CN202193028U - Automotive lighting safety control system based on CAN (controller area network) data transmission - Google Patents
Automotive lighting safety control system based on CAN (controller area network) data transmission Download PDFInfo
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- CN202193028U CN202193028U CN2011202616842U CN201120261684U CN202193028U CN 202193028 U CN202193028 U CN 202193028U CN 2011202616842 U CN2011202616842 U CN 2011202616842U CN 201120261684 U CN201120261684 U CN 201120261684U CN 202193028 U CN202193028 U CN 202193028U
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Abstract
The utility model discloses an automotive lighting safety control system based on CAN (controller area network) data transmission. The control system comprises a main control system, a CAN bus, a wire status detector used for detecting a power supply wire, a node lighting control system connected with the main control system through the CAN bus, and a temperature detector connected with the node lighting control system. The system can detect the abrasion condition of an automotive lighting circuit and the temperature condition of a key part in real time, can detect the status of an automotive lighting element, and prompt and replace a damaged lighting element, thereby reducing potential safety hazard during automotive running and improving automotive lighting safety.
Description
Technical field
The utility model relates to a kind of automotive lighting safety control system based on the CAN data transmission.
Background technology
CAN (ControllerAreaNetwork) data bus is a kind of vehicle local net that is applicable to automotive environment.It belongs to a kind of in the multiplex system, by company of German Bosch (Bosch) early 1980s for solving control units numerous in the modern automobile and a kind of serial communication protocol of the data exchange application and development between the testing tool.Because it has full distributed multi-computer system, multiple communication, transmission reliability height, high safety, no network paralysis, is prone to characteristics such as expansion and easy realization, by the automobile widespread use.The power CAN data transmission system comfortable CAN data transmission systems of unifying is two systems that used of cover.Yet in automotive lighting, the CAN data transmission does not but also have practical application.
The automotive lighting wire harness is more; For standard bands together, and temperature is high, rainwater is many, the automobile heat radiation is difficult, temperature that the engine engine lid is interior is high, makes automotive interior circuit long term wear; In case when running into situation such as leakage of oil, circuit wearing and tearing short circuit, electric leakage or getting spark; Gasoline on the automobile, India rubber tube, plastics instrument desk, plastics foot pad, leather seat, knit fabric etc. can burn on fire, spread soon, often are difficult to put out a fire to save life and property.Sometimes close vehicle all can be ignited, and suffers heavy losses.
Simultaneously, automobile if indicator lamp damages, hidden dangers such as auto against can occur in the process of moving.No matter when turning, is that front or rear steering indicating light damages such as, automobile, all is difficult to show to the automobile driver that closes on turn to requirement; When night running,, also be difficult to show to the automobile driver that closes on if the side-marker lamp damages; In the process of moving, if automobile brake lamp damages, traffic accident such as just be easy to occur knocking into the back.Existing automotive lighting safety control system does not have corresponding emergency handling measure, has only just reusing behind the automobile repair.
Summary of the invention
The purpose of the utility model provides a kind of automotive lighting safety control system based on the CAN data transmission; It can detect the temperature conditions of the wear pattern and the key position of automotive lighting circuit in real time; Can detect the state of automotive lighting element; Illumination component to damaging is pointed out, and substitutes; Reduce automobile hidden danger under steam, improve the safety of automotive lighting.
The described kind automotive lighting safety control system based on the CAN data transmission of the utility model comprises master control unit, CAN bus, is used to detect the lead state detector of power lead, through CAN bus and master control unit bonded assembly node Lighting Control Assembly, and node Lighting Control Assembly bonded assembly thermal detector.
Said master control unit comprises master microprocessor, joystick and button, interface circuit, LCD display and main CAN interface circuit; Joystick is connected with master microprocessor through interface circuit with button, with sending into the master microprocessor analysis after the different location status conversions; Master microprocessor sends order through main CAN interface circuit and the total wire joint of CAN to the node Lighting Control Assembly, and the feedback information of receiving node Lighting Control Assembly; The lead state detector is connected with master microprocessor, is used to detect the data target of power lead, produces the cue that corresponding index departs from; Master microprocessor connects LCD display, and information is presented on the LCD display.
But said node Lighting Control Assembly comprises node microprocessor, driving circuit, illumination component, current detection circuit, node CAN interface circuit external drive and extensive interface; The node microprocessor receives the order of master control unit through node CAN interface circuit and the total wire joint of CAN, and feedback information is sent to master control unit; The node microprocessor is connected with driving circuit; Driving circuit is connected with illumination component, and illumination component is connected with current detection circuit, and current detection circuit is connected with the node microprocessor; Current parameters according to order illumination element detects; Form the feedback information of illumination component state, and, the illumination component that damage is arranged is substituted through the other illumination component of driving circuit drives; But the node microprocessor is connected thermal detector through external drive with extensive interface, is used to detect the temperature of critical component, the feedback information of formation temperature.Extensive interface also can carry out other functions and expand, such as increasing tire pressure monitoring and prompting, door condition monitoring and prompting, windscreen wiper obstruction prompting and protection, anti-theft column lock control, GPRS monitoring and chain control etc.
Further; Said main CAN interface circuit and node CAN interface circuit are formed by CAN controller and CAN transceiver; Master microprocessor, node microprocessor are connected with the CAN controller; The CAN controller is connected with the CAN transceiver, and the total wire joint of CAN transceiver and CAN is used for receiving and sending data message.
Further, said lead state detector is made up of closed loop current sensor, amplifying circuit and acknowledge button circuit; Said closed loop current sensor is connected with the input end of amplifying circuit, and the mouth of amplifying circuit is connected with the master microprocessor of master control unit, acknowledge button circuit one end ground connection, and the other end is connected with the master microprocessor of master control unit.
Further, said driving circuit is the two poles of the earth amplifying circuit D3, D4, is used to drive illumination component; Said current detection circuit is made up of closed loop current sensor and amplifying circuit; Said closed loop current sensor is connected with the input end of amplifying circuit, and the mouth OUT of amplifying circuit is connected with the node microprocessor, through current detecting illumination component state.
Further, said thermal detector is made up of temperature probe, bridge-type resistance and amplifier; Temperature probe is connected with bridge circuit, and bridge circuit is connected with amplifier input terminal, and the mouth of amplifier is connected with the node microprocessor of node Lighting Control Assembly through extensive interface.
Further, for the easier attention that lets abnormal information cause chaufeur of ability, be provided with speech processor and loudspeaker in the said master control unit, said speech processor is connected with loudspeaker with master microprocessor, and the information of will being correlated with is passed through speech play.
Further, said node Lighting Control Assembly has four, is the left front Lighting Control Assembly of automobile, the right front Lighting Control Assembly of automobile, the left back Lighting Control Assembly of automobile, the right back Lighting Control Assembly of automobile, is respectively applied for the state that detects automobile corresponding function position; But the node microprocessor in the right front Lighting Control Assembly of said automobile is connected thermal detector through external drive with extensive interface.
It is following to adopt above system to carry out the method for automotive lighting safety control:
1) interrupt when opening joystick and button, master control unit is gathered the current in wire state in real time, and judges; If the electric current in the lead is excessive, LCD display just controlled by master controller and the loudspeaker cue circuit is unusual;
2) master control unit sends order to the node Lighting Control Assembly in real time and detects the critical component temperature, and the node Lighting Control Assembly is controlled the thermal detector detected temperatures, and gives master control unit with the relevant temperature message feedback; If overtemperature, master controller are just controlled LCD display and loudspeaker prompting temperature anomaly;
3) when joystick and actuation of keys, interface circuit is sent the location status conversion into the master microprocessor analysis, forms command information, and sends to the node microprocessor; After the node microprocessor is received order, drive illumination component on request, detect the illumination component state, and send the parameter that detects back to the node microprocessor; After the node microprocessor analysis, the feedback information that forms the illumination component state is sent back to master microprocessor; If illumination component has damage,, and do following the processing then through LCD display and loudspeaker prompting:
A) be steering indicating light as if what damage, then node microprocessor driven side-marker lamp work substitutes steering indicating light work with the side-marker lamp;
B) be stoplight stop lamp as if what damage, then node microprocessor driven backing-up lamp work substitutes stoplight stop lamp work with backing-up lamp;
C) if that damage is the side-marker lamp, do not occurring turning to when requiring, then node microprocessor driven steering indicating light work substitutes side-marker lamp's work with steering indicating light;
D) be backing-up lamp as if what damage, when not touching on the brake, then node microprocessor driven stoplight stop lamp work substitutes backing-up lamp work with stoplight stop lamp.
The utility model has been accomplished the control to automotive lighting safety with the CAN bus mode, adopts the transmission of data command, has realized minimizing of control of illumination wire harness.Through power lead electric current and the vehicle key parts that are used for automobile lighting system are detected such as the temperature in the engine engine lid in real time, when abnormal condition occurring, point out through LCD display and voice, reduced the spontaneous combustion of automobile; State through to the automotive lighting element detects, and the illumination component that damages is pointed out, and substitute; Reduced automobile hidden danger under steam, the safety that has improved automotive lighting.
Description of drawings
Fig. 1 is the structured flowchart of the utility model.
Fig. 2 is main CAN interface circuit and node CAN interface circuit figure.
Fig. 3 is the circuit diagram of lead state detector.
Fig. 4 is driving circuit figure.
Fig. 5 is current detection circuit figure.
Fig. 6 is the circuit diagram of thermal detector.
Fig. 7 is the main flow chart of the utility model to power lead state and critical component temperature detection.
Fig. 8 is the diagram of circuit that the utility model detects in real time.
Fig. 9 is the diagram of circuit of the utility model master control unit.
Figure 10 is the diagram of circuit of the utility model node Lighting Control Assembly.
The diagram of circuit that Figure 11 substitutes the illumination component that damages for the node microprocessor.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, the automotive lighting safety control system based on the CAN data transmission shown in Figure 6, comprise master control unit 1, CAN bus 2, be connected terminal organ 4 in the CAN bus 2, be used to detect the lead state detector 5 of power lead, through CAN bus and master control unit 1 bonded assembly node Lighting Control Assembly 3, the power lead 7 of supplying power with node Lighting Control Assembly 3 bonded assembly thermal detectors 6, to system and illumination component.
Master control unit 1 comprises master microprocessor 11 (model S3C2410X-SPI), joystick and button 12, interface circuit 13, LCD display 14, speech processor 16, loudspeaker 17 and main CAN interface circuit 15; Joystick is connected with master microprocessor 11 through interface circuit 13 with button 12, analyzes sending into master microprocessor 11 after the different location status conversions; Master microprocessor 11 is connected with CAN bus 2 through main CAN interface circuit 15, sends order to node Lighting Control Assembly 3, and the feedback information of receiving node Lighting Control Assembly 3; Lead state detector 5 is connected with master microprocessor 11, is used to detect the data target of power lead 7, produces the cue that corresponding index departs from; Master microprocessor 11 connects LCD display 14, and the information of will being correlated with is presented on the LCD display; Speech processor 16 is connected with loudspeaker 17 with master microprocessor 11, and the information of will being correlated with is passed through speech play.
Node Lighting Control Assembly 3 has four; Be the left front Lighting Control Assembly of automobile, the right front Lighting Control Assembly of automobile, the left back Lighting Control Assembly of automobile, the right back Lighting Control Assembly of automobile; Be respectively applied for the state that detects automobile corresponding function part, convert feedback information to.They include node microprocessor 31 (but model S3C2410X-SPI), driving circuit 32, illumination component 33, current detection circuit 34, node CAN interface circuit 35 external drive 36 and extensive interface 37; Node microprocessor 31 is connected with CAN bus 2 through node CAN interface circuit 35, receives the order of master control unit 1, and feedback information is sent to master control unit 1; Node microprocessor 31 is connected with driving circuit 32; Driving circuit 32 is connected with illumination component 33, and illumination component 33 is connected with current detection circuit 34, and current detection circuit 34 is connected with node microprocessor 31; Carrying out current parameters by the order of master control unit 1 detects; And pass testing result back node microprocessor 31 and analyze, form the feedback information of illumination component state, and the illumination component that damage is arranged is carried out substituting automatically.But the node microprocessor 31 in the right front Lighting Control Assembly of automobile is connected thermal detector 6 through external drive 36 with extensive interface 37, is used to detect the temperature of critical component, the feedback information of formation temperature.
Main CAN interface circuit 15 is formed by CAN controller MCP2510 and CAN transceiver TJA1050 with node CAN interface circuit 35; Master microprocessor 11, node microprocessor 31 are connected with the CAN controller; The CAN controller is connected with the CAN transceiver; The CAN transceiver is connected with CAN bus 2, is used for receiving and sending data message.
Thermal detector 6 is that RTD PT100, bridge-type resistance and amplifier are formed by temperature probe; Temperature probe is connected with bridge circuit, and bridge circuit is connected with amplifier input terminal, and the output terminals A DOUT of amplifier is connected with the node microprocessor 31 of node Lighting Control Assembly 3 through extensive interface 37.
Like Fig. 7, Fig. 8, Fig. 9, Figure 10, shown in Figure 11, its workflow is following:
System initialization, correlation parameter is set in the CAN initialization, and System self-test is set up the system time allocation sheet, is opened in joystick and the button and have no progeny, the temperature that master control unit 1 is gathered current in wire state and critical component.Lead state detector 5 provides the power data of power lead operation in real time to master control unit 1; In case data target occurring higher is that electric current is excessive, will produce circuit abnormal prompt signal in various degree through LCD display and loudspeaker according to the departure degree of index.As: lead exists wearing and tearing, lead short circuit etc. to occur.Master control unit 1 sends order to node Lighting Control Assembly 3 in real time and detects the critical component temperature; Node Lighting Control Assembly 3 control thermal detectors 6 detected temperatures; Thermal detector 6 detects the temperature in critical component such as the engine engine lid in real time; In case note abnormalities is overtemperature; Then import in the master control unit 1, and produce the temperature anomaly informations, let chaufeur attract great attention and take corresponding measure etc. through LCD display 14 and loudspeaker 17 through node Lighting Control Assembly 3, CAN bus 2.
Driver's operation joystick and button 12 actions; Convert location status to electric signal such as emergent, turning etc. through interface circuit 13 and send into master microprocessor 11 analyses; Formation meets the data format of J1939 standard; These data form the data link layer structure through main CAN interface circuit 15, send information through the Physical layer that meets the ISO11898 standard to each node Lighting Control Assembly; (this comes outside transmission information with regard to the control that the arbitrary equipment that allows on bus has equal chance to obtain bus to the communication pattern of employing time-division multiplex technology.If have the more than two devices desire to send information at synchronization, data collision will take place, the CAN bus can detect these conflict situations in real time and make corresponding arbitration and can not destroy information to be passed); After node microprocessor 31 is received order, drive illumination component 33 on request, detect the illumination component state, and the current parameters of the reflection illumination component state that will detect is sent node microprocessor 31 back to; After node microprocessor 31 is analyzed, form feedback information and send back to master microprocessor 11; If illumination component 33 has damage, then through LCD display 14 and loudspeaker 17 promptings; 31 pairs of corresponding elements that damage of node microprocessor substitute simultaneously:
If what damage is steering indicating light, then node microprocessor driven side-marker lamp work substitutes steering indicating light work with the side-marker lamp;
If what damage is stoplight stop lamp, then node microprocessor driven backing-up lamp work substitutes stoplight stop lamp work with backing-up lamp;
If that damage is the side-marker lamp, do not occurring turning to when requiring, then node microprocessor driven steering indicating light work substitutes side-marker lamp's work with steering indicating light;
If what damage is backing-up lamp, when not touching on the brake, then node microprocessor driven stoplight stop lamp work substitutes backing-up lamp work with stoplight stop lamp.
Such as, the automobile turn lamp, left front damages, and then can on LCD display, show " damage of left front steering indicating light " printed words and pass through the loudspeaker broadcast; Simultaneously, the node microprocessor is analyzed through the logical AND preceence, and the side-marker lamp who employs the automobile left front certainly replaces steering indicating light work.
Claims (7)
1. automotive lighting safety control system based on the CAN data transmission is characterized in that: comprise master control unit (1), CAN bus (2), be used to detect the lead state detector (5) of power lead, through CAN bus and master control unit bonded assembly node Lighting Control Assembly (3), and node Lighting Control Assembly bonded assembly thermal detector (6);
Said master control unit (1) comprises master microprocessor (11), joystick and button (12), interface circuit (13), read-out and main CAN interface circuit (15); Joystick is connected with master microprocessor through interface circuit with button, with sending into the master microprocessor analysis after the different location status conversions; Master microprocessor sends order through main CAN interface circuit and the total wire joint of CAN to the node Lighting Control Assembly, and the feedback information of receiving node Lighting Control Assembly; Lead state detector (5) is connected with master microprocessor, is used to detect the data target of power lead, produces the cue that corresponding index departs from; Master microprocessor connects read-out, and information is presented on the read-out;
Said node Lighting Control Assembly (3) comprises node microprocessor (31), driving circuit (32), illumination component (33), current detection circuit (34), node CAN interface circuit (35) but external drive (36) and extensive interface (37); The node microprocessor receives the order of master control unit through node CAN interface circuit and the total wire joint of CAN, and feedback information is sent to master control unit; The node microprocessor is connected with driving circuit; Driving circuit is connected with illumination component, and illumination component is connected with current detection circuit, and current detection circuit is connected with the node microprocessor; Current parameters according to order illumination element detects; Form the feedback information of illumination component state, and, the illumination component that damage is arranged is substituted through the other illumination component of driving circuit drives; But the node microprocessor is connected thermal detector (6) through external drive with extensive interface, be used to detect the temperature of critical component, the feedback information of formation temperature.
2. the automotive lighting safety control system based on the CAN data transmission according to claim 1; It is characterized in that: said main CAN interface circuit (15) and node CAN interface circuit (35) are formed by CAN controller and CAN transceiver; Master microprocessor (11), node microprocessor (31) are connected with the CAN controller; The CAN controller is connected with the CAN transceiver, and the CAN transceiver is connected with CAN bus (2), is used for receiving and sending data message.
3. the automotive lighting safety control system based on the CAN data transmission according to claim 2 is characterized in that: said lead state detector (5) is made up of closed loop current sensor, amplifying circuit and acknowledge button circuit; Said closed loop current sensor is connected with the input end of amplifying circuit, and the mouth of amplifying circuit is connected with the master microprocessor of master control unit (11), acknowledge button circuit one end ground connection, and the other end is connected with the master microprocessor of master control unit.
4. the automotive lighting safety control system based on the CAN data transmission according to claim 3 is characterized in that: said driving circuit (32) is the two poles of the earth amplifying circuit (D3, D4), is used to drive illumination component (33); Said current detection circuit (34) is made up of closed loop current sensor and amplifying circuit; Said closed loop current sensor is connected with the input end of amplifying circuit, and the mouth OUT of amplifying circuit is connected with node microprocessor (31), through current detecting illumination component state.
5. the automotive lighting safety control system based on the CAN data transmission according to claim 4 is characterized in that: said thermal detector (6) is made up of temperature probe, bridge-type resistance and amplifier; Temperature probe is connected with bridge circuit, and bridge circuit is connected with amplifier input terminal, and the mouth of amplifier is connected with the node microprocessor (31) of node Lighting Control Assembly (3) through extensive interface (37).
6. according to claim 1,2,3,4 or 5 described automotive lighting safety control systems based on the CAN data transmission; It is characterized in that: be provided with speech processor (16) and loudspeaker (17) in the said master control unit (1); Said speech processor is connected with loudspeaker with master microprocessor, and the information of will being correlated with is passed through speech play.
7. the automotive lighting safety control system based on the CAN data transmission according to claim 6; It is characterized in that: said node Lighting Control Assembly (3) has four; Be the left front Lighting Control Assembly of automobile, the right front Lighting Control Assembly of automobile, the left back Lighting Control Assembly of automobile, the right back Lighting Control Assembly of automobile, be respectively applied for the state that detects automobile corresponding function position; But the node microprocessor in the right front Lighting Control Assembly of said automobile is connected thermal detector (6) through external drive (36) with extensive interface (37).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202616842U CN202193028U (en) | 2011-07-22 | 2011-07-22 | Automotive lighting safety control system based on CAN (controller area network) data transmission |
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| CN2011202616842U CN202193028U (en) | 2011-07-22 | 2011-07-22 | Automotive lighting safety control system based on CAN (controller area network) data transmission |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381238A (en) * | 2011-07-22 | 2012-03-21 | 海南华福汽车零部件制造有限公司 | Automobile illumination safety control system and control method based on controller area network (CAN) data transmission |
| CN102874189A (en) * | 2012-10-17 | 2013-01-16 | 厦门金龙联合汽车工业有限公司 | Coach chassis harness protection and alarm device and method thereof |
| CN106535416A (en) * | 2016-12-23 | 2017-03-22 | 鹿为柱 | Interior and exterior light control system |
| CN107097716A (en) * | 2017-03-23 | 2017-08-29 | 南宁学院 | Car bulb failure alternative |
-
2011
- 2011-07-22 CN CN2011202616842U patent/CN202193028U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381238A (en) * | 2011-07-22 | 2012-03-21 | 海南华福汽车零部件制造有限公司 | Automobile illumination safety control system and control method based on controller area network (CAN) data transmission |
| CN102874189A (en) * | 2012-10-17 | 2013-01-16 | 厦门金龙联合汽车工业有限公司 | Coach chassis harness protection and alarm device and method thereof |
| CN106535416A (en) * | 2016-12-23 | 2017-03-22 | 鹿为柱 | Interior and exterior light control system |
| CN107097716A (en) * | 2017-03-23 | 2017-08-29 | 南宁学院 | Car bulb failure alternative |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20160722 |