CN110099499B - Wisdom urban traffic lighting control system - Google Patents

Wisdom urban traffic lighting control system Download PDF

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CN110099499B
CN110099499B CN201910364214.XA CN201910364214A CN110099499B CN 110099499 B CN110099499 B CN 110099499B CN 201910364214 A CN201910364214 A CN 201910364214A CN 110099499 B CN110099499 B CN 110099499B
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street lamp
vehicle
lighting
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line
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CN110099499A (en
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廖兴旺
黄伟鹏
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Fujian Ruis Technology Co ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/155—Coordinated control of two or more light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention discloses a smart city traffic lighting control system, which relates to the field of smart cities and comprises the following components: the system comprises a first vehicle comprising a vehicle-mounted terminal, a street lamp along the first line and a platform server; the vehicle-mounted terminal comprises a vehicle speed detection module, a GPS module, a headlamp parameter acquisition module and a vehicle-mounted communication module; the platform server comprises an illumination data acquisition module, an ambient illumination judgment module, a lighting street lamp solving module and a lighting street lamp driving module; the lighting street lamp solving module comprises a current position determining unit, an initial lighting street lamp determining unit and an ending lighting street lamp determining unit. According to the invention, the speed, the GPS position and the headlamp parameters of the first vehicle are collected and sent to the server, and after the server judges that the environmental illumination is too poor, the street lamp required to be turned on at the current road section is obtained according to the speed, the GPS position and the headlamp parameters, and the street lamp is controlled to be turned on; the invention can effectively save the electricity consumption of the street lamp and avoid the electricity consumption waste caused by the normal opening of the street lamp of the unmanned road.

Description

Wisdom urban traffic lighting control system
Technical Field
The invention relates to the field of smart cities, in particular to a smart city traffic lighting control system.
Background
The smart city integrates the city composition system and service by using various information technologies or innovative ideas, so as to improve the efficiency of resource application, optimize city management and service, and improve the quality of life of citizens.
As an important part of urban construction, roads have been rapidly developed in recent years in the urban road lighting industry. Then, the traditional street lamps still have some problems in all aspects, and the development of the intelligent city street lamp system becomes a hot spot of research in the present stage.
In the prior art, the road lighting has the following defects: in suburbs with small traffic flow, the street lamps are normally open, which causes resource waste.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is to provide an intelligent urban traffic lighting control system, aiming at realizing energy saving and emission reduction of street lamps and saving social resources by adjusting lighting control of road traffic street lamps.
In order to achieve the above object, the present invention provides a smart urban traffic lighting control system, which is characterized in that the system comprises: the system comprises a first vehicle comprising a vehicle-mounted terminal, a street lamp along the first line and a platform server;
the vehicle-mounted terminal comprises a vehicle speed detection module, a GPS module, a headlamp parameter acquisition module and a vehicle-mounted communication module; the vehicle speed detection module is used for detecting a first vehicle speed of the first vehicle; the GPS module is used for acquiring first GPS position information of the first vehicle; the headlamp parameter acquiring module is used for acquiring a first inclination angle formed by the irradiation direction of a first headlamp of the first vehicle and a vehicle body and acquiring the headlamp height of the first headlamp of the first vehicle relative to the bottom of a tire; the vehicle-mounted communication module is used for sending the first vehicle speed, the first GPS position information, the first inclination angle and the headlamp height to the platform server;
the platform server comprises an illumination data acquisition module, an ambient illumination judgment module, a lighting street lamp solving module and a lighting street lamp driving module;
the illumination data acquisition module is used for sending an illumination data acquisition instruction to a first street lamp of the first line matched with the first GPS position information according to the first GPS position information;
the top of the street lamp along the line is provided with a first image acquisition module;
the first image acquisition module is used for acquiring a first aerial image in the vertical upward direction of the street lamp along the line and sending the first aerial image to the platform server;
the ambient lighting judgment module is used for acquiring the gray value G of each pixel point of the first aerial imagekAccording to the gray value G of each pixel pointkSolving the mean value of the gray levels
Figure GDA0002722795940000021
Wherein, k is 1,2Number of pixels of the first aerial image, the
Figure GDA0002722795940000022
The lighting street lamp solving module comprises a current position determining unit, an initial lighting street lamp determining unit and an ending lighting street lamp determining unit;
the current position determining unit is used for determining the first route where the first vehicle is located according to the first GPS position information in response to the fact that the gray average value of the first aerial image is smaller than the first preset value, and determining the current position of the first vehicle on the first route;
the initial lighting street lamp determining unit is used for selecting an initial lighting street lamp L from street lamps along the line on the first line according to the first inclination angle and the current positionq(ii) a The street lamps along the first line comprise at least two lighting street lamps LiN, where N is a total number of lighting streetlamps, and a distance D between the initial lighting street lamp and the current location of the first vehicle is equal to 1,2qSatisfies the following conditions:
Figure GDA0002722795940000031
said DiFor each of the illuminating street lamps LiA distance from the current location of the first vehicle,
Figure GDA0002722795940000032
is a pair of
Figure GDA0002722795940000033
Taking a minimum value, wherein theta is the first inclination angle, and theta is greater than 0;
the lighting-finished street lamp determining unit is used for selecting a lighting-finished street lamp L from street lamps along the first line according to the first vehicle speed v of the first vehiclej(ii) a 1,2, N, q < j, the end-of-lighting street lamp and the current location of the first vehicleDistance DjSatisfies the following conditions: i Dj-v(T+τ)|＝min(|Di-v(T+τ)|)；min(|Di-v (T + τ) |) is for | Di-v (T + τ) | is the minimum value, wherein T is the preset vehicle braking reserved time before and after the vehicle is braked, and τ is the preset network delay;
the lighting street lamp driving module is used for lighting the street lamp L according to the starting pointqAnd the lighting-end street lamp LjSending a first remote control instruction to the street lamps along the line to control the street lamps L starting to light up along the lineqTo the end of lighting the street lamp LjThe street lamps along the line are in an open state.
In the technical scheme, the speed, the GPS position and the headlamp parameters of the first vehicle are collected and sent to the server, after the server judges that the environmental illumination is too poor, the street lamp needing to be opened on the current road section is obtained according to the speed, the GPS position and the headlamp parameters, and the street lamp is controlled to be turned on. Meanwhile, in the technical scheme, the road lamp L which is finished to be lighted along the road lamp is obtained according to the first inclination angle of the headlamp, the current position of the first vehicle and the first vehicle speedjAnd initial lighting of the street lamp LqThe street lamp needing to be lightened is effectively obtained, on one hand, the driving illumination requirement is guaranteed, and meanwhile, the phenomenon that too many street lamps are lightened is avoided, so that energy conservation and emission reduction are realized. In addition, this technical scheme adopts remote control and on-vehicle speed measuring scheme, reduces street lamp end sensor's use, reduces the hardware cost.
In a specific embodiment, the system further comprises: the photosensitive sensor is arranged on the street lamp along the line;
the photosensitive sensor is used for acquiring the illumination brightness of the road surface of the area where the illumination street lamp is located, reserving a corresponding timestamp, and sending the illumination brightness and the corresponding timestamp to the platform server;
the platform server also comprises a storage module; the storage module is used for storing the illumination brightness and the corresponding time stamp.
In the embodiment, the illumination data is stored, so that the subsequent manual fault reference and analysis are facilitated.
In a specific embodiment, the platform server further includes: and the street lamp passing closing module is used for closing the street lamps along the line on the first passing line according to the first GPS position information.
In the embodiment, the street lamps are turned off in the passed area, so that energy conservation and emission reduction are realized.
In one embodiment, the street lights along the line include an off state, a low light state, and the on state;
the platform server further comprises: the street lamp off-state driving module; the street lamp off-state driving module is used for responding that the gray average value of the first aerial image is larger than or equal to the first preset value, sending a second remote control instruction to the street lamp along the line, and controlling the street lamp along the line to be in an off state or a low-illumination state.
In a particular embodiment, the first headlight comprises a low beam, a high beam and/or an adjustable angle headlight.
In a specific embodiment, the preset front and rear vehicle brake reserved time T satisfies: t is more than or equal to 2s and less than or equal to 6 s.
In a specific embodiment, the first inclination angle is an included angle formed between a central axis of the first headlamp and the vehicle body.
Based on the scheme, the sufficient illumination brightness of the running vehicle is ensured.
In a specific embodiment, the first inclination angle is an included angle formed by a connecting line between the first headlamp and a farthest irradiation point of the first headlamp on the ground and the vehicle body.
Based on this scheme, the light and the street lamp light of head-light link up, and can not cause the illumination intensity too high.
The invention has the beneficial effects that: the invention collects the speed, the GPS position and the headlamp parameter of the first vehicle and sends the parameters to the server for serviceAfter the device judges that the environmental illumination is too poor, the street lamp needing to be opened on the current road section is obtained according to the vehicle speed, the GPS position and the headlamp parameters, and the street lamp is controlled to be turned on. Meanwhile, according to the first inclination angle of the headlamp, the current position of the first vehicle and the first vehicle speed, the lighting-finished street lamp L along the street lamp is obtainedjAnd initial lighting of the street lamp LqThe street lamp needing to be lightened is effectively obtained, on one hand, the driving illumination requirement is guaranteed, and meanwhile, the phenomenon that too many street lamps are lightened is avoided, so that energy conservation and emission reduction are realized. In addition, the table endocrine adopts remote control and on-vehicle speed measuring scheme, reduces street lamp end sensor's use, reduces the hardware cost.
Drawings
Fig. 1 is a system block diagram of a smart urban traffic lighting control system according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a smart city remote lighting data acquisition and brightness control method according to an embodiment of the present invention;
fig. 3 is a block diagram of a lighting street lamp solving module according to an embodiment of the present invention;
fig. 4 is a setting diagram of first tilt angle selection in different examples.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 4, in a first embodiment of the present invention, a method for smart city remote lighting data acquisition and brightness control is provided, the method comprising:
step S1, detecting a first vehicle speed of a first vehicle by a vehicle-mounted terminal, acquiring first GPS position information of the first vehicle, acquiring a first inclination angle formed by the irradiation direction of a first headlamp of the first vehicle and a vehicle body, and acquiring the headlamp height of the first headlamp of the first vehicle relative to the bottom of a tire; the vehicle-mounted terminal sends the first vehicle speed, the first GPS position information, the first inclination angle and the headlamp height to the platform server;
step S2, the platform server sends an illumination data acquisition instruction to a first street lamp of a first line matched with the first GPS position information according to the first GPS position information; a first image acquisition sensor arranged at the top of the first street lamp acquires a first aerial image, and the first street lamp sends the first aerial image to a platform server; the shooting direction of the first image acquisition sensor is vertical upwards;
step S3, the platform server obtains the gray value G of each pixel point of the first aerial imagekAccording to the gray value G of each pixel pointkSolving the mean value of the gray levels
Figure GDA0002722795940000061
Judging whether the gray average value of the first aerial image is smaller than a first preset value or not; if the gray-scale average value of the first aerial image is smaller than the first preset value, executing step S4; wherein k is 1,2
Figure GDA0002722795940000062
Step S4, the platform server determines the first route where the first vehicle is located according to the first GPS position information, and determines the current position of the first vehicle on the first route; the platform server selects an initial lighting street lamp L from street lamps along the first line according to the first inclination angle and the current positionq(ii) a The platform server selects street lamps L which are finished to be lightened from street lamps along the first line according to the first vehicle speed v of the first vehiclej(ii) a Wherein the street lamps along the first line comprise at least two lighting street lamps LiThe i is 1,2,. -, N, the q is 1,2,. -, N, the j is 1,2,.. -, N, the q is less than j, and N is the total number of the lighting street lamps; the initial lighting street lamp and the current position of the first vehicleA distance D betweenqSatisfies the following conditions:
Figure GDA0002722795940000071
a distance D between the end-of-lighting street lamp and the current position of the first vehiclejSatisfies the following conditions: i Dj-v(T+τ)|＝min(|Di-v (T + τ) |); said DiFor each of the illuminating street lamps LiA distance from the current location of the first vehicle,
Figure GDA0002722795940000072
is a pair of
Figure GDA0002722795940000073
Take the minimum value, min (| D)i-v (T + τ) |) is for | Di-v (T + τ) | takes a minimum value, T is a preset front and rear vehicle brake reserved time, τ is a preset network delay, θ is the first inclination angle, and θ is greater than 0;
step S5, the platform server lights the street lamp L according to the starting pointqAnd the lighting-end street lamp LjSending a first remote control instruction to the street lamps along the line to control the street lamps L starting to light up along the lineqTo the end of lighting the street lamp LjThe street lamps along the line are in an open state.
In the technical scheme, the speed, the GPS position and the headlamp parameters of the first vehicle are collected and sent to the server, after the server judges that the environmental illumination is too poor, the street lamp needing to be opened on the current road section is obtained according to the speed, the GPS position and the headlamp parameters, and the street lamp is controlled to be turned on. Meanwhile, in the technical scheme, the road lamp L which is finished to be lighted along the road lamp is obtained according to the first inclination angle of the headlamp, the current position of the first vehicle and the first vehicle speedjAnd initial lighting of the street lamp LqThe street lamp needing to be lightened is effectively obtained, on one hand, the driving illumination requirement is guaranteed, and meanwhile, the phenomenon that too many street lamps are lightened is avoided, so that energy conservation and emission reduction are realized. In addition to this, the present invention is,this technical scheme adopts remote control and on-vehicle speed measuring scheme, reduces the use of street lamp end sensor, reduces the hardware cost.
Except for the pre-judgment, the most direct and effective method for avoiding rear-end collision is to keep the safe driving distance of 3 seconds. The "3-second rule" was originally developed from the "2-second rule" popular in north america, which is a safety separation distance derived from a human reaction speed (time) + time from the brake pedal depression to the brake application and time from the vehicle brake start to the stop. Tests prove that the brake-braking distance of the vehicle speed of 36km/h is 3.5m, and the brake-braking distance of 54km/h is increased to 13m and is far greater than the distance understood by people at ordinary times. Therefore, a safe driving distance of 3 seconds is kept when the vehicle is driven. If the road surface is slippery or the line of sight is poor, the safety interval should be increased to 6 seconds.
In this embodiment, the preset front and rear vehicle brake reserved time T satisfies: t is more than or equal to 2s and less than or equal to 6 s.
Typically, the preset front and rear vehicle brake reserved time T is set to 3 seconds.
Optionally, in this embodiment, the first inclination angle is an included angle formed between the central axis of the first headlamp and the vehicle body, such as an included angle θ in fig. 41. Based on the scheme, the sufficient illumination brightness of the running vehicle is ensured.
In another preferred embodiment, the first inclination angle is an included angle formed by a connecting line between the first headlamp and the farthest irradiation point of the first headlamp on the ground and the vehicle body, such as an included angle θ in fig. 42. Based on this scheme, the light and the street lamp light of head-light link up, and can not cause the illumination intensity too high.
In a first embodiment of the present invention, the method further comprises:
the method comprises the steps that a photosensitive sensor collects the illumination brightness of the road surface of the area where the illumination street lamp is located, a corresponding timestamp is reserved, and the illumination brightness and the corresponding timestamp are sent to a platform server; the platform server stores the lighting intensity and the corresponding timestamp.
In the embodiment, the illumination data is stored, so that the subsequent manual fault reference and analysis are facilitated.
In a first embodiment of the present invention, the method further comprises:
and step S6, turning off the street lamps along the line on the first line which has passed through according to the first GPS position information.
In the embodiment, the street lamps are turned off in the passed area, so that energy conservation and emission reduction are realized.
In a first embodiment of the invention, the first headlight comprises a low beam, a high beam and/or an adjustable angle headlight.
In a first embodiment of the invention, the along-line street lamp comprises an off state, a low-light state and the on state; the step S3 further includes:
and if the gray average value of the first aerial image is greater than or equal to the first preset value, the platform server sends a second remote control instruction to the street lamp along the line to control the street lamp along the line to be in a closed state or a low illumination state.
In a second embodiment of the present invention, as shown in fig. 1-4, there is provided a smart urban traffic lighting control system, comprising: the system comprises a first vehicle comprising a vehicle-mounted terminal, a street lamp along the first line and a platform server;
the vehicle-mounted terminal comprises a vehicle speed detection module, a GPS module, a headlamp parameter acquisition module and a vehicle-mounted communication module; the vehicle speed detection module is used for detecting a first vehicle speed of the first vehicle; the GPS module is used for acquiring first GPS position information of the first vehicle; the headlamp parameter acquiring module is used for acquiring a first inclination angle formed by the irradiation direction of a first headlamp of the first vehicle and a vehicle body and acquiring the headlamp height of the first headlamp of the first vehicle relative to the bottom of a tire; the vehicle-mounted communication module is used for sending the first vehicle speed, the first GPS position information, the first inclination angle and the headlamp height to the platform server;
the platform server comprises an illumination data acquisition module, an ambient illumination judgment module, a lighting street lamp solving module and a lighting street lamp driving module;
the illumination data acquisition module is used for sending an illumination data acquisition instruction to a first street lamp of the first line matched with the first GPS position information according to the first GPS position information;
the top of the street lamp along the line is provided with a first image acquisition module;
the first image acquisition module is used for acquiring a first aerial image in the vertical upward direction of the street lamp along the line and sending the first aerial image to the platform server;
the ambient lighting judgment module is used for acquiring the gray value G of each pixel point of the first aerial imagekAccording to the gray value G of each pixel pointkSolving the mean value of the gray levels
Figure GDA0002722795940000101
Wherein k is 1,2
Figure GDA0002722795940000102
The lighting street lamp solving module comprises a current position determining unit, an initial lighting street lamp determining unit and an ending lighting street lamp determining unit;
the current position determining unit is used for determining the first route where the first vehicle is located according to the first GPS position information in response to the fact that the gray average value of the first aerial image is smaller than the first preset value, and determining the current position of the first vehicle on the first route;
the initial lighting street lamp determining unit is used for selecting an initial lighting street lamp L from street lamps along the line on the first line according to the first inclination angle and the current positionq(ii) a The street lamps along the first line comprise at least two lighting street lamps LiN, wherein i is 1,2, 1, and q is 1,n, where N is a total number of lighting streetlamps, a distance D between the initial lighting street lamp and the current location of the first vehicleqSatisfies the following conditions:
Figure GDA0002722795940000103
said DiFor each of the illuminating street lamps LiA distance from the current location of the first vehicle,
Figure GDA0002722795940000104
is a pair of
Figure GDA0002722795940000105
Taking a minimum value, wherein theta is the first inclination angle, and theta is greater than 0;
the lighting-finished street lamp determining unit is used for selecting a lighting-finished street lamp L from street lamps along the first line according to the first vehicle speed v of the first vehiclej(ii) a J is 1,2, N, q is less than j, a distance D between the end-of-lighting street lamp and the current position of the first vehiclejSatisfies the following conditions: i Dj-v(T+τ)|＝min(|Di-v(T+τ)|)；min(|Di-v (T + τ) |) is for | Di-v (T + τ) | is the minimum value, wherein T is the preset vehicle braking reserved time before and after the vehicle is braked, and τ is the preset network delay;
the lighting street lamp driving module is used for lighting the street lamp L according to the starting pointqAnd the lighting-end street lamp LjSending a first remote control instruction to the street lamps along the line to control the street lamps L starting to light up along the lineqTo the end of lighting the street lamp LjThe street lamps along the line are in an open state.
According to the embodiment, the speed, the GPS position and the headlamp parameters of the first vehicle are collected and sent to the server, after the server judges that the environmental illumination is too poor, the street lamp needing to be opened on the current road section is obtained according to the speed, the GPS position and the headlamp parameters, and the street lamp is controlled to be turned onElectricity is wasted. Meanwhile, in the technical scheme, the road lamp L which is finished to be lighted along the road lamp is obtained according to the first inclination angle of the headlamp, the current position of the first vehicle and the first vehicle speedjAnd initial lighting of the street lamp LqThe street lamp needing to be lightened is effectively obtained, on one hand, the driving illumination requirement is guaranteed, and meanwhile, the phenomenon that too many street lamps are lightened is avoided, so that energy conservation and emission reduction are realized. In addition, this technical scheme adopts remote control and on-vehicle speed measuring scheme, reduces street lamp end sensor's use, reduces the hardware cost.
In a second embodiment of the present invention, the system further comprises: the photosensitive sensor is arranged on the street lamp along the line;
the photosensitive sensor is used for acquiring the illumination brightness of the road surface of the area where the illumination street lamp is located, reserving a corresponding timestamp, and sending the illumination brightness and the corresponding timestamp to the platform server;
the platform server also comprises a storage module; the storage module is used for storing the illumination brightness and the corresponding time stamp.
In the embodiment, the illumination data is stored, so that the subsequent manual fault reference and analysis are facilitated.
In a second embodiment of the present invention, the platform server further includes: and the street lamp passing closing module is used for closing the street lamps along the line on the first passing line according to the first GPS position information.
In the embodiment, the street lamps are turned off in the passed area, so that energy conservation and emission reduction are realized.
Preferably, in this embodiment, the street lamp along the line includes an off state, a low illumination state, and the on state;
the platform server further comprises: the street lamp off-state driving module; the street lamp off-state driving module is used for responding that the gray average value of the first aerial image is larger than or equal to the first preset value, sending a second remote control instruction to the street lamp along the line, and controlling the street lamp along the line to be in an off state or a low-illumination state.
Optionally, the first headlight comprises a low beam, a high beam and/or an adjustable angle headlight.
Except for the pre-judgment, the most direct and effective method for avoiding rear-end collision is to keep the safe driving distance of 3 seconds. The "3-second rule" was originally developed from the "2-second rule" popular in north america, which is a safety separation distance derived from a human reaction speed (time) + time from the brake pedal depression to the brake application and time from the vehicle brake start to the stop. Tests prove that the brake-braking distance of the vehicle speed of 36km/h is 3.5m, and the brake-braking distance of 54km/h is increased to 13m and is far greater than the distance understood by people at ordinary times. Therefore, a safe driving distance of 3 seconds is kept when the vehicle is driven. If the road surface is slippery or the line of sight is poor, the safety interval should be increased to 6 seconds.
In a second embodiment of the present invention, the preset front and rear vehicle brake reserved time T satisfies: t is more than or equal to 2s and less than or equal to 6 s.
Typically, the preset front and rear vehicle brake reserved time T is set to 3 seconds.
Optionally, in this embodiment, the first inclination angle is an included angle formed between the central axis of the first headlamp and the vehicle body, such as an included angle θ in fig. 41。
Based on the scheme, the sufficient illumination brightness of the running vehicle is ensured.
Optionally, in another embodiment, the first inclination angle is an included angle formed by a connecting line between the first headlamp and the farthest irradiation point of the first headlamp on the ground and the vehicle body, such as an included angle θ in fig. 42。
Based on this scheme, the light and the street lamp light of head-light link up, and can not cause the illumination intensity too high.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (8)

1. A smart urban traffic lighting control system, characterized in that it comprises: the system comprises a first vehicle comprising a vehicle-mounted terminal, a street lamp along the first line and a platform server;
the vehicle-mounted terminal comprises a vehicle speed detection module, a GPS module, a headlamp parameter acquisition module and a vehicle-mounted communication module; the vehicle speed detection module is used for detecting a first vehicle speed of the first vehicle; the GPS module is used for acquiring first GPS position information of the first vehicle; the headlamp parameter acquiring module is used for acquiring a first inclination angle formed by the irradiation direction of a first headlamp of the first vehicle and a vehicle body and acquiring the headlamp height of the first headlamp of the first vehicle relative to the bottom of a tire; the vehicle-mounted communication module is used for sending the first vehicle speed, the first GPS position information, the first inclination angle and the headlamp height to the platform server;
the platform server comprises an illumination data acquisition module, an ambient illumination judgment module, a lighting street lamp solving module and a lighting street lamp driving module;
the illumination data acquisition module is used for sending an illumination data acquisition instruction to a first street lamp of the first line matched with the first GPS position information according to the first GPS position information;
the top of the street lamp along the line is provided with a first image acquisition module;
the first image acquisition module is used for acquiring a first aerial image in the vertical upward direction of the street lamp along the line and sending the first aerial image to the platform server;
the ambient lighting judgment module is used for acquiring the gray value G of each pixel point of the first aerial imagekAccording to the gray value G of each pixel pointkSolving the mean value of the gray levels
Figure FDA0002722795930000011
Wherein k is 1,2
Figure FDA0002722795930000012
The lighting street lamp solving module comprises a current position determining unit, an initial lighting street lamp determining unit and an ending lighting street lamp determining unit;
the current position determining unit is used for determining the first route where the first vehicle is located according to the first GPS position information in response to the fact that the gray average value of the first aerial image is smaller than a first preset value, and determining the current position of the first vehicle on the first route;
the initial lighting street lamp determining unit is used for selecting an initial lighting street lamp L from street lamps along the line on the first line according to the first inclination angle and the current positionq(ii) a The street lamps along the first line comprise at least two lighting street lamps LiN, where N is a total number of lighting streetlamps, and a distance D between the initial lighting street lamp and the current location of the first vehicle is equal to 1,2qSatisfies the following conditions:
Figure FDA0002722795930000021
said DiFor each of the illuminating street lamps LiA distance from the current location of the first vehicle,
Figure FDA0002722795930000022
is a pair of
Figure FDA0002722795930000023
Taking a minimum value, wherein theta is the first inclination angle, and theta is greater than 0;
the lighting-finished street lamp determining unit is used for selecting a lighting-finished street lamp L from street lamps along the first line according to the first vehicle speed v of the first vehiclej(ii) a J is 1,2, N, q is less than j, a distance D between the end-of-lighting street lamp and the current position of the first vehiclejSatisfies the following conditions: i Dj-v(T+τ)|＝min(|Di-v(T+τ)|)；min(|Di-v (T + τ) |) is for | Di-v (T + τ) | is the minimum value, wherein T is the preset vehicle braking reserved time before and after the vehicle is braked, and τ is the preset network delay;
the lighting street lamp driving module is used for lighting the street lamp L according to the starting pointqAnd the lighting-end street lamp LjSending a first remote control instruction to the street lamps along the line to control the street lamps L starting to light up along the lineqTo the end of lighting the street lamp LjThe street lamps along the line are in an open state.
2. The intelligent urban traffic lighting control system according to claim 1, wherein said system further comprises: the photosensitive sensor is arranged on the street lamp along the line;
the photosensitive sensor is used for acquiring the illumination brightness of the road surface of the area where the illumination street lamp is located, reserving a corresponding timestamp, and sending the illumination brightness and the corresponding timestamp to the platform server;
the platform server also comprises a storage module; the storage module is used for storing the illumination brightness and the corresponding time stamp.
3. The intelligent city traffic lighting control system of claim 1 wherein the platform server further comprises: and the street lamp passing closing module is used for closing the street lamps along the line on the first passing line according to the first GPS position information.
4. The intelligent city traffic lighting control system of claim 1 wherein the along-line street lights include an off state, a low light state, and the on state;
the platform server further comprises: the street lamp off-state driving module; the street lamp off-state driving module is used for responding that the gray average value of the first aerial image is larger than or equal to the first preset value, sending a second remote control instruction to the street lamp along the line, and controlling the street lamp along the line to be in an off state or a low-illumination state.
5. The system as claimed in claim 1, wherein the first headlight comprises a low beam, a high beam and/or an angle adjustable headlight.
6. The intelligent urban traffic lighting control system according to claim 1, wherein the preset front and rear vehicle braking reserved time T satisfies: t is more than or equal to 2s and less than or equal to 6 s.
7. The system of claim 1, wherein the first angle is an angle between a central axis of the first head lamp and the vehicle body.
8. The system as claimed in claim 1, wherein the first inclination angle is an angle formed by a connection line between the first head lamp and a farthest irradiation point of the first head lamp on the ground and the vehicle body.
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