CN102248913A - Vehicle light controller, detection method and vehicle-mounted network system - Google Patents
Vehicle light controller, detection method and vehicle-mounted network system Download PDFInfo
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- CN102248913A CN102248913A CN2011101185162A CN201110118516A CN102248913A CN 102248913 A CN102248913 A CN 102248913A CN 2011101185162 A CN2011101185162 A CN 2011101185162A CN 201110118516 A CN201110118516 A CN 201110118516A CN 102248913 A CN102248913 A CN 102248913A
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Abstract
The invention discloses a vehicle light controller, a detection method and a vehicle-mounted network system. The vehicle light controller comprises a voltage switching circuit, a microcontroller and an intelligent power switch, wherein the voltage switching circuit is connected to the microcontroller which is connected to the intelligent power switch. The vehicle light controller disclosed by the invention can detect the connection state of vehicle light circuits, and avoid the condition that the light state display is different from actual situations.
Description
Technical field
The present invention relates to automobile lamp control technology field, particularly a kind of judgement of car light line out of service, the car light mode of operation reads and automobile lamp is controlled Lighting Controller and method of inspection and vehicle netbios.
Background technology
The mode of car light is on the existing automobile: control by light combined switch and relay, the light combined switch is connected in series to the light current control loop of relay, the forceful electric power output that closure and conducting by switch comes control relay, thus realize the control of car light.The state that shows passing light if desired, then the on-off signal with the corresponding switch gear of passing light passes to car body controller, and car body controller passes to combination instrument with the state of passing light again and shows.In this case, if the lead from light combined switch dipped beam shelves to the dipped beam relay lost efficacy, and it is normal from light combined switch dipped beam shelves to the lead of car body controller, when the light combined switch is got to the dipped beam shelves, car body controller can collect the signal of dipped beam gear switch closure, car body controller sends to combination instrument with this signal, can show the bright information of passing light on the combination instrument, but because light combined switch dipped beam shelves are to the lead inefficacy of dipped beam relay, the control signal of dipped beam relay loses transmission path, thereby the adhesive of uncontrollable dipped beam relay also just can not be controlled the light on and off of passing light.This just causes the demonstration of light and actual conditions not to be inconsistent, and causes people can not in time find the problem that exists in the light control simultaneously again.
This shows that above-mentioned existing Lighting Controller obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.Because the defective that exists in the above-mentioned prior art, the inventor is actively studied innovation, in the hope of founding a kind of Lighting Controller of new structure, makes it have more practicality.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of Lighting Controller, can inspection vehicle lamp driver coupled condition, avoided the light state to show situation about not being inconsistent with actual conditions.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
Lighting Controller comprises voltage conversion circuit, microcontroller and smart power switch, and wherein voltage conversion circuit connects microcontroller, and microcontroller connects smart power switch.
Further, described microcontroller is micro controller system 78F9234, and smart power switch is analog line driver BTS724G, and micro controller system 78F9234 connects two analog line driver BTS724G.
Further, the control end of two passages of the diagnosis pin multiplexing of described analog line driver BTS724G and corresponding mouth parallel connection are used for driving a bus lamp.
Further, also comprise the LIN bus interface, described LIN bus interface is connected with microcontroller.
Another object of the present invention is for providing a kind of vehicle netbios, and this system can accurately obtain the correct status of car light, has avoided the existing condition of car light and has shown situation about not being inconsistent.
The technical scheme that realizes above-mentioned purpose is as follows:
Vehicle netbios comprises vehicle-mounted computer and LIN bus, also comprises above-mentioned arbitrary described Lighting Controller, and the microcontroller of described Lighting Controller is connected with the LIN bus communication.
Vehicle netbios comprises vehicle-mounted computer and LIN bus, it is characterized in that, also comprises the arbitrary described Lighting Controller of claim 1 to 5, and the microcontroller of described Lighting Controller is connected with the LIN bus communication.
The present invention also provides a kind of above-mentioned car light control detection method, and this method can detect the existing condition of car light, has avoided the existing condition and the inconsistent problem of show state of car light.The technical scheme that realizes this purpose is as follows:
A kind of car light control detection method, give the smart power switch chip controls pin and the certain hour of delaying time by the microcontroller output low level, detect the corresponding diagnosis pin of smart power switch chip then,, then can judge load open circuit if smart power switch chip diagnosis pin is a low level; If smart power switch chip diagnosis pin is not a low level; Then give the smart power switch chip controls pin and the certain hour of delaying time by microcontroller output high level, detect the corresponding diagnosis pin of smart power switch chip then, if the diagnosis pin is a high level, it is normal then can to judge load; If the diagnosis pin is a square wave, then can judge load short circuits.
The present invention supports the detection of the loading condition of four passages, and method of inspection is all realized by above step.
Compared with prior art, beneficial effect of the present invention is:
Lighting Controller of the present invention is in the process that detects load open circuit, it is low level that micro controller system is given the control level of smart power chip, this moment, smart power chip did not have forceful electric power output, and car light is work not, promptly can detect the car light load open circuit under the out-of-run situation of car light.Can detect the existing condition of car light, avoid the existing condition and the inconsistent problem of show state of car light.The smart power switch that adopted replaces traditional relay control, and it is little to have a volume, convenient characteristics of installing.
Description of drawings
Fig. 1 is the structured flowchart of Lighting Controller of the present invention;
Fig. 2 is the schematic diagram of preferred embodiment of the forceful electric power connector of Lighting Controller of the present invention;
Fig. 3 is the schematic diagram of the preferred embodiment of the light current of Lighting Controller of the present invention and bus connector;
Fig. 4 is the schematic diagram of preferred embodiment of the voltage conversion circuit of Lighting Controller of the present invention;
Fig. 5 is the schematic diagram of the preferred embodiment of the microcontroller minimum system of Lighting Controller of the present invention and debug i/f circuit;
Fig. 6 is LIN bus interface and a peripheral circuit schematic diagram thereof in the Lighting Controller of the present invention;
Fig. 7 is the schematic diagram of the preferred embodiment of the smart power switch of Lighting Controller of the present invention and peripheral circuit thereof;
Fig. 8 is the schematic diagram of preferred embodiment of the load connector of Lighting Controller of the present invention;
Fig. 9 is the diagram of circuit of car light control detection method of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail, but not as a limitation of the invention.
Fig. 1 is the structured flowchart of Lighting Controller of the present invention.As shown in Figure 1, Lighting Controller comprises voltage conversion circuit, microcontroller and smart power switch, and wherein voltage conversion circuit connects microcontroller, and microcontroller connects two smart power switch.For the ease of the installation of Lighting Controller of the present invention be connected, the connector of power supply and load etc. is provided, Lighting Controller of the present invention is connected with power supply, load and vehicle bus fast with inserting mode.Wherein connector comprises: with smart power switch bonded assembly load connector, be used for being connected fast with the car light load; With smart power switch bonded assembly forceful electric power connector, be used for power supply pin power supply to smart power switch; With microcontroller and voltage conversion circuit bonded assembly light current and bus connector, realize to the microcontroller power supply, and the communication that realizes microcontroller and In-vehicle networking.
A kind of preferred as present embodiment, Fig. 5 is the schematic diagram of the preferred embodiment of the microcontroller minimum system of Lighting Controller of the present invention and debug i/f circuit; Fig. 6 is LIN bus interface and a peripheral circuit schematic diagram thereof in the Lighting Controller of the present invention; Fig. 7 is the schematic diagram of the preferred embodiment of the smart power switch of Lighting Controller of the present invention and peripheral circuit thereof.To shown in Figure 7, microcontroller adopts the 78F9234 of auspicious Sa as Fig. 5, and 78F9234 in-to-in Asynchronous Serial Interface is supported the LIN bus communication.BTS724G is the smart power switch device that Infineon releases.Load can be resistive load, inductive load or capacitive load, is applicable to the load of band high surge current.The inner integrated four-way power switch of BTS724G can provide the drive current of 7.3A, drives the car light load with two BTS724G.The control end and the corresponding mouth parallel connection of two passages of the diagnosis pin multiplexing among the BTS724G are used for driving a street lamp, a slice BTS724G can drive two street lamps like this, a slice BTS724G has four signal line to link to each other with microcontroller, comprises two control lines and two diagnostics lines.So just can drive four lamps by two BTS724G, the drive current that can provide is 14.6A.
Fig. 2 is the schematic diagram of preferred embodiment of the forceful electric power connector of Lighting Controller of the present invention.As shown in Figure 2,3,4 pin of forceful electric power connector P2 link to each other with the positive pole of the 12V direct current forceful electric power of outside input, and 1,2 pin of forceful electric power connector P2 links to each other with the ground wire of the 12V direct current forceful electric power of outside input; The power supply pin Vbb power supply of giving the smart power switch shown in Fig. 7 behind the 12V direct current forceful electric power process wire fuse F.
Fig. 3 is the schematic diagram of the preferred embodiment of the light current of Lighting Controller of the present invention and bus connector; 2 pin of light current and bus connector P3 and 1 pin link to each other with ground wire with the positive pole of the 12V light current of outside input respectively, 3 pin of light current and bus connector P3 link to each other with the 6th pin of the LIN bus interface TJA1020 shown in Fig. 6, thereby realize the communication of vehicle netbios and Lighting Controller.
Fig. 4 is the schematic diagram of preferred embodiment of the voltage conversion circuit of Lighting Controller of the present invention.As shown in Figure 4, voltage conversion circuit is by capacitor C 7, C8, and C9, C10, diode D7, D8 and voltage transitions chip LT11215 form.Be used for the 12V voltage of outside input is changeed 5V voltage.The input D12V of voltage conversion circuit links to each other with 2 pin of light current shown in Fig. 3 and bus connector P3, that is is connected with the positive pole of the 12V light current of outside input.The output Vcc of voltage conversion circuit is micro controller system shown in Fig. 5 and peripheral circuit power supply.
Fig. 5 is the schematic diagram of the preferred embodiment of the microcontroller minimum system of Lighting Controller of the present invention and debug i/f circuit.As shown in Figure 5, microcontroller minimum system and debug i/f circuit are by 16 pin connector P1, as the micro controller system 78F9234 of microcontroller and by resistance R 1, R2, R3, R4, R5, R6, R7, R8; Capacitor C 2, C3, C4, C5; Magnetic bead B2, B3; Light-emitting diode D1, the peripheral circuit that D2 constitutes is formed.Wherein light-emitting diode D1 is as micro controller system power supply voltage DVCC indication, and light-emitting diode D2 links to each other with 17 pin of micro controller system 78F9234, as the indicator lamp of debugging SCM program.16 pin connectors are used for linking to each other with micro controller system 78F9234 debugging acid Minicube2.The pin P03 of micro controller system 78F9234 links to each other with IN2 with the control pin IN1 of the first smart power switch U4 shown in Fig. 7, the pin P02 of micro controller system 78F9234 links to each other with IN4 with the control pin IN3 of the first smart power switch U4 shown in Fig. 7, the pin P01 of micro controller system 78F9234 links to each other with IN2 with the control pin IN1 of the second smart power switch U5 shown in Fig. 7, and the pin P00 of micro controller system 78F9234 links to each other with IN2 with the control pin IN1 of the second smart power switch U5 shown in Fig. 7.The pin P20 of micro controller system 78F9234 links to each other with the state pin ST1/2 of the first smart power switch U4 shown in Fig. 7, the pin P21 of micro controller system 78F9234 links to each other with the state pin ST3/4 of the first smart power switch U4 shown in Fig. 7, the pin P22 of micro controller system 78F9234 links to each other with the state pin ST1/2 of the second smart power switch U5 shown in Fig. 7, and the pin P23 of micro controller system 78F9234 links to each other with the state pin ST3/4 of the second smart power switch U5 shown in Fig. 7.Realize thus first smart power switch and the control of second smart power switch and obtaining of state.
Fig. 6 is the schematic diagram of LIN bus interface and peripheral circuit thereof in the Lighting Controller of the present invention.The LIN bus interface adopts transceiver TJA1020.The 6th pin of transceiver TJA1020 links to each other with the 3rd pin of light current shown in Fig. 3 and bus connector P3, is used for realizing the transmission of transceiver TJA1020 and vehicle-mounted bus signals.The 1st pin of transceiver TJA1020 links to each other with the 18th pin with the 19th pin of the micro controller system 78F9234 shown in Fig. 5 respectively with the 4th pin, to realize the communication of micro controller system and TJA1020.The vehicle netbios that has the LIN bus can be by the communication of TJA1020 and peripheral circuit realization and micro controller system, to obtain the status information of car light.
Fig. 7 is the smart power switch and the peripheral circuit schematic diagram thereof of Lighting Controller of the present invention.As shown in Figure 7, Lighting Controller of the present invention adopts two smart power switch: the first smart power switch U4 and the second smart power switch U5.The first smart power switch U4 and the second smart power switch U5 all adopt chip BTS724G.Chip BTS724G is the smart power switch device that Infineon releases.Load can be resistive load, inductive load or capacitive load, is applicable to the load of band high surge current.The inner integrated four-way power switch of chip BTS724G can provide the drive current of 7.3A, drives head light with two BTS724G.The control end and the corresponding mouth parallel connection of two passages of the diagnosis pin multiplexing among the BTS724G are used for driving a street lamp, a slice chip BTS724G can drive two street lamps like this, a slice chip BTS724G has four signal line to link to each other with microcontroller, comprises two control lines and two diagnostics lines.So just can drive four lamps by two chip BTS724G, the drive current that can provide is 14.6A.Peripheral circuit is by resistance R 9, resistance R 10, resistance R 11, resistance R 12, and diode D3, diode D4, diode D5, diode D6 form.Describe in detail above being connected of the first smart power switch U4 and the second smart power switch U5 and micro controller system, as follows with the connection description of load: 17 of the first smart power chip U4,18 pins link to each other with the 1st pin of the load connector P4 shown in Fig. 8,13,14 pins of the first smart power chip U4 link to each other with the 3rd pin of the load connector P4 shown in Fig. 8; 17 pins of the second smart power chip U5 link to each other with the 5th pin of 18 pins with the load connector P4 shown in Fig. 8, the 7th pin of load connector P4 among 13 pins of the second smart power chip U5 and 14 pins and Fig. 8 links to each other, and drives four bus lamp loads by load connector P4.
Fig. 8 is the schematic diagram of the load connector of Lighting Controller of the present invention.As shown in Figure 8, the load connector is used to connect the car light load, by capacitor C 12, and capacitor C 13, capacitor C 14, capacitor C 15, and connector P4 forms.The load connector partly described in detail at smart power switch with being connected of smart power switch, and outside four bus lamp loads can be realized and being connected of Lighting Controller of the present invention by load connector shown in Figure 8.
Following table 1 is the test result of smart power switch chip BTS724G.IN3 and IN4 are the control pin of two passages among the chip BTS724G, these two channel multiplexing diagnosis pin ST3/4.Respectively IN3 and the cooresponding mouth of IN4 are opened a way simultaneously, press the control signal control BTS724G of IN3 in the table 1 and IN4, measure the pin level of ST3/4 simultaneously.With IN3 and the short circuit simultaneously of the cooresponding mouth of IN4, can obtain the situation that ST3/4 changes with the different of IN4 control signal along with IN3.IN3 and the cooresponding mouth of IN4 are connect the car light load of passing through test and energy normal operation simultaneously, can obtain the situation that ST3/4 changes with the different of IN4 control signal along with IN3.Even the control pin and the output pin of a passage are in parallel the uses for IN3 and IN4 in Lighting Controller.
Table 1
L is a low level in the table, and H is a high level, and level standard is: 5 volts of TTL (transistor-transistor logic level).
Can be obtained by table 1, after IN3 and IN4 and mouth parallel connection thereof, when being low level, when having only load open circuit, the output of diagnosis pin just be low level at control pin, so with this condition of opening a way as diagnostic load.If load is not opened a way, at control pin output high level, if load short circuits is then diagnosed pin output square wave, the cycle of square wave is 5 milliseconds; If load is normal, then diagnose pin output high level.Explanation is when control pin output high level in the data of chip BTS724G, if load short circuits, then the square-wave signal in the output of diagnosis pin has 2 milliseconds time-delay with respect to control signal.For this reason, when diagnosis is normal and short circuited, behind control pin output high level, need 2 milliseconds of time-delays, could detect the state of diagnosis pin, can circle collection the pin level of diagnosis pin, if level be a height, then counting variable is added one, as long as the time of circle collection just can be finished diagnosis greater than 5ms, after finishing the level of circle collection diagnosis pin,, show that then the diagnosis pin is output as high level if count value is identical with the on-cycle number of times or very approaching; If count value and on-cycle number of times differ more, show that then the diagnosis pin is output as square wave.
Microcontroller is by detecting the outgoing level of BTS724G diagnosis pin, can judge the circuit on-off situation of corresponding car light and the mode of operation of car light, by the expansion bus function, the state and the diagnostic result of car light can be sent to In-vehicle networking, thereby realize detection car light state and car light circuit on-off situation.
The fitting process of Lighting Controller of the present invention is as follows:
Prepare two after tested can normal operation the car light load, according to above-mentioned test method smart power switch is tested, to verify that can it normal operation, when giving the control pin output low level of smart power switch by microcontroller, only when the load of this passage was in the state that opens circuit, the diagnosis pin of this passage is output low level.Load is high level or low level regardless of what export to control pin just often, and its diagnosis pin is all exported high level.In the time of load short circuits, the diagnosis pin of smart power switch output square wave.
Keep supplying forceful electric power by voltage conversion circuit to controller, whether the output of test voltage change-over circuit is 5 volts, otherwise checking circuit is normal up to its output.
Can the control program of micro controller system 78F9234 be rewritten by 16 pin connector P1 as debugging interface shown in Figure 5, can viewing lamp according to the work that is provided with in the program, otherwise check microcontroller minimum system hardware circuit and program, up to working properly.
Keep supplying forceful electric power to controller, connect the car light load, can see the mode of operation of car light by indicator lamp by load connector shown in Figure 8.
Vehicle netbios comprises vehicle-mounted computer, LIN bus and above-mentioned Lighting Controller, and the microcontroller of described Lighting Controller is connected with the LIN bus communication.Microcontroller and LIN bus interface direct connection shown in Figure 6 in the present embodiment, and LIN bus interface shown in Figure 6 is connected with the LIN bus communication of vehicle netbios.Thereby realized the communication of the vehicle-mounted computer of Lighting Controller and existing vehicle netbios.And the quick connection and the dismounting and change of Lighting Controller have been reached.Certainly, also can be connected with microcontroller by adding light current shown in Figure 3 and bus connector, light current and bus connector connect the LIN bus interface again.
Car light control detection method of the present invention depends on above-mentioned Lighting Controller and realizes, can be under the situation of not lighting car light, and the break-make of inspection vehicle lamp driver, thus can get rid of car light road open fault.And the coupled condition of car light circuit and the mode of operation of car light can be reflected on the vehicle-mounted display terminal by vehicle-mounted bus.
Fig. 9 is the diagram of circuit of car light control detection method of the present invention.As shown in Figure 9, car light control detection method of the present invention comprises the steps:
A. will to measure variable, loop control variable and diagnostic result initialization of variable be 0 to microcontroller;
B. microcontroller output control signal CTL1 as shown in Figure 7 by P03 pin output low level, and delays time 2 milliseconds;
C. the cycle detection diagnosis pin level of ST1 as shown in Figure 7, if ST1 is a high level then cnt1 adds, otherwise cnt1 remains unchanged, the number of times of cycle detection is 50, detects number of times less than 50, execution in step c then, otherwise execution in step d;
If d. cnt1 is less than 5, show that the level that detects diagnosis pin ST1 is a low level, then with the cnt1 zero clearing, and be 0 with the cooresponding output load open circuit that OUT1 was connect of expression control signal CTL1 as shown in Figure 7 with diagnostic result variables D iag_Result assignment; If cnt1 is greater than 5, execution in step e then;
E. export high level by the P03 pin, and delay time 2 milliseconds;
F. the cycle detection diagnosis pin level of ST1 as shown in Figure 7, if ST1 is a high level then cnt2 adds, the number of times of cycle detection is 200, detects number of times less than 200, execution in step f then, otherwise execution in step g;
If g. cnt2 is greater than 195, show that the level that detects diagnosis pin ST1 is a high level, then be 2 normal with the cooresponding output load that OUT1 was connect of expression control signal CTL1 as shown in Figure 7 with diagnostic result storage of variables Diag_Result assignment; Otherwise, show that the level that detects diagnosis pin ST1 is a square wave, with diagnostic result storage of variables Diag_Result assignment is 1 with the cooresponding output load short circuits that OUT1 was connect of as shown in Figure 7 control signal CTL1 of expression, and the pairing control signal CTL1 of control single chip computer P03 pin output low level;
H. with the cnt2 zero clearing;
I. function returns the value of Diag_Result.
Above step is supported the detection of the loading condition of four passages by the detection scheme of passage 1 corresponding load, the present invention, and the method for inspection of other three passages is identical with passage 1.Parameter setting in the above-mentioned step is a kind of embodiment wherein, and not exclusive and absolute, can set according to actual conditions.As delay time, detection number of times or the like.
Above embodiment is an exemplary embodiment of the present invention only, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (7)
1. Lighting Controller is characterized in that, comprises voltage conversion circuit, microcontroller and smart power switch, and wherein voltage conversion circuit connects microcontroller, and microcontroller connects smart power switch.
2. Lighting Controller according to claim 1 is characterized in that, also comprises connector, and wherein smart power switch connects load connector and forceful electric power connector, and microcontroller and voltage conversion circuit are connected to light current and bus connector.
3. Lighting Controller according to claim 1 is characterized in that, described microcontroller is micro controller system 78F9234, and smart power switch is analog line driver BTS724G, and micro controller system 78F9234 connects two analog line driver BTS724G.
4. Lighting Controller according to claim 3 is characterized in that: the control end of two passages of the diagnosis pin multiplexing of described analog line driver BTS724G and corresponding mouth parallel connection are used for driving a bus lamp.
5. Lighting Controller according to claim 1 is characterized in that, also comprises the LIN bus interface, and described LIN bus interface is connected with microcontroller.
6. vehicle netbios comprises vehicle-mounted computer and LIN bus, it is characterized in that, also comprises the arbitrary described Lighting Controller of claim 1 to 5, and the microcontroller of described Lighting Controller is connected with the LIN bus communication.
7. car light control detection method, it is characterized in that, give the smart power switch chip controls pin and the certain hour of delaying time by the microcontroller output low level, detect the corresponding diagnosis pin of smart power switch chip then, if smart power switch chip diagnosis pin is a low level, then can judge load open circuit; If smart power switch chip diagnosis pin is not a low level; Then give the smart power switch chip controls pin and the certain hour of delaying time by microcontroller output high level, detect the corresponding diagnosis pin of smart power switch chip then, if the diagnosis pin is a high level, it is normal then can to judge load; If the diagnosis pin is a square wave, then can judge load short circuits.
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| CN2011101185162A CN102248913A (en) | 2011-05-09 | 2011-05-09 | Vehicle light controller, detection method and vehicle-mounted network system |
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| CN2011101185162A CN102248913A (en) | 2011-05-09 | 2011-05-09 | Vehicle light controller, detection method and vehicle-mounted network system |
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| CN104483956A (en) * | 2014-10-28 | 2015-04-01 | 北京汽车股份有限公司 | Automobile controller performance detection method and device |
| CN105216649A (en) * | 2015-11-03 | 2016-01-06 | 成都雅骏新能源汽车科技股份有限公司 | A kind of novel entire car controller being applicable to pure electric automobile |
| CN109459682A (en) * | 2018-12-07 | 2019-03-12 | 深圳巴斯巴科技发展有限公司 | A kind of Auto-Test System for AC charging floor lamp Opital control board |
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| CN109459682A (en) * | 2018-12-07 | 2019-03-12 | 深圳巴斯巴科技发展有限公司 | A kind of Auto-Test System for AC charging floor lamp Opital control board |
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Application publication date: 20111123 |