CN109448437A - Pedestrains safety street crossing prompt system and method towards driver - Google Patents
Pedestrains safety street crossing prompt system and method towards driver Download PDFInfo
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- CN109448437A CN109448437A CN201811341253.XA CN201811341253A CN109448437A CN 109448437 A CN109448437 A CN 109448437A CN 201811341253 A CN201811341253 A CN 201811341253A CN 109448437 A CN109448437 A CN 109448437A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
- G08G1/0116—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from roadside infrastructure, e.g. beacons
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/09623—Systems involving the acquisition of information from passive traffic signs by means mounted on the vehicle
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Abstract
The present invention provides pedestrains safety street crossing prompt system and method towards driver, belongs to traffic safety early warning technology field.Present system includes data acquisition device, information judgment means, vehicle-mounted early warning distributing device and pedestrian's street crossing suggestion device；Data acquisition device acquires the multidate information of pedestrian and vehicle in real time, and is sent to information judgment means；Information judgment means receive and process the multidate information of data acquisition device transmitting: when judging result, which is, to be clashed, carrying out OLED to pedestrian's street crossing suggestion device publication hint instructions and show；When judging result is that can clash and CBRIWhen≤0.9, information judgment means send voice broadcast and vibration prompt instruction to vehicle-mounted early warning distributing device to the publication OLED display reminding instruction of pedestrian's street crossing suggestion device.The present invention solves the problems, such as that the safety of pedestrian's street crossing when existing low visibility is lower.The present invention can be used for pedestrian's street crossing prompt.
Description
Technical field
The present invention relates to pedestrains safety street crossing prompt system and methods, belong to traffic safety early warning technology field.
Background technique
Pedestrian is the disadvantaged group in road traffic system, occur road traffic accident after by grievous injury a possibility that
It is very big.According to United States highways safe association statistics, the death toll of U.S. pedestrian in 2015 is 5376 people, and 2016 are close on sixty years of age 00
People, new peak of the wound over 20 years.Road Traffic Safety in China situation very severe, 2015, Road Traffic Accidents in China sum was about
It is 18.7 ten thousand, death toll is about 5.8 ten thousand people, and pedestrian accident injures and deaths number accounts for about the total number of casualties of road traffic accident
20%, the number of casualties of pedestrian's street crossing accounts for 50% or more of pedestrian accident death toll, how to improve the crossing the street in security of pedestrian
Have become the important content that bus or train route cooperates with lower pedestrian's street crossing prompt system research.
Patent CN107274722A discloses a kind of towards the traffic safety early warning system and method that use mobile phone pedestrian.Road
Side unit analyzes whether vehicle and pedestrian can rush according to the pedestrian's multidate information and vehicle multidate information in institute radiation areas
It is prominent, alarm command is sent to the pedestrian's mobile terminal, vehicle on-board unit and crossing warning lamp for being likely to occur conflict,
Middle pedestrian crossing lamp is using energy storage type light emitting module.
Patent CN102622912A discloses a kind of pedestrian danger method for early warning.The method for early warning mainly utilizes signal to examine
The system that device, bandpass filter, A/D converter, data processor, driving amplifier and actuator are constituted is surveyed to realize, is passed through
The transmission and conversion of a series of signal, output control pulse, driving alarm exports alarm signal after obtaining subpulse, and then helps
Pedestrian dodges, avoids motorcycle.
Since 2017, " not giving precedence to pedestrian's candid photograph " system of all parts of the country installation has standardized driving to a certain extent
Member gives precedence to the behavior of pedestrian, improves comity consciousness.
But in relevant pedestrains safety street crossing prompt and early warning system without reference to low visibility the case where, when encountering view
When the relatively low environment of the visibility such as wild blind area, bad weather and night at dusk, since pedestrian and driver are not easy to find
Other side, the probability that traffic accidents occur for pedestrian's street crossing are still relatively high.The factor for determining visibility includes: the view of people
Power, the visual field, the shape of object, size and background, illuminance and atmospheric transparency etc..With time, the variation in space, energy
Also great changes have taken place for the value of degree of opinion.The emergency warning lamp usually flashed visual effect under low visibility is bad, is not easy to cause driver
Enough attention.Therefore it is badly in need of a kind of pedestrian that street crossing can be also detected in the case where low visibility, it at the first time will street crossing
Pedestrian information feeds back to the crossing the street in security warning technology of driver, and then further increases the safety of pedestrian's street crossing.
Summary of the invention
The present invention is to solve the problems, such as that the safety of pedestrian's street crossing when low visibility is lower, provides the row towards driver
People crosses the street safely prompt system and method.
Pedestrains safety of the present invention towards driver crosses the street prompt system, comprising: data acquisition device, information judgement
Device, vehicle-mounted early warning distributing device and pedestrian's street crossing suggestion device；
The data acquisition device, for acquiring the multidate information of pedestrian and vehicle in real time, and by the dynamic message transmission
To information judgment means；
The information judgment means are positioned adjacent to the road side of stop line, for receiving and processing data acquisition device
The multidate information of transmitting, according to the judging result after processing, respectively to pedestrian's street crossing suggestion device and vehicle-mounted early warning publication dress
Set transmission hint instructions；
The pedestrian's street crossing suggestion device is arranged on crossing, for receiving mentioning for information judgment means transmission
Show that OLED is carried out when instruction to be shown；
The vehicle-mounted early warning distributing device is arranged in the car, for referring in the prompt for receiving the transmission of information judgment means
Voice broadcast and vibration prompt are issued when enabling.
It is further described as to above-mentioned technical proposal:
Further, the data acquisition device includes vehicle GPS, vehicle speed detector, the vehicle of setting in the car
Acceleration detector, and the neighbouring thermal infrared imager of information judgment means, wireless transmitter, the vehicle GPS are set
For real-time detection vehicle location, the vehicle speed detector is used for real-time detection car speed, the vehicle acceleration inspection
It surveys device and is used for real-time detection vehicle acceleration；Thermal infrared imager is for capturing pedestrian image；The vehicle GPS, car speed inspection
Device, vehicle acceleration detector, thermal infrared imager is surveyed respectively to be transmitted to the multidate information of collected pedestrian and vehicle wirelessly
Transmitter, the wireless transmitter are used to the multidate information received being converted to radio signal, and are sent to information judgement
Device.
Further, the information judgment means include conflict judgment module and traffic environment visibility judgment module；Institute
State whether information analysis pedestrian and vehicle of the conflict judgment module for sending according to data acquisition device can clash；It is described
Traffic environment visibility judgment module is used to determine traffic environment visibility index according to the information that data acquisition device is sent.
Further, pedestrian's street crossing suggestion device includes single-chip microcontroller, OLED display module；The single-chip microcontroller is used for according to letter
Cease the hint instructions control OLED display module work that judgment means are sent；The OLED display module includes several segmenteds
The OLED display panel being uniformly laid on crossing.
Further, the width of OLED display panel is 40cm~45cm, the spacing between two adjacent OLED display panels
For 60cm~80cm.
Further, the display device of the OLED display panel uses VGG12864G-CM21, the singlechip chip
Using SSD1303.
Pedestrains safety of the present invention towards driver crosses the street reminding method, is achieved through the following technical solutions:
Step 1: vehicle GPS real-time detection vehicle location, vehicle speed detector real-time detection car speed, vehicle add
Speed detector real-time detection vehicle acceleration, thermal infrared imager capture pedestrian image；The vehicle GPS, vehicle speed detection
The multidate information of collected pedestrian and vehicle are transmitted to wireless hair respectively by device, vehicle acceleration detector, thermal infrared imager
The information received is converted to radio signal by emitter, wireless transmitter, and is sent to information judgment means；
Step 2: information judgment means receive the multidate information that data acquisition device is sent, and by conflict judgment module root
Whether can clash according to received information analysis pedestrian and vehicle, be believed based on the received by traffic environment visibility judgment module
It ceases and determines traffic environment visibility index CBRI；
Step 3: information judgment means are mentioned to the publication of pedestrian's street crossing suggestion device when judging result, which is, to be clashed
Show instruction；When judging result is that can clash and CBRIWhen≤0.9, information judgment means are simultaneously to pedestrian's street crossing suggestion device
Hint instructions are sent with vehicle-mounted early warning distributing device；
It is shown Step 4: pedestrian's street crossing suggestion device carries out OLED when receiving the hint instructions of information judgment means transmission
Show；Vehicle-mounted early warning distributing device issues voice broadcast when receiving the hint instructions of information judgment means transmission and vibration mentions
Show.
Present invention feature the most prominent and significant beneficial effect are:
Pedestrains safety street crossing prompt system and method according to the present invention towards driver, using OLED display surface
Plate has the advantages that high brightness, and driver can be allowed preferably to receive visual cues under adverse weather using OLED display panel
Information, and thermal infrared imager is mounted in trackside, this image collecting device is not influenced by inclement weather conditions, in any feelings
It can be embodied under condition and compare clearly profile information, have that shape is firm, easy for installation and thermal imaging effect stability is reliable
The advantages of；The present invention has comprehensively considered pedestrian's street crossing degree of safety and traffic environment state of visibility, can be improved to pedestrian's identification
Accuracy, and pedestrian's street crossing suggestion device and vehicle-mounted early warning distributing device can complete jointly classification prompt according to visibility scale
Work, pedestrian gives driver to provide the information of effectively evacuation pedestrian, to reduce without wearing any positioning and prediction meanss
The traffic accident rate of pedestrian's street crossing improves the security impact of pedestrian's street crossing significant especially in low visibility.It is imitative
True experiment shows under traffic environment low visibility that the present invention is it is possible to prevente effectively from about 92% vehicle-pedestrian conflicts, and then can subtract
Few pedestrian crossing traffic accident occurs, and improves pedestrian's street crossing safety.
Detailed description of the invention
Fig. 1 is present system structural schematic diagram；
Fig. 2 is the road scene schematic diagram of embodiment；
Fig. 3 is the method for the present invention flow chart；
Wherein, 1. data acquisition device, 2. information judgment means, 3. pedestrian's street crossing suggestion devices, 4. vehicle-mounted early warning publications
Device, 5. vehicles, 6. pedestrians, 7. stop lines.
Specific embodiment
Specific embodiment 1: be illustrated in conjunction with Fig. 1, Fig. 2 to present embodiment, present embodiment provide towards driving
Sail the pedestrains safety street crossing prompt system of people, comprising: data acquisition device 1, information judgment means 2, vehicle-mounted early warning distributing device 4
And pedestrian's street crossing suggestion device 3；
The data acquisition device 1, for acquiring the multidate information of pedestrian and vehicle in real time, and by the dynamic message transmission
To information judgment means 2；
The information judgment means 2 are positioned adjacent to any side of road at stop line, and (usual stop line 7 is apart from people's row
The distance of zebra crossing is 1M), for receiving and processing the multidate information of the transmitting of data acquisition device 1, according to sentencing after processing
Break as a result, sending hint instructions to pedestrian's street crossing suggestion device 3 and vehicle-mounted early warning distributing device 4 respectively；
The pedestrian's street crossing suggestion device 3 is arranged on crossing, for receiving the transmission of information judgment means 2
OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) display is carried out when hint instructions；
The vehicle-mounted early warning distributing device 4 is arranged in the car, in the prompt for receiving the transmission of information judgment means 2
Voice broadcast and vibration prompt are issued when instruction.
Specific embodiment 2: the present embodiment is different from the first embodiment in that, the data acquisition device 1 wraps
Vehicle GPS, vehicle speed detector, the vehicle acceleration detector of setting in the car are included, and setting judges to fill in information
2 neighbouring thermal infrared imagers, wireless transmitter are set, the vehicle GPS is used for real-time detection vehicle location, the car speed inspection
It surveys device and is used for real-time detection car speed, the vehicle acceleration detector is used for real-time detection vehicle acceleration；Infrared thermal imagery
Instrument is used for the calculating of traffic environment visibility for capturing pedestrian image；The vehicle GPS, vehicle speed detector, vehicle
Acceleration detector, thermal infrared imager are respectively transmitted the multidate information of collected pedestrian and vehicle by RS-485 interface
To wireless transmitter, the wireless transmitter is used to the multidate information received being converted to radio signal, and passes through transmitting
Antenna is sent to information judgment means 2.
Thermal infrared imager has the characteristics that not to be illuminated by the light and the inclement weather conditions such as greasy weather influence, under any circumstance all
It can embody and compare clearly profile information.Thermal infrared imager in present embodiment use Tau2640 machine core and
25mm camera lens provides the holder interface of standard, exports the vision signal of NTSC/PAL standard, and signaling interface uses independent I/
O control interface, can be compatible with RS-485, and external dimensions is 44.5mm × 44.5mm, have shape it is firm, it is easy for installation and it is hot at
As the reliable advantage of effect stability.
Other steps and parameter are same as the specific embodiment one.
Specific embodiment 3: the present embodiment is different from the first and the second embodiment in that, the information judgement dress
Setting 2 includes conflict judgment module and traffic environment visibility judgment module；The conflict judgment module according to data for acquiring
Whether the information analysis pedestrian and vehicle that device 1 is sent can clash；The traffic environment visibility judgment module is used for root
Traffic environment visibility index is determined according to the information that data acquisition device 1 is sent.
Other steps and parameter are the same as one or two specific embodiments.
Specific embodiment 4: present embodiment, unlike specific embodiment three, pedestrian's street crossing suggestion device 3 wraps
Include single-chip microcontroller, OLED display module, power adapter；Power adapter can be public using TI in present embodiment using a variety of
TPS65137 Activematric OLED (AMOLED) power solution of department, the liter including one using LDO as rear voltage-stablizer
Pressure converter.Monolithic processor controlled is the core of whole system, the hint instructions control for being sent according to information judgment means 2
OLED display module work；The OLED display module include several segmenteds to be uniformly laid on OLED on crossing aobvious
Show panel.Traditional LC D is liquid crystal display, itself does not shine, and needs backlight, provides electric field by TFT substrate to control liquid
The angle of crystalline substance rotation, to play the role of controlling LCD penetration.OLED is actually a thin-film device, i.e., anode with
The stable red electroluminescent device of organic thin film that cathode sandwich several layers are made of organic film.When there is electric current to pass through
When, these organic materials will shine.OLED intersects screen using common matrix, positioned at cross arrangement anode and cathode it
Between, by the combination for gating anode and cathode, so that it may control lighting for each OLED.Light caused by OLED penetrates
Power is very strong, and in the case where under low visibility, identification is also above other display technologies.OLED display technology have self-luminous,
Wide viewing angle, almost infinite high contrast, compared with low power consumption, high reaction speed the advantages that；Wide viewing angle and high contrast are more advantageous
In the attention for causing driver；Response delay and vehicle and due to high reaction speed, relative to driver
Speed, the response delay of OLED may be considered 0, thus can real-time display early warning, reserved for driver's reaction more
Reaction time effectively increases the safety of pedestrian's street crossing.
Other steps and parameter are identical as specific embodiment one, two or three.
Specific embodiment 5: present embodiment is unlike specific embodiment four, the width of OLED display panel
For 40cm~45cm, the spacing between two adjacent OLED display panels is 60cm~80cm.Since OLED display panel is laid on
It is more eye-catching actually in order in the lower situation of visibility, carry out lighting display on crossing, it is driven with reminding
The attention for the person of sailing.Therefore, the setting of OLED display panel is preferably consistent with zebra crossing setting specification standards: crossing
Line is not generally preferably less than 60 degree (or being greater than 120 degree) with centerlines in special circumstances with highway central axis,
Striped Ying Yu highway centerline parallel；The minimum widith of zebra crossing should be 300cm, and can according to the volume of traffic of pedestrian with
100cm widens for level-one；The line width of zebra crossing should be 40cm~45cm, line interval is preferably 60cm, can be according to garage's road width
Degree is adjusted, but 80cm is not to be exceeded in maximum.
Other steps and parameter are identical as specific embodiment four.
Specific embodiment 6: present embodiment is unlike specific embodiment four, the OLED display panel
Display device uses VGG12864G-CM21, and the singlechip chip uses SSD1303.
Other steps and parameter are identical as specific embodiment four or five.
Specific embodiment 7: be illustrated in conjunction with Fig. 3 to present embodiment, present embodiment provide towards driver
Pedestrains safety cross the street reminding method, specifically includes the following steps:
Step 1: vehicle GPS real-time detection vehicle location, vehicle speed detector real-time detection car speed, vehicle add
Speed detector real-time detection vehicle acceleration, thermal infrared imager capture pedestrian image；The vehicle GPS, vehicle speed detection
Device, vehicle acceleration detector, thermal infrared imager are respectively by the multidate information of collected pedestrian and vehicle (including vehicle position
Set, car speed, vehicle acceleration, pedestrian image, pedestrian's speed etc.) it is transmitted to wireless transmitter, wireless transmitter will receive
To information be converted to radio signal, and be sent to information judgment means；
Step 2: information judgment means receive the multidate information that data acquisition device is sent, and by conflict judgment module root
Whether can clash according to received information analysis pedestrian and vehicle, be believed based on the received by traffic environment visibility judgment module
It ceases and determines traffic environment visibility index CBRI；
Step 3: information judgment means are mentioned to the publication of pedestrian's street crossing suggestion device when judging result, which is, to be clashed
Show instruction；When judging result is that can clash and CBRIWhen≤0.9, information judgment means are simultaneously to pedestrian's street crossing suggestion device
Hint instructions are sent with vehicle-mounted early warning distributing device；
It is shown Step 4: pedestrian's street crossing suggestion device carries out OLED when receiving the hint instructions of information judgment means transmission
Show；Vehicle-mounted early warning distributing device issues voice broadcast when receiving the hint instructions of information judgment means transmission and vibration mentions
Show.
Specific embodiment 8: present embodiment is unlike specific embodiment seven, by conflicting described in step 2
The judgment module specific steps that whether information analysis pedestrian and vehicle can clash based on the received include:
A1, using pedestrian as origin, pedestrian's direction of travel is X-axis, the direction vertical with X-axis is that Y-axis establishes coordinate system, according to
The multidate information of pedestrian and vehicle calculate pedestrian and vehicle maintain present speed to collide the required time:
Wherein, linear distance of the L between vehicle and pedestrian, VaFor Vehicle Speed, VbFor pedestrian's speed of travel, α is
The angle of vehicle and pedestrian line and pedestrian's direction of travel (X-axis), β are the angle of vehicle and pedestrian moving direction；
A2, according to the multidate information of pedestrian and vehicle, calculate vehicle and pedestrian and avoid the required time that collides:
Wherein, t1For driver reaction time, t2Start to touch on the brake for driver required when reaching maximum to vehicle braking force
The time wanted, amaxIt is the maximum deceleration of vehicle；
A3, degree of safety S=T is enableda/TbIf S > 1.5, judging result is behaved and vehicle will not clash, and is belonged at this time
Safe condition；If 1≤S≤1.5, judging result is behaved and vehicle can clash.
Other steps and parameter are identical as specific embodiment seven.
Specific embodiment 9: present embodiment is unlike specific embodiment seven or eight, described in step 2 by
Information determines traffic environment visibility index C to traffic environment visibility judgment module based on the receivedBRISpecific steps include:
B1, the ground pre-set image g (M, N) being stored in java standard library, and to the side of surface mark object in image g (M, N)
Battery limit (BL) has pre-processed, and such as adds edge labelling in surface mark object borderline region with black.By by thermal infrared imager
Real-time captured image RI and image g (M, N) the progress convolution fortune being stored in java standard library with surface mark object edge labelling
It calculates, the fringe region Γ of corresponding surface mark object can be obtained；Wherein,It is as follows to define G:
Wherein, g (i, j) is the gray value of image RI pixel at (i, j)；I, j is respectively the X axis coordinate and Y of pixel
Axial coordinate.
B2, the average brightness C for calculating fringe region G in target image RIBRI:
Wherein,Represent non-zero pixels number in G；
B3, by CBRIAs traffic environment visibility index；It enables: 0.9 < CBRI< 1, traffic environment visibility is excellent, is level-one
Standard；0.6<CBRI≤ 0.9, traffic environment poor visibility is secondary standard；0<CBRI≤ 0.6, traffic environment visibility is very
Difference is grade III Standard.
Other steps and parameter are identical as specific embodiment seven or eight.
Specific embodiment 10: present embodiment, unlike specific embodiment nine, in step 4, vehicle-mounted early warning is sent out
After cloth apparatus receives the hint instructions of information judgment means transmission, if 0.6 < CBRI≤ 0.9, voice broadcast prompt is issued, if 0 <
CBRI≤ 0.6, issue voice broadcast and vibration prompt.
Other steps and parameter are identical as specific embodiment nine.
Embodiment
Beneficial effects of the present invention are verified using following embodiment:
As shown in Fig. 2, inside the vehicle respectively install vehicle GPS, vehicle speed detector, vehicle acceleration detector,
Vehicle-mounted early warning distributing device；The road side of neighbouring stop line lay thermal infrared imager and information judgment means (stop line away from
From crossing 1M), thermal infrared imager uses Tau2640 machine core and 25mm camera lens；The segmented ground cloth on crossing
If pedestrian's street crossing suggestion device；The width of each section of OLED display panel is 45cm, between two adjacent OLED display panels between
Away from for 60cm；The display device of OLED display panel uses VGG12864G-CM21, and singlechip chip uses SSD1303；Power supply
Converter uses the TPS65137 of TI company.
Pedestrian is replaced using the plastic model being fixed on remote-control toy vehicle.
Then have:
As degree of safety S > 1.5, vehicle normal pass, vehicle-mounted early warning distributing device and pedestrian's street crossing suggestion device are not mentioned
Show；
As degree of safety 1≤S≤1.5 and 0.9 < CBRIWhen < 1, pedestrian's street crossing suggestion device carries out OLED and shows；
As degree of safety 1≤S≤1.5 and 0.6 < CBRIWhen≤0.9, pedestrian's street crossing suggestion device carries out OLED and shows,And vehicle
It carries early warning distributing device and issues voice broadcast；
As degree of safety 1≤S≤1.5 and 0 < CBRIWhen≤0.6, pedestrian's street crossing suggestion device carries out OLED and shows,And it is vehicle-mounted
Early warning distributing device issues voice broadcast and vibration prompt.
It is each in night, dusk, greasy weather, cloudy day, thundery sky respectively using the present invention with the present invention is not used
20 tests are carried out；The present invention is obvious to the prompt effect of driver, it is possible to prevente effectively from about 92% vehicle-pedestrian rushes
It is prominent, and then the generation of pedestrian crossing traffic accident can be reduced, improve pedestrian's street crossing safety.
The present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, this field
Technical staff makes various corresponding changes and modifications in accordance with the present invention, but these corresponding changes and modifications all should belong to
The protection scope of the appended claims of the present invention.
Claims (10)
1. the pedestrains safety towards driver crosses the street prompt system, which is characterized in that the system comprises: data acquisition device,
Information judgment means, vehicle-mounted early warning distributing device and pedestrian's street crossing suggestion device；
The data acquisition device is extremely believed for acquiring the multidate information of pedestrian and vehicle in real time, and by the dynamic message transmission
Cease judgment means；
The information judgment means are positioned adjacent to the road side of stop line, for receiving and processing data acquisition device transmitting
Multidate information sent out respectively to pedestrian's street crossing suggestion device and vehicle-mounted early warning distributing device according to the judging result after processing
Send hint instructions；
The pedestrian's street crossing suggestion device is arranged on crossing, for referring in the prompt for receiving the transmission of information judgment means
OLED is carried out when enabling to show；
The vehicle-mounted early warning distributing device is arranged in the car, for when receiving the hint instructions of information judgment means transmission
Issue voice broadcast and vibration prompt.
2. the pedestrains safety towards driver crosses the street prompt system according to claim 1, which is characterized in that the data are adopted
Acquisition means include vehicle GPS, vehicle speed detector, the vehicle acceleration detector of setting in the car, and setting is being believed
The neighbouring thermal infrared imager of judgment means, wireless transmitter are ceased, the vehicle GPS is used for real-time detection vehicle location, the vehicle
Speed detector is used for real-time detection car speed, and the vehicle acceleration detector is used for real-time detection vehicle acceleration；
Thermal infrared imager is for capturing pedestrian image；The vehicle GPS, vehicle speed detector, vehicle acceleration detector, infrared heat
As the multidate information of collected pedestrian and vehicle are transmitted to wireless transmitter respectively by instrument, the wireless transmitter will be for that will connect
The multidate information received is converted to radio signal, and is sent to information judgment means.
3. the pedestrains safety according to claim 1 or claim 2 towards driver crosses the street prompt system, which is characterized in that the letter
Ceasing judgment means includes conflict judgment module and traffic environment visibility judgment module；The conflict judgment module is used for according to number
Whether the information analysis pedestrian and vehicle sent according to acquisition device can clash；The traffic environment visibility judgment module is used
Traffic environment visibility index is determined in the information sent according to data acquisition device.
4. the pedestrains safety towards driver crosses the street prompt system according to claim 3, which is characterized in that pedestrian's street crossing mentions
Showing device includes single-chip microcontroller, OLED display module；The single-chip microcontroller is used for the hint instructions control sent according to information judgment means
OLED display module work processed；The OLED display module include several segmenteds be uniformly laid on OLED on crossing
Display panel.
5. the pedestrains safety towards driver crosses the street prompt system according to claim 4, which is characterized in that OLED display surface
The width of plate is 40cm~45cm, and the spacing between two adjacent OLED display panels is 60cm~80cm.
6. the pedestrains safety towards driver crosses the street prompt system according to claim 4, which is characterized in that the OLED is aobvious
Show the display device of panel using VGG12864G-CM21, the singlechip chip uses SSD1303.
7. using the method for the pedestrains safety street crossing prompt system described in claim 4~6 towards driver, which is characterized in that
It the described method comprises the following steps:
Step 1: vehicle GPS real-time detection vehicle location, vehicle speed detector real-time detection car speed, vehicle acceleration
Detector real-time detection vehicle acceleration, thermal infrared imager capture pedestrian image；The vehicle GPS, vehicle speed detector, vehicle
The multidate information of collected pedestrian and vehicle are transmitted to wireless transmitter respectively by acceleration detector, thermal infrared imager,
The information received is converted to radio signal by wireless transmitter, and is sent to information judgment means；
Step 2: information judgment means receive the multidate information that data acquisition device is sent, and by conflict judgment module according to connecing
Whether the information analysis pedestrian of receipts and vehicle can clash, and by traffic environment visibility judgment module, information is true based on the received
Determine traffic environment visibility index CBRI；
Step 3: information judgment means refer to the publication prompt of pedestrian's street crossing suggestion device when judging result, which is, to be clashed
It enables；When judging result is that can clash and CBRIWhen≤0.9, information judgment means are simultaneously to pedestrian's street crossing suggestion device and vehicle
It carries early warning distributing device and sends hint instructions；
It is shown Step 4: pedestrian's street crossing suggestion device carries out OLED when receiving the hint instructions of information judgment means transmission；
Vehicle-mounted early warning distributing device issues voice broadcast and vibration prompt when receiving the hint instructions of information judgment means transmission.
8. the pedestrains safety towards driver crosses the street reminding method according to claim 7, which is characterized in that institute in step 2
It states and includes: by the conflict judgment module specific steps that whether information analysis pedestrian and vehicle can clash based on the received
A1, according to the multidate information of pedestrian and vehicle, calculate pedestrian and when vehicle maintains present speed to collide required
Between:
Wherein, linear distance of the L between vehicle and pedestrian, Va are Vehicle Speed, and Vb is pedestrian's speed of travel, and α is vehicle
And pedestrian's line and pedestrian's direction of travel angle, β be vehicle and pedestrian moving direction angle；
A2, according to the multidate information of pedestrian and vehicle, calculate vehicle and pedestrian and avoid the required time that collides:
Wherein, t1For driver reaction time, t2Start to touch on the brake for driver required when reaching maximum to vehicle braking force
Time, amaxIt is the maximum deceleration of vehicle；
A3, degree of safety S=T is enableda/TB,If S > 1.5,Then judging result is behaved and vehicle will not clash,Belong to safe shape at this time
State；If 1≤S≤1.5, judging result is behaved and vehicle can clash.
9. the pedestrains safety according to claim 7 or 8 towards driver crosses the street reminding method, which is characterized in that step 2
Described in by traffic environment visibility judgment module, information determines traffic environment visibility index C based on the receivedBRISpecific step
Suddenly include:
B1, by by the real-time captured image RI of thermal infrared imager and being stored in java standard library with surface mark object edge labelling
Image g (M, N) carry out convolution algorithm,Obtain the fringe region Γ of corresponding surface mark object；Wherein, It is fixed
Adopted G is as follows:
Wherein, g (i, j) is gray value of the image RI at (i, j)；
B2, the average brightness C for calculating fringe region G in target image RIBRI:
Wherein, ∫G1ds represents non-zero pixels number in G；
B3, by CBRIAs traffic environment visibility index；It enables: 0.9 < CBRI< 1, traffic environment visibility is primary standard；0.6<
CBRI≤ 0.9, traffic environment visibility is secondary standard；0<CBRI≤ 0.6, traffic environment visibility is grade III Standard.
10. the pedestrains safety towards driver crosses the street reminding method according to claim 9, which is characterized in that in step 4,
After vehicle-mounted early warning distributing device receives the hint instructions of information judgment means transmission, if 0.6 < CBRI≤ 0.9, it issues voice and broadcasts
Report prompt, if 0 < CBRI≤ 0.6, issue voice broadcast and vibration prompt.
Priority Applications (1)
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| CN110428661A (en) * | 2019-08-12 | 2019-11-08 | 深圳成谷科技有限公司 | A kind of protection pedestrian crosses the method, apparatus and equipment of zebra stripes |
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| CN111951573A (en) * | 2020-07-21 | 2020-11-17 | 华设设计集团股份有限公司 | Intelligent public transportation system and method based on vehicle-road cooperation technology |
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| CN112802324A (en) * | 2021-01-12 | 2021-05-14 | 深圳市砝石激光雷达有限公司 | Pedestrian safety laser holographic protection system and method |
| CN113077654A (en) * | 2020-12-28 | 2021-07-06 | 无锡乐骐科技有限公司 | Traffic indication system based on visual identification |
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| CN113763749A (en) * | 2021-08-26 | 2021-12-07 | 智道网联科技(北京)有限公司 | Vehicle road cooperation-based real-time early warning method and device during low-speed running of vehicle |
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