基于无线充电的低功耗曲轴应力测试系统

Low Power Crankshaft Stress Testing System Based on Wireless Charging

曲轴是决定内燃机寿命的重要部件,长时间承受交变的复合应力作用,从而易产生疲劳失效。针对曲轴动态应力测试手段存在不足的问题,设计了一种续航久、可无线充电的应力测试系统。采用内置AD的单片机和EEPROM设计采集存储电路,辅以合适的电源管理策略,降低了系统功耗;采用无线充电技术,利用空闲时间进行充电,使设备可以一次安装后完成多次测试需求;采用ZigBee通信的方式传输测试数据,使外部可以实时监控测点应力情况。模拟试验表明,系统耐高温能力强,能完成在曲轴恶劣工况下的测试任务,数据可靠性好,设备续航优秀,满足测试需求。

The crankshaft is an important component that determines the life of an internal combustion engine.It bears compound alternating stress for a long time,so it is easy to produce fatigue failure.Aiming at the shortage of crankshaft dynamic stress testing methods,a stress testing system with long endurance and wireless charging was designed.AD and EEPROM were used to design the acquisition and storage circuit,supplemented by appropriate power management strategy,thereby the system power consumption was reduced.Wireless charging technology was adopted,charging in idle time,so that the equipment could complete multiple testing requirements after one installation.Furthermore,the ZigBee communication method was adopted to transmit the test data,so that the external could monitor the stress of the measured point in real time.The simulation test shows that the system has a strong ability to withstand high temperature and can complete the test task under harsh crankshaft conditions.The reliability of the data and the endurance of the equipment are also excellent.In summary,the test requirements can be fully met.