CN101226690A - Wireless geomagnetism type vehicle detecting system - Google Patents

Wireless geomagnetism type vehicle detecting system Download PDF

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Publication number
CN101226690A
CN101226690A CNA2007100365049A CN200710036504A CN101226690A CN 101226690 A CN101226690 A CN 101226690A CN A2007100365049 A CNA2007100365049 A CN A2007100365049A CN 200710036504 A CN200710036504 A CN 200710036504A CN 101226690 A CN101226690 A CN 101226690A
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CN
China
Prior art keywords
wireless
module
type
type vehicle
microprocessor
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CNA2007100365049A
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Chinese (zh)
Inventor
杜豫川
孙立军
牛岗
王政华
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同济大学
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Application filed by 同济大学 filed Critical 同济大学
Priority to CNA2007100365049A priority Critical patent/CN101226690A/en
Publication of CN101226690A publication Critical patent/CN101226690A/en

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Abstract

The invention relates to a vehicle detecting system of wireless geomagnetic type, which is composed of a point-type geomagnetic-type vehicle sensing device of and a roadside wireless receiving device. The point-type geomagnetic-type vehicle sensing device comprises a vehicle sensor, an operational amplifier, a microprocessor, a wireless data receiving and emission module and a control switch module of power supply and power consumption. The roadside wireless receiving device is composed of a wireless data receiving and emission and information processing module, an information storage module, a wireless communication module and power supply. The invention has the advantages that the invention is not limited by road surface conditions and installation places, and is high in integration degree, stable in function, high in reliability, extensive in application, further, the invention not only can detect traffic flow parameters (flow rate, speed, occupancy and model) in automatic traffic system, but also can detect a plurality of traffic infringements, such as vehicles running a red light, imposing lines, driving the reverse direction, speed measurement and the like in the electron police system.

Description

A kind of wireless geomagnetism type vehicle detecting system

Technical field

The present invention relates to the correlative technology field of intelligent transportation, particularly a kind of wireless geomagnetism type vehicle detecting system.

Background technology

The collection of transport information be the most basic in the intelligent transportation system, also be one of the link of most critical.Efficiently, sensitive, the DETECTION OF TRAFFIC PARAMETERS system is first link of various forms of ITS system successful operation reliably.At present, transport information detection technique commonly used both at home and abroad mainly is divided into two big classes: road surfacing formula checkout equipment and non-intrusion type checkout equipment.Road surfacing formula checkout equipment comprises inductive coil sensor, magnetometric sensor, inductance sensor, pressure transducer etc.; The non-intrusion type checkout equipment comprises infrared eye, ultrasonic detector, microwave detector, video detecting device etc.

Wherein, the inductive coil sensor of road surfacing formula is that present range of application is the most extensive, the DETECTION OF TRAFFIC PARAMETERS equipment that market share is the highest, and its global market share surpasses 65%.The core of this technology is to utilize the energising square coil that is embedded in track central authorities to detect vehicle to pass through.When vehicle passed through on inductive coil, the inductance value of coil can change, and can reflect the existence of tested vehicle by the variation of measuring winding inductance quantity.

The inductive coil detecting sensor is used in a large number in China, but it has exposed a lot of deficiencies in using.At first, need in detecting the track, cut the road surface when inductive coil detecting sensor is installed,, also will bury long feeder line simultaneously underground inductive coil is linked to each other with the detecting sensor circuit in roadside so that fluting is buried inductive coil underground; When multilane detects, need on every track, bury inductive coil underground, when judging the travel direction of tested vehicle, needs also need to bury former and later two inductive coils underground in same track.The damage of these installment work road pavement is bigger, and long construction period is very big to traffic impact.Secondly, because the inductive coil detecting sensor will be rolled by vehicular traffic for a long time, and its intensity is less, and the inductive coil that is embedded in the track is fragile, often needs repairing, and the workload of daily servicing is big, expense is bigger.The 3rd, the inductive coil detecting sensor needs externally fed operation, and electric power etc. is had relatively high expectations.

Summary of the invention

The purpose of this invention is to provide a kind of wireless geomagnetism type vehicle detecting system, need not lay in this system applies ground circuit, bury large-area inductive coil underground, only need to install a point type geomagnetic type vehicle sensor and roadside radio receiver, the damage of installation road pavement that has solved traditional road surfacing formula checkout equipment is bigger, long construction period, big to traffic impact, and often need repairing, the workload of daily servicing is big, expense is bigger, and the problem that electric power supply etc. is had relatively high expectations.

For achieving the above object, the present invention has adopted following technical scheme:

A kind of wireless geomagnetism type vehicle detecting system is characterized in that:

Described system is made up of point type geomagnetic type vehicle sensing device and roadside radio receiver;

Described point type geomagnetic type vehicle sensing device comprises that vehicle sensors, operational amplifier, microprocessor, wireless data receive transmitter module, power supply and power consumption control switch module; Wherein, the signal output part of vehicle sensors is connected with the signal input part of operational amplifier, the signal output part of operational amplifier is connected with the A/D of microprocessor sampling input end, the data I/O of microprocessor is connected with the data I/O that wireless data receives transmitter module, microprocessor control signal output is connected with the signal input end of power consumption control switch module, the output terminal of power supply respectively with microprocessor, the power input that wireless data receives transmitter module and power consumption control switch module connects, and the Control of Voltage output terminal of power consumption control switch module is connected with the power input of vehicle sensors and operational amplifier respectively;

Described roadside radio receiver receives emission by wireless data and message processing module, information storage module, wireless communication module and power supply are formed; Wherein, wireless data receives emission and message processing module is communicated by letter by wireless mode with the wireless data reception transmitter module in the point type geomagnetic type vehicle sensing device, the signal output part that wireless data receives emission and message processing module is connected with the signal input part of information storage module and wireless communication module respectively, and the output terminal of power supply is connected with the power input of wireless data reception emission and message processing module, information storage module and wireless communication module respectively.

Because adopted above scheme, the beneficial effect that the present invention is possessed is:

1, easy to install.Vehicle sensors of the present invention only needs to bore cylindrical hole on the road surface of detecting the track in use, puts into the cylindrical structural sensor, and sealing and fixing gets final product work.By wireless telecommunications, need not to connect by the ground electric wire between vehicle sensors and the roadside radio receiver, construction is simple.

2, integrated degree height, stable performance, reliability height.It adopts the vehicle sensors 1 of integrated form physical field, the variation of physical field (electric field, magnetic field etc.) conversion journey electric signal, reaches the vehicle detection purpose.It is high to compare the inductive coil stability that the coil detecting sensor is embedded in the road, and therefore, it is subjected to environmental factor variable effect such as temperature little.

3, be difficult for impaired, but long-term work.The present invention only bores very little hole in track central authorities, be not subjected to the restriction of pavement conditions and infield, can not roll detecting sensor during normal vehicle operation, be different from the coil detecting sensor need vehicle from the coil by after just can detect vehicle, so the present invention is difficult for impaired, but long-term work.

4, of many uses, except that have with coil detecting sensor identical functions, also have the function that the coil detecting sensor does not possess.Only can judge the travel direction of vehicle, and can on a point, detect vehicle with the single unit vehicle detecting sensor; When a plurality of detecting sensors being installed in when using on the line, can constitute the line detection zone.Therefore, in electronic police system, can be used for the detection of multiple traffic offence behaviors such as vehicle makes a dash across the red light, line ball, reverse driving, velocity survey.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Embodiment

Below in conjunction with drawings and Examples the present invention is further described.

A kind of wireless geomagnetism type vehicle detecting system is made up of point type geomagnetic type vehicle sensing device and roadside radio receiver, as shown in Figure 1.Point type geomagnetic type vehicle sensor receives transmitter module 4, battery 5, power consumption control switch module 6 by vehicle sensors 1, operational amplifier 2, microprocessor 3, wireless data to be formed, and the roadside radio receiver is received by wireless data to be launched and message processing module 7, information storage module 8, CDMA communication module 9, accumulator 10 are formed.

Vehicle sensors 1 effect is that the variation of physical field (electric field, magnetic field etc.) is converted to electric signal, and 2 pairs of signals of this electric signal input operational amplifier amplify.Vehicle sensors 1 among the embodiment adopts commercially available HMC1052 type magnetoresistive transducer to make, and also can adopt contactless physical field sensor production.Operational amplifier 2 effect amplifying signals adopt commercially available LM358 amplifier integrated package to make.The principle of work of magnetoresistive transducer is: it is the magnetic induction sensor of integrated encapsulation, the magnetic field of the earth in very large range is constant, when ferromagnetic objects such as vehicle exist, the magnetic field that can cause vehicle periphery changes, magnetoresistive transducer can detect the variation in this magnetic field, and this changes of magnetic field converted to electric signal, and be input to operational amplifier 2 and amplify, reach the existence that detects vehicle and the purpose of variation.

The detection signal that the present invention amplifies through operational amplifier 2, sample into end 1 pin by its A/D that goes out end 3 pin input microprocessors 3, the effect of microprocessor 3 becomes digital signal to the analog signal conversion of sampling, simultaneously to object informations such as the travel direction that can obtain tested vehicle after the sampled signal data processing, holding times, wave form analysis by detection signal, differentiate vehicle information, and then calculate information such as vehicle commander, the speed of a motor vehicle.These detection signals receive transmitter module 4 data by its end 3 pin input wireless data of coming in and going out and go into end 1 pin.Wireless data receives transmitter module 4 and has the carrier wave measuring ability, sign in the emission data, work in accepting state earlier, only detect and just change into emission state transmission data after the electromagnetic signal that does not have same frequency exists, interference when avoiding a plurality of vehicle sensors 1 to work simultaneously, make stable performance, reliable operation, and data are sent to the wireless data receiver in roadside by the wireless transmission mode.Embodiment microprocessor 3 adopts the microprocessor of commercially available MSP430F1 121 type super low-power consumptions to make, and wireless data receives transmitter module 4 and adopts the integrated receiver/transmitter module making of commercially available nRF905.

Microprocessor 3 of the present invention is controlled out end 4 pin output control signal and is inputed to 6 controls of power consumption control switch module and go into end 3 pin, controlling it goes out to hold 2 pin output+V voltage sources to be switched on or switched off, 6 effects of power consumption control switch module are directly to control vehicle sensors 1 and operational amplifier 2 power supply switchings, make it be operated in the pulse condition that intermittently powers up, it is short to power up the working time, and power-off time is long, reduces electrical source consumption thereby reduce the working time.Battery 5 effects provide each parts operating voltage.In order to reduce power consumption, microprocessor 3 only moves when vehicle sensors 1 and operational amplifier 2 power up work, and the time be in dormant state in outage, wireless data receives 4 of transmitter modules and power up work when the emission data, just often be in the off-mode of little power consumption, total electrical source consumption is reduced greatly, and embodiment battery 5 adopts lithium battery to make, and its output+V voltage is+3.6V.Power consumption control switch module 6 adopts commercially available IRF7317 type electronic switch integrated package to make.Vehicle sensors 1 of the present invention, operational amplifier 2, microprocessor 3, wireless data receive transmitter module 4, battery 5, power consumption control switch module 6 each circuit block packoff in the cylindrical structural housing, embodiment adopts nylon material to be pressed into the circular cylindrical shell body structure, above circuit block is assemblied in the printed board of a block length bar shaped, then printed board is installed in 50 millimeters of the little diameters of size, highly is that sealing is assembled in 120 millimeters cylindrical housings.

Vehicle sensors 1 adopts commercially available HMC1052 type magnetoresistive transducer to make, and also can adopt contactless physical field sensor production.Operational amplifier 2 effect amplifying signals adopt commercially available LM358 amplifier integrated package to make.The principle of work of magnetoresistive transducer is: it is the magnetic induction sensor of integrated encapsulation, the magnetic field of the earth in very large range is constant, when ferromagnetic objects such as vehicle exist, the magnetic field that can cause vehicle periphery changes, magnetoresistive transducer can detect the variation in this magnetic field, and this changes of magnetic field converted to electric signal, and be input to operational amplifier 2 and amplify, reach the existence that detects vehicle and the purpose of variation.

Each circuit block integrating device of wireless data reception emission and message processing module 7, information storage module 8, CDMA communication module 9, accumulator 10 is in the square structure housing.Wireless data receives emission and message processing module 7 signals and goes out end 1 pin and go into information storage module 8 signals that end 1 pin is connected, wireless data receives emission and message processing module 7 signals go out to hold 1 pin and CDMA communication module 9 signals to go into to hold 1 pin to be connected; The power supply of accumulator 10 goes out power supply that end 1 pin receives emission and message processing module 7, information storage module 8, CDMA communication module 9 with wireless data respectively and goes into end 2 pin and connect.

Wireless data among the embodiment receives the microprocessor and the integrated receiver/transmitter module making of commercially available nRF905 of emission and the commercially available MSP430F1121 type super low-power consumption of message processing module 7 employings, but the point type geomagnetic sensor information of parallel processing 64 tunnel.Information storage module 8 adopts commercially available USB interface low-power consumption portable hard drive, and the storage space of 60G can be provided.CDMA communication module 9 adopts commercially available saroDTU6530p data communication transmission terminal, supports the IP/TCP agreement.Accumulator 10 adopts the output of 12V voltage.

The concise and to the point principle of work process of point type geomagnetic type vehicle sensor of the present invention is as follows: vehicle sensors 1 and operational amplifier 2 power supplys are logical, it is disconnected that it powers up the working time by 6 controls of power consumption control switch module, when vehicle sensors 1 work, microprocessor 3 is pressed some cycles and is set a timer, switch on power loss gauge tap module 6 then, make vehicle sensors 1 and operational amplifier 2 power up work, 3 pairs of operational amplifier 2 output signals of microprocessor are sampled, convert digital signal to, finish once sampling, preserve and detect data, microprocessor 3 turn-offs power consumption control switch module 6 then, and is in it except that other programs of timer work province's dotted state out of service.After microprocessor 3 setting-up times arrive, timer produces and interrupts making microprocessor 3 withdraw from province's dotted state, rerun routine, switch on power loss gauge tap module 6 once more, make vehicle sensors 1 and operational amplifier 2 work, after sampling, obtain one group of new magnetic field data, these data compare in last data, if data are identical, then the background magnetic field data of these data as the detection electricity, when new detection data and background magnetic field data not simultaneously, the size and the trend that change by comparing data, thus judge existence and the travel direction of removing vehicle, finish once sampling, repeat last process after the data processing once more, circulation is carried out successively.

Detecting automobile storage when also needing to send the detection data, microprocessor 3 can suspend data sampling, opens wireless data reception transmitter module 4 and works in accepting state, detects the carrier signal that whether has same frequency, if have, then wait for and continue and detect with carrier signal existence frequently; When not having the same frequency carrier signal, microprocessor 3 control wireless datas receive transmitter module 4 the testing result data are sent, and the roadside receiver reception testing result by other reenters in the sense cycle circulation then.

During use, detecting track central authorities brill cylindrical hole, put into the vehicle detecting sensor device, sealing and fixing gets final product work, need not debugging, receives by wireless mode and detects data, reaches the purpose of vehicle detection.

Radio receiver concise and to the point principle of work process in roadside of the present invention is as follows: wireless data receives after emission and the message processing module 7 real-time reception information in the writing information memory module 8; At the appointed time or after the specified quantity, wireless data receives emission and message processing module 7 carries out the statistic of classification of the type of vehicle quantity and the speed of a motor vehicle, sends CDMA communication module 9 to, finishes transmission in real time.

Claims (10)

1. wireless geomagnetism type vehicle detecting system, it is characterized in that: described system is made up of point type geomagnetic type vehicle sensing device and roadside radio receiver;
Described point type geomagnetic type vehicle sensing device comprises that vehicle sensors, operational amplifier, microprocessor, wireless data receive transmitter module, power supply and power consumption control switch module; Wherein, the signal output part of vehicle sensors is connected with the signal input part of operational amplifier, the signal output part of operational amplifier is connected with the A/D of microprocessor sampling input end, the data I/O of microprocessor is connected with the data I/O that wireless data receives transmitter module, microprocessor control signal output is connected with the signal input end of power consumption control switch module, the output terminal of power supply respectively with microprocessor, the power input that wireless data receives transmitter module and power consumption control switch module connects, and the Control of Voltage output terminal of power consumption control switch module is connected with the power input of vehicle sensors and operational amplifier respectively;
Described roadside radio receiver receives emission by wireless data and message processing module, information storage module, wireless communication module and power supply are formed; Wherein, wireless data receives emission and message processing module is communicated by letter by wireless mode with the wireless data reception transmitter module in the point type geomagnetic type vehicle sensing device, the signal output part that wireless data receives emission and message processing module is connected with the signal input part of information storage module and wireless communication module respectively, and the output terminal of power supply is connected with the power input of wireless data reception emission and message processing module, information storage module and wireless communication module respectively.
2. a kind of wireless geomagnetism type vehicle detecting system according to claim 1 is characterized in that: the vehicle sensors in the described point type geomagnetic type vehicle sensing device is a HMC1052 type magnetoresistive transducer.
3. a kind of wireless geomagnetism type vehicle detecting system according to claim 1 is characterized in that: the operational amplifier in the described point type geomagnetic type vehicle sensing device is the LM358 operational amplifier.
4. a kind of wireless geomagnetism type vehicle detecting system according to claim 1 is characterized in that: the microprocessor in the described point type geomagnetic type vehicle sensing device is a MSP430F1121 type microprocessor.
5. a kind of wireless geomagnetism type vehicle detecting system according to claim 1 is characterized in that: it is the integrated receiver/transmitter module of nRF905 that the wireless data in the described point type geomagnetic type vehicle sensing device receives transmitter module.
6. a kind of wireless geomagnetism type vehicle detecting system according to claim 1 is characterized in that: the power consumption control switch module in the described point type geomagnetic type vehicle sensing device is made of IRF7317 type electronic switch integrated package.
7. a kind of wireless geomagnetism type vehicle detecting system according to claim 1, it is characterized in that: the wireless communication module in the radio receiver of described roadside is the CDMA communication module, constitute by saroDTU6530p data communication transmission terminal, realize communicating by letter of native system and other equipment by cdma network.
8. a kind of wireless geomagnetism type vehicle detecting system according to claim 1 is characterized in that: the wireless data in the radio receiver of described roadside receives emission and message processing module is made of integrated receiver/transmitter module of nRF905 and MSP430F1121 type microprocessor.
9. a kind of wireless geomagnetism type vehicle detecting system according to claim 1 is characterized in that: the information storage module in the radio receiver of described roadside is the portable hard drive that has USB interface.
10. a kind of wireless geomagnetism type vehicle detecting system according to claim 1 is characterized in that: the power supply in the described point type geomagnetic type vehicle sensing device is a lithium battery, and the power supply in the radio receiver of roadside is an accumulator.
CNA2007100365049A 2007-01-16 2007-01-16 Wireless geomagnetism type vehicle detecting system CN101226690A (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101807350A (en) * 2010-03-24 2010-08-18 天津信电科技发展有限公司 Method for improving accuracy of geomagnetic parking stall detector
CN101908278A (en) * 2010-08-09 2010-12-08 北京交通发展研究中心 Wireless magnetic induction intensity vehicle detection method and device
CN102147972A (en) * 2010-02-09 2011-08-10 上海秀派电子科技有限公司 Detecting device for wireless geomagnetic vehicle and installation method of detecting device
CN102496287A (en) * 2011-12-22 2012-06-13 曹全 Weak magnetic digital sensing vehicle detection system and detection method employed by same
CN102779281A (en) * 2012-06-25 2012-11-14 同济大学 Vehicle type identification method based on support vector machine and used for earth inductor
CN103247180A (en) * 2013-05-10 2013-08-14 秦旭彦 Micropower wireless geomagnetism traffic flow detector
CN103456178A (en) * 2013-09-03 2013-12-18 中国船舶重工集团公司第七一〇研究所 Road vehicle speed measuring system
CN103456177A (en) * 2013-09-03 2013-12-18 中国船舶重工集团公司第七一〇研究所 Vehicle red light running judgment system
CN103680144A (en) * 2013-12-03 2014-03-26 四川交通职业技术学院 Highway safety distance checking system and detection method thereof
CN103942965A (en) * 2014-04-30 2014-07-23 杭州百控科技有限公司 Geomagnetic vehicle detector
CN104391234A (en) * 2014-12-04 2015-03-04 国家电网公司 Intermittent servicing partial discharge online monitoring system
CN105023440A (en) * 2015-07-01 2015-11-04 苏州双木电子科技有限公司 Intelligent parking lot system based on terrestrial magnetism detection
CN105448106A (en) * 2015-12-03 2016-03-30 哈尔滨工业大学 Vehicle detection device based on geomagnetic sensor array
CN105825685A (en) * 2016-04-20 2016-08-03 周欣 Magnetoresistive sensor network-based vehicle converse running wireless detection and intelligent control system
CN105825682A (en) * 2014-04-30 2016-08-03 杭州百控科技有限公司 Geomagnetic vehicle detector
CN107563521A (en) * 2017-07-27 2018-01-09 深圳市盛路物联通讯技术有限公司 A kind of method for managing security and terminal device
CN109935086A (en) * 2019-05-16 2019-06-25 常州工程职业技术学院 A kind of Internet of Things logistics electronic information acquisition device

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102147972A (en) * 2010-02-09 2011-08-10 上海秀派电子科技有限公司 Detecting device for wireless geomagnetic vehicle and installation method of detecting device
CN101807350B (en) * 2010-03-24 2012-01-18 天津信电科技发展有限公司 Method for improving accuracy of geomagnetic parking stall detector
CN101807350A (en) * 2010-03-24 2010-08-18 天津信电科技发展有限公司 Method for improving accuracy of geomagnetic parking stall detector
CN101908278A (en) * 2010-08-09 2010-12-08 北京交通发展研究中心 Wireless magnetic induction intensity vehicle detection method and device
CN101908278B (en) * 2010-08-09 2013-12-18 北京交通发展研究中心 Wireless magnetic induction intensity vehicle detection method and device
CN102496287A (en) * 2011-12-22 2012-06-13 曹全 Weak magnetic digital sensing vehicle detection system and detection method employed by same
CN102496287B (en) * 2011-12-22 2014-03-19 曹全 Weak magnetic digital sensing vehicle detection system and detection method employed by same
CN102779281B (en) * 2012-06-25 2014-10-22 同济大学 Vehicle type identification method based on support vector machine and used for earth inductor
CN102779281A (en) * 2012-06-25 2012-11-14 同济大学 Vehicle type identification method based on support vector machine and used for earth inductor
CN103247180A (en) * 2013-05-10 2013-08-14 秦旭彦 Micropower wireless geomagnetism traffic flow detector
CN103456178A (en) * 2013-09-03 2013-12-18 中国船舶重工集团公司第七一〇研究所 Road vehicle speed measuring system
CN103456177A (en) * 2013-09-03 2013-12-18 中国船舶重工集团公司第七一〇研究所 Vehicle red light running judgment system
CN103680144A (en) * 2013-12-03 2014-03-26 四川交通职业技术学院 Highway safety distance checking system and detection method thereof
CN103942965A (en) * 2014-04-30 2014-07-23 杭州百控科技有限公司 Geomagnetic vehicle detector
CN105825682B (en) * 2014-04-30 2018-04-20 杭州百控科技有限公司 Earth magnetism vehicle detection apparatus
CN103942965B (en) * 2014-04-30 2016-07-06 杭州百控科技有限公司 Earth magnetism wagon detector
CN105825682A (en) * 2014-04-30 2016-08-03 杭州百控科技有限公司 Geomagnetic vehicle detector
CN104391234A (en) * 2014-12-04 2015-03-04 国家电网公司 Intermittent servicing partial discharge online monitoring system
CN105023440A (en) * 2015-07-01 2015-11-04 苏州双木电子科技有限公司 Intelligent parking lot system based on terrestrial magnetism detection
CN105448106A (en) * 2015-12-03 2016-03-30 哈尔滨工业大学 Vehicle detection device based on geomagnetic sensor array
CN105825685A (en) * 2016-04-20 2016-08-03 周欣 Magnetoresistive sensor network-based vehicle converse running wireless detection and intelligent control system
CN107563521A (en) * 2017-07-27 2018-01-09 深圳市盛路物联通讯技术有限公司 A kind of method for managing security and terminal device
CN109935086A (en) * 2019-05-16 2019-06-25 常州工程职业技术学院 A kind of Internet of Things logistics electronic information acquisition device

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