CN204821399U - Condition is kept watch on and warning device behind car - Google Patents
Condition is kept watch on and warning device behind car Download PDFInfo
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- CN204821399U CN204821399U CN201520311150.4U CN201520311150U CN204821399U CN 204821399 U CN204821399 U CN 204821399U CN 201520311150 U CN201520311150 U CN 201520311150U CN 204821399 U CN204821399 U CN 204821399U
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Abstract
The utility model relates to a condition is kept watch on and warning device behind car. Condition monitoring arrangement behind the car includes: the image acquisition device, its image of installing the condition after the car is gathered to the rear of a vehicle, and central control unit, it confirms the existence of back car according to coming from behind the car of image acquisition device the image of the condition. Warning device further includes alarm device, wherein, central control unit according to around when under the car speed of a motor vehicle this car after and the distance between the car whether be less than or equal to predetermined threshold value instruction alarm device and send the alarm. The technical scheme of the utility model the car future plan that obtains through the image acquisition device installed at the rear of a vehicle through image identification technology like, the condition behind the car is kept watch on to the existence of car and the speed of back car behind the automatic identification, and can send the alarm according to the risk that takes place the rear -end collision to can reduce the risk that the emergence was knocked into the back.
Description
Technical field
The utility model relates to a kind of field of vehicle safety, and particularly after a kind of car, situation monitors and alarming device.
Background technology
Along with expanding economy, the quantity of vehicle continues to increase, and the quantity of car accident is also in increase.Wherein, the most common accident is exactly " knocking into the back ".The reason of " knocking into the back " accident is caused mainly to be the hypotelorism of rear car and front truck and the excessive velocities of rear car.A method of minimizing " knocking into the back " accident is exactly the situation after can monitoring car in time, and provides warning to rear car driver, makes rear car driver can maintain safe distance and reduce the speed of a motor vehicle.
Utility model content
For the technical matters existed in prior art, the utility model proposes situation monitoring device after a kind of car, comprising: image collecting device, it is installed on the tailstock, gathers the image of situation after car; And central control unit, it is according to the existence from the image determination rear car of situation after the car of image collecting device; Wherein, central control unit comprises the Car license recognition module for identifying from car plate in the image of situation after the car of image collecting device; And the speed of a motor vehicle identification module of the position calculation rear car speed of a motor vehicle of the tailstock is installed on according to the size of the car plate in the image from situation after the continuous print car of image collecting device and change in location and image collecting device.
Situation monitoring device after car as above, central control unit comprises the supplementary module identified from the wheel in the image of situation after the car of image collecting device or chaufeur further.
Situation monitoring device after car as above, comprises speed measuring device further.
Situation monitoring device after car as above, comprises laser rangefinder further, and it is connected to central control unit.
Situation monitoring device after car as above, wherein image collecting device is connected to the read-out of operator's compartment further.
According to another aspect of the present utility model, propose a kind of alarming device, comprising: situation monitoring device after car as above; And according to the warning device that the instruction whether this car distance with the rear car under the central control unit current rear car speed of a motor vehicle is less than or equal to predetermined threshold value gives the alarm.
Alarming device as above, described warning device comprises:
Light warning part, under its current rear car speed of a motor vehicle, this car distance is with the rear car less than or equal to when predetermined threshold value is greater than 80% of described threshold value and is given the alarm by the luminescence or color changing car light;
Word alarm portion, under its current rear car speed of a motor vehicle, this car distance is with the rear car less than or equal to when predetermined threshold value 80% is greater than 40% of described threshold value and is given the alarm by word; And
Audible alarm part, is given the alarm loudly by sound when under its current rear car speed of a motor vehicle, this car distance is with the rear car less than or equal to predetermined threshold value 40%.
Alarming device as above, central control unit and image collecting device are connected to the Train-borne recorder whether being less than or equal to predetermined threshold value startup according to this car distance with the rear car under the current rear car speed of a motor vehicle.
Image after the car that the technical solution of the utility model is obtained by the image collecting device being arranged on the tailstock by image recognition technology, automatically identifies the existence of rear car and the speed of rear car, monitors the situation after car; And can give the alarm according to the risk that rear-end collision occurs, thus the risk knocked into the back can be reduced.
Accompanying drawing explanation
Below, will be described in more detail preferred implementation of the present utility model by reference to the accompanying drawings, wherein:
Fig. 1 is the structural representation of the alarming device according to an embodiment of the present utility model; And
Fig. 2 is the schematic diagram given the alarm according to the alarming device of an embodiment of the present utility model.
Detailed description of the invention
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In the following detailed description, can referring to each Figure of description as a part of specific embodiment being used for that the application is described of the application.In the accompanying drawings, similar Reference numeral describes assembly similar substantially in different drawings.Each specific embodiment of the application has carried out enough detailed description following, makes the those of ordinary skill possessing this area relevant knowledge and technology can implement the technical scheme of the application.Should be appreciated that and can also utilize other embodiment or structure, logic or electrical change are carried out to the embodiment of the application.
It will be appreciated by those skilled in the art that if do not comprise warning device in device of the present utility model, then become independently situation monitoring device after car; If device of the present utility model comprises warning device, then become independently alarming device.In the embodiment of alarming device, unification is described herein, distinguishes no longer in detail.
Fig. 1 is the structural representation of the alarming device according to an embodiment of the present utility model.With reference to figure 1, alarming device 100 comprises central control unit 101, image collecting device 102 and warning device 103; Wherein image collecting device 102 and warning device 103 are connected respectively to central control unit 101.According to an example of the present utility model, image collecting device 102 is generally arranged on the tailstock, for the image of collection vehicle last case.According to an example of the present utility model, image collecting device 102 with the image of fixed time interval continuous acquisition vehicle back, and sends images to central control unit 101.Central control unit 101 identifies rear car from each image, and draws the speed of distance between rear car and this car and rear car further, and then judge under the speed of a motor vehicle of current rear car, whether this car distance is with the rear car less than or equal to predetermined threshold value; And whether be less than or equal to predetermined threshold value in response to the distance between front car and rear car, central control unit 101 indicating alarm device 103 proposes alarm to the chaufeur of this car or rear car.
Central control unit 101 can be implemented in the mode of hardware or software and realize the controlling functions relevant with the utility model.Such as, central control unit 101 can comprise the software relevant with the utility model that treater and this treater run, or comprises the hardware with firmware.Image collecting device 102 can be the various hardware units going for scheme of the present utility model, includes but not limited to various photographic camera, pick up camera, imageing sensor etc.According to an example of the present utility model, image collecting device 102 comprises infrared or low-light pattern, uses in night to facilitate.The software that warning device 103 also can be various types of hardware unit and be mated, proposes to warn with word, sound, light, color or its combination chaufeur to chaufeur or rear car.
The key determining whether there is the risk knocked into the back is to measure this car distance with the rear car and the rear car speed relative to this car.The mode using the mode of laser rangefinder to judge this car distance is with the rear car there is in prior art.The technical solution of the utility model also can adopt laser rangefinder scheme as a supplement.Such as, as shown in Figure 1, alarming device 100 can comprise laser ranging system 104, such as laser rangefinder.The measurement of laser ranging system 104 has very high precision, but but has the problem that cost height and reliability cannot ensure.If rear car exists geographic restrictions such as reflecting not good or that position is not good situation or bend, laser ranging system 104 may not play a role.This is also a reason that laser ranging system 104 cannot be utilized to carry out spacing and vehicle speed measurement.Therefore, for scheme of the present utility model, laser ranging system 104 is optional.Similarly, also there is the expensive knotmeter of use in prior art and measure the speed of rear car relative to this car.But knotmeter reliability is not high equally, and installation and maintenance is also cumbersome.Therefore, seldom adopt in practice.
Even if when there is not apomecometer and knotmeter, the utility model by the Distance geometry relative velocity between image recognition technology determination rear car and this car, thus is estimated the possibility of " knocking into the back " and sends indicating alarm.According to an embodiment of the present utility model, central control unit 101 after receiving the consecutive image from image collecting device 102, the rear car in recognition image; And draw the Ben Che speed of a motor vehicle relative to rear car Distance geometry according to the change of rear car in consecutive image.For example, image collecting device 102 interval at a fixed time, such as 1 second or 0.5 second or shorter time, this car of continuous acquisition multiple images below.Central control unit 101 receives the multiple image of continuous print, from each image, identify one or more rear car.Then, the distance of rear car apart from this car and the speed of rear car is determined according to rear car change in the picture.Next, central control unit 101 determines whether this car distance is with the rear car less than or equal to predetermined threshold value, and indicating alarm device 103 gives the alarm accordingly.
The first problem that the utility model faces how to identify rear car.Because vehicle type is a lot, identifies and get up to have very high difficulty.According to an example of the present utility model, central control unit 101 comprises Car license recognition module 110.Car plate in the image that Car license recognition module 110 is gathered by recognition image harvester 102 identifies rear car.Although the type of vehicle is a lot, the car plate of all vehicles is all standard, and therefore discrimination is very high.By technology such as image compensations, can accomplish outside far distance in prior art, identify the car plate of automobile exactly.Further, in some embodiment of the present utility model, and the content of car plate need not be identified completely.As long as identify the existence of car plate, just rear car can be identified exactly.Further, image collecting device 102 can have wide-angle view, covers rear cars all in this car very large scope below.Like this, central control unit 101 just can identify multiple car plate simultaneously, thus determines the existence of multiple rear car.
According to an example of the present utility model, central processing unit also can comprise supplementary module (not shown), and employing other technologies means are independent or jointly use with Car license recognition module, solve the problem of rear car identification better.Specifically, other technological means of supplementary module comprises: by wheel in recognition image and/or by identifying that the mode such as chaufeur of rear car carrys out the existence of rear car.According to an example of the present utility model, such as the result of a measurement of the equipment such as laser rangefinder or vehicle mounted infrared device also can combine with the result of image recognition and determine the existence of rear car.According to an example of the present utility model, outside the safety distance that may knock into the back, central control unit 101 of the present utility model just can identify the existence of rear car exactly.
How another problem that the utility model faces, after identifying rear car, determines the speed of a motor vehicle of the Distance geometry rear car of this car and rear car.According to an example of the present utility model, central control unit 101 comprises speed of a motor vehicle identification module 111.Speed of a motor vehicle identification module 111 is on the basis of car plate identifying rear car, and the installation site according to car plate size in the picture and position and this car epigraph harvester 102 just can calculate this car distance with the rear car exactly.Because car plate is standard, in single image, namely just can calculate the change of rear car relative to the distance of this car easily by the change of the distance with the rear car of this car in consecutive image, thus draw relative velocity therebetween.According to an example of the present utility model, because the between-wheel spacing of most of vehicle is greatly before 2.5-3 rice, speed of a motor vehicle identification module 111, by the spacing between the wheel of rear car in recognition image and wheel, also can estimate profit and use the same method and estimate this car distance with the rear car.Similarly, this car distance with the rear car can also be estimated by chaufeur in recognition image.So also can estimate the relative velocity of rear car relative to this car relatively accurately.According to an example of the present utility model, above-mentioned multiple method of estimation can conbined usage, to improve accuracy.According to an example of the present utility model, such as the result of a measurement of the equipment such as laser rangefinder or vehicle mounted infrared device also can combine with the result of image recognition and determine the Distance geometry relative velocity of rear car relative to this car.
Central control unit comprises warning decision-making module 112 further.According to the risk knocked into the back, warning decision-making module 112 determines that indicating alarm device 103 gives the alarm.
According to an embodiment of the present utility model, come to estimate the risk knocked into the back by safety distance.Such as, after current vehicle is braked suddenly, rear car is the unlikely distance bumping against front truck thereupon braking, i.e. safety distance.Below the object only for illustrating illustrates how to draw safety distance.
Table 1
Table 1 is the reaction distance that obtains of differential responses time under the different speed of a motor vehicle.
Table 2
Table 2 is that different coefficient of road adhesions and the different speed of a motor vehicle obtain different reaction distances.
Generally speaking, time of driver's reaction is 0.3-1 second, and the braking time of drg is 0.2-0.8 second.The two addition can be drawn the reaction distance of rear car by distance again that utilize table 1 can show that the braking time of time of driver's reaction and drg is corresponding respectively.And the stopping distance after braking can be drawn by table 2.The reaction distance of rear car and stopping distance are added the safety distance that just can draw actual needs.
According to an example of the present utility model, if rear car is full size vehicle, the judgment mode of simple " distance+speed " may be inaccurate not.According to an example of the present utility model, by identifying that the color of word in car plate and car plate judges the type of rear car.Then, when computationally secure distance, consider the car weight of rear car and suitably extend required safety distance.Such as, if rear car is full size vehicle, safety distance can extend 20%-50%, and preferably 35%.The mode of this employing " rear car type+distance+speed ", can improve alarm accuracy to a great extent, ensures traffic safety.
Another common problem that existing warning device exists is frequent warning, causes interference.According to an embodiment of the present utility model, warning decision-making module 112, according to the height of the risk that knocks into the back, adopts the mode indicating alarm device 103 of multiple levels of alert to propose to report to the police.
Fig. 2 is the schematic diagram that after the car according to an embodiment of the present utility model, situation monitors and alarming device gives the alarm.As shown in Figure 2, and with reference to figure 1, warning device 103 comprises light warning part, word alarm portion and/or audible alarm part.The threshold value of the corresponding different stage of different alarm portion.According to an embodiment of the present utility model, first order threshold value expresses possibility risky, and light warning part changes color or the light-emitting mode of tailstock portion light or other light parts, prompting rear car; Second stage threshold value table is shown with risk, and word alarm portion ejects LED display, uses text prompt rear car; Third stage threshold value represents and does not take immediate steps and can cause danger, the large acoustic alarm of audible alarm part sound.
According to an example of the present utility model, determine according to the relation between this car actual distance with the rear car and safety distance the rank carrying out definite threshold.Such as, if this car actual distance with the rear car and safety distance, without the need to reporting to the police; If this car actual distance with the rear car safety distance 80% and safety distance between, then show to exceed first order threshold value; If this car actual distance with the rear car safety distance 40% and safety distance between 80%, then show to exceed second stage threshold value; If this car actual distance be with the rear car less than safety distance 40%, then show to exceed third stage threshold value.It will be appreciated by those skilled in the art that above threshold level is only in the object of citing.Other mode also can be applied in scheme of the present utility model.Thus, type of alarm of the present utility model had both improve the accuracy of warning, also can not disturb user owing to frequently using the prompting modes such as acousto-optic.
According to an example of the present utility model, after having an accident, judge difficult burden, image collecting device 102 of the present utility model is connected to Train-borne recorder 105 automatically to record the situation after car.Such as, when central control unit 101 exceedes first order threshold value or second stage threshold value or third stage threshold value, automatically start Train-borne recorder 105 and record the image or video that image collecting device 102 obtains.
According to another example of the present utility model, the read-out that image collecting device of the present utility model also can be connected to operator's compartment uses for during reversing.Such as, when central control unit 101 finds that vehicle is in state of rolling backward, then image collecting device is set in image pickup mode and by obtain video stream on the read-out of operator's compartment, thus replace reverse image.
Above-described embodiment is only for illustration of the utility model, and be not to restriction of the present utility model, the those of ordinary skill of relevant technical field, when not departing from the utility model scope, can also make a variety of changes and modification, therefore, all equivalent technical schemes also should belong to category disclosed in the utility model.
Claims (8)
1. a situation monitoring device after car, is characterized in that, comprising:
Image collecting device, it is installed on the tailstock, the image of situation after collection car; And
Central control unit, it is according to the existence from the image determination rear car of situation after the car of image collecting device; Wherein, described central control unit comprises the Car license recognition module for identifying from car plate in the image of situation after the car of image collecting device; And the speed of a motor vehicle identification module of the position calculation rear car speed of a motor vehicle of the tailstock is installed on according to the size of the car plate in the image from situation after the continuous print car of image collecting device and change in location and image collecting device.
2. situation monitoring device after car according to claim 1, is characterized in that, central control unit comprises the supplementary module identified from the wheel in the image of situation after the car of image collecting device or chaufeur further.
3. situation monitoring device after car according to claim 1, is characterized in that, comprise speed measuring device further.
4. situation monitoring device after car according to claim 1, is characterized in that, comprise laser rangefinder further, it is connected to central control unit.
5. situation monitoring device after car according to claim 1, is characterized in that, wherein image collecting device is connected to the read-out of operator's compartment further.
6. an alarming device, is characterized in that, comprising:
As situation monitoring device after the car as described in arbitrary in claim 1-5; And
The warning device that the instruction whether being less than or equal to predetermined threshold value according to this car distance with the rear car under the central control unit current rear car speed of a motor vehicle gives the alarm.
7. alarming device according to claim 6, is characterized in that, described warning device comprises:
Light warning part, under its current rear car speed of a motor vehicle, this car distance is with the rear car less than or equal to when predetermined threshold value is greater than 80% of described threshold value and is given the alarm by the luminescence or color changing car light;
Word alarm portion, under its current rear car speed of a motor vehicle, this car distance is with the rear car less than or equal to when predetermined threshold value 80% is greater than 40% of described threshold value and is given the alarm by word; And
Audible alarm part, is given the alarm loudly by sound when under its current rear car speed of a motor vehicle, this car distance is with the rear car less than or equal to predetermined threshold value 40%.
8. alarming device according to claim 7, is characterized in that, central control unit and image collecting device are connected to the Train-borne recorder whether being less than or equal to predetermined threshold value startup according to this car distance with the rear car under the current rear car speed of a motor vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520311150.4U CN204821399U (en) | 2015-05-15 | 2015-05-15 | Condition is kept watch on and warning device behind car |
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| CN201520311150.4U CN204821399U (en) | 2015-05-15 | 2015-05-15 | Condition is kept watch on and warning device behind car |
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Cited By (13)
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| CN105946710A (en) * | 2016-04-29 | 2016-09-21 | 孙继勇 | Traveling auxiliary device |
| CN105984407A (en) * | 2015-05-15 | 2016-10-05 | 李俊 | Monitoring and warning device for condition behind vehicle |
| CN106004661A (en) * | 2016-05-31 | 2016-10-12 | 百度在线网络技术（北京）有限公司 | Outside rear-view mirror system and method applied to same |
| CN106080381A (en) * | 2016-07-22 | 2016-11-09 | 纳瓦电子（上海）有限公司 | A kind of early warning system of automobile anti-rear end collision based on image recognition detection |
| CN107180294A (en) * | 2016-03-10 | 2017-09-19 | 福特全球技术公司 | System and method for driving risk index estimation |
| CN107545612A (en) * | 2016-06-23 | 2018-01-05 | 戚艳红 | Make video recording startup method and the activation system of making video recording of a kind of drive recorder |
| WO2018018344A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Information prompt method for preventing vehicle rear-end collision according to vehicle speed, and brake light system |
| WO2018018346A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Method for acquiring the number of usage times of vehicle rear-end collision-proof technique, and brake light system |
| WO2018018345A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Method for preventing vehicle rear-end collision according to vehicle speed, and brake light system |
| WO2018018343A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Data collection method for rear-end collision early-warning technology, and brake light system |
| WO2018018347A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Information prompt method for warning of vehicle rear-end collision, and brake light system |
| WO2018018348A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Method for preventing vehicle rear-end collision, and brake light system |
| CN110517613A (en) * | 2019-09-06 | 2019-11-29 | 李良杰 | Remote control security warning sign |
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| CN105984407B (en) * | 2015-05-15 | 2018-09-25 | 李俊 | Situation monitoring and alarming device after a kind of vehicle |
| CN105984407A (en) * | 2015-05-15 | 2016-10-05 | 李俊 | Monitoring and warning device for condition behind vehicle |
| CN107180294A (en) * | 2016-03-10 | 2017-09-19 | 福特全球技术公司 | System and method for driving risk index estimation |
| CN105946710A (en) * | 2016-04-29 | 2016-09-21 | 孙继勇 | Traveling auxiliary device |
| CN106004661A (en) * | 2016-05-31 | 2016-10-12 | 百度在线网络技术（北京）有限公司 | Outside rear-view mirror system and method applied to same |
| CN107545612A (en) * | 2016-06-23 | 2018-01-05 | 戚艳红 | Make video recording startup method and the activation system of making video recording of a kind of drive recorder |
| CN106080381A (en) * | 2016-07-22 | 2016-11-09 | 纳瓦电子（上海）有限公司 | A kind of early warning system of automobile anti-rear end collision based on image recognition detection |
| WO2018018344A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Information prompt method for preventing vehicle rear-end collision according to vehicle speed, and brake light system |
| WO2018018345A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Method for preventing vehicle rear-end collision according to vehicle speed, and brake light system |
| WO2018018343A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Data collection method for rear-end collision early-warning technology, and brake light system |
| WO2018018347A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Information prompt method for warning of vehicle rear-end collision, and brake light system |
| WO2018018348A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Method for preventing vehicle rear-end collision, and brake light system |
| WO2018018346A1 (en) * | 2016-07-24 | 2018-02-01 | 段春燕 | Method for acquiring the number of usage times of vehicle rear-end collision-proof technique, and brake light system |
| CN110517613A (en) * | 2019-09-06 | 2019-11-29 | 李良杰 | Remote control security warning sign |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Mudanjiang Plasma Application Of Physical Technology Co., Ltd. Assignor: Li Jun Contract record no.: 2016230000006 Denomination of utility model: Monitoring and warning device for condition behind vehicle Granted publication date: 20151202 License type: Common License Record date: 20160406 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20160515 |