CN204669379U

CN204669379U - A kind of CAN network fault simulation equipment

Info

Publication number: CN204669379U
Application number: CN201520270525.7U
Authority: CN
Inventors: 宁胜花; 陈长健; 赵小羽
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2015-04-29
Filing date: 2015-04-29
Publication date: 2015-09-23
Anticipated expiration: 2025-04-29

Abstract

The utility model provides a kind of CAN network fault simulation equipment, comprise: single-throw switch SW1, single-throw switch SW2, commutator SW3 and commutator SW4, one end of described single-throw switch SW1 is connected to collection terminal fault time, and the other end of described single-throw switch SW1 is connected to the b contact of commutator SW3 and the d contact of commutator SW4 respectively; One end of described single-throw switch SW2 is connected to GND, and the other end of described single-throw switch SW2 is connected to a contact of commutator SW3 and the c contact of commutator SW4 respectively; The movable contact spring of described commutator SW3 is connected to CAN_H end, and the movable contact spring of described commutator SW4 is connected to CAN_L end; The b contact of described commutator SW3 is connected with power supply+end respectively with the d contact of commutator SW4.The utility model is simple to operate, for network failure management test provides advantage.

Description

A kind of CAN network fault simulation equipment

Technical field

The utility model relates to a kind of fault simulation equipment, particularly relates to a kind of CAN network fault simulation equipment.

Background technology

CAN can greatly reduce the advantage such as ECU (Electrical Control Unit) connector quantity and wire harness weight because of it, has been widely used in automotive field, and the performance quality of CAN network will affect the safety and reliability of car load, therefore need to evaluate CAN network performance.The reliability of CAN network and maintainability are one of evaluation indexes of network performance, ECU (Electrical Control Unit) state is evaluated network performance when occurring by test failure and after occurring, and fault simulation comprises: simulate the power down of tested ECU (Electrical Control Unit), fall on the ground, CAN_H and power supply or ground short circuit, CAN_L and power supply or ground short circuit, CAN_H and CAN_L while with power supply or ground short circuit, CAN_H and CAN_L short circuit; Its evaluation method is: when fault occurs, and does not require that ECU (Electrical Control Unit) has the ability of transmitting-receiving CAN information, but requires not allow to damage tested ECU (Electrical Control Unit); After fault recovery, initialization can be completed within the regular hour.

In prior art, by power line, ground wire, CAN_H line and power line or ground wire, CAN_L line and power line or ground wire, increase single-throw switch between CAN_H line and CAN_L line, above fault can be realized and occur; But time when how effectively record trouble recovers is the prerequisite of ECU (Electrical Control Unit) CAN communication module initialization time after calculating fault recovery.

In prior art, there are following two technical problems: after the first, test falls on the ground, CAN_H and power supply short circuit, CAN_H and ground short circuit, CAN_L and power supply, CAN_L and ground short circuit, CAN_H and CAN_L short circuit recover, record trouble recovery time, need manually to control two or more single-throw switch simultaneously, be difficult to accomplish simultaneously in this control procedure; The second, testing CAN _ H and CAN_L simultaneously with power supply short circuit, CAN_H and CAN_L simultaneously with ground short circuit fault recovery after, record trouble recovery time, need manually to control at least three single-throw switches, the while of being difficult to accomplish in this control procedure simultaneously.

Summary of the invention

Technical problem to be solved in the utility model needs to provide a kind of simple to operate, for the test of CAN network fault management provides the CAN network fault simulation equipment of advantage.

To this, the utility model provides a kind of CAN network fault simulation equipment, comprise: single-throw switch SW1, single-throw switch SW2, commutator SW3 and commutator SW4, one end of described single-throw switch SW1 is connected to collection terminal fault time, and the other end of described single-throw switch SW1 is connected to the b contact of commutator SW3 and the d contact of commutator SW4 respectively; One end of described single-throw switch SW2 is connected to GND, and the other end of described single-throw switch SW2 is connected to a contact of commutator SW3 and the c contact of commutator SW4 respectively; The movable contact spring of described commutator SW3 is connected to CAN_H end, and the movable contact spring of described commutator SW4 is connected to CAN_L end; The b contact of described commutator SW3 is connected with power supply+end respectively with the d contact of commutator SW4.

Further improvement of the utility model is, also comprises single-throw switch SW5, and described single-throw switch SW5 and CAN_H end is connected.

Further improvement of the utility model is, also comprises single-throw switch SW7, and described single-throw switch SW7 and CAN_L end is connected.

Further improvement of the utility model is, also comprises single-throw switch SW6, and one end of described single-throw switch SW6 is held with single-throw switch SW5 with CAN_H respectively and is connected, and the other end of described single-throw switch SW6 is held with single-throw switch SW7 and CAN_L respectively and is connected.

Further improvement of the utility model is, also comprises oscilloscope, and described oscillographic acquisition channel is held with CAN_H respectively, CAN_L holds and is connected with collection terminal fault time.

Further improvement of the utility model is, described oscilloscope by CAN_H hold, CAN_L end, fault time collection terminal and oscillographic ground wire be connected to GND.

Further improvement of the utility model is, also comprise the one or three throw switch, three contacts of described one or three throw switch are connected with single-throw switch SW1 with the b contact of commutator SW3, the d contact of commutator SW4 respectively, and the movable contact spring of described one or three throw switch is connected with power supply+end.

Further improvement of the utility model is, also comprise the two or three throw switch, described 23 three contacts of throwing out are connected with single-throw switch SW2 with a contact of commutator SW3, the c contact of commutator SW4 respectively, and the movable contact spring of described two or three throw switch is connected with GND.

Compared with prior art, the beneficial effects of the utility model are: by increasing commutator, can realize falling on the ground, CAN_H end and power supply+terminal shortcircuit, CAN_H hold hold with ground short circuit, CAN_L and to hold with power supply+terminal shortcircuit, CAN_L and after ground short circuit, CAN_H hold and CAN_L terminal shortcircuit recovers, and the test of failure recovery time, the utility model is simple to operate, for network failure management test provides advantage, single ECU (Electrical Control Unit), integrated and car load network failure test can be realized by described CAN network fault simulation equipment; On this basis, can also increase by three throw switch be passed through, CAN_H end can be realized and CAN_L end hold with power supply+terminal shortcircuit, CAN_H simultaneously and CAN_L holds while with ground short circuit fault recovery after, and failure recovery time is tested.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of embodiment of the utility model.

Embodiment

Below in conjunction with accompanying drawing, preferably embodiment of the present utility model is described in further detail.

As shown in Figure 1, this example provides a kind of CAN network fault simulation equipment, comprise: single-throw switch SW1, single-throw switch SW2, commutator SW3 and commutator SW4, one end of described single-throw switch SW1 is connected to collection terminal fault time, and the other end of described single-throw switch SW1 is connected to the b contact of commutator SW3 and the d contact of commutator SW4 respectively; One end of described single-throw switch SW2 is connected to GND, and the other end of described single-throw switch SW2 is connected to a contact of commutator SW3 and the c contact of commutator SW4 respectively; The movable contact spring of described commutator SW3 is connected to CAN_H end, and the movable contact spring of described commutator SW4 is connected to CAN_L end; The b contact of described commutator SW3 is connected with power supply+end respectively with the d contact of commutator SW4.Fig. 1 is the schematic diagram of this routine described CAN network fault simulation equipment.

This example also comprises single-throw switch SW5, single-throw switch SW6 and single-throw switch SW7, described single-throw switch SW5 and CAN_H end is connected, described single-throw switch SW7 and CAN_L end is connected, one end of described single-throw switch SW6 is held with single-throw switch SW5 with CAN_H respectively and is connected, and the other end of described single-throw switch SW6 is held with single-throw switch SW7 and CAN_L respectively and is connected.

This example also comprises oscilloscope, and described oscillographic acquisition channel is held with CAN_H respectively, CAN_L holds and is connected with collection terminal fault time, described oscilloscope by CAN_H hold, CAN_L end, fault time collection terminal and oscillographic ground wire be connected to GND.This example adopts the oscilloscope of at least three acquisition channels, and collection CAN_H section, CAN_L end, power supply 0+ and oscilloscope ground wire are connected to GND.

This example can also comprise the one or three throw switch and the two or three throw switch, three contacts of described one or three throw switch are connected with single-throw switch SW1 with the b contact of commutator SW3, the d contact of commutator SW4 respectively, and the movable contact spring of described one or three throw switch is connected with power supply+end; Described 23 three contacts of throwing out are connected with single-throw switch SW2 with a contact of commutator SW3, the c contact of commutator SW4 respectively, and the movable contact spring of described two or three throw switch is held with GND and is connected.

In Fig. 1, power supply 0+ is collection terminal fault time, for gathering the time and time of fault recovery that fault occurs, power supply+end is power supply, and GND is; The power down failover procedure of this example is realized by single-throw switch SW1; Fall on the ground recovery process to have been come by commutator control single-throw switch SW1 and single-throw switch SW2; CAN_H end has been come by the b contact of commutator SW3 and single-throw switch SW1 with power supply short circuit recovery process; CAN_H end has been come by a contact of commutator SW3 and single-throw switch SW1 with ground short circuit recovery process; CAN_L end and power supply short circuit recovery process, come by the d contact of commutator SW4 and single-throw switch SW1; CAN_L end and ground short circuit recovery process, come by the c contact of commutator SW4 and single-throw switch SW1; CAN_H end has been come by single-throw switch SW6 and single-throw switch SW1 with CAN_L terminal shortcircuit recovery process.This example can also realize CAN_H end and CAN_L end simultaneously with power supply short circuit recovery process, namely come by the b contact of the one or three throw switch control commutator SW3, the d contact of commutator SW4 and single-throw switch SW1; Realize CAN_H end and CAN_L end simultaneously with ground short circuit failover procedure, namely come by a contact of the two or three throw switch control commutator SW3, the c contact of commutator SW4 and single-throw switch SW1.

The principle of this routine described CAN network fault simulation equipment is simple, easy to operate, mutually can be combined by multithrow switch, conveniently realizes the test of CAN network fault management; Not only can be used in the CAN network fault test of single ECU (Electrical Control Unit), the fault management test of integrated network and car load network can also be realized.

The embodiment of the above is better embodiment of the present utility model; not limit concrete practical range of the present utility model with this; scope of the present utility model comprises and is not limited to this embodiment, and the equivalence change that all shapes according to the utility model, structure are done is all in protection range of the present utility model.

Claims

1. a CAN network fault simulation equipment, it is characterized in that, comprise: single-throw switch SW1, single-throw switch SW2, commutator SW3 and commutator SW4, one end of described single-throw switch SW1 is connected to collection terminal fault time, and the other end of described single-throw switch SW1 is connected to the b contact of commutator SW3 and the d contact of commutator SW4 respectively; One end of described single-throw switch SW2 is connected to GND, and the other end of described single-throw switch SW2 is connected to a contact of commutator SW3 and the c contact of commutator SW4 respectively; The movable contact spring of described commutator SW3 is connected to CAN_H end, and the movable contact spring of described commutator SW4 is connected to CAN_L end; The b contact of described commutator SW3 is connected with power supply+end respectively with the d contact of commutator SW4.

2. CAN network fault simulation equipment according to claim 1, is characterized in that, also comprise single-throw switch SW5, and described single-throw switch SW5 and CAN_H end is connected.

3. CAN network fault simulation equipment according to claim 2, is characterized in that, also comprise single-throw switch SW7, and described single-throw switch SW7 and CAN_L end is connected.

4. CAN network fault simulation equipment according to claim 3, it is characterized in that, also comprise single-throw switch SW6, one end of described single-throw switch SW6 is held with single-throw switch SW5 with CAN_H respectively and is connected, and the other end of described single-throw switch SW6 is held with single-throw switch SW7 and CAN_L respectively and is connected.

5. the CAN network fault simulation equipment according to Claims 1-4 any one, is characterized in that, also comprise oscilloscope, and described oscillographic acquisition channel is held with CAN_H respectively, CAN_L holds and is connected with collection terminal fault time.

6. CAN network fault simulation equipment according to claim 5, is characterized in that, described oscilloscope by CAN_H hold, CAN_L end, fault time collection terminal and oscillographic ground wire be connected to GND.

7. the CAN network fault simulation equipment according to Claims 1-4 any one, it is characterized in that, also comprise the one or three throw switch, three contacts of described one or three throw switch are connected with single-throw switch SW1 with the b contact of commutator SW3, the d contact of commutator SW4 respectively, and the movable contact spring of described one or three throw switch is connected with power supply+end.

8. the CAN network fault simulation equipment according to Claims 1-4 any one, it is characterized in that, also comprise the two or three throw switch, described 23 three contacts of throwing out are connected with single-throw switch SW2 with a contact of commutator SW3, the c contact of commutator SW4 respectively, and the movable contact spring of described two or three throw switch is held with GND and is connected.