CN113176774A - Automatic ECU (electronic control Unit) ground deviation test system and method - Google Patents
Automatic ECU (electronic control Unit) ground deviation test system and method Download PDFInfo
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- CN113176774A CN113176774A CN202110566878.1A CN202110566878A CN113176774A CN 113176774 A CN113176774 A CN 113176774A CN 202110566878 A CN202110566878 A CN 202110566878A CN 113176774 A CN113176774 A CN 113176774A
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- 238000000034 method Methods 0.000 title abstract description 15
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- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
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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
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
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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
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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Abstract
The invention relates to the field of ECU (electronic control unit) testing, and provides an automatic ECU (electronic control unit) ground deviation testing system and method, which comprise the following steps: the system comprises a PC (personal computer) end, a bus analysis unit, a power supply unit, a four-phase power supply, a tested electronic unit and a switch unit; the bus analysis unit is electrically connected with the PC end, the power supply unit and the four-phase power supply through serial ports; the tested electronic unit is electrically connected with the power supply unit and the four-phase power supply through hard wires, and the switch unit is electrically connected with the tested electronic unit and the bus analysis unit. The test system provided by the invention has the advantages of simple structure, high stability, strong reliability, good compatibility and high automation degree, can stably and reliably complete the offset test by directly using the PC end interface to output the test result, and has the characteristics of intuition, rapidness and high automation degree.
Description
Technical Field
The invention relates to the field of ECU (electronic control unit) testing, in particular to an automatic ECU ground offset testing system and method.
Background
As the electrification of new energy vehicles is accelerated, more and more new energy vehicles will use more and more vehicle ECU control units, and each ECU must be strictly tested from design to volume production. Among them, ground offset test is particularly important, and the prior art lacks effective ground offset test means.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to solve the technical problem that an effective ground offset test means is lacked in the prior art.
To achieve the above object, the present invention provides an automated ECU offset test system, comprising: the system comprises a PC (personal computer) end, a bus analysis unit, a power supply unit, a four-phase power supply, a tested electronic unit and a switch unit;
the bus analysis unit is electrically connected with the PC end, the power supply unit and the four-phase power supply through serial ports;
the tested electronic unit is electrically connected with the power supply unit and the four-phase power supply through hard wires, and the switch unit is electrically connected with the tested electronic unit and the bus analysis unit.
Preferably, the electrical connection between the bus analysis unit and the PC terminal, the power supply unit and the four-phase power supply through serial ports specifically includes:
the first interface of the bus analysis unit is electrically connected with the PC end, the fifth interface of the bus analysis unit is electrically connected with the first interface of the power supply unit, and the fourth interface of the bus analysis unit is electrically connected with the second interface of the four-phase power supply.
Preferably, the electrical connection between the electronic unit to be tested and the power supply unit and the four-phase power supply through hard wires is specifically as follows:
the second interface of the tested electronic unit is electrically connected with the KL30 interface of the power supply unit, and the third interface of the tested electronic unit is electrically connected with the KL15 interface of the power supply unit.
And the first interface of the electronic unit to be tested is electrically connected with the first interface of the four-phase power supply and the ground wire.
Preferably, the switching unit includes: a first resistor, a second resistor and a switch;
the switch unit is electrically connected with the tested electronic unit and the bus analysis unit, and specifically comprises the following steps:
the third interface of the bus analysis unit is electrically connected with one end of the first resistor, one end of the switch and the fourth interface of the tested electronic unit, the other end of the switch is electrically connected with one end of the second resistor, and the second interface of the bus analysis unit is electrically connected with the other end of the first resistor, the other end of the second resistor and the fifth interface of the tested electronic unit.
An automated ECU offset test method is realized based on the automated ECU offset test system, and comprises the following steps:
s1: starting the automatic ECU offset test system, carrying out pre-test pretreatment on the PC terminal, entering step S2 if the pre-test pretreatment is normally completed, otherwise, closing the automatic ECU offset test system and returning to step S1;
s2: the PC terminal selects the working mode of the automatic ECU deviation test system, if the first mode is selected, the step S3 is carried out, and if the second mode is selected, the step S4 is carried out;
s3: testing the communication information of the tested electronic unit in a forward ground deviation state, and storing the communication information to the PC terminal for analysis to obtain a forward ground deviation test result;
s4: and testing the communication information of the tested electronic unit under the negative deviation state, and storing the communication information to the PC terminal for analysis to obtain a negative deviation test result.
Preferably, step S1 is specifically:
s11: the PC end starts the bus analysis unit, the power supply unit and the four-phase power supply;
s12: the PC end sets configuration information of the tested electronic unit and judges whether the tested electronic unit contains a terminal resistor; if yes, controlling a switch in the switch unit to be closed; otherwise, controlling the switch in the switch unit to be switched off;
s13: the bus analysis unit controls the output voltage of the power supply unit, and the output voltage of a KL30 interface and a KL15 interface of the power supply unit are set according to the configuration information of the electronic unit to be tested;
s14: after waiting for a preset time t, if the bus analysis unit can normally and stably receive communication information, judging that the pre-processing before the test is normally completed, and entering step S2; otherwise, the automated ECU is turned off to offset the test system and returns to step S1.
Preferably, step S3 is specifically:
s31: the bus analysis unit controls the four-phase power supply to output a forward voltage V to the tested electronic unit, wherein the forward voltage V starts from 0 and is arranged at preset time intervals t1Increasing Δ V until the forward voltage V reaches a preset forward voltage V1；
S32: each time the forward voltage V increases, the bus analysis unit performs a predetermined time t1Continuously detecting communication information of the electronic unit to be detected;
s33: repeating steps S31-S32 until the forward voltage V reaches the preset forward voltage V1Then, the bus analysis unit stops detecting and transmits all the communication information to the PC end for analysis;
s34: if all the communication information is normal, judging that the forward ground deviation test result is passed, otherwise, judging that the forward ground deviation test result is not passed; and transmitting the forward ground offset test result to the PC terminal for displaying.
Preferably, step S4 is specifically:
s41: the bus analysis unit controls the four-phase power supply to output negative voltage-V to the tested electronic unit, and the negative voltage-V starts from 0 and is arranged at preset time intervals t1Decreasing Δ V until the negative voltage-V reaches a preset negative voltage-V2；
S42: each time the negative voltage-V is reduced, the bus analysis unit is in a preset time t1Continuously detecting communication information of the electronic unit to be detected;
s43: repeating the steps S41-S42 until the negative voltage-V reaches the preset negative voltage-V2Then, the bus analysis unit stops detecting and transmits all the communication information to the PC end for analysis;
s34: if all the communication information is normal, judging that the negative deviation test result is passed, otherwise, judging that the negative deviation test result is not passed; and transmitting the negatively-biased test result to the PC terminal for displaying.
The invention has the following beneficial effects:
the test system has the advantages of simple structure, high stability, strong reliability, good compatibility and high automation degree, can stably and reliably complete the offset test by directly using the PC end interface to output the test result, and has the characteristics of intuition, rapidness and high automation degree.
Drawings
FIG. 1 is a system block diagram of an embodiment of the present invention;
FIG. 2 is a flow chart of a method of an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, an automated ECU offset test system includes: the system comprises a PC (personal computer) end 1, a bus analysis unit 3, a power supply unit 2, a four-phase power supply 5, a tested electronic unit 4 and a switch unit;
the bus analysis unit 3 is electrically connected with the PC end 1, the power supply unit 2 and the four-phase power supply 5 through serial ports;
the electronic unit 4 to be tested is electrically connected with the power supply unit 2 and the four-phase power supply 5 through hard wires, and the switch unit is electrically connected with the electronic unit 4 to be tested and the bus analysis unit 3.
In this embodiment, the electrical connection between the bus analysis unit 3 and the PC terminal 1, the power supply unit 2, and the four-phase power supply 5 through the serial port is specifically as follows:
the first interface 31 of the bus analysis unit 3 is electrically connected to the PC terminal 1, the fifth interface 35 of the bus analysis unit 3 is electrically connected to the first interface 21 of the power supply unit 2, and the fourth interface 34 of the bus analysis unit 3 is electrically connected to the second interface 52 of the four-phase power supply 5.
In this embodiment, the electrical connection between the electronic unit 4 to be tested and the power unit 2 and the four-phase power supply 5 through hard wires is specifically as follows:
the second interface 42 of the electronic unit 4 to be tested is electrically connected to the KL30 interface of the power supply unit 2, and the third interface 43 of the electronic unit 4 to be tested is electrically connected to the KL15 interface of the power supply unit 2.
The first interface 41 of the electronic unit 4 to be tested is electrically connected with the first interface 51 of the four-phase power supply 5 and the ground wire 6.
In this embodiment, the switch unit includes: a first resistor 7, a second resistor 8 and a switch 9;
the electrical connection between the switch unit and the tested electronic unit 4 and the bus analysis unit 3 is specifically as follows:
the third interface 33 of the bus analysis unit 3 is electrically connected to one end of the first resistor 7, one end of the switch 9 and the fourth interface 44 of the electronic unit under test 4, the other end of the switch 9 is electrically connected to one end of the second resistor 8, and the second interface 32 of the bus analysis unit 3 is electrically connected to the other end of the first resistor 7, the other end of the second resistor 8 and the fifth interface 45 of the electronic unit under test 4;
in specific implementation, the first resistor 7 is a designed terminal resistor, the second resistor 8 is an external lead-in terminal resistor, the resistance values of the first resistor 7 and the second resistor 8 are both 120 ohms, and the switch 9 is an external terminal lead-in switch.
Referring to fig. 2, the present invention provides an automated ECU offset test method, which is implemented based on the automated ECU offset test system, and includes the following steps:
s1: starting the automatic ECU offset test system, carrying out pre-test pretreatment by the PC terminal 1, if the pre-test pretreatment is normally completed, entering the step S2, otherwise, closing the automatic ECU offset test system and returning to the step S1;
s2: the PC terminal 1 selects a working mode of the automated ECU based offset test system, and if the first mode is selected, the process proceeds to step S3, and if the second mode is selected, the process proceeds to step S4;
s3: testing the communication information of the tested electronic unit 4 in a forward ground offset state, and storing the communication information to the PC terminal 1 for analysis to obtain a forward ground offset test result;
s4: and testing the communication information of the tested electronic unit 4 in a negative deviation state, and storing the communication information to the PC end 1 for analysis to obtain a negative deviation test result.
In this embodiment, step S1 specifically includes:
s11: the PC end 1 starts the bus analysis unit 3, the power supply unit 2 and the four-phase power supply 5;
s12: the PC end 1 sets configuration information of the electronic unit 4 to be tested and judges whether the electronic unit 4 to be tested contains a terminal resistor; if yes, controlling a switch 9 in the switch unit to be closed; otherwise, controlling the switch 9 in the switch unit to be switched off;
s13: the bus analysis unit 3 controls the output voltage of the power supply unit 2, and sets the output voltage of the KL30 interface and the KL15 interface of the power supply unit 2 according to the configuration information of the electronic unit 4 to be tested;
s14: after waiting for a preset time t, if the bus analysis unit 3 can normally and stably receive communication information, it is determined that the pre-processing before the test is normally completed, and the process proceeds to step S2; otherwise, the automated ECU is shut down and the offset test system returns to step S1; in a specific implementation, the preset time t is set to 5S.
In this embodiment, step S3 specifically includes:
s31: the bus analysis unit 3 controls the four-phase power supply 5 to output a forward voltage V to the tested electronic unit 4, wherein the forward voltage V starts from 0 and is set at preset time intervals t1Increasing Δ V until the forward voltage V reaches a preset forward voltage V1；
S32: each time the forward voltage V increases, the bus analysis unit 3 performs a predetermined time t1Continuously detecting the communication information of the tested electronic unit 4;
s33: repeating steps S31-S32 until the forward voltage V reaches the preset forward voltage V1Then, the bus analysis unit 3 stops detecting and transmits all the communication information to the PC terminal 1 for analysis;
s34: if all the communication information is normal, judging that the forward ground deviation test result is passed, otherwise, judging that the forward ground deviation test result is not passed; transmitting the positive ground offset test result to the PC terminal 1 for displaying;
in a specific implementation, the time t is preset1Set to 10S, voltage increment Δ V set to 0.1V, preset forward voltage V1Set to + 2V.
In this embodiment, step S4 specifically includes:
s41: the bus analysis unit 3 controls the four-phase power supply 5 to output a negative voltage-V to the tested electronic unit 4, wherein the negative voltage-V starts from 0 and is every preset time t1Decreasing Δ V until the negative voltage-V reaches a preset negative voltage-V2；
S42: each time the negative voltage-V is reduced, the bus analysis unit 3 is in a preset time t1Continuously detecting the communication information of the tested electronic unit 4;
s43: repeating the steps S41-S42 until the negative voltage-V reaches the preset negative voltage-V2Then, the bus analysis unit 3 stops detecting and transmits all the communication information to the PC terminal 1 for analysis;
s44: if all the communication information is normal, judging that the negative deviation test result is passed, otherwise, judging that the negative deviation test result is not passed; transmitting the negatively biased test result to the PC terminal 1 for display;
in a specific implementation, a negative voltage-V is preset2Set to-2V.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third and the like do not denote any order, but rather the words first, second and the like may be interpreted as indicating any order.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. An automated ECU-based offset testing system, comprising: the system comprises a PC (personal computer) end (1), a bus analysis unit (3), a power supply unit (2), a four-phase power supply (5), a tested electronic unit (4) and a switch unit;
the bus analysis unit (3) is electrically connected with the PC end (1), the power supply unit (2) and the four-phase power supply (5) through serial ports;
the electronic unit (4) to be tested is electrically connected with the power supply unit (2) and the four-phase power supply (5) through hard wires, and the switch unit is electrically connected with the electronic unit (4) to be tested and the bus analysis unit (3).
2. The automated ECU-based offset testing system according to claim 1, wherein the bus analysis unit (3) is electrically connected to the PC terminal (1), the power supply unit (2) and the four-phase power supply (5) through serial ports, and specifically comprises:
the first interface (31) of the bus analysis unit (3) is electrically connected with the PC end (1), the fifth interface (35) of the bus analysis unit (3) is electrically connected with the first interface (21) of the power supply unit (2), and the fourth interface (34) of the bus analysis unit (3) is electrically connected with the second interface (52) of the four-phase power supply (5).
3. Automated ECU-based offset testing system according to claim 1, characterized in that the electronic unit under test (4) is electrically connected to the power supply unit (2) and the four-phase power supply (5) by hard wires, in particular:
the second interface (42) of the tested electronic unit (4) is electrically connected with the KL30 interface of the power supply unit (2), and the third interface (43) of the tested electronic unit (4) is electrically connected with the KL15 interface of the power supply unit (2).
The first interface (41) of the electronic unit (4) to be tested is electrically connected with the first interface (51) of the four-phase power supply (5) and the ground wire (6).
4. The automated ECU-based excursion test system of claim 1, wherein said switching unit comprises: a first resistor (7), a second resistor (8) and a switch (9);
the switch unit is electrically connected with the tested electronic unit (4) and the bus analysis unit (3) specifically as follows:
the third interface (33) of the bus analysis unit (3) is electrically connected with one end of the first resistor (7), one end of the switch (9) and the fourth interface (44) of the tested electronic unit (4), the other end of the switch (9) is electrically connected with one end of the second resistor (8), and the second interface (32) of the bus analysis unit (3) is electrically connected with the other end of the first resistor (7), the other end of the second resistor (8) and the fifth interface (45) of the tested electronic unit (4).
5. An automated ECU-based excursion test method implemented based on the automated ECU-based excursion test system according to any one of claims 1-4, characterized by comprising the steps of:
s1: starting the automatic ECU offset test system, carrying out pretreatment before test by the PC terminal (1), if the pretreatment before test is normally finished, entering step S2, otherwise, closing the automatic ECU offset test system and returning to step S1;
s2: the PC terminal (1) selects the working mode of the automatic ECU deviation test system, if the first mode is selected, the step S3 is entered, and if the second mode is selected, the step S4 is entered;
s3: testing the communication information of the tested electronic unit (4) in a forward deviation state, and storing the communication information to the PC (1) for analysis to obtain a forward deviation test result;
s4: and testing the communication information of the tested electronic unit (4) in a negative deviation state, and storing the communication information to the PC (1) for analysis to obtain a negative deviation test result.
6. The automated ECU-based offset testing method according to claim 5, wherein the step S1 is specifically as follows:
s11: the PC end (1) starts the bus analysis unit (3), the power supply unit (2) and the four-phase power supply (5);
s12: the PC end (1) is used for setting configuration information of the electronic unit (4) to be tested and judging whether the electronic unit (4) to be tested contains a terminal resistor or not; if yes, controlling a switch (9) in the switch unit to be closed; otherwise, controlling a switch (9) in the switch unit to be switched off;
s13: the bus analysis unit (3) controls the output voltage of the power supply unit (2), and the output voltage of the KL30 interface and the KL15 interface of the power supply unit (2) are set through the configuration information of the electronic unit (4) to be detected;
s14: after waiting for a preset time t, if the bus analysis unit (3) can normally and stably receive the communication information, judging that the pre-processing before the test is normally completed, and entering step S2; otherwise, the automated ECU is turned off to offset the test system and returns to step S1.
7. The automated ECU-based offset testing method according to claim 5, wherein the step S3 is specifically as follows:
s31: the bus analysis unit (3) controls the four-phase power supply (5) to output a forward voltage V to the electronic unit (4) to be detected, and the forward voltage V starts from 0 and is arranged at preset time intervals t1Increasing Δ V until the forward voltage V reaches a preset forward voltage V1；
S32: each time the forward voltage V increases, the bus analysis unit (3) performs a predetermined time t1Continuously detecting communication information of the electronic unit (4) to be detected;
s33: repeating steps S31-S32 until the forward voltage V reaches the preset forward voltage V1Then, the bus analysis unit (3) stops detecting and transmits all the communication information to the PC end (1) for analysis;
s34: if all the communication information is normal, judging that the forward ground deviation test result is passed, otherwise, judging that the forward ground deviation test result is not passed; and transmitting the positive ground deviation test result to the PC terminal (1) for displaying.
8. The automated ECU-based offset testing method according to claim 5, wherein the step S4 is specifically as follows:
s41: the bus analysis unit (3) controls the four-phase power supply (5) to output negative voltage-V to the electronic unit (4) to be detected, and the negative voltage-V starts from 0 and is every preset time t1Decreasing Δ V until the negative voltage-V reaches a preset negative voltage-V2；
S42: each time the negative voltage-V is reduced, the bus analysis unit (3) is operated for a predetermined time t1Continuously detecting communication information of the electronic unit (4) to be detected;
s43: repeating the steps S41-S42 until the negative voltage-V reaches the preset negative voltage-V2Then, the bus analysis unit (3) stops detectingAll the communication information is transmitted to the PC terminal (1) for analysis;
s44: if all the communication information is normal, judging that the negative deviation test result is passed, otherwise, judging that the negative deviation test result is not passed; and transmitting the negatively-biased test result to the PC terminal (1) for displaying.
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| CN202110566878.1A CN113176774A (en) | 2021-05-24 | 2021-05-24 | Automatic ECU (electronic control Unit) ground deviation test system and method |
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| CN103728968A (en) * | 2013-12-16 | 2014-04-16 | 东风柳州汽车有限公司 | Automatic test system for CAN network and ECU functions |
| CN206147333U (en) * | 2016-10-16 | 2017-05-03 | 华晨汽车集团控股有限公司 | Whole car function is tried on clothes from dynamic testing and is put based on CAN card |
| CN111694337A (en) * | 2019-03-14 | 2020-09-22 | 上海锐勤电子科技有限公司 | ECU network automatic test system |
| CN215117260U (en) * | 2021-05-24 | 2021-12-10 | 黄冈格罗夫氢能汽车有限公司 | Automatic ECU (electronic control Unit) ground deviation test system |
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2021
- 2021-05-24 CN CN202110566878.1A patent/CN113176774A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103728968A (en) * | 2013-12-16 | 2014-04-16 | 东风柳州汽车有限公司 | Automatic test system for CAN network and ECU functions |
| CN206147333U (en) * | 2016-10-16 | 2017-05-03 | 华晨汽车集团控股有限公司 | Whole car function is tried on clothes from dynamic testing and is put based on CAN card |
| CN111694337A (en) * | 2019-03-14 | 2020-09-22 | 上海锐勤电子科技有限公司 | ECU network automatic test system |
| CN215117260U (en) * | 2021-05-24 | 2021-12-10 | 黄冈格罗夫氢能汽车有限公司 | Automatic ECU (electronic control Unit) ground deviation test system |
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