CN101612914A - A kind of automobile speed limit caution system and method - Google Patents

A kind of automobile speed limit caution system and method Download PDF

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Publication number
CN101612914A
CN101612914A CN200910033604A CN200910033604A CN101612914A CN 101612914 A CN101612914 A CN 101612914A CN 200910033604 A CN200910033604 A CN 200910033604A CN 200910033604 A CN200910033604 A CN 200910033604A CN 101612914 A CN101612914 A CN 101612914A
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CN
China
Prior art keywords
speed
described
alerting signal
unit
color light
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Application number
CN200910033604A
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Chinese (zh)
Inventor
朱跃明
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朱跃明
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Priority to CN200910033604A priority Critical patent/CN101612914A/en
Publication of CN101612914A publication Critical patent/CN101612914A/en

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Abstract

A kind of automobile speed limit caution system, described speed-limit warning system comprises: a kind of automobile speed limit caution system is characterized in that described speed-limit warning system comprises: memory cell, the orientation that is used to store each road indicates and standard of the limited speed; GPS positioning-speed-measuring unit is responsible for collecting current car speed information and current orientation indicates and export to control unit; Control unit is divided at least two velocity shootings according to current automotive operation speed and standard of the limited speed, and is judged the residing velocity shooting of current automotive operation speed interval, exports corresponding alerting signal according to described judged result; The alerting signal transmitter unit receives control unit and sends or output signal; Concept color light generator receives the signal of alerting signal transmitter unit and exports corresponding warning light; Wherein, described memory cell, GPS positioning-speed-measuring unit are connected with control unit respectively with the alerting signal transmitter unit.The invention also discloses a kind of method for limiting speed of automobile speed limit caution system.On the one hand, can in real time, dynamically reflect car speed information behind employing the present invention, fundamentally solve the untimely problem of overspeed alarm.On the other hand, can make steerman in reasonable range, improve the speed of a motor vehicle as far as possible, thereby improve the current rate of road.

Description

A kind of automobile speed limit caution system and method

Technical field

The present invention relates to a kind of automobile-used speed-limit warning system, relate in particular to a kind of system and method that utilizes the GPS navigation technology steerman to be carried out speed-limit warning.

Background technology

In automobile increasing today, road is more and more crowded, and road conditions also become increasingly complex, and the traffic accident that causes because of hypervelocity takes place frequently.Also exist the problems such as imperfection of hardware facility in the behind of traffic law strictness, be extruded with the following aspects problem:

(1) driving sight and gauge panel visual angle are too big in the process of moving for steerman, check that instrument can disperse the attention of steerman.

(2) steerman at the alert order sign of the speed limit in roadside, because problems such as the sight line of steerman and road conditions can cause the carelessness to the alert order sign of these speed limits, therefore can not play desirable effect in the process of moving.

Find through investigation that (3) most of steermans are just by touch speed driving in the process of moving, under the situation that does not have prompting, often ignore the speed of car speed, cause accidentally driving over the speed limit.

At the problems referred to above, prior art provides the sound prompt device of using on a kind of navigational aid, this device carries out voice suggestion to steerman behind overspeed of vehicle, this kind prompting mode weak point is when controlling the people when hearing voice suggestion, in fact for automobile itself, be in overspeed condition, even steerman is made the reaction that reduces the speed of a motor vehicle rapidly, but because the principle of object inertia, so automobile is impossible immediately by reduction of speed, even license plate number just might be violating the regulations by the electronic police record in the reduction of speed process.In addition, this kind sound prompt device can not point out the speed of a motor vehicle low excessively situation, thereby causes because the speed of a motor vehicle is low excessively the road rate being reduced.

Therefore, there is following shortcoming at least in the sound prompt device of prior art: only when the hypervelocity transformation point corresponding prompt is arranged, therefore the promptness of prompting is relatively poor, can not in real time, dynamically reflect car speed information.

Summary of the invention

At the problems referred to above, the invention provides a kind of speed-limit warning system and method that can in real time, dynamically reflect car speed information.

For realizing above goal of the invention, the invention provides a kind of automobile speed limit caution system, described speed-limit warning system comprises: a kind of automobile speed limit caution system is characterized in that, described speed-limit warning system comprises: memory cell, and the orientation that is used to store each road indicates and standard of the limited speed; GPS positioning-speed-measuring unit is responsible for collecting current car speed information and current orientation indicates and export to control unit; Control unit is divided at least two velocity shootings according to current automotive operation speed and standard of the limited speed, and is judged the residing velocity shooting of current automotive operation speed interval, exports corresponding alerting signal according to described judged result; The alerting signal transmitter unit receives control unit and sends or output signal; Concept color light generator receives the signal of alerting signal transmitter unit and exports corresponding warning light; Wherein, described memory cell, GPS positioning-speed-measuring unit are connected with control unit respectively with the alerting signal transmitter unit.

Preferentially, described concept color light generator comprises: the alerting signal receiving element receives the alerting signal of described alerting signal transmitter unit; At least one gate circuit unit is responsible for the alerting signal that receives is carried out logic determines; At least one concept color light generating unit is responsible for sending the caution light of different colours; With the independent cooresponding driver element of each concept color light generating unit, each concept color light generating unit is controlled; Wherein, described alerting signal receiving element, gate circuit unit, driver element and notion light generating unit are connected successively.

Preferentially, described concept color light generator also comprises: unit with an automatic light meter, regulate the brightness of warning light according to environmental light brightness, and this unit with an automatic light meter links to each other with described driver element.

Preferentially, described concept color light generator is sent red, yellow, green three kinds of caution light, wherein, red caution light representative hypervelocity section notion, yellow caution light is represented critical hypervelocity section notion, and green caution light is represented safety speed section notion.

Preferentially, described alerting signal transmitter unit and described concept color light generator are carried out data transmission by wireless mode.

Preferentially, described data transfer mode is any of infrared transmission, microwave transmission, Laser Transmission, radio wave transmissions or ultrasonic transmission.

Preferentially, described alerting signal transmitter unit and described concept color light generator are carried out data transmission by wired mode.

Preferentially, described data transfer mode is any of Optical Fiber Transmission, CAN bus transfer or the transmission of Modbus network.

Simultaneously, the present invention also provides a kind of method for limiting speed of automobile speed limit caution system, and this automobile speed limit caution system comprises control unit, memory cell, and GPS positioning-speed-measuring unit, the alerting signal transmitter unit, concept color light generator also comprises step:

A, described GPS positioning-speed-measuring unit obtain the running velocity and the orientation sign of current automobile as calculated and export to control unit by receiving the gps satellite data-signal;

B, described control unit indicate and obtain from memory cell the standard of the limited speed of current road according to the orientation of current road;

C, divide at least two velocity shootings, and judge the residing velocity shooting of current automotive operation speed interval, by the alerting signal transmitter unit alerting signal is passed to concept color light generator according to described judged result according to current automotive operation speed and standard of the limited speed;

D, described concept color light generator are according to described alerting signal output corresponding warning light.

Because automobile speed limit caution system of the present invention and method can in real time, dynamically reflect car speed information on the one hand, therefore fundamentally solved the untimely problem of overspeed alarm.On the other hand, can make steerman in reasonable range, improve the speed of a motor vehicle as far as possible, thereby improve the current rate of road.

Description of drawings

Fig. 1 is the block diagram of a preferential embodiment of the present invention

Fig. 2 is the block diagram of an embodiment of concept color light generator of the present invention.

Fig. 3 is the diagram of circuit of an embodiment of method for limiting speed of automobile speed limit caution system of the present invention.

The specific embodiment

In order to make those skilled in the art person understand the present invention program better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with embodiment and embodiment accompanying drawing.

Embodiment 1

See also Fig. 1, block diagram for a preferential embodiment of speed-limit warning of the present invention system, comprise a control unit, be responsible for various signals are compared and treated, specifically, control unit is at first divided at least two velocity shootings according to current automotive operation speed and standard of the limited speed, as safety speed section and hypervelocity section, but the quantity of velocity shooting is not unique, be apparently, can set three velocity shootings according to customer requirement, as the safety speed section, hypervelocity section and critical speed section, so-called critical section can be made as the ratio certain with standard of the limited speed with this section according to the steerman personal like fully, such as positive and negative 5% interval or positive and negative 8% interval of standard of the limited speed all are fine, control unit is judged the residing velocity shooting of current automotive operation speed interval then, exports corresponding concept color light according to described judged result; Memory cell, the orientation that is used to store each road indicates and standard of the limited speed; GPS positioning-speed-measuring unit is responsible for collecting car speed information and current orientation indicates and export to control unit; The alerting signal transmitter unit is responsible for sending or output alarm signal; Concept color light generator receives the information of alerting signal transmitter unit and exports caution light according to the speed of a motor vehicle.

Described memory cell is connected with control unit, and the medium of memory cell can be flash media (as SD card, miniSD card, CF card), magnetic disk media (as the portable hard drive of installing on the common notebook) etc.Cell stores all kinds of electronic map datas, comprise the standard of the limited speed information of geographical location information and each bar road of each bar road.

Described GPS positioning-speed-measuring unit is connected with control unit, GPS positioning-speed-measuring unit practical function is a gps signal receiver, receive of the displacement of gps satellite data-signal, calculate the three-dimensional position and the moving velocity of automobile, and information is passed to control unit by automobile in the unit time.

Described alerting signal transmitter unit is connected with control unit, as an alerting signal feedway, the preferential infrared transmitting device that adopts of present embodiment, actual is an infrared light emitting diode, controlled unit controls is sent infrared ray according to the instruction of control unit.It is low to adopt infrared transmitting device to have a cost, advantages such as disturbance rejection.

See also Fig. 2, shown concept color light generator, this concept color light generator comprises the alerting signal receiving element, receives the alerting signal of described alerting signal transmitter unit; At least one gate circuit unit is responsible for the alerting signal that receives is carried out logic determines; At least one concept color light generating unit is responsible for sending the caution light of different colours; With the independent cooresponding driver element of each concept color light generating unit, each concept color light generating unit is carried out drive controlling; Described alerting signal receiving element, gate circuit unit, driver element and notion light generating unit are connected successively.The alerting signal receiving element receives the alerting signal of alerting signal transmitter unit, adopt infrared light-emitting diode as preceding described alerting signal transmitter unit, what therefore this receiving element adopted is the infrared receiver (as infrared receiving terminal) that mates therewith, convert the infrared ray that receives to electric signal, and give gate circuit unit with this electric signal transmission, by gate circuit alerting signal is carried out logic determines, and the concept color light generating unit is driven by the gate circuit trigger drive unit, the concept color light generating unit is the LED light-emitting diode, specifically, the described concept color light generator of present embodiment has three LED light-emitting diodes, be respectively the red LED light-emitting diode, yellow led light-emitting diode and green LED light-emitting diode, correspondingly be that concept color light generator has three corresponding to light-emitting diode driver element and have three independently gate circuit unit control drive unit independently.Be apparently, the quantity of LED light-emitting diode is not unique, can be made as one, two, three, four according to the different user needs ... N, therefore described gate circuit and driver element also are one, two, three, four that are complementary ... N.

In addition, for light adaptation daytime of making light-emitting diode and night human eye luminous sensitivity, each driver element also is connected with a unit with an automatic light meter, this unit can convert the optical signal of surround lighting to electric signal, and pass to driver element, thereby realized that driver element regulates the brightness of light-emitting diode according to environmental light brightness.

Need to prove that present embodiment has omitted the explanation to some other yuan hardware and software: as the power subsystem unit of power supply is provided for total system, operating system, application software, drive program, because these soft, its principle of work of hardware, connection mode all belongs to the known technology of this area, and those skilled in the art can understand the principle of work that them fully, and they neither innovation part of the present invention, so the applicant will not be described in detail one by one to them.

Below set forth the principle of work of the described automobile speed limit caution system of present embodiment.

Described GPS positioning-speed-measuring unit receives the gps signal that gps satellite sends, and accurately locatees the velocity information of the geographical location information and the automobile at automobile place; Secondly, indicate, determine the standard of the limited speed in this highway section according to the road orientation of geographical location information by the storage of memory cell; Then, determine velocity shooting by control unit according to current automotive operation speed and described standard of the limited speed, with 60 kilometers of standard of the limited speed per hour, the critical speed section is that positive and negative 5% of standard of the limited speed is example, the safety speed section is for per hour being lower than 57 kilometers so, the critical speed section be 57 to 63 kilometers per hour, the hypervelocity velocity shooting greater than 63 kilometers per hour is, above-mentioned positive and negative 5% just illustrative explanation, protection scope of the present invention is not done any qualification, it is positive and negative 8% that steerman is made as, even positive and negative 20% all is fine; Judge the residing velocity shooting of present speed by control unit again, and export corresponding alerting signal, after the alerting signal receiving element of concept color light generator receives corresponding alerting signal, this signal is passed to corresponding gate circuit unit, by gate circuit unit control corresponding driving unit; By driver element corresponding notion light generating unit is driven at last, promptly send the caution light of respective color, the described caution light of embodiments of the invention preferentially adopts red caution light (the notion light of representative hypervelocity velocity shooting), yellow caution light (representing the notion light of critical speed section) and green caution light (representing the notion light of safety speed section).

Embodiment 2

Described alerting signal transmitter unit is a microwave launcher, and described alerting signal receiving element is a microwave receiving device, and all the other are identical with embodiment 1.

Embodiment 3

Described alerting signal transmitter unit is a laser beam emitting device, and described alerting signal receiving element is a laser receiver, and all the other are identical with embodiment 1.

Embodiment 4

Described alerting signal transmitter unit is the radio wave transmission device, and described alerting signal receiving element is the radiowave receiving device, and all the other are identical with embodiment 1.

Embodiment 5

Described alerting signal transmitter unit is a ultrasonic transmission device, and described alerting signal receiving element is a ultrasonic probe, ultrasonic receiver, and all the other are identical with embodiment 1.

Embodiment 6

Described alerting signal transmitter unit is the optical fiber output unit, and described alerting signal receiving element is the optical fiber input media, and all the other are identical with embodiment 1.

Embodiment 7

Described alerting signal transmitter unit is a CAN bus output unit, and described alerting signal receiving element is the total Line Input Devices of CAN, and all the other are identical with embodiment 1.

Embodiment 8

Described alerting signal transmitter unit is a Modbus network output unit, and described alerting signal receiving element is a Modbus network input media, and all the other are identical with embodiment 1.

Embodiment 9

Described alerting signal is sent concept color light by the shell of existing GPS navigation equipment, and all the other are identical with embodiment 1.

The method for limiting speed of automobile speed limit caution system of the present invention, as shown in Figure 3, described automobile speed limit caution system comprises control unit, memory cell, GPS positioning-speed-measuring unit, the alerting signal transmitter unit, concept color light generator also comprises the steps:

S1: described GPS positioning-speed-measuring unit indicates and exports to control unit by running velocity and the orientation that gps satellite obtains current automobile.

GPS positioning-speed-measuring unit receives the gps signal that gps satellite sends, and accurately locatees the velocity information of the geographical location information and the automobile at automobile place, and information is exported to control unit.

S2: described control unit indicates and obtains from memory cell the standard of the limited speed of current road according to the orientation of current road.

S3: divide at least two velocity shootings according to current automotive operation speed and standard of the limited speed, and judge the residing velocity shooting of current automotive operation speed interval, by the alerting signal transmitter unit alerting signal is passed to concept color light generator according to described judged result.

Specifically, determine velocity shooting by control unit according to current automotive operation speed and described standard of the limited speed, still per hour with 60 kilometers of foregoing standard of the limited speed, the critical speed section is that positive and negative 5% of standard of the limited speed is example, the safety speed section is for per hour being lower than 57 kilometers so, the critical speed section be 57 to 63 kilometers per hour, the hypervelocity velocity shooting greater than 63 kilometers per hour is, above-mentioned positive and negative 5% just illustrative explanation, protection scope of the present invention is not done any qualification, it is positive and negative 8% that steerman is made as, even positive and negative 20% all is fine; Judge the residing velocity shooting of present speed by control unit again, and export corresponding alerting signal

S4: described concept color light generator is according to alerting signal output caution light.

Described concept color light generator comprises the alerting signal receiving element, receives the alerting signal of described alerting signal transmitter unit; At least one gate circuit unit is responsible for the alerting signal that receives is carried out logic determines; At least one concept color light generating unit is responsible for sending the caution light of different colours; With the independent cooresponding driver element of each concept color light generating unit, each concept color light generating unit is controlled; After the alerting signal receiving element of concept color light generator receives corresponding alerting signal, this signal is passed to corresponding gate circuit unit, by gate circuit unit control corresponding driving unit; By driver element corresponding notion light generating unit is driven at last, promptly send the caution light of respective color, described caution light preferentially adopts red caution light (the notion light of representative hypervelocity velocity shooting), yellow caution light (representing the notion light of critical speed section) and green caution light (representing the notion light of safety speed section).

In addition, the applicant is packaged in described concept color light generator in the transparent automobile decoration thing, for example in the automobile perfume bottle, in the glasswork toy of automobile, reach effect elegant in appearance.The applicant can also install charactron can demonstrate this moment when sending caution light moving velocity in concept color light generator.The applicant can also be arranged at this notion optical generator under the Windshield, as reflecting medium, provides the speed prompting to steerman by Windshield on the one hand; On the other hand, reflect caution light by Windshield.The applicant in addition can described remember with gratitude increase audio unit in the optical generator, when caution light sends, increase the prompting mode of short sound warning.

The above; it only is the specific embodiment of the present invention; should be noted that protection scope of the present invention is not limited thereto; as long as by the apparatus and method of warning light to pointing out in a certain velocity shooting; and anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.

Claims (9)

1, a kind of automobile speed limit caution system is characterized in that, described speed-limit warning system comprises:
Memory cell, the orientation that is used to store each road indicates and standard of the limited speed;
GPS positioning-speed-measuring unit is responsible for collecting current car speed information and current orientation indicates and export to control unit;
Control unit is divided at least two velocity shootings according to current automotive operation speed and standard of the limited speed, and is judged the residing velocity shooting of current automotive operation speed interval, exports corresponding alerting signal according to described judged result;
The alerting signal transmitter unit receives control unit and sends or output signal;
Concept color light generator receives the signal of alerting signal transmitter unit and exports corresponding warning light;
Wherein, described memory cell, GPS positioning-speed-measuring unit are connected with control unit respectively with the alerting signal transmitter unit.
2, automobile speed limit caution system according to claim 1 is characterized in that, described concept color light generator comprises:
The alerting signal receiving element receives the alerting signal of described alerting signal transmitter unit;
At least one gate circuit unit is responsible for the alerting signal that receives is carried out logic determines;
At least one concept color light generating unit is responsible for sending the caution light of different colours;
With the independent cooresponding driver element of each concept color light generating unit, each concept color light generating unit is controlled;
Wherein, described alerting signal receiving element, gate circuit unit, driver element and notion light generating unit are connected successively.
3, automobile speed limit caution system according to claim 2 is characterized in that, described concept color light generator also comprises: unit with an automatic light meter, regulate the brightness of warning light according to environmental light brightness, and this unit with an automatic light meter links to each other with described driver element.
4, automobile speed limit caution system according to claim 1, it is characterized in that, described concept color light generator is sent red, yellow, green three kinds of caution light, wherein, red caution light representative hypervelocity section notion, yellow caution light is represented critical hypervelocity section notion, and green caution light is represented safety speed section notion.
5, according to each described automobile speed limit caution system of claim 1 to 4, it is characterized in that described alerting signal transmitter unit and described concept color light generator are carried out data transmission by wireless mode.
6, automobile speed limit caution system according to claim 5 is characterized in that, described data transfer mode is any of infrared transmission, microwave transmission, Laser Transmission, radio wave transmissions or ultrasonic transmission.
7, according to each described automobile speed limit caution system of claim 1 to 4, it is characterized in that described alerting signal transmitter unit and described concept color light generator are carried out data transmission by wired mode.
8, automobile speed limit caution system according to claim 7 is characterized in that, described data transfer mode is any of Optical Fiber Transmission, CAN bus transfer or the transmission of Modbus network.
9, a kind of method for limiting speed of automobile speed limit caution system according to claim 1, this automobile speed limit caution system comprises control unit, memory cell, GPS positioning-speed-measuring unit, the alerting signal transmitter unit, concept color light generator is characterized in that also comprising step:
A, described GPS positioning-speed-measuring unit obtain the running velocity and the orientation sign of current automobile as calculated and export to control unit by receiving the gps satellite data-signal;
B, described control unit indicate and obtain from memory cell the standard of the limited speed of current road according to the orientation of current road;
C divides at least two velocity shootings according to current automotive operation speed and standard of the limited speed, and judges the residing velocity shooting of current automotive operation speed interval, by the alerting signal transmitter unit alerting signal is passed to concept color light generator according to described judged result;
D, described concept color light generator are according to described alerting signal output corresponding warning light.
CN200910033604A 2009-06-24 2009-06-24 A kind of automobile speed limit caution system and method CN101612914A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102529809A (en) * 2012-02-24 2012-07-04 奇瑞汽车股份有限公司 Speed-limiting device of vehicle and speed-limiting method thereof
CN102682609A (en) * 2012-01-13 2012-09-19 惠州善领科技有限公司 Speed measurement early warning method and device for road interval
EP2514652A1 (en) 2011-04-14 2012-10-24 Thomas Rastija Method and device for limiting the speed of a motor vehicle
CN102765351A (en) * 2012-07-03 2012-11-07 广州亿程交通信息有限公司 Vehicle speed pre-warning method
CN103359123A (en) * 2013-07-04 2013-10-23 陈根 Intelligent vehicle speed control and management system and implementing method thereof
CN103411620A (en) * 2013-08-06 2013-11-27 浙江大学 Automobile overspeed detecting and warning navigation device and navigation method thereof
CN103500514A (en) * 2013-09-11 2014-01-08 奇瑞汽车股份有限公司 Vehicle speed early-warning method, device and system in special road section
CN103794072A (en) * 2012-10-30 2014-05-14 奥迪股份公司 Method for warning a driver of a vehicle about exceeding of a speed limit, and vehicle
CN104050817A (en) * 2014-05-23 2014-09-17 北京中交兴路信息科技有限公司 Speed limiting information base generation and speed limiting information detection method and system
CN104064048A (en) * 2014-06-30 2014-09-24 奇瑞汽车股份有限公司 Automobile curve operation speed processing system and automobile curve operation speed processing method based on vehicle-road cooperation
CN104155469A (en) * 2014-08-12 2014-11-19 深圳市凯立德欣软件技术有限公司 Interval velocity measurement prompting method and electronic device
CN105034806A (en) * 2015-06-30 2015-11-11 贵州大学 Overspeed prevention alarming system for vehicle

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2514652A1 (en) 2011-04-14 2012-10-24 Thomas Rastija Method and device for limiting the speed of a motor vehicle
CN102682609A (en) * 2012-01-13 2012-09-19 惠州善领科技有限公司 Speed measurement early warning method and device for road interval
CN102529809A (en) * 2012-02-24 2012-07-04 奇瑞汽车股份有限公司 Speed-limiting device of vehicle and speed-limiting method thereof
CN102765351A (en) * 2012-07-03 2012-11-07 广州亿程交通信息有限公司 Vehicle speed pre-warning method
CN102765351B (en) * 2012-07-03 2014-12-17 广州亿程交通信息有限公司 Vehicle speed pre-warning method
CN103794072A (en) * 2012-10-30 2014-05-14 奥迪股份公司 Method for warning a driver of a vehicle about exceeding of a speed limit, and vehicle
CN103359123B (en) * 2013-07-04 2016-01-06 陈根 A kind of intelligent vehicle speed Control management system and implementation method
CN103359123A (en) * 2013-07-04 2013-10-23 陈根 Intelligent vehicle speed control and management system and implementing method thereof
CN103411620A (en) * 2013-08-06 2013-11-27 浙江大学 Automobile overspeed detecting and warning navigation device and navigation method thereof
CN103500514A (en) * 2013-09-11 2014-01-08 奇瑞汽车股份有限公司 Vehicle speed early-warning method, device and system in special road section
CN104050817A (en) * 2014-05-23 2014-09-17 北京中交兴路信息科技有限公司 Speed limiting information base generation and speed limiting information detection method and system
CN104064048A (en) * 2014-06-30 2014-09-24 奇瑞汽车股份有限公司 Automobile curve operation speed processing system and automobile curve operation speed processing method based on vehicle-road cooperation
CN104155469A (en) * 2014-08-12 2014-11-19 深圳市凯立德欣软件技术有限公司 Interval velocity measurement prompting method and electronic device
CN104155469B (en) * 2014-08-12 2019-11-29 深圳市凯立德欣软件技术有限公司 Test the speed reminding method and electronic equipment for a kind of section
CN105034806A (en) * 2015-06-30 2015-11-11 贵州大学 Overspeed prevention alarming system for vehicle

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