CN108237967B

CN108237967B - Method and equipment for controlling light

Info

Publication number: CN108237967B
Application number: CN201611207820.3A
Authority: CN
Inventors: 王海坤
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT
Priority date: 2016-12-23
Filing date: 2016-12-23
Publication date: 2021-06-08
Anticipated expiration: 2036-12-23
Also published as: CN108237967A

Abstract

The invention relates to the technical field of wireless communication, in particular to a method and equipment for controlling light, which are used for solving the problems that the switching of high beam and low beam lights of the existing vehicle can only be manually controlled by a driver, and the switching of the high beam and the low beam lights is often forgotten, so that the driving safety of the vehicle is reduced. The vehicle-mounted equipment determines light switching information according to a set first high-low beam use condition set, or receives the light switching information from road side equipment in a wireless mode, and controls headlamps of a target vehicle according to the light switching information, wherein the target vehicle is a vehicle where the vehicle-mounted equipment is located. Because the vehicle-mounted equipment can control the headlamp of the target vehicle according to the light switching information, manual control by a driver is not needed, the frequency of occurrence of the situation that the high beam and the low beam are forgotten to be switched is reduced, and the driving safety of the vehicle is improved.

Description

Method and equipment for controlling light

Technical Field

The invention relates to the technical field of wireless communication, in particular to a method and equipment for controlling light.

Background

Automotive headlamps, also known as automotive headlamps, are closely coupled to safe driving at night or under bad weather conditions.

However, if the high beam is used during driving at night, serious potential safety hazard can be brought during meeting. Experiments show that the high beam meeting can cause the driver to blindly instantly, the light of the high beam is too strong, the eyes of the driver are easy to blindly instantly when meeting, the time is generally recovered to the original 2-3 seconds with high eyesight, the automobile needs to travel a long distance within 2 seconds, and if the speed is calculated according to 120 kilometers per hour, the automobile can travel a distance of about 66 meters within 2 seconds.

The high beam and low beam of present vehicle switches and relies on driver manual control, if the driver opens behind the high beam, does not in time switch back the dipped headlight, for example forgets to turn on the high beam, can lead to the fact harm to syntropy and opposite vehicle travel.

In summary, the conventional vehicle high beam and low beam switching can only be controlled manually by a driver, and the high beam and the low beam are often forgotten to be switched, so that the driving safety of the vehicle is reduced.

Disclosure of Invention

The invention provides a method and equipment for controlling light, which are used for solving the problems that the switching of high beam and low beam lights of the existing vehicle can only be manually controlled by a driver, and the switching of the high beam and the low beam lights is often forgotten, so that the driving safety of the vehicle is reduced.

The embodiment of the invention provides a method for controlling light, which comprises the following steps:

the method comprises the steps that the vehicle-mounted equipment determines lamplight switching information according to a set first high-low beam use condition set, or receives lamplight switching information from roadside equipment in a wireless mode, wherein the received lamplight switching information is determined by the roadside equipment according to a set second high-low beam use condition set;

and the vehicle-mounted equipment controls the headlamp of the target vehicle according to the light switching information, wherein the target vehicle is the vehicle where the vehicle-mounted equipment is located.

Optionally, the on-board device determines the light switching information according to the set first high-low beam usage condition, including:

the vehicle-mounted equipment determines a first high-low beam use condition which is currently met from the first high-low beam use condition set;

and the vehicle-mounted equipment determines the light switching information corresponding to the first high-low beam service condition which is met currently according to the corresponding relation between the first high-low beam service condition and the light switching information.

Optionally, the determining, by the vehicle-mounted device, a first far-near light usage condition currently met from the first far-near light usage condition set includes:

the vehicle-mounted equipment determines a first high-low beam use condition which is currently met from the first high-low beam use condition set according to condition information;

wherein the condition information includes part or all of the following information:

the vehicle state information of the target vehicle, the first environment information of the target vehicle and the vehicle state information of other vehicles received in a wireless mode.

Optionally, before the vehicle-mounted device determines the light switching information according to the set first high-low beam usage condition, the method further includes:

and the vehicle-mounted equipment broadcasts the vehicle state information of the target vehicle in a wireless mode.

Optionally, the vehicle state information includes part or all of the following information:

vehicle position, vehicle speed, vehicle acceleration, vehicle direction of travel, and vehicle headlamp state;

the first environment information includes some or all of the following information:

weather information, external light information.

aiming at any vehicle in the coverage range of the road side equipment, the road side equipment determines light switching information corresponding to the vehicle according to a set second high and low beam use condition set;

and the road side equipment informs the vehicle of the light switching information in a wireless mode so that the vehicle controls the headlamps according to the light switching information.

Optionally, for any vehicle within the coverage of the roadside device, the roadside device determines, according to the set second high-low beam use condition set, light switching information corresponding to the vehicle, including:

for any vehicle within the coverage range of the roadside device, the roadside device determines a second high beam and low beam use condition which is currently met from the second high beam and low beam use condition set;

and the roadside equipment determines the light switching information corresponding to the second high-low beam service condition which is currently met according to the corresponding relation between the second high-low beam service condition and the light switching information.

Optionally, for any vehicle within the coverage of the roadside apparatus, the roadside apparatus determining a second high beam and low beam usage condition currently satisfied from the second high beam and low beam usage condition set, including:

and for any vehicle in the coverage range of the road side equipment, the road side equipment determines the currently satisfied second high and low beam use condition from the second high and low beam use condition set according to the second environment information and the received vehicle state information of part or all vehicles in the coverage range.

the second environment information includes part or all of the following information:

external light information, position information of the roadside device, and weather information.

The embodiment of the invention provides a vehicle-mounted device for controlling light, which comprises:

the first information determining module is used for determining lamplight switching information according to a set first high-low beam use condition set or receiving the lamplight switching information from road side equipment in a wireless mode, wherein the received lamplight switching information is determined by the road side equipment according to a set second high-low beam use condition set;

and the control module is used for controlling the headlamp of the target vehicle according to the light switching information, wherein the target vehicle is the vehicle where the vehicle-mounted equipment is located.

Optionally, the first information determining module is specifically configured to:

determining a first far-near light use condition which is currently met from the first far-near light use condition set;

and determining the light switching information corresponding to the first high and low beam use condition which is met currently according to the corresponding relation between the first high and low beam use condition and the light switching information.

according to condition information, determining a first far and near light use condition which is currently met from the first far and near light use condition set;

Optionally, the first information determining module is further configured to:

and broadcasting the vehicle state information of the target vehicle in a wireless mode.

weather information, external light information.

The embodiment of the invention provides road side equipment for controlling light, which comprises:

the second information determining module is used for determining light switching information corresponding to any one vehicle in the coverage range of the road side equipment according to a set second high and low beam use condition set;

and the notification module is used for wirelessly notifying the vehicle of the light switching information so as to control the headlamp by the vehicle according to the light switching information.

Optionally, the second information determining module is specifically configured to:

determining a second high beam and low beam using condition which is currently met from the second high beam and low beam using condition set aiming at any vehicle in the coverage range of the road side equipment;

and determining the light switching information corresponding to the second high-low beam service condition which is met currently according to the corresponding relation between the second high-low beam service condition and the light switching information.

and for any vehicle in the coverage range of the road side equipment, determining a second high beam and low beam use condition which is currently met from the second high beam and low beam use condition set according to second environment information and the received vehicle state information of part or all vehicles in the coverage range.

The vehicle-mounted equipment determines light switching information according to a set first high-low beam use condition set, or receives the light switching information from road side equipment in a wireless mode, and controls headlamps of a target vehicle according to the light switching information, wherein the target vehicle is a vehicle where the vehicle-mounted equipment is located. Because the vehicle-mounted equipment can control the headlamp of the target vehicle according to the light switching information, manual control by a driver is not needed, the frequency of occurrence of the situation that the high beam and the low beam are forgotten to be switched is reduced, and the driving safety of the vehicle is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic flow chart of a method for controlling light by a single-vehicle mode vehicle-mounted device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a vehicle transmitting information in a single mode according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a vehicle state linked list in a single mode according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart illustrating a method for a vehicle to transmit information in a single-vehicle mode according to an embodiment of the present invention;

FIG. 5 is a schematic flow chart illustrating a method for controlling lighting in a roadside mode according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of information transmission of a road side mode vehicle according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a road side mode vehicle state linked list according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a delay calculation according to an embodiment of the present invention;

FIG. 9 is a schematic flow chart of a method for controlling light by roadside mode vehicle-mounted equipment according to an embodiment of the invention;

FIG. 10 is a schematic flow chart illustrating a method for assisting light control by roadside equipment in a roadside mode according to an embodiment of the invention;

FIG. 11 is a schematic structural diagram of a first vehicle-mounted device according to an embodiment of the invention;

FIG. 12 is a schematic structural diagram of a first roadside apparatus according to an embodiment of the invention;

FIG. 13 is a structural diagram of a second vehicle-mounted device according to the embodiment of the invention;

fig. 14 is a schematic structural diagram of a roadside apparatus according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The WIreless mode of the embodiment of the present invention includes, but is not limited to, a mobile WIreless network (for example, 2G, 3G, 4G, 5G, LTE (Long Term Evolution, V2X (vehicle-to-Everything), DSRC (Dedicated Short Range Communications), etc.), a WIFI (WIreless-connectivity) network, etc.

The embodiment of the invention provides two modes: one is a bicycle mode and one is a roadside mode.

In the single-vehicle mode, the vehicle-mounted equipment determines light switching information and controls the headlamps according to the light switching information;

the road side mode is that road side equipment determines light switching information and informs vehicle-mounted equipment in a coverage area to control headlamps according to the light switching information.

The roadside equipment is fixedly arranged on a road, and the specific position can be determined according to the requirement, for example, the roadside equipment can be arranged on a highway, an intersection, a bridge, fewer street lamps and the like.

In practice, the vehicle-only mode, the road-side mode, or both the vehicle-only mode and the road-side mode may be used.

And only using the bicycle mode is that the vehicle-mounted equipment does not operate when receiving the light switching information of the road side equipment, and the headlamp is controlled only according to the light switching information determined by the vehicle-mounted equipment.

The roadside mode is only used for controlling the headlamps according to the received lamplight switching information of the roadside equipment.

The combined use of the bicycle mode and the roadside mode is that the vehicle-mounted equipment determines light switching information, the headlamps are controlled according to the determined light switching information, and if the light switching information of the roadside equipment is received, the headlamps are controlled according to the received light switching information of the roadside equipment. That is, in this way, if the light switching information of the roadside device is not received within the time set by the system, the headlamps are controlled according to the light switching information determined by the vehicle-mounted device, and if the light switching information of the roadside device is received, the headlamps are controlled according to the received light switching information.

In implementation, a switch can be arranged on the vehicle-mounted equipment, and if a user selects to turn on the switch, the vehicle-mounted equipment controls the headlamp by adopting the mode of the embodiment of the invention; if the user selects to turn off, the vehicle-mounted equipment controls the headlamp without adopting the mode of the embodiment of the invention, and the user manually controls the headlamp.

The following describes the bicycle mode and the road side mode of the embodiment of the present invention, respectively.

First, the bicycle mode.

As shown in fig. 1, a method for controlling light of a single vehicle mode vehicle-mounted device in an embodiment of the present invention includes:

step 100, the vehicle-mounted equipment determines light switching information according to a set first high-low beam use condition set, wherein the received light switching information is determined by the roadside equipment according to a set second high-low beam use condition set;

and step 101, the vehicle-mounted equipment controls the headlamp of the target vehicle according to the light switching information, wherein the target vehicle is the vehicle where the vehicle-mounted equipment is located.

In the embodiment of the present invention, a plurality of first high-low beam usage conditions are preset, a first high-low beam usage condition set is formed and configured in each vehicle-mounted device, and in a subsequent usage process, the vehicle-mounted device may further update, including deletion, replacement, addition, and the like, the first high-low beam usage condition in the first high-low beam usage condition set in a wired or wireless manner.

The first high beam and low beam use conditions of the embodiment of the invention can be set according to laws and regulations of the location of the vehicle, use habits of users of the location of the vehicle and the like.

For example, taking the "road traffic safety law of the people's republic of China" as an example, the following regulations are provided for the use of the automotive headlamp:

1. the front lamp can be turned on when the vehicle runs in heavy fog, and the high beam lamp is prohibited to be turned on when the distance between the rear vehicle and the front vehicle is closer when the vehicle runs in the same direction;

2. when the vehicle is driven on the highway in the daytime and the visibility is less than 200 meters, the dipped headlight is turned on;

3. driving a motor vehicle to enter a tunnel in the daytime and starting a headlamp 50 meters ahead;

4. when the motor vehicle is driven at night to pass through a sharp bend, a slope, an arch bridge and a pedestrian crossing, and at an intersection without traffic signal lamp control or overtaking, the high beam and the low beam are alternately used for indicating;

5. driving a motor vehicle at night, turning on a dipped headlight before starting, using the dipped headlight when the vehicle speed is less than 30 kilometers per hour, using a high beam when the vehicle speed is more than 30 kilometers per hour, using the dipped headlight on a road section with good illumination, and using the dipped headlight under weather conditions of rain, snow, fog, wind and the like;

6. when the motor vehicle is driven at night without a street lamp and the illumination is poor, the high beam is turned on, and when the distance between the rear vehicle and the front vehicle is close to the same direction, the high beam is prohibited to be turned on;

7. when the vehicle is driven on a narrow road at night, a narrow bridge meets vehicles or pedestrians and non-motor vehicles, the dipped headlight is used;

8. when the driver is driving at night and meets the opposite vehicle, the dipped headlight is used when the driver is 150 meters away from the opposite vehicle.

Based on the above 8 items, each item can be used as a first high beam and low beam.

Since the information obtained by the vehicle-mounted device is limited, some of the above 8 items may not be able to be determined, for example, if the vehicle does not have a camera, the vehicle-mounted device cannot determine whether the vehicle is on a narrow road, a narrow bridge, or the like, and at this time, item 7 cannot be implemented, and may not be used as the first high beam and low beam use condition.

Based on this, the first far and near light use condition may be set according to information acquired by the in-vehicle device, in addition to the local law, regulation, and the like. The first high-low beam usage conditions included in the first high-low beam usage condition set corresponding to different vehicle-mounted devices may also be different. For example, if there is a camera in a vehicle, the first high beam and low beam usage condition set may include item 7 above.

Optionally, in the embodiment of the application, the corresponding light switching information may be set for each first high beam and low beam use condition in advance for use when the light switching information is determined.

Specifically, when the vehicle-mounted device determines the light switching information according to a set first high-low beam use condition, determining a first high-low beam use condition currently met from the first high-low beam use condition set; and determining the light switching information corresponding to the first high and low beam use condition which is met currently according to the corresponding relation between the first high and low beam use condition and the light switching information.

The light switching information corresponding to the first high-beam and low-beam use condition can be determined according to the light switching mode required by the first high-beam and low-beam use condition.

For example, if the first high beam and low beam usage condition is that the motor vehicle is started at night, the corresponding light switching information is that the low beam is used;

for example, if the first high beam and low beam use condition is that the motor vehicle is driven at night and the road has no street lamp, the corresponding light switching information is that the high beam is used.

See table 1 for details:

TABLE 1

It should be noted that table 1 is only an example, and any condition that can determine the use of the headlamp can be used as the first high beam and low beam use condition in the embodiment of the present invention.

The vehicle-mounted device can determine which condition is met currently through the acquired various information.

Specifically, the vehicle-mounted device determines a first high beam and low beam usage condition currently met from the first high beam and low beam usage condition set according to condition information;

Since each vehicle can determine the first high beam and low beam use condition currently met according to the vehicle state information of other vehicles, the target vehicle can also broadcast the vehicle state information of the target vehicle in a wireless manner.

In implementation, the vehicle-mounted device may periodically transmit the vehicle state information of the target vehicle, such as once in 100 ms;

correspondingly, the vehicle-mounted equipment can determine light switching information every 100ms and control the headlamps of the target vehicle according to the light switching information.

The vehicle state information includes, but is not limited to, some or all of the following information:

the first environment information includes, but is not limited to, some or all of the following information:

weather information, external light information.

In the implementation, the vehicle position, the vehicle speed, the vehicle acceleration, and the vehicle traveling direction may be determined by means of a GNSS (Global Navigation Satellite System), a mobile wireless network, or the like. GNSS includes GPS (Global Positioning Systems), Positioning Systems such as beidou, galileo, sgallona, and the like.

The vehicle headlamp state may be determined by a vehicle lighting controller switch.

The weather information can be determined by a weather sensor, or the weather information of the current position of the vehicle can be acquired through a network.

Meteorological sensors include, but are not limited to, rain sensors, anemometers, fog detectors, visibility detectors, snow sensors, and the like.

Since the same weather information may correspond to different first high and low light use conditions during the day and at night, the weather information may further distinguish the weather information during the day from the weather information during the night.

The external light information may be determined by a light sensor.

As shown in fig. 2, in the schematic diagram of vehicle information transmission, the vehicle-mounted device broadcasts the vehicle state information of the vehicle where the vehicle is located, and as long as other vehicles within the broadcast range receive the information; and the vehicle-mounted equipment can also receive the vehicle state information of other vehicles, and the positions, the distances and the like of the vehicle and other vehicles can be determined according to the vehicle state information of the vehicle where the vehicle is located and the vehicle state information of other vehicles, so that the first far and near light use condition set can be compared, and which first far and near light use condition is met can be checked.

In practice, a priority may be set for each first high and low beam usage condition and the light switching information, so that if a plurality of first high and low beam usage conditions are found, a first high and low beam usage condition with the highest priority may be selected according to the set priority. And if the first high-low beam use conditions with the same priority exist, judging whether the light switching information corresponding to the first high-low beam use conditions conflicts, and if so, selecting the light switching information with the high priority.

And if the first high beam and low beam use conditions which are in line are not found, maintaining the current headlamp state.

In implementation, the vehicle-mounted device may determine an adjacent vehicle distance between the vehicle and the adjacent vehicle according to the vehicle state information sent by the other vehicle.

There are many ways to determine the distance between neighboring vehicles, and one way is given below:

when a plurality of vehicles possibly coming from the opposite direction are driven on the actual road, the vehicle-mounted equipment receives the adjacent vehicle state information in a period of 100ms and refreshes the headlamp state of the vehicle after the period is finished. In the period of 100ms, the vehicle-mounted device maintains two adjacent vehicle state linked lists, one is an opposite vehicle linked list and a same-direction vehicle linked list, the two linked lists can be understood as a form shown in fig. 3, each node in the linked lists represents vehicle state information of one vehicle, including position, speed, acceleration, driving direction, headlamp state information, distance from the vehicle, time delay calculation related data and the like, the linked lists are arranged from small to large in distance from the vehicle, the driving direction of the vehicle is taken as a positive direction when the distance is calculated, the system receives the adjacent vehicle state in 100ms, inserts the adjacent vehicle into the position corresponding to the linked list according to the adjacent vehicle distance calculated according to the received adjacent vehicle information, after the period of 100ms is finished, the linked lists are ordered according to the distance from the vehicle, so that the opposite vehicle and the same-direction vehicle which are closest to the vehicle can be quickly found, and obtains the nearest equidirectional vehicle distance and the nearest subtended vehicle distance. Meanwhile, the vehicle-mounted equipment broadcasts the state information of the vehicle to the surroundings in a 100ms bit period, and the specific working flow is shown in fig. 4.

As shown in fig. 4, a method for transmitting information by a vehicle according to an embodiment of the present invention includes:

step 400, loading pre-configuration parameters by the vehicle-mounted equipment;

the pre-configuration parameters include parameters of various functions performed by the vehicle-mounted device, such as first high beam and low beam usage conditions, light switching information priority, a calculation period (100 ms in the example), distance error calculation related parameters, timeout time for judging a single-vehicle mode and a roadside mode, and the like.

Step 401, the vehicle-mounted equipment circularly obtains vehicle state information and first environment information of the vehicle through various equipment;

step 402, the vehicle-mounted device broadcasts the vehicle state information and the first environment information in a wireless mode in a circulating mode, and receives the vehicle state information and the first environment information of other vehicles in a circulating mode.

Second, roadside mode.

The roadside mode requires the vehicle-mounted device and the roadside device to be used together, and the two devices are combined to be described below.

As shown in fig. 5, the method for controlling light in the roadside mode according to the embodiment of the present invention includes:

step 500, aiming at any vehicle in the coverage area of the road side equipment, the road side equipment determines light switching information corresponding to the vehicle according to a set second high and low beam use condition set;

step 501, the road side equipment notifies the vehicle of the light switching information in a wireless mode;

502, receiving light switching information from road side equipment by the vehicle-mounted equipment in a wireless mode;

step 503, the vehicle-mounted device controls a headlamp of a target vehicle according to the light switching information, wherein the target vehicle is a vehicle where the vehicle-mounted device is located.

In the embodiment of the present invention, a plurality of second high-low beam usage conditions are preset, a second high-low beam usage condition set is formed and configured in each roadside device, and in a subsequent usage process, the roadside device may further update, including deletion, replacement, addition, and the like, the second high-low beam usage conditions in the second high-low beam usage condition set in a wired or wireless manner.

The second high beam and low beam use conditions of the embodiment of the invention can be set according to laws and regulations of the location of the vehicle, use habits of users of the location of the vehicle and the like.

Based on the above 8 items, each item can be used as a second high beam and low beam.

Since the information obtained by the roadside device is limited, some of the above 8 items may not be judged, for example, if the roadside device does not have a weather sensor, the roadside device may not judge the surrounding weather information, and at this time, the condition of item 5 may not be known, and may not be used as the second high beam and low beam use condition.

Based on this, the second high beam and low beam use conditions may be set according to information acquired by the roadside apparatus, in addition to the local laws, regulations, and the like. The second high-low beam usage conditions included in the second high-low beam usage condition set corresponding to different roadside apparatuses may also be different. For example, if there is roadside equipment with a weather sensor, the second set of high and low beam usage conditions may include part of the above item 5.

Optionally, in the embodiment of the application, the corresponding light switching information may be set for each second high beam and low beam use condition in advance for use when the light switching information is determined.

Specifically, for any vehicle within the coverage range of the roadside device, the roadside device determines a second high beam and low beam usage condition currently met from the second high beam and low beam usage condition set;

and the vehicle-mounted equipment determines the light switching information corresponding to the second high-low beam service condition which is currently met according to the corresponding relation between the second high-low beam service condition and the light switching information.

The light switching information corresponding to the second high-beam and low-beam use condition can be determined according to the light switching mode required by the second high-beam and low-beam use condition.

For example, if the second high beam and low beam is used when the vehicle is started at night, the corresponding light switching information is the low beam;

for example, if the second high beam and low beam is used when the vehicle is driven at night and the road has no street lamp, the corresponding light switching information is used as the high beam.

See table 1 for details.

It should be noted that table 1 is only an example, and any condition that can determine the use of the headlamp can be used as the second high and low beam use condition in the embodiment of the present invention.

In an embodiment, the first far-near light use condition set and the second far-near light use condition set are independent from each other, and the conditions in the first far-near light use condition set and the second far-near light use condition set may be all different, partially the same, and all the same.

The roadside device may determine which condition each vehicle in the coverage currently meets through the acquired various information.

Specifically, for any vehicle within the coverage area of the roadside device, the roadside device determines a second high beam and low beam usage condition currently met from the second high beam and low beam usage condition set according to second environment information and the received vehicle state information of part or all of the vehicles within the coverage area.

Since the roadside device needs to determine the second high beam and low beam usage condition currently met by each vehicle according to the vehicle state information of each vehicle within the coverage area, the vehicle-mounted device of each vehicle within the coverage area needs to broadcast and transmit the vehicle state information of the roadside device in a wireless manner.

In implementation, the vehicle-mounted device may periodically transmit the vehicle state information of the target vehicle (i.e., the vehicle in which the vehicle-mounted device is located), for example, once in 100 ms;

correspondingly, the roadside device may determine the light switching information of each vehicle within the coverage area every 100ms, and notify each vehicle by broadcasting, multicasting, dedicated signaling, and the like.

If the road side equipment transmits the vehicle state information in the broadcasting, multicasting and other modes, each vehicle can carry one vehicle identifier when broadcasting the vehicle state information, and thus the road side equipment can also carry the vehicle identifier of the corresponding vehicle when transmitting the vehicle state information in the broadcasting, multicasting and other modes.

For example, if the vehicle state information a is sent to the vehicle 1, the vehicle state information a will carry the vehicle identifier of the vehicle 1 when being broadcast.

Wherein the vehicle state information includes some or all of the following information:

vehicle position, vehicle speed, vehicle acceleration, vehicle direction of travel, and vehicle headlamp state.

external light information, position information of the roadside device, and weather information. In implementation, the vehicle position, the vehicle speed, the vehicle acceleration, the vehicle driving direction may be determined by means of GPS, a mobile wireless network, or the like.

The weather information can further distinguish the day weather information from the night weather information because the same weather information in day and night may also correspond to different second far-near light use conditions.

The external light information may be determined by a light sensor.

The position of the general road side equipment is fixed, so that the position information of the road side equipment can be preset or obtained through a GPS.

As shown in fig. 6, in the schematic diagram of vehicle information transmission, the vehicle-mounted device broadcasts the vehicle status information of the vehicle where the vehicle is located, and as long as the road-side devices within the broadcast range receive the information

The roadside device can determine the position, the distance and the like of each vehicle and other vehicles according to the vehicle state information of the vehicles, so that the roadside device can be compared with the second high-low beam use condition set to check which second high-low beam use condition each vehicle accords with.

In practice, a priority may be set for each second high-low beam usage condition, so that if a plurality of second high-low beam usage conditions that are met are found for any one vehicle, one second high-low beam usage condition with the highest priority may also be selected according to the set priority.

And if the first high beam and low beam use conditions which are in line are not found, maintaining the current headlamp state of the vehicle.

In implementation, the roadside device may determine an adjacent vehicle distance between the located vehicle and the adjacent vehicle according to the vehicle state information sent by the vehicle.

the roadside device receives vehicle state information of surrounding vehicles within 100ms and maintains three vehicle state linked lists: one is the uplink vehicle state information linked list, one is the downlink vehicle state information linked list, and the last is the all-vehicle state information linked list, as shown in fig. 7. Each node in the linked list represents vehicle state information of a vehicle, including position, speed, acceleration, driving direction, headlamp state information, distance to roadside equipment, time delay distance calculation data and the like, if the uplink direction is defined as the positive direction, the three linked lists are sorted according to the distance from the nodes of the roadside equipment, the node with the largest distance is at the head of the linked list, the roadside equipment calculates the vehicle distance according to the received vehicle state information and inserts the vehicle distance into the correct position of the linked list, after the 100ms period is finished, the roadside equipment calculates the distance between the vehicle and an opposite vehicle according to the position of the vehicle in the linked list, the system traverses all vehicle state information linked lists, such as traverses to the first node vehicle G, the system judges that the driving direction is downlink, then finds the nearest same-direction vehicle B in the downlink linked list to obtain the same-direction adjacent vehicle distance, and then the system continues traversing all vehicle linked lists, and finding the nearest opposite adjacent vehicle A to obtain the nearest opposite adjacent vehicle distance, thus finishing the calculation of the adjacent vehicle distance of the vehicle G, and continuing to calculate the adjacent vehicle distance of the next node vehicle A after the system.

The road side equipment is only responsible for controlling the state information of the vehicle headlamps within a certain range, and if the received vehicle state information shows that the vehicle is out of the coverage range of the road side equipment, the vehicle state information is discarded. Regarding the determination of the coverage, the wireless communication system itself has a coverage circle a, the roadside device may receive the vehicle state information in this range, but for some vehicles around the vehicle a, which are located at the edge of the coverage, the roadside device may not sense the distance from the roadside device beyond the coverage circle a, the roadside device needs to determine a safe distance threshold, and the actual coverage of the roadside device is a circle B formed by a new radius obtained by subtracting the safe distance threshold from the radius of the circle a.

In the vehicle-mounted mode or the roadside mode, the relative distance of the vehicle needs to be determined under many conditions, and since the vehicles are in the process of high-speed movement when the relative distance of the vehicle is calculated, the distance moved by the vehicle due to time delay of data transmission and calculation needs to be considered when the relative distance is calculated. In the foregoing example of determining the adjacent vehicle distance, the system working process is to calculate the relative distance after receiving the vehicle information, insert the vehicle node into the linked list according to the relative distance, and then calculate the vehicle headlamp state after the fixed period ends, so that the system has two delay distances, the first is the distance of wireless transmission delay movement, and the second is the movement distance in the period from inserting the linked list to calculating the vehicle headlamp state, which is referred to as the operation delay distance for short.

In the following, a delay distance estimation method is described by taking a vehicle-mounted mode as an example, and this calculation method needs to save the position of the vehicle and the node insertion time when the node is inserted into the linked list. Based on the consideration of safety, the system needs to select different values when correcting the relative distance of the vehicles by using the two time delay distances, sometimes needs to use the maximum value of the time delay distance, sometimes needs to use the minimum value of the time delay distance, for example, the maximum value of the time delay distance needs to be used when judging whether the relative distance of the vehicles meeting is greater than a safety threshold value, and the minimum value of the time delay distance needs to be used when judging whether the vehicles meeting is finished. Both of the two maximum delay distances are stored in the node information of the linked list and used when the system calculates the distance of the headlamp.

The minimum of both delay distances is calculated as 0. The wireless transmission delay distance is related to the relative distance between two nodes, and the maximum value of the wireless transmission delay distance is calculated by multiplying the time required by the transmission limit distance of the wireless communication system by the set maximum vehicle speed (for example, the maximum communication distance between two nodes is 300m, and the wireless data transmission requires 10us for 300m, then the maximum value is multiplied by the set maximum vehicle speed according to 10 us).

The calculation delay distance comprises the moving distance of two nodes, the moving distance of the vehicle can be accurately calculated, and the moving distance of an adjacent vehicle needs to be estimated. The vehicle records the insertion time when finding an adjacent vehicle and inserting an adjacent vehicle node into a linked list, then subtracts the insertion time according to the current time to obtain a time difference when calculating the state of the vehicle headlamp, and then multiplies the set maximum vehicle speed by the time difference to obtain the maximum moving distance of the adjacent vehicle.

As shown in fig. 8, the first vehicle sends the vehicle state information of the first vehicle at the position a and the time a, the second vehicle receives the vehicle volume state information of the first vehicle at the position B and the time B, the first vehicle has already traveled to the position a B at the time B due to the wireless transmission delay, the second vehicle obtains the position of the first vehicle and calculates the relative distance of the vehicle at the time B, the relative distance is not a real relative distance, and the wireless transmission delay distance correction needs to be used, and the maximum value of the wireless transmission delay distance is the time program required by the wireless communication system transmission limit distance multiplied by the maximum vehicle speed set by the system. And the second vehicle starts to calculate the state of the headlamp after the fixed period is finished, the time C is reached, the first vehicle and the second vehicle run for a part of distance, the first vehicle is at the position A C, and the second vehicle is at the position B. The distance of travel, ya, can be accurately calculated because the system will save the location, ya, of the second car at time B, and the distance of travel, ya, can be obtained by taking the difference between the distance of travel, eb, and the distance of travel, ya. The travel distance A B needs to be estimated, and the maximum value of the travel distance A B is calculated by the method that the system stores the time of the time B, the time difference is obtained by the difference between the time C and the time B, and then the maximum value is obtained by multiplying the time difference by the maximum vehicle speed. The system subtracts the two delay distances from the relative distance to obtain a theoretical relative distance, and calculates the headlamp state by using the theoretical relative distance.

The wireless transmission delay distance is equal to the travel distance A;

calculating the time delay distance as the travel distance A B + the travel distance B A;

the relative distance is position a-position b;

the theoretical relative distance is relative distance, wireless transmission delay distance and calculation delay distance;

the above is exemplified by a vehicle-mounted device single-vehicle mode, and the calculation manner of the time delay distance of the roadside device is similar to that of the single-vehicle mode, which is not described herein again.

As shown in fig. 9, the method for controlling light by roadside mode vehicle-mounted equipment according to the embodiment of the present invention includes:

step 900, the vehicle-mounted equipment receives light switching information from the roadside equipment in a wireless mode, wherein the received light switching information is determined by the roadside equipment according to a set second high-low beam use condition set;

and step 901, the vehicle-mounted device controls a headlamp of a target vehicle according to the light switching information, wherein the target vehicle is a vehicle where the vehicle-mounted device is located.

weather information, external light information.

As shown in fig. 10, the method for assisting light control by roadside equipment in roadside mode according to the embodiment of the present invention includes:

step 1000, aiming at any vehicle in the coverage range of roadside equipment, the roadside equipment determines light switching information corresponding to the vehicle according to a set second high-low beam use condition set;

step 1010, the roadside device wirelessly notifies the vehicle of the light switching information, so that the vehicle controls headlamps according to the light switching information.

Based on the same inventive concept, the embodiment of the invention also provides vehicle-mounted equipment and roadside equipment, and as the principle of solving the problems of the equipment is similar to the method for controlling the light in the embodiment of the invention, the implementation of the equipment can refer to the implementation of the method, and repeated parts are not described again.

As shown in fig. 11, a first in-vehicle apparatus according to an embodiment of the present invention includes:

a first information determining module 1100, configured to determine light switching information according to a set first high-low beam usage condition set, or receive light switching information from a roadside device in a wireless manner, where the received light switching information is determined by the roadside device according to a set second high-low beam usage condition set;

the control module 1110 is configured to control a headlamp of a target vehicle according to the light switching information, where the target vehicle is a vehicle where the vehicle-mounted device is located.

Optionally, the first information determining module 1100 is specifically configured to:

Optionally, the first information determining module 1100 is further configured to:

weather information, external light information.

As shown in fig. 12, a roadside apparatus according to a first embodiment of the present invention includes:

a second information determining module 1200, configured to determine, for any one vehicle within a coverage area of the roadside device, light switching information corresponding to the vehicle according to a set second high-low beam usage condition set;

and a notification module 1210, configured to notify the vehicle of the light switching information in a wireless manner, so that the vehicle controls a headlamp according to the light switching information.

Optionally, the second information determining module 1200 is specifically configured to:

As shown in fig. 13, a second vehicle-mounted device of the embodiment of the invention includes:

a processor 1301, which is used to read the program in the memory 1304, executes the following processes:

determining light switching information according to a set first high-low beam use condition set, or receiving light switching information from road side equipment in a wireless mode, wherein the received light switching information is determined by the road side equipment according to a set second high-low beam use condition set; and controlling the headlamp of the target vehicle according to the light switching information, wherein the target vehicle is the vehicle where the vehicle-mounted equipment is located.

A transceiver 1302 for receiving and transmitting data under the control of the processor 1301.

Optionally, the processor 1301 is specifically configured to:

Optionally, the processor 1301 is further configured to:

weather information, external light information.

In fig. 13, a bus architecture (represented by bus 1300), bus 1300 may include any number of interconnected buses and bridges, bus 1300 linking together various circuits including one or more processors, represented by processor 1301, and memory, represented by memory 1304. The bus 1300 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 1303 provides an interface between the bus 1300 and the transceiver 1302. The transceiver 1302 may be one element or multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. Data processed by processor 1301 is transmitted over a wireless medium through antenna 1305, which antenna 1305 also receives and transmits data to processor 1301.

The processor 1301 is responsible for managing the bus 1300 and general processing, and may provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 1304 may be used to store data used by processor 1301 in performing operations.

Alternatively, the processor 1301 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).

As shown in fig. 14, a second roadside apparatus according to an embodiment of the present invention includes:

the processor 1401, which is used to read the program in the memory 1404, executes the following processes:

aiming at any vehicle in the coverage range of the road side equipment, determining light switching information corresponding to the vehicle according to a set second high and low beam use condition set; and informing the vehicle of the light switching information in a wireless mode so that the vehicle controls the headlamp according to the light switching information.

A transceiver 1402 for receiving and transmitting data under the control of the processor 1401.

Optionally, the processor 1401 is specifically configured to:

In fig. 14, a bus architecture (represented by the bus 1400), the bus 1400 may include any number of interconnected buses and bridges, and the bus 1400 links together various circuits including one or more processors, represented by the processor 1401, and memory, represented by the memory 1404. The bus 1400 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 1403 provides an interface between the bus 1400 and the transceiver 1402. The transceiver 1402 may be one element or multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. Data processed by processor 1401 is transmitted over a wireless medium via antenna 1405, and further, antenna 1405 receives data and transmits data to processor 1401.

The processor 1401 is responsible for managing the bus 1400 and general processing, and may provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 1404 may be used to store data used by processor 1401 in performing operations.

Alternatively, processor 1401 may be a CPU, ASIC, FPGA, or CPLD.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of performing light control, the method comprising:

and the vehicle-mounted equipment controls the headlamps of the target vehicle according to the lamplight switching information, the priority of the first high-low beam use condition and the priority of the second high-low beam use condition, wherein the target vehicle is the vehicle where the vehicle-mounted equipment is located.

2. The method of claim 1, wherein the vehicle-mounted device determines the light switching information according to the set first high and low beam use condition, and the method comprises the following steps:

3. The method of claim 2, wherein the vehicle-mounted device determining a first far-near light usage condition currently satisfied from the first set of far-near light usage conditions comprises:

4. The method according to claim 1 or 2, wherein before the vehicle-mounted device determines the light switching information according to the set first high and low beam use condition, the method further comprises:

5. The method of claim 3, wherein the vehicle state information includes some or all of the following information:

weather information, external light information.

6. A method of performing light control, the method comprising:

and the roadside equipment informs the vehicle of the light switching information in a wireless mode, so that the vehicle controls headlamps according to the light switching information, the priority of the first high-beam and low-beam use condition and the priority of the second high-beam and low-beam use condition.

7. The method of claim 6, wherein for any vehicle in the coverage area of the roadside device, the roadside device determining the light switching information corresponding to the vehicle according to the set second high-low beam use condition set comprises:

8. The method of claim 7, wherein the determining, by the roadside device, a second high-low light usage condition currently being met from the second set of high-low light usage conditions for any one vehicle within a coverage area of the roadside device comprises:

9. The method of claim 8, wherein the vehicle state information includes some or all of the following information:

10. An in-vehicle apparatus that performs light control, characterized by comprising:

and the control module is used for controlling the headlamps of the target vehicle according to the lamplight switching information, the priority of the first high-low beam use condition and the priority of the second high-low beam use condition, wherein the target vehicle is the vehicle where the vehicle-mounted equipment is located.

11. The vehicle-mounted device of claim 10, wherein the first information determination module is specifically configured to:

12. The vehicle-mounted device of claim 11, wherein the first information determination module is specifically configured to:

13. The in-vehicle apparatus according to claim 10 or 11, wherein the first information determination module is further configured to:

14. The vehicle-mounted apparatus according to claim 12, wherein the vehicle state information includes part or all of:

weather information, external light information.

15. A roadside apparatus that performs light control, characterized by comprising:

and the notification module is used for wirelessly notifying the vehicle of the light switching information so that the vehicle can control the headlamp according to the light switching information, the priority of the first high-beam and low-beam use condition and the priority of the second high-beam and low-beam use condition.

16. The roadside apparatus of claim 15, wherein the second information determination module is specifically to:

17. The roadside apparatus of claim 16, wherein the second information determination module is specifically to:

18. The roadside apparatus of claim 17, wherein the vehicle state information includes some or all of the following information: