基于DSP的磁致伸缩液位传感器

Magnetostrictive Liquid Level Sensor Based on DSP

针对影响磁致伸缩液位传感器测量精度的原因,介绍了一种基于DSP的磁致伸缩液位传感器的设计方法,并从硬件和软件方面进行了论述。硬件方面,采用DSP TMS320F2812为微处理器,包括激励脉冲电路、放大电路、液晶显示电路和串口通信电路等;软件方面,结合FIR滤波算法,提出一种新的磁致伸缩传感器检测液位方法——全波采样法。该算法通过提供特征点,有效避免了传统硬件滤波电路和检测电路带来的测量误差。液位测量实验证明,系统方案设计合理,测量数据精度较高,很好地满足了实际测量要求。

This paper introduced a DSP based design method for magnetostrictive liquid level sensor, aiming at improving met- rieal accuracy ,addressing the hardware and software scheme. DSP TMS320F2812 microprocessor, impulse-stimulant circuit, ampli- tiers, liquid crystal display circuit and serial communication circuit were adopted in hardware design, Combined with FIR filtering algorithm, a new detection method for magnetostrietive liquid level sensor was put forward, called full-wave sampling, which avoided metrical error in traditional hardware filtering and detecting circuit, by offering feature points. The level metrical experiment results show that the design scheme is reasonable satisfies actual measurement requirements with higher metrical accuracy.