基于MEMS加速度计的倒置开关

摘要

An inversion switch for internal electronic pressure gauges was designed by using MEMS accelerometer MMA8453Q and MSP430 MCU.Thereby,using the direction detection function of the accelerometer,MCU reads its acceleration through the Ⅰ2C interface and judges whether the tested device is inversed.For the designed inversion switch,many inverse tests were carried out by the stepping motor and the success probability was 100％,and the impact resistance was tested by adopting a Hopkinson bar system.The results show that the inversion switch can still work after the impact of 45 000g.So the designed inversion switch can be applied on high-g impact occasions.%运用MEMS加速度计MMA8453Q和单片机MSP430设计了一种针对放入式电子测压器的倒置开关.利用加速度计方向检测功能,单片机通过Ⅰ2C接口读取加速度,判断是否倒置.倒置开关经步进电机多次旋转倒置测试成功率达到100％,并利用霍普金森杆进行了抗过载测试.结果表明,在受到45000g冲击后仍能正常工作,能满足火炮等高冲击场合的测试要求.