CN109859376A - A kind of city bus payment devices of the high reliablity based on block chain technology - Google Patents
A kind of city bus payment devices of the high reliablity based on block chain technology Download PDFInfo
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- CN109859376A CN109859376A CN201910163004.4A CN201910163004A CN109859376A CN 109859376 A CN109859376 A CN 109859376A CN 201910163004 A CN201910163004 A CN 201910163004A CN 109859376 A CN109859376 A CN 109859376A
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Abstract
The present invention relates to a kind of city bus payment devices of high reliablity based on block chain technology, including main body, display screen and mounting rod, identification mechanism is additionally provided in the main body, the identification mechanism includes the first driving assembly, transmission belt, second connecting rod, reader device, two first connecting rods, two support wheels, two connection components, two card inserting mouths and at least two rotating rollers, the main body is equipped with cleaning mechanism, the cleaning mechanism includes the second driving assembly, elevating lever, cleaning brush, two sliding blocks and two sliding slots, the city bus payment devices of the high reliablity based on block chain technology, data storage is carried out using block chain technology, so that data safety degree is high, the speed that bus card passes through card reader is controlled by identification mechanism, to improve the accuracy that card reader reads bus card, improve card reader Reliability, by cleaning mechanism drive cleaning brush display screen is cleaned, improve the clarity that display screen is shown.
Description
Technical field
The present invention relates to a kind of city bus payment devices of high reliablity based on block chain technology.
Background technique
Block chain technology is that algorithm of knowing together with storing data, using distributed node is verified using block linked data structure
Guarantee the safety of data transmission and access with more new data, in the way of cryptography, using by automatized script generation to generate
The intelligent contract of code composition programs the completely new distributed basis framework and calculation of one kind with operation data, is distributed
The new application mode of the computer technologies such as data storage, point-to-point transmission, common recognition mechanism, Encryption Algorithm.
The data safety degree of block chain technology is higher, and application is also very extensive, wherein just including payment devices application
Technical field.
The card reader of the prior art is typically all to use traditional data encryption mode, it is easy to loss of data is caused, and
And after the display screen of the card reader of the prior art is when passing through prolonged, a large amount of dust can be accumulated on display screen, from
And reduce the clarity that display screen is shown, to reduce the practicability of card reader, moreover, when the upper bus of people into
When row is swiped the card, sometimes it can cause card reader that can not effectively read bus card because of excessive velocities of swiping the card, to reduce
The reliability of card reader.
Summary of the invention
The technical problem to be solved by the present invention is for overcome the deficiencies in the prior art, providing a kind of based on block chain skill
The city bus payment devices of the high reliablity of art.
The technical solution adopted by the present invention to solve the technical problems is: a kind of high reliablity based on block chain technology
City bus payment devices, including main body, display screen and mounting rod, the mounting rod is vertically provided at the lower section of main body, described
The side of main body is arranged in display screen, and processor and memory, the processor and memory electrical connection are equipped in the main body,
The memory receives the block chain data of block chain link point write-in, and stores to block chain data；
Identification mechanism is additionally provided in the main body, the identification mechanism includes the first driving assembly, transmission belt, the second connection
Bar, reader device, two first connecting rods, two support wheels, two connection components, two card inserting mouths and at least two rotations
Roller, two card inserting mouths are separately positioned on the two sides of main body, are parallel to each other two-by-two between each rotating roller, and each rotating roller is successively uniformly cut with scissors
It connects in the inside of main body, the top of each rotating roller and two card inserting mouths are in same level height, two connection component difference
The top of the two sides of the inner wall of main body is set, and second connecting rod is horizontally disposed, the both ends difference of second connecting rod
It is connect with two connection components, the middle part of the lower section of the second connecting rod, two first connecting rods point are arranged in the reader device
It is not vertically provided at the two sides of the lower section of the second connecting rod, two support wheels are respectively hinged at the bottom end of two first connecting rods,
The bottom end of two support wheels and two card inserting mouths are in same level height, and first driving assembly is arranged in main body
The top of wall, one end of the transmission belt successively bypass the first driving assembly and two support wheels, and the both ends of the transmission belt are solid
Fixed connection；
The main body is equipped with cleaning mechanism, and the cleaning mechanism includes the second driving assembly, elevating lever, cleaning brush, two
A sliding block and two sliding slots, two sliding slots are vertically provided in main body, and two sliding slots are separately positioned on the two sides of display screen, and two
A sliding block is slidably connected with two sliding slots respectively, and the elevating lever is horizontally set between two sliding blocks, the cleaning brush setting
In the side of the close display screen of elevating lever, the top of main body, second driving assembly is arranged in second driving assembly
It is connect with elevating lever.
Preferably, transmission and storage in order to realize data, the processor is interior to be equipped with block catenary system, the block
Catenary system includes data Layer, network layer, common recognition layer, excitation layer, contract layer and application layer, and the block chain data source is in data
Layer.
Preferably, in order to improve the intelligence degree of card reader, the processor is single-chip microcontroller or PLC, the storage
Device includes memory database and disk database, and the memory database and disk database receive the write-in of block chain link point respectively
Block chain data, and block chain data are stored.
Preferably, in order to provide power to the transmission of transmission belt, first driving assembly includes the second motor and drive
The top of the inner wall of main body is arranged in driving wheel, second motor, and second motor and driving wheel are sequentially connected, the transmission
Band bypasses driving wheel.
Preferably, in order to make transmission belt be in tight state, the connection component includes slide bar, connecting sleeve and bullet
Spring, the slide bar are vertically provided at the top of the side of the inner wall of main body, and the connecting sleeve is set in the middle part of slide bar, described
Spring is set on slide bar, and the both ends of the spring are connect with the top of connecting sleeve and slide bar respectively, and the spring is in pressure
Contracting state.
Preferably, second driving assembly includes first motor, first in order to provide power to the lifting of elevating lever
The top of main body, one end of first drive rod and the first electricity is arranged in drive rod and the second drive rod, the first motor
The output shaft of machine is fixedly connected, and one end of the other end and the second drive rod of first drive rod is hinged, second transmission
The other end of bar is hinged on the middle part of elevating lever.
Preferably, in order to improve the cleaning effect to display screen, the elevating lever is equipped at least two nozzles.
Preferably, the sliding slot is dovetail groove, and the sliding block is matched with sliding slot, institute in order to improve the stability of sliding block
The inside of sliding slot is arranged in the one end for stating sliding block.
Preferably, being equipped at the top and bottom of the inner wall of the card inserting mouth to improve the anti-dust performance of card inserting mouth
Sealing strip.
Preferably, in order to improve the coefficient of friction of transmission belt, the making material of the transmission belt is rubber.
The invention has the advantages that being somebody's turn to do the city bus payment devices of the high reliablity based on block chain technology, use
Block chain technology carries out data storage, so that data safety degree is high, also, is somebody's turn to do the city of the high reliablity based on block chain technology
Public transport payment devices in city's can control the speed that bus card passes through inside card reader by identification mechanism, to improve brush
Card device reads the accuracy of bus card, improves the reliability of card reader, compared with existing identification mechanism, which passes through
Sealing strip inside card inserting mouth not only increases the anti-dust performance of card reader, while can stick by the public transport of card inserting mouth
Row cleaning, the accuracy for further improving card reader reading bus card moreover make cleaning brush or more by cleaning mechanism
It moves back and forth, to clean by cleaning brush to display screen, the clarity that display screen is shown is improved, with existing cleaner
Structure is compared, and the cleaning mechanism structure is simple, reduces the quantity of the mechanism-trouble point, to reduce the mechanism malfunction
Probability.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the block catenary system of the city bus payment devices of the high reliablity of the invention based on block chain technology
Systematic schematic diagram；
Fig. 2 is the peace of the cleaning mechanism of the city bus payment devices of the high reliablity of the invention based on block chain technology
Assembling structure schematic diagram；
Fig. 3 is the sliding block and sliding slot of the city bus payment devices of the high reliablity of the invention based on block chain technology
Attachment structure schematic diagram；
Fig. 4 is the knot of the identification mechanism of the city bus payment devices of the high reliablity of the invention based on block chain technology
Structure schematic diagram；
Fig. 5 is the structure of the card inserting mouth of the city bus payment devices of the high reliablity of the invention based on block chain technology
Schematic diagram；
In figure: 1. sliding blocks, 2. elevating levers, 3. nozzles, 4. cleaning brush, 5. first motors, 6. first drive rods, 7. second pass
Lever, 8. sliding slots, 9. display screens, 10. main bodys, 11. mounting rods, 12. card inserting mouths, 13. rotating rollers, 14. first connecting rods, 15.
Slide bar, 16. springs, 17. connecting sleeves, 18. driving wheels, 19. second motors, 20. transmission belts, 21. second connecting rods, 22.
Support wheel, 23. reader devices, 24. sealing strips.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
As shown in Figure 1, a kind of city bus payment devices of the high reliablity based on block chain technology, including main body 10,
Display screen 9 and mounting rod 11, the main body 10 is interior to be equipped with processor and memory, the processor and memory electrical connection, institute
It states memory and receives the block chain data of block chain link point write-in, and block chain data are stored, set in the processor
There is block catenary system, the block catenary system includes data Layer, network layer, common recognition layer, excitation layer, contract layer and application layer, institute
Block chain data source is stated in data Layer, the processor is single-chip microcontroller or PLC, and the memory includes memory database and magnetic
Disk database, the memory database and disk database receive the block chain data of block chain link point write-in respectively, and to area
Block chain data are stored.
In fact, processor is mainly used for handling data, and memory is stored for data, herein:
Data Layer encapsulates bottom data block and the technologies such as relevant data encryption and timestamp；
In fact, the block chain data that memory database and disk database receive or store come from data
Layer.
Network layer then includes distributed networking mechanism, data dissemination mechanism and data authentication mechanism etc.；
All kinds of common recognition algorithms of common recognition layer predominant package network node；
Economic factor is integrated into block chain technical system by excitation layer, main issuing mechanism including economic incentives and
Distribution mechanism etc.；
All kinds of scripts of contract layer predominant package, algorithm and intelligent contract, are the bases of block chain programmable features；
Application layer then encapsulates the various application scenarios and case of block chain.
As shown in Figure 2-5, a kind of city bus payment devices of the high reliablity based on block chain technology, the mounting rod
11 are vertically provided at the lower section of main body 10, and the side of main body 10 is arranged in the display screen 9；
As shown in figure 4, being additionally provided with identification mechanism in the main body 10, the identification mechanism includes the first driving assembly, passes
Dynamic band 20, the second connecting rod 21, reader device 23, two first connecting rod 14, two support wheel 22, two connection components, two
A card inserting mouth 12 and at least two rotating rollers 13, two card inserting mouths 12 are separately positioned on the two sides of main body 10, each rotating roller 13 it
Between be parallel to each other two-by-two, each rotating roller 13 is successively uniformly hinged on the inside of main body 10, and the top of each rotating roller 13 is inserted with two
Bayonet 12 is in same level height, and two connection components are separately positioned on the top of the two sides of the inner wall of main body 10, described
Second connecting rod 21 is horizontally disposed, and the both ends of second connecting rod 21 are connect with two connection components respectively, the card reading dress
The middle part for the lower section that 23 are arranged in the second connecting rod 21 is set, two first connecting rods 14 are vertically provided at the second connecting rod 21 respectively
Lower section two sides, two support wheels 22 are respectively hinged at the bottom end of two first connecting rods 14, the bottom end of two support wheels 22
It is in same level height with two card inserting mouths 12, the top of the inner wall of main body 10, institute is arranged in first driving assembly
The one end for stating transmission belt 20 successively bypasses the first driving assembly and two support wheels 22, and the both ends of the transmission belt 20 are fixed to be connected
It connects；
Under the action of two connection components, pass through the connection function of the second connecting rod 21 and two first connecting rods 14
Under, the stability of two support wheels 22 is improved, later under the supporting role of two support wheels 22, improves transmission belt 20
Stability, while under the action of two connection components, so that transmission belt 20 is in tight state, to further improve transmission
With 20 stability, transmission belt 20 is driven to be driven by the first driving assembly later, user is by bus card from one of plug-in card
Mouth 12 is inserted into the inside of main bodys 13, under the supporting role of each rotating roller 13, drives bus card along rotation by transmission belt 20
Roller 13 is mobile with certain speed, while being identified by reader device 23 to bus card, to improve bus card identification
Accuracy, improve the reliability of card reader, the bus card after the completion of card reading exits from another card inserting mouth 12 later, makes
User can take bus card away；
As shown in Fig. 2, the main body 10 is equipped with cleaning mechanism, the cleaning mechanism includes the second driving assembly, lifting
Bar 2,4, two sliding blocks 1 of cleaning brush and two sliding slots 8, two sliding slots 8 are vertically provided in main body 10, and two sliding slots 8 are distinguished
The two sides of display screen 9 are set, and two sliding blocks 1 are slidably connected with two sliding slots 8 respectively, and the elevating lever 2 is horizontally set on two
Between a sliding block 1, the side of the close display screen 9 of elevating lever 2, the second driving assembly setting is arranged in the cleaning brush 4
In the top of main body 10, second driving assembly is connect with elevating lever 2；
Under the action of two sliding slot 8, the stability of elevating lever 2 is improved by two sliding blocks 1, while making elevating lever 2
It can be moved up and down along sliding slot 8, provide power by the second driving assembly later, drive cleaning brush 4 remaining by elevating lever 2
It is mobile, display screen 9 is cleaned by cleaning brush 4 later, to improve the clarity of the display of display screen 9.
As shown in figure 4, first driving assembly includes the second motor 19 and driving wheel 18, second motor 19 is arranged
At the top of the inner wall of main body 10, second motor 19 is sequentially connected with driving wheel 18, and the transmission belt 20 bypasses driving wheel
18；
Driving wheel 18 is driven to rotate by the second motor 19, later by going driving wheel 18 that transmission belt 20 is driven to be driven, from
And drive bus card mobile by transmission belt 20.
As shown in figure 4, the connection component includes slide bar 15, connecting sleeve 17 and spring 16, the slide bar 15 is vertically set
The top in the side of the inner wall of main body 10 is set, the connecting sleeve 17 is set in the middle part of slide bar 15, and the spring 16 is arranged
On slide bar 15, the both ends of the spring 16 are connect with the top of connecting sleeve 17 and slide bar 15 respectively, and the spring 16 is in
Compressive state；
Under the supporting role of slide bar 15, the stability of the second connecting rod 21, Zhi Hou are improved by connecting sleeve 17
Under the action of spring 16, it is drivingly connected casing 17 and is moved down along slide bar 15, move down two support wheels 22, thus
Transmission belt 20 is set to be in tight state under the supporting role of driving wheel 18 and two support wheels 22.
As shown in Fig. 2, second driving assembly includes first motor 5, the first drive rod 6 and the second drive rod 7, it is described
The top of main body 10 is arranged in first motor 5, and one end of first drive rod 6 is fixedly connected with the output shaft of first motor 5,
The other end of first drive rod 6 and one end of the second drive rod 7 are hinged, and the other end of second drive rod 7 is hinged on
The middle part of elevating lever 2；
The rotation of the first drive rod 6 is driven by first motor 5, later under the transmission effect of the second drive rod 7, by the
One drive rod 6 drives elevating lever 2 to go up and down.
Preferably, the elevating lever 2 is equipped at least two nozzles 3 in order to improve the cleaning effect to display screen 9,
Alcohol can be sprayed on display screen 9 by nozzle 3, cleaned later by cleaning brush 4, so that it is right to improve cleaning brush 4
The cleaning effect of display screen 9.
Preferably, the sliding slot 8 is dovetail groove in order to improve the stability of sliding block 1, the sliding block 1 with sliding slot 8
Match, the inside of sliding slot 8 is arranged in one end of the sliding block 1, since the connection structure of dovetail groove is relatively stable, to improve cunning
The stability that slot 8 is connect with sliding block 1.
Preferably, in order to improve the anti-dust performance of card inserting mouth 12, the top and bottom of the inner wall of the card inserting mouth 12 are equal
Equipped with sealing strip 24, card inserting mouth 12 is blocked by sealing strip 24, so that reducing dust enters probability inside card inserting mouth 12,
The sundries on bus card can be cleaned by sealing strip 24 simultaneously.
Preferably, the making material of the transmission belt 20 is rubber in order to improve the coefficient of friction of transmission belt 20, due to
Rubber has biggish coefficient of friction, to increase the frictional force between transmission belt 20 and bus card.
Under the action of two connection components, so that transmission belt 20 is in tight state, improves the stability of transmission belt 20,
Transmission belt 20 is driven to be driven by the first driving assembly, user is by bus card out of one of card inserting mouth 12 insertion main body 13
Portion drives bus card to move along rotating roller 13 with certain speed under the supporting role of each rotating roller 13 by transmission belt 20
It is dynamic, while bus card is identified by reader device 23, to improve the accuracy of bus card identification, improves and swipe the card
The reliability of device, provides power by the second driving assembly, drives cleaning brush 4 to move down by elevating lever 2, later by clear
4 pairs of display screens 9 of clean brush clean, to improve the clarity of the display of display screen 9.
Compared with prior art, the city bus payment devices of the high reliablity based on block chain technology are somebody's turn to do, identification is passed through
Mechanism can control the speed that bus card passes through inside card reader, so that the accuracy that card reader reads bus card is improved,
The reliability for improving card reader, compared with existing identification mechanism, the identification mechanism is by the sealing strip inside card inserting mouth 12, no
The anti-dust performance of card reader is improved only, while the bus card by card inserting mouth 12 can be cleaned, is further improved
The accuracy that card reader reads bus card moreover moves back and forth up and down cleaning brush 4 by cleaning mechanism, to pass through
Cleaning brush 4 cleans display screen 9, improves the clarity of the display of display screen 9, compared with existing cleaning mechanism, the cleaning
Mechanism structure is simple, reduces the quantity of the mechanism-trouble point, to reduce the probability of the mechanism malfunction.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of city bus payment devices of the high reliablity based on block chain technology, including main body (10), display screen (9) and
Mounting rod (11), the mounting rod (11) are vertically provided at the lower section of main body (10), and the display screen (9) is arranged in main body (10)
Side, which is characterized in that processor and memory, the processor and memory electrical connection are equipped in the main body (10),
The memory receives the block chain data of block chain link point write-in, and stores to block chain data；
Identification mechanism is additionally provided in the main body (10), the identification mechanism includes the first driving assembly, transmission belt (20), second
Connecting rod (21), reader device (23), two first connecting rods (14), two support wheels (22), two connection components, two insert
Bayonet (12) and at least two rotating rollers (13), two card inserting mouths (12) are separately positioned on the two sides of main body (10), each rotating roller
(13) it is parallel to each other two-by-two between, each rotating roller (13) is successively uniformly hinged on the inside of main body (10), each rotating roller (13)
Top and two card inserting mouths (12) are in same level height, and two connection components are separately positioned on the inner wall of main body (10)
The top of two sides, second connecting rod (21) is horizontally disposed, and the both ends of second connecting rod (21) are connect with two respectively
Component connection, the reader device (23) are arranged in the middle part of the lower section of the second connecting rod (21), two first connecting rods (14)
It is vertically provided at the two sides of the lower section of the second connecting rod (21) respectively, two support wheels (22) are respectively hinged at two first connections
The bottom end of bar (14), the bottom end of two support wheels (22) and two card inserting mouths (12) are in same level height, and described first
Driving assembly be arranged main body (10) inner wall top, one end of the transmission belt (20) successively bypass the first driving assembly and
The both ends of two support wheels (22), the transmission belt (20) are fixedly connected；
The main body (10) is equipped with cleaning mechanism, and the cleaning mechanism includes the second driving assembly, elevating lever (2), cleaning brush
(4), two sliding blocks (1) and two sliding slots (8), two sliding slots (8) are vertically provided on main body (10), two sliding slots (8) point
It She Zhi not be slidably connected respectively with two sliding slots (8) in the two sides of display screen (9), two sliding blocks (1), elevating lever (2) water
Flat to be arranged between two sliding blocks (1), the cleaning brush (4) is arranged in the side of the close display screen (9) of elevating lever (2), institute
It states the second driving assembly to be arranged in the top of main body (10), second driving assembly is connect with elevating lever (2).
2. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, which is characterized in that
Block catenary system is equipped in the processor, the block catenary system includes data Layer, network layer, common recognition layer, excitation layer, contract
Layer and application layer, the block chain data source is in data Layer.
3. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, which is characterized in that
The processor is single-chip microcontroller or PLC, and the memory includes memory database and disk database, the memory database and
Disk database receives the block chain data of block chain link point write-in respectively, and stores to block chain data.
4. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, which is characterized in that
First driving assembly includes the second motor (19) and driving wheel (18), and second motor (19) is arranged in main body (10)
The top of inner wall, second motor (19) and driving wheel (18) are sequentially connected, and the transmission belt (20) bypasses driving wheel (18).
5. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, which is characterized in that
The connection component includes slide bar (15), connecting sleeve (17) and spring (16), and the slide bar (15) is vertically provided at main body
(10) top of the side of inner wall, the connecting sleeve (17) are set in the middle part of slide bar (15), and the spring (16) is arranged
On slide bar (15), the both ends of the spring (16) are connect with the top of connecting sleeve (17) and slide bar (15) respectively, the bullet
Spring (16) is in compressive state.
6. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, which is characterized in that
Second driving assembly includes first motor (5), the first drive rod (6) and the second drive rod (7), the first motor (5)
Top in main body (10) is set, and one end of first drive rod (6) is fixedly connected with the output shaft of first motor (5), institute
The one end for stating the other end and the second drive rod (7) of the first drive rod (6) is hinged, the other end hinge of second drive rod (7)
Connect the middle part in elevating lever (2).
7. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, which is characterized in that
The elevating lever (2) is equipped at least two nozzles (3).
8. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, which is characterized in that
The sliding slot (8) is dovetail groove, and the sliding block (1) matches with sliding slot (8), and one end of the sliding block (1) is arranged in sliding slot (8)
It is internal.
9. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, which is characterized in that
Sealing strip (24) are equipped at the top and bottom of the inner wall of the card inserting mouth (12).
10. the city bus payment devices of the high reliablity as described in claim 1 based on block chain technology, feature exist
In the making material of the transmission belt (20) is rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163004.4A CN109859376A (en) | 2019-03-05 | 2019-03-05 | A kind of city bus payment devices of the high reliablity based on block chain technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163004.4A CN109859376A (en) | 2019-03-05 | 2019-03-05 | A kind of city bus payment devices of the high reliablity based on block chain technology |
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| Publication Number | Publication Date |
|---|---|
| CN109859376A true CN109859376A (en) | 2019-06-07 |
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ID=66899843
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910163004.4A Withdrawn CN109859376A (en) | 2019-03-05 | 2019-03-05 | A kind of city bus payment devices of the high reliablity based on block chain technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111581629A (en) * | 2020-06-04 | 2020-08-25 | 合肥市轨道交通集团有限公司 | Rail transit comprehensive monitoring system for card swiping login and operation method |
-
2019
- 2019-03-05 CN CN201910163004.4A patent/CN109859376A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111581629A (en) * | 2020-06-04 | 2020-08-25 | 合肥市轨道交通集团有限公司 | Rail transit comprehensive monitoring system for card swiping login and operation method |
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Application publication date: 20190607 |