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改装一个闭路电视照相机的水平和垂直扫描线路,在电视屏上可以产生椭圆形的映象。该映象与被放映出的圆形标志的轴比大于5:1。利用某些照相机,可以产生20:1的应变比。被放映出的任何形状(简单的或复杂的),都可以被类似地变形,并且对于化石、沉积组构、褶皱、椭圆等等,可以清楚地显示出均匀的纯剪力应变的效果。由原始状态通过持续地增大应变比值,可以获得一个完整的应变顺序。也可以演示应变逆转,所以,在研究变形物质时,就可以获得应变的估定。籍助于屏幕照相,可以快速地和容易地获得学生实习的材料(例如褶皱剖面分类、根据变形的三叶虫和腕足类化石推定应变以及层理对称组构等等)。在生产实习材料时,可以使应变量发生持续的大幅度的变化。
Converting a CCTV camera’s horizontal and vertical scanning lines creates an oval-shaped image on the television screen. The ratio of the axis of the circle to the projected circle is greater than 5: 1. With some cameras, a strain ratio of 20: 1 can be produced. Any shape that is shown (simple or complex) can be similarly deformed and the effect of uniform pure shear strain can clearly be shown for fossils, depositional structures, folds, ellipses, and the like. From the original state by continuously increasing the strain ratio, you can get a complete sequence of strains. Strain reversal can also be demonstrated, so the strain estimate can be obtained while studying the deformation material. Thanks to on-screen photography, internship materials for students can be quickly and easily obtained (for example, wrinkle profile classification, deforming trilobites and brachiopod fictitious strains, and stratified symmetrical formations, etc.). In the production of internship materials, you can make the contingency of continuous large changes.