CN216486080U

CN216486080U - Vehicle and CAN bus module thereof

Info

Publication number: CN216486080U
Application number: CN202123330000.2U
Authority: CN
Inventors: 洪志超
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-05-10
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to a vehicle and CAN bus module (1) thereof, this vehicle is small-size freight vehicle, and this CAN bus module (1) is configured to make wheel speed sensor (2) and CAN bus (3) establish communication, including microprocessor unit (10), signal conversion unit (11) and CAN transceiver unit (12), wherein, signal conversion unit (11) receives the signal that comes from wheel speed sensor (2) to convert the signal of wheel speed sensor (2) into the required message classification of microprocessor unit (10); the micro-processing unit (10) is used for controlling sending and receiving of data frames according to a CAN bus protocol, the input end of the micro-processing unit is electrically connected with the signal conversion unit (11), the output end of the micro-processing unit is electrically connected with the CAN transceiving unit (12), the micro-processing unit (10) receives signals converted by the signal conversion unit (11), and the converted signals are processed and transmitted to the CAN transceiving unit (12).

Description

Vehicle and CAN bus module thereof

Technical Field

The utility model relates to a signal transmission field of vehicle especially relates to a vehicle and CAN (Controller Area Network) bus module thereof.

Background

The CAN network is a controller area network, and belongs to the field of industrial field buses. Compared with a general communication bus, the data communication of the CAN bus has outstanding reliability, instantaneity and flexibility. Due to its good performance and unique design, the CAN bus is more and more valued by people. The present invention is most widely applied in the field of automobiles, and a CAN bus is generally used to implement data communication between an automobile internal control system and various detection and execution mechanisms, for example, a wheel speed sensor outputs wheel speed information of a vehicle to the CAN bus in real time through an anti-lock brake system (ABS) or an electronic stability control system (ESP).

For the e-commerce industry, more and more e-commerce companies and logistics companies are beginning to favor small-sized freight vehicles (hereinafter, simply referred to as small-sized freight vehicles) that can be driven automatically or manually for the last kilometer of delivery service. The small freight vehicle has high randomness and high activity, and is suitable for entering various districts, office buildings and other places for delivery.

Generally, the running speed of the small freight car is lower than 15 km/h, and an active safety function such as an anti-lock brake system or an electronic stability control system configured by a traditional vehicle is not required to be equipped, so that signals of a wheel speed sensor of the small freight car cannot be transmitted to a CAN bus.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a vehicle and a CAN bus module thereof, which CAN establish communication between a wheel speed sensor and a CAN bus.

First, according to an aspect of the present invention, it provides a CAN bus module for a small freight vehicle, characterized in that the CAN bus module is configured to enable a wheel speed sensor to establish communication with a CAN bus, and includes a micro processing unit, a signal conversion unit and a CAN transceiver unit, wherein the signal conversion unit receives a signal from the wheel speed sensor and converts the signal of the wheel speed sensor (2) into a message category required by the micro processing unit; the micro-processing unit is used for controlling the sending and receiving of data frames according to a CAN bus protocol, the input end of the micro-processing unit is electrically connected with the signal conversion unit, the output end of the micro-processing unit is electrically connected with the CAN transceiving unit, the micro-processing unit receives signals converted by the signal conversion unit, and the converted signals are transmitted to the CAN transceiving unit after being processed.

According to another aspect of the present invention, it provides a vehicle, including a wheel speed sensor, a CAN bus and the CAN bus module described above, wherein the CAN bus module connects the wheel speed sensor and the CAN bus.

Compared with the prior art, according to the utility model provides a vehicle CAN be on the vehicle that is not equipped with anti-lock braking system or electronic stability control system owing to have CAN bus module, makes the fast sensor of wheel and CAN bus establish communication.

Drawings

Other features, details and advantages of the present invention will become more fully apparent from the following detailed description of the embodiments of the invention, taken in conjunction with the accompanying drawings. Wherein:

fig. 1 shows a block diagram of a CAN bus module according to the present invention, wherein the connection relationship between the CAN bus module and a wheel speed sensor and a CAN bus is shown.

Detailed Description

The following description is of some of the several embodiments of the present invention in order to provide a basic understanding of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.

Referring to fig. 1, a CAN bus module 1 according to an embodiment of the present invention is configured to enable a wheel speed sensor 2 to establish communication with a CAN bus 3, and includes a microprocessor unit 10, a signal conversion unit 11 and a CAN transceiver unit 12, wherein the signal conversion unit 11 receives a signal from the wheel speed sensor 2 and converts the signal from the wheel speed sensor 2 into a message type required by the microprocessor unit 10, for example, converts the signal from the wheel speed sensor 2 from serial data to parallel data; the microprocessor unit 10 is used for controlling the sending and receiving of data frames according to the CAN bus protocol, and has an input end electrically connected to the signal conversion unit 11 and an output end electrically connected to the CAN transceiver unit 12. The micro-processing unit 10 receives the signal converted by the signal conversion unit 11, processes the converted signal, and transmits the processed signal to the CAN transceiver unit 12.

The number of the signal conversion units 11 is plural, and each signal conversion unit 11 is electrically connected to one wheel speed sensor 2. In the present embodiment, the small-sized cargo vehicle has four wheels each provided with one wheel speed sensor 2, and therefore the number of the signal conversion units 11 is four. The number of the signal conversion units 11 is set according to the actual wheel speed control demand and the number of wheels and wheel speed sensors.

The CAN bus module 1 further comprises a power supply unit 13, wherein the power supply unit 13 is electrically connected with the microprocessor unit 10, the signal conversion unit 11 and the CAN transceiving unit 12 and provides power for the microprocessor unit 10, the signal conversion unit 11 and the CAN transceiving unit 12. The power supply unit 13 is electrically connected to each signal conversion unit 11.

The CAN bus module 1 includes a circuit board 100, and the microprocessor unit 10, the signal conversion unit 11, the CAN transceiver unit 12, and the power supply unit 13 are disposed on the circuit board 100 and electrically connected to each other through a printed circuit or an electric wire.

The CAN bus module 1 includes a plurality of input interfaces 101 and a plurality of output interfaces 102, wherein the plurality of input interfaces 101 are electrically connected to the signal conversion units 11 respectively, and are used to establish electrical connection with the wheel speed sensors 2 through a plugging manner, the number of the input interfaces 101 corresponds to the number of the signal conversion units 11, and the output interfaces 102 are electrically connected to the CAN bus 3 through a plugging manner. Fig. 1 only schematically illustrates the connection relationship between the approximate positions of the input interface 101 and the output interface 102 and other elements, and the structures of the input interface 101 and the output interface 102 are well known to those skilled in the art and are not described herein.

The CAN bus module 1 includes a housing 103 having a receiving space formed therein, and fixedly receives the microprocessor unit 10, the signal conversion unit 11, the CAN transceiver unit 12, and the power supply unit 13 therein, and the input interface 101 and the output interface 102 are fixed to a side wall of the housing 103.

A vehicle includes a wheel speed sensor 2, a CAN bus 3 and the aforementioned CAN bus module 1, wherein the CAN bus module 1 connects the wheel speed sensor 2 and the CAN bus 3. The vehicle is a small freight vehicle capable of automatically driving or manually driving, the driving speed is lower than 15 km/h, and an anti-lock brake system or an electronic stability control system is not equipped.

Claims

1. A CAN bus module for a small cargo vehicle, characterized in that the CAN bus module (1) is configured to establish a wheel speed sensor (2) in communication with a CAN bus (3), and comprises a micro processing unit (10), a signal conversion unit (11) and a CAN transceiver unit (12), wherein the signal conversion unit (11) receives a signal from the wheel speed sensor (2) and converts the signal from the wheel speed sensor (2) into a message type required by the micro processing unit (10); the micro-processing unit (10) is used for controlling the sending and receiving of data frames according to a CAN bus protocol, the input end of the micro-processing unit is electrically connected with the signal conversion unit (11), the output end of the micro-processing unit is electrically connected with the CAN transceiving unit (12), the micro-processing unit (10) receives signals converted by the signal conversion unit (11), and the converted signals are processed and then transmitted to the CAN transceiving unit (12).

2. The CAN bus module of claim 1, wherein the number of the signal conversion units (11) is plural, and each signal conversion unit (11) is electrically connected to one wheel speed sensor (2).

3. The CAN bus module of claim 2, wherein the number of signal conversion units (11) is set according to the actual wheel speed control requirement and the number of wheels and wheel speed sensors.

4. The CAN bus module of claim 3, wherein the CAN bus module (1) comprises a power supply unit (13), and the power supply unit (13) is electrically connected with the microprocessor unit (10), the signal conversion unit (11) and the CAN transceiver unit (12) and supplies power to the microprocessor unit (10), the signal conversion unit (11) and the CAN transceiver unit (12).

5. The CAN bus module of claim 4, wherein the power supply unit (13) is electrically connected to each signal conversion unit (11).

6. The CAN bus module according to claim 5, wherein the CAN bus module (1) comprises a circuit board (100), and the microprocessor unit (10), the signal conversion unit (11), the CAN transceiver unit (12) and the power supply unit (13) are all disposed on the circuit board (100) and electrically connected by printed wires or electric wires.

7. The CAN bus module of claim 6, wherein the CAN bus module (1) comprises a plurality of input interfaces (101) and a plurality of output interfaces (102), the plurality of input interfaces (101) are electrically connected to the signal conversion units (11), the wheel speed sensor (2) is electrically connected to the signal conversion units (11) through the input interfaces (101) by plugging, the plurality of output interfaces (102) are electrically connected to the CAN bus (3), and the number of input interfaces (101) corresponds to the number of signal conversion units (11).

8. The CAN bus module according to claim 7, wherein the CAN bus module (1) comprises a housing (103), the housing (103) forms a receiving space for fixedly receiving the microprocessor unit (10), the signal conversion unit (11), the CAN transceiver unit (12), the circuit board (100) and the power supply unit (13) therein, and the input interface (101) and the output interface (102) are fixed on a side wall of the housing (103).

9. A vehicle comprising a wheel speed sensor (2), a CAN-bus (3) and a CAN-bus module (1) according to any of claims 1-8, wherein the CAN-bus module (1) connects the wheel speed sensor (2) and the CAN-bus (3).

10. The vehicle of claim 9, wherein the vehicle is a small cargo vehicle capable of automatic or manual operation, traveling at a speed of less than 15 km/h, and not equipped with an anti-lock braking system or an electronic stability control system.