CN212950398U

CN212950398U - Intelligent controller for electric side pedal of automobile

Info

Publication number: CN212950398U
Application number: CN202020835911.7U
Authority: CN
Inventors: 卫清泉; 高峰
Original assignee: Hite Automotive Technology Suzhou Co ltd
Current assignee: Hite Automotive Technology Suzhou Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-04-13
Anticipated expiration: 2030-05-19

Abstract

The utility model discloses an electronic side footboard intelligent control ware of car, including electrical unit, the control unit and motor drive unit to and CAN chip communication module, LIN chip communication module, automobile body hard wire signal processing module, its characterized in that the control unit include MCU module and the voltage detection module, current detection module, temperature detection circuit, the soft stop module of MOSFET soft start and motor drive circuit who links to each other with it. The module has multiple alarm functions, and also has the functions of soft start and soft stop of the motor, so that the abrasion of the motor and a mechanical structure can be reduced, the reliability of the assembly is better, and the service life is longer; the system has passenger protection functions of preventing clamping, collision and the like, and is high in system safety; the system has multiple communication modes and is suitable for multiple platforms, and two paths of motor driving circuits can be matched randomly according to different vehicle types; the platform research and development can greatly reduce the research and development period and the research and development cost.

Description

Intelligent controller for electric side pedal of automobile

Technical Field

The utility model discloses an electronic side footboard intelligent control ware of car belongs to the car and attaches equipment technical field.

Background

The automobile electric pedal is an electric pedal capable of automatically stretching and retracting, and is equipment for providing a pedal position for getting on and off a high-chassis automobile. The electric pedal is composed of a pedal, a telescopic mechanism, a driving motor assembly, a controller, a control wire harness, an installation accessory and the like.

The existing intelligent electric side pedal controller mainly controls a motor through a door signal of 4 doors, and enables a pedal to perform extending and retracting functions when appropriate. The intelligent electric side pedal controller has a single function, the motor is strong in sudden starting and stopping, the safety of passengers is poor due to collision and clamping, the functions of abnormal alarming and the like are lacked, the functions of voltage protection, temperature protection and the like are lacked, and the intelligent electric side pedal controller is not suitable for a whole vehicle with higher functional requirements.

Disclosure of Invention

The utility model aims at providing an electronic side footboard intelligent control ware of car aims at overcoming the not enough of current controller.

The intelligent controller for the electric side pedal of the automobile comprises a power supply unit, a control unit, a motor driving unit, a CAN chip communication module, a LIN chip communication module and a hard wire signal processing module of the automobile body, and is characterized in that the control unit comprises a MCU module, a voltage detection module, a current detection module, a temperature detection circuit, a MOSFET soft start and soft stop module and a motor driving circuit which are connected with the MCU module.

The power supply unit is formed by a 12V-to-5V voltage reduction module circuit connected with a 12V power supply module, converts a 12V power supply into 5V and then is connected to the MCU;

the voltage detection module consists of a voltage division resistor and a filter capacitor and transmits the value of the 12V power supply module to the MCU for detection;

the temperature detection circuit consists of a voltage division circuit consisting of a resistor and a thermistor and a filter capacitor, and converts the temperature of the PCB end into analog quantity which is transmitted to the MCU for detection;

the current detection module consists of an operational amplifier and a bus sampling resistor, is connected with the motor drive circuit and the MCU, detects the current of the lower-end bus, and transmits the value to the MCU for detection.

The motor driving circuit consists of two paths of relays driven by transistor switches connected with the MCU, and the relays are respectively connected with the motor;

the MOSFET soft start and stop module is an electronic switch circuit which is connected in series with a motor power supply loop and has a gradual-on and gradual-off function, the control end of the electronic switch circuit with the gradual-on and gradual-off function is connected with the output port of the MCU, and the MCU provides a control signal.

The interface is connected with the MCU and the vehicle body end, transmits an external instruction signal to the MCU, and transmits a feedback signal of the MCU to an external vehicle body.

The CAN chip communication module, the LIN chip communication module and the vehicle body hard wire signal processing module belong to the known technology, and the detailed description is omitted, and reference is made to the embodiments.

During operation, the controller drives the motor to make corresponding actions by receiving external signals (the external signals CAN be communicated with the module through a CAN chip, an LIN chip or a hard wire model), and meanwhile, the power supply voltage, the working temperature and the bus current are monitored, and the normal operation of the controller is ensured. When the pedal is extended and retracted to meet a passenger or an obstacle, the pedal enters an anti-pinch or anti-collision mode to protect the passenger. When the vehicle speed is larger than a certain value, the pedal can be forcibly retracted. The driver may also enter the disabled mode or disengage the disabled mode by an in-vehicle switch. Under different working modes, the controller can remind the driver through different ringing modes. The controller and the vehicle body CAN realize that a single module CAN be commonly used on a plurality of platforms through various communication modes such as CAN chip communication, LIN chip communication, vehicle body hard wire signal communication and the like. Two paths of motor driving circuits are built in, so that the bicycle is suitable for both bicycle models with pedals on two sides and bicycle models with pedals on one side.

The utility model has complete functions, can monitor voltage, current and temperature, has various alarm functions, has the functions of soft start and soft stop of the motor, and can reduce the abrasion of the motor and a mechanical structure, so that the assembly has better reliability and longer service life; the system has passenger protection functions of preventing clamping, collision and the like, and is high in system safety; the system has multiple communication modes and is suitable for multiple platforms, and two paths of motor driving circuits can be matched randomly according to different vehicle types; the platform research and development can greatly reduce the research and development period and the research and development cost, and the control algorithm is simple.

Drawings

FIG. 1 is a block diagram of the connection of a controller to an electric pedal and a vehicle body.

Fig. 2 is an electrical schematic block diagram of an intelligent controller.

Fig. 3 is a 12V to 5V circuit of the controller.

Fig. 4 is a motor driving circuit of the controller.

Fig. 5 is a soft start control circuit of the controller.

Fig. 6 is a current sampling circuit of the controller.

Fig. 7 is a CAN module circuit of the controller.

Fig. 8 is a LIN module circuit of the controller.

Fig. 9 is a temperature detection module circuit of the controller.

Fig. 10 is a circuit of a voltage detection module of the controller.

Fig. 11 is a hard-wired signal circuit of the controller.

Detailed Description

The following further description is made with reference to the accompanying drawings and specific examples:

referring to fig. 1, an electric pedal 3 is connected to a controller 2 and a real vehicle, the vehicle body 1 sends an instruction to the controller 2 through communication (including 3 communication modes of CAN chip communication, LIN chip communication, and hard wire signal communication) to control the operation of the electric pedal, and the controller 2 also feeds back the state of the controller to the vehicle body 1 through communication.

Please refer to fig. 2 for the overall connection.

The 12V power supply module 1 is connected with the 12V to 5V module 2, the voltage detection module 3, the motor drive circuit 5, the motor 6 and the motor 7, and the 12 to 5V module 2 converts a 12V power supply into 5V and then is connected to the MCU 4; the voltage detection module 3 transmits the value of the 12V power supply module 1 to the MCU4 for detection; the temperature detection module 8 converts the temperature of the PCB end into analog quantity and transmits the analog quantity to the MCU4 for detection; the interface 10 is connected with the MCU4 and the vehicle body end 11, transmits an external command signal to the MCU4, and transmits a feedback signal of the MCU4 to an external vehicle body; the MCU4 is connected with the motor driving circuit 5, the motor driving circuit 5 is connected with the motor 6 and the motor 7, the MCU4 is used for configuring driving parameters of the motor driving circuit 5, and the motor driving circuit 5 further drives the pedal motor 6 and the motor 7; the current detection 9 is connected with the motor drive circuit 5 and the MCU4, detects the current of the lower-end bus, and transmits the value to the MCU4 for detection.

The MCU in this embodiment adopts an S9S12G128 series single chip microcomputer.

Referring to fig. 3, a 12V to 5V circuit in a controller, a 12V power circuit mainly comprises a voltage dependent resistor, a capacitor, a resistor, an inductor and a power conversion chip, and the circuit mainly functions to convert 12V voltage into 5V voltage and provide power for an MCU, a sampling circuit and the like. The 12V filter also directly supplies power to a motor driving circuit.

Referring to fig. 4, a motor driving circuit in the controller mainly comprises a diode, a triode, a mosfet, a resistor, a capacitor and a relay, the main function of the circuit is to control the relay through the output of the MCU through the driving circuit so as to control the forward and reverse rotation of the motor, and the mosfet at the lower end is used to control the soft start and the soft stop.

Referring to fig. 5, a soft start control circuit in the controller mainly comprises a diode, a triode, a resistor and a capacitor, and the circuit has the main function that the MCU outputs a PWM wave to drive the mosfet in fig. 4 through a driving circuit, thereby realizing soft start and soft stop.

Referring to fig. 6, the current detection module in the controller is formed by overlapping a first-stage operational amplifier, a sampling resistor and a bypass capacitor, wherein the sampling resistor and the bypass capacitor are in direct current coupling with an input end of the first-stage operational amplifier. The operational amplifier adopts an MCP6001U integrated circuit, and the sampling resistor is a wire winding resistor of 10 milli-ohm 5 watt.

The main function of the circuit is to detect the bus current, and the circuit has the functions of overcurrent, overload and dry running protection; the operational amplifier amplifies and samples the voltage at two ends of the resistor to acquire the voltage for the MCU, the larger the acquired voltage is, the larger the current running current is, the current of the motor can be monitored in real time according to the AD quantity acquired by the MCU, and the current state of the motor can be judged according to the current, so that the MCU can send out corresponding control logic.

Referring to fig. 7, a CAN module circuit in the controller mainly includes a CAN chip, a capacitor, and a resistor, and the circuit mainly functions as a CAN communication module to implement communication between the controller and the outside.

Please refer to fig. 8, a LIN module circuit in the controller mainly includes a LIN chip, a capacitor, and a resistor, and the LIN communication module is used as the main function of the circuit to realize communication between the controller and the outside.

Referring to fig. 9, the temperature detection module circuit in the controller mainly includes an NTC, a resistor, and a capacitor, and the circuit mainly functions to detect the temperature of the intelligent controller module and has over-temperature and under-temperature protection functions.

Referring to fig. 10, a voltage detection module circuit in the controller mainly includes a zener diode, a resistor, and a capacitor, and the circuit mainly functions to detect the voltage of the intelligent controller module and has overvoltage and undervoltage protection functions.

Referring to fig. 11, a hard-wired signal circuit in the controller mainly comprises a voltage stabilizing diode, a resistor and a capacitor, and the circuit has the main function of processing a hard-wired signal outside a vehicle body to further enable an MCU to collect the signal, and belongs to a hard-wired signal communication function.

Claims

1. The intelligent controller for the electric side pedal of the automobile comprises a power supply unit, a control unit, a motor driving unit, a CAN chip communication module, a LIN chip communication module and a hard wire signal processing module of the automobile body, and is characterized in that the control unit comprises a MCU module, a voltage detection module, a current detection module, a temperature detection circuit, a MOSFET soft start and soft stop module and a motor driving circuit which are connected with the MCU module.

2. The intelligent controller for the electric side pedal of the automobile according to claim 1, wherein the power supply unit is formed by a 12V to 5V step-down module circuit connected with a 12V power supply module, and the 12V power supply module is connected to the MCU after converting the 12V power supply into 5V power supply.

3. The intelligent controller for automobile electric side pedal according to claim 1, wherein the voltage detection module is composed of a voltage dividing resistor and a filter capacitor.

4. The intelligent controller for electric side pedal of vehicle as claimed in claim 1, wherein the temperature detecting circuit comprises a voltage dividing circuit consisting of a resistor and a thermistor, and a filter capacitor.

5. The intelligent controller for the electric side pedal of the automobile as claimed in claim 1, wherein the current detection module is composed of an operational amplifier and a bus sampling resistor, and is connected with the motor driving circuit and the MCU.

6. The intelligent controller for the electric side pedal of the automobile according to claim 1, wherein the motor driving circuit is composed of two transistor switch driven relays connected with the MCU, and the relays are respectively connected with the motor.

7. The intelligent controller for the electric side pedal of the automobile according to claim 1, wherein the MOSFET soft start and soft stop module is an electronic switch circuit with a gradually switching function connected in series with a power supply circuit of the motor, and a control end of the electronic switch circuit with the gradually switching function is connected with an output port of the MCU.

8. The intelligent controller for the electric side pedal of the automobile as claimed in claim 1, wherein the MCU employs an S9S12G128 series single chip microcomputer.

9. The intelligent controller for automobile electric side pedal according to claim 1, wherein the current detection module is formed by connecting a primary operational amplifier and a sampling resistor and a bypass capacitor which are in direct current coupling with the input end of the primary operational amplifier, the operational amplifier is an MCP6001U integrated circuit, and the sampling resistor is a wire-wound resistor of 10 milliohms and 5 watts.