Domestic exhibitors showcased diversified feature products : multiple variety and complete series in crawler cranes , high technical contents in all terrain cranes , state - of - arts technology from truck crane manufacturers , future concepts exhibition of high - speed , rough - terrain wheel cranes 中国展商纷纷展出各具特色的产品：履带式起重机品种多，系列全；全路面起重机技术含量高；汽车起重机生产企业展示了最新的技术；高速越野轮胎起重机将成为未来发展趋势。
According actual situations , a system design pattern called “ double cpu share memory ” is adopted for such a kind of electro - hydraulic proportional controller . so in the third part , the concrete realization is presented to show the efficiency of the system design pattern , in the middle of which it emphatically give out the design of the hardware driving model 针对怎样实现汽车起重机电液比例控制系统核心控制器问题,即系统的设计问题,本文从整体上研究和比较了多种方案,最终选择了双处理器共享内存的体系结构模式,并且从硬件和软件上完成了核心控制器的详细设计。
Jchi has cooperated with tadano ltd . of japan establishing a joint venture of bq - tadano ( beijing ) crane co . , ltd . to manufacture truck cranes and rough terrain cranes , and with singapore technologies kinetics for beijing zhonghuan kinetics heavy vehicles co . , ltd to off - road heavy dumpers and habour haulers 京城重工与世界著名起重机厂商日本株式会社多田野合资设立北起多田野（北京）起重机有限公司，生产汽车起重机和越野轮胎起重机；与新加坡科技动力设立合资企业中环动力（北京）重型汽车有限公司生产重型矿用汽车、港口牵引车等工程车辆产品。
It provides advanced equipment and technology to the customers in china , and imports all kinds of construction machine such as bulldozer , excavator , wheel loader , motor grader , crane , dump truck , special vehicle , road compactor and maintenance equipment , asphalt mixer , crusher , concrete mixer and so on 为中国的工程用户带来日本先进技术和设备，主要经营各类工程机械设备：包括推土机、挖掘机、装载机、平地机、汽车起重机、自卸车和各种用途车辆、路面路基压实维护设备、沥青洒布拌和设备、以及成套的碎石设备、混凝土办和设备。
The design method of main mechanisms of the crane , which includes the winch section , rotary bearing , and the extension section , is described . the layout of directing ( triangle ) tri - joint mechanism , which affects the performance of crane greatly , is optimized . at the same time , the load of axles , the rated load capacity which depends on the tipping stability of the crane and the maximal support force of the out - triggers are calculated by the vb programs 本文对于qy25型汽车起重机的设计进行了研究，就汽车起重机主要机构如起升机构、回转机构、伸缩机构的型式及计算方法做出了论述，对影响起重机性能的三铰点布置进行了优化，用vb语言对计算繁琐的起重机桥荷、稳定性决定起重量、最大支腿反力的计算进行了程序编制，对确定中、小型汽车起重机设计方案，具有很强的现实意义。
Design philosophy of hardware and software is established . the paper bases control algorithm of operator and control program diagram on thorough investigation into truck crane operation reliability action flow , which makes sure of accurate and effective control over handle and accelerograph and achieves test process automatization 文章在深入研究汽车起重机作业可靠性试验动作流程的基础上确定了对执行机构的控制算法，并给出控制程序框图，准确有效地实现了对操纵手柄及油门的控制，达到试验过程自动控制的目的。
Based on above two points , developing electro - hydraulic proportional controller of having independent intellectual property is now urgent to civil auto crane manufacturer . at the beginning , in this thesis , a serial of models about auto crane ’ s function , construction and action are provided after being carefully analyzed with the modeling tool uml ( united modeling language ) . using these models , we can easily get along with the design and realization of electro - hydraulic proportional controller 本文首先从研究汽车起重机的功能入手,以面向对象的观点和使用uml作为建模工具,透彻地分析了汽车起重机功能应该具有的结构、行为特性,经过分析得出的结构、行为方面的特性是作为汽车起重机功能的内部描述存在的、具有固定不变的特点,这些特性的描述是研究与设计汽车起重机电液比例控制系统所必需的基础工作。
