CN203707520U - Connecting device for testing CAN (controller area network) equipment - Google Patents

Abstract

The utility model provides a connecting device for testing CAN (controller area network) equipment, wherein the connecting device is used for connecting to-be-tested equipment and detection equipment. The connecting device comprises a plurality of interfaces, a connecting circuit and a shell. The plurality of interfaces are composed of an interface connected with the to-be-tested equipment, and an interface connected with the detection equipment. The connecting circuit is used for connecting the interfaces and composed of a connecting wire. The shell is used for encapsulating the interfaces and the connecting circuit. One part of each interface is exposed to the surface of the shell. The connecting wire of the connecting circuit is arranged inside the shell. By means of the connecting device disclosed by the present utility model, testers can set up a testing environment more conveniently and more efficiently. Therefore, the testing efficiency is remarkably improved.

Description

For the jockey of CAN testing of equipment

Technical field

The utility model relates to the system based on CAN bus, particularly to the testing equipment based on CAN bus.

Background technology

Fieldbus is to be applied in a kind of bus-type topological network of producing the bottom.The communication network that this bus for field control system, is directly connected with all controlled node serials.Fieldbus is one of focus of nowadays automatic art development, is described as the LAN (Local Area Network) of automatic field, and for dcs realizes between each node, data communication reliably in real time provides strong technical support for it.

CAN, full name is " Controller Area Network ", i.e. controller local area network belongs to the one of fieldbus.CAN bus can effectively be supported distributed control or the serial communication network of controlling in real time, and has formed international standard.

Nowadays, CAN bus is widely used in vehicle control syetem.Vehicle control syetem is developed, in the process of debugging and trouble hunting, need to detect in a large number the equipment of the support CAN bus of various levels.Because the project that will detect is numerous, corresponding to each test item, equipment under test may be different with the circuit connection between checkout equipment, make all may comprise the loaded down with trivial details work that a large amount of circuit connects in each test, and be easy to occur cause connection error to cause the situation of test errors because of tester's carelessness.And every pair of object is tested, may need various connections all to have again, this greatly reduces testing efficiency and test accuracy.

Utility model content

The utility model discloses a kind of jockey that can directly be connected and support multiple test event with tested CAN equipment with checkout equipment, make tester need to frequently not build and remove the connecting circuit between tested CAN equipment and checkout equipment in order to test the different test events of distinct device and/or same equipment.

According to an aspect of the present utility model, a kind of jockey for CAN testing of equipment is provided, this jockey is used for connecting equipment under test and checkout equipment, this test connecting apparatus comprises: multiple interfaces, and described multiple interfaces comprise the interface being connected with described equipment under test and the interface being connected with described checkout equipment; Connecting circuit, described connecting circuit is used for connecting described interface, and described connecting circuit comprises connection wire; And shell, described shell is used for encapsulating described interface and described connecting circuit, and a part for each in described interface is exposed to described case surface, and the described connection wire in described connecting circuit is positioned at described enclosure.

Above-mentioned interface can comprise the second interface P2, the 3rd interface P3, the 8th interface P8 and the 9th interface P9, and wherein the second interface P2 is connected with the 8th interface P8, and the 3rd interface P3 is connected with the 9th interface P9.

Above-mentioned interface also comprises first interface P1 and the 11 interface P11, and wherein first interface P1 is connected with the 11 interface P11.

Jockey disclosed in the utility model, also can be used for the detection to the complex control system based on CAN.In the interface of jockey, can comprise the 12 interface P12, the 12 interface P12 is OBD standard diagnostics interface, the stitch of the corresponding CANH of the 12 interface P12 is connected with the 8th interface P8, the stitch of the corresponding CANL of the 12 interface P12 is connected with the 9th interface P9, and the stitch accordingly of the 12 interface P12 is connected with the 11 interface P11.

In order to support the test to multiple projects, according to comprising the first joint A, the second joint B, the 4th joint D and the 5th joint E in the connecting circuit of jockey of the present utility model, wherein the first joint A is connected with the 11 interface P11, the second joint B is connected with the stitch of the corresponding CANH of the 12 interface P12 with the second interface P2, the 8th interface P8, the 4th joint D is connected with the 11 interface P11, and the 5th joint E is connected with the stitch of the corresponding CANL of the 12 interface P12 with the 3rd interface P3, the 9th interface P9.

Can comprise the 6th interface P6 and the 7th interface P7 according to the external interface part of jockey of the present utility model, connecting circuit part can comprise the 3rd joint C and the 6th joint F, wherein the 6th interface P6 is connected with the 3rd joint C, the 7th interface P7 is connected with the 6th joint F, and interface P6 can be used for being connected with similar devices such as oscilloscopes with P7.

Jockey provided by the utility model also can comprise the 4th interface P4 and the tenth interface P10, and the 4th interface P4 is directly connected with the tenth interface P10 or is connected by second switch SW2.

For testing the wake-up states of single unit under test, above-mentioned jockey can comprise the 5th interface P5, and the 5th interface P5 is directly connected with the tenth interface P10 or is connected by the first switch SW 1.

In the connecting circuit of jockey disclosed in the utility model, can comprise with lower at least one:

The 4th interface P4 is connected with the 8th interface P8 by the 3rd switch SW 3; The 4th interface P4 is connected with the 9th interface P9 by the 4th switch SW 4; The series circuit that the second interface P2 consists of with the first resistance R 1 the 5th switch SW 5 is connected with the 3rd interface P3; And the 8th the series circuit that forms with the second resistance R 2 by the 6th switch SW 6 of interface P8 be connected with the 9th interface P9.

The first resistance and the second resistance can be 120 Ω.

Jockey disclosed in the utility model is encapsulated the connecting circuit between equipment under test and testing equipment, tester is exposed to interface of described jockey shell etc. by control makes described jockey directly apply to the test of the multiple test event of different equipment under tests, can make tester more convenient and build efficiently test environment, significantly improve testing efficiency.

Accompanying drawing explanation

In figure, identical mark represents same or analogous parts.

Fig. 1 shows according to the principle schematic of the jockey for CAN testing of equipment of the execution mode of a simplification of the present utility model; And

Fig. 2 shows according to the schematic diagram of the jockey for CAN testing of equipment of a preferred implementation of the present utility model.

Embodiment

Be noted that, any " interface " or " joint " mentioned in the disclosure can be any one for connector, pin, joint or the interface of circuit connection, and the difference of the name of " interface " and " joint " is just more clear in order to make description of the present utility model.

According to an aspect of the present utility model, a kind of jockey for CAN testing of equipment is provided, this jockey is used for connecting equipment under test and checkout equipment, this test connecting apparatus comprises: multiple interfaces, and described multiple interfaces comprise the interface being connected with described equipment under test and the interface being connected with described checkout equipment; Connecting circuit, described connecting circuit is used for connecting described interface, and described connecting circuit comprises connection wire; And shell, described shell is used for encapsulating described interface and described connecting circuit, and a part for each in described interface is exposed to described case surface, and the described connection wire in described connecting circuit is positioned at described enclosure.

Fig. 1 shows according to the principle schematic of the jockey for CAN testing of equipment of the execution mode of a simplification of the present utility model.In figure, jockey U1 comprises the second interface P2, the 3rd interface P3, the 8th interface P8 and the 9th interface P9, the wire that is connected these interfaces and shell U13, and jockey U1 is connected with host computer U3 with single unit under test (being called for short DUT) U2 respectively.Host computer U3 is configured to the software that operation is analyzed to the received signal and processed.The interface P2 of jockey U1 be connected with CANL interface with the CANH interface of tested CAN equipment U2 respectively with P3 (CANH and CANL can referring to the definition of ISO11898-2 or J1939-11).In jockey U1 inside, the second interface P2 can be connected with P8 by wire, the 3rd interface P3 can with the 9th interface P9 phase.Host computer U3 is connected with jockey U1 with P9 by interface P8, receives the CAN signal from DUT U2, and it is analyzed and is processed via interface P8 and P9.Interface herein can refer to connector, pin, joint or the interface etc. that connect for circuit.Be noted that in test, the power port (not shown) of DUT U2 can directly be connected with power supply or be connected with power supply by jockey U1, and ground port (not shown) can directly be connected to the ground or be connected to the ground by jockey U1.

Fig. 2 shows according to the principle schematic of the jockey for CAN testing of equipment of a preferred implementation of the present utility model.The interface section of jockey U1 in figure comprises that interface P1～P11(is followed successively by first interface～11 interface), OBD standard diagnostics interface (i.e. the 12 interface P12), joint A, B, C, D, E, F(is followed successively by the first joint～six joint) and switch SW 1～SW6(be followed successively by the first switch～six switch).OBD standard diagnostics interface described in the disclosure refers to defined OBD interface in SAEJ1962 or ISO15031-3, OBD standard diagnostics interface comprises multiple stitch, as respectively with CANH, CANL and corresponding stitch, jockey U1 can directly be connected with the whole-control system with the OBD interface matching by the 12 interface P12, the scene that makes jockey disclosed in the utility model not be only applicable to test single unit under test, is also applicable to the detection to the complex control system based on CAN.From interface outwards, jockey U1 can be connected with single unit under test DUT U2 by interface P1～P5, maybe can be connected with the tested control system (not shown) based on CAN by OBD standard diagnostics interface P12, can by interface P6 and P7 and oscilloscope U4 or similar devices be connected and can be connected with the host computer U3 that P9 can analyze the software of CAN signal with operation by interface P8, other the tenth interface P10 outwards can be used for connecting the required power supply of DUT U2, and the 11 interface P11 outwards can be used for connecting ground.From inwardly (being the connecting circuit of jockey U1 inside) of interface, conductor part in the connecting circuit of jockey U1 can be encapsulated in shell U13, as shown in the figure, the stitch of the second interface P2 and the corresponding CANH of the 12 interface OBD standard diagnostics joint is all connected with the 8th interface P8, and these three interfaces are all connected with the second joint B; The stitch of the 3rd interface P3 and the corresponding CANL of the 12 interface is all connected with the 9th interface P9, and these three interfaces are all connected with the 5th joint E; Meanwhile, the stitch accordingly of the 12 interface OBD standard diagnostics joint is connected with the 11 interface P11, and interface P11 is also connected with the 4th joint D with first interface P1, the first joint A; The 3rd joint C is connected with the 6th interface P6, and the 6th joint F is connected with the 7th interface P7; The 4th interface P4 is connected with the tenth interface P10 by second switch SW2; The 5th interface P5 is connected with the tenth interface P10 by the first switch SW 1; The 4th interface P4 is connected with the 8th interface P8 by the 3rd switch SW 3; The 4th interface P4 is connected with the 9th interface P9 by the 4th switch SW 4; The series circuit that the second interface P2 consists of with the first resistance R 1 the 5th switch SW 5 is connected with the 3rd interface P3; The series circuit that the 8th interface P8 consists of with the second resistance R 2 the 6th switch SW 6 is connected with the 9th interface P9.According to the related protocol of CAN test, it is the resistance (referring to ISO11898-2 or SAEJ1939-11) of 120 Ω that the first resistance R 1 and the second resistance R 2 can be selected resistance value.

As shown in the figure, in the preparation before test, jockey U1 to be connected with checkout equipment with equipment under test.If tested object is single DUT U2, jockey U1 can be connected with DUT U2 by the part in P1～P5, wherein first interface P1 can connect the ground port of DUT U2, the second interface P2 can connect the CANH port of DUT U2, the 3rd P3 can connect the CANL port of DUT U2, the 4th interface P4 can connect the power port of DUT U2, and what the 5th interface P5 can meet DUT U2 wakes port (if DUT U2 has arousal function, otherwise P5 externally can be unsettled) up., the tenth interface P10 power supply required with DUT U2 can be connected meanwhile, can be by the 11 interface P11 ground connection.If tested object is the system based on CAN bus, for example whole-control system, jockey U1 can be OBD standard testing interface by the 12 interface P12() be connected with the OBD interface matching in system under test (SUT).Meanwhile, can be by the 11 interface P11 ground connection.Now, interface P1～P5 and P10 externally can be unsettled.Jockey U1 is connected with checkout equipment, comprising: if need to utilize oscilloscope to carry out observation signal, interface P6, P7 can be connected with two probes of oscilloscope U4 respectively; If need to utilize host computer U3 to analyze CAN signal, interface P8, P9 can be connected with the interface of CANL signal with the reception CANH of host computer U3 respectively.

In actual test, can for example, for example, support the test to disparity items by the interconnected and switch (switch SW 1～SW6) of control interface (joint A, B, C, D, E, F), for instance, fault freedom during as fault freedom when fault freedom, CANH or CANL when short circuit is to power supply short circuit over the ground of level signal over the ground, CANH or the CANL of signal condition, CANH or the CANL of the power supply of DUT and wake-up states, CANH and CANL, CANH and CANL short circuit etc., test can design as required, and can be with reference to the protocol-dependent test specification of CAN.Therefore these joints and switch are operated in test for ease of tester, a part for these joints and switch all should be exposed to shell U13 surface.Be DUT U2 if establish tested object,, as long as closed second switch SW2 is to connect DUT U2 and power supply, other switches and interface are all off-state, just can analyze by host computer U3 the CAN signal of DUT U2.Under the state of second switch SW2 closure, if connect the second joint B and the 3rd joint C and be connected the 4th joint D and the 6th joint F(can be also jointing C and E jointing B and F), also can be by the level signal over the ground of oscilloscope U4 observation CANH; If jointing B and E, the bus fault freedom can analyze CANH and CANL short circuit by host computer U3 time; If closed the 3rd switch SW 3, the fault freedom can analyze CANH and power supply short circuit by host computer U3 time, etc.For the DUT U2 of tool arousal function, also can test by closed the first switch SW 1 wake-up states of DUT U2.As shown in the figure, the two ends of the series circuit that the 5th switch SW 5 forms with the first resistance R 1 are connected with P3 with interface P2 respectively, and the two ends of the series circuit that the 6th switch SW 6 forms with the second resistance R 2 are connected with P9 with interface P8 respectively.This is because according to the test specification of CAN bus, when test, between the CANH of DUT and CANL port, will have the resistance of one 120 ohm, and also will have the resistance of one 120 ohm between the CANH of checkout equipment and CANL port.In the inside of some DUT, between its CANH and CANL port, be connected the resistance of one 120 ohm, when this class DUT is tested, can disconnect the 5th SW5, only closed the 6th SW6; If DUT inside is not connected this resistance between its CANH and CANL port, the 5th SW5 and the 6th SW6 need closure.Can be P12 by the 12 interface OBD() standard diagnostics interface is with the control system of test based on CAN, for example, when the connected mode of above-mentioned each joint (joint A, B, C, D, E, F) and the single DUT U2 of test similar, and owing to now no longer needing the first and second resistance, and the supply line of tested control system is not by jockey U1, so do not need control switch SW1～SW6.

The object that these are only example has been listed several test events and corresponding test circuit method of attachment, very many to the test event of CAN equipment in practical operation, and tester can connect based on the flexible control circuit of testing requirement.

In the utility model, the name of various parts is only the object for example, and the parts in reality with identical or similar characteristics and function may have different titles.

Although disclose execution mode of the present utility model for purpose of explanation, it should be understood that as the utility model is not limited to this, and it will be understood by those skilled in the art that the various modifications that do not depart from scope of the present utility model and purport, increase and substitute to be possible.Correspondingly, any and all modifications, variation or equivalent arrangement should take into account scope of the present utility model, and detailed scope of the present utility model is open by the claims by enclosing.

Claims (10)

1. for a jockey for CAN testing of equipment, this jockey is used for connecting equipment under test and checkout equipment, it is characterized in that, this test connecting apparatus comprises:

Multiple interfaces, described multiple interfaces comprise the interface being connected with described equipment under test and the interface being connected with described checkout equipment;

Connecting circuit, described connecting circuit is used for connecting described interface, and described connecting circuit comprises connection wire; And

Shell, described shell is used for encapsulating described interface and described connecting circuit, and a part for each in described interface is exposed to described case surface, and the described connection wire in described connecting circuit is positioned at described enclosure.

2. jockey according to claim 1, it is characterized in that, described interface comprises the second interface (P2), the 3rd interface (P3), the 8th interface (P8) and the 9th interface (P9), wherein said the second interface (P2) is connected with described the 8th interface (P8), and described the 3rd interface (P3) is connected with described the 9th interface (P9).

3. jockey according to claim 2, is characterized in that, described interface comprises first interface (P1) and the 11 interface (P11), and described first interface (P1) is connected with described the 11 interface (P11).

4. jockey according to claim 3, it is characterized in that, described interface comprises the 12 interface (P12), described the 12 interface (P12) is OBD standard diagnostics interface, the stitch of the corresponding CANH of described the 12 interface (P12) is connected with described the 8th interface (P8), the stitch of the corresponding CANL of described the 12 interface (P12) is connected with described the 9th interface (P9), and the stitch accordingly of described the 12 interface (P12) is connected with described the 11 interface (P11).

5. jockey according to claim 4, it is characterized in that, described connecting circuit comprises the first joint (A), the second joint (B), the 4th joint (D) and the 5th joint (E), wherein said the first joint (A) is connected with described the 11 interface (P11), described the second joint (B) and described the second interface (P2), described the 8th interface (P8) is connected with the stitch of the described corresponding CANH of described the 12 interface (P12), described the 4th joint (D) is connected with described the 11 interface (P11), and described the 5th joint (E) and described the 3rd interface (P3), described the 9th interface (P9) is connected with the stitch of the described corresponding CANL of described the 12 interface (P12).

6. jockey according to claim 2, it is characterized in that, described interface comprises the 6th interface (P6) and the 7th interface (P7), described connecting circuit also comprises the 3rd joint (C) and the 6th joint (F), wherein said the 6th interface (P6) is connected with described the 3rd joint (C), and described the 7th interface (P7) is connected with described the 6th joint (F).

7. according to the jockey described in any claim in claim 1～6, it is characterized in that, described interface comprises the 4th interface (P4) and the tenth interface (P10), and described the 4th interface (P4) is directly connected with described the tenth interface (P10) or is connected by second switch (SW2).

8. jockey according to claim 7, is characterized in that, described interface comprises the 5th interface (P5), and described the 5th interface (P5) is directly connected with described the tenth interface (P10) or is connected by the first switch (SW1).

9. jockey according to claim 7, is characterized in that, described connecting circuit comprises with lower at least one:

Described the 4th interface (P4) is connected with described the 8th interface (P8) by the 3rd switch (SW3);

Described the 4th interface (P4) is connected with described the 9th interface (P9) by the 4th switch (SW4);

Described the second interface (P2) is connected with described the 3rd interface (P3) with the series circuit of the first resistance (R1) composition by the 5th switch (SW5); And

Described the 8th interface (P8) is connected with described the 9th interface (P9) with the series circuit of the second resistance (R2) composition by the 6th switch (SW6).

10. jockey according to claim 9, is characterized in that, described the first resistance (R1) and described the second resistance (R2) are all 120 ohm.