Wheel speed signal processing system and vehicle

Abstract

The utility model discloses a wheel speed signal processing system and a vehicle. The wheel speed signal processing system comprises a first brake controller, a second brake controller, a first wheel speed sensor, a second wheel speed sensor, a third wheel speed sensor and a fourth wheel speed sensor. The first brake controller comprises a first microprocessor and a first switch; the second brake controller comprises a second microprocessor; the first wheel speed sensor and the second wheel speed sensor are respectively connected with the first switch, the first switch is connected with the first microprocessor and the second microprocessor, and the third wheel speed sensor and the fourth wheel speed sensor are respectively connected with the second microprocessor; wherein the first switch is connected with the first microprocessor and the second microprocessor in a switchable manner. According to the utility model, through the improvement of the electrical architecture, at least one of the two brake controllers can obtain all the wheel speed signals, so that the redundancy control of the wheel speed signals is satisfied.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle control systems, in particular to a wheel speed signal processing system and a vehicle. Background Art

[0002] With the rapid development of the automobile industry, vehicles are becoming more intelligent and automated, and the requirements for vehicle safety and driving stability are also increasing. Among them, the wheel speed sensor is one of the commonly used vehicle sensors, which can obtain wheel speed information in real time and transmit this information to the vehicle control system for corresponding control and adjustment.

[0003] Conventional vehicle control systems use a brake controller to collect and process various wheel speed signals and submit them to a microcontroller for signal processing. However, when a brake controller fails, the wheel speed processing function of the vehicle control system fails, and the functions of the electronic control system, such as the anti-lock braking system, fail, which will cause huge safety risks for autonomous vehicles. Therefore, how to improve the braking system of autonomous driving is a technical problem that technicians in this field need to solve. Utility Model Content

[0004] The utility model aims to provide a wheel speed signal processing system and a vehicle, and realizes redundant control of wheel speed sensor signals through an improved design of an electrical architecture.

[0005] According to a first aspect of an embodiment of the utility model, there is provided a wheel speed signal processing system, comprising a first brake controller, a second brake controller, a first wheel speed sensor, a second wheel speed sensor, a third wheel speed sensor and a fourth wheel speed sensor;

[0006] The first brake controller includes a first microprocessor and a first switch connected to the first microprocessor;

[0007] The second brake controller includes a second microprocessor;

[0008] The first wheel speed sensor and the second wheel speed sensor are connected to the first switch respectively, the first switch is also connected to the second microprocessor, and the third wheel speed sensor and the fourth wheel speed sensor are connected to the second microprocessor respectively;

[0009] The first switch is switchably connected to the first microprocessor and the second microprocessor.

[0010] A further improvement of the processing system of the utility model is that, when the vehicle is in normal working state, the first switch is connected to the second microprocessor, and the third wheel speed sensor and the fourth wheel speed sensor are electrically connected to the second microprocessor respectively.

[0011] A further improvement of the processing system of the utility model is that when the second brake controller is abnormal or fails, the first switch is connected to the first microprocessor so that the first wheel speed sensor and the second wheel speed sensor are electrically connected to the first microprocessor.

[0012] A further improvement of the processing system of the utility model is that the processing system of the wheel speed signal further includes a second switch connected to the second microprocessor, the second switch is also connected to the first microprocessor, and the third wheel speed sensor and the fourth wheel speed sensor are respectively connected to the second switch;

[0013] The second switch is switchably connected to the first microprocessor and the second microprocessor.

[0014] A further improvement of the processing system of the utility model is that the first brake controller determines whether the second brake controller is abnormal based on a state feedback signal of the second brake controller; and / or the second brake controller determines whether the first brake controller is abnormal based on a state feedback signal of the first brake controller.

[0015] A further improvement of the processing system of the utility model is that, when the processing system is not powered on, the first switch is connected to the second microprocessor so that the first wheel speed sensor and the second wheel speed sensor are electrically connected to the second microprocessor respectively; the second switch is connected to the first microprocessor so that the third wheel speed sensor and the fourth wheel speed sensor are electrically connected to the first microprocessor respectively.

[0016] A further improvement of the processing system of the utility model is that, when the processing system is powered on,

[0017] When it is confirmed that the second brake controller is normal, controlling the second switch to be connected to the second microprocessor so that the first wheel speed sensor, the second wheel speed sensor, the third wheel speed sensor and the fourth wheel speed sensor are all electrically connected to the second microprocessor;

[0018] When the second brake controller is confirmed to be abnormal, the first switch is controlled to be connected to the first microprocessor so that the first wheel speed sensor, the second wheel speed sensor, the third wheel speed sensor and the fourth wheel speed sensor are all electrically connected to the first microprocessor.

[0019] A further improvement of the processing system of the utility model is that the first switch and the second switch are two-way switches, the first wheel speed sensor and the second wheel speed sensor are respectively connected to one way of the first switch, and the third wheel speed sensor and the fourth wheel speed sensor are respectively connected to one way of the second switch.

[0020] A further improvement of the processing system of the present invention is that the processing system further includes a communication bus connecting the first brake controller and the second brake controller, which is used for communication between the first brake controller and the second brake controller.

[0021] According to a second aspect of an embodiment of the utility model, a vehicle is provided, comprising a wheel speed signal processing system as described in any one of the above.

[0022] The wheel speed signal processing system of the utility model is designed with two brake controllers to perform redundant brake control on the vehicle. Each brake controller is connected to a wheel speed sensor, and the wheel speed signals can be switched according to different application scenarios so that at least one of the two brake controllers can obtain all wheel speed signals, thereby satisfying redundant control of the wheel speed signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is described in detail below through exemplary embodiments with reference to the accompanying drawings, wherein:

[0024] Figure 1 A structural block diagram of a wheel speed signal processing system provided by an embodiment of the utility model is shown;

[0025] Figure 2 A partial structural block diagram showing a normal working state of a vehicle provided by an embodiment of the utility model;

[0026] Figure 3 A partial structural block diagram showing the working state of the processing system when an abnormality or failure occurs in the second brake controller provided by an embodiment of the utility model;

[0027] Figure 4 A partial structural block diagram of a vehicle provided by an embodiment of the utility model when it is not powered on is shown;

[0028] Figure 5 A partial structural block diagram showing the state of a vehicle after power-on provided by an embodiment of the utility model;

[0029] Figure 6 A partial structural block diagram of a processing system working state when an abnormality or failure occurs in a second brake controller provided by another embodiment of the utility model is shown.

[0030] The accompanying drawings are only schematic and not necessarily drawn to scale, and they only show those parts necessary to illustrate the utility model, while other parts may be omitted or only briefly mentioned. That is, in addition to the parts shown in the accompanying drawings, the utility model may also include other parts. DETAILED DESCRIPTION

[0031] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0032] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0033] In the description of this embodiment, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0034] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0035] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0036] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Figure 1 A structural block diagram of a wheel speed signal processing system provided by an embodiment of the utility model is shown; Figure 2 A partial structural block diagram showing a normal working state of a vehicle provided by an embodiment of the utility model; Figure 3 A partial structural block diagram of a vehicle initialization test phase provided by an embodiment of the utility model is shown.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The wheel speed signal processing system of the embodiment of the utility model is applied to a vehicle to meet the high-level automatic driving of the vehicle. The wheel speed signal processing system includes a first brake controller 10, a second brake controller 20, a first wheel speed sensor 31, a second wheel speed sensor 32, a third wheel speed sensor 33 and a fourth wheel speed sensor 34. In the embodiment of the utility model, the first brake controller 10 is a redundant controller, and the second brake controller 20 is a main controller. The first brake controller 10 is also connected to the second brake controller by hydraulic pressure. Of course, in other embodiments, the first brake controller 10 can also be the main controller, and the second brake controller 20 can be a redundant controller.

[0039] The first brake controller 10 and the second brake controller 20 are connected to different power supplies respectively, and both have independent circuits, thereby realizing redundant power supply. Figure 1 In the embodiment, the first power supply 101 is connected to the first brake controller 10 , and the second power supply 102 is connected to the second brake controller 20 .

[0040] In addition, the processing system of the present invention further includes a communication bus BUS connecting the first brake controller 10 and the second brake controller 20. The communication bus BUS is used for communication between the first brake controller and the second brake controller, so that the two brake controllers can realize signal interaction and obtain each other's abnormal signals, thereby satisfying the redundant control of the processing system of the present invention.

[0041] The first brake controller 10 includes a first microprocessor 11 and a first switch S1 connected to the first microprocessor 11, the second brake controller 20 includes a second microprocessor 21, a first wheel speed sensor 31 and a second wheel speed sensor 32 are respectively connected to the first switch S1, the first switch S1 is also connected to the second microprocessor 21, and a third wheel speed sensor 33 and a fourth wheel speed sensor 34 are respectively connected to the second microprocessor 21. The first switch S1 is switchably connected to the first microprocessor 11 and the second microprocessor 21, and the first wheel speed sensor 31 and the second wheel speed sensor 32 are controlled to be connected to the first microprocessor 11 or the second microprocessor 21, or the third wheel speed sensor 33 and the fourth wheel speed sensor 34 are controlled to be connected to the first microprocessor 11 by switching the first switch S1.

[0042] like Figure 2 As shown, when the vehicle is in a normal working state, the first switch S1 is connected to the second microprocessor 21, and the third wheel speed sensor 33 and the fourth wheel speed sensor 34 are electrically connected to the second microprocessor 21 respectively. Since the first wheel speed sensor 31 and the second wheel speed sensor 32 are respectively connected to the first switch S1, when the first switch S1 is connected to the second microprocessor 21, the first wheel speed sensor 31 and the second wheel speed sensor 32 are electrically connected to the second microprocessor 21, so that the second microprocessor 21 can obtain the wheel speed signals of the first wheel speed sensor 31 and the second wheel speed sensor 32. In this way, when the vehicle is in a normal working state, the second brake controller 20 can obtain all the signals of the four wheel speed sensors, and at this time, even if there is an abnormality in the first brake controller 10, it has no effect on the processing system of the utility model.

[0043] like Figure 3 As shown, the first brake controller 10 and the second brake controller 20 have a good communication connection through the bus BUS. When the second brake controller 20 is abnormal or fails, the first switch S1 is connected to the first microprocessor 11 to obtain the wheel speed signals of the first wheel speed sensor 31 and the second wheel speed sensor 32, so that the first brake controller 10 can use the wheel speed signals of the first wheel speed sensor 31 and the second wheel speed sensor 32.

[0044] The first switch S1 is a two-way switch, and the first wheel speed sensor 31 and the second wheel speed sensor 32 are respectively connected to one way of the first switch S1, so that when the first switch S1 is adjusted, the first wheel speed sensor 31 and the second wheel speed sensor 32 are switched at the same time. Of course, the first switch S1 can also be connected to a single wheel speed sensor, so as to switch the single wheel speed sensor, so as to be applied to two-wheeled vehicles or vehicles with single wheel detection.

[0045] In another embodiment of the present invention, Figure 1Combination Figures 4 to 6 The wheel speed signal processing system further includes a second switch S2 connected to the second microprocessor 21, the second switch S2 is also connected to the first microprocessor 11, and the third wheel speed sensor 33 and the fourth wheel speed sensor 34 are respectively connected to the second switch S2. The second switch S2 is switchably connected to the first microprocessor 11 and the second microprocessor 21. The second switch S2 can be a two-way switch, and the third wheel speed sensor 33 and the fourth wheel speed sensor 34 are each connected to one of the second switches S2, so that when the second switch S2 is adjusted, the third wheel speed sensor 33 and the fourth wheel speed sensor 34 can be connected to the first microprocessor 11 or the second microprocessor 21.

[0046] Further, the first brake controller 10 determines whether the second brake controller 20 is abnormal according to the state feedback signal of the second brake controller 20. And / or, the second brake controller 20 determines whether the first brake controller 10 is abnormal according to the state feedback signal of the first brake controller 10. And through the regulation of the switch and the bus BUS, the comprehensive control of the entire processing system is realized, so that the normal brake controller can receive four wheel speed signals, thereby realizing redundant control.

[0047] like Figure 4 As shown, when the processing system is not powered on, the first switch S1 is connected to the second microprocessor 21, so that the first wheel speed sensor 31 and the second wheel speed sensor 32 are respectively electrically connected to the second microprocessor 21. The second switch S2 is connected to the first microprocessor 11, so that the third wheel speed sensor 33 and the fourth wheel speed sensor 34 are respectively electrically connected to the first microprocessor 11.

[0048] like Figure 5 As shown, when the processing system is powered on, the function of the second brake controller 20 is first tested. When it is confirmed that the second brake controller 20 is normal, the first switch S1 remains in the default state, and the second switch S2 is controlled to be connected to the second microprocessor 21, so that the first wheel speed sensor 31, the second wheel speed sensor 32, the third wheel speed sensor 33 and the fourth wheel speed sensor 34 are all electrically connected to the second microprocessor 21. At this time, the second brake controller 20 can obtain signals from the four wheel speed sensors.

[0049] like Figure 6As shown, when the second brake controller 20 is abnormal or fails, the first switch S1 is connected to the first microprocessor 11, so that the first microprocessor 11 is electrically connected to the first wheel speed sensor 31 and the second wheel speed sensor 32, and the second switch S2 remains in the default state. At this time, the second switch S2 is connected to the first microprocessor 11, so that the first microprocessor 11 is electrically connected to the third wheel speed sensor 33 and the fourth wheel speed sensor 34, so that the first microprocessor 11 can receive the wheel speed signals of the four wheel speed sensors at the same time.

[0050] The wheel speed signal processing system of the utility model improves the electrical architecture so that at least one of the two brake controllers can obtain all wheel speed signals, thereby satisfying the redundant control of the wheel speed signals. Specifically, the wheel speed signal processing system is designed with two brake controllers, the main brake controller is used to control the vehicle under normal working conditions, and the redundant brake controller is used to control the vehicle in the event of failure of the main brake controller, so as to achieve redundant braking control of the vehicle. The main brake controller is communicatively connected to the redundant brake controller, each brake controller is connected to a wheel speed sensor, and according to different application scenarios, the wheel speed signal can be switched so that at least one of the two brake controllers can obtain all wheel speed signals, thereby satisfying the redundant control of the wheel speed signal.

[0051] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A wheel speed signal processing system, characterized in that: It includes a first brake controller, a second brake controller, a first wheel speed sensor, a second wheel speed sensor, a third wheel speed sensor and a fourth wheel speed sensor; The first brake controller includes a first microprocessor and a first switch connected to the first microprocessor; The second brake controller includes a second microprocessor; The first wheel speed sensor and the second wheel speed sensor are connected to the first switch respectively, the first switch is also connected to the second microprocessor, and the third wheel speed sensor and the fourth wheel speed sensor are connected to the second microprocessor respectively; The first switch is switchably connected to the first microprocessor and the second microprocessor.

2. The processing system according to claim 1, characterized in that When the vehicle is in a normal working state, the first switch is connected to the second microprocessor, and the third wheel speed sensor and the fourth wheel speed sensor are electrically connected to the second microprocessor respectively.

3. The processing system according to claim 1, characterized in that When the second brake controller is abnormal or fails, the first switch is connected to the first microprocessor so that the first wheel speed sensor and the second wheel speed sensor are electrically connected to the first microprocessor.

4. The processing system according to claim 1, characterized in that The wheel speed signal processing system further includes a second switch connected to the second microprocessor, the second switch is also connected to the first microprocessor, and the third wheel speed sensor and the fourth wheel speed sensor are respectively connected to the second switch; The second switch is switchably connected to the first microprocessor and the second microprocessor.

5. The processing system according to claim 4, characterized in that The first brake controller determines whether the second brake controller is abnormal based on a state feedback signal of the second brake controller; and / or the second brake controller determines whether the first brake controller is abnormal based on a state feedback signal of the first brake controller.

6. The processing system according to claim 5, characterized in that When the processing system is not powered on, the first switch is connected to the second microprocessor so that the first wheel speed sensor and the second wheel speed sensor are electrically connected to the second microprocessor respectively; the second switch is connected to the first microprocessor so that the third wheel speed sensor and the fourth wheel speed sensor are electrically connected to the first microprocessor respectively.

7. The processing system according to claim 6, characterized in that When the processing system is powered on, When it is confirmed that the second brake controller is normal, controlling the second switch to be connected to the second microprocessor so that the first wheel speed sensor, the second wheel speed sensor, the third wheel speed sensor and the fourth wheel speed sensor are all electrically connected to the second microprocessor; When the second brake controller is confirmed to be abnormal, the first switch is controlled to be connected to the first microprocessor so that the first wheel speed sensor, the second wheel speed sensor, the third wheel speed sensor and the fourth wheel speed sensor are all electrically connected to the first microprocessor.

8. The processing system according to claim 4, characterized in that The first switch and the second switch are two-way switches, the first wheel speed sensor and the second wheel speed sensor are respectively connected to one way of the first switch, and the third wheel speed sensor and the fourth wheel speed sensor are respectively connected to one way of the second switch.

9. The processing system according to claim 1, characterized in that The processing system further includes a communication bus connecting the first brake controller and the second brake controller for communication between the first brake controller and the second brake controller.

10. A vehicle, characterized in that: A wheel speed signal processing system comprising the wheel speed signal as claimed in any one of claims 1 to 9.

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