CN114189283A - Vehicle information interaction system, method for determining rear vehicle position and automobile - Google Patents
Vehicle information interaction system, method for determining rear vehicle position and automobile Download PDFInfo
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Abstract
The invention provides a vehicle information interaction system, a method and a device for determining the position of a rear vehicle and an automobile, and relates to the field of automobile control. The system comprises: visible light wireless communication device, visible light wireless communication device includes: a sending end and a receiving end; the visible light wireless communication equipment takes infrared light as a light source, is independently arranged at the head part and the tail part of the vehicle, and carries out data interaction with a vehicle control unit of the vehicle through a controller of the visible light wireless communication equipment; the vehicle tail is provided with a plurality of receiving ends which are dispersedly arranged in the horizontal direction. The invention takes infrared light as a light source, and does not use the car lamp of the car as the light source, thereby improving the efficiency and the accuracy of the information interaction between the visible light wireless communication equipment and accurately determining the position of the back car relative to the car. The vehicle information interaction system provided by the embodiment of the invention has extremely high practical value.
Description
Technical Field
The invention relates to the field of automobile control, in particular to a vehicle information interaction system, a method and a device for determining the position of a rear vehicle and an automobile.
Background
The LiFi (Light Fidelity, visible Light wireless communication) technology is a new wireless transmission technology for data transmission by using visible Light wave (such as Light emitted by a bulb), and is invented by the chairman of the electronic communication institute of the university of edinburgh, england, and professor HaraldHass of german physicist harald hass.
At present, with the development of an automatic driving technology, communication between vehicles is very important for driving safety of a driver, and although the existing millimeter wave radar, laser radar and vehicle-mounted camera can identify the distance between vehicles, detailed position information cannot be acquired from an opposite vehicle for own vehicles, and the identification precision is limited and the cost is high.
At present, the LiFi technology is applied to vehicles to perform information interaction with other vehicles, and the existing vehicle lamps are generally used as LiFi signal transceiver modules. However, the vehicle lamp also needs to have the lighting function during communication, and in this case, due to the influence of the irradiation range and the use environment of the lamp, the efficiency and the accuracy of the LiFi technology for realizing information interaction between vehicles are low, and if a plurality of vehicles exist behind the vehicle lamp, the relative position of the vehicle behind the vehicle can not be accurately judged through the LiFi technology.
Disclosure of Invention
The invention provides a vehicle information interaction system, a method and a device for determining the position of a rear vehicle and an automobile, and solves the problems.
In order to solve the above technical problem, a first aspect of an embodiment of the present invention provides a system for vehicle information interaction, including: a visible light wireless communication device, the visible light wireless communication device comprising: a sending end and a receiving end;
the visible light wireless communication equipment takes infrared light as a light source, is independently arranged at the head part and the tail part of the vehicle, and performs data interaction with a vehicle control unit of the vehicle through a controller of the visible light wireless communication equipment;
and a plurality of receiving ends are arranged at the tail part of the vehicle and are dispersedly arranged in the horizontal direction.
Optionally, the receiving end includes: a photosensor or a photosensitive sensor.
Optionally, the plurality of receiving ends arranged at the tail of the vehicle are arranged in sequence from the left side to the right side of the vehicle in the horizontal direction.
A second aspect of the embodiments of the present invention provides a method for determining a position of a rear vehicle, where the method is applied to any one of the above vehicle information interaction systems, and the method includes:
receiving vehicle signals sent by a rear vehicle through the plurality of receiving ends;
analyzing the vehicle signals to determine the number of signals;
and determining the position of the rear vehicle relative to the rear vehicle according to the number of the signals and the strength of the vehicle signals.
Optionally, determining the position of the rear vehicle relative to the rear vehicle according to the number of signals and the strength of the vehicle signal includes:
sequentially determining the strength and the number of the signals received by each receiving end according to the sequence from the left side to the right side of the vehicle;
determining that the rear vehicle is located on the left side of the rear vehicle when the intensity is gradually reduced and the number of the signals is one;
in a case where the intensity is gradually increased and the number of signals is one, it is determined that the rear vehicle is located on the right side of itself.
Optionally, after sequentially determining the strength of the vehicle signal received by each receiving end in an order from the left side to the right side of the vehicle, the method further includes:
comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually reduced and the number of the signals is multiple;
if the intensity of a first vehicle signal in the plurality of vehicle signals is greater than the intensity of a second vehicle signal, a first vehicle corresponding to the first vehicle signal is located on the left side of the first vehicle signal and is closer to the first vehicle signal, and a second vehicle corresponding to the second vehicle signal is located on the left side of the second vehicle signal and is farther from the second vehicle signal;
comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually increased and the number of the signals is multiple;
if the intensity of a first vehicle signal in the plurality of vehicle signals is greater than the intensity of a second vehicle signal, a first vehicle corresponding to the first vehicle signal is located on the right side of the first vehicle signal and is closer to the first vehicle signal, and a second vehicle corresponding to the second vehicle signal is located on the right side of the second vehicle signal and is farther from the second vehicle signal.
Optionally, the vehicle signal comprises: the method for analyzing the vehicle signals to determine the signal quantity comprises the following steps:
analyzing the vehicle signal to obtain the frame number;
determining the number of signals to be one under the condition that the frame numbers are the same;
and determining the number of the signals to be multiple under the condition that the frame numbers are different.
A third aspect of the embodiments of the present invention provides an apparatus for determining a position of a rear vehicle, where the apparatus is applied to any one of the above vehicle information interaction systems, and the apparatus includes:
the signal receiving module is used for receiving vehicle signals sent by a rear vehicle through the plurality of receiving ends;
the analysis signal module is used for analyzing the vehicle signals to determine the number of the signals;
and the position determining module is used for determining the position of the rear vehicle relative to the vehicle according to the number of the signals and the strength of the vehicle signals.
Optionally, the determining the location module comprises:
the signal strength and quantity determining unit is used for sequentially determining the strength and the quantity of the signals received by each receiving end according to the sequence from the left side to the right side of the vehicle;
the specific position determining unit is used for determining that the rear vehicle is positioned on the left side of the specific position determining unit under the condition that the intensity is gradually reduced and the number of the signals is one;
and the specific position determining unit is further used for determining that the rear vehicle is positioned on the right side of the vehicle under the condition that the intensity is gradually increased and the number of the signals is one.
The determine location module further comprises:
the comparison unit is used for comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually reduced and the number of the signals is multiple; comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually increased and the number of the signals is multiple;
the specific position determining unit is further configured to determine that, if the intensity of a first vehicle signal in the plurality of vehicle signals is greater than the intensity of a second vehicle signal, a first vehicle corresponding to the first vehicle signal is located on the left side of the first vehicle signal and is closer to the first vehicle signal, and a second vehicle corresponding to the second vehicle signal is located on the left side of the second vehicle signal and is farther from the second vehicle signal; if the intensity of a first vehicle signal in the plurality of vehicle signals is greater than the intensity of a second vehicle signal, a first vehicle corresponding to the first vehicle signal is located on the right side of the first vehicle signal and is closer to the first vehicle signal, and a second vehicle corresponding to the second vehicle signal is located on the right side of the second vehicle signal and is farther from the second vehicle signal.
Optionally, the vehicle signal comprises: the frame number of vehicle, analysis signal module includes:
the vehicle frame number analyzing unit is used for analyzing the vehicle signal to obtain the vehicle frame number;
a signal number determining unit for determining the number of signals to be one in the case that the number of the frames is the same; and determining the number of the signals to be multiple under the condition that the frame numbers are different.
A fourth aspect of an embodiment of the present invention provides an automobile, including: a system for vehicle information interaction as described in any one of the above first aspects;
the system performs the method of determining a position of a vehicle behind as described in any of the second aspects above.
The vehicle information interaction system provided by the invention takes infrared light as a light source, is independently arranged at the head part and the tail part of the vehicle, performs data interaction with a vehicle control unit of the vehicle through a controller of the vehicle, does not use a vehicle lamp of the vehicle as the light source any more, improves the efficiency and the accuracy of information interaction between vehicles of the LiFi device because the infrared light spectrum is single and invisible, is slightly influenced by the irradiation range and the use environment, and is beneficial to the use of the LiFi device in more scenes. Meanwhile, the lamp cover is independently arranged at the head and the tail of the vehicle, so that the influence of the lamp cover of the vehicle lamp on the reception and transmission of the LiFi signal is not considered, the reception and transmission efficiency of the LiFi signal can be improved, and the efficiency and the accuracy of information interaction between vehicles by the LiFi device are further improved.
In addition, a plurality of receiving terminals are dispersedly arranged at the tail of the vehicle in the horizontal direction, so that the number of the LiFi signal receiving terminals is increased, and the aim of accurately judging the relative position of the vehicle behind is achieved through the common effect of the plurality of receiving terminals.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention 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 that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of a vehicle information interaction system according to an embodiment of the invention;
FIG. 2 is a flow chart of a method of determining a position of a rearward vehicle in accordance with an embodiment of the present invention;
FIG. 3 is a schematic illustration of a position condition during operation of a vehicle according to an embodiment of the present invention;
fig. 4 is a block diagram of an apparatus for determining a position of a rear vehicle according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 inventor finds that the scheme of applying the LiFi technology to the vehicle for information interaction with other vehicles generally uses the original vehicle lamp as the LiFi signal transceiver module, which has the following problems:
1. under the general condition, when daytime natural light was sufficient, the user can not open the car light, just can't work so to the liFi equipment of car light as the light source, even the user has opened the car light, but because the influence of factors such as daytime natural light is stronger, the work efficiency of liFi equipment, the accuracy of receiving and dispatching information are all lower.
2. At night, natural light is weak, the vehicle lamp can be turned on, but if the vehicle lamp is turned on to be close to the light, the irradiation distance of the vehicle lamp is small, and the vehicle lamp can only irradiate within a range of about tens of meters, so that the working capacity of the LiFi equipment is obviously influenced; if the headlight is turned on, although the distance of the headlight is increased, the headlight is easy to dazzle the front vehicle, which is not favorable for the safe driving of the front vehicle.
In view of the above problems, the inventors have conducted extensive research, calculation, simulation and field test to inventively provide the vehicle information interaction system of the present invention, and the following describes and explains the technical solution of the present invention in detail.
Fig. 1 is a schematic diagram of a vehicle information interaction system according to an embodiment of the invention. The system comprises: visible light wireless communication device, LiFi device, the visible light wireless communication device includes: a transmitting end and a receiving end. Specifically, as shown in fig. 1, receiving terminals 1, 2, 3 are disposed at the rear of the vehicle, and transmitting terminals 5, 6, and a controller 4 of the LiFi device are disposed at the front of the vehicle. It should be noted that, in practice, the transmitting end and the receiving end of the LiFi device need to be arranged at both the vehicle head and the vehicle tail, but for simplicity of illustration, only the transmitting ends 5, 6 at the front of the vehicle, and the receiving ends 1, 2, 3 at the vehicle tail are exemplarily shown in fig. 1.
In the embodiment of the invention, the LiFi device takes infrared light as a light source, is independently arranged at the head part and the tail part of a vehicle, and performs data interaction with a Vehicle Control Unit (VCU) of the vehicle through a controller 4 of the LiFi device; one preferred mode is that the receiving end and the sending end of the LiFi equipment are arranged outside a lampshade of a vehicle, so that the influence of the vehicle lamp on receiving and sending of the LiFi equipment is avoided; of course, due to the characteristics of infrared light, the receiving end and the transmitting end of the LiFi device can be installed in the vehicle lamp cover.
In the embodiment of the present invention, a receiving end of a LiFi device includes: a photosensor or other light sensitive sensor or other device that can receive the LiFi signal is also possible. The receiving ends arranged at the tail part of the vehicle are sequentially arranged in the horizontal direction according to the sequence from the left side to the right side of the vehicle, and the arrangement is used for more accurately determining the position of the rear vehicle relative to the vehicle.
The vehicle information interaction system takes infrared light as a light source, does not use a vehicle lamp of a vehicle as the light source any more, has a single infrared light spectrum and is invisible, and is slightly influenced by an irradiation range and a use environment, so that the efficiency and the accuracy of information interaction between vehicles by the LiFi equipment are improved, and the system is favorable for the use of the LiFi equipment in more scenes. Meanwhile, the lamp cover is independently arranged at the head and the tail of the vehicle, so that the influence of the lamp cover of the vehicle lamp on the reception and transmission of the LiFi signal is not considered, the reception and transmission efficiency of the LiFi signal can be improved, and the efficiency and the accuracy of information interaction between vehicles by the LiFi device are further improved.
Based on the vehicle information interaction system, an embodiment of the present invention further provides a method for accurately determining a position of a rear vehicle, and referring to fig. 2, a flowchart of the method for determining a position of a rear vehicle according to an embodiment of the present invention is shown, and the method is applied to the vehicle information interaction system, and specifically includes the following steps:
step 201: and receiving vehicle signals sent by the rear vehicle through a plurality of receiving ends.
In the embodiment of the invention, the plurality of receiving terminals arranged at the tail part of the vehicle are sequentially arranged in the horizontal direction from the left side to the right side of the vehicle, so that after the rear vehicle sends the LiFi signals through respective LiFi devices, the receiving terminal at the tail part of the vehicle can receive the vehicle signals sent by the rear vehicle, namely, the plurality of receiving terminals receive the LiFi signals sent by the rear vehicle.
Of course, it can be understood that the host vehicle cannot receive the LiFi signal if the rear vehicle does not use the LiFi device for data transmission.
Step 202: the vehicle signal is interpreted to determine the signal quantity.
In the embodiment of the invention, after the receiving end receives the LiFi signals of the rear vehicles, the LiFi signals can be analyzed to determine the number of the signals, and the number of the signals can reflect the number of the rear vehicles. The method comprises the following specific steps:
step S1: and analyzing the vehicle signal to obtain the frame number.
In the embodiment of the invention, in order to distinguish the vehicles, each vehicle binds the unique number of the vehicle in the LiFi signal, and the unique number of the vehicle can be the frame number, namely, each LiFi signal sent out comprises the frame number of the vehicle. Of course, other identifiers may be used for binding as long as the condition that can distinguish the vehicles is satisfied.
After the receiving end of the vehicle receives a plurality of LiFi signals sent by vehicles behind, the frame number of the vehicle sending the LiFi signals can be obtained by analyzing each LiFi signal.
Step S2: in the case where the frame numbers are the same, the number of signals is determined to be one.
Step S3: and determining the number of the signals to be multiple under the condition that the frame numbers are different.
In the embodiment of the present invention, after the frame numbers included in each LiFi signal are obtained, if the frame numbers are the same, the number of the signals is determined to be one, and it should be noted that the number of the signals is one, which means that the LiFi signals are transmitted by the same vehicle, but does not mean that only one LiFi signal is transmitted by one vehicle. In actual use, as long as the LiFi device works normally, the LiFi device broadcasts the LiFi signals according to a set time period, so that the receiving end of the vehicle receives a plurality of LiFi signals, and after the frame numbers are obtained through analysis, the frame numbers are judged to be the same, the number of the vehicles behind can be determined to be one, and the number of the signals is also one.
Similarly, the receiving end of the vehicle receives a plurality of LiFi signals, and after the LiFi signals are analyzed to obtain the vehicle frame numbers, the vehicle frame numbers are judged to be different, if the vehicle frame numbers are different, the number of the vehicles behind is determined to be several, and the number of the signals is also several.
As an example: if there are 3 rear vehicles, the frame numbers are respectively: 555. 666, 777, the LiFi device of each vehicle broadcasts a LiFi signal via its respective transmitter, each LiFi signal including its respective frame number. The receiving end of the vehicle receives all LiFi signals, and the frame numbers 555, 666 and 777 can be obtained after analysis, so that the number of the rear vehicles is determined to be 3, and the number of the signals is also 3; similarly, if there are 1 rear vehicle, the frame number is: 555, the LiFi device of the vehicle broadcasts LiFi signals via the transmitter, each LiFi signal including its own frame number. The receiving end of the vehicle receives all LiFi signals, the frame number 555 can be obtained after analysis, although the received LiFi signals are multiple, the frame numbers are the same, the number of the vehicles behind is determined to be 1, and the number of the signals is also 1;
step 203: and determining the position of the rear vehicle relative to the rear vehicle according to the number of the signals and the strength of the vehicle signals.
In the embodiment of the invention, after the number of the signals is determined, namely the number of the vehicles behind is determined, the position of the vehicle behind relative to the vehicle behind can be determined according to the number of the signals and the strength of the vehicle signals. The method comprises the following specific steps:
step T1: and sequentially determining the strength and the number of the signals received by each receiving end according to the sequence from the left side to the right side of the vehicle.
In the embodiment of the present invention, the controller of the LiFI device, at the use place, needs to set an order for the receiving end of the tail of the vehicle, for example: setting a number 1, 2 and 3 … N for each receiving end according to the sequence from the left side to the right side of the vehicle; similarly, a number 1, 2, 3 … N may be set for each receiver in order from the right side to the left side of the vehicle; only the requirement of being able to distinguish each receiving end is satisfied.
After the receiving ends are set in sequence, the strength and the number of the signals received by each receiving end can be determined according to the set sequence.
Following the above example: if the vehicle tail has 3 receiving terminals arranged from the left side to the right side of the vehicle in sequence, the serial numbers are as follows: 1. 2 and 3, broadcasting LiFi signals by respective transmitting ends of rear vehicles, wherein each LiFi signal comprises a respective frame number. Then, according to the numbering sequence of the receiving terminals, the strength and the number of the LiFi signals received by the receiving terminal No. 1 are sequentially determined, the strength and the number of the LiFi signals received by the receiving terminal No. 2 are determined, and the strength and the number of the LiFi signals received by the receiving terminal No. 3 are determined.
Step V1: in the case where the intensity is gradually decreased and the number of signals is one, it is determined that the rear vehicle is located on the left side of itself.
Step V2: in the case where the intensity gradually increases and the number of signals is one, it is determined that the rear vehicle is located on the right side of itself.
In the embodiment of the invention, the strength and the number of the signals received by each receiving terminal are determined according to a set sequence, if the number of the LiFi signals is one, the number of the rear vehicles is one, and the strength of the LiFi signals is gradually reduced along with the sequence of the numbers of the receiving terminals, namely, the strength of the LiFi signals received by the No. 1 receiving terminal is the highest, the strength of the LiFi signals received by the No. 2 receiving terminal is higher, the strength of the LiFi signals received by the No. 3 receiving terminal is the lowest, and the rear vehicles broadcasting the LiFi signals are determined to be positioned on the left side of the vehicle because the receiving terminals are arranged in sequence from the left side to the right side of the vehicle.
Similarly, if the intensity of the LiFi signal is gradually increased along with the order of the numbers of the receiving terminals, that is, the intensity of the LiFi signal received by the receiving terminal No. 1 is the lowest, the intensity of the LiFi signal received by the receiving terminal No. 2 is higher, and the intensity of the LiFi signal received by the receiving terminal No. 3 is the highest, since the receiving terminals are arranged in the order from the left side to the right side of the vehicle, it is determined that the vehicle behind the LiFi signal is located on the right side of the vehicle.
In the embodiment of the present invention, the LiFi signal may further include: the host vehicle can calculate the detailed inter-vehicle distance of the rear vehicle from the host vehicle and perform warning based on the decrease tendency or increase of the recombination strength of the information. For example: when the distance between the rear vehicle and the vehicle is calculated to be smaller than the preset safe distance, alarm information is broadcasted to the rear vehicle through the LiFi device while the rear vehicle gives an alarm to remind a driver of the rear vehicle, the broadcasted alarm information can include the frame number of the rear vehicle, and therefore even if other vehicles receive the alarm information, the other vehicles cannot feed back the alarm information to the vehicles under the condition that the frame numbers are not matched, and the accuracy of the alarm information is guaranteed.
Step Q1: and comparing the intensity of the signals received by the same receiving end with the intensity of the signals received by the same receiving end under the condition that the intensity is gradually reduced and the number of the signals is multiple.
Step Q2: if the intensity of the first vehicle signal in the plurality of vehicle signals is greater than the intensity of the second vehicle signal, the first vehicle corresponding to the first vehicle signal is located on the left side of the first vehicle signal and is closer to the first vehicle signal, and the second vehicle corresponding to the second vehicle signal is located on the left side of the second vehicle signal and is farther from the second vehicle signal.
In the embodiment of the invention, similar to the case that the number of the signals is one, the principle is the same, the strength and the number of the signals received by each receiving end are determined according to the set sequence, and if the number of the LiFi signals is 2, the number of the rear vehicles is 2. The strength of the 2 LiFi signals is gradually reduced along with the sequence of the receiving end numbers, namely, the strength of the LiFi signal of the frame number 555 received by the receiving end number 1 is the highest, the strength of the LiFi signal of the frame number 555 received by the receiving end number 2 is higher, the strength of the LiFi signal of the frame number 555 received by the receiving end number 3 is the lowest, and a vehicle broadcasting the LiFi signal of the frame number 555 is determined to be positioned on the left side of the vehicle; similarly, the intensity of the LiFi signal of the frame number 666 received by the receiving terminal 1 is the highest, the intensity of the LiFi signal of the frame number 666 received by the receiving terminal 2 is higher, the intensity of the LiFi signal of the frame number 666 received by the receiving terminal 3 is the lowest, and it is determined that the vehicle behind the LiFi signal of the broadcasting frame number 666 is also located on the left side of the vehicle.
After determining that the vehicle behind the LiFi signal of the broadcasting frame number 555 and the vehicle behind the LiFi signal of the broadcasting frame number 666 are both located on the left side of the vehicle, comparing the intensity of the LiFi signal received by the same receiving end, namely comparing the intensity of the LiFi signal of the frame number 555 received by the receiving end No. 1 with the intensity of the LiFi signal of the frame number 666 received by the receiving end No. 1; if the intensity of the LiFi signal of the frame number 555 is greater than that of the LiFi signal of the frame number 666, it can be determined that the vehicle behind the LiFi signal broadcasting the frame number 555 is not only located on the left side of the vehicle and is closer to the vehicle, but the vehicle behind the LiFi signal broadcasting the frame number 666 is located on the left side of the vehicle but is further from the vehicle.
Similarly, as in the case of the above-mentioned one signal number, the host vehicle may also calculate the detailed vehicle distances between the two rear vehicles and the host vehicle, and issue an alarm when the early warning condition is met.
Step P1: comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually increased and the number of the signals is multiple;
step P2: if the intensity of the first vehicle signal in the plurality of vehicle signals is greater than the intensity of the second vehicle signal, the first vehicle corresponding to the first vehicle signal is located on the right side of the first vehicle signal and is closer to the first vehicle signal, and the second vehicle corresponding to the second vehicle signal is located on the right side of the second vehicle signal and is farther from the second vehicle signal.
In the embodiment of the present invention, based on the same principle as described above, when the intensity is gradually increased and the number of the LiFi signals is multiple, it is determined that the rear vehicles are all located on the right side of the host vehicle, and then, compared with the intensity of the plurality of LiFi signals received by the same receiving end, if the intensity of the LiFi signal of the rack number 555 is greater than the intensity of the LiFi signal of the rack number 666, it can be determined that the rear vehicle broadcasting the LiFi signal of the rack number 555 is not only located on the right side of the host vehicle but also is closer to the host vehicle, and the rear vehicle broadcasting the LiFi signal of the rack number 666 is located on the right side of the host vehicle, but is further away from the host vehicle.
Referring to fig. 3, which is a schematic diagram illustrating a position condition during a vehicle operation process according to an embodiment of the present invention, a method for determining a rear vehicle according to an embodiment of the present invention includes: the host vehicle 301 and the rear vehicles 302, 303 and 304 are numbered in the order from the left side to the right side of the vehicle in fig. 3, assuming that the frame number of the rear vehicle 302 is 666, the frame number of the rear vehicle 303 is 555, and the frame number of the rear vehicle 304 is 777, when the host vehicle 301 is disposed at the receiving end of the rear of the vehicle: 1. 2 and 3.
If the intensity of the LiFi signal of the frame number 666 received by the receiving end No. 1 of the vehicle 301 is the highest, the intensity of the LiFi signal of the frame number 666 received by the receiving end No. 2 is higher, and the intensity of the LiFi signal of the frame number 666 received by the receiving end No. 3 is the lowest, it is determined that the vehicle 302 behind the LiFi signal broadcasting the frame number 666 is located on the left side of the vehicle; meanwhile, the intensity of the LiFi signal of the frame number 777 received by the receiving end No. 1 is the lowest, the intensity of the LiFi signal of the frame number 777 received by the receiving end No. 2 is higher, and the intensity of the LiFi signal of the frame number 777 received by the receiving end No. 3 is the highest, so that it can be determined that the vehicle 304 behind the LiFi signal broadcasting the frame number 777 is located on the right side of the vehicle.
Meanwhile, the intensity of the LiFi signal of the frame number 555 received by the receiving terminal No. 1 is lower, the intensity of the LiFi signal of the frame number 555 received by the receiving terminal No. 2 is highest, the intensity of the LiFi signal of the frame number 555 received by the receiving terminal No. 3 is also lower and is close to or the same as the intensity received by the receiving terminal No. 1, and then it is determined that the vehicle 303 broadcasting the LiFi signal of the frame number 555 is positioned right behind the vehicle; if the intensity of the LiFi signal of the frame number 555 received by the receiving terminal No. 1 is lower, the intensity of the LiFi signal of the frame number 555 received by the receiving terminal No. 2 is highest, and the intensity of the LiFi signal of the frame number 555 received by the receiving terminal No. 3 is also lower but lower than the intensity received by the receiving terminal No. 1, it is determined that the rear vehicle 303 broadcasting the LiFi signal of the frame number 555 is located a little to the left of the front rear of the vehicle, and it can be understood that if the intensity of the LiFi signal of the frame number 555 received by the receiving terminal No. 3 is also lower but higher than the intensity received by the receiving terminal No. 1, it is determined that the rear vehicle 303 broadcasting the LiFi signal of the frame number 555 is located a little to the right of the front rear of the vehicle.
Through the embodiment, the method for determining the position of the rear vehicle in the embodiment of the invention is characterized in that a plurality of receiving terminals are dispersedly arranged on the tail part of the vehicle in the horizontal direction, the number of the vehicle frame is obtained through analysis by the LiFi signals received by the plurality of receiving terminals to determine the number of the rear vehicles, and then the position of the rear vehicle relative to the vehicle can be accurately determined by combining the intensity of the LiFi signals and the sequence of the receiving terminals, and alarm information can be sent to the vehicle and the rear vehicle when the early warning condition is met.
An embodiment of the present invention further provides an apparatus for determining a position of a rear vehicle, where the apparatus is applied to the above-mentioned system for vehicle information interaction, and referring to fig. 4, a block diagram of an apparatus for determining a position of a rear vehicle according to an embodiment of the present invention is shown, where the apparatus includes:
a signal receiving module 410, configured to receive vehicle signals sent by a rear vehicle through the plurality of receiving ends;
a signal analyzing module 420 for analyzing the vehicle signal to determine the signal number;
and a position determining module 430, configured to determine a position of the rear vehicle relative to the rear vehicle according to the number of signals and the strength of the vehicle signal.
Optionally, the determine position module 430 includes:
the signal strength and quantity determining unit is used for sequentially determining the strength and the quantity of the signals received by each receiving end according to the sequence from the left side to the right side of the vehicle;
the specific position determining unit is used for determining that the rear vehicle is positioned on the left side of the specific position determining unit under the condition that the intensity is gradually reduced and the number of the signals is one;
and the specific position determining unit is further used for determining that the rear vehicle is positioned on the right side of the vehicle under the condition that the intensity is gradually increased and the number of the signals is one.
The determine location module 430 further comprises:
the comparison unit is used for comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually reduced and the number of the signals is multiple; comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually increased and the number of the signals is multiple;
the specific position determining unit is further configured to determine that, if the intensity of a first vehicle signal in the plurality of vehicle signals is greater than the intensity of a second vehicle signal, a first vehicle corresponding to the first vehicle signal is located on the left side of the first vehicle signal and is closer to the first vehicle signal, and a second vehicle corresponding to the second vehicle signal is located on the left side of the second vehicle signal and is farther from the second vehicle signal; if the intensity of a first vehicle signal in the plurality of vehicle signals is greater than the intensity of a second vehicle signal, a first vehicle corresponding to the first vehicle signal is located on the right side of the first vehicle signal and is closer to the first vehicle signal, and a second vehicle corresponding to the second vehicle signal is located on the right side of the second vehicle signal and is farther from the second vehicle signal.
Optionally, the vehicle signal comprises: the frame number of the vehicle, the analytic signal module 420 includes:
the vehicle frame number analyzing unit is used for analyzing the vehicle signal to obtain the vehicle frame number;
a signal number determining unit for determining the number of signals to be one in the case that the number of the frames is the same; and determining the number of the signals to be multiple under the condition that the frame numbers are different.
An embodiment of the present invention further provides an automobile, including: a system for vehicle information interaction as described in any of the above;
the vehicle information interaction system executes the method for determining the position of the rear vehicle in any one of the steps 201 to 203.
Through the embodiment, the vehicle information interaction system provided by the embodiment of the invention takes infrared light as a light source, is independently arranged at the head part and the tail part of the vehicle, performs data interaction with a vehicle controller of the vehicle through a controller of the vehicle, does not use a vehicle lamp of the vehicle as the light source any more, improves the efficiency and the accuracy of information interaction between vehicles of the LiFi device due to the fact that the infrared light spectrum is single and invisible, and is slightly influenced by an irradiation range and a use environment, and is beneficial to being used in more scenes of the LiFi device. Meanwhile, the lamp cover is independently arranged at the head and the tail of the vehicle, so that the influence of the lamp cover of the vehicle lamp on the reception and transmission of the LiFi signal is not considered, the reception and transmission efficiency of the LiFi signal can be improved, and the efficiency and the accuracy of information interaction between vehicles by the LiFi device are further improved.
Meanwhile, a plurality of receiving ends are dispersedly arranged in the horizontal direction on the basis of the tail of the vehicle, the frame number is obtained through analysis of LiFi signals received by the plurality of receiving ends so as to determine the number of the rear vehicles, the positions of the rear vehicles relative to the vehicle are accurately determined by combining the strength of the LiFi signals and the sequence of the receiving ends, and alarm information can be sent to the vehicle and the rear vehicles when early warning conditions are met. The vehicle information interaction system provided by the embodiment of the invention has extremely high practical value.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A system for vehicle information interaction, the system comprising: a visible light wireless communication device, the visible light wireless communication device comprising: a sending end and a receiving end;
the visible light wireless communication equipment takes infrared light as a light source, is independently arranged at the head part and the tail part of the vehicle, and performs data interaction with a vehicle control unit of the vehicle through a controller of the visible light wireless communication equipment;
and a plurality of receiving ends are arranged at the tail part of the vehicle and are dispersedly arranged in the horizontal direction.
2. The system of claim 1, wherein the receiving end comprises: a photosensor or a photosensitive sensor.
3. The system of claim 1, wherein the plurality of receiving ends arranged at the rear of the vehicle are arranged in order from the left side to the right side of the vehicle in the horizontal direction.
4. A method for determining a position of a vehicle behind, the method being applied to the vehicle information interaction system according to any one of claims 1 to 3, the method comprising:
receiving vehicle signals sent by a rear vehicle through the plurality of receiving ends;
analyzing the vehicle signals to determine the number of signals;
and determining the position of the rear vehicle relative to the rear vehicle according to the number of the signals and the strength of the vehicle signals.
5. The method of claim 4, wherein determining the position of the rear vehicle relative to itself based on the number of signals and the strength of the vehicle signals comprises:
sequentially determining the strength and the number of the signals received by each receiving end according to the sequence from the left side to the right side of the vehicle;
determining that the rear vehicle is located on the left side of the rear vehicle when the intensity is gradually reduced and the number of the signals is one;
in a case where the intensity is gradually increased and the number of signals is one, it is determined that the rear vehicle is located on the right side of itself.
6. The method of claim 5, wherein after sequentially determining the strength of the vehicle signal received by each receiving end in order from the left side to the right side of the vehicle, the method further comprises:
comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually reduced and the number of the signals is multiple;
if the intensity of a first vehicle signal in the plurality of vehicle signals is greater than the intensity of a second vehicle signal, a first vehicle corresponding to the first vehicle signal is located on the left side of the first vehicle signal and is closer to the first vehicle signal, and a second vehicle corresponding to the second vehicle signal is located on the left side of the second vehicle signal and is farther from the second vehicle signal;
comparing the intensity of a plurality of vehicle signals received by the same receiving end under the condition that the intensity is gradually increased and the number of the signals is multiple;
if the intensity of a first vehicle signal in the plurality of vehicle signals is greater than the intensity of a second vehicle signal, a first vehicle corresponding to the first vehicle signal is located on the right side of the first vehicle signal and is closer to the first vehicle signal, and a second vehicle corresponding to the second vehicle signal is located on the right side of the second vehicle signal and is farther from the second vehicle signal.
7. The method of claim 4, wherein the vehicle signal comprises: the method for analyzing the vehicle signals to determine the signal quantity comprises the following steps:
analyzing the vehicle signal to obtain the frame number;
determining the number of signals to be one under the condition that the frame numbers are the same;
and determining the number of the signals to be multiple under the condition that the frame numbers are different.
8. An apparatus for determining a position of a vehicle behind, the apparatus being applied to the vehicle information interaction system according to any one of claims 1 to 3, the apparatus comprising:
the signal receiving module is used for receiving vehicle signals sent by a rear vehicle through the plurality of receiving ends;
the analysis signal module is used for analyzing the vehicle signals to determine the number of the signals;
and the position determining module is used for determining the position of the rear vehicle relative to the vehicle according to the number of the signals and the strength of the vehicle signals.
9. The apparatus of claim 8, wherein the determine location module comprises:
the signal strength and quantity determining unit is used for sequentially determining the strength and the quantity of the signals received by each receiving end according to the sequence from the left side to the right side of the vehicle;
the specific position determining unit is used for determining that the rear vehicle is positioned on the left side of the specific position determining unit under the condition that the intensity is gradually reduced and the number of the signals is one;
and the specific position determining unit is further used for determining that the rear vehicle is positioned on the right side of the vehicle under the condition that the intensity is gradually increased and the number of the signals is one.
10. An automobile, characterized in that the automobile comprises: a system for vehicle information interaction according to any one of claims 1-3;
the system performs the method of determining a position of a vehicle behind according to any of claims 4-7.
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