CN206773489U - Over the horizon bend vehicle meeting accessory system based on ARM embedded microcontrollers - Google Patents

Abstract

The utility model discloses a kind of over the horizon bend vehicle meeting accessory system based on ARM embedded microcontrollers, including infrared detection unit, host communication device, slave vehicular communication equipment；Infrared detection unit realizes that data communicate with host communication device, realizes that data communicate between host communication device and slave vehicular communication equipment；System the technology such as is wirelessly transferred using ARM embedded microcontrollers as core, with reference to infrared sensor, NRF, develops a kind of intelligent, information-based over the horizon bend vehicle meeting accessory system.Information is gathered using infrared sensor, is transmitted after data processing, then by NRF wireless communication modules.In the case where driver does not observe bend to always car, reach bus or train route by vehicle-mounted with wayside equipment and cooperate with, comprehensive bend vehicle meeting auxiliary information is provided with voice broadcast and screen display mode, realizes that over the horizon meeting is reminded, to the prompting of always car and overspeed prompting function, optimizes curve traffic.

Description

Over the horizon bend vehicle meeting accessory system based on ARM embedded microcontrollers

Technical field

A kind of bend vehicle meeting accessory system is the utility model is related to, is specifically that one kind is based on the embedded microcontrollers of ARM The over the horizon bend vehicle meeting accessory system of device.

Background technology

With the continuous growth developed rapidly with vehicles number of communication, the importance of road safety increasingly carries It is high.Driver's visual range is restricted at accident sharp turn occurred frequently, can not be found opposed vehicle in advance and be easily caused accident.Existing road Road installation legacy equipment can sighting distance deficiency and exist because climatic factor influence can not round-the-clock use the defects of.

At present, with the rapid development of auto industry, the constantly improve of road traffic infrastructure, the convenient journey of resident trip Degree has increased significantly.People are while Modern Traffic convenience and comfort is enjoyed to the full, also by various traffic problems Puzzlement, wherein especially prominent is exactly curved road safety problem.Bend vehicle meeting refers to enter in the shorter curved areas of driving sight distance Row to always car with crossing.China's road traffic accident statistics is shown within 2012, and bend accident quantity occupies China road The 10.5% of road traffic accident total amount, and the order of severity of accident is much larger than straight section.Wherein, the too small sharp turn of radius makes to drive The sight blind area increase for the person of sailing, bad influence is brought to safe driving, the accident of car to car impact easily occurs, causes serious friendship Interpreter's event.Damaed cordition caused by bend accident is as shown in table 1 below：

The sharp turn accident costs of table 1

Wherein, the accident rate at the too small sharp turn of turning radius is far more than other types bend, is generally set for this bend Put convex mirror auxiliary meeting.However, the bend of convex mirror is set to still suffer from problems with：

（1）Driver only can just see offside road conditions when nearer from convex mirror, and can not predict opposed vehicle Position and time of cars meeting.If have to always car, the reaction time deficiency of driver, it is difficult to make correct counter-measure.

（2）In night and misty rain weather, convex mirror is influenceed visibility reduction by natural conditions, driver is difficult to really Recognize to situation.

（3）Convex mirror surface is fragile, causes mirror image to obscure, and causes driver to judge by accident.

Domestic and international present Research：

Part studies in China mechanism is directed to curve traffic safety problem, and the theory of learning intelligence traffic system is believed with modern Breath technology, the linear and traffic characteristics at sharp turn is analyzed, road speed limit and traffic safety facilities are improved and studied, and Related analogue system is worked out.At present, the domestic intelligent prompt early warning emulation system for having been developed that a kind of mountain area bend vehicle meeting System, the problem of intending to solve hill path blind area bend vehicle meeting, make bend vehicle meeting safer.But first there has been no related mock-up.Emulation System is only capable of being reminded with regard to the bend situation under single file situation at present and only reminded to carrying out car to whetheing there is, and function is too single, And the processor used is compared with other equipment and relatively fallen behind.

External main direction of studying is to make each metropolitan major crossing and highway using electronics, information technology The meeting of entrance, with car auxiliary information, intellectuality.And almost do not have in the small towns of small and medium-sized cities, mountain area sharp turn and tourist road There is application, current this bend can only place convex mirror to solve the problems, such as the meeting of bend, still suffer from certain safety problem.

Based on above-mentioned traffic safety hidden danger, design and exploitation bend vehicle meeting accessory system, realize that car is real-time with car Over the horizon information exchange, the security of vehicle bend meeting can be better ensured that, meet that highway communication tends to be intelligent with believing The growth requirement of breathization.

Utility model content

Therefore, in order to solve above-mentioned deficiency, the utility model provides a kind of super based on ARM embedded microcontrollers herein Sighting distance bend vehicle meeting accessory system, realizes the function to always car, meeting and overspeed prompting, driver is foreseen bend in time Offside road conditions, reduce bend vehicle meeting accident rate.

The utility model is achieved in that a kind of over the horizon bend vehicle meeting based on ARM embedded microcontrollers of construction Accessory system, it is characterised in that：Including infrared detection unit, host communication device, slave vehicular communication equipment；Infrared detection list Member realizes that data communicate with host communication device, realizes that data communicate between host communication device and slave vehicular communication equipment；

The infrared detection unit includes infrared emission end and infrared receiver end；

The host communication device includes host SCM module and main frame NRF wireless modules；One-chip computer module and main frame NRF wireless modules connect；

The slave vehicular communication equipment includes vehicle-mounted NRF modules, slave one-chip computer module, car-mounted display module and vehicle-mounted Voice module；Slave one-chip computer module is connected with vehicle-mounted NRF modules, car-mounted display module and vehicle-mounted voice module respectively；

Wherein, main frame NRF wireless modules and vehicle-mounted NRF moulds are passed through between host communication device and slave vehicular communication equipment Block realizes radio communication.

According to the over the horizon bend vehicle meeting accessory system described in the utility model based on ARM embedded microcontrollers, it is special Sign is：The system also includes roadside display screen, and roadside display screen realizes that data communicate with host communication device.

The bend vehicle meeting accessory system based on ARM embedded microcontrollers designed by the utility model, it is intended to realize car With the real-time over the horizon information exchange of car, the security of vehicle bend meeting can be better ensured that, meets that highway communication tends to intelligence Energyization and information-based growth requirement.The performance of traffic safety facilities is improved from the angle of technology, improves China's bend and hands over Logical dangerous present situation, it is the problem of answering emphasis to consider at present.Design the bend vehicle meeting auxiliary system under a kind of bus or train route cooperative surroundings System, assist driver make the decision-making of next step when crossing bend, realize the real-time, interactive of information between car and car, car and people.It is logical Whether have car, real-time overspeed warning, meeting prompting, vehicle information and roadside display information, reach if crossing in front of offer bend The purpose of meeting is aided in, so as to greatly improve the security of sharp turn meeting, reduces the accident rate of curve traffic.

The vehicle can for being fitted without mobile unit learns that road information is equipped with vehicle module by wayside equipment Voice broadcast and meeting overspeed prompting can be obtained.

Just only passed through with realizing that multiple functions run into the vehicle of no mobile unit if vehicle module and wayside equipment coordinate Wayside equipment prompting is system degradation operation.

The utility model has the following advantages that：The system is using ARM embedded microcontrollers as core, with reference to infrared sensing Device, NRF such as are wirelessly transferred at a kind of intelligent, information-based over the horizon bend vehicle meeting accessory system that technological development goes out.During implementation Information is gathered using infrared sensor, is passed after host communication device single-chip microcomputer processing data, then by NRF wireless communication modules It is defeated.In the case where driver does not observe bend to always car, reach bus or train route by vehicle-mounted with wayside equipment and cooperate with, with voice Report and screen display mode provides comprehensive bend vehicle meeting auxiliary information, realize that over the horizon meeting is reminded, always car is reminded With overspeed prompting function, optimize curve traffic.The system can also be run in misty rain weather and when night, strong adaptability. System extends the application of intelligent transportation under bus or train route cooperative surroundings, compensate for legacy equipment and applies upper deficiency in road, Advantageously reduce bend accident rate, the safety of support vehicles.

Brief description of the drawings

Fig. 1 is Tthe utility model system structural representation

Fig. 2 is Tthe utility model system module composition schematic diagram

Fig. 3 is the utility model correlation infrared tube detection circuit theory diagrams

Fig. 4 is the utility model NRF transmission means schematic diagrames

Fig. 5 is the utility model OLED schematic diagrams

Fig. 6 is Tthe utility model system Core Feature schematic diagram

Fig. 7 is Tthe utility model system module and functional cohesion figure

Fig. 8 is the circuit theory diagrams of the utility model host machine part

Fig. 9 is the circuit theory diagrams of the utility model host machine part.

Embodiment

The utility model is described in detail below in conjunction with accompanying drawing 1- Fig. 9, to the skill in the utility model embodiment Art scheme is clearly and completely described, it is clear that and described embodiment is only the utility model part of the embodiment, and The embodiment being not all of.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creativeness The every other embodiment obtained under the premise of work, belong to the scope of the utility model protection.

The utility model is directed to the main reason for accident rate higher during vehicle meeting in bend and accident generation, develops A kind of new, interconnection, the over the horizon bend vehicle meeting accessory system of intelligence.Road vehicle is detected using roadside infrared sensor, So as to the letter such as collection vehicle speed, vehicle.After data processing, it is transmitted, is realized vehicle-mounted aobvious by NRF wireless communication modules Show and show two kinds of indicating modes with roadside.It can be provided entirely for it in the case of bend is not observed to always car in driver The bend information in face, realizes meeting miscellaneous function.System is carried out perfect with regulation according to the actual requirements, optimized existing Bend system.System architecture is as shown in Figure 1.

Including infrared detection unit 1, host communication device 2, slave vehicular communication equipment 3；Infrared detection unit 1 and main frame Communicator 2 realizes that data communicate, and realizes that data communicate between host communication device 2 and slave vehicular communication equipment 3.

The infrared detection unit 1 includes infrared emission end 1a and infrared receiver end 1b；

The host communication device 2 includes host SCM module and main frame NRF wireless modules；One-chip computer module and main frame NRF wireless modules connect；

The slave vehicular communication equipment 3 includes vehicle-mounted NRF modules, slave one-chip computer module, car-mounted display module and car Carry voice module；Slave one-chip computer module is connected with vehicle-mounted NRF modules, car-mounted display module and vehicle-mounted voice module respectively.

System forms and principle：System is using ARM Cortex-M0+ core processors as core（The system mainly has two big Module, mobile unit and wayside equipment, two parts have processor, and the wherein processor of mobile unit is mainly responsible for judging meeting With hypervelocity, the processor of wayside equipment is mainly responsible for the information progress computing of sensor collection calculating car speed vehicle etc. Information）, roadside system and mobile unit cooperative cooperating between the two, realize by detecting road seizure condition, vehicle location The situation of bend offside is provided with the relevant information such as speed for driver.System module is mainly by mainboard, infrared sensor, main frame Five NRF, vehicle-mounted NRF, loudspeaker, OLED submodules parts form, and composition is as shown in Figure 2.

Correlation infrared ray sensor：That is infrared tube is a kind of physical property using infrared ray to measure Sensor, it is made up of infrared transmitting tube and reception pipe.Correlation type infrared ray sensor and reflecting interrupter are a pair For Infrared emitting and receiving pipe by circuit transformations into the finished product after switching signal, it has been internally integrated amplifying circuit, have PNP and Output is pulled down on the output of NPN normally-open normally-closes or voltage.Do not produce with object when infrared ray sensor measures and directly contact, have There is high sensitivity, react fast, low cost and other advantages.

Wayside sensors enter it is curved before and corner installed on both sides of the road along road.When vehicle is by blocking infrared ray, chip leads to Cross the detection of pin trailing edge and can determine whether that the cell position has vehicle process.It is red by detecting adjacent position for car speed The time difference of outer sensor triggering, you can calculate the travel speed by vehicle；, can be by infrared for vehicle traffic direction To the trigger position of pipe, you can judge vehicle traffic direction；For type of vehicle, this group uses three adjacent infrared tubes To judge type of vehicle, if vehicle can only cover two simultaneously to pipe, it is determined as dilly；If vehicle can cover three simultaneously It is individual to pipe, then be determined as oversize vehicle；Thus the detection of single unit vehicle operation information can be realized.The Cleaning Principle electricity of infrared tube Road is as shown in Figure 3.

Mainboard：For system using ARM Cortex-M0+ core processors as core, the mainboard of host machine part is minimum for single-chip microcomputer System board, it is the system that a kind of single-chip microcomputer formed with minimum element can work, generally comprise crystal oscillator, reset circuit and Three parts of power supply.Single-chip microcomputer is one of important means for realizing various mechanical electronic equipment controls, and single-chip microcomputer is due to possessing body The features such as product is small, cost is low, high-performance is widely used.Mainboard handles the data from sensor, calculates the operation letter of vehicle Breath.

Main frame NRF modules：NRF wireless communication modules are also known as NRF2401, are that the single-chip produced by Nordic companies is wireless Transceiving chip, the whole world for working in 2.4GHz~2.5GHz exempt to apply（ISM）Frequency.Chip includes a fully-integrated frequency Synthesizer, power amplifier, crystal oscillator and modulator.NRF wireless communication modules are applied to wireless system for transmitting data etc. The occasion of various wireless communication.

The information of collection is sent to main frame KL26 chips by infrared sensor module, and chip is calculated and handled, obtained Specific information, radio communication is carried out by main frame NRF modules and sent information to by the vehicle-mounted NRF submodules on bend vehicle Block, then slave is sent information to by NRF submodules.Transmission means is as shown in Figure 4.

Vehicle-mounted NRF modules：The information that vehicle-mounted NRF modules primary recipient roadside NRF primary modules transmit, and the information is sent To vehicle-mounted KL26 reception chips, loudspeaker module is transmitted information to by chip again, carried in a manner of voice and display screen are shown Wake up driver.

Loudspeaker module：Loudspeaker module is mounted in a kind of speech ciphering equipment on vehicle, directly support MP3, WMA, WAV files.System shifts to an earlier date typing information of voice prompt in loudspeaker module, when receiving the information that KL26 chips transmit, It is matched with the voice messaging of typing in advance, and voice messaging is played out, is reminded and driven in a manner of more direct, comprehensive The person's of sailing bend opposite situation.

OLED module：OLED, i.e. Organic Light Emitting Diode, also known as Organic Electricity laser display.Because possesses frivolous, power saving Etc. characteristic, this display device is widely applied on MP3 players.System OLED module is by infrared sensor module The bend opposed vehicle presentation of information of collection prompts driver in the OLED display screen in mobile unit and roadside display device To occupancy situation, the speed of opposed vehicle and the vehicle to track.Its principle is as shown in Figure 5.

Systemic-function is realized：

System core function：System is made up of roadside and mobile unit, using NRF wireless communication technology transmission informations, is led to Automation roadside is crossed with mobile unit to make up driver due to the limitation of field range and to the limitation of road conditions judgement. In addition, system is shown using mobile unit and roadside shows two ways as driver with information, a series of meeting auxiliary are realized Function.The Core Feature of the system is as shown in Figure 6.

System provides meeting using " overspeed prompting ", " reminding always car ", " meeting prompting " three kinds of methods to driver The information of auxiliary is as follows with reference to system comprising modules, function：

（1）Overspeed prompting：According to《Road technical specification》Relevant criterion, vehicle have different peaces in different sections of highway traveling Full speed limit.System sets speed limit according to standard, each group infrared sensor of triggering installation when vehicle passes through bend, by red The travel speed of vehicle is calculated to the data of pipe collection outside.The upper limit if speed outpaces, vehicle-mounted voice equipment will remind car Hypervelocity.

（2）Always car is reminded：When roadside, infrared sensor is detected to when having the vehicle to enter bend, using NRF without Line communication technology will pass through vehicle-mounted language to carrying out the information transfers such as car, opposed vehicle vehicle and car speed to this to vehicle to having Sound and display device are reminded, while roadside display device is displayed that to occupancy situation, the speed of opposed vehicle to track And vehicle.

（3）Meeting is reminded：By roadside infrared sensor module determine opposed vehicle and this to vehicle location, when vehicle phase When adjusting the distance close to safe distance, vehicle-mounted voice equipment reminds driver i.e. by meeting.

Five module cooperations of the above coordinate, and realize the Core Feature of three parts of system.

System with KL26 single-chip microcomputers, infrared sensor, loudspeaker, NRF communication etc. technology, set up roadside system with it is vehicle-mounted System, realize and exceed the speed limit, be as shown in Figure 7 with functional cohesion to always car and meeting prompting function, system module.

For each function of display systems, a River Bend Models are first made, respectively to " overspeed prompting ", " to always Car prompting ", " meeting prompting " three scenes carry out physical object simulatings.Bend uses the U-shaped bend of standard, and adds 5 systems Submodule, wherein for error caused by reduction infrared tube installation, avoid signal cover should with testing requirements mounting distance Transmitting tube and reception pipe, are staggered installation of, solve this contradiction, drop to error by caused contradiction as near as possible by this group It is minimum.After road model forming, difference testing wireless communication NRF modules, OLED module, loudspeaker module.

（1）Overspeed prompting：Enter curved direction, position and speed information for judge vehicle, infrared receiving tube reception signal is led to Cable connection is crossed to interrupt to enter PORT to single-chip processor i/o mouth, the triggering of single-chip processor i/o mouth trailing edge.In interruption, vehicle is touched The infrared tube position of hair is recorded.Meanwhile trigger single-chip microcomputer and start timing, when the next infrared tube of vehicle arrival, touch Single-chip microcomputer when producing that signals stops timing, so as to judge vehicle location, speed and vehicle.

（2）Meeting is reminded：When one direction, which has, carrys out car, system sends vehicle occupied information to roadside display screen, and leads to Wireless communication module is crossed, to sending occupied information to mobile unit, bend can be obtained by the infrared tube position that is triggered In two car relative positions, when apart from it is close when can determine whether meeting i.e..

（3）Always car is reminded：After mobile unit receives information, to driving in a manner of voice message and display screen are shown Member is provided to carrying out car information to having, and according to enter it is curved before the information that gathers of infrared detection unit, provided to driver to always The vehicle information of car.

System is using ARM Cortex-M0+ core processors as core, with reference to infrared sensor, NRF Radio Transmission Technologys etc. Technology, for a kind of intelligent, information-based over the horizon meeting accessory system.

Embedded system development technology：Embedded system, with reference to software and hardware, has volume based on computer technology Small, low in energy consumption, the advantages that processing speed is fast, cost-effective, it is widely used in road traffic related system under bus or train route cooperative surroundings Design.System controller from En Zhi Pus company cortex-m0+ core processors carry out microcomputer development design, 32 Cortex-M0+ processors employ inexpensive 90 nanometers of low-power consumption（LP）Technique, power consumption only 9 μ A/MHz are about main at present / 3rd of stream 8 or 16 bit processors, can but provide higher performance.The characteristics of Cortex-M0+ processors, facilitates intelligence Can, it interconnect, the advantage of low-power consumption microcontroller.Single-chip microcomputer is hardcore in system, adds peripheral circuit and designs and make Go out wayside equipment master board and mobile unit master board and the prompting equipment of meeting accessory system, complete it is corresponding receive with Send the function of information.

NRF wireless communication technologys：A kind of mode for referring to carry out data transmission using wireless technology is wirelessly transferred, it is installed The characteristics such as conveniently, flexibility is strong, cost performance is high cause the monitoring system of more conglomerate to use wireless transmission method, establish monitored Connection between point and Surveillance center.Wireless information transfer is the crucial control process of meeting accessory system, and implementation effect is direct Information order of accuarcy is influenceed, also contributes to system job stability.Wireless data exchange function is mainly wireless with 2.4G frequency ranges Communication equipment, targetedly offside road occupied information is provided towards unilateral vehicle, single communication port is established, prevents vehicle Communication contention aware occurs between wayside equipment, influences normal accessory system alarm function.It can be realized using wireless data module Information real-time delivery allows driver to have the reaction time of abundance on bend with interacting.

System Functional Test：The River Bend Models to have completed are exceeded the speed limit, three portions are reminded to always car and meeting The inspection divided, the main accuracy of detection for testing infrared sensor calculate speed with single-chip microcomputer, judge the degree of accuracy of vehicle.

To the accuracy of vehicle location identification：Accuracy to vehicle location identification is accurately to catch car based on infrared tube Occupied information, technique index are similarly the key problem in technology point of our solutions, and have been properly settled.In single-chip microcomputer The corresponding particular location in bend of the infrared tube in each cured trigger signal source, so it identifies accuracy There is basic guarantee.Position measurement data are as shown in table 2 and table 3：

The position recognition detection of table 2

Group number	Testing time	Number of success	Success rate（%）
				1	10	10	100
2	10	10	100
				3	10	10	100
4	10	10	100
				5	10	10	100

The vehicle meeting of table 3 detects

Group number	Testing time	Number of success	Success rate（%）
				1	10	10	100
2	10	10	100
				3	10	10	100
4	10	10	100
				5	10	10	100

To the accuracy of vehicle speed detection：The principle to be tested the speed by infrared tube is touched by adjacent infrared tube The distance between the time of detection and adjacent infrared tube is sent out to calculate average speed.In order to which calculated value can be closer to the instantaneous of vehicle Speed, it is desirable to the distance of phase adjacency pair pipe is the smaller the better, but because our infrared tube spacing is also used for judging type of vehicle, Away from can not infinitely reduce.However, when vehicle bend speed reaches 60km/h or so, vehicle passes through adjacent infrared tube Time is about 150-210 milliseconds, and it is instantaneously fast to be entirely capable of replacement vehicle by the average speed of adjacent infrared tube under 3m spacing Degree.Detected to whether system progress car speed exceeds the speed limit, as a result as shown in table 4：

The overspeed of vehicle of table 4 detects

Group number	Testing time	Number of success	Success rate（%）
				1	10	9	90
2	10	10	100
				3	10	10	100
4	10	10	100
				5	10	10	100
It is average	——	——	98

To the accuracy of vehicle type recognition：Collection based on us to Vehicle length data, and to big in road traffic The usual definition of car, comprising large-scale passenger vehicle, in, large-scale dolly length（4.0m-4.5m）, cart length（>6m）, we adopt The infrared tube for being 3m with three neighbor distances judges type of vehicle, if vehicle can only cover two simultaneously to pipe, judges For dilly；If vehicle can cover three simultaneously to pipe, it is determined as oversize vehicle.Test data is as shown in table 5, table 6：

The cart vehicle of table 5 judges

Group number	Testing time	Number of success	Success rate（%）
				1	10	9	90
2	10	10	100
				3	10	10	100
4	10	9	90
				5	10	10	100
It is average	——	——	96

The dolly vehicle of table 6 judges

Group number	Testing time	Number of success	Success rate（%）
				1	10	10	100
2	10	10	100
				3	10	9	90
4	10	9	90
				5	10	10	100
It is average	——	——	96

Drawn a conclusion after tested：For the infrared tube clipping room set during test away from for 3cm, corresponding real road is 3m. The Vehicle length of general dolly is about 4.0-4.5m.Here away under, it is known that the timing error of KL26 single-chip microcomputers is 1-2 microseconds, And when car speed reaches 60km/h or so, vehicle is about 150-210 milliseconds by the time of adjacent infrared tube.Therefore 3m By the average speed of adjacent infrared tube under spacing, it is entirely capable of substituting vehicle instantaneous velocity.Judge accordingly, this detecting system Precision is entirely capable of meeting actual requirement.

The innovative point and advantage of this patent：

Innovative point：System utilizes embedded development technology, realizes the bend vehicle meeting auxiliary based on ARM embedded microcontrollers The exploitation of system, its innovation characteristic are as follows：

（1）With the vehicle-mounted Core Feature that system is realized with roadside double mode：Driver can be by roadside display screen, vehicle-mounted Display screen and voice broadcast obtain relevant information, system except provide it is basic to always car information in addition to, can also realize that this car surpasses Speed and meeting prompting function.Driver passes through vehicle-mounted and roadside double mode system in the case where not observing bend to always car System obtains information, to be ready in advance, reduces the accident rate of bend vehicle meeting.

（2）Solar storage battery is powered：System is applied to some more remote sections, and is dropped with some control strategies Low-power consumption.In the section of no electric power system, for its power supply and be able to can accomplish to supply for a long time by solar storage battery completely Electricity.

（3）System round-the-clock running：Relative to legacy equipment, system could be used that in misty rain and when night, fit It is wider with scope, and equipment during operation at flexual center is in sleep state, and working condition is entered when vehicle passes through, so The power consumption of reduction system.

Works advantage：With respect to convex mirror, system has advantages below based on electronic equipment, relative to convex mirror, such as Shown in table 7：

The comparison of the over the horizon bend vehicle meeting accessory system of table 7 and convex mirror

Function compares	Convex mirror	Over the horizon bend vehicle meeting accessory system
			Horizon range	It only can just see that offside road takes feelings with a distance from nearer from convex mirror Condition, and opposed vehicle position and time of cars meeting can not be predicted.	When there is vehicle to enter curved areas, system detectio, which goes out information of vehicles and is shown in the roadside of offside road, to be shown Display screen, and the vehicle meeting by voice reminder into bend
Effect of natural conditions	At night and misty rain weather, it is difficult to confirm offside road feelings by convex mirror Condition.	Using electronic equipment, round-the-clock running is smaller by natural conditions interference, and the system is not by field-of-view angle Limitation, can adapt to all kinds of complex road conditions.
			Alerting pattern	Offside road occupancy situation can not be prompted.	Driver's road conditions can be prompted by roadside, mobile unit

System has some following advantage：

（1）Perfect in shape and function, the prompting that offside road conditions are carried out to the vehicle without mobile unit can be shown by roadside, And can is to there is the vehicle of mobile unit to carry out dual display, voice message driver's meeting auxiliary information, in the environment of bus or train route collaboration The lower optimization for realizing bend vehicle meeting, so that it is guaranteed that safety.

（2）With stronger versatility, the detection to road conditions can reach by the change of sensing station and quantity, Sharp turn road suitable for accident easily occurs.

（3）Low energy consumption, low cost, are powered using solar storage battery, can realize the long-time power supply of equipment, it is ensured that system Normal operation.

Application prospect：System solves the limitation of driver sighting distance itself with vehicle-mounted and automation wayside equipment at this stage And the problem of causing to predict in time to road conditions, the optimization of bend vehicle meeting is realized in the environment of bus or train route collaboration.Together When, there is also a variety of ways of promotion, application prospect are as follows for system：

（1）The scope of application：Blind area be present within sweep of the eye when sharp turn travels for driver and the feelings of accident easily occur Condition, and over the horizon bend vehicle meeting accessory system is devised, suitable for mountain area, rural area, tourism section, extend to urban road. Driver can select to install mobile unit, if not installing, can also aid in meeting by the observation to roadside display screen.In trip Section is swum, mobile unit can also be installed by way of lease on vehicle.System can be run under night, misty rain weather, The round-the-clock traffic safety for ensureing vehicular traffic.

（2）Promoted extension：Can be car-mounted device by the system integration, it is pre- as a kind of driving safety suitable for Special zone Alert instrument（Cyberdog）, or a kind of extension function as safe early warning instrument, on the basis of the function of cyberdog in itself, enrich The function in sharp turn section.Driving safety early-warning apparatus is incorporated, can broadly promote the system.

（3）Economic and Efficiency Analysis：The problem of economic loss that sharp turn accident is brought has been very important, according to analysis, road Road, still there is higher accident rate, causes to hand over big economic loss in the case of there is provided convex mirror.Use this curved Road meeting accessory system, the traffic accident that can largely avoid sharp turn from occurring, so as to reduce economic loss.

（4）Social benefit is analyzed：Shown according to Chinese transportation accident statistics annual report data, drawn every year due to bend accident Play different degrees of traffic accident and result in huge economic loss.Over the horizon bend vehicle meeting accessory system can effectively reduce bend Accident rate, it is ensured that human pilot drives safely, and advances informationization, the intellectuality of road traffic construction process.

Claims (2)

1. A kind of 1. over the horizon bend vehicle meeting accessory system based on ARM embedded microcontrollers, it is characterised in that：The system includes Infrared detection unit（1）, host communication device（2）, slave vehicular communication equipment（3）；Infrared detection unit（1）With main-machine communication Device（2）Realize that data communicate, host communication device（2）With slave vehicular communication equipment（3）Between realize data communicate；

   The infrared detection unit（1）Including infrared emission end（1a）With infrared receiver end（1b）；

   The host communication device（2）Including host SCM module and main frame NRF wireless modules；One-chip computer module and main frame NRF wireless modules connect；

   The slave vehicular communication equipment（3）Including vehicle-mounted NRF modules, slave one-chip computer module, car-mounted display module and vehicle-mounted Voice module；Slave one-chip computer module is connected with vehicle-mounted NRF modules, car-mounted display module and vehicle-mounted voice module respectively；

   Wherein, host communication device（2）With slave vehicular communication equipment（3）Between pass through main frame NRF wireless modules and vehicle-mounted NRF Module realizes radio communication.
2. 2. the over the horizon bend vehicle meeting accessory system based on ARM embedded microcontrollers, its feature exist according to claim 1 In：The system also includes roadside display screen（4）, roadside display screen（4）With host communication device（2）Realize that data communicate.