还原地动仪 破译196字古书
真正的张衡地动仪会是什么样? 目前所有记载仅仅只是《后汉书中》的196字，它们就像密码一样，把张衡和他的地动仪锁在尘封的历史中。
悬垂摆原理
考古发现汉代已有的吊灯，张衡地动仪的灵感就来自这里。
在各国的地动仪模型中，一种与直立棍不同的思路引起了冯锐的注意。“地震没地震，抬头看吊灯”，就是因为高高悬垂的吊灯对地面的水平运动非常敏感，会因惯性不停摇摆。19世纪，现代地震学鼻祖米尔恩把“中有都柱”译成“中间有一根柱子，这根柱子是悬挂起来的。”
但1800年前的东汉，张衡怎会可能会想到利用悬垂摆的原理来发明地动仪呢？考古发现汉代就已经有吊灯。作为测震仪器，悬挂物有四个优点：第一，地震时才动；第二，十分灵敏；第三，频繁晃动，很容量被人发现；第四，《后汉书》中记载，“地动摇尊”，然后“尊则震，龙机发，吐丸，蟾蜍张口衔之，”说明悬挂物观测的是水平运动。巧设 “机”“关”各指一物，后者就是古代的门闩复原最关键部分，其设计内部结构，最重要的就是都柱，史书记载，都柱感受到地震波后发生共振，引发地震方向的龙头吐丸，其余7个龙头不动。地动仪是怎样做到的呢？
史料中只有“施关发机”4个字，根据这句话，冯锐在都柱下设计了8个方向的凸起，直接触击龙头吐丸，可是动量太小，无法让都柱摆动。就算都柱能动，8个触点相隔45度，都柱运动的惯性也无法做到“一龙发机七首不动”。
冯锐重读古书，几个关键字引起了他的注意，“施关发机，机关巧制，皆隐在尊中”。“机关”究竟是什么意思？冯锐发现“施”为动词，“关”是名词，“发”是动词，“机”又是名词，也就是说，“机“和“关”是两个物体。
“机”很容易理解，“关”究竟是什么东西，冯锐做了大量的研究工作，最终了解“关”就是古代的门闩
。古人为解决物体运动的动量不足，常常采用小的触发机构来放大动量，这个触发机构就叫做关。
原来，地动仪能够准确验震的最大秘密就在于这个灵敏的触发机构“关”，它处下都柱下方一个极小的锥形小台上，地震方向微弱的地震波传来，都柱和樽体发生相道中。道的尽头，正是连接龙头的杠杆结构“机”，小球触碰到机，龙口吐丸。
重现人间
史料证实，公元134年陇西地震让地动仪声名运扬
冯锐据《后汉书》推断，发生在公元134的陇西地震，震中位于现在甘肃天水附近，距离京师洛阳600公里，洛阳地震烈度为3度到4度……..在如此精确的数据下，复原后的地动仪在地震波的方向上吐丸正确，复原工作获得了成功。此后，研究人员又多次在真实的地震中检验了复原后的地动仪并取得成功。
冯锐向世人证明了这个世界上最早的验震器绝非神话，它真的存在过、工作过。豪不夸张地说，张衡地动仪，不仅回答了国内外的质疑，也重新连接起这些失落的环节，让张衡和他的地动仪获得新的生命。
译文:
Recreate Chang's seismograph and Restudy ancient documents with 196 words
What’s even model of Chang's seismograph? So far, justly a few 196 words in After the Han Dynasty, which seal to Chang’s seismograph and his in history as a code.
The overhang-swing of principle
Chang's Seismograph construction thinking has been enlightened by chandelier of period of Han at archaeology work.
There one thinking difference with upright stick thinking in every country’s Seismograph model being noted by FenRui. “May or not be quake is occur with look up see chandelier to know”. Because of a lofty overhang chandelier very sensitive to ground plane motion and it is shaking repeatedly by action of inertia force during a quake happen. In 19 century, a“zhong you du zhu”of ancient Chinese seismographic phrase was translated “one stick in the middle and it is hanged” by the ancestor Ernt of modern seismology .
How seismography had been invented by changheng with made use of an overhang-swing of principle on BC 1800.The evidence of chandelier to show it existed in period of Han by archeology work.
To be Chang's seismography, overhang-object with four features: first, while quake is occurring, that is moving. Second, it very sensitive and third it's so often shaking that easy to notice. Fourth , according of After the Han Dynasty:“ quake is occurring then jar is shaking ”then jar is shaking ,a head of dragon device will be operating and spiting a ball, a shaped clam device is holding a ball with mouth. Base on these descriptions, we conclude that overhang-object to observe ground level motion. Skilful arranged two objects that one is“ji ” another one is “guan”。The latter is greatest important a part of latch of ancient for recreate it. “du zhu” is greatest important a spare part of structure in inner design. In historical records of it take place resonance by earthquake wave effluences to all of “du zhu ” begin work. Then indicate a head of dragon device would spit a ball during that way of place where is happen to quake and except other sevens. How did the Chang’s seismography do that?
Just only a Chinese phrase which “shi guan fa ji” in historical records. Refer to this phrase the eight part of heave was created within “du zhu” by FengRui but their power of movement too lightly to shake with “du zhu”. Although heave parts can trigger a head of dragon device and it would be spit a ball. One cause of eight touching-point has 45°to each other . In addition to an factor of inertia of “du zhu” we couldn’t get a effect as “ yi long fa ji qi shou bu dong” in Chinese phrase .(Just only one a head of dragon device is operating without other sevens when the earthquake to happen.
FengRui restudies a few key words in historical records and something comes into his notice “shi guan fa ji, ji guan qiao zhi, jie yin zai zunzhong”.( “ trigger and latch section 、skilful arranged latch and trigger 、latch and trigger part both of hidden in jar.”) what’s even real mean “ ji guan ”? He pay an attention to “shi” 、“fa”、 “ji” and“guan” are meaning verb and noun separately .
In other word, “ji” and “guan” is different two objects.
It does very easy understand to “ji” and what does even mean “guan?”Thus, a lot of works has been done by FengRui and finally get an answer of “guan” which is a latch in ancient. In order to solve to short of power of movement problem in objects, a small spare parts of trigger usually was adopted to increase movement energy by ancestor. The spare part of trigger called “guan”.
In fact, one greatest secret is a sensitive spare part of trigger - “guan” and that’s why Chang’s seismography exactly forecast earthquake. A spare part of trigger -“guan” is in the under of spare part of “du zhu” very small a cone platform. When earthquake wave from where place is take happen quake, A spare part of trigger and spare part of “du zhu” meeting in passage. At the end of passage, there is a structure of lever named “ji” which is jointed a head of dragon device.
Reborn in the world
Historical records by proved. Well known Chang’s seismography is famous for the LongXi quake on BC 134 years.FengRui is refers to After the Han Dynasty, that center of quake located near at nowadays Gansu tianshui. It is far way 600km Luoyang. The Luoyang quake level is 3 to 4 N…… With so precise date tested, recreated Chang’s seismography is works at successful when quake coming. Farther, workers are test recreated seismography in real quake conditions and get a successful.
Fengrui proves to world that the earliest seismography is not a legend and absolutely exist even works. It’s not exaggeration to say that Chang’s seismography is answer to challenge in domestic and abroad ,also it fund a missing loop to reborn with changheng and his seismography.