CN104240519A - Overspeed warning system - Google Patents
Overspeed warning system Download PDFInfo
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- CN104240519A CN104240519A CN201310239756.7A CN201310239756A CN104240519A CN 104240519 A CN104240519 A CN 104240519A CN 201310239756 A CN201310239756 A CN 201310239756A CN 104240519 A CN104240519 A CN 104240519A
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- led
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- nave boss
- hypervelocity
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Abstract
The invention relates to an overspeed warning system which comprises an overspeed warning disk. The overspeed warning disk comprises a hub connecting plate, a chuck and LED lamps. The hub connecting plate is provided with a first threaded hole matched with a bolt on a hub. The first threaded hole is matched with the bolt on the hub and used for fixing the hub connecting plate to the hub. The chuck is fixed to the hub connecting plate, and a cavity used for containing a speed sensing and measuring module, a signal processing module and a self-powered module is formed between the chuck and the hub connecting plate. The LED lamps are arranged on the side, far away from the hub connecting plate, of the chuck. The self-powered module is used for supplying power to the speed sensing and measuring module, the signal processing module and the LED lamps. The speed sensing and measuring module transmits measured speed information to the signal processing module. The signal processing module receives the speed information and controls the LED lamps to be turned on or turned off according to the speed information. The overspeed warning disk can play a role in warning surrounding vehicles in the overspeed traveling process of a vehicle.
Description
Technical field
The present invention relates to test and measuring technique and apparatus field, particularly relate to a kind of hypervelocity caution system.
Background technology
Heavy vehicle is driven over the speed limit becomes the one of the main reasons of major traffic accidents, and this new nickname-" highway killer " that allowed truck and lorry have, on a highway, almost must have accident can be associated with heavy vehicle in every two accidents.According to the data display that the Ministry of Public Security announces, although heavy goods vehicle only accounts for 8% of vehicle guaranteeding organic quantity, the mortality ratio of traffic hazard is caused to account for 28%, 2012 years, truck traffic accident in the whole nation causes 18621 people dead, and these accidents more than fifty percent cause because truck or truck exceed the speed limit.From Henan, public security bureau learns, the first quarter in this year, and 177 truck accidents occur altogether in this province, and cause 69 people dead, 145 people are injured, and wherein accident over half all causes owing to exceeding the speed limit.Visible, should pay much attention to for driving over the speed limit of heavy vehicle, occur to avoid more traffic accident.At present, most domestic truck and lorry do not install hypervelocity or speed-limiting device, therefore, design a kind of alarming device that exceeds the speed limit and will have the larger market demand.
General vehicle speed measuring system is only arranged on some section of highway, for carrying out warning function to the hypervelocity of driver, comprises velocity radar and filming apparatus.Utilize velocity radar to the vehicle speed measuring of process, start filming apparatus when hypervelocity being detected and image taking is carried out to over-speed vehicles, then furious driving is punished.Which plays certain warning function to driver, makes driver be provided with the section not furious driving as far as possible of area covered by the radar speed-detecting network, but cannot play warning function to whole section.Other velocity-measuring system is arranged on vehicle itself, if there is overspeed situation, can sound and carry out warning hypervelocity, but this is just to self warning, can not warn surrounding vehicles.
Summary of the invention
Based on this, be necessary to provide a kind of hypervelocity caution system that can play hypervelocity warning function in overspeed of vehicle driving process to surrounding vehicles.
A kind of hypervelocity caution system, comprises the hypervelocity warning dish for being arranged on vehicle hub and is placed in car sensing measurement module, signal processing module and the self-powered module in described hypervelocity warning dish;
Wherein, described hypervelocity warning dish comprises nave boss brace, chuck and LED, described nave boss brace is provided with the first threaded hole matched with the bolt on nave boss, and described first threaded hole coordinates with the bolt on described nave boss, for described nave boss brace is fixed on nave boss; Described chuck is fixed on described nave boss brace, and the cavity be formed between described chuck and described nave boss brace for accommodating described speed of a motor vehicle sensing measurement module, signal processing module and self-powered module, described LED is located on the side of described chuck away from described nave boss brace;
Described self-powered module is used for powering to described speed of a motor vehicle sensing measurement module, described signal processing module and described LED, described speed of a motor vehicle sensing measurement module passes to described signal processing module by measuring the speed information obtained, described signal processing module receives described speed information, and controls the unlatching of described LED according to described speed information or close.
Wherein in an embodiment, described chuck and the close side of described nave boss brace offer draw-in groove, and described nave boss brace is arranged in described draw-in groove.
Wherein in an embodiment, the connecting portion that described nave boss brace comprises main part and is connected with described main part, described main part is discoid, described connecting portion comprises three spaced list structures, described list structure one end is connected with described main part, and described first threaded hole is located on the other end of described list structure; The cavity for accommodating speed of a motor vehicle sensing measurement module, signal processing module and self-powered module is formed between described chuck and described main part.
Wherein in an embodiment, described hypervelocity warning dish also comprises warning valve snail bolt, and described nave boss brace centre is provided with the second threaded hole for being fixedly connected with described chuck, described chuck is provided with the 3rd threaded hole, and described chuck is fixed on described nave boss brace by described warning valve snail bolt, described second threaded hole and described 3rd threaded hole.
Wherein in an embodiment, described chuck is discoid, described chuck comprises away from the side of described nave boss brace the sectorial lamp district that three central angles are 120 °, be respectively the first LED district, the second LED district and the 3rd LED district, whether described LED is that circular arc wire is arranged in described first LED district, the second LED district and the 3rd LED district, be used to indicate vehicle and exceed the speed limit and overspeed condition.
Wherein in an embodiment, the center of circle of described chuck and the center of circle of the circular arc line formed with described LED lay respectively at the both sides of the circular arc line formed with described LED, and described first LED district, the second LED district and the 3rd LED district are equipped with the LED of 14 uniform intervals distributions.
Whether, wherein in an embodiment, described LED is also located on described fan-shaped radius, be used to indicate the number of times of overspeed of vehicle or be used to indicate vehicle and break down.
Wherein in an embodiment, the side of described chuck away from described nave boss brace is also provided with the hypervelocity be connected with described signal processing module and checks switch and the failure warning switch with described self-powered model calling, described hypervelocity checks that switch and failure warning switch run through described chuck.
Wherein in an embodiment, the side that described chuck is fixedly connected with described nave boss brace is also provided with fixed support, and described fixed support is flexibly connected with described nave boss brace by pin.
Wherein in an embodiment, on the side that described chuck is fixedly connected with described nave boss brace, and corresponding described fixed support center position is provided with locking mechanism, and described locking mechanism is for locking described fixed support.
Above-mentioned hypervelocity caution system is fixed on the wheel hub of vehicle by hypervelocity warning dish.And be placed in speed of a motor vehicle sensing measurement module, signal processing module and self-powered module in hypervelocity warning dish with the use of, can make to be located at chuck and open (flicker) or closedown (not glimmering) away from the LED on the side of nave boss brace.When overspeed of vehicle travels, LED is opened, and ceaselessly glimmers.Thus making above-mentioned hypervelocity caution system can play warning function to surrounding vehicles, surrounding vehicles driver sees that warning (LED flicker) just can carry out the spacing of maintenance to over-speed vehicles that slow down afterwards, the generation avoided traffic accident.
Accompanying drawing explanation
Fig. 1 is the structural representation of the hypervelocity caution system of an embodiment;
Fig. 2 is the back view of the hypervelocity warning dish in Fig. 1;
Fig. 3 is the sectional view of the hypervelocity warning dish in Fig. 1;
Fig. 4 is the structural representation of nave boss brace in the hypervelocity warning dish in Fig. 1 and warning valve snail bolt;
Fig. 5 is the stereographic map of the hypervelocity warning dish in Fig. 1;
Fig. 6 is the support bracket fastened stereographic map in the hypervelocity warning dish in Fig. 1;
Fig. 7 is the pattern of the LED flicker of hypervelocity caution system in overspeed of vehicle 20% scope in Fig. 1;
Fig. 8 is the pattern of the LED flicker of hypervelocity caution system within the scope of overspeed of vehicle 20%-50% in Fig. 1;
Fig. 9 is the pattern of the LED flicker of hypervelocity caution system overspeed of vehicle more than 50% time in Fig. 1;
Figure 10 is the display figure of overspeed of vehicle number of times;
Figure 11 is the pattern of the LED flicker of vehicle when breaking down.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, hypervelocity caution system of the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
As shown in Figure 1, the hypervelocity caution system 10 of an embodiment, comprises hypervelocity warning dish 100, self-powered module 200, speed of a motor vehicle sensing measurement module 300 and signal processing module 400.
As Figure 1-4, the warning dish 100 that exceeds the speed limit comprises nave boss brace 110, chuck 120, warning valve snail bolt 130 and LED 140.Hypervelocity warning dish 100 is for being arranged on the wheel hub of vehicle.
Nave boss brace 110 is provided with the first threaded hole 112, first threaded hole 112 matched with the bolt on nave boss and coordinates with the bolt on nave boss, for nave boss brace 110 is fixed on nave boss.
In present embodiment, the connecting portion that nave boss brace 110 comprises main part 114 and is connected with main part 114.Main part 114 is discoid, and connecting portion comprises three spaced list structures 116, and wherein, list structure 116 one end is connected with main part 114, and the first threaded hole 112 is located on the other end of list structure 116.When the wheel hub of vehicle is provided with five bolts, five bolts form regular pentagon, therefore, in the present embodiment, the center of main part 114 and the center superposition of regular pentagon, and the first threaded hole 112 on list structure 116 overlaps with the position of the bolt on nave boss.Be appreciated that in other embodiments, main part 114 can be also other shapes, as square, rectangle, triangle etc.
Nave boss brace 110 centre is provided with the second threaded hole (not shown) for being fixedly connected with chuck 120, and the second threaded hole runs through the centre of nave boss brace 110.In the present embodiment, nave boss brace 110 centre is the position at the place, the center of circle of main part 114.
Chuck 120 is provided with the both sides that the 3rd threaded hole the 121, three threaded hole 121 runs through chuck 120, and certainly, the 3rd threaded hole 121 also only can run through the side of chuck 120 near nave boss brace 110.Chuck 120 is fixed on nave boss brace 110 by warning valve snail bolt 130, second threaded hole and the 3rd threaded hole 121.Be appreciated that in other embodiments, chuck 120 also can adopt the modes such as glue bond to be fixed on nave boss brace 110.In the present embodiment, chuck 120 is discoid, and the 3rd threaded hole 121 is located on the centre of chuck 120.Warning valve snail bolt 130 is hexagon head bolt.Be appreciated that in other embodiments, chuck 120 also can be square shape, trapezoidal shape etc.
In order to prevent chuck 120 from producing relative rotation relative to nave boss brace 110, the side that chuck 120 is connected with nave boss brace 110 offers draw-in groove 111, and nave boss brace 110 is arranged in draw-in groove 111.The structure of the nave boss brace 110 in present embodiment relatively with the structure nave boss brace such as square, circular, can be more stable be arranged in draw-in groove 111.Obviously, nave boss brace 110 also can be the structure such as square, circular.
The cavity 150 for accommodating self-powered module 200, speed of a motor vehicle sensing measurement module 300 and signal processing module 400 is formed between nave boss brace 110 and chuck 120.Thus making the compact conformation of hypervelocity caution system 10, volume is less.In the present embodiment, due to the structure of nave boss brace 110, the cavity 150 for accommodating self-powered module 200, speed of a motor vehicle sensing measurement module 300 and signal processing module 400 is formed between main part 114 and chuck 120.
LED 140 is located on the side of chuck 120 away from nave boss brace 110, and runs through the side of chuck 120 near nave boss brace 110, for being connected with self-powered module 200 and signal processing module 300.LED 140 self-powered module 200, speed of a motor vehicle sensing measurement module 300 and signal processing module 400 with the use of under, can open (flicker) or close (not glimmering).When overspeed of vehicle travels, LED is opened, and ceaselessly glimmers, and can play warning function to surrounding vehicles, and surrounding vehicles driver sees that warning (LED flicker) just can carry out the spacing of maintenance to over-speed vehicles that slow down afterwards, the generation avoided traffic accident.
As shown in Figure 5, in the present embodiment, the overspeed condition of over-speed vehicles is better known for the ease of the driver around over-speed vehicles, with the center of circle of chuck 120 for the center of circle, also be the position at the 3rd threaded hole 121 place, chuck 120 is divided into away from the side of nave boss brace 110 the sectorial lamp district that three central angles are 120 °, is respectively the first LED district 123 of LED district 122, second and the 3rd LED district 124.Wherein, whether LED 140 is arranged in the first LED district 123 of LED district 122, second and the 3rd LED district 124 in circular arc wire, be used to indicate vehicle and exceed the speed limit and overspeed condition.In the present embodiment, the center of circle of chuck 120 and the center of circle of the circular arc line formed with LED 140 lay respectively at the both sides of the circular arc line formed with LED 140, and the shape of three articles of circular arc lines that the first LED district 123 of LED district 122, second and the 3rd LED district 124 are formed with LED 140 is identical, and every bar circular arc line is all the LED 140 distributed by 14 uniform intervals forms.
Be appreciated that, in other embodiments, the center of circle of chuck 120 and the center of circle of the circular arc line formed with LED 140 also all can be positioned at the homonymy of the circular arc line formed with LED 140, and the shape of three articles of circular arc lines that the first LED district 123 of LED district 122, second and the 3rd LED district 124 are formed with LED 140 also can not be identical, the number forming the LED 140 of circular arc line does not also limit 14.
Further, in the present embodiment, whether chuck 120 is divided into by three radiuses the sectorial lamp district that three central angles are 120 ° away from the side of nave boss brace 110, and fan-shaped radius is also provided with LED 140, be used to indicate the number of times of overspeed of vehicle or be used to indicate vehicle and break down.Every bar radius is equipped with 4 LED.
Chuck 120 checks switch 125 and failure warning switch 126 away from the side of nave boss brace 110 being also provided with hypervelocity, and hypervelocity checks that switch 125 and failure warning switch 126 run through chuck 120.Hypervelocity checks that switch 125 is for being connected with signal processing module 400, and failure warning switch 126 is for being connected with self-powered module 200.
Vehicle there will be fault in the process of moving unavoidably, therefore, as shown in Figures 2 and 6, in the present embodiment, the side that chuck 120 is fixedly connected with nave boss brace 110 is provided with fixed support 127, and fixed support 127 is flexibly connected with nave boss brace 110 by pin 128.After vehicle breaks down in the process of moving, chuck 120 can be unloaded from nave boss and be placed in vehicle side, can be used as triangle warning plate and use, noticing that for pointing out car front has car to break down, and please detour.Press failure warning switch 126, on radius 12 LED are glimmered simultaneously.And fixed support 127 can support chuck 120, makes chuck 120 to place in the horizontal plane.
In the present embodiment, fixed support 127 comprises two straight-line segments be parallel to each other and the bent intermediate section be connected with two straight-line segments respectively, and wherein, one end that two straight-line segments are not connected with bent intermediate section is flexibly connected with nave boss brace 110 respectively by pin 128.
Because fixed support 127 can be movable relative to nave boss brace 110, therefore, in the present embodiment, on the side of chuck 120 away from nave boss brace 110, and corresponding fixed support 127 center position is provided with locking mechanism 129, locking mechanism 129 is for the support 127 that is locked.When needs are used alone chuck 120, fixed support 127 is pulled out from locking mechanism 129.
As shown in Figure 1, self-powered module 200 is connected with speed of a motor vehicle sensing measurement module 300, signal processing module 400 respectively and LED 140 connects, and for speed of a motor vehicle sensing measurement module 300, signal processing module 400 connects and LED 140 is powered.Speed of a motor vehicle sensing measurement module 300 is connected with signal processing module 400, and speed of a motor vehicle sensing measurement module 300 is measured the speed information obtained, and passes to signal processing module 400.Signal processing module 400 accepts speed information, and controls LED unlatching according to speed information or close.
In the present embodiment, speed of a motor vehicle sensing measurement module 300 is Hall element or mercury cut-off, and its number of turns utilizing wheel to turn is carried out kind of pulse count calculation and gone out the speed of a motor vehicle.Signal processing module 400 also comprises flash cell (FLASH unit), if the speed of a motor vehicle exceedes curb-top speed, speed information can be stored in flash cell.
The specific works process of above-mentioned hypervelocity caution system 10 is as follows:
(1) when the vehicle is running, if the speed of a motor vehicle is within curb-top speed scope and (does not namely drive over the speed limit), speed information is communicated to signal processing module 400 by speed of a motor vehicle sensing measurement module 300, now can not open LED 140, and on chuck 120, LED system of battle formations case as shown in Figure 5.
(2) when Vehicle Speed exceedes curb-top speed, and when the speed of a motor vehicle exceeded is in 20% scope of max. speed, speed information is communicated to signal processing module 400 after analyzing by speed of a motor vehicle sensing measurement module 300, and speed information is stored in flash cell, 14 LED that signal processing module 400 controls in the first LED district 122 are opened, and ceaselessly glimmer, specifically as shown in Figure 7.
(3) when Vehicle Speed exceedes curb-top speed, and when the speed of a motor vehicle exceeded is within the scope of the 20%-50% of max. speed, speed information is communicated to signal processing module 400 after analyzing by speed of a motor vehicle sensing measurement module 300, and speed information is stored in flash cell, 28 LED that signal processing module 400 controls in the first LED district 122 and the second LED district 123 are opened, do not stop flicker, specifically as shown in Figure 8.
(4) when Vehicle Speed exceedes curb-top speed, and the speed of a motor vehicle exceeded is more than 50% of max. speed time, speed information is communicated to signal processing module 400 after analyzing by speed of a motor vehicle sensing measurement module 300, and speed information is stored in flash cell, 42 LED that signal processing module 400 controls in the first LED district 123 of LED district 122, second and the 3rd LED district 126 are opened, and ceaselessly glimmer, specifically as shown in Figure 9.
(5) after driver finds oneself hypervelocity, consciously carry out deceleration and make the speed of a motor vehicle get back to again in normal vehicle speed range, now, the LED in the first LED district 123 of LED district 122, second and the 3rd LED district 126 is all closed, and stops flicker, specifically as shown in Figure 5.Be recorded as hypervelocity in the flash cell of synchronous signal disposal system 400 once, if now press hypervelocity to check switch 125, a LED on fan-shaped radius will be glimmered (as shown in Figure 10), illustrates that this car once exceeded the speed limit once.If once more exceeded the speed limit, when getting back to normal vehicle speed range, in the flash cell of signal processing system 400, be recorded as hypervelocity twice, press hypervelocity and check that switch 125 will open two LED on fan-shaped radius automatically, and glimmer (as shown in figure 11) simultaneously.Same mode, if again exceeded the speed limit, just has more LED to glimmer.Thus the detailed process that in the whole process that above-mentioned hypervelocity caution system 10 can be travelled at vehicle, registration of vehicle is driven over the speed limit, be easy to traffic police or operation department monitoring vehicle overspeed situation.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. exceed the speed limit a caution system, it is characterized in that, comprise the hypervelocity warning dish for being arranged on vehicle hub and be placed in car sensing measurement module, signal processing module and the self-powered module in described hypervelocity warning dish;
Wherein, described hypervelocity warning dish comprises nave boss brace, chuck and LED, described nave boss brace is provided with the first threaded hole matched with the bolt on nave boss, and described first threaded hole coordinates with the bolt on described nave boss, for described nave boss brace is fixed on nave boss; Described chuck is fixed on described nave boss brace, and the cavity be formed between described chuck and described nave boss brace for accommodating described speed of a motor vehicle sensing measurement module, signal processing module and self-powered module, described LED is located on the side of described chuck away from described nave boss brace;
Described self-powered module is used for powering to described speed of a motor vehicle sensing measurement module, described signal processing module and described LED, described speed of a motor vehicle sensing measurement module passes to described signal processing module by measuring the speed information obtained, described signal processing module receives described speed information, and controls the unlatching of described LED according to described speed information or close.
2. hypervelocity caution system according to claim 1, is characterized in that, described chuck and the close side of described nave boss brace offer draw-in groove, and described nave boss brace is arranged in described draw-in groove.
3. hypervelocity caution system according to claim 2, it is characterized in that, the connecting portion that described nave boss brace comprises main part and is connected with described main part, described main part is discoid, described connecting portion comprises three spaced list structures, described list structure one end is connected with described main part, and described first threaded hole is located on the other end of described list structure; The cavity for accommodating speed of a motor vehicle sensing measurement module, signal processing module and self-powered module is formed between described chuck and described main part.
4. hypervelocity caution system according to claim 1, it is characterized in that, described hypervelocity warning dish also comprises warning valve snail bolt, and described nave boss brace centre is provided with the second threaded hole for being fixedly connected with described chuck, described chuck is provided with the 3rd threaded hole, and described chuck is fixed on described nave boss brace by described warning valve snail bolt, described second threaded hole and described 3rd threaded hole.
5. hypervelocity caution system according to claim 1, it is characterized in that, described chuck is discoid, described chuck comprises away from the side of described nave boss brace the sectorial lamp district that three central angles are 120 °, be respectively the first LED district, the second LED district and the 3rd LED district, whether described LED is that circular arc wire is arranged in described first LED district, the second LED district and the 3rd LED district, be used to indicate vehicle and exceed the speed limit and overspeed condition.
6. hypervelocity caution system according to claim 5, it is characterized in that, the center of circle of described chuck and the center of circle of the circular arc line formed with described LED lay respectively at the both sides of the circular arc line formed with described LED, and described first LED district, the second LED district and the 3rd LED district are equipped with the LED of 14 uniform intervals distributions.
7. whether hypervelocity caution system according to claim 5, is characterized in that, described LED is also located on described fan-shaped radius, be used to indicate the number of times of overspeed of vehicle or be used to indicate vehicle and break down.
8. hypervelocity caution system according to claim 7, it is characterized in that, the side of described chuck away from described nave boss brace is also provided with the hypervelocity be connected with described signal processing module and checks switch and the failure warning switch with described self-powered model calling, described hypervelocity checks that switch and failure warning switch run through described chuck.
9. the hypervelocity caution system according to claim 7 or 8, is characterized in that, the side that described chuck is fixedly connected with described nave boss brace is also provided with fixed support, and described fixed support is flexibly connected with described nave boss brace by pin.
10. hypervelocity caution system according to claim 9, it is characterized in that, on the side that described chuck is fixedly connected with described nave boss brace, and corresponding described fixed support center position is provided with locking mechanism, and described locking mechanism is for locking described fixed support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310239756.7A CN104240519B (en) | 2013-06-17 | 2013-06-17 | Hypervelocity caution system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310239756.7A CN104240519B (en) | 2013-06-17 | 2013-06-17 | Hypervelocity caution system |
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| CN104240519A true CN104240519A (en) | 2014-12-24 |
| CN104240519B CN104240519B (en) | 2016-08-10 |
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| CN201310239756.7A Active CN104240519B (en) | 2013-06-17 | 2013-06-17 | Hypervelocity caution system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107592706A (en) * | 2017-10-12 | 2018-01-16 | 中建交通建设集团有限公司 | The illuminating energy-saving controller in tunnel in shield-tunneling construction |
| CN110276961A (en) * | 2019-05-23 | 2019-09-24 | 南京理工大学 | The multi-party method for early warning of overspeed of vehicle dangerous driving in special area |
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| CN110276961A (en) * | 2019-05-23 | 2019-09-24 | 南京理工大学 | The multi-party method for early warning of overspeed of vehicle dangerous driving in special area |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104240519B (en) | 2016-08-10 |
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