distant adj. 1.远,远方的,远离的,远隔的;相距(若干路程)的。 2.冷淡的,疏远的,有隔阂的。 3.(亲戚)远族的,远房的;(朋友等)泛泛之交的,交情不深的。 4.隐约的,不清晰的。 a distant place 远方。 a distant view 远景。 a distant letter 来自远方的信。 a distant sound 远处传来的声音。 distant ages 往昔。 distant centuries past 经过多少世纪。 10 miles distant from here 离这里十英里。 a distant voyage 远航。 a distant politeness 敬而远之。 a distant air [manner] 冷淡的态度。 a distant connection [relative] 远亲。 a distant acquaintance 点头之交。 one's distant youth 早已逝去的青年时期。 a distant likeness [resemblance] 约略相似。 at no distant date 不日,日内。 distant crossing [hybridization] 【植物;植物学】 远缘杂交。 have not the most distant idea (of a matter ) 很不明白(某事)。 make a distant allusion 迂回曲折地暗示。 adv. -ly 远地,遥远地 ( be distantly related to 和…是远亲)。
Is optical fiber the only way to communicate information to a distant control center 光纤是向远端的控制中心传输信息的唯一办法吗?
In the hardware design , the paper completes modules ’ design like outside memory , patulous a / d , patulous d / a , rs232 communication , ecan communication , led control , keyboard control , distant control , emulation , reset , logic voltage switch , dsp supply power regulate and ac - dc power circuit , as well as room layout design like anterior panel , back panel etc . and dsp transfers data with peripheral equipments except outside memory using serial ports . besides , the whole circuit is configured in interrupt response . thus , it can meet system demand as well as take full advantage of tms320f2812 ’ s hardware resource . in the software design , the paper finishs programs like the interface programms intercommunicates with people , the distant control program , ad and da modules ’ control program , in addition , the paper select the velocity and acceleration state - feedback algorithm and is written in the program . the software design uses dsp integrate exploiting environment named ccs2 . 2 of ti inc . as software instrument , and programs with the combination of c language and assembly language . moreover , in order to maintenance or modify the software expediently and shorten software ’ s exploitation time , the design adopt software modularization technique . finally , some air cylinder experiments are carried out to proved that the pneumatic controller is very practical 在硬件设计中,本文完成了片外存储器扩展、 a / d扩展、 d / a扩展、 rs232通信接口、 ecan通信总线接口、液晶显示控制、键盘控制、远程控制、仿真、复位、逻辑电平转换、 dsp工作电源校正电路和ac - dc电源等模块设计以及控制器前面板、后面板等的空间布局设计。其中dsp与除外部存储器的外围设备之间的数据传送全部采用串口通信,同时系统电路配置成中断响应方式,这样既满足了系统要求,又充分利用了tms320f2812的硬件资源。在软件设计中,本文完成了人机界面功能模块、远程控制模块、 ad扩展模块、 da扩展模块、速度和加速度状态反馈的控制算法的程序设计。