Design Of Vibration Test System Based On Wireless WiFi

The vibration characteristic is one of the important indexes to evaluate the health status of the structural components of the armored special vehicle action system.Accurate testing of this parameter can provide an effective scientific basis for the evaluation of mechanical operation quality.One of the characteristics of the action system is movement,and most of its test parts are rotating or reciprocating moving parts.The traditional wiring testing method often requires a large number of cables and complex testing equipment,which will not only affect the test effect,but also increase the test cost.In contrast,the non-lead design of the storage test method can effectively overcome the problem of cable layout.However,in the narrow and compact test environment of the mobile system,the trigger of the test device and data recovery are relatively difficult,so the application of this method also has some limitations.Although the wireless storage testing method can solve the above problems,the volume and mechanical structure of the mature wireless peripheral modules in the market cannot be controlled.Therefore,it is difficult to adapt to some special applications of vehicle vibration testing.In view of the shortcomings of the above testing methods,this topic combines the requirements of real-time transmission,data reliability and testing efficiency in the vibration testing of armored special vehicles.A vehicle vibration testing system based on wireless WiFi technology is developed and designed.The specific work is described as follows:First of all,according to the vibration testing requirements of the armored special vehicle mobile system and the characteristics of the mainstream wireless communication mode,WiFi is selected as the communication mode of the system through analysis and comparison.On this basis,two overall system architecture schemes are designed and evaluated.Finally,the MCU+FLASH architecture design with smaller size and lower power consumption is selected.At the same time,the main control and peripheral chips are selected according to the test function requirements,and the design basis and steps of each module are introduced in detail.Secondly,according to the characteristics of each chip,the system node main control and peripheral function module circuit is designed,the WiFi RF partial impedance matching is simulated,and the corresponding four-layer PCB board is drawn.On the basis of the completion of the hardware platform,the corresponding firmware interface driver and application program are compiled,and the host computer software of the information control platform is designed at the same time.Finally,in order to ensure the stability and reliability of its work,the functional modules and the overall performance of the system nodes are tested.The test results show that the node can effectively collect vibration data and record it in FLASH and can correctly receive commands and upload vibration data information through WiFi.Compared with the traditional vibration testing equipment,the system node has the advantages of small size,flexible layout,convenient data recovery and so on.In some unfavorable cases,such as the space of the tested point is narrow or the installation and disassembly of the test device is inconvenient,the system can also solve the problems of work trigger and data recovery.The overall testing efficiency is greatly improved.