written by
Fu-Kwun Hwang
edited by
Loo Kang WEE and
Wolfgang Christian
The Micrometer Model shows the principle of operation and the physical parts of a real micrometer. Micrometers use a screw to amplify distances that are too small to measure directly into large rotations of the screw that are big enough to read from a scale. The accuracy of a micrometer derives from the accuracy of the thread that is at its heart. The basic operating principle of a micrometer is that the rotation of an accurately made screw can be directly and precisely correlated to a certain amount of axial movement (and vice-versa), through the constant known as the screw's lead.
The Micrometer model was created using the Easy Java Simulations (EJS) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double click the ejs_ntnu_Micrometer.jar file to run the program (Java must be installed).
Please note that this resource requires
at least version 1.5 of
Java (JRE).
Micrometer Model Source Code
The source code zip archive contains an XML representation of the Micrometer… more... download 39kb .zip
Last Modified: September 10, 2009
3B (9-12) #6. To reduce the chance of system failure, performance testing is often conducted using small-scale models, computer simulations, analogous systems, or just the parts of the system thought to be least reliable.
11. COMMON THEMES
B. Models
11B (6-8) #2. Mathematical models can be displayed on a computer and then modified to see what happens.
12. HABITS OF MIND
B. Computation and Estimation
12B (9-12) #9. Consider the possible effects of measurement errors on calculations.
C. Manipulation and Observation
12C (6-8) #3. Read analog and digital meters on instruments used to make direct measurements of length, volume, weight, elapsed time, rates, and temperature, and choose appropriate units for reporting various magnitudes.
Hwang, F. (2009). Micrometer Model [Computer software]. Retrieved September 7, 2010, from http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9422&DocID=1315
%A Fu-Kwun Hwang %T Micrometer Model %E Loo Kang WEE %E Wolfgang Christian, (eds) %D September 10, 2009 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9422&DocID=1315 %O application/java
%0 Computer Program %A Hwang, Fu-Kwun %D September 10, 2009 %T Micrometer Model %E WEE, Loo Kang %E Christian, Wolfgang %8 September 10, 2009 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9422&DocID=1315
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