基于Kalman滤波器的高精度电子称设计

Design of High Precison Electronic Scale Based on Kalman Filter

摘要:

针对传统电子称功能单一、数据稳定速度慢、精度低等问题，设计了一种基于Kalman滤波器的高精度电子称。系统以STM32为主控单元，详细介绍了各个模块的实现方法。首先设计了高精度的应变片式称重传感器，并在该硬件基础上设计了更加快速有效的数据滤波算法，然后从算法的时间复杂度和空间复杂度的角度，对电子称中数据的几种常用滤波方式进行了对比。最后在传统电子称的基础上增加了一些联网、标定等新颖功能。实际测试结果表明，该电子称性能稳定，数据稳定速度快，称重精度满足国家规定的三级称称重标准。

Abstract:

A high precision electronic scale based on Kalman filter was designed for the problems of traditional electronic scale with single function, slow data stability and low precision. The system takes STM32 as the main control unit, and introduces the implementation methods of each module in detail. Firstly, a high precision strain gauge weighing sensor is designed, and a more efficient data filtering algorithm is designed on the basis of this hardware. From the perspective of time complexity and space complexity of the algorithm, several common filtering methods of data in electronic scale are compared. Finally, some new functions such as networking and calibration are added on the basis of traditional electronic scale. The actual test results show that the performance of the electronic scale is stable, the speed of data stabilize is fast, and the weighing precision meets the national standard of three-level scale.