CN111443249A - High-precision automobile load rejection test system based on network communication - Google Patents
High-precision automobile load rejection test system based on network communication Download PDFInfo
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- CN111443249A CN111443249A CN202010233738.8A CN202010233738A CN111443249A CN 111443249 A CN111443249 A CN 111443249A CN 202010233738 A CN202010233738 A CN 202010233738A CN 111443249 A CN111443249 A CN 111443249A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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Abstract
The invention discloses a high-precision automobile load rejection testing system based on network communication, which comprises: the automobile load rejection testing environment system is used for carrying out automobile load rejection testing; the vehicle-mounted network monitoring system is connected with the automobile load rejection testing environment system and is used for monitoring the vehicle-mounted bus network communication of the whole automobile; and the computer is connected with the vehicle-mounted network monitoring system and used for receiving the vehicle network signals and processing and displaying data. The high-precision automobile load rejection test system can monitor and record the vehicle communication message of the load rejection test in real time, can find the abnormal state of the vehicle and the abnormal state of the controller which can not be observed subjectively, and enables the test evaluation to be more accurate. The high-precision automobile load rejection testing system provides a basis for positioning defective electric devices of the tested automobile.
Description
Technical Field
The invention relates to a high-precision automobile load rejection testing system based on network communication, and belongs to the technical field of finished automobile testing.
Background
With the improvement of automobile technology, more and more electronic devices are used in automobiles. The vehicle-mounted controller transmits and controls information to the vehicle-mounted electric appliance to enable the vehicle-mounted electric appliance to work normally. The continuous development of automobile intellectualization, networking and automatic driving technologies, the continuous innovation of ADAS technology, the video and audio promotion of high-quality vehicle-mounted entertainment videos, the development of a series of technologies such as OTA remote upgrade, V2X, big data and cloud computing and the like promote the explosive development of the capacity requirement of a vehicle-mounted network. On the basis of the traditional bus communication mode, the vehicle-mounted Ethernet communication technology is developed. At present with increasingly powerful industrial electrification, more and more complex conditions are encountered in the running process of the automobile, for example, occasional faults and no faults of some electrical appliance systems occur, based on the situation, a load throwing test needs to be carried out in the development process of the automobile, and network communication and electrical appliance signals of the automobile are monitored in the test process so as to observe and analyze the working state of the automobile and realize quick positioning and confirmation of the problematic electrical appliance.
The automobile load rejection test comprises two steps of test implementation and test result analysis.
The existing load shedding test monitoring method comprises the following steps: in the test process, the voltage of the generator and the controller terminal is monitored by an oscilloscope or other data acquisition equipment, and the influence of the impact voltage of the load throwing on the functions of a vehicle power supply and a vehicle controller is judged by recording the instantaneous electrical parameters and waveforms of the load throwing. The monitoring cannot determine whether the network function and the network bus system work normally in the load throwing test process, and cannot determine the condition which is not shown but does not meet the test requirement. If the network generates error frames at the moment of throwing the low-voltage storage battery, the voltage fluctuation monitored by the oscilloscope and the digital acquisition equipment cannot be judged; and for example, in the process of load rejection test of an automobile, if a certain controller is influenced by instantaneous fluctuation voltage to work abnormally, the abnormal phenomenon cannot be judged by an oscilloscope and a data acquisition device.
After the load throwing test is finished, the whole vehicle network communication equipment is utilized to check the abnormal working condition in the test process, and the electric device with the problem of the whole vehicle network communication is positioned. However, the monitoring method has great hysteresis, because the abnormal phenomenon occurring in the load-throwing test process can automatically recover to be normal after the load-throwing test is finished, and some abnormal voltage even occurs in some specific moments and automatically recovers to be normal in the test process. Therefore, network communication monitoring is carried out after the load throwing test is finished, electric devices with problems may be missed or cannot be found, for example, an alarm indicator lamp which does not disappear on an instrument panel after the load throwing test is finished can find corresponding problem parts by monitoring the whole vehicle network, but if the alarm indicator lamp partly or completely disappears on the instrument panel after the load throwing test is finished, the problem parts cannot be found through network monitoring under the condition.
The existing automobile load rejection testing method does not monitor the network information of the whole automobile and has the following defects:
(1) the load throwing test does not monitor network information, some abnormal phenomena may be missed in the load throwing test, or some abnormal work of some controllers of the whole vehicle cannot be monitored, such as accidental or no fault phenomenon, so that the final load throwing test grade judgment is influenced;
(2) hysteresis exists, and part of electric devices with problems can be missed when abnormal phenomena occurring in the testing process are checked and positioned after the load throwing test is finished;
(3) time and economic cost are increased, network communication monitoring and troubleshooting and positioning of defective electric devices are needed after testing is finished, and testing needs to be conducted again for automatic recovery faults.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-precision automobile load rejection testing system based on network communication, which utilizes a network monitoring system to monitor the network communication of the whole automobile in real time and monitor the load rejection of the automobile at the same time, thereby realizing the monitoring of network error frames, abnormal work of a controller and abnormal states which do not meet the testing requirements of the automobile in the testing process.
In order to achieve the above object, the present invention provides a high-precision automobile load rejection testing system based on network communication, which comprises:
the automobile load rejection testing environment system is used for carrying out automobile load rejection testing;
the vehicle-mounted network monitoring system is connected with the automobile load rejection testing environment system and is used for monitoring the vehicle-mounted bus network communication of the whole automobile;
and the computer is connected with the vehicle-mounted network monitoring system and used for receiving the vehicle network signals and processing and displaying data.
As an improvement, the automobile load rejection testing environment system comprises a testing system, a high-sensitivity electronic switch and a tested vehicle which are sequentially connected;
the test system transmits data based on Ethernet to realize multi-channel data monitoring;
the high-sensitivity electronic switch controls the on-off of the loop through an electronic circuit.
As an improvement, the vehicle-mounted network monitoring system adopts network communication monitoring equipment.
As an improvement, software matched with the network communication monitoring equipment is installed in the computer.
As an improvement, the photoelectric conversion module is also included; the automobile load rejection testing environment system is connected with the vehicle-mounted network monitoring system through the photoelectric conversion module.
The principle of the invention is as follows: the vehicle-mounted network signal collected when the power supply loop of the storage battery is cut off is transmitted to the network communication monitoring equipment and displayed on a computer. In the whole load throwing test process, the network communication monitoring equipment is connected with a computer provided with software matched with the network monitoring equipment, and the computer is used for displaying processed data for analysis of testers and technicians.
Compared with the prior art, the invention has the beneficial effects that:
(1) the high-precision automobile load rejection test system can monitor and record the vehicle communication message of the load rejection test in real time, can find the abnormal state of the vehicle and the abnormal state of the controller which can not be observed subjectively, and enables the test evaluation to be more accurate.
(2) The high-precision automobile load rejection testing system provides a basis for positioning defective electric devices of the tested automobile.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is another schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
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, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
A high accuracy car load test system of throwing based on network communication includes:
the automobile load rejection testing environment system is used for carrying out automobile load rejection testing;
the vehicle-mounted network monitoring system is connected with the automobile load rejection testing environment system and is used for monitoring the vehicle-mounted bus network communication of the whole automobile;
and the computer is connected with the vehicle-mounted network monitoring system and used for receiving the vehicle network signals and processing and displaying data.
As an improvement of the embodiment, the automobile load rejection testing environment system comprises a testing system, a high-sensitivity electronic switch and a tested vehicle which are sequentially connected;
the test system transmits data based on the Ethernet, improves the communication rate and the bandwidth, can realize multi-channel data monitoring, has mutually independent channels, avoids crosstalk, and is matched with a high-precision sensor for use;
the high-sensitivity electronic switch controls the on-off of the loop through the electronic circuit, the cut-off speed of the loop can reach the microsecond level, and the device can be used for quickly dropping the load and simulating the most severe load dropping phenomenon.
The vehicle-mounted network monitoring system is network communication monitoring equipment which CAN simultaneously realize monitoring of communication signals such as a CAN bus, an L IN bus, a FlexRay bus, an Ethernet and the like.
In addition, if the automobile is far away from the monitoring equipment in the test process or the test environment is easy to interfere with the network, the automobile load rejection test environment system can be connected with the vehicle-mounted network monitoring system through the photoelectric conversion module. The vehicle-mounted network monitoring system is characterized in that two photoelectric conversion modules are added, a bus interface of a vehicle to be tested is connected with a first photoelectric conversion module, the first photoelectric conversion module is connected to a second photoelectric conversion module through an optical fiber, the second photoelectric conversion module is connected with network communication monitoring equipment, the network communication monitoring equipment is connected to a computer, and the purpose of adding the two photoelectric conversion modules and the optical fiber is to solve the problem that network data are easily interfered by a vehicle remote monitoring network or a testing environment.
Example 1
As shown in fig. 1, a high-precision automobile load rejection testing system based on network communication comprises an automobile load rejection testing environment system, a vehicle-mounted network monitoring system and a computer;
the automobile load rejection test environment system comprises an automobile load rejection test system, a high-sensitivity electronic switch and a tested automobile and is used for carrying out automobile load rejection test;
the vehicle-mounted network monitoring system is network communication monitoring equipment, vehicle-mounted network signals transmitted by the whole vehicle are received by the network communication monitoring equipment, and the network communication monitoring equipment sends the vehicle-mounted network signals to the computer. The computer is provided with the existing testing software matched with the network monitoring equipment and used for displaying the processed data for the analysis of testers and technicians.
Example 2
As shown in fig. 2, a high-precision automobile load rejection testing system based on network communication comprises an automobile load rejection testing environment system, a vehicle-mounted network monitoring system and a computer;
the automobile load rejection testing environment system consists of an automobile load rejection testing system, a high-sensitivity electronic switch, a tested vehicle and a first photoelectric conversion module and is used for carrying out automobile load rejection testing;
the vehicle-mounted network monitoring system comprises a second photoelectric conversion module and network communication monitoring equipment and is used for monitoring vehicle-mounted bus network communication of the whole vehicle; one end of the first photoelectric conversion module is connected with a network diagnosis interface of the tested vehicle, and the other end of the first photoelectric conversion module is connected with an optical fiber to transmit a network signal out to carry out load rejection test on the tested vehicle and is connected with a second photoelectric conversion module;
the network communication monitoring equipment is respectively connected with the second photoelectric conversion module and the computer, and sends the whole vehicle network signal transmitted by the second photoelectric conversion module to the computer, and the computer is provided with the computer of the existing test software matched with the network monitoring equipment and is used for displaying the processed data for the analysis of testers and technicians.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The utility model provides a load test system is thrown to high accuracy car based on network communication which characterized in that includes:
the automobile load rejection testing environment system is used for carrying out automobile load rejection testing;
the vehicle-mounted network monitoring system is connected with the automobile load rejection testing environment system and is used for monitoring the vehicle-mounted bus network communication of the whole automobile;
and the computer is connected with the vehicle-mounted network monitoring system and used for receiving the vehicle network signals and processing and displaying data.
2. The high-precision automobile load rejection test system based on network communication as claimed in claim 1, wherein the automobile load rejection test environment system comprises a test system, a high-sensitivity electronic switch and a tested vehicle which are connected in sequence;
the test system transmits data based on Ethernet to realize multi-channel data monitoring;
the high-sensitivity electronic switch controls the on-off of the loop through an electronic circuit.
3. The high-precision automobile load rejection testing system based on network communication as claimed in claim 2, wherein said vehicle-mounted network monitoring system employs network communication monitoring equipment.
4. The high-precision automobile load rejection testing system based on network communication as claimed in claim 3, wherein software matched with network communication monitoring equipment is installed in said computer.
5. The high-precision automobile load rejection test system based on network communication of claim 1, further comprising a photoelectric conversion module;
the automobile load rejection testing environment system is connected with the vehicle-mounted network monitoring system through the photoelectric conversion module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010233738.8A CN111443249A (en) | 2020-03-30 | 2020-03-30 | High-precision automobile load rejection test system based on network communication |
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| CN202010233738.8A CN111443249A (en) | 2020-03-30 | 2020-03-30 | High-precision automobile load rejection test system based on network communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284755A (en) * | 2020-09-29 | 2021-01-29 | 奇瑞汽车股份有限公司 | Test method for load shedding of electric appliance of whole vehicle in real vehicle environment |
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| CN203859732U (en) * | 2013-11-06 | 2014-10-01 | 苏州泰思特电子科技有限公司 | Unloading voltage simulation generator |
| CN205506972U (en) * | 2016-04-07 | 2016-08-24 | 厦门海诺达科学仪器有限公司 | Automotive electronics electromagnetic compatibility test system |
| CN207851175U (en) * | 2018-01-18 | 2018-09-11 | 中国汽车技术研究中心 | A kind of electromagnetic compatibility free field anti-interference testing network communication monitoring system |
| CN109239483A (en) * | 2018-07-30 | 2019-01-18 | 北京长城华冠汽车科技股份有限公司 | A kind of the high pressure throw load test macro and test method of electric car |
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2020
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Patent Citations (5)
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| CN102508163A (en) * | 2011-11-25 | 2012-06-20 | 中联重科股份有限公司 | Method, system and device for detecting load dump of portable generator |
| CN203859732U (en) * | 2013-11-06 | 2014-10-01 | 苏州泰思特电子科技有限公司 | Unloading voltage simulation generator |
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Application publication date: 20200724 |
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