摘要
针对平台式测力仪被放置在工作台上而不能测量双侧复合搅拌摩擦焊过程中焊接力的问题,设计了一款置于主轴前端的旋转式压电测力仪,并利用有限元仿真对其进行了静力学与模态分析。考虑到整套设备庞大、连线繁杂,不适用于长程焊接,设计了一块信号调理电路板内嵌于测力仪中,将传感器产生的微弱电荷信号转换放大为模拟电压信号。通过标定及实测,得到了电路板线性度误差、准确度误差等指标,结果表明其性能良好,满足压电测试需求。
In order to solve the problem that the platform dynamometer cannot measure the welding force in the two-side composite friction stir welding process because it is placed on the work table,a rotary piezoelectric dynamometer was designed and placed at the front of the spindle,and the static and modal analysis was carried out by finite element simulation.Considering that the whole equipment was large and complicated,which was not suitable for long-range welding,a signal conditioning circuit board was designed and embedded in the dynamometer to convert the weak charge signal generated by the sensor into analog voltage signal.The linear error and accuracy error of the circuit board were obtained through calibration and measurement.The results show that the circuit board has good performance and meets the requirements of piezoelectric testing.
作者
佟生
任宗金
张军
孟庆增
TONG Sheng;REN Zongjin;ZHANG Jun;MENG Qingzeng(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2023年第8期31-37,共7页
Instrument Technique and Sensor
基金
国家自然科学基金(52075079)
国家重点研发计划(2019YFA0709003)。
关键词
双侧复合搅拌摩擦焊
压电测力仪
信号调理电路
标定实验
double compound friction stir welding
piezoelectric dynamometer
signal conditioning circuit
calibration experiment
