基于微型数据采集器的一体化天平研制及应用  

Study and application of integrated balance based on micro data collector

作　　者：谢飞[1,2] 蒙泽威 许晓斌 Xie Fei;Meng Zewei;Xu Xiaobin(Hypervelocity Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China;National Key Laboratory of Aerospace Physics in Fluids,Mianyang 621000,China)

机构地区：[1]中国空气动力研究与发展中心超高速空气动力研究所,绵阳621000 [2]飞行器流体物理全国重点实验室,绵阳621000

出　　处：《电子测量技术》2024年第19期88-95,共8页Electronic Measurement Technology

基　　金：国家重点研发计划项目(2020YFA0405700)资助。

摘　　要：针对传统应变天平模拟信号传输方式存在抗干扰能力弱、传输距离短、线缆复杂等问题,开展了基于微型高精度数据采集器的一体化数字天平研制及应用。通过将微型高精度数据采集器嵌入测力天平,并且在微型高精度数据采集器中集成具有浮点运算能力的微控制单元,结合天平静态校准公式实现了天平实际力/力矩的实时解算和输出,并且实现了天平测量信号由模拟方式传输向数字方式传输的转变,提高测试系统的抗干扰能力。通过风洞内抗干扰测试表明,在常规高超声速风洞较为复杂的电磁环境下一体化天平信号传输几乎零干扰;通过开展高超升力体标模风洞试验验证表明,一体化天平试验重复性好(精度高),数据规律与常规天平测量结果一致,轴向力系数、法向力系数和俯仰力矩系数最大偏差分别为2.1%、1.8%和3.6%。Aiming at the problems of weak anti-interference ability,short transmission distance and complex cable in the traditional analog signal transmission mode of strain balance,an integrated digital balance based on micro high-precision data collector was developed and applied.By embedding the micro high-precision data collector into the strain balance and integrating the microcontroller unit(MCU)with floating-point operation ability in the micro high-precision integrated data collector,the real-time calculation and output of the actual force/torque of the balance were realized by combining the static calibration formula of the balance,and the transformation of the measurement signal of the balance from analog mode to digital mode was realized,thus improving the anti-interference ability of the test system.The anti-interference test in the wind tunnel showed that the signal transmission of the integrated balance was almost zero interference in the complex electromagnetic environment of the conventional hypersonic wind tunnel;the wind tunnel test of high lifting body model showed that the integrated balance test has good repeatability(high precision),and the data rules were consistent with the measured results of conventional balance.The maximum deviations of axial force coefficient,normal force coefficient and pitching moment coefficient were 2.1%,1.8%and 3.6%,respectively.

关 键 词：应变天平 微型数据采集器 风洞试验 气动力 信号传输 

分 类 号：TN79[电子电信—电路与系统]