CN2896342Y - Central controller for automotive network system - Google Patents
Central controller for automotive network system Download PDFInfo
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- CN2896342Y CN2896342Y CNU2005201239177U CN200520123917U CN2896342Y CN 2896342 Y CN2896342 Y CN 2896342Y CN U2005201239177 U CNU2005201239177 U CN U2005201239177U CN 200520123917 U CN200520123917 U CN 200520123917U CN 2896342 Y CN2896342 Y CN 2896342Y
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Abstract
The utility model discloses a central controller that cancels the relay and the fuse, has the failure storage and display function and used in the auto network system. The controller comprises a power supply administration and CAN communication module connected to the MCU (microcontroller unit), a switch contractor scanning module, a auto speed signal regulation circuit, a motor-driven module and a LCD display module; wherein the motor-driven module comprises two ways of motor-driven circuits; a route is connected to a washing pump and the other connected with the rain wiper motor in the PWM regulation mode; the auto speed signal regulation circuit is composed of an operational magnifier LM224, a trigger HC14 and a low-speed optical coupling; the power supply administration and the CAN communication module interfaces with the MCU through the 3-wire SPI thereon; the switch contactor scanning module is connected with the MCU through the SPI interface ; the LCD display module is connected with the MCU through a coupling wire; and the auto speed signal regulation circuit is connected to the MCU through the trigger HC14.
Description
Technical field
The utility model relates to the controller in a kind of automotive networking system, relates in particular to the central controller in a kind of automotive networking system.
Background technology
In automotive networking, typical body electronics system comprises following controlling object: centrally controrlled locking system, car door and back-up case lock, glass regulator, driven rearview mirrors, various car lights, the control of front and back wiper and front and back glass washer, Defrost heater, fuel tank, skylight, warm-air drier and air conditioner, automatic seat, hummer etc.Possessing under the situation of distant control function, also comprising the reception processing of remote signal and the control of burglary-resisting system.
Central controller in the automotive networking system is to finish the requisite critical component of above-mentioned each function, at present, central controller in the automotive networking system comprises that mainly boot is opened control, fuel tank cap is opened functions such as control, remote control reception, its weak point of above-mentioned prior art is: because large power-consuming equipments such as rain brush and light can only adopt traditional relay control and fuse structure, the electromagnetic interference (EMI) phenomenon is very serious; In addition, do not receive the signal of combined switch, thereby can not reduce the wire harness under the fascia effectively; Do not possess failed storage and Presentation Function.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, be provided for the central controller of automotive networking system, the utility model can significantly reduce automotive wire bundle, cooperate other car body control module co-ordination, thereby finish controls such as light, door and window, rain brush, cancel traditional relay, fuse structure, had functions such as failed storage and demonstration.
In order to solve the problems of the technologies described above, the utility model is used for the central controller of automotive networking system, comprises the power management and CAN communication module, switch contact scan module, vehicle speed signal modulate circuit, motor drive module and the LCD display module that are connected with MCU (micro controller unit) respectively; Described motor drive module comprises respectively the two-way motor-drive circuit that links with MCU, and wherein one the tunnel connects washing pump, and another road is connected with rain shaving electrical machine with the PWM mode of speed regulation; Described vehicle speed signal modulate circuit is made of operational amplifier LM224, trigger HC14 and low speed optocoupler; Described power management and CAN communication module are by 3 line SPI and MCU interface on it; Described switch contact scan module is connected with MCU by the SPI interface, the LCD display module directly links by 8 parallel port lines and MCU, two-way motor-drive circuit on the motor drive module is connected with MCU by a triode respectively, and the vehicle speed signal modulate circuit is connected to MCU through trigger HC14.
The utility model is used for the central controller of automotive networking system, and wherein, described MCU adopts the MC68HC908AZ60 single chip computer architecture.Described power management and CAN communication module adopt MC33889 structure chip, are used for providing+5V power supply and the fault-tolerant CAN transceiver of low speed for MCU.Described switch contact scan module adopts MC33993 structure chip, and described switch contact scan module is connected with 22 way switch, in order to detect 22 way switch input signals.Described motor-drive circuit adopts the BTS6143D chip structure.Described LCD display module adopts the OCM4X8C LCD MODULE.
Compared with prior art, the utility model central controller of being used for the automotive networking system has following beneficial effect:
(1) significantly reduces automotive wire bundle, cancel corresponding relay, fuse, purify electromagnetic environment;
(2) switching current is dropped to a milliampere level, the sintering phenomenon of avoiding big electric current directly to cause through switch;
(3) have the automatic protection and the restore funcitons of network diagnostic function and consumer;
(4) Chinese character with failure message shows and prompt facility, is convenient to driver and crew and in time takes measures;
(5) the PWM mode is adopted in the rain brush speed governing, saves the energy;
(6) with other network node co-operation, can realize a series of Based Intelligent Control functions.
Description of drawings
Fig. 1 is the structured flowchart that the utility model is used for the central controller of automotive networking system;
Fig. 2 is the schematic diagram of vehicle speed signal modulate circuit as shown in fig. 1;
Fig. 3 is the central controller main program flow chart that the utility model is used for the automotive networking system;
Be the explanation of Reference numeral in the utility model Figure of description below.
1---MCU (micro controller unit) 2---power management and CAN communication module
3---switch contact scan module 4---motor drive module
5---LCD display module 6---vehicle speed signal modulate circuit
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail.
As shown in Figure 1, the utility model is used for the central controller of automotive networking system, comprises the power management and CAN communication module 2, switch contact scan module 3, vehicle speed signal modulate circuit 6, motor drive module 4 and the LCD display module 5 that are connected with MCU (micro controller unit) 1 respectively; Described MCU adopts the MC68HC908AZ60 single chip computer architecture; Described power management and CAN communication module adopt MC33889 structure chip, are used for providing+5V power supply and the fault-tolerant CAN transceiver of low speed for MCU.Described switch contact scan module adopts MC33993 structure chip, and described switch contact scan module is connected with 22 way switch, in order to detect 22 way switch input signals.Described motor drive module 4 comprises respectively the two-way motor-drive circuit that links with MCU1, and wherein one the tunnel connects washing pump, and another road is connected with rain shaving electrical machine in the PWM mode; Described motor-drive circuit adopts the BTS6143D chip structure; Described LCD display module adopts the OCM4X8C LCD MODULE.Described vehicle speed signal modulate circuit 6 is made of operational amplifier LM224, trigger HCl4 and low speed optocoupler, as shown in Figure 2.
The utility model be used for the automotive networking system each module of central controller annexation as shown in Figure 1, described power management and CAN communication module 2 is by 3 line SPI and MCU1 interface on it; Described switch contact scan module 3 connects with MCU1 by the SPI interface, remaining switching value is by optocoupler and MCU1 interface, LCD display module 5 directly links by 8 parallel port lines and MCU1, two-way motor-drive circuit on the motor drive module 4 connects with MCU1 by a triode respectively, vehicle speed signal modulate circuit 6 is connected to MCU1 through trigger HCl4, therefore, vehicle speed signal can be amplified by operational amplifier LM224, is transported among the MCU1 through optocoupler and trigger HCl4.
Utilize the utility model to be used for the central controller of automotive networking system, the combined switch status information of this automobile can input to MC68HC908AZ60 by MC33993 chip and 14 street lamp photoswitches; By the information of the utility model central controller output meter pilot lamp and the command information of CAN bus; LCD display at the automobile central controller then can demonstrate current up-to-date failure message, turns over the screen key by operation and can also consult historical failure information.
The course of work that the central controller that adopts the utility model to be used for the automotive networking system is controlled is as follows:
As shown in Figure 3, to after the device power, initialization MC68HC908AZ60, then by SPI interface initialization peripheral components MC33889 and MC33993, last initialization LCD display internal register is read FLASH, transfers the failure message sign indicating number; If fault is arranged, then show diagnostic trouble code, if non-fault shows that then all are normal.Enter the infinite loop program, interrupt calculating the speed of a motor vehicle, intermittent scanning switch interface state is judged the light state, and key and rain brush switch and LCD turn over the screen key, call subroutine module separately, and failure message CAN interrupts accepting, and stores FLASH after the judgement into.This shows, in the utility model central controller course of work, the switch contact scan module constantly scans the state of combined switch, by checking the change of state, send corresponding information with the action of controlling other node, show corresponding information (as left and right sides steering indicating light information) to the CAN bus by LED, and directly Wiper motor and preceding washing pump before the control.Receive the failure message that other each node sends from the CAN bus simultaneously, failure message is stored to single-chip microcomputer, on LCDs, show corresponding contents simultaneously.
Describe the effect and the best type selecting of each functional module in the utility model in detail below in conjunction with specific embodiment.
Described MCU (micro controller unit) 1: the main parts in the utility model, the selection of this module plays a key effect for the design of whole hardware circuit.In the vehicle body network control system,, preferably select the single-chip microcomputer of integrated CAN controller, for example: the 08 Series of MCU MC68HC908AZ60 that selects Freescale company to produce for the reliability of simplified design and increase system.This single-chip microcomputer aims at the design of automobile applied environment; powerful; have a general purpose timer and two 8 passages the timer of input capture, output comparison and PWM output function is arranged; 8 AD conversions of 15 passages; the MSCAN08 communication controler; external interrupt control; SCI, SPI expand communication; has inner phaselocked loop; the frequency of outside 32KHz can be risen to the 8.4MHz bus frequency by inner phaselocked loop, the Flash of 60K band defencive function, 2K RAM; 1K E2PROM etc., and 52 general configurable mutual IO ports (totally 64 pins) are provided.Because the AZ60 single-chip microcomputer has the CAN controller module, not only do not need to design the wired circuit between single-chip microcomputer and the CAN controller, and improved reliability, in addition because motor space is comparatively nervous, select such single-chip microcomputer to provide possibility for miniaturization of the present utility model.
Described power management and CAN communication module 2: in the prior art, the power-supply system that automobile uses is the 12V system normally, and the voltage range of accumulator is generally 9～15V.And the maximum input voltage of the input voltage of general single-chip microcomputer and each pin is 5V.Therefore, in central controller, need a power management module to satisfy the conversion of supply voltage.
Described CAN communication module mainly comprises MSCAN08 controller and the CAN bus transceiver among the MC68HC908AZ60.The MSCAN08 controller is the CAN controller that Freescale company aims at its 8 and 16 series monolithic customizations, and this controller is supported CAN2.0B.The CAN network belongs to low speed CAN in this vehicle body network, and the figure place rate is made as 125kbps.
Comprehensive above-mentioned requirements is also considered the saving cost, the power management chip MC33889 that adopts Freescale company to produce in the utility model; Described power management chip MC33889 has following function: operating voltage 9V-27V, can resist the peak voltage of maximum 40V; Two kinds of powering modes are available, under extended mode, and the driving force of minimum 200mA; Four kinds of operator schemes: standard, wait for, stop, sleeping and debugging mode comparatively easily; External switch arousal function (drive current of 150mA is provided); Low-voltage, excess temperature detect and protection, built-in house dog; Interrupt request when having external reset and abnormal conditions; Pass through the communication of SPI mode with MCU, save I/O mouth resource; Its packing forms is SO-28.
Described switch contact scan module: signal sources all in the utility model are all simulated by the external switch amount, therefore, need the interface chip of an external switch amount and inner single-chip microcomputer, make single-chip microcomputer can collect the variation of external signal accurately, rapidly.In order to reduce cost, the MC33993 contact chip monitoring of preferably having selected for use Freescale company to produce, its major function is as follows: the design effort scope is 5.5V-26V; The switching voltage input range is :-14-input voltage; Single Chip Microcomputer (SCM) system direct and 3.3V/5.0V is carried out the SPI communication; The state variation arousal function that can select; Can selection key operating current (16mA or 2mA); 8 programmable switch inputs (energized or ground); INT changes with the variation of on off state.
Described motor drive module: at the motor of rain brush and washing pump, be generally the direct current generator that maximum current is 5-10A, consider the reliability of control, can select the BTS6143D flash switch power chip of Infineon company for use, it has following function: typical drive current 8A; Limiting current 75A; Control output able to programme; Short circuit, overload, excess temperature, overvoltage, lost territory protection; Current detecting.
Described LCD display module: the LCD display module that the utility model adopts is the OCM4X8C LCD MODULE.The OCM4X8C LCD MODULE is the Chinese character image type LCD MODULE of 128*64 dot matrix, can show Chinese character and figure.Provide two kinds of interfaces to connect computer processor: two kinds of connected modes of 8 bit parallels and serial.
Although in conjunction with the accompanying drawings preferred embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under the enlightenment of this real utility model; not breaking away under the scope situation that the utility model aim and claim protect, can also make a lot of forms, these all belong within the protection of the present utility model.
Claims (6)
1. a central controller that is used for the automotive networking system comprises the power management and CAN communication module, motor drive module and the LCD display module that are connected with MCU respectively; It is characterized in that:
Described MCU connects switch contact scan module and vehicle speed signal modulate circuit respectively;
Described motor drive module comprises the two-way motor-drive circuit that links to each other with MCU respectively, and wherein one the tunnel connects washing pump, and another road is connected with rain shaving electrical machine in the PWM mode;
Described vehicle speed signal modulate circuit is made of operational amplifier LM224, trigger HC14 and low speed optocoupler;
Described power management and CAN communication module are by 3 line SPI and MCU interface on it; Described switch contact scan module is connected with MCU by the SPI interface, the LCD display module directly is connected with MCU by 8 parallel port lines, two-way motor-drive circuit on the motor drive module is connected with MCU by a triode respectively, and the vehicle speed signal modulate circuit is connected to MCU through trigger HC14.
2. the central controller that is used for the automotive networking system according to claim 1 is characterized in that, described MCU adopts the MC68HC908AZ60 single chip computer architecture.
3. the central controller that is used for the automotive networking system according to claim 1 is characterized in that, described power management and CAN communication module adopt MC33889 structure chip, are used for providing+5V power supply and the fault-tolerant CAN transceiver of low speed for MCU.
4. the central controller that is used for the automotive networking system according to claim 1, it is characterized in that, described switch contact scan module adopts MC33993 structure chip, and described switch contact scan module is connected with 22 way switch, in order to detect 22 way switch input signals.
5. the central controller that is used for the automotive networking system according to claim 1 is characterized in that, described motor-drive circuit adopts the BTS6143D chip structure.
6. the central controller that is used for the automotive networking system according to claim 1 is characterized in that, described LCD display module adopts the OCM4X8C LCD MODULE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201239177U CN2896342Y (en) | 2005-12-12 | 2005-12-12 | Central controller for automotive network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201239177U CN2896342Y (en) | 2005-12-12 | 2005-12-12 | Central controller for automotive network system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2896342Y true CN2896342Y (en) | 2007-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005201239177U Expired - Fee Related CN2896342Y (en) | 2005-12-12 | 2005-12-12 | Central controller for automotive network system |
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| CN (1) | CN2896342Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211554A (en) * | 2010-04-07 | 2011-10-12 | 南京理工大学 | Touch key control panel |
| CN102520652A (en) * | 2011-12-23 | 2012-06-27 | 埃泰克汽车电子(芜湖)有限公司 | Multifunctional control module for automobile instruments |
| CN103558847A (en) * | 2013-11-13 | 2014-02-05 | 上汽通用五菱汽车股份有限公司 | Simple tester for testing electrical performance of vehicle control unit of new energy automobile and method using same |
| CN107577328A (en) * | 2017-09-21 | 2018-01-12 | 珠海泰芯半导体有限公司 | A kind of electric power controller and method for managing power supply suitable for SVG control chips |
| CN112162997A (en) * | 2020-09-25 | 2021-01-01 | 重庆长安汽车股份有限公司 | Vehicle failure interpretation method and storage medium |
-
2005
- 2005-12-12 CN CNU2005201239177U patent/CN2896342Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211554A (en) * | 2010-04-07 | 2011-10-12 | 南京理工大学 | Touch key control panel |
| CN102520652A (en) * | 2011-12-23 | 2012-06-27 | 埃泰克汽车电子(芜湖)有限公司 | Multifunctional control module for automobile instruments |
| CN103558847A (en) * | 2013-11-13 | 2014-02-05 | 上汽通用五菱汽车股份有限公司 | Simple tester for testing electrical performance of vehicle control unit of new energy automobile and method using same |
| CN107577328A (en) * | 2017-09-21 | 2018-01-12 | 珠海泰芯半导体有限公司 | A kind of electric power controller and method for managing power supply suitable for SVG control chips |
| CN112162997A (en) * | 2020-09-25 | 2021-01-01 | 重庆长安汽车股份有限公司 | Vehicle failure interpretation method and storage medium |
| CN112162997B (en) * | 2020-09-25 | 2024-04-12 | 重庆长安汽车股份有限公司 | Vehicle fault interpretation method and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070502 Termination date: 20100112 |