摘要
工业生产中需要对物料的料位信息清晰掌握,固态物料的料位测量技术难度大、测量成本高、没有液体物料测量系统经验丰富;为了解决工业生产中固态物料的料位测量难题,设计了一种基于振动的固态物料料位计测量模块;该测量模块通过采集振动信号,并将振动信号的频谱峰值及对应的频率和其对应的料位信息进行最小二乘拟合可以得到振动信号频谱峰值及对应的频率与料位的关系;将采集到的振动信号进行频谱计算将特征量代入拟合好的关系式可得到料位信息,该模块选用STM32F103ZET6单片机作为主控单元,ADXL345加速度传感器进行振动信号采集,XTR116电压转电流芯片将料位信息以4~20 mA标准工业电流环的形式输出;该测量模块可以实现可调节时间间隔料位显示,测量误差小于2 cm;该模块成本低,准确率高,满足工业条件下的固态物料料位测量要求。
Industrial production needs to have a clear grasp of the level information of materials.The level measurement technology of solid materials is difficult,the measurement cost is high,and there is no rich experience in liquid material measurement systems;in order to solve the problem of level measurement of solid materials in industrial production,the design A vibration-based solid material level meter measurement module;the measurement module collects vibration signals,and performs least-squares fitting of the peak of the frequency spectrum of the vibration signal and the corresponding frequency and its corresponding material level information to obtain the vibration signal spectrum The relationship between the peak value and the corresponding frequency and the material level;the frequency spectrum of the collected vibration signal is calculated,and the characteristic quantity is substituted into the fitted relationship to obtain the material level information.The module uses the STM32F103ZET6 single-chip microcomputer as the main control unit and the ADXL345 acceleration sensor.Vibration signal acquisition,XTR116 voltage-to-current chip outputs material level information in the form of 4~20 mA standard industrial current loop;this measurement module can realize adjustable time interval material level display,the measurement error is less than 2 cm;this module has low cost and accuracy High,meet the requirements of solid material level measurement under industrial conditions.
作者
梁玮
高天德
LIANG Wei;GAO Tiande(College of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072)
出处
《计算机测量与控制》
2021年第9期226-232,共7页
Computer Measurement &Control
关键词
振动
料位计
数据采集
固态
频谱
最小二乘
相位
vibration
level gauge
data collection
solid state
spectrum
least squares
phase
