A real-time synchronization method for fuel cell vehicle power performance test system

Abstract

The invention relates to a real-time synchronization method of the dynamic performance test system of fuel cell vehicles, which is used for the clock synchronization and the data synchronization of communication networks of the dynamic performance test system of the fuel cell vehicles. The method comprises steps as follows: (1) the communication network of the dynamic performance test system of the fuel cell vehicle is established; (2) clocks of all the device nodes in the communication network are synchronized by using the NTP (Network Time Protocol) network synchronization method; and (3) the hardware and software of the communication network are configured separately, synchronous timing rules are made, and thus the data of the entire communication network are synchronized. Compared with the prior art, the invention has the characteristics of overall planning, a plurality of communication protocols, capacity of meeting load requirements, distributed network and the like.

Description

technical field [0001] The invention relates to the technical field of fuel cell vehicle testing, in particular to a real-time synchronization method for a dynamic performance testing instrument system of a fuel cell vehicle power system. Background technique [0002] Fuel cells can directly convert the chemical energy of fuel into electrical energy, and have high power generation efficiency. At the same time, the way fuel cells use energy is much better than internal combustion engines that emit a large amount of harmful exhaust gas, most of which are water. Therefore, fuel cell vehicles have better fuel economy and environmental protection than traditional fuel vehicles, and have become an inevitable choice for modern and future automotive development, and their research and development have also become a hot spot in the automotive industry. [0003] The test method of fuel cell vehicle power system is an important support to ensure its successful development. The curren...

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Problems solved by technology

[0005] Chinese patent CN102591996A provides a data synchronization framework and method for multiple measuring instruments, so that multiple measuring instruments can be connected to each other for channel expansion, one of the measuring instruments is the main control measuring instrument, and the other The measuring instrument is a passive measuring instrument, and the master measuring instrument can output a synchronization signal to the passive measuring instrument, so that the passive measuring instrument can sample the synchronous signal as a data synchronization mark, and store In the memory, in addition, the data and marks in the memory of all measuring instruments are transmitted to a processing platform, and the passive measuring instrument is adjusted to be consistent with the master measuring instrument through the built-in software of the processing platform. The length of the data waveform, in order to solve the clock error of the measuring instrument itself, and solve the problem that the length of the sampling data is different, and the data of multiple measuring instruments cannot be processed synchronously

[0006] Although the above patents involve real-time synchronization between instruments, the network structure is relatively simple, most of which only involve a single network, and do not involve the application of reflective memory, and there is no synchronization method for fuel cell vehicle power system test instruments

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