CN108189750A - Wireless two-way cars meeting at night distance light light intelligent control system - Google Patents

Abstract

The invention discloses a kind of wireless two-way cars meeting at night distance light light intelligent control systems, are related to photosensitive detection technique, wireless two-way control technology, microprocessor controller technology.System design includes hardware and software part：Wireless two-way cars meeting at night distance light light intelligent control system.Digital light intensity Acquisition Circuit, which realizes, is detected night dazzle light signal.Wireless two-way transmission circuit realizes the two-way communication between night automobile.Microprocessor controller program, luminous intensity detection subprogram, wireless two-way transmitting-receiving subprogram, monitoring subroutine.It is divided into monitoring main program and command process subprogram by module.Example illustrates the control principle of high beam during cars meeting at night.

Description

Wireless two-way cars meeting at night distance light light intelligent control system

Technical field

The present invention relates to photosensitive long-distance intelligent control technical fields, and skill is controlled more particularly to a kind of high beam wireless two-way Art.Belong to that automobile manufacture industry is automatically controlled and lamp light wireless control technology field.

Background technology

At present, well known headlight for vehicles does not have night brake conversion system；During cars meeting at night, self driving opens headlight Estimate other side Lai Che and open headlight, it is each it is personal be manually switched to dipped headlight state or front vehicle driver's active in meeting Chinese herbaceous peony with manually by high beam be converted into dipped headlight complete two vehicles intersect.General driver easily forgets self driving when meeting at night High beam is opened.Indivedual drivers have the bad habit that long-term Kaiyuan City's light driving carries out.

According to《People's Republic of China's law on road traffic safety implementing regulations》48th article at no center, isolation is set Apply or without on the road of center line, motor vehicle meet contra always vehicle when should abide by following regulation：（Five）It meets at night Always dipped headlight should used instead other than 150 meters of vehicle away from contra, narrow road, narrow bridge or when entering the street of heavy traffic with it is non- Dipped headlight should be used during vehicles meeting；Motor vehicle does not have street lamp, underlit or meet mist, rain, snow, sand at night In the case of the low visibilities such as dirt, hail when driving, the rear car of equidirectional traveling and front truck closely when driving, must not use distance light Lamp.

Because the light beam of high beam is extremely concentrated and brightness is higher, driver direct-view traveling automobile when, often by Glare influences, and forms local blind area even temporary blindness, the perception of speed and distance is declined, driver hands at night Forget either to have the bad habit of long-term Kaiyuan City's light or vindictive switch-on distance light during mutual meeting and easily cause traffic accident；And because Positive difficulty is enforced the law and is taken in traffic accident caused by high beam reason.

In order to overcome the above problem, the present invention《Wireless two-way cars meeting at night distance light light intelligent control system》Success solves Determined dazzle light meeting when transfer problem, make driving at night and walking no longer bogged down in crisis.So as to reduce and avoid because Various hidden trouble of traffic caused by night does not open distance light reason by regulation.

Invention content

In view of this, the present invention provides a kind of wireless two-way cars meeting at night distance light light intelligent control systems.

To achieve the above object, the present invention provides following technical solution.

Circuit hardware part is the basis that whole system performs, it is mainly the platform that software provides program operation.It is and soft Part part is the signal embodied to hardware port, is acquired, analyzed, handled, and final realization controller to be realized each Item function.

Wireless two-way cars meeting at night distance light light intelligent control system, including 3. distance light light intelligent control system, 2. remote Light lamp digital light intensity Acquisition Circuit, 1. wireless two-way transmission circuit, 5. distance light lamp control circuit, 4. electric supply system（Surely Volt circuit）.3. microprocessor is read by I2C bus communications interface, 2. collected data are emitted by wireless two-way with connecing Receipts system realizes high accuracy number light intensity sensor data after the analysis of microprocessor device by the control program write Commander and control to system.So as to fulfill the high beam on wireless two-way control automobile.

Compared with prior art, the present invention haing the following advantages and effect.

System design includes hardware and software part.Hardware is the basis that whole system performs, it is mainly that software provides The platform of program operation.And software section, it is the signal embodied to hardware port, is acquired, analyzed, handled, it is final real The existing various functions to be realized of controller.

It is realized by digital light intensity sensor and night dazzle light signal is detected.Digital light intensity senses Device circuit is a kind of integrated circuit of twin wire serial bus interface, close to the light of people's visual sensitivity.From improving distance light Lamp inspection survey is guiding and reliability.

Wireless two-way transmission circuit realizes the two-way communication of high beam during to cars meeting at night.It is that one kind works in 433MHZ exempts from the ISM band that licensing uses, and has receiving sensitivity high, strong interference immunity, communication is stablized.Main radio frequency leads to Parameter is interrogated by may be programmed, by programing work in 3 ISM bands of 433/868/915MHz, uses SPI interface and microprocessor Controller is into communicating, and configuration is very convenient, wherein being dynamically arranged.It is achieved thereby that high beam during to cars meeting at night Double-direction control.

Bidirectional transmit-receive system of the present invention uses the two-way chip of low-consumption wireless, receives electric current all in 2.6mA or so, reduces Power attenuation in circuit realizes energy saving purpose.

High beam is all that high beam is converted into dipped beam by driver using manual mode during existing cars meeting at night Lamp；Distance light light intelligent control system is not provided on automobile.The invention provides a kind of wireless two-way high beam and intelligently controls System processed, the intelligence control system can not only detect whether automobile opens high beam, and can also facilitate and be interacted in two vehicles High beam is switched to dipped headlight state automatically during meeting, light status before driving is automatically restored to after the completion of meeting.

Description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, according to this A little attached drawings obtain other attached drawings.It shall fall within the protection scope of the present invention.

Fig. 1 is the present invention provides wireless two-way cars meeting at night distance light light intelligent control system block diagrams.

Fig. 2 is the present invention provides wireless two-way cars meeting at night distance light light intelligent control system schematic diagrams.

Fig. 3 is the present invention provides wireless two-way transmission circuit schematic diagrams.

Fig. 4 is the present invention provides dazzle light digital light intensity Acquisition Circuit schematic diagrams.

Fig. 5 is the present invention provides dazzle light control circuit schematic diagrams.

Fig. 6 is the present invention provides upper beam digital light intensity collector internal structure charts.

Fig. 7 is the present invention provides digital light intensity sensor emission flow charts.

Fig. 8, which is that the present invention provides digital light intensity sensors, to receive flow chart.

Specific embodiment

The invention discloses a kind of wireless two-way cars meeting at night distance light light intelligent control system, to reach quick distance light The purpose of lamp conversion.Avoid when meeting at night various hidden trouble of traffic caused by high beam.

Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work Embodiment shall fall within the protection scope of the present invention.

Such as Fig. 1, block diagram of the present invention includes Fig. 2 wireless two-way cars meeting at night distance light light intelligent control systems；Fig. 4 vapour Vehicle high beam digital light intensity Acquisition Circuit, Fig. 3 wireless two-way transmission circuits, the control of Fig. 5 dazzle lights.

If Fig. 4 dazzle light nights are projected on U2 digital light intensity collection sensors, analog signals are converted into 16 Position digital signal carries out the U1 microprocessor controllers controller inspection that communicates by I2C bus interface with U1 microprocessor control systems Calling wireless two-way transmitting-receiving subprogram is commanded and controlled through internal main program after measuring the signal；Fig. 3 wireless two-ways is notified to receive and dispatch Circuit transmission receives data；The micro- place's controller of receiving terminal is by the transmitting in Fig. 3 or the data of reception through internal main program Commander and control Fig. 2 microprocessor controller I/O end P2.3 be placed in low potential, Q1 works in Fig. 5 distance light control circuits, drive after Electric apparatus coil JK1, high beam normally-closed contact K1 are opened;Dipped headlight normally opened contact K2 is closed, it is achieved thereby that wireless two-way controls Long-and-short distant light conversion on automobile.

U1 uses 8 high-performance CMOS microprocessor chips of American ATMEL, composition microprocessor control system in Fig. 2 System；Microprocessor chip it is powerful, have following standard feature：8k bytes Flash, 512 byte RAM, 32 I/O mouthfuls Line, WatchDog Timer, built-in 4KB EEPROM, MAX810 reset circuits, 3 16 bit timing devices/counters, in 4 outsides It is disconnected, one 7 vectorial 4 grades of interrupt structures（5 vectorial 2 grades of interrupt structures of compatible tradition 51）, full duplex serial port.In addition microprocessor Device can be down to the operation of 0Hz static logics, support 2 kinds of softwares that energy-saving mode may be selected.Under idle mode, CPU is stopped, and allows RAM, timer/counter, serial ports, interruption work on.Under power down protection mode, RAM contents are saved, and oscillator is frozen Knot, all work of microprocessor stop, until next interruption or hardware reset.Highest operation frequency 35MHz, 6T/12T It is optional.

The detection of U2 high beams is using 16 high accuracy number output type light intensity sensor integrated circuits in Fig. 4.Light is believed It number is converted to electric signal and 16 digit digital datas is obtained by analog-digital converter, the communication between sensor and microprocessor controller uses The I2C communications protocol of standard.U1 microprocessor controller I/0 ends port P1.0, P1.1 connection microprocessors control in Fig. 4 and Fig. 2 Device by instructing operation to read out the photometric data of storage inside accordingly.

The transmitting-receiving of U4 wireless two-ways realizes wireless data transceiving using the chip of Nordic companies in Fig. 3, passes through between the two SPI communication agreement carries out data exchange.According to different application demands, microstrip antenna or the disposition formula day of high-gain may be selected Line.With microprocessor controller I/O port P3.0, P3.1 connections.Because U2 chip operating voltages are 1.9~3.6 V in Fig. 4, so It devises a voltage DC5V and is converted into U3 in DV3.3V circuits such as Fig. 4.

U2 wireless two-ways transmission circuit using super low-power consumption single-chip wireless chip, frequency range from 300MHz to 510MHz.With low-down reception power consumption, reception electric current is 2.6mA, much smaller than the reception electric current of similar transceiver.Work Voltage is 2.1-3.6V, and maximum transmission power+12.5dBm, U2 integrated level is very high, and it comprises radio-frequency enableds and logic control The integrated circuit of function processed is internally integrated voltage controlled oscillator, phase-locked loop circuit, power amplification circuit, low noise amplifier circuit, tune Demodulator circuit processed, frequency converter, intermediate level circuit etc..In addition it incorporates the message transmission rate of baseband modem and is up to 150Kbps data processing functions include the FIFO of 64 bytes, packet processing, automatic CRC generations and Data Whitening.Its height Integrated framework allows minimum outer member quantity, while keeps the flexibility of design.All main radio-frequency communication parameters Programmable, wherein majority is dynamically arranged.

Since U2 peripheral components are seldom in Highgrade integration Fig. 3, so the key of design is the matching electricity of RF front ends The design on road.The impedance of general RF chip emissions and receiving port is not 50 Ω impedances of standard, to reach best and connect Input impedance must be allowed to antenna match with 50 Ω by fruit of producing effects by the compensation of peripheral components, and circuit is as shown in Figure 3.In figure Y2 is SAW filter, and for the signal other than allocated frequency band of decaying, L2, C3, C22 is impedance matching network, and L4, L5 are pressed Inductance of oscillator is controlled, adjusts voltage controlled oscillation inductance, module can be made to work in different frequencies, C7, R3, C8 is phaselocked loop electricity Road.

This system design work frequency is 433MHZ.It works in 433MHZ openings ISM band and exempts from licensing use, have and connect Receive high sensitivity, the characteristics of strong interference immunity, communication is stablized, operating voltage is 1.9~3.6V, and state is only under standby mode 2.5uA；, using SPI interface and microprocessor communication, it can match by programing work in 3 ISM bands of 433/868/915MHz Putting very convenient and need to only occupying 2 I/O ports of U1 microprocessors in Fig. 2 and 2 private ports can work normally such as. That define here is P3.0 (RXD) and P3.1 (TXD).

Wireless two-way coding such as following table.

Lead code is " 1010 " alternate code, and effect is to make purpose receiver clock synchronous with transmitter, under normal mode Preamble length is generally 32bit.

4 kinds of operating modes, are converted by SET_A and SET_B pins, and 4 kinds of patterns can be converted mutually.General modfel（Pattern 0）As SET_A=0, during SET_B=0, module is operated in pattern 0.

Transmitting：Module receives the user data from serial ports, and module transmitting wireless data packet length is a fixed word Joint number, when user input data amount reaches this fixed word joint number, module will start wireless transmission, and user can continue at this time Input needs the data emitted.When user needs the byte transmitted to be less than this fixed word joint number, when module waits for 3 byte Between, if useless user data continues to input, then it is assumed that data terminate, and all data packets are passed through and wirelessly sent out by module at this time.Pass through The data packet that pattern 0 is sent out can only be in pattern 0, the receiving module of pattern 1 receives.

It receives：The always on wireless receiving function of module can receive the data packet sent out from pattern 0, pattern 1. Data delay time from pattern 0 is of short duration, the about 5s of the packet delay from pattern 1.Module is usually in reception shape State once receiving data, is just exported the data received by UART, at this moment receiver function is interrupted with microprocessor, number Stored according to reading, give module by UART the data to be sent out when transmission data, can just send automatically, be sent from It is dynamic to be switched to reception pattern.Communication distance receives electric current all in 2.6mA or so at 500 meters or so.

The communications protocol and process of module 2..

Emit flow such as Fig. 7.

Emission process：

1) high level is set as in standby mode, TX_EN and PWR_UP, TRX_CE is set as low level.When microprocessor has When data need to be sent to defining node, the address (TX_address) of receiving node and valid data (TX_payload) pass through SPI interface is sent to, microprocessor setting interface rate.

2) microprocessor setting TRX_CE starts transmission for high level.

3) inter-process:Wireless system powers on automatically, data packet completes (adding lead code and cyclic redundancy check), data packet hair It send (50k, GFSK, Manchester's code).

If 4), AUTO_RETURN is arranged to high level, generates lead code and DR is set to low, will continuously send number According to packet, until TRX_CE is set low to.

5) when TRX_CE is set low to, terminate data transmission and oneself is arranged to standby mode.

Receive flow such as Fig. 8.

Receive process：

1) by setting TRX_CE high, TX_EN is low to select RX patterns.

2) after 650 μ s, aerial information is monitored.

3) when finding the carrier wave identical with receives frequency, carrier wave detection (CD) is set to height.

4) when receiving effective address, address matching (AM) is set to height.

5) when receiving effective data packet (CRC check is correct), remove lead code, address and CRC bit, data preparation Ready (DR) is set to height.

6) microprocessor setting TRX_CE is low, into standby mode.

7) microprocessor reads valid data by SPI interface at a suitable rate.

8) after all valid data are read, AM and DR are set low.

At this time, 9) ShockBurst TM reception patterns, sending mode or shutdown mode can arbitrarily be entered.

Fig. 4 is that digital light intensity sensor circuit is a kind of integrated circuit of twin wire serial bus interface, is regarded close to people Feel the light of sensitivity.Since Highgrade integration digital light intensity Acquisition Circuit peripheral component is seldom；U1 is number in Fig. 4 Light intensity sensor, for detecting the signal of external illuminance, R2, R3, R4 is pull-up resistor；Due to digital light intensity collection electricity Road uses low-power consumption to power；And U1 microprocessors use 5V voltages in Fig. 2, therefore the power supply of a 3.3V is needed to supply Electricity, U2 is using a high-precision low-power consumption, 3 pin LDO high voltage adjuster chips in Fig. 4；Export stable 3.3V voltages.

Fig. 6 is going out in terms of structure chart, after exterior light is detected according to the high-precision photodiode PD for being approached human eye reaction, PD electric currents are converted to by PD voltages by AMP integrated operational amplifiers, 16 digit digital datas are obtained by ADC analog-digital converters. Logic + IC Interface（Logic+IC interfaces）Luminous intensity calculates and I2C bus interface, including lower column register：Data Register → light intensity data deposit.Initial value is：“0000_0000_0000_0000”.Time of measuring register, time measurement Data register.Initial value is：“0100_0101”.OSC internal oscillators（Clock frequency representative value：320kHz）.The clock is Internal logic clock.

16 digit digital datas are obtained by ADC analog-digital converters, data processing and storage are then carried out by logic.OSC is interior The oscillator in portion provides internal logic clock, by instructing operation that can read out the photometric data of storage inside accordingly.Number The I2C buses of standard are used according to transmission.Dazzle light is projected on sensor, sensor data acquisition part luminous intensity sensing The data that device acquisition comes are stored in data register, and data conversion is carried out after data are read, a 10,010,000,000 Bits per inch is next according to conversing, and the read-write for passing through the program address to sensor manipulates system.

Communication between digital light intensity sensor and microprocessor uses the I2C communications protocol of standard.I2C buses are one The twin wire universal serial bus that kind is developed by PHILIPS companies, for connecting microprocessor and its peripheral equipment.I2C buses are passing It send and three types signal is shared in data procedures, they are respectively：Commencing signal, end signal and answer signal.Microprocessor Various control commands are sent to Fig. 4 by I2C interface and read measurement data.

U1 microprocessors send control command step to Fig. 4 in Fig. 2：（1）Microprocessor generates communication enabling signal；(2) Microprocessor sends the address date of 8bit（Last position of wherein address should be 0, represent write order）；(3) microprocessor is read Take the answer signal of Fig. 4；(4) microprocessor sends the order data of 8bit；(5) microcomputer reads response；(6) microprocessor Generate stop signal.

Microprocessor reads data step from Fig. 4：(1) microprocessor generates communication enabling signal；(2) microprocessor is sent The address date of 8bit（Last position of wherein address should be 1, represent read command）；(3) microcomputer reads response；(4) it is micro- Processor reads most-significant byte data；(5) microprocessor generates answer signal；(6) microcomputer reads least-significant byte data；(7) micro- place It manages device and generates answer signal；(8) microprocessor generates stop signal.

Digital light intensity sensor sensitivity characteristic (wavelength of peak sensitivity representative value:It is 560nm) strong according to the light of collection Degrees of data is detected and can be adjusted in a program, and the high-resolution of 1~65535 lx of input light variation range is originally set Count illumination >=20LX of high beam.

Microprocessor sends various control commands to optical sensor by I2C interface and reads measurement data.

Microprocessor sends control command step to optical sensor.

1. microprocessor generates communication enabling signal.

2. microprocessor sends the address date of 8bit（Last position of wherein address should be 0, represent write order；

3. the answer signal of microcomputer reads optical sensor.

4. microprocessor sends the order data of 8bit.

5. microcomputer reads response.

6. microprocessor generates stop signal.

Microprocessor reads data step from optical sensor.

1. microprocessor generates communication enabling signal.

2. microprocessor sends the address date of 8bit（Last position of wherein address should be 1, represent read command.

3. microcomputer reads response.

4. microcomputer reads most-significant byte data.

5. microprocessor generates answer signal.；

6. microcomputer reads least-significant byte data；

7. microprocessor generates answer signal.

8. microprocessor generates stop signal.

Instruction set：The instruction of instruction set issues optical sensor by controller, first sends out the write address of module, then bristles with anger It enables.

Measurement pattern explanation：3 kinds of measurement pattern parameters.

This system uses H resolution models, actual value and measured value relationship such as following formula.

High resolution mode 1：Actual value=measured value * (69*X)/1.2（Present design uses pattern 1）.

High resolution mode 2：Actual value=measured value * (69*X)/(1.2*2).

Digital illuminance sensor sends and receives answer signal by the data register to internal register of detection.To P1.0 (SCL) and P1.2 (SDA)；I2C bus transmission datas.Microprocessor monitors arrive, and open and receive permission pattern, are sent out to serial ports Send or receive data.The data being detected by the transmission of wireless two-way module are handled to U1 microprocessor controllers in Fig. 2.

Fig. 5 is relay driver interface circuit diagram, the I/O ports of Q1 transistor bases and U1 microprocessor controllers in Fig. 2 P2.3 connections;Collector connects the distance light circuit for lamp that the series connection of JK1 relay coil .K1 normally-closed contacts is connected to automobile；K2 normally-closed contacts are simultaneously It is connected to the dipped beam circuit for lamp of automobile.Relay is driven by the PNP triode of Q1.During booting, U1 microprocessor controllers in Fig. 2 I/O ends P2.3 after initialization is high level, and triode ends, so relay is in release conditions always after booting.If P2.3 is low level, and the base stage of triode will be pulled low and generate enough base currents, make triode ON, relay line Circle will obtain electric actuation, so as to drive the corresponding normally-open normally-close contact action of relay coil, so as to fulfill to long-and-short distant light Control conversion.Relay normally closed contact K1 connects with dazzle light circuit, and normally opened contact K2 is in parallel with dipped headlight.

Fig. 2 DC power supply power supply circuits.It is made of rectification circuit of three-terminal voltage-stabilizing integrated module U6；Input terminal VDD connects automobile + 5V power supply circuits, export+3V by U6 circuit of three-terminal voltage-stabilizing integrated in figure and give Fig. 3 wireless two-way transmission circuit module for power supply Input terminal VDD intersects high beam intelligent control circuit to Fig. 2 automobile at night simultaneously and Fig. 5 distance light lamp control circuit is powered.

The logical table of high beam is as follows during cars meeting at night.

It is dipped headlight that automobile A, which opens distance light with automobile B,（I.e. high beam is to close）State

When 2 automobile meetings, the high beam illumination of automobile A detects illuminance >=20LX by automobile B illuminance collectors, U2 detects automobile A upper beam intensity, the modulus A/D conversions of acquisition controller inside in digital illuminance collector circuit diagram 4 The U1 processing into digital data transmission to microprocessor controller circuit diagram 2, microprocessor controller are sent out after judging by analysis Go out control instruction, the wireless two-way transmission circuit that automobile A is transmitted to by Fig. 3 wireless two-way transmission circuits receives by Fig. 2 Instruction is sent out after U1 microprocessor controllers U1 processing, and I/O ports P2.3 is set low into current potential;Q1 is connected JK1 relays and is attracted in Fig. 5, So as to which the corresponding contact K1 of relay be driven to disconnect, K2 is closed, and automobile A high beams is switched to dipped headlight state, until automobile It is delayed after meeting certain time（Setting 5-10 seconds）After revert to high beam state.

It is dipped headlight that automobile B, which opens distance light with automobile A,（I.e. high beam is to close）State.

Same principle:When 2 automobile meetings, the high beam illumination of automobile B detects light by automobile A illuminance collectors During illumination >=20LX, U2 detects automobile B upper beam intensity in digital illuminance collector circuit diagram 4, in acquisition controller Portion modulus A/D is converted into U1 processing in digital data transmission to microprocessor controller circuit diagram 2, and microprocessor controller passes through Control instruction is sent out after analytical judgment, the wireless two-way transmission circuit that automobile B is transmitted to by Fig. 3 wireless two-way transmission circuits connects Receipts sends out instruction after U1 microprocessor controllers U1 processing in Fig. 2 and I/O ports P2.3 is set low current potential;Q1 is connected in Fig. 5 JK1 relays are attracted, and so as to which the corresponding contact K1 of relay be driven to disconnect, K2 is closed, and automobile B high beams are switched to dipped headlight State is delayed certain time after automobile meeting（Setting 5-10 seconds）After revert to high beam state.

Automobile A and automobile B open high-beam condition simultaneously.

As AB two（Containing multi-section）Automobile opens simultaneously high beam when meeting at night, the illuminance acquisition control of automobile A/B When device processed detects automobile B/A upper beams illumination >=20LX, in digital illuminance collector circuit diagram 4 U2 detect automobile A, B upper beam intensity, acquisition controller inside modulus A/D are converted into digital data transmission to microprocessor controller circuit diagram 2 U1 processing, microprocessor controller send out control instruction after judging by analysis, emit by Fig. 3 wireless two-ways transmission circuit Instruction is sent out by I/O after U1 microprocessor controllers U1 processing in Fig. 2 to the wireless two-way transmission circuit reception of automobile A, B Port P2.3 sets low current potential;Q1 is connected JK1 relays and is attracted in Fig. 5, and so as to which the corresponding contact K1 of relay be driven to disconnect, K2 is closed It closes, automobile A, B high beam is switched to dipped headlight state, is delayed after automobile meeting certain time（Setting 5-10 seconds） After revert to high beam state.

The design wireless two-way automobile high beam controller system is mainly made of hardware and software two large divisions.

The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention. A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one The most wide range caused.

Claims (5)

1. wireless two-way cars meeting at night distance light light intelligent control system of the present invention, it is remote to be that one kind is related to digital light intensity collection Journey intelligent control technology, more particularly to a kind of high beam wireless two-way control technology, belong to automobile manufacture industry and light without Line double-direction control technical field, system are mainly made of hardware and software two large divisions, and hardware components are that whole system performs Basis, it is mainly the platform that software provides program operation；And software section, it is the signal embodied to hardware port, is subject to Acquisition, analysis, processing, the final various functions to be realized of realization system it is characterised in that it includes：3. the master controller leads to Crossing will by 1. wireless two-way transmission circuit after I2C bus communications interface reads the 2. collected data of high beam digital light intensity 16 high accuracy number light intensity sensor data call wireless two-way transmitting-receiving by 3. master controller main program commander and control Sub- journey, so as to fulfill the high beam on wireless two-way control automobile；3. microprocessor further includes main control（Microcontroller）System master Program, wireless two-way transmitting-receiving subprogram, digital light intensity sensing acquisition subprogram.

2. according to claim 1 digital light intensity collection photosensitive circuit it is characterized in that:It is digital light intensity including U1 in Fig. 4 Integrated chip（Sensor）, for detecting the signal of external illuminance；R2, R3, R4 are pull-up resistors；Digital light intensity collection electricity Road uses low-power consumption to power；And U1 microcontrollers use 5V voltages in Fig. 2, therefore the power supply power supply of a 3.3V is needed, U2 uses a high-precision low-power consumption, 3 pin LDO high voltage adjuster chips in Fig. 4；Export stable 3.3V voltages；U1 by Analog-digital converter obtains 16 digit digital datas, and then carry out data processing by logic instructs operation i.e. with storage by corresponding The readable photometric data for taking out storage inside；Communication between sensor and master controller uses the I2C communications protocol of standard.

3. according to claim 1 wireless two-way transmission circuit it is characterized in that:It is used including U2 in Fig. 4 using low-consumption wireless Two-way chip contains the integrated circuit of radio-frequency enabled and logic control function, is internally integrated voltage controlled oscillator, phaselocked loop electricity Road, power amplification circuit, low noise amplifier circuit, modulation-demodulation circuit, frequency converter, intermediate level circuit；The match circuit of RF front ends Design, the impedance of RF chip emissions and receiving port is not 50 Ω impedances of standard, and the reception that reach best must Input impedance must be allowed to antenna match with 50 Ω by the compensation of peripheral components, circuit Y2 as shown in Figure 4 is the filter of sound surface Wave device, for the signal other than allocated frequency band of decaying, L2, C3, C22 is impedance matching network, L4, L5, voltage controlled oscillator inductance, Voltage controlled oscillation inductance is adjusted, module can be made to work in different frequencies, C7, R3, C8 is phase-locked loop circuit, and main radio frequency leads to Parameter programmable is interrogated, by programing work in 3 ISM bands of 433/868/915MHz, is led to using SPI interface and microprocessor Letter, configuration is very convenient, wherein being dynamically arranged, this system setting working frequency is 433MHZ, works in 433MHZ and opens ISM Frequency range exempts from licensing use, has the characteristics of receiving sensitivity is high, strong interference immunity, communication is stablized, operating voltage for 1.9~ 3.6V, state is only 2.5uA under standby mode；Only need to occupy U1 master controllers in Fig. 22 I/O ports and 2 private ports It can work normally such as, that define here is P3.0 (RXD) and P3.1 (TXD)；4 kinds of operating modes of design of operating modes, It is converted by SET_A and SET_B pins, 4 kinds of patterns can be converted mutually, general modfel（Pattern 0）As SET_A=0, SET_B When=0, module is operated in pattern 0.

4. according to claim 1 distance light lamp control circuit it is characterized in that:Including relay circuit figure, amplifying triode Q1 bases The I/O ends P2.3 of the 3. microcontroller of pole map interlinking 2；Collector connects JK1 relay coils；J1 contacts are connected respectively is connected to the high beam of vehicle With dipped beam circuit for lamp.

5. wireless two-way cars meeting at night distance light light intelligent control system program (firmware) its feature according to claim 1 It is:Including microprocessor（Microcontroller）Main program, wireless two-way transmitting-receiving subprogram, digital light intensity sensing acquisition subprogram, It is solidificated in the microprocessor (U1).