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A signal analysis method for quickly locating CAN signal by using diagnostic signal

An analysis method and signal technology, applied in general control systems, instruments, test/monitoring control systems, etc., can solve problems such as low signal frequency, affecting normal operation of vehicles, and normal communication interference of diagnostic messages, so as to reduce interference and shorten Analysis cycle, the effect of reducing communication interference

Active Publication Date: 2019-05-07
中汽院新能源科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The frequency of the diagnostic request signal is not only low, but the diagnostic message it sends may interfere with the normal communication of the bus to a certain extent, and even affect the normal operation of the vehicle in some cases.

Method used

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  • A signal analysis method for quickly locating CAN signal by using diagnostic signal
  • A signal analysis method for quickly locating CAN signal by using diagnostic signal
  • A signal analysis method for quickly locating CAN signal by using diagnostic signal

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Embodiment Construction

[0032] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention.

[0033] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can be mechanically connected or electrically connected, or two The internal communication of the elements may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms can be understood acc...

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Abstract

The invention provides a signal resolution method for quickly positioning a CAN signal by utilizing a diagnosis signal. The method comprises the following steps: connecting a diagnostic apparatus to a benchmark vehicle diagnosis interface, carrying out diagnosis request on a benchmark vehicle and recording a diagnosis signal; adopting CAN signal acquisition hardware to connect with a communication CAN line to read communication CAN data, adopting CAN signal acquisition software to display the communication CAN data and recording the CAN data; carrying out format conversion on the recorded diagnosis signal and the CAN data; determining effective identification zones of all CAN signals in the diagnosis signal and the CAN data, and calculating similarity of the effective identification zones; and outputting the similarity of the effective identification zones and the CAN signals in the form of a matrix, and carrying out verification on the CAN signals in the matrix according to the sequence of the similarity of the effective identification zones from high to low, and finishing positioning of the CAN signals. The method is simple to operate, high in operation speed and wide in application range.

Description

Technical field [0001] The invention relates to the field of performance testing of electric vehicles, in particular to a signal analysis method for quickly locating CAN signals by using diagnostic signals. Background technique [0002] With the vigorous development of the new energy electric vehicle industry, accurate testing and evaluation of international advanced new energy vehicles has become one of the main tasks of the current automotive industry. Accurate and reliable signal acquisition can provide basic guarantee for high-quality testing and evaluation of various new energy vehicles. Compared with signals obtained through other methods, communication CAN signals have a series of advantages such as high reliability, high frequency, and better real-time performance. And with the continuous introduction of advanced new energy vehicles, higher requirements have been placed on the timeliness of testing and evaluation. Therefore, as many key signals as possible from the comm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0213
Inventor 欧阳周舟关静杨欣茹唐国强徐磊王鹏尹华钢
Owner 中汽院新能源科技有限公司
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