Wheel speed measurement device based on an inertial measurement unit

Abstract

The utility model discloses a wheel speed measuring device based on inertia measurement unit does not use traditional relative wheel speed measuring mode any longer, but utilizes inertia measurement unit to obtain wheel speed, running speed, running mileage, running state and other information. Since the wheel speed measuring device adopts non-wired power supply, that is, does not obtain electric energy from the vehicle end through a wired line, and wireless data transmission, when installing and replacing the wheel speed measuring device, can be directly taken down and clamped, without needing other treatment to the wheel, reducing the installation obstacle of the wheel speed measuring device in popularization and use. The wheel speed measuring device can become a standard part batch production, and can be adapted to the wheels of various vehicles.

Description

Technical Field

[0001] This utility model relates to the field of vehicles, specifically to a wheel speed measuring device based on an inertial measurement unit. Background Technology

[0002] Vehicle speed is an important driving parameter. Vehicle speed is determined by the rotational speed of the wheels and the circumference of the wheels. Without considering factors such as tire deformation, the wheel circumference is generally considered to be a fixed value in precision measurements. Therefore, the measurement of vehicle speed is actually the measurement of wheel rotational speed.

[0003] Currently, automobiles mostly use relative sensors to measure the rotational speed of the wheels. Relative measurement sensors are generally installed on two parts: the vehicle's rotational axis (the part that does not rotate with the wheel) and the wheel itself. They measure the relative position change of the rotating part of the wheel relative to the stationary part through principles such as photoelectric encoders and the Hall effect, thereby measuring the wheel's rotational speed.

[0004] The application of relative wheel speed sensors has many limitations. First, the measurement resolution of relative wheel speed sensors is generally low, making them unsuitable for scenarios requiring high accuracy in wheel speed measurement. Second, the installation and replacement of relative wheel speed sensors require significant modifications to the vehicle's wheels, and the cost of repair and replacement in case of failure is high.

[0005] Therefore, how to provide a wheel speed measuring device with high measurement accuracy and convenient installation and use has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] According to one aspect of this utility model, a wheel speed measuring device based on an inertial measurement unit is disclosed, characterized in that it includes an inertial measurement unit, an upper cover base, an upper cover, and a wheel hub connector, wherein the inertial measurement unit includes one or more of a speedometer, an accelerometer, a gyroscope, and a magnetometer, and obtains one or more of the wheel's speed, acceleration, and spatial motion angle information; the inertial measurement unit is connected to the upper cover base, and the upper cover base is connected to the upper cover; the wheel hub connector includes a receiving cavity to accommodate the inertial measurement unit, and includes a support plate that locks with the upper cover base, and a plurality of buckles that engage with the wheel hub are provided in the opposite direction of the locking of the wheel hub connector and the upper cover base, so that the assembled wheel speed measuring device can be directly engaged in the central hole of the wheel hub.

[0007] In one embodiment, the top cover includes a solar panel to generate electricity from solar energy to power the inertial measurement unit.

[0008] In one embodiment, there is an electrical connection between the inertial measurement unit and the upper cover base, and between the upper cover base and the upper cover.

[0009] In one embodiment, the wheel speed measuring device further includes a counterweight block disposed on the support plate of the wheel hub connector.

[0010] In one embodiment, the inertial measurement unit includes a power supply module, a data processing module, and a data transmission module, and also includes one or more of a gyroscope, accelerometer, speedometer, and magnetometer. The power supply module is connected to other modules within the inertial measurement unit to provide power to those other modules.

[0011] In one embodiment, the power supply module includes a motor power generation component, which includes a stator, a rotor, and a shaft. The stator is fixed to the hub by screws, the shaft is fixed to the stator, and the rotor is fixedly connected to the inner surface of the upper cover base, so as to use the rotation of the wheel to drive the motor power generation component to generate electrical energy.

[0012] In one embodiment, the power supply module is powered by a solar panel placed in the top cover.

[0013] In one embodiment, a gyroscope, accelerometer, speedometer, and magnetometer are used to obtain one or more of the wheel's speed, acceleration, and spatial motion angle information, and are connected to a data processing module to send the obtained initial motion state information to the data processing module for processing and calculation to obtain one or more of the required wheel speed, driving speed, driving distance, and driving state information.

[0014] In one embodiment, the data processing module sends one or more of the wheel speed, driving speed, driving mileage, and driving status information obtained to the data transmission module, wherein the data transmission module is a wireless transmission module.

[0015] In one embodiment, the data transmission module wirelessly transmits one or more of the wheel speed, driving speed, driving mileage, and driving status information to one or more of the vehicle's wireless receiving port, user terminal, and back-end server.

[0016] This utility model discloses a wheel speed measuring device based on an inertial measurement unit (IMU). Instead of using the traditional relative wheel speed measurement method, it utilizes an IMU to obtain information such as wheel speed, driving speed, mileage, and driving status. Because the wheel speed measuring device uses a wireless power supply—that is, it does not draw power from the vehicle via wired lines—and wireless data transmission, it can be directly removed and engaged during installation and replacement without requiring any further processing of the wheel. This reduces installation obstacles during the promotion and use of the wheel speed measuring device. This wheel speed measuring device can be mass-produced as a standard part and is compatible with the wheels of various vehicles. Attached Figure Description

[0017] Figure 1A schematic diagram of a wheel speed measuring device based on an inertial measurement unit according to an embodiment of the present invention is provided;

[0018] Figure 2 Give Figure 1 A schematic diagram of the internal structure of the inertial measurement unit 101 in the wheel speed measurement device based on the inertial measurement unit in the embodiment shown. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below. It should be noted that the embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model. In the following description, numerous specific details are set forth in order to provide a thorough understanding of this utility model. However, it will be apparent to those skilled in the art that these specific details are not necessary to implement this utility model. In other instances, well-known circuits, materials, or methods have not been specifically described to avoid obscuring the utility model.

[0020] Throughout this specification, references to “an embodiment,” “an example,” or “an example” mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases “in an embodiment,” “in an embodiment,” “an example,” or “an example” appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes only and are not necessarily drawn to scale. It should be understood that when an element is referred to as “connected to” or “linked” to another element, it can be a direct connection or link to another element, or there may be intermediate elements. Conversely, when an element is referred to as “directly connected to” or “directly linked” to another element, there are no intermediate elements. The same reference numerals indicate the same elements. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Figure 1 A schematic diagram of a wheel speed measuring device based on an inertial measurement unit according to an embodiment of the present invention is provided. The wheel speed measuring device is installed in a wheel hub hole. The wheel speed measuring device includes an inertial measurement unit 101, an upper cover base 102, an upper cover 103, and a wheel hub connector 104.

[0022] The inertial measurement unit 101 includes one or more of a speedometer, accelerometer, gyroscope, and magnetometer to obtain information such as wheel speed, acceleration, and spatial motion angle. Through data processing and calculation, it obtains information such as wheel speed, driving speed, driving distance, and driving status required by the system.

[0023] The inertial measurement unit 101 is connected to the upper cover base 102. Depending on the actual needs, the connection between the inertial measurement unit 101 and the upper cover base 102 can be a locking connection, an electrical connection, or an integrated connection.

[0024] The upper cover base 102 is connected to the upper cover 103. Depending on the actual needs, the connection between the upper cover base 102 and the upper cover 103 can be a locking connection, an electrical connection, or an integrated connection. In one embodiment, the upper cover 103 includes a solar panel to generate electricity through solar energy to power the inertial measurement unit 101. In this embodiment, electrical connections are required between the inertial measurement unit 101 and the upper cover base 102, and between the upper cover base 102 and the upper cover 103.

[0025] In another embodiment, the inertial measurement unit 101 is powered mechanically, that is, by using the rotation of the wheels to drive a generator motor to generate electricity. In this embodiment, the inertial measurement unit 101 includes a motor-generator assembly.

[0026] In one embodiment, the wheel speed measuring device includes two power supply modes: solar power and mechanical power, so as to switch power supply when one power supply mode fails, thereby improving the stability and reliability of the equipment.

[0027] The hub connector 104 includes a receiving cavity to accommodate the inertial measurement unit 101, and includes a support plate that locks into the upper cover base 102. Multiple snap-fit ​​fasteners are provided in the opposite direction to the locking of the hub connector 104 and the upper cover base, engaging with the hub. This allows the assembled wheel speed measuring device to be directly engaged in the central hole of the hub.

[0028] Because the wheel speed measuring device uses a wired power supply, meaning it doesn't draw power from the vehicle via wired lines, it can be directly removed and engaged during installation and replacement without requiring any additional treatment of the wheel. This reduces installation obstacles during the promotion and use of the device. The wheel speed measuring device can be mass-produced as a standard part, making it compatible with the wheels of various vehicles.

[0029] In one embodiment, the wheel speed measuring device further includes a counterweight 105 disposed on the support plate of the wheel hub connector 104.

[0030] Figure 2 Give Figure 1The illustrated embodiment shows a schematic diagram of the internal structure of the inertial measurement unit 101 in the wheel speed measurement device based on the inertial measurement unit. (See diagram below.) Figure 2 As shown, the inertial measurement unit 101 includes, exemplarily, a power supply module 201, a gyroscope 202, an accelerometer 203, a speedometer 204, a magnetometer 205, a data processing module 206, and a data transmission module 207.

[0031] The power supply module 201 is connected to other modules within the inertial measurement unit to provide power to these modules. In one embodiment, the power supply module 201 includes a motor power generation assembly comprising a stator, a rotor, and a shaft. The stator is fixed to a wheel hub with screws, the shaft is fixed to the stator, and the rotor is fixedly connected to the inner surface of the upper cover base, thereby enabling the motor power generation assembly to generate electrical energy by rotating the wheel. In another embodiment, the power supply module 201 receives its electrical energy from a solar panel placed within the upper cover.

[0032] The gyroscope 202, accelerometer 203, speedometer 204, and magnetometer 205 serve as inertial measurement units and core functional components, used to obtain information such as wheel speed, acceleration, and spatial motion angle. They are connected to the data processing module 206 to send the obtained initial motion state information to the data processing module 206 for processing and calculation, so as to obtain information such as wheel speed, driving speed, driving distance, and driving status required by the system.

[0033] The data processing module 206 sends the acquired wheel speed, driving speed, mileage, driving status, and other information to the data transmission module 207. In one embodiment, the data transmission module 207 is a wireless transmission module that can support one or more communication modes selected from Bluetooth, Wi-Fi, Zigbee, NFC, and mobile communication. The data transmission module 207 wirelessly transmits the acquired wheel speed, driving speed, mileage, driving status, and other information to the vehicle's wireless receiving port, or to components such as user terminals or backend servers that need to obtain wheel speed-related information.

[0034] This utility model discloses a wheel speed measuring device based on an inertial measurement unit (IMU). Instead of using the traditional relative wheel speed measurement method, it utilizes an IMU to obtain information such as wheel speed, driving speed, mileage, and driving status. Because the wheel speed measuring device uses a wireless power supply—that is, it does not draw power from the vehicle via wired lines—and wireless data transmission, it can be directly removed and engaged during installation and replacement without requiring any further processing of the wheel. This reduces installation obstacles during the promotion and use of the wheel speed measuring device. This wheel speed measuring device can be mass-produced as a standard part and is compatible with the wheels of various vehicles.

[0035] As mentioned above, many changes can be made without departing from the spirit and scope of this invention. Therefore, the scope of this invention is not limited by the disclosure of the preferred embodiments. Rather, the invention should be determined entirely by reference to the following claims.

Claims

1. A wheel speed measuring device based on an inertial measurement unit, characterized in that, Includes an inertial measurement unit, a base cover, a top cover, and a hub connector, among which, The inertial measurement unit includes one or more of a speedometer, accelerometer, gyroscope, and magnetometer, and obtains one or more of the following information: wheel speed, acceleration, and spatial motion angle; the inertial measurement unit is connected to the upper cover base, and the upper cover base is connected to the upper cover. The hub connector includes a receiving cavity to accommodate the inertial measurement unit and a support plate that locks with the upper cover base. The hub connector is provided with multiple buckles that engage with the hub in the opposite direction of the engagement with the upper cover base, so that the assembled wheel speed measuring device can be directly engaged in the central hole of the hub.

2. The wheel speed measuring device based on an inertial measurement unit as described in claim 1, characterized in that, The top cover contains a solar panel to generate electricity from solar energy to power the inertial measurement unit.

3. The wheel speed measuring device based on an inertial measurement unit as described in claim 2, characterized in that, There is an electrical connection between the inertial measurement unit and the upper cover base, and between the upper cover base and the upper cover.

4. The wheel speed measuring device based on an inertial measurement unit as described in claim 1, characterized in that, The wheel speed measuring device also includes a counterweight, which is mounted on the support plate of the wheel hub connector.

5. The wheel speed measuring device based on an inertial measurement unit as described in claim 1, characterized in that, The inertial measurement unit includes a power supply module, a data processing module, and a data transmission module, and also includes one or more of a gyroscope, accelerometer, speedometer, and magnetometer. The power supply module is connected to other modules inside the inertial measurement unit to provide power to the other modules.

6. The wheel speed measuring device based on an inertial measurement unit as described in claim 5, characterized in that, The power supply module contains a motor power generation component, which includes a stator, a rotor, and a shaft. The stator is fixed to the hub with screws, the shaft is fixed to the stator, and the rotor is fixed to the inner surface of the upper cover base, so as to use the rotation of the wheel to drive the motor power generation component to generate electrical energy.

7. The wheel speed measuring device based on an inertial measurement unit as described in claim 5, characterized in that, The power supply module is powered by a solar panel placed in the top cover.

8. The wheel speed measuring device based on an inertial measurement unit as described in claim 5, characterized in that, Gyroscope, accelerometer, speedometer, and magnetometer are used to obtain one or more of the following information: wheel speed, acceleration, and spatial motion angle. They are connected to the data processing module to send the obtained initial motion state information to the data processing module for processing and calculation to obtain one or more of the following information: wheel speed, driving speed, driving distance, and driving status.

9. The wheel speed measuring device based on an inertial measurement unit as described in claim 8, characterized in that, The data processing module sends one or more of the wheel speed, driving speed, driving mileage, and driving status information to the data transmission module, which is a wireless transmission module.

10. The wheel speed measuring device based on an inertial measurement unit as described in claim 9, characterized in that, The data transmission module wirelessly transmits one or more of the wheel speed, driving speed, driving mileage, and driving status information to one or more of the vehicle's wireless receiving port, user terminal, and back-end server.

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