CN102680730A - Rail vehicle speed measurement system and method based on radio frequency identification (RFID) - Google Patents
Rail vehicle speed measurement system and method based on radio frequency identification (RFID) Download PDFInfo
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Abstract
The invention discloses a rail vehicle speed measurement system and a rail vehicle speed measurement method based on radio frequency identification (RFID). The system at least comprises an RFID label sequence which is uniformly arranged on a speed measurement rail at intervals and consists of a plurality of RFID labels stored with label ID information, and an RFID speed measurement device which is arranged on a rail vehicle to be subjected to speed measurement and used for calculating real-time running speed of the rail vehicle to be subjected to the speed measurement according to the ID information supplied by the corresponding RFID labels. According to the rail vehicle speed measurement system and the rail vehicle speed measurement method based on the RFID, the shortcomings of low measurement precision, low interference resistance, low positioning precision and the like in the prior art can be overcome; and the advantages of high measurement precision, high interference resistance and easiness for precise positioning are achieved.
Description
Technical field
The present invention relates to rail vehicle velocity measuring technique field, particularly, relate to a kind of based on less radio-frequency identification the rail vehicle velocity-measuring system and the method for (Radio frequency identification is called for short RFID, claims the radiobeam affirmation again).
Background technology
In the rail vehicle technical field of measurement and test, the speed of accurately measuring track vehicular traffic with the absolute position of vehicle is positioned, have great importance for track traffic.Existing rail vehicle speed-measuring method mainly adopts wheel tachogenerator and velocity radar.
Wherein, device wheel tachogenerator is a sensor that is installed on the train wheel shaft, and when wheel, the sensor internal part is rotated in company with wheel together; And form relative motion between the fixed part, thereby measure the speed of train.The method of wheel detector is simple.But, when vehicle acceleration was excessive, the phenomenon that dallies and skid can appear; After idle running occurring and skidding, greatly influence is tested the speed and distance measuring precision.
Velocity radar is a kind of device of measuring train speed through Doppler effect.Velocity radar is installed on the train body, and radar sends the signal of certain frequency with the fixing cycle, and this signal returns the receiving unit of radar through track reflection.Because Doppler effect, there are deviation in the frequency of radar emission and the frequency of reception, therefore can calculate the speed of train.The method major defect of velocity radar is to be subject to disturb, and it tests the speed and depends on the echoed signal of radar, receives the interference of other moving objects easily.
It is thus clear that all for example there is problem such as dally, skid in the above-mentioned existing various rail vehicle distance measuring equipment that tests the speed; In addition, the accurate location of rail vehicle also is the main difficult problem with positioning system of testing the speed at present.
In realizing process of the present invention, defectives such as the inventor finds to exist at least in the prior art that measuring accuracy is low, anti-interference difference and accurate location difficulty.
Summary of the invention
The objective of the invention is to,, propose a kind of rail vehicle velocity-measuring system, to realize that measuring accuracy is high, the easy advantage of strong interference immunity and accurate location based on RFID to the problems referred to above.
Another object of the present invention is to, propose a kind of rail vehicle speed-measuring method based on RFID.
For realizing above-mentioned purpose; The technical scheme that the present invention adopts is: a kind of rail vehicle velocity-measuring system based on RFID; At least comprise the RFID sequence label that even separation is formed on testing the speed with track and by a plurality of RFID labels that store label ID information at least, and be installed on the rail vehicle to be measured and be used for calculating the RFID speed measuring device of the real-time gait of march of rail vehicle to be measured based on the identification information that corresponding RF ID label provides.
Further; Said RFID speed measuring device; At least comprise and be used to the antenna of radio-frequency channel that the RFID sequence label provides energy and is provided for realizing reception and/or the transmission of radiofrequency signal; Be complementary with said a plurality of RFID labels and be used for the rail vehicle traveling process in real time order read the identification information of corresponding RF ID label in the said antenna footprint and the RFID label reader that sends, and store in advance and comprise each RFID label at least and testing the speed with the tables of data of the positional information in the track and be used for identification information and corresponding RF ID label based on said RFID label reader transmission obtain the gait of march of rail vehicle to be measured in the positional information calculation of respective rail signal Processing computing machine.
Further, a plurality of RFID labels in the said RFID sequence label comprise at least and can store the ID label, and can offer a plurality of passive RFID tags or a plurality of active RFID tag in user's 64 bit-identify storage spaces and 512 user profile spaces.
Further, said identification information comprises the time for reading of label ID and this label ID of corresponding RF ID at least.
Further, said RFID label reader comprises vehicle-mounted RFID label reader at least, and/or,
Said antenna comprises radio-frequency antenna at least, and/or,
Said signal Processing computing machine comprises the cab signal process computer at least.
Simultaneously, another technical scheme of the present invention's employing is: a kind of rail vehicle speed-measuring method based on RFID comprises:
A, on testing the speed with track, even separation RFID sequence label, this RFID sequence label is made up of a plurality of RFID labels that store label ID information at least; And, on rail vehicle to be measured, the RFID speed measuring device is installed;
B, RFID speed measuring device calculate based on the identification information that corresponding RF ID label provides, and obtain the RFID speed measuring device of the real-time gait of march of rail vehicle to be measured.
Further, step b specifically comprises:
Adopt antenna,, and be provided for realizing the radio-frequency channel of the reception and/or the transmission of radiofrequency signal for the RFID sequence label provides energy;
Adopt the RFID label reader that is complementary with a plurality of RFID labels, in the rail vehicle traveling process, order reads the identification information of corresponding RF ID label in the said antenna footprint in real time, and sends; And,
Adopt the signal Processing computing machine, in this signal Processing computing machine, store in advance and comprise each RFID label at least and testing the speed with the tables of data of the positional information in the track; The identification information that sends based on said RFID label reader and in the tables of data of storage in advance, search the positional information of gained corresponding RF ID label in respective rail; Calculate, obtain the signal Processing computing machine of the gait of march of rail vehicle to be measured.
Further; In step b; A plurality of RFID labels in the said RFID sequence label comprise at least and can store the ID label, and can offer a plurality of passive RFID tags or a plurality of active RFID tag in user's 64 bit-identify storage spaces and 512 user profile spaces.
Further, in step b, said identification information comprises the time for reading of label ID and this label ID of corresponding RF ID at least.
Further, in step b, said RFID label reader comprises vehicle-mounted RFID label reader at least, and/or,
Said antenna comprises radio-frequency antenna at least, and/or,
Said signal Processing computing machine comprises the cab signal process computer at least.
The rail vehicle velocity-measuring system and the method based on RFID of various embodiments of the present invention; Because this system comprises the RFID sequence label that even separation is formed at least on testing the speed with track and by a plurality of RFID labels that store label ID information at least, and be installed on the rail vehicle to be measured and be used for calculating the RFID speed measuring device of the real-time gait of march of rail vehicle to be measured based on the identification information that corresponding RF ID label provides; Can be applied to testing the speed of rail vehicle, mainly solve the problem that tests the speed of rail vehicle; Simultaneously, can also accurate absolute location information be provided for vehicle; Thereby can overcome that measuring accuracy in the prior art is low, the anti-interference difference and the accurate defective of location difficulty, with realize that measuring accuracy is high, strong interference immunity and the accurate easy advantage in location.
Other features and advantages of the present invention will be set forth in instructions subsequently, and, partly from instructions, become obvious, perhaps understand through embodiment of the present invention.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
The scheme of installation of Fig. 1 when using according to the rail vehicle velocity-measuring system that the present invention is based on RFID;
Fig. 2 the present invention is based on the variation synoptic diagram of rail vehicle velocity-measuring system antenna footprint in the train traveling process of RFID for basis;
Fig. 3 and Fig. 4 the present invention is based on the schematic flow sheet of the rail vehicle speed-measuring method of RFID for basis.
In conjunction with accompanying drawing, Reference numeral is following in the embodiment of the invention:
The 1-train; 11-cab signal process computer; The vehicle-mounted RFID label reader of 12-; The 13-radio-frequency antenna; The 2-RFID label; The 3-track; The 4-antenna footprint.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
System embodiment
According to the embodiment of the invention,, a kind of rail vehicle velocity-measuring system based on RFID is provided referring to Fig. 1 and Fig. 2.
Present embodiment comprises even separation at least at the RFID sequence label that tests the speed and go up and is made up of a plurality of RFID labels that store label ID information at least (like one of them RFID label 2) with track (like track 3), and is installed on the rail vehicle to be measured (like train 1) and is used for calculating based on the identification information that corresponding RF ID label provides the RFID speed measuring device of the real-time gait of march of rail vehicle to be measured.
Here a plurality of RFID labels in the RFID sequence label can comprise and can store the ID label, and can offer a plurality of passive RFID tags or a plurality of active RFID tag in user's 64 bit-identify storage spaces and 512 user profile spaces; The identification information that corresponding RF ID label provides comprises the time for reading of label ID and this label ID of corresponding RF ID at least.
Above-mentioned RFID speed measuring device; At least the RFID label reader and the signal Processing computing machine that comprise antenna, be complementary with a plurality of RFID labels; Antenna can comprise radio-frequency antenna (like radio-frequency antenna 13); The RFID label reader can comprise vehicle-mounted RFID label reader (like vehicle-mounted RFID label reader 12); The signal Processing computing machine can comprise cab signal process computer (like cab signal process computer 11), in the signal Processing computing machine, stores in advance to comprise each RFID label at least and testing the speed with the tables of data of the positional information in the track.
Here, antenna is used to the radio-frequency channel that the RFID sequence label provides energy and is provided for realizing the reception and/or the transmission of radiofrequency signal; The RFID label reader is used for reading the identification information of corresponding RF ID label in the antenna footprint in proper order in real time at the rail vehicle traveling process, and is sent to the signal Processing computing machine; The signal Processing computing machine is used for searching the positional information of gained corresponding RF ID label in respective rail based on the identification information of RFID label reader transmission and in the tables of data of storage in advance, calculates, and obtains the gait of march of rail vehicle to be measured.
Particularly; As shown in Figure 1; The rail vehicle velocity-measuring system based on RFID of the foregoing description comprises the RFID sequence label on installation and the track, and is installed in vehicle-mounted RFID label reader, radio-frequency antenna and the cab signal process computer on the rail vehicle (like train 1).As shown in Figure 2, the RFID sequence label is installed on the track, in order to guarantee the requirement of locomotive velocity measuring range finding, on this line track that tests the speed based on the rail vehicle velocity-measuring system of RFID of needs, the RFID sequence label is installed; The RFID sequence label can adopt passive RFID tags, and this RFID label has label ID memory function, offers user's 64 bit-identify storage spaces and 512 user profile spaces.In the RFID sequence label of on line track, installing, label ID stores according to certain rule; In the cab signal process computer, store the order (promptly store in advance and comprise each RFID label at least) of label ID on the line track simultaneously in the tables of data that tests the speed with the positional information in the track.
In the train traveling process, travel on the track, radio-frequency antenna has certain coverage (referring to Fig. 2), and when train was advanced, radio-frequency antenna coverage (can referring to the antenna footprint among Fig. 2 4) moved forward simultaneously.
In the traveling process, vehicle-mounted RFID label reader is owing to the variation of radio-frequency antenna coverage, and the label ID that vehicle-mounted RFID label reader reads also can change, and promptly vehicle-mounted RFID label reader can read different label ID.Vehicle-mounted RFID label reader is noted each label ID and time for reading of reading constantly, and these identification informations are sent to the cab signal process computer.
The cab signal process computer is according to the label ID that reads; In data table memory, search this label be arranged in circuit positional information (promptly in advance the storage tables of data search the positional information of gained corresponding RF ID label in respective rail); In conjunction with the time for reading of respective labels ID, can obtain train speed.
For example, can be referring to Fig. 2, because radio-frequency antenna has certain coverage, when the arrangement pitch of RFID label is very little, has a plurality of RFID labels simultaneously and read by vehicle-mounted RFID label reader; And vehicle-mounted RFID label reader is installed on the train, and the distance of its radio-frequency antenna distance R FID label mounting plane is a definite value, and the angle of radiation of radio-frequency antenna is also fixed, so the coverage of radio-frequency antenna is fixed.
Vehicle-mounted RFID label reader will read all the RFID label datas in the radio-frequency antenna coverage at any time, when computing velocity, only adopts the label ID computing velocity that is read for the first time.
Can establish T1 moment train and read RFID label A 1 for the first time, its position in electronic chart is S1; T2 train constantly reads RFID label A 2 for the first time, and its position in electronic chart is S2, and then train at the average velocity of T2-T1 in the time is: V=(S2-S1)/(T2-T1).It is enough short that the enough little and vehicle-mounted RFID label reader of laying when the RFID label of spacing reads the time that the label ID of corresponding RF ID label spent, and can think that above-mentioned speed reaches to be the real-time speed of train.
The rail vehicle velocity-measuring system based on RFID of the foregoing description can provide a kind of not only economy but also the very speed-measuring method of the train of high resolving power and reliability is arranged.Empirical tests, a RFID label stops the time of 5ms in the radio-frequency antenna coverage, can be by vehicle-mounted RFID label reader reading tag ID; The length range that radio-frequency antenna covers is 250mm, and therefore can draw the speed that maximum tests the speed is 180km/h.
All for example have problem such as dally, skid based on the present various rail vehicle distance measuring equipment that tests the speed, and the accurate location of rail vehicle also is the difficult problem with positioning system of testing the speed at present; Can the rail vehicle velocity-measuring system based on RFID of the foregoing description be applied to testing the speed of rail vehicle,, for vehicle accurate absolute location information be provided simultaneously mainly to solve the problem that tests the speed of rail vehicle.
Method embodiment
According to the embodiment of the invention,, a kind of rail vehicle speed-measuring method based on RFID is provided like Fig. 3 and shown in Figure 4.
As shown in Figure 3, the rail vehicle speed-measuring method based on RFID of present embodiment comprises:
Step 100: on testing the speed with track, even separation RFID sequence label, this RFID sequence label is made up of a plurality of RFID labels that store label ID information at least; And, on rail vehicle to be measured, the RFID speed measuring device is installed;
Step 101:RFID speed measuring device calculates based on the identification information that corresponding RF ID label provides, and obtains the RFID speed measuring device of the real-time gait of march of rail vehicle to be measured;
In step 101; A plurality of RFID labels in the RFID sequence label; At least comprise and to store the ID label, and can offer a plurality of passive RFID tags or a plurality of active RFID tag in user's 64 bit-identify storage spaces and 512 user profile spaces, for example the rfid label of various encapsulation such as low frequency (LF) rfid label, high frequency (HF) rfid label and ultrahigh frequency (and UHF) rfid label; Identification information comprises the time for reading of label ID and this label ID of corresponding RF ID at least.
In the above-described embodiments, as shown in Figure 4, above-mentioned steps 101 specifically can comprise:
Step 200: adopt antenna,, and be provided for realizing the radio-frequency channel of the reception and/or the transmission of radiofrequency signal for the RFID sequence label provides energy;
In step 200, antenna comprises radio-frequency antenna at least;
Step 201: adopt the RFID label reader that is complementary with a plurality of RFID labels, in the rail vehicle traveling process, order reads the identification information of corresponding RF ID label in the antenna footprint in real time, and sends;
In step 201, the RFID label reader comprises vehicle-mounted RFID label reader at least;
Step 202: adopt the signal Processing computing machine, in this signal Processing computing machine, store in advance and comprise each RFID label at least and testing the speed with the tables of data of the positional information in the track; The identification information that sends based on the RFID label reader and in the tables of data of storage in advance, search the positional information of gained corresponding RF ID label in respective rail calculates, and obtains the signal Processing computing machine of the gait of march of rail vehicle to be measured;
In step 202, the signal Processing computing machine comprises the cab signal process computer at least.
The rail vehicle speed-measuring method based on RFID of the foregoing description can be realized through the rail vehicle velocity-measuring system based on RFID in the system embodiment.Be somebody's turn to do formation and performance based on the rail vehicle velocity-measuring system of RFID, the related description that can participate in system embodiment and Fig. 1 and Fig. 2 repeats no more at this.
In sum, rail vehicle velocity-measuring system and the method based on RFID of above-mentioned each embodiment of the present invention are arranged in the passive RFID tags sequence on the track, utilize vehicle-mounted RFID label reader order reading tag ID; Utilize the label ID of RFID tag storage, the corresponding data in conjunction with mobile unit (like vehicle-mounted RFID label reader and cab signal process computer) provides obtains the positional information of corresponding RF ID label in line track; Utilize the positional information of corresponding RF ID label in line track and the time for reading of respective labels ID, train effective speed.Should also can be applicable to other rail mounted mode of transportation based on rail vehicle velocity-measuring system and the method for RFID, and along other object of permanent haulage line orbital motion.
It is thus clear that rail vehicle velocity-measuring system and the method based on RFID of above-mentioned each embodiment of the present invention can reach following beneficial effect at least:
⑴ hardware cost is low, small investment, good economy performance;
⑵ hardware configuration is simple and reliable, is easy to safeguard;
⑶ the coverage that tests the speed is big, can guarantee the scope that tests the speed of 0.1km/h-180km/h at least;
⑷ can obtain the precise position information of object under test (like train) in real time.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. rail vehicle velocity-measuring system based on RFID; It is characterized in that; At least comprise the RFID sequence label that even separation is formed on testing the speed with track and by a plurality of RFID labels that store label ID information at least, and be installed on the rail vehicle to be measured and be used for calculating the RFID speed measuring device of the real-time gait of march of rail vehicle to be measured based on the identification information that corresponding RF ID label provides.
2. the rail vehicle velocity-measuring system based on RFID according to claim 1; It is characterized in that; Said RFID speed measuring device; At least comprise and be used to the antenna of radio-frequency channel that the RFID sequence label provides energy and is provided for realizing reception and/or the transmission of radiofrequency signal; Be complementary with said a plurality of RFID labels and be used for the rail vehicle traveling process in real time order read the identification information of corresponding RF ID label in the said antenna footprint and the RFID label reader that sends, and store in advance and comprise each RFID label at least and testing the speed with the tables of data of the positional information in the track and be used for identification information and corresponding RF ID label based on said RFID label reader transmission obtain the gait of march of rail vehicle to be measured in the positional information calculation of respective rail signal Processing computing machine.
3. the rail vehicle velocity-measuring system based on RFID according to claim 1 and 2; It is characterized in that; A plurality of RFID labels in the said RFID sequence label comprise at least and can store the ID label, and can offer a plurality of passive RFID tags or a plurality of active RFID tag in user's 64 bit-identify storage spaces and 512 user profile spaces.
4. the rail vehicle velocity-measuring system based on RFID according to claim 1 and 2 is characterized in that, said identification information comprises the time for reading of label ID and this label ID of corresponding RF ID at least.
5. the rail vehicle velocity-measuring system based on RFID according to claim 1 and 2 is characterized in that said RFID label reader comprises vehicle-mounted RFID label reader at least, and/or,
Said antenna comprises radio-frequency antenna at least, and/or,
Said signal Processing computing machine comprises the cab signal process computer at least.
6. the rail vehicle speed-measuring method based on RFID is characterized in that, comprising:
A, on testing the speed with track, even separation RFID sequence label, this RFID sequence label is made up of a plurality of RFID labels that store label ID information at least; And, on rail vehicle to be measured, the RFID speed measuring device is installed;
B, RFID speed measuring device calculate based on the identification information that corresponding RF ID label provides, and obtain the RFID speed measuring device of the real-time gait of march of rail vehicle to be measured.
7. the rail vehicle speed-measuring method based on RFID according to claim 6 is characterized in that step b specifically comprises:
Adopt antenna,, and be provided for realizing the radio-frequency channel of the reception and/or the transmission of radiofrequency signal for the RFID sequence label provides energy;
Adopt the RFID label reader that is complementary with a plurality of RFID labels, in the rail vehicle traveling process, order reads the identification information of corresponding RF ID label in the said antenna footprint in real time, and sends; And,
Adopt the signal Processing computing machine, in this signal Processing computing machine, store in advance and comprise each RFID label at least and testing the speed with the tables of data of the positional information in the track; The identification information that sends based on said RFID label reader and in the tables of data of storage in advance, search the positional information of gained corresponding RF ID label in respective rail; Calculate, obtain the signal Processing computing machine of the gait of march of rail vehicle to be measured.
8. according to claim 6 or 7 described rail vehicle speed-measuring methods based on RFID; It is characterized in that; In step b; A plurality of RFID labels in the said RFID sequence label comprise at least and can store the ID label, and can offer a plurality of passive RFID tags or a plurality of active RFID tag in user's 64 bit-identify storage spaces and 512 user profile spaces.
9. according to claim 6 or 7 described rail vehicle speed-measuring methods, it is characterized in that in step b, said identification information comprises the time for reading of label ID and this label ID of corresponding RF ID at least based on RFID.
10. according to claim 6 or 7 described rail vehicle speed-measuring methods, it is characterized in that in step b, said RFID label reader comprises vehicle-mounted RFID label reader at least based on RFID, and/or,
Said antenna comprises radio-frequency antenna at least, and/or,
Said signal Processing computing machine comprises the cab signal process computer at least.
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Application publication date: 20120919 |