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CN-122009081-A - Automobile safety belt winder control system

CN122009081ACN 122009081 ACN122009081 ACN 122009081ACN-122009081-A

Abstract

The invention discloses a control system of an automobile safety belt retractor, which relates to the field of automobiles and comprises an ECU (electronic control unit) control module, a stepping motor driving module and a stepping motor driving module, wherein the ECU control module is used for receiving an external angle signal through a LIN (line-in-line) bus, calculating control parameters of a stepping motor according to the angle signal and outputting the motor control signal to the stepping motor driving module, and the stepping motor driving module is used for receiving the motor control signal and driving the stepping motor to operate based on the motor control signal.

Inventors

  • WU ZHENGHUA
  • LIN HONG
  • GONG YU
  • RAO YONGZHOU
  • CHEN YANG
  • XIAO LIHUA

Assignees

  • 深圳市高科润电子有限公司
  • 高科润电子(浙江)有限公司

Dates

Publication Date
20260512
Application Date
20260227

Claims (7)

  1. 1. An automobile safety belt retractor control system, characterized in that the automobile safety belt retractor control system comprises: The ECU control module is used for receiving external angle signals through the LIN bus, calculating control parameters of the stepping motor according to the angle signals and outputting motor control signals to the stepping motor driving module; The stepping motor driving module is used for receiving the motor control signal, driving the stepping motor to run based on the motor control signal, and feeding back driving state and fault information to the ECU control module in real time; the first end of the ECU control module is connected with the bidirectional input and output port of the stepping motor driving module, and the ECU control module and the stepping motor driving module are integrated on the same circuit board which is arranged in the safety belt retractor body.
  2. 2. The automobile safety belt retractor control system according to claim 1, wherein the ECU control module comprises a chip U1, the type of the chip U1 is complex micro-electronic FM36LV043A, pin 3 of the chip U1 is connected to one end of a resistor R19, one end of a resistor R20 and one end of a capacitor C17, the other end of the capacitor C17 is grounded, the other end of the resistor R20 is grounded, the other end of the resistor R19 is connected to a supply voltage VC, pin 16 of the chip U1 is connected to one end of a filter magnetic bead L2 and one end of a capacitor C15, the other end of the capacitor C15 is grounded, the other end of the filter magnetic bead L2 receives an external angle signal through a LIN bus, the other end of the filter magnetic bead L2 is connected to the negative electrode of a TVS tube D3, pins 13, 20, 21, 22 and 23 of the chip U1 are respectively connected to the bidirectional input and output ports of the stepper motor drive module through a resistor, and pins 12, 17, 18 and 19 of the chip U1 are connected to the bidirectional input and output ports of the stepper motor drive module.
  3. 3. The automobile safety belt retractor control system according to claim 1, wherein the stepper motor driving module comprises a chip U2, the type of the chip U2 is nano-core microelectronic NSD8389, pins 11, 13, 15, 16 and 17 of the chip U2 are connected with the first end of the ECU control module, pins 18, 19, 20 and 21 of the chip U2 are respectively connected with the first end of the ECU control module through a resistor, pins 3, 4, 5 and 6 of the chip U2 are connected with an interface J2, and the interface J2 is externally connected with the stepper motor.
  4. 4. The automobile safety belt retractor control system according to any one of claims 1 to 3, further comprising a memory module for storing system parameters and fault records, wherein a bi-directional input/output port of the memory module is connected to the second end of the ECU control module, and the memory module is also integrated on a circuit board on which the ECU control module and the stepper motor drive module are integrated.
  5. 5. The vehicle seat belt retractor control system of claim 4, wherein the memory module comprises a die U3, the die U3 being configured such that SCL and SDA pins of the die U3 are connected to the second end of the ECU control module.
  6. 6. The automobile safety belt retractor control system according to any one of claims 1 to 3, further comprising a power input module for processing an input power to achieve reverse connection protection, surge protection, filtering out a foreign signal, supplying power to the ECU control module, and reducing power consumption in a system sleep state, wherein a bidirectional input/output port of the power input module is connected to a third end of the ECU control module.
  7. 7. The automobile safety belt retractor control system according to claim 6, wherein the power input module comprises a MOS tube M1 and a triode Q1, a D pole of the MOS tube M1 is connected with a third end of the ECU control module, a G pole of the MOS tube M1 is connected with one end of a resistor R21, a positive pole of a diode D5 and one end of a resistor R22, the other end of the resistor R22 is connected with a collector of the triode Q1, an emitter of the triode Q1 is grounded, a base of the triode Q1 is connected with the third end of the ECU control module through a resistor R23, the S pole of the MOS tube M1 is connected with the other end of the resistor R21, the negative pole of the diode D5, one end of a capacitor C7, one end of a filter magnetic bead L1, a first power supply VBAT, the other end of the capacitor C7 is grounded, the other end of the filter magnetic bead L1 is connected with a negative pole of the diode D2, the positive pole of the diode D2 is connected with a negative pole of the diode D1 and one end of a connector J1, the positive pole of the diode D1 is grounded, and the connector J1 is externally connected with a second power supply source.

Description

Automobile safety belt winder control system Technical Field The invention relates to the field of automobiles, in particular to an automobile safety belt winder control system. Background The automobile safety belt winder control system is an indispensable important component part in a vehicle safety protection device, and the function of the automobile safety belt winder control system is mainly that when the angle of a seat back or a seat cushion is adjusted, the position of a sensitive ball device is adjusted in real time through the cooperative work of an ECU (electronic control unit) and a LIN (local interconnect network) stepping motor so as to ensure that the locking function of a safety belt meets the requirements of related safety regulations. The current mass production schemes in the market mostly adopt a design mode that an ECU control module is separated from a stepping motor driving module. The two are connected through a wire harness to transmit angle signals and control instructions. Such discrete designs result in high material and manufacturing costs and require improvement. Disclosure of Invention The invention aims to provide a control system of an automobile safety belt retractor, which aims to solve the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: an automotive seat belt retractor control system comprising: The ECU control module is used for receiving external angle signals through the LIN bus, calculating control parameters of the stepping motor according to the angle signals and outputting motor control signals to the stepping motor driving module; The stepping motor driving module is used for receiving the motor control signal, driving the stepping motor to run based on the motor control signal, and feeding back driving state and fault information to the ECU control module in real time; the first end of the ECU control module is connected with the bidirectional input and output port of the stepping motor driving module, and the ECU control module and the stepping motor driving module are integrated on the same circuit board which is arranged in the safety belt retractor body. As a still further scheme of the invention, the ECU control module comprises a chip U1, the type of the chip U1 is FM36LV043A of a complex micro-electronic, a pin 3 of the chip U1 is connected with one end of a resistor R19, one end of a resistor R20 and one end of a capacitor C17, the other end of the capacitor C17 is grounded, the other end of the resistor R20 is grounded, the other end of the resistor R19 is connected with a supply voltage VC, a pin 16 of the chip U1 is connected with one end of a filter magnetic bead L2 and one end of a capacitor C15, the other end of the capacitor C15 is grounded, the other end of the filter magnetic bead L2 receives an external angle signal through a LIN bus, the other end of the filter magnetic bead L2 is connected with the cathode of a TVS tube D3, the anode of the TVS tube D3 is grounded, pins 13, 20, 21, 22 and 23 of the chip U1 are respectively connected with a bidirectional input and output port of the stepper motor drive module through a resistor, and pins 12, 17, 18 and 19 of the chip U1 are connected with the bidirectional input and output port of the stepper motor drive module. As a still further scheme of the invention, the stepping motor driving module comprises a chip U2, the type of the chip U2 is NSD8389 of a nano-core microelectronic, pins 11, 13, 15, 16 and 17 of the chip U2 are connected with the first end of the ECU control module, pins 18, 19, 20 and 21 of the chip U2 are respectively connected with the first end of the ECU control module through a resistor, pins 3, 4, 5 and 6 of the chip U2 are connected with an interface J2, and the interface J2 is externally connected with a stepping motor. The automobile safety belt winder control system further comprises a storage module and a storage module, wherein the storage module is used for storing system parameters and fault records, a bidirectional input/output port of the storage module is connected with a second end of the ECU control module, and the storage module is also integrated on a circuit board integrated by the ECU control module and the stepping motor driving module. As a still further scheme of the invention, the memory module comprises a chip U3, the model of the chip U3 is that SCL and SDA pins of the chip U3 are connected with a second end of the ECU control module. The automobile safety belt winder control system further comprises a power supply input module, wherein the power supply input module is used for processing an input power supply, realizing reverse connection protection, surge protection and impurity signal filtering, supplying power to the ECU control module and reducing power consumption in a system dormant state, and a bidirectional input/output port of the power supply input