CN104200542A

CN104200542A - Vehicle pre-warning method, vehicle pre-warning device, terminal and travelling data recorder

Info

Publication number: CN104200542A
Application number: CN201410494502.4A
Authority: CN
Inventors: 丁健鹏
Original assignee: XI'AN KUPAI SOFTWARE TECHNOLOGY Co Ltd
Current assignee: XI'AN KUPAI SOFTWARE TECHNOLOGY Co Ltd
Priority date: 2014-09-24
Filing date: 2014-09-24
Publication date: 2014-12-10

Abstract

The invention discloses a vehicle pre-warning method, a vehicle pre-warning device, a terminal and a travelling data recorder. The vehicle pre-warning method comprises the steps as follows: according to a received acquisition command, an image of an obstacle in any direction of a vehicle is acquired by a camera device of the terminal or the travelling data recorder; according to the size and/or change condition of the image of the obstacle, the motion state parameter of the obstacle is determined; and according to the motion state parameter of the obstacle, a pre-warning signal is sent. According to the technical scheme, the motion state of the obstacle can be calculated according to the size and the change condition of the image of the obstacle around the vehicle, and the pre-warning signal is sent to a user according to the motion state of the obstacle, so that the user can adjust the driving state of the vehicle according to the pre-warning signal, the safety of the vehicle travelling is improved, the danger caused by the fact that the user is distracted to observe the road conditions of other directions besides the front during driving is further avoided, and the personal safety of the user is guaranteed.

Description

Vehicle early warning method, vehicle early warning device, terminal and drive recorder

Technical field

The present invention relates to technical field of image processing, in particular to a kind of vehicle early warning method, a kind of vehicle early warning device, a kind of terminal and a kind of drive recorder.

Background technology

In existing technical scheme, can utilize the road conditions of the post-positioned pick-up head shooting vehicle front of mobile device, make mobile device play the effect of drive recorder.But, this technical scheme has just been utilized the shoot function of camera, need user to check that voluntarily the image of shooting judges road conditions, and judge whether voluntarily take safety measures, and cannot utilize mobile device according to the image that photographs, to remove the concrete kinematic parameter etc. of dyscalculia thing, thereby cannot realize the function of automatic early-warning.

In existing technical scheme, can also pass through the distance of the front things of the inspection vehicles such as laser, ultrasound wave, infrared ray, as lane detection, vehicle detection, pedestrian detection etc., and warn according to testing result.But although this technical scheme has Preliminary detection function, the scope of its detection is only confined to the vehicle front that user pays close attention to constantly, and its measuring ability is limited, cannot be in time and accurately judge the concrete kinematic parameter of the barrier in the place ahead.

In addition, above-mentioned prior art scheme is not all carried out the pre-judgement of state variation to its detected object, not that is to say the velocity variations of detected object is calculated, also just cannot judge the especially movement tendency of back car of detected object, thereby cannot provide early warning signal to user, and user tends to ignore the rear road conditions of seldom paying close attention to, thereby cause the security of Vehicle Driving Cycle lower, cannot guarantee user's personal safety.

Therefore, need a kind of new technical scheme, can detect the concrete motion state of the barrier of rear view of vehicle, initiatively send early warning signal.

Summary of the invention

The present invention, just based on the problems referred to above, has proposed a kind of new technical scheme, can detect the concrete motion state of the barrier of rear view of vehicle, initiatively sends early warning signal.

In view of this, the present invention proposes a kind of vehicle early warning method, comprising: according to the order of obtaining receiving, use the camera head of terminal or drive recorder to obtain the image of barrier of the either direction of vehicle; According to the size of the image of described barrier and/or situation of change, determine the motion state parameters of described barrier; Motion state parameters according to described barrier, sends early warning signal.

In this technical scheme, first, utilize the camera of terminal or drive recorder to obtain the image of barrier of the either direction of vehicle, then terminal or drive recorder can utilize the method that focal length converts, according to the size of the image of the barrier of the either direction of vehicle and/or situation of change, calculate the motion state parameters of barrier, and to user, send early warning according to the motion state parameters of barrier, thereby so that user can adjust according to early warning signal the transport condition of vehicle.Such as, according to the size of the image of sending a car of rear view of vehicle, by methods such as focal length conversions, can rough calculation go out the distance of rear car and vehicle, when the distance of rear car and vehicle is less than secure threshold, can send early warning signal to user.For another example, when the image of sending a car of rear view of vehicle has increased N doubly and sidesway has occurred, can directly send early warning signal, call user's attention rear car is being accelerated, the method that can also convert by focal length calculate rear car travel speed, the motion state parameterses such as acceleration travel, and send early warning signal according to these motion state parameterses, thereby make user brake slowly or to give way for front vehicle according to early warning signal.By this technical scheme, the security of can lifting vehicle travelling, the danger of having avoided user to observe the road conditions in other directions beyond the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

In the prior art, there is several different methods can detect the speed of distance between camera and mobile object and mobile object.Such as, the method that can use focal length to convert, in the present invention, particularly, can metric lattice be set in image display area, by metric lattice, determine the size of subject image, can, by the tailstock as object of reference, by following formula, calculate the distance of camera and barrier simultaneously:

L＝d+k×M

Wherein, L is the distance of camera and barrier, and d is the distance of camera and the tailstock, and k is focal length substitution ratio, represents the big or small proportionate relationship of camera and the distance of barrier and the image of barrier, the size of the image that M is barrier.

For another example, the Smart Distance Pro (smart distance measurement) of developer Smart Tools co exploitation, for measuring the speed of the camera of mobile phone and the distance between mobile object and mobile object, its finding range reaches as high as 1000m, be applicable to the operating system of Android 2.2 and above version thereof, Smart Distance Pro can be according to the measuring command receiving, measure mobile object speed or with the distance of mobile object, wherein, measuring command can be the touch-control of arbitrary position of image that camera is obtained, by the object in touch screen, can obtain the speed of this object or the distance of terminal and this object.

In technique scheme, preferably, also comprise: described in receiving, obtain order, obtain the travel speed of described vehicle; And according to the travel speed of the size of the image of described barrier and/or situation of change and described vehicle, determine the described motion state parameters of described barrier.

In this technical scheme, when Vehicle Speed is too fast or when excessive with the relative travel speed of barrier, only rely on image size and the variation thereof of barrier, the accurate motion state parameters of disturbance in judgement thing, also just cannot guarantee the security of Vehicle Driving Cycle, therefore, can also use GPS or from the speed counter of vehicle, obtain the travel speed of vehicle, image size and the variation thereof of the travel speed of vehicle and barrier are combined, the motion state parameters of disturbance in judgement thing more accurately, thereby greatly increased the security of Vehicle Driving Cycle.Such as, when the image of sending a car of rear view of vehicle has increased N doubly and sidesway has occurred, by the GPS of terminal or drive recorder, obtain the travel speed of vehicle, acceleration travels, the method converting by focal length calculates the travel speed of rear car, acceleration travels, and according to both travel speeds, the acceleration that travels is determined both relative travel speeds and the relative acceleration that travels, in addition, can also further determine both movement tendency and relative motion trend, and send early warning signal according to these motion state parameterses of determining, thereby make user brake slowly or to give way for front vehicle according to early warning signal.By this technical scheme, the motion state parameters of disturbance in judgement thing more accurately, promoted the security of Vehicle Driving Cycle, the danger of certainly also having avoided user to observe the road conditions in other directions in addition of the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

In technique scheme, preferably, described according to the motion state parameters of described barrier, send early warning signal, specifically comprise: determine that the described motion state parameters of described barrier is whether in predetermined safe range, wherein, when described motion state parameters is not during in described predetermined safe range, send described early warning signal.

In this technical scheme, secure threshold or safe range can be set for the motion state parameters of barrier, and determine the opportunity of sending early warning signal according to secure threshold or safe range, and send early warning signal.Such as, the safe range of travel speed of rear car is set for being less than 70 kilometers per hour, the secure threshold that the travel speed of rear car is namely set is 70 kilometers per hour, when determining that the travel speed of rear car is 80 kilometers per hour, can send early warning signal to user, with reminding user, avoid rear car, guarantee the safety of self.

In technique scheme, preferably, described motion state parameters comprise following at least one or a combination set of: the real-time distance of described barrier and described vehicle and/or mean distance in the given time; Described barrier and the real-time relative travel speed of described vehicle and/or average relative travel speed in the given time; The real time running speed of described barrier and/or average overall travel speed in the given time; The real time running acceleration of described barrier and/or the acceleration that on average travels in the given time; And described early warning signal comprise following at least one or a combination set of: text signal, picture signal, voice signal.

In this technical scheme, the motion state parameters of barrier include but not limited to following at least one or a combination set of: real-time relative travel speed, barrier and the vehicle of real-time distance, barrier and the vehicle of barrier and vehicle mean distance, barrier and vehicle in the given time average relative travel speed, the real time running speed of barrier, barrier average overall travel speed, the real time running acceleration of barrier, the barrier acceleration that on average travels in the given time in the given time in the given time.In addition, early warning signal include but not limited to following at least one or a combination set of: text signal, picture signal, voice signal, such as, when determining that the travel speed of rear car surpasses secure threshold, can be in the travel speed value of the demonstration screen display rear car of terminal or drive recorder, or the signal language of demonstration " rear car travel speed is too fast, woulds you please take care "; Also can use voice to carry out early warning, play the voice of " rear car travel speed is too fast, woulds you please take care "; Can also there is " danger at mark of demonstration screen display of terminal or drive recorder! " picture cause user's concern.Multiple different early warning signal can be used respectively, also can be used in combination, and the object taking safety measures to reach timely reminding user, has increased the security of Vehicle Driving Cycle, has guaranteed user's personal safety.

In technique scheme, preferably, also comprise: according to predetermined ratio, image shows region is divided into safety zone and non-security region; And the position of the image that detects described barrier in described image shows region, wherein, when detecting that the image of described barrier is arranged in or part is positioned at described non-security region, send described early warning signal.

In this technical scheme, can be division safety zone, image shows region and the non-security region on terminal or drive recorder according to predetermined ratio, when the image of barrier exceeds safety zone, illustrate that vehicle is on the relative position with barrier no longer safe, there is certain danger, now, can send early warning signal, the reminding user safety practice such as take to brake, give way.Such as, a macroscopic red caution frame can be set in image display area, when the image that barrier detected when terminal or drive recorder exceeds caution frame, can assert that current position is dangerous, and then send early warning signal.In addition, also the image of barrier can be exceeded to caution frame itself and regard one type as for the early warning signal of picture signal, user is according to this early warning signal observing safety practice such as can take to brake, give way.

Another aspect of the present invention has proposed a kind of vehicle early warning device, comprising: acquiring unit, according to the order of obtaining receiving, is used the camera head of terminal or drive recorder to obtain the image of barrier of the either direction of vehicle; Determining unit, according to the size of the image of described barrier and/or situation of change, determines the motion state parameters of described barrier; Prewarning unit, the motion state parameters according to described barrier, sends early warning signal.

In this technical scheme, first, utilize the camera of terminal or drive recorder to obtain the image of barrier of the either direction of vehicle, then terminal or drive recorder can utilize the method that focal length converts, according to the size of the image of the barrier of the either direction of vehicle and/or situation of change, calculate the motion state parameters of barrier, and to user, send early warning according to the motion state parameters of barrier, thereby so that user can adjust according to early warning signal the transport condition of vehicle.Such as, according to the size of the image of sending a car of rear view of vehicle, the method converting by focal length can rough calculation goes out the distance of rear car and vehicle, when the distance of rear car and vehicle is less than secure threshold, can send early warning signal to user.For another example, when the image of sending a car of rear view of vehicle has increased N doubly and sidesway has occurred, can directly send early warning signal, call user's attention rear car is being accelerated, the method that can also convert by focal length calculate rear car travel speed, the motion state parameterses such as acceleration travel, and send early warning signal according to these motion state parameterses, thereby make user brake slowly or to give way for front vehicle according to early warning signal.By this technical scheme, the security of can lifting vehicle travelling, the danger of having avoided user to observe the road conditions in other directions beyond the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

In technique scheme, preferably, described acquiring unit also for: described in receiving, obtain order, obtain the travel speed of described vehicle; And described determining unit also for: according to the travel speed of the size of the image of described barrier and/or situation of change and described vehicle, determine the described motion state parameters of described barrier.

In technique scheme, preferably, described prewarning unit specifically for: determine that the described motion state parameters of described barrier is whether in predetermined safe range, wherein, when described motion state parameters is not during in described predetermined safe range, send described early warning signal.

In technique scheme, preferably, also comprise: division unit, according to predetermined ratio, is divided into safety zone and non-security region by image shows region; And described prewarning unit also for: detect the image of described barrier in the position in described image shows region, wherein, when detecting that the image of described barrier is arranged in or part is positioned at described non-security region, send described early warning signal.

One side more of the present invention has proposed a kind of terminal, includes the vehicle early warning device described in technique scheme.Therefore, this terminal has whole beneficial effects of the vehicle early warning device that technique scheme provides, and does not repeat them here.

Also one side of the present invention has proposed a kind of drive recorder, includes the vehicle early warning device described in technique scheme.Therefore, this drive recorder has whole beneficial effects of the vehicle early warning device that technique scheme provides, and does not repeat them here.

By above technical scheme, can be according to the size of the image of the barrier of vehicle periphery and situation of change, the motion state of dyscalculia thing, and to user, send early warning according to the motion state of barrier, thereby make user can adjust according to early warning signal the transport condition of vehicle, the security that lifting vehicle travels, the danger of also having avoided user to observe the road conditions in other directions in addition of the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

Accompanying drawing explanation

Fig. 1 shows the process flow diagram of vehicle early warning method according to an embodiment of the invention;

Fig. 2 shows the process flow diagram of vehicle early warning method according to another embodiment of the invention;

Fig. 3 shows the block diagram of vehicle early warning device according to an embodiment of the invention;

Fig. 4 shows the block diagram of terminal according to an embodiment of the invention;

Fig. 5 shows the block diagram of drive recorder according to an embodiment of the invention;

Fig. 6 A to Fig. 6 D shows the schematic diagram of the image of the back car that terminal according to an embodiment of the invention or drive recorder obtain.

Embodiment

In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, in the situation that not conflicting, the application's embodiment and the feature in embodiment can combine mutually.

A lot of details have been set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.

Fig. 1 shows the process flow diagram of vehicle early warning method according to an embodiment of the invention.

As shown in Figure 1, vehicle early warning method according to an embodiment of the invention, comprises the following steps:

Step 102, according to the order of obtaining receiving, is used the camera head of terminal or drive recorder to obtain the image of barrier of the either direction of vehicle.

Step 104, according to the size of the image of barrier and/or situation of change, determines the motion state parameters of barrier.

Step 106, the motion state parameters according to barrier, sends early warning signal.

In the prior art, there is several different methods can detect the speed of distance between camera and mobile object and mobile object.Such as, the method that the focal length of mentioning in technique scheme converts, in the present invention, particularly, can metric lattice be set in image display area, by metric lattice, determine the size of subject image, can, by the tailstock as object of reference, by following formula, calculate the distance of camera and barrier simultaneously:

L＝d+k×M

In technique scheme, preferably, also comprise: according to the order of obtaining receiving, obtain the travel speed of vehicle; And according to the travel speed of the size of the image of barrier and/or situation of change and vehicle, determine the motion state parameters of barrier.

In technique scheme, preferably, step 106 specifically comprises: the motion state parameters of determining barrier whether in predetermined safe range, wherein, when motion state parameters is not during in predetermined safe range, sends early warning signal.

In technique scheme, preferably, motion state parameters comprise following at least one or a combination set of: the real-time distance of barrier and vehicle and/or mean distance in the given time; Barrier and the real-time relative travel speed of vehicle and/or average relative travel speed in the given time; The real time running speed of barrier and/or average overall travel speed in the given time; The real time running acceleration of barrier and/or the acceleration that on average travels in the given time; And early warning signal comprise following at least one or a combination set of: text signal, picture signal, voice signal.

In technique scheme, preferably, also comprise: according to predetermined ratio, image shows region is divided into safety zone and non-security region; And the position of the image that detects barrier in image shows region, wherein, when detecting that the image of barrier is arranged in or part is positioned at non-security region, send early warning signal.

Fig. 2 shows the process flow diagram of vehicle early warning method according to another embodiment of the invention.

As shown in Figure 2, vehicle early warning method according to another embodiment of the invention, comprises the following steps:

Step 202, finds a view by the camera of terminal or drive recorder, and caution frame is set.By the camera of terminal or drive recorder, obtain the imaging of the back car of vehicle.

Step 204, the scope whether the judgement imaging of sending a car enters caution frame, when judgment result is that while being, enters step 206, when the determination result is NO, enters step 208.

Step 206, sends the early warning of " control spacing, please don't bring to a halt " to user.Region in caution frame is safety zone, and the region beyond caution frame is non-security region, when the imaging of sending a car enters non-security region, illustrates that this car is in dangerous with on the relative position of sending a car.

Step 208, is used GPS to obtain the travel speed of this car, and by the imaging of rear car, calculates the spacing of this car and rear car.Terminal or drive recorder can obtain by the GPS of self travel speed of this car, in addition, also can directly obtain from the speed counter of this car the travel speed of this car, and utilize the imaging of rear car by focal length conversion method, to obtain the distance of Ben Che and rear car.

Step 210, judges whether the imaging of rear car in certain hour is becoming large, when judgment result is that while being, enters step 212, when the determination result is NO, returns to step 204.If being imaged on of sending a car in certain hour detected, become large, illustrate that the distance of this and rear car is reducing.

Step 212, the method converting by focal length calculates the travel speed of rear car, and plays caution sound.Being imaged on while becoming large of sending a car in certain hour detected, the distance that this and rear car are described is reducing, according to the travel speed of vehicle, with the imaging that utilizes rear car, the parameters such as travel speed of the rear car that can obtain by focal length conversion method, and then send early warning according to the parameter obtaining, the security of travelling with lifting vehicle, guarantees user's personal safety.

Pass through technique scheme, can be according to the size of the image of the barrier of vehicle periphery and situation of change, the motion state of dyscalculia thing, and to user, send early warning according to the motion state of barrier, thereby make user can adjust according to early warning signal the transport condition of vehicle, the security that lifting vehicle travels, the danger of also having avoided user to observe the road conditions in other directions in addition of the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

Fig. 3 shows the block diagram of vehicle early warning device according to an embodiment of the invention.

As shown in Figure 3, vehicle early warning device 300 according to an embodiment of the invention, comprising: acquiring unit 302, according to the order of obtaining receiving, is used the camera head of terminal or drive recorder to obtain the image of barrier of the either direction of vehicle; Determining unit 304, according to the size of the image of barrier and/or situation of change, determines the motion state parameters of barrier; Prewarning unit 306, the motion state parameters according to barrier, sends early warning signal.

In technique scheme, preferably, acquiring unit 302 also for: according to the order of obtaining receiving, obtain the travel speed of vehicle; And determining unit 304 also for: according to the travel speed of the size of the image of barrier and/or situation of change and vehicle, determine the motion state parameters of barrier.

In technique scheme, preferably, prewarning unit 306 whether in predetermined safe range, wherein, when motion state parameters is not during in predetermined safe range, is sent early warning signal specifically for: the motion state parameters of determining barrier.

In technique scheme, preferably, also comprise: division unit 308, according to predetermined ratio, is divided into safety zone and non-security region by image shows region; And prewarning unit also for: detect the image of barrier in the position in image shows region, wherein, when detecting that the image of barrier is arranged in or part is positioned at non-security region, send early warning signal.

Fig. 4 shows the block diagram of terminal according to an embodiment of the invention.

As shown in Figure 4, the terminal 400 of one embodiment of the present of invention, comprise: vehicle early warning device 402 (being equivalent to the vehicle early warning device 300 in the embodiment shown in Fig. 3), be used for according to the order of obtaining receiving, the image of the barrier of the either direction of the vehicle that the camera that uses the camera head of terminal 400 directly to obtain or use terminal 400 to obtain drive recorder is taken, and according to the size of the image of barrier and/or situation of change, determine the motion state parameters of barrier, last according to the motion state parameters of barrier, send early warning signal.

In this technical scheme, utilize the camera of terminal 400 to obtain the image of barrier of the either direction of vehicle, the method that terminal 400 utilizes focal length to convert, according to the size of the image of the barrier of the either direction of vehicle and/or situation of change, can calculate the motion state parameters of barrier, and to user, send early warning according to the motion state parameters of barrier, thereby so that user can adjust according to early warning signal the transport condition of vehicle.Such as, according to the size of the image of sending a car of rear view of vehicle, the method converting by focal length can rough calculation goes out the distance of rear car and vehicle, when the distance of rear car and vehicle is less than secure threshold, can send early warning signal to user.For another example, when the image of sending a car of rear view of vehicle has increased N doubly and sidesway has occurred, can directly send early warning signal, call user's attention rear car is being accelerated, the method that can also convert by focal length calculate rear car travel speed, the motion state parameterses such as acceleration travel, and send early warning signal according to these motion state parameterses, thereby make user brake slowly or to give way for front vehicle according to early warning signal.By this technical scheme, the security of can lifting vehicle travelling, the danger of having avoided user to observe the road conditions in other directions beyond the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

In technique scheme, preferably, the vehicle early warning device 402 of terminal 400 can also, according to the order of obtaining receiving, obtain the travel speed of vehicle; And according to the travel speed of the size of the image of barrier and/or situation of change and vehicle, determine the motion state parameters of barrier.

In this technical scheme, when Vehicle Speed is too fast or when excessive with the relative travel speed of barrier, only rely on image size and the variation thereof of barrier, the accurate motion state parameters of disturbance in judgement thing, also just cannot guarantee the security of Vehicle Driving Cycle, therefore, can also use GPS or from the speed counter of vehicle, obtain the travel speed of vehicle, image size and the variation thereof of the travel speed of vehicle and barrier are combined, the motion state parameters of disturbance in judgement thing more accurately, thereby greatly increased the security of Vehicle Driving Cycle.Such as, when the image of sending a car of rear view of vehicle has increased N doubly and sidesway has occurred, by the GPS of terminal 400, obtain the travel speed of vehicle, acceleration travels, the method converting by focal length calculates the travel speed of rear car, acceleration travels, and according to both travel speeds, the acceleration that travels is determined both relative travel speeds and the relative acceleration that travels, in addition, can also further determine both movement tendency and relative motion trend, and send early warning signal according to these motion state parameterses of determining, thereby make user brake slowly or to give way for front vehicle according to early warning signal.By this technical scheme, the motion state parameters of disturbance in judgement thing more accurately, promoted the security of Vehicle Driving Cycle, the danger of certainly also having avoided user to observe the road conditions in other directions in addition of the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

In technique scheme, preferably, the motion state parameters that the vehicle early warning device 402 of terminal 400 specifically can be used for determining barrier whether in predetermined safe range, wherein, when motion state parameters is not during in predetermined safe range, sends early warning signal.

In this technical scheme, the motion state parameters of barrier include but not limited to following at least one or a combination set of: real-time relative travel speed, barrier and the vehicle of real-time distance, barrier and the vehicle of barrier and vehicle mean distance, barrier and vehicle in the given time average relative travel speed, the real time running speed of barrier, barrier average overall travel speed, the real time running acceleration of barrier, the barrier acceleration that on average travels in the given time in the given time in the given time.In addition, early warning signal include but not limited to following at least one or a combination set of: text signal, picture signal, voice signal, such as, when determining that the travel speed of rear car surpasses secure threshold, can be in the travel speed value of the demonstration screen display rear car of terminal 400, or the signal language of demonstration " rear car travel speed is too fast, woulds you please take care "; Also can use voice to carry out early warning, play the voice of " rear car travel speed is too fast, woulds you please take care "; Can also there is " danger at mark of demonstration screen display of terminal 400! " picture cause user's concern.Multiple different early warning signal can be used respectively, also can be used in combination, and the object taking safety measures to reach timely reminding user, has increased the security of Vehicle Driving Cycle, has guaranteed user's personal safety.

In technique scheme, preferably, the vehicle early warning device 402 of terminal 400 can also, according to predetermined ratio, be divided into safety zone and non-security region by image shows region; And the position of the image that detects barrier in image shows region, wherein, when detecting that the image of barrier is arranged in or part is positioned at non-security region, send early warning signal.

In this technical scheme, can be division safety zone, image shows region and the non-security region in terminal 400 according to predetermined ratio, when the image of barrier exceeds safety zone, illustrate that vehicle is on the relative position with barrier no longer safe, there is certain danger, now, can send early warning signal, the reminding user safety practice such as take to brake, give way.Such as, a macroscopic red caution frame can be set in image display area, when the image that barrier detected when terminal 400 exceeds caution frame, can assert that current position is dangerous, and then send early warning signal.In addition, also the image of barrier can be exceeded to caution frame itself and regard one type as for the early warning signal of picture signal, user is according to this early warning signal observing safety practice such as can take to brake, give way.

Fig. 5 shows the block diagram of drive recorder according to an embodiment of the invention.

As shown in Figure 5, drive recorder 500 according to an embodiment of the invention, comprise: vehicle early warning device 502 (being equivalent to the vehicle early warning device 300 in the embodiment shown in Fig. 3), be used for according to the order of obtaining receiving, obtain the image of barrier of the either direction of vehicle, and according to the size of the image of barrier and/or situation of change, determine the motion state parameters of barrier, last according to the motion state parameters of barrier, send early warning signal.

In this technical scheme, utilize the camera of drive recorder 500 to obtain the image of barrier of the either direction of vehicle, the method that drive recorder 500 utilizes focal length to convert, according to the size of the image of the barrier of the either direction of vehicle and/or situation of change, can calculate the motion state parameters of barrier, and to user, send early warning according to the motion state parameters of barrier, thereby so that user can adjust according to early warning signal the transport condition of vehicle.Such as, according to the size of the image of sending a car of rear view of vehicle, the method converting by focal length can rough calculation goes out the distance of rear car and vehicle, when the distance of rear car and vehicle is less than secure threshold, can send early warning signal to user.For another example, when the image of sending a car of rear view of vehicle has increased N doubly and sidesway has occurred, can directly send early warning signal, call user's attention rear car is being accelerated, the method that can also convert by focal length calculate rear car travel speed, the motion state parameterses such as acceleration travel, and send early warning signal according to these motion state parameterses, thereby make user brake slowly or to give way for front vehicle according to early warning signal.By this technical scheme, the security of can lifting vehicle travelling, the danger of having avoided user to observe the road conditions in other directions beyond the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

In technique scheme, preferably, the vehicle early warning device 502 of drive recorder 500 can also, according to the order of obtaining receiving, obtain the travel speed of vehicle; And according to the travel speed of the size of the image of barrier and/or situation of change and vehicle, determine the motion state parameters of barrier.

In this technical scheme, when Vehicle Speed is too fast or when excessive with the relative travel speed of barrier, only rely on image size and the variation thereof of barrier, the accurate motion state parameters of disturbance in judgement thing, also just cannot guarantee the security of Vehicle Driving Cycle, therefore, can also use GPS or from the speed counter of vehicle, obtain the travel speed of vehicle, image size and the variation thereof of the travel speed of vehicle and barrier are combined, the motion state parameters of disturbance in judgement thing more accurately, thereby greatly increased the security of Vehicle Driving Cycle.Such as, when the image of sending a car of rear view of vehicle has increased N doubly and sidesway has occurred, by the GPS of drive recorder 500, obtain the travel speed of vehicle, acceleration travels, the method converting by focal length calculates the travel speed of rear car, acceleration travels, and according to both travel speeds, the acceleration that travels is determined both relative travel speeds and the relative acceleration that travels, in addition, can also further determine both movement tendency and relative motion trend, and send early warning signal according to these motion state parameterses of determining, thereby make user brake slowly or to give way for front vehicle according to early warning signal.By this technical scheme, the motion state parameters of disturbance in judgement thing more accurately, promoted the security of Vehicle Driving Cycle, the danger of certainly also having avoided user to observe the road conditions in other directions in addition of the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

In technique scheme, whether the motion state parameters that preferably, the vehicle early warning device 502 of drive recorder 500 specifically can be used for determining barrier is in predetermined safe range, wherein, when motion state parameters is not during in predetermined safe range, send early warning signal.

In this technical scheme, the motion state parameters of barrier include but not limited to following at least one or a combination set of: real-time relative travel speed, barrier and the vehicle of real-time distance, barrier and the vehicle of barrier and vehicle mean distance, barrier and vehicle in the given time average relative travel speed, the real time running speed of barrier, barrier average overall travel speed, the real time running acceleration of barrier, the barrier acceleration that on average travels in the given time in the given time in the given time.In addition, early warning signal include but not limited to following at least one or a combination set of: text signal, picture signal, voice signal, such as, when determining that the travel speed of rear car surpasses secure threshold, can be in the travel speed value of the demonstration screen display rear car of drive recorder 500, or the signal language of demonstration " rear car travel speed is too fast, woulds you please take care "; Also can use voice to carry out early warning, play the voice of " rear car travel speed is too fast, woulds you please take care "; Can also there is " danger at mark of demonstration screen display of drive recorder 500! " picture cause user's concern.Multiple different early warning signal can be used respectively, also can be used in combination, and the object taking safety measures to reach timely reminding user, has increased the security of Vehicle Driving Cycle, has guaranteed user's personal safety.

In technique scheme, preferably, the vehicle early warning device 502 of drive recorder 500 can also, according to predetermined ratio, be divided into safety zone and non-security region by image shows region; And the position of the image that detects barrier in image shows region, wherein, when detecting that the image of barrier is arranged in or part is positioned at non-security region, send early warning signal.

In this technical scheme, can be division safety zone, image shows region and the non-security region on drive recorder 500 according to predetermined ratio, when the image of barrier exceeds safety zone, illustrate that vehicle is on the relative position with barrier no longer safe, there is certain danger, now, can send early warning signal, the reminding user safety practice such as take to brake, give way.Such as, a macroscopic red caution frame can be set in image display area, when the image that barrier detected when drive recorder 500 exceeds caution frame, can assert that current position is dangerous, and then send early warning signal.In addition, also the image of barrier can be exceeded to caution frame itself and regard one type as for the early warning signal of picture signal, user is according to this early warning signal observing safety practice such as can take to brake, give way.

In the present invention, can judge the relative velocity of back car, thus according to real-time road, the motion state of reminding user front vehicle in Vehicle Driving Cycle process, avoid bringing to a halt knock into the back, the hazardous act such as lane change blindly.Such as on the vehicle of running at high speed, the middle controlled position of camera by mobile phone or drive recorder in car found a view, when finding that back car becomes gradually large in screen, as shown in Fig. 6 A to Fig. 6 C, it is large that back car becomes gradually, more and more approach caution frame, the distance that back car and this car are described is more and more less, and the speed of back car is greater than this car, therefore, back car is probably overtaken other vehicles in preparation, now, mobile phone or drive recorder carry out early warning to this situation, and prompting user takes corresponding safety practice.

Image display area at mobile phone or drive recorder is provided with caution frame.When back car is in caution frame, illustrate that this car and the relative distance of back car are greater than safe distance, otherwise, illustrate that this car and the relative distance of back car are less than safe distance.Such as, as shown in Fig. 6 A to Fig. 6 C, when back car is in caution frame, illustrate that this car and the relative distance of back car are greater than safe distance.As shown in Figure 6 D, the image of back car increases to and exceeds caution frame, illustrates that this car and the relative distance of back car have been less than safe distance, need to send prompting to user.By caution frame is set, can pass through the image of back car and the contrast of caution frame, the speed of front vehicle and motion state variation are analyzed, and can be realized intelligent sound and report to the police and recording function.

By technical scheme of the present invention, can realize spacing and report to the police and the warning of overtaking other vehicles.

Spacing is reported to the police and is comprised: mobile phone or drive recorder are placed in car, opening the camera of mobile phone or drive recorder finds a view, the caution frame of special ratios is set simultaneously on screen, when vehicle in the process of moving, if entering, back car exceeds caution frame, as shown in Figure 6 D, illustrate that this car is nearer with the spacing of back car, now, the spacing that mobile phone or drive recorder can calculate and point out user and rear car according to methods such as focal length conversions, and point out user should take the mode of a little stopping, thereby avoid causing knocking into the back because bringing to a halt.

The application scenarios of reporting to the police of overtaking other vehicles is as follows: this car keeps certain speed to travel on highway, back car enters the viewfinder range of the camera of mobile phone or drive recorder, now, by the GPS of mobile phone or drive recorder, obtain the speed of this car, the spacing that also can calculate and point out user and rear car according to methods such as focal length conversions by mobile phone or drive recorder, the size of image that can also be by rear car and the relative velocity that situation of change is obtained rear car and this car, thus draw and show the motion state parameterses such as travel speed of sending a car.If the size of the image of rear car does not change in the given time, illustrate that the travel speed of rear car and this car are close; And if the size of the image of rear car becomes large gradually by little in the given time, illustrate that rear car, by as far as closely, giving it the gun, now can point out user to carry out lane change operation.

While driving due to user, notice generally concentrates on vehicle front, rear view of vehicle is often out in the cold, by technical scheme of the present invention, according to methods such as focal length conversions, calculate the motion state of back car, and send early warning, can allow and ignore the user of rear view of vehicle situation, effectively avoid under specific circumstances the generation of accident, simultaneously, even if user can not ignore rear view of vehicle situation, by technical scheme of the present invention, can be in the demonstration screen display rear view of vehicle situation of mobile phone or drive recorder, user just can be placed on the place ahead eyesight relievedly, having avoided diverts one's attention to turn one's head again observes the road conditions of other directions.Above-mentioned particular case is scene as follows: while taking fast traffic lane on highway, the speed of a motor vehicle of back car is faster than this car, and now, user can receive the alerting signal that lane change is given way; When meeting amber light through crossing, close if rear car is accelerated, user can receive the alerting signal that please don't brake and maybe please move ahead.

More than be described with reference to the accompanying drawings technical scheme of the present invention, by technical scheme of the present invention, can be according to the size of the image of the barrier of vehicle periphery and situation of change, the motion state of dyscalculia thing, and to user, send early warning according to the motion state of barrier, thereby make user can adjust according to early warning signal the transport condition of vehicle, the security that lifting vehicle travels, also the danger of having avoided user to observe the road conditions in other directions in addition of the place ahead cause because diverting one's attention when driving, has guaranteed user's personal safety.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. a vehicle early warning method, is characterized in that, comprising:

According to the order of obtaining receiving, use the camera head of terminal or drive recorder to obtain the image of barrier of the either direction of vehicle;

According to the size of the image of described barrier and/or situation of change, determine the motion state parameters of described barrier;

Motion state parameters according to described barrier, sends early warning signal.

2. vehicle early warning method according to claim 1, is characterized in that, also comprises:

Described in receiving, obtain order, obtain the travel speed of described vehicle; And

According to the travel speed of the size of the image of described barrier and/or situation of change and described vehicle, determine the described motion state parameters of described barrier.

3. vehicle early warning method according to claim 2, is characterized in that, describedly according to the motion state parameters of described barrier, sends early warning signal, specifically comprises:

The described motion state parameters of determining described barrier whether in predetermined safe range, wherein,

When described motion state parameters is not during in described predetermined safe range, send described early warning signal.

4. according to the vehicle early warning method described in any one in claims 1 to 3, it is characterized in that, described motion state parameters comprise following at least one or a combination set of:

The real-time distance of described barrier and described vehicle and/or mean distance in the given time;

Described barrier and the real-time relative travel speed of described vehicle and/or average relative travel speed in the given time;

The real time running speed of described barrier and/or average overall travel speed in the given time;

The real time running acceleration of described barrier and/or the acceleration that on average travels in the given time; And

Described early warning signal comprise following at least one or a combination set of:

Text signal, picture signal, voice signal.

5. vehicle early warning method according to claim 4, is characterized in that, also comprises:

According to predetermined ratio, image shows region is divided into safety zone and non-security region; And

The position of the image that detects described barrier in described image shows region, wherein,

When detecting that the image of described barrier is arranged in or part is positioned at described non-security region, send described early warning signal.

6. a vehicle early warning device, is characterized in that, comprising:

Acquiring unit, according to the order of obtaining receiving, is used the camera head of terminal or drive recorder to obtain the image of barrier of the either direction of vehicle;

Determining unit, according to the size of the image of described barrier and/or situation of change, determines the motion state parameters of described barrier;

Prewarning unit, the motion state parameters according to described barrier, sends early warning signal.

7. vehicle early warning device according to claim 6, is characterized in that, described acquiring unit also for:

Described determining unit also for:

8. vehicle early warning device according to claim 7, is characterized in that, described prewarning unit specifically for:

The described motion state parameters of determining described barrier whether in predetermined safe range, wherein, when described motion state parameters is not during in described predetermined safe range, sends described early warning signal.

9. according to the vehicle early warning device described in any one in claim 6 to 8, it is characterized in that, described motion state parameters comprise following at least one or a combination set of:

Text signal, picture signal, voice signal.

10. vehicle early warning device according to claim 9, is characterized in that, also comprises:

Division unit, according to predetermined ratio, is divided into safety zone and non-security region by image shows region; And

Described prewarning unit also for:

The position of the image that detects described barrier in described image shows region, wherein, when detecting that the image of described barrier is arranged in or part is positioned at described non-security region, sends described early warning signal.

11. 1 kinds of terminals, is characterized in that, comprise the vehicle early warning device as described in any one in claim 6 to 10.

12. 1 kinds of drive recorders, is characterized in that, comprise the vehicle early warning device as described in any one in claim 6 to 10.