CAN bus load rate testing method, device and system

A CAN bus and test method technology, applied in transmission systems, bus networks, digital transmission systems, etc., can solve the problems of complex implementation and high cost, and achieve the effect of reducing complexity and cost

Active Publication Date: 2015-02-25
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology

[0006] The invention provides a load rate testing method, device and system of CAN bus to solve the pro

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  • CAN bus load rate testing method, device and system
  • CAN bus load rate testing method, device and system
  • CAN bus load rate testing method, device and system

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Embodiment Construction

[0030] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0031] The embodiment of the present invention takes the load rate of the CAN bus as the research object, and finally realizes the test of the load rate of the CAN bus based on the change law of the signal level of the CAN bus. Details are given below.

[0032] figure 1 It is a flow chart of a CAN bus load rate testing method according to an embodiment of the present invention. Such as figure 1 As shown, the method includes the following processing steps:

[0033] Step S102, obtaining the change law of the CAN bus signal level within the test period;

[0034] Step S104, determining the duration of a single message transmitted within the above test time period and the number of messages tra...

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Abstract

The invention provides a CAN bus load rate testing method, device and system. The method comprises the steps that the change rule of a signal level of a CAN bus within the testing time quantum is acquired; the duration time of a single message transmitted within the testing time quantum and the number of messages transmitted within the testing time quantum are determined according to the change rule; the total duration time of all the messages within the testing time quantum is determined according to the number of messages and the duration time; the load rate of the CAN bus is determined according to the total duration time and the testing time quantum. By means of the technical scheme, the problems that implementation is complex and cost is high in a load rate testing scheme of the CAN bus in the related technologies are solved, and the complexity degree and cost of CAN bus load rate testing are reduced.

Description

technical field [0001] The present invention relates to the field of control local area network (CAN for short) bus, in particular, relates to a load rate testing method, device and system of CAN bus. Background technique [0002] The load rate is an important operation technical index of the CAN bus and an important parameter to measure the normal operation of the CAN bus system. CAN bus messages mainly include data frames, remote frames, error frames, and overload frames. Each frame starts with a "dominant" bit (high level) and ends with a "recessive" bit (low level). The level signal of a frame follows a specific change rule, and there will be a corresponding frame gap between adjacent frames. [0003] At present, commonly used CAN bus load rate testing instruments include CAN oscilloscope, CAN development environment (CAN open environment, referred to as CANoe for short), etc., and its testing principle is to capture all voltages of the CAN bus within a period of time ...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/40
Inventor 曾杨刘振兴于晓颖习可陶泽安
Owner ZOOMLION HEAVY IND CO LTD
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