CN102029959A - Vehicle meter system using controller area network bus - Google Patents

Abstract

A vehicle meter system comprises a controller area network bus for transmitting a controller area network bus signal; and the first controller area network module is coupled with the controller area network bus and used for receiving the controller area network bus signal transmitted by the controller area network bus and converting the controller area network bus signal into an information signal. The vehicle instrument system further comprises an instrument panel and a processor coupled to the first controller area network module and the instrument panel, wherein the processor is used for receiving the information signal and controlling the instrument panel to display information corresponding to the information signal.

Description

Vehicle Instrumentation System Using Controller Area Network Bus

technical field

The invention relates to a vehicle instrument system, in particular to a vehicle instrument system using a controller local area network bus.

Background technique

Early vehicle instruments used the main shaft resistance of magnets and iron covers, and used non-magnetic good conductors (such as aluminum and copper) as pointer shaft rotors. The pointer shaft rotor, rotary force spring, totalizer, and transmission rotary gear are combined into an instrument head, so that the eddy current of the rotor interacts with the magnetic field of the permanent magnet, so that the rotor rotates to drive the pointer to rotate. Regardless of the information displayed by the pointer, light signal display or digital display device of the vehicle instrument, it receives the voltage signal or resistance signal of the general sensor. When the vehicle is running on a bumpy road, the instrument will shake or swing irregularly due to external vibration. In addition, the resolution of the induction coil is limited by the magnetic flux of the magnet, which cannot improve the resolution of the instrument indication.

In recent years, each system unit of a vehicle has gradually adopted electronic devices. Traditional vehicle instrumentation, warning lights or display devices, in the high interference environment of many electronic components, to maintain correct data transmission is one of the main problems of various types of vehicles. In addition, the wiring of sensing devices, data transmission issues, and system maintenance services for various systems on the vehicle are also relatively complicated. Traditional instrumentation devices are obviously not compatible with the new generation of electronic systems.

The main disadvantage of the traditional vehicle instrument is that the pointer of the meter rotates and drives the pointer through the magnetic flux induction rotor. Therefore, the external vibration of the vehicle will affect the rotation of the pointer, so that the rotation accuracy is limited by the magnetic flux value, which is not conducive to control and speed regulation. Moreover, the magnetic flux control is an analog control method and cannot be applied to digital electronic systems. In addition, due to the limitation of signal resolution, traditional vehicle meters cannot be compatible with vehicles with vehicle communication network systems, nor can they receive and analyze data, and have no data processing functions. Therefore, the function design of the traditional vehicle instrument has no expandability, and is limited to the manufacturer's factory settings, which cannot be modified for use in other types of vehicles, which greatly limits the scalability and variability of the traditional vehicle instrument.

Contents of the invention

The object of the present invention is to provide a vehicle instrumentation system using a controller area network bus to solve the above problems.

Based on the above object, the present invention provides a vehicle instrumentation system using a controller area network bus, comprising a controller area network bus, used to transmit a controller area network bus signal; a first controller area network module, coupled on the Controller Area Network bus. The first controller area network module is used for receiving the controller area network bus signal from the controller area network bus and converting the controller area network bus signal into an information signal. The vehicle instrumentation system further includes an instrument panel; and a processor coupled to the first controller area network module and the instrument panel, the processor is used to receive the information signal and control the instrument panel Information corresponding to the information signal is displayed.

The vehicle instrumentation system further includes a vehicle communication protocol network; and a second controller area network module, coupled to the vehicle communication protocol network and the controller area network bus, the second controller area network module It is used to convert the signal from the vehicle communication protocol network into the controller area network bus signal, and transmit the controller area network bus signal to the controller area network bus.

The vehicle communication protocol network includes a multimedia guidance system transmission network.

The vehicle communication protocol network includes a wire-based control network.

The vehicle communication protocol network includes a local area interconnection network.

The vehicle instrumentation system further includes a vehicle wireless system module; and a third controller area network module, coupled to the vehicle wireless system module and the controller area network bus, the third controller area network module It is used to convert the signal sent by the vehicle wireless system module into the controller area network bus signal, and transmit the controller area network bus signal to the controller area network bus.

The vehicle wireless system module includes a global positioning system unit.

The vehicle wireless system module includes a Zigbee (Zigbee low-power short-distance wireless networking communication technology) wireless network unit.

The vehicle instrumentation system further includes a vehicle fault diagnosis module; and a fourth controller area network module, coupled to the vehicle fault diagnosis module and the controller area network bus, the fourth controller area network module It is used to convert the signal sent by the vehicle fault diagnosis module into the controller area network bus signal, and transmit the controller area network bus signal to the controller area network bus.

The vehicle instrument system further includes a signal slot coupled to a sensing component, the signal slot is used to receive a sensing signal of the sensing component and transmit the sensing signal of the sensing component signal to the processor.

The vehicle instrument system further includes a memory module coupled to the processor, and the memory module is used for storing driving information data.

The vehicle instrumentation system further includes a communication interface module connected to the processor and an external data processing unit, the communication interface module is used to receive data from the external data processing unit to the processor .

The vehicle instrumentation system further includes an auxiliary power supply connected to the processor, and the auxiliary power supply is used to provide power for the processor when a main power supply is cut off.

The first controller area network module is electrically connected to the controller area network bus in a wired transmission manner.

The first controller area network module is electrically connected to the controller area network bus in a wireless transmission manner.

The instrument panel includes an information display for displaying graphic symbols or numerical symbols to represent information corresponding to the information signal.

The instrument panel includes a stepper motor pointer mechanism.

The stepping motor pointer mechanism utilizes a pulse width modulation signal to drive the stepping motor.

The processor is used to control an input/output port to simulate the PWM signal to drive the stepping motor.

The instrument panel includes an electric induction pointer mechanism.

The instrument panel includes an electromagnetic induction pointer mechanism.

The instrument panel includes a light emitting diode unit, which displays information corresponding to the information signal by changing the color intensity.

The first controller area network module is a combination of a general medium and high speed controller area network transceiver and a controller area network controller.

The first controller area network module is a combination of a fault-tolerant low-speed controller area network transceiver and a controller area network controller.

According to the above technical solution, the vehicle instrument system of the present invention has at least the following advantages and beneficial effects: the vehicle instrument system of the present invention uses the controller local area network bus to transmit signals, which can reduce the wiring harness of each electronic module in the vehicle, and can It is flexibly compatible with different electronic control devices, and effectively improves the efficiency of signal transmission and information processing.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy It is understood that a number of embodiments are specifically cited below, and the detailed description is as follows with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a vehicle instrumentation system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an instrument panel according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a third block information display according to an embodiment of the present invention.

Wherein, the reference signs are explained as follows:

10 Vehicle instrumentation system 101 Controller area network

Bus

103 First controller local area 105 Instrument panel

  Network Module

107 processor 109 signal slot

111 Sensing component 113 System circuit

115 memory module 117 communication interface module

119 External data processing unit 121 Auxiliary power supply

Yuan

123 information display 1231 first block information display

Display

1232 Second block information display 1233 Third block information display

Display

125 pointer mechanism 127 light emitting diode unit

129 Backlight module 201 System reset key

301 vehicle communication protocol network 303 second controller local area

Network Network Module

305 vehicle wireless system module 307 third controller local area

Blocks Network Modules

309 vehicle fault diagnosis model 311 fourth controller local area

Blocks Network Modules

401 Instrument name information area 403 Driving status information area

4031 Fuel volume warning sign 4033 Temperature sign

405 Vehicle system status message 407 Text explanation information area

interest area

409 Fault warning and diagnosis 411 Multiple operation keys

Information area

Detailed ways

Certain terms are used throughout the description and claims to refer to particular components. It should be understood by those skilled in the art that manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a basis for distinction. "Include" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". Furthermore, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device can be directly connected to the second device, or indirectly connected to the second device through other devices or connection means. .

Please refer to FIG. 1 , which is a schematic diagram of a vehicle instrumentation system 10 according to an embodiment of the present invention. Vehicle instrument system 10 includes a controller area network bus 101 (ControllerArea Network Bus), used to transmit at least one controller area network bus signal; and a first controller area network (CAN) module 103, coupled to the controller area network network bus 101. The first controller area network module 103 is used for receiving the controller area network bus signal from the controller area network bus 101 and converting the controller area network bus signal into a corresponding information signal. Wherein, the first controller area network module 103 can be electrically connected to the controller area network bus 101 through wired or wireless transmission. The vehicle instrument system 10 further includes an instrument panel 105 and a processor 107 coupled to the first controller area network module 103 and the instrument panel 105 . The processor 107 is used to receive the information signal and control the instrument panel 105 to display information corresponding to the information signal. The vehicle instrumentation system 10 further includes at least one signal socket 109 and at least one sensing component 111 respectively coupled to a system circuit 113 . The sensing component 111 can be an electronic sensing component for sensing temperature, pressure, or a door switch. The signal slot 109 is used to receive a sensing signal generated by the sensing component 111 through the system line 113 and transmit the sensing signal of the sensing component 111 to the processor 107. For example, the sensing component 111 can sense a car door Whether it is closed or not, and output a corresponding sensing signal to the signal slot 109 through the system line 113 , and then transmit the sensing signal to the processor 107 through the signal slot 109 . The vehicle instrumentation system 10 further includes a memory module 115 coupled to the processor 107 . The memory module 115 is used for storing driving information data. The vehicle instrumentation system 10 further includes a communication interface module 117 coupled to the processor 107 and an external data processing unit 119 . The communication interface module 117 is used for receiving the data from the external data processing unit 119 for transmission to the processor 107 . The vehicle instrument system 10 further includes an auxiliary power supply 121 connected to the processor 107. The auxiliary power supply 121 is used to provide power to the processor 107 when a main power supply is cut off. The auxiliary power supply 121 can be coupled to a detection circuit. When it is detected that the vehicle instrumentation system 10 is powered off, the predetermined voltage source is not reached, and the engine is turned off, the auxiliary power supply 121 can be used to provide power to the processor 107 to store mileage, engine Working hours data.

In addition, the instrument panel 105 of the vehicle instrument system 10 may include an information display 123 for displaying graphic symbols or numerical symbols to represent information corresponding to the information signal. The instrument panel 105 of the vehicle instrumentation system 10 can further include a stepping motor pointer mechanism 125, which can use a pulse width modulation (Pulse Width Modulation) signal to drive the stepping motor, and can also use the processor 107 to control an input /Output port analog pulse width modulation signal to drive stepper motor. The instrument panel 105 of the vehicle instrument system 10 may further include an electric induction pointer mechanism and an electromagnetic induction pointer mechanism. The instrument panel 105 of the vehicle instrument system 10 may further include at least one LED unit 127 , which displays information corresponding to the information signal by changing the color intensity. The instrument panel 105 of the vehicle instrument system 10 may further include a backlight module 129 for providing the light source required by the information display 123 and the stepping motor pointer mechanism 125 . The way of displaying vehicle information on the instrument panel 105 is not limited to the above-mentioned way, and depends on actual design requirements.

The vehicle instrumentation system 10 may further include a vehicle communication protocol network 301 and a second controller area network module 303 coupled to the vehicle communication protocol network 301 and the controller area network bus 101 . The second controller area network module 303 is used to convert the signal from the vehicle communication protocol network 301 into a controller area network bus signal, and transmit the controller area network bus signal to the controller area network bus 101 . Wherein, the vehicle communication protocol network 301 may include a multimedia oriented system transmission (Media Oriented System Transport, MOST) network, a line transmission control (X-by-Wire) network, and a local area interconnection network (Local Interconnect Network, LIN) wait.

The vehicle instrumentation system 10 may further include a vehicle wireless system module 305 and a third controller area network module 307 coupled to the vehicle wireless system module 305 and the controller area network bus 101 . The third controller area network module 307 is used to convert the signal transmitted from the vehicle wireless system module 305 into a controller area network bus signal, and transmit the controller area network bus signal to the controller area network bus 101 . Wherein, the vehicle wireless system module 305 includes a global positioning system (Global Position System, GPS) unit, and a Zigbee wireless network unit and the like.

The vehicle instrumentation system 10 may further include a vehicle fault diagnosis module 309 and a fourth controller area network module 311 coupled to the vehicle fault diagnosis module 309 and the controller area network bus 101 . The fourth controller area network module 311 is used to convert the signal from the vehicle fault diagnosis module 309 into a controller area network bus signal, and transmit the controller area network bus signal to the controller area network bus 101 .

Based on the above, since the vehicle communication protocol network 301, the vehicle wireless system module 305, and the vehicle fault diagnosis module 309 respectively pass through the second controller area network module 303, the third controller area network module 307, and the fourth controller area network The network module 311 communicates with the controller area network bus 101 to transmit signals, and then the first controller area network module 103 coupled to the controller area network bus 101 can receive the corresponding vehicle communication protocol network 301, the vehicle wireless system module 305, and the vehicle The controller area network bus signal of the data generated by the fault diagnosis module 309, and convert the controller area network bus signal into a corresponding information signal, and control the instrument panel 105 to display the information of the corresponding information signal, that is to say, through the controller area network bus 101, the instrument panel 105 can display the information generated by the vehicle communication protocol network 301, the vehicle wireless system module 305, and the vehicle fault diagnosis module 309, thereby expanding the compatibility of the instrument panel 105, and the present invention is connected to the controller The functional modules of the local area network bus 101 are not limited to the components described above, as long as the functional modules that can transmit signals through the controller local area network bus 101 belong to the scope of protection of the present invention.

Please refer to FIG. 2 , which is a schematic diagram of an instrument panel 105 according to an embodiment of the present invention. The information display 123 includes a first block information display 1231, a second block information display 1232, and a third block information display 1233, which can be used to present driving information such as engine speed, driving speed, etc., as well as time and total engine working hours. Vehicle status information such as vehicle number, mileage, fault warning signal, air-fuel ratio, pressure, or vehicle maintenance service information, fault diagnosis code, GPS location and other information; the stepping motor pointer mechanism 125 can be used to display engine speed and driving speed, Therefore, the panels of the engine tachometer and the speedometer have corresponding scales respectively; the light-emitting diode unit 127 can be a warning light signal, which is used to present direction lights, near/far lights, minimum fuel warning, parking lights, and emergency warnings. Light, oil lamp, battery indicator and other driving information status. The instrument panel 105 further includes a system reset key 201 coupled to the processor 107 for resetting the vehicle instrument system 10 .

The first block information display 1231 and the second block information display 1231 can be combined with the engine speedometer and the driving speedometer respectively, so they can be used to display the engine speed, driving speed, time, total engine working hours, mileage distance, etc. information, or vehicle maintenance and service information. Please refer to FIG. 3 , which is a schematic diagram of the third block information display 1233 according to an embodiment of the present invention. The third block information display 1233 is a comprehensive information display, which can be used to display an instrument name information area 401, a driving status information area 403, a vehicle system status information area 405, a text explanation information area 407, and a failure warning and information area. Diagnostic information area 409 . The name of the instrument displayed in the instrument name information area 401 can be preset by the system or set by the user; the driving status information area 403 can include a graphic fuel quantity warning sign 4031 and a graphic temperature sign 4033, which are used to display the vehicle temperature respectively. The temperature status of the remaining fuel and engine coolant; the vehicle system status information area 405 can regionally display the fault location of the vehicle, for example: abnormal tire pressure, engine overheating, door open, etc.; the text explanation information area 407 can use text to briefly describe Relevant information, such as the current mode of the multimedia audio-visual player; the fault warning and diagnostic information area 409 can display fault warning signs and diagnostic fault codes. In addition, the third block information display 1233 further includes a plurality of operation keys 411 , which can be used to control the parameter setting of the information display 123 .

To sum up, the vehicle instrumentation system of the present invention has the bus function of the controller area network. In addition to retrieving relevant information and maintenance service information through the bus network of the controller area network, it can also import information from general information through the bus network of the controller area network. The sensing signal from the sensing component is converted into a controller area network bus signal for use by other electronic control devices connected to the controller area network bus signal. In addition, the external setting instrument can be connected to the vehicle instrument system of the present invention through the communication interface module, so the user can set the parameters of the vehicle instrument system according to different needs, so the vehicle instrument system of the present invention has high Advantages of compatibility.

According to the above technical solution, the vehicle instrumentation system of the present invention has at least the following advantages and beneficial effects: The vehicle instrumentation system of the present invention uses the controller area network bus to transmit signals, which can reduce the wiring harness of each electronic module in the vehicle. Each module on the controller area network bus can effectively transmit signals through an arbitration mechanism to solve the problem of data exchange among many electronic modules. In addition, the vehicle instrument system of the present invention can perform parameter setting through the communication interface module or the controller area network bus network, and can receive general sensing signals and convert them into controller area network bus signals to provide other electronic control systems Therefore, it can be flexibly compatible with different electronic control devices, thereby effectively improving the efficiency of signal transmission and information processing.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (24)

1. an auto meter system that uses controller local area network's bus is characterized in that, described auto meter system comprises:

One controller local area network's bus is used for transmitting controller local area network's bus signals;

One first controller local area network's module, be coupled in described controller local area network bus, described first controller local area network's module is used for receiving the described controller local area network bus signals that described controller local area network bus transmitted and changes described controller local area network bus signals is an information signal;

One instrument face plate; And

One treater is coupled in described first controller local area network's module and described instrument face plate, and described treater is used for receiving described information signal and controls the information that described instrument face plate shows corresponding described information signal.

2. auto meter as claimed in claim 1 system is characterized in that, described auto meter system comprises in addition:

One vehicle communication protocol network; And

One second controller local area network's module, be coupled in described vehicle communication protocol network and described controller local area network bus, it is described controller local area network bus signals that described second controller local area network's module is used for changing the signal that described vehicle communication protocol network transmitted, and transmits described controller local area network bus signals to described controller local area network bus.

3. auto meter as claimed in claim 2 system is characterized in that described vehicle communication protocol network comprises a multimedia guidance system transmission network.

4. auto meter as claimed in claim 2 system is characterized in that described vehicle communication protocol network comprises a line transmission control system network.

5. auto meter as claimed in claim 2 system is characterized in that described vehicle communication protocol network comprises a local interconnect network.

6. auto meter as claimed in claim 1 system is characterized in that, described auto meter system comprises in addition:

One automobile wireless system module; And

One the 3rd controller local area network's module, be coupled in described automobile wireless system module and described controller local area network bus, it is described controller local area network bus signals that described the 3rd controller local area network's module is used for changing the signal that described automobile wireless system module transmitted, and transmits described controller local area network bus signals to described controller local area network bus.

7. auto meter as claimed in claim 6 system is characterized in that described automobile wireless system module comprises a global positioning system unit.

8. auto meter as claimed in claim 6 system is characterized in that described automobile wireless system module comprises a Zigbee wireless network element.

9. auto meter as claimed in claim 1 system is characterized in that, described auto meter system comprises in addition:

One car fault diagnosis module; And

One the 4th controller local area network's module, be coupled in described car fault diagnosis module and described controller local area network bus, it is described controller local area network bus signals that described the 4th controller local area network's module is used for changing the signal that described car fault diagnosis module transmitted, and transmits described controller local area network bus signals to described controller local area network bus.

10. auto meter as claimed in claim 1 system is characterized in that, described auto meter system comprises in addition:

One signal slot is coupled in a sensing component, and the described sensing signal that described signal slot is used for receiving a sensing signal of described sensing component and transmits described sensing component is to described treater.

11. auto meter as claimed in claim 1 system is characterized in that, described auto meter system comprises in addition:

One memory module is coupled in described treater, and described memory module is used for storing the driving information data.

12. auto meter as claimed in claim 1 system is characterized in that, described auto meter system comprises in addition:

One communication interface modules is connected in a described treater and an external data processing unit, and described communication interface modules is used for receiving data that described external data processing unit transmits to described treater.

13. auto meter as claimed in claim 1 system is characterized in that, described auto meter system comprises in addition:

One accessory feed is connected in described treater, and described accessory feed is used for providing described processor power when a primary power source de-energizes.

14. auto meter as claimed in claim 1 system is characterized in that described first controller local area network's module is electrically connected to described controller local area network bus with wire transmission mode.

15. auto meter as claimed in claim 1 system is characterized in that described first controller local area network's module is electrically connected to described controller local area network bus with wireless transmission method.

16. auto meter as claimed in claim 1 system is characterized in that described instrument face plate comprises an information display, is used for display graphics symbol or symbol of numeral, to represent the information of corresponding described information signal.

17. auto meter as claimed in claim 1 system is characterized in that described instrument face plate comprises a stepper motor formula point gear.

18. auto meter as claimed in claim 17 system is characterized in that described stepper motor formula point gear utilizes a pulse width modulation signal to drive a stepper motor.

19. auto meter as claimed in claim 17 system is characterized in that described treater is used for controlling an I/O port and simulates described pulse width modulation signal, to drive described stepper motor.

20. auto meter as claimed in claim 1 system is characterized in that described instrument face plate comprises an electric induction type point gear.

21. auto meter as claimed in claim 1 system is characterized in that described instrument face plate comprises an induction point gear.

22. auto meter as claimed in claim 1 system is characterized in that described instrument face plate comprises a light emitting diode, changes to show the information of corresponding described information signal by colouring intensity.

23. auto meter as claimed in claim 1 system is characterized in that described first controller local area network's module is the combination of universal high speed controller local area network's transceiver and controller local area network's controller.

24. auto meter as claimed in claim 1 system is characterized in that described first controller local area network's module is the combination of error-tolerance type low speed controller local area network's transceiver and controller local area network's controller.

Images