Vehicle logo switching device, vehicle and control method of vehicle logo switching device

Abstract

The invention discloses a vehicle logo switching device, a vehicle and a control method thereof.The vehicle logo switching device comprises an MCU module, an integrated state detection unit, a driving unit and a current detection unit and is used for obtaining a target sensing signal to trigger a target control instruction to drive a motor transmission mechanism to operate a working mode in which a main vehicle logo and an auxiliary vehicle logo are switched mutually; state detection and current detection are carried out on the real-time state and the real-time current in the vehicle logo switching process respectively, and current detection and correction are carried out; the current acquisition module is used for acquiring a real-time current signal generated in a vehicle logo switching process; the motor transmission mechanism is configured to be an execution mechanism which drives the main vehicle logo and the auxiliary vehicle logo to be switched through a motor and is used for executing the switching action between the main vehicle logo and the auxiliary vehicle logo according to the target control instruction; the sensor modules are respectively arranged on the main vehicle logo and the auxiliary vehicle logo and are used for acquiring sensing signals in real time and transmitting the sensing signals to the MCU module; personalized switching of the main vehicle logo and the auxiliary vehicle logo is achieved, potential safety hazards such as false triggering and motor faults are effectively prevented, and stable operation of the device is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle logo switching, and in particular relates to a vehicle logo switching device, a vehicle and a control method thereof. Background Art

[0002] As the most intuitive and representative external logo of a car brand, the car logo is an indispensable part of the car. It not only carries the history and culture of the brand, but also reflects the brand's market positioning and consumer groups. With the continuous development of the automobile market and the intensification of competition, the design and display of the car logo have also become the focus of major automobile manufacturers.

[0003] Initially, most car logos were fixed, that is, once the logo was installed on the car, it could not be replaced or adjusted. This design is simple and low-cost, but lacks flexibility and diversity. In order to further improve the flexibility and diversity of the logo, a logo switching device came into being. The logo switching device allows car owners to quickly switch different logo styles or patterns according to personal preferences or different scene requirements without replacing the entire logo. The emergence of this device has greatly enriched the choice of personalized car decoration. At present, by using multiple motors to control each structure of the logo separately, although the logo can be hidden, the structure and procedure are relatively complex, the reliability is low and the cost of use is high, and there is room for improvement. The logo installed on the vehicle is easily damaged by external forces. When the logo is damaged, the displayed logo needs to be quickly replaced, and the cost of repairing most logos after being damaged is high. In view of this, it is necessary to propose a logo switching device suitable for the scene of rapid logo switching. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a vehicle logo switching device, a vehicle and a control method thereof, which are suitable for the scenario of rapid switching of vehicle logos, realize automatic switching of vehicle logos, and ensure that the device can still operate safely and reliably when encountering various abnormal situations.

[0005] To solve the above problems, the technical solution of the present invention is: The present invention provides a vehicle logo switching device, comprising an MCU module and a current acquisition module, a motor transmission mechanism, a sensor module, and a power supply module electrically connected to the MCU module respectively. The MCU module integrates a state detection unit, a drive unit and a current detection unit, and is used to obtain a target sensor signal, trigger a target control instruction according to the target sensor signal to drive the motor transmission mechanism to operate the working mode of switching between the main vehicle logo and the auxiliary vehicle logo, and at the same time, respectively perform state detection and current detection and correction on the real-time state and real-time current during the vehicle logo switching process; The current acquisition module is connected to the current detection unit and is used to collect the real-time current signal generated during the vehicle logo switching process and feed it back to the MCU module; The motor transmission mechanism is configured as an actuator that drives the main vehicle logo and the auxiliary vehicle logo to switch between each other through the motor drive module, and is used to execute the switching action between the main vehicle logo and the auxiliary vehicle logo according to the target control instruction and feed back the switching state to the MCU module; The sensor modules are respectively arranged on the main vehicle logo and the secondary vehicle logo, and are used to obtain sensor signals in real time and transmit them to the MCU module; The power supply module has one path connected to the driving module and the current acquisition module to the current detection unit, and another path directly connected to the MCU module, and is used to convert the input body power supply voltage into a digital power supply voltage and supply power to each module; Among them, the state detection is the sensor signal or switch command that meets the vehicle logo switching trigger condition.

[0006] Preferably, in the switching mode, when the pressure sensor / touch sensor is triggered by external pressure or by a change in the touch state of the vehicle logo surface, a sensing signal is obtained and fed back to the MCU module, and the MCU module issues a target control instruction to drive the motor transmission mechanism, so that the main vehicle logo located in the center display area of ​​the vehicle is recovered and the secondary vehicle logo is simultaneously displayed in the center display area of ​​the vehicle to realize the rapid switching of the main and secondary vehicle logos; In the detection mode, the real-time status of the vehicle logo switching process is detected. When the pressure sensor / touch sensor is triggered by external pressure or the touch status change of the vehicle logo surface, the touch shutdown command corresponding to the current pressure sensor / touch sensor is identified to effectively prevent false triggering; the real-time current in the vehicle logo switching process is detected to determine whether the real-time current value has abnormal fluctuations during operation to ensure the safety of motor operation and identify abnormalities when the current fluctuates; In abnormal mode, the fault handling mechanism is triggered according to the identified fault signal. When a false touch signal or a pressure signal caused by an external force does not reach the preset intensity threshold to form a false touch signal, the corresponding pressure sensor / touch sensor is diagnosed and calibrated through the MCU module. When a stall state other than a false touch signal is identified, a stop command is issued to the motor and corresponding protection operations are performed. After the stall fault is eliminated, a reset operation is performed to restore the normal working state, and software and hardware self-checks are automatically performed to optimize the operating state.

[0007] Preferably, the motor drive module includes a motor and an H-bridge consisting of a first MOS tube Q1, a second MOS tube Q2, a third MOS tube Q3 and a fourth MOS tube Q4, one end of the motor is connected to the collectors of the first MOS tube Q1 and the fourth MOS tube Q4, and the other end of the motor is connected to the collectors of the second MOS tube Q2 and the third MOS tube Q3, and different operating states of the motor are achieved by controlling the conduction and cutoff of the four MOS tubes.

[0008] Preferably, the power supply module includes a body power supply, an anti-reverse filtering module and a power management module, the output end of the body power supply is connected to the input end of the anti-reverse filtering module, one output end of the anti-reverse filtering module and the input end of the power management module are connected to the MCU module, the other output end of the anti-reverse filtering module is connected to the input end of the driving module, the output end of the driving module is connected to the input end of the current acquisition module, the output end of the current acquisition module is grounded, and is used to output the original power from the body power supply, output the pre-processed power after the anti-reverse, filtering and overvoltage protection processing of the anti-reverse filtering module, and convert the input pre-processed power supply voltage into the target digital power supply voltage through the power supply module, and distribute the target digital power supply voltage to the next level H-bridge and MCU module for power supply.

[0009] As a preference, it also includes a position switch and a recovery switch; The position switch is used to set the preset extreme position of the main logo and the auxiliary logo corresponding to the travel, and is used to detect whether the corresponding logo has reached the target switching position. When the main / auxiliary logo runs to the preset extreme position, the position switch is triggered and the motor stops running; The recovery switch is integrated in the vehicle cab. When the recovery switch is turned on and the position switch is detected to be triggered at the same time, the main vehicle logo returns to the starting position; Among them, the main vehicle logo and the secondary vehicle logo are arranged to be linked with each other so that the switching stroke has the vehicle logo switching state of AB stroke node linkage and BC stroke node linkage. In the first state, the target control instruction is received to drive the main vehicle logo from the starting B stroke node to the C stroke node to recover the main vehicle logo, and the secondary vehicle logo is driven from the A stroke node to the B stroke node to display the secondary vehicle logo; in the second state, the recovery instruction is received to drive the main vehicle logo from the C stroke node to the B stroke node to display the main vehicle logo, and the secondary vehicle logo is driven from the B stroke node to the A stroke node to recover the secondary vehicle logo. The A stroke node is the starting position of the secondary vehicle logo in the non-switching mode, and is located in the vehicle logo recovery area; the B stroke node is the starting position of the main vehicle logo in the non-switching mode and the target position of the secondary vehicle logo in the switching mode, and is located in the center display area of ​​the vehicle; the C stroke node is the target position when the main vehicle logo is recovered in the switching mode, and is located in the vehicle logo recovery area.

[0010] Preferably, the power management module includes any one of a DCDC converter and an LDO regulator.

[0011] The present invention further provides a vehicle, comprising the vehicle logo switching device as described in the embodiment of the present invention, which will not be described in detail here.

[0012] The present invention also provides a control method of the vehicle logo switching device according to the embodiment of the present invention, comprising: Power on and read the calibration data under the current operating status; Return the main and auxiliary vehicle logos to zero position to ensure that the vehicle logos are at the calibrated starting position before switching; Receive target control instructions and determine whether to trigger the pressure sensor / touch sensor; When the pressure sensor / touch sensor is triggered by external pressure or by a change in the touch state of the vehicle logo surface, the pressure sensor / touch sensor is triggered, and the touch shutdown command corresponding to the current pressure sensor / touch sensor is valid; When the current shutdown command is valid, execute the main logo shutdown command, run the motor to drive the main logo to switch, record the travel information of the main logo from the starting position to the target position and read the real-time current data; Determine whether the current switching stroke exceeds the preset extreme stroke to prevent over-travel operation and ensure that the vehicle logo has been completely switched to the target position; When the current switching stroke exceeds the preset extreme stroke, the logo switch in the cab successfully completes the switching operation between the main logo and the auxiliary logo, clears the shutdown command corresponding to the pressure sensor / touch sensor, stops the motor and puts it into standby mode.

[0013] Preferably, the determining whether to trigger the pressure sensor / touch sensor includes: If the pressure sensor / touch sensor is triggered, the shutdown command of the pressure sensor / touch sensor is effective, and the main logo shutdown command is executed through the logo switch in the cab, and the motor drives the main and auxiliary logos to switch, and the travel information of the main and auxiliary logos from the starting position to the target position is recorded and the real-time current data is read; If the pressure sensor / touch sensor is not triggered, it is further determined whether the received main logo closing command is a command issued by the logo switch in the cab to prevent false triggering; If the command is sent by the logo switch in the cab, the motor will also be run to switch the primary and secondary logos; if the command is not sent by the logo switch in the cab, check again whether the pressure sensor shutdown command is valid. If it is valid, the motor will be run to switch the primary and secondary logos. If it is not valid, return to the superior and continue to wait for receiving the target control command and repeat the subsequent judgment logic.

[0014] Preferably, the determining whether the current switching stroke exceeds a preset extreme stroke includes: When the current switching stroke does not exceed the preset extreme stroke distance, the real-time current value obtained during the switching stroke is compared with the preset stall current value to determine whether the motor is in a stall state; If the current real-time current value is greater than the preset stall current value, the motor is in stall state and the fault diagnosis process is started; Further confirm whether the current stall state is a fault. If it is confirmed that the current stall state is a fault, the motor stops and reports the relevant fault information to the ECU, then clears the shutdown command of the pressure sensor and enters the standby state; If it is confirmed that there is no fault or the current current is less than the preset stall current value, it will return to the upper level to continue waiting for receiving the target control command and repeat the subsequent judgment logic; Among them, the faults confirmed as stalled rotor state include over-voltage, under-voltage, over-current, abnormal temperature, stalled rotor caused by foreign objects in the switching stroke, and internal faults.

[0015] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: The vehicle logo switching device provided by the present invention drives the vehicle logo base to perform displacement and rotation operations. During the switching process, the driving component accurately controls the movement of the vehicle logo base according to the received target control instruction, thereby realizing the position switching of the main vehicle logo and the auxiliary vehicle logo in the central display area of ​​the vehicle; the state detection unit, the driving unit and the current detection unit are integrated through the MCU module, so as to realize the comprehensive control of the vehicle logo switching process, simplify the circuit structure, and improve the reliability and stability of the device; the current acquisition module collects the current signal in the vehicle logo switching process in real time, and feeds it back to the MCU module for detection and correction, so as to ensure the safety of the motor operation and improve the accuracy of the vehicle logo switching; the sensor module obtains the sensor signal in real time and transmits it to the MCU module, so that the device can accurately control the switching action of the vehicle logo, and at the same time, the design of the position switch and the recovery switch ensures that the vehicle logo can stop accurately when it reaches the target position, thereby improving the switching accuracy; the power supply module includes the body power supply, the anti-reverse filtering module and the power management module, so as to convert the input body power supply voltage into a stable digital power supply voltage, and provide an efficient and reliable power supply for the device; the motor drive module adopts an H-bridge design, and realizes different operating states of the motor by controlling the conduction and cutoff of four MOS tubes. This modular design facilitates maintenance and upgrades, and improves the scalability of the device. By judging the state change of the pressure sensor / touch sensor to trigger the vehicle logo switch, false triggering is effectively prevented. At the same time, the real-time state is detected in the detection mode, further reducing the possibility of false triggering. When a fault signal is identified, the device can trigger the fault handling mechanism to diagnose and calibrate the pressure sensor / touch sensor to ensure the normal operation of the device.

[0016] The control method of the vehicle logo switching device provided by the present invention first reads the calibration data under the current running state after the vehicle is powered on, and the data includes the initial position and motion parameters of the vehicle logo, etc., so as to provide a basis for the subsequent vehicle logo switching action; resets the main vehicle logo and the auxiliary vehicle logo to zero position, and ensures that the vehicle logo is in the calibrated starting position before the switching action, so as to accurately execute the switching instruction; continuously receives the target control instructions from the MCU module, and these instructions are generated according to different trigger conditions, such as the state change of the pressure sensor / touch sensor, the operation of the vehicle logo switch in the cab, etc.; determines whether the pressure sensor / touch sensor is triggered: after receiving the target control instruction, the device determines whether the pressure sensor / touch sensor is triggered, and if so, enters the next step; otherwise, the device continues to wait for receiving new control instructions; executes the main vehicle logo closing command: when the pressure sensor / touch sensor is triggered, the device executes the main vehicle logo closing command, drives the motor to drive the main vehicle logo to perform the switching operation, records the travel information of the main vehicle logo from the starting position to the target position, and reads the real-time current data to ensure the safety and accuracy of the switching process. The device will monitor the travel of the main logo in real time to determine whether it has reached the preset extreme travel. If it has not exceeded the limit, the device will continue to monitor; if it has exceeded the limit, it means that the main logo has completely switched to the target position. After confirming that the main logo has completely switched to the target position, the device clears the touch shutdown command corresponding to the pressure sensor / touch sensor, stops the motor, and puts the motor in standby mode. At the same time, it reports relevant information to the ECU to complete the entire logo switching operation. Through integrated design, precise control logic, and the coordinated work of multiple sensors and switches, an efficient and reliable logo switching function is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a principle block diagram of a vehicle logo switching device in an embodiment of the present invention; Figure 2 It is a schematic diagram of the display state of the vehicle logo switching device of the present invention; Figure 3 This is a flow chart of the control method of the vehicle logo switching device of the present invention. DETAILED DESCRIPTION

[0018] The following is a further detailed description of a vehicle logo switching device and a control method proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0019] like Figure 1 As shown, the present invention provides a vehicle logo switching device, including an MCU module and a current acquisition module, a motor transmission mechanism, a sensor module, and a power supply module electrically connected to the MCU module respectively. The MCU module integrates a state detection unit, a drive unit and a current detection unit, and is used to obtain a target sensor signal, trigger a target control instruction according to the target sensor signal, drive the motor transmission mechanism to operate the main vehicle logo and the auxiliary vehicle logo to switch between each other, and at the same time, respectively perform state detection and current detection and correction on the real-time state and real-time current during the vehicle logo switching process; wherein, the microcontroller internally integrates state detection, H-bridge drive, and current detection functions, completes state detection of the pressure sensor, recovery switch, and position switch, and realizes the drive of the H-bridge and motor current detection; the current detection unit is used to detect the current size of the motor, and when the detected current value exceeds a certain limit, the operation of the motor is stopped, thereby protecting the circuit.

[0020] The current acquisition module is connected to the current detection unit and is used to collect the real-time current signal generated during the vehicle logo switching process and feed it back to the MCU module; The motor transmission mechanism is configured as an actuator that drives the main vehicle logo and the auxiliary vehicle logo to switch between each other through the motor drive module, and is used to execute the switching action between the main vehicle logo and the auxiliary vehicle logo according to the target control instruction and feed back the switching state to the MCU module; wherein the motor transmission mechanism controls the conduction direction and conduction rate of the H bridge, thereby realizing the forward or reverse operation of the motor, and controlling the motor operation rate; The sensor modules are respectively arranged on the main car logo and the auxiliary car logo, and are used to obtain the sensor signals in real time and transmit them to the MCU module; they can be pressure sensors / touch sensors, which are integrated into the main car logo LOGO. When a hand touch signal is detected on the main car logo LOGO, the drive motor works and switches to the spare or auxiliary car logo LOGO.

[0021] The power supply module has one path connected to the driving module and the current acquisition module to the current detection unit, and another path directly connected to the MCU module, and is used to convert the input vehicle body power supply voltage into a digital power supply voltage and supply power to each module; wherein the status detection is a sensor signal or switch command that meets the vehicle logo switching trigger condition.

[0022] The vehicle logo switching device provided in this embodiment integrates status detection, drive and current detection functions through the MCU module, simplifies the circuit and improves the reliability of the device; the current is monitored in real time by the current acquisition module to ensure the safety of the motor; the sensor module ensures that the vehicle logo is accurately switched; the status detection unit responds to the trigger condition in time to prevent misoperation; the power supply module provides stable voltage to ensure the normal operation of the device and optimize the use of electricity; the sensor signal is quickly responded to to achieve accurate switching between the main and auxiliary vehicle logos, and the current is monitored in real time, which helps to detect and deal with abnormal situations in time and ensure continuous operation of the device. The flat design saves space and is convenient for integrating the control device into the limited space of the vehicle. Sensors and status detection are used to avoid damage caused by malicious destruction or misoperation.

[0023] Specifically, the motor drive module includes a motor and an H-bridge composed of a first MOS tube Q1, a second MOS tube Q2, a third MOS tube Q3 and a fourth MOS tube Q4, which provide forward or reverse operation of the motor, speed control and energy support, one end of the motor is connected to the collector of the first MOS tube Q1 and the fourth MOS tube Q4, and the other end of the motor is connected to the collector of the second MOS tube Q2 and the third MOS tube Q3, and different operating states of the motor are achieved by controlling the conduction and cutoff of the four MOS tubes. The H-bridge can also be composed of four switching elements such as triodes, MOSFETs, etc. The motor is connected to the output end of the H-bridge, that is, connected between two diagonal switching elements, and different operating states of the motor are achieved by controlling the conduction and cutoff of the four switching elements. Taking a DC motor as an example, when Q1 and Q4 are turned on and Q2 and Q3 are turned off, the current returns from the positive pole of the power supply through Q1, the motor, and Q4 to the negative pole of the power supply, and the motor rotates forward; when Q2 and Q3 are turned on and Q1 and Q4 are turned off, the current returns from the positive pole of the power supply through Q2, the motor, and Q3 to the negative pole of the power supply, and the motor reverses. This can achieve forward and reverse rotation and speed adjustment of the motor to meet the needs of different working conditions. Switching elements such as MOSFET or triodes have the characteristics of low conduction voltage drop and high switching frequency, which improves the driving efficiency of the motor. The H-bridge circuit has a simple structure, stable operation, and reduced failure rate. Compared with other complex motor drive solutions, the H-bridge circuit has a low cost and is convenient for large-scale application.

[0024] Specifically, the power supply module includes a body power supply, an anti-reverse filtering module and a power management module. The output end of the body power supply is connected to the input end of the anti-reverse filtering module. One output end of the anti-reverse filtering module and the input end of the power management module are connected to the MCU module. Another output end of the anti-reverse filtering module is connected to the input end of the driving module. The output end of the driving module is connected to the input end of the current acquisition module. The output end of the current acquisition module is grounded and is used to output the original power from the body power supply, output the pre-processed power after the anti-reverse, filtering and overvoltage protection processing of the anti-reverse filtering module, and convert the input pre-processed power supply voltage into a target digital power supply voltage through the power supply module, and distribute the target digital power supply voltage to the next-level H-bridge and MCU module for power supply. Among them, the body power supply is not limited to 12v devices or 24v / 48v devices; the anti-reverse filter module provides anti-reverse protection, filtering protection, and overvoltage protection for the power supply, and the output voltage is used to power the next-level H-bridge and MCU; the input body power supply voltage is converted into a digital power supply voltage to power the MCU and other low-voltage modules; the power management module is not limited to DCDC converters and LDO regulators, nor is it limited to being integrated inside or outside the MCU. The anti-reverse filter module effectively prevents power reverse connection to avoid equipment damage, and provides filtering and overvoltage protection functions. The power management module converts the body power supply into a stable digital power supply voltage to ensure that each part of the device obtains a reliable power supply. The power management module includes any one of the following. The pre-processed power supply is distributed to the H-bridge and MCU modules on demand, which optimizes the use of electricity, improves energy efficiency, reduces the risk of failure caused by power problems, improves the overall safety of the device, can adapt to the power characteristics of different models, and ensures the compatibility and reliability of the device on various vehicles.

[0025] Specifically, the vehicle logo switching device provided in this embodiment further includes a position switch and a recovery switch; The position switch is used to set the preset extreme position of the main logo and the auxiliary logo corresponding to the travel, and is used to detect whether the corresponding logo has reached the target switching position. When the main / auxiliary logo runs to the preset extreme position, the position switch is triggered and the motor stops running. The preset extreme position is the end position that can be run under the switching travel; The recovery switch is integrated in the vehicle cab. When the recovery switch is turned on and the position switch is detected to be triggered at the same time, the main vehicle logo returns to the starting position; In order to achieve fast switching and reduce the time and steps required for switching, the main vehicle logo and the auxiliary vehicle logo are arranged to be linked with each other so that the switching stroke has the vehicle logo switching states of AB stroke node linkage and BC stroke node linkage. In the first state, the target control instruction is received to drive the main vehicle logo to run from the starting B stroke node to the C stroke node to recover the main vehicle logo, and the auxiliary vehicle logo runs from the A stroke node to the B stroke node to display the auxiliary vehicle logo; in the second state, the recovery instruction is received to drive the main vehicle logo to run from the C stroke node to the B stroke node to display the main vehicle logo, and the auxiliary vehicle logo runs from the B stroke node to the A stroke node to recover the auxiliary vehicle logo, and the A stroke node is the auxiliary vehicle logo in the non-switching mode. The A-stroke node is the starting position of the main logo in non-switching mode and the target position of the secondary logo in switching mode, and is located in the center display area of ​​the vehicle, that is, the logo is exposed; the C-stroke node is the target position when the main logo is recovered in switching mode, and is located in the logo recovery area, that is, hidden. The linkage setting ensures the synchronization of the main and secondary logos during the switching process, avoids potential problems or errors caused by asynchrony, and achieves fast switching response efficiency when the logo is touched by external force, realizing efficient and stable logo switching function, which not only improves switching efficiency and system stability, but also optimizes user experience, making the logo switching process smoother and more natural. Figure 2 As shown, the above settings also ensure that the car logo can accurately reach the target position during the switching process, thereby improving the accuracy and reliability of the switching; the main and auxiliary car logos are linked to each other to achieve synchronous switching and recovery, thereby ensuring the integrity and continuity of the display; the recovery switch in the cab makes the operation more convenient and reduces the complexity of the operation; the car logo automatically stops when it reaches the preset position, thereby preventing overshoot or damage and improving the safety of the device; it can adapt to different display needs, and the car logo can be quickly switched and restored through simple instructions.

[0026] In order to achieve fast switching, the principle of this embodiment is: in the switching mode, when the pressure sensor / touch sensor is triggered by external pressure or by the change of the touch state of the vehicle logo surface, the sensing signal is obtained and fed back to the MCU module, and the target control instruction is issued by the MCU module to drive the motor transmission mechanism, and the main vehicle logo located in the central display area of ​​the vehicle is recovered and the secondary vehicle logo is simultaneously displayed in the central display area of ​​the vehicle to achieve the fast switching of the main and secondary vehicle logos; when implemented, one method uses a capacitive touch sensor: when a conductor such as a human finger approaches or touches the surface of the vehicle logo, the electric field distribution between the electrodes inside the sensor will change, thereby causing a change in the capacitance value. If the capacitance value is detected to have a significant change and exceeds the set threshold, it can be judged as a touch operation, thereby triggering the vehicle logo switching instruction. Another method uses a resistive pressure sensor: using a Wheatstone bridge circuit structure, when external pressure acts on the elastic diaphragm of the sensor, the resistance of the strain resistor will change, resulting in an imbalance of the Wheatstone bridge, and the output voltage signal will change accordingly. By measuring the change in the output voltage signal, when the change reaches the set standard, it can be judged that pressure has been detected, thereby determining that external pressure has been received and triggering the corresponding instruction. One method uses pressure-sensitive touch technology: combining a pressure sensor with a touch sensor. When a user touches the car logo, the touch action is first detected by a capacitive sensor, and then the touch force is detected by a pressure sensor. If the force reaches a preset threshold, the car logo switching command is triggered. This technology can provide more accurate operational feedback, avoid false triggering, and achieve rapid switching within 0.5 seconds.

[0027] In this embodiment, judging whether the pressure sensor / touch sensor is triggered due to external pressure or a change in the touch state of the vehicle logo surface is a process that comprehensively considers many factors, which are specifically described as follows: Setting threshold judgment: Setting appropriate thresholds for the pressure sensor and touch sensor respectively. For the pressure sensor, when the detected pressure value exceeds the set pressure threshold, it is determined that effective external pressure has been received; for the touch sensor, when the detected signal strength, touch area and other parameters exceed the set touch threshold, it is determined that a touch operation has occurred. These thresholds are usually debugged and determined according to the actual application environment and requirements. For example, when artificial external force is applied to determine a suitable touch signal strength threshold, only when the touch signal strength is higher than the threshold will it be considered a valid touch operation, and then the door opening and other instructions will be executed, while non-artificial external forces such as branches and stones are regarded as invalid touch operations.

[0028] Time characteristic judgment: The time characteristic of the signal is considered for judgment. For example, a short, instantaneous pressure change or touch signal may be an interference signal and will not be responded to; while a pressure or touch signal that lasts for a certain period of time is considered to be a valid operation instruction. The judgment of the time characteristic of the signal can be achieved by setting a time window or using a filtering algorithm. For example, during driving, if the surface of the car logo is only touched briefly, the device may ignore the signal; but if the touch time exceeds a certain duration, such as more than 0.5 seconds, the device will determine it as a valid car logo switching instruction.

[0029] Signal change rate judgment: Calculate the change rate of the pressure or touch signal to determine whether it is a real operation. If the signal change rate is within a certain range and conforms to the logic of normal operation, it is considered to be a valid instruction; if the signal change rate is abnormal, it may be interference or misoperation. For example, when a finger quickly passes over the surface of the car logo, the change rate of the touch signal will be large. In this case, the car logo switching instruction may not be triggered. Only when the finger stably touches the car logo, the signal change rate is small and stable, will it be regarded as a valid switching operation. The above method can improve the reliability and accuracy of the device by reasonably setting the threshold, analyzing the signal characteristics, and combining the vehicle status and environmental factors for judgment, providing users with a more convenient and safer use experience.

[0030] In the detection mode, the real-time status during the logo switching process is detected. When the pressure sensor / touch sensor is triggered by external pressure or the touch state change on the logo surface, the touch shutdown command corresponding to the current pressure sensor / touch sensor is identified to effectively prevent false triggering; the real-time current during the logo switching process is detected to determine whether the real-time current value has abnormal fluctuations during operation to ensure the safety of the motor operation and identify abnormalities when the current floats to prevent foreign objects such as stones from jamming the motor; in the abnormal mode, the fault handling mechanism is triggered according to the identified fault signal. When the false alarm touch signal or the pressure signal of the external force does not reach the preset intensity threshold to form a false touch signal, the corresponding pressure sensor / touch sensor is diagnosed and calibrated through the MCU module; when a stall state other than a false touch signal is identified, a stop command is issued to the motor and the corresponding protection operation is performed. After the stall fault is eliminated, a reset operation is performed to restore the normal working state, and software and hardware self-checks are automatically performed to optimize the running state. For example, if the motor fails, such as overheating, abnormal speed or failure to start, the MCU module will try to perform protective operations on the motor according to the preset algorithm and logic, such as reducing the power output of the motor, adjusting the operating parameters of the motor or trying to restart the motor, etc. If these measures cannot solve the problem, the device will record detailed fault information and display the corresponding fault prompt to the driver through the vehicle's dashboard or central control screen. At the same time, it may limit the further switching operation of the car logo to prevent the fault from further expanding. When the sensor fails, such as the touch sensor keeps misreporting the touch signal or the pressure sensor cannot correctly detect the pressure change, the MCU module will diagnose and calibrate the sensor, try to compensate for the sensor error through the software algorithm or switch to a spare sensor. When receiving a switching anomaly caused by external interference, such as severe vibration during vehicle driving, electromagnetic interference, etc., which affects the normal switching of the car logo, the device will temporarily suspend the switching operation and wait for the interference source to disappear. At the same time, the MCU module will check and correct its own program running status and clear the erroneous data or status caused by interference. Once the interference disappears and the device returns to normal, the logo switching operation will continue. If the interference lasts too long or the interference intensity is too strong, the device will send a warning message to the driver to inform him that there is an abnormality in the current logo switching.

[0031] Based on the same inventive concept, this embodiment also provides a vehicle, including the vehicle logo switching device as described in the above embodiment.

[0032] Based on the same inventive concept, see Figure 3 As shown, this embodiment also provides a control method of the vehicle logo switching device described in the above embodiment, including: Power on and read the calibration data in the current running state. The calibration data includes the starting position, target position and key parameters of the vehicle logo during the switching process. The main logo and the secondary logo are reset to zero to ensure that the logo is at the calibrated starting position before the switching action. For example, the starting position of the main logo is the B travel node, that is, located at the center of the vehicle center display area, and the starting position of the secondary coordinate is the A travel node, that is, the leftmost travel position. When switching, the main logo is moved from the B travel node to the C travel node, that is, the rightmost travel position, and the secondary logo is linked to move from the A travel node, that is, the leftmost travel position, to the B travel node to reach the display area. By returning the main logo and the secondary logo to zero, the system ensures that each switching is performed under the same initial conditions, thereby improving the accuracy of the switching; Receive target control instructions and determine whether to trigger the pressure sensor / touch sensor; When the pressure sensor / touch sensor is triggered by external pressure or by changes in the touch state of the vehicle logo surface, the pressure sensor / touch sensor is triggered, and the touch-to-shutdown command corresponding to the current pressure sensor / touch sensor is valid; the touch-to-shutdown command here refers to an internal instruction or signal triggered by external input such as pressure or touch, which is used to control the vehicle logo switching operation.

[0033] When the current shutdown command is valid, execute the main logo shutdown command, run the motor to drive the main logo to switch, record the travel information of the main logo from the starting position to the target position and read the real-time current data; Determine whether the current switching stroke exceeds the preset extreme stroke to prevent over-travel operation and ensure that the vehicle logo has been completely switched to the target position; only when the vehicle logo runs to a position exceeding the extreme stroke can it be ensured that the vehicle logo has been completely switched to the target state. If the current running stroke is less than or equal to the extreme stroke, the vehicle logo may not be completely switched, affecting the use effect and safety.

[0034] When the current switching stroke exceeds the preset extreme stroke, the logo switch in the cab successfully completes the switching operation between the main logo and the auxiliary logo, clears the touch-off command corresponding to the pressure sensor / touch sensor, shuts down the motor and puts it into standby mode. The above control method automatically reads the calibration data and judges the trigger conditions, realizes the intelligent control of the logo switching, ensures that the logo is in the starting position before switching, improves the switching accuracy, records the stroke information and real-time current data, facilitates the monitoring of the logo switching process, prevents over-travel operation, ensures that the logo is completely switched to the target state, avoids damage, clears the touch-off command and puts the motor into standby mode, and improves the stability and reliability of the device. Among them, the current switching stroke refers to the route corresponding to the main vehicle logo from the B stroke node to the C stroke node and the auxiliary vehicle logo from the A stroke node to the B stroke node. The preset extreme stroke refers to the extreme position or maximum stroke range that the vehicle logo can reach during the switching process. By comparing the current running stroke with the extreme stroke, it is possible to accurately determine whether the vehicle logo has reached the target position. If the current running stroke is less than the extreme stroke, the device may misjudge that the vehicle logo has been switched, thereby stopping the operation of the drive module, resulting in incomplete switching of the vehicle logo.

[0035] It can be understood that the above control process reads the calibration data under the current running state by powering on, and resets the main logo and the auxiliary logo to zero, ensuring that the logo is in the predetermined starting position before each switch, which improves the accuracy and consistency of the logo switching; it can automatically receive the target control command, and intelligently execute the logo switching operation according to the triggering of the pressure sensor or the touch sensor. This automatic control reduces human intervention and improves the intelligence level of the system; during the switching process, the system records the stroke information and real-time current data of the main logo. This helps to monitor the logo switching process, ensure the smooth switching action, and perform fault diagnosis when necessary; by judging whether the current switching stroke exceeds the preset extreme stroke, the system can ensure that the logo has been completely switched to the target position to prevent damage to the logo or incomplete switching due to over-travel operation; clearing the touch shutdown command and putting the motor into standby mode helps protect the system from unnecessary energy consumption and wear, while improving the stability and reliability of the system.

[0036] Further, the determining whether to trigger the pressure sensor / touch sensor includes: If the pressure sensor / touch sensor is triggered, the shutdown command of the pressure sensor / touch sensor is effective, and the main logo shutdown command is executed through the logo switch in the cab, and the motor drives the main and auxiliary logos to switch, and the travel information of the main and auxiliary logos from the starting position to the target position is recorded and the real-time current data is read; If the pressure sensor / touch sensor is not triggered, it is further determined whether the received main logo closing command is a command issued by the logo switch in the cab to prevent false triggering; If the command is issued by the Logo switch in the cab, the motor is also operated to switch the main and auxiliary logos; if the command is not issued by the Logo switch in the cab, the pressure sensor touch shutdown command is checked again to see if it is valid. If it is valid, the motor is operated to switch the main and auxiliary logos. If it is invalid, it returns to the superior to continue waiting to receive the target control command and repeat the subsequent judgment logic. This effectively distinguishes the triggering of the pressure sensor / touch sensor and the command of the Logo switch in the cab, avoids misoperation, ensures that only valid commands will execute the logo switching, enhances the stability of the device, and realizes accurate monitoring of the logo switching process by recording travel information and real-time current data. It can make corresponding judgments and processing according to different situations, and improves the intelligence level of the device. The command issued by the Logo switch in the cab here refers to the logo switching command actively triggered by the driver or vehicle control system in the cab. This command is issued through a physical switch, a touch screen interface or other electronic control methods. By effectively distinguishing between the triggering of the pressure sensor / touch sensor and the command of the logo switch in the cab, misoperation is avoided, ensuring that only valid instructions will execute the logo switching, thereby enhancing the stability and reliability of the device; it can make corresponding judgments and processing according to different situations such as the triggering of the pressure sensor / touch sensor or the command of the logo switch in the cab, thereby improving the intelligence level of the device; by recording travel information and real-time current data, it can achieve accurate monitoring of the logo switching process, which helps to promptly discover and solve potential problems and ensure the smooth switching of the logo; it can further determine whether the received main logo closing command is a command issued by the logo switch in the cab to prevent mistriggers and improve the fault tolerance of the device.

[0037] Further, the determining whether the current switching stroke exceeds the preset extreme stroke includes: When the current switching stroke does not exceed the preset extreme stroke distance, the real-time current value obtained during the switching stroke is compared with the preset stall current value to determine whether the motor is in a stall state; If the current real-time current value is greater than the preset stall current value, the motor is in stall state and the fault diagnosis process is started; Further confirm whether the current stall state is a fault. If it is confirmed that the current stall state is a fault, the motor stops and reports the relevant fault information to the ECU, i.e. the Electronic Control Unit, which is the electronic control unit. Then, the pressure sensor triggers the shutdown command and enters the standby state. If it is confirmed that there is no fault or the current current is less than the preset stall current value, it will return to the upper level to continue waiting for receiving the target control command and repeat the subsequent judgment logic; Among them, the faults confirmed as stalled status include stalls caused by over-voltage, under-voltage, over-current, abnormal temperature, foreign objects in the switching stroke, and internal faults. The above judgment process monitors the motor status in real time, promptly discovers potential problems such as stalls, and prevents more serious faults from occurring. Once a fault is confirmed, the machine is shut down immediately and reported to the ECU to avoid equipment damage or safety accidents. The cause of the fault is accurately determined to reduce misjudgments and unnecessary shutdowns, thereby improving the reliability of the device. It is convenient for maintenance personnel to quickly locate and solve problems, thereby reducing maintenance costs.

[0038] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A vehicle logo switching device, characterized in that: It includes an MCU module and a current acquisition module, a motor transmission mechanism, a sensor module, and a power supply module which are electrically connected to the MCU module respectively. The MCU module integrates a state detection unit, a drive unit and a current detection unit, and is used to obtain a target sensor signal, trigger a target control instruction according to the target sensor signal to drive the motor transmission mechanism to operate the working mode of switching between the main vehicle logo and the auxiliary vehicle logo, and at the same time, respectively perform state detection and current detection and correction on the real-time state and real-time current during the vehicle logo switching process; The current acquisition module is connected to the current detection unit and is used to collect the real-time current signal generated during the vehicle logo switching process and feed it back to the MCU module; The motor transmission mechanism is configured as an actuator that drives the main vehicle logo and the auxiliary vehicle logo to switch between each other through the motor drive module, and is used to execute the switching action between the main vehicle logo and the auxiliary vehicle logo according to the target control instruction and feed back the switching state to the MCU module; The sensor modules are respectively arranged on the main vehicle logo and the secondary vehicle logo, and are used to obtain sensor signals in real time and transmit them to the MCU module; The power supply module has one path connected to the driving module and the current acquisition module to the current detection unit, and another path directly connected to the MCU module, and is used to convert the input body power supply voltage into a digital power supply voltage and supply power to each module; Among them, the state detection is the sensor signal or switch command that meets the vehicle logo switching trigger condition.

2. The vehicle logo switching device according to claim 1, characterized in that: In the switching mode, when the pressure sensor / touch sensor is triggered by external pressure or by the change of the touch state of the logo surface, the sensing signal is obtained and fed back to the MCU module, and the target control command is issued by the MCU module to drive the motor transmission mechanism, so as to recover the main logo located in the center display area of ​​the vehicle and simultaneously display the secondary logo to the center display area of ​​the vehicle to realize the rapid switching of the main and secondary logos; In the detection mode, the real-time status of the vehicle logo switching process is detected. When the pressure sensor / touch sensor is triggered by external pressure or the touch status change on the vehicle logo surface, the touch-off command corresponding to the current pressure sensor / touch sensor is identified to effectively prevent false triggering; Conduct current detection on the real-time current during the vehicle logo switching process to determine whether the real-time current value fluctuates abnormally during operation to ensure the safety of motor operation and identify abnormalities when the current fluctuates; In abnormal mode, the fault handling mechanism is triggered according to the identified fault signal. When a false touch signal or a pressure signal caused by an external force does not reach the preset intensity threshold to form a false touch signal, the corresponding pressure sensor / touch sensor is diagnosed and calibrated through the MCU module. When a stall state other than a false touch signal is identified, a stop command is issued to the motor and corresponding protection operations are performed. After the stall fault is eliminated, a reset operation is performed to restore the normal working state, and software and hardware self-checks are automatically performed to optimize the operating state.

3. The vehicle logo switching device according to claim 1, characterized in that: The motor drive module includes a motor and an H-bridge composed of a first MOS tube Q1, a second MOS tube Q2, a third MOS tube Q3 and a fourth MOS tube Q4. One end of the motor is connected to the collectors of the first MOS tube Q1 and the fourth MOS tube Q4, and the other end of the motor is connected to the collectors of the second MOS tube Q2 and the third MOS tube Q3. Different operating states of the motor are achieved by controlling the conduction and cutoff of the four MOS tubes.

4. The vehicle logo switching device according to claim 1, characterized in that: The power supply module includes a body power supply, an anti-reverse filtering module and a power management module. The output end of the body power supply is connected to the input end of the anti-reverse filtering module. One output end of the anti-reverse filtering module and the input end of the power management module are connected to the MCU module. Another output end of the anti-reverse filtering module is connected to the input end of the driving module. The output end of the driving module is connected to the input end of the current acquisition module. The output end of the current acquisition module is grounded and is used to output the original power from the body power supply, output the pre-processed power after the anti-reverse, filtering and overvoltage protection processing of the anti-reverse filtering module, and convert the input pre-processed power supply voltage into a target digital power supply voltage through the power supply module, and distribute the target digital power supply voltage to the next-level H-bridge and MCU module for power supply.

5. The vehicle logo switching device according to claim 1, characterized in that: Also includes position switch and recovery switch; The position switch is used to set the preset extreme position of the main logo and the auxiliary logo corresponding to the travel, and is used to detect whether the corresponding logo has reached the target switching position. When the main / auxiliary logo runs to the preset extreme position, the position switch is triggered and the motor stops running; The recovery switch is integrated in the vehicle cab. When the recovery switch is turned on and the position switch is detected to be triggered at the same time, the main vehicle logo returns to the starting position; Among them, the main vehicle logo and the secondary vehicle logo are arranged to be linked with each other so that the switching stroke has the vehicle logo switching state of AB stroke node linkage and BC stroke node linkage. In the first state, the target control instruction is received to drive the main vehicle logo from the starting B stroke node to the C stroke node to recover the main vehicle logo, and the secondary vehicle logo is driven from the A stroke node to the B stroke node to display the secondary vehicle logo; in the second state, the recovery instruction is received to drive the main vehicle logo from the C stroke node to the B stroke node to display the main vehicle logo, and the secondary vehicle logo is driven from the B stroke node to the A stroke node to recover the secondary vehicle logo. The A stroke node is the starting position of the secondary vehicle logo in the non-switching mode, and is located in the vehicle logo recovery area; the B stroke node is the starting position of the main vehicle logo in the non-switching mode and the target position of the secondary vehicle logo in the switching mode, and is located in the center display area of ​​the vehicle; the C stroke node is the target position when the main vehicle logo is recovered in the switching mode, and is located in the vehicle logo recovery area.

6. The vehicle logo switching device according to claim 3, characterized in that: The power management module includes any one of a DCDC converter and an LDO regulator.

7. A vehicle, characterized in that: It comprises a vehicle logo switching device as described in any one of claims 1 to 6.

8. A control method for a vehicle logo switching device according to any one of claims 1 to 6, characterized in that: include: Power on and read the calibration data under the current operating status; Return the main and auxiliary vehicle logos to zero position to ensure that the vehicle logos are at the calibrated starting position before switching; Receive target control instructions and determine whether to trigger the pressure sensor / touch sensor; When the pressure sensor / touch sensor is triggered by external pressure or by a change in the touch state of the vehicle logo surface, the pressure sensor / touch sensor is triggered, and the touch shutdown command corresponding to the current pressure sensor / touch sensor is valid; When the current shutdown command is valid, execute the main logo shutdown command, run the motor to drive the main logo to switch, record the travel information of the main logo from the starting position to the target position and read the real-time current data; Determine whether the current switching stroke exceeds the preset extreme stroke to prevent over-travel operation and ensure that the vehicle logo has been completely switched to the target position; When the current switching stroke exceeds the preset extreme stroke, the logo switch in the cab successfully completes the switching operation between the main logo and the auxiliary logo, clears the shutdown command corresponding to the pressure sensor / touch sensor, stops the motor and puts it into standby mode.

9. The control method of the vehicle logo switching device according to claim 8, characterized in that: The determining whether to trigger the pressure sensor / touch sensor comprises: If the pressure sensor / touch sensor is triggered, the shutdown command of the pressure sensor / touch sensor is effective, and the main logo shutdown command is executed through the logo switch in the cab, and the motor drives the main and auxiliary logos to switch, and the travel information of the main and auxiliary logos from the starting position to the target position is recorded and the real-time current data is read; If the pressure sensor / touch sensor is not triggered, it is further determined whether the received main logo closing command is a command issued by the logo switch in the cab to prevent false triggering; If the command is sent by the logo switch in the cab, the motor will also be run to switch the primary and secondary logos; if the command is not sent by the logo switch in the cab, check again whether the pressure sensor shutdown command is valid. If it is valid, the motor will be run to switch the primary and secondary logos. If it is not valid, return to the superior and continue to wait for receiving the target control command and repeat the subsequent judgment logic.

10. The control method of the vehicle logo switching device according to claim 8, characterized in that: The step of judging whether the current switching stroke exceeds the preset extreme stroke includes: When the current switching stroke does not exceed the preset extreme stroke distance, the real-time current value obtained during the switching stroke is compared with the preset stall current value to determine whether the motor is in a stall state; If the current real-time current value is greater than the preset stall current value, the motor is in stall state and the fault diagnosis process is started; Further confirm whether the current stall state is a fault. If it is confirmed that the current stall state is a fault, the motor stops and reports the relevant fault information to the ECU, then clears the shutdown command of the pressure sensor and enters the standby state; If it is confirmed that there is no fault or the current current is less than the preset stall current value, it will return to the upper level to continue waiting for receiving the target control command and repeat the subsequent judgment logic; Among them, the faults confirmed as stalled rotor state include over-voltage, under-voltage, over-current, abnormal temperature, stalled rotor caused by foreign objects in the switching stroke, and internal faults.

Images