CN104900067A - Intelligent wireless vehicle detection system based on geomagnetic sensor - Google Patents
Intelligent wireless vehicle detection system based on geomagnetic sensor Download PDFInfo
- Publication number
- CN104900067A CN104900067A CN201510279534.7A CN201510279534A CN104900067A CN 104900067 A CN104900067 A CN 104900067A CN 201510279534 A CN201510279534 A CN 201510279534A CN 104900067 A CN104900067 A CN 104900067A
- Authority
- CN
- China
- Prior art keywords
- access point
- sensor
- sensor node
- information
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 36
- 230000005291 magnetic effect Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000005358 geomagnetic field Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 16
- 230000006870 function Effects 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 9
- 230000006698 induction Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000007726 management method Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000005055 memory storage Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 241000283070 Equus zebra Species 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention discloses an intelligent wireless vehicle detection system based on geomagnetic sensors. The intelligent wireless vehicle detection system detects vehicle information, including presence of a vehicle and vehicle speed, through the geomagnetic sensors and wireless technology. The system comprises two portions, sensor nodes buried underground for detecting vehicle information, and an access point for receiving information sent by the sensor node, analyzing the information and reporting the information to a background server, wherein the access point and the sensor nodes are communicated with each other through a wireless means. One access point can communicate with a plurality of sensor nodes. The working frequency of the wireless communication of the system could be 433MHz, 900 MHz, 2.4 GHz, 5.8GHz and other common free frequency ranges. The intelligent wireless vehicle detection system can rapidly and effectively detect vehicle information without being affected by weather, light and other factors, and the detected vehicle information can be returned to a control center through a public network to optimize traffic.
Description
Technical field
The present invention relates to intelligent parking equipment technical field, be specifically related to a kind of intelligent radio vehicle detecting system based on geomagnetic sensor.
Background technology
Road traffic is made up of dynamic traffic and static traffic.So-called " static traffic " refers to that vehicle is parked in road, parking lot, station, goods yard etc. or the traffic behavior of temporal persistence.Although parking object is different, time length is different, they are static traffics, are the continuation of dynamic traffic.Static traffic, for dynamic traffic, is the important component part in whole railway and highway system.Static traffic is not resolved, and dynamic traffic has no idea to resolve.Such as arrived destination and can not find parking lot, just must gyrate, this is just adding the invalid magnitude of traffic flow virtually.
But the management function in current most domestic parking lot is also the function such as charge, guiding in single parking lot, does not possess city networked capabilities, can not realize city parking inducing function.On the other hand, the parking guidance system that huge fund is built is thrown in urban, is all generally by parking one-level, secondary, three grades of induced screen Song inductions, because inducible form is single, involve great expense, build difficulty, use the reasons such as inconvenience, is difficult to popularize.
Transport solution safely, block up and parking difficulty problem become recent City ITS development main target.The key realizing intelligent transportation system is to build by sensing network, communications facility, network surpasses calculation, intelligent software is formed intelligent basis facility, according to requirement that is reliable, Low-cost Information, build ubiquitous information system based on WebGIS, make the industry based on data and knowledge become important emerging mainstay industry.
Comprehensive information acquisition means and the abundant information content are to provide the prerequisite of perfect information service, and it is crucial for how obtaining original traffic data and being processed into transport information accurately.For the collection of real time traffic data, mainly contain two kinds of modes at present: one is static traffic detection mode, the fixed point detecting device mainly utilizing position fixing or video camera; Another kind is dynamic traffic detection mode, and usually, the fixed point detecting device being used for gathering traffic flow data has induction coil checker, ultrasonic detector, radar detector, photoelectric detector, infrared detector etc.Dynamic traffic detection mode refers to that the vehicle that position-based constantly changes or mobile phone are to obtain the data acquisition modes of the transport information such as real-time road speed and hourage.Dynamic traffic detection typical way comprises transponder, vehicle detects automatically, GPS (GPS) device and mobile communication etc.
Coil and video camera (video monitoring) are the exemplary means that fixed point detects.Coil is the one distortion of magnetic detector, and its dependence is embedded in the electromagnetic induction change of one or one group inductive coil generation under road surface, detects the situation of the vehicle passed through.This technology is very ripe, and precision is higher, is applicable to the road that the volume of traffic is larger.But also clearly, namely acquisition range is limited, spoilage is high, construction cost is expensive, long construction period for its shortcoming.Video monitoring is then utilize video camera as recording unit, by drawing the particulars of traffic flow to the image analysis in certain hour section.For the investigation of intersection traffic situation, often adopt in this way.The advantage of this method is relatively more directly perceived, can obtain transit information information the most completely; Shortcoming is that cost is high, data preparation workload large (needing a large amount of image processing work), sometimes fiduciary level lower (as oversize vehicle may block accompanying dilly etc.).
As the Main Means of Dynamic Traffic Flow information acquisition, GPS technology is widely used abroad, domesticly also have excellent way, the company such as beautiful and intelligent developed can be commercial product.GPS is a kind of global, round-the-clock satelline radio positioning system, the spatial information such as three-dimensional coordinate, speed can be provided in real time, be characterized in that precision is high, speed is fast, but also have a lot of problem in practical application, be mainly manifested in exist gather blind area (as the road overhead under does not collect gps signal), sample size is little, construction and operation cost high.
Along with sensor technology, the communication technology, GIS technology (Geographic Information System), 3S technology (remote sensing technology, Geographic Information System, GPS three kinds of technology) and the development of computer technology, the collection of transport information experienced by from manually, single magnetic detector collects multi-source, the evolution of multiple acquisition mode combination, simultaneously along with domestic and international progressively going deep into transport information treatment research, statistical analysis technique, artificial intelligence technology, Data fusion technique, parallel computings etc. are progressively applied in the process of transport information, the process of transport information is made also constantly to be developed and reform.
Information acquisition and treatment facility, as the core component part of intelligent transportation system, under the overall fast-developing drive of intelligent transportation industry, present rapid growth situation in recent years.2009 annual rate of investment reach 8,200,000,000 yuan, within 2010, reach 9,900,000,000 yuan, increase by 21% on a year-on-year basis.Estimate that continuation is kept steady growth by 2010-2015 industry speedup, annual compound growth rate is about 19.4%.
Along with expanding economy, automobile becomes new consumption hotspot and point of economic increase, quantity rapidly increases, current, China's Private Car owning amount has broken through 1,000 ten thousand, along with automobile enters individual family in enormous quantities, and city planning generally relatively lags behind, soil is not enough per capita, makes the problem of parking difficulty appear at even small and medium-sized cities, big and medium-sized cities, and is becoming increasingly acute.
Carefully analyze the parking garage systems of current domestic city, be not difficult to find: on the one hand, the surge of road travel quantity, parking difficulty, the problem of driving difficulty becomes increasingly conspicuous; On the other hand, owing to not having unified management, distribution and guidance, each parking garage systems is managed voluntarily by constituent parts department, and lack information communication, parking lot essential information is come into the open not, often occurs that garage system has storehouse without car, the phenomenon of a large amount of garage stall waste is serious.Which results in motorist and there is very large blindness when looking for parking position, bring the wagon flow that detours, add the pressure of road traffic.
A lot of people had such experience, drive some region, city time, often can not find suitable parking stall, the traffic congestion caused this is abhored and is had no way out, and Here it is because we lack enough information and make correct judgement and induction in time.Meanwhile, disorderly receive the problems such as parking fee also day by day serious, have impact on the use of road, bring pressure to urban traffic control.
Parking is roughly divided into curb parking and parking lot (storehouse) stops, flat rate system is generally carried out in parking lot (storehouse), in units of the moon, pay certain expense, the laws of use that curb parking is not generally fixed just pays expense in due order or on time when using parking stall; This all disorderly collects Parking Fee mainly through parking stall managerial personnel, the dispute of easy generation expense, and efficiency is low, and handling cost is high.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of intelligent radio vehicle detecting system based on geomagnetic sensor, information of vehicles can be detected fast and effectively, do not affect by the factor such as weather and light, the information of vehicles simultaneously detected turns back to control center by public network, contributes to the optimization of road traffic.
Technical matters to be solved by this invention realizes by the following technical solutions:
Based on an intelligent radio vehicle detecting system for geomagnetic sensor, utilize geomagnetic sensor and wireless technology to realize the detection of information of vehicles, comprise the information such as the presence or absence of vehicle, the speed of a motor vehicle.This system comprises two parts: one is used to the sensor node detecting information of vehicles, this sensor node is embedded in underground, two are used to the information that receiving sensor node sends over, and carry out analyzing and processing, report the access point of background server, the communication mode between described access point and sensor node adopts wireless mode to realize; Meanwhile, an access point can communicate to multiple sensor node simultaneously, and the frequency of operation that Radio Communication adopts can be the conventional free frequency range such as 433MHz, 900MHz, 2.4GHz and 5.8GHz.
Communication mode between described sensor node and access point adopts TDMA mode to realize, communication between each sensor node and access point takies a time slot, the data protocol according to a preconcerted arrangement of data communication between the two carries out, and the distribution of time slot and access point carry out controlling and distribute.
Described sensor node comprises geomagnetic sensor, control and treatment circuit (containing analog to digital conversion circuit), RF transmit-receive circuit, antenna and a few bulk of power circuit, described geomagnetic sensor connects control and treatment circuit, described control and treatment circuit connects RF transmit-receive circuit, and described antenna is connected on RF transmit-receive circuit; Described power circuit completes the function of supplying power of whole node, due in outdoor environment application, adopts powered battery mode, and the selection of battery capacity needs to consider the factors such as the employing frequency of frequency data communication between sensor node and access point, sensor.
Described geomagnetic sensor adopts terrestrial magnetic field, the solid-state version sensor of anisotropy (AMR), the presence or absence of eternal detection vehicle, or the change that different motion state causes geomagnetic field disturbance, as adopted HMC104x and the HMC105x series of honeywell, thus can the detection data that obtain of base area Magnetic Sensor, the response threshold of setting vehicle judges the status information of vehicle, wherein event detection threshold values, optimal design-aside can be carried out according to actual use occasion without event monitoring threshold values and event retention time three parameters, thus improve monitoring reliability.
Described antenna is used for the radio communication between access point, because sensor node is embedded in underground, considers the relative complex of surrounding environment, and the antenna of sensor side adopts ceramic antenna to realize, for improving the antijamming capability of antenna.
Described RF transmit-receive circuit completes modulation to baseband signal, demodulation, the function such as amplification and filtering, consider the radio communication with incoming end, simultaneously because frequency of operation is in free band, there is a large amount of co-channel interference signals, RF transmit-receive circuit can select the chip of ready-made band wireless communication protocol, as selected the chip (CC2420 etc. of TI) supporting ZigBee technology.
Described control and treatment circuit for realizing the control of the work schedule to whole sensor, and controls the employing of analog to digital conversion circuit realization to the signal of geomagnetic sensor.
Described sensor node end only carries out simple pre-service to the data adopted, thus not high to the performance requirement of control and treatment circuit, and MSP430 single-chip microcomputer can be adopted to complete.
Described access point for receive and processes sensor node send over data, sensor node carried out to timing synchronization and control and to communicate with background service and to carry out the work such as data report; Whole access point comprises antenna, RF transmit-receive circuit, central processing unit, storage element and network communication unit, and described network communication unit realizes the access port of access point to public network, and simultaneously the whole access point mode adopting POE to power of powering realizes.
Process owing to needing the sampled data of coming to sensor node and analyze, and simultaneously parallelly to communicate with backstage, therefore access point adopts the central processing unit (cpu) that performance is stronger to realize, and is equipped with external memory storage, and transplants real time operating system.
Adopt in native system and transplant real-time Linux system for central processing unit, RF transmit-receive circuit and sensor node match, identical chip can be selected to realize, antenna on access point is different from antenna on sensor node, access point needs to communicate with multiple sensor node type in real time, in gain, directional diagram and polarization characteristic, have higher requirement.
Native system embodiment is as follows: for road application, sensor node is embedded in track central authorities, buries 2 sensor nodes before and after on each track, successively can be calculated the speed of vehicle according to vehicle by the mistiming of these two sensor nodes.Meanwhile, through adding up vehicle flowrate and the jam situation that can analyze this road for a long time.For improving the reliability detected, a sensor node can be additionally installed on track before two sensors and do advanced detection.According to different road conditions such as city, rural area and high speeds, before and after between two sensor nodes, the response family of power and influence of the Distance geometry sensor of difference needs to arrange respectively.
Parking lot, garage etc. are stopped and applies, need, in centre position, garage, a sensor node is installed, detect according to the change in magnetic field under the presence or absence different conditions of car amount.
Under above-mentioned two kinds of different application scenes, the installation of access point is generally positioned in the air, on optional electric pole and street lamp pole, guarantees that the antenna footprint of access point can comprise whole sensor nodes.
Geomagnetic sensor can be used for the existence and the vehicle cab recognition that detect vehicle, this vehicle that utilizes is by completing the sensor of vehicle detection compared with ground induction coil detecting device conventional at present on the impact in magnetic field of the earth during road, have that installation dimension is little, highly sensitive, construction volume is little, long service life, the advantage such as the destruction of road pavement is little, application in the basic data acquisitions such as the magnitude of traffic flow, roadway occupancy, speed is more and more wider, in vehicle Flow Detection this segment market on occupation rate also will grow out of nothing, usage ratio will progressively improve.The ground induction coil of existing main flow that geomagnetic sensor replaces (or compensation) will be that the general trend of events taken advantage of.
The invention has the beneficial effects as follows:
1) utilize vehicle by completing the sensor of vehicle detection during road to the impact in magnetic field of the earth compared with ground induction coil detecting device conventional at present, have that installation dimension is little, highly sensitive, construction volume is little, long service life, the advantage such as the destruction of road pavement is little, has broad application prospects in the information acquisition of intelligent transportation system.
2) information of vehicles can be detected fast and effectively, not affect by the factor such as weather and light.The information of vehicles simultaneously detected turns back to control center by public network, contributes to the optimization of road traffic.
3) automatic monitoring freeway traffic flow amount, road the key foundation data such as rate, type of vehicle, Vehicle Speed can be accounted for.These basic datas are wirelessly sent to the access point (AP) in roadside, then are sent to remote server or the traffic control center of far-end by wired or wireless mode by access point.
Accompanying drawing explanation
Fig. 1 is sensor node architecture figure of the present invention;
Fig. 2 is the terrestrial magnetic field magnetic line of force change schematic diagram that vehicle of the present invention causes;
Fig. 3 is terrestrial magnetic field of the present invention detection signal and threshold values;
Fig. 4 is access point architecture figure of the present invention;
Fig. 5 is sensor node workflow of the present invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
Embodiment 1: parking lot, garage etc. are stopped and applies, need to install a sensor node in centre position, garage, detect according to the change in magnetic field under the presence or absence different conditions of car amount.The installation of access point is generally positioned in the air, on optional electric pole and street lamp pole, guarantees that the antenna footprint of access point can comprise whole sensor nodes.
This system can provide parking position status information in real time, road parking stall uses information, guides driver to search empty parking space, for driver saves time, reduces for want of parking information and situation that the parking stall difficulty that causes is looked for.Greatly alleviate urban traffic blocking situation, decrease road and take, reduce emission from vehicles and noise, improve the parking stall service efficiency in parking lot.Meanwhile, adopt the parking stall management of intensification system, toll administration, also effectively can change the situation of parking lot fee collection management confusion.
Main function of system:
accurate parking stall measure
wireless Data Transmission
real-time parking space state upgrades
empty vehicle parking position of parking lot real-time release
parking guides
region parking guidance
parking stall makes a reservation for
parking stall is inquired about
parking information is issued (website orientation, inform by short message, car-mounted terminal are reminded)
parking charge manages
intercity parking lot network management
parking stall uses record statistics
equipment failure, alarm management
parking charge manages.
Utilize geomagnetic sensor and wireless technology to realize the detection of information of vehicles, comprise the information such as the presence or absence of vehicle, the speed of a motor vehicle.This system comprises two parts: one is used to the sensor node detecting information of vehicles, this sensor node is embedded in underground, two are used to the information that receiving sensor node sends over, and carry out analyzing and processing, report the access point of background server, the communication mode between described access point and sensor node adopts wireless mode to realize; Meanwhile, an access point can communicate to multiple sensor node simultaneously, and the frequency of operation that Radio Communication adopts can be the conventional free frequency range such as 433MHz, 900MHz, 2.4GHz and 5.8GHz.Communication mode between described sensor node and access point adopts TDMA mode to realize, communication between each sensor node and access point takies a time slot, the data protocol according to a preconcerted arrangement of data communication between the two carries out, and the distribution of time slot and access point carry out controlling and distribute.
As shown in Figure 1, sensor node comprises geomagnetic sensor, control and treatment circuit (containing analog to digital conversion circuit), RF transmit-receive circuit, antenna and a few bulk of power circuit, described geomagnetic sensor connects control and treatment circuit, described control and treatment circuit connects RF transmit-receive circuit, and described antenna is connected on RF transmit-receive circuit; Described power circuit completes the function of supplying power of whole node, due in outdoor environment application, adopts powered battery mode, and the selection of battery capacity needs to consider the factors such as the employing frequency of frequency data communication between sensor node and access point, sensor.
Geomagnetic sensor adopts terrestrial magnetic field, the solid-state version sensor of anisotropy (AMR), the presence or absence of eternal detection vehicle, or the change that different motion state causes geomagnetic field disturbance, as adopted HMC104x and the HMC105x series of honeywell, the terrestrial magnetic field magnetic line of force change typically caused by vehicle as shown in Figure 2.Thus can the detection data that obtain of base area Magnetic Sensor, the response threshold of setting vehicle judges the status information of vehicle, as shown in Figure 3, wherein event detection threshold values, optimal design-aside can be carried out according to actual use occasion without event monitoring threshold values and event retention time three parameters, thus improve monitoring reliability.Antenna is used for the radio communication between access point, because sensor node is embedded in underground, considers the relative complex of surrounding environment, and the antenna of sensor side adopts ceramic antenna to realize, for improving the antijamming capability of antenna.RF transmit-receive circuit completes modulation to baseband signal, demodulation, the function such as amplification and filtering, consider the radio communication with incoming end, simultaneously because frequency of operation is in free band, there is a large amount of co-channel interference signals, RF transmit-receive circuit can select the chip of ready-made band wireless communication protocol, as selected the chip (CC2420 etc. of TI) supporting ZigBee technology.Control and treatment circuit for realizing the control of the work schedule to whole sensor, and controls the employing of analog to digital conversion circuit realization to the signal of geomagnetic sensor.Sensor node end only carries out simple pre-service to the data adopted, thus not high to the performance requirement of control and treatment circuit, and MSP430 single-chip microcomputer can be adopted to complete.Power circuit completes the function of supplying power of whole node.Due in outdoor environment application, adopt powered battery mode.The selection of battery capacity needs to consider the factors such as the employing frequency of frequency data communication between sensor node and access point, sensor.Sensor node finishes the work flow process as shown in Figure 5.
As shown in Figure 4, access point for receive and processes sensor node send over data, sensor node carried out to timing synchronization and control and to communicate with background service and to carry out the work such as data report; Whole access point comprises antenna, RF transmit-receive circuit, central processing unit, storage element and network communication unit, and described network communication unit realizes the access port of access point to public network, and simultaneously the whole access point mode adopting POE to power of powering realizes.Process owing to needing the sampled data of coming to sensor node and analyze, and simultaneously parallelly to communicate with backstage, therefore access point adopts the central processing unit (cpu) that performance is stronger to realize, and is equipped with external memory storage, and transplants real time operating system.Adopt in native system and transplant real-time Linux system for central processing unit, RF transmit-receive circuit and sensor node match, identical chip can be selected to realize, antenna on access point is different from antenna on sensor node, access point needs to communicate with multiple sensor node type in real time, in gain, directional diagram and polarization characteristic, have higher requirement.
Embodiment 2: for road application, sensor node is embedded in track central authorities, buries 2 sensor nodes before and after on each track, successively can be calculated the speed of vehicle according to vehicle by the mistiming of these two sensor nodes.Meanwhile, through adding up vehicle flowrate and the jam situation that can analyze this road for a long time.For improving the reliability detected, a sensor node can be additionally installed on track before two sensors and do advanced detection.According to different road conditions such as city, rural area and high speeds, before and after between two sensor nodes, the response family of power and influence of the Distance geometry sensor of difference needs to arrange respectively.
The basic traffic datas such as vehicle flowrate, the speed of a motor vehicle, lane occupancy ratio are gathered by the geomagnetic sensor be arranged in the middle of track, by the wireless access point uploading to roadside, access point passes to the traffic control center of neighbouring traffic controller or far-end again by the mode of wired (or wireless).
Replace existing ground induction coil embedding geomagnetic sensor coil before the lay-by of intersection, urban district, in conjunction with existing traffic-control device whistle control system and video monitoring system, can Real-time Collection, monitoring, capture machine motor-car make a dash across the red light, solid line lane changes etc. are act of violating regulations in violation of rules and regulations, and provides Real-time Road congestion information.During when red, utilize geomagnetic sensor to monitor, respond to existence (passing through) information of vehicle near lay-by or zebra stripes, start video camera and capture.
The magnetic field of the earth is constant substantially within several kilometers, but large-scale ferromagnetic object can produce huge disturbance to magnetic field of the earth, geomagnetic sensor can tell the change in magnetic field of the earth 1/6000th, and when vehicle by time will reach the part of absolute force to the impact of earth magnetism, therefore utilize geomagnetic sensor to carry out detection vehicle, there is high sensitivity.Compared with existing telefault, it also tool have the following advantages:
1) size is little, easy for installation, Lane Closed shortest time during construction.
Size is about 10cm × 6cm, and embedded road surface is installed, and with core drill, only can need install less than the time of 10 minutes.
2) to road machine damage degree low (a few mechanical destruction).
Without the need to kerf cutting, without the need to electric wire or introducing wiring.
3) micro power consumption, battery long (reaching 10 years)
4) sampling precision degree, reliability
5) addressable, configurable, firmware can radio upgrade.
This product is compared with other acquisition technique product prices existing, and be only equivalent to about 1/3 of other collection product prices, cost is low.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1. the intelligent radio vehicle detecting system based on geomagnetic sensor, it is characterized in that: comprise two parts: one is used to detect the sensor node of information of vehicles, this sensor node is embedded in underground, two are used to the information that receiving sensor node sends over, and carry out analyzing and processing, report the access point of background server, the communication mode between described access point and sensor node adopts wireless communication mode to realize; Meanwhile, an access point can communicate to multiple sensor node simultaneously.
2. the intelligent radio vehicle detecting system based on geomagnetic sensor according to claim 1, is characterized in that: the frequency of operation that described radio communication adopts can be the conventional free frequency range such as 433MHz, 900MHz, 2.4GHz and 5.8GHz.
3. the intelligent radio vehicle detecting system based on geomagnetic sensor according to claim 1, it is characterized in that: the communication mode between described sensor node and access point adopts TDMA mode to realize, communication between each sensor node and access point takies a time slot, the data protocol according to a preconcerted arrangement of data communication between the two carries out, and the distribution of time slot and access point carry out controlling and distribute.
4. the intelligent radio vehicle detecting system based on geomagnetic sensor according to claim 1, it is characterized in that: described sensor node comprises a few bulk of geomagnetic sensor, control and treatment circuit, RF transmit-receive circuit, antenna and power circuit, described geomagnetic sensor connects control and treatment circuit, described control and treatment circuit connects RF transmit-receive circuit, and described antenna is connected on RF transmit-receive circuit; Described power circuit completes the function of supplying power of whole node;
Described geomagnetic sensor adopts anisotropic terrestrial magnetic field, solid-state version sensor, forever detects the presence or absence of vehicle, or the change that different motion state causes geomagnetic field disturbance; Described antenna is used for the radio communication between access point, described RF transmit-receive circuit completes modulation to baseband signal, demodulation, the function such as amplification and filtering, described control and treatment circuit for realizing the control of the work schedule to whole sensor, and controls the employing of analog to digital conversion circuit realization to the signal of geomagnetic sensor;
Described access point for receive and processes sensor node send over data, sensor node carried out to timing synchronization and control and communicates with background service and carry out data and report work; Whole access point comprises antenna, RF transmit-receive circuit, central processing unit, storage element and network communication unit, and described network communication unit realizes the access port of access point to public network, and simultaneously the whole access point mode adopting POE to power of powering realizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510279534.7A CN104900067A (en) | 2015-05-28 | 2015-05-28 | Intelligent wireless vehicle detection system based on geomagnetic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510279534.7A CN104900067A (en) | 2015-05-28 | 2015-05-28 | Intelligent wireless vehicle detection system based on geomagnetic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104900067A true CN104900067A (en) | 2015-09-09 |
Family
ID=54032707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510279534.7A Pending CN104900067A (en) | 2015-05-28 | 2015-05-28 | Intelligent wireless vehicle detection system based on geomagnetic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104900067A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106600980A (en) * | 2017-02-13 | 2017-04-26 | 广州市公路勘察设计有限公司 | Traffic flow detection system |
| CN106781533A (en) * | 2016-12-29 | 2017-05-31 | 紫光捷通科技股份有限公司 | A kind of traffic intelligent detecting system for intersection |
| CN106971539A (en) * | 2017-04-27 | 2017-07-21 | 上海博历机械科技有限公司 | A kind of information of vehicles obtains comprehensive vehicle detecting system |
| CN107507427A (en) * | 2017-10-12 | 2017-12-22 | 山东纳普电子科技有限公司 | A kind of TDMA wireless geomagnetisms wagon detector |
| CN107978159A (en) * | 2016-10-25 | 2018-05-01 | 华东交通大学 | Vehicle on highway velocity-measuring system |
| CN108387239A (en) * | 2017-02-02 | 2018-08-10 | 罗伯特·博世有限公司 | Method for integrating dynamic objects into digital maps of highly automated vehicles |
| CN109003458A (en) * | 2018-08-09 | 2018-12-14 | 河海大学常州校区 | Crossing vehicle violation based on three axis geomagnetic sensors monitors system and method |
| CN109523789A (en) * | 2018-12-05 | 2019-03-26 | 郑州轻工业学院 | The electric vehicle road occupying managing and control system and crossing management-control method coordinated based on bus or train route interaction |
| CN116778724A (en) * | 2023-07-14 | 2023-09-19 | 浙江海康智联科技有限公司 | Array type magnetic flux vehicle detection system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203480686U (en) * | 2010-07-29 | 2014-03-12 | 先思网络股份有限公司 | Device working together with sensor nodes and sensor clusters of sensor nodes |
| CN104200672A (en) * | 2014-08-19 | 2014-12-10 | 北方工业大学 | Traffic intersection queuing length detection method and system based on multi-sensor fusion |
-
2015
- 2015-05-28 CN CN201510279534.7A patent/CN104900067A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203480686U (en) * | 2010-07-29 | 2014-03-12 | 先思网络股份有限公司 | Device working together with sensor nodes and sensor clusters of sensor nodes |
| CN104200672A (en) * | 2014-08-19 | 2014-12-10 | 北方工业大学 | Traffic intersection queuing length detection method and system based on multi-sensor fusion |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107978159A (en) * | 2016-10-25 | 2018-05-01 | 华东交通大学 | Vehicle on highway velocity-measuring system |
| CN106781533A (en) * | 2016-12-29 | 2017-05-31 | 紫光捷通科技股份有限公司 | A kind of traffic intelligent detecting system for intersection |
| CN108387239A (en) * | 2017-02-02 | 2018-08-10 | 罗伯特·博世有限公司 | Method for integrating dynamic objects into digital maps of highly automated vehicles |
| CN108387239B (en) * | 2017-02-02 | 2023-10-03 | 罗伯特·博世有限公司 | Methods for integrating dynamic objects into digital maps for highly automated vehicles |
| CN106600980A (en) * | 2017-02-13 | 2017-04-26 | 广州市公路勘察设计有限公司 | Traffic flow detection system |
| CN106971539A (en) * | 2017-04-27 | 2017-07-21 | 上海博历机械科技有限公司 | A kind of information of vehicles obtains comprehensive vehicle detecting system |
| CN107507427A (en) * | 2017-10-12 | 2017-12-22 | 山东纳普电子科技有限公司 | A kind of TDMA wireless geomagnetisms wagon detector |
| CN109003458A (en) * | 2018-08-09 | 2018-12-14 | 河海大学常州校区 | Crossing vehicle violation based on three axis geomagnetic sensors monitors system and method |
| CN109003458B (en) * | 2018-08-09 | 2021-08-10 | 河海大学常州校区 | Intersection vehicle violation monitoring system and method based on triaxial geomagnetic sensor |
| CN109523789A (en) * | 2018-12-05 | 2019-03-26 | 郑州轻工业学院 | The electric vehicle road occupying managing and control system and crossing management-control method coordinated based on bus or train route interaction |
| CN109523789B (en) * | 2018-12-05 | 2021-04-09 | 郑州轻工业学院 | Electric vehicle lane occupation management and control system and road junction management and control method based on vehicle-road interaction coordination |
| CN116778724A (en) * | 2023-07-14 | 2023-09-19 | 浙江海康智联科技有限公司 | Array type magnetic flux vehicle detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104900067A (en) | Intelligent wireless vehicle detection system based on geomagnetic sensor | |
| CN104900060A (en) | Intelligent management monitoring system for convenient parking in urban areas | |
| CN104299415B (en) | Based on distributed traffic condition detecting system and the method thereof of Bluetooth technology | |
| CN102637365B (en) | System and method for realizing urban traffic intelligence by utilizing i-RFID (interactive-radio frequency identification) | |
| CN105046985B (en) | The traffic control system of major trunk roads system-wide section based on big data | |
| CN102231232B (en) | Management, induction and control system of urban traffic | |
| CN103236166B (en) | Method for recognizing vehicle violation behaviors with satellite positioning technology | |
| CN203260191U (en) | Traffic monitoring and management system | |
| CN108711309A (en) | Wisdom parking guidance system and method based on internet Yu narrowband Internet of Things | |
| CN102496273B (en) | City traffic road condition collection method and system thereof | |
| CN101840636A (en) | Real-time traffic flow monitoring and early warning induction management system for highway and monitoring method | |
| CN102930738A (en) | Vehicle positioning and traffic flow detection system and method | |
| CN102324182A (en) | Traffic road information detection system based on cellular network and detection method thereof | |
| CN104091443A (en) | Method and system for calculating traffic congestion degree based on radio frequency identification | |
| CN102722987A (en) | Roadside parking space detection method | |
| CN202404768U (en) | Roadside parking space detecting system | |
| CN103345850A (en) | Method for improving utilization rate of parking spaces by means of wireless sensor network | |
| CN104881996A (en) | Real-time traffic data collecting and analyzing system based on Bluetooth technology | |
| CN202472944U (en) | Urban traffic information acquisition and processing system based on integration of data of multiple sensors | |
| CN202996022U (en) | Traffic condition sensing system employing Bluetooth technology | |
| CN104424800A (en) | Floating car traffic information acquiring method and system based on electronic toll collection radio frequency identification | |
| CN201465307U (en) | All-weather traffic management system | |
| CN207946943U (en) | An intelligent parking guidance system | |
| CN109935105A (en) | Geomagnetic parking space detection system and method based on NB-iot | |
| CN205788801U (en) | A kind of wisdom parking parking lot information data acquisition equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150909 |
|
| RJ01 | Rejection of invention patent application after publication |