CN203490534U - CAN bus test box and testing device for testing CAN network of automobile - Google Patents
CAN bus test box and testing device for testing CAN network of automobile Download PDFInfo
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- CN203490534U CN203490534U CN201320588559.1U CN201320588559U CN203490534U CN 203490534 U CN203490534 U CN 203490534U CN 201320588559 U CN201320588559 U CN 201320588559U CN 203490534 U CN203490534 U CN 203490534U
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Abstract
The utility model provides a CAN bus test box for testing a CAN network of an automobile. The CAN network comprises a CAN bus and a plurality of controllers. The CAN bus test box comprises a plurality of power supply interfaces, a plurality of ignition switch interfaces, a ground terminal and a CAN interface, wherein the plurality of power supply interfaces and the plurality of ignition switch interfaces are both connected with the anode of a power supply and are both connected with and in one-to-one correspondence to the plurality controllers. A plurality of power switches are in one-to-one correspondence to the plurality of power supply interfaces. A plurality of ignition switches are in one-to-one correspondence to the plurality of ignition switch interfaces. The power switches and the ignition switches are closed to control the controllers of the CAN bus test box. The ground terminal is connected with the plurality of controllers and the cathode of the power supply. The CAN interface is used for connecting test equipment and the CAN bus. The CAN bus test box is advantaged by being simple to use, flexible in test, and true and accurate in test result. The utility model also provides a testing device for testing a CAN network of an automobile.
Description
Technical field
The utility model relates to field of automobile, particularly a kind of CAN bus test box and proving installation for testing automobile CAN network.
Background technology
In the evolution of automobile, for security, comfortableness, convenience, low public hazards and requirement cheaply, various electronic control systems have been developed out.Due to data type that between these control system, signal post uses and the requirement of reliability is not quite similar, therefore, the quantity of wire harness also increases thereupon.In order to meet the requirement of data high-speed communication and minimizing wire harness quantity, CAN bus has obtained greatly application, and has occurred corresponding ISO international standard.
Because the correct communication between controller is the prerequisite that realizes various functions, so car load factory can formulate corresponding CAN bus specification to retrain the communication behavior of each controller, and first whether the communication of access control device is errorless before access control device function.Particularly, the CAN bus test that car load factory carries out is divided into three phases: unit bus test stage, system bus test phase and real vehicle bus test stage.Wherein front two tests are carried out in laboratory, and real vehicle test is carried out on real vehicle.
As shown in Figure 1, be the schematic diagram of unit bus test.What unit bus test was paid close attention to is whether single controller meets the requirement of CAN bus specification, and tested controller during test only has one, thereby avoided directly carrying out the phenomenon that system bus test cannot orientation problem, occurs.As shown in Figure 2, the schematic diagram of testing for system bus.System bus test is paid close attention to is the communication whether a plurality of controllers in whole CAN network can be errorless, can in laboratory, simulate more really the CAN bus communication situation on real vehicle.In the order of test, what first carry out is unit bus test, only, after the unit testing of all tested controllers is qualified, just can puts together and carry out system bus test, and be finally real vehicle bus test.
There is following shortcoming in existing measuring technology:
1, when carrying out unit testing, the CAN bus signals attribute test of tested controller output is very important, and the quality of signal quality has directly determined the correctness of communication and whether had external electromagnetic interference (EMI).Signal quality is except relevant with the CAN peripheral circuit of tested controller itself, also relevant with the CAN peripheral circuit of other controllers on CAN network.Because the CAN peripheral circuit of each controller is not quite similar, so when unit testing, general way is to carry out the CAN peripheral circuit of other controllers in approximate simulation bus at cross-over connection terminal resistance between CAN bus.The CAN signal now recording is compared and is also had a little difference with actual signal on real vehicle, and actual signal can only wait until that system testing could verify, thereby causes scenting a hidden danger in time.
2, when carrying out unit testing, whether the cycle message that meeting Focus Control device sends meets communication specification requirement, during test, the cycle whether there is deviation when being concerned about that tested controller sends alone, more be concerned about whether the transmission periodic deviation of this controller when other controllers are all online can be accepted, and this cannot provide clear and definite conclusion when unit testing.
3,, when carrying out unit testing, when also can pay close attention to when the abnormal off-line of other controllers and recovering online, whether tested controller has taked correct monitoring mechanism.Now need the proper communication and the situation that stops communicating by letter of other controllers of use test equipment simulating, there is accurate requirement time online to controller due to test result and off-line, so write a large amount of programs, imitate this test environment, cause test procedure very complicated, not easy care.
4, when carrying out unit testing, often need to obtain the accurate power-on time of controller, the error that manually powers on is excessive, is mostly to read by oscillograph while testing in the past, and the increase of testing apparatus causes method more complicated.
5, when carrying out unit testing, can manufacture between CAN line, CAN line and battery positive voltage, CAN line is connected with the short circuit of battery terminal negative, is mostly to adopt manually overlap joint while testing in the past, if careless connection error is easy to controller to damage.
Although 6 have passed through unit testing, most of communication issue can be found and solve, and while carrying out system testing, also can have some problems, for orientation problem, needs the controller of pulling out one by one, wastes time and energy.
Utility model content
The utility model is intended at least one of solve the problems of the technologies described above.
For this reason, an object of the present utility model is to propose a kind of CAN bus test box of the CAN network for testing automobile, and this testing cassete has and uses simple, test flexibly, test result truly, advantage accurately, and can effectively shorten the test duration, save testing cost.
Another object of the present utility model is to propose a kind of proving installation of the CAN network for testing automobile.
To achieve these goals, the utility model first aspect provides a kind of CAN bus test box of the CAN network for testing automobile, described CAN network comprises CAN bus and a plurality of controllers that are connected with described CAN bus, described CAN bus test box comprises: be respectively used to and anodal a plurality of power supply interfaces and a plurality of ignition switch interface being connected of power supply, described a plurality of power supply interface and described a plurality of controllers are corresponding and for being connected with described a plurality of controllers one by one, described a plurality of ignition switch interface and described a plurality of controllers are corresponding and for being connected with described a plurality of controllers one by one, a plurality of power switches and a plurality of ignition switch, described a plurality of power switch is connected correspondingly with described a plurality of power supply interfaces, described a plurality of ignition switch is connected correspondingly with described a plurality of ignition switch interfaces, and described power switch and described ignition switch are closed for controlling the controller of the described CAN bus test box of access, earth terminal, described earth terminal is connected with described power cathode with described a plurality of controllers, so that described a plurality of controller ground connection, and CAN interface, described CAN interface is respectively used to be connected with described CAN bus with testing apparatus, to test accessing the controller of described CAN bus test box.
According to the CAN bus test box of the CAN network for testing automobile of the present utility model, can make testing apparatus articulate a plurality of controllers simultaneously, and control being connected and disconnection of a plurality of controllers and CAN bus by switch independently, thereby, can carry out unit testing and system testing to the CAN network of automobile, when unit testing, except tested controller, other controllers in CAN bus, have been connected, thereby not only can obtain the CAN bus waveform more approaching in real vehicle situation, but also can avoid the controller not powering on to cause harmful effect to the result of unit testing.In addition, when unit testing, if need other controllers to participate in communication, can simulate more really CAN bus communication situation on real vehicle by it is powered on and is accessed test environment, make test result more true, accurate.And when system testing, the power or power-down by certain or some controllers, realizes its temporarily removing from CAN network, fast and easy, the controller that searches problem accurately.
In addition, according to the CAN bus test box of the above-mentioned CAN network for testing automobile of the utility model, can also there is following additional technical characterictic:
In the utility model, described CAN interface comprises a CAN interface and the 2nd CAN interface, and a described CAN interface is connected with the CAN_H bus of described CAN bus, and described the 2nd CAN interface is connected with the CAN_L bus of described CAN bus.
In the utility model, described CAN bus test box also comprises: be arranged on the first short circuiting switch between a described CAN interface and described the 2nd CAN interface.
In the utility model, described CAN bus test box also comprises: be arranged on the second short circuiting switch between a described CAN interface and described positive source.
In the utility model, described CAN bus test box also comprises: be arranged on the 3rd short circuiting switch between a described CAN interface and described power cathode.
In the utility model, described CAN bus test box also comprises: be arranged on the 4th short circuiting switch between described the 2nd CAN interface and described positive source.
In the utility model, described CAN bus test box also comprises: be arranged on the 5th short circuiting switch between described the 2nd CAN interface and described power cathode.
In the utility model, described a plurality of power switches, a plurality of ignition switch, described the first short circuiting switch to the five short circuiting switches are relay.
In the utility model, described CAN bus test box also comprises: on-off controller, described on-off controller is connected with described a plurality of power switches, described a plurality of ignition switches, described the first short circuiting switch to the five short circuiting switches respectively, and described a plurality of power switches, described a plurality of ignition switches, described the first short circuiting switch to the five short circuiting switches are controlled by described on-off controller.
The utility model second aspect also provides a kind of proving installation of the CAN networking for testing automobile, and described CAN network comprises CAN bus and a plurality of controllers that are connected with described CAN bus, and described proving installation comprises: power supply; Testing apparatus; And the CAN bus test box of the above-mentioned described CAN network for testing automobile providing of the utility model.
According to the proving installation at the CAN networking for testing automobile of the present utility model, can make testing apparatus articulate a plurality of controllers simultaneously, and control being connected and disconnection of a plurality of controllers and CAN bus by switch independently, thereby, can carry out unit testing and system testing to the CAN network of automobile, when unit testing, except tested controller, other controllers in CAN bus, have been connected, thereby not only can obtain the CAN bus waveform more approaching in real vehicle situation, but also can avoid the controller not powering on to cause harmful effect to the result of unit testing.In addition, when unit testing, if need other controllers to participate in communication, can simulate more really CAN bus communication situation on real vehicle by it is powered on and is accessed test environment, make test result more true, accurate.And when system testing, the power or power-down by certain or some controllers, realizes its temporarily removing from CAN network, fast and easy, the controller that searches problem accurately.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is the schematic diagram of existing automobile unit bus test;
Fig. 2 is the schematic diagram of existing automotive system bus test;
Fig. 3 is according to the structural drawing of the CAN bus test box of the CAN network for testing automobile of an embodiment of the utility model;
Fig. 4 is according to the structural drawing of the CAN bus testing system of the CAN bus test box of the CAN network for automobile of an embodiment of the utility model; With
Fig. 5 is according to the structural drawing of the CAN bus test box of the CAN network for testing automobile of another embodiment of the utility model.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.
Below in conjunction with accompanying drawing 3-5, describe according to the CAN bus test box of the CAN network for testing automobile of the utility model embodiment and there is its proving installation.
Fig. 3 is according to the structural drawing of the CAN bus test box of the CAN network for testing automobile of an embodiment of the utility model.As shown in Figure 3, according to the CAN bus test box 100 of the CAN network for testing automobile of an embodiment of the utility model, wherein, CAN network comprises CAN bus and a plurality of controllers that are connected with CAN bus, and this CAN bus test box comprises: CAN interface 110, a plurality of power supply interface 120, a plurality of ignition switch interface 130, a plurality of power switch 140, a plurality of ignition switch 150 and earth terminal 160.
Particularly, a plurality of power supply interfaces 120 are respectively used to be connected with power supply is anodal with a plurality of ignition switch interfaces 130, a plurality of power supply interfaces 120 and a plurality of controllers are corresponding and for being connected with a plurality of controllers one by one, and a plurality of ignition switch interfaces 130 and a plurality of controllers are corresponding and for being connected with a plurality of controllers one by one.
A plurality of power switches 140 are connected correspondingly with a plurality of power supply interfaces 120, a plurality of ignition switches 150 are connected correspondingly with a plurality of ignition switch interfaces 130, and power switch 140 and ignition switch 150 are closed for controlling the controller of access CAN bus test box 100.Particularly, when power switch 140 closures, by 120 pairs of coupled controllers of corresponding power supply interface, powered, when ignition switch 150 closures, by 130 pairs of coupled controllers of corresponding ignition switch interface, provide ignition switch signal, in other words, control corresponding controller access CAN bus test box 100.
Earth terminal 160 is connected with power cathode with a plurality of controllers, so that a plurality of controller ground connection.
CAN interface 110 is respectively used to be connected with CAN bus with testing apparatus, so that the controller of access CAN bus test box 100 is tested.Particularly, testing apparatus is undertaken alternately by CAN interface and CAN bus, thereby obtains the data message of the controller of the access CAN bus test box 100 transmitting in CAN bus, and according to the data message collecting, controller is tested.
Further, shown in Fig. 4, CAN interface 110 further comprises: a CAN interface 111 and the 2nd CAN interface 112, and a CAN interface 111 is connected with the CAN_H bus of CAN bus, and the 2nd CAN bus interface is connected with the CAN_L bus of CAN bus.Particularly, in Fig. 4, one side connecting test equipment and power supply of CAN bus test box 100, testing apparatus can be passed through CAN bus test box 100 data acquisition bus data and waveforms, power supply is used to a plurality of controllers (the tested controller 1 in Fig. 4 is to tested controller n, and n is more than or equal to 1) that operating voltage is provided.The opposite side of CAN bus test box 100 connects the CAN network being comprised of a plurality of controllers, wherein, each controller comprises KL30 pin, KL15 pin and GND pin, KL30 pin is connected with positive source by CAN bus test box 100, KL15 pin is connected with the ignition switch 150 of CAN bus test box 100, GND pin is connected with power cathode, for making a plurality of controllers ground connection when needed.
Shown in Fig. 5, this CAN bus test box 100 also comprises: in the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200, the 5th short circuiting switch 210 and on-off controller 220(figure, do not mark).
Particularly, the first short circuiting switch 170 is arranged between a CAN interface 111 and the 2nd CAN interface 112, for controlling whether short circuit of the CAN_H bus of CAN bus and CAN_L bus, when the first short circuiting switch 170 closure, CAN_H bus and CAN_L bus short circuit.
The second short circuiting switch 180 is arranged between a CAN interface 111 and positive source, for controlling whether short circuit of CAN_H bus and positive source, and when the second short circuiting switch 180 is when closed, CAN_H bus and positive source short circuit.
The 3rd short circuiting switch 190 is arranged between a CAN interface 111 and power cathode, for controlling whether short circuit of CAN_H bus and power cathode, and when the 3rd short circuiting switch 190 is when closed, CAN_H bus and power cathode short circuit.
The 4th short circuiting switch 200 is arranged between the 2nd CAN interface 112 and positive source, for controlling whether short circuit of CAN_L bus and positive source, and when the 4th short circuiting switch 200 is when closed, CAN_L bus and positive source short circuit.
The 5th short circuiting switch 210 is arranged between the 2nd CAN interface 112 and power cathode, for controlling whether short circuit of CAN_L bus and power cathode, and when the 5th short circuiting switch 210 is when closed, CAN_L bus and power cathode short circuit.
On-off controller 220 is connected with the 5th short circuiting switch 210 with a plurality of power switches 140, a plurality of ignition switch 150, the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200 respectively, for controlling disconnection and the closure of a plurality of power switches 140, a plurality of ignition switch 150, the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200 and the 5th short circuiting switch 210.
In a preferred embodiment of the present utility model, above-mentioned a plurality of power switches 140, a plurality of ignition switch 150, the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200 and the 5th short circuiting switch 210 are relay.
As a concrete example, again in conjunction with Fig. 5, in Fig. 5, comprise a plurality of switch Relay_X_1 and a plurality of switch Relay_X_2(switch Relay_X_1 and switch Relay_X_2 and be relay).Wherein, whether switch Relay_X_1 connects for controlling the KL30 pin of controller X; Whether switch Relay_X_2 connects for controlling the KL15 pin of controller X.Particularly, for example, when X is 1, be whether switch Relay_1_1 connects for controlling the KL30 pin of controller 1, whether switch Relay_1_2 connects for controlling the KL15 of controller 1, and when switch Relay_1_1 is closed, the KL30 pin of controller 1 is connected, when switch Relay_1_2 is closed, the KL15 pin of controller 1 is connected, and when switch Relay_1_1 and switch Relay_1_2 while closure, in normal this test circuit of access of controller 1, carries out work.In like manner, when X is 2, whether switch Relay_2_1 and switch Relay_2_2 control controller 2 access in test circuit.When X is n, whether switch Relay_n_1 and switch Relay_n_2 control controller n and access in test circuit.
In Fig. 5, when connecting two corresponding relays of some controllers, disconnect the relay that other controllers are corresponding.Now only have the power supply of a controller to be switched on, in normal operating conditions, whole system is equivalent to carry out unit testing.For example: when only having switch Relay_1_1 and switch Relay_1_2 closed, i.e. controller 1 energising, in normal operating conditions, now, test circuit is tested controller 1.It should be noted that, although other controllers are not switched on, but the peripheral circuit of these controllers has been access in CAN network, the waveform of the tested controller 1 now gathering approaches the true waveform of real vehicle more, therefore, test result is more true, reliable, thereby is more conducive to find rapidly the problem of existence.Further, at controller 1, carry out cycle or off-line on-line monitoring etc. while needing test item that other controllers participate in, can be by disconnecting or two relays corresponding to closed other controllers make its online or off-line.For example: add while needing controller 2 online, can connect controller 2 by Closing Switch Relay_2_1 and switch Relay_2_2; When being completed while needing controller 2 to roll off the production line, cut-off switch Relay_2_1 and switch Relay_2_2, to control controller 2 power-off.
Further, when carrying out network management test, can produce local wakeup time by disconnection or switch Relay_X_2 corresponding to closing operator.Due to the disconnection of relay with closedly can conveniently obtain by programmed control the time performing an action, make test result more accurate.
When carrying out short-circuit test, can realize short circuit by the closure of programmed control the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200 and the 5th short circuiting switch 210 and move, the mistake of having avoided manual operation to cause.
After unit testing completes, carry out system testing, when carrying out system testing, if need to investigate orientation problem, the power supply of breaking controller successively, observation test result, thus find out easily fail-safe control device.
According to the CAN bus test box of the CAN network for testing automobile of the present utility model, can make testing apparatus articulate a plurality of controllers simultaneously, and control being connected and disconnection of a plurality of controllers and CAN bus by switch independently, thereby, can carry out unit testing and system testing to the CAN network of automobile, when unit testing, except tested controller, other controllers in CAN bus, have been connected, thereby not only can obtain the CAN bus waveform more approaching in real vehicle situation, but also can avoid the controller not powering on to cause harmful effect to the result of unit testing.In addition, when unit testing, if need other controllers to participate in communication, can simulate more really CAN bus communication situation on real vehicle by it is powered on and is accessed test environment, make test result more true, accurate.And when system testing, the power or power-down by certain or some controllers, realizes its temporarily removing from CAN network, fast and easy, the controller that searches problem accurately.In addition, this CAN bus test box is realized the automatic operation to power switch and ignition switch by on-off controller, makes test process more safe and reliable, the generation of the situation such as misconnection while having avoided manual connect.Generally speaking, this CAN bus test box can make test process easier, flexible and reliable, has also saved testing cost simultaneously, and test result is more true, accurate, further, has improved the security performance of complete machine.
The utility model also provides a kind of CAN network testing device for testing automobile, wherein, CAN network comprises CAN bus and a plurality of controllers that are connected with CAN bus, and this proving installation comprises: the CAN bus test box 100 of the CAN network for testing automobile that power supply, testing apparatus and the utility model above-described embodiment provide.
Particularly, Fig. 3 is according to the structural drawing of the CAN bus test box of the CAN network for testing automobile of an embodiment of the utility model.As shown in Figure 3, according to the CAN bus test box 100 of the CAN network for testing automobile of an embodiment of the utility model, wherein, CAN network comprises CAN bus and a plurality of controllers that are connected with CAN bus, and this CAN bus test box comprises: CAN interface 110, a plurality of power supply interface 120, a plurality of ignition switch interface 130, a plurality of power switch 140, a plurality of ignition switch 150 and earth terminal 160.
Particularly, a plurality of power supply interfaces 120 are respectively used to be connected with power supply is anodal with a plurality of ignition switch interfaces 130, a plurality of power supply interfaces 120 and a plurality of controllers are corresponding and for being connected with a plurality of controllers one by one, and a plurality of ignition switch interfaces 130 and a plurality of controllers are corresponding and for being connected with a plurality of controllers one by one.
A plurality of power switches 140 are connected correspondingly with a plurality of power supply interfaces 120, a plurality of ignition switches 150 are connected correspondingly with a plurality of ignition switch interfaces 130, and power switch 140 and ignition switch 150 are closed for controlling the controller of access CAN bus test box 100.Particularly, when power switch 140 closures, by 120 pairs of coupled controllers of corresponding power supply interface, powered, when ignition switch 150 closures, by 130 pairs of coupled controllers of corresponding ignition switch interface, provide ignition switch signal, in other words, control corresponding controller access CAN bus test box 100.
Earth terminal 160 is connected with power source loads with a plurality of controllers, so that a plurality of controller ground connection.
CAN interface 110 is respectively used to be connected with CAN bus with testing apparatus, so that the controller of access CAN bus test box 100 is tested.Particularly, testing apparatus is undertaken alternately by CAN interface and CAN bus, thereby obtains the data message of the controller of the access CAN bus test box 100 transmitting in CAN bus, and according to the data message collecting, controller is tested.
Further, shown in Fig. 4, CAN interface 110 further comprises: a CAN interface 111 and the 2nd CAN interface 112, and a CAN interface 111 is connected with the CAN_H bus of CAN bus, and the 2nd CAN bus interface is connected with the CAN_L bus of CAN bus.Particularly, in Fig. 4, one side connecting test equipment and power supply of CAN bus test box 100, testing apparatus can be passed through CAN bus test box 100 data acquisition bus data and waveforms, power supply is used to a plurality of controllers (the tested controller 1 in Fig. 4 is to tested controller n, and n is more than or equal to 1) that operating voltage is provided.The opposite side of CAN bus test box 100 connects the CAN network being comprised of a plurality of controllers, wherein, each controller comprises KL30 pin, KL15 pin and GND pin, KL30 pin is connected with positive source by CAN bus test box 100, KL15 pin is connected with the ignition switch 150 of CAN bus test box 100, GND pin is connected with power cathode, for making a plurality of controllers ground connection when needed.
Shown in Fig. 5, this CAN bus test box 100 also comprises: in the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200, the 5th short circuiting switch 210 and on-off controller 220(figure, do not mark).
Particularly, the first short circuiting switch 170 is arranged between a CAN interface 111 and the 2nd CAN interface 112, for controlling whether short circuit of the CAN_H bus of CAN bus and CAN_L bus, when the first short circuiting switch 170 closure, CAN_H bus and CAN_L bus short circuit.
The second short circuiting switch 180 is arranged between a CAN interface 111 and positive source, for controlling whether short circuit of CAN_H bus and positive source, and when the second short circuiting switch 180 is when closed, CAN_H bus and positive source short circuit.
The 3rd short circuiting switch 190 is arranged between a CAN interface 111 and power cathode, for controlling whether short circuit of CAN_H bus and power cathode, and when the 3rd short circuiting switch 190 is when closed, CAN_H bus and power cathode short circuit.
The 4th short circuiting switch 200 is arranged between the 2nd CAN interface 112 and positive source, for controlling whether short circuit of CAN_L bus and positive source, and when the 4th short circuiting switch 200 is when closed, CAN_L bus and positive source short circuit.
The 5th short circuiting switch 210 is arranged between the 2nd CAN interface 112 and power cathode, for controlling whether short circuit of CAN_L bus and power cathode, and when the 5th short circuiting switch 210 is when closed, CAN_L bus and power cathode short circuit.
On-off controller 220 is connected with the 5th short circuiting switch 210 with a plurality of power switches 140, a plurality of ignition switch 150, the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200 respectively, for controlling disconnection and the closure of a plurality of power switches 140, a plurality of ignition switch 150, the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200 and the 5th short circuiting switch 210.
In a preferred embodiment of the present utility model, above-mentioned a plurality of power switches 140, a plurality of ignition switch 150, the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200 and the 5th short circuiting switch 210 are relay.
As a concrete example, again in conjunction with Fig. 5, in Fig. 5, comprise a plurality of switch Relay_X_1 and a plurality of switch Relay_X_2(switch Relay_X_1 and switch Relay_X_2 and be relay).Wherein, whether switch Relay_X_1 connects for controlling the KL30 pin of controller X; Whether switch Relay_X_2 connects for controlling the KL15 pin of controller X.Particularly, for example, when X is 1, be whether switch Relay_1_1 connects for controlling the KL30 pin of controller 1, whether switch Relay_1_2 connects for controlling the KL15 of controller 1, and when switch Relay_1_1 is closed, the KL30 pin of controller 1 is connected, when switch Relay_1_2 is closed, the KL15 pin of controller 1 is connected, and when switch Relay_1_1 and switch Relay_1_2 while closure, in normal this test circuit of access of controller 1, carries out work.In like manner, when X is 2, whether switch Relay_2_1 and switch Relay_2_2 control controller 2 access in test circuit.When X is n, whether switch Relay_n_1 and switch Relay_n_2 control controller n and access in test circuit.
In Fig. 5, when connecting two corresponding relays of some controllers, disconnect the relay that other controllers are corresponding.Now only have the power supply of a controller to be switched on, in normal operating conditions, whole system is equivalent to carry out unit testing.For example: when only having switch Relay_1_1 and switch Relay_1_2 closed, i.e. controller 1 energising, in normal operating conditions, now, test circuit is tested controller 1.It should be noted that, although other controllers are not switched on, but the peripheral circuit of these controllers has been access in CAN network, the waveform of the tested controller 1 now gathering approaches the true waveform of real vehicle more, therefore, test result is more true, reliable, thereby is more conducive to find rapidly the problem of existence.Further, at controller 1, carry out cycle or off-line on-line monitoring etc. while needing test item that other controllers participate in, can be by disconnecting or two relays corresponding to closed other controllers make its online or off-line.For example: add while needing controller 2 online, can connect controller 2 by Closing Switch Relay_2_1 and switch Relay_2_2; When being completed while needing controller 2 to roll off the production line, cut-off switch Relay_2_1 and switch Relay_2_2, to control controller 2 power-off.
Further, when carrying out network management test, can produce local wakeup time by disconnection or switch Relay_X_2 corresponding to closing operator.Due to the disconnection of relay with closedly can conveniently obtain by programmed control the time performing an action, make test result more accurate.
When carrying out short-circuit test, can realize short circuit by the closure of programmed control the first short circuiting switch 170, the second short circuiting switch 180, the 3rd short circuiting switch 190, the 4th short circuiting switch 200 and the 5th short circuiting switch 210 and move, the mistake of having avoided manual operation to cause.
After unit testing completes, carry out system testing, when carrying out system testing, if need to investigate orientation problem, the power supply of breaking controller successively, observation test result, thus find out easily fail-safe control device.
According to the proving installation of the CAN network for testing automobile of the present utility model, can make testing apparatus articulate a plurality of controllers simultaneously, and control being connected and disconnection of a plurality of controllers and CAN bus by switch independently, thereby, can carry out unit testing and system testing to the CAN network of automobile, when unit testing, except tested controller, other controllers in CAN bus, have been connected, thereby not only can obtain the CAN bus waveform more approaching in real vehicle situation, but also can avoid the controller not powering on to cause harmful effect to the result of unit testing.In addition, when unit testing, if need other controllers to participate in communication, can simulate more really CAN bus communication situation on real vehicle by it is powered on and is accessed test environment, make test result more true, accurate.And when system testing, the power or power-down by certain or some controllers, realizes its temporarily removing from CAN network, fast and easy, the controller that searches problem accurately.In addition, this proving installation is realized the automatic operation to power switch and ignition switch by on-off controller, makes test process more safe and reliable, the generation of the situation such as misconnection while having avoided manual connect.Generally speaking, this proving installation can make test process easier, flexible and reliable, has also saved testing cost simultaneously, and test result is more true, accurate, further, has improved the security performance of complete machine.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present utility model and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is by claim and be equal to and limit.
Claims (10)
1. for a CAN bus test box for the CAN network of testing automobile, described CAN network comprises CAN bus and a plurality of controllers that are connected with described CAN bus, it is characterized in that, described CAN bus test box comprises:
Be respectively used to and anodal a plurality of power supply interfaces and a plurality of ignition switch interface being connected of power supply, described a plurality of power supply interface and described a plurality of controllers are corresponding and for being connected with described a plurality of controllers one by one, and described a plurality of ignition switch interfaces and described a plurality of controllers are corresponding and for being connected with described a plurality of controllers one by one;
A plurality of power switches and a plurality of ignition switch, described a plurality of power switch is connected correspondingly with described a plurality of power supply interfaces, described a plurality of ignition switch is connected correspondingly with described a plurality of ignition switch interfaces, and described power switch and described ignition switch are closed for controlling the controller of the described CAN bus test box of access;
Earth terminal, described earth terminal is connected with described power cathode with described a plurality of controllers, so that described a plurality of controller ground connection; And
CAN interface, described CAN interface is respectively used to be connected with described CAN bus with testing apparatus, to test accessing the controller of described CAN bus test box.
2. CAN bus test box according to claim 1, it is characterized in that, described CAN interface comprises a CAN interface and the 2nd CAN interface, and a described CAN interface is connected with the CAN_H bus of described CAN bus, and described the 2nd CAN interface is connected with the CAN_L bus of described CAN bus.
3. CAN bus test box according to claim 2, is characterized in that, also comprises:
Be arranged on the first short circuiting switch between a described CAN interface and described the 2nd CAN interface.
4. according to the CAN bus test box described in claim 2 or 3, it is characterized in that, also comprise:
Be arranged on the second short circuiting switch between a described CAN interface and described positive source.
5. according to the CAN bus test box described in claim 2 or 3, it is characterized in that, also comprise:
Be arranged on the 3rd short circuiting switch between a described CAN interface and described power cathode.
6. according to the CAN bus test box described in claim 2 or 3, it is characterized in that, also comprise:
Be arranged on the 4th short circuiting switch between described the 2nd CAN interface and described positive source.
7. CAN bus test box according to claim 6, is characterized in that, also comprises:
Be arranged on the 5th short circuiting switch between described the 2nd CAN interface and described power cathode.
8. bus test box according to claim 7, is characterized in that, described a plurality of power switches, a plurality of ignition switch, described the first short circuiting switch to the five short circuiting switches are relay.
9. CAN bus test box according to claim 8, is characterized in that, also comprises:
On-off controller, described on-off controller is connected with described a plurality of power switches, described a plurality of ignition switches, described the first short circuiting switch to the five short circuiting switches respectively, and described a plurality of power switches, described a plurality of ignition switches, described the first short circuiting switch to the five short circuiting switches are controlled by described on-off controller.
10. for a proving installation for the CAN network of testing automobile, described CAN network comprises CAN bus and a plurality of controllers that are connected with described CAN bus, it is characterized in that, described proving installation comprises:
Power supply;
Testing apparatus; And
The CAN bus test box of the CAN network for testing automobile as described in claim 1-9 any one.
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| CN201320588559.1U CN203490534U (en) | 2013-09-23 | 2013-09-23 | CAN bus test box and testing device for testing CAN network of automobile |
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Effective date of registration: 20180425 Address after: No. 188, Miyun District, Miyun District, Beijing, Beijing Patentee after: Beijing treasure Car Co., Ltd. Address before: 102206, Beijing, Shahe Town, Changping District Road, sand Yang Patentee before: Beiqi Futian Automobile Co., Ltd. |