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About the development history of the ancient measurement and control technology and instrument analysis

西汉太初历制定期间,落「阂改进了浑仪,川它重新测量了二l八星宿距度等数据。至迟到两汉之际,浑仪己经山一个尚定的赤道环和绕极轴旋转并附有窥管的赤道环组成,两环面上都刻有周天度数,可以测定天体的人宿度和去极度。到东汉前期,民间天文学家傅安第一次给浑仪添加了一个黄道环,它和赤道环成24'夹角,利用防腐温度计黄道环可以测得日月行度。东汉天文学家张衡义给浑仪增加了地平环和子午环,便浑仪逐渐完善。1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

东晋末年永兴年间,在太史令兄崇和鲜卑族天文学家解兰的主持下,铸成了一台铁制浑仪.底部设有十字水准,用来校正仪器安装,提高了浑仪的安装精度,这是找国历史上水准仪的开端。1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

关于壶的制造,自从东汉张衡开始,已经有两级补偿式漏壶的创制。两级补偿式漏壶就是上下有两个漏壶,上一级漏壶的水漏滴到下一级翻壶.去补偿下一级漏壶滴出去的水,使一「一级漏壶的水保持一定的高度,以保证下一级漏壶滴水的快慢基木保持不变。到了晋代,已经有厂三级壶的改进,使时间的测量更加精确。1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

西汉宜帝时,耿寿昌创了川来演示天象的仪器,叫浑象。用铜铸成,跟现今的天球仪相似。东汉的张衡发明了水运浑仪,他用浮球温度计一个大约直径5尺的空心铜球表示天体,面画有列宿和互成240交角的黄道赤道.球外有地平圈和子午圈,子午圈七支架一根天轴,天轴与地平圈成24'的交角,天球可以绕天轴转动。天球转动时,有一半露在地平圈之上,和四时的天空星象相符。有一半隐在地平圈之下。张衡还利用衬壶滴水的等时性,用瀚水作动力,巧妙地通过齿轮系统的转动,骡使天球每均匀地绕天轴旋转一周。这样浑象也就自动地、近似正确地把天象一日里的变化演示出来。这是后世充分发展的水运象仪的鼻祖。1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

三国时期东吴的葛衡创制了一台别致的浑象,叫浑天象。它是一个比较大的空心球,球面上布置星宿,各星都钻出孔隙,人能钻进空心球,看到空隙漏进的光,就像看到天上的星星一般。空心球可以绕轴旋转,这样就更加逼真地演示星辰的视运动,这是近代天文馆里天象仪的雏形。1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

南北朝时期,刘宋元嘉十三年(公元436年),太史令钱乐之又仿葛衡的浑象仪,并加以改进,使浑象仪自动跟天象的运动同步。1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

宋代燕肃发明了“莲花肠”,他在漏壶中第一次用上了“漫流系统”,润壶保持恒定水位,克服了以玻璃管温度计经流量变化对翻壶记时准确性的影响。宋代张思训在979年采用水银作为浑天仪的动力。1088-1092年,苏颂和韩公廉等人发明的“水运仪象台”,既能演示和观察天象,又能自动记时报时,具有多种用途,在天文学史上具有重大意义。1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

友情提示:本文是由www.517mat.com 的磁翻板温度计编写提供,转载请注明出处。1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

看过本文的人还看过:智能仪器的模拟量输入输出通道  1zU磁翻板温度计|玻璃管温度计|浮球温度计|玻璃板温度计|双色温度计

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