Abstract: 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.

      Key words: crankshaft；stress test；wireless charging；ZigBee communication；power management