CN106774036B - Vehicle body control system and method - Google Patents
Vehicle body control system and method Download PDFInfo
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- CN106774036B CN106774036B CN201710148135.6A CN201710148135A CN106774036B CN 106774036 B CN106774036 B CN 106774036B CN 201710148135 A CN201710148135 A CN 201710148135A CN 106774036 B CN106774036 B CN 106774036B
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- 238000003745 diagnosis Methods 0.000 claims description 24
- 230000003993 interaction Effects 0.000 claims description 4
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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
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The embodiment of the invention discloses a vehicle body control system and a vehicle body control method, which are applied to the technical field of vehicle control. Wherein, this system includes: the signal acquisition unit is connected with the central control unit through the communication unit and is used for acquiring a vehicle body signal and a gear signal of the gear lever and outputting the vehicle body signal and the gear signal to the central control unit; the central control unit is connected with the communication unit and used for processing the vehicle body signal and the gear signal, generating a control instruction according to a processing result and sending the control instruction to the drive output unit through the communication unit; the driving output unit is connected with the central control unit through the communication unit and used for receiving the control instruction sent by the central control unit and outputting the control instruction to the corresponding vehicle body execution component; and the internal power supply unit is used for providing power support for the functional units. The vehicle body control system and the method can save the total cost of the vehicle body control system hardware and increase the integration of the vehicle body control system function.
Description
Technical Field
The invention belongs to the technical field of automobile control, and particularly relates to an automobile body control system and method.
Background
With the increasingly more competition in the traditional automobile industry, the automobile price is gradually reduced, and in order to improve the user experience and the brand value of the vehicle, more practical functions and intelligent devices are often added in the vehicle, such as: and an automatic speed changing and gear shifting function. An Automatic Mechanical Transmission (AMT) is modified on the basis of the original Mechanical Transmission (manual wave), and mainly changes a manual gear shifting control part. Namely, under the condition that the overall transmission structure is not changed, the automation of gear shifting is realized by additionally arranging an automatic operating system controlled by a microcomputer. AMT therefore is actually a robotic system that performs both actions of operating the clutch and selecting gears. As the AMT can be transformed on the basis of the manual wave of the existing production, the production inheritance is good, the input cost is low, and the AMT is easily accepted by production plants.
The AMT automatic gearbox gear control switch signal acquisition and conversion system module integrates the input and output of indication, action switch, gear locking control and other signals associated with a control lever into a vehicle body controller, and then sends all associated signals to an execution computer of an AMT through a bus so as to finish the speed change action. In the prior art, a signal acquisition and conversion system Module (a gear lever signal acquisition Module) of an AMT automatic transmission gear Control switch and a BCM (Body Control Module) are generally separate modules, so that the problem of high cost exists.
Disclosure of Invention
The invention provides a vehicle body control system and a vehicle body control method, and aims to solve the technical problem that an existing vehicle body control system is high in cost.
A first aspect of an embodiment of the present invention provides a vehicle body control system, including: the device comprises a central control unit, a signal acquisition unit, a drive output unit, a communication unit and an internal power supply unit;
the signal acquisition unit is connected with the central control unit through the communication unit and is used for acquiring vehicle body signals and gear signals of a gear lever and outputting the vehicle body signals and the gear signals to the central control unit;
the central control unit is connected with the communication unit and used for processing the vehicle body signal and the gear signal, generating a control instruction according to a processing result and sending the control instruction to the drive output unit through the communication unit;
the driving output unit is connected with the central control unit through the communication unit and is used for receiving the control instruction sent by the central control unit and outputting the control instruction to a vehicle body execution component corresponding to the control instruction so as to control the vehicle body execution component to execute corresponding operation, and the vehicle body execution component comprises a control component of the gear lever;
the internal power supply unit is externally connected with a battery pack and used for providing electric power support for the central control unit, the signal acquisition unit, the drive output unit and the communication unit.
A second aspect of the embodiments of the present invention provides a vehicle body control method, including:
acquiring a vehicle body signal and a gear signal of a gear lever through a signal acquisition unit;
processing the vehicle body signal and the gear signal, and generating a control instruction according to a processing result;
and sending the control command to a vehicle body execution component corresponding to the control command through a drive output unit so as to enable the vehicle body execution component to execute corresponding operation, wherein the vehicle body execution component comprises a control component of the gear lever.
It can be known from the above embodiments of the present invention that, by integrating two function modules for respectively acquiring a vehicle body signal and a gear signal of a gear lever in the same signal acquisition unit and processing the acquired signals by using the same central control unit, compared with the existing structure in which the gear lever signal acquisition module and the vehicle body control module are combined, the utilization rate of a single element can be improved, the total cost of vehicle body control system hardware can be saved, and the integration of vehicle body control system functions can be increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
FIG. 1 is a schematic structural diagram of a vehicle body control system according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a vehicle body control system according to a second embodiment of the present invention;
FIG. 3 is a schematic illustration of a vehicle body control system provided in accordance with a second embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating an implementation of a vehicle body control method according to a third embodiment of the invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle body control system according to a first embodiment of the invention. As shown in fig. 1, the vehicle body control system is a novel BCM system, and mainly includes: a central control unit 101, a signal acquisition unit 102, a drive output unit 103, a communication unit 104 and an internal power supply unit 105.
The signal acquisition unit 102 is connected to the central control unit 101 through the communication unit 104, and is configured to acquire a vehicle body signal and a gear signal of a gear lever and output the vehicle body signal and the gear signal to the central control unit 101.
And the central control unit 101 is connected with the communication unit 104 and is used for processing the vehicle body signal and the gear signal, generating a control instruction according to a processing result and sending the control instruction to the drive output unit 103 through the communication unit 104.
And the driving output unit 103 is connected with the central control unit 101 through the communication unit 104, and is used for receiving the control command sent by the central control unit 101 and outputting the control command to a vehicle body execution component corresponding to the control command so as to control the vehicle body execution component to execute a corresponding operation, wherein the vehicle body execution component comprises a control component of the gear lever.
The internal power supply unit 105 is externally connected with a battery pack and used for providing electric power support for the central control unit 101, the signal acquisition unit 102, the drive output unit 103 and the communication unit 104.
In the embodiment of the invention, two functional modules which are respectively used for acquiring the vehicle body signal and the gear signal of the gear lever are integrated in the same signal acquisition unit, and the same central control unit is used for processing the acquired signals, so that compared with the structure that the existing gear lever signal acquisition module and the vehicle body control module are combined, the utilization rate of a single element can be improved, the total cost of vehicle body control system hardware is saved, and the integration of the vehicle body control system function is increased.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a vehicle body control system according to a second embodiment of the invention. As shown in fig. 2, the vehicle body control system is a novel BCM system, and mainly includes: a central control unit 201, a signal acquisition unit 202, a drive output unit 203, a communication unit 204, an internal power supply unit 205, and a diagnostic unit 206.
The signal acquisition unit 202 is connected to the central control unit 201 through the communication unit 204, and is configured to acquire a vehicle body signal and a gear signal of a gear lever and output the vehicle body signal and the gear signal to the central control unit 201.
Specifically, the signal acquisition unit 202 includes: the car body signal acquisition circuit 2021 and the gear signal acquisition circuit 2022, and the car body signal acquisition circuit 2021 and the gear signal acquisition circuit 2022 are integrated together, and communicate with the central control unit 201 through the same communication line and share the same internal power system.
And the central control unit 201 is connected with the communication unit 204 and is used for processing the vehicle body signal and the gear signal, generating a control instruction according to a processing result and sending the control instruction to the drive output unit 203 through the communication unit 204.
Specifically, the central control Unit 201 may be, for example, a Micro Controller Unit (MCU), or may also be referred to as a main chip. Various types of vehicle body signals and gear signals of the gear lever are acquired to the main chip through the hardware acquisition circuit in the signal acquisition unit 202, so that the main chip can process the signals. Wherein, the body signal may for example but not limited to include: light switch, lock switch, sensor signal, collision signal, etc.
And the driving output unit 203 is connected with the central control unit 201 through the communication unit 204, and is used for receiving the control command sent by the central control unit 201 and outputting the control command to a vehicle body execution component corresponding to the control command so as to control the vehicle body execution component to execute an operation corresponding to the control command, wherein the vehicle body execution component comprises a control component of the gear lever.
Specifically, the driving output unit 203 transmits various control commands of the main chip to various execution components of the vehicle body through the driving circuit, for example: various lamps, indicator lamps, wiper motors, lock motors, gear shift lever gear locking control components and the like. Like this, adopt the chip to handle input/output signal through same main chip, can strengthen the electronization and the travelling comfort of automobile body control operation, practice thrift the use of vehicle pencil.
And the diagnosis unit 206 is connected with the central control unit 201 through the communication unit 204 and is used for acquiring a fault diagnosis instruction and fault information of the central control unit 201 and performing vehicle body fault diagnosis.
Optionally, the diagnosis unit 206 includes: and a K-wire communication unit 2061 connected to the central control unit 201 and the K-wire (KLine) diagnostic instrument. And a K-wire communication unit 2061 configured to send the fault diagnosis instruction and the fault information of the central control unit 201 to the K-wire diagnostic apparatus through a K-wire, so that the K-wire diagnostic apparatus performs vehicle body fault diagnosis according to the fault diagnosis instruction and the fault information.
In this way, data exchange can be realized through the K-line diagnostic instrument and the central control unit, so that the functional requirement of online diagnosis of the whole vehicle is realized. On one hand, due to the adoption of a universal K-line diagnosis protocol, the development period and difficulty can be reduced, the functional diagnosis of the gear lever gear signal acquisition module can be realized only by sharing a KLine diagnostic instrument of the BCM, and the operation cost of an automobile vendor is saved. On the other hand, the function of vehicle online diagnosis is realized through the K line, information such as fault codes can be directly read through the diagnostic instrument, and development or maintenance personnel can conveniently judge the vehicle state.
The internal power supply unit 205 is an external battery pack and is used for providing electric power support for the central control unit 201, the signal acquisition unit 102, the driving output unit 203, the communication unit 204 and the diagnosis unit 206. That is, all functional units within the system share the same power supply system.
The communication unit 204 includes: a Controller Area Network BUS (CANBUS) communication unit 2041 and a serial interconnection Network (LIN) communication unit 2042.
The CANBUS communication unit 2041 is configured to establish data connection among the signal acquisition unit 202, the central control unit 201, the non-low-speed intelligent module of the vehicle body, and the shift lever through a Controller Area Network (CAN), send the vehicle body signal of the non-low-speed intelligent module and the shift signal acquired by the signal acquisition unit 202 to the central control unit 201 through the CANBUS, and send the control command to the non-low-speed intelligent module and the shift lever through the CANBUS by driving the output unit 203.
In practical application, information exchange, receiving and sending of state signals of the original BCM and Control commands of speed change Control of the gear lever signal acquisition module CAN be realized through the CAN network and other modules of the whole vehicle, such as a TCU (Transmission Control Unit), an ECU (Electronic Control Unit) and other external modules. Specifically, the BCM is connected with an engine ECU, a transmission TCU and an instrument panel through a CAN network, and vehicle body information and gear information of the BCM are sent to a CAN bus, for example: gear signals, door switch signals, door lock state signals, output signals of various lighting lamps and the like are uploaded to the CAN bus in real time. Meanwhile, the rotation speed, the power state and the like of the engine are acquired through the CAN bus.
Like this, carry out real-time information interchange through CAN bus and other electronic module of automobile body, when having practiced thrift the pencil, still CAN strengthen automobile body control system's reliability and real-time.
The LIN communication unit 2042 is used for connecting the central control unit 201 with the low-speed intelligent module of the vehicle body, so that the low-speed intelligent module performs information interaction with the central control unit 201 through the low-speed LIN.
Therefore, through the single-wire communication mode of LIN with extremely high cost performance, the environmental information can be conveniently communicated with other low-speed intelligent modules (such as a rainfall sensor module, a light sensor module and the like) of the vehicle body in real time, and more intelligent user function experience can be conveniently realized.
Optionally, signal acquisition unit 202 CAN be formed by general automobile body signal acquisition module and gear signal acquisition module are integrated, and the CAN communication unit that all need use with original every module integrates into one and shares, and the internal power supply that logic circuit used shares, and master control MCU shares, KLine diagnostic equipment and the shell and the sharing of part binding post of moulding plastics.
Referring to fig. 3, fig. 3 is a schematic diagram of a vehicle body control system according to the present embodiment. As shown in fig. 3, a vehicle body control system (BCM) mainly includes the following parts:
1. vehicle body switch signal and gear lever signal acquisition unit: various types of vehicle body signals and gear signals of a gear lever are collected to a Main Chip (MCU) through a hardware collecting circuit, wherein the vehicle body signals are as follows: light switch, lock switch, sensor signal, collision signal, etc.
2. The main chip MCU: the gear signal processing device is used for processing a vehicle body switch signal and a gear signal of a gear lever and forming an operation instruction.
3. A drive output unit: the command of the main chip is transmitted to the vehicle body execution component through the driving circuit, for example: various lamps, indicator lamps, wiper motors, lock motors and the like.
4. CANBUS communication unit: the BCM is connected with an engine ECU, a gearbox TCU and an instrument panel through a CAN network, and the body information and the gear information of the BCM are sent to a CAN bus, for example: gear signals, door switch signals, door lock state signals, output signals of various lighting lamps and the like are uploaded to the CAN bus in real time; meanwhile, the rotating speed, the vehicle speed, the power state and the like of the engine are acquired in real time through the CAN bus.
5. K line communication unit: the function of vehicle online diagnosis is realized through K lines, information such as fault codes can be directly read through the diagnostic instrument, and development or maintenance personnel can conveniently judge the vehicle state.
6. LIN line communication unit: and exchanging data with other intelligent low-speed modules.
In the embodiment of the invention, by adopting the mode that one vehicle body control system module integrates a plurality of functional units, all the functional units in the vehicle body control system module CAN share the power supply system, the main MCU and the CAN communication loop, so that compared with the prior art, the vehicle body control system has the advantages that the functional integration is increased, the hardware expense is greatly saved, and the cost is reduced.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating an implementation of a vehicle body control method according to a third embodiment of the invention. As shown in fig. 4, the method mainly includes the following steps.
S301, acquiring a vehicle body signal and a gear signal of a gear lever through a signal acquisition unit;
specifically, the central control unit is connected with a signal acquisition unit through a communication unit, and a vehicle body signal acquisition circuit and a gear signal acquisition circuit are integrated in the signal acquisition unit. The signal acquisition unit acquires a vehicle body signal and a gear signal of the gear lever and sends the vehicle body signal and the gear signal to the central control unit. Wherein the body signal may for example but not limited to include: light switch, lock switch, sensor signal, collision signal, etc.
S302, processing the acquired vehicle body signal and gear signal, and generating a control instruction according to a processing result;
the central control unit processes the vehicle body signal and the gear signal according to a preset signal processing mode, such as digital, analog, pulse signal processing and the like, and then generates a control command according to a processing result, wherein the control command can include but is not limited to: one or more of various lamp control instructions, wiper motor control instructions, motor locking control instructions, gear lever gear locking control instructions and the like.
And S303, sending the control command to a vehicle body execution component corresponding to the control command through the drive output unit so as to enable the vehicle body execution component to execute corresponding operation, wherein the vehicle body execution component comprises a control component of a gear lever.
The central control unit sends the control instruction to the drive output unit through the communication unit, and then the control instruction is output to the vehicle body execution component corresponding to the control instruction by the drive output unit, such as: various lamps, indicator lamps, wiper motors, lock motors, gear shift lever gear locking control components and the like.
In a specific application example, the operating instruction is formed by signal acquisition of a BCM and a gear signal acquisition module (namely, a signal acquisition unit) of a gear shift lever, and the output of the BCM and the AMT is driven and controlled by judging the state of a vehicle body part and the gear shift lever and switching information.
Optionally, in another embodiment of the present invention, the method further includes: and sending the fault diagnosis instruction and the fault information to a K-line diagnostic instrument through a K line so that the K-line diagnostic instrument carries out vehicle body fault diagnosis according to the fault diagnosis instruction and the fault information. The vehicle body and the gear lever gear signal acquisition module can be used for fault detection only once by connecting the K line with a diagnostic instrument and mutually transmitting data.
Optionally, in another embodiment of the present invention, the method further includes: dynamic information interaction is carried out with a low-speed intelligent module in the vehicle body through a low-speed serial communication bus; and acquiring the state information of the non-low-speed intelligent module and the gear position of the gear lever in the vehicle body through the controller local area network bus. Namely, the LIN communication unit in the communication unit realizes the dynamic information communication with other low-speed intelligent modules such as the rainfall sensor module and the light sensor module, thereby realizing more intelligent user function experience. Meanwhile, the signal acquisition unit uploads the acquired state information of the non-low-speed intelligent module and the state information of the gear position of the gear lever to a CAN bus in real time through CAN communication, and the central control unit acquires the real-time information of the non-low-speed intelligent module and the gear position of the gear lever such as the rotating speed, the vehicle speed and the gear position of the gearbox through the CAN bus.
In the embodiment of the invention, by adopting the mode that one vehicle body control system module integrates a plurality of functional units, all the functional units in the vehicle body control system module CAN share the power supply system, the main MCU and the CAN communication loop, so that compared with the prior art, the vehicle body control system has the advantages that the functional integration is increased, the hardware expense is greatly saved, and the cost is reduced.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In view of the above description of the vehicle body control system and method provided by the present invention, those skilled in the art will recognize that changes may be made in the embodiments and applications of the invention, and accordingly, the disclosure is not to be considered as limiting the invention.
Claims (8)
1. A vehicle body control system, characterized in that the system comprises:
the device comprises a central control unit, a signal acquisition unit, a drive output unit, a communication unit and an internal power supply unit;
the signal acquisition unit is connected with the central control unit through the communication unit and is used for acquiring vehicle body signals and gear signals of a gear lever and outputting the vehicle body signals and the gear signals to the central control unit; the signal acquisition unit includes: the vehicle body signal acquisition circuit and the gear signal acquisition circuit are integrated together, communicate with the central control unit through the same communication line and share the same internal power supply system;
the central control unit is connected with the communication unit and used for processing the vehicle body signal and the gear signal, generating a control instruction according to a processing result and sending the control instruction to the drive output unit through the communication unit;
the driving output unit is connected with the central control unit through the communication unit and is used for receiving the control instruction sent by the central control unit and outputting the control instruction to a vehicle body execution component corresponding to the control instruction so as to control the vehicle body execution component to execute corresponding operation, and the vehicle body execution component comprises a control component of the gear lever;
the internal power supply unit is externally connected with a battery pack and used for providing electric power support for the central control unit, the signal acquisition unit, the drive output unit and the communication unit;
the communication unit includes: a controller area network bus communication unit;
the controller local area network bus communication unit is used for establishing data connection among the signal acquisition unit, the central control unit, the non-low-speed intelligent module of the vehicle body and the gear lever through a controller local area network, sending the vehicle body signal and the gear signal of the non-low-speed intelligent module acquired by the signal acquisition unit to the central control unit through the controller local area network bus, and sending the control command to the non-low-speed intelligent module and the gear lever through the drive output unit through the controller local area network bus.
2. The vehicle body control system of claim 1, further comprising:
and the diagnosis unit is connected with the central control unit through the communication unit and is used for acquiring the fault diagnosis instruction and the fault information of the central control unit and diagnosing the vehicle body fault.
3. The vehicle body control system of claim 1, wherein the diagnostic unit comprises:
and the K-wire communication unit is connected with the central control unit and the K-wire diagnostic instrument and is used for sending the fault diagnosis instruction and the fault information of the central control unit to the K-wire diagnostic instrument through a K wire so that the K-wire diagnostic instrument can carry out vehicle body fault diagnosis according to the fault diagnosis instruction and the fault information.
4. A vehicle body control system according to any one of claims 1 to 3, wherein said communication unit further comprises: a serial communication bus communication unit;
and the serial communication bus communication unit is used for connecting the central control unit with the low-speed intelligent module of the vehicle body so as to enable the low-speed intelligent module to perform information interaction with the central control unit through a low-speed serial communication bus.
5. A body control system according to claim 2 or 3, wherein said internal power supply unit is further adapted to provide electrical support for said diagnostic unit.
6. A vehicle body control method, characterized by comprising:
acquiring a vehicle body signal and a gear signal of a gear lever through a signal acquisition unit;
the central control unit is connected with the signal acquisition unit through a communication unit, a vehicle body signal acquisition circuit and a gear signal acquisition circuit are integrated in the signal acquisition unit, and the signal acquisition unit acquires the vehicle body signal and the gear signal of the gear lever and sends the vehicle body signal and the gear signal to the central control unit;
processing the vehicle body signal and the gear signal, and generating a control instruction according to a processing result;
sending the control command to a vehicle body execution component corresponding to the control command through a drive output unit so as to enable the vehicle body execution component to execute corresponding operation, wherein the vehicle body execution component comprises a control component of the gear lever;
and receiving the vehicle body information and the gear signal through a controller area network bus, and sending the control instruction to a vehicle body execution component corresponding to the control instruction through a drive output unit through the controller area network bus.
7. The vehicle body control method according to claim 6, characterized by further comprising:
and sending the fault diagnosis instruction and the fault information to a K-line diagnostic instrument through a K line so that the K-line diagnostic instrument carries out vehicle body fault diagnosis according to the fault diagnosis instruction and the fault information.
8. The vehicle body control method according to claim 6, characterized by further comprising:
dynamic information interaction is carried out with a low-speed intelligent module in the vehicle body through a low-speed serial communication bus;
and acquiring the state information of the non-low-speed intelligent module and the gear position of the gear lever in the vehicle body through a controller area network bus.
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| CN108319217A (en) * | 2018-03-19 | 2018-07-24 | 延锋伟世通汽车电子有限公司 | CAN, LIN control circuit based on STM32 systems |
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| WO2006048125A1 (en) * | 2004-11-04 | 2006-05-11 | Rainer Mäckel | Monitoring system for on-board supply network, for production and service |
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