摘要
针对桥梁建设、改造、维修工程中定位精度差、可靠性低以及质量和安全等问题,将可编程逻辑控制器(PLC)技术和脉宽调制(PWM)技术应用到液压多点同步顶升系统中。该系统通过PLC控制脉冲信号的周期和占空比来调节电磁阀的开闭频率,实现了多点(液压缸)负载不均衡同步升降;分析了该液压同步顶升系统的工作原理,给出了系统软硬件实现方式;利用组态软件监视与控制各顶升点(液压缸)实时运动情况,实现了对该系统压力、位移以及故障的实时远程监控。实际应用结果表明,该系统运行稳定,能满足现场工作要求。
Aiming at solving the problem of low positioning precision, low reliability, quality and safety on bridge construction, reconstruction and maintenance, a hydraulic multi-point synchronized lifting system based on programmable logic controller （PLC） and pulse width modulation （PWM） was designed. In the system, the on/off frequency of the electromagnetic valve was controlled by the PLC-based pulse signal.The muhi-point （hydraulic cylinder） synchronized movements of unbalanced load was realized. After analysis of principle, the method of software and hardware was given. Remote control of the pressure, displacement and breakdown was realized by the controlling of each point movement using KingView. The practice results indicate that the system runs steadily, meets the requirements of field work.
出处
《机电工程》
CAS
2013年第1期31-34,共4页
Journal of Mechanical & Electrical Engineering
基金
科技部科技型中小企业技术创新基金资助项目(09C26113311366)
关键词
脉宽调制
液压控制
多点同步顶升系统
PLC
pulse width modulation（PWM ）
hydraulic control
multi-point synchronized lifting system
PLC
