液压扳手泵是液压扳手紧固螺栓的动力源，其输出压力的精度直接影响螺栓的联接质量。目前市场上的液压板手泵对压力的控制主要采用溢流阀控制，压力测量上采用机械压力表，误差较大，控制精度低。为了提高液压扳手对预紧及预紧力的精确控制，本文设计了一种基于ARM和Linux操作系统下的液压扳手泵控制器，并详细论述了其设计开发过程。 该控制器采用S3C2440微处理器和Linux嵌入式实时操作系统为相应的硬件和软件开发平台，在对某公司一款特定型号液压扳手深入研究的基础上，总结其在使用过程中出现的问题，并结合国内外发展现状设计开发而成。硬件上综合考虑系统需求、可靠性、接口方便性等因素，为控制器选择了具体的电子元器件；软件上针对S3C2440处理器对BootLoader和Linux内核做了较为详细的分析和移植，编写各模块驱动程序和系统应用程序。该控制器系统具有实时性强，功能扩展容易，系统稳定，适应环境能力强等特点。 与原有控制器相比，该控制器实现了液压扳手的自动紧固和拆卸螺栓的功能，采用LCD触摸屏及图形用户界面方便了人机交互。另外针对压力控制系统进行了详细分析，建立了液压泵系统数学模型，确定了PID控制器控制调节方法，并设计了相应的控制程序，确保压力的精确输出。 实验测试表明，该液压扳手泵控制器达到了设计要求，能够实现自动松紧螺栓动作及压力的精确控制。

Hydraulic wrench pump is the power source of the hydraulic wrench to tighten the bolts. Its output pressure accuracy directly affects the quality of the coupling bolt. Currently the hydraulic wrench pumps’ pressure is mainly controlled by relief valve control and uses mechanical pressure gauge to measure pressure on the market. This method has large error and low control accuracy. In order to improve the hydraulic wrench precise control of preload and preload, this article designs the hydraulic wrench pump controller based on ARM and Linux operating systems, and discusses the design and development process in detail. The controller uses the S3C2440 microprocessor and Linux embedded real-time operating system as the hardware and software development platform to design and develop which on the basis of in-depth study of a particular model a hydraulic wrench, summaries up the problems in the course of usage and combined with the development in the world. Selecting a specific electronic components on hardware for the controller which comprehensives consideration of factors such as system requirements, reliability, interfaces convenience. Analysing and transplanting BootLoader and Linux kernel of the S3C2440 processor on the software. And then writing each module drivers and system applications. The controller system has a lot of advantage such as a strong real-time ability, easy functionality expansion, system stability, to adapt to the environment ability. Compared with the original controller, the controller achieves the function of the automatic hydraulic wrench tightening and loosening bolts, uses LCD touch screen and graphical user interface to facilitate human-computer interaction. In addition, analysing the pressure control system detaily. Establishing the mathematical model of the pump system, determining the accurate output of the PID controller controls the adjusting method, and design the corresponding control program to ensure that the pressure. Experimental tests showed that the hydraulic wrench pump controller meet the design requirements, it is possible to achieve precise control of automatic the elastic bolt action and pressure.