Integrated controller of automobile tailboard

Abstract

According to the integrated controller of the automobile tailboard, the micro-control unit is used for receiving a control signal, intelligently processing the control signal and transmitting the control signal to the output unit; the man-machine interaction unit performs operation control through a button and outputs an execution control command to the micro-control unit; the output unit receives the instruction processed by the micro-control unit and executes the action of the corresponding instruction; the Bluetooth communication unit is connected with the micro-control unit and is used for transmitting wireless data; the data communication unit is connected with the micro-control unit to realize wired data communication; the audio unit receives a signal of the micro-control unit, carries out sound synthesis and then sends out a corresponding voice prompt; the power conversion unit converts voltage to provide power. Intelligent processing, multi-mode communication, man-machine interaction optimization, real-time voice feedback and stable power supply of control signals are achieved, the automobile tailboard control system which is easy and convenient to operate, rapid in response, safe and reliable is provided, and user experience and operation efficiency are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile tailgate control technology, in particular to an integrated controller for an automobile tailgate. Background Art

[0002] Traditional automobile tailgate controllers usually adopt basic wire control and remote control methods, which have advantages in terms of cost. Due to mature technology, traditional controllers show high stability and reliability in performance. At the same time, the operation methods using button switches and remote controls are intuitive and easy to understand, facilitating operators to quickly master.

[0003] However, traditional automobile tailgate controllers do not have intelligent processing capabilities, cannot efficiently process complex operation signals, lack travel limit protection and warning prompts during operation, increasing operation risks. At the same time, button control and the remote control cannot achieve real-time interaction of status information, resulting in operation conflicts or misoperations.

[0004] Chinese Patent CN219618978U discloses an automobile tailgate controller, including: a control circuit for sending automobile tailgate lifting instructions to control the lifting of the automobile tailgate; an RS485 communication circuit connected to the control circuit for data communication with a handle; the control circuit is connected to an alarm circuit for alarming when the automobile tailgate is lifted; a display circuit for displaying the current working state; this patent can prevent mutual operations and their respective states after accessing the power supply, effectively protect against injury to people and objects, foot control protection, effectively protect the motor from overloading and overworking, with stable and reliable performance, and greatly improve the safety protection of people / objects.

[0005] However, the above patent has limitations in power management, cannot adapt to power input in a wide voltage range, and cannot provide a charging function for external devices; at the same time, it lacks modern communication support, restricting the ability of remote control and device-to-device communication, and fails to provide sufficient user interaction feedback, such as sound prompts, reducing the intuitiveness and convenience of operation.

[0006] However, in the existing publicly disclosed technologies, automobile tailgate controllers still have the above obvious deficiencies, and at the same time cannot effectively process control signals from multiple input sources, lacking an efficient signal integration and processing mechanism.

[0007] To solve the above problems, the utility model provides an integrated controller for an automobile tailgate, which not only includes a micro-control unit, a human-machine interaction unit, an output unit, a Bluetooth communication unit, a data communication unit, an audio unit, and a power conversion unit, but also realizes efficient and safe control of the automobile tailgate through a DC / DC circuit with a wide voltage range and a newly added Bluetooth module technical solution. Summary of the Utility Model

[0008] An integrated controller for a vehicle tailgate, comprising:

[0009] A microcontrol unit: The microcontrol unit is used to receive control signals, intelligently process the control signals, and convey them to the output unit;

[0010] A human-machine interaction unit: The human-machine interaction unit is operated and controlled through buttons, and outputs execution control commands to the microcontrol unit;

[0011] An output unit: The output unit receives the instructions processed by the microcontrol unit and executes the actions corresponding to the instructions;

[0012] A Bluetooth communication unit: The Bluetooth communication unit is connected to the microcontrol unit and is used for wireless data transmission;

[0013] A data communication unit: The data communication unit is connected to the microcontrol unit to achieve wired data communication;

[0014] An audio unit: Receives signals from the microcontrol unit, performs sound synthesis, and issues corresponding voice prompts;

[0015] A power conversion unit: Converts voltage to provide power.

[0016] Preferably, the microcontrol unit includes:

[0017] A control chip U1, which executes program instructions and processes input and output signals;

[0018] A resistor R1 for current limiting;

[0019] A resistor R2 is a pull-down resistor;

[0020] A resistor R3 for current limiting protection of signals;

[0021] A resistor R5 for current limiting;

[0022] Resistors R22 and R23 for providing impedance matching;

[0023] A capacitor C1 is a power supply filter capacitor to stabilize the power supply voltage;

[0024] Capacitors C2 and C3 are decoupling capacitors;

[0025] Capacitors C5 and C7 are filter capacitors.

[0026] Preferably, the human-machine interaction unit includes:

[0027] The U7, U8, U9, and U10 include diodes and triodes;

[0028] U7 is an upper footrest processing module for human-machine interaction functions;

[0029] U8 is the lower footrest processing module for the human - machine interaction function;

[0030] U9 and U10 are the limit switch processing modules for the human - machine interaction function;

[0031] Resistors R31, R32, R33, R34, and R35 are pull - down resistors;

[0032] Resistor R36 is used for current limiting;

[0033] Resistor R37 is used for the load;

[0034] Resistors R38, R39, and R40 are used for current - limiting matching;

[0035] Resistors R41, R43, R45, and R47 are used for impedance matching;

[0036] Resistors R42, R44, R46, and R48 are load resistors;

[0037] Transistor Q5 is used to prevent reverse - current damage to the circuit;

[0038] Transistor Q6 is used to drive high - power loads;

[0039] Fuse F3 prevents the power line from being overloaded.

[0040] Preferably, the output unit includes:

[0041] Diodes D2, D3, D4, and D5 are used for unidirectional current flow;

[0042] Resistors R9 and R10 are pull - up resistors;

[0043] Resistors R12, R13, R20, and R21 are current - limiting resistors;

[0044] Resistors R14 and R16 are voltage - dividing resistors;

[0045] Resistors R24, R26, R27, and R28 are used for impedance matching;

[0046] Transistors Q1, Q2, Q3, and Q4 are used to control the on - off of a relatively large current; Fuse F2 prevents the circuit from being damaged due to overload;

[0047] Capacitors C12, C20, C21, and C22 are used for power supply filtering.

[0048] Preferably, the Bluetooth communication unit includes:

[0049] Chip U2 realizes the wireless connection and communication between the host and external devices;

[0050] Capacitor C6 is used for power supply filtering;

[0051] The resistors R6 and R7 are used to limit the current;

[0052] The indicator lights LED1 and LED2 are used to indicate the working state of the Bluetooth module. Preferably, the data communication unit includes:

[0053] The chip U6 is used for data transmission and reception;

[0054] The capacitor C16 is used for power supply filtering;

[0055] The capacitor C17 is used for decoupling;

[0056] The resistors R15 and R25 are pull-down resistors;

[0057] The resistors R17 and R19 are used for current-limiting matching;

[0058] The resistor R18 is used for impedance matching;

[0059] The diodes D6 and D7 are protection diodes, used to withstand high voltage transients. Preferably, the audio unit includes:

[0060] The audio processing chip U3 is used for amplification, processing and output of audio signals; the audio power amplifier chip U4 is used to drive external audio devices;

[0061] The capacitor C11 is a decoupling capacitor;

[0062] The capacitor C13 is used for high-frequency filtering of audio signals;

[0063] The capacitors C14 and C15 are power supply filtering capacitors;

[0064] The capacitor C19 is used for feedback filtering;

[0065] The resistor R11 is a voltage-dividing resistor;

[0066] The resistor R30 is used for current limiting;

[0067] The resistor R29 is used to form an RC network with the capacitor C13;

[0068] The speaker LS1 converts the electrical signal into sound.

[0069] Preferably, the power conversion unit includes:

[0070] The power management chip U5 is responsible for power conversion, distribution and monitoring;

[0071] The voltage regulator V1 is used to provide a stable voltage output;

[0072] The capacitor C1 is used as a power input filtering capacitor;

[0073] Capacitors C4, C8, and C10 are used for filtering at the power output terminal;

[0074] Capacitor C9 is used for filtering power energy storage;

[0075] Transformer E1 stores power energy;

[0076] Inductor L1 is used for power conversion;

[0077] Fuse F1 is an overcurrent protection component;

[0078] Capacitor E2 is a large-capacity filtering capacitor for power input.

[0079] The integrated controller of the present utility model receives signals from the keypad, external handle, Bluetooth module, and foot switch through the micro-control unit, and after intelligent processing, controls the external output module to output corresponding actions, such as rising, falling, flipping, etc. At the same time, the audio module outputs corresponding sound prompts, making it more convenient for the operator to use.

[0080] The integrated controller of the present utility model also expands the original wired connection usage mode and scope. Through the newly added Bluetooth module, the operator can use the device more flexibly and reasonably. During device operation, the micro-control unit controls the sound synthesis chip of the audio module to be amplified by the audio power amplifier chip to drive the speaker to emit corresponding sound prompts, further improving the intuitiveness and safety of operation.

[0081] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of this application more obvious and understandable, the following takes the preferred embodiments of this application and combines with the drawings to describe in detail as follows.

[0082] According to the following detailed description of the specific embodiments of this application in combination with the drawings, those skilled in the art will be more clear about the above and other purposes, advantages, and features of this application. Description of the Drawings

[0083] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual ratio.

[0084] Figure 1 It is the circuit diagram of the micro of the present utility model;

[0085] Figure 2 This is the circuit diagram of the micro - control unit of the present utility model;

[0086] Figure 3 This is the circuit diagram of the human - machine interaction unit of the present utility model;

[0087] Figure 4 This is the circuit diagram of the output unit of the present utility model;

[0088] Figure 5 This is the circuit diagram of the Bluetooth communication unit of the present utility model;

[0089] Figure 6 This is the circuit diagram of the data communication unit of the present utility model;

[0090] Figure 7 This is the circuit diagram of the audio unit of the present utility model;

[0091] Figure 8 This is the circuit diagram of the power conversion unit of the present utility model; Specific embodiments

[0092] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. In the following description, specific details such as specific configurations and components are provided only to assist in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, descriptions of known functions and structures are omitted for clarity and conciseness.

[0093] It should be understood that the "one embodiment" or "this embodiment" mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, the "one embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0094] In addition, this application may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or arrangements discussed.

[0095] In this text, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, B exists alone, and both A and B exist simultaneously. The term " / and" in this text describes another relationship between associated objects, indicating that there can be two relationships. For example, A / and B can represent: A exists alone, and both A and B exist. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0096] The term "at least one" in this text is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, at least one of A and B can represent: A exists alone, both A and B exist simultaneously, and B exists alone.

[0097] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion.

[0098] Embodiment 1

[0099] This embodiment mainly combines with the attached Figure 1 as shown to elaborate on the integrated controller of the vehicle tailgate in detail:

[0100] An integrated controller of a vehicle tailgate includes the following parts:

[0101] Microcontroller unit: As the core of the controller, the microcontroller unit is configured with a main control chip U1, which is responsible for receiving and processing control signals from the human-machine interaction unit, as well as data inputs from the Bluetooth communication unit and the data communication unit; the microcontroller unit processes these signals through internal intelligent algorithms and generates corresponding instructions to be conveyed to the output unit to achieve precise control of the tailgate;

[0102] Human-machine interaction unit: This unit includes input devices such as a keypad and a foot switch. Through button operations, the operator can output execution control commands to the microcontroller unit, and these control commands include but are not limited to action instructions such as rising, falling, and flipping;

[0103] Output unit: Receives the instructions processed by the microcontroller unit and executes the actions corresponding to the instructions. This unit includes a power drive module and a relay, which are used to control the mechanical actions of the tailgate, such as rising, falling, and flipping;

[0104] Bluetooth communication unit: This unit is configured with a Bluetooth module U2, which is wirelessly connected to the micro - control unit and used for wireless data transmission to achieve wireless communication and control with external devices;

[0105] Data communication unit: This unit is connected to the micro - control unit through a CAN bus interface to achieve wired data communication. It is configured with a MAX485 communication chip U6, which is responsible for data transmission and reception;

[0106] Audio unit: This unit includes an audio processing chip U3 and an audio power amplifier chip U4. After receiving the signal from the micro - control unit, it performs sound synthesis and emits corresponding voice prompts through a speaker LS1 to assist the operator in more intuitively understanding the current operation status;

[0107] Power conversion unit: This unit is configured with a power management chip U5 and corresponding voltage - stabilizing and filtering circuits, which are responsible for converting the wide voltage range of the vehicle battery (such as 12V, 24V, etc.) into 5V and 3.3V power supplies suitable for the low - power modules on the main board, providing power to the entire control system, and can also charge an external handle.

[0108] Specifically, as Figure 2 shown, the micro - control unit includes the following components and their functions:

[0109] Control chip U1, which is the core of the micro - control unit and is used to execute program instructions and process various input and output signals;

[0110] Resistor R1, which is used to provide a stable reference voltage for the main control chip U1 and limit the current;

[0111] Resistor R2, which acts as a pull - down resistor to ensure the stability of the circuit in a specific state;

[0112] Resistor R3, which is used on a specific I / O port of the micro - control unit to perform signal current - limiting protection;

[0113] Resistor R5, which is also used for current limiting to ensure signal stability and circuit safety;

[0114] Resistors R22 and R23, which are used for the communication interface of the micro - control unit to provide impedance matching and signal shaping, enhancing communication reliability;

[0115] Capacitor C1, which is usually used as a power supply filtering capacitor to stabilize the power supply voltage and reduce noise;

[0116] Capacitor C2, which acts as a decoupling capacitor and is used on the power supply line of the micro - control unit to filter out high - frequency noise;

[0117] Capacitor C3, which is used for the analog or digital circuit part of the micro - control unit to perform signal coupling or filtering;

[0118] Capacitor C5, as a filtering capacitor for power supply or signal line, is used to improve power quality or signal integrity;

[0119] Capacitor C7 is usually used in the power management or voltage regulation circuit of the microcontroller unit to improve power stability and system reliability.

[0120] Specifically, as Figure 3 shown, the human-machine interaction unit includes the following components and their functions:

[0121] U7, U8, U9, and U10 contain diodes and triodes, acting as auxiliary processors or interface controllers of the microcontroller unit, used to enhance system processing capabilities or manage different human-machine interaction functions;

[0122] U7 is the upper foot pedal processing module for human-machine interaction functions;

[0123] U8 is the lower foot pedal processing module for human-machine interaction functions;

[0124] U9 and U10 are the limit switch processing modules for human-machine interaction functions;

[0125] Resistors R31 to R35 are used on the I / O ports of the microcontroller unit and are pull-down resistors to ensure the stability of input signals;

[0126] Resistors R36, R38, R39, and R40 are used on the I / O ports of the microcontroller unit to limit current or improve the anti-interference ability of signals;

[0127] Resistor R37 is used for the key input of the keypad to provide a stable trigger signal and ensure the accuracy of key operations;

[0128] Resistors R41, R43, R45, and R47 are used for the communication interface of the microcontroller unit to provide impedance matching and enhance the reliability of data transmission;

[0129] Resistors R42, R44, R46, and R48 are load resistors used for power management and signal loading to improve power stability and signal quality;

[0130] The triode Q5 is of the MMBT3904 model and is used for signal rectification or direction control of key input to prevent reverse current from damaging the circuit;

[0131] The triode Q6 is of the MMBT3906 model and is used for rectification or switching of high-current signals to drive high-power loads;

[0132] The fuse F3, with the model MSMD200-20V, serves as a power protection component to prevent power line overload.

[0133] Specifically, as Figure 4As shown, the output unit includes the following components and their functions:

[0134] Diodes D2, D3, D4, D5 are used for rectification or signal direction control to ensure unidirectional current flow, improving the stability and efficiency of the circuit;

[0135] Resistors R9, R10 are pull-up resistors that provide a stable voltage reference to ensure the correctness of the signal logic state;

[0136] Resistors R12, R13, R20, R21 are used for current limiting and protecting the subsequent circuit to prevent damage caused by excessive current;

[0137] Resistors R14, R16 are used for the I / O ports of the microcontroller unit to provide signal voltage division and current limiting, ensuring the stability and security of signal transmission;

[0138] Resistors R24, R26, R27, R28 are used for signal conditioning and impedance matching in the output unit to optimize signal quality and system performance;

[0139] Transistors Q1, Q2, Q3, Q4, model SS8050, are used as switching elements to control the on / off of a larger current, realizing the control of external loads;

[0140] Fuse F2, model MSMD200 - 20V, is used as an overcurrent protection element to prevent the circuit from being damaged due to overload;

[0141] Capacitors C12, C20, C21, C22, all 0.1uF 50V 20%, are used for power supply filtering to reduce power supply noise;

[0142] At the same time, capacitor C12 also has the function of filtering high-frequency noise to ensure signal clarity and system stability.

[0143] Specifically, as Figure 5 shown, the Bluetooth communication unit includes the following components and their functions:

[0144] Chip U2, model DX - BT24, is used as a Bluetooth communication module, responsible for wireless data transmission and reception, realizing wireless connection and communication between the host and external devices;

[0145] Capacitor C6, labeled 0.1uF 10V 20%, is used for power supply filtering to reduce power supply noise and ensure stable power supply for the Bluetooth module;

[0146] Resistors R6 and R7, both 220R 5%, are used to limit the current of the I / O ports of the Bluetooth module or as signal matching resistors to optimize communication performance;

[0147] Indicator LEDs LED1 and LED2 are used to indicate the working status of the Bluetooth module;

[0148] Specifically, as Figure 6 shown, the data communication unit includes the following components and their functions:

[0149] Chip U6, model number MAX485ESA-SOP8, serves as an RS-485 communication interface chip for serial transmission and reception of data on a multi-point communication network;

[0150] Capacitor C16, with a value of 10uF 10V 20%, is used for power filtering to ensure the stability of the power supply line and reduce the impact of voltage spikes on the communication module;

[0151] Capacitor C17, with a value of 0.1uF 10V 20%, is used for decoupling to reduce power supply noise and improve the stability of the communication module;

[0152] Resistors R15 and R25, both with a value of 10K 5%, are used for pull-down configuration to ensure the stable state of the communication line when there is no signal;

[0153] Resistors R17 and R19, both with a value of 22R 5%, are used to limit the current on the CAN bus to protect the communication line and equipment from electrical damage;

[0154] Resistor R18, labeled as 22R 5%, is used as the termination resistor for the RS-485 communication line to match the line characteristic impedance and optimize signal integrity;

[0155] Diodes D6 and D7, model number SMAJ6.0CA, serve as protection diodes to withstand high voltage transients and protect the communication line and integrated circuit U6 from electrostatic discharge and electrical interference damage.

[0156] Specifically, as Figure 7 shown, the audio unit includes the following components and their functions:

[0157] Audio processing chip U3, model number SC8065B, serves as an audio processing chip responsible for amplifying, processing, and outputting audio signals;

[0158] Audio power amplifier chip U4, model number PAM8303, serves as an audio power amplifier to provide sufficient current driving ability to drive external speakers or audio devices;

[0159] Capacitor C11, labeled as 0.1uF 10V 20%, is used as a power supply decoupling capacitor to reduce power supply noise and ensure a stable power supply for the audio amplifier;

[0160] Capacitor C13, rated at 0.01uF 50V 20%, is used for high-frequency filtering of audio signals to eliminate noise and interference in the audio output;

[0161] Capacitors C14 and C15, both 22uF 10V 20%, are used as power supply filter capacitors to smooth the power line fluctuations and improve the stability and quality of the audio output;

[0162] Capacitor C19, rated at 0.01uF 50V 20%, is used in the feedback network of the audio amplifier to stabilize the gain or improve the frequency response;

[0163] Resistor R11, rated at 10K 5%, is used to set the gain of integrated circuit U3 or as part of a voltage divider to adjust the level of the input signal;

[0164] Resistor R30, rated at 150K 5%, is used to set the gain of the feedback network or for volume control;

[0165] Resistor R29, rated at 150K 5%, is used to form an RC network with capacitor C13 to adjust the cut-off frequency of the audio signal;

[0166] Speaker LS1, as an audio output device, converts the electrical signal into sound for the audio experience at the user end.

[0167] Specifically, as Figure 8 shown, the power conversion unit includes the following components and their functions:

[0168] Power management U5, model TD1509, as a power management chip, is responsible for power conversion, distribution, and monitoring to ensure the system obtains stable and appropriate voltage;

[0169] Voltage regulator V1, model AMS1117-3V3, is used to provide a stable 3.3V output for the low-voltage circuits inside the system;

[0170] Capacitor C1, rated at 0.1uF 10V 20%, is used as a power input filter capacitor to reduce power noise and voltage fluctuations;

[0171] Capacitor C4, also rated at 0.1uF 10V 20%, is used for filtering at the power output end to improve the stability of the power output;

[0172] Capacitor C8, rated at 1uF 10V 20%, is used for power output filtering to smooth the power line fluctuations and provide a stable power supply;

[0173] Capacitor C9, rated at 10uF 10V 20%, is used for power energy storage and filtering to help stabilize the power output during load changes;

[0174] Capacitor C10, rated at 0.1 uF 10V 20%, is used for high-frequency noise filtering at the power output terminal to improve power quality;

[0175] Transformer E1, rated at 330 uF / 25V, serves as a power storage element for the power supply, used to smooth the power output or as part of the power conversion;

[0176] Inductor L1, rated at 33 uH / 2.5A, is used in the power conversion circuit and works with E1 to achieve step-up and step-down voltage conversion;

[0177] Fuse F1, model MSMD200 - 8V 1A, serves as an overcurrent protection element to prevent power line overload;

[0178] Capacitor E2, rated at 470 uF / 35V, serves as a large-capacity filter capacitor for the power input to ensure stable power input.

[0179] Through the integrated micro-control unit, human-machine interaction unit, output unit, Bluetooth communication unit, data communication unit, audio unit, and power conversion unit, the above embodiments achieve precise control and intelligent operation of the vehicle tailgate, providing a highly stable, safe, and reliable integrated control system for the vehicle tailgate, with excellent user interaction experience and efficient data processing capabilities, while ensuring a wide voltage range of application and power management efficiency for the system.

[0180] Embodiment 2

[0181] This embodiment is based on Embodiment 1 and mainly introduces how the human-machine interaction unit, output unit, Bluetooth communication unit, data communication unit, audio unit, and power conversion unit are connected in detail to the micro-control unit.

[0182] Specifically, as Figure 2 and Figure 3 shown, the connection between the micro-control unit and the keypad and external wiring is mainly achieved through digital input pins, and the pins read signals from the keypad and external wiring;

[0183] The micro-control unit has multiple pins for connecting the keypad and external wiring, pins PB0 to PB15, PA0 to PA15, and these pins can be configured in input mode to read the key status.

[0184] In the circuit, resistors R3, R4, R31, and R32 play a role in current limiting to prevent excessive current from flowing into the pins of the micro-control unit, causing damage; in addition, resistors R14, R19, etc. are used for current-limiting matching of signals to ensure stable signal transmission.

[0185] Limit switches 1 and 2 are used to detect physical limit positions and are usually associated with a keypad or external wiring to provide additional input signals to the microcontroller unit.

[0186] The foot switch is connected to the microcontroller unit through the Header11 interface and can provide additional input control to control up, down, or mode switching.

[0187] Specifically, as Figure 2 and Figure 4 shown, relays Relay1, Relay2, Relay3, Relay4 are used to control high-power loads. Relay-SPST is responsible for the switching circuit. The microcontroller unit controls the on / off states of these relays through its pins. Transistors Q1, Q2, Q3, Q4 are used as drivers for the relays. When the corresponding pins of the microcontroller unit output a high level, the transistors conduct, thus activating the relays.

[0188] Transistors Q1, Q3, Q4, Q6 are used as switching elements in the circuit to control the on / off of the current. The bases of these transistors are usually connected to the pins of the microcontroller unit. When the microcontroller unit outputs an appropriate control signal, the transistors conduct or cut off, thus controlling the circuit connected between their collectors and emitters.

[0189] Specifically, as Figure 2 and Figure 5 shown, the Bluetooth module is used to implement the wireless communication function. The Bluetooth module is an independent chip or module, and it exchanges data with the microcontroller unit through the UART interface.

[0190] The microcontroller unit communicates with the Bluetooth module through its UART interface to send and receive data between two devices. The TX (transmit) and RX (receive) pins of the microcontroller unit are connected to the corresponding pins of the Bluetooth module to form a two-way communication link.

[0191] BT-TX: This is the transmit pin of the Bluetooth module and is used to send data to the microcontroller unit.

[0192] BT-RX: This is the receive pin of the Bluetooth module and is used to receive data from the microcontroller unit.

[0193] Correspondingly, on the microcontroller unit there are:

[0194] CAN_UART-TX: The transmit pin of the microcontroller unit and is used to send data to the Bluetooth module.

[0195] CAN_UART-RX: The receive pin of the microcontroller unit and is used to receive data from the Bluetooth module.

[0196] In the Bluetooth communication circuit, resistors R3 and R5 are used for current limiting to protect the UART interfaces of the Bluetooth module and the microcontroller unit from excessive current impact. Resistor R5 is connected between the receive pin BT-RX of the Bluetooth module and GND (ground), and resistor R3 is connected between the transmit pin BT-TX of the Bluetooth module and VDD3V3 (power supply). These two resistors, acting as pull-down and pull-up resistors, contribute to signal stability.

[0197] Specifically, as Figure 2 and Figure 6 shown, in the circuit diagram, the CAN transceiver of the data communication unit is implemented by the MAX485ESA-SOP8 chip U6. It is a key component for CAN bus communication, responsible for converting the differential signals of the microcontroller unit into signals suitable for long-distance transmission on the CAN bus, and at the same time, it can also convert the received signals back into a form that the microcontroller unit can understand.

[0198] The CAN interface of the microcontroller unit usually includes two pins, corresponding to CAN_H and CAN_L respectively, which are the two signal lines of the CAN bus, on the HK32F030C6T6-LQFP48 microcontroller unit;

[0199] A 22-ohm resistor R18 is used in the circuit to limit the current on the CAN bus, which is very important for protecting the CAN transceiver and the CAN pins of the microcontroller unit, preventing damage caused by excessive current.

[0200] The protection diodes SMAJ6.0CA (D6, D7) are transient voltage suppression diodes, used to protect the CAN bus from electrostatic discharge and voltage surges, ensuring the stability and reliability of CAN communication.

[0201] Filtering capacitors: Capacitors C16 and C17 (0.1uF) are used for signal filtering of the CAN bus, reducing the noise on the signal line and improving the signal quality.

[0202] CAN_H and CAN_L are the two signal lines of the CAN bus, which are respectively connected to the A and B pins of the CAN transceiver. CAN_H represents the high-signal line of the CAN bus, while CAN_L represents the low-signal line.

[0203] Specifically, as Figure 2 and Figure 7 shown, the audio part in the circuit diagram uses the PAM8303 chip (U4) as an audio amplifier. This chip is responsible for amplifying the audio signals from the microcontroller unit to drive audio output devices such as speakers or headphones.

[0204] Microcontroller unit audio output pins: The microcontroller unit has dedicated pins for outputting audio signals, and these pins output audio information through PWM (Pulse Width Modulation) signals. On the HK32F030C6T6-LQFP48 microcontroller unit, the PWM signals are usually provided by dedicated general-purpose input / output pins, which are configured in PWM output mode.

[0205] PWM1 and PWM2 (IO1 / RET and OKY / DATA) are the pins on the microcontroller unit for outputting audio signals, and they carry audio information through PWM signals. These signals are sent to the audio amplifier for amplification.

[0206] Audio amplifier input: The input end of the audio amplifier usually needs to convert the PWM signal of the microcontroller unit into an analog audio signal. On the PAM8303 chip, the IN-IN+ and IN- pins are used to receive the audio signal from the microcontroller unit, and the SD pin is used to control the mute or power-saving mode of the amplifier.

[0207] LS1 represents the speaker, which is connected to the output end of the audio amplifier through the OUT+ and OUT- pins. After the audio amplifier amplifies the audio signal from the microcontroller unit, it drives the speaker to emit sound through these pins.

[0208] The circuit also includes R11 and capacitor C19, which are used for current limiting and filtering to ensure the quality and stability of the audio signal, and at the same time protect the audio amplifier and the speaker from excessive current impact.

[0209] Specifically, as Figure 2 and Figure 8 shown, the external power supply enters the system through the VDD5V pin, which is the main power input point of the entire circuit. The power supply circuit will convert and regulate this input voltage into a voltage suitable for the microcontroller unit and other electronic components to use.

[0210] The power management chip U5 (TD1059), as a power management chip, is used for voltage regulation and power conversion to ensure that the microcontroller unit and other components obtain a stable operating voltage. VDD5V is input through the 1 pin of U5, and after internal voltage regulation processing, it is provided to the circuits of various voltage levels required in the system.

[0211] The fuse F1, as a safety device, is used to protect the motherboard circuit and avoid damage caused by overcurrent. When the current exceeds the set threshold, the fuse will blow and cut off the circuit to protect the system from damage.

[0212] The current-limiting resistor R2 is used to limit the current to prevent excessive current in the circuit from causing damage. R2 is connected in series with the inductor L1 to the 3 pin of U5 to control the current flowing into the microcontroller unit.

[0213] L1 is used to smooth the current. When it is connected in series with R2, it can help suppress sudden changes in current and ensure the stability of the power supply.

[0214] Filter capacitors C8 and C10 are used for filtering to eliminate power supply noise and ensure that the microcontroller unit and other sensitive circuits obtain clean direct current. The capacitors can absorb voltage fluctuations in the power supply and provide a more stable voltage output.

[0215] The power supply pin of the microcontroller unit is connected to the power management circuit to obtain a regulated 3.3V power supply. The normal operation of the microcontroller unit requires a stable voltage supply, and VDD3V3 is designed for this purpose.

[0216] The "OUTPUT" interface on the circuit diagram is an output port for connecting external devices. It is directly connected to the GPIO pins of the microcontroller unit and is also connected to the microcontroller unit through some intermediate circuits such as transistors and relays to provide higher driving ability or isolate the main circuit from the external circuit.

[0217] Capacitor C9 is used for filtering to reduce noise in signal transmission and improve communication quality.

[0218] The Bluetooth module requires a stable power supply and a good ground to work properly. In the circuit diagram, VDD3V3 provides the necessary power supply voltage, and GND is the ground pin to ensure the normal operation of the circuit.

[0219] Through the above circuits and components, the microcontroller unit can receive signals from the keypad and external wiring, including but not limited to key states, limit switch states, foot switch states, etc., and thus execute corresponding control logic. At the same time, the microcontroller unit can also feedback the system status through the indicator lights to enhance the human-machine interaction experience. All these signals are read through the pins, and the microcontroller unit is responsible for processing these signals and making responses.

[0220] The above are only the preferred embodiments of the present invention, and it does not limit the protection scope of the present invention. For those skilled in the art, the present invention can have various changes and modifications. All changes, modifications, substitutions, integrations, and parameter changes made within the spirit and principle of the present invention by means of conventional substitutions or the ability to achieve the same functions without departing from the principle and spirit of the present invention fall within the protection scope of the present invention.

Claims

1. An integrated controller for a car tailgate, characterized in that: include: Microcontrol unit: The microcontrol unit is used to receive control signals, and transmit the control signals to the output unit after intelligent processing; Human-computer interaction unit: The human-computer interaction unit performs operation control through buttons and outputs execution control commands to the microcontroller unit; Output unit: The output unit receives the instructions processed by the microcontroller unit and executes the actions of the corresponding instructions; Bluetooth communication unit: the Bluetooth communication unit is connected to the micro control unit for wireless data transmission; Data communication unit: the data communication unit is connected to the micro control unit to realize wired data communication; Audio unit: receives signals from the microcontroller unit, synthesizes the sound and issues corresponding voice prompts; Power conversion unit: converts voltage to provide power.

2. The integrated controller of a car tailgate according to claim 1, characterized in that: The micro control unit comprises: Control chip U1, executes program instructions and processes input and output signals; Resistor R1 limits the current; Resistor R2 is a pull-down resistor; Resistor R3 performs current limiting protection for the signal; Resistor R5 is used for current limiting; Resistors R22 and R23 provide impedance matching; Capacitor C1 is a power supply filter capacitor to stabilize the power supply voltage; Capacitors C2 and C3 are decoupling capacitors; Capacitors C5 and C7 are filter capacitors.

3. The integrated controller of a car tailgate according to claim 1, characterized in that: The human-computer interaction unit comprises: U7, U8, U9, and U10 include diodes and transistors; U7 is the upper pedal processing module for human-computer interaction function; U8 is a foot pedal processing module for human-computer interaction function; U9 and U10 are limit switch processing modules for human-computer interaction functions; Resistors R31, R32, R33, R34, and R35 are pull-down resistors; Resistor R36 is used for current limiting; Resistor R37 is used for load; The resistors R38, R39, and R40 are used for current limiting matching; Resistors R41, R43, R45, and R47 are used for impedance matching; Resistors R42, R44, R46, and R48 are load resistors; Transistor Q5 is used to prevent reverse current from damaging the circuit; Transistor Q6 is used to drive high-power loads; Fuse F3 protects the power supply line from overload.

4. The integrated controller of a car tailgate according to claim 1, characterized in that: The output unit comprises: Diodes D2, D3, D4, and D5 are used for unidirectional current flow; Resistors R9 and R10 are pull-up resistors; Resistors R12, R13, R20, and R21 are current limiting resistors; Resistors R14 and R16 are voltage-dividing resistors; Resistors R24, R26, R27, and R28 are used for impedance matching; Transistors Q1, Q2, Q3, and Q4 are used to control the on and off of current; Fuse F2 prevents the circuit from being damaged due to overload; Capacitors C12, C20, C21, and C22 are used for power supply filtering.

5. The integrated controller of a car tailgate according to claim 1, characterized in that: The Bluetooth communication unit comprises: Chip U2 realizes wireless connection and communication between the host and external devices; Capacitor C6 is used for power supply filtering; Resistors R6 and R7 are used to limit the current; Indicator lights LED1 and LED2 are used to indicate the working status of the Bluetooth module.

6. The integrated controller of a car tailgate according to claim 1, characterized in that: The data communication unit comprises: Chip U6 is used for data transmission and reception; Capacitor C16 is used for power supply filtering; Capacitor C17 is used for decoupling; Resistors R15 and R25 are pull-down resistors; Resistors R17 and R19 are used for current limiting matching; Resistor R18 is used for impedance matching; Diodes D6 and D7 are protection diodes used to withstand high voltage transients.

7. The integrated controller of a car tailgate according to claim 1, characterized in that: The audio unit comprises: The audio processing chip U3 is used for amplifying, processing and outputting audio signals; The audio power amplifier chip U4 is used to drive external audio equipment; Capacitor C11 is a decoupling capacitor; Capacitor C13 is used for high-frequency filtering of audio signals; Capacitors C14 and C15 are power supply filter capacitors; Capacitor C19 is used for feedback filtering; Resistor R11 is a voltage dividing resistor; Resistor R30 is used for current limiting; Resistor R29 is used to form an RC network with capacitor C13; The speaker LS1 converts the electrical signal into sound.

8. The integrated controller of a car tailgate according to claim 1, characterized in that: The power conversion unit comprises: The power management chip U5 is responsible for power conversion, distribution and monitoring; The voltage regulator V1 is used to provide a stable voltage output; Capacitor C1 is used as power input filter capacitor; Capacitor C4, capacitor C8, and capacitor C10 are used for filtering the output end of the power supply; Capacitor C9 is used for filtering of power supply energy storage; Transformer E1 is used to store power; Inductor L1 is used for power conversion; Fuse F1 is an overcurrent protection element; Capacitor E2 is a large-capacity filter capacitor for the power input.

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