基于多STM32和CAN总线的分布式控制电动护理床设计

Design of Distributed Control Electric Nursing Bed Based on Multi-STM32 and CAN Bus

摘要:

针对传统的电动护理床控制方式单一、信号走线复杂、干扰严重、系统稳定性差的问题，提出分布式控制思路。基于STM32为主控芯片的各个控制单元，分别实现运动控制、检测控制、命令输入、终端集中显示和控制功能，并通过CAN总线进行通信，构成分布式控制系统。详细介绍了各个控制单元的实现原理、硬件设计方案和软件设计流程。系统完整实现了床体动作，包括升降、倾斜和伸缩；床体姿态识别，包括倾斜角度计算和护栏位置识别；床体状态和数据同步显示；控制命令输入功能。经实验测试和实践应用表明，系统性能稳定、动作响应迅速，符合设计规范，能够满足实际应用需求。同时也验证了CAN总线在电动护理床控制系统中应用的先进性。

Abstract:

In order to solve the problems of traditional electric nursing bed, such as simplicity of control mode, complex signal routing, serious signal interference and poor system stability, the idea of distributed control is proposed. Using STM32 as the main control chip, each different control unit implements respectively the function of motion control, detection control, command input, terminal centralized display and control. Control units communicate with each other through CAN bus, which forms a distributed control system. The realization principle, hardware design scheme and software design flow of each control unit are introduced in detail. The system fully realizes the movement of the bed body, including lifting, tilting and stretching; bed body attitude recognition, including tilt angle calculation and guardrail position recognition; synchronous display of the bed status and data; control command input function. The experimental test and practical application show that the system has stable performance and rapid action response. It conforms to the design specifications and can meet the practical application requirements. Also the advancement of application of CAN bus in electric nursing bed control system is verified.