Fault diagnosis method, information determination method as well as corresponding device and equipment

Abstract

The embodiment of the invention discloses a fault diagnosis method, an information determination method as well as a corresponding device and equipment. The method comprises the following steps: analyzing a prestored encryption diagnostic protocol packet, acquiring at least one diagnostic protocol, wherein the encryption diagnostic protocol packet is determined and sent by a diagnosis server in advance, sending a diagnosis request containing the diagnostic protocol to a to-be-diagnosed vehicle, so as to enable the to-be-diagnosed vehicle to perform fault diagnosis on a corresponding function according to the received diagnosis request, performing interaction on the to-be-diagnosed vehicle and a user terminal based on a near field communication protocol, and receiving and displaying a faultdiagnosis result, sent by the to-be-diagnosed vehicle, in a set display mode. Compared with the prior art, the embodiment of the invention takes the user terminal as an intermediary, the diagnosis server firstly interacts with the user terminal, the diagnosis protocol is stored in the user terminal, when diagnosis is required, the to-be-diagnosed vehicle interacts with the user terminal by virtueof the near field communication protocol, and effective fault diagnosis is realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of fault diagnosis, and in particular to a fault diagnosis method, an information determination method, corresponding devices and equipment. Background technique [0002] With the development of technology, the functions of automobiles continue to increase, and the number of on-board electronic control units (Electronic Control Unit, ECU) that is compatible with the functions is also increasing. Can effectively judge the fault. [0003] At present, there are three fault diagnosis methods. The first one is that a professional uses a diagnostic instrument to send a diagnostic request to the ECU in the vehicle. The ECU in the vehicle performs a diagnosis according to the diagnostic request, and sends the diagnostic result to the diagnostic instrument for display. , the interaction process between the diagnostic instrument and the ECU in the vehicle is as follows: figure 1 As shown, i...

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Problems solved by technology

[0003] At present, there are three fault diagnosis methods. The first one is that a professional uses a diagnostic instrument to send a diagnostic request to the ECU in the vehicle. The ECU in the vehicle performs a diagnosis according to the diagnostic request, and sends the diagnostic result to the diagnostic instrument for display. , the interaction process between the diagnostic instrument and the ECU in the vehicle is as follows: figure 1 As shown, in this diagnosis method, since the user does not understand the fault behavior corresponding to the embedded software of the ECU, he can only listen to the explanation or repair advice of professionals, and cannot use the diagnostic instrument to diagnose

The second is to establish a wireless connection between the diagnostic instrument and the corresponding ECU in the vehicle. The interaction process between the diagnostic instrument and the ECU in the vehicle is as follows: figure 2 As shown, although this diagnosis method can realize the user's self-diagnosis, due to the different diagnosis standards of each ECU, the user cannot distinguish the diagnosis results, and the diagnostic instrument of this method has a one-to-one correspondence with the ECU. poor compatibility

The third is that the server obtains the corresponding diagnostic protocol according to the diagnostic request sent by the diagnostic instrument, and sends the diagnostic protocol to the in-vehicle ECU wirelessly, so that the in-vehicle ECU can diagnose according to the received diagnostic protocol. The interaction process is as follows: image 3 As shown, although this diagnosis method can solve the problem of poor compatibility of the above-mentioned diagnostic instruments, due to the need to frequently access the server, for vehicles equipped with power supplies, the power consumption of the vehicle will increase, and building a server that is frequently accessed requires a lot of The operating cost is high. If the access fails, it is easy to cause a large area of ​​vehicle diagnosis to be paralyzed. In addition, there will also be a problem that the diagnosis interaction with the server cannot be performed due to the lack of network or poor network in the environment where the vehicle is located.

[0004] Therefore, none of the above-mentioned existing fault diagnosis methods can effectively realize the fault diagnosis of the vehicle.

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