CN102848973B - Blind area of vehicle rear mirror detection system and method - Google Patents
Blind area of vehicle rear mirror detection system and method Download PDFInfo
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- CN102848973B CN102848973B CN201210361941.9A CN201210361941A CN102848973B CN 102848973 B CN102848973 B CN 102848973B CN 201210361941 A CN201210361941 A CN 201210361941A CN 102848973 B CN102848973 B CN 102848973B
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Abstract
The invention discloses a kind of blind area of vehicle rear mirror detection system, comprise multiple ultrasonic probes that can produce detectable signal, for detecting the obstacle occurred in the blind area of vehicle side; Described multiple ultrasonic probe is arranged on described vehicle along line direction before vehicle with being spaced apart from each other, and makes total investigative range of described multiple ultrasonic probe can cover the described blind area of described vehicle side at least in part; And blind area detection control unit, be configured to receive described detectable signal and determine that described obstacle enters the direction of described blind area according to the time sequence that at least two ultrasonic probes in described multiple ultrasonic probe detect obstacle.Actv. can be reported to the police by the vehicle existed in rear view mirror blind zone, to improve drive safety while minimizing error-alert degree.
Description
Technical field
The present invention relates to automotive field, be specifically related to a kind of blind area of vehicle rear mirror detection system and method.
Background technology
Although automotive technology makes rapid progress, but vehicle blind zone exists always, the rear view mirror blind zone of such as vehicle, due to automobile rearview mirror limited view, cause turn or doubling process in there is scratch accident because not noticing the vehicle of blind area, What is more gets into an accident.
Number of patent application be 201120358717.5 Chinese patent literature disclose a kind of for motor vehicle side direction detector, vehicle in rear view mirror blind zone is detected by installing ultrasonic probe on the back mirror of outside vehicle, after vehicle turn signal is opened, when there are other vehicles if detect in adjacent lane, report to the police, in case cause danger.Described side direction detector carries out early warning to the vehicle in adjacent lane when can solve vehicle lane change, but because vehicle body side is only provided with a ultrasonic probe, detection range is limited, cannot cover the region this car being had to potential safety hazard completely.On the other hand, if when the vehicle detected is contrary with this car travel direction, the vehicle detected then enters within the scope of blind area of vehicle rear mirror within sweep of the eye from driver, now this is without the need to reporting to the police, thus described side direction detector now carries out warning and can form flase alarm, causes driver to reduce the degree of belief of side direction detector alarm.
Summary of the invention
One object of the present invention is to overcome at least one defect of the prior art.Another object of the present invention is to provide a kind of new blind area of vehicle rear mirror detection system and method, can report to the police to the vehicle existed in rear view mirror blind zone by actv., to improve drive safety while minimizing error-alert degree.
According to one aspect of the present invention, provide a kind of blind area of vehicle rear mirror detection system, comprising:
Multiple ultrasonic probes of detectable signal can be produced, for detecting the obstacle occurred in the rear view mirror blind zone of vehicle side; Described multiple ultrasonic probe is arranged on described vehicle along line direction before vehicle with being spaced apart from each other, and makes total investigative range of described multiple ultrasonic probe can cover the described blind area of described vehicle side at least in part;
Blind area detection control unit, is configured to receive described detectable signal and determines that described obstacle enters the direction of described blind area according to the time sequence that at least two ultrasonic probes in described multiple ultrasonic probe detect obstacle.
Preferably, described multiple ultrasonic probe comprises the first ultrasonic probe, and the investigative range of described first ultrasonic probe is positioned at the front side of described blind area at least in part.Particularly, described first ultrasonic probe can be arranged in the headstock region of described vehicle.
Preferably, described multiple ultrasonic probe comprises second ultrasonic probe in the tailstock region being arranged in described vehicle.Combined with described second ultrasonic probe by described first ultrasonic probe, rear view mirror blind zone scope vehicle being had to potential safety hazard can not only be covered, the service direction of disturbance in judgement thing can also be carried out in conjunction with the ultrasonic signal of described first ultrasonic probe and described second ultrasonic probe.
Further, described blind area detection control unit is also configured to: do not send alerting signal when described obstacle enters described blind area from the front of described blind area; Alerting signal is sent when described obstacle enters described blind area from the non-front of described blind area;
Described blind area of vehicle rear mirror detection system also comprises warning device, for receiving the alerting signal of described blind area detection control unit, and sends corresponding alarm according to this alerting signal.
Further, described alerting signal comprises: represent the one-level alerting signal that hazard level is lower and represent the secondary alarm signal that hazard level is higher.Described blind area detection control unit is also configured to the steering indicating light start signal detecting described vehicle, and send one-level alerting signal to described warning device when described obstacle enters described blind area from the non-front of described blind area when the steering indicating light start signal of described vehicle side not detected, send secondary alarm signal to described warning device when described obstacle enters described blind area from the non-front of described blind area when the steering indicating light start signal of described vehicle side being detected.
Further, described blind area detection control unit is also configured to the vehicle speed signal detecting described vehicle, and does not send alerting signal when the speed of a motor vehicle is greater than 140 kilometers/hour.
According to another aspect of the present invention, provide a kind of blind area of vehicle rear mirror detection method, comprise the steps:
Detection steps: utilize multiple ultrasonic probe to detect vehicle side, total investigative range of described multiple ultrasonic probe can cover the blind area of described vehicle side at least in part;
Barrier judgment step: judge whether have obstacle in described blind area; When there being obstacle, travel direction determining step; When there is no obstacle, return detection steps;
Walking direction step: judge that described obstacle enters direction, described blind area according to the time sequence that at least two ultrasonic probes in described multiple ultrasonic probe detect obstacle; When described obstacle when entering described blind area from the front of described blind area, then returns described detection steps; When described obstacle enters described blind area from the non-front of described blind area, then carry out alarming step:
Alarming step: given the alarm by warning device.
Further, steering indicating light determining step is also comprised: judge whether the steering indicating light of described vehicle side is opened; When described steering indicating light is not opened, then in described alarming step, send the primary alarm representing that hazard level is lower; When described steering indicating light is opened, then in described alarming step, send the second-level alarm representing that hazard level is higher.
Further, speed of a motor vehicle determining step is also comprised: judge whether the speed of a motor vehicle of described vehicle is greater than 140 kilometers/hour; When the described speed of a motor vehicle is greater than 140 kilometers/hour, then return detection steps; When the described speed of a motor vehicle is less than or equal to 140 kilometers/hour, then carry out barrier judgment step.
Whether the detection vehicle rear view mirror blind zone real-time in vehicle operation of blind area of vehicle rear mirror of the present invention detection system and method exists obstacle, and determine whether to need to carry out early warning according to the direction that the obstacle detected enters blind area, decrease error-alert degree while improving drive safety.
Accompanying drawing explanation
Fig. 1 schematically shows the scope of blind area of vehicle rear mirror;
Figure 2 shows that the blind area of vehicle rear mirror detection system structural representation that one embodiment of the invention provides;
Fig. 3 shows the layout schematic diagram of the ultrasonic probe of the blind area of vehicle rear mirror detection system according to one embodiment of the present of invention;
Figure 4 shows that the blind area of vehicle rear mirror detection system structural representation for another embodiment of the present invention provides;
Figure 5 shows that the blind area of vehicle rear mirror detection method schematic flow sheet that another embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, blind area of vehicle rear mirror provided by the invention detection system is further described.
The rear view mirror blind zone scope of vehicle typically refers to ABCD tetra-regions as shown in dash area in Fig. 1.Particularly, the length in A district, C district is the length of vehicle mirrors to the tailstock, and width W value is generally 2.5 meters; The height H in B district, D district is generally 3 meters, and width W value is consistent with the width in A district, C district, is 2.5 meters.Described A district, the distance of B offset on the left of vehicle body are h, C district, the distance of D offset on the right side of vehicle body is similarly h, and h is generally 0.5 meter.Shown in ABCD tetra-region memories obstacle can affect turning or the lane change of vehicle, therefore by carrying out monitoring and early warning to the obstacle in described A, B, C, D region, turn inside diameter or lane change can be avoided to cause danger.Here, obstacle can include but not limited to other vehicle, pedestrian, other mobile object or fixed buildings etc.
As shown in Figure 1, blind area of vehicle rear mirror is distributed in vehicle both sides.For the sake of simplicity, hereafter only the present invention is explained for the blind area of vehicle side.Be readily appreciated that, for the blind area of vehicle opposite side, same or analogous mode can be adopted process.
As a preferred embodiment of the present invention, blind area of vehicle rear mirror detection system as shown in Figure 2 can comprise blind area detection control unit 1, warning device 2 and probe 3.Here popping one's head in 3 can be multiple ultrasonic probe, for detecting the obstacle that occurs in the rear view mirror blind zone of vehicle side and send detectable signal after detecting obstacle.Be readily appreciated that, can similarly arrange multiple ultrasonic probe at vehicle opposite side, with the obstacle occurred in detection vehicle opposite side blind area.Described blind area detection control unit 1 is configured to receive described detectable signal and determines that described obstacle enters the direction of described blind area according to the time sequence that at least two ultrasonic probes detect obstacle, and sends alerting signal when detecting the non-front of described obstacle from described blind area and entering described blind area to warning device 2.In the embodiment shown in fig. 3, the quantity for the probe 3 of blind area on the left of detection vehicle is two, is respectively the first ultrasonic probe 201 and the second ultrasonic probe 202 being positioned at the tailstock that are arranged in headstock.Described first ultrasonic probe 201 can be arranged at vehicle front bumper left end, and its investigative range can be set to a part of region on front side of a part of A district shown in coverage diagram 1 and A district.Described second ultrasonic probe 202 can be arranged at vehicle rear bumper left end.Its investigative range can be set to the B district shown in coverage diagram 1 and a part of A district.First ultrasonic probe 201 and the second ultrasonic probe 202 cover the blind area of vehicle left side generally at least in part.Be readily appreciated that, two other ultrasonic probe can be arranged at vehicle right side symmetrically, with the blind area on the right side of detection vehicle with the ultrasonic probe 201 and 202 of vehicle left side.
Like this, when the first ultrasonic probe 201 being positioned at headstock first detects obstacle, and when detecting described obstacle after being positioned at the second ultrasonic probe 202 of the tailstock, mean that described obstacle enters described blind area scope by front, blind area.In this case, chaufeur self just easily can be known within the scope of the blind area that had obstacle to enter into by the visual observation of oneself, and therefore described blind area detection control unit 1 can not send alerting signal.When the second ultrasonic probe 202 being positioned at the tailstock first detects obstacle, and when detecting described obstacle after being positioned at the first ultrasonic probe 201 of headstock, or when only detecting obstacle by the second ultrasonic probe 202, this means that obstacle enters blind area by the non-forward direction of blind area.Now, chaufeur may can not recognize in blind area have obstacle, and therefore described blind area detection control unit 1 can send alerting signal to warning device 2.Although only the present invention is described with two ultrasonic probes 201 and 202 in the embodiments of figure 3, in other embodiments, 3 ultrasonic probes that can comprise greater number of popping one's head in detect the obstacle occurred in the blind area of vehicle side.These ultrasonic probes can be arranged on described vehicle along line direction before vehicle with being spaced apart from each other, and make their total investigative range can cover the blind area of vehicle side more thick and fast.According to the time sequence that in these ultrasonic probes, at least two or more ultrasonic probes detect obstacle, detection control unit in blind area can determine that described obstacle enters the direction of described blind area.
Described warning device 2 can receive the alerting signal of described blind area detection control unit 1, and sends corresponding alarm according to this alerting signal.
Preferably, described alerting signal can be divided into the lower one-level alerting signal of expression hazard level according to hazard level rank and represent the secondary alarm signal that hazard level is higher, enable driver judge the hazard level of situation at that time and then make appropriate driving strategy.Correspondingly, described blind area detection control unit 1 can be configured to the steering indicating light start signal detecting described vehicle.This steering indicating light start signal can be gathered by steering indicating light signal gathering unit 7 and send to blind area to detect control unit 1.When described obstacle enters described blind area from the non-front of described blind area and when the steering indicating light start signal of described vehicle side not detected, illustrate that chaufeur now may not turn to intention, therefore, detection control unit 1 in blind area can send to described warning device 2 the one-level alerting signal representing that hazard level is lower.When described obstacle enters described blind area from the non-front of described blind area and when the steering indicating light start signal of described vehicle side being detected, illustrate that chaufeur now may turn to having the side of obstacle, hazard level is higher, and therefore detection control unit 1 in blind area can send secondary alarm signal to described warning device 2.In a specific embodiment, described warning device 2 can comprise audible alarm unit and light alarming device; When described warning device 2 receives described one-level alerting signal, only send light alarm; When described warning device 2 receives described second-level alarm signal, sound alarm and light alarm simultaneously.Carry out early warning by the alarm of different stage, contribute to making suitable driving strategy after driver is judged present case by the rank of alarm.
Because super sonic is a kind of mechanical wave, in communication process, there is Doppler effect, if the speed of a motor vehicle is more than 140 kilometers/hour, system reliability is just difficult to ensure.Therefore described blind area detection control unit 1 can be configured to the vehicle speed signal detecting described vehicle, alerting signal is not sent, to avoid occurring that flase alarm vehicle speed signal can be gathered by speed data collection unit 6 and send to described blind area to detect control unit 1 when the speed of a motor vehicle is greater than 140 kilometers/hour.
Described blind area of vehicle rear mirror detection system can be opened automatically when automobile starting, forgets unlocking vehicle rear view mirror blind zone detection system when can prevent driver from starting automobile like this.In one embodiment, described blind area detection control unit 1 is connected with ignition lock 5, and when ignition lock 5 is switched to " ON " shelves, described blind area detection control unit 1 controls described blind area of vehicle rear mirror detection system and automatically starts.Described blind area of vehicle rear mirror detection system can also comprise one and detect with described blind area the hand switch 4 that control unit is connected, for making user can be manually opened or close described system.
Described blind area of vehicle rear mirror detection system directly can be powered by vehicle, also can adopt independent Power supply.In one embodiment, described blind area detection control unit 1 can share a main frame with Reverse Sensor, the degree of utilization of main frame can not only be improved like this, can also reduce and take up room, only adopt a main frame just can realize reversing early warning and blind area of vehicle rear mirror early warning.
Fig. 4 shows another embodiment, is that described blind area of vehicle rear mirror detection system can not comprise steering indicating light signal gathering unit 7 and speed data collection unit 6 with difference embodiment illustrated in fig. 3.Main control unit 1 is detected in described blind area can obtain described vehicle speed signal, described steering indicating light signal and/or described ignition lock signal by CAN 8.Rigid line wire harness quantity can be reduced like this, make system architecture simpler.
Fig. 5 shows the schematic flow sheet of an embodiment of blind area of vehicle rear mirror of the present invention detection method, comprises the steps:
Step 101: utilize multiple ultrasonic probe to detect car side region, total investigative range of described multiple ultrasonic probe can cover the rear view mirror blind zone of described vehicle side at least in part;
Step 102: judge whether described ultrasonic probe detects obstacle, is, continues step 103, otherwise return step 101;
Step 103: whether disturbance in judgement thing is enter rear view mirror blind zone from vehicle front, is return step 101, otherwise continue step 104;
Step 104: judge whether the steering indicating light of described obstacle side is opened; Be continue step 106, otherwise continue step 105;
Step 105: send primary alarm, then returns step 101; Described primary alarm means that harmful grade is lower, obstacle has been found but the closedown of the steering indicating light of homonymy in the rear view mirror blind zone of vehicle side, mean that vehicle does not have the purpose to the turning of this side or lane change, therefore only note in rear view mirror blind zone, having obstacle to exist with primary alarm prompting driver;
Step 107: send second-level alarm, then returns step 101.Described second-level alarm means that harmful grade is higher, if find obstacle and the unlatching of the steering indicating light of homonymy in the rear view mirror blind zone of vehicle side, then mean that vehicle is about to there being obstacle side to turn or lane change, if driver does not notice described obstacle, likely traffic accident can be there is, therefore send second-level alarm simultaneously, note in rear view mirror blind zone, having obstacle to exist to remind driver, avoid traffic accident occurs.
Particularly, described primary alarm can be light alarm, and described second-level alarm can be audible alarm, or is audible alarm and light alarm, the obstacle that have ignored in rear view mirror blind zone to avoid driver not notice light alarm.
Further, described blind area of vehicle rear mirror detection method can also comprise:
Speed of a motor vehicle determining step: judge whether the speed of a motor vehicle of described vehicle is greater than 140 kilometers/hour; When the described speed of a motor vehicle is greater than 140 kilometers/hour, then return step 101; When the described speed of a motor vehicle is less than or equal to 140 kilometers/hour, then carry out step 102.
Described speed of a motor vehicle determining step between step 102 and step 103, can also judge whether the speed of a motor vehicle of described vehicle is greater than 140 kilometers/hour; When the described speed of a motor vehicle is greater than 140 kilometers/hour, then return step 101; When the described speed of a motor vehicle is less than or equal to 140 kilometers/hour, then carry out step 103.Now, the described speed of a motor vehicle can be the absolute speed of a motor vehicle of vehicle, also can be the relative speed of a motor vehicle of vehicle relative to obstacle.When the relative speed of a motor vehicle is greater than 140 kilometers/hour, according to the blind area of vehicle rear mirror range computation shown in Fig. 1, time of cars meeting between vehicle and obstacle mostly is 1.54s most, time is very short, even if the field range entering chaufeur that described obstacle of not reporting to the police also can be very fast or roll described rear view mirror blind zone scope away from.
According to described blind area of vehicle rear mirror detection method, can be real-time the obstacle in blind area of vehicle rear mirror is detected and gives the alarm, driver is reminded to note there is obstacle in rear view mirror blind zone, to avoid not noticing the situation Xia Bing road of obstacle in blind area or turning and traffic accident occurs, thus described blind area of vehicle rear mirror detection system can improve drive safety.In addition according to described blind area of vehicle rear mirror detection method, the direction described obstacle detected being entered to blind area of vehicle rear mirror judges, can greatly reduce error-alert degree.
Above embodiment only for illustration of technical scheme of the present invention, is not limited to protection scope of the present invention.The amendment that those skilled in the art can carry out technical scheme of the present invention or replace on an equal basis, and do not depart from the spirit and scope of technical solution of the present invention.
Claims (7)
1. a blind area of vehicle rear mirror detection system, comprising:
Multiple ultrasonic probes of detectable signal can be produced, for detecting the obstacle occurred in the blind area of vehicle side; Described multiple ultrasonic probe is arranged on described vehicle along line direction before vehicle with being spaced apart from each other, and makes total investigative range of described multiple ultrasonic probe can cover the described blind area of described vehicle side at least in part;
Blind area detection control unit, is configured to receive described detectable signal and determines that described obstacle enters the direction of described blind area according to the time sequence that at least two ultrasonic probes in described multiple ultrasonic probe detect obstacle; Described blind area detection control unit is also configured to: do not send alerting signal when described obstacle enters described blind area from the front of described blind area; Alerting signal is sent when described obstacle enters described blind area from the non-front of described blind area;
Warning device, for receiving the alerting signal of described blind area detection control unit, and sends corresponding alarm according to this alerting signal;
Wherein, described alerting signal comprises: represent the one-level alerting signal that hazard level is lower and represent the secondary alarm signal that hazard level is higher;
Described blind area detection control unit is also configured to the steering indicating light start signal detecting described vehicle, and send one-level alerting signal to described warning device when described obstacle enters described blind area from the non-front of described blind area when the steering indicating light start signal of described vehicle side not detected, send secondary alarm signal to described warning device when described obstacle enters described blind area from the non-front of described blind area when the steering indicating light start signal of described vehicle side being detected.
2. blind area of vehicle rear mirror according to claim 1 detection system, is characterized in that, described multiple ultrasonic probe comprises the first ultrasonic probe, and the investigative range of described first ultrasonic probe is positioned at the front side of described blind area at least in part.
3. blind area of vehicle rear mirror according to claim 2 detection system, is characterized in that, described first ultrasonic probe is arranged in the headstock region of described vehicle.
4. the blind area of vehicle rear mirror detection system according to Claims 2 or 3, is characterized in that, described multiple ultrasonic probe comprises second ultrasonic probe in the tailstock region being arranged in described vehicle.
5. blind area of vehicle rear mirror according to claim 1 detection system, is characterized in that, described blind area detection control unit is also configured to the vehicle speed signal detecting described vehicle, and does not send alerting signal when the speed of a motor vehicle is greater than 140 kilometers/hour.
6. a blind area of vehicle rear mirror detection method, comprises the steps:
Detection steps: utilize multiple ultrasonic probe to detect vehicle side, total investigative range of described multiple ultrasonic probe can cover the blind area of described vehicle side at least in part;
Barrier judgment step: judge whether have obstacle in described blind area; When there being obstacle, travel direction determining step; When there is no obstacle, return detection steps;
Walking direction step: judge that described obstacle enters direction, described blind area according to the time sequence that at least two ultrasonic probes in described multiple ultrasonic probe detect obstacle; When described obstacle when entering described blind area from the front of described blind area, then returns described detection steps; When described obstacle enters described blind area from the non-front of described blind area, then carry out alarming step:
Alarming step: given the alarm by warning device;
Steering indicating light determining step: judge whether the steering indicating light of described vehicle side is opened;
Wherein, when described steering indicating light is not opened, then in described alarming step, send the primary alarm representing that hazard level is lower; When described steering indicating light is opened, then in described alarming step, send the second-level alarm representing that hazard level is higher.
7. blind area of vehicle rear mirror according to claim 6 detection method, is characterized in that, also comprises speed of a motor vehicle determining step: judge whether the speed of a motor vehicle of described vehicle is greater than 140 kilometers/hour; When the described speed of a motor vehicle is greater than 140 kilometers/hour, then return detection steps; When the described speed of a motor vehicle is less than or equal to 140 kilometers/hour, then carry out barrier judgment step.
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Effective date of registration: 20190327 Address after: 317000 east gate of Taizhou City, Zhejiang Province Co-patentee after: Zhejiang Geely Holding Group Co., Ltd. Patentee after: Zhejiang Geely Automobile Research Institute Co., Ltd. Address before: 311228 No. 206 Farmer's Second House in Linjiang Industrial Park, Xiaoshan District, Hangzhou City, Zhejiang Province Co-patentee before: Zhejiang Geely Automobile Research Institute Co., Ltd. Patentee before: Hangzhou Branch, Zhejiang Geely Automobile Research Institute Co., Ltd. Co-patentee before: Zhejiang Geely Holding Group Co., Ltd. |
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