CN103338220A - Infrared-wireless radio frequency combination communication method between two adjacent vehicles - Google Patents
Infrared-wireless radio frequency combination communication method between two adjacent vehicles Download PDFInfo
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- CN103338220A CN103338220A CN2013101866929A CN201310186692A CN103338220A CN 103338220 A CN103338220 A CN 103338220A CN 2013101866929 A CN2013101866929 A CN 2013101866929A CN 201310186692 A CN201310186692 A CN 201310186692A CN 103338220 A CN103338220 A CN 103338220A
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Abstract
The invention discloses an infrared-wireless radio frequency combination communication method between two adjacent vehicles. An infrared transmission module and an infrared reception module are arranged on a front side, a rear side, a left side and a right side of each vehicle; a central control unit and a wireless radio frequency module are arranged inside each vehicle; when the vehicle starts, the infrared transmission module continuously sends an ID number of the vehicle at a certain frequency; and when the infrared reception module receives a signal from the other vehicle, a relative position and the ID corresponding number of the other vehicle can be recognized. When the vehicle needs to carry out a large data volume information communication with the adjacent vehicle, the wireless radio frequency module is started, a destination address is set according to the ID number, and the communication with the adjacent vehicle is carried out in a wireless radio frequency manner. The method of the invention can discover and recognize the adjacent vehicle, and further selectively and purposefully carry out the large data volume information communication with the adjacent vehicle.
Description
Technical field
The invention belongs to the mobile communication technology scope, particularly the method for infrared between a kind of adjacent vehicle-less radio-frequency combined communication.
Background technology
The car networking owing to its intelligence, safety, environmental protection, economy, has wide application prospect as a branch of emerging technology of Internet of things.Its basic thought is with vehicle by network connection together, can monitor vehicle, the path instructs, and improves convenience and fail safe that vehicle travels.
At present, the car networking still is in planning and exploratory stage.In the car networking, the communication strategy of vehicle is an important aspect.For the vehicle in travelling, the object of paying close attention to is the vehicle of adjacent (hereinafter to be referred as " adjacent ") all around just often, and the information exchange of carrying out big data quantity with adjacent vehicle has very important meaning.
The wireless communication technology that existing coverage is wider is owing to can't realize direct and adjacent vehicle communication, the general mode that adopts broadcasting, make vehicle must receive the information of a large amount of non-adjacent vehicles, this has not only increased the burden of communication, and inconvenient user uses.Though and the less infrared communication of scope can be used to locate adjacent vehicle, because its reliability is relatively poor, speed is slower, do not use when not being adapted at the big data quantity information exchange.
Summary of the invention
Technical problem to be solved by this invention is that existing wireless communication strategy is difficult to judge that directly which is adjacent vehicle, and on purpose with wherein one or several cars carry out the big data quantity information exchange.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
The method of infrared between a kind of adjacent vehicle-less radio-frequency combined communication, it is characterized in that: at car an infrared transmission module and an infrared receiving module be set respectively all around, central control unit and wireless radio frequency modules are set in car, and its workflow is as follows:
Step 1), during vehicle launch, four infrared transmission modules of central control unit control send with certain frequency ID number that represents testing vehicle register;
Step 2), after the infrared receiving module of vehicle receives ID number that the infrared sending module of adjacent vehicle sends, if it is different with last ID number of receiving to receive this ID number or this ID number for the first time, to central control unit transmission interrupt requests;
Step 3), after central control unit receives interrupt requests, read in the infrared receiving module ID number according to priority, judge the orientation of vehicle of this ID number representative according to the orientation of the infrared receiving module that reads after, the control wireless radio frequency modules sends to adjacent vehicle with own ID number and azimuth information;
Step 4), adjacent vehicle receive ID number of vehicle with azimuth information after, use wireless radio frequency modules to send response message;
Step 5), vehicle receive the response message of adjacent vehicle.
As the further prioritization scheme of the present invention, in the time of need communicating with adjacent vehicle, central control unit control wireless radio frequency modules arranges destination address according to ID number of adjacent vehicle, communicates, and step is as follows:
Step 1), central control unit is set to the destination address that wireless radio frequency modules sends information with ID number of adjacent vehicle, sends the information of required communication;
Step 2), after adjacent vehicle receives information, with oneself ID number with information in destination address be complementary, if identical, then read information and send interrupt requests to central control unit, if different, then abandon information;
Step 3) after the central control unit of adjacent vehicle receives interrupt requests, reads information that wireless radio frequency modules receives and gives the driver with feedback information.
As the further prioritization scheme of the present invention, when some infrared receiving modules of vehicle break down, can remind the driver, step is as follows:
Step 1), vehicle infrared transmission module send with certain frequency ID number that represents testing vehicle register;
Step 2), adjacent vehicle receives this ID number, and feeds back to central control unit;
Step 3), the central control unit of adjacent vehicle control wireless radio frequency modules is set to the destination address that wireless radio frequency modules sends information with ID number of receiving, send own ID number with azimuth information to vehicle;
Step 4) after the wireless radio frequency modules of vehicle has received information, sends interrupt requests to central control unit;
Step 5), after central control unit receives interrupt requests, read ID number and azimuth information in the wireless radio frequency modules, judge whether from infrared receiving module, to receive the information of this ID, if no, then remind the infrared receiving module in this orientation of driver to need to check.
As the further prioritization scheme of the present invention, described priority is defined as follows:
Vehicle front is set to " 1 ", and rear view of vehicle is set to " 2 ", and the vehicle left is set to " 3 ", and vehicle is right-hand to be set to " 4 ", and the more little priority of absolute value of numeral is more big.
As the further prioritization scheme of the present invention, have uniqueness, can be set to the number-plate number for described ID number.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
Can identify adjacent vehicle, and then selection is arranged in adjacent vehicle, on purpose carry out big data quantity communication, not only can improve communication efficiency, be user-friendly to, and can alleviate the burden of communication network, lay a solid foundation for realizing more perfect car network savvy.
Description of drawings
Fig. 1 is the schematic diagram of inter-vehicular communication;
Fig. 2 is the module connection diagram;
Fig. 3 is the infrared transmission module principle schematic;
Fig. 4 is the infrared receiving module principle schematic;
Fig. 5 is infrared receiving circuit figure;
Fig. 6 is infrared transtation mission circuit figure.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described in further detail:
As shown in Figure 1, the invention discloses the method for infrared between a kind of adjacent vehicle-less radio-frequency combined communication, car an infrared transmission module and an infrared receiving module all around be set respectively, central control unit and wireless radio frequency modules are set in car, its workflow is as follows:
Step 1), during vehicle launch, four infrared transmission modules of central control module control send with certain frequency ID number that represents testing vehicle register;
Step 2), after the infrared receiving module of vehicle receives ID number that the infrared sending module of adjacent vehicle sends, if it is different with last ID number of receiving to receive this ID number or this ID number for the first time, to central control unit transmission interrupt requests;
Step 3), after central control unit receives interrupt requests, read in the infrared receiving module ID number according to priority, judge the orientation of vehicle of this ID number representative according to the orientation of the infrared receiving module that reads after, the control wireless radio frequency modules sends to adjacent vehicle with own ID number and azimuth information;
Step 4), adjacent vehicle receive ID number of vehicle with azimuth information after, use wireless radio frequency modules to send response message;
Step 5), vehicle receive the response message of adjacent vehicle.
Have uniqueness described ID number, preferably arrange by national correlation department is unified, also can be drawn up by relevant enterprise and submit national departments concerned after setting up standard, for the standardization in future lays the first stone.This number can be the coding of the license plate number of this vehicle, also can be the car networking identifier of unified definition.
Following examples have been described a kind of implementation method, adopt eight STM32F103 chips respectively as the controller of four infrared transmission modules and four infrared receiving modules, can increase transmitting power etc. by changing infrared transmitting tube, infrared receiving tube etc., and then the coverage of raising communication and reliability etc.
As shown in Figure 2, central control unit is powered by power supply, by IIC communication and 4 infrared receiving modules, 4 infrared sending modules are (because 4 infrared receiving modules all are the same, 4 infrared sending modules all are the same, so only drawn a receiver module and a sending module herein) communicate by letter.In addition, central control unit is also kept in touch with other modules.Because the ID that infrared sending module sends is that each vehicle is intrinsic, have cured in infrared transmission module for ID number that sends, so central control module only need be at vehicle startup or when out of service, control 4 infrared sending modules and start working and quit work and get final product.And infrared receiving module is after the ID that receives other vehicles number, if ID number of receiving for the first time this ID number or this ID number and last reception is different, send interrupt requests to central control unit, after central control unit receives interrupt requests, read ID number in the infrared receiving module, carry out corresponding operation then.And if ID number of receiving with previous moment for this ID number is identical, then infrared receiving module does not need to central control unit to send interrupt requests, has alleviated the workload of central control unit.When having a plurality of infrared receiving modules when sending interrupt requests to central control unit, central control unit reads information (left-3, right-hand-4, the more little priority of absolute value of numeral is more big for the place ahead-1, rear-2) according to the priority that arranges in advance.
Central control unit is judged the orientation of the vehicle of this ID number representative according to the orientation that receives ID number infrared receiving module, for example the infrared receiving module of the tailstock has received ID number and has been the information of " xxxxxx ", then can judge this ID number and be the vehicle of " xxxxxx " rear at car.
When needs and adjacent vehicle communicated, for example the known A car of B car was in the place ahead of oneself, and when the B car began to overtake other vehicles, the central control unit of B car was set to the destination address that wireless radio frequency modules sends information with ID number of A car, sends the information that namely will overtake other vehicles.After the A car receives information, with oneself ID number with information in destination address be complementary, find identical, read information and send interrupt requests to central control unit, after central control unit received interrupt requests, the feedback information of will overtaking other vehicles was given the driver, reminded the driver to take care.The B car does not have will the information of overtaking other vehicles to send to the vehicle on its right, and behavior can not cause security implication to the vehicle on its right because it is overtaken other vehicles.Whenever necessary, the B car can also send to the A car with the velocity information of vehicle, the behavioural information of vehicle (overtake other vehicles, need keep to the side to stop as needs etc.), basic security information (on fire as vehicle generation fuel tank, brake failure etc.) etc., in order to carry out better security strategy.
When some infrared receiving modules of vehicle break down, central control unit can be reminded the driver, the infrared receiving module in the B car the place ahead information that to receive that breaks down for example, when B car during near the A car, ID number of the infrared transmission module transmission of B car oneself to the A car, after the A car receives this ID number, central control unit control wireless radio frequency modules sends to the B car with own ID number with azimuth information, after the B car is received message, learn that the A car is in own the place ahead, the infrared receiving module of finding the place ahead does not simultaneously receive ID number of A car, fault may appear in the infrared receiving module of then judging its vehicle front, reminds the infrared receiving module in this orientation of driver to need to check.
As shown in Figure 3, STM32F103 is the controller of infrared sending module, and it is powered by power supply, controls infrared transtation mission circuit and sends specific I D number.
As shown in Figure 4, STM32F103 is the controller of infrared receiving module, it is powered by power supply, handles the information that infrared receiving circuit receives, and decodes ID number that contains in the information, if receive for the first time ID number that this ID number or this ID number and last time receive different, then send interrupt requests to central control unit, report this ID number, otherwise, then do not carry out interrupt requests, to alleviate the workload of central control unit.
As shown in Figure 5, HS0038 is infrared signal receiving tube (U9).Three port VCC, GND of infrared receiving tube (U9), OUT connect 3.3V power supply (3.3V) respectively, ground (GND), a general input/output port (GPIO_C1) of controller.An electric capacity in parallel (C32) between ground (GND) and 3.3V power supply (3.3V) plays the effect of filtering.General input/output port (GPIO_C1), resistance (R22), 3.3V power supply (3.3V) series connection, resistance (R22) is as pull-up resistor.After the infrared signal receiving tube received information, OUT sent data to controller by port.
As shown in Figure 6, SC9012(U12) be a Infrared Remote-Control Sending chip.Its function is, by with among port R1, R2, R3, the R4 one with port C1, C2, C3, C4, C5, C6, C7, C8 in one carry out the outside and be connected, the port OUT of SC9012 (U12) can export the high-low level of various combination, and then the different code signal (totally 32 kinds of different connected mode combinations, i.e. 32 kinds of different code signals) of control infrared transmitting tube (D19) emission.
5V power supply (5V), infrared transmitting tube (D19), triode (Q1), resistance (R20), (GND) series connection, by chip SC9012(U12) the opening, turn-off of port OUT control triode (Q1), and then control infrared transmitting tube (D19) whether transmit, reach the transmission ID function.Electric capacity (C27) is connected between 3.3V power supply (3.3V) and the ground (GND), is used for filtering.Electric capacity (C28) and electric capacity (C29) are connected the two ends of ground and crystal oscillator (Y1) respectively, are connected respectively to SC9012(U12 again) port x 2, X1, be SC9012(U12) the crystal oscillator signal is provided.3.3V power supply (3.3V), resistance (R21), LED lamp (D20), SC9012(U12) LED port polyphone, the function of flicker LED when being implemented in transfer of data shows that intuitively infrared transmitting tube (D19) is at the state of emission ID.SC9012(U12) port AIN connectivity port C8, this has determined the Custom Code of this Infrared Remote-Control Sending.SC9012(U12) port R1, R2, R3, R4 are connected respectively to chip ADG408(U10) port S1, S2, S3, S4.SC9012(U12) C1, C2, C3, C4, C5, C6, C7, C8 are connected respectively to chip ADG408(U11) port S1, S2, S3, S4, S5, S6, S7, S8.
ADG408(U10, U11) be a high performance analog multiplexer that Analog Devices produces.GPIO_A1, GPIO_A2, GPIO_A3, GPIO_A4, GPIO_A5, GPIO_A6 are 6 general input/output ports of STM32F103 chip.They connect ADG408(U10 respectively) port A0, A1, A2 and ADG408(U11) port A0, A1, A2.ADG408(U10) the direct ground connection of port VSS (GND), EN directly connects 3.3V power supply (3.3V), and VDD and GND connect 3.3V power supply (3.3V) and ground (GND) respectively, and the centre also connects an electric capacity (C30), is used for filtering.Other pins are unsettled.ADG408(U11) the direct ground connection of port VSS (GND), EN directly connects 3.3V power supply (3.3V), and VDD and GND connect 3.3V power supply (3.3V) and ground (GND) respectively, and the centre also connects an electric capacity (C30), is used for filtering.The function of ADG408 is the high-low level combination according to pin A0, A1, A2, and it is direct-connected which pin among the decision S0-S7 and D pin carry out inside.Can carry out the direct transmission of analog or digital signal on the bipod after the connection.
STM32F103 is by three general input/output port GPIO_A1 of control, the output of GPIO_A2, GPIO_A3, can control ADG408(U10) the level height of port A0, A1, A2, thereby control ADG408(U10) port S1, S2, S3, S4 whether with ADG408(U10) port D at ADG408(U10) the direct conducting of chip internal.STM32F103 is by other three general input/output port GPIO_A4 of control, the output of GPIO_A5, GPIO_A6, control ADG408(U11) the level height of port A0, A1, A2, thereby control ADG408(U11) port S1, S2, S3, S4, S5, S6, S7, S8 whether with ADG408(U11) port D at ADG408(U11) chip internal is connected.
In addition, ADG408(U10) port D with ADG408(U11) port D be connected together, so just can general input/output port GPIO_A1, GPIO_A2, GPIO_A3, GPIO_A4, GPIO_A5, GPIO_A6 control ADG408(U10 by six of STM32F103) port S1, S2, S3, S4 whether with ADG408(U11) port S1, S2, S3, S4, S5, S6, S7, S8 be connected.And ADG408(U10) port S1, S2, S3, S4 with SC9012(U12) port R1, R2, R3, R4 be connected respectively, port S1, S2 ADG408(U11), S3, S4, S5, S6, S7, S8 with SC9012(U12) C1, C2, C3, C4, C5, C6, C7, C8 be connected respectively.So, can general input/output port GPIO_A1, GPIO_A2, GPIO_A3, GPIO_A4, GPIO_A5, GPIO_A6 control SC9012(U12 by six of STM32F103) port R1, R2, one and SC9012(U12 among R3, the R4) C1, C2, C3, C4, C5, C6, C7, C8 in one interconnect.Utilize SC9012(U12) R1, R2, R3, R4 different with the connected mode of C1, C2, C3, C4, C5, C6, C7, C8, come control port OUT, and then the different code signal of control infrared transmitting tube (D19) output, to reach the purpose of transmission ID.
Claims (5)
1. the method for infrared-less radio-frequency combined communication between an adjacent vehicle, it is characterized in that: at car an infrared transmission module and an infrared receiving module be set respectively all around, central control unit and wireless radio frequency modules are set in car, and its workflow is as follows:
Step 1), during vehicle launch, four infrared transmission modules of central control unit control send with certain frequency ID number that represents testing vehicle register;
Step 2), after the infrared receiving module of vehicle receives ID number that the infrared sending module of adjacent vehicle sends, if it is different with last ID number of receiving to receive this ID number or this ID number for the first time, to central control unit transmission interrupt requests;
Step 3), after central control unit receives interrupt requests, read in the infrared receiving module ID number according to priority, judge the orientation of vehicle of this ID number representative according to the orientation of the infrared receiving module that reads after, the control wireless radio frequency modules sends to adjacent vehicle with own ID number and azimuth information;
Step 4), adjacent vehicle receive ID number of vehicle with azimuth information after, use wireless radio frequency modules to send response message;
Step 5), vehicle receive the response message of adjacent vehicle.
2. the method for infrared-less radio-frequency combined communication between a kind of adjacent vehicle according to claim 1, it is characterized in that: in the time of need communicating with adjacent vehicle, central control unit control wireless radio frequency modules arranges destination address according to ID number of adjacent vehicle, communicate, step is as follows:
Step 1), central control unit is set to the destination address that wireless radio frequency modules sends information with ID number of adjacent vehicle, sends the information of required communication;
Step 2), after adjacent vehicle receives information, with oneself ID number with information in destination address be complementary, if identical, then read information and send interrupt requests to central control unit, if different, then abandon information;
Step 3) after the central control unit of adjacent vehicle receives interrupt requests, reads information that wireless radio frequency modules receives and gives the driver with feedback information.
3. the method for infrared-less radio-frequency combined communication between a kind of adjacent vehicle according to claim 2 is characterized in that can reminding the driver when some infrared receiving modules of vehicle break down, and step is as follows:
Step 1), vehicle infrared transmission module send with certain frequency ID number that represents testing vehicle register;
Step 2), adjacent vehicle receives this ID number, and feeds back to central control unit;
Step 3), the central control unit of adjacent vehicle control wireless radio frequency modules is set to the destination address that wireless radio frequency modules sends information with ID number of receiving, send own ID number with azimuth information to vehicle;
Step 4) after the wireless radio frequency modules of vehicle has received information, sends interrupt requests to central control unit;
Step 5), after central control unit receives interrupt requests, read ID number and azimuth information in the wireless radio frequency modules, judge whether from infrared receiving module, to receive the information of this ID, if no, then remind the infrared receiving module in this orientation of driver to need to check.
4. according to the method for infrared-less radio-frequency combined communication between claim 1 or 2 or 3 described a kind of adjacent vehicles, it is characterized in that described priority is defined as follows:
Vehicle front is set to " 1 ", and rear view of vehicle is set to " 2 ", and the vehicle left is set to " 3 ", and vehicle is right-hand to be set to " 4 ", and the more little priority of absolute value of numeral is more big.
5. the method for infrared-less radio-frequency combined communication between a kind of adjacent vehicle according to claim 1 is characterized in that having uniqueness described ID number.
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Application publication date: 20131002 |