Automobile electric seat and electronic control device thereof

Abstract

The embodiment of the utility model provides an automobile electric seat and an electronic control device thereof, and the electronic control device comprises an instruction generation module which comprises a seat position memory unit used for memorizing a first target position and a generation instruction generation unit used for generating a first position adjusting instruction containing the first target position; the motor driving and feedback module comprises a motor driving unit and a motor ripple signal processing unit; the motor driving unit is used for responding to a corresponding control instruction to drive a driving motor to work; the motor ripple signal processing unit is used for identifying and analyzing ripple signals generated when the driving motor works and correspondingly outputting the number of motor rotation turns and actual working current of the driving motor; and the microcontroller is used for determining the current position of the automobile electric seat, responding to the first position adjusting instruction to generate a first control instruction for correspondingly controlling the motor driving unit, and performing closed-loop control on the motor driving unit according to the actual working current. According to the embodiment of the invention, the original electric seat of the automobile can be transformed and upgraded at lower cost.

Description

Technical Field

[0001] This utility model relates to the field of automotive electric seat technology, and in particular to an automotive electric seat and its electronic control device. Background Technology

[0002] The installation of power seats in cars is becoming increasingly mainstream. Users can adjust the seat position by operating the relevant control switches on the power seat's control unit to activate the drive motor and move the seat. In addition, some power seats are equipped with a seat position memory unit. After adjusting the seat to the correct position, the user can control the seat position memory unit to record the current position. During subsequent use, the user can retrieve the previously recorded position information through the seat position memory unit to directly control the drive motor to move the seat to the target position, achieving quick and automatic seat adjustment.

[0003] However, the inventors discovered during implementation that a large number of existing cars on the market are still not equipped with seat position memory units. When upgrading and modifying such existing cars to add seat position memory function, the current position of the seat is determined in real time by monitoring the number of rotations of the drive motor in real time in order to achieve precise control. For this purpose, it is necessary to replace the drive motor with one that has Hall signal output function, which is costly. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide an electronic control device for an electric car seat, which can upgrade the existing electric car seat at low cost.

[0005] The further technical problem to be solved by this utility model embodiment is to provide an electric car seat that can upgrade existing electric car seats at low cost.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an electronic control device for an electric car seat, used to control the drive motor of the electric car seat, the electronic control device comprising:

[0007] The instruction generation module includes a seat position memory unit that memorizes the current position of the electric car seat as a first target position in response to a user's recording position operation, and an instruction generation unit connected to the seat position memory unit and used to generate a first position adjustment instruction containing the first target position in response to a user's reset operation.

[0008] The motor drive and feedback module includes a motor drive unit connected to the drive motor for driving the drive motor in response to corresponding control commands, and a motor ripple signal processing unit disposed in the drive circuit between the motor drive unit and the drive motor for identifying and analyzing the ripple signal generated when the drive motor is working and outputting the number of rotations and the actual operating current of the drive motor accordingly; and

[0009] The microcontroller is connected to the instruction generation unit, the motor drive unit, and the motor ripple signal processing unit, respectively. It is used to determine the current position of the electric car seat based on the number of rotations of the motor, and respond to the first position adjustment instruction to generate a first control instruction corresponding to the motor drive unit based on the current position of the electric car seat and the first target position contained in the first position adjustment instruction. It also performs closed-loop control of the motor drive unit based on the actual operating current.

[0010] Furthermore, the instruction generation unit is also connected to the vehicle's signal bus to acquire a predetermined vehicle control signal via the signal bus and generate a second position adjustment instruction containing a second target position based on the vehicle control signal. The microcontroller also generates a second control instruction corresponding to control the motor drive unit based on the current position of the vehicle's electric seat and the second target position contained in the second position adjustment instruction.

[0011] Furthermore, the microcontroller is also connected to the original seat control switch of the car's electric seat to control the motor drive unit to drive the drive motor in response to the control signal of the seat control switch. The microcontroller is connected to the power supply terminal and signal output terminal of the seat control switch with a power supply pin and a signal receiving pin respectively, or the microcontroller is connected to the signal output terminal of the seat control switch with only a signal receiving pin.

[0012] Furthermore, the electronic control device also includes:

[0013] A short-circuit protection module is installed in the original control circuit of the seat control switch and drive motor of the car electric seat and is connected to the microcontroller. It is used to detect the working status of the microcontroller to disconnect the control circuit of the seat control switch and drive motor when the microcontroller is working and to connect the control circuit of the seat control switch and drive motor when the microcontroller stops working.

[0014] Furthermore, the short-circuit protection module includes:

[0015] The intelligent control unit, connected to the microcontroller, is used to detect the operating state of the microcontroller and output corresponding disconnect and connect signals when the microcontroller is working and stopped working; and

[0016] A short-circuit control switch is installed in the control circuit between the seat control switch and the drive motor and is connected to the intelligent control unit. It is used to disconnect and connect the control circuit respectively in response to the disconnect signal and the conduction signal.

[0017] Furthermore, the drive motor is connected to the vehicle's on-board power supply via the seat control switch, and the short-circuit control switch is located in the power supply line between the on-board power supply and the seat control switch, or in the power supply line between the seat control switch and the drive motor.

[0018] Furthermore, the electronic control device includes multiple motor drive and feedback modules for connecting and driving different drive motors, and each motor drive and feedback module is connected to the microcontroller.

[0019] Furthermore, the electronic control device also includes:

[0020] A power conversion module, connected to the vehicle's onboard power supply, is used to convert the initial voltage output by the onboard power supply into a predetermined operating voltage to power the various power modules of the electronic control device.

[0021] Furthermore, the electronic control device also includes:

[0022] A program upgrade module, connected to the microcontroller, is used to interact with an external data source to obtain upgrade data and upgrade the microcontroller; and

[0023] The prompting module is connected to the microcontroller and is used to trigger an alarm prompt by the microcontroller when the microcontroller malfunctions or undergoes a data upgrade.

[0024] On the other hand, in order to solve the above-mentioned further technical problems, the present utility model embodiment also provides the following technical solution: an electric car seat, including a seat body, a drive motor for adjusting the position of the seat body, and an electronic control device connected to the drive motor for controlling the working state of the drive motor, wherein the electronic control device is any of the electronic control devices described above.

[0025] After adopting the above technical solution, the present utility model embodiment has at least the following beneficial effects: The instruction generation module of the electronic control device in the present utility model embodiment adds a seat position memory unit that remembers the current position of the car electric seat as a first target position in response to the user's recording position operation, and an instruction generation unit that generates a first position adjustment instruction containing the first target position in response to the user's reset operation, thereby realizing the memory control function of the car electric seat; and to achieve accurate identification and control of the car electric seat, the drive motor is driven by the motor drive unit of the motor drive and feedback module, and a motor ripple signal processing unit is added to identify and analyze the ripple signal generated when the drive motor is working and output the drive motor signal. The number of motor rotations can be obtained without using a drive motor with Hall signal output. The microcontroller then determines the current position of the car's electric seat based on the number of motor rotations and responds to the first position adjustment command to generate a first control command corresponding to the motor drive unit based on the current position of the car's electric seat and the first target position contained in the first position adjustment command. This enables effective control of the drive motor. Furthermore, the motor ripple signal processing unit can also identify the actual operating current of the output drive motor, so the microcontroller can also perform closed-loop control of the motor drive unit based on the actual operating current, such as feedback adjustment or overcurrent protection, resulting in a higher level of intelligence. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of an optional embodiment of the electric car seat of this utility model.

[0027] Figure 2 This is a schematic diagram of another optional embodiment of the electric car seat of this utility model.

[0028] Figure 3 This is a schematic diagram of another optional embodiment of the electric car seat of this utility model.

[0029] Figure 4 This is a schematic diagram of another optional embodiment of the electric car seat of this utility model. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0031] like Figure 1-Figure 3As shown, an optional embodiment of this utility model provides an electronic control device 1 for an electric car seat, used to control the drive motor 3 of the electric car seat. The electronic control device 1 includes:

[0032] The instruction generation module 10 includes a seat position memory unit 101 that remembers the current position of the electric car seat as a first target position in response to a user's recording position operation, and an instruction generation unit 103 connected to the seat position memory unit 101 and used to generate a first position adjustment instruction containing the first target position in response to a user's reset operation.

[0033] The motor drive and feedback module 12 includes a motor drive unit 121 connected to the drive motor 3 for driving the drive motor 3 in response to corresponding control commands, and a motor ripple signal processing unit 123 disposed in the drive line between the motor drive unit 121 and the drive motor 3 for identifying and analyzing the ripple signal generated when the drive motor 3 is working and outputting the number of rotations and actual operating current of the drive motor accordingly; and

[0034] The microcontroller 14 is connected to the instruction generation unit 103, the motor drive unit 121, and the motor ripple signal processing unit 123, respectively. It is used to determine the current position of the electric car seat according to the number of rotations of the motor, and respond to the first position adjustment instruction to generate a first control instruction corresponding to the motor drive unit 121 based on the current position of the electric car seat and the first target position contained in the first position adjustment instruction. It also performs closed-loop control of the motor drive unit 121 according to the actual operating current.

[0035] In this embodiment of the invention, the instruction generation module 10 of the electronic control device 1 adds a seat position memory unit 101 that remembers the current position of the electric car seat as a first target position in response to the user's recording position operation, and an instruction generation unit 103 that generates a first position adjustment instruction containing the first target position in response to the user's reset operation, thereby realizing the memory control function of the electric car seat. To achieve accurate identification and control of the electric car seat, the motor drive unit 121 of the motor drive and feedback module 12 drives the drive motor 3, and a motor ripple signal processing unit 123 is added to identify and analyze the ripple signal generated when the drive motor 3 is working and output the number of rotations of the drive motor 3, thus achieving seamless control. The number of rotations of the drive motor 3 can be obtained by using a drive motor 3 with Hall signal output. Then, the microcontroller 14 determines the current position of the car electric seat based on the number of rotations of the motor, and responds to the first position adjustment command to generate a first control command corresponding to the motor drive unit 121 based on the current position of the car electric seat and the first target position contained in the first position adjustment command. This can achieve effective control of the drive motor 2. Moreover, the motor ripple signal processing unit 123 can also identify the actual operating current of the output drive motor 2. Thus, the microcontroller 14 can also perform closed-loop control of the motor drive unit 121 based on the actual operating current, such as feedback adjustment or overcurrent protection, which is more intelligent.

[0036] It is understood that the seat position mentioned in this application not only refers to the spatial position reflecting the three-dimensional displacement of the seat in six directions (front, back, left, right, up, and down), but may also include the angular position reflecting the change in the tilt of the seat back; in addition, the seat position memory unit 101 may be a specific physical function button or a virtual button integrated in the vehicle touch screen, etc.

[0037] In one optional embodiment of this utility model, such as Figure 1-Figure 3 As shown, the instruction generation unit 103 is also connected to the vehicle's signal bus 4 to obtain a predetermined vehicle control signal via the signal bus 4 and generate a second position adjustment instruction containing a second target position based on the vehicle control signal. The microcontroller 14 also generates a second control instruction corresponding to control the motor drive unit 121 based on the current position of the vehicle's electric seat and the second target position contained in the second position adjustment instruction.

[0038] In this embodiment, the corresponding vehicle control signals, such as the car ignition off signal and the door opening signal, can also be obtained from the signal bus 4 (e.g., CAN signal loop or hard-wired signal loop). At this time, the instruction generation unit 103 processes the above signals and sends them to the microcontroller 14. Then, the microcontroller 14 controls the drive motor 3 through the motor drive unit 121 to drive the car electric seat to move automatically. This enables the electric seat to automatically move from its current position to the second target position when the engine is off or the door is opened, so as to facilitate the entry and exit of personnel. When the car starts to drive normally, the electric seat automatically returns to the first target position, thereby increasing the driving safety of the driver and the riding comfort of the passengers, and improving the user experience.

[0039] In one optional embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the microcontroller 14 is also connected to the original seat control switch 6 of the car's electric seat to control the motor drive unit 121 to drive the drive motor 3 in response to the control signal of the seat control switch 6. The microcontroller 14 is connected to the power supply terminal and signal output terminal of the seat control switch 6 respectively via a power supply pin and a signal receiving pin, or the microcontroller 14 is connected to the signal output terminal of the seat control switch 6 only via a signal receiving pin. In this embodiment, the original seat control switch 6 of the car's electric seat is also connected to the microcontroller 14, so that the car's electric seat can still achieve position adjustment through the original seat control switch 6, retaining the original control method, making it convenient to use and improving utilization. In specific implementation, such as Figure 1 As shown, the power supply pin and signal receiving pin of the seat control switch 6 can both be connected to the microcontroller 14; of course, as... Figure 2 As shown, the seat control switch 6 can retain the original wiring method for the power supply pin and connect to the vehicle power supply 7, while only connecting the signal receiving pin to the microcontroller 14, thereby reducing wiring difficulty and modification costs.

[0040] In one optional embodiment of this utility model, such as Figure 2-Figure 3 As shown, the electronic control device 1 further includes:

[0041] A short-circuit protection module 15 is installed in the control circuit between the seat control switch 6 and the drive motor 3 and connected to the microcontroller 14. It detects the operating status of the microcontroller 14 to disconnect the control circuit between the seat control switch 6 and the drive motor 3 when the microcontroller 14 is operating, and to reconnect the control circuit when the microcontroller 14 stops operating. In this embodiment, by installing the short-circuit protection module 15, detecting the operating status of the microcontroller 14, disconnecting the control circuit between the seat control switch 6 and the drive motor 3 when the microcontroller 14 is operating, and reconnecting the control circuit when the microcontroller 14 stops operating, short-circuit damage to the drive motor 3 is prevented when the user controls the drive motor 3 through the seat control switch 6 during the microcontroller 14's control process. This not only preserves the original control method but also ensures circuit safety.

[0042] In one optional embodiment of this utility model, such as Figure 2-Figure 3 As shown, the short-circuit protection module 15 includes:

[0043] Intelligent control unit 151, connected to the microcontroller 14, is used to detect the operating state of the microcontroller 14 and output disconnect and connect signals respectively when the microcontroller 14 is working and stopped working; and

[0044] A short-circuit control switch 153 is installed in the control circuit of the seat control switch 6 and the drive motor 3 and is connected to the intelligent control unit 151. It is used to disconnect and connect the control circuit respectively in response to the disconnect signal and the conduction signal.

[0045] In this embodiment, an intelligent control unit 151 is used to detect the working state of the microcontroller 14 and output disconnect and conduction signals accordingly. Then, the short-circuit control switch 153 realizes disconnection and conduction according to the corresponding signals. The circuit principle is simple and easy to implement. Specifically, the short-circuit control switch 153 can be a common switching element in circuits such as a relay or MOSFET.

[0046] In an optional embodiment of this utility model, the drive motor 3 is connected to the vehicle's on-board power supply 7 via the seat control switch 6, such as... Figure 2 As shown, the short-circuit control switch 153 is located in the power supply line between the vehicle power supply 7 and the seat control switch 6, or as... Figure 3As shown, the short-circuit control switch 153 is located in the power supply line between the seat control switch 6 and the drive motor 3. In this embodiment, since the drive motor 3 is connected to the vehicle's on-board power supply 7 through the seat control switch 6, the short-circuit control switch 153 controls the on / off state of the control circuit between the seat control switch 6 and the drive motor 3. Its location can be between the on-board power supply 7 and the seat control switch 6, or between the seat control switch 6 and the drive motor 3. Both locations can achieve control, and the specific circuit design can be flexibly adjusted according to design requirements.

[0047] In one optional embodiment of this utility model, such as Figure 2-Figure 3 As shown, the electronic control device 1 includes multiple motor drive and feedback modules 12 for connecting and driving different drive motors 3, and each motor drive and feedback module 12 is connected to the microcontroller 14. In this embodiment, since automotive electric seats are typically equipped with multiple drive motors 3 to achieve forward and backward movement, height adjustment, and angle adjustment, the electronic control device 1 is equipped with one motor drive and feedback module 12 for each drive motor 3 to achieve effective driving and control of each drive motor 3.

[0048] In one optional embodiment of this utility model, such as Figure 1-Figure 3 As shown, the electronic control device 1 further includes:

[0049] The power conversion module 16 is connected to the vehicle's on-board power supply 7 and is used to convert the initial voltage output by the on-board power supply 7 into a predetermined operating voltage to supply power to each power module 8 of the electronic control device 1.

[0050] In this embodiment, a power conversion module 16 is also provided to facilitate power supply to each power-consuming module 8 of the electronic control device 1. In specific implementation, the vehicle power supply 7 typically outputs an initial voltage of 12V. The power conversion module 16 typically converts the initial 12V voltage to a predetermined operating voltage of 5V or 3.3V before supplying power to each power-consuming module 8 of the electronic control device 1. It can be understood that the power-consuming module 8 includes the aforementioned signal generation module 10, motor drive and feedback module 12, and microcontroller 14, etc.

[0051] In one optional embodiment of this utility model, such as Figure 1-Figure 3 As shown, the electronic control device 1 further includes:

[0052] Program upgrade module 17, connected to the microcontroller 14, is used to interact with an external data source to obtain upgrade data and upgrade the microcontroller 14; and

[0053] The prompting module 18 is connected to the microcontroller 14 and is used to control the alarm prompting by the microcontroller 14 when the microcontroller 14 fails or the data is upgraded.

[0054] In this embodiment, a program upgrade module 17 is also included to facilitate data upgrades to the microcontroller 14 by interacting with an external data source. Specifically, the data interaction with the external data source can be via a memory card, CAN communication upgrade, or Bluetooth wireless transmission. Furthermore, a notification module 18 is included to provide alarm notifications when the microcontroller 14 malfunctions or requires an upgrade, effectively alerting the driver. In specific implementations, the notification module 18 can be implemented in many ways, such as as a buzzer, a light alarm, or a combined sound and light alarm.

[0055] On the other hand, such as Figure 1-Figure 4 As shown, an optional embodiment of this utility model provides an electric car seat, including a seat body, a drive motor 3 for adjusting the position of the seat body, and an electronic control device 1 connected to the drive motor 3 for controlling the working state of the drive motor 3. The electronic control device 1 is the electronic control device 1 of any of the above embodiments. In this embodiment, the electric car seat uses the aforementioned electronic control device 1, which can achieve the upgrading of the original electric car seat at a lower cost.

[0056] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. An electronic control device for an electric car seat, used to control the drive motor of the electric car seat, characterized in that, The electronic control device includes: The instruction generation module includes a seat position memory unit that memorizes the current position of the electric car seat as a first target position in response to a user's recording position operation, and an instruction generation unit connected to the seat position memory unit and used to generate a first position adjustment instruction containing the first target position in response to a user's reset operation. The motor drive and feedback module includes a motor drive unit connected to the drive motor for driving the drive motor in response to corresponding control commands, and a motor ripple signal processing unit disposed in the drive circuit between the motor drive unit and the drive motor for identifying and analyzing the ripple signal generated when the drive motor is working and outputting the number of rotations and the actual operating current of the drive motor accordingly; and The microcontroller is connected to the instruction generation unit, the motor drive unit, and the motor ripple signal processing unit, respectively. It is used to determine the current position of the electric car seat based on the number of rotations of the motor, and respond to the first position adjustment instruction to generate a first control instruction corresponding to the motor drive unit based on the current position of the electric car seat and the first target position contained in the first position adjustment instruction. It also performs closed-loop control of the motor drive unit based on the actual operating current.

2. The electronic control device for an electric car seat as described in claim 1, characterized in that, The instruction generation unit is also connected to the vehicle's signal bus to acquire a predetermined vehicle control signal via the signal bus and generate a second position adjustment instruction containing a second target position based on the vehicle control signal. The microcontroller also generates a second control instruction corresponding to control the motor drive unit based on the current position of the vehicle's electric seat and the second target position contained in the second position adjustment instruction.

3. The electronic control device for an electric car seat as described in claim 1, characterized in that, The microcontroller is also connected to the original seat control switch of the car's electric seat to control the motor drive unit to drive the drive motor in response to the control signal of the seat control switch. The microcontroller is connected to the power supply terminal and signal output terminal of the seat control switch with a power supply pin and a signal receiving pin respectively, or the microcontroller is connected to the signal output terminal of the seat control switch with only a signal receiving pin.

4. The electronic control device for an electric car seat as described in claim 1, characterized in that, The electronic control device also includes: A short-circuit protection module is installed between the original seat control switch and the control circuit of the drive motor of the automotive electric seat and is connected to the microcontroller. It is used to detect the working status of the microcontroller to disconnect the control circuit of the seat control switch and the drive motor when the microcontroller is working and to connect the control circuit of the seat control switch and the drive motor when the microcontroller stops working.

5. The electronic control device for an electric car seat as described in claim 4, characterized in that, The short-circuit protection module includes: The intelligent control unit, connected to the microcontroller, is used to detect the operating state of the microcontroller and output corresponding disconnect and connect signals when the microcontroller is working and stopped working; and A short-circuit control switch is installed in the control circuit between the seat control switch and the drive motor and is connected to the intelligent control unit. It is used to disconnect and connect the control circuit respectively in response to the disconnect signal and the conduction signal.

6. The electronic control device for an electric car seat as described in claim 5, characterized in that, The drive motor is connected to the vehicle's on-board power supply via the seat control switch. The short-circuit control switch is located in the power supply line between the on-board power supply and the seat control switch, or in the power supply line between the seat control switch and the drive motor.

7. The electronic control device for an electric car seat as described in claim 1, characterized in that, The electronic control device includes multiple motor drive and feedback modules for connecting and driving different drive motors, and each motor drive and feedback module is connected to the microcontroller.

8. The electronic control device for an electric car seat as described in claim 1, characterized in that, The electronic control device also includes: A power conversion module, connected to the vehicle's onboard power supply, is used to convert the initial voltage output by the onboard power supply into a predetermined operating voltage to power the various power modules of the electronic control device.

9. The electronic control device for an electric car seat as described in claim 1, characterized in that, The electronic control device also includes: The program upgrade module, connected to the microcontroller, is used to interact with external data sources to obtain upgrade data and upgrade the microcontroller; and The prompting module is connected to the microcontroller and is used to trigger an alarm prompt by the microcontroller when the microcontroller malfunctions or undergoes a data upgrade.

10. An electric car seat, comprising a seat body, a drive motor for adjusting the position of the seat body, and an electronic control device connected to the drive motor for controlling the operating state of the drive motor, characterized in that, The electronic control device is the electronic control device as described in any one of claims 1-9.

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