CN203299644U

CN203299644U - CAN/LIN bus test circuit and CAN/LIN bus test apparatus

Info

Publication number: CN203299644U
Application number: CN2013201556133U
Authority: CN
Inventors: 史松; 马修川; 逄泽芳; 翟跃
Original assignee: Beijing Jingwei Hirain Tech Co Ltd
Current assignee: Beijing Jingwei Hirain Tech Co Ltd
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-11-20
Anticipated expiration: 2023-03-29

Abstract

The utility model discloses a CAN/LIN bus test circuit and a CAN/LIN bus test apparatus. According to the CAN/LIN bus test circuit, control signals from an I/O port and test input signals of a tested electronic control unit are respectively received through a terminal matching module, a threshold testing module, an internal resistance testing module, a wake-up function module, a bus interferometer interface module, a robustness testing module and a short circuit and open circuit testing module, then a test of corresponding functions is performed on the tested electronic control unit, an automatic test on the CAN/LIN bus of the tested electronic control unit is performed, and test output signals are output. According to the CAN/LIN bus test circuit and a CAN/LIN bus test apparatus, control signals of the I/O port are respectively received through various assembled circuits, the automatic test on the CAN/LIN bus of the tested electronic control unit is realized without manual connection of various components by testers, and thus a problem of waste of time and human resources due to manual connection of circuits is solved.

Description

A kind of CAN/LIN bus test circuit and device

Technical field

The utility model relates to the detection technique field of In-vehicle networking ECU (Electrical Control Unit), relates in particular to a kind of CAN/LIN bus test circuit and device.

Background technology

All comprise ECU (Electrical Control Unit) in the In-vehicle networking of present domestic main flow, car load factory and its supplier can test the CAN/LIN bus of ECU (Electrical Control Unit), and the particular content of test comprises: to power lead, ground wire,

CAN_H, CAN_L, LIN equisignal line are carried out short circuit or open-circuit operation; Adopt different test circuits power lead, ground wire, CAN_H, CAN_L, LIN equisignal line to be realized the bus tests such as terminal coupling, threshold testing, internal resistance test, arousal function test, bus interferometer interface testing, robustness test.

In test process, the testing staff need to be mated various test circuits to realize above-mentioned Detection of content, to comprise resistance, electric capacity, voltage source, current source, signal generator and the multimeter etc. of various resistances in the circuit that mates, the testing staff adopts manual mode to carry out connection can expend a large amount of time and manpower.

The utility model content

In view of this, the utility model provides a kind of CAN/LIN bus test circuit and device, to solve in prior art time that manual connecting circuit brought and the waste problem of manpower.

To achieve these goals, the existing scheme that proposes is as follows:

A kind of CAN/LIN bus test circuit, be connected with power supply, comprising: terminal matching module, threshold testing module, internal resistance test module, arousal function module, bus interferometer interface module, robustness test module and short interruption test module; Wherein:

Receive the terminal match control signal of I/O port transmission and the Test input signal of tested ECU (Electrical Control Unit), the terminal matching feature of realization to described tested ECU (Electrical Control Unit), and the terminal matching module that test output signal is exported to the bus test instrument is connected with described I/O port, described tested ECU (Electrical Control Unit) and described bus test instrument;

Receive the threshold testing control signal of described I/O port transmission and the Test input signal of described tested ECU (Electrical Control Unit), realization is to described tested ECU (Electrical Control Unit) threshold testing, and the threshold testing module that test output signal is exported to the bus test instrument is connected with described I/O port, described tested ECU (Electrical Control Unit) and described bus test instrument;

Receive the internal resistance test control signal of described I/O port transmission and the Test input signal of described tested ECU (Electrical Control Unit), realization is to described tested ECU (Electrical Control Unit) internal resistance test, and the internal resistance test module that test output signal is exported to the bus test instrument is connected with described I/O port, described tested ECU (Electrical Control Unit) and described bus test instrument;

Receive the arousal function control signal of described I/O port transmission and the Test input signal of described tested ECU (Electrical Control Unit), realization is to described tested ECU (Electrical Control Unit) arousal function test, and the arousal function module that test output signal is exported to the bus test instrument is connected with described I/O port, described tested ECU (Electrical Control Unit) and described bus test instrument;

Receive the bus interferometer interface control signal of described I/O port transmission and the Test input signal of described tested ECU (Electrical Control Unit), realization is to described tested ECU (Electrical Control Unit) bus interferometer interface testing, and the bus interferometer interface module that test output signal is exported to the bus test instrument is connected with described I/O port, described tested ECU (Electrical Control Unit) and described bus test instrument;

Receive the robustness test control signal of described I/O port transmission and the Test input signal of described tested ECU (Electrical Control Unit), realization is to described tested ECU (Electrical Control Unit) robustness test, and the robustness test module that test output signal is exported to the bus test instrument is connected with described I/O port, described tested ECU (Electrical Control Unit) and described bus test instrument;

Receive the short interruption test control signal of described I/O port transmission and the Test input signal of described tested ECU (Electrical Control Unit), realization is to described tested ECU (Electrical Control Unit) short interruption test, and the short interruption test module that test output signal is exported to the bus test instrument is connected with described I/O port, described tested ECU (Electrical Control Unit) and described bus test instrument;

Described terminal matching module, threshold testing module, internal resistance test module, arousal function module, bus interferometer interface module, robustness test module and short interruption test module are connected with described power supply respectively.

Preferably, described terminal matching module comprises: the first relay, the second relay, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity and the second electric capacity; Wherein:

16 mouthfuls of the first relay are connected with the P0.0 mouth of described I/O port, 13 mouthfuls of described the first relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the first relay are connected with an end of the first resistance, the other end of described the first resistance is connected with an end of the second resistance, 8 mouthfuls of the other end of described the second resistance and described the first relay are connected, described the first resistance is connected with an end of the first electric capacity with the tie point of the second resistance, the other end ground connection of described the first electric capacity, 4 mouthfuls of described the first relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit), 1 mouthful of described the first relay is connected with power supply,

16 mouthfuls of the second relay are connected with the P0.1 mouth of described I/O port, 13 mouthfuls of described the second relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the second relay are connected with an end of the 3rd resistance, the other end of described the 3rd resistance is connected with an end of the 4th resistance, 8 mouthfuls of the other end of described the 4th resistance and described the second relay are connected, described the 3rd resistance is connected with an end of the second electric capacity with the tie point of the 4th resistance, the other end ground connection of described the second electric capacity, 4 mouthfuls of described the second relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit), 1 mouthful of described the second relay is connected with described power supply,

The CAN_H line of described tested ECU (Electrical Control Unit) and CAN_L line are connected with described bus test instrument respectively.

Preferably, described threshold testing module comprises: the 3rd relay, the 4th relay, the 5th relay, the 6th relay, the 7th relay, the 5th resistance and the 6th resistance; Wherein:

8 mouthfuls of the 3rd relay are connected with current source is anodal, 9 mouthfuls of described the 3rd relay are connected with described current source negative pole, 4 mouthfuls of described the 3rd relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit) respectively with 13 mouthfuls, 6 mouthfuls of described the 3rd relay 11 mouthfuls of short circuits with described the 3rd relay, 1 mouthful of described the 3rd relay is connected with described power supply, and 16 mouthfuls of described the 3rd relay are connected with the P0.2 mouth of described I/O port;

8 mouthfuls of the 4th relay are connected with described current source is anodal, 9 mouthfuls of described the 4th relay are connected with described current source negative pole, 4 mouthfuls of described the 4th relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit) respectively with 13 mouthfuls, 6 mouthfuls of described the 4th relay 11 mouthfuls of short circuits with described the 4th relay, 1 mouthful of described the 4th relay is connected with described power supply, and 16 mouthfuls of described the 4th relay are connected with the P0.3 mouth of described I/O port;

2 mouthfuls of the 5th relay are connected with described power supply, 5 mouthfuls of described the 5th relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 5th relay are connected with an end of the 5th resistance, the other end of described the 5th resistance is connected with the CAN_H line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the 5th relay are connected with the P0.4 mouth of described I/O port, and 10 mouthfuls of described the 5th relay are connected with voltage source is anodal;

2 mouthfuls of the 6th relay are connected with described power supply, 5 mouthfuls of described the 6th relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 6th relay are connected with an end of the 6th resistance, the other end of described the 6th resistance is connected with the CAN_L line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the 6th relay are connected with the P0.5 mouth of described I/O port, and 10 mouthfuls of described the 6th relay are connected with described voltage source is anodal;

2 mouthfuls of the 7th relay are connected with described power supply, 5 mouthfuls of described the 7th relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 7th relay are connected with described voltage source negative pole, 9 mouthfuls of described the 7th relay are connected with the P0.6 mouth of described I/O port, and 10 mouthfuls of described the 7th relay are connected with the GND line of described tested ECU (Electrical Control Unit);

Preferably, described internal resistance test module comprises: the 8th relay, the 9th relay, the tenth relay, the 11 relay, the 12 relay and the 7th resistance; Wherein:

1 mouthful of the 8th relay is connected with the CAN_H line of described tested ECU (Electrical Control Unit), 2 mouthfuls of described the 8th relay are connected with described power supply, 5 mouthfuls of described the 8th relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 8th relay are connected with voltage table is anodal, 9 mouthfuls of described the 8th relay are connected with the P0.7 mouth of described I/O port, and 10 mouthfuls of described the 8th relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit);

2 mouthfuls of the 9th relay are connected with described power supply, 5 mouthfuls of described the 9th relay are connected with an end of the 7th resistance, 5 mouthfuls of described the 9th relay are connected with described voltage table is anodal with the tie point of the 7th resistance, 6 mouthfuls of the other end of described the 7th resistance and described the 9th relay are connected, 9 mouthfuls of described the 9th relay are connected with the P1.1 mouth of described I/O port, and 10 mouthfuls of described the 9th relay are connected with described voltage source is anodal;

2 mouthfuls of the tenth relay are connected with described power supply, 5 mouthfuls of described the tenth relay are connected with 6 mouthfuls, 5 mouthfuls and the tie point ground connection of 6 mouthfuls of described the tenth relay, 9 mouthfuls of described the tenth relay are connected with the P1.3 mouth of described I/O port, and 10 mouthfuls of described the tenth relay are connected with the GND line of described tested ECU (Electrical Control Unit);

2 mouthfuls of the 11 relay are connected with described power supply, 5 mouthfuls of described the 11 relay are connected with 6 mouthfuls, 5 mouthfuls and the tie point ground connection of 6 mouthfuls of described the 11 relay, 9 mouthfuls of described the 11 relay are connected with the P1.2 mouth of described I/O port, 10 mouthfuls of described the 11 relay are connected with the negative pole of described voltage source, and 10 mouthfuls of described the 11 relay are connected with the negative pole of described voltage table with the tie point of described voltage source negative pole;

2 mouthfuls of the 12 relay are connected with described power supply, 5 mouthfuls of described the 12 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 12 relay are connected with the negative pole of described voltage source, 5 mouthfuls, 6 mouthfuls of described the 12 relay are connected with the negative pole of described voltage table with the tie point of described voltage source negative pole, 9 mouthfuls of described the 12 relay are connected with the P1.4 mouth of described I/O port, and 10 mouthfuls of described the 12 relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit);

Preferably, described arousal function module comprises: the 13 relay and the 14 relay; Wherein:

2 mouthfuls of the 13 relay are connected with described power supply, 5 mouthfuls of described the 13 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 13 relay are connected with the first wake-up signal source, 9 mouthfuls of described the 13 relay are connected with the P1.5 mouth of described I/O port, and 10 mouthfuls of described the 13 relay are waken up pin with first of described tested ECU (Electrical Control Unit) and are connected;

2 mouthfuls of the 14 relay are connected with described power supply, 5 mouthfuls of described the 14 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 14 relay are connected with the second wake-up signal source, 9 mouthfuls of described the 14 relay are connected with the P1.6 mouth of described I/O port, and 10 mouthfuls of described the 14 relay are waken up pin with second of described tested ECU (Electrical Control Unit) and are connected;

Preferably, described bus interferometer interface module comprises: the 15 relay, the 16 relay, the 17 relay and the 18 relay; Wherein:

1 mouthful of the 15 relay is connected with described power supply, 4 mouthfuls of described the 15 relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit), 8 mouthfuls of CAN_L that receive the bus interferometer of described the 15 relay disturb input signal, 9 mouthfuls of CAN_H that receive the bus interferometer of described the 15 relay disturb input signal, 13 mouthfuls of described the 15 relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit), and 16 mouthfuls of described the 15 relay are connected with the P1.7 mouth of described I/O port;

1 mouthful of the 16 relay is connected with described power supply, 4 mouthfuls of output CAN_L interference output signals of described the 16 relay, 8 mouthfuls of output CAN_L output signals of described the 16 relay, 9 mouthfuls of output CAN_H output signals of described the 16 relay, 13 mouthfuls of output CAN_H interference output signals of described the 16 relay, 16 mouthfuls of described the 16 relay are connected with the P1.7 mouth of described I/O port;

1 mouthful of the 17 relay receives described CAN_H output signal, 2 mouthfuls of described the 17 relay are connected with described power supply, 5 mouthfuls of described the 17 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 17 relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the 17 relay are connected with the P2.0 mouth of described I/O port, and 10 mouthfuls of described the 17 relay are connected with described bus test instrument;

1 mouthful of the 18 relay receives described CAN_L output signal, 2 mouthfuls of described the 18 relay are connected with described power supply, 5 mouthfuls of described the 18 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 18 relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the 18 relay are connected with the P2.1 mouth of described I/O port, and 10 mouthfuls of described the 18 relay are connected with described bus test instrument.

Preferably, described robustness test module comprises: the 19 relay, the 20 relay, the 21 relay and the 22 relay; Wherein:

1 mouthful of the 19 relay is connected with described power supply, 4 mouthfuls of described the 19 relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit), 8 mouthfuls of described the 19 relay receive CAN_L robustness input signal, 9 mouthfuls of described the 19 relay receive CAN_H robustness input signal, 13 mouthfuls of described the 19 relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit), and 16 mouthfuls of described the 19 relay are connected with the P2.2 mouth of described I/O port;

1 mouthful of the 20 relay is connected with described power supply, 4 mouthfuls of output CAN_L robustness output signals of described the 20 relay, 8 mouthfuls of output CAN_L output signals of described the 20 relay, 9 mouthfuls of output CAN_H output signals of described the 20 relay, 13 mouthfuls of output CAN_H robustness output signals of described the 20 relay, 16 mouthfuls of described the 20 relay are connected with the P2.2 mouth of described I/O port;

1 mouthful of the 21 relay receives described CAN_H output signal, 2 mouthfuls of described the 21 relay are connected with described power supply, 5 mouthfuls of described the 21 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 21 relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the 21 relay are connected with the P2.3 mouth of described I/O port, and 10 mouthfuls of described the 21 relay are connected with described bus test instrument;

1 mouthful of the 22 relay receives described CAN_L output signal, 2 mouthfuls of described the 22 relay are connected with described power supply, 5 mouthfuls of described the 22 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 22 relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the 22 relay are connected with the P2.4 mouth of described I/O port, and 10 mouthfuls of described the 22 relay are connected with described bus test instrument.

Preferably, described short interruption test module comprises: the 23 relay, the 24 relay, the 25 relay, the 26 relay, the 27 relay, the 28 relay, the 29 relay, the 30 relay, the 31 relay and the 32 relay; Wherein:

2 mouthfuls of the 23 relay are connected with described power supply, 5 mouthfuls of described the 23 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 23 relay are connected with the KL30_OUT port, 9 mouthfuls of described the 23 relay are connected with the P2.5 mouth of described I/O port, and 10 mouthfuls of described the 23 relay are connected with the KL30_IN port;

2 mouthfuls of the 24 relay are connected with described power supply, 5 mouthfuls of described the 24 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 24 relay are connected with the KL15_OUT port, 9 mouthfuls of described the 24 relay are connected with the P2.6 mouth of described I/O port, and 10 mouthfuls of described the 24 relay are connected with the KL15_IN port;

2 mouthfuls of the 25 relay are connected with described power supply, 5 mouthfuls of described the 25 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 25 relay are connected with the GND_OUT port, 9 mouthfuls of described the 25 relay are connected with the P2.7 mouth of described I/O port, and 10 mouthfuls of described the 25 relay are connected with the GND_IN port;

2 mouthfuls of the 26 relay are connected with described power supply, 5 mouthfuls of described the 26 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 26 relay are connected with the CAN_H/LIN_OUT port, described CAN_H/LIN_OUT port is connected with described bus test instrument, 9 mouthfuls of described the 26 relay are connected with the P3.0 mouth of described I/O port, and 10 mouthfuls of described the 26 relay are connected with the CAN_H/LIN_IN port;

2 mouthfuls of the 27 relay are connected with described power supply, 5 mouthfuls of described the 27 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 27 relay are connected with the CAN_L_OUT port, described CAN_L_OUT port is connected with described bus test instrument, 9 mouthfuls of described the 27 relay are connected with the P3.1 mouth of described I/O port, and 10 mouthfuls of described the 27 relay are connected with the CAN_L_IN port;

2 mouthfuls of the 28 relay are connected with described power supply, 5 mouthfuls of described the 28 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 28 relay are connected with described CAN_L_IN port, 9 mouthfuls of described the 28 relay are connected with the P3.2 mouth of described I/O port, and 10 mouthfuls of described the 28 relay are connected with described CAN_H/LIN_IN port;

2 mouthfuls of the 29 relay are connected with described power supply, 5 mouthfuls of described the 29 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 29 relay are connected with described KL30_IN port, 9 mouthfuls of described the 29 relay are connected with the P3.3 mouth of described I/O port, and 10 mouthfuls of described the 29 relay are connected with described CAN_H/LIN_IN port;

2 mouthfuls of the 30 relay are connected with described power supply, 5 mouthfuls of described the 30 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 30 relay are connected with described CAN_L_IN port, 9 mouthfuls of described the 30 relay are connected with the P3.4 mouth of described I/O port, and 10 mouthfuls of described the 30 relay are connected with described KL30_IN port;

2 mouthfuls of the 31 relay are connected with described power supply, 5 mouthfuls of described the 31 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 31 relay are connected with described GND_IN port, 9 mouthfuls of described the 31 relay are connected with the P3.5 mouth of described I/O port, and 10 mouthfuls of described the 31 relay are connected with described CAN_L_IN port;

2 mouthfuls of the 32 relay are connected with described power supply, 5 mouthfuls of described the 32 relay are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of described the 32 relay are connected with described CAN_H/LIN_IN port, 9 mouthfuls of described the 32 relay are connected with the P3.6 mouth of described I/O port, and 10 mouthfuls of described the 32 relay are connected with described GND_IN port.

A kind of CAN/LIN bus test device, comprise above-mentioned arbitrary described CAN/LIN bus test circuit, I/O port and bus test instrument; Wherein:

Receive the control signal of PC and the I/O port that the control signal of described PC exports described CAN/LIN bus test circuit to is connected between described PC and described CAN/LIN bus test circuit;

Receive the test output signal of described CAN/LIN bus test circuit, and the bus test instrument that described test output signal is sent to described PC is connected between described CAN/LIN bus test circuit and described PC.

Preferably, described I/O port is NI6509; Described bus test instrument is CANoe.

can find out from above-mentioned technical scheme, the utility model disclosed CAN/LIN bus test circuit and device, by the terminal matching module, the threshold testing module, the internal resistance test module, the arousal function module, bus interferometer interface module, robustness test module and short interruption test module receive respectively separately the Test input signal from control signal and the tested ECU (Electrical Control Unit) of I/O port, then tested ECU (Electrical Control Unit) is carried out the test of corresponding function, the automatic test of realization to the CAN/LIN bus of tested ECU (Electrical Control Unit), and test output signal is exported, the utility model disclosed CAN/LIN bus test circuit and device, receive the control signal of I/O port separately by the various circuit that assemble, the automatic test of realization to the CAN/LIN bus of tested ECU (Electrical Control Unit), no longer need the testing staff manually to connect various components and parts, solved the time that in the prior art, manual connecting circuit is brought and the waste problem of manpower.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the disclosed CAN/LIN bus test of the utility model embodiment device circuit figure;

Fig. 2 is the disclosed CAN/LIN bus test of another embodiment of the utility model device circuit figure;

Fig. 3 is the disclosed terminal matching module of another embodiment of the utility model circuit diagram;

Fig. 4 is the disclosed threshold testing module circuit diagram of another embodiment of the utility model;

Fig. 5 is the disclosed internal resistance test module of another embodiment of the utility model circuit diagram;

Fig. 6 is the disclosed arousal function module circuit diagram of another embodiment of the utility model;

Fig. 7 is the disclosed bus interferometer of another embodiment of the utility model interface module circuit diagram;

Fig. 8 is the disclosed robustness test module of another embodiment of the utility model circuit diagram;

Fig. 9 is the disclosed short interruption test module of another embodiment of the utility model circuit diagram.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment that obtains, and all belong to the scope of the utility model protection.

The utility model provides a kind of CAN/LIN bus test circuit, to solve in prior art time that manual connecting circuit brought and the waste problem of manpower.As shown in Figure 1, CAN/LIN bus test circuit 103 is connected with power supply.

Concrete, as shown in Figure 2, CAN/LIN bus test circuit 103 comprises: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037; Wherein: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037 are connected with I/O port one 02, tested ECU (Electrical Control Unit) 104, bus test instrument 105 and described power supply respectively.

Concrete principle of work is:

Terminal matching module 1031 receives the terminal match control signal of I/O port one 02 transmission and the Test input signal of tested ECU (Electrical Control Unit) 104, realizes the terminal matching test to tested ECU (Electrical Control Unit) 104, and exports test output signal to bus test instrument 105;

Threshold testing module 1032 receives the threshold testing control signal of I/O port one 02 transmission and the Test input signal of tested ECU (Electrical Control Unit) 104, realizes the threshold testing to tested ECU (Electrical Control Unit) 104, and exports test output signal to bus test instrument 105;

Internal resistance test module 1033 receives the internal resistance test control signal of I/O port one 02 transmission and the Test input signal of tested ECU (Electrical Control Unit) 104, realizes the internal resistance test to tested ECU (Electrical Control Unit) 104, and exports test output signal to bus test instrument 105;

Arousal function module 1034 receives the arousal function control signal of I/O port one 02 transmission and the Test input signal of tested ECU (Electrical Control Unit) 104, realizes the arousal function test to tested ECU (Electrical Control Unit) 104, and exports test output signal to bus test instrument 105;

Bus interferometer interface module 1035 receives the bus interferometer interface control signal of I/O port one 02 transmission and the Test input signal of tested ECU (Electrical Control Unit) 104, the bus interferometer interface testing of realization to tested ECU (Electrical Control Unit) 104, and export test output signal to bus test instrument 105;

Robustness test module 1036 receives the robustness test control signal of I/O port one 02 transmission and the Test input signal of tested ECU (Electrical Control Unit) 104, the robustness test of realization to tested ECU (Electrical Control Unit) 104, and export test output signal to bus test instrument 105;

Short interruption test module 1037 receives the short interruption test control signal of I/O port one 02 transmission and the Test input signal of tested ECU (Electrical Control Unit) 104, the short interruption test of realization to tested ECU (Electrical Control Unit) 104, and export test output signal to bus test instrument 105.

the disclosed CAN/LIN bus test of the present embodiment circuit, by the terminal matching module 1031 that assembles, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037 receive respectively separately the control signal from the I/O port, the automatic test of realization to the CAN/LIN bus of tested ECU (Electrical Control Unit) 104, no longer need the testing staff manually to connect various components and parts, the time that in the prior art, manual connecting circuit is brought and the waste problem of manpower have been solved.

Another embodiment of the utility model also provides another CAN/LIN bus test circuit, as shown in Figure 3, comprising: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037; Wherein:

Terminal matching module 1031 comprises: the first relay U1, the second relay U2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1 and the second capacitor C 2; Wherein:

16 mouthfuls of the first relay U1 are connected with the P0.0 mouth of I/O port one 02, 13 mouthfuls of the first relay U1 are connected with the CAN_H line of tested ECU (Electrical Control Unit) 104, 9 mouthfuls of ends with the first resistance R 1 of the first relay U1 are connected, the other end of the first resistance R 1 is connected with an end of the

second resistance R

2, 8 mouthfuls of the other end of the second resistance R 2 and the first relay U1 are connected, the first resistance R 1 is connected with an end of the first capacitor C 1 with the tie point of the second resistance R 2, the other end ground connection of the

first capacitor C

1, 4 mouthfuls of the first relay U1 are connected with the CAN_L line of tested ECU (Electrical Control Unit) 104, 1 mouthful of the first relay U1 is connected with power supply,

16 mouthfuls of the second relay U2 are connected with the P0.1 mouth of I/O port one 02, 13 mouthfuls of the second relay U2 are connected with the CAN_H line of tested ECU (Electrical Control Unit) 104, 9 mouthfuls of ends with the 3rd resistance R 3 of the second relay U2 are connected, the other end of the 3rd resistance R 3 is connected with an end of the

4th resistance R

4, 8 mouthfuls of the other end of the 4th resistance R 4 and the second relay U2 are connected, the 3rd resistance R 3 is connected with an end of the second capacitor C 2 with the tie point of the 4th resistance R 4, the other end ground connection of the

second capacitor C

2, 4 mouthfuls of the second relay U2 are connected with the CAN_L line of tested ECU (Electrical Control Unit) 104, 1 mouthful of the second relay U2 is connected with power supply,

The CAN_H line of tested ECU (Electrical Control Unit) 104 and CAN_L line are connected with bus test instrument 105 respectively.

Wherein, the model of the first relay U1 and the second relay U2 is OMRON_G5V-2.

In actual applications, the CAN bus of tested ECU (Electrical Control Unit) 104 is connected with other components and parts by connection terminal X1, when other ECU (Electrical Control Unit) detect, can realize that CAN/LIN bus test circuit is connected with the replacing of other ECU (Electrical Control Unit) that need to detect by connection terminal X1, and output signal to bus test instrument 105 by connection terminal X1, the signal between realization and PC 101 is mutual.

Concrete principle of work is:

The P0.0 mouth of I/O port one 02 and the output signal of P0.1 mouth are terminal match control signal; The high-low level of the P0.0 mouth output signal by controlling I/O port one 02, realize the state switching of the first relay U1, to complete the matching feature of 120 Ω terminal resistances; The high-low level of the P0.1 mouth output signal by controlling I/O port one 02, realize the state switching of the second relay U2, to complete the matching feature of 120 Ω terminal resistances.Switch simultaneously the matching feature that the first relay U1 and the second relay U2 can realize 60 Ω terminal resistances.

The connected mode of interior other components and parts of the present embodiment and concrete principle of work are same as the previously described embodiments, repeat no more herein.

Another embodiment of the utility model also provides another CAN/LIN bus test circuit, as shown in Figure 4, comprising: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037; Wherein:

Threshold testing module 1032 comprises: the 3rd relay U3, the 4th relay U4, the 5th relay U5, the 6th relay U6, the 7th relay U7, the 5th resistance R 5 and the 6th resistance R 6; Wherein:

8 mouthfuls of the 3rd relay U3 are connected with current source I is anodal by connection terminal, 9 mouthfuls of the 3rd relay U3 are connected with current source I negative pole by connection terminal, 4 mouthfuls of the 3rd relay U3 are connected with the CAN_H line of tested ECU (Electrical Control Unit) 104 respectively with 13 mouthfuls, 6 mouthfuls and 11 mouthfuls of short circuits of the 3rd relay U3,1 mouthful of the 3rd relay U3 is connected with power supply, and 16 mouthfuls of the 3rd relay U3 are connected with the P0.2 mouth of I/O port one 02;

8 mouthfuls of the 4th relay U4 are connected with current source I is anodal by connection terminal, 9 mouthfuls of the 4th relay U4 are connected with current source I negative pole by connection terminal, 4 mouthfuls of the 4th relay U4 are connected with the CAN_L line of tested ECU (Electrical Control Unit) 104 respectively with 13,6 mouthfuls and 11 mouthfuls of short circuits of the 4th relay U4,1 mouthful of the 4th relay U4 is connected with power supply, and 16 mouthfuls of the 4th relay U4 are connected with the P0.3 mouth of described I/O port one 02;

2 mouthfuls of the 5th relay U5 are connected with power supply, 5 mouthfuls of the 5th relay U5 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 5th relay U5 are connected with an end of the 5th resistance R 5, the other end of the 5th resistance R 5 is connected with the CAN_H line of tested ECU (Electrical Control Unit) 104,9 mouthfuls of the 5th relay U5 are connected with the P0.4 mouth of I/O port one 02, and 10 mouthfuls of the 5th relay U5 are connected with voltage source U is anodal by connection terminal;

2 mouthfuls of the 6th relay U6 are connected with power supply, 5 mouthfuls of the 6th relay U6 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 6th relay U6 are connected with an end of the 6th resistance R 6, the other end of the 6th resistance R 6 is connected with the CAN_L line of tested ECU (Electrical Control Unit) 104,9 mouthfuls of the 6th relay U6 are connected with the P0.5 mouth of I/O port one 02, and 10 mouthfuls of the 6th relay U6 are connected with voltage source U is anodal by connection terminal;

2 mouthfuls of the 7th relay U7 are connected with power supply, 5 mouthfuls of the 7th relay U7 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 7th relay U7 are connected with voltage source U negative pole by connection terminal, 9 mouthfuls of the 7th relay U7 are connected with the P0.6 mouth of I/O port one 02, and 10 mouthfuls of the 7th relay U7 are connected with the GND line of tested ECU (Electrical Control Unit) 104;

Wherein, the model of the 3rd relay U3 and the 4th relay U4 is OMRON_G5V-2; The model of the 5th relay U5, the 6th relay U6 and the 7th relay U7 is OMRON_G5V-1.

In actual applications, the CAN bus of tested ECU (Electrical Control Unit) 104 is connected with other components and parts by connection terminal X2 with the GND line; Voltage source U is connected with other components and parts by connection terminal X3 with current source I.

Concrete principle of work is:

When tested ECU (Electrical Control Unit) 104 is carried out threshold testing, control the 3rd relay U3 and the 4th relay U4 by P0.2 mouth and the P0.3 mouth of I/O port one 02, realize the Circuit Matching that CAN_H line in test circuit, CAN_L line are connected in series with current source I; Under default conditions, the CAN_H line of tested ECU (Electrical Control Unit) 104 keeps conducting by the 3rd relay U3; The CAN_L line of tested ECU (Electrical Control Unit) 104 keeps conducting by the 4th relay U4; P0.4 mouth by I/O port one 02 is controlled the 5th relay U5, seals in the 5th resistance R 5 access CAN_H lines of 1k Ω, by the P0.5 mouth of I/O port one 02, controls the 6th relay U6, seals in the 6th resistance R 6 access CAN_L lines of 1k Ω; Control the 7th relay U7 by the P0.6 mouth of I/O port one 02 and realize tested ECU (Electrical Control Unit) 104 and voltage source U function altogether; By the control of the P0.2 mouth to I/O port one 02, P0.3 mouth, P0.4 mouth, P0.5 mouth and P0.6 mouth threshold testing control signal, complete aforesaid operations, realize the threshold testing to tested ECU (Electrical Control Unit) 104.

Another embodiment of the utility model also provides another CAN/LIN bus test circuit, as shown in Figure 5, comprising: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037; Wherein:

Internal resistance test module 1033 comprises: the 8th relay U8, the 9th relay U9, the tenth relay U10, the 11 relay U11, the 12 relay U12 and the 7th resistance R 7; Wherein:

1 mouthful of the 8th relay U8 is connected with the CAN_H line of tested ECU (Electrical Control Unit) 104,2 mouthfuls of the 8th relay U8 are connected with power supply, 5 mouthfuls of the 8th relay U8 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 8th relay U8 are connected with voltage table V is anodal, 9 mouthfuls of the 8th relay U8 are connected with the P0.7 mouth of I/O port one 02, and 10 mouthfuls of the 8th relay U8 are connected with the CAN_L line of tested ECU (Electrical Control Unit) 104;

2 mouthfuls of the 9th relay U9 are connected with power supply, 5 mouthfuls of ends with the 7th resistance R 7 of the 9th relay U9 are connected, 5 mouthfuls of the 9th relay U9 are connected with voltage table V is anodal with the tie point of the

7th resistance R

7,6 mouthfuls of the other end of the 7th resistance R 7 and the 9th relay U9 are connected, 9 mouthfuls of the 9th relay U9 are connected with the P1.1 mouth of I/O port one 02, and 10 mouthfuls of the 9th relay U9 are connected with voltage source U is anodal;

2 mouthfuls of the tenth relay U10 are connected with power supply, 5 mouthfuls of the tenth relay U10 are connected with 6 mouthfuls, 5 mouthfuls and the tie point ground connection of 6 mouthfuls of the tenth relay U10,9 mouthfuls of the tenth relay U10 are connected with the P1.3 mouth of I/O port one 02, and 10 mouthfuls of the tenth relay U10 are connected with the GND line of tested ECU (Electrical Control Unit) 104;

2 mouthfuls of the 11 relay U11 are connected with power supply, 5 mouthfuls of the 11 relay U11 are connected with 6 mouthfuls, 5 mouthfuls and the tie point ground connection of 6 mouthfuls of the 11 relay U11,9 mouthfuls of the 11 relay U11 are connected with the P1.2 mouth of I/O port one 02,10 mouthfuls of negative poles with voltage source U of the 11 relay U11 are connected, and 10 mouthfuls of the 11 relay U11 are connected with the negative pole of voltage table V with the tie point of voltage source U negative pole;

2 mouthfuls of the 12 relay U12 are connected with power supply, 5 mouthfuls of the 12 relay U12 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 12 relay U12 are connected with the negative pole of voltage source U, 5 mouthfuls, 6 mouthfuls of the 12 relay U12 are connected with the negative pole of voltage table V with the tie point of voltage source U negative pole, 9 mouthfuls of the 12 relay U12 are connected with the P1.4 mouth of I/O port one 02, and 10 mouthfuls of the 12 relay U12 are connected with the CAN_H line of tested ECU (Electrical Control Unit) 104;

Wherein, the model of the 8th relay U8, the 9th relay U9, the tenth relay U10, the 11 relay U11 and the 12 relay U12 is OMRON_G5V-1.

In actual applications, the CAN bus of tested ECU (Electrical Control Unit) 104 is connected with other components and parts by connection terminal X4 with the GND line; Voltage source U is connected with other components and parts by connection terminal X5 with voltage table V.

Concrete principle of work is:

When tested ECU (Electrical Control Unit) 104 was carried out the internal resistance test, the P0.7 mouth of controlling I/O port one 02 output control signals to the 8th relay U8, completes the switching of CAN-H and the CAN-L signal wire of tested ECU (Electrical Control Unit) 104, connected the CAN-H line under default conditions; The P1.1 mouth of I/O port one 02 outputs control signals to the 9th relay U9, completes the connected in series of the CAN-H of tested ECU (Electrical Control Unit) 104 or CAN-L signal wire and the 7th resistance R 7; The P1.2 mouth of I/O port one 02 outputs control signals to the 11 relay U11, and the negative pole of the GND line of tested ECU (Electrical Control Unit) 104 and I/O port one 02 and voltage source U is realized altogether; The P1.3 mouth of I/O port one 02 outputs control signals to the tenth relay U10, the negative pole of the negative pole of voltage source U and voltage table V is connected into circuit, and realizes voltage table V altogether; The P1.4 mouth of I/O port one 02 outputs control signals to the 12 relay U12, being connected of the negative pole of the CAN_H line of realizing tested ECU (Electrical Control Unit) 104 and the negative pole of voltage source U and voltage table V., by the control of I/O port one 02 output signal, can realize the coupling of the CAN_H internal resistance test circuit of tested ECU (Electrical Control Unit) 104, the coupling of CAN_L internal resistance test circuit and the coupling of difference internal resistance test circuit.

Another embodiment of the utility model also provides another CAN/LIN bus test circuit, as shown in Figure 6, comprising: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037; Wherein:

Arousal function module 1034 comprises: the 13 relay U13 and the 14 relay U14; Wherein:

2 mouthfuls of the 13 relay U13 are connected with power supply, 5 mouthfuls of the 13 relay U13 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 13 relay U13 are connected with the first wake-up signal source W1,9 mouthfuls of the 13 relay U13 are connected with the P1.5 mouth of I/O port one 02, and 10 mouthfuls of the 13 relay U13 are waken up pin K1 with first of tested ECU (Electrical Control Unit) 104 and are connected;

2 mouthfuls of the 14 relay U14 are connected with power supply, 5 mouthfuls of the 14 relay U14 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 14 relay U14 are connected with the second wake-up signal source W2,9 mouthfuls of the 14 relay U14 are connected with the P1.6 mouth of I/O port one 02, and 10 mouthfuls of the 14 relay U14 are waken up pin K2 with second of tested ECU (Electrical Control Unit) 104 and are connected;

Wherein, the model of the 13 relay U13 and the 14 relay U14 is OMRON_G5V-1.

In actual applications, first of tested ECU (Electrical Control Unit) 104 wake pin K1 and second up and wake pin K2 up and be connected with other components and parts by connection terminal X6; The first wake-up signal source W1 is connected with other components and parts by connection terminal X7 with the second wake-up signal source W2.

Concrete principle of work is:

When tested ECU (Electrical Control Unit) 104 is carried out the arousal function test, by the P1.5 mouth of I/O port one 02, control the 13 relay U13, realize that the robotization of the first wake-up signal source W1 input is controlled; The P1.6 mouth of I/O port one 02 is controlled the 14 relay U14, realizes that the robotization of the second wake-up signal source W2 input is controlled., by the control of the P1.5 mouth to I/O port one 02 and P1.6 mouth output signal, realize the arousal function test to tested ECU (Electrical Control Unit) 104.

Another embodiment of the utility model also provides another CAN/LIN bus test circuit, as shown in Figure 7, comprising: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037; Wherein:

Bus interferometer interface module 1035 comprises: the 15 relay U15, the 16 relay U16, the 17 relay U17 and the 18 relay U18; Wherein:

1 mouthful of the 15 relay U15 is connected with power supply, 4 mouthfuls of the 15 relay U15 are connected with the CAN_L line of tested ECU (Electrical Control Unit) 104,8 mouthfuls of CAN_L that receive the bus interferometer of the 15 relay U15 disturb input signal SRESS_CAN_L_IN, 9 mouthfuls of CAN_H that receive the bus interferometer of the 15 relay U15 disturb input signal SRESS_CAN_H_IN, 13 mouthfuls of the 15 relay U15 are connected with the CAN_H line of tested ECU (Electrical Control Unit) 104, and 16 mouthfuls of the 15 relay U15 are connected with the P1.7 mouth of I/O port one 02;

1 mouthful of the 16 relay U16 is connected with power supply, 4 mouthfuls of output CAN_L interference output signals SRESS_CAN_L_OUT of the 16 relay U16,8 mouthfuls of output CAN_L output signal CAN_L_OUT of the 16 relay U16,9 mouthfuls of output CAN_H output signal CAN_H_OUT of the 16 relay U16,13 mouthfuls of output CAN_H interference output signals SRESS_CAN_H_OUT of the 16 relay U16,16 mouthfuls of the 16 relay U16 are connected with the P1.7 mouth of I/O port one 02;

1 mouthful of the 17 relay U17 receives CAN_H output signal CAN_H_OUT, 2 mouthfuls of the 17 relay U17 are connected with power supply, 5 mouthfuls of the 17 relay U17 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 17 relay U17 are connected with the CAN_H line of tested ECU (Electrical Control Unit) 104,9 mouthfuls of the 17 relay U17 are connected with the P2.0 mouth of I/O port one 02, and 10 mouthfuls of the 17 relay U17 are connected with bus test instrument 105;

1 mouthful of the 18 relay U18 receives CAN_L output signal CAN_L_OUT, 2 mouthfuls of the 18 relay U18 are connected with power supply, 5 mouthfuls of the 18 relay U18 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 18 relay U18 are connected with the CAN_L line of tested ECU (Electrical Control Unit) 104,9 mouthfuls of the 18 relay U18 are connected with the P2.1 mouth of I/O port one 02, and 10 mouthfuls of the 18 relay U18 are connected with bus test instrument 105.

Wherein, the model of the 15 relay U15 and the 16 relay U16 is OMRON_G5V-2; The model of the 17 relay U17 and the 18 relay U18 is OMRON_G5V-1.

In actual applications, the CAN bus of tested ECU (Electrical Control Unit) 104 is connected with other components and parts by connection terminal X8; CAN_H disturbs input signal SRESS_CAN_H_IN, CAN_L to disturb input signal SRESS_CAN_L_IN, CAN_H interference output signals SRESS_CAN_H_OUT to be connected with other components and parts by connection terminal X9 with CAN_L interference output signals SRESS_CAN_L_OUT.

Concrete principle of work is:

When independent tested ECU (Electrical Control Unit) was tested, the bus interferometer that uses was CANstress.The P1.7 mouth of I/O port one 02 is connected with the 15 relay U15 and the 16 relay U16, controls simultaneously the 15 relay U15 and two relays of the 16 relay U16, controls interferometer incision bus; The P2.0 mouth of I/O port one 02 is connected with the 17 relay U17, and the P2.1 mouth of I/O port one 02 is connected with the 18 relay U18, with the CAN_H after the incision interferometer and CAN_L signal access bus test instrument 105; The CAN bus of tested ECU (Electrical Control Unit) 104 is introduced by connection terminal X8, and bus interferometer CANstress is connected to another connection terminal X9; By the flexible configuration of the 15 relay U15, the 16 relay U16, the 17 relay U17 and the 18 relay U18, realize the seamless link of interferometer and tested ECU (Electrical Control Unit) 104, complete the disturbed test to tested ECU (Electrical Control Unit) 104.

Another embodiment of the utility model also provides another CAN/LIN bus test circuit, as shown in Figure 8, comprising: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037; Wherein:

Robustness test module 1036 comprises: the 19 relay U19, the 20 relay U20, the 21 relay U21 and the 22 relay U22; Wherein:

1 mouthful of the 19 relay U19 is connected with power supply, 4 mouthfuls of the 19 relay U19 are connected with the CAN_L line of tested ECU (Electrical Control Unit) 104,8 mouthfuls of the 19 relay U19 receive CAN_L robustness input signal ROB_CAN_L_IN, 9 mouthfuls of the 19 relay U19 receive CAN_H robustness input signal ROB_CAN_H_IN, 13 mouthfuls of the 19 relay U19 are connected with the CAN_H line of tested ECU (Electrical Control Unit) 104, and 16 mouthfuls of the 19 relay U19 are connected with the P2.2 mouth of I/O port one 02;

1 mouthful of the 20 relay U20 is connected with power supply, 4 mouthfuls of output CAN_L robustness output signal ROB_CAN_L_OUT of the 20 relay U20,8 mouthfuls of output CAN_L output signal CAN_L_OUT of the 20 relay U20,9 mouthfuls of output CAN_H output signal CAN_H_OUT of the 20 relay U20,13 mouthfuls of output CAN_H robustness output signal ROB_CAN_H_OUT of the 20 relay U20,16 mouthfuls of the 20 relay U20 are connected with the P2.2 mouth of I/O port one 02;

1 mouthful of the 21 relay U21 receives described CAN_H output signal CAN_H_OUT, 2 mouthfuls of the 21 relay U21 are connected with power supply, 5 mouthfuls of the 21 relay U21 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 21 relay U21 are connected with the CAN_H line of tested ECU (Electrical Control Unit) 104,9 mouthfuls of the 21 relay U21 are connected with the P2.3 mouth of I/O port one 02, and 10 mouthfuls of the 21 relay U21 are connected with bus test instrument 105;

1 mouthful of the 22 relay U22 receives CAN_L output signal CAN_L_OUT, 2 mouthfuls of the 22 relay U22 are connected with power supply, 5 mouthfuls of the 22 relay U22 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 22 relay U22 are connected with the CAN_L line of tested ECU (Electrical Control Unit) 104,9 mouthfuls of the 22 relay U22 are connected with the P2.4 mouth of I/O port one 02, and 10 mouthfuls of the 22 relay U22 are connected with bus test instrument 105.

Wherein, the model of the 19 relay U19 and the 20 relay U20 is OMRON_G5V-2; The model of the 21 relay U21 and the 22 relay U22 is OMRON_G5V-1.

In actual applications, the CAN bus of tested ECU (Electrical Control Unit) 104 is connected with other components and parts by connection terminal X10; CAN_H robustness input signal ROB_CAN_H_IN, CAN_L robustness input signal ROB_CAN_L_IN, CAN_H robustness output signal ROB_CAN_H_OUT are connected with other components and parts by connection terminal X11 with CAN_L robustness output signal ROB_CAN_L_OUT.

Concrete principle of work is:

When tested ECU (Electrical Control Unit) 104 was carried out the robustness test, the P2.2 mouth of I/O port one 02 was controlled the 19 relay U19 and two relays of the 20 relay U20 simultaneously, the bus wire harness incision bus that Nm is long; The P2.3 mouth of I/O port one 02 is controlled the 21 relay U21, and the P2.4 mouth of I/O port one 02 is controlled the 22 relay U22, controls robust signal and exports bus test instrument 105 to.The CAN bus of tested ECU (Electrical Control Unit) 104 is introduced by connection terminal X10, and the long bus wire harness of Nm is connected to another connection terminal X11; , by the flexible configuration of the 19 relay U19, the 20 relay U20, the 21 relay U21 and the 22 relay U22, realize the robustness test to tested ECU (Electrical Control Unit) 104.

Another embodiment of the utility model also provides another CAN/LIN bus test circuit, as shown in Figure 9, comprising: terminal matching module 1031, threshold testing module 1032, internal resistance test module 1033, arousal function module 1034, bus interferometer interface module 1035, robustness test module 1036 and short interruption test module 1037; Wherein:

Short interruption test module 1037 comprises: the 23 relay U23, the 24 relay U24, the 25 relay U25, the 26 relay U26, the 27 relay U27, the 28 relay U28, the 29 relay U29, the 30 relay U30, the 31 relay U31 and the 32 relay U32; Wherein:

2 mouthfuls of the 23 relay U23 are connected with power supply, 5 mouthfuls of the 23 relay U23 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 23 relay U23 are connected with the KL30_OUT port, 9 mouthfuls of the 23 relay U23 are connected with the P2.5 mouth of I/O port one 02, and 10 mouthfuls of the 23 relay U23 are connected with the KL30_IN port;

2 mouthfuls of the 24 relay U24 are connected with power supply, 5 mouthfuls of the 24 relay U24 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 24 relay U24 are connected with the KL15_OUT port, 9 mouthfuls of the 24 relay U24 are connected with the P2.6 mouth of I/O port one 02, and 10 mouthfuls of the 24 relay U24 are connected with the KL15_IN port;

2 mouthfuls of the 25 relay U25 are connected with power supply, 5 mouthfuls of the 25 relay U25 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 25 relay U25 are connected with the GND_OUT port, 9 mouthfuls of the 25 relay U25 are connected with the P2.7 mouth of I/O port one 02, and 10 mouthfuls of the 25 relay U25 are connected with the GND_IN port;

2 mouthfuls of the 26 relay U26 are connected with power supply, 5 mouthfuls of the 26 relay U26 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 26 relay U26 are connected with the CAN_H/LIN_OUT port, 9 mouthfuls of the 26 relay U26 are connected with the P3.0 mouth of I/O port one 02, and 10 mouthfuls of the 26 relay U26 are connected with the CAN_H/LIN_IN port;

2 mouthfuls of the 27 relay U27 are connected with power supply, 5 mouthfuls of the 27 relay U27 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 27 relay U27 are connected with the CAN_L_OUT port, 9 mouthfuls of the 27 relay U27 are connected with the P3.1 mouth of I/O port one 02, and 10 mouthfuls of the 27 relay U27 are connected with the CAN_L_IN port;

2 mouthfuls of the 28 relay U28 are connected with power supply, 5 mouthfuls of the 28 relay U28 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 28 relay U28 are connected with the CAN_L_IN port, 9 mouthfuls of the 28 relay U28 are connected with the P3.2 mouth of I/O port one 02, and 10 mouthfuls of the 28 relay U28 are connected with the CAN_H/LIN_IN port;

2 mouthfuls of the 29 relay U29 are connected with power supply, 5 mouthfuls of the 29 relay U29 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 29 relay U29 are connected with the KL30_IN port, 9 mouthfuls of the 29 relay U29 are connected with the P3.3 mouth of I/O port one 02, and 10 mouthfuls of the 29 relay U29 are connected with the CAN_H/LIN_IN port;

2 mouthfuls of the 30 relay U30 are connected with power supply, 5 mouthfuls of the 30 relay U30 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 30 relay U30 are connected with the CAN_L_IN port, 9 mouthfuls of the 30 relay U30 are connected with the P3.4 mouth of I/O port one 02, and 10 mouthfuls of the 30 relay U30 are connected with the KL30_IN port;

2 mouthfuls of the 31 relay U31 are connected with power supply, 5 mouthfuls of the 31 relay U31 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 31 relay U31 are connected with the GND_IN port, 9 mouthfuls of the 31 relay U31 are connected with the P3.5 mouth of I/O port one 02, and 10 mouthfuls of the 31 relay U31 are connected with the CAN_L_IN port;

2 mouthfuls of the 32 relay U32 are connected with power supply, 5 mouthfuls of the 32 relay U32 are connected with 6 mouthfuls, 5 mouthfuls of tie points with 6 mouthfuls of the 32 relay U32 are connected with the CAN_H/LIN_IN port, 9 mouthfuls of the 32 relay U32 are connected with the P3.6 mouth of I/O port one 02, and 10 mouthfuls of the 32 relay U32 are connected with the GND_IN port.

Wherein, the model of the 23 relay U23, the 24 relay U24, the 25 relay U25, the 26 relay U26, the 27 relay U27, the 28 relay U28, the 29 relay U29, the 30 relay U30, the 31 relay U31 and the 32 relay U32 is OMRON_G5V-1.

In actual applications, KL30_IN port, KL15_IN port, GND_IN port, CAN_H/LIN_IN port and CAN_L_IN port are connected with other components and parts by connection terminal X12; KL30_OUT port, KL15_OUT port, GND_OUT port, CAN_H/LIN_OUT port and CAN_L_OUT port are connected with other components and parts by connection terminal X13, and the bus signals of CAN_H/LIN_OUT port and CAN_L_OUT port is inputed to bus test instrument 105.

Concrete principle of work is:

Short interruption test module 1037 is mainly used in the System Integration Test that car load factory carries out for In-vehicle networking, CAN/LIN bus system integration testing need to be with 20～50 tested ECU (Electrical Control Unit) nodes while access networks, need in test process each tested ECU (Electrical Control Unit) CAN/LIN line power supply or ground short circuit, CAN_H is to the CAN_L short circuit, CAN_H or CAN_L open circuit, the LIN line opens circuit, and electric power disconnection, the ground fault such as open circuit is tested.During test, by controlling the short interruption test control signal of I/O port one 02 output, complete the control to each relay, realize the short interruption test of the signal wire that is connected with each relay respectively, bus test instrument 105 is monitored simultaneously in the bus communication behavior that occurs under above-mentioned any situation.Although the advantage of this kind scheme is that the tested amount controller of different car load factory different automobile types is different,, as long as the corresponding quantity that increases the I/O port namely can realize the increase of any amount controller, has good versatility and extendability.The signal wire that need to carry out short circuit, open-circuit operation is connected by the docking terminal, and integrated circuit board uses same terminal to be serially connected with in integrated test system.

Another embodiment of the utility model also provides another CAN/LIN bus test device, as shown in Figure 1, comprising: arbitrary described CAN/LIN bus test circuit 103 in I/O port one 02, bus test instrument 105 and above-described embodiment; Wherein:

Receive the control signal of PC 101 and the I/O port one 02 that the control signal of PC 101 exports CAN/LIN bus test circuit 103 to is connected between PC 101 and CAN/LIN bus test circuit 103;

Receive the test output signal of CAN/LIN bus test circuit 103, and the bus test instrument 105 that test output signal is sent to PC 101 is connected between CAN/LIN bus test circuit 103 and PC 101.

Preferably, I/O port one 02 is NI6509; Bus test instrument 105 is CANoe.In actual applications, when as less in needed module in CAN/LIN bus test circuit 103, I/O port one 02 also can adopt NI6501.

, to the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, realization in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims

1. CAN/LIN bus test circuit, be connected with power supply, it is characterized in that, comprising: terminal matching module, threshold testing module, internal resistance test module, arousal function module, bus interferometer interface module, robustness test module and short interruption test module; Wherein:

2. circuit according to claim 1, is characterized in that, described terminal matching module comprises: the first relay, the second relay, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity and the second electric capacity; Wherein:

16 mouthfuls of the first relay are connected with the P0.0 mouth of described I/O port, 13 mouthfuls of described the first relay are connected with the CAN_H line of described tested ECU (Electrical Control Unit), 9 mouthfuls of described the first relay are connected with an end of the first resistance, the other end of described the first resistance is connected with an end of the second resistance, 8 mouthfuls of the other end of described the second resistance and described the first relay are connected, described the first resistance is connected with an end of the first electric capacity with the tie point of the second resistance, the other end ground connection of described the first electric capacity, 4 mouthfuls of described the first relay are connected with the CAN_L line of described tested ECU (Electrical Control Unit), 1 mouthful of described the first relay is connected with described power supply,

3. circuit according to claim 1, is characterized in that, described threshold testing module comprises: the 3rd relay, the 4th relay, the 5th relay, the 6th relay, the 7th relay, the 5th resistance and the 6th resistance; Wherein:

4. circuit according to claim 1, is characterized in that, described internal resistance test module comprises: the 8th relay, the 9th relay, the tenth relay, the 11 relay, the 12 relay and the 7th resistance; Wherein:

5. circuit according to claim 1, is characterized in that, described arousal function module comprises: the 13 relay and the 14 relay; Wherein:

6. circuit according to claim 1, is characterized in that, described bus interferometer interface module comprises: the 15 relay, the 16 relay, the 17 relay and the 18 relay; Wherein:

7. circuit according to claim 1, is characterized in that, described robustness test module comprises: the 19 relay, the 20 relay, the 21 relay and the 22 relay; Wherein:

8. circuit according to claim 1, it is characterized in that, described short interruption test module comprises: the 23 relay, the 24 relay, the 25 relay, the 26 relay, the 27 relay, the 28 relay, the 29 relay, the 30 relay, the 31 relay and the 32 relay; Wherein:

9. a CAN/LIN bus test device, is characterized in that, comprises the arbitrary described CAN/LIN bus test circuit of claim 1 to 7, I/O port and bus test instrument; Wherein:

10. device according to claim 9, is characterized in that, described I/O port is NI6509; Described bus test instrument is CANoe.