CN102721430B - Displacement sensing positioning system on basis of radio frequency identification technology and positioning method - Google Patents
Displacement sensing positioning system on basis of radio frequency identification technology and positioning method Download PDFInfo
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- CN102721430B CN102721430B CN201210182379.3A CN201210182379A CN102721430B CN 102721430 B CN102721430 B CN 102721430B CN 201210182379 A CN201210182379 A CN 201210182379A CN 102721430 B CN102721430 B CN 102721430B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/48—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using wave or particle radiation means
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- Radar, Positioning & Navigation (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a positioning method of a displacement sensing positioning system on the basis of a radio frequency identification technology. The system comprises a fixed station communicated with an upper computer; a first microprocessor MCU (Microprogrammed Control Unit) is arranged in the fixed station; the fixed station is connected with a group of coaxial radio frequency cables; each reference step-length coaxial radio frequency cable is provided with a positioning area; a shielding layer of each cable in each positioning area has two states, namely opening a leakage window or keeping shielding; a radio frequency communication device is arranged in a mobile station; and the mobile station is in radio frequency communication with the fixed station sequentially by the radio frequency communication device and the leakage windows of the shielding layers of the coaxial radio frequency cables. According to the invention, leakage states of one group of coaxial radio frequency cables in each positioning area are combined and coded into position codes of the position of the positioning area; a positioning function of a card reader can be totally replaced; the installation of the card reader is totally avoided; the system is simplified; the installation workload and the post maintenance workload are reduced; and the stability of the system is improved.
Description
Technical field
The present invention relates to displacement sensing positioning field, especially a kind of localization method of the displacement sensing positioning system based on REID.
Background technology
At present, traditional position sensing system overwhelming majority adopts on locating lines, and each anchor point installs radio-frequency card reader, and each card reader has different identity codes; Movement station installs radio frequency marking card, and each tag card also has different identity codes.When movement station moves to after near positioning area card reader, between tag card and card reader, realize communication, according to the mutual identification of card reader and tag card, determine identity and the positional information of movement station, realize the orientation sensing of movement station.This traditional displacement sensing positioning system, because need to install locating card reader along the line at locating area, each card reader is made up of the integrated circuit of complexity and radio frequency chip, and connected by cable, a large amount of installation card reader, installation workload is large, and the maintenance workload in later stage is large, and system failure rate is high.
Summary of the invention
Primary and foremost purpose of the present invention is to provide a kind of without the need to installing card reader, structure is simple, system stability the is strong displacement sensing positioning system based on REID on cable.
For achieving the above object, present invention employs following technical scheme: a kind of displacement sensing positioning system based on REID, comprise the fixed station with upper machine communication, first microprocessor MCU is set in fixed station, the coaxial radio frequency cable that fixed station sews window with one group of screen layer band is connected, radio-frequency communication device is set in movement station, movement station successively by radio-frequency communication device, coaxial radio frequency cable screen layer sew window and fixed station radio-frequency communication.
Described host computer is communicated with the first microprocessor MCU of fixed station by CAN or RS-485 bus or optical fiber or radio-frequency cable or twisted-pair feeder.
Described fixed station is connected with one group of coaxial radio frequency cable by its cable interface, one group of coaxial radio frequency cable is made up of some coaxial radio frequency cables, the each benchmark step-length of this group cable has positioning area, the screen layer of the every root cable in positioning area place has unlatching sew window or keeps shielding two states; In same group of cable, every root coaxial radio frequency cable has this cable cognizance code, mutually separates.
Described movement station is made up of the second Micro-processor MCV and radio-frequency communication device, and the input/output terminal of the second Micro-processor MCV is connected with radio-frequency communication device.
Described radio-frequency communication device is radio-frequency identification card.
Described benchmark step-length is more than or equal to 0.1M.
Another object of the present invention is to the localization method providing a kind of displacement sensing positioning system based on REID, the method comprises the step of following order:
(1) set described fixed station, the radical of its one group of coaxial radio frequency cable L connected is n, and the benchmark step-length of setting cable group L is U, and described benchmark step-length has positioning area; Positioning area is the scope that each standard sews window signal communication covering, and each positioning area scope is less than or equal to benchmark step-length; At positioning area place, every root cable screen layer is opened and is sewed window or keep shielding, and this two states is designated as the positioning area code 1 or 0 of this benchmark step-length;
(2) establish cable group L, the step-length of first cable L1 is benchmark step-length U, and second cable L2 step-length is 2 times of first step-length i.e. 2U, comprise two benchmark step-length positioning area codes, 3rd cable L3 step-length is 2 times of second step-length i.e. 4U, and comprise four benchmark step-length positioning area codes, the rest may be inferred; Within the same cable step-length cycle, each benchmark step-length positioning area status code comprised is identical; In two often adjacent cable step-length cycles, positioning area status code 1,0 contrary; N root cable is combined, and in each position along this group cable L, every root cable has the benchmark step-length positioning area status code of position, and the positioning area status code of all cables is combined into the position encoded of this position;
(3) movement station moves to a positioning area position of group cable L, by being identified in the leakage current communication state of this position and each coaxial radio frequency cable, if this cable has at positioning area place sew window, then be labeled as status code 1, otherwise, then be labeled as status code 0, identify that the status code combination of all coaxial radio frequency cables is the position encoded of movement station place positioning area.
As shown from the above technical solution, the present invention utilizes the difference of one group of coaxial radio frequency cable to sew state at each positioning area place, coding becomes the position code of this positioning area, after the radio-frequency communication device of movement station moves to this positioning area, by with the radio-frequency communication of sewing window, identify the position encoded of this positioning area, and upload fixed station and host computer, complete position sensing location.Visible, sew the position code of state encoding with positioning area coaxial radio frequency cable, the function of the location of card reader can be substituted completely, eliminate the installation of card reader completely, simplify system, decrease installation workload and later maintenance workload, improve the stability of system.
Accompanying drawing explanation
Fig. 1 is system construction drawing of the present invention.
Fig. 2 is position encoded schematic diagram.
Embodiment
A kind of displacement sensing positioning system based on REID, comprise the fixed station 2 with host computer 3 communication, first microprocessor MCU is set in fixed station 2, the coaxial radio frequency cable that fixed station 2 sews window with one group of screen layer band is connected, radio-frequency communication device is set in movement station 1, movement station 1 successively by radio-frequency communication device, coaxial radio frequency cable screen layer sew window and fixed station 2 radio-frequency communication.Described host computer 3 is communicated with the first microprocessor MCU of fixed station 2 by CAN or RS-485 bus or optical fiber or concentric cable or twisted-pair feeder, as shown in Figure 1.
As shown in Figure 1, described fixed station 2 is connected with one group of coaxial radio frequency cable by its communication interface, one group of coaxial radio frequency cable every root cable screen layer is opened and sews window or keep shielding two states; To sew window be coaxial radio frequency cable screen layer by the slotted eye offered or gap, and cable realizes inside and outside radio-frequency communication by sewing window, and sew the outer coaxial radio frequency cable signal conductively-closed layer shielding of window, every root coaxial radio frequency cable has its cognizance code.
Sew window shape not limit, length and leakage radiation scope are less than or equal to benchmark step-length.Radiofrequency signal is by sewing window and to realize in coaxial radio frequency cable and the signal and communication of the external space.Sew external shield in coaxial radio frequency cable signal conductively-closed layer beyond window.
The signal and communication scope sewing window place is positioning area.At positioning area place, whether every root coaxial radio frequency cable screen layer passes through to open sews window, and every root cable has sews or no-leak two states.As shown in Figure 1, described movement station 1 is made up of the second Micro-processor MCV and radio-frequency communication device, the input/output terminal of the second Micro-processor MCV is connected with radio-frequency communication device, described radio-frequency communication device is radio-frequency identification card, radio-frequency identification card is responsible for transceiving radio frequency signal, radio-frequency identification card sews window and fixed station 2 communication via coaxial radio frequency cable, and the information of the second Micro-processor MCV to transmitting-receiving carries out treatment and analysis.Described fixed station 2 is made up of first microprocessor MCU, two-way signaling relay amplifier and communication interface module, first microprocessor MCU is responsible for processing the information transmitted by communication interface module, and the transmitting-receiving of control information, communication interface module is responsible for L1 ~ Ln coaxial radio frequency cable transmitting-receiving unlike signal, and send to the second Micro-processor MCV to process, when fixed station 2 is contacted, bi-directional relaying signal amplifier can play the relaying amplification of signal.
Below in conjunction with Fig. 1 and Fig. 2, the present invention is described further.
As shown in Figure 2, if the benchmark step-length of a group of coaxial radio frequency cable L1, L2, L3 is U, benchmark step-length is more than or equal to 0.1M.In the benchmark step-length of every root cable, have positioning area, positioning area length is less than or equal to benchmark step-length.At each positioning area place, every root cable screen layer has unlatching to sew window or keeps shielding two states, and as shown in Figure 2, hollow positioning area represents that there is leakage window at this place, is labeled as status code 1; Solid positioning area positioning area represents that this place is without leakage window, is designated as this status code 0.If cable group L first cable step-length is benchmark step-length U, second cable step-length is 2 times of first step-length i.e. 2U, comprises two benchmark step-lengths, and the 3rd cable step-length is 2 times of second step-length i.e. 4U, comprise four benchmark step-lengths ..., every root cable step-length is followed successively by the multiple of a cable.Within the same cable step-length cycle, each benchmark step-length positioning area status code comprised is identical; In two often adjacent cable step-length cycles, positioning area status code 1,0 contrary.Step-length as cable 2 is 2U, comprises two benchmark step-length positioning area codes, and in first step-length, comprising two positioning area codes is 1,1, and in second step-length, two positioning area codes are 0,0.Eight benchmark step-lengths along this group cable have position U1-U8, each position respectively, and every root cable positioning area status code is combined into the position encoded of this position.The position encoded of position encoded 111, the U5 of being position as U1 position is 110.
As shown in Figure 1, fixed station 2 connects one group of radio-frequency cable, and by every root radio-frequency cable receiving and transmitting signal, every root cable has its identification code.The radical setting its one group of coaxial radio frequency cable L connected of a fixed station is n, if the benchmark step-length cycle is U, at the positioning area place of each benchmark step-length, the screen layer of coaxial radio frequency cable is opened and is sewed window or keep shielding, and this two states is designated as the positioning area code 1 or 0 of this benchmark step-length.Movement station moves to a positioning area position of group cable L, by being identified in the leakage current communication state of this position and each coaxial radio frequency cable, if this cable has at positioning area place sew window, then be labeled as status code 1, otherwise, then be labeled as status code 0, identify that the status code combination of all coaxial radio frequency cables is the position encoded of movement station place positioning area.
Movement station 1 radio-frequency identification card moving to positioning area carries out communication by sewing window and coaxial radio frequency cable and fixed station.If the screen layer of positioning area place coaxial radio frequency cable is not opened sew window, this place is still masked state, the radio-frequency identification card moving to the movement station 1 of this position just cannot carry out communication with coaxial radio frequency cable and fixed station 2, whether coaxial radio frequency cable has leakage signal to be denoted as status code 1 or 0 at positioning area, positioning area has one group of coaxial radio frequency cable, every root cable has the status code of 1 or 0, and assembly coding just becomes the position encoded of this positioning area.
Set a fixed station 2, the cable number of one group of coaxial radio frequency cable group L of connection is n, and at each positioning area place, the difference of n root cable is sewed state group and synthesized the position encoded of this positioning area, and a fixed station band one group of n root cable can have 2 altogether
nindividual unduplicated position encoded.Movement station 1 moves to the position of positioning area, by coaxial radio frequency cable sew window and fixed station carries out communication, identify the position encoded of movement station; Movement station 1 is sent to fixed station 2 by active mode or passive mode by position encoded, and fixed station 2 is sent to host computer 3 by position encoded again.
Described active mode refers to, movement station moves to positioning area place, the radio-frequency unit of movement station detects the signal that coaxial radio frequency cable is sewed, what movement station detecting judged each coaxial radio frequency cable sews state, identify the position encoded of this positioning area, information, by the position encoded identification code packing with self, is sent to communication cable and fixed station by RF-wise by movement station, information is sent to host computer by fixed station again, realizes the displacement sensing of system.In FIG, movement station 1 moves to positioning area U1 place, and the radio-frequency unit of movement station 1 detects the signal that communication cable is sewed, what movement station 1 had identified all coaxial radio frequency cables sews state, identifies telecommunication cable L1 and sews, be denoted as status code 1, L2 is no-leak, is designated 0, L3 and sews, be denoted as status code 1,, Ln is no-leak, is masked as 0, movement station 1, by U1 position and every root communication cable leakage current communication state, identifies position encoded 101 of positioning area U1 position ... 0; In like manner, when movement station 1 moves to positioning area U2 place, identifying the position encoded of U2 is 001 ... 0; When movement station 1 moves to positioning area Ui place, identifying the position encoded of positioning area Ui is 111 ... 0.Movement station 1 identifies the position encoded of this positioning area, and movement station 1 is by the position encoded identification code with self, and be sent to coaxial radio frequency cable by RF-wise and be sent to fixed station 2, information is sent to host computer 3 by fixed station 2 again, realizes the displacement sensing of system.
Described passive mode refers to, movement station 1 sends radiofrequency signal in moving process, when movement station 1 moves to positioning area place, fixed station 2 judges whether every root coaxial radio frequency cable can set up radio-frequency communication with movement station 1, if the determination result is YES, then the status code of sewing of the coaxial radio frequency cable at positioning area place, movement station 1 place is 1; Otherwise the coaxial radio frequency cable at this positioning area place is no-leak, be then labeled as status code 0, fixed station 2 identify all coaxial radio frequency cables in movement station 1 position sew state after, assembly coding is the position encoded of this position, and is sent to host computer 3, realizes the position sensing of system.In FIG, movement station 1 sends radiofrequency signal in moving process, when movement station 1 moves to positioning area place, fixed station 2 sews by communication cable group L the radiofrequency signal that window detects movement station 1, fixed station 2 effectively identifies and judges whether all coaxial radio frequency cables detect the radiofrequency signal of movement station 1, if can detect the radiofrequency signal of movement station 1, then this cable is labeled as status code 1, otherwise, then status code 0 is labeled as.In positioning area U1 position, fixed station 2 detects the radiofrequency signal of movement station 1 by telecommunication cable L1, by the radiofrequency signal of L2 detecting less than movement station 1, the radiofrequency signal of movement station 1 is detected by telecommunication cable L3, detect the radiofrequency signal less than movement station 1 by telecommunication cable Ln, it is 101 that system and fixed station 2 identify the position encoded of movement station 1 position accordingly ... 0.In like manner, movement station 1 moves to positioning area U2 and positioning area Ui place, and it is 001 that system identification goes out the position encoded of positioning area U2 ... the position encoded of 0, positioning area Ui place is 111 ... 0.Fixed station 2 identify movement station 1 position position encoded after this is position encodedly sent to host computer 3, realize the position sensing of system.
In a word, one group of coaxial radio frequency cable screen layer of the present invention's positioning area sews the position code sewing combinations of states coding of window, the function of the location of card reader can be substituted completely, eliminate the installation of card reader completely, simplify system, decrease installation workload and later maintenance workload, improve the stability of system.The present invention is also applicable to other radio-frequency cables being with screen layer.
Claims (3)
1. the localization method based on the displacement sensing positioning system of REID, this system comprises the fixed station with upper machine communication, first microprocessor MCU is set in fixed station, the coaxial radio frequency cable that fixed station sews window with one group of screen layer band is connected, radio-frequency communication device is set in movement station, movement station successively by radio-frequency communication device, coaxial radio frequency cable screen layer sew window and fixed station radio-frequency communication; It is characterized in that the method comprises the step of following order:
(1) set described fixed station, the radical of its one group of coaxial radio frequency cable L connected is n, if the benchmark step-length of cable group L is U, each benchmark step-length has positioning area; Open at every root cable screen layer at positioning area place and sew window or keep shielding, this two states is designated as the positioning area code 1 or 0 of this benchmark step-length;
(2) establish every root cable in cable group L to have respective cable step-length, the step-length of first cable is benchmark step-length U, and second cable step-length is 2 times of first step-length i.e. 2U, comprise two benchmark step-lengths, 3rd cable step-length is 2 times of second step-length i.e. 4U, and comprise four benchmark step-lengths, the rest may be inferred; On same cable, within the same cable step-length cycle, each benchmark step-length positioning area status code comprised is identical; Two often adjacent cable step-length cycles, positioning area status code 1,0 is changed; N root cable is combined, and in each position along this group cable L, every root cable has the benchmark step-length positioning area status code of position, and the positioning area status code of all cables is combined into the position encoded of this position;
(3) movement station moves to a positioning area position of group cable L, by being identified in the leakage current communication state of this position and each coaxial radio frequency cable, if this cable has at positioning area place sew window, then be labeled as status code 1, otherwise, then be labeled as status code 0, identify that the status code combination of all coaxial radio frequency cables is the position encoded of movement station place positioning area;
(4) movement station is sent to fixed station by active mode or passive mode by position encoded, and fixed station is sent to host computer by position encoded again.
2. the localization method of the displacement sensing positioning system based on REID according to claim 1, it is characterized in that: described active mode refers to, movement station moves to positioning area place, what the radio-frequency unit of movement station detected each coaxial radio frequency cable sews state, identify the position encoded of this positioning area, movement station is by the position encoded identification code packing with self, by RF-wise, information is sent to coaxial radio frequency cable and fixed station, information is sent to host computer by fixed station again, realizes the displacement sensing of system.
3. the localization method of the displacement sensing positioning system based on REID according to claim 1, it is characterized in that: described passive mode refers to, movement station sends radiofrequency signal in moving process, when movement station moves to positioning area place, by detecting, fixed station judges whether all radio-frequency cables have radiofrequency signal communication with movement station, determine whether every root cable has at positioning area place and sew window, if the determination result is YES, then status code sewed by this cable of movement station place positioning area place is 1; Otherwise, be then labeled as status code 0, fixed station identify all coaxial radio frequency cables of movement station place positioning area sew state after, assembly coding is the position encoded of this position, and is sent to host computer, realizes the position sensing of system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210182379.3A CN102721430B (en) | 2012-06-05 | 2012-06-05 | Displacement sensing positioning system on basis of radio frequency identification technology and positioning method |
| PCT/CN2013/076650 WO2013182021A1 (en) | 2012-06-05 | 2013-06-03 | Displacement sensing locating system based on radio-frequency identification technology and locating method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210182379.3A CN102721430B (en) | 2012-06-05 | 2012-06-05 | Displacement sensing positioning system on basis of radio frequency identification technology and positioning method |
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| CN102721430A CN102721430A (en) | 2012-10-10 |
| CN102721430B true CN102721430B (en) | 2015-02-04 |
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Families Citing this family (6)
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| CN102721430B (en) * | 2012-06-05 | 2015-02-04 | 童建伟 | Displacement sensing positioning system on basis of radio frequency identification technology and positioning method |
| CN102820541A (en) * | 2012-06-11 | 2012-12-12 | 童建伟 | Encoding leakage cable based on leakage cable technology |
| CN103217683B (en) * | 2013-05-11 | 2015-02-04 | 童建伟 | Multi-frequency-leakage-communication-technology-based displacement positioning system and positioning method for moving objects in roadways |
| CN110019131B (en) * | 2017-12-08 | 2021-10-15 | 北京京东尚科信息技术有限公司 | Method and device for multi-disk service |
| DK3661162T3 (en) * | 2018-11-29 | 2022-01-03 | Telia Co Ab | Terminal position determination based on coaxial cables with leakage |
| CN116660826B (en) * | 2023-05-17 | 2023-12-19 | 中天射频电缆有限公司 | Leakage device, positioning method and electronic equipment |
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| WO2013182021A1 (en) | 2013-12-12 |
| CN102721430A (en) | 2012-10-10 |
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