CN208855618U - Abs controller - Google Patents
Abs controller Download PDFInfo
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- CN208855618U CN208855618U CN201821274822.9U CN201821274822U CN208855618U CN 208855618 U CN208855618 U CN 208855618U CN 201821274822 U CN201821274822 U CN 201821274822U CN 208855618 U CN208855618 U CN 208855618U
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Abstract
A kind of abs controller, including power circuit, multiple wheel speed signal conditioning circuits, driving circuit for electromagnetic valve, CAN interface, indicating fault circuit for lamp, main MCU and from MCU.The output end of power circuit is electrically connected with the power input of main MCU, from the power input of the power input of MCU, the power input of multiple wheel speed signal processing circuits, the power input of driving circuit for electromagnetic valve and indicating fault circuit for lamp respectively；The output end of multiple wheel speed signal conditioning circuits is electrically connected with the input terminal of main MCU respectively；The input terminal of driving circuit for electromagnetic valve is electrically connected with the control output end of main MCU, for controlling the opening and closing of solenoid valve；CAN interface and main MCU are communicated to connect；It communicates to connect from MCU and main MCU, and is electrically connected from the control output end of MCU with the input terminal of indicating fault circuit for lamp.The utility model hardware cost is low, high reliablity.
Description
Technical field
The utility model relates to Car ABS Technolgies.
Background technique
Anti-lock braking system in automobiles (Anti-lock Braking System, ABS) can be effectively prevented vehicle and make
It is in the presence of that wheel lock up is protected so that steering failure and whipping etc. are dangerous caused by avoiding because of wheel lock up during dynamic
Demonstrate,prove the safety arrestment of vehicle.Anti-lock braking system in automobiles is mainly by wheel speed sensors, abs controller and brake-pressure controller
Composition.By taking the ABS system of four-way as an example, four-way ABS system detects four wheels using four wheel speed sensors respectively
Wheel speed signal, abs controller receive wheel speed signal and input and certain algorithm is used to be calculated, and will calculate resulting control and refer to
Order is exported respectively to four pressure regulating solenoid valves of brake-pressure controller, with control brake pressure to prevent wheel lock up.
In anti-lock braking system in automobiles, abs controller is control core and the ABS system exploitation of whole system
Key point in the process.Current abs controller generallys use single MCU structure, and MCU is in addition to braking anti-lock control to be completed
Outside the function of system, it is also responsible for the task to system hardware and software monitoring, has higher want to the arithmetic speed of MCU, interface resource
It asks；And due to there was only a piece of MCU, reliability is not high.
Summary of the invention
Low, high reliablity ABS control that the technical problem to be solved by the utility model is to provide a kind of hardware costs
Device.
In order to solve the above technical problems, technical solution adopted in the utility model is:
A kind of abs controller, including power circuit, multiple wheel speed signal conditioning circuits, driving circuit for electromagnetic valve, CAN are total
Line interface, indicating fault circuit for lamp, main MCU and from MCU；The output end of power circuit respectively with the power input of main MCU,
From the power input of MCU, the power input of multiple wheel speed signal processing circuits, driving circuit for electromagnetic valve power input
Be electrically connected with the power input of indicating fault circuit for lamp, power circuit be used to convert external input voltage for main MCU, from
Operating voltage needed for MCU, multiple wheel speed signal processing circuits, driving circuit for electromagnetic valve and indicating fault circuit for lamp；Multiple wheels
The output end of fast signal conditioning circuit is electrically connected with the input terminal of main MCU respectively, and each wheel speed signal conditioning circuit will be for that will receive
Output is to main MCU after the wheel speed signal for the speed probe output arrived carries out signal condition；The input terminal of driving circuit for electromagnetic valve
It is electrically connected with the control output end of main MCU, for controlling the opening and closing of solenoid valve；CAN interface and main MCU communication link
It connects, CAN interface with CAN bus for connecting, to realize the data communication between main MCU and control unit of engine；From
MCU and main MCU is communicated to connect, and is electrically connected from the control output end of MCU with the input terminal of indicating fault circuit for lamp.
Above-mentioned abs controller, wherein wheel speed signal conditioning circuit includes voltage follower circuit, low-pass filter circuit, letter
Number amplifying circuit, shaping circuit and optical coupling isolation circuit；Voltage follower circuit, low-pass filter circuit, signal amplification circuit, shaping
Circuit and optical coupling isolation circuit are sequentially connected, and the output end of optical coupling isolation circuit is electrically connected with the input terminal of main MCU.
Above-mentioned abs controller, wherein including Dolby circuit, Dolby circuit includes LC filter circuit and company parallel with one another
Two decoupling capacitors connect；LC filter circuit includes filter inductance and filter capacitor, one end of filter inductance and power circuit
Output end electrical connection, the other end of filter inductance are electrically connected with one end of filter capacitor, the other end ground connection of filter capacitor；Two
One end of decoupling capacitor is electrically connected with the power input of one end of filter capacitor and main MCU respectively, two decoupling capacitors
Other end ground connection.
The utility model has at least the following advantages and feature:
1, two MCU have been used according to the abs controller of an embodiment of the present invention, has been realized by main MCU and wheel speed is believed
Number acquisition, generate the control instruction to the solenoid valve of the brake-pressure controller of ABS system, and receiving main MCU from MCU
Meeting driving malfunction indicator light is lighted when the fault message of transmission, and driver and passenger is reminded to exclude the failure of ABS system generation as early as possible, from
And control consequence wrong caused by avoiding because of the system failure.Main MCU can use the MCU of better performances, and can adopt from MCU
With the weaker MCU of performance, be conducive to save hardware cost in this way, and obtain more stable, reliable error protection；
2, defeated in the power supply of the output end and main MCU of power circuit according to the abs controller of an embodiment of the present invention
Enter and be equipped with Dolby circuit between end, can remove high-frequency noise, reduce the High-frequency Interference of system, in wheel speed signal conditioning circuit,
Voltage follower circuit is used before low-pass filtering, better low-pass filter effect is obtained, to improve the steady of product
Qualitative and reliability.
Detailed description of the invention
Fig. 1 shows the functional block diagram of the abs controller according to an embodiment of the present invention.
Fig. 2 shows the circuit diagrams according to the Dolby circuit of an embodiment of the present invention.
Fig. 3 shows the circuit diagram of the wheel speed signal conditioning circuit according to an embodiment of the present invention.
Fig. 4 shows the circuit diagram of the indicating fault circuit for lamp according to an embodiment of the present invention.
Fig. 5 shows the circuit diagram of the driving circuit for electromagnetic valve according to an embodiment of the present invention.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Fig. 1 shows the functional block diagram of the abs controller according to an embodiment of the present invention.Referring to Fig. 1, according to this
The abs controller of one embodiment of utility model includes power circuit 1, multiple wheel speed signal conditioning circuits 2, driving circuit for electromagnetic valve
3, CAN interface 4, indicating fault circuit for lamp 5, main MCU61 and from MCU62.
The output end of power circuit 1 respectively with the power input of main MCU61, the power input from MCU62, multiple wheels
The electricity of the power input of fast signal processing circuit 2, the power input of driving circuit for electromagnetic valve 3 and indicating fault circuit for lamp 5
Source input terminal electrical connection, for converting external input voltage for main MCU61, from MCU52, multiple wheel speed signal processing circuits
2, operating voltage needed for driving circuit for electromagnetic valve 3 and indicating fault circuit for lamp 5.In the present embodiment, power circuit 1 is used to incite somebody to action
The 24V DC voltage of automobile storage battery output is converted to 5V DC voltage, with to main MCU61, from MCU52, multiple wheel speed signals
Processing circuit 2, driving circuit for electromagnetic valve 3 and indicating fault circuit for lamp 5 are powered.
Since power supply working environment is severe on automobile, not only regulation of line voltage is big, but also is contaminated with a large amount of interference signals
And spike.If power quality is poor, the normal work of electronic component can be significantly affected, even results in the malfunction of controller
Make.For this purpose, in a kind of preferable embodiment, it can be between the output end of power circuit 1 and the power input of main MCU61
One Dolby circuit is set.The circuit diagram of the Dolby circuit is as shown in Figure 2.Dolby circuit include LC filter circuit and mutually simultaneously
Join two decoupling capacitors of connection.LC filter circuit includes filter inductance L1 and filter capacitor C1, one end of filter inductance L1 with
The output end of power circuit 1 is electrically connected, and the other end of filter inductance L1 is electrically connected with one end of filter capacitor C1, filter capacitor C1
The other end ground connection.One end of two decoupling capacitors C2 and C3 power supply with one end of filter capacitor C1 and main MCU61 respectively
Input terminal electrical connection, the other end ground connection of two decoupling capacitors C2 and C3.LC filter circuit can overcome the fluctuation of power supply to MCU
Normal work causes undesirable influence, and decoupling capacitor C2 and C3 can remove high-frequency noise, reduces the High-frequency Interference of system, improves system
The Electro Magnetic Compatibility of system.
The output end of multiple wheel speed signal conditioning circuits 2 is electrically connected with the input terminal of main MCU61 respectively, each wheel speed signal tune
Output is to main MCU61 after the wheel speed signal for the speed probe output that reason circuit 2 is used to receive carries out signal condition.
Please refer to Fig. 3.In the present embodiment, wheel speed signal conditioning circuit 2 includes voltage follower circuit 21, low-pass filtering electricity
Road 22, signal amplification circuit 23, shaping circuit 24 and optical coupling isolation circuit 25；Voltage follower circuit 21, low-pass filter circuit 22,
Signal amplification circuit 23, shaping circuit 24 and optical coupling isolation circuit 25 are sequentially connected, the output end of optical coupling isolation circuit 25 and master
The input terminal of MCU61 is electrically connected.
Voltage follower circuit 21 is mainly made of operational amplifier U1.22 major calculations amplifier U2 of low-pass filter circuit,
Capacitor C4, capacitor C5, resistance R1, resistance R2, resistance R9 and resistance R10 composition.Signal amplification circuit 23 is mainly by operation amplifier
Device U3, resistance R3, resistance R4, resistance R4 and resistance R5 composition.The model of operational amplifier U1, U2 and U3 can be used
LM224AD.Shaping circuit 24 is made of Schmidt trigger, and 74LS14D can be used in model.The model of optical coupling isolation circuit 25 can
Using TLP521-1GR.
Not only size is identical for the input voltage of voltage follower circuit 21 and output voltage, but also phase is identical.Voltage follow
The main function of circuit is the input resistance of increasing circuit, and voltage follower circuit is added before low-pass filtering, be can be enhanced low
The effect of pass filter.Wheel speed signal passes through low-pass filter circuit 22, can filter off the clutter in signal.Low-pass filter circuit setting
One cutoff frequency, the signal lower than the cutoff frequency can pass through, and the signal higher than the cutoff frequency is attenuated, low-pass filtering
Circuit filters out noise under the premise of retaining useful wheel speed signal as far as possible.Wheel speed signal after low-pass filtering passes through
Signal amplification circuit 23 amplifies faint wheel speed signal, and the square-wave signal of standard is then shaped to by shaping circuit 24.
Before wheel speed signal enters main MCU, by 25 Phototube Coupling of optical coupling isolation circuit, the anti-interference ability of system can be improved.
The input terminal of driving circuit for electromagnetic valve 3 is electrically connected with the control output end of main MCU61, for controlling opening for solenoid valve
It opens and closes.
CAN interface 4 and main MCU61 are communicated to connect, and CAN interface 61 with CAN bus for connecting, to realize master
Data communication between MCU61 and control unit of engine (ECU).It is communicated to connect from MCU62 and main MCU61, and from MCU62's
Control output end is electrically connected with the input terminal of indicating fault circuit for lamp 5.
Main MCU61 receive control unit of engine transmission wheel speed sensor fault information when, can be transmitted to from
MCU62 when receiving wheel speed sensor fault information from MCU, controls indicating fault circuit for lamp 5, lights malfunction indicator lamp.Wheel
Failure has occurred in the fast bright wheel speed sensors of sensor fault information table.
In the present embodiment, the model MC9S12DP512 of main MCU is the automotive manufactured by Freescale company
16 MCU are 8 MCU manufactured by Motorola Inc. from the model MC68HC908AZ60 of MCU.
In the present embodiment, as shown in figure 4, indicating fault circuit for lamp 5 includes the first current-limiting resistance R17, the second current limliting electricity
Hinder R18, LED failure indicator light D3 and NPN triode Q1.One end of first current-limiting resistance R17 is exported with from the control of MCU62
End connection, the other end of the first current-limiting resistance R17 and the base stage of NPN triode Q1 connect.One end of second current-limiting resistance R18 with
The output end of power circuit 1 is electrically connected, and one end of the second current-limiting resistance R18 is electrically connected with the anode of LED failure indicator light D3；
The cathode of LED failure indicator light D3 is electrically connected with the collector of NPN triode Q1, the emitter ground connection of NPN triode Q1.
NPN triode Q1 in indicating fault circuit for lamp works in nonlinear state, NPN triode when base stage is low level
Q1 cut-off, when issuing high-level control signal from MCU62, NPN triode Q1 saturation conduction, LED failure indicator light D3 is lighted,
It reminds driver's ABS system to break down to need to exclude as early as possible.
The example of Fig. 1 is illustrated by taking the ABS system of four-way as an example.Four-way ABS system is passed using four wheel speeds
Sensor detects the wheel speed signal of the near front wheel of automobile, off-front wheel, left rear wheel and off hind wheel respectively, and uses four solenoid valves point
Not Tiao Jie the near front wheel, off-front wheel, left rear wheel and off hind wheel brake pressure.Correspondingly, abs controller is set there are four wheel speed signal
Conditioning circuit 2.In the present embodiment, driving circuit for electromagnetic valve 3 uses two panels smart power chip, each smart power chip
Two-way driving circuit for electromagnetic valve is integrated in smart power chip, respectively to drive two solenoid valves.Please refer to Fig. 5.Fig. 5 is only
It is shown in which the structure of one piece of smart power chip U8 and its peripheral circuit, model BTS621L1, by company, Infineon
Manufacture.Smart power chip U8 can also diagnose the working condition of each solenoid valve, and export diagnostic signal to master
MCU61.Main MCU61 is known that whether solenoid valve has occurred failure according to the diagnostic signal, and solenoid valve failure information is turned
It issues from MCU62, when receiving solenoid valve failure information from MCU62, controls indicating fault circuit for lamp 5, make malfunction indicator lamp point
It is bright.
Smart power chip U8 tool there are two control signal input IN1, IN2, two control signal output OUT1,
OUT2 and two diagnostic signal output end ST1, ST1.Two control signal inputs IN1, IN2 of smart power chip U8 point
Not Tong Guo an optical coupling isolation circuit be electrically connected with the control output end of main MCU61, two control signal outputs OUT1, OUT2 point
It is not electrically connected with two solenoid valves, two diagnostic signal output ends ST1, ST1 are electric with the diagnostic signal input terminal of main MCU61 respectively
Connection.The operating voltage of optical coupling isolation circuit U6, U7 are 5V, the power input and power circuit 1 of optical coupling isolation circuit U6, U7
Output end connection.The operating voltage of smart power chip U8 is 24V, can take electricity from automobile storage battery.
It is suitably applied 24V power supply environment according to the abs controller of the utility model embodiment, may be used primarily for motor bus
And the emergency brake control for brake of truck.
Claims (7)
1. a kind of abs controller, which is characterized in that including power circuit, multiple wheel speed signal conditioning circuits, solenoid-driven electricity
Road, CAN interface, indicating fault circuit for lamp, main MCU and from MCU；
The output end of the power circuit respectively with the power input of the main MCU, power input from MCU, more
The power input of a wheel speed signal processing circuit, the power input of the driving circuit for electromagnetic valve and the malfunction indicator lamp
The power input of circuit is electrically connected, and the power circuit is used to convert external input voltage for main MCU, from MCU, multiple
Operating voltage needed for wheel speed signal processing circuit, driving circuit for electromagnetic valve and indicating fault circuit for lamp；
The output end of the multiple wheel speed signal conditioning circuit is electrically connected with the input terminal of the main MCU respectively, each wheel speed
Output is to the master after the wheel speed signal for the speed probe output that signal conditioning circuit is used to receive carries out signal condition
MCU；
The input terminal of the driving circuit for electromagnetic valve is electrically connected with the control output end of the main MCU, for controlling solenoid valve
It opens and closes；
The CAN interface and the main MCU are communicated to connect, and CAN interface with CAN bus for connecting, to realize master
Data communication between MCU and control unit of engine；
It is described to be communicated to connect from MCU and the main MCU, and from the defeated of the control output end of MCU and the indicating fault circuit for lamp
Enter end electrical connection.
2. abs controller according to claim 1, which is characterized in that the wheel speed signal conditioning circuit include voltage with
With circuit, low-pass filter circuit, signal amplification circuit, shaping circuit and optical coupling isolation circuit；It is the voltage follower circuit, low
Bandpass filter circuit, signal amplification circuit, shaping circuit and optical coupling isolation circuit are sequentially connected, the output of the optical coupling isolation circuit
End is electrically connected with the input terminal of the main MCU.
3. abs controller according to claim 1, which is characterized in that the indicating fault circuit for lamp includes the first current limliting
Resistance, the second current-limiting resistance, LED failure indicator light and NPN triode；One end of first current-limiting resistance and it is described from
The control output end of MCU connects, and the other end of first current-limiting resistance is connect with the base stage of the NPN triode；Described
One end of two current-limiting resistances is electrically connected with the output end of the power circuit, one end of second current-limiting resistance and the LED
The anode electrical connection of malfunction indicator lamp；The cathode of the LED failure indicator light is electrically connected with the collector of the NPN triode,
The emitter of the NPN triode is grounded.
4. abs controller according to claim 1, which is characterized in that the abs controller includes Dolby circuit, described
Dolby circuit includes LC filter circuit and two decoupling capacitors being connected in parallel with each other；
The LC filter circuit includes filter inductance and filter capacitor, and one end of the filter inductance is defeated with the power circuit
Outlet electrical connection, the other end of the filter inductance are electrically connected with one end of the filter capacitor, another termination of filter capacitor
Ground；
One end of described two decoupling capacitors is electric with the power input of one end of the filter capacitor and the main MCU respectively
Connection, the other end ground connection of described two decoupling capacitors.
5. abs controller according to claim 1 or 4, which is characterized in that the model of the main MCU
MC9S12DP512。
6. abs controller according to claim 1, which is characterized in that the model MC68HC908AZ60 from MCU.
7. abs controller according to claim 1, which is characterized in that the abs controller is set there are four wheel speed signal tune
Manage circuit；
The driving circuit for electromagnetic valve includes two pieces of smart power chips；There are two control signal is defeated for each smart power chip tool
Enter end, two control signal outputs and two diagnostic signal output ends；Two control signals of the smart power chip
Input terminal passes through an optical coupling isolation circuit respectively and is electrically connected with the control output end of the main MCU, two control signal outputs
It is electrically connected respectively with two solenoid valves, two diagnostic signal output ends are electrically connected with the diagnostic signal input terminal of the main MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821274822.9U CN208855618U (en) | 2018-08-08 | 2018-08-08 | Abs controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821274822.9U CN208855618U (en) | 2018-08-08 | 2018-08-08 | Abs controller |
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| Publication Number | Publication Date |
|---|---|
| CN208855618U true CN208855618U (en) | 2019-05-14 |
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ID=66414177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821274822.9U Active CN208855618U (en) | 2018-08-08 | 2018-08-08 | Abs controller |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111361533A (en) * | 2020-02-25 | 2020-07-03 | 苏州挚途科技有限公司 | Anti-lock control method and device |
-
2018
- 2018-08-08 CN CN201821274822.9U patent/CN208855618U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111361533A (en) * | 2020-02-25 | 2020-07-03 | 苏州挚途科技有限公司 | Anti-lock control method and device |
| CN111361533B (en) * | 2020-02-25 | 2021-09-14 | 苏州挚途科技有限公司 | Anti-lock control method and device |
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