontroller chip produces radiofrequency signal and antenna switching
Control signal；
Step 2: radiofrequency signal is sent to the radio-frequency switch circuit input in matching module by emission of radio frequency signals circuit,
Two-way antenna switch control signal is exported to matching module from microcontroller chip, two-way antenna switch control signal is in synchronization one
Road is high level, and another road is low level, receives the radio-frequency switch circuit conducting of high-level control signal, and then controls corresponding
Radio-frequency antenna conducting, one of antenna a and antenna b are in running order and to field emission radiofrequency signal to be detected；
Step 3: the low and high level of the two-way antenna switch control signal that microcontroller chip sends to matching module switches in turn,
Change the on off state of radio-frequency switch circuit in matching module, make antenna a and the work of antenna b poll it is ensured that in certain time period
Interior only one of which antenna launches radiofrequency signal, radio-frequency antenna a and the work of radio-frequency antenna b poll, mutually makes up other side blind area, thus
Make field homogeneity in the range of service plate antenna certain altitude, service plate label can be read at an arbitrary position.
Surrounded by metal-back due to outside service plate antenna in step 3 of the present invention, ensure that service plate antenna will not alter reading
Label on neighbouring service plate antenna, when labeled tableware is placed on service plate antenna, radiofrequency signal is able to detect that
Label in tableware, and this label information is sent back rf signal reception circuit by rf signal line.
The present invention compared with prior art, has the advantage that (1) service plate inner antenna no blind spot, no skip problem: meal
Disk antenna adopts the antenna frame of two overlapping complementary to replace single big antenna frame, using antenna handoff technique, makes two sky line wheels
Ask work, mutually make up other side blind area, so that field homogeneity in the range of service plate antenna certain altitude, can read at an arbitrary position
Pick-up disk label, no skip phenomenon.(2) adopt metal shell, no alter reading problem: surrounding outside service plate antenna frame has layer of metal
Shell, because magnetic field cannot pass through metal, can effectively suppress the distribution in magnetic field by metallic shield, prevent service plate antenna from reading
Service plate label to beyond service plate antenna frame, thus efficiently solve service plate label alters reading problem.
Brief description:
Accompanying drawing 1 is the circuit structure block diagram of the present invention；
Accompanying drawing 2 is the structural representation of two-wire box form antenna in the present invention；
Brief description: microcontroller chip 1, emission of radio frequency signals circuit 2, rf signal reception circuit 3, matching module 4, radio frequency
On-off circuit 5, radio-frequency switch circuit 6, match circuit 7, match circuit 8, metal shell 9, radio-frequency antenna a, radio-frequency antenna b, weight
Folded region c, radio frequency wire size line a, control signal wire b.
Specific embodiment:
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment 1:
As shown in Figure 1, the present invention proposes a kind of service plate tag reader of two-wire box form, is provided with microcontroller chip
1st, emission of radio frequency signals circuit 2 and rf signal reception circuit 3, microcontroller chip 1 respectively with emission of radio frequency signals circuit 2 and penetrating
Frequency signal receiving circuit 3 is connected it is characterised in that being additionally provided with input to pass through radio frequency wire size line a and emission of radio frequency signals circuit
The matching module 4 for completing the switching control to radio-frequency antenna and coupling that 2 output end is connected, right with matching module 4
The antenna a that should connect and antenna b, microcontroller chip 1 is connected with matching module by control signal wire b.
Microcontroller chip 1 of the present invention can be realized using arm, and microcontroller chip 1 is used for producing radiofrequency signal and antenna is cut
Change control signal, wherein radiofrequency signal is sent to matching module 4, sky by radio frequency wire size line a via emission of radio frequency signals circuit 2
Line switch-over control signal is conveyed directly to matching module 4 by control signal wire b.
In the present invention matching module 4 be provided with radio-frequency switch circuit 5, radio-frequency switch circuit 6 and with radio-frequency switch circuit 5 phase
The match circuit 8 that the match circuit 7 connecting is connected with radio-frequency switch circuit 6, wherein radio-frequency switch circuit 5 and match circuit 7
Corresponding with radio-frequency antenna a, radio-frequency switch circuit 6 and match circuit 8 corresponding with radio-frequency antenna b.
Radio-frequency switch circuit 5 in the present invention and radio-frequency switch circuit 6 are used for completing the switching control to radio-frequency antenna, micro-
The antenna switch control signal that control chip 1 sends is respectively sent to radio-frequency switch circuit 5 by two path control signal line b and radio frequency is opened
Close circuit 6, synchronization, two-way antenna switch control signal one tunnel is high level, a road is low level, receives high level control
The radio-frequency switch circuit conducting of signal processed, controls corresponding radio-frequency antenna conducting, meanwhile, radiofrequency signal is sent to respective antenna.
Match circuit 7 in the present invention and match circuit 8 are used for carrying out impedance matching to corresponding radio-frequency antenna, will correspond to
To 13.56m, output impedance is converted into 50 ω to the frequency resonance of its radio frequency line, thus ensureing the radio frequency letter that frequency read/write sends
Number arrival radio-frequency antenna as much as possible, and radiate by radio-frequency antenna.
Heretofore described emission of radio frequency signals circuit 2 includes the modulation circuit being connected with microcontroller chip 1, with modulation electricity
The output end of the power amplification circuit that road output end is connected, wherein power amplification circuit is connected with power distributing circuit, this
Invent the comparison decision circuit that described rf signal reception circuit 3 includes being connected with microcontroller chip, output end with compare judgement
The demodulation circuit of intermediate frequency that is connected of input, the envelope detection electricity that output end is connected with the input of demodulation circuit of intermediate frequency
Match circuit in the matched module of input 4 on road, wherein envelope detection circuit is connected with radio-frequency antenna.
Embodiment 2:
As shown in Fig. 2 the present invention proposes a kind of service plate tag reader of two-wire box form, including metal shell 9,
Matching module 4, radio-frequency antenna a, radio-frequency antenna b.
Described metal shell 9: surrounding outside service plate antenna frame has layer of metal shell, because magnetic field cannot pass through metal,
The distribution in magnetic field can effectively be suppressed by metallic shield, the service plate mark beyond preventing service plate antenna from reading service plate antenna frame
Sign, thus efficiently solve service plate label alters reading problem.
Described matching module 4, under the control action of control signal, completes the switching to radio-frequency antenna a and radio-frequency antenna b
Control and mate.
Described service plate antenna is in the form of two antenna frame overlapping complementary, including radio-frequency antenna a and radio-frequency antenna b, micro-
Control chip passes through control signal control radio-frequency switch circuit so that synchronization, only one of which Antenna Operation, radio-frequency antenna a work
When making, field region can cover certain altitude region above itself, and covers radio-frequency antenna b zone line, in the same manner, radio frequency sky
During line b work, field region can cover certain altitude region above itself, also can cover antenna a zone line；Radio-frequency antenna
A and the work of radio-frequency antenna b poll, mutually make up other side blind area, so that field homogeneity in the range of service plate antenna certain altitude,
Service plate label, no skip phenomenon can be read in optional position.
Described overlapping region c, is radio-frequency antenna a and the overlapping region of radio-frequency antenna b, if overlapping region area is excessive,
Then two antenna readings are distant, easily cause and alter reading, if overlapping region area is too small, individual antenna intermediate void area
Domain can not be covered by another antenna it is preferred that the area of overlapping region is the 1/5-1/4 of individual antenna frame area.
Embodiment 3:
The present invention also proposes a kind of using method of above-mentioned service plate tag reader it is characterised in that including following walking
Rapid:
Step 1: system electrification, device completes the loading of master data, and microcontroller chip produces radiofrequency signal and antenna switching
Control signal；
Step 2: radiofrequency signal is sent to the radio-frequency switch circuit input in matching module by emission of radio frequency signals circuit,
Two-way antenna switch control signal is exported to matching module from microcontroller chip, two-way antenna switch control signal is in synchronization one
Road is high level, and a road is low level, receives the radio-frequency switch circuit conducting of high-level control signal, and then controls corresponding
Radio-frequency antenna turns on, and one of antenna a and antenna b are in running order and to field emission radiofrequency signal to be detected；
Step 3: the low and high level of the two-way antenna switch control signal that microcontroller chip 1 sends to matching module 4 is cut in turn
Change, change the on off state of radio-frequency switch circuit in matching module, make antenna a and the work of antenna b poll it is ensured that sometime
Only one of which antenna transmitting radiofrequency signal in section, radio-frequency antenna a and the work of radio-frequency antenna b poll, mutually make up other side blind area, from
And make field homogeneity in the range of service plate antenna certain altitude, service plate label can be read at an arbitrary position.
Step 4: surrounded by metal-back due to outside service plate antenna, ensure that service plate antenna will not be altered and read neighbouring meal
Label on disk antenna, when labeled tableware is placed on service plate antenna, radiofrequency signal is able to detect that in tableware
Label, and this label information is sent back rf signal reception circuit by rf signal line.
The present invention compared with prior art, has the advantage that (1) service plate inner antenna no blind spot, no skip problem: meal
Disk antenna adopts the antenna frame of two overlapping complementary to replace single big antenna frame, using antenna handoff technique, makes two sky line wheels
Ask work, mutually make up other side blind area, so that field homogeneity in the range of service plate antenna certain altitude, can read at an arbitrary position
Pick-up disk label, no skip phenomenon.(2) adopt metal shell, no alter reading problem: surrounding outside service plate antenna frame has layer of metal
Shell, because magnetic field cannot pass through metal, can effectively suppress the distribution in magnetic field by metallic shield, prevent service plate antenna from reading
Service plate label to beyond service plate antenna frame, thus efficiently solve service plate label alters reading problem.
Claims (1)
1. a kind of service plate tag reader of two-wire box form, is provided with microcontroller chip, emission of radio frequency signals circuit and radio frequency
Signal receiving circuit, match circuit and antenna, wherein microcontroller chip are connect with emission of radio frequency signals circuit and radiofrequency signal respectively
Receive circuit and be connected it is characterised in that being provided with two-way match circuit and two antennas connecting one to one with match circuit,
The output end of match circuit is connected with antenna, and the coil of described antenna is all using frame-type coil, the input of every road match circuit
End Jun Yu mono- road radio-frequency switch circuit is connected, and the control signal input of radio-frequency switch circuit is connected with microcontroller chip, penetrates
The RF signal input end of frequency switching circuit is connected with emission of radio frequency signals circuit, and two aerial coils partly overlap placement；
Described microcontroller chip adopts arm to realize, and microcontroller chip is connected with emission of radio frequency signals circuit by rf signal line, micro-
Control chip is through control signal wire and matching module to being connected；
Described emission of radio frequency signals circuit includes the modulation circuit being connected with microcontroller chip, is connected with modulation circuit output end
Power amplification circuit, the output end of wherein power amplification circuit is connected with power distributing circuit, described rf signal reception
Circuit includes the comparison decision circuit being connected with microcontroller chip, the intermediate frequency solution that output end is connected with the input comparing judgement
Adjust circuit, the envelope detection circuit that output end is connected with the input of demodulation circuit of intermediate frequency, wherein envelope detection circuit defeated
Enter to hold the match circuit in matched module to be connected with radio-frequency antenna；
Two frame antenna coiler parts are overlapping, and are provided with metal shell outside antenna；
Partly overlapped using two aerial coils, the area of overlapping region is the 1/5-1/4 of individual antenna frame area；
The using method of service plate tag reader, comprises the following steps:
Step 1: system electrification, device completes the loading of master data, and microcontroller chip produces radiofrequency signal and antenna switching control
Signal；
Step 2: radiofrequency signal is sent to the radio-frequency switch circuit input in matching module by emission of radio frequency signals circuit, by micro-
Control chip exports two-way antenna switch control signal to matching module, and two-way antenna switch control signal on synchronization one tunnel is
High level, another road is low level, receives the radio-frequency switch circuit conducting of high-level control signal, and then control is penetrated accordingly
Frequency antenna turns on, and one of antenna a and antenna b are in running order and to field emission radiofrequency signal to be detected；
Step 3: the low and high level of the two-way antenna switch control signal that microcontroller chip sends to matching module switches in turn, changes
The on off state of radio-frequency switch circuit in matching module, makes antenna a and the work of antenna b poll it is ensured that in certain time period only
There are an antenna transmitting radiofrequency signal, radio-frequency antenna a and the work of radio-frequency antenna b poll, mutually make up other side blind area, so that meal
Field homogeneity in the range of disk antenna certain altitude, can read service plate label at an arbitrary position；
Surrounded by metal-back due to outside service plate antenna in step 3, ensure that service plate antenna will not be altered and read neighbouring service plate
Label on antenna, when labeled tableware is placed on service plate antenna, radiofrequency signal is able to detect that the mark in tableware
Sign, and this label information is sent back rf signal reception circuit by rf signal line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310668097.9A CN103617407B (en) | 2013-12-07 | 2013-12-07 | Double-wireframe-type dinner plate label reading device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310668097.9A CN103617407B (en) | 2013-12-07 | 2013-12-07 | Double-wireframe-type dinner plate label reading device and method |
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| CN103617407A CN103617407A (en) | 2014-03-05 |
| CN103617407B true CN103617407B (en) | 2017-01-18 |
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| CN201310668097.9A Active CN103617407B (en) | 2013-12-07 | 2013-12-07 | Double-wireframe-type dinner plate label reading device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105389605B (en) * | 2015-11-10 | 2018-07-31 | 威海北洋电气集团股份有限公司 | The three-dimensional channel device of special-shaped antenna |
| CN109701157B (en) * | 2017-12-29 | 2020-07-28 | 深圳硅基仿生科技有限公司 | Radio frequency signal detection device with detection coil and retina stimulator |
| CN109409484A (en) * | 2018-10-19 | 2019-03-01 | 威海北洋光电信息技术股份公司 | Double-round switchable layer Patcho antenna device based on RFID |
| CN109950684B (en) * | 2019-04-25 | 2024-09-06 | 北京紫光微电子系统有限公司 | Antenna array for long-distance reading non-contact smart card in large range and application method thereof |
| CN111144150B (en) * | 2019-12-05 | 2023-03-28 | 威海北洋光电信息技术股份公司 | Odd-even synchronization technology-based non-inductive book borrowing and returning channel support, and cascade device and method |
| CN113902077A (en) * | 2021-10-29 | 2022-01-07 | 深圳市明泰智能技术有限公司 | A non-contact reading device under the screen |
| CN114065793B (en) * | 2021-11-22 | 2024-11-15 | 新开普电子股份有限公司 | A plate card reader based on magnetic field coupling |
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| CN103617407A (en) | 2014-03-05 |
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