CN200983203Y

CN200983203Y - A signal conversion module

Info

Publication number: CN200983203Y
Application number: CN 200620125481
Authority: CN
Inventors: 陈泽坚
Original assignee: Atech Automotive Wuhu Co Ltd
Current assignee: Atech Automotive Wuhu Co Ltd
Priority date: 2006-11-26
Filing date: 2006-11-26
Publication date: 2007-11-28
Anticipated expiration: 2016-11-26

Abstract

The utility model discloses a signal transforming module, comprising power processing circuits connected with each circuit, the utility model is characterized in that the signal transforming module is provided with a high-low level signal input-output circuit, an A/D transformation circuit and a frequency signal output circuit which is respectively connected with a CAN signal processing circuit and a LIN signal processing circuit through a micro computer processing circuit used for mutually transforming among CAN signals, LIN signals and high-low level signals, wherein A/D level signals are transformed to CAN signals or LIN signals, CAN signals and LIN signals are transformed to frequency signals, CAN signals and LIN signals are mutually transformed to each other. The utility model realizes data communication between the module without CAN bus interface and the module with CAN bus interface, thereby improving the performance price ratio and security of automobiles and shortening the development cycle of novel type automobiles, and the signal transforming module can also realize the control of wipers, near and far reaching headlamps.

Description

A kind of signal conversion module

Technical field

The utility model relates to signal translating system, particularly a kind of signal conversion module.

Background technology

At present, automobile is divided into low-grade car and luxury car.Low-grade car is along with the variation of the physical construction of automobile, and the various control systems of automobile realize " line is controlled " to electronization and motorized development.Replace original mechanical transmission mechanism with lead, independently finish control function separately by each control module; Automobile electronics in the luxury car are more and more, in order to reduce the quantity and weight that connects lead, Germany Bosch company has released CAN bus (LAN (Local Area Network) control bus), for solving a kind of serial data communication agreement that control numerous in the Hyundai Motor and the exchanges data between the testing tool are developed.Connection is connected to become a CAN bus network with various auto electroincs, and each electronic installation can also provide data, services for other control device except independently finishing control function separately.Because each electronic module on the automobile can not each module all have the CAN bus interface circuit at present, how to realize that each electronic module carries out data by the CAN bus and transmits, be the technical issues that need to address.

The utility model content

Technical problem to be solved in the utility model is, a kind of signal conversion module is provided, and to reach by signal conversion module, realizes that some do not carry out data communication with the module of CAN bus interface with the module of band CAN bus interface.

For solving the problems of the technologies described above, the technical solution of the utility model is, a kind of signal conversion module, comprise the power supply processing circuit that is connected with each circuit, it is characterized in that: be provided with high-low level signal input and output circuit, A/D change-over circuit, frequency signal output circuit in the described signal conversion module and be connected with the LIN signal processing circuit with the CAN signal processing circuit respectively by the micro computer treatment circuit;

Described micro computer treatment circuit is used for conversion mutually between CAN signal, LIN signal and the high-low level signal; The A/D level signal is converted to CAN signal or LIN signal; CAN signal, LIN conversion of signals are frequency signal; Conversion mutually between CAN signal and the LIN signal.

A kind of signal conversion module, described micro computer treatment circuit is connected with wiper motor-drive circuit, dipped headlights control circuit respectively.

A kind of signal conversion module is provided with in the described micro computer treatment circuit and has the A/D translation function and the logic control chip PWM processing capacity, and inside is provided with the control chip of integrated CAN signal and LIN signal.

A kind of signal conversion module, described logic control chip model is ST72F561.

A kind of signal conversion module, described CAN signal processing circuit is made up of CAN bus transceiving chip, resistance R 1, resistance R 2, capacitor C 1, capacitor C 2, CAN bus signals end in the CAN bus transceiving chip corresponding successively with high-speed CAN bus signal, low speed CAN bus signals and be connected with CAN bus interface earth signal by capacitor C 2, resistance R 2 by serial connection between CAN bus signals and the low speed CAN bus signals is connected, and respectively by capacitor C 1 ground connection; The output terminal of transceiving chip is by corresponding successively being connected with the micro computer treatment circuit of resistance R 1.

A kind of signal conversion module, the model of described CAN bus transceiving chip is TJA1040.

A kind of signal conversion module, described frequency signal output circuit is made up of triode T1, T2, stabilivolt D1, resistance R 3, R4, R5, R6, capacitor C 3, C4, the input end of frequency signal output circuit is connected with output terminal by resistance R 3, triode T1, T2, resistance R 6, the collector of triode T2 connects power supply and passes through stabilivolt D1 ground connection by resistance R 4 respectively, emitter connect respectively triode T1 base stage pass through resistance R 4 ground connection, base stage connects the collector of triode T1, and by capacitor C 3 ground connection.

A kind of signal conversion module is characterized in that: be provided with LIN bus transceiving chip in the described LIN signal processing circuit (7), model is TJA1020.

A kind of signal conversion module, owing to adopt said structure, a kind of signal conversion module, comprise the power supply processing circuit that is connected with each circuit, be provided with high-low level signal input and output circuit, A/D change-over circuit, frequency signal output circuit in the described signal conversion module and be connected with the LIN signal processing circuit with the CAN signal processing circuit respectively by the micro computer treatment circuit.Realize that some do not carry out data communication with the module of CAN bus interface and the module of band CAN bus interface, thereby improved the cost performance and the security of automobile, shortened the construction cycle of new model automobile.This signal conversion module can also realize the control to wiper, near, high beam.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail;

Fig. 1 is a kind of signal conversion module structured flowchart of the utility model;

Fig. 2 is a CAN signal processing circuit structure synoptic diagram shown in Figure 1;

Fig. 3 is a frequency signal output circuit structure synoptic diagram shown in Figure 1;

In Fig. 1～Fig. 3,1, power supply processing circuit; 2, high-low level signal input and output circuit; 3, A/D change-over circuit; 4, frequency signal output circuit; 5, micro computer treatment circuit; 6, CAN signal processing circuit; 7, LIN signal processing circuit; 8, wiper motor-drive circuit; 9, near, high beam control circuit; 10, CAN bus transceiving chip; 11, logic control chip.

Embodiment

As shown in Figure 1, a kind of signal conversion module, comprise the power supply processing circuit 1 that is connected with each circuit, be provided with high-low level signal input and output circuit 2, A/D change-over circuit 3, frequency signal output circuit 4 in the described signal conversion module and be connected with LIN signal processing circuit 7 with CAN signal processing circuit 6 respectively by micro computer treatment circuit 5; Described micro computer treatment circuit 5 is connected with wiper motor-drive circuit 8, near, high beam control circuit 9 respectively.Described micro computer treatment circuit 5 is used for conversion mutually between CAN signal, LIN signal and the high-low level signal; The A/D level signal is converted to CAN signal or LIN signal; CAN signal, LIN conversion of signals are frequency signal; Conversion mutually between CAN signal and the LIN signal.Be provided with in the micro computer treatment circuit 5 and have the logic control chip A/D translation function and PWM (pulse-modulated signal) processing capacity, inside is provided with the control chip of integrated CAN signal and LIN signal.Logic control chip model is ST72F561.

Referring to Fig. 2, Fig. 2 is a CAN signal processing circuit structure synoptic diagram shown in Figure 1, CAN signal processing circuit 6 is that CAN bus transceiving chip 10, resistance R 1, R2 capacitor C 1, the C2 of TJA1040 forms by model, CAN bus signals end in the CAN bus transceiving chip 10 corresponding successively with CANH bus signals, CANL bus signals and be connected with CAN bus interface earth signal by capacitor C 2, CAN bus signals and CANL, resistance R 2 by serial connection between the CANH bus signals is connected, and respectively by capacitor C 1 ground connection; The output terminal of transceiving chip 10 is by corresponding successively being connected with micro computer treatment circuit 5 of resistance R 1.

For example the CAN conversion of signals is become frequency signal, at first the CAN signal processing circuit is communicated by letter with the automatic gear-box system CAN, CANH on the CAN signal processing circuit 6, CANL, CANGND links to each other with corresponding pin on the automatic gear-box, the CAN signal is two-way bus signals, pin 7 by a CAN bus transceiving

chip

10,6,5, the pin 4 of bus transceiving

chip

10,1,8, the CAN conversion of signals is become to send the logic control chip of linking in the micro computer treatment circuit 5, the logic control chip software is handled, and converts frequency signal to, from output pin of other logic control chip to frequency signal output circuit 4.

Referring to Fig. 3, Fig. 3 is a frequency signal output circuit structure synoptic diagram shown in Figure 1; Described frequency signal output circuit 4 is made up of triode T1, T2, stabilivolt D1, resistance R 3, R4, R5, R6, capacitor C 3, the input end of frequency signal output circuit 4 is connected with output terminal by resistance R 3, triode T1, T2, resistance R 6, the collector of triode T2 connects power supply and passes through stabilivolt D1 ground connection by resistance R 4 respectively, emitter connect respectively triode T1 base stage pass through resistance R 5 ground connection, base stage connects the collector of triode T1, and by capacitor C 3 ground connection.Frequency signal output circuit 4 is with the frequency signal amplification, the shaping that receive.

The high-low level conversion of signals becomes the CAN signal.What switch was given us sometimes is a switching signal, voltage or be exactly 0V, or be exactly 12V.Switching signal on the car then is such as the cruise switch on the car, will obtain different voltage by electric resistance partial pressure for certain magnitude of voltage in the middle of the 0V-12V.Each button is pressed, and inputs to signal conversion module with regard to having different voltage.After signal conversion module is received these voltages,, convert the voltage of logic control chip 11 in can range of receiving to, give logic control chip 11 again and handle by high-low level signal input and output circuit 2.Logic control chip 11 is by the CAN interface, and the information that different buttons is pressed is encoded into CAN message, and by CAN bus transceiving chip 10, the vehicle body module of issuing other is such as the EMS engine management system, thus the control speed of a motor vehicle.

Be provided with LIN bus transceiving chip in the LIN signal processing circuit 7, model is TJA1020, and its principle of work and CAN signal processing circuit are roughly the same.

Signal conversion module itself also has the control to wiper drive motor driving circuit 8, and wiper work has low gear and high gear, automatically gear.At each different gears, the working method of windscreen wiper is all different.In low gear and high gear employing is that high-low level is controlled, and automatic wiper device and rain sensor associated working realize, the LIN line of the rain sensor on the car links to each other with LIN bus on the signal conversion module, voltage on the LIN bus is generally at 8-13V, and be two-way transmission signal, by a LIN bus transceiving chip, convert the 8-13V that uses in the LIN agreement to 5V voltage that logic control chip 11 can receive, and become and send and receive two-way, giving logic control chip 11 handles, and sensor is encoded into LIN message to the information of rainfall size in real time, software in the logic control chip 11 with the LIN source codec after, through amplification driving circuit, control the corresponding actuating of relay in real time, real-time automatically allows wiper move according to the rainfall size.

The CAN conversion of signals becomes the high-low level signal.The TCU automatic gear-box is gear information (park on the car, reverse gear, neutral, the driving shelves) converting the CAN bus message to sends to signal conversion module, CAN bus transceiving chip 10 in the signal conversion module in the CAN signal processing circuit 6 converts the CAN bus message to level that logic control chip 11 can receive, logic control chip 11 is through software processes, if at this gear, then logic control chip 11 corresponding output pins are just exported a low level, and high-low level signal input and output circuit 2 is exported to other modules such as instrument.If not at this gear, then logic control chip 11 respective pins are just exported a high level.This signal conversion module also is connected with near, high beam control circuit 9 in addition, has automatic bright lamp function.

In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present utility model and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection domain of the present utility model.

Claims

1, a kind of signal conversion module, comprise the power supply processing circuit (1) that is connected with each circuit, it is characterized in that: be provided with high-low level signal input and output circuit (2), A/D change-over circuit (3), frequency signal output circuit (4) in the described signal conversion module and be connected with LIN signal processing circuit (7) with CAN signal processing circuit (6) respectively by micro computer treatment circuit (5);

Described micro computer treatment circuit (5) is used for conversion mutually between CAN signal, LIN signal and the high-low level signal; The A/D level signal is converted to CAN signal or LIN signal; CAN signal, LIN conversion of signals are frequency signal; Conversion mutually between CAN signal and the LIN signal.

2, a kind of signal conversion module according to claim 1 is characterized in that: described micro computer treatment circuit (5) is connected with wiper motor-drive circuit (8), near, high beam control circuit (9) respectively.

3, a kind of signal conversion module according to claim 1 and 2, it is characterized in that: be provided with in the described micro computer treatment circuit (5) and have the A/D translation function and the logic control chip PWM processing capacity (11), inside is provided with the control chip of integrated CAN signal and LIN signal.

4, a kind of signal conversion module according to claim 3 is characterized in that: described logic control chip (11) model is ST72F561.

5, a kind of signal conversion module according to claim 1, it is characterized in that: described CAN signal processing circuit (6) is made up of CAN bus transceiving chip (10), resistance (R1, R2) electric capacity (C1, C2), CAN bus signals end in the CAN bus transceiving chip (10) corresponding successively with high-speed CAN bus signal, low speed CAN bus signals and be connected with CAN bus interface earth signal by capacitor C 2, resistance R 2 by serial connection between CAN bus signals and the low speed CAN bus signals is connected, and respectively by capacitor C 1 ground connection; The output terminal of transceiving chip (10) is by corresponding successively being connected with micro computer treatment circuit (5) of resistance R 1.

6, a kind of signal conversion module according to claim 5 is characterized in that: the model of described CAN bus transceiving chip (10) is TJA1040.

7, a kind of signal conversion module according to claim 1, it is characterized in that: described frequency signal output circuit (4) is by triode T1, T2, stabilivolt D1, resistance R 3, R4, R5, R6, capacitor C 3 is formed, the input end of frequency signal output circuit (4) is by resistance R 3, triode T1, T2, resistance R 6 is connected with output terminal, the collector of triode T2 connects power supply and passes through stabilivolt D1 ground connection by resistance R 4 respectively, emitter connect respectively triode T1 base stage pass through resistance R 5 ground connection, base stage connects the collector of triode T1, and by capacitor C 3 ground connection.

8, a kind of signal conversion module according to claim 1 is characterized in that: be provided with LIN bus transceiving chip in the described LIN signal processing circuit (7), model is TJA1020.