CN114815772A - Fault injection automatic test system based on HIL platform - Google Patents
Fault injection automatic test system based on HIL platform Download PDFInfo
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- CN114815772A CN114815772A CN202210318285.8A CN202210318285A CN114815772A CN 114815772 A CN114815772 A CN 114815772A CN 202210318285 A CN202210318285 A CN 202210318285A CN 114815772 A CN114815772 A CN 114815772A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0262—Confirmation of fault detection, e.g. extra checks to confirm that a failure has indeed occurred
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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Abstract
The invention provides a fault injection automatic test system based on an HIL platform, which comprises a simulation module, a control module and a creation module: the simulation module is used for simulating and generating various fault signals so that the control module can implement automatic test according to the fault information; the control module is used for sending a control signal to the simulation module, receiving a fault signal and controlling the corresponding tested sample to implement automatic test according to the fault signal; the creating module is used for creating an interface definition table of various signals so that the control module calls corresponding interfaces according to the interface definition table. The invention has short manufacturing period and low cost on the basis of meeting the test requirement by arranging the fault injection box; and by arranging an automatic control system, the fault triggering is completely controlled by the running of a script compiled by an upper computer, and the on-off test of signals, the short circuit of the ground and the power supply and the short circuit of the signals are not needed in a manual mode.
Description
Technical Field
The invention relates to the technical field of automobile automatic testing, in particular to a fault injection automatic testing system based on an HIL platform.
Background
With the rapid development of the automobile industry and the improvement of the living standard of people, automobiles become one of the transportation tools essential for people to live and travel, and aiming at the diagnosis requirement specification, all electric control units are definitely required to continuously perform fault self-detection in fault management so as to monitor abnormal events in a function running state, including the open circuit or short circuit condition of input/output lines.
In an HIL automatic test system, the fault of a controlled object part is required to be injected in real time, and the response of an ECU (electronic control Unit) of a module after the fault is detected; generally, a certain number of FIU fault injection modules are configured in the HIL automated test cabinet to meet the fault test requirement. However, in the case of testing some input/output PIN PINs, for example, when a plurality of ECU modules are tested, or when the test requirement needs to be increased in an already completed test system, the fault injection system configured in the HIL cabinet may be insufficient in the number of fault injections.
Disclosure of Invention
Based on this, the invention aims to provide a fault injection automatic test system based on a HIL platform, so as to at least solve the defects in the technology.
The invention provides a fault injection automatic test system based on an HIL platform, which comprises a simulation module, a control module and a creation module:
the simulation module is used for simulating and generating various fault signals so that the control module can implement automatic test according to the fault information;
the control module is used for sending a control signal to the simulation module, receiving the fault signal and controlling the corresponding tested sample to implement automatic test according to the fault signal;
the creating module is used for creating an interface definition table of various signals so that the control module calls a corresponding interface according to the interface definition table.
Furthermore, the control module comprises an HIL platform and a relay assembly, one end of a control end of the relay assembly is connected with a direct-current power supply, the other end of the control end of the relay assembly is connected with the HIL platform, and the HIL platform controls the attraction of the relay assembly through outputting a first control signal.
Further, the HIL platform includes HIL host computer and HIL rack, the one end of HIL host computer with the HIL rack is connected, and the other end is connected with the sample ECU that is surveyed, the HIL host computer is used for acquireing the operation information of the sample ECU that is surveyed that is transmitted by the sample ECU that is surveyed.
Furthermore, the control module further comprises a fault injection box, a control signal interface and an input/output interface are arranged on the fault injection box, one end of the fault injection box is connected with the HIL cabinet through the control signal interface, the other end of the fault injection box is connected with the tested sample ECU, and the fault injection box is correspondingly connected with the input/output end of the tested sample through the input/output interface.
Further, still be provided with power and power ground connection interface on the trouble injection case, the power is used for each module power supply still be equipped with internal circuit in the trouble injection case, work as the HIL rack sends the second control signal, analog module according to the corresponding analog signal of second control signal generation, the trouble injection case is according to analog signal control internal circuit simulates out corresponding trouble circuit, so that the measured sample piece ECU basis the trouble circuit carries out the trouble self-checking to the measured sample piece.
Furthermore, the control module further comprises an actuator, one end of the actuator is connected with the tested sample ECU, and the other end of the actuator is connected with the tested sample.
Further, the simulation module at least includes a first simulation unit, a second simulation unit, a third simulation unit and a fourth simulation unit:
the first simulation unit is used for simulating and generating an open circuit fault signal according to the control signal sent by the HIL cabinet;
the second simulation unit is used for simulating and generating a ground short circuit fault signal according to the control signal sent by the HIL cabinet;
the third simulation unit is used for simulating and generating a power supply short-circuit fault signal according to the control signal sent by the HIL cabinet;
and the fourth simulation unit is used for simulating and generating a signal short-circuit fault signal according to the control signal sent by the HIL cabinet.
Further, the interface definition table includes a control signal interface definition table, and the control signal interface definition table is used for defining open circuit, short circuit to ground, short circuit to power supply, and short circuit to signal.
Further, the interface definition table further includes a main circuit signal interface definition table, where the main circuit interface definition table is used to define corresponding signal names.
Furthermore, pin information of the fault injection box, control signal pin information of the HIL cabinet and input/output port pin information of the tested sample piece are also arranged in the control signal interface definition table.
According to the fault injection automatic test system based on the HIL platform, various fault signals are generated through simulation of the simulation module, so that the control module controls the corresponding tested sample to implement automatic test according to the fault signals, and the fault injection automatic test system is further ensured to meet test requirements; in addition, the control module can control the corresponding tested sample to implement automatic testing according to various fault signals, so that the allocation of resources is ensured, and the automatic control mode does not need to carry out on-off testing on the signals in a manual mode, short circuit on the ground and a power supply and short circuit between the signals. The BOB junction box is prevented from being manually operated by personnel, each path is manually operated, particularly, some signal tests require repeated tests for dozens of times, some signal tests require fixed test sequences, and complicated manual operation often causes that the operation and test personnel do not execute the test sequences according to the requirements or the tests do not reach the test requirements.
Drawings
FIG. 1 is a block diagram of an HIL platform-based fault injection automation test system according to an embodiment of the present invention;
FIG. 2 is a block diagram of a simulation module according to an embodiment of the present invention;
FIG. 3 is a block diagram of a control module according to an embodiment of the present invention;
FIG. 4 is a block diagram of the HIL platform according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a fault injection tank in an embodiment of the present invention;
fig. 6 is an internal circuit diagram of a fault injection tank in an embodiment of the present invention.
Description of the main element symbols:
the following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
First, it should be noted that, the present application provides an HIL platform-based fault injection automated test system, in order to solve the problem that when a number of input/output PINs are tested, for example, when a plurality of ECU modules are tested, or when a test requirement needs to be increased in a completed test system, a fault injection system configured in an HIL cabinet may be insufficient in the number of fault injection channels, and more fault injection channels are needed.
Referring to fig. 1 to 5, an HIL platform 21-based fault injection automation test system according to an embodiment of the present invention is shown, where the system includes a simulation module 10, a control module 20, and a creation module 30:
the simulation module 10 is used for simulating and generating various fault signals so that the control module 20 can implement automatic tests according to the fault information;
the control module 20 is configured to send a control signal to the simulation module 10, receive the fault signal, and control the corresponding sample to be tested 50 to perform an automatic test according to the fault signal;
the creating module 30 is configured to create an interface definition table of each type of signal, so that the control module 20 calls a corresponding interface according to the interface definition table.
Specifically, the control module 20 includes an HIL platform 21 and a relay assembly 22, one end of a control end of the relay assembly 22 is connected to a direct current power supply, the other end of the control end is connected to the HIL platform 21, and the HIL platform 21 controls the attraction of the relay assembly 22 by outputting a first control signal.
It is understood that the control signal of the relay assembly 22 is output and controlled by the HIL platform 21, and the relay assembly 22 controls one end to be connected to a 12V dc power supply, in other embodiments, the voltage of the dc power supply is determined by the voltage requirements of the sample 50 to be tested and each module; the control terminal of the relay assembly 22 can also adopt high-level control; it is also possible to use only one relay assembly 22 for ground and power shorts IN the fault injection box 23, respectively, with the ground and 12V power supplies of each of the IN/OUT main circuits being shared, respectively, rather than having the incoming ground and power lines of the KV3, KV4 circuits IN each of the IN/OUT main circuits.
One end of the control end of the relay assembly 22 is connected to the HIL platform 21, the HIL platform 21 controls the attraction of the relay assembly 22 by outputting one ground control signal, and the fault injection requirement can be met through the combination of the relay assembly 22.
Further, the HIL platform 21 includes an HIL upper computer 211 and an HIL cabinet 212, one end of the HIL upper computer 211 is connected to the HIL cabinet 212, and the other end is connected to a sample ECU40 to be measured, and the HIL upper computer 211 is configured to obtain operation information of the sample 50 to be measured, which is transmitted by the sample ECU 40.
In this application, control module 20 still includes trouble injection case 23, be provided with control signal interface and input/output interface on the trouble injection case 23, the one end of trouble injection case 23 is passed through the control signal interface with HIL rack 212 is connected, the other end with it is connected to be surveyed sample piece ECU40, trouble injection case 23 passes through the input/output interface with it corresponds the connection to be surveyed the input/output end of sample piece 50.
It can be understood that the controller of the HIL upper computer 211 controls the HIL cabinet 212 to send a low-level control signal to the fault injection box 23 according to the programmed script program, and drives the internal circuit of the fault injection box 23, so as to simulate faults such as open circuit, short circuit to ground, short circuit to 12V power supply, short circuit between signals, and the like. The tested sample ECU40 continuously carries out fault self-detection, when a fault is sent, the tested sample ECU40 should send out a corresponding fault diagnosis DTC, the DTC sent out by the tested sample ECU40 is read through the HIL upper computer 211 and is compared with a preset DTC in an HIL script program, when the preset DTC is consistent with the fault diagnosis DTC, the test is passed, otherwise, the test is not passed.
Specifically, still be provided with power and power ground connection interface on the trouble injection case 23, the power is used for each module power supply still be equipped with internal circuit in the trouble injection case 23, work as HIL rack 212 sends the second control signal, analog module 10 is according to the corresponding analog signal of second control signal generation, trouble injection case 23 is according to analog signal control corresponding fault circuit is simulated to the internal circuit, so that the measured sample piece ECU40 is according to the fault circuit is to the measured sample piece 50 carries out the trouble self-checking.
Further, the control module 20 further comprises an actuator 24, wherein one end of the actuator 24 is connected to the sample ECU40 to be measured, and the other end is connected to the sample 50 to be measured.
It is understood that the fault injection box 23 includes an input signal IN interface of the sample under test 50, an output signal OUT interface of the sample under test 50, a control signal JX interface, a 12V power interface, a 0V power interface, and fault injection internal circuits. The input signal port of the tested sample 50 is connected with a hard wire which is output to the actuator 24 by the tested sample ECU 40; the output signal port of the tested sample 50 is connected with the actuator 24; the JX port of the control signal is connected with the HIL cabinet 212, and the signal of the HIL cabinet 212 is received to trigger corresponding fault information; the +12V port is connected with 12V constant power, and 0V is grounded.
In this application, the simulation module 10 includes a first simulation unit 11, a second simulation unit 12, a third simulation unit 13, and a fourth simulation unit 14, where the first simulation unit 11 is configured to generate an open fault signal according to a simulation of a control signal sent by the HIL cabinet 212; the second simulation unit 12 is configured to simulate generation of a ground short fault signal according to a control signal sent by the HIL cabinet 212; the third simulation unit 13 is configured to generate a power supply short-circuit fault signal according to the control signal sent by the HIL cabinet 212; the fourth simulation unit 14 is configured to generate a short-circuit fault signal according to the control signal sent by the HIL cabinet 212.
It is understood that, in order to achieve the same effect of the FIU fault injection board, the simulation module 10 can simulate an open circuit signal, a ground short circuit signal, a power short circuit signal and a short circuit signal between the two signals according to the control signal, and in other embodiments, other fault signals of the vehicle can be simulated in the simulation module 10.
In the embodiment, the simulation module 10 and the fault injection box 23 are arranged to replace an FIU fault injection plate, and the fault injection box 23 has short manufacturing period and low cost on the basis of meeting the test requirement; and through setting up automated control system for the fault trigger is controlled by the script operation that host computer compiled completely, does not need manual mode to go on to the signal, opens circuit test, to ground, to the power short circuit, short circuit between the signal. The BOB junction box is prevented from being manually operated by personnel, each path is manually operated, particularly, some signal tests require repeated tests for dozens of times, and some signal tests require fixed test sequences. The tedious manual operation often causes that the operation tester does not execute the test sequence according to the requirement or the test does not reach the test requirement times.
It should be noted that, in the present application, the interface definition table includes a control signal interface definition table and a main circuit signal interface definition table, where the control signal interface definition table is used to define an open circuit, a short circuit to ground, a short circuit to power supply, and a short circuit to signal, and the main circuit interface definition table is used to define a corresponding signal name; the control signal interface definition table is further provided with pin information of the fault injection box 23, control signal pin information of the HIL cabinet 212, and pin information of an input/output port of the sample 50 to be tested.
It should be understood that, referring to table 1, a control signal interface definition table in the present embodiment is shown, and for convenience of wire understanding and archiving, an interface definition table is developed, where the interface definition table defines two types of signals, one type is a control signal, and the other type is a main circuit signal. The control signals are placed in the column direction to define four types of open circuit, short circuit to the ground, short circuit to 12v electricity and short circuit between signals, and the main circuit is placed transversely to define the name of the object signal needing to be operated.
TABLE 1
As shown in fig. 6, a specific implementation flow of the fault injection automation test system based on the HIL platform in the present application is as follows:
the main circuit at KV1 is connected to a normally closed contact, so that the input IN and the output OUT are normally conductive. When the circuit breaking fault needs to be simulated, a low-level signal needs to be sent to the KV1 relay through a J1_1 channel, a relay switching circuit is triggered, and a normally closed circuit is changed into a normally open circuit. IN this fault mode, the input IN and the output OUT are disconnected, completing the triggering of the open circuit fault.
The main circuit at KV1 is connected to normally closed contact, so normally, the input IN and output OUT are conducted. The main circuit at KV2 is connected with a normally open contact, one end of the main circuit at KV2 is connected with the interface circuit at OUT, and the other end is connected with GND; when the ground short circuit fault needs to be simulated, a low-level signal needs to be sent to the KV2 relay through the J1_2 channel, the KV2 relay switching circuit is triggered, and the normally open circuit is changed into the normally closed circuit. IN the fault mode, the GND introduced by the KV2 relay is short-circuited with an IN circuit, and the triggering of the short-circuit fault to the GND ground is completed.
And the main circuit at KV1 is connected with a normally closed contact, so that the input IN and the output OUT are conducted under normal conditions. The main circuit at KV3 is connected with a normally open contact, one end of the main circuit at KV3 is connected with the interface circuit at OUT, and the other end is connected with +12V direct current; when the short-circuit fault of the power supply needs to be simulated, a low-level signal needs to be sent to the KV3 relay through the J1_3 channel, the KV3 relay switching circuit is triggered, and the normally open circuit is changed into the normally closed circuit. Under the fault mode, the +12V direct current introduced by the KV3 relay is short-circuited with an IN circuit, and the short-circuit fault of the +12V power supply is triggered.
And fourthly, when the short-circuit fault between the two lines is simulated, the two lines are required to be connected into a fault injection box and respectively correspond to a group of circuits in the figure 6. One group of the methods comprises: the main circuit at KV1 is connected with a normally closed contact, so that under normal conditions, the input IN and the output OUT are conducted; the main circuit at KV4 is connected with a normally open contact, one end of the main circuit at KV4 is connected with the interface circuit at OUT, and the other end is connected with the com end; the J1_4 channel provides a low level signal to the KV4 relay to trigger the KV4 relay switching circuit, and the normally open circuit is switched to the normally closed circuit. The Com port is IN conduction with the IN circuit. The other group of triggers is the same as the previous group, so that the Com port is conducted with the IN circuit, and as the Com port is shared, two lines are short-circuited, and a short-circuit fault between the two lines is triggered.
In summary, in the fault injection automatic test system based on the HIL platform in this embodiment, various fault signals are generated through simulation by the simulation module, so that the control module controls the corresponding tested sample to implement automatic test according to the fault signals, thereby ensuring that the fault injection automatic test system meets the test requirements; in addition, the control module can control the corresponding tested sample to implement automatic testing according to various fault signals, so that the allocation of resources is ensured, and the automatic control mode does not need to carry out on-off testing on the signals in a manual mode, and short circuit between the signals, namely, the ground and the power supply. The BOB junction box is prevented from being manually operated by personnel, each path is manually operated, particularly, some signal tests require repeated tests for dozens of times, some signal tests require fixed test sequences, and complicated manual operation often causes that the operation and test personnel do not execute the test sequences according to the requirements or the tests do not reach the test requirements.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The fault injection automatic test system based on the HIL platform is characterized by comprising a simulation module, a control module and a creation module:
the simulation module is used for simulating and generating various fault signals so that the control module can implement automatic test according to the fault information;
the control module is used for sending a control signal to the simulation module, receiving the fault signal and controlling the corresponding tested sample to implement automatic test according to the fault signal;
the creating module is used for creating an interface definition table of various signals so that the control module calls a corresponding interface according to the interface definition table.
2. The fault injection automatic test system based on the HIL platform as claimed in claim 1, wherein the control module comprises the HIL platform and a relay assembly, one end of a control end of the relay assembly is connected to a direct current power supply, the other end of the control end of the relay assembly is connected to the HIL platform, and the HIL platform controls the pull-in of the relay assembly by outputting a first control signal.
3. The fault injection automatic test system based on the HIL platform as claimed in claim 2, wherein the HIL platform comprises an HIL upper computer and an HIL cabinet, one end of the HIL upper computer is connected with the HIL cabinet, the other end of the HIL upper computer is connected with the tested sample ECU, and the HIL upper computer is used for acquiring the running information of the tested sample transmitted by the tested sample ECU.
4. The HIL platform-based fault injection automation testing system according to claim 3, wherein the control module further comprises a fault injection box, the fault injection box is provided with a control signal interface and an input/output interface, one end of the fault injection box is connected with the HIL cabinet through the control signal interface, the other end of the fault injection box is connected with the tested sample ECU, and the fault injection box is correspondingly connected with the input/output end of the tested sample through the input/output interface.
5. The fault injection automation test system based on the HIL platform of claim 4, wherein the fault injection box is further provided with a power supply and a power ground interface, the power supply is configured to supply power to each module, the fault injection box is further provided with an internal circuit, when the HIL cabinet sends a second control signal, the simulation module generates a corresponding analog signal according to the second control signal, and the fault injection box controls the internal circuit to simulate a corresponding fault circuit according to the analog signal, so that the tested sample ECU performs fault self-detection on the tested sample according to the fault circuit.
6. The fault injection automation test system based on the HIL platform as claimed in claim 5, wherein the control module further comprises an actuator, one end of the actuator is connected with the ECU of the tested sample, and the other end is connected with the tested sample.
7. The HIL platform based fault injection automation test system according to claim 5, wherein the simulation module includes at least a first simulation unit, a second simulation unit, a third simulation unit, and a fourth simulation unit:
the first simulation unit is used for simulating and generating an open circuit fault signal according to the control signal sent by the HIL cabinet;
the second simulation unit is used for simulating and generating a ground short circuit fault signal according to the control signal sent by the HIL cabinet;
the third simulation unit is used for simulating and generating a power supply short-circuit fault signal according to the control signal sent by the HIL cabinet;
and the fourth simulation unit is used for simulating and generating a signal short-circuit fault signal according to the control signal sent by the HIL cabinet.
8. The HIL platform based fault injection automation test system according to claim 1, wherein the interface definition table includes a control signal interface definition table for defining open circuits, short circuits to ground, short circuits to power supply, and short circuits to signal.
9. The HIL platform based fault injection automation test system of claim 8, wherein the interface definition table further includes a master circuit signal interface definition table for defining corresponding signal names.
10. The fault injection automation test system based on the HIL platform of claim 8, wherein the control signal interface definition table further includes pin information of the fault injection box, control signal pin information of the HIL cabinet, and pin information of an input/output port of a sample to be tested.
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