CN100576280C - Micro ground buried coil type fixing traffic flow investigation equipment - Google Patents
Micro ground buried coil type fixing traffic flow investigation equipment Download PDFInfo
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- CN100576280C CN100576280C CN200810048978A CN200810048978A CN100576280C CN 100576280 C CN100576280 C CN 100576280C CN 200810048978 A CN200810048978 A CN 200810048978A CN 200810048978 A CN200810048978 A CN 200810048978A CN 100576280 C CN100576280 C CN 100576280C
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Abstract
Micro ground buried coil type fixing traffic flow investigation equipment, it comprises micro ground buried coil, signal amplifier, detecting device, data transmission terminal, the Internet, data center, and micro ground buried coil is connected successively with signal amplifier, detecting device, data transmission terminal, the Internet, data center.It has overcome, and traditional miniature coils detecting device is very difficult to be discerned vehicle, and wiring distance can not be oversize, detects track quantity and can not wait shortcoming too much.The present invention utilizes ground induction coil to detect principle, can realize the information of vehicle flowrate collection of highway, bridge, tunnel and special road section, authentic and valid reflection traffic flow data.
Description
Technical field
The present invention relates to a kind of micro ground buried coil type fixing traffic flow investigation equipment.It utilizes ground induction coil to detect principle, can realize the information of vehicle flowrate collection of highway, bridge, tunnel and special road section, authentic and valid reflection traffic flow data.
Background technology
In the existing traffic flow investigation device, having a kind of is to adopt traditional micro ground buried coil, is used to detect information of vehicle flowrate and traffic flow data on the highway.But this micro ground buried coil has some very serious drawbacks: 1. owing to the polarised direction of induced signal polarity by vehicle decides, and the polarised direction of vehicle can not be absolute consistent, its manufacturing by steel plate, processing even vehicle are subjected to all multifactor decisions such as influence in magnetic field of the earth, therefore the detected signal polarity in coil two ends is inconsistent, rear end identification difficult treatment.2. the induced signal Strength Changes is very big, vehicle is by in the coil process, signal difference even can reach 10000 times, when different vehicle is passed through coil under different situations, signal maximum and mean value intensity difference are apart from also reaching this level, add the inconsistent problem of aforesaid polarity, the Design of Amplifier difficulty is very big, and signal is very easily distortion in amplification process.3. because route or travel by vehicle is not quite identical, even same car repeatedly by same surveyed area, also may obtain difference even the very big signal of difference.Even 4. under perfect condition, the intensity of signal still depends on two parameters, the magnetic field of the speed of a motor vehicle and vehicle simultaneously.Same car is under the different situation of the speed of a motor vehicle, and the intensity of signal can change a lot.Be difficult to two parameters in the speed of a motor vehicle and vehicle magnetic field are separated.5. the magnetic field parameter of different vehicle, and corresponding relation is indeterminate between the vehicle is often also big than the difference of they and other vehicles with the difference between two cars of vehicle.Even under perfect condition, the speed of a motor vehicle is in full accord, also be difficult to find the relation between magnetic field parameter and vehicle.6. generally, signal and faint is easy to be interfered, and it is also very fast to decay.7. the coil sensing range is less, the easy omission of dilly.In addition, the circuit design of traditional large-scale ground buried coil is also complicated.
Because these characteristics, traditional miniature coils detecting device are difficult to vehicle is discerned, generally all be the simple gate circuit of setting, it is output pulse signal that induced potential surpasses preset value, expression has a car to pass through.And wiring distance can not be oversize, and detecting track quantity can not be too many, to reduce decay and to disturb.
Along with the development of intermodulation cause, the requirement of intermodulation work improves constantly, and from simple set period count mode, develops into round-the-clock, branchs vehicle, the meter speed of a motor vehicle is observed.Miniature coils can't adapt to these requirements, this market of progressively having faded out for the moment.
Development along with highway cause and intermodulation cause, in the intermodulation automatic field, after the problem of " having " and " nothing " of having solved automation equipment with equipment such as traditional loop wire coils, highway division also begins to pay close attention to automation equipment to the destruction of highway, the stability and the relative soft indexs such as reliability of equipment.
In all buried detecting devices, miniature coils is a depth of burying maximum, and buried part-structure is very firm, is not vulnerable to vehicle and rolls the influence of safeguarding with the road surface.Simultaneously, the road area that need excavate when burying underground very little (each sensor only needs the aperture of a diameter 5CM), the destruction of road pavement is much smaller than burying the traditional endless coil underground.These characteristics improve needs the manufacturer and user of soft index such as the stability of above-mentioned destruction concerning highway, equipment and reliability, and rare advantage is arranged.
Along with the development of large scale integrated circuit and new digital circuit, by using new-type amplifier circuit and recognition processor, aforesaid those bottlenecks slowly no longer become the obstacle that miniature coils equipment is used.Since entering the nineties in last century, developed countries such as America and Europe have successively begun the exploitation and the utilization of miniature coils equipment of new generation.
Summary of the invention
The objective of the invention is to overcome above-mentioned existing disadvantages of background technology part, and a kind of micro ground buried coil type fixing traffic flow investigation equipment that can comprehensively replace traditional endless coil kind equipment is provided.
The objective of the invention is to reach: micro ground buried coil type fixing traffic flow investigation equipment by following measure, it comprises micro ground buried coil, signal amplifier, detecting device, data transmission terminal, the Internet, data center, micro ground buried coil and signal amplifier, detecting device, data transmission terminal, the Internet, data center connects successively, it is characterized in that each described micro ground buried coil is positioned at the centre in each track on the highway, and be connected in series with in the same way micro ground buried coil, two micro ground buried coils are installed on each track at interval, the micro ground buried coil that two rows are connected in series connects signal amplifier, micro ground buried coil is used to detect the information of vehicles that the road top is passed through, signal amplifier receives the signal from the magnetic test coil two ends, and signal amplified and analog-to-digital conversion process, obtain information of vehicles, detecting device is collected from the information of vehicles of amplifier, calculate type of vehicle, the speed transport information, data transmission terminal is transferred to data center by GPRS radio data network and the Internet with transport information.Described signal amplifier comprises power amplification circuit, presses commentaries on classics frequency circuit, square wave treatment circuit, power amplification circuit is connected successively with pressing commentaries on classics frequency circuit, square wave treatment circuit, power amplification circuit is connected with micro ground buried coil, after the induced potential signal at micro ground buried coil two ends strengthens by amplifying circuit, send into to press and change frequency circuit, change one group of signal of frequency change into, pass through the shaping of square wave treatment circuit then.Described detecting device comprises I/O card and 104 industrial computers, the I/O card is converted into 104 bus addresss with the frequency conversion square-wave signal of importing and can trains other signal to send in 104 industrial computers, 104 industrial computers carry out poll to the address field of appointment in the bus scope, in the specified cycle, the square-wave signal quantity that detection is sent into is measured type, speed transport information parameter to vehicle.
In technique scheme, described micro ground buried coil only needs the aperture of 5 centimetres of on road surface digging diameters when mounted, and coil is positioned at following 15 centimetres of road driveway.
Micro ground buried coil type fixing traffic flow investigation equipment of the present invention has following advantage:
Micro ground buried coil type fixing traffic flow investigation device performance parameters of the present invention
Simultaneously 1. micro ground buried coil type fixing traffic flow investigation equipment of the present invention also have road pavement and destroy little: relatively the road pavement load-carrying construction destroys the most serious wire casing, conventional coil is installed cuts 160.5 meters of wire casings altogether, miniature coils is installed only need be cut 45.3 meters of wire casings, less than 30% of conventional coil.Large-area wire casing causes the road surface be full of cracks easily and sink, and the needed circular hole of installation miniature coils is small-sized absolute construction (only 5 centimetres of diameters), and road pavement does not almost have influence.2. maintenance is little: conventional coil is subjected to the restriction of induced signal intensity, and the inductive coil degree of depth is greatly buried underground, generally apart from ground 4-6 centimetre.When the road surface occurs sinking and ftractures, very easily be damaged.Statistics shows, year maintenance rate average out to 30% of conventional coil.Micro ground buried coil is then fully different, because the coil lifting surface area is little, buries underground deeply, and coil taked all solid state encapsulation, and shell firm (degree of protection IP68) seldom is damaged.3. road surface maintenance and repair operation influence is little: along with expanding economy, urban road maintenance number of times is more and more intensive.When in carrying out road, repairing, can carry out milling and cover operation again to road usually.Traditional ground buried coil is not destroyed by the milling operation in this case, because cover causes the depth of burying to become big again, weak output signal can't be worked (as shown in Figure 2) exactly.At this moment, must cut wire casing again and lay coil.Usually each track needs 2000 yuan of expenses, 6 track sections of a standard carry out coil again laying task need spend 12000 yuan, and must sealing track 6-12 hour.Micro ground buried coil is not influenced by this then, because the depth of burying is big, no matter is milling operation or cover operation, all can not cause physical damage to coil, can therefore not bring extra maintenance cost.When carrying out heavy resurfacing, conventional coil is destroyed fully, need to lay fully again, cost and time with in repair suitable.And micro ground buried coil has adopted all solid state encapsulation, the shell protection grade is up to IP68 (state protection standard), can take out fully again and utilize, only need excavate wire casing again and just these coils can be installed once more with punching, cost only is 600 yuan in each track, and 6 track sections of a standard carry out coil and reinstall operation and only need spend 3600 yuan.
Like this, at a road in the time between overhaul, maintenance cost that conventional coil equipment caused by the road maintenance is installed up to 24000 yuan, the maintenance cost that miniature coils caused by the road maintenance is installed only 3600 yuan, only is equivalent to 15% of conventional coil.4. installation exercise is little to the driving influence: when 6 track sections to a standard carry out construction operation, need 160.5 meters of cutting wire casings altogether, miniature coils is installed only need be cut 45.3 meters of wire casings, less than 30% of conventional coil.If use identical work tool, the time that conventional coil sealing track is installed has surpassed one times that the miniature coils sealing track time is installed.If calculate the sealing track time of causing owing to maintenance in the time between overhaul, then gap is more obvious, and the coil that upholds one's heritage need seal the track 2 times altogether, and safeguards that miniature coils only need seal the track 1 time, and 25% of the coil that only upholds one's heritage always takes time.In any one modern metropolis, highway communication is all extremely huge to the economy and the social influence in city, the shorter activity duration can make the installation and maintenance operation that the negative effect that highway communication causes is reduced to minimum, and has significantly reduced expected indirect economic loss.
Description of drawings
Fig. 1 is a system block diagram of the present invention.
Fig. 2 is the synoptic diagram of burying underground of existing ground buried coil.
Fig. 3 is the synoptic diagram of burying underground of ground buried coil of the present invention.
Fig. 4 is program execution flow figure of the present invention.
Fig. 5 is a system architecture block scheme of the present invention.
1. micro ground buried coils, 2. conventional coil among the figure.
Embodiment
Describe performance of the present invention in detail below in conjunction with accompanying drawing, but they do not constitute limitation of the invention, simultaneously by illustrating that advantage of the present invention will become clear more and understanding easily.
Consult accompanying drawing as can be known: micro ground buried coil type fixing traffic flow investigation equipment of the present invention, it comprises micro ground buried coil, signal amplifier, detecting device, data transmission terminal, the Internet, data center, micro ground buried coil and signal amplifier, detecting device, data transmission terminal, the Internet, data center connects successively, it is characterized in that described each micro ground buried coil is positioned at the centre in each track on the highway, and be connected in series with in the same way micro ground buried coil, two micro ground buried coils are installed on each track at interval, the micro ground buried coil that two rows are connected in series connects signal amplifier, micro ground buried coil is used to detect the information of vehicles that the road top is passed through, signal amplifier receives the signal from the magnetic test coil two ends, and signal amplified and analog-to-digital conversion process, obtain information of vehicles, detecting device is collected from the information of vehicles of amplifier, calculate type of vehicle, transport information such as speed, data transmission terminal is transferred to data center (as Fig. 1 by GPRS radio data network and the Internet with transport information, shown in Figure 5).
Micro ground buried coil is positioned at following 15 centimetres of road driveway, signal amplifier comprises power amplification circuit, presses commentaries on classics frequency circuit, square wave treatment circuit, power amplification circuit is connected successively with pressing commentaries on classics frequency circuit, square wave treatment circuit, power amplification circuit is connected with micro ground buried coil, after the induced potential signal at micro ground buried coil two ends strengthens by amplifying circuit, sending into to press changes frequency circuit, changes one group of signal of frequency change into, passes through the shaping of square wave treatment circuit then.Detecting device comprises I/O card and 104 industrial computers, the I/O card is converted into 104 bus addresss with the frequency conversion square-wave signal of importing and can trains other signal to send in 104 industrial computers, 104 industrial computers carry out poll to the address field of appointment in the bus scope, in the specified cycle, the square-wave signal quantity that detection is sent into is measured transport information parameters (as shown in Figure 1 and Figure 2) such as type to vehicle, speed.
Consult accompanying drawing 4 as can be known: behind program start, open collecting thread, processing threads and serial ports receiving thread successively, and finally carry data by the timed sending module.
After collecting thread is data with the Feature Conversion of vehicle, processing threads carries out calculation process to these data, obtain parameters such as type of vehicle, speed, time headway, and after deliver to communication module (timed sending), simultaneously the modulation parameter of serial ports receiving thread receiving remote is carried out poll to collecting thread.
Miniature coils traffic flow information collecting device of the present invention has adopted following technological means: (1), used the New Digital amplifying circuit, this circuit has adopted positive negative bipolar power supply power supply, no matter vehicle polarised direction equal amplifying signal normally how.(2), amplifier adopts the extremely low frequency signal directly to be coupled, the digital amplifier of constant multiplying power can guarantee induced signal as far as possible little distortion in amplification process.(3), amplifier is output as digital signal, is difficult for being interfered, the attenuation effect that wiring brings also is much smaller, and can support long distance wiring and multilane to detect simultaneously.(4), the amplifier gain height, the sensing range of single coil has reached the level of conventional large-scale coil.(5), when signal is detected, introduced " rate of rise " parameter, (legacy equipment is because the serious distortion of amplifying circuit for parameters such as " descending slopes ", can not detect this class and the close parameter of original waveform), these parameter lists reveal with the speed of a motor vehicle closely related, substantially linear, and the kind of vehicle pass course and vehicle is little to its influence.(6), by radially laying two probes, can obtain four on vehicle and pass through time parameter,, can accurately detect the real-time speed of vehicle by detection zone in conjunction with Slope Parameters, in speed of a motor vehicle parameter and Slope Parameters substitution signal algorithm, finally can obtain vehicle magnetic signature parameter.(7), the magnetic signature parameter that goes out of aforementioned calculation, with the type of vehicle substantial connection is arranged, but still can not be corresponding one by one with Ministry of Communications 9 vehicle standards.9 vehicles that Ministry of Communications determines are from management view.We are built-in vehicle class parameter library considerably beyond 9 kinds in main frame, then by mapping table wherein the plurality of vehicles kind incorporate a certain vehicle of Ministry of Communications into.
Claims (2)
1, micro ground buried coil type fixing traffic flow investigation equipment, it comprises micro ground buried coil, signal amplifier, detecting device, data transmission terminal, the Internet, data center, micro ground buried coil and signal amplifier, detecting device, data transmission terminal, the Internet, data center connects successively, it is characterized in that each described micro ground buried coil is positioned at the centre in each track on the highway, and be connected in series with in the same way micro ground buried coil, two micro ground buried coils are installed on each track at interval, the micro ground buried coil that two rows are connected in series connects signal amplifier, micro ground buried coil is used to detect the information of vehicles that the road top is passed through, signal amplifier receives the signal from the magnetic test coil two ends, and signal amplified and analog-to-digital conversion process, obtain information of vehicles, detecting device is collected from the information of vehicles of amplifier, calculate type of vehicle, the speed transport information, data transmission terminal is transferred to data center by GPRS radio data network and the Internet with transport information; Described signal amplifier comprises power amplification circuit, presses commentaries on classics frequency circuit, square wave treatment circuit, power amplification circuit is connected successively with pressing commentaries on classics frequency circuit, square wave treatment circuit, power amplification circuit is connected with micro ground buried coil, after the induced potential signal at micro ground buried coil two ends strengthens by amplifying circuit, send into to press and change frequency circuit, change one group of signal of frequency change into, pass through the shaping of square wave treatment circuit then; Described detecting device comprises I/O card and 104 industrial computers, the I/O card is converted into 104 bus addresss with the frequency conversion square-wave signal of importing and can trains other signal to send in 104 industrial computers, 104 industrial computers carry out poll to the address field of appointment in the bus scope, in the specified cycle, the square-wave signal quantity that detection is sent into is measured type, speed transport information parameter to vehicle.
2, micro ground buried coil type fixing traffic flow investigation equipment according to claim 1 it is characterized in that described micro ground buried coil only needs the aperture of 5 centimetres of on road surface digging diameters when mounted, and coil is positioned at following 15 centimetres of road driveway.
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| CN200810048978A CN100576280C (en) | 2008-08-25 | 2008-08-25 | Micro ground buried coil type fixing traffic flow investigation equipment |
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| CN200810048978A CN100576280C (en) | 2008-08-25 | 2008-08-25 | Micro ground buried coil type fixing traffic flow investigation equipment |
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| CN101383097A CN101383097A (en) | 2009-03-11 |
| CN100576280C true CN100576280C (en) | 2009-12-30 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101833860B (en) * | 2010-05-11 | 2012-01-04 | 武汉市路安电子科技有限公司 | High-precision ultrasonic fixed traffic flow investigation equipment |
| CN102254437A (en) * | 2011-06-29 | 2011-11-23 | 东南大学 | Method and device capable of shortening feeder of loop vehicle detector |
| WO2013084287A1 (en) * | 2011-12-06 | 2013-06-13 | 三菱電機株式会社 | Center system and vehicle system |
| CN102760360B (en) * | 2012-07-26 | 2014-07-09 | 南京洛普股份有限公司 | Traffic intersection vehicle flow single detector detection method based on decision theory |
| CN103679826B (en) * | 2013-12-02 | 2017-01-04 | 深圳市捷顺科技实业股份有限公司 | The method and device of a kind of ground sensing control Paper ticket machine card release |
| CN104751633A (en) * | 2015-04-03 | 2015-07-01 | 上海铭联信息技术有限公司 | Vehicle detector |
| CN104821085B (en) * | 2015-05-19 | 2017-01-04 | 太原理工大学 | A kind of method measured based on rectangle unicoil speed vehicle commander |
| CN106781535A (en) * | 2017-03-27 | 2017-05-31 | 河北德冠隆电子科技有限公司 | A kind of ultra micro coil vehicle detector |
| CN109544977B (en) * | 2018-12-27 | 2020-10-16 | 东南大学 | Intelligent parking management system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4968979A (en) * | 1985-04-19 | 1990-11-06 | Omron Tateisi Electronics Co. | Vehicle detecting system |
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- 2008-08-25 CN CN200810048978A patent/CN100576280C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4968979A (en) * | 1985-04-19 | 1990-11-06 | Omron Tateisi Electronics Co. | Vehicle detecting system |
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Address after: Room 305, 3rd floor, No.3 Factory building, Guanggu Electronic Industrial Park, No.9, liufangyuan South Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430000 Patentee after: Wuhan Lu'an Electronic Technology Group Co.,Ltd. Address before: 430015 13-17 Pengfei huting, 267 Hong Kong Road, Jianghan District, Wuhan City, Hubei Province Patentee before: WUHAN LU AN ELECTRONIC TECHNOLOGY Co.,Ltd. |
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