CN210155547U - Safety control circuit for controller of active electronic brake system - Google Patents
Safety control circuit for controller of active electronic brake system Download PDFInfo
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- CN210155547U CN210155547U CN201920672863.1U CN201920672863U CN210155547U CN 210155547 U CN210155547 U CN 210155547U CN 201920672863 U CN201920672863 U CN 201920672863U CN 210155547 U CN210155547 U CN 210155547U
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Abstract
The utility model provides a safety control circuit for active electronic braking system's controller, include: the main control unit is used for controlling the whole circuit to work; the slave control unit is used for assisting in controlling the whole circuit to work and is electrically connected with the main control unit; the first state detection unit is connected with the master control unit, and the second state detection unit is connected with the slave control unit; and the power management unit is used for controlling the power supply to the whole circuit and is respectively connected with the master control unit, the slave control unit, the first state detection unit and the second state detection unit. The utility model discloses a safety control circuit of controller can each circuit and the state of part among the whole electronic braking system of real time monitoring, when the vehicle breaks down, can in time take safe handling measure, has strengthened automobile electronic braking system's fail safe nature greatly.
Description
Technical Field
The utility model belongs to the technical field of the car and specifically relates to a safety control circuit that is used for active electronic braking system's controller is related to.
Background
With the increasing requirements of people on the safety and comfort of vehicles, the brake safety system is used as an important component of the vehicle safety system, the development is rapid in recent years, and a certain progress is made particularly in the aspect of an electronic brake system; with the rapid development of complex traffic conditions and intelligent driving technologies, the requirements on the safety level and reliability of the electronic brake system are higher and higher, that is, the requirements on the safety level design, the redundancy design, the reliability design and the like of the electronic brake system are higher and higher. The existing electronic brake system is not provided with a safety control circuit, when the electronic brake system is in a crash situation of a main controller in the running process, the electronic brake system generally keeps running in a state before the main controller is crashed, and safety accidents are easily caused.
Therefore, there is a need to design a new safety control circuit for a controller of an active electronic brake system to overcome the above problems.
SUMMERY OF THE UTILITY MODEL
In view of the problems in the prior art, an object of the present invention is to provide a safety control circuit for a controller of an active electronic braking system, which can monitor the states of each circuit and components in the whole electronic braking system in real time, and can take safety measures in time when a vehicle fails, thereby greatly enhancing the safety and reliability of the electronic braking system of a vehicle.
In order to achieve the above object, the present invention provides a safety control circuit for a controller of an active electronic braking system, including: the main control unit is used for controlling the whole circuit to work; the slave control unit is used for assisting in controlling the whole circuit to work and is electrically connected with the master control unit; the first state detection unit is used for detecting first state information of the whole circuit and is electrically connected with the main control unit; the second state detection unit is used for detecting second state information of the whole circuit and is electrically connected with the slave control unit; and the power management unit is used for controlling the power supply to the whole circuit and is electrically connected with the master control unit, the slave control unit, the first state detection unit and the second state detection unit respectively.
Optionally, the safety control circuit further includes a wheel speed sensor and a signal processing unit, the wheel speed sensor is electrically connected to the signal processing unit, and the signal processing unit is electrically connected to the master control unit and the slave control unit, respectively.
Alternatively, the state information includes an output voltage of the power management unit and an input voltage of the wheel speed sensor.
Optionally, the first state detection unit is provided in plurality, and one of the first state detection units is connected between the main control unit and the power management unit.
Optionally, one of the first state detecting units includes a seventeenth capacitor, a fifty-fourth resistor, and a fifty-fifth resistor, a first end of the fifty-fourth resistor is electrically connected to the power output terminal of the power management unit, a second end of the fifty-fourth resistor is electrically connected to the main control unit, and the seventeenth capacitor and the fifty-fifth resistor are further connected in parallel between the second end of the fifty-fourth resistor and a ground line.
As an optional scheme, the safety control circuit further includes a CAN (Controller Area Network) bus transceiver and a storage unit, and the CAN bus transceiver and the storage unit are electrically connected to the main control unit respectively.
As an optional scheme, the CAN bus transceiver includes a first chip and a low-frequency transformer, the first chip includes a first signal transmitting end, a first signal receiving end, a CAN high-level terminal and a CAN low-level terminal, a third resistor is connected between the first signal transmitting end and the main control unit, and a sixth resistor is connected between the first signal receiving end and the main control unit; the low-frequency transformer comprises a first coil and a second coil, the first coil is connected with a second resistor in parallel, the first end of the first coil is electrically connected with the CAN high-level terminal, the second end of the first coil is electrically connected with the first end of a fourth resistor, a third capacitor is connected between the second end of the fourth resistor and the ground wire, a first bidirectional TVS tube and a first capacitor are further connected between the second end of the first coil and the ground wire in parallel, the second end of the first coil is connected with a CAN high-level signal, the second coil is connected with an eighth resistor in parallel, the first end of the second coil is electrically connected with the CAN low-level terminal, the second end of the second coil is electrically connected with the first end of a fifth resistor, the second end of the fifth resistor is electrically connected with the second end of the fourth resistor, a second bidirectional TVS tube and a fourth capacitor are further connected between the second end of the second coil and the ground wire in parallel, and the second end of the second coil is connected with a CAN low-order signal.
As optional scheme, the safety control circuit still includes high limit electrical unit, high limit electrical unit includes first control end, second control end, first power input end, first power output and second power output, first control end with main control unit electric connection, the second control end with from control unit electric connection, first power input end with power management unit's electric energy output electric connection, first power output end and second power output connects one respectively the wheel speed sensor.
Optionally, there are two high-side power units, there are four wheel speed sensors, each high-side power unit is electrically connected to the power output terminal of the power management unit, and each high-side power unit is electrically connected to two wheel speed sensors,
as an optional scheme, at least four second state detection units are provided, a first power output end of each high-side power supply unit is connected to one second state detection unit, and a second power output end of each high-side power supply unit is connected to one second state detection unit.
Compared with the prior art, the utility model discloses a safety control circuit for active electronic braking system's controller sets up main control unit simultaneously and follows the control unit, main control unit detects the state information of whole circuit through first state detecting element, the state information that follows the control unit and detect whole circuit through second state detecting element, be favorable to calibrating the important parameter of vehicle, the state of each circuit and part in the whole electronic braking system of real time monitoring can also, when the vehicle breaks down, can in time take the safety handling measure, automobile electronic braking system's fail safe nature has been strengthened greatly.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Drawings
Fig. 1 is a schematic circuit block diagram of a safety control circuit of the controller according to the present invention;
fig. 2 is a schematic circuit diagram of a part of circuits and a storage unit of a main control unit of the safety control circuit of the controller according to the present invention;
fig. 3 is a schematic circuit diagram of another part of the main control unit of the safety control circuit of the controller according to the present invention;
fig. 4 is a schematic circuit diagram of a slave control unit of the safety control circuit of the controller according to the present invention;
fig. 5 is a schematic circuit diagram of a wheel speed sensor and a signal processing unit of the safety control circuit of the controller according to the present invention;
fig. 6 is a schematic circuit diagram of a first state detection unit and a power management unit of the safety control circuit of the controller according to the present invention;
fig. 7 is a schematic circuit diagram of a CAN bus transceiver of the safety control circuit of the controller according to the present invention;
fig. 8 is a schematic circuit diagram of the high-side power supply unit and the second state detection unit of the safety control circuit of the controller of the present invention.
The respective symbols in the figure are as follows: 1. a main control unit; 2. a slave control unit; 3. a power management unit; 4. a CAN bus transceiver; 5. a wheel speed sensor; 6. a signal processing unit; 7. a second state detection unit; 8. a storage unit; 9. a first state detection unit.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
As shown in fig. 1 to 8, the utility model provides a safety control circuit for controller of active electronic braking system, the safety control circuit of controller includes main control unit 1, slave control unit 2, first state detecting unit 9, second state detecting unit 7 and power management unit 3, wherein, main control unit 1 is used for controlling the whole circuit work, slave control unit 2 is electrically connected with main control unit 1, slave control unit 2 is used for the whole circuit work of auxiliary control; the first state detection unit 9 is electrically connected with the master control unit 1, the second state detection unit 7 is electrically connected with the slave control unit 2, the power management unit 3 is used for controlling to provide electric energy for the whole circuit, and the power management unit 3 is respectively electrically connected with the master control unit 1, the slave control unit 2, the first state detection unit 9 and the second state detection unit 7 to provide electric energy.
When the key switch is turned on, after the vehicle is powered on, the vehicle-mounted power supply (12V or 24V) supplies power to the power management unit 3, the power management unit 3 generates various power supplies required by various circuits and chips (such as the master control unit 1, the slave control unit 2, the first state detection unit 9 and the second state detection unit 7), and the master control unit 1, the slave control unit 2 and other circuits of the system start to be powered on; the master control unit 1 is, for example, a 32-bit chip microcomputer, and the slave control unit 2 is, for example, a 16-bit chip microcomputer, but not limited thereto. After the 32-bit singlechip is powered on, a dog feeding signal WDI is sent to the power management unit 3 through an internal program, the power management unit 3 works normally under the condition that the dog feeding signal WDI is normal, and the power management chip can output a WDO signal to the 32-bit singlechip under the condition that the dog feeding signal WDI is abnormal.
After the electrification is finished, the first state detection unit 9 detects first state information of the whole circuit and transmits the first state information to the main control unit 1, and the main control unit 1 judges whether the active electronic brake system is abnormal or not according to the first state information; the second state detection unit 7 detects second state information of the whole circuit and transmits the second state information to the slave control unit 2, and the slave control unit 2 judges whether the active electronic brake system is abnormal or not according to the second state information. Specifically, the master control unit 1 and the slave control unit 2 are connected by an SPI (Serial peripheral interface) bus, the master control unit 1 performs self-inspection of its internal circuit and related peripheral circuits by the first state detection unit 9 according to an internal program, the slave control unit 2 performs self-inspection of its internal circuit and related peripheral circuits by the second state detection unit 7 according to an internal program, the slave control unit 2 transmits a self-inspection result to the master control unit 1, and the master control unit 1 determines whether to store related information according to the self-inspection result. After the self-checking is finished, the system enters a normal standby or working state, which is similar to the self-checking, and in the standby or working state of the system, the master control unit 1 and the slave control unit 2 respectively monitor the peripheral circuits and loads related to the master control unit 1 and the slave control unit 2 through the first state detection unit 9 and the second state detection unit 7, if one of the master control unit 1 and the slave control unit 2 fails, the other one of the master control unit 1 and the slave control unit 2 learns the failure information and executes corresponding measures according to the failure information, such as turning on a warning lamp, partial failure of a function, complete failure of a function, and the like.
The first state detection unit 9 and the second state detection unit 7 are provided in plurality, and the first state information and the second state information include one or more kinds of information such as an output voltage of the power management unit 3, an input voltage of the wheel speed sensor 5, a voltage and a current of a peripheral circuit of the master control unit 1, a voltage and a current of a peripheral circuit of the slave control unit 2, and the like. One of the first state detecting units 9 is connected between the main control unit 1 and the power management unit 3, and specifically, one of the first state detecting units 9 includes a seventeenth capacitor C17, a fifty-fourth resistor R54 and a fifty-fifth resistor R55, a first end of the fifty-fourth resistor R54 is electrically connected to the power output terminal of the power management unit 3, a second end of the fifty-fourth resistor R54 is electrically connected to the main control unit 1, and a seventeenth capacitor C17 and a fifty-fifth resistor R55 are further connected in parallel between the second end of the fifty-fourth resistor R54 and the ground.
The utility model discloses in, the safety control circuit still includes wheel speed sensor 5, signal processing unit 6, CAN bus transceiver 4 and memory cell 8, wheel speed sensor 5 and 6 electric connection of signal processing unit, signal processing unit 6 respectively with main control unit 1, from 2 electric connection of control unit, CAN bus transceiver 4 and memory cell 8 respectively with main control unit 1 electric connection, memory cell 8 CAN save the information relevant with the self-checking result, main control unit 1 and slave control unit 2's fault information etc., nevertheless not with this for the limit, main control unit CAN also send fault information etc. to the CAN bus network of vehicle on through CAN bus transceiver 4, so that the display instrument of vehicle CAN show, thereby be convenient for remind the driver.
The CAN bus transceiver 4 comprises a first chip U2 and a low-frequency transformer U3, the first chip U2 comprises a first signal transmitting end, a first signal receiving end, a CAN high-level terminal and a CAN low-level terminal, a third resistor R3 is connected between the first signal transmitting end and the main control unit 1, and a sixth resistor R6 is connected between the first signal receiving end and the main control unit 1; the low-frequency transformer U3 comprises a first coil and a second coil, the first coil is connected with a second resistor in parallel, a first end of the first coil is electrically connected with a CAN high-level terminal, a second end of the first coil is electrically connected with a first end of a fourth resistor R4, a third capacitor C3 is connected between a second end of the fourth resistor R4 and the ground wire, a first bidirectional TVS (Transient Voltage Suppressor) tube TVS1 and a first capacitor C1 are further connected between the second end of the first coil and the ground wire in parallel, a second end of the first coil is connected with a CAN high-level signal, the second coil is connected with an eighth resistor R8 in parallel, a first end of the second coil is electrically connected with a CAN low-level terminal, a second end of the second coil is electrically connected with a first end of a fifth resistor R5, a second end of the fifth resistor R5 is electrically connected with a second end of the fourth resistor R4, a second end of the second coil is connected with a second TVS2 and a fourth capacitor C4 in parallel, the second end of the second coil is connected with a CAN low-order signal.
In this embodiment, the safety control circuit further includes a high-side power unit (U9, U10), the high-side power unit includes a first control end, a second control end, a first power input end, a first power output end and a second power output end, the first control end is electrically connected to the master control unit 1, the second control end is electrically connected to the slave control unit 2, the first power input end is electrically connected to the power output end of the power management unit 3, and the first power output end and the second power output end are respectively connected to the wheel speed sensor 5. The high-side power supply units are provided with two, the wheel speed sensors 5 are provided with four, each high-side power supply unit is electrically connected with the electric energy output end of the power management unit 3, each high-side power supply unit is electrically connected with the two wheel speed sensors 5, and when the device is actually applied, each wheel is provided with one wheel speed sensor 5. In addition, the number of the second state detection units 7 is at least four, the first power output end of each high-side power supply unit is connected with one second state detection unit 7, and the second power output end of each high-side power supply unit is connected with one second state detection unit 7, so that the input voltage of the wheel speed sensor 5 can be detected by the second state detection unit 7.
To sum up, the utility model discloses a safety control circuit for active electronic braking system's controller sets up main control unit 1 simultaneously and follows control unit 2, main control unit 1 detects the state information of whole circuit through first state detecting element 9, follow control unit 2 and detect the state information of whole circuit through second state detecting element 7, be favorable to calibrating the important parameter of vehicle, can also real time monitoring the state of each circuit and part in the whole electronic braking system, when the vehicle breaks down, can in time take the safety handling measure, automobile electronic braking system's fail safe nature has been strengthened greatly.
The above detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the scope of the present invention. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the claims appended hereto. The scope of the claims of the present invention should therefore be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is appropriate to the context of the description set forth above.
Claims (10)
1. A safety control circuit for a controller of an active electric brake system, the safety control circuit comprising:
the main control unit is used for controlling the whole circuit to work;
the slave control unit is used for assisting in controlling the whole circuit to work and is electrically connected with the master control unit;
the first state detection unit is used for detecting first state information of the whole circuit and is electrically connected with the main control unit;
the second state detection unit is used for detecting second state information of the whole circuit and is electrically connected with the slave control unit;
and the power management unit is used for controlling the power supply to the whole circuit and is electrically connected with the master control unit, the slave control unit, the first state detection unit and the second state detection unit respectively.
2. A safety control circuit for a controller of an active electronic brake system according to claim 1, further comprising a wheel speed sensor and a signal processing unit, wherein the wheel speed sensor is electrically connected to the signal processing unit, and the signal processing unit is electrically connected to the master control unit and the slave control unit respectively.
3. A safety control circuit for a controller of an active electronic brake system as claimed in claim 2, wherein the state information includes an output voltage of the power management unit and an input voltage of the wheel speed sensor.
4. A safety control circuit for a controller of an active electric brake system according to claim 1, wherein the first state detecting unit is provided in plurality, and one of the first state detecting units is connected between the main control unit and the power management unit.
5. The safety control circuit according to claim 4, wherein one of the first state detection units includes a seventeenth capacitor, a fifty-fourth resistor and a fifty-fifth resistor, a first end of the fifty-fourth resistor is electrically connected to the power output terminal of the power management unit, a second end of the fifty-fourth resistor is electrically connected to the main control unit, and the seventeenth capacitor and the fifty-fifth resistor are further connected in parallel between the second end of the fifty-fourth resistor and a ground line.
6. A safety control circuit for a controller of an active electric brake system according to claim 1, wherein the safety control circuit further comprises a CAN bus transceiver and a memory unit, the CAN bus transceiver and the memory unit being electrically connected to the master control unit, respectively.
7. The safety control circuit of claim 6, wherein the CAN bus transceiver comprises a first chip and a low frequency transformer, the first chip comprises a first signal transmitting end, a first signal receiving end, a CAN high-side terminal and a CAN low-side terminal, a third resistor is connected between the first signal transmitting end and the main control unit, and a sixth resistor is connected between the first signal receiving end and the main control unit; the low-frequency transformer comprises a first coil and a second coil, the first coil is connected with a second resistor in parallel, the first end of the first coil is electrically connected with the CAN high-level terminal, the second end of the first coil is electrically connected with the first end of a fourth resistor, a third capacitor is connected between the second end of the fourth resistor and the ground wire, a first bidirectional TVS tube and a first capacitor are further connected between the second end of the first coil and the ground wire in parallel, the second end of the first coil is connected with a CAN high-level signal, the second coil is connected with an eighth resistor in parallel, the first end of the second coil is electrically connected with the CAN low-level terminal, the second end of the second coil is electrically connected with the first end of a fifth resistor, the second end of the fifth resistor is electrically connected with the second end of the fourth resistor, a second bidirectional TVS tube and a fourth capacitor are further connected between the second end of the second coil and the ground wire in parallel, and the second end of the second coil is connected with a CAN low-order signal.
8. The safety control circuit of claim 2, further comprising a high-side power unit, wherein the high-side power unit comprises a first control terminal, a second control terminal, a first power input terminal, a first power output terminal, and a second power output terminal, the first control terminal is electrically connected to the master control unit, the second control terminal is electrically connected to the slave control unit, the first power input terminal is electrically connected to the power output terminal of the power management unit, and the first power output terminal and the second power output terminal are respectively connected to the wheel speed sensor.
9. A safety control circuit for a controller of an active electronic brake system as claimed in claim 8, wherein said high side power supply unit has two, said wheel speed sensors have four, each of said high side power supply unit is electrically connected to an electric power output of said power management unit, and each of said high side power supply unit is electrically connected to two of said wheel speed sensors.
10. A safety control circuit for a controller of an active electric brake system according to claim 8, wherein there are at least four second state detection units, one second state detection unit is connected to the first power output terminal of each of the high-side power supply units, and one second state detection unit is connected to the second power output terminal of each of the high-side power supply units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920672863.1U CN210155547U (en) | 2019-05-13 | 2019-05-13 | Safety control circuit for controller of active electronic brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920672863.1U CN210155547U (en) | 2019-05-13 | 2019-05-13 | Safety control circuit for controller of active electronic brake system |
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| Publication Number | Publication Date |
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| CN210155547U true CN210155547U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920672863.1U Expired - Fee Related CN210155547U (en) | 2019-05-13 | 2019-05-13 | Safety control circuit for controller of active electronic brake system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110244685A (en) * | 2019-05-13 | 2019-09-17 | 思与行科技(苏州)有限公司 | The safety control circuit of controller for active electronic braking system |
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2019
- 2019-05-13 CN CN201920672863.1U patent/CN210155547U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110244685A (en) * | 2019-05-13 | 2019-09-17 | 思与行科技(苏州)有限公司 | The safety control circuit of controller for active electronic braking system |
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Granted publication date: 20200317 Termination date: 20200513 |
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