CN102436762A - Highway intelligent aided guidance system based on GPRS (General Packet Radio Service)/CDMA (Code Division Multiple Access) wireless network and control method thereof - Google Patents

Highway intelligent aided guidance system based on GPRS (General Packet Radio Service)/CDMA (Code Division Multiple Access) wireless network and control method thereof Download PDF

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CN102436762A
CN102436762A CN2011102795387A CN201110279538A CN102436762A CN 102436762 A CN102436762 A CN 102436762A CN 2011102795387 A CN2011102795387 A CN 2011102795387A CN 201110279538 A CN201110279538 A CN 201110279538A CN 102436762 A CN102436762 A CN 102436762A
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gprs
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wireless network
variable speed
cdma
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CN102436762B (en
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郑增威
陈垣毅
陈丹
蔡建平
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Zhejiang University City College ZUCC
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Zhejiang University City College ZUCC
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Abstract

The invention relates to a highway intelligent aided guidance system based on a GPRS (General Packet Radio Service)/CDMA (Code Division Multiple Access) wireless network and a control method thereof. The highway intelligent aided guidance system based on the GPRS/CDMA wireless network is characterized by comprising a wireless network composed of a traffic information board node, a variable speed-limiting signboard node, a visibility detection node and a background monitoring center, wherein the background monitoring center is connected with the GPRS/CDMA wireless network, initializes settings of the traffic information board node, the variable speed-limiting signboard node and the visibility detection node and monitors the working state of the nodes; meanwhile the background monitoring center formulates an overall guidance scheme according to road condition parameters sent by the visibility detection node and guidance content fed back by the traffic information board node and the variable speed-limiting signboard node, and sends guidance adjusting commands to the corresponding traffic information board node and variable speed-limiting signboard node through the GPRS/CDMA wireless network; and the background monitoring center informs a highway department to take emergency measures such as road closure and the like under a particularly severe road condition.

Description

A kind of express highway intelligent helper-inducer system and control method thereof based on the GPRS/CDMA wireless network
Technical field
The present invention relates to a kind of express highway intelligent helper-inducer electronic installation; Specifically, relate to a kind of express highway intelligent helper-inducer system and control method thereof that realizes highway vehicle safe passing under severe weather conditions based on the GPRS/CDMA wireless network.
Background technology
In recent years, along with China's constant development of economy, expressway construction also steps into the fast-developing phase.According to statistics, to the Eleventh Five-Year Plan end of term, China's highway total kilometrage has developed into 7.4 ten thousand kilometers, occupies the second place of the world.Country not only needs planning, designs and build well highway; And more need utilize modern information technology means scientific management highway; To give full play to the advantage of highway " fast speed, high-level efficiency, save time, high benefit ", excavate its huge passenger and freight transportation potentiality to obtain remarkable economic efficiency and social benefit.But the generation of phenomenons such as traffic hazard that causes because of adverse weather and traffic congestion is made a discount to its advantage undoubtedly, greatly reduces its due economic benefit and social benefit.The wagon flow of highway has that speed is fast, flow reaches characteristics such as totally-enclosed greatly, requires vehicle arbitrarily to slow down and to stop, so in a single day highway runs into inclement weathers such as sleet, hail and thick fog; Just be easy to occurrence of traffic accident; For example: on May 24th, 2009, because dense fog influence, more than 40 a chain of traffic accident takes place night on the 24th in the highway of Wuhu, Anhui Province to Xuancheng---overgrown with weeds a surname's highway at least; Cause tens people injured, 11 people are dead; In morning on November 5th, 2010, elder brother's highway 804KM place, Shanghai projection group mist causes the same time that 7 rear-end collision accidents take place respectively, and 19 automobile damages are serious, and 19 people are dead, and 16 people are injured or the like.
At present, external prevention mainly contains following several types because of the measure that inclement weathers such as sleet, hail and thick fog cause traffic accidents: light is induced, the current scheme based on GPS and ZigBee local area network technology, utilization figure image intensifying road scene and lay photoconductive tube etc. at the critical facility place.Current scheme based on light is induced can be guided vehicle ' under certain mist condition condition, but when the mist condition was comparatively serious, vehicle still can't obtain the marginal information of road; Scheme based on GPS and ZigBee local area network technology depends on the GPS precision, and high accurate GPS embarrasses the general vehicle configuration; At mist hour, the sharpness that utilization figure image intensifying mode improves road image can instruct driving, but when thick fog took place, the mode of scheming image intensifying can't recover road scene preferably; Photoconductive tube not only costs an arm and a leg, and because need set up AC power, frequent change light fixture and too high and can't popularize to the accidental destruction maintenance cost.Current China freeway management unit cooperates freeway traffic road administration department also to do some significant work in this respect, has obtained effect preferably.Such as: according to factors such as highway condition of road surface, surrounding enviroment speed limitation board is set; And for example: laying optical fiber in the expressway construction process; With point-to-point or be that the vehicle driver issues some guided bones or warning information on the transport information board of both sides of highway to the multiple spot form a bit, certain positive role appears playing in generation or traffic congestion phenomenon to avoiding traffic accident through optical fiber in rear control center.Yet; In case change in weather, visibility significantly descends, and rear control center often is difficult in time find and issues some guided bones or warning information; It is not enough or pre-warning time is not enough to cause information to propagate real-time; At this moment the vehicle driver often can not in time make correct judgement or processing, causes easy initiation traffic hazard, causes congestion in road.With abroad compare, China is not at present also to the highway measure that vehicle pass-through is effectively induced under inclement weathers such as sleet, hail and thick fog.Add up according to interrelated data; The traffic hazard sum and the mortality ratio of general developed country highway have only 1/3 to 1/2 of common road; And the accident rate of China's highway and mortality ratio be all greater than common road, and the accident that wherein causes because of boisterous influences such as mists accounts for nearly 1/4 of total accident.
In following economic development; Nettedization, systematization, incorporate freeway net infrastructure will progressively form, and intercity passenger and freight transportation demand will further strengthen, as the freeway net of bearing the main transport task of system; In case generation major traffic accidents; Will influence whole regional traffic operation, economic development produced material impact, so the effect of traffic management technology in contingency management work is outstanding all the more.On the basis of rule that inclement weathers such as disclosing and grasp fog pollution on the highway takes place and characteristics; Emphasis is taked certain measure of advance notice in advance to inclement weather multi-happening sections such as sleet, hail and thick fogs; Can further improve the security of highway operation, reduce the generation of traffic hazard.Systematic research of express highway intelligent helper-inducer and application help to reduce the accident rate on the highway under the inclement weather; Vehicle supervision department is in time carried out the traffic management and control extend efficient help, have important reality and economic implications reducing social economy and masses' life and property loss; This systematic research simultaneously also is an important component part of traffic control system, helps to realize the modernization of China's traffic administration.
Summary of the invention
Technical matters to be solved by this invention is: design and develop a kind of express highway intelligent helper-inducer system and control method based on the GPRS/CDMA wireless network; Can reduce effectively that highway knocks into the back and traffic hazard such as collision under inclement weathers such as sleet, hail and thick fog, can also reduce the probability of highway generation congestion in road simultaneously.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of express highway intelligent helper-inducer system based on the GPRS/CDMA wireless network is characterized in that it comprises a wireless network of being made up of transport information board node, variable speed-limit notice plate node, visibility probe node and background monitoring center;
1) transport information board node: be installed in boisterous express highway section porch such as easy generation sandstorm, thick fog; Under inclement weathers such as sleet, hail and thick fog; Issue corresponding induction information according to the road conditions parameter, feed back its induced inner content and duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously;
2) variable speed-limit notice plate node: be installed in the boisterous express highway sections such as easy generation sandstorm, thick fog, under inclement weathers such as sleet, hail and thick fog, according to road conditions parameter adjustment speed limit and spacing information; Feed back its displaying contents and duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously;
3) visibility detector node: be installed in the boisterous express highway sections such as easy generation sandstorm, thick fog; Be used to gather road conditions parameters such as visibility and humidity, and send the road conditions parameter to transport information board node, variable speed-limit notice plate node and background monitoring center through the GPRS/CDMA wireless network; Feed back its duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously;
4) background monitoring center: be connected with the GPRS/CDMA wireless network, be used for transport information board, variable speed-limit notice plate and visibility probe node are carried out the initialization setting and monitor its duty; The induced inner content of the road conditions parameter that transmits according to the visibility detector node simultaneously, transport information board node and variable speed-limit notice plate node feedback is formulated whole induction scheme, inducing regulating command to send to corresponding transport information board and variable speed-limit notice plate node through the GPRS/CDMA wireless network; And in the abominable especially road conditions condition emergent management such as road administration department closes a road to traffic that send a notice.
Said transport information board node is made up of LED display, GPRS/CDMA communication module, microprocessor and storer; The GPRS/CDMA communication module is connected through serial ports or SPI interface with microprocessor; Be used to receive the image data of visibility detector or the instruction at background monitoring center; This module is also fed back the induced inner content and the duty of transport information board node to backstage Surveillance center simultaneously; LED display is connected with microprocessor through 08 or 12 standard interfaces, is used to show induction information.
Said variable speed-limit notice plate node is made up of LED display, GPRS/CDMA communication module, microprocessor and storer; The GPRS/CDMA communication module is connected through serial ports or SPI interface with microprocessor; Be used to receive the image data of visibility detector or the instruction at background monitoring center; Feed back speed limit and the spacing and the duty of variable speed-limit notice plate simultaneously to backstage Surveillance center; LED display is connected with microprocessor through 08 or 12 standard interfaces, is used to show limiting vehicle speed value and spacing.
Said visibility detector node is made up of visibility measurement sensor, humidity sensor, GPRS/CDMA communication module, microprocessor and storer; Visibility is connected through serial ports or SPI interface with microprocessor with the moisture measurement sensor; Be used to gather road visibility and humidity information; The GPRS/CDMA communication module is connected through serial ports with microprocessor; Be used for transmitting the road conditions parameter of its collection, feed back the duty of visibility detector simultaneously to backstage Surveillance center to transport information board node, variable speed-limit notice plate node and background monitoring center.
Said background monitoring center is made up of server, control desk and GPRS/CDMA communication module, and this three part connects through high-speed local area network; Control desk carries out the initialization setting and transmits induction information adjustment instruction to transport information board and variable show tags board transport information board, variable speed-limit notice plate and visibility detector through the GPRS/CDMA communication module, and server is used to store the road conditions and the induction information of certain hour section.
A kind of express highway intelligent helper-inducer control method based on the GPRS/CDMA wireless network is characterized in that it may further comprise the steps:
(A) visibility detector that is installed in the highway section that hazes is easily gathered road conditions parameters such as visibility, humidity in real time and through the GPRS/CDMA network traffic information is sent to transport information board, variable speed-limit notice plate and background monitoring center;
(B) the transport information board is formulated induction scheme and through the LED display demonstration, is fed back its induction information to backstage Surveillance center simultaneously according to different traffic informations behind the traffic information that receives the visibility detector collection;
(C) the variable speed-limit notice plate is formulated rational speed limit according to different traffic informations and is shown with gap and by LED display after receiving the traffic information that visibility detector gathers, and feeds back its induction information to backstage Surveillance center simultaneously;
(D) complete road induction scheme in conjunction with other information such as road flow and congested in traffic situation, is formulated in the background monitoring center behind the traffic information that receives the visibility detector collection; Simultaneously according to the induction information of transport information board, the induction information of needs modification is adjusted and will be needed regulating command to send to relevant transport information board and variable speed-limit notice plate node through the GPRS/CDMA network with variable speed-limit notice plate feedback;
(E) transport information board and variable speed-limit notice plate feed back its duty through the GPRS/CDMA network to backstage Surveillance center at set intervals, so that whether background monitoring center monitoring relevant device is in proper working order.
This express highway intelligent helper-inducer system and control method have the following advantages and good effect:
(1) Traffic information is gathered in real time, is propagated in timeAll transport information boards, variable speed-limit sign board on the highway; And GPRS/CDMA wireless network of background monitoring center composition, the visibility information that Changes in weather causes can be sent to relevant transport information board, variable speed-limit notice plate and background monitoring center in the very first time.
(2) Reduce the traffic hazard incidence, reduce the congestion in road probabilityTo some burst meteorological disasters, through the correct guiding of this inducible system, the driver can in time grasp information, can effectively reduce the traffic hazard incidence, reduces the congestion in road probability.
(3) Be beneficial to management, practice thrift costTraditional information acquisition issue needs to use great amount of manpower to handle, and information utilization is not high, and handling cost is high.The GPRS/CDMA network cost that native system uses is cheap, adopt this system after, most of work is accomplished by transport information board node and visibility probe node automatically, reduces managerial personnel, improves the efficiency of management, the saving cost.
(4) Further improve the traffic guidance system, promote the modernization of traffic administrationThis system will become useful the replenishing of existing freeway net traffic guidance information issue system, and changing current most Expressway Service generally not have laying to be used to issue the present situation of the transport information board of guidance information.
In sum; The content of studying the proposition of this problem will help further to improve freeway management level and efficient; Help to reduce the traffic hazard incidence; Reduce the congested probability of road, help to excavate the huge passenger and freight transportation potentiality of freeway net the most at last, give full play to the advantage of its " fast speed, high-level efficiency, save time, high benefit ".Therefore, study this problem and will produce remarkable economic efficiency and social benefit, have important practical significance; Simultaneously, native system also is that technology of Internet of things, the GPRS/CDMA communication technology and sensor technology are used for the precedent that highway is induced, and has very big novelty and practicality.
Description of drawings
Fig. 1 is that the present invention lays and the application synoptic diagram in the system of highway;
Fig. 2 is that system of the present invention forms structured flowchart;
Fig. 3 is a vehicle guidance information issue process flow diagram of the present invention;
Fig. 4 is that system unit of the present invention is safeguarded process flow diagram.
Embodiment
Fig. 1 is that the present invention lays and the application synoptic diagram in the system of highway.The native system situ part is made up of the some transport information boards that are laid in porch, inclement weather highway section such as occurring sandstorm and dense fog easily, some visibility detectors and variable speed-limit notice plate three parts that are laid in the inclement weather highway sections such as occurring sandstorm and dense fog easily.
Fig. 2 is that system of the present invention forms structured flowchart.The present invention includes following four parts: transport information board node, variable speed-limit notice plate node, visibility detector node and background monitoring center four parts are formed, and this four part is formed a GPRS/CDMA wireless network.
Transport information board node: be installed in boisterous express highway section porch such as easy generation sandstorm, thick fog.Under inclement weathers such as sleet, hail and thick fog; Issue corresponding induction information according to road conditions parameter (mainly being the visibility parameter); As in visibility greater than 200 meters during less than 400 meters; Remind highway section, driver the place ahead visibility lower, please slow down to drive perhaps and select other roads to detour, strict simultaneously control high capacity waggon or heavy vehicle get into this highway section; , remind vehicle to select other roads or arrive first service area and have a rest during in visibility less than 100 meters; During less than 10 meters, remind vehicle to select other road in visibility, and show that this highway section seals; Feed back its induced inner content and duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously.Transport information board node is made up of LED display, GPRS/CDMA communication module, microprocessor and storer, and wherein microprocessor can be used the ARM series processors; LED display is connected with microprocessor through 08 or 12 standard interfaces; Be used to issue induction information (having mist to drive with caution, show the current road conditions in highway section etc.) as reminding driver the place ahead; The GPRS/CDMA communication module is connected through serial ports or SPI interface with microprocessor; Be used to receive the image data of visibility detector or the instruction at background monitoring center, this module is also fed back the induced inner content and the duty of transport information board node to backstage Surveillance center simultaneously.The traffic information that transport information board node is used to receive the collection of visibility probe node receives the induction information regulating command change displaying contents at background monitoring center to form preliminary induction scheme and to show through LED display; Also also periodically feed back its duty to backstage Surveillance center its induction information of feedback simultaneously through the GPRS/CDMA network.
Variable speed-limit notice plate node: be installed in the boisterous express highway sections such as easy generation sandstorm, thick fog.Under inclement weathers such as sleet, hail and thick fog, according to road conditions parameter (mainly being the visibility parameter) adjustment speed limit and spacing information; Feed back its displaying contents and duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously.Variable speed-limit notice plate node: be made up of LED display, GPRS/CDMA communication module, microprocessor and storer, wherein microprocessor can be used ARM series high-performance processor; LED display is connected with microprocessor through 08 or 12 standard interfaces; Be used to show limiting vehicle speed value and spacing spacing; The GPRS/CDMA communication module is connected through serial ports or SPI interface with microprocessor; Be used to receive the image data of visibility detector or the instruction at background monitoring center, simultaneously to the speed limit of backstage Surveillance center feedback variable speed-limit notice plate, maintain safe distance and duty.The traffic information that variable speed-limit notice plate node is used to receive the collection of visibility probe node receives the speed limit and the spacing regulating command change displaying contents at background monitoring center to form preliminary speed limit threshold value and spacing and to show through LED display; Also also periodically feed back its duty to backstage Surveillance center its display message of feedback simultaneously through the GPRS/CDMA network.
Visibility detector node: be installed in the boisterous express highway sections such as easy generation sandstorm, thick fog.Be used to gather road conditions parameters such as visibility and humidity, and send the road conditions parameter to transport information board node, variable speed-limit notice plate node and background monitoring center through the GPRS/CDMA wireless network; Feed back its duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously.The visibility detector node: be made up of Neng Jianduceliang humidity sensor, GPRS/CDMA communication module, microprocessor and storer, wherein microprocessor can use single-chip microcomputer or ARM series high-performance processor; Visibility and moisture measurement sensor are the visibility measurement equipment of high precision, good reliability; The reason that can provide visibility data and display visibility to change in real time; Can distinguish mist, dust and dried particle etc.; Visibility is connected through serial ports or SPI interface with microprocessor with the moisture measurement sensor, is used to gather road visibility and humidity parameter, and the GPRS/CDMA communication module is connected through serial ports with microprocessor; Be used for transmitting the road conditions parameter of its collection, simultaneously through the duty of GPRS/CDMA network to backstage Surveillance center feedback visibility detector node to transport information board, variable speed-limit notice plate and background monitoring center.
Background monitoring center: be connected with the GPRS/CDMA wireless network, be used for other equipment (transport information board, variable speed-limit notice plate and visibility probe node) is carried out the initialization setting and monitors its duty; The induced inner content of the road conditions parameter that transmits according to the visibility detector node simultaneously, transport information board and variable speed-limit notice plate node feedback is formulated whole induction scheme, inducing regulating command to send to corresponding transport information board and variable speed-limit notice plate node through the GPRS/CDMA wireless network; And in the abominable especially road conditions condition emergent management such as road administration department closes a road to traffic that send a notice.The background monitoring center: be made up of server, control desk (PC) and GPRS/CDMA wireless communication module, this three part connects through high-speed local area network; Control desk carries out the initialization setting and transmits induction information adjustment instruction to transport information board and variable show tags board transport information board, variable speed-limit notice plate and visibility detector through the GPRS/CDMA communication module, and server is used to store the road conditions and the induction information of certain hour section.The major function at background monitoring center is that transport information board, variable speed-limit notice plate and visibility detector are carried out the initialization setting and induce the adjustment instruction to transport information board and the transmission of variable show tags board, simultaneously can also be according to the duty formulation maintenance measure of each node feedback; Under the very poor situation of visibility, emergent management such as road administration department temporarily closes a road to traffic can also be notified in the background monitoring center.
Above-mentioned transport information board node, variable speed-limit notice plate node, visibility detector node and background monitoring center four parts communicate through the GPRS/CDMA agreement of standard.
Referring to Fig. 3, a kind of express highway intelligent helper-inducer system and control method based on the GPRS/CDMA wireless network is characterized in that it may further comprise the steps:
(A) visibility detector that is installed in the highway section that hazes is easily gathered road conditions parameters such as visibility, humidity in real time and through the GPRS/CDMA network traffic information is sent to transport information board, variable speed-limit notice plate and background monitoring center;
(B) the transport information board is formulated induction scheme and is shown that through LED display (as when road visibility possesses the vehicle pass-through condition, the prompting driver drives with caution according to different traffic informations behind the traffic information that receives the visibility detector collection; When road visibility can not be open to traffic, remind the driver to detour or arrive first server and have a rest; Recovering normal back in visibility reminds vehicle normally to pass through); Simultaneously to backstage Surveillance center its induction information of feedback;
(C) the variable speed-limit notice plate is behind the traffic information that receives the visibility detector collection; Formulate rational speed limit and gap and show according to different traffic informations by LED display; As in visibility during less than 200 meters, speed limit 60km/h maintains safe distance 100 meters; Visibility is during less than 100 meters, speed limit 40km/h, the 50 meters grades that maintain safe distance (above data from People's Republic of China's law on road traffic safety implementing regulations); Simultaneously to backstage Surveillance center its induction information of feedback;
(D) complete road induction scheme in conjunction with other information such as road flow and congested in traffic situation, is formulated in the background monitoring center behind the traffic information that receives the visibility detector collection; Simultaneously according to the induction information of transport information board, the induction information of needs modification is adjusted and will be needed regulating command to send to relevant transport information board and variable speed-limit notice plate node through the GPRS/CDMA network with variable speed-limit notice plate feedback.
(E) transport information board and variable speed-limit notice plate feed back its duty through the GPRS/CDMA network to backstage Surveillance center at set intervals, so that whether background monitoring center monitoring relevant device is in proper working order.
Fig. 4 is that system unit of the present invention is safeguarded process flow diagram.Transport information board node, variable speed-limit notice plate node and visibility detector node periodically feed back its duty through the GPRS/CDMA network to backstage Surveillance center, and corresponding maintenance measure is formulated according to the duty of each node feedback in the background monitoring center.

Claims (6)

1. the express highway intelligent helper-inducer system based on the GPRS/CDMA wireless network is characterized in that it comprises a wireless network of being made up of transport information board node, variable speed-limit notice plate node, visibility probe node and background monitoring center;
1) transport information board node: be installed in boisterous express highway section porch such as easy generation sandstorm, thick fog; Under inclement weathers such as sleet, hail and thick fog; Issue corresponding induction information according to the road conditions parameter, feed back its induced inner content and duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously;
2) variable speed-limit notice plate node: be installed in the boisterous express highway sections such as easy generation sandstorm, thick fog, under inclement weathers such as sleet, hail and thick fog, according to road conditions parameter adjustment speed limit and spacing information; Feed back its displaying contents and duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously;
3) visibility detector node: be installed in the boisterous express highway sections such as easy generation sandstorm, thick fog; Be used to gather road conditions parameters such as visibility and humidity, and send the road conditions parameter to transport information board node, variable speed-limit notice plate node and background monitoring center through the GPRS/CDMA wireless network; Feed back its duty through the GPRS/CDMA wireless network to backstage Surveillance center simultaneously;
4) background monitoring center: be connected with the GPRS/CDMA wireless network, be used for transport information board, variable speed-limit notice plate and visibility probe node are carried out the initialization setting and monitor its duty; The induced inner content of the road conditions parameter that transmits according to the visibility detector node simultaneously, transport information board node and variable speed-limit notice plate node feedback is formulated whole induction scheme, inducing regulating command to send to corresponding transport information board and variable speed-limit notice plate node through the GPRS/CDMA wireless network; And in the abominable especially road conditions condition emergent management such as road administration department closes a road to traffic that send a notice.
2. a kind of express highway intelligent helper-inducer system as claimed in claim 1 based on the GPRS/CDMA wireless network, it is characterized in that: said transport information board node is made up of LED display, GPRS/CDMA communication module, microprocessor and storer; The GPRS/CDMA communication module is connected through serial ports or SPI interface with microprocessor; Be used to receive the image data of visibility detector or the instruction at background monitoring center; This module is also fed back the induced inner content and the duty of transport information board node to backstage Surveillance center simultaneously; LED display is connected with microprocessor through 08 or 12 standard interfaces, is used to show induction information.
3. according to claim 1 or claim 2 a kind of express highway intelligent helper-inducer system based on the GPRS/CDMA wireless network, it is characterized in that: said variable speed-limit notice plate node is made up of LED display, GPRS/CDMA communication module, microprocessor and storer; The GPRS/CDMA communication module is connected through serial ports or SPI interface with microprocessor; Be used to receive the image data of visibility detector or the instruction at background monitoring center; Feed back speed limit and the spacing and the duty of variable speed-limit notice plate simultaneously to backstage Surveillance center; LED display is connected with microprocessor through 08 or 12 standard interfaces, is used to show limiting vehicle speed value and spacing.
4. according to claim 1 or claim 2 a kind of express highway intelligent helper-inducer system based on the GPRS/CDMA wireless network, it is characterized in that: said visibility detector node is made up of visibility measurement sensor, humidity sensor, GPRS/CDMA communication module, microprocessor and storer; Visibility is connected through serial ports or SPI interface with microprocessor with the moisture measurement sensor; Be used to gather road visibility and humidity information; The GPRS/CDMA communication module is connected through serial ports with microprocessor; Be used for transmitting the road conditions parameter of its collection, feed back the duty of visibility detector simultaneously to backstage Surveillance center to transport information board node, variable speed-limit notice plate node and background monitoring center.
5. according to claim 1 or claim 2 a kind of express highway intelligent helper-inducer system based on the GPRS/CDMA wireless network; It is characterized in that: said background monitoring center is made up of server, control desk and GPRS/CDMA communication module, and this three part connects through high-speed local area network; Control desk carries out the initialization setting and transmits induction information adjustment instruction to transport information board and variable show tags board transport information board, variable speed-limit notice plate and visibility detector through the GPRS/CDMA communication module, and server is used to store the road conditions and the induction information of certain hour section.
6. express highway intelligent helper-inducer control method based on the GPRS/CDMA wireless network is characterized in that it may further comprise the steps:
(A) visibility detector that is installed in the highway section that hazes is easily gathered road conditions parameters such as visibility, humidity in real time and through the GPRS/CDMA network traffic information is sent to transport information board, variable speed-limit notice plate and background monitoring center;
(B) the transport information board is formulated induction scheme and through the LED display demonstration, is fed back its induction information to backstage Surveillance center simultaneously according to different traffic informations behind the traffic information that receives the visibility detector collection;
(C) the variable speed-limit notice plate is formulated rational speed limit according to different traffic informations and is shown with gap and by LED display after receiving the traffic information that visibility detector gathers, and feeds back its induction information to backstage Surveillance center simultaneously;
(D) complete road induction scheme in conjunction with other information such as road flow and congested in traffic situation, is formulated in the background monitoring center behind the traffic information that receives the visibility detector collection; Simultaneously according to the induction information of transport information board, the induction information of needs modification is adjusted and will be needed regulating command to send to relevant transport information board and variable speed-limit notice plate node through the GPRS/CDMA network with variable speed-limit notice plate feedback;
(E) transport information board and variable speed-limit notice plate feed back its duty through the GPRS/CDMA network to backstage Surveillance center at set intervals, so that whether background monitoring center monitoring relevant device is in proper working order.
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CN102842240A (en) * 2012-09-07 2012-12-26 辽宁金洋集团信息技术有限公司 Early warning system for safety traffic of vehicle in fog region and safety traffic guidance method based on early warning system
CN103578269A (en) * 2013-05-21 2014-02-12 潘志坚 Intelligent speed prompting system and method enabling vehicle to cater to green light timing sequence
CN104103183A (en) * 2014-07-28 2014-10-15 张蕾 Automatic modification method and system of environmental self-adaptive traffic management parameters
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CN105761535A (en) * 2016-05-09 2016-07-13 塔里木大学 Method for dynamic speed limit of highway
CN107025797A (en) * 2017-06-07 2017-08-08 安徽远航交通科技有限公司 A kind of bad weather road conditions automatic early-warning system
CN103337184B (en) * 2013-07-11 2017-08-11 上海济安交通工程咨询有限公司 Urban road speed limit based on time, traffic flow and weather indicates system and control method
CN107170238A (en) * 2017-06-09 2017-09-15 山东中安科技股份有限公司 One kind driving apparatus for deivation and its joint control system
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CN103578269A (en) * 2013-05-21 2014-02-12 潘志坚 Intelligent speed prompting system and method enabling vehicle to cater to green light timing sequence
CN103337184B (en) * 2013-07-11 2017-08-11 上海济安交通工程咨询有限公司 Urban road speed limit based on time, traffic flow and weather indicates system and control method
CN104103183A (en) * 2014-07-28 2014-10-15 张蕾 Automatic modification method and system of environmental self-adaptive traffic management parameters
CN105761513A (en) * 2016-05-09 2016-07-13 塔里木大学 System for dynamic speed limit of highway
CN105761535A (en) * 2016-05-09 2016-07-13 塔里木大学 Method for dynamic speed limit of highway
CN108074407A (en) * 2016-11-18 2018-05-25 南京大学 A kind of method based on sensor optimization intelligent transportation induction
CN107025797A (en) * 2017-06-07 2017-08-08 安徽远航交通科技有限公司 A kind of bad weather road conditions automatic early-warning system
CN107170238A (en) * 2017-06-09 2017-09-15 山东中安科技股份有限公司 One kind driving apparatus for deivation and its joint control system
CN109040162A (en) * 2018-04-02 2018-12-18 贵州商学院 Highway Internet of things system based on solar energy
CN108877264A (en) * 2018-07-13 2018-11-23 河南汇纳科技有限公司 A kind of highway based on LoRa traffic information automatic prompt system on the way
CN111080812A (en) * 2019-12-09 2020-04-28 江苏金晓电子信息股份有限公司 Intelligent portal system oriented to free flow charging and vehicle-road cooperation and application
CN114822041A (en) * 2022-06-27 2022-07-29 南京纳尼亚科技有限公司 Lane-level highway driving sight line induction system under ultra-low visibility
CN114822041B (en) * 2022-06-27 2022-09-02 南京纳尼亚科技有限公司 Lane-level highway driving sight line induction system under ultra-low visibility

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