CN107886021A - The reader device of different reading ranges and supporting radio-frequency card are obtained by adjusting Card Reader distance - Google Patents

The reader device of different reading ranges and supporting radio-frequency card are obtained by adjusting Card Reader distance Download PDF

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Publication number
CN107886021A
CN107886021A CN201710992900.2A CN201710992900A CN107886021A CN 107886021 A CN107886021 A CN 107886021A CN 201710992900 A CN201710992900 A CN 201710992900A CN 107886021 A CN107886021 A CN 107886021A
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China
Prior art keywords
radio
card
reader
frequency card
frequency
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CN201710992900.2A
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Chinese (zh)
Inventor
孙倩倩
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Shanghai Patento Business Consultation Co Ltd
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Shanghai Patento Business Consultation Co Ltd
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Publication of CN107886021A publication Critical patent/CN107886021A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009Methods 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
    • G06K7/10019Methods 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.
    • G06K7/10079Methods 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 spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
    • G06K7/10089Methods 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 spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision
    • G06K7/10099Methods 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 spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision the directional field being used for pinpointing the location of the record carrier, e.g. for finding or locating an RFID tag amongst a plurality of RFID tags, each RFID tag being associated with an object, e.g. for physically locating the RFID tagged object in a warehouse
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009Methods 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
    • G06K7/10118Methods 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 the sensing being preceded by at least one preliminary step
    • G06K7/10128Methods 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 the sensing being preceded by at least one preliminary step the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009Methods 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
    • G06K7/10366Methods 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 the interrogation device being adapted for miscellaneous applications
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009Methods 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
    • G06K7/10297Methods 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 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009Methods 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
    • G06K7/10118Methods 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 the sensing being preceded by at least one preliminary step
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0252Radio frequency fingerprinting
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/12Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009Methods 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
    • G06K7/10316Methods 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Artificial Intelligence (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Localization method based on radio-frequency technique is related to technical field of RFID,The reader device of different reading ranges is obtained by adjusting Card Reader distance,Including radio-frequency card read module and card reader antenna,It is characterized in that,The card reader antenna is a radiation intensity or the adjustable card reader antenna of radiant power,The radio-frequency card read module is the adjustable radio-frequency card read module of a signal receiving sensitivity,Continuously adjust the Card Reader distance of reader device,Obtain the reading range of consecutive variations,Record radio-frequency card appears or disappears the Card Reader distance of reader device when in scanning range for the first time,Then it is located at by the article of radio-frequency card sign using the position of reader device as the center of circle,Using Card Reader distance plus △ as radius,Circle in,And positioned at using the position of reader device as the center of circle,△ is subtracted as radius using Card Reader distance,Circle outside,For the uncertainty of reading range position caused by by external interference.

Description

The reader device of different reading ranges and supporting is obtained by adjusting Card Reader distance Radio-frequency card
The applying date of the original application of the divisional application is:On October 08th, 2012, Application No.:2012103800226, name Referred to as:Radio-frequency card transboundary localization method.
Technical field
The present invention relates to technical field of RFID, more particularly to a kind of radio frequency positioning method.
Background technology
REID is RFID technique, also known as electronic tag, radio RF recognition technology, is a kind of communication technology, Specific objective can be identified by radio signals and reads and writes related data, without establishing machine between identifying system and specific objective Tool or optical contact.
RFID technique is widely used in various fields, such as logistics and supplies management, the manufacturing and assembling, aviation The fields such as luggage processing, mail/fast freight parcel processing, document tracking/library management, animal identification mark.
In radio-frequency card positions scanning system, radio-frequency card and reader device are generally included, radio-frequency card is placed on the test object, Reader device setting is multiple, for detecting radio frequency card position.Above-mentioned position positioning method, in order to accurately determine the position of measured object Put, it is necessary to which numerous card reader is completed to position, cost is higher, detection time length.
The content of the invention
It is an object of the present invention to provide a kind of reader device, to solve above-mentioned technical problem.
The present invention also aims to, there is provided a kind of radio-frequency card, supported the use with reader device.
Technical problem solved by the invention can be realized using following technical scheme:
The reader device of different reading ranges, including radio-frequency card read module and reading are obtained by adjusting Card Reader distance Card device antenna, it is characterised in that the card reader antenna is a radiation intensity or the adjustable card reader antenna of radiant power, described Radio-frequency card read module is the adjustable radio-frequency card read module of a signal receiving sensitivity, continuously adjust the Card Reader of reader device away from From obtaining the reading ranges of consecutive variations, record radio-frequency card appears or disappears reader device when in scanning range for the first time Card Reader distance, then it is located at by the article of radio-frequency card sign using the position of reader device as the center of circle, using Card Reader distance plus △ as radius, Circle in, and positioned at using the position of reader device as the center of circle, △ is subtracted as radius using Card Reader distance, circle outside,
△ is the uncertainty of reading range position caused by by external interference.
Radio-frequency card, it is characterised in that including at least one positioning radio-frequency card, and at least one sign radio-frequency card;With described fixed Position radio-frequency card is indicated as positioning datum with indicating radio-frequency card to article;
The positioning radio frequency card position is relatively fixed, and can be known to position.
Localization method based on radio-frequency technique, it is characterised in that the reading range of adjustment radio frequency card card-reading devcie, according to institute The presence or absence of radio-frequency card situation in the reading range and corresponding reading range of reader device is stated, obtains the position model of the radio-frequency card Enclose, and then obtain the Position Approximate of the article indicated by the radio-frequency card.
As a kind of preferred scheme, different reading ranges can be obtained by mobile reader device.
Step 1, article is indicated using radio-frequency card;
Step 2, reader device is moved along any direction, the reading range of reader device with reader device movement without Disconnected change, record radio-frequency card appears or disappears the position of reader device when in scanning range for the first time, if the position is A, such as To appear in for the first time in scanning range, former direction continues to move to reader device, and record radio-frequency card disappears in scanning model for the first time The position of reader device when enclosing interior, if the position is B, then radio-frequency card near the perpendicular bisector of position A and position B lines,
Such as to disappear in for the first time in scanning range, opposite direction continues to move to reader device, and record radio-frequency card disappears for the second time The position in scanning range is lost, if the position is C,
Then by the article of radio-frequency card sign near the perpendicular bisector of position A and position C lines;
Step 3, reader device is moved along perpendicular bisector, when record radio-frequency card is appeared or disappeared in scanning range for the first time The position of reader device, then such as it is the by the article of radio-frequency card sign in a circle if the Card Reader distance of reader device be X Once appear in scanning range, the circle is using apart from position of the reader device as X to be the center of circle in front of moving direction, using △ for partly Footpath,
Such as to disappear in for the first time in scanning range, the circle is using using position of the moving direction rear apart from reader device as X For the center of circle, using △ as radius,
△ is the uncertainty of reading range position caused by by external interference.
, can be by the Card Reader model that adjusts the Card Reader distance of reader device to obtain different as another preferred scheme Enclose.
The reader device includes radio-frequency card read module and card reader antenna.The reader device can be a Card Reader away from From the reader device of continuously adjustabe.The card reader antenna can be a radiation intensity or the adjustable card reader day of radiant power Line.The radio-frequency card read module can be the adjustable radio-frequency card read module of a signal receiving sensitivity.
The Card Reader distance of reader device is continuously adjusted, obtains the reading range of consecutive variations, record radio-frequency card goes out for the first time Card Reader distance that is existing or disappearing in reader device when in scanning range, then be located at reader device by the article of radio-frequency card sign Position is the center of circle, using Card Reader distance plus △ as radius, circle in, and positioned at using the position of reader device as the center of circle, with Card Reader away from Be radius from △ is subtracted, circle outside,
△ is the uncertainty of reading range position caused by by external interference.
In order to improve precision degree, radio-frequency card includes at least one positioning radio-frequency card, and at least one sign radio-frequency card;With described Radio-frequency card is positioned as positioning datum, article is indicated with indicating radio-frequency card;
The positioning radio frequency card position is relatively fixed, and can be known to position.It can be unknown to indicate radio frequency card position, led to The relative position that above technology determines sign radio-frequency card is crossed, and then obtains the position for the article for being labeled radio-frequency card sign.
The reading range of reader device is adjusted, according to whether sign radio-frequency card can be read, position the combination letter of radio-frequency card Breath obtains position of the sign radio-frequency card relative to positioning radio-frequency card, and positioning radio frequency card position is relatively fixed, and can be known to position. And then the Position Approximate for the article for being labeled radio-frequency card sign is obtained according to the positional information of positioning radio-frequency card.
The radio-frequency card read module of reader device connects a microprocessor system, and microprocessor system controls the reading The Card Reader distance change of card device, the excursion of Card Reader distance position radio-frequency card position across described.Adjust Card Reader dress The Card Reader distance put, reader device because structural relation, adjust Card Reader apart from when, its radiation mode is not often with place Centered on position, concentric circles state is formed.Under the same state of reader device, the often direction Card Reader distance of the positive direction of antenna Farthest, toward both sides extension, then Card Reader distance is gradually shortened.
The curve that maximum reading range of the reader device under same state is formed is named as Card Reader potential field line.Card Reader fills Put adjust Card Reader apart from when, a plurality of Card Reader potential field line can be formed.In the case where external interference is not very strong, a plurality of Card Reader gesture Layered laminate is presented in field wire.Described in this patent sign radio-frequency card and position radio-frequency card between distance relation, be not sometimes with Absolute distance between reader device or card reader antenna, but the layered relationship of a plurality of Card Reader potential field line.
It is described micro- when can read the positioning radio-frequency card in reader device, but sign radio-frequency card can not be read Type processor system is recorded as the sign radio-frequency card and is more than the positioning with the distance between reader device or card reader antenna The distance of radio-frequency card, or be recorded as not in Card Reader signal cover.
It is described micro- when can read the sign radio-frequency card in reader device, but positioning radio-frequency card can not be read Type processor system is recorded as the sign radio-frequency card and is less than the positioning with the distance between reader device or card reader antenna The distance of radio-frequency card.
It is identified because the transmission or reception work of signal, are completed by card reader antenna when relative position determines Relative position can be used as object of reference using card reader antenna position greatly.When reader device is built-in with card reader antenna, also may be used To be used as object of reference using reader device.
The positioning radio-frequency card can be read in reader device, and Card Reader distance is arranged to maximum, but still not When can read sign radio-frequency card, the microprocessor system is recorded as the sign radio-frequency card and reader device or card reader The distance between antenna is more than Card Reader distance, or is recorded as not in Card Reader signal cover.
Using the positional information of the positioning radio-frequency card as reference position, it can substantially determine that sign is penetrated by above-mentioned technology Frequency card is determined by the position of the article of the sign radio-frequency card sign relative to the position for positioning radio-frequency card.
In order that accurate positioning, the positioning radio-frequency card is preferably provided with identical parameter with the sign radio-frequency card, including Placed angle, power parameter, sensitivity parameter, antenna parameter etc., in order to the sound made to the radiation information of card reader antenna Should with apart from directly related, to improve positioning precision.
Radio-frequency card quantity is positioned by increasing, precision can be increased.Including at least two positioning radio-frequency cards, it is respectively Radio-frequency card one, positioning radio-frequency card two are positioned, positioning radio-frequency card one, positioning radio-frequency card two are different from the distance between card reader antenna; The distance set between position radio-frequency card one and card reader antenna is nearer than positioning radio-frequency card two, and all reader device maximum Card Reader away from From interior;Preferably position radio-frequency card one, positioning radio-frequency card two is located at the different position of card reader antenna radiation intensity;Adjust Card Reader dress The Card Reader distance put, obtained according to whether sign radio-frequency card, positioning radio-frequency card one, the combined information of positioning radio-frequency card two can be read Position of the radio-frequency card relative to positioning radio-frequency card must be indicated.
Microprocessor system controls the Card Reader distance of reader device, is less than in Card Reader distance with positioning the spacing of radio-frequency card one From when, if sign radio-frequency card can be read, the microprocessor system is recorded as the sign radio-frequency card and card reader The distance between antenna is less than the distance of the positioning radio-frequency card one.
Microprocessor system control reader device Card Reader distance be less than or equal to positioning radio-frequency card one between apart from when, no The sign radio-frequency card can be read;Microprocessor system control reader device Card Reader distance, Card Reader distance be more than with Position radio-frequency card one between distance, less than positioning radio-frequency card two between apart from when, it is described micro- if sign radio-frequency card can be read Type processor system is recorded as sign the distance between the radio-frequency card and card reader antenna and is less than the positioning radio-frequency card two Distance, but it is greater than and positions distance between radio-frequency card one.
Microprocessor system controls the Card Reader distance of reader device, is less than or equal in Card Reader distance with positioning radio-frequency card two Between distance, it is impossible to read the sign radio-frequency card;The Card Reader distance of microprocessor system control reader device is read to maximum Card apart from when, if sign radio-frequency card can be read, the microprocessor system is recorded as the sign radio-frequency card and Card Reader The distance between device antenna is more than the distance of the positioning radio-frequency card two, but is less than the maximum Card Reader distance.
Microprocessor system control reader device Card Reader distance, reach maximum Card Reader apart from when, still can not read To the sign radio-frequency card;The microprocessor system is recorded as sign the distance between the radio-frequency card and card reader antenna More than Card Reader distance, or it is recorded as not in Card Reader signal cover.
By above-mentioned technical proposal the like, it is seen that the quantity of radio-frequency card is positioned by increasing, positioning precision can be strengthened.
The mode of the Card Reader distance of microprocessor system control reader device, can change card reader antenna radiation by force The mode of degree or radiant power, adjusts Card Reader distance by way of the intensity for changing transmission of electromagnetic signals;It can also be change The mode of reader-signal receiving sensitivity, Card Reader distance is adjusted by way of changing signal receiving sensitivity.
A Card Reader distance change trend is set, can Card Reader distance is gradually become by closely becoming remote Card Reader distance change Gesture, or make Card Reader distance by far gradually becoming near Card Reader distance change trend.Become by a Card Reader distance change determined Gesture, simplify scanning process.In order that radio-frequency card can be responded accurately in scanning process, it should suitably slow down sweep speed, to penetrating Frequency card reserves the response time.
The microprocessor system controls the reader device to be scanned the positioning radio-frequency card of surrounding, records When scanning to the newly-increased positioning radio-frequency card or newly losing the positioning radio-frequency card of information, the spoke of card reader antenna is recorded Penetrate intensity or reader-signal receiving sensitivity, and by the radiation intensity of the card reader antenna or reader-signal receiving sensitivity Associated with the positioning radio-frequency card.So as to record the radiation intensity or card reader of card reader antenna corresponding to each positioning radio-frequency card Signal receiving sensitivity, so as to form Card Reader apart from relevant parameter.Radio frequency of the above-mentioned work preferably at least in first time to surrounding Card performs when being scanned, and it is often longer to perform the time that above-mentioned work is spent.System generally requires after work a period of time Calibrated, above-mentioned work can be performed in calibration.
In scanning process, the microprocessor system calls the Card Reader to control the Card Reader apart from relevant parameter Device according to the Card Reader apart from relevant parameter, the saltus step scanning between Card Reader distance associate each positioning radio-frequency card distance, So as to greatly improve sweep speed.Above-mentioned saltus step scanning performs in normal work, to improve the efficiency usually to work.
When the microprocessor system calls the Card Reader apart from relevant parameter, to the spoke of described card reader antenna Intensity or reader-signal receiving sensitivity are penetrated, increases and scanning surplus, in order to which response environment changes caused disturb.Can be with Radiation intensity or reader-signal receiving sensitivity parameter to a card reader antenna strengthen a surplus, weaken a surplus, or Increase by a surplus simultaneously and weaken a surplus and form a small scanning range.
The reader device in a shell, forms radio-frequency card positioning scanning system with the microprocessor system System, the shell are provided with a Handheld Division, form a hand-held radio-frequency card positioning scanning system.Battery can be set in shell, Power supply is provided for system.
The hand-held radio-frequency card positioning scanning system can use a hand-held press proof formula.
The reader device is provided with least two card reader antennas, in order to determine the coordinate value more than one-dimensional.The reading Card device adjusted by way of the intensity for changing transmission of electromagnetic signals Card Reader apart from when, used at least two card reader Antenna, time-sharing work, in order to avoid cause mutual signal interference.
The reader device is provided with two card reader antennas, and the reading range of two card reader antennas, which exists, to be overlapped. It can determine to indicate the two-dimensional coordinate of radio-frequency card by polar mode.
Two card reader antennas of the reader device, respectively positioned at two corners of scanning space.
For the scanning space that space is larger, card reader antenna can be set in four corners respectively.
Two card reader antennas of the reader device are arranged in plane parallel to the ground, for determining in space Indicate the two-dimensional spatial location of radio-frequency card.
The reader device is provided with least three card reader antennas, and the scanning direction of three card reader antennas is not positioned at same Plane, and reading range is in the presence of overlapping.The three-dimensional space position of sign radio-frequency card is determined by least three card reader antennas.
The microprocessor system of the radio-frequency card positioning scanning system is also associated with a display, the microprocessor A spatial model corresponding with the spatial entities for needing to scan is had in system, the positioning radio frequency is distributed with spatial entities Card, the spatial distribution position of the positioning radio-frequency card are indicated in the spatial model.
Can artificially indicate by the work in the spatial distribution location mark to spatial model of new positioning radio-frequency card, It can also be the relative position for confirming new positioning radio-frequency card according to the position relationship of existing positioning radio-frequency card by spacescan Put, rower of going forward side by side shows.The microprocessor system is connected with a keyboard or a touch-screen, in order to artificially input information.
By the way that positioning radio-frequency card is associated with spatial model, the radio-frequency card is positioned to the scanning work image of scanning system Visualization.It is user-friendly.
When the radio-frequency card positioning scanning system scanning is to sign radio-frequency card, according to the sign radio-frequency card and positioning radio frequency Position relationship between card, it is determined that relative position of the sign radio-frequency card in space, and relative position is corresponded in spatial model, Shown or stored.In order to which user uses.
The radio-frequency card positioning scanning system also includes a camera, and spatial entities image is absorbed by the camera, Spatial entities image is used to establish spatial model.Picture that can be using entity space image as spatial model, or pass through Microprocessor system is incorporated in spatial model after further handling.
The antenna of the radio-frequency card uses Trinity antenna, in order to receive the signal of all directions, also allows for simultaneously Signal is sent to all directions.
The antenna distance of at least two positioning radio-frequency cards is fixed, and forms a positioning radio-frequency card group, and the reader device exists Adjust Card Reader apart from when, it may appear that two states for changing respectively of positioning radio frequency card signal, microprocessor system record When two positioning radio-frequency cards change respectively, the radiation intensity of reader device;Microprocessor system is to two radiation intensity Or reader-signal receiving sensitivity is contrasted, and the antenna distance of two positioning radio-frequency cards is called, two positioning are penetrated The antenna spacing of frequency card is the change of Card Reader distance in change in radiation intensity or reader-signal receiving sensitivity change procedure Change value.
Microprocessor system obtains the corresponding relation of change in radiation intensity and Card Reader distance, because electromagenetic wave radiation changes With linear characteristic, therefore draw the antennas of two positioning radio-frequency cards corresponding to the radiation intensity value during change in radiation intensity Between distance value, so as to more it is accurate determine indicate radio-frequency card position.
If the distance between the antenna of two positioning radio-frequency cards is L, change in radiation intensity value is N.If in change in radiation intensity Be worth for D when, there is sign radio frequency card signal to change, then the distance indicated between radio-frequency card and one of positioning radio-frequency card is about X=D*L/N.It is not the linear relation of standard because the linear relationship presented, therefore radio-frequency card is indicated in accurate calculate , it is necessary to be modified to calculating during particular location.It may need to call aerial radiation strength distributing information, surrounding to disturb during amendment The information such as source information.
Positioning radio-frequency card that antenna distance is fixed and known can be three or more than three, in order to accurately fixed Position.
Brief description of the drawings
Fig. 1 is that radio-frequency card positions scanning system structural representation;
Fig. 2 is a kind of device position relational structure schematic diagram of the present invention;
Fig. 3 is another device position relational structure schematic diagram of the present invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below Conjunction, which is specifically illustrating, is expanded on further the present invention.
The reader device of different reading ranges, including radio-frequency card read module and reading are obtained by adjusting Card Reader distance Card device antenna, card reader antenna is a radiation intensity or the adjustable card reader antenna of radiant power, radio-frequency card read module are one The adjustable radio-frequency card read module of signal receiving sensitivity, continuously adjusts the Card Reader distance of reader device, obtains consecutive variations Reading range, record radio-frequency card appears or disappears the Card Reader distance of reader device when in scanning range for the first time, then by radio frequency Card sign article be located at using the position of reader device as the center of circle, using Card Reader distance plus △ as radius, circle in, and positioned at read The position of card device is the center of circle, subtracts △ as radius using Card Reader distance, circle outside, be reading range position caused by by external interference Uncertainty.
Radio-frequency card, including at least one positioning radio-frequency card, and at least one sign radio-frequency card;To position radio-frequency card as positioning Benchmark, article is indicated with indicating radio-frequency card;Positioning radio frequency card position is relatively fixed, and can be known to position.
Localization method based on radio-frequency technique, the reading range of radio frequency card card-reading devcie is adjusted, according to the reader device Reading range and corresponding reading range in the presence or absence of radio-frequency card situation, obtain the position range of the radio-frequency card, and then obtain The Position Approximate of the article indicated by the radio-frequency card.
Different reading ranges can be obtained by mobile reader device.
Step 1, article is indicated using radio-frequency card;
Step 2, reader device is moved along any direction, the reading range of reader device with reader device movement without Disconnected change, record radio-frequency card appears or disappears the position of reader device when in scanning range for the first time, if the position is A, such as To appear in for the first time in scanning range, former direction continues to move to reader device, and record radio-frequency card disappears in scanning model for the first time The position of reader device when enclosing interior, if the position is B, then radio-frequency card near the perpendicular bisector of position A and position B lines,
Such as to disappear in for the first time in scanning range, opposite direction continues to move to reader device, and record radio-frequency card disappears for the second time The position in scanning range is lost, if the position is C,
Then by the article of radio-frequency card sign near the perpendicular bisector of position A and position C lines;
Step 3, reader device is moved along perpendicular bisector, when record radio-frequency card is appeared or disappeared in scanning range for the first time The position of reader device, then such as it is the by the article of radio-frequency card sign in a circle if the Card Reader distance of reader device be X Once appear in scanning range, the circle is using apart from position of the reader device as X to be the center of circle in front of moving direction, using △ for partly Footpath,
Such as to disappear in for the first time in scanning range, the circle is using using position of the moving direction rear apart from reader device as X For the center of circle, using △ as radius,
△ is the uncertainty of reading range position caused by by external interference.
Different reading ranges can also be obtained by adjusting the Card Reader distance of reader device.Continuously adjust reader device Card Reader distance, obtain the reading ranges of consecutive variations, record radio-frequency card is read when appearing or disappearing for the first time in scanning range The Card Reader distance of card device, then it is located at by the article of radio-frequency card sign using the position of reader device as the center of circle, is added with Card Reader distance △ is radius, circle in, and positioned at using the position of reader device as the center of circle, △ is subtracted as radius using Card Reader distance, circle outside,
△ is the uncertainty of reading range position caused by by external interference.
Reference picture 1, Fig. 2, Fig. 3, reader device 2 include radio-frequency card read module 22 and card reader antenna 21, card reader day Line 21 connects radio-frequency card read module 22, in addition to a microprocessor system 3, and microprocessor system 3 connects radio-frequency card and read Modulus block 22.Reader device 2 forms radio-frequency card positioning scanning system 1 with microprocessor system 3.
Reference picture 2, radio-frequency card include at least one positioning radio-frequency card 6, and at least one sign radio-frequency card 5.To position radio frequency Card 6 is used as positioning datum, and article is indicated with indicating radio-frequency card 5.Microprocessor system 3 controls the reading of reader device 2 Card distance change, the excursion of Card Reader distance position the position of radio-frequency card 6 across at least one.Adjust the reading of reader device 2 Card distance, according to whether can read sign radio-frequency card 5, position radio-frequency card 6 combined information obtain sign radio-frequency card 5 relative to Position the position of radio-frequency card 6.
Positioning radio-frequency card 6 position is relatively fixed, and position can be stored in microprocessor system, as known bits Put.It can be unknown to indicate the position of radio-frequency card 5, the relative position of sign radio-frequency card 5 is determined by above technology, and then obtain quilt Indicate the position for the article that radio-frequency card 5 indicates.
Reference picture 2, Fig. 3, reader device 2 because structural relation, adjust Card Reader apart from when, its radiation mode is often not It is centered on position, forms concentric circles state.In the case where Card Reader fills 2 same states, often 21 positive court of card reader antenna To direction Card Reader distance it is farthest, toward both sides extension, then Card Reader distance is gradually shortened.
The curve that maximum reading range of the reader device 2 under same state is formed is named as Card Reader potential field line 7.Card Reader Device 2 adjust Card Reader apart from when, a plurality of Card Reader potential field line 7 can be formed.In the case where external interference is not very strong, a plurality of reading Layered laminate is presented in card potential field line 7.The distance relation between sign radio-frequency card 5 and positioning radio-frequency card 6 described in this patent, sometimes simultaneously It is not the absolute distance between reader device or card reader antenna, but the stacking distant relationships of a plurality of Card Reader potential field line 7.
Specific embodiment 1:
Determination method for indicating the relative position of radio-frequency card 5:
(1) it is miniature when can read positioning radio-frequency card 6 in reader device 2, but sign radio-frequency card 5 can not be read Processor system 3 is recorded as indicating radio-frequency card 5 with the distance between reader device 2 or card reader antenna 21 more than positioning radio-frequency card 6 distance, or be recorded as not in Card Reader signal cover;
(2) it is miniature when can read sign radio-frequency card 5 in reader device 2, but positioning radio-frequency card 6 can not be read Processor system 3 is recorded as indicating radio-frequency card 5 with the distance between reader device 2 or card reader antenna 21 less than positioning radio-frequency card 6 distance;
(3) positioning radio-frequency card 6 can be read in reader device 2, and Card Reader distance is arranged to maximum, but still not When can read sign radio-frequency card 5, microprocessor system 3 is recorded as indicating radio-frequency card 5 and reader device 2 or card reader antenna The distance between 21 are more than Card Reader distance, or are recorded as not in Card Reader signal cover.
Using the positional information for positioning radio-frequency card 6 as reference position, can substantially determine to indicate radio frequency by above-mentioned technology Card 5 determines to be labeled the position of the article of the sign of radio-frequency card 5 relative to the position for positioning radio-frequency card 6.
When relative position determines, because the transmission or reception work of signal, are completed by card reader antenna 21, are determined Relative position object of reference can be used as using the position of card reader antenna 21 greatly.Card reader antenna 21 is built-in with reader device 2 When, object of reference can also be used as using reader device 2.
In order that accurate positioning, positioning radio-frequency card 6 is preferably provided with identical parameter with sign radio-frequency card 5, including places angle Degree, power parameter, sensitivity parameter, antenna parameter etc., in order to the response made to the radiation information of card reader antenna 21 with Apart from directly related, to improve positioning precision.
Specific embodiment 2:
For indicating the relative position of radio-frequency card 5 further exactly determined method:
The quantity of radio-frequency card 6 is positioned by increasing, precision can be increased.It is respectively fixed including at least two positioning radio-frequency cards 6 Position radio-frequency card one, positioning radio-frequency card two, positioning radio-frequency card one, positioning radio-frequency card two are different from the distance between card reader antenna 21; The distance set between position radio-frequency card one and card reader antenna 21 is nearer than positioning radio-frequency card two, and is all read in the maximum of reader device 2 In card distance;Preferably position radio-frequency card one, positioning radio-frequency card two is located at the different position of the radiation intensity of card reader antenna 21;Adjustment The Card Reader distance of reader device 2, according to whether sign radio-frequency card 5, positioning radio-frequency card one, the group for positioning radio-frequency card two can be read Close position of the information acquisition sign radio-frequency card 5 relative to positioning radio-frequency card 6.
(1) microprocessor system 3 controls the Card Reader distance of reader device 2, is less than in Card Reader distance with positioning radio-frequency card Between one apart from when, if sign radio-frequency card 5 can be read, microprocessor system 3 is recorded as indicating radio-frequency card 5 and card reader The distance between antenna 21 is less than the distance of positioning radio-frequency card one.
(2) microprocessor system 3 controls the Card Reader distance of reader device 2 to be less than or equal to the distance between positioning radio-frequency card one When, it is impossible to read sign radio-frequency card 5;Microprocessor system 3 controls the Card Reader distance of reader device 2, big in Card Reader distance The distance between radio-frequency card one is positioned, less than positioning radio-frequency card two between apart from when, if can read sign radio-frequency card 5, Microprocessor system 3 be recorded as indicate the distance between radio-frequency card 5 and card reader antenna 21 be less than position radio-frequency card two away from From, but it is greater than and positions distance between radio-frequency card one.
(3) microprocessor system 3 controls the Card Reader distance of reader device 2, is less than or equal to penetrate with positioning in Card Reader distance Distance between frequency card two, it is impossible to read sign radio-frequency card 5;Microprocessor system 3 controls the Card Reader distance of reader device 2 to most Big Card Reader apart from when, if sign radio-frequency card 5 can be read, microprocessor system 3 is recorded as indicating radio-frequency card 5 and card reader The distance between antenna 21 is more than the distance of positioning radio-frequency card two, but is less than maximum Card Reader distance.
(4) microprocessor system 3 control reader device 2 Card Reader distance, reach maximum Card Reader apart from when, still can not Read sign radio-frequency card 5;Microprocessor system 3 is recorded as indicating the distance between radio-frequency card 5 and card reader antenna 21 greatly In Card Reader distance, or it is recorded as not in Card Reader signal cover.
By above-mentioned technical proposal the like, it is seen that the quantity of radio-frequency card 6 is positioned by increasing, positioning accurate can be strengthened Degree.
Microprocessor system 3 controls the mode of the Card Reader distance of reader device 2, can change the spoke of card reader antenna 21 The mode of intensity or radiant power is penetrated, Card Reader distance is adjusted by way of the intensity for changing transmission of electromagnetic signals;It can also be Change the mode of reader-signal receiving sensitivity, Card Reader distance is adjusted by way of changing signal receiving sensitivity.
A Card Reader distance change trend is set, can Card Reader distance is gradually become by closely becoming remote Card Reader distance change Gesture, or make Card Reader distance by far gradually becoming near Card Reader distance change trend.Become by a Card Reader distance change determined Gesture, simplify scanning process.In order that radio-frequency card can be responded accurately in scanning process, it should suitably slow down sweep speed, to penetrating Frequency card reserves the response time.
Microprocessor system 3 controls positioning radio-frequency card 6 of the reader device 2 to surrounding to be scanned, and is recorded in scanning and arrives Newly-increased positioning radio-frequency card 6 is new when losing the positioning radio-frequency card 6 of information, records the radiation intensity or Card Reader of card reader antenna 21 Device signal receiving sensitivity, and by the radiation intensity of the card reader antenna 21 or reader-signal receiving sensitivity with positioning radio frequency The association of card 6.Spirit is received so as to record the radiation intensity of card reader antenna 21 or reader-signal corresponding to each positioning radio-frequency card 6 Sensitivity, so as to form Card Reader apart from relevant parameter.Above-mentioned work is preferably at least scanned in first time to the radio-frequency card of surrounding Shi Zhihang, it is often longer to perform the time that above-mentioned work is spent.System generally requires to be calibrated after work a period of time, Above-mentioned work can be performed in calibration.
In scanning process, microprocessor system 3 calls Card Reader, and apart from relevant parameter, control reader device 2 is according to reading Card is positioning the saltus step scanning between the Card Reader distance associated of radio-frequency card 6 with each, swept so as to greatly improve apart from relevant parameter Retouch speed.Above-mentioned saltus step scanning performs in normal work, to improve the efficiency usually to work.
When microprocessor system 3 calls Card Reader apart from relevant parameter, the radiation to described card reader antenna 21 is strong Degree or reader-signal receiving sensitivity, increase and scanning surplus, in order to which response environment changes caused disturb.Can be to one The radiation intensity or reader-signal receiving sensitivity parameter of card reader antenna 21 strengthen a surplus, weaken a surplus, Huo Zhetong The surpluses of Shi Zengjia mono- simultaneously weaken a surplus one small scanning range of composition.
Reader device 2 in a shell, forms radio-frequency card positioning scanning system 1, shell with microprocessor system 3 Provided with a Handheld Division, a hand-held radio-frequency card positioning scanning system 1 is formed.Battery can be set in shell, provided for system Power supply.Hand-held radio-frequency card positioning scanning system 1 can use a hand-held press proof formula.
Specific embodiment 3:
Reader device 2 is provided with least two card reader antennas 21, in order to determine the coordinate value more than one-dimensional.Reader device 2 adjusted by way of the intensity for changing transmission of electromagnetic signals Card Reader apart from when, used at least two card reader antenna 21, time-sharing work, in order to avoid cause mutual signal interference.
Specifically, reader device 2 can be provided with two card reader antennas 21, the reading range of two card reader antennas 21 is deposited Overlapping.It can determine to indicate the two-dimensional coordinate of radio-frequency card 5 by polar mode.Two card reader days of reader device 2 Line 21, respectively positioned at two corners of scanning space.Two card reader antennas 21 of reader device 2 are arranged in parallel to the ground In plane, for determining the two-dimensional spatial location of the sign radio-frequency card 5 in space., can be with for the scanning space that space is larger Card reader antenna 21 is set in four corners respectively, to expand scanning range.
Reader device 2 can be provided with least three card reader antennas 21, the scanning directions of three card reader antennas 21 not position In same plane, and reading range is in the presence of overlapping.The three-dimensional space of sign radio-frequency card 5 is determined by least three card reader antennas 21 Between position.
The microprocessor system 3 of radio-frequency card positioning scanning system 1 is also associated with a display, microprocessor system 3 In have a spatial model corresponding with needing the spatial entities that scan, positioning radio-frequency card 6, positioning are distributed with spatial entities The spatial distribution position of radio-frequency card 6 is indicated in spatial model.
Can artificially indicate by the work in the spatial distribution location mark to spatial model of new positioning radio-frequency card 6, It can also be by spacescan, the relative of new positioning radio-frequency card 6 is confirmed according to the position relationship of existing positioning radio-frequency card 6 Position, rower of going forward side by side show.Microprocessor system 3 is connected with a keyboard or a touch-screen, in order to artificially input information.It is logical Cross and associate positioning radio-frequency card 6 with spatial model, radio-frequency card is positioned to the visualization of the scanning work image of scanning system 1.Just Used in user.
Radio-frequency card positioning scanning system 1 scanning to sign radio-frequency card 5 when, according to sign radio-frequency card 5 with position radio-frequency card 6 it Between position relationship, it is determined that sign radio-frequency card 5 in the relative position in space, and relative position is corresponded in spatial model, entered Row display or storage.In order to which user uses.
Radio-frequency card positioning scanning system 1 also includes a camera, and spatial entities image is absorbed by camera, and space is real Body image is used to establish spatial model.Picture that can be using entity space image as spatial model, or pass through miniature processing Device system 3 is incorporated in spatial model after further handling.
The antenna of sign radio-frequency card 5 and positioning radio-frequency card 6 can use Trinity antenna, in order to receive each side To signal, while also allow for all directions send signal.
The antenna distance of at least two positioning radio-frequency cards 6 is fixed, and forms a positioning radio-frequency card group, and reader device 2 is being adjusted Whole Card Reader apart from when, it may appear that two states for changing respectively of the positioning signal of radio-frequency card 6, microprocessor system 3 record When two positioning radio-frequency cards 6 change respectively, the radiation intensity of reader device 2.Microprocessor system 3 is strong to two radiation Degree is contrasted, and calls the antenna distance of two positioning radio-frequency cards 6, and the antenna spacing of two positioning radio-frequency cards 6 is spoke Penetrate the changing value of Card Reader distance during Strength Changes.
Microprocessor system 3 obtains the corresponding relation of change in radiation intensity and Card Reader distance, because electromagenetic wave radiation becomes Change has linear characteristic, therefore show that two position radio-frequency card 6 corresponding to the radiation intensity value during change in radiation intensity Distance value between antenna, so as to the more accurate position for determining sign radio-frequency card 5.
If the distance between the antenna of two positioning radio-frequency cards 6 is L, change in radiation intensity value is N.If in change in radiation intensity Be worth for D when, there is the sign signal of radio-frequency card 5 to change, then indicate distance between radio-frequency card 5 and one of positioning radio-frequency card about For X=D*L/N.It is not the linear relation of standard because the linear relationship presented, therefore sign radio-frequency card is calculated accurate Particular location when, it is necessary to calculating be modified.It may need to call aerial radiation strength distributing information, surrounding dry during amendment Disturb the information such as source information.Positioning radio-frequency card 6 that antenna distance is fixed and known can be three or more than three, so as to In being accurately positioned.
Due to passing through reading by being distributed multiple positioning radio-frequency cards 6 of known location using above-mentioned technical proposal, the present invention The mode of the Card Reader distance change of card device 2 is scanned to radio-frequency card, determines the relative position of the sign radio-frequency card 5 of unknown position Put, and then obtain the position for the article for being labeled the sign of radio-frequency card 5.Compared with traditional technology, have it is simple in construction, cost is low It is honest and clean, detection it is quick the advantages that.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (2)

1. obtain the reader device of different reading ranges, including radio-frequency card read module and Card Reader by adjusting Card Reader distance Device antenna, it is characterised in that the card reader antenna is a radiation intensity or the adjustable card reader antenna of radiant power, described to penetrate Frequency card read module is the adjustable radio-frequency card read module of a signal receiving sensitivity, continuously adjust the Card Reader of reader device away from From obtaining the reading ranges of consecutive variations, record radio-frequency card appears or disappears reader device when in scanning range for the first time Card Reader distance, then it is located at by the article of radio-frequency card sign using the position of reader device as the center of circle, using Card Reader distance plus △ as radius, Circle in, and positioned at using the position of reader device as the center of circle, △ is subtracted as radius using Card Reader distance, circle outside,
△ is the uncertainty of reading range position caused by by external interference.
2. radio-frequency card, it is characterised in that including at least one positioning radio-frequency card, and at least one sign radio-frequency card;With the positioning Radio-frequency card is indicated as positioning datum with indicating radio-frequency card to article;
The positioning radio frequency card position is relatively fixed, and can be known to position.
CN201710992900.2A 2012-08-30 2012-10-08 The reader device of different reading ranges and supporting radio-frequency card are obtained by adjusting Card Reader distance Withdrawn CN107886021A (en)

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CN201210379835.3A Pending CN103679085A (en) 2012-08-30 2012-10-08 RF card marking and positioning system
CN201710992900.2A Withdrawn CN107886021A (en) 2012-08-30 2012-10-08 The reader device of different reading ranges and supporting radio-frequency card are obtained by adjusting Card Reader distance
CN201710992512.4A Withdrawn CN107798271A (en) 2012-08-30 2012-10-08 Radio-frequency card indicates alignment system
CN201210380022.6A Active CN103679086B (en) 2012-08-30 2012-10-08 Radio-frequency card transboundary localization method
CN201220515300XU Expired - Fee Related CN202916839U (en) 2012-08-30 2012-10-08 RF (Radio Frequency) card system provided with multiple card-reader antennae
CN201710993895.7A Withdrawn CN107895129A (en) 2012-08-30 2012-10-08 The method of different reading ranges is obtained by adjusting Card Reader distance
CN201210380048.0A Active CN103679087B (en) 2012-08-30 2012-10-08 Localization method based on radio-frequency technique
CN201710993892.3A Active CN107908990B (en) 2012-08-30 2012-10-08 Radio frequency card positioning scanning system
CN2012205153264U Expired - Fee Related CN202916840U (en) 2012-08-30 2012-10-08 Hand-held RF (Radio Frequency) card positioning system
CN201710992878.1A Withdrawn CN107784248A (en) 2012-08-30 2012-10-08 Saltus step formula Card Reader localization method
CN201710993536.1A Withdrawn CN107908989A (en) 2012-08-30 2012-10-08 Radio frequency positioning method based on multiple radio-frequency cards

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CN201220515300XU Expired - Fee Related CN202916839U (en) 2012-08-30 2012-10-08 RF (Radio Frequency) card system provided with multiple card-reader antennae
CN201710993895.7A Withdrawn CN107895129A (en) 2012-08-30 2012-10-08 The method of different reading ranges is obtained by adjusting Card Reader distance
CN201210380048.0A Active CN103679087B (en) 2012-08-30 2012-10-08 Localization method based on radio-frequency technique
CN201710993892.3A Active CN107908990B (en) 2012-08-30 2012-10-08 Radio frequency card positioning scanning system
CN2012205153264U Expired - Fee Related CN202916840U (en) 2012-08-30 2012-10-08 Hand-held RF (Radio Frequency) card positioning system
CN201710992878.1A Withdrawn CN107784248A (en) 2012-08-30 2012-10-08 Saltus step formula Card Reader localization method
CN201710993536.1A Withdrawn CN107908989A (en) 2012-08-30 2012-10-08 Radio frequency positioning method based on multiple radio-frequency cards

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