Vehicle-mounted six-axis gyroscope circuit

Abstract

The utility model discloses a vehicle-mounted six-axis gyroscope circuit which is provided with a six-axis IMU (Inertial Measurement Unit), a first filtering unit, a second filtering unit, a main control unit and a power supply unit, wherein the six-axis IMU unit is used for collecting preset data information of a vehicle, the power supply unit is connected with a power supply input interface of the main control unit, a power supply input interface of the six-axis IMU unit and an IO port power supply interface of the six-axis IMU unit, and the first filtering unit is connected to the IO port power supply interface of the six-axis IMU unit. The preset data information acquired by the six-axis IMU unit can be accurately and stably transmitted to the main control unit; meanwhile, the second filtering unit is connected with the power supply input interface of the six-axis IMU in parallel, so that the six-axis IMU is in a reliable and stable working state; therefore, the technical problems of low accuracy and poor stability of data information transmission when the vehicle-mounted gyroscope works in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gyroscopes, in particular to a vehicle-mounted six-axis gyroscope circuit. Background Art

[0002] With the rapid development of the automobile manufacturing industry, the functional diversity and safety of automobiles are also constantly improving. Among them, the on-board gyroscope is an important on-board data information collection device, and its working stability and accuracy are important factors in maintaining the normal operation of the vehicle. In the related technology, when the on-board gyroscope is installed and applied, during its operation, due to the possible instability of the on-board power supply and the mutual influence between the on-board electronic devices, it is easy to cause errors in the working accuracy of the on-board gyroscope, which in turn has an adverse effect on the final control of the vehicle. Therefore, technical personnel in this field urgently need to solve the technical problem of poor working accuracy of the on-board gyroscope during the application process. Utility Model Content

[0003] The utility model provides a vehicle-mounted six-axis gyroscope circuit to solve the technical problems of poor working accuracy and poor stability of the vehicle-mounted gyroscope in the related technology.

[0004] The utility model discloses a vehicle-mounted six-axis gyroscope circuit, which comprises:

[0005] Six-axis IMU unit, used to collect preset data information of the vehicle;

[0006] A first filtering unit, wherein the first filtering unit is connected to an IO port power supply interface of the six-axis IMU unit;

[0007] A main control unit, connected to the six-axis IMU unit, for receiving the preset data information and controlling the working state of the six-axis IMU unit;

[0008] A power supply unit, wherein the output end of the power supply unit is respectively connected to the power supply input interface of the main control unit, the IO port power supply interface of the six-axis IMU unit, and the power supply input interface of the six-axis IMU unit, and is used to provide working voltage for the main control unit and the six-axis IMU unit respectively;

[0009] A second filtering unit, wherein the second filtering unit is connected in parallel with the power supply input interface of the six-axis IMU unit; a first end of the second filtering unit is respectively connected to the power supply input interface of the six-axis IMU unit and the output end of the power supply unit, and a second end of the second filtering unit is connected to a power ground.

[0010] The vehicle-mounted six-axis gyroscope circuit of the utility model embodiment has at least the following beneficial effects:

[0011] The utility model embodiment is a vehicle-mounted six-axis gyroscope circuit, which is provided with a six-axis IMU unit, a first filtering unit, a second filtering unit, a main control unit and a power supply unit; wherein the six-axis IMU unit is used to collect preset data information of the vehicle, and the power supply unit is respectively connected to the power supply input interface of the main control unit, the power supply input interface of the six-axis IMU unit, and the IO port power supply interface of the six-axis IMU unit, and by connecting the first filtering unit to the IO port power supply interface of the six-axis IMU unit, the preset data information collected by the six-axis IMU unit can be accurately and stably transmitted to the main control unit; at the same time, the second filtering unit is connected in parallel with the power supply input interface of the six-axis IMU unit, so that the six-axis IMU unit is in a reliable and stable working state; thereby solving the technical problems of low accuracy and poor stability of data information transmission when the vehicle-mounted gyroscope is working in the related technology, and providing a vehicle-mounted six-axis gyroscope circuit that can accurately and reliably transmit the collected preset data information.

[0012] According to some other embodiments of the vehicle-mounted six-axis gyroscope circuit of the present utility model, the first filtering unit includes a first capacitor, and the second filtering unit includes a second capacitor and a third capacitor;

[0013] The first end of the first capacitor is respectively connected to the output end of the power supply unit and the IO port power supply interface of the six-axis IMU unit, and the second end of the first capacitor is respectively connected to the ground end of the six-axis IMU unit and the power ground;

[0014] The first end of the second capacitor is respectively connected to the first end of the third capacitor, the power supply input interface of the six-axis IMU unit, and the output end of the power supply unit, and the second end of the second capacitor is respectively connected to the second end of the third capacitor and the power ground.

[0015] According to other embodiments of the vehicle-mounted six-axis gyroscope circuit of the present utility model, the first capacitor, the second capacitor, and the third capacitor are all chip capacitors in 0201 package.

[0016] According to some other embodiments of the vehicle-mounted six-axis gyroscope circuit of the present utility model, the power supply unit includes an LDO circuit and an LDO compensation circuit;

[0017] The input end of the LDO circuit is connected to an external power supply, and the output end of the LDO circuit is respectively connected to the power supply input interface of the main control unit, the IO port power supply interface of the six-axis IMU unit, and the power supply input interface of the six-axis IMU unit;

[0018] The first end of the LDO compensation circuit is connected to the input end of the LDO circuit, and the second end of the LDO compensation circuit is connected to the output end of the LDO circuit.

[0019] According to some other embodiments of the vehicle-mounted six-axis gyroscope circuit of the present utility model, the LDO compensation circuit includes a fourth capacitor and a fifth capacitor;

[0020] The first end of the fourth capacitor is connected to the input end of the LDO circuit, the first end of the fifth capacitor is connected to the output end of the LDO circuit, and the second end of the fourth capacitor is connected to the second end of the fifth capacitor and the power ground respectively.

[0021] According to some other embodiments of the vehicle-mounted six-axis gyroscope circuit of the present utility model, the fourth capacitor and the fifth capacitor are both chip capacitors in 0201 package.

[0022] According to other embodiments of the present invention, the vehicle-mounted six-axis gyroscope circuit further includes a noise reduction and voltage stabilization unit;

[0023] A first end of the noise reduction and voltage stabilization unit is connected to the output end of the power supply unit, and a second end of the noise reduction and voltage stabilization unit is connected to a power ground.

[0024] According to some other embodiments of the vehicle-mounted six-axis gyroscope circuit of the present utility model, the noise reduction and voltage stabilization unit includes a sixth capacitor, a seventh capacitor, an eighth capacitor and a ninth capacitor;

[0025] The first end of the sixth capacitor, the first end of the seventh capacitor, the first end of the eighth capacitor, and the first end of the ninth capacitor are respectively connected to the output end of the power supply unit, and the second end of the sixth capacitor, the second end of the seventh capacitor, the second end of the eighth capacitor, and the second end of the ninth capacitor are all connected to the power ground.

[0026] According to some other embodiments of the vehicle-mounted six-axis gyroscope circuit of the present invention, the main control unit includes an MCU, and the MCU is provided with an SPI interface, a UART interface and a SWD interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the module composition of the first embodiment of a vehicle-mounted six-axis gyroscope circuit of the utility model;

[0028] Figure 2 This is a schematic diagram of the module composition of the second embodiment of a vehicle-mounted six-axis gyroscope circuit of the utility model;

[0029] Figure 3 This is a schematic diagram of the module composition of the third embodiment of a vehicle-mounted six-axis gyroscope circuit of the utility model;

[0030] Figure 4 This is a schematic diagram of the circuit structure of a specific embodiment of a main control unit in a vehicle-mounted six-axis gyroscope circuit according to an embodiment of the utility model;

[0031] Figure 5 This is a circuit structure diagram of a specific embodiment of a six-axis IMU unit in a vehicle-mounted six-axis gyroscope circuit of the utility model;

[0032] Figure 6 This is a circuit structure diagram of a specific embodiment of a power supply unit in a vehicle-mounted six-axis gyroscope circuit according to an embodiment of the utility model;

[0033] Figure 7 The utility model is a circuit structure diagram of a specific embodiment of a noise reduction and voltage stabilization unit in a vehicle-mounted six-axis gyroscope circuit. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the concept of the utility model and the technical effects produced by the embodiments, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model.

[0035] In the description of the embodiments of the present utility model, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than" or "exceed" is involved, it should be understood as not including the number itself, if "above", "below" or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] Reference Figure 1The embodiment of the utility model provides a vehicle-mounted six-axis gyroscope circuit, which includes a six-axis IMU unit, a first filtering unit, a second filtering unit, a main control unit and a power supply unit; wherein the output end of the power supply unit is respectively connected to the power supply input interface of the six-axis IMU unit, the IO port power supply interface of the six-axis IMU unit, and the power supply input interface of the main control unit, and is used to provide a working voltage for the main control unit and the six-axis IMU unit. At the same time, the first filtering unit is set to be connected to the IO port power supply interface of the six-axis IMU unit, so as to provide a stable and reliable working voltage for the IO interface of the six-axis IMU unit, so that the preset data information (usually including the vehicle's attitude data information and positioning information) collected by the six-axis IMU unit can be accurately and reliably sent to the main control unit through the IO interface, and can respond to the control information sent by the main control unit in a timely manner. In addition, in order to make the six-axis IMU unit in a reliable and stable working state, so as to collect accurate preset data information (including attitude data information and positioning information), it is also necessary to provide it with a stable and reliable working voltage. Therefore, the vehicle-mounted six-axis gyroscope circuit in this embodiment also includes a second filtering unit. Among them, the first end of the second filter unit is respectively connected to the power supply input interface of the six-axis IMU unit and the output end of the power supply unit, and the second end of the second filter unit is connected to the power ground, so that the second filter unit is connected in parallel with the power supply input interface of the six-axis IMU unit. When the power supply unit provides the working voltage to the six-axis IMU unit, the six-axis IMU unit is provided with a complete, accurate and stable working voltage after filtering by the second filter unit, so as to ensure that the six-axis IMU unit can be in a normal working state to collect accurate preset data information. The embodiment of the utility model provides a vehicle-mounted six-axis gyroscope circuit, which solves the technical problems of low accuracy and poor stability of data information transmission when the vehicle-mounted gyroscope is working in the related technology, and provides a vehicle-mounted six-axis gyroscope circuit that can accurately and reliably transmit the collected preset data information.

[0037] Reference Figure 2 In some embodiments, in order to ensure the stable and reliable power supply of the power supply unit, in this embodiment, the power supply unit includes an LDO circuit and an LDO compensation circuit. Among them, the input end of the LDO circuit is connected to the external power supply, and the output end of the LDO circuit is respectively connected to the power supply input interface of the main control unit, the IO port power supply interface of the six-axis IMU unit, and the power supply input interface of the six-axis IMU unit; the first end of the LDO compensation circuit is connected to the input end of the LDO circuit, and the second end of the LDO compensation circuit is connected to the output end of the LDO circuit. Furthermore, by providing an LDO compensation circuit, the input and output voltages of the LDO circuit have good stability, thereby ensuring that subsequent electrical devices can work reliably, and stable power supply can effectively extend the service life of each electrical device.

[0038] Reference Figure 3In some embodiments, in order to reduce the impact of power supply noise on the entire circuit and further stabilize the voltage output by the power supply unit, the on-board six-axis gyroscope circuit also includes a noise reduction and voltage stabilization unit. In this embodiment, one end of the noise reduction and voltage stabilization unit is connected to the output end of the power supply unit, and the other end of the noise reduction and voltage stabilization unit is connected to the power ground. By connecting the noise reduction and voltage stabilization unit to the output end of the power supply unit, the voltage output by the power supply unit is effectively reduced in noise and stabilized, providing a stable working voltage for subsequent electrical devices.

[0039] In some embodiments, in order to improve the applicability of the vehicle-mounted six-axis gyroscope circuit of the embodiment of the utility model, the main control unit includes an MCU, wherein the MCU is provided with an SPI interface, a URT interface, a SWD interface, etc., and by providing multiple types of interfaces, an interface for data communication interaction with external devices is provided, thereby enhancing the expansibility and flexibility of the vehicle-mounted six-axis gyroscope circuit.

[0040] Reference Figures 4 to 7 The following is a specific implementation method of the component units or circuits described in the above embodiments in practical applications through a specific embodiment. It should be noted that the scope of protection of the vehicle-mounted six-axis gyroscope circuit of the utility model is not limited to the description of the embodiment, but also includes simple changes and substitutions based on this principle to obtain implementation methods, which all fall within the protection scope of the vehicle-mounted six-axis gyroscope circuit of the utility model.

[0041] Specifically, refer to Figure 4 The main control unit includes an MCU of the N32L403k8Q7 model, which is provided with an SPI interface, a URT interface and a SWD interface. The SPI interface is connected to the six-axis IMU unit to control the working state of the six-axis IMU unit and receive preset data information sent by the six-axis IMU unit. The power input interface VDD of the main control unit is connected to the output terminal 3.3V of the power supply unit. Figure 5 The six-axis IMU unit includes an IMU of model ICM-42605, the first filtering unit includes a first capacitor C1, and the second filtering unit includes a second capacitor C2 and a third capacitor C3; wherein the first end of the first capacitor C1 is respectively connected to the output end of the power supply unit and the IO port power supply interface VDDIO of the six-axis IMU unit, the second end of the first capacitor C1 and the ground end GDN of the six-axis IMU unit are both connected to the power ground GND, the first end of the second capacitor C2 is respectively connected to the first end of the third capacitor C3, the power input interface VDD of the six-axis IMU unit, and the output end of the power supply unit, and the second end of the second capacitor C2 and the second end of the third capacitor C3 are both connected to the power ground GND. Reference Figure 6The power supply unit includes an LDO circuit and an LDO compensation circuit. Specifically, the LDO circuit includes an LDO chip of model PST6232, and the LDO compensation circuit includes a fourth capacitor C15 and a fifth capacitor C16; wherein the input terminal VIN of the LDO chip is respectively connected to the external power supply 5V, the first terminal of the fourth capacitor C15, and the enable terminal of the LDO chip, the first terminal of the fifth capacitor C16 is connected to the output terminal VOUT of the LDO chip, and the second terminal of the fifth capacitor C16 and the second terminal of the fourth capacitor C15 are both connected to the power ground GND. Figure 7 The noise reduction and voltage stabilization unit includes a sixth capacitor C11, a seventh capacitor C12, an eighth capacitor C13 and a ninth capacitor C14; wherein, the first end of the sixth capacitor C11, the first end of the seventh capacitor C12, the first end of the eighth capacitor C13 and the first end of the ninth capacitor C14 are respectively connected to the output end VOUT of the LDO chip, and the second end of the sixth capacitor C11, the second end of the seventh capacitor C12, the second end of the eighth capacitor C13 and the second end of the ninth capacitor C14 are all connected to the power ground GND, and then the 3.3V voltage output by the output end VOUT of the LDO chip is output to the power supply input interface VDD of the MCU, the IO port power supply interface VDDIO of the six-axis IMU unit, and the power supply input interface VDD of the six-axis IMU unit after noise reduction and voltage stabilization, providing a stable and reliable voltage for the operation of the MCU and the six-axis IMU unit. In the present embodiment, since the vehicle-mounted six-axis gyroscope circuit proposed in the embodiment of the utility model is applied in a vehicle, in order to save installation space and without losing the function of the device, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C15, the fifth capacitor C16, the sixth capacitor C11, the seventh capacitor C12, the eighth capacitor C13 and the ninth capacitor C14 described in the above embodiments are all 0201 packaged chip capacitors.

[0042] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A vehicle-mounted six-axis gyroscope circuit, comprising a six-axis IMU unit, a power supply unit and a main control unit, wherein the six-axis IMU unit is used to collect preset data information of the vehicle; the main control unit is connected to the six-axis IMU unit, and is used to receive the preset data information and control the working state of the six-axis IMU unit; the output end of the power supply unit is respectively connected to the power supply input interface of the main control unit, the IO port power supply interface of the six-axis IMU unit, and the power supply input interface of the six-axis IMU unit, and is used to provide working voltage for the main control unit and the six-axis IMU unit respectively; characterized in that Also includes: A first filtering unit, wherein the first filtering unit is connected to an IO port power supply interface of the six-axis IMU unit; A second filtering unit, wherein the second filtering unit is connected in parallel to a power supply input interface of the six-axis IMU unit; The first end of the second filtering unit is connected to the power supply input interface of the six-axis IMU unit and the output end of the power supply unit respectively, and the second end of the second filtering unit is connected to the power ground.

2. The vehicle-mounted six-axis gyroscope circuit according to claim 1, characterized in that: The first filtering unit includes a first capacitor, and the second filtering unit includes a second capacitor and a third capacitor; The first end of the first capacitor is respectively connected to the output end of the power supply unit and the IO port power supply interface of the six-axis IMU unit, and the second end of the first capacitor is respectively connected to the ground end of the six-axis IMU unit and the power ground; The first end of the second capacitor is respectively connected to the first end of the third capacitor, the power supply input interface of the six-axis IMU unit, and the output end of the power supply unit, and the second end of the second capacitor is respectively connected to the second end of the third capacitor and the power ground.

3. The vehicle-mounted six-axis gyroscope circuit according to claim 2, characterized in that: The first capacitor, the second capacitor and the third capacitor are all chip capacitors in 0201 package.

4. The vehicle-mounted six-axis gyroscope circuit according to any one of claims 1 to 3, characterized in that: The power supply unit includes an LDO circuit and an LDO compensation circuit; The input end of the LDO circuit is connected to an external power supply, and the output end of the LDO circuit is respectively connected to the power supply input interface of the main control unit, the IO port power supply interface of the six-axis IMU unit, and the power supply input interface of the six-axis IMU unit; The first end of the LDO compensation circuit is connected to the input end of the LDO circuit, and the second end of the LDO compensation circuit is connected to the output end of the LDO circuit.

5. The vehicle-mounted six-axis gyroscope circuit according to claim 4, characterized in that: The LDO compensation circuit includes a fourth capacitor and a fifth capacitor; The first end of the fourth capacitor is connected to the input end of the LDO circuit, the first end of the fifth capacitor is connected to the output end of the LDO circuit, and the second end of the fourth capacitor is connected to the second end of the fifth capacitor and the power ground respectively.

6. The vehicle-mounted six-axis gyroscope circuit according to claim 5, characterized in that: The fourth capacitor and the fifth capacitor are both 0201 packaged chip capacitors.

7. The vehicle-mounted six-axis gyroscope circuit according to any one of claims 1 to 3, characterized in that: It also includes a noise reduction and voltage stabilization unit; A first end of the noise reduction and voltage stabilization unit is connected to the output end of the power supply unit, and a second end of the noise reduction and voltage stabilization unit is connected to a power ground.

8. The vehicle-mounted six-axis gyroscope circuit according to claim 7, characterized in that: The noise reduction and voltage stabilization unit includes a sixth capacitor, a seventh capacitor, an eighth capacitor and a ninth capacitor; The first end of the sixth capacitor, the first end of the seventh capacitor, the first end of the eighth capacitor, and the first end of the ninth capacitor are respectively connected to the output end of the power supply unit, and the second end of the sixth capacitor, the second end of the seventh capacitor, the second end of the eighth capacitor, and the second end of the ninth capacitor are all connected to the power ground.

9. The vehicle-mounted six-axis gyroscope circuit according to any one of claims 1 to 3, characterized in that: The main control unit includes an MCU, and the MCU is provided with an SPI interface, a UART interface and a SWD interface.

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