CN101123561A - Intelligent car body network system - Google Patents
Intelligent car body network system Download PDFInfo
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- CN101123561A CN101123561A CNA2007100990389A CN200710099038A CN101123561A CN 101123561 A CN101123561 A CN 101123561A CN A2007100990389 A CNA2007100990389 A CN A2007100990389A CN 200710099038 A CN200710099038 A CN 200710099038A CN 101123561 A CN101123561 A CN 101123561A
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Abstract
An intelligent motorcar body network system comprises a semaphore input module, a front motorcar lamp module, a rear motorcar lamp module, a CAN / LIN gateway module, an electric window module, a wiper module, a central lock module and a rearview mirror module. The present invention applies both CAN and LIN buses for networking, realizing the distributed layout of a network, wherein the front motorcar lamp module, the rear motorcar lamp module, the semaphore input module and the CAN / LIN gateway module are connected together via the CAN bus to construct a network, along with which a motorcar power CAN network forms a large network, and the electric window module, the wiper module, the central lock module, the rearview mirror module and the CAN / LIN gateway module are connected together via the LIN bus to form a LIN network. The present invention is connected with the upper-layer CAN network by means of the CAN / LIN gateway module to perform information interaction. The present invention realizes the functions of information interaction with the motorcar power CAN bus, power supply management, etc. and reduces cost and cabling difficulties.
Description
Technical field
The present invention relates to a kind of body of a motor car network control system, particularly intelligent body network control system.
Background technology
At present, traditional wire beam control system mode and network control mode are adopted in body of a motor car control usually.Wherein traditional wire beam control system belongs to open loop control by the control of relay realization to each parts of body of a motor car, and wire harness is many, difficult wiring, and its reliability, information monitoring and the aspect such as share and all lag behind network control system will progressively be replaced by network control mode.Network control mode is to constitute localized network by bus to realize controlled function, present network control mainly contains CAN bus and two kinds of control modes of LIN bus, CAN Bus Speed height, real-time is good, and can carry out information interaction with the dynamical system of car load very easily, help car load control, but because to the hardware requirement height, the cost height, the relatively dispersion because car body component distributes simultaneously, and some does not have too high request to real-time, thereby realize that with the CAN bus network control of whole vehicle body makes its cost too high, while is fundamentally improved wiring because CAN is the communication of two-wire system, and the too many performance that influences the demanding car load power of real-time CAN of node on the CAN network.
As patent 200510122299.9 " intelligent automobile body network control system device and control thereof ", the parts that vehicle body is all realize that with the CAN bus its CAN network node is many, difficult wiring, and cost height.
The LIN bus adopts host-guest architecture, be the single-line type communication, can reduce the cost of vehicle body network greatly, reduce body harness simultaneously, reduce the wiring difficulty, but it is because speed is low, real-time is not high, can not satisfy the demanding parts of real-time for car light etc., can not carry out information interaction with the CAN network of power assembly simultaneously, thereby can't guarantee the failure diagnosis of car load, managing electric quantity.As patent 200410046989.6 " intelligent body network control system ", all car body components all adopt the LIN bus to realize, though can reduce the wiring difficulty, reduce cost, but the parts such as car light high to real-time can not guarantee its real-time, and can't carry out information interaction with the CAN bus of power assembly, can't realize the failure diagnosis of car load, the battery management function realizes.
Summary of the invention
The objective of the invention is in order to overcome prior art at cost, the deficiency of aspect such as function and information interaction, provide a kind of and can control front and back car light module, rearview mirror, rain brush, central controlled lock and motorized window, and show each unit status of vehicle body and fault message in real time, can participate in the car load power management, body of a motor car network control system simultaneously with low cost.
In order to realize above-mentioned functions, the present invention has adopted CAN, the common networking of LIN bus, realize the layout of network distribution type, the demanding module of real-times such as car light is adopted CAN module at a high speed, the less demanding module of real-times such as rain brush, rearview mirror is adopted the LIN bus of the low speed difficulty that reduces cost and connect up, by the communication between two networks of CAN/LIN gateway realization, realize carrying out functions such as information interaction and power management simultaneously with car load power CAN bus.
Intelligent car body network system of the present invention comprises semaphore input module, front car light module, back car light module, CAN/LIN gateway module, motorized window module, rain brush module, central controlled lock module and rearview mirror module.Front car light module wherein, back car light module, semaphore input module link to each other by the CAN bus with the CAN/LIN gateway module and constitute network, form a big network with car load power CAN network; The motorized window module, the rain brush module, the central controlled lock module utilizes the LIN bus to link to each other with rearview mirror module and CAN/LIN gateway module, forms the LIN network, and is connected with the CAN network on upper strata by the CAN/LIN gateway module, carries out information interaction.
Semaphore input module realizes the input of driver's operation, and the output of each unit information of vehicle body shows, and the input of part switching value.
The CAN/LIN gateway is responsible for conversion and the information interaction between CAN bus and the LIN bus, and the LIN network is dispatched as the host node of LIN network, hardware using PIC18F258 chip is as conversion of signals and LIN host node scheduling chip, adopt the TJA1020T chip to link to each other by the serial ports of serial ports with the PIC18F258 chip, link to each other with the LIN network by the LIN interface on the TJA1020, realize the conversion of LIN bus signals, adopt the TJA1050 chip to link to each other, link to each other with the CAN network by the CAN on the TJA1050 by the serial ports of serial ports with the PIC18F258 chip.
The front car light module is identical with back car light module hardware structure, comprises microprocessor PIC18F258, CAN interface chip TJA1050, drive circuit, voltage-stabilized power supply circuit.Microprocessor PIC18F258 is used for the communication of CAN network, the realization of car light function and failure diagnosis.CAN interface chip TJA1050 is used for the conversion of rs 232 serial interface signal and CAN signal.Driver module is made up of chip for driving BTS6402S2T and peripheral circuit, is used for driving car light, and whether the control car light works, and inspection vehicle lamp failure information.Voltage-stabilized power supply circuit is used for providing stable 5V power supply to said chip.The connected mode of above-mentioned each module is as follows: microprocessor PIC18F258 links to each other by the serial ports of serial ports with the CAN interface chip, link to each other with the I/O mouth of drive circuit by the I/O mouth, power module of voltage regulation is respectively with microprocessor, the power supply of CAN interface chip and power driving circuit links to each other, for above-mentioned module provides stable 5V power supply.
Above-mentioned each module is formed a localized network by the CAN bus, and its communication speed is 250kbps, and the application layer protocol coding adopts the coding rule of SAE J1939.
The motorized window module, the rain brush module, central controlled lock module and rearview mirror module are LIN from node, wherein motorized window module, rain brush module are identical with central controlled lock module hardware structure, by microprocessor, and the LIN bus interface circuit, drive circuit, position signalling input circuit and voltage-stabilized power supply circuit are formed.Wherein microprocessor adopts the PIC16F688 chip, is used for carrying out the LIN communication and sends different instructions to drive circuit according to respective input signals, works under different mode thereby control each parts.The LIN bus interface circuit is made up of TJA1020 chip and peripheral circuit, is used for the conversion of LIN signal.Drive circuit is made up of BTS640S2 chip and peripheral circuit, and its effect is the control signal of sending according to microprocessor, drives each parts and works in different patterns, and realize failure diagnosis and defencive function.The effect of position signalling input circuit is that the state information with each parts is input to microprocessor.The voltage-stabilized power supply circuit effect is upwards to state microprocessor, and LIN bus interface circuit, drive circuit, position signalling input circuit provide a stable 5V power supply.
Wherein microprocessor links to each other by the serial ports of the TJA1020 in serial ports and the LIN bus interface circuit, link to each other with the position signalling input circuit with drive circuit respectively by the I/O mouth, voltage-stabilized power supply circuit and microprocessor, the power supply of LIN bus interface circuit and drive circuit links to each other, for these circuit provide stable 5V power supply.
The rearview mirror module comprises microprocessor PIC16F688, voltage-stabilized power supply circuit, LIN communication interface circuit, drive circuit and current comparison circuit.The connected mode of each circuit such as following: voltage-stabilized power supply circuit respectively with microprocessor PIC16F688, LIN communication interface circuit, the power end of drive circuit and current comparison circuit links to each other, and stable 5V power supply is provided for above-mentioned module.Microprocessor PIC16F688 links to each other by the serial ports of serial ports with LIN communication interface circuit, carry out the mutual of LIN signal, link to each other with the chip pin that latchs of drive circuit by the I/O mouth, output chip selection signal and control command are given drive circuit, the input of current comparison circuit links to each other with drive circuit, accept the rearview mirror state information that drive circuit transmits, export to the I/O pin of microprocessor PIC16F688 after treatment.
The instruction that the rearview mirror module can transmit according to the LIN bus is adjusted rearview mirror level and vertical angle according to different running car modes, improves driver's visual angle.
Form the LIN bus network with upper module and CAN/LIN gateway module.
The control mode of intelligent car body network system of the present invention is as follows:
Semaphore input module, by real-time detection driver the unit switch position is judged in the operation of unit switch, and the CAN bus signals that is converted into of this position correspondence sent on the CAN bus, accept each unit information of sending back from the CAN bus simultaneously and show.
Front/rear car light module by the instruction of accepting to transmit from bus after, through decoding, judge, send corresponding instruction then, thereby the open and close of control light and detects the state of each lamp in real time to drive circuit.When short circuit occurring, when fault such as opening circuit, drive circuit is transformed into guard mode automatically and fault message is sent on the bus.
The instruction of CAN/LIN gateway module by accepting to transmit on the CAN bus, through decoding, corresponding instruction is converted into the LIN bus signals sends to the LIN bus, judge each parts work state information of accepting on the LIN bus according to the LIN bus signals that sends simultaneously, if break down, failure code is converted into the CAN signal sends on the CAN bus.
The instruction of motorized window module by accepting to transmit from the LIN bus; be converted into corresponding instruction after the decoding and issue drive circuit; drive circuit rises or descends according to the commands for controlling power windows; the motorized window positional information of the real-time detection position of while microprocessor signal input circuit input; if motorized window is closed (or opening fully); then do not carry out rising (or decline) operation; if motorized window breaks down; drive circuit will transfer protected mode automatically to; and fault sent to microprocessor, when microprocessor is subjected to requiring on the LIN bus sending the instruction of failure code, the fault instruction is sent on the LIN bus.
The instruction of rain brush module by accepting to transmit from the LIN bus, be converted into corresponding instruction after the decoding and issue drive circuit, drive circuit works at a high speed according to the commands for controlling rain brush, low speed, gap are scraped water or stop mode, simultaneously the rain brush positional information of the real-time detection position of microprocessor signal input circuit input, when water is scraped in the gap, when detecting rain brush and being in the below of windshield, will wait for a period of time, sending instructions then allows rain brush work; If instruction is when closing; continue to allow rain brush work; detect the below whether rain brush is in windshield simultaneously; stop rain brush work if then send instruction; if rain brush breaks down; drive circuit will transfer protected mode automatically to, and fault is sent to microprocessor, when microprocessor is subjected to the instruction of requirement transmission failure code on the LIN bus fault instruction be sent on the LIN bus.
The instruction of central controlled lock module by accepting to transmit from the LIN bus; be converted into corresponding instruction after the decoding and issue drive circuit; drive circuit is opened according to the commands for controlling central controlled lock or is locked; the central controlled lock positional information of the real-time detection position of while microprocessor signal input circuit input; judge whether to open or close central controlled lock according to this location status; if central controlled lock breaks down; drive circuit module will transfer protected mode automatically to; and fault sent to microprocessor, when microprocessor is subjected to requiring on the LIN bus sending the instruction of failure code, the fault instruction is sent on the LIN bus.
The instruction of rearview mirror module by accepting to transmit from the LIN bus; be converted into corresponding instruction after the decoding and issue drive circuit; drive circuit is adjusted rearview mirror level and vertical angle according to instruction; if the rearview mirror motor breaks down; drive circuit will transfer protected mode automatically to; and fault sent to microprocessor, when microprocessor is subjected to requiring on the LIN bus sending the instruction of failure code, the fault instruction is sent on the LIN bus.
Advantage of the present invention is as follows:
(1) adopts the common networking of CAN and LIN to realize distributed automobile vehicle body network, reduce the wiring quantity of car body component effectively, reduce the wiring difficulty;
(2) because the employing of LIN bus greatly reduces the cost of vehicle body network, owing to adopt two-tier network, significantly reduced the load of upper strata CAN network simultaneously, reduce its influence to car load dynamical system CAN bus;
(3) will realize with the CAN network the demanding car light module of real-time, satisfy its performance requirement;
(4) adopt the CAN/LIN gateway, can make all parts of vehicle body constitute a whole network, thereby can carry out real-time, interactive, can realize the failure diagnosis of car load and the power management function of car load with car load dynamical system CAN network;
(5) the Shi Junneng realization is automatic to be protected when each parts of body of a motor car break down;
(6) realized the functional control of each parts of vehicle body.
Description of drawings
Below in conjunction with the drawings and the specific embodiments the present invention is described in further detail.
Fig. 1 is the structured flowchart of intelligent automobile body network of the present invention;
Fig. 2 is CAN conversion chip and microcontroller interface circuit;
Fig. 3 is LIN conversion chip and microcontroller interface circuit;
Fig. 4 is a voltage-stabilized power supply circuit;
Fig. 5-the 1st, car light module control circuit schematic diagram of the present invention;
Fig. 5-the 2nd, car light module controls flow process;
Fig. 6-the 1st, motorized window/rain brush modular circuit schematic diagram;
Fig. 6-the 2nd, the motorized window control flow chart;
Fig. 6-the 3rd, the rain brush control flow chart;
Fig. 6-the 4th, the central controlled lock control flow chart;
Fig. 7-the 1st, rearview mirror drive circuit schematic diagram;
Fig. 7-the 2nd, rearview mirror current comparison circuit figure;
Fig. 7-the 3rd, the rearview mirror control flow chart.
Embodiment
As shown in Figure 1, the CAN network that the present invention is made of semaphore input module, front car light module, back car light module and CAN/LIN network, and form by the LIN network that CAN/LIN gateway module, rearview mirror module, motorized window module, rain brush module and central controlled lock module constitute.Front car light module wherein, back car light module, semaphore input module link to each other by the CAN bus with the CAN/LIN gateway module and constitute network, form a big network with car load power CAN network; The motorized window module, the rain brush module, the central controlled lock module utilizes the LIN bus to link to each other with rearview mirror module and CAN/LIN gateway, forms the LIN network, and is connected with the CAN network on upper strata by the CAN/LIN gateway module, carries out information interaction.
Figure 2 shows that the CAN interface circuit schematic diagram that microprocessor and CAN conversion chip TJA1050 constitute in the CAN node.This circuit all comprises this circuit in each node of CAN network, and structure is identical, can reduce the difference of each module like this, realizes the modularization exploitation, helps reducing development time and cost.Wherein microprocessor adopts PIC18F258, and the TX by microprocessor links to each other with RX with the TX of RX port with CAN conversion chip TJA1050, and the VCC of TJA1050 exports with stabilized voltage power supply and links to each other, and GND links to each other with ground, and CANH and CANL are connected on the CAN bus.
All CAN node modules comprise semaphore input module, the front car light module, and back car light module and CAN/LIN module all comprise reconfiguration mouth circuit, realize the information interaction with the CAN bus.
Figure 3 shows that LIN conversion chip and Microprocessor Interface circuit, be divided into the host node circuit and from node circuit, the host node circuit application is applied to other node of LIN network from node circuit in the CAN/LIN gateway node.The host node circuit microprocessor is the PIC18F258 chip, link to each other with the NSLP port with RX, the TX of LIN conversion chip TJA1020 with Px.x by RX, TX, the BAT of TJA1020 chip links to each other with the output of NWAKE pin and voltage-stabilized power supply circuit, the INH pin links to each other with the LIN port with a 1k resistance series connection back with diode, the LIN port links to each other with ground by electric capacity 1, is connected to the LIN bus simultaneously; From node host node circuit microprocessor is the PIC16F688 chip, link to each other with the NSLP port with RX, the TX of LIN conversion chip TJA1020 with Px.x by RX, TX, the BAT of TJA1020 chip links to each other with the output of NWAKE pin and voltage-stabilized power supply circuit, the LIN port links to each other with ground by electric capacity 1, is connected to the LIN bus simultaneously.
Wherein the CAN/LIN gateway module as the LIN network host node comprises the host node circuit that LIN transforms chip and Microprocessor Interface circuit, the motorized window module, and the rain brush module, central controlled lock module and rearview mirror module comprise from node circuit.
Figure 4 shows that voltage-stabilized power supply circuit, the voltage-stabilized power supply circuit structure of all nodes is all identical, can reduce the difference of each module like this, realizes the modularization exploitation, helps reducing development time and cost.Automobile storage battery provides the supply power voltage of 12V, this voltage place in circuit VBB place, circuit is divided into two parts then: a part is by capacitor C 13 ground connection, purpose is the high-frequency ac part in the elimination circuit, another part process diode D2, fuse F1, inductance L 1 is connected to the IN pin of voltage transitions chip LM2931, after inductance L 1, two capacitor C 4 in parallel, C14 before the IN pin.The purpose of diode D2 is to suppress current feedback, guarantee the independence of power supply, the effect of fuse F1 is to prevent the excessive components and parts that burn the back of electric current, and inductance L 1 and capacitor C 4, C14 form low pass LC filter, for the voltage transitions chip provides pure, stable power supply.After the conversion of voltage transitions chip, line voltage distribution becomes 5V, utilizes capacitor C 8, C9, C10, C15 to obtain voltage VCC after the filtering once more, as the supply power voltage of each chip in the circuit.
Be depicted as car light module control circuit schematic diagram of the present invention as Fig. 5-1.The car light module control circuit is made up of with microcontroller interface circuit and drive circuit voltage-stabilized power supply circuit shown in Figure 4, CAN conversion chip shown in Figure 2.Drive circuit divides 8 modules, structure is identical, control different lamp work, drive circuit chip is BTS640S2T, wherein the ST of drive circuit chip BTS640S2T links to each other with OUx with the STx of IN pin with microprocessor PIC18F258 chip I/O mouth, be used for transmitting the various instructions of microprocessor and state, the fault message that transmits lamp, pin OUT links to each other with lamp, controls the mode of operation of lamp as output.Wherein the front car light module comprise high beam, advance light modulation, left steering lamp, right turn lamp, fog lamp, side-marker lamp and warning lamp, back car light module comprises stop lamp, reversing lamp, left steering lamp, right turn lamp, side-marker lamp, license plate lamp, warning light and fog lamp.
Be depicted as car light module controls flow chart as Fig. 5-2; its controlled step is: the instruction that acceptance is transmitted from the CAN bus; and decode; the corresponding car light work of commands for controlling that obtains according to decoding then; and car light diagnosed; as short circuit or open circuit when occurring, enter protected mode, and send diagnostic code.Be specially and begin initialization after powering on I/O is set, the CAN communication module is set, the ID that accepts buffering area and filter is set; open interruption; wait for the interrupting information of CAN bus then,, then enter the information of interrupting reading on the CAN bus if having; and decoding; carry out the failure diagnosis of car light then, the different work such as car of the commands for controlling that obtains according to decoding afterwards are if diagnose wrong; then this car light is entered protected mode, send failure code then to the CAN bus.
CAN/LIN gateway module hardware circuit of the present invention is by voltage-stabilized power supply circuit shown in Figure 4, and CAN interface conversion circuit shown in Figure 2 and the LIN host node interface conversion circuit among Fig. 3 constitute.Its control flow is as follows, at first carry out chip I/O pin, CAN, LIN communication and carry out initialization, open interrupt latency CAN center line signal afterwards and signal is resolved, if the CAN signal is arranged, then the instruction that will resolve is converted into the LIN bus signals and sends to the LIN bus, wait for the answer signal of other node on the LIN bus then, if reply fault-free, then wait for next CAN bus signals, if fault is arranged, be converted into the CAN signal after the failure code that the LIN bus is transmitted is resolved and be sent to the CAN network.
Be depicted as the circuit theory diagrams of motorized window/rain brush/central controlled lock module as Fig. 6-1, the hardware circuit of three modules is identical, can realize the modularization exploitation like this, only need change software wherein can realize the exchange of hardware control circuit, reduce construction cycle and cost.Motorized window/rain brush/central controlled lock module comprises microprocessor 1PIC16F688, LIN interface circuit 2, voltage-stabilized power supply circuit 5, drive circuit 3 and position signalling input circuit 4.Microprocessor PIC16F688 is used for realizing communication and logic control function; The structure of LIN interface circuit 2 is identical from node circuit with LIN among Fig. 3; The structure of voltage-stabilized power supply circuit 5 as shown in Figure 4; Drive circuit 3 is made of chip BTS640S2T and peripheral components, is used to drive motorized window/rain brush motor.
Wherein microprocessor 1 links to each other by the serial ports of the TJA1020 in serial ports and the LIN bus interface circuit 2, link to each other with position signalling input circuit 4 with drive circuit 3 respectively by the I/O mouth, voltage-stabilized power supply circuit 5 and microprocessor 1, LIN bus interface circuit 2 links to each other with the power supply of drive circuit 3, for these circuit provide stable 5V power supply.
The device connected mode of drive circuit 3 is as follows: the pin ST of chip BTS640S2T links to each other with ground with C6 by resistance R 8, pin IN links to each other with ground with C7 by resistance R 9, be used for filtering, pin ST also links to each other with power supply VCC by resistance R 5 and draws high this pin simultaneously, and pin IS connects resistance R 10; Capacitor C 2, resistance R 4 and voltage-stabiliser tube Z1 parallel connection, and an end ground connection, another termination R10; Output pin OUT1 links to each other with inductance L 1, and the L1 other end links to each other with plug connector J4 with capacitor C 5, the other end ground connection of C5, and output pin OUT2 links to each other with ground by capacitor C 3.Control signal is sent to the IN pin of this chip by microprocessor 1; the ST of this chip, IS pin are given microprocessor 1 with chip state of living in and protection information feedback; when microprocessor 1 is judged working state abnormal by the state of ST and IS; to control it quits work; the output OUT pin of this chip is through capacitor C 3; the filtering of C5 and inductance L 1 is exported to motor by standard plug connector J3 after removing the pulse shock of output.
Position signalling input circuit 4 is by resistance R 3, R11, capacitor C 1 and voltage stabilizing didoe Z3 and standard plug connector J3 form, wherein R3 one end links to each other with VCC, one end links to each other with R2, the R2 other end links to each other with connector J3, capacitor C 1 and voltage-stabiliser tube Z3 are connected in parallel, an and end ground connection, the junction of one termination R2 and R3, motorized window/Wiper motor position signalling passes through the step-down of R3 and R11 then by J3 in-position signal input circuit 4, and the laggard RA0 pin of going into microprocessor 1 of Z3 voltage stabilizing and C1 filtering.
The motorized window controlled step is shown in Fig. 6-2, microprocessor 1 initialization, and open interruption, enter sleep state afterwards to save electric energy, when having control command to transmit in the LIN bus, microprocessor 1 is waken up, and change the corresponding work state over to according to the control command that obtains, its state is determined by motor status (MOTORSTATE), at first judge motor status, when judging that motor status is 1, the expression motorized window rises, little processing this moment is with the position signalling of detection position signal input circuit input, judge whether power windows has arrived closed condition, if no show off-position, machine operation is raise vehicle window, if arrived off-position, then stop machine operation, carry out failure diagnosis afterwards, if fault arranged then send failure code to the LIN bus, if not then get back to sleep and wait for next circulation, when judging that motor status is 2, the expression motorized window descends, little processing this moment judges whether power windows has arrived full-gear, if do not have with the position signalling of detection position signal input circuit input, machine operation is descended vehicle window, if reached full-gear, then stop machine operation, carry out failure diagnosis afterwards, if fault arranged then send failure code to the LIN bus, if not then get back to sleep and wait for next circulation.
The rain brush controlled step is shown in Fig. 6-3, control command arrives the rain brush controller by the LIN bus transfer, after the reception of the LIN bus transceiver in the rain brush controller, pass to microprocessor 1, after 1 pair of signal of microprocessor is analyzed, judges, is handled, export different control signals according to the result who handles to motor-drive circuit 3, thereby make rain brush be operated in different mode of operations.The chip for driving output response of drive circuit 3 is fast, and have overvoltage and current-limiting protection function, under the normal condition, its output changes with input, microprocessor 1 sends the operating state that different control signals changes motor, during low or first gear, microprocessor 1 sends the control signal of certain duty ratio, makes the swing of rain brush low speed; During top gear, it is 0 high-level control signal that microprocessor 1 sends duty ratio, and drive circuit 3 sends constant high voltage thereupon and comes drive motors, makes the rain brush high speed swinging; Intermittently during shelves microprocessor 1 rain brush whenever scrape water once after, monitor the rain brush position signalling, transmit control signal through after certain time-delay again, thereby scrape water the intermittence of realizing rain brush, this delay time length data that can transmit by the LIN bus are easily made amendment simultaneously; When stopping, microprocessor 1 does not make the motor stall at once, but keeps electric machine operation state constant, and constantly monitor the position signalling of Wiper motor, turn-off order when monitoring to send when the rain brush position is in stop position, make the motor stall, thereby guarantee that rain brush is parked in its stop position.If fault, as overvoltage, situations such as electric current is excessive, chip for driving will be returned to microprocessor 1 with malfunction by pin, microprocessor 1 sends different control signals according to fault and rain brush is stopped or working and other states, failure code can be issued the LIN bus by the LIN receiver simultaneously.
Microprocessor 1 course of work is: after automobile powers on, microprocessor 1 initialization, and open interruption, enter sleep state afterwards to save electric energy, when having control command to transmit in the LIN bus, microprocessor 1 is waken up, and change the corresponding work state over to according to the control command that obtains, its state is determined by motor status (MOTORSTATE), at first judge motor status, when judging that motor status is 1, the expression rain brush works in low speed, be provided with microprocessor 1 this moment, and to export to the control signal duty ratio of drive circuit be corresponding numerical value, rain brush works in the low speed operating mode, if be not 1, then continue to judge whether motor status is 2, if judge that motor status is at 2 o'clock, be the middling speed operating state, it is corresponding numerical value that microprocessor 1 is adjusted the control signal duty ratio of exporting to drive circuit 3, makes rain brush in middling speed work, if be not 2, then continue to judge whether motor status is 3,, be the high speed operation state if judge that motor status is 3, adjust microprocessor 1 this moment, and to export to the control signal duty ratio of drive circuit be 1, the rain brush high speed operation if be not 3, continues to judge whether motor status is 4, if, rain brush works in intermittently scrapes water state, and adjust the control signal duty ratio this moment is the low cruise state, monitors the rain brush position signalling that obtains from signal input circuit simultaneously, when its when low, enter interruption, delay procedure is set enters time-delay, after delay time arrives, continuation is with the driven at low speed machine operation, thereby scrapes water the intermittence of realizing rain brush; If be not 4, then turn off interruption, continue then to judge whether motor status is 5, if 5, then be the rain brush stop signal, microprocessor 1 will constantly be monitored rain brush and whether be arrived stop position (the RA0 pin corresponding to microprocessor 1 is 0), if the RA0 pin is not 0, rain brush does not arrive stop position, then continues to operate in lower-speed state, if RA0 is 0, then arrive stop position, to order the motor stall, rain brush quits work, and microprocessor 1 enters resting state simultaneously.
The controlled step of central controlled lock is shown in Fig. 6-4, at first initialization system clock and working method, enter sleep, wait for LIN bus interrupt message, receive message, detecting the central controlled lock position, judge whether current location is consistent with order, is then to enter sleep, otherwise CD-ROM drive motor is rotated, judge simultaneously that central controlled lock drives and whether put in place,, do not put in place and continue CD-ROM drive motor and rotate if put in place then stop motor driven, when central controlled lock drives the laggard capable fault detect that puts in place, if fault is arranged then send fault, enter sleep then, if fault-free directly enters sleep.
Two modules about the rearview mirror module is divided into, about two module software and hardware structures and function identical, include microprocessor PIC16F688, power module of voltage regulation, LIN communication interface module, drive circuit module and current comparing module.
Introduce right back visor module at this.Wherein the rearview mirror schematic diagram is made up of Fig. 7-1 rearview mirror drive circuit module and Fig. 7-2 comparison circuit module.Fig. 7-the 1st wherein, the major part of rearview mirror driver module hardware elementary diagram, the power supply 8 among Fig. 7-1, its circuit is identical with power module of voltage regulation shown in Figure 4.The 9th, single-chip microcomputer PIC16F688,10 and 11 is motor drive ic BTS7710, and wherein 10 is the motor drive ic of rearview mirror horizontal direction, is used to control moving horizontally of rear view mirror lens, 11 is the motor drive ic of rearview mirror vertical direction, is used to control the vertical moving of rear view mirror lens.12 and 13 is 8D latch 74LS373, and they can select 10 or 11 two motor drive ics according to control command.The 14th, the LIN bus is identical from node interface circuit in the LIN bus unit, its circuit and Fig. 3.The 15th, inverter 74LS04.
Connection situation between the above-mentioned module is as follows: 2 pins of single-chip microcomputer PIC16F688 are connected to 3 pins of two 8D latch 7,4LS,373 12 and 13,3 pins of PIC16F688 are connected to 11 pins of latch 12 (74LS373) top among Fig. 3, are connected to 1 pin of 74LS04 simultaneously.11 pins of the latch 13 (74LS373) below 2 pins of 74LS04 are connected among Fig. 3.11,10,9,8 pins of PIC16F688 are connected to 4,7,8,13 pins of two latchs 12 and 13 (74LS373) respectively.2,5,6,9,12 pins of 8D latch 7,4LS,373 12 are connected respectively to 8,7,9,2,13 pins of motor drive ic BTS7710 10.2,5,6,9,12 pins of 8D latch 7,4LS,373 13 are connected respectively to 8,7,9,2,13 pins of motor drive ic BTS7710 11.22,23,1,3,25,28 pins of motor drive ic BTS7710 10 connect together, and be connected to the pin 1 of motor interface CON4,20,21,12,14,15,18 pins of motor drive ic BTS7710 10 connect together, and being connected to the pin 2 of motor interface CON4, CON4 is used for the horizontal direction motor of external rearview mirror.22,23,1,3,25,28 pins of motor drive ic BTS771011 connect together, and be connected to the pin 1 of motor interface CON5,20,21,12,14,15,18 pins of motor drive ic BTS7710 11 connect together, and being connected to the pin 2 of motor interface CON5, CON5 is used for the vertical direction motor of external rearview mirror.
Fig. 7-2 comprises motor overcurrent detecting unit 16 and motor overcurrent detecting unit 17, wherein unit 16 is used for detecting the overcurrent situations of Fig. 7-1 motor drive ic BTS7710 10, and unit 17 is used for detecting the overcurrent situations of 7-1 motor drive ic BTS7710 11.Unit 16 comprises operational amplifier LM358 18 and resistance R 7, R8, capacitor C 3.Among unit 16 and Fig. 7-1 each unit to be connected situation as follows: 16 of motor drive ic BTS7710 10,17,26,27 pins connect together among Fig. 7-1, be connected to the pin 3 of operational amplifier LM358 18, the pin 1 of operational amplifier LM35818 is connected to aanalogvoltage I/O port 12 pins of single-chip microcomputer PIC16F688 9 among Fig. 7-1 simultaneously.Unit 17 comprises operational amplifier LM358 19 and resistance R 9, R10, capacitor C 5.Among unit 17 and Fig. 7-1 each unit to be connected situation as follows: 16,17,26,27 pins of motor drive ic BTS7710 11 among Fig. 7-1 are connected together, be connected to the pin 3 of operational amplifier LM358 19, the pin 1 of operational amplifier LM358 19 is connected to aanalogvoltage I/O port 7 pins of single-chip microcomputer PIC16F688 9 among Fig. 7-1 simultaneously.Because the pin 16,17,26,27 of motor drive ic BTS7710 10 and 11 is output as current signal, and the input pin 3 of operational amplifier LM358 18 and 19 requires to be voltage signal, therefore needing after the pin 16,17,26,27 of motor drive ic BTS7710 10 connects together needs through resistance R 6 ground connection after the pin 16,17,26,27 of motor drive ic BTS7710 11 connects together through resistance R 3 ground connection.
Its control flow is shown in Fig. 7-3: the back system initialization powers on, and open interruption and accept the LIN bus signals, receiving decodes behind the LIN bus signals obtains corresponding instruction, if for turning, then continue to judge to be to continue to turn or recover to keep straight on, if for turning, then adjust the level and the vertical angle of rearview mirror according to designed regular, if, then rearview mirror is returned to the normal position, if be astern signal for recovering to keep straight on, then continue to judge to be to continue reversing or parking, if continue rearview mirror is then adjusted in reversing according to designed regular level and vertical angle, if, then rearview mirror is returned to the normal position for stopping.
Claims (7)
1. an intelligent car body network system is characterized in that comprising semaphore input module, front car light module, back car light module, CAN/LIN gateway, motorized window module, rain brush module, central controlled lock module and rearview mirror module; Front car light module wherein, back car light module, semaphore input module link to each other by the CAN bus with the CAN/LIN gateway and constitute network, form a big network with car load power CAN network; The motorized window module, the rain brush module, the central controlled lock module utilizes the LIN bus to link to each other with rearview mirror module and CAN/LIN gateway, forms the LIN network, and is connected with the CAN network on upper strata by the CAN/LIN gateway module, carries out information interaction.
2. intelligent car body network system according to claim 1, it is characterized in that adopting the network configuration of layering, wherein semaphore input module, front car light module, back car light module and CAN/LIN gateway module constitute the CAN network, and each node links to each other with the CAN network by the CAN network interface circuit; CAN/LIN gateway module, motorized window module, rain brush module, central controlled lock module and rearview mirror module constitute the LIN network, wherein the CAN/LIN gateway module links to each other with the LIN bus by the host node circuit of LIN network interface circuit, and all the other modules link to each other with the LIN bus from node circuit by the LIN network interface circuit; CAN network and LIN network carry out two internetwork information interactions by the CAN/LIN gateway module.
3. according to the described intelligent car body network system of claim 2, it is characterized in that the CAN/LIN gateway module is responsible for conversion and the information interaction between CAN bus and the LIN bus, and the LIN network is dispatched as the host node of LIN network, hardware using PIC18F258 chip is as conversion of signals and LIN host node scheduling chip, adopt the TJA1020T chip to link to each other by the serial ports of serial ports with the PIC18F258 chip, link to each other with the LIN network by the LIN interface on the TJA1020, realize the conversion of LIN bus signals, adopt the TJA1050 chip to link to each other, link to each other with the CAN network by the CAN on the TJA1050 by the serial ports of serial ports with the PIC18F258 chip.
4. according to the described intelligent car body network system of claim 1, it is characterized in that the front car light module is identical with back car light module hardware structure, comprises microprocessor PIC18F258, CAN interface chip TJA1050, drive circuit, voltage-stabilized power supply circuit; Microprocessor PIC18F258 is used for the communication of CAN network, the realization of car light function and failure diagnosis; CAN interface chip TJA1050 is used for the conversion of rs 232 serial interface signal and CAN signal; Drive circuit is made up of chip for driving BTS6402S2T and peripheral circuit, is used for driving car light, and whether the control car light works, and inspection vehicle lamp failure information; Voltage-stabilized power supply circuit is used for providing stable 5V power supply to said chip; Voltage-stabilized power supply circuit links to each other with the power port of CAN interface chip TJA1050 with microprocessor PIC18F258 respectively, and microprocessor PIC18F258 links to each other with CAN interface chip TJA1050 by serial ports, links to each other with the I/O mouth of power driver module by the I/O mouth.
5. according to the described intelligent car body network system of claim 1, it is characterized in that described motorized window module, the rain brush module is identical with the hardware configuration of central controlled lock module, by microprocessor [1], LIN bus interface circuit [2], drive circuit [3], position signalling input circuit [4] and voltage-stabilized power supply circuit [5] are formed; Wherein microprocessor [1] adopts the PIC16F688 chip, is used for carrying out the LIN communication and sends different instructions to drive circuit [3] according to respective input signals, controls each parts and works under different mode; LIN bus interface circuit [2] is made up of TJA1020 chip and peripheral circuit, is used for the conversion of LIN signal; Drive circuit [3] is made up of BTS640S2 chip and peripheral circuit, and its effect is the control signal of sending according to microprocessor [1], drives each parts and works in different patterns, and realize failure diagnosis and defencive function; The effect of position signalling input circuit [4] is that the state information with each parts is input to microprocessor [1]; The effect of voltage-stabilized power supply circuit [5] is to microprocessor [1], LIN bus interface circuit [2], and drive circuit [3] and signal input circuit [4] provide a stable 5V power supply.
Microprocessor [1] links to each other by the serial ports of the TJA1020 in serial ports and the LIN bus interface circuit [2], link to each other with position signalling input circuit [4] with drive circuit [3] respectively by the I/O mouth, voltage-stabilized power supply circuit [5] and microprocessor [1], LIN bus interface circuit [2] links to each other with the power supply of drive circuit [3], for these circuit provide stable 5V power supply.
6. according to the described intelligent car body network system of claim 1, it is characterized in that the instruction that described rearview mirror module transmits according to the LIN bus, corresponding different running car modes is adjusted rearview mirror level and vertical angle, improves driver's visual angle; The rearview mirror module comprises microprocessor PIC16F688, voltage-stabilized power supply circuit, LIN communication interface circuit, drive circuit and current comparison circuit; Voltage-stabilized power supply circuit respectively with microprocessor PIC16F688, LIN communication interface circuit, the power end of drive circuit and current comparison circuit links to each other, and provides stable 5V power supply to foregoing circuit; Microprocessor PIC16F688 links to each other by the serial ports of serial ports with LIN communication interface circuit, carry out the mutual of LIN signal, link to each other with the chip pin that latchs of drive circuit by the I/O mouth, output chip selection signal and control command are given drive circuit, the input of current comparison circuit links to each other with drive circuit, accept the rearview mirror state information that drive circuit transmits, export to the I/O pin of microprocessor [1] PIC16F688 after treatment.
7. according to the described intelligent car body network system of claim 1, it is characterized in that system adopts following control method:
Semaphore input module is judged the unit switch position by real-time detection driver to the operation of unit switch, and the CAN bus signals that is converted into of this position correspondence sent on the CAN bus, accept each unit information of sending back from the CAN bus simultaneously and show;
Front/rear car light module by the instruction of accepting to transmit from bus after, judge that through decoding sending out corresponding instruction then gives drive circuit, thereby the open and close of control light, and detect the state of each lamp in real time, when short circuit occurring, when fault such as opening circuit, drive circuit is transformed into protection dress attitude automatically and fault message is sent on the bus;
The instruction of CAN/LIN gateway by accepting to transmit on the CAN bus, through decoding, then corresponding instruction is converted into the LIN bus signals after the judgement and sends to the LIN bus, judge each parts work state information of accepting on the LIN bus according to the LIN bus signals that sends simultaneously, if break down, failure code is converted into the CAN signal sends on the CAN bus;
The instruction of motorized window module by accepting to transmit from the LIN bus, be converted into corresponding instruction after the decoding and issue drive circuit, drive circuit rises or descends according to the commands for controlling power windows, the motorized window positional information of the real-time detection position of while microprocessor signal input circuit input, if motorized window is closed (or opening fully), then do not carry out rising (or decline) operation, if motorized window breaks down, drive circuit module will transfer protected mode automatically to, and fault sent to microprocessor, when microprocessor is subjected to requiring on the LIN bus sending the instruction of failure code, the fault instruction is sent on the LIN bus;
The instruction of rain brush module by accepting to transmit from the LIN bus, be converted into corresponding instruction after the decoding and issue drive circuit, drive circuit works at a high speed according to the commands for controlling rain brush, low speed, water or stop mode are scraped in the gap, the rain brush positional information of the real-time detection position of while microprocessor signal input circuit input, when water is scraped in the gap, when detecting rain brush and being in the below of windshield, to wait for a period of time then and to allow rain brush work sending instructions, if instruction is when closing, continue to allow rain brush work, detect the below whether rain brush is in windshield simultaneously, stop rain brush work if then send instruction, if rain brush breaks down, drive circuit module will transfer protected mode automatically to, and fault sent to microprocessor, when microprocessor is subjected to requiring on the LIN bus sending the instruction of failure code, the fault instruction is sent on the LIN bus;
The instruction of central controlled lock module by accepting to transmit from the LIN bus, be converted into corresponding instruction after the decoding and issue drive circuit, drive circuit is opened according to the commands for controlling central controlled lock or is locked, the central controlled lock positional information of the real-time detection position of while microprocessor signal input circuit input, judge whether to open or close central controlled lock according to this location status, if central controlled lock breaks down, drive circuit module will transfer protected mode automatically to, and fault sent to microprocessor, when microprocessor is subjected to requiring on the LIN bus sending the instruction of failure code, the fault instruction is sent on the LIN bus;
The instruction of rearview mirror module by accepting to transmit from the LIN bus; be converted into corresponding instruction after the decoding and issue drive circuit; drive circuit is adjusted rearview mirror level and vertical angle according to instruction; if the rearview mirror motor breaks down; drive circuit module will transfer protected mode automatically to; and fault sent to microprocessor, when microprocessor is subjected to requiring on the LIN bus sending the instruction of failure code, the fault instruction is sent on the LIN bus.
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| CNA2007100990389A CN101123561A (en) | 2007-05-10 | 2007-05-10 | Intelligent car body network system |
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