CN110244685A - The safety control circuit of controller for active electronic braking system - Google Patents
The safety control circuit of controller for active electronic braking system Download PDFInfo
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- CN110244685A CN110244685A CN201910392113.3A CN201910392113A CN110244685A CN 110244685 A CN110244685 A CN 110244685A CN 201910392113 A CN201910392113 A CN 201910392113A CN 110244685 A CN110244685 A CN 110244685A
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- 238000001514 detection method Methods 0.000 claims abstract description 60
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The present invention provides a kind of safety control circuit of controller for active electronic braking system, comprising: for controlling the main control unit of entire circuit work；For assisting controlling the slave control unit of entire circuit work, it is electrically connected from control unit and main control unit；For detecting the first state detection unit and the second state detection unit of the first state information of entire circuit, first state detection unit is connect with main control unit, and the second state detection unit is connect with from control unit；The Power Management Unit of electric energy is provided to entire circuit for controlling, Power Management Unit is connect with main control unit, from control unit, first state detection unit, the second state detection unit respectively.The safety control circuit of controller of the invention can monitor the state of each circuit and component in entire electric brake system in real time, when vehicle breaks down, can take safe handling measure in time, greatly strengthen the security reliability of automotive electronics braking system.
Description
Technical field
The present invention relates to automotive fields, more particularly, to a kind of safety of controller for active electronic braking system
Control circuit.
Background technique
As people increasingly improve the safety of vehicle and the requirement of comfort, brake safe system is as vehicle safety
The important component of system develops more rapidly in recent years, especially makes some progress in terms of electric brake system；
With the fast development of complicated traffic condition and intelligent driving technology, to the security level and reliability of electric brake system
The requirement of aspect is also higher and higher, namely security level design, Redundancy Design and reliability design etc. to electric brake system
The requirement of aspect is higher and higher.Existing electric brake system is not provided with safety control circuit, when electric brake system is being transported
When occurring master controller in capable process and crash situation occur, state operation before generally keeping master controller to crash is easy
Lead to the generation of safety accident.
Therefore, it is necessary to which the safety control circuit for designing a kind of new controller for active electronic braking system is gone
Overcome the above problem.
Summary of the invention
In view of the problems of the prior art, the purpose of the present invention is to provide a kind of for active electronic braking system
The safety control circuit of controller can monitor the state of each circuit and component in entire electric brake system in real time, work as vehicle
When breaking down, safe handling measure can be taken in time, greatly strengthens the security reliability of automotive electronics braking system.
In order to achieve the above object, the present invention proposes a kind of safety control of controller for active electronic braking system
Circuit processed, comprising: for controlling the main control unit of entire circuit work；For assist control entire circuit work from control
Unit, it is described to be electrically connected from control unit and the main control unit；For detecting the first state information of entire circuit
First state detection unit, the first state detection unit and the main control unit are electrically connected；For detecting entire electricity
Second state detection unit of second status information on road, second state detection unit electrically connect with described from control unit
It connects；For control to entire circuit provide electric energy Power Management Unit, the Power Management Unit respectively with the main control
Unit, it is described from control unit, the first state detection unit, second state detection unit be electrically connected.
Alternatively, the safety control circuit further includes wheel speed sensors and signal processing unit, the wheel
Fast sensor and the signal processing unit are electrically connected, the signal processing unit respectively with the main control unit, described
It is electrically connected from control unit.
Alternatively, the status information include the Power Management Unit output voltage and the wheel speed
The input voltage of sensor.
Alternatively, the first state detection unit is equipped with multiple, one of them described first state detection
Unit is connected between the main control unit and the Power Management Unit.
Alternatively, one of them described first state detection unit includes the 17th capacitor, the 54th electricity
Resistance and the 55th resistance, the electric energy output end of the first end and the Power Management Unit of the 54th resistance electrically connect
It connects, the second end of the 54th resistance and the main control unit are electrically connected, the second end of the 54th resistance
The 17th capacitor and the 55th resistance are also connected in parallel between ground wire.
Alternatively, the safety control circuit further includes CAN (Controller Area Network, device processed
Local area network) bus transceiver and storage unit, the CAN bus transceiver and the storage unit respectively with the main control
Unit is electrically connected.
Alternatively, the CAN bus transceiver includes the first chip and low-frequency transformer, first chip
Including the first signal sending end, the first signal receiving end, CAN high position terminals and CAN low level terminals, first signal
Be connected with 3rd resistor between transmitting terminal and the main control unit, first signal receiving end and the main control unit it
Between be connected with the 6th resistance；The low-frequency transformer includes first coil and the second coil, the first coil and second resistance
It is connected in parallel, the first end of the first coil and the CAN high position terminals are electrically connected, the second end of the first coil
It is electrically connected with the first end of the 4th resistance, connects third capacitor between the second end and ground wire of the 4th resistance, described the
Also it is connected in parallel to the first two-way TVS pipe and first capacitor between the second end and ground wire of one coil, the of the first coil
Two terminate into CAN high signal, and second coil is connect with the 8th resistor coupled in parallel, the first end of second coil with it is described
CAN low level terminals are electrically connected, and the second end of second coil and the first end of the 5th resistance are electrically connected, and the described 5th
The second end of resistance and the second end of the 4th resistance are electrically connected, between the second end and ground wire of second coil also simultaneously
Connection is connected with the second two-way TVS pipe and the 4th capacitor, and the second end of second coil accesses CAN low level signal.
Alternatively, the safety control circuit further includes flash power supply unit, the flash power supply unit packet
The first control terminal, the second control terminal, the first power input, the first power output end and second source output end are included, it is described
First control terminal and the main control unit are electrically connected, and second control terminal is electrically connected with described from control unit, institute
The electric energy output end for stating the first power input and the Power Management Unit is electrically connected, first power output end and
The second source output end is separately connected the wheel speed sensors.
Alternatively, there are two the flash power supply unit tools, there are four the wheel speed sensors tools, each
The flash power supply unit is electrically connected with the electric energy output end of the Power Management Unit respectively, each described flash power supply
Unit is electrically connected with two wheel speed sensors respectively,
Alternatively, second state detection unit is at least provided with four, each described flash power supply list
First power output end of member connects second state detection unit, the second electricity of each flash power supply unit
Source output terminal connects second state detection unit.
Compared with prior art, the safety control circuit of the controller for active electronic braking system of the invention is same
When setting main control unit with from control unit, main control unit detects the state of entire circuit by first state detection unit
Information detects the status information of entire circuit from control unit by the second state detection unit, is conducive to the important ginseng of vehicle
Number is calibrated, and can also monitor the state of each circuit and component in entire electric brake system in real time, when event occurs for vehicle
When barrier, safe handling measure can be taken in time, greatly strengthens the security reliability of automotive electronics braking system.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Detailed description of the invention
Fig. 1 is the schematic block circuit diagram of the safety control circuit of the controller of the invention；
Fig. 2 is a portion circuit of the main control unit of the safety control circuit of the controller of the invention and deposits
The circuit diagram of storage unit；
Fig. 3 is wherein another part circuit of the main control unit of the safety control circuit of the controller of the invention
Circuit diagram；
Fig. 4 is the circuit diagram of the slave control unit of the safety control circuit of the controller of the invention；
Fig. 5 is the wheel speed sensors of the safety control circuit of the controller of the invention and the circuit of signal processing unit
Schematic diagram；
Fig. 6 is the first state detection unit and Power Management Unit of the safety control circuit of the controller of the invention
Circuit diagram；
Fig. 7 is the circuit diagram of the CAN bus transceiver of the safety control circuit of the controller of the invention；
Fig. 8 is the flash power supply unit and the second state detection unit of the safety control circuit of the controller of the invention
Circuit diagram.
It is respectively marked in figure as follows: 1, main control unit；2, from control unit；3, Power Management Unit；4, CAN bus is received and dispatched
Device；5, wheel speed sensors；6, signal processing unit；7, the second state detection unit；8, storage unit；9, first state detection is single
Member.
Specific embodiment
To make to have further understanding to the purpose of the present invention, construction, feature and its function, hereby cooperate embodiment specifically
It is bright as follows.
As shown in Figures 1 to 8, the present invention provides a kind of security control of controller for active electronic braking system
Circuit, the safety control circuit of controller include main control unit 1, from control unit 2, first state detection unit 9, the second shape
State detection unit 7 and Power Management Unit 3, wherein main control unit 1 for controlling the work of entire circuit, from control unit 2 with
Main control unit 1 is electrically connected, and controls entire circuit work from control unit 2 for assisting；First state detection unit 9 and master
Control unit 1 is electrically connected, and the second state detection unit 7 is electrically connected with from control unit 2, and Power Management Unit 3 is for controlling
It makes and provides electric energy to entire circuit, Power Management Unit 3 is detected with main control unit 1, from control unit 2, first state respectively
Unit 9, the second state detection unit 7 are electrically connected to provide electric energy.
In use, vehicle power supply (12V or 24V) gives Power Management Unit 3 to power after opening key switch vehicle powers on,
Power Management Unit 3 generate each circuit and chip (such as main control unit 1, from control unit 2, first state detection unit 9,
Second state detection unit 7) required for various power supplys, main control unit 1 with since control unit 2 and system other circuits
It powers on；Wherein, main control unit 1 be, for example, 32 single-chip microcontrollers, from control unit 2 be, for example, 16 single-chip microcontrollers, but not as
Limit.32 single-chip microcontrollers send feeding-dog signal WDI to Power Management Unit 3, power management list by internal processes first after powering on
Member 3 works normally in the normal situation of feeding-dog signal WDI, in the abnormal situation of feeding-dog signal WDI, power management chip meeting
WDO signal is exported to 32 single-chip microcontrollers.
After the completion of powering on, first state detection unit 9 detects the first state information of entire circuit and by first shape
State information is sent to main control unit 1, and main control unit 1 judges that the active electronic is braked according to the first state information
Whether system has exception；Second state detection unit 7 detects the second status information of entire circuit and believes second state
Breath is sent to from control unit 2, judges the active electronic braking system from control unit 2 according to second status information
Whether exception is had.Specifically, main control unit 1 and between control unit 2 pass through SPI (Serial Peripheral
Interface, Serial Peripheral Interface (SPI)) bus connection, main control unit 1 detects single according to internal program and by first state
First 9 pairs of internal circuits and relevant peripheral circuit carry out self-test, according to internal program and pass through second from control unit 2
State detection unit 7 carries out self-test to internal circuit and relevant peripheral circuit, sends self-detection result from control unit 2
To main control unit 1, main control unit 1 decides whether to store relevant information according to self-detection result.After self-test, it is
System enters normal standby or working condition, similar with self-test, under system standby or working condition, main control unit 1 and from
Control unit 2 to each autocorrelative peripheral circuit and is born by first state detection unit 9, the second state detection unit 7 respectively
Load is monitored, if main control unit 1 and one of failure from control unit 2, another can learn fault message
And corresponding counter-measure is executed according to fault message, such as unlatching emergency warning lamp, funtion part fail, function is entirely ineffective etc..
In addition, first state detection unit 9 and the second state detection unit 7 be respectively equipped with it is multiple, first state information and
Second status information respectively includes the input electricity that status information includes the output voltage of Power Management Unit 3, wheel speed sensors 5
Pressure, main control unit 1 peripheral circuit voltage and current, from information such as the voltage and currents of peripheral circuit of control unit 2
One of or it is a variety of.One of first state detection unit 9 is connected between main control unit 1 and Power Management Unit 3,
Specifically, one of first state detection unit 9 includes the 17th capacitor C17, the 54th resistance R54 and the 55th
The first end of resistance R55, the 54th resistance R54 and the electric energy output end of Power Management Unit 3 are electrically connected, the 54th electricity
The second end and main control unit 1 for hindering R54 are electrically connected, also in parallel between the second end and ground wire of the 54th resistance R54 to connect
It is connected to the 17th capacitor C17 and the 55th resistance R55.
In the present invention, safety control circuit further includes wheel speed sensors 5, signal processing unit 6, CAN bus transceiver 4
With storage unit 8, wheel speed sensors 5 and signal processing unit 6 are electrically connected, signal processing unit 6 respectively with main control unit
1, it is electrically connected from control unit 2, CAN bus transceiver 4 and storage unit 8 are electrically connected with main control unit 1 respectively, storage
Unit 8 can store information relevant to self-detection result, main control unit 1 and from fault message of control unit 2 etc., but not with
This is limited, and fault message etc. can also be sent on the CAN bus network of vehicle by main control unit by CAN bus transceiver 4,
In order to which the display instrument of vehicle can be shown, consequently facilitating reminding driver.
CAN bus transceiver 4 includes that the first chip U2 and low-frequency transformer U3, the first chip U2 are sent including the first signal
End, the first signal receiving end, CAN high position terminals and CAN low level terminals, the first signal sending end and main control unit 1
Between be connected with 3rd resistor R3, the 6th resistance R6 is connected between the first signal receiving end and main control unit 1；Low frequency varying potential
Device U3 includes first coil and the second coil, and first coil is connected in parallel with second resistance, the first end and CAN high of first coil
Position terminals are electrically connected, and the first end of the second end of first coil and the 4th resistance R4 are electrically connected, and the of the 4th resistance R4
Third capacitor C3 is connected between two ends and ground wire, and it is two-way to be also connected in parallel to first between the second end and ground wire of first coil
TVS (Transient Voltage Suppressor, Transient Suppression Diode) pipe TVS1 and first capacitor C1, first coil
Second end accesses CAN high signal, and the second coil is connected in parallel with the 8th resistance R8, the first end and CAN low level of the second coil
Terminals are electrically connected, and the first end of the second end of the second coil and the 5th resistance R5 are electrically connected, and the second of the 5th resistance R5
End and the second end of the 4th resistance R4 are electrically connected, and it is two-way to be also connected in parallel to second between the second end and ground wire of the second coil
The second end of TVS pipe TVS2 and the 4th capacitor C4, the second coil access CAN low level signal.
In the present embodiment, safety control circuit further includes flash power supply unit (U9, U10), and flash power supply unit includes
First control terminal, the second control terminal, the first power input, the first power output end and second source output end, the first control
End processed and main control unit 1 are electrically connected, and the second control terminal is electrically connected with from control unit 2, the first power input and electricity
The electric energy output end of source control unit 3 is electrically connected, and the first power output end and second source output end are separately connected one
Wheel speed sensors 5.Flash power supply unit tool there are two, wheel speed sensors 5 tool there are four, each flash power supply unit respectively with
The electric energy output end of Power Management Unit 3 is electrically connected, each flash power supply unit is electrical with two wheel speed sensors 5 respectively
Connection, in practical application, the wheel speed sensors 5 are arranged in each wheel.In addition, the second state detection unit 7 to
There are four setting less, the first power output end of each flash power supply unit connects second state detection unit 7, each
The second source output end of flash power supply unit connects second state detection unit 7, is examined to realize using the second state
Survey the input voltage that unit 7 detects wheel speed sensors 5.
In conclusion the safety control circuit of the controller for active electronic braking system of the invention is arranged simultaneously
For main control unit 1 with from control unit 2, main control unit 1 detects the state letter of entire circuit by first state detection unit 9
Breath is detected the status information of entire circuit by the second state detection unit 7 from control unit 2, is conducive to the important ginseng of vehicle
Number is calibrated, and can also monitor the state of each circuit and component in entire electric brake system in real time, when event occurs for vehicle
When barrier, safe handling measure can be taken in time, greatly strengthens the security reliability of automotive electronics braking system.
By the above detailed description of preferred embodiments, it is intended to more clearly describe feature and spirit of the invention,
And not protection scope of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its purpose
It is intended to cover various changes and has being arranged in the scope of protection of the claims of the invention to be applied of equality.Cause
This, scope of protection of the claims of the invention should illustrate the most wide explanation of work according to above-mentioned, to cause it to cover institute
Possible change and the arrangement of tool equality.
Claims (10)
1. a kind of safety control circuit of the controller for active electronic braking system, which is characterized in that the controller
Safety control circuit include:
For controlling the main control unit of entire circuit work；
It is described electrically to connect from control unit and the main control unit for assisting controlling the slave control unit of entire circuit work
It connects；
For detecting the first state detection unit of the first state information of entire circuit, the first state detection unit and institute
State main control unit electric connection；
For detecting the second state detection unit of the second status information of entire circuit, second state detection unit and institute
It states and is electrically connected from control unit；
For control to entire circuit provide electric energy Power Management Unit, the Power Management Unit respectively with the main control
Unit, it is described from control unit, the first state detection unit, second state detection unit be electrically connected.
2. the safety control circuit for the controller of active electronic braking system, feature exist as described in claim 1
In, the safety control circuit further include wheel speed sensors and signal processing unit, at the wheel speed sensors and the signal
Manage unit be electrically connected, the signal processing unit respectively with the main control unit, it is described from control unit be electrically connected.
3. the safety control circuit for the controller of active electronic braking system, feature exist as claimed in claim 2
In the status information includes the output voltage of the Power Management Unit and the input voltage of the wheel speed sensors.
4. the safety control circuit for the controller of active electronic braking system, feature exist as described in claim 1
It is equipped in, the first state detection unit multiple, one of them described first state detection unit is connected to the main control
Between unit and the Power Management Unit.
5. the safety control circuit for the controller of active electronic braking system, feature exist as claimed in claim 4
In one of them described first state detection unit includes the 17th capacitor, the 54th resistance and the 55th resistance, described
The first end of 54th resistance and the electric energy output end of the Power Management Unit are electrically connected, the 54th resistance
Second end and the main control unit are electrically connected, and are also connected in parallel between the second end and ground wire of the 54th resistance
17th capacitor and the 55th resistance.
6. the safety control circuit for the controller of active electronic braking system, feature exist as described in claim 1
In, the safety control circuit further include CAN bus transceiver and storage unit, the CAN bus transceiver and the storage
Unit is electrically connected with the main control unit respectively.
7. the safety control circuit for the controller of active electronic braking system, feature exist as claimed in claim 6
In, the CAN bus transceiver include the first chip and low-frequency transformer, first chip include the first signal sending end,
First signal receiving end, CAN high position terminals and CAN low level terminals, first signal sending end and the main control
It is connected with 3rd resistor between unit, is connected with the 6th resistance between first signal receiving end and the main control unit；
The low-frequency transformer includes first coil and the second coil, and the first coil is connected in parallel with second resistance, and described first
The first end of coil and the CAN high position terminals are electrically connected, and the first of the second end of the first coil and the 4th resistance
End be electrically connected, between the second end and ground wire of the 4th resistance connect third capacitor, the second end of the first coil with
The first two-way TVS pipe and first capacitor, the second end access CAN high position letter of the first coil are also connected in parallel between ground wire
Number, second coil is connect with the 8th resistor coupled in parallel, and the first end of second coil and the CAN low level terminals are electrical
Connection, the second end of second coil and the first end of the 5th resistance are electrically connected, the second end of the 5th resistance and institute
The second end for stating the 4th resistance is electrically connected, and it is two-way to be also connected in parallel to second between the second end and ground wire of second coil
The second end of TVS pipe and the 4th capacitor, second coil accesses CAN low level signal.
8. the safety control circuit for the controller of active electronic braking system, feature exist as claimed in claim 2
In the safety control circuit further includes flash power supply unit, and the flash power supply unit includes the first control terminal, the second control
End, the first power input, the first power output end and second source output end, first control terminal and the main control
Unit be electrically connected, second control terminal and it is described from control unit be electrically connected, first power input with it is described
The electric energy output end of Power Management Unit is electrically connected, first power output end and second source output end difference
Connect the wheel speed sensors.
9. the safety control circuit for the controller of active electronic braking system, feature exist as claimed in claim 8
In there are two the flash power supply unit tools, and there are four the wheel speed sensors tools, each described flash power supply unit difference
Be electrically connected with the electric energy output end of the Power Management Unit, each described flash power supply unit respectively with two wheels
Fast sensor is electrically connected.
10. the safety control circuit for the controller of active electronic braking system, feature exist as claimed in claim 8
In at least provided with four, the first power output end of each flash power supply unit connects second state detection unit
Second state detection unit is connect, the second source output end of each flash power supply unit connects described in one
Second state detection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910392113.3A CN110244685A (en) | 2019-05-13 | 2019-05-13 | The safety control circuit of controller for active electronic braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910392113.3A CN110244685A (en) | 2019-05-13 | 2019-05-13 | The safety control circuit of controller for active electronic braking system |
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| Publication Number | Publication Date |
|---|---|
| CN110244685A true CN110244685A (en) | 2019-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910392113.3A Pending CN110244685A (en) | 2019-05-13 | 2019-05-13 | The safety control circuit of controller for active electronic braking system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111884896A (en) * | 2020-07-15 | 2020-11-03 | 杜杰 | Digital safety chain system based on communication bus and monitoring method thereof |
| CN113311774A (en) * | 2021-06-09 | 2021-08-27 | 中国第一汽车股份有限公司 | Drive control method and system |
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| CN210155547U (en) * | 2019-05-13 | 2020-03-17 | 思与行科技(苏州)有限公司 | Safety control circuit for controller of active electronic brake system |
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